JP6634239B2 - Exhaust hood - Google Patents

Description

  TECHNICAL FIELD The present invention relates to an exhaust hood, and more particularly, to a hood installed at an outer end of an exhaust passage of an indoor ventilation system, wherein external airflow hinders smooth exhaust from a room or causes backflow. The present invention relates to an exhaust hood that does not cause contamination and does not stain the wall around the installation section due to exhaust.

  In recent homes with high airtightness and high heat insulation, a so-called 24-hour ventilation system has been often adopted to discharge indoor contaminated air. In this system, outside air is gradually introduced as polluted air in the room is exhausted by the action of the exhaust fan. The exhaust fan is connected to a pipe usually made of vinyl chloride, which is fitted into a through hole in a wall surface, and a cylindrical fitting portion of an exhaust hood installed from the outdoor side is inserted into an outer end of the pipe. .

  Conventional exhaust hoods generally include a tubular body fitted into the pipe, and a shielding plate arranged at an interval in front of the opening of the tubular body, and the shielding plate includes a plurality of supporting legs. It is structured to be fixed to the cylindrical main body through the intermediary (for example, JP-A-8-240331).

  In the case of a configuration using a plurality of supporting legs for mounting such a shielding plate, it is easily affected by the wind, and in consideration of being exposed to a strong wind, not only there is a problem in strength but also there is a possibility that rain and snow may enter. In addition, there is a problem that the wall surface gradually becomes dirty as a part of the exhaust air continues to hit the wall surface.

JP-A-8-240331

  The present invention has been made in view of the above-described problems in the prior art, there is no possibility that the outer wall around the exhaust hood installation portion is contaminated by exhaust air and air leaking from a gap between the pipe and the tubular main body, An object of the present invention is to provide an exhaust hood that is not easily affected by wind and does not hinder smooth discharge of indoor air.

  The invention according to claim 1 for solving the above-mentioned problem is characterized in that a fitting tube fitted in a pipe, a deep dish-shaped receiving frame installed at an end of the fitting tube, and the receiving frame. A ventilation pipe installed in the inside, and a shielding plate closing the ventilation pipe, the opening edge of the receiving frame is a tapered surface expanding outward, and the ventilation pipe is small on the entire outer peripheral surface thereof. A large number of vents are provided vertically and horizontally, and each of the vents is provided with a guide piece inclined at an angle corresponding to the inclination of the tapered surface of the receiving frame, and the shielding plate has a spherical shape concaved inward. It is an exhaust hood characterized by being formed in.

  In one embodiment, the ventilation hole and the guide piece are formed by cutting out and bending the remaining side, leaving one long side of a rectangle. The ventilation cylinder is formed by rolling a single long plate provided with the plurality of ventilation holes and guide pieces, or a plurality of short plates formed with the ventilation holes and the guide pieces in the vertical direction, and connected. It is formed in a cylindrical shape by connecting through materials.

  Preferably, the inclination of the tapered surface of the receiving frame, the guide piece of the ventilation cylinder, and the curved surface of the shielding plate are the same or approximate. The depth of the recess of the shielding plate is 30 to 50 mm.

  The present invention is as described above, and the flow of the exhaust air from the room is directed in a direction away from the outer wall surface by the tapered surface of the receiving frame, the guide piece of each ventilation port of the ventilation cylinder, and the curved surface of the shielding plate. As a result, there is no possibility that the outer wall surface around the installation portion is contaminated by the discharged air, and the deterioration of the building (outer wall material) due to the discharged air leaking from the gap between the pipe and the tubular main body is prevented. Further, there is an effect that the air is hardly affected by the wind and the smooth discharge of the indoor air is not hindered.

It is a perspective view showing composition of an exhaust hood concerning the present invention. It is a side view showing composition of an exhaust hood concerning the present invention. It is a front view showing the composition of the exhaust hood concerning the present invention. FIG. 4 is a partially cutaway sectional view showing an installation state of the exhaust hood according to the present invention.

  An embodiment for carrying out the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view showing an external appearance of an embodiment of the present invention, and FIG. 2 is a side view thereof. As shown therein, an exhaust hood according to the present invention includes a vinyl chloride tube or the like fitted in a wall hole. Fitting tube 1 fitted in the pipe 21 of the above, deep dish-shaped receiving frame 2 installed at the end of the fitting tube 1, ventilation tube 3 installed in the receiving frame 2, and ventilation tube And 3 a shielding plate 4 for closing. It should be noted that the upper and lower expressions in the following description are based on FIG. 1 for convenience of explanation, and are different from the upper and lower expressions at the time of installation.

  A packing 5 is wound around the outer peripheral edge of the lower end of the fitting cylinder 1. The packing 5 prevents the discharge air from leaking from the gap between the fitting tube 1 and the pipe 21 to promote the deterioration of the building (outer wall material), and also allows rainwater or the like to enter the indoor side. It serves to prevent things from happening. Also, a suitable number of leaf springs 6 are provided on the outer peripheral surface of the fitting tube 1, and the plate springs 6 are resiliently generated by being pressed when the fitting tube 1 is inserted into the pipe 21, and the springs of the pipe 21 are formed. Press the inner peripheral surface. Thus, the fitting cylinder 1 is firmly held in the pipe 21 and its detachment is prevented.

  A flange portion extends in a horizontal direction from an upper end edge of the fitting cylinder 1, and a receiving frame 2 is fixed thereon. The receiving frame 2 is in the shape of a circular deep dish whose bottom face is opened in accordance with the fitting cylinder 1, and its upper half (opening edge) is a tapered surface 2a that expands outward. Reference numeral 7 denotes a fixing member 7 installed on the flange portion of the fitting tube 1 or the back surface of the receiving frame 2. By fixing the fixing member 7 to a wall, the exhaust hood can be firmly fixed to the wall. (See FIG. 4). The peripheral wall of the cylindrical portion of the receiving frame 2 is used for caulking processing in connection with the outer wall. Although not shown, a drain hole is appropriately formed in the receiving frame 2.

  In the receiving frame 2, a ventilation tube 3 provided with a shielding plate 4 is installed. The ventilation cylinder 3 is formed by forming a large number of ventilation ports 10 on the entire outer peripheral surface thereof, and arranging a guide piece 11 inclined at an angle corresponding to the inclination of the tapered surface 2a of the receiving frame 2 in each ventilation port 10. Is done. For example, the ventilation port 10 and the guide piece 11 can be formed by cutting out a long rectangular side while leaving one long side, and bending the remaining side. In the illustrated example, the upper side is left uncut, and the cutout piece is warped upward to form the guide piece 11. Since the guide piece 11 and the tapered surface 2a act to keep the exhaust air away from the wall surface, as described later, the bending angle thereof is about 45 ° with respect to the peripheral surface of the ventilation tube 3. Is preferred.

  The ventilation tube 3 is generally formed by rolling a single long plate having a large number of ventilation holes 10 and guide pieces 11 formed over the entire length by the above-described method. It is also possible to adopt a method in which a plurality of short plates, each of which is formed in a vertical direction, are connected to each other via a connecting member 12 so as to form a cylindrical shape. In this case, the entire length can be formed into a cylindrical shape by bending the short plate, but if not bent, the ventilation tube 3 becomes a polygonal cylindrical shape.

  Prior to being fixed in the receiving frame 2, the ventilation tube 3 is provided with a shielding plate 4 formed into a spherical shape that is concave inward. The shielding plate 4 has a state in which the exposed surface is depressed as in the illustrated example, and the depth of the depression is preferably in the range of 30 to 50 mm when the diameter is 200 mm. In addition, the shielding plate 4 is integrated with the ventilation tube 3 by connecting the connecting piece 13 protruding from the peripheral portion of the shielding plate 4 corresponding to the portion between the ventilation holes 10 by connecting the outer peripheral surface of the ventilation tube 3 between the ventilation holes 10 or the outer peripheral surface thereof. This is performed by folding over the connecting member 12 fixed to the above and fixing by welding or the like.

  The ventilation tube 3 may be fixed directly on the inner bottom surface of the receiving frame 2, or may be fixed on the upper surface of the interior frame 8 arranged in the receiving frame 2 as in the illustrated example. When the connecting member 12 is provided, its lower end is bent at a right angle, and that portion is fixed to the upper surface of the interior frame 8 (see FIG. 4). In addition, as is clear from each of the drawings, the tapered surface 2 a of the receiving frame 2 is in a state in which the tapered surface 2 a greatly expands outside the guide piece 11 of the ventilation tube 3.

  In the exhaust hood according to the present invention, the fitting tube 1 is fitted to the outer end of the pipe 21 inserted through the wall, and the fixing member 7 is fastened to the outer wall, as in the conventional exhaust hood (see FIG. 4). ), If necessary, a caulking process is applied to the connection between the peripheral wall of the cylindrical portion of the receiving frame 2 and the outer wall. In such an installed state, the exhaust air that is leaking from the gap between the fitting tube 1 and the pipe 21 is stopped by the packing 5 and the caulking, and the leakage prevents the deterioration of the outer wall from being promoted. . At the same time, the packing 5 and the caulking prevent rainwater and the like from entering the indoor side.

  The exhaust air that has flowed into the fitting cylinder 1 from the indoor side flows into the ventilation cylinder 3 from the receiving frame 2 and is released to the atmosphere through the ventilation port 10 on the peripheral surface of the ventilation cylinder 3. Flows along the guide piece 11 attached to the outer wall surface, and is surely deflected in a direction away from the outer wall surface and flows. In addition, the discharged air that has traveled straight hits the inner surface of the spherical shielding plate 4 and flows radially along the spherical surface, thereby deflecting in a direction away from the outer wall surface, similarly to the air discharged from each ventilation port 10. Is discharged. Therefore, the outer wall surface around the exhaust hood installation portion is not stained by the exhaust air.

  When the exhaust hood is installed, the portion outside the receiving frame 2 is exposed to the outside of the wall and exposed to the outside air, but the wind hitting the shielding plate 4 from the front side causes the outside of the curved surface of the shielding plate 4 to exhibit a curved surface. It flows radially along the surface and away from the outer wall. Then, the flow acts to draw out the discharged air from the ventilation port 10 on the peripheral surface of the ventilation tube 3 to promote the discharge. In addition, the wind flowing along the outer wall is obstructed by the guide pieces 11 attached to the ventilation holes 10, so that not only is it difficult for the air to flow into the ventilation holes 10, but also the shielding plate 4. The air flows radially in the direction away from the outer wall along the outer surface of the airbag so as to be pulled by the airflow, thereby contributing to the promotion of the discharge of the discharged air.

  In this way, the exhaust air from the room is released in a direction away from the outer wall, so that the exhaust air does not contaminate the outer wall around the exhaust hood installation portion. The flow of the discharged air away from the outer wall is achieved by the synergistic action of the tapered surface 2a of the receiving frame 2, the guide piece 11 of the ventilation tube 3, and the inner and outer curved surfaces of the shielding plate 4. When the inclination of the tapered surface 2 a of the receiving frame 2, the guide piece 11 of the ventilation tube 3, and the inner and outer curved surfaces of the shielding plate 4 are the same or similar, the maximum value is obtained.

  Although the present invention has been described in some detail with respect to its most preferred embodiments, it is evident that a wide variety of different embodiments can be constructed without departing from the spirit and scope of the invention. Accordingly, the invention is not limited to the specific embodiments except as limited in the appended claims.

DESCRIPTION OF SYMBOLS 1 Fitting cylinder 2 Receiving frame 2a Tapered surface 3 Ventilation cylinder 4 Shielding plate 5 Packing 6 Leaf spring 7 Fixing member 8 Interior frame
DESCRIPTION OF SYMBOLS 10 Vent 11 Guide piece 12 Connecting material 13 Connecting piece 21 Piping

Claims (6)

A fitting tube fitted in the pipe, a deep dish-shaped receiving frame installed at an end of the fitting tube, a ventilation tube installed in the receiving frame, and a shield for closing the ventilation tube And a board,
The opening edge of the receiving frame is a tapered surface that expands outward, and the ventilation cylinder has a large number of small vents formed vertically and horizontally on the entire outer peripheral surface thereof, and each of the vents has a taper of the receiving frame. An exhaust hood, comprising a guide piece inclined at an angle corresponding to the inclination of the surface, wherein the shielding plate is formed in a spherical shape depressed inward.   2. The exhaust hood according to claim 1, wherein the ventilation hole and the guide piece are formed by cutting out and bending the remaining side, leaving one long side of a rectangular shape. 3.   The exhaust hood according to claim 2, wherein the ventilation tube is formed by rolling a single long plate provided with the plurality of ventilation ports and guide pieces.   3. The exhaust hood according to claim 2, wherein the ventilation tube is formed in a tubular shape by connecting a plurality of short plates in which the ventilation holes and the guide pieces are formed in a vertical direction via a connecting material. 4.   The exhaust hood according to any one of claims 1 to 4, wherein the inclination of the tapered surface of the receiving frame, the guide piece of the ventilation tube, and the curved surface of the shielding plate are the same or approximate.   The exhaust hood according to any one of claims 1 to 5, wherein the depth of the recess of the shielding plate is 30 to 50 mm.

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