CN116816679A

CN116816679A - compressor

Info

Publication number: CN116816679A
Application number: CN202211331048.1A
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Hangzhou Lvneng New Energy Auto Parts Co ltd
Current assignee: Hangzhou Lvneng New Energy Auto Parts Co ltd
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2023-09-29

Abstract

The application provides a compressor, which comprises a fixed scroll, a movable scroll and an exhaust cover, wherein the fixed scroll is provided with a plurality of air inlets; the compressor is provided with a compression cavity and a high-pressure cavity, the compression cavity is positioned between the fixed scroll and the movable scroll, and the high-pressure cavity is positioned between the fixed scroll and the exhaust cover; the compressor is provided with an oil return channel, the exhaust cover is provided with a cavity, the fixed scroll comprises a first spiral wall and a first end plate, the movable scroll comprises a second end plate, one end of the first spiral wall, which is far away from the first end plate, is at least partially in contact fit with the second end plate, the oil return channel is positioned on the fixed scroll, an inlet of the oil return channel is communicated with the cavity, an outlet of the oil return channel is positioned at one end of the first spiral wall, which is far away from the first end plate, and the outlet of the oil return channel can be communicated with the compression cavity. The outlet of the oil return channel can be communicated with the compression cavity, namely, lubricating oil can be rapidly distributed to the contact part between the fixed vortex disc and the movable vortex disc in the oil return process through the oil return channel arranged on the fixed vortex disc, so that the lubricating effect is improved.

Description

Compressor

Technical Field

The application relates to the technical field of compressors, in particular to a compressor.

Background

The compressor assembly structure comprises a movable scroll, a fixed scroll, an exhaust cover and a bearing seat, and the compressor is provided with a low-pressure cavity, a compression cavity, a back pressure cavity and a high-pressure cavity. Due to the high speed operation of the scrolls, adequate lubrication between the scrolls is a primary task. The lubrication mode of the scroll of the compressor in the related art is as follows: after the gas and the lubricating oil in the high-pressure cavity are separated, the lubricating oil is led into the low-pressure cavity, and then the sucked gas is continuously mixed with the lubricating oil to flow between the movable vortex disc and the fixed vortex disc, so that lubrication is realized, but the problems are that: the lubrication is realized only by the gas mixed oil flowing between the movable vortex disk and the fixed vortex disk, so that the quantity of the lubricating oil entering the position is small; lubricating oil after oil-gas separation cannot be timely and rapidly distributed between the movable vortex disc and the fixed vortex disc.

Disclosure of Invention

The application provides a compressor, which can distribute lubricating oil between a fixed scroll and an movable scroll to improve the lubricating effect.

The application provides a compressor, which comprises a fixed scroll, a movable scroll and an exhaust cover, wherein the fixed scroll is provided with a plurality of air inlets; the compressor is provided with a compression cavity and a high-pressure cavity, the compression cavity is positioned between the fixed scroll and the movable scroll, and the high-pressure cavity is positioned between the fixed scroll and the exhaust cover;

the compressor is provided with an oil return channel, the exhaust cover is provided with a cavity, the fixed scroll comprises a first spiral wall and a first end plate, the movable scroll comprises a second end plate, one end of the first spiral wall, which is far away from the first end plate, is at least partially contacted and matched with the second end plate, the oil return channel is positioned on the fixed scroll, an inlet of the oil return channel is communicated with the cavity, an outlet of the oil return channel is positioned at one end of the first spiral wall, which is far away from the first end plate, and the outlet of the oil return channel can be communicated with the compression cavity.

The outlet of the oil return channel can be communicated with the compression cavity, namely, lubricating oil can be rapidly distributed to the contact part between the fixed vortex disc and the movable vortex disc in the oil return process through the oil return channel arranged on the fixed vortex disc, so that the lubricating effect is improved.

Drawings

FIG. 1 is a perspective view of a compressor according to the present invention;

FIG. 2 is a perspective cross-sectional view of a compressor according to the present invention;

FIGS. 3-6 are cross-sectional views of a second oil passage in various embodiments of the present invention;

FIG. 7 is a perspective cross-sectional view of the compressor of the present invention at the location of the oil return passage;

FIG. 8 is a perspective cross-sectional view of the compressor of the present invention at another view angle at the location of the oil return passage;

FIG. 9 is a cross-sectional view of the compressor of the present invention at the location of the oil return passage;

FIG. 10 is a perspective view of a fixed scroll in accordance with the present invention;

FIG. 11 is a perspective cross-sectional view of a fixed scroll in accordance with the present invention;

FIG. 12 is a perspective view of an orbiting scroll in accordance with the present invention;

FIG. 13 is an enlarged view of circle A of FIG. 12;

FIG. 14 is a perspective cross-sectional view showing a state where a fixed scroll and an orbiting scroll are engaged in the present invention;

fig. 15 is a cross-sectional view showing another state of cooperation of the fixed scroll and the orbiting scroll in the present invention;

FIG. 16 is a perspective view of an exhaust cover according to the present invention;

fig. 17 is a perspective cross-sectional view of the exhaust cover at the first oil passage position in the present invention;

FIG. 18 is a perspective cross-sectional view of the drain cover in the position of the oil guide channel in accordance with the present invention;

FIG. 19 is a perspective view of a main bearing housing according to the present invention;

FIG. 20 is a perspective view of the main bearing housing of the present invention from another perspective;

FIG. 21 is a perspective cross-sectional view of a main bearing housing in accordance with the present application;

FIG. 22 is a cross-sectional view of a compressor discharge oil separation structure in accordance with the present application;

FIG. 23 is an enlarged view of circle B of FIG. 22;

FIG. 24 is an exploded view of a portion of the compressor according to the present application;

FIG. 25 is an exploded view of a portion of the compressor from another perspective in accordance with the present application;

FIG. 26 is a cross-sectional view of a hollow cavity of the present application;

FIG. 27 is another angular cross-sectional view of a hollow cavity of the present application.

Detailed Description

For a better understanding of the technical solution of the present application, the following detailed description of the embodiments of the present application refers to the accompanying drawings.

It should be understood that the described embodiments are merely some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

As shown in fig. 1 and 2, the present application provides a compressor, which structurally comprises a fixed scroll 1, a movable scroll 2, a shell 3, an exhaust cover 4 and a main bearing housing 5; the fixed scroll 1 is matched with the movable scroll 2, the compressor is provided with a compression cavity 601, a back pressure cavity 602 and a low pressure cavity 603, the compression cavity 601 is positioned between the fixed scroll 1 and the movable scroll 2, the back pressure cavity 602 is positioned between the main bearing seat 5 and the movable scroll 2, and the low pressure cavity 603 is positioned between the shell 3 and the main bearing seat 5;

16-17, the exhaust cover 4 is provided with a first oil passage 401, and the main bearing housing 5 is provided with a second oil passage 501, as shown in FIGS. 2-6, wherein the first oil passage 401 is communicated with the second oil passage 501, and the second oil passage 501 is communicated with the back pressure cavity 602; the rotating shaft 7 is partially arranged on the main bearing seat 5, the rotating shaft 7 is provided with a third oil way 701, and the third oil way 701 is communicated with the back pressure cavity 602 and the low pressure cavity 603; as shown in fig. 12, the orbiting scroll 2 has a through hole 201, and the through hole 201 communicates the compression chamber 601 and the back pressure chamber 602.

The housing 3 is further provided with a stator 301 and a rotor 302 matched with the stator 301 (for simplicity and understanding, the stator 301 and the rotor 302 are omitted in fig. 2 and 7-9), the rotor 302 is matched with the rotating shaft 7, the stator 301 is electrically connected with an external power supply to obtain a power source, so that the rotor 302 drives the rotating shaft 7 to rotate, and the rotating shaft 7 drives the movable scroll 2 to eccentrically rotate through an eccentric shaft sleeve, so that compressed gas is matched with the fixed scroll 1. How to make the rotating shaft 7 drive the orbiting scroll 2 to rotate is a conventional technical means in the art, and will not be described herein.

In the working state of the compressor in this embodiment, the air suction port 303 of the casing 3 sucks the external air, drives the lubricating oil in the casing 3 to flow to the low-pressure cavity 603, and then flows from the low-pressure cavity 603 to the compression cavity 601, and compresses by matching the movable scroll 2 with the fixed scroll 1.

As shown in fig. 12-15, the fixed scroll 1 comprises a first end plate 106 and a first spiral wall 101, the movable scroll 2 comprises a second end plate 204 and a second spiral wall 202, a through hole 201 penetrates through the second end plate, and the through hole 201 is located at a root position adjacent to the second spiral wall 202.

As shown in fig. 14, in one embodiment, the compression chamber 601 includes at least a first compression chamber 6011 and a second compression chamber 6012, the first compression chamber 6011 is located at a central position of the compression chamber 601, the second compression chamber 6012 is located immediately outside the first compression chamber 6011, the third compression chamber 6013 is located outside the second compression chamber 6012 in a radial direction thereof, and the through-hole 201 communicates with the second compression chamber 6012.

In another embodiment, as shown in fig. 15, the second spiral wall 202 has a head end 203 located away from the center of the compression chamber 601, and when the head end 203 abuts against the first spiral wall 101, the compression chamber 601 includes a third compression chamber 6013, and the third compression chamber 6013 is located outside of the second compression chamber 6012.

In addition, as shown in fig. 2 to 9 and fig. 16 to 18, the exhaust cover 4 is connected with the fixed scroll 1; the compressor is provided with a high-pressure cavity 604, and the high-pressure cavity 604 is positioned between the exhaust cover 4 and the fixed scroll 1; the first end plate 106 has a discharge hole 102, the discharge hole 102 communicates with the first compression chamber 6011 and the high-pressure chamber 604, the discharge cover 4 has a cavity 402, the cavity 402 communicates with the high-pressure chamber 604, and an inlet of the first oil passage 401 communicates with the cavity 402.

The gas compressed by the first spiral wall 101 and the second spiral wall 202 in the compression cavity 601 flows into the high-pressure cavity 604 from the exhaust hole 102 in the middle of the fixed scroll 1, and the hole 4021 is formed in the side wall of the cavity 402, as shown in fig. 1 and 7, so that the high-pressure cavity 604 is communicated with the cavity 402, the gas flows into the cavity 402 to perform oil-gas separation, the separated gas is discharged from the exhaust pipe 4023 in the top of the cavity 402, and the lubricating oil is filtered to be accumulated at the bottom of the cavity 402 temporarily.

As shown in fig. 2 to 6, at this time, due to the communication between the first oil passage 401 and the cavity 402 and the communication between the first oil passage 401 and the second oil passage 501, the lubricating oil may be guided back in the following flow sequence: the lubricating oil in the back pressure chamber 602 flows partially through the through hole 201 to the compression chamber 601 while the other part flows partially through the third oil passage 701 communicating with the back pressure chamber 602 to the low pressure chamber 603, and flows from the cavity 402 to the first oil passage 401, the first oil passage 401 to the second oil passage 501, and the second oil passage 501 to the back pressure chamber 602.

In this process, the orbiting scroll 2 is eccentrically and rotatably engaged with the fixed scroll 1 to compress gas, and the gas flows from the low pressure chamber 603 to the position of the head end 203 of the second spiral wall 202 and enters through the gap between the head end 203 and the first spiral wall 101, and is then continuously compressed, and the gas pressure is also continuously increased and is highest when the gas is compressed to the middle position of the compression chamber 601, that is, the middle positions of the fixed scroll 1 and the orbiting scroll 2. Therefore, the compression chamber 601 is a high-pressure area, and the gas in the compression chamber 601 directly flows into the high-pressure chamber 604, so that the gas pressure in the high-pressure chamber 604 is also higher, together with the gas pressure in the cavity 402; the low pressure chamber 603 is a low pressure region because the air sucked from the outside is not compressed, and the back pressure chamber 602 is a high pressure region because the air pressure of the high pressure region is partially introduced into the back pressure chamber 602 due to the through hole 201, and the air pressure is higher than that of the low pressure chamber 603. (note that references to high pressure region, low pressure region, or high pressure, low pressure are made in the context of the pressure in the back pressure chamber 602, low pressure chamber 603, compression chamber 601, and high pressure chamber 604, for ease of description and understanding only.)

As shown in fig. 2-9, the specific ranges of the cavities are further described below, wherein the specific ranges and the positions of the compression cavities 601 are clear, namely, after the movable scroll 2 and the fixed scroll 1 are meshed, compressed gas enters from a gap between the head end 203 and the first spiral wall 101, and is discharged into the high-pressure cavity 604 from the exhaust hole 102 formed in the middle position of the fixed scroll 1 after being compressed; the high pressure chamber 604 is located between the exhaust cover 4 and the fixed scroll 1, the fixed scroll 1 is located in the exhaust cover 4, the exhaust cover 4 is connected to the casing 3 through bolts, meanwhile, the fixed scroll 1 is pressed and covered with the movable scroll 2, a sealing gasket (may be an O-ring or the like) is arranged at the position where the fixed scroll 1 is matched with the exhaust cover 4, so that the high pressure chamber 604 is separated from the back pressure chamber 602 and the low pressure chamber 603, and the gas in the high pressure chamber 604 can only enter the cavity 402.

The back pressure cavity 602 is located between the main bearing seat 5 and the movable vortex disc 2, wherein a sealing gasket (may be an O-ring or the like) is also arranged at the edge position where the end face of the movable vortex disc 2 abuts against the main bearing seat 5, and a shaft seal is arranged between the main bearing seat 5 and the rotating shaft 7, and communication between the back pressure cavity 602 and the rest of the cavities is realized through the through hole 201, the second oil circuit 501 and the third oil circuit 701, so that gas and lubricating oil can only travel along a specific path, and the situation that sucked gas and compressed gas are mixed does not occur. The low pressure chamber 603 is used for temporarily storing the sucked air, where the air pressure is low, and the sucked air can flow from the air guide holes 502 formed at the edge of the main bearing housing 5 to the compression chamber 601.

As shown in fig. 14 and 15, when gas passes through the gap between the first spiral wall 101 and the second spiral wall 202, the eccentrically rotating orbiting scroll 2 causes the second spiral wall 202 to continuously compress the gas entering in cooperation with the first spiral wall 101. The volume of the first compression chamber 6011 and the second compression chamber 6012 formed at least between the first spiral wall 101 and the second spiral wall 202 is changed continuously, and the pressure therein is also changed continuously, which is specifically as follows: when gas enters the compression chamber 601 from a gap position between the head end 203 and the side wall of the first spiral wall 101, the head end 203 gradually approaches to the side wall of the first spiral wall 101 to push the gas to the middle position of the compression chamber 601, the pressure of the gas also changes from low pressure to high pressure, when the gas arrives at the second compression chamber 6012, the pressure of the gas is higher than the pressure when the gas just inhaled into the low pressure chamber 603, and when the gas is pushed to the middle position of the compression chamber 601, the gas forms high pressure, and the pressure is the highest position. When the gas is advanced from the second compression chamber 6012 to the first compression chamber 6011 until the gas in the second compression chamber 6012 enters the first compression chamber 6011, the gas pressure in the second compression chamber 6012 decreases, at which time the pressure in the second compression chamber 6012 is smaller than the back pressure chamber 602; when the gas is compressed in the second compression chamber 6012, the pressure in the second compression chamber 6012 is greater than the back pressure chamber 602, both of which cause the gas pressure in the second compression chamber 6012 and the back pressure chamber 602 to form a difference.

Therefore, when the air pressure in the back pressure chamber 602 is lower than that in the second compression chamber 6012, the through hole 201 can introduce a part of the air pressure in the second compression chamber 6012 into the back pressure chamber 602, so that the movable vortex plate 2 is closer to the fixed vortex plate 1, the leakage of compressed air caused by overlarge separation of the movable vortex plate 2 and the fixed vortex plate 1 is avoided, and the compression efficiency is reduced.

On the other hand, when the pressure in the back pressure chamber 602 is higher than the pressure in the second compression chamber 6012, the through-hole 201 is provided so that the lubricating oil in the back pressure chamber 602 can flow to the second compression chamber 6012, thereby lubricating the portion where the fixed scroll 1 and the orbiting scroll 2 are in meshing contact, reducing friction; meanwhile, when the air pressure in the back pressure chamber 602 is lower than the pressure in the second compression chamber 6012, the lubricating oil in the second compression chamber 6012 may also flow back into the back pressure chamber 602 through the through-hole 201. The specific process is as follows: when the pressure in the second compression chamber 6012 is smaller than the back pressure chamber 602, the air pressure pushes the lubricating oil to flow into the second compression chamber 6012, and when the pressure in the second compression chamber 6012 is reduced and smaller than the back pressure chamber 602, the air pressure pushes the lubricating oil in the second compression chamber 6012 back to flow back into the back pressure chamber 602; the reason why the pressure is changed is that, as described above, the lubricant can flow back and forth in the second compression chamber 6012 and the back pressure chamber 602 by the pushing of the air pressure, which increases the fluidity thereof and also improves the lubrication effect.

The number of turns of the first spiral wall 101 and the second spiral wall 202 in the compressor may be different due to different types of compressors and different demands of users, and when the number of turns of the two spirals is greater, a third compression chamber 6013 or even more compression chambers are formed between the two side walls, and these compression chambers are all arranged along the radial direction of the orbiting scroll 2 or the fixed scroll 1, and at this time, the position of the through hole 201 is still set in the second compression chamber 6012, which is that: the high air pressure in the first compression chamber 6011 located at the middle of the compression chamber 601 may prevent the lubricant from flowing back and forth as described above, and on the other hand, if the through hole 201 is provided in the first compression chamber 6011, when the lubricant flows from the back pressure chamber 602 into the first compression chamber 6011, the lubricant may directly flow into the high pressure chamber 604 from the exhaust hole 102, and thus the contact portion between the fixed scroll 1 and the orbiting scroll 2 may not be lubricated.

On the other hand, if the through hole 201 is provided at a position near the head end 203, which is also the outermost compression chamber at this time, the position is inconvenient to communicate with the back pressure chamber 602 on the one hand, so that the lubricating oil cannot be guided into the interior of the compression chamber 601, and the air pressure in the compression chamber at this position cannot be introduced into the back pressure chamber 602; on the other hand, the compression chamber formed near the head end 20 just introduces the gas in the low pressure chamber 603 (i.e. the low pressure area) into the compression chamber 601 for compression, and the air pressure in the compression chamber is not greatly different from the air pressure in the low pressure area, so that the lubricating oil can only flow from the back pressure chamber 602 into the compression chamber 601, but cannot flow back, i.e. the fluidity of the lubricating oil cannot be improved, and the lubricating effect of the lubricating oil cannot be improved.

The through-hole 201 is provided at a position on the orbiting scroll 2 corresponding to the back pressure chamber 602, and the compression chamber where the through-hole 201 is located needs to have a pressure greater than that of the back pressure chamber 602 after compressing the gas, and cannot be located in the first compression chamber 6011 (i.e., at the highest pressure position), so that the back and forth flow of the lubricating oil in both the compression chamber 601 and the back pressure chamber 602 can be achieved.

As shown in fig. 12 and 13, the placement of the through-holes 201 immediately adjacent to the root of the second spiral wall 202 is due to the fact that this location is on the spiral line of the second spiral wall 202, which facilitates the calculation of the pressure in the compression chamber before production, since some of the pressure in the compression chamber 601 needs to be introduced into the back pressure chamber 602 through the through-holes 201, and how much pressure needs to be introduced through the through-holes 201 and how many through-holes 201 need to be opened are accurate calculations before production. If the through hole 201 is not arranged at the root position of the second spiral wall 202, the same effect can be achieved, but the complicated degree of pressure calculation can be improved before production, the processing difficulty can be increased during production, the hole opening position is inconvenient to position, and if the through hole 201 is arranged at the root position of the second spiral wall 202, the hole opening position can be positioned along the spiral line of the through hole, so that the device is quite convenient.

When the gas flows into the compression cavity 601 and is compressed, the lubricating oil in the low pressure cavity 603 is driven to enter the compression cavity 601, and when the compressed lubricating oil flows into the cavity 402 and is in an oil-gas mixing state, an oil-gas separation device is usually arranged in the cavity 402, the device is a conventional technical means in the art, the structure of the device is not described in detail herein, the separated gas is discharged from an outlet, the lubricating oil is left in the cavity 402, the lubricating oil flows downwards and is accumulated at the bottom of the cavity 402 under the action of gravity, and because the cavity 402 is a high-pressure area, the air pressure can push the lubricating oil to flow to the first oil way 401, then flows to the second oil way 501 and the back pressure cavity 602 from the first oil way 401, and then flows to the compression cavity 601 and the third oil way 701 respectively, and the third oil way 701 is communicated with the low pressure cavity 603, so that the lubricating oil can lubricate the fixed scroll 1, the movable scroll 2 and the main bearing seat 5.

Wherein, as shown in fig. 6, the cross-sectional area of the second oil passage 501 is smaller than the cross-sectional area of the first oil passage 401, and the outlet of the first oil passage 401 communicates with the inlet of the second oil passage 501. Because the cavity 402 is a high-pressure area, when the high-pressure gas pushes the lubricating oil to flow, the lubricating oil can have pressure, and the lubricating oil can flow rapidly, so that the lubricating oil has poor lubricating effect, and after the lubricating oil flows rapidly, no seal formed by the lubricating oil is formed in each oil path, and the high-pressure gas can return to the back pressure cavity 602, the low-pressure cavity 603 and the compression cavity 601 along with the first oil path 401, the second oil path 501, the third oil path 701 and the through hole 201, so that repeated compression is caused, and the working efficiency of the compressor can be reduced.

Therefore, the flow of the lubricating oil needs to be throttled, when the lubricating oil flows from the first oil path 401 to the second oil path 501 again through the arrangement of the different cross sectional areas of the first oil path 401 and the second oil path 501, the flow rate is reduced, so that the throttling effect is achieved, the lubricating oil separated from the cavity 402 cannot flow out quickly due to the throttling effect, the lubricating oil can be temporarily accumulated in the cavity 402, the accumulated liquid level is higher than the inlet height of the first oil path 401, and a liquid seal is formed, so that gas can only be discharged from the outlet of the cavity 402, and cannot return to the inside of the compressor from the first oil path 401 and the second oil path 501.

To further enhance the effect of the restriction, the compressor comprises a first restriction 8a, the first restriction 8a being at least partially located in the first oil passage 401, the first restriction 8a being located at the outlet position of the first oil passage 401. When the lubricating oil enters the first oil path 401, the first throttling plug 8a can throttle the flowing lubricating oil in advance, so that the flow of the lubricating oil is reduced before the lubricating oil enters the second oil path 501, and the lubricating oil can be effectively throttled by combining the first oil path 401 and the second oil path 501.

In addition, as shown in fig. 3, in one embodiment, the second oil path 501 is a straight channel, and may be disposed on the main bearing housing 5 vertically or obliquely, where an inlet of the second oil path 501 communicates with an outlet of the first oil path 401, and an outlet of the second oil path 501 communicates with the back pressure chamber 602.

In another embodiment, as shown in fig. 4, the second oil path 501 is an oil groove formed on an end surface of the main bearing housing 5, and two ends of the oil groove are respectively communicated with an outlet of the first oil path 401 and the back pressure chamber 602, so as to guide the lubricating oil flowing in the first oil path 401 into the back pressure chamber 602.

In yet another embodiment, as shown in fig. 5 and 6, the second oil passage 501 includes an oil intake section 5011 and an oil discharge section 5012, an inlet of the oil intake section 5011 communicates with an outlet of the first oil passage 401, an outlet of the oil discharge section 5012 communicates with the back pressure chamber 602, and an outlet of the oil intake section 5011 communicates with an inlet of the oil discharge section 5012. An included angle is formed between the oil inlet section 5011 and the oil outlet section 5012, or an included angle is formed by the straight line where the central axes of the oil inlet section 5011 and the oil outlet section 5012 are located, and the included angle is preferably an acute angle, so that the advancing route of lubricating oil in the second oil way 501 is bent, the flowing speed of the oil is further slowed down, and the throttling effect is achieved.

As shown in fig. 19-21, main bearing housing 5 has an oil facing surface 503 and a oil backing surface 504, main bearing housing 5 having a recessed platform 505; the oil inlet section 5011 penetrates the oil facing surface 503 and the oil back surface 504, and the oil outlet section 5012 has one end penetrating the oil back surface 504 and the other end penetrating the side wall of the oil facing surface 503 or the concave table 505. At this time, the outlet of the oil inlet section 5011 and the inlet of the oil outlet section 5012 may be directly connected, or may be connected through a connection groove 5013 formed in the main bearing housing 5, so that the lubricating oil flows through the oil inlet section 5011 to the connection groove 5013, and then flows through the connection groove 5013 to the oil outlet section 5012.

When the outlet of the oil inlet segment 5011 and the inlet of the oil outlet segment 5012 are directly connected and are located in the main bearing seat 5, the connection slot 5013 cannot be provided at the position of the outlet of the oil inlet segment 5011 and the inlet of the oil outlet segment 5012.

In addition, the compressor further comprises a secondary bearing seat 9, the rotating shaft 7 is partially mounted on the secondary bearing seat 9, the rotating shaft 7 is provided with a communication hole 702, a gap is formed between the secondary bearing seat 9 and the rotating shaft 7, the communication hole 702 is communicated with the third oil path 701, and the communication hole 702 is at least partially communicated with the gap. The gap may be formed by providing a notch in the bearing provided in the sub-bearing holder 9, so that the lubricating oil can lubricate the bearing.

As shown in fig. 2, when the lubricating oil flows from the back pressure chamber 602 to the third oil passage 701, the oil flows into the sub-bearing housing 9 and the bearing provided therein due to the communication hole 702, and then flows to the low pressure chamber 603, whereby the sub-bearing housing 9 can be sufficiently lubricated.

As shown in fig. 7-9, in one embodiment, the compressor has an oil return channel 103, the fixed scroll 1 further includes a first end plate 106, the first end plate 106 is connected to the first spiral wall 101, the orbiting scroll 2 further includes a second end plate 204, an end of the first spiral wall 101 away from the first end plate 106 is at least partially in contact with the second end plate 204, the oil return channel 103 is located in the fixed scroll 1, an inlet of the oil return channel 103 is in communication with the cavity 402, an outlet of the oil return channel 103 is located at an end of the first spiral wall 101 away from the first end plate 106, and an outlet of the oil return channel 103 can be in communication with the compression cavity 601.

Wherein the contact fit may be such that an end of the first spiral wall 101 remote from the first end plate 106 is in direct contact with the second end plate 204, thereby forming a fit; a sealing gasket or the like may be disposed at an end of the first spiral wall 101 away from the first end plate 106, and the sealing gasket is disposed along the spiral line, so that the end of the first spiral wall 101 away from the first end plate 106 is indirectly contacted with the second end plate 204, or may form a matched compressed gas.

Because the compression of the gas mainly depends on the mutual matching of the fixed scroll 1 and the movable scroll 2, the part is also the most easily worn part, if the lubricating oil in the cavity 402 flows back to the low-pressure cavity 603 in a traditional mode, the lubricating oil is mixed by the flowing of the gas and enters the compression cavity 601 for lubrication, so that the lubricating oil not only travels along a longer path, but also has a longer period, and is lubricated by the lubricating oil mixed with the low-pressure gas, the lubricating effect is poor because the pressure is lower, the lubricating oil can become more viscous especially under the low-temperature working condition, and the low-pressure cold gas cannot completely drive the lubricating oil to flow fully, so that the critical part is insufficiently lubricated. In this embodiment, after the high-pressure gas is mixed with the lubricating oil and separated in the cavity 402, the lubricating oil is directly and timely and rapidly introduced into the compression cavity 601 through the oil return channel 103 by the high-pressure gas, so as to fully lubricate the contact area of the fixed scroll 1 and the movable scroll 2.

As shown in fig. 8, in the process of matching the fixed scroll 1 and the movable scroll 2, the eccentric rotation of the second end plate 204 in the movable scroll 2 makes the outlet of the oil return channel 103 intermittently contact with the second end plate 204, when the two contact each other, the lubricating oil in the oil return channel 103 flows onto the second end plate 204, and at this time, the lubricating oil is driven to flow in the compression cavity 601 along with the continuous rotation of the movable scroll 2, so that the contact place between the fixed scroll 1 and the movable scroll 2 is fully lubricated. When the outlet of the oil return passage 103 is not in contact with the second end plate 204, the lubricating oil flows out from the outlet of the oil return passage 103, and further lubricates the portion where the fixed scroll 1 is in contact with the exhaust cover 4.

In one embodiment, the oil return passage 103 is a straight passage, and may be provided horizontally or obliquely to the fixed scroll 1 to guide the lubricating oil.

In another embodiment, the oil return passage 103 includes at least an oil return section 1031 and a throttle section 1032, the oil return section 1031 having an inlet in communication with the cavity 402 and an outlet of the oil return section 1031 in communication with the throttle section 1032, the outlet of the throttle section 1032 being located at an end of the first spiral wall 101 remote from the first end plate 106.

The inside high-pressure area that is of cavity 402, the pressure of gas is great, and then the lubrication oil that gets into oil return channel 103 from discharge wherein also has certain pressure, on the same, if not to the lubricating oil decompression of flowing through, can make the speed that lubricating oil flowed through accelerate, not only lead to lubricated effect relatively poor, and the lubrication oil velocity is faster in addition, the oil blanket that does not have lubricating oil formation in the oil return channel 103 can make the interior compressed gas of cavity 402 follow oil return channel 103 backward flow to the compressor inside, the gas of backward flow can be compressed again and can lead to the fact repetition compression, reduce the work efficiency of compressor.

The oil return section 1031 and the throttle section 1032 are arranged, after the oil return section 1031 introduces the lubricating oil, the throttle section 1032 can throttle and decompress the lubricating oil, wherein a bent flow path is arranged between the oil return section 1031 and the throttle section 1032, and the oil return section 1031 and the throttle section 1032 are not positioned on the same straight line, so that the lubricating oil is decompressed and throttled when flowing through. In an embodiment, the oil return section 1031 is disposed on the fixed scroll 1 along the axial direction of the fixed scroll 1, the throttle section 1032 is disposed on the fixed scroll 1 along the radial direction of the fixed scroll 1, and the oil return section 1031 and the throttle section 1032 are mutually communicated, at this time, the inlet of the throttle section 1032 needs to be located on the side wall of the fixed scroll 1 for convenient processing due to the processing mode, but since the side wall of the fixed scroll 1 abuts against the inner wall of the exhaust cover 4, a part of the lubricating oil flowing through the oil return section 1031 can flow out from the inlet of the throttle section 1032; lubricating the contact part of the fixed scroll 1 and the exhaust cover 4; since the throttle section 1032 is disposed along the radial direction of the fixed scroll 1, the end of the first spiral wall 101 away from the first end plate 106 needs to be further provided with the oil hole to communicate with the throttle section 1032, so that the lubricating oil can flow back between the fixed scroll 1 and the movable scroll 2.

The angle of the bending flow path between the oil return section 1031 and the throttling section 1032 may be an obtuse angle or an acute angle, where the throttling and pressure reducing effect of the acute angle is best, but the processing difficulty is relatively high, and when the bending flow path between the oil return section 1031 and the throttling section 1032 is a right angle, the processing is convenient, and the pressure reducing and throttling effect is relatively better than that of the obtuse angle.

As shown in fig. 8 and 10-11, in addition, the compressor has an oil return groove 1033, the oil return groove 1033 being located at an end of the first spiral wall 101 remote from the first end plate 106, the oil return groove 1033 being in communication with the outlet of the restriction 1032. When the first spiral wall 101 is in abutting engagement with the second end plate 204, the oil return groove 1033 may temporarily accommodate more lubricating oil flowing out of the outlet of the throttle section 1032, thereby increasing the amount of lubricating oil flowing between the fixed scroll 1 and the orbiting scroll 2.

The end of the oil return groove 1033 away from the outlet of the throttling section 1032 can be communicated with the compression cavity 601 formed between the fixed scroll 1 and the movable scroll 2 when the first spiral wall 101 is in abutting engagement with the second end plate 204, at this time, lubricating oil can directly enter the compression cavity 601, various parts in the cavity can be lubricated along with rotation of the movable scroll 2, oil seal can be formed in the oil return groove 1033 by the lubricating oil, and compressed gas cannot leak.

In one embodiment, the first spiral wall 101 has a first end 104 near the oil return passage 103 and a second end 105 far from the oil return passage 103, and the oil return groove 1033 extends in an arc shape from the first end 104 toward the second end 105.

The oil return groove 1033 extends from the first end 104 to the second end 105, namely extends from the lower position to the higher position of the fixed scroll 1, so that lubricating oil is also sent to the higher position, and flows downwards under the action of self gravity, and the continuous rotation of the movable scroll 2 is combined to drive the flow of the lubricating oil, so that the lubricating effect is greatly improved.

In addition, the cavity 402 has an oil reservoir 4022, and an inlet of the oil return section 1031 communicates with the oil reservoir 4022; the compressor has an exhaust tube 4023, the exhaust tube 4023 being in communication with the cavity 402, the inlet of the oil return section 1031 being located on a side of the cavity 402 remote from the exhaust tube 4023.

The oil return section 1031 comprises an oil guide channel 403 and a slow flow channel 10311, the oil guide channel 403 is positioned on the exhaust cover 4, and the slow flow channel 10311 is positioned on the fixed scroll 1; an inlet of the oil guide channel 403 is communicated with the oil storage area 4022, an outlet of the oil guide channel 403 is communicated with an inlet of the slow flow channel 10311, and an outlet of the slow flow channel 10311 is communicated with an inlet of the throttle section 1032.

The compressor comprises a main bearing seat 5, the compressor is provided with a low-pressure cavity 603 and an oil guiding cavity 605, and the oil guiding cavity 605 is positioned between the main bearing seat 5 and the fixed scroll 1; in the radial direction of the fixed scroll 1, an oil guiding cavity 605 is positioned at the outer side of the compression cavity 601, and the oil guiding cavity 605 is communicated with the low pressure cavity 603; the main bearing housing 5 has an air vent 502, and the air vent 502 communicates an air vent chamber 605 with a low pressure chamber 603.

After the oil-gas separation device in the cavity 402 separates the lubricating oil, the lubricating oil flows downwards under the action of gravity to be temporarily accommodated in the oil storage area 4022, then the lubricating oil is led into the oil return channel 103 by the oil guide channel 403, then flows out from the outlet of the throttling section 1032, along with the contact and matching of the first spiral wall 101 and the second end plate 204, the inlet of the throttling section 1032 is intermittently exposed, when the inlet of the throttling section 1032 is exposed, the lubricating oil flows into the oil guide cavity 605 from the inlet of the throttling section 1032, and the lubricating oil temporarily stored in the oil guide cavity 605 is guided into the low-pressure cavity 603 by the air guide hole 502.

As shown in fig. 16-18, the inlet of the oil return section 1031 is disposed at a side far from the exhaust pipe 4023, so that the lubricating oil accumulated in the oil storage area 4022 submerges the inlet of the oil return section 1031, thereby forming an oil seal, and preventing the compressed gas in the cavity 402 from leaking from the oil return section 1031 back into the low pressure cavity 603, and the phenomenon of repeated compression occurs.

Wherein the cross-sectional area of the slow flow channel 10311 is smaller than the cross-sectional area of the oil guide channel 403, the compressor comprises a second throttle plug 8b, and the second throttle plug 8b is at least partially positioned in the oil guide channel 403. The cross-sectional area of the slow flow channel 10311 is smaller than that of the oil guide channel 403, so that the oil quantity of the lubricating oil flowing through the slow flow channel can be reduced, and the second throttling plug 8b is combined to effectively throttle and decompress the lubricating oil, so that the separated lubricating oil can be temporarily accumulated in the cavity 402, and the lubricating oil has a liquid level higher than that of an inlet of the oil return section 1031.

In one embodiment, the lubricating oil introduced into the compression chamber 601 from the throttle section 1032 can flow from the through hole 201 into the back pressure chamber 602, and lubricate the main bearing housing 5 and the contact portion between the main bearing housing 5 and the orbiting scroll 2.

The lubricating oil in the cavity 402 not only can flow into the space between the fixed scroll 1 and the movable scroll 2 from the oil return channel 103, but also can flow through the first oil way 401, the second oil way 501 and the third oil way 701 to lubricate the fixed scroll 1 and the movable scroll 2, and the parts of the main bearing seat 5 and the auxiliary bearing seat 9 which need to be lubricated can be lubricated, so that the abrasion of each part can be greatly reduced by reasonably distributing the lubricating oil.

22-27, the compressor further includes a distribution pipe 408, the distribution pipe 408 being mounted to the discharge cover 4, as shown in FIGS. 1 and 22, wherein the cavity 402 includes a separation section 410 and an oil storage section 411, the distribution pipe 408 being at least partially located within the separation section 410; the exhaust cover 4 is provided with an exhaust pipe 4023 and a plugging duct 409, and the exhaust pipe 4023 and the plugging duct 409 are respectively positioned at two opposite sides of the cavity 402 in the axial direction of the oil distributing pipe 408; the compressor comprises a blocking portion 414, the blocking portion 414 is at least partially located in the blocking duct 409, the blocking portion 414 blocks one side of the cavity 402, and the oil storage section 411 is closer to the blocking portion 414 than the separation section 410.

When the cavity 402 is machined, the two sides are respectively machined along the axial direction of the oil distributing pipe 408, the formed exhaust pipes 4023 are used for guiding out high-pressure gas, the plugging pore channels 409 can be used for overhauling and maintaining the inside of the cavity 402, the exhaust pipes 4023 and the plugging pore channels 409 are located on different sides, and the plugging pore channels 409 are close to the first oil path 401 and the oil guide channel 403, so that the plugging pore channels 409 can be cleaned and dredged in time when impurities are blocked in the first oil path 401 and the oil guide channel 403. Then, the oil distribution pipe 408 is installed from the exhaust pipe 4023 into the cavity 402, and at least part of the oil distribution pipe 408 extends into the separation section 410, so that the gas containing lubricating oil in the separation section 410 can be separated through filtering of the oil distribution pipe 408, and the separated lubricating oil can be temporarily accumulated in the oil storage area 4022 from the outer wall of the oil distribution pipe 408 and the inner wall of the cavity 402.

As shown in fig. 22 to 23 and fig. 26 to 27, in which the exhaust pipe 4023 communicates with the cavity 402, the aperture of the separation section 410 is larger than that of the exhaust pipe 4023, the exhaust pipe 4023 has a ring stopper 412, the oil distribution pipe 408 has an abutment 413, and the abutment 413 abuts against the ring stopper 412 along the axial direction of the oil distribution pipe 408.

The larger aperture of the separation section 410 compared to the exhaust tube 4023 allows the separation section 410 to have a larger space between the inner wall of the separation section 410 and the outer wall of the separation section 408 when the separation section 408 is partially inserted into the separation section 410, so that no pressure loss occurs when the high-pressure gas passes through the space. If the aperture of the separation section 410 is the same as or smaller than the aperture of the exhaust pipe 4023, the interval between the outer wall of the oil distribution pipe 408 and the inner wall of the separation section 410 becomes small when the oil distribution pipe 408 is installed, and a loss of pressure occurs when high-pressure gas enters the cavity 402 from the interval. Processing the cavity 402 from opposite sides can facilitate processing the separation section 410 and the exhaust pipe 4023, and if processing is performed only from the side of the exhaust pipe 4023, the aperture of the separation section 410 is difficult to process to be larger than the aperture of the exhaust pipe 4023, while processing from both sides is convenient for precisely controlling the aperture of the separation section 410 to be larger than the exhaust pipe 4023, and plugging the duct 409 also enables the cavity 402 to be provided with one more access hole.

The oil distribution pipe 408 is detachably mounted in the cavity 402, the abutting part 413 abuts against the annular blocking part 412, the abutting of the two parts realizes limit, and the oil distribution pipe 408 extends into the separation section 410 partially.

In addition, the compressor has a bore 4021, the bore 4021 communicating the high pressure chamber 604 with the cavity 402; the maximum distance between the portion of the oil distribution pipe 408 located in the separation section 410 and the annular stop 412 is greater than the maximum distance between the hole 4021 and the annular stop 412 in the axial direction of the oil distribution pipe 408.

The gas compressed by the fixed scroll 1 and the movable scroll 2 is temporarily stored in the high-pressure cavity 604, and then flows into the cavity 402 through the hole 4021, and the maximum distance between the part of the oil distributing pipe 408 located in the separating section 410 and the annular blocking part 412 is larger than the maximum distance between the hole 4021 and the annular blocking part 412, so that the end part of the oil distributing pipe 408 is far away from the hole 4021, when the gas enters the cavity 402, the gas moves towards the oil storage area 4022 along the axial direction of the cavity 402, and then moves towards the end part of the oil distributing pipe 408 for oil-gas separation, and is exported. The gas mixed with the lubricating oil moves towards the oil storage area 4022 firstly, the gas is guided out from the end part of the oil distribution pipe 408 after moving, and then the gas is matched with the gravity of the lubricating oil, so that the oil-gas separation effect is greatly improved, the gas entering from the hole 4021 can contact the inner wall of the cavity 402 and the outer wall of the oil distribution pipe 408, so that some lubricating oil can be adhered, the oil-gas separation effect is indirectly improved, and the adhered lubricating oil can slide along the side wall to the oil storage area 4022 for temporary storage.

In one embodiment, the aperture 4021 is located in the separation section 410. The holes 4021 may be opened directly in the sidewall of the separation section 410.

Wherein the aperture 4021 is located at a position of the separation section 410 near the exhaust tube 4023. The closer the hole 4021 is to the exhaust pipe 4023, i.e. the farther is from the end of the oil distributing pipe 408 located in the separating section 410, so that after the gas enters the cavity 402, the gas will travel longer, and the outer wall of the oil distributing pipe 408 and the inner wall of the separating section 410 will adhere to more lubricating oil, which is more beneficial to oil-gas separation. If the hole 4021 is close to the end of the oil distribution pipe 408 located in the separation section 410, the entering gas is immediately guided out from the end of the oil distribution pipe 408, and the effect of separating the lubricating oil and the high-pressure gas from the oil distribution pipe 408 is deteriorated.

In another embodiment, as shown in fig. 16 and 26, the exhaust cover 4 has an extension 416, the extension 416 is located at the separation section 410, the hole 4021 is located at the extension 416, and a position between an outer wall of the oil distribution pipe 408 and an inner wall of the cavity 402 is opposite to at least part of the hole 4021 in an axial direction of the hole 4021.

At this time, when gas enters the cavity 402 from the hole 4021, the gas does not directly contact the oil distribution pipe 408, but enters between the outer wall of the oil distribution pipe 408 and the inner wall of the cavity 402, and forms spiral air intake between the outer wall of the oil distribution pipe 408 and the inner wall of the cavity 402, and in this air intake mode, lubricating oil can be thrown onto the inner wall of the cavity 402 under the action of centrifugal force, so that the oil-gas separation effect is further improved.

As shown in fig. 16, the exhaust cover 4 has an inner annular wall 406 and an inner end wall 407, and the cavity 402 is at least partially located in the inner end wall 407, with both ends of the cavity 402 extending through the exhaust cover 4.

The cavity 402 may be partially located on the inner end wall 407 of the exhaust cover 4, or may be located entirely within the inner end wall 407, but in any manner, both ends of the cavity 402 extend through the exhaust cover 4 so as to communicate with the exhaust pipe 4023 and the plugging duct 409.

In one embodiment the plug 414 is threadedly engaged with the plug aperture 409. The plugging portion 414 is used for plugging the pore passage 409, so that the installation is convenient, and the overhaul and the maintenance are convenient.

In another embodiment, the plug 414 is in welded engagement with the plug aperture 409.

As shown in fig. 1, the exhaust cover 4 has a mounting portion 417, the mounting portion 417 has a mounting hole 418, and the exhaust pipe 4023 is at least partially located in the mounting portion 417. The mounting portion 417 is provided to facilitate the connection between the exhaust pipe 4023 and the external device, and also to facilitate the alignment of the external device with the exhaust pipe 4023.

In addition, in an embodiment, as shown in fig. 22 to 25, the compressor further includes a sealing member 10 and an elastic member 11, the sealing member 10 is located between an outer side wall of the fixed scroll 1 and an inner wall of the exhaust cover 4, the fixed scroll 1 has an exhaust hole 102, the outer side wall is located at a position where the first spiral wall 101 is far away from the exhaust hole 102, the elastic member 11 is located between a side of the fixed scroll 1 far away from the orbiting scroll 2 and the exhaust cover 4, and the elastic member 11 is in abutting fit with the fixed scroll 1 and the exhaust cover 4.

In the process of compressing the refrigerant gas by the fixed scroll 1 and the movable scroll 2, liquid refrigerant enters the compression cavity 601, but because of incompressibility of the liquid, the compression cavity has larger pressure, the elastic piece 11 can enable the fixed scroll 1 to move in the axial direction, so that the fixed scroll 1 and the movable scroll 2 are separated, the liquid refrigerant is decompressed,

when the pressure is reduced, the elastic piece 11 can resist the static vortex plate 1 to approach the movable vortex plate 2 for lamination, and the gas is continuously compressed.

As shown in fig. 23, the elastic member 11 directly abuts against the fixed scroll 1 and the exhaust cover 4, when the pressure in the compression chamber 601 is too high, the elastic member 11 can quickly react to avoid the fixed scroll 1 in the axial direction thereof, or when the excessive pressure in the compression chamber 601 is released, the elastic member 11 can also quickly react to press the fixed scroll 1 to attach to the movable scroll 2. Since the high pressure chamber 604 is located between the fixed scroll 1 and the discharge cover 4, in order to ensure the sealability of the high pressure chamber 604, the conventional sealing method is to provide the sealing member 10 between the fixed scroll 1 and the discharge cover 4, but there is a problem in that the sealability between the fixed scroll 1 and the discharge cover 4 is deteriorated when the fixed scroll 1 moves, and thus a good seal cannot be always maintained. In this embodiment, the sealing member 10 (the sealing member 10 may be an O-ring) is disposed between the outer side wall of the fixed scroll 1 and the inner wall of the exhaust cover 4, and at this time, since the outer side wall of the fixed scroll 1 is at least partially located in the exhaust cover 4 and the inner wall of the exhaust cover 4 has a length in the axial direction, the sealing member 10 is always kept between the outer side wall of the fixed scroll 1 and the inner wall of the exhaust cover 4, and even if the fixed scroll 1 moves axially, the sealing failure will not occur. The tightness of the high-pressure cavity 604 can be realized only through the elastic piece 11 and the sealing piece 10, and meanwhile, the fixed vortex disc 1 has axial flexibility and can move along the axial direction, so that the structure is simpler, the installation is more convenient, and the practicability is wider.

The exhaust cover 4 has an inner supporting portion 404, the first end plate 106 has a receiving groove 107, along the axial direction of the fixed scroll 1, the receiving groove 107 is at least partially opposite to the inner supporting portion 404, the elastic member 11 is at least partially located in the receiving groove 107, and the elastic member 11 is in abutting engagement with the inner supporting portion 404 and the fixed scroll 1.

The inner abutment 404 may provide a point at which the fixed scroll 1 abuts on the one hand, and also form a high pressure chamber 604 between the fixed scroll 1 and the exhaust cover 4 on the other hand. The setting of holding tank 107 also is convenient for the installation of elastic component 11 to holding tank 107 also has spacing effect to elastic component 11, makes its condition that also can not appear the position deviation under operating condition, avoids elastic component 11 unable to play the effect.

The receiving groove 107 is located at a central position away from the first end plate 106, and the exhaust cover 4 has an inner annular wall 406 and an inner end wall 407, and the inner abutment 404 is located at the inner annular wall 406. When the elastic member 11 in the accommodating groove 107 is abutted against the inner wall of the exhaust cover 4, the pressure is more stable and more uniform. If the receiving groove 107 is arranged near the center of the first end plate 106, if the pressure in the compression cavity 601 is too high, the fixed scroll 1 is pressed against the exhaust cover 4, and at this time, the elastic member 11 may be deformed toward one side, so that the condition that the stress of the fixed scroll 1 is uneven may occur; for example, when one side of the end face of the fixed scroll 1 abuts against the inner wall of the exhaust cover 4, the other side of the end face of the fixed scroll 1 does not contact the inner wall of the exhaust cover 4 yet, so that abrasion of the fixed scroll 1 is increased.

In another embodiment, the compressor includes a first wear pad, the first wear pad is located between the elastic member 11 and the inner wall of the exhaust cover 4, and the elastic member 11 indirectly abuts against the exhaust cover 4 through the first wear pad, so as to prevent wear between the two. In still another embodiment, the compressor includes a second wear pad between the elastic member 11 and the fixed scroll 1, the second wear pad being located in the receiving groove 107; to prevent wear occurring between the elastic member 11 and the fixed scroll 1. The first wear-resisting piece and the second wear-resisting piece are made of steel materials.

As shown in fig. 23-25, the inner abutment 404 includes a boss 405, the boss 405 having a boss peripheral wall 4051, the first spiral wall 101 having a stationary disc peripheral wall 108, the seal 10 being in sealing contact with the stationary disc peripheral wall 108 and the boss peripheral wall 4051, the stationary disc peripheral wall 108 having a seal groove 110, the seal 10 being at least partially located within the seal groove 110.

The boss peripheral wall 4051 has a length in the axial direction, and the moving range of the fixed scroll 1 in the axial direction thereof falls on the face of the boss peripheral wall 4051, so that when the fixed scroll 1 is displaced, the seal member 10 can always abut against the inside of the seal groove 110 and the boss peripheral wall 4051, always maintaining the seal of the high pressure chamber 604, and the high pressure gas in the high pressure chamber 604 is not caused to leak into the low pressure chamber 603.

As shown in fig. 23 to 25, the boss 405 further has a first stopper portion 4052, and the first stopper portion 4052 is connected to the boss peripheral wall 4051; the first spiral wall 101 further has a second limiting portion 109, the second limiting portion 109 is connected to the static disc peripheral wall 108, and the first limiting portion 4052 is used for limiting the second limiting portion 109 in the axial direction of the static vortex disc 1.

Under the non-working state of the compressor, the elastic piece 11 props against the fixed scroll 1 to be attached to the movable scroll 2, at this time, the first limiting part 4052 and the second limiting part 109 are provided with a gap, when the fixed scroll 1 and the movable scroll 2 are matched for compression, and when the pressure in the compression cavity 601 is overlarge, the fixed scroll 1 can move in the axial direction of the fixed scroll at this time, the gap provides a space for the displacement of the fixed scroll 1, at this time, the first limiting part 4052 can limit the fixed scroll 1, and prevent the displacement of the fixed scroll from overlarge and the movable scroll 2 from being completely separated. When the pressure is reduced after the excessive pressure is released, the elastic piece 11 is pressed against the fixed scroll 1 again to return to the starting state, so that the normal operation of gas compression is ensured.

Wherein the seal groove 110 is located at a position of the first spiral wall 101 near the high pressure chamber 604. The sealing groove 110 is disposed at the position close to the outer side wall of the first spiral wall 101 of the high pressure chamber 604, so that the volume of the high pressure chamber 604 can be reduced, if the sealing groove 110 is located at the position far away from the high pressure chamber 604, the volume of the high pressure chamber 604 can also be increased along with the distance of the sealing groove 110, and if the volume of the high pressure chamber 604 is too large, the pressure of the compressed gas can be affected.

In addition, as shown in fig. 24 to 25, the compressor includes bolts through which the main bearing housing 5 and the exhaust cover 4 are connected; the fixed scroll 1 is provided with a limiting groove 111, and the bolt is at least partially positioned in the limiting groove 111. Because the fixed scroll 1 and the exhaust cover 4 only resist by the elastic member 11, the fixed scroll 1 and the movable scroll 2 are in only meshed relation, and under actual working conditions, the fixed scroll 1 needs to be kept relatively fixed in the radial direction and the circumferential direction, and the fixed scroll 1 can be kept fixed in the radial direction and the circumferential direction by the cooperation of the limiting groove 111 and the bolt. And the bolts are used for limiting the fixed scroll 1 and connecting the main bearing seat 5 and the exhaust cover 4. No extra parts are added.

The above embodiments are only for illustrating the present application and not for limiting the technical solutions described in the present application, and the understanding of the present specification should be based on the description of directionality such as "front", "rear", "left", "right", "upper", "lower", etc. by the skilled person, only for describing the relationship between the objects, and not for limiting the nature, "a plurality" means at least two or more.

Although the application has been described in detail with reference to the above embodiments, it will be understood by those skilled in the art that the modifications and equivalents may be made thereto without departing from the spirit and scope of the application as defined in the appended claims.

Claims

1. A compressor, which is characterized by comprising a fixed scroll (1), an movable scroll (2) and an exhaust cover (4); the compressor is provided with a compression cavity (601) and a high-pressure cavity (604), the compression cavity (601) is positioned between the fixed scroll (1) and the movable scroll (2), and the high-pressure cavity (604) is positioned between the fixed scroll (1) and the exhaust cover (4);

wherein, compressor has oil return passageway (103), exhaust lid (4) have cavity (402), quiet vortex dish (1) include first spiral wall (101) and first end plate (106), move vortex dish (2) including second end plate (204), the one end of first end plate (106) is kept away from to first spiral wall (101) is at least partly with second end plate (204) contact cooperation, oil return passageway (103) are located quiet vortex dish (1), the entry and the cavity (402) intercommunication of oil return passageway (103), the export of oil return passageway (103) is located the one end that first end plate (106) was kept away from to first spiral wall (101), the export of oil return passageway (103) can communicate with compression chamber (601).

2. The compressor of claim 1, wherein the oil return passage (103) comprises at least an oil return section (1031) and a throttle section (1032), an inlet of the oil return section (1031) being in communication with the cavity (402), an outlet of the oil return section (1031) being in communication with the throttle section (1032), an outlet of the throttle section (1032) being located at an end of the first spiral wall (101) remote from the first end plate (106).

3. The compressor according to claim 2, characterized in that it has an oil return groove (1033), said oil return groove (1033) being located at the end of the first spiral wall (101) remote from the first end plate (106), said oil return groove (1033) being in communication with the outlet of the restriction (1032).

4. A compressor according to claim 3, wherein the first spiral wall (101) has a first end (104) close to the oil return channel (103) and a second end (105) remote from the oil return channel (103), the oil return groove (1033) extending in an arc from the first end (104) to the second end (105).

5. The compressor of claim 2, wherein the cavity (402) has an oil storage zone (4022), the inlet of the oil return section (1031) being in communication with the oil storage zone (4022); the compressor is provided with an exhaust pipe (4023), the exhaust pipe (4023) is communicated with the cavity (402), and an inlet of the oil return section (1031) is positioned on one side, away from the exhaust pipe (4023), of the cavity (402).

6. The compressor of claim 5, wherein the oil return section (1031) includes an oil guide channel (403) and a slow flow channel (10311), the oil guide channel (403) being located in the exhaust cover (4), the slow flow channel (10311) being located in the fixed scroll (1); an inlet of the oil guide channel (403) is communicated with the oil storage area (4022), an outlet of the oil guide channel (403) is communicated with an inlet of the slow flow channel (10311), and an outlet of the slow flow channel (10311) is communicated with an inlet of the throttling section (1032).

7. The compressor of claim 6, wherein the flow area of the slow flow channel (10311) is smaller than the flow area of the oil guide channel (403), the compressor comprising a second throttle plug (8 b), the second throttle plug (8 b) being at least partially located within the oil guide channel (403).

8. The compressor according to claim 7, characterized in that it comprises a main bearing housing (5), said compressor having a low pressure chamber (603) and an oil guiding chamber (605), said oil guiding chamber (605) being located between the main bearing housing (5) and the stationary scroll (1); in the radial direction of the fixed scroll (1), the oil guide cavity (605) is positioned at the outer side of the compression cavity (601), and the oil guide cavity (605) is communicated with the low-pressure cavity (603); the main bearing seat (5) is provided with an air vent (502), and the air vent (502) is communicated with the oil guide cavity (605) and the low-pressure cavity (603).

9. The compressor according to claim 8, characterized in that the compressor has a back pressure chamber (602), the back pressure chamber (602) is located between the main bearing seat (5) and the orbiting scroll (2), a through hole (201) is provided on the orbiting scroll (2), and the through hole (201) communicates with the compression chamber (601) and the back pressure chamber (602).

10. The compressor according to claim 9, characterized in that the compressor comprises a rotating shaft (7), the exhaust cover (4) has a first oil passage (401), the main bearing housing (5) has a second oil passage (501), and the rotating shaft (7) has a third oil passage (701); the first oil way (401) is communicated with the cavity (402), the first oil way (401) is communicated with the second oil way (501), the second oil way (501) is communicated with the back pressure cavity (602), the back pressure cavity (602) is communicated with the third oil way (701), and the third oil way (701) is communicated with the low pressure cavity (603).