Vacuum food preserving box

Abstract

The invention relates to a vacuumized food preservation box, which comprises a preservation box body, a box cover is connected on the box body, a sealing ring is installed between the box body and the box cover, and a vacuum exhaust valve and an air release valve are respectively installed in the box cover. The vacuumized food preservation box is characterized in that the vacuum exhaust valve is provided with a thread valve seat connected with the box cover, an elastic hemispheroid is installed on the thread valve seat, a spring washer is installed on the inner wall of the hemispheroid, valve orifices are produced at the top parts of the elastic hemispheroid and the spring washer, upper valve plates are arranged on the valve orifices, a valve plate fixing cover is installed on the outer wall of the elastic hemispheroid, an exhaust vent is produced in the valve plate fixing cover, a large cover is installed outside the valve plate fixing cover, a convex ring is produced at the opening part under the large cover, the upper part of the convex ring is in contact with the bayonet of the box cover, a spring is installed under the spring washer, a lower valve plate fixing cover and a lower valve plate are respectively installed in the thread valve seat, the other end of the spring is propped against the low valve plate fixing cover, and an air hole is produced in the lower valve plate fixing cover.

Description

technical field [0001] The invention relates to a vacuum food preservation box, which belongs to the field of plastic daily necessities. Background technique [0002] The vacuum food preservation box presses the lid with fingers to compress the hemisphere to let the air out. The existing fresh-keeping box has only one valve on the box cover. When in use, when the hemisphere is pressed, the air in the container is discharged, but the valve cannot be reset, so the exhaust is only once, and it cannot be exhausted repeatedly. It is discharged from the fresh-keeping box. The air is limited, the vacuum is not high, the sealing effect is not good, so the fresh-keeping time is short. Because the user needs to store food for a long time and use it frequently, the shortcomings of the existing technology are: one is that the sealing is not good, causing air leakage; The degree of vacuum is not high, and the third is that the fresh-keeping effect is poor. Contents of the invention ...

AI Technical Summary

Problems solved by technology

The existing fresh-keeping box has only one valve on the cover. When in use, when the hemisphere is pressed, the air in the container is discharged, but the valve cannot be reset, so the exhaust is only once, and it cannot be exhausted repeatedly. It is discharged from the fresh-keeping box. The air is limited, the vacuum is not high, the sealing effect is not good, so the fresh-keeping time is short. Because the user needs to store food for a long time and use it frequently, the shortcomings of the existing technology are: first, the poor sealing will cause air leakage; The vacuum degree is not high, and the third is that the fresh-keeping effect is poor

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