Ventilation device

Abstract

To improve ventilation efficiency by holding a filter of a ventilation device without using a filter cover.SOLUTION: A device body 1 has a filter storage section 18 on an indoor side of a ventilation port forming region 11x with an indoor side ventilation port 11a formed on a front wall 11. A filter 40 is detachably stored in the filter storage section 18. The front wall 11 has an upper cover 50 installed in an upper side region of the ventilation port forming region 11x and a lower cover 60 (holding member) installed in a lower side region thereof. The lower cover 60 is detachable. A fitting section 52 of the upper cover 50 is fitted with an upper side engagement protrusion 18x of the filter storage section 18 and a fitting section 61 of the lower cover 60 is fitted with a lower side engagement protrusion 18y. The fitting section 52 of the upper cover 50 has a pressing section 52a which presses an upper edge section of the filter 40 and the fitting section 61 of the lower cover 60 has a pressing section 61a which presses a lower edge section of the filter 40.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a ventilation device that is incorporated into a window screen or the like. [Background technology]

[0002] The ventilation device incorporated in window screens and the like has a device body made of one or more moldings. The device body has a front wall on the indoor side and a back wall on the outdoor side, and has a ventilation passage inside. The ventilation passage is connected to the indoors through a ventilation opening formed in the front wall, and to the outside through a ventilation opening formed in the back wall.

[0003] As disclosed in Patent Document 1, the device main body has a filter housing section on the indoor side of the ventilation hole forming area in the front wall, and a filter for capturing dust and the like is removably housed in this filter housing section. More specifically, the filter accommodating portion has receiving grooves that face each other in the vertical direction. An engaging ridge protruding downward is formed at the indoor end of the upper receiving groove, and an engaging ridge protruding upward is formed at the indoor end of the lower receiving groove. The filter is removably attached to the device body by inserting the upper and lower edges of a filter cover that holds the filter into the upper and lower receiving grooves. The upper and lower edges of the filter cover engage with the engaging ridges, so the filter is held stably. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2020-8206 A DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0005] The filter cover has many ventilation holes and allows air to flow while covering the filter, which creates a large resistance to air flow, and therefore attempts have been made to further improve ventilation efficiency. [Means for solving the problem]

[0006] The present invention has been made to solve the above-mentioned problems, and provides a ventilation device comprising: a device main body having a front wall having an indoor ventilation port, a rear wall having an outdoor ventilation port, a ventilation passageway communicating with the indoor ventilation port and the outdoor ventilation port, and a filter housing section arranged on the indoor side of a ventilation port forming area in which the indoor ventilation port is formed in the front wall, and a filter that is detachably housed in the filter housing section and covers the ventilation port forming area, The filter accommodating portion has an upper receiving groove and a lower receiving groove arranged opposite each other in the vertical direction and which receive the upper and lower edge portions of the filter, respectively, an upper engagement protrusion protruding downward is formed at the indoor end of the upper engagement groove and a lower engagement protrusion protruding upward is formed at the indoor end of the lower engagement groove, a retaining member is removably attached to the below of the ventilation hole forming area on the front wall, and an upper portion of the retaining member is formed with a pushing portion which enters the lower receiving groove and engages with the lower engagement protrusion and pushes in the lower edge portion of the filter.

[0007] According to the above-described configuration, the filter can be stably held without using a filter cover, so that most of the filter is not covered, air flow resistance can be reduced, and ventilation efficiency can be improved.

[0008] Preferably, the retaining member has a flow guide wall protruding from the pushing portion toward the indoor side. According to this configuration, the flow guide wall guides the flow of air and also hides at least a portion of the filter from the occupant, thereby improving the appearance. More preferably, the flow guide wall has an inclined portion that slopes upward as it moves away from the front wall. With this configuration, the filter can be more reliably hidden from the occupant.

[0009] Preferably, the retaining member is a resin lower cover covering the area below the ventilation hole forming area in the front wall, an upper fitting portion is formed on the upper part of the lower cover to fit into the lower engagement protrusion, and the portion of the upper fitting portion on the lower receiving groove side is provided as the pushing-in portion. According to this configuration, the resin lower cover can prevent condensation. Also, the lower engaging ridge of the filter housing can be used as a structure for removably mounting the lower cover to the front wall.

[0010] Preferably, the filter further includes a resin upper cover that is separate from the lower cover and covers the area above the ventilation hole forming area in the front wall, and a fitting portion is formed on the lower edge of the upper cover to fit with the upper engagement protrusion, and the portion of this fitting portion on the upper receiving groove side is provided as a pressing portion that presses against the upper edge of the filter. With this configuration, the upper and lower plastic covers can reliably prevent condensation. The upper engagement ridge of the filter housing can be used as a structure for attaching the upper cover to the front wall. Furthermore, the upper edge of the filter is pressed by the pressing part of the upper cover, so the filter can be held in place even more stably.

[0011] In one aspect, the lower cover has a lower fitting portion positioned below the upper fitting portion, and is removably attached to the front wall by fitting the lower fitting portion into the lower edge of the front wall and using this lower edge as a fulcrum to move the lower cover closer to the front wall and engage the upper fitting portion with the lower engagement protrusion.

[0012] In another aspect, the lower cover has an engaging protrusion that is positioned below the upper engaging portion and protrudes downward, and an upward engaging groove is formed in the lower region of the front wall, and the lower cover is removably attached to the front wall by engaging the upper engaging portion with the lower engagement protrusion from above and engaging the engaging protrusion with the engaging groove from above. Effect of the Invention

[0013] According to the present invention, the ventilation efficiency of a ventilation device can be improved. [Brief description of the drawings]

[0014] [Figure 1] 1 is a cross-sectional view of a ventilation device according to a first embodiment of the present invention. FIG. [Diagram 2] FIG. 2 is a cross-sectional view of the ventilation device excluding the opening / closing mechanism and the filter. [Diagram 3] FIG. 3 is an enlarged cross-sectional view of a main part of FIG. 2. [Figure 4] FIG. 4 is a view corresponding to FIG. 2 and showing a ventilation device according to a second embodiment of the present invention. [Diagram 5] FIG. 5 is an enlarged cross-sectional view of a main part of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] <Ventilation device of the first embodiment> A ventilation device according to a first embodiment of the present invention will be described below with reference to Figures 1 to 3. The ventilation device of this embodiment is an integrated upper frame type, which also serves as the upper frame of a window screen (not shown), and both ends of which are connected to the upper ends of the left and right vertical frames of the window screen.

[0016] 1 and 2, the ventilation device includes a device body 1. The device body 1 of this embodiment is formed by assembling together a main mold member 10 and a sub-mold member 20, each of which is made of an aluminum extrusion material.

[0017] The main mold member 10 accounts for the majority of the device body 1 and has a vertically standing front wall 11 on the indoor side and a rear wall 12 on the outdoor side, and upper and lower horizontal walls 13, 14 spanning the front wall 11 and rear wall 12 approximately horizontally. The upper part of the front wall 11, the upper part of the rear wall 12, and the horizontal wall 13 form a rail swallowing section 15 that swallows the upper rail of the window frame. The lower part of the front wall 11, the lower part of the rear wall 12, and the horizontal wall 14 form a shoji body swallowing section 16 that swallows the glass shoji body (not shown) of the window shoji.

[0018] The secondary mold member 20 is provided as a part of the rear wall of the device body 1, and its upper and lower ends are connected to the main mold member 10 by fitting. The secondary mold member 20 has a large number of outdoor side ventilation openings 20a formed in the longitudinal direction.

[0019] The vertical intermediate portion of the front wall 11 is provided as a ventilation opening forming region 11x, and in this ventilation opening forming region 11x, a large number of indoor ventilation openings 11a are formed lined up in the longitudinal direction. The ventilation device has a ventilation passage 17 between the rail swallowing portion 15 and the screen body swallowing portion 16. The ventilation passage 17 communicates with the room through the ventilation opening 11a and communicates with the outside through the ventilation opening 20a.

[0020] The ventilation device is provided with an opening / closing mechanism 30 for opening and closing the ventilation passage 17. This opening / closing mechanism 30 has a known structure and will be described briefly. A bearing portion 11b is formed near the upper end of the ventilation opening forming area 11x of the front wall 11, and the upper end of the operating plate 31 is supported by this bearing portion 11b so as to be slidable in the longitudinal direction and rotatable. The operating plate 31 is connected to an operating member 32 arranged at one end of the device body 1 in the longitudinal direction via a connecting member 33. The connecting member 33 fixed to the operating member 32 enters a hole formed at the end of the operating plate 31 and is connected to the operating plate 31 so as to allow the operating plate 31 to rotate. By operating the operating member 32 to slide in the longitudinal direction, the operating plate 31 slides in the longitudinal direction, and during this sliding process, the operating plate 31 rotates due to the cam action between a cam follower (not shown) at the lower end of the operating plate 31 and a cam member (not shown) fixed to the device body 1, thereby opening and closing the ventilation opening 11a. Note that various known configurations can be adopted as the opening / closing mechanism.

[0021] A filter housing section 18 is disposed on the indoor side of the ventilation hole forming region 11x of the front wall 11. This filter housing section 18 has receiving grooves 18a, 18b that face each other in the vertical direction with the ventilation hole forming region 11x in between. An engaging ridge 18x that protrudes downward is formed at the indoor side end of the upper receiving groove 18a. An engaging ridge 18y that protrudes upward is formed at the indoor side end of the lower receiving groove 18b.

[0022] <Top and bottom covers> A filter 40 is removably housed in the filter housing portion 18 of the device body 1. No filter cover is used, and the filter 40 is held by an upper cover 50 and a lower cover 60 (holding members) each made of a different resin mold material. This will be described in detail below.

[0023] The upper cover 50 has fitting portions 51, 52 at its upper and lower ends, and is attached to the front wall 11 by fitting the fitting portion 51 at the upper end into the upper end of the front wall 11 and fitting the fitting portion 52 at the lower end into the upper engagement protrusion 18x of the filter accommodating portion 18. In this embodiment, the upper cover 50 is fixed to the front wall 11, but it may also be attached to the front wall 11 in a detachable manner.

[0024] The upper cover 50 covers the entire area above the ventilation hole forming area 11x in the front wall 11. A closed air layer 55 is formed between the front wall 11 and the upper cover 50. The portion of the fitting portion 52 on the receiving groove 18a side is provided as a pressing portion 52a that plays a role described later.

[0025] The lower cover 60 has a fitting portion 61 at its upper end and a fitting portion 62 at its lower end. The lower cover 60 is attached to the front wall 11 by fitting the fitting portion 61 into the engaging protrusion 18y of the filter accommodating portion 18 and fitting the fitting portion 62 into the lower end of the front wall 11. The lower cover 60 is detachable from the front wall 11 as described below.

[0026] The lower cover 60 covers the entire area below the ventilation hole forming area 11x in the front wall 11. A closed air layer 65 is formed between the front wall 11 and the lower cover 60. The portion of the fitting portion 61 on the receiving groove 18a side is provided as a pushing portion 61a that plays a role described later.

[0027] As described above, by covering the upper and lower areas of the filter housing portion 18 on the front wall 11 with the resin covers 50, 60, condensation on the device body 1 can be prevented.

[0028] A flow guide wall 66 that protrudes from the fitting portion 61 toward the indoor side and guides the flow of air is formed on the upper portion of the lower cover 60. This flow guide wall 66 can hide the filter 40 from the occupant's eyes, improving the appearance. Moreover, the flow guide wall 66 has an inclined portion that progresses upward as it moves away from the front wall 11, so that the effect of hiding the filter 40 can be further enhanced.

[0029] <Installing the filter> Next, a detailed description will be given of the process of attaching the filter 40 to the filter housing 18. The filter 40 is made of a large number of fibers and has elasticity in the thickness direction. The thickness of the filter 40 is approximately the same as the groove width of the receiving grooves 18a and 18b.

[0030] With the lower cover 60 removed from the device body 1, the filter 40 is accommodated in the filter accommodating section 18. At this time, the upper edge of the filter 40 is inserted while being compressed into the upper receiving groove 18a narrowed by the pressing section 52a of the upper cover 50, and the lower edge of the filter 40 is inserted into the lower receiving groove 18b. In this state, the upper edge of the filter 40 is pressed by the pressing section 52a of the upper cover 50, maintaining the compressed state, and is held firmly.

[0031] Next, the lower cover 60 is attached to the front wall 11. More specifically, the fitting portion 62 at the lower end of the lower cover 60 is fitted to the lower end of the front wall 11, and the lower cover 60 is rotated toward the front wall 11 with the lower end of the front wall 11 as a fulcrum (see the arrow in FIG. 2). Then, the pushing portion 61a of the lower cover 60 abuts against the lower engaging protrusion 18y of the filter accommodating portion 18, and overcomes the engaging protrusion 18y with the elastic deformation of the flow guide wall 66, and enters the lower receiving groove 18b with the elastic return of the flow guide wall 66, so that the fitting portion 61 of the lower cover 60 fits into the engaging protrusion 18y. At this time, as shown in FIG. 3, the inclined surface formed on the pushing portion 61a and the inclined surface formed on the engaging protrusion 18y come into contact with each other, so that the pushing portion 61a can smoothly overcome the engaging protrusion 18y.

[0032] In the above-described attached state of the lower cover 60, the pushing portion 61a of the lower cover 60 pushes in the lower edge portion of the filter 40 inserted in the receiving groove 18b, so that the filter 40 is held in a compressed state. In addition, since the pushing portion 61a of the lower cover 60 is engaged with the engaging protrusion 18y, the attached state of the lower cover 60 can be maintained.

[0033] As described above, the filter 40 is held in a compressed state at the upper and lower edges, and is therefore stably held in the filter accommodating portion 18. Since the filter 40 is not covered with a filter cover as in conventional ventilation devices, there is no need to invite an increase in air resistance due to a filter cover, and ventilation efficiency can be improved.

[0034] <Removing the filter> When replacing the filter 40, the lower cover 60 is pulled upward and rotated in a direction away from the front, using the lower end of the front wall 11 as a fulcrum, to disengage the fitting portion 61 from the lower engaging protrusion 18y, and the lower cover 60 is removed from the device body 1. Next, the lower edge of the filter 40 is grasped and pulled out from the filter housing portion 18.

[0035] <Ventilation device of second embodiment> Next, a ventilation device according to a second embodiment of the present invention will be described with reference to Figures 4 and 5. In this embodiment, components corresponding to those in the first embodiment are given the same reference numerals and detailed descriptions thereof will be omitted.

[0036] This embodiment differs from the first embodiment only in the mounting structure of the lower cover 60. More specifically, an upwardly facing fitting groove 69 defined by an L-shaped protruding piece is formed in the area below the ventilation hole forming area 11x in the front wall 11. On the other hand, a downwardly facing fitting protrusion 19 is formed at the tip of the L-shaped protruding piece in the lower cover 60.

[0037] <Installing the filter> As in the first embodiment, the filter 40 is accommodated in the filter accommodating portion 18. Next, as shown by the arrow in Fig. 4, the lower cover 60 is brought close to the front wall 11 and then moved downward, so that the upper fitting portion 61 fits into the lower engagement ridge 18y of the filter accommodating portion 18, and the fitting ridge 69 fits into the fitting groove 19. In this manner, the lower cover 60 can be attached with a simple operation. The pushing portion 61a of the fitting portion 61 pushes in the lower edge portion of the filter 40, as in the first embodiment.

[0038] As shown in Figure 5, a convex portion 18p that protrudes toward the outside of the room is formed at the upper end of the engagement protrusion 18y, and a convex portion 61p that protrudes toward the inside of the room is formed at the lower end of the push-in portion 61a. The engagement of these convex portions 18p, 61p prevents the lower cover 60 from moving upward inadvertently.

[0039] <Removing the filter> When removing the filter 40 for replacement, the lower cover 60 is moved upward in the opposite direction to the above to disengage the fitting portion 61 from the engaging ridge 18y and the fitting ridge 69 from the fitting groove 19, thereby removing the lower cover 60 from the device body 1. Thereafter, the lower edge of the filter 40 is grasped and pulled out from the filter accommodating portion 18 in the same manner as in the first embodiment.

[0040] The present invention is not limited to the above-described embodiment, and various other embodiments can be adopted. The material and characteristics of the filter are not limited to those in the above embodiment, and various types can be used. For example, the filter may be made of an insect screen that prevents insects from entering. The filter may also be made of a material that prevents the intrusion of fine particles such as pollen. The filter may also contain a deodorizer or fragrance. The number and materials of the molded parts of the ventilation device are not limited to those in the above-described embodiment, and various types can be adopted. The retaining member may not serve as a lower cover that covers the area below the ventilation hole formation area of ​​the front wall, but may simply serve to be detachably attached to the front wall and to press in the lower edge of the filter. The retaining member does not have to be made of resin.

[0041] The resin upper cover may be attached to the front wall without being fitted with the upper engaging ridge. In this case, it is preferable to narrow the groove width of the upper receiving groove so that the upper edge of the filter is inserted in a compressed state. The upper cover may be omitted. In this case, it is preferable to form a mold including the upper region of the front wall of the device body from a resin material.

[0042] The ventilation device of the present invention can also be applied to a separate upper frame type. In this case, a portion for inserting the window frame is formed on the lower side, and a fitting portion that fits into the upper frame of the window frame is formed on the upper side. [Industrial Applicability]

[0043] The present invention can be applied to a ventilation device incorporated in a window screen or the like. [Explanation of symbols]

[0044] 1. Device body 11 Front wall 11a Indoor ventilation opening 11x ventilation vent forming area 12 Back wall 17 Ventilation Passage 18 Filter housing 18a Upper receiving groove 18b Lower receiving groove 18x Upper engagement protrusion 18y lower engagement protrusion 19 Fitting groove 20 Sub-form material (back wall) 20a Outdoor ventilation opening 50 Top cover 51,52 Fitting part 52a Pressing part 60 Lower cover (retaining member) 61,62 Fitting part 61a Push-in part 66 Distribution Guide Wall 69 Mating protrusion

Claims

1. an apparatus main body having a front wall having an indoor ventilation port, a rear wall having an outdoor ventilation port, a ventilation passageway connected to the indoor ventilation port and the outdoor ventilation port, and a filter housing section arranged on the indoor side of a ventilation port forming area in which the indoor ventilation port is formed in the front wall; A filter that is detachably accommodated in the filter accommodating portion and covers the ventilation hole forming area; In a ventilation device comprising: The filter accommodating portion has an upper receiving groove and a lower receiving groove that are arranged opposite each other in the vertical direction and receive the upper and lower edge portions of the filter, respectively, and an upper engaging protrusion that protrudes downward is formed at the indoor end of the upper engaging groove, and a lower engaging protrusion that protrudes upward is formed at the indoor end of the lower engaging groove, A ventilation device characterized in that a retaining member is removably attached to the front wall below the ventilation hole forming area, and a pushing portion is formed on the upper part of the retaining member which fits into the lower receiving groove, engages with the lower engagement protrusion, and pushes in the lower edge of the filter.

2. The ventilation device according to claim 1 , wherein the holding member has a flow guide wall that protrudes from the pushing portion to the indoor side.

3. 3. The ventilation device according to claim 2, wherein the flow guide wall has an inclined portion that slopes upward as it moves away from the front wall.

4. The ventilation device described in claim 1, characterized in that the retaining member is a resin lower cover that covers the area below the ventilation hole forming area in the front wall, an upper fitting portion that fits into the lower engagement protrusion is formed on the upper part of the lower cover, and a portion of the upper fitting portion on the lower receiving groove side is provided as the pushing-in portion.

5. The ventilation device described in claim 4 further comprises an upper cover made of resin that is separate from the lower cover and covers the area above the ventilation hole forming area in the front wall, a fitting portion that fits with the upper engagement protrusion is formed on the lower edge of the upper cover, and the portion of this fitting portion on the upper receiving groove side is provided as a pressing portion that presses the upper edge of the filter.

6. The ventilation device according to claim 4, wherein the lower cover has a lower fitting portion disposed below the upper fitting portion, and the lower cover is removably attached to the front wall by fitting the lower fitting portion into the lower edge of the front wall and using this lower edge as a fulcrum to move the lower cover closer to the front wall and fit the upper fitting portion into the lower engagement protrusion.

7. the lower cover has a fitting protrusion disposed below the upper fitting portion and protruding downward, and an upward fitting groove is formed in the lower region of the front wall, The ventilation device according to claim 4, characterized in that the lower cover is removably attached to the front wall by fitting the upper fitting portion into the lower engagement protrusion from above and fitting the engagement protrusion into the engagement groove from above.

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