Air conditioner

An air conditioner comprising:

• a heat-source-side unit comprising:
• a compressor;
• and
• a heat-source-side heat exchanger;
• use-side units each comprising a use-side heat exchanger;
• an intermediate unit that causes the use-side heat exchanger of each of the use-side units to
• individually function as an evaporator or a radiator of a refrigerant;
• and
• three or more connection pipes that connect the heat-source-side unit to the intermediate unit, wherein
• the intermediate unit comprises:
• an ejector that pressurizes the refrigerant;
• and
• a gas-liquid separator into which the refrigerant flowing out from the ejector flows,
• the refrigerant that has released heat in any of the use-side units that perform a heating operation is not pressurized by the ejector,
• the intermediate unit further comprises:
• a first pipe that allows the refrigerant to flow between the heat-source-side heat exchanger and the use-side heat exchanger of one of the use-side units;
• a first valve disposed in the first pipe;
• and
• a second pipe that:
• branches from a branch point of the first pipe between the heat-source-side heat exchanger and the first valve,
• allows the refrigerant to flow to a driving-flow inlet of the ejector, and
• the intermediate unit is configured such that the refrigerant, after having released the heat at one of the use-side units that perform the heating operation, flows through the first valve and then through the branch point.