Method, controller and refrigeration equipment for judging chill point according to changing of food colors

Abstract

The invention relates to the field of refrigeration control, in particular to a method, a controller and refrigeration equipment for judging a chill point according to changing of food colors. Whetherfood is under the refrigeration condition can be judged according to color difference values of surface colors of the food at the various temperatures. The colors of the food and the temperature control are combined to control food temperature to be always in the rational range. If the food is under the refrigeration condition, temperature recovery mode is initiated to prevent internal water of the food from continuously forming ice crystal to enable the food to be not refrigerated, the temperature is decreased when the food temperature reaches one value and is repeated multiple times, the food temperature is moestly or always maintained at the temperature of 0 DEG C-chill point temperature, the chill point temperature is at the temperature of minus 10-0 DEG C, the food temperature is rationally controlled to reach an unfreezing and fresh critical state, unfreezing and fresh of the food can be guaranteed, and the fresh period can be prolonged.

Description

technical field [0001] The invention relates to the field of refrigeration control, in particular to a method for judging the freezing point by color change of food, a controller and refrigeration equipment. Background technique [0002] In order to extend the shelf life of food, freezing technology has always been the most common and effective method. For example, frozen meat at -18°C can generally be stored for 6 to 12 months, but the most serious problem is that it is inconvenient to thaw, and the food quality after thawing and The taste has dropped significantly. [0003] At present, it mainly depends on obtaining the temperature value of the food to judge whether the food is in a frozen state. The methods for obtaining the temperature mainly include: [0004] 1. Non-contact temperature sensors, such as infrared sensors: Infrared sensors with an accuracy of 1°C cannot obtain the accurate temperature value of the food, so it is impossible to accurately judge whether the ...

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Problems solved by technology

[0007] The object of the present invention is to provide a method for judging the freezing point based on the color change of food, a controller and a refrigeration device, so as to solve the problem that the time point when the food enters the frozen state is not easy to control, and the food is prone to freezing; and after freezing, it is inconvenient to thaw and the quality of the food deteriorates The problem

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