To enhance efficiency of operation, in a refrigerating device capable of switching between a cooling operation and a heating operation.
An air conditioner 10 can be switched to cooling operation and warming operation and has a four-stage compressor 20, first to fourth heat exchangers 41 to 44, and an indoor heat exchanger 12a, and an expanding mechanism 70, and an inside heat exchanger 62. The fourth heat exchanger 44 functions as a heat radiator during cooling operation and functions as an evaporator during warming operation. The first to third heat exchanger 41 to 43 function as coolers during cooling operation and functions as evaporators during warming operation. The inside heat exchanger 62 exchanges heat between refrigerant supplied from the fourth heat exchanger 44 to the four-step compressor 20 and refrigerant supplied from the indoor heat exchanger 12 to the expanding mechanism 70 during warming operation. The refrigerant flows parallel through the first to fourth heat exchangers 41 to 44 during warming operation. The refrigerant supplied from the first to third heat exchangers 41 to 43 to the four-step compressor 20 merges with the refrigerant supplied from the fourth heat exchanger 44 to the four-step compressor 20 in a downstream from the exit from the inside heat exchanger during warming operation.
KOSHO KAZUHIRO
IWATA YASUHIRO
YO KUNITADA
| JP2009229051A | 2009-10-08 | |||
| JP2009222348A | 2009-10-01 | |||
| JP2006097972A | 2006-04-13 |