Noise reduction method, system, electronic expansion valve and air conditioner

Abstract

The invention discloses a noise reduction method, system, electronic expansion valve and air conditioner. The method includes: collecting the primary sound source of environmental noise, the environmental noise including electronic expansion valve noise as the noise source, and / or the The near-field noise of the noise source; based on the collected primary sound source, active noise reduction processing is performed on the environmental noise; wherein, the active noise reduction processing on the environmental noise includes: the signal strength of the current environmental noise is lower than When the noise threshold is reached, the noise reduction processing of the current environmental noise is stopped, and after that, the acquisition of the environmental noise is started with a delay to perform a new round of noise reduction processing on the current environmental noise. The solution of the present invention can overcome the defects of poor noise reduction effect, small application range and low reliability in the prior art, and realize the beneficial effects of good noise reduction effect, large application range and high reliability.

Description

technical field [0001] The present invention relates to the technical field of air conditioner noise reduction, in particular to a noise reduction method, system, electronic expansion valve and air conditioner. Background technique [0002] Existing commercial air-conditioning indoor units, such as air duct units, patio units, wall-mounted units, and seat cranes, all use electronic expansion valves for throttling; however, the noise increases suddenly after the valve body throttling. [0003] In order to reduce the sudden increase of noise after throttling of the valve body, the existing technology usually adopts a passive noise reduction method, that is, a thicker damping block is used to wrap the electronic expansion valve and the shunt. This passive noise reduction method can achieve a certain degree of sound absorption and noise reduction, but there are still some shortcomings. For example: [0004] There are blind spots in noise reduction and system fluctuations have ...

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Problems solved by technology

[0006] The object of the present invention is to, in view of the above defects, propose a noise reduction method, system, electronic expansion valve and air conditioner to solve the problems of active noise reduction through real-time noise monitoring, more efficient noise elimination, and improved scope of application and reliability. Problems, so as to achieve the effect of good noise reduction, wide application range and high reliability

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