Vacuum freshness retaining box and household electrical appliance employing the same

Abstract

Disclosed is a vacuum fresh box which comprises a box body, a cover body, a drawing device used for the vacuumizing the box body and a releasing device used for canceling the vacuum state of the box body; the drawing deice includes a joint, an air extraction valve connected with the joint and a fixing device used for fixing the air extraction valve; the releasing device includes an air inflation valve and a support device used for maintaining the air inflation valve in the closing position; the drawing device utilizes the air pressure inside and outside the box body to realize the automatic seal of the box body; the releasing device can cancel the vacuum state according to the operation of the operators.

Description

[technical field] [0001] The invention relates to a vacuum sealing device, in particular to a vacuum fresh-keeping box for household appliances, especially a refrigerator. [Background technique] [0002] As we all know, food can be stored for a long time under refrigerated or frozen low temperature. The length of food storage time is not only affected by temperature and humidity, but also by factors such as the oxygen content and bacteria in the air in the food storage environment. In order to make food The preservation time is longer, and people want to provide a low-oxygen, low-bacteria food storage environment, such as vacuum preservation boxes. [0003] European patent EP0405680A2 discloses a kind of vacuum preservation box arranged in the cold room of the refrigerator, such as figure 1 (i.e. Fig.1 of European Patent EP0405680A2), this vacuum preservation box includes a box body 17 and an openable cover body 19 connected to the box body, and a suction nozzle 25 is arran...

AI Technical Summary

Problems solved by technology

The defect of this design is: as long as the refrigerator door 12 is opened, the vacuum preservation box must be inflated and lose the vacuum seal, and the user has no other options; This design does not meet the requirements

Furthermore, because the connection between the suction nozzle 25 and the interface 27 is a detachable unstable connection, after the vacuum preservation box is vacuumized, if the refrigerator cabinet or the vacuum preservation box vibrates and shifts due to the effect of external force, it will It may cause outside air to enter the vacuum preservation box through the suction nozzle 25, so that the vacuum preservation box loses its vacuum seal

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