Rotary compressor and cooling apparatus

Abstract

This application discloses a rotary compressor and cooling device, including a housing assembly, a motor assembly, and a pump assembly. The housing assembly has a mounting cavity, an inlet, an outlet, and a suction port. The motor assembly and the pump assembly are respectively installed at both ends of the mounting cavity. The pump assembly includes a crankshaft, a cylinder, a main bearing, a secondary bearing, a first silencer, and a second silencer. The cylinder is connected to the suction port. One end of the crankshaft is connected to the motor assembly, and the other end of the crankshaft is connected to the piston of the cylinder. The first silencer is sealed to the main bearing and the inner wall of the mounting cavity, forming a first silencer cavity. The first silencer separates the cavity containing the motor assembly from the cavity containing the pump assembly, forming a low-pressure cavity and a high-pressure cavity. The second silencer is connected to the secondary bearing, forming a second silencer cavity. This application places the suction port in the housing assembly, which greatly reduces the size of the first silencer and the diameter of the corresponding sealing ring, thereby significantly improving the reliability of the seal.

Description

Technical Field

[0001] This application relates to the field of compressor technology, specifically to a rotary compressor and a cooling device including the rotary compressor. Background Technology

[0002] The core issue in improving existing rotary reciprocating aluminum-cased compressor technology is a high-capacity requirement: the compressor needs to operate at higher speeds under specific conditions to meet the demand for higher cooling capacity. Due to their compact structure and smaller internal space, high-speed horizontal compressors require higher oil supply capacity and need to provide an oil supply system that differs from the original high back pressure system, such as differential pressure oil supply or gear pump oil supply.

[0003] The differential pressure oil supply scheme has a simple structure and requires fewer new parts, but it involves sealing at high and low pressures, thus placing higher demands on the sealing between the high-pressure chamber and the low-pressure chamber.

[0004] In the process of realizing this invention, the inventors discovered at least the following problems in the prior art:

[0005] Because the intake port of the existing rotary compressor is located on the muffler, the size of the muffler has to be designed to be larger due to the constraint of the intake port. The problem with this technical solution is that the outer diameter sealing ring of the muffler is too large, resulting in unreliable sealing. Summary of the Invention

[0006] In order to effectively overcome the problems existing in the above-mentioned related technologies, the main purpose of this application is to provide a rotary compressor and cooling device that can improve sealing reliability.

[0007] To achieve the above objectives, this application specifically adopts the following technical solution:

[0008] This application provides a rotary compressor, the compressor comprising:

[0009] A housing assembly, wherein the housing assembly is provided with a mounting cavity, an air inlet, an air outlet, and an air intake;

[0010] A motor assembly, wherein the motor assembly is mounted at one end within the mounting cavity;

[0011] A pump body assembly, which is mounted at the other end of the mounting cavity;

[0012] The pump assembly includes a crankshaft, a cylinder, a main bearing, a secondary bearing, a first muffler, and a second muffler. The main bearing and the secondary bearing are spaced apart within the mounting cavity. The cylinder is installed between the main bearing and the secondary bearing and is connected to the intake port. The crankshaft passes through the main bearing and the secondary bearing, with one end connected to the motor assembly and the other end connected to the piston of the cylinder. The first muffler is sealed to the main bearing and the inner wall of the mounting cavity, forming a first muffler chamber. The first muffler separates the cavity containing the motor assembly from the cavity containing the pump assembly, forming a low-pressure cavity and a high-pressure cavity. The second muffler is connected to the secondary bearing, forming a second muffler chamber. This allows refrigerant to flow into the cylinder through the intake port, the low-pressure cavity, and the intake port, and after being compressed by the cylinder, it can flow through the first and second muffler chambers to the high-pressure cavity, and then be discharged through the outlet port.

[0013] In some embodiments, the main bearing is further provided with a first channel, and the cylinder body of the cylinder is provided with a first gas channel. The air inlet, the low-pressure chamber, the suction port, the first channel and the first gas channel are connected to form the air intake channel of the cylinder.

[0014] In some embodiments, the main bearing is further provided with a second channel and a third channel, the cylinder body is provided with a second gas channel, the auxiliary bearing is provided with a first exhaust channel and a second exhaust channel, the second muffler is provided with an exhaust port, the first exhaust channel, the second muffler cavity, the exhaust port, the high-pressure cavity and the exhaust port are connected to form the first exhaust channel of the cylinder; the second channel, the first muffler cavity, the third channel, the second gas channel, the second exhaust channel and the second muffler cavity are connected to form the second exhaust channel of the cylinder.

[0015] In some embodiments, the cylinder includes an upper cylinder, a lower cylinder, and a partition. The upper cylinder includes a first piston, and the lower cylinder includes a second piston. Both the upper cylinder and the lower cylinder are disposed between the main bearing and the auxiliary bearing. The partition is disposed between the upper cylinder and the lower cylinder. The first piston is disposed in the cavity of the upper cylinder and connected to the crankshaft. The second piston is disposed in the cavity of the lower cylinder and connected to the crankshaft. The cavities of the upper cylinder and the lower cylinder are respectively connected to the intake passage. The refrigerant compressed in the lower cylinder can be discharged through the first exhaust passage, and the refrigerant compressed in the upper cylinder can be discharged through the second exhaust passage.

[0016] In some embodiments, the pump body assembly further includes an oil separator and an oil drain pipe. The oil separator is installed in the mounting cavity, and the input end of the oil separator is connected to the exhaust port, the air outlet end of the oil separator is connected to the high-pressure chamber, and the oil outlet end of the oil separator is connected to the oil drain pipe.

[0017] In some embodiments, the housing assembly includes a frame, one end of the first muffler is sleeved on the main bearing and sealed to the main bearing, the other end of the first muffler is sealed to the frame, and the first muffler, the frame, and the main bearing form the first muffler cavity.

[0018] In some embodiments, the main bearing includes a first bearing body and a first neck, one end of the first bearing body is sleeved on the crankshaft, the other end of the first bearing body is connected to the frame, the first neck is connected to the first bearing body and extends toward the motor assembly, and the first muffler is sleeved on the first neck and sealed to the first neck.

[0019] In some embodiments, the secondary bearing includes a second bearing body and a second neck. The second bearing body is sleeved on the crankshaft, the second neck is connected to the second bearing body and extends in a direction away from the cylinder, and the second neck is sealed to the inner wall of the mounting cavity.

[0020] In some embodiments, one end of the second muffler is connected to the second neck, and the other end of the second muffler is connected to the second bearing body to form the second muffler cavity.

[0021] Accordingly, this application also provides a cooling device, including an evaporator, a condenser, a throttling element, and a rotary compressor as described in any of the above embodiments, wherein the evaporator, the condenser, the throttling element, and the compressor are connected by pipelines.

[0022] Compared with the prior art, the technical solution provided in this application has at least the following beneficial effects:

[0023] The compressor of this application includes a housing assembly, a motor assembly, and a pump assembly. The housing assembly has a mounting cavity, an inlet, an outlet, and a suction port. The motor assembly is mounted at one end of the mounting cavity, and the pump assembly is mounted at the other end of the mounting cavity. The pump assembly includes a crankshaft, a cylinder, a main bearing, a secondary bearing, a first muffler, and a second muffler. The main bearing and the secondary bearing are spaced apart within the mounting cavity. The cylinder is mounted between the main bearing and the secondary bearing. The crankshaft passes through the main bearing and the secondary bearing, and one end of the crankshaft is connected to the motor assembly. The crankshaft is connected to the piston of the cylinder at one end. The first muffler is sealed to the main bearing and the inner wall of the mounting cavity, forming a first muffler chamber. The first muffler separates the cavity containing the motor assembly from the cavity containing the pump assembly, forming a low-pressure chamber and a high-pressure chamber. The second muffler is connected to the auxiliary bearing, forming a second muffler chamber. The refrigerant can flow into the cylinder through the inlet, the low-pressure chamber, and the intake port. After being compressed by the cylinder, it can flow through the first and second muffler chambers to the high-pressure chamber, and then be discharged through the outlet. It can be seen that by opening the intake port in the housing assembly, the size of the first muffler is greatly reduced, and the diameter of the corresponding sealing ring is also greatly reduced, thereby greatly improving the reliability of the seal. Attached Figure Description

[0024] Figure 1 This is a front view of a rotary compressor provided in an embodiment of this application.

[0025] Figure 2 This is a cross-sectional view of a rotary compressor provided in an embodiment of this application.

[0026] Figure 3 for Figure 2 A partially enlarged view of a rotary compressor.

[0027] Figure 4 This is a schematic diagram of the main bearing provided in an embodiment of this application.

[0028] Figure 5 A cross-sectional view of the first muffler provided in an embodiment of this application.

[0029] Figure 6 A perspective view of the first muffler provided in an embodiment of this application.

[0030] Figure 7 An assembly cross-sectional view of the first muffler, housing assembly, and main bearing provided for embodiments of this application.

[0031] Attached image labels:

[0032] 1. Housing assembly; 11. Main housing base; 111. Air inlet; 112. Air outlet; 113. Air intake; 114. Frame; 12. Controller base; 13. Pump body end cover; 2. Motor assembly; 3. Pump body assembly; 31. Crankshaft; 32. Cylinder; 32a. First gas passage; 321. Upper cylinder; 321a. First piston; 322. Lower cylinder; 322a. Second piston; 323. Partition plate; 33. Main bearing; 331. First bearing body; 331a. First channel; 331b. Second channel; 331c. Third channel; 331d. Frame mounting hole; 331e. Muffler mounting hole; 332. First neck; 34. Secondary bearing; 341. Second bearing body; 341a. First air outlet passage; 342. Second neck; 35. First silencer; 351. Silencer body; 351a. First annular limiting groove; 351b. Second annular limiting groove; 352. Fixing post; 36. Second silencer; 101. First silencing chamber; 102. Second silencing chamber; 103. Low-pressure chamber; 104. High-pressure chamber. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0034] In the description of this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple" refers to two or more; the terms "connected," "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] In the description of this specification, it should be understood that the directional terms such as "upper" and "lower" used in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should also be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0036] Because the intake port of existing rotary compressors is located on the muffler, the size of the muffler has to be designed to be larger due to the constraint of the intake port. The problem with this technical solution is that the outer diameter sealing ring of the muffler is too large, resulting in unreliable sealing; the size of the intake port is limited by structural factors such as the position of the intake port, the size of the muffler, and the sealing.

[0037] Based on this, embodiments of this application disclose a rotary compressor and a cooling device to improve the aforementioned technical problems.

[0038] Reference Figure 1 and Figure 2 As shown, an embodiment of this application discloses a rotary compressor, which includes a housing assembly 1, a motor assembly 2, and a pump assembly 3. The housing assembly 1 has a mounting cavity, an inlet 111, and an outlet 112. The motor assembly 2 is installed at one end of the mounting cavity of the housing assembly 1, and the pump assembly 3 is installed at the other end of the mounting cavity of the housing assembly 1, and the pump assembly 3 is connected to the motor assembly 2 so that the motor assembly 2 can drive the pump assembly 3 to move. During operation, the motor assembly 2 drives the pump assembly 3 to move, causing external refrigerant to flow into the pump assembly 3 through the inlet 111, and after being compressed by the pump assembly 3, flow out through the outlet 112.

[0039] The housing assembly 1 includes a main housing base 11, a controller base 12, and a pump body end cover 13. The main housing base 11 is a cylindrical structure with openings at both ends. The controller base 12 is connected to one end of the main housing base 11, and the pump body end cover 13 is connected to the other end of the main housing base 11, forming an installation cavity. The main housing base 11 is provided with an air inlet 111 and an air outlet 112. The motor assembly 2 is installed in the installation cavity near the controller base 12, and the pump body assembly 3 is installed in the installation cavity near the pump body end cover 13. The cavity where the motor assembly 2 is located is separated from the cavity where the pump body assembly 3 is located, forming a low-pressure cavity 103 and a high-pressure cavity 104. The low-pressure cavity is located on the side where the motor assembly 2 is located, and the high-pressure cavity is located on the side where the pump body assembly 3 is located. Gas can flow in through the air inlet 111, and then flow through the low-pressure cavity, the pump body assembly 3, and the high-pressure cavity in sequence before flowing out through the air outlet 112.

[0040] The pump assembly 3 includes a crankshaft 31, a cylinder 32, a main bearing 33, a secondary bearing 34, a first muffler 35, and a second muffler 36. The main bearing 33 and the secondary bearing 34 are installed at intervals within the mounting cavity, with the main bearing 33 being closer to the motor assembly 2 than the secondary bearing 34. The cylinder 32 is installed between the main bearing 33 and the secondary bearing 34. The crankshaft 31 passes through the main bearing 33 and the secondary bearing 34, with one end of the crankshaft 31 connected to the motor assembly 2 and the other end connected to the piston of the cylinder 32. Thus, when the motor assembly 2 drives the crankshaft 31 to rotate, the crankshaft 31 can drive the piston of the cylinder 32 to rotate, thereby compressing the refrigerant. One end of the first muffler 35 is connected to the main bearing 33, and the other end of the first muffler 35 is connected to the inner wall of the mounting cavity, so that the mounting cavity is divided into a low-pressure cavity 103 and a high-pressure cavity 104 by the first muffler 35, and the first muffler 35, the inner wall of the mounting cavity and the main bearing 33 also enclose a first muffler cavity 101. The second muffler 36 is connected to the auxiliary bearing 34 to enclose a second muffler cavity 102. The high-pressure refrigerant compressed by the cylinder 32 can flow through the first muffler cavity 101 and the second muffler cavity 102 to the high-pressure cavity, and then be discharged from the outlet 112.

[0041] Reference Figure 3 and Figure 4As shown, the main housing 11 is provided with an intake port 113, and the cylinder 32 is connected to the intake port 113. The main bearing 33 is provided with a first channel 331a, a second channel 331b, and a third channel 331c. The cylinder body of the cylinder 32 is provided with a first gas channel 32a and a second gas channel. The auxiliary bearing 34 is provided with a first exhaust channel and a second exhaust channel. The second muffler 36 is provided with an exhaust port. The intake port 111, the low-pressure chamber, the intake port 113, the first channel 331a, and the first gas channel 32a are connected to form the intake channel of the cylinder 32. The first exhaust channel, the second muffler chamber 102, the exhaust port, the high-pressure chamber, and the exhaust port 112 are connected to form the first exhaust channel. The second channel 331b, the first muffler chamber 101, the third channel 331c, the second gas channel, the second exhaust channel, and the second muffler chamber 102 are connected to form the second exhaust channel of the cylinder 32. When the compressor is working, the refrigerant can flow into the cylinder 32 through the intake passage, and the high-pressure refrigerant compressed by the cylinder 32 can flow out through the first exhaust passage and the second exhaust passage. In this embodiment, the intake port 113 is located in the main housing 11 instead of the first silencer 35, so that the outer diameter of the first silencer 35 can be made smaller. It can be understood that the main housing 11 is provided with an intake port 111, an intake port 113, and an exhaust port 112, that is, the housing assembly 1 is provided with an intake port 111, an intake port 113, and an exhaust port 112, so that the refrigerant can flow into the pump body assembly 3 for compression and the compressed refrigerant can flow out of the housing assembly 1. More specifically, the refrigerant can flow into the cylinder 32 through the intake port 111, the low-pressure chamber 103 and the intake port 113, and after being compressed by the cylinder 32, it can flow through the first silencer chamber 101 and the second silencer chamber 102 to the high-pressure chamber 104, and then be discharged through the exhaust port 112.

[0042] During operation, the gaseous refrigerant can flow into the low-pressure chamber through the air inlet 111, then flow through the air intake 113 and the first channel 331a before flowing into the cylinder 32 chamber (cylinder body). After being compressed by the piston of the cylinder 32, it becomes a high-temperature and high-pressure gaseous refrigerant. Part of the high-temperature and high-pressure gaseous refrigerant is discharged through the first exhaust channel, and part of the high-temperature and high-pressure gaseous refrigerant is discharged through the second exhaust channel.

[0043] Continue to refer to Figure 3As shown, the inner wall of the main housing 11 extends out to form a frame 114. The main bearing 33 includes a first bearing body 331 and a first neck 332. One end of the first bearing body 331 is fitted onto the crankshaft 31, and the other end of the first bearing body 331 is connected to the frame 114. The first neck 332 is connected to the first bearing body 331 and extends toward the motor assembly 2. One end of the first muffler 35 is fitted onto the first neck 332 and is sealed to the first neck 332. The other end of the first muffler 35 is sealed to the frame 114, so that the mounting cavity is divided into a low-pressure cavity 103 and a high-pressure cavity 104 by the first muffler 35, and the first muffler 35, the frame 114 and the main bearing 33 form a first muffler cavity 101. The auxiliary bearing 34 includes a second bearing body 341 and a second neck 342. The second bearing body 341 is sleeved on the crankshaft 31, and the second neck 342 is connected to the second bearing body 341 and extends in the direction away from the cylinder 32. The second neck 342 is sealed to the inner wall of the pump body end cover plate 13. One end of the second silencer 36 is sleeved on the second neck 342, and the other end of the second silencer 36 is connected to the second bearing body 341, forming a second silencer cavity 102. In this embodiment, by sealing the first silencer 35 with the main bearing 33 and the frame 114, and sealing the auxiliary bearing 34 with the pump body end cover plate 13, leakage between the low-pressure chamber and the high-pressure chamber is effectively blocked, thereby successfully establishing the low-pressure chamber and the high-pressure chamber in the compressor. At the same time, the structure of this embodiment not only allows the compressor controller to be arranged on the motor side, making the compressor structure more compact and the appearance simpler, but also allows the differential pressure of the differential pressure oil supply method to be established normally, effectively ensuring that the compressor using differential pressure oil supply can supply oil normally.

[0044] Reference Figure 5As shown, to improve the sealing performance of the connection between the first silencer 35 and the main bearing 33 and the frame 114, and the sealing performance of the connection between the auxiliary bearing 34 and the pump body end cover plate 13, the pump body assembly 3 also includes a first sealing ring, a second sealing ring, and a third sealing ring. One end of the first silencer 35 is provided with a first annular limiting groove 351a, and the other end is provided with a second annular limiting groove 351b. The first sealing ring is disposed within the first annular limiting groove 351a and is in close contact with the first neck 332, thereby sealing the first silencer 35 with the main bearing 33 and effectively cutting off leakage from the first silencing chamber 101 to the low-pressure chamber. The second sealing ring is disposed within the second annular limiting groove 351b and is tightly connected to the frame 114. The third sealing ring is disposed at the connection between the auxiliary bearing 34 and the pump body end cover plate 13. It is understood that the first, second, and third sealing rings can be O-rings. This embodiment effectively improves the sealing performance between the first silencer 35 and the main bearing 33 by assembling a first sealing ring on the inner end side of the first silencer 35, and effectively improves the sealing performance between the first silencer 35 and the frame 114 by assembling a second sealing ring on the outer end side of the first silencer 35. This effectively blocks leakage between the first silencer chamber 101 and the low-pressure chamber on the motor side, and blocks leakage between the high-pressure chamber on the pump side and the low-pressure chamber on the motor side. This effectively improves the leakage problem inside the rotary piston high and low back pressure compressor, forming a low-temperature low-pressure side region and a high-temperature high-pressure side region. At the same time, the sealing achieved by using O-rings and annular limiting grooves is not only more reliable, but also simpler and more feasible to install, without changing the compressor assembly process. In addition, the design of moving the suction port 113 outward allows the compressor to be made smaller.

[0045] Continue to refer to Figure 4 As shown, the first bearing body 331 is provided with multiple frame mounting holes 331d and multiple muffler mounting holes 331e. The multiple frame mounting holes 331d are evenly distributed along the circumferential direction of the first bearing body 331 on its outer circumferential side, and the multiple muffler mounting holes 331e are evenly distributed along the circumferential direction of the first bearing body 331 on its inner circumferential side. During assembly, the main bearing 33 can be fixed to the frame 114 through the multiple frame mounting holes 331e.

[0046] Reference Figure 6 and Figure 7As shown, the first muffler 35 includes a muffler body 351 and a plurality of fixing posts 352. The plurality of fixing posts 352 are evenly distributed around the muffler body 351 at intervals along the circumference of the muffler body 351, and the positions and sizes of the plurality of fixing posts 352 correspond to the positions and sizes of the plurality of muffler fixing holes 331e. In this embodiment, there are three fixing posts 352. The first muffler 35 can be fixed to the main bearing 33 by the fixing posts 352 and the muffler fixing holes 331e.

[0047] Continue to refer to Figure 3 As shown, cylinder 32 includes an upper cylinder 321, a lower cylinder 322, and a partition 323. Upper cylinder 321 includes a first piston 321a, and lower cylinder 322 includes a second piston 322a. Upper cylinder 321 and lower cylinder 322 are disposed between the main bearing 33 and the auxiliary bearing 34, with upper cylinder 321 being closer to the main bearing 33 than lower cylinder 322. Partition 323 is disposed between upper cylinder 321 and lower cylinder 322 and has a vent. First piston 321a is disposed within the cavity of upper cylinder 321 and connected to crankshaft 31, and second piston 322a is disposed within the cavity of lower cylinder 322 and connected to crankshaft 31. The upper cylinder 321 is connected to the intake passage, and the lower cylinder 322 is connected to the intake passage through the vent of the partition 323. The refrigerant compressed in the upper cylinder 321 can be discharged through the second exhaust passage, and the refrigerant compressed in the lower cylinder 322 can be discharged through the first exhaust passage.

[0048] The pump body assembly 3 also includes an oil separator and an oil drain pipe. The oil separator is installed in the mounting cavity, and the input end of the oil separator is connected to the exhaust port of the second silencer 36. The gas outlet end of the oil separator is connected to the high-pressure chamber, and the oil outlet part of the oil separator is connected to the oil drain pipe. Thus, the compressed refrigerant is first separated into oil and gas and then discharged through the oil separator.

[0049] This application applies to compressors with a high and low back pressure structure design. In a high and low back pressure compressor, the pump body draws in air through the main bearing 33, distributing it to the upper cylinder 321 and the lower cylinder 322. After compression, the refrigerant is discharged from the pump body side. Specifically, the refrigerant compressed by the upper cylinder 321 flows through the second exhaust channel to the second silencer chamber 102. After merging with the refrigerant compressed by the lower cylinder 322 in the second silencer chamber 102, it undergoes oil-gas separation through an oil separator connected to the auxiliary bearing 34 before being discharged from the upper end of the pump body cavity. At this time, the motor cavity is a low-pressure area, while the pump body cavity and the silencer belong to the high-pressure exhaust area. The sealing effect of the first silencer can block the high and low pressure crossflow between the motor-side cavity and the pump-side cavity, and between the motor-side cavity and the first silencer chamber, thus establishing the high and low back pressure areas and enabling the compressor with this high back pressure structure to operate successfully. Compared to traditional silencers and previous... The innovations and advantages of this invention's silencer are as follows: ① Due to the outward relocation of the intake port, i.e., the intake port is located within the housing assembly, the size of the first silencer is significantly reduced compared to existing main bearing silencers, and the diameter of the sealing ring is also greatly reduced, which will greatly improve the reliability of the seal; ② The outward relocation of the intake port means that the size of the intake port is no longer constrained by the O-ring groove design and the outer diameter of the housing, increasing the design margin. The compressor's intake port can be designed to be larger, meaning it has greater potential for large displacement; ③ Traditional silencers have a ring-shaped silencing cavity, while the silencer in this design has an arc-shaped silencing cavity, providing a new approach to the structure of the silencer cavity. Furthermore, the silencer is installed on the main bearing of the pump body, and the compressor is assembled by fitting it into the main housing using a bevel gauge. This process is basically consistent with existing mass production line procedures, eliminating the need for additional production steps and reducing manufacturing costs.

[0050] Accordingly, embodiments of this application also disclose a cooling device, which includes an evaporator, a condenser, a throttling element, and a compressor as described in any of the above embodiments, wherein the evaporator, the condenser, the throttling element, and the compressor are connected by pipelines.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A rotary compressor, characterized in that, include: A housing assembly, wherein the housing assembly is provided with a mounting cavity, an air inlet, an air outlet, and an air intake; A motor assembly, wherein the motor assembly is mounted at one end within the mounting cavity; A pump body assembly, which is mounted at the other end of the mounting cavity; The pump assembly includes a crankshaft, a cylinder, a main bearing, a secondary bearing, a first muffler, and a second muffler. The main bearing and the secondary bearing are spaced apart within the mounting cavity. The cylinder is installed between the main bearing and the secondary bearing and is connected to the intake port. The crankshaft passes through the main bearing and the secondary bearing, with one end connected to the motor assembly and the other end connected to the piston of the cylinder. The first muffler is sealed to the main bearing and the inner wall of the mounting cavity, forming a first muffler chamber. The first muffler separates the cavity containing the motor assembly from the cavity containing the pump assembly, forming a low-pressure cavity and a high-pressure cavity. The second muffler is connected to the secondary bearing, forming a second muffler chamber. This allows refrigerant to flow into the cylinder through the intake port, the low-pressure cavity, and the intake port, and after being compressed by the cylinder, it can flow through the first and second muffler chambers to the high-pressure cavity, and then be discharged from the outlet port. The housing assembly includes a main housing base, the inner wall of which extends out of the frame. One end of the first muffler is fitted onto the main bearing and is sealed to the main bearing. The other end of the first muffler is sealed to the frame. The first muffler, the frame, and the main bearing together form the first muffler cavity.

2. The rotary compressor according to claim 1, characterized in that, The main bearing is also provided with a first channel, and the cylinder body of the cylinder is provided with a first gas channel. The air inlet, the low-pressure chamber, the air intake, the first channel and the first gas channel are connected to form the air intake channel of the cylinder.

3. The rotary compressor according to claim 2, characterized in that, The main bearing is also provided with a second channel and a third channel, the cylinder body is provided with a second gas channel, the auxiliary bearing is provided with a first gas outlet channel and a second gas outlet channel, the second muffler is provided with an exhaust port, and the first gas outlet channel, the second muffler chamber, the exhaust port, the high-pressure chamber and the exhaust port are connected to form the first exhaust channel of the cylinder; The second channel, the first silencer cavity, the third channel, the second gas channel, the second exhaust channel, and the second silencer cavity are connected to form the second exhaust channel of the cylinder.

4. The rotary compressor according to claim 3, characterized in that, The cylinder includes an upper cylinder, a lower cylinder, and a partition. The upper cylinder includes a first piston, and the lower cylinder includes a second piston. Both the upper and lower cylinders are disposed between the main bearing and the auxiliary bearing. The partition is disposed between the upper and lower cylinders. The first piston is disposed in the cavity of the upper cylinder and connected to the crankshaft. The second piston is disposed in the cavity of the lower cylinder and connected to the crankshaft. The cavities of the upper and lower cylinders are respectively connected to the intake passage. The refrigerant compressed in the lower cylinder can be discharged through the first exhaust passage, and the refrigerant compressed in the upper cylinder can be discharged through the second exhaust passage.

5. The rotary compressor according to claim 3, characterized in that, The pump assembly also includes an oil separator and an oil drain pipe. The oil separator is installed in the mounting cavity, and the input end of the oil separator is connected to the exhaust port, the air outlet end of the oil separator is connected to the high-pressure chamber, and the oil outlet end of the oil separator is connected to the oil drain pipe.

6. The rotary compressor according to claim 1, characterized in that, The main bearing includes a first bearing body and a first neck. One end of the first bearing body is sleeved on the crankshaft, and the other end of the first bearing body is connected to the frame. The first neck is connected to the first bearing body and extends toward the motor assembly. The first muffler is sleeved on the first neck and is sealed to the first neck.

7. The rotary compressor according to claim 1, characterized in that, The auxiliary bearing includes a second bearing body and a second neck. The second bearing body is sleeved on the crankshaft, and the second neck is connected to the second bearing body and extends in a direction away from the cylinder. The second neck is sealed to the inner wall of the mounting cavity.

8. The rotary compressor according to claim 7, characterized in that, One end of the second muffler is connected to the second neck, and the other end of the second muffler is connected to the second bearing body to form the second muffler cavity.

9. A cooling device, characterized in that, It includes an evaporator, a condenser, a throttling element, and a rotary compressor as described in any one of claims 1 to 8, wherein the evaporator, the condenser, the throttling element, and the rotary compressor are connected by a pipeline.

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