Variable-ventilatory-capacity sine gas supply device and high-simulation-degree HME moisture loss tester

Abstract

The invention discloses a gas supply device and a high-simulation-degree HME moisture loss tester and belongs to the technical field of heat and moisture exchanger performance testing. The gas supply device structurally comprises a crank, a slider and a cylinder. The crank is fixedly connected with a driving rotary shaft. A long-strip-shaped slide way is formed in the portion, on one side of the driving rotary shaft, on the crank, the slider is installed in the slide way, and the slider can move along the slide way and can be positioned in the slide way. One end of the cylinder extends out of a piston rod, and the other end of the cylinder is provided with a gas flow conveying pipe communicated with the inside of the cylinder. The tail end of the piston rod is connected to the slider in a rotary mode. A supporting table is arranged under the tester, and the gas supply device is installed on one side of the supporting table. The gas supply device can generate standard sine wave gas flow, the respiration condition of a patient is truly simulated, and the simulation degree of an HME is improved.

Description

technical field [0001] The invention relates to the technical field of performance testing of heat and moisture exchangers, in particular to a sinusoidal air supply device with variable air flow and a high-fidelity HME moisture loss tester. 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 inhalation process. Therefore, its moisturizing performance is a very...

AI Technical Summary

Problems solved by technology

[0007] 1. There is a dead point in the transmission process of the crank rocker mechanism, which leads to poor reliability of its work;

[0008] 2. In the above-mentioned patents, the rocker of the crank-rocker mechanism can only generate airflow with a fixed ventilation volume, which has poor versatility. When the ventilation volume needs to be changed, a different air supply device needs to be replaced, which is very inconvenient to use

[0009] In addition, it is also found that there is a large deviation between the test results of the current HME moisture loss tester and the actual results when it is put into use. In order to reduce the above deviation as much as possible, 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, let the air exhaled and inhaled by the simulated patient pass through the heated water bath, and the temperature of the heated water bath is kept at about 37°C to simulate the human body environment as much as possible. However, the above deviation Once zoomed out to a certain point, it cannot be zoomed out any further

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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