Air conditioner and distribution type active noise reduction method for central air conditioner

Abstract

The invention discloses an air conditioner and a distribution type active noise reduction method for a central air conditioner. An input module, an output module and a central processing unit are integrated, a small-range noise reduction area is formed around the output module, it is ensured that within the range outside the noise reduction area, the noise influence is not added, adaptation aimedfor the air conditioner type is not needed, and any position on an air outlet can be selected for mounting. According to the noise reduction method, in the noise reduction target area space, noise iscollected through a microphone, the area noise filed in the area is calculated in real time, the output module is driven to send out the small-area reverse phase noise reduction sound field, the soundenergy of space outside the noise reduction target area is not increased, and due to the fact that the noise reduction area range required to be controlled is small, the algorithm efficiency and thenoise reduction effect can be improved; adaption for different air conditioner and central air conditioner types is not needed, the input module and a loudspeaker can be concentrated on the same device, the input module does not need to be independently mounted on the periphery of a room, and user added mounting is supported.

Description

technical field [0001] The invention relates to the field of air conditioners and central air conditioners, in particular to a distributed active noise reduction method for air conditioners and central air conditioners. Background technique [0002] At present, most of the air-conditioning and central air-conditioning technology fields adopt passive noise reduction methods, and the passive noise reduction methods of air-conditioning and central air-conditioning can no longer meet the current noise reduction requirements for indoor units. Active noise reduction technology is gradually introduced into the field of home appliances. Although There are many active noise reduction methods for reducing indoor air vents, but the focus is only on how to reduce the noise of one air vent, without considering the impact on the indoor proximity to the air inlet or outlet, such as the air inlet and outlet of the central air-conditioning duct machine. The sound waves of the tuyere will int...

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Problems solved by technology

[0002] At present, most of the air-conditioning and central air-conditioning technology fields adopt passive noise reduction methods, and the passive noise reduction methods of air-conditioning and central air-conditioning can no longer meet the current noise reduction requirements for indoor units. Active noise reduction technology is gradually introduced into the field of home appliances. Although There are many active noise reduction methods for reducing indoor air vents, but the focus is only on how to reduce the noise of one air vent, without considering the impact on the indoor proximity to the air inlet or outlet, such as the air inlet and outlet of the central air-conditioning duct machine. The sound waves of the tuyere will interfere with each other. The existing distributed active noise reduction only considers the noise reduction effect of its own noise reduction area, or does not interfere with other noise reduction areas, and does not consider the space outside each noise reduction area. Therefore, Ambient noise in the external space is very likely to increase

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