Low-noise air channel

Abstract

The invention provides a low-noise air channel. The low-noise air channel comprises an air channel box provided with an air outlet and at least two air inlet pipes arranged on the air channel box. Each air inlet pipe comprises a first straight pipe, a bent pipe and a second straight pipe, wherein the first straight pipe is fixed to the air channel box, the bent pipe is arranged in the air channel box, the inner wall of the bent pipe is smooth, the bent angle of the bent pipe is 75-105 degrees, the inlet end of the bent pipe is connected with the first straight pipe, the outlet end of the bent pipe is connected with the second straight pipe, the second straight pipe is arranged in the air channel box, and the center axis of the second straight pipe is parallel to the center axis of the air channel box. The low-noise air channel has the advantages of being low in noise, small in pressure loss, good in flow equalizing effect and the like.

Description

technical field [0001] The invention relates to an air duct, in particular to a low-noise air duct. Background technique [0002] Compared with turbulent air, laminar air has the advantages of anti-bacteria and dust removal, high heat dissipation efficiency, uniform and stable air volume, and low wind noise. Therefore, laminar air flow has been widely used, and the requirements for air duct design are getting higher and higher. [0003] In the existing design of small long air ducts, most of them achieve uniform air discharge by means of blocking flow or static pressure. This solution has many shortcomings, such as: [0004] 1. For some kind of air duct whose air inlet and outlet are perpendicular to the air duct and the air outlet is offset, due to the small space, it is generally difficult to implement the existing air duct design. The design has increased a lot of difficulty and added many limitations to the design scheme. [0005] 2. Since the position of the air outl...

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Problems solved by technology

[0004] 1. For some kind of air duct whose air inlet and outlet are perpendicular to the air duct and the air outlet is offset, due to the small space, it is generally difficult to implement the existing air duct design. The design adds a lot of difficulty and adds a lot of limitations to the design scheme

[0005] 2. Since the position of the air outlet is eccentric relative to the air duct box, the uniformity of the pressure distribution inside the box will be poor, resulting in a large difference in the flow rate of each air inlet of the air duct, which reduces the air intake uniformity of the air duct. sex

[0006] 3. The method of blocking flow or static pressure will greatly increase the wind resistance of the air duct. The fan that provides the power source needs a relatively large power to meet the pressure difference required to achieve the rated wind speed, and the energy loss is serious.

[0007] 4. In the existing air duct, the air inlets will generate airflows with different flow velocities and collide with each other. The collision between the high and low speed airflows will produce regular pulsation, which will produce a more obvious howling sound inside the air duct , so that the air duct noise is greatly improved

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