Expiratory valve for respirator

Abstract

The invention discloses an expiratory vale for a respirator, comprising a valve body which is provided with a valve cavity, an air admission valve port and an air outlet valve port; the air outlet valve port is provided with a valve cover which is internally provided with a membrane; and the valve cavity is internally provided with an air flow sensor. The valve cavity is internally provided with a fluid director which is positioned in the valve cavity between the air admission valve port and the air flow sensor. The valve body is provided with a sensor installation hole which is communicated with the valve cavity. In the proposal, as the valve cavity is internally provided with the air flow sensor, the expiratory valve not only has the uni-directional ventilation function, but also has the expiratory volume measuring function, thus simplifying the structure of the respirator, and lowering the manufacturing cost of the respirator. In addition, the arrangement of the fluid director improves the accuracy of the measurement of the expiratory volume; the arrangement of the installation hole realizes the detachable connection mode of the air flow sensor, and when the valve cavity is cleaned and disinfected, the air flow sensor can be moved out through the installation hole first, thus causing the use and maintenance of the respirator to be convenient.

Description

Technical field

[0001] The invention relates to a component of a respirator, more specifically an exhalation valve of a respirator, and belongs to the technical field of medical equipment. Background technique

[0002] The respirator is an indispensable equipment for the rescue of critically ill patients. It is often used for rescue of respiratory arrest or respiratory failure caused by various causes and respiratory management during anesthesia. It is a device that maintains and assists the patient's breathing by a mechanical method. Existing respirators can be divided into negative pressure respirators and positive pressure respirators. The negative pressure respirator uses a machine to expand the chest to make the chest become negative pressure, so that the air mixed with oxygen can automatically flow into the lungs. Its advantage is that it is more in line with natural physiology and does not require intubation, but it cannot accurately and effectively control the gas volume....

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