| 摘要 |
PROBLEM TO BE SOLVED: To improve the refrigeration capacity (endothermic capacity) at least in a vaporizer. SOLUTION: A mixed refrigerant is employed as a refrigerant in the ejector cycle. The change of refrigerant discharged from a nozzle 410 (ejector 400) takes place isentropically, so that dryness of the refrigerant immediately after the reduced pressure becomes small. Accordingly, a gas-liquid two-phase refrigerant of low dryness can be supplied to a gas-liquid separator 500. Further, although when liquid phase refrigerant is supplied to the vaporizer by the gas- liquid separator, in this case gas-liquid two-phase refrigerant of a low dryness is supplied to the separator, so that the rate of the gas-phase refrigerant, contained in the refrigerant supplied from the separator to the vaporizer, becomes small; and as a result, the range of variation of a pressure loss generated in supply of the refrigerant from the separator to the vaporizer becomes small, and the change in the refrigerant temperature (vaporization temperature) in the vaporizer can be reduced.
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