Air supplementing and liquid spraying structure of electric scroll compressor for freezing and refrigerating

Abstract

The electric scroll compressor air supplementing and liquid spraying structure comprises a compressor assembly, a dynamic and static disc assembly and an air supplementing assembly, the compressor assembly is composed of the dynamic and static disc assembly, a liquid spraying cover and a rear cover, one side of a first static disc in the dynamic and static disc assembly is fixedly connected with the liquid spraying cover, and one side of the liquid spraying cover is fixedly connected with the rear cover; an exhaust port is formed in the first static disc; refrigerant liquid introduced from an economizer enters the second cavity, and when the pressure difference in the cavity is larger than the elastic force of the valve plate, the refrigerant enters the air supplementing liquid spraying opening through the air channel, so that the refrigerant enters the first static disc, cooling and air supplementing are conducted on the dynamic and static disc assembly, the enthalpy value of the refrigerant is increased, the refrigerating capacity is improved, and therefore the working temperature of the compressor is reduced; the operation efficiency is improved; the pits are etched around the air holes in the surface of the valve plate, so that the complexity of the surface of the valve plate is increased, gas is more difficult to leak through tiny gaps, and the efficiency of the compressor is improved.

Description

Technical Field

[0001] The invention relates to the technical field of scroll compressors, in particular to an air replenishing and liquid spraying structure of an electric scroll compressor used for refrigeration. Background Art

[0002] Since its invention, scroll compressors have been widely used in the field of automotive air conditioning. Scroll compressors are compressible positive displacement compressors consisting of a fixed involute scroll stator and an eccentrically swirling and translating involute scroll moving disk. During the suction, compression and exhaust working process, the stator is fixed on the shell, and the moving disk is driven by the eccentric shaft and restrained by the anti-self-rotation mechanism. It rotates in a plane with a very small radius around the center of the stator base circle. The refrigerant is sucked into the suction cavity of the moving and stationary disks. As the power input shaft rotates, the refrigerant is gradually compressed in the continuous crescent-shaped compression cavity formed by the meshing of the moving and stationary disks, and then is discharged by the axis at the center of the stator. The air is continuously discharged to the rear cover through the hole and discharged through the exhaust channel. The unique structure of the scroll compressor determines the efficiency that is unmatched by other types of compressors. Its volumetric efficiency is between 85% and 95%, and its compression energy conversion efficiency is high, so it is widely used. The existing scroll compressors basically meet user needs, but there are still certain shortcomings. The unique structure of the scroll compressor leads to its high exhaust temperature. It is widely used in heat pump and low-temperature fields, but it also brings about high operating temperature of the compressor and reduced efficiency, which affects the normal use of the scroll compressor. Therefore, it is necessary to design an electric scroll compressor air replenishment and liquid injection structure for refrigeration. Summary of the invention

[0003] The object of the present invention is to provide an air replenishing and liquid spraying structure for an electric scroll compressor used for refrigeration and freezing, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an electric scroll compressor air-inflation and liquid-spraying structure for refrigeration and freezing, comprising a compressor assembly, a dynamic and static disk assembly and an air-inflation assembly, wherein the compressor assembly is composed of a dynamic and static disk assembly, a liquid-spraying cover and a back cover, a first static disk in the dynamic and static disk assembly is fixedly connected to a liquid-spraying cover on one side, a liquid-spraying cover is fixedly connected to a back cover on one side, an exhaust port is provided on the first static disk, and a valve plate in the air-inflation assembly is fixedly connected to one side of the first static disk and the liquid-spraying cover, an air-inflation chamber is formed between the valve plate and the liquid-spraying cover, and a valve sheet is provided on the valve plate.

[0005] As a further technical solution of the present invention, a first cavity is formed between the first static plate and the liquid spray cover.

[0006] As a further technical solution of the present invention, the first cavity is connected to the third cavity, and the third cavity is formed by a combination of a liquid spray cover and a rear cover.

[0007] As a further technical solution of the present invention, a cover plate is fixedly connected to one side of the liquid spray cover, a second cavity is formed between the cover plate and the liquid spray cover, and the second cavity is isolated from the third cavity by the cover plate.

[0008] As a further technical solution of the present invention, the dynamic and static disc assembly consists of a first static disc, an air supply port, an air supply port, an air supply liquid spray port, a dynamic disc, a first mounting ear, a first mounting hole, a second mounting ear and a second mounting hole, and the first static disc is connected to the dynamic disc.

[0009] As a further technical solution of the present invention, a second mounting ear is provided on the first stator disk, and a second mounting hole is provided on the second mounting ear.

[0010] As a further technical solution of the present invention, a first mounting ear is provided on the movable disc, a first mounting hole is provided on the first mounting ear, and an air supply port and an air exhaust port are provided on the movable disc.

[0011] As a further technical solution of the present invention, an air supply port is provided on the first static disk.

[0012] As a further technical solution of the present invention, the gas replenishing component is composed of a valve plate, a valve sheet, a pit, a gas channel and a fixing hole, the valve plate is etched with a pit, and the valve plate is provided with a gas channel.

[0013] As a further technical solution of the present invention, a fixing hole is provided on the valve plate.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the air-inflation and liquid-inflation structure of the electric scroll compressor for refrigeration and freezing enters the exhaust port through the dynamic and static disk assembly to compress the gas and discharge it into the first cavity; the compressed gas enters the third cavity through the channel and is discharged; the refrigerant liquid introduced from the economizer enters the second cavity, and is isolated from the third cavity by the cover plate to prevent the refrigerant from flowing out of the third cavity; the refrigerant entering the second cavity is separated by the valve plate and the valve sheet; when the pressure difference in the cavity is greater than the elastic force of the valve sheet, the refrigerant enters the air-inflation and liquid-inflation port through the gas channel, thereby entering the first static disk; the size of the air-inflation and liquid-inflation port is 2 to 3 mm, the dynamic and static disk assembly is cooled and air-inflated, and the cooling effect is improved. The enthalpy value of the refrigerant is increased, the cooling capacity is increased, thereby reducing the operating temperature of the compressor and improving the operating efficiency; the air supply port and the exhaust port can supply air to the suction chamber only when the dynamic and static disk assembly continues to rotate 30° to 40° on the main shaft, and transmit it to the back of the first static disk through the channel; pits are etched around the air holes on the surface of the valve plate, with a diameter of 0.1 to 0.3mm, a depth of 0.2 to 0.5mm, and a spacing of 1.5 to 2.5mm, which help balance the pressure difference between the high-pressure and low-pressure areas inside the compressor and ensure the stable operation of the compressor; at the same time, the complexity of the valve plate surface is increased, making it more difficult for gas to leak through tiny gaps, thereby improving the efficiency of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0016] Figure 2 It is a structural schematic diagram of the first static disk in the present invention;

[0017] Figure 3 is a schematic structural diagram of the second mounting ear in the present invention;

[0018] Figure 4 It is a structural schematic diagram of the moving disk in the present invention;

[0019] Figure 5 It is a structural schematic diagram of the gas replenishing component in the present invention;

[0020] Figure 6 It is a structural schematic diagram of the valve plate in the present invention;

[0021] In the figure: 1. compressor assembly; 2. dynamic and static disk assembly; 3. air supply assembly; 100. first static disk; 101. first cavity; 102. air supply port; 103. exhaust port; 105. third cavity; 200. liquid spray cover; 201. second cavity; 202. air supply cavity; 203. valve plate; 204. valve plate; 205. pit; 206. cover plate; 207. gas channel; 208. fixing hole; 300. back cover; 301. air supply spray port; 302. dynamic disk; 303. first mounting ear; 304. first mounting hole; 305. second mounting ear; 306. second mounting hole. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Please see attached Figure 1 -Attached Figure 6The present invention provides an embodiment: an electric scroll compressor air-injection liquid-spraying structure for refrigeration, comprising a compressor assembly 1, a dynamic and static disk assembly 2 and an air-injection assembly 3, wherein the compressor assembly 1 is composed of a dynamic and static disk assembly 2, a liquid-spraying cover 200 and a rear cover 300, wherein one side of the first static disk 100 in the dynamic and static disk assembly 2 is fixedly connected to the liquid-spraying cover 200, and one side of the liquid-spraying cover 200 is fixedly connected to the rear cover 300, and an exhaust port 103 is provided on the first static disk 100, and one side of the first static disk 100 and the liquid-spraying cover 200 The valve plate 203 in the air replenishing component 3 is fixedly connected, and the valve plate 203 and the liquid spraying cover 200 cooperate to form an air replenishing cavity 202, and a valve plate 204 is arranged on the valve plate 203. A first cavity 101 is formed between the first static disk 100 and the liquid spraying cover 200. The first cavity 101 is interconnected with the third cavity 105. The third cavity 105 is formed by the combination of the liquid spraying cover 200 and the rear cover 300. A cover plate 206 is fixedly connected to one side of the liquid spraying cover 200, and a second cavity is formed between the cover plate 206 and the liquid spraying cover 200. 201, the second cavity 201 is isolated from the third cavity 105 by a cover plate 206, the dynamic and static disc assembly 2 is composed of a first static disc 100, an air supply port 102, an exhaust port 103, an air supply liquid injection port 301, a dynamic disc 302, a first mounting ear 303, a first mounting hole 304, a second mounting ear 305 and a second mounting hole 306, the first static disc 100 is connected to the dynamic disc 302, the first static disc 100 is provided with a second mounting ear 305, and the second mounting ear 305 is provided with a second mounting hole 306 A first mounting ear 303 is provided on the moving disk 302, a first mounting hole 304 is opened on the first mounting ear 303, a gas supply port 102 and an exhaust port 103 are opened on the moving disk 302, a gas supply port 102 is opened on the first static disk 100, and the gas supply component 3 is composed of a valve plate 203, a valve sheet 204, a pit 205, a gas channel 207 and a fixing hole 208, a pit 205 is etched on the valve plate 203, a gas channel 207 is opened on the valve plate 203, and a fixing hole 208 is opened on the valve plate 203.

[0024] Working principle: When in use, the compressed gas enters the exhaust port 103 through the dynamic and static disk assembly 2 and is then discharged into the first cavity 101. The compressed gas enters the third cavity 105 through the channel and is then discharged. The refrigerant liquid introduced from the economizer enters the second cavity 201 and is isolated from the third cavity 105 by the cover plate 206 to prevent the refrigerant from flowing out of the third cavity 105. The refrigerant entering the second cavity 201 is separated by the valve plate 203 and the valve sheet 204. When the pressure difference in the cavity is greater than the elastic force of the valve sheet 204, the refrigerant enters the air replenishment liquid injection port 301 through the gas channel 207, and then enters the first static disk 100. The size of the air replenishment liquid injection port 301 is 2 to 3 mm, which cools and replenishes the dynamic and static disk assembly 2, increases the refrigerant enthalpy, and increases the cooling capacity, thereby reducing the operating temperature of the compressor and improving the operating efficiency. When the dynamic and static disk assembly 2 is in the main The air supply port 102 and the air exhaust port 103 can supply air to the suction chamber only when the shaft continues to rotate 30° to 40°, and transmit the air to the back of the first static disk 100 through the channel; pits 205 are etched around the air holes on the surface of the valve plate 203, with a diameter of 0.1 to 0.3 mm, a depth of 0.2 to 0.5 mm, and a spacing of 1.5 to 2.5 mm, which helps to balance the pressure difference between the high-pressure and low-pressure areas inside the compressor and ensure the stable operation of the compressor; at the same time, the complexity of the surface of the valve plate 203 is increased, making it more difficult for the gas to leak through tiny gaps, thereby improving the efficiency of the compressor; in order to ensure the sealing performance, the etching range of the valve plate 203 is larger than the projected area of ​​the round head on the valve plate 204, and the diameter of the round head on the valve plate 204 is larger than the diameter of the gas channel 207 on the valve plate 203, and the diameter of the gas channel 207 is 2 to 3 mm.

[0025] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An air-injection and liquid-injection structure for an electric scroll compressor used in refrigeration and freezing, comprising a compressor assembly (1), a dynamic and static disk assembly (2) and an air-injection assembly (3), characterized in that: The compressor assembly (1) is composed of a dynamic and static disk assembly (2), a liquid spray cover (200) and a rear cover (300); one side of the first static disk (100) in the dynamic and static disk assembly (2) is fixedly connected to the liquid spray cover (200); one side of the liquid spray cover (200) is fixedly connected to the rear cover (300); an exhaust port (103) is provided on the first static disk (100); one side of the first static disk (100) and the liquid spray cover (200) is fixedly connected to a valve plate (203) in an air replenishing assembly (3); the valve plate (203) and the liquid spray cover (200) cooperate to form an air replenishing cavity (202); and a valve plate (204) is provided on the valve plate (203).

2. The air-supplementing and liquid-spraying structure of an electric scroll compressor for refrigeration and freezing according to claim 1, characterized in that: A first cavity (101) is formed between the first static plate (100) and the liquid spray cover (200).

3. The air-supplementing and liquid-spraying structure of an electric scroll compressor for refrigeration and freezing according to claim 2, characterized in that: The first cavity (101) is connected to the third cavity (105), and the third cavity (105) is formed by combining a liquid spray cover (200) and a rear cover (300).

4. The air-supplementing and liquid-spraying structure of an electric scroll compressor for refrigeration and freezing according to claim 3, characterized in that: A cover plate (206) is fixedly connected to one side of the liquid spray cover (200), a second cavity (201) is formed between the cover plate (206) and the liquid spray cover (200), and the second cavity (201) is isolated from the third cavity (105) by the cover plate (206).

5. The air-supplementing and liquid-spraying structure of an electric scroll compressor for refrigeration and freezing according to claim 1, characterized in that: The movable and stationary disc assembly (2) is composed of a first stationary disc (100), an air supply port (102), an air supply port (103), an air supply liquid injection port (301), a movable disc (302), a first mounting ear (303), a first mounting hole (304), a second mounting ear (305) and a second mounting hole (306); the first stationary disc (100) is connected to the movable disc (302).

6. The air-supplementing and liquid-spraying structure of an electric scroll compressor for refrigeration and freezing according to claim 5, characterized in that: The first static disk (100) is provided with a second mounting ear (305), and the second mounting ear (305) is provided with a second mounting hole (306).

7. The air-supplementing and liquid-spraying structure of an electric scroll compressor for refrigeration and freezing according to claim 5, characterized in that: The movable disc (302) is provided with a first mounting ear (303), the first mounting ear (303) is provided with a first mounting hole (304), and the movable disc (302) is provided with an air supply port (102) and an air exhaust port (103).

8. The air-supplementing and liquid-spraying structure of an electric scroll compressor for refrigeration and freezing according to claim 6, characterized in that: The first static plate (100) is provided with an air supply port (102).

9. The air-supplementing and liquid-spraying structure of an electric scroll compressor for refrigeration and freezing according to claim 1, characterized in that: The gas replenishing component (3) is composed of a valve plate (203), a valve sheet (204), a pit (205), a gas channel (207) and a fixing hole (208); the pit (205) is etched on the valve plate (203), and the gas channel (207) is opened on the valve plate (203).

10. The air-supplementing and liquid-spraying structure of an electric scroll compressor for refrigeration and freezing according to claim 9, characterized in that: The valve plate (203) is provided with a fixing hole (208).

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