A refrigerator with adjustable sealing strength and its working method

Abstract

The invention discloses a refrigerator with adjustable sealing strength and a working method thereof. It is composed of door opening switch, weak sealing switch, medium sealing switch, medium strong sealing switch, strong sealing switch, automatic sealing switch and power supply. In the air cavity below, the magnetic force of the permanent magnet is weakened by adjusting the current in the coil, which plays a role in adjusting the sealing force of the refrigerator; the refrigerator includes automatic adjustment and manual adjustment of the sealing strength. In the automatic mode, the sealing strength of the refrigerator is adjusted according to the user's schedule Work and rest time changes. In manual mode, there are five modes for users to choose: forced door opening, weak seal, medium seal, medium strong seal, and strong seal. The invention comprehensively considers easy door opening and sealing strength, and provides a long-term working method with adjustable sealing strength.

Description

Technical field [0001] The present invention belongs to the field of refrigerator sealing, and more particularly to a refrigerator that adjusts the sealed strength. [0002] technical background [0003] The refrigerator is responsible for the task of long-term low temperature storage food, which has high requirements for sealing strength. However, the current refrigerator industry has certain contradictions in optimizing the strength of the sealed strength: On the one hand, in order to enhance the sealing performance, reduce the heat exchange, due to the magnetic strip is the permanent magnet, the magnetic force is not adjustable, generally to the door sealing structure, material constantly improvement On the other hand, since the optimal tension of the door is 30 to 80 N, if the seal is too strict, during the cooling process, the internal wet air temperature is lowered, the pressure is small, so that the internal and external pressure is high, according to F a,in = ΔP × S, the d...

AI Technical Summary

Problems solved by technology

[0005] 1) Neither of the two schemes considers the sealing guarantee under the condition of sudden power failure of the refrigerator. When the external power is cut off, the electromagnetic door seal of the scheme one completely loses most of the magnetic attraction force and the sealing strength is very small. The coil winding of the scheme two The magnetic force is lost, and the sealing strength is reduced by half. In the case of no cooling inside the refrigerator, the sealing strength is greatly reduced, which is extremely unfavorable for food storage;

[0006] 2) Option 1 basically relies on the helical coil to be energized to achieve sealing. The refrigerator is closed for a long time, which means that a relatively high-intensity current needs to be passed to the helical coil for a long time, which is likely to cause heating of the magnetic strip. High temperature not only affects the sealing effect There are also certain security risks;

[0008] 4) Neither of the two schemes considers the insulation of the coil, which has safety risks, and only one working mode is given in the closed state, and the function of switchable sealing strength cannot be realized

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