| 摘要 |
PROBLEM TO BE SOLVED: To prevent cooling capability from being lowered when temperature of fresh air is abnormally raised and hence the cooling capability reaches a limit. SOLUTION: A pressure switch 8 is provided in which opening and closing are achieved with a change in refrigerant pressure in a radiator 1, and when the refrigerant pressure exceeds first pressure (P1), a power supply circuit to a motor driven pump 6 for pressurizing water in a water tank 5 is switched to on, and water is sprinkled from a nozzle 7 having a plurality of small holes to a fin coil of the radiator 1. When refrigerant pressure is lowered and second pressure (P2, P2<P1) is indicated, the power supply circuit to the motor driven pump 6 is switched off to interrupt the water sprinkling. Hereby, the fin coil of the radiator is cooled with a combination of both air cooling and water cooling, so that there is avoided operation interruption of the apparatus which is caused by lowering of cooling capability when air temperature rises abnormally. Further, rise of the refrigerant pressure is restricted and operation under the abnormal pressure is eliminated to reduce power consumption. Further, the fin coil is cleaned by the water sprinkling, so that cooling efficiency is improved. |
