A Rotary Valve for Large Oxygen Concentrator

Abstract

The invention discloses a rotary valve for a large oxygenerator. The rotary valve comprises a stationary sheet, a movable sheet, springs and a transmission sheet which are assembled on a motor shaft. A silencing hood covers the outer side; a proximity switch is fixedly arranged on the side face of the silencing hood; an iron sheet is correspondingly arranged on the movable sheet; an air inlet hole, an air inlet control hole A, an air inlet control hole B, an exhaust control hole A, an exhaust control hole B and two balancing control holes are formed in the stationary sheet, wherein openings at one ends communicate with the upper surface of the stationary sheet; an air inlet channel, an exhaust channel and a balancing channel which are connected one another are arranged on the movable sheet; the balancing channel communicates with an air inlet groove; the air inlet hole communicates in the air inlet groove; the air inlet channel, the exhaust channel and the balancing channel are arranged when the movable sheet rotates to different positions, so that when the air inlet control hole A / the air inlet control hole B is connected to the air inlet channel, only the exhaust control hole B / the exhaust control hole A is connected to the exhaust channel, and when the air inlet control hole A and the air inlet control hole B are connected to the air inlet channel at the same time, only one of the balancing control holes is connected to the balancing channel.

Description

technical field [0001] The invention relates to a rotary valve for oxygen-generating equipment, which is mainly used for gas circuit control of the oxygen-generating equipment. Background technique [0002] The existing widely used PSA oxygen generator includes two adsorption towers A and B, and the two adsorption towers work alternately. In order for the oxygen generator to realize the alternate work of the adsorption tower, the control valve must be used to complete the commutation of compressed air and the desorption and discharge of nitrogen. At present, the commonly used control valves for oxygen generators mainly include solenoid valves and rotary valves. Among them, the solenoid valve adopts a diaphragm type solenoid valve. This type of solenoid valve adopts an upper and lower double diaphragm structure. The diaphragms are connected by a valve stem to form an interaction. The sealing between the valves and the switching of the main valve are realized by the upper an...

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Problems solved by technology

However, the coil of this kind of solenoid valve will make a sound when it is alternately switched on and off, and it will produce regular noise when it is applied to an oxygen generator; the rotary valve is generally composed of a stepping motor, a rotating disc and a stationary disc, and the rotary valve does not have The noise generated by the alternating energization of the electromagnetic coil can realize simultaneous control of multiple pipelines, but the existing rotary valve is only suitable for 1L household oxygen generators, and cannot be applied to large oxygen generators, and the existing rotary valves It is impossible to count the number of rotations of the rotary valve, and it is also impossible to judge whether the motor is damaged

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