JP2018153751A - Filter and filter structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter and a filter structure of which filtration efficiency is improved.SOLUTION: A filter 61 is mounted in a position between a straightening vane 53 and a suction port 55 with respect to a range hood 50 which includes the suction port 55 arranged on a hood part 51, an inner wall 58 which surrounds a periphery of the suction port 55, and the straightening vane 53 which is installed on an inner side of a lower end part 52 of the hood part 51 so as to cover the suction port 55 from underneath. The filter includes a filter main body formed in a flat plate shape. With this structure, at least a part of air taken from a clearance between the lower end part of the hood part and the straightening vane starts passing from a side surface of the filter and goes through from an upper surface as a side corresponding to the suction port. Therefore, filtration efficiency can be improved.SELECTED DRAWING: Figure 10

Description

  The present invention relates to a filter and a filter structure, and more particularly to a filter and a filter structure that are attached to a range hood with a current plate to prevent oil contamination.

  Conventionally, various types of range hoods have been developed, and many filters and filter structures have been proposed for attaching to this to prevent oil stains.

  In recent years, a type of range hood provided with a current plate (a range hood with a current plate) has been developed. This type of range hood has a structure in which air is sucked from the gap between the hood part and the current plate, and the wind speed of the gas passing through this gap increases, so the suction power is improved compared to conventional range hoods. ing.

  Further, as disclosed in Patent Document 1, for such a range hood with a rectifying plate, a filter structure that is attached around the lower end portion of the hood portion has also been proposed.

  The filter having such a filter structure is generally a non-woven fabric made of synthetic resin fibers such as polyethylene terephthalate, and its thickness is from 0.5 mm to 10 mm at the maximum. Due to its very thin thickness, in use, the gas passing in the up-and-down direction (thickness direction) is filtered to collect solid dust, liquid / gaseous oil stains, and the like.

JP 2017-015297 A

  However, filters that have been proposed so far only have a very thin thickness even if they are large enough to cover the lower end of the hood. Not too much. Increasing the thickness makes it difficult for air to pass through, so there is a limit even if the design of the material and nonwoven fabric density is changed, and there is still room for improvement in terms of filtration efficiency while ensuring air permeability. there were.

  Moreover, the filter structure for a range hood with a rectifying plate as proposed up to now will cover the entire lower end of the hood including the outer surface of the rectifying plate when the filter is attached. . Therefore, as the use continues, the filter in a state where oil stains are collected is visually recognized, and there is room for improvement in terms of aesthetics and hygiene.

  Furthermore, since the range hood with the current plate has a structure in which air is sucked from the gap between the hood and the current plate as described above, the oil-containing air is mainly sucked from the portion corresponding to the gap of the filter and passes through. As a result, the amount of oil stains adhering to the filter in the portion corresponding to the gap of the filter is larger than that in other portions of the filter. Therefore, other parts other than the part corresponding to the gap can still be used as a filter, but must be replaced with a new filter.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a filter and a filter structure having improved filtration efficiency.

  In order to achieve the above-mentioned object, the invention according to claim 1 includes a suction port provided in the hood portion, an inner wall surrounding the suction port, and a lower end portion of the hood portion so as to cover the suction port below. A filter that is attached to a position between a current plate and a suction port with respect to a range hood that includes a current plate disposed inward, and includes a filter body formed in a flat plate shape.

  If comprised in this way, at least one part of the air taken in from the clearance gap between the lower end part of a food | hood part and a baffle plate will begin to pass from the side surface of a filter, and will escape from the upper surface which is a side corresponding to a suction inlet.

  According to a second aspect of the present invention, in the configuration of the first aspect of the invention, the thickness of the filter body is set so as to be in contact with the inner surface of the rectifying plate and the outer surface of the inner wall. The outer edge in plan view is set to be larger than at least the outer edge in plan view of the suction port.

  If comprised in this way, a filter will filter the gas taken in from the part of the clearance gap between the baffle plate and the outer edge of the lower end part of a hood part in the direction orthogonal to the thickness.

  According to a third aspect of the present invention, in the configuration of the first or second aspect of the present invention, the filter main body is at least a part of the upper surface corresponding to the suction port and the lower surface corresponding to the rectifying plate. All of the sealing process is performed, and the thickness of the part subjected to the sealing process is larger on the lower surface side than on the upper surface side.

  If comprised in this way, shape retention property will improve. When a gas containing oil or the like is filtered, the oil or the like that has been filtered with the use of the filter moves downward and remains in the portion that has been subjected to sealing treatment.

  According to a fourth aspect of the present invention, in the configuration of the third aspect of the present invention, the filter main body is subjected to sealing treatment on a portion of the entire upper surface except for a part thereof.

  With this configuration, the portion of the upper surface of the filter body that is not sealed has higher air permeability than the other portions, so air that has entered from the side of the filter body is sealed on the top surface. Exit to the part that is not done.

  The invention according to claim 5 is the structure according to any one of claims 1 to 4, wherein the filter body is located on the side corresponding to the current plate from the inward position of the upper surface, which is the side corresponding to the suction port. A recess or a through hole that is recessed in the direction toward the lower surface is formed.

  If comprised in this way, gas will pass from the side surface of a filter main body to the surface of the location in which the recessed part or the through-hole was formed.

  According to a sixth aspect of the present invention, in the configuration of the first aspect of the present invention, the filter main body is divided by one or more virtual planes extending in the vertical direction.

  If comprised in this way, a filter main body will be divided | segmented into a some filter member.

  According to a seventh aspect of the present invention, in the configuration of the sixth aspect of the invention, the filter body is directed in a direction from an inward position of the upper surface, which is the side corresponding to the suction port, to a lower surface, which is the side corresponding to the current plate. The recessed part or through-hole which becomes depressed is formed, and a virtual plane passes a recessed part or a through-hole.

  If comprised in this way, a filter main body will be divided | segmented into the several filter member notched so that at least 1 vertex might be removed.

  The invention according to claim 8 is the configuration of the invention according to any one of claims 1 to 7, wherein the outer edge of the filter is set to be approximately the same size as the outer edge of the rectifying plate.

  With this configuration, the distance required for the gas to pass through the filter is maximized.

  The invention according to claim 9 is the constitution of the invention according to any one of claims 1 to 8, wherein the material of the filter body is made of glass fiber, rock wool, or a flame-retardant synthetic resin.

  If comprised in this way, it will become the filter which was excellent in the flame retardance, had a low possibility of reacting to a water | moisture content and oil content, and ensured the air permeability as the whole filter.

  The invention according to claim 10 is a suction port provided in the hood portion, an inner wall surrounding the suction port, and a current plate installed inside the lower end portion of the hood portion so as to cover the suction port below. A filter structure including a range hood provided with a filter and a filter attached to the range hood, wherein the filter is formed in a flat plate shape and attached at a position between the current plate and the suction port.

  If comprised in this way, at least one part of the air taken in from the clearance gap between the lower end part of a food | hood part and a baffle plate will begin to pass from the side surface of a filter, and will escape from the upper surface which is a side corresponding to a suction inlet.

  The invention according to claim 11 is the configuration of the invention according to claim 10, wherein the thickness of the filter is set so as to be in contact with the inner surface of the rectifying plate and the outer surface of the inner wall. The outer edge is set larger than at least the outer edge of the suction port in plan view.

  If comprised in this way, a filter will filter the gas taken in from the part of the clearance gap between the baffle plate and the outer edge of the lower end part of a hood part in the direction orthogonal to the thickness.

  As described above, according to the first aspect of the present invention, at least a part of the air taken in from the gap between the lower end portion of the hood portion and the rectifying plate starts to pass from the side surface of the filter and corresponds to the suction port. Filtration efficiency is improved because the upper surface is removed from the side.

  In addition to the effect of the invention of claim 1, the invention described in claim 2 is such that the filter takes in the gas taken in from the gap between the rectifying plate and the outer edge of the lower end of the hood part with respect to its thickness. Since filtration is performed in the orthogonal direction, the filtration efficiency is improved. Further, the risk that the filter is visually recognized in the appearance of the range hood is reduced.

  In addition to the effects of the invention described in claim 1 or 2, the invention described in claim 3 improves the shape retention, and thus improves usability. In addition, when filtering gas containing oil, etc., the filtered oil, etc. moves downward with the use of the filter and stays in the sealed portion, so the function of collecting the filtered oil, etc. improves. Furthermore, since the sealing process is performed, oil or the like remaining in the sealing process at the lower part of the filter is less likely to permeate the lower surface of the filter, so that contamination such as oil at a position where the lower surface of the filter contacts can be suppressed.

  In addition to the effect of the invention of claim 3, the invention according to claim 4 is that the portion of the upper surface of the filter main body that is not sealed has higher air permeability than the other parts. Since the air that has entered from the side surface of the filter body escapes to the portion of the upper surface that is not sealed, the filtration efficiency is further improved.

  According to the fifth aspect of the invention, in addition to the effect of the invention according to any one of the first to fourth aspects, the gas passes from the side surface of the filter body to the surface of the portion where the recess or the through hole is formed. In addition, it is possible to easily cause a difference in level of air permeability on the upper surface of the filter body.

  According to the sixth aspect of the invention, in addition to the effect of the invention according to any one of the first to fifth aspects, the filter main body is divided into a plurality of filter members. Since the filter body is configured, handling becomes easy. In addition, only the filter member to which oil stains or the like are attached can be replaced, which is economical.

  According to the seventh aspect of the invention, in addition to the effect of the sixth aspect of the invention, the filter body is divided into a plurality of filter members cut out so as to remove at least one apex. Since the filter main body in which the concave portion or the through hole is formed is configured by matching the surfaces, handling becomes easier.

  In addition to the effect of the invention according to any one of claims 1 to 7, the invention according to claim 8 further increases the filtration efficiency because the distance required for the gas to pass through the filter is maximized. To do. Also, the mounting becomes easy.

  In addition to the effects of the invention according to any one of claims 1 to 8, the invention according to claim 9 is excellent in flame retardancy, has a low possibility of reacting to moisture and oil, and has a breathability as a whole filter. Therefore, the filter is excellent as a filter attached at a position between the current plate of the range hood and the suction port.

  In the invention according to claim 10, at least a part of the air taken in from the gap between the lower end portion of the hood portion and the rectifying plate starts to pass from the side surface of the filter and escapes from the upper surface which is the side corresponding to the suction port. Therefore, the filtration efficiency is improved.

  According to the eleventh aspect of the invention, in addition to the effect of the tenth aspect of the invention, the filter takes the gas taken in from the gap portion between the rectifying plate and the outer edge of the lower end portion of the hood portion with respect to its thickness. Since filtration is performed in the orthogonal direction, the filtration efficiency is improved. Further, the risk that the filter is visually recognized in the appearance of the range hood is reduced.

It is a schematic perspective view which shows the external appearance shape of the filter used for the filter structure by 1st Embodiment of this invention. It is a schematic sectional drawing of the II-II line shown in FIG. It is a schematic sectional drawing which shows the cross-sectional structure of the filter used for the filter structure by 2nd Embodiment of this invention, and respond | corresponds to FIG. It is a schematic perspective view which shows the external shape of the filter used for the filter structure by the 3rd Embodiment of this invention, and respond | corresponds to FIG. FIG. 5 is a schematic cross-sectional view taken along the line VV shown in FIG. 4 and corresponds to FIG. 2. It is a schematic sectional drawing which shows the cross-sectional structure of the filter used for the filter structure by 4th Embodiment of this invention, and respond | corresponds to FIG. It is a schematic plan view which shows the aspect in which the filter shown in FIG. 6 is divided | segmented. It is a schematic perspective view which shows the external appearance of the filter member which comprises the filter shown in FIG.6 and FIG.7. It is a figure which shows the attachment method to the range hood with a baffle plate of the filter by each embodiment of this invention. FIG. 10 is a schematic end view of the XX line shown in FIG. 9, showing a state in which the filter has been attached to the range hood with a rectifying plate to form a filter structure.

  FIG. 1 is a schematic perspective view showing the external shape of a filter used in the filter structure according to the first embodiment of the present invention, and FIG. 2 is a schematic cross-sectional view taken along the line II-II shown in FIG.

  With reference to these drawings, the filter 1 is composed of a filter main body 2 made of glass fiber and formed into a flat plate shape that can be used by being deformed.

  In the present specification, the filter 1 can be deformed without causing structural breakage such as tearing due to a load, and deformation is not limited to flexibility or elastic deformation, and greatly impairs the function as a filter. This means that the shape changes to a state where it can be mounted at a position between a current plate and an air inlet, which will be described later. In addition, the filter and filter structure according to the present invention can be used as described later in a deformed state.

  The filter main body 2 has a top surface 4 and a bottom surface 5 sealed by a method as described later, and the thickness of the part subjected to the sealing treatment is set larger on the bottom surface 5 side than on the top surface 4 side. Has been.

  The portion of the filter body 2 that has been subjected to sealing treatment has lower air permeability than the portion that has not been subjected to sealing processing. That is, the air permeability of the side surface 6 of the filter body 2 is set higher than the air permeability of the lower surface 5 of the filter body 2, and the air permeability of the upper surface 4 of the filter body 2 is the air permeability of the lower surface 5 of the filter body 2. It is set higher. This facilitates the passage of gas from the side surface 6 to the upper surface 4 of the filter body 2 as indicated by the arrows indicating the gas flow in FIG. Therefore, compared to the case where gas passes in the vertical direction as in a conventional filter having the same thickness, the distance required for passage becomes easier to extend, and the filtration efficiency is improved.

Here, the air permeability of the upper surface means the air permeability of the sealing portion on the assumption of the thickness of the upper surface side sealing portion. Similarly, the air permeability of the lower surface means the air permeability of the sealing portion on the assumption of the thickness of the lower surface side sealing portion. Further, the air permeability of the side surface means the air permeability of the filter material on the assumption that the thickness of the thinner one of the upper surface side sealing portion or the lower surface side sealing portion is small. The air permeability is, for example, according to the JIS L 1096 method (Fragile method), the amount of air that passes through an area of 1 cm ² per second (cm ³ / cm ² ) when a certain pressure is applied to the test piece. -Can be evaluated by S).

  Moreover, since the filter main body 2 improves shape retention property by having the upper surface 4 and the lower surface 5 processed as mentioned above, usability improves. Also, when filtering the oil contained in the gas, unlike the conventional filter that vents in the vertical direction, the oil etc. that has been filtered with the use of the filter of the present invention moves downward and is sealed. Since it remains in a part, the function which collects the filtered oil component etc. improves. Furthermore, since the sealing process is performed, oil or the like remaining in the sealing process at the lower part of the filter is less likely to permeate the lower surface of the filter, so that contamination such as oil at a position where the lower surface of the filter contacts can be suppressed.

  A filter main body of such a filter is formed by forming quartz glass on a fiber as disclosed in, for example, Japanese Patent Application Laid-Open No. 2008-196101, and attaching it to a net, to which a binder (silane coupling agent, alkoxysilane, Epoxy, urethane, SBR (styrene-butadiene polymer), EVA (ethylene vinyl acetate), vinyl acetate, NBR (acrylonitrile-butadiene polymer), BR (polybutadiene), MBR (methyl methacrylate-butadiene polymer), VP (2 -Vinylpyridine-styrene-butadiene polymer), a method of bonding fibers by applying CR (chloroprene latex, etc.), and glass fibers as disclosed in JP-A-2004-270073 are dispersed in water. A sheet is formed from the resulting mixture to form a sheet. The filter body constructed in this way can be constructed by a known method such as a method of drying after attaching a binder to the surface of the filter. A filter main body having an upper surface and a lower surface sealed is formed by performing a sealing process by a known method such as a resin, PVC (polyvinyl chloride).

  FIG. 3 is a schematic sectional view showing a sectional structure of a filter used in the filter structure according to the second embodiment of the present invention, and corresponds to FIG.

  Since the structure of the filter 11 is basically the same as the structure of the filter 1 according to the first embodiment, the difference will be mainly described.

  Referring to the figure, the filter main body 12 is subjected to sealing treatment on the upper surface 14 in the same manner as the filter 1 according to the first embodiment except for the exposed portion 15 at the center of the upper surface 14. That is, the portion excluding a part of the entire upper surface 14 of the filter body 12 is conspicuous. As a result, the exposed portion 15 which is a portion of the upper surface 14 of the filter body 12 which is not subjected to sealing treatment has higher air permeability than the upper surface side sealing portion 17 which is the other portion. As indicated by the arrows, the air that has entered from the side surface 16 of the filter main body 12 escapes upward from the exposed portion 15 that is the portion of the upper surface 14 that has not been subjected to sealing treatment. Therefore, the distance required for the gas to pass through the filter 11 becomes easier to extend than the filter 1 of the first embodiment, and the filtration efficiency is further improved.

  Such a filter 11 performs the sealing process in the manufacturing process of the filter 1 according to the first embodiment in a state where the position corresponding to the exposed portion 15 is masked during the sealing process, or the sealing process. Is completed by physically or chemically removing the upper surface side sealing portion 17 at a position corresponding to the exposed portion 15.

  Next, FIG. 4 is a schematic perspective view showing the external shape of the filter used in the filter structure according to the third embodiment of the present invention, and corresponds to FIG. FIG. 5 is a schematic sectional view taken along line VV shown in FIG. 4, and corresponds to FIG.

  Since the structure of the filter 21 is basically the same as the structure of the filter 1 according to the first embodiment, the difference will be mainly described.

  With reference to these drawings, the filter main body 22 is formed with a through hole 29 penetrating in a direction from the upper surface 24 toward the lower surface 25 at the center position of the upper surface 24. The portion removed by the formation of the through hole 29 of the filter body 22 has a cylindrical shape.

  As a result, the surface (periphery 30) of the portion where the through hole 29 is formed is not subjected to sealing treatment and becomes a portion having high air permeability. Therefore, as shown by an arrow in the figure, the surface penetrates from the side surface 26 of the filter body 22. Gas passes through the peripheral edge 30 of the hole 29 and escapes upward or downward. As a means for forming the through-hole 29, for example, after sealing the upper and lower surfaces as in the filter 1 according to the first embodiment, the blade is pressed vertically through the filter main body 2 to penetrate the circle. Since the filter main body 22 can be easily configured by removing it in a columnar shape, it is possible to easily generate a relatively highly breathable portion and a low breathable portion on the upper surface of the filter main body 22.

  Next, FIG. 6 is a schematic sectional view showing a sectional structure of a filter used in a filter structure according to a fourth embodiment of the present invention, and corresponds to FIG. 7 is a schematic plan view showing a state in which the filter shown in FIG. 6 is divided, and FIG. 8 is a schematic perspective view showing the external shape of the filter member constituting the filter shown in FIGS. It is.

  Since the structure of the filter 31 is basically the same as the structure of the filter 1 according to the first embodiment, the difference will be mainly described.

  With reference to these drawings, the filter main body 32 has a concave portion 39 that is recessed in the direction from the upper surface 34 toward the lower surface 35 at the center position of the upper surface 34. The portion removed by forming the recess 39 of the filter body 32 has a quadrangular pyramid shape.

  As a result, the surface (peripheral edge 40) of the portion where the concave portion 39 is formed is not subjected to sealing treatment and becomes a portion having high air permeability. Therefore, as shown by an arrow in the figure, the concave portion 39 extends from the side surface 36 of the filter body 32. The gas passes through to the peripheral edge 40 and escapes upward. Furthermore, each surface of the peripheral edge 40 has a taper shape extending in the direction from the lower surface 35 to the upper surface 34. Therefore, for example, compared to the exposed portion 15 which is a portion not subjected to sealing treatment in the second embodiment shown in FIG. As a result, the surface area of the portion not subjected to the sealing treatment increases, and the air flow rate increases.

  The filter body 32 is divided by two virtual planes (planes including boundary lines 42a and 42b in plan view) extending in the vertical direction (thickness direction), that is, linear boundary lines in plan view. 42a and 42b are divided into four filter members 44a, 44b, 45a and 45b. The filter members 44a and 44b have the same shape, and the filter members 45a and 45b have the same shape. Further, the filter member 44a and the filter member 45a have a line-symmetric shape with respect to the boundary line 42a. In other words, the filter member 44a and the filter member 45a are in a mirror image relationship with the surface on which a part of the concave portion 39 is formed as an axis. The virtual plane is formed so as to pass through the recess 39.

  Referring to FIG. 8, the filter member 45 a has a deformable flat plate shape, and is formed with a slope 48 that is cut out so as to remove one vertex on the upper surface 47. The inclined surface 48 becomes one surface of the quadrangular pyramid shape of the concave portion 39 of the filter main body 32 described above.

  Thus, the filter main body 32 is divided into a plurality of filter members 44a, 44b, 45a, 45b, and the filter main body 32 is configured by aligning the cutout portions of each of them in the center. The For this reason, in the manufacturing process, it is possible to manufacture only by forming a flat plate-shaped filter member and then cutting it out so as to remove the apex, thereby facilitating the manufacturing. In addition, since the filter member is compact compared to the filter, it is possible to install by pushing in from multiple directions even in installation places where it is difficult to install a filter having a certain size from one direction. Since it becomes possible, handling becomes easy. Furthermore, it is possible to exchange or sell the filter members individually for convenience. That is, it becomes economical because it is possible to replace only the filter member to which oil stains or the like adhere with use. At this time, the shape of the filter body and the shape of the recess or the through-hole are set to be point symmetric with respect to the center point in plan view, and the dividing boundary lines pass through the center point and the area of the filter body in plan view It is preferable that the filter members have the same shape.

  As explained above, the conventional filter has a limit in the filtration efficiency while ensuring the air permeability of the entire filter because the gas is passed one-dimensionally in the vertical direction (thickness direction). The filter of the present invention dramatically improved the filtration efficiency while ensuring the air permeability of the entire filter based on the novel idea of allowing gas to pass two-dimensionally from the side to the top. Is.

  The filter used for the filter structure according to each embodiment of the present invention described above is preferably used for a range hood (hereinafter simply referred to as “range hood”) including a rectifying plate.

  FIG. 9 is a view showing a method of attaching the filter according to each embodiment of the present invention to a range hood with a current plate, and FIG. 10 is a schematic end view of the XX line shown in FIG. This shows a state where the filter has been attached to the attached range hood and a filter structure has been obtained.

  Referring to these drawings, filter 61 is attached to range hood 50 to prevent oil stains. Here, the range hood 50 includes a suction port 55 provided in the hood portion 51, an inner wall 58 surrounding the suction port 55, and a rectangular ring-shaped lower end portion of the hood portion 51 so as to cover the suction port 55 below. And a rectifying plate 53 installed inside 52. The suction port 55 is provided with an internal filter 56, and a sirocco fan 57 is provided above the suction port 55.

  The filter 61 is made of a nonwoven fabric made of glass fiber or the like, and is formed in a deformable flat plate shape. The thickness of the filter 61 is set so as to be in contact with the inner surface 59 of the rectifying plate 53 of the range hood 50 to be installed and the outer surface 60 of the inner wall 58. That is, the distance between the inner surface 59 of the rectifying plate 53 and the outer surface 60 of the inner wall 58 (the length indicated by D in FIG. 10) is the same as that of the inner wall 58 or the filter 61 can be installed and used. It is set long. Further, the outer edge (the outer edge in the vertical and horizontal directions) of the filter 61 in plan view is set to be substantially the same as the outer edge of the rectifying plate 53 in the installed state.

  When attaching the filter 61 to the range hood 50, as shown by the arrow drawn with a one-dot chain line in FIG. 9, the side surface of the filter 61 is inserted into the gap portion between the rectifying plate 53 and the lower end portion 52, and pushed in. The attachment is completed and the state shown in FIG. 10 is obtained.

  In this way, the suction port 55 provided in the hood portion 51, the inner wall 58 surrounding the suction port 55, and the lower end portion 52 of the hood portion 51 are installed so as to cover the suction port 55 below. The filter structure 70 provided with the range hood 50 provided with the baffle plate 53 and the filter 61 attached with respect to the range hood 50 is comprised.

  In the filter structure 70, as shown by the arrows in FIG. 10, the air taken in from the gap between the rectifying plate 53 and the outer edge of the lower end portion 52 of the hood portion 51 flows into the side surfaces 66 a and 66 b of the filter 61. Since the air enters the filter 61 and the inner surface 59 of the rectifying plate 53 and the outer surface 60 of the inner wall 58 do not vent, air passes to the suction port 55 in a direction orthogonal to the thickness of the filter 61 and is converted into the air. Contained dust and oil stains are filtered. Therefore, the filtration efficiency is improved. In addition, since the filter 61 is attached at a position between the rectifying plate 53 and the suction port 55, the range hood 50 is compared with the case where the entire lower end of the hood portion including the outer surface of the rectifying plate is covered with a filter. The risk of the filter 61 being visually recognized in appearance is reduced.

  Further, since the outer edge of the filter 61 is set to be approximately the same size as the outer edge of the rectifying plate 53 as described above, the distance required for the gas to pass through the filter is maximized. Will be improved. Further, the distance for pushing the filter 61 is shortened, and the mounting becomes easy.

  In each of the above-described embodiments, the filter, the range hood, and the filter structure having specific dimensions and shapes have been described. However, the present invention is not limited to this. The shape of the filter can be appropriately set according to the size of the hood portion of the range hood or the current plate.

  In each of the above embodiments, the thickness of the filter body is set so as to be in contact with the inner surface of the current plate of the range hood to be installed and the outer surface of the inner wall. The thickness is not limited to this. If the filter is installed at a position between the current plate of the range hood and the suction port, at least part of the air taken in from the gap between the lower end of the hood and the current plate passes through the side of the filter. Since it comes out from the upper surface that is the side corresponding to the suction port, the filtration efficiency is improved.

  Furthermore, in each of the above-described embodiments, the specific one surface of the filter body is the upper surface, and the other surface is the lower surface. However, in use, the upper surface is directed upward and the lower surface is directed downward. For example, the upper surface may be the direction in which the filtered gas is desired to pass.

  Further, in each of the above embodiments, the sealing process is performed on the upper surface of the filter body, but the sealing process may not be performed on the upper surface. Further, even when the sealing process is performed on the upper surface, it may be at least part of the upper surface. Further, when the filter is used for a range hood, the top surface and the bottom surface need not be sealed. However, it is preferable that the sealing treatment is performed on both surfaces from the viewpoint of improving shape retention and facilitating mounting, improving the function of collecting oil and the like, and suppressing contamination at the place where the lower surface of the filter contacts.

  Furthermore, in each of the above-described embodiments, the difference in the air permeability was caused by the thickness of the lower side sealing portion of the filter body being larger than the thickness of the upper side sealing portion. By changing the method, a difference in air permeability may be generated with the same thickness.

  Further, in each of the above embodiments, a specific filter is used for the filter structure, but any filter may be used. For example, by using the filter according to the second to fourth embodiments of the present invention, the air permeability of the entire filter is ensured while keeping the filtration efficiency by associating the portion of the upper surface side not subjected to sealing treatment with the position of the suction port. Can be improved. Further, the use of the filter according to the fourth embodiment of the present invention facilitates attachment.

  Further, in each of the above embodiments, the outer edge of the filter of the filter structure is set to be approximately the same size as the outer edge of the current plate, but is set to be at least larger than the outer edge of the suction port in plan view. It only has to be done. The outer edge of the filter may be set to a size larger than the outer edge of the current plate. Moreover, the side surface of the filter may be inclined.

  Furthermore, in each of the above embodiments, the filter is made of glass fiber, but may be made of other materials. However, it is preferably made of glass fiber, rock wool or flame retardant synthetic resin. Flame retardant synthetic resins are chemically or physically treated synthetic resin fibers such as polyethylene terephthalate (for example, organic or inorganic flame retardants are attached to the surface of synthetic resin fibers, or these flame retardants are used as synthetic resins. Non-woven fabric made of flame retardant or melamine resin, etc. that have been added to the fiber in advance or treated with a flame retardant component such as halogen incorporated into the chemical structure of the synthetic resin. For example, a breathable sponge-like material obtained by foaming a high-resin resin can be exemplified. Since the installation location of the filter in the filter structure may reach a high temperature in use, this configuration provides excellent flame retardancy and low risk of reacting to moisture and oil. It becomes a filter that secures. Therefore, it is excellent as a filter attached to a position between the current plate of the range hood and the suction port.

  Furthermore, in the filter according to the second embodiment, the exposed portion is formed at the center position of the upper surface, but it may not be at the center, and it may not be at the center. In the position excluding the outer edge). Moreover, the number is not limited.

  Further, in the third embodiment, the through hole is removed in a columnar shape and the peripheral edge is perpendicular to the cross-sectional view. However, by removing the through hole in a truncated cone shape, the peripheral edge expands upward. It may be formed. By comprising in this way, the surface area of a periphery becomes large and the air permeability as the whole filter improves.

  Furthermore, in the filter member according to the fourth embodiment, one vertex is removed, but a plurality of apexes may be removed.

  Furthermore, in the fourth embodiment described above, the concave portion is formed in the filter. However, a through hole may be formed instead of the concave portion, and the virtual plane may pass through the through hole.

  Furthermore, in the fourth embodiment described above, the filter body is divided by two virtual planes. However, any filter may be used as long as it is divided by one or more virtual planes.

  Furthermore, in the fourth embodiment, the virtual plane is configured to pass through the concave portion, but the virtual plane may be configured not to pass through the concave portion, and in this case, the filter body may include a plurality of filters. The effect by dividing | segmenting into a member can be show | played.

1, 11, 21, 31, 61 ... Filter 2, 12, 22, 32 ... Filter body 4, 14, 24, 34 ... Upper surface 5, 25, 35 ... Lower surface 6, 26, 36, 66 ... Side surface 7, 17 ... Upper surface side sealing portion 8 ... Lower surface side sealing portion 15 ... Exposed portion 39 ... Recessed portion 50 ... Range hood 51 ... Hood portion 52 ... Lower end portion 53 ... Current plate 55 ... Suction port 58 ... Inner wall 59 ... Inner surface 60 ... Outer surface 70: Filter structure

Claims (11)

A range hood comprising a suction port provided in the hood, an inner wall surrounding the suction port, and a rectifying plate installed inside the lower end of the hood so as to cover the suction port below A filter attached to a position between the current plate and the suction port,
A filter comprising a filter body formed in a flat plate shape. The thickness of the filter body is set so as to be in contact with the inner surface of the rectifying plate and the outer surface of the inner wall,
The filter according to claim 1, wherein an outer edge of the filter body in plan view is set to be larger than at least an outer edge of the suction port in plan view. In the filter body, at least a part of the upper surface corresponding to the suction port and the entire lower surface corresponding to the rectifying plate are sealed.
The filter according to claim 1 or 2, wherein a thickness of the portion subjected to the sealing treatment is larger on the lower surface side than on the upper surface side.   The filter according to claim 3, wherein the filter main body is subjected to sealing treatment on a portion of the entire upper surface except for a part thereof.   The said filter main body is formed with a recess or a through hole that is recessed in a direction from an inward position of an upper surface that is a side corresponding to the suction port to a lower surface that is a side corresponding to the rectifying plate. The filter according to claim 4.   The filter according to any one of claims 1 to 5, wherein the filter body is divided by one or more virtual planes extending in a vertical direction. The filter main body is formed with a recess or a through hole that is recessed in a direction from the inner position of the upper surface that is the side corresponding to the suction port to the lower surface that is the side corresponding to the rectifying plate,
The filter according to claim 6, wherein the virtual plane passes through the recess or the through hole.   The filter according to any one of claims 1 to 7, wherein the outer edge of the filter body is set to have approximately the same size as the outer edge of the rectifying plate.   The filter according to any one of claims 1 to 8, wherein a material of the filter body is made of glass fiber, rock wool, or a flame-retardant synthetic resin. A range hood provided with a suction port provided in the hood, an inner wall surrounding the suction port, and a current plate installed inside the lower end of the hood so as to cover the suction port below. A filter structure including a filter attached to the range hood,
The filter is formed in a flat plate shape,
A filter structure attached to a position between the current plate and the suction port. The thickness of the filter is set to be in contact with the inner surface of the rectifying plate and the outer surface of the inner wall,
The filter structure according to claim 10, wherein an outer edge in plan view is set to be larger than at least an outer edge in plan view of the suction port.

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