A thermal management system with tandem control of passenger compartment heating for hybrid electric vehicles

Abstract

The present invention discloses a hybrid vehicle thermal management system with passenger compartment heating series control, wherein the electronic water pump in the engine is connected to the WPTC through a water pipe, the WPTC is connected to the liquid inlet of the electronic regulating water valve through a water pipe, the two liquid outlets of the electronic regulating water valve are connected to the heater core and the battery heat exchanger, the high-temperature radiator is connected to the electronic water pump in the engine through a water pipe, the battery heat exchanger and the power battery are both connected to the electronic water pump through a water pipe, and the condenser, evaporator and electric compressor are connected through an air conditioning pipe. In the passenger compartment heating circuit, the present invention cancels the conventional independent electronic water pump and uses an electronic water pump built into the engine instead. Under heating conditions, the water circuit uses a single driving source, which simplifies the layout of the hybrid vehicle heating circuit. In the vehicle function calibration work, only the relevant engine startup temperature rise rate value and the shutdown water temperature value need to be calibrated, the calibration workload is simplified, and the purpose of reducing the weight of the whole vehicle is achieved at the same time.

Description

Technical field:

[0001] The invention relates to a heat management system with passenger compartment heating series control for a hybrid vehicle. Background technology:

[0002] When hybrid vehicles adjust the temperature (heat) in the car under low temperature conditions, they usually use the heat from the engine coolant (engine working mode) or WPTC (electric mode) to provide heat. In the engine working mode, the water circuit is driven by the built-in water pump of the engine; in the electric mode, the water circuit is driven by the electronic water pump connected in series in the circuit. Based on the above principle, conventional hybrid vehicles need to consider adding an electronic water pump to the passenger compartment heating circuit, which increases the weight of the vehicle body. At the same time, it is necessary to reserve a position for the electronic water pump and related connecting coolant pipes in the limited space in the front cabin of the vehicle, making the heating circuit water circuit complicated. Summary of the invention:

[0003] The present invention aims to solve the above problems in the prior art and provides a hybrid electric vehicle thermal management system with passenger compartment heating series control.

[0004] The technical solutions adopted in the present invention are:

[0005] A hybrid electric vehicle thermal management system with passenger compartment heating series control comprises a WPTC, an electronic regulating water valve, a heater core, a battery heat exchanger, a high-temperature radiator, a condenser, an evaporator, an electronic water pump, an electric compressor, a power battery, a water pipe, an air conditioning pipe and an engine with a built-in electronic water pump, wherein the electronic water pump in the engine is connected to the WPTC through a water pipe, the WPTC is connected to a liquid inlet of the electronic regulating water valve through a water pipe, two liquid outlets of the electronic regulating water valve are connected to the heater core and the battery heat exchanger, the high-temperature radiator is connected to the electronic water pump in the engine through a water pipe, the battery heat exchanger and the power battery are both connected to the electronic water pump through a water pipe, and the condenser, the evaporator and the electric compressor are connected through an air conditioning pipe.

[0006] Furthermore, the heating power of the WPTC is 7KW.

[0007] Furthermore, a cooling fan is provided on one side of the high-temperature radiator.

[0008] Furthermore, the high-temperature radiator and the condenser are both arranged along the axial direction of the cooling fan.

[0009] Furthermore, a blower is provided on one side of the heater core.

[0010] Furthermore, the refrigerant model running inside the air conditioning pipe is R134A.

[0011] Furthermore, the operating coolant in the water pipe is a mixture of ethylene glycol and water, with the ratio of ethylene glycol to water being 50% each.

[0012] The present invention has the following beneficial effects:

[0013] The present invention eliminates the conventional independent electronic water pump in the passenger compartment heating circuit and uses the engine built-in electronic water pump instead. Under heating conditions, the water circuit uses a single driving source, which simplifies the layout of the hybrid vehicle heating circuit. In the vehicle function calibration work, only the relevant engine startup temperature rise rate value and shutdown water temperature value need to be calibrated, and the calibration workload is simplified. At the same time, the purpose of reducing the weight of the whole vehicle is achieved. Description of the drawings:

[0014] Figure 1 Schematic diagram of the thermal management system of the present invention.

[0015] In the figure: 1. Engine; 2. WPTC; 3. Electronic regulating water valve; 4. Heater core; 5. Battery heat exchanger; 6. Blower; 7. Cooling fan; 8. High-temperature radiator; 9. Condenser; 10. Evaporator; 11. Electronic water pump; 12. Electric compressor; 13. Power battery. Specific implementation method:

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] like Figure 1 As shown, a thermal management system of a hybrid vehicle with passenger compartment heating series control of the present invention comprises WPTC2, an electronic regulating water valve 3, a heater core 4, a battery heat exchanger 5, a high-temperature radiator 8, a condenser 9, an evaporator 10, an electronic water pump 11, an electric compressor 12, a power battery 13, a water pipe, an air conditioning pipe and an engine 1 with a built-in electronic water pump, wherein the electronic water pump in the engine 1 is connected to the WPTC through a water pipe, the WPTC is connected to the liquid inlet of the electronic regulating water valve 3 through a water pipe, the two liquid outlets of the electronic regulating water valve 3 are connected to the heater core 4 and the battery heat exchanger 5, the high-temperature radiator 8 is connected to the electronic water pump in the engine 1 through a water pipe, the battery heat exchanger 5 and the power battery 13 are both connected to the electronic water pump through a water pipe, and the condenser 9, the evaporator 10 and the electric compressor 12 are connected through the air conditioning pipe.

[0018] The passenger compartment heating circulating water passes through the engine 1, WPTC, and electronic regulating water valve 3, and exchanges heat with the air 5 in the heater core 4 to achieve the purpose of heating. In engine mode, the waste heat of the engine 1 is used as the heat source; in electric mode, the WPTC2 is used as the heat source. In electric mode, the passenger compartment hot water is driven by the built-in electronic water pump of the engine 1 to circulate.

[0019] The heating power of WPTC is 7KW. When the heating water temperature rise rate in electric mode is too low in winter and fails to reach the preset value, the engine is started to achieve rapid heating. When the water temperature reaches the preset value, the engine is turned off.

[0020] A cooling fan 7 is provided on one side of the high temperature radiator 8, and a blower 6 is provided on one side of the heater core 4. The high temperature radiator 8 and the condenser 9 are arranged along the axis direction of the cooling fan 7, and the heater core 4 is arranged along the axis direction of the blower 6, so as to maximize the heat dissipation effect.

[0021] The internal operating refrigerant model of the air conditioning pipe in the present invention is R134A, and the operating coolant in the water pipe is a mixture of ethylene glycol and water, with the ratio of ethylene glycol to water being 50% each.

[0022] The present invention eliminates the conventional independent electronic water pump in the passenger compartment heating circuit and uses the engine built-in electronic water pump instead. Under heating conditions, the water circuit uses a single driving source, which simplifies the layout of the hybrid vehicle heating circuit. In the vehicle function calibration work, only the relevant engine startup temperature rise rate value and shutdown water temperature value need to be calibrated, and the calibration workload is simplified. At the same time, the purpose of reducing the weight of the whole vehicle is achieved.

[0023] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A thermal management system for a hybrid vehicle with a series control of passenger compartment heating, characterized in that: The invention comprises a WPTC (2), an electronic regulating water valve (3), a heater core (4), a battery heat exchanger (5), a high-temperature radiator (8), a condenser (9), an evaporator (10), an electronic water pump (11), an electric compressor (12), a power battery (13), a water pipe, an air conditioning pipe and an engine (1) with a built-in electronic water pump, wherein the electronic water pump in the engine (1) is connected to the WPTC (2) through a water pipe, the WPTC (2) is connected to the liquid inlet of the electronic regulating water valve (3) through a water pipe, the two liquid outlets of the electronic regulating water valve (3) are connected to the heater core (4) and the battery heat exchanger (5), the high-temperature radiator (8) is connected to the electronic water pump in the engine (1) through a water pipe, the battery heat exchanger (5) is connected to the power battery (13), and the electric compressor (12) is connected to the power battery (13). The batteries (13) are connected to the electronic water pump (11) through water pipes, and the condenser (9), the evaporator (10) and the electric compressor (12) are connected through air conditioning pipes; the passenger compartment heating circulating water passes through the engine (1), WPTC, and the electronic regulating water valve (3), and exchanges heat with the air in the heater core (4) to achieve the purpose of heating. In the engine mode, the residual heat of the engine (1) is used as the heat source; in the electric mode, the WPTC (2) is used as the heat source; in the electric mode, the passenger compartment hot water is driven to circulate by the built-in electronic water pump of the engine (1); in the heating condition, the water circuit uses a single driving source, which simplifies the layout of the hybrid vehicle heating circuit; in the vehicle function calibration work, only the engine start temperature rise rate value and the shutdown water temperature value are calibrated.

2. The thermal management system for a hybrid vehicle with passenger compartment heating cascade control as claimed in claim 1, characterized in that: The heating power of the WPTC (2) is 7KW.

3. The thermal management system for a hybrid vehicle with passenger compartment heating cascade control as claimed in claim 1, characterized in that: A cooling fan (7) is provided on one side of the high-temperature radiator (8).

4. The thermal management system for a hybrid vehicle with passenger compartment heating cascade control as claimed in claim 3, characterized in that: The high-temperature radiator (8) and the condenser (9) are both arranged along the axial direction of the cooling fan (7).

5. The thermal management system for a hybrid vehicle with passenger compartment heating cascade control as claimed in claim 1, characterized in that: A blower (6) is provided on one side of the warm air core (4).

6. The thermal management system for a hybrid vehicle with passenger compartment heating cascade control as claimed in claim 1, characterized in that: The refrigerant model inside the air conditioning pipe is R134A.

7. The thermal management system for a hybrid vehicle with passenger compartment heating cascade control as claimed in claim 1, characterized in that: The operating coolant in the water pipe is a mixture of ethylene glycol and water, with the ratio of ethylene glycol to water being 50% each.

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