Control method for variable frequency air conditioner

Abstract

The invention provides a control method for a variable frequency air conditioner. The control method includes the following steps of obtaining multiple target direct-current bus voltages according to the voltage of a direct-current bus in the variable frequency air conditioner, wherein each target direct-current bus voltage corresponds to one operating point; detecting the current voltage of the direct-current bus, carrying out PFC control so as to improve the current voltage of the direct current bus to the corresponding target direct-current bus voltage, carrying out field weakening control and vector control on a compressor according to the corresponding target direct-current bus voltage and the rotation speed instruction of the compressor of the variable frequency air conditioner, calculating the variable frequency efficiency, corresponding to each operating point, of the variable frequency air conditioner according to the running condition of the compressor so as to obtain the optimal variable frequency efficiency of the variable frequency air conditioner, and controlling the variable frequency air conditioner to operate according to the direct-current bus voltage corresponding to the optimal variable frequency efficiency. The control method for the variable frequency air conditioner is simple in algorithm, small in operation amount, capable of reducing operation losses and improving operating efficiency, and low in implementation cost.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a control method for frequency conversion air conditioners. Background technique [0002] As people pay more and more attention to energy issues, the requirements for energy-saving performance of household appliances are also getting higher and higher. Air conditioners are household appliances that consume a lot of power, and their power consumption is particularly concerned. [0003] In order to improve the operating efficiency of the air conditioner, an energy-saving control method based on machine vision is proposed in the prior art. This method collects images through a camera installed on the indoor unit of the air conditioner, uses machine vision algorithms to estimate the position of people in the room, and On-demand cooling can be achieved by making control actions that can improve efficiency at the location of the air conditioner. However, on the one hand, this...

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Problems solved by technology

[0003] In order to improve the operating efficiency of the air conditioner, an energy-saving control method based on machine vision is proposed in the prior art. This method collects images through a camera installed on the indoor unit of the air conditioner, uses machine vision algorithms to estimate the position of people in the room, and On-demand cooling can be achieved by making control actions that can improve efficiency at the location of the air conditioner. However, on the one hand, this method requires the indoor unit of the air conditioner to be equipped with a camera, which increases the cost; complex

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