To provide a refrigerator for serving independent cooling and heating operation, hot water supply and cold heat storage, cooling operation, heat exhaust and hot water supply, and heating operation and hot water supply with high efficiency.
A hot water supply heat exchanger and a pipe bypassing it are provided on the midway of a discharge pipe of a compressor via a first on-off valve. There are provided a primary refrigerant circuit using carbon dioxide as the refrigerant, a secondary refrigerant circuit via which a cold heat storage heat exchanger and a cold heat storage tank are connected to each other and a secondary refrigerant circuit in which the hot water supply heat exchanger and the cold heat storage tank are connected to each other.
KAWABE YOSHIKAZU
Tomoyasu Sakaguchi
Hiroki Naito