JP6161574B2 - Piping material for ventilation fan - Google Patents

Description

  The present invention relates to a ventilation fan piping member provided between an opening formed in a wall for attaching a propeller ventilation fan and a centrifugal fan type ventilation fan.

  The ventilation fan used in the kitchen of a house includes a propeller ventilation fan that is used by being attached to an opening formed on a wall of the kitchen, and a centrifugal fan type ventilation fan that is used by being attached above a cooking heater. In recent years, in a kitchen where a propeller ventilation fan has been used, the centrifugal fan type ventilation fan may be replaced. In this replacement, as disclosed in Patent Document 1, it is also possible to attach a centrifugal fan type ventilation fan to the opening portion where the propeller ventilation fan was attached.

JP 60-185035 A

  However, if the opening where the propeller ventilator is attached is far from the cooking heater, if the height of the opening where the propeller ventilator is attached and the mounting position of the centrifugal fan type ventilator are different, centrifugal It is necessary to construct duct piping from the blower type ventilation fan to the opening. From such a situation, there is a demand for suppressing the construction cost of duct piping.

  This invention is made in view of the above, Comprising: It aims at obtaining the piping member for ventilation fans which can suppress the construction cost of duct piping in the replacement work from a propeller ventilation fan to a centrifugal fan type ventilation fan. .

  In order to solve the above-described problems and achieve the object, the present invention is a ventilating fan piping member provided between an opening formed in a wall surface of a building and a ventilating fan attached to the interior of the building, the lower end A cylindrical first chamber having an open side and a cylindrical second chamber having an open upper end, and the lower end side of the first chamber is inserted into the upper end side of the second chamber. A duct connection port to which a duct extending from the ventilation fan is connected is formed, and an outdoor hood connection port to which an outdoor hood attached to the opening is connected is formed in the second chamber.

  According to the piping member for a ventilation fan according to the present invention, in the replacement work from the propeller ventilation fan to the centrifugal fan type ventilation fan, it is possible to reduce the construction cost of the duct piping.

FIG. 1 is a perspective view of a kitchen in which a propeller ventilation fan is replaced with a centrifugal fan type ventilation fan. FIG. 2 is a view of the kitchen shown in FIG. 1 as viewed from the front side of the centrifugal fan type ventilation fan. FIG. 3 is a diagram illustrating a schematic configuration of a ventilation fan piping member. FIG. 4 is a partially enlarged view in which the portion A shown in FIG. 3 is enlarged. FIG. 5 is an exploded perspective view of the first chamber. FIG. 6 is an exploded perspective view of the second chamber. FIG. 7 is a plan view of the plate member.

  Below, the piping member for ventilation fans concerning embodiment of this invention is demonstrated in detail based on drawing. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 1 is a perspective view of a kitchen in which a propeller ventilation fan is replaced with a centrifugal fan type ventilation fan. FIG. 2 is a diagram of the kitchen shown in FIG. The centrifugal fan type ventilation fan 2 which is a ventilation fan is attached above the heating heater 1 for cooking. The centrifugal fan type ventilation fan 2 collects oil and steam generated in the cooking heater 1. An opening 3 is formed in the wall surface 7 of the kitchen.

  The opening 3 is an opening formed for attaching a propeller ventilation fan (not shown). The opening 3 generally has a rectangular shape, and is defined as □ 175, □ 250, □ 300, □ 350 (mm) in the JIS standard. In Embodiment 1, the propeller ventilation fan attached to the opening 3 portion is removed. An outdoor hood 18 is attached to the outside of the opening 3. A gap between the outdoor hood 18 and the opening 3 is closed by a closing member such as a plate member.

  An air outlet (not shown) is formed on the top surface of the centrifugal fan type ventilation fan 2, and a duct 8 is connected to the air outlet. The duct 8 extends from the top surface of the centrifugal fan type ventilation fan 2 to the vicinity of the wall surface 7. The opening 3 and the duct 8 are connected by a ventilation fan piping member 6 extending along the wall surface 7.

  FIG. 3 is a diagram showing a schematic configuration of the ventilation fan piping member 6. FIG. 4 is a partially enlarged view in which the portion A shown in FIG. 3 is enlarged. The ventilation fan piping member 6 includes a first chamber 4 and a second chamber 5. The 1st chamber 4 is exhibiting the cylindrical shape by which the lower end 4a side was open | released. The first chamber 4 is formed using a corrosion-resistant plated steel plate.

  The 2nd chamber 5 is exhibiting the cylindrical shape by which the upper end 5a side was open | released. The second chamber 5 is formed using a coated sheet metal. The lower end 4a portion of the first chamber 4 is formed smaller than the upper end 5a portion of the second chamber 5, and the lower end 4a portion of the first chamber 4 is inserted inside the upper end 5a portion of the second chamber 5. .

  The first chamber 4 is formed with a duct connection port 10 to which a duct 8 extending from the centrifugal fan type ventilation fan 2 is connected. An outdoor hood connection port 9 connected to the outdoor hood 18 is formed in the second chamber 5. As shown in FIG. 2, the outdoor hood 18 and the outdoor hood connection port 9 are connected through the opening 3.

  By changing the amount of insertion of the first chamber 4 into the second chamber 5, the length of the ventilation fan piping member 6 can be changed. In other words, the distance between the duct connection port 10 and the outdoor hood connection port 9 can be changed by changing the amount of insertion of the first chamber 4 into the second chamber 5.

  FIG. 5 is an exploded perspective view of the first chamber 4. As shown in FIG. 5, the first chamber 4 forms a cylindrical body with a first member 11 bent into a U-shape and a second member 12 that closes an open portion of the first member 11. It is formed by closing one end of the body with the third member 13. The inside of this cylindrical body becomes an air path. A hole 12a is formed in the second member 12, and the duct connection port 10 is attached to the hole 12a portion.

  FIG. 6 is an exploded perspective view of the second chamber 5. As shown in FIG. 6, the second chamber 5 forms a cylindrical body with the first member 14 bent in a U-shape and the second member 15 closing the open portion of the first member 14. The inside of this cylindrical body becomes an air path. At the lower end of the first member 14, a protruding portion 14a having a semicircular shape when viewed from the second member 15 side is formed. A semicircular cutout 15 a is formed at the lower end of the second member 15.

  A round straight pipe 16 serving as an outdoor hood connection port 9 is attached to the lower end of the cylindrical body. The round straight pipe 16 is formed by forming a notch 16a on a side surface at one end side of a cylindrical duct. The notch 16 a is formed by notching a portion of the side surface of the round straight pipe 16 that is projected from the air channel shape of the second chamber 5.

  FIG. 7 is a plan view of the plate member 17. As shown in FIG. 7, a T-shaped plate member 17 is prepared in which two corners of a quadrangle are cut out to form a cutout 17a. When the plate member 17 is rolled to join the side 17b and the side 17c, a round straight pipe 16 having a notch 16a is formed. An example of a method for joining the side 17b and the side 17c is welding.

  The outdoor hood connection port 9 is provided at the lower end of the second chamber 5 by joining the round straight pipe 16 to the lower end of the cylindrical body in which the first member 14 and the second member 15 are combined. The bottom surface of the second chamber 5 is formed by the inner side surface of the round straight pipe 16.

  According to the ventilation fan piping member 2 described above, it is possible to adjust the insertion amount of the first chamber 4 to a length that matches the position of the opening 3 and the mounting position of the centrifugal fan type ventilation fan 2. Therefore, in the replacement work to the centrifugal fan type ventilation fan 2, the construction cost can be reduced by reducing the number of members and suppressing the material processing at the site.

  Further, since the first chamber 4 provided above is inserted inside the second chamber 5 provided below, the oil droplets flowing down along the inner surface of the first chamber 4 and the first chamber 4 It is difficult to leak from the joint between the two chambers 5.

  In addition, the duct 8 which connects the centrifugal fan type ventilation fan 2 and the duct connection port 10 of the piping member 6 for ventilation fans can use the straight pipe generally used and the piping duct of 90 degree | times bending. The duct 8 used for the kitchen is generally of φ150. The duct connection port 10 formed in the first chamber 4 may be a straight pipe of φ148 so that it can be easily connected to the duct 8 of φ150. Alternatively, it may be tapered so that the root is φ150 and the tip is φ140.

  In accordance with φ150, which is the diameter of the duct 8 used for kitchens, outdoor hoods for φ150 are often used. Therefore, if the outdoor hood connection port 9 is also formed in a circular shape of φ150, a joint for changing the duct diameter is often unnecessary, so that the construction cost can be suppressed.

  In addition, the outdoor hood connection port 9 formed in the second chamber 5 is positioned at the lowermost end of the second chamber 5 so that oil droplets accumulated on the bottom surface of the second chamber 5 are easily discharged to the outside. Can be suppressed. In Embodiment 1, since the inner side surface of the outdoor hood connection port 9 is the bottom surface of the second chamber 5, oil droplets are more easily discharged more smoothly. The outdoor hood connection port 9 is preferably cylindrical when considering connection with the outdoor hood 18, but may be prismatic.

  Moreover, by forming the outdoor hood connection port 9 using the plate member 17 shown in FIG. 7, it is possible to facilitate the processing when manufacturing the outdoor hood connection port 9 and to reduce the construction cost. Can do.

  Further, in the replacement work of the centrifugal fan type ventilation fan 2, the upper part of the centrifugal fan type ventilation fan 2 is in the ceiling and the lower part of the centrifugal fan type ventilation fan 2 is often an indoor space. In this case, a portion of the ventilation fan piping member 6 that is located below the centrifugal fan type ventilation fan 2 is exposed to the indoor space. And among the ventilation fan piping members 6, the second chamber 5 provided below is more easily exposed to the indoor space than the first chamber 4 provided above. In the first embodiment, since the second chamber 5 that is easily exposed to the indoor space is formed of the coated sheet metal, the design of the portion exposed to the indoor space can be improved.

  As described above, the ventilating fan piping member according to the present invention is useful as a piping member provided between the opening formed in the wall surface and the centrifugal fan type ventilating fan.

  DESCRIPTION OF SYMBOLS 1 Cooking heater, 2 Centrifugal blower type ventilation fan (ventilation fan), 3 opening, 4 1st chamber, 4a lower end, 5 2nd chamber, 5a upper end, 6 ventilation fan piping member, 7 wall surface, 8 duct, 9 outdoor hood connection Port, 10 Duct connection port, 11 1st member, 12 2nd member, 12a hole, 13 3rd member, 14 1st member, 14a Protruding part, 15 2nd member, 15a Notch, 16 Round straight pipe, 16a Notch, 17 plate member, 17a Notch, 17b, 17c sides, 18 Outdoor hood.

Claims (5)

A ventilating fan piping member provided between an opening formed in the wall of the building and a ventilating fan installed in the room of the building,
A cylindrical first chamber whose lower end is opened;
A cylindrical second chamber whose upper end is opened,
The lower end side of the first chamber is inserted into the upper end side of the second chamber,
A duct connection port to which a duct extending from the ventilation fan is connected is formed in the first chamber,
The piping member for a ventilating fan, wherein an outdoor hood connection port to which an outdoor hood attached to the opening is connected is formed in the second chamber.   The ventilating fan piping member according to claim 1, wherein the outdoor hood connection port is a round straight pipe extending toward the opening.   The ventilation fan piping member according to claim 2, wherein a bottom surface of the second chamber is formed by an inner surface of the round straight pipe.   4. The ventilation fan piping member according to claim 3, wherein the round straight pipe has a notch formed on a side surface and is connected to the second chamber at the notch portion. The first chamber is formed of a plated steel plate,
The ventilating fan piping member according to any one of claims 1 to 4, wherein the second chamber is formed of a coated sheet metal.

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