Method, system and air conditioner for controlling wind speed and frequency limit of indoor unit of DC inverter air conditioner

Abstract

The invention provides a wind speed frequency limiting control method for a direct current variable frequency air conditioner indoor unit. The wind speed frequency limiting control method comprises the step that according to the current operation mode of an air conditioner, a compressor is controlled to be operated on the basis of a frequency limiting protection scheme of the corresponding relation of the indoor unit preset wind speed and the maximum operational frequency. When the air conditioner is started, the maximum operational frequency, corresponding to the indoor unit preset wind speed, of the compressor is limited, so that the situation that the pressure of an air conditioner system is too high, the back pressure of the compressor is too high, and hiss noise and buzz noise occur in a room due to the fact that a user sets the preset wind speed of the indoor unit to be low, and the compressor of the air conditioner system operates at a high frequency is avoided, and the user experience is improved.

Description

technical field [0001] The invention relates to the technical field of air conditioner control, in particular to a method, system and air conditioner for controlling the wind speed of an indoor unit of a DC frequency conversion air conditioner. Background technique [0002] At present, there are various abnormal noises in the unitary inverter air conditioner when the indoor unit is running at low wind speed, which is very difficult to solve, such as the "silky" refrigerant noise caused by the rapid flow of the refrigerant in the indoor evaporator in the cooling mode and the compressor in the heating mode. The "humming" noise introduced into the indoor unit during high-frequency operation affects the comfort of users. At present, this type of noise is reduced by adding various mufflers, which cannot be completely solved, but it brings problems such as high cost and low production efficiency. Contents of the invention [0003] The invention provides a method, a system and a...

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Problems solved by technology

[0002] At present, there are various abnormal noises in the unitary inverter air conditioner when the indoor unit is running at low wind speed, which is very difficult to solve, such as the "silky" refrigerant noise caused by the rapid flow of the refrigerant in the indoor evaporator in the cooling mode and the compressor in the heating mode. The "humming" noise introduced into the indoor unit during frequency operation affects the comfort of users

At present, all kinds of mufflers are used to reduce this kind of noise, which cannot be completely solved, but it brings problems such as high cost and low production efficiency.

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