| 摘要 |
PROBLEM TO BE SOLVED: To prevent cycle efficiency from lowering by controlling an F fan and an R fan independently from switching operation of a change-over valve after a refrigerant channel is switched from freezing mode to refrigeration mode thereby eliminating shift of refrigerant. SOLUTION: After a refrigerant channel is switched from freezing mode to refrigeration mode, an R fan 54 is operated and an F fan 56 is stopped with a specified time lag. Upon elapsing 5 min after switching the refrigerant channel to refrigeration mode, operation of an R fan 54 is started. As another embodiment, r.p.m. of the R fan 54 is decreased as compared with normal r.p.m. for a predetermined time after switching the refrigerant channel to refrigeration mode. |
