| 摘要 |
PROBLEM TO BE SOLVED: To provide a refrigeration circuit capable of making an evaporator efficiently exhibit a refrigeration function. SOLUTION: A bypass pipe conduit 20 of an accumulator 6 is provided. A liquid reservoir part 6A of the accumulator 6 and the evaporator 5 are connected by a liquid circulating pipe conduit 24, and a third solenoid valve 25 with an orifice is mounted. The orifice restricts a flow rate of the liquid refrigerant at an accumulator 6 side to lower the pressure, in a state that the pressure is higher than the liquid refrigerant restricted and expanded by an expansion valve 4. In an initial period of an ice making cycle, the bypass pipe conduit 20 is opened, and the liquid circulating pipe conduit 24 is also opened. The liquid refrigerant in the accumulator 6 is circulated in the liquid circulating pipe conduit 24, and the evaporation (vaporization) of the liquid refrigerant at the accumulator 6 side is accelerated in the evaporator 5 by the pressure difference with the liquid refrigerant from the expansion valve 4, whereby the liquid refrigerant in the accumulator 6 is gradually reduced, and the refrigeration function can be exercised in the evaporator 5 during this time. The refrigeration work can be performed in the evaporator 5 from the start of the ice making cycle. COPYRIGHT: (C)2005,JPO&NCIPI
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