| 摘要 |
PURPOSE:To elevate the evaporation temperature of a heat exchanger on the air heating source side, and to prevent a frosting on a box by forcibly driving a motor for an outdoor fan and operating the outdoor fan at a high air flow rate when the temperature of the outside air gradually drops and the frosting is easily generated on heating operation. CONSTITUTION:A first electromagnetic switch 5, which singly interrupts a motor 2 for an outdoor fan related to a heat exchanger on the air heating source side to a power supply pole for a frequency variable generator and a second electromagnetic switch 6 singly interrupts the motor to a power supply pole for a commercial power supply are provided while a pressure detector 8 detecting low pressure on a heating cycle is mounted to a refrigeration circuit for the titled air conditioner. The first electromagnetic switch 5 is energized and the second electromagnetic switch 6 is deenergized by pressure signals of fixed pressure or more, and the first electromagnetic switch 5 is deenergized and the second electromagnetic switch 6 is energized by pressure signals lower than fixed pressure. The outdoor fan motor 2 is driven in a high-speed region, the capability of heat exchange in the heat exchanger on the air heating source side is improved and an evaporation temperature is elevated for a period when the temperature of the outside air drops and a frosting is easily generated, and the frosting is prevented.
|
