Method, controller and refrigerating equipment for judging freezing point by food odor change

Abstract

The invention relates to the technical field of refrigeration, in particular to a method for judging freezing point by food smell change, a controller and a refrigeration device. The content of smellmolecules volatilized from food at different temperatures is used for judging whether the food is frozen or not. The percentage composition of the smell molecules is combined with temperature controlto control food temperature always in a reasonable range. If the food is frozen, the food can immediately enter a temperature-returning mode to prevent water in the food from continuing to form ice crystal to prevent the food from freezing. When the food temperature rises to a certain temperature, the temperature is immediately reduced, again and again, the food temperature is most of the time oralways remained at 0 DEG C-the freezing point temperature, and the freezing point temperature is at minus 10 DEG C-0 DEG C, the food temperature is reasonably controlled to reach a non-frozen and fresh critical state, and the food is kept not frozen and fresh, the preservation cycle is extended.

Description

technical field [0001] The invention relates to the field of refrigeration control, in particular to a method, a controller and refrigeration equipment for judging the freezing point by the change of food smell. 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 ...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for judging the freezing point based on changes in the smell of food, a controller and a refrigeration device to solve the problem that the time point when 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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