Method and device for detecting abnormal sound of air-conditioning indoor set

Abstract

The invention discloses a method for detecting the abnormal sound of an air-conditioning indoor set, and the method comprises the steps: collecting a first sound signal of a to-be-detected air-conditioning indoor set during operation; taking a to-be-detected frequency point as the central frequency, and calculating a first critical frequency band noise value and a first single-frequency noise value, which are corresponding to a first sound signal; determining a reference abnormal sound detection threshold value corresponding to the to-be-detected frequency point; determining that the abnormal detection result of the to-be-detected air-conditioning indoor set is qualified when the difference between the first critical frequency band noise value and the first single-frequency noise value is greater than the reference abnormal sound detection threshold value, or else, determining that the abnormal detection result of the to-be-detected air-conditioning indoor set is not qualified. The invention discloses a device for detecting the abnormal sound of the air-conditioning indoor set. During the detection of abnormal sound, an evaluator does not participate each time, and just needs to detect the abnormal sound according to the abnormal sound detection threshold value, thereby effectively unifying the evaluation standard of abnormal sound detection and reducing the manpower cost.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a method and device for detecting abnormal sound of an air conditioner indoor unit. Background technique [0002] At present, people's requirements for air conditioners are getting higher and higher. Air conditioners not only need to meet the basic functional requirements such as cooling and heating, but also need to meet the requirements for quiet and comfortable experience. Common abnormal noises of air-conditioning indoor units are divided into howling sound, refrigerant sound, compressor transmission sound, refrigerant transmission sound, motor abnormal sound and narrow-band noise, etc. Noise complaints have long existed in air-conditioning companies. In order to reduce noise complaints, factory All air conditioners meet the requirements of noise testing. Before leaving the factory, the air conditioners generally need to pass the abnormal sound test. After the abnorm...

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Problems solved by technology

[0004] The main purpose of the present invention is to provide a method and device for detecting abnormal sound of an air conditioner indoor unit, aiming at solving the technical problems that the evaluation criteria for abnormal sound detection cannot be unified and the labor cost is high

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