Thermal management device

A thermal management device comprising:

• two or more heat dissipation devices that dissipate heat into a heat medium;
• a heat medium-air heat exchanger that exchanges heat between air and the heat medium having heat dissipated in the two or more heat dissipation devices;
• a flow-rate adjustment device that adjusts a flow rate of the heat medium flowing through a first heat dissipation device of the two or more heat dissipation devices;
• a compressor that draws and discharges a refrigerant;
• a decompression device that decompresses and expands the refrigerant;
• a low-pressure side heat exchanger that exchanges heat with the refrigerant decompressed and expanded by the decompression device;
• a cold storage device thermally connected to the low-pressure side heat exchanger, the cold storage device being adapted to store cold heat supplied from the refrigerant decompressed and expanded by the decompression device;
• a blower that blows air into the vehicle interior;
• and
• a control unit configured to estimate an increase or a decrease in amount of heat dissipation into the heat medium at the first heat dissipation device, wherein
• a second heat dissipation device of the two or more heat dissipation devices is a high-pressure side heat exchanger that exchanges heat with the refrigerant discharged from the compressor and then flows out the refrigerant toward the decompression device,
• the low-pressure side heat exchanger is adapted to directly or indirectly exchange heat between the refrigerant decompressed and expanded by the decompression device and air to be blown into a vehicle interior,
• the low-pressure side heat exchanger and the cold storage device are disposed in a first heat medium circuit, the two or more heat dissipation devices are disposed in a second heat medium circuit that is different from the first heat medium circuit,
• the control unit controls the flow-rate adjustment device to increase the flow rate of the heat medium flowing through the first heat dissipation device and reduces a refrigerant discharge capacity of the compressor, if the control unit estimates the increase in the amount of heat dissipation into the heat medium at the first heat dissipation device,
• the cold storage device is adapted to cool the air to be blown into the vehicle interior by using the cold heat stored in the cold storage device, if the control unit estimates the increase in the amount of heat dissipation into the heat medium at the first heat dissipation device, and
• the control unit reduces a blowing capacity of the blower when cooling the air to be blown into the vehicle interior by using the cold heat stored in the cold storage device.