To prevent the fracture of a constituent appliance of a high order-side refrigerating system by allowing a low order-side refrigerant to flow into the high order-side refrigerating system even if a double tube type heat exchanger is used as a cascade capacitor in a binary refrigerating system using a carbon dioxide as the low order-side refrigerant, and a hydrocarbon refrigerant as a high order-side refrigerant.
In this binary refrigerating system composed of the low order-side refrigerating system using the carbon dioxide as its refrigerant, and the high order-side refrigerating system using the hydrocarbon refrigerant as its refrigerant, the double tube type heat exchanger comprising a cavity 21 communicating with the outside on an intermediate position between an inner tube and an outer tube is used as a cascade heat exchanger 13.
COPYRIGHT: (C)2007,JPO&INPIT
| JPH0684851 | PROBLEM TO BE SOLVED: To operate an air conditioner using a heat pump. |
| WO/2009/007435 | METHOD AND APPARATUS FOR COOLING A HYDROCARBON STREAM |
| JP2014074507 | CASCADE CYCLE SYSTEM |
SAKAI TOSHIKAZU
KANESHIRO KENJI
Hiroki Naito
Daisuke Nagano
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