Abstract: An air conditioning device for a vehicle has a compressor, an evaporator, a driving condition detector, a temperature detector, and a controller. The driving condition detector detects a driving condition of the vehicle. The evaporator has a cold storage portion storing the heat from the refrigerant and having phase-change energy in at least two different temperature ranges. The controller (i) maintains the compressor being stopped while a temperature detected by the temperature detector is lower than or equal to the first temperature when the vehicle is in a coasting operation and (ii) maintains the compressor being stopped while the temperature is lower than or equal to the second temperature when the vehicle is stopped. The coasting operation is a driving condition in which a vehicle speed is lower than or equal to a specified speed and an acceleration device of the vehicle is not operated.

Abstract: An air conditioning device for a vehicle has a compressor, an evaporator, a driving condition detector, a temperature detector, and a controller. The driving condition detector detects a driving condition of the vehicle. The evaporator has a cold storage portion storing the heat from the refrigerant and having phase-change energy in at least two different temperature ranges. The controller (i) maintains the compressor being stopped while a temperature detected by the temperature detector is lower than or equal to the first temperature when the vehicle is in a coasting operation and (ii) maintains the compressor being stopped while the temperature is lower than or equal to the second temperature when the vehicle is stopped. The coasting operation is a driving condition in which a vehicle speed is lower than or equal to a specified speed and an acceleration device of the vehicle is not operated.

Abstract: A cold storage heat exchanger that exchanges heat with air flowing therearound includes: a refrigerant passage through which refrigerant flows; and a cold storage body housing a cold storage medium that exchanges heat with refrigerant flowing through the refrigerant passage and stores an amount of heat from the refrigerant. The cold storage medium includes: a low carbon number paraffin comprising at least one of C12 paraffin and C13 paraffin; and a high carbon number paraffin comprising at least one of C15 paraffin and C16 paraffin. A concentration of the high carbon number paraffin in the cold storage medium is higher than 60 percent by weight and lower than 100 percent by weight. A concentration of the low carbon number paraffin in the cold storage medium is higher than 0 percent by weight and lower than 40 percent by weight.

Abstract: A cold storage heat exchanger for exchanging heat with air flowing therearound includes a refrigerant passage in which refrigerant flows, and a cold storage container that accommodates therein cold storage materials which exchanges heat with the refrigerant flowing through the refrigerant passage and retains the amount of heat from the refrigerant. The cold storage materials having different melting points are accommodated in the cold storage container.