CN218151409U

CN218151409U - Compressor backpressure structure, compressor and vehicle-mounted air conditioning system

Info

Publication number: CN218151409U
Application number: CN202222013061.4U
Authority: CN
Inventors: 不公告发明人
Original assignee: Chongqing Super Force Electric Appliance Co ltd
Current assignee: Chongqing Super Force Electric Appliance Co ltd
Priority date: 2022-08-01
Filing date: 2022-08-01
Publication date: 2022-12-27
Anticipated expiration: 2032-08-01

Abstract

The application provides a compressor back pressure structure, a compressor and a vehicle-mounted air conditioning system, which relate to the field of compressors and comprise a shell, a movable scroll disk and a driving assembly, wherein the movable scroll disk is movably connected with the shell, and a back pressure cavity is defined by the movable scroll disk and the shell together; the driving assembly is arranged in the shell and connected with the movable scroll disk and used for driving the movable scroll disk to do circular motion; the movable scroll disk is provided with a high-pressure cavity and two medium-pressure cavities which are communicated with the high-pressure cavity and symmetrically arranged, a pressure leading hole and two back-pressure holes are formed in the movable scroll disk, the pressure leading hole is communicated with the high-pressure cavity and the back-pressure cavity, one end of each of the two back-pressure holes is communicated with the two medium-pressure cavities, and the other end of each of the two back-pressure holes is communicated with the back-pressure cavity. In the operation process of the compressor, the overturning moment applied to the operation process of the movable scroll disk can be effectively reduced, the operation process of the movable scroll disk is more stable, the vibration and the vibration are not easy to shake, the abrasion is small, and the noise is small.

Description

Compressor backpressure structure, compressor and vehicle-mounted air conditioning system

Technical Field

The utility model relates to a compressor field particularly, relates to a compressor backpressure structure, compressor and on-vehicle air conditioning system.

Background

The compressor is a driven fluid machine for lifting low-pressure gas into high-pressure gas, and is a key component of a refrigeration system. A scroll compressor is a mainstream of a compressor in which a compression mechanism and an electric mechanism are housed in a container, as represented by a so-called hermetic compressor which is capable of reducing noise and facilitating maintenance. In general, a scroll compressor is configured such that a fixed scroll part and an orbiting scroll part are engaged with each other to form a compression chamber therebetween, a wrap is formed by the fixed scroll part and the orbiting scroll part rising from a bottom plate, and when the orbiting scroll part is rotated along a circular orbit while being restricted by a rotation restricting mechanism, a compression chamber is moved while changing a volume to suck, compress, and discharge a refrigerant.

The inventor researches and finds that the back pressure structure of the existing compressor has the following defects:

in the operation process of the compressor, the compression cavity is provided with two medium pressure cavities which are symmetrically arranged, and pressure difference occurs when air pressure in the two medium pressure cavities is inconsistent, so that the stress of the movable scroll is unbalanced, the overturning moment is increased, the abrasion of the movable scroll is accelerated, and shaking and noise easily occur.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a compressor backpressure structure, compressor and on-vehicle air conditioning system, it can reduce the overturning moment, makes the whirlpool dish atress balanced, operates steadily, is difficult for wearing and tearing; and the vibration is small, and the noise is small.

The embodiment of the utility model is realized like this:

in a first aspect, the present invention provides a compressor back pressure structure, including:

the movable scroll disk is movably connected with the casing, and the movable scroll disk and the casing jointly define a back pressure cavity; the driving assembly is arranged in the shell, is connected with the movable scroll disc and is used for driving the movable scroll disc to do circular motion; the movable scroll disk is provided with a high-pressure cavity and two medium-pressure cavities which are communicated with the high-pressure cavity and symmetrically arranged, a pressure leading hole and two back-pressure holes are formed in the movable scroll disk, the pressure leading hole is communicated with the high-pressure cavity and the back-pressure cavity, one end of each of the two back-pressure holes is communicated with the two medium-pressure cavities, and the other end of each of the two back-pressure holes is communicated with the back-pressure cavity.

In an optional embodiment, the back pressure hole includes a first hole section and a second hole section which are communicated, an end of the first hole section far away from the second hole section is communicated with the medium pressure cavity, an end of the second hole section far away from the first hole section is communicated with the back pressure cavity, and the aperture of the first hole section is smaller than that of the second hole section.

In an alternative embodiment, a throttle tube is disposed in the back pressure bore.

In an alternative embodiment, the two back pressure holes are symmetrically arranged.

In an alternative embodiment, one end face of the movable scroll, which faces away from the casing, is provided with a pressure guide groove, and the pressure guide hole is formed in a groove bottom wall of the pressure guide groove.

In an alternative embodiment, the pressure guide groove is provided as an arc-shaped groove extending along the extension direction of the molded line of the movable scroll.

In an alternative embodiment, a bearing seat is arranged at one end of the movable scroll close to the casing, and the two back pressure holes are arranged through the bearing seat.

In an optional embodiment, the driving assembly includes a motor, a main bearing, a driven bearing, an eccentric pin, and a counterweight balance block, the motor and the main bearing are both connected to the casing, an output shaft of the motor is inserted into the main bearing, the driven bearing is connected to the movable scroll, the counterweight balance block is connected to the output shaft through the eccentric pin, and the counterweight balance block is inserted into the driven bearing.

In an optional embodiment, the casing is provided with a plurality of anti-rotation pins, the movable scroll disk is provided with a plurality of assembling grooves, each assembling groove is embedded with one anti-rotation ring, the anti-rotation pins are inserted into the corresponding anti-rotation rings, and the anti-rotation pins are used for guiding the anti-rotation rings to move.

In a second aspect, the present invention provides a compressor, the compressor comprising:

the compressor back pressure structure of any one of the preceding embodiments.

A third aspect, the utility model provides an on-vehicle air conditioning system, on-vehicle air conditioning system includes:

the compressor back pressure structure according to the foregoing embodiment.

The embodiment of the utility model provides a beneficial effect is:

in summary, in the back pressure structure of the compressor provided in this embodiment, the movable scroll is provided with two back pressure holes, one end of each of the two back pressure holes is respectively communicated with the two middle pressure cavities, and the other end of each of the two back pressure holes is communicated with the back pressure cavity, so that, in the operation process of the compressor, after a refrigerant enters the low pressure cavity, the refrigerant moves towards the middle pressure cavity and the high pressure cavity under the cooperation of the movable scroll and the static scroll, and is compressed in the high pressure cavity, the pressure of the refrigerant in the high pressure cavity is high, and flows from the back pressure holes to the back pressure cavity, so that the pressure of the back pressure cavity is increased, the refrigerant in the back pressure cavity respectively flows back into the two middle pressure cavities from the two back pressure holes, and gas backflow flows back in the two middle pressure cavities, thereby ensuring that the pressure change in the two middle pressure cavities is small, the pressure difference is small, the stress of the movable scroll is more balanced, the overturning moment is reduced, the stability in the operation process of the movable scroll is high, the transitional wear is not easily generated, and the service life is long. Meanwhile, the movable scroll disk has stable operation, small vibration, small noise and excellent performance of the whole machine.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic cross-sectional structural view of a back pressure structure of a compressor according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of the orbiting scroll according to the embodiment of the present invention.

Icon:

100-a housing; 110-a cylinder; 120-end plate; 130-anti-rotation pin; 200-moving vortex disc; 201-a tray body; 202-a scroll body; 203-a bearing seat; 204-anti-rotation ring; 210-a high pressure chamber; 220-a medium pressure chamber; 230-a pressure-leading hole; 240-back pressure hole; 250-a pressure guide groove; 300-a drive assembly; 310-a motor; 320-a main bearing; 330-driven bearing; 340-eccentric pin; 350-a counterweight block; 400-Back pressure Chamber.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are usually placed when used, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element indicated must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the prior art, a return pressure hole is formed in a movable scroll and communicated with a back pressure cavity and a compression cavity. In the operation process of the compressor, gas in the back pressure cavity flows back to the compression cavity from the back pressure hole, and the compression cavity is provided with two middle pressure cavities which are symmetrically arranged in the operation process of the compressor, and the back pressure hole only introduces the gas into one of the two middle pressure cavities, so that the gas pressures of the two middle pressure cavities are unequal, the pressure difference is large, the stress on the movable scroll disk is unbalanced, the pressure on the movable scroll disk at the middle pressure cavity where the gas flows back is large, the movable scroll disk is inclined, and the abrasion of the corresponding part is increased; meanwhile, the dynamic scroll disk is unbalanced in stress, the vibration is increased in the rotation process, the noise is increased, and the performance of the whole compressor is reduced.

In view of this, the designer has designed a compressor backpressure structure, can effectively reduce the moment of overturning that moves vortex disk 200 and receive in the operation, makes the operation of moving vortex disk 200 more steady, and difficult shake and vibration are worn and torn little, and the noise is little.

Referring to fig. 1 and 2, in the present embodiment, the back pressure structure of the compressor includes a casing 100, an orbiting scroll 200 and a driving assembly 300, the orbiting scroll 200 is movably connected to the casing 100, and the orbiting scroll 200 and the casing 100 together define a back pressure chamber 400; the driving assembly 300 is disposed in the casing 100, and the driving assembly 300 is connected to the orbiting scroll 200 and is used for driving the orbiting scroll 200 to perform a circular motion; the orbiting scroll 200 has a high pressure chamber 210 and two middle pressure chambers 220 which are both communicated with the high pressure chamber 210 and symmetrically arranged, the orbiting scroll 200 is provided with a pressure guide hole 230 and two back pressure holes 240, the pressure guide hole 230 is communicated with the high pressure chamber 210 and the back pressure chamber 400, one end of each of the two back pressure holes 240 is respectively communicated with the two middle pressure chambers 220, and the other end is communicated with the back pressure chamber 400.

The working principle of the back pressure structure of the compressor provided by the embodiment is as follows:

by arranging the two back pressure holes 240 on the movable scroll disk 200, one ends of the two back pressure holes 240 are respectively communicated with the two middle pressure cavities 220, and the other ends of the two back pressure holes 240 are respectively communicated with the back pressure cavity 400, so that after a refrigerant enters the low pressure cavity in the operation process of the compressor, the refrigerant moves towards the middle pressure cavity 220 and the high pressure cavity 210 under the matching of the movable scroll disk 200 and the fixed scroll disk, and is compressed in the high pressure cavity 210, the pressure of the refrigerant in the high pressure cavity 210 is high, the refrigerant in the high pressure cavity 210 can enter the back pressure holes 240 from the gap between the matching surfaces of the movable scroll disk 200 and the fixed scroll disk, and flows to the back pressure cavity 400 from the back pressure holes 240, so that the pressure change in the two middle pressure cavities 220 is small, the pressure difference is small, the movable scroll disk 200 is more balanced in stress, the overturning moment is reduced, the stable abrasion in the operation process of the movable scroll disk 200 is not easy to generate transition, and the service life is long. Meanwhile, the movable scroll 200 has stable operation, small vibration, small noise and excellent overall performance.

In this embodiment, optionally, the orbiting scroll 200 includes a disc 201 and a scroll body 202, the scroll body 202 is fixedly connected to one side of the disc 201, and a bearing seat 203 is disposed on the other side of the disc 201. The scroll body 202 has a spiral end surface facing away from the disk body 201, a pressure guide groove 250 is arranged at a position of the spiral end surface close to the center, the pressure guide groove 250 is arranged as an arc-shaped groove, and the pressure guide groove 250 extends along the extending direction of the scroll body 202. The pilot hole 230 is provided on the groove bottom wall of the pilot groove 250, and the pilot hole 230 may be a circular hole. The pilot hole 230 penetrates both the scroll body 202 and the disk body 201. By providing the pressure introduction groove 250, the gas in the high pressure chamber 210 is facilitated to enter the guide hole from the pressure introduction groove 250, and thus, the back pressure chamber 400. Simultaneously, disk body 201 and bearing frame 203 setting are all run through simultaneously to two back pressure hole 240, and every back pressure hole 240 is including the first hole section and the second hole section of intercommunication, and first hole section and second hole section are the circular port, and the cross section profile of also first hole section and second hole section is circular, and the aperture of first hole section is less than the aperture of second hole section, and, the one end and the middling pressure chamber 220 intercommunication of second hole section are kept away from to first hole section, and the one end and the backpressure chamber 400 intercommunication of first hole section are kept away from to the second hole section. By the design, the first hole section has the throttling function, the second hole section is large in hole diameter, processing and manufacturing are facilitated, and processing and manufacturing cost is reduced.

In other embodiments, the back pressure hole 240 may be provided as a constant diameter hole, and then a throttle pipe may be provided in the back pressure hole 240 to perform a throttling function through the throttle pipe.

In addition, the number of the back pressure holes 240 is two, and in order to better match with the two middle pressure cavities 220, the two back pressure holes 240 are arranged in a central symmetry manner, so that the gas in the back pressure cavity 400 enters the two middle pressure cavities 220 from the two back pressure holes 240, the pressure change in the middle pressure cavities 220 is smaller, and the operation of the movable scroll 200 is more stable.

Further, one side of the disk body 201 departing from the scroll body 202 is provided with a plurality of assembling grooves, the assembling grooves are evenly distributed in the circumferential direction of the disk body 201 at intervals, each assembling groove is provided with an anti-rotation ring 204, and the anti-rotation rings 204 are wear-resistant parts, so that the wear speed is reduced.

Referring to fig. 1, in the present embodiment, optionally, the casing 100 includes a cylinder 110 and an end plate 120 connected to each other, and the end plate 120 is located at one end of the cylinder 110 and is of a concave structure. The middle part of the end plate 120 is provided with a positioning hole. One side of the end plate 120, which is away from the cylinder 110, is provided with a plurality of anti-rotation pins 130, the plurality of anti-rotation pins 130 are uniformly arranged around the axis of the positioning hole at intervals, the number of the anti-rotation pins 130 is equal to that of the anti-rotation rings 204, and the anti-rotation pins 130 are correspondingly inserted into the anti-rotation rings 204 one by one, so that the anti-rotation rings 204 can be guided to rotate, and the movement path of the movable scroll 200 can be determined. In the rotation process of the orbiting scroll 200, the outer circumferential surface of the anti-rotation pin 130 is attached to the inner circumferential surface of the anti-rotation ring 204, and both the anti-rotation ring 204 and the anti-rotation pin 130 may be made of a wear-resistant material, thereby reducing the wear rate.

Referring to fig. 1, in the present embodiment, the driving assembly 300 optionally includes a motor 310, a main bearing 320, a driven bearing 330, an eccentric pin 340, and a counterweight. The motor 310 and the main bearing 320 are both connected to the casing 100, the motor 310 is fixed in the area enclosed by the cylinder 110, and the main bearing 320 is fixed on the side of the end plate 120 facing away from the cylinder 110. An output shaft of the motor 310 penetrates through the positioning hole and is arranged in the main bearing 320 in a penetrating mode, the driven bearing 330 is connected with the bearing seat 203 on the movable scroll 200, the counterweight balance block 350 is connected with the output shaft through the eccentric pin 340, and the counterweight balance block 350 is inserted into the driven bearing 330 in a plugging mode. Thus, after the motor 310 is started, the eccentric pin 340 drives the counterweight balance block 350 to move, so as to drive the orbiting scroll 200 to move circumferentially, and the orbiting scroll 200 and the fixed scroll cooperate to pressurize the refrigerant.

The compressor back pressure structure that this embodiment provided, because all there is the gas reflux in two middling pressure chambeies 220 to it is little to have guaranteed that the pressure variation in two middling pressure chambeies 220, and pressure differential is little, moves vortex disk 200 atress more balanced, reduces the moment of toppling, and it is high to move vortex disk 200 operation in-process stationarity, is difficult for producing transition wearing and tearing, long service life. Meanwhile, the movable scroll 200 has stable operation, small vibration, small noise and excellent overall performance.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A compressor back pressure structure, comprising:

2. The compressor back pressure structure as set forth in claim 1, wherein:

the back pressure hole comprises a first hole section and a second hole section which are communicated, the first hole section is far away from one end of the second hole section and communicated with the medium pressure cavity, the second hole section is far away from one end of the first hole section and communicated with the back pressure cavity, and the aperture of the first hole section is smaller than that of the second hole section.

3. The compressor back pressure structure as set forth in claim 1, wherein:

the two back pressure holes are symmetrically arranged.

4. The compressor back pressure structure as set forth in claim 1, wherein:

and a pressure guide groove is formed in one end face, deviating from the shell, of the movable scroll disc, and the pressure guide hole is formed in the groove bottom wall of the pressure guide groove.

5. The compressor back pressure structure of claim 4, wherein:

the pressure guide groove is an arc-shaped groove extending along the extension direction of the molded line of the movable scroll disk.

6. The compressor back pressure structure as set forth in claim 1, wherein:

and a bearing seat is arranged at one end of the movable scroll disc close to the casing, and the two back pressure holes penetrate through the bearing seat.

7. The compressor back pressure structure according to any one of claims 1 to 6, wherein:

the drive assembly comprises a motor, a main bearing, a driven bearing, an eccentric pin and a counterweight balance block, wherein the motor and the main bearing are connected with the shell, an output shaft of the motor penetrates through the main bearing, the driven bearing is connected with the movable scroll disk, the counterweight balance block is connected with the output shaft through the eccentric pin, and the counterweight balance block is inserted in the driven bearing.

8. The compressor back pressure structure of claim 7, wherein:

the anti-rotation scroll comprises a casing and is characterized in that a plurality of anti-rotation pins are arranged on the casing, the movable scroll is provided with a plurality of assembly grooves, an anti-rotation ring is embedded in each assembly groove, the anti-rotation pins are inserted in the corresponding anti-rotation rings, and the anti-rotation pins are used for guiding the anti-rotation rings to move.

9. A compressor, characterized in that the compressor comprises:

the compressor back pressure structure as set forth in any one of claims 1 to 8.

10. An on-vehicle air conditioning system, characterized in that, the on-vehicle air conditioning system includes:

the compressor back pressure structure of claim 9.