High-accuracy heat and moisture exchanger moisture loss tester and working method thereof

Abstract

The invention discloses a high-accuracy heat and moisture exchanger moisture loss tester and a working method thereof and belongs to the heat and moisture exchanger performance test technology field. The structure comprises an enclosed water storage container. An internal portion of the water storage container is provided with an expiration pipeline and a suction pipeline. The expiration pipeline is connected to an air bag simulating a human lung. The suction pipeline is connected to a heat and moisture exchanger. The water storage container is connected to an expiration outlet and a suction outlet respectively. The expiration outlet is connected to the heat and moisture exchanger. The suction outlet is connected to the air bag. The internal portion of the water storage container is provided with an automatic water supplementing apparatus. During usage, the automatic water supplementing apparatus carries out automatic water supplementing so as to maintain stabilization of a water surface height in the water storage container. In the invention, the water level height in the water storage container can be maintained to be stable so that air inlet pressure of the heat and moisture exchanger can be maintained to be stable and test accuracy can be greatly increased.

Description

technical field [0001] The invention relates to the technical field of heat-humidity exchanger performance testing, in particular to a high-precision heat-humidity exchanger moisture loss tester and its working method, which are suitable for testing the moisture retention of the heat-humidity exchanger. Background technique [0002] A heat and moisture exchanger (HME for short) is a device for humidifying human breathing gas. General medical gases lack sufficient moisture and are difficult to adapt to the physiological needs of the patient's respiratory tract. The heat and moisture exchanger is used to increase the humidity of the gas delivered to the respiratory tract. Moisture content and temperature, they are primarily intended for standalone use or as part of a respiratory system. [0003] The working principle of the heat and moisture exchanger is to retain part of the moisture and heat in the patient's exhalation, and return it to the respiratory tract during the inhal...

AI Technical Summary

Problems solved by technology

[0005] Above-mentioned test method can more accurately reflect the moisturizing ability of HME, yet, there is the shortcoming of poor precision in existing HME moisture loss tester, there is bigger deviation between its test result and the use result when actually putting into use, in order to Minimize the above-mentioned deviation as much as possible, and those skilled in the art have done a lot of research and improvement work, make the test process simulate the real patient's breathing process to the greatest extent, for example, make the air that simulates the patient exhale and inhale the gas pass through the heated water bath, heat the The temperature of the water bath is constant at around 37°C, simulating the environment of the human body as much as possible. However, after the above-mentioned deviation is reduced to a certain extent, it cannot be further reduced

This deviation can only be treated as a reasonable error, resulting in poor accuracy of the HME water loss tester and poor clinical reference

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