Air-conditioner control system

Details Air-conditioner control system Air-conditioner control system

1988-11-29

1990-02-20

Tanner, Harry B.

Refrigeration

With indicator or tester

Operatively correlated with automatic control

62127, 236 94, F25B 4900

Patent

active

049015362

ABSTRACT:
A control system for controlling an actuator and a display unit of an air-conditioner, and a method of adjusting the control system. An operational amplifier executes calculation on the basis of analogue data from a plurality of temperature-data input terminals. An output from the operational amplifier is sent to a microcomputer through an A/D converter. In a normal control mode, the microcomputer controls the display unit and the actuator of the air conditioner. The microcomputer executes also an adjusting mode in which the microcomputer controls the display unit to display an outut voltage from the operational amplifier. The microcomputer selects one of the modes to be executed in response to a mode signal from a mode-signal generator. A reference voltage is inputted to the operational amplifier from a reference-voltage generating circuit. The reference voltage is adjusted such that the output voltage from the operational amplifier displayed on the display unit is brought to a predetermined standard level.

REFERENCES:
patent: 4685615 (1987-08-01), Hart
patent: 4715191 (1987-12-01), Umemura et al.
patent: 4819714 (1989-04-01), Otsuka et al.
Mazda Service Manual of Auto Air Conditioner, Cat. No. 525179, 4/1984.

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