| 摘要 |
PURPOSE:To prevent suden change in discharge temperature of an air conditioner used for a car and the like by changing operational logic of control operation circuit correspondignly to working or no working of a refrigerant compressor so that an air mix door is promptly moved in response to intermittent operation of said compressor. CONSTITUTION:A microcomputer 2 inputs respective data of set temperature Ts3, compartment temperature Tr4, open air temperature Ta5 and feedback potentio theta59, while it controls a warm water valve 53, an electromagnetic clutch 9 of a compressor 51 and further opening of an air mix door 1. The opening control quantity Y is found by adding, the fime integral of Ta correction and compensation for remaing deflection to the difference (Tr-Ts). Thus obtained opening theta of the door 1 is set to satisfy the fomula theta=-AY+B when the compressor 51 is in ON state, while it is set to satisfy the formula theta'=-A'Y when the compressor 51 is in OFF state. Thus, the door 1 can be shifted step-like in such a direction as to prevent a suden change of discharge temperature at the time of OFF state by changing a characteristic formula correspondingly to working or no working of the compressor. |
