Horizontal rotary compressor, air conditioning system, and vehicle

Abstract

A horizontal rotary compressor, an air conditioning system, and a vehicle. The horizontal rotary compressor comprises a second housing, a pump body structure, and a third sealing structure. The pump body structure is provided in an inner chamber, and a back pressure chamber in communication with a gas outlet is defined between the pump body structure and a wall surface of the inner chamber. The pump body structure comprises a compression mechanism, an auxiliary bearing, and a muffler. The auxiliary bearing is provided between the compression mechanism and the muffler, and a silencing chamber is defined between the auxiliary bearing and the muffler. The silencing chamber is in communication with an outlet of the compression mechanism and the back pressure chamber. An oil return chamber is defined between the second housing and the auxiliary bearing. The oil return chamber is located at an end of the auxiliary bearing facing away from the compression mechanism. The third sealing structure is an integral member, and is sealed between the auxiliary bearing and the muffler and between the auxiliary bearing and the second housing, so as to separate the silencing chamber from the oil return chamber and separate the back pressure chamber from the oil return chamber.

Description

Horizontal rotary compressors, air conditioning systems and vehicles

[0001] Cross-reference to related applications

[0002] This application is based on and claims priority to Chinese patent applications No. 202411217004.5, No. 202422141525.9, No. 202422141565.3, No. 202422141600.1, and No. 202422141600.1, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of compressor technology, and in particular to a horizontal rotary compressor, an air conditioning system, and a vehicle. Background Technology

[0004] A compressor is a driven fluid machine that raises low-pressure gas to high-pressure gas. It is the heart of a refrigeration system. It draws in low-temperature, low-pressure refrigerant through the suction pipe, compresses it using a piston driven by a motor, and then discharges high-temperature, high-pressure refrigerant through the discharge pipe, providing power for the refrigeration cycle. In a horizontal rotary compressor, the motor drives a rotating piston to compress the refrigerant.

[0005] In related technologies, sealing gaskets are installed inside the compressor at the locations where sealing is required. Therefore, the structure of the compressor will affect the locations where sealing is required, leaving room for improvement in the compressor's sealing design. Summary of the Invention

[0006] This application aims to solve at least one of the technical problems existing in the related art. To this end, this application proposes a horizontal rotary compressor, an air conditioning system, and a vehicle.

[0007] A horizontal rotary compressor according to a first aspect of this application includes: a second housing having an inner cavity and an outlet; a pump body structure disposed in the inner cavity and defining a back pressure chamber communicating with the outlet between the pump body structure and the wall of the inner cavity; the pump body structure including a compression mechanism, a secondary bearing, and a muffler; the secondary bearing being disposed between the compression mechanism and the muffler and defining a muffler cavity between the secondary bearing and the muffler; the muffler cavity communicating with the outlet of the compression mechanism and the back pressure chamber; a return oil chamber defining a space between the second housing and the secondary bearing, the return oil chamber being located at one end of the secondary bearing away from the compression mechanism; and a third sealing structure being an integral piece and sealing between the secondary bearing and the muffler, and between the secondary bearing and the second housing, to separate the muffler cavity from the return oil chamber and the back pressure chamber from the return oil chamber.

[0008] According to the embodiments of the present application, the oil return chamber, the silencer chamber, and the back pressure chamber of the horizontal rotary compressor can all be located inside the inner cavity. The three are arranged in a relatively concentrated position, which makes it convenient for the first sealing structure of the integrated structure to separate the three, thereby reducing the risk of air leakage. At the same time, it is beneficial to reduce the number of seals and simplify the assembly process of the horizontal rotary compressor.

[0009] A horizontal rotary compressor according to a second aspect of this application includes: a housing having an inlet and an outlet; a support disposed on the housing and dividing the interior of the housing into a low-pressure chamber and a high-pressure chamber, the low-pressure chamber communicating with the inlet and the high-pressure chamber communicating with the outlet; a motor structure disposed in the low-pressure chamber; and a pump structure disposed in the high-pressure chamber and including a main bearing, a secondary bearing, and a crankshaft. The main bearing is disposed adjacent to the support and defines a first exhaust chamber between itself and the support. The crankshaft passes through the secondary bearing and the main bearing and extends into the low-pressure chamber through a second through hole on the support for transmission connection with the motor structure. The main bearing and the support... A first mounting groove communicating with the first exhaust chamber is formed between the crankshaft and the first mounting groove, which surrounds the crankshaft. A first sealing structure is provided in the first mounting groove and separates the first exhaust chamber from the low-pressure chamber. The first sealing structure includes a first mounting part, a first sealing part, and a second sealing part, which are respectively formed in annular shape. The first sealing part and the second sealing part are both connected to the first mounting part and are spaced apart, so that a mating groove is defined between the first mounting part, the first sealing part, and the second sealing part. The opening of the mating groove is positioned towards the position where the first mounting groove communicates with the first exhaust chamber. The first sealing part abuts against the bracket, and the second sealing part abuts against the main bearing.

[0010] According to an embodiment of this application, the horizontal rotary compressor improves the sealing effect inside the rotary compressor by providing a first sealing structure between the first exhaust chamber and the low-pressure chamber. The mating groove between the first mounting part, the first sealing part, and the second sealing part effectively prevents high-pressure gas from leaking into the low-pressure chamber through possible gaps, thereby maintaining the pressure stability of the high-pressure chamber.

[0011] A horizontal rotary compressor according to a third aspect of this application includes: a housing with an air inlet formed thereon; a support that is disposed on the housing and divides the interior of the housing into a low-pressure chamber and a high-pressure chamber, the low-pressure chamber communicating with the air inlet; a compression mechanism disposed in the high-pressure chamber and having at least one compression chamber; and a filter structure disposed between the air inlet and the inlet of the compression chamber, including a mounting bracket and a filter screen, the filter screen being disposed on the mounting bracket and forming a cylindrical structure, the two axial ends of the filter screen being an upstream end and a downstream end, the mounting bracket closing the downstream end of the filter screen.

[0012] The horizontal rotary compressor according to the embodiments of this application can reduce the risk of impurities entering the compression mechanism by setting a filter structure. It can be applied to scenarios where the compression mechanism is highly sensitive to impurities. For high-precision compression mechanisms, it improves the problem of impurities entering the compression mechanism and causing blockage. Moreover, the mounting bracket closes the downstream end of the filter screen, which can reduce the airflow impact on the filter screen and help improve the reliability of the filter structure.

[0013] A horizontal rotary compressor according to a fourth aspect of this application includes: a housing; a support, the support being disposed on the housing and dividing the interior of the housing into a low-pressure chamber and a high-pressure chamber, the support having a communicating channel communicating with the low-pressure chamber; a pump body structure, the pump body structure being disposed on the high-pressure chamber and including a main bearing, a secondary bearing and a compression mechanism, the compression mechanism being sandwiched between the main bearing and the secondary bearing, the compression mechanism having at least one compression chamber, the main bearing being fixed to the support and defining an exhaust chamber communicating with the compression chamber between the two, the main bearing having an intake channel communicating with the communicating channel and the compression chamber; and a second sealing structure, the second sealing structure being disposed between the support and the main bearing and surrounding the intake channel to separate the exhaust chamber from the intake channel.

[0014] According to the embodiments of the horizontal rotary compressor of this application, by adding a second sealing structure between the support and the main bearing, and cleverly surrounding the intake passage, the second sealing structure effectively isolates the exhaust chamber from the intake passage, thereby preventing high-pressure gas from leaking into the low-pressure chamber. This significantly improves the sealing effect inside the horizontal rotary compressor and simplifies the machining of the sealing position between the support and the main bearing. Therefore, it not only reduces energy loss and improves compression efficiency, but also ensures the stable operation of the horizontal rotary compressor under high-pressure working conditions.

[0015] An air conditioning system according to a fifth aspect of this application includes a horizontal rotary compressor according to any one of the first to fourth aspects of this application.

[0016] A vehicle according to a sixth aspect of this application includes a horizontal rotary compressor according to any one of the first to fourth aspects of this application, or includes an air conditioning system according to the fifth aspect of this application.

[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic diagram of a horizontal rotary compressor according to some embodiments of this application;

[0020] Figure 2 is a partially enlarged view of the horizontal rotary compressor shown in Figure 1;

[0021] Figure 3 is a schematic diagram of the first sealing structure shown in Figure 2;

[0022] Figure 4 is a schematic diagram of a horizontal rotary compressor according to some embodiments of this application;

[0023] Figure 5 is a partial enlarged view of the horizontal rotary compressor shown in Figure 1;

[0024] Figure 6 is a schematic diagram of the first sealing structure shown in Figure 2;

[0025] Figure 7 is a schematic diagram of a horizontal rotary compressor according to some embodiments of this application;

[0026] Figure 8 is an enlarged view of part A circled in Figure 7;

[0027] Figure 9 is a partial enlarged view of a horizontal rotary compressor according to some other embodiments of this application;

[0028] Figure 10 is a schematic diagram of a horizontal rotary compressor according to some embodiments of this application;

[0029] Figure 11 is a partially enlarged view of the horizontal rotary compressor shown in Figure 10;

[0030] Figure 12 is a schematic diagram of a horizontal rotary compressor according to some embodiments of this application;

[0031] Figure 13 is an enlarged view of part B circled in Figure 12;

[0032] Figure 14 is a schematic diagram of the second sealing structure shown in Figure 13;

[0033] Figure 15 is a partial enlarged view of a horizontal rotary compressor according to some embodiments of this application;

[0034] Figure 16 is a partial enlarged view of a horizontal rotary compressor according to some embodiments of this application;

[0035] Figure 17 is a schematic diagram of a horizontal rotary compressor according to some embodiments of this application;

[0036] Figure 18 is an enlarged view of part C circled in Figure 17;

[0037] Figure 19 is an assembly diagram of the first sealing structure and elastic element shown in Figure 18;

[0038] Figure 20 is a cross-sectional view of the first sealing structure and elastic element shown in Figure 19;

[0039] Figure 21 is a partial schematic diagram of the first sealing structure and elastic element shown in Figure 20;

[0040] Figure 22 is a schematic diagram of the bracket, main bearing and first sealing structure in some other embodiments of the present invention;

[0041] Figure 23 is a partial schematic diagram of a horizontal rotary compressor in some embodiments of the present invention;

[0042] Figure 24 is a partial schematic diagram of the bracket shown in Figure 23;

[0043] Figure 25 is a partial schematic diagram of a horizontal rotary compressor according to some other embodiments of the present invention;

[0044] Figure 26 is a schematic diagram of a filter structure according to some embodiments of the present invention;

[0045] Figure 27 is a schematic diagram of a horizontal rotary compressor according to some embodiments of the present invention;

[0046] Figure 28 is an enlarged view of part D circled in Figure 27;

[0047] Figure 29 is a schematic diagram of a vehicle according to some embodiments of this application.

[0048] Reference numerals: Vehicle 3000, Air conditioning system 2000, Horizontal rotary compressor 1000, Housing 100, First housing 110, Second housing 120, Low-pressure chamber 130, High-pressure chamber 140, First exhaust chamber 150, Second exhaust chamber 160, Inner cavity 170, Back pressure chamber 171, Oil return chamber 172, Mounting ring 173, Fifth mounting groove 173a, Bracket 200, Intake passage 211, Third mounting groove 2111, Second perforation 212, First mounting... 2121 mounting groove, 213 guide surface, 220 center part, 230 edge part, pump body structure 300, main bearing 310, second mounting groove 312, second hub part 313, auxiliary bearing 320, first hub part 321, compression mechanism 330, first cylinder 331, second cylinder 332, compression chamber 333, inlet 333a, partition plate 334, mating cavity 335, crankshaft 340, muffler 350, muffler cavity 351, fourth mounting groove 352, limiting groove; 353, first through hole; 354, heat insulation cover; 360, positioning hole; 360a, first sealing structure; 400, first mounting part; 410, first sealing part; 420, second sealing part; 430, mating groove; 440, elastic element; 450, second sealing structure; 500, second groove; 500a, support member; 510, sealing member; 520, annular rib; 521, second mounting part; 530, third sealing part; 540, fourth sealing part; 550, etc. The structure comprises a three-seal structure 600, a fifth sealing part 610, a sixth sealing part 620, a first groove 620a, a connecting section 621, a first sealing section 622, a second sealing section 623, a protrusion 630, a filter structure 700, a first external protrusion 700a, a second external protrusion 700b, a mounting bracket 710, a first skeleton part 711, a hollow part 712, a second skeleton part 713, a filter screen 720, a second exhaust channel 810, and a third exhaust channel 820. Detailed Implementation

[0049] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0050] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0051] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0052] The horizontal rotary compressor 1000 of this application embodiment can be a single-cylinder single-exhaust compressor, a single-cylinder double-exhaust compressor, a double-cylinder compressor, etc. The application fields of the horizontal rotary compressor 1000 of this application embodiment are not limited. In addition to being used in air conditioners to provide the compression power required for cooling or heating, it can also be flexibly configured in equipment such as refrigerators, freezers, heat pump water heaters, and air conditioning systems for new energy vehicles.

[0053] In some optional embodiments, the horizontal rotary compressor 1000 is a carbon dioxide compressor, and the refrigerant used in the horizontal rotary compressor 1000 is carbon dioxide refrigerant. In this case, the horizontal rotary compressor 1000 can be used in vehicles. Carbon dioxide has a higher intake and exhaust pressure compared to traditional refrigerants when used as a refrigerant. The horizontal rotary compressor 1000 of this application embodiment can meet the sealing requirements when using carbon dioxide as a refrigerant. Furthermore, carbon dioxide refrigerant has excellent thermodynamic properties, so when the same cooling capacity is required, the volume of the compressor's compression chamber does not need to be too large, allowing for a reduction in the volume of the compression chamber and thus reducing the overall size and weight of the compressor. In addition, compressors using carbon dioxide can operate over a wider pressure range, exhibiting stable performance whether performing initial compression under low pressure or deep compression under high pressure. Therefore, the horizontal rotary compressor 1000 of this application embodiment facilitates obtaining an optimized compression ratio, has high-efficiency cooling performance when used in a refrigeration system, and can reduce energy consumption and improve energy utilization. Of course, the refrigerant used in the horizontal rotary compressor 1000 is not limited to this.

[0054] Hereinafter, with reference to the accompanying drawings, a horizontal rotary compressor 1000 according to a first aspect embodiment of the present application will be described.

[0055] As shown in Figures 1 and 4, the horizontal rotary compressor 1000 includes a second housing 120 and a pump body structure 300. The second housing 120 has an inner cavity 170 and an air outlet. The pump body structure 300 is disposed in the inner cavity 170, and a back pressure chamber 171 communicating with the air outlet is defined between the pump body structure 300 and the wall of the inner cavity 170. The pump body structure 300 includes a compression mechanism 330, a secondary bearing 320, and a silencer 350. The secondary bearing 320 is disposed in the compression mechanism 330 and the... A silencer cavity 351 is defined between the silencers 350 and between the auxiliary bearing 320 and the silencers 350. The silencer cavity 351 connects the outlet of the compression mechanism 330 and the back pressure chamber 171. The gas compressed in the compression mechanism 330 flows from the outlet through the silencer cavity 351 to the back pressure chamber 171 to be discharged from the second housing 120. The silencer cavity 351 can reduce the noise generated during the exhaust process, so that the horizontal rotary compressor 1000 can maintain a low noise level during operation and improve the sound quality. It can be understood that the second housing 120 can be the high-pressure housing of the horizontal rotary compressor 1000, and at least a portion of the inner cavity 170 can be formed as the high-pressure chamber of the horizontal rotary compressor 1000.

[0056] The second housing 120 defines an oil return chamber 172 between the secondary bearing 320 and the auxiliary bearing 320. The oil return chamber 172 is located at the end of the auxiliary bearing 320 away from the compression mechanism 330. The oil return chamber 172 can collect and store a certain amount of lubricating oil flowing back from the compression mechanism 330. The lubricating oil in the oil return chamber 172 can be transported back to the compression mechanism 330 for re-lubrication through a pump and / or pipeline, so as to realize the circulation of lubricating oil inside the horizontal rotary compressor 1000, which is beneficial to improving the utilization rate of lubricating oil. The horizontal rotary compressor 1000 also includes a third sealing structure 600. The third sealing structure 600 is an integral piece and is sealed between the auxiliary bearing 320 and the muffler 350, and between the auxiliary bearing 320 and the second housing 120, so as to separate the muffler chamber 351 from the oil return chamber 172 and the back pressure chamber 171 from the oil return chamber 172. For example, the third sealing structure 600 seals the portion between the secondary bearing 320 and the muffler 350, which can separate the muffler cavity 351 from the back pressure cavity 171 and the muffler cavity 351 from the oil return cavity 172. The third sealing structure 600 seals the portion between the secondary bearing 320 and the second housing 120, which can separate the back pressure cavity 171 from the oil return cavity 172.

[0057] As can be seen, the third sealing structure 600 can seal the unsealed position between the auxiliary bearing 320 and the silencer 350, and can also simultaneously seal the unsealed position between the auxiliary bearing 320 and the second housing 120, thus separating the silencer chamber 351 and the back pressure chamber 171 from the oil return chamber 172. The pressure inside the silencer chamber 351 is typically greater than the pressure inside the back pressure chamber 171, and the pressures in both the silencer chamber 351 and the back pressure chamber 171 are greater than those in the oil return chamber 172. This arrangement reduces the risk of air leakage and also helps to reduce the number of seals, simplifying the assembly process of the horizontal rotary compressor 1000. Therefore, the third sealing structure 600 improves the sealing efficiency inside the horizontal rotary compressor 1000, facilitates better mixing of gas and oil between different chambers, reduces internal pressure leakage, and ensures stable operation and high efficiency of the horizontal rotary compressor 1000. The return oil chamber 172, the silencer chamber 351, and the back pressure chamber 171 can all be located within the inner cavity 170. The back pressure chamber 171 can be located on the side of the pump body structure 300 facing the return oil chamber 172, and the silencer chamber 351 can be located in the part of the pump body structure 300 adjacent to the back pressure chamber 171. Thus, the positions of the return oil chamber 172, the silencer chamber 351, and the back pressure chamber 171 are relatively concentrated, which facilitates the third sealing structure 600 of the integrated structure to separate the three.

[0058] For example, the oil return chamber 172 between the second housing 120 and the auxiliary bearing 320 is a component of the lubrication system of the horizontal rotary compressor 1000. The oil return chamber 172 can communicate with the low-pressure area (e.g., the low-pressure chamber 800 described below) in the horizontal rotary compressor 1000. For example, the lubricating oil in the gap of the compression mechanism 330 can flow to the oil return chamber 172 and return to the low-pressure chamber 800. The lubricating oil in the low-pressure chamber 800 can flow with the refrigerant to enter the compression mechanism 330, and then flow from the gap of the compression mechanism 330 to the oil return chamber 172. This can form an internal circulation of lubricating oil, which is beneficial to improving the lubrication effect. The layout of the oil return chamber 172 not only ensures the full recovery and utilization of lubricating oil, but also reduces the waste of oil.

[0059] In some embodiments, as shown in Figures 2 and 5, the second housing 120 has a mounting ring 173, the secondary bearing 320 has a first hub portion 321 passing through the muffler 350, the mounting ring 173 is sleeved on the outside of the first hub portion 321, and the mounting ring 173 is spaced apart from the muffler 350; the third sealing structure 600 includes a fifth sealing portion 610 and a sixth sealing portion 620 that are respectively formed as annular and connected, the fifth sealing portion 610 seals between the muffler 350 and the first hub portion 321, and the sixth sealing portion 620 seals between the mounting ring 173 and the first hub portion 321.

[0060] As can be seen, the muffler 350 has a first through hole 354 for the first hub portion 321 to pass through. The fifth sealing part 610 seals between the hole wall of the first through hole 354 and the outer peripheral wall of the first hub portion 321 to achieve radial sealing between the muffler 350 and the first hub portion 321. The mounting ring 173 is sleeved on the outside of the first hub portion 321, and the sixth sealing part 620 seals between the inner peripheral wall of the mounting ring 173 and the outer peripheral wall of the first hub portion 321 to achieve radial sealing between the second housing 120 and the first hub portion 321. Thus, the sealing methods of the fifth sealing part 610 and the sixth sealing part 620 have a certain consistency, which facilitates the assembly of the third sealing structure 600 and helps to improve the assembly efficiency of the horizontal rotary compressor 1000.

[0061] Furthermore, since the muffler 350 and the mounting ring 173 are spaced apart, the gap between the muffler 350 and the mounting ring 173 is connected to the back pressure chamber 171. This allows the gas pressure at the gap between the muffler 350 and the mounting ring 173 to exert a certain force on the third sealing structure 600, so that the third sealing structure 600 fits more tightly against the sealing surface, which is beneficial to improving the sealing performance.

[0062] In some embodiments, as shown in Figures 2 and 5, a fourth mounting groove 352 is formed between the muffler 350 and the first hub portion 321, and a fifth sealing portion 610 is disposed in the fourth mounting groove 352. The fourth mounting groove 352 can limit the movement range of the fifth sealing portion 610 so that the fifth sealing portion 610 fits tightly against the surface to be sealed, which is beneficial to improving the sealing reliability and facilitates the pre-positioning of the fifth sealing portion 610, making assembly convenient; and / or, a protrusion 630 is provided on the inner and / or outer peripheral walls of the fifth sealing portion 610. The protrusion 630 can be arranged around the first hub portion 321 and tightly abut against the muffler 350 or the first hub portion 321, which is beneficial to improving the sealing performance of the third sealing structure 600.

[0063] When a fourth mounting groove 352 is formed between the muffler 350 and the first hub portion 321, the fourth mounting groove 352 can be formed on the muffler 350, or the fourth mounting groove 352 can be formed on the first hub portion 321, or the muffler 350 and the first hub portion 321 can each have a groove formed, and the grooves on the muffler 350 and the first hub portion 321 can be joined together to form the fourth mounting groove 352. When a protrusion 630 is provided on the fifth sealing portion 610, there can be one or more protrusions 630 located on the inner or outer side of the fifth sealing portion 610, and multiple protrusions 630 located on the same side of the fifth sealing portion 610 can be arranged sequentially along the axial direction of the fifth sealing portion 610.

[0064] In some embodiments, as shown in Figures 2 and 5, a protrusion 630 is provided on the inner and / or outer peripheral walls of the fifth sealing portion 610, and a limiting groove 353 is formed on the groove wall of the fourth mounting groove 352. The protrusion 630 cooperates with the limiting groove 353 to improve the positional stability of the fifth sealing portion 610, reduce the displacement of the third sealing structure 600, and improve sealing reliability. Exemplarily, the protrusion 630 is provided on the outer peripheral wall of the fifth sealing portion 610, and a limiting groove 353 is formed on the inner peripheral wall of the muffler 350; of course, if the protrusion 630 is provided on the inner peripheral wall of the fifth sealing portion 610, a limiting groove 353 is formed on the outer peripheral wall of the first hub portion 321. It is understood that the cross-sectional shape of the protrusion 630 is not specifically limited in this embodiment; as shown in Figures 3 and 6, the cross-sectional shape of the protrusion 630 is triangular, square, trapezoidal, or semi-circular, etc.

[0065] In some embodiments, as shown in Figures 2 and 5, a protrusion 630 is provided on the outer peripheral wall of the fifth sealing part 610. The end face of the fifth sealing part 610 away from the sixth sealing part 620 extends obliquely from the inside out toward the direction close to the sixth sealing part 620. The refrigerant in the silencing cavity 351 acts on the end face of the fifth sealing part 610 through the gap between the muffler 350 and the first hub part 321, generating a compressive force perpendicular to the end face, so that the end of the fifth sealing part 610 is more tightly against the first hub part 321. At the same time, the provision of the protrusion 630 enables the fifth sealing part 610 to be tightly against the muffler 350, thereby facilitating the third sealing structure 600 to be more reliably sealed between the muffler 350 and the first hub part 321.

[0066] In some embodiments, as shown in Figures 2 and 5, a fifth mounting groove 173a is formed between the mounting ring 173 and the first hub portion 321. A sixth sealing portion 620 is disposed in the fifth mounting groove 173a. The fifth mounting groove 173a can limit the movement range of the sixth sealing portion 620 so that the sixth sealing portion 620 fits tightly against the surface to be sealed, which is beneficial to improving the sealing reliability. At the same time, it is convenient to achieve the pre-positioning of the sixth sealing portion 620 and facilitates assembly. The sixth sealing portion 620 includes a connecting section 621, a first sealing section 622 and a second sealing section 623. The first sealing section 622 abuts against the first hub portion 321 and is connected to the fifth sealing portion 610. The second sealing section 623 abuts against the mounting ring 173. The connecting section 621 connects between the first sealing section 622 and the second sealing section 623 so that the connecting section 621, the first sealing section 622 and the second sealing section 623 define a first groove 620a with the opening facing the muffler 350.

[0067] Therefore, there is a certain gap between the first sealing section 622 and the second sealing section 623. This gap can allow for a certain deformation space between them to make the sixth sealing part 620 compressible, so that the first sealing section 622 and the second sealing section 623 respectively correspond tightly to and abut against the first hub part 321 and the mounting ring 173. In addition, the groove opening of the first groove 620a is set towards the muffler 320, so the first groove 620a is connected to the back pressure chamber 171. The high-pressure gas in the back pressure chamber 171 can act on the groove wall of the first groove 620a. The high-pressure gas can exert a force on the first sealing section 622 and the second sealing section 623 away from each other, so that the first sealing section 622 abuts more tightly against the first hub part 321 and the second sealing section 623 abuts more tightly against the mounting ring 173, thereby improving the sealing performance of the third sealing structure 600.

[0068] It is understood that the fifth mounting groove 173a may be formed on the mounting ring 173, or the fifth mounting groove 173a may be formed on the first hub portion 321, or the grooves of the muffler 350 and the first hub portion 321 may be joined together to form the fifth mounting groove 173a.

[0069] In some embodiments, as shown in Figures 2 and 5, the side of the connecting segment 621 facing away from the first sealing segment 622 and the second sealing segment 623 abuts against the groove wall of the fifth mounting groove 173a. The groove wall of the fifth mounting groove 173a can then provide some support to the third sealing structure 600, limiting its displacement and facilitating a seal between the connecting segment 621 and the corresponding groove wall of the fifth mounting groove 173a. Furthermore, the high-pressure gas in the back pressure chamber 171 can act on the groove wall of the first groove 620a, applying force to the connecting segment 621 to make it more tightly abut against the corresponding groove wall of the first mounting groove 113a, thus improving the sealing performance of the third sealing structure 600. Simultaneously, it also helps to mitigate accidental displacement of the third sealing structure 600 under high-pressure environments, improving the compatibility of the first sealing structure 700 with high-pressure environments.

[0070] In some embodiments, as shown in Figures 7, 10, and 12, the horizontal rotary compressor 1000 further includes a filter structure 700. The filter structure 700 is located upstream of the inlet 333a of the compression mechanism 330. The filter structure 700 can filter the refrigerant flowing to the inlet 333a of the compression mechanism 330, so that the refrigerant flows to the compression mechanism 330 for compression after being filtered by the filter structure 700. Therefore, by setting the filter structure 700, the risk of impurities entering the compression mechanism 330 is reduced, ensuring the cleanliness of the internal environment and the purity of the working medium of the compression mechanism 330, reducing the maintenance cost and failure rate of the horizontal rotary compressor 1000, and making it suitable for scenarios with high sensitivity to impurities. Furthermore, for the high-precision compression mechanism 330, it improves the problem of impurities entering the compression mechanism 330 and causing blockage, thus improving the operational reliability and stability of the horizontal rotary compressor 1000.

[0071] The main function of the filter structure 700 is to act as a barrier, intercepting impurities in the gas before it enters the compression unit 330. This pre-filtration mechanism ensures that only purified refrigerant can enter the compression unit 330 for compression, thereby avoiding contamination of the compressed gas quality by impurities. It also reduces potential damage to the compression unit 330, such as wear and stalling, and extends the service life of the horizontal rotary compressor 1000.

[0072] Therefore, the number and specific location of the filter structure 700 can be flexibly adjusted according to the requirements. There can be one or more filter structures 700. When there are multiple filter structures 700, they can be arranged sequentially along the airflow direction so that the refrigerant can be filtered multiple times before entering the inlet 333a of the compression mechanism 330. Taking filter structure 700 as an example: filter structure 700 is installed inside the horizontal rotary compressor 1000 (for example, filter structure 700 is installed inside the second housing 120 or inside the first housing 110 described later), which is beneficial for making reasonable use of internal space and reducing the space occupied by the horizontal rotary compressor 1000; filter structure 700 can be directly installed at the air inlet of the horizontal rotary compressor 1000; or, filter structure 700 can be installed at the inlet 333a of the compression mechanism 330; or, filter structure 700 can be located downstream of the air inlet of the horizontal rotary compressor 1000 and upstream of the inlet 333a of the compression mechanism 330 (for example, filter structure 700 is installed inside the low-pressure chamber 130 described later, or filter structure 700 is installed at the air intake channel 211 described later).

[0073] In related technologies, the filter structure is located on the liquid receiver. For compressors without a liquid receiver, it is difficult to improve the wear and stall problems of the compression mechanism. Obviously, the setting of the filter structure 700 in the above example makes the horizontal rotary compressor 1000 suitable for scenarios without a liquid receiver.

[0074] As shown in Figures 8, 9, 11, 15 and 16, the filter structure 700 includes a mounting frame 710 and a filter screen 720. The filter screen 720 is mounted on the mounting frame 710 and is formed into a cylindrical structure. The two axial ends of the filter screen 720 are an upstream end 720a and a downstream end 720b, respectively. The mounting frame 710 closes the downstream end 720b of the filter screen 720.

[0075] As can be seen, the filter structure 700 can be installed through the mounting bracket 710, and the two ends of the filter screen 720 are open to form openings. The opening at the upstream end 720a allows airflow to flow into the filter screen 720, and the mounting bracket 710 closes the opening at the downstream end 720b. The airflow into the filter screen 720 can pass through the filter screen 720 in a roughly radial direction and be filtered by the filter screen 720. Thus, the airflow at the opening at the upstream end 720a can flow roughly in the axial direction of the filter screen 720, and the refrigerant passing through the filter screen 720 will not flow directly towards the filter screen 720, which helps to reduce the impact of the airflow on the filter screen 720 during the process of flowing through the filter screen 720. Furthermore, since the mounting bracket 710 encloses the downstream end 720b of the filter screen 720, a portion of the impact of the airflow on the filter structure 700 is applied to the mounting bracket 710. This allows the mounting bracket 710 to withstand this impact, further reducing the impact on the filter screen 720 and improving reliability. It also helps to reduce the installation requirements of the filter screen 720, eliminating the need for the filter screen 720 to be tightly fitted with other components to ensure that all refrigerant flowing to the compression mechanism 330 passes through the filter screen 720 before reaching the compression mechanism 330. This simplifies the installation of the filter structure 700.

[0076] In this embodiment, the connection method between the mounting bracket 710 and the filter screen 720 is not specifically limited. For example, the mounting bracket 710 and the filter screen 720 can be connected by injection molding or welding. The axial direction of the filter screen 720 can be parallel to the axial direction of the horizontal rotary compressor 1000 (i.e., the axial direction of the pump body structure 300, the axial direction of the crankshaft 340, and the extension direction of the central axis L in Figures 1, 4, 7, 10, and 12) (as shown in Figures 8, 9, 11, 15, and 16), or the axial direction of the filter screen 720 can also form a non-zero angle with the axial direction of the horizontal rotary compressor 1000.

[0077] In some embodiments, as shown in Figures 8, 9, 11, 15, and 16, the mounting bracket 710 includes a first skeleton portion 711, a perforated portion 712, and a second skeleton portion 713 connected sequentially along the axial direction of the filter screen 720. The first skeleton portion 711 is formed into a ring structure, the filter screen 720 is disposed in the perforated portion 712, and the two axial ends of the filter screen 720 are respectively connected to the first skeleton portion 711 and the second skeleton portion 713. The second skeleton portion 713 closes one axial end of the filter screen 720. Thus, the internal space of the first skeleton portion 711 can correspond to the inlet of the filter structure 700, which facilitates the filter structure 700 to filter all airflow flowing towards the inlet 333a of the compression mechanism 330. Moreover, the mounting bracket 710 can support the filter screen 720 as a whole to maintain the shape of the filter screen 720, which helps to improve the reliability of the filter structure 700.

[0078] In this embodiment, the structure of the perforated portion 712 is not specifically limited. It is sufficient that the perforated portion 712 has a channel connecting its interior and exterior, so that the airflow entering the filter screen 720 can pass through the filter screen 720 and smoothly exit the filter structure 700. For example, the perforated portion 712 may include multiple connecting rods spaced circumferentially along the first skeleton portion 711. The two ends of each connecting rod are respectively connected to the first skeleton portion 711 and the second skeleton portion 713. The space between two adjacent connecting rods can form a channel connecting the interior and exterior of the perforated portion 712. The airflow entering the filter screen 720 can pass through this channel and exit the filter screen 720. The perforated portion 712 has a simple structure, facilitates reliable support for the filter screen 720, and has relatively little obstruction to airflow.

[0079] In some embodiments, as shown in Figures 8, 9, 11, 15, and 16, the pump body structure 300 further includes a main bearing 310, which is disposed on the side of the compression mechanism 330 opposite to the secondary bearing 320, and the compression mechanism 330 is sandwiched between the main bearing 310 and the secondary bearing 320; the horizontal rotary compressor 1000 includes a bracket 200, which is disposed on the side of the second housing 120 in the axial direction of the pump body structure 300, and the bracket 200 is connected to the main shaft. Corresponding to 310, an air intake channel 211 is formed on the bracket 200 and the main bearing 310. A part of the air intake channel 211 can be formed on the bracket 200 and another part can be formed on the main bearing 310. The compression mechanism 330 has a mating cavity 335. The mating cavity 335 connects the air intake channel 211 and the inlet 333a of the compression mechanism 330. Gas flows through the air intake channel 211 to the mating cavity 335 and then to the inlet 333a of the compression mechanism 330.

[0080] The filter structure 700 passes through the air intake channel 211 and the mating cavity 335. The filter screen 720 is opposite to the inlet 333a of the compression mechanism 330 (the inlet 333a that is connected to the mating cavity 335) along the radial direction of the secondary bearing 320 (i.e. the radial direction of the pump body structure 300). The peripheral wall of the filter screen 720 is opposite to the inlet 333a.

[0081] Therefore, it is beneficial to reduce the obstruction of the airflow at the inlet 333a by the mounting bracket 710, and it is not easy to excessively reduce the airflow area due to the setting of the filter structure 700, and it will not excessively increase the airflow resistance, so as to ensure the smooth flow of airflow. In particular, when the mounting bracket 710 includes the first skeleton part 711, the hollow part 712 and the second skeleton part 713, the second skeleton part 713 is located in the mating cavity 335 and is staggered from the inlet 333a, so that the second skeleton part 713 will not block the airflow at the inlet 333a, nor will it block the airflow in the air intake channel 211 and the mating cavity 335.

[0082] It is understood that the compression mechanism 330 includes at least one cylinder, each cylinder having a compression chamber 333, and an inlet 333a serving as the entrance to the compression chamber 333. For example, each cylinder may contain a roller and a vane. The roller is mounted on the eccentric portion of the crankshaft to be driven to rotate eccentrically by the crankshaft. The vane is movably disposed in a vane groove and abuts against the outer peripheral wall of the roller, thereby dividing the compression chamber into an intake chamber side and an exhaust chamber side. When the compression mechanism 330 includes multiple cylinders, there are multiple inlets 333a, and the mating chamber 335 may communicate with at least one inlet 333a.

[0083] For example, as shown in Figures 8, 9, 11, 15 and 16, the compression mechanism 330 includes a first cylinder 331, a second cylinder 332 and a partition plate 334. The mating cavity 335 passes through the first cylinder 331 and the partition plate 334 and extends into the second cylinder 332, so that the mating cavity 335 is connected to the compression cavity 333 of the first cylinder 331 and also to the compression cavity 333 of the second cylinder 332. The inlet 333a of the first cylinder 331 and the inlet 333a of the second cylinder 332 are both radially opposite to the filter screen 720, so that the refrigerant filtered by the filter structure 700 can be distributed to the first cylinder 331 and the second cylinder 332. For example, the mounting bracket 710 includes a first skeleton part 711, a hollow part 712, and a second skeleton part 713. The first skeleton part 711 does not extend into the mating cavity 335. At least a portion of the hollow part 712 and the second skeleton part 713 are located inside the mating cavity 335. Since the filter screen 720 is opposite to the inlet 333a, the first skeleton part 711 and the second skeleton part 713 are both offset from the inlet 333a.

[0084] In some embodiments, as shown in Figures 8, 13, 15, and 16, a third mounting groove 2111 is formed on the wall of the bracket 200 corresponding to the air intake channel 211. The third mounting groove 2111 passes through one end of the bracket 200 facing the main bearing 310. The mounting bracket 710 is limited and fitted into the third mounting groove 2111 to restrict the axial movement of the filter structure 700, thereby improving the installation reliability of the filter structure 700. Moreover, the filter structure 700 can be inserted into the third mounting groove 2111 along the direction of the main bearing 310 toward the bracket 200, thereby reducing the length of the filter structure 700 when fitted into the bracket 200, which is beneficial to improving the installation convenience of the filter structure 700. Exemplarily, the mounting bracket 710 includes a first skeleton portion 711, a hollow portion 712, and a second skeleton portion 713. The first skeleton portion 711 is limited and fitted into a fourth mounting groove 352, and the filter screen 720 and the hollow portion 712 pass through the main bearing 310.

[0085] Of course, the installation configuration of the filter structure 700 is not limited to this. In some other embodiments, as shown in FIG9, the mounting bracket 710 has a first outward protrusion 700a, which is sandwiched between the bracket 200 and the main bearing 310. The first outward protrusion 700a can be formed by a portion of the outer peripheral wall of the mounting bracket 710 protruding radially outward along the filter screen 720. For example, the first outward protrusion 700a can be formed as a rib extending in an annular shape along the circumference of the filter screen 720. Thus, the axial movement of the filter structure 700 can also be restricted, achieving reliable installation of the filter structure 700.

[0086] It is understood that the first protrusion 700a can be located at the end of the mounting bracket 710 in the axial direction of the filter screen 720, or the first protrusion 700a and the two ends of the mounting bracket 710 in the axial direction of the filter screen 720 can be spaced apart respectively; at least one of the bracket 200 and the main bearing 310 is fixedly connected to the first protrusion 700a, or neither the bracket 200 nor the main bearing 310 is connected to the first protrusion 700a. In this case, the first protrusion 700a can be clamped and fixed by the connecting force of the fixed connection between the bracket 200 and the main bearing 310, so as to realize the installation of the filter structure 700.

[0087] For example, the first protrusion 700a is located at the end of the mounting bracket 710 in the axial direction of the filter screen 720. Since the filter screen 720 is opposite to the inlet 333a of the compression chamber 333, the first protrusion 700a is located at the end of the mounting bracket 710 away from the downstream end 720b of the filter screen 720. At this time, the filter structure 700 can pass through the part of the main bearing 310 corresponding to the air intake channel 211 and the mating cavity 335, but not through the part of the bracket 200 corresponding to the air intake channel 211. For example, the mounting bracket 710 includes a first skeleton part 711, a hollow part 712 and a second skeleton part 713 connected sequentially along the axial direction of the filter screen 720. The first protrusion 700a is formed at the end of the first skeleton part 711 away from the second skeleton part 713. The filter screen 720 and the hollow part 712 pass through the main bearing 310. Of course, the first protrusion 700a can also be spaced between the two ends of the mounting bracket 710 in the axial direction of the filter screen 720. In this case, the filter structure 700 can be inserted into the part of the bracket 200 corresponding to the air intake channel 211, the part of the main bearing 310 corresponding to the air intake channel 211, and the mating cavity 335.

[0088] In some embodiments, as shown in Figures 10 and 11, a heat insulation cover 360 is provided on the side of the bracket 200 facing away from the main bearing 310. This heat insulation cover 360 facilitates the separation of at least a portion of the uncompressed low-temperature refrigerant from the high-temperature bracket 200, which helps reduce the heat transfer from the bracket 200 towards the low-temperature refrigerant, thereby reducing suction heat loss and improving the energy efficiency of the horizontal rotary compressor 1000. The mounting bracket 710 is fixedly connected to the heat insulation cover 360, through which the filter structure 700 is installed; and / or, the filter structure 700 has a second outward protrusion 700b sandwiched between the heat insulation cover 360 and the bracket 200. The second outward protrusion 700b can be formed by a portion of the outer peripheral wall of the mounting bracket 710 protruding radially outward along the filter screen 720. For example, the second outward protrusion 700b can be formed as a ring-shaped rib extending circumferentially along the filter screen 720. Thus, reliable installation of the filter structure 700 can also be achieved, and the installation method is flexible. For example, the thermal conductivity of the heat shield 360 may be less than that of the bracket 200.

[0089] It is understood that the second protrusion 700b can be located at the end of the mounting bracket 710 in the axial direction of the filter screen 720, or the second protrusion 700b and the two ends of the mounting bracket 710 in the axial direction of the filter screen 720 can be spaced apart respectively; at least one of the heat insulation cover 360 and the bracket 200 is fixedly connected to the second protrusion 700b, or neither the heat insulation cover 360 nor the bracket 200 is connected to the second protrusion 700b. In this case, the second protrusion 700b can be clamped and fixed by the connection force of the fixed connection between the heat insulation cover 360 and the bracket 200, so as to realize the installation of the filter structure 700.

[0090] For example, the second protrusion 700b is located at the end of the mounting bracket 710 in the axial direction of the filter screen 720. Since the filter screen 720 is opposite to the inlet 333a of the compression chamber 333, the second protrusion 700b is located at the end of the mounting bracket 710 away from the downstream end 720b of the filter screen 720. At this time, the filter structure 700 can pass through the part of the main bearing 310 corresponding to the air intake channel 211 and the mating cavity 335, but does not pass through the part of the bracket 200 corresponding to the air intake channel 211. For example, the mounting bracket 710 includes a first skeleton part 711, a hollow part 712 and a second skeleton part 713 connected sequentially along the axial direction of the filter screen 720. The second protrusion 700b is formed at the end of the first skeleton part 711 away from the second skeleton part 713. Of course, the first protrusion 700a can also be spaced between the two ends of the mounting bracket 710 in the axial direction of the filter screen 720. In this case, the filter structure 700 can be inserted into the part of the bracket 200 corresponding to the air intake channel 211, the part of the main bearing 310 corresponding to the air intake channel 211, and the mating cavity 335.

[0091] Furthermore, when the mounting bracket 710 is fixedly connected to the heat insulation cover 360, at least a portion of the mounting bracket 710 can be integrally formed into the heat insulation cover 360, or the mounting bracket 710 and the heat insulation cover 360 are separate parts and connected by assembly means.

[0092] For the various installation schemes of the filter structure 700, whether through the fourth mounting groove 352, the first external protrusion 700a, the heat insulation cover 360, or the second external protrusion 700b, in the direction from the secondary bearing 320 to the main bearing 310, it is easy to ensure that the filter structure 700 does not exceed the end face of the support 200 away from the compression mechanism 330, or that the size of the filter structure 700 exceeding the end face of the support 200 away from the compression mechanism 330 can be controlled. This helps to reduce the space occupied by the filter structure 700 on the side of the support 200 away from the compression mechanism 330 (e.g., the low-pressure chamber 130 mentioned later). If the horizontal rotary compressor 1000 is an electric compressor, it is easy to provide sufficient space for the motor structure in the low-pressure chamber 130, while the motor structure is less likely to interfere with the filter structure 700.

[0093] In some embodiments, as shown in FIG11, a heat shield 360 is provided on the side of the bracket 200 opposite to the main bearing 310. A positioning hole 360a is formed on the heat shield 360. An end of the mounting bracket 710 extends out of the air intake channel 211, and the aforementioned end of the mounting bracket 710 is positioned and engaged with the positioning hole 360a. This facilitates rapid assembly and positioning of the mounting bracket 710 and the heat shield 360, improving assembly efficiency. Exemplarily, the mounting bracket 710 includes a first skeleton portion 711, a hollow portion 712, and a second skeleton portion 713. The first skeleton portion 711 extends out of the air intake channel 211 in a direction away from the main bearing 310, and the end of the first skeleton portion 711 away from the second skeleton portion 713 engages with the positioning hole 360a.

[0094] In some embodiments, as shown in Figures 12-17, the pump body structure 300 further includes a main bearing 310, which is located on the side of the compression mechanism 330 away from the auxiliary bearing 320. The horizontal rotary compressor 1000 also includes a bracket 200, which is located at one end of the second housing 120 in the axial direction of the pump body structure 300. The main bearing 310 is sandwiched between the bracket 200 and the compression mechanism 330. The main bearing 310 can serve as a component that bears radial and axial loads, supporting the rotational movement of the compression mechanism 330 and facilitating the stability and reliability of the compression mechanism 330 under high-speed operation. A first exhaust chamber 150 is defined between the bracket 200 and the main bearing 310. The first exhaust chamber 150 connects the silencing chamber 351 and the back pressure chamber 171. The refrigerant in the silencing chamber 351 can flow through the first exhaust chamber 150 to the back pressure chamber 171 to rectify the exhaust.

[0095] The support 200 and main bearing 310 have an intake channel 211, which connects to the inlet 333a of the compression mechanism 330. The horizontal rotary compressor 1000 also includes a second sealing structure 500, which is located between the support 200 and the main bearing 310 and surrounds the intake channel 211 to separate the first exhaust chamber 150 from the intake channel 211, thus preventing gas from being discharged through the intake channel 211 and avoiding leakage. This achieves a static seal for the intake of the horizontal rotary compressor 1000, ensuring that gas can be smoothly drawn into the compression mechanism 330 through the intake channel 211 and discharged to the back pressure chamber 17 through the first exhaust chamber 150. 1. In order to improve the problems of efficiency reduction and pressure fluctuation of the horizontal rotary compressor 1000, and compared with the direct contact sealing method used in some technologies, the above arrangement also helps to reduce the processing requirements of the sealing position between the bracket 200 and the main bearing 310, and reduce the processing difficulty; and / or, the horizontal rotary compressor 1000 also includes a first sealing structure 400, which is disposed between the main bearing 310 and the bracket 200, and the first sealing structure 400 is arranged around the crankshaft 340 of the horizontal rotary compressor 1000 to separate the first exhaust chamber 150 from the side of the bracket 200 away from the main bearing 310, for example, to separate the first exhaust chamber 150 from the low-pressure chamber 130 described later, thereby improving the leakage problem.

[0096] In the above scheme, the setting of the air intake channel 211 can realize the reliable air intake of the horizontal rotary compressor 1000, and the refrigerant does not need to flow through the external space of the second housing 120, which facilitates the simplification of the sealing setting; of course, in other embodiments, the second housing 120 is provided with a connecting pipe, and the air intake of the horizontal rotary compressor 1000 is connected to the inlet 333a of the compression mechanism 330 through the connecting pipe.

[0097] In some embodiments, as shown in Figures 12-16, the horizontal rotary compressor 1000 includes a second sealing structure 500 and a filter structure 700. The filter structure 700 is disposed at the intake channel 211. For example, a part of the filter structure 700 may be located inside the intake channel 211 to filter the refrigerant flowing to the inlet 333a of the compression mechanism 330. In this case, the second sealing structure 500 is sleeved outside the filter structure 700. The filter structure 700 can limit the radial displacement of the second sealing structure 500 to a certain extent, which is beneficial to improving the installation reliability and sealing performance of the second sealing structure 500.

[0098] Furthermore, the second sealing structure 500 is sleeved outside the mounting bracket 710. The mounting bracket 710 can better limit the second sealing structure 500 relative to the filter screen 720, so as to further improve the installation stability of the second sealing structure 500.

[0099] For example, as shown in Figures 13, 15, and 16, the mounting bracket 710 includes a first skeleton portion 711, a hollow portion 712, and a second skeleton portion 713. A filter screen 720 is disposed in the hollow portion 712, and the two axial ends of the filter screen 720 are respectively connected to the first skeleton portion 711 and the second skeleton portion 713. A second sealing structure 500 is sleeved outside the first skeleton portion 711, or the second sealing structure 500 is sleeved outside the hollow portion 712. For example, when the first skeleton portion 711 is limited and fitted into the third mounting groove 2111 on the bracket 200, if the first skeleton portion 711 does not extend into the main bearing 310, the second sealing structure 500 is sleeved outside the hollow portion 712 (as shown in Figure 13); if the first skeleton portion 711 extends into the main bearing 310, the second sealing structure 500 is sleeved outside the first skeleton portion 711 (as shown in Figures 15 and 16).

[0100] In some embodiments, as shown in Figures 13, 15 and 16, a second mounting groove 312 is formed between the bracket 200 and the main bearing 310, surrounding the air intake channel 211. The second sealing structure 500 is disposed in the second mounting groove 312. The second mounting groove 312 can limit the movement range of the second sealing structure 500 so that the second sealing structure 500 can fit tightly against the surface that needs to be sealed, which is beneficial to improving the sealing performance. At the same time, it is convenient to achieve the pre-positioning of the second sealing structure 500 and facilitates assembly.

[0101] Optionally, the second mounting groove 312 may be formed on the main bearing 310 (as shown in Figures 13, 15 and 16), or the second mounting groove 312 may be formed on the bracket 200, or the main bearing 310 may have a first groove and the bracket 200 may have a second groove, with the first and second grooves joined together to form the second mounting groove 312.

[0102] For example, as shown in Figure 16, the second mounting groove 312 communicates with the first exhaust chamber 150. The second sealing structure 500 is a single piece and includes a second mounting portion 530, a third sealing portion 540, and a fourth sealing portion 550, which are respectively formed in annular shapes. The third sealing portion 540 and the fourth sealing portion 550 are both connected to the outer peripheral wall of the second mounting portion 530. The fifth sealing portion 610 and the sixth sealing portion 620 are spaced apart along the axial direction of the second mounting portion 530, so that a second groove 500a is defined between the second mounting portion 530, the third sealing portion 540, and the fourth sealing portion 550. The third sealing portion 540 abuts against the bracket 200, and the fourth sealing portion 550 abuts against the main bearing 310. Thus, there is a certain gap between the third sealing portion 540 and the fourth sealing portion 550. This gap can allow for a certain deformation space between them to make the third sealing structure 600 compressible, so that the third sealing portion 540 and the fourth sealing portion 550 respectively tightly abut against the bracket 200 and the main bearing 310.

[0103] Furthermore, since the second mounting groove 312 is connected to the first exhaust chamber 150, the opening of the second groove 500a can be set towards the position where the second mounting groove 312 and the first exhaust chamber 150 are connected. The high-pressure gas in the first exhaust chamber 150 can act on the groove wall of the second groove 500a. The high-pressure gas can apply a force away from each other to the third sealing part 540 and the fourth sealing part 550, so that the third sealing part 540 is more tightly pressed against the bracket 200 and the fourth sealing part 550 is more tightly pressed against the main bearing 310, thereby improving the sealing performance of the second sealing structure 500.

[0104] Optionally, an elastic element (such as a spring) may be provided in the second groove 500a. The elastic element can apply a force away from each other to the third sealing part 540 and the fourth sealing part 550 to improve the sealing performance. Of course, the elastic element may not be provided in the second groove 500a.

[0105] For example, as shown in Figures 13-15, the second sealing structure 500 includes a support member 510 and a sealing member 520. The support member 510 is an annular structure, and the sealing member 520 is completely wrapped around the support member 510. Both the support member 510 and the sealing member 520 are arranged around the air intake channel 211, so the support member 510 is embedded in the sealing member 520 to improve the bonding strength between the support member 510 and the sealing member 520. The elastic modulus of the support member 510 is greater than that of the sealing member 520. Therefore, the support member 510 can provide support for the seal 520. The support member 510 can not only limit the range of movement of the seal 520, but also ensure that the seal 520 can maintain a certain position and shape when subjected to pressure through its shape and size, which helps to reduce the risk of displacement and excessive deformation of the second sealing structure 500. It can be seen that the support member 510 can serve as the skeleton of the second sealing structure 500. Its high elasticity module can make the seal 520 easy to maintain its shape and position stability when subjected to external force or vibration, and it is not easy to undergo excessive deformation. This stability is of great significance in preventing the seal 520 from shifting or failing under extreme working conditions.

[0106] Some technologies use O-rings alone as the sealing body, but due to insufficient support and restraint, they are prone to displacement or excessive deformation under external forces, leading to seal failure. Other technologies use an O-ring plus a retainer ring to restrict the movement of the O-ring; however, this sealing method is more complex, and the reliability of the O-ring and retainer ring fit needs improvement. In the solution described in this application, the seal 520 is completely wrapped around the support 510, forming a soft and elastic sealing layer. This allows the seal 520 to better adapt to the sealing surface, achieving a tighter fit, and the seal 520 is less likely to detach from the support 510.

[0107] To better adapt to complex sealing surface shapes or meet specific sealing requirements, the cross-sectional shape of the support 510 can be designed as an irregular shape. These irregular shapes can be customized according to the specific contour of the sealing surface to ensure that the seal 520 can fit tightly and provide an effective seal. In some alternative embodiments, the cross-sectional shape of the support 510 can be a circle, a semi-circle, a triangle, a rectangle, or other polygonal or irregular shapes.

[0108] Optionally, the support component 510 can be made of metal or plastic, and the seal 520 can be made of rubber. Metal components offer high strength, good wear resistance, and excellent thermal stability, maintaining stable shape and performance under various operating conditions, providing a solid support foundation for the seal 520. Furthermore, metal components have good machinability, allowing for precise dimensional and shape design as needed. On the other hand, plastic components offer advantages such as light weight, low cost, and corrosion resistance, making them particularly suitable for the design of the horizontal rotary compressor 1000, where weight and cost are critical. Additionally, plastic components can be used in injection molding and other processes to achieve complex shape designs, further enhancing the adaptability of the second sealing structure 500. The seal 520, being made of rubber, effectively prevents gas leakage. This is because rubber components possess excellent elasticity, sealing properties, and corrosion resistance. In the horizontal rotary compressor 1000, the seal 520 can fit tightly between the support 200 and the main bearing 310, thereby preventing gas leakage.

[0109] In some embodiments, as shown in Figures 13 and 14, at least one end of the seal 520 has an annular rib 521 at its axial ends. The annular rib 521 can be arranged around the intake passage 211 and closely abuts against the bracket 200 or the main bearing 310, which helps to improve the sealing performance of the second sealing structure 500. Optionally, the axial direction of the seal 520 (i.e., the axial direction of the second sealing structure 500) can be parallel to the axial direction of the horizontal rotary compressor 1000. Of course, in other examples, the axial direction of the seal 520 can also form a non-zero angle with the axial direction of the horizontal rotary compressor 1000. It can be understood that for the axial end of the seal 520 where the annular rib 521 is provided, there can be one or more annular ribs 521. Multiple annular ribs 521 located at the same axial end of the seal 520 can be arranged coaxially in sequence along the radial direction of the seal 520.

[0110] Optionally, as shown in Figure 14, the annular rib 521 is offset from the support member 510 in the radial direction of the seal 520. Therefore, the axial thickness of the portion of the seal 520 corresponding to the annular rib 521 is greater than the circumferential thickness of the portion corresponding to the support member 510. The portion of the seal 520 corresponding to the annular rib 521 experiences a larger compressive force. The radial offset between the annular rib 521 and the support member 510 facilitates the reduction of the compressive force between them. Under the same compression, this helps to decrease the compressive force on both the support member 510 and the seal 520, thus improving the stress distribution on the second sealing structure 500.

[0111] In some embodiments, as shown in Figures 1, 17, and 18, a first mounting groove 2121 is formed between the main bearing 310 and the bracket 200. A first sealing structure 400 is disposed in the first mounting groove 2121, which also surrounds the crankshaft 340 to improve air leakage and limit the movement range of the first sealing structure 400, thereby enhancing installation reliability and convenience. It can be understood that the first mounting groove 2121 can be formed on the main bearing 310, or on the bracket 200 (as shown in Figure 18), or a third groove is formed on the main bearing 310, and a fourth groove is formed on the bracket 200, with the third and fourth grooves joined together to form the first mounting groove 2121.

[0112] The first sealing structure 400 is an integral piece and includes a first mounting part 410, a first sealing part 420 and a second sealing part 430, which are respectively formed in annular shape. The first sealing part 420 and the second sealing part 430 are both connected to the first mounting part 410 and are spaced apart, so that a mating groove 440 is defined between the first mounting part 410, the first sealing part 420 and the second sealing part 430. The groove opening of the mating groove 440 is set towards the position where the first mounting groove 2121 communicates with the first exhaust chamber 150. The first sealing part 420 abuts against the bracket 200 and the second sealing part 430 abuts against the main bearing 310.

[0113] For example, the first sealing part 420 directly contacts the bracket 200, and the second sealing part 430 directly contacts the main bearing 310, achieving a static seal between the bracket 200 and the main bearing 310. Since the main bearing 310 bears significant radial and axial loads during the operation of the horizontal rotary compressor 1000 and moves along with the rotation of the crankshaft 340, it exerts a certain compressive force on the second sealing part 430. Due to the fitting groove 440, the first sealing part 420 and the second sealing part 430 can be finely adjusted within the fitting groove 440 range. This fine adjustment enhances their elastic response and ensures a continuous seal between the first sealing structure 400 and the sealing surface.

[0114] Since the first mounting groove 2121 is connected to the first exhaust chamber 150, and the opening of the mating groove 440 is positioned facing the connection between the first mounting groove 2121 and the first exhaust chamber 150, the high-pressure gas in the first exhaust chamber 150 can act on the groove wall of the mating groove 440. This high-pressure gas can exert a force on the first sealing part 420 and the second sealing part 430, moving them away from each other, thus making the seal between the first sealing part 420 and the second sealing part 430 tighter and improving the sealing performance of the first sealing structure 400. This adaptive tight fit not only effectively improves the reliability of the seal, making the first sealing structure 400 suitable for high-pressure environments, but also compensates to some extent for the decrease in sealing performance caused by material aging, wear, and other factors, thereby improving the reliability of the horizontal rotary compressor 1000.

[0115] In some embodiments, as shown in FIG18, the side of the first mounting portion 410 that is away from the first sealing portion 420 and the second sealing portion 430 abuts against the groove wall of the first mounting groove 2121. In this case, the groove wall of the first mounting groove 2121 can provide a certain support for the first sealing structure 400, restrict the displacement of the first sealing structure 400, and facilitate the sealing between the first mounting portion 410 and the corresponding groove wall of the first mounting groove 2121.

[0116] Furthermore, the high-pressure gas in the first exhaust chamber 150 can act on the groove wall of the mating groove 440, and the high-pressure gas can also exert a force on the first mounting part 410. This force makes the first mounting part 410 and the corresponding groove wall of the first mounting groove 2121 more tightly abut against each other, which is beneficial to improving the sealing performance of the first sealing structure 400. At the same time, it also helps to improve the accidental displacement of the first sealing structure 400 under high pressure environment to a certain extent, which is beneficial to improving the compatibility of the first sealing structure 400 with high pressure environment.

[0117] In some embodiments, as shown in FIG18, a first mounting groove 2121 is formed on the side surface of the bracket 200 corresponding to the first exhaust chamber 150. The first mounting groove 2121 can be formed by recessing a portion of the bracket 200 corresponding to the first exhaust chamber 150, so that the first mounting groove 2121 is open towards the side facing the first exhaust chamber 150. The main bearing 310 has a second hub portion 313 that mates with the crankshaft 340. A second through hole 212 is formed on the bracket 200, and the second hub portion 313 passes through the second through hole 212. The first mounting groove 2121 penetrates the hole wall of the second through hole 212. At this time, the radially inner side of the first mounting groove 2121 is also open, while the second hub portion 313 can cover the radially inner side of the first mounting groove 2121. This arrangement is beneficial for extending the axial mating length between the first sealing structure 400 and the second through hole 212. A longer mating length means that the first sealing structure 400 has a larger contact area in the axial direction, thereby better resisting the penetration and leakage of high-pressure gas.

[0118] For example, as shown in FIG18, the first mounting groove 2121 is open on the side of the crankshaft 340 facing the first exhaust cavity 150 and on the radially inner side of the first mounting groove 2121. The second hub portion 313 passes through the second through hole 212 to cover the radially inner side of the first mounting groove 2121. The first sealing portion 420 and the second sealing portion 430 can be arranged radially spaced along the crankshaft 340, and the first sealing portion 420 and the second sealing portion 430 are both connected to the side of the first mounting portion 410 facing the first exhaust cavity 150, so that the groove opening of the mating groove 440 is arranged axially along the crankshaft 340 towards the first exhaust cavity 150. Optionally, the side of the first mounting portion 410 away from the first exhaust cavity 150 can abut against the groove wall of the first mounting groove 2121 away from the first exhaust cavity 150.

[0119] Of course, the first mounting groove 2121 can also be spaced apart from the wall of the second through hole 212. In this case, the second hub portion 313 can at least partially abut against the side surface of the bracket 200 facing the first exhaust chamber 150 (the second hub portion 313 can pass through the second through hole 212 and part of the outer peripheral wall of the second hub portion 313 protrudes to form a step portion abutting against the bracket 200, or the entire second hub portion 313 abuts against the side of the bracket 200 away from the low-pressure chamber 130), and the second hub portion 313 covers a part of the first mounting groove 2121. The first mounting groove 2121 communicates with the first exhaust chamber 150 through the other part not covered by the second hub portion 313. At this time, the inner peripheral wall of the first mounting portion 410 can abut against the radial inner groove wall of the first mounting groove 2121.

[0120] In some embodiments, as shown in FIG18, the horizontal rotary compressor 1000 further includes an elastic element 450, which is disposed in the mating groove 440 and is used to apply an elastic force away from each other to the first sealing portion 420 and the second sealing portion 430. During operation of the horizontal rotary compressor 1000, the first sealing portion 420 and the second sealing portion 430 may expand or contract to different degrees due to changes in temperature and pressure. At this time, the elastic element 450 applies pressure to both through its elastic force, ensuring that they are kept away from each other and thus always fit tightly against their respective sealing surfaces. This helps improve the adaptability and reliability of the first sealing structure 400 and also reduces energy loss and failure risk due to poor sealing.

[0121] Optionally, the elastic element 450 is constructed to extend spirally along the circumference of the pump body structure 300. In this case, the elastic element 450 can be made of a helical spring, which is convenient for processing. Of course, the elastic element 450 can also be constructed to extend in a reciprocating bending manner along the circumference of the pump body structure 300.

[0122] In some embodiments, as shown in Figures 1 and 17, the pump body structure 300 further includes a main bearing 310, which is located on the side of the compression mechanism 330 away from the secondary bearing 320. A first exhaust passage is formed on the pump body structure 300, and a second exhaust passage 810 is formed on the second housing 120. The horizontal rotary compressor 1000 further includes a bracket 200, which is located at one end of the second housing 120 in the axial direction of the pump body structure 300. A first exhaust chamber 150 is defined between the bracket 200 and the main bearing 310. The silencer 351 is connected to the back pressure chamber 171 in sequence through the first exhaust passage, the first exhaust chamber 150, and the second exhaust passage 810.

[0123] This facilitates the optimization of the gas discharge path through the aforementioned pathway and also allows for the increase of the exhaust buffer space, which helps reduce the impact of exhaust pulses on the internal structure of the horizontal rotary compressor 1000. This design makes the gas discharge process more stable, reducing vibration and noise caused by sudden airflow changes, and improving the overall operational stability of the horizontal rotary compressor 1000 and the user experience. As can be seen, in the above scheme, at least a portion of the refrigerant compressed within the compression mechanism 330 can sequentially flow through the silencer 351, the first exhaust passage, the first exhaust chamber 150, the second exhaust passage 810, and the back pressure chamber 171, and then be discharged through the outlet. Due to the existence of airflow resistance, the pressure in the first exhaust chamber 150 is lower than the pressure in the back pressure chamber 171, thus achieving the back pressure design of the horizontal rotary compressor 1000.

[0124] Further, as shown in Figure 17, the horizontal rotary compressor 1000 also includes a first housing 110, which has an air inlet. The first housing 110 is located on the side of the support 200 opposite to the second housing 120, and the first housing 110 and the support 200 define a low-pressure chamber 130 communicating with the air inlet. For example, the first housing 110 and the second housing 120 can constitute the housing of the horizontal rotary compressor 1000. The support 200 is located on the housing to divide the internal space of the housing into a low-pressure chamber 130 and an inner cavity 170 (the inner cavity 170 can be understood as a high-pressure chamber). The refrigerant flows from the air inlet into the low-pressure chamber 130, and then flows to the compression mechanism 330 for compression through the air inlet channel 211 described above or a pipeline located outside the housing. It can be understood that the first housing 110 can be the low-pressure housing of the horizontal rotary compressor 1000.

[0125] As can be seen, the aforementioned partitioning of the bracket 200 facilitates the use of the low-pressure chamber 130 as a liquid storage chamber for the horizontal rotary compressor 1000 to a certain extent, thus making the horizontal rotary compressor 1000 suitable for scenarios without a liquid storage structure. Furthermore, if the horizontal rotary compressor 1000 is an electric compressor, it may also include a motor structure (not shown in the figure). The motor structure can be used to drive the compression mechanism 330 to compress the refrigerant. In this case, the low-pressure chamber 130 provides space for the motor structure. Thus, the bracket 200 can isolate the high-temperature and high-pressure gas in the inner cavity 170 from the thermal impact on the motor structure, reducing the risk of motor performance degradation or even damage due to overheating. This helps to reduce the operating temperature of the motor structure, alleviate the heat dissipation burden, extend the service life of the motor structure, improve the working stability and reliability of the horizontal rotary compressor 1000, and reduce the risk of shutdown of the horizontal rotary compressor 1000 due to motor structure failure. The crankshaft 340 extends into the low-pressure chamber 130 through the second through hole 212 on the bracket 200 to drive the motor structure.

[0126] In some embodiments, as shown in Figures 1, 4, and 17, the compression mechanism 330 includes a first cylinder 331, a second cylinder 332, and a partition plate 334. The partition plate 334 is sandwiched between the first cylinder 331 and the second cylinder 332. The first cylinder 331 and the second cylinder 332 each have a compression chamber 333. The compression chamber 333 of the first cylinder 331 is connected to the first exhaust chamber 150, and the compression chamber 333 of the second cylinder 332 is connected to the first exhaust chamber 150 through a muffler chamber 351. It can be seen that the first cylinder 331 is located between the main bearing 310 and the partition plate 334. The refrigerant compressed in the first cylinder 331 flows through the first exhaust chamber 150 to the second exhaust channel 810. The refrigerant compressed in the second cylinder 332 flows sequentially through the muffler chamber 351 and the first exhaust channel before flowing to the first exhaust chamber 150. Therefore, the refrigerant flowing out of the first cylinder 331 and the second cylinder 332 can converge in the first exhaust chamber 150.

[0127] The partition plate 334 not only serves as a physical isolation between the two cylinders but also enhances the structural stability of the horizontal rotary compressor 1000. It reduces mutual influence and vibration transmission between the cylinders, allowing both cylinder 331 and cylinder 332 to operate in a more stable environment. Therefore, this design not only extends the service life of the horizontal rotary compressor 1000 but also reduces noise caused by vibration.

[0128] The compression chamber 333 of the second cylinder 332 is connected to the first exhaust chamber 150 through the muffler chamber 351 on the pump body structure 300 and the first exhaust passage, which can optimize the exhaust process. The gas can be smoothly discharged from the second cylinder 332 and flow into the first exhaust chamber 150, making the exhaust process stable and reliable.

[0129] For example, the compression chamber 333 of the first cylinder 331 and the compression chamber 333 of the second cylinder 332 are both connected to the intake passage 211, which allows the first cylinder 331 and the second cylinder 332 to simultaneously / alternately draw in the gas to be compressed. This parallel compression operation mode can increase the gas handling capacity of the horizontal rotary compressor 1000, shorten the compression cycle, and thus improve the working efficiency of the horizontal rotary compressor 1000.

[0130] Hereinafter, with reference to the accompanying drawings, a horizontal rotary compressor 1000 according to a second aspect embodiment of the present application will be described.

[0131] As shown in Figure 17, a horizontal rotary compressor 1000 according to an embodiment of this application includes a housing 100. An inlet (not shown) and an outlet (not shown) are formed on the housing 100. The housing 100 serves to provide support for the main structure of the horizontal rotary compressor 1000. The inlet is used to introduce the gas to be compressed, while the outlet is responsible for discharging the compressed high-pressure gas.

[0132] In some embodiments, the air inlet and outlet are arranged at intervals along the axial direction of the horizontal rotary compressor 1000, and the housing 100 includes a first housing 110 and a second housing 120. The air inlet is located on the first housing 110, and the air outlet is located on the second housing 120. Referring to FIG17, this application refers to the extension direction of the central axis L of the horizontal rotary compressor 1000 as the axial direction of the horizontal rotary compressor 1000 (i.e., the axial direction of the crankshaft 340), the direction passing through the central axis L of the horizontal rotary compressor 1000 in the radial plane as the radial direction of the horizontal rotary compressor 1000, and the direction surrounding the central axis L as the circumferential direction of the horizontal rotary compressor 1000 (i.e., the circumferential direction of the crankshaft 340).

[0133] The horizontal rotary compressor 1000 also includes a support 200 and a pump body structure 300. The support 200 is disposed on the housing 100 and divides the interior of the housing 100 into a low-pressure chamber 130 and a high-pressure chamber 150. The low-pressure chamber 130 is connected to the air inlet, and the high-pressure chamber 150 is connected to the air outlet. For example, the support 200 defines the low-pressure chamber 130 between itself and the first housing 110. The low-pressure chamber 130 is directly connected to the air inlet and is responsible for receiving and initially guiding the gas to be compressed. The support 200 defines the high-pressure chamber 150 between itself and the second housing 120. The high-pressure chamber 150 is connected to the air outlet and is the output channel after the gas is compressed to a high-pressure state.

[0134] In some optional embodiments, the horizontal rotary compressor 1000 also includes a motor structure (not shown) located in the low-pressure chamber 130. This separation allows the bracket 200 to isolate the high-temperature, high-pressure gas in the high-pressure chamber 150 from the thermal effects on other sensitive components within the housing 100, particularly the motor structure, thus preventing performance degradation or even damage due to overheating. This reduces the operating temperature of the motor structure, lessens the heat dissipation burden, extends its service life, improves the operational stability and reliability of the horizontal rotary compressor 1000, and reduces the risk of compressor downtime due to motor structure failure.

[0135] Furthermore, the aforementioned partitioning of the bracket 200 facilitates the use of the low-pressure chamber 130 as a liquid storage chamber for the horizontal rotary compressor 1000 to a certain extent, thus making the horizontal rotary compressor 1000 of this application applicable to scenarios without a liquid storage structure.

[0136] The pump body structure 300 is located in the high-pressure chamber 140 and includes a main bearing 310, a secondary bearing 320, and a crankshaft 340. The main bearing 310 and the secondary bearing 320 are components in the pump body structure 300 that bear radial and axial loads. They not only support the rotational movement of the compression mechanism 330, but also ensure the smoothness and reliability of the compression mechanism 330 under high-speed operation.

[0137] Referring to Figures 17 and 23, the main bearing 310 is disposed adjacent to the bracket 200 and defines a first exhaust chamber 150 between the main bearing 310 and the bracket 200. It can be understood that the first exhaust chamber 150 provides a channel for gas discharge, and the first exhaust chamber 150 can be directly or indirectly connected to the compression chamber 333 of the horizontal rotary compressor 1000.

[0138] The crankshaft 340 passes through the auxiliary bearing 320 and the main bearing 310 and extends into the low-pressure chamber 130 through the second through hole 212 on the bracket 200 for transmission connection with the motor structure. The main function of the crankshaft 340 is to convert the rotational motion of the motor structure into the motion of the rollers, thereby pressurizing the gas.

[0139] The main bearing 310 and the auxiliary bearing 320 are key components that support the crankshaft 340 and reduce friction and wear during its movement. They are installed in the pump body structure 300 and are tightly fitted to the crankshaft 340. The main bearing 310 is located at the main stress point of the crankshaft 340 and bears large radial and axial loads, while the auxiliary bearing 320 is used to assist in supporting or adjusting the movement trajectory of the crankshaft 340.

[0140] A second perforation 212 is formed on the bracket 200 to provide a passage for the crankshaft 340 to extend into the low-pressure chamber 130. The second perforation 212 is configured to adapt to the size, shape and movement trajectory of the crankshaft 340 to ensure that the crankshaft 340 can pass smoothly and be positioned accurately.

[0141] It is known that the low-pressure chamber 130 is typically used to collect, store, and transfer refrigerant gas in a low-pressure state. During the working cycle of the horizontal rotary compressor 1000, the low-pressure refrigerant gas first enters the low-pressure chamber 130 through the inlet, and then, under the powerful compression of subsequent components, its pressure and temperature are significantly increased, finally being discharged through the outlet. Therefore, in order to maintain the pressure balance and efficient operation of the high-pressure chamber 150 inside the horizontal rotary compressor 1000, the sealing between the low-pressure chamber 130 and the high-pressure chamber 150 is crucial.

[0142] To achieve a sealing effect, referring to Figure 18, in this embodiment of the application, a first mounting groove 2121 communicating with the first exhaust chamber 150 is formed between the main bearing 310 and the bracket 200. The first mounting groove 2121 is arranged around the crankshaft 340. The horizontal rotary compressor 1000 also includes a first sealing structure 400, which is disposed in the first mounting groove 2121 and separates the first exhaust chamber 150 and the low-pressure chamber 130.

[0143] The placement of the first mounting slot 2121 not only optimizes space utilization but also enhances the accuracy and ease of installation of the first sealing structure 400. This layout ensures that the first sealing structure 400 can be precisely positioned in the required location, thereby fulfilling its insulating function.

[0144] Meanwhile, considering the continuous motion characteristics of the crankshaft 340 during the operation of the horizontal rotary compressor 1000, the first mounting groove 2121 is constructed to surround the crankshaft 340. This effectively prevents potential interference or conflict between the first sealing structure 400 and the moving crankshaft 340. Even under complex operating conditions such as high-speed rotation or reciprocating motion of the crankshaft 340, the first mounting groove 2121 can provide stable support and protection for the first sealing structure 400, ensuring that the sealing effect is unaffected and remains stable and reliable at all times.

[0145] It is understood that the first mounting groove 2121 can be formed on the main bearing 310, or the first mounting groove 2121 can be formed on the bracket 200 (as shown in Figures 18 and 22), or the main bearing 310 has a first groove and the bracket 200 has a second groove, and the first groove and the second groove are joined together to form the first mounting groove 2121.

[0146] As shown in Figures 18 and 19-22, the first sealing structure 400 includes a first mounting portion 410, a first sealing portion 420, and a second sealing portion 430, which are respectively formed in annular shape. The first sealing portion 420 and the second sealing portion 430 are both connected to the first mounting portion 410 and are spaced apart, so that a mating groove 440 is defined between the first mounting portion 410, the first sealing portion 420, and the second sealing portion 430. The first sealing portion 420 abuts against the bracket 200, and the second sealing portion 430 abuts against the main bearing 310.

[0147] The first mounting portion 410 serves as the base of the first sealing structure 400. The first sealing portion 420 and the second sealing portion 430 extend from the first mounting portion 410 and are spaced apart. A certain gap is maintained between the first sealing portion 420 and the second sealing portion 430, allowing them some deformation space and compressibility. During installation, the first sealing structure 400 can be moderately compressed so that the first sealing portion 420 and the second sealing portion 430 can fit tightly against the sealing surface, adapting to the irregularities of the sealing surface and improving the sealing effect.

[0148] For example, the first sealing part 420 directly contacts the bracket 200, and the second sealing part 430 directly contacts the main bearing 310, achieving a static seal between the bracket 200 and the main bearing 310. Since the main bearing 310 bears significant radial and axial loads during the operation of the horizontal rotary compressor 1000 and moves along with the rotation of the crankshaft 340, it exerts a certain compressive force on the second sealing part 430. Because there is a mating groove 440 between the first mounting part 410, the first sealing part 420, and the second sealing part 430, the first sealing part 420 and the second sealing part 430 can be finely adjusted within the range of the mating groove 440. This fine adjustment enhances their elastic response and ensures a continuous seal between the first sealing structure 400 and the sealing surface.

[0149] Since the first mounting groove 2121 is connected to the first exhaust chamber 150, and the opening of the mating groove 440 is positioned facing the connection between the first mounting groove 2121 and the first exhaust chamber 150, the high-pressure gas in the first exhaust chamber 150 can act on the groove wall of the mating groove 440. This high-pressure gas can exert a force on the first sealing part 420 and the second sealing part 430, moving them away from each other, thus making the seal between the first sealing part 420 and the second sealing part 430 tighter and improving the sealing performance of the first sealing structure 400. This adaptive tight fit not only effectively improves the reliability of the seal, making the first sealing structure 400 suitable for high-pressure environments, but also compensates to some extent for the decrease in sealing performance caused by material aging, wear, and other factors, thereby improving the reliability of the horizontal rotary compressor 1000.

[0150] In some alternative embodiments, the first sealing structure 400 is a single piece. During the molding process, the material is directly formed in the mold, resulting in almost no mating surfaces within the first sealing structure 400, thus achieving a seamless connection. This seamless connection greatly enhances the integrity and durability of the first sealing structure 400, enabling it to maintain a stable and reliable seal under various complex operating conditions.

[0151] In some embodiments, as shown in Figures 18 and 22, the side of the first mounting portion 410 that is away from the first sealing portion 420 and the second sealing portion 430 abuts against the groove wall of the first mounting groove 2121, which helps to improve the stability of the first sealing structure 400 in setting position and makes it less prone to displacement.

[0152] Furthermore, since the first mounting groove 2121 is connected to the first exhaust chamber 150, the high-pressure gas in the first exhaust chamber 150 can act on the groove wall of the mating groove 440. The high-pressure gas can also exert a force on the first mounting part 410, which makes the first mounting part 410 and the corresponding groove wall of the first mounting groove 2121 more tightly abut against each other, thus further improving the sealing performance of the first sealing structure 400. It is evident that this design also facilitates, to a certain extent, mitigating the accidental displacement of the first sealing structure 400 under high-pressure environments, further enhancing the compatibility of the first sealing structure 400 with high-pressure environments, and ensuring the stability and safety of the horizontal rotary compressor 1000 during operation.

[0153] In some embodiments, as shown in Figures 18 and 22, a first mounting groove 2121 is formed on one side surface of the bracket 200 corresponding to the first exhaust chamber 150. The first mounting groove 2121 can be formed by recessing a portion of the bracket 200 corresponding to the first exhaust chamber 150, so that the first mounting groove 2121 is open to the side facing the first exhaust chamber 150. The main bearing 310 has a second hub portion 313 that mates with the crankshaft 340. The crankshaft 340 passes through the second hub portion 313 to achieve a reliable fit between the crankshaft 340 and the main bearing 310.

[0154] As shown in Figure 18, the first mounting groove 2121 penetrates the wall of the second through hole 212, and the second hub portion 313 passes through the second through hole 212. At this time, the radially inner side of the first mounting groove 2121 is also open, while the second hub portion 313 can cover the radially inner side of the first mounting groove 2121. This arrangement helps to extend the axial mating length between the first sealing structure 400 and the second through hole 212. A longer mating length means that the first sealing structure 400 has a larger contact area in the axial direction, thereby better resisting the penetration and leakage of high-pressure gas.

[0155] For example, as shown in FIG18, the first mounting groove 2121 is open on the side of the crankshaft 340 facing the first exhaust cavity 150 and on the radially inner side of the first mounting groove 2121. The second hub portion 313 passes through the second through hole 212 to cover the radially inner side of the first mounting groove 2121. The first sealing portion 420 and the second sealing portion 430 can be arranged radially spaced along the crankshaft 340, and the first sealing portion 420 and the second sealing portion 430 are both connected to the side of the first mounting portion 410 facing the first exhaust cavity 150, so that the groove opening of the mating groove 440 is arranged axially along the crankshaft 340 towards the first exhaust cavity 150. Optionally, the side of the first mounting portion 410 away from the first exhaust cavity 150 can abut against the groove wall of the first mounting groove 2121 away from the first exhaust cavity 150.

[0156] Alternatively, as shown in Figure 22, the first mounting groove 2121 and the second through hole 212 are arranged radially spaced along the crankshaft 340, and the second hub portion 313 abuts against the side surface of the bracket 200 corresponding to the first exhaust chamber 150, and the hub 313 covers a part of the first mounting groove 2121; at this time, the radially inner side of the first mounting groove 2121 is closed, and the first mounting groove 2121 communicates with the first exhaust chamber 150 through the other part not covered by the hub 313.

[0157] For example, as shown in FIG22, the first mounting groove 2121 is open on the side of the crankshaft 340 facing the first exhaust chamber 150 in the axial direction and closed on the radially inner side of the first mounting groove 2121. The second hub portion 313 abuts against the side of the bracket 200 facing the first exhaust chamber 150. The first sealing portion 420 and the second sealing portion 430 can be spaced apart along the crankshaft 340 in the axial direction, and both the first sealing portion 420 and the second sealing portion 430 are connected to the outer peripheral wall of the first mounting portion 410, so that the groove opening of the mating groove 440 is arranged radially outward along the crankshaft 340. In the radial direction of the crankshaft 340, the width of the first mounting groove 2121 can be greater than the width of the first sealing structure 400, so that the first sealing structure 400 is spaced apart from the radially outer groove wall of the first mounting groove 2121. Optionally, the inner peripheral wall of the first mounting portion 410 can abut against the radially inner groove wall of the first mounting groove 2121.

[0158] It is understandable that when the first mounting groove 2121 and the second through hole 212 are radially spaced along the crankshaft 340, the stop fit between the hub 313 and the bracket 200 can be: the axial end face of the entire hub 313 stops with the bracket 200 (as shown in Figure 22), in which case the hub 313 may not pass through the second through hole 212; or a stepped portion is formed on the outer peripheral wall of the hub 313, and the stepped portion stops with the bracket 200, in which case the hub 313 can pass through the second through hole 212.

[0159] In some embodiments, as shown in FIG18, a first mounting groove 2121 penetrates the wall of a second through hole 212. A guide surface 213 is provided at the first mounting groove 2121, which is adapted to guide the first sealing structure 400 into the first mounting groove 2121 to optimize the smoothness of the first sealing structure 400 during installation. When the first sealing structure 400 is guided into the first mounting groove 2121, the guide surface 213 can provide a smooth transition area, reducing friction and collision between the first sealing structure 400 and the edge of the first mounting groove 2121, thereby reducing assembly difficulty and damage risk. In addition, the guide surface 213 also has a certain guiding function, which can ensure that the first sealing structure 400 enters the first mounting groove 2121 accurately and without error according to a predetermined trajectory and direction during installation. This precise guiding mechanism not only improves the efficiency and accuracy of assembly, but also helps to maintain the compactness and stability of the internal structure of the horizontal rotary compressor 1000.

[0160] The first mounting groove 2121 has a guide surface 213 at one end of its radially outer groove wall facing the first exhaust chamber 150, and / or the crankshaft 340 has a guide surface 213 at the groove opening position corresponding to the first mounting groove 2121 on its outer peripheral wall.

[0161] Specifically, in some designs, a guide surface 213 is provided on the radially outer wall of the first mounting groove 2121 or on the outer peripheral wall of the crankshaft 340, so that a smooth entry path can be provided for the first sealing structure 400 through unilateral guidance. In other designs, as shown in Figure 18, guide surfaces 213 are provided on both the outer wall of the first mounting groove 2121 and the outer peripheral wall of the crankshaft 340, which further improves the ease of assembly.

[0162] Of course, when the first mounting groove 2121 and the second through hole 212 are arranged radially at intervals along the crankshaft 340, the groove opening of the first mounting groove 2121 has a guide surface 213, for example, the radial inner side groove wall of the first mounting groove 2121 facing the first exhaust chamber 150 has a guide surface 213.

[0163] In some embodiments, as shown in Figures 23 and 24, the bracket 200 includes a central portion 220 and an edge portion 230 located on the same side of the first exhaust chamber 150 along the axial direction. The central portion 220 and the edge portion 230 are located on the same side of the first exhaust chamber 150 along the axial direction of the horizontal rotary compressor 1000 (i.e., the axial direction of the crankshaft 340). The second through hole 212 and the first mounting groove 2121 are both formed on the central portion 220, and the edge portion 230 is disposed around the central portion 220. Along the axial direction of the crankshaft 340, the thickness of the central portion 220 is greater than the thickness of the edge portion 230.

[0164] Specifically, both the second perforation 212 and the first mounting groove 2121 are located on the center portion 220 of the bracket 200. As the core area of ​​the bracket 200, the center portion 220 not only supports the second perforation 212 for assembly and connection but also supports the first mounting groove 2121 for fixing the first sealing structure 400. The center portion 220 is structurally thicker than the edge portion 230 to offset the strength reduction caused by the first mounting groove 2121, ensuring that the center portion 220 has sufficient strength and stability to support the corresponding structure and reducing the risk of deformation or damage caused by high-pressure gas.

[0165] Meanwhile, the edge portion 230 surrounds the center portion 220, forming a protective frame. Compared to the center portion 220, the thickness of the edge portion 230 in the crankshaft 340 axial direction is reduced. This design, while ensuring the reliability of the bracket 200, reduces the overall weight of the bracket 200 and makes the structure more compact and reasonable.

[0166] In some embodiments, as shown in FIG24, the depth H1 of the first mounting groove 2121 and the thickness H2 of the central portion 220 satisfy: H1 / H2 ≤ 3 / 4. For example, H1 / H2 can be 3 / 4, 2 / 3, 5 / 8, 1 / 2, 1 / 4, etc. By controlling the ratio of the depth H1 of the first mounting groove 2121 to the thickness H2 of the central portion 220 to less than 3 / 4, it can be ensured that the depth of the first mounting groove 2121 is not too deep, and sufficient material thickness is reserved for the central portion 220 to withstand various forces and stresses during the operation of the horizontal rotary compressor 1000, thereby improving operational reliability.

[0167] In some embodiments, the compression of the first sealing structure 400 is 8% to 20%; and / or, the interference of the first sealing structure 400 is 0.05 to 0.5 mm; and / or, the material of the first sealing structure 400 is PA46 (poly(dibutyl phthalate), also known as polyamide 46, commonly known as nylon 46), PTFE (polytetrafluoroethylene, abbreviated as PTFE, also known as Teflon) or PPS (polyphenylene sulfide). Therefore, by setting the compression and / or interference of the first sealing structure 400, reliable sealing of the first sealing structure 400 can be easily achieved, making it suitable for scenarios where the horizontal rotary compressor 1000 is a carbon dioxide compressor. By setting the first sealing structure 400 to the aforementioned material, compared to ordinary rubber, it is beneficial to improve the high temperature and high pressure resistance of the first sealing structure 400, improve the problem of easy foaming and cracking failure of the first sealing structure 400 under high temperature and high pressure conditions, and enhance the compatibility of the first sealing structure 400 with high temperature environments, thereby improving the reliability of the first sealing structure 400. Of course, the first sealing structure 400 can also be made of other polymer materials.

[0168] It is worth noting that the compression amount refers to the percentage of the height difference of the first sealing structure 400 before and after compression (the height of the first sealing structure 400 before compression / assembly minus the height of the first sealing structure 400 after compression) relative to its height before assembly. For example, as shown in Figure 18, when the first sealing structure 400 is radially compressed after assembly, its compression amount refers to the percentage of the radially compressed dimension of the first sealing structure 400 after assembly relative to its radial dimension before assembly; as shown in Figure 22, when the first sealing structure 400 is axially compressed after reassembly, its compression amount refers to the percentage of the axially compressed dimension of the first sealing structure 400 after assembly relative to its axial dimension before assembly.

[0169] Optionally, the compression of the first sealing structure 400 can be 8%, 10%, 13%, 15%, 20%, etc. Controlling the compression of the first sealing structure 400 to 8% to 20% here can ensure that the first sealing structure 400 can achieve the best sealing effect after installation, reduce or eliminate leakage channels, thereby improving the sealing performance of the horizontal rotary compressor 1000.

[0170] As can be seen, in the design of the sealing structure of the horizontal rotary compressor 1000, the interference fit refers to the difference between the size of the first sealing structure 400 in its free state (when not installed) and the space it occupies after installation. The presence of the interference fit helps ensure that the sealing structure will not loosen or fall off due to factors such as vibration, temperature changes, or pressure fluctuations after installation, thereby maintaining stable sealing performance.

[0171] Optionally, the interference fit of the first sealing structure 400 can be 0.05mm, 0.15mm, 0.35mm, 0.4mm, 0.5mm, etc. Here, controlling the interference fit of the first sealing structure 400 within the range of 0.05 to 0.5mm ensures that the horizontal rotary compressor 1000 maintains structural stability and reliability while achieving efficient sealing.

[0172] In some embodiments, as shown in Figures 18, 19-22, the horizontal rotary compressor 1000 further includes an elastic element 450, which is disposed in the mating groove 440 and is located between the first sealing portion 420 and the second sealing portion 430; wherein the elastic element 450 is used to apply an elastic force to the first sealing portion 420 and the second sealing portion 430 to move them away from each other.

[0173] When the horizontal rotary compressor 1000 is running, the first sealing part 420 and the second sealing part 430 may expand or contract to different degrees due to changes in temperature and pressure. At this time, the elastic element 450 applies pressure to the two sealing parts through its elastic force, ensuring that they are kept away from each other and thus always tightly fitted to their respective sealing surfaces. This helps improve the adaptability and reliability of the first sealing structure 400 and also reduces energy loss and failure risks caused by poor sealing.

[0174] Optionally, the elastic element 450 is made of stainless steel; however, the material of the elastic element 450 is not limited to this.

[0175] In some embodiments, as shown in Figures 19-21, the elastic element 450 is constructed to extend circumferentially helically along the crankshaft 340, with one end of the elastic element 450 interlocking with the other end. Thus, the elastic element 450 can be made of a helical spring, facilitating its molding. Simultaneously, the interlocking assembly between the two ends of the elastic element 450 facilitates its assembly with the first sealing structure 400, and allows the elastic element 450 to form a closed ring, providing some support to the entire first sealing structure 400.

[0176] Taking Figure 19 as an example, the elastic element 450 is a spring, with its ends connected to form a closed-loop structure. When the spring is in its natural state, its closed-loop structure surrounds and supports the first sealing part 420 and the second sealing part 430, forming a certain initial preload. This preload helps ensure that the two sealing parts achieve a certain sealing effect during initial installation, reducing the risk of leakage. As the operating state of the horizontal rotary compressor 1000 changes, such as due to pressure fluctuations, temperature changes, or vibrations, small gaps or displacements may occur between the two sealing parts and their respective contact surfaces, causing gas leakage. At this time, the spring force can play a role, applying a force that moves the two sealing parts away from each other, keeping the first sealing part 420 and the second sealing part 430 in close contact with their respective contact surfaces, thereby maintaining or enhancing the sealing effect of the entire first sealing structure 400.

[0177] In other embodiments, the elastic element 450 may also be an annular rubber ring, or any other material that has a certain degree of flexibility and can make the two sealing parts fit tightly against their respective contact surfaces.

[0178] In some embodiments, as shown in FIG19, the outer diameter of one end of the elastic member 450 is smaller than the inner diameter of the other end. This reduces the assembly difficulty when the elastic members 450 are connected end to end, facilitates insertion and mating, and improves the flexibility of the elastic member 450 in use.

[0179] Specifically, when the outer diameter of one end of the elastic element 450 is smaller than the inner diameter of the other end, the end with the smaller outer diameter can be easily inserted into the end with the larger inner diameter, so that they are joined together to form a complete closed-loop structure. Taking a spring as an example, the coil of the spring has different diameters at its two ends. The end with the smaller coil diameter is assembled into the end with the larger coil diameter to achieve a connection between the two ends.

[0180] In some embodiments, referring to FIG. 19, the overlapping portions R at both ends of the elastic member 450 extend spirally, and the overlapping portion R has 3 to 4 turns. This ensures, on the one hand, that the two ends of the elastic member 450 can be firmly connected together and will not easily separate due to vibration or pressure fluctuations, thereby maintaining the stability and reliability of the first sealing structure 400; on the other hand, it avoids material waste caused by an excessively long overlapping area. For example, if the overlapping portion R has 3 turns, then the 3 turns at one end of the elastic member 450 are interlocked with the 3 turns at the other end to form the overlapping portion R; of course, the overlapping portion R can also be 3.5 turns, or 4 turns, etc.

[0181] In some other embodiments, the elastic element 450 is configured to extend in a reciprocating bending motion along the circumference of the crankshaft 340. For example, the elastic element 450 is formed into a serpentine sheet-like structure. Viewed in cross-section, the elastic element 450 exhibits a V-shaped structural feature, with its two sides tightly abutting against the first sealing portion 420 and the second sealing portion 430, respectively. When the horizontal rotary compressor 1000 is operating, the first sealing portion 420 and the second sealing portion 430 may experience slight displacement due to the rotation of the crankshaft 340 and changes in internal pressure. At this time, the two sides of the V-shaped elastic element 450 can exert a force that pulls the two sealing portions away from each other, thereby ensuring that the two sealing portions maintain tight contact with their respective contact surfaces and effectively preventing gas leakage.

[0182] As shown in Figure 17, in some embodiments, the pump body structure 300 further includes a compression mechanism 330 sandwiched between the main bearing 310 and the secondary bearing 320. The compression mechanism 330, as part of the pump body structure 300, is responsible for compressing the intake gas and converting it into high-pressure gas.

[0183] Since the compression mechanism 330 is sandwiched between the main bearing 310 and the secondary bearing 320, this arrangement not only provides stable support for the compression mechanism 330, but also ensures that the compression mechanism 330 maintains coaxiality during high-speed rotation, reducing vibration and noise.

[0184] As shown in Figure 22, at least one compression chamber 333 is provided inside the compression mechanism 330, which is the key area for gas compression. It can be understood that there can be one or more compression chambers 333. When the compression mechanism 330 is designed with multiple compression chambers 333, these chambers are typically arranged in a certain order to form a multi-stage compression structure. This multi-stage arrangement of compression chambers 333 can significantly improve the efficiency of gas compression, but it is not limited to this.

[0185] As shown in Figures 22-24 and 13-16, the compression chamber 333 is connected to the low-pressure chamber 130 through the intake passage 211. The intake passage 211 passes through the bracket 200 and the main bearing 310. The horizontal rotary compressor 1000 also includes a second sealing structure 500, which is disposed between the bracket 200 and the main bearing 310 and surrounds the intake passage 211 to separate the first exhaust chamber 150 from the intake passage 211. And / or, as shown in Figures 22, 15, 16, 9 and 11, the horizontal rotary compressor 1000 also includes a filter structure 700, which is disposed between the air inlet (the air inlet is formed on the housing 100) and the inlet 333a of the compression chamber 333.

[0186] The compression chamber 333 is connected to the first exhaust chamber 150 to ensure that the compressed high-pressure gas can be smoothly discharged. Meanwhile, an intake channel 211 is specially designed to introduce the low-pressure gas from the low-pressure chamber 130 into the compression mechanism 330 of the high-pressure chamber 150 for compression. This intake channel 211 passes through the bracket 200 and the main bearing 310, connecting the low-pressure chamber 130 and the compression chamber 333, providing a smooth path for gas flow.

[0187] To ensure the sealing and efficiency of the compression process, the horizontal rotary compressor 1000 also includes a second sealing structure 500. The second sealing structure 500 is located between the support 200 and the main bearing 310 and surrounds the intake passage 211 to separate the first exhaust chamber 150 from the intake passage 211, preventing backflow of high-pressure gas or leakage of low-pressure gas, thereby ensuring the smooth operation of the entire compression process.

[0188] As can be seen, the second sealing structure 500 can also separate the first exhaust chamber 150 from the portion of the intake channel 311 formed on the bracket 200, and separate the first exhaust chamber 150 from the low-pressure chamber 130, thereby improving the leakage phenomenon and achieving the static sealing of the intake of the horizontal rotary compressor 1000. This ensures that the gas can be smoothly drawn into the compression mechanism 330 through the intake channel 311 and discharged to the outlet through the first exhaust chamber 150, thereby improving the problems of reduced efficiency and pressure fluctuation of the horizontal rotary compressor 1000. At the same time, it also helps to reduce the processing requirements of the sealing position between the bracket 200 and the main bearing 310, and reduce the processing difficulty.

[0189] During the operation of the horizontal rotary compressor 1000, minute impurities in the surrounding environment, such as dust and other fine particles, may enter the interior of the pump body structure 300 through unsealed gaps. Impurities in the piping system connected to the horizontal rotary compressor may also enter the compressor along with the refrigerant. Once these impurities enter, they may not only contaminate the compressed gas and reduce its quality, but may also adhere to critical components such as the compression mechanism 330 and bearings, leading to accelerated wear and, in severe cases, even malfunction. For example, the precision of the pump body structure of a rolling rotor compressor is at the micrometer level; impurities larger than micrometers may cause the rotor to stall.

[0190] In the above solution, by setting up a filter structure 700, the risk of impurities entering the compression mechanism 330 is reduced, ensuring the cleanliness of the internal environment of the compression mechanism 330 and the purity of the working medium, reducing the maintenance cost and failure rate of the horizontal rotary compressor 1000, and making it suitable for scenarios with high sensitivity to impurities; and for high-precision compression mechanisms, it improves the problem of impurities entering the compression structure and causing blockage, thereby improving the reliability and stability of the horizontal rotary compressor operation.

[0191] Optionally, the filter structure 700 is disposed within the housing 100 to reduce the external space occupied by the horizontal rotary compressor 1000.

[0192] The main function of the filter structure 700 is to act as a barrier, intercepting impurities in the gas before it enters the compression chamber 333. This pre-filtration mechanism ensures that only purified gas can enter the compression chamber 333 for further compression, thereby avoiding contamination of the compressed gas quality by impurities. It also reduces potential damage such as wear and stalling of the internal mechanical components of the horizontal rotary compressor 1000, extending the service life of the horizontal rotary compressor 1000. Therefore, the specific location of the filter structure 700 can be flexibly adjusted according to requirements. Taking the filter structure 700 as an example: the filter structure 700 can be directly installed at the air inlet of the horizontal rotary compressor 1000, or at the inlet 333a of the compression chamber 333, or downstream of the air inlet of the horizontal rotary compressor 1000 and upstream of the inlet 333a of the compression chamber 333 (for example, the filter structure 700 can be installed in the low-pressure chamber, or at the air inlet channel 211). It is understandable that there can be multiple filter structures (700).

[0193] In related technologies, the filter structure is located on the liquid receiver, but for compressors without a liquid receiver, it is difficult to improve the stall problem. Obviously, in the above solution, the setting of the filter structure 700 makes the horizontal rotary compressor 1000 suitable for scenarios without a liquid receiver.

[0194] Optionally, as shown in Figures 23 and 13, at least one of the bracket 200 and the main bearing 310 is provided with a second mounting groove 312 surrounding the air intake passage 211, and the second sealing structure 500 is provided in the second mounting groove 312.

[0195] In some embodiments, as shown in FIG16, the horizontal rotary compressor 1000 includes a second sealing structure 500, which is an integral part and has the same structure as the first sealing structure 400. For example, the second sealing structure 500 includes a second mounting portion 530, a third sealing portion 540, and a fourth sealing portion 550, which are respectively formed in annular shape. The third sealing portion 540 and the fourth sealing portion 550 are both connected to the outer peripheral wall of the second mounting portion 530, and the third sealing portion 540 and the fourth sealing portion 550 are spaced apart along the axial direction of the second sealing structure 500 so that a groove is defined between the second mounting portion 530, the third sealing portion 540, and the fourth sealing portion 550. The third sealing portion 540 abuts against the bracket 200, and the fourth sealing portion 550 abuts against the main bearing 310.

[0196] For example, the main bearing 310 has a second mounting groove 312, which communicates with the first exhaust chamber 150. The second sealing structure 500 is disposed in the second mounting groove 312. The high-pressure gas in the first exhaust chamber 150 can act on the groove wall, and the high-pressure gas can exert a force on the third sealing part 540 and the fourth sealing part 550, moving them away from each other, thereby making the seal between the third sealing part 540 and the fourth sealing part 550 tighter and improving the sealing performance of the second sealing structure 500.

[0197] Of course, this application is not limited to this; in some embodiments, as shown in Figures 13-15, the second sealing structure 500 includes a support member 510 and a sealing member 520. The support member 510 is an annular structure, and the sealing member 520 is completely wrapped around the support member 510. Both the support member 510 and the sealing member 520 are arranged around the air intake channel 211, so the support member 510 is embedded in the sealing member 520 to improve the bonding strength between the support member 510 and the sealing member 520; the elastic modulus of the support member 510 is greater than that of the sealing member 520. Thus, the support member 510 can provide support for the sealing member 520. The limiting function of the support member 510 not only restricts the movement range of the sealing member 520, but also ensures that the sealing member 520 can maintain a certain position and shape when subjected to pressure through its shape and size design, thereby reducing the risk of displacement and excessive deformation. As can be seen, the support member 510, as the skeleton of the second sealing structure 500, ensures that the seal 520 can maintain its shape and position stability when subjected to external forces or vibrations, and is not prone to excessive deformation. This stability is of great significance in preventing the seal 520 from shifting or failing under extreme working conditions. At the same time, the support member 510 also bears part of the mechanical load to extend the service life of the first sealing structure 400.

[0198] The seal 520 completely encloses the support 510, forming a soft and elastic sealing layer. This design allows the seal 520 to better adapt to the sealing surface, achieving a tighter fit. When the support 510 provides stable support, the seal 520 can distribute pressure more evenly, further improving the sealing effect.

[0199] In addition, due to the presence of the support member 510, the direct mechanical impact and wear on the seal 520 are greatly reduced. This means that the seal 520 can maintain its original performance and shape for a longer period of time, improving the durability of the entire first sealing structure 400.

[0200] To better adapt to complex sealing surface shapes or meet specific sealing requirements, the cross-sectional shape of the support 510 can be designed as an irregular shape. These irregular shapes can be customized according to the specific contour of the sealing surface to ensure that the seal 520 can fit tightly and provide an effective seal. In some optional embodiments, the cross-sectional shape of the support 510 can be a circle, semicircle, triangle, rectangle, or other polygonal or irregular shape. Exemplarily, the support 510 is a metal or plastic part, and the seal 520 is a rubber part.

[0201] In some embodiments, as shown in Figures 13, 15 and 16, the horizontal rotary compressor 1000 includes a second sealing structure 500 and a filter structure 700. The filter structure 700 is disposed at the air intake channel 211, and the second sealing structure 500 is sleeved outside the filter structure 700. In this case, the filter structure 700 can limit the radial displacement of the second sealing structure 500 to a certain extent, thereby improving the installation reliability and sealing performance of the second sealing structure 500.

[0202] Further, as shown in Figures 23, 15, and 16, the compression mechanism 330 has a mating cavity 335, which communicates with at least one compression cavity 333. A filter structure 700 passes through the intake passage 211 and the mating cavity 335. The filter screen 720 of the filter structure 700 is radially opposite to the inlet 333a of the at least one compression cavity 333 of the horizontal rotary compressor 1000.

[0203] Therefore, the filter screen 720 can cover the inlet 333a of the compression chamber 333 to achieve filtration, and it is beneficial to reduce the obstruction of the airflow at the inlet 333a by the filter structure 700. It is also not easy to excessively reduce the airflow area due to the filter structure 700, and it will not excessively increase the airflow resistance, so as to ensure the smooth flow of airflow. In particular, when the filter structure 700 also includes a mounting bracket 710, which includes a first skeleton part 711, a hollow part 712 and a second skeleton part 713, the second skeleton part 713 is located in the mating cavity 335 and is staggered from the inlet 333a, so that the second skeleton part 713 will not block the airflow at the inlet 333a, nor will it block the airflow in the air intake channel 311 and the mating cavity 335.

[0204] For example, as shown in Figures 23, 15 and 16, the compression mechanism 330 includes a first cylinder 331, a second cylinder 332 and a partition plate 334. The mating cavity 335 passes through the first cylinder 331 and the partition plate 334 and extends into the second cylinder 332, so that the mating cavity 335 communicates with the compression cavity 333 of the first cylinder 331 and also communicates with the compression cavity 333 of the second cylinder 332. The inlet 333a of the first cylinder 331 and the inlet 333a of the second cylinder 332 are both radially opposite to the filter screen 720 of the filter structure 700, so that the refrigerant filtered by the filter structure 700 can be distributed to the first cylinder 331 and the second cylinder 332.

[0205] The second sealing structure 500 is fitted outside the filter structure 700, so the filter structure 700 can limit the radial displacement of the second sealing structure 500 to a certain extent, which is beneficial to improving the installation reliability and sealing performance of the second sealing structure 500. For example, the second sealing structure 500 is fitted outside the mounting bracket 710, and the mounting bracket 710 can better limit the second sealing structure 500 relative to the filter screen 720, so as to further improve the installation stability of the second sealing structure 500.

[0206] For example, the mounting bracket 710 includes a first skeleton portion 711, a hollow portion 712, and a second skeleton portion 713. A filter screen 720 is disposed in the hollow portion 712, and the two axial ends of the filter screen 720 are respectively connected to the first skeleton portion 711 and the second skeleton portion 713. A second sealing structure 500 is sleeved outside the first skeleton portion 711, or the second sealing structure 500 is sleeved outside the hollow portion 712. For example, when the first skeleton portion 711 is limited and fitted into the third mounting groove 2111 on the bracket 200, if the first skeleton portion 711 does not extend into the main bearing 310, the second sealing structure 500 is sleeved outside the hollow portion 712; if the first skeleton portion 711 extends into the main bearing 310, the second sealing structure 500 is sleeved outside the first skeleton portion 711.

[0207] In some embodiments, as shown in Figures 15 and 16, a third mounting groove 2111 is formed on the wall of the bracket 200 corresponding to the air intake channel 211. The third mounting groove 2111 passes through one end of the bracket 200 facing the main bearing 310. The filter structure 700 is limited and fitted into the third mounting groove 2111 to restrict the axial movement of the filter structure 700 and improve the installation reliability. Moreover, the filter structure 700 can be inserted into the third mounting groove 2111 along the direction of the main bearing 310 toward the bracket 200 to reduce the length of the filter structure 700 when it is fitted into the bracket 200, which is beneficial to improving the installation convenience of the filter structure 700.

[0208] For example, the mounting bracket 710 of the filter structure 700 includes a first skeleton part 711, a hollow part 712 and a second skeleton part 713. The first skeleton part 711 is limited and fitted in the third mounting groove 2111, and the filter screen 720 and the hollow part 712 pass through the main bearing 310.

[0209] Of course, the installation configuration of the filter structure 700 is not limited to this. In some other embodiments, as shown in FIG9, the filter structure 700 has a first outward protrusion 700a, which is sandwiched between the bracket 200 and the main bearing 310. This can also restrict the axial movement of the filter structure 700 and achieve reliable installation of the filter structure 700. Exemplarily, the first outward protrusion 700a can be formed by a portion of the outer peripheral wall of the mounting bracket 710 protruding radially outward along the filter screen 720. For example, the first outward protrusion 700a can be formed as a rib extending in an annular shape along the circumference of the filter screen 720.

[0210] It is understood that the first protrusion 700a can be located at the end of the mounting bracket 710 in the axial direction of the filter screen 720, or the first protrusion 700a and the two ends of the mounting bracket 710 in the axial direction of the filter screen 720 can be spaced apart respectively; at least one of the bracket 200 and the main bearing 310 is fixedly connected to the first protrusion 700a, or neither the bracket 200 nor the main bearing 310 is connected to the first protrusion 700a. In this case, the first protrusion 700a can be clamped and fixed by the connecting force of the fixed connection between the bracket 200 and the main bearing 310, so as to realize the installation of the filter structure 700.

[0211] For example, the first protrusion 700a is located at the end of the mounting bracket 710 along the axial direction of the filter screen 720. Since the filter screen 720 is opposite to the inlet 333a of the compression chamber 333, the first protrusion 700a is located at the end of the mounting bracket 710 away from the downstream end of the filter screen 720. In this case, the filter structure 700 can pass through the air intake channel 311 and the mating cavity 335, but not through the bracket 200. For example, the mounting bracket 710 includes a first skeleton portion 711, a hollow portion 712 and a second skeleton portion 713 connected sequentially along the axial direction of the filter screen 720. The first protrusion 700a is formed at the end of the first skeleton portion 711 away from the second skeleton portion 713, and the filter screen 720 and the hollow portion 712 pass through the main bearing 310. Of course, the first protrusion 700a can also be spaced between the two ends of the mounting bracket 710 along the axial direction of the filter screen 720. In this case, the filter structure 700 can pass through the bracket 300 and the mating cavity 335.

[0212] In some embodiments, as shown in Figure 11, a heat insulation cover 360 is provided on the side of the bracket 200 facing away from the main bearing 310. This heat insulation cover 360 facilitates the separation of at least a portion of the uncompressed low-temperature refrigerant from the high-temperature bracket 200, which helps reduce the heat transfer from the bracket 200 towards the low-temperature refrigerant, thereby reducing suction heat loss and improving the energy efficiency of the horizontal rotary compressor 1000. The filter structure 700 is fixedly connected to the heat insulation cover 360, and the heat insulation cover 360 enables the installation of the filter structure 700. And / or, the filter structure 700 has a second outward protrusion 700b sandwiched between the heat insulation cover 360 and the bracket 200. For example, the second outward protrusion 700b can be formed by a portion of the outer peripheral wall of the mounting bracket 710 protruding radially outward along the filter screen 720, forming a ring-shaped rib extending circumferentially along the filter screen 720. Thus, reliable installation of the filter structure 700 can also be achieved, and the installation method is flexible. For example, the thermal conductivity of the heat shield 360 can be less than that of the bracket 200. Therefore, the filter structure 700 can be installed flexibly and reliably.

[0213] It is understood that the second protrusion 700b can be located at the end of the mounting bracket 710 in the axial direction of the filter screen 720, or the second protrusion 700b and the two ends of the mounting bracket 710 in the axial direction of the filter screen 720 can be spaced apart respectively; at least one of the heat insulation cover 360 and the bracket 200 is fixedly connected to the second protrusion 700b, or neither the heat insulation cover 360 nor the bracket 200 is connected to the second protrusion 700b. In this case, the second protrusion 700b can be clamped and fixed by the connection force of the fixed connection between the heat insulation cover 360 and the bracket 200, so as to realize the installation of the filter structure 700. For example, the second protrusion 700b is located at the end of the mounting bracket 710 along the axial direction of the filter screen 720. Since the filter screen 720 is opposite to the inlet 333a of the compression chamber 333, the second protrusion 700b is located at the end of the mounting bracket 710 away from the downstream end of the filter screen 720. In this case, the filter structure 700 can pass through the air intake channel 311 and the mating cavity 335, but not through the bracket 200. For example, the mounting bracket 710 includes a first skeleton portion 711, a hollow portion 712, and a second skeleton portion 713 connected sequentially along the axial direction of the filter screen 720. The second protrusion 700b is formed at the end of the first skeleton portion 711 away from the second skeleton portion 713. Of course, the first protrusion 700a can also be spaced between the two ends of the mounting bracket 710 along the axial direction of the filter screen 720. In this case, the filter structure 700 can pass through the bracket 200 and the mating cavity 335.

[0214] Furthermore, when the mounting bracket 710 is fixedly connected to the heat insulation cover 360, at least a portion of the mounting bracket 710 can be integrally formed into the heat insulation cover 360, or the mounting bracket 710 and the heat insulation cover 360 are separate parts and connected by assembly means.

[0215] For the various installation schemes of the filter structure 700, whether through the third mounting groove 2111, the first external protrusion 700a, the heat insulation cover 360, or the second external protrusion 700b, in the direction from the secondary bearing 320 to the main bearing 310, it is easy to ensure that the filter structure 700 does not exceed the end face of the bracket 200 away from the secondary bearing 320, or that the size of the filter structure 700 exceeding the end face of the bracket 200 away from the secondary bearing 320 can be controlled. This helps to reduce the space occupied by the filter structure 700 on the side of the bracket 200 away from the secondary bearing 320 (e.g., the low-pressure chamber 130 mentioned later). If the horizontal rotary compressor 1000 is an electric compressor, it is easy to provide sufficient space for the motor structure in the low-pressure chamber 130, while the motor structure is less likely to interfere with the filter structure 700.

[0216] In some embodiments, as shown in Figures 22, 15, 16, 9, and 11, the filter structure 700 includes a mounting bracket 710 and a filter screen 720. The filter screen 720 is formed into a cylindrical structure, and the mounting bracket 710 closes one axial end of the filter screen 720. It can be seen that the filter structure 700 can be installed via the mounting bracket 710, while the two axial ends of the filter screen 720 are open to form openings. The opening at the upstream end of the filter screen 720 allows airflow to enter the filter screen 720, and the mounting bracket 710 closes the opening at the downstream end of the filter screen 720. The airflow entering the filter screen 720 can pass through the filter screen 720 approximately radially to be filtered by the filter screen 720. Therefore, the airflow at the opening at the upstream end of the filter screen 720 can flow approximately axially along the filter screen 720, and the refrigerant exiting the filter screen 720 will not flow directly towards the filter screen 720, which helps to reduce the impact of the airflow on the filter screen 720 during its flow. Furthermore, since the mounting bracket 710 encloses the downstream end of the filter screen 720, part of the impact of the airflow on the filter structure 700 is applied to the mounting bracket 710. This allows the mounting bracket 710 to withstand this impact, which helps to further reduce the impact on the filter screen 720 and improve reliability. At the same time, it helps to reduce the installation requirements of the filter screen 720. It eliminates the need to ensure that all refrigerant flowing to the compression mechanism 330 passes through the filter screen 720 before reaching the compression mechanism 330 by ensuring that the filter screen 720 is tightly fitted with other components, thus simplifying the installation of the filter structure 700.

[0217] In this embodiment, the connection method between the mounting bracket 710 and the filter screen 720 is not specifically limited. For example, the mounting bracket 710 and the filter screen 720 can be connected by injection molding or welding. The axial direction of the filter screen 720 can be parallel to the axial direction of the horizontal rotary compressor 1000 (i.e., the axial direction of the pump body structure 300, the axial direction of the crankshaft 340, and the extension direction of the central axis L in the figure), or the axial direction of the filter screen 720 can also form a non-zero angle with the axial direction of the horizontal rotary compressor 1000.

[0218] In some embodiments, as shown in Figures 22, 9, 11, 15, and 16, the mounting frame 710 includes a first skeleton portion 711, a perforated portion 712, and a second skeleton portion 713 arranged sequentially in the airflow direction. The first skeleton portion 711 is formed into a ring structure, and at least a majority of the filter screen 720 is disposed in the perforated portion 712. The two axial ends of the filter screen 720 are respectively connected to the first skeleton portion 711 and the second skeleton portion 713, and the second skeleton portion 713 closes one axial end of the filter screen 720. Thus, the internal space of the first skeleton portion 711 can correspond to the inlet of the filter structure 700, which facilitates the filter structure 700 to filter all airflow flowing towards the inlet 333a of the compression mechanism 330. Moreover, the mounting frame 710 can support the filter screen 720 as a whole to maintain the shape of the filter screen 720, which helps to improve the reliability of the filter structure 700.

[0219] In this embodiment, the structure of the perforated portion 712 is not specifically limited. It is sufficient that the perforated portion 712 has a channel connecting its interior and exterior, so that the airflow entering the filter screen 720 can pass through the filter screen 720 and smoothly exit the filter structure 700. For example, the perforated portion 712 may include multiple connecting rods spaced circumferentially along the first skeleton portion 711. The two ends of each connecting rod are respectively connected to the first skeleton portion 711 and the second skeleton portion 713. The space between two adjacent connecting rods can form a channel connecting the interior and exterior of the perforated portion 712. The airflow entering the filter screen 720 can pass through this channel and exit the filter screen 720. The perforated portion 712 has a simple structure, facilitates reliable support for the filter screen 720, and has relatively little obstruction to airflow.

[0220] As shown in Figure 17, in some embodiments, a second exhaust chamber 160 is defined between the pump body structure 300 and the inner wall of the high-pressure chamber 150 (e.g., the inner surface of the second housing 120), communicating with the outlet of the horizontal rotary compressor 1000. A second exhaust passage 810 communicating with the first exhaust chamber 150 and the second exhaust chamber 160 is formed on the housing 100. This facilitates optimized gas flow path in the second exhaust chamber 160 and reduces the impact of exhaust pulses on the internal structure of the horizontal rotary compressor 1000 by increasing the exhaust buffer space. This configuration makes the gas discharge process more stable, reducing vibration and noise caused by sudden airflow changes, and improving the overall operational stability of the horizontal rotary compressor 1000 and the user experience. As can be seen, in the above scheme, the refrigerant that has been compressed in the compression chamber 333 can flow sequentially through the first exhaust chamber 150, the second exhaust passage 810, and the second exhaust chamber 160, and then be discharged through the outlet. Due to the existence of airflow resistance, the pressure in the second exhaust chamber 160 is less than the pressure in the exhaust chamber 150, so as to realize the back pressure design of the horizontal rotary compressor 1000.

[0221] In some embodiments, as shown in FIG22, the compression mechanism 330 includes a first cylinder 331, a second cylinder 332 and a partition plate 334. The partition plate 334 is sandwiched between the first cylinder 331 and the second cylinder 332. The first cylinder 331 and the second cylinder 332 each have a compression chamber 333. The compression chamber 333 of the first cylinder 331 is connected to the first exhaust chamber 150. The compression chamber 333 of the second cylinder 332 is connected to the first exhaust chamber 150 through the third exhaust channel 820 on the pump body structure 300. As can be seen, the first cylinder 331 is located between the main bearing 310 and the partition plate 334. The refrigerant that has been compressed in the first cylinder 331 flows through the first exhaust chamber 150 to the second exhaust channel 810. The refrigerant that has been compressed in the second cylinder 332 flows through the third exhaust channel 820 and the first exhaust chamber 150 in sequence and then flows to the second exhaust channel 810. Thus, the refrigerant flowing out of the first cylinder 331 and the second cylinder 332 can converge in the first exhaust chamber 150.

[0222] Since the compression chambers 333 in both the first cylinder 331 and the second cylinder 332 are connected to the intake passage 311, this allows the first cylinder 331 and the second cylinder 332 to simultaneously / alternately draw in the gas to be compressed. This parallel compression operation increases the gas throughput of the horizontal rotary compressor 1000, shortens the compression cycle, and thus improves the working efficiency of the horizontal rotary compressor 1000. The partition plate 334 not only serves as a physical isolation between the two cylinders but also enhances the structural stability of the horizontal rotary compressor 1000. It reduces mutual influence and vibration transmission between cylinders, allowing each cylinder to operate in a more stable environment. Therefore, this design not only extends the service life of the horizontal rotary compressor 1000 but also reduces noise caused by vibration.

[0223] The compression chamber 333 of the second cylinder 332 is connected to the first exhaust chamber 150 through the third exhaust passage 820 on the pump body structure 300. This design optimizes the exhaust process, ensuring that the gas can be smoothly discharged from the second cylinder 332 and merged into the first exhaust chamber 150, thereby making the exhaust process stable and reliable.

[0224] In some embodiments, as shown in Figures 17 and 22, the pump body structure 300 further includes a muffler 350 disposed on the auxiliary bearing 320. The muffler 350 and the auxiliary bearing 320 form a muffler cavity 351 as part of the third exhaust passage 820. The housing 100 and the auxiliary bearing 320 define an oil return cavity 172 that communicates with the low-pressure cavity 130. The oil return cavity 172 may be located at the end of the auxiliary bearing 320 away from the main bearing 310. The horizontal rotary compressor 1000 further includes a third sealing structure 600. The third sealing structure 600 is an integral piece and is sealed between the muffler 350 and the auxiliary bearing 320, and between the housing 100 and the auxiliary bearing 320, so as to separate the muffler cavity 351 from the oil return cavity 172 and separate the second exhaust cavity 160 from the oil return cavity 172.

[0225] By placing the silencer 350 on the auxiliary bearing 320 within the pump body structure 300, this layout not only saves space but also achieves the dual functions of noise reduction and bearing support. This reduces the number of sealing structures and simplifies the structure and assembly of the horizontal rotary compressor 1000. The silencing cavity 351 between the silencer 350 and the auxiliary bearing 320, as part of the third exhaust passage 820, reduces noise generated during exhaust, enabling the horizontal rotary compressor 1000 to maintain a lower noise level during operation and providing a quieter environment for the user.

[0226] To ensure the sealing and independence of the internal chambers of the horizontal rotary compressor 1000, as shown in Figure 2, this application also includes a third sealing structure 600. The third sealing structure 600 is an integral piece and possesses strong reliability. As shown in Figure 2, from the cross-section of the third sealing structure 600, it extends axially along the horizontal rotary compressor 1000. One axial end of the third sealing structure 600 seals between the silencer 350 and the auxiliary bearing 320, and the other end seals between the housing 100 and the auxiliary bearing 320. The integral third sealing structure 600 can separate the silencer chamber 351 from the oil return chamber 172, and also separate the second exhaust chamber 160 from the oil return chamber 172. Therefore, the third sealing structure 600 improves the sealing efficiency inside the horizontal rotary compressor 1000, effectively preventing the mixing of gas and oil between different chambers, and also avoiding internal pressure leakage, thus ensuring the stable operation and high efficiency of the horizontal rotary compressor 1000. The oil return chamber 172, the silencing chamber 351, and the second exhaust chamber 160 can all be located within the high-pressure chamber 140. The second exhaust chamber 160 can be located on the side of the pump body structure 300 facing the oil return chamber 172, and the silencing chamber 351 can be located in the part of the pump body structure 300 adjacent to the second exhaust chamber 160. Thus, the positions of the oil return chamber 172, the silencing chamber 351, and the second exhaust chamber 160 are relatively concentrated, which facilitates the third sealing structure 600 of the integrated structure to separate the three, which helps to reduce the number of seals and improve assembly efficiency.

[0227] As shown in Figure 17, the oil return chamber 172 defined between the housing 100 and the auxiliary bearing 320 is a component of the lubrication system of the horizontal rotary compressor 1000. The oil return chamber 172 receives used oil and allows it to flow back to the low-pressure chamber 130. The lubricating oil in the low-pressure chamber 130 can flow with the refrigerant into the compression mechanism 330, and then flow through the gaps in the compression mechanism 330 back to the oil return chamber 130, thus forming an internal circulation of lubricating oil, which is beneficial for improving lubrication. The layout of the oil return chamber 172 not only ensures the full recovery and utilization of lubricating oil but also reduces oil waste. Furthermore, since the oil return chamber 172 is isolated from components such as the second exhaust chamber 160 and the silencer chamber 351, the influence of lubricating oil on the gas compression process can be avoided, ensuring the purity and quality of the compressed gas.

[0228] For example, the compression mechanism 330 adopts a vane type structure. The cylinder of the compressor structure 330 is provided with vanes and rollers. The vanes are movably disposed in the vane groove. One end of the vanes abuts against the rollers and the rollers separate the cylinder into an intake chamber side and an exhaust chamber side.

[0229] Hereinafter, with reference to the accompanying drawings, a horizontal rotary compressor 1000 according to a third aspect embodiment of the present application will be described.

[0230] As shown in Figures 7 and 17, the horizontal rotary compressor 1000 according to an embodiment of this application includes a housing 100, on which an air inlet 100a is formed. Gas to be compressed, such as refrigerant, can flow into the housing 100 through the air inlet 100a. For example, an air outlet (not shown) may also be formed on the housing 100, through which the compressed gas can be discharged from the horizontal rotary compressor 1000.

[0231] As shown in Figures 7 and 17, the horizontal rotary compressor 1000 also includes a support 200 and a compression mechanism 330. The support 200 is disposed on the housing 100 and divides the interior of the housing 100 into a low-pressure chamber 130 and a high-pressure chamber 140. The low-pressure chamber 130 is connected to the air inlet 100a. The compression mechanism 330 is disposed in the high-pressure chamber 140 and has at least one compression chamber 333. For example, the compression mechanism 330 is used to compress the adsorbed gas into high-pressure gas. The outlet of the compression chamber 333 is connected to the high-pressure chamber 140. The refrigerant at the air inlet 100a can flow into the low-pressure chamber 130, and then be compressed by the compression structure in the compression chamber 333 before being discharged from the horizontal rotary compressor 1000 through the high-pressure chamber 140.

[0232] As can be seen, the aforementioned partitioning of the bracket 200 facilitates the use of the low-pressure chamber 130 as a liquid storage chamber for the horizontal rotary compressor 1000 to a certain extent. Therefore, the horizontal rotary compressor 1000 of this application embodiment can be applied to scenarios without a liquid storage structure. Furthermore, if the horizontal rotary compressor 1000 is an electric compressor, it may also include a motor structure (not shown in the figure). The motor structure can be used to drive the compression mechanism 330 to compress the refrigerant. In this case, the low-pressure chamber 130 provides space for the motor structure. Thus, the bracket 200 can isolate the high-temperature and high-pressure gas in the high-pressure chamber 140 from the thermal impact on the motor structure, reducing the risk of motor performance degradation or even damage due to overheating. This helps to reduce the operating temperature of the motor structure, alleviate the heat dissipation burden, extend the service life of the motor structure, improve the working stability and reliability of the horizontal rotary compressor 1000, and reduce the risk of shutdown of the horizontal rotary compressor 1000 due to motor structure failure.

[0233] Exemplarily, the housing 100 includes a first housing 110 and a second housing 120 disposed opposite each other along the axial direction of the horizontal rotary compressor 1000. An air inlet 100a is formed on the first housing 110, and an air outlet is formed on the second housing 120. A low-pressure chamber 130 is defined between the support 200 and the first housing 110, and the low-pressure chamber 130 communicates with the air inlet 100a. A high-pressure chamber 140 is defined between the support 200 and the second housing 120, and the high-pressure chamber 140 communicates with the air outlet. Referring to the figures, in this application, the direction of extension of the central axis L of the horizontal rotary compressor 1000 is referred to as the axial direction of the horizontal rotary compressor 1000. In the radial plane, the direction passing through the central axis L of the horizontal rotary compressor 1000 is referred to as the radial direction of the horizontal rotary compressor 1000, and the direction surrounding the central axis L is referred to as the circumferential direction of the horizontal rotary compressor 1000.

[0234] As shown in Figures 7-11 and 25-27, the horizontal rotary compressor 1000 also includes a filter structure 700, which is located between the air inlet 100a and the inlet 333a of the compression chamber 333. The filter structure 700 can filter the refrigerant flowing into the compression chamber 333.

[0235] Therefore, by setting up the filter structure 700, the risk of impurities entering the compression mechanism 330 is reduced, ensuring the cleanliness of the internal environment of the compression mechanism 330 and the purity of the working medium, reducing the maintenance cost and failure rate of the horizontal rotary compressor 1000, and making it suitable for scenarios with high sensitivity to impurities; and for the high-precision compression mechanism 330, it improves the problem of impurities entering the compression mechanism 330 and causing blockage, and improves the operational reliability and stability of the horizontal rotary compressor 1000.

[0236] The main function of the filter structure 700 is to act as a barrier, intercepting impurities in the gas before it enters the compression chamber 333. This pre-filtration mechanism ensures that only purified refrigerant can enter the compression chamber 333 for further compression, thereby avoiding contamination of the compressed gas quality by impurities. It also reduces potential damage to the compression mechanism 330, such as wear and stalling, and extends the service life of the horizontal rotary compressor 1000.

[0237] Therefore, the number and specific location of the filter structures 700 can be flexibly adjusted according to requirements. There can be one or more filter structures 700. When there are multiple filter structures 700, they can be arranged sequentially along the airflow direction to filter the refrigerant multiple times before it enters the compression chamber 333. Taking one filter structure 700 as an example: the filter structure 700 is set inside the housing 100, which is beneficial for making reasonable use of the internal space of the housing 100 and reducing the space occupied by the horizontal rotary compressor 1000; the filter structure 700 can be directly set at the air inlet 100a of the horizontal rotary compressor 1000; or, the filter structure 700 can be set at the inlet 333a of the compression chamber 333; or, the filter structure 700 can be located downstream of the air inlet 100a of the horizontal rotary compressor 1000 and upstream of the inlet 333a of the compression chamber 333 (for example, the filter structure 700 is set in the low-pressure chamber 130, or the filter structure 700 is set at the air intake channel 211 described later).

[0238] In related technologies, the filter structure is located on the liquid receiver. However, for compressors without a liquid receiver, it is difficult to improve problems such as wear and stalling of the compression mechanism 330. Obviously, the filter structure 700 in the above-mentioned solution of this application makes the horizontal rotary compressor 1000 applicable to scenarios without a liquid receiver.

[0239] As shown in Figures 8, 9, 11 and 28, the filter structure 700 includes a mounting frame 710 and a filter screen 720. The filter screen 720 is mounted on the mounting frame 710 and is formed into a cylindrical structure. The two axial ends of the filter screen 720 are an upstream end 720a and a downstream end 720b, respectively. The mounting frame 710 closes the downstream end 720b of the filter screen 720.

[0240] As can be seen, the filter structure 700 can be installed through the mounting bracket 710, and the two ends of the filter screen 720 are open to form openings. The opening at the upstream end 720a allows airflow to flow into the filter screen 720, and the mounting bracket 710 closes the opening at the downstream end 720b. The airflow into the filter screen 720 can pass through the filter screen 720 in a roughly radial direction and be filtered by the filter screen 720. Thus, the airflow at the opening at the upstream end 720a can flow roughly in the axial direction of the filter screen 720, and the refrigerant passing through the filter screen 720 will not flow directly towards the filter screen 720, which helps to reduce the impact of the airflow on the filter screen 720 during the process of flowing through the filter screen 720. Furthermore, since the mounting bracket 710 encloses the downstream end 720b of the filter screen 720, a portion of the impact of the airflow on the filter structure 700 is applied to the mounting bracket 710. This allows the mounting bracket 710 to withstand this impact, further reducing the impact on the filter screen 720 and improving reliability. It also helps to reduce the installation requirements of the filter screen 720, eliminating the need for the filter screen 720 to be tightly fitted with other components to ensure that all refrigerant flowing to the compression chamber 333 passes through the filter screen 720 before reaching the compression chamber 333. This simplifies the installation of the filter structure 700.

[0241] In this embodiment, the connection method between the mounting bracket 710 and the filter screen 720 is not specifically limited. For example, the mounting bracket 710 and the filter screen 720 can be connected by injection molding or welding. The axial direction of the filter screen 720 can be parallel to the axial direction of the horizontal rotary compressor 1000 (as shown in Figures 1-6), or the axial direction of the filter screen 720 can also form a non-zero angle with the axial direction of the horizontal rotary compressor 1000.

[0242] In some embodiments, as shown in Figures 7-11 and 25, the mounting bracket 710 includes a first skeleton portion 711, a perforated portion 712, and a second skeleton portion 713 connected sequentially along the axial direction of the filter screen 720. The first skeleton portion 711 is formed into a ring structure, the filter screen 720 is disposed in the perforated portion 712, and the two axial ends of the filter screen 720 are respectively connected to the first skeleton portion 711 and the second skeleton portion 713. The second skeleton portion 713 closes one axial end of the filter screen 720. Thus, the internal space of the first skeleton portion 711 can correspond to the inlet of the filter structure 700, which facilitates the filter structure 700 to filter all airflow flowing to the compression chamber 333. Moreover, the mounting bracket 710 can support the filter screen 720 as a whole to maintain the shape of the filter screen 720, which helps to improve the reliability of the filter structure 700.

[0243] In this embodiment, the structure of the perforated portion 712 is not specifically limited. It is sufficient that the perforated portion 712 has a channel connecting its interior and exterior, so that the airflow entering the filter screen 720 can pass through the filter screen 720 and smoothly exit the filter structure 700. For example, the perforated portion 712 may include multiple connecting rods spaced circumferentially along the first skeleton portion 711. The two ends of each connecting rod are respectively connected to the first skeleton portion 711 and the second skeleton portion 713. The space between two adjacent connecting rods can form a channel connecting the interior and exterior of the perforated portion 712. The airflow entering the filter screen 720 can pass through this channel and exit the filter screen 720. The perforated portion 712 has a simple structure, facilitates reliable support for the filter screen 720, and has relatively little obstruction to airflow.

[0244] In some embodiments, as shown in Figures 8, 9, and 11, the horizontal rotary compressor 1000 further includes a main bearing 310, which is sandwiched between the support 200 and the compression mechanism 330. The compression chamber 333 is connected to the low-pressure chamber 130 through the intake passage 211, which passes through the support 200 and the main bearing 310. The compression mechanism 330 forms a mating cavity 335, which connects the intake passage 211 and at least one compression chamber 333. A filter structure 700 passes through the intake passage 211 and the mating cavity 335. The filter screen 720 is radially opposite to the inlet 333a of the at least one compression chamber 333 (the compression chamber 333 connected to the mating cavity 335). The peripheral wall of the filter screen 720 is opposite to the inlet 333a.

[0245] Therefore, it is beneficial to reduce the obstruction of the airflow at the inlet 333a by the mounting bracket 710, and it is not easy to excessively reduce the airflow area due to the setting of the filter structure 700, and it will not excessively increase the airflow resistance, so as to ensure the smooth flow of airflow. In particular, when the mounting bracket 710 includes the first skeleton part 711, the hollow part 712 and the second skeleton part 713, the second skeleton part 713 is located in the mating cavity 335 and is staggered from the inlet 333a, so that the second skeleton part 713 will not block the airflow at the inlet 333a, nor will it block the airflow in the air intake channel 211 and the mating cavity 335.

[0246] For example, as shown in Figures 8, 9, 11, 15 and 16, the compression mechanism 330 includes a first cylinder 331, a second cylinder 332 and a partition plate 334. The mating cavity 335 passes through the first cylinder 331 and the partition plate 334 and extends into the second cylinder 332, so that the mating cavity 335 communicates with the compression cavity 333 of the first cylinder 331 and also communicates with the compression cavity 333 of the second cylinder 332. The inlet 333a of the first cylinder 331 and the inlet 333a of the second cylinder 332 are both radially opposite to the filter screen 720 of the filter structure 700, so that the refrigerant filtered by the filter structure 700 can be distributed to the first cylinder 331 and the second cylinder 332. For example, the mounting bracket 710 includes a first skeleton part 711, a hollow part 712, and a second skeleton part 713. The first skeleton part 711 does not extend into the mating cavity 335. At least a portion of the hollow part 712 and the second skeleton part 713 are located inside the mating cavity 335. Since the filter screen 720 is opposite to the inlet 333a, the first skeleton part 711 and the second skeleton part 713 are both offset from the inlet 333a.

[0247] In some embodiments, as shown in Figures 7 and 8, a third mounting groove 2111 is formed on the wall of the bracket 200 corresponding to the air intake channel 211. The third mounting groove 2111 passes through one end of the bracket 200 facing the main bearing 310. The mounting bracket 710 is limited and fitted into the third mounting groove 2111 to restrict the axial movement of the filter structure 700, thereby improving the installation reliability of the filter structure 700. Moreover, the filter structure 700 can be inserted into the third mounting groove 2111 along the direction of the main bearing 310 toward the bracket 200, thereby reducing the length of the filter structure 700 when fitted into the bracket 200, which is beneficial to improving the installation convenience of the filter structure 700. Exemplarily, the mounting bracket 710 includes a first skeleton portion 711, a hollow portion 712, and a second skeleton portion 713. The first skeleton portion 711 is limited and fitted into the third mounting groove 2111, and the filter screen 720 and the hollow portion 712 pass through the main bearing 310.

[0248] Of course, the installation configuration of the filter structure 700 is not limited to this. In other embodiments, as shown in Figures 9 and 25, the mounting bracket 710 has a first outward protrusion 700a, which is sandwiched between the bracket 200 and the main bearing 310. The first outward protrusion 700a can be formed by a portion of the outer peripheral wall of the mounting bracket 710 protruding radially outward along the filter screen 720. For example, the first outward protrusion 700a can be formed as a rib extending in an annular shape along the circumference of the filter screen 720. Thus, the axial movement of the filter structure 700 can also be restricted, achieving reliable installation of the filter structure 700.

[0249] It is understood that the first protrusion 700a can be located at the end of the mounting bracket 710 in the axial direction of the filter screen 720, or the first protrusion 700a and the two ends of the mounting bracket 710 in the axial direction of the filter screen 720 can be spaced apart respectively; at least one of the bracket 200 and the main bearing 310 is fixedly connected to the first protrusion 700a, or neither the bracket 200 nor the main bearing 310 is connected to the first protrusion 700a. In this case, the first protrusion 700a can be clamped and fixed by the connecting force of the fixed connection between the bracket 200 and the main bearing 310, so as to realize the installation of the filter structure 700.

[0250] For example, the first protrusion 700a is located at the end of the mounting bracket 710 in the axial direction of the filter screen 720. Since the filter screen 720 is opposite to the inlet 333a of the compression chamber 333, the first protrusion 700a is located at the end of the mounting bracket 710 away from the downstream end 720b of the filter screen 720. At this time, the filter structure 700 can pass through the part of the main bearing 310 corresponding to the air intake channel 211 and the mating cavity 335, but not through the part of the bracket 200 corresponding to the air intake channel 211. For example, the mounting bracket 710 includes a first skeleton part 711, a hollow part 712 and a second skeleton part 713 connected sequentially along the axial direction of the filter screen 720. The first protrusion 700a is formed at the end of the first skeleton part 711 away from the second skeleton part 713. The filter screen 720 and the hollow part 712 pass through the main bearing 310. Of course, the first protrusion 700a can also be spaced between the two ends of the mounting bracket 710 in the axial direction of the filter screen 720. In this case, the filter structure 700 can be inserted into the part of the bracket 200 corresponding to the air intake channel 211, the part of the main bearing 310 corresponding to the air intake channel 211, and the mating cavity 335.

[0251] In some embodiments, as shown in Figures 10 and 11, a heat insulation cover 360 is provided on the side of the bracket 200 away from the main bearing 310. This heat insulation cover 360 separates at least a portion of the uncompressed low-temperature refrigerant in the low-pressure chamber 130 from the high-temperature bracket 200, which helps to reduce the heat transfer from the bracket 200 toward the low-temperature refrigerant in the low-pressure chamber 130, thereby reducing the heat loss during suction and improving the energy efficiency of the horizontal rotary compressor 1000.

[0252] For example, the thermal conductivity of the heat shield 360 may be less than that of the bracket 200.

[0253] The mounting bracket 710 is fixedly connected to the heat insulation cover 360, through which the filter structure 700 is installed; and / or, the filter structure 700 has a second outward protrusion 700b sandwiched between the heat insulation cover 360 and the bracket 200. The second outward protrusion 700b can be formed by a portion of the outer peripheral wall of the mounting bracket 710 protruding radially outward along the filter screen 720. For example, the second outward protrusion 700b can be formed as a rib extending in an annular shape along the circumference of the filter screen 720. Thus, reliable installation of the filter structure 700 can also be achieved, and the installation method is flexible.

[0254] It is understood that the second protrusion 700b can be located at the end of the mounting bracket 710 in the axial direction of the filter screen 720, or the second protrusion 700b and the two ends of the mounting bracket 710 in the axial direction of the filter screen 720 can be spaced apart respectively; at least one of the heat insulation cover 360 and the bracket 200 is fixedly connected to the second protrusion 700b, or neither the heat insulation cover 360 nor the bracket 200 is connected to the second protrusion 700b. In this case, the second protrusion 700b can be clamped and fixed by the connection force of the fixed connection between the heat insulation cover 360 and the bracket 200, so as to realize the installation of the filter structure 700.

[0255] For example, the second protrusion 700b is located at the end of the mounting bracket 710 in the axial direction of the filter screen 720. Since the filter screen 720 is opposite to the inlet 333a of the compression chamber 333, the second protrusion 700b is located at the end of the mounting bracket 710 away from the downstream end 720b of the filter screen 720. At this time, the filter structure 700 can pass through the part of the main bearing 310 corresponding to the air intake channel 211 and the mating cavity 335, but does not pass through the part of the bracket 200 corresponding to the air intake channel 211. For example, the mounting bracket 710 includes a first skeleton part 711, a hollow part 712 and a second skeleton part 713 connected sequentially along the axial direction of the filter screen 720. The second protrusion 700b is formed at the end of the first skeleton part 711 away from the second skeleton part 713. Of course, the first protrusion 700a can also be spaced between the two ends of the mounting bracket 710 in the axial direction of the filter screen 720. In this case, the filter structure 700 can be inserted into the part of the bracket 200 corresponding to the air intake channel 211, the part of the main bearing 310 corresponding to the air intake channel 211, and the mating cavity 335.

[0256] Furthermore, when the mounting bracket 710 is fixedly connected to the heat insulation cover 360, at least a portion of the mounting bracket 710 can be integrally formed into the heat insulation cover 360, or the mounting bracket 710 and the heat insulation cover 360 are separate parts and connected by assembly means.

[0257] For the various installation schemes of the above-mentioned filter structure 700, whether through the third mounting groove 2111, the first protrusion 700a, the heat insulation cover 360, or the second protrusion 700b, in the direction from the high pressure chamber 140 to the low pressure chamber 130, it is easy to ensure that the filter structure 700 does not exceed the end face of the support 200 away from the compression mechanism 330, or the size of the filter structure 700 exceeding the end face of the support 200 away from the compression mechanism 330 can be controlled. This is beneficial to reduce the occupancy of the filter structure 700 on the low pressure chamber 130. If the horizontal rotary compressor 1000 is an electric compressor, it is easy to provide sufficient space for the motor structure in the low pressure chamber 130, and at the same time, the motor structure is less likely to interfere with the filter structure 700.

[0258] In some embodiments, as shown in FIG11, a heat shield 360 is provided on the side of the bracket 200 opposite to the main bearing 310. A positioning hole 360a is formed on the heat shield 360. The end of the mounting bracket 710 extends out of the air inlet channel 211, and the aforementioned end of the mounting bracket 710 is positioned and fitted into the positioning hole 360a. This facilitates the rapid assembly and positioning of the mounting bracket 710 and the heat shield 360, which helps to improve assembly efficiency.

[0259] For example, the mounting bracket 710 includes a first skeleton part 711, a hollow part 712 and a second skeleton part 713 connected sequentially along the axial direction of the filter screen 720. The first skeleton part 711 extends out of the air intake channel 211 in a direction away from the main bearing 310, and the end of the first skeleton part 711 away from the second skeleton part 713 is engaged with the positioning hole 360a.

[0260] In some embodiments, as shown in Figures 27 and 28, the filter structure 700 is fixed at the air inlet 100a, and the downstream end 720b of the filter screen 720 extends into the low-pressure chamber 130. At least a portion of the filter screen 720 is located within the low-pressure chamber 130, so the airflow exiting from the filter screen 720 is not restricted within the air inlet 100a. This facilitates ensuring that the airflow area at the air inlet 100a is not excessively reduced due to the filter structure 700 being installed at the air inlet 100a, and that the airflow resistance is not excessively increased, thus ensuring smooth airflow. In particular, when the mounting bracket 710 includes a first skeleton portion 711, a hollow portion 712, and a second skeleton portion 713, the second skeleton portion 713 is also located within the low-pressure chamber 130, rather than within the air inlet 100a. The second skeleton portion 713 will not cause significant obstruction to the airflow within the air inlet 100a, and will not excessively reduce the airflow area at the air inlet 100a.

[0261] In some embodiments, as shown in FIG28, a second mounting groove 100b is formed on the peripheral wall of the air inlet 100a. The second mounting groove 100b penetrates the outer surface of the housing 100. The mounting bracket 710 is positioned and fitted into the second mounting groove 100b to limit the axial movement of the filter structure 700, thereby improving the installation reliability of the filter structure 700. Furthermore, the filter structure 700 can be inserted into the second mounting groove 100b from the outside to the inside along the axial direction of the air inlet 100a, facilitating the installation convenience of the filter structure 700. Exemplarily, the mounting bracket 710 includes a first skeleton portion 711, a hollow portion 712, and a second skeleton portion 713. The first skeleton portion 711 is positioned and fitted into the second mounting groove 100b.

[0262] In some embodiments, as shown in Figures 12-16, the horizontal rotary compressor 1000 further includes a main bearing 310, which is sandwiched between the support 200 and the compression mechanism 330. The main bearing 310 can serve as a component that bears radial and axial loads, supporting the rotational movement of the compression mechanism 330 and facilitating the stability and reliability of the compression mechanism 330 under high-speed operation. The compression chamber 333 is connected to the low-pressure chamber 130 through the intake channel 211, which passes through the support 200 and the main bearing 310. The main bearing 310 and the support 200 define a first exhaust chamber 150 that communicates with the compression chamber 333. The refrigerant that has been compressed in the compression chamber 333 can flow directly or indirectly into the first exhaust chamber 150.

[0263] The horizontal rotary compressor 1000 also includes a second sealing structure 500, which is located between the support 200 and the main bearing 310 and surrounds the intake channel 211 to separate the first exhaust chamber 150 from the intake channel 211. The second sealing structure 500 also separates the first exhaust chamber 150 from the low-pressure chamber 130 to prevent gas from being discharged through the intake channel 211, thus preventing air leakage. This achieves static sealing of the intake of the horizontal rotary compressor 1000, ensuring that gas can be smoothly drawn into the compression mechanism 330 through the intake channel 211 and discharged to the outlet through the first exhaust chamber 150. This improves the efficiency reduction and pressure fluctuation of the horizontal rotary compressor 1000. Compared with the direct contact sealing method used in some technologies, the above arrangement also helps to reduce the processing requirements of the sealing position between the support 200 and the main bearing 310, reducing the processing difficulty.

[0264] As can be seen, the low-pressure chamber 130 can be connected to the compression chamber 333 through the air intake channel 211. The refrigerant in the low-pressure chamber 130 flows through the air intake channel 211 and then flows to the compression chamber 333. During this process, the refrigerant does not need to flow through the external space of the housing 100, which simplifies the sealing settings on the housing 100.

[0265] In some embodiments, as shown in Figures 13-16, the filter structure 700 is disposed at the intake channel 211. For example, a part of the filter structure 700 may be located inside the intake channel 211 so as to achieve refrigerant filtration on the upstream side of the inlet 333a of the compression chamber 333. In this case, the second sealing structure 500 is sleeved outside the filter structure 700, so the filter structure 700 can limit the radial displacement of the second sealing structure 500 to a certain extent, which is beneficial to improving the installation reliability and sealing performance of the second sealing structure 500.

[0266] Furthermore, the second sealing structure 500 is sleeved outside the mounting bracket 710. The mounting bracket 710 can better limit the second sealing structure 500 relative to the filter screen 720, so as to further improve the installation stability of the second sealing structure 500.

[0267] For example, as shown in Figures 13-16, the mounting bracket 710 includes a first skeleton portion 711, a hollow portion 712, and a second skeleton portion 713. A filter screen 720 is disposed in the hollow portion 712, and the two axial ends of the filter screen 720 are respectively connected to the first skeleton portion 711 and the second skeleton portion 713. A second sealing structure 500 is sleeved outside the first skeleton portion 711, or the second sealing structure 500 is sleeved outside the hollow portion 712. For example, when the first skeleton portion 711 is limited and fitted into the third mounting groove 2111 on the bracket 200, if the first skeleton portion 711 does not extend into the main bearing 310, the second sealing structure 500 is sleeved outside the hollow portion 712 (as shown in Figure 13); if the first skeleton portion 711 extends into the main bearing 310, the second sealing structure 500 is sleeved outside the first skeleton portion 711 (as shown in Figures 15 and 16).

[0268] In some embodiments, as shown in Figures 13-16, a second mounting groove 312 is formed between the bracket 200 and the main bearing 310, surrounding the air intake channel 211. The second sealing structure 500 is disposed in the second mounting groove 312. The second mounting groove 312 can limit the movement range of the second sealing structure 500 so that the second sealing structure 500 can fit tightly against the surface that needs to be sealed, which is beneficial to improving the sealing performance. At the same time, it is convenient to achieve the pre-positioning of the second sealing structure 500 and facilitates assembly.

[0269] It is understood that the second mounting groove 312 can be formed on the main bearing 310 (as shown in Figures 13-16), or the second mounting groove 312 can be formed on the bracket 200, or the main bearing 310 can have a first groove and the bracket 200 can have a second groove, and the first groove and the second groove can be joined together to form the second mounting groove 312.

[0270] For example, as shown in Figure 16, the second mounting groove 312 communicates with the first exhaust chamber 150. The second sealing structure 500 is a single piece and includes a second mounting portion 530, a third sealing portion 540, and a fourth sealing portion 550, each formed as an annular shape. The third sealing portion 540 and the fourth sealing portion 550 are both connected to the outer peripheral wall of the second mounting portion 530, and are spaced apart along the axial direction of the second mounting portion 530, so that a second groove 500a is defined between the second mounting portion 530, the third sealing portion 540, and the fourth sealing portion 550. The third sealing portion 540 abuts against the bracket 200, and the fourth sealing portion 550 abuts against the main bearing 310. Thus, there is a certain gap between the third sealing portion 540 and the fourth sealing portion 550. This gap can allow for a certain deformation space between them, making the second sealing structure 500 compressible, so that the third sealing portion 540 and the fourth sealing portion 550 respectively tightly abut against the bracket 200 and the main bearing 310.

[0271] Furthermore, since the second mounting groove 312 is connected to the first exhaust chamber 150, the opening of the second groove 500a can be set towards the position where the second mounting groove 312 and the first exhaust chamber 150 are connected. The high-pressure gas in the first exhaust chamber 150 can act on the groove wall of the second groove 500a. The high-pressure gas can apply a force away from each other to the third sealing part 540 and the fourth sealing part 550, so that the third sealing part 540 is more tightly pressed against the bracket 200 and the fourth sealing part 550 is more tightly pressed against the main bearing 310, thereby improving the sealing performance of the second sealing structure 500.

[0272] Optionally, an elastic element (such as a spring) may be provided in the second groove 500a. The elastic element can apply a force away from each other to the third sealing part 540 and the fourth sealing part 550 to improve the sealing performance. Of course, the elastic element may not be provided in the second groove 500a.

[0273] For example, as shown in Figures 13-15, the second sealing structure 500 includes a support member 510 and a sealing member 520. The support member 510 is an annular structure, and the sealing member 520 is completely wrapped around the support member 510. Both the support member 510 and the sealing member 520 are arranged around the air intake channel 211, so the support member 510 is embedded in the sealing member 520 to improve the bonding strength between the support member 510 and the sealing member 520. The elastic modulus of the support member 510 is greater than that of the sealing member 520. Therefore, the support member 510 can provide support for the seal 520. The support member 510 can not only limit the range of movement of the seal 520, but also ensure that the seal 520 can maintain a certain position and shape when subjected to pressure through its shape and size, which helps to reduce the risk of displacement and excessive deformation of the second sealing structure 500. It can be seen that the support member 510 can serve as the skeleton of the second sealing structure 500. Its high elasticity module can make the seal 520 easy to maintain its shape and position stability when subjected to external force or vibration, and it is not easy to undergo excessive deformation. This stability is of great significance in preventing the seal 520 from shifting or failing under extreme working conditions.

[0274] Some technologies use O-rings alone as the sealing body, but due to insufficient support and restraint, they are prone to displacement or excessive deformation under external forces, leading to seal failure. Other technologies use an O-ring plus a retainer ring to restrict the movement of the O-ring; however, this sealing method is more complex, and the reliability of the O-ring and retainer ring fit needs improvement. In the solution described in this application, the seal 520 is completely wrapped around the support 510, forming a soft and elastic sealing layer. This allows the seal 520 to better adapt to the sealing surface, achieving a tighter fit, and the seal 520 is less likely to detach from the support 510.

[0275] To better adapt to complex sealing surface shapes or meet specific sealing requirements, the cross-sectional shape of the support 510 can be designed as an irregular shape. These irregular shapes can be customized according to the specific contour of the sealing surface to ensure that the seal 520 can fit tightly and provide an effective seal. In some alternative embodiments, the cross-sectional shape of the support 510 can be a circle, a semi-circle, a triangle, a rectangle, or other polygonal or irregular shapes.

[0276] Optionally, the support component 510 can be made of metal or plastic, and the seal 520 can be made of rubber. Metal components offer high strength, good wear resistance, and excellent thermal stability, maintaining stable shape and performance under various operating conditions, providing a solid support foundation for the seal 520. Furthermore, metal components have good machinability, allowing for precise dimensional and shape design as needed. On the other hand, plastic components offer advantages such as light weight, low cost, and corrosion resistance, making them particularly suitable for the design of the horizontal rotary compressor 1000, where weight and cost are critical. Additionally, plastic components can be used in injection molding and other processes to achieve complex shape designs, further enhancing the adaptability of the second sealing structure 500. The seal 520, being made of rubber, effectively prevents gas leakage. This is because rubber components possess excellent elasticity, sealing properties, and corrosion resistance. In the horizontal rotary compressor 1000, the seal 520 can fit tightly between the support 200 and the main bearing 310, thereby preventing gas leakage.

[0277] In some embodiments, as shown in FIG14, at least one of the two axial ends of the seal 520 has an annular rib 521. The annular rib 521 can be arranged around the intake passage 211. The annular rib 521 abuts tightly against the bracket 200 or the main bearing 310, which helps to improve the sealing performance of the second sealing structure 500. Optionally, the axial direction of the seal 520 (i.e., the axial direction of the second sealing structure 500) can be parallel to the axial direction of the horizontal rotary compressor 1000. Of course, in other examples, the axial direction of the seal 520 can also form a non-zero angle with the axial direction of the horizontal rotary compressor 1000.

[0278] It is understood that, for the axial end of the seal 520 where the annular rib 521 is provided, there can be one or more annular ribs 521. Multiple annular ribs 521 located at the same axial end of the seal 520 can be arranged coaxially along the radial direction of the seal 520.

[0279] Optionally, as shown in Figure 14, the annular rib 521 is offset from the support member 510 in the radial direction of the seal 520. Therefore, the axial thickness of the portion of the seal 520 corresponding to the annular rib 521 is greater than the circumferential thickness of the portion corresponding to the support member 510. The portion of the seal 520 corresponding to the annular rib 521 experiences a larger compressive force. The radial offset between the annular rib 521 and the support member 510 facilitates the reduction of the compressive force between them. Under the same compression, this helps to decrease the compressive force on both the support member 510 and the seal 520, thus improving the stress distribution on the second sealing structure 500.

[0280] In some embodiments, as shown in Figures 17 and 18, the horizontal rotary compressor 1000 further includes a main bearing 310 and a crankshaft 340. The main bearing 310 is sandwiched between a support 200 and a compression mechanism 330. A first exhaust chamber 150 communicating with the compression chamber 333 is defined between the main bearing 310 and the support 200. A first mounting groove 2121 communicating with the first exhaust chamber 150 is formed between the main bearing 310 and the support 200. It can be understood that the first mounting groove 2121 may be formed on the main bearing 310, or the first mounting groove 2121 may be formed on the support 200 (as shown in Figure 18), or a third groove may be formed on the main bearing 310, and a fourth groove may be formed on the support 200, with the third and fourth grooves joined together to form the first mounting groove 2121.

[0281] In the above scheme, the low-pressure chamber 130 and the compression chamber 333 can be connected through the air intake channel 211 mentioned above, or the housing 100 is provided with a connecting pipe, and the low-pressure chamber 130 is connected to the compression chamber 333 through the connecting pipe.

[0282] The horizontal rotary compressor 1000 also includes a crankshaft 340, which passes through the compression mechanism 330 and the main bearing 310 and extends into the low-pressure chamber 130 through a second through hole 212 on the bracket 200. For example, the motor structure of the horizontal rotary compressor 1000 is located in the low-pressure chamber 130, and the portion of the crankshaft 340 extending into the low-pressure chamber 130 is connected to the motor structure for transmission. A first mounting groove 2121 is provided around the crankshaft 340.

[0283] The horizontal rotary compressor 1000 also includes a first sealing structure 400. The first sealing structure 400 is disposed in the first mounting groove 2121 and separates the first exhaust chamber 150 and the low-pressure chamber 130. The first sealing structure 400 is also arranged around the crankshaft 340 to improve air leakage and to limit the range of movement of the first sealing structure 400, thereby improving installation reliability and convenience. The first sealing structure 400 includes a first mounting portion 410, a first sealing portion 420, and a second sealing portion 430, which are respectively formed in annular shape. The first sealing portion 420 and the second sealing portion 430 are both connected to the first mounting portion 410 and are spaced apart, so that a mating groove 440 is defined between the first mounting portion 410, the first sealing portion 420, and the second sealing portion 430. The opening of the mating groove 440 is positioned facing the first mounting groove 2121 and communicating with the first exhaust chamber 150. The first sealing portion 420 abuts against the bracket 200, and the second sealing portion 430 abuts against the main bearing 310.

[0284] For example, the first sealing part 420 directly contacts the bracket 200, and the second sealing part 430 directly contacts the main bearing 310, achieving a static seal between the bracket 200 and the main bearing 310. Since the main bearing 310 bears significant radial and axial loads during the operation of the horizontal rotary compressor 1000 and moves along with the rotation of the crankshaft 340, it exerts a certain compressive force on the second sealing part 430. Due to the fitting groove 440, the first sealing part 420 and the second sealing part 430 can be finely adjusted within the fitting groove 440 range. This fine adjustment enhances their elastic response and ensures a continuous seal between the first sealing structure 400 and the sealing surface.

[0285] Since the first mounting groove 2121 is connected to the first exhaust chamber 150, and the opening of the mating groove 440 is positioned facing the connection between the first mounting groove 2121 and the first exhaust chamber 150, the high-pressure gas in the first exhaust chamber 150 can act on the groove wall of the mating groove 440. This high-pressure gas can exert a force on the first sealing part 420 and the second sealing part 430, moving them away from each other, thus making the seal between the first sealing part 420 and the second sealing part 430 tighter and improving the sealing performance of the first sealing structure 400. This adaptive tight fit not only effectively improves the reliability of the seal, making the first sealing structure 400 suitable for high-pressure environments, but also compensates to some extent for the decrease in sealing performance caused by material aging, wear, and other factors, thereby improving the reliability of the horizontal rotary compressor 1000.

[0286] Optionally, the first sealing structure 400 is a single piece.

[0287] In some embodiments, as shown in FIG18, the side of the first mounting portion 410 that is away from the first sealing portion 420 and the second sealing portion 430 abuts against the groove wall of the first mounting groove 2121. In this case, the groove wall of the first mounting groove 2121 can provide a certain support for the first sealing structure 400, restrict the displacement of the first sealing structure 400, and facilitate the sealing between the first mounting portion 410 and the corresponding groove wall of the first mounting groove 2121.

[0288] Furthermore, the high-pressure gas in the first exhaust chamber 150 can act on the groove wall of the mating groove 440, and the high-pressure gas can also exert a force on the first mounting part 410. This force makes the first mounting part 410 and the corresponding groove wall of the first mounting groove 2121 more tightly abut against each other, which is beneficial to improving the sealing performance of the first sealing structure 400. At the same time, it also helps to improve the accidental displacement of the first sealing structure 400 under high pressure environment to a certain extent, which is beneficial to improving the compatibility of the first sealing structure 400 with high pressure environment.

[0289] In some embodiments, as shown in FIG18, a first mounting groove 2121 is formed on one side surface of the bracket 200 corresponding to the first exhaust chamber 150. The first mounting groove 2121 can be formed by recessing a portion of the bracket 200 corresponding to the first exhaust chamber 150, so that the first mounting groove 2121 is open towards the first exhaust chamber 150. The main bearing 310 has a second hub portion 313 that mates with the crankshaft 340. The first mounting groove 2121 penetrates the wall of the second through hole 212, and the second hub portion 313 passes through the second through hole 212. At this time, the radially inner side of the first mounting groove 2121 is also open, while the second hub portion 313 can cover the radially inner side of the first mounting groove 2121. This arrangement helps to extend the axial mating length between the first sealing structure 400 and the second through hole 212. A longer mating length means that the first sealing structure 400 has a larger contact area in the axial direction, thereby better resisting the penetration and leakage of high-pressure gas.

[0290] For example, as shown in FIG18, the first mounting groove 2121 is open on the side of the crankshaft 340 facing the first exhaust cavity 150 and on the radially inner side of the first mounting groove 2121. The second hub portion 313 passes through the second through hole 212 to cover the radially inner side of the first mounting groove 2121. The first sealing portion 420 and the second sealing portion 430 can be arranged radially spaced along the crankshaft 340, and the first sealing portion 420 and the second sealing portion 430 are both connected to the side of the first mounting portion 410 facing the first exhaust cavity 150, so that the groove opening of the mating groove 440 is arranged axially along the crankshaft 340 towards the first exhaust cavity 150. Optionally, the side of the first mounting portion 410 away from the first exhaust cavity 150 can abut against the groove wall of the first mounting groove 2121 away from the first exhaust cavity 150.

[0291] Of course, the first mounting groove 2121 can also be spaced apart from the wall of the second through hole 212. In this case, the second hub portion 313 can at least partially abut against the side surface of the bracket 200 facing the first exhaust chamber 150 (the second hub portion 313 can pass through the second through hole 212 and part of the outer peripheral wall of the second hub portion 313 protrudes to form a step portion abutting against the bracket 200, or the entire second hub portion 313 abuts against the side of the bracket 200 away from the low-pressure chamber 130), and the second hub portion 313 covers a part of the first mounting groove 2121. The first mounting groove 2121 communicates with the first exhaust chamber 150 through the other part not covered by the second hub portion 313. At this time, the inner peripheral wall of the first mounting portion 410 can abut against the radial inner groove wall of the first mounting groove 2121.

[0292] In some embodiments, as shown in FIG18, the horizontal rotary compressor 1000 further includes an elastic element 450 disposed in the mating groove 440 and used to apply an elastic force away from each other to the first sealing portion 420 and the second sealing portion 430. When the horizontal rotary compressor 1000 is running, the first sealing portion 420 and the second sealing portion 430 may be subjected to different degrees of expansion or contraction due to changes in temperature and pressure. At this time, the elastic element 450 applies pressure to both through its elastic force to ensure that they are far apart from each other, and thus can always fit tightly against their respective sealing surfaces. This helps to improve the adaptability and reliability of the first sealing structure 400, and can also reduce energy loss and failure risk caused by poor sealing.

[0293] Optionally, the elastic element 450 is constructed to extend helically along the circumference of the crankshaft 340. In this case, the elastic element 450 can be made of a helical spring for easy processing. Of course, the elastic element 450 can also be constructed to extend in a reciprocating bending manner along the circumference of the crankshaft 340. It can be understood that the central axis of the crankshaft 340 coincides with the central axis of the horizontal rotary compressor 1000.

[0294] In some embodiments, as shown in Figures 2 and 17, the horizontal rotary compressor further includes a main bearing 310, which is sandwiched between the support 200 and the compression mechanism 330. The main bearing 310 and the support 200 define a first exhaust chamber 150 communicating with the compression chamber 333. The pump body structure 300 of the horizontal rotary compressor 1000 and the inner wall of the high-pressure chamber 150 (e.g., the inner surface of the second housing 120) define a second exhaust chamber 160 communicating with the outlet on the housing 100. A second exhaust passage 810 communicating with the first exhaust chamber 150 and the second exhaust chamber 160 is formed on the housing 100. This facilitates optimization of the gas flow path through the second exhaust chamber 160 and effectively reduces the impact of exhaust pulses on the internal structure of the horizontal rotary compressor 1000 by increasing the exhaust buffer space. This configuration makes the gas discharge process more stable, reduces vibration and noise caused by sudden airflow changes, and improves the overall operational stability of the horizontal rotary compressor 1000 and the user experience. As can be seen, in the above scheme, the refrigerant that has been compressed in the compression chamber 333 can flow sequentially through the first exhaust chamber 150, the second exhaust channel 810, and the second exhaust chamber 160, and then be discharged through the outlet. Due to the existence of airflow resistance, the pressure in the second exhaust chamber 160 is less than the pressure in the first exhaust chamber 150, so as to achieve the low back pressure design of the horizontal rotary compressor 1000.

[0295] It is understood that the pump body structure 300 may include the compression mechanism 330 and the main bearing 310 mentioned above; for example, the pump body structure 300 includes the main bearing 310, the compression mechanism 330 and the auxiliary bearing 320.

[0296] In some embodiments, as shown in FIG17, the compression mechanism 330 includes a first cylinder 331, a second cylinder 332 and a partition plate 334. The partition plate 334 is sandwiched between the first cylinder 331 and the second cylinder 332. The first cylinder 331 and the second cylinder 332 each have a compression chamber 333. The compression chamber 333 of the first cylinder 331 is connected to the first exhaust chamber 150. The compression chamber 333 of the second cylinder 332 is connected to the first exhaust chamber 150 through the third exhaust channel 820 on the pump body structure 300. As can be seen, the first cylinder 331 is located between the main bearing 310 and the partition plate 334. The refrigerant that has been compressed in the first cylinder 331 flows through the first exhaust chamber 150 to the second exhaust channel 810. The refrigerant that has been compressed in the second cylinder 332 flows through the third exhaust channel 820 and the first exhaust chamber 150 in sequence and then flows to the second exhaust channel 810. Thus, the refrigerant flowing out of the first cylinder 331 and the second cylinder 332 can converge in the first exhaust chamber 150.

[0297] The partition plate 334 not only serves as a physical isolation between the two cylinders but also enhances the structural stability of the horizontal rotary compressor 1000. It reduces mutual influence and vibration transmission between the cylinders, allowing both the first cylinder 331 and the second cylinder 331 to operate in a more stable environment. Therefore, this design not only extends the service life of the horizontal rotary compressor 1000 but also reduces noise caused by vibration.

[0298] The compression chamber 333 of the second cylinder 332 is connected to the first exhaust chamber 150 through the third exhaust passage 820 on the pump body structure 300. This design optimizes the exhaust process, ensuring that the gas can be smoothly discharged from the second cylinder 332 and merged into the first exhaust chamber 150, thereby making the exhaust process stable and reliable.

[0299] For example, the compression chamber 333 of the first cylinder 331 and the compression chamber 333 of the second cylinder 332 are both connected to the intake passage 211, which allows the first cylinder 331 and the second cylinder 332 to simultaneously / alternately draw in the gas to be compressed. This parallel compression operation mode can increase the gas handling capacity of the horizontal rotary compressor 1000, shorten the compression cycle, and thus improve the working efficiency of the horizontal rotary compressor 1000.

[0300] For example, the cylinder of the compression mechanism 330 is provided with a sliding vane and a roller. The sliding vane is movably disposed in the sliding vane groove, and one end of the sliding vane abuts against the outer peripheral wall of the roller, so as to cooperate with the roller to separate the space inside the cylinder into an intake chamber side and an exhaust chamber side.

[0301] In some embodiments, as shown in FIG17, the pump body structure 300 further includes a secondary bearing 320 and a muffler 350 disposed on the secondary bearing 320. The muffler cavity 351 between the muffler 350 and the secondary bearing 320 is formed as part of the third exhaust passage 820. A return oil cavity 172 communicating with the low-pressure cavity 130 is defined between the housing 100 and the secondary bearing 320. The return oil cavity 172 may be located at the end of the secondary bearing 320 away from the main bearing 310. The portion of the housing 100 that mates with the secondary bearing 320 may be spaced apart from the muffler 350. The horizontal rotary compressor 1000 further includes a third sealing structure 600. The third sealing structure 600 is an integral piece and is sealed between the muffler 350 and the secondary bearing 320, and between the housing 100 and the secondary bearing 320, so as to separate the muffler cavity 351 from the return oil cavity 172 and separate the second exhaust cavity 160 from the return oil cavity 172.

[0302] By placing the silencer 350 on the auxiliary bearing 320 within the pump body structure 300, this layout not only saves space but also achieves the dual functions of noise reduction and bearing support. This reduces the number of sealing structures and simplifies the structure and assembly of the horizontal rotary compressor 1000. The silencing cavity 351 between the silencer 350 and the auxiliary bearing 320, as part of the third exhaust passage 820, reduces noise generated during exhaust, enabling the horizontal rotary compressor 1000 to maintain a lower noise level during operation and providing a quieter environment for the user.

[0303] As shown in Figure 2, the third sealing structure 600 extends axially along the horizontal rotary compressor 1000 in cross-section. One axial end of the third sealing structure 600 seals between the silencer 350 and the auxiliary bearing 320, while the other end seals between the housing 100 and the auxiliary bearing 320. The integrated third sealing structure 600 separates the silencer chamber 351 from the oil return chamber 172, as well as the second exhaust chamber 160 from the oil return chamber 172. This reduces the number of sealing structures and simplifies the assembly process of the horizontal rotary compressor 1000. Therefore, the third sealing structure 600 improves the sealing efficiency inside the horizontal rotary compressor 1000, effectively preventing the mixing of gas and oil between different chambers and avoiding internal pressure leakage, thus ensuring stable operation and high efficiency of the horizontal rotary compressor 1000.

[0304] The oil return chamber 172 defined between the housing 100 and the auxiliary bearing 320 is a component of the lubrication system of the horizontal rotary compressor 1000. Lubricating oil in the gaps of the compression mechanism 330 can flow to the oil return chamber 803 and back to the low-pressure chamber 130. Lubricating oil in the low-pressure chamber 130 can flow with the refrigerant into the compression chamber 333, and then flow through the gaps of the compression mechanism 330 to the oil return chamber 172. This forms an internal circulation of lubricating oil, which is beneficial for improving lubrication. Furthermore, the layout of the oil return chamber 172 not only ensures the full recovery and utilization of lubricating oil but also reduces oil waste.

[0305] Hereinafter, with reference to the accompanying drawings, a horizontal rotary compressor 1000 according to an embodiment of the fourth aspect of this application will be described.

[0306] As shown in Figure 17, a horizontal rotary compressor 1000 according to an embodiment of this application includes a housing 100. For example, an inlet (not shown) and an outlet (not shown) are formed on the housing 100. The housing 100 serves to provide support for the main structure of the horizontal rotary compressor 1000. The inlet is used to introduce the gas to be compressed, while the outlet is responsible for discharging the compressed high-pressure gas.

[0307] For example, the air inlet and outlet are arranged at intervals along the axial direction of the horizontal rotary compressor 1000. Referring to Figure 17, this application refers to the extension direction of the central axis L of the horizontal rotary compressor 1000 as the axial direction of the horizontal rotary compressor 1000, and the direction passing through the central axis L of the horizontal rotary compressor 1000 in the radial plane as the radial direction of the horizontal rotary compressor 1000; the housing 100 includes a first housing 110 and a second housing 120 arranged sequentially along the axial direction of the horizontal rotary compressor 1000, with the air inlet located on the first housing 110 and the air outlet located on the second housing 120.

[0308] As shown in Figures 17 and 12, the horizontal rotary compressor 1000 also includes a support 200 and a pump body structure 300.

[0309] A bracket 200 is disposed on the housing 100, and the bracket 200 divides the interior of the housing 100 into a low-pressure chamber 130 and a high-pressure chamber 140. For example, the low-pressure chamber 130 can communicate with the air inlet, and the high-pressure chamber 140 can communicate with the air outlet. A communication channel 211 communicating with the low-pressure chamber 130 is formed on the bracket 200. Exemplarily, the low-pressure chamber 130 is directly connected to the air inlet and is responsible for receiving and initially guiding the gas to be compressed, while the high-pressure chamber 140 communicates with the air outlet and is the output channel after the gas is compressed to a high-pressure state.

[0310] In some optional embodiments, the horizontal rotary compressor 1000 also includes a motor structure (not shown), which is located within the low-pressure chamber 130. This separation isolates the support 200 from the thermal effects of the high-temperature, high-pressure gas in the high-pressure chamber 140 on other sensitive components within the housing 100, particularly the motor structure, preventing performance degradation or even damage due to overheating. This reduces the operating temperature of the motor structure, lessens the heat dissipation burden, extends its service life, improves the operational stability and reliability of the horizontal rotary compressor 1000, and reduces the risk of compressor downtime due to motor structure failure.

[0311] Furthermore, the aforementioned partitioning of the bracket 200 facilitates the use of the low-pressure chamber 130 as a liquid storage chamber for the horizontal rotary compressor 1000 to a certain extent, thus making the horizontal rotary compressor 1000 of this application applicable to scenarios without a liquid storage structure.

[0312] The connecting channel 211 on the support 200 serves as a bridge between the low-pressure chamber 130 and the compression mechanism 330, ensuring smooth and continuous gas flow. This design guarantees efficient gas compression, ensuring the high efficiency and reliability of the horizontal rotary compressor 1000, while not occupying external space of the housing 100. This contributes to the compact structure of the horizontal rotary compressor 1000 and facilitates miniaturization design.

[0313] As shown in Figures 12 and 17, the pump body structure 300 is located in the high-pressure chamber 140, and the pump body structure 300 includes a main bearing 310, a secondary bearing 320, and a compression mechanism 330. The compression mechanism 330 is sandwiched between the main bearing 310 and the secondary bearing 320, and has at least one compression chamber 333. The main bearing 310 is fixed to the bracket 200, and an exhaust chamber 150 communicating with the compression chamber 333 is defined between the main bearing 310 and the bracket 200. The exhaust chamber 150 is directly or indirectly connected to the exhaust side of the compression chamber 333. The exhaust chamber 150 is located in the high-pressure chamber 140, and an air intake channel 311 is formed on the main bearing 310, which connects the communication channel 211 and the compression chamber 333.

[0314] In the above technical solution, the compression mechanism 330, as part of the pump body structure 300, is responsible for compressing the intake gas and converting it into high-pressure gas. Since the compression mechanism 330 is sandwiched between the main bearing 310 and the auxiliary bearing 320, this arrangement not only provides stable support for the compression mechanism 330, but also ensures that the compression mechanism 330 maintains coaxiality during high-speed rotation, reducing vibration and noise.

[0315] The compression mechanism 330 has at least one compression chamber 333 inside. Gas compression is achieved by setting up the compression chamber 333. As the compression mechanism 330 operates, gas enters the compression chamber 333 from the inlet passage 311. After compression, both the pressure and temperature increase significantly. It is understood that there can be one or more compression chambers 333. When the compression mechanism 330 is designed with multiple compression chambers 333, these chambers are usually arranged in a certain order to form a multi-stage compression structure. This multi-stage arrangement of compression chambers 333 can significantly improve the efficiency of gas compression, but it is not limited to this.

[0316] The main bearing 310 and the auxiliary bearing 320 are components in the pump body structure 300 that bear radial and axial loads. They not only support the rotational movement of the compression mechanism 330, but also ensure the smoothness and reliability of the compression mechanism 330 under high-speed operation.

[0317] As shown in Figures 12 and 17, the horizontal rotary compressor 1000 also includes a second sealing structure 500. As shown in Figures 13-16, the second sealing structure 500 is located between the bracket 200 and the main bearing 310, and the second sealing structure 500 surrounds the intake channel 311 to separate the exhaust chamber 150 from the intake channel 311. The second sealing structure 500 also separates the exhaust chamber 150 from the connecting channel 211 and from the low-pressure chamber 130, so as to prevent gas from being discharged through the connecting channel 211 and the intake channel 311, that is, to prevent air leakage. This achieves the static sealing of the intake of the horizontal rotary compressor 1000, ensuring that the gas can be smoothly drawn into the compression mechanism 330 through the connecting channel 211 and the intake channel 311, and discharged to the outlet through the exhaust chamber 150. This improves the problems of reduced efficiency and pressure fluctuation of the horizontal rotary compressor 1000, and also helps to reduce the processing requirements of the sealing position between the bracket 200 and the main bearing 310, reducing the processing difficulty.

[0318] As can be seen, the low-pressure chamber 130 can be connected to the compression chamber 333 through the connecting channel 211 on the bracket 200 and the air intake channel 311 on the main bearing 310. The refrigerant in the low-pressure chamber 130 flows through the connecting channel 211 and the air intake channel 311 in sequence and then flows to the compression chamber 333. During this process, the refrigerant does not flow through the external space of the housing 100, which simplifies the sealing settings on the housing 100.

[0319] In some embodiments, as shown in Figures 13, 15, and 16, a second mounting groove 312 is formed between the bracket 200 and the main bearing 310, surrounding the intake passage 311, and the second sealing structure 500 is disposed in the second mounting groove 312. Thus, the second mounting groove 312 can limit the range of movement of the second sealing structure 500, ensuring that the second sealing structure 500 can fit tightly against the surface requiring sealing. This helps prevent gas leakage at the inlet of the intake passage 311, thereby improving the efficiency and performance of the horizontal rotary compressor 1000. Simultaneously, the design of the second mounting groove 312 makes the installation of the second sealing structure 500 simple and quick. During installation, the second sealing structure 500 only needs to be accurately placed into the second mounting groove 312 to complete the pre-positioning, thereby reducing the installation time, lowering the installation difficulty, and improving production efficiency.

[0320] It is understood that the second mounting groove 312 can be formed on the main bearing 310, or the second mounting groove 312 can be formed on the bracket 200 (as shown in Figures 12 and 13), or the main bearing 310 has a first groove and the bracket 200 has a second groove, and the first groove and the second groove are joined together to form the second mounting groove 312.

[0321] For example, the inner diameter of the second mounting groove 312 is slightly larger than the outer diameter of the air intake channel 311 to ensure that it does not obstruct the smooth passage of airflow. The depth and width of the second mounting groove 312 are determined according to the size of the second sealing structure 500 and the installation requirements, so as to ensure the stable installation of the second sealing structure 500 and avoid excessive gaps that would result in poor sealing performance.

[0322] For example, a second mounting groove 312 is formed on the side of the main bearing 310 facing the bracket 200. The bracket 200 covers part of the opening of the second mounting groove 312 so that the second mounting groove 312 communicates with the exhaust chamber 150. At this time, the second sealing structure 500 can be constructed as a plug seal as described below, or the second sealing structure 500 can be constructed as including a support member 510 and a seal member 520. Of course, the bracket 200 can also cover the entire opening of the second mounting groove 312. At this time, the second sealing structure 500 can be constructed as including a support member 510 and a seal member 520.

[0323] In traditional processes, O-rings are used as the sealing body. However, when used alone, O-rings lack sufficient support and restraint, making them prone to displacement or excessive deformation under external forces, leading to seal failure. Some technologies typically use an O-ring plus a retainer ring to limit the displacement of the O-ring, but this sealing method has a relatively complex structure.

[0324] To address the aforementioned issues, in some embodiments of this application, as shown in Figures 13 and 14, the second sealing structure 500 includes a support member 510 and a sealing member 520. The support member 510 has an annular structure, and the sealing member 520 is fully enclosed outside the support member 510. Both the support member 510 and the sealing member 520 are arranged around the air intake channel 311, thus the support member 510 is embedded within the sealing member 520 to improve the bonding strength between the support member 510 and the sealing member 520. The elastic modulus of the support member 510 is greater than that of the sealing member 520.

[0325] The improved second sealing structure 500 provides a solid support for the seal 520 by introducing a support member 510. The limiting function of the support member 510 not only restricts the range of movement of the seal 520, but also, through its shape and size design, ensures that the seal 520 maintains a certain position and shape under pressure, thereby reducing the risk of displacement and excessive deformation. It is evident that the support member 510, as the skeleton of the second sealing structure 500, ensures that the seal 520 maintains its shape and positional stability under external forces or vibrations, and is not prone to excessive deformation; this stability is crucial for preventing the seal 520 from shifting or failing under extreme operating conditions.

[0326] The seal 520 completely encloses the support 510, forming a soft and elastic sealing layer. This design allows the seal 520 to better adapt to the sealing surface, achieving a tighter fit. When the support 510 provides stable support, the seal 520 can distribute pressure more evenly, further improving the sealing effect.

[0327] To better adapt to complex sealing surface shapes or meet specific sealing requirements, the cross-sectional shape of the support 510 can be designed as an irregular shape. These irregular shapes can be customized according to the specific contour of the sealing surface to ensure that the seal 520 can fit tightly and provide an effective seal. In some alternative embodiments, the cross-sectional shape of the support 510 can be a circle, a semi-circle, a triangle, a rectangle, or other polygonal or irregular shapes.

[0328] In some embodiments, as shown in Figures 13-15, at least one of the axial ends of the seal 520 has an annular rib 521, which may surround the air intake passage 211 and abut tightly against the bracket 200 or the main bearing 310. This abutment not only enhances the contact tightness between the seal 520 and surrounding components, but more importantly, it effectively reduces the gap between the bracket 200 and the main bearing 310, preventing gas leakage.

[0329] It can be understood that when the axial end of the seal 520 has an annular rib 521, the annular rib 521 abuts against the bracket 200, or the annular rib 521 abuts against the main bearing 310; when both axial ends of the seal 520 have annular ribs 521, the annular rib 521 on one axial side abuts against the bracket 200, and the annular rib 521 on the other axial side abuts against the main bearing 310. Optionally, the axial direction of the seal 520 (i.e., the axial direction of the second sealing structure 500) is parallel to the axial direction of the horizontal rotary compressor 1000. Of course, in other examples, the axial direction of the seal can also form a non-zero angle with the axial direction of the horizontal rotary compressor.

[0330] It is understood that for the axial end of the seal 520 where the annular rib 521 is provided, there can be one or more annular ribs 521; if the axial end of the seal 520 has multiple annular ribs 521, then the multiple annular ribs 521 can be arranged coaxially in sequence along the radial direction of the seal 520.

[0331] In some embodiments, as shown in Figures 13-15, the annular rib 521 of the seal 520 is offset from the support 510 in the radial direction. Therefore, the axial thickness of the portion of the seal 520 corresponding to the annular rib 521 is greater than the circumferential thickness of the portion corresponding to the support 510. The portion of the seal 520 corresponding to the annular rib 521 experiences a larger compressive force. The radial offset between the annular rib 521 and the support 510 facilitates the reduction of the compressive force between them, thus reducing the compressive force on both the support 510 and the seal 520 under the same compression, and improving the stress distribution on the second sealing structure 500.

[0332] In some embodiments, the support member 510 is a metal or plastic part, and the seal member 520 is a rubber part.

[0333] Metal components possess high strength, excellent wear resistance, and good thermal stability, maintaining stable shape and performance under various operating environments, providing a solid supporting foundation for the seal 520. Furthermore, metal components offer good machinability, allowing for precise dimensional and shape design as needed. On the other hand, plastic components offer advantages such as light weight, low cost, and corrosion resistance, making them particularly suitable for the design of horizontal rotary compressors 1000 where weight and cost are stringent requirements. Moreover, plastic components can be used in injection molding and other processes to achieve complex shape designs, further enhancing the adaptability of the second sealing structure 500.

[0334] The seal 520 is made of rubber, effectively preventing gas leakage. This is because rubber has excellent elasticity, sealing properties, and corrosion resistance. In the horizontal rotary compressor 1000, the seal 520 fits tightly between the bracket 200 and the main bearing 310, thus preventing gas leakage. Simultaneously, the rubber component also has good resistance to compression deformation, maintaining a stable shape and sealing effect under pressure. Furthermore, the rubber component has good aging resistance, maintaining its original performance and shape during long-term use.

[0335] The above solution not only improves the operating efficiency and stability of the horizontal rotary compressor 1000, but also extends its service life.

[0336] Of course, the arrangement of the second sealing structure 500 is not limited to this; in some other embodiments, as shown in Figures 16 and 17, at least one of the bracket 200 and the main bearing 310 is provided with a second mounting groove 312 surrounding the intake channel 311. The second mounting groove 312 communicates with the exhaust chamber 150. The second sealing structure 500 is disposed in the second mounting groove 312. The second sealing structure 500 is an integral piece and includes a first mounting portion 410, a first sealing portion 420 and a second sealing portion 430 respectively formed in annular shape. The first sealing portion 420 and the second sealing portion 430 are both connected to the outer peripheral wall of the first mounting portion 410. The first sealing portion 420 and the second sealing portion 430 are spaced apart along the axial direction of the second sealing structure 500 so that a mating groove 440 is defined between the first mounting portion 410, the first sealing portion 420 and the second sealing portion 430. The first sealing portion 420 abuts against the bracket 200 and the second sealing portion 430 abuts against the main bearing 310.

[0337] As shown in Figure 16, the first mounting portion 410 serves as the base of the second sealing structure 500. The first sealing portion 420 and the second sealing portion 430 extend from the outer peripheral wall of the first mounting portion 410 and are spaced apart along the axial direction. Therefore, a certain gap exists between the first sealing portion 420 and the second sealing portion 430, allowing for a certain amount of deformation space in the axial direction to ensure compressibility. During installation, the second sealing structure 500 can be moderately compressed so that the first sealing portion 420 and the second sealing portion 430 can fit tightly against the sealing surface, adapting to the irregularities of the sealing surface and improving the sealing effect.

[0338] In the above scheme, the second sealing structure 500 is constructed as a plug seal. Since the second mounting groove 312 is connected to the exhaust chamber 150, the high-pressure gas in the exhaust chamber 150 can act on the groove wall of the mating groove 440. The high-pressure gas can exert a force on the first sealing part 420 and the second sealing part 430 away from each other, so that the first sealing part 420 and the second sealing part 430 seal more tightly, thereby improving the sealing performance of the second sealing structure 500.

[0339] It is understandable that when the second sealing structure 500 is constructed as a plug seal, an elastic element (such as a spring) may be provided in the mating groove 440, or an elastic element may not be provided in the mating groove 440.

[0340] In some embodiments, the compression amount of the second sealing structure 500 is 8% to 20%. It is worth noting that the compression amount refers to the percentage of the difference in axial height of the second sealing structure 500 before and after compression (axial height of the second sealing structure 500 before compression / assembly minus axial height of the second sealing structure 500 after compression) to its height before assembly, that is, the proportion of the axial dimension of the second sealing structure 500 reduced by compression in the axial direction after assembly to its axial dimension before assembly.

[0341] Optionally, the compression rate of the second sealing structure 500 can be 8%, 10%, 13%, 15%, 20%, etc. Controlling the compression rate of the second sealing structure 500 between 8% and 20% ensures optimal sealing performance after installation, reduces or eliminates leakage paths, and thus improves the sealing performance of the horizontal rotary compressor 1000. This setting is particularly suitable for scenarios where the horizontal rotary compressor 1000 is a carbon dioxide compressor.

[0342] In some embodiments, as shown in Figures 12 and 17, the pump body structure 300 further includes a crankshaft 340. The crankshaft 340 passes through the main bearing 310, the auxiliary bearing 320, and the compression mechanism 330, and extends into the low-pressure chamber 130 through the mounting hole 212 on the bracket 200 to drive the motor structure located in the low-pressure chamber 130. The crankshaft 340 can convert the rotational motion of the motor structure into the motion of the rollers, thereby achieving gas pressurization. The main bearing 310 and the auxiliary bearing 320 are key components that support the crankshaft 340 and reduce friction and wear during its movement. They are installed in the pump body structure 300 and are tightly fitted with the journal of the crankshaft 340. The main bearing 310 is located at the main stress point of the crankshaft 340 and bears large radial and axial loads, while the auxiliary bearing 320 is used to assist in supporting or adjusting the movement trajectory of the crankshaft 340.

[0343] For example, the compression mechanism 330 includes one or more cylinder assemblies, each cylinder assembly including a cylinder, rollers and vanes, with a compression chamber defined within the cylinder; when there are multiple cylinder assemblies, adjacent cylinder assemblies are provided with partitions; the crankshaft has an eccentric portion, rollers are mounted on the eccentric portion, and a motor structure drives the rollers to rotate eccentrically via the crankshaft to compress the refrigerant within the cylinder; the vanes are placed in the vane slots of the cylinder and abut against the rollers to separate the compression chamber into an intake chamber side and an exhaust chamber side.

[0344] At least one of the mounting hole 212 and the outer peripheral wall of the main bearing 310 has a first mounting groove 2121 that opens toward the exhaust chamber 150. For example, if the first mounting groove 2121 is formed on the mounting hole 212, the first mounting groove 2121 can penetrate the side surface of the bracket 200 facing the exhaust chamber 150. If the first mounting groove 2121 is formed on the outer peripheral wall of the main bearing 310, the first mounting groove 2121 can be formed by a portion of the outer peripheral wall of the main bearing 310 being recessed inward, and the bracket 200 may not completely cover the opening of the first mounting groove 2121. As shown in Figures 17-21, the horizontal rotary compressor 1000 further includes a first sealing structure 400, which is disposed in the first mounting groove 2121 and surrounds the main bearing 310 to separate the exhaust chamber 150 from the low-pressure chamber 130. The first sealing structure 400 includes a first mounting portion 410, a first sealing portion 420, and a second sealing portion 430, which are respectively formed in annular shape. The first sealing portion 420 and the second sealing portion 430 are both connected to the outer peripheral wall of the first mounting portion 410 and are arranged radially spaced to define a mating groove 440 between the first mounting portion 410, the first sealing portion 420, and the second sealing portion 430. The first sealing portion 420 abuts against the bracket 200, and the second sealing portion 430 abuts against the main bearing 310.

[0345] As shown in Figure 17, the mounting hole 212 on the bracket 200 provides a passage for the crankshaft 340 to extend into the low-pressure chamber 130. The mounting hole 212 is configured to adapt to the size, shape, and movement trajectory of the crankshaft 340 to ensure that the crankshaft 340 can pass smoothly and be positioned accurately.

[0346] The low-pressure chamber 130 is a key area inside the horizontal rotary compressor 1000, typically used to collect, store, and transfer low-pressure refrigerant gas. During operation of the horizontal rotary compressor 1000, low-pressure refrigerant gas enters the low-pressure chamber 130 through the inlet, then undergoes compression by the compression mechanism 330 to increase its pressure and temperature, and finally is discharged through the outlet.

[0347] Good sealing is required between the exhaust chamber 150 and the low-pressure chamber 130. At least one of the walls of the mounting hole 212 and the outer peripheral wall of the main bearing 310 is formed with a first mounting groove 2121 that opens toward the exhaust chamber 150. A first sealing structure 400 is disposed in the first mounting groove 2121, which can communicate with the exhaust chamber 150. In this way, the first sealing structure 400 is provided around the mounting hole 212, which enhances the internal sealing performance of the horizontal rotary compressor 1000.

[0348] As shown in Figures 18-21, the first sealing structure 400 includes a first mounting portion 410, a first sealing portion 420, and a second sealing portion 430, each formed in an annular shape. By combining the first mounting portion 410, the first sealing portion 420, and the second sealing portion 430 and placing them within the first mounting groove 2121, effective isolation between the exhaust chamber 150 and the low-pressure chamber 130 is achieved. The first mounting portion 410 serves as the base of the first sealing structure 400, providing a connection foundation for the first sealing portion 420 and the second sealing portion 430. The first sealing portion 420 fits tightly against the bracket 200, effectively preventing gas from leaking into the low-pressure chamber 130 through the gap between the assembly hole 212 and the main bearing 310; while the second sealing portion 430 is in close contact with the main bearing 310, improving the sealing effect and further preventing the backflow of gas into the low-pressure chamber 130.

[0349] Furthermore, since the first mounting groove 2121 is connected to the exhaust chamber 150, the high-pressure gas in the exhaust chamber 150 can act on the groove wall of the mating groove 440. The high-pressure gas can exert a force on the first sealing part 420 and the second sealing part 430 away from each other, so that the first sealing part 420 and the second sealing part 430 seal more tightly, thereby improving the sealing performance of the first sealing structure 400.

[0350] In some embodiments, as shown in Figures 18-21, the horizontal rotary compressor 1000 further includes an elastic element 450, which is disposed between the first sealing portion 420 and the second sealing portion 430 and is used to apply an elastic force that moves the first sealing portion 420 and the second sealing portion 430 away from each other. The elastic element 450 is disposed in the mating groove 440.

[0351] When the horizontal rotary compressor 1000 is running, the first sealing part 420 and the second sealing part 430 may expand or contract to different degrees due to changes in temperature and pressure. At this time, the elastic element 450 applies pressure to the two sealing parts through its elastic force, ensuring that they can always fit tightly against their respective contact surfaces. This not only improves the adaptability and sealing reliability of the first sealing structure 400, but also reduces energy loss and failure risk caused by poor sealing.

[0352] In some alternative embodiments, the elastic element 450 may be a spring extending helically along the circumference of the first sealing structure 400. By connecting the ends of the spring to form a closed loop structure, the elastic force of the spring is used to achieve a tight fit between the first sealing portion 420 and the second sealing portion 430. In other embodiments, the elastic element 450 may be configured to reciprocate and extend along the circumference of the first sealing structure 400, such that the elastic element 450 extends in an S-shape along the circumference of the first sealing structure 400. In some solutions, the elastic element 450 may also be an annular rubber ring. Utilizing the good elasticity of the rubber ring, a softer contact surface with better sealing effect is achieved.

[0353] As shown in Figures 9, 11, and 12-16, in some embodiments, the horizontal rotary compressor 1000 further includes a filter structure 700. The filter structure 700 is disposed between the air inlet (formed on the housing 100) of the horizontal rotary compressor 1000 and the inlet 333a of the compression chamber 333.

[0354] During the operation of the horizontal rotary compressor 1000, minute impurities in the surrounding environment, such as dust and other fine particles, may enter the interior of the pump body structure 300 through unsealed gaps. Impurities in the piping system connected to the horizontal rotary compressor may also enter the compressor along with the refrigerant. Once these impurities enter, they may not only contaminate the compressed gas and reduce its quality, but may also adhere to critical components such as the compression mechanism 330 and bearings, leading to accelerated wear and, in severe cases, even malfunction. For example, the precision of the pump body structure of a rolling rotor compressor is at the micrometer level; impurities larger than micrometers may cause the rotor to stall.

[0355] By setting up a filter structure 700, the risk of impurities entering the compression mechanism 330 is reduced, ensuring the cleanliness of the internal environment of the compression mechanism 330 and the purity of the working medium. This reduces the maintenance cost and failure rate of the horizontal rotary compressor 1000, making it suitable for scenarios with high sensitivity to impurities. Furthermore, for high-precision compression mechanisms, it improves the problem of impurities entering the compression structure and causing blockage, thereby enhancing the reliability and stability of the horizontal rotary compressor.

[0356] Optionally, the filter structure 700 is disposed within the housing 100 to reduce the space occupied by the horizontal rotary compressor 1000.

[0357] The primary function of the filter structure 700 is to act as a barrier, intercepting impurities in the gas before it enters the compression chamber 333. This pre-filtration mechanism ensures that only purified refrigerant can enter the compression chamber 333 for further compression, thus preventing contamination of the compressed gas quality by impurities. It also reduces potential damage such as wear and stalling of the internal mechanical components of the horizontal rotary compressor 1000, extending its service life. Therefore, the number and specific location of the filter structures 700 can be flexibly adjusted according to requirements. Taking one filter structure 700 as an example: the filter structure 700 can be directly installed at the air inlet of the horizontal rotary compressor 1000, or at the inlet 333a of the compression chamber 333, or downstream of the air inlet of the horizontal rotary compressor 1000 and upstream of the inlet 333a of the compression chamber 333 (e.g., in the low-pressure chamber, or at the air inlet channel). It can be understood that multiple filter structures 700 are also possible.

[0358] In related technologies, the filter structure is located on the liquid receiver, but for compressors without a liquid receiver, it is difficult to improve the stall problem. Obviously, in the above solution, the setting of the filter structure 700 makes the horizontal rotary compressor 1000 suitable for scenarios without a liquid receiver.

[0359] In some embodiments, as shown in Figures 9, 11, 12, 15, and 16, the compression mechanism 330 is formed with a mating cavity 335, which communicates with at least one compression cavity 333. The filter structure 700 passes through at least the intake passage 311 and the mating cavity 335 (for example, the filter structure 700 passes through only the intake passage 311 and the mating cavity 335, or for example, the filter structure 700 passes through the connecting passage 211, the intake passage 311, and the mating cavity 335). The filter screen 720 of the filter structure 700 is radially opposite to the inlet 333a of at least one compression cavity 333 of the horizontal rotary compressor 1000. Therefore, the filter screen 720 can cover the inlet 333a of the compression chamber 333 to achieve filtration, and it is beneficial to reduce the obstruction of the airflow at the inlet 333a by the filter structure 700. It is also not easy to excessively reduce the airflow area due to the filter structure 700, and it will not excessively increase the airflow resistance, so as to ensure the smooth flow of airflow. In particular, when the filter structure 700 also includes a mounting bracket 710, which includes a first skeleton part 711, a hollow part 712 and a second skeleton part 713, the second skeleton part 713 is located in the mating cavity 335 and is staggered from the inlet 333a, so that the second skeleton part 713 will not block the airflow at the inlet 333a, nor will it block the airflow in the air intake channel 311 and the mating cavity 335.

[0360] For example, as shown in Figures 9, 11, 12, 15, and 16, the compression mechanism 330 includes a first cylinder 331, a second cylinder 332, and a partition plate 334. The mating cavity 335 passes through the first cylinder 331 and the partition plate 334 and extends into the second cylinder 332, so that the mating cavity 335 communicates with the compression cavity 333 of the first cylinder 331 and also communicates with the compression cavity 333 of the second cylinder 332. The inlet 333a of the first cylinder 331 and the inlet 333a of the second cylinder 332 are both radially opposite to the filter screen 720 of the filter structure 700, so that the refrigerant filtered by the filter structure 700 can be distributed to the first cylinder 331 and the second cylinder 332.

[0361] The second sealing structure 500 is fitted outside the filter structure 700, so the filter structure 700 can limit the radial displacement of the second sealing structure 500 to a certain extent, which is beneficial to improving the installation reliability and sealing performance of the second sealing structure 500. For example, the second sealing structure 500 is fitted outside the mounting bracket 710, and the mounting bracket 710 can better limit the second sealing structure 500 relative to the filter screen 720, so as to further improve the installation stability of the second sealing structure 500.

[0362] For example, the mounting bracket 710 includes a first skeleton portion 711, a hollow portion 712, and a second skeleton portion 713. A filter screen 720 is disposed in the hollow portion 712, and the two axial ends of the filter screen 720 are respectively connected to the first skeleton portion 711 and the second skeleton portion 713. A second sealing structure 500 is sleeved outside the first skeleton portion 711, or the second sealing structure 500 is sleeved outside the hollow portion 712. For example, when the first skeleton portion 711 is limited and fitted into the third mounting groove 2111 on the bracket 200, if the first skeleton portion 711 does not extend into the main bearing 310, the second sealing structure 500 is sleeved outside the hollow portion 712; if the first skeleton portion 711 extends into the main bearing 310, the second sealing structure 500 is sleeved outside the first skeleton portion 711.

[0363] In some embodiments, as shown in Figures 13, 15, and 16, a third mounting groove 2111 is formed on the wall of the connecting channel 211. The third mounting groove 2111 passes through one end of the bracket 200 facing the main bearing 310. The filter structure 700 is limited and fitted into the third mounting groove 2111 to restrict the axial movement of the filter structure 700, thereby improving installation reliability. Moreover, the filter structure 700 can be inserted into the third mounting groove 2111 along the direction of the main bearing 310 toward the bracket 200, thereby reducing the length of the filter structure 700 when fitted into the bracket 200, which is beneficial to improving the installation convenience of the filter structure 700.

[0364] For example, the mounting bracket 710 of the filter structure 700 includes a first skeleton part 711, a hollow part 712 and a second skeleton part 713. The first skeleton part 711 is limited and fitted in the third mounting groove 2111, and the filter screen 720 and the hollow part 712 pass through the main bearing 310.

[0365] Of course, the installation configuration of the filter structure 700 is not limited to this. In some other embodiments, as shown in FIG9, the filter structure 700 has a first outward protrusion 700a, which is sandwiched between the bracket 200 and the main bearing 310. This can also restrict the axial movement of the filter structure 700 and achieve reliable installation of the filter structure 700. Exemplarily, the first outward protrusion 700a can be formed by a portion of the outer peripheral wall of the mounting bracket 710 protruding radially outward along the filter screen 720. For example, the first outward protrusion 700a can be formed as a rib extending in an annular shape along the circumference of the filter screen 720.

[0366] It is understood that the first protrusion 700a can be located at the end of the mounting bracket 710 in the axial direction of the filter screen 720, or the first protrusion 700a and the two ends of the mounting bracket 710 in the axial direction of the filter screen 720 can be spaced apart respectively; at least one of the bracket 200 and the main bearing 310 is fixedly connected to the first protrusion 700a, or neither the bracket 200 nor the main bearing 310 is connected to the first protrusion 700a. In this case, the first protrusion 700a can be clamped and fixed by the connecting force of the fixed connection between the bracket 200 and the main bearing 310, so as to realize the installation of the filter structure 700.

[0367] For example, the first protrusion 700a is located at the end of the mounting bracket 710 in the axial direction of the filter screen 720. Since the filter screen 720 is opposite to the inlet 333a of the compression chamber 333, the first protrusion 700a is located at the end of the mounting bracket 710 away from the downstream end of the filter screen 720. At this time, the filter structure 700 can pass through the air intake channel 311 and the mating cavity 335, but not through the connecting channel 211. For example, the mounting bracket 710 includes a first skeleton part 711, a hollow part 712 and a second skeleton part 713 connected sequentially along the axial direction of the filter screen 720. The first protrusion 700a is formed at the end of the first skeleton part 711 away from the second skeleton part 713. The filter screen 720 and the hollow part 712 pass through the main bearing 310. Of course, the first protrusion 700a can also be spaced between the two ends of the mounting bracket 710 in the axial direction of the filter screen 720. In this case, the filter structure 700 can pass through the connecting channel 211, the air inlet channel 311 and the mating cavity 335.

[0368] In some embodiments, as shown in Figure 11, a heat insulation cover 360 is provided on the side of the bracket 200 facing away from the main bearing 310. This heat insulation cover 360 facilitates the separation of at least a portion of the uncompressed low-temperature refrigerant from the high-temperature bracket 200, which helps reduce the heat transfer from the bracket 200 towards the low-temperature refrigerant, thereby reducing suction heat loss and improving the energy efficiency of the horizontal rotary compressor 1000. The filter structure 700 is fixedly connected to the heat insulation cover 360, and the heat insulation cover 360 enables the installation of the filter structure 700. And / or, the filter structure 700 has a second outward protrusion 700b sandwiched between the heat insulation cover 360 and the bracket 200. For example, the second outward protrusion 700b can be formed by a portion of the outer peripheral wall of the mounting bracket 710 protruding radially outward along the filter screen 720, forming a ring-shaped rib extending circumferentially along the filter screen 720. Thus, reliable installation of the filter structure 700 can also be achieved, and the installation method is flexible. For example, the thermal conductivity of the heat shield 360 may be less than that of the bracket 200.

[0369] It is understood that the second protrusion 700b can be located at the end of the mounting bracket 710 in the axial direction of the filter screen 720, or the second protrusion 700b and the two ends of the mounting bracket 710 in the axial direction of the filter screen 720 can be spaced apart respectively; at least one of the heat insulation cover 360 and the bracket 200 is fixedly connected to the second protrusion 700b, or neither the heat insulation cover 360 nor the bracket 200 is connected to the second protrusion 700b. In this case, the second protrusion 700b can be clamped and fixed by the connection force of the fixed connection between the heat insulation cover 360 and the bracket 200, so as to realize the installation of the filter structure 700.

[0370] For example, the second protrusion 700b is located at the end of the mounting bracket 710 along the axial direction of the filter screen 720. Since the filter screen 720 is opposite to the inlet 333a of the compression chamber 333, the second protrusion 700b is located at the end of the mounting bracket 710 away from the downstream end of the filter screen 720. In this case, the filter structure 700 can pass through the air intake channel 311 and the mating cavity 335, but not through the connecting channel 211. For example, the mounting bracket 710 includes a first skeleton portion 711, a hollow portion 712 and a second skeleton portion 713 connected sequentially along the axial direction of the filter screen 720, and the second protrusion 700b is formed at the end of the first skeleton portion 711 away from the second skeleton portion 713. Of course, the first protrusion 700a can also be spaced between the two ends of the mounting bracket 710 along the axial direction of the filter screen 720. In this case, the filter structure 700 can pass through the air intake channel 311, the connecting channel 211 and the mating cavity 335.

[0371] Furthermore, when the mounting bracket 710 is fixedly connected to the heat insulation cover 360, at least a portion of the mounting bracket 710 can be integrally formed into the heat insulation cover 360, or the mounting bracket 710 and the heat insulation cover 360 are separate parts and connected by assembly means.

[0372] For the various installation schemes of the filter structure 700, whether through the third mounting groove 2111, the first external protrusion 700a, the heat insulation cover 360, or the second external protrusion 700b, in the direction from the secondary bearing 320 to the main bearing 310, it is easy to ensure that the filter structure 700 does not exceed the end face of the bracket 200 away from the secondary bearing 320, or that the size of the filter structure 700 exceeding the end face of the bracket 200 away from the secondary bearing 320 can be controlled. This helps to reduce the space occupied by the filter structure 700 on the side of the bracket 200 away from the secondary bearing 320 (e.g., the low-pressure chamber 130 mentioned later). If the horizontal rotary compressor 1000 is an electric compressor, it is easy to provide sufficient space for the motor structure in the low-pressure chamber 130, while the motor structure is less likely to interfere with the filter structure 700.

[0373] In some embodiments, as shown in Figures 9-16, the filter structure 700 includes a mounting bracket 710 and a filter screen 720. The filter screen 720 is formed into a cylindrical structure, and the mounting bracket 710 closes one axial end of the filter screen 720. It can be seen that the filter structure 700 can be installed via the mounting bracket 710, while the two axial ends of the filter screen 720 are open to form openings. The opening at the upstream end of the filter screen 720 allows airflow to enter the filter screen 720, and the mounting bracket 710 closes the opening at the downstream end of the filter screen 720. The airflow entering the filter screen 720 can pass through the filter screen 720 approximately radially to be filtered by the filter screen 720. Therefore, the airflow at the opening at the upstream end of the filter screen 720 can flow approximately axially along the filter screen 720, and the refrigerant exiting the filter screen 720 will not flow directly towards the filter screen 720, which helps to reduce the impact of the airflow on the filter screen 720 during its flow. Furthermore, since the mounting bracket 710 encloses the downstream end of the filter screen 720, part of the impact of the airflow on the filter structure 700 is applied to the mounting bracket 710. This allows the mounting bracket 710 to withstand this impact, which helps to further reduce the impact on the filter screen 720 and improve reliability. At the same time, it helps to reduce the installation requirements of the filter screen 720. It eliminates the need to ensure that all refrigerant flowing to the compression mechanism 330 passes through the filter screen 720 before reaching the compression mechanism 330 by ensuring that the filter screen 720 is tightly fitted with other components, thus simplifying the installation of the filter structure 700.

[0374] In this embodiment, the connection method between the mounting bracket 710 and the filter screen 720 is not specifically limited. For example, the mounting bracket 710 and the filter screen 720 can be connected by injection molding or welding. The axial direction of the filter screen 720 can be parallel to the axial direction of the horizontal rotary compressor 1000 (i.e., the axial direction of the pump body structure 300, the axial direction of the crankshaft 340, and the extension direction of the central axis L in Figure 17) (as shown in Figures 6, 9, 11, 12, 15, and 16), or the axial direction of the filter screen 720 can also form a non-zero angle with the axial direction of the horizontal rotary compressor 1000.

[0375] In some embodiments, as shown in Figures 6, 9, 11, 12, 15, and 16, the mounting frame 710 includes a first skeleton portion 711, a perforated portion 712, and a second skeleton portion 713 arranged sequentially in the airflow direction. The first skeleton portion 711 is formed into a ring structure, and at least a majority of the filter screen 720 is disposed in the perforated portion 712. The two axial ends of the filter screen 720 are respectively connected to the first skeleton portion 711 and the second skeleton portion 713, and the second skeleton portion 713 closes one axial end of the filter screen 720. Thus, the internal space of the first skeleton portion 711 can correspond to the inlet of the filter structure 700, which facilitates the filter structure 700 to filter all airflow flowing towards the inlet 333a of the compression mechanism 330. Moreover, the mounting frame 710 can support the filter screen 720 as a whole to maintain the shape of the filter screen 720, which helps to improve the reliability of the filter structure 700.

[0376] In this embodiment, the structure of the perforated portion 712 is not specifically limited. It is sufficient that the perforated portion 712 has a channel connecting its interior and exterior, so that the airflow entering the filter screen 720 can pass through the filter screen 720 and smoothly exit the filter structure 700. For example, the perforated portion 712 may include multiple connecting rods spaced circumferentially along the first skeleton portion 711. The two ends of each connecting rod are respectively connected to the first skeleton portion 711 and the second skeleton portion 713. The space between two adjacent connecting rods can form a channel connecting the interior and exterior of the perforated portion 712. The airflow entering the filter screen 720 can pass through this channel and exit the filter screen 720. The perforated portion 712 has a simple structure, facilitates reliable support for the filter screen 720, and has relatively little obstruction to airflow.

[0377] In some embodiments, as shown in FIG17, the housing 100 includes a second housing 120 and a first housing 110. A bracket 200 is sandwiched between the second housing 120 and the first housing 110. A high-pressure chamber 140 is defined between the bracket 200 and the second housing 120, and a low-pressure chamber 130 is defined between the bracket 200 and the first housing 110. This facilitates the forming and sealing of the high-pressure chamber 140 and the low-pressure chamber 130, and also facilitates assembly. A back pressure chamber 160 is defined between the pump body structure 300 and the inner wall of the high-pressure chamber 140 (e.g., the inner surface of the second housing 120), which communicates with the outlet of the horizontal rotary compressor 1000. A second exhaust passage 810 communicating with the exhaust chamber 150 and the back pressure chamber 160 is formed on the second housing 120. This facilitates the optimization of the gas flow path in the back pressure chamber 160, and also reduces the impact of exhaust pulses on the internal structure of the horizontal rotary compressor 1000 by increasing the exhaust buffer space. This design makes the gas discharge process more stable, reducing vibration and noise caused by sudden airflow changes, which helps improve the overall operational stability of the horizontal rotary compressor 1000 and the user experience. As can be seen, in the above scheme, the refrigerant compressed in the compression chamber 333 can flow sequentially through the exhaust chamber 150, the second exhaust channel 810, and the back pressure chamber 160, and then be discharged through the outlet. Due to the airflow resistance, the pressure in the back pressure chamber 160 is lower than the pressure in the exhaust chamber 150, thus achieving the back pressure design of the horizontal rotary compressor 1000.

[0378] Optionally, the bracket 200 is integrally formed into the first housing 110, for example, the bracket 200 and the first housing 110 are a single piece; or the bracket 200 and the first housing 110 are separate pieces.

[0379] In some embodiments, as shown in Figures 17 and 12, the compression mechanism 330 includes a first cylinder 331, a second cylinder 332, and a partition plate 334. The partition plate 334 is sandwiched between the first cylinder 331 and the second cylinder 332. The first cylinder 331 and the second cylinder 332 each have a compression chamber 333. The compression chamber 333 of the first cylinder 331 and the compression chamber 333 of the second cylinder 332 are both connected to the intake passage 311. The compression chamber 333 of the first cylinder 331 is connected to the exhaust chamber 150. The compression chamber 333 of the second cylinder 332 is connected to the exhaust chamber 150 through the third exhaust passage 820 on the pump body structure 300. As can be seen, the first cylinder 331 is located between the main bearing 310 and the partition plate 334. The refrigerant that has been compressed in the first cylinder 331 flows through the exhaust chamber 150 to the second exhaust channel 810. The refrigerant that has been compressed in the second cylinder 332 flows through the third exhaust channel 820 and the exhaust chamber 150 in sequence and then flows to the second exhaust channel 810. Thus, the refrigerant flowing out of the first cylinder 331 and the second cylinder 332 can converge in the exhaust chamber 150.

[0380] Since the compression chambers 333 in both the first cylinder 331 and the second cylinder 332 are connected to the intake passage 311, this allows the first cylinder 331 and the second cylinder 332 to simultaneously / alternately draw in the gas to be compressed. This parallel compression operation increases the gas throughput of the horizontal rotary compressor 1000, shortens the compression cycle, and thus improves the working efficiency of the horizontal rotary compressor 1000. The partition plate 334 not only serves as a physical isolation between the two cylinders but also enhances the structural stability of the horizontal rotary compressor 1000. It reduces mutual influence and vibration transmission between cylinders, allowing each cylinder to operate in a more stable environment. Therefore, this design not only extends the service life of the horizontal rotary compressor 1000 but also reduces noise caused by vibration.

[0381] The compression chamber 333 of the second cylinder 332 is connected to the exhaust chamber 150 through the third exhaust passage 820 on the pump body structure 300. This design optimizes the exhaust process, ensuring that the gas can be smoothly discharged from the second cylinder 332 and enter the exhaust chamber 150, thereby making the exhaust process stable and reliable.

[0382] In some embodiments, as shown in FIG17, the pump body structure 300 further includes a muffler 350 disposed on the auxiliary bearing 320. The muffler 350 and the auxiliary bearing 320 form a muffler cavity 351 as part of a third exhaust passage 820 (another part of the third exhaust passage 820 may pass through the auxiliary bearing 320, the compression mechanism 330 and the main bearing 310). The second housing 120 and the auxiliary bearing 320 define an oil return cavity 172 communicating with the low-pressure cavity 130. The oil return cavity 172 may be located at the end of the auxiliary bearing 320 away from the main bearing 310. The horizontal rotary compressor 1000 further includes a third sealing structure 600. The third sealing structure 600 is an integral piece and is sealed between the muffler 350 and the auxiliary bearing 320, and between the second housing 120 and the auxiliary bearing 320, so as to separate the muffler cavity 351 from the oil return cavity 172 and separate the back pressure cavity 160 from the oil return cavity 172.

[0383] By placing the silencer 350 on the auxiliary bearing 320 within the pump body structure 300, this layout not only saves space but also achieves the dual functions of noise reduction and bearing support. This reduces the number of sealing structures and simplifies the structure and assembly of the horizontal rotary compressor 1000. The silencing cavity 351 between the silencer 350 and the auxiliary bearing 320, as part of the third exhaust passage 820, reduces noise generated during exhaust, enabling the horizontal rotary compressor 1000 to maintain a lower noise level during operation and providing a quieter environment for the user.

[0384] To ensure the sealing and independence of the internal chamber of the horizontal rotary compressor 1000, as shown in Figures 2 and 17, this application also includes a third sealing structure 600, which is an integral piece and has strong reliability.

[0385] As shown in Figure 2, the third sealing structure 600 extends axially along the horizontal rotary compressor 1000 in cross-section. One axial end of the third sealing structure 600 seals between the silencer 350 and the auxiliary bearing 320, while the other end seals between the second housing 120 and the auxiliary bearing 320. Referring to Figure 17, the integrated third sealing structure 600 separates the silencer chamber 351 from the oil return chamber 172, and also separates the back pressure chamber 160 from the oil return chamber 172. Therefore, the third sealing structure 600 improves the sealing efficiency inside the horizontal rotary compressor 1000, effectively preventing the mixing of gas and oil between different chambers, and also avoiding internal pressure leakage, thus ensuring stable operation and high efficiency of the horizontal rotary compressor 1000. The return oil chamber 172, the silencer chamber 351, and the back pressure chamber 160 can all be located within the high pressure chamber 140. The back pressure chamber 160 can be located on the side of the pump body structure 300 facing the return oil chamber 172, and the silencer chamber 351 can be located in the part of the pump body structure 300 adjacent to the back pressure chamber 160. Thus, the positions of the return oil chamber 172, the silencer chamber 351, and the back pressure chamber 160 are relatively concentrated, which makes it convenient for the integrated third sealing structure 600 to separate the three, which helps to reduce the number of seals and improve assembly efficiency.

[0386] As shown in Figures 12 and 17, the oil return chamber 172 defined between the housing 100 and the auxiliary bearing 320 is a component of the lubrication system of the horizontal rotary compressor 1000. The oil return chamber 172 receives used oil and allows it to flow back to the low-pressure chamber 130. The lubricating oil in the low-pressure chamber 130 can flow with the refrigerant into the compression mechanism 330, and then flow back to the oil return chamber 130 through the gaps in the compression mechanism 330. This creates an internal circulation of lubricating oil, which improves lubrication. The layout of the oil return chamber 172 not only ensures the full recovery and utilization of lubricating oil but also reduces oil waste. Furthermore, because the oil return chamber 172 is isolated from components such as the back pressure chamber 160 and the silencer chamber 351, the influence of lubricating oil on the gas compression process is avoided, ensuring the purity and quality of the compressed gas.

[0387] An air conditioning system 2000 according to a fifth aspect embodiment of this application includes a horizontal rotary compressor 1000 according to the first aspect embodiment of this application, or includes a horizontal rotary compressor 1000 according to the second aspect embodiment of this application, or includes a horizontal rotary compressor 1000 according to the third aspect embodiment of this application, or includes a horizontal rotary compressor 1000 according to the fourth aspect embodiment of this application. Therefore, by employing the horizontal rotary compressor 1000 of the first aspect embodiment, the assembly of the air conditioning system 2000 is facilitated; by employing the horizontal rotary compressor 1000 of the second aspect embodiment or the fourth aspect embodiment, a highly efficient and reliable horizontal rotary compressor 1000 is integrated, improving the working efficiency of the air conditioning system 2000; by employing the horizontal rotary compressor 1000 of the third aspect embodiment, the energy efficiency of the air conditioning system 2000 is improved. It is understood that the type of air conditioning system 2000 in this application embodiment is not limited. It can be a vehicle air conditioning system, an integrated air conditioning unit, or a split air conditioning unit. An integrated air conditioning unit can include a window air conditioner or a portable air conditioner, and a split air conditioning unit can include a wall-mounted air conditioner or a cabinet air conditioner.

[0388] The vehicle 3000 according to the sixth aspect of this application includes the horizontal rotary compressor 1000 according to the first aspect of this application, or includes the horizontal rotary compressor 1000 according to the second aspect of this application, or includes the horizontal rotary compressor 1000 according to the third aspect of this application, or includes the horizontal rotary compressor 1000 according to the fourth aspect of this application, or includes the air conditioning system 2000 according to the fifth aspect of this application. Therefore, by adopting the horizontal rotary compressor 1000 of the first aspect embodiment described above, the assembly of the vehicle 3000 is facilitated; by adopting the horizontal rotary compressor 1000 of the second aspect embodiment described above or the horizontal rotary compressor 1000 of the fourth aspect embodiment described above, the interior of the vehicle 3000 can quickly reach and maintain a comfortable temperature environment, providing passengers with a comfortable riding experience. Simultaneously, the high efficiency of the air conditioning system 2000 helps reduce the energy consumption of the vehicle 3000 and improve the energy utilization rate of the vehicle 3000; by adopting the horizontal rotary compressor 1000 of the third aspect embodiment described above, the comfort of the vehicle 3000 is improved, and the energy consumption of the vehicle 3000 is also reduced. It is worth noting that the specific type of vehicle 3000 referred to in this application is not limited. For example, the vehicle 3000 can be a fuel-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, range-extended electric vehicles, solar electric vehicles, gas fuel vehicles (e.g., hydrogen engine vehicles), or biofuel vehicles (e.g., vehicles powered by ethanol, biodiesel, etc.).

[0389] Other configurations and operations of the vehicle 3000 according to the embodiments of this application are known to those skilled in the art and will not be described in detail here.

[0390] Furthermore, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this application will not describe the various possible combinations separately. In addition, various different embodiments of this application can also be arbitrarily combined, as long as they do not violate the spirit of this application, they should also be regarded as the content disclosed in this application.

[0391] In the description of this application, it should be understood that the terms "center," "lateral," "length," "thickness," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more. In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0392] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0393] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A horizontal rotary compressor, wherein, include: The second housing has an inner cavity and an air outlet; A pump body structure is provided in the inner cavity and defines a back pressure chamber that communicates with the air outlet between the pump body structure and the wall of the inner cavity. The pump body structure includes a compression mechanism, a secondary bearing, and a silencer. The secondary bearing is located between the compression mechanism and the silencer and defines a silencer chamber between the secondary bearing and the silencer. The silencer chamber communicates with the outlet of the compression mechanism and the back pressure chamber. A return oil chamber is defined between the second housing and the secondary bearing. The return oil chamber is located at the end of the secondary bearing opposite to the compression mechanism. The third sealing structure is an integral piece and is sealed between the secondary bearing and the muffler, and between the secondary bearing and the second housing, so as to separate the muffler cavity from the oil return cavity and the back pressure cavity from the oil return cavity.

2. The horizontal rotary compressor according to claim 1, wherein, The second housing has a mounting ring, and the secondary bearing has a first hub portion that passes through the muffler. The mounting ring is sleeved on the outside of the first hub portion and spaced apart from the muffler. The third sealing structure includes a fifth sealing portion and a sixth sealing portion that are respectively formed in annular shape and connected to each other. The fifth sealing portion seals between the muffler and the first hub portion, and the sixth sealing portion seals between the mounting ring and the first hub portion.

3. The horizontal rotary compressor according to claim 2, wherein, A fourth mounting groove is formed between the muffler and the first wheel hub, and the fifth sealing portion is disposed in the fourth mounting groove; and / or, The fifth sealing part has a protruding part on its inner and / or outer peripheral walls.

4. The horizontal rotary compressor according to claim 3, wherein, A limiting groove is formed on the wall of the fourth mounting groove, and the protrusion engages with the limiting groove.

5. The horizontal rotary compressor according to claim 3 or 4, wherein, The protrusion is provided on the outer peripheral wall of the fifth sealing part, and the end face of the fifth sealing part away from the sixth sealing part extends obliquely from the inside out toward the direction close to the sixth sealing part.

6. The horizontal rotary compressor according to any one of claims 2-5, wherein, A fifth mounting groove is formed between the mounting ring and the first hub portion. The sixth sealing portion is disposed in the fifth mounting groove and includes a connecting section, a first sealing section, and a second sealing section. The first sealing section abuts against the first hub portion and is connected to the fifth sealing portion. The second sealing section abuts against the mounting ring. The connecting section is connected between the first sealing section and the second sealing section, so that the connecting section, the first sealing section, and the second sealing section define a first groove with its opening facing the muffler.

7. The horizontal rotary compressor according to claim 6, wherein, The side of the connecting section opposite to the first sealing section and the second sealing section abuts against the groove wall of the fifth mounting groove.

8. The horizontal rotary compressor according to any one of claims 1-7, wherein, Also includes: A filter structure is provided upstream of the inlet of the compression mechanism and includes a mounting frame and a filter screen. The filter screen is provided on the mounting frame and is formed into a cylindrical structure. The two axial ends of the filter screen are an upstream end and a downstream end, respectively. The mounting frame closes the downstream end of the filter screen.

9. The horizontal rotary compressor according to claim 8, wherein, The mounting bracket includes a first skeleton part, a hollow part and a second skeleton part connected sequentially along the axial direction of the filter screen. The first skeleton part is formed into a ring structure. The filter screen is disposed in the hollow part. The two axial ends of the filter screen are respectively connected to the first skeleton part and the second skeleton part. The second skeleton part closes one axial end of the filter screen.

10. The horizontal rotary compressor according to claim 8 or 9, wherein, The pump body structure also includes a main bearing, which is located on the side of the compression mechanism opposite to the secondary bearing. The horizontal rotary compressor also includes: A bracket is provided on one side of the second housing along the axial direction of the pump body structure and corresponds to the main bearing. An air intake channel is formed on the bracket and the main bearing. A fitting cavity is formed on the compression mechanism. The fitting cavity connects the air intake channel and the inlet of the compression mechanism. A filter structure passes through the air intake channel and the fitting cavity. The filter screen is radially opposite to the inlet of the compression mechanism along the secondary bearing.

11. The horizontal rotary compressor according to claim 10, wherein, The bracket has a third mounting groove formed on its wall surface corresponding to the air intake channel. The third mounting groove extends through one end of the bracket facing the main bearing, and the mounting bracket is positioned and fitted into the third mounting groove; or, The mounting bracket has a first outward protrusion, which is sandwiched between the bracket and the main bearing; or... A heat shield is provided on the side of the bracket away from the main bearing, and the mounting bracket is fixedly connected to the heat shield, and / or the mounting bracket has a second outward protrusion sandwiched between the heat shield and the bracket.

12. The horizontal rotary compressor according to claim 11, wherein, A heat shield is provided on the side of the bracket away from the main bearing, and a positioning hole is formed on the heat shield. The end of the mounting bracket extends out of the air intake channel and is positioned and fitted into the positioning hole.

13. The horizontal rotary compressor according to any one of claims 1-12, wherein, The pump body structure also includes a main bearing, which is located on the side of the compression mechanism opposite to the auxiliary bearing. The horizontal rotary compressor also includes a bracket, which is located at one end of the second housing in the axial direction of the pump body structure and defines a first exhaust chamber between the bracket and the main bearing, connecting the silencing chamber and the back pressure chamber. An air intake channel is formed on the bracket and the main bearing, the air intake channel communicating with the inlet of the compression mechanism. The horizontal rotary compressor further includes a second sealing structure, which is disposed between the bracket and the main bearing and surrounds the air intake channel to separate the first exhaust chamber from the air intake channel; and / or, The horizontal rotary compressor further includes a third sealing structure, which is disposed between the main bearing and the bracket and surrounds the crankshaft of the horizontal rotary compressor to separate the first exhaust chamber from the side of the bracket away from the main bearing.

14. The horizontal rotary compressor according to claim 13, wherein, The horizontal rotary compressor includes a second sealing structure and a filter structure, the filter structure being located at the air intake passage, and the second sealing structure being sleeved outside the filter structure.

15. The horizontal rotary compressor according to claim 13 or 14, wherein, A second mounting groove is formed between the bracket and the main bearing, surrounding the air intake passage. The second sealing structure of the horizontal rotary compressor is disposed in the second mounting groove. The second mounting groove communicates with the first exhaust chamber. The second sealing structure is a single piece and includes a second mounting portion, a third sealing portion, and a fourth sealing portion, each formed as an annular shape. The third sealing portion and the fourth sealing portion are both connected to the outer peripheral wall of the second mounting portion and are spaced apart along the axial direction of the second mounting portion, so that a second groove is defined between the second mounting portion, the third sealing portion, and the fourth sealing portion. The third sealing portion abuts against the bracket, and the fourth sealing portion abuts against the main bearing; or... The second sealing structure includes a support member and a sealing member. The support member is an annular structure, and the sealing member is completely wrapped around the support member. The elastic modulus of the support member is greater than that of the sealing member.

16. The horizontal rotary compressor according to any one of claims 13-15, wherein, A first mounting groove is formed between the main bearing and the bracket, and the first sealing structure of the horizontal rotary compressor is disposed in the first mounting groove. The first sealing structure is an integral part and includes a first mounting part, a first sealing part and a second sealing part, which are respectively formed in annular shape. The first sealing part and the second sealing part are both connected to the first mounting part and are spaced apart, so that a mating groove is defined between the first mounting part, the first sealing part and the second sealing part. The opening of the mating groove is set towards the position where the first mounting groove communicates with the first exhaust chamber. The first sealing part abuts against the bracket and the second sealing part abuts against the main bearing.

17. The horizontal rotary compressor according to claim 16, wherein, The side of the first mounting part that is away from the first sealing part and the second sealing part abuts against the groove wall of the first mounting groove.

18. The horizontal rotary compressor according to claim 16 or 17, wherein, Also includes: An elastic element is disposed in the mating groove and is used to apply an elastic force away from each other to the first sealing portion and the second sealing portion.

19. The horizontal rotary compressor according to any one of claims 1-18, wherein, The pump body structure also includes a main bearing, which is located on the side of the compression mechanism opposite to the secondary bearing. A first exhaust channel is formed on the pump body structure, and a second exhaust channel is formed on the second housing. The horizontal rotary compressor also includes: The bracket is located at one end of the second housing in the axial direction of the pump body structure and defines a first exhaust chamber between the second housing and the main bearing. The silencer chamber is connected to the back pressure chamber in sequence through the first exhaust channel, the first exhaust chamber and the second exhaust channel. A first housing having an air inlet is disposed on the side of the bracket opposite to the second housing and defines a low-pressure chamber communicating with the air inlet.

20. The horizontal rotary compressor according to claim 19, wherein, The compression mechanism includes a first cylinder, a second cylinder, and a partition plate. The partition plate is sandwiched between the first cylinder and the second cylinder. The compression chamber of the first cylinder is connected to the first exhaust chamber, and the compression chamber of the second cylinder is connected to the first exhaust chamber through the silencer chamber.

21. The horizontal rotary compressor according to any one of claims 1-20, wherein, The horizontal rotary compressor is used in vehicles, and the refrigerant used in the horizontal rotary compressor is carbon dioxide.

22. A horizontal rotary compressor, wherein, include: A housing having an air inlet and an air outlet formed thereon; A bracket is disposed on the housing and divides the interior of the housing into a low-pressure chamber and a high-pressure chamber. The low-pressure chamber is connected to the air inlet, and the high-pressure chamber is connected to the air outlet. A motor structure, wherein the motor structure is disposed in the low-pressure chamber; The pump body structure is located in the high-pressure chamber and includes a main bearing, a secondary bearing, and a crankshaft. The main bearing is located adjacent to the bracket and defines a first exhaust chamber between the main bearing and the bracket. The crankshaft passes through the secondary bearing and the main bearing and extends into the low-pressure chamber through a second through hole on the bracket to be connected to the motor structure for transmission. A first mounting groove communicating with the first exhaust chamber is formed between the main bearing and the bracket. The first mounting groove surrounds the crankshaft. A first sealing structure is disposed in the first mounting groove and separates the first exhaust chamber and the low-pressure chamber. The first sealing structure includes a first mounting portion, a first sealing portion and a second sealing portion, which are respectively formed in annular shape. The first sealing portion and the second sealing portion are both connected to the first mounting portion and are spaced apart, so that a mating groove is defined between the first mounting portion, the first sealing portion and the second sealing portion. The opening of the mating groove is disposed towards the position where the first mounting groove communicates with the first exhaust chamber. The first sealing portion abuts against the bracket and the second sealing portion abuts against the main bearing.

23. The horizontal rotary compressor according to claim 22, wherein, The side of the first mounting part that is away from the first sealing part and the second sealing part abuts against the groove wall of the first mounting groove.

24. The horizontal rotary compressor according to claim 22 or 23, wherein, The first mounting groove is formed on one side surface of the bracket corresponding to the first exhaust chamber, and the main bearing has a hub portion that mates with the crankshaft. The first mounting groove penetrates the wall of the second through hole, and the hub portion passes through the second through hole; or, The first mounting groove and the second through hole are arranged radially spaced along the crankshaft, and the hub portion abuts against the side surface of the bracket corresponding to the first exhaust chamber and covers a portion of the first mounting groove.

25. The horizontal rotary compressor according to claim 24, wherein, The first mounting groove penetrates the wall of the second through hole, and a guide surface is provided at the first mounting groove. The guide surface is adapted to guide the first sealing structure into the first mounting groove. The guide surface is provided at one end of the radially outer groove wall of the first mounting groove facing the first exhaust chamber, and / or the guide surface is provided at the groove opening position of the outer peripheral wall of the crankshaft corresponding to the first mounting groove.

26. The horizontal rotary compressor according to any one of claims 22-25, wherein, The bracket includes a central portion and an edge portion located on the same side of the first exhaust chamber along the axial direction. The second perforation and the first mounting groove are both formed on the central portion. The edge portion is arranged around the central portion. Along the crankshaft axis, the thickness of the central portion is greater than the thickness of the edge portion.

27. The horizontal rotary compressor according to claim 26, wherein, The depth H1 of the first mounting groove and the thickness H2 of the center part satisfy: H1 / H2≤3 / 4.

28. The horizontal rotary compressor according to any one of claims 22-27, wherein, The compression of the first sealing structure is 8% to 20%; and / or, The interference fit of the first sealing structure is 0.05–0.5 mm; and / or, The material of the first sealing structure is PA46, PTFE or PPS.

29. The horizontal rotary compressor according to any one of claims 22-28, wherein, Also includes: An elastic element is disposed in the mating groove and is used to apply an elastic force to the first sealing portion and the second sealing portion, moving them away from each other.

30. The horizontal rotary compressor according to claim 29, wherein, The elastic element is constructed to extend circumferentially spirally along the crankshaft, with one end of the elastic element inserted into the other end.

31. The horizontal rotary compressor according to claim 29 or 30, wherein, The overlapping portions at both ends of the elastic element extend spirally, with the overlapping portions consisting of 3 to 4 turns.

32. A horizontal rotary compressor, wherein, include: A housing having an air inlet formed thereon; A bracket is provided on the housing and divides the interior of the housing into a low-pressure chamber and a high-pressure chamber, the low-pressure chamber being connected to the air inlet; A compression mechanism, wherein the compression mechanism is disposed in a high-pressure chamber and has at least one compression chamber therein; A filter structure is provided between the air inlet and the inlet of the compression chamber, and includes a mounting bracket and a filter screen. The filter screen is provided on the mounting bracket and is formed into a cylindrical structure. The two axial ends of the filter screen are an upstream end and a downstream end, respectively. The mounting bracket closes the downstream end of the filter screen.

33. The horizontal rotary compressor according to claim 32, wherein, The mounting bracket includes a first skeleton part, a hollow part and a second skeleton part connected sequentially along the axial direction of the filter screen. The first skeleton part is formed into a ring structure. The filter screen is disposed in the hollow part. The two axial ends of the filter screen are respectively connected to the first skeleton part and the second skeleton part. The second skeleton part closes one axial end of the filter screen.

34. The horizontal rotary compressor according to claim 32 or 33, wherein, Also includes: The main bearing is sandwiched between the bracket and the compression mechanism. The compression chamber is connected to the low-pressure chamber through an air intake channel that passes through the bracket and the main bearing. The compression mechanism has a mating cavity that connects the air intake channel and at least one of the compression chambers. The filter structure passes through the air intake channel and the mating cavity. The filter screen is radially opposite to the inlet of the at least one of the compression chambers.

35. The horizontal rotary compressor according to claim 34, wherein, The bracket has a third mounting groove formed on its wall surface corresponding to the air intake channel. The third mounting groove extends through one end of the bracket facing the main bearing, and the mounting bracket is positioned and fitted into the third mounting groove; or, The mounting bracket has a first outward protrusion, which is sandwiched between the bracket and the main bearing; or... A heat shield is provided on the side of the bracket away from the main bearing, and the mounting bracket is fixedly connected to the heat shield, and / or the mounting bracket has a second outward protrusion sandwiched between the heat shield and the bracket.

36. The horizontal rotary compressor according to claim 35, wherein, A heat shield is provided on the side of the bracket away from the main bearing. A positioning hole is formed on the heat shield. The end of the mounting bracket extends out of the air intake channel and is positioned and fitted into the positioning hole.

37. A horizontal rotary compressor, wherein, include: case; A bracket is disposed on the housing and divides the interior of the housing into a low-pressure chamber and a high-pressure chamber, and a communication channel is formed on the bracket that communicates with the low-pressure chamber; The pump body structure is located in the high-pressure chamber and includes a main bearing, a secondary bearing, and a compression mechanism. The compression mechanism is sandwiched between the main bearing and the secondary bearing and has at least one compression chamber. The main bearing is fixed to the bracket and a first exhaust chamber communicating with the compression chamber is defined between them. An air intake channel communicating with the communication channel and the compression chamber is formed on the main bearing. A second sealing structure is disposed between the bracket and the main bearing and surrounds the air intake channel to separate the first exhaust chamber from the air intake channel.

38. The horizontal rotary compressor according to claim 37, wherein, A second mounting groove is formed between the bracket and the main bearing, surrounding the air intake channel, and the second sealing structure is disposed in the second mounting groove.

39. The horizontal rotary compressor according to claim 37 or 38, wherein, The second sealing structure includes a support member and a sealing member. The support member is an annular structure, and the sealing member is completely wrapped around the support member. The elastic modulus of the support member is greater than that of the sealing member.

40. The horizontal rotary compressor according to claim 39, wherein, At least one of the two axial ends of the seal has an annular rib.

41. The horizontal rotary compressor according to claim 40, wherein, In the radial direction of the seal, the annular rib is offset from the support.

42. The horizontal rotary compressor according to any one of claims 39-41, wherein, The support component is made of metal or plastic, and the sealing component is made of rubber.

43. The horizontal rotary compressor according to any one of claims 37-42, wherein, A second mounting groove is formed between the bracket and the main bearing, surrounding the air intake channel. The second mounting groove communicates with the first exhaust chamber, and the second sealing structure is disposed in the second mounting groove. The second sealing structure is an integral piece and includes a second mounting part, a third sealing part and a fourth sealing part that are respectively formed in annular shape. The third sealing part and the fourth sealing part are both connected to the outer peripheral wall of the second mounting part and are spaced apart along the axial direction. The third sealing part abuts against the bracket and the fourth sealing part abuts against the main bearing.

44. The horizontal rotary compressor according to any one of claims 37-43, wherein, The compression of the second sealing structure is 8% to 20%.

45. An air conditioning system, wherein, Includes the horizontal rotary compressor according to any one of claims 1-44.

46. ​​A vehicle, wherein, Includes the horizontal rotary compressor according to any one of claims 1-44 or the air conditioning system according to claim 45.

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