Air conditioning apparatus and outdoor unit

An outdoor unit comprising:

• a compressor that compresses a refrigerant;
• a pressure-reducing valve that reduces a pressure of the refrigerant;
• a heat source-side heat exchanger that makes heat exchange to be conducted between the refrigerant and a heat source-side heat medium;
• first and second refrigerant-to-refrigerant heat exchangers that cool the refrigerant;
• a flow path switching valve that switches a refrigerant circuit in which the refrigerant circulates;
• a refrigerant piping that connects the compressor, the pressure-reducing valve, the heat source-side heat exchanger, the first and second refrigerant-to-refrigerant heat exchangers, and the flow path switching valve;
• a first piping connection portion connected to one end portion of a load-side heat exchanger flow path via a piping, the load-side heat exchanger flow path being formed in a load-side heat exchanger that makes heat exchange to be conducted between the refrigerant and a load-side heat medium;
• and
• a second piping connection portion connected to the other end portion of the load-side heat exchanger flow path via a piping,
• wherein
• a high-temperature-side flow path and a low-temperature-side flow path are formed in the first and second refrigerant-to-refrigerant heat exchangers,
• the high-temperature-side flow path includes a first high-temperature-side flow path and a second high-temperature-side flow path,
• the low-temperature-side flow path includes a first low-temperature-side flow path and a second low-temperature-side flow path,
• heat exchange is conducted between the refrigerant passing through the first high-temperature-side flow path and the refrigerant passing through the first low-temperature-side flow path, and heat exchange is conducted between the refrigerant passing through the second high-temperature-side flow path and the refrigerant passing through the second low-temperature-side flow path,
• wherein the flow path switching valve switches between a first flow direction and a second flow direction,
• the first flow direction that flows the refrigerant in order of the compressor, the heat source-side heat exchanger, the first high-temperature-side flow path, the pressure-reducing valve, and the first piping connection portion, the second piping connection portion, and the first low-temperature-side flow path, and
• the second flow direction that flows the refrigerant in order of the second piping connection portion, the first piping connection portion, the second high-temperature-side flow path, the pressure-reducing valve, the heat source-side heat exchanger, the second low-temperature-side flow path, and the compressor,
• wherein in the first flow direction, an inlet port of the first high-temperature-side flow path is formed at a place located downstream of an outlet port of the first high-temperature-side flow path with respect to the refrigerant flowing through the first low-temperature-side flow path, and
• in the second flow direction, an inlet port of the second high-temperature-side flow path is formed at a place located downstream of an outlet port of the second high-temperature-side flow path with respect to the refrigerant flowing through the second low-temperature-side flow path.