Upper cover for scroll compressor of air conditioner

Abstract

The upper cover comprises an annular partition plate, a channel hole, a first baffle, an exhaust hole and an outer shell, when a high-temperature and high-pressure oil-gas mixture enters a first high-pressure cavity, large oil drops collide with the baffle due to the inertia effect and flow back to an oil cavity, dependence on a high-precision oil branch pipe is cancelled, and the oil-gas mixture is prevented from entering the first high-pressure cavity. Therefore, the manufacturing process is greatly simplified, the overall production cost is reduced, and meanwhile the assembly efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of air-conditioning scroll compressors, and in particular to an upper cover for an air-conditioning scroll compressor. Background Art

[0002] With the rapid development of new energy vehicles, the structure of air-conditioning scroll compressors for electric vehicles has gradually matured. During the operation of the compressor, the exhaust gas often contains a high proportion of refrigerant oil. The main function of refrigerant oil is to lubricate the moving parts inside the compressor and improve the compression efficiency. If too much refrigerant oil is taken away in the exhaust gas, it will affect the performance of the refrigeration system, especially reducing the heat exchange efficiency of the evaporator and condenser. In severe cases, insufficient refrigerant oil in the compressor may also cause wear of internal components and damage to the compressor. Therefore, an oil-gas separation structure is required in the internal structure of the compressor to ensure that most of the refrigerant oil circulates inside the compressor and the gas is discharged outside the compressor.

[0003] In the prior art, oil-gas separation is mainly achieved through the processing of the upper cover and the installation of the oil pipe: the high-temperature and high-pressure oil-gas mixture passes through the slender oil pipe when discharged from the compressor, collides with the wall of the oil pipe and flows along a spiral trajectory, and the centrifugal force generated by the rotation separates the refrigerant oil from the gas. Larger particles of oil droplets will flow back to the oil cavity at the bottom of the exhaust cavity, while the high-temperature and high-pressure gaseous refrigerant will be discharged from the compressor.

[0004] However, the current air-conditioning scroll compressor has a complicated manufacturing process for the upper cover, and the oil pipe has high precision requirements, which increases the difficulty of manufacturing and assembly, and the overall structural design is complex, resulting in an increase in production costs. In addition, although the oil pipe has a significant effect on separating larger oil droplets, it has a low separation efficiency for oil mist with smaller particle sizes, resulting in part of the refrigerant oil still being discharged from the compressor with the gas, affecting system performance. In other words, the current air-conditioning scroll compressor upper cover has technical problems such as high production cost, low assembly efficiency, and low oil-gas separation effect. Summary of the invention

[0005] Based on this, it is necessary to provide a top cover for an air-conditioning scroll compressor in response to the above technical problems.

[0006] In order to achieve the above objectives, the embodiments of the present invention adopt the following technical solutions: Provided is an upper cover for an air-conditioning scroll compressor, comprising: An annular partition, when the annular partition is covered with the stator disk of the air-conditioning scroll compressor, divides the space of the upper cover into a first high-pressure chamber and a second high-pressure chamber; A channel hole, which is arranged on the annular partition plate and is used to achieve communication between the first high-pressure chamber and the second high-pressure chamber; A first baffle, one end of each of the first baffles is connected to the center of the first high-pressure chamber, and the other end of each of the first baffles is connected to the inner wall of the annular partition; the height of each of the first baffles is lower than the annular partition; The exhaust hole is arranged on the outer shell of the upper cover and is used to exhaust the gas in the second high-pressure chamber.

[0007] In one embodiment, it also includes: The second baffles, one end of each of the second baffles is connected to the outer wall of the annular partition, and the other end of each of the second baffles is connected to the inner wall of the outer shell; the height of each of the second baffles is lower than the annular partition.

[0008] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: The upper cover for the air-conditioning scroll compressor is designed by optimizing the upper cover structure, including an annular partition, a channel hole, a first baffle, an exhaust hole and an outer shell. When the high-temperature and high-pressure oil-gas mixture enters the first high-pressure chamber, the larger oil droplets collide with the baffle due to inertia and flow back to the oil chamber, eliminating the reliance on high-precision oil distribution pipes, thereby greatly simplifying the manufacturing process, reducing the overall production cost, and improving assembly efficiency. In addition, the second baffle set in the second high-pressure chamber allows smaller oil mist to gather into larger oil droplets and then be captured during multiple turns of the airflow, further enhancing the oil-gas separation effect, especially the separation ability of small particle oil mist is greatly improved, reducing the content of refrigerant oil discharged with the gas, ensuring the lubrication of the internal moving parts of the compressor, and extending the service life of the compressor; reducing the amount of refrigerant oil entering the evaporator and condenser, improving the heat exchange efficiency of the air-conditioning system, and ultimately improving the refrigeration performance and energy efficiency of the air-conditioning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0010] Figure 1 A partial cross-sectional schematic diagram of an air-conditioning scroll compressor in one embodiment; Figure 2 A schematic diagram of an upper cover for an air-conditioning scroll compressor in one embodiment; Figure 3 A partial cross-sectional schematic diagram of an air-conditioning scroll compressor in another embodiment; Figure 4 A schematic diagram of an upper cover for an air-conditioning scroll compressor in another embodiment; Figure 5 Schematic diagram of the airflow path of the upper cover of the air-conditioning scroll compressor in another embodiment.

[0011] 1-moving disc; 2-motor housing; 3-static plate, 301-exhaust port, 302-annular support; 4-upper cover, 401-annular baffle, 402-channel hole, 403-first baffle, 404-exhaust hole, 405-outer shell, 406-second baffle; 5-exhaust valve plate; 6-first high-pressure chamber; 7-second high-pressure chamber. DETAILED DESCRIPTION

[0012] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0013] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0014] The following will describe the implementation of the present invention in detail with reference to the accompanying drawings in the embodiment diagram of the present invention.

[0015] In one embodiment, a partial cross-sectional schematic diagram of an air-conditioning scroll compressor is shown in FIG. Figure 1 As shown, the compressor includes: a moving plate 1, a motor housing 2, a stationary plate 3, an upper cover 4 provided in the present application, and an exhaust valve plate 5. Specifically, the upper cover schematic diagram of the air conditioner scroll compressor of this embodiment is as follows Figure 2 An annular support 302 may be designed on the stator plate 3 to cooperate with the annular partition 401 of the upper cover 4 so as to divide the space of the upper cover 4 into a first high-pressure chamber 6 and a second high-pressure chamber 7 .

[0016] The upper cover 4 specifically includes: Annular baffle 401, channel hole 402, first baffle 403, exhaust hole 404 and outer shell 405. When the annular baffle 401 is covered with the stator 3 of the air-conditioning scroll compressor, the space of the upper cover 4 is divided into a first high-pressure chamber 6 and a second high-pressure chamber 7; the channel hole 402 is arranged on the annular baffle 401, and is used to achieve the connection between the first high-pressure chamber 6 and the second high-pressure chamber 7; one end of a plurality of first baffles 403 is connected to the center of the first high-pressure chamber 6, and the other end of each first baffle 403 is connected to the inner wall of the annular baffle 401; the height of each first baffle 403 is lower than the annular baffle 401; the exhaust hole 404 is arranged on the outer shell 405 of the upper cover 4, and is used to discharge the gas in the second high-pressure chamber 7.

[0017] Among them, the annular partition 401 can be in the shape of a circular ring, a rectangular ring, a polygonal ring or other irregular ring shapes, as long as the annular partition 401 can divide the space of the upper cover 4 into two spaces inside and outside the ring when the upper cover 4 is closed; the shape of the annular support 302 corresponds to the annular partition 401. The channel hole 402 is arranged on the annular partition 401, and can be specifically arranged on the side close to the static disk 3 in the shape of a notch, or can be arranged in the middle of the annular partition 401 in the shape of a circular through hole, as long as the connection between the first high-pressure chamber 6 and the second high-pressure chamber 7 can be achieved. Textures can be set on the inner walls of the first baffle 403 and the annular partition 401 or the surface roughness can be adjusted, and guide grooves can also be set on them. The first baffle 403 can be a trapezoidal baffle, a triangular baffle, other polygonal baffles or an irregular baffle. The number of channel holes 402 can be set to 1, 2 or more, the number of first baffles 403 can be set to 6, the compressor with a smaller diameter can also be set to 2, 3, 4 or 5, and the compressor with a larger diameter can be set to 7, 8, 9 or more baffles.

[0018] It can be understood that the compression component of the scroll compressor is composed of a movable scroll disk (i.e., the movable disk 1) and a fixed scroll disk (i.e., the fixed disk 3). When working, the movable disk 1 and the fixed disk 3 compress the refrigerant gas into a high-temperature and high-pressure gas during the meshing process. Since there is lubricating oil between the movable disk 1 and the fixed disk 3 of the compressor, the lubricating oil will be brought into the gas during the compression process to form a high-temperature and high-pressure oil-gas mixture. When the compressor discharges the high-temperature and high-pressure oil-gas mixture, it first enters the first high-pressure chamber 6 of the upper cover 4 from the exhaust port 301 on the back of the fixed disk 3. Due to the inertia, the larger particle oil droplets cannot immediately turn with the airflow, so they collide with the first baffle 403. After the large particle oil droplets hit the first baffle 403, they adhere to the surface of the first baffle 403 and flow into the oil chamber at the bottom along the first baffle 403 under the action of gravity. The refrigeration oil enters the internal circulation of the compressor again, and the remaining gas flows into the second high-pressure chamber 7 through the channel hole 402. The texture can be set on the wall of the second high-pressure chamber 7 or the surface roughness can be adjusted, and a guide groove can also be set on it. The gas is discharged from the compressor through the exhaust port 404 after circulating in the high pressure chamber.

[0019] The upper cover 4 for the air-conditioning scroll compressor is optimized in structure and includes an annular partition plate 401, a channel hole 402, a first baffle plate 403, an exhaust hole 404 and an outer shell 405. When the high-temperature and high-pressure oil-gas mixture enters the first high-pressure chamber 6, larger oil droplets collide with the baffle plate due to inertia and flow back to the oil chamber, eliminating the reliance on high-precision oil distribution pipes, thereby greatly simplifying the manufacturing process, reducing the overall production cost, and improving assembly efficiency.

[0020] In another embodiment, a partial cross-sectional schematic diagram of an air-conditioning scroll compressor is shown in FIG. Figure 3 As shown, the schematic diagram of the upper cover for the air conditioner scroll compressor of this embodiment is as shown in Figure 4 As shown, the design of the upper cover 4 also includes: a second baffle 406, one end of several second baffles 406 is connected to the outer wall of the annular partition 401, and the other end of each second baffle 406 is connected to the inner wall of the outer shell 405; the height of each second baffle 406 is lower than the annular partition 401.

[0021] Among them, the first baffle 403 and the second baffle 406 can be arranged on both sides of the inner and outer walls of the annular partition 401 in a one-to-one correspondence, or can be arranged on both sides of the inner and outer walls of the annular partition 401 in a staggered or irregular manner. Textures can be set on the second baffle 406, the inner and outer walls of the annular partition 401, and the inner wall of the outer shell 405, and guide grooves can be set on the second baffle 406, the inner and outer walls of the annular partition 401, and the inner wall of the outer shell 405. The second baffle 406 can be a trapezoidal baffle, a triangular baffle, other polygonal baffles, or an irregular baffle. The number of the second baffles 406 can be set to 6, and the compressor with a smaller diameter can also be set to 2, 3, 4 or 5. The compressor with a larger diameter can be set to 7, 8, 9 or more baffles, which can be the same as the number of the first baffle 403, or different from the number of the first baffle 403.

[0022] It can be understood that in this embodiment, a second baffle 406 is additionally designed in the second high-pressure chamber 7. During operation, after the oil-gas mixture passes through the first baffle 403 in the first high-pressure chamber 6 for oil-gas separation, there are still smaller particles of oil mist mixed in the gas. Because of its smaller momentum, it cannot be captured by the first baffle 403 and flows into the second high-pressure chamber 7 through the channel hole 402. Specifically, the airflow path diagram of the upper cover 4 of the air conditioner scroll compressor is as follows: Figure 5 As shown, Figure 5 for Figure 3 In the AA cross-sectional view of the middle upper cover 4, after the oil mist-containing airflow flows into the second high-pressure chamber 7, it makes multiple turns in multiple spaces formed by the annular partition 401, the second baffle 406 and the outer shell 405. After multiple turns, it gradually gathers to form larger oil droplets, which are finally captured by the second baffle 406 and flow into the bottom oil pool under the action of gravity. The remaining gas is discharged from the compressor from the exhaust hole 404.

[0023] The above-mentioned upper cover 4 for the air-conditioning scroll compressor and the second baffle 406 set in the second high-pressure chamber 7 enable smaller oil mist to gather into larger oil droplets and then be captured during multiple turns of the air flow, further enhancing the oil-gas separation effect, especially the separation ability of small particle oil mist is greatly improved, reducing the content of refrigerant oil discharged with the gas, ensuring the lubrication of the moving parts inside the compressor, and extending the service life of the compressor; reducing the amount of refrigerant oil entering the evaporator and condenser, improving the heat exchange efficiency of the air-conditioning system, and ultimately improving the refrigeration performance and energy efficiency of the air-conditioning system.

[0024] In one embodiment, for the upper cover 4 of the air-conditioning scroll compressor, the annular partition 401 is in the shape of a circular ring.

[0025] It can be understood that the annular partition 401 is designed to be in a circular ring shape, which can promote the gas to flow along a uniform annular channel, reduce turbulence and backflow during the flow process, and thus reduce energy loss.

[0026] In one embodiment, for the upper cover 4 of the air-conditioning scroll compressor, the channel hole 402 is arranged on a side close to the stator plate 3 and is in a notch shape.

[0027] It can be understood that the notch-shaped design is easy to process and manufacture, especially in a smaller thickness, it can achieve more accurate hole opening, reducing the difficulty of precision round hole punching. In addition, the processing of the notch shape can effectively reduce the processing time and improve production efficiency, thereby reducing production costs.

[0028] In one embodiment, for the upper cover 4 of the air-conditioning scroll compressor, the first baffle 403 and the second baffle 406 are arranged on both sides of the inner and outer walls of the annular partition 401 in a one-to-one correspondence.

[0029] It can be understood that the first baffle 403 and the second baffle 406 are arranged one by one on both sides of the inner and outer walls of the annular partition 401, which can improve the symmetry and balance of the structure, thereby enhancing the stability of the overall structure. In addition, this corresponding design is easy to process and assemble, which can reduce the overall cost and improve the assembly efficiency.

[0030] In one embodiment, the first baffle 403 , the second baffle 406 , the inner and outer walls of the annular partition 401 , and the inner wall of the outer shell 405 are all provided with textures.

[0031] It can be understood that the textured surface can increase the contact area with the oil, making the oil easier to adhere, and can also increase the surface roughness, so that the oil droplets can be better captured, further enhancing the oil-gas separation effect.

[0032] In one embodiment, the first baffle 403 , the second baffle 406 , the inner and outer walls of the annular partition 401 , and the inner wall of the outer shell 405 are also provided with guide grooves.

[0033] It can be understood that the oil flow path can be guided, turbulence can be effectively reduced, and the separation of gas and oil can be promoted. This design can optimize the oil return path, avoid oil accumulation in the high-pressure chamber, improve the lubrication effect and reduce oil loss, thereby improving the performance and efficiency of the compressor.

[0034] In one embodiment, the first baffle 403 is a trapezoidal baffle, and the second baffle 406 is a rectangular baffle.

[0035] It can be understood that the first baffle 403 is designed as a rectangular structure, which can not only provide a more stable support structure in terms of mechanical properties, but also better withstand and disperse the pressure brought by the oil and gas mixture rushing out of the exhaust port 301; the second baffle 406 is a rectangular baffle, which is arranged between the annular partition 401 and the outer shell 405, and can provide balanced and uniform support to ensure the stability and durability of the overall structure.

[0036] In one embodiment, the number of the channel holes 402 is 2, the number of the first baffles 403 is 6, and the number of the second baffles 406 is also 6.

[0037] It can be understood that the channel holes 402 are set to 2, which can achieve uniform airflow distribution in fluid mechanics, thereby ensuring the stability of gas flow in the high-pressure chamber. The first baffle 403 and the second baffle 406 are set to 6 each. More baffles can improve the oil capture ability, improve the oil-gas separation effect, and also help to improve the overall stability of the upper cover 4 structure. However, too many baffles will increase the processing complexity and cost, and may affect the smooth flow of air, so the number of baffles can be set specifically according to the size of the compressor diameter, so as to achieve a balance between the oil capture effect, structural stability and processing difficulty.

[0038] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cover for an air-conditioning scroll compressor, characterized in that: include: an annular partition, which, when combined with the stator disk of the air-conditioning scroll compressor, divides the space of the upper cover into a first high-pressure chamber and a second high-pressure chamber; a channel hole, the channel hole being arranged on the annular partition plate and being used to realize the communication between the first high-pressure chamber and the second high-pressure chamber; A first baffle, wherein one end of a plurality of the first baffles is connected to the center of the first high-pressure chamber, and the other end of each of the first baffles is connected to the inner wall of the annular partition; and the height of each of the first baffles is lower than the annular partition; An exhaust hole is provided on the outer shell of the upper cover and is used to exhaust the gas in the second high-pressure chamber.

2. The upper cover for an air-conditioning scroll compressor according to claim 1, characterized in that: Also includes: A second baffle, one end of a plurality of the second baffles is connected to the outer wall of the annular partition, and the other end of each of the second baffles is connected to the inner wall of the outer shell; the height of each of the second baffles is lower than the annular partition.

3. The upper cover for an air-conditioning scroll compressor according to claim 2, characterized in that: The annular partition is in the shape of a circular ring.

4. The upper cover for an air-conditioning scroll compressor according to claim 2 or 3, characterized in that: The channel hole is arranged at a side close to the static disk and is in a notch shape.

5. The upper cover for an air-conditioning scroll compressor according to claim 4, characterized in that: The first baffle plate and the second baffle plate are arranged on both sides of the inner and outer walls of the annular partition plate in a one-to-one correspondence.

6. The upper cover for an air-conditioning scroll compressor according to claim 5, characterized in that: The first baffle plate, the second baffle plate, the inner and outer walls of the annular partition plate and the inner wall of the outer shell are all provided with textures.

7. The upper cover for an air-conditioning scroll compressor according to claim 6, characterized in that: The first baffle plate, the second baffle plate, the inner and outer walls of the annular partition plate and the inner wall of the outer shell are also provided with guide grooves.

8. The upper cover for an air-conditioning scroll compressor according to claim 1 or 2, characterized in that: The first baffle is a trapezoidal baffle, and the second baffle is a rectangular baffle.

9. The upper cover for an air-conditioning scroll compressor according to claim 1 or 2, characterized in that: The number of the channel holes is 2, the number of the first baffles is 6, and the number of the second baffles is also 6.

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