Oil separator and compressor

Abstract

The oil separator comprises a separator body with a containing cavity, a first opening is formed in the side wall of the separator body, a second opening is formed in the first end of the separator body, a third opening is formed in the second end of the separator body, and an exhaust structure can be inserted into the third opening; after the exhaust structure is inserted into the containing cavity, the projection position of the lowest point, located in the containing cavity, of the exhaust structure in the vertical direction is lower than the projection position of the first opening in the vertical direction and higher than the projection position of the second opening in the vertical direction. The separator main body is provided with the first opening, the second opening and the third opening, when exhaust gas of a compressor enters the separator main body, rotating airflow is generated, under the action of centrifugal force, lubricating oil is separated and flows to the second opening to be exhausted, gas is exhausted through the exhaust structure, and separation of the lubricating oil and a refrigerant is achieved; and the lubricating oil and the refrigerant cannot be fused again, so that the separation effect of the lubricating oil and the refrigerant is improved.

Description

Technical Field

[0001] The invention relates to the technical field of compressors, in particular to an oil separator and a compressor. Background Art

[0002] Compared with horizontal rotary compressors, the exhaust of vertical rotary compressors is generally located below the motor inside the compressor. Therefore, the exhaust will be blocked by the motor before being discharged from the compressor. The high-temperature refrigerant and lubricating oil mixed airflow separates part of the lubricating oil under the stirring action of the motor, resulting in less oil output from the compressor. The exhaust of horizontal compressors can be discharged from the compressor at one end of the pump body without passing through the motor, and the internal space of the horizontal compressor is more compact, so the oil output of the horizontal compressor is higher than that of the vertical one. However, whether it is a vertical compressor or a horizontal compressor, there is a lack of a structure inside the compressor to separate the lubricating oil. Once the amount of lubricating oil in the compressor is insufficient, it will have a huge impact on the normal operation of the compressor. Therefore, the oil discharge problem of the compressor has always been an important factor affecting the life of the compressor.

[0003] In the process of implementing the present invention, the inventors found that there are at least the following problems in the prior art: Existing compressors generally use a filter in front of the exhaust pipe to improve the oil discharge of the compressor. Although the filter in front of the exhaust pipe can block oil droplets and achieve oil-gas separation, the separated lubricating oil is attached to the vicinity of the filter, that is, near the exhaust port, so there will still be continuous exhaust gas impacting the lubricating oil, causing the lubricating oil and refrigerant to merge again and finally be discharged from the compressor again, resulting in poor separation of the lubricating oil and refrigerant. Summary of the invention

[0004] The object of the present invention is to provide an oil separator and a compressor to improve the problems existing in the prior art, enhance the separation effect of lubricating oil and refrigerant, and thus improve the oil discharge volume of the compressor.

[0005] In a first aspect, the present invention provides an oil separator, comprising: A separator body having a receiving cavity, the separator body comprising a first end and a second end, a side wall of the separator body being provided with a first opening communicating with the receiving cavity, a first end of the separator body being provided with a second opening communicating with the receiving cavity, and a second end of the separator body being provided with a third opening communicating with the receiving cavity, wherein the third opening is provided for the exhaust structure to be inserted; in: After the exhaust structure is inserted into the accommodating cavity, the exhaust structure is located at the projection position of the lowest point in the accommodating cavity in the vertical direction, which is lower than the projection position of the first opening in the vertical direction and higher than the projection position of the second opening in the vertical direction.

[0006] An oil separator as described above, wherein, optionally, a drainage portion is provided at the first end of the separator body, the second opening is provided at the drainage portion, and the drainage portion is used to guide the oil to flow toward the second opening.

[0007] An oil separator as described above, wherein, optionally, the drainage portion includes a first end and a second end, the first end of the drainage portion is connected to the first end of the separator body, the second end of the drainage portion is connected to the bottom of the first opening, and the diameter of the drainage portion decreases linearly from the second end of the drainage portion to the first end of the drainage portion.

[0008] In a second aspect, the present invention provides a compressor comprising the aforementioned oil separator.

[0009] A compressor as described above, wherein, optionally, the compressor includes an oil return pipe and a core assembly, one end of the oil return pipe is connected to the second opening, and the other end of the oil return pipe is connected to the core cutting edge of the core assembly.

[0010] A compressor as described above, wherein, optionally, the compressor includes a main shell, a first cover body and a second cover body, the first cover body and the second cover body are respectively arranged at opposite ends of the main shell, and the oil separator is fixed on the first cover body.

[0011] In the compressor as described above, optionally, the second end of the separator body has a flange, and the oil separator is welded to the first cover body through the flange.

[0012] A compressor as described above, wherein, optionally, a muffler is provided in the main shell, and the muffler can be used to discharge the gas discharged after compression by the compressor.

[0013] A compressor as described above, wherein, optionally, the compressor includes a main shell, a first cover body and a second cover body, the first cover body and the second cover body are respectively arranged at opposite ends of the main shell, and the oil separator is fixed to the inner side wall of the main shell located above.

[0014] A compressor as described above, wherein, preferably, a connecting pipe is provided at the second end of the separator body, the connecting pipe is connected to the third opening, and the connecting pipe is located at the position of the projection of the lowest point in the accommodating cavity in the vertical direction, lower than the position of the projection of the first opening in the vertical direction, and higher than the position of the projection of the second opening in the vertical direction.

[0015] Compared with the prior art, the technical solution provided by the present invention has at least the following beneficial effects: The present invention sets a first opening on the side wall of the separator body, and sets a second opening and a third opening on the first end and the second end of the separator body respectively. The accommodating chamber is connected with the first opening, the second opening and the third opening. The exhaust structure can extend to the inside of the accommodating chamber of the separator body through the third opening. When the exhaust gas of the compressor enters the separator body through the first opening, the mixed gas can generate a rotating airflow under the obstruction of the exhaust structure. Under the action of centrifugal force, the liquid lubricating oil can be separated to the inner wall surface of the separator body, and can flow to the second opening along the inner wall surface of the separator body. The separated gas can be discharged by the exhaust structure, thereby realizing the separation of the lubricating oil and the refrigerant, and the lubricating oil and the refrigerant will not merge again, thereby improving the separation effect of the lubricating oil and the refrigerant, thereby effectively improving the oil discharge amount of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a cross-sectional view of an oil separator provided by an embodiment of the present invention; Figure 2 is a partial cross-sectional view of an oil separator provided by an embodiment of the present invention fixed inside a compressor; Figure 3 is a cross-sectional view of a compressor provided by one embodiment of the present invention; Figure 4 is a cross-sectional view of a compressor provided by another embodiment of the present invention.

[0017] Description of reference numerals: 10-oil separator, 11-separator body, 111-first opening, 112-second opening, 113-third opening, 114-accommodating chamber, 115-flange, 12-drainage portion, 13-connecting pipe; 20-compressor, 21-exhaust structure, 22-oil return pipe, 23-motor, 231-iron core assembly, 232-iron core cutting edge, 24-main housing, 25-first cover body, 26-second cover body, 27-muffler, 28-compressor body, 29-crankshaft; D1 - First direction. DETAILED DESCRIPTION

[0018] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, but should not be construed as limiting the present invention.

[0019] First, refer to Figure 1 As shown, the present invention provides an oil separator 10, which can be applied to a rotary compressor. The oil separator 10 includes a separator body 11, wherein: The separator body 11 is roughly cylindrical (or cylindrical funnel-shaped), and has a accommodating chamber 114 therein. The side wall of the cylindrical separator body 11 is provided with a first opening 111 connected to the accommodating chamber 114. The first opening 111 serves as an air inlet, and the gas discharged from the pump body of the compressor 20 after compression is completed can enter the accommodating chamber 114 through the air inlet. The separator body 11 includes a first end and a second end. The first end of the separator body 11 is provided with a second opening 112 communicating with the accommodating chamber 114. The second end of the separator body 11 is provided with a third opening 113 communicating with the accommodating chamber 114. The second opening 112 serves as an oil outlet. The oil separated by the oil separator 10 can be discharged from the oil outlet (i.e., the second opening 112); the third opening 113 can be inserted into the exhaust structure (or exhaust pipe) 21. The exhaust structure 21 at least partially extends into the accommodating chamber 114. The third opening 113 serves as an exhaust port. The exhaust structure 21 serves as an exhaust channel after oil and gas separation. After the action of the oil separator 10, the gas separated from the oil can be discharged from the exhaust structure 21.

[0020] In the embodiment provided in this application, the first direction D1 is Figure 1 In the vertical direction, the second end of the separator body 11 is located above the first end of the separator body 11. In order to separate the oil (lubricating oil) from the gas in the mixed gas, after the exhaust structure 21 is inserted into the accommodating cavity 114, in the first direction D1, the projection of the first opening 111 is farther away from the first end of the separator body 11 than the projection of the exhaust structure 21 closest to the first end of the separator body 11, that is, the position of the projection of the lowest point of the exhaust structure 21 in the accommodating cavity 114 in the first direction D1 is lower than the position of the projection of the first opening 111 in the first direction D1.

[0021] Since the separator body 11 is roughly cylindrical and the lowest point of the first opening 111 is higher than the lowest point of the exhaust structure 21, when the exhaust gas of the compressor 20 enters the accommodating chamber 114 from the first opening 111, it will be blocked by the exhaust structure 21, thereby causing the gas to rotate. Under the action of centrifugal force, the oil with a larger mass is thrown out and separated from the gas. The separated gas can be discharged from the exhaust structure 21.

[0022] In order to allow the separated oil to flow out more fully from the second opening 112, the projection of the exhaust structure 21 closest to the first end of the separator body 11 is arranged in the first direction D1, which is offset from the projection of the second opening 112 closest to the second end of the separator body 11. That is, the position of the projection of the lowest point of the exhaust structure 21 in the accommodating chamber 114 in the first direction D1 is higher than the position of the projection of the second opening 112 in the first direction D1, that is, the position of the projection of the highest point of the second opening 112 in the accommodating chamber 114 in the first direction D1 is below the position of the projection of the lowest point of the exhaust structure 21 in the accommodating chamber 114 in the first direction D1, so that the separated oil can flow more fully to the second opening 112 under the action of gravity, thereby more effectively avoiding the situation that part of the oil adheres to the inner wall surface of the separator body 11 and mixes with the separated gas.

[0023] The oil separator 10 of the present application can be used in series or in parallel to enhance the separation effect of the oil separator 10 , and can be configured according to actual separation requirements, which is not limited here.

[0024] In a feasible embodiment, a drainage portion 12 is provided at the first end of the separator body 11, and a second opening 112 is provided at the drainage portion 12. The drainage portion 12 is used to guide the oil to flow toward the second opening 112. Under the guiding action of the drainage portion 12, the separated oil can flow to the second opening 112 more fully, thereby improving the separation efficiency and separation effect of the oil separator 10.

[0025] Preferably, the drainage portion 12 includes a first end and a second end. Figure 1 As shown, the second end of the drainage portion 12 is located above the first end of the drainage portion 12, the first end of the drainage portion 12 is connected to the first end of the separator body 11, and the second end of the drainage portion 12 is connected to the bottom of the first opening 111. The diameter of the drainage portion 12 decreases linearly from the second end of the drainage portion 12 to the first end of the drainage portion 12. Since the separator body 11 is roughly cylindrical, the drainage portion 12 is funnel-shaped as a whole. Part of the separated oil falls directly into the second opening 112, and part of the oil adheres to the inner wall surface of the separator body 11. Under the action of gravity, the attached oil can flow along the inner wall surface of the separator body 11 to the drainage portion 12, and then along the inner wall surface of the funnel-shaped drainage portion 12, gather at the second opening 112.

[0026] In other embodiments, the drainage portion 12 may adopt other structures or components that can guide the oil to flow toward the second opening 112 , which is not limited here.

[0027] In a second aspect, the present invention provides a compressor 20, which may be a vertical or horizontal rotary compressor. The compressor 20 includes the aforementioned oil separator 10. The gas discharged from the compressor 20 after compression is completed can be separated from the refrigerant and the lubricating oil by the oil separator 10, and the oil separator 10 has a high separation efficiency and can effectively avoid secondary mixing of the refrigerant and the lubricating oil, thereby effectively improving the oil discharge of the compressor 20.

[0028] Reference Figure 2 as well as Figure 3 As shown, the compressor 20 includes an oil return pipe 22 and an iron core assembly 231. One end of the oil return pipe 22 is connected to the second opening 112, and the other end of the oil return pipe 22 is connected to the iron core cutting edge 232 of the iron core assembly 231. The oil separated by the oil separator 10 flows into the oil return pipe 22 through the second opening 112. The iron core cutting edge 232 may be provided with a through hole or channel connected to the oil storage structure. The oil flowing through the oil return pipe 22 flows to the iron core cutting edge 232, and then flows back to the oil storage structure, thereby realizing the recycling of the oil.

[0029] In the embodiments provided in this application, refer to Figure 3 As shown, the compressor 20 includes a main shell 24, a first cover body 25 and a second cover body 26. The first cover body 25 and the second cover body 26 are respectively arranged at opposite ends of the main shell 24. The compressor 20 of this embodiment is a vertical compressor 20, so the first cover body 25 is connected to the top of the main shell 24, and the second cover body 26 is connected to the bottom of the main shell 24. The oil separator 10 is fixed on the first cover body 25, that is, the oil separator 10 is fixed to the first cover body 25 and is located in the main shell 24.

[0030] In order to improve the firmness of the connection between the oil separator 10 and the compressor 20, a flange 115 is provided at the second end of the separator body 11, and the oil separator 10 is welded to the first cover body 25 through the flange 115. Since the flange 115 has a certain area, the welding area between the oil separator 10 and the first cover body 25 is increased, thereby strengthening the connection strength between the oil separator 10 and the first cover body 25.

[0031] In a feasible embodiment, a muffler 27 is provided in the main housing 24, and the muffler 27 can be used to discharge the gas discharged after compression by the compressor 20. The muffler 27 has the function of, on the one hand, absorbing the noise energy generated during the operation of the compressor 20 to reduce the noise; on the other hand, the muffler 27 can discharge the gas discharged after the compressor 20 is compressed, and after passing through the core assembly 231, enter the separator body 11 through the first opening 111 of the oil separator 10 to achieve oil-gas separation.

[0032] The compressor 20 of the present embodiment is a vertical compressor 20, which includes a compressor body 28 (pump body), a motor 23 (the motor 23 includes an iron core assembly 231), a crankshaft 29, a muffler 27 and an oil separator 10. The assembly process of the vertical compressor 20 includes: fixing the oil separator 10 to the first cover body 25, and when installing the first cover body 25, the return oil pipe 22 needs to be led to the iron core cutting edge 232 of the iron core assembly 231, and finally the first cover body 25 and the second cover body 26 are welded to the main shell 24.

[0033] In this embodiment, the process of oil-gas separation is as follows: during the compression of the refrigerant by the compressor body 28, the lubricating oil will merge with the refrigerant. Under the action of the muffler 27, the mixed gas of the lubricating oil and the refrigerant will be discharged into the cavity of the motor 23. Under the agitation of the motor 23, the mixed gas will undergo preliminary oil-gas separation. The mixed gas after preliminary separation enters the oil separator 10. Under the action of the oil separator 10, the lubricating oil is separated and flows into the return oil pipe 22 from the second opening 112, and then flows back to the oil storage structure through the return oil pipe 22. The separated refrigerant gas is directly discharged from the compressor 20 through the exhaust structure 21, which effectively avoids the secondary mixing of the lubricating oil and the refrigerant, thereby effectively improving the oil separation effect.

[0034] In another embodiment provided by the present application, refer to Figure 4 As shown, the compressor 20 includes a main housing 24, a first cover 25 and a second cover 26. The first cover 25 and the second cover 26 are respectively arranged at opposite ends of the main housing 24. The compressor 20 of this embodiment is a horizontal compressor 20, so the first cover 25 is connected to the left side of the main housing 24 (refer to Figure 4 As shown, the second cover 26 is connected to the right side of the main housing 24 (refer to Figure 4 As shown in FIG. 1 ), the oil separator 10 is fixed to the inner side wall of the main housing 24 located above.

[0035] The second end of the separator body 11 of this embodiment is also provided with a flange 115. The oil separator 10 is welded to the inner wall of the main shell 24 located above through the flange 115 to increase the welding area between the oil separator 10 and the main shell 24, thereby providing connection strength between the oil separator 10 and the main shell 24.

[0036] Compared with the vertical compressor 20, when welding the oil separator 10 of the horizontal compressor 20, since the plane where the third opening 113 is located is a curved surface, the oil separator 10 cannot be completely sealed and welded with the main shell 24, so a cover is required to be provided at the second end of the separator body 11, and a connecting pipe 13 is provided on the cover. The connecting pipe 13 is connected to the third opening 113 and can extend into the accommodating chamber 114. The connecting pipe 113 is located at the projection position of the lowest point in the accommodating chamber 114 in the vertical direction, which is lower than the projection position of the first opening 111 in the vertical direction and higher than the projection position of the second opening 112 in the vertical direction. The connecting pipe 13 is used to connect with the exhaust structure 21, and the gas after oil and gas separation can flow to the exhaust structure 21 through the connecting pipe 13 and be discharged. It can be understood that the connecting pipe 13 is equivalent to the first exhaust structure, and the exhaust structure 21 here is equivalent to the second exhaust structure, that is, the connecting pipe 13 and the exhaust structure 21 here are separately arranged, and the two together constitute the exhaust structure described in the embodiment of the oil separator 10.

[0037] The assembly process of the compressor 20 of this embodiment includes: welding the oil separator 10 to the inner wall of the main shell 24 at the top, leading the return oil pipe 22 to the oil storage structure, and finally welding the first cover body 25 and the second cover body 26 to the left and right sides of the main shell 24 respectively.

[0038] The oil separator 10 of the present application has a simple and compact structure, good oil-gas separation effect, simple installation method, no need to increase production costs during production, and can be applied to a variety of compressors 20.

[0039] Based on the above embodiments, the oil separator 10 provided in the present application can be applied to both a vertical compressor 20 and a horizontal compressor 20. However, compared with the vertical compressor 20, the internal space of the horizontal compressor 20 is relatively narrow. Since the oil separator 10 has a compact structure, it can still be installed in the compressor 20 even if the space is narrow to achieve oil-gas separation, thereby improving the oil discharge volume of the compressor 20.

[0040] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings. The above is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown in the drawings. Any changes made according to the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and drawings, should be within the protection scope of the present invention.

Claims

1. An oil separator, characterized in that: include: A separator body having a receiving cavity, the separator body comprising a first end and a second end, a side wall of the separator body being provided with a first opening communicating with the receiving cavity, a first end of the separator body being provided with a second opening communicating with the receiving cavity, and a second end of the separator body being provided with a third opening communicating with the receiving cavity, wherein the third opening is provided for the exhaust structure to be inserted; in: After the exhaust structure is inserted into the accommodating cavity, the exhaust structure is located at the projection position of the lowest point in the accommodating cavity in the vertical direction, which is lower than the projection position of the first opening in the vertical direction and higher than the projection position of the second opening in the vertical direction.

2. The oil separator according to claim 1, characterized in that: A drainage portion is provided at the first end of the separator body, and the second opening is provided at the drainage portion, and the drainage portion is used to guide the oil to flow toward the second opening.

3. The oil separator according to claim 2, characterized in that: The drainage portion includes a first end and a second end, the first end of the drainage portion is connected to the first end of the separator body, the second end of the drainage portion is connected to the bottom of the first opening, and the diameter of the drainage portion decreases linearly from the second end of the drainage portion to the first end of the drainage portion.

4. A compressor, characterized in that: An oil separator comprising the oil separator according to any one of claims 1 to 3.

5. The compressor according to claim 4, characterized in that The compressor comprises an oil return pipe and an iron core assembly, one end of the oil return pipe is communicated with the second opening, and the other end of the oil return pipe is connected to the iron core cutting edge of the iron core assembly.

6. The compressor according to claim 4, characterized in that The compressor comprises a main shell, a first cover body and a second cover body, wherein the first cover body and the second cover body are respectively arranged at opposite ends of the main shell, and the oil separator is fixed on the first cover body.

7. The compressor according to claim 6, characterized in that The second end of the separator body has a flange, and the oil separator is welded to the first cover body through the flange.

8. The compressor according to claim 6, characterized in that A muffler is arranged in the main shell, and the muffler can be used to discharge the gas discharged after being compressed by the compressor.

9. The compressor according to claim 4, characterized in that The compressor comprises a main shell, a first cover body and a second cover body, wherein the first cover body and the second cover body are respectively arranged at opposite ends of the main shell, and the oil separator is fixed to the inner side wall of the main shell located at the upper side.

10. The compressor according to claim 9, characterized in that A connecting pipe is provided at the second end of the separator body, and the connecting pipe is connected to the third opening. The connecting pipe is located at the projection position of the lowest point in the accommodating cavity in the vertical direction, lower than the projection position of the first opening in the vertical direction, and higher than the projection position of the second opening in the vertical direction.

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