JP2007017118A - Silencer for range hood - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a silencer for a range hood capable of preventing a noise reduction effect of a porous noise absorbing silencing material from getting low by air contaminated with oil dust or the like contained in oil smoke, and free from anxiety of causing fire easily due to the oil dust. <P>SOLUTION: Two sheets of noncombustible panels 5, 7 having a plurality of holes 5a, 7a, and the porous sound absorbing material 8 are juxtaposed while forming air layers 6 respectively therebetween, the respective holes 5a, 7a in the two sheets of noncombustible panels 5, 7 are formed in a position not overlapped in a front view direction of the range hood 1, in this silencer 3 of the present invention, and the sound reduction effect is maintained thereby over a long period to provide the safe silencer for the range hood. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a silencer that reduces noise generated from a range hood.

  Conventionally, this type of silencer is known in which a sound insulating plate or a porous sound absorbing material is attached in the range hood in order to reduce noise generated from the range hood (see, for example, Patent Document 1).

  Hereinafter, the silencer for the range hood will be described with reference to FIG.

As shown in FIG. 5, by providing a porous sound absorbing material 101 and a panel 102 having a hole in the flow path of the range hood, noise generated in the range hood is silenced. In this apparatus, the sound is silenced by passing sound through the porous sound absorbing material 101 at the back of the panel 102 having the holes.
JP 7-233990 A (page 6-7, FIG. 5)

  In such a conventional silencer, the range hood allows air contaminated with oil dust contained in the oil smoke to pass through, so that oil dust or the like adheres to the surface of the porous sound absorbing material 101 and closes the hole with use. As a result, the noise reduction effect is reduced, and the contained oil may cause a fire.

  The present invention solves such a conventional problem and maintains a noise reduction effect for a long period of time without deteriorating the sound absorption effect of the porous sound absorbing material caused by the adhesion of dirt, An object of the present invention is to provide a silencer for a range hood that is not likely to be promoted.

  In order to achieve the above object, the silencer for a range hood of the present invention includes two incombustible panels having a plurality of holes and a porous sound absorbing material in the ventilation path of the range hood for ventilating air containing oily smoke. An air layer is formed between each of the two incombustible panels, and each hole of the two non-combustible panels is formed at a position that does not overlap with the front view direction of the range hood.

  Another means is that three or more non-combustible panels are juxtaposed, and each hole formed in the adjacent non-combustible panel is formed at a position that does not overlap in the front view direction of the range hood. .

  Another means is that a non-combustible panel and a porous sound absorbing material are integrally formed through an air layer to form a unit.

  In addition, the other means is such that a plurality of incombustible panels can be moved so as to overlap each other.

  In another means, a spring biased in a direction in which an air layer is formed between a plurality of noncombustible panels is provided between the noncombustible panels.

  Another means is that the surface of the incombustible panel is subjected to an oil repellent treatment.

  Another means is that the surface of the incombustible panel is subjected to a hydrophilic treatment.

  Another means is that a spring energized in a direction in which an air layer is formed between a plurality of non-combustible panels is provided between the non-combustible panels, and the surface of the non-combustible panel is subjected to a hydrophilic treatment. is there.

  Another means is that a non-combustible panel is provided with an ultrasonic transducer.

  According to the present invention, there is a possibility that the sound absorption effect is not lowered due to the pores of the porous sound absorbing material being blocked with oil dust or the like, and that the porous sound absorbing material contains oil may cause a fire. Can provide no silencer.

  Further, by unitizing the silencer, maintenance and the like are facilitated, and the sound absorption effect can be easily maintained.

  Further, by making the non-combustible panels movable so as to overlap each other, dirt attached to the rear panel can be wiped off without removing the front panel, and a silencer with improved cleanability can be provided.

  In addition, due to the oil-repellent effect on the surface of the non-combustible panel, the frequency of cleaning can be reduced by reducing the adhesion of dirt, and a silencer that can easily maintain the sound absorption effect can be provided.

  Further, due to the hydrophilic effect of the surface of the non-combustible panel, the attached dirt can be easily cleaned by wiping with water, and a silencer that can easily maintain the sound absorption effect can be provided.

  Further, by vibrating the incombustible panel with an ultrasonic vibrator, it is possible to provide a silencer that makes it difficult for dirt to adhere and can maintain the sound absorption effect over a long period of time.

  The silencer for a range hood according to claim 1 of the present invention includes two incombustible panels having a plurality of holes and a porous sound absorbing material in the ventilation path of the range hood for ventilating air containing oily smoke. An air layer is formed between the two non-combustible panels, and the holes of the two non-combustible panels are formed at positions that do not overlap with the front direction of the range hood. It will not become dirty, and the noise reduction effect of the silencer will be maintained for a long time.

  The silencer for a range hood according to claim 2 is a position where three or more non-combustible panels are juxtaposed, and each hole formed in the adjacent non-combustible panel does not overlap with the front view direction of the range hood. By using three or more non-combustible panels, the passage of oil dust and the like can be prevented even when the diameter of the formed holes is increased, while the noise to the porous sound absorbing material is reduced. The amount of propagation can be increased.

Further, the silencer for the range hood according to claim 3 is a unit in which the non-combustible panel and the porous sound absorbing material are integrally formed through an air layer, and the silencer can be easily attached and detached. Maintenance becomes easy.

The silencer for a range hood according to claim 4 is movable so that a plurality of incombustible panels overlap each other, and when cleaning the incombustible panel, only the incombustible panels are moved so as to overlap each other. The dirty part of the incombustible panel on the back side can be easily cleaned.

Moreover, the silencer for range hoods according to claim 5 is the silencer for range hoods according to claim 4, wherein a spring biased in a direction in which an air layer is formed between a plurality of incombustible panels is the incombustible panel. After the nonflammable panels are overlaid and cleaned, the tension of the spring easily returns to the normal state in which an air layer is formed between the nonflammable panels.

  In addition, the silencer for a range hood according to claim 6 is obtained by applying oil repellency treatment to the surface of the non-combustible panel. The noise reduction effect of the silencer can be maintained.

  The silencer for a range hood according to claim 7 is a nonflammable panel whose surface is subjected to a hydrophilic treatment, and dirt such as oil dust can be easily wiped off due to the hydrophilicity.

  The silencer for a range hood according to claim 8 is the silencer for a range hood according to claim 4, wherein the spring urged in a direction in which an air layer is formed between a plurality of incombustible panels. The surface of the non-combustible panel is provided with a hydrophilic treatment, and a plurality of non-combustible panels are stacked and cleaned, and then returned to the normal state by a spring, and then cleaned. Can be performed more easily.

  The silencer for a range hood according to claim 9 is provided with an ultrasonic vibrator on a non-combustible panel, which makes it difficult for dirt such as oil to adhere to the non-combustible panel, and the opening area of the hole is small. The noise reduction effect of the silencer can be maintained.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

(Embodiment 1)
As shown in FIGS. 1 and 2, a silencer 3 is arranged in a direction perpendicular to the axis of the fan 2 a of the blower 2 provided inside the range hood 1. The silencer 3 is located along the ventilation path 4 that connects the suction port 1a on the lower surface of the range hood 1 to the suction port of the fan 2a. Further, the silencer 3 includes, from the blower 2 side, a nonflammable panel 5 in which a plurality of holes 5a shown in FIG. 2 are arranged, an air layer 6, an incombustible panel 7 in which a plurality of holes 7a are arranged, an air layer 6, The porous sound-absorbing material 8 is arranged in the order, and is integrally formed into a unit. And the holes 5a and 7a of the nonflammable panel 5 and the nonflammable panel 7 are formed in the position which does not overlap, when it looks front in the direction of the range hood 1. FIG.

  In the above-described configuration, when the range hood 1 is operated, dirty air that is sucked in from the suction port 1a on the lower surface and contains oil dust and the like passing through the ventilation path 4 is sucked into the fan 2a of the blower 2 while contacting the incombustible panel 5. To go. At this time, some dirty air passes through the holes 5a of the incombustible panel 5, but the holes 7a of the incombustible panel 7 in the traveling direction do not exist in the straight direction of the air with the holes 5a. The non-combustible panel 7 prevents the flow and makes it difficult to reach the porous sound-absorbing material 8, so that dirt such as oil dust is hardly attached. The noise generated when the air passes through the ventilation path 4 and the noise generated by the blower 2 pass through the hole 5a of the non-combustible panel 5 and the hole 7a of the non-combustible panel 7 while repeating reflection, and enter the porous sound absorbing material 8. Propagated and absorbed.

  As described above, according to the silencer for a range hood of Embodiment 1 of the present invention, the noise reduction effect can be maintained for a long time as the silencer 3 of the range hood 1 with hardly contaminating the porous sound absorbing material 8. Will be able to.

  Further, since the silencer 3 is unitized, it is easy to attach and detach, and maintenance and the like are facilitated.

  In addition, although the number of non-combustible panels is two, the diameter of the holes formed in each of them may be increased to three or more. In this way, the amount of sound propagation to the porous sound absorbing material is increased. And the noise reduction effect can be further improved.

(Embodiment 2)
In FIG. 3 showing the second embodiment, the difference from the first embodiment is that the nonflammable panel 5A on the surface side of the unitized silencer 3A has a movable structure capable of moving in the front-rear direction. The nonflammable panel 5A and the nonflammable panel 7A are connected by a spring 9, and the spring 9 is biased in the direction in which the air layer 6 is formed between the nonflammable panels 5A and 7A.

  In the above configuration, when the inside of the ventilation path 4 becomes dirty with oil dust or the like and is cleaned, the nonflammable panel 5A is pushed against the tension of the spring 9 and moved to a position overlapping the nonflammable panel 7A. The panel 7A is most dirty in the direction in which air goes straight from the hole (not shown) of the non-combustible panel 5A, but this part overlaps the hole of the non-combustible panel 5A, so it is easy to remove the non-combustible panel 5A. In addition, the dirt can be wiped off, the cleaning performance is greatly improved, and the entry of dirt into the porous sound absorbing material 8 can be prevented in advance.

(Embodiment 3)
In the third embodiment, the oil repellent treatment is applied to the surfaces of the non-combustible panels 5 and 7 in the first embodiment.

  This makes it difficult for dirt such as oil to adhere due to oil repellency, prevents dirt from adhering to the non-combustible panels 5 and 7, and reduces the opening area of the holes 5a and 7a with oil dust or the like. The noise reduction effect of the silencer 3 can be maintained for a long time.

(Embodiment 4)
In the fourth embodiment, hydrophilic treatment is applied to the surfaces of the non-combustible panels 5 and 7 in the first embodiment.

  Thereby, dirt, such as oil dust, can be easily wiped off with water by hydrophilicity, the cleaning property is improved, and entry of dirt into the porous sound absorbing material 8 can be prevented beforehand.

Moreover, if hydrophilic treatment is performed on the surfaces of the non-combustible panels 5A and 7A in the second embodiment, the cleaning performance is further improved.

(Embodiment 5)
In FIG. 5 showing the fifth embodiment, the difference from the first embodiment is that the ultrasonic vibrator 10 is provided on the nonflammable panel 5B and the nonflammable panel 7B.

  As a result, the non-combustible panels 5B and 7B are vibrated by the ultrasonic vibrator 10, making it difficult for dirt such as oil to adhere to them, reducing the opening area of holes (not shown) formed in them, and closing them. The noise reduction effect of the silencer 3 can be maintained for a long time.

  The silencer for a range hood according to the present invention is useful as a silencer for a ventilator containing oily smoke because it can be used stably and safely for a long period of time without degrading the performance of the porous sound absorbing material.

The block diagram which shows the range hood incorporating the silencer of Embodiment 1 of this invention Exploded perspective view of the silencer The side view which shows the silencer of Embodiment 2 of this invention The side view which shows the silencer of Embodiment 5 of this invention. Configuration diagram of a range hood incorporating a conventional silencer

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Range hood 3 Silencer 3A Silencer 3B Silencer 4 Ventilation path 5 Nonflammable panel 5a Hole 5A Nonflammable panel 5B Nonflammable panel 6 Air layer 7 Nonflammable panel 7a Hole 7A Nonflammable panel 7B Nonflammable panel 8 Porous sound absorption Material 9 Spring 10 Ultrasonic vibrator

Claims (9)

Two non-combustible panels having a plurality of holes and a porous sound-absorbing material are arranged in parallel in a ventilation passage of a range hood for ventilating air containing oily smoke, forming an air layer between each of the two sheets. Each of the holes of the non-combustible panel is formed at a position that does not overlap the front direction of the range hood. The silencer device for range hoods according to claim 1, wherein three or more incombustible panels are arranged side by side, and each hole formed in the adjacent incombustible panel is formed at a position that does not overlap with the front view direction of the range hood. . The silencer for a range hood according to claim 1 or 2, wherein the non-combustible panel and the porous sound absorbing material are integrally formed through an air layer to form a unit. The silencer for range hoods according to any one of claims 1 to 3, wherein a plurality of incombustible panels are movable so as to overlap each other. The silencer for a range hood according to claim 4, wherein a spring biased in a direction in which an air layer is formed between a plurality of noncombustible panels is provided between the noncombustible panels. The silencer for a range hood according to any one of claims 1 to 5, wherein the surface of the non-combustible panel is subjected to an oil repellent treatment. The silencer for range hoods according to any one of claims 1 to 4, wherein the surface of the non-combustible panel is subjected to a hydrophilic treatment. The silencer for range hoods according to claim 4, wherein a spring biased in a direction in which an air layer is formed between a plurality of non-combustible panels is provided between the non-combustible panels, and a hydrophilic treatment is applied to a surface of the non-combustible panel. apparatus. The silencer for range hoods according to any one of claims 1 to 4, wherein an ultrasonic vibrator is provided on the non-combustible panel.

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