阅读说明：本技术 一种车用压缩机 (Compressor for vehicle ) 是由 宋雪峰 王玉强 王智君 李恺 冯天浩 于 2019-11-29 设计创作，主要内容包括：本发明提供一种车用压缩机,包括：壳体,具有容置空间；压缩机构,位于所述容置空间内,所述压缩机构包括：静涡盘,设有第一涡旋齿；以及动涡盘,所述静涡盘的第一涡旋齿与所述动涡盘的第二涡旋齿形成压缩腔；电机机构,位于所述容置空间内,包括电机转子和电机定子,所述电机机构驱动所述动涡盘相对于所述静涡盘转动,以压缩所述压缩腔内的制冷剂；油池,位于所述低压腔内；油泵,位于所述低压腔内以将油池中润滑油泵送至轴系传动机构的摩擦副进行润滑；回油机构,设置于所述压缩机构上,联通所述高压腔及所述低压腔,以将所述高压腔内的润滑油通过所述回油机构流入所述油池。本发明提供的压缩机改善润滑效果。(The invention provides a compressor for a vehicle, comprising: a housing having an accommodating space; the compressing mechanism is positioned in the accommodating space and comprises: the static vortex disc is provided with a first vortex tooth; the first scroll wrap of the fixed scroll and the second scroll wrap of the movable scroll form a compression cavity; the motor mechanism is positioned in the accommodating space and comprises a motor rotor and a motor stator, and the motor mechanism drives the movable scroll disc to rotate relative to the fixed scroll disc so as to compress the refrigerant in the compression cavity; the oil pool is positioned in the low-pressure cavity; the oil pump is positioned in the low-pressure cavity and used for pumping lubricating oil in the oil pool to a friction pair of the shafting transmission mechanism for lubrication; and the oil return mechanism is arranged on the compression mechanism and is communicated with the high-pressure cavity and the low-pressure cavity so as to enable the lubricating oil in the high-pressure cavity to flow into the oil pool through the oil return mechanism. The compressor provided by the invention has an improved lubricating effect.)

1. A vehicular compressor, characterized by comprising:

a housing having an accommodating space;

the compressing mechanism is positioned in the accommodating space and comprises:

the static vortex disc is provided with a first vortex tooth; and

the movable scroll disk is provided with a second scroll wrap, one side of the movable scroll disk is opposite to the first scroll wrap of the fixed scroll disk, and the first scroll wrap of the fixed scroll disk and the second scroll wrap of the movable scroll disk form a compression cavity, wherein one side of the fixed scroll disk, which is back to the movable scroll disk, forms a high-pressure cavity with the shell, and one side of the movable scroll disk, which is back to the fixed scroll disk, forms a low-pressure cavity with the shell;

the motor mechanism is positioned in the accommodating space and comprises a motor rotor and a motor stator, and the motor mechanism drives the movable scroll disc to rotate relative to the fixed scroll disc so as to compress the refrigerant in the compression cavity;

the oil pool is positioned in the low-pressure cavity;

the oil pump is positioned in the low-pressure cavity and used for pumping lubricating oil in the oil pool to a friction pair of the shafting transmission mechanism for lubrication; and

and the oil return mechanism is arranged on the compression mechanism and is communicated with the high-pressure cavity and the low-pressure cavity so as to enable the lubricating oil in the high-pressure cavity to flow into the oil pool through the oil return mechanism.

2. The vehicular compressor according to claim 1, wherein said oil return mechanism comprises:

the first oil return hole is arranged on one side, facing the high-pressure cavity, of the fixed scroll disc;

the first oil outlet hole is arranged on one side, back to the fixed scroll, of the movable scroll;

first oil circuit, UNICOM first oil return hole with first oil outlet includes:

the first sub oil path is arranged on the fixed scroll, one end of the first sub oil path is communicated with the first oil return hole, the other end of the first sub oil path is communicated with a first communicating cavity, and the first communicating cavity is positioned on the end surface, facing the movable scroll, of a first scroll tooth of the fixed scroll, which is connected with the shell; and

and the second sub oil path is arranged on the movable scroll, one end of the second sub oil path is communicated with the first communicating cavity, and the other end of the second sub oil path is communicated with the first oil outlet.

3. The vehicular compressor according to claim 2, wherein said oil return mechanism further comprises:

and the annular sealing ring is positioned in the first communicating cavity to isolate the first communicating cavity and the compression cavity.

4. A vehicular compressor according to claim 3, wherein said annular seal ring comprises:

the first annular sealing body is positioned in the first communication cavity and clings to the end surface of the movable scroll disk facing the fixed scroll disk in the first communication cavity and the inner side wall of the first communication cavity; and

the first annular elastic body is located in the first communication cavity and clings to the first annular sealing body and the inner wall of the first communication cavity.

5. A vehicular compressor according to claim 4, wherein said first annular seal body has a diameter d₁Satisfy d₁＞2×r+d₂Wherein r is the rotation eccentricity of the movable scroll disk, d₂Communicating the second sub-oil passage with the diameter of the end of the first communication cavity such that the end of the second sub-oil passage communicating with the first communication cavity is always enveloped within the inner diameter profile of the first annular seal body.

6. The compressor for vehicle as claimed in claim 2, wherein a side of the orbiting scroll facing away from the fixed scroll is provided with a bearing hole, the motor mechanism drives the orbiting scroll to eccentrically rotate by a crankshaft, an end of the crankshaft connected to the orbiting scroll is located in the bearing hole, and the first oil outlet hole is located in the bearing hole.

7. The vehicular compressor according to claim 1, wherein said oil return mechanism comprises:

the second oil return hole is formed in one side, facing the high-pressure cavity, of the fixed scroll disc;

the second oil outlet hole is formed in one side, back to the fixed scroll, of the movable scroll;

the second oil circuit, the UNICOM the second oil gallery with the second oil outlet includes:

the third sub oil path is arranged on the fixed scroll, and one end of the third sub oil path is communicated with the second oil return hole;

a fourth sub oil path, which is arranged in the housing, wherein one end of the fourth sub oil path is communicated with the third sub oil path, the other end of the fourth sub oil path is communicated with a second communicating cavity, the second communicating cavity is positioned on the end surface of the movable scroll disc, which is opposite to the fixed scroll disc, and the second communicating cavity is always covered by the housing; and

and the fifth sub oil path is arranged on the movable scroll, one end of the fifth sub oil path is communicated with the second communicating cavity, and the other end of the fifth sub oil path is communicated with the second oil outlet.

8. The vehicular compressor according to claim 7, wherein said oil return mechanism further comprises:

first gaskets located between the third sub oil passage and the fourth sub oil passage and between the fourth sub oil passage and the second communicating chamber, the first gaskets being provided with:

the first communicating hole is used for communicating the third sub oil path with the fourth sub oil path; and

and the second communication through hole is used for communicating the fourth sub oil path with the second communication cavity.

9. Compressor for vehicles according to claim 8, characterized in that the diameter d of said second communication chamber₃Satisfy d₃＞2×r+d₄Wherein r is the rotation eccentricity of the movable scroll disk, d₄The diameter of the second communication hole is such that the second communication hole is always enveloped within the inner diameter profile of the second communication chamber.

10. The compressor for vehicle as claimed in claim 7, wherein a side of the orbiting scroll facing away from the fixed scroll is provided with a bearing hole, the motor mechanism drives the orbiting scroll to eccentrically rotate by a crank shaft, an end of the crank shaft connected to the orbiting scroll is positioned in the bearing hole, and the second oil outlet hole is positioned in the bearing hole.

11. The vehicular compressor according to claim 1, wherein said oil return mechanism comprises:

the third oil return hole is formed in one side, facing the high-pressure cavity, of the fixed scroll;

the third oil outlet is arranged on the shell;

the third oil circuit, the UNICOM the third oil gallery with the third oil outlet includes:

the sixth sub oil path is arranged on the fixed scroll, and one end of the sixth sub oil path is communicated with the third oil return hole; and

and the seventh sub oil path is arranged in the shell, one end of the seventh sub oil path is communicated with the sixth sub oil path, and the other end of the seventh sub oil path is communicated with the third oil outlet hole.

12. The vehicular compressor according to claim 11, wherein said oil return mechanism further comprises:

and the second gasket is positioned between the sixth sub oil path and the seventh sub oil path, and is provided with a third through hole for communicating the sixth sub oil path with the seventh sub oil path.

13. The vehicular compressor according to claim 11, wherein said housing and said orbiting scroll are formed with a lubricating oil chamber, and said third oil outlet hole communicates with said lubricating oil chamber.

14. The vehicular compressor according to claim 11, wherein said third oil outlet hole communicates with said oil sump.

Technical Field

The invention relates to the field of compressors, in particular to a vehicle compressor.

Background

The vehicle scroll compressor has the characteristics of wide rotating speed range and complex and changeable operating conditions in application, and has very high requirements on the service life and the reliability of the compressor. And the lubrication condition of the bearing and the friction pair is very important to the service life of the compressor. The prior art compressor adopts some technical measures for providing lubrication (for example, lubricating oil is separated from an exhaust side and is returned to an air suction side through throttling pressure reduction, or oil-gas lubrication on the air suction side is utilized), and the lubricating requirement of a bearing can be met under the common working condition. However, when the engine is subjected to more severe operating conditions such as high rotating speed, heavy load, little oil in the compressor, and the like, the abrasion failure is likely to be caused by poor lubrication due to the larger load and partial oil shortage, and a more comprehensive and reliable lubricating mechanism is required.

Disclosure of Invention

The present invention has been made to overcome the above-mentioned drawbacks of the prior art, and an object of the present invention is to provide an electric compressor for a vehicle, which can provide a comprehensive and reliable lubrication mechanism of the compressor and improve the lubrication effect.

The invention provides a compressor for a vehicle, comprising:

a housing having an accommodating space;

the compressing mechanism is positioned in the accommodating space and comprises:

the static vortex disc is provided with a first vortex tooth; and

the movable scroll disk is provided with a second scroll wrap, one side of the movable scroll disk is opposite to the first scroll wrap of the fixed scroll disk, and the first scroll wrap of the fixed scroll disk and the second scroll wrap of the movable scroll disk form a compression cavity, wherein one side of the fixed scroll disk, which is back to the movable scroll disk, forms a high-pressure cavity with the shell, and one side of the movable scroll disk, which is back to the fixed scroll disk, forms a low-pressure cavity with the shell;

the motor mechanism is positioned in the accommodating space and comprises a motor rotor and a motor stator, and the motor mechanism drives the movable scroll disc to rotate relative to the fixed scroll disc so as to compress the refrigerant in the compression cavity;

the oil pool is positioned in the low-pressure cavity;

the oil pump is positioned in the low-pressure cavity and used for pumping lubricating oil in the oil pool to a friction pair of the shafting transmission mechanism for lubrication; and

and the oil return mechanism is arranged on the compression mechanism and is communicated with the high-pressure cavity and the low-pressure cavity so as to enable the lubricating oil in the high-pressure cavity to flow into the oil pool through the oil return mechanism.

In some embodiments of the invention, the oil return mechanism comprises:

the first oil return hole is arranged on one side, facing the high-pressure cavity, of the fixed scroll disc;

the first oil outlet hole is arranged on one side, back to the fixed scroll, of the movable scroll;

first oil circuit, UNICOM first oil return hole with first oil outlet includes:

the first sub oil path is arranged on the fixed scroll, one end of the first sub oil path is communicated with the first oil return hole, the other end of the first sub oil path is communicated with a first communicating cavity, and the first communicating cavity is positioned on the end surface, facing the movable scroll, of a first scroll tooth of the fixed scroll, which is connected with the shell;

and

and the second sub oil path is arranged on the movable scroll, one end of the second sub oil path is communicated with the first communicating cavity, and the other end of the second sub oil path is communicated with the first oil outlet.

In some embodiments of the invention, the oil return mechanism further comprises:

and the annular sealing ring is positioned in the first communicating cavity to isolate the first communicating cavity and the compression cavity.

In some embodiments of the invention, the annular seal ring comprises:

the first annular sealing body is positioned in the first communication cavity and clings to the end surface of the movable scroll disk facing the fixed scroll disk in the first communication cavity and the inner side wall of the first communication cavity; and

the first annular elastic body is located in the first communication cavity, and the first annular elastic body is tightly attached to the first annular sealing body and the inner wall of the first communication cavity.

In some embodiments of the invention, the diameter d of the first annular seal body₁Satisfy d₁＞2×r+d₂Wherein r is the rotation eccentricity of the movable scroll disk, d₂Communicating the second sub-oil passage with the diameter of the end of the first communication cavity such that the end of the second sub-oil passage communicating with the first communication cavity is always enveloped within the inner diameter profile of the first annular seal body.

In some embodiments of the invention, a bearing hole is arranged on a side of the movable scroll, which faces away from the fixed scroll, the motor mechanism drives the movable scroll to eccentrically rotate through a crankshaft, one end of the crankshaft, which is connected with the movable scroll, is located in the bearing hole, and the first oil outlet hole is located in the bearing hole.

In some embodiments of the invention, the oil return mechanism comprises:

the second oil return hole is formed in one side, facing the high-pressure cavity, of the fixed scroll disc;

the second oil outlet hole is formed in one side, back to the fixed scroll, of the movable scroll;

the second oil circuit, the UNICOM the second oil gallery with the second oil outlet includes:

the third sub oil path is arranged on the fixed scroll, and one end of the third sub oil path is communicated with the second oil return hole;

a fourth sub oil path, which is arranged in the housing, wherein one end of the fourth sub oil path is communicated with the third sub oil path, the other end of the fourth sub oil path is communicated with a second communicating cavity, the second communicating cavity is positioned on the end surface of the movable scroll disc, which is opposite to the fixed scroll disc, and the second communicating cavity is always covered by the housing; and

and the fifth sub oil path is arranged on the movable scroll, one end of the fifth sub oil path is communicated with the second communicating cavity, and the other end of the fifth sub oil path is communicated with the second oil outlet.

In some embodiments of the invention, the oil return mechanism further comprises:

first gaskets located between the third sub oil passage and the fourth sub oil passage and between the fourth sub oil passage and the second communicating chamber, the first gaskets being provided with:

the first communicating hole is used for communicating the third sub oil path with the fourth sub oil path; and

and the second communication through hole is used for communicating the fourth sub oil path with the second communication cavity.

In some embodiments of the invention, the diameter d of the second communication lumen₃Satisfy d₃＞2×r+d₄Wherein r is the rotation eccentricity of the movable scroll disk, d₄The diameter of the second communication hole is such that the second communication hole is always enveloped within the inner diameter profile of the second communication chamber.

In some embodiments of the invention, a bearing hole is arranged on a side of the movable scroll, which faces away from the fixed scroll, the motor mechanism drives the movable scroll to eccentrically rotate through a crankshaft, one end of the crankshaft, which is connected with the movable scroll, is located in the bearing hole, and the second oil outlet hole is located in the bearing hole.

In some embodiments of the invention, the oil return mechanism comprises:

the third oil return hole is formed in one side, facing the high-pressure cavity, of the fixed scroll;

the third oil outlet is arranged on the shell;

the third oil circuit, the UNICOM the third oil gallery with the third oil outlet includes:

the sixth sub oil path is arranged on the fixed scroll, and one end of the sixth sub oil path is communicated with the third oil return hole; and

and the seventh sub oil path is arranged in the shell, one end of the seventh sub oil path is communicated with the sixth sub oil path, and the other end of the seventh sub oil path is communicated with the third oil outlet hole.

In some embodiments of the invention, the oil return mechanism further comprises:

a second gasket located between the sixth sub oil path and the seventh sub oil path, the second gasket having a third through hole for communicating the sixth sub oil path and the seventh sub oil path

In some embodiments of the present invention, a lubricating oil chamber is formed between the housing and the orbiting scroll, and the third oil outlet hole communicates with the lubricating oil chamber.

In some embodiments of the invention, the third oil outlet hole is communicated with the oil pool.

Compared with the prior art, the invention has the following advantages:

the double-oil-way lubrication is realized through the oil return of the high-pressure cavity and the oil supply of the low-pressure cavity oil pump, so that a comprehensive and reliable lubricating mechanism of the compressor is provided, the utilization rate of lubricating oil is improved, and the lubricating effect is improved.

Drawings

The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

Fig. 1 shows a sectional view of a compressor according to a first embodiment of the present invention.

Fig. 2 shows a schematic view of an annular seal ring according to a first embodiment of the invention.

Fig. 3 shows a schematic view of the position of a first communication chamber according to a first embodiment of the invention.

Fig. 4 shows a sectional view of a compressor according to a second embodiment of the present invention.

Fig. 5 shows a sectional view of a compressor according to a third embodiment of the present invention.

Fig. 6 shows a schematic view of a first shim according to a third embodiment of the invention.

Fig. 7 shows a schematic view of the position of a first shim according to a third embodiment of the invention.

Fig. 8 shows a sectional view of a compressor according to a fourth embodiment of the present invention.

Fig. 9 shows a sectional view of a compressor according to a fifth embodiment of the present invention.

Fig. 10 shows a sectional view of a compressor according to a sixth embodiment of the present invention.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.

In order to improve the defects of the prior art, the invention provides a compressor for a vehicle.

Referring first to fig. 1 to 3, fig. 1 to 3 show a first embodiment of the present invention. Fig. 1 shows a sectional view of a compressor according to a first embodiment of the present invention. Fig. 2 shows a schematic view of an annular seal ring according to a first embodiment of the invention. Fig. 3 shows a schematic view of the position of a first communication chamber according to a first embodiment of the invention.

In the first embodiment, the vehicular compressor includes the casing 1, the compression mechanism, the motor mechanism, the oil sump 8, the oil pump 9, and the oil return mechanism. The housing 1 has an accommodating space. The compression mechanism is positioned in the accommodating space and comprises a fixed scroll disk 2 and a movable scroll disk 3. The fixed scroll 2 is provided with a first wrap 21. The orbiting scroll 3 is provided with a second wrap 31, and a side of the orbiting scroll 3 provided with the second wrap 31 is opposite to the first wrap 21 of the fixed scroll 2. The first wrap 21 of the fixed scroll 2 and the second wrap 31 of the movable scroll 3 form a compression chamber. The side of the fixed scroll 2 facing away from the movable scroll 3 forms a high pressure chamber 4 with the housing 1. The side of the orbiting scroll 3 facing away from the fixed scroll 2 forms a low pressure chamber (chamber where the oil pool 8 is located) with the housing 1. The motor mechanism is positioned in the accommodating space and comprises a motor rotor and a motor stator, and the motor mechanism drives the movable scroll disk 3 to rotate relative to the fixed scroll disk 2 so as to compress the refrigerant in the compression cavity. An oil sump 8 is located within the low pressure chamber. And the oil pump 9 is positioned in the low-pressure cavity to pump lubricating oil in the oil pool to a friction pair of the shafting transmission mechanism for lubrication. The oil return mechanism is arranged on the compression mechanism and communicated with the high-pressure cavity 4 and the low-pressure cavity so as to enable lubricating oil in the high-pressure cavity 4 to flow into the oil pool 8 through the oil return mechanism.

Therefore, double-oil-way lubrication is realized through oil return of the high-pressure cavity and oil supply of the oil pump, so that a comprehensive and reliable lubricating mechanism of the compressor is provided, and the utilization rate of lubricating oil is improved.

In the first embodiment of the present invention, the oil return mechanism includes a first oil return hole 501, a first oil outlet hole 502, and a first oil passage. A first oil return hole 501 is provided at a side of the fixed scroll 2 facing the high pressure chamber 4. A first oil outlet hole 502 is provided at a side of the orbiting scroll 3 facing away from the fixed scroll 2. The first oil passage communicates the first oil return hole 501 and the first oil outlet hole 502. The first oil passage includes a first sub-oil passage 51, a second sub-oil passage 54, and a first communication chamber 52.

A first sub oil passage 51 is provided to the fixed scroll 2. One end of the first sub oil passage 51 communicates with the first oil return hole 501. The other end of the first sub oil passage 51 is communicated with the first communicating cavity 52. The first communicating chamber 52 is located at an end surface of the first wrap 21 of the fixed scroll 2 facing the orbiting scroll 2. A second sub oil passage 54 is provided in the orbiting scroll 3, one end of the second sub oil passage 54 communicates with the first communicating chamber 52, and the other end of the second sub oil passage 54 communicates with the first oil outlet 502. First communicating chamber 52 is formed by surrounding end surfaces of fixed scroll 2 and orbiting scroll 3, and the oil return mechanism further includes an annular seal ring 53 in consideration of eccentric rotation of orbiting scroll 3 with respect to fixed scroll 2. The annular seal ring 53 is located in the first communicating chamber 52 to isolate the first communicating chamber 52 from the compression chamber. In some embodiments of the present invention, the annular sealing ring 53 includes a first annular sealing body 531 and a first annular elastic body 532. The first annular sealing body 531 is located in the first communicating cavity 52, and the first annular sealing body 531 is tightly attached to the end surface 301, facing the fixed scroll 2, of the movable scroll 3 in the first communicating cavity 52 and the inner side wall of the first communicating cavity 52. The first annular elastic body 532 is located in the first communicating cavity 52 and is coaxially arranged with the first annular sealing body 531, and the first annular elastic body 532 is tightly attached to the inner side walls of the first annular sealing body 531 and the first communicating cavity 52.

In the first embodiment of the present invention, the diameter d of the first annular sealing body 531₁Satisfy d₁＞2×r+d₂Where r is a turning eccentricity of the orbiting scroll 3, d₂The diameter of the end of the second sub oil path 54 communicating with the first communicating cavity 52 is such that the end 541 of the second sub oil path 54 communicating with the first communicating cavity 52 is always enveloped within the inner diameter profile of the first annular sealing body 531. Thereby, sealing of the oil passage between the relatively moving parts is achieved.

In the first embodiment of the present invention, the first communicating chamber 52 is located at an end of the fixed scroll 2 facing the oil sump 8. One side of the movable scroll disk 3, which is opposite to the fixed scroll disk 2, is provided with a bearing hole 32, the motor mechanism drives the movable scroll disk 3 to eccentrically rotate through a crankshaft 7, one end of the crankshaft 7, which is connected with the movable scroll disk 3, is positioned in the bearing hole 32, and the first oil outlet hole 502 is positioned in the bearing hole 32. As shown in fig. 1, in the first embodiment of the present invention, the first oil outlet hole 502 is located on the side of the bearing hole 32 facing the direction of gravity.

Therefore, in the operation process of the compressor, low-pressure refrigerant steam mixed with a part of lubricating oil is compressed by a compression cavity formed by matching the driven scroll 3 and the fixed scroll 2, and a mixture of the compressed high-pressure refrigerant steam and the lubricating oil flows into the high-pressure cavity 4 through the exhaust hole of the fixed scroll 2. A first oil return hole 301 is formed in one side of the fixed scroll 2 facing the high pressure chamber 4, a first sub oil path 51 is formed in the compression mechanism (one end of the first sub oil path 51 is communicated with the first oil return hole 301), and the other end of the first sub oil path 51 is communicated with a first communication chamber 52 formed in an end surface 201 of the fixed scroll 2. The movable scroll 3 is provided with an end surface 301 facing the fixed scroll 2, a second sub oil path 54 and a bearing hole 32, one end of the second sub oil path 54 is communicated with the first communication cavity 52 through the end surface 301 of the movable scroll 3, the other end of the second sub oil path 54 is communicated with a first oil outlet hole 502 provided in the bearing hole 32, and the bearing 61 is installed in the bearing hole 32.

The annular sealing ring 53 is installed in the first communicating cavity 52, the annular sealing ring 53 comprises a first annular sealing body 531 and a first annular elastic body 532, the first annular elastic body 532 is in contact with the bottom surface of the first communicating cavity 52 and supports the first annular sealing body 531, and after assembly, a pretightening force is provided through compression deformation of the first annular elastic body 532, so that the first annular sealing body 531 is always in contact with the end surface 301 of the movable scroll 3. During the rotation of the movable scroll 1, a small clearance fit is formed between the end surface 301 of the movable scroll 3 and the end surface 201 of the fixed scroll 2 (the clearance value delta is not more than 0.1mm), and the second sub oil path 54 is arranged at one end of the end surface 301 and is always enveloped in the inner diameter profile of the first annular sealing body 531.

Therefore, the lubricating oil separated from the high-pressure chamber 4 can be made to flow along the single path of the first oil return hole 501, the first sub oil passage 51, the first communicating chamber 52, the second sub oil passage 54, the first oil outlet hole 502, and the bearing hole 32, and the lubricating effect on the bearing 61 attached to the bearing hole 32 can be greatly improved.

In addition, the oil pump 9 located in the low pressure chamber of the compressor sucks the lubricating oil in the oil sump 8 through the oil suction hole 81 and sends the lubricating oil into the bearing hole 32 through the oil pump shaft 91 and the crankshaft oil supply hole 71, thereby further improving the lubrication of the bearing 61.

In the first embodiment of the present invention, the housing 1 is provided with the bearing housing hole 12 and the oil return hole 111, the bearing 62 is installed in the bearing housing hole 12, the bottom of the housing 1 is provided with the lubricating oil pool 8, the housing 1 and the movable scroll 3 cooperate to form the lubricating oil chamber 11, the lubricating oil chamber 11 is communicated with both the bearing housing hole 12 and the bearing hole 32, and the lubricating oil chamber 11 is communicated with the lubricating oil pool 8 through the oil return hole 111.

Therefore, the lubricating oil inside the bearing hole 32 flows into the lubricating-oil chamber 11, and the lubricating effect on the bearing 62 can be improved, and the lubricating oil flows into the lubricating-oil reservoir 8 through the oil return hole 111 after accumulating inside the lubricating-oil chamber 11.

A part of the lubricating oil in the lubricating oil pool 8 is sucked by the oil pump 9 through the oil suction hole 81, and the other part of the lubricating oil is mixed in the low-pressure refrigerant vapor and compressed again and flows into the high-pressure chamber 4.

The high-pressure cavity oil return lubrication mechanism and the low-pressure cavity active oil supply lubrication mechanism jointly form lubricating oil circulation in the compressor.

Further, by adjusting the position of the communication hole between the second sub oil passage 54 and the bearing hole 32 (i.e., the position where the first oil outlet hole 502 is provided), the return oil can be supplied to different positions. In the second embodiment of the present invention, the position of the first oil outlet hole 502 may be, for example, a position higher than the main axis where the oil is directly supplied (see fig. 4). In other words, the first oil outlet hole 502 may be located at a side of the bearing hole 32 facing away from the gravity direction, so as to lubricate the friction pair of the compressor main shaft line part.

This improves the lubricating effect on the bearings 61 and 62, reduces the oil discharge amount of the compressor, and reduces the oil circulation rate of the air conditioning system.

Referring first to fig. 5 to 7, fig. 5 to 7 show a third embodiment of the present invention. Fig. 5 shows a sectional view of a compressor according to a third embodiment of the present invention. Fig. 6 shows a schematic view of a first shim according to a third embodiment of the invention. Fig. 7 shows a schematic view of the position of a first shim according to a third embodiment of the invention.

In the third embodiment, the vehicular compressor includes the casing 1, the compression mechanism, the motor mechanism, the oil sump 8, the oil pump 9, and the oil return mechanism. The housing 1 has an accommodating space. In the present embodiment, the housing 1, the compression mechanism, the motor mechanism, the oil sump 8, and the oil pump 9 are the same as those of the first embodiment.

Unlike the first embodiment, in the third embodiment, the oil return mechanism includes a second oil return hole 501, a second oil outlet hole 502, and a second oil passage. A second oil return hole 501 is provided at a side of the fixed scroll 2 facing the high pressure chamber 4. A second oil outlet hole 502 is provided at a side of the orbiting scroll 3 facing away from the fixed scroll 2. The second oil path is communicated with the second oil return hole 501 and the second oil outlet hole 502.

The second oil passage includes a third sub oil passage 51a, a fourth sub oil passage 53a, and a fifth sub oil passage 55 a. A third sub oil path 51a is arranged on the fixed scroll 2, and one end of the third sub oil path 51a is communicated with the second oil return hole 501. A fourth sub oil path 53a is provided in the casing 1, one end of the fourth sub oil path 53a communicates with the third sub oil path 51a, the other end of the fourth sub oil path 53a communicates with a second communication chamber 54a, the second communication chamber 54a is located on an end surface of the movable scroll 3 facing away from the fixed scroll 2, and the second communication chamber 54a is always covered by the casing 1. A fifth sub oil path 55a is provided in the orbiting scroll 3, one end of the fifth sub oil path 55a communicates with the second communication chamber 54a, and the other end of the fifth sub oil path 55a communicates with the second oil outlet hole 502.

The oil return mechanism may further include a first gasket 52 a. The first gasket 52a is located between the third sub oil passage 51a and the fourth sub oil passage 53a and between the fourth sub oil passage 55a and the second communication chamber 54 a. The first spacer 52a is provided with a first coupling through hole 521a and a second coupling through hole 522 a. The first communicating hole 521a communicates the third sub oil passage 51a with the fourth sub oil passage 53 a. The second communication hole 522a communicates the fourth sub oil passage 53a with the second communication chamber 54 a.

In a third embodiment of the invention, the diameter d of the second communication chamber 54a₃Satisfy d₃＞2×r+d₄Where r is a turning eccentricity of the orbiting scroll 3, d₄The diameter of the second coupling bore 522a is such that the second coupling bore 522a is always enveloped within the inner diameter profile of the second coupling chamber 54 a. Thereby, sealing of the oil passage between the relatively moving parts is achieved.

In the third embodiment of the present invention, the second oil outlet hole 502 is located on the side of the bearing hole 32 facing the direction of gravity.

Therefore, in the running process of the compressor, the lubricating oil circulation in the compressor is formed by the high-pressure cavity oil return lubrication mechanism and the low-pressure cavity active oil supply lubrication mechanism.

Further, by adjusting the position of the communication hole between the fifth sub oil passage 55a and the bearing hole 32 (i.e., the position where the first oil outlet hole 502 is provided), the return oil can be supplied to different positions, and it is possible to directly supply the oil at a position higher than the main axis. In the fourth embodiment of the present invention, the position of the second oil outlet hole 502 may be, for example, a position higher than the main axis in which direct oil supply is possible (see fig. 8). In other words, the second oil outlet hole 502 may be located at a side of the bearing hole 32 facing away from the gravity direction, so as to lubricate the friction pair of the compressor main shaft line part.

This improves the lubricating effect on the bearings 61 and 62, reduces the oil discharge amount of the compressor, and reduces the oil circulation rate of the air conditioning system.

Referring next to fig. 9, fig. 9 shows a cross-sectional view of a compressor in accordance with a fifth embodiment of the present invention.

In the fifth embodiment, the vehicular compressor includes the casing 1, the compression mechanism, the motor mechanism, the oil sump 8, the oil pump 9, and the oil return mechanism. The housing 1, the compression mechanism, the motor mechanism, the oil sump 8, and the oil pump 9 are the same as those of the first embodiment.

Unlike the first embodiment, in the fifth embodiment of the present invention, the oil return mechanism includes a third oil return hole 501, a third oil outlet hole 502, and a third oil passage. A third oil return hole 501 is provided at a side of the fixed scroll 2 facing the high pressure chamber 4. The third oil outlet hole 502 is provided in the casing 1. The third oil path is communicated with the third oil return hole 501 and the third oil outlet hole 502.

The third oil passage includes a sixth sub oil passage 51c and a seventh sub oil passage 54 c. A sixth sub oil path 51c is arranged on the fixed scroll 2, and one end of the sixth sub oil path 51c is communicated with the third oil return hole 501. The seventh sub oil passage 54c is disposed in the casing 1, one end of the seventh sub oil passage 54c is communicated with the sixth sub oil passage 51c, and the other end of the seventh sub oil passage 54c is communicated with the third oil outlet 502.

In the fifth embodiment of the present invention, the oil return mechanism further includes a second gasket 53 c. The second gasket 53c is located between the sixth sub oil passage 51c and the seventh sub oil passage 54c, the second gasket 53c is provided with a third through hole 52c, and the sixth sub oil passage 51c and the seventh sub oil passage 54c are communicated through the third through hole 52 c.

Therefore, in the operation process of the compressor, low-pressure refrigerant steam mixed with a part of lubricating oil is compressed by a compression cavity formed by matching the driven scroll 3 and the fixed scroll 2, and the compressed mixture of high-pressure refrigerant steam and lubricating oil flows into the high-pressure cavity 4 through the exhaust hole of the fixed scroll.

The lubricating oil separated from the high pressure chamber 4 flows along the paths of the third oil return hole 501, the sixth sub oil passage 51c, the third through hole 52c, the seventh sub oil passage 54c, the lubricating oil chamber 11, the oil return hole 111, and the oil sump 8.

The oil pump 9 located in the low pressure chamber of the compressor sucks the lubricating oil in the oil sump 8 through the oil suction hole 81 and feeds the lubricating oil into the bearing hole 32 through the oil pump shaft 91 and the crankshaft oil supply hole 71, thereby further improving the lubrication of the bearing 61 and the friction pair.

The lubricating oil in the bearing hole 32 can flow into the lubricating oil chamber 11, so that the lubricating effect on the bearing 62 and the friction pair can be improved, and the lubricating oil flows into the lubricating oil pool 8 through the oil return hole 111 after accumulating in the lubricating oil chamber 11.

Therefore, the lubricating oil circulation in the compressor is formed through the lubricating oil pool, the low-pressure cavity oil pump oil supply mechanism and the high-pressure cavity oil return mechanism.

In addition, the position of the third oil outlet hole 502 communicated with the seventh sub oil path 54c is adjusted, so that the return oil can be supplied to the lubricating oil chamber 8, as shown in the sixth embodiment shown in fig. 10, which is not described herein.

Compared with the prior art, the invention has the following advantages:

double-oil-way lubrication is realized through high-pressure cavity oil return and low-pressure cavity oil pump oil supply, so that a comprehensive and reliable lubricating mechanism of the compressor is provided, and the utilization rate of lubricating oil is improved.

Exemplary embodiments of the present invention are specifically illustrated and described above. It is to be understood that the invention is not to be limited to the disclosed embodiments, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the scope of the appended claims.