Sanden Corporation

Sanden Holdings Corporation

Syou Ishii

Junichiro Kasuya

Yasuaki Kanou

A unitary-side heat pump unit is configured so that a refrigerant circulates sequentially through a first compressor, a first heat exchanger, a cascade heat exchanger, a first expansion valve and an evaporator, and heat exchange with heat media of a heating unit is carried out in the first heat exchanger; a binary-side heat pump unit is configured so that a refrigerant circulates sequentially through a second compressor, a second heat exchanger, a second expansion valve and a cascade heat exchanger, and heat exchange with heat media of the heating unit is carried out in the second heat exchanger; the refrigerants of the unitary-side and binary-side heat pump units include carbon dioxide (CO) as a main component; and high pressure-side sections of the unitary-side and binary-side heat pump units are activated within substantially identical pressure ranges of supercritical pressure.

Growing community of inventors

Isesaki, Japan

Syou Ishii