Vacuum extraction device

Abstract

The invention relates to a vacuumizing device. The vacuumizing device comprises a cylinder barrel and a piston in sliding fit with the cylinder barrel in the cylinder barrel, wherein the cylinder barrel and the piston define an air extracting space, an air extracting opening is formed in the piston, the air extracting opening communicates with the air extracting space, an annular groove is formed in the outer wall of the piston, a sealing ring is arranged in the annular groove, air outlets are formed in the side face and the bottom face of the annular groove, and the air outlets comprise air outlet grooves formed in the side face of the annular groove and deformation grooves formed in the bottom face of the annular groove. When the cylinder barrel is pressed downwards, the sealing ring deforms towards the deformation grooves, the air outlets communicate with the air extracting space, and air is discharged; and when the cylinder barrel moves upwards, the sealing ring gets attached to the top face of the annular groove, so that a gap between the outer wall of the piston and the inner wall of the cylinder barrel is sealed, and meanwhile the air is extracted from a container. The vacuumizing device is light, small, exquisite, practical, convenient and low in manufacturing cost.

Description

technical field [0001] The invention relates to the field of vacuum pumping, in particular to a vacuum pumping device. Background technique [0002] In the current preservation process of food and medicinal materials, in order to prevent food and medicinal materials from being corrupted due to contact with airborne gases, particles or bacteria, it is often necessary to vacuumize the containers for storing food and medicinal materials. Removing the air, particulate matter and bacteria in the container can prevent these substances from coming into contact with food or medicinal materials; secondly, even if there is some residual air, particulate matter or bacteria, there is not enough air or other substances when these substances cause food or medicinal materials to spoil. Consumable substances, thereby being able to curb the spoilage of food or medicine. [0003] At present, there are two commonly used vacuuming methods. One is to use heating to make the air diverge, and the...

AI Technical Summary

Problems solved by technology

[0003] At present, there are two commonly used vacuuming methods. One is to use heating to make the air diverge, and then seal the container. After cooling, the air pressure in the container can be much lower than the external air pressure. Negative pressure is formed in the container, but the negative pressure is not very large, and the corruption of food or medicinal materials cannot be completely avoided. Moreover, the container needs to withstand high temperature when heating, and the food and medicinal materials in the container must also withstand high temperature. For items that are not suitable for high temperature cannot be processed

The other is to use a vacuum pump to evacuate the container. The vacuum pump has a strong ability to evacuate and has a wide range of applications. However, the price of the vacuum pump is relatively high, and the volume and weight are relatively large.

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