JP6719814B2 - Louver ventilation system - Google Patents

Description

The present invention relates to a louver ventilation device that is externally attached to an electrical equipment storage box or the like.

2. Description of the Related Art Conventionally, an electric device storage box installed outdoors is provided with a louver ventilation device with a hood that ensures dustproof and waterproof performance of a ventilation port provided in a housing. For example, Patent Document 1 discloses a structure of a hood having a rear opening portion larger than a ventilation portion of the louver so as not to prevent ventilation of the louver. Then, in order to prevent water from entering the housing through the joint between the hood and the louver, waterproofing measures such as packing are provided around the rear opening of the hood.

Japanese Utility Model Publication No. 06-13304

However, when strong wind and rain such as a storm is blown to the louver, the rainwater may pass through the louvers (blades) and reach the back surface of the louver or the filter. Then, for example, the water contained in the filter may be transmitted to the back surface of the louver and flow down, and may enter the inside of the housing.

Therefore, an object of the present invention is to provide a louver ventilation device that effectively prevents such water reaching the back surface of the louver from entering the inside of the housing of the electrical device storage box.

To solve the above problems, the present invention may possess an opening corresponding to the ventilation openings of electrical equipment storage box housing, a base member attached to the outer surface of the housing, the outer to the opening of the base member A louver ventilation device including a louver unit attached to the louver unit and a filter interposed in the louver unit so as to cover the opening, and a support frame portion that internally supports the filter on the back side of the louver unit. forming a, the lower end of the opening of the base member, characterized in that a water stop portion which rises at a predetermined interval with respect to the support frame portion.

According to the louver ventilation device having this configuration, the water stop portion provided at the lower end of the opening portion of the base member can prevent the water transmitted on the back surface of the louver unit from entering the housing side.

In the louver ventilation device having the above-mentioned configuration, it is preferable that an upper end of the water shut off portion is provided with an inclined surface that is inclined downward toward the louver unit.

According to this configuration, the water attached to the water blocking portion travels down the inclined surface and flows down to the louver unit side, so that it is possible to more effectively prevent water from entering the housing side.

Further, it is preferable that the water blocking portion is formed outside or on the same surface as a mounting surface of the base member to the housing.

According to this configuration, the water stop portion does not interfere when an internal device such as a fan (not shown) is attached to the ventilation device.

It is preferable that at least the left and right outer edges of the opening of the base member have a chamfered shape that widens toward the louver unit.

According to this configuration, since the vertical groove is formed between the edge of the opening of the base member and the louver unit, it is possible to collect water droplets in the vertical groove and allow the water droplet to flow down. Therefore, infiltration of water can be prevented more effectively.

According to the louver ventilation device of the present invention, it is possible to effectively prevent water from entering the inside of the housing of the electric device storage box along the back surface of the louver unit.

It is the perspective view which looked at the louver ventilation device from the upper front. It is the perspective view which looked at the louver ventilation device from the back upper part. It is an exploded perspective view of a louver ventilation device. It is the perspective view which looked at the cover member from the back upper part. It is the perspective view which looked at the base member from the front upper part. It is the perspective view which looked at the louver unit from the upper front. It is the perspective view which looked at the louver unit from the back upper part. It is a perspective view showing a longitudinal section which cut a part of base member and a louver unit. It is a figure which expands and shows a part of cross section of FIG. It is a perspective view showing a transverse section which cut a part of base member and a louver unit. It is a figure which expands and shows the inside of the circle of FIG.

A preferred embodiment of a louver ventilation device according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a louver ventilation device 10 according to an embodiment of the present invention, as seen from the front upper side. FIG. 2 is a perspective view of the louver ventilation device 10 viewed from the upper rear side. FIG. 3 is an exploded perspective view of the louver ventilation device 10. The louver ventilation device 10 is attached to a ventilation port of an electric equipment storage box installed outdoors or the like, and includes a hood-shaped cover member 20 for preventing wind and rain and dust from being blown into the housing.

As shown in FIG. 3, the base member 30 is a mounting substrate that is mounted on the outer surface of the housing 90 of the electrical device storage box. A waterproof packing 60, for example, is interposed between the base member 30 and the housing 90. In this embodiment, the louver unit 40 that holds the filter 50 is provided on the front surface (corresponding to the outside) of the base member 30, and the cover member 20 that covers the louver unit 40 is detachably attached to the base member 30 from the front. .. The filter 50 is interposed in the louver unit 40 at a position that covers the opening 31 of the base member 30.

The back side of the cover member 20 is attached to the base member 30 by engaging the front side of the base member 30. Here, FIG. 4 shows the structure on the back side of the cover member 20, and FIG. 5 shows the structure on the front side of the base member 30.

The cover member 20 is a member integrally formed of, for example, a synthetic resin, has a top plate portion 20a, side plate portions 20b, 20b, and a front inclined plate portion 20c, and has a so-called hood shape in which the back side and the lower side are open. have. When the cover member 20 is attached so as to cover the opening of the base member 30, a ventilation member surrounded by the left side plate portion 20b, the front inclined plate portion 20c, the right side plate portion 20b and the base member 30 is provided at the lower portion of the cover member 20. An opening is defined.

Fitting recesses 22 and 22 are formed in the lower rear end corners of the side plate portions 20b and 20b of the cover member 20, respectively. The fitting recess 22 has a shape in which a part of the side surface and a part of the front surface of the side plate portion 20b are cut out in a square shape. Further, the side plate portions 20b, 20b of the cover member 20 are formed with protruding pieces 23, 23 that are adjacent to the fitting recesses 22, 22 and project toward each other into the open portion 21.

Reinforcing ribs 24 are formed on the inner wall of the cover member 20 so as to project over the left side plate portion 20b, the front inclined plate portion 20c, and the right side plate portion 20b. The reinforcing rib 24 is formed at a height position corresponding to the height of the protruding piece 23 from the lower end of the cover member 20. The ends of the reinforcing ribs 24 are not connected to the projecting pieces 23, 23, and a gap 25 is provided between them. The reinforcing ribs 24 as described above ensure the strength of the entire cover member 20 and allow elastic deformation of the side plate portions 20b, 20b to some extent when pressed when the cover member 20 is attached and detached as described later.

The base member 30 is made of a synthetic resin member having a substantially trapezoidal mounting plate portion 32 having an opening 31 for ventilation in the center. Fitting protrusions 33, 33 are formed on the lower portions of the left and right ends of the base member 30. The cover member 20 is detachably attached to the base member 30 by engaging the fitting convex portions 33, 33 with the fitting concave portions 22, 22 formed at the corners of the side plate portions 20b, 20b of the cover member 20. To be done.

Further, the base member 30 is formed with a flange-shaped guide portion 34 that guides the projection pieces 23, 23 of the cover member 20 described above. The guide part 34 faces the front side of the mounting plate part 32 along the side and the upper side of the mounting plate part 32 and faces them with a certain distance therebetween. Both left and right lower ends of the guide portion 34 are connected to a bottom plate portion (covering portion) 35 of the base member 30, and the connecting portions serve as restriction pieces 36, 36.

At the mounting position where the fitting projections 33, 33 of the base member 30 are engaged with the fitting recesses 22, 22 of the cover member 20, the projection pieces 23, 23 of the cover member 20 are aligned with the restriction pieces 36 of the base member 30, It is locked to 36. Therefore, the forward movement of the cover member 20, that is, the removal thereof is restricted.

Further, in the guide portion 34, cutout portions 37, 37 are formed at positions above the restriction pieces 36, 36 and slightly above the fitting protrusions 33, 33.

At two locations around the opening 31 of the base member 30, locking pieces 38, 38 having hook-shaped barbs at their ends are formed to project so as to temporarily fix the louver unit 40. Further, screw holes 39, 39 for fixing the base member 30 together with the temporarily fixed louver unit 40 to the housing 90 of the electrical device storage box with screws 91, 91,... At four corners around the opening 31. ... are formed.

FIG. 6 is a perspective view of the louver unit 40 as viewed from the front upper side. FIG. 7 is a perspective view of the louver unit 40 seen from the upper rear side. The louver unit 40 has a plurality of louvers (blades) 41 on the front side, and the filter 50 is supported inside by a support frame portion 42 on the back side. Insert nuts 43, 43,... Are formed at four corners on the back surface of the louver unit 40.

A method of attaching the louver ventilation device 10 having the above configuration to the housing 90 of the electric device storage box will be described.

(Installation of base member)
First, by inserting the screw 92 from the front into the screw hole 80 of the base member 30 and screwing the screw 92 into the tap hole 93 of the housing 90, the base member 30 is screwed to the housing 90 from the outside.

(Installation of louver unit)
Next, the back side of the louver unit 40 is locked to the locking pieces 38, 38 of the base member 30 and temporarily fixed, and a plurality of (four) screws 91 are screwed into the housing 90 from inside. The louver unit 40 and the base member 30 are firmly fastened to the housing 90 at the same time by inserting the louver unit 40 and the base member 30 into the insert nut 43 of the louver unit 40.

In the state where the louver unit 40 is temporarily fixed to the base member 30, the base member 30 is temporarily fixed to the housing 90 from the outside with a screw 92, and then the louver unit 40 and the base are screwed from the inside of the housing 90 with a screw 91. The member 30 may be permanently fastened to the housing 90.

(Installing the cover member)
In order to mount the cover member 20 on the base member 30, first, the protruding pieces 23, 23 of the cover member 20 are placed inside the guide portion 34 through the outside of the cutout portions 37, 37, and the side plate portions 20b, 20b are pressed. Then, the cover member 20 is moved downward while being bent inward. Then, by releasing the pressure at the mounting position where the lower portion of the cover member 20 and the bottom plate portion (cover portion) 35 of the base member 30 abut, the fitting convex portion 33 and the fitting concave portion 22 engage with each other, whereby the cover The member 20 is easily attached to the base member 30.

FIG. 8 is a perspective view showing a vertical cross section in which a part of the base member 30 and the louver unit 40 is cut. FIG. 9 is an enlarged view showing a part of the cross section.

In the present embodiment, a water stop portion 71 that rises at a predetermined interval facing the inner side surface of the filter 50 is provided at the inner lower end of the opening 31 of the base member 30. If the filter 50 housed in the louver unit 40 contains water due to rainwater or dew condensation, it may be transmitted to the support frame portion 42 on the back surface of the louver unit 40 and flow down. In the present embodiment, the water blocking portion 71 that rises at a distance from the support frame portion 42 can block the water transmitted on the back surface of the support frame portion 42 and prevent the water from flowing to the housing 90 side. The water dammed by the water stop portion 71 is returned to the filter 50 by the return portion 73. Since the lower part of the louver unit 40 is the drainage channel 44 inclined outward, the water dropped from the filter 50 is drained to the outside through the drainage channel 44.

Further, as shown in FIG. 9 in particular, an inclined surface 72 is formed at the upper end of the water blocking portion 71 so as to be inclined downward toward the louver unit 40. As a result, water attached to the water blocking portion 71 flows down to the louver unit 40 side, and it is possible to more effectively prevent water from entering the housing 90 side.

Further, the water blocking portion 71 is formed outside or on the same surface as the mounting surface 30 a of the base member 30 to the housing 90. As a result, even when an internal device such as a fan (not shown) is placed inside the housing 90 and the base member 30 and the internal device are fastened together to the housing 90 via the screw holes 39, 39,... The water blocking portion 71 does not interfere with the internal equipment mounted inside the housing 90.

FIG. 10 is a perspective view showing a cross section in which a part of the base member 30 and the louver unit 40 is cut. FIG. 11 is an enlarged view showing a cross section within a circle in FIG. 10. As shown in these drawings, in the present embodiment, at least both left and right outer edges of the opening 31 of the base member 30 have a chamfered shape 31a that widens toward the louver unit 40. As a result, a V-shaped vertical groove is formed between the left and right outer edges of the opening 31 and the frame of the louver unit 40, and water droplets can be collected and flowed down into the groove. Therefore, it is possible to more effectively prevent water from entering the housing 90 side.

10 Louver ventilation device 20 Cover member 21 Opening portion 22 Fitting concave portion 23 Projecting piece 24 Reinforcing rib 30 Base member 31 Opening portion 32 Mounting plate portion 33 Fitting convex portion 34 Guide portion 35 Bottom plate portion 36 Restricting piece 37 Cutout portion 38 Engagement Stop piece 39 Screw hole 40 Louver unit 41 Roughly 42 Support frame part 43 Insert nut 44 Drainage channel 50 Filter 60 Packing 71 Water stop part 72 Inclined surface 90 Housing

Claims (4)

Have a opening corresponding to the ventilation openings of electrical equipment storage box housing, a base member attached to the outer surface of the housing, a louver unit attached from the outside to the opening of the base member, the opening A louver ventilation device comprising a filter inserted in the louver unit so as to cover,
On the back side of the louver unit, a support frame that supports the filter inside is formed,
A louver ventilation device, wherein a water stop portion that rises at a predetermined interval from the support frame portion is provided at a lower end of the opening of the base member. The louver ventilator according to claim 1, wherein an inclined surface that is inclined downward toward the louver unit is formed at an upper end portion of the water stop portion. The louver ventilator according to claim 1 or 2, wherein the water stop portion is formed outside or on the same surface as a mounting surface of the base member to the housing. The louver ventilation device according to any one of claims 1 to 3, wherein at least the left and right outer edges of the opening of the base member have a chamfered shape that widens toward the louver unit.