A structure of air injection and liquid injection for electric scroll compressor used in freezing and refrigeration

Abstract

This invention discloses a gas injection and liquid replenishment structure for an electric scroll compressor used in refrigeration and freezing, comprising a compressor assembly, a moving and stationary plate assembly, and a gas injection assembly. The compressor assembly consists of the moving and stationary plate assembly, a liquid injection cover, and a rear cover. A liquid injection cover is fixedly connected to one side of the first stationary plate in the moving and stationary plate assembly, and a rear cover is fixedly connected to one side of the liquid injection cover. An exhaust port is provided on the first stationary plate. In this invention, liquid refrigerant introduced from the economizer enters the second chamber. When the pressure difference within the chamber exceeds the elastic force of the valve plate, the refrigerant enters the gas injection port through the gas channel, thereby entering the first stationary plate to cool and replenish the moving and stationary plate assembly, increasing the refrigerant enthalpy, improving the cooling capacity, and thus reducing the compressor's operating temperature and improving operating efficiency. The valve plate surface has pits etched around the air holes, increasing the complexity of the valve plate surface and making it more difficult for gas to leak through tiny gaps, thereby improving the compressor's efficiency.

Description

Technical Field

[0001] This invention relates to the field of scroll compressor technology, specifically to a gas injection and liquid spraying structure for an electric scroll compressor used in refrigeration and freezing. Background Technology

[0002] Scroll compressors have been widely used in automotive air conditioning since their invention. A scroll compressor is a compressible positive displacement compressor consisting of a fixed involute scroll stationary disc and an eccentrically rotating involute scroll moving disc. During the intake, compression, and exhaust processes, the stationary disc is fixed to the outer casing, while the moving disc, driven by an eccentric shaft and constrained by an anti-rotation mechanism, rotates around the center of the stationary disc's base circle with a small radius. Refrigerant is drawn into the intake chambers of the stationary and moving discs. As the power input shaft rotates, the refrigerant is gradually compressed within the continuous crescent-shaped compression chambers formed by the meshing of the stationary and moving discs, and then discharged from the shaft at the center of the stationary disc. The fluid is continuously discharged through the orifice to the rear cover and then discharged through the exhaust channel. The unique structure of the scroll compressor determines its unparalleled efficiency compared to other types of compressors, with a volumetric efficiency of 85% to 95% and high compression energy conversion efficiency, leading to its widespread application. Existing scroll compressors basically meet user needs, but there are still some shortcomings. The unique structure of the scroll compressor results in a high exhaust temperature, which is widely used in heat pumps and cryogenic fields. However, this also leads to high compressor operating temperatures and reduced efficiency, affecting the normal use of the scroll compressor. Therefore, it is necessary to design a gas injection and liquid spraying structure for an electric scroll compressor used in refrigeration and freezing. Summary of the Invention

[0003] The purpose of this invention is to provide a gas injection and liquid spraying structure for an electric scroll compressor used in freezing and refrigeration, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an electric scroll compressor for refrigeration and freezing with a gas injection and liquid spraying structure, comprising a compressor assembly, a moving and stationary plate assembly, and a gas injection assembly. The compressor assembly consists of a moving and stationary plate assembly, a liquid spraying cover, and a rear cover. In the moving and stationary plate assembly, a liquid spraying cover is fixedly connected to one side of a first stationary plate, and a rear cover is fixedly connected to one side of the liquid spraying cover. An exhaust port is provided on the first stationary plate, and a valve plate from the gas injection assembly is fixedly connected to one side of the first stationary plate and the liquid spraying cover. The valve plate and the liquid spraying cover cooperate to form a gas injection chamber, and a valve plate 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 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 the combination of a 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 spray cover, and a second cavity is formed between the cover plate and the spray cover. The second cavity is isolated from the third cavity by the cover plate.

[0008] As a further technical solution of the present invention, the moving and stationary disc assembly consists of a first stationary disc, an air inlet, an exhaust outlet, an air inlet / liquid inlet, a moving disc, a first mounting ear, a first mounting hole, a second mounting ear, and a second mounting hole, with the first stationary disc being connected to the moving disc.

[0009] As a further technical solution of the present invention, the first static plate is provided with a second mounting ear, and a second mounting hole is formed on the second mounting ear.

[0010] As a further technical solution of the present invention, the moving plate is provided with a first mounting ear, the first mounting ear is provided with a first mounting hole, and the moving plate is provided with an air inlet and an air outlet.

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

[0012] As a further technical solution of the present invention, the gas replenishment component consists of a valve plate, a valve disc, a recess, a gas channel and a fixing hole. The valve plate is etched with a recess and a gas channel is provided on the valve plate.

[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: This electric scroll compressor for refrigeration and freezing has a gas injection and liquid spraying structure. Compressed gas from the moving and stationary plate assembly enters the exhaust port and is discharged into the first chamber. The compressed gas then enters the third chamber through a channel and is discharged. Liquid refrigerant introduced from the economizer enters the second chamber, which is isolated from the third chamber by a cover plate to prevent refrigerant from flowing out. The refrigerant entering the second chamber is separated by a valve plate and valve discs. When the pressure difference within the chamber exceeds the elastic force of the valve discs, the refrigerant enters the gas injection and liquid spraying port through the gas channel, thus entering the first stationary plate. The gas injection and liquid spraying port size is 2-3 mm, which cools and injects gas into the moving and stationary plate assembly, increasing... Adding refrigerant enthalpy increases the cooling capacity, thereby reducing the compressor's operating temperature and improving operating efficiency. When the rotating and stationary disc assembly continues to rotate 30°–40° on the main shaft, the intake and exhaust ports can replenish the suction chamber with gas, which is then transferred to the back of the first stationary disc via a channel. The valve plate surface has etched pits around the air holes, with a diameter of 0.1–0.3 mm, a depth of 0.2–0.5 mm, and a spacing of 1.5–2.5 mm. These pits help balance the pressure difference between the high-pressure and low-pressure areas inside the compressor, ensuring stable compressor operation. Simultaneously, the increased complexity of the valve plate surface makes it more difficult for gas to leak through tiny gaps, thus improving compressor efficiency. Attached Figure Description

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

[0016] Figure 2 This is a schematic diagram of the structure of the first static disk in this invention;

[0017] Figure 3 This is a schematic diagram of the structure of the second mounting ear in this invention;

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

[0019] Figure 5 This is a schematic diagram of the air replenishment component in this invention;

[0020] Figure 6 This is a schematic diagram of the valve plate in this invention;

[0021] In the diagram: 1. Compressor assembly; 2. Moving and stationary disc assembly; 3. Air supply assembly; 100. First stationary disc; 101. First chamber; 102. Air supply port; 103. Exhaust port; 105. Third chamber; 200. Liquid spray cover; 201. Second chamber; 202. Air supply chamber; 203. Valve plate; 204. Valve disc; 205. Recess; 206. Cover plate; 207. Gas passage; 208. Fixing hole; 300. Rear cover; 301. Air supply liquid spray port; 302. Moving disc; 303. First mounting ear; 304. First mounting hole; 305. Second mounting ear; 306. Second mounting hole. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see the appendix Figure 1 - Appendix Figure 6The present invention provides an embodiment of an electric scroll compressor for refrigeration and freezing, comprising a compressor assembly 1, a moving and stationary disc assembly 2, and a gas injection assembly 3. The compressor assembly 1 consists of the moving and stationary disc assembly 2, a liquid injection cover 200, and a rear cover 300. The liquid injection cover 200 is fixedly connected to one side of the first stationary disc 100 in the moving and stationary disc assembly 2, and the rear cover 300 is fixedly connected to one side of the liquid injection cover 200. An exhaust port 103 is provided on the first stationary disc 100, and one side of the first stationary disc 100 and the liquid injection cover 200... A valve plate 203 is fixedly connected to the air supply assembly 3. The valve plate 203 and the spray cover 200 cooperate to form an air supply chamber 202. A valve plate 204 is provided on the valve plate 203. A first cavity 101 is formed between the first stationary plate 100 and the spray cover 200. The first cavity 101 communicates with a third cavity 105. The third cavity 105 is formed by combining the spray cover 200 and the rear cover 300. A cover plate 206 is fixedly connected to one side of the spray cover 200. A second cavity is formed between the cover plate 206 and the spray cover 200. 201. The second cavity 201 is isolated from the third cavity 105 by a cover plate 206. The moving and stationary disc assembly 2 consists of a first stationary disc 100, an air inlet 102, an exhaust port 103, an air inlet / liquid spray port 301, a moving 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 moving disc 302. The first stationary disc 100 is provided with a second mounting ear 305, and the second mounting ear 305 has a second mounting hole 306. The moving plate 302 is provided with a first mounting ear 303, and the first mounting ear 303 is provided with a first mounting hole 304. The moving plate 302 is provided with an air inlet 102 and an exhaust port 103. The first stationary plate 100 is provided with an air inlet 102. The air inlet assembly 3 is composed of a valve plate 203, a valve disc 204, a recess 205, a gas channel 207 and a fixing hole 208. The valve plate 203 is etched with a recess 205, and the valve plate 203 is provided with a gas channel 207 and a fixing hole 208.

[0024] Working principle: During use, compressed gas enters the exhaust port 103 through the moving and stationary plate assembly 2 and is discharged into the first chamber 101. The compressed gas then enters the third chamber 105 through the channel and is discharged. Liquid refrigerant introduced from the economizer enters the second chamber 201, which is isolated from the third chamber 105 by the cover plate 206 to prevent refrigerant from flowing out. The refrigerant entering the second chamber 201 is separated by the valve plate 203 and the valve fin 204. When the pressure difference within the chamber exceeds the elasticity of the valve fin 204, the refrigerant enters the gas injection port 301 through the gas channel 207, thus entering the first stationary plate 100. The gas injection port 301 has a size of 2-3 mm, cooling and replenishing the moving and stationary plate assembly 2, increasing the refrigerant enthalpy, improving the cooling capacity, thereby reducing the compressor's operating temperature and improving operating efficiency. When the moving and stationary plate assembly 2 is in the main... When the shaft continues to rotate 30° to 40°, the air inlet 102 and the exhaust outlet 103 can replenish the intake chamber with air, which is then transmitted to the back of the first stationary plate 100 through the channel. The valve plate 203 has pits 205 etched around the air holes on its surface. The pits have 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. These pits help balance the pressure difference between the high-pressure and low-pressure areas inside the compressor, ensuring the stable operation of the compressor. At the same time, the increased complexity of the valve plate 203 surface makes it more difficult for gas to leak through tiny gaps, thereby improving the efficiency of the compressor. To ensure sealing, the etched area of ​​the valve plate 203 is larger than the projected area of ​​the round head on the valve plate 204. At the same time, 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. 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 present 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 its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A gas injection and liquid injection structure for an electric scroll compressor used in refrigeration and freezing, comprising a compressor assembly (1), a moving and stationary plate assembly (2), and a gas injection assembly (3), characterized in that: The compressor assembly (1) consists of a moving and stationary disc assembly (2), a liquid spray cover (200), and a rear cover (300). The liquid spray cover (200) is fixedly connected to one side of the first stationary disc (100) in the moving and stationary disc assembly (2), and the rear cover (300) is fixedly connected to one side of the liquid spray cover (200). The first stationary disc (100) is provided with an exhaust port (103) and a supplementary liquid spray port (301). A valve plate (203) from the supplementary air assembly (3) is fixedly connected to one side of the first stationary disc (100) and the liquid spray cover (200). The valve plate (203) and the liquid spray cover (200) cooperate to form a supplementary air chamber (202), and a valve plate (204) is provided on the valve plate (203). A first cavity (101) is formed between the first stationary disc (100) and the liquid spray cover (200). The first cavity (101) communicates with a third cavity (105). The cavity (105) is formed by combining a spray cover (200) and a rear cover (300); a cover plate (206) is fixedly connected to one side of the spray cover (200), and a second cavity (201) is formed between the cover plate (206) and the spray cover (200). The second cavity (201) is isolated from the third cavity (105) by the cover plate (206); the gas replenishment assembly (3) also includes a recess (205) and a gas channel (207). The valve plate (203) is etched with a recess (205), and the valve plate (203) is provided with a gas channel (207) communicating with the gas replenishment spray port (301); wherein, 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).

2. The gas injection and liquid spraying structure for an electric scroll compressor used in freezing and refrigeration according to claim 1, characterized in that: The moving and stationary disc assembly (2) consists of a first stationary disc (100), an air inlet (102), an exhaust outlet (103), an air inlet / liquid inlet (301), a moving 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 moving disc (302).

3. The gas injection and liquid spraying structure for an electric scroll compressor used in freezing and refrigeration according to claim 2, characterized in that: The first static plate (100) is provided with a second mounting ear (305), and a second mounting hole (306) is provided on the second mounting ear (305).

4. The gas injection and liquid spraying structure for an electric scroll compressor used in freezing and refrigeration according to claim 2, characterized in that: The moving plate (302) is provided with a first mounting ear (303), the first mounting ear (303) is provided with a first mounting hole (304), and the moving plate (302) is provided with an air inlet (102) and an air outlet (103).

5. The gas injection and liquid spraying structure for an electric scroll compressor used in freezing and refrigeration according to claim 3, characterized in that: An air inlet (102) is provided on the first static plate (100).

6. The gas injection and liquid spraying structure for an electric scroll compressor used in freezing and refrigeration according to claim 1, characterized in that: The valve plate (203) has a fixing hole (208).

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