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CN-116804472-B - Refrigerant compression pump, thermal management system and control method thereof

CN116804472BCN 116804472 BCN116804472 BCN 116804472BCN-116804472-B

Abstract

A refrigerant compression pump, a thermal management system and a control method thereof. The refrigerant compression pump comprises a shell, a motor, a compression part and a gas-liquid separator. The shell is provided with a refrigerant inlet and a refrigerant outlet, the refrigerant compression pump is provided with a separation cavity, a low-pressure cavity and a high-pressure cavity, the separation cavity, the low-pressure cavity and the high-pressure cavity are positioned in the shell, and the high-pressure cavity is communicated with the refrigerant outlet. The motor is connected with the compression part, the motor can drive the compression part to operate, the refrigerant compression pump is provided with a compression cavity, the compression part at least partially forms the cavity wall of the compression cavity, and the compression cavity can be communicated with the high-pressure cavity. The gas-liquid separator is at least partially positioned in the separation cavity, and the separation cavity is communicated with the refrigerant inlet. The refrigerant compression pump and the gas-liquid separator can share the shell, so that the cost is saved, and the risk of refrigerant leakage is reduced.

Inventors

  • TAN YONGXIANG
  • XU YUNGEN
  • ZHANG YUNFANG

Assignees

  • 浙江三花智能控制股份有限公司

Dates

Publication Date
20260505
Application Date
20230403

Claims (10)

  1. 1. A refrigerant compression pump, characterized in that the refrigerant compression pump comprises: A housing (50), the housing (50) having a refrigerant inlet (18) and a refrigerant outlet (19), the refrigerant compression pump having a separation chamber (12), a low pressure chamber (14) and a high pressure chamber (16), the separation chamber (12), the low pressure chamber (14) and the high pressure chamber (16) being located inside the housing (50), the high pressure chamber (16) being in communication with the refrigerant outlet (19); A motor (60), the motor (60) being located in a low pressure chamber (14), the low pressure chamber (14) being in communication with the separation chamber (12); A compression member (70), the motor (60) being connected to the compression member (70), the motor (60) being capable of driving the compression member (70) in operation, the refrigerant compression pump having a compression chamber (15), the compression member (70) at least partially forming a chamber wall of the compression chamber (15), the compression chamber (15) being capable of communicating with a high pressure chamber (16), and The gas-liquid separator (80), the gas-liquid separator (80) is at least partially positioned in the separation cavity (12), the separation cavity (12) is communicated with the refrigerant inlet (18), and the direction of the refrigerant inlet is inconsistent with that of the gas-liquid separator.
  2. 2. Refrigerant compression pump according to claim 1, characterized in that the gas-liquid separator (80) comprises a U-shaped tube (81), the inlet of the U-shaped tube (81) being in communication with the refrigerant inlet (18) of the refrigerant compression pump, the outlet of the U-shaped tube (81) being in communication with the low pressure chamber (14); The U-shaped pipe (81) comprises a first vertical pipe (811), a second vertical pipe (813) and a first transverse pipe (812), wherein the first transverse pipe (812) is connected between the bottom of the first vertical pipe (811) and the bottom of the second vertical pipe (813), and the first transverse pipe (812) is provided with an oil return hole (814).
  3. 3. Refrigerant compression pump according to claim 1, characterized in that it comprises an electric heater (20) and a controller (30), said refrigerant compression pump having an electric chamber (17) and a heating separation chamber (13), said controller (30) being located in the electric chamber (17), said motor (60) being electrically connected to the controller (30); The electric heater (20) and the gas-liquid separator (80) are both positioned in the heating separation cavity (13), the electric heater (20) is electrically connected with the controller (30), and the electric heater (20) is arranged at the top or the bottom of the separation cavity (12).
  4. 4. Refrigerant compression pump according to claim 1, characterized in that the refrigerant compression pump has a heating chamber (11), the heating chamber (11) being in communication with a refrigerant inlet (18) of the refrigerant compression pump, an outlet of the heating chamber (11) being in communication with a separation chamber (12), an outlet of the separation chamber (12) being in communication with a low pressure chamber (14), the refrigerant compression pump comprising a partition plate (54), the partition plate (54) being located between the heating chamber (11) and the separation chamber (12), the separation chamber (12) being located between the heating chamber (11) and the low pressure chamber (14); The refrigerant compression pump comprises an electric heater (20) and a controller (30), wherein the electric heater (20) is located in a heating cavity (11), the electric heater (20) is electrically connected with the controller (30), the motor (60) is electrically connected with the controller (30), and the electric heater (20) is used for heating the refrigerant in the heating cavity (11).
  5. 5. The refrigerant compression pump as claimed in any one of claims 1 to 4, characterized in that the motor (60) includes a stator (61), a rotor (64) and a rotating shaft (65), one end of the rotating shaft (65) is connected with the rotor (64), the other end of the rotating shaft (65) is connected with the compression member (70), the stator (61) includes a stator core (62) and an enamel wire (63), and the enamel wire (63) is electrically connected with the controller (30) through an adapter; The compression part comprises an orbiting scroll (71) and a fixed scroll (72), the compression cavity (15) is at least partially positioned between the orbiting scroll (71) and the fixed scroll (72), the orbiting scroll (71) comprises an orbiting scroll body (711) and orbiting scroll teeth (712), the fixed scroll (72) comprises a fixed scroll body (721) and fixed scroll teeth (722), and the orbiting scroll teeth (712) and the fixed scroll teeth (722) are meshed; the movable vortex disc (71) is connected with the rotating shaft (65), the fixed vortex disc (72) is provided with an exhaust hole (723), the refrigerant compression pump comprises an exhaust valve plate (74), and the exhaust valve plate (74) is matched with the exhaust hole (723).
  6. 6. A thermal management system, characterized in that the thermal management system comprises a refrigerant compression pump (10), an evaporator (91), a condenser (92) and a throttling device (93), wherein the outlet of the refrigerant compression pump (10) is communicated with the inlet of the condenser (92), the outlet of the condenser (92) is communicated with the inlet of the throttling device (93), the outlet of the throttling device (93) is communicated with the inlet of the evaporator (91), and the outlet of the evaporator (91) is communicated with the inlet of the refrigerant compression pump (10); wherein the refrigerant compression pump (10) comprises: A housing (50), the housing (50) having a refrigerant inlet (18) and a refrigerant outlet (19), the refrigerant compression pump (10) having a separation chamber (12), a low pressure chamber (14) and a high pressure chamber (16), the separation chamber (12), the low pressure chamber (14) and the high pressure chamber (16) being located inside the housing (50), the high pressure chamber (16) being in communication with the refrigerant outlet (19); A motor (60), the motor (60) being located in a low pressure chamber (14), the low pressure chamber (14) being in communication with the separation chamber (12); A compression member (70), the motor (60) being connected to the compression member (70), the motor (60) being capable of driving the compression member (70) in operation, the refrigerant compression pump (10) having a compression chamber (15), the compression member (70) at least partially forming a chamber wall of the compression chamber (15), the compression chamber (15) being capable of communicating with the high pressure chamber (16), and The gas-liquid separator (80), the gas-liquid separator (80) is at least partially positioned in the separation cavity (12), the separation cavity (12) is communicated with the refrigerant inlet (18), and the direction of the refrigerant inlet is inconsistent with that of the gas-liquid separator (80).
  7. 7. The thermal management system of claim 6, wherein the thermal management system comprises a dual-pass heat exchanger (94), the dual-pass heat exchanger (94) comprising a first pass (941) and a second pass (942), the outlet of the condenser (92) being in communication with the inlet of the first pass (941), the outlet of the first pass (941) being in communication with the inlet of the restriction (93), the outlet of the evaporator (91) being in communication with the inlet of the second pass (942), the outlet of the second pass (942) being in communication with the inlet of the refrigerant compression pump (10).
  8. 8. The thermal management system according to claim 6, wherein the throttle device (93) comprises a first electronic expansion valve (931) and a second electronic expansion valve (932), the second electronic expansion valve (932) being arranged in parallel with the first electronic expansion valve (931), the first electronic expansion valve (931) being connected between an outlet of the condenser (92) and an inlet of the evaporator (91), the second electronic expansion valve (932) being connected between an outlet of the condenser (92) and an inlet of the refrigerant compression pump (10).
  9. 9. A control method of the thermal management system according to any one of claims 6 to 8, comprising: The heat management system operates in a heating mode, the refrigerant compression pump (10) compresses refrigerant, and the refrigerant sequentially flows through the condenser (92), the throttling device (93) and the evaporator (91) from the refrigerant compression pump (10) and then returns to the refrigerant compression pump (10); The refrigerant returned to the refrigerant compression pump (10) is separated into a gaseous refrigerant and a liquid refrigerant by the gas-liquid separator (80), and the gaseous refrigerant is compressed again by the compression part to form a circulation loop.
  10. 10. The control method according to claim 9, wherein the refrigerant returned to the refrigerant compression pump is separated into a gaseous refrigerant and a liquid refrigerant by a gas-liquid separator (80), and the gaseous refrigerant is recompressed by the compression section to form a circulation circuit, comprising: the gaseous refrigerant enters the low-pressure cavity (14) and the compression cavity (15) after being heated by the electric heater (20), and is compressed again by the compression cavity (15).

Description

Refrigerant compression pump, thermal management system and control method thereof Technical Field The application relates to the technical field of thermal management, in particular to an integrated structure of a compressor and a gas-liquid separator. Background The heat management system comprises a compressor, a condenser, a throttling device, an evaporator and a gas-liquid separator, and because the compressor and the gas-liquid separator are independently arranged, a pipeline is required to be connected with the compressor and the gas-liquid separator, so that the cost is increased, and the leakage risk of the refrigerant at the pipeline connection part is increased. Disclosure of Invention In one aspect, the present application provides a refrigerant compression pump comprising: The shell is provided with a refrigerant inlet and a refrigerant outlet, the refrigerant compression pump is provided with a separation cavity, a low-pressure cavity and a high-pressure cavity, the separation cavity, the low-pressure cavity and the high-pressure cavity are positioned in the shell, and the high-pressure cavity is communicated with the refrigerant outlet; The motor is positioned in the low-pressure cavity, and the low-pressure cavity is communicated with the separation cavity; A compression part connected with the motor, the motor can drive the compression part to operate, the refrigerant compression pump is provided with a compression cavity, the compression part at least partially forms the cavity wall of the compression cavity, the compression cavity can be communicated with the high-pressure cavity, and The gas-liquid separator is at least partially positioned in the separation cavity, and the separation cavity is communicated with the refrigerant inlet. The refrigerant compression pump comprises the motor, the compression part and the gas-liquid separator, and the refrigerant compression pump and the gas-liquid separator can share the shell through the gas-liquid separator arranged in the refrigerant compression pump, so that the cost is saved, and the risk of refrigerant leakage is reduced. In a second aspect, the present application provides a thermal management system, including a refrigerant compression pump, an evaporator, a condenser, and a throttling device, wherein an outlet of the refrigerant compression pump is communicated with an inlet of the condenser, an outlet of the condenser is communicated with an inlet of the throttling device, an outlet of the throttling device is communicated with an inlet of the evaporator, and an outlet of the evaporator is communicated with an inlet of the refrigerant compression pump; wherein, the refrigerant compression pump includes: The shell is provided with a refrigerant inlet and a refrigerant outlet, the refrigerant compression pump is provided with a separation cavity, a low-pressure cavity and a high-pressure cavity, the separation cavity, the low-pressure cavity and the high-pressure cavity are positioned in the shell, and the high-pressure cavity is communicated with the refrigerant outlet; The motor is positioned in the low-pressure cavity, and the low-pressure cavity is communicated with the separation cavity; A compression part connected with the motor, the motor can drive the compression part to operate, the refrigerant compression pump is provided with a compression cavity, the compression part at least partially forms the cavity wall of the compression cavity, the compression cavity can be communicated with the high-pressure cavity, and The gas-liquid separator is at least partially positioned in the separation cavity, and the separation cavity is communicated with the refrigerant inlet. The refrigerant compression pump of the thermal management system comprises the motor, the compression component and the gas-liquid separator, and the refrigerant compression pump and the gas-liquid separator can share the shell through the gas-liquid separator arranged in the refrigerant compression pump, so that the cost is saved, and the risk of refrigerant leakage is reduced. In a third aspect, the present application provides a control method of a thermal management system, the thermal management system including a refrigerant compressor pump, a condenser, a throttling device, and an evaporator, the refrigerant compressor pump including a compression member and a gas-liquid separator, the control method of the thermal management system including: The heat management system operates in a heating mode, the refrigerant compression pump compresses refrigerant, and the refrigerant sequentially flows through the condenser, the throttling device and the evaporator from the refrigerant compression pump and then returns to the refrigerant compression pump; The refrigerant returned to the refrigerant compression pump is separated into a gaseous refrigerant and a liquid refrigerant through the gas-liquid separator, and the gaseous refrigerant is compressed again through