Indoor unit anti-freezing control method for air conditioner

Abstract

The invention belongs to the technical field of air conditioners and particularly relates to an indoor unit anti-freezing control method for an air conditioner. The invention aims at solving the problem that when an existing air conditioner judges the indoor unit freezing condition, the accuracy is low. In order to solve the problem, the indoor unit anti-freezing control method for the air conditioner comprises the steps that when the air conditioner is in a refrigeration working condition, according to the temperature of an indoor coil pipe, the attenuation degree of an overall machine poweraverage value in a second time period relative to an overall machine power average value in a first time period and the attenuation degree of an overall machine current at a second preset moment in the second time period relative to an overall machine current at a first preset moment in the first time period, whether or not the air conditioner is enabled to enter an indoor unit anti-freezing modeis judged. The first time period is located before the second time period, so that the influence of various unrelated factors on the accuracy of a judgement result is effectively reduced, the judgement accuracy is effectively improved, and accordingly it is effectively guaranteed that the air conditioner can quickly and accurately enter the indoor unit anti-freezing mode.

Description

technical field [0001] The invention belongs to the technical field of air conditioners, and in particular relates to an anti-freezing control method for an indoor unit of an air conditioner. Background technique [0002] With the continuous improvement of people's living standards, people have also put forward higher and higher requirements for the living environment. In order to maintain a comfortable ambient temperature, air conditioners have become an essential device in people's lives. Generally, an air conditioner includes an indoor unit, an outdoor unit, and a circulation loop for connecting the indoor unit and the outdoor unit. The heat exchange medium in the air conditioner continuously exchanges heat between the outdoor unit and the indoor unit through the circulation loop, thereby achieving a change in room temperature. Effect. Taking the cooling operation of the air conditioner as an example, the coil of the indoor unit is always at a low temperature; at this t...

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Problems solved by technology

[0005] In order to solve the above-mentioned problems in the prior art, that is, in order to solve the problem of the low accuracy rate of the existing air conditioner in judging the freezing situation of the indoor unit, the present invention provides an indoor unit anti-freezing control method for the air conditioner, The indoor unit includes an indoor coil, and the anti-freezing control method for the indoor unit includes: when the air conditioner is in a cooling condition, acquiring the temperature of the indoor coil and the power of the whole unit within a first time period The average value and the overall machine current at the first preset moment in the first time period and the overall machine power average value in the second time period and the overall machine current at the second preset moment in the second time period ; Calculate the attenuation degree of the average power of the whole machine in the second time period relative to the average power of the whole machine in the first time period; calculate the overall power of the second preset moment in the second time period The attenuation degree of the machine current relative to the whole machine current at the first preset moment in the first time period; according to the temperature of the indoor coil, the average power of the whole machine in the second time period is relative to the set The degree of attenuation of the average value of the overall machine power within the first time period and the integral of the overall machine current at the second preset moment in the second time period relative to the first preset moment in the first time period The degree of attenuation of the machine current, to determine whether to make the air conditioner enter the anti-freezing mode of the indoor unit; wherein, the first time period is before the second time period

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