Noise reduction device, extractor hood applying noise reduction device and control method of extractor hood
A range hood and noise reduction technology, which is applied in the field of noise reduction, can solve problems such as adjustment and inability to monitor the noise distribution of range hoods, and achieve good noise reduction effects
Active Publication Date: 2021-03-12
NINGBO FOTILE KITCHEN WARE CO LTD
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Problems solved by technology
[0006] With the above-mentioned noise reduction structure, the noise reduction of the cavity and small holes cannot be adjusted according to the frequency of the noise, and can only be aimed at a specific noise frequency
[0007] In addition, the existing range hoods with noise reduction function are usually unable to monitor the noise distribution inside the range hood, and perform noise reduction and sound absorption for the noise frequency and maximum sound power noise in the area.
Method used
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Embodiment Construction
[0033] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions.
[0034] In describing the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship indicated by "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or element must have a particular orientation, be constructed, and operate in a particular orientation...
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The invention discloses a noise reduction device which comprises a wedge module. The wedge module comprises a wedge. The noise reduction device is characterized in that the noise reduction device further comprises a shell, the shell comprises a bottom plate and side plates arranged on the periphery of the bottom plate, the bottom plate and the side plates define an open shell, the tip end of the wedge faces the direction away from the bottom plate, the side, facing the bottom plate, of the wedge, the bottom plate and the side plates jointly define a cavity, noise reduction holes are formed inthe positions, corresponding to the cavity, of at least one side plate, and the wedge can linearly move relative to the bottom plate to change the size of the cavity. The invention further discloses an extractor hood applying the noise reduction device and a control method of the extractor hood. Compared with the prior art, the noise reduction device has the advantages that the wedge module adoptsthe wedge and the variable cavity to form a two-stage noise reduction mode, so that the noise is effectively absorbed.
Description
technical field [0001] The invention relates to the technical field of noise reduction, in particular to a noise reduction device, a range hood applied with the noise reduction device, and a control method for the range hood. Background technique [0002] Range hoods have become one of the indispensable kitchen appliances in modern families. The range hood uses the principle of fluid dynamics to work, sucks and exhausts the range hood through a centrifugal fan installed inside the range hood, and uses a filter to filter some grease particles. The centrifugal fan includes a volute, an impeller installed in the volute and a motor that drives the impeller to rotate. When the impeller rotates, a negative pressure suction is generated in the center of the fan, and the oil fume under the range hood is sucked into the fan, and after being accelerated by the fan, it is collected by the volute and guided out of the room. [0003] Range hood fan performance and channel characteristi...
Claims
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IPC IPC(8): F24C15/20
CPCF24C15/2021
Inventor 曹元梁雪斐陈瑞于克阳胡巧玲
Owner NINGBO FOTILE KITCHEN WARE CO LTD