一种消声通道及呼吸机
By employing a U-shaped channel design and a noise reduction structure in the ventilator, and utilizing sound wave interference and a noise-reducing body, the problem of poor noise reduction effect in existing technologies has been solved, achieving a better noise reduction effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG BRAIN ENHANCE TECH CO LTD
- Filing Date
- 2025-08-11
- Publication Date
- 2026-07-17
AI Technical Summary
Existing ventilators have a single type of noise reduction structure and similar noise reduction effect, which cannot effectively reduce fan noise.
The design employs a U-shaped channel, which creates a path difference by setting first and second paths within the channel, and combines microporous plates and porous sound-absorbing materials, such as sponge sound-absorbing materials, to reduce noise by utilizing sound wave interference and sound-absorbing structures.
The types of noise reduction structures have been expanded, the noise reduction effect has been improved, and the fan noise has been effectively reduced.
Smart Images
Figure CN224506050U_ABST
Abstract
Claims
1. A noise reduction channel, characterized in that, It includes: The U-shaped channel has an air inlet and an air outlet; The air inlet and the air outlet form a first path and a second path, and there is a path difference between the first path and the second path, so that the sound waves in the first path and the sound waves in the second path interfere when they converge.
2. The sound attenuation passage of claim 1, wherein The air inlet includes a first air inlet and a second air inlet, which are side by side; The first air inlet is close to the first path and far from the second path, and the second air inlet is close to the second path and far from the first path; The air outlet includes a first air outlet and a second air outlet, which are side by side; The first air outlet is close to the first path and far from the second path, and the second air outlet is close to the second path and far from the first path.
3. The sound attenuation passage according to any one of claims 1 to 2, characterized in that The U-shaped channel is equipped with a first noise-absorbing structure.
4. The sound attenuation passage of claim 3, wherein The first noise reduction structure includes a microporous plate and / or a porous noise reduction body, wherein the porous noise reduction body includes a sponge noise reduction body.
5. The sound attenuation passage according to any one of claims 1 to 2, characterized in that, The ring hole of the U-shaped channel is provided with a second noise-absorbing structure.
6. The sound attenuation passage of claim 5, wherein, The second noise reduction structure includes a microporous plate and / or a porous noise reduction body, wherein the porous noise reduction body includes a sponge noise reduction body.
7. The sound attenuation passage of claim 5, wherein, A sound-absorbing chamber is formed above the U-shaped channel, and the air outlet is connected to the sound-absorbing chamber; The anechoic chamber contains a sound source, which is located at the position corresponding to the second anechoic structure.
8. The sound attenuation passage of claim 7, wherein, The sound source is a fan; The second noise reduction structure includes: The first microperforated plate faces the fan. The second microplate faces the first microplate.
9. The sound attenuation passage of claim 8, wherein, The first microperforated plate has a concave surface facing the fan.
10. A breathing machine characterized by, It includes the silencing channel as described in any one of claims 1 to 9.