Differential pressure type flow sensor accumulated water processing device and breathing machine with same

Abstract

The invention discloses a differential pressure type flow sensor accumulated water processing device and a breathing machine with the same. The accumulated water processing device comprises a metal valve, a differential pressure type flow sensor used for measuring gas flow in the metal valve, and a heating device for heating the metal valve and the differential pressure type flow sensor. By being heated, the metal valve and the differential pressure type flow sensor can maintain consistent in temperature, and it is guaranteed that steam in the metal valve and the differential pressure type flow sensor can not be condensed in a sampling channel due to temperature changes to influence detection precision of the differential pressure type flow sensor. Due to the fact that the heating device can control the heating temperature, an independent temperature detection device for detecting the temperature of the valve is not needed, the metal vale is an integrated metal component and good in heat conducting effect, and temperature uniformity can be effectively guaranteed. When the differential pressure type flow sensor is tightly attached to a flat surface, the metal valve and the differential pressure type flow sensor can be heated only through one heating device, and the temperature is convenient to control.

Description

Technical field [0001] The invention relates to a pressure detection device at the expiration end of a ventilator, in particular to a pressure difference type flow sensor water treatment device and a ventilator with the device. Background technique [0002] A ventilator is a device that can replace, control or change people’s normal physiological breathing, increase lung ventilation, improve respiratory function, reduce respiratory work consumption, and save heart reserve capacity. Therefore, ventilator has become indispensable in clinical treatment. The lack of equipment; it is widely used in the fields of emergency, anesthesia, ICU and respiratory therapy; [0003] For patients undergoing treatment, the size control of ventilation is very important, especially for infants and young children and critically ill patients, which not only requires precise control of flow, but also a sensitive response to airway pressure. That is, when the system reaches the upper limit of the set pre...

AI Technical Summary

Problems solved by technology

Ultrasonic sensors are more expensive, and differential pressure flow sensors are cheaper, but because there is a small air flow through the bypass channel, if the sampled gas contains water vapor, it is likely to condense in the sampling channel, which will affect its accuracy Very large and can cause inaccurate or undetectable signals

In fact, most sensors are far away from the exhalation valve at a certain distance, and the temperature is lower than that of the exhalation valve body. When the gas reaches the sensor, the temperature drop will still cause water vapor condensation.

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