CN115450920A

CN115450920A - Oil-gas separation assembly, end cover assembly and scroll compressor

Info

Publication number: CN115450920A
Application number: CN202211130318.2A
Authority: CN
Inventors: 魏会军; 韦衍
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2022-09-15
Filing date: 2022-09-15
Publication date: 2022-12-09

Abstract

The application provides an oil-gas separation subassembly, end cover subassembly and scroll compressor. The oil-gas separation component comprises a cyclone separation component, a cyclone separator and a cyclone separator, wherein the upper part of a core pipe is hermetically fixed in the shell; the oil blocking piece comprises an oil blocking pipe, and the oil blocking pipe is vertically arranged in the shell and is positioned below the core pipe; the lower part of the core tube is inserted into the oil blocking tube, and the outer diameter of the core tube is smaller than the inner diameter of the oil blocking tube. According to the oil retaining pipe, the lower portion of the core pipe is inserted into the oil retaining pipe, high-speed rotating airflow can only act on the outer portion of the oil retaining pipe, liquid below the core pipe in the oil retaining pipe cannot be coiled, the liquid can be prevented from entering the core pipe when the high-speed rotating airflow is used for winding, and therefore the exhaust oil content of the scroll compressor can be reduced.

Description

Oil-gas separation assembly, end cover assembly and scroll compressor

Technical Field

The application belongs to the technical field of scroll compressors, and particularly relates to an oil-gas separation assembly, an end cover assembly and a scroll compressor.

Background

The oil-gas separation structure in the scroll compressor is concerned about improving the oil-gas separation efficiency, but has the characteristic of an exhaust passage in the oil-gas separation structure, and the inlet and the outlet of the exhaust passage are both arranged on the end surfaces of two sides of the oil-gas separation structure. In fact, as the rotating speed of the compressor is increased, the exhaust flow rate of the compressor is increased, the frozen oil separated by the oil-gas separator is gathered in the exhaust oil pool containing cavity below the oil-gas separator, and due to the fact that the containing cavity is limited in volume, the frozen oil cannot flow back to the inside of the compressor in time, the high-speed rotating exhaust gas rolls up the frozen oil in the exhaust oil pool containing cavity again, the frozen oil is discharged to the outside of the compressor along with the exhaust gas, the oil content of the exhaust gas is increased, and the lubrication of moving parts of the compressor and the performance of a refrigeration system are affected.

Disclosure of Invention

Therefore, the application provides an oil-gas separation subassembly, end cover subassembly and scroll compressor, can solve among the prior art refrigerant oil and come too late backward flow to the compressor inside, lead to high-speed rotatory exhaust to curl up the refrigerant oil in holding the chamber with the exhaust oil pool again to discharge to the outside problem of compressor along with exhaust.

In order to solve the above problems, the present application provides an oil-gas separation assembly, comprising:

the cyclone separation assembly comprises a shell and a core pipe, wherein the upper part of the core pipe is hermetically fixed in the shell;

the oil blocking piece comprises an oil blocking pipe, and the oil blocking pipe is vertically arranged in the shell and is positioned below the core pipe;

the lower portion of the core pipe is inserted into the oil blocking pipe, and the outer diameter of the core pipe is smaller than the inner diameter of the oil blocking pipe.

Optionally, the oil baffle pipe is a blind pipe structure with a closed lower end.

Optionally, a through hole is formed in the side wall of the lower portion of the oil blocking pipe.

Optionally, the through holes are provided in plurality and evenly distributed in the circumferential direction.

Optionally, the depth of the core tube extending into the oil blocking tube is set to be H, the outer diameter of the core tube is set to be D, and H is larger than 0 and smaller than or equal to D.

Optionally, the internal flow area of the oil blocking pipe is set to be S1, the internal flow area of the core pipe on the cross section of the core pipe is set to be S3, and the area surrounded by the outer wall is set to be S2, so that S1-S2 is greater than or equal to S3.

According to another aspect of the present application, there is provided an end cap assembly comprising an oil and gas separation assembly as described above.

Optionally, the end cap assembly comprises a cover, the housing comprising the cover; an exhaust channel is arranged in the cover body, and the core pipe is arranged in the exhaust channel; and a liquid return hole is formed in the cover body, one end of the liquid return hole is communicated with the exhaust channel, and the other end of the liquid return hole is communicated with the inner side of the cover body.

Optionally, the exhaust passage is of an axially-through straight pipe structure, the oil blocking member further includes a fixing portion, and the lower end of the oil blocking pipe is fixed to the fixing portion; the fixing part blocks the bottom end of the exhaust passage.

According to another aspect of the present application, there is provided a scroll compressor comprising an oil and gas separation assembly as described above or an end cover assembly as described above.

The application provides a oil-gas separation subassembly includes: the cyclone separation assembly comprises a shell and a core pipe, wherein the upper part of the core pipe is hermetically fixed in the shell; the oil blocking piece comprises an oil blocking pipe, and the oil blocking pipe is vertically arranged in the shell and is positioned below the core pipe; the lower portion of the core pipe is inserted into the oil blocking pipe, and the outer diameter of the core pipe is smaller than the inner diameter of the oil blocking pipe.

According to the oil baffle pipe, the lower portion of the core pipe is inserted into the oil baffle pipe, the high-speed rotating airflow can only act on the outer portion of the oil baffle pipe, liquid below the core pipe in the oil baffle pipe cannot be rolled up, the liquid can be prevented from entering the core pipe when the high-speed rotating airflow winds, and therefore the exhaust oil content of the scroll compressor can be reduced.

Drawings

FIG. 1 is a schematic view of a portion of a scroll compressor according to an embodiment of the present application;

FIG. 2 is a schematic structural view of an end cap body according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural view of a core tube according to an embodiment of the present application;

fig. 4 is a schematic structural view of an oil baffle according to an embodiment of the present application.

The reference numerals are represented as:

100. a cover body; 101. an exhaust hole; 102. an exhaust passage; 103. an exhaust outlet; 104. an oil return hole; 105. an inner wall of the exhaust passage; 200. a core tube; 201. an inlet of the core tube; 202. the outer wall of the core tube; 300. an oil blocking member; 301. a fixed part; 302. an oil blocking pipe; 303. a cavity; 304. a through hole; 305. the outer wall of the oil baffle pipe; 400. freezing the oil.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the accompanying drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Referring collectively to fig. 1-4, in accordance with an embodiment of the present application, an oil and gas separation assembly, comprises:

the cyclone separation assembly comprises a shell and a core pipe 200, wherein the upper part of the core pipe 200 is hermetically fixed in the shell;

the oil blocking member 300 comprises an oil blocking pipe 302, and the oil blocking pipe 302 is vertically arranged in the shell and is positioned below the core pipe 200;

the lower part of the core tube 200 is inserted into the oil blocking pipe 302, and the outer diameter of the core tube 200 is smaller than the inner diameter of the oil blocking pipe 302.

According to the oil retaining pipe, the lower portion of the core pipe 200 is inserted into the oil retaining pipe 302, high-speed rotating airflow only acts on the outer portion of the oil retaining pipe 302, liquid below the core pipe 200 in the oil retaining pipe 302 cannot be rolled up, the phenomenon that the high-speed rotating airflow winds the liquid into the core pipe 200 can be avoided, and therefore the exhaust oil content of the scroll compressor can be reduced.

Since the inlet of the core tube 200 is positioned in the oil baffle pipe 302 and is generally arranged at the center of the shell, the cyclone is rotated to the center from the inner peripheral wall of the shell, and the cyclone is blocked by the oil baffle pipe 302, so that the liquid at the inlet of the core tube 200 cannot be hoisted by the cyclone.

In some embodiments, the oil baffle pipe 302 is provided as a blind pipe structure with a closed lower end.

The oil blocking pipe 302 is arranged to be of a blind pipe structure, so that the complete separation of liquid inside and outside the oil blocking pipe 302 can be prevented, the influence of cyclone is avoided, and the phenomenon of winding is avoided.

In some embodiments, the sidewall of the lower portion of the oil retaining pipe 302 is provided with a through hole 304.

The through hole 304 is formed in the side wall of the lower portion of the oil blocking pipe 302, so that the same liquid level inside and outside the oil blocking pipe 302 can be guaranteed, the accumulated liquid inside the oil blocking pipe 302 can be conveniently discharged outside the oil blocking pipe 302 smoothly when the accumulated liquid is excessive, and the blocking of the inlet of the core pipe 200 is avoided. Preferably, the through holes 304 are provided in plurality and uniformly distributed circumferentially.

In some embodiments, the depth of the core tube 200 extending into the oil baffle pipe 302 is set as H, and the outer diameter of the core tube 200 is set as D, wherein H is greater than 0 and less than D. Preferably, the internal flow area of the oil blocking pipe 302 is set to S1, the internal flow area of the core pipe 200 is set to S3, and the area surrounded by the outer wall is set to S2, so that S1-S2 is greater than or equal to S3.

In some embodiments, the end cap assembly includes a cap body 100, the housing including the cap body 100; an exhaust channel 102 is arranged in the cover body 100, and the core pipe 200 is arranged in the exhaust channel 102; a liquid return hole is formed in the cover body 100, one end of the liquid return hole is communicated with the exhaust passage 102, and the other end of the liquid return hole is communicated with the inner side of the cover body 100.

An oil-gas separation assembly is arranged on the cover body 100 of the end cover assembly, and separated liquid is returned to the inner side of the cover body 100 through a liquid return hole for recycling.

In some embodiments, the exhaust passage 102 is a straight tube structure passing through in the axial direction, the oil blocking member 300 further includes a fixing portion 301, and the lower end of the oil blocking tube 302 is fixed on the fixing portion 301; the fixing portion 301 blocks the bottom end of the exhaust passage 102.

The exhaust passage 102 is provided with a through straight pipe structure, and the oil blocking piece 300 blocks the bottom end opening of the exhaust passage 102 through the fixing part 301, so that the assembly, disassembly and maintenance are convenient.

A scroll compressor, as shown in fig. 1, includes an end cap assembly including a cap body 100, a core tube 200, an oil baffle 300, and a refrigerant oil 400. The cover body 100 has an exhaust hole 101, an exhaust passage 102, an exhaust outlet 103 and an oil return hole 104, the exhaust hole 101 and the oil return hole 104 are respectively communicated with the exhaust passage 102, and the exhaust outlet 103 is located at the upper part of the exhaust passage 102. The oil blocking member 300 is provided with a fixing portion 301 and an oil blocking pipe 302, the oil blocking member 300 is mounted on the bottom end face of the exhaust passage 102 through the fixing portion 301, the oil blocking pipe 302 extends into the exhaust passage 102, the oil blocking pipe 302 is provided with a cavity 303, and one end, close to the fixing portion 301, of the oil blocking pipe 302 is provided with a through hole 304. The lower portion of the core tube 200 is disposed in the gas discharge passage 102, and the inlet of the core tube 200 protrudes into the inside of the oil baffle tube 302.

The refrigerant of high temperature and high pressure of the scroll compressor is mixed with the refrigeration oil 400, and the refrigerant flows into the exhaust passage 102 from the exhaust hole 101 and rotates and flows downwards along the circumferential direction of the exhaust passage inner wall 105, the circumferential direction of the core pipe outer wall 202 and the circumferential direction of the oil blocking pipe outer wall 305. In the process of rotational flow, because the density of the refrigerant oil 400 in the refrigerant is greater than that of the refrigerant, the refrigerant oil 400 is separated from the refrigerant under the action of the rotational centrifugal force, and flows downwards along the inner wall 105 of the exhaust passage, and finally deposits in the lower cavity of the exhaust passage 102. The freezing oil 400 deposited on the bottom of the exhaust passage 102 partially enters the cavity 303 from the through hole 304, and the liquid level of the freezing oil 400 inside the exhaust passage 102 and the oil baffle pipe 302 is at the same level due to the pressure balance. A part of the refrigerant oil 400 flows back to the inside of the compressor through the oil return hole 104.

The through hole 304 is arranged at the bottommost part of the oil retaining pipe 302, so that the freezing oil 400 can be prevented from being deposited at the bottom of the cavity 303 and not participating in the circulation of the freezing oil 400. Along with the increase of the rotating speed of the compressor, the flow rate of the refrigerant is increased, and the oil separation rate of the oil-gas separation structure is increased. When the amount of the separated refrigeration oil 400 is larger than the amount of the refrigeration oil flowing back to the compressor, the oil level of the refrigeration oil 400 at the bottom of the exhaust passage 102 is gradually increased, and the refrigerant rotating at a high speed stirs the oil level of the refrigeration oil 400 and wins up the refrigeration oil 400 again.

The core tube 200 inlet extends into the interior of the oil retention tube 302. The oil blocking pipe 302 plays a role of shielding, so that the inlet of the core pipe 200 is prevented from being directly exposed in the exhaust channel 102, and the refrigerant rotating at high speed at the outside cannot directly discharge the coiled frozen oil 400 from the inlet of the core pipe 200 to the outside of the compressor; the depth H of the inlet of the core pipe 200 extending into the cavity 303 in the oil blocking pipe 302 is preferably more than 0 and less than or equal to D, and D is the characteristic size of the outer wall surface of the oil-gas separator; the refrigerant after oil-gas separation enters the oil baffle pipe 302 from the air inlet at the upper end face of the oil baffle pipe 302, and is finally discharged to the exhaust outlet 103 through the inlet of the core pipe 200.

It is easily understood by those skilled in the art that the above embodiments can be freely combined and superimposed without conflict.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.

Claims

1. An oil and gas separation assembly, comprising:

the cyclone separation assembly comprises a shell and a core pipe (200), wherein the upper part of the core pipe (200) is hermetically fixed in the shell;

the oil blocking piece (300) comprises an oil blocking pipe (302), and the oil blocking pipe (302) is vertically arranged in the shell and is positioned below the core pipe (200);

the lower part of the core tube (200) is inserted into the oil blocking tube (302), and the outer diameter of the core tube (200) is smaller than the inner diameter of the oil blocking tube (302).

2. The oil-gas separation assembly according to claim 1, characterized in that the oil baffle pipe (302) is provided as a blind pipe structure with a closed lower end.

3. The oil-gas separation assembly as claimed in claim 2, wherein the sidewall of the lower part of the oil baffle pipe (302) is provided with a through hole (304).

4. The oil-gas separation assembly according to claim 3, characterized in that said through holes (304) are provided in plurality and uniformly distributed circumferentially.

5. The oil-gas separation assembly according to claim 1, wherein the depth of the core tube (200) extending into the oil baffle tube (302) is set as H, the outer diameter of the core tube (200) is set as D, and 0 < H ≦ D is satisfied.

6. The oil-gas separation assembly according to claim 1, wherein the internal flow area of the oil blocking pipe (302) is S1, the internal flow area of the core pipe (200) in the cross section is S3, the area enclosed by the outer wall is S2, and S1-S2 is more than or equal to S3.

7. An end cap assembly comprising the oil and gas separation assembly of any one of claims 1-6.

8. The end cap assembly of claim 7, wherein the end cap assembly includes a cap body (100), the housing including the cap body (100); an exhaust channel (102) is arranged in the cover body (100), and the core pipe (200) is arranged in the exhaust channel (102); and a liquid return hole is formed in the cover body (100), one end of the liquid return hole is communicated with the exhaust channel (102), and the other end of the liquid return hole is communicated with the inner side of the cover body (100).

9. The end cover assembly according to claim 8, wherein the exhaust passage (102) is provided as an axially-through straight pipe structure, the oil blocking member (300) further comprises a fixing portion (301), and the lower end of the oil blocking pipe (302) is fixed on the fixing portion (301); the fixing part (301) seals the bottom end of the exhaust passage (102).

10. A scroll compressor including an oil and gas separation assembly according to any one of claims 1 to 6 or an end cap assembly according to any one of claims 7 to 9.