| 摘要 |
PROBLEM TO BE SOLVED: To improve heating capacity by continuing heating of a room even during defrosting of an outdoor heat exchanger, in a refrigerating system to simultaneously effect air conditioning and refrigerating. SOLUTION: An indoor unit, a cold storage unit, and a refrigerating unit are connected to an outdoor unit to constitute a refrigerating system. Differently from a first four-passage switching valve (3A) to switch cooling and heating of the indoor unit, a second four-passage switching valve (3B) is situated at a refrigerant circuit (1E). By operating the second four-passage switching valve (3B) during heating operation that an indoor heat exchanger (41) forms a condenser and a cold storage heat exchanger (45) and a refrigerating heat exchanger (51) form an evaporator, an outdoor heat exchanger (4) is switched from an evaporator to the condenser. As heating of indoor air in the indoor heat exchanger (41) is continued, defrost of the outdoor heat exchanger (4) is effected.
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