Scroll assembly, scroll compressor and vehicle air conditioning system

Abstract

The present application provides a scroll assembly, a scroll compressor and a vehicle air-conditioning system, which relate to the field of compressors. The scroll assembly includes a movable scroll body, a first stationary scroll body and a second stationary scroll body. The movable scroll body is provided with a first movable scroll structure and a second movable scroll structure on both sides of the axis extension direction thereof; the first stationary scroll body is provided with a first stationary scroll structure, and the second stationary scroll body is provided with a second stationary scroll structure; the movable scroll body is provided between the first stationary scroll body and the second stationary scroll body, and the first movable scroll structure cooperates with the first stationary scroll structure to jointly define a first compression chamber; the second movable scroll structure cooperates with the second stationary scroll structure to jointly define a second compression chamber. The movable scroll body is subjected to balanced forces on both sides of the axial direction, and axial movement is not likely to occur, so that the compressor operates stably and reliably.

Description

Technical Field

[0001] The present invention relates to the field of compressors, and in particular to a scroll assembly, a scroll compressor and a vehicle air-conditioning system. Background Art

[0002] In the prior art, the compressor is divided into four areas: low-pressure chamber, back-pressure chamber, compression chamber, and high-pressure chamber, according to the different pressure values ​​in each area of ​​the compressor when the compressor is working. When the compressor is working, the motor drives the movable scroll assembly to make a circular translation, and the volume of the closed compression chamber between the movable scroll assembly and the static scroll assembly gradually decreases. The low-temperature and low-pressure refrigerant entering the compression chamber from the low-pressure chamber is compressed into a high-temperature and high-pressure refrigerant; when the pressure of the compressed refrigerant reaches a certain level, it will be discharged to the high-pressure chamber through the exhaust hole on the static scroll assembly, and finally discharged into the air-conditioning system, thus realizing the function of the compressor compressing the refrigerant and using it in the air-conditioning system. When the compressor is working, the movable scroll assembly is subjected to a large gas force in the axial direction. This force will cause the movable scroll assembly and the fixed scroll assembly to separate and fit axially at the end surface of the profile, resulting in axial leakage of the refrigerant in the compression working chamber. To avoid this problem, a back pressure chamber is usually provided on the back side of the movable scroll assembly in the compressor to provide a reverse axial force (i.e., back pressure) so that the movable scroll assembly and the fixed scroll assembly are in a fit state at the end surface of the profile during the operation of the compressor.

[0003] The inventor has found that the existing compressor has the following disadvantages:

[0004] The pressure in the back-pressure chamber is difficult to control, the axial force of the movable scroll assembly is unbalanced, and the compressor performance is poor. Summary of the invention

[0005] The object of the present invention is to provide a scroll assembly, a scroll compressor and a vehicle air-conditioning system, which can effectively balance the pressure of the movable scroll assembly in its axial direction, so that the movable scroll assembly runs smoothly and the compressor performance is stable.

[0006] The embodiment of the present invention is achieved as follows:

[0007] In a first aspect, the present invention provides a scroll assembly, comprising:

[0008] A movable scroll body, a first static scroll body and a second static scroll body, wherein the movable scroll body is respectively provided with a first movable scroll structure and a second movable scroll structure on both sides of the axial extension direction of the movable scroll body; the first static scroll body is provided with a first static scroll structure, and the second static scroll body is provided with a second static scroll structure; the movable scroll body is arranged between the first static scroll body and the second static scroll body, and the first movable scroll structure cooperates with the first static scroll structure to jointly define a first compression chamber; the second movable scroll structure cooperates with the second static scroll structure to jointly define a second compression chamber.

[0009] In an optional embodiment, the first movable scroll structure and the second movable scroll structure are arranged in mirror symmetry.

[0010] In an optional embodiment, the first compression chamber is connected to the second compression chamber.

[0011] In an optional embodiment, a connecting hole is provided on the movable scroll body, and the first compression chamber and the second compression chamber are connected through the connecting hole.

[0012] In an optional embodiment, there are multiple connecting holes, and the first static vortex body or the second static vortex body is provided with multiple exhaust holes equal to the number of the connecting holes, and the multiple connecting holes correspond one-to-one to the multiple exhaust holes respectively.

[0013] In an optional embodiment, the first stationary scroll body is fixedly connected to the second stationary scroll body, and the two are relatively fixed in the extension direction of the axis of the movable scroll body.

[0014] In an optional embodiment, the movable scroll body is relatively fixed to the first fixed scroll body and the second fixed scroll body in the extension direction of the axis of the movable scroll body.

[0015] In an optional embodiment, the scroll assembly further includes a driving mechanism, which is connected to the movable scroll body and is used to drive the movable scroll body to perform circular translation relative to the first fixed scroll body and the second fixed scroll body simultaneously.

[0016] In a second aspect, the present invention provides a scroll compressor, comprising:

[0017] A scroll assembly as described in any one of the preceding embodiments.

[0018] In a third aspect, the present invention provides a vehicle air conditioning system, the vehicle air conditioning system comprising:

[0019] The scroll compressor described in the above embodiment.

[0020] The beneficial effects of the embodiments of the present invention are:

[0021] To summarize, the scroll assembly provided in the present embodiment is provided with a first static scroll body and a second static scroll body on both sides of the movable scroll body, so that the first static scroll body and the movable scroll body can define a first compression chamber, and the second static scroll body and the movable scroll body can define a second compression chamber. During operation, the refrigerant to be compressed is simultaneously introduced into the low-pressure areas of the first compression chamber and the second compression chamber for synchronous compression. In this way, the pressures on both sides of the movable scroll body in the axial direction are basically equal, thus achieving dynamic balance, and there is no pressure difference in the axial direction of the movable scroll body. The movable scroll body is not easy to jump in the axial direction, which effectively improves the problem in the prior art that the friction power loss is large due to the tight fit between the movable scroll body and the static scroll body, or the axial leakage loss of the compression chamber refrigerant is increased due to the loose fit between the two. At the same time, the movable scroll body is not easy to produce axial jumping, which greatly improves the noise and vibration problems during the operation of the compressor, and the compressor has stable performance, long service life and low operating cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a structural schematic diagram of a scroll assembly according to an embodiment of the present invention;

[0024] Figure 2 is a schematic cross-sectional structural diagram of a scroll assembly according to an embodiment of the present invention;

[0025] Figure 3 A structural schematic diagram of a movable scroll body from one perspective of an embodiment of the present invention;

[0026] Figure 4 A schematic structural diagram of a movable scroll body from another perspective of an embodiment of the present invention;

[0027] Figure 5 It is a schematic structural diagram of a first stationary scroll body according to an embodiment of the present invention;

[0028] Figure 6 It is a schematic structural diagram of the second static scroll body according to an embodiment of the present invention.

[0029] icon:

[0030] 100-orbiting scroll body; 110-first disk surface; 120-second disk surface; 130-first orbiting scroll structure; 140-second orbiting scroll structure; 150-connecting hole; 200-first stationary scroll body; 210-first stationary scroll structure; 300-second stationary scroll body; 310-second stationary scroll structure; 320-exhaust hole; 400-first compression chamber; 500-second compression chamber; 600-air inlet; 700-high pressure chamber. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0034] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0035] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0036] 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.

[0037] At present, during the operation of the compressor, a back pressure chamber needs to be set on the side of the movable scroll away from the fixed scroll to balance the pressure of the movable scroll from the gas in the compression chamber. Since the pressure of the compression chamber on the movable scroll is changing, and the pressure of the back pressure chamber is difficult to adjust and always changes later than the change of the compression chamber, the following problems arise:

[0038] 1. The pressure on both sides of the movable scroll axially cannot be effectively balanced, so that the movable scroll and the fixed scroll are too tight at the end surface of the profile, resulting in increased friction power loss or the lack of fit, resulting in increased axial leakage loss of the refrigerant in the compression working chamber;

[0039] 2. The axial forces on both sides of the movable scroll are unbalanced, resulting in axial movement, which leads to increased noise and vibration of the compressor;

[0040] 3. The inlet throttle hole of the back pressure chamber is easy to be blocked. When the inlet throttle hole is partially or completely blocked, the pressure value in the back pressure chamber is too small or there is no back pressure at all, which leads to the problem of increased axial leakage loss of refrigerant in the compression working chamber;

[0041] 4. The outlet throttle hole of the back pressure chamber is prone to blockage. When the outlet throttle hole is partially or completely blocked, the pressure in the back pressure chamber will be too high or completely equal to the pressure in the high pressure chamber 700, which will lead to increased friction power loss and greater wear of the scroll disk.

[0042] That is, the existing compressor has poor operating stability.

[0043] In view of this, the designer designed a scroll assembly, which realizes automatic balance through the two compression chambers on both sides of the movable scroll, the pressure on both sides of the movable scroll axially is balanced, and it is not easy to have a pressure difference. The movable scroll runs stably, and the fitting effect of the movable scroll and the static scroll at the end face of the profile is good, which can effectively avoid the axial leakage of the refrigerant in the compression working chamber, and also avoid the friction power loss and scroll wear caused by excessive clamping force on the end face of the profile. In addition, the back pressure chamber is omitted, which can fundamentally avoid the problem of easy blockage of the inlet and outlet throttle holes of the back pressure chamber.

[0044] See also Figure 1 and Figure 2In this embodiment, the scroll assembly includes an orbiting scroll body 100, a first stationary scroll body 200 and a second stationary scroll body 300. The orbiting scroll body 100 is provided with a first orbiting scroll structure 130 and a second orbiting scroll structure 140 on both sides of the axis extension direction thereof; the first stationary scroll body 200 is provided with a first stationary scroll structure 210, and the second stationary scroll body 300 is provided with a second stationary scroll structure 310; the orbiting scroll body 100 is arranged between the first stationary scroll body 200 and the second stationary scroll body 300, and the first orbiting scroll structure 130 cooperates with the first stationary scroll structure 210 to jointly define a first compression chamber 400; the second orbiting scroll structure 140 cooperates with the second stationary scroll structure 310 to jointly define a second compression chamber 500.

[0045] The working principle of the scroll assembly provided in this embodiment is as follows:

[0046] During operation, the refrigerant to be compressed is simultaneously introduced into the low-pressure areas of the first compression chamber 400 and the second compression chamber 500 for synchronous compression. In this way, the pressures on both sides of the movable scroll body 100 in the axial direction are substantially equal, thus achieving dynamic balance. There is no pressure difference in the axial direction of the movable scroll body 100, and the movable scroll body 100 is not easy to jump in the axial direction, which effectively improves the problem in the prior art that the friction power loss is large due to the tight fit between the movable scroll body 100 and the static scroll body, or the axial leakage loss of the refrigerant in the compression chamber is increased due to the loose fit between the two. At the same time, the movable scroll body 100 is not easy to jump in the axial direction, which greatly improves the noise and vibration problems during the operation of the compressor, and the compressor has stable performance, long service life and low operating cost.

[0047] It should be noted that the end surface of the first movable scroll structure 130 , the end surface of the second movable scroll structure 140 , the end surface of the first fixed scroll structure 210 , and the end surface of the second fixed scroll structure 310 can all be referred to as profile end surfaces.

[0048] See also Figure 3 and Figure 4Optionally, the movable scroll body 100 has a first disk surface 110 and a second disk surface 120, the first disk surface 110 is provided with a first movable scroll structure 130, and the second disk surface 120 is provided with a second movable scroll structure 140, the first movable scroll structure 130 and the second movable scroll structure 140 are arranged in a mirror-symmetrical manner, that is, the first movable scroll structure 130 and the second movable scroll structure 140 are exactly the same, the starting ends of the vortices of the two are located on the same axis, and the ending ends of the two are located on the same axis. In this way, it is beneficial to the processing and manufacturing of the movable scroll body 100, the first movable scroll structure 130 and the second movable scroll structure 140, and when the movable scroll body 100 cooperates with the two fixed scroll bodies, the first compression chamber 400 and the second compression chamber 500 formed are mirror-symmetrical, and the first compression chamber 400 and the second compression chamber 500 can perform the function of synchronously compressing the refrigerant, effectively ensuring that the pressure difference in the axial direction of the movable scroll body 100 is zero, that is, effectively ensuring that the pressure on both sides of the axial direction of the movable scroll body 100 remains equal at any time during the operation of the compressor. The movable scroll body 100 is balanced in axial force and runs smoothly. It should be understood that the refrigerant inlets of the first compression chamber 400 and the second compression chamber 500 are interconnected, so that the pressure of the first compression chamber 400 and the second compression chamber 500 remains equal.

[0049] Further, the movable scroll body 100 is provided with a connecting hole 150, and the number of the connecting holes 150 can be multiple. For example, in this embodiment, the number of the connecting holes 150 is three. The connecting hole 150 runs through the two disk surfaces of the movable scroll body 100, that is, one end of the connecting hole 150 is located on the first disk surface 110, and the other end is located on the second disk surface 120. In other embodiments, the number of the connecting holes 150 is not limited to three. The connecting hole 150 connects the high-pressure area of ​​the first compression chamber 400 and the second compression chamber 500. In this way, the refrigerant enters the low-pressure area of ​​the first compression chamber 400 and the second compression chamber 500 from the low-pressure chamber of the compressor from the air inlet 600. After the refrigerant is compressed in the first compression chamber 400 and the second compression chamber 500, since the high-pressure area of ​​the first compression chamber 400 and the second compression chamber 500 is connected, the refrigerant in the high-pressure area can smoothly enter the high-pressure chamber 700 of the compressor from the exhaust hole 320 and finally be discharged. For example, in this embodiment, three exhaust holes 320 are provided on the second fixed scroll, and the three exhaust holes 320 can be matched with the three connecting holes 150 in a one-to-one correspondence, so that the gas enters the high-pressure chamber 700 from the compression chamber. In this way, only one high-pressure chamber 700 is provided, and the compressor structure is compact and the compressor volume is small.

[0050] Please combine Figure 1 , Figure 5 and Figure 6In this embodiment, optionally, the first fixed scroll body 200 and the second fixed scroll body 300 can be fixedly connected by fasteners such as pins, so that the two are relatively fixed in the direction of the axis extension of the movable scroll body 100. At the same time, the movable scroll body 100 is relatively fixed with the first fixed scroll body 200 and the second fixed scroll body 300 in the direction of its axis extension, so that it is convenient to assemble the movable scroll body 100 between the first fixed scroll body 200 and the second fixed scroll body 300, so that the degree of fit between the movable scroll body 100 and the first fixed scroll body 200 is consistent with the degree of fit between the movable scroll body 100 and the second fixed scroll body 300. It should be understood that since the first movable scroll structure 130 and the second movable scroll structure 140 on the movable scroll body 100 are mirror-symmetrical, the first fixed scroll structure 210 on the first fixed scroll body 200 and the second fixed scroll structure 310 on the second fixed scroll body 300 are also mirror-symmetrical.

[0051] In this embodiment, optionally, the scroll assembly further includes a driving mechanism (not shown), which is connected to the movable scroll body 100 and is used to drive the movable scroll body 100 to perform circumferential translation relative to the first fixed scroll body 200 and the second fixed scroll body 300. The driving mechanism includes a motor, an eccentric shaft and a transmission member, the eccentric shaft is connected to the motor, the transmission member is connected to the eccentric shaft, and the transmission member is connected to the movable scroll body 100, and can drive the movable scroll body 100 to perform circumferential translation.

[0052] The scroll assembly provided in this embodiment has a reasonable structure, stable and reliable performance during the operation of the compressor, a long service life, and low operating costs.

[0053] This embodiment also provides a scroll compressor, which includes the scroll assembly mentioned in the above embodiment. Obviously, the scroll compressor also includes other components that can realize the normal function of the compressor, which are not listed one by one in this embodiment.

[0054] This embodiment also provides a vehicle air-conditioning system, including the compressor mentioned in the above embodiment. Obviously, the vehicle air-conditioning system also includes other components that cooperate with the compressor to realize its basic functions, which are not listed one by one in this embodiment.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. 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 scroll assembly, characterized in that: include: An orbiting scroll body, a first stationary scroll body and a second stationary scroll body, wherein the orbiting scroll body is provided with a first orbiting scroll structure and a second orbiting scroll structure on both sides of the orbiting scroll body in the extension direction of its axis respectively; the first stationary scroll body is provided with a first stationary scroll structure, and the second stationary scroll body is provided with a second stationary scroll structure; the orbiting scroll body is arranged between the first stationary scroll body and the second stationary scroll body, and the first orbiting scroll structure cooperates with the first stationary scroll structure to jointly define a first compression chamber; the second orbiting scroll structure cooperates with the second stationary scroll structure to jointly define a second compression chamber; The first compression chamber is connected to the second compression chamber; The movable scroll body is provided with a communication hole, and the first compression chamber and the second compression chamber are connected through the communication hole; The first stationary scroll body is fixedly connected to the second stationary scroll body, and the two are relatively fixed in the extending direction of the axis of the movable scroll body.

2. The scroll assembly according to claim 1, characterized in that: The first movable scroll structure and the second movable scroll structure are arranged in mirror symmetry.

3. The scroll assembly according to claim 1, characterized in that: The number of the communicating holes is multiple, and the first static scroll body or the second static scroll body is provided with a plurality of exhaust holes equal to the number of the communicating holes, and the plurality of communicating holes correspond one-to-one to the plurality of exhaust holes respectively.

4. The scroll assembly according to claim 1, characterized in that: The movable scroll body is relatively fixed to the first fixed scroll body and the second fixed scroll body in the extending direction of the axis thereof.

5. The scroll assembly according to claim 1, characterized in that: The scroll assembly further includes a driving mechanism connected to the movable scroll body and configured to drive the movable scroll body to perform a circumferential translation relative to the first stationary scroll body and the second stationary scroll body.

6. A scroll compressor, characterized in that: The scroll compressor comprises: The scroll assembly according to any one of claims 1 to 5.

7. A vehicle air conditioning system, characterized in that: The vehicle air conditioning system comprises: The scroll compressor according to claim 6.

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