Vacuum packaging machine and vacuum packaging method

Abstract

A vacuum packaging machine comprises a supporting base, a cover plate, a vacuumizing device and a retractable air charging device. The cover plate is arranged on the supporting base, a sealed containing cavity is formed when the supporting base and the cover plate are buckled, the vacuumizing device is communicated with the sealed containing cavity, the retractable air charging device is arranged in the sealed containing cavity and provided with an air inlet. By means of the vacuum packaging machine, high vacuum packaging efficiency and high vacuum packaging quality are achieved. The invention further relates to a vacuum packaging method for products.

Description

technical field [0001] The invention relates to the technical field of vacuum packaging, in particular to a vacuum packaging machine and a vacuum packaging method. Background technique [0002] In order to better protect electronic, mechanical or food products, many companies vacuum-pack such products to delay the physical or chemical changes of the products. [0003] figure 1 It is a schematic diagram of the structure of the existing vacuum packaging machine for vacuum packaging. Such as figure 1 As shown, at present, the cover plate 210 of the inner pumping vacuum packaging machine 200 cooperates with the supporting base 220 to form a closed accommodation chamber 201, and the vacuum suction pipe 232 of the vacuum pump 230 communicates with the accommodation chamber 201, and is controlled by a solenoid valve 240. The vacuum pump 232 is turned on and off to vacuum the accommodating chamber 201 by the vacuum pump 230 . When the product needs to be vacuum-packed, it is onl...

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Problems solved by technology

[0004] However, when the existing internal pumping vacuum packaging machine 200 vacuum-packs products, after vacuum packaging a product, it is necessary to open the cover plate 210, take out the vacuum-packed product, and then put it into another container containing the product. The packaging bag 30 is vacuum-packed, and the storage chamber 210 is full of air at this time. It is necessary to use the vacuum pump 230 to extract the air in the storage chamber 201 again to further extract the air in the packaging bag 30.

However, the accommodating chamber 201 has a large space, and it takes a long time to extract the air in the accommodating chamber 201 each time, resulting in low efficiency of vacuum packaging

Moreover, when the existing internal pumping vacuum packaging machine 200 vacuum-packs the product, there is likely to be residual air in the packaging bag 30, and the residual air will oxidize the product in the packaging bag 30, thereby affecting the quality of the product.

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