JP5194848B2 - Ventilator louver - Google Patents

Description

  The present invention relates to a louver provided in a ventilation device that is installed on a ceiling or the like and performs ventilation.

  Conventionally, as this kind of louver for a ventilator, a spring engaging member is provided in a casing inside the main body, a spring attached to the louver is attached to the spring engaging member, and the louver is attached to the bottom surface of the ventilator main body. A device louver is known (see, for example, Patent Document 1).

  Hereinafter, the ventilator will be described with reference to FIG.

  As shown in FIG. 10, a box-shaped ventilation device 107 having a suction port 101 on the bottom surface, a ventilation port 102 on the side surface, a motor 103 and a motor holding plate 104 on the top, a blade 105 and a casing 106 inside. And a louver 113 that is mounted so as to cover the opening 112 provided in the ceiling 111 by integrally providing a connection port 108 on the ventilation device 107 side that communicates with the ventilation port 102 and a connection port 110 on the duct 109 side that communicates with the duct 109. In order to mount the louver 113, there are two bifurcated and substantially annular wire springs 114 provided on the back surface of the louver 113, which are engaged with the spring engaging member 115 and attached. It has become.

Here, it is generally known that the shape of the opening at the center of the louver 113 is a mesh-like lattice when a filter for catching dust or the like is provided integrally with the louver 113.
JP 2007-21001 A

  In such conventional ventilator louvers, the lattice of the louvers has a mesh shape, so when wiping and cleaning, dirt in the mesh is difficult to wipe off, or it takes time and effort to wipe off There is a problem that the cleaning property is not very good.

  This invention solves such a conventional subject, and it aims at providing the louver for ventilators which can remove the stain | pollution | contamination of a louver including a filter easily and can improve cleaning property.

  In order to achieve the above object, the ventilator louver of the present invention is provided with an opening serving as a suction port on the lower surface, an exhaust port formed on the side, and a ventilator installed on a ceiling provided with a blower inside. The opening is provided with a filter grill formed integrally with a decorative panel constituted by a plurality of lattices arranged in the same direction and a dustproof filter, and the decorative panel is centered in a direction perpendicular to the lattice direction. It is a curved shape that increases.

  Another means is that both end portions in the longitudinal direction between the lattices are inclined from the surface of the dustproof filter.

  Another means is that the both side surfaces of the lattice are formed so as to be inclined from the surface of the dustproof filter.

  Another means is to integrally form the filter grill and the decorative panel and the dustproof filter by insert molding.

  In another means, a base is provided in the opening, and the filter grill is detachably attached to the base.

  Another means is that the filter grill is provided with an attachment / detachment mechanism for attaching / detaching to / from the base.

  In another means, an attaching / detaching mechanism is provided at the outer edge of the filter grill, and a stopper that engages with the base to hold the filter grill in a proper position and a lever that moves the stopper are provided.

  Another means is that the sliding directions of the lever and the stopper are orthogonal to each other.

  Another means is provided with convex ribs at both ends of the sliding range of the lever.

  In another means, a hook is provided on the base, and a hooking portion that engages with the hook is provided integrally with the filter grill.

  Another means is provided with a plurality of hooks and hooks.

  Another means is that the hooking portion is formed on one side surface so as to be asymmetrical with respect to the center.

  Another means is that the preliminary hooking portion is provided on the same side surface as the hooking portion formed integrally with the filter grill, and does not contact the base when the filter grill is held at a regular position.

  Another means is that a base rib is provided on the base so as to overlap with a lattice provided on the decorative panel.

  Another means is to make the dustproof filter a dark color system.

  According to the present invention, in a ventilator installed on a ceiling provided with an opening serving as a suction port on a lower surface, an exhaust port formed on a side, and a blower inside, arranged in the same direction in the opening. Provided with a filter grill formed integrally with a decorative panel constituted by a plurality of lattices and a dustproof filter, and the decorative panel has a curved shape such that the center is elevated in a direction perpendicular to the lattice direction. Since the grids are arranged in the same direction, wiping in the same direction removes the dirt adhering to the surface of the decorative panel and the dustproof filter at once, and the curved shape makes the torsional rigidity of the filter grille As the filter grill is deformed and attached to the opening, the filter grill is deformed and attached to the opening. The dust filter can be prevented from becoming distorted and the cleaning performance can be improved, and the dust filter is formed so that it can be pulled toward a place with a high curved shape. Therefore, it is possible to provide a ventilator louver which is less likely to generate and has an effect of improving the appearance.

  In addition, by forming both ends in the longitudinal direction between the grids in an inclined shape from the surface of the dustproof filter, dirt on both ends in the longitudinal direction between the grids is smoothly wiped and removed along the slopes. It is possible to provide a ventilator louver that is effective in improving the cleaning performance.

  In addition, by forming the both side surfaces of the grid so as to be inclined from the surface of the dustproof filter, the indoor air dirt collected on the filter grille flows smoothly along the inclined portion and is easily collected by the dustproof filter. At the same time, since the boundary between the filter grill and the dustproof filter can be formed at an obtuse angle, it is possible to provide a ventilator louver that can be easily wiped away from the boundary and can improve the cleaning performance.

  In addition, by forming the filter grille integrally with the decorative panel and the dustproof filter by insert molding, there is no gap between the decorative panel and the dustproof filter. It is possible to provide a ventilator louver that has an effect of being able to be made.

  In addition, the filter grill can be detached from the base by providing a base at the opening and the filter grill can be detachably attached to the base. Remove the filter grill from the base to remove the dirt, and attach it to the base after completion. Therefore, it is possible to provide a ventilator louver that has the effect of improving the cleaning performance.

  In addition, since the filter grill is provided with a detachable mechanism that allows it to be attached to and detached from the base, when removing the filter grille, the user must always hold the parts that come off, so there is no need to worry about dropping and the filter grille can be removed safely. In addition, it is possible to provide a ventilator louver which is effective in that the indoor dirt collected by the dustproof filter is not scattered by the impact of removal.

  In addition, an attachment / detachment mechanism is provided on the outer edge of the filter grill, and a stopper that engages the base and holds the filter grill in the proper position and a lever that moves the stopper are provided. Since the stopper also moves and the filter grill and the base can be easily attached and detached, it is possible to provide a ventilator louver that has the effect of improving the cleaning performance.

  Moreover, since the sliding directions of the lever and the stopper are orthogonal to each other, the sliding directions are perpendicular to each other, so that the range in which the lever slides can be made compact is effective. A louver can be provided.

  In addition, by providing convex ribs at both ends of the sliding range of the lever, the sliding range of the lever can be regulated by the convex rib, thus preventing damage to the lever due to exceeding the sliding range. In addition, even if the base is not firmly installed in the opening, the lever can be operated so that one side of the convex ribs provided at both ends of the sliding range of the lever and the lever can be gripped. It is possible to provide a ventilator louver that can remove the filter grill while restricting the movement of the base to escape, and that can effectively remove the filter grill even at high places.

  In addition, by providing a hook on the base and integrally providing a hooking portion that engages with the hook on the filter grill, the base and the filter grill are engaged even when the attachment / detachment mechanism is damaged. Therefore, it is possible to provide a louver for a ventilator that has an effect of preventing the above-described problem.

  In addition, by providing a plurality of hooks and hooks, even if the attachment / detachment mechanism is damaged, the base and the filter grille are engaged at a plurality of locations, so that the fall of the filter grill can be further prevented. An effective louver for a ventilator can be provided.

  In addition, by forming the hook portion on one side so as to be asymmetrical with respect to the center, a ventilation device louver that has the effect of being able to engage the filter grill and the base at an appropriate position at all times. Can be provided.

  In addition, the preliminary hooking part is provided on the same side as the hooking part formed integrally with the filter grill, and the base and the filter grille are engaged by not contacting the base when the filter grill is held in the proper position. Even if it is detached, the preliminary hook is hooked on the base, so that the filter grill can be prevented from falling, and the preliminary hook is hooked with the base at a position different from the normal position. It is possible to provide a ventilator louver that is capable of easily notifying that the hook of the filter grill is not in a normal state but in an abnormal state.

  In addition, by providing base ribs on the base so as to overlap with the lattice provided on the decorative panel, the ventilator has an effect of preventing the strength of the base from being lowered and reducing the appearance and ventilation resistance. A louver can be provided.

  In addition, since the dust filter is made dark, the dirt attached to the dust filter can be emphasized, so that it is possible to provide a ventilator louver that can improve the cleaning performance. it can.

Ventilation device louver of the present invention, an opening serving as a suction port on a lower surface provided to form an exhaust port on the side, the ventilator is installed on a ceiling having a internal blower, the opening, Provided with a filter grill formed integrally with a decorative panel composed of a plurality of lattices arranged in the same direction and a dustproof filter, the decorative panel has a curved shape such that the center is elevated in a direction perpendicular to the lattice direction The surface of the filter grill is wiped along the lattice of the decorative panel, thereby removing the dirt attached to the surfaces of the decorative panel and the dustproof filter.

  In addition, both ends in the longitudinal direction between the grids are formed so as to be inclined from the surface of the dustproof filter, and when wiping between the grids, dirt on both ends in the longitudinal direction between the grids is wiped along the slope. Has the effect of being removed.

  In addition, both sides of the grid are formed so as to be inclined from the surface of the dustproof filter, and the indoor air collected on the filter grilles flows smoothly along the slopes of the both sides of the grid. In addition, the boundary between the filter grill and the dustproof filter is formed at an obtuse angle, so that the contamination at the boundary can be easily removed.

  Further, the filter grill is formed by integrally forming the decorative panel and the dustproof filter by insert molding, and has an action of covering the resin for forming the decorative panel on the dustproof filter and forming the filter grille.

  In addition, a base is provided in the opening, and the filter grill is detachably attached to the base, and has an effect of attaching or removing the filter grill to the base.

  Further, the filter grill is provided with an attachment / detachment mechanism that attaches / detaches to / from the base, and has an action of attaching / detaching the filter grill provided with the attachment / detachment mechanism to / from the base.

  In addition, the attachment / detachment mechanism is provided on the outer edge of the filter grille, and is provided with a stopper that engages with the base and holds the filter grill in a proper position, and a lever that moves the stopper. The stopper is also moved, and the filter grill and the base are attached and detached.

  Also, the sliding direction of the lever and stopper is assumed to be orthogonal to each other. The lever is slid in a certain direction, and the stopper is slid in the direction perpendicular to the sliding direction of the lever in conjunction with the sliding direction. Thus, the filter grill and the base are attached and detached.

  Also, convex ribs are provided at both ends of the sliding range of the lever, and the lever is slid between the convex ribs so that the filter grill and the base can be attached and detached. Have.

  In addition, a hook is provided on the base, and a hook portion that engages with the hook is provided integrally with the filter grill. The hook portion of the filter grill is hooked on the hook of the base, and the base and the filter grill are engaged. Has the effect of causing

  In addition, a plurality of hooks and hooks are provided, and the hooks of the filter grille are hooked on the hooks of the base to engage the base and the filter grille.

  In addition, the hook portion is formed on one side surface so as to be asymmetrical with respect to the center, and has an action of engaging the filter grill and the base by hooking the left-right asymmetric hook portion on the hook.

  In addition, the preliminary hooking part is provided on the same side as the hooking part formed integrally with the filter grill so that it does not come into contact with the base when the filter grill is held in a proper position. The hook portion of the filter grill is hooked, and the base hook portion and the filter grille are engaged without contacting the preliminary hook portion with the base.

  In addition, the base rib is provided on the base so as to overlap with the lattice provided on the decorative panel. When the filter grill is engaged with the base, the decorative panel lattice and the base rib are overlapped and engaged. It has the action.

  Further, the dustproof filter is a dark color system, and has the effect of making the color of the dustproof filter a dark color system.

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

(Embodiment 1)
As shown in FIGS. 1 to 3, the lower surface 1 is provided with an opening portion 3 provided with an opening engaging portion 24 that engages with a decorative panel 18 (to be described later) serving as a suction port 2, and the side portion 4 has an exhaust port. 5, a motor holding plate 6 is provided at the top, and a box-like ventilation device 11 provided with a motor 7 fixed to the motor holding plate 6, a blower 9 having blades 8 and a casing 10 is provided on the ceiling. 12, the ventilation port 11 side connection port 13 communicating with the exhaust port 5 and the duct side connection port 15 communicating with the duct 14 are integrally provided.

  A filter grill 20 in which a decorative panel 18 provided with a decorative panel engaging portion 17 to be engaged with the plurality of lattices 16 arranged in the same direction and the opening 3 and a dustproof filter 19 are integrally formed is provided with an opening. The decorative panel engaging portion 17 is engaged with the three opening engaging portions 24.

  In addition, the decorative panel 18 includes a curved shape portion 23 that has a curved shape such that the center 22 becomes higher in a direction orthogonal to the lattice direction 21.

  And the shape of the grating | lattice 16 is comprised by the inclination part 27 which the both ends 26 of the longitudinal direction 25 between the grating | lattices 16 incline toward the outer peripheral front surface of the decorative panel 18 from the surface of the dustproof filter 19, and the grating | lattice 16 Both side surface portions 28 are configured by inclined portions 29 that are inclined from the surface of the dustproof filter 19 toward the front surface.

  The filter grill 20 is configured such that the decorative panel 18 and the dustproof filter 19 are integrally formed by insert molding.

  With the above configuration, when the room 30 is ventilated, when the motor 7 of the blower 9 is operated to rotate the blades 8, the air 31 in the room 30 collides with the surface of the curved portion 23 of the decorative panel 18 of the filter grill 20. It flows along the flow path, passes through the dust filter 19 while flowing along the flow path, flows into the blade 8, passes through the exhaust port 5, passes through the duct 14, and is exhausted to the outdoor 32.

  Thus, according to the ventilator louver of Embodiment 1 of the present invention, when cleaning the surface of the filter grill 20, the decorative panel 18 is wiped in one direction along the lattice 16 of the decorative panel 18. And the dirt adhering to the surface of the dustproof filter 19 is removed.

  That is, since the lattices 16 are arranged in the same direction, if the wipes are made in the same direction, the dirt attached to the surfaces of the decorative panel 18 and the dustproof filter 19 can be removed at once, and the filter grill is formed. Since the torsional rigidity of the filter 20 is increased and the filter grill 20 is attached to or removed from the opening 3, it can be prevented that the filter grill 20 is deformed and attached to the opening 3 or is difficult to attach. In addition to improving the cleaning performance, the integrally formed dustproof filter 19 is provided so as to be pulled toward a place with a high curved shape. The effect is to improve the appearance. Further, if wrinkles or sagging does not occur in the dustproof filter 19, the dirt can be removed without leaving the dustproof filter 19 by wiping the dirt with a light force.

  In addition, the curved shape allows the dirt to be concentrated at the central high place, and there may be a case where the action and effect can be obtained by mainly removing the dirt.

  Further, when wiping between the lattices 16, dirt on both end portions 26 in the longitudinal direction 25 between the lattices 16 is wiped and removed along the inclined portions 27, and dirt on both side surfaces 28 of the lattice 16 is inclined. It is wiped along the portion 29 and removed.

  Accordingly, dirt on both end portions 26 in the longitudinal direction 25 between the lattices 16 and both side surface portions 28 of the lattice 16 is smoothly wiped and removed along the inclined portions 27 and 29 which are the respective inclinations. Can be improved.

  As a unique action and effect of the inclined portion 29, the dirt of the air 31 in the room 30 collected on the dust-proof filter 19 of the filter grill 20 flows smoothly along the inclined portion 29 and is collected by the dust-proof filter 19. In addition, since the boundary between the filter grill 20 and the dustproof filter 19 can be formed at an obtuse angle, the dirt on the boundary can be easily removed, and the air 31 in the room 30 collected on the dustproof filter 19 of the filter grill 20 can be removed. Since dirt becomes easy to be collected, as a result, the effect that the cleaning property can be improved is produced. In addition, the inclined portion 29 produces an effect of reducing resistance when the air 31 in the room 30 collected on the filter grill 20 by the blower 9 collides with the lattice 16 so as to pass through the filter grill 20, and the air blowing performance, particularly low This is useful for noise reduction.

  Further, the filter grill 20 is formed by covering the dust filter 19 with the resin for forming the decorative panel 18.

  Therefore, since there is no gap between the decorative panel 18 and the dustproof filter 19, there is no stain removal leakage due to the gap, and the cleaning performance can be improved.

(Embodiment 2)
The second embodiment is different from the first embodiment in that the filter grill 35 is engaged with the base 33. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIGS. 4 to 9, the base 33 is provided in the opening 3, and the filter grill 35 provided with the attaching / detaching mechanism 34 that is attached to and detached from the base 33 is configured to be detachably attached to the base 33.

  The attachment / detachment mechanism 34 is provided in the lattice 16 of the outer edge portion 36 of the filter grill 35, and is provided with a stopper 37 that engages with the base 33 and holds the filter grill 35 in a proper position, and a lever 38 that moves the stopper 37. The configuration.

  Specifically, the stopper 37 is a plate 48 having a hole 47 obliquely downward from the top when viewed from the front, and the lever 38 has a handle portion 50 that is picked by hand on one side surface of a rectangular plate portion 49. On the opposite side surface, a protrusion 52 communicating with the hole 47 is provided.

  Further, the sliding directions of the lever 38 and the stopper 37 are orthogonal to each other, and convex ribs 40 are provided at both ends of the sliding range 39 of the lever 38.

  In addition, a plurality of hooks 41 are provided on the base 33, and a plurality of hook portions 42 that engage with the hooks 41 are integrally provided on the filter grill 35.

  Further, the hook portion 42 is formed so as to be asymmetrical with respect to the center 43 on one side surface of the filter grill 35.

  Further, an inverted L-shaped preliminary hook 45 provided on the decorative panel 44 of the filter grill 35 is provided on the same side as the hook 42 formed integrally with the filter grill 35, and the filter grill 35 is held at a regular position. In this case, the base 33 is not in contact with the upper surface.

  Further, base ribs 46 are provided on the base 33 so as to overlap with the lattice 16 provided on the decorative panel 44 at equal intervals.

  The dustproof filter 19 is configured in a dark color system.

  A method of attaching the filter grill 35 to the base 33 with the above configuration will be described.

  The hook portion 42 having the hole 51 of the filter grill 35 is engaged with the inverted L-shaped hook 41 bent on the inner surface of the base 33 attached to the opening 3.

  Then, the filter grill 35 is pressed against the base 33 so as to rotate like a door, and the stopper 37 held between the stopper holding ribs 54 provided at the end portion on one side surface provided on the back side of the filter grill 35. By sliding the lever 38 sideways between the convex ribs 40, the protrusion 52 of the lever 38 moves in the hole 47 and the stopper 37 moves downward to be inserted into the stopper insertion groove 53 of the base 33. Is done. After insertion, the filter 37 is supported by the stopper holding rib 54 and the base 33 side is supported by the stopper insertion groove 53 by the stopper 37, so that the filter grill 35 can be engaged with the base 33 as a result. become.

  At this time, the preliminary hooking portion 45 includes a rising portion 55 extending substantially perpendicularly from the inverted L-shaped filter grill 35 and a horizontal portion 56 extending horizontally, and the horizontal portion 56 is formed on the upper surface of the base 33. Is not in contact with.

  At this time, the lattice 16 of the decorative panel 44 and the base rib 46 are overlapped and engaged, and the dustproof filter 19 looks dark when viewed from the outside.

  Further, when removing the filter grill 35 from the base 33, the stopper 37 held between the stopper holding ribs 54 provided at the end of one side surface provided on the back side of the filter grill 35 is reversed. By sliding the lever 38 between the convex ribs 40 in the direction opposite to that when the lever 38 is engaged, the protrusion 52 of the lever 38 moves in the hole 47 and the stopper 37 moves upward. The base 33 is disengaged from the stopper insertion groove 53. After removal, the hooking portion 42 having the hole 51 of the filter grill 35 is removed from the inverted L-shaped hook 41 bent on the inner surface of the base 33 attached to the opening 3.

  In addition, in the figure of this Embodiment 2, although the hook 41 and the hook part 42 are each described 2 each, of course, you may provide multiple.

  As described above, according to the ventilator louver of the second embodiment of the present invention, the filter grill 35 can be attached to and detached from the base 33, so that the user can remove the filter grill 35 from the base 33 and remove the dirt at hand. Since the filter grill 35 can be set to the base 33 after being attached to the base 33 after completion, the cleaning property can be improved.

  In addition, since the attachment / detachment mechanism 34 is provided on the filter grill 35 to be removed, when removing the filter grill 35, the user always works while holding the parts to be removed, so that the user can safely remove the filter grill 35 without worrying about dropping. In addition, the dirt in the room collected by the dustproof filter is not scattered by the impact of the removal, so that the cleaning property can be improved.

  Further, by moving the lever 38, that is, sliding, the stopper 37 also moves in conjunction with it, and the attachment / detachment function of the filter grill 35 and the base 33 can be easily operated, so that the cleaning property can be improved. It will be possible.

  In addition, since the sliding directions are perpendicular to each other, the sliding range of the lever 38 can be made compact.

  Further, since the sliding range 39 of the lever 38 can be regulated by the convex rib 40, the damage of the lever 38 due to exceeding the sliding range 39 can be prevented and the installation of the base 33 in the opening 3 is robust. Even if it is not, it can be operated so that one side of the convex rib 40 and the lever 38 are picked, so that the filter grill 35 can be removed while restricting the movement of the base 33 to escape in the operating direction of the lever 38. However, the filter grill 35 can be safely removed.

  Even when the attaching / detaching mechanism 34 is damaged, the base 33 and the filter grill 35 are engaged with each other by the hook 41 and the hooking portion 42, so that the filter grill 35 can be prevented from falling.

  Even when the attachment / detachment mechanism 34 is damaged, the base 33 and the filter grill 35 are engaged at a plurality of locations, so that the fall of the filter grill 35 from the base 33 can be further prevented.

  Further, since the filter grill 35 and the base 33 are not properly engaged unless the asymmetrical hooking portion 42 is hooked on the hook 41 and the filter grill 35 and the base 33 are engaged, the filter grill 35 and the base 33 are always engaged at an appropriate position. Will be able to.

  Even when the base 33 and the filter grill 35 are disengaged, the preliminary hooking portion 45 is hooked on the base 33, so that the filter grill 35 can be prevented from falling, and the preliminary hooking portion 45 is in the proper position. Therefore, the user can easily be informed that the hook of the filter grill 35 to the opening 3 is not a normal position but an abnormal position.

  Further, by providing the base rib 46, it is possible to prevent the strength of the base 33 from being lowered, and to reduce the appearance and the ventilation resistance.

  Moreover, since the dirt adhering to the dustproof filter 19 can be made conspicuous, it can be confirmed whether the dirt has been found and removed, so that the cleaning property can be improved.

  The structure of the louver of the ventilator according to the present invention is also the structure of the louver provided in the air conditioner, blower, etc. by installing the main body on the ceiling or the like and attaching the louver to the suction port to improve the cleanability. Applicable.

The side block diagram which shows the state which installed the louver for ventilators of Embodiment 1 of this invention in the ventilator The perspective view which shows the filter grill of the louver for the ventilator An enlarged front view showing the lattice of the louver for the ventilator The side block diagram which shows the state which installed the louver for ventilator of Embodiment 2 of this invention in the ventilator The perspective view which shows the state which attaches the base and filter grill of the louver for the ventilator Sectional drawing which shows the shape of the filter grill of the louver for the ventilator The perspective view which shows the lever of the louver for the ventilator Front view showing the back of the filter grill of the ventilation device louver Diagram showing the operation of the lever and stopper of the ventilator louver Side configuration diagram showing the state where a conventional ventilator louver is installed in the ventilator

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lower surface 2 Suction port 3 Opening part 4 Side part 5 Exhaust port 9 Blower 11 Ventilator 12 Ceiling 16 Grid 18 Cosmetic panel 19 Dust-proof filter 20 Filter grill 21 Grid direction 22 Center 23 Curved shape part 25 Longitudinal direction 26 Both ends 27 Inclination Part 28 both sides 29 inclined part 33 base 34 attachment / detachment mechanism 35 filter grill 36 outer edge part 37 stopper 38 lever 39 sliding range 40 rib 41 hook 42 hook part 43 center 44 decorative panel 45 preliminary hook part 46 base rib

Claims (14)

In the ventilator installed on the ceiling where the lower surface is provided with an opening serving as a suction port, the side portion is formed with an exhaust port, and a blower is provided inside, a plurality of grids arranged in the same direction in the opening portion Provided is a filter grill formed integrally with a decorative panel and a dustproof filter, and the decorative panel has a curved shape such that the center is high in a direction orthogonal to the lattice direction , longitudinal end portion, ventilation device louver characterized in that the boundary of the dust-proof filter and the filter grill is formed at an obtuse angle angled from the surface of the dust-proof filter. The both side surfaces of the lattice, ventilator louver of claim 1 Symbol mounting characterized by being formed from the surface of the dustproof filter inclined. The ventilation grille louver according to claim 1, wherein the filter grill is integrally formed by insert molding of a decorative panel and a dustproof filter. The ventilator louver according to claim 1, wherein a base is provided in the opening, and a filter grill is detachably attached to the base. The ventilator louver according to claim 4 , wherein the filter grill is provided with an attachment / detachment mechanism for attaching / detaching to / from the base. 6. The ventilator louver according to claim 5 , wherein a detachable mechanism is provided at an outer edge of the filter grill, and a stopper that engages with the base and holds the filter grill in a proper position and a lever that moves the stopper are provided. . The ventilation device louver according to claim 6 , wherein the sliding directions of the lever and the stopper are orthogonal to each other. The ventilator louver according to claim 6 , wherein convex ribs are provided at both ends of a sliding range of the lever. The ventilator louver according to claim 4 , wherein a hook is provided on the base, and a hook portion that engages with the hook is provided integrally with the filter grill. The ventilator louver according to claim 9 , wherein a plurality of hooks and hooks are provided. The ventilation device louver according to claim 9 or 10 , wherein the hook portion is formed on one side surface so as to be asymmetrical with respect to the center. The ventilation device according to claim 9 , wherein the preliminary hooking portion is provided on the same side surface as the hooking portion formed integrally with the filter grill, and does not contact the base when the filter grill is held at a regular position. Louver. The ventilator louver according to claim 4 , wherein base ribs are provided on the base so as to overlap with a lattice provided on the decorative panel. The ventilator louver according to any one of claims 1 to 3 , wherein the dustproof filter is a dark color system.

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