Rotary compressor, air conditioning system and vehicle

Abstract

The utility model discloses a rotary compressor, air conditioning system and vehicle relates to compressor field. Rotary compressor includes: casing, support, motor structure, pump body structure and first sealing structure, and support is located at casing and will its inside divide into low pressure chamber and high pressure chamber, pump body structure is located at high pressure chamber, and includes main, vice bearing and crankshaft, and the first exhaust chamber is defined between main bearing and support, and the first mounting groove of setting around crankshaft is equipped with the support, first sealing structure is located at the first mounting groove, and the first exhaust chamber and low pressure chamber are separated, and first sealing structure includes respectively the first installation part, first sealing part and second sealing part of annular, and first sealing part and second sealing part all are connected to the outside of first installation part and interval setting, make the cooperation groove be defined between three, and first sealing part is stopped with the support, and second sealing part is stopped with main bearing. This rotary compressor improves internal sealing effect, improves compression efficiency and operating stability.

Description

Technical Field

[0001] This utility model relates to the field of compressors, and in particular to a rotary compressor, an air conditioning system, and a vehicle. Background Technology

[0002] In the field of compressor technology, especially rotary compressors, traditional direct metal-to-metal seals face challenges due to their high precision requirements and complex manufacturing processes. Some solutions employ a combination of O-rings and retaining rings for sealing. For refrigerants operating under high temperature and pressure, such as carbon dioxide, traditional O-ring seals often fail, preventing airflow within the compressor from following the intended path and affecting compressor performance. For example, with high-temperature and high-pressure refrigerants like CO2, O-rings are prone to foaming, cracking, or creep under prolonged high temperature and pressure, leading to seal failure.

[0003] Therefore, there is room for improvement in the sealing performance of the compressor. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a rotary compressor that improves internal sealing, thereby increasing compression efficiency and operational stability.

[0005] A rotary compressor according to an embodiment of the present invention includes: a housing having an air inlet and an air outlet; a bracket 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 air inlet and the high-pressure chamber communicating with the air outlet; a motor mechanism disposed in the low-pressure chamber; and a pump body structure disposed in the high-pressure chamber, including a main bearing, a secondary bearing, and a crankshaft. The main bearing is disposed adjacent to the bracket and defines a first exhaust chamber between itself and the bracket. The crankshaft passes through the secondary bearing and the main bearing and extends into the low-pressure chamber through a perforation on the bracket for transmission connection with the motor structure. A distance is formed between the main bearing and the bracket. The crankshaft is provided with a first mounting groove communicating with the first exhaust chamber. The first mounting groove 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.

[0006] According to an embodiment of the present invention, the 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.

[0007] In some embodiments, the side of the first mounting portion opposite to the first sealing portion and the second sealing portion abuts against the groove wall of the first mounting groove.

[0008] In some embodiments, the first mounting groove is formed on one side surface of the bracket corresponding to the first exhaust chamber, the main bearing has a hub portion that mates with the crankshaft, the first mounting groove penetrates the wall of the through hole, and the hub portion passes through the through hole; or, the first mounting groove and the through hole are radially spaced along the crankshaft, and the hub portion abuts against one side surface of the bracket corresponding to the first exhaust chamber and covers a portion of the first mounting groove.

[0009] In some embodiments, the first mounting groove penetrates the wall of the perforation, 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 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.

[0010] In some embodiments, 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 perforation and the first mounting groove are both formed on the central portion, and the edge portion is disposed around the central portion. Along the crankshaft axial direction, the thickness of the central portion is greater than the thickness of the edge portion.

[0011] In some embodiments, the depth H1 of the first mounting groove and the thickness H2 of the center portion satisfy: H1 / H2≤3 / 4.

[0012] In some embodiments, the compression of the first sealing structure is 8% to 20%; and / or, the interference of the first sealing structure is 0.05 to 0.5 mm; and / or, the material of the first sealing structure is PA46, PTFE or PPS.

[0013] In some embodiments, the rotary compressor further includes an elastic element disposed in the mating groove and used to apply an elastic force to the first sealing portion and the second sealing portion at a distance from each other.

[0014] In some embodiments, the elastic element is configured to extend circumferentially helically along the crankshaft, with one end of the elastic element fitting into the other end.

[0015] In some embodiments, the overlapping portions at both ends of the elastic member extend spirally, and the overlapping portions are 3 to 4 turns.

[0016] In some embodiments, the pump body structure further includes a compression mechanism sandwiched between the main bearing and the auxiliary bearing, the compression mechanism having at least one compression chamber communicating with the first exhaust chamber, the compression chamber communicating with the low-pressure chamber through an intake passage passing through the bracket and the main bearing, the rotary compressor further including a second sealing structure disposed between the bracket and the main bearing and surrounding the intake passage to separate the first exhaust chamber from the intake passage; and / or, the rotary compressor further including a filter structure disposed between the intake port and the inlet of the compression chamber.

[0017] In some embodiments, the rotary compressor includes a second sealing structure, which is an integral part and has the same structure as the first sealing structure; or, the second sealing structure includes a support and a sealing element, wherein the sealing element is completely enclosed by the support, and the elastic modulus of the support is greater than that of the sealing element.

[0018] In some embodiments, the rotary compressor includes a filter structure, the compression mechanism forms a mating cavity, the mating cavity communicates the intake passage and at least one of the compression chambers, the filter structure passes through the intake passage and the mating cavity, the filter screen of the filter structure is radially opposite to the inlet of the at least one of the compression chambers, and the second sealing structure is sleeved on the outside of the filter structure.

[0019] In some embodiments, the bracket has a third mounting groove formed on the wall surface corresponding to the air intake channel, the third mounting groove passing through one end of the bracket facing the main bearing, and the filter structure being limited and fitted into the third mounting groove; or, the filter structure has a first flange portion sandwiched between the bracket and the main bearing; or, the bracket has a heat insulation cover on the side facing away from the main bearing, and the filter structure is fixedly connected to the heat insulation cover, and / or, the filter structure has a second flange portion sandwiched between the heat insulation cover and the bracket.

[0020] In some embodiments, the rotary compressor includes a filter structure, the filter structure including a mounting frame and a filter screen, the mounting frame including a first skeleton portion, a hollow portion and a second skeleton portion arranged sequentially along the airflow direction, the filter screen being formed into a cylindrical structure and at least a majority of the filter screen being disposed in the hollow portion, and the second skeleton portion closing one axial end of the filter screen.

[0021] In some embodiments, the rotary compressor is a carbon dioxide compressor.

[0022] In some embodiments, a second exhaust chamber is defined between the pump body structure and the inner wall of the high-pressure chamber, which communicates with the air outlet, and a first exhaust passage is formed on the housing, communicating with the first exhaust chamber and the second exhaust chamber.

[0023] In some embodiments, the compression mechanism includes a first cylinder, a second cylinder, and a partition plate, the partition plate being sandwiched between the first cylinder and the second cylinder, the first cylinder and the second cylinder each having a compression chamber, the compression chamber of the first cylinder communicating with the first exhaust chamber, and the compression chamber of the second cylinder communicating with the first exhaust chamber through a second exhaust channel on the pump body structure.

[0024] In some embodiments, the pump body structure further includes a muffler disposed on the auxiliary bearing, the muffler and the auxiliary bearing forming a muffler cavity as part of the second exhaust passage, the housing and the auxiliary bearing defining an oil return cavity communicating with the low-pressure cavity, and the rotary compressor further includes a third sealing structure, the third sealing structure being an integral piece and sealing between the muffler and the auxiliary bearing, and between the housing and the auxiliary bearing, to separate the muffler cavity from the oil return cavity and the second exhaust cavity from the oil return cavity.

[0025] An air conditioning system according to a second aspect of the present invention includes a rotary compressor as described in a first aspect of the present application.

[0026] The vehicle according to a third aspect embodiment of the present invention includes the air conditioning system described in the second aspect embodiment of the present application.

[0027] Additional aspects and advantages of this invention 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 the invention. Attached Figure Description

[0028] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0029] Figure 1This is a schematic diagram of the rotary compressor in some embodiments of the present invention, with arrows indicating the direction of refrigerant flow;

[0030] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0031] Figure 3 for Figure 1 A magnified view of a section at point C;

[0032] Figure 4 for Figure 2 A schematic diagram of the assembly of the first sealing structure and the elastic element shown in the figure;

[0033] Figure 5 for Figure 4 A cross-sectional view of the first sealing structure and the elastic element shown;

[0034] Figure 6 for Figure 5 A partial schematic diagram of the first sealing structure and elastic element shown;

[0035] Figure 7 This is a schematic diagram of the bracket, main bearing, and first sealing structure in other embodiments of the present invention;

[0036] Figure 8 This is a partial schematic diagram of a rotary compressor in some embodiments of the present invention;

[0037] Figure 9 for Figure 8 A partial schematic diagram of the bracket shown;

[0038] Figure 10 for Figure 8 A magnified view of a section at point B in the middle;

[0039] Figure 11 for Figure 10 A schematic diagram of the second sealing structure shown;

[0040] Figure 12 This is a schematic diagram of the installation of the second sealing structure and filter structure in other embodiments of the present invention;

[0041] Figure 13 This is a schematic diagram of the installation of the second sealing structure and the filter structure in some embodiments of the present invention;

[0042] Figure 14 This is a schematic diagram of the installation of the filter structure according to some embodiments of the present invention;

[0043] Figure 15 This is a schematic diagram of the installation of the filter structure in some other embodiments of the present invention;

[0044] Figure 16 This is a schematic diagram of a vehicle in some embodiments of the present invention.

[0045] Figure label:

[0046] Vehicle 3000, Air conditioning system 2000, Rotary compressor 1000

[0047] Housing 100, First Housing 110, Second Housing 120, Low-Pressure Chamber 130, High-Pressure Chamber 140, First Exhaust Chamber 150, Second Exhaust Chamber 160, Bracket 200, Intake Channel 211, Third Mounting Slot 2111, Perforation 212, First Mounting Slot 2121, Guide Surface 213, Center Part 220, Edge Part 230, Pump Body Structure 300, Main Bearing 310, Second Mounting Slot 312, Hub Part 313, Secondary Bearing 320, Compression Mechanism 330, First Cylinder 331, Second Cylinder 332, Compression Chamber 333, Inlet 333a, Partition Plate 334, Mating Chamber 335, Crankshaft 340, Muffler 350 Silencing cavity 351, heat insulation cover 360, 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, support member 510, sealing member 520, second mounting part 530, third sealing part 540, fourth sealing part 550, third sealing structure 600, filter structure 700, first flange part 700a, second flange part 700b, mounting bracket 710, first skeleton part 711, hollow part 712, second skeleton part 713, filter screen 720, first exhaust channel 810, second exhaust channel 820, oil return cavity 830. Detailed Implementation

[0048] The embodiments of this utility model 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 utility model, and should not be construed as limiting this utility model.

[0049] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. 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 the invention. 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, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0050] 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.

[0051] The following is for reference. Figures 1-15 This invention describes a rotary compressor 1000 according to a first aspect of the present invention. The rotary compressor 1000 of the present invention can be a single-cylinder single-exhaust compressor, a single-cylinder double-exhaust compressor, a double-cylinder compressor, etc.

[0052] It is worth noting that the application field of the rotary compressor 1000 of this utility model embodiment is 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 refrigerators, freezers, heat pump water heaters, new energy vehicle thermal management systems and other equipment.

[0053] like Figure 1 As shown, a rotary compressor 1000 according to an embodiment of the present invention 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 rotary compressor 1000. The inlet is used to introduce gas to be compressed, while the outlet is responsible for discharging the compressed high-pressure gas.

[0054] In some embodiments, the air inlet and air outlet are arranged at intervals along the axial direction of the 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. Figure 1 In this invention, the direction of extension of the central axis L of the rotary compressor 1000 is called the axial direction of the rotary compressor 1000 (i.e., the axial direction of the crankshaft 340). In the radial plane, the direction passing through the central axis L of the rotary compressor 1000 is called the radial direction of the rotary compressor 1000, and the direction around the central axis L is called the circumferential direction of the rotary compressor 1000 (i.e., the circumferential direction of the crankshaft 340).

[0055] The 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.

[0056] In some optional embodiments, the 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 rotary compressor 1000, and reduces the risk of compressor downtime due to motor structure failure.

[0057] Furthermore, the aforementioned partitioning of the bracket 200 facilitates the use of the low-pressure chamber 130 as a liquid storage chamber for the rotary compressor 1000 to a certain extent, thus making the rotary compressor 1000 of this application applicable to scenarios without a liquid storage structure.

[0058] 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.

[0059] Combination Figure 1 and Figure 8 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 can be directly or indirectly connected to the compression chamber 333 of the rotary compressor 1000.

[0060] The crankshaft 340 passes through the auxiliary bearing 320 and the main bearing 310 and extends into the low-pressure chamber 130 through the 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.

[0061] 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.

[0062] A 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 perforation 212 is configured to fit the size, shape, and trajectory of the crankshaft 340 to ensure that the crankshaft 340 can pass smoothly and be positioned accurately.

[0063] As is known, the low-pressure chamber 130 is typically used to collect, store, and transfer refrigerant gas at low pressure. During the operating cycle of the 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, to maintain the pressure balance and efficient operation of the high-pressure chamber 150 inside the rotary compressor 1000, the sealing between the low-pressure chamber 130 and the high-pressure chamber 150 is crucial.

[0064] To achieve a sealing effect, combined with Figure 2 In this embodiment of the invention, a first mounting groove 2121 communicating with the first exhaust chamber 150 is formed between the main bearing 310 and the bracket 200, and the first mounting groove 2121 is arranged around the crankshaft 340. The 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.

[0065] 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.

[0066] Meanwhile, considering the continuous motion of the crankshaft 340 during the operation of the 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.

[0067] 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 (e.g., Figure 2 and Figure 7 (as shown), or, a first groove is formed on the main bearing 310, and a second groove is formed on the bracket 200, and the first groove and the second groove are joined together to form a first mounting groove 2121.

[0068] like Figure 2 , Figures 4-7 As shown, 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.

[0069] 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 431 and the second sealing portion 432 can fit tightly against the sealing surface, adapting to the irregularities of the sealing surface and improving the sealing effect.

[0070] 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 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.

[0071] 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 rotary compressor 1000.

[0072] 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.

[0073] In some embodiments, such as Figure 2 and Figure 7 As shown, the side of the first mounting part 410 that is away from the first sealing part 420 and the second sealing part 430 abuts against the groove wall of the first mounting groove 2121, which helps to improve the stability of the first sealing structure 400 setting position and makes it less likely to shift.

[0074] 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 rotary compressor 1000 during operation.

[0075] In some embodiments, such as Figure 2 and Figure 7As shown, the 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 to the side facing the first exhaust chamber 150. The main bearing 310 has a hub portion 313 that mates with the crankshaft 340. The crankshaft 340 passes through the hub portion 313 to achieve a reliable fit between the crankshaft 340 and the main bearing 310.

[0076] like Figure 2 As shown, the first mounting groove 2121 penetrates the wall of the through hole 212, and the hub portion 313 passes through the through hole 212. At this time, the radially inner side of the first mounting groove 2121 is also open, while the 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 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.

[0077] For example, such as Figure 2 As shown, 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 on the radially inner side of the first mounting groove 2121. The hub portion 313 passes through the 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 chamber 150, so that the groove opening of the mating groove 440 is arranged in the axial direction of the crankshaft 340 facing the first exhaust chamber 150. Optionally, the side of the first mounting portion 410 away from the first exhaust chamber 150 can abut against the groove wall of the first mounting groove 2121 away from the first exhaust chamber 150.

[0078] Or, such as Figure 7 As shown, the first mounting groove 2121 and the through hole 212 are arranged radially at intervals along the crankshaft 340. The 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 radial 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.

[0079] For example, such as Figure 7As shown, 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 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.

[0080] It is understandable that when the first mounting groove 2121 and the 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 abuts against the bracket 200 (e.g., Figure 7 As shown), at this time, the hub 313 may not be inserted through the through hole 212; or the outer peripheral wall of the hub 313 may have a stepped portion formed, which abuts against the bracket 200, and at this time the hub 313 may be inserted through the through hole 212.

[0081] In some embodiments, such as Figure 2 The first mounting groove 2121 penetrates the wall of the 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, thereby optimizing 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 provides a smooth transition area, reducing friction and collision between the first sealing structure 400 and the edge of the first mounting groove 2121, thus reducing assembly difficulty and the risk of damage. Furthermore, the guide surface 213 also has a guiding function, ensuring that the first sealing structure 400 accurately enters the first mounting groove 2121 according to a predetermined trajectory and direction during installation. This precise guiding mechanism not only improves assembly efficiency and accuracy but also helps maintain the compactness and stability of the internal structure of the rotary compressor 1000.

[0082] 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.

[0083] 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, such as... Figure 2 As shown, guide surfaces 213 are provided on the outer wall of the first mounting groove 2121 and the outer peripheral wall of the crankshaft 340, which will further improve the convenience of assembly.

[0084] Of course, when the first mounting groove 2121 and the 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.

[0085] In some embodiments, such as Figure 8 and Figure 9 As shown, 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 rotary compressor 1000 (i.e., the axial direction of the crankshaft 340). The through hole 212 and the first mounting groove 2121 are both formed on the central portion 220, and the edge portion 230 is arranged 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.

[0086] Specifically, both the 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 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.

[0087] 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.

[0088] In some embodiments, such as Figure 9As shown, the depth H1 of the first mounting groove 2121 and the thickness H2 of the central portion 220 satisfy the condition: 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 below 3 / 4, it can be ensured that the depth of the first mounting groove 2121 is not too deep, leaving sufficient material thickness for the central portion 220 to withstand various forces and stresses during the operation of the rotary compressor 1000, thereby improving operational reliability.

[0089] 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 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.

[0090] It is worth noting that the compression amount refers to the percentage of the difference in height 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, such as... Figure 2 As shown, the first sealing structure 400 is radially compressed after assembly. The compression amount refers to the ratio of the radially compressed dimension of the first sealing structure 400 after assembly to its radial dimension before assembly; for example... Figure 7 As shown, the first sealing structure 400 is axially compressed after assembly. The amount of compression refers to the proportion of the axial dimension of the first sealing structure 400 after assembly to its axial dimension before assembly.

[0091] 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 rotary compressor 1000.

[0092] As can be seen, in the design of the sealing structure of the 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.

[0093] Optionally, the interference fit of the first sealing structure 400 can be 0.05mm, 0.15mm, 0.35mm, 0.4mm, 0.5mm, etc. Controlling the interference fit of the first sealing structure 400 to 0.05-0.5mm here ensures that the rotary compressor 1000 achieves efficient sealing while maintaining structural stability and reliability.

[0094] In some embodiments, such as Figure 2 , Figures 4-7 As shown, the rotary compressor 1000 further includes an elastic element 450, which is disposed in the mating groove 440 and is located between the first sealing part 420 and the second sealing part 430; wherein the elastic element 450 is used to apply an elastic force to the first sealing part 420 and the second sealing part 430 to move them away from each other.

[0095] When the 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 risk due to poor sealing.

[0096] Optionally, the elastic element 450 is made of stainless steel; however, the material of the elastic element 450 is not limited to this.

[0097] In some embodiments, such as Figures 4-6 As shown, the elastic element 450 is constructed to extend circumferentially spirally along the crankshaft 340, with one end of the elastic element 450 inserted into the other end. Therefore, the elastic element 450 can be made of a helical spring, facilitating its molding. Simultaneously, the insertion and 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 a certain degree of support for the entire first sealing structure 400.

[0098] by Figure 4For 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 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.

[0099] 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.

[0100] In some embodiments, such as Figure 4 As shown, the outer diameter of one end of the elastic element 450 is smaller than the inner diameter of the other end. This reduces the assembly difficulty when the elastic elements 450 are connected end to end, facilitates insertion and mating, and improves the flexibility of the elastic element 450 in use.

[0101] 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.

[0102] In some embodiments, combined with Figure 4 The overlapping portions R at both ends of the elastic element 450 extend spirally, with each overlapping portion R consisting of 3 to 4 turns. This ensures, on the one hand, that the two ends of the elastic element 450 are firmly connected and will not easily separate due to vibration or pressure fluctuations, thus 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 is 3 turns, then the 3 turns at one end of the elastic element 450 interlock 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.

[0103] 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 rotary compressor 1000 operates, 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.

[0104] like Figure 1 As shown, 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 into high-pressure gas.

[0105] 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.

[0106] Combination Figure 7 As shown, 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.

[0107] Among them, such as Figures 7-13 As shown, 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 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 Figure 7 , Figures 12-15 As shown, the 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.

[0108] 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.

[0109] To ensure the sealing and efficiency of the compression process, the rotary compressor 1000 also includes a second sealing structure 500. The second sealing structure 500 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, preventing backflow of high-pressure gas or leakage of low-pressure gas, thereby ensuring the smooth operation of the entire compression process.

[0110] 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 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 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.

[0111] During the operation of the rotary compressor 1000, minute impurities in the surrounding environment, such as dust and other fine particles, may enter the pump body structure 300 through unsealed gaps, or impurities in the piping system connected to the 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 even malfunctions. For example, the precision of the pump body structure of a rolling rotor compressor is at the micrometer level; impurities larger than the micrometer level may cause the rotor to stall.

[0112] 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 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 rotary compressor operation.

[0113] Optionally, the filter structure 700 is disposed within the housing 100 to reduce the external footprint of the rotary compressor 1000.

[0114] 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 gas 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 rotary compressor 1000, extending the service life of the rotary compressor 1000. Therefore, the specific location of the filter structure 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 rotary compressor 1000, or at the inlet 333a of the compression chamber 333, or downstream of the air inlet of the 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 211). It can be understood that there can also be multiple filter structures 700.

[0115] 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 rotary compressor 1000 suitable for scenarios without a liquid receiver.

[0116] Optionally, such as Figure 8 , Figure 10 As shown, at least one of the bracket 200 and the main bearing 310 has a second mounting groove 312 arranged around the air intake passage 211, and the second sealing structure 500 is disposed in the second mounting groove 312.

[0117] In some embodiments, such as Figure 13 As shown, the rotary compressor 1000 includes a second sealing structure 500, which is an integral piece 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.

[0118] 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.

[0119] Of course, this application is not limited to this; there are also some embodiments, such as Figures 10-12 As shown, 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 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, thus 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 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.

[0120] 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.

[0121] 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.

[0122] 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.

[0123] In some embodiments, such as Figure 10 , Figure 12 and Figure 13 As shown, the rotary compressor 1000 includes a second sealing structure 500 and a filter structure 700. The filter structure 700 is located at the air intake channel 211, and the second sealing structure 500 is sleeved outside the filter structure 700. At this time, 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.

[0124] Furthermore, such as Figure 8 , Figure 12 and Figure 13 As shown, 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 rotary compressor 1000.

[0125] 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.

[0126] For example, such as Figure 8 , Figure 12 and Figure 13As shown, 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 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.

[0127] 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.

[0128] 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.

[0129] In some embodiments, such as Figure 12 and Figure 13 As shown, 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 the 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.

[0130] 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.

[0131] Of course, the installation configuration of the filter structure 700 is not limited to this. In other embodiments, such as Figure 14 As shown, the filter structure 700 has a first flange 700a, which is sandwiched between the bracket 200 and the main bearing 310. This flange also restricts the axial movement of the filter structure 700, ensuring reliable installation. For example, the first flange 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 instance, the first flange 700a can be formed as a rib extending in an annular shape circumferentially along the filter screen 720.

[0132] It is understood that the first flange 700a can be located at the end of the mounting bracket 710 in the axial direction of the filter screen 720, or the first flange 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 flange 700a, or neither the bracket 200 nor the main bearing 310 is connected to the first flange 700a. In this case, the first flange 700a can be clamped and fixed by the connection 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.

[0133] For example, the first flange 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 flange 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 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 flange 700a is formed at the end of the first skeleton part 711 away from the second skeleton part 713, and the filter screen 720 and the hollow part 712 pass through the main bearing 310. Of course, the first flange 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.

[0134] In some embodiments, such as Figure 15As shown, 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 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 flange 700b sandwiched between the heat insulation cover 360 and the bracket 200. For example, the second flange 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 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. 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.

[0135] It is understood that the second flange 700b can be located at the end of the mounting bracket 710 in the axial direction of the filter screen 720, or the second flange 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 flange 700b, or neither the heat insulation cover 360 nor the bracket 200 is connected to the second flange 700b. In this case, the second flange 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 flange 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 213a of the compression chamber 333, the second flange 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 flange 700b is formed at the end of the first skeleton portion 711 away from the second skeleton portion 713. Of course, the first flange 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.

[0136] 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.

[0137] For the various installation schemes of the filter structure 700, whether through the third mounting groove 2111, the first flange 700a, the heat insulation cover 360, or the second flange 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 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.

[0138] In some embodiments, such as Figure 7 , Figures 12-15 As shown, 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 into the filter screen 720, while the mounting bracket 710 closes the opening at the downstream end of the filter screen 720. The airflow into 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 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 210 passes through the filter screen 720 before flowing to 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.

[0139] 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 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 rotary compressor 1000.

[0140] In some embodiments, such as Figure 7 , Figures 12-15 As shown, the mounting bracket 710 includes a first frame portion 711, a perforated portion 712, and a second frame portion 713 arranged sequentially in the airflow direction. The first frame portion 711 is formed into a ring structure, and at least most 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 frame portion 711 and the second frame portion 713, and the second frame portion 713 closes one axial end of the filter screen 720. Thus, the internal space of the first frame 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.

[0141] 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.

[0142] like Figure 1 As shown, 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 rotary compressor 100. A first 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 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 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 first 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 exhaust chamber 150, so as to realize the back pressure design of the rotary compressor 1000.

[0143] In some embodiments, such as Figure 7 As shown, 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 the second exhaust channel 820 on the pump body structure 300. 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 first exhaust channel 810. The refrigerant compressed in the second cylinder 332 flows sequentially through the second exhaust channel 820 and the first exhaust chamber 150 before flowing to the first exhaust channel 810. Therefore, the refrigerant flowing out of the first cylinder 331 and the second cylinder 332 can converge in the first exhaust chamber 150.

[0144] 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 rotary compressor 1000, shortens the compression cycle, and thus improves the working efficiency of the 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 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 rotary compressor 1000 but also reduces noise caused by vibration.

[0145] The compression chamber 333 of the second cylinder 332 is connected to the first exhaust chamber 150 through the second 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 flow into the first exhaust chamber 150, thereby making the exhaust process stable and reliable.

[0146] In some embodiments, such as Figure 1 , Figure 7As shown, the pump body structure 300 also 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 second exhaust passage 820. The housing 100 and the auxiliary bearing 320 define an oil return cavity 830 that communicates with the low-pressure cavity 130. The oil return cavity 830 can be located at the end of the auxiliary bearing 320 away from the main bearing 310. The rotary compressor 1000 also 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 830 and the second exhaust cavity 160 from the oil return cavity 830.

[0147] 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 helps reduce the number of sealing structures and simplifies the structure and assembly of the rotary compressor 1000. The silencing cavity 351 between the silencer 350 and the auxiliary bearing 320, as part of the second exhaust passage 820, reduces noise generated during exhaust, enabling the rotary compressor 1000 to maintain a lower noise level during operation and providing a quieter environment for the user.

[0148] To ensure the sealing and independence of the internal chambers of the rotary compressor 1000, such as Figure 3 As shown, this utility model also includes a third sealing structure 600, which is an integral piece and has strong reliability. Figure 3As shown in the cross-section, the third sealing structure 600 extends axially along the rotary compressor 1000. One axial end of the third sealing structure 600 seals between the muffler 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 muffler chamber 351 from the oil return chamber 830, and also separates the second exhaust chamber 160 from the oil return chamber 830. Therefore, the third sealing structure 600 improves the sealing efficiency inside the rotary compressor 1000, effectively preventing the mixing of gas and oil between different chambers, and also avoiding leakage of internal pressure in the rotary compressor 1000, ensuring stable operation and high efficiency of the rotary compressor 1000. The oil return chamber 830, 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 830, and the silencing chamber 351 can be located on the part of the pump body structure 300 adjacent to the second exhaust chamber 160. Thus, the positions of the oil return chamber 830, 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.

[0149] like Figure 1 As shown, the oil return chamber 830 defined between the housing 100 and the auxiliary bearing 320 is a component of the lubrication system of the rotary compressor 1000. The oil return chamber 830 is responsible for receiving used oil, which can 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 forms an internal circulation of lubricating oil, which is beneficial for improving lubrication. The layout of the oil return chamber 830 not only ensures the full recovery and utilization of lubricating oil but also reduces oil waste. At the same time, since the oil return chamber 830 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.

[0150] In some optional embodiments, the rotary compressor 1000 is a horizontal compressor used in vehicles, and the refrigerant of the rotary compressor 1000 is carbon dioxide refrigerant; or, in other words, the rotary compressor 1000 is a carbon dioxide compressor. Carbon dioxide has a higher intake and exhaust pressure than traditional refrigerants when used as a refrigerant. The 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, using carbon dioxide as a refrigerant does not require a large volume of the compressor's compression chamber, 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 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 rotary compressor 1000 is not limited to this.

[0151] 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.

[0152] An air conditioning system 2000 according to a second aspect embodiment of the present invention includes a rotary compressor 1000 according to a first aspect embodiment of the present application. The air conditioning system 2000 of the present invention integrates a highly efficient and reliable rotary compressor 1000, improving the working efficiency of the air conditioning system 2000. It is worth noting that the type of air conditioning system 2000 according to the embodiments of the present application 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, etc., and a split air conditioning unit can include a wall-mounted air conditioner or a floor-standing air conditioner, etc.

[0153] The vehicle 3000 according to a third aspect embodiment of the present invention includes the air conditioning system 2000 of the second aspect embodiment of the present application. It is worth noting that the specific type of vehicle 3000 referred to in this application is not limited. For example, vehicle 3000 can be a gasoline vehicle, a natural gas 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.). Through the vehicle 3000 of the present invention, utilizing the improved air conditioning system 3000, a comfortable temperature environment can be quickly reached and maintained inside the vehicle 3000, providing a comfortable riding experience for passengers. At the same time, the high efficiency of the air conditioning system 2000 helps to reduce the energy consumption of the vehicle 3000 and improve the energy utilization rate of the vehicle 3000.

[0154] 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.

[0155] In the description of this utility model, it should be understood that the terms "length," "width," "depth," "upper," "lower," "front," "rear," "inner," "outer," "axial," and "radial," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model 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 utility model. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0156] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0157] 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 the present invention. 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.

[0158] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A rotary compressor, characterized in that, 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 perforation 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.

2. The rotary compressor according to claim 1, characterized in that, 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.

3. The rotary compressor according to claim 1, characterized in that, 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 through hole, and the hub portion passes through the through hole; or, The first mounting groove and the perforation 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.

4. The rotary compressor according to claim 3, characterized in that, The first mounting groove penetrates the wall of the perforation, and a guide surface is provided at the first mounting groove, the guide surface being 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.

5. The rotary compressor according to claim 1, characterized in that, 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 perforation and the first mounting groove are both formed on the central portion, and 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.

6. The rotary compressor according to claim 5, characterized in that, The depth H1 of the first mounting groove and the thickness H2 of the center part satisfy: H1 / H2≤3 / 4.

7. The rotary compressor according to claim 1, characterized in that, 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.

8. The rotary compressor according to any one of claims 1-7, characterized in that, 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.

9. The rotary compressor according to claim 8, characterized in that, The elastic element is constructed to extend circumferentially spirally along the crankshaft, with one end of the elastic element inserted into the other end.

10. The rotary compressor according to claim 8, characterized in that, The overlapping portions at both ends of the elastic element extend spirally, with the overlapping portions consisting of 3 to 4 turns.

11. The rotary compressor according to claim 1, characterized in that, The pump body structure further includes a compression mechanism sandwiched between the main bearing and the auxiliary bearing. The compression mechanism has at least one compression chamber, which communicates with the first exhaust chamber. The compression chamber is connected to the low-pressure chamber through an air intake channel, which passes through the bracket and the main bearing. The rotary compressor also 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 rotary compressor also includes a filter structure disposed between the air inlet and the inlet of the compression chamber.

12. The rotary compressor according to claim 11, characterized in that, The rotary compressor includes a second sealing structure, which is an integral part and has the same structure as the first sealing structure; or the second sealing structure includes a support and a sealing element, wherein the sealing element is completely wrapped around the support, and the elastic modulus of the support is greater than that of the sealing element.

13. The rotary compressor according to claim 11, characterized in that, The rotary compressor includes a filter structure. 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 of the filter structure is radially opposite to the inlet of the at least one of the compression chambers. The second sealing structure is sleeved on the outside of the filter structure.

14. The rotary compressor according to claim 13, characterized in that, 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 filter structure is fitted into the third mounting groove; or, The filter structure has a first flange, which is sandwiched between the bracket and the main bearing; or... A heat insulation cover is provided on the side of the bracket away from the main bearing, and the filter structure is fixedly connected to the heat insulation cover, and / or the filter structure has a second flange portion sandwiched between the heat insulation cover and the bracket.

15. The rotary compressor according to claim 11, characterized in that, The rotary compressor includes a filter structure, which includes a mounting frame and a filter screen. The mounting frame includes a first skeleton part, a hollow part, and a second skeleton part arranged sequentially along the airflow direction. The filter screen is formed into a cylindrical structure, and at least most of the filter screen is located in the hollow part. The second skeleton part closes one axial end of the filter screen.

16. The rotary compressor according to claim 1, characterized in that, The rotary compressor is a horizontal compressor used in vehicles, and the refrigerant of the rotary compressor is carbon dioxide.

17. The rotary compressor according to claim 11, characterized in that, The pump body structure and the inner wall of the high-pressure chamber define a second exhaust chamber that communicates with the air outlet, and a first exhaust channel is formed on the housing that communicates with the first exhaust chamber and the second exhaust chamber.

18. The rotary compressor according to claim 17, characterized in that, 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 first cylinder and the second cylinder each have a compression chamber. The compression chamber of the first cylinder is connected to the first exhaust chamber. The compression chamber of the second cylinder is connected to the first exhaust chamber through a second exhaust channel on the pump body structure.

19. The rotary compressor according to claim 18, characterized in that, The pump body structure also includes a muffler disposed on the auxiliary bearing, the muffler cavity between the muffler and the auxiliary bearing forming part of the second exhaust channel, and a return oil cavity communicating with the low-pressure cavity is defined between the housing and the auxiliary bearing. The rotary compressor further includes a third sealing structure, which is an integral piece and is sealed between the muffler and the auxiliary bearing, and between the housing and the auxiliary bearing, to separate the muffler chamber from the oil return chamber and the second exhaust chamber from the oil return chamber.

20. An air conditioning system, characterized in that, Includes the rotary compressor according to any one of claims 1-19.

21. A vehicle, characterized in that, Including the air conditioning system according to claim 20.

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