Thermal management system for vehicle

A thermal management system for a vehicle, comprising:

• a first pump and a second pump that draw and discharge a heat medium;
• a compressor that draws and discharges a refrigerant;
• a heat-medium heating heat exchanger that exchanges heat between the refrigerant discharged from the compressor and the heat medium drawn into and discharged from the second pump, to heat the heat medium;
• an expansion valve that decompresses and expands the refrigerant flowing out of the heat-medium heating heat exchanger;
• a heat-medium cooling heat exchanger that exchanges heat between the refrigerant decompressed and expanded by the expansion valve and the heat medium drawn into and discharged from the first pump, to cool the heat medium;
• a heat-medium outside-air heat exchanger that exchanges heat between the heat medium and outside air;
• an air cooling heat exchanger that exchanges sensible heat between the heat medium cooled by the heat-medium cooling heat exchanger and ventilation air blowing into a vehicle interior, to cool the ventilation air;
• an air heating heat exchanger that exchanges sensible heat between the heat medium heated by the heat-medium heating heat exchanger and ventilation air blowing into the vehicle interior, to heat the ventilation air;
• an engine heat exchanger that transfers heat between an engine and the heat medium via an engine heat medium;
• a vehicle component that generates heat according to operation of the vehicle component and has a flow path through which the heat medium circulates, the vehicle component being adapted to transfer heat with the heat medium;
• a switching valve that switches between
• a state in which the heat medium circulates between the heat-medium cooling heat exchanger and the heat-medium outside-air heat exchanger, between the heat-medium cooling heat exchanger and the engine heat exchanger, and between the heat-medium cooling heat exchanger and the vehicle component, and
• a state in which the heat medium circulates through between the heat-medium heating heat exchanger and the heat-medium outside-air heat exchanger, between the heat-medium heating heat exchanger and the engine heat exchanger, and between the heat-medium heating heat exchanger and the vehicle component,
• the switching valve being configured to adjust a flow rate of the heat medium flowing to the heat-medium outside-air heat exchanger and a flow rate of the heat medium flowing to the engine heat exchanger;
• an operation switch that makes a cooling request for the air cooling heat exchanger to cool the ventilation air, and a heating request for the air heating heat exchanger to heat the ventilation air;
• a controller coupled to the operation switch and that is programmed to control an operation of at least one of the switching valve and the compressor based on presence or absence of the cooling request and presence or absence of the heating request from the operation switch;
• an engine heat medium temperature sensor coupled to the controller, the engine heat medium temperature sensor being configured to detect a temperature of the engine heat medium;
• an air cooling heat exchanger temperature sensor coupled to the controller, the air cooling heat exchanger temperature sensor being configured to detect a temperature of the heat medium flowing to the air cooling heat exchanger;
• and
• an air heating heat exchanger temperature sensor coupled to the controller, the air heating heat exchanger temperature sensor being configured to detect a temperature of the heat medium flowing to the air heating heat exchanger, wherein
• the controller is programmed to compare the temperature of the engine heat medium with a target temperature of the heat medium flowing to the air heating heat exchanger,
• the controller is programmed to compare the temperature of the heat medium flowing to the air heating heat exchanger with the target temperature of the heat medium flowing to the heating heat exchanger,
• when the cooling request is made from the operation switch, the controller controls the operation of at least one of the switching valve and the compressor, such that the temperature of the heat medium flowing to the air cooling heat exchanger is within a cooling temperature range,
• the controller is programmed to control the operation of at least one of the switching valve and the compressor based on at least one of the temperature of the engine heat medium, the temperature of the heat medium flowing to the air cooling heat exchanger, and the temperature of the heat medium flowing to the air heating heat exchanger,
• the controller is programmed to control the operation of the switching valve such that the heat medium circulates between the air heating heat exchanger and the engine heat exchanger when the heating request is made from the operation switch, and the temperature of the engine heat medium is higher than the target temperature of the heat medium flowing to the air heating heat exchanger, and
• the controller is programmed to control the operation of the switching valve to allow the heat medium to circulate between the air heating heat exchanger and the vehicle component when the heating request is made from the operation switch, the temperature of the engine heat medium is lower than the target temperature of the heat medium flowing to the air heating heat exchanger, and the temperature of the heat medium flowing to the air heating heat exchanger is higher than the target temperature.