Air-oxygen mixing structure for breathing machine and breathing machine

Abstract

The invention provides an air-oxygen mixing structure for a breathing machine and the breathing machine. The air-oxygen mixing structure comprises an air flow detecting cavity, an oxygen guide cavity, an air guide cavity and a mixing cavity. The inlet end of the air flow detecting cavity is an air inlet, and the outlet end of the air flow detecting cavity is communicated with the inlet end of the air guide cavity. A pressure-drop holed wall is arranged in the air flow detecting cavity, and a flow detecting port I and a flow detecting port II are respectively arranged on the front side and the rear side of the pressure-drop holed wall. The air guide cavity is a circular-ring-shaped cavity arranged on the periphery of the air guide cavity, and an oxygen inlet is formed in the outer wall of the oxygen guide cavity. The inlet end of an oxygen mixing guide cavity and the inlet end of an air mixing guide cavity are respectively communicated with the oxygen guide cavity and the air guide cavity, and the outlet ends of the two cavities are both communicated to the mixing cavity. The outlet end of the mixing cavity is provided with a mixing holed wall. The air-oxygen mixing structure is used for the breathing machine and has the advantages of being simple in structure, capable of preventing turbulent flows from influencing flow detection and making gases be mixed fully.

Description

technical field [0001] The invention relates to an air-oxygen mixing structure for a ventilator and the ventilator, belonging to the technical field of ventilators. Background technique [0002] In modern clinical medicine, the ventilator, as an effective means of artificially replacing the spontaneous ventilation function, has been widely used in respiratory failure caused by various reasons, anesthesia respiratory management during major surgery, respiratory support treatment and emergency resuscitation. It occupies a very important position in the field of modern medicine. Ventilator is a vital medical equipment that can prevent and treat respiratory failure, reduce complications, save and prolong the life of patients. [0003] During the use of the ventilator, the patient must be mechanically ventilated. For the patient being treated, the control of the ventilation volume and the adjustment of the oxygen concentration are very important, especially for infant patients a...

AI Technical Summary

Problems solved by technology

However, the flow detection port on the rear side of the pressure drop perforated wall of this structure in the prior art is located in the mixing chamber, and the air flow entering from the air inlet and the oxygen flow entering from the oxygen inlet are likely to form a turbulent flow at the flow detection port, resulting in The pressure at the back-end flow detection port is very unstable, which makes the detection inaccurate

Moreover, the gas of this structure also has the problem of insufficient gas mixing

[0004] In order to solve the problems of inaccurate detection and uneven mixing of air and oxygen, the following air and oxygen mixing mechanisms or devices for ventilators are disclosed in the prior art:

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