Thermal expansion and cold shrinkage abnormal sound testing method of air conditioner indoor unit

An air-conditioning indoor unit, thermal expansion and contraction technology, applied in heating methods, space heating and ventilation, mechanical equipment and other directions, can solve problems such as inaccuracy, unfavorable air conditioning improvement and optimization, and achieve high accuracy and objective reference. Effect

Active Publication Date: 2021-06-22
四川长虹空调有限公司
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AI Technical Summary

Problems solved by technology

At present, there is no objective test method to judge the abnormal sound of thermal expansion and contraction of the indoor unit of the air conditioner. Generally, the abnormal sound of thermal expansion and contraction is heard by the human ear, which is relatively subjective and not accurate enough, which is not conducive to the detection of Air conditioning improved and optimized

Method used

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  • Thermal expansion and cold shrinkage abnormal sound testing method of air conditioner indoor unit
  • Thermal expansion and cold shrinkage abnormal sound testing method of air conditioner indoor unit
  • Thermal expansion and cold shrinkage abnormal sound testing method of air conditioner indoor unit

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Embodiment

[0045] The thermal expansion and contraction abnormal sound test for an air conditioner indoor unit 2 includes the following steps:

[0046] Step 1. Select a semi-anechoic room with a background noise not higher than 20dB(A) as the test room. The semi-anechoic room includes an indoor noise room and an outdoor noise room. The indoor noise room is equipped with an indoor working condition for adjusting the internal environmental conditions. Equipment, outdoor noise indoors are equipped with outdoor working equipment for adjusting the internal environmental conditions; indoor working equipment includes indoor 7.5P refrigerators and indoor 24KW electric heating devices;

[0047] Step 2: Install the air conditioner indoor unit 2 to be tested inside the indoor noise chamber, install the air conditioner outdoor unit 3 matching the air conditioner indoor unit 2 inside the outdoor noise chamber, and connect the air conditioner indoor unit 2 and the air conditioner outdoor unit 3 ,Such ...

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Abstract

The invention belongs to the technical field of air conditioner testing, and particularly discloses a method capable of accurately testing the thermal expansion and cold shrinkage abnormal sound condition of an air conditioner indoor unit. According to the testing method, the tested air conditioner indoor unit is installed in a testing room and connected with an external air conditioner outdoor unit, a pickup is arranged at a proper position, after an air conditioner is started to enable the operation state of the air conditioner to be consistent, the air conditioner indoor unit stands by simulating the actual use environment of the air conditioner indoor unit, then the environment temperature is improved, the air conditioner indoor unit is controlled to operate in a low-air heating manner to carry out thermal expansion noise testing, then the air conditioner indoor unit is turned off, meanwhile, the environment temperature is reduced to carry out cold shrinkage noise testing, a thermal expansion noise curve and a cold shrinkage noise curve are drawn according to noise data acquired by the pickup after testing is completed, and finally noise sharp points of the two noise curves which are 2-4 dB (A) higher than respective background noise curves are counted; and the thermal expansion and cold shrinkage abnormal sound condition of the air conditioner indoor unit can be effectively detected, and the accuracy of a testing result is high.

Description

technical field [0001] The invention belongs to the technical field of air conditioner testing, and in particular relates to a method for testing abnormal sound of thermal expansion and cold contraction of an air conditioner indoor unit. Background technique [0002] For a long time, when the indoor unit of the air conditioner is running or shutting down, due to the thermal expansion and contraction of the structural parts, the size of the air conditioning components changes, resulting in frictional vibration at the connection point or the contact surface, causing abnormal noise. These abnormal sounds have the characteristics of weak regularity, strong randomness in sound size and occurrence time, but the sound will be reduced and weakened after the air conditioner is running smoothly. This phenomenon is a long-term common problem in the industry. Therefore, in the instruction manuals of various brands of air conditioners, there will be a similar description that "during coo...

Claims

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Application Information

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IPC IPC(8): F24F11/49F24F130/40
CPCF24F11/49F24F2130/40
Inventor 王明全杨丰瑞陈智敏左骏柏中纯
Owner 四川长虹空调有限公司
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