Noise reduction device, air duct system and smoke exhaust system

Abstract

The invention provides a noise reduction device, an air duct system and a smoke exhaust system, wherein the noise reduction device is arranged on the housing of the air duct system, including: piezoelectric material, interference signal transmitter and battery; piezoelectric material, battery and The interference signal transmitters are connected sequentially, and the piezoelectric material is also connected to the interference signal transmitter; the piezoelectric material is arranged on the casing of the air duct system, and is used to displace the air duct system when the casing of the air duct system vibrates. The energy generated by the vibration of the casing is converted into electrical energy and stored in the battery, and a voltage signal is generated according to the vibration of the casing of the air duct system, and the voltage signal is sent to the interference signal transmitter so that the interference signal transmitter Emits sound waves for noise suppression in duct systems. The present application alleviates the technical problem of unsatisfactory noise reduction effect in the existing air duct system, improves the noise reduction effect of the air duct system, and further improves user experience.

Description

technical field [0001] The invention relates to the technical field of smoke exhaust systems, in particular to a noise reduction device, an air duct system and a smoke exhaust system. Background technique [0002] At present, people have higher and higher requirements for the noise of range hoods during operation. When selecting range hoods, the requirements for noise and smoking effect will be placed at the same level. For the range hood, the noise generated by it mainly has two parts, one part is the aerodynamic noise generated by the uneven air flow in the air duct, and the other part is the vibration noise radiated by the core components in the air duct system due to vibration. The thin-walled air duct system has limited rigidity and damping, large radiation area and high radiation noise efficiency. Therefore, the noise in this part contributes more and more to the overall noise. In practical applications, a certain The noise reduction method is solved. [0003] At pre...

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Problems solved by technology

[0004] In view of this, the object of the present invention is to provide a noise reduction device, an air duct system and a smoke exhaust system, so as to alleviate the technical problem of unsatisfactory noise reduction effect in the existing air duct system, improve the noise reduction effect of the air duct system, thereby improving the user experience

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