| 摘要 |
PURPOSE:To decrease a power consumption, to reduce noises and to improve a cooling efficiency by providing a switching means for switching the rotating speed of a fan motor in accordance with the difference between a temperature in a refrigerator and a setting temperature and a door opening and closing state. CONSTITUTION:In case where a compressor 6 is not actuated, when a temperature in a refrigerator is higher by X deg.C or more and by than a setting temperature, a relay 19 is actuated and a capacitor 17 for driving a fan motor 5 is selected to continuously energize a phototriac 16 (high speed rotation). When a temperature difference is lower than Z deg.C. the relay 19 is turned off and a capacitor 20 is selected to continuously energize the phototriac 16 (middle speed rotation). During the operation of the compressor 6, when the temperature in the refrigerator is lower by X deg.C or more than the setting temperature, the compressor 6 and the fan 5 are stopped. When the temperature difference is below -X deg.C and within Y deg.C, if the time of a door closing state exceeds a prescribed time A, the capacitor 20 of the fan motor 5 is selected to control the phase of the phototriac 16 and rotate the fan at low speed. When the door closing time does not reach the prescribed time A, the fan is rotated at middle speed. |
