Air-conditioning apparatus

An air-conditioning apparatus, comprising:

• a refrigeration cycle device constituted by a refrigerant circuit, the refrigerant circuit being connected by piping including a compressor that compresses a refrigerant, a refrigerant flow switching device that switches a circulation path of the refrigerant, a heat source side heat exchanger for exchanging heat with the refrigerant, a plurality of heat medium heat exchangers each heating or cooling a heat medium different than the refrigerant by heat exchange with the refrigerant, and a plurality of expansion devices each controlling a flow rate of the refrigerant flowing in a respective heat medium heat exchanger by controlling pressure of the refrigerant;
• a heat medium side device constituted by a heat medium circuit, the heat medium circuit being connected by piping including the heat medium heat exchangers, a heat medium delivery device for circulating the heat medium in the heat medium circuit, and a plurality of use side heat exchangers, each use side heat exchanger exchanging heat between the heat medium and air related to a conditioned space;
• a plurality of heat medium flow switching devices, a heat medium flow switching device disposed on an inflow side and a heat medium flow switching device disposed on an outflow side of each of the use side heat exchangers in the heat medium circuit, the heat medium flow switching devices disposed on the inflow side of the use side heat exchangers merging the heat medium from the plurality of heat medium heat exchangers and the heat medium flow switching devices disposed on the outflow side of the use side heat exchangers diverging the heat medium to the plurality of heat medium heat exchangers by controlling with a controller the degree to which ports of the heat medium flow switching devices are opened, which controls the amount of heat exchange of each of the heat medium heat exchangers, during a cooling only operation mode in which all of the heat medium heat exchangers performs cooling and during a heating only operation mode in which all of the heat medium heat exchangers performs heating, and
• temperature detection devices that detect the temperatures of the heat medium flowing out from the heat medium heat exchangers,
• wherein the controller calculates a correction value of the opening degrees of the heat medium flow switching devices on the basis of temperatures detected by the temperature detection devices and performs control in which the opening degrees of the heat medium flow switching devices are changed by the correction value of the opening degree.