VPSA (Vacuum Pressure Swing Adsorption) oxygen generator module based on intelligent pressure control, and oxygen generation method of module

Abstract

A VPSA (Vacuum Pressure Swing Adsorption) oxygen generation module based on intelligent pressure control comprises a first adsorption tower, a second adsorption tower, a vacuum pump and an oxygen storage tank, wherein the air inlet and exhaust ends of the first adsorption tower and second adsorption tower are communicated with an air inlet of an oxygen generator respectively through a first control valve and a third control valve and are simultaneously communicated with a nitrogen discharging hole of the oxygen generator respectively through a second control valve and a fourth control valve; the nitrogen discharging hole is connected with the vacuum pump; the oxygen outlet ends of the first adsorption tower and second adsorption tower are communicated with the oxygen storage tank respectively through a fifth control valve and a sixth control valve; the oxygen storage tank is connected with an oxygen outlet of the oxygen generator; a seventh control valve is arranged between a connecting pipeline of the first adsorption tower and the fifth control valve and a connecting pipeline of the second adsorption tower and the sixth control valve; and the VPSA oxygen generation module also comprises a first pressure difference sensor, a second pressure difference sensor, a third pressure difference sensor and a fourth pressure difference sensor. The invention further provides an oxygen generation method of the VPSA oxygen generation module. According to the VPSA oxygen generation module and the oxygen generation method, the oxygen generation efficiency of a small domestic medical oxygen generator is improved, and an applicable scene is more flexible.

Description

technical field [0001] The invention relates to the field of small household medical oxygen generators, in particular to a VPSA oxygen generator module based on intelligent pressure control and an oxygen generator method thereof. Background technique [0002] When the oxygen generator is working, it is necessary to ensure that the gas pressure inside the adsorption tower reaches the ideal working pressure before it can fully exert the function of the molecular sieve, so that the machine can run in an ideal state. If the air pressure in the adsorption tower is high or low, it will affect the efficiency of oxygen production and cause the quality of product gas to decline. At present, the small household medical oxygen concentrators in the domestic market control the switching of the solenoid valve based on time, and then control the gas pressure in the adsorption tower. [0003] Its structure of existing small household medical oxygen concentrator is as follows: figure 1 As ...

AI Technical Summary

Problems solved by technology

However, in high-altitude areas, the air is relatively thin. If it is still controlled at the same time, it will be difficult to achieve the expected gas pressure in the adsorption tower, which will cause the oxygen generator to fail to reach the optimal working state.

[0007] Moreover, after long-term use of the oxygen generator, each component is aging (such as compressor, molecular sieve), and the operating efficiency of the component will be lower than that of the new machine component.

Therefore, even in low-altitude areas, after long-term use of the oxygen generator, within the same control time, the inside of the adsorption tower may not reach the target gas pressure, resulting in poor use effect

[0008] Oxygen generators in large-scale industrial applications have many control structures and control methods, but the structures in large-scale industrial applications are more complicated and the cost is higher, so they cannot be used in small oxygen generators in the household medical field.

Moreover, the use environment of oxygen generators for large-scale industrial applications is usually fixed, and they do not have the ability to adapt to different use environments.

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