Method for detecting whether refrigerator contains objects with abnormal temperature or not

Abstract

The invention provides a method for detecting whether a refrigerator contains objects with abnormal temperature or not. The refrigerator comprises a refrigerator body and at least one infrared sensor, wherein the interior of the refrigerator body is divided into at least one storage space, and the infrared sensors are used for sensing temperatures of the storage spaces. The method comprises the steps that the infrared sensors collect the temperature value after a door body is opened; if the absolute value of the difference between the temperature value collected currently and the temperature value collected last time by any infrared sensor is larger than the preset variation value, the first temperature value collected by the infrared sensor before the objects with abnormal temperature are placed and the corresponding collection frequency are obtained, and the second temperature value collected by the infrared sensor after the objects with abnormal temperature are placed and the corresponding collection frequency are also obtained; the second temperature changing value is worked out according to the formula of delta TA=(ln(m)-ln(n))*Q / S; and whether the storage spaces contain the objects with abnormal temperature or not is judged according to the first temperature value, the second temperature value and the second temperature changing value. The method can accurately judge whether a certain storage space contains overheated food or not.

Description

technical field [0001] The invention relates to refrigeration and freezing equipment, in particular to a method for detecting whether items with abnormal temperature are placed in the refrigerator. Background technique [0002] Traditional refrigerators usually use a temperature sensor arranged inside the storage compartment to sense the temperature around the location where it is arranged, and use the temperature as a basis for refrigeration control. When using this control method to control the refrigerator, when the temperature measured by the temperature sensor is higher than the preset value, the refrigerator starts cooling. However, when the storage compartment is divided into a plurality of relatively independent storage spaces by the shelf partition, if the user puts hot food with a higher temperature into a certain storage space of the refrigerator, on the one hand, the temperature of the hot food Putting it in will affect the temperature of the storage space where...

AI Technical Summary

Problems solved by technology

However, when the storage compartment is divided into a plurality of relatively independent storage spaces by the shelf partition, if the user puts hot food with a higher temperature into a certain storage space of the refrigerator, on the one hand, the temperature of the hot food Putting it in will affect the temperature of the storage space where it is located, so that various bacteria that originally existed in the food inside the refrigerator can grow faster, which is not conducive to the healthy and safe preservation of food; on the other hand, if the storage room Indiscriminate refrigeration as a whole will cause waste of electric energy and slow cooling of the storage space where hot food is placed

[0003] In addition, when the refrigerator door is opened, putting in hot food with a higher temperature will cause the temperature of the storage space to change, and the storage space without hot food will also be heated due to natural convection between the external environment and the storage compartment. Exchange causes temperature changes, but there is no proper discrimination method to distinguish the above two situations in the prior art, resulting in inaccurate refrigeration control of refrigerators in the prior art

However, to increase the hardware cost of the refrigerator too much, and to provide a discrimination method that can more accurately distinguish the above two situations is a technical problem that has been eager to be solved in the refrigerator technology field but has not been solved all the time.

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