A Flow-Measurable Fan Muffler

Abstract

The invention belongs to the related technical field of fan silencing equipment, and discloses a fan silencer capable of measuring flow. The fan silencer comprises a housing and two pressure measuringconnecting tubes, and further comprises a sound absorbing material, wherein the housing forms an accommodating cavity; an air flue is arranged in the accommodating cavity; the sound absorbing material is filled between the air flue and the housing; at least one first pressure measuring point and at least one second pressure measuring point are arranged on the air flue; the first pressure measuring point and the second pressure measuring point are arranged in a spaced mode; the two pressure measuring connecting tubes are separately arranged on the housing, and separately communicate with the first pressure measuring point and the second pressure measuring point, so that pressure at two points of the air flue is detected, and therefore, flow of the fan is obtained according to the detectedpressure. The silencer can organically integrate a silencing function and a flow measuring function, is simple in structure, is small in pressure loss, and is good in noise reduction effect.

Description

technical field [0001] The invention belongs to the related technical field of fan muffler equipment, and more specifically relates to a fan muffler capable of measuring flow. Background technique [0002] The muffler refers to the air duct with noise transmission, which can use noise reduction devices such as pipes and elbows with sound-absorbing linings or pipes that use cross-sectional area changes and other pipes with discontinuous acoustic impedance, so that the noise in the pipes can be attenuated or reflected back. , the former becomes a resistive muffler, and the latter becomes a resistive muffler. The resistive muffler mainly eliminates medium and high frequency noise, and the resistive muffler mainly eliminates low frequency or medium and low frequency noise. If only one of the noise reduction principles is used, the result is that the range of noise that can be eliminated is narrow. [0003] At present, those skilled in the art have done some research. For examp...

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Problems solved by technology

If only one of the noise reduction principles is used, the result is that the range of noise that can be eliminated is narrow

[0003] At present, those skilled in the art have done some research. For example, the patent CN 202117739U discloses an impedance composite noise reduction structure. The noise reduction effect of the impedance composite noise reduction structure is better, but its effect is limited to noise reduction.

However, in practical applications, it is often necessary to measure the flow of the fan, but the flow measurement requires a long straight pipe section, and the general site conditions are difficult to meet

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