CN219911145U

CN219911145U - Compressor and refrigeration equipment

Info

Publication number: CN219911145U
Application number: CN202321135102.5U
Authority: CN
Inventors: 杨豪
Original assignee: Guangdong Meizhi Compressor Co Ltd
Current assignee: Guangdong Meizhi Compressor Co Ltd
Priority date: 2023-05-11
Filing date: 2023-05-11
Publication date: 2023-10-27
Anticipated expiration: 2033-05-11

Abstract

The utility model discloses a compressor and refrigeration equipment, wherein the compressor comprises a shell, a cylinder and a lower bearing; the cylinder is provided with a first air return channel, the lower bearing is connected with the shell, a liquid storage cavity is formed by enclosing the lower bearing and the lower part of the shell, the cylinder is connected above the lower bearing, the lower bearing is provided with a second air return channel, the cylinder is communicated with the liquid storage cavity through the first air return channel and the second air return channel in sequence, the length of the first air return channel is L, the width of the first air return channel is W, the height of the first air return channel is H, the cross section area of the second air return channel is S, WL/S is more than or equal to 0.8 and less than or equal to 1.5,0.6 and is less than or equal to 1.6; the technical scheme of the utility model improves the performance and service life of the compressor.

Description

Compressor and refrigeration equipment

Technical Field

The utility model relates to the technical field of compressors, in particular to a compressor and refrigeration equipment.

Background

In the integrated compressor, a first air return channel and a second air return channel are respectively arranged on an air cylinder and a lower bearing, so that the air cylinder is communicated with a liquid storage cavity through the first air return channel and the second air return channel, and when the size ratio of the first air return channel to the second air return channel is smaller, a refrigerant entering from the second air return channel of the lower bearing cannot completely enter the air cylinder, thereby increasing flow resistance, increasing cold energy and further affecting the performance of the compressor; when the size ratio of the first air return channel to the second air return channel is larger, on one hand, the clearance volume of the compression cavity can be increased, the performance of the compressor is reduced, on the other hand, the rigidity of the cylinder is insufficient, and the cylinder is easy to deform after welding and installation, so that the performance and the service life of the compressor are greatly reduced.

The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present utility model and is not intended to represent an admission that the foregoing is prior art.

Disclosure of Invention

The main object of the present utility model is to provide a compressor, aimed at improving the performance and the service life of the compressor.

In order to achieve the above object, the present utility model provides a compressor comprising:

a housing;

the cylinder is provided with a first air return channel; and

the lower bearing is connected to the shell, a liquid storage cavity is formed by enclosing the lower bearing and the lower part of the shell, the air cylinder is connected to the upper part of the lower bearing, a second air return channel is arranged on the lower bearing, and the air cylinder is communicated with the liquid storage cavity through the first air return channel and the second air return channel in sequence;

the length of the first air return channel is L, the width of the first air return channel is W, the height of the first air return channel is H, the sectional area of the second air return channel is S, WL/S is more than or equal to 0.8 and less than or equal to 1.5,0.6, and H/L is more than or equal to 1.6.

Optionally, the device further comprises an oil cover, wherein the oil cover is connected to one side of the lower bearing, which is away from the cylinder, and is positioned in the liquid storage cavity.

Optionally, the oil cover is provided with an avoidance hole, and the second air return channel is communicated with the liquid storage cavity through the avoidance hole.

Optionally, the second air return channel is inclined from bottom to top toward the direction of the center line.

Optionally, an included angle between the axial direction of the second air return channel and the length direction of the shell is alpha, and alpha is more than 0 degrees and less than or equal to 60 degrees.

Optionally, an included angle between the axial direction of the second air return channel and the length direction of the housing is α, where α=0°.

Optionally, the cross section of the first air return channel is arc-shaped; or the cross section of the first air return channel is square; or the cross section of the first air return channel is trapezoidal.

Optionally, a sliding vane groove is further formed in the air cylinder, and the sliding vane groove is arranged close to the first air return channel.

Optionally, an included angle between the axial direction of the first air return channel and the central line direction of the sliding vane groove is beta, and beta is more than or equal to 10 degrees and less than or equal to 30 degrees.

The utility model also proposes a refrigeration device comprising a compressor as described above.

According to the technical scheme, the first air return channel and the second air return channel are respectively arranged on the air cylinder and the lower bearing, the lower bearing is connected with the shell and is enclosed with the lower part of the shell to form the liquid storage cavity, wherein the air cylinder is connected above the lower bearing, so that the air cylinder is communicated with the liquid storage cavity through the first air return channel and the second air return channel in sequence, and a refrigerant in the liquid storage cavity can smoothly enter the air cylinder for compression treatment; further, the length of the first air return channel is L, the width of the first air return channel is W, the height of the first air return channel is H, the cross section area of the second air return channel is S, WL/S is more than or equal to 0.8 and less than or equal to 1.5,0.6 and H/L is more than or equal to 1.6, so that the sizes of the first air return channel and the second air return channel are in a reasonable range, a refrigerant in a liquid storage cavity can completely enter a cylinder through the second air return channel and the first air return channel to be compressed, the flow resistance of the refrigerant when flowing in the first air return channel and the second air return channel is reduced, the performance of the compressor is kept in an optimal range, the clearance volume of the compression cavity is reduced, and the performance of the compressor is further improved; meanwhile, the deformation possibility of the compressor is reduced, and the service life of the compressor is prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a cross-sectional view of an embodiment of a compressor of the present utility model;

FIG. 2 is a cross-sectional view of another embodiment of the compressor of the present utility model;

FIG. 3 is a cross-sectional view of yet another embodiment of the compressor of the present utility model;

FIG. 4 is a cross-sectional view of a cylinder in an embodiment of a compressor of the present utility model;

FIG. 5 is an enlarged view of a portion of FIG. 4 at A;

FIG. 6 is a schematic view showing a structure of a cylinder in an embodiment of a compressor according to the present utility model;

FIG. 7 is a partial enlarged view at B in FIG. 6;

FIG. 8 is a schematic view showing a structure of a cylinder in another embodiment of a compressor according to the present utility model;

FIG. 9 is a cross-sectional view of a cylinder in an embodiment of a compressor of the present utility model;

FIG. 10 is a cross-sectional view of a cylinder in another embodiment of the compressor of the present utility model;

FIG. 11 is a schematic view showing the structure of a cylinder in a further embodiment of the compressor according to the present utility model;

FIG. 12 is a schematic view showing the structure of a lower bearing in an embodiment of the compressor according to the present utility model;

FIG. 13 is a cross-sectional view of a lower bearing in an embodiment of the compressor of the present utility model;

FIG. 14 is a cross-sectional view of a lower bearing in another embodiment of the compressor of the present utility model;

FIG. 15 is a schematic view showing the structure of an oil cover in an embodiment of the compressor of the present utility model;

FIG. 16 is a cross-sectional view of a crankshaft in an embodiment of a compressor of the present utility model;

fig. 17 is a schematic view showing the structure of an embodiment of the compressor of the present utility model.

Reference numerals illustrate:

the achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, "and/or" throughout this document includes three schemes, taking a and/or B as an example, including a technical scheme, a technical scheme B, and a technical scheme that both a and B satisfy; in addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

Referring to fig. 1 to 7, the present utility model proposes a compressor comprising:

a housing 11;

the air cylinder 12, the first return air channel 121 is arranged on the air cylinder 12; and

the lower bearing 21 is connected to the housing 11, a liquid storage cavity 31 is formed by enclosing the lower bearing 21 and the lower part of the housing 11, the cylinder 12 is connected to the upper part of the lower bearing 21, a second air return channel 211 is arranged on the lower bearing 21, and the cylinder 12 is communicated with the liquid storage cavity 31 through the first air return channel 121 and the second air return channel 211 in sequence;

the length L, the width W and the height H of the first air return channel 121, the cross section area of the second air return channel 211 is S, and WL/S is more than or equal to 0.8 and less than or equal to 1.5,0.6 and H/L is more than or equal to 1.6.

According to the technical scheme of the utility model, the cylinder 12 and the lower bearing 21 are respectively provided with a first air return channel 121 and a second air return channel 211, the lower bearing 21 is connected with the shell 11 and is enclosed with the lower part of the shell 11 to form a liquid storage cavity 31, wherein the cylinder 12 is connected above the lower bearing 21, so that the cylinder 12 is communicated with the liquid storage cavity 31 through the first air return channel 121 and the second air return channel 211 in sequence, and a refrigerant in the liquid storage cavity 31 can smoothly enter the cylinder 12 for compression treatment; further, the length of the first air return channel 121 is defined as L, the width of the first air return channel is defined as W, the height of the first air return channel is defined as H, the cross-sectional area of the second air return channel 211 is defined as S, wherein WL/S is more than or equal to 0.8 and less than or equal to 1.5,0.6 and H/L is more than or equal to 1.6, so that the sizes of the first air return channel 121 and the second air return channel 211 are within a reasonable range, and therefore, the refrigerant in the liquid storage cavity 31 can completely enter the cylinder 12 through the second air return channel 211 and the first air return channel 121 for compression treatment, the flow resistance of the refrigerant when flowing in the first air return channel 121 and the second air return channel 211 is reduced, the performance of the compressor is kept within an optimal range, the clearance volume of the compression cavity is reduced, and the performance of the compressor is further improved; meanwhile, the deformation possibility of the compressor is reduced, and the service life of the compressor is prolonged.

In this embodiment, the compressor further includes an oil cover 41, where the oil cover 41 is connected to a side of the lower bearing 21 facing away from the cylinder 12 and is located in the liquid storage cavity 31, the oil cover 41 and the lower bearing 21 enclose an oil storage cavity 42, and lubricating oil is stored in the oil storage cavity 42, so as to lubricate components in the compression cavity, thereby improving the service life of the compressor and the compression efficiency of the compressor.

Referring to fig. 15, further, the oil cover 41 is provided with a relief hole 43, and the second air return channel 211 is communicated with the liquid storage cavity 31 through the relief hole 43, so that the air cylinder 12 is communicated with the liquid storage cavity 31 through the first air return channel 121 and the second air return channel 211.

In this embodiment, the compressor further includes a connecting piece, the oil cover 41 is provided with a flange, the lower bearing 21 and the cylinder 12 are provided with at least one mounting hole 213, and the oil cover 41, the lower bearing 21 and the cylinder 12 are fixedly connected through the connecting piece and the mounting hole 213.

In an embodiment, the connecting member is a rivet or a screw, the flange, the lower bearing 21 and the mounting hole 213 on the cylinder 12 are disposed opposite to each other, and the rivet or the screw sequentially passes through a plurality of the mounting holes 213, so that the oil cover 41, the lower bearing 21 and the cylinder 12 are fixedly connected to each other, that is, one screw or one rivet passes through the flange of the oil cover 41, the lower bearing 21 and the three mounting holes 213 on the cylinder 12 at the same time to fixedly connect the three, wherein the number of screws or rivets is not limited, and only one screw or rivet may be provided, or a plurality of screws or rivets may be provided.

In another embodiment, the connecting piece includes a first rivet or the first screw, and a second rivet or the second screw, the mounting hole 213 includes a first mounting hole and a second mounting hole, at least one first mounting hole is disposed on the lower bearing 21 and the cylinder 12, at least one second mounting hole is disposed on the flange and the lower bearing 21, the cylinder 12 and the lower bearing 21 are fixedly connected through the first rivet or the first screw and the corresponding first mounting hole, and the oil cover 41 and the lower bearing 21 are fixedly connected through the second rivet or the second screw and the corresponding second mounting hole.

Referring to fig. 16 and 17, specifically, the compressor further includes a crankshaft 14, the crankshaft 14 includes a main shaft portion 141, an eccentric portion 142 and a secondary shaft portion 143 sequentially disposed from top to bottom, the main shaft portion 141 is in contact with an upper bearing, the eccentric portion 142 is in contact with rollers, the secondary shaft portion 143 is in contact with a lower bearing 21, the crankshaft 14 is hollow, so that an oil inlet channel is formed, the oil inlet channel is communicated with the oil storage cavity 42, and further, at least one oil inlet hole is formed on an outer wall surface of the main shaft portion 141, an outer wall surface of the eccentric portion 142 and an outer wall surface of the secondary shaft portion 143, so that lubricating oil in the oil storage cavity 42 enters positions corresponding to the main shaft portion 141, the eccentric portion 142 and the secondary shaft portion 143 through the oil inlet channel and the oil inlet hole, respectively, so that three contact positions of the main shaft portion 141, the eccentric portion 142 and the secondary shaft portion 143 have sufficient lubricating oil, thereby reducing friction, improving service life of the compressor, and improving energy consumption and reliability of the compressor.

Referring to fig. 1 to 3, the compressor further includes an oil applying vane 15, where the oil applying vane 15 is installed in the oil inlet channel 145 and is disposed near the oil cover 41, and the crankshaft 14 drives the oil applying vane 15 to rotate together when rotating, so as to guide the lubricating oil in the oil storage cavity 42 to flow into corresponding areas such as the main shaft portion 141, the eccentric portion 142, and the auxiliary shaft portion 143 through the oil inlet channel 145 of the crankshaft 14, and the principle that the lubricating oil enters the crankshaft 14 from the oil storage cavity 42 is that: centrifugal force is generated when the crankshaft 14 rotates, and the lubricating oil is sucked into the oil inlet passage 145 by the centrifugal force.

Referring to fig. 2, in an embodiment, the compressor further includes an oil pump housing 16, the oil pump housing 16 is mounted at an end of the sub-shaft portion 143 facing away from the eccentric portion 142, the oil pump housing 16 is located in the oil storage chamber 42, and the oil in the oil storage chamber 42 is more easily introduced into the oil inlet passage 145 through the oil pump housing 16 by passing through the oil pump housing 16.

Referring to fig. 3, in another embodiment, the auxiliary shaft portion 143 extends in a direction approaching the oil storage chamber 42 such that the auxiliary shaft portion 143 extends into the oil storage chamber 42, and the auxiliary shaft portion 143 is extended such that the lubricating oil in the oil storage chamber 42 is more easily introduced into the oil inlet passage 145.

It should be noted that, the crankshaft 14 is hollow, and though penetrating the whole crankshaft 14, and the upper side of the crankshaft 14 extends into the motor 13, firstly the motor 13 does not need lubrication, the motor 13 is composed of a stator and a rotor, the crankshaft 14 and the rotor are fixed together, and a gap exists between the rotor and the stator, so that no contact exists between the rotor and the stator, no friction is generated, and no lubricating oil is needed; secondly, the lubricating oil generally does not flow into the motor 13 through the topmost end of the crankshaft 14 because the lubricating oil is lifted by the centrifugal force of the rotation of the crankshaft 14 and the stirring of the oiling blade 15, and the lubricating oil is not so high depending on the position of the oiling blade 15.

Further, the cylinder 12 is further provided with a first oil return channel 122, the lower bearing 21 is further provided with a second oil return channel 212, and when the lubricating oil in the oil storage cavity 42 enters the main shaft portion 141, the auxiliary shaft portion 143, the eccentric portion 142 or is diffused to other parts through the oil inlet channel and the oil inlet hole to complete the lubrication, the lubricating oil flows back into the oil storage cavity 42 through the first oil return channel 122 and the second oil return channel 212, so that the whole lubrication process is completed.

However, after the lubricating oil is lubricated through the oil inlet passage and the oil inlet hole, most of the lubricating oil is liquefied after contacting with the coil, rotor, etc. of the motor 13 at high temperature, and then flows back to the oil storage chamber 42 through the first oil return passage 122 and the second oil return passage 212, so that the next lubrication is repeated, but a small portion of the lubricating oil is mixed with the refrigerant, so that the refrigerant enters the condenser through the exhaust pipe in the upper space of the motor 13 along with the high-pressure refrigerant, thereby participating in heat exchange, and finally, the refrigerant mixed with the high-pressure refrigerant enters the liquid storage chamber 31.

It can be appreciated that long-term reciprocating operation can cause more and more of the lubricating oil in the liquid storage cavity to accumulate, so that the content of the lubricating oil in the refrigerant is increased, the refrigerating and heating efficiency of the refrigerant is affected, meanwhile, the lubricating oil in the oil pool is reduced, the lubricating oil supply is insufficient for a long time, the inside of the cylinder 12 cannot be sufficiently lubricated, the working efficiency of the cylinder 12 is reduced, the compression efficiency of the compressor is reduced, and the service life of the cylinder 12 is also reduced.

Referring to fig. 17, therefore, in order to solve the above problem, in this embodiment, the compressor further includes an oil return pipe 33, one end of the oil return pipe 33 is connected to the liquid storage chamber 31, the other end of the oil return pipe 33 penetrates into the first air return channel 121 through the second air return channel 211, and the lubricating oil in the liquid storage chamber 31 can flow back into the cylinder 12 through the oil return pipe 33, because when the compressor is running, the pressure near the air inlet of the cylinder 12 is very low, and the pressure in the liquid storage chamber is higher than the air inlet of the cylinder 12, and at the same time, the refrigerant near the air inlet of the cylinder 12 flows, and the oil at the bottom of the liquid storage chamber is pumped into the cylinder 12 through the oil return pipe 33 by the pressure difference and pulsation, so as to lubricate the cylinder 12, and most of the lubricating oil is liquefied after contacting with the coil, rotor, etc. of the high-temperature motor 13, and then flows back into the oil storage chamber 42 through the first oil return channel 122 and the second oil return channel 212, so that the lubricating oil in the cylinder 12 can always keep enough lubricating the inside the cylinder 12, thereby improving the working efficiency of the cylinder 12, and further improving the working efficiency of the compressor, and the service life of the compressor.

Referring to fig. 1, 2, 3 and 13, in the present embodiment, the second air return passage 211 is inclined from bottom to top toward the center line Y, and it is understood that the oil cover 41 is installed in the middle of the oil storage chamber 31, so that the compressor is miniaturized in order to reduce the size of the compressor, and thus the interval between the side wall of the oil storage chamber 31 and the side wall of the oil cover 41 is small, while the cylinder 12 is installed in the middle of the bearing, so that the oil storage chamber 31 and the cylinder 12 are conveniently communicated, and thus the second air return passage 211 is inclined, so that the size of the compressor is conveniently reduced.

Of course, in other embodiments, the second air return channel 211 may be provided with an oil return channel in a bent shape, but the angle of the corner of the bent shape should not be too large, for example, not be as right angle as possible, and the corner should be as arc-shaped as possible, because when the refrigerant flows into the cylinder 12 from the liquid storage cavity 31, if the corner is right angle, the refrigerant will generate turbulence when flowing, and further noise is generated, so that the experience of the user is reduced.

Specifically, in one embodiment, the angle between the axial direction of the second air return channel 211 and the longitudinal direction of the housing 1111 is α, and 0 ° < α+.ltoreq.60 °; if alpha is more than 60 degrees, the noise generated when the refrigerant flows into the cylinder 12 from the liquid storage cavity 31 is larger, so that alpha is more than or equal to 0 degrees and less than or equal to 60 degrees, the noise is reduced, the experience of a user is improved, meanwhile, the production and processing of the second air return channel 211 are facilitated, the production and processing efficiency is improved, and the production and manufacturing cost is reduced.

Referring to fig. 14, in another embodiment, an angle between the axial direction of the second air return channel 211 and the length direction of the housing 1111 is α, where α=0°, when the gap between the side wall of the oil cover 41 and the side wall of the liquid storage chamber 31 is located right below the first air return channel 121 of the cylinder 12, the angle between the axial direction of the second air return channel 211 and the length direction of the housing 1111 is 0 °, that is, the second air return channel 211 is directly vertically downward, so that the refrigerant in the liquid storage chamber 31 directly vertically enters into the cylinder 12 upward, thereby accelerating the transmission efficiency of the refrigerant in the liquid storage chamber 31, reducing the generation of noise, and further improving the experience of the user.

Referring to fig. 8 to 11, it can be understood that, in an embodiment, the inner wall surface of the first air return channel 121 is disposed in an arc shape, and by disposing the inner wall surface of the first air return channel 121 in an arc shape, the possibility of turbulence generated when the refrigerant flows into the first air return channel 121 from the second air return channel 211 is reduced, noise generated in the first air return channel 121 is reduced, and thus the experience of the user is further improved.

In another embodiment, the cross section of the first air return channel is square, and the cross section of the first air return channel is trapezoid; thereby increasing the included angle of the refrigerant flowing into the first air return channel, reducing the possibility of turbulent flow generated when the refrigerant flows into the first air return channel 121 from the second air return channel 211, reducing noise generated in the first air return channel 121, and further improving the experience of the user.

Referring to fig. 6 to 8, in this embodiment, the compressor further includes a sliding vane, the cylinder 12 is further provided with a sliding vane groove 123, the sliding vane groove 123 is disposed near the first air return channel 121, the crankshaft 14 drives the piston to rotate, the outer diameter of the piston contacts with the inner diameter of the cylinder 12, the refrigerant in the low pressure chamber is compressed into high pressure by volume change, the sliding vane moves back and forth, one end of the sliding vane is against the outer diameter of the piston, the sliding vane groove 123 is disposed near the first air return channel 121 to prevent the refrigerant in the high pressure chamber from leaking, and it is understood that the sliding vane also needs to be lubricated by lubricating oil to move back and forth in the sliding vane groove 123, so that friction generated by the sliding vane back and forth movement is reduced, and the service life of the compressor is improved.

Specifically, the included angle between the axial direction of the first air return channel 121 and the central line direction of the sliding vane groove 123 is β, and β is 10 ° or less and 30 °, because the first air return channel 121 and the second air return channel 211 are mutually communicated, the first air return channel 121 and the sliding vane groove 123 are close to each other, and the refrigerant entering through the lower bearing 21 can enter the cylinder 12 without blocking by making β is 10 ° or less and 30 °, so that the flow area is optimal and the flow resistance is minimum.

The utility model also provides a refrigeration device which comprises a compressor, wherein the specific structure of the compressor refers to the embodiment, and as the refrigeration device adopts all the technical schemes of all the embodiments, the refrigeration device at least has all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted.

The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all the equivalent structural changes made by the description of the present utility model and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims

1. A compressor, comprising:

a housing;

the cylinder is provided with a first air return channel; and

2. The compressor of claim 1, further comprising an oil cap coupled to a side of the lower bearing facing away from the cylinder and positioned within the reservoir.

3. The compressor of claim 2, wherein the oil cover is provided with a relief hole, and the second return air passage is communicated with the liquid storage cavity through the relief hole.

4. The compressor of claim 1, wherein the second return air passage is inclined from bottom to top toward the centerline.

5. The compressor of claim 4, wherein an angle between an axial direction of the second return air passage and a length direction of the housing is α,0 ° < α being equal to or less than 60 °.

6. The compressor of claim 1, wherein an angle between an axial direction of the second return air passage and a length direction of the housing is α, the α=0°.

7. The compressor of claim 1, wherein a cross section of the first return air passage is arcuate; or (b)

The cross section of the first air return channel is square; or (b)

The cross section of the first air return channel is trapezoidal.

8. The compressor of claim 1, wherein the cylinder is further provided with a vane slot, the vane slot being disposed proximate the first return air passage.

9. The compressor of claim 8, wherein an angle between an axial direction of the first return air passage and a center line direction of the vane groove is β,10 ° β being less than or equal to 30 °.

10. A refrigeration device comprising a compressor as claimed in any one of claims 1 to 9.