Air-oxygen mixing airway for respirator, respirator and method

Abstract

Disclosed are an air-oxygen mixing airway for a respirator, the respirator and a method. The air-oxygen mixing airway comprises an anti-turbulence member and an air-oxygen mixing cavity, the anti-turbulence member comprises an oxygen way and an air way, two ends of the air way are open, the left end of the oxygen way is closed while the right end of the same is provided with an oxygen barrier piece, and an oxygen inlet is arranged on the outer side of the oxygen barrier piece. The respirator comprises an oxygen way, an air way and an air-oxygen mixing chamber provided with the air-oxygen mixing airway, an oxygen miniature proportional valve, an oxygen flow sensor and an air intercepting member are arranged on the oxygen way, a fan, an air pressure adjusting valve, an air flow sensor and an air intercepting member are arranged on the air way, and opening degree of the oxygen valve is adjusted to adjust oxygen flowing speed according to oxygen concentration of mixed gas needing to be output and air flowing speed measured by the air flow sensor. The anti-turbulence member is adopted in the air-oxygen mixing airway, and can cooperate with the flow sensors which are high in accuracy and low in power consumption, and the oxygen barrier piece is utilized, so that accuracy of air-oxygen mixed gas can be improved.

Description

technical field [0001] The invention relates to an air-oxygen mixed airway for a ventilator, a ventilator and a method, and belongs to the technical field of ventilators. Background technique [0002] A variety of respiratory diseases and patients with clinical hypoxia need to be treated with a ventilator and supplemented with oxygen therapy to correct hypoxia, increase arterial oxygen partial pressure and oxygen saturation levels, and promote metabolism. The ventilator delivers oxygen-enriched pressurized flow to the patient's airway according to the treatment plan, which is the most direct and effective way to solve the oxygen uptake of these patients. [0003] At present, pneumatic ventilators with air-oxygen mixing function (air sources are all pressurized sources, such as air storage tanks) or electric ventilators (air source is electric turbines) are connected with high-pressure oxygen sources, and through pressure reducing valves, The proportional valve is used to ad...

AI Technical Summary

Problems solved by technology

[0004] 1. Safety valve: At present, whether it is a pneumatic ventilator or an electric ventilator connected to a high-pressure oxygen source, the potential safety hazards brought by human misoperation to the patient are not considered. For example, when the oxygen source connection pressure exceeds the normal range, The high-pressure oxygen source will destroy the airtightness of the proportional valve, and the oxygen containing ultra-high pressure will directly act on the patient, directly endangering the life safety of the patient;

[0005] 2. The influence of the oxygen source on the adjustment of the oxygen concentration: the oxygen adjusted by the proportional valve is directly mixed with the air, and the oxygen flow rate will disturb the airway pressure, impact the air flow rate, cause a large air flow disturbance, and affect the accuracy of the oxygen concentration;

[0006] 3. Air-oxygen mixing structure: The current air-oxygen mixing structure does not have a mixing chamber. It only combines air and oxygen into the output airway and then mixes them in the front airway of the patient. This uneven mixing has a certain impact on the safety of oxygen inhalation for patients Impact

[0011] Both comparative document 1 and comparative document 2 disclose the improvement of the airway control device (valve) in the ventilator. The focus of comparative document 1 is to realize the miniaturization of the ventilator through the integration of various internal valve bodies; the comparative document 2 The key point is to ensure the accuracy of the ventilator and the safety of the user through the control of the safety valve; Reference 3 discloses an air-oxygen mixing mechanism, in which the opening of the exhaust port is mainly changed by the movement of the mandrel The development of the adjustment and control of the flow rate does not involve the improvement of the mixing chamber to solve the problem of uneven mixing of air-oxygen mixed gas

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