| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve such a problem that cracking is caused in a heat transfer tube or the brazing portion of the heat transfer tube in a heat exchanger of an outdoor unit of an air conditioner or a refrigerator because fatigue failure or the like, by an influence of installation environment and the leakage of a refrigerant, occurs, and that especially, an outdoor unit using a flammable refrigerant may cause a leaking refrigerant to be ignited. <P>SOLUTION: An outdoor heat exchanger forming a refrigerant circuit, which is constituted of a plurality of heat exchanger rows installed in an outdoor unit to circulate a flammable refrigerant, includes: a first heat exchanger row that is arranged adjacent to the wall surface of the outdoor unit provided with a suction port or a discharging port, and is positioned farthest from a blower among the plurality of heat exchanger rows of the outdoor heat exchanger; and a second heat exchanger row that is arranged on the side of the blower toward the first heat exchanger, and it is composed of a heat transfer tube wherein the ratio of the thickness to the outside diameter of a heat transfer tube of the first heat exchanger row is larger than that of the thickness to the outside diameter of a heat transfer tube of the second heat exchanger row. <P>COPYRIGHT: (C)2012,JPO&INPIT |
