Electric scroll compressor for freezing and refrigerating

Abstract

The electric scroll compressor comprises a front cover, a motor stator, a main shaft, a motor rotor, an oil absorption channel, a cylinder body, a liquid containing cavity, an overflow channel, a first channel, a movable disc assembly, a first cavity, a second channel, a third channel, a static disc assembly, a rear cover and a buffer cavity. A second channel is formed in the position, corresponding to the movable scroll plate, of the outer wall of one side of the first base plate, and a third channel is formed in the inner wall of the second cavity; the liquid containing cavity is formed in the compressor and used for containing the separated liquid refrigerant and lubricating oil, oil mist is formed through rotation and stirring of the motor rotor and enters the compressor, and therefore the problem caused by refrigerant liquefaction at the low temperature is solved, and meanwhile when the compressor stops or defrosts, the liquid refrigerant firstly enters the liquid containing cavity and then enters the lubricating oil. And the liquid refrigerant is partially gasified or atomized, so that the possibility that the liquid refrigerant directly enters the air suction cavity to be compressed is reduced, and the liquid impact resistance of the compressor is improved.

Description

Technical Field

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

[0002] Since its invention, scroll compressors have been widely used in the field of automotive air-conditioning. Scroll compressors are compressible volume compressors composed 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 outer casing, and the moving disk is driven by the eccentric shaft and restrained by the anti-rotation mechanism, and rotates in a plane with a very small radius around the center of the base circle of the stator; the refrigerant is sucked into the suction cavity of the moving and stator 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 stator disks, and then continuously discharged from the axial hole in the center of the stator disk to the rear cover 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.

[0003] Existing scroll compressors have the following defects: First, in the extremely low temperature environment of freezing and refrigeration, the compatibility between the physical properties of the refrigerant and the lubricating oil will be significantly reduced. This reduction in compatibility may not only lead to poor lubrication inside the compressor, and then cause problems such as compressor overheating and oil shortage, but may also reduce the total amount of refrigerant in the system due to the loss of refrigerant, affecting the refrigeration effect. This series of chain reactions not only reduces the operating efficiency of the compressor, but also poses a threat to the overall stability of the system.

[0004] Second, during the continuous operation of the compressor, the main bearing is a key component, and its lubrication status is directly related to the service life and performance of the compressor. If the lubrication system cannot provide enough lubricating grease, or the fluidity of the grease is limited at low temperatures, the main bearing may suffer from wear due to insufficient lubrication, and in severe cases may even cause compressor failure.

[0005] Third, the liquid refrigerant directly enters the suction chamber of the compressor. The liquid refrigerant expands rapidly inside the compressor, generating a huge impact force and causing a "liquid hammer" phenomenon. Liquid hammer will not only cause physical damage to the precision components inside the compressor, but may also cause more serious mechanical failures, posing a serious threat to the safe operation of the entire refrigeration system.

[0006] Fourth, traditional lubrication methods are difficult to fully play their role when dealing with high-pressure compression ratios. As the compression ratio increases, the load on the bearings also increases, and the demand for lubrication becomes more stringent. Existing lubrication systems often cannot provide sufficient lubrication effects, resulting in increased wear of the bearings under high-pressure ratio conditions and a significant shortening of their lifespan.

[0007] Fifth, the gas flow damping problem is also one of the key factors to be considered in the design of scroll compressors. In order to ensure that the gas inside the compressor can flow smoothly and at the same time form sufficient pressure to meet the refrigeration needs, the gas flow damping must be precisely controlled. Existing scroll compressors are difficult to achieve the ideal damping control effect, which affects the overall performance and efficiency of the compressor. Summary of the invention

[0008] The object of the present invention is to provide an electric scroll compressor for refrigeration and freezing to solve the problems raised in the above background technology.

[0009] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an electric scroll compressor for freezing and refrigeration, comprising a cylinder body, a main shaft is arranged in the cylinder body, an eccentric block is fixedly connected to one end of the main shaft, a moving plate assembly is arranged on one side of the main shaft, the moving plate assembly comprises a first chassis, and the first chassis is arranged in the cylinder body, the main shaft is fixedly connected to the first chassis, a second cavity is opened on the outer wall of one side of the first chassis, a third bearing is fixedly connected in the second cavity, and the main shaft is sleeved in the third bearing, a moving scroll plate is fixedly connected to the outer wall of the other side of the first chassis, a second channel is opened on the outer wall of one side of the first chassis at a position corresponding to the moving scroll plate, a third channel is opened on the inner wall of the second cavity, and the third channel is conductively connected to the second channel, and a second sealing ring is fixedly connected to the outer wall of one side of the first chassis.

[0010] As a further technical solution of the present invention, a liquid containing cavity is arranged in the cylinder body, a first channel is opened on the inner wall of the liquid containing cavity, and an overflow channel is arranged in the gap between the main shaft and the cylinder body in the liquid containing cavity.

[0011] As a further technical solution of the present invention, a first cavity is provided at the gap between the first chassis and the cylinder body, and the first cavity is communicated with the overflow channel.

[0012] As a further technical solution of the present invention, a static disk assembly is arranged on one side of the moving disk assembly, the static disk assembly includes a second chassis, and the second chassis is fixedly connected to the inner wall of the cylinder body, a static scroll disk is fixedly connected to the outer wall of one side of the second chassis, and the moving scroll disk is arranged on the static scroll disk, and a third sealing ring is arranged on the outer wall of one side of the static scroll disk.

[0013] As a further technical solution of the present invention, an air outlet is opened on the outer wall of one side of the second chassis, a check valve is fixedly connected to the air outlet, a pressure relief valve is fixedly connected to the outer wall of one side of the second chassis, a rear cover is provided on one side of the moving plate assembly, a second bolt is sleeved on the outer wall of the rear cover, and the other end of the second bolt is threadedly connected to the cylinder body.

[0014] As a further technical solution of the present invention, a buffer cavity is provided in the rear cover, a high-pressure exhaust port is provided on the outer wall of the rear cover, and a fourth sealing ring is provided on the outer wall of one side of the rear cover.

[0015] As a further technical solution of the present invention, a motor rotor is fixedly connected to the main shaft, a motor stator is sleeved on the motor rotor, and the motor stator is fixedly connected to the inner wall of the cylinder body, an oil suction channel is opened in the main shaft, and the oil suction channel is conductively connected to the liquid containing cavity.

[0016] As a further technical solution of the present invention, one end of the cylinder body is fixedly connected to a front cover, a first bolt is sleeved on the outer wall of the front cover, and the other end of the first bolt is threadedly connected to the cylinder body, and a first sealing ring is provided on one side outer wall of the front cover.

[0017] As a further technical solution of the present invention, a support frame is arranged on an inner wall of one side of the front cover, a first bearing is arranged on the support frame, and the main shaft is sleeved in the first bearing.

[0018] As a further technical solution of the present invention, a low-pressure air intake port and a supporting foot are provided on an outer wall of one side of the cylinder body, a second bearing is fixedly connected to the inner wall of the cylinder body, and the main shaft is sleeved on the second bearing.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention solves the problem of refrigerant liquefaction at low temperature by arranging a liquid containing cavity inside the compressor to contain the separated liquid refrigerant and lubricating oil, and by rotating and stirring the motor rotor to form oil mist that enters the compressor. At the same time, when the compressor stops or defrosts, the liquid refrigerant first enters the liquid containing cavity and is partially gasified or atomized, which reduces the possibility of the liquid refrigerant directly entering the suction cavity for compression, thereby improving the anti-liquid impact capability of the compressor. By opening a hole on the moving disk, when the suction ends and compression begins, part of the gas in the cavity enters the main drive bearing cavity through the hole, which The bearings are forced to be lubricated so that they are always in the flowing refrigerant, improving the lubrication conditions and ensuring the normal operation of the compressor. Special sealing rings are designed, which are composed of PTFE, PI, MoS2 and carbon fiber filling. They have a low friction coefficient and good supporting force, allowing the compressor to operate for a long time with little oil, and provide sufficient supporting force and a low friction coefficient during high-pressure ratio compression, further improving the lubrication effect and operating stability. At the same time, an annular gas passage is formed between the main shaft and the shell, which not only ensures sufficient gas flow damping, but also forms pressure, providing sufficient lubricating oil for the moving parts in the cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view cutaway structural schematic diagram of the present invention;

[0021] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of the A area in the middle;

[0022] Figure 3 It is a side view cutaway structural schematic diagram of the present invention;

[0023] Figure 4 It is a three-dimensional structural schematic diagram of the moving disk assembly of the present invention;

[0024] Figure 5 It is a three-dimensional structural schematic diagram of the moving disk assembly of the present invention from another viewing angle;

[0025] Figure 6 It is a front view cross-sectional structural schematic diagram of the moving disc assembly of the present invention;

[0026] Figure 7 It is a schematic diagram of the side cutaway structure of the moving disc assembly of the present invention.

[0027] In the figure: 101, front cover; 102, first bearing; 103, support frame; 104, first sealing ring; 105, first bolt; 201, motor stator; 202, main shaft; 203, motor rotor; 204, oil suction channel; 301, cylinder body; 302, second bearing; 303, liquid chamber; 304, overflow channel; 305, first channel; 306, low-pressure air intake port; 307, support foot; 4, moving disk assembly; 401, third bearing; 402, moving scroll disk; 403, second sealing ring; 404, eccentric block; 405, first cavity; 406, second channel; 407, third channel; 408, second cavity; 409, first chassis; 5, static disk assembly; 501, static vortex disk; 502, check valve; 503, third sealing ring; 504, pressure relief valve; 505, air outlet; 506, second chassis; 601, rear cover; 602, buffer cavity; 603, high-pressure exhaust port; 604, second bolt; 605, fourth sealing ring. DETAILED DESCRIPTION

[0028] 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.

[0029] Please refer to the attached Figure 1 -Attached Figure 7, an embodiment of the present invention: an electric scroll compressor for freezing and refrigeration, comprising a cylinder body 301, a main shaft 202 is arranged in the cylinder body 301, one end of the main shaft 202 is fixedly connected to an eccentric block 404, a moving plate assembly 4 is arranged on one side of the main shaft 202, the moving plate assembly 4 comprises a first chassis 409, and the first chassis 409 is arranged in the cylinder body 301, the main shaft 202 is fixedly connected to the first chassis 409, a second cavity 408 is opened on the outer wall of one side of the first chassis 409, a third bearing 401 is fixedly connected in the second cavity 408, and the main shaft 202 is sleeved in the third bearing 401, a movable scroll 402 is fixedly connected to the outer wall of the other side of the first chassis 409, the first chassis 409 A second channel 406 is provided at a position of the outer wall on one side corresponding to the movable scroll plate 402, a third channel 407 is provided on the inner wall of the second cavity 408, and the third channel 407 is conductively connected to the second channel 406, and a second sealing ring 403 is fixedly connected to the outer wall on one side of the first chassis 409; a liquid containing cavity 303 is provided in the cylinder body 301, a first channel 305 is provided on the inner wall of the liquid containing cavity 303, an overflow channel 304 is provided at the gap between the main shaft 202 and the cylinder body 301 in the liquid containing cavity 303, when the gas pressure is greater than the suction port pressure, it overflows from the overflow channel 304, the overflow channel 304 is an annular gap formed by the cylinder body 301 and the main shaft 202, and its single-side gap is between 0.03 and 0.08, that is, the gas pressure is greater than the suction port pressure. It ensures sufficient gas flow damping to form pressure and provides sufficient lubricating oil for the moving parts in the first cavity 405; a first cavity 405 is provided at the gap between the first chassis 409 and the cylinder body 301, and the first cavity 405 is connected to the overflow channel 304, and the first cavity 405 is used to receive and accommodate the gas ejected from the third channel 407; a static disk assembly 5 is provided on one side of the moving disk assembly 4, and the static disk assembly 5 includes a second chassis 506, and the second chassis 506 is fixedly connected to the inner wall of the cylinder body 301, and a static scroll 501 is fixedly connected to one side of the outer wall of the second chassis 506, and the moving scroll 402 is provided on the static scroll 501, and a third sealing ring 503 is provided on one side of the outer wall of the static scroll 501, The third sealing ring 503 is used for sealing; an air outlet 505 is provided on the outer wall of one side of the second chassis 506, and a check valve 502 is fixedly connected to the air outlet 505; a pressure relief valve 504 is fixedly connected to the outer wall of one side of the second chassis 506; a rear cover 601 is provided on one side of the moving plate assembly 4; a second bolt 604 is sleeved on the outer wall of the rear cover 601, and the other end of the second bolt 604 is threadedly connected to the cylinder body 301; the pressure relief valve 504 is used to discharge the gas in the buffer chamber 602 downward into the cylinder body 301 when the exhaust temperature exceeds the design limit value; the rapid increase of temperature is detected by the temperature sensor on the motor winding, and the power supply is cut off to protect the compressor; the second bolt 604 is used to fix the rear cover 601;A buffer chamber 602 is provided in the rear cover 601, a high-pressure exhaust port 603 is provided on the outer wall of the rear cover 601, and a fourth sealing ring 605 is provided on the outer wall of one side of the rear cover 601. The buffer chamber 602 is used to buffer the pulse gas discharged from the air outlet 505 and discharge it through the high-pressure exhaust port 603 with a stable flow rate; a motor rotor 203 is fixedly connected to the main shaft 202, a motor stator 201 is sleeved on the motor rotor 203, and the motor stator 201 is fixedly connected to the inner wall of the cylinder body 301, an oil suction channel 204 is provided in the main shaft 202, and the oil suction channel 204 is connected to the liquid chamber 303, the motor rotor 203 and the motor stator 201 are used to drive the main shaft 202 to rotate, and the oil suction channel 204 is used to suck in lubricating oil through centrifugal force when the main shaft 202 rotates, and spray it out through the small holes provided on the main shaft 202 to lubricate the surfaces of components at various positions; One end of the cylinder 301 is fixedly connected with the front cover 101, and the first bolt 105 is sleeved on the outer wall of the front cover 101, and the other end of the first bolt 105 is threadedly connected to the cylinder 301. A first sealing ring 104 is arranged on the outer wall of one side of the front cover 101, and the first bolt 105 is used to fix the front cover 101, and the first sealing ring 104 is used for sealing; a support frame 103 is arranged on the inner wall of one side of the front cover 101, and a first bearing 102 is arranged on the support frame 103, and the main shaft 202 is sleeved in the first bearing 102, and the first bearing 102 is used to stabilize the main shaft 202; a low-pressure air intake port 306 and a supporting foot 307 are arranged on the outer wall of one side of the cylinder 301, and a second bearing 302 is fixedly connected to the inner wall of the cylinder 301, and the main shaft 202 is sleeved on the second bearing 302, and the supporting foot 307 is used to support and place the cylinder 301, and the second bearing 302 is used to stabilize the main shaft 202. ;

[0030] Working principle: When the present invention is used, the first bearing 102 on the support frame 103 on the front cover 101, the second bearing 302 in the cylinder body 301, and the two ends of the connecting assembly of the main shaft 202 and the motor rotor 203 are assembled on the bearings to form the driving end of the scroll compressor. When the current passes through the coil on the motor stator 201, a rotating magnetic field is generated, which interacts with the magnetic field of the motor rotor 203 to generate an electromagnetic force to drive the main shaft 202 to rotate. An eccentric connecting shaft is provided at one end of the main shaft 202, and the rotation balance is maintained by the eccentric block 404 on the main shaft 202. One end of the main shaft 202 is sleeved in the third bearing 401 and is connected to the moving plate group through the eccentric connecting shaft. Component 4, the main shaft 202 drives the movable disk assembly 4 to perform orbital and translational motion, wherein the movable scroll 402 on the first chassis 409 is meshed with the fixed scroll 501 on the second chassis 506 of the static disk assembly 5, and the low-pressure coolant gas is sucked in by the low-pressure air intake port 306 on the cylinder body 301 and enters the crescent-shaped working volume formed between the movable scroll 402 and the fixed scroll 501. As the movable scroll 402 rotates, these crescent-shaped working volumes gradually shrink, thereby compressing the sucked gas. During the compression process, the fixed scroll 501 remains fixed, while the movable scroll 402 moves in a clockwise circular motion at a certain angle. This continuous change causes the gas to be gradually compressed into high-pressure Gas, when the gas is compressed to a sufficient pressure, is discharged through the outlet hole 505 on the second chassis 506, and is prevented from backflowing by the check valve 502. The gas is discharged from the outlet hole 505 in a pulsed form, and is discharged from the high-pressure exhaust port 603 at a constant flow rate after being buffered by the buffer chamber 602, completing the vortex compression process, wherein the cylinder body 301 is divided into two chambers, which are connected through the first channel 305. The distance between the first channel 305 and the lowest point of the chamber is between 0.5R and 0.8R. The chamber is used to accommodate the liquid refrigerant separated after the gas-liquid separation of the refrigerant sucked in by the low-pressure suction port 306. The motor rotor 203 stirs the liquid refrigerant and The lubricating oil, after forming oil mist, enters the compressor through the first channel 305. A special liquid chamber 303 is constructed at the bottom of the cavity, and its volume is 100-500ml. When the compressor stops or defrosts, the liquid refrigerant entering the compressor first enters the liquid chamber 303, reducing the possibility of the liquid refrigerant directly entering the suction chamber for compression, and improving the compressor's ability to resist liquid impact. The second sealing ring 403 is a circular structure, and its composition is PTFE 50%-70%, PI 30%-40%, MoS 25%-10%, carbon fiber filling, and the sintering temperature is 280-320℃. It is bonded to the first chassis 409 and is 0.015-0.030mm above the plane of the first chassis 409.025cm, through this design, the compressor can still run for a long time with less oil, provide sufficient support force and low friction coefficient when compressing at high pressure ratio, when the suction ends and compression begins, part of the gas in the cavity enters from the second channel 406 and is discharged from the third channel 407, and the third bearing 401 in the second cavity 408 is forced to be lubricated, so that the third bearing 401 is always in the flowing refrigerant, the lubrication condition is improved, and the service life of the third bearing 401 is increased by 20% to 40%, the second sealing ring 403, the cylinder 301 and the first chassis 409 cooperate to form the first cavity 405, the first cavity 405 receives and accommodates the gas ejected from the third channel 407, and the eccentric block 404 rotates and stirs to form splash lubrication, when the gas pressure is greater than the suction port pressure, it overflows from the overflow channel 304, the overflow channel 304 is an annular gap formed by the cylinder 301 and the main shaft 202, and its single The side clearance is between 0.03 and 0.08, which ensures sufficient gas flow damping to form pressure and provides sufficient lubricating oil for the moving parts in the first cavity 405; the first sealing ring 104, the third sealing ring 503 and the fourth sealing ring 605 are used for sealing between the parts, the first bolt 105 and the second bolt 604 are used to install and fix the front cover 101 and the rear cover 601 respectively, the oil suction channel 204 is used to suck the lubricating oil by centrifugal force when the main shaft 202 rotates, and spray it through the small holes opened on the main shaft 202 to lubricate the surface of the parts at various positions, the support foot 307 is used to support the cylinder 301, and the pressure relief valve 504 is used to discharge the gas in the buffer cavity 602 downward into the cylinder 301 when the exhaust temperature exceeds the design limit value, and the rapid temperature rise is detected by the temperature sensor on the motor winding, and the power supply is cut off to protect the compressor. .

[0031] 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 electric scroll compressor for refrigeration and freezing, comprising a cylinder body (301), characterized in that: A main shaft (202) is arranged in the cylinder body (301), one end of the main shaft (202) is fixedly connected to an eccentric block (404), one side of the main shaft (202) is arranged with a movable plate assembly (4), the movable plate assembly (4) comprises a first chassis (409), and the first chassis (409) is arranged in the cylinder body (301), the main shaft (202) is fixedly connected to the first chassis (409), a second cavity (408) is opened on the outer wall of one side of the first chassis (409), and a third bearing (404) is fixedly connected in the second cavity (408). 1), and the main shaft (202) is sleeved in the third bearing (401), a movable scroll (402) is fixedly connected to the outer wall of the other side of the first chassis (409), a second channel (406) is opened at a position of the outer wall of one side of the first chassis (409) corresponding to the movable scroll (402), a third channel (407) is opened on the inner wall of the second cavity (408), and the third channel (407) is conductively connected to the second channel (406), and a second sealing ring (403) is fixedly connected to the outer wall of one side of the first chassis (409).

2. The electric scroll compressor for refrigeration and freezing according to claim 1, characterized in that: A liquid containing cavity (303) is provided in the cylinder body (301), a first channel (305) is provided on the inner wall of the liquid containing cavity (303), and an overflow channel (304) is provided at the gap between the main shaft (202) and the cylinder body (301) in the liquid containing cavity (303).

3. The electric scroll compressor for refrigeration and freezing according to claim 1, characterized in that: A first cavity (405) is provided in the gap between the first bottom plate (409) and the cylinder body (301), and the first cavity (405) is in communication with the overflow channel (304).

4. The electric scroll compressor for refrigeration and freezing according to claim 1, characterized in that: A static disk assembly (5) is arranged on one side of the movable disk assembly (4), and the static disk assembly (5) includes a second chassis (506), and the second chassis (506) is fixedly connected to the inner wall of the cylinder body (301), a static scroll (501) is fixedly connected to the outer wall of one side of the second chassis (506), and the movable scroll (402) is arranged on the static scroll (501), and a third sealing ring (503) is arranged on the outer wall of one side of the static scroll (501).

5. The electric scroll compressor for refrigeration and freezing according to claim 4, characterized in that: An air outlet (505) is provided on an outer wall of one side of the second chassis (506), a check valve (502) is fixedly connected to the air outlet (505), a pressure relief valve (504) is fixedly connected to an outer wall of one side of the second chassis (506), a rear cover (601) is provided on one side of the movable plate assembly (4), a second bolt (604) is sleeved on the outer wall of the rear cover (601), and the other end of the second bolt (604) is threadedly connected to the cylinder body (301).

6. The electric scroll compressor for refrigeration and freezing according to claim 5, characterized in that: A buffer chamber (602) is provided in the rear cover (601), a high-pressure exhaust port (603) is provided on the outer wall of the rear cover (601), and a fourth sealing ring (605) is provided on one side outer wall of the rear cover (601).

7. The electric scroll compressor for refrigeration and freezing according to claim 1, characterized in that: The main shaft (202) is fixedly connected to a motor rotor (203), the motor rotor (203) is sleeved with a motor stator (201), and the motor stator (201) is fixedly connected to the inner wall of the cylinder body (301). An oil suction channel (204) is provided in the main shaft (202), and the oil suction channel (204) is conductively connected to the liquid containing cavity (303).

8. The electric scroll compressor for refrigeration and freezing according to claim 1, characterized in that: One end of the cylinder body (301) is fixedly connected to a front cover (101), a first bolt (105) is sleeved on the outer wall of the front cover (101), and the other end of the first bolt (105) is threadedly connected to the cylinder body (301), and a first sealing ring (104) is provided on one side outer wall of the front cover (101).

9. The electric scroll compressor for refrigeration and freezing according to claim 8, characterized in that: A support frame (103) is arranged on an inner wall of one side of the front cover (101), a first bearing (102) is arranged on the support frame (103), and the main shaft (202) is sleeved in the first bearing (102).

10. The electric scroll compressor for refrigeration and freezing according to claim 1, characterized in that: A low-pressure air intake port (306) and a support foot (307) are provided on one side outer wall of the cylinder body (301), a second bearing (302) is fixedly connected to the inner wall of the cylinder body (301), and the main shaft (202) is sleeved on the second bearing (302).

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