TECHNICAL FIELD

The present invention relates to a refrigeration cycle apparatus including refrigerant circuits.

BACKGROUND ART

A refrigeration cycle apparatus that has been proposed includes a first refrigerant circuit including a compressor, a condenser, an expansion device, and an evaporator and a second refrigerant circuit including a subcooling heat exchanger (see, for example, Patent Literature 1). In the refrigeration cycle apparatus described in Patent Literature 1, the subcooling heat exchanger of the second refrigerant circuit causes subcooling of refrigerant that is condensed by the condenser of the first refrigerant circuit.

CITATION LIST

Patent Literature

Patent Literature 1: Japanese Unexamined Patent Application Publication No. 2007-232245

SUMMARY OF INVENTION

Technical Problem

A refrigeration cycle apparatus of the related art has a problem in that a contribution of the second refrigerant circuit to the first refrigerant circuit is limited to subcooling, and it is unlikely that the performance further improves.

The present invention has been accomplished to solve the above problem of the related art, and an object of the present invention is to provide a refrigeration cycle apparatus that enables a coefficient of performance (COP) to be improved.

Solution to Problem

A refrigeration cycle apparatus according to an embodiment of the present invention includes a first refrigerant circuit through which first refrigerant flows, the first refrigerant circuit including a first compressor, a first heat exchanger, a first refrigerant flow path of a second heat exchanger, a first expansion device, a third heat exchanger, and a second refrigerant flow path of a fourth heat exchanger; and a second refrigerant circuit through which second refrigerant flows, the second refrigerant circuit including a second compressor, a fifth heat exchanger, a second expansion device, a third refrigerant flow path of the second heat exchanger, and a fourth refrigerant flow path of the fourth heat exchanger, the first refrigerant flowing through the first refrigerant circuit in order of the first compressor, the first heat exchanger, the first refrigerant flow path, the first expansion device, the third heat exchanger, and the second refrigerant flow path, the second refrigerant flowing through the second refrigerant circuit in order of the second compressor, the fifth heat exchanger, the second expansion device, the third refrigerant flow path, and the fourth refrigerant flow path.

Advantageous Effects of Invention

The refrigeration cycle apparatus according to the embodiment of the present invention has the above structure and enables the COP to be improved.

