Idle time compensating method for compressor of air conditioner

Abstract

An idle time compensating method for compressor of air conditioner which includes a frequency converter outputting drive voltage after inputting PWM drive signal and a compressor running based on the regulated rotating speed after inputting drive voltage of the frequency converter, which includes steps of: equidifferently sensing load state of the compressor corresponding to the rotating of the air conditioner; changing the idle time of the compressor based on the multiple phases corresponding to the equidifferent load state; changing the driving condition of the compressor based on the variable drive signal with idle time of multiple phases.

Description

[0001] This application is a divisional application of the application No. 97108547.9 filed with the Chinese Patent Office on January 2, 1998, entitled "Compensation Method for Dead Time of Air Conditioner Compressor". technical field [0002] The invention relates to a method for driving a compressor in an air conditioner, in particular to a method for compensating the dead time of a frequency converter that responds to the action of the compressor in an air conditioner using a variable speed compressor. Background technique [0003] It is generally believed that a converter is a device that converts alternating current into direct current. On the contrary, a frequency converter is a device that converts direct current into alternating current. Inverter air conditioners are air conditioners that use converters and frequency converters. [0004] Ordinary inverter air conditioners convert a certain AC voltage into DC through rectification, and then convert it into AC, and then...

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Problems solved by technology

[0017] Second, when the compressor 27 is in an overloaded state, the high-power transistors PT1-PT6 of the frequency converter 26 that drives the compressor 27 are also in an overloaded state, so the temperature of the transistors rises and the actual dead time becomes longer. The high-power transistors PT1-PT6 are turned on at the same time to cause a shot phenomenon, which not only destroys the high-power transistors PT1-PT6, but also damages the frequency converter 10

[0019] In addition, in the air conditioner of the prior art, the high-power transistor in the frequency converter that drives the compressor has a certain dead time no matter it is in the normal state or in the load state, so the dead time in the normal state Unnecessary voltage loss will occur in the interval, and in the case of load, the shot phenomenon of the high-power transistor will be caused due to the temperature rise of the transistor, so that the high-power transistor will be destroyed

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