JP4423019B2 - Natural air inlet - Google Patents

Description

  The present invention relates to a natural air inlet that is installed on a wall of a building and supplies air to a negative pressure in a room generated by exhaust air from a ventilation fan or the like.

  As shown in FIG. 5, the conventional natural air supply port includes a supercharge prevention shutter A22 rotatably supported by a single cylinder A21, and the supercharge prevention shutter A22 is formed of a resin material or the like. However, there is no opening A23 between the outer cylinder A21a and the inner cylinder A21b and the supercharge prevention shutter A22 is formed of stainless steel or the like. .

  As a typical example of the shutter structure, the lower portion of the supercharge prevention shutter A22 is bent 25, the opening 23 is provided so that the target air volume can be secured, and the air supply 24 amount is secured from the opening 23. It is.

  Further, when negative pressure is generated in the room due to exhaust from a ventilating fan or the like, the supercharging prevention shutter a22 is easily closed. Therefore, a supercharging prevention shutter formed of a resin material or the like is provided to secure a supply balance. A weight is attached to a22 to prevent the supercharged air prevention shutter a22 from being easily closed by the dead weight of the shutter.

  Further, the one formed of stainless steel or the like is balanced such that the folding 25 is enlarged for the purpose of preventing the supercharging prevention shutter a22 from being easily closed.

  The natural air inlet is disclosed in Patent Document 1, for example.

JP 2001-241747

  As described above, since the conventional natural air inlet is provided with other parts such as a weight, the product cost is increased, the problem that it cannot be supplied on the market at low cost, and the lower part of the supercharger prevention shutter a22 is largely bent to the outside of the main body wall. The embedding dimension (F dimension) also increases, and when used in combination with a deep hood 27 with a rain return 26 that is installed outdoors, the supercharged air prevention shutter a22 bent 25 part is the rain return of the deep hood 27. The panel opening 28 that covers the cylindrical body a21 from the indoor side due to the problem that it cannot be attached to a thin walled house because it abuts the 26 part, or the opening a23 of the supercharging prevention shutter a22 alone is insufficient. It is necessary to increase the size (H dimension), and the panel 29 cannot be thinned, and the panel 29 dimension (J dimension) that travels indoors from the wall surface increases. There was a problem.

  In addition, when the outside wind is remarkably large, a whistling phenomenon may occur in the gap between the shutters where the cylinder a21 is closed.

An object of the present invention is to provide a natural air supply port which can secure a sufficient air supply amount and can be thinned to cover a panel covering the cylinder from the indoor side, thereby improving the interior property.

It is a further object of the present invention, the whistle sounding phenomenon caused by blowing a strong wind in the narrow portion gap in the prior art is to provide an anti-Ida natural air inlet.

In order to achieve the above object, the present invention is characterized in that in the natural air supply port provided with a cylindrical body that is inserted into and fixed to an opening provided in the outer wall and communicates between the room and the outside, the two large and small A cylindrical body comprising a concentric arc or an eccentric arc , and an outer cylindrical body that is one of the two large and small cylindrical bodies and an inner surface that is the other of the two large and small cylindrical bodies; An opening is provided on each of the inner surfaces of the inner cylinder, and the inner cylinder extends from the indoor side end of the outer cylinder toward the side opposite to the indoor side, and the indoor side of the inner cylinder The vertical dimension in the vertical direction at the end opposite to the vertical direction is longer than the horizontal dimension, and the outer cylinder is shorter than the vertical dimension of the inner cylinder and opposite to the indoor side of the inner cylinder. in further comprising a supercharged air preventing shutter which is rotatably supported on the end portion of the side

  In addition, the present invention is characterized by the fact that the inner cylindrical body has its weight in the vertical direction with respect to the support shaft of the supercharging prevention shutter that is held in a posture substantially perpendicular to the center line of the cylindrical body. The top dimension is formed so as to be inclined by about 25 ° as much as possible than the ground dimension.

  Further, the present invention is characterized in that the supercharging prevention shutter is formed of a steel plate material, a stainless steel material or the like.

  According to the present invention, the two large and small cylinders are provided in a concentric arc shape or an eccentric arc shape, and openings are provided between the outer cylinder and the inner cylinder between the inner cylinder inner face and the inner cylinder inner face. Has a cylinder structure with an overcharge prevention shutter that is pivotally supported, so that a sufficient amount of air supply can be secured, and the panel covering the cylinder can be made thinner from the indoor side. The interior can be improved.

  In addition, it is possible to prevent a whistling phenomenon caused by a strong wind blowing into the narrow gap in the prior art.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of a natural air inlet according to an embodiment of the present invention, FIG. 2a is a front view of the natural air inlet when the open / close shutter is opened, and FIG. 2b is a view when the open / close shutter is closed. It is a natural air inlet front view which shows.

  In FIG. 1 and FIG. 2, the two large and small cylinders 2 are concentric arcs at a natural air supply port provided with a cylinder 2 that is inserted and fixed in an opening provided in the outer wall 1 and communicates between the room and the outdoor. Alternatively, the cylindrical body 2 is formed so as to be provided in an eccentric arc shape, provided with a fixing screw insertion hole 4 in the frame 3 provided with the cylindrical body 2, and doubled on the outer side and the inner side.

  The two cylindrical bodies 2 are formed in an outer cylindrical body 2a and an inner cylindrical body 2b, and are used for communicating a supply air flow from the outdoor to an intermediate surface of the outer cylindrical body 2a and the inner cylindrical body 2b and an inner surface of the inner cylindrical body 2b. An opening 5 is provided, and the inner cylinder 2b is provided with a supercharged air-preventing shutter 6 made of a steel plate or stainless steel that is rotatably supported.

  Further, the vertical dimension of the cylindrical body 2 in the vertical direction with respect to the support shaft 7 of the supercharging prevention shutter 6 that is held in a posture substantially perpendicular to the center line of the cylindrical body by the weight of the inner cylindrical body 2b. It is formed so as to be formed at an angle of about 25 ° (A dimension) as much as possible longer than the ground direction dimension.

  On the other hand, on the indoor side of the frame 3, there is provided an open / close shutter instruction unit 8 that can be closed when an outside wind such as a typhoon is strong or when it feels chilly due to air supply in winter, and the open / close shutter instruction unit Reference numeral 8 also serves as a stopper 10 for a slide opening / closing shutter 9 which will be described later.

  Further, a box rib 11 is provided to indicate an outside air cleaning filter 12 for removing sand dust, pollen and the like mixed in the supply air flow, and an outside air cleaning filter 12 drop prevention rib 13 is provided at the tip of the rib 11. ing.

  Further, the openings 5 for communicating the air supply air from the outside are formed in a lattice shape 14 between the outer cylinder 2a and the inner cylinder 2b and the inner surface of the inner cylinder 2b.

  The opening / closing shutter 9 is provided with an opening 15 having the same diameter as the inner size of the outer frame 2a of the frame 3 and is formed in a grid 14 with the same width as the opening 5 formed in the frame 3 opening 5. A shutter opening / closing knob 16 is provided below the shutter 9 and is opened by sliding the opening / closing shutter 9 through the lattice opening 5 formed in the frame 3 and the lattice opening 15 formed in the opening / closing shutter 9. At the time (left figure in FIG. 2), the grid-like opening 15 overlaps with the grid-like opening 5 with the same width as the opening 5 formed in the frame 3 cylinder opening 5, and the air supply air flows into the room.

  When closed, the grid openings 15 have the same width as the openings 5 formed in the frame 3 cylinder openings 5 and alternate with the grid openings 5, thereby preventing the supply air flow from flowing into the room.

  Further, a panel 17 that covers the frame 3, the opening / closing shutter 9, and the outside air cleaning filter 12 is provided on the indoor side, and is configured to be detachable by fitting the frame 3 and the claw 18.

  In such a natural air supply port, as shown in FIG. 3, the two large and small cylinders 2 are provided in a concentric arc shape or an eccentric arc shape, and an intermediate surface and an inner cylinder between the outer cylinder body 2a and the inner cylinder body 2b. An opening 5 is provided on the inner surface of the body 2b, and the inner cylinder 2b is provided with a supercharge prevention shutter 9 which is instructed to rotate freely, and the inner cylinder 2b is directed by the self-weight and vertical supercharge prevention shutter 9 When the supercharger prevention shutter 9 is opened by its own weight, it is cut at an angle of about 25 ° with respect to the shaft. When the supercharger prevention shutter 9 is opened by its own weight, the inner cylinder 2b A sufficient supply air flow 20 flows into the interior from the opening 5 on the inner surface, and the inner cylinder 2b is held by its own weight on the support shaft of the supercharge prevention shutter 9 held in a posture substantially perpendicular to the center line of the cylinder. On the other hand, the vertical dimension of the cylinder in the vertical direction is approximately 2 as long as possible to be longer than the horizontal dimension. ° (A dimension) sufficient air supply 20 by forming such that the oblique shape is easy to structure flow into the chamber.

  In addition, since the supercharging prevention shutter 9 is formed of a steel plate material or stainless steel material, even when the amount of negative pressure in the room is small, it is easy to prevent supercharging air due to the weight of the steel plate material or stainless steel material. A stable supply of air 20 can be secured without closing the shutter 9.

  As a result, it is possible to supply the product at a low cost to the product such as the 9 resin material and the weight attached to the lower portion of the supercharge prevention shutter.

  As shown in FIG. 4, when the amount of negative pressure generated by the exhaust air from the ventilation fan or the like is large, the supercharging prevention shutter 9 is completely sealed, but the surface between the outer cylinder 2 a and the inner cylinder 2 b. Since the opening 5 is provided, the air supply amount can be secured, the air supply amount can be secured while preventing the supercharged air due to the mandatory ventilation, and the supercharged air prevention shutter 9 is completely sealed. Therefore, it is not necessary to form a bent portion at the lower portion of the supercharging prevention shutter 9 and provide an opening, and the depth dimension (B dimension <F) includes the supercharging prevention shutter 9 and the cylinder 2. (Dimension) can be shortened so that the structure can be installed in a thin-walled house (E dimension <G dimension).

  Further, the airtightness of the supercharging prevention shutter 9 is required to be tight, and the panel opening 19 that covers the cylinder 2 from the indoor side is insufficient because only the area of the folding opening at the lower part of the supercharging prevention shutter 9 is insufficient. However, since the opening 5 is provided between the outer cylinder 2a and the inner cylinder 2b, the air supply amount can be secured and the indoor panel opening 19 is narrow (C dimension < Since the performance can be ensured even in the case of (H dimension), the interior can be improved by thinning the panel 17 (D dimension <J dimension).

  In addition, it is possible to prevent a whistling phenomenon caused by a strong wind blowing into the narrow gap. With the goal.

  Furthermore, by applying a photocatalyst to the panel 17, it is difficult to get dirty even after installation in a house, and customer maintenance becomes easy.

It is longitudinal direction sectional drawing in the natural air inlet of embodiment of this invention. It is a natural air inlet front view which shows the time of opening and closing shutters except the panel and the outside air cleaning filter of the embodiment of the present invention. It is longitudinal direction sectional drawing which shows the flow of the air supply air in the natural air inlet of embodiment of this invention. It is a longitudinal direction sectional view showing the flow of air supply air at the time of air-tightening prevention shutter sealing in the natural air inlet of the embodiment of the present invention. It is longitudinal direction sectional drawing which shows the conventional natural air inlet.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Outer wall, 2 ... Cylindrical body, 2a ... Outer cylindrical body, 2b ... Inner cylindrical body, 3 ... Frame, 4 ... Screw insertion hole round hole, 5 ... Opening part, 6 ... Supercharging prevention shutter, 7 ... Support shaft , 8 ... Opening / closing shutter instruction part, 9 ... Opening / closing shutter, 10 ... Stopper, 11 ... Box rib, 12 ... Outside air cleaning filter, 13 ... Fall-off prevention rib, 14 ... Lattice-like, 15 ... Lattice-like opening, 16 ... Opening / closing knob, 17 ... Panel, 18 ... Claw, 19 ... Panel opening, 20 ... Air supply, 21 ... Cylinder A, 21a ... Outer cylinder A, 21b ... Inner cylinder A, 22 ... Preventing supercharging Shutter A, 23 ... opening A, 24 ... air supply, 25 ... bent, 26 ... rain return, 27 ... deep hood, 28 ... panel opening, 29 ... panel.

Claims (6)

In the natural air inlet provided with a cylindrical body that is inserted into and fixed to the opening provided in the outer wall and communicates between the room and the outside,
A cylindrical body composed of two large and small cylinders is provided in a concentric arc shape or an eccentric circular arc shape, and between the outer cylindrical body that is one of the two large and small cylindrical bodies and the inner cylindrical body that is the other of the two large and small cylindrical bodies. an opening is provided on each side and the inner surface of the inner tubular body,
The inner cylinder extends from the end on the indoor side of the outer cylinder toward the side opposite to the indoor side, and the vertical dimension in the vertical direction at the end on the side opposite to the indoor side of the inner cylinder. Is longer than the ground dimension,
The outer cylinder is shorter than the top dimension of the inner cylinder,
A natural air inlet comprising an overcharge prevention shutter rotatably supported at an end of the inner cylinder opposite to the indoor side . In claim 1,
By its own weight and the inner tubular body, relative to the support shaft of the supercharged air prevention shutter is held in a substantially vertical position to the center line of the cylindrical body, the top dimension is about as long as possible than the land dimension 25 ° Natural air inlet characterized by an oblique shape. In claim 1 or 2,
A natural air supply opening provided with an open / close shutter supported to be openable and closable from a room on the indoor side of a cylindrical opening that communicates between the room and the outdoors. In any one of Claims 1 thru | or 3,
A natural air supply opening provided with an outside air cleaning filter on the indoor side of the cylindrical opening. In any one of Claims 1 thru | or 4,
A natural air supply opening characterized in that the supercharge prevention shutter is formed of a steel plate material, a stainless steel material or the like. In any of claims 1 to 5,
A natural air supply opening characterized in that a panel or grill is provided to cover the cylinder from the indoor side, and a photocatalytic material is applied to the panel or grill.

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