| 摘要 |
PROBLEM TO BE SOLVED: To realize a structure for supplying high-temperature refrigerant gas to the lower part of a heat exchanger to be a defrosting object, thereby to surely prevent occurrence of an ice-up phenomenon.SOLUTION: A freezing prevention pipe 66 is arranged below a lowermost heat transfer pipe 63, the freezing prevention pipe connected to a refrigerant flow passage 70a before passing a nozzle hole 70c for distributing refrigerant in a diverging space 75 formed in a refrigerant diverter 70. The freezing prevention pipe 66 comprising the heat transfer pipe 63 and a flat porous pipe has a connection part with the refrigerant flow passage 70a where refrigerant before passing the nozzle hole 70c flows, which is an inlet of refrigerant, and is made into a refrigerant accumulation pipe 67 where refrigerant accumulates without having an outlet of refrigerant.SELECTED DRAWING: Figure 5 |
