Air guide oil return cover and compressor
By using a gas guide and oil return shroud in a rotary compressor to improve the refrigerant airflow path and the refrigeration oil return channel, the problem of oil return channel blockage caused by direct refrigerant gas blowing out is solved, thus improving the reliability of the compressor.
Patent Information
- Application Number
- CN202520242987.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-14
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-02-14
AI Technical Summary
In rotary compressors, the lack of obstructions between the pump body and the stator causes refrigerant gas to be blown out directly, resulting in blockage of the oil return channel. This prevents the refrigeration oil from flowing back smoothly, affecting the reliability of the compressor.
An oil return shroud is adopted, with a frustoconical design including a flange end. By improving the refrigerant airflow path, the oil return resistance of the compressor's refrigeration oil is reduced, while the oil return channel of the refrigeration oil is improved to enhance the compressor's reliability.
By improving the refrigerant airflow path and the refrigeration oil return channel, the resistance to refrigeration oil return inside the compressor is reduced, thereby improving the compressor's reliability.
Smart Images
Figure CN223689953U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a compressor technical field especially relates to a guide oil return cover and compressor. BACKGROUND
[0002] Rotary compressor generally includes the casing and the motor and the pump body structure coaxially arranged in the casing, the motor sets up at the top of pump body structure, and drives the pump body structure to the refrigerant through the crankshaft, the motor usually is constituted by the stator and the rotor, through the fixed connection of the outer peripheral wall of stator and the inner peripheral wall of casing, and the outer peripheral wall part of stator is concave inward to form the oil return passage for the backfall of refrigerator oil.
[0003] However, since there is no barrier between the pump body structure and the stator, when the pump body structure operates, the refrigerant gas discharged upward by the pump body structure is easily blown directly into the oil return passage between the stator and the casing, causing the oil return passage to be blocked or closed, and the refrigerator oil above the stator cannot smoothly fall to the lower part of the casing through the oil return passage, resulting in the phenomenon of oil deficiency in the lower part of the casing, thereby affecting the operation of the pump body structure. SUMMARY
[0004] Therefore, the purpose of the utility model is to overcome the shortcomings of the prior art, provide a guide oil return cover and compressor, according to the guide oil return cover and compressor of the utility model embodiment, the oil return resistance of the refrigerator oil in the compressor is reduced by improving the airflow path of the refrigerant, and the reliability of the compressor is improved by improving the oil return passage of the refrigerator oil.
[0005] In order to achieve the above purpose, the utility model embodiment provides a guide oil return cover, which comprises a cover body, the cover body is a hollow cone structure with both ends open, the two ends of the cover body along the axial direction are respectively flange end and backflow end, the flange end is used for connecting with the inner wall of the casing of the compressor, the inner diameter of the backflow end is smaller than the inner diameter of the flange end, and the cover body is inclined from the flange end to the backflow end.
[0006] A plurality of gas guide portions are formed on the inner inclined surface of the cover body, and a gas guide hole is formed through the gas guide portion; a plurality of gas guide portions are respectively distributed in the circumferential direction, and the inner inclined surface of the cover body is connected with the backflow end.
[0007] Thus, according to the gas guide oil return cover of the embodiment of the utility model, the cover body adopts the design of the frustum, which is provided with the flange end with a large inner diameter, the flange end is used for abutting on the inner wall of the shell of the compressor to form the fixed connection, and the return end with a small inner diameter is used for the return collection of the refrigerant oil, specifically, a plurality of spaced gas guide parts are formed on the inner inclined surface of the cover body, and the gas guide holes for the refrigerant gas flow to pass through are arranged on the gas guide parts, so that the gas flow blown from the compression structure cannot be directly blown to the passage between the electric component and the shell, but the gas flow path is improved through the gas guide holes on the gas guide parts to reduce the oil return resistance of the refrigerant oil in the compressor; meanwhile, the oil return parts formed by the two adjacent gas guide parts and the inner inclined surface of the cover body can quickly recover the refrigerant oil above the cover body under the action of the inclined surface and return to the return end of the cover body through a plurality of oil return parts, and finally fall on the compression structure to improve the reliability of the compressor. That is, according to the gas guide oil return cover of the embodiment of the utility model, the gas flow path of the refrigerant can be effectively improved to reduce the oil return resistance of the refrigerant oil in the compressor, and meanwhile, the oil return passage of the refrigerant oil can be improved to improve the reliability of the compressor.
[0008] As an embodiment, the included angle formed between the oil return part and the inner wall of the shell of the compressor is β, and 5°≤β≤80°.
[0009] As an embodiment, the β satisfies the relationship: β=45°.
[0010] As an embodiment, the flange end protrudes in the axial direction of the cover body away from the return end, and the flange part is used for connecting with the inner wall of the shell of the compressor.
[0011] As an embodiment, the cover body is a hollow circular conical structure with both ends open, and a plurality of gas guide parts are equally spaced in the circumferential direction.
[0012] As an embodiment, one end of the gas guide part close to the return end is connected with the port edge of the return end.
[0013] As an embodiment, two gas guide holes are arranged on the gas guide part.
[0014] As an embodiment, the shape of the gas guide hole is one of a circle, an ellipse and a polygon.
[0015] The utility model discloses an embodiment second aspect provides a kind of compressor, including shell, built-in electric component on the inner wall of the shell and compression structure, further include the back oil cover of guide hydrogen as any one of the above embodiment, the electric component is located above the compression structure, and the electric component is used to drive the compression structure carries out compression operation;The back oil cover of guide hydrogen is arranged between the electric component and the compression structure, the inner wall of the flange end is connected with the shell, the back flow end is close to the compression structure arrangement, and the back flow end is spaced apart and arranged above the compression structure.The compressor of the utility model embodiment, by improving the air flow path of refrigerant to reduce the refrigeration oil back oil resistance in the compressor, simultaneously improve the back oil passage of refrigeration oil to improve the reliability of compressor.
[0016] For better understanding and implementation, the utility model is explained in detail below in conjunction with the drawings. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is structure schematic view one of the back oil cover of guide hydrogen of the utility model embodiment;
[0018] Figure 2 It is structure schematic view two of the back oil cover of guide hydrogen of the utility model embodiment;
[0019] Figure 3 It is structure schematic view three of the back oil cover of guide hydrogen of the utility model embodiment;
[0020] Figure 4 It is Figure 3 The cross section schematic view of A-A direction shown in;
[0021] Figure 5 It is connection schematic view one between the back oil cover of guide hydrogen and the shell of the compressor of the utility model embodiment;
[0022] Figure 6 It is structure schematic view four of the back oil cover of guide hydrogen of the utility model embodiment;
[0023] Figure 7 It is structure schematic view five of the back oil cover of guide hydrogen of the utility model embodiment;
[0024] Figure 8 It is structure schematic view six of the back oil cover of guide hydrogen of the utility model embodiment;
[0025] Figure 9 It is Figure 8 The cross section schematic view of B-B direction shown in;
[0026] Figure 10 It is connection schematic view two between the back oil cover of guide hydrogen and the shell of the compressor of the utility model embodiment;
[0027] Figure 11 Structure diagram of the compressor of the embodiment of the present application;
[0028] Figure 12 Sectional view diagram of the compressor of the embodiment of the present application.
[0029] Explanation of reference signs:
[0030] 10, cover body; 11, flange end; 12, return end; 13, air guide part; 14, air guide hole; 15, oil return part; 20, compressor; 21, shell; 22, electric component; 23, compression structure; 24, crankshaft. DETAILED DESCRIPTION
[0031] To further illustrate the embodiments, the present application provides drawings. These drawings are part of the disclosure of the present application, which mainly serve to illustrate the embodiments, and can be combined with the related description of the specification to explain the operating principle of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementations and the advantages of the present application.
[0032] In the related art, the rotary compressor generally includes a shell and a motor and a pump body structure coaxially arranged in the shell, the motor is arranged above the pump body structure and drives the pump body structure to compress refrigerant through a crankshaft, wherein the motor is usually composed of a stator and a rotor, the outer peripheral wall of the stator is fixedly connected with the inner peripheral wall of the shell, and the outer peripheral wall of the stator is partially recessed inward to form an oil return passage for the refrigeration oil to fall back. However, since there is no barrier between the pump body structure and the stator, when the pump body structure operates, the refrigerant gas discharged upward by the pump body structure is easy to blow directly into the oil return passage between the stator and the shell and cause the oil return passage to be blocked or closed, etc. Adverse phenomena, so that the refrigeration oil above the stator cannot smoothly fall back to the lower part of the shell through the oil return passage, resulting in the adverse phenomenon of oil shortage in the lower part of the shell, thereby affecting the operation of the pump body structure.
[0033] In view of this, the present application provides a guide oil return cover and a compressor, according to the guide oil return cover and the compressor of the present application, the air flow path of the refrigerant is improved to reduce the oil return resistance of the refrigeration oil in the compressor, and the oil return passage of the refrigeration oil is improved to improve the reliability of the compressor.
[0034] Please refer to Figures 1 to 10The utility model discloses a first aspect provides a kind of gas guide oil return cover, including cover body 10, cover body 10 is the conical frustum structure of inside hollow and both ends opening, the both ends of cover body 10 along its axial direction are respectively flange end 11 and backflow end 12, flange end 11 is used to with the shell 21 inner wall of compressor 20 is connected, the inner diameter of backflow end 12 is less than the inner diameter of flange end 11, cover body 10 from flange end 11 to backflow end 12 is inclined;Several gas guide parts 13 are formed on the inner inclined surface of cover body 10, and gas guide hole 14 is provided on the gas guide part 13;Several gas guide parts 13 are respectively distributed along the circumferential direction, and the inner inclined surface of cover body 10 is formed with the oil return part 15 of two adjacent gas guide parts 13, and the oil return part 15 is communicated with backflow end 12. Wherein, the end of gas guide part 13 close to backflow end 12 is connected with the port edge of backflow end 12.
[0035] Therefore, according to the gas guide oil return cover of the utility model embodiment, the cover body 10 adopts the design of conical frustum, which is provided with a flange end 11 with a large inner diameter, the flange end 11 is used to abut on the inner wall of the shell 21 of the compressor 20 to form a fixed connection, and the backflow end 12 with a small inner diameter is used for the backflow collection of refrigerant oil. Specifically, several spaced gas guide parts 13 are formed on the inner inclined surface of the cover body 10, and gas guide holes 14 for the refrigerant gas flow to pass through are provided on the gas guide parts 13. In this way, the gas flow blown out from the compression structure 23 will not be directly blown out to the passage between the electric member 22 and the shell 21, but will pass through the gas guide holes 14 on the gas guide parts 13 to improve the gas flow path, so as to reduce the oil return resistance of the refrigerant oil inside the compressor 20. At the same time, the oil return part 15 formed by the two adjacent gas guide parts 13 and the inner inclined surface of the cover body 10 can quickly recover the refrigerant oil above the cover body 10 and return to the backflow end 12 of the cover body 10 through the several oil return parts 15 under the action of the inclined surface, and finally fall on the compression structure 23, so as to improve the reliability of the compressor 20. That is, according to the gas guide oil return cover of the utility model embodiment, the gas flow path of the refrigerant can be effectively improved to reduce the oil return resistance of the refrigerant oil inside the compressor 20, and the oil return passage of the refrigerant oil can also be improved to improve the reliability of the compressor 20.
[0036] Specifically, in the embodiment of the utility model, the included angle between the oil return part 15 and the inner wall of the shell 21 of the compressor 20 is β, and 5°≤β≤80°. It can be understood that when the air guide oil return cover of the embodiment of the utility model is connected with the inner wall of the shell 21 of the compressor 20, it is located between the electric component 22 and the compression structure 23 of the compressor 20, and the return end 12 of the cover body 10 is arranged above the compression structure 23, so that the refrigerant oil is finally introduced into the compression structure 23 through the return end 12 after being collected by the cover body 10, and the return end 12 can also be used as a channel for the crankshaft 24 to pass through, so as to prevent the rotation of the crankshaft 24. In addition, by limiting the included angle β between the oil return part 15 and the inner wall of the shell 21 of the compressor 20 to 5°≤β≤80°, the design of the inclined angle can increase the flow guiding and collecting effect of the refrigerant oil, and the high-pressure gas discharged by the compression structure 23 will not hinder the refrigerant oil on the oil return part 15, so that the return efficiency of the refrigerant oil can be improved.
[0037] Optionally, in some embodiments of the utility model, the cover body 10 is a hollow conical frustum structure with both ends open, and a plurality of air guide parts 13 are distributed equidistantly along the circumferential direction. It can be understood that in these embodiments, the cover body 10 is a conical frustum structure with the upper part larger and the lower part smaller. By adopting this structure design, the high-speed gas blown by the compression structure 23 can be blocked by the outer side wall of the cover body 10, and the path of the gas can be improved through the air guide hole 14 of the air guide part 13, effectively avoiding the high-speed gas directly spraying on the oil passage between the electric component 22 and the shell 21 of the compressor 20, thereby greatly reducing the return resistance of the refrigerant oil.
[0038] Optionally, in some embodiments of the utility model, the flange end 11 protrudes in the axial direction of the cover body 10 away from the return end 12, and the flange part is used for connecting with the inner wall of the shell 21 of the compressor 20.
[0039] Optionally, in some embodiments of the utility model, the shape of the air guide hole 14 is one of circular, oval, and polygonal.
[0040] The specific embodiments of the air guide oil return cover according to the utility model are described in detail below, and it should be understood that the following is only illustrative and cannot be understood as a limitation of the utility model. Figures 1 to 5
[0041] As Figures 1 to 5 As shown, the air guide and oil return cover of this embodiment includes a cover body 10. The cover body 10 is a frustoconical structure with a hollow interior and open at both ends. The two ends of the cover body 10 along its axial direction are a flange end 11 and a return end 12, respectively. The flange end 11 is used to connect with the inner wall of the housing 21 of the compressor 20. The inner diameter of the return end 12 is smaller than the inner diameter of the flange end 11. The cover body 10 is inclined from the flange end 11 toward the return end 12. A plurality of air guide parts 13 are protruding on the inner inclined surface of the cover body 10, and air guide holes 14 are opened through the air guide parts 13. The plurality of air guide parts 13 are distributed at intervals along the circumferential direction. Two adjacent air guide parts 13 and the inner inclined surface of the cover body 10 together form an oil return part 15, which is connected to the return end 12. The end of the air guide part 13 near the return end 12 is connected to the port edge of the return end 12.
[0042] Specifically, in this embodiment, the included angle between the oil return section 15 and the inner wall of the housing 21 of the compressor 20 is β, where β = 45°. Furthermore, the cover 10 is a hollow, open-ended frustum-shaped structure, with several air guide sections 13 evenly spaced along the circumference. Each air guide section 13 has an elliptical air guide hole 14.
[0043] Furthermore, in this embodiment, the flange end 11 protrudes a flange portion along the axial direction of the cover 10 in a direction away from the return end 12, and the flange portion is used to connect with the inner wall of the housing 21 of the compressor 20.
[0044] The following is combined Figures 1 to 5 The following is a detailed description of a specific embodiment of the air guide and oil return cover according to the present invention. It is worth understanding that the following is only an illustrative description and should not be construed as a limitation of the present invention.
[0045] like Figures 1 to 5 As shown, the air guide and oil return cover of this embodiment includes a cover body 10. The cover body 10 is a frustoconical structure with a hollow interior and open at both ends. The two ends of the cover body 10 along its axial direction are a flange end 11 and a return end 12, respectively. The flange end 11 is used to connect with the inner wall of the housing 21 of the compressor 20. The inner diameter of the return end 12 is smaller than the inner diameter of the flange end 11. The cover body 10 is inclined from the flange end 11 toward the return end 12. A plurality of air guide parts 13 are protruding on the inner inclined surface of the cover body 10, and air guide holes 14 are opened through the air guide parts 13. The plurality of air guide parts 13 are distributed at intervals along the circumferential direction. Two adjacent air guide parts 13 and the inner inclined surface of the cover body 10 together form an oil return part 15, which is connected to the return end 12. The end of the air guide part 13 near the return end 12 is connected to the port edge of the return end 12.
[0046] Specifically, in the embodiment, the included angle between the oil return part 15 and the inner wall of the shell 21 of the compressor 20 is β, and β = 5°. In addition, the cover body 10 is a hollow conical frustum structure with both ends open, and a plurality of air guide parts 13 are distributed along the circumferential direction at equal intervals. Among them, the air guide part 13 is provided with an air guide hole 14, and the shape of the air guide hole 14 is oval.
[0047] Further, the flange end 11 of the embodiment protrudes in the axial direction of the cover body 10 away from the return end 12, and the flange part is used for connecting with the inner wall of the shell 21 of the compressor 20.
[0048] The specific embodiment of the oil return cover according to the utility model will be described in detail below, and it should be understood that the following is only a demonstrative description and cannot be understood as a limitation of the utility model. Figures 1 to 5 The specific embodiment of the oil return cover according to the utility model will be described in detail below, and it should be understood that the following is only a demonstrative description and cannot be understood as a limitation of the utility model.
[0049] As Figures 1 to 5 shown, the oil return cover of the embodiment includes a cover body 10, the cover body 10 is a hollow conical frustum structure with both ends open, the two ends of the cover body 10 in the axial direction are respectively a flange end 11 and a return end 12, the flange end 11 is used for connecting with the inner wall of the shell 21 of the compressor 20, the inner diameter of the return end 12 is smaller than that of the flange end 11, and the cover body 10 is inclined from the flange end 11 to the return end 12; a plurality of air guide parts 13 are protruded on the inner inclined surface of the cover body 10, and an air guide hole 14 is provided through the air guide part 13; a plurality of air guide parts 13 are distributed along the circumferential direction at equal intervals, and the two adjacent air guide parts 13 and the inner inclined surface of the cover body 10 jointly form an oil return part 15, and the oil return part 15 is communicated with the return end 12. Among them, the end of the air guide part 13 close to the return end 12 is connected with the port edge of the return end 12.
[0050] Specifically, in the embodiment, the included angle between the oil return part 15 and the inner wall of the shell 21 of the compressor 20 is β, and β = 5°. In addition, the cover body 10 is a hollow conical frustum structure with both ends open, and a plurality of air guide parts 13 are distributed along the circumferential direction at equal intervals. Among them, the air guide part 13 is provided with an air guide hole 14, and the shape of the air guide hole 14 is oval.
[0051] Further, the flange end 11 of the embodiment protrudes in the axial direction of the cover body 10 away from the return end 12, and the flange part is used for connecting with the inner wall of the shell 21 of the compressor 20.
[0052] The specific embodiment of the oil return cover according to the utility model will be described in detail below, and it should be understood that the following is only a demonstrative description and cannot be understood as a limitation of the utility model. Figures 6 to 10 The specific embodiment of the oil return cover according to the utility model will be described in detail below, and it should be understood that the following is only a demonstrative description and cannot be understood as a limitation of the utility model.
[0053] AsFigures 6 to 10 As shown in the drawings, the gas guide oil return cover of the embodiment comprises a cover body 10, the cover body 10 is a frustoconical structure with hollow inside and open at both ends, the two ends of the cover body 10 along the axial direction are respectively a flange end 11 and a return end 12, the flange end 11 is used for connecting with the inner wall of the shell 21 of the compressor 20, the inner diameter of the return end 12 is smaller than that of the flange end 11, and the cover body 10 is inclined from the flange end 11 to the return end 12; a plurality of gas guide parts 13 are formed on the inner inclined surface of the cover body 10 and protrude, gas guide holes 14 are provided through the gas guide parts 13; the plurality of gas guide parts 13 are distributed at intervals along the circumferential direction respectively, two adjacent gas guide parts 13 and the inner inclined surface of the cover body 10 jointly form an oil return part 15, and the oil return part 15 is communicated with the return end 12. Wherein, one end of the gas guide part 13 close to the return end 12 is connected with the edge of the port of the return end 12.
[0054] Specifically, in the embodiment, the included angle between the oil return part 15 and the inner wall of the shell 21 of the compressor 20 is β, and β = 45°. In addition, the cover body 10 is a circular frustoconical structure with hollow inside and open at both ends, and the plurality of gas guide parts 13 are distributed at equal intervals along the circumferential direction respectively. Wherein, two gas guide holes 14 with different sizes are provided on the gas guide part 13, and the shapes of the two gas guide holes 14 are both circular.
[0055] Further, the flange end 11 of the embodiment protrudes a flange part in the direction away from the return end 12 along the axial direction of the cover body 10, and the flange part is used for connecting with the inner wall of the shell 21 of the compressor 20.
[0056] As shown in the drawings, Figure 11 and Figure 12 The utility model embodiment second aspect provides a kind of compressor 20, comprising shell 21, built-in electric component 22 and compression structure 23 on the inner wall of shell 21, also include the gas guide oil return cover of any one of the above embodiment, electric component 22 is located above compression structure 23, and electric component 22 is used to drive compression structure 23 to carry out compression operation;Gas guide oil return cover is arranged between electric component 22 and compression structure 23, flange end 11 is connected with the inner wall of shell 21, return end 12 is close to compression structure 23 arrangement, and return end 12 is arranged at interval above compression structure 23. According to the compressor 20 of the utility model embodiment, the refrigerant airflow path is improved to reduce the refrigeration oil return resistance in the compressor 20, and the refrigeration oil return channel is improved to improve the reliability of the compressor 20.
[0057] In the description of the utility model, it is understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.
[0058] The above embodiments only express several embodiments of the utility model, the description is more specific and detailed, but it cannot be understood as limiting the scope of the utility model guide oil return cover and compressor. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model.
Claims
1.A guide gas return oil cover applied to a compressor, characterized in that: a cover body is provided, the cover body is a frustoconical structure with hollow inside and open at both ends, two ends of the cover body along the axial direction are respectively a flange end and a return end, the flange end is used to connect with the inner wall of the shell of the compressor, the inner diameter of the return end is smaller than that of the flange end, and the cover body is inclined from the flange end to the return end; a plurality of guide gas parts are formed on the inner inclined surface of the cover body, and a guide gas hole is formed through the guide gas part; the plurality of guide gas parts are respectively distributed in the circumferential direction at intervals, and two adjacent guide gas parts and the inner inclined surface of the cover body jointly form a return oil part, and the return oil part is connected with the return end. 2.The guide gas return oil cover according to claim 1, characterized in that: an included angle between the return oil part and the inner wall of the shell of the compressor is β, and 5°≤β≤80°. 3.The guide gas return oil cover according to claim 1, characterized in that: the β satisfies the relationship: β=45°. 4.The guide gas return oil cover according to claim 1, characterized in that: the flange end is provided with a flange part protruding away from the return end along the axial direction of the cover body, and the flange part is used to connect with the inner wall of the shell of the compressor. 5.The guide gas return oil cover according to claim 1, characterized in that: the cover body is a circular frustoconical structure with hollow inside and open at both ends, and the plurality of guide gas parts are respectively distributed in the circumferential direction at equal intervals. 6.The guide gas return oil cover according to claim 1, characterized in that: one end of the guide gas part close to the return end is connected with the port edge of the return end. 7.The guide gas return oil cover according to claim 1, characterized in that: two guide gas holes are formed through the guide gas part. 8.The guide gas return oil cover according to claim 1, characterized in that: the shape of the guide gas hole is one of circular, elliptical and polygonal. 9.A compressor, characterized in that: a shell, an electric component built in the inner wall of the shell and a compression structure are provided, and the guide gas return oil cover according to any one of claims 1 to 8 is further provided, the electric component is located above the compression structure, and the electric component is used to drive the compression structure to perform compression work; the guide gas return oil cover is arranged between the electric component and the compression structure, the flange end is connected with the inner wall of the shell, the return end is arranged close to the compression structure, and the return end is arranged above the compression structure at intervals.