Compressors and refrigeration systems

Abstract

The present application provides a compressor and a refrigeration system. The compressor includes a housing, a pump assembly arranged in the housing, and an oil pool located at the bottom of the housing. The bottom outer side of the pump assembly is covered with a heat insulation cover (2). The pump assembly includes a cylinder (3) and a lower flange (4). The heat insulation cover (2) is arranged outside the lower flange (4) and the cylinder (3) adjacent to the lower flange (4), and separates the lower flange (4) from the oil pool. The heat insulation cover (2) is provided with an air intake channel (5) corresponding to the air intake port of the cylinder (3). According to the compressor of the present application, it is possible to isolate or reduce the harmful heat transfer between the high-temperature refrigeration oil and the pump assembly, thereby improving the performance of the compressor.

Description

Technical Field

[0001] The present application relates to the technical field of compressors, and in particular to a compressor and a refrigeration system. Background Art

[0002] At present, with the development of the air-conditioning industry, higher requirements are put forward for the energy efficiency of household air conditioners. If traditional air-conditioning companies want to maintain sufficient competitiveness, they need to continuously improve the efficiency of their products. As the heart of air-conditioning products, the performance of the compressor is directly related to the energy efficiency of air conditioners, so the research and development of efficiency improvement of the compressor part is becoming more and more urgent.

[0003] In the past, the idea of ​​improving the efficiency of compressors was mainly focused on the modification of the pump body structure, and the effect was limited. The heat transfer of the pump body is actually an aspect that has a greater impact on the energy efficiency of the compressor. The rotary compressor in the traditional household air conditioner is a fully enclosed refrigeration compressor, which adopts a high back pressure shell structure. When the compressor is running, the high-temperature and high-pressure refrigerant gas discharged from the pump body first enters the shell and then is discharged through the exhaust port. The refrigerant oil at the bottom of the shell not only lubricates and seals the moving parts, but also cools the motor during the rising process as the pump exhausts, and finally separates from the refrigerant gas at the top of the shell and falls back to the oil pool at the bottom of the shell. In this reciprocating process, the refrigerant oil is also heated to a higher temperature. During the operation, a large part of the compressor pump body assembly is immersed in the high-temperature oil pool, which will undoubtedly cause the oil pool to heat the lower pump body and the low-temperature and low-pressure refrigerant in the pump body, thereby causing ineffective overheating of the low-temperature and low-pressure refrigerant, and ultimately affecting the performance of the compressor. During operation, the refrigerant oil produces strong internal disturbances due to the action of the oil guide plate pump oil and the exhaust pressure pulse of the pump body. Under the strong internal disturbance, the high-temperature refrigerant oil produces strong heat exchange (convection heat transfer) with the outer wall of the pump body in contact with it, causing the overall temperature of the pump body to rise rapidly, further aggravating the ineffective overheating of the pump body to the low-temperature refrigerant sucked in. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present application is to provide a compressor and a refrigeration system that can isolate or weaken the harmful heat transfer between high-temperature refrigeration oil and pump body components, thereby improving the performance of the compressor.

[0005] In order to solve the above problems, the present application provides a compressor, including a shell, a pump body assembly arranged in the shell, and an oil pool located at the bottom of the shell, the bottom outer cover of the pump body assembly is provided with a heat insulation cover, the pump body assembly includes a cylinder and a lower flange, the heat insulation cover is arranged outside the lower flange and the cylinder adjacent to the lower flange, and separates the lower flange from the oil pool, and an intake channel is provided on the heat insulation cover corresponding to the intake port of the cylinder.

[0006] Preferably, the cylinder is further provided with a sliding vane groove and a spring cavity located at the rear end of the sliding vane groove, and a spring hole is provided on the heat insulation cover corresponding to the spring cavity.

[0007] Preferably, the heat shield comprises a cylindrical portion sleeved outside the cylinder and a truncated cone portion sleeved outside the lower flange, the lower flange comprises a shaft neck, and the truncated cone portion achieves a sealing fit between the bottom and the shaft neck.

[0008] Preferably, an annular groove is provided on the outer peripheral wall of the journal, a heat insulation plate is provided at the bottom of the truncated cone cylinder, a mounting hole is provided on the heat insulation plate, and a side wall of the mounting hole is embedded in the annular groove.

[0009] Preferably, a sealing ring is arranged in the annular groove, the sealing ring has an annular groove, and the side wall of the mounting hole is embedded in the annular groove.

[0010] Preferably, an oil unloading channel is provided on the side wall of the heat insulation cover corresponding to the lower flange, and the oil unloading channel penetrates the side wall of the heat insulation cover along the thickness direction of the heat insulation cover.

[0011] Preferably, the height of the opening of the oil unloading channel on the inner side wall of the heat insulation cover is higher than the height of the opening of the oil unloading channel on the outer side wall of the heat insulation cover.

[0012] Preferably, the oil unloading passage comprises oil unloading holes extending in the up-down direction of the heat insulation cover, and a plurality of oil unloading holes are arranged at intervals along the circumference of the heat insulation cover.

[0013] Preferably, the oil unloading channel includes a strip hole extending along the circumference of the heat insulation cover, the strip hole includes an inner hole section, a connecting hole section and an outer hole section, the outer hole section is located on the outer circumference side of the heat insulation cover, the inner hole section is located on the inner circumference side of the heat insulation cover, the connecting hole section is located inside the heat insulation cover and connects the inner hole section and the outer hole section.

[0014] Preferably, when the heat shield comprises a cylindrical portion and a truncated cone cylindrical portion, the height of the oil unloading passage on the inner side wall of the truncated cone cylindrical portion is higher than 1 / 2 of the axial height of the truncated cone cylindrical portion.

[0015] Preferably, when the heat shield comprises a cylindrical portion and a truncated cone cylindrical portion, a mounting hole is provided on the cylindrical portion, and screws are passed through the mounting hole to fix the cylindrical portion to the cylinder.

[0016] Preferably, when the heat shield comprises a cylindrical portion and a truncated cone cylindrical portion, a buckled skirt is provided on the inner circumference of the top of the cylindrical portion, and the heat shield is buckled on the cylinder via the buckled skirt.

[0017] Preferably, the heat shield is an integrally formed structure.

[0018] Preferably, the heat shield is divided into at least two segmented bodies along the circumferential direction, and the segmented bodies are provided with connecting skirts at the connecting edges, and adjacent segmented bodies are fixedly connected by the connecting skirts.

[0019] Preferably, when the heat insulation cover includes a cylindrical portion and a conical cylindrical portion, the connecting skirt includes a first connecting section located on the cylindrical portion and a second connecting section located on the conical cylindrical portion, the first connecting section is located on the inner circumference of the cylindrical portion, and the second connecting section is located on the outer circumference of the conical cylindrical portion. Bolt connecting holes are provided on the connecting skirt, and adjacent segmented bodies are fixedly connected by bolts.

[0020] Preferably, the bolt connection hole is located on the second connection section.

[0021] According to another aspect of the present application, a refrigeration system is provided, comprising a compressor, which is the above-mentioned compressor.

[0022] The compressor provided by the present application includes a housing, a pump body assembly arranged in the housing, and an oil pool located at the bottom of the housing. The bottom outer cover of the pump body assembly is provided with a heat insulation cover. The pump body assembly includes a cylinder and a lower flange. The heat insulation cover is arranged outside the lower flange and the cylinder adjacent to the lower flange, and separates the lower flange from the oil pool. The heat insulation cover is provided with an air intake channel corresponding to the air intake port of the cylinder. The heat insulation cover of the compressor realizes a full surrounding structure for the lower flange and the cylinder adjacent to the lower flange, and reserves an air intake channel at the position where the air intake pipeline needs to be connected, which will not affect the connection between the air intake pipeline and the cylinder. At the same time, the connection of the air intake pipeline can form a seal for the air intake channel, thereby more effectively surrounding the cylinder and the lower flange in the heat insulation cover, so as to more effectively isolate or weaken the harmful heat transfer between the high-temperature refrigeration oil and the pump body assembly, reduce the harmful heating of the pump body itself to the inhaled low-temperature and low-pressure refrigerant, and improve the performance of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of a pump assembly of a compressor according to an embodiment of the present application;

[0024] Figure 2 A three-dimensional structural diagram of a heat insulation cover of a compressor according to an embodiment of the present application;

[0025] Figure 3 A cross-sectional structural diagram of a heat shield of a compressor according to an embodiment of the present application;

[0026] Figure 4 A three-dimensional structural diagram of a heat insulation cover of a compressor according to an embodiment of the present application;

[0027] Figure 5 A cross-sectional structural diagram of a heat shield of a compressor according to an embodiment of the present application;

[0028] Figure 6 A three-dimensional structural diagram of a segmented body of a heat insulation cover of a compressor according to an embodiment of the present application;

[0029] Figure 7A structural diagram of a segmented body of a heat shield of a compressor according to an embodiment of the present application;

[0030] Figure 8 A three-dimensional structural diagram of a segmented body of a heat insulation cover of a compressor according to an embodiment of the present application;

[0031] Fig. 9 A structural diagram of a segmented body of a heat shield of a compressor according to an embodiment of the present application;

[0032] Fig.10 This is a schematic structural diagram of a pump assembly of a compressor according to an embodiment of the present application;

[0033] Fig.11 This is a schematic diagram of the three-dimensional structure of a pump assembly of a compressor according to an embodiment of the present application;

[0034] Fig.12 This is a schematic structural diagram of a lower flange of a compressor according to an embodiment of the present application;

[0035] Fig.13 This is a schematic cross-sectional structural diagram of a lower flange of a compressor according to an embodiment of the present application;

[0036] Fig.14 This is a schematic structural diagram of a sealing ring of a compressor according to an embodiment of the present application.

[0037] The reference numerals are as follows:

[0038] 1. Segmented body; 2. Heat shield; 3. Cylinder; 4. Lower flange; 5. Intake channel; 6. Spring hole; 7. Cylinder; 8. Cone cylinder; 9. Journal; 10. Annular groove; 11. Heat shield; 12. Mounting hole; 13. Sealing ring; 14. Oil unloading channel; 15. Snap-fit ​​skirt; 16. Connecting skirt; 17. First connecting section; 18. Second connecting section; 19. Bolt connection hole; 20. Inner hole section; 21. Connecting hole section; 22. Outer hole section; 23. Fixing hole. DETAILED DESCRIPTION

[0039] In the related art, during the operation of the compressor, the refrigerant oil at the bottom of the compressor is immersed to the upper flange skirt position, the crankshaft rotates at high speed driven by the motor, and the oil guide plate located in the central oil hole of the crankshaft short shaft pumps the refrigerant oil into the pump body and discharges it from the crankshaft long shaft oil hole. Since the traditional rotor compressor is a fully enclosed refrigeration compressor, a high back pressure shell structure is adopted. When the compressor is running, the high-temperature and high-pressure refrigerant gas discharged from the pump body first enters the shell and then is discharged through the exhaust port. The refrigerant oil at the bottom of the shell not only lubricates and seals the moving parts, but also cools the motor during the rising process as the pump body exhausts the gas, and finally separates from the refrigerant gas at the top of the shell and falls back into the oil pool at the bottom of the shell. In this reciprocating process, the refrigerant oil is also heated to a higher temperature. During operation, a large part of the compressor pump assembly is immersed in a high-temperature oil pool. The high-temperature oil pool at the bottom of the compressor will inevitably exchange heat with the contact part of the pump body and cause the temperature of the pump body parts to rise. The heated pump body assembly will further exchange heat with the low-temperature, low-pressure refrigerant sucked into the pump body, causing ineffective overheating of the low-temperature, low-pressure refrigerant, thereby affecting the performance of the compressor. In addition, during the operation of the compressor, the refrigerant oil at the bottom of the compressor is strongly disturbed by the oil guide plate pump oil and the pump body exhaust pressure pulse. Under strong disturbance, the heat exchange rate between the high-temperature refrigerant and the outer wall of the pump body will be greatly increased, causing the overall temperature of the pump body to rise rapidly, further worsening the ineffective overheating of the pump body to the low-temperature refrigerant sucked in.

[0040] In order to solve the above problems, refer to Figures 1 to 14 As shown, according to an embodiment of the present application, the compressor includes a shell, a pump body assembly arranged in the shell, and an oil pool located at the bottom of the shell, the bottom outer side of the pump body assembly is provided with a heat insulation cover 2, the pump body assembly includes a cylinder 3 and a lower flange 4, the heat insulation cover 2 is arranged outside the lower flange 4 and the cylinder 3 adjacent to the lower flange 4, and separates the lower flange 4 from the oil pool, and an intake channel 5 is provided on the heat insulation cover 2 corresponding to the intake port of the cylinder 3.

[0041] The heat insulation cover 2 of the compressor fully surrounds the lower flange 4 and the cylinder 3 adjacent to the lower flange 4, and reserves an intake channel 5 at the position where the intake pipeline needs to be connected, which will not affect the connection between the intake pipeline and the cylinder 3. At the same time, the connection of the intake pipeline can form a seal for the intake channel 5, and the cylinder 3 and the lower flange 4 are completely surrounded by the heat insulation cover 2, so that the cylinder 3 at the intake port position also becomes a fully closed structure, and a heat insulation cavity is formed between the lower end surface of the lower flange 4 and the high-temperature oil pool, which reduces the harmful heat transfer of the oil pool to the pump body assembly, and can also prevent the refrigerant oil in the high-temperature oil pool that is violently disturbed under high-frequency conditions from being splashed and entering the heat insulation cover 2 from the intake port position for heat conduction, thereby more effectively isolating or reducing the harmful heat transfer between the high-temperature refrigerant oil and the pump body assembly, reducing the harmful heating of the pump body itself to the inhaled low-temperature and low-pressure refrigerant, and improving the performance of the compressor.

[0042] In one embodiment, the cylinder 3 is also provided with a slide groove and a spring cavity at the tail end of the slide groove, and a spring hole 6 is provided on the heat insulation cover 2 corresponding to the spring cavity. In this embodiment, by providing the spring hole 6 at a position corresponding to the spring cavity on the heat insulation cover 2, it is convenient to operate the structure in the spring cavity from the spring hole 6, thereby reducing the difficulty of operation. In order to prevent high-temperature refrigeration oil from entering the interior of the heat insulation cover 2 from the spring hole 6, a sealing plug can be provided at the spring hole 6. When the spring hole 6 needs to be opened, the sealing plug can be taken out. When the spring hole 6 does not need to be opened, the spring hole 6 can be closed by the sealing plug, so that the heat insulation cover 2 forms a more effective fully sealed structure. The sealing plug and the spring hole 6 can be fixed by a threaded structure.

[0043] In one embodiment, the spring hole 6 may not be provided on the heat insulation cover 2, and the heat insulation cover 2 is used to form a stop limit for the end of the spring located in the spring cavity.

[0044] In one embodiment, the heat shield 2 includes a cylindrical portion 7 sleeved outside the cylinder 3 and a conical cylindrical portion 8 sleeved outside the lower flange 4. The lower flange 4 includes a journal 9. The conical cylindrical portion 8 achieves a sealing fit between the bottom and the journal 9.

[0045] In order to ensure the sealing effect between the conical cylinder 8 and the shaft neck 9, in one embodiment, the heat insulation plate 11 at the bottom of the conical cylinder 8 can be fitted on the lower end surface of the shaft neck 9, thereby forming a sealing fit with the lower end surface of the shaft neck 9. In another embodiment, the inner wall of the mounting hole 12 of the heat insulation plate 11 at the bottom of the conical cylinder 8 can be fitted with the outer peripheral wall of the shaft neck 9, thereby forming a sealing fit.

[0046] In this embodiment, an annular groove 10 is provided on the outer peripheral wall of the journal 9, a heat insulation board 11 is provided at the bottom of the truncated cone cylinder 8, a mounting hole 12 is provided on the heat insulation board 11, and the side wall of the mounting hole 12 is embedded in the annular groove 10. By providing the annular groove 10 on the outer periphery of the journal 9 and embedding the heat insulation board 11 of the heat insulation cover 2 in the annular groove 10, the annular groove 10 can be used to form an axial limit for the heat insulation board 11, and since the heat insulation board 11 is embedded in the annular groove 10, the sealing effect between the heat insulation cover 2 and the journal 9 can be further improved.

[0047] In one embodiment, a sealing ring 13 is disposed in the annular groove 10. The sealing ring 13 has an annular groove, and the side wall of the mounting hole 12 is embedded in the annular groove, which can further reduce vibration and improve the sealing performance between the heat shield 2 and the shaft neck 9 of the lower flange 4. The sealing ring 13 is, for example, a rubber sealing ring.

[0048] In this embodiment, the heat shield 2 is sleeved at the lower position of the pump body assembly, and a semicircular annular groove 10 is provided on the outer peripheral wall of the journal 9 of the lower flange 4, and the sealing ring 13 is installed in the annular groove 10 of the lower flange 4, and the diameters of the sealing ring 13 and the annular groove 10 on the journal 9 of the lower flange 4 are consistent. A rectangular annular groove with a certain width and depth is provided on the outer periphery of the sealing ring 13, and the edge of the lower mounting hole 12 of the heat shield 2 is embedded in the rectangular annular groove of the sealing ring 13 through the rectangular annular groove to achieve sealing. During the operation of the compressor, due to the presence of the heat shield 2, the disturbance degree of the high-temperature refrigeration oil and high-temperature refrigerant gas that are in direct contact with the lower position of the pump body assembly is greatly reduced, and then the heat exchange rate between the outside and the pump body parts is also reduced, and correspondingly, the harmful overheating of the pump body itself to the low-temperature and low-pressure refrigerant gas sucked in is reduced.

[0049] In one embodiment, an oil unloading channel 14 is provided on the side wall of the heat insulation cover 2 corresponding to the lower flange 4 , and the oil unloading channel 14 penetrates the side wall of the heat insulation cover 2 along the thickness direction of the heat insulation cover 2 .

[0050] During the operation of the compressor, most of the refrigerant oil falling back from the top of the compressor will enter the inside of the heat insulation cover 2. In order to ensure the oil level height of the oil pool at the bottom of the compressor and meet the normal pumping oil and pump body lubrication needs of the oil guide plate of the crankshaft center oil hole, the refrigerant oil falling into the heat insulation cover 2 can fall back to the oil pool at the bottom of the compressor through the oil unloading channel 14 on the side wall of the heat insulation cover 2 after reaching a certain height.

[0051] In one embodiment, the opening height of the oil discharge passage 14 on the inner wall of the heat shield 2 is higher than the opening height of the oil discharge passage 14 on the outer wall of the heat shield 2. This structural design can prevent the oil pool at the bottom of the compressor from pouring into the heat shield 2 due to severe disturbance when the oil level is lower than the liquid level of the oil pool in the heat shield 2.

[0052] In one embodiment, the oil unloading passage 14 includes an oil unloading hole extending in the up-down direction of the heat shield 2, and the plurality of oil unloading holes are arranged at intervals along the circumference of the heat shield 2. In this embodiment, the oil unloading hole extends obliquely upward from the outer peripheral wall to the inner peripheral wall of the heat shield 2, and forms a certain angle with the central axis of the cylinder 3, so that it is convenient to unload the oil from the oil unloading hole after the oil level in the heat shield 2 reaches the inner height of the oil unloading hole, and it is also possible to prevent the oil in the oil pool outside the heat shield 2 from entering the heat shield 2 due to severe disturbance, thereby improving the working reliability and effectiveness of the heat shield 2.

[0053] In one embodiment, the oil discharge passage 14 includes a strip hole extending along the circumference of the heat shield 2, the strip hole includes an inner hole section 20, a connecting hole section 21 and an outer hole section 22, the outer hole section 22 is located on the outer circumference of the heat shield 2, the inner hole section 20 is located on the inner circumference of the heat shield 2, the connecting hole section 21 is located inside the heat shield 2, and connects the inner hole section 20 and the outer hole section 22. In this embodiment, there are multiple strip holes, and they are evenly spaced and arranged in the circumference of the heat shield 2, which can ensure the oil discharge effect and avoid a significant impact on the structural strength of the heat shield 2.

[0054] In this embodiment, the oil unloading channel 14 is divided into sections, and the connecting hole section 21 located inside the side wall of the heat shield 2 can be designed to be longer, thereby further increasing the height difference between the inner hole section 20 and the outer hole section 22, and more effectively preventing the oil in the external oil pool from entering the heat shield 2 due to severe disturbance. Since the inner hole section 20, the connecting hole section 21 and the outer hole section 22 form a bent structure, it is possible to more effectively increase the difficulty of the oil in the external oil pool entering the heat shield 2.

[0055] In one embodiment, when the heat shield 2 includes the cylindrical portion 7 and the conical cylindrical portion 8, the height of the oil discharge passage 14 on the inner side wall of the conical cylindrical portion 8 is higher than 1 / 2 of the axial height of the conical cylindrical portion 8. In this embodiment, the height on the inner side wall of the conical cylindrical portion 8 is designed to be higher than 1 / 2 of the axial height of the conical cylindrical portion 8, which can avoid the problem that the external oil level easily reaches the inner opening height of the oil discharge passage 14 of the conical cylindrical portion 8 due to the height on the inner side wall of the conical cylindrical portion 8 being too low, and then enters the heat shield 2, thereby improving the working performance of the heat shield 2.

[0056] In one embodiment, when the heat shield 2 includes the cylindrical portion 7 and the truncated cone cylindrical portion 8, a fixing hole 23 is provided on the cylindrical portion 7, and screws are passed through the fixing holes 23 to fix the cylindrical portion 7 to the cylinder 3. In this embodiment, the upper portion of the outer peripheral wall of the heat shield 2 is fixed to the outer peripheral side of the cylinder 3 by screws through the reserved fixing holes 23, thereby achieving the installation and fixation of the heat shield 2 on the cylinder 3.

[0057] In one embodiment, when the heat shield 2 includes the cylindrical portion 7 and the truncated cone cylindrical portion 8, a buckled skirt 15 is provided on the inner circumference of the top of the cylindrical portion 7, and the heat shield 2 is buckled on the cylinder 3 through the buckled skirt 15. In this embodiment, by adding the buckled skirt 15 to the heat shield 2, the heat shield 2 can be installed and fixed on the cylinder 3 by buckling, and the installation of the heat shield 2 is fixed from the upper and lower ends in cooperation with the axial limit of the heat shield 11 and the journal 9, which effectively ensures the stability of the installation structure of the heat shield 2 and avoids damage to the structure of the cylinder 3.

[0058] In this embodiment, the snap-fitting skirt 15 is snap-fitted to the outer edge of the non-finished surface of the cylinder 3 to achieve snap-fitting and fixing, thereby avoiding adverse effects on the structural accuracy of the cylinder 3 .

[0059] In one embodiment, the heat shield 2 is an integrally formed structure. In this embodiment, the cylindrical portion 7 and the truncated cone cylindrical portion 8 are an integrally formed structure, which can improve the structural stability and sealing performance of the heat shield 2 and reduce the difficulty of assembly.

[0060] In one embodiment, the heat shield 2 is divided into at least two segment bodies 1 along the circumferential direction. The segment bodies 1 are provided with connecting skirts 16 at the connecting edges. Adjacent segment bodies 1 are fixedly connected via the connecting skirts 16 .

[0061] In this embodiment, when the heat insulation cover 2 includes a cylindrical portion 7 and a conical cylindrical portion 8, the connecting skirt 16 includes a first connecting section 17 located on the cylindrical portion 7 and a second connecting section 18 located on the conical cylindrical portion 8. The first connecting section 17 is located on the inner circumference of the cylindrical portion 7, and the second connecting section 18 is located on the outer circumference of the conical cylindrical portion 8. Bolt connecting holes 19 are provided on the connecting skirt 16, and adjacent segment bodies 1 are fixedly connected by bolts.

[0062] In the present embodiment, since the cylindrical portion 7 is covered on the outside of the cylinder 3 and the space between the outside of the cylinder 3 and the shell is effective, if the first connecting section 17 is arranged on the outer peripheral wall of the cylindrical portion 7, since it is necessary to leave space for arranging the bolt connection hole 19, there must be certain requirements on the width of the first connecting section 17. In this case, in order to meet the requirements for the arrangement of the first connecting section 17, it is necessary to increase the outer diameter of the shell, thereby causing the structure of the entire compressor to become larger. However, if the first connecting section 17 is arranged on the inner side of the cylindrical portion 7 of the heat insulation cover 2, the non-circular portion of the cylinder can be used to effectively avoid this problem.

[0063] However, if all the connection skirts 16 are arranged on the inner side of the heat shield 2, it will make the installation and removal of the bolts difficult, inconvenient to operate, and increase the difficulty of installing the heat shield 2 outside the pump body assembly. Therefore, the embodiment of the present application divides the connection skirt 16 into sections, so that the first connection section 17 affected by the shell installation space is arranged on the inner side of the heat shield 2, and the second connection section 18 not affected by the shell installation space is arranged on the outer side of the heat shield 2, so as to facilitate the connection, fixation and removal between adjacent segment bodies 1, improve work efficiency and reduce the difficulty of operation.

[0064] In one embodiment, the bolt connection holes 19 are located on the second connection section 18. In this embodiment, all the bolt connection holes 19 are arranged on the second connection section 18, so that the installation and removal operations between the segment bodies 1 by bolts can be completed completely outside the heat insulation cover 2, making the structural design of the heat insulation cover 2 more reasonable and the operation more flexible and convenient.

[0065] In one embodiment, the heat insulation cover 2 is made of a material with low thermal conductivity, such as stainless steel, or a plastic material with high strength and hardness.

[0066] The wall thickness of the heat shield 2 is 0.5 mm to 5 mm.

[0067] According to an embodiment of the present application, a refrigeration system includes a compressor, which is the above-mentioned compressor.

[0068] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0069] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. A compressor, characterized in that: The invention comprises a housing, a pump assembly arranged in the housing, and an oil pool located at the bottom of the housing, wherein a heat insulating cover (2) is provided on the outer side of the bottom of the pump assembly, the pump assembly comprises a cylinder (3) and a lower flange (4), the heat insulating cover (2) is provided outside the lower flange (4) and the cylinder (3) adjacent to the lower flange (4), and separates the lower flange (4) from the oil pool, and an air intake channel (5) is provided on the heat insulating cover (2) corresponding to the air intake port of the cylinder (3); The heat shield (2) comprises a cylindrical portion (7) sleeved outside the cylinder (3) and a truncated cone cylindrical portion (8) sleeved outside the lower flange (4); the lower flange (4) comprises a shaft neck (9); and the truncated cone cylindrical portion (8) is sealed between the bottom and the shaft neck (9); An annular groove (10) is provided on the outer peripheral wall of the journal (9); a heat insulation plate (11) is provided at the bottom of the truncated cone cylinder (8); a mounting hole (12) is provided on the heat insulation plate (11); and a side wall of the mounting hole (12) is embedded in the annular groove (10); When the heat insulation cover (2) comprises a cylindrical portion (7) and a truncated cone cylindrical portion (8), a buckled skirt (15) is provided on the inner circumference of the top of the cylindrical portion (7), and the heat insulation cover (2) is buckled onto the cylinder (3) via the buckled skirt (15).

2. The compressor according to claim 1, characterized in that The cylinder (3) is also provided with a slide groove and a spring cavity located at the rear end of the slide groove, and the heat insulation cover (2) is provided with a spring hole (6) corresponding to the spring cavity.

3. The compressor according to claim 1, characterized in that A sealing ring (13) is arranged in the annular groove (10), the sealing ring (13) having an annular groove, and the side wall of the mounting hole (12) is embedded in the annular groove.

4. The compressor according to any one of claims 1 to 3, characterized in that An oil discharge channel (14) is provided on the side wall of the heat insulation cover (2) corresponding to the lower flange (4), and the oil discharge channel (14) penetrates the side wall of the heat insulation cover (2) along the thickness direction of the heat insulation cover (2).

5. The compressor according to claim 4, characterized in that The height of the hole of the oil unloading channel (14) on the inner wall of the heat insulation cover (2) is higher than the height of the hole of the oil unloading channel (14) on the outer wall of the heat insulation cover (2).

6. The compressor according to claim 4, characterized in that The oil unloading passage (14) comprises oil unloading holes extending in the up-down direction of the heat insulation cover (2), and a plurality of the oil unloading holes are arranged at intervals in the circumferential direction of the heat insulation cover (2).

7. The compressor according to claim 4, characterized in that When the heat shield (2) comprises a cylindrical portion (7) and a conical cylindrical portion (8), the height of the oil unloading passage (14) on the inner side wall of the conical cylindrical portion (8) is higher than 1 / 2 of the axial height of the conical cylindrical portion (8).

8. The compressor according to claim 1, characterized in that The heat insulation cover (2) is an integrally formed structure.

9. The compressor according to claim 1, characterized in that The heat insulation cover (2) is divided into at least two segmented bodies (1) along the circumferential direction, and the segmented bodies (1) are provided with connecting skirts (16) at the connecting edges, and adjacent segmented bodies (1) are fixedly connected via the connecting skirts (16).

10. The compressor according to claim 9, characterized in that When the heat shield (2) comprises a cylindrical portion (7) and a truncated cone cylindrical portion (8), the connecting skirt (16) comprises a first connecting section (17) located on the cylindrical portion (7) and a second connecting section (18) located on the truncated cone cylindrical portion (8), the first connecting section (17) being located on the inner circumference of the cylindrical portion (7), and the second connecting section (18) being located on the outer circumference of the truncated cone cylindrical portion (8), and bolt connection holes (19) being provided on the connecting skirt (16), and adjacent segment bodies (1) are fixedly connected by bolts.

11. The compressor according to claim 10, characterized in that The bolt connection hole (19) is located on the second connection section (18).

12. A refrigeration system comprising a compressor, characterized in that: The compressor is the compressor according to any one of claims 1 to 11.

Images