Vending machine capable of selling air automatically

Abstract

The invention relates to the technical field of vending machines, in particular to a vending machine capable of selling air automatically. The vending machine comprises a cabinet and an air cylinder weighing unit used for weighing an air cylinder, an electromagnetic valve is mounted on an air pipe, a PLC (programmable logic controller), an operation panel and a bill receiving unit used for making payment are arranged on the cabinet, and the PLC controls the operation panel, the bill receiving unit, the electromagnetic valve and the air cylinder weighing unit respectively. The air cylinder weighing unit is used for weighing the air cylinder to obtain inflatable weight; when the air is needed to buy, quantity is selected through the operation panel, bills are placed into the bill receiving unit, the PLC receives data and controls the electromagnetic valve to open or close, automatic air supply of a quick air delivery joint is realized, a front cabinet door is closed in weighing so as to be locked by an electromagnetic lock controlled by the PLC, the air cylinder is unaffected by any external influence in weighing, weighing is more accurate, the purpose of automatic selling is realized, and huge market potential is achieved.

Description

technical field [0001] The invention relates to the technical field of vending machines, in particular to a vending machine for automatic gas vending. Background technique [0002] Vending machine is a kind of equipment to realize the autonomy and automatic transaction of goods. It has existed in the market for a long time. It is divided into food machine, beverage machine, daily necessities, etc., and it is widely used in relevant countries. Mainly distributed in crowded areas, such as railway stations, bus stations, hospitals, factories, shopping malls and other public places, but there are no vending machines for selling oxygen and fresh air on the market, because the storage of oxygen and air is in It is carried out in a high-pressure sealed state. Due to the high flow rate during the deflation process, the flowmeter commonly used to measure the flow rate cannot effectively calculate the inflated volume. The traditional method is generally obtained by weighing. To realiz...

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Problems solved by technology

[0002] Vending machine is a kind of equipment to realize the autonomy and automatic transaction of goods. It has existed in the market for a long time. It is divided into food machine, beverage machine, daily necessities, etc., and it is widely used in relevant countries. Mainly distributed in crowded areas, such as railway stations, bus stations, hospitals, factories, shopping malls and other public places, but there are no vending machines for selling oxygen and fresh air on the market, because the storage of oxygen and air is in It is carried out in a high-pressure sealed state. Due to the high flow rate during the deflation process, the flowmeter commonly used to measure the flow rate cannot effectively calculate the inflated volume. The traditional method is generally obtained by weighing. To realize the automatic gas sales The first thing to be solved for the feasibility of the freighter is the problem of automatic weighing. For this, we have launched a vending machine for automatic gas vending

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