CN221257134U - Pump body assembly and scroll compressor - Google Patents

Abstract

The application provides a pump body assembly and a scroll compressor. The pump body assembly comprises a movable scroll base plate, a first side surface and a second side surface, wherein the first side surface and the second side surface are arranged in opposite directions, and the first side surface is used for arranging scroll teeth; the fixed vortex disc is closely connected with the first side face to form the air suction cavity; the cover plate is buckled on the second side surface to form a sealing cavity; the sealing cavity is provided with an inlet and an outlet communicated with the air suction cavity. According to the application, the sealing cavity for the refrigerant to enter and exit is arranged on one side surface of the movable vortex plate substrate, so that the low-temperature refrigerant cools the substrate, and the aim of reducing the thermal deformation of the movable vortex plate substrate is fulfilled.

Description

Pump body assembly and scroll compressor

Technical Field

The application belongs to the technical field of scroll compressors, and particularly relates to a pump body assembly and a scroll compressor.

Background

The vortex compressor has the characteristics of simple structure, small volume, light weight, low noise, high mechanical efficiency, stable operation and the like. However, when the ambient temperature is low, the suction specific volume of the refrigerant is increased, the discharge pressure is larger than the suction pressure, the mass flow of the refrigerant is reduced, the heat dissipation capacity of the pump body of the compressor is reduced, and heat generated by compression or friction of the pump body cannot be taken out through the discharge air, so that the discharge air temperature of the pump body is high. In the environment of high exhaust temperature, the thermal deformation of the pump body is relatively large, and particularly, the thermal deformation of the base plate of the movable scroll can lead the base plate of the movable scroll and the tooth tip of the fixed scroll to be extremely easy to generate adhesive wear, so that the reliability of the compressor is affected.

In order to solve the problem of adhesive wear of the tooth bottoms of the movable scroll base plates, the common solution is to increase the gap between the movable scroll base plates and the tooth tops of the fixed scroll, but along with the development of high-speed vortex, the high-energy efficiency requirement is more and more urgent, and the problem of leakage of a compression cavity of a pump body can be brought by increasing the gap.

Disclosure of utility model

Therefore, the application provides the pump body assembly and the scroll compressor, which can solve the problems that the thickness of the movable scroll base plate is thin, the thermal deformation can lead the movable scroll base plate and the fixed scroll tooth crest to be easily subjected to adhesive wear, and the reliability of the compressor is affected.

In order to solve the above problems, the present application provides a pump body assembly, comprising:

the movable vortex disc base plate comprises a first side face and a second side face which are arranged in a back-to-back mode, and the first side face is used for arranging vortex teeth;

The fixed vortex disc is closely connected with the first side face to form an air suction cavity;

the cover plate is buckled on the second side surface to form a sealing cavity; the sealing cavity is provided with an inlet and an outlet communicated with the air suction cavity.

In some embodiments of the present invention, in some embodiments,

The movable vortex plate base plate is provided with at least two axial through holes for conducting the first side face and the second side face, one end of at least one axial through hole is communicated with the sealing cavity, and the other end of at least one axial through hole is communicated with the air suction cavity.

In some embodiments of the present invention, in some embodiments,

One end of part of the axial through holes is always communicated with the sealing cavity, and the other end of the axial through holes is intermittently communicated with the air suction cavity along with the movement of the movable vortex plate base plate.

In some embodiments of the present invention, in some embodiments,

All the axial through holes are positioned at one end of the first side surface, extend and are penetratingly arranged in the vortex teeth.

In some embodiments of the present invention, in some embodiments,

The scroll wrap provided with the axial through hole is located furthest from the center of the orbiting scroll base plate.

In some embodiments of the present invention, in some embodiments,

The axial through hole is provided with two: the first through hole and the third through hole are arranged in the vortex teeth at intervals; the third through hole is always communicated with the air suction cavity, and the first through hole is intermittently communicated with the air suction cavity.

In some embodiments of the present invention, in some embodiments,

The distance between the first through hole and the center of the movable vortex disc substrate is smaller than the distance between the third through hole and the center of the movable vortex disc substrate, and the vortex teeth are arranged at the position where the third through hole is arranged to be in a step shape, so that the axial length of the third through hole is smaller than that of the first through hole.

In some embodiments of the present invention, in some embodiments,

The second side face is provided with a groove, and the cover plate is in sealing buckling with the groove to form the sealing cavity; and the side wall of the groove is provided with at least two second through holes extending in the radial direction, and all the second through holes are communicated with the axial through holes in a one-to-one correspondence manner.

In some embodiments of the present invention, in some embodiments,

The sealing cavity is close to the center of the movable vortex disc substrate relative to the second through hole, the second through hole radially extends out of the periphery of the movable vortex disc substrate, and a sealing pin is inserted into the part, close to the periphery, of the second through hole; the axial through hole is communicated with the middle part of the second through hole.

According to another aspect of the present application there is provided a scroll compressor comprising a pump body assembly as described above.

The application provides a pump body assembly, comprising: the movable vortex disc base plate comprises a first side face and a second side face which are arranged in a back-to-back mode, and the first side face is used for arranging vortex teeth; the fixed vortex disc is closely connected with the first side face to form an air suction cavity; the cover plate is buckled on the second side surface to form a sealing cavity; the sealing cavity is provided with an inlet and an outlet which are communicated with the suction cavity of the pump body assembly.

The application has the following beneficial effects:

a sealing cavity for cooling medium to enter and exit is arranged on one side surface of the movable vortex plate base plate, so that the low-temperature cooling medium cools the base plate, and the aim of reducing the thermal deformation of the movable vortex plate base plate is fulfilled.

Drawings

In order to more clearly illustrate the embodiments of the present 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 described below. The drawings in the following description are merely exemplary and other implementations drawings may be derived from the drawings provided without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a scroll compressor according to an embodiment of the present application;

FIG. 2 is a schematic view of a pump body assembly according to an embodiment of the present application;

FIG. 3 is a schematic view of an orbiting scroll according to an embodiment of the present application;

FIG. 4 is a cross-sectional view taken along line A-A in FIG. 3 in accordance with an embodiment of the present application;

FIG. 5 is a cross-sectional view taken along the direction B-B in FIG. 3 in accordance with an embodiment of the present application;

FIG. 6 is a schematic diagram of a dual axial through hole communication for orbiting scroll in accordance with an embodiment of the present application;

Fig. 7 is a schematic diagram of a structure of a single axial through hole communication for running a movable scroll according to an embodiment of the present application.

The reference numerals are expressed as:

1. A fixed scroll; 2. a movable scroll; 3. an upper bracket; 4. a motor; 5. a housing; 6. a lower cover; 7. an oil pump; 8. a lower bracket; 9. a rotor; 10. a crankshaft; 11. a lower support ring; 12. a cross slip ring; 13. an upper cover; 14. an air suction pipe; 15. a cover plate; 17. a seal pin;

100. An air suction cavity; 101. an axial bore; 102. a radial hole;

201. Sealing the cavity; 202. a second through hole; 203. a first through hole; 204. a scroll wrap; 205. a movable scroll base plate; 206. a bottom; 207. a third through hole; 208. a step.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. It should be understood, however, that the construction, proportion, and size of the drawings, in which the present application is practiced, are all intended to be illustrative only, and not to limit the scope of the present application, which should be defined by the appended claims. Any structural modification, proportional change or size adjustment should still fall within the scope of the disclosure without affecting the efficacy and achievement of the present application. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present application, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present application; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present application.

Referring now to fig. 1-7 in combination, a pump body assembly according to an embodiment of the present application includes:

the orbiting scroll base plate 205 comprises a first side surface and a second side surface which are arranged opposite to each other, wherein the first side surface is used for arranging scroll teeth 204;

the fixed vortex disc 1 is closely connected with the first side surface to form an air suction cavity 100;

A cover plate 15 fastened on the second side surface to form a sealed cavity 201; the sealed chamber 201 is provided with an inlet and an outlet communicating with the suction chamber 100.

The application sets the sealing cavity 201 for the coolant to enter and exit on one side of the movable scroll base plate 205, so that the low-temperature coolant cools the base plate, thereby achieving the purpose of reducing the thermal deformation of the movable scroll base plate 205.

According to the application, the sealing cavity 201 is arranged on the side surface of the movable vortex plate substrate 205, which is far away from the fixed vortex plate 1, and the sealing cavity 201 is provided with the refrigerant inlet and outlet, so that when the refrigerant enters and exits the sealing cavity 201, the heat on the movable vortex plate substrate 205 can be taken away, the occurrence of the phenomenon of thermal deformation of the movable vortex plate substrate 205 is reduced, and meanwhile, the sealing cavity 201 is arranged on the side surface, which is far away from the fixed vortex plate 1, so that the high-efficiency operation of the compressor is not influenced, and the stability and reliability of the operation of the compressor can be maintained.

In some embodiments of the present invention, in some embodiments,

At least two axial through holes for conducting the first side surface and the second side surface are formed in the orbiting scroll base plate 205, one end of at least one axial through hole is communicated with the sealing cavity 201, and the other end is communicated with the air suction cavity 100.

The inlet and outlet of the seal cavity 201 are specifically arranged, the axial through holes penetrating through the movable vortex plate substrate 205 and communicating the first side face and the second side face can be adopted, at least two axial through holes are arranged, one end of one axial through hole is communicated with the seal cavity 201, the other end of the axial through hole is communicated with the suction cavity 100 of the pump body assembly, and therefore low-temperature refrigerant in the suction cavity 100 can enter the seal cavity 201 along the first through hole 203, and the cooling effect on the movable vortex plate substrate 205 is achieved.

In some embodiments of the present invention, in some embodiments,

One end of a part of the axial through holes is always communicated with the sealing cavity 201, and the other end of the axial through holes moves along with the orbiting scroll base plate 205 to be communicated with the suction cavity 100 intermittently.

The intermittent axial through holes are adopted to ensure that the gas in the sealing cavity 201 flows smoothly, so that the circulation of the gas flow in the sealing cavity 201 is promoted, and the heat dissipation of the movable vortex plate substrate 205 is accelerated.

In some embodiments of the present invention, in some embodiments,

All of the axial through holes are located at one end of the first side surface, extend through and are disposed in the scroll wrap 204.

The axial through holes are arranged in the vortex teeth 204, and based on the fact that the movable vortex plate 2 does circular motion on a plane, the axial through holes can be communicated with the air suction cavity 100 all the time, and the other part of the axial through holes can be intermittently communicated with the air suction cavity 100, so that the sealing cavity 201 and the air suction cavity 100 can be ensured to be replaced by cold and hot refrigerants during the communication, and the cooling effect on the movable vortex plate substrate 205 is achieved.

As shown in fig. 1 and 2, the seal chamber 201 is disposed below the suction chamber 100, after the refrigerant enters the seal chamber 201 and absorbs heat of the orbiting scroll substrate 205, a refrigerant with a relatively high temperature is formed, and the refrigerant in the suction chamber 100 is a low-temperature refrigerant, and when the seal chamber 201 and the suction chamber 100 are conducted by the axial through hole, the high-temperature refrigerant and the low-temperature refrigerant flow in opposite directions to realize replacement.

In some embodiments of the present invention, in some embodiments,

The scroll wrap 204 provided with the axial through hole is located furthest from the center of the orbiting scroll base plate 205.

According to the conventional design of the scroll compressor, the process from external suction to internal compression is performed, so that the axial through hole is specifically arranged on the scroll teeth 204 at the outermost periphery of the movable scroll 2, and the low-temperature refrigerant can be ensured to smoothly enter the sealing cavity 201 to cool the movable scroll substrate 205.

In some embodiments of the present invention, in some embodiments,

The axial through hole is provided with two: a first through hole 203 and a third through hole 207, wherein the first through hole 203 and the third through hole 207 are arranged in the scroll teeth 204 at intervals; the third through hole 207 is always communicated with the suction cavity 100, and the first through hole 203 is intermittently communicated with the suction cavity 100.

In the case that two axial through holes are provided, the first through hole 203 and the third through hole 207 are arranged at intervals, so that the third through hole 207 is conveniently arranged to be always communicated with the suction cavity 100, and the first through hole 203 is intermittently communicated with the suction cavity 100.

In some embodiments of the present invention, in some embodiments,

The distance between the first through hole 203 and the center of the orbiting scroll base plate 205 is smaller than the distance between the third through hole 207 and the center of the orbiting scroll base plate 205, and the scroll wrap 204 is stepped where the third through hole 207 is provided such that the axial length of the third through hole 207 is smaller than the axial length of the first through hole 203.

In some embodiments of the present invention, in some embodiments,

The second side surface is provided with a groove, and the cover plate 15 is in sealing buckling with the groove to form the sealing cavity 201; the side wall of the groove is provided with at least two second through holes 202 extending radially, and all the second through holes 202 are respectively communicated with the axial through holes in a one-to-one correspondence manner.

The sealing cavity 201 is arranged on the back surface of the movable vortex plate substrate 205, and the movable vortex plate substrate 205 is cooled by flowing refrigerant to avoid the heated deformation of the substrate, so that the thickness of the substrate can be reduced; the weight of the base plate and the energy consumption of operation are relatively reduced.

The side wall of the groove is provided with a second through hole 202 communicated with the axial through hole, so that the sealing cavity 201 is ensured to be communicated with the outside, and the refrigerant can conveniently enter and exit. The provision of the second through holes 202 further reduces the weight and power consumption of the substrate.

In some embodiments of the present invention, in some embodiments,

The sealing cavity 201 is close to the center of the orbiting scroll base plate 205 relative to the second through hole 202, the second through hole 202 extends out of the periphery of the orbiting scroll base plate 205 in the radial direction, and a sealing pin 17 is inserted into a part of the second through hole 202 close to the periphery; the first through hole 203 communicates with the middle portion of the second through hole 202.

Since the heat generating parts of the orbiting scroll 2 and the fixed scroll 1 are mainly located at the center of the orbiting scroll 2, the seal chamber 201 is provided at the rear surface thereof and communicates with the first through hole 203 through the second through hole 202 extending radially outward.

Since the second through hole 202 is disposed in the orbiting scroll substrate 205, for convenience of manufacture, a through hole structure penetrating to the outer periphery is disposed along the radial direction, and the first through hole 203 is communicated with the middle of the second through hole 202; and the sealing pin 17 is plugged into the peripheral edge of the second through hole 202 to avoid the loss of the refrigerant.

As shown in fig. 1, 2 and 3, which are schematic structural diagrams of a pump body part of the present application, a sealing cavity 201 is provided on the back surface of a base plate 205 of the orbiting scroll 2, the sealing cavity 201 is sealed by a cover plate 15, the base plate 205 is provided with two radially extending second through holes 202, one end of each second through hole 202 is communicated with the sealing cavity 201, and the other end is sealed by a sealing pin 17.

The scroll teeth 204 are provided with a first through hole 203 and a third through hole 207 which extend axially, the first through hole 203 and the third through hole 207 are both communicated with the middle part of the second through hole 202, the first through hole 203 and the third through hole 207 are arranged at the tail part of the scroll teeth 204, the first through hole 203 is intermittently communicated with the suction cavity 100 of the fixed scroll 1, when the first through hole 203 intersects with the suction cavity 100, the low-temperature refrigerant in the suction cavity 100 can enter or flow out of the first through hole 203, as shown in fig. 4, the movable scroll 2 moves anticlockwise with a fixed radius, and when the movable scroll 2 moves to the position of fig. 5, the first through hole 203 is separated from the area of the suction cavity 100, and the low-temperature refrigerant cannot enter or flow out of the first through hole 203.

A step 208 is arranged at the tail part of the vortex tooth 204, a third through hole 207 which is penetrated axially is arranged on the step 208, the third through hole 207 is communicated with part of the second through hole 202, meanwhile, the second through hole 202 is communicated with the seal cavity 201, the third through hole 207 is arranged at the tail part of the vortex tooth 204, and the third through hole 207 is communicated with the suction cavity 100 all the time.

In the operation of the compressor, the low-temperature refrigerant sucked from the suction pipe 14 enters the suction cavity 100, and the low-temperature refrigerant enters the sealing cavity 201 through the third through hole 207 and the second through hole 202, so as to cool the movable scroll base plate 205, thereby being beneficial to reducing the thermal deformation of the movable scroll base plate 205 caused by the overhigh exhaust temperature, and avoiding the adhesive wear generated by the thermal deformation contact between the vortex teeth of the fixed scroll 1 and the bottom 206 of the movable scroll base plate 205, so as to improve the reliability of the compressor. Meanwhile, the first through hole 203 and the second through hole 202 are intermittently communicated with the suction cavity 100 as bypass channels, and when the channels are opened, the circulation of air flow in the seal cavity 201 is promoted, and the heat dissipation of the orbiting scroll substrate 205 is accelerated.

According to another aspect of the present application there is provided a scroll compressor comprising a pump body assembly as described above.

As shown in fig. 1, the scroll compressor mainly comprises a motor 4, an upper bracket 3, a lower bracket 8, a fixed scroll 1, a movable scroll 2, a cross slip ring 12, a crankshaft 10 and the like. The motor 4 is fixed on the shell 5 through a hot sleeve, and the upper bracket 3 is fixed on the inner wall of the shell 5 through spot welding. The phase angles of the movable vortex disc 2 and the fixed vortex disc 1 are 180 degrees different and are oppositely arranged on the upper bracket 3, the movable vortex disc 2 moves under the drive of the crankshaft 10 and is meshed with the fixed vortex disc 1 to form a series of crescent sealed cavities which are isolated from each other and have continuously-changing volumes, and the fixed vortex disc 1 is fixed on the upper bracket 3 through screw fasteners. The lower bracket 8 is fixed on the lower support ring 11 by screws, and the lower support ring 11 is fixed on the housing 5 by spot welding.

When the compressor is operated, the motor 4 drives the crankshaft 10 to rotate, and the crank of the crankshaft 10 drives the movable vortex disc 2 to move, so that the movable vortex disc 2 moves in a translational motion around the center of the crankshaft 10 with a fixed radius under the anti-rotation limit of the cross slip ring 12. The refrigerant entering from the air suction pipe 14 is sucked into a crescent air suction cavity formed by the movable vortex disk 2 and the fixed vortex disk 1, is discharged from an exhaust hole of the fixed vortex disk 1 after being compressed, enters into a containing cavity between the upper cover 13 and the fixed vortex disk 1, enters into a containing cavity between the upper bracket 3 and the motor 4 through an exhaust groove of the fixed vortex disk 1 and the upper bracket 3, enters into the lower end of the motor 4 through a ventilation groove between the motor 4 and the shell 5, and finally, the high-pressure exhaust refrigerant is discharged through an exhaust pipe.

In the operation of the scroll compressor of the present application, as shown in fig. 4 and 5, the low-temperature refrigerant sucked from the suction pipe 14 enters the suction chamber 100, and 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, so as to cool the orbiting scroll base plate 205, thereby being beneficial to reducing the thermal deformation of the orbiting scroll base plate 205 caused by the excessively high exhaust temperature, and avoiding the adhesive wear generated by the thermal deformation contact between the scroll teeth of the fixed scroll and the bottom 206 of the orbiting scroll base plate 205205, so as to improve the reliability of the compressor.

In addition, the thermal deformation of the movable vortex plate substrate 205 is reduced, the leakage problem caused by the conventional means of increasing the gap between the tooth bottom of the movable vortex plate 2 and the tooth top of the fixed vortex plate 1 is solved, the design of a small gap of the vortex tooth bottom is facilitated, and the leakage is reduced, so that the energy efficiency of the compressor is improved.

The pump body structure with the cooling function provided by the application adopts low-temperature air suction to cool the movable vortex plate substrate, so that the aim of reducing the thermal deformation of the movable vortex plate substrate is fulfilled, and the reliability of the compressor is improved.

It is easy to understand by those skilled in the art that the above embodiments can be freely combined and overlapped without conflict.

The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application. The foregoing is merely a preferred embodiment of the present application, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present application, and these modifications and variations should also be regarded as the scope of the application.

Claims (10)

1. A pump body assembly, comprising:

An orbiting scroll base plate (205) comprising a first side and a second side disposed opposite each other, the first side for providing a scroll wrap (204);

The fixed vortex disc (1), the fixed vortex disc (1) and the first side face are closely connected to form an air suction cavity (100);

A cover plate (15) buckled on the second side surface to form a sealing cavity (201); the sealing cavity (201) is provided with an inlet and an outlet communicated with the air suction cavity (100).

2. The pump body assembly of claim 1, wherein:

At least two axial through holes for conducting the first side face and the second side face are formed in the movable vortex plate base plate (205), one end of at least one axial through hole is communicated with the sealing cavity (201), and the other end of at least one axial through hole is communicated with the air suction cavity (100).

3. The pump body assembly of claim 2, wherein:

One end of part of the axial through hole is always communicated with the sealing cavity (201), and the other end of the axial through hole moves along with the movable vortex plate base plate (205) to be communicated with the suction cavity (100) intermittently.

4. A pump body assembly according to claim 2 or 3, wherein:

All the axial through holes are positioned at one end of the first side surface, extend and are penetratingly arranged in the vortex teeth (204).

5. The pump body assembly of claim 4, wherein:

The scroll wrap (204) provided with the axial through hole is located furthest from the center of the orbiting scroll base plate (205).

6. The pump body assembly of claim 5, wherein:

The axial through hole is provided with two: a first through hole (203) and a third through hole (207), wherein the first through hole (203) and the third through hole (207) are arranged in the vortex tooth (204) at intervals; the third through hole (207) is always communicated with the air suction cavity (100), and the first through hole (203) is intermittently communicated with the air suction cavity (100).

7. The pump body assembly of claim 6, wherein:

the distance between the first through hole (203) and the center of the movable scroll base plate (205) is smaller than the distance between the third through hole (207) and the center of the movable scroll base plate (205), and the scroll teeth (204) are arranged in a step shape at the position where the third through hole (207) is arranged, so that the axial length of the third through hole (207) is smaller than the axial length of the first through hole (203).

8. The pump body assembly of any of claims 2-3 or 6-7, wherein:

The second side face is provided with a groove, and the cover plate (15) is in sealing buckling with the groove to form the sealing cavity (201); and the side wall of the groove is provided with at least two second through holes (202) extending in the radial direction, and all the second through holes (202) are respectively communicated with the axial through holes in a one-to-one correspondence manner.

9. The pump body assembly of claim 8, wherein:

The sealing cavity (201) is close to the center of the movable vortex plate substrate (205) relative to the second through hole (202), the second through hole (202) extends out of the periphery of the movable vortex plate substrate (205) along the radial direction, and a sealing pin (17) is inserted into the part, close to the periphery, of the second through hole (202); the axial through hole is communicated with the middle part of the second through hole (202).

10. A scroll compressor comprising a pump assembly as claimed in any one of claims 1 to 9.