| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a dual refrigerating cycle device capable of obtaining a large amount of high temperature hot water, being manufactured at low cost, and contriving the reduction of a running cost. <P>SOLUTION: The dual refrigerating cycle device is provided with a high temperature side refrigerating circuit R1 for communicating a high temperature side compressor 1, a water heat exchanger 2, a high temperature side expansion device 4 and a cascade heat exchanger 5, and first and second low temperature side refrigerating circuits R2a, R2b for communicating first and second low temperature side compressors 7, 13, the cascade heat exchanger 5, first and second low temperature side expansion devices 12, 18, and first and second air heat exchangers 9, 15 in the same casing K. The water heat exchanger is connected to hot water piping H introducing water or hot water heat-exchanged with a refrigerant introduced to the high temperature side refrigerating circuit. The cascade heat exchanger includes a high temperature refrigerant flow passage 5a communicating with the high temperature side refrigerating circuit, a first low temperature refrigerant flow passage 5b communicating with the first low temperature side refrigerating circuit, and a second low temperature refrigerant flow passage 5c communicating with the second low temperature side refrigerating circuit. The plate heat exchanger arranges the low temperature refrigerant flow passages mutually different in both face sides of the high temperature refrigerant flow passage. <P>COPYRIGHT: (C)2013,JPO&INPIT |
