AIR CONDITIONER

• Main Authors: YAMAGUCHI NOBUYUKI, TOYODA DAISUKE
• Format: Patent
• Language: English
• Published: 21.05.2009
• Subjects: AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING; BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; RANGES; VENTILATING; WEAPONS

PROBLEM TO BE SOLVED: To provide an air conditioner stably carrying out an outdoor fan control for securing a differential pressure during cooling operation. SOLUTION: An outdoor fan rotational speed control controls a rotational speed of an outdoor fan 7 such that a temperature of an outdoor heat exchanger 3 becomes a target temperature, based on a temperature difference between a temperature of an indoor heat exchanger 5 detected by an indoor heat exchanger temperature sensor 21 and the temperature of the outdoor heat exchanger 3 detected by an outdoor heat exchanger temperature sensor 11. A temperature zone of the outdoor heat exchanger 3 is divided into an up zone, a changeless zone, and a dropping zone in an order from a higher temperature, the outdoor fan rotational speed is increase in the up zone, the outdoor fan rotational speed is not changed in the changeless zone, and the outdoor fan rotational speed is lowered in the dropping zone in an outdoor fan rotational speed control part 30a. The up zone and the dropping zone are respectively further divided into pluralities of zones, and the outdoor fan rotational speed is controlled such that a manipulated variable per unit time of the outdoor fan rotational speed becomes smaller in zones nearer to the changeless zone in the up zone and the dropping zone. COPYRIGHT: (C)2009,JPO&INPIT