REFRIGERATING CYCLE APPARATUS, AND AIR CONDITIONING APPARATUS

摘要

Provided is a refrigerating cycle apparatus, in which a compressor (21) for compressing a coolant containing a substance having a double bond, a condenser (22) for condensing the coolant by a heat exchange, an expansion means (23) for reducing the pressure of the coolant condensed, and an evaporator (24) for evaporating the pressure-reduced coolant by a heat exchange are piped and connected to constitute a coolant circuit for circulating the coolant.  The refrigerating cycle apparatus comprises a control means (53) for controlling the actions of the coolant circuit so that the pressure of the coolant in the coolant circuit becomes lower than the critical pressure of the substance having the double bond.