Patent ID: 11874039
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | IPC F  G

Claim 4:
5. A refrigeration cycle apparatus comprising:
a refrigeration cycle circuit including a compressor, a refrigerant flow switching device, an outdoor heat exchanger, an expansion device, and an indoor heat exchanger;
a bypass flow path connecting a first branch part provided between the outdoor heat exchanger and the expansion device in the refrigeration cycle circuit to a second branch part provided between the indoor heat exchanger and the refrigerant flow switching device in the refrigeration cycle circuit;
a first valve provided between the second branch part and the refrigerant flow switching device in the refrigeration cycle circuit;
a second valve provided at the bypass flow path;
a first temperature sensor configured to detect a temperature of an indoor space to which air passing through the indoor heat exchanger is supplied;
a second temperature sensor configured to detect a temperature of refrigerant on a liquid side of the indoor heat exchanger; and
a notification part configured to perform abnormality notification,, wherein
the expansion device is an electronic expansion valve,
the refrigeration cycle apparatus is able to operate in an operation state where the compressor operates, the indoor heat exchanger functions as an evaporator, and the first valve is open while the second valve is closed,
in the operation state, the notification part issues notification of an abnormality of the electronic expansion valve or the first valve when a temperature detected by the second temperature sensor is higher than an evaporation temperature of the refrigerant in the refrigeration cycle circuit,
the compressor is controlled such that a low pressure in the refrigeration cycle circuit approaches a target pressure, and
in the operation state, the notification part issues notification of an abnormality of the second valve when a value obtained by subtracting the target pressure from the low pressure is greater than a threshold and the compressor operates at a maximum operating frequency.