阅读说明：本技术 一种电动汽车空调用卧式双缸增焓旋转压缩机及工作方法 (Horizontal double-cylinder enthalpy-increasing rotary compressor for electric automobile air conditioner and working method ) 是由 吴建华 杜文清 李澳特 于 2019-10-21 设计创作，主要内容包括：一种电动汽车空调用卧式双缸增焓旋转压缩机及工作方法,该压缩机泵体采用并联双缸结构,两个气缸的相对气缸高度比大,均采用双排气结构,在减少气缸直径的同时满足气阀布置及可靠性需求；主轴承侧气缸采用非圆形设计作为支撑件,与壳体中段内部的环形端面进行密封和固定,并将压缩机壳体内部分割为低压腔及高压腔,电机处于低压腔,油池处于高压腔；泵体副轴承径向伸出部分和中间隔板开有供油孔,副轴承及曲轴偏心部位设有螺旋油槽,利用吸排气压差将润滑油从油池供入副轴承卸荷油槽和中间隔板内腔,再通过螺旋油槽将润滑油供给至主轴承；本发明可降低增焓旋转压缩机的径向尺寸满足车载需求,同时有利于降低压缩机封油量,维持油面平稳,克服现有卧式旋转压缩机的供油问题。(A horizontal double-cylinder enthalpy-increasing rotary compressor for an electric automobile air conditioner and a working method are disclosed, wherein a pump body of the compressor adopts a parallel double-cylinder structure, the height ratio of relative cylinders of two cylinders is large, and double exhaust structures are adopted, so that the diameter of the cylinders is reduced, and meanwhile, the requirements on air valve arrangement and reliability are met; the main bearing side cylinder adopts a non-circular design as a support piece, is sealed and fixed with an annular end face in the middle section of the shell, divides the interior of the shell of the compressor into a low-pressure cavity and a high-pressure cavity, the motor is positioned in the low-pressure cavity, and the oil pool is positioned in the high-pressure cavity; the radial extension part of the auxiliary bearing of the pump body and the middle spacing plate are provided with oil supply holes, the auxiliary bearing and the eccentric part of the crankshaft are provided with spiral oil grooves, lubricating oil is supplied from an oil pool to an unloading oil groove of the auxiliary bearing and the inner cavity of the middle spacing plate by utilizing suction and exhaust pressure difference, and then the lubricating oil is supplied to the main bearing through the spiral oil grooves; the invention can reduce the radial size of the enthalpy-increasing rotary compressor to meet the vehicle-mounted requirement, is beneficial to reducing the oil sealing amount of the compressor, maintains the oil level to be stable, and overcomes the oil supply problem of the existing horizontal rotary compressor.)

1. A horizontal double-cylinder enthalpy-increasing rotary compressor for an electric automobile air conditioner comprises a shell (1), a compressor controller (2) arranged on the outer side of the end face of the shell (1), a motor and a pump body arranged in the shell (1); the method is characterized in that: a low-pressure air suction pipe (3), a medium-pressure air suction pipe (18) and a high-pressure exhaust cyclone separator (4) are arranged on the shell (1); the motor is composed of a stator (5) and a rotor (6) arranged at the inner side of the stator (5) in a clearance mode; the pump body comprises a crankshaft (7), a main bearing (8), a main bearing side silencer (9), a main bearing side cylinder (10), a middle cover plate (11), a middle partition plate (12), an auxiliary bearing side cylinder (13), an auxiliary bearing (14), an auxiliary bearing side silencer (15), a main bearing side rolling piston (16), an auxiliary bearing side rolling piston (17), a middle exhaust cavity (19), a low pressure cavity (20) and a high pressure cavity (21); the crankshaft (7) is positioned in the center of a pump body and extends into a rotor (6) along the horizontal direction, a main bearing side rolling piston (16) is sleeved on a main bearing side eccentric part (71) of the crankshaft (7), a secondary bearing side rolling piston (17) is sleeved on a secondary bearing side eccentric part (72) of the crankshaft (7), the main bearing side eccentric part (71) of the crankshaft (7) is positioned in a main bearing side cylinder (10), the secondary bearing side eccentric part (72) of the crankshaft (7) is positioned in a secondary bearing side cylinder (13), the main bearing side cylinder (10) is positioned at the side close to a motor, two end faces of the main bearing side cylinder (10) are respectively matched and sealed with a main bearing (8) and a middle cover plate (11), a main bearing side silencer (9) is arranged on the main bearing (8), two end faces of the secondary bearing side cylinder (13) are respectively matched and sealed with a middle clapboard (12) and a secondary bearing (14), a secondary bearing side muffler (15) is arranged on the secondary bearing (14), and a middle partition plate (12) and a middle cover plate (11) are matched and sealed to form a middle exhaust cavity (19); the end face of the main bearing side cylinder (10) connected with the main bearing (8) is matched with an annular end face (101) in the shell (1), meanwhile, the shell (1) and the wall face of the main bearing side cylinder (10) are in interference fit, so that the interior of the compressor shell is divided into two chambers, namely a low-pressure chamber (20) and a high-pressure chamber (21), wherein the low-pressure chamber (20) is formed by enclosing the shell (1) and the main bearing side cylinder (10) in the shell, the main bearing (8) and a main bearing side silencer (9), a stator (5) and a rotor (6), the high-pressure chamber (21) is formed by enclosing the shell (1) and the main bearing side cylinder (10) in the shell, an intermediate cover plate (11), an intermediate partition plate (12), an auxiliary bearing side cylinder (13), an auxiliary bearing (14) and an auxiliary bearing side silencer (15), and sealing rings are additionally arranged on the outer wall faces of the annular end face (101) and the, the oil pool (22) is arranged at the bottom of the high-pressure cavity (21).

2. The horizontal double-cylinder enthalpy-increasing rotary compressor for the electric automobile air conditioner as claimed in claim 1, characterized in that: the main bearing side air cylinder (10) is of a non-circular structure, and the wall surface of the main bearing side air cylinder is provided with a main bearing side air cylinder sliding vane sliding chute (100) and a main bearing side air cylinder air suction structure (101), wherein the main bearing side air cylinder air suction structure (101) consists of a main bearing side air cylinder axial through hole (1011), a plurality of main bearing side air cylinder radial air suction holes (1010) which are connected with the main bearing side air cylinder axial through hole (1011) and the inner wall surface of the main bearing side air cylinder (10); the height ratio of the main bearing side cylinder (10) to the cylinder, namely the ratio of the height to the diameter of the working volume of the cylinder, is 0.5-1.2, a double-exhaust structure is adopted to meet the requirements of air valve arrangement and reliability, and exhaust can be simultaneously performed on a cavity of the main bearing side silencer (9) and the middle exhaust cavity (19); a main bearing side cylinder high-pressure exhaust through hole (102) is axially formed in the wall surface of the main bearing side cylinder (10) and used for communicating a chamber of a main bearing side silencer (9) and a chamber of a secondary bearing side silencer (15); meanwhile, the main bearing side cylinder (10) is used as a positioning and supporting structure of the pump body, and the bottom of the main bearing side cylinder is designed to be a plane, so that the main bearing side cylinder is convenient to mount and fix.

3. The horizontal double-cylinder enthalpy-increasing rotary compressor for the electric automobile air conditioner as claimed in claim 1, characterized in that: the wall surface of the auxiliary bearing side cylinder (13) is processed with an auxiliary bearing side cylinder sliding vane sliding chute (130) and an auxiliary bearing side cylinder air suction structure (131), wherein the auxiliary bearing side cylinder air suction structure (131) consists of an auxiliary bearing side cylinder axial through hole (1310), and a plurality of auxiliary bearing side cylinder radial air suction holes (1311) which are connected with the auxiliary bearing side cylinder axial through hole (1310) and the inner wall surface of the auxiliary bearing side cylinder (13); the height ratio of the auxiliary bearing side cylinder (13) to the cylinder, namely the ratio of the height to the diameter of the working volume of the cylinder, is 0.5-1.2, a double-exhaust structure is adopted to meet the requirements of air valve arrangement and reliability, and exhaust can be simultaneously performed on a cavity of the auxiliary bearing side silencer (15) and the middle exhaust cavity (19); the wall surface of the auxiliary bearing side cylinder (13) is axially provided with an auxiliary bearing side cylinder high-pressure exhaust through hole (132) for communicating a cavity of the main bearing side silencer (9) and a cavity of the auxiliary bearing side silencer (15).

4. The horizontal double-cylinder enthalpy-increasing rotary compressor for the electric automobile air conditioner as claimed in claim 1, characterized in that: a main bearing exhaust hole (81), a main bearing high-pressure exhaust through hole (82) for communicating a cavity of the main bearing side muffler (9) with a cavity of the auxiliary bearing side muffler (15), and an annular plane (83) matched with the main bearing side muffler (9) are processed on the main bearing (8); the matching part of the main bearing (8) and the main bearing side cylinder (10) is of a non-circular structure, and the main bearing radial protruding part (84) is used for covering a sliding vane sliding groove (100) in the main bearing side cylinder (10) to prevent lubricating oil and refrigerant from leaking to the low-pressure cavity (20) in a serial mode.

5. The horizontal double-cylinder enthalpy-increasing rotary compressor for the electric automobile air conditioner as claimed in claim 1, characterized in that: the matching part of the auxiliary bearing (14) and the auxiliary bearing side cylinder (13) is of a non-circular structure, an auxiliary bearing exhaust hole (141) is formed in the matching surface, and an auxiliary bearing high-pressure exhaust through hole (142) for communicating a cavity of the main bearing side muffler (9) with a cavity of the auxiliary bearing side muffler (15) is formed in the axial direction; a radial protruding part (143) of the auxiliary bearing (14) is immersed in the oil pool (22), an upper auxiliary bearing radial oil hole (144) communicated with an unloading oil groove (145) in the auxiliary bearing (14) is formed in the radial protruding part (143) of the auxiliary bearing (14), and an auxiliary bearing spiral oil groove (146) is formed in the inner surface of the auxiliary bearing (14).

6. The horizontal double-cylinder enthalpy-increasing rotary compressor for the electric automobile air conditioner as claimed in claim 1, characterized in that: a middle partition plate exhaust hole (121), a middle partition plate high-pressure exhaust through hole (122) for communicating a cavity of the main bearing side muffler (9) with a cavity of the auxiliary bearing side muffler (15), a middle partition plate low-pressure suction through hole (123) for communicating a low-pressure cavity (20) with the auxiliary bearing side cylinder (13), and a middle partition plate positioning hole (126) assembled with the auxiliary bearing side cylinder (13) are machined in the axial direction of the middle partition plate (12); a middle clapboard air supply jack (124) is processed in the radial direction of the middle clapboard (12), a middle clapboard radial oil hole (127) is processed in the radial direction of the middle clapboard, and a middle clapboard air supply through hole (125) is processed in the axial direction of the middle clapboard (12) and penetrates through the air pipe jack (124).

7. The horizontal double-cylinder enthalpy-increasing rotary compressor for the electric automobile air conditioner as claimed in claim 1, characterized in that: the middle cover plate is characterized in that a middle cover plate exhaust hole (111) is processed in the axial direction of the middle cover plate (11), a middle cover plate high-pressure exhaust through hole (112) used for communicating a cavity of a main bearing side silencer (9) and a cavity of an auxiliary bearing side silencer (15), a middle cover plate low-pressure air suction through hole (113) used for communicating a low-pressure cavity (20) and an auxiliary bearing side air cylinder (13), a middle cover plate positioning hole (114) assembled with the main bearing side air cylinder (10), and a middle cover plate air supplement through hole (115).

8. The horizontal double-cylinder enthalpy-increasing rotary compressor for the electric automobile air conditioner as claimed in claim 1, characterized in that: the main bearing side silencer (9) is processed with a turned edge (90) which is matched and sealed with an annular plane (83) on the main bearing (8), so that a cavity of the main bearing side silencer (9) is isolated from the low-pressure cavity (20) to form an independent cavity.

9. The horizontal double-cylinder enthalpy-increasing rotary compressor for the electric automobile air conditioner as claimed in claim 1, characterized in that: the crankshaft (7) is of a solid eccentric structure, a main bearing side spiral oil groove (73) is machined in a main bearing side eccentric position (71), and an auxiliary bearing side spiral oil groove (74) is machined in an auxiliary bearing side eccentric position (72).

10. The working method of the horizontal double-cylinder enthalpy-increasing rotary compressor for the air conditioner of the electric automobile according to any one of claims 1 to 9, firstly, a stator (5) of a motor is electrified and started through a compressor controller (2), and a rotor (6) rotates; the rotor (6) drives the crankshaft (7) to rotate, the rotation of the crankshaft (7) drives the main bearing side rolling piston (16) to eccentrically rotate in the main bearing side cylinder (10), and the auxiliary bearing side rolling piston (17) eccentrically rotates in the auxiliary bearing side cylinder (13);

the refrigerant flow in the working process is as follows: a low-pressure refrigerant at the outlet of an evaporator of an air conditioning system of the electric automobile enters a low-pressure cavity (20) from a low-pressure air suction pipe (3) on a shell (1), cools a compressor controller (2) on the outer side of the end face of the shell (1), and cools a motor through a gap between a stator (5) and a rotor (6); after the low-pressure refrigerant enters the axial through hole (1011) of the main bearing side cylinder, a part of the refrigerant enters the main bearing side cylinder (10) from the radial suction hole (1010) of the main bearing side cylinder, and the other part of the refrigerant continues to enter the auxiliary bearing side cylinder (13) through the low-pressure suction through hole (113) of the middle cover plate, the low-pressure suction through hole (123) of the middle partition plate and the suction structure (131) of the auxiliary bearing side cylinder, so that the suction process is realized; after medium-pressure refrigerant at the outlet of an economizer or a flash tank of an air conditioning system of the electric automobile enters a middle clapboard air supply pipe jack (124) through a medium-pressure air suction pipe (18) on a shell (1), the medium-pressure refrigerant respectively enters a secondary bearing side cylinder (13) through a middle clapboard air supply through hole (125), and a middle cover plate air supply through hole (115) enters a main bearing side cylinder (10), so that the air supply process is realized; with the rotation of the crankshaft (7), high-pressure refrigerant in the main bearing side cylinder (10) is discharged into a cavity of a main bearing silencer (9) through a main bearing exhaust hole (81), and is discharged into a middle exhaust cavity (19) through a middle cover plate exhaust hole (111), and high-pressure refrigerant in the auxiliary bearing side cylinder (13) is discharged into a cavity of an auxiliary bearing side silencer (15) through an auxiliary bearing exhaust hole (141), and is discharged into the middle exhaust cavity (19) through a middle clapboard exhaust hole (121); high-pressure refrigerant in the cavity of the main bearing side muffler (9) sequentially passes through the main bearing high-pressure exhaust through hole (82), the main bearing side cylinder high-pressure exhaust through hole (102), the middle cover plate high-pressure exhaust through hole (112) and the middle partition plate high-pressure exhaust through hole (122) to be mixed with refrigerant in the middle exhaust cavity (19), then enters the cavity of the auxiliary bearing side muffler (15) through the auxiliary bearing side cylinder high-pressure exhaust through hole (132) and the auxiliary bearing high-pressure exhaust through hole (142), finally flows into the high-pressure cavity (21) through the refrigerant in the cavity of the auxiliary bearing side muffler (15), and then is subjected to oil-gas separation through the high-pressure exhaust cyclone separator (4) and is discharged;

the oil supply flow during work is as follows: under the action of pressure difference of refrigerant in the main bearing side cylinder (10), the auxiliary bearing side cylinder (13) and the high-pressure cavity (21), one part of lubricating oil in the oil pool (22) enters an unloading oil groove (145) from an auxiliary bearing radial oil hole (144), and the other part of lubricating oil enters an inner cavity of the intermediate partition plate (12) from an intermediate partition plate radial oil hole (127); with the rotation of the crankshaft (7), one part of lubricating oil in the unloading oil groove (145) lubricates the auxiliary bearing (14) through the auxiliary bearing spiral oil groove (146), and the other part of the lubricating oil is transferred to the inner cavity of the intermediate partition plate (12) from the auxiliary bearing side spiral oil groove (74) on the crankshaft (7) and mixed, so that the lubrication between the auxiliary bearing side rolling piston (17) and the auxiliary bearing side eccentric part (72) is realized; lubricating oil in the inner cavity of the middle partition plate (12) is transferred to the side of the main bearing (8) from a main bearing side spiral oil groove (73) on the crankshaft (7), so that lubrication between a main bearing side rolling piston (16) and a main bearing side eccentric part (71) is realized; and finally, under the action of the pressure difference of the refrigerant in the main bearing side air cylinder (10) and the low-pressure cavity (20), lubricating oil migrates to the low-pressure cavity (20) to lubricate the main bearing (8), oil return is realized along with air suction of the lubricating oil entering the low-pressure cavity (20), and a rotary sealing structure is added at the matching section of the main bearing (8) and the crankshaft (7) to reduce the oil output.

Technical Field

The invention relates to a compressor for an electric automobile air conditioner, in particular to a horizontal double-cylinder enthalpy-increasing rotary compressor for the electric automobile air conditioner and a working method.

Background

Although the development of the electric automobile industry is rapid at present, the energy consumption problem of an air conditioning system is not solved effectively all the time. The PTC heating is adopted in winter, the running mileage of the electric automobile is seriously attenuated, and particularly, the thermal load requirements of a cab and a battery are met under the low-temperature working condition, so that the problems are more remarkable.

Along with the application of a frequency conversion technology and an air-supplementing enthalpy-increasing heat pump, the performance and the energy efficiency ratio of the air conditioning system of the electric automobile under severe working conditions are effectively improved. The existing air-conditioning compressor of the electric automobile mainly takes a scroll compressor as a main part, and quasi-secondary compression circulation is realized by arranging an air-supplementing and enthalpy-increasing hole on a fixed scroll. However, the electric scroll compressor has long development period, high production cost, large early investment and higher cost.

In addition to electric scroll compressors, electric rotary compressors are also a viable solution. The rotary compressor has the advantages of simple structure, high efficiency, good reliability and low processing cost, and the application range of the rotary compressor is larger and larger compared with that of a scroll compressor in the markets of air conditioners and heat pumps. These are all due to the advantages of the above-mentioned properties, reliability and cost combination. The rotary compressor can realize quasi-two-stage circulation through piston cutting or a check valve structure. However, the electric automobile has a limit to the installation space of the compressor, the height ratio of the relative cylinder needs to be improved to reduce the radial size of the compressor, and the arrangement requirement of the exhaust valve of the compressor cylinder is difficult to meet by adopting a double-cylinder double-exhaust structure; meanwhile, the problem of oil supply of the horizontal rotary compressor under variable working conditions and different inclination angles still needs to be solved.

Disclosure of Invention

In order to overcome the problems in the prior art, the invention aims to provide a horizontal double-cylinder enthalpy-increasing rotary compressor for an electric automobile air conditioner and a working method thereof, and the invention can further reduce the radial size of the double-cylinder enthalpy-increasing rotary compressor so as to meet the requirement of an electric automobile on the installation space of the compressor; meanwhile, the oil supply problem of the horizontal rotary compressor is solved, the lubricating capability of the horizontal rotary compressor under variable working conditions and variable inclination angles is improved, and the reliability of the vehicle-mounted compressor is guaranteed.

In order to achieve the purpose, the invention adopts the following technical scheme:

a horizontal double-cylinder enthalpy-increasing rotary compressor for an electric automobile air conditioner comprises a shell 1, a compressor controller 2 arranged on the outer side of the end face of the shell 1, and a motor and a pump body arranged in the shell 1;

a low-pressure air suction pipe 3, a medium-pressure air suction pipe 18 and a high-pressure exhaust cyclone separator 4 are arranged on the shell 1;

the motor is composed of a stator 5 and a rotor 6 arranged inside the stator 5 in a clearance mode;

the pump body comprises a crankshaft 7, a main bearing 8, a main bearing side silencer 9, a main bearing side cylinder 10, a middle cover plate 11, a middle partition plate 12, an auxiliary bearing side cylinder 13, an auxiliary bearing 14, an auxiliary bearing side silencer 15, a main bearing side rolling piston 16, an auxiliary bearing side rolling piston 17, a middle exhaust cavity 19, a low pressure cavity 20 and a high pressure cavity 21; the crankshaft 7 is positioned in the center of the pump body and extends into the rotor 6 along the horizontal direction, a main bearing side rolling piston 16 is sleeved on a main bearing side eccentric part 71 of the crankshaft 7, an auxiliary bearing side rolling piston 17 is sleeved on an auxiliary bearing side eccentric part 72 of the crankshaft 7, the main bearing side eccentric part 71 of the crankshaft 7 is positioned in a main bearing side cylinder 10, the auxiliary bearing side eccentric part 72 of the crankshaft 7 is positioned in an auxiliary bearing side cylinder 13, and the main bearing side cylinder 10 is positioned at the side close to the motor; two end faces of the main bearing side cylinder 10 are respectively matched and sealed with a main bearing 8 and a middle cover plate 11, and a main bearing side silencer 9 is arranged on the main bearing 8; two end faces of the auxiliary bearing side cylinder 13 are respectively matched and sealed with the middle partition plate 12 and the auxiliary bearing 14, an auxiliary bearing side silencer 15 is installed on the auxiliary bearing 14, and the middle partition plate 12 and the middle cover plate 11 are matched and sealed to form a middle exhaust cavity 19; the end face of the main bearing side cylinder 10 connected with the main bearing 8 is matched with an annular end face 101 in the shell 1, meanwhile, the shell 1 and the wall face of the main bearing side cylinder 10 are in interference fit, so that the interior of the compressor shell is divided into two chambers, namely a low-pressure chamber 20 and a high-pressure chamber 21, the low-pressure chamber 20 is formed by enclosing the shell 1 and the main bearing side cylinder 10 in the shell, the main bearing 8 and a main bearing side silencer 9, a stator 5 and a rotor 6, the high-pressure chamber 21 is formed by enclosing the shell 1 and the main bearing side cylinder 10 in the shell, an intermediate cover plate 11, an intermediate partition plate 12, an auxiliary bearing side cylinder 13, an auxiliary bearing 14 and an auxiliary bearing side silencer 15, sealing rings are additionally arranged on the outer wall faces of the annular end face 101 and the main bearing side cylinder 10 to improve air tightness.

The main bearing side cylinder 10 is of a non-circular structure, and the wall surface of the main bearing side cylinder is provided with a main bearing side cylinder sliding vane sliding chute 100 and a main bearing side cylinder air suction structure 101, wherein the main bearing side cylinder air suction structure 101 consists of a main bearing side cylinder axial through hole 1011, a plurality of main bearing side cylinder radial air suction holes 1010 which are connected with the main bearing side cylinder axial through hole 1011 and the inner wall surface of the main bearing side cylinder 10; the height ratio of the main bearing side cylinder 10 relative to the cylinder, namely the ratio of the height to the diameter of the working volume of the cylinder, is 0.5-1.2, a double-exhaust structure is adopted to meet the requirements of air valve arrangement and reliability, and exhaust can be simultaneously performed on a cavity of the main bearing side silencer 9 and the middle exhaust cavity 19; the main bearing side cylinder 10 is provided with a main bearing side cylinder high-pressure exhaust through hole 102 in the axial direction of the wall surface for communicating the chamber of the main bearing side muffler 9 with the chamber of the auxiliary bearing side muffler 15. Meanwhile, the main bearing side cylinder 10 is used as a positioning and supporting structure of the pump body, and the bottom of the main bearing side cylinder is designed to be a plane, so that the main bearing side cylinder is convenient to mount and fix.

The wall surface of the auxiliary bearing side cylinder 13 is processed with an auxiliary bearing side cylinder sliding vane sliding chute 130 and an auxiliary bearing side cylinder air suction structure 131, wherein the auxiliary bearing side cylinder air suction structure 131 consists of an auxiliary bearing side cylinder axial through hole 1310, a plurality of auxiliary bearing side cylinder radial air suction holes 1311 which are connected with the auxiliary bearing side cylinder axial through hole 1310 and the inner wall surface of the auxiliary bearing side cylinder 13; the height ratio of the auxiliary bearing side cylinder 13 relative to the cylinder, namely the ratio of the height to the diameter of the working volume of the cylinder, is 0.5-1.2, a double-exhaust structure is adopted to meet the requirements of air valve arrangement and reliability, and exhaust can be simultaneously performed on a cavity of an auxiliary bearing side muffler 15 and a middle exhaust cavity 19; the auxiliary bearing side cylinder 13 has an auxiliary bearing side cylinder high pressure exhaust through hole 132 formed in the wall surface thereof in the axial direction for communicating the chamber of the main bearing side muffler 9 with the chamber of the auxiliary bearing side muffler 15.

A main bearing exhaust hole 81, a main bearing high-pressure exhaust through hole 82 for communicating a cavity of the main bearing side muffler 9 with a cavity of the auxiliary bearing side muffler 15 and an annular plane 83 matched with the main bearing side muffler 9 are processed on the main bearing 8; the main bearing 8 and the main bearing side cylinder 10 are non-circular in shape, and the main bearing radial protrusion 84 covers the sliding vane slot 100 in the main bearing side cylinder 10 to prevent the lubricant and the refrigerant from leaking to the low pressure chamber 20.

The matching part of the auxiliary bearing 14 and the auxiliary bearing side cylinder 13 is of a non-circular structure, an auxiliary bearing exhaust hole 141 is processed on the matching surface, and an auxiliary bearing high-pressure exhaust through hole 142 for communicating a cavity of the main bearing side muffler 9 and a cavity of the auxiliary bearing side muffler 15 is processed in the axial direction; the radially protruding portion 143 of the sub-bearing 14 is immersed in the oil sump 22, an upper sub-bearing radial oil hole 144 communicating with an unloading oil groove 145 inside the sub-bearing 14 is formed in the radially protruding portion 143 of the sub-bearing 14, and a sub-bearing screw oil groove 146 is formed in the inner surface of the sub-bearing 14.

A middle partition exhaust hole 121, a middle partition high-pressure exhaust through hole 122 for communicating the chamber of the main bearing side muffler 9 with the chamber of the auxiliary bearing side muffler 15, a middle partition low-pressure suction through hole 123 for communicating the low-pressure chamber 20 with the auxiliary bearing side cylinder 13, and a middle partition positioning hole 126 assembled with the auxiliary bearing side cylinder 13 are formed in the middle partition 12 in the axial direction; the middle clapboard 12 is provided with a middle clapboard air-supplementing pipe jack 124 and a middle clapboard radial oil hole 127 in the radial direction, and the middle clapboard 12 is provided with a middle clapboard air-supplementing through hole 125 which penetrates through the air pipe jack 124 in the axial direction.

The middle cover plate 11 is provided with a middle cover plate exhaust hole 111 in the axial direction, a middle cover plate high-pressure exhaust through hole 112 for communicating the cavity of the main bearing side muffler 9 with the cavity of the auxiliary bearing side muffler 15, a middle cover plate low-pressure suction through hole 113 for communicating the low-pressure cavity 20 with the auxiliary bearing side cylinder 13, a middle cover plate positioning hole 114 assembled with the main bearing side cylinder 10, and a middle cover plate air supplement through hole 115.

The main bearing side muffler 9 is provided with a turned edge 90 which is matched and sealed with the annular plane 83 on the main bearing 8, so that the cavity of the main bearing side muffler 9 is isolated from the low-pressure cavity 20 to form an independent cavity.

The crankshaft 7 is of a solid eccentric structure, and a main bearing side helical oil groove 73 is formed in a main bearing side eccentric portion 71 of the crankshaft, and an auxiliary bearing side helical oil groove 74 is formed in an auxiliary bearing side eccentric portion 72 of the crankshaft.

Firstly, a stator 5 of a motor is electrified and started through a compressor controller 2, and a rotor 6 rotates; the rotor 6 rotates the crankshaft 7, the rotation of the crankshaft 7 rotates the main bearing side rolling piston 16 eccentrically in the main bearing side cylinder 10, and the sub bearing side rolling piston 17 eccentrically rotates in the sub bearing side cylinder 13.

When the horizontal double-cylinder enthalpy-increasing rotary compressor for the electric automobile air conditioner works, a low-pressure refrigerant at the outlet of an evaporator of the electric automobile air conditioner enters a low-pressure cavity 20 from a low-pressure air suction pipe 3 on a shell 1, cools a compressor controller 2 on the outer side of the end face of the shell 1, and cools a motor through a gap between a stator 5 and a rotor 6; after the low-pressure refrigerant enters the axial through hole 1011 of the main bearing side cylinder, a part of the refrigerant enters the main bearing side cylinder 10 from the radial suction hole 1010 of the main bearing side cylinder, and the other part of the refrigerant continues to enter the auxiliary bearing side cylinder 13 through the low-pressure suction through hole 113 of the middle cover plate, the low-pressure suction through hole 123 of the middle clapboard and the suction structure 131 of the auxiliary bearing side cylinder, so that the suction process is realized; after a medium-pressure refrigerant at the outlet of an economizer or a flash tank of an air conditioning system of the electric automobile enters a middle partition plate air supplementing pipe jack 124 through a medium-pressure air suction pipe 18 on the shell 1, the medium-pressure refrigerant respectively enters an auxiliary bearing side cylinder 13 through a middle partition plate air supplementing through hole 125, and an intermediate cover plate air supplementing through hole 115 enters a main bearing side cylinder 10, so that an air supplementing process is realized; with the rotation of the crankshaft 7, the high-pressure refrigerant in the main bearing side cylinder 10 is discharged into the cavity of the main bearing muffler 9 through the main bearing exhaust hole 81, and is simultaneously discharged into the middle exhaust cavity 19 through the middle cover plate exhaust hole 111, and the high-pressure refrigerant in the auxiliary bearing side cylinder 13 is discharged into the cavity of the auxiliary bearing side muffler 15 through the auxiliary bearing exhaust hole 141, and is simultaneously discharged into the middle exhaust cavity 19 through the middle partition plate exhaust hole 121; the high-pressure refrigerant in the cavity of the main bearing side muffler 9 sequentially passes through the main bearing high-pressure exhaust through hole 82, the main bearing side cylinder high-pressure exhaust through hole 102, the middle cover plate high-pressure exhaust through hole 112 and the middle partition plate high-pressure exhaust through hole 122 to be mixed with the refrigerant in the middle exhaust cavity 19, then enters the cavity of the auxiliary bearing side muffler 15 through the auxiliary bearing side cylinder high-pressure exhaust through hole 132 and the auxiliary bearing high-pressure exhaust through hole 142, finally the refrigerant in the cavity of the auxiliary bearing side muffler 15 flows into the high-pressure cavity 21, and then is subjected to oil-gas separation through the high-pressure exhaust cyclone separator 4 and discharged out.

When the oil tank works, under the action of pressure difference of refrigerants in the main bearing side cylinder 10, the auxiliary bearing side cylinder 13 and the high-pressure cavity 21, one part of lubricating oil in the oil tank 22 enters the unloading oil groove 145 from the auxiliary bearing radial oil hole 144, and the other part of lubricating oil enters the inner cavity of the intermediate partition plate 12 from the intermediate partition plate radial oil hole 127; with the rotation of the crankshaft 7, a part of the lubricating oil in the unloading oil groove 145 lubricates the auxiliary bearing 14 through the auxiliary bearing spiral oil groove 146, and the other part of the lubricating oil is transferred to the inner cavity of the intermediate partition plate 12 from the auxiliary bearing side spiral oil groove 74 on the crankshaft 7 and mixed, so that the lubrication between the auxiliary bearing side rolling piston 17 and the auxiliary bearing side eccentric part 72 is realized; lubricating oil in the inner cavity of the middle partition plate 12 is transferred to the main bearing 8 side from a main bearing side spiral oil groove 73 on the crankshaft 7, so that lubrication between the main bearing side rolling piston 16 and the main bearing side eccentric part 71 is realized; finally, under the action of the pressure difference of the refrigerant in the main bearing side air cylinder 10 and the low-pressure cavity 20, the lubricating oil migrates to the low-pressure cavity 20 to lubricate the main bearing 8, the lubricating oil entering the low-pressure cavity 20 realizes oil return along with air suction, and a rotary sealing structure is added at the matching section of the main bearing 8 and the crankshaft 7 to reduce the oil output.

Compared with the prior art, the invention has the following advantages:

1. through cylinder and shell cooperation, divide into low pressure cavity and high-pressure cavity with the compressor cavity, the oil bath is in the high pressure side, and lubricating oil can not be because pressure differential, jolt and the inclination change of compressor, and the migration is repeated between the pump body and motor, maintains the oil level height when reducing lubricating oil oiling volume, guarantees steady fuel feeding.

2. The differential pressure oil supply is realized from the oil supply holes on the auxiliary bearing and the intermediate partition plate by utilizing the pressure difference of the air suction and the air exhaust, rather than the oil supply through the central hole of the crankshaft, the additional oil suction assembly and the required centrifugal fan can be omitted, and the cost and the installation process are reduced.

3. The crankshaft does not need a machining center oil hole, is of a solid structure, has improved strength and rigidity, is more suitable for a structure with double cylinders and a large height ratio relative to the cylinder, and reduces the friction and wear of the bearing.

4. The main bearing side air cylinder and the auxiliary bearing side air cylinder both adopt a double exhaust structure to solve the problems of reliability and service life of a single exhaust valve caused by the lifting of the relative air cylinder height ratio, and meanwhile, the air cylinder adopts a non-circular design to further reduce the radial size of the compressor, so that the volume of the compressor is smaller and more compact, the bottom of the compressor is designed to be a plane, and the installation and the fixation are convenient.

5. The main bearing side air cylinder and the auxiliary bearing side adopt an axial air suction design and share an axial air suction hole, so that the air suction process is more uniform, the generation of air flow fluctuation is reduced, and the pressure loss and the air suction noise are reduced.

6. Compared with a common high-backpressure rotary compressor, the compressor controller can be arranged on the low-pressure side, and the suction cooling controller is utilized without additionally increasing a heat exchanger.

Drawings

Fig. 1 is a schematic structural view of a horizontal double-cylinder enthalpy-increasing rotary compressor for an electric vehicle air conditioner.

Fig. 2 is a schematic cross-sectional view a-a of the horizontal twin-cylinder enthalpy-increasing rotary compressor of fig. 1.

Fig. 3 is a schematic sectional view of a horizontal twin-cylinder enthalpy-increasing rotary compressor B-B shown in fig. 1.

Fig. 4 is a schematic view showing a suction structure of the main bearing side cylinder according to the embodiment of the present invention.

FIG. 5 shows a schematic structural view of a main bearing according to an embodiment of the present invention.

Fig. 6 is a schematic view of a secondary bearing structure according to an embodiment of the present invention.

Fig. 7 shows a schematic cross-sectional view of the secondary bearing a-a of fig. 6.

Fig. 8 is a schematic structural diagram of a middle partition according to an embodiment of the present invention.

Fig. 9 is a schematic sectional view of the intermediate partition a-a of fig. 8.

Fig. 10 is a schematic structural diagram of an intermediate cover plate according to an embodiment of the present invention.

Fig. 11 is a schematic view of a main bearing side muffler structure according to an embodiment of the present invention.

Fig. 12 is a schematic view of a crankshaft structure according to an embodiment of the present invention.

Fig. 13 is a refrigerant path diagram in the operation process of the horizontal double-cylinder enthalpy-increasing rotary compressor for the electric vehicle air conditioner.

Fig. 14 is a diagram illustrating an oil supply path of the horizontal type double-cylinder enthalpy-increasing rotary compressor for the electric vehicle air conditioner according to the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, the two-stage horizontal rotary compressor for the air conditioner of the electric vehicle of the present invention comprises a shell 1, a compressor controller 2 arranged outside the end surface of the shell 1, and a motor and a pump body arranged inside the shell 1; a low-pressure air suction pipe 3, a medium-pressure air suction pipe 18 and a high-pressure exhaust cyclone separator 4 are arranged on the shell 1; the motor is composed of a stator 5 and a rotor 6 arranged inside the stator 5 in a clearance mode; the pump body comprises a crankshaft 7, a main bearing 8, a main bearing side silencer 9, a main bearing side cylinder 10, a middle cover plate 11, a middle partition plate 12, an auxiliary bearing side cylinder 13, an auxiliary bearing 14, an auxiliary bearing side silencer 15, a main bearing side rolling piston 16, an auxiliary bearing side rolling piston 17, a middle exhaust cavity 19, a low pressure cavity 20 and a high pressure cavity 21; the crankshaft 7 is positioned in the center of the pump body and extends into the rotor 6 along the horizontal direction, a main bearing side rolling piston 16 is sleeved on a main bearing side eccentric part 71 of the crankshaft 7, an auxiliary bearing side rolling piston 17 is sleeved on an auxiliary bearing side eccentric part 72 of the crankshaft 7, the main bearing side eccentric part 71 of the crankshaft 7 is positioned in a main bearing side cylinder 10, the auxiliary bearing side eccentric part 72 of the crankshaft 7 is positioned in an auxiliary bearing side cylinder 13, and the main bearing side cylinder 10 is positioned at the side close to the motor; two end faces of the main bearing side cylinder 10 are respectively matched and sealed with a main bearing 8 and a middle cover plate 11, and a main bearing side silencer 9 is arranged on the main bearing 8; two end faces of the auxiliary bearing side cylinder 13 are respectively matched and sealed with the middle partition plate 12 and the auxiliary bearing 14, an auxiliary bearing side silencer 15 is installed on the auxiliary bearing 14, and the middle partition plate 12 and the middle cover plate 11 are matched and sealed to form a middle exhaust cavity 19; the end face of the main bearing side cylinder 10 connected with the main bearing 8 is matched with the annular end face 101 in the shell 1, meanwhile, the shell 1 and the wall face of the main bearing side cylinder 10 are in interference fit, so that the interior of the compressor shell is divided into two chambers, namely a low-pressure chamber 20 and a high-pressure chamber 21, wherein the low-pressure chamber 20 is enclosed by the shell 1 and the main bearing side cylinder 10 in the shell, the main bearing 8 and the main bearing side muffler 9, the stator 5 and the rotor 6, the high-pressure chamber 21 is enclosed by the shell 1 and the main bearing side cylinder 10 in the shell, a middle cover plate 11, a middle partition plate 12, an auxiliary bearing side cylinder 13, an auxiliary bearing 14 and an auxiliary bearing side muffler 15, and the oil pool 22 is positioned at the.

As shown in fig. 2 and 4, the main bearing side cylinder structure of the embodiment of the present invention is schematically shown. The main bearing side cylinder 10 is of a non-circular structure, and the wall surface of the main bearing side cylinder is provided with a main bearing side cylinder sliding vane sliding chute 100 and a main bearing side cylinder air suction structure 101, wherein the main bearing side cylinder air suction structure 101 consists of a main bearing side cylinder axial through hole 1011, a plurality of main bearing side cylinder radial air suction holes 1010 which are connected with the main bearing side cylinder axial through hole 1011 and the inner wall surface of the main bearing side cylinder 10; the height ratio (the ratio of the height to the diameter of the working volume of the cylinder) of the main bearing side cylinder 10 relative to the cylinder is 0.5-1.2, a double-exhaust structure is adopted to meet the requirements of air valve arrangement and reliability, and exhaust can be simultaneously performed on a cavity of the main bearing side muffler 9 and the middle exhaust cavity 19; the main bearing side cylinder 10 is provided with a main bearing side cylinder high-pressure exhaust through hole 102 in the axial direction of the wall surface for communicating the chamber of the main bearing side muffler 9 with the chamber of the auxiliary bearing side muffler 15. Meanwhile, the main bearing side cylinder 10 is used as a positioning and supporting structure of the pump body, and the bottom of the main bearing side cylinder is designed to be a plane, so that the main bearing side cylinder is convenient to mount and fix.

Fig. 3 is a schematic view of a secondary-bearing-side cylinder structure according to an embodiment of the present invention. The wall surface of the auxiliary bearing side cylinder 13 is processed with an auxiliary bearing side cylinder sliding vane sliding chute 130 and an auxiliary bearing side cylinder air suction structure 131, wherein the auxiliary bearing side cylinder air suction structure 131 consists of an auxiliary bearing side cylinder axial through hole 1310, a plurality of auxiliary bearing side cylinder radial air suction holes 1311 which are connected with the auxiliary bearing side cylinder axial through hole 1310 and the inner wall surface of the auxiliary bearing side cylinder 13; the height ratio (the ratio of the height to the diameter of the working volume of the cylinder) of the auxiliary bearing side cylinder 13 relative to the cylinder is 0.5-1.2, a double-exhaust structure is adopted to meet the requirements of air valve arrangement and reliability, and exhaust can be simultaneously performed on a cavity of the auxiliary bearing side muffler 15 and the middle exhaust cavity 19; the auxiliary bearing side cylinder 13 has an auxiliary bearing side cylinder high pressure exhaust through hole 132 formed in the wall surface thereof in the axial direction for communicating the chamber of the main bearing side muffler 9 with the chamber of the auxiliary bearing side muffler 15.

FIG. 5 is a schematic view of a main bearing structure according to an embodiment of the present invention. A main bearing exhaust hole 81, a main bearing high-pressure exhaust through hole 82 for communicating a cavity of the main bearing side muffler 9 with a cavity of the auxiliary bearing side muffler 15 and an annular plane 83 matched with the main bearing side muffler 9 are processed on the main bearing 8; the main bearing 8 and the main bearing side cylinder 10 are non-circular in shape, and the main bearing radial protrusion 84 covers the sliding vane slot 100 in the main bearing side cylinder 10 to prevent the lubricant and the refrigerant from leaking to the low pressure chamber 20.

As shown in fig. 6 and 7, the structure of the secondary bearing according to the embodiment of the present invention is schematically illustrated. The matching part of the auxiliary bearing 14 and the auxiliary bearing side cylinder 13 is of a non-circular structure, an auxiliary bearing exhaust hole 141 is processed on the matching surface, and an auxiliary bearing high-pressure exhaust through hole 142 for communicating a cavity of the main bearing side muffler 9 and a cavity of the auxiliary bearing side muffler 15 is processed in the axial direction; the radially protruding portion 143 of the sub-bearing 14 is immersed in the oil sump 22, an upper sub-bearing radial oil hole 144 communicating with an unloading oil groove 145 inside the sub-bearing 14 is formed in the radially protruding portion 143 of the sub-bearing 14, and a sub-bearing screw oil groove 146 is formed in the inner surface of the sub-bearing 14.

Fig. 8 and 9 are schematic views of the structure of the intermediate partition plate according to the embodiment of the present invention. A middle partition exhaust hole 121, a middle partition high-pressure exhaust through hole 122 for communicating the chamber of the main bearing side muffler 9 with the chamber of the auxiliary bearing side muffler 15, a middle partition low-pressure suction through hole 123 for communicating the low-pressure chamber 20 with the auxiliary bearing side cylinder 13, and a middle partition positioning hole 126 assembled with the auxiliary bearing side cylinder 13 are formed in the middle partition 12 in the axial direction; the middle clapboard 12 is provided with a middle clapboard air-supplementing pipe jack 124 and a middle clapboard radial oil hole 127 in the radial direction, and the middle clapboard 12 is provided with a middle clapboard air-supplementing through hole 125 which penetrates through the air pipe jack 124 in the axial direction.

Fig. 10 is a schematic view of an intermediate cover plate according to an embodiment of the present invention. An intermediate cover plate exhaust hole 111, an intermediate cover plate high-pressure exhaust through hole 112 for communicating the chamber of the main bearing side muffler 9 with the chamber of the sub bearing side muffler 15, an intermediate cover plate low-pressure suction through hole 113 for communicating the low-pressure chamber 20 with the sub bearing side cylinder 13, an intermediate cover plate positioning hole 114 assembled with the main bearing side cylinder 10, and an intermediate cover plate air supplement through hole 115 are formed in the intermediate cover plate 11 in the axial direction.

Fig. 11 is a schematic view of a main bearing side muffler structure according to an embodiment of the present invention. The main bearing side muffler 9 is provided with a turned edge 90 which is matched and sealed with the annular plane 83 on the main bearing 8, so that the cavity of the main bearing side muffler 9 is isolated from the low-pressure cavity 20 to form an independent cavity.

Fig. 12 is a schematic view of a crankshaft structure according to an embodiment of the present invention. The crankshaft 7 is of a solid eccentric structure, and a main bearing side helical oil groove 73 is formed in a main bearing side eccentric portion 71 of the crankshaft, and an auxiliary bearing side helical oil groove 74 is formed in an auxiliary bearing side eccentric portion 72 of the crankshaft.

Firstly, a stator 5 of a motor is electrified and started through a compressor controller 2, and a rotor 6 rotates; the rotor 6 rotates the crankshaft 7, the rotation of the crankshaft 7 rotates the main bearing side rolling piston 16 eccentrically in the main bearing side cylinder 10, and the sub bearing side rolling piston 17 eccentrically rotates in the sub bearing side cylinder 13.

With reference to fig. 13, a refrigerant path when the horizontal type double-cylinder enthalpy-increasing rotary compressor for the air conditioner of the electric vehicle of the present invention operates is shown by a solid arrow in the figure, a low-pressure refrigerant at an outlet of an evaporator of the air conditioner system of the electric vehicle enters the low-pressure chamber 20 from the low-pressure suction pipe 3 on the housing 1, cools the compressor controller 2 outside an end surface of the housing 1, and cools a motor through a gap between the stator 5 and the rotor 6; after the low-pressure refrigerant enters the axial through hole 1011 of the main bearing side cylinder, a part of the refrigerant enters the main bearing side cylinder 10 from the radial suction hole 1010 of the main bearing side cylinder, and the other part of the refrigerant continues to enter the auxiliary bearing side cylinder 13 through the low-pressure suction through hole 113 of the middle cover plate, the low-pressure suction through hole 123 of the middle clapboard and the suction structure 131 of the auxiliary bearing side cylinder, so that the suction process is realized; after a medium-pressure refrigerant at the outlet of an economizer or a flash tank of an air conditioning system of the electric automobile enters a middle partition plate air supplementing pipe jack 124 through a medium-pressure air suction pipe 18 on the shell 1, the medium-pressure refrigerant respectively enters an auxiliary bearing side cylinder 13 through a middle partition plate air supplementing through hole 125, and an intermediate cover plate air supplementing through hole 115 enters a main bearing side cylinder 10, so that an air supplementing process is realized; with the rotation of the crankshaft 7, the high-pressure refrigerant in the main bearing side cylinder 10 is discharged into the cavity of the main bearing muffler 9 through the main bearing exhaust hole 81, and is simultaneously discharged into the middle exhaust cavity 19 through the middle cover plate exhaust hole 111, and the high-pressure refrigerant in the auxiliary bearing side cylinder 13 is discharged into the cavity of the auxiliary bearing side muffler 15 through the auxiliary bearing exhaust hole 141, and is simultaneously discharged into the middle exhaust cavity 19 through the middle partition plate exhaust hole 121; the high-pressure refrigerant in the cavity of the main bearing side muffler 9 sequentially passes through the main bearing high-pressure exhaust through hole 82, the main bearing side cylinder high-pressure exhaust through hole 102, the middle cover plate high-pressure exhaust through hole 112 and the middle partition plate high-pressure exhaust through hole 122 to be mixed with the refrigerant in the middle exhaust cavity 19, then enters the cavity of the auxiliary bearing side muffler 15 through the auxiliary bearing side cylinder high-pressure exhaust through hole 132 and the auxiliary bearing high-pressure exhaust through hole 142, finally the refrigerant in the cavity of the auxiliary bearing side muffler 15 flows into the high-pressure cavity 21, and then is subjected to oil-gas separation through the high-pressure exhaust cyclone separator 4 and discharged out.

FIG. 14 is a diagram of an oil supply path according to the present invention, in which a portion of the lubricating oil in the oil sump 22 flows through the auxiliary bearing radial oil hole 144 into the unloading oil groove 145 and a portion of the lubricating oil flows through the intermediate partition plate radial oil hole 127 into the inner cavity of the intermediate partition plate 12 under the pressure difference between the refrigerant in the main bearing side cylinder 10, the refrigerant in the auxiliary bearing side cylinder 13 and the refrigerant in the high pressure chamber 21; with the rotation of the crankshaft 7, a part of the lubricating oil in the unloading oil groove 145 lubricates the auxiliary bearing 14 through the auxiliary bearing spiral oil groove 146, and the other part of the lubricating oil is transferred to the inner cavity of the intermediate partition plate 12 from the auxiliary bearing side spiral oil groove 74 on the crankshaft 7 and mixed, so that the lubrication between the auxiliary bearing side rolling piston 17 and the auxiliary bearing side eccentric part 72 is realized; lubricating oil in the inner cavity of the middle partition plate 12 is transferred to the main bearing 8 side from a main bearing side spiral oil groove 73 on the crankshaft 7, so that lubrication between the main bearing side rolling piston 16 and the main bearing side eccentric part 71 is realized; finally, under the action of the pressure difference of the refrigerant in the main bearing side cylinder 10 and the low-pressure cavity 20, the lubricating oil migrates to the low-pressure cavity 20 to lubricate the main bearing 8, and the lubricating oil entering the low-pressure cavity 20 realizes oil return along with air suction.