Compressor and refrigeration equipment
By designing oil return holes in the top cover of the compressor, the oil in the high-pressure refrigerant is returned to oil, which solves the problem of adding oil return pipes and top cover processing during the oil-gas separation process in the prior art, achieving better oil-gas separation function and cost reduction.
Patent Information
- Application Number
- CN202421686537.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-07-16
AI Technical Summary
In the oil and gas separation process, existing compressors need to add oil return pipes and top cover processing, which increases cost and complexity, and has the risk of interference failure.
A compressor is designed, with an oil return hole formed in the top cover, whose aperture is smaller than the aperture of the exhaust passage, and the oil in the high-pressure refrigerant is returned to oil through the oil return hole to achieve oil and gas separation.
It realizes better oil and gas separation function, reduces the single-unit oil return pipe, top cover machining process and oil return pipe pressing and assembly process, and reduces the compressor cost.
Smart Images
Figure CN222879896U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of refrigeration systems, in particular to a compressor and refrigeration equipment. Background Art
[0002] The compressor is an important component of the air-conditioning system. The refrigeration oil in the electric compressor mainly plays the roles of lubrication, cleaning, sealing, heat dissipation, and rust prevention. The presence of refrigeration oil can greatly improve the reliability and stability of the scroll compressor. The refrigerant exists in the compressor in gaseous form, while the refrigeration oil exists in liquid form. The two have good mutual solubility. The refrigeration oil will flow with the flow of the refrigerant. The refrigerant is finally discharged from the high-pressure exhaust hole on the top cover, and the refrigeration oil will be discharged with the discharge of the refrigerant. In the long run, it will cause the compressor to lack oil. Long-term lack of oil in the compressor will lead to insufficient lubrication of the moving parts inside the compressor, resulting in accelerated wear of the compressor, greatly reducing the service life of the compressor, and finally damaging the compressor. Moreover, a large amount of refrigeration oil enters the air-conditioning system. Since the refrigeration oil cannot undergo gas-liquid two-phase change like the refrigerant, it is easy to clog various valve body components in the air-conditioning pipeline and reduce the stability of the air-conditioning system.
[0003] Existing compressors return oil by pressing an external oil return pipe into the top cover. This solution is to provide an exhaust channel on the top cover, open an exhaust hole above the exhaust channel, and press-fit an oil return pipe into the exhaust channel; the oil return pipe is used to separate oil and gas. The separated refrigerant oil passes through the oil return path and returns to the suction chamber through the filter, while the high-pressure refrigerant enters and is discharged outside the top cover through the oil return pipe. This design requires the addition of an oil return pipe to achieve the oil and gas separation function; to match the oil return pipe, the corresponding position of the top cover needs to be machined, increasing costs; a press-fitting process is required to press the oil return pipe into the top cover; if the interference fit between the oil return pipe and the top cover is excessive, the oil return pipe is at risk of failure due to interference fit. Utility Model Content
[0004] The purpose of this application is to provide a compressor and a refrigeration device.
[0005] The present application provides a compressor, comprising: a valve; a top cover, wherein the top cover is formed with an exhaust channel and an air inlet, the exhaust channel is arranged through, an exhaust hole and a sealing hole are respectively provided on both sides of the exhaust channel, the sealing hole is provided with the valve, the air inlet is provided on the side wall of the exhaust channel, the top cover is formed with an oil return hole in the exhaust channel, the aperture of the oil return hole is smaller than the aperture of the exhaust channel, and the oil return hole is provided on the side of the air inlet close to the exhaust hole.
[0006] In an exemplary embodiment of the present application, the diameter of the oil return hole gradually decreases from one side to the other side; or, the diameter of the oil return hole is the same from one side to the other side.
[0007] In an exemplary embodiment of the present application, one side of the oil return hole has a first aperture, and the other side of the oil return hole has a second aperture, the second aperture is smaller than the first aperture, the side of the oil return hole with the first aperture faces the sealing hole, and the side of the oil return hole with the second aperture faces the exhaust hole; or, the side of the oil return hole with the first aperture faces the exhaust hole, and the side of the oil return hole with the second aperture faces the sealing hole.
[0008] In an exemplary embodiment of the present application, the cross-section of the oil return hole is in the shape of a square, a semicircle, a trapezoid or a triangle.
[0009] In an exemplary embodiment of the present application, the oil return hole is formed with a draft hole, the aperture of the draft hole gradually decreases from one side to the other side, and the draft hole faces one side of the exhaust hole.
[0010] In an exemplary embodiment of the present application, the top cover is formed with an oil hole, the oil hole is provided on the side wall of the exhaust channel, the top cover is formed with an air suction cavity, and the exhaust channel is connected to the air suction cavity through the oil hole.
[0011] In an exemplary embodiment of the present application, the top cover is formed with an air suction cavity, the air suction cavity is connected to the exhaust channel through the air inlet, and the compressed gas enters the exhaust channel after being pressurized in the air suction cavity.
[0012] In an exemplary embodiment of the present application, the exhaust hole is extended to the outside of the top cover, and the exhaust hole is connected to an external pipeline to transport the gas refrigerant to the outside of the compressor.
[0013] In an exemplary embodiment of the present application, the exhaust channel is provided with a draft surface, which is provided between the exhaust hole and the oil return hole. The draft surface is an inclined surface or an arc surface, and the draft surface connects the oil return hole and the side wall of the exhaust hole.
[0014] The present invention relates to a compressor and refrigeration equipment having the following advantages: a valve is used to seal and relieve pressure in an exhaust passage; a top cover is formed with an exhaust passage and an air inlet; the exhaust passage is provided through the top cover, and an exhaust hole and a sealing hole are provided on either side of the exhaust passage, respectively; the sealing hole is provided with the valve; the air inlet is provided on the side wall of the exhaust passage; the top cover is formed with an oil return hole in the exhaust passage, the oil return hole having a smaller diameter than the exhaust passage, and the oil return hole is provided on a side of the air inlet near the exhaust hole. Thus, the air inlet provided on the side wall of the exhaust passage is used to allow oil to enter the exhaust passage, and the oil in the high-pressure refrigerant is returned through the oil return hole in the exhaust passage, so that the returned oil is retained in the exhaust passage. The high-pressure refrigerant enters the exhaust hole and is discharged outside the top cover, thereby achieving the oil-gas separation function. Compared with the prior art, the compressor can better achieve the oil-gas separation function, reduce the number of single oil return pipes, top cover machining steps, and oil return pipe press-fitting processes, and reduce the cost of the compressor.
[0015] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by practice of the present application.
[0016] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can derive other drawings based on these drawings without inventive effort.
[0018] Figure 1 This is a first cross-sectional schematic diagram of a top cover of a compressor according to an embodiment of the present utility model;
[0019] Figure 2 This is a second cross-sectional schematic diagram of a top cover of a compressor according to an embodiment of the present utility model;
[0020] Figure 3 yes Figure 1 A magnified schematic diagram of point A in the middle;
[0021] Figure 4 yes Figure 2 Enlarged schematic diagram of point B in the middle.
[0022] Description of reference numerals:
[0023] 10. Valve; 20. Top cover; 21. Exhaust channel; 211. Exhaust hole; 212. Sealing hole; 231. Draft surface; 22. Oil return hole; D1. First aperture; D2. Second aperture; 221. Draft hole; 23. Oil hole; 24. Suction cavity. DETAILED DESCRIPTION
[0024] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art.
[0025] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner.In the following description, many specific details are provided so as to provide a full understanding of the embodiments of the present application. However, it will be appreciated by those skilled in the art that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps etc. can be adopted. In other cases, known methods, devices, implementations or operations are not shown or described in detail to avoid blurring the various aspects of the application.
[0026] The present application is further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limiting the present application.
[0027] It should be noted that the term "plurality" used in this document refers to two or more. "And / or" describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A alone, A and B together, or B alone. The character " / " generally indicates an "or" relationship between the associated objects.
[0028] The compressor is an important component of the air-conditioning system. The refrigeration oil in the electric compressor mainly plays the roles of lubrication, cleaning, sealing, heat dissipation, and rust prevention. The presence of refrigeration oil can greatly improve the reliability and stability of the scroll compressor. The refrigerant exists in the compressor in gaseous form, while the refrigeration oil exists in liquid form. The two have good mutual solubility. The refrigeration oil will flow with the flow of the refrigerant. The refrigerant is finally discharged from the high-pressure exhaust hole on the top cover, and the refrigeration oil will be discharged with the discharge of the refrigerant. In the long run, it will cause the compressor to lack oil. Long-term lack of oil in the compressor will lead to insufficient lubrication of the moving parts inside the compressor, resulting in accelerated wear of the compressor, greatly reducing the service life of the compressor, and finally damaging the compressor. Moreover, a large amount of refrigeration oil enters the air-conditioning system. Since the refrigeration oil cannot undergo gas-liquid two-phase change like the refrigerant, it is easy to clog various valve body components in the air-conditioning pipeline and reduce the stability of the air-conditioning system.
[0029] Existing compressors return oil by pressing an external oil return pipe into the top cover. This solution is to provide an exhaust channel on the top cover, open an exhaust hole above the exhaust channel, and press-fit an oil return pipe into the exhaust channel; the oil return pipe is used to separate oil and gas. The separated refrigerant oil passes through the oil return path and returns to the suction chamber through the filter, while the high-pressure refrigerant enters and is discharged outside the top cover through the oil return pipe. This design requires the addition of an oil return pipe to achieve the oil and gas separation function; to match the oil return pipe, the corresponding position of the top cover needs to be machined, increasing costs; a press-fitting process is required to press the oil return pipe into the top cover; if the interference fit between the oil return pipe and the top cover is excessive, the oil return pipe is at risk of failure due to interference fit.
[0030] In order to solve the above technical problems, refer to Figure 1 and Figure 2As shown, the present application provides a device including a valve 10 and a top cover 20, the top cover 20 is formed with an exhaust channel 21 and an air inlet (not shown in the figure), the exhaust channel 21 is arranged through, and an exhaust hole 211 and a sealing hole 212 are respectively provided on both sides of the exhaust channel 21, the sealing hole 212 is provided with a valve 10, and the air inlet (not shown in the figure) is provided on the side wall of the exhaust channel 21, and the top cover 20 is formed with an oil return hole 22 in the exhaust channel 21, the aperture of the oil return hole 22 is smaller than the aperture of the exhaust channel 21, and the oil return hole 22 is provided on the side of the air inlet (not shown in the figure) close to the exhaust hole 211. Thus, valve 10 is used to seal exhaust channel 21 and relieve pressure in exhaust channel 21. An air inlet (not shown) provided on the side wall of exhaust channel 21 is used to allow oil to enter exhaust channel 21. Oil in the high-pressure refrigerant is returned through oil return hole 22 in exhaust channel 21, so that the returned oil is retained in exhaust channel 21. High-pressure refrigerant enters exhaust hole 211 and is discharged to the outside of top cover 20, thereby achieving the oil-gas separation function. Compared with the existing technology, the oil-gas separation function of the compressor can be better achieved, and the machining steps of the single oil return pipe and top cover 20 and the oil return pipe press-fitting process can be reduced, thereby reducing the cost of the compressor.
[0031] In some embodiments, reference Figure 1 and Figure 2 As shown, the top cover 20 is formed with an intake chamber 24, which is connected to the exhaust passage 21 through an air inlet (not shown). Compressed gas is pressurized in the intake chamber 24 and then enters the exhaust passage 21. The top cover 20 is formed with an oil hole 23, which is located on the side wall of the exhaust passage 21. The top cover 20 is formed with an intake chamber 24, which is connected to the exhaust passage 21 through the oil hole 23. The oil accumulated in the exhaust chamber through the oil return hole 22 will enter the intake chamber 24 through the oil hole 23. The intake chamber 24 is a cavity located between the static vortex and the orbiting vortex, which is used to temporarily store the high-pressure refrigerant compressed by the static vortex and the orbiting vortex. The refrigerant can be further pressurized in the intake chamber 24 and then flow into the exhaust passage 21. After the oil flows back through the oil hole 23 and enters the intake chamber 24, the orbiting vortex and the static vortex can reuse the refrigerant oil, thereby reducing the loss of refrigerant oil.
[0032] In some embodiments, reference Figure 1 and Figure 2 As shown, exhaust hole 211 extends outward from top cover 20 and communicates with an external pipeline to transport the refrigerant gas out of the compressor. Exhaust hole 211 can be connected to an external cooling pipeline. The portion extending outward from top cover 20 can be connected to the cooling pipeline. A flange can also be provided on the exhaust port to connect to the exhaust pipeline through the flange, making the connection of the exhaust pipeline more stable.
[0033] In some embodiments, the oil return hole 22 is pre-cast in the exhaust channel 21 of the top cover 20 through a die-casting process. During die-casting, a ejector pin needs to be inserted into the exhaust channel 21. When the ejector pin is removed, an integrated oil return channel and oil return hole 22 can be formed.
[0034] In some embodiments, reference Figure 3 As shown, the diameter of the oil return hole 22 gradually decreases from one side to the other side; or, referring to Figure 4 As shown, the diameter of the oil return hole 22 is the same from one side to the other. When die-casting the oil return hole 22, it is necessary to perform a drafting operation. Gradually reducing the diameter of the oil return hole 22 from one side to the other is called an inclined drafting operation, while maintaining the same diameter from one side to the other is called a straight drafting operation. Inclined drafting makes it easier to draft, while straight drafting allows for a more regular oil return hole 22.
[0035] In some embodiments, reference Figure 3 As shown, when the aperture of the oil return hole 22 gradually decreases from one side to the other side, one side of the oil return hole 22 has a first aperture D1, and the other side of the oil return hole 22 has a second aperture D2, the second aperture D2 is smaller than the first aperture D1, the side of the oil return hole 22 with the first aperture D1 faces the sealing hole 212, and the side of the oil return hole 22 with the second aperture D2 faces the exhaust hole 211; or, referring to Figure 4 As shown, the side of the oil return hole 22 with the first aperture D1 faces the exhaust hole 211, and the side of the oil return hole 22 with the second aperture D2 faces the sealing hole 212. That is, the side of the oil return hole 22 with the first aperture D1 can face both the sealing hole 212 and the exhaust hole 211. The choice is not specifically limited here, as long as it can achieve a good oil return effect.
[0036] In some embodiments, the cross-section of the oil return hole 22 is square, semicircular, trapezoidal, or triangular. When the diameter of the oil return hole 22 decreases from one side to the other, the cross-section of the oil return hole 22 may be semicircular, trapezoidal, or triangular. When the diameter of the oil return hole 22 remains the same from one side to the other, the cross-section of the oil return hole 22 may be square.
[0037] In some embodiments, reference Figure 3 and Figure 4 As shown, the oil return hole 22 is formed with a draft hole 221, the diameter of which gradually decreases from one side to the other, and the draft hole 221 faces the side of the vent hole 211. The draft hole 221 can be provided on either side of the oil return hole 22 facing the sealing hole 212 or the vent hole 211, or it can be provided on both sides facing the sealing hole 212 and the vent hole 211, thereby facilitating pin insertion and drafting.
[0038] In some embodiments, reference Figure 3 and Figure 4 As shown, the exhaust channel 21 is provided with a draft surface 231, which is located between the exhaust hole 211 and the oil return hole 22. The draft surface 231 is an inclined surface or an arc-shaped surface, and the draft surface 231 connects the side walls of the oil return hole 22 and the exhaust hole 211. The draft surface 231 formed by connecting the arc surface and the inclined surface on the connecting surface of the two holes can further facilitate demolding and prevent the ejector pin from breaking during demolding.
[0039] The present application also provides a refrigeration device, including a compressor, which returns the oil in the high-pressure refrigerant through the oil return hole 22 in the exhaust channel 21, so that the returned oil is retained in the exhaust channel 21, and the high-pressure refrigerant is discharged to the outside of the top cover 20 through the exhaust hole 211, thereby realizing the oil-gas separation function. The oil return hole 22 is pre-cast in the exhaust channel 21 of the top cover 20 through a die-casting process. The aperture of the oil return hole 22 is set to gradually decrease from one side to the other side or to be the same from one side to the other side, which can be more convenient for demolding. Direct demolding can form a more regular oil return hole 22. Compared with the existing technology, the compressor of the present application can better realize the oil-gas separation function, and can reduce the machining process of the single oil return pipe, the top cover 20 and the return oil pipe pressing process, thereby reducing the cost of the compressor.
[0040] In this application, unless otherwise specified or limited, the terms "disposed (provided with)" and "connected" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two elements, or interaction between two elements. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.
[0041] In the description of this specification, the description of reference terms such as "some embodiments" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment are included in at least one embodiment of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.
[0042] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application. Therefore, any changes or modifications made in accordance with the claims and description of the present application should fall within the scope of the patent application.
Claims
1. A compressor, characterized in that: include: valve; A top cover is formed with an exhaust channel and an air inlet, the exhaust channel is set through, an exhaust hole and a sealing hole are respectively provided on both sides of the exhaust channel, the sealing hole is provided with the valve, the air inlet is arranged on the side wall of the exhaust channel, the top cover is formed with an oil return hole in the exhaust channel, the aperture of the oil return hole is smaller than the aperture of the exhaust channel, and the oil return hole is arranged on a side of the air inlet close to the exhaust hole.
2. The compressor according to claim 1, characterized in that The diameter of the oil return hole gradually decreases from one side to the other side; or, the diameter of the oil return hole is the same from one side to the other side.
3. The compressor according to claim 2, characterized in that One side of the oil return hole has a first aperture, and the other side of the oil return hole has a second aperture, the second aperture is smaller than the first aperture, the side of the oil return hole with the first aperture faces the sealing hole, and the side of the oil return hole with the second aperture faces the exhaust hole; or, the side of the oil return hole with the first aperture faces the exhaust hole, and the side of the oil return hole with the second aperture faces the sealing hole.
4. The compressor according to claim 3, characterized in that The cross-section of the oil return hole is in the shape of a square, a semicircle, a trapezoid or a triangle.
5. The compressor according to claim 3, characterized in that The oil return hole is formed with a draft hole, the diameter of the draft hole gradually decreases from one side to the other side, and the draft hole faces one side of the exhaust hole.
6. The compressor according to claim 1, characterized in that The top cover is formed with an oil hole, the oil hole is arranged on the side wall of the exhaust passage, the top cover is formed with an air suction cavity, and the exhaust passage is connected with the air suction cavity through the oil hole.
7. The compressor according to claim 1, characterized in that The top cover is formed with an air suction cavity, which is connected to the exhaust channel through the air inlet, and the compressed gas enters the exhaust channel after being pressurized in the air suction cavity.
8. The compressor according to claim 1, characterized in that The exhaust hole is extended to the outside of the top cover, and the exhaust hole is connected to an external pipeline to transport the gas refrigerant to the outside of the compressor.
9. The compressor according to claim 1, characterized in that The exhaust channel is provided with a draft surface, the draft surface is provided between the exhaust hole and the oil return hole, the draft surface is an inclined surface or an arc surface, and the draft surface connects the oil return hole and the side wall of the exhaust hole.
10. A refrigeration device, characterized in that: A compressor comprising the compressor according to any one of claims 1 to 9.