Refrigeration and freezing apparatus airtightness inspecting method and refrigeration and freezing apparatus

Abstract

The invention provides a refrigeration and freezing apparatus airtightness inspecting method and a refrigeration and freezing apparatus. The inside of the storage chamber of the refrigeration and freezing apparatus is provided with a sealed space which is filled with nitrogen to keep the food inside fresh. The inspection method includes detecting the nitrogen concentration in the sealed space, determining that nitrogen concentration inside the sealed space is maintained at a preset maintenance time in the concentration range to be detected, and calculating the time difference between the maintenance time and the preset statistic time. If the time difference is greater than the preset threshold, it is determined that the airtightness of the sealed space doesn't reach the preset requirement; and if the time difference is less than or equal to the preset threshold, it is determined that the airtightness of the sealed space reaches the preset requirement. According to the inspection method, whether the airtightness of a sealed box meets the pre-set requirements can be determined based on the change time for the nitrogen concentration in the sealed space, and the condition that the sealed box is not tightly sealed can be found timely.

Description

technical field [0001] The invention relates to the field of item storage, in particular to an airtightness inspection method for a refrigerating and freezing device and the refrigerating and freezing device. Background technique [0002] In order to improve their own fresh-keeping effect, some current refrigerating and freezing equipment will install a nitrogen generator inside, and fill the sealed box or sealed drawer in the room with nitrogen to inhibit the aerobic respiration of the food itself and the growth of microorganisms. [0003] For this type of refrigerating and freezing equipment, after the user opens the sealed box to take and place the food, there will be a situation that the user forgets to close the sealed box or closes the sealed box laxly. For example, a sealed box with a drawer is not tightly sealed because the user forgets to close the drawer or does not push the drawer to the bottom. Another example is a sealed box with a pivotable door body, which is ...

AI Technical Summary

Problems solved by technology

For example, a sealed box with a drawer is not tightly sealed because the user forgets to close the drawer or does not push the drawer to the bottom. Another example is a sealed box with a pivotable door body, which is not tightly sealed because the user does not close the door tightly. Yan etc.

These conditions will lead to the rapid loss of nitrogen in the sealed box, thereby affecting the freshness of food

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