Heat exchange equipment

F - Mech Eng,Light,Heat,Weapons – 25 – B

Patent

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Details

F25B 47/02 (2006.01) F25B 13/00 (2006.01) F25B 29/00 (2006.01) F25B 30/02 (2006.01) F25B 41/00 (2006.01) F25B 41/06 (2006.01) F25B 5/02 (2006.01) F25B 41/04 (2006.01)

Patent

CA 2278415

Heat exchange equipment comprising a compressor which is connected to an indoor heat exchanger and also to two outdoor heat exchangers, and flow-direction changing means to change the direction of flow in the heat exchangers whereby each of the outdoor heat exchangers can be defrosted whilst the other continues to remove heat from its surroundings. Pressure lowering means are provided between the two outdoor heat exchangers. The flow-direction changing means are provided between the compressor and the heat exchangers and are controlled by control means to switch alternately between a first direction of flow of the heat exchange fluid, in which the latter passes from the indoor heat exchanger to one of the outdoor heat exchangers to defrost it, and thence to the other outdoor heat exchanger via the said pressure lowering means before it is returned to the compressor, so that the said other outdoor heat exchanger removes heat from its surroundings, and a second direction of flow of the heat exchange fluid, wherein the latter passes from the indoor heat exchanger to the said other outdoor heat exchanger to defrost it, and thence to the said one of the other outdoor heat exchangers via the said pressure lowering means, before it is returned to the compressor, so that the said one of the outdoor heat exchangers removes heat from its surroundings.

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