Pump body assembly and scroll compressor

Abstract

This application provides a pump body assembly and a scroll compressor. The pump body assembly includes a moving scroll base plate with a first side and a second side disposed opposite to each other. The first side is used to provide scroll teeth; a stationary scroll, which is in close contact with the first side to form the suction chamber; and a cover plate, which is fastened to the second side to form a sealed cavity. The sealed cavity has an inlet and outlet communicating with the suction chamber. This application provides a sealed cavity for refrigerant entry and exit on one side of the moving scroll base plate, so that the low-temperature refrigerant cools the base plate to reduce the thermal deformation of the moving scroll base plate.

Description

Technical Field

[0001] This application belongs to the field of scroll compressor technology, specifically relating to a pump body assembly and a scroll compressor. Background Technology

[0002] Scroll compressors are characterized by their simple structure, small size, light weight, low noise, high mechanical efficiency, and stable operation. However, when the ambient temperature is low, the refrigerant suction specific volume increases, the discharge pressure is higher than the suction pressure, the refrigerant mass flow rate decreases, and the compressor pump body's heat dissipation capacity declines. This results in the heat generated by compression or friction within the pump body not being carried away by the discharge, leading to a higher discharge temperature. Under high discharge temperatures, the pump body experiences significant thermal deformation, especially the moving scroll. Due to its thin base plate, thermal deformation can easily cause adhesive wear between the moving scroll base plate and the stationary scroll teeth, thus affecting the compressor's reliability.

[0003] To solve the problem of adhesive wear at the bottom of the moving vortex base plate, a common solution is to increase the gap between the moving vortex base plate and the top of the stationary vortex teeth. However, with the development of high-speed vortexes, the demand for high energy efficiency is becoming more and more urgent, and increasing the gap will lead to leakage in the pump body compression chamber. Summary of the Invention

[0004] Therefore, this application provides a pump body assembly and a scroll compressor, which can solve the problem in the prior art that the thin thickness of the moving scroll plate is such that thermal deformation can easily cause adhesive wear between the moving plate plate and the tooth tip of the stationary scroll, thereby affecting the reliability of the compressor.

[0005] To address the aforementioned problems, this application provides a pump body assembly, comprising:

[0006] The moving scroll plate includes a first side and a second side disposed opposite to each other, wherein the first side is used to form scroll teeth.

[0007] A static vortex disk, which is in close contact with the first side surface to form the air intake chamber;

[0008] The cover plate is fastened to the second side to form a sealed cavity; the sealed cavity is provided with an inlet and outlet that communicate with the air intake cavity.

[0009] In some implementations...

[0010] The moving scroll plate is provided with at least two axial through holes that connect the first side and the second side. At least one of the axial through holes is connected to the sealing cavity at one end and to the air intake cavity at the other end.

[0011] In some implementations...

[0012] One end of the axial through hole is always connected to the sealing cavity, while the other end is intermittently connected to the suction cavity as the moving vortex plate moves.

[0013] In some implementations...

[0014] All of the axial through holes are located at one end of the first side surface, extending and penetrating within the vortex teeth.

[0015] In some implementations...

[0016] The vortex tooth with the axial through hole is located at the furthest point away from the center of the moving vortex substrate.

[0017] In some implementations...

[0018] The axial through hole has two parts: a first through hole and a third through hole. The first through hole and the third through hole are spaced apart in the vortex tooth. The third through hole is always connected to the air intake chamber, while the first through hole is intermittently connected to the air intake chamber.

[0019] In some implementations...

[0020] The distance between the first through hole and the center of the moving vortex substrate is less than the distance between the third through hole and the center of the moving vortex substrate, and the vortex teeth are stepped at the location where the third through hole is set, so that the axial length of the third through hole is less than the axial length of the first through hole.

[0021] In some implementations...

[0022] The second side has a groove, and the cover plate is sealed and fastened to the groove to form the sealing cavity; the side wall of the groove has at least two radially extending second through holes, and all the second through holes are respectively connected to the axial through holes one by one.

[0023] In some implementations...

[0024] The sealing cavity is located near the center of the moving volute substrate relative to the second through hole. The second through hole extends radially out of the periphery of the moving volute substrate, and a sealing pin is inserted into the portion of the second through hole near the periphery. The axial through hole communicates with the middle portion of the second through hole.

[0025] According to another aspect of this application, a scroll compressor is provided, including the pump body assembly as described above.

[0026] This application provides a pump body assembly, comprising: a moving scroll plate, including a first side and a second side disposed opposite to each other, the first side being used to provide scroll teeth; a stationary scroll, the stationary scroll being in close contact with the first side to form the suction chamber; a cover plate, fastened to the second side to form a sealing chamber; the sealing chamber having an inlet and outlet communicating with the suction chamber of the pump body assembly.

[0027] This application has the following beneficial effects:

[0028] A sealed cavity for refrigerant entry and exit is provided on one side of the moving scroll plate substrate, so that the low-temperature refrigerant cools the substrate, thereby reducing the thermal deformation of the moving scroll plate substrate. Attached Figure Description

[0029] To more clearly illustrate the embodiments of this application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of a scroll compressor according to an embodiment of this application;

[0031] Figure 2 This is a schematic diagram of the pump body assembly according to an embodiment of this application;

[0032] Figure 3 This is a schematic diagram of the structure of the moving scroll plate according to an embodiment of this application;

[0033] Figure 4 Examples of this application Figure 3 Sectional view along line AA;

[0034] Figure 5 Examples of this application Figure 3 Sectional view along the BB direction;

[0035] Figure 6 This is a schematic diagram of the structure of the moving scroll plate with dual axial through holes in an embodiment of this application;

[0036] Figure 7 This is a schematic diagram of the structure of the moving scroll plate with uniaxial through-hole connection in an embodiment of this application.

[0037] The reference numerals in the attached figures are as follows:

[0038] 1. Stationary scroll; 2. Moving scroll; 3. Upper bracket; 4. Motor; 5. Housing; 6. Lower cover; 7. Oil pump; 8. Lower bracket; 9. Rotor; 10. Crankshaft; 11. Lower support ring; 12. Cross slip ring; 13. Upper cover; 14. Intake pipe; 15. Cover plate; 17. Sealing pin;

[0039] 100. Intake chamber; 101. Axial hole; 102. Radial hole;

[0040] 201. Sealed cavity; 202. Second through hole; 203. First through hole; 204. Scroll tooth; 205. Moving scroll plate; 206. Bottom; 207. Third through hole; 208. Step. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0042] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0043] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0044] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the structures, proportions, sizes, etc., shown in the accompanying drawings are only for the purpose of illustrative purposes and to facilitate understanding and reading by those skilled in the art, and are not intended to limit the implementation conditions of this application. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose achieved by this application, should still fall within the scope of the technical content disclosed in this application. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0045] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0046] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0047] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0048] See also Figures 1 to 7 As shown, according to an embodiment of this application, a pump body assembly includes:

[0049] The moving scroll plate 205 includes a first side and a second side disposed opposite to each other, wherein the first side is used to provide the scroll teeth 204.

[0050] A static vortex disk 1, which is in close contact with the first side surface to form the air intake chamber 100;

[0051] The cover plate 15 is fastened to the second side to form a sealing cavity 201; the sealing cavity 201 is provided with an inlet and outlet that communicate with the air intake cavity 100.

[0052] This application provides a sealed cavity 201 for refrigerant inlet and outlet on one side of the moving scroll plate 205, so that the low-temperature refrigerant cools the plate to reduce the thermal deformation of the moving scroll plate 205.

[0053] In this application, a sealing cavity 201 is provided on the side of the moving scroll plate 205 away from the stationary scroll 1. The sealing cavity 201 is provided with a refrigerant inlet and outlet. When the refrigerant enters and exits the sealing cavity 201, it will carry away the heat on the moving scroll plate 205, reducing the occurrence of heat deformation of the moving scroll plate 205. At the same time, since the sealing cavity 201 is located on the side away from the stationary scroll 1, it will not affect the efficient operation of the compressor itself, and can maintain the stability and reliability of the compressor operation.

[0054] In some implementations...

[0055] The moving scroll plate 205 is provided with at least two axial through holes that connect the first side and the second side. One end of at least one of the axial through holes is connected to the sealing cavity 201, and the other end is connected to the air intake cavity 100.

[0056] The inlet and outlet of the sealing cavity 201 can be specifically configured by using axial through holes that penetrate the moving scroll plate 205 and connect the first side and the second side. There are at least two axial through holes. One end of one of the axial through holes is connected to the sealing cavity 201, and the other end is connected to the suction cavity 100 of the pump body assembly. In this way, the low-temperature refrigerant in the suction cavity 100 will enter the sealing cavity 201 along the first through hole 203, thereby achieving the cooling effect on the moving scroll plate 205.

[0057] In some implementations...

[0058] One end of the axial through hole is always connected to the sealing cavity 201, while the other end is intermittently connected to the suction cavity 100 as the moving scroll plate 205 moves.

[0059] The use of intermittently connected axial through holes allows for smooth gas flow within the sealing cavity 201, thereby promoting airflow circulation within the sealing cavity 201 and accelerating heat dissipation of the moving scroll plate 205.

[0060] In some implementations...

[0061] All of the axial through holes are located at one end of the first side surface, extending and penetrating within the vortex tooth 204.

[0062] By setting the axial through holes in the vortex tooth 204, and since the moving vortex 2 itself moves in a circular motion on a plane, it is possible to ensure that part of the axial through holes is always connected to the suction chamber 100, while the other part is intermittently connected to the suction chamber 100. This ensures that when the connection is made, the sealing cavity 201 and the suction chamber 100 exchange hot and cold refrigerants, thereby achieving the cooling effect on the moving vortex substrate 205.

[0063] like Figure 1 and 2 As shown, the sealing cavity 201 is located below the suction cavity 100. After the refrigerant enters the sealing cavity 201, it absorbs the heat from the moving scroll plate 205 and forms a refrigerant with a higher temperature. Meanwhile, the refrigerant in the suction cavity 100 is a low-temperature refrigerant. When the axial through hole connects the sealing cavity 201 and the suction cavity 100, the high-temperature refrigerant and the low-temperature refrigerant flow in opposite directions, achieving displacement.

[0064] In some implementations...

[0065] The vortex tooth 204 with the axial through hole is located at the furthest point away from the center of the moving vortex substrate 205.

[0066] According to the conventional design of scroll compressors, the process from intake to compression is a process from external intake to internal compression. Therefore, the axial through hole is specifically set on the outermost scroll teeth 204 on the moving scroll 2, which can ensure that the low-temperature refrigerant can smoothly enter the sealing cavity 201 and cool down the moving scroll base plate 205.

[0067] In some implementations...

[0068] The axial through hole is provided in two parts: a first through hole 203 and a third through hole 207. The first through hole 203 and the third through hole 207 are provided at intervals in the vortex tooth 204. The third through hole 207 is always connected to the air intake chamber 100, while the first through hole 203 is intermittently connected to the air intake chamber 100.

[0069] When there are two axial through holes, the first through hole 203 and the third through hole 207 are set at intervals. This makes it convenient to set the third through hole 207 to always be connected to the air intake chamber 100, while the first through hole 203 is intermittently connected to the air intake chamber 100.

[0070] In some implementations...

[0071] The distance between the first through hole 203 and the center of the moving vortex substrate 205 is less than the distance between the third through hole 207 and the center of the moving vortex substrate 205, and the vortex tooth 204 is stepped at the location where the third through hole 207 is set, so that the axial length of the third through hole 207 is less than the axial length of the first through hole 203.

[0072] In some implementations...

[0073] The second side has a groove, and the cover plate 15 is sealed and fastened to the groove to form the sealing cavity 201; the side wall of the groove has at least two radially extending second through holes 202, and all the second through holes 202 are respectively connected to the axial through holes one by one.

[0074] By providing a sealed cavity 201 on the back of the moving scroll plate 205, the moving scroll plate 205 is cooled by flowing refrigerant, thus avoiding heat deformation of the plate and reducing the thickness of the plate. This includes providing a groove on the second side of the plate, with the cover plate 15 sealingly fastened to the groove to form the sealed cavity 201; this relatively reduces the weight of the plate and the energy consumption of operation.

[0075] A second through hole 202, which communicates with the axial through hole, is provided on the side wall of the groove to ensure that the sealing cavity 201 is connected to the outside, facilitating the entry and exit of the refrigerant. The second through hole 202 further reduces the weight and energy consumption of the substrate.

[0076] In some implementations...

[0077] The sealing cavity 201 is close to the center of the moving scroll plate 205 relative to the second through hole 202. The second through hole 202 extends radially out of the periphery of the moving scroll plate 205, and a sealing pin 17 is inserted into the portion of the second through hole 202 near the periphery. The first through hole 203 is connected to the middle portion of the second through hole 202.

[0078] Since the heat-generating parts of the moving scroll 2 and the stationary scroll 1 are mainly located at the center of the moving scroll 2, the sealing cavity 201 is located on its back side, and is connected to the first through hole 203 through the radially outward-extending second through hole 202.

[0079] Since the second through hole 202 is located in the moving scroll plate 205, for ease of manufacturing, a through hole structure extending to the outer periphery is provided radially, and the first through hole 203 is connected to the middle of the second through hole 202; and a sealing pin 17 is inserted near the periphery of the second through hole 202 to prevent refrigerant loss.

[0080] like Figure 1 , 2 As shown in Figure 3, this is a schematic diagram of the pump body structure of this application. The back of the base plate 205 of the moving scroll 2 is provided with a sealing cavity 201, which is sealed by a cover plate 15. The base plate 205 has two radially extending second through holes 202. One end of the second through hole 202 communicates with the sealing cavity 201, and the other end is sealed by a sealing pin 17.

[0081] The vortex tooth 204 has an axially extending first through hole 203 and a third through hole 207, both of which are connected to the middle of the second through hole 202. The first through hole 203 and the third through hole 207 are located at the tail of the vortex tooth 204. The first through hole 203 intermittently communicates with the suction chamber 100 of the stationary vortex disk 1. When the first through hole 203 intersects with the suction chamber 100, the low-temperature refrigerant in the suction chamber 100 can enter or flow out of the first through hole 203. Figure 4 As shown, the moving vortex 2 moves counterclockwise with a fixed radius. When the moving vortex 2 moves to... Figure 5 When the first through hole 203 is out of the area of ​​the suction chamber 100, the low-temperature refrigerant cannot enter or flow out of the first through hole 203.

[0082] A step 208 is provided on the tail of the vortex tooth 204, and an axially penetrating third through hole 207 is opened on the step 208. The third through hole 207 communicates with part of the second through hole 202. At the same time, the second through hole 202 communicates with the sealing cavity 201. The third through hole 207 is opened at the tail of the vortex tooth 204 and is always in communication with the air intake cavity 100.

[0083] During compressor operation, the low-temperature refrigerant drawn in through the suction pipe 14 enters the suction chamber 100. The refrigerant then enters the sealing chamber 201 through the third through hole 207 and the second through hole 202 to cool the moving scroll plate 205. This helps reduce thermal deformation of the moving scroll plate 205 caused by excessively high exhaust temperatures, thus preventing adhesive wear caused by thermal deformation contact between the scroll teeth of the stationary scroll 1 and the bottom 206 of the moving scroll plate 205, thereby improving the compressor's reliability. Simultaneously, the first through hole 203 and the second through hole 202 serve as bypass channels, intermittently communicating with the suction chamber 100. When these channels are open, they promote airflow circulation within the sealing chamber 201, accelerating heat dissipation from the moving scroll plate 205.

[0084] According to another aspect of this application, a scroll compressor is provided, including the pump body assembly as described above.

[0085] like Figure 1 As shown, the scroll compressor mainly consists of a motor 4, an upper bracket 3, a lower bracket 8, a stationary scroll 1, a moving scroll 2, a cross slip ring 12, and a crankshaft 10. The motor 4 is fixed to the housing 5 by a heat-shrink fitting, and the upper bracket 3 is spot-welded to the inner wall of the housing 5. The moving scroll 2 and the stationary scroll 1 are mounted opposite each other on the upper bracket 3 with a phase angle difference of 180°. Driven by the crankshaft 10, the moving scroll 2 moves and meshes with the stationary scroll 1 to form a series of mutually isolated, continuously varying crescent-shaped sealed cavities. The stationary scroll 1 is fixed to the upper bracket 3 by screw fasteners. The lower bracket 8 is fixed to the lower support ring 11 by screws, and the lower support ring 11 is then spot-welded to the housing 5.

[0086] When the compressor is running, the motor 4 drives the crankshaft 10 to rotate. The crank of the crankshaft 10 drives the moving scroll 2 to move. Under the anti-rotation restriction of the cross slip ring 12, the moving scroll 2 performs translational motion around the center of the crankshaft 10 with a fixed radius. The refrigerant entering from the suction pipe 14 is drawn into the crescent-shaped suction chamber formed by the moving scroll 2 and the stationary scroll 1. After being compressed, it is discharged from the exhaust port of the stationary scroll 1 and enters the cavity between the upper cover 13 and the stationary scroll 1. Then, it enters the cavity between the upper support 3 and the motor 4 through the exhaust groove of the stationary scroll 1 and the upper bracket 3. Part of it enters the lower end of the motor 4 through the flow groove between the motor 4 and the housing 5. Finally, the high-pressure exhaust refrigerant is discharged through the exhaust pipe.

[0087] During operation of the scroll compressor in this application, if Figure 4 and 5 As shown, the low-temperature refrigerant drawn in from the suction pipe 14 enters the suction chamber 100. The low-temperature refrigerant enters the sealing chamber 201 through the first through hole 203, the third through hole 207, and the second through hole 202 to cool the moving scroll plate 205. This helps to reduce the thermal deformation of the moving scroll plate 205 caused by excessive exhaust temperature, thus avoiding adhesive wear caused by thermal deformation contact between the stationary scroll tooth and the bottom 206 of the moving scroll plate 205, thereby improving the reliability of the compressor.

[0088] In addition, reducing the thermal deformation of the moving scroll base plate 205 solves the leakage problem caused by the conventional method of increasing the gap between the tooth root of the moving scroll 2 and the tooth tip of the stationary scroll 1. This is beneficial for the small gap design of the scroll tooth root, reducing leakage and improving the energy efficiency of the compressor.

[0089] The pump body structure with cooling function proposed in this application uses low-temperature suction to cool the moving scroll plate, thereby reducing the thermal deformation of the moving scroll plate and improving the reliability of the compressor.

[0090] It will be readily understood by those skilled in the art that the above embodiments can be freely combined and superimposed without conflict.

[0091] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above description is merely a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A pump body assembly, characterized in that, include: The moving vortex substrate (205) includes a first side and a second side disposed opposite to each other, wherein the first side is used to provide vortex teeth (204). A static vortex disk (1) is formed by closely surrounding the first side surface to create an air intake chamber (100); A cover plate (15) is fastened to the second side to form a sealed cavity (201); the sealed cavity (201) is provided with an inlet and outlet that communicate with the air intake cavity (100); The moving scroll plate (205) is provided with two axial through holes that connect the first side and the second side. The inlet and outlet are the two axial through holes. One end of one of the axial through holes is connected to the sealing cavity (201), and the other end is connected to the suction cavity (100). One end of the other axial through hole is always connected to the sealing cavity (201), and the other end is intermittently connected to the suction cavity (100) as the moving scroll plate (205) moves. All of the axial through holes are located at one end of the first side surface, extending and penetrating into the vortex tooth (204); The axial through hole is provided in two parts: a first through hole (203) and a third through hole (207). The first through hole (203) and the third through hole (207) are spaced apart in the vortex tooth (204). The third through hole (207) is always connected to the air intake chamber (100), while the first through hole (203) is intermittently connected to the air intake chamber (100).

2. The pump body assembly according to claim 1, characterized in that: The vortex tooth (204) with the axial through hole is located at the furthest point away from the center of the moving vortex substrate (205).

3. The pump body assembly according to claim 1, characterized in that: The distance between the first through hole (203) and the center of the moving vortex substrate (205) is less than the distance between the third through hole (207) and the center of the moving vortex substrate (205), and the vortex tooth (204) is stepped at the location of the third through hole (207) so that the axial length of the third through hole (207) is less than the axial length of the first through hole (203).

4. The pump body assembly according to claim 1 or 3, characterized in that: The second side is provided with a groove, and the cover plate (15) is sealed and fastened with the groove to form the sealing cavity (201); the side wall of the groove is provided with at least two radially extending second through holes (202), and all the second through holes (202) are respectively connected to the axial through holes one by one.

5. The pump body assembly according to claim 4, characterized in that: The sealing cavity (201) is close to the center of the moving scroll plate (205) relative to the second through hole (202). The second through hole (202) extends radially out of the periphery of the moving scroll plate (205), and a sealing pin (17) is inserted into the portion of the second through hole (202) near the periphery. The axial through hole communicates with the middle portion of the second through hole (202).

6. A scroll compressor, characterized in that, Includes the pump body assembly as described in any one of claims 1-5.

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