JPWO2019092892A1 - Ventilation fan for duct - Google Patents

Abstract

The duct ventilation fan (100) includes a body (2) having an air supply port provided on a lower surface, an exhaust port provided on a side surface, and a protrusion protruding upward on a top surface, and a side surface of the body (2). And a duct connecting part (8) which is detachably attached and has a tubular discharge port part extending the exhaust port, and the duct connecting part (8) is an engagement hole for engaging with the projection (21). An upper surface portion (33) provided with (22) and a surrounding frame (29, 30) surrounding the projection (21) protruding downward from the upper surface portion (33) and engaged with the engagement hole (22).

Description

  The present invention relates to a ventilation fan for a duct that supplies outside air into a room through a duct or discharges indoor air outside through a duct.

  First, the construction of the duct ventilation fan will be described. In the construction of a house, a duct for ventilation is preliminarily installed in the ceiling, then a ceiling material or the like is laid, and then a duct ventilation fan is installed in an opening for attaching a ventilation fan provided in the ceiling. For this reason, the duct connection part of the duct ventilation fan and the ventilation fan main body can be freely engaged and disengaged, first the duct and the duct connection part connected in the ceiling are connected, and the duct connection part is temporarily fixed to the ceiling, and then the ventilation fan main body is fixed. Many installation methods are used along the duct connection. In order to realize this installation method, there is disclosed a ventilation fan in which projections are provided at both end portions of a top plate of a ventilation fan main body, and engagement holes that engage with the projections are provided at an upper end of a duct connection portion (for example, , Patent Document 1).

  In addition, in order to prevent air leakage between the duct connection part and the ventilation fan main body, or to improve water shutoff, the duct at the lower part of the ventilation fan main body before the protrusion of the ventilation fan main body engages with the engagement hole of the duct connection part. There is disclosed a configuration in which the connection portion and the ventilation fan main body are engaged with each other to improve workability (for example, Patent Document 2).

JP, 2005-273529, A JP, 2013-245897, A

  The duct ventilation fan disclosed in Patent Document 1 has a problem that it is difficult to visually check the engagement hole of the duct connection portion when the ventilation fan main body is slid along the duct connection portion and inserted into the opening of the ceiling. It was Further, since it is difficult to visually check the engaging hole of the duct connecting portion, there is a problem that the engaging hole of the duct connecting portion and the protrusion of the ventilation fan main body cannot be engaged with each other. Further, when the duct connecting portion falls outward (to the duct side) with respect to the main body of the ventilation fan, there is a problem that the projection on the top surface of the body and the engaging hole of the duct connecting portion do not engage with each other and cannot be fixed. Furthermore, by fixing the ventilation fan main body with the duct connection part removed, a gap is created between the ventilation fan main body and the duct connection part, and there is a problem that air or the like leaks.

  Patent Document 2 discloses that the ventilation fan main body and the lower edge portion of the duct connection portion are fixed to each other to improve airtightness and waterproofness, but there is a problem such as a complicated mounting structure. . In addition, there is a problem in that the number of parts is large, such as the need for a ventilation fan main body clearance plate, and the labor required for work increases. Furthermore, since the duct connecting part and the ventilation fan main body are provided with a shape that engages with each other on the lower side of the ventilation fan main body, the air passage of the ventilation fan main body becomes small, which affects the ventilation performance and causes the noise to increase. There was also.

  The present invention has been made in order to solve the conventional problems, and it is possible to easily and surely fix the duct connection portion to the ventilation fan main body, and further, the duct that does not affect the blowing performance. Is to get a ventilation fan for.

  In order to solve the above problems, the present invention provides a ventilation fan main body in which an air supply port is provided on a lower surface, an exhaust port is provided on a side surface, and a projection protruding upward is provided on a top surface, and is attached to and detached from a side surface of the ventilation fan body. And a duct connection part having a tubular discharge port part that is attached so as to extend the exhaust port. The duct connection portion includes an upper surface portion provided with an engagement hole that engages with the projection, and an enclosure frame that projects downward from the upper surface portion and surrounds the projection engaged with the engagement hole.

  According to the present invention, the projection on the top surface of the ventilation fan main body can be reliably accommodated in the enclosing frame provided in the duct connection portion when the ventilation fan is installed, and further, the alignment between the projection and the engagement hole is easy. It is easy to match. In addition, it is possible to improve such a problem that the duct connection part is disengaged from the ventilation fan main body at the time of construction of the ventilation fan main body, and a wind leakage caused by the duct connection part being disengaged from the exhaust fan main body.

Sectional drawing which shows schematic structure of the attachment state of the ventilation fan for ducts which concerns on Embodiment 1 of this invention. Front view of the ventilation fan body in Figure 1 without the makeup grill Front view of the front view of FIG. 2 with the terminal cover open Sectional drawing explaining the construction state of the duct connection part of the ventilation fan for ducts of FIG. 1, and a ventilation fan main body. Sectional view showing a state that can occur in the duct connection part and the ventilation fan body during construction (conventional example) Sectional drawing which shows the engagement of the duct connection part and ventilation fan main body which concerns on Embodiment 1. Perspective view of the duct connection from the ventilation fan body side Explanatory drawing explaining the removal of the ventilation fan body and the duct connection part

  Hereinafter, a duct ventilation fan according to an embodiment of the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.

Embodiment 1.
1 to 8 are diagrams for explaining a duct ventilation fan according to Embodiment 1 of the present invention. FIG. 1 is a cross-sectional view showing a schematic configuration in an attached state, and FIG. 2 shows a makeup grill of a ventilation fan main body. The front view omitted, FIG. 3 is the front view of the front view of FIG. 2 with the terminal cover opened, FIG. 4 is a cross-sectional view illustrating the construction state of the duct connection portion and the ventilation fan main body, and FIG. 6 is a cross-sectional view showing a possible state of the duct connection part and the ventilation fan main body, FIG. 6 is a cross-sectional view showing the engagement between the duct connection part and the ventilation fan main body when the first embodiment is applied, and FIG. 7 is a duct connection. FIG. 8 is a perspective view of the ventilation fan body viewed from the ventilation fan main body side, and FIG. 8 is an explanatory diagram illustrating the removal of the ventilation fan main body and the duct connection portion. In the following description, the vertical direction is the vertical direction when the duct ventilation fan 100 is installed on the ceiling surface 32, and is the direction along the vertical direction. When the duct ventilation fan 100 is installed on the wall surface, the vertical direction of the duct ventilation fan 100 does not match the vertical direction. That is, the vertical direction of the duct ventilation fan 100 is not limited to the vertical direction.

  In FIG. 1, a duct ventilation fan 100 that ventilates using a duct 14 has a body 2 that constitutes a ventilation fan main body, and a duct connection portion 8 attached to the body 2. The body 2 is provided with an air supply port 2d on the lower surface, an exhaust port 2b on the side surface, and a projection 21 protruding upward on the top surface. The duct connection portion 8 includes a cylindrical discharge port portion 10 that extends the exhaust port 2b. The discharge port portion 10 is connected to the duct 14. The duct 14 communicates with the outside of the room, and the air in the room is ventilated by operating the duct ventilation fan 100 with the discharge port 10 connected to the duct 14.

(Ventilation fan for duct)
The duct ventilation fan according to the first embodiment will be described. The body 2 is a box type having an opening on one side, and the multi-blade blower 1 and the multi-blade blower 1 that are ventilation drives for circulating the air to be ventilated are provided on the surface (top side) opposite to the box opening. It has a fan casing 5 for housing. A lower surface of the fan casing 5 is opened and a suction port 6 is formed. The multi-blade blower 1 is composed of a motor 3 and a fan 4 that is inserted and coupled to a drive shaft of the motor 3.

(Explanation inside the ventilation fan for ducts)
The fan casing 5 is equipped with a terminal cover 11 that can be easily opened and closed. Further, inside the terminal cover 11, there is provided an electric wire connecting device 20 capable of connecting an external power supply electric wire. The electric wire connecting device 20 and the motor 3 are electrically connected by an internal electric wire. Electricity applied from an external power source electric wire (not shown) flows from the internal electric wire to the motor 3 via the electric wire connecting device 20 to convert electric energy into rotational movement of the motor 3. The rotational movement of the motor 3 is transmitted to the fan 4 connected to the drive shaft, whereby the fan 4 rotates and forms a flow of air. The air sucked from the suction port 6 by the fan casing 5 forms an exhaust air passage extending to the exhaust port 2b along the inner wall of the fan casing 5 by the multiblade blower 1.

(Makeup grill)
The duct ventilation fan 100 does not look good when the internal parts such as the fan casing 5 are visible, and therefore is provided with a decorative grill 12 that is a design part for making the internal parts invisible. The makeup grill 12 is provided with a spring 13 for attachment to the ventilation fan main body, and is fixed by hooking the spring 13 on the makeup grill attachment spring fixing portion 7 provided in the fan casing 5. Since the decorative grille 12 is attached by the spring 13, even if the thickness of the ceiling surface 32 is slightly changed, it can be easily dealt with, and a gap with the ceiling surface 32 is not generated. The decorative grille 12 has an effect of preventing foreign matter from entering the multi-blade blower 1 in addition to improving the design of the duct ventilation fan 100.

(Duct connection part)
The duct ventilation fan 100 is provided with a body 2 and a side surface of the body 2, and is connected to the side surface of the body 2. The duct connection includes a discharge port portion 10 extending in a direction perpendicular to the side surface of the body 2 and extending to a position where the exhaust port 2b communicates with the duct 14. And part 8. The discharge port portion 10 is formed in a step shape having different diameters. This is made into a step shape in consideration of the fact that the duct 14 to be piped can have a different diameter and workability such as taping. The duct 14 extends to the outside and is connected to a hood or the like provided on the outer wall of the building to form a ventilation air passage for ventilating the air in the house.

(shutter)
A shutter 9 that is opened and closed by wind pressure is provided in the duct connection portion 8. The shutter 9 is opened by wind pressure when the duct ventilation fan 100 is operating, and when stopped, the interior of the duct connecting portion 8 is closed by the weight of the shutter 9. By providing the shutter 9 in this manner, it is possible to prevent outside air from entering the room when the duct ventilation fan 100 is stopped. Although the shutter 9 that opens and closes by wind pressure is described in this description, an electrically driven shutter may be used in some cases.

(How to install the ventilation fan body and the duct connection part)
The installation of the duct ventilation fan 100 will be described with reference to FIG. The duct connecting portion 8 is connected to the duct 14 in advance, and the flange portion 8a and the ceiling surface 32 are temporarily fixed. In the present description, the case where the duct ventilation fan 100 is fixed to the ceiling surface 32 is shown, but it is also possible to install the duct ventilation fan 100 on the wall surface of the house. The duct connecting portion 8 and the body 2 can be attached and detached by sliding, and the pressure contact surface 27 of the body 2 with the duct connecting portion 8 is along the duct connecting portion 8 and the body is inserted into the embedding hole 26 provided in the ceiling surface 32. 2 is inserted and the body 2 is temporarily fixed. In the temporarily fixed state, the projection 21 protruding upward from the top surface of the body 2 engages with the engagement hole 22 provided in the upper surface portion 33 of the duct connection portion 8 between the body 2 and the duct connection portion 8. Further, the projection 8b provided on the flange portion 8a of the duct connecting portion 8 is inserted into the square hole 2c of the flange portion 2a of the body 2. In this way, the horizontal movement of the body 2 and the duct connecting portion 8 is suppressed and fixed. Further, the duct connecting portion fixing projection 23 on the side surface of the body 2 on the side of the exhaust port 2b is fitted into the square groove 24 of the duct connecting portion 8, so that the vertical movement is suppressed and fixed. In this way, the body 2 and the duct connection portion 8 are fixed, the exhaust port 2b of the body 2 and the discharge port portion 10 of the duct connection portion 8 communicate with each other, and the air to be ventilated can be exhausted through the duct 14. .

(How to remove the ventilation fan body and duct connection)
When the body 2 and the duct connecting portion 8 are to be removed, as shown in FIG. 8, the duct connecting portion removing protrusion 25 on the side surface of the body 2 on the exhaust port 2b side is pulled inside the body 2 to fix the duct connecting portion. The protrusion 23 is disengaged from the square groove 24, and can be moved in the vertical direction and can be slid to be removed.

(Explanation of conventional problems)
With respect to how to attach the body 2 and the duct connecting portion 8 described above, the conventional problems will be described with reference to FIG. When the body 2 is inserted into the embedding hole 26 after the duct connecting portion 8 is temporarily fixed to the embedding hole 26 of the ceiling surface 32 (or the wall surface), the duct connecting portion 8 is a duct as shown in FIG. 5 (conventional example). If it falls to the outside (the duct 14 side) with respect to the ventilation fan 100, there is a problem that the projection 21 on the top surface of the body 2 and the engagement hole 22 of the duct connection portion 8 do not engage with each other and cannot be fixed on the top surface side. . In particular, in order to prevent air leakage, a protrusion 28 provided on the upper part of a surface continuous with the pressure contact surface 27 with the duct connection portion 8 of the body 2 and an enclosure frame 29 provided in the duct connection portion 8 for enclosing the protrusion 28. Such engagement may be difficult to fix.

(Explanation of the Invention)
In the present embodiment, as shown in FIGS. 6 and 7, it is provided with enclosing frames 29, 30 which are connected to the engaging holes 22 of the duct connecting portion 8 and project from the upper surface portion 33 toward the protrusion 21 side of the body 2. ing. The duct connecting portion 8 integrally forms the upper surface portion 33 in which the engagement hole 22 is formed and the enclosing frames 29, 30 to reduce variations in component accuracy. The enclosing frames 29 and 30 surround the front of the protrusion 21 (on the duct connecting portion 8 side) with the enclosing frame 29 and surround the rear of the protrusion 21 (on the side of the motor 3 of the duct ventilation fan 100) with the enclosing frame 30. This facilitates the alignment of the engagement hole 22 with the engagement hole 22. Further, since the enclosing frames 29 and 30 are provided so as to project toward the protrusion 21, it is possible to welcome and guide the protrusion 21 into the frame at an early stage when the body 2 is inserted. The structure allows for alignment.

  Further, the lower portion (on the side of the protrusion 21) of the enclosing frame 30 is provided with an inclined portion 30b which is gently inclined from the edge of the frame toward the engagement hole 22. By providing the enclosing frame 30 with an inclined portion 30b that inclines from the edge 22a of the engaging hole 22 on the side facing the body 2 to the tip 30a of the enclosing frame 30, the protrusion 21 is formed along the inclined portion 30b. It is possible to reliably lead to No. 22. By doing so, even when the duct connecting portion 8 falls to the duct 14 side, the body 2 is inserted by the enclosing frames 29 and 30 protruding toward the protrusion 21 and the inclined portion 30b provided in the enclosing frame 30. The protrusion 21 can be reached at an early stage of time, the protrusion 21 can be reliably guided, and the protrusion 21 and the engagement hole 22 can be easily engaged.

  The protrusion 21 is formed so as to be gradually tapered from a position where it fits into the engagement hole 22 toward the tip 21a. By doing so, even if the duct connecting portion 8 is slightly inclined, there is a margin between the tip 21a of the protrusion 21 and the enclosing frames 29, 30, so that the protrusion 21 can be easily inserted between the enclosing frames 29, 30. It enters into and is guided to the engaging hole 22. Further, the tip 21a of the protrusion 21 is chamfered to provide a chamfered portion 31. Providing the chamfered portion 31 makes it easier for the protrusion 21 to follow the inclined portion 30b provided on the enclosing frame 30, and has a structure that allows easier engagement.

  As described above, the projection 21 on the top surface of the body 2 can be securely housed in the enclosing frames 29 and 30 provided in the duct connecting portion 8 when the duct ventilation fan 100 is installed, and further, the projection 21 can be engaged with the projection 21. The positioning with the dowel hole 22 is easy and the engagement is easy. Further, it is possible to improve such a problem that the duct connecting portion 8 is detached from the body 2 and a problem that the air leakage is caused due to the duct connecting portion 8 being detached from the ventilation fan main body.

  In the description, the case where the present invention is applied to the duct ventilation fan is described, but it is suitable for other blowers or air conditioners in which the blower main body and the duct connecting portion are divided and installed.

  1 multi-blade blower, 2 body, 2a, 8a flange part, 2b exhaust port, 2c square hole, 2d air supply port, 3 motor, 4 fan, 5 fan casing, 6 suction port, 7 spring fixing part for attaching decorative grille , 8 duct connection part, 8b, 21, 28 protrusion, 9 shutter, 10 discharge port part, 11 terminal cover, 12 makeup grille, 13 spring, 14 duct, 20 wire connection device, 21a, 30a tip, 22 engagement hole, 22a Edge part, 23 Duct connection part fixing protrusion, 24 Square groove, 25 Duct connection part removing protrusion, 26 Embedding hole, 27 Pressure contact surface, 29 Enclosing frame (front side), 30 Enclosing frame (rear side), 30b Inclination Part, 31 chamfered part, 32 ceiling surface, 33 upper surface part, 100 ventilation fan for duct.

Claims (5)

An exhaust fan main body in which an air supply port is provided on the lower surface, an exhaust port is provided on the side surface, and a projection protruding upward is provided on the top surface,
A duct connection part that is detachably attached to the side surface of the ventilation fan main body and that has a cylindrical discharge port part that extends the exhaust port,
The duct connecting portion includes an upper surface portion provided with an engagement hole that engages with the projection, and an enclosing frame that projects downward from the upper surface portion and surrounds the projection engaged with the engagement hole. A characteristic ventilation fan for ducts.   The ventilation fan for ducts according to claim 1, wherein the enclosing frame includes an inclined portion that is inclined from an edge portion of the engagement hole facing the ventilation fan main body toward a tip thereof.   The duct ventilation fan according to claim 1 or 2, wherein the protrusion is tapered from a position where the protrusion is fitted into the engagement hole toward a tip thereof.   The duct ventilation fan according to any one of claims 1 to 3, wherein the protrusion has a chamfered portion at a tip thereof.   The ventilation fan for duct according to any one of claims 1 to 4, wherein the surrounding frame is integrated with the upper surface portion.

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