Molecular sieve gas circuit control device and oxygenerator

Abstract

The invention discloses a molecular sieve gas circuit control device. The molecular sieve gas circuit control device comprises an end cover, a gas circuit body and a control valve assembly, and the end cover is provided with an air inlet joint which is connected with a high-pressure air source, the end cover is connected with the gas circuit body in a sealing manner, the control valve assembly isarranged in the gas circuit body, a gas inlet cavity and a gas exhaust cavity are formed in the gas circuit body, the gas inlet cavity communicates with the gas inlet connector and the molecular sievetower, the gas exhaust cavity communicates with the gas exhaust hole and the molecular sieve tower, and the control valve assembly controls opening and closing of the gas inlet cavity and the gas exhaust cavity. The invention discloses a molecular sieve gas circuit control device. Two silencing cavities are formed through the air inlet cavity and the air outlet cavity of the end cover and the airchannel body, instability of airflow is eliminated, air inlet noise and air outlet noise are effectively eliminated, all components are integrated through the air channel body, external connectors are not needed, the number of the connectors is effectively reduced, the air leakage risk is reduced, and maintenance is easy. Meanwhile, the gas circuit structure is good in packaging performance and compact in structure.

Description

technical field [0001] The invention belongs to the technical field of oxygen making equipment, and in particular relates to a molecular sieve gas circuit control device and an oxygen making machine. Background technique [0002] The molecular sieve oxygen generator adopts the working principle of pressure swing adsorption to separate more than 90% of oxygen from the air. It only needs electricity and no other consumables. The technology is becoming more and more mature, and it is widely used in industrial or hospital and family oxygen supply. Oxygen therapy, as an important medical method, is used to correct hypoxemia, relieve dyspnea and other cardiopulmonary symptoms, with remarkable effects and a long history of application. With the continuous popularization of small household molecular sieve oxygen generators, household oxygen therapy has been widely used. International standards and national standards related to small household molecular sieve oxygen generators have ...

AI Technical Summary

Problems solved by technology

[0003] At present, the following problems are common in small household molecular sieve oxygen generators: 1. The oxygen production process is relatively complicated, the gas circuit control structure is complex, the pipeline connections are many, the solenoid valves are used more, there are many parts, and the space is tight, so it is difficult to layout, modularization and standardization Low degree, difficult maintenance, high failure rate, complicated installation process, low production efficiency and high production cost

2. Due to the complexity of the gas circuit control, the noise generated during the alternating reciprocation of the solenoid valve and the molecular sieve tower is the main source of the noise of the whole machine, and noise control has also become a problem that is difficult to effectively control

[0007] In the schemes of the above two documents, the molecular sieve gas path control device is composed of a molecular sieve tower, a separate bypass solenoid valve, a four-position six-way valve, an intake and exhaust conduit, and an exhaust muffler. They have the following problems: 1. The four-position six-way valve is generally small in size, with a built-in small flow channel structure for gas flow, and the intersection node is generally narrow. When the valve is opened and closed, the high-pressure air flow passes through, which will produce a large gas circuit explosion, and the original noise is large , and the noise propagates along the valve body, pipeline, molecular sieve tower, etc., because the source has internal structural limitations, making noise control difficult and ineffective;

[0008] 2. Using the design of the cover plate cavity, there are many components, low integration, many gas channels, and many joints, the risk of air leakage is high, the number of fault points is increased, the maintainability is poor, and the difficulty of overhaul is increased; 3. Due to noise factors, Affect the patient's experience and reduce the patient's compliance with oxygen therapy

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