A portable ventilator

Abstract

A portable ventilator, comprising a housing, the housing is provided with a fan box (101), a shut-off device (108) and a control device (113), the fan (8) is installed in the fan box (101) through a noise reduction device, and the fan box (101) The air outlet of the air outlet is connected to the internal breathing tube (107), and the internal breathing tube (107) is provided with a shut-off device (108), and the air outlet of the shut-off device (108) is connected to the breathing tube (104) and the face mask (105), noise reduction The device comprises that the flexible lower cover (3) and the flexible upper cover (5) cooperate to form a closed cavity for accommodating the fan (8), and the fan (8) is suspended on the flexible hanging column (6). On the cover (5); the noise reduction device is integrally formed with a snake-shaped closed air passage (3‑1) and a fan inlet air passage (3‑2) connected in sequence. The integrated noise reduction device and the airway structure work together to make the working noise of the ventilator lower than 15 decibels, which is convenient for accurate detection of breathing gas parameters and can achieve 360° anti-backflow.

Description

technical field [0001] The invention relates to the field of ventilators, in particular to a portable ventilator. Background technique [0002] Home sleep ventilators are mainly used in individual families, sleep centers and small clinics, mainly for patients with apnea syndrome. The ventilator relies on the fan to pressurize the gas in the pipeline. During the working process, the fan will inevitably make noise. Because the patient's tolerance threshold for sound is lowered, and the single and repeated stimulation of these sounds to the patient makes the patient unable to distinguish between Day and night, so the adverse stimulation of the ventilator noise to the patient is great. How to control the noise to a minimum and not affect the sleep of patients is a major issue that every ventilator manufacturer must face. [0003] Fan noise is mainly divided into two types, one is the whistling sound caused by the rapid rotation of the fan and the friction between the blades an...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, there are mainly three types of control for fan noise: 1. Wrap the fan in a thick box with sound-proof material, usually EVA material, but this requires higher sound-proof material, and the volume of the box generally requires Large size is not conducive to cost control and volume control of the ventilator. Because home ventilators are mainly used in homes and sleep centers, they are generally not made too large for convenience.

2. Create a soundproof environment through the gas path structure. This method is low in cost, but it has extremely high structural requirements and is generally difficult to achieve

3. Increase the number of rigid connection parts to fix the fan by adding special protection treatment, reduce the vibration of the fan and reduce the noise, but this solution also has the problems of increased volume and increased cost

The air blown out by the fan is not a stable airflow, and usually has a large disturbance. If the airflow blown by the fan is directly collected, the obtained data will not be stable, which will have a great impact on the algorithms in the software. At the same time, it will also make the patient feel unwell

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