| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat exchanger capable of minimizing a defrosting time and further minimizing energy used in defrosting. SOLUTION: A refrigerant pipe 37 of an atmospheric air-side heat exchanger 15 is divided into a lower stage portion 41 disposed at a lower portion, an upper stage portion 42 and an intermediate stage portion 43 vertically disposed at an upper part of the lower stage portion 41. A refrigerant of which a pressure is properly reduced by a pressure reducer 13 flows into the lower stage portion 41 from a refrigerant inlet 47 of a lower portion of the atmospheric air-side heat exchanger 15 first, and then successively flows to a leeward row 45, a bent portion 46 and a windward row 44, here, the refrigerant radiates heat so that frost at a lower portion in the lower stage portion 41 is melted. The refrigerant radiating heat at the lower stage portion 41 and flowing out from a refrigerant outlet 48, is divided by a flow divider 60 to flow into the upper stage portion 42 and the intermediate stage portion 43 from refrigerant inlets 53, 58, and flows to refrigerant pipes. COPYRIGHT: (C)2008,JPO&INPIT
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