Control method for suppressing frosting of air conditioner

Abstract

The invention belongs to the technical field of air conditioners, and particularly relates to a control method for suppressing frosting of an air conditioner. In order to effectively suppress the frosting speed of the air conditioner, the control method for suppressing frosting of the air conditioner comprises the following steps: a current value of an outdoor fan of the air conditioner is detected in real time; if the detected real-time current value is equal to a standard current value, the current value I<n> of the outdoor fan of the air conditioner is detected every first preset time, andif the difference between I<n> and I<n-1> is greater than or equal to a set current value, the rotating speed of the outdoor fan is controlled to be the second rotating speed, wherein the standard current value is the current value, measured in the state that the outdoor fan is not frosted, of the outdoor fan; 50 revolutions subtracted from the first rotating speed is the second rotating speed; and I<n-1> is the current value detected in the previous time of I<n>, n is a positive integer greater than 1, and the first rotating speed is the rotating speed when the outdoor fan is at the highest gear. The rotating speed of the outdoor fan is adaptively adjusted according to the current of the outdoor fan, and thus the frosting speed of the air conditioner is effectively decreased.

Description

technical field [0001] The invention belongs to the technical field of air conditioners, and in particular relates to a control method for suppressing frost formation of an air conditioner. Background technique [0002] As a device that can adjust the indoor ambient temperature, the air conditioner works on the principle that the indoor ambient temperature is reduced or increased by the refrigerant passing through the circulation pipeline through high-pressure / low-pressure / gas / liquid state transitions, that is, from From the perspective of the indoor unit, the air conditioner is in cooling or heating mode. When the air conditioner is in heating operation, if the temperature of the outdoor coil is too low under certain humidity conditions, it will cause frosting, and the frosting of the outdoor coil will reduce the heat exchange efficiency of the outdoor heat exchanger and affect the cooling performance of the air conditioner. The thermal effect reduces the comfort of the in...

AI Technical Summary

Problems solved by technology

When the air conditioner is in heating operation, if the temperature of the outdoor coil is too low under certain humidity conditions, it will cause frosting, and the frosting of the outdoor coil will reduce the heat exchange efficiency of the outdoor heat exchanger and affect the cooling performance of the air conditioner. The thermal effect reduces the comfort of the indoor environment and affects the user experience

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