Air-conditioning apparatus

An air-conditioning apparatus comprising:

• a refrigerant circuit that connects a compressor, a heat source side heat exchanger, a plurality of expansion devices, refrigerant side passages of a plurality of heat exchangers related to heat medium, and a plurality of refrigerant flow switching devices that switch a circulation path, by a refrigerant pipe to circulate a heat source side refrigerant;
• and
• a heat medium circuit that connects a pump, a use side heat exchanger, and heat medium side passages of the heat exchangers related to heat medium by a heat medium pipe to circulate a heat medium,
• the heat exchangers related to heat medium exchanging heat between the heat source side refrigerant and the heat medium,
• wherein the refrigerant circuit is provided with a bypass pipe that bypasses the heat exchangers related to heat medium and returns the heat source side refrigerant to the compressor, and
• when using at least one of the heat exchangers related to heat medium as an evaporator, in a case where the air-conditioning apparatus has detected an evaporating temperature of the heat source side refrigerant passing through the heat exchanger related to heat medium that functions as the evaporator, the evaporating temperature of the heat source side refrigerant making a temperature of the heat medium passing through the heat exchanger related to heat medium become equal to or lower than a freezing temperature, the air-conditioning apparatus performs a heat medium anti-freezing operation that blocks entry of the heat source side refrigerant into the heat exchanger related to heat medium that functions as the evaporator, and that causes the heat source side refrigerant to flow via the bypass pipe.