High-vacuum packing machine with primary heater unit

Abstract

A high vacuum packaging machine with a preheating device comprises a vacuum chamber, a hot pressing air chamber located in the vacuum chamber, a hot seal located below the hot pressing air chamber, a vacuum gauge, a triple valve IDT, a hot seal valve, a charging valve, and a vacuum pump. The vacuum chamber comprises an upper cover and a lower cover which are connected with an interface of the two-bit triple valve IDT through the vacuum valve and pipe lines. The hot pressing air chamber is connected with an interface of the two-bit triple valve IDT through the pipe lines and the hot seal valve. The vacuum pump is connected with the two-bit triple valve through vacuum electromagnetic valve and the pipe lines. The vacuum gauge is connected to one interface of the two-bit triple valve IDT. A preheating device and a temperature control device which is located outside the vacuum chamber and connected with circuit of the preheating device are equipped in the vacuum chamber,. The high vacuum packaging machine with the preheating device of the invention can form vacuum in a short time through heating air of the vacuum chamber and can keep the vacuum to pack products, which improves guarantee period of products largely.

Description

technical field [0001] The invention relates to a heat conduction technology in a vacuum state, which belongs to vacuum and heat transfer engineering technology, in particular to a high vacuum packaging machine with a preheating device for food packaging. Background technique [0002] The food vacuum packaging machines currently on the market are mainly used for simple vacuum packaging of food, and its main purpose is to extend the shelf life of food in a vacuum state. However, if the product is packaged at room temperature, the suction capacity of the vacuum pump is very low, and it can only be pumped to about 1000Pa, and the residual moisture inside the packaged product is too late to evaporate. After the packaged product is placed for a long time, it will be due to internal The release of moisture under negative pressure will quickly destroy the vacuum in the packaging bag. [0003] Such as figure 1 As shown, the existing packaging machine is mainly composed of a vacuum...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a high-vacuum packaging machine with a preheating device, which overcomes the defect of uneven heat conduction in a vacuum state, can form a vacuum in the packaging bag in a relatively short period of time and can maintain such a state. The product is packaged in vacuum, which greatly improves the shelf life of the product

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