| 摘要 |
PROBLEM TO BE SOLVED: To reduce the size of a circuit and to decrease a cost by deciding a rotational speed of a compressor according to a temperature change of a room partitioned from an exterior to be cooled by an evaporator or a time change. SOLUTION: In the inverter for a refrigerating system, a compressor 12 constitutes a cooling system together with a condenser 13, a pressure-reducing unit 14 and an evaporator 15. The air cooled by the evaporator 15 and circulated by an indoor fan 18 is forcibly circulated through a room 20 partitioned by a heat insulation wall 19 to cool the room 20. A temperature input circuit 24 for detecting a temperature of the room 20 inputs its output to the inverter 11, and a rotational speed of the compressor 12 is decided according to a temperature change of the circuit 14 or a time change. Thus, an electronic control circuit like prior art can be eliminated merely by providing the circuit 24 in the inverter 11 to reduce the size of the circuit, thereby reducing its cost. |
