JP4549641B2 - Ventilation hood - Google Patents

Description

  The present invention relates to an improvement of a ventilation hood used for a ventilation opening provided on a wall surface of a building.

  As shown in FIG. 1 of Japanese Patent Laid-Open No. 9-264578, the conventional ventilation hood is provided with openings on the left and right side surfaces and the lower surface of the hood portion, and the openings on the left and right side surfaces are vertically provided with a louver. The air is exhausted in the direction of the same angle of about 20 degrees from the surface parallel to the wall surface.

JP-A-9-264578 (FIGS. 1 and 2)

  In the conventional ventilation hood disclosed in Japanese Patent Application Laid-Open No. 9-264578, in the gallery 16 and 18 shown in FIG. 2, the distance from the wall surface to the gallery where air is exhausted is used to prevent contamination of the wall surface by the air exhausted from the room. In order to provide, the hood part 12 is provided. In this case, since the size from the wall surface to the tip of the ventilation hood is large and the ventilation hood protrudes greatly from the wall surface, there are problems such as a bad appearance of the building and a problem that the ventilation hood main body becomes large.

  Further, even when the ventilation hood is downsized, it is necessary to prevent the air exhausted from the room from getting dirty in order to maintain the beauty of the wall surface after passing through the ventilation hood.

A ventilation hood according to the present invention includes a flange attached to an outdoor side of a ventilation opening provided on a wall surface of a building, a wind guide cylinder having one end connected to the flange and a wind / rain prevention plate connected to the other end. A plurality of ventilation holes formed on the outer periphery of the wind guide cylinder, and a plurality of louvers are provided by cutting and raising the wind guide cylinder corresponding to the ventilation holes. A ventilation hood that is inclined and protrudes outside the cylindrical body, and among the plurality of galleys, the louver on the most indoor side forms a predetermined acute angle with the outer peripheral surface of the wind guide cylindrical body, The louver disposed on the outdoor side rather than the inner louver has an acute angle larger than the predetermined acute angle.

According to the present invention , among the plurality of louvers, the louver on the most indoor side forms a predetermined acute angle with the outer peripheral surface of the wind guide cylinder, and the louver disposed closer to the outdoor side than the louver on the most indoor side. Since the air angle is larger than the predetermined acute angle, the air blown out from the indoor vent near the wall surface is blown away from the wall surface and does not contaminate the wall surface. There is an effect that the pressure loss of the blown-out wind is reduced and the amount of blown-out air is increased.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to the drawings. In FIG. 1, the duct connection cylinder 4 is inserted into a ventilation port B provided on the wall A in the room and is cylindrical so as to discharge room air. The connecting cylinder 4 is provided with a flange 3. The flange 3 is fixed to the outside of the wall surface with a screw or the like to attach the ventilation hood main body 1. The ventilation hood 1 is provided with a wind and rain prevention plate 1a for preventing entry into the room from wind and rain from the front of the hood. A mounting bracket 5 is fixed to the wind and rain prevention plate 1a. The tip 5a of the metal fitting 5 is inserted into a mounting hole 2d provided in the wind guide cylinder 2 having a vent E on the outer periphery, and the wind / rain prevention plate 1a and the wind guide cylinder 2 are connected together. A plurality of vent holes E are formed on the outer periphery of the wind guide cylinder 2. The vents E are provided with louvers 2a, 2b and 2c by cutting and raising, respectively.

  The wind guide cylinder 2 is located between the wind / rain prevention plate 1a and the flange 3, and is provided to prevent wind and rain from entering the indoor from the connection cylinder 4 directly from the upper, lower and lateral directions. Further, the louvers 2a, 2b, and 2c are integrally formed on the wind guide cylinder 2 by cutting and raising. Note that the louvers 2 a, 2 b, and 2 c are provided on the outer periphery of the wind guide cylinder 2 so as to be inclined at different angles toward the outer side opposite to the wall surface A.

  The lower side of the wind and rain prevention plate 1a is detachably attached by screws 8 so that the front end 6a of the lower hood mounting bracket 6 is aligned with the mounting hole 7 provided in the wind guide cylinder 2. One end 6b of the mounting bracket is fixed to the wind / rain prevention plate 1a by welding or the like.

FIGS. 2 and 4 show parts of the wind guide cylinder 2 and each of the gallery 2a, 2b, 2c formed in each of the vent holes E. FIG. The louvers 2a, 2b, and 2c have an acute angle that increases in inclination angle A, B, and C with the perpendicular to the outer peripheral surface of the wind guide cylinder 2 from the side A close to the wind and rain prevention plate toward the side C close to the wall surface. It is going to be. That is, of the louvers 2a, 2b, and 2c, the louver 2c that is the most indoor side forms a predetermined acute angle with the outer peripheral surface of the wind guide cylinder 2, and the louver 2a that is disposed on the outdoor side of the louver 2c that is the most indoor side. 2b is an acute angle larger than a predetermined acute angle.

  Since it is configured in this manner, the dirty room discharged from the ventilation port passes through the connecting cylinder and is discharged to the outside from the ventilation hole E of the wind guide cylinder 2, but by the gallery 2a, 2b, 2c. Since the air is guided to the outside of the wall surface and blown, the wall surface can be prevented from being soiled, and the ventilation hood main body can be provided with a vent in a location close to the wall surface, and thus can be miniaturized.

  Moreover, since the pressure loss of exhaust gas is reduced by setting the angles of the louvers 2a, 2b, and 2c to different angles, the ventilation hood can be downsized without increasing the capacity of the blower.

Embodiment 2. FIG.
A second embodiment will be described with reference to FIG. In the upper part of the wind guide cylinder 2, the vent holes E and the louvers 2a, 2b and 2c protruding outward are not formed. By doing so, since there is no wind and rain entering from the upper part, better wind and rain prevention can be improved.

  In addition, since the louver is formed toward the outdoor side by providing a predetermined inclination angle on the outside of the air vent E of the wind guide cylinder 2, the direction opposite to the wall surface at the air outlet near the wall surface, that is, wind and rain prevention Since the air is exhausted in the direction of the plate 1a, the performance of preventing contamination on the wall surface can be improved.

  Moreover, since the opening area is enlarged so that ventilation resistance may reduce ventilation resistance, the ventilation performance of ventilation hood improves.

It is sectional drawing of the ventilation hood which shows Embodiment 1 of this invention. It is a components figure of the wind guide cylinder used for Embodiment 1 of this invention. It is a part figure of the louver used for Embodiment 2 of this invention. It is a louver partial enlarged view used for Embodiment 1 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ventilation hood, 1a Wind-and-rain prevention board, 2 Wind guide cylinder, 2a, 2b, 2c Gallery, 3 Flange, 4 Duct connection air path, 5 Upper hood mounting bracket, 6 Lower hood mounting bracket, 7 Mounting hole,
A Wall, B Vent, E Vent

Claims (1)

A flange attached to the outside of the ventilation opening provided on the wall of the building ;
The flange has one end connected to the wind guide cylinder body connected wind and rain preventing plate to the other,
And a plurality of vents that form the shape on the outer periphery of the wind guide cylinder,
A ventilation hood in which a plurality of louvers are provided by cutting and raising the wind guide cylinder corresponding to the vent, and the louver is inclined to the outside to project outward from the cylinder ,
Among the plurality of louvers, the louver on the most indoor side forms a predetermined acute angle with the outer peripheral surface of the wind guide cylinder, and the louver disposed on the outdoor side of the louver on the most indoor side has the predetermined acute angle. A ventilation hood characterized by a larger sharp angle .

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