| 摘要 |
PROBLEM TO BE SOLVED: To restrain a carry-over phenomenon of droplets of a liquid refrigerant adhered to an upper cover, in a downward flow liquid film type evaporator for evaporating the liquid refrigerant by a heat transfer pipe group by flowing the liquid refrigerant out of refrigerants under two gas-liquid phase states supplied in a tank through a refrigerant inlet pipe to the heat transfer pipe group by a liquid refrigerant spraying device having an upper cover, a one-stage refrigerant tub and a two-stage refrigerant tub and provided between the heat transfer pipe group in the tank and a steam outlet pipe at an upper part of the tank in an upward and downward direction.SOLUTION: In a downward flow liquid film type evaporator (1), a gap between an upper cover (36) and a one-stage refrigerant tub (34) at a portion near a steam outlet pipe (18) is made narrower than a gap between the upper cover (36) and a one-stage refrigerant tub (34) at a portion away from the steam outlet pipe (18). |
