JP2021162166A - Ventilation fan - Google Patents

Abstract

To obtain a ventilation fan that can be downsized with a simple structure while preventing product failure due to the entry of water droplet into a power supply electric wire connecting device along an external power supply electric wire.SOLUTION: A ventilation fan 50 has a body frame, a blower supported by the body frame, a control substrate 11 that is installed in a flange portion 9 to control the operation of the blower, and a power supply electric wire connecting device 13 that is installed in the flange portion 9 and electrically connects an external power supply electric wire 21 connecting to an external power supply and an internal power supply electric wire connecting to the control substrate 11. The control substrate 11 is disposed at a position that is an upper part than a wind channel on a back surface of the flange portion 9 when viewing the flange portion 9 from an indoor side, while the ventilation fan 50 is installed at an installation place. To the power supply electric wire connecting device 13, an external power supply electric wire 21 is connected so that the external power supply electric wire 21 is connected from a vertically lower direction while the ventilation fan 50 is installed at an installation place.SELECTED DRAWING: Figure 5

Description

The present disclosure relates to a ventilation fan that is installed from the indoor side in a mounting portion such as a wall or ceiling of a building, sucks indoor air, and exhausts it to the outside through a blower pipe.

There is known a ventilation fan that is inserted from the indoor side into a ventilation pipe such as a pipe or duct that communicates indoors and outdoors at a mounting part such as a wall or ceiling of a building, and exhausts the indoor air to the outside to ventilate the room. .. Such a ventilation fan includes a cylindrical wind tunnel that is inserted into a blower pipe, and a blower in which a propeller-type impeller rotates in the wind tunnel. Such a ventilation fan is equipped with a control board and a sensor for detecting the presence or absence of people in the room, the humidity in the room, the temperature in the room, a specific gas concentration, etc., and automatically switching the operation, stop, or strength operation of the product. There are also models equipped with it.

As shown in Patent Document 1, such a ventilation fan has a structure in which a power supply wire connecting device connected by a relay line or the like from a control board covered with a protective case made of resin is arranged on the back surface of a flange portion. Often.

Japanese Patent No. 6429995

However, according to the above-mentioned conventional technique, it is necessary to arrange the power supply wire connecting device separately from the control board, which requires a space for arranging each component, and the ventilation fan becomes large or attached to fix each component. There is a problem that the structure becomes complicated because parts are required.

Further, it is conceivable to directly mount the power supply wire connecting device on the control board for the purpose of saving space and reducing auxiliary parts. However, in this case, water droplets generated by dew condensation or the like enter the power supply wire connecting device through the external power supply wire, and there is a concern about a problem of product failure such as a short circuit.

The present disclosure has been made in view of the above, and it is possible to realize miniaturization with a simple structure while preventing product failure caused by water droplets entering the power supply wire connecting device through the external power supply wire. The purpose is to get a ventilation fan.

In order to solve the above-mentioned problems and achieve the object, the ventilation fan according to the present disclosure is a tubular wind tunnel that is inserted and mounted from the indoor side into a tubular component that communicates indoors and outdoors, and is stretched from the end of the wind tunnel. A main body frame having a flange to be ejected, a blower supported by the main body frame, a control board installed on the flange to control the operation of the blower, and an external power wire and control board installed on the flange to communicate with an external power source. It has a power supply wire connecting device that electrically connects the internal power supply wire leading to the flange. The control board is arranged at a position above the wind tunnel on the back surface of the flange portion when the flange portion is viewed from the indoor side in a state where the ventilation fan is installed at the installation location. In the power supply wire connecting device, the external power supply wire is connected so that the external power supply wire is connected from the vertical downward direction when the ventilation fan is installed at the installation location.

According to the ventilation fan according to the present disclosure, it is possible to realize miniaturization with a simple structure while preventing product failure caused by water droplets entering the power supply wire connecting device through the external power supply wire. ..

Sectional drawing which shows the attachment state of the ventilation fan which concerns on Embodiment 1. Rear view of the ventilation fan according to the first embodiment An exploded perspective view of the back side of the ventilation fan according to the first embodiment. The plan view which shows the power wire connection device directly attached to the control board of the ventilation fan which concerns on Embodiment 1. A cross-sectional view showing a state in which the external power supply electric wire of the ventilation fan according to the first embodiment is connected to the main body of the ventilation fan. Schematic diagram showing a state in which the external power supply wire of the ventilation fan according to the first embodiment is fixed to the screw boss for fixing the external power supply wire. Rear view showing a state in which a protrusion is provided in the ventilation fan according to the first embodiment.

Hereinafter, the ventilation fan according to the embodiment will be described in detail with reference to the drawings.

Embodiment 1.
FIG. 1 is a cross-sectional view showing an attached state of the ventilation fan 50 according to the first embodiment. FIG. 2 is a rear view of the ventilation fan 50 according to the first embodiment. FIG. 3 is an exploded perspective view of the back side of the ventilation fan 50 according to the first embodiment. FIG. 4 is a plan view showing a power supply wire connecting device 13 directly attached to the control board 11 of the ventilation fan 50 according to the first embodiment. FIG. 4 shows an external power wire 21 connected to the power wire connecting device 13. FIG. 5 is a cross-sectional view showing a state in which the external power supply electric wire 21 of the ventilation fan 50 according to the first embodiment is connected to the main body 6 of the ventilation fan 50. FIG. 6 is a schematic view showing a state in which the external power supply wire 21 of the ventilation fan 50 according to the first embodiment is fixed to the screw boss 20 for fixing the external power supply wire. FIG. 7 is a rear view showing a state in which the protrusion 23 is provided in the ventilation fan 50 according to the first embodiment.

In the following, the indoor side is the left side in FIG. 1, and the outdoor side, that is, the outdoor side is the right side in FIG. The left-right direction in the following description is the left-right direction in FIG. As shown in FIG. 1, the left-right direction corresponds to the horizontal direction in the state where the ventilation fan 50 is installed in the pipe 1 where the ventilation fan 50 is installed. The vertical direction in the following description is the vertical direction in FIG. As shown in FIG. 1, the vertical direction corresponds to the vertical direction in the state where the ventilation fan 50 is installed in the pipe 1 where the ventilation fan 50 is installed.

The ventilation fan 50 according to the first embodiment is inserted into a pipe 1 that communicates indoors and outdoors or a duct that communicates indoors and outdoors from the indoor side. The ventilation fan 50 according to the first embodiment has a main body 6 in which a blower equipped with a propeller type impeller 4 and an electric motor 5 is assembled to a main body frame 3 made of resin, and a decorative grill 7.

The main body frame 3 has a cylindrical wind tunnel 2 to be inserted into a pipe 1 which is a tubular air passage. A bell mouth-shaped opening 8 serving as a suction port is provided in the front portion of the wind tunnel 2. The main body frame 3 has a front surface structure integrally formed at the rim portion of the opening 8. The front surface structure has a flange portion 9 having a square outer shape protruding from the end portion of the wind tunnel 2 in the diameter-expanding direction, and a rising portion 10 formed on the edge edge of the flange portion 9 and protruding toward the back surface side. The end face of the rising portion 10 comes into contact with the wall surface on the indoor side. The outer shape of the flange portion 9 may be circular. The back side is the back side when the ventilation fan 50 is viewed from the indoor side.

The blower is attached to the motor mounting structure 26 provided on the outdoor side of the wind tunnel 2 of the main body frame 3. The electric motor mounting structure 26 includes four legs 15 extending to the back side along the center line direction of the wind tunnel 2 at intervals in the circumferential direction, and a bridge tie extending inward in the radial direction from the end of the legs 15. A motor cover 17 supported by a portion 16 at the center of the wind tunnel 2 is provided. The four legs 15 are all inside the outer circumference of the wind tunnel 2, and one of them has a warp that holds the main body 6 in the pipe 1 or the duct by the radial expansion elasticity. Leaf spring 18 is attached.

The motor 5 is fixed to the motor mounting structure 26 with screws, and the shaft 19 projects from the tip of the motor cover 17 onto the center line of the wind tunnel 2 at the flange portion of the outer shell of the motor 5. An impeller 4 is mounted on a shaft 19 extending on the center line in the wind tunnel 2 of the electric motor 5. The impeller 4 is arranged inside the wind tunnel 2. The decorative grill 7 has a structure that covers the flange portion 9 and the rising portion 10 which are the front structures of the main body frame 3, and is attached to the main body 6 by claw fitting.

The main body frame 3 is provided with a left side screw fixing portion 9a on the left side on the back side and a right side screw fixing part 9b on the right side on the back side as a fixing part used for fixing the main body frame 3 to the product mounting surface. The lower left screw fixing portion 9c is provided on the lower left side of the back surface side, and the upper right side screw fixing portion 9d is provided on the upper right side of the back surface side. The main body frame 3 includes a wood screw 14 attached to the back surface of the main body frame 3, a left screw fixing portion 9a, a right screw fixing portion 9b, a lower left screw fixing portion 9c, and an upper right screw fixing portion 9d. It is fixed to the product mounting surface using.

The control board 11 is housed in a region adjacent to one side of the main body 6 on the back surface side of the flange portion 9. The back side of the flange portion 9 is the back side when the flange portion 9 is viewed from the indoor side. The control board 11 is arranged in a region above the wind tunnel 2 on the back surface 9e of the flange portion 9, that is, in a region directly below the rising portion 10a on the back surface 9e of the flange portion 9. The upper rising portion 10a is a rising portion 10 located in the vertically upward direction when the ventilation fan 50 is installed in the pipe 1 where the ventilation fan 50 is installed. Therefore, on the back surface side of the flange portion 9, no other component is arranged between the upper rising portion 10a and the control board 11.

The control board 11 controls the operating state of the ventilation fan 50, that is, switching between operation and stop of the ventilation fan 50 or switching of operating intensity. The control board 11 controls the operation of the blower to control the operating state of the ventilation fan 50. The control board 11 has a horizontally long plate shape, and the longitudinal direction is parallel to the extension direction of the upper side of the flange portion 9, and the control substrate 11 is housed on the back surface 9e side of the flange portion 9.

Further, on the back surface 9e side of the flange portion 9, a connection portion protective cover 12 that covers the control board 11 from the back surface side is provided in order to prevent contact with the control board 11. The connection portion protective cover 12 prevents contact with the control board 11 by covering the back surface 11a of the control board 11 from the back side, except for the area around the power wire connecting device 13 described later.

The control board 11 is covered with the connection portion protective cover 12 except for the peripheral portion of the power supply wire connecting device 13. That is, on the back surface 11a of the control board 11, the area other than the peripheral portion of the power wire connecting device 13 is covered with the connection portion protective cover 12 that covers the control board 11 from the back surface side on the back surface 9e side of the flange portion 9. Therefore, the area where the power wire connecting device 13 is arranged and the area around the power wire connecting device 13 on the back surface 11a of the control board 11 are not covered by the connection portion protective cover 12. By providing the connection portion protection cover 12, contact of the control board 11 with the region covered by the connection portion protection cover 12 is prevented.

A power wire connecting device 13 is provided on the back surface 11a of the control board 11. The power wire connecting device 13 is directly attached to the back surface 11a of the control board 11 that controls the operating state of the ventilation fan 50, and is arranged above the wind tunnel 2 on the back surface 9e of the flange portion 9. The power wire connecting device 13 provided in the ventilation fan 50 is a single-phase two-wire system. The power wire connecting device 13 is a terminal block for connecting an external power wire having an outer shell made of flame-retardant resin, and is an external power wire 21 electrically connected to an external power source (not shown), a control board 11, and a power source. A board connection wiring (not shown) that connects the electric wire connection device 13 is connected. The board connection wiring is an internal power supply wire leading to the control board 11. A vinyl insulated vinyl sheath flat cable can be applied to the external power supply wire 21 and the substrate connection wiring, but the present invention is not limited thereto.

One end of the external power supply electric wire 21 is pulled into one end portion 13a side of the power supply electric wire connecting device 13. The board connection wiring is drawn to the surface side of the power supply wire connection device 13 facing the back surface 11a of the control board 11. The external power supply wire 21 and the board connection wiring are connected inside the power supply wire connection device 13.

Specifically, one end of the external power wire 21 is connected to the power wire connecting device 13 from the vertical downward direction in a state where the ventilation fan 50 is installed in the pipe 1 where it is installed. That is, the external power electric wire 21 is drawn into the power electric wire connecting device 13 from the one end portion 13a side, which is the end portion in the vertical downward direction in the state where the ventilation fan 50 is installed in the pipe 1, which is the installation location. Therefore, the external power supply wire 21 is connected to the power supply wire connection device 13 from the lower direction to the upper direction of the main body 6 of the ventilation fan 50, and the ventilation fan 50 is installed in the pipe 1 where it is installed. It is connected from the floor side to the ceiling side.

Here, the portion of the external power supply wire 21 on the other end side of one end is fixed to the screw boss 20 for fixing the external power supply wire provided on the back surface 9e of the flange portion 9 as shown in FIG. The screw boss 20 for fixing the external power supply wire is a columnar portion protruding from the back surface 9e of the flange portion 9 toward the back surface. The external power supply electric wire 21 is arranged in contact with the side surface of the screw boss 20 for fixing the external power supply electric wire, and is fixed to the side surface of the screw boss 20 for fixing the external power supply electric wire by the cord clip 24. The cord clip 24 is a fixing component for fixing the screw boss 20 for fixing the external power supply wire to the columnar portion.

The height position of the screw boss 20 for fixing the external power supply wire is located on the indoor side of the height position of the control board 11. The height position of the screw boss 20 for fixing the external power supply wire and the height position of the control board 11 are positions from the back surface 9e of the flange portion 9 toward the back surface. As a result, the portion of the external power supply wire 21 on the other end side of the power supply wire connecting device 13 can be fixed to the external power supply wire by the cord clip 24 in a state of being bent toward the room side of the power supply wire connecting device 13 and the control board 11. It is fixed to the side surface of the screw boss 20. That is, the fixing portion fixed to the screw boss 20 for fixing the external power supply wire 21 in the external power supply electric wire 21 is located on the indoor side of the control board 11. Therefore, the external power supply electric wire 21 is fixed to the screw boss 20 for fixing the external power supply electric wire at a position on the indoor side of the height position of the control board 11.

The height position of the cord clip 24 in the state where the power supply wire connecting device 13 is fixed to the screw boss 20 for fixing the external power supply wire is located on the indoor side of the height position of the control board 11. There is. As a result, even when the external power supply wire 21 is fixed to the side surface of the screw boss 20 for fixing the external power supply wire by the cord clip 24, the entire structure for fixing the external power supply wire 21 is set closer to the height position of the control board 11. The position can be set on the indoor side, the height of the main body 6 does not need to be increased, and the power supply wire connecting device 13 can be fixed to the screw boss 20 for fixing the external power supply wire while realizing space saving.

Further, the external power supply electric wire 21 is above the bent portion 21a and outside the bent portion 21a at the bent portion 21a which is a portion on the other end side of the fixing portion fixed to the screw boss 20 for fixing the external power electric wire by the cord clip 24. It is arranged in a bent state.

When the ventilation fan 50 is used, water droplets generated by dew condensation or the like and adhering to the surface of the external power supply wire 21 between the power supply wire connecting device 13 and the bent portion 21a collect at the bent portion 21a due to the action of gravity. Therefore, water droplets adhering to the surface of the external power supply wire 21 between the power supply wire connecting device 13 and the bent portion 21a do not enter the inside of the power supply wire connecting device 13, and the water droplets reach the control board 11. Never.

That is, even in a structure in which the power wire connecting device 13 is directly mounted on the control board 11, the ventilation fan 50 is generated due to dew condensation or the like when the ventilation fan 50 is used, and is generated between the power wire connecting device 13 and the bent portion 21a. The water droplets adhering to the surface of the external power supply electric wire 21 do not reach the charging portion, and the occurrence of a short circuit or the like can be prevented. Specifically, the charging unit is a connection portion between the external power supply wire 21 and the board connection wiring inside the power supply wire connection device 13, a connection portion between the power supply wire connection device 13 and the control board 11, and the like.

Further, in the ventilation fan 50, due to the trap structure in which the external power supply electric wire 21 is folded back at the bent portion 21a, water droplets adhering to the surface of the external power supply electric wire 21 on the other end side of the bent portion 21a are caused by the action of gravity at the bent portion 21a. Gather at. Therefore, the water droplets adhering to the surface of the external power supply wire 21 on the other end side of the bent portion 21a do not enter the inside of the power supply wire connection device 13, and the water droplets do not reach the control board 11.

As described above, even in the structure in which the power supply wire connecting device 13 is directly mounted on the control board 11, the ventilation fan 50 does not reach the charging part due to water droplets generated by dew condensation or the like when the ventilation fan 50 is used, resulting in a short circuit or the like. Occurrence can be prevented.

Further, in the ventilation fan 50, the control board 11 is arranged in a region directly below the upper rising portion 10a on the back surface 9e of the flange portion 9. Therefore, when the ventilation fan 50 is used, water droplets generated by dew condensation or the like and adhering to the surface of other components between the upper rising portion 10a and the control board 11 are generated by the power supply arranged on the control board 11. It does not enter the inside of the electric wire connecting device 13.

Further, the board connection wiring is pulled out from the back surface 11a of the control board 11 and is directly drawn into the power supply wire connection device 13 from the surface of the power supply wire connection device 13 facing the back surface 11a of the control board 11. Therefore, when the power wire connecting device 13 is directly attached to the back surface 11a of the control board 11, the board connecting wiring is invisible from the outside.

In the above description, the case where the external power supply wire 21 is fixed to the screw boss 20 for fixing the external power supply wire 21 by the cord clip 24 has been described, but the external power supply wire 21 may be fixed by using the protrusion 23. That is, instead of fixing the external power supply wire 21 using the screw boss 20 for fixing the external power supply wire and the cord clip 24, the external power supply wire 21 may be fixed using the protrusion 23.

The protrusion 23 is provided with a groove 23a in the center of the protrusion 23, and has a structure in which the external power supply wire 21 is fixed to the protrusion 23 by press-fitting the external power supply wire 21 into the groove 23a. The position where the external power supply electric wire 21 is fixed to the protrusion 23 is a position on the indoor side of the control board 11 as in the case of the screw boss 20 for fixing the external power supply electric wire. As a result, the portion of the external power wire 21 on the other end side of the power wire connecting device 13 is fixed to the protrusion 23 in a state of being bent toward the room side of the power wire connecting device 13 and the control board 11. Therefore, the external power supply wire 21 is fixed to the protrusion 23 at a position on the indoor side of the height position of the control board 11.

As a result, even when the external power supply electric wire 21 is fixed by using the protrusion 23, the entire structure for fixing the external power supply electric wire 21 can be set to a position on the indoor side of the height position of the control board 11, and the main body can be set. It is not necessary to increase the height of No. 6, and the power wire connecting device 13 can be fixed to the protrusion 23 while saving space.

The cord clip 24 and the screw boss 20 for fixing the external power supply wire form a power supply wire fixing portion for fixing the external power supply wire 21 on the power supply wire connection device 13 side on the back surface 9e of the flange portion 9. Similarly, the protrusion 23 also constitutes a power wire fixing portion for fixing the external power wire 21 on the power wire connecting device 13 side on the back surface 9e of the flange portion 9.

As described above, in the ventilation fan 50 according to the present embodiment, the control board 11 is arranged in the region above the wind tunnel 2 on the back surface 9e of the flange portion 9. Then, in the ventilation fan 50, the power wire connecting device 13 is directly attached to the back surface 11a of the control board 11. Further, in the ventilation fan 50, the external power supply electric wire 21 electrically connected to the external power source is connected to the power supply electric wire from the vertically downward direction to the vertically upward direction in the state where the ventilation fan 50 is installed in the pipe 1 where the ventilation fan 50 is installed. It is connected to the device 13 and is connected from the floor side to the ceiling side.

As a result, the ventilation fan 50 is generated by dew condensation or the like during use, and water droplets adhering to the surface of the external power supply wire 21 between the power supply wire connecting device 13 and the bent portion 21a infiltrate into the power supply wire connecting device 13. And no water droplets reach the control board 11. That is, even in a structure in which the power wire connecting device 13 is directly mounted on the control board 11, the ventilation fan 50 is generated due to dew condensation or the like when the ventilation fan 50 is used, and is generated between the power wire connecting device 13 and the bent portion 21a. The water droplets adhering to the surface of the external power supply electric wire 21 do not reach the charging portion, and the occurrence of a short circuit or the like can be prevented.

Since the power wire connecting device 13 is directly attached to the back surface 11a of the control board 11, the ventilation fan 50 is a power wire connecting device as compared with the case where the power wire connecting device 13 is arranged as a separate component independent of the control board 11. It is possible to reduce the manufacturing cost by reducing the auxiliary parts and the like for fixing the 13. Further, it is not necessary to provide an arrangement area dedicated to the power supply wire connecting device 13 in the surface of the back surface 9e of the flange portion 9, and space saving can be realized.

Further, the fixed portion of the external power supply wire 21 fixed to the screw boss 20 for fixing the external power supply wire by the cord clip 24 is located on the indoor side of the control board 11. As a result, even when the external power supply wire 21 is fixed to the side surface of the screw boss 20 for fixing the external power supply wire 21 by the cord clip 24, the ventilation fan 50 can adjust the entire structure for fixing the external power supply wire 21 to the height of the control board 11. The position can be set to the indoor side rather than the vertical position, and it is not necessary to increase the height of the main body 6, and while saving space, the power wire connecting device 13 is used as the screw boss 20 for fixing the external power wire. Can be fixed.

Further, the external power supply electric wire 21 has a structure in which the bent portion 21a is bent above the bent portion 21a and outward. As a result, in the ventilation fan 50, water droplets adhering to the surface of the external power supply wire 21 on the other end side of the bent portion 21a do not enter the inside of the power supply wire connection device 13, and the water droplets reach the control board 11. Never. As a result, even in a structure in which the power supply wire connecting device 13 is directly mounted on the control board 11, the ventilation fan 50 is generated due to dew condensation or the like when the ventilation fan 50 is used and adheres to the surface of the external power supply wire 21 on the other end side. The water droplets do not reach the charging part, and it is possible to prevent the occurrence of a short circuit or the like.

Therefore, according to the ventilation fan 50 according to the present embodiment, it is possible to realize miniaturization with a simple structure while preventing product failure caused by water droplets entering the power supply wire connecting device 13 through the external power supply wire 21. It has the effect of obtaining a good ventilation fan 50.

The configuration shown in the above embodiment is an example, and can be combined with another known technique, or a part of the configuration may be omitted or changed without departing from the gist. It is possible.

1 pipe, 2 wind tunnel, 3 main body frame, 4 impeller, 5 electric wire, 6 main body, 7 decorative grill, 8 opening, 9 flange part, 9a left side screw fixing part, 9b right side screw fixing part, 9c left lower side screw fixing part , 9d right upper screw fixing part, 9e, 11a back, 10 rising part, 10a upper rising part, 11 control board, 12 connection part protective cover, 13 power wire connecting device, 13a one end, 14 wood screws, 15 legs, 16 Bridge, 17 Electric wire cover, 18 Leaf spring, 19 Shaft, 20 Screw boss for fixing external power supply wire, 21 External power supply wire, 21a Bending point, 23 Protrusion, 23a groove, 24 Cord clip, 26 Electric power supply mounting structure , 50 Ventilation fan.

Claims (5)

A main body frame having a tubular wind tunnel that is inserted and mounted from the indoor side into a tubular component that communicates indoors and outdoors, and a flange portion that projects from the end of the wind tunnel, a blower supported by the main body frame, and the above. Power supply wire connection that electrically connects the control board installed on the flange portion to control the operation of the blower, and the external power supply wire installed on the flange portion and communicating with the external power supply and the internal power supply wire communicating with the control board. A ventilation fan with a device
The control board is arranged at a position above the wind tunnel on the back surface of the flange portion when the flange portion is viewed from the indoor side in a state where the ventilation fan is installed at the installation location.
In the power supply wire connecting device, the external power supply wire is connected so that the external power supply wire is connected from the vertical downward direction when the ventilation fan is installed at the installation location.
Ventilation fan featuring. A protrusion for fixing the external power supply wire is provided on the back surface of the flange portion by projecting the flange portion toward the back surface when viewed from the indoor side.
The ventilation fan according to claim 1. The protrusion is located closer to the room than the control board.
2. The ventilation fan according to claim 2. The protrusion is a screw boss.
The ventilation fan according to claim 3. The protrusion is a protrusion having a groove into which the external power supply wire can be press-fitted.
The ventilation fan according to claim 3.

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