To suppress frost formation on an evaporator and to enhance operating efficiency at low costs. At the time of startup of a vehicle refrigeration unit, a dehumidifying operation mode (S104) is started if the discharge temperature of the evaporator is equal ...

The method involves computing water load capacity of a cooling element based on air temperature, air humidity, air mass flow before and after the element or estimating the load capacity based on air temperature gradation and under consideration of actual a...

In a vehicle air conditioner, a refrigerant cycle system is constructed to switch a cooling refrigerant cycle (C) where an interior heat exchanger (18) is used as an evaporator, and a hot gas heater cycle (H) where the interior heat exchanger is used as a ...