Air conditioner

An air conditioner comprising:

• a compressor that compresses a refrigerant;
• an indoor heat exchanger that exchanges heat between indoor air and a refrigerant;
• an outdoor heat exchanger that exchanges heat between outside air and a refrigerant;
• a heat storage heat exchanger that exchanges heat between a heat storage material and a refrigerant;
• a plurality of switching valves that switch a circulation path of a refrigerant circuit in which a refrigerant circulates between a heat storage heating operation in which the indoor heat exchanger and the heat storage heat exchanger function as a condenser and the outdoor heat exchanger function as an evaporator and a defrosting heating operation in which the indoor heat exchanger and the outdoor heat exchanger function as a condenser and the heat storage heat exchanger function as an evaporator;
• a first flow path that connects the indoor heat exchanger and the outdoor heat exchanger;
• a branch portion that is provided in the first flow path;
• a second flow path that connects the heat storage heat exchanger and the branch portion;
• a first expansion valve that adjusts a flow rate of a refrigerant flowing through a portion of the first flow path between the indoor heat exchanger and the branch portion;
• and
• a second expansion valve that is provided between the indoor heat exchanger and the first expansion valve of the first flow path and decompresses a refrigerant passing therethrough.