Heat pump type heat management system of electric automobile
A management system and technology for electric vehicles, applied in the field of electric vehicle heat pump type thermal management systems, can solve the problems of increased high-voltage load power of the whole vehicle, overheating of the air outlet from the air conditioner, and no heat dissipation components, so as to avoid overheating of the outlet air and high heating efficiency. , the effect of low operating temperature
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[0055] Example 1
[0056] Under cooling conditions, the system can be forced to cool with refrigerant, or cool with low-temperature radiator. For details, please refer to the following cases a and b.
[0057] a. Under the cooling condition, when the ambient temperature is ≥5°C, the refrigerant realizes the cooling of the passenger compartment and the cooling of the battery at the same time. At this time, the state of the heat pump heat management system of the electric vehicle of the present invention is as follows figure 2 shown.
[0058]The refrigerant flow path is as follows: the compressor 1 on the refrigerant circuit 100 works to drive the refrigerant to flow to the water-cooled condenser 2, the first electronic expansion valve 3 and the third electronic expansion valve 8 are opened, the second electronic expansion valve 6 is closed, and the refrigeration is performed. The refrigerant is divided into two parallel paths and flows through the outdoor evaporator 4 and the ...
Example Embodiment
[0066] Example 2
[0067] Under heating conditions, the system can use water heater for forced heating, heat pump heating, or directly heat the power battery through motor waste heat. For details, please refer to the following cases a, b, and c.
[0068] a. Under the heating condition, when the ambient temperature is less than or equal to -18°C, the water heater can be used to realize the heating of the passenger compartment and the heating of the battery at the same time. Figure 4 shown.
[0069] The refrigerant circuit 100 does not operate.
[0070] The warm air cooling liquid circuit 200 and the battery cooling liquid circuit 300 are connected to realize a circulation circuit. Coolant flow path:
[0071] The first coolant stop valve 14 is opened, the second coolant stop valve 16 is closed, the third coolant stop valve 18 is opened, the fourth coolant stop valve 12 is closed, the fifth coolant stop valve 22 is closed, and the motor water pump 20 does not work . The war...
Example Embodiment
[0082] Example 3
[0083] Under the conditions of high humidity in spring and autumn, the heat pump air conditioning system needs to dehumidify and reheat the humid air inside or outside the car to ensure that the air in the passenger compartment is dry and hot air, so as to avoid the appearance of the air in the car. Window fogging affects driving safety. The thermal management system can be adjusted according to the ambient temperature, see case a, case b, case c below for details.
[0084] a. Under the condition of defogging, when 3°C Figure 7 shown.
[0085] The refrigerant flow path is as follows: the compressor 1 operates, compresses and warms the refrigerant, drives the refrigerant to flow to the water-cooled condenser 2, the high-temperature refrigerant dissipates heat in the water-cooled condenser 2, and dissipates the heat to the warm air cooling liquid circuit 200. The refrigerant is condensed and cooled, flows into the first electronic expansion valve 3 for thro...
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