| 摘要 |
PROBLEM TO BE SOLVED: To provide an evaporator capable of reducing the unevenness in temperature distribution by reducing an area where a blowout temperature is increased because of the shortage of liquid-phase refrigerant, in the evaporator where the circulating directions of the refrigerant are opposite to each other between a windward-side path and a leeward-side path. SOLUTION: In a structure where the refrigerant circulating directions are opposite to each other between a windward-side heat exchanging part 20 and a leeward-side heat exchanging part 10, restriction parts 34a, 38b having passage sectional areas S1, S2 smaller than passage sectional areas S0 of upper tank parts 11a, 21a are mounted at inlets of the upper tank parts 11a, 21a of all of downward flow paths 10a, 20a. Whereby a circulating speed of the refrigerant is increased by restriction action of the inlets 34a, 38b at the upper tank parts 11a, 21a of the downward flow paths 10a, 20a, and the refrigerant swiftly flows toward a downstream side in the tank longitudinal direction. Thus the deviation of the liquid-phase refrigerant at an upstream side in the tank longitudinal direction of the upper tank parts 11a, 21a of the downward flow paths 10a, 20a, can be prevented, the distribution of the refrigerant in the downward paths 10a, 20a is improved, and further the uniform temperature distribution can be achieved. COPYRIGHT: (C)2006,JPO&NCIPI
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