HEAT PUMP APPARATUS

摘要

An apparatus includes a refrigerant circuit in which a compressor that compresses a refrigerant, an indoor-side heat exchanger serving as a radiator that exchanges heat between the refrigerant and a heating target, an expansion valve that decompresses the refrigerant by opening-degree adjustment, and an outdoor-side heat exchanger serving as an evaporator that exchanges heat between a heat-exchange target and the refrigerant are connected by pipes. The apparatus includes: an outdoor air temperature sensor that detects a temperature of outdoor air serving as the heat-exchange target; a discharge-side temperature sensor that detects a discharge temperature of the refrigerant discharged by the compressor; and a controller that, when the controller determines that a rotation speed of the compressor is a maximum and the temperature of the heat-exchange target is lower than a preset temperature, controls an opening degree of the expansion valve by using the discharge temperature.

主权项

1. A heat pump apparatus including a refrigerant circuit in which a compressor that compresses a refrigerant, a radiator that exchanges heat between the refrigerant and a heating target, a decompressor that decompresses the refrigerant by opening-degree adjustment, and an evaporator that exchanges heat between a heat-exchange target and the refrigerant are connected by pipes, the heat pump apparatus comprising:
a heat-exchange target temperature sensor that detects a temperature of the heat-exchange target; a discharge temperature sensor that detects a discharge temperature of the refrigerant discharged by the compressor; and a controller configured to select, based on the temperature of the heat-exchange target, from executing control based on a degree of superheat of the refrigerant and executing control based on the discharge temperature.