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Air conditioner pipeline low-frequency noise source identification method and system

A low-frequency noise and sound source identification technology, which is applied to radio wave measurement systems, instruments, design optimization/simulation, etc., can solve problems such as the inability to accurately identify the location of low-frequency noise sound sources in pipelines, and achieve the effect of improving accuracy

Active Publication Date: 2020-09-11
四川长虹空调有限公司
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method and system for identifying low-frequency noise sources of air-conditioning pipelines, which can solve the problem that a single structure field simulation cannot accurately identify the location of low-frequency noise sources in pipelines, and at the same time greatly improve the accuracy of low-frequency noise source identification Accuracy

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  • Air conditioner pipeline low-frequency noise source identification method and system
  • Air conditioner pipeline low-frequency noise source identification method and system
  • Air conditioner pipeline low-frequency noise source identification method and system

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Embodiment Construction

[0030] The method for identifying the sound source of the low-frequency noise of the air-conditioning pipeline of the present invention, the flow chart of the method is as follows figure 1 , including the following steps:

[0031] Step 101: Calculate the rotational moment of inertia of the compressor;

[0032] Step 102: Perform FFT transformation on the rotational moment of inertia of the compressor to obtain the amplitude of the rotational moment of inertia of the compressor at each frequency point;

[0033] Step 103: generating a fluid-structure interaction finite element model of the compressor piping system;

[0034] Step 104: Load the amplitude of the rotational inertia moment at each frequency point to the fluid-structure interaction finite element model of the compressor piping system to obtain the frequency response curve of each piping;

[0035] Step 105: Identify the location of the low-frequency noise source according to the frequency response curves of each pipel...

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Abstract

The invention relates to the field of air conditioners, in particular to an air conditioner pipeline low-frequency noise source recognition method. The problem that the position of a low-frequency noise source of a pipeline cannot be accurately recognized through single structural field simulation can be solved, and meanwhile the accuracy of low-frequency noise source recognition is greatly improved. The method comprises the steps of calculating compressor rotational inertia moment, converting the compression rotation inertia moment; obtaining the amplitude of the rotational inertia moment ateach frequency point; generating a fluid-solid coupling finite element model of the compressor pipeline system; and loading the amplitude of the rotational inertia moment at each frequency point to afluid-solid coupling finite element model of the compressor pipeline system, calculating to obtain a frequency response curve of each section of pipeline in the compressor pipeline system, and comparing the amplitude of the frequency response curve of each section of pipeline to determine the position of the low-frequency noise source.

Description

technical field [0001] The invention relates to the field of air conditioners, in particular to a method and system for identifying low-frequency noise sources of air conditioner pipelines. Background technique [0002] Low-frequency noise has strong penetrability due to its long sound wave wavelength. Therefore, in the air-conditioning industry, the problem of low-frequency noise in the pipeline of air conditioners is a difficult point in the industry. The low-frequency noise of the pipeline of the air conditioner is mostly caused by the vibration of the pipeline. Therefore, the current solution to the low-frequency noise of the pipeline is to reduce the vibration of the pipeline. For example, adding shock absorbers or putty to the pipeline will increase the cost of the pipeline. [0003] At present, in order to solve the problem of low-frequency pipeline noise, the common practice is to predict the natural frequency and mode shape of the compressor pipeline system and the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G01S5/18G10L17/26G06F119/10
CPCG06F30/23G01S5/18G10L17/26G06F2119/10Y02T90/00
Inventor 李磊鑫李越峰董维邱名友
Owner 四川长虹空调有限公司
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