Rotary compressor and cooling equipment

Abstract

The rotary compressor comprises a shell assembly, a motor assembly and a pump body assembly, the shell assembly is provided with a mounting cavity, an air inlet, an air outlet and an air suction port, and the motor assembly and the pump body assembly are mounted at the two ends in the mounting cavity correspondingly; the pump body assembly comprises a crankshaft, an air cylinder, a main bearing, an auxiliary bearing, a first silencer and a second silencer, the air cylinder communicates with the air suction port, one end of the crankshaft is connected with the motor assembly, the other end of the crankshaft is connected with a piston of the air cylinder, and the first silencer is in sealed connection with the main bearing and the inner wall of the mounting cavity to define a first silencing cavity; a cavity where the motor assembly is located and a cavity where the pump body assembly is located are separated by the first silencer to form a low-pressure cavity and a high-pressure cavity; the second silencer is connected with the auxiliary bearing to define a second silencing cavity. The air suction port is formed in the shell assembly, so that the size of the first silencer is greatly reduced, the diameter of the corresponding sealing ring is also greatly reduced, and therefore the sealing reliability is greatly improved.

Description

Technical Field

[0001] The present application relates to the technical field of compressors, and in particular to a rotary compressor and a cooling device including the rotary compressor. Background Art

[0002] The core issue of the existing rotary piston aluminum shell compressor technology improvement is a high capacity demand. It is hoped that the compressor can have a higher speed under certain circumstances to meet the demand for higher refrigeration capacity. The horizontal compressor at high speed has a compact structure and a small internal space, so the compressor oil supply capacity is required to be higher. It is necessary to provide an oil supply system different from the original high back pressure, such as differential pressure oil supply, gear pump oil supply, etc.

[0003] Among them, the pressure differential oil supply solution has a simple structure and fewer new parts, but it involves high and low pressure sealing, so there are higher requirements for the sealing between the high-pressure chamber and the low-pressure chamber.

[0004] In the process of implementing the present invention, the inventors found that the prior art has at least the following problems: Since the air intake of the existing rotary compressor is arranged on the muffler, the size of the muffler is constrained by the air intake and has to be designed to be larger. The problem with this technical solution is that the outer diameter sealing ring of the muffler is too large and the sealing is unreliable. Summary of the invention

[0005] In order to effectively overcome the problems existing in the above-mentioned related technologies, the main purpose of the present application is to provide a rotary compressor and cooling equipment that can improve the sealing reliability.

[0006] In order to achieve the above objectives, this application specifically adopts the following technical solutions: The present application provides a rotary compressor, the compressor comprising: A housing assembly, wherein the housing assembly is provided with a mounting cavity, an air inlet, an air outlet and an air suction port; A motor assembly, the motor assembly being installed at one end of the installation cavity; A pump body assembly, the pump body assembly being installed at the other end of the installation cavity; The pump body 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 installed in the installation cavity at intervals. The cylinder is installed between the main bearing and the secondary bearing, and the cylinder is connected to the air intake port. The crankshaft is passed through the main bearing and the secondary bearing, and 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 muffler is sealed and connected to the main bearing and the inner wall of the installation cavity to enclose a first muffler cavity, and the first muffler separates the cavity where the motor assembly is located from the cavity where the pump body assembly is located to form a low-pressure cavity and a high-pressure cavity; the second muffler is connected to the secondary bearing to enclose a second muffler cavity; so that the refrigerant can flow into the cylinder through the air inlet, the low-pressure cavity and the air intake port, and after being compressed by the cylinder, it can flow to the high-pressure cavity through the first muffler cavity and the second muffler cavity, and then be discharged from the air outlet.

[0007] In some embodiments, the main bearing is also provided with a first channel, 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 constitute the air inlet channel of the cylinder.

[0008] In some embodiments, the main bearing is also provided with a second channel and a third channel, the cylinder body of the cylinder is provided with a second gas channel, the secondary bearing is provided with a first air outlet channel and a second air outlet channel, the second muffler is provided with an exhaust port, the first air outlet channel, the second muffler chamber, the exhaust port, the high-pressure chamber and the air outlet are connected to form the first exhaust channel of the cylinder; the second channel, the first muffler chamber, the third channel, the second gas channel, the second air outlet channel and the second muffler chamber are connected to form the second exhaust channel of the cylinder.

[0009] In some embodiments, the cylinder includes an upper cylinder, a lower cylinder and a partition, the upper cylinder includes a first piston, the lower cylinder includes a second piston, the upper cylinder and the lower cylinder are both arranged between the main bearing and the secondary bearing, the partition is arranged between the upper cylinder and the lower cylinder, the first piston is arranged in the cavity of the upper cylinder and connected to the crankshaft, the second piston is arranged 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 channel, the refrigerant compressed in the lower cylinder can be discharged through the first exhaust channel, and the refrigerant compressed in the upper cylinder can be discharged through the second exhaust channel.

[0010] In some embodiments, the pump body assembly also includes an oil separator and an oil drain pipe, the oil separator is installed in the installation 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 cavity, and the oil outlet end of the oil separator is connected to the oil drain pipe.

[0011] In some embodiments, the shell assembly includes a frame, one end of the first muffler is sleeved on the main bearing and sealed with the main bearing, the other end of the first muffler is sealed with the frame, and the first muffler, the frame and the main bearing enclose the first muffler chamber.

[0012] 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 direction of the motor assembly, and the first muffler is sleeved on the first neck and sealed with the first neck.

[0013] 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 and connected to the inner wall of the mounting cavity.

[0014] 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 chamber.

[0015] Correspondingly, the present 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 a pipeline.

[0016] Compared with the prior art, the technical solution provided by this application has at least the following beneficial effects: The compressor of the present application comprises a housing assembly, a motor assembly and a pump assembly, wherein the housing assembly is provided with an installation cavity, an air inlet, an air outlet and an air suction port, the motor assembly is installed at one end in the installation cavity, and the pump assembly is installed at the other end in the installation cavity, wherein the pump assembly comprises 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 installed in the installation cavity at intervals, the cylinder is installed between the main bearing and the secondary bearing, the crankshaft is passed through the main bearing and the secondary bearing, and one end of the crankshaft is connected to the motor assembly The first muffler is connected to the main bearing and the inner wall of the mounting cavity, and the first muffler is sealed and connected to the main bearing and the inner wall of the mounting cavity to form a first muffler cavity. The first muffler separates the cavity where the motor assembly is located from the cavity where the pump assembly is located to form a low-pressure cavity and a high-pressure cavity. The second muffler is connected to the auxiliary bearing to form a second muffler cavity. The refrigerant can flow into the cylinder through the air inlet, the low-pressure cavity and the air intake port, and after being compressed by the cylinder, it can flow to the high-pressure cavity through the first muffler cavity and the second muffler cavity, and then be discharged from the air outlet. It can be seen that the present application greatly reduces the size of the first muffler by opening the air intake port in the housing assembly, and the diameter of the corresponding sealing ring is also greatly reduced, thereby greatly improving the reliability of the seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A front view of a rotary compressor provided in an embodiment of the present application.

[0018] Figure 2 A cross-sectional view of a rotary compressor provided in an embodiment of the present application.

[0019] Figure 3 for Figure 2 A partial enlarged view of the rotary compressor.

[0020] Figure 4 A schematic diagram of the structure of the main bearing provided in an embodiment of the present application.

[0021] Figure 5 A cross-sectional view of the first muffler provided in an embodiment of the present application.

[0022] Figure 6 A three-dimensional diagram of the first muffler provided in an embodiment of the present application.

[0023] Figure 7 This is an assembly cross-sectional view of the first muffler, housing assembly and main bearing provided in an embodiment of the present application.

[0024] Figure ID: 1. Shell assembly; 11. Main shell seat; 111. Air inlet; 112. Air outlet; 113. Air intake; 114. Frame; 12. Controller seat; 13. Pump body end cover; 2. Motor assembly; 3. Pump body assembly; 31. Crankshaft; 32. Cylinder; 32a. First gas channel; 321. Upper cylinder; 321a. First piston; 322. Lower cylinder; 322a. Second piston; 323. Partition; 33. Main bearing; 331. First bearing body; 331a. First channel; 331b. Second channel; 331c. Third channel; 331d. Frame fixing hole; 331e. Muffler fixing hole; 332. First neck; 34. Secondary bearing; 341. Second bearing body; 341a. First air outlet channel; 342, second neck; 35, first muffler; 351, muffler body; 351a, first annular limiting groove; 351b, second annular limiting groove; 352, fixing column; 36, second muffler; 101, first muffler chamber; 102, second muffler chamber; 103, low-pressure chamber; 104, high-pressure chamber. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0026] In the description of this application, unless otherwise clearly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; unless otherwise specified or explained, the term "plurality" refers to two or more; the terms "connected" and "fixed" should be understood in a broad sense, for example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] In the description of this specification, it should be understood that the directional words such as "upper" and "lower" described in the embodiments of the present application are described at the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it should also be understood that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element.

[0028] Since the air intake of the existing rotary compressor is arranged on the muffler, the size of the muffler is constrained by the air intake port and has to be designed to be larger. The problem with this technical solution is that the outer diameter sealing ring of the muffler is too large and the sealing is unreliable; the size of the air intake port is affected by structural factors such as the air intake port position, the muffler size and the seal, and the size is limited.

[0029] Based on this, an embodiment of the present application discloses a rotary compressor and a cooling device to improve the above-mentioned technical problems.

[0030] Reference Figure 1 and Figure 2 As shown, an embodiment of the present application discloses a rotary compressor, which includes a housing assembly 1, a motor assembly 2 and a pump assembly 3, wherein the housing assembly 1 is provided with a mounting cavity, an air inlet 111 and an air outlet 112. The motor assembly 2 is mounted at one end of the mounting cavity of the housing assembly 1, and the pump assembly 3 is mounted 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, so that the external refrigerant flows into the pump assembly 3 through the air inlet 111, and flows out from the air outlet 112 after being compressed by the pump assembly 3.

[0031] The housing assembly 1 includes a main housing seat 11, a controller seat 12 and a pump body end cover plate 13. The main housing seat 11 is set as a cylindrical structure with two ends open. The controller seat 12 is connected to one end of the main housing seat 11, and the pump body end cover plate 13 is connected to the other end of the main housing seat 11 to enclose a mounting cavity, and the main housing seat 11 is provided with an air inlet 111 and an air outlet 112. The motor assembly 2 is installed at one end of the mounting cavity close to the controller seat 12, and the pump body assembly 3 is installed at one end of the mounting cavity close to the pump body end cover plate 13, and 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 from the air inlet 111, and then flow through the low-pressure cavity, the pump body assembly 3, and the high-pressure cavity in turn, and then flow out from the air outlet 112.

[0032] The pump body 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 in the installation cavity at intervals, and the main bearing 33 is 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, and the crankshaft 31 is inserted through the main bearing 33 and the secondary bearing 34. One end of the crankshaft 31 is connected to the motor assembly 2, and the other end of the crankshaft 31 is connected to the piston of the cylinder 32, so that when the motor assembly 2 drives the crankshaft 31 to rotate, the crankshaft 31 can drive the piston of the cylinder 32 to rotate to achieve compression of 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 installation cavity, so that the installation cavity is divided into a low-pressure cavity 103 and a high-pressure cavity 104 through the first muffler 35, and the first muffler 35, the inner wall of the installation cavity and the main bearing 33 also enclose the first muffler cavity 101. The second muffler 36 is connected to the auxiliary bearing 34 to enclose the second muffler cavity 102, and the high-pressure refrigerant compressed by the cylinder 32 can flow to the high-pressure cavity through the first muffler cavity 101 and the second muffler cavity 102, and then discharged from the outlet 112.

[0033] Reference Figure 3 and Figure 4As shown, the main housing seat 11 is provided with an air intake port 113, and the cylinder 32 is connected with the air 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 gas outlet channel and a second gas outlet channel, the second muffler 36 is provided with an exhaust port, the air intake port 111, the low-pressure chamber, the air intake port 113, the first channel 331a and the first gas channel 32a are connected to form the air intake channel of the cylinder 32; the first gas outlet channel, the second muffler chamber 102, the exhaust port, the high-pressure chamber and the air outlet 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 gas outlet 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 from the air inlet passage, and the high-pressure refrigerant compressed by the cylinder 32 can flow out from the first exhaust passage and the second exhaust passage. In this embodiment, the air inlet 113 is opened in the main housing seat 11 instead of the first muffler 35, so that the outer diameter of the first muffler 35 can be made smaller. It can be understood that the main housing seat 11 is provided with an air inlet 111, an air inlet 113, and an air outlet 112, that is, the housing assembly 1 is provided with an air inlet 111, an air inlet 113, and an air outlet 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 air inlet 111, the low-pressure chamber 103 and the air inlet 113, and after being compressed by the cylinder 32, it can flow to the high-pressure chamber 104 through the first muffler chamber 101 and the second muffler chamber 102, and then be discharged from the air outlet 112.

[0034] During operation, the gaseous refrigerant can flow into the low-pressure chamber from the air inlet 111, and then flow into the cavity (cylinder body) of the cylinder 32 after passing through the air intake port 113 and the first channel 331a. After being compressed by the piston of the cylinder 32, it becomes a high-temperature and high-pressure gaseous refrigerant, among which 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.

[0035] Continue to refer to Figure 3As shown, the inner wall of the main housing seat 11 extends out of the 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 sleeved on 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 direction of the motor assembly 2. One end of the first muffler 35 is sleeved on the first neck 332 and is sealed with the first neck 332. The other end of the first muffler 35 is sealed with the frame 114, so that the installation 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 enclose the 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. The second neck 342 is connected to the second bearing body 341 and extends in a direction away from the cylinder 32. The second neck 342 is sealed and connected to the inner wall of the pump body end cover 13. One end of the second muffler 36 is sleeved on the second neck 342, and the other end of the second muffler 36 is connected to the second bearing body 341 to enclose a second muffler chamber 102. In this embodiment, the first muffler 35 is sealed and connected to the main bearing 33 and the frame 114, and the auxiliary bearing 34 is sealed and connected to the pump body end cover 13, thereby effectively blocking the leakage between the low-pressure chamber and the high-pressure chamber, and then successfully establishing the low-pressure chamber and the high-pressure chamber in the compressor. At the same time, the structure of this embodiment can not only arrange the controller of the compressor on the motor side, making the structure of the compressor more compact and the appearance more concise, but also enable the pressure difference of the oiling method of differential pressure oil supply to be established normally, effectively ensuring that the compressor using differential pressure oil supply can be normally supplied with oil.

[0036] Reference Figure 5As shown, in order to improve the sealing performance of the connection between the first muffler 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 muffler 35 is provided with a first annular limiting groove 351a, and the other end of the first muffler 35 is provided with a second annular limiting groove 351b. The first sealing ring is arranged in the first annular limiting groove 351a, and the first sealing ring is in close contact with the first neck 332, so that the first muffler 35 is sealed and connected with the main bearing 33, thereby effectively cutting off the leakage of the first muffler chamber 101 to the low-pressure chamber. The second sealing ring is arranged in the second annular limiting groove 351b, and the second sealing ring is closely connected with the frame 114. The third sealing ring is arranged at the connection between the auxiliary bearing 34 and the pump body end cover plate 13. It can be understood that the first sealing ring, the second sealing ring and the third sealing ring can be O-rings. In this embodiment, a first sealing ring is installed on the inner end side of the first muffler 35, thereby effectively improving the sealing performance between the first muffler 35 and the main bearing 33, and a second sealing ring is installed on the outer end side of the first muffler 35, thereby effectively improving the sealing performance between the first muffler chamber 101 and the low-pressure chamber on the motor side and the leakage between the high-pressure chamber on the pump body side and the low-pressure chamber on the motor side. The leakage problem inside the rotary piston type high and low back pressure compressor is effectively improved, and a low-temperature low-pressure side area and a high-temperature high-pressure side area are formed. At the same time, the use of O-rings and annular limit grooves to achieve sealing is not only more reliable, but also the installation of this structure is simpler and more feasible, and the process flow of compressor assembly is not changed. At the same time, the design of moving the air intake port 113 outward allows the volume of the compressor to be smaller.

[0037] Continue to refer to Figure 4 As shown, the first bearing body 331 is provided with a plurality of frame fixing holes 331d and a plurality of muffler fixing holes 331e, the plurality of frame fixing holes 331d are evenly distributed on the outer peripheral side of the first bearing body 331 along the circumferential direction of the first bearing body 331, and the plurality of muffler fixing holes 331e are evenly distributed on the inner peripheral side of the first bearing body 331 along the circumferential direction of the first bearing body 331. During assembly, the main bearing 33 can be fixed to the frame 114 through the plurality of frame fixing holes 331e.

[0038] Reference Figure 6 and Figure 7As shown, the first muffler 35 includes a muffler body 351 and a plurality of fixing columns 352. The plurality of fixing columns 352 are evenly distributed on the muffler body 351 along the circumferential direction of the muffler body 351, and the positions and sizes of the plurality of fixing columns 352 are arranged corresponding to the positions and sizes of the plurality of muffler fixing holes 331e. In this embodiment, three fixing columns 352 are provided. The first muffler 35 can be fixed to the main bearing 33 through the fixing columns 352 and the muffler fixing holes 331e.

[0039] Continue to refer to Figure 3 As shown, the cylinder 32 includes an upper cylinder 321, a lower cylinder 322 and a partition 323. The upper cylinder 321 includes a first piston 321a, and the lower cylinder 322 includes a second piston 322a. The upper cylinder 321 and the lower cylinder 322 are arranged between the main bearing 33 and the secondary bearing 34, and the upper cylinder 321 is closer to the main bearing 33 than the lower cylinder 322. The partition 323 is arranged between the upper cylinder 321 and the lower cylinder 322, and the partition 323 is provided with a vent. The first piston 321a is arranged in the cavity of the upper cylinder 321 and connected to the crankshaft 31, and the second piston 322a is arranged in the cavity of the lower cylinder 322 and connected to the crankshaft 31. The upper cylinder 321 is connected to the air intake passage, and the lower cylinder 322 is connected to the air intake passage through the air 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.

[0040] The pump body assembly 3 also includes an oil separator and an oil drain pipe. The oil separator is installed in the installation cavity, and the input end of the oil separator is connected to the exhaust port of the second muffler 36, the air outlet end of the oil separator is connected to the high-pressure cavity, and the oil outlet part of the oil separator is connected to the oil drain pipe, so that the compressed refrigerant is separated from the oil and gas through the oil separator before being discharged.

[0041] The present application is applicable to compressors with a high-low back-pressure structure design. The compressor pump body with a high-low back-pressure structure inhales air through the main bearing 33 and distributes it to the upper cylinder 321 and the lower cylinder 322. After compression, the refrigerant is exhausted on the pump body side. Specifically, the refrigerant compressed by the upper cylinder 321 flows to the second silencer chamber 102 through the second exhaust channel. After merging with the refrigerant compressed by the lower cylinder 322 in the second silencer chamber 102, it is separated from the oil and gas by the oil separator connected to the auxiliary bearing 34 and then discharged from the upper end of the pump body cavity. At this time, the motor cavity is a low-pressure area, and the pump body cavity and the muffler belong to the exhaust high-pressure area. The sealing effect of the first muffler can block the high and low pressure cross-flow between the motor side cavity and the pump body side cavity, and between the motor side cavity and the first muffler cavity, thereby achieving the establishment of high and low back pressure areas, so that compressors with a high back pressure structure can operate successfully; compared with traditional mufflers and previous The innovations and advantages of the silencer of this invention are as follows: ① Due to the outward displacement of the air intake port, that is, the air intake port is opened in the shell assembly, compared with the existing main bearing silencer, the size of the first silencer is greatly reduced, and the diameter of the sealing ring is reduced a lot, which will greatly improve the reliability of the seal; ② The outward displacement of the air intake port makes the size of the air intake port no longer constrained by the O-ring sink groove design and the outer diameter of the shell, increasing the design margin, and the air intake port of the compressor can be designed to be larger, which means that it has more potential for large displacement; ③ The traditional silencer silencer cavity is an annular structure, while the silencer silencer cavity of this design is arc-shaped, providing new ideas for the structure of the silencer cavity. In addition, the silencer is installed on the main bearing of the pump body, and the assembly of the compressor is realized by inserting the umbrella-shaped gauge into the main shell, which is basically consistent with the existing mass production line process, and does not require additional production processes, reducing manufacturing costs.

[0042] Correspondingly, an embodiment of the present application also discloses a cooling device, which includes an evaporator, a condenser, a throttling element and a compressor as described in any of the above embodiments, and the evaporator, the condenser, the throttling element and the compressor are connected by a pipeline.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application is described in detail with reference to the above embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present 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 suction port; A motor assembly, the motor assembly being installed at one end of the installation cavity; A pump body assembly, the pump body assembly being installed at the other end of the installation cavity; Wherein, the pump body 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 installed in the installation cavity at intervals, the cylinder is installed between the main bearing and the secondary bearing, and the cylinder is communicated with the air intake port, the crankshaft is passed through the main bearing and the secondary bearing, and 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 muffler is sealed and connected to the main bearing and the inner wall of the installation cavity to enclose a first muffler cavity, and the first muffler separates the cavity where the motor assembly is located from the cavity where the pump body assembly is located to form a low-pressure cavity and a high-pressure cavity; the second muffler is connected to the secondary bearing to enclose a second muffler cavity; So that the refrigerant can flow into the cylinder through the air inlet, the low-pressure chamber and the air intake, and after being compressed by the cylinder, it can flow to the high-pressure chamber through the first muffler chamber and the second muffler chamber, and then be discharged from the air outlet.

2. The rotary compressor according to claim 1, characterized in that: The main bearing is also provided with a first channel, the cylinder body of the cylinder is provided with a first gas channel, the air inlet, the low-pressure chamber, the air suction port, the first channel and the first gas channel are connected to form the air inlet 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 of the cylinder 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, the first gas outlet channel, the second muffler chamber, the exhaust port, the high pressure chamber and the gas outlet are connected to form a first exhaust channel of the cylinder; The second channel, the first muffler chamber, the third channel, the second gas channel, the second gas outlet channel and the second muffler chamber are connected to form a 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, the lower cylinder includes a second piston, the upper cylinder and the lower cylinder are both arranged between the main bearing and the secondary bearing, the partition is arranged between the upper cylinder and the lower cylinder, the first piston is arranged in the cavity of the upper cylinder and connected to the crankshaft, the second piston is arranged 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 channel, the refrigerant compressed in the lower cylinder can be discharged through the first exhaust channel, and the refrigerant compressed in the upper cylinder can be discharged through the second exhaust channel.

5. The rotary compressor according to claim 3, characterized in that: The pump body assembly also includes an oil separator and an oil drain pipe. The oil separator is installed in the installation 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 cavity, 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 housing assembly includes a frame, one end of the first muffler is sleeved on the main bearing and sealed with the main bearing, the other end of the first muffler is sealed with the frame, and the first muffler, the frame and the main bearing enclose the first muffler chamber.

7. The rotary compressor according to claim 6, 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, 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 direction of the motor assembly, and the first muffler is sleeved on the first neck and sealed with the first neck.

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

9. The rotary compressor according to claim 8, 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 chamber.

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

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