Compressor

Abstract

The utility model relates to the technical field of compressors, and particularly discloses a compressor which is provided with a closed cavity, an oil storage pool for storing lubricating oil is arranged at the bottom of the closed cavity, an oil discharge valve is arranged on the side portion of the compressor, the oil discharge valve is communicated with the closed cavity through an oil guide pipe, and a bent portion is arranged on the oil guide pipe. And the lower end of the oil guide pipe is close to the bottom of the closed cavity. During oil discharge, the oil discharge valve can be opened to be communicated with external oil suction equipment, the oil guide pipe and the oil discharge valve can form a continuous oil conveying path, oil at the bottom of the closed cavity flows out of the closed cavity after passing through the oil guide pipe and the oil discharge valve, residual oil at the bottom of the closed cavity is reduced, the mixing condition of the residual oil in the closed cavity and new oil is reduced, and the service life of the closed cavity is prolonged. And the lubricating effect is ensured.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and in particular to a compressor. Background Technology

[0002] In related technologies, the compressor includes a housing with an oil chamber for storing lubricating oil. An oil drain valve is provided on the side of the housing and is connected to the oil chamber. The oil drain valve needs to be located on the side of the oil chamber and needs to be higher than the lowest liquid level of the oil chamber to reduce excessive leakage of oil from the oil drain valve during operation and ensure the effectiveness of lubrication of key components such as bearings and scrolls.

[0003] However, during compressor maintenance, the oil in the oil chamber of the casing needs to be drained through the drain valve. The oil in the oil chamber can only be drained to the minimum level, and it is difficult to drain it all, which will lead to oil mixing and reduce the lubrication effect when it is put back into operation. Utility Model Content

[0004] The purpose of this utility model is to provide a compressor that solves the problem in related technologies where the oil drain valve of the compressor needs to be set above the lowest liquid level in the oil chamber, making it difficult to drain all the oil during maintenance and easily leading to oil mixing.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] This utility model provides a compressor having a closed cavity, the bottom of which has an oil reservoir for storing lubricating oil, and an oil drain valve provided on the side of the compressor. The oil drain valve is connected to the closed cavity through an oil guide pipe, and the oil guide pipe has a bend so that the lower end of the oil guide pipe approaches the bottom of the closed cavity.

[0007] In one embodiment, the drain valve includes:

[0008] The valve body has a flow channel and an abutment portion located within the flow channel;

[0009] A valve core is disposed within the flow channel. The valve core includes a plunger, a valve plate fixedly disposed on the plunger, and an elastic element sleeved on the plunger. The valve plate is located on the side of the abutment portion near the oil guide tube. The elastic element is disposed between the plunger and the valve body, and the elastic element is used to apply an elastic pulling force to the plunger toward the abutment portion so that the valve plate abuts against the abutment portion to close the flow channel.

[0010] When the external force applied to the plunger can overcome the elastic tension applied to the plunger by the elastic element, the plunger slides axially relative to the valve body, and the plunger drives the valve plate away from the abutment portion to open the flow channel.

[0011] In one embodiment, the drain valve further includes a valve cap, which is detachably connected to the end of the valve body away from the oil guide pipe, and the valve cap is used to close the flow channel.

[0012] In one embodiment, the end of the oil guide pipe near the oil drain valve has a flared structure, and a connecting sleeve is circumferentially fitted on the flared structure. The connecting sleeve has a clamping part, and the connecting sleeve is detachably connected to the oil drain valve. The connecting sleeve presses the inner wall of the flared structure against the surface of the oil drain valve through the clamping part.

[0013] In one embodiment, the inner wall of the flared structure and the oil drain valve are sealed by a line or a surface seal.

[0014] In one embodiment, the compressor includes a housing, the enclosed cavity is the inner cavity of the housing, and the outer periphery of the oil drain valve is provided with a protrusion. When the connecting sleeve is connected to the oil drain valve, the protrusion and the connecting sleeve are respectively located on the inner and outer sides of the housing. The protrusion abuts against the outer wall of the housing, and the connecting sleeve abuts against the inner wall of the housing.

[0015] In one embodiment, the oil conduit has at least two oil inlet channels, and the at least two oil inlet channels are located at different positions near the bottom of the enclosed cavity.

[0016] In one embodiment, the compressor further includes a positioning seat, which is fixedly disposed in the enclosed cavity. The positioning seat has a positioning groove on its side, which extends vertically. The oil guide pipe is engaged with the positioning seat through the positioning groove.

[0017] In one embodiment, the oil guide tube is a rigid pipe.

[0018] In one embodiment, the lower end of the oil guide tube abuts against the bottom of the enclosed cavity; or,

[0019] The height difference between the lower end of the oil guide pipe and the bottom of the enclosed cavity is equal to or less than 20 mm.

[0020] The beneficial effects of this utility model are as follows:

[0021] This utility model provides a compressor that includes an oil discharge valve and an oil guide pipe. The oil discharge valve is connected to a closed cavity via the oil guide pipe, which has a bend so that its lower end approaches the bottom of the closed cavity. The inner cavity of the oil guide pipe and the inner cavity of the oil discharge valve can form a continuous oil delivery path. The oil at the bottom of the closed cavity flows out of the closed cavity through the oil guide pipe and the oil discharge valve, reducing the amount of oil residue at the bottom of the closed cavity and improving the oil discharge effect. This reduces the mixing of residual oil and new oil in the closed cavity, ensuring a good lubrication effect. Attached Figure Description

[0022] Figure 1 This is an exploded view of the oil discharge valve and oil guide pipe of the compressor in an embodiment of this utility model;

[0023] Figure 2 This is a cross-sectional view of the oil discharge valve and oil guide pipe of the compressor in an embodiment of this utility model;

[0024] Figure 3 This is a cross-sectional view of the oil drain valve in an embodiment of this utility model;

[0025] Figure 4 This is a schematic diagram of the connection structure of the positioning seat of the compressor in an embodiment of this utility model;

[0026] Figure 5 This is a schematic diagram of the external structure of the compressor in an embodiment of this utility model;

[0027] Figure 6 This is a schematic diagram showing the positional relationship between the positioning seat, the oil guide pipe, and the oil drain valve in an embodiment of this utility model.

[0028] In the picture:

[0029] 1. Oil drain valve;

[0030] 11. Valve body; 111. Flow channel; 112. Abutment part; 113. Protrusion;

[0031] 12. Valve core; 121. Piston; 122. Valve plate; 123. Elastic element;

[0032] 13. Valve cap;

[0033] 2. Oil guide tube; 21. Bend; 22. Flared mouth structure; 23. Connecting sleeve; 231. Clamping part;

[0034] 3. Shell; 31. Enclosed cavity;

[0035] 4. Positioning seat; 41. Positioning groove;

[0036] 5. Bottom bearing. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0038] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0041] like Figures 1 to 3 As shown, an embodiment of this utility model provides a compressor having a closed cavity 31. The bottom of the closed cavity 31 has an oil reservoir for storing lubricating oil. An oil drain valve 1 is provided on the side of the compressor. The oil drain valve 1 is connected to the closed cavity 31 through an oil guide pipe 2. The oil guide pipe 2 has a bend 21 so that the lower end of the oil guide pipe 2 approaches the bottom of the closed cavity 31, so as to provide a conveying path for the oil at the bottom of the closed cavity 31, so that the oil in the oil reservoir can be discharged from the oil drain valve 1 through the oil guide pipe 2.

[0042] With this configuration, when the oil in the closed cavity 31 needs to be discharged, the oil drain valve 1 can be opened to connect with the external oil suction equipment. The inner cavity of the oil guide pipe 2 and the inner cavity of the oil drain valve 1 can form a continuous oil delivery path. The oil at the bottom of the closed cavity 31 flows out of the closed cavity 31 after passing through the oil guide pipe 2 and the oil drain valve 1, reducing the residual oil at the bottom of the closed cavity 31 and improving the oil discharge effect. This reduces the mixing of residual oil and new oil in the closed cavity 31, ensuring the lubrication effect. It solves the problem in related technologies where the oil drain valve 1 of the compressor needs to be set above the lowest liquid level in the oil cavity, making it difficult to completely drain the oil during maintenance and easily leading to oil mixing.

[0043] In this embodiment, when the closed cavity 31 does not need to drain oil but supplies oil normally, the liquid level in the oil guide pipe 2 can be equal to or lower than the oil level in the closed cavity 31, and the liquid level in the drain valve 1 can be higher than the lowest liquid level in the closed cavity 31.

[0044] Optionally, the inner cavity of the oil guide pipe 2 may be, but is not limited to, an inclined straight channel, an arc-shaped channel or a spiral channel, as long as it can guide the oil at the bottom of the closed cavity 31 to the oil drain valve 1.

[0045] like Figures 1 to 3 As shown, in some embodiments, the drain valve 1 includes a valve body 11 and a valve core 12. The valve body 11 has a flow channel 111 and an abutment portion 112 located within the flow channel 111. The valve core 12 is disposed within the flow channel 111 and includes a plunger 121, a valve plate 122 fixedly disposed on the plunger 121, and an elastic member 123 sleeved on the plunger 121. The valve plate 122 is located on the side of the abutment portion 112 near the oil guide pipe 2. The elastic member 123 is disposed between the plunger 121 and the valve body 11, and the elastic member 123 is used to apply an elastic pulling force to the plunger 121 toward the abutment portion 112 so that the valve plate 122 abuts against the abutment portion 112 to close the flow channel 111.

[0046] When the external force applied to the plunger 121 can overcome the elastic tension exerted by the elastic element 123 on the plunger 121, the plunger 121 slides axially relative to the valve body 11, and the plunger 121 drives the valve plate 122 away from the abutment portion 112 to open the flow channel 111. In this embodiment, the drain valve 1 can be a normally closed valve. When draining is not required, the valve plate 122, under the elastic tension of the elastic element 123, abuts against the abutment portion 112 to close the flow channel 111, maintaining the sealing of the drain valve 1 and reducing oil leakage. When draining is required, the drain valve 1 can be opened to connect with an external oil suction device. The external oil suction device can apply an external force to the plunger 121 of the drain valve 1 to overcome the elastic tension exerted by the elastic element 123 on the plunger 121, thereby causing the plunger 121 to move and drive the valve plate 122 to open the flow channel 111, facilitating smooth oil flow.

[0047] In this embodiment, the abutment portion 112 may be, but is not limited to, a groove or a protrusion, and can be disposed on the inner wall of the flow channel 111 for the valve plate 122 to abut against, as long as it can seal the flow channel 111. At least the portion of the abutment portion 112 that abuts against the valve plate 122 is elastic, which facilitates the elastic abutment portion 112 and the valve plate 122 to abut against each other and improves the sealing performance. For example, the portion of the abutment portion 112 that abuts against the valve plate 122 may be a coating of elastic material or an elastic gasket.

[0048] like Figures 1 to 3 As shown, in some embodiments, the drain valve 1 further includes a valve cap 13, which is detachably connected to the end of the valve body 11 away from the oil guide pipe 2. The valve cap 13 is used to close the flow channel 111, which can shield and protect the valve core 12 in the flow channel 111, reduce damage from foreign objects or accidental triggering, and also improve the sealing of the outlet position of the flow channel 111, reducing the entry of foreign objects.

[0049] like Figures 1 to 3 As shown, in some embodiments, the end of the oil guide pipe 2 near the oil drain valve 1 is a flared structure 22. A connecting sleeve 23 is circumferentially fitted on the flared structure 22, and the connecting sleeve 23 has a clamping part 231. The connecting sleeve 23 is detachably connected to the oil drain valve 1. When the connecting sleeve 23 is connected to the oil drain valve 1, the connecting sleeve 23 presses the inner wall of the flared structure 22 against the surface of the oil drain valve 1 through the clamping part 231. The inner wall of the flared structure 22 is a conical surface, and the inner wall of the flared structure 22 can fit tightly against the surface of the oil drain valve 1. The large contact area improves the sealing performance at the connection between the oil guide pipe 2 and the oil drain valve 1, reduces oil leakage at the transition position between the oil guide pipe 2 and the oil drain valve 1, and is easy to install and has a small size.

[0050] Optionally, the connection between the connecting sleeve 23 and the valve body 11 can be, but is not limited to, a threaded connection, a snap-fit ​​connection, or a magnetic connection. For example, the connection between the connecting sleeve 23 and the valve body 11 can be a threaded connection. During the screwing of the connecting sleeve 23 onto the valve body 11, the clamping part 231 can gradually approach and press the flared structure 22 against the valve body 11. The threaded connection between the connecting sleeve 23 and the valve body 11 can be locked, improving the sealing stability of the mating point between the flared structure 22 and the valve body 11.

[0051] like Figures 1 to 3As shown, in some embodiments, the inner wall of the flared structure 22 and the valve body 11 form a line seal or a surface seal. Optionally, when the inner wall of the flared structure 22 and the valve body 11 form a line seal, the sealing contact area is linear or narrow strip-shaped, with high unit pressure and good sealing effect. For example, it can be formed by directly abutting a portion of the inner wall of the flared structure 22 against the valve body 11, or one or more sealing rings can be provided between the flared structure 22 and the valve body 11, forming a line seal through elastic abutment of the sealing rings. Optionally, when the inner wall of the flared structure 22 and the valve body 11 form a surface seal, the contact area is large, the sealing pressure distribution is uniform, and the sealing effect is stable. For example, the inner wall of the flared structure 22 can be provided with a large taper, and most of the inner wall surface of the flared structure 22 can fit against the surface of the valve body 11. Alternatively, an elastic gasket can be provided between the inner wall of the flared structure 22 and the valve body 11, allowing the surfaces of the two to elastically abut against each other. Of course, without the flared structure 22, the end of the oil guide pipe 2 near the valve body 11 can be directly connected to the end of the valve body 11 using a flange connection structure, which can also achieve a sealed connection between the oil guide pipe 2 and the valve body 11.

[0052] Specifically, the flared structure 22 may include at least one stepped pipe segment. When there are at least two stepped pipe segments, the at least two stepped pipe segments are connected in series along the axial direction. In any two adjacent stepped pipe segments, the diameter of the stepped pipe segment closer to the valve body 11 is larger than the diameter of the stepped pipe segment farther from the valve body 11. At least a portion of the inner wall of the at least two stepped pipe segments abuts against the valve body 11. That is, the flared structure 22 can gradually expand outward by connecting the stepped pipe segments in series. The inner wall of the stepped pipe segment has a large abutting contact area with the valve body 11 and can form a bent multi-angle contact surface, further improving the sealing performance at the connection between the oil guide pipe 2 and the valve body 11. The wall surface of each stepped pipe segment along its own axial direction can be a conical surface to facilitate abutting and fitting with the valve body 11.

[0053] In this embodiment, the inner wall of at least a portion of at least two stepped pipe sections abutting against the valve body 11 means that at least one stepped groove can be provided on the outer periphery of the valve body 11. The number of stepped grooves is the same as the number of stepped pipe sections, and the positions of the stepped grooves and stepped pipe sections are arranged in a one-to-one correspondence. The cross-sectional profile of the inner wall of the flared structure 22 is the same as the cross-sectional profile of the outer wall of the valve body 11. When the flared structure 22 abuts against the valve body 11, the inner wall of at least a portion of at least two stepped pipe sections can fit and abut against the groove wall of the corresponding stepped groove for sealing.

[0054] like Figures 1 to 4As shown, in some embodiments, the compressor includes a housing 3, and the enclosed cavity 31 is the inner cavity of the housing 3. The outer periphery of the valve body 11 is provided with a protrusion 113. When the connecting sleeve 23 is connected to the valve body 11, the protrusion 113 and the connecting sleeve 23 are respectively located on the inner and outer sides of the housing 3. The protrusion 113 abuts against the outer wall of the housing 3, and the connecting sleeve 23 abuts against the inner wall of the housing 3. With this arrangement, the valve body 11 can be inserted into the corresponding hole of the housing 3. Then, while the connecting sleeve 23 is connected and fixed to the valve body 11, a limiting groove can also be formed. The protrusion 113 and the connecting sleeve 23 are respectively located on the inner and outer sides of the housing 3 to limit the housing 3 to abut and limit it within the limiting groove, ensuring the stability of the connection position of the oil discharge valve 1, thereby reducing displacement.

[0055] The protrusion 113 may be, but is not limited to, a protrusion or an annular flange, as long as it can limit the movement of external equipment.

[0056] In some embodiments, the oil guide pipe 2 has at least two oil inlet channels, which are located at different positions near the bottom of the closed cavity 31, forming a multi-point common oil discharge, which can not only improve the oil discharge efficiency, but also reduce the oil residue caused by the unevenness of the bottom of the closed cavity 31.

[0057] like Figures 2 to 6 As shown, in some embodiments, the compressor also includes a positioning seat 4, with a positioning groove 41 on the side of the positioning seat 4. The positioning seat 4 is fixedly installed in the closed cavity 31, and the oil guide pipe 2 is engaged with the positioning seat 4 through the positioning groove 41. With this arrangement, the positioning seat 4 is fixedly mounted in the closed cavity 31. The positioning seat 4 and the oil discharge valve 1 can position the oil guide pipe 2 at different positions respectively, which can improve the positional stability of the oil guide pipe 2 and reduce displacement.

[0058] The oil guide pipe 2 can be engaged with the positioning seat 4 via the positioning groove 41, and extends downwards along the extension direction of the positioning groove 41 to the bottom of the closed cavity 31. This can block both sides of the oil guide pipe 2, reducing the possibility of the oil guide pipe 2 rotating and loosening at the connection position with the oil drain valve 1, and reducing the possibility of the oil guide pipe 2 shifting due to oil flow inside the oil guide pipe 2, thereby improving the stability of the oil guide pipe 2 at the bottom of the closed cavity 31. When there are multiple oil guide pipes 2, there can also be multiple positioning grooves 41. The number of positioning grooves 41 is the same as the number of oil guide pipes 2, and the oil guide pipes 2 and positioning grooves 41 can be set one-to-one, which facilitates the individual positioning of the oil guide pipes 2.

[0059] Optionally, a bottom bearing 5 may be provided inside the enclosed cavity 31, and the positioning seat 4 may be mounted on the bottom bearing 5 to reduce space occupation and improve positional stability by relying on the bottom bearing 5. The positioning groove 41 may extend along the liquid level height direction of the enclosed cavity 31.

[0060] like Figures 2 to 5As shown, in some embodiments, the oil guide tube 2 is a rigid pipe, that is, the oil guide tube 2 can be a pipe made of a rigid material, such as stainless steel or aluminum. It has stable chemical properties and the oil guide tube 2 is not easily deformed. This makes it easy for the inlet of the oil guide tube 2 to be kept at the lowest position at the bottom of the closed cavity 31, reducing oil residue caused by positional displacement.

[0061] like Figures 1 to 3 As shown, in some embodiments, the lower end of the oil guide pipe 2 abuts against the bottom of the closed cavity 31 so that the lower end of the oil guide pipe 2 directly contacts the bottommost lubricating oil, which can still stably absorb oil under low oil level conditions and greatly reduce oil residue.

[0062] Alternatively, the height difference between the lower end of the oil guide pipe 2 and the bottom of the closed cavity 31 is equal to or less than 20 mm. By setting the height difference, when the compressor vibrates, the oil guide pipe 2 can be prevented from being damaged or displaced by high-frequency collision with the closed cavity 31 due to vibration impact. When the height difference is within 20 mm, the lower end of the oil guide pipe 2 can generate a certain degree of siphon effect downward. Although there is a certain distance, the oil guide pipe 2 can still effectively adsorb the oil at the bottom of the closed cavity 31. It can also avoid excessive intake of bottom deposited impurities by maintaining a certain distance, which makes it easier to treat impurities separately.

[0063] The smaller the height difference between the lower end of the oil guide pipe 2 and the bottom of the closed cavity 31, the better. This can be determined based on the difficulty of processing and assembly. For example, the height difference between the lower end of the oil guide pipe 2 and the bottom of the closed cavity 31 can be less than 30 mm.

[0064] like Figures 1 to 3 As shown, in some embodiments, the bend 21 is an arc-shaped pipe section, which facilitates the smooth flow of oil in the oil guide pipe 2 within the bend 21 and reduces flow resistance.

[0065] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A compressor having a closed cavity (31) at the bottom of which is an oil reservoir for storing lubricating oil, characterized in that, The compressor is provided with an oil drain valve (1) on its side. The oil drain valve (1) is connected to the closed cavity (31) through an oil guide pipe (2). The oil guide pipe (2) has a bend (21) so that the lower end of the oil guide pipe (2) approaches the bottom of the closed cavity (31).

2. The compressor according to claim 1, characterized in that, The oil drain valve (1) includes: The valve body (11) has a flow channel (111) and an abutment portion (112) located within the flow channel (111); A valve core (12) is disposed in the flow channel (111). The valve core (12) includes a plunger (121), a valve plate (122) fixedly disposed on the plunger (121), and an elastic element (123) sleeved on the plunger (121). The valve plate (122) is located on the side of the abutment portion (112) close to the oil guide pipe (2). The elastic element (123) is disposed between the plunger (121) and the valve body (11), and the elastic element (123) is used to apply an elastic pulling force to the plunger (121) toward the abutment portion (112) so that the valve plate (122) abuts against the abutment portion (112) to close the flow channel (111). When the external force applied to the plunger (121) can overcome the elastic tension applied to the plunger (121) by the elastic element (123), the plunger (121) slides axially relative to the valve body (11), and the plunger (121) drives the valve plate (122) away from the abutment portion (112) to open the flow channel (111).

3. The compressor according to claim 2, characterized in that, The drain valve (1) also includes a valve cap (13), which is detachably connected to the end of the valve body (11) away from the oil guide pipe (2), and the valve cap (13) is used to close the flow channel (111).

4. The compressor according to claim 1, characterized in that, The end of the oil guide pipe (2) near the oil drain valve (1) is a flared structure (22). A connecting sleeve (23) is circumferentially fitted on the flared structure (22), and the connecting sleeve (23) has a clamping part (231). The connecting sleeve (23) is detachably connected to the oil drain valve (1), and the connecting sleeve (23) presses the inner wall of the flared structure (22) onto the surface of the oil drain valve (1) through the clamping part (231).

5. The compressor according to claim 4, characterized in that, The inner wall of the flared structure (22) and the oil drain valve (1) are sealed by a line or a surface.

6. The compressor according to claim 4, characterized in that, The compressor includes a housing (3), the enclosed cavity (31) is the inner cavity of the housing (3), and the outer periphery of the oil drain valve (1) is provided with a protrusion (113). When the connecting sleeve (23) is connected to the oil drain valve (1), the protrusion (113) and the connecting sleeve (23) are respectively located on the inner and outer sides of the housing (3). The protrusion (113) abuts against the outer wall of the housing (3), and the connecting sleeve (23) abuts against the inner wall of the housing (3).

7. The compressor according to claim 1, characterized in that, The oil guide pipe (2) has at least two oil inlet channels, and the at least two oil inlet channels are located at different positions near the bottom of the closed cavity (31).

8. The compressor according to any one of claims 1-7, characterized in that, The compressor also includes a positioning seat (4), which is fixedly installed in the closed cavity (31). The positioning seat (4) has a positioning groove (41) on its side, and the oil guide pipe (2) is engaged with the positioning seat (4) through the positioning groove (41).

9. The compressor according to claim 8, characterized in that, The oil guide pipe (2) is a rigid pipe.

10. The compressor according to any one of claims 1-7, characterized in that, The lower end of the oil guide pipe (2) abuts against the bottom of the closed cavity (31); or, The height difference between the lower end of the oil guide pipe (2) and the bottom of the closed cavity (31) is equal to or less than 20 mm.

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