JP4980706B2 - Metal filter cover device - Google Patents

Description

  The present invention relates to a cover device for covering a metal filter element detachably disposed in an exhaust port of a hood such as a range hood, and a filter device using the cover device.

  The range hood sucks in water vapor, dust, oily smoke, etc., so it is very dirty and requires a lot of labor for cleaning. Therefore, usually by attaching a metal filter covered with a fiber cover to the exhaust port of the range hood, replacing the fiber cover soiled with dust or oily smoke, and cleaning the metal filter as necessary, We are trying to save labor in cleaning.

  As a cover for covering such a metal filter, for example, in Japanese Utility Model Laid-Open No. 4-118119 (Patent Document 1), it can be freely attached to and detached from the lower surface of a filter member made of a metal mesh or the like disposed in an intake port of a range hood. A sheet-like filter made of non-woven fabric provided with a bag-like end capable of accommodating the end of the filter frame at one end, and the other end of the sheet-like filter as a filter member. A range hood filter device is disclosed that includes a locking member that is locked in a rolled state. However, in this range hood filter, the structure of the sheet-like filter corresponding to the fiber cover is complicated, and the productivity is lowered. Furthermore, in this filter device, since one end forms a bag shape, when the sheet filter is cut to match the length in the width direction of the metal filter, it functions as a device that covers the metal filter. lose.

Furthermore, in Japanese Patent Laid-Open No. 11-300130 (Patent Document 2), as a filter that can be easily and easily attached, a filter that can cover the front surface of a metal filter, and this filter is tensioned on the front surface. A filter device is disclosed which is composed of a string-like body to be attached to the metal filter. However, in this filter device as well, the structure of the filter as a fiber cover is a structure having a string-like body that can contract the peripheral edge of the filter, and productivity is lowered.
Japanese Utility Model Publication No. 4-118119 (Japanese Utility Model Application No. 3-31109) (Claim 1, paragraph [0021], FIG. 1) Japanese Patent Laid-Open No. 11-300130 (Claims 1 and 2, FIG. 1)

  Accordingly, an object of the present invention is to provide a metal filter element cover device that is highly productive and that can be easily attached to and replaced with a metal filter element of a hood such as a range hood, and a filter device using this device. There is.

  Another object of the present invention is to provide a cover device for a metal filter element that can be tightly attached to a metal filter element and can highly prevent contamination of a hood such as a range hood, and a filter device using this device. There is.

  As a result of earnest studies to achieve the above-mentioned problems, the inventor has a sheet-like cover member that can cover the entire front surface and at least a part of the back surface of the metal filter element, and for temporarily fixing the sheet-like cover member. The present invention has been completed by finding that by combining a specific mounting member, a cover device can be obtained that is highly productive and can be easily mounted and replaced with a metal filter element of a hood such as a range hood.

  That is, the cover device of the present invention is a metal filter that is detachably disposed at the exhaust port of the hood, has a square planar shape, and has an exhaust ventilation area that leaves a non-ventilation area at the periphery. A cover device for covering an element, which is made of a nonwoven fabric and can cover at least a part of an exhaust ventilation area on the entire surface of the metal filter element and the back surface of the metal filter element And an attachment member for attaching and temporarily fixing the sheet-like cover member on the back surface of the metal filter element. In such a cover device, the attachment and replacement to the metal filter element can be easily performed, and the structure of the sheet-like cover member is simple, so that the productivity is high.

  The sheet-like cover member is folded back from the front surface of the metal filter element to the back surface in the length direction of the metal filter element and in the length direction of the metal filter element, and the exhaust ventilation area on the back surface of the metal filter element. You may have the length which can coat | cover at least one part. When the sheet-like cover member has such a size, both contamination prevention of the range hood and operability in attachment and replacement can be achieved. For example, the sheet-like cover member has a size capable of covering the entire exhaust ventilation region on the surface of the metal filter element and 30 to 100% of the exhaust ventilation region on the back surface of the metal filter element. Also good.

  The sheet-like cover member is formed in a ring shape in which at least a part of both end portions in the length direction is integrated and can accommodate the metal filter element, and the metal filter in a state where the metal filter element is accommodated. It may be formed in a size that can be folded back from the front surface to the back surface of the element. Since the sheet-like cover member has such a structure, not only the operability in attachment and replacement is improved, but the entire back surface of the sheet-like cover member can be covered with the nonwoven fabric, so that the contamination of the range hood can be highly prevented.

  The attachment member may be an adhesive tape or a hook-like protrusion member having a hook-stop portion that can be locked to the nonwoven fabric. Since these attachment members are easily available, highly versatile, and simple, they can be easily attached to a metal filter element.

  The attachment member may be capable of temporarily fixing the sheet-like cover member in a non-ventilated area on both sides of the back surface of the metal filter element. In particular, when a part of the exhaust ventilation area on the back surface of the metal filter element is covered, the sheet-like cover is temporarily fixed to the non-ventilation area on both sides of the back surface of the metal filter element by using an attachment member. The member can be temporarily fixed to the metal filter element firmly.

  The mounting member includes a tacking portion that can be latched with respect to the sheet-like cover member that is folded back from both ends in the length direction of the metal filter element, and an elastic string that connects these tacking portions. It may be comprised. When such an attachment member is used, the sheet-like cover member can be tightly attached to the metal filter element by the contraction force of the stretchable string.

  In the present invention, the cover device and the metal hood that is detachably disposed on the exhaust port of the hood, has a square planar shape, and has a non-ventilated area at the peripheral edge to form an exhaust vent area. A filter device for an exhaust port constituted by a filter element is also included.

  In the present invention, the entire surface of the metal filter element and at least a part of the back surface thereof can be covered with a sheet-like cover member, and can be temporarily fixed using an attachment member on the back surface. The cover member can be easily attached and replaced, and the sheet-like cover member can be closely attached to the metal filter element. In particular, since such a cover device has a simple structure, the productivity is high. In addition to covering not only the front surface but also the exhaust ventilation area on the back surface, the contamination of the range hood can be highly prevented. Furthermore, since the metal filter element can be removed and the sheet-like cover member can be replaced at hand, workability is also excellent.

  Hereinafter, the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic perspective view of an exhaust port filter device in which an example of a cover device of the present invention is attached to a metal filter element, and more specifically, the exhaust port filter of the present invention viewed from the back side of the metal filter element. It is a schematic perspective view of an apparatus. FIG. 2 is a schematic perspective view showing a state in which the exhaust port filter device of FIG. 1 is attached to the exhaust port of the range hood. 3 is a partial cross-sectional schematic perspective view showing a mounting structure of the filter device and the exhaust port of the range hood in FIG.

  The metal filter element 2 has a vertically long rectangular shape in plan view, a non-ventilated area 2a at the peripheral edge (peripheral part) that functions as a support frame, and a vertically long film that functions as a filter or a support for a sheet-like cover member. It is comprised with the rectangular-shaped exhaust ventilation area 2b. In the range hood, usually, a plurality of metal filter elements 2 are arranged in parallel to form a metal filter. Therefore, in this invention, each metal filter element 2 which comprises a metal filter is covered with the cover apparatus 1 separately.

  As shown in FIG. 1, the cover device 1 includes a rectangular sheet-like cover member 1 a made of a non-woven fabric and covering the entire front surface of the metal filter element 2 and a part of the exhaust ventilation area 2 b on the back surface, It is comprised with the hook-and-loop fastener, and is comprised by the attachment member 1b for attaching the said sheet-like cover member 1a on the back surface of the metal filter element 2, and temporarily fixing.

  The width of the rectangular sheet-like cover member 1a is substantially the same as the width of the metal filter element 2. On the other hand, the length is about 1.5 times the length of the metal filter element 2. Since the sheet-like cover member 1a has such a size, the sheet-like cover member 1a is folded from the front surface to the back surface at both ends in the length direction of the metal filter element 2, and the metal filter element 2 Covers about half of the exhaust ventilation area on the back of The sheet-like cover member 1a is made of non-woven fabric, covers the entire surface of the metal filter element 2, collects dirt such as dust and oily smoke, reinforces the filter function of the metal filter element 2, and captures it. The collection efficiency is improved. Furthermore, when the sheet-like cover member 1a covers a part of the exhaust ventilation area 2b on the back surface of the metal filter element 2, the filter function is further improved.

  The mounting member 1b is a sheet-like cover in the non-ventilated area 2a on both sides of the back surface of the metal filter element 2 so that the hooked portion of the hook-and-loop fastener is located on the front side (not shown). Affixed at a total of four locations on the end side of the upper and lower folded portions of the member 1a. Specifically, an adhesive is applied to the back surface of the hook-and-loop fastener with the hook portion facing the surface, and the adhesive is stuck on the non-ventilated area 2 a of the metal filter element 2. Therefore, since the hook portion is exposed on the surface of the surface fastener, when the nonwoven fabric constituting the sheet-like cover member 1a is laminated thereon, the nonwoven fabric fibers and the hook portion of the surface fastener are easily engaged with each other. The sheet-like cover member 1a can be temporarily fixed to the metal filter element 2 firmly.

  The size of the mounting member 1b is slightly smaller than the width of the non-venting region 2a of the metal filter element 2, and the length is the length of the folded portion of the sheet-like cover member 1a (metal filter element). The length of the folded portion in the length direction of 2) is about 1/3 times the length.

  In this example, the attachment member 1b having such a size is attached to the end portion side of the folded portion, whereby the sheet-like cover member 1a is temporarily and firmly fixed to the metal filter element 2. Has been.

  In the embodiment of the cover device shown in FIG. 1, the attachment member is preferably attached on the end side of the folded portion, and the width and length of the attachment member are not particularly limited. The width may be larger than the width of the region, and is not particularly limited. It may be about 9 times as wide. The length of the attachment member can be appropriately selected with respect to the length of the folded portion of the sheet-like cover member, and may be larger than the length of the folded portion, but is not particularly limited, but with respect to the length of the folded portion of the sheet-like cover member For example, it may be about 1/10 to 1 time, preferably about 1/5 to 1/2 times.

  As shown in FIG. 2, the filter device 11 composed of the metal filter element 2 covered with the cover device 1 is attached to the exhaust port of the range hood 12. Specifically, the three filter devices 11 are vertically mounted in parallel with a slit (groove) portion 14 provided inside the hood portion 13 for forming an exhaust port.

  Further, as shown in FIG. 3, the detachable mechanism of the filter device 11 (metal filter element 2) with respect to the exhaust port is formed in the upper portion of the hood portion 13 and the slit into which the upper end portion of the filter device 11 can be inserted. Portion 14, a biasing member 15 (spring such as a leaf spring) provided in the slit portion 14, and a slit portion 14 formed at the lower portion of the hood portion 13 and into which the lower end portion of the filter device 11 can be inserted. It consists of and. In this mechanism, the filter device 11 can be easily mounted by simply pushing the upper end portion of the filter device 11 into the upper slit portion 14 of the exhaust port and pushing the lower end portion of the filter device 11 into the lower slit portion 14. The urging member may be provided in a slit portion into which the lower end portion of the filter device can be inserted.

  In such a mounting mechanism, the metal filter element 2 of the filter device 11 is covered with the cover device 1, so that the metal filter element 2 is closely mounted at the adjacent portion between the metal filter elements 2 and the mounting portion with the slit portion 14. Therefore, leakage of dirt such as dust and oily smoke can be highly prevented. Moreover, due to the Coanda effect, the rising airflow has a larger amount of contact in the lower area than in the upper area of the filter device 11. In the filter device 11 of the present invention, the cover member 1 is folded back at the lower end, and the back surface is covered with the sheet-like cover member 1. Further, the metal filter element 2 and the slit portion 14 are closely attached without a gap by folding the sheet-like cover member 1. Therefore, the filter device 11 of the present invention is effective against the rising airflow due to such a Coanda effect, and the collection efficiency against dirt such as dust and oily smoke is greatly improved.

  In addition, the attachment mechanism of the filter apparatus with respect to the exhaust port of a range hood is not limited to such a mechanism, For example, the mechanism using an adhesive tape, a hook-and-loop fastener, a magnet, a suction cup, a screw, etc. may be sufficient.

  FIG. 4 is a schematic perspective view of an exhaust port filter device in which another example of the cover device of the present invention is attached to a metal filter element, and this diagram is also a schematic perspective view of the back surface of the exhaust port filter device.

In this example, the attachment member 21b in the cover device 21 includes a tacking portion 21b ₁ that can be locked to the sheet-like cover member 21a that is folded back from both ends in the length direction of the metal filter element 22; a stretchable hook stopping member made of a stretchable cord 21b ₂ connecting these hook stopper portion 21b _1. As this attachment member 21b, two stretchable tacking members are used on the back surface of the metal filter element 22 so as to intersect with each other in an X-shaped form. That is, the two elastic hook stopping member, so they intersect in an X shape, respectively, in a state where a stretchable cord 21b ₂ was extended, the hook stopper portion 21b _1, the length of the metal filter element 22 The sheet-like cover member 21a facing in the vertical direction is engaged and temporarily fixed.

The stretchable string 21b ₂ is made of a stretchable material, for example, synthetic or natural rubber, a thermoplastic elastomer, or the like. By applying a contraction force or a traction force between the engaging portions, the sheet-like cover member 21a is formed. Even if the position of the locking part with respect to is different, it can be absorbed by the stretchability, and can be temporarily and effectively temporarily fixed. Furthermore, since the elastic string 21b ₂ has a string shape, even if the elastic string 21b2 is arranged in a form crossing the back surface of the metal filter element 22, the air permeability on the back surface is not significantly inhibited.

As long as the tacking portion 21b ₁ is formed at both ends of the stretchable string 21b ₂ and has a tacking portion that can be engaged with the nonwoven fabric, the material is not particularly limited, but it is usually made of metal or plastic. Yes. The tacking portion 21b ₁ and the elastic string 21b ₂ are connected and integrated by clamping or welding.

  In the embodiment of the cover device shown in FIG. 4, the length of the stretchable string can be appropriately selected according to the distance between both ends of the sheet-like cover member, the elastic modulus of the stretchable string, and the like. For example, the stretchable length of the elastic string is 1.2 to 5 times, preferably about 1.5 to 3 times the length of the non-stretched length. Is preferred.

  The elastic tacking member is not limited to a member using an elastic string, and may be a member using a spring (for example, a helical spring). In the case of an elastic tacking member using a spring, the spring part may be formed in the center part of the member, and the tacking part may be formed by curving both end parts of the member.

  The arrangement of the mounting members is not limited to an aspect in which the two elastic tacking members intersect with each other in an X-shaped form, and a plurality of elastic tacking members are arranged in parallel or parallel to the width direction of the metal filter element. However, it is possible to apply a contraction force or a traction force over the entire area between the locking portions by arranging the two elastic tacking members so as to cross each other. The sheet-like cover member can be securely and firmly temporarily fixed to the filter element.

  In the embodiment of the sheet-like cover member shown in FIGS. 1 and 4, the width of the sheet-like cover member only needs to be larger than the width of the exhaust ventilation region of the metal filter element, and is substantially the same as the width of the metal filter element. It is not limited to the same. For example, it may be larger than the width of the metal filter element and may be temporarily fixed by folding back to the back surface at both sides as well as both ends. By folding back both sides, it is possible to highly prevent the leakage of dust and oily smoke.

  The length of the sheet-like cover member is not limited to about 1.5 times the length of the metal filter element as long as the length of the sheet cover member is larger than the length of the metal filter element and can be folded back. For example, it can be selected from a range of about 1.1 to 1.8 times, preferably about 1.2 to 1.7 times the length of the metal filter element. It should be noted that the length of the folded portion is preferably symmetrical at both ends from the viewpoint of simplicity of work, but the lower end is folded from the viewpoint of improving the efficiency of collecting dirt against the rising air current due to the Coanda effect. You may enlarge the length of a part.

  The attachment member is not limited to a hook-shaped projection member such as a hook-and-loop fastener or a stretchable tacking member, and may be, for example, an adhesive tape or a magnet. In the case of the pressure-sensitive adhesive tape, for example, the both ends of the folded sheet-like cover member may be temporarily fixed with the pressure-sensitive adhesive tape across the sheet-like cover member and the non-ventilated area of the metal filter element. In the case of a magnet, the magnet may be temporarily attached to the non-venting area of the metal filter element by adsorbing the magnet from above the sheet cover member at the folded portion of the sheet cover member.

  The material of the mounting member is selected according to its type. For example, in the case of a hook-and-loop fastener, it may usually be a plastic such as a polyester resin, a polyamide resin, an olefin resin, etc. In addition to the same plastic, a laminate of metal foil and plastic may be used.

  FIG. 5 is a schematic perspective view of an exhaust port filter device in which still another example of the cover device of the present invention is attached to a metal filter element, and this drawing is also a schematic perspective view of the back surface of the exhaust port filter device.

  In this example, in the cover device 31, the rectangular sheet-like cover member 31 a made of a nonwoven fabric has both end portions in the length direction integrated by sewing (sewing) or welding, and the metal filter element 32 is integrated. It is formed in a ring shape that can be accommodated. That is, the width of the sheet-shaped (or ring-shaped) cover member 31a is substantially the same as the width of the metal filter element 32, but the length (the length when the integrated ring-shaped sheet is developed) is metal. The length of the filter element 32 is about 2.5 times. Since the sheet-like cover member 31a has such a shape and size, an excess portion of the metal filter element 32 is removed from the upper end of the metal filter element 32 in a state where the metal filter element 32 is accommodated. The metal filter element 32 is folded not only from the front surface to the back surface, but also covers the entire back surface of the metal filter element 32. Therefore, the dirt which has passed through the sheet-like cover member 31a on the front surface side can be collected also by the sheet-like cover member 31a on the back surface side, and the contamination prevention of the range hood can be highly improved. Incidentally, the sheet-like cover member 31 a is layered on the back surface of the metal filter element 32 in a three-fold manner at the folded portion located at the upper part of the back surface of the metal filter element 32.

  Note that both ends in the length direction of the sheet-like cover member are not limited to welding and sewing, and may be integrated by an adhesive, a stapler, or the like. Furthermore, since both ends are folded back, the strength is not so required. Therefore, both ends do not need to be integrated over the whole, and may be integrated at least at one place in the width direction, preferably at a plurality of places. About the width | variety of a sheet-like cover member, it is the same as that of the sheet-like cover member shown by FIG.1 and FIG.4, About length, if a metal filter element can be accommodated, it will not specifically limit, Metal filter From the viewpoint of workability to temporarily fix the element, it is about 2.2 times (for example, 2.3 to 3 times) the length of the metal filter element.

  The attachment member 31b is an adhesive tape, and 2 at both ends of the folded sheet-shaped cover member 31a so as to straddle the boundary between the folded sheet-shaped cover member 31a and the sheet-shaped cover member 31a that is not the surplus part. It is affixed at a place and temporarily fixed to the metal filter element 32. The attachment member 31b is adhered to the sheet-like cover member 31a on the non-ventilated region on both sides of the back surface of the metal filter element 32 so as not to impair the breathability of the sheet-like cover member 31a. The size of the attachment member 31 b is a width that is slightly smaller than the width of the non-venting region of the metal filter element 32. The length is about 1/3 times the length of the folded portion of the sheet-like cover member 31a, and the central portion of the length is the folded-up excess portion of the sheet-like cover member 31a, It sticks so that it may become the boundary vicinity with the sheet-like cover member 31a which is not an excessive part.

  FIG. 6 is a schematic perspective view showing another example of the exhaust port filter device attached to a metal filter element according to another example of the cover device of the present invention. This figure is also a schematic perspective view of the back surface of the exhaust port filter device. FIG.

In this example, the sheet-like cover member is similar to FIG. 5, the mounting member 41b is stretchable hook stopping member hook retaining portion 41b ₁ is formed on both ends of the spring portion 41b _2. In this cover device 41, the clasp portions 41 b ₁ of the stretchable clasp member are folded back at both end portions of the sheet-like cover member 41 a and the sheet-like cover member 41 a of the surplus portion is folded back and the sheet-like cover member that is not the surplus portion. It is engaged with the sheet-like cover member at two locations and temporarily fixed to the metal filter element 42 so as to straddle the boundary with 41a. As the mounting member 41b, 2 two elastic hook stopping member, respectively, in a state in which extending the spring portion 41b _2, the hook stopper portion 41b _1, temporarily fixed to are engaged with the sheet-like cover member 41a Yes. The size of the attachment member 41 b is such that the width of the spring portion 41 b ₂ is slightly smaller than the width of the non-venting region of the metal filter element 42. The length of the attachment member 41b is the same as the length of the folded portion of the sheet-like cover member 41a in the extended state, and the central portion of the length is the same as the length of the folded sheet-like cover member 41a. , And are engaged so as to be in the vicinity of the boundary with the sheet-like cover member 41a that is not an excessive portion.

The spring portion 41b ₂ is a helical spring, may be any capable of forming a spring having elasticity, it is not particularly the material is limited, is usually composed of such a metal or plastic. The tacking portion 41b ₁ is formed by bending both end portions of the spring portion 41b ₂ so as to be engageable with the nonwoven fabric.

  In the embodiment of the sheet-like cover member shown in FIGS. 5 and 6, the width of the sheet-like (or ring-like) cover member may be larger than the width of the exhaust ventilation area of the metal filter element. The width of the element is not limited to substantially the same. For example, it may be larger than the width of the metal filter element and may be temporarily fixed by folding back to the back surface at both sides.

  The length of the sheet-shaped (or ring-shaped) cover member (the length when the integrated ring-shaped sheet is expanded) is larger than twice the length of the metal filter element, and can accommodate the metal filter element And what is necessary is just to be able to fold back to a back surface, and it is not limited to about 2.5 times with respect to the length of metal filter elements. For example, it can be selected from a range of about 2.1 to 3.5 times, preferably 2.2 to 3 times, and more preferably about 2.3 to 2.8 times the length of the metal filter element. In this aspect, not only can it be tightly attached to the exhaust port of the range hood, preventing leakage of dirt, but also the entire back surface of the metal filter element can be covered with a sheet-like cover member. But you can definitely collect dirt.

  The attachment member is not limited to a hook-shaped projection member such as an adhesive tape or a stretchable tacking member, and may be, for example, a hook-and-loop fastener or a magnet. In the case of a hook-and-loop fastener, for example, on both sides of the folded sheet-like cover member, a space between the sheet-like cover member of the folded excess portion and the sheet-like cover member that is not the excessive portion may be temporarily fixed with a hook-and-loop fastener. In this case, the hook-and-loop fastener may be attached to the folded-up excess portion of the sheet-like cover member and the non-excess portion of the sheet-like cover member by bonding or welding. Further, in the case of a magnet, the magnet is attracted by magnetic force from above the sheet-like cover member that is folded and tripled against the non-ventilated area of the metal filter element at the folded portion of the sheet-like cover member. You may stop it.

  The length of the attachment member can be appropriately selected with respect to the length of the folded portion of the sheet-like cover member, and is, for example, 1/10 to 2 times, preferably 1 with respect to the length of the folded portion of the sheet-like cover member. / 5 to 1 times, more preferably about 1/4 to 1/2 times.

  In the exhaust port filter device of the present invention, the metal filter element only needs to be formed of a metal that can exhibit rigidity, and can be formed of various metals such as iron-based metal (such as stainless steel) and aluminum. The shape of the metal filter element is not limited to a rectangular shape, and may be, for example, a square shape. Furthermore, a metal filter element is not limited to the aspect which comprises a metal filter with a some combination, The aspect which comprises a metal filter independently may be sufficient.

  As a nonwoven fabric which comprises a sheet-like cover member, as long as it has air permeability, the nonwoven fabric comprised by various fibers can be used. Examples of the fibers include natural fibers [plant fibers (cotton, hemp, pulp, etc.), animal fibers (wool, mohair, cashmere, silk, etc.)], regenerated fibers [rayons (rayon, copper ammonia rayon, etc.), cellulose, etc. Non-synthetic fibers such as saponified fibers, protein fibers, alginic acid fibers, etc. obtained by saponifying ester fibers (such as acetate fibers); synthetic fibers (polyester fibers, polyamide fibers, acrylic fibers, urethane fibers, polyvinyls) And non-chlorine synthetic fibers such as alcohol fibers and polyolefin fibers; chlorine synthetic fibers such as vinyl chloride fibers and vinylidene chloride fibers). These fibers can be used alone or in combination of two or more. Of these fibers, polypropylene fibers, polymethyl methacrylate fibers, aliphatic polyamide fibers, polyethylene terephthalate fibers, etc. are preferred from the viewpoint of versatility, and polyvinyl terephthalate fibers are preferred from the viewpoint of flame retardancy. Flame retardant fibers in which polyvinyl chloride is present in a fibril form in an alcohol matrix are preferred, and non-chlorine synthetic fibers, natural fibers, recycled fibers, aliphatic polyesters, etc. are preferred from the viewpoint of environmental conservation and biodegradability. .

  The fiber may contain various additives such as flame retardants, plasticizers, stabilizers (antioxidants, ultraviolet absorbers, etc.), antistatic agents, fillers, colorants and the like.

  The thickness of the fibers constituting the nonwoven fabric can be appropriately selected in consideration of the strength and breathability of the sheet-like cover member. The thickness of the fiber is, for example, about 2 to 20 denier and is often 10 denier or less (for example, about 5 to 10 denier).

The density of the nonwoven fabric is not particularly limited as long as it does not impair the collection efficiency of components such as oily smoke. For example, the basis weight is 10 to 500 g / m ² , preferably 20 to 300 g / m ² , particularly about 30 to 200 g / m ^2. May be.

  The coverage of the exhaust ventilation area on the back surface of the metal filter element by the sheet-like cover member can be selected from a range of, for example, about 30 to 100%, but from the viewpoint of dirt collection, the coverage is higher. For example, it may be 50 to 100%, preferably 70 to 100%, more preferably 100% (the entire back surface). The coverage may be, for example, about 30 to 80%, preferably about 40 to 60%, from the viewpoint of the balance between air permeability and dirt trapping property.

  The exhaust port filter device of the present invention can be disposed at the exhaust port of various range hoods. Range hoods include, for example, a range hood with a fixed hood, a range hood from which the hood can be pulled out, a hood that can slide in the front-rear direction above a cooking unit such as a gas stove, and a current plate Range hood. Further, the range hood may be a shallow range hood or a deep range hood.

  INDUSTRIAL APPLICABILITY The present invention is useful as a range hood, a metal filter element cover device installed in the range hood, and a filter device equipped with the cover device.

FIG. 1 is a schematic perspective view showing an example of a filter device for an exhaust port in which an example of a cover device of the present invention is attached to a metal filter element. FIG. 2 is a schematic perspective view showing a state in which the exhaust port filter device of FIG. 1 is attached to the exhaust port of the range hood. 3 is a partial cross-sectional schematic perspective view showing a mounting structure of the filter device and the exhaust port of the range hood in FIG. FIG. 4 is a schematic perspective view showing another example of the exhaust-port filter device in which another example of the cover device of the present invention is attached to a metal filter element. FIG. 5 is a schematic perspective view showing still another example of the exhaust port filter device in which still another example of the cover device of the present invention is attached to a metal filter element. FIG. 6 is a schematic perspective view showing another example of the exhaust port filter device in which another example of the cover device of the present invention is attached to a metal filter element.

Explanation of symbols

1, 21, 31, 41... Cover device 1 a, 21 a, 31 a... Sheet-like cover member 1 b, 21 b, 31 b ... attachment member 21 b ₁ , 41 b ₁ ... barbed part 21 b ₂ : elastic string 41 b ₂ : spring part 2 22, 32, 42 ... Metal filter element 2a ... Non-venting zone 2b ... Exhaust venting zone 11 ... Filter device 12 ... Range hood 13 ... Hood portion 14 ... Slit portion 15 ... Biasing member

Claims (5)

A cover device for covering a metal filter element that is detachably disposed at an exhaust port of a hood and has a square shape in a plan view and that has a non-ventilated area at the peripheral edge and an exhaust vent area. And
It is composed of a non-woven fabric and can cover at least a part of the exhaust ventilation region on the entire surface of the metal filter element and the back surface of the metal filter element, and at least a part of both end portions in the length direction are integrated. A sheet-like cover member formed into a ring shape capable of accommodating a metal filter element ;
The cover apparatus comprised with the attachment member for attaching and temporarily fixing this sheet-like cover member on the back surface of the said metal filter element. Sheet cover member, the cover device according to claim 1, characterized in that formed in the size which can be folded back to the rear surface direction while accommodating the metallic steel filter element from the surface of the metal filter element.   The cover device according to claim 1, wherein the attachment member is a hook-like protrusion member having a hook-stop portion that can be locked to the adhesive tape or the nonwoven fabric.   The attachment member includes a tacking portion that can be latched with respect to the sheet-like cover member that is folded back from both ends in the length direction of the metal filter element, and an elastic cord that connects these tacking portions. The cover device according to claim 1, which is configured.   2. The cover device according to claim 1, and a metal filter that is detachably disposed at the exhaust port of the hood and has a square planar shape, and an exhaust ventilation area is formed while leaving a non-ventilation area at the periphery. Filter device for exhaust port composed of elements.

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