CN217233802U

CN217233802U - End cover for electric compressor

Info

Publication number: CN217233802U
Application number: CN202220004063.4U
Authority: CN
Inventors: 袁森; 王刚; 周之茂; 刘烨
Original assignee: Foshan Cheyijia New Energy Technology Co ltd
Current assignee: Foshan Cheyijia New Energy Technology Co ltd
Priority date: 2022-01-04
Filing date: 2022-01-04
Publication date: 2022-08-19
Anticipated expiration: 2032-01-04

Abstract

The utility model discloses an end cover for an electric compressor, which comprises an end cover body, wherein an exhaust joint is arranged on the end cover body, one end surface of the exhaust joint is provided with an exhaust interface, one side of the exhaust interface is provided with a threaded hole, an exhaust installing port is arranged inside the exhaust joint, one end of the exhaust installing port is provided with an oil separator installing hole, one end of the oil separator installing hole is provided with a first-level oil outlet, one side of the front surface of the end cover body is provided with a relief valve installing threaded hole, the bottom of the end cover body is provided with a connecting leg, a plurality of bolt through holes are uniformly arranged at the outer side edge of the end cover body, the end cover is designed with a two-level oil-gas separation structure, compared with the traditional one-level oil-gas separation structure, the end cover has better separation effect on oil in a refrigerant, the loss of oil in the electric compressor can be greatly reduced, and the problems of lubrication and sealing failure caused by the oil shortage in the electric compressor are well solved, the service life of the compressor is greatly prolonged.

Description

End cover for electric compressor

Technical Field

The utility model relates to a compressor field specifically is an end cover for electric compressor.

Background

The compressor is a driven fluid machine that raises low-pressure gas to high-pressure gas, and is the heart of a refrigeration system. The high-temperature and high-pressure refrigerant gas is discharged to the exhaust pipe to provide power for the refrigeration cycle after the low-temperature and low-pressure refrigerant gas is sucked from the air suction pipe and is compressed by driving the meshing of the scroll plate through the operation of the motor; the compressor is widely applied in various fields, the compressor is composed of a plurality of structures, particularly an end cover of the compressor, the end cover of the existing compressor has a single function, and is often provided with a first-stage oil-gas separation structure, so that the separation effect on oil in a refrigerant is poor, a large amount of oil in the electric compressor is lost, the problems that the oil in the electric compressor is lack of oil, the lubrication cannot be realized, the sealing fails are caused, and the service life of the compressor is greatly shortened; an end cover for a motor-driven compressor is provided for this purpose.

Disclosure of Invention

The object of the utility model is to provide an end cover for electric compressor to solve the problem that above-mentioned background art provided to the defect to prior art.

In order to achieve the above object, the utility model provides a following technical scheme: an end cover for an electric compressor comprises an end cover body, wherein an exhaust joint is arranged on the end cover body, an exhaust interface is arranged on one end face of the exhaust joint, a threaded hole is formed in one side of the exhaust interface, an exhaust mounting hole is formed in the exhaust joint, an oil separator mounting hole is formed in one end of the exhaust mounting hole, a primary oil outlet is formed in one end of the oil separator mounting hole, a relief valve mounting threaded hole is formed in one side of the front face of the end cover body, a connecting leg is arranged at the bottom of the end cover body, a plurality of bolt through holes are uniformly formed in the edge of the outer side of the end cover body, positioning pin holes are formed in two ends of the back face of the end cover body, a secondary oil sub-cavity, a secondary exhaust cavity, a pressure relief cavity, an oil storage chamber and an exhaust cavity are formed in the back face of the end cover body, a gap A is formed in one side of the secondary oil sub-cavity, and a secondary exhaust hole is formed in the secondary exhaust cavity, one side of pressure release chamber is equipped with breach B, the opposite side of pressure release chamber is equipped with breach C, be equipped with the exhaust hole on the exhaust chamber, one side of oil storage chamber is equipped with second grade oil pump oil passageway, the opposite side of oil storage chamber is equipped with the first grade oil branch oil-out, one side of first grade oil-out is equipped with breach D.

As an optimal technical scheme of the utility model, the middle part of connecting the leg is equipped with the through-hole, the both ends of connecting the leg all are equipped with the counter bore.

As a preferred technical scheme of the utility model, the end cover body passes through locating pin hole and locating pin and compressor housing location fit, the end cover body passes through the bolt, seals up pad and bolt via hole to be fixed on compressor housing.

As a preferred technical scheme of the utility model, the exhaust connects and links to each other with the air conditioner pipe is fixed through bolt and screw hole, the internally mounted of oil content ware mounting hole has the oil content ware.

As a preferred technical scheme of the utility model, the one-level oil divides the chamber to link to each other with the exhaust hole, the one-level oil divides the chamber to link to each other with the exhaust chamber through the exhaust hole.

As a preferred technical scheme of the utility model, secondary oil divides the chamber to link to each other through breach D and oil storage chamber, secondary oil divides the chamber to link to each other through breach A and second grade exhaust chamber.

As an optimal technical scheme of the utility model, the pressure release chamber passes through breach C and links to each other with the exhaust chamber, the pressure release chamber passes through breach B and links to each other with second grade exhaust chamber.

The utility model has the advantages that: this end cover design has two-stage oil-gas separation structure, compares in traditional one-level oil-gas separation structure, and this end cover is better to the separation effect of oil in the refrigerant, can reduce the loss of the inside fluid of electric compressor by a wide margin, fine solution the inside lack of oil lubrication and the sealed inefficacy problem that leads to of electric compressor, improved the life-span of compressor by a wide margin.

Drawings

Fig. 1 is a schematic front structural view of the present invention;

fig. 2 is a schematic view of the back structure of the present invention;

fig. 3 is a cross-sectional view of the present invention.

In the figure: end cover body 1, bolt via hole 2, exhaust joint 3, screw hole 4, relief valve installation screw hole 5, second grade oil branch chamber 6, exhaust hole 7, second grade exhaust hole 8, breach A9, second grade exhaust chamber 10, breach B11, pressure relief chamber 12, breach C13, second grade oil pump oil passageway 14, oil storage chamber 15, breach D16, first grade oil branch oil-out 17, exhaust chamber 18, location pinhole 19, exhaust installing port 20, oil content ware mounting hole 21, first grade oil branch chamber 22.

Detailed Description

The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the protection scope of the present invention can be clearly and clearly defined.

Example (b): referring to fig. 1-3, the present invention provides a technical solution: an end cover for an electric compressor comprises an end cover body 1, wherein an exhaust joint 3 is arranged on the end cover body 1, an exhaust interface is arranged on one end face of the exhaust joint 3, a threaded hole 4 is formed in one side of the exhaust interface, an exhaust mounting hole 20 is formed in the exhaust joint 3, an oil separator mounting hole 21 is formed in one end of the exhaust mounting hole 20, a primary oil outlet 17 is formed in one end of the oil separator mounting hole 21, a relief valve mounting threaded hole 5 is formed in one side of the front face of the end cover body 1, a connecting leg is arranged at the bottom of the end cover body 1, a plurality of bolt through holes 2 are uniformly formed in the outer edge of the end cover body 1, positioning pin holes 19 are formed in two ends of the back face of the end cover body 1, a secondary oil separation cavity 6, a secondary exhaust cavity 10, a relief cavity 12, an oil storage chamber 15 and an exhaust cavity 18 are formed in the back face of the end cover body 1, a notch A9 is formed in one side of the secondary oil separation cavity 6, and a secondary exhaust hole 8 is formed in the secondary exhaust cavity 10, a notch B11 is formed in one side of the pressure relief cavity 12, a notch C13 is formed in the other side of the pressure relief cavity 12, an exhaust hole 7 is formed in the exhaust cavity 18, a secondary oil pump oil channel 14 is formed in one side of the oil storage chamber 15, a primary oil outlet 17 is formed in the other side of the oil storage chamber 15, and a notch D16 is formed in one side of the primary oil outlet 17.

The middle part of the connecting leg is provided with a through hole, and the two ends of the connecting leg are provided with counter bores.

The end cover body 1 is matched with the compressor shell in a positioning mode through the positioning pin hole 19 and the positioning pin, and the end cover body 1 is fixed on the compressor shell through the bolt, the sealing gasket and the bolt through hole 2.

The exhaust joint 3 is fixedly connected with the air conditioning pipe through a bolt and a threaded hole 4, and an oil separator is arranged in the oil separator mounting hole 21.

The primary oil separation chamber 22 is connected with the exhaust hole 7, and the primary oil separation chamber 22 is connected with the exhaust chamber 18 through the exhaust hole 7.

The secondary oil separation chamber 6 is connected with the oil storage chamber 15 through a notch D16, and the secondary oil separation chamber 6 is connected with the secondary exhaust chamber 10 through a notch A9.

The pressure relief cavity 12 is connected to the vent cavity 18 through a notch C13, and the pressure relief cavity 12 is connected to the secondary vent cavity 10 through a notch B11.

The working principle is as follows: an end cover for an electric compressor comprises an end cover body 1, a bolt through hole 2, an exhaust joint 3, a threaded hole 4, a pressure relief valve mounting threaded hole 5, a secondary oil content cavity 6, an exhaust hole 7, a secondary exhaust hole 8, a notch A9, a secondary exhaust cavity 10, a notch B11, a pressure relief cavity 12, a notch C13, a secondary oil content pump oil channel 14, an oil storage chamber 15, a notch D16, a primary oil content oil outlet 17, an exhaust cavity 18, a positioning pin hole 19, an exhaust mounting hole 20, an oil content device mounting hole 21 and a primary oil content cavity 22; a plurality of bolt through holes 2 are formed in the outer side of the end cover and used for installing and fastening the end cover, and two positioning pin holes 19 are formed in the end face of the end cover and used for assembling, matching and positioning; the end part of the end cover is provided with an exhaust joint 3 and a threaded hole 4 for installing an air conditioner pipe, an exhaust mounting hole 20 is processed in the exhaust joint 3 and used for assembling and sealing the air conditioner pipe joint, and an oil separator mounting hole 21 is processed below the exhaust mounting hole and used for mounting an oil separator; a primary oil separation cavity 22 is formed below the oil separator mounting hole 21, so that the primary separation of oil and a refrigerant in a refrigerant and oil mixture is realized; the cavity of the end cover is internally provided with an exhaust cavity 18, a pressure relief cavity 12, a secondary oil separation cavity 6, a secondary exhaust cavity 10, an oil storage chamber 15 and other structures; the mixture of the refrigerant and the oil discharged by the compression structure of the compressor is discharged to the exhaust cavity 18, after being buffered by the exhaust cavity, the mixture enters the primary oil separating cavity 22 through the exhaust hole 7 in the exhaust cavity 18, and is separated for the first time through the oil separator in the primary oil separating cavity; the separated refrigerant flows through the oil separator and is discharged to the air conditioning pipe through the exhaust mounting port 20 to enter the circulation; the mixture of the oil and the refrigerant separated by the primary oil separating cavity 22 flows out from the primary oil outlet 17 and enters the secondary oil separating cavity 6, after the mixture of the refrigerant and the oil enters the secondary oil separating cavity 6 with larger volume from the primary oil separating cavity 22 with smaller volume, the flow velocity of the oil and the refrigerant which are very combined is obviously reduced, and the oil in the mixture is further separated; the separated oil liquid flows to the oil storage chamber 15 through the notch D16 under the action of gravity, and then is sent to a lubricated part in a low-pressure area through the secondary oil pump oil passage under the action of pressure; meanwhile, the refrigerant after secondary oil separation enters a secondary exhaust cavity 10 through a notch A9, is buffered in the secondary exhaust cavity 10 and then is exhausted to an exhaust mounting port 20 through a secondary exhaust hole 8, and enters an air conditioning pipe for circulation; the mixture of the refrigerant and the oil discharged by the compression structure of the compressor is discharged to the exhaust cavity 18, after being buffered by the exhaust cavity 18, part of the mixture enters the pressure relief cavity 12 through the notch C13 with a smaller sectional area, then enters the secondary exhaust cavity 10 through the notch B11, and is discharged through the secondary exhaust hole 8, because the sectional areas of the notch C13 and the notch B11 are smaller, the mixture of the oil and the refrigerant in the exhaust cavity is throttled when flowing through the notch C13 and the notch B11, a certain degree of oil separation is realized, the separated oil flows back to the exhaust cavity 18 through the notch A9 and the pressure relief cavity 12 under the action of gravity, meanwhile, the oil content of the mixture in the pressure relief cavity 12 is lower than that of the exhaust cavity 18, when pressure relief is needed, the oil content of the mixture discharged from the pressure relief cavity 12 is relatively low, the loss of the oil in the compressor during pressure relief is reduced, and the service life of the compressor is prolonged.

Compared with the traditional one-stage oil-gas separation structure, the end cover has better separation effect on oil in a refrigerant, can greatly reduce the loss of oil in the electric compressor, well solves the problems of lubrication and sealing failure caused by oil shortage in the electric compressor, and greatly prolongs the service life of the compressor; meanwhile, the end cover is different from the traditional end cover of the compressor in structure, the pressure relief cavity 12 is designed on the upper part beside the exhaust cavity 18, the pressure relief valve is not installed inside the exhaust cavity 18 any more, but at the position of the pressure relief cavity 12, because the refrigerant and oil mixture in the exhaust cavity are not separated by oil, the oil content in the mixture is more, when the pressure in the end cover is too high and needs to be relieved, the refrigerant in the pressure relief cavity 12 is discharged, but the high oil-containing mixture in the exhaust cavity 18 is discharged, so that the internal oil loss of the compressor under abnormal conditions is reduced, and the service life of the compressor is further prolonged.

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention.

Claims

1. End cover for an electric compressor, comprising an end cover body (1), characterized in that: be equipped with on end cover body (1) exhaust joint (3), an end face that exhaust joint (3) was equipped with the exhaust interface, one side of exhaust interface is equipped with screw hole (4), the inside of exhaust joint (3) is equipped with exhaust installing port (20), the one end of exhaust installing port (20) is equipped with oil content ware mounting hole (21), the one end of oil content ware mounting hole (21) is equipped with one-level oil content oil-out (17), front one side of end cover body (1) is equipped with relief valve mounting screw hole (5), the bottom of end cover body (1) is equipped with the connecting leg, the outside edge of end cover body (1) evenly is equipped with a plurality of bolt via hole (2), the back both ends of end cover body (1) all are equipped with location pinhole (19), the inside second oil branch chamber (6) that is equipped with of back of end cover body (1), Second grade exhaust chamber (10), pressure release chamber (12), oil storage chamber (15) and exhaust chamber (18), one side that the secondary oil divides chamber (6) is equipped with breach A (9), be equipped with second grade exhaust hole (8) on second grade exhaust chamber (10), one side of pressure release chamber (12) is equipped with breach B (11), the opposite side of pressure release chamber (12) is equipped with breach C (13), be equipped with exhaust hole (7) on exhaust chamber (18), one side of oil storage chamber (15) is equipped with second grade oil pump oil passageway (14), the opposite side of oil storage chamber (15) is equipped with one-level oil content oil-out (17), one side of one-level oil content oil-out (17) is equipped with breach D (16).

2. An end cover for a motor-driven compressor as set forth in claim 1, wherein: the middle part of the connecting leg is provided with a through hole, and both ends of the connecting leg are provided with counter bores.

3. An end cover for a motor-driven compressor as set forth in claim 1, wherein: the end cover body (1) is matched with the compressor shell in a positioning mode through a positioning pin hole (19) and a positioning pin, and the end cover body (1) is fixed on the compressor shell through a bolt, a sealing gasket and a bolt through hole (2).

4. An end cover for a motor-driven compressor as claimed in claim 1, wherein: the exhaust joint (3) is fixedly connected with the air-conditioning pipe through a bolt and a threaded hole (4), and the oil separator is arranged in the oil separator mounting hole (21).

5. An end cover for a motor-driven compressor as set forth in claim 1, wherein: the primary oil separation cavity (22) is connected with the exhaust hole (7), and the primary oil separation cavity (22) is connected with the exhaust cavity (18) through the exhaust hole (7).

6. An end cover for a motor-driven compressor as set forth in claim 1, wherein: the secondary oil separation cavity (6) is connected with the oil storage chamber (15) through a gap D (16), and the secondary oil separation cavity (6) is connected with the secondary exhaust cavity (10) through a gap A (9).

7. An end cover for a motor-driven compressor as set forth in claim 1, wherein: the pressure relief cavity (12) is connected with the exhaust cavity (18) through a notch C (13), and the pressure relief cavity (12) is connected with the secondary exhaust cavity (10) through a notch B (11).