CN218376904U

CN218376904U - Compressor oil return structure and compressor assembly

Info

Publication number: CN218376904U
Application number: CN202222022748.4U
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Chongqing Super Force Electric Appliance Co ltd
Current assignee: Chongqing Super Force Electric Appliance Co ltd
Priority date: 2022-08-02
Filing date: 2022-08-02
Publication date: 2023-01-24
Anticipated expiration: 2032-08-02

Abstract

The application provides a compressor oil return structure and a compressor assembly, which relate to the field of compressors and comprise a rear shell and an oil-gas separator, wherein the rear shell is provided with a high-pressure cavity, an oil-gas separation cavity, an exhaust hole, a guide cavity and a first oil storage cavity, and the high-pressure cavity and the exhaust hole are communicated with the oil-gas separation cavity; the guide cavity is provided with a port and a second port, the cross-sectional area of the guide cavity is gradually reduced in the direction from the first port to the second port, the first port is communicated with the oil-gas separation cavity, and the second port is communicated with the first oil storage cavity; the oil-gas separator is arranged in the oil-gas separation cavity and used for separating oil-gas mixture in the oil-gas separation cavity. During operation, the oil quantity discharged from the exhaust holes along with the refrigerant can be reduced, the oil quantity participating in heat exchange is small, the heat exchange efficiency is not easily influenced, and the efficiency of the whole machine is not easily influenced. And the oil amount that flows back to the inside of the compressor is increased, the lubricating effect of each part in the running process of the compressor is good, and the abrasion is reduced.

Description

Compressor oil return structure and compressor assembly

Technical Field

The utility model relates to a compressor field particularly, relates to a compressor oil return structure and compressor assembly.

Background

The compressor is a driven fluid machine for lifting low-pressure gas into high-pressure gas, is a heart of a refrigeration system, can suck low-temperature and low-pressure refrigerant gas from a gas suction pipe in the operation process, compresses the refrigerant gas through a scroll structure, and then discharges the high-temperature and high-pressure refrigerant gas to an exhaust pipe to provide power for a refrigeration cycle. The compressor may be applied to an in-vehicle air conditioning system. During the operation of the compressor, the oil-gas mixture pressurized by the vortex plate structure is discharged into the high-pressure cavity, refrigerant gas is discharged from the exhaust hole after the oil-gas mixture passes through the oil-gas separator, and enters the air conditioning system to participate in heat exchange, and oil liquid flows back into the compressor through the oil return structure to participate in lubrication.

The inventor researches and discovers that the oil return structure of the compressor in the prior art has the following defects:

oil is easily discharged from the exhaust holes under the driving of refrigerant gas, so that the heat exchange efficiency is influenced, and the efficiency of the whole machine is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a compressor oil return structure and compressor assembly, it can reduce along with refrigerant gas outgoing's fluid, is difficult for influencing air conditioner normal operating, and heat exchange efficiency is high, and complete machine operating efficiency is high.

The embodiment of the utility model is realized like this:

in a first aspect, the utility model provides a compressor oil return structure, include:

the oil-gas separator comprises a rear shell and an oil-gas separator, wherein the rear shell is provided with a high-pressure cavity, an oil-gas separation cavity, an exhaust hole, a guide cavity and a first oil storage cavity, and the high-pressure cavity and the exhaust hole are communicated with the oil-gas separation cavity; the guide cavity is provided with a first port and a second port, the cross-sectional area of the guide cavity is gradually reduced in the direction from the first port to the second port, the first port is communicated with the oil-gas separation cavity, and the second port is communicated with the first oil storage cavity; the oil-gas separator is arranged in the oil-gas separation cavity and used for separating oil-gas mixtures in the oil-gas separation cavity.

In an alternative embodiment, the guide chamber and the first oil storage chamber are communicated through a connecting hole, and the diameter of the connecting hole is not larger than the diameter of the second port of the guide chamber.

In an alternative embodiment, the cross-sectional profile of the guide lumen is circular.

In an alternative embodiment, a filter screen is arranged in the first oil storage chamber.

In an optional implementation manner, the oil return structure of the compressor further comprises a fixed scroll, a second oil storage cavity is arranged on the fixed scroll, the fixed scroll is in butt joint with the rear shell, and the second oil storage cavity is communicated with the first oil storage cavity.

In an alternative embodiment, the second oil storage chamber is provided as an arc-shaped chamber extending in a circumferential direction of the fixed scroll.

In an alternative embodiment, the second oil storage chamber is provided as an annular chamber extending around the axis of the fixed scroll.

In an alternative embodiment, two sealing rings are arranged between the fixed scroll and the rear housing, and the two sealing rings are positioned on two sides of the second oil storage cavity in the radial direction of the fixed scroll.

In an optional implementation mode, a backflow hole is formed in the fixed scroll, a flow equalizing pipe is arranged in the backflow hole, and the flow equalizing pipe is communicated with the second oil storage cavity.

In a second aspect, the present invention provides a compressor assembly, the compressor assembly includes:

the compressor oil return structure according to any one of the preceding embodiments.

The embodiment of the utility model provides a beneficial effect is:

in summary, the compressor oil return structure provided by this embodiment, in the operation process of the compressor, the refrigerant is discharged into the high-pressure cavity together with the mixture that oil constitutes after being compressed, then enter into the oil-gas separation chamber, refrigerant and oil in the mixture are separated after passing through the oil-gas separator, most of refrigerant is directly discharged from the exhaust hole, a small part of refrigerant moves to the guide chamber along with oil, then under the effect of the guide chamber, oil moves to the small region from the large region in space, the flow rate of oil increases, oil can enter into the first oil storage chamber fast, so, the oil volume that is discharged from the exhaust hole along with the refrigerant is greatly reduced, the oil volume that participates in heat exchange is reduced, and heat exchange efficiency is not easily influenced. Meanwhile, the guide hole is in a gradual change type, the area enclosed by the guide hole is gradually reduced from the first port to the second port, the second port is close to the first oil storage chamber, the contact area of oil liquid and refrigerant is gradually reduced from the first port to the second port, and then the probability that the oil liquid is carried to the exhaust hole by the refrigerant and is discharged from the exhaust hole is reduced. That is to say, refrigerant and fluid area of contact are big more, and fluid is taken away by the refrigerant more easily, and the structural design of bullport for refrigerant and fluid are close to first oil storage chamber more, and the area of contact of refrigerant and fluid is little less, and the refrigerant is difficult for driving fluid towards the exhaust hole motion of keeping away from first oil storage chamber more, reduces fluid from exhaust hole exhaust volume. So, also can increase the inside lubricated fluid volume of participating in of entering compressor, the lubricated effect of compressor inside moving part is good, and wearing and tearing are little, and the operation is reliable and stable, and is not fragile, increase of service life reduces the running cost.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is the utility model discloses compressor oil return structure's schematic structure diagram.

Icon:

100-a rear housing; 110-a high pressure chamber; 120-oil-gas separation chamber; 130-vent hole; 140-a guide chamber; 150-a first reservoir chamber; 160-connecting hole; 200-an oil-gas separator; 300-static scroll pan; 310-a second reservoir chamber; 400-a filter screen; 500-flow averaging tube.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are usually placed when used, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element indicated must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

At present, in the operation process of a compressor, a mixture mainly composed of a refrigerant and oil is compressed and pressurized by a scroll structure and then discharged into a high-pressure cavity 110 of a rear shell 100, then the refrigerant and the oil mixture in the high-pressure cavity 110 are separated by an oil-gas separator 200, the refrigerant is discharged from an exhaust hole 130, and the oil flows back into a compressor oil pool. Because the through-hole and the high-pressure chamber 110 intercommunication of fluid backward flow, the area of the two intercommunication is big, and the refrigerant that gets into in the high-pressure chamber 110 easily flows to fluid backward flow through-hole department, and the refrigerant is big with the area of contact of the fluid of through-hole department, has increased the refrigerant and has taken away the probability of fluid from exhaust hole 130, so, the fluid volume in the refrigerant that gets into air conditioning system and carry out the heat transfer increases, and heat exchange efficiency is low, and complete machine is inefficient. Meanwhile, oil entering the air conditioning system to participate in heat exchange is increased, oil flowing back to an oil pool in the compressor is less, and running parts in the compressor, such as bearings, are poor in lubricating effect and easy to wear.

In view of this, the designer has designed a compressor oil return structure, can reduce the fluid volume along with the refrigerant from exhaust hole 130 exhaust, and the fluid volume of participating in the heat transfer is few, is difficult for influencing heat exchange efficiency, is difficult for influencing complete machine efficiency. And the oil quantity that flows back to the inside of compressor increases, and the lubrication effect of each part is good in the compressor operation in-process, reduces wearing and tearing.

Referring to fig. 1, in the present embodiment, the oil return structure of the compressor includes a rear housing 100 and an oil-gas separator 200, the rear housing 100 is provided with a high pressure chamber 110, an oil-gas separation chamber 120, a vent hole 130, a guide chamber 140 and a first oil storage chamber 150, and the high pressure chamber 110 and the vent hole 130 are both communicated with the oil-gas separation chamber 120; the guide chamber 140 has a first port and a second port, the cross-sectional area of the guide chamber 140 gradually decreases in a direction from the first port to the second port, the first port communicates with the oil-gas separation chamber 120, and the second port communicates with the first oil reservoir chamber 150; the oil-gas separator 200 is arranged in the oil-gas separation chamber 120 and is used for separating oil-gas mixture in the oil-gas separation chamber 120.

The working principle of the oil return structure of the compressor provided by the embodiment is as follows:

in the operation process of the compressor, a mixture of compressed refrigerants and oil is discharged into the high-pressure cavity 110 and then enters the oil-gas separation cavity 120, the refrigerants and the oil in the mixture are separated after passing through the oil-gas separator 200, most of the refrigerants are directly discharged from the exhaust hole 130, and a small part of the refrigerants move to the guide cavity 140 along with the oil. Because the guide chamber 140 is the gradual change formula chamber, under the effect in guide chamber 140, fluid moves to the little region in space from the region that the space is big, and the velocity of flow of fluid increases, and fluid can enter into first oil storage chamber 150 fast, and fluid is difficult for stopping in high pressure chamber 110, so, can reduce along with the refrigerant from the fluid volume of exhaust hole 130 exhaust together, the fluid volume of participating in the heat transfer reduces, is difficult for influencing heat exchange efficiency. Meanwhile, the guide hole is a gradual-change chamber, the area enclosed by the guide hole is gradually reduced from the first port to the second port, the second port is close to the first oil storage chamber 150, the contact area between the oil liquid and the refrigerant is gradually reduced from the first port to the second port, and the probability that the oil liquid is carried to the exhaust hole 130 by the refrigerant and is discharged from the exhaust hole 130 is further reduced. That is to say, refrigerant and fluid area of contact are big more, and fluid is taken away by the refrigerant more easily, and the structural design of bullport for refrigerant and fluid are close to first oil storage chamber 150 more, and the area of contact of refrigerant and fluid is little less, and the refrigerant is difficult more to drive fluid and moves towards the exhaust hole 130 of keeping away from first oil storage chamber 150, reduces fluid from exhaust hole 130 exhaust volume. So, also can increase the inside lubricated fluid volume of participating in of entering compressor, the lubricated effect of compressor inside moving part is good, and wearing and tearing are little, and the operation is reliable and stable, not fragile, increase of service life reduces the running cost.

In this embodiment, optionally, the high-pressure chamber 110 is communicated with the oil-gas separation chamber 120 through a through hole, the oil-gas separation chamber 120 is a long-strip-shaped chamber, the vent hole 130 is located at one end of the oil-gas separation chamber 120, the guiding chamber 140 is located at the other end of the oil-gas separation chamber 120, in other words, the vent hole 130 is communicated with one end of the oil-gas separation chamber 120, and the guiding chamber 140 is communicated with the other end of the oil-gas separation chamber 120. The cross-sectional profile of the guide lumen 140 may be circular, elliptical, or polygonal. In this embodiment, the cross-sectional profile of the guide cavity 140 is circular, which is convenient for processing, has small stress and is not easy to crack. That is, the cross-sectional diameter of the guide chamber 140 is gradually reduced in a direction from the first port to the second port, and the guide chamber 140 has a constricted structure in a direction from the discharge hole 130 to the first oil reservoir chamber 150.

In this embodiment, optionally, the first oil storage chamber 150 is configured as a strip-shaped chamber, the length direction of the first oil storage chamber 150 is approximately perpendicular to the length direction of the oil-gas separation chamber 120, and the extending directions of the first oil storage chamber and the oil-gas separation chamber have an included angle, so that the width and the position in the length direction of the rear housing 100 can be reasonably utilized, and the volume of the rear housing 100 can be reduced. Further, be provided with connecting hole 160 on rear housing 100, connecting hole 160 communicates the second port and the first oil storage chamber 150 of guide chamber 140, and connecting hole 160 sets up to the circular port, and the aperture of connecting hole 160 is the same basically with the diameter of second port, and through addding connecting hole 160, the diameter of connecting hole 160 is little, and fluid is fast when flowing in connecting hole 160, and has further reduced the area of contact of fluid with the refrigerant, has reduced the probability that fluid was taken away by the refrigerant. That is to say, after the refrigerant and the oil are separated at the oil-gas separator 200, the oil enters the guide chamber 140, and under the action of the guide chamber 140, the oil does not directly enter the first oil storage chamber 150, but enters the first oil storage chamber 150 through the connection hole 160, and the aperture of the connection hole 160 is small, so that the oil has a small contact area with the refrigerant when flowing at the connection hole 160, and is not easy to be discharged from the exhaust hole 130 along with the refrigerant.

In this embodiment, optionally, a filter screen 400 is disposed in the first oil storage chamber 150, and the filter screen 400 may be fixed in the first oil storage chamber 150 by a press ring. Specifically, a port of the first oil storage cavity 150, which is far away from the guide cavity 140, is provided with a groove, the filter screen 400 and the pressing ring are embedded in the groove, the pressing ring is located on one side, which is far away from the groove, of the filter screen 400, and can be in interference fit with the groove, and the pressing ring presses the filter screen 400 on the groove bottom wall of the groove. In other embodiments, the clamping ring can also be in the recess by the spiro union, and at this moment, the recess is the circular recess, is provided with the internal thread on the groove perisporium of recess, and the clamping ring is the ring, is provided with the external screw thread on the outer peripheral face of clamping ring, and the dismouting of the clamping ring of being convenient for is convenient for filter screen 400's dismouting.

In this embodiment, the oil return structure of the compressor may further include a fixed scroll 300, the fixed scroll 300 is provided with a second oil storage chamber 310, the fixed scroll 300 is abutted to the rear housing 100, and the second oil storage chamber 310 is communicated with the first oil storage chamber 150. Alternatively, second oil storage chamber 310 may be provided as a bar-shaped chamber, for example, second oil storage chamber 310 is provided as an arc-shaped chamber, second oil storage chamber 310 extending in the circumferential direction of fixed scroll 300, and further, second oil storage chamber 310 is provided as an annular chamber, second oil storage chamber 310 extending around the axis of fixed scroll 300. So, can enter into second oil storage chamber 310 after filter screen 400 from first oil storage chamber 150 when fluid, because first oil storage chamber 150 and the cooperation of second oil storage chamber 310, increased the oil reserve, increased the oil storage capacity, the fluid that is separated out in oil-gas separation chamber 120 is discharged first oil storage chamber 150 and second oil storage chamber 310 and is kept in, can not long-pending more fluid of staying in oil-gas separation chamber 120, and then also reduced the probability that fluid is taken out from exhaust hole 130 by the refrigerant.

In this embodiment, optionally, two sealing rings are disposed between the fixed scroll 300 and the rear housing 100, and the two sealing rings are located at two sides of the second oil storage cavity 310 in the radial direction of the fixed scroll 300, so that the sealing performance between the fixed scroll 300 and the rear housing 100 is enhanced by the sealing rings, and leakage is not easily generated.

In this embodiment, optionally, a backflow hole communicated with the second oil storage chamber 310 is further disposed on the fixed scroll 300, an oil equalizing pipe 500 is disposed in the backflow hole, the oil in the second oil storage chamber 310 flows back to the oil storage pool inside the compressor through the oil equalizing pipe 500, and the oil equalizing pipe 500 can adjust the flow rate of the oil, so that the oil can stably enter the oil storage pool, thereby participating in lubrication of internal structural components of the compressor.

In the oil return structure of the compressor provided in this embodiment, the separated oil can quickly enter the first oil storage chamber 150 and the second oil storage chamber 310 to be stored, and is not easy to accumulate in the oil-gas separation chamber 120 and to be taken away from the air vent 130 by the refrigerant. And, fluid loops through guide chamber 140, connecting hole 160 and first oil storage chamber 150 intercommunication, and guide chamber 140 has the effect that guide fluid gets into first oil storage chamber 150, avoids during fluid refluxes to oil-gas separation chamber 120, and simultaneously, the aperture of connecting hole 160 is little, and the cross-sectional area is little when fluid is in connecting hole 160, and is little with the area of refrigerant contact, is difficult for being taken away by the refrigerant. In conclusion, the oil return structure of the compressor provided in the embodiment reduces the probability of taking oil away by the refrigerant, and the oil is not easy to be discharged from the exhaust hole 130, so that the efficiency of the whole compressor is not easily affected.

It should be noted that the gas-oil separator 200 provided in the present embodiment is a conventionally known structure, and in order to avoid repetitive redundancy, the present embodiment will not be specifically described.

The embodiment also provides a compressor assembly, which comprises the compressor oil return structure mentioned in the embodiment, and the compressor assembly has high refrigeration efficiency and high overall operation efficiency in the operation process.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A compressor oil return structure, characterized by comprising:

2. The compressor oil return structure according to claim 1, wherein:

the guide cavity is communicated with the first oil storage cavity through a connecting hole, and the aperture of the connecting hole is not larger than the aperture of the second port of the guide cavity.

3. The compressor oil return structure according to claim 1, wherein:

the cross-sectional profile of the guide lumen is circular.

4. The compressor oil return structure according to claim 1, wherein:

a filter screen is arranged in the first oil storage cavity.

5. The compressor oil return structure according to claim 1, wherein:

the compressor oil return structure further comprises a static vortex disc, a second oil storage cavity is arranged on the static vortex disc, the static vortex disc is in butt joint with the rear shell, and the second oil storage cavity is communicated with the first oil storage cavity.

6. The compressor oil return structure according to claim 5, wherein:

the second oil storage cavity is arranged to be an arc-shaped cavity and extends along the circumferential direction of the fixed scroll.

7. The compressor oil return structure according to claim 5, wherein:

the second oil storage chamber is provided as an annular chamber and extends around the axis of the fixed scroll.

8. The compressor oil return structure according to claim 5, wherein:

two sealing rings are arranged between the fixed scroll disk and the rear shell, and the two sealing rings are positioned on two sides of the second oil storage cavity in the radial direction of the fixed scroll disk.

9. The compressor oil return structure according to claim 5, wherein:

and a backflow hole is formed in the static scroll disc, a flow equalizing pipe is arranged in the backflow hole, and the flow equalizing pipe is communicated with the second oil storage cavity.

10. A compressor assembly, comprising:

the compressor oil return structure of any one of claims 1 to 9.