Noise detection method for range hood

Abstract

The invention discloses a noise detection method for a range hood. The noise detection method comprises the following steps: step 1, acquiring air performance data of the range hood and drawing an air volume-static pressure curve and an air volume-power curve; step 2,mounting the range hood and noise testing equipment located at a testing point, mounting a smoke tube of the range hood, and mounting an air volume adjusting valve on the smoke tube, wherein according to the air volume-power corresponding relation of the range hood, the motor power of the range hood is adjusted by adjusting the valve opening degree of an air volume adjusting valve, and after the power points of the range hood are controlled to be in one-to-one correspondence with the power points on the air volume-power curve, the working noises of the range hood are measured; and step 3, drawing working noise-power, working noise-air volume and working noise-static pressure curves according to the working noise data obtained through testing. All working states of the range hood are covered, so that noise data better fits the actual experience of a user, and the development work is better guided.

Description

Technical field [0001] The present invention relates to the technical field of suction hood, and more particularly to a method of absorbing hood noise detection. Background technique [0002] In the prior art, the test method of the working noise of the suction hood is: the intersection of the fitted smoke resistance curve and the absorbing hood PQ curve (power-air volume) is the hood work point, and is based on this work point design tobacco machine. The outer dimensions of the connected tobacco pipes and fixed ducts. However, the fitted exhaust resistance curve is a simple secondary curve, and it cannot reflect the resistance of different hoods and different work points, and if the size of the tobacco pipe and the fixed duct is determined, it can only test the hood Work noise under this work point. [0003] However, when installing the oil-proof hood, the actual use environment is mainly divided into a low-level building without public flue and a high-rise residence with public...

AI Technical Summary

Problems solved by technology

[0005] Therefore, the existing test methods cannot reflect the real experience of users under different working points

[0006] In addition, when measuring the noise of different working points at present, it can only be operated by the measurement method provided by the national standard GBT17713-2011, that is, the air volume test device is connected at the end of the smoke pipe, and the change of air volume and static pressure is controlled by replacing the orifice plate

Using the national standard air volume equipment to control the air volume of the range hood is feasible, but it is troublesome to replace the orifice plate of the air volume equipment and will take up a large space and affect the noise level of the range hood itself

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