Refrigerant cycle apparatus

摘要

A refrigeration circuit is disclosed. It includes a compressor, a gas cooler, throttling means, an evaporator, an internal heat exchanger for exchanging heat between refrigerant discharged from the gas cooler and the evaporator, a temperature sensor for detecting the temperature of the refrigerant discharged from the internal heat exchanger via the evaporator and a control device for controlling a flow path resistance of the throttling means. The control device reduces the flow path resistance of the throttling means to raise the speed of rotation of the compressor when a temperature detected by the temperature sensor reaches or exceeds a defined temperature between +29°C and +35° and, increases the flow path resistance of the throttling means to lower the rotation number of the compressor when the temperature detected by the sensor is lower than the defined temperature based on an output of the temperature sensor.