Lubricating oil heating method of frequency converting air-conditioner compressor

Abstract

The invention relates to a method for heating lube of a frequency conversion air-conditioning compressor. A PWM signal is output through a singlechip; two IGBTs for driving the frequency conversion compressor which are connected with a two-phase coil in the compressor respectively and form a loop are opened; and the coil is heated; one of the IGBTs is closed so that the coil produces opposing electromotive force to form a continuous current loop. The method has the following characteristics: under the environment of lower outdoor temperature, the method allows a frequency conversion air conditioner to carry out heating and melting on the lube effectively, ensures the normal startup of the compressor, avoids the occurrence of faults caused by overcurrent of the compressor, does not add extra hardware equipment, only improves the heating method on the basis of the prior circuit and saves the expense for purchasing an additional electric heating belt.

Description

technical field [0001] The invention relates to a method for heating lubricating oil of an inverter air conditioner compressor, in particular, the inverter air conditioner can effectively heat and melt the lubricating oil in an environment with a low outdoor temperature, so as to ensure the normal start of the compressor and avoid damage caused by the overcurrent of the compressor. cause abnormal phenomena to occur. Background technique [0002] Now, with the enhancement of people's awareness of energy conservation, the application of inverter air conditioners is becoming more and more extensive. At present, the compressor of low-power inverter air conditioner usually does not preheat before starting, but if the outside temperature is low, it will easily cause the lubricating oil to solidify, and the compressor will have a large startup load, which will affect the use and even damage the compressor; The method of tightening the electric heating belt outside the compressor i...

AI Technical Summary

Problems solved by technology

At present, the compressor of low-power inverter air conditioner usually does not preheat before starting, but if the outside temperature is low, it will easily cause the lubricating oil to solidify, and the compressor will have a large startup load, which will affect the use and even damage the compressor; The method of tightening the electric heating belt on the outside of the compressor is adopted. When the external temperature is low, the heating belt is used to heat the lubricating oil; but the cost of using the heating belt is high, and the heating time is long, so the effect is not ideal.

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