Noise reduction device, air duct system and fume exhaust system

Abstract

The invention provides a noise reduction device, an air duct system and a fume exhaust system. The noise reduction device is arranged on a shell of the air duct system and comprises a piezoelectric material, an interference signal transmitter and a storage battery; the piezoelectric material, the storage battery and the interference signal transmitter are sequentially connected, and the piezoelectric material is connected with the interference signal transmitter; and the piezoelectric material is arranged on the shell of the air duct system and used for converting energy generated through vibration of the shell of the air duct system into electric energy and storing the electric energy into the storage battery when the shell of the air duct system vibrates and generating voltage signals according to vibration of the shell of the air duct system and transmitting the voltage signals to the interference signal transmitter to enable the interference signal transmitter to transmit sound waves used for inhibiting noise in the air duct system according to the voltage signals. According to the noise reduction device, the air duct system and the fume exhaust system, the technical problem that the noise reduction effect of an existing air duct system is not ideal is solved, the noise reduction effect of the air duct system is improved, and then the experience degree of a user is improved.

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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