To provide a show case capable of restricting a total electric power for a fan motor for a condenser air-cooling fan and a compressor while restricting a forced passing through a resonance point to attain an energy-saving state.
This invention relates to a show case which has a condenser air-cooling fan for making sub-cool state, the condenser air-cooling fan can control the number of revolution and a compressor also can control the number of revolution in order to attain capability suitable for cooling capability. When a revolution speed of the compressor is changed according to a variation of required cooling capability and further when the number of revolution of the compressor shows a natural frequency of a show case piping etc. of 10 to several Hz or less in order to attain the modification, the fan speed of the condenser air-cooling fan is increased to attain sub-cool state and the speed of revolution of the compressor is not increased.
| JPS6027338 | [Title of the device] Cooling case |
HOSAKA TAKASHI
TOKUCHI MASAYUKI
MITSUBISHI ELECTRIC APPLIED REFRIGERATION SYSTEMS CO LTD
Tadahiko Inaba
Kanako Murakami