| 摘要 |
PROBLEM TO BE SOLVED: To improve heat exchange efficiency of an evaporator having a plurality of heat transfer tubes (refrigerant paths). SOLUTION: The flow rate of a refrigerant in a plurality of passages 11, 12 supplied with refrigerants 51, 52 from the plurality of heat transfer tubes of the evaporator is controlled by a flow control mechanism 20. The mechanism 20 comprises a plurality of springs 21, 22 having such characteristics that spring constants change according to the change of temperature, and a movable valve element 31 arranged between the springs 21, 22 to constitute a part of internal walls of the plurality of passages 11, 12 and displaceable according to the difference of energizing force of the springs 21, 22. The flow rate of the refrigerant passing through the passages 11, 12 is controlled by the displacement of the movable valve element 31 following the change of the spring constants corresponding to the temperature of the refrigerants 51, 52 passing through the passages 11, 12. A bias spring 42 may be arranged to compress the springs 21, 22 in the flow control mechanism 20. COPYRIGHT: (C)2007,JPO&INPIT
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