Self-suction sealing door of refrigerator

Abstract

The invention relates to the technical field of household appliances, and discloses a self-suction sealing door of a refrigerator. The air pressure inside a negative pressure cavity is reduced by extracting an arc-shaped extrusion rod from the negative pressure cavity, and the effect is transmitted to flow-limiting devices through an air guide hole and an air guide groove at the same time; due tothe fact that the cross-sectional shape of a flow-limiting hole in each flow-limiting device is funnel-shaped, and an outer aperture R1 is larger than an inner aperture R2 which is larger than a middle aperture R3, each flow-limiting hole has a gas flow restriction, and the closing speed is high; the external air is difficult to enter the air guide groove and the air guide hole through the flow-limiting holes; and when a refrigerator door is completely closed, outer accommodating cavities make contact with the flow-limiting devices so as to abut against and open the flow-limiting holes and toenable the internal low air pressure to act on locking devices, bullet-shaped shooting needles are subjected to suction force to move, the tip of each bullet-shaped shooting needle enters the R3 of the corresponding flow-limiting hole and makes contact with a flow-limiting plate, the external force required by the door opening is improved, the probability that the refrigerator door is mistakenly opened is reduced, and the effect of the mistaken opening prevention function of the device is improved.

Description

technical field [0001] The invention relates to the technical field of household appliances, in particular to a self-suction airtight door of a refrigerator. Background technique [0002] The refrigerator is a kind of compressor that increases and decreases the pressure of the refrigerant, so that the refrigerant liquefies and releases heat on the outside of the refrigerator, and at the same time vaporizes and absorbs heat inside the refrigerator, so that the inside of the refrigerator can maintain a lower temperature. Keep the food and ingredients placed inside at a lower temperature to prolong its storage time. The existing refrigerator door is generally sealed by the adsorption effect of the magnetic adhesive strip installed on the door frame. This structure is relatively simple and practical. Stronger and lower production costs. [0003] However, the magnetism of the magnetic strip will gradually weaken with the increase of use time. In the end, the adsorption capacity ...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies in the use process of the existing refrigerator door proposed in the background technology, the present invention provides a refrigerator self-priming airtight door, which can be assisted in closing when the magnetism of the magnetic suction strip is weak, and solves the problem of The problem that the magnetic suction strip of the traditional refrigerator door cannot be closed well after the magnetism becomes weak

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