Compressor

Abstract

The utility model provides a compressor. The compressor comprises a front shell, a middle shell and a rear shell, the first end of the middle shell is connected with the front shell to form an exhaust cavity, and an air inlet is formed in the shell wall of the second end of the middle shell. The rear shell is connected with the second end of the middle shell, a first side face, facing the middle shell, of the rear shell is provided with an auxiliary bearing seat, a plurality of refrigerant flow guide grooves surrounding the auxiliary bearing seat, binding posts and refrigerant flow guide pieces, the refrigerant flow guide grooves are arranged in a concentric circle mode, and a second side face, deviating from the middle shell, of the rear shell is provided with a control cavity for containing a first heating component. The refrigerant flow guide grooves and the first heating component form overlapping areas based on the projection area of the first side face, and the refrigerant flow guide piece is located at the tail of at least one refrigerant flow guide groove of the outer ring and guides refrigerants flowing out of the refrigerant flow guide grooves of the outer ring to penetrate through a flow channel gap between the auxiliary bearing seat and the binding post. According to the utility model, the heat dissipation efficiency of heating components can be obviously enhanced, the pressure loss of refrigerants is reduced, the running performance of the compressor is improved, and the service life of the compressor is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of refrigeration equipment, in particular to a compressor. Background Art

[0002] The compressor controller integrates a variety of heating elements, and the overall temperature is relatively high. It only relies on conventional shell heat conduction to dissipate heat, which has low heat dissipation performance and can easily affect the service life of the compressor and may cause damage to the controller.

[0003] The existing technologies for compressor heat dissipation are:

[0004] Patent CN220227173U, the application provides a compressor and a vehicle, the compressor includes: a control component, a supercharging component, a shell and a spacer; the shell is provided with a housing chamber; the spacer is provided in the housing chamber, and the spacer is used to separate the housing chamber into a first sub-housing chamber and a second sub-housing chamber that are connected along the axial direction of the shell; the supercharging component is provided in the second sub-housing chamber; wherein the control component is provided on the side wall of the first sub-housing chamber away from the second sub-housing chamber, and the first sub-housing chamber is provided with a guide channel and an air inlet connected to the guide channel, the projection of the guide channel along the axial direction overlaps with the projection of the control component along the axial direction, and the guide channel is connected to the second sub-housing chamber. Through the above method, the working efficiency and reliability of the compressor can be effectively improved. Based on this method, when the compressor takes in low-pressure refrigerant gas along the air inlet, the low-pressure refrigerant gas will flow along the guide channel through the area where the control component is located, and then enter the second sub-containing chamber, thereby effectively preventing the low-pressure refrigerant gas from being directly introduced into the second sub-containing chamber, and thus enabling the low-pressure refrigerant gas to effectively dissipate heat to the control component, thereby improving the working efficiency and reliability of the compressor.

[0005] The patent CN220227173U has the problem of incomplete heat dissipation and limited efficiency, mainly because there is no comprehensive heat dissipation design for the entire controller, but focuses on the improvement of specific components. In addition, the heat dissipation channel is an independent component, and the assembly requirements are relatively high.

[0006] Patent CN115013287A, the utility model forms a channel from the air inlet through the chamber to the air outlet, one or more fins divide the channel into several flow channels, one end of the fin is arranged close to the air inlet, one end of the fin is bent in the direction of the air inlet, the fin is streamlined, and the curvature of at least a part of the fin is consistent with the curvature of the inner wall of the adjacent air inlet cavity. The patent uses refrigerant to flow from the air inlet through the middle shell, the air outlet to the exhaust channel for discharge. During this period, the refrigerant exchanges heat with the rear shell in the flow channel, and the rear shell absorbs a large amount of heat emitted from the core power device installation area, thereby reducing the temperature of the entire controller, increasing the service life of the compressor, and avoiding damage to the controller.

[0007] The patent CN115013287A emphasizes that the back shell absorbs the heat dissipated by the core power device, but does not mention other components or areas that may need heat dissipation. If the heat dissipation requirements of other components are ignored, it may lead to insufficient local heat dissipation, affecting the stability and performance of the entire controller. In addition, the heat dissipation path of this solution is single.

[0008] Therefore, the utility model provides a compressor. Utility Model Content

[0009] In view of the problems in the prior art, the purpose of the present invention is to provide a compressor that overcomes the difficulties of the prior art, can significantly enhance the heat dissipation efficiency of heat-generating components, reduce the pressure loss of the refrigerant, and improve the operating performance and service life of the compressor.

[0010] An embodiment of the utility model provides a compressor, comprising:

[0011] front shell;

[0012] A middle shell, wherein a first end of the middle shell is connected to the front shell to form an exhaust cavity for accommodating the motor assembly, and a shell wall of a second end of the middle shell is provided with an air inlet; and

[0013] A rear shell is connected to the second end of the middle shell, and the rear shell is provided with a centrally located auxiliary bearing seat, a plurality of refrigerant guide grooves surrounding the auxiliary bearing seat, a terminal post and at least one refrigerant guide plate on the first side of the rear shell facing the middle shell, and the refrigerant guide grooves are arranged in concentric circles. A control chamber for accommodating a first heating component is provided on the second side of the rear shell away from the middle shell, and the refrigerant guide groove and the first heating component respectively form overlapping areas based on the projection area of ​​the first side, and the refrigerant guide plate is located at the tail of at least one refrigerant guide groove of the outer ring, guiding the refrigerant flowing out of the refrigerant guide groove of the outer ring to pass through the flow channel gap between the auxiliary bearing seat and the terminal post.

[0014] Preferably, it also includes a second heat-generating component, which is arranged in the control chamber, and the first projection of the first heat-generating component based on the first side surface, the terminal and the second projection of the second heat-generating component based on the first side surface are arranged in sequence along the flow direction of the refrigerant, and together surround the secondary bearing seat, and the refrigerant passing through the flow channel gap reaches the projection area of ​​the second heat-generating component based on the first side surface in the rear shell.

[0015] Preferably, the first end of the refrigerant guide plate is connected to the inner wall of the rear shell, and the second end moves inward from the tail of the refrigerant guide groove toward the axis of the compressor to guide several refrigerant guide grooves in the outermost circle to merge and flow into the flow channel gap.

[0016] Preferably, the terminal post is arranged along the inner wall of the rear shell, and a flow channel gap is formed between the inner side of the terminal post and the auxiliary bearing seat, and the flow channel gap is located on the extension trajectory of the refrigerant guide groove of the innermost circle.

[0017] Preferably, the rear shell includes at least a circular arc-shaped slope area surrounding the auxiliary bearing seat and a plane area that is retracted toward one side away from the middle shell, and the first side surface of the rear shell is provided with a plurality of guide fins passing through the slope area and the plane area, and a plurality of refrigerant guide grooves surrounding the auxiliary bearing seat are formed between the guide fins.

[0018] Preferably, a confluence groove for confluence of the refrigerant in at least two refrigerant guide grooves of the outer circle is formed between the inner side of the refrigerant guide plate and the outer side of one of the guide fins located in the inner circle.

[0019] Preferably, the tail end of the guide fin of the outermost circle is located upstream of the first end of the refrigerant guide plate.

[0020] Preferably, the second end of the refrigerant guide plate is flush with the tail ends of a plurality of the guide fins located in the inner circle in the direction of a straight line based on a radius of the rear shell.

[0021] Preferably, the head end of the guide fin extends to the air inlet.

[0022] Preferably, the refrigerant guide plate and the guide fins are both integrally formed on the first side surface of the rear shell.

[0023] The compressor of the utility model can significantly enhance the heat dissipation efficiency of heat-generating components, reduce the pressure loss of the refrigerant, and improve the operating performance and service life of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Other features, objectives and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings.

[0025] Figure 1 It is a radial cross-sectional view of the compressor of the present utility model.

[0026] Figure 2 It is an axial cross-sectional view of the compressor of the present utility model.

[0027] Reference numerals

[0028] 1 Middle shell

[0029] 2 Back cover

[0030] 3. The first heat generating component

[0031] 4 Slope area

[0032] 41 First tank inlet

[0033] 42 Second tank inlet

[0034] 43 Third tank inlet

[0035] 44 First refrigerant guide groove

[0036] 45 Second refrigerant guide groove

[0037] 46 Third refrigerant guide groove

[0038] 47 Fourth refrigerant guide groove

[0039] 5 Plane area

[0040] 6 Air Inlet

[0041] 7 Motor assembly

[0042] 8 Guide fins

[0043] 10 Binding Posts

[0044] 11. Second heat generating component

[0045] 12 Refrigerant drainage sheet

[0046] 13 Auxiliary bearing seat

[0047] 14 Confluence Area DETAILED DESCRIPTION

[0048] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein. Instead, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0049] Figure 1 It is a radial cross-sectional view of the compressor of the present utility model. Figure 2 FIG. 1 is an axial cross-sectional view of the compressor of the utility model. Figure 1 and 2As shown, the compressor of the utility model comprises: a front shell (not shown in the figure), a middle shell 1 and a rear shell 2. The first end of the middle shell 1 is connected to the front shell to form an exhaust cavity for accommodating the motor assembly 7, and the shell wall of the second end of the middle shell 1 is provided with an air inlet 6. The rear shell 2 is connected to the second end of the middle shell 1, and the rear shell 2 is provided with a central auxiliary bearing seat 13, a plurality of refrigerant guide grooves surrounding the auxiliary bearing seat 13, a terminal 10 and at least one refrigerant guide plate 12 on the first side of the rear shell 2 facing the middle shell 1, and the refrigerant guide grooves are arranged in concentric circles. The second side of the rear shell 2 away from the middle shell 1 is provided with a control chamber for accommodating the first heating element 3, and the refrigerant guide groove and the first heating element 3 respectively form overlapping areas based on the projection area of ​​the first side. The refrigerant guide plate 12 is located at the tail of at least one refrigerant guide groove of the outer ring, and guides the refrigerant flowing out of the refrigerant guide groove of the outer ring to pass through the flow channel gap between the auxiliary bearing seat 13 and the terminal 10. Since the compressor controller integrates a variety of heating elements, the overall temperature is high. Low heat dissipation performance can easily affect the service life of the compressor and may also cause damage to the controller. The utility model is particularly suitable for vehicle-mounted horizontal compressors. Since the spatial layout of vehicle-mounted horizontal compressors is very limited, in order to avoid heat concentration, various heat-generating components must be arranged separately. Due to space limitations and the blocking of the refrigerant flow channel by the terminal 10, heat dissipation is more difficult. The utility model uses imported low-temperature refrigerant to guide the refrigerant to the bottom of the rear shell. The bottom of the rear shell is used as a heat conduction medium. The refrigerant exchanges heat with the surface of the rear shell, taking away the heat of the heat-generating components on the back of the rear shell. In addition, the utility model transports part of the refrigerant at the tail end of the arc-shaped guide groove to the other side along the trajectory of the arc-shaped guide groove, making fuller use of the cooling effect of the refrigerant and improving the cooling effect, so as to adapt to the complex heat dissipation requirements in highly integrated small horizontal compressors and achieve better heat dissipation effects.

[0050] The compressor in this embodiment includes a plurality of heat-generating components and terminals, but in order to avoid heat concentration, the heat-generating components are usually arranged separately on both sides of the terminals 10 along the circumference around the auxiliary bearing seat 13. This layout is conducive to avoiding the heat dissipation concentration of multiple heat-generating components, but the existence of the terminals 10 will block the flow of the refrigerant, reducing the heat dissipation of the heat-generating components located downstream of the terminals 10. In a preferred embodiment, it also includes: a second heat-generating component 11, which is arranged in the control chamber, and the first heat-generating component 3 is arranged in sequence along the flow direction of the refrigerant based on the first projection of the first side surface, the terminals 10, and the second heat-generating component 11 are arranged in sequence based on the second projection of the first side surface, and they surround the auxiliary bearing seat 13 together, and the refrigerant passing through the flow channel gap reaches the projection area of ​​the second heat-generating component 11 in the rear shell 2 based on the first side surface. In this embodiment, the refrigerant enters the first refrigerant guide groove 44, the second refrigerant guide groove 45, the third refrigerant guide groove 46 and the fourth refrigerant guide groove 47 from the inlet, first performs heat exchange cooling on the main heat-generating components, and then cools other heat-generating components (the second heat-generating component 11) through the annular flow space. The utility model designs a refrigerant guide plate 12 at the tail of the guide groove to gather the refrigerant in the space between the terminal and the auxiliary bearing seat, so that the refrigerant is continuously transported to the rear end to cool other heat-generating components.

[0051] In a preferred embodiment, the first end of the refrigerant guide plate 12 is connected to the inner wall of the rear shell 2, and the second end moves inward from the tail of the refrigerant guide groove toward the axis of the compressor, guiding several refrigerant guide grooves in the outermost circle to merge and flow into the flow channel gap, but not limited to this.

[0052] In a preferred embodiment, the terminal 10 is arranged along the inner wall of the rear shell 2, and a flow channel gap is formed between the inner side of the terminal 10 and the auxiliary bearing seat 13. The flow channel gap is located on the extension trajectory of the refrigerant guide groove of the innermost circle, but not limited to this.

[0053] In a preferred embodiment, the rear shell 2 includes at least a circular arc-shaped slope area 4 surrounding the auxiliary bearing seat 13 and a plane area 5 that is retracted toward the side away from the middle shell 1. The first side surface of the rear shell 2 is provided with a plurality of guide fins 8 passing through the slope area 4 and the plane area 5, and a plurality of refrigerant guide grooves surrounding the auxiliary bearing seat 13 are formed between the guide fins 8, but this is not limited to this.

[0054] In a preferred embodiment, a confluence groove for confluence of the refrigerant in at least two refrigerant guide grooves of the outer circle is formed between the inner side of the refrigerant guide plate 12 and the outer side of a guide fin 8 located in the inner circle, but the present invention is not limited thereto.

[0055] In a preferred embodiment, the tail end of the outermost circle of guide fins 8 is located upstream of the first end of the refrigerant guide plate 12, but not limited thereto.

[0056] In a preferred embodiment, the second end of the refrigerant guide plate 12 is flush with the tail ends of the plurality of guide fins 8 located in the inner circle in the direction of a straight line based on a radius of the rear shell 2 , but the present invention is not limited thereto.

[0057] In a preferred embodiment, the head end of the guide fin 8 extends to the air inlet 6 , but the present invention is not limited thereto.

[0058] In a preferred embodiment, the refrigerant guide plate 12 and the guide fin 8 are both integrally formed on the first side surface of the rear shell 2, but the present invention is not limited thereto.

[0059] The specific implementation of the utility model is as follows:

[0060] Continue to refer Figure 1 and 2The first end of the middle shell 1 in the compressor of the utility model is connected to the front shell to form an exhaust cavity for accommodating the motor assembly 7, and the shell wall of the second end of the middle shell 1 is provided with an air inlet 6. The rear shell 2 is connected to the second end of the middle shell 1, and the rear shell 2 is provided with a centrally located auxiliary bearing seat 13, a plurality of refrigerant guide grooves surrounding the auxiliary bearing seat 13, a terminal 10 and at least one refrigerant guide plate 12 on the first side of the rear shell 2 facing the middle shell 1. The refrigerant guide grooves are arranged in concentric circles, and the second side of the rear shell 2 away from the middle shell 1 is provided with a control chamber for accommodating the first heating element 3. The refrigerant guide groove and the first heating element 3 respectively form overlapping areas based on the projection area of ​​the first side. The refrigerant guide plate 12 is located at the tail of at least one refrigerant guide groove of the outer ring, and guides the refrigerant flowing out of the refrigerant guide groove of the outer ring to pass through the flow channel gap between the auxiliary bearing seat 13 and the terminal 10. The second heating element 11 is arranged in the control chamber, and the first heating element 3 based on the first projection of the first side surface, the terminal 10 and the second heating element 11 based on the second projection of the first side surface are arranged in sequence along the flow direction of the refrigerant, and together surround the auxiliary bearing seat 13, and the refrigerant passing through the flow channel gap reaches the projection area of ​​the second heating element 11 based on the first side surface in the rear shell 2. The first end of the refrigerant guide plate 12 is connected to the inner wall of the rear shell 2, and the second end moves inward from the tail of the refrigerant guide groove toward the axis of the compressor, guiding the confluence of several refrigerant guide grooves in the outermost circle to flow to the flow channel gap. The terminal 10 is arranged along the inner wall of the rear shell 2, and a flow channel gap is formed between the inner side of the terminal 10 and the auxiliary bearing seat 13, and the flow channel gap is located on the extension trajectory of the refrigerant guide groove in the innermost circle. The rear shell 2 includes at least a section of an arc-shaped sloped area 4 around the auxiliary bearing seat 13 and a plane area 5 that shrinks inward toward one side away from the middle shell 1. The first side surface of the rear shell 2 is provided with a plurality of guide fins 8 passing through the sloped area 4 and the plane area 5, and a plurality of refrigerant guide grooves around the auxiliary bearing seat 13 are formed between the guide fins 8. A confluence groove for the confluence of refrigerants in at least two refrigerant guide grooves of the outer circle is formed between the inner side of the refrigerant guide plate 12 and the outer side of a guide fin 8 located in the inner circle. The tail end of the guide fin 8 of the outermost circle is located upstream of the first end of the refrigerant guide plate 12. The second end of the refrigerant guide plate 12 is flush with the tail ends of the plurality of guide fins 8 located in the inner circle in the straight line direction based on a radius of the rear shell 2. The head end of the guide fin 8 extends to the air inlet 6. The refrigerant guide plate 12 and the guide fin 8 are both integrally formed on the first side surface of the rear shell 2.

[0061] When the compressor refrigerant enters the control chamber from the air inlet 6, it first enters the entrance of each guide groove (the first refrigerant guide groove 44, the second refrigerant guide groove 45, the third refrigerant guide groove 46 and the fourth refrigerant guide groove 47), and then under the guidance of the arc-shaped guide groove, it first flows to the location of the first heat-generating component 3 to achieve a cooling effect. The guide fins, through their special shape and layout, guide the refrigerant into the flow gap between the auxiliary bearing seat 13 and the terminal 10 at the tail end of the arc-shaped fins of the rear shell of the scroll compressor, so that the refrigerant flowing out of the outermost third refrigerant guide groove 46 and the fourth refrigerant guide groove 47 can avoid the terminal 10. By guiding the outermost refrigerant to pass through the flow gap between the auxiliary bearing seat 13 and the terminal 10, more refrigerant can reach the corresponding area of ​​the second heat-generating component 11 to dissipate the heat of the second heat-generating component 11 (including the heat dissipation of the terminal 10), optimize the flow path of the refrigerant, and thus enhance the cooling effect on this area, ensuring that it can timely and effectively dissipate the heat of the heat-generating components in multiple different areas surrounding the auxiliary bearing seat 13, so as to maintain the stable operation and performance of the scroll compressor.

[0062] When a guide vane is provided on the fin heat dissipation structure of the scroll compressor rear shell, its function can be described by the following formula:

[0063] 1. Heat dissipation efficiency:

[0064] Heat dissipation efficiency = heat dissipation / (refrigerant flow velocity × fin surface area)

[0065] After adding the guide plate, the heat dissipation remains unchanged, but the flow velocity of the cooling medium increases, making it easier to bring the coolant into the capacitor area, thereby increasing the heat dissipation efficiency, but this is not limited to this.

[0066] 2. Improved heat uniformity:

[0067] Heat uniformity = temperature of the highest temperature area - temperature of the lowest temperature area

[0068] Adding guide and drainage plates can reduce local overheating or insufficient cooling (in the present invention, if no guide and drainage plates are added, the refrigerant will easily flow to the corners to form dead zones), thereby improving heat uniformity.

[0069] 3. Fin load-bearing capacity is enhanced:

[0070] Load-bearing capacity = fin material strength × fin geometry parameters

[0071] The addition of guide vanes can increase the overall structural strength and improve the load-bearing capacity of the fins, but is not limited to this.

[0072] 4. Improved system performance:

[0073] Overall performance = heat dissipation efficiency × heat uniformity × fin load capacity

[0074] Adding guide vanes can improve system performance by increasing heat dissipation efficiency, improving heat uniformity, and enhancing fin load-bearing capacity, but is not limited thereto.

[0075] The utility model can enhance the heat dissipation efficiency: the guide vanes can change the flow pattern of the refrigerant in the fin structure and optimize the cooling effect. By guiding the flow direction of the refrigerant, they can ensure that the cooling medium stays on the fin surface for a longer time, thereby increasing the heat dissipation efficiency. The utility model can also improve the heat uniformity: the guide vanes can help balance the heat distribution on the fin structure and prevent local overheating or insufficient cooling areas. This helps to ensure that the entire heat dissipation system works more evenly and stably. The utility model can enhance the load-bearing capacity of the fins: the guide vanes can increase the strength and stability of the fin structure to a certain extent, so that it can better withstand the flow pressure and temperature changes of the cooling medium and extend its service life. The utility model is conducive to improving system performance: by optimizing the heat dissipation structure, the overall system performance may be improved. Components with lower temperatures usually have better performance and reliability, so by improving the heat dissipation efficiency, the performance and reliability of the scroll compressor will be indirectly improved.

[0076] In summary, the purpose of the utility model is to provide a compressor that can significantly enhance the heat dissipation efficiency of heat-generating components, reduce the pressure loss of the refrigerant, and improve the operating performance and service life of the compressor.

[0077] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A compressor, characterized in that: include: front shell; A middle shell (1), wherein a first end of the middle shell (1) is connected to the front shell to form an exhaust cavity for accommodating a motor assembly (7), and a shell wall at a second end of the middle shell (1) is provided with an air inlet (6); and A rear shell (2) is connected to the second end of the middle shell (1), and the rear shell (2) is provided with a centrally located auxiliary bearing seat (13), a plurality of refrigerant guide grooves surrounding the auxiliary bearing seat (13), a terminal (10) and at least one refrigerant guide plate (12) on the first side surface of the middle shell (1), wherein the refrigerant guide grooves are arranged in concentric circles, and a control chamber for accommodating a first heating element (3) is provided on the second side surface of the rear shell (2) away from the middle shell (1), and the refrigerant guide grooves and the first heating element (3) respectively form overlapping areas based on the projection area of ​​the first side surface, and the refrigerant guide plate (12) is located at the tail of at least one refrigerant guide groove of the outer ring, and guides the refrigerant flowing out of the refrigerant guide groove of the outer ring to pass through the flow channel gap between the auxiliary bearing seat (13) and the terminal (10).

2. The compressor according to claim 1, characterized in that It also includes a second heat-generating component (11) disposed in the control chamber, wherein the first heat-generating component (3) is arranged in sequence along the flow direction of the refrigerant based on a first projection of the first side surface, the terminal (10) and the second heat-generating component (11) are arranged in sequence based on a second projection of the first side surface, and together surround the auxiliary bearing seat (13), and the refrigerant passing through the flow channel gap reaches the projection area of ​​the second heat-generating component (11) based on the first side surface in the rear shell (2).

3. The compressor according to claim 2, characterized in that The first end of the refrigerant guide plate (12) is connected to the inner wall of the rear shell (2), and the second end moves inward from the tail of the refrigerant guide groove toward the axis of the compressor, guiding several refrigerant guide grooves in the outermost circle to merge and flow into the flow channel gap.

4. The compressor according to claim 3, characterized in that The terminal post (10) is arranged along the inner wall of the rear shell (2), and a flow channel gap is formed between the inner side of the terminal post (10) and the auxiliary bearing seat (13), and the flow channel gap is located on the extension trajectory of the refrigerant guide groove of the innermost circle.

5. The compressor according to claim 3, characterized in that The rear shell (2) includes at least a circular arc-shaped slope area (4) surrounding the auxiliary bearing seat (13) and a plane area (5) that is indented toward one side away from the middle shell (1), and the first side surface of the rear shell (2) is provided with a plurality of guide fins (8) passing through the slope area (4) and the plane area (5), and a plurality of refrigerant guide grooves surrounding the auxiliary bearing seat (13) are formed between the guide fins (8).

6. The compressor according to claim 5, characterized in that A confluence groove for confluence of the refrigerant of at least two refrigerant guide grooves of the outer circle is formed between the inner side of the refrigerant guide plate (12) and the outer side of a guide fin (8) located in the inner circle.

7. The compressor according to claim 6, characterized in that The tail end of the guide fin (8) of the outermost circle is located upstream of the first end of the refrigerant guide plate (12).

8. The compressor according to claim 7, characterized in that The second end of the refrigerant guide plate (12) is flush with the tail ends of a plurality of the guide fins (8) located in the inner circle in the direction of a straight line based on a radius of the rear shell (2).

9. The compressor according to claim 7, characterized in that The head end of the guide fin (8) extends to the air inlet (6).

10. The compressor according to claim 7, characterized in that The refrigerant guide plate (12) and the guide fin (8) are both integrally formed on the first side surface of the rear shell (2).

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