Filter assembly and compressor with same

Abstract

The invention provides a filter assembly and a compressor with the same. The filter assembly is installed in a machine shell of the compressor, the machine shell is provided with an exhaust port, the filter assembly comprises a filter structure located between a pump body assembly of the compressor and the exhaust port, the filter structure comprises a filter part and a connecting part which are connected with each other, the connecting part is arranged around the filter part, and at least part of the filter part protrudes towards or away from the pump body assembly. The compressor effectively solves the problem that in the prior art, the oil spitting rate is high when the compressor operates at a high speed or works through an R290 refrigerant.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning devices, and in particular to a filter assembly and a compressor having the same. Background Art

[0002] At present, as the core component of air-conditioning devices, the oil discharge level of compressors not only affects the reliability of the compressors themselves, but also has a great impact on the heat exchange performance of air-conditioning devices. With the development trend of global air-conditioning refrigerants towards low GWP and rotor compressors towards high speed and miniaturization, the oil discharge phenomenon of compressors is more serious under high-frequency operation or R290 refrigerant, which brings great challenges to the reliability of compressors and the performance of air-conditioning devices.

[0003] Specifically, the causes of high oil discharge rate of rotary compressors are concentrated in the following three areas:

[0004] First, due to the installation gap between the pump body parts, the high pressure inside the shell, and the low pressure cavity of the cylinder suction chamber, some lubricating oil will leak from the oil pool into the suction chamber. As the crankshaft rotates, the lubricating oil in the cavity is directly discharged to the lower cavity of the motor along with the refrigerant exhaust, and then discharged to the upper cavity of the motor from the rotor flow hole and the gap between the stator and rotor;

[0005] Second, the lubricating oil path of the pump body sucks oil from the crankshaft stub into each friction pair of the pump body, and then is directly discharged from the upper flange spiral groove to the lower cavity of the motor, and then discharged from the rotor flow hole and the stator-rotor gap to the upper cavity of the motor;

[0006] Third, due to the rotation of the motor, there are a large number of eddy currents in the lower cavity of the motor, which will cause the oil level in the oil pool to fluctuate greatly. Part of the lubricating oil will be discharged to the upper cavity of the motor along with the refrigerant through the rotor flow holes and the gap between the stator and rotor.

[0007] In order to solve the problem of high oil discharge rate of rotary compressor, a rolling rotor compressor is disclosed in the related art, which is used to block the gas-liquid mixture of refrigeration oil and high-pressure refrigerant by installing an oil retaining assembly on the upper flange of the pump body assembly, but this solution only reduces the oil discharge rate at the third of the three sources mentioned above, and the effect is limited. A pump body assembly, a rotary compressor, and an air conditioner are also disclosed in the related art, which reduce the oil discharge rate by constraining the ratio of the flow area of ​​the flange exhaust port and the flow area of ​​the muffler exhaust port, but this solution only reduces the oil discharge rate at the first of the three sources mentioned above, and the effect is limited. Summary of the invention

[0008] The main purpose of the present invention is to provide a filter assembly and a compressor having the same, so as to solve the problem in the prior art that the oil discharge rate of the compressor is high when the compressor is running at a high speed or using R290 refrigerant.

[0009] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided a filter assembly, which is installed in a casing of a compressor, the casing having an exhaust port, the filter assembly comprising: a filter structure, located between a pump body assembly and the exhaust port of the compressor, the filter structure comprising a filter portion and a connecting portion connected to each other, the connecting portion being arranged around the filter portion, and at least a portion of the filter portion protruding toward or away from the pump body assembly.

[0010] Furthermore, along the direction S from the middle to the edge of the filter part, the vertical distance h between the filter part and the surface where the exhaust port is located gradually decreases.

[0011] Furthermore, there is a preset distance H between the end of the exhaust pipe extending into the exhaust port and the middle of the filter part, and the preset distance H is greater than or equal to 3 mm.

[0012] Furthermore, the filter portion is a conical surface or a spherical surface; and / or the filter portion is a filter screen.

[0013] Furthermore, the filter assembly also includes: a support structure, which is located below the filter structure to support the filter structure; wherein the support structure is welded, or clamped, or connected to the inner surface of the casing by fasteners.

[0014] Furthermore, the filter assembly also includes: a crimping piece, which is connected to the connecting portion to press the connecting portion onto the casing or the supporting structure.

[0015] Furthermore, the support structure has a support protrusion and an oil return portion, wherein the support protrusion protrudes toward the filter portion to support the filter portion; wherein the oil attached to the filter portion flows into the compressor oil pool through the oil return portion.

[0016] Further, there is one oil return portion and it is located at one side of the supporting protrusion; or, there are multiple oil return portions, and the multiple oil return portions are arranged at intervals around the supporting protrusion.

[0017] Furthermore, the support structure also has a through hole, and the oil return portion is arranged on a part of the hole wall of the through hole to form an oil flow space around another part of the hole wall of the through hole; wherein at least part of the oil return portion extends toward the side away from the supporting protrusion.

[0018] Furthermore, the surface of the oil return portion facing the filter portion is a spherical surface, and the spherical surface is convex toward a side away from the filter portion.

[0019] Furthermore, the supporting structure includes: a surrounding plate connected to the casing; a supporting plate arranged on the surrounding plate, the middle part of the supporting plate protrudes toward the filter part to form a supporting protrusion; the through hole and the oil return part are both arranged on the part of the supporting plate surrounding the supporting protrusion.

[0020] According to another aspect of the present invention, a compressor is provided, including a casing, a pump body assembly, an exhaust pipe and a filter assembly, the casing having an exhaust port, the end of the exhaust pipe extending into the exhaust port, the pump body assembly and the filter assembly are both arranged in the casing; wherein the filter assembly is the above-mentioned filter assembly.

[0021] Furthermore, the casing comprises: a shell body; an upper cover, which is arranged on the shell body and has an exhaust port; wherein the filter assembly is arranged on the shell body and / or the upper cover.

[0022] Furthermore, the compressor also includes: a stator assembly, which is arranged in the casing, and a filter assembly is located above the stator assembly; wherein the filter assembly is arranged on the shell body, and there is a first distance L1 between the lower end surface of the filter assembly and the upper end surface of the stator assembly, and there is a second distance L2 between the upper end surface of the crimping part of the filter assembly and the inner top surface of the upper cover, and the first distance L1 is greater than the second distance L2.

[0023] According to the technical solution of the present invention, the filter assembly is installed in the casing of the compressor, the casing has an exhaust port, the filter assembly includes a filter structure, the filter structure is located between the pump body assembly and the exhaust port of the compressor, the filter structure includes a filter part and a connection part connected to each other, the connection part is arranged around the filter part, and at least part of the filter part protrudes toward or away from the pump body assembly. In this way, since the filter assembly is installed in the casing and is located between the pump body assembly and the exhaust port, the oil and gas can be separated in the final exhaust flow channel of the compressor, so as to greatly reduce the oil discharge rate of the compressor from the final exhaust flow channel, ensure the operating reliability of the compressor, reduce the friction power consumption of the compressor, and improve the working performance of the compressor, thereby solving the problem of high oil discharge rate of the compressor when operating at high speed or using R290 refrigerant in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1 A cross-sectional view of a compressor according to a first embodiment of the present invention is shown;

[0026] Figure 2 Shows Figure 1 A cross-sectional view of a filter assembly of a compressor in FIG.

[0027] Figure 3 Shows Figure 2 An exploded view of the filter components in ;

[0028] Figure 4 Shows Figure 3A schematic diagram of a three-dimensional structure of a support structure of a filter assembly;

[0029] Figure 5 Shows Figure 4 A cross-sectional view of the supporting structure in FIG.

[0030] Figure 6 A cross-sectional view of a second embodiment of a compressor according to the present invention is shown.

[0031] The above drawings include the following reference numerals:

[0032] 10. Casing; 11. Exhaust port; 12. Casing body; 13. Upper cover; 20. Filter structure; 21. Filter part; 22. Connecting part; 30. Pump body assembly; 40. Exhaust pipe; 50. Support structure; 51. Support convex part; 52. Oil return part; 53. Through hole; 54. Oil flow space; 55. Enclosure; 56. Support plate; 60. Crimping piece; 70. Stator assembly; 80. Compressor oil pool; 90. Welding point. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0035] In the present invention, unless otherwise specified, the directional words used, such as "up" and "down", usually refer to the directions shown in the drawings, or to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0036] In order to solve the problem in the prior art that the oil discharge rate of the compressor is high when running at high speed or using R290 refrigerant, the present application provides a filter assembly and a compressor having the same.

[0037] Embodiment 1

[0038] like Figures 1 to 5As shown, the filter assembly is installed in the casing 10 of the compressor, the casing 10 has an exhaust port 11, and the filter assembly includes a filter structure 20, wherein the filter structure 20 is located between the pump body assembly 30 of the compressor and the exhaust port 11, and the filter structure 20 includes a filter portion 21 and a connecting portion 22 that are interconnected, the connecting portion 22 is arranged around the filter portion 21, and at least a portion of the filter portion 21 protrudes away from the pump body assembly 30.

[0039] By applying the technical solution of this embodiment, since the filter assembly is installed in the casing 10 and is located between the pump body assembly 30 and the exhaust port 11, the oil and gas can be separated in the final exhaust flow channel of the compressor, so as to greatly reduce the oil discharge rate of the compressor from the final exhaust flow channel, ensure the operating reliability of the compressor, reduce the friction power consumption of the compressor, and improve the working performance of the compressor, thereby solving the problem of high oil discharge rate of the compressor when running at high speed or using R290 refrigerant in the prior art.

[0040] In this embodiment, the center of the filter portion 21 is convex upward, forming a state in which the center is high and the edge is low.

[0041] In this embodiment, the filter structure 20 is connected to the housing 10 via the connecting portion 22 . Since the connecting portion 22 is disposed around the filter portion 21 , the portion where the filter structure 20 is connected to the housing 10 will not affect the filtering effect of the filter structure 20 .

[0042] In this embodiment, the vertical distance h between the filter part 21 and the surface where the exhaust port 11 is located gradually decreases along the direction S from the middle to the edge of the filter part 21. In this way, the above arrangement not only increases the filtering area of ​​the filter part 21 and improves the filtering efficiency, but also facilitates the uniform distribution of the compressed gas, reduces the resistance of the gas flow, and improves the operating efficiency of the compressor.

[0043] Optionally, there is a preset distance H between the end of the exhaust pipe 40 extending into the exhaust port 11 and the middle of the filter 21, and the preset distance H is greater than or equal to 3 mm. In this way, the above setting of the preset distance H can prevent the exhaust pipe 40 from directly contacting the filter 21, ensure that the gaseous refrigerant has a sufficient flow area to flow out, avoid the influence of the vibration of the exhaust pipe 40 on the filter 21, and also ensure that the compressed gas is fully diffused in the filter 21, thereby improving the filtering effect.

[0044] Optionally, the filter part 21 is a conical surface or a spherical surface; and / or, the filter part 21 is a filter. In this way, the above arrangement makes the shape selection of the filter part 21 more flexible to meet different usage requirements and working conditions, and also improves the processing flexibility of the staff. At the same time, the above arrangement makes the structure of the filter part 21 simpler, easier to process and realize, and reduces the processing cost and difficulty of the filter part 21.

[0045] In this embodiment, the filter portion 21 is spherical in shape to increase the surface area of ​​the filter portion 21 , thereby improving the oil-gas separation efficiency of the filter portion 21 , while also facilitating the uniform distribution of the compressed gas and reducing the resistance to gas flow.

[0046] In this embodiment, the filter part 21 is a filter screen, which can effectively intercept oil and impurities, ensure the cleanliness of the compressed gas, further improve the oil-gas separation efficiency, and reduce the oil discharge rate of the compressor.

[0047] like Figures 1 to 5 As shown, the filter assembly further includes a support structure 50. The support structure 50 is located below the filter structure 20 to support the filter structure 20. In this way, the above-mentioned setting of the support structure 50 not only ensures the stability of the filter structure 20, but also optimizes the internal structure of the compressor, making the compressor more stable during operation and reducing noise.

[0048] Optionally, the support structure 50 is welded, clamped, or connected to the inner surface of the housing 10 by fasteners. In this way, the above arrangement makes the connection between the support structure 50 and the housing 10 more diverse to meet different usage requirements and working conditions, and also improves the processing flexibility of the staff.

[0049] In this embodiment, the support structure 50 is welded to the inner surface of the casing 10 at the welding point 90. In this way, the above connection method improves the connection stability between the support structure 50 and the casing 10, and avoids movement or shaking that affects the internal structure stability of the compressor.

[0050] like Figures 1 to 3 As shown, the filter assembly further includes a crimping member 60. The crimping member 60 is connected to the connecting portion 22 to press the connecting portion 22 onto the supporting structure 50. In this way, the above arrangement of the crimping member 60 further ensures the stability of the filter structure 20, and prevents the filter structure 20 from being displaced due to vibration during the operation of the compressor, and even affects the filtering effect.

[0051] In this embodiment, the crimping member 60 is a circular ring, the connecting portion 22 is annular, and the circular ring is pressed tightly on the connecting portion 22. The crimping member 60 and the supporting structure 50 are respectively located on both sides of the connecting portion 22 to clamp the connecting portion 22.

[0052] like Figures 2 to 5As shown, the support structure 50 has a support protrusion 51 and an oil return portion 52, wherein the support protrusion 51 protrudes toward the filter portion 21 to support the filter portion 21. The oil attached to the filter portion 21 flows into the compressor oil pool 80 through the oil return portion 52. Thus, the above-mentioned setting of the oil return portion 52 promotes the reflux of the lubricating oil, so that the lubricating oil after the oil-gas separation is returned to the compressor oil pool 80, thereby ensuring the lubrication inside the compressor, reducing the operating noise, and extending the service life of the compressor.

[0053] In this embodiment, the center of the support structure 50 is convex upward to form a state where the center is high and the edge is low.

[0054] Optionally, there is one oil return portion 52 and it is located on one side of the supporting protrusion 51; or, there are multiple oil return portions 52, and the multiple oil return portions 52 are arranged at intervals around the supporting protrusion 51. In this way, the above arrangement makes the number selection and arrangement of the oil return portions 52 more flexible to meet different usage requirements and working conditions, and also improves the processing flexibility of the staff.

[0055] In this embodiment, there are eight oil return parts 52, and the eight oil return parts 52 are evenly distributed around the circumference of the supporting protrusion 51, thereby increasing the oil return efficiency of the oil return part 52, ensuring that the lubricating oil after the oil and gas separation is returned to the compressor oil pool 80 through the oil return part 52, so as to realize the reuse of the lubricating oil.

[0056] It should be noted that the number of the oil return parts 52 is not limited thereto and can be adjusted according to working conditions and usage requirements. Optionally, the number of the oil return parts 52 is two, three, four, five, six, seven, nine, ten, or more.

[0057] like Figures 2 to 5 As shown, the support structure 50 also has a through hole 53, and the oil return portion 52 is arranged on a part of the hole wall of the through hole 53 to form an oil flow space 54 around another part of the hole wall of the through hole 53. Among them, at least part of the oil return portion 52 extends toward the side away from the support protrusion 51. In this way, the above-mentioned setting of the oil return portion 52 not only ensures the smooth return of the oil, but also optimizes the oil circuit inside the compressor and improves the circulation efficiency of the oil. At the same time, at least part of the oil return portion 52 extending toward the side away from the support protrusion 51 can guide the lubricating oil so that the lubricating oil can flow back to the compressor oil pool 80 under the action of its own weight without adding an additional power device, thereby reducing the energy consumption of the compressor.

[0058] In this embodiment, the lubricating oil after oil-gas separation first enters the partial through hole 53, then enters the oil passage space 54, and finally flows back to the compressor oil pool 80 along the oil return portion 52 under the action of its own weight to achieve the recycling of the lubricating oil.

[0059] like Figures 2 to 5 As shown, the surface of the oil return portion 52 facing the filter portion 21 is a spherical surface, and the spherical surface is convex toward the side away from the filter portion 21. In this way, the above-mentioned setting of the spherical surface can effectively guide the flow direction of the lubricating oil, avoid the accumulation of the lubricating oil on the filter portion 21, improve the reflux efficiency of the lubricating oil, and also help to reduce the oil consumption inside the compressor and reduce the operating cost.

[0060] like Figures 2 to 5 As shown, the support structure 50 includes a panel 55 and a support plate 56. The panel 55 is connected to the casing 10, and the support plate 56 is arranged on the panel 55. The middle part of the support plate 56 protrudes toward the filter part 21 to form a support protrusion 51. The through hole 53 and the oil return part 52 are both arranged on the support plate 56 around the support protrusion 51. In this way, the above-mentioned setting of the support structure 50 not only ensures the stability of the filter structure 20, but also optimizes the internal structure of the compressor, improves the reflux efficiency of the oil, and reduces the operating noise. At the same time, the above-mentioned setting makes the structure of the support structure 50 simpler, easier to process and realize, and reduces the processing cost and difficulty of the support structure 50.

[0061] In this embodiment, the enclosure 55 is welded to the inner surface of the casing 10, and the support plate 56 and the crimping piece 60 press the connecting portion 22. The orthographic projection of the oil return portion 52 on the filter portion 21 is located inside the filter portion 21 to ensure that the lubricating oil after oil-liquid separation can flow back to the compressor oil pool 80 through the oil return portion 52.

[0062] In this embodiment, the working principle of the filtering component is as follows:

[0063] The oil and refrigerant mixture, including the lubricating oil directly discharged from the pump body assembly 30, the oil and refrigerant mixture discharged from the muffler exhaust port of the pump body assembly 30, and the lubricating oil brought by the oil pool fluctuation caused by the vortex in the lower chamber of the motor, flows upward from the motor rotor flow hole and the stator-rotor gap, enters the upper chamber of the motor, and passes through the filter assembly in sequence. When the oil and refrigerant mixture collides with the filter structure 20, an obvious oil-gas separation effect will be generated, wherein the gaseous refrigerant flows upward directly through the filter structure 20 and is discharged through the exhaust pipe 40, and the liquid lubricating oil flows outward along the mesh wall of the filter structure 20 and the wall surface of the support structure 50, and is discharged to the inner outer circle side of the casing 10 through the oil return portion 52, and flows back to the compressor oil pool 80 along the stator trim gap, thereby greatly reducing the oil discharge rate of the compressor.

[0064] like Figure 1As shown, the present application also provides a compressor, including a casing 10, a pump assembly 30, an exhaust pipe 40 and a filter assembly, wherein the casing 10 has an exhaust port 11, an end of the exhaust pipe 40 extends into the exhaust port 11, and the pump assembly 30 and the filter assembly are both arranged in the casing 10. Among them, the filter assembly is the above-mentioned filter assembly.

[0065] Specifically, the filter assembly is installed in the housing 10, the housing 10 has an exhaust port 11, and the filter assembly includes a filter structure 20, the filter structure 20 is located between the pump body assembly 30 and the exhaust port 11 and includes a filter portion 21 and a connecting portion 22 connected to each other, the connecting portion 22 is arranged around the filter portion 21, and at least part of the filter portion 21 protrudes away from the pump body assembly 30. In this way, since the filter assembly is installed in the housing 10 and is located between the pump body assembly 30 and the exhaust port 11, the oil and gas can be separated from the final exhaust flow channel of the compressor, so as to greatly reduce the oil discharge rate of the compressor from the final exhaust flow channel, ensure the operating reliability of the compressor, reduce the friction power consumption of the compressor, and improve the working performance of the compressor, thereby solving the problem of high oil discharge rate of the compressor when operating at high speed or using R290 refrigerant in the prior art.

[0066] like Figure 1 As shown, the casing 10 includes a casing body 12 and an upper cover 13. The upper cover 13 is arranged on the casing body 12, and the upper cover 13 has an exhaust port 11. The filter assembly is arranged on the casing body 12. In this way, the above arrangement optimizes the internal structure of the compressor, makes the disassembly and assembly of the filter assembly more convenient, and also ensures the stability of the filter assembly and improves the filtering effect.

[0067] In other embodiments not shown in the drawings, the filter assembly is disposed on the housing body and the upper cover to improve the oil-gas separation efficiency of the filter assembly and further reduce the oil discharge rate of the compressor.

[0068] like Figure 1 As shown, the compressor also includes a stator assembly 70. The stator assembly 70 is arranged in the casing 10, and the filter assembly is located above the stator assembly 70. Among them, the filter assembly is arranged on the shell body 12, and there is a first distance L1 between the lower end face of the filter assembly and the upper end face of the stator assembly 70, and there is a second distance L2 between the upper end face of the crimping part 60 of the filter assembly and the inner top face of the upper cover 13, and the first distance L1 is greater than the second distance L2. In this way, by controlling the relationship between the first distance L1 and the second distance L2, the airflow distribution inside the compressor can be optimized and the oil-gas separation efficiency can be improved. At the same time, the above-mentioned setting ensures the cavity volume between the motor and the filter assembly to avoid excessive pressure loss due to too small volume.

[0069] Optionally, the compressor is a vertical rotor compressor.

[0070] Optionally, the compressor is a vertical scroll compressor, and the filter assembly is installed above the scroll plate, and a sufficient cavity volume is reserved.

[0071] Embodiment 2

[0072] The difference between the filter assembly in the second embodiment and the first embodiment is that the installation position of the filter structure 20 is different.

[0073] like Figure 6 As shown, the filter assembly is arranged on the upper cover 13, and at least part of the filter portion 21 protrudes toward the pump body assembly 30. In this way, the above arrangement of the filter assembly can separate oil and gas in the final exhaust flow channel of the compressor, so as to significantly reduce the oil discharge rate of the compressor from the final exhaust flow channel, ensure the operating reliability of the compressor, reduce the friction power consumption of the compressor, and improve the working performance of the compressor, thereby solving the problem of high oil discharge rate of the compressor in the prior art when operating at high speed or using R290 refrigerant.

[0074] In this embodiment, the crimping member 60 is connected to the connecting portion 22 to press the connecting portion 22 against the housing 10. Thus, the arrangement of the crimping member 60 further ensures the stability of the filter structure 20, preventing the filter structure 20 from being displaced due to vibration during the operation of the compressor, and even affecting the filtering effect.

[0075] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0076] The filter assembly is installed in the casing of the compressor, the casing has an exhaust port, the filter assembly includes a filter structure, the filter structure is located between the pump body assembly and the exhaust port of the compressor, the filter structure includes a filter part and a connecting part connected to each other, the connecting part is arranged around the filter part, and at least part of the filter part protrudes toward or away from the pump body assembly. In this way, since the filter assembly is installed in the casing and is located between the pump body assembly and the exhaust port, the oil and gas can be separated in the final exhaust flow channel of the compressor, so as to greatly reduce the oil discharge rate of the compressor from the final exhaust flow channel, ensure the operating reliability of the compressor, reduce the friction power consumption of the compressor, and improve the working performance of the compressor, thereby solving the problem of high oil discharge rate of the compressor when operating at high speed or using R290 refrigerant in the prior art.

[0077] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0078] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0079] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A filter assembly installed in a casing (10) of a compressor, wherein the casing (10) has an exhaust port (11), characterized in that: The filter assembly comprises: A filter structure (20) is located between a pump body assembly (30) and an exhaust port (11) of the compressor, wherein the filter structure (20) comprises a filter portion (21) and a connecting portion (22) which are connected to each other, wherein the connecting portion (22) is arranged around the filter portion (21), and at least a portion of the filter portion (21) protrudes toward or away from the pump body assembly (30).

2. The filter assembly according to claim 1, characterized in that: Along the direction S from the middle to the edge of the filter portion (21), the vertical distance h between the filter portion (21) and the surface where the exhaust port (11) is located gradually decreases.

3. The filter assembly according to claim 1, characterized in that: There is a preset distance H between the end of the exhaust pipe (40) extending into the exhaust port (11) and the middle of the filter portion (21), and the preset distance H is greater than or equal to 3 mm.

4. The filter assembly according to claim 1, characterized in that: The filter portion (21) is a conical surface or a spherical surface; and / or the filter portion (21) is a filter screen.

5. The filter assembly according to claim 1, characterized in that: The filter assembly also includes: a supporting structure (50), the supporting structure (50) being located below the filtering structure (20) so as to support the filtering structure (20); Wherein, the support structure (50) is welded, or clamped, or connected to the inner surface of the casing (10) via fasteners.

6. The filter assembly according to claim 5, characterized in that The filter assembly also includes: A crimping piece (60) connected to the connecting portion (22) to press the connecting portion (22) onto the housing (10) or the supporting structure (50).

7. The filter assembly according to claim 5, characterized in that: The support structure (50) comprises a support protrusion (51) and an oil return portion (52), wherein the support protrusion (51) protrudes toward the filter portion (21) so as to support the filter portion (21); wherein the oil attached to the filter portion (21) flows into the compressor oil pool (80) through the oil return portion (52).

8. The filter assembly according to claim 7, characterized in that: There is one oil return portion (52) located on one side of the supporting protrusion (51); or there are multiple oil return portions (52), which are arranged at intervals around the supporting protrusion (51).

9. The filter assembly according to claim 7, characterized in that: The support structure (50) further comprises a through hole (53), and the oil return portion (52) is arranged on a portion of the hole wall of the through hole (53) so as to form an oil flow space (54) around another portion of the hole wall of the through hole (53); wherein at least a portion of the oil return portion (52) extends toward a side away from the support protrusion (51).

10. The filter assembly according to claim 7, characterized in that: The surface of the oil return portion (52) facing the filter portion (21) is a spherical surface, and the spherical surface is convex toward a side away from the filter portion (21).

11. The filter assembly according to claim 9, characterized in that The support structure (50) comprises: A surrounding plate (55) connected to the casing (10); A support plate (56) is arranged on the enclosure plate (55), and a middle portion of the support plate (56) protrudes toward the filter portion (21) to form the support protrusion (51); the through hole (53) and the oil return portion (52) are both arranged on the support plate (56) around the support protrusion (51).

12. A compressor, characterized in that: The invention comprises a casing (10), a pump body assembly (30), an exhaust pipe (40) and a filter assembly, wherein the casing (10) has an exhaust port (11), an end of the exhaust pipe (40) extends into the exhaust port (11), and the pump body assembly (30) and the filter assembly are both arranged in the casing (10); wherein the filter assembly is the filter assembly according to any one of claims 1 to 11.

13. The compressor according to claim 12, characterized in that The housing (10) comprises: Shell body (12); An upper cover (13) is disposed on the housing body (12), and the upper cover (13) has the exhaust port (11); Wherein, the filter assembly is arranged on the shell body (12) and / or the upper cover (13).

14. The compressor according to claim 13, characterized in that The compressor also includes: A stator assembly (70) is disposed in the housing (10), and the filter assembly is located above the stator assembly (70); The filter assembly is arranged on the shell body (12), a first distance L1 is defined between the lower end surface of the filter assembly and the upper end surface of the stator assembly (70), a second distance L2 is defined between the upper end surface of the crimping part (60) of the filter assembly and the inner top surface of the upper cover (13), and the first distance L1 is greater than the second distance L2.

Images