Refrigeration cycle apparatus

摘要

A refrigeration cycle apparatus includes a controller configured to control opening and closing of a solenoid valve and that of a solenoid valve depending on any of a time when a compressor is activated, a time when the compressor is in normal operation, a time when a temperature of a motor of the compressor rises in the normal operation, and a time when the compressor stopped due to low-pressure cutoff is activated.

主权项

1. A refrigeration cycle apparatus comprising:
a heat source side circuit in which at least one compressor configured to compress a refrigerant and discharge the refrigerant, a condenser configured to exchange heat between the refrigerant discharged from the compressor and a heat medium, and a subcooling coil configured to subcool the refrigerant flowing from the condenser are connected by pipes; an injection circuit that branches off at a downstream side of the subcooling coil in the heat source circuit and connects through the subcooling coil to an intermediate pressure portion of the compressor; a bypass that branches off at a downstream side of the subcooling coil in the injection circuit and connects to a suction side of the compressor; a first solenoid valve disposed closer to the compressor than a connection point between the injection circuit and the bypass; a second solenoid valve disposed in the bypass; and a controller configured to
control a frequency of the compressor, opening and closing of the first solenoid valve, and opening and closing of the second solenoid valve,wherein the controller controls the opening and closing of the first and second solenoid valves depending on any of a time when the compressor is activated, a time when the compressor is in normal operation, a time when a temperature of a motor of the compressor rises in the normal operation, or a time when the compressor is reactivated so as to return from a stopped state due to low-pressure cutoff,the controller is configured to (i) control both of the first solenoid valve and the second solenoid valve to remain in a closed position during a first time, the first time being when the compressor is in the stopped state due to low-pressure cutoff; and (ii) control the first solenoid valve to be opened from the closed position and the second solenoid valve to remain in the closed position during a second time, the second time being when the compressor is reactivated so as to return from the stopped state due to low-pressure cutoff.