CN210949125U - Horizontal double-cylinder enthalpy-increasing rotary compressor for electric automobile air conditioner - Google Patents

Abstract

A horizontal double-cylinder enthalpy-increasing rotary compressor for electric vehicle air-conditioning, the compressor pump body adopts a parallel double-cylinder structure, the relative cylinder height ratio of the two cylinders is large, and both adopt a double-exhaust structure, which reduces the diameter of the cylinder at the same time. To meet the air valve layout and reliability requirements; the main bearing side cylinder adopts a non-circular design as a support, which is sealed and fixed with the annular end face inside the middle section of the casing, and the inside of the compressor casing is divided into a low-pressure cavity and a high-pressure cavity. The motor is in the low-pressure chamber, and the oil pool is in the high-pressure chamber; there are oil supply holes in the radially extending part of the auxiliary bearing of the pump body and the middle partition plate, and the auxiliary bearing and the eccentric part of the crankshaft are provided with a spiral oil groove, which uses the suction and exhaust pressure difference to remove the lubricating oil. The auxiliary bearing unloading oil groove and the inner cavity of the intermediate partition plate are supplied from the oil pool, and then the lubricating oil is supplied to the main bearing through the spiral oil groove; the utility model can reduce the radial dimension of the enthalpy-increasing rotary compressor to meet on-board requirements, and is beneficial to the Reduce the amount of oil sealed in the compressor, keep the oil level stable, and overcome the oil supply problem of the existing horizontal rotary compressor.

Description

A horizontal double-cylinder enthalpy-increasing rotary compressor for electric vehicle air conditioner

technical field

The utility model relates to a compressor for electric vehicle air conditioners, in particular to a horizontal double-cylinder enthalpy-increasing rotary compressor for electric vehicle air conditioners.

Background technique

At present, although the electric vehicle industry is developing rapidly, the energy consumption of the air-conditioning system has not been effectively solved. In winter, when PTC is used for heating, the operating mileage of electric vehicles is seriously attenuated. Especially under low temperature conditions, the heat load requirements of the cockpit and the battery need to be met at the same time. The above problems are more prominent.

With the application of frequency conversion technology and air-enhancing enthalpy heat pump, the performance and energy efficiency ratio of electric vehicle air-conditioning system under severe working conditions have been effectively improved. The existing air-conditioning compressors for electric vehicles are mainly scroll compressors, and the quasi-two-stage compression cycle is realized by opening air-supplying and enthalpy-increasing holes in the stationary scroll. However, the electric scroll compressor has a long development cycle, high production cost, large initial investment and high cost.

In addition to electric scroll compressors, electric rotary compressors are also a feasible technical solution. Rotary compressors have simple structure, high efficiency, good reliability, and low processing costs. In the air conditioner and heat pump markets, the scope of use of rotary compressors is larger than that of scroll compressors. These are due to the above-mentioned advantages of better combination of performance, reliability and cost. Rotary compressors can achieve quasi-two-stage circulation either through piston cutting or check valve structure. However, electric vehicles have restrictions on the installation space of the compressor, and it is necessary to increase the relative cylinder height ratio to reduce its radial size. However, the dual-cylinder dual-exhaust structure is difficult to meet the exhaust valve layout requirements of the compressor cylinder; at the same time, the horizontal type The oil supply problem of rotary compressors under variable working conditions and different inclination angles still needs to be solved.

SUMMARY OF THE INVENTION

In order to overcome the above-mentioned problems in the prior art, the purpose of this utility model is to provide a horizontal double-cylinder enthalpy-increasing rotary compressor for electric vehicle air conditioners, which can further reduce the radial dimension of the double-cylinder enthalpy-increasing rotary compressor. , to meet the requirements of electric vehicles for compressor installation space; at the same time, it overcomes the oil supply problem of horizontal rotary compressors, improves its lubricating ability under variable working conditions and variable inclination angles, and ensures the reliability of on-board compressors.

In order to achieve the above purpose, the utility model adopts the following technical solutions:

A horizontal double-cylinder enthalpy-increasing rotary compressor for an electric vehicle air conditioner, comprising a casing 1, a compressor controller 2 arranged outside the end face of the casing 1, and a motor and a pump body arranged inside the casing 1;

The low-pressure suction pipe 3, the medium-pressure suction pipe 18, and the high-pressure exhaust cyclone 4 are provided on the casing 1;

The motor is composed of a stator 5 and a rotor 6 with a gap arranged inside the stator 5;

The pump body includes crankshaft 7, main bearing 8, main bearing side muffler 9, main bearing side cylinder 10, middle cover plate 11, middle partition plate 12, auxiliary bearing side cylinder 13, auxiliary bearing 14, auxiliary bearing side muffler 15, The main bearing side rolling piston 16, the auxiliary bearing side rolling piston 17, the intermediate exhaust chamber 19, the low pressure chamber 20 and the high pressure chamber 21; the crankshaft 7 is located in the center of the pump body and extends into the rotor 6 in the horizontal direction, and the main bearing of the crankshaft 7 The main bearing side rolling piston 16 is sleeved on the side eccentric part 71, the auxiliary bearing side rolling piston 17 is sleeved on the auxiliary bearing side eccentric part 72 of the crankshaft 7, and the main bearing side eccentric part 71 of the crankshaft 7 is located in the main bearing side cylinder 10, The eccentric part 72 of the auxiliary bearing side of the crankshaft 7 is located in the auxiliary bearing side cylinder 13, and the main bearing side cylinder 10 is on the side close to the motor; the two end faces of the main bearing side cylinder 10 are respectively connected to the main bearing 8 and the middle cover 11. Cooperative sealing, the main bearing side muffler 9 is installed on the main bearing 8; the two end faces of the auxiliary bearing side cylinder 13 are respectively matched with the middle partition plate 12 and the auxiliary bearing 14 for sealing, and the auxiliary bearing side muffler 15 is installed on the auxiliary bearing 14, The middle partition plate 12 and the middle cover plate 11 cooperate and seal to form the 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 1001 inside the shell 1, and the shell 1 and the main bearing are at the same time. The wall surface of the side cylinder 10 adopts an interference fit, so that the interior of the compressor casing is divided into two chambers, a low-pressure chamber 20 and a high-pressure chamber 21, wherein the low-pressure chamber 20 consists of the casing 1 and the main bearing inside the side cylinder 10, the main bearing 8 and the main bearing side muffler 9, the stator 5 and the rotor 6 are enclosed, the high pressure chamber 21 is composed of the casing 1 and the main bearing side cylinder 10 inside, the middle cover plate 11, the middle partition plate 12, the auxiliary bearing side cylinder 13, the auxiliary bearing 14 , The auxiliary bearing side muffler 15 is surrounded, and a sealing ring is added on the annular end surface 1001 and the outer wall surface of the main bearing side cylinder 10 to improve air tightness. The oil pool 22 is at the bottom of the high pressure chamber 21 .

The main bearing side cylinder 10 adopts a non-circular structure, and its wall surface is machined with the main bearing side cylinder slide chute 100 and the main bearing side cylinder air intake structure 101, wherein the main bearing side cylinder air intake structure 101 is composed of the main bearing side cylinder. Axial through hole 1011 is formed by connecting the axial through hole 1011 of the main bearing side cylinder with a number of radial suction holes 1010 of the main bearing side cylinder on the inner wall surface of the main bearing side cylinder 10; the main bearing side cylinder 10 is opposite to the cylinder The height ratio is the ratio of the height to the diameter of the working volume of the cylinder, which is 0.5 to 1.2. In order to meet the requirements of valve arrangement and reliability, a double exhaust structure is adopted, which can exhaust the main bearing side muffler 9 chamber and the intermediate exhaust chamber 19 at the same time. ; The main bearing side cylinder 10 wall is axially provided with a main bearing side cylinder high pressure exhaust through hole 102, which is used to communicate with the main bearing side muffler 9 chamber and the auxiliary bearing side muffler 15 chamber. At the same time, the cylinder 10 on the main bearing side is used as the positioning support structure of the pump body, and its bottom is designed to be flat, which is convenient for installation and fixation.

The auxiliary bearing side cylinder 13 is machined with an auxiliary bearing side cylinder sliding plate chute 130 and an auxiliary bearing side cylinder air suction structure 131, wherein the auxiliary bearing side cylinder air suction structure 131 is connected by an auxiliary bearing side cylinder axial through hole 1310. The auxiliary bearing side cylinder axial through hole 1310 is composed of a number of auxiliary bearing side cylinder radial suction holes 1311 on the inner wall surface of the auxiliary bearing side cylinder 13; the ratio of the auxiliary bearing side cylinder 13 to the cylinder height is the working volume of the cylinder The ratio of height to diameter is 0.5 to 1.2. In order to meet the requirements of valve arrangement and reliability, a double exhaust structure is adopted, which can exhaust to the auxiliary bearing side muffler 15 chamber and the intermediate exhaust cavity 19 at the same time; the auxiliary bearing side cylinder 13 wall surface Axial bearing side cylinder high pressure exhaust through hole 132 is axially opened for communicating with the main bearing side muffler 9 cavity and the auxiliary bearing side muffler 15 cavity.

The main bearing 8 is machined with a main bearing exhaust hole 81, which is used to communicate with the main bearing high-pressure exhaust through hole 82 between the chamber of the main bearing side muffler 9 and the chamber of the auxiliary bearing side muffler 15, which is in phase with the main bearing side muffler 9. The mating annular plane 83; the mating part of the main bearing 8 and the main bearing side cylinder 10 is a non-circular structure, and the main bearing radially protruding part 84 is used to cover the sliding vane chute 100 in the main bearing side cylinder 10 to prevent lubricating oil And the refrigerant leaks to the low pressure chamber 20.

The matching part of the auxiliary bearing 14 and the auxiliary bearing side cylinder 13 is a non-circular structure, the auxiliary bearing exhaust hole 141 is machined on the matching surface, and the axial direction is machined to communicate with the main bearing side muffler 9 chamber and the auxiliary bearing side. The auxiliary bearing high pressure exhaust through hole 142 in the chamber of the muffler 15; the radially protruding part 143 of the auxiliary bearing 14 is immersed in the oil pool 22, and the radially protruding part 143 of the auxiliary bearing 14 is processed with the upper auxiliary bearing radial oil hole 144 communicates with To the unloading oil groove 145 inside the auxiliary bearing 14 , at the same time, the inner surface of the auxiliary bearing 14 is machined with an auxiliary bearing spiral oil groove 146 .

The intermediate partition plate 12 is machined with an intermediate partition plate exhaust hole 121 in the axial direction, which is used to communicate with the intermediate partition plate high-pressure exhaust through hole 122 of the chamber of the main bearing side muffler 9 and the chamber of the auxiliary bearing side muffler 15. The low-pressure suction through hole 123 of the intermediate partition plate connecting the low-pressure chamber 20 and the auxiliary bearing side cylinder 13, and the intermediate partition plate positioning hole 126 assembled with the auxiliary bearing side cylinder 13; the intermediate partition plate 12 is machined in the radial direction. The air supply pipe insertion hole 124 and the radial oil hole 127 in the middle partition plate are axially machined with the middle partition plate air supply through hole 125 passing through the middle partition plate air supply pipe insertion hole 124 .

The middle cover plate 11 is machined with a middle cover plate exhaust hole 111 in the axial direction, which is used to communicate with the middle cover plate high pressure exhaust hole 112 of the chamber of the main bearing side muffler 9 and the chamber of the auxiliary bearing side muffler 15. There are low pressure air intake through holes 113 in the middle cover that communicate with the low pressure chamber 20 and the secondary bearing side cylinder 13 , the middle cover positioning holes 114 assembled with the main bearing side cylinder 10 , and the middle cover air supply through holes 115 .

The main bearing side muffler 9 is processed with a crimp 90 to cooperate and seal with the annular plane 83 on the main bearing 8, so that the main bearing side muffler 9 chamber is isolated from the low pressure chamber 20 to form an independent chamber.

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

The working method of the above-mentioned horizontal double-cylinder enthalpy-increasing rotary compressor for electric vehicle air-conditioning, first, through the compressor controller 2, the stator 5 of the motor is energized and started, and the rotor 6 rotates; the rotor 6 drives the crankshaft 7 to rotate, and the rotation of the crankshaft 7 drives The main bearing side rolling piston 16 rotates 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 .

The above-mentioned horizontal double-cylinder enthalpy-increasing rotary compressor for electric vehicle air-conditioning is used in the electric vehicle air-conditioning system. During operation, the low-pressure refrigerant at the outlet of the evaporator of the electric vehicle air-conditioning system enters the low-pressure chamber 20 from the low-pressure suction pipe 3 on the casing 1, and is discharged into the low-pressure cavity 20. The compressor controller 2 on the outer side of the end face of the shell 1 is cooled, and then the motor is cooled through the gap between the stator 5 and the rotor 6; after the low-pressure refrigerant enters the axial through hole 1011 of the cylinder on the main bearing side, a part of the refrigerant is discharged from the cylinder on the main bearing side. The radial suction hole 1010 enters the main bearing side cylinder 10, and another part of the refrigerant continues to enter the auxiliary bearing through the low pressure suction through hole 113 of the intermediate cover plate, the low pressure suction through hole 123 of the intermediate partition plate, and the suction structure 131 of the cylinder on the auxiliary bearing side The side cylinder 13 realizes the suction process; the medium-pressure refrigerant from the economizer or flasher outlet of the electric vehicle air-conditioning system enters the middle-partition plate air-supply pipe hole 124 through the medium-pressure suction pipe 18 on the casing 1, and then passes through the middle The air supply through hole 125 of the partition plate enters the auxiliary bearing side cylinder 13, and the intermediate cover plate air supply through hole 115 enters the main bearing side cylinder 10 to realize the air supply process; with the rotation of the crankshaft 7, the high pressure refrigerant in the main bearing side cylinder 10 is replaced by The main bearing exhaust hole 81 is discharged into the chamber of the main bearing muffler 9, and at the same time, it is discharged into the intermediate exhaust chamber 19 through the exhaust hole 111 of the intermediate cover plate, and the high-pressure refrigerant in the cylinder 13 on the auxiliary bearing side is discharged through the auxiliary bearing exhaust hole 141. into the chamber of the auxiliary bearing side muffler 15, and at the same time, it is discharged into the intermediate exhaust chamber 19 from the exhaust hole 121 of the intermediate partition plate; the high pressure refrigerant in the chamber of the main bearing side muffler 9 passes through the main bearing high pressure exhaust through hole 82, the main bearing The high-pressure exhaust through hole 102 of the side cylinder, the high-pressure exhaust through-hole 112 of the intermediate cover, and the high-pressure exhaust through-hole 122 of the intermediate partition plate are mixed with the refrigerant in the intermediate exhaust chamber 19, and then pass through the high-pressure exhaust through the auxiliary bearing side cylinder. The hole 132 and the auxiliary bearing high pressure exhaust through hole 142 enter the chamber of the auxiliary bearing side muffler 15, and finally the refrigerant in the auxiliary bearing side muffler 15 chamber flows into the high pressure chamber 21, and then passes through the high pressure exhaust cyclone 4 to realize oil and gas separation and discharge. compressor.

During operation, the lubricating oil in the oil pool 22 enters the unloading oil groove 145 from the radial oil hole 144 of the auxiliary bearing under the action of the refrigerant pressure difference in the cylinder 10 on the main bearing side, the cylinder 13 on the auxiliary bearing side and the high pressure chamber 21. The other part enters the inner cavity of the intermediate partition plate 12 through the radial oil hole 127 of the intermediate partition plate; with the rotation of the crankshaft 7, part of the lubricating oil in the unloading oil groove 145 lubricates the auxiliary bearing 14 through the auxiliary bearing screw oil groove 146, and the other part is lubricated by the crankshaft 7. The auxiliary bearing side helical oil groove 74 migrates to the inner cavity of the middle partition plate 12 and mixes, so as to realize the lubrication between the auxiliary bearing side rolling piston 17 and the auxiliary bearing side eccentric part 72; The main bearing side helical oil groove 73 on the main bearing side migrates to the main bearing 8 side to realize the lubrication between the main bearing side rolling piston 16 and the main bearing side eccentric part 71; finally, the refrigerant pressure difference in the main bearing side cylinder 10 and the low pressure chamber 20 Under the action, the lubricating oil migrates to the low pressure chamber 20 to lubricate the main bearing 8, the lubricating oil entering the low pressure chamber 20 realizes the oil return with the suction, and a rotating sealing structure is added in the matching section of the main bearing 8 and the crankshaft 7 to reduce the output. oil quantity.

Compared with the prior art, the utility model has the following advantages:

1. The compressor cavity is divided into a low-pressure cavity and a high-pressure cavity through the cooperation of the cylinder and the shell. The oil pool is on the high-pressure side, and the lubricating oil will not change between the pump body and the compressor due to pressure difference, bumps and the inclination angle of the compressor. Repeated migration between motors reduces the amount of lubricating oil injected while maintaining the oil level to ensure smooth oil supply.

2. Use the suction and exhaust pressure difference to supply oil with differential pressure from the oil hole on the auxiliary bearing and the middle partition plate, instead of applying oil through the center hole of the crankshaft, which can reduce the extra oil suction components and the required centrifugal fan, reducing the cost and installation process.

3. The crankshaft does not need to machine the oil hole in the center. It is a solid structure, and its strength and rigidity are improved. It is more suitable for the structure with a large height ratio of the double cylinder to the cylinder to reduce the occurrence of bearing friction and wear.

4. Both the main bearing side cylinder and the auxiliary bearing side cylinder adopt a double exhaust structure to solve the reliability and life problems of the single exhaust valve caused by the increase of the relative cylinder height ratio. At the same time, the cylinder adopts a non-circular design to further reduce the radial size of the compressor , making it smaller and more compact, and the bottom is designed to be flat, which is easy to install and fix.

5. The cylinder on the main bearing side and the auxiliary bearing side are designed with axial suction and share the axial suction hole, which makes the suction process more uniform, reduces the generation of airflow fluctuations, reduces pressure loss and suction noise.

6. Compared with the commonly used high back pressure rotary compressor, the compressor controller can be arranged on the low pressure side, and the suction cooling controller is used, and no additional heat exchanger is required.

Description of drawings

FIG. 1 is a schematic structural diagram of a horizontal double-cylinder enthalpy-increasing rotary compressor for an electric vehicle air conditioner of the present invention.

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

FIG. 3 is a schematic cross-sectional view of the horizontal double-cylinder enthalpy-increasing rotary compressor B-B of FIG. 1 .

FIG. 4 is a schematic diagram showing the air intake structure of the main bearing side cylinder according to the embodiment of the present invention.

FIG. 5 is a schematic structural diagram of the main bearing according to the embodiment of the present invention.

FIG. 6 is a schematic diagram showing the structure of the auxiliary bearing according to the embodiment of the present invention.

FIG. 7 is a schematic cross-sectional view of the auxiliary bearing A-A of FIG. 6 .

FIG. 8 is a schematic diagram showing the structure of the middle partition plate according to the embodiment of the present invention.

FIG. 9 is a schematic cross-sectional view of the middle partition plate 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 structural diagram of a main bearing side muffler according to an embodiment of the present invention.

FIG. 12 is a schematic diagram of a crankshaft structure according to an embodiment of the present invention.

FIG. 13 is a refrigerant path diagram during the operation of the horizontal double-cylinder enthalpy-increasing rotary compressor for electric vehicle air conditioner of the present invention.

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

Detailed ways

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

As shown in FIG. 1 , a two-stage horizontal rotary compressor for an electric vehicle air conditioner of the present invention includes a casing 1 , a compressor controller 2 arranged outside the end face of the casing 1 , and a motor arranged inside the casing 1 . and the pump body; the low-pressure suction pipe 3, the medium-pressure suction pipe 18 and the high-pressure exhaust cyclone 4 provided on the casing 1; The pump body includes crankshaft 7, main bearing 8, main bearing side muffler 9, main bearing side cylinder 10, middle cover plate 11, middle partition plate 12, auxiliary bearing side cylinder 13, auxiliary bearing 14, auxiliary bearing side muffler 15. The main bearing side rolling piston 16, the auxiliary bearing side rolling piston 17, the intermediate exhaust chamber 19, the low pressure chamber 20 and the high pressure chamber 21; the crankshaft 7 is located in the center of the pump body and extends into the rotor 6 in the horizontal direction. The main bearing side eccentric part 71 is sleeved with the main bearing side rolling piston 16, the auxiliary bearing side eccentric part 72 of the crankshaft 7 is sleeved with the auxiliary bearing side rolling piston 17, and the main bearing side eccentric part 71 of the crankshaft 7 is located in the main bearing side cylinder 10 Inside, the eccentric part 72 of the auxiliary bearing side of the crankshaft 7 is located in the auxiliary bearing side cylinder 13, and the main bearing side cylinder 10 is on the side close to the motor; The cover plate 11 is matched and sealed, and the main bearing side muffler 9 is installed on the main bearing 8; the 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, and the auxiliary bearing side muffler is installed on the auxiliary bearing 14. 15. The middle partition plate 12 and the middle cover plate 11 cooperate and seal to form the middle exhaust chamber 19; the end face of the main bearing side cylinder 10 connected with the main bearing 8 is matched with the annular end face 1001 inside the shell 1, and the shell 1 and the The wall surface of the main bearing side cylinder 10 adopts an interference fit, thereby dividing the inside of the compressor casing into two chambers, a low pressure chamber 20 and a high pressure chamber 21, wherein the low pressure chamber 20 consists of the casing 1 and the inner main bearing side cylinder 10, the main The bearing 8, the main bearing side muffler 9, the stator 5 and the rotor 6 are enclosed. The high pressure chamber 21 is composed of the casing 1 and the main bearing side cylinder 10, the middle cover plate 11, the middle partition plate 12, the auxiliary bearing side cylinder 13, the auxiliary The bearing 14 and the auxiliary bearing side muffler 15 are enclosed, and the oil pool 22 is at the bottom of the high pressure chamber 21 .

As shown in FIG. 2 and FIG. 4 , it is a schematic structural diagram of the main bearing side cylinder according to the embodiment of the present invention. The main bearing side cylinder 10 adopts a non-circular structure, and its wall surface is machined with a main bearing side cylinder slide chute 100 and a main bearing side cylinder air intake structure 101, wherein the main bearing side cylinder air intake structure 101 consists of the main bearing side cylinder. Axial through hole 1011 is formed by connecting the axial through hole 1011 of the main bearing side cylinder with a number of radial suction holes 1010 of the main bearing side cylinder on the inner wall surface of the main bearing side cylinder 10; the main bearing side cylinder 10 is opposite to the cylinder The height ratio (the ratio of the height to the diameter of the working volume of the cylinder) is 0.5 to 1.2. In order to meet the requirements of valve arrangement and reliability, a double exhaust structure is adopted, which can be discharged to the 9 chambers of the main bearing side muffler and the 19 middle exhaust chambers at the same time. The main bearing side cylinder 10 has an axial high pressure exhaust through hole 102 on the wall surface of the main bearing side cylinder, which is used to communicate with the main bearing side muffler 9 chamber and the auxiliary bearing side muffler 15 chamber. At the same time, the cylinder 10 on the main bearing side is used as the positioning support structure of the pump body, and its bottom is designed to be flat, which is convenient for installation and fixation.

As shown in FIG. 3 , it is a schematic structural diagram of the cylinder on the side of the auxiliary bearing according to the embodiment of the present invention. The auxiliary bearing side cylinder 13 is machined with an auxiliary bearing side cylinder sliding plate chute 130 and an auxiliary bearing side cylinder air suction structure 131, wherein the auxiliary bearing side cylinder air suction structure 131 is connected by an auxiliary bearing side cylinder axial through hole 1310. The auxiliary bearing side cylinder axial through hole 1310 is composed of a number of auxiliary bearing side cylinder radial suction holes 1311 on the inner wall surface of the auxiliary bearing side cylinder 13; the relative cylinder height ratio of the auxiliary bearing side cylinder 13 (the working volume of the cylinder) The ratio of height to diameter) is 0.5 to 1.2. In order to meet the requirements of valve arrangement and reliability, a double exhaust structure is adopted, which can exhaust to the auxiliary bearing side muffler 15 chamber and the intermediate exhaust cavity 19 at the same time; auxiliary bearing side cylinder 13 A high-pressure exhaust through hole 132 of the secondary bearing side cylinder is axially opened on the wall surface, which is used to communicate with the chamber of the main bearing side muffler 9 and the chamber of the secondary bearing side muffler 15 .

As shown in FIG. 5 , it is a schematic diagram of the structure of the main bearing according to the embodiment of the present invention. The main bearing 8 is machined with a main bearing exhaust hole 81, which is used to communicate the main bearing high pressure exhaust hole 82 between the main bearing side muffler 9 chamber and the auxiliary bearing side muffler 15 chamber, which is in phase with the main bearing side muffler 9. The mating annular plane 83; the mating part of the main bearing 8 and the main bearing side cylinder 10 is a non-circular structure, and the main bearing radially protruding part 84 is used to cover the sliding vane chute 100 in the main bearing side cylinder 10 to prevent lubricating oil And the refrigerant leaks to the low pressure chamber 20.

As shown in FIG. 6 and FIG. 7 , it is a schematic diagram of the structure of the auxiliary bearing according to the embodiment of the present invention. The matching part of the auxiliary bearing 14 and the auxiliary bearing side cylinder 13 is a non-circular structure, the auxiliary bearing exhaust hole 141 is machined on the matching surface, and the axial direction is machined to connect the main bearing side muffler 9 chamber and the auxiliary bearing side The auxiliary bearing high pressure exhaust through hole 142 in the chamber of the muffler 15; the radially protruding part 143 of the auxiliary bearing 14 is immersed in the oil pool 22, and the radially protruding part 143 of the auxiliary bearing 14 is processed with the upper auxiliary bearing radial oil hole 144 communicates with To the unloading oil groove 145 inside the auxiliary bearing 14 , at the same time, the inner surface of the auxiliary bearing 14 is machined with an auxiliary bearing spiral oil groove 146 .

As shown in FIG. 8 and FIG. 9 , it is a schematic structural diagram of a middle partition plate according to an embodiment of the present invention. The intermediate partition plate 12 is machined with an intermediate partition plate exhaust hole 121 in the axial direction, which is used to communicate with the intermediate partition plate high-pressure exhaust through hole 122 of the chamber of the main bearing side muffler 9 and the chamber of the auxiliary bearing side muffler 15. The low-pressure suction through hole 123 of the intermediate partition plate connecting the low-pressure chamber 20 and the auxiliary bearing side cylinder 13, and the intermediate partition plate positioning hole 126 assembled with the auxiliary bearing side cylinder 13; the intermediate partition plate 12 is machined in the radial direction. The air supply pipe insertion hole 124, the radial oil hole 127 in the middle partition plate, and the middle partition plate 12 is axially machined with a middle partition plate air supply through hole 125 passing through the middle partition plate air supply pipe insertion hole 124.

As shown in FIG. 10 , it is a schematic structural diagram of an intermediate cover plate according to an embodiment of the present invention. The middle cover plate 11 is machined with a middle cover plate exhaust hole 111 in the axial direction, which is used to communicate with the middle cover plate high pressure exhaust hole 112 of the chamber of the main bearing side muffler 9 and the chamber of the auxiliary bearing side muffler 15, The middle cover plate low pressure air intake through hole 113 for connecting the low pressure chamber 20 and the auxiliary bearing side cylinder 13, the middle cover plate positioning hole 114 assembled with the main bearing side cylinder 10, and the middle cover plate air supply through hole 115.

As shown in FIG. 11 , it is a schematic structural diagram of the main bearing side muffler according to the embodiment of the present invention. The main bearing side muffler 9 is processed with a crimp 90 to cooperate and seal with the annular plane 83 on the main bearing 8, so that the main bearing side muffler 9 chamber is isolated from the low pressure chamber 20 to form an independent chamber.

As shown in FIG. 12 , it is a schematic diagram of a crankshaft structure according to an embodiment of the present invention. The crankshaft 7 is a solid eccentric structure, and the eccentric portion 71 of the main bearing side is machined with a main bearing side helical oil groove 73 , and the eccentric portion 72 of the auxiliary bearing side is machined with an auxiliary bearing side helical oil groove 74 .

The working method of the above-mentioned horizontal double-cylinder enthalpy-increasing rotary compressor for electric vehicle air-conditioning, first, through the compressor controller 2, the stator 5 of the motor is energized and started, and the rotor 6 rotates; the rotor 6 drives the crankshaft 7 to rotate, and the rotation of the crankshaft 7 drives The main bearing side rolling piston 16 rotates 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 .

13, the refrigerant path of the horizontal double-cylinder enthalpy-increasing rotary compressor for electric vehicle air-conditioning of the present invention is shown by the solid line arrow in the figure. 1. The upper low-pressure suction pipe 3 enters the low-pressure chamber 20, and cools the compressor controller 2 on the outside of the end face of the casing 1, and then cools the motor through the gap between the stator 5 and the rotor 6; the low-pressure refrigerant enters the main bearing side of the cylinder in the axial direction After the through hole 1011, 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 another part of the refrigerant continues to pass through the low pressure suction through hole 113 of the intermediate cover plate and the low pressure suction through hole of the intermediate partition plate. 123. The suction structure 131 of the cylinder on the auxiliary bearing side enters the cylinder 13 on the auxiliary bearing side to realize the suction process; the medium pressure refrigerant from the outlet of the economizer or flasher of the electric vehicle air conditioning system enters through the medium pressure suction pipe 18 on the casing 1 After the inlet 124 of the air supply pipe in the middle partition plate, the air supply through hole 125 in the middle partition plate enters the cylinder 13 on the auxiliary bearing side respectively, and the through hole 115 in the middle cover plate enters the cylinder 10 on the main bearing side to realize the air supply process; with the crankshaft 7 Rotation, the high-pressure refrigerant in the main bearing side cylinder 10 is discharged into the main bearing muffler 9 chamber through the main bearing exhaust hole 81, and at the same time is discharged into the intermediate exhaust chamber 19 through the intermediate cover plate exhaust hole 111, and the auxiliary bearing side cylinder 13 The high-pressure refrigerant inside is discharged into the chamber of the auxiliary bearing side muffler 15 through the auxiliary bearing exhaust hole 141, and at the same time is discharged into the intermediate exhaust cavity 19 through the middle partition plate exhaust hole 121; the high pressure refrigerant in the main bearing side muffler 9 chamber Through the main bearing high pressure exhaust through hole 82 , the main bearing side cylinder high pressure exhaust through hole 102 , the intermediate cover high pressure exhaust through hole 112 , the intermediate partition plate high pressure exhaust through hole 122 and the intermediate exhaust cavity 19 Refrigeration The refrigerant is mixed, and then enters the chamber of the auxiliary bearing side muffler 15 through the auxiliary bearing side cylinder high pressure exhaust through hole 132 and auxiliary bearing high pressure exhaust through hole 142, and finally the refrigerant in the auxiliary bearing side muffler 15 chamber flows into the high pressure chamber 21, The oil and gas are separated and discharged from the compressor through the high-pressure exhaust cyclone 4 .

14 is the oil supply path diagram of the utility model, the lubricating oil in the oil pool 22 is partly driven by the auxiliary bearing radial oil under the action of the refrigerant pressure difference in the main bearing side cylinder 10, the auxiliary bearing side cylinder 13 and the high pressure chamber 21 The hole 144 enters the unloading oil groove 145, and the other part enters the inner cavity of the middle spacer 12 through the radial oil hole 127 of the middle spacer; with the rotation of the crankshaft 7, a part of the lubricating oil in the unloading oil groove 145 lubricates the pair through the auxiliary bearing screw oil groove 146 The other part of the bearing 14 is migrated from the auxiliary bearing side screw oil groove 74 on the crankshaft 7 to the inner cavity of the intermediate spacer 12 and mixed to realize the lubrication between the auxiliary bearing side rolling piston 17 and the auxiliary bearing side eccentric part 72; the intermediate spacer 12. The lubricating oil in the inner cavity migrates from the main bearing side spiral oil groove 73 on the crankshaft 7 to the main bearing 8 side, realizing the lubrication between the main bearing side rolling piston 16 and the main bearing side eccentric part 71; finally, the main bearing side cylinder 10 Under the action of the pressure difference with the refrigerant in the low pressure chamber 20 , the lubricating oil migrates to the low pressure chamber 20 to lubricate the main bearing 8 , and the lubricating oil entering the low pressure chamber 20 realizes oil return with the suction.

Claims (9)

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 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 on 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 an intermediate cover plate (11), and a main bearing side silencer (9) is installed 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 (1001) in the shell (1), 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 annular end face (1001) and the outer wall face of the main bearing, 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 supplement pipe 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 supplement through hole (125) is processed in the axial direction of the middle clapboard (12) and penetrates through the middle clapboard air supplement 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).

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