Frequency-conversion air conditioner operation control method and device

Abstract

The invention belongs to the technical field of air conditioner controlling and provides a frequency-conversion air conditioner operation control method and device. The frequency-conversion air conditioner operation control method includes: acquiring a frequency threshold; judging whether a shutdown instruction is received or not during operation of a compressor, and judging whether current operation frequency of the compressor is larger than the frequency threshold or not when the shutdown instruction is received; if yes, reducing operation frequency of the compressor according to preset frequency reduction rate and continuously judging whether the current operation frequency of the compressor is larger than the frequency threshold or not, if not, controlling an inverter to stop outputting. Therefore, the operation frequency of the compressor can be sustained in the preset frequency threshold during shutdown, problems about voltage overshoot of a direct-current bus and overlarge stress impact upon a system pipeline when the compressor is shut down during high-frequency operation are solved, reliability of the high-frequency-conversion air conditioner can be beneficially improved, and service lives of internal electronic devices and cooling / heating system components of the frequency-conversion air conditioner can be favorably prolonged.

Description

technical field [0001] The invention belongs to the technical field of air conditioner control, and in particular relates to an operation control method and device for an inverter air conditioner. Background technique [0002] With the continuous development of modern inverter air conditioner technology, people have higher and higher requirements for the comfort and energy saving of inverter air conditioners. In order to improve the energy efficiency ratio of the inverter air conditioner, people often use a compressor with a higher counter electromotive force constant to improve the efficiency of the compressor. In addition, people hope that the inverter compressor can operate at a higher frequency to improve the cooling / heating effect of the inverter air conditioner, so as to meet people's comfort needs for rapid cooling / heating. When the compressor is running at a higher frequency, if a stop command is received, all inverters of the compressor controller will stop output,...

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Problems solved by technology

[0006] The present invention provides a method for controlling the operation of an inverter air conditioner, aiming at solving the problems existing in the prior art that the DC bus voltage is too high and the system pipeline stress is too large caused by the shutdown of the inverter air conditioner during high-frequency operation.

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