CN216665920U - A many times oil return structure for electric compressor - Google Patents
A many times oil return structure for electric compressor Download PDFInfo
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- CN216665920U CN216665920U CN202122761018.1U CN202122761018U CN216665920U CN 216665920 U CN216665920 U CN 216665920U CN 202122761018 U CN202122761018 U CN 202122761018U CN 216665920 U CN216665920 U CN 216665920U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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Abstract
The utility model provides a multiple oil return structure for an electric compressor, and relates to the technical field of oil return structures. The method comprises the following steps: the refrigerating device comprises a rear cover and a static disc, wherein the rear cover and the static disc are spliced with each other, a first inner cavity and a second inner cavity are arranged on the rear cover, a gas-liquid mixture of a refrigerant and cooling oil flows into the first inner cavity through the static disc, an exhaust port is arranged at the upper end part of the second inner cavity, an inflow hole is formed between the first inner cavity and the second inner cavity, a first oil return hole and a second oil return hole are formed between the second inner cavity and the surface of the working disc, an oil return channel is arranged on the static disc, and the second oil return hole is communicated with the first oil return hole through the oil return channel. The utility model avoids the problem that the performance of the electric compressor is influenced by large flow velocity when the compressor exhausts air due to primary oil return, and the multiple inner cavities arranged at the same time slow down the flow velocity of the primary exhaust, so that the oil return effect of the compressor is more sufficient, the generated noise is reduced, and the performance of the electric compressor is finally improved.
Description
Technical Field
The utility model relates to the technical field of oil return structures, in particular to a multiple oil return structure for an electric compressor.
Background
With the continuous development of various industries in society, the energy utilization rate is reduced day by day, and the environmental pollution is more and more serious, so that the new energy automobile is greatly supported by the nation due to the characteristics of environmental protection and energy conservation. The electric compressor is used as a core component of a new energy automobile air conditioning system, plays an important role in the field, and the role played by the electric compressor is not replaceable. The vibration noise, reliability, sealing performance and other properties of the electric compressor are important factors affecting the operation of the electric compressor.
At present, most of electric compressors on the market adopt an exhaust structure with once oil return, and the flow rate is high during the exhaust of the compressor, so that the NVH (noise, vibration and comfort) and the exhaust pressure pulsation are poor, and the performance of the electric compressor is influenced.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a multiple oil return structure for a motor-driven compressor for solving various problems in the background art.
To achieve the above and other related objects, the present invention provides a multiple oil return structure for a motor-driven compressor, including:
a back cover and a static disc, wherein the back cover and the static disc are spliced with each other,
the rear cover is provided with a first inner cavity and a second inner cavity, one side of the rear cover, which is close to the static disc, is a working disc surface, the first inner cavity is arranged on the working disc surface, a gas-liquid mixture of a refrigerant and cooling oil flows into the first inner cavity through the static disc, the length direction of the second inner cavity is parallel to the working disc surface, the upper end part of the second inner cavity is provided with an exhaust port, an inflow hole is arranged between the first inner cavity and the second inner cavity, a first oil return hole and a second oil return hole are arranged between the second inner cavity and the working disc surface, the first oil return hole is close to the lower end part of the second inner cavity, and the second oil return hole is close to the upper end part of the second inner cavity;
and an oil return passage is arranged on the static disc, and the second oil return hole is communicated with the first oil return hole through the oil return passage.
Optionally, a flow guide hole is formed in the static disc, and the flow guide hole is communicated with the first inner cavity.
Optionally, the oil return channel is an oil return groove, one end of the oil return groove is communicated with the first oil return hole, and the other end of the oil return groove is communicated with the second oil return hole.
Optionally, a third inner cavity is further formed in the rear cover, a third oil return hole is formed between the third inner cavity and the first inner cavity, the third inner cavity corresponds to and is communicated with the oil return groove, and part of cooling oil entering the gas-liquid mixture in the first inner cavity flows into the third inner cavity through the third oil return hole and then flows into the first oil return hole through the oil return groove.
Optionally, at least two third oil return holes are arranged between the third inner cavity and the first inner cavity.
Optionally, the third inner cavity is circumferentially disposed on the first inner cavity.
Optionally, a throttle valve is further arranged on the static disc, and the throttle valve is matched with the first oil return hole.
Optionally, one side of the first inner cavity, which is far away from the surface of the working disk, is a bottom surface, and the cavity wall of the second inner cavity is arranged on the bottom surface in a protruding manner.
Optionally, the cavity wall of the second inner cavity is disposed below the bottom surface.
Optionally, the rear cover and the stationary disc are both provided with mounting holes.
As described above, the multiple oil return structure for the electric compressor according to the present invention has at least the following advantages:
compared with a primary oil return exhaust structure adopted by an electric compressor with a traditional structure, the multi-oil return structure for the electric compressor has the advantages that the structure of multiple groups of oil return holes is designed, the multi-oil return process is realized, the problem that the performance of the electric compressor is influenced due to large flow speed when the compressor exhausts air caused by primary oil return is solved, the flow speed of primary exhaust is reduced by multiple inner cavities, a compression medium is subjected to flow division and circulation inside a rear cover, the oil return effect of the compressor is more sufficient, the exhaust pressure pulsation is reduced, the generated noise is reduced, and the performance of the electric compressor is finally improved.
Drawings
Fig. 1 is a schematic view showing an overall structure of a multiple oil return structure for a motor-driven compressor according to the present invention;
FIG. 2 is a schematic view of the structure of the rear cover according to the present invention;
FIG. 3 is a front view of the rear cover of the present invention;
FIG. 4 is a schematic cross-sectional view taken at A in FIG. 3;
FIG. 5 is a schematic cross-sectional view taken at B in FIG. 3;
fig. 6 is a schematic structural view of the stationary disk according to the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure of the present invention.
Please refer to fig. 1 to 6. It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the present disclosure, and are not used for limiting the conditions of the present disclosure, so that the present disclosure is not limited to the technical essence, and any modifications of the structures, changes of the ratios, or adjustments of the sizes, can still fall within the scope of the present disclosure without affecting the function and the achievable purpose of the present disclosure. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
The following examples are for illustrative purposes only. The various embodiments may be combined, and are not limited to what is presented in the following single embodiment.
Referring to fig. 1 to 6, the present invention provides a multiple oil return structure for an electric compressor, including a back cover 1 and a stationary disc 2, where the back cover 1 and the stationary disc 2 are spliced with each other, the back cover 1 is provided with a first inner cavity 11 and a second inner cavity 12, one side of the back cover 1 close to the stationary disc 2 is a working disc surface 13, the first inner cavity 11 is arranged on the working disc surface 13, a gas-liquid mixture of a refrigerant and cooling oil flows into the first inner cavity 11 through the stationary disc 2, a length direction of the second inner cavity 12 is parallel to the working disc surface 13, an upper end of the second inner cavity 12 is provided with an exhaust port 121, an inflow hole 101 is arranged between the first inner cavity 11 and the second inner cavity 12, a first oil return hole 102 and a second oil return hole 103 are arranged between the second inner cavity 12 and the working disc surface 13, the first oil return hole 102 is close to a lower end of the second inner cavity 12, the second oil return hole 103 is close to the upper end part of the second inner cavity 12; an oil return passage 21 is arranged on the static disc 2, and the second oil return hole 103 is communicated with the first oil return hole 102 through the oil return passage 21. Gas-liquid mixed media (refrigerant and cooling oil) are compressed and discharged into the rear cover 1 through the movable scroll and the fixed scroll of the electric compressor, the refrigerant and the cooling oil realize gas-liquid separation in each cavity of the rear cover 1, wherein the refrigerant gas is discharged through an exhaust port 121 of the rear cover 1 of the compressor, the circulation of an air conditioning system is realized, and the cooling oil flows back to the interior of the compressor through a throttle valve at the bottom to perform primary oil return, so that the cooling and the lubrication of parts are realized. When the compressor is installed, the length direction of the second inner cavity 12 needs to be kept to be arranged along the vertical up-down direction, after the gas-liquid mixture enters the second inner cavity 12, part of cooling oil is separated from the gas-liquid mixture under the action of gravity and flows back to the interior of the compressor through the first oil return hole 102, the rest cooling oil is separated again from the rest gas-liquid mixture in the ascending process, flows into the first oil return hole 102 through the second oil return hole 103 via the oil return channel 21 and then flows back to the interior of the compressor, and the separated high-pressure refrigerant gas is discharged from the gas outlet 121 and enters a circulating system. Compared with a primary oil return exhaust structure adopted by an electric compressor with a traditional structure, the structure of multiple groups of oil return holes is designed, the process of multiple times of oil return is realized, the problem that the performance of the electric compressor is influenced by a large flow speed when the compressor exhausts due to primary oil return is avoided, the flow speed of the primary exhaust is reduced by the multiple inner cavities arranged at the same time, and a compression medium is subjected to flow division circulation inside the rear cover 1, so that the oil return effect of the compressor is more sufficient, the pulsation of the exhaust pressure is reduced, the generated noise is reduced, and the performance of the electric compressor is finally improved.
In this embodiment, referring to fig. 6, a flow guide hole 22 is formed in the static disc 2, and the flow guide hole 22 is communicated with the first inner cavity 11. The gas-liquid mixed medium (refrigerant and cooling oil) is compressed and discharged into the rear cover 1 through the movable scroll and the stationary scroll 2 of the electric compressor, and the gas-liquid mixture can enter the inside of the first inner cavity 11 through the guide holes 22 when passing through the stationary scroll 2.
In this embodiment, referring to fig. 6, the oil return passage 21 is an oil return groove, one end of the oil return groove is communicated with the first oil return hole 102, and the other end of the oil return groove is communicated with the second oil return hole 103. When the rear cover 1 and the stationary disc 2 are in fit, the cooling oil flowing out of the second oil return hole 103 may flow into the first oil return hole 102 along the oil return groove, so that the high-pressure cooling oil can circulate in the cavity.
In this embodiment, referring to fig. 2, fig. 3 and fig. 5, a third inner cavity 13 is further disposed on the rear cover 1, a third oil return hole 104 is disposed between the third inner cavity 13 and the first inner cavity 11, the third inner cavity 13 corresponds to and is communicated with the oil return groove, and a part of the cooling oil entering the gas-liquid mixture in the first inner cavity 11 flows into the third inner cavity 13 through the third oil return hole 104 and then flows into the first oil return hole through the oil return groove. Through the third inner cavity 13 and the third oil return hole 104, the gas-liquid mixture can initially separate the cooling oil in advance when entering the first inner cavity 11, and the third inner cavity 13 and the oil return groove are correspondingly and communicated in position, so that the initially separated cooling oil enters the third inner cavity 13 through the third oil return hole 104 and then flows into the first oil return hole 102 through the oil return groove. Further optionally, at least two third oil return holes 104 are arranged between the third inner cavity 13 and the first inner cavity 11, so that the total oil return times of the structure can be increased, the oil return effect is more sufficient, the exhaust pressure pulsation is reduced, the generated noise is reduced, and finally the performance of the electric compressor is improved.
In this embodiment, referring to fig. 2 and fig. 3, the third inner cavity 13 is disposed around the first inner cavity 11. First inner chamber 11 sets up the central point of back lid 1 puts, and third inner chamber 13 encircles the setting and is in first inner chamber 11 edge sets up like this and can make full use of the position of back lid 1 sets up a plurality of cavitys, has further slowed down disposable carminative velocity of flow.
In this embodiment, the stationary disc 2 is further provided with a throttle valve, and the throttle valve is matched with the first oil return hole 102. Through the cooperation of the throttle valve arranged on the static disc 2 and the first oil return hole 102, the cooling oil returned from each path flows back to the inside of the electric compressor through the throttle valve to realize oil return.
In this embodiment, referring to fig. 2, a bottom surface 111 is disposed on a side of the first inner cavity 11 away from the working plate surface 13, and a cavity wall of the second inner cavity 12 is disposed above the bottom surface 111 in a protruding manner. The cavity wall of the second inner cavity 12 protrudes above the bottom surface 111, so that the positions of the second inner cavity 12 and the first inner cavity 11 are compressed as much as possible, and the thickness of the whole rear cover 1 can be further reduced.
In this embodiment, optionally, the cavity wall of the second inner cavity 12 may be disposed below the bottom surface 111.
In this embodiment, referring to fig. 2 and fig. 6, the rear cover 1 and the stationary disc 2 are both provided with mounting holes 1-2. The mounting holes 1-2 can be provided in plurality and respectively distributed on the disk surface edges of the rear cover 1 and the stationary disk 2, the mounting holes 1-2 can be pin holes or threaded holes or other types of holes, and after being aligned, the mounting holes can be connected through pin shafts or threaded pieces or other modes.
In summary, compared with a primary oil return exhaust structure adopted by an electric compressor with a traditional structure, the multi-oil return structure for the electric compressor is designed, the multi-oil return structure for the electric compressor realizes a multi-oil return process, avoids the problem that the performance of the electric compressor is affected by a large flow speed when the compressor exhausts air due to primary oil return, and meanwhile, the multiple inner cavities arranged slow down the flow speed of the primary exhaust, and a compressed medium performs flow division circulation inside the rear cover 1, so that the oil return effect of the compressor is more sufficient, the pulsation of the exhaust pressure is reduced, the generated noise is reduced, and the performance of the electric compressor is finally improved. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the utility model. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A multiple oil return structure for an electric compressor, comprising:
a back cover and a static disc, wherein the back cover and the static disc are spliced with each other,
the rear cover is provided with a first inner cavity and a second inner cavity, one side of the rear cover, which is close to the static disc, is a working disc surface, the first inner cavity is arranged on the working disc surface, a gas-liquid mixture of a refrigerant and cooling oil flows into the first inner cavity through the static disc, the length direction of the second inner cavity is parallel to the working disc surface, the upper end part of the second inner cavity is provided with an exhaust port, an inflow hole is arranged between the first inner cavity and the second inner cavity, a first oil return hole and a second oil return hole are arranged between the second inner cavity and the working disc surface, the first oil return hole is close to the lower end part of the second inner cavity, and the second oil return hole is close to the upper end part of the second inner cavity;
and the static disc is provided with an oil return channel, and the second oil return hole is communicated with the first oil return hole through the oil return channel.
2. The multiple oil return structure for a motor-driven compressor according to claim 1, wherein:
the static disc is provided with a flow guide hole, and the flow guide hole is communicated with the first inner cavity.
3. The multiple oil return structure for a motor-driven compressor according to claim 1, wherein:
the oil return channel is an oil return groove, one end of the oil return groove is communicated with the first oil return hole, and the other end of the oil return groove is communicated with the second oil return hole.
4. The multiple oil return structure for a motor-driven compressor according to claim 3, wherein:
the rear cover is further provided with a third inner cavity, a third oil return hole is formed between the third inner cavity and the first inner cavity, the third inner cavity corresponds to and is communicated with the oil return groove, and part of cooling oil entering the gas-liquid mixture in the first inner cavity flows into the third inner cavity through the third oil return hole and then flows into the first oil return hole through the oil return groove.
5. The multiple oil return structure for a motor-driven compressor according to claim 4, wherein:
at least two third oil return holes are formed between the third inner cavity and the first inner cavity.
6. The multiple oil return structure for a motor-driven compressor according to claim 4, wherein:
the third inner cavity is arranged on the first inner cavity in a surrounding mode.
7. The multiple oil return structure for a motor-driven compressor according to claim 1, wherein:
and the static disc is also provided with a throttle valve which is matched with the first oil return hole.
8. The multiple oil return structure for a motor-driven compressor according to claim 1, wherein:
one side of the first inner cavity far away from the surface of the working disk is a bottom surface, and the cavity wall of the second inner cavity is arranged on the bottom surface in a protruding mode.
9. The multiple oil return structure for a motor-driven compressor according to claim 8, wherein:
the cavity wall of the second inner cavity is arranged below the bottom surface.
10. The multiple oil return structure for the motor-driven compressor according to any one of claims 1 to 9, wherein:
and the rear cover and the static disc are provided with mounting holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122761018.1U CN216665920U (en) | 2021-11-11 | 2021-11-11 | A many times oil return structure for electric compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122761018.1U CN216665920U (en) | 2021-11-11 | 2021-11-11 | A many times oil return structure for electric compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216665920U true CN216665920U (en) | 2022-06-03 |
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ID=81790035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122761018.1U Active CN216665920U (en) | 2021-11-11 | 2021-11-11 | A many times oil return structure for electric compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216665920U (en) |
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2021
- 2021-11-11 CN CN202122761018.1U patent/CN216665920U/en active Active
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