JP7377657B2 - filter structure - Google Patents

Description

The present invention relates to a filter structure, and more particularly to a filter structure that is attached to a range hood with a rectifying plate to prevent oil stains.

BACKGROUND ART Conventionally, there has been a type of range hood equipped with a rectifier plate (range hood with a rectifier plate). This type of range hood has a structure in which air is taken in through the gap between the hood and the rectifying plate, and because the wind speed of the gas passing through this gap is faster, the air is sucked in compared to previous types of range hoods. power is improving.

For such range hoods with rectifying plates, filters have been proposed for use in preventing contamination.

Patent Document 1 discloses that after a fibrous web is formed by mixing meltable synthetic fibers such as polyester fibers and non-meltable fibers such as rayon fibers, a fiber web made of a flame-retardant thermoplastic resin is used for interfiber bonding. A nonwoven fabric manufactured by applying a binder to a fibrous web by spraying or the like and a filter using the same are disclosed. A flame retardant such as a phosphorus-based water-soluble flame retardant compound is added to the binder, and when such a filter is used as a filter for preventing dirt from a range hood or ventilation fan, this flame retardant will cause the non-woven fabric of the filter to Due to its presence throughout the filter, even if fire should come into contact with the filter, it will not burn easily.

However, in a nonwoven fabric using a binder as in Patent Document 1, the binder is applied only to the surface layer of the nonwoven fabric and does not sufficiently penetrate into the inside of the nonwoven fabric, so that fibers may fall off. Furthermore, if the binder is sufficiently penetrated into the interior to increase the adhesion between the inner fibers, there is a risk that the gaps between the fibers will be filled with the binder or become narrower, resulting in a decrease in air permeability. There is. When a nonwoven fabric is used as a filter, a decrease in air permeability may adversely affect the filtration function of the filter.

On the other hand, Patent Document 2 discloses a filter made of a flat glass fiber non-woven fabric (a non-woven fabric made mainly of glass fiber) having a predetermined thickness, which is located between a current plate and a suction port. What can be attached is disclosed. Since such a filter does not use a binder, it is possible to achieve both flame retardancy and breathability.

In addition to these, Patent Document 3 discloses a filter that is attached to the lower end of the hood to cover the current plate and the suction port.

JP2003-236320A Japanese Patent Application Publication No. 2018-153751 Japanese Patent Application Publication No. 2017-015297

However, with the filter of Patent Document 2, there is a risk that oil collected by the filter leaks downward and stains the rectifier plate when used for a long time.

Further, in the filter of Patent Document 3, after use, the oil collected by the filter drips downward, which may stain cooking utensils such as gas stoves and IH cookers.

As described above, there is room for improvement in the conventional filters in terms of the effect of preventing stains on the current plates and the like.

This invention was made in order to solve the above-mentioned problems, and an object thereof is to provide a filter structure with improved stain prevention effect.

In order to achieve the above object, the invention according to claim 1 provides a suction port that serves as an inflow port for air to the fan, an inner hood wall that partitions the periphery of the suction port, and an inner wall of the hood that covers the suction port. In a range hood equipped with a rectifying plate installed at a predetermined distance, a filter structure is attached to a position between the rectifying plate and the suction port, the filter structure comprising a plate-shaped filter body and a rectifying plate side of the filter body. and an air-impermeable bottom cover that covers the surface of the filter body, and the bottom cover is formed into a dish shape so as to cover a part of the side surface of the filter body .

With this configuration, the oil collected by air passing through the filter body from at least the side surfaces of the filter body gathers on the bottom cover. Also, the filter structure can be attached by holding the bottom cover. Furthermore, the collected oil is less likely to leak out and the position of the filter body is stabilized.
The invention according to claim 2 provides a suction port that serves as an inflow port for air to the fan, an inner hood wall that partitions the periphery of the suction port, and a rectifier installed at a predetermined distance from the inner wall of the hood so as to cover the suction port. In a range hood equipped with a plate, the filter structure is attached to a position between the rectifying plate and the suction port, the filter structure having a plate shape and a non-ventilating bottom that covers the surface of the filter body on the rectifying plate side. The filter further includes a top cover that covers the suction port side surface of the filter body, the top cover having an opening communicating with the suction port, the bottom cover having a locking portion, and the top cover having A locked portion that can be locked with the locking portion is formed, and in a state where the locking portion and the locked portion are locked, the filter main body is compressed in the thickness direction.
With this configuration, the oil collected by air passing through the filter body from at least the side surfaces of the filter body gathers on the bottom cover. Also, the filter structure can be attached by holding the bottom cover. Furthermore, some of the collected oil adheres to the top cover. Furthermore, the filter structure can be attached with the top cover and the bottom cover. Furthermore, the filter body can be compressed and fixed from above and below.

According to a third aspect of the present invention, in the configuration of the second aspect of the present invention, the bottom cover is formed into a dish shape so as to further cover a part of the side surface of the filter body.

With this configuration, the collected oil is less likely to leak out, and the position of the filter body is stabilized.

The invention according to claim 4 is the structure of the invention according to any one of claims 1 to 3 , in which the filter body has a thickness of 3 cm to 15 cm.

With this configuration, the size is large enough to filter air flowing in from the side.

According to a fifth aspect of the invention, in the configuration of the invention according to any one of claims 1 to 4 , the filter body is made of a glass fiber nonwoven fabric.

When configured in this way, the fibers are bonded together without using a binder.

According to a sixth aspect of the invention, in the configuration of the invention according to any one of claims 1 to 5 , the bottom cover is made of a heat-resistant synthetic resin.

With this configuration, even if the filter structure reaches a high temperature due to long-term use, it is unlikely to soften or melt.

As described above, according to the first aspect of the invention, the oil collected when air passes through the filter body from at least the side surfaces thereof gathers on the bottom cover, thereby preventing the current plate from becoming dirty. Furthermore, since the filter structure can be attached by holding the bottom cover, attachment becomes easier. Furthermore, since the collected oil is less likely to leak out and the position of the filter body is stabilized, the current plate is further prevented from becoming contaminated.
According to the second aspect of the present invention, the oil collected by air passing through the filter body from at least the side surfaces of the filter body collects on the bottom cover, thereby preventing the current plate from becoming dirty. Furthermore, since the filter structure can be attached by holding the bottom cover, attachment becomes easier. Furthermore, since the collected oil adheres to the top cover, it further prevents the inner wall of the hood from becoming dirty. Furthermore, since the filter structure can be attached by holding the top cover and the bottom cover, attachment becomes even easier. Furthermore, since the filter body can be compressed and fixed from above and below, it is convenient for transportation and disposal.

In addition to the effects of the invention described in claim 2 , the invention set forth in claim 3 makes it difficult for the collected oil to leak out, and the position of the filter body is stabilized, thereby further preventing dirt on the rectifier plate.

In addition to the effects of the invention described in any one of claims 1 to 3 , the invention according to claim 4 has a large enough size to filter the air flowing in from the side, so that it is effective for collecting oil. The properties become better.

The invention set forth in claim 5 has, in addition to the effects of the invention set forth in any one of claims 1 to 4 , improved breathability and dirt collection because the fibers are bonded together without using a binder. You can balance your sexuality.

The invention according to claim 6 has the advantage that, in addition to the effects of the invention according to any one of claims 1 to 5 , softening or melting does not easily occur even if the filter structure reaches a high temperature due to long-term use. , the usage condition of the filter structure becomes stable.

FIG. 1 is a schematic perspective view showing the filter structure according to the first embodiment of the present invention in an open state. 2 is a schematic end view of the II-II line shown in FIG. 1. FIG. FIG. 2 is a schematic perspective view showing the filter structure shown in FIG. 1 in a closed state. It is a schematic perspective view which shows the process of attaching the filter structure shown in FIG. 1 to the range hood with a rectifier plate. FIG. 5 is a schematic end view of the VV line shown in FIG. 4 with the filter structure attached.

FIG. 1 is a schematic perspective view showing a filter structure according to a first embodiment of the present invention in an open state, and FIG. 2 is a schematic end view taken along the line II--II shown in FIG.

Referring to these figures, a filter structure 1 includes a filter body 2 that is a plate-shaped glass fiber nonwoven fabric with a thickness of 10 cm, a bottom cover 3 that covers a lower surface 7 of the filter body 2, and an upper surface 8 of the filter body 2. It mainly consists of a top cover 4 that covers the. The filter body 2 can be deformed without causing structural damage such as tearing even when a load is applied.

In the present invention, regarding the vertical direction, the suction port side is referred to as the upward direction, and the current plate side is referred to as the downward direction, with reference to the case where the current plate is installed at a position between the current plate and the suction port. Further, the thickness of the filter body 2 refers to the thickness before installation unless otherwise specified.

The bottom cover 3 is made of synthetic resin (vinyl chloride resin) and has properties that are impermeable and do not react with oil.

Further, the bottom cover 3 is formed in a dish shape so as to cover not only the lower surface 7 of the filter body 2 but also a part of the side surface 9 (from the lower end to the part that does not substantially affect the air permeability of the filter body 2). has been done. That is, the filter main body 2 is housed in a dish-shaped bottom cover 3.

Further, at the four corners of the bottom cover 3, downwardly projecting recesses 12a to 12d are formed as locking portions.

The top cover 4 is made of synthetic resin (vinyl chloride resin) like the bottom cover 3 described above, and is non-air permeable and oil resistant.

Further, an opening 11 whose periphery is rectangular in plan view is formed in the center of the top cover 4 (a position corresponding to the suction port when the filter structure 1 is attached, which will be described later). Therefore, it can also be said that the top cover 4 covers the upper surface of the filter body 2 except for the central opening 11.

Further, the bottom cover 3 and the top cover 4 are joined to the filter main body 2 using hook-and-loop fasteners (not shown). The hook-and-loop fastener is treated with adhesive on one side, and the adhesive side is adhered to the bottom cover 3 and the top cover 4.

Further, upwardly projecting ribs 14 (ribs 14a, 14b) are formed around the opening 11 and at locations extending in the vertical and horizontal directions from the four corners. Thereby, the strength of the top cover 4 is maintained even if the opening 11 exists. Furthermore, double-sided tapes 10a and 10b are attached near the opening 11. Further, at the four corners of the top cover 4, downwardly protruding convex portions 13a to 13d are formed as locked portions. The positions and shapes of the convex portions 13a to 13d correspond to the respective concave portions 12a to 12d described above. Therefore, by bringing the bottom cover 3 and the top cover 4 relatively close to each other in the vertical direction, each of the recesses 12a to 12d and each of the protrusions 13a to 13d are locked, and the filter body 2 is reduced in thickness. It is fixed in a compressed state (closed state) in the vertical direction. Therefore, it is convenient for transportation and disposal.

Now, with particular reference to FIG. 2, air filtration by the filter structure 1 will be described.

Since the bottom cover 3 is non-breathable, air attempting to pass through the filter structure 1 begins to pass from the sides 9a, 9b of the filter body 2, as shown by arrows 16a, 16b, and begins to pass from the sides 9a, 9b, as shown by arrows 17a, 17b. The filter body 2 is filtered as it moves in a direction perpendicular to the thickness direction, and the filter body 2 exits from the opening 11 as shown by the arrow 18, completing the filtration.

This filter structure 1 is suitably used for a range hood with a rectifier plate (hereinafter sometimes simply referred to as a "range hood").

FIG. 3 is a schematic perspective view showing the filter structure shown in FIG. 1 in a closed state.

Referring to the figure, as described above, when the bottom cover 3 and the top cover 4 are engaged with each other in the recesses 12a to 12d and the projections 13a to 13d, the filter body 2 is compressed in the thickness direction. There is. It is transported and sold in such a closed state.

When in use, each of the concave portions 12a to 12d and each of the convex portions 13a to 13d are unlocked. As a result, the filter body 2 shifts to the open state as shown in FIG. 1 due to its shape restoring force.

Next, FIG. 4 is a schematic perspective view showing the process of attaching the filter structure shown in FIG. 1 to a range hood with a rectifier plate, and FIG. FIG. 3 is a schematic end view of the line.

Referring to these figures, filter structure 1 is attached to range hood 50 to prevent oil stains. Here, the range hood 50 has an inlet 55 that serves as an inlet for air to the fan, an inner hood wall 58 that partitions the periphery of the inlet 55, and a predetermined distance from the inner hood wall 58 so as to cover the inlet 55 downward. This type is equipped with a rectifying plate 53 that is installed by opening the door. Further, the suction port 55 is provided with an internal filter 56, and further above the suction port 55, a fan 57 of a sirocco fan is provided. Further, a hood portion 51 is provided so as to hang down from the periphery of the hood inner wall 58 to provide a gap with the current plate 53. The current plate 53 is removably connected to the hood portion 51 or the hood inner wall 58 by a known means such as a hinge.

When installing the filter structure 1, first remove the rectifier plate 53, place the filter structure 1 in the position between the rectifier plate 53 and the suction port 55 of the range hood 50 as shown by the arrow 61 in FIG. The opening 11 of the cover 4 is attached to the hood inner wall 58 using double-sided tapes 10a and 10b at a position where it communicates with the suction port 55. In this way, the mounting state shown in FIG. 5 is reached. At this time, since the bottom cover 3 made of synthetic resin can be held and attached, there is no need to directly touch the filter body 2, which easily changes its shape, making it easy to attach. In addition, when the top cover 4 is provided, the filter structure 1 can be attached while holding the top cover 4 and bottom cover 3 and fixing the filter body 2 from above and below, so that the deformation of the filter body 2 mainly affects the thickness. It can be regulated so that the direction is the same, making it easier to attach. In addition, by supporting the filter structure 1 from above using the double-sided tapes 10a and 10b, it is possible to prevent the filter body 2 from decreasing in volume due to its own weight, and the position between the rectifying plate and the inner wall of the hood can be adjusted so that there is no gap. It becomes easier to fill without it.

In the installed state, the thickness of the filter main body 2 is set so that it comes into contact with the rectifier plate 53 and the hood inner wall 58 of the range hood 50 to be installed. That is, it is the same as the distance D between the rectifying plate 53 and the hood inner wall 58, or it is smaller than the distance D to such an extent that even if the thickness of the filter body 2 is compressed to the distance D, the filtration function and air permeability will not be affected. is also set for a long time. Note that the thickness of the bottom cover 3 and top cover 4 in the filter structure 1 is approximately several mm and can be ignored, so the thickness of the filter body 2 can be equated with the thickness of the filter structure 1. With this configuration, the filter structure 1 has a high shape recovery property, so it is convenient to use after being transported in a closed state.

During use, air taken in from the gap between the rectifying plate 53 and the rectangular ring-shaped lower end 52 of the hood 51 enters the filter main body 2 as shown by arrows 62a and 62b, and flows as shown by arrows 63a and 63b. As shown, air passes through the suction port 55 in a direction perpendicular to the thickness of the filter body 2, and dust, oil stains, etc. contained in the air are filtered out, and the filtered air is removed as shown by an arrow 64. It is discharged to the outside by a fan 57.

As a result of use, oil collected by air passing through the filter body 2 from at least its side surfaces 9a and 9b accumulates downward and collects on the bottom cover 3, thereby preventing the rectifying plate 53 from becoming dirty.

Furthermore, since the bottom cover 3 is formed into a dish shape as described above, the collected oil is less likely to leak out, and the position of the filter body 2 is stabilized, which further prevents the rectifier plate 53 from becoming contaminated. .

Furthermore, some of the collected oil may travel toward the suction port 55 and the hood inner wall 58 along the flow of the air to be filtered, but the filter structure 1 is equipped with the top cover 4 described above. Since the collected oil adheres to the top cover 4, the suction port 55 and the hood inner wall 58 are further prevented from becoming dirty.

In the above embodiments of the present invention, the filter main body, filter structure, and range hood having specific dimensions and shapes have been described, but the present invention is not limited thereto. The shape of the filter body can be set as appropriate depending on the size of the hood part of the range hood and the rectifier plate.

In addition, in the embodiment of the present invention described above, the thickness of the filter body was set so that it was in contact with the rectifying plate of the installed range hood and the inner wall of the hood, but the thickness of the filter body was It is not limited to this. Note that the thickness of the filter body is preferably 3 cm to 15 cm. With this configuration, the size is large enough to filter the air that flows in from the side, and thus the oil collection performance is improved.

Further, in the above-described embodiments of the present invention, the filter body is made of glass fiber nonwoven fabric, but it may be made of other materials. Note that it is preferably made of glass fiber, rock wool, or flame-retardant synthetic resin. Flame-retardant synthetic resins are produced by chemically or physically treating synthetic resin fibers such as polyethylene terephthalate (for example, attaching organic or inorganic flame retardants to the surface of synthetic resin fibers, or adding these flame retardants to synthetic resin fibers). Non-woven fabrics made of materials that have been made flame retardant (such as by pre-containing them in fibers or incorporating highly flame-retardant components such as halogens into the chemical structure of synthetic resins), and flame-retardant materials such as melamine resins. An example is a breathable sponge-like material made of foamed resin with a high viscosity. The location where the filter structure is installed may reach high temperatures during use, so by configuring it in this way, the fibers are bonded together without using a binder, which has excellent flame retardancy and reacts with water and oil. There is a low possibility that this will occur, and the breathability of the filter body as a whole is ensured. Therefore, it is possible to achieve both breathability and dirt collection performance.

Further, in the above-described embodiments of the present invention, the bottom cover is made of a specific material, but it may be made of other materials such as polyethylene terephthalate or polypropylene. Note that it is preferably made of a heat-resistant synthetic resin such as vinyl chloride resin. With this configuration, even if the filter structure reaches a high temperature due to long-term use, it is unlikely to soften or melt, so that the filter structure can be used stably.

Furthermore, in the embodiment of the present invention described above, the bottom cover is formed in a dish shape so as to cover a part of the side surface of the filter body, but the bottom cover does not need to be formed in a dish shape.

Furthermore, in the embodiments of the present invention described above, the filter structure was provided with a top cover, but the filter structure does not need to be provided with a top cover. In this case, the air that has passed through the filter body during use will escape from the entire top surface of the filter body, but if the top surface of the filter body is configured so that it is close to the inner wall of the hood when installed, there will be no problem in use. Does not occur.

Further, in the above-described embodiments of the present invention, the opening of the top cover has a specific shape, but it may have another shape as long as it communicates with at least a portion of the suction port in the attached state.

Furthermore, in the embodiment of the present invention described above, the locking part of the bottom cover and the locked part of the top cover have a specific structure, but other structures may be used as long as they can be locked to each other. It's okay to have one.

Furthermore, in the embodiment of the present invention described above, the filter body is compressed in the thickness direction in the closed state, but it may not be compressed in the thickness direction.

Furthermore, in the above-described embodiment of the present invention, the filter body is restored to a thickness such that it is in contact with the rectifying plate and the inner wall of the hood in the open state, but the shape is restored to the extent that dirt can be collected. It's fine as long as it's something.

Further, in the above-described embodiments of the present invention, the top cover and the bottom cover are fixed to the filter body using a specific structure, but they may be fixed using another structure such as hot melt. Moreover, it does not have to be fixed.

Further, in the above-described embodiments of the present invention, the top cover is fixed to the inner wall of the hood with a specific structure, but it may be fixed with another structure such as a magnet. At this time, it is convenient if double-sided tape, a magnet, or the like is installed near the opening of the top cover to help position the suction port and the opening.

Further, in the above-described embodiments of the present invention, the top cover is fixed to the inner wall of the hood, but it may not be fixed.

Further, in the above-described embodiments of the present invention, the top cover is provided with ribs having a specific shape, but the ribs may have other shapes. Further, ribs may not be formed.

Furthermore, in the embodiment of the present invention described above, when the filter structure is attached to a range hood, the filter structure is attached in an open state by removing the current plate, but the filter structure may be attached without removing the current plate. However, the filter structure may be placed in the closed state and then shifted to the open state.

1... Filter structure 2... Filter body 3... Bottom cover 4... Top cover 7... Bottom surface 8... Top surface 9... Side surface 11... Opening 12... Recessed part 13... Convex part 50... Range hood 53... Current plate 55... Suction port 57... Fan 58...Inner wall of hood Note that the same reference numerals in each figure indicate the same or equivalent parts.

Claims (6)

A range that includes a suction port that serves as an inlet for air to the fan, an inner hood wall that partitions the periphery of the suction port, and a rectifier plate that is installed at a predetermined distance from the inner hood wall so as to cover the suction port. A filter structure attached to a position between the baffle plate and the suction port in the hood,
A plate-shaped filter body,
and a non-ventilated bottom cover that covers a surface of the filter body on the rectifier plate side ,
In the filter structure, the bottom cover is formed in a dish shape so as to further cover a part of a side surface of the filter main body . A range that includes a suction port that serves as an inlet for air to the fan, an inner hood wall that partitions the periphery of the suction port, and a rectifier plate that is installed at a predetermined distance from the inner hood wall so as to cover the suction port. A filter structure attached to a position between the baffle plate and the suction port in the hood,
A plate-shaped filter body,
and a non-ventilated bottom cover that covers a surface of the filter body on the rectifier plate side ,
further comprising a top cover that covers a surface of the filter body on the suction port side,
The top cover is formed with an opening that communicates with the suction port,
The bottom cover is formed with a locking portion,
The top cover is formed with a locked part that can be locked with the locking part,
In the filter structure , the filter main body is compressed in a thickness direction in a state in which the locking portion and the locked portion are locked . The filter structure according to claim 2 , wherein the bottom cover is formed into a dish shape so as to further cover a part of a side surface of the filter main body. The filter structure according to any one of claims 1 to 3 , wherein the filter body has a thickness of 3 cm to 15 cm. The filter structure according to any one of claims 1 to 4 , wherein the filter body is a glass fiber nonwoven fabric. The filter structure according to any one of claims 1 to 5 , wherein the bottom cover is made of a heat-resistant synthetic resin.

Images