Noise control of air conditioner

Abstract

An air conditioning apparatus having a condenser fan, an evaporator fan, a compressor, at least two motor for driving the fans and the compressor, and being responsive to vibration of the apparatus to control the speed of each motor to reduce the vibration. In its preferred embodiments, the apparatus performs a test to determine optimum speeds of the motors to minimize the vibration. The apparatus uses a microcomputer, operative during the test to change the speed of at least one of the motors to each of a plurality of different speed values within a predetermined speed range, and at least one vibration detector. The detector detects values of the vibration when the motors are operating at the different speed values. At the end of the test, the motors are controlled to operate at the speed value at which the vibration is minimized.

Dependencies are inferred from the claim text.