Vehicle-mounted oxygen supply apparatus

Abstract

The invention specifically relates to a vehicle-mounted oxygen supply apparatus which comprises a main control panel, wherein the input end of the main control panel is connected with a DC power supply, the output end of the main control panel is connected with a three-phase AC asynchronous air compressor and an electromagnetic valve, the air inlet of the three-phase AC asynchronous air compressor is connected with an air inlet filter, the air outlet of the three-phase AC asynchronous air compressor is connected with the air inlet of the electromagnetic valve, the output end and air outlet ofthe electromagnetic valve are connected by an air passage, the electromagnetic valve is also in bidirectional connection with a molecular sieve by an air passage, and the output end of the molecular sieve is connected with an oxygen storage tank by an air passage. By using the DC power supply to supply power and using the main control panel to control and output three-phase AC to drive the low-voltage three-phase AC asynchronous air compressor to work so as to provide stable compressed air to an oxygen-producing part, the vehicle-mounted oxygen supply apparatus of the invention has the advantages of high driving efficiency, good electromagnetic compatibility, low noise and low noise, can work in a wide temperature range, especially can still work at a low temperature below minus 40 DEG C.

Description

technical field [0001] The invention belongs to the technical field of oxygen production, and in particular relates to a vehicle-mounted oxygen supply device. Background technique [0002] The principle of molecular sieve adsorption and separation to prepare oxygen is widely used in the industry. The method is to first generate compressed air with a compressor and then input the compressed air into the molecular sieve. The molecular sieve adsorbs nitrogen, etc., and the oxygen molecules directly enter the oxygen gas storage tank through the molecular sieve. . In the traditional vehicle-mounted oxygen supply device, the DC voltage is generally converted into 220V single-phase AC with a frequency of 50Hz through an inverter, and the single-phase AC air compressor is driven to work, or the DC 24V voltage is converted into a three-phase square wave, which drives the Brushless DC air compressors work. The driving efficiency of the former method is poor, because the capacitor is...

AI Technical Summary

Problems solved by technology

The driving efficiency of the former method is poor, because it needs to use capacitor phase shifting, the capacitor capacity becomes smaller and the impedance becomes larger at low temperature, so it is difficult to start the compressor at low temperature, especially at low temperature below -40°C, and electromagnetic interference Relatively large; the cost of the latter method is relatively high, and the electromagnetic interference and noise are relatively large

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