Exhalation valve and breathing machine with exhalation valve

Abstract

The invention provides an exhalation valve and a breathing machine with the exhalation valve. The breathing machine comprises a base, a valve body, a diaphragm, a driving device and a flat spiral spring; the base is connected to the valve body; the diaphragm is arranged between the base and the valve body, and the diaphragm and the valve body form a sealed chamber; the driving device comprises a moving shaft, the driving device is arranged in the base and is suitable for driving the diaphragm to do reciprocating motion along the axial direction of the moving shaft; and the flat spiral spring is arranged on the base and connected to the moving shaft. The diaphragm can be driven by the driving device to do reciprocating motion in the axial direction of the moving shaft, so that positive pressure waves and negative pressure waves are formed in the sealed chamber formed by the diaphragm and the valve body. Through the connection between the flat spiral spring and the moving shaft in the driving device, the situations of radial swing and the like of the moving shaft in the axial movement process can be effectively prevented, so that the precision and stability of the axial movement of the moving shaft are ensured, and the precision and stability of the reciprocating movement of the diaphragm are ensured.

Description

technical field [0001] The invention relates to the technical field of medical equipment, in particular to an exhalation valve and a ventilator with the same. Background technique [0002] The exhalation valve is the core component of the ventilator. It is often used to block or open the exhalation path, so as to realize the mutual switching between the inspiratory phase and the expiratory phase. The therapeutic effect plays a very important role. Among them, the electromagnetic exhalation valve uses the millisecond-level response speed of electromagnetic direct drive and the micron-level stroke control accuracy to achieve "highly sensitive and active" control, and is widely used in ventilators. However, in the prior art, during the reciprocating motion of the motion shaft driven by the principle of electromagnetic induction in the exhalation valve, it is usually easy to cause the motion shaft to swing along its radial direction, so it is difficult to ensure the accuracy of...

AI Technical Summary

Problems solved by technology

However, in the prior art, during the reciprocating motion of the motion shaft driven by the principle of electromagnetic induction in the exhalation valve, it is usually easy to cause the motion shaft to swing along its radial direction, so it is difficult to ensure the accuracy of the axial movement of the motion shaft and stability

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