A time-sharing variable frequency refrigeration equipment defrosting energy-saving control method and system

Abstract

This application relates to the field of energy-saving control technology and discloses a time-sharing variable frequency collaborative defrosting energy-saving control method and system for refrigeration equipment. The method includes: collecting operating parameters; activating the collaborative defrosting process; estimating the estimated temperatures of the first and second temperature zones based on a material temperature estimation model and constructing steady-state variables; calculating the defrosting index; setting a dynamic duration upper limit based on operating parameters and steady-state variables; determining whether to defrost immediately or delay defrosting; initiating defrosting; ending defrosting when a defrosting interruption condition is triggered; adjusting the cooling capacity distribution ratio and the circulating fan speed; and determining whether to exit the collaborative defrosting process based on the current frost risk index and steady-state variables. This application matches the defrosting timing and duration with the actual state of the two temperature zones, thereby avoiding premature, late, excessive, or insufficient defrosting, reducing material temperature fluctuations during defrosting, and improving the material temperature stability of the two temperature zones.

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