Range hood

A technology for range hood and air supply mechanism, which is applied in the direction of removing oil fume, household stove/stove, ventilation system, etc., can solve the problem of noise of the air supply mechanism, achieve high soundproof performance, ensure the flow path, and easily clean the oil stains.

Active Publication Date: 2020-07-28
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Here, there will be noise problems such as the noise generated when the blower mechanism is running and the wind noise generated when the exhaust gas passes through the range hood.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0206] As the cooker hood, Panasonic Corporation's FY-7HZCJ4 was used.

[0207] The distance between the suction part of the range hood and the rectifying plate is 40mm.

[0208] The size of the suction port is 748mm×600mm.

[0209] The size of the rectifier plate in the plane direction is 637 mm×468 mm, and the thickness is 0.5 mm.

[0210] The size of the connection port is 300mm×270mm.

[0211] In addition, the blower mechanism is disposed on the connection port side of the duct portion.

[0212] The following sound-proof structure was arranged on the rectifying plate of this range hood, and the noise when the suction was set to "strong" was recorded using an iPhone 5 (manufactured by Apple Inc.) connected to a microphone (iQ7, manufactured by Zoom Corporation) and carried out. Measurement.

[0213] As a sound-proof structure, two fine perforated sheets 20E are used aligned in a direction perpendicular to the rectifying plate 18 .

[0214] The fine perforated sheet 20E...

Embodiment 2

[0223] Except having used the following porous sound absorbing body 20A as a soundproof structure, the range hood was produced similarly to Example 1, and the noise was measured by the method similar to the above.

[0224] The porous sound absorbing body 20A was made of urethane (product name: CALMFLEX, manufactured by INOAC Corporation) having a size of 637 mm×468 mm and a thickness of 1 mm. like figure 1 In the example shown, the porous sound absorbing body 20A is provided on the rectifying plate 18 .

[0225] The results are shown in Figure 19 . Figure 19is a graph showing the relationship between frequency and microphone sound pressure level.

[0226] from Figure 19 It can be seen that by arranging the sound-proof structure on the rectifying plate, a high sound-proof effect can be obtained in the frequency band from 1000 Hz to 10000 Hz.

Embodiment 3

[0228] Except having used the following Helmholtz resonator 20C as a soundproof structure, the range hood was produced similarly to Example 1, and the noise was measured by the method similar to the above.

[0229] The Helmholtz resonator 20C is a paper honeycomb structure. A large number of honeycomb cores are arranged on the frame. The thickness of each honeycomb core in the vertical direction is 15 mm, and the distance between the opposing surfaces is 10 mm. The lower surface in the vertical direction of the frame is covered with kraft paper with a thickness of 1mm. In addition, as the perforated plate, an acrylic plate with a thickness of 1 mm was used, and through holes with a diameter of 1 mm were alternately arranged at intervals of 12 mm on the acrylic plate. A perforated plate is disposed on the vertically upper surface of the housing to form a Helmholtz resonator 20C.

[0230] The results are shown in Figure 20 . Figure 20 is a graph showing the relationship bet...

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PUM

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Abstract

In order to provide is a range hood which is small, can ensure a flow path for smoke, and has a good soundproof performance, and with which cleaning of oil stains and the like is easy. This range hoodhas: a suctioning part which has a suctioning opening and which sucks in air from below in the vertical direction; a connection opening that is connected to the suctioning part; a duct part that sends transports the air sucked in from the connection opening and exhausts the air from an exhaust opening to the outside; a blowing mechanism that is provided inside the duct part and that moves the airinside the duct part toward the exhaust opening; and a straightening plate that is disposed inside the suctioning opening of the suctioning part, or disposed so as to cover a portion of the suctioning opening. The distance between the suctioning part and the flow straightening plate is no more than 110 mm, and at least one soundproof structure is provided on the surface on the suctioning part side of the flow straightening plate between the straightening plate and the suctioning part.

Description

technical field [0001] The invention relates to a range hood. Background technique [0002] A cooker hood for exhausting smoke, gas, and the like (hereinafter referred to as exhaust gas) generated during cooking to the outside is installed above heating cooking appliances such as a gas stove and an electric stove. [0003] In addition, in the range hood, there is an air supply mechanism such as an exhaust fan, and by driving the air supply mechanism, the exhaust smoke is discharged to the outside. [0004] Here, noises such as noise generated during operation of the blower mechanism and wind noise generated when the exhaust gas passes through the range hood may arise. Therefore, in order to reduce such noise, it has been proposed to arrange a sound-proof structure in the range hood. [0005] For example, Patent Document 1 describes a range hood comprising a cover portion having a suction gap along the opening peripheral edge of a collection space opened downward, and a blo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F7/06F24F13/24
CPCF24C15/20F24F13/24F24F2013/242
Inventor 山添昇吾菅原美博
Owner FUJIFILM CORP
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