Method and device for starting fan of air conditioner outdoor unit

Abstract

The invention discloses a method and device for starting the blower of anoutdoor unit of an air conditioner. The method comprises the following steps: a positioning current is fed in the blower through an inverter, so as to enable the blower to be positioned in a first position; when the blower is positioned in the first position, the first current of the first phase of the inverter and the input voltage of the inverter are obtained; the stator resistance of the blower is obtained through calculationof the first current of the first phase of the inverter and the input voltage of the inverter; thestarting parameters of the blower are determined according to the stator resistance of the blower; the blower is started by using thestarting parameters. According to the method and device provided by the invention, that accurate startingparameters are determined under various working conditions is realized, so that the blower of the outdoor unit of the air conditioner can be started smoothly, therefore, that the blower, driven by the positionsensor-less, of the outdoor unit of the air conditioner can be started smoothly under various working conditions is realized, and the reliability of the blower starting is ensured.

Description

technical field [0001] The invention relates to the field of air conditioner control, in particular to a method and device for starting a fan of an air conditioner outdoor unit. Background technique [0002] The permanent magnet synchronous motor fan in the outdoor unit of the inverter air conditioner driven by a position sensor generally operates under harsh working conditions (such as strong external wind, low temperature or high temperature, etc.), and its operating temperature range is large, and it can operate at subzero temperatures. Working within the temperature range of 30 degrees Celsius to 54 degrees Celsius above zero, the resistance of the stator winding of the outdoor fan of the inverter air conditioner changes with the temperature. Therefore, in the harsh environment of the outdoor unit of the inverter air conditioner, the stator resistance of the fan also changes greatly. However, in the case of the outdoor unit fan of the inverter air conditioner driven by t...

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Problems solved by technology

[0004] Aiming at the problem in the related art that the start-up control system of the outdoor fan of the air conditioner cannot accurately control the start-up of the fan of the outdoor unit of the air conditioner due to the influence of the environment, resulting in poor start-up performance or even failure of the fan of the outdoor unit of the air conditioner, no effective solution has been proposed so far. For this reason, the main purpose of the present invention is to provide a method and device for starting the fan of an air conditioner outdoor unit, to solve the above problems

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