JP2012107806A - Ventilation fan - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a highly-reliable ventilation fan in which a power supply line is connected within an outside hood for ease of construction and maintenance, and a terminal block is highly resistant to rain.SOLUTION: The ventilation fan includes: a flatbed base 3 that is mounted on an external wall, and has a wind tunnel 2 that is to be inserted, from the outside, into a ventilation hole provided in the external wall of a building; a fan mounting plate 8 that has a ventilation opening 8e, includes an electric box 8c with a water shielding cover 18 for storing the terminal block and the end of a power supply line, supports an air blower comprising a motor 5 and a fan 4, and is detachable from the base 3; and a box-like ventilation hood 9 that has an exhaust opening in the bottom, and detachably engages with the base 3 to cover the base 3, the air blower, the electric box 8c, and the fun mounting plate 8.

Description

  The present invention relates to a ventilation fan that is attached to a ventilation hole such as a duct or a pipe communicating indoors and outdoors from the outdoor side and ventilates indoor air.

  2. Description of the Related Art Conventionally, there is a ventilation fan that is provided on the outdoor side of a ventilation hole that communicates indoors and outdoors and ventilates the room. This type of ventilation fan is equipped with a ventilation hood to prevent rain and wind, and a ventilation fan consisting of a motor and a fan inside the ventilation hood. Compared to a ventilation fan for a duct installed in a simple manner, it can be installed easily (see, for example, Patent Documents 1 and 2).

JP 2006-220396 A JP 2007-327686 A

  However, in the conventional ventilation fan described in the said patent document 1, the power wire is connected inside the wall or indoors. It is difficult to connect the power line inside the wall, and there is a problem that if the connection is made indoors, the degree of freedom of the interior characteristic of this type of ventilation fan is lost.

  In the conventional ventilation fan described in Patent Document 2, the connection of the power line is performed inside the outdoor hood, but there is a problem that the rain resistance of the terminal block is low. If the power line is connected between the outdoor hood and the wall, rain resistance can be improved with relatively easy construction, but the outdoor hood must be removed from the wall during maintenance such as motor replacement. There is a problem that the maintainability is lost.

  The present invention has been made in view of the above, and the connection of the power line is made into the outdoor hood, and the workability and maintainability are good, the rain resistance of the terminal block is high, and a highly reliable ventilation fan is obtained. Objective.

  In order to solve the above-mentioned problems and achieve the object, a flat plate-like base that has a wind tunnel inserted from the outside into a ventilation hole provided in the outer wall of a building, is attached to the outer wall, and a vent hole is provided. An electric box with a water shielding cover that accommodates the terminal block and the end of the power supply line, a fan mounting plate that supports a blower composed of a motor and a fan and is detachable from the base, and an exhaust port at the bottom And a box-shaped ventilation hood that detachably engages with the base and covers the base, the blower, the electric box, and the fan mounting plate.

  According to the present invention, even if the terminal block for connecting the power line and the motor lead is installed in the outdoor hood, the terminal block is accommodated in the electric box with a water shielding cover, Since it prevents the intrusion of rainwater and dust, a highly reliable ventilation fan can be obtained.

FIG. 1 is a side view showing an embodiment of a ventilation fan according to the present invention. FIG. 2 is an exploded perspective view of the ventilation fan according to the embodiment. FIG. 3 is a rear perspective view of the ventilation fan according to the embodiment. FIG. 4 is a perspective view illustrating a method of connecting a power supply line to the ventilation fan according to the embodiment. FIG. 5 is a perspective view showing a state where the electric box is assembled to the fan mounting plate of the ventilation fan according to the embodiment. FIG. 6 is a rear view of the fan assembly as viewed from the fan side. FIG. 7 is a front view of the fan assembly as viewed from the motor side. FIG. 8 is a side view of the fan assembly as viewed from the electric box side.

  Hereinafter, embodiments of a ventilation fan according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment FIG. 1 is a side view showing an embodiment of a ventilation fan 11 according to the present invention. A ventilation duct 1 as a ventilation hole is provided on the outer wall 20 of a building such as a house to ventilate the interior and the exterior. The ventilation duct 1 is usually piped behind the ceiling of each room. However, as shown in FIG. 1, if the wall of the room is the outer wall 20, the ventilation duct 1 may be installed so as to penetrate the outer wall 20.

  A ventilation fan 11 is attached to the outdoor opening end 10 of the ventilation duct 1 from the outdoor side, and indoor air is exhausted outdoors. The ventilation fan 11 includes a flat plate-like base 3 that has a cylindrical wind tunnel 2 inserted into the ventilation duct 1 from the outdoor side and is attached to the outer wall 20, and a fan that includes a motor 5 and a fan 4. 2), and a fan assembly 12 that can be attached to and detached from the base 3, and a ventilation hood 9 that is detachably engaged with the base 3 and covers the base 3 and the fan assembly 12.

  The fan assembly 12 has a motor 5 that rotates a three-blade propeller fan 4, a motor cover 6, and an electric box 8c (see FIG. 2) assembled to the fan mounting plate 8 (see FIG. 2). Is.

  FIG. 2 is an exploded perspective view of the ventilation fan 11 according to the embodiment. With reference to FIG. 2, the structure of the ventilation fan 11 of embodiment is demonstrated in detail. The base 3 is formed in a rectangular shape as a whole, and the side plate 3f is formed by bending three sides of the upper side excluding the lower side and both side sides at right angles to the opposite side of the outer wall 20 among the four sides.

  The flat back plate 3c of the base 3 is provided with a large-diameter hole substantially at the center, and a cylindrical wind tunnel 2 is attached to the large-diameter hole. The back plate 3c is provided with an attachment hole (not shown) for attaching the base 3 to the outdoor wall surface 14 (see FIG. 1) with a wood screw or the like.

  The wind tunnel 2 is fixed to the base 3 by a flange 2 a provided at one end, and the other end is inserted from the outdoor opening end 10 of the ventilation duct 1 and connected to the ventilation duct 1. The base 3 is attached to the outdoor wall surface 14 with wood screws or the like through the attachment holes.

  The ventilation hood 9 has an upper side plate and left and right side plates, and is formed in a rectangular box shape that opens to the base 3 side and the lower side. As shown in FIG. 1, an exhaust gallery 9a is attached to the lower opening (exhaust port 9b). The exhaust gallery 9a includes a frame portion (not shown) and several downward blades connected to the frame portion.

  The ventilation hood 9 is provided at the frame portion of the exhaust gallery 9a attached to the lower exhaust port 9b by engaging the engagement concave portion 9c of the upper plate with the engagement convex portion 3d provided on the upper plate of the base 3. The base 3 is attached to the screw hole 3e of the base 3 with a screw 9d through the mounting hole. The ventilation hood 9 can be easily removed from the base 3 by removing the screw 9d.

  Next, the fan assembly 12 will be described with reference to FIGS. 2 and 5 to 8. FIG. 5 is a perspective view showing a state where the electric box 8c is assembled to the fan mounting plate 8. FIG. 6 is a rear view of the fan assembly 12 as viewed from the fan 4. FIG. FIG. 8 is a side view of the fan assembly 12 as viewed from the electric box 8c side.

  The fan mounting plate 8 has a disk portion 8a having a vent 8e at the substantially center. The disk portion 8a is fixed to the back plate 3c of the base 3 with screws. The fan mounting plate 8 can be removed from the base 3 by removing the screws. The disk portion 8 a is provided with a plurality of motor support legs 8 b that support the motor 5. The motor support leg 8b is connected to a substantially conical motor front cover 6a located at the center of the vent 8e. The motor front cover 6 a covers the drive shaft side of the motor 5.

  The motor 5 is fixed to the motor support leg 8 b with a screw, and the drive shaft is perpendicular to the outdoor wall surface 14. Three motor support legs 8b are provided. Screw fixing holes 5a are provided at three locations on the outer periphery of the motor 5, and the motor 5 is fixed to the motor support leg 8b with screws via the three screw fixing holes 5a.

  The electric box 8 c is disposed at the right end of the fan mounting plate 8. The electric box 8 c is in contact with the back plate 3 c of the base 3. The inside of the electric box 8c is isolated from the air path of the vent 8e. If the ventilation hood 9 is removed, the front surface of the electric box 8c is open so that the power line 7a can be connected.

  In addition, the electric box 8c is provided with a terminal block storage portion 8n at the upper portion and a power line lead-in portion 8o at the lower portion. The bottom of the electric box 8c on the base 3 side is provided with openings for the terminal block storage portion 8n and the power line lead-in portion 8o. A partition plate 8j is provided vertically at the center of the terminal block storage portion 8n. The left and right side plates of the electric box 8c and the partition plate 8j are provided with claws for holding the terminal block 7, and the rectangular parallelepiped terminal block 7 can be inserted from the opening on the base 3 side and held by the claws. . Since the partition plate 8j can maintain a constant distance between the two terminal blocks 7, the tracking strength can be improved.

  On the front side of the terminal block 7, a wall 8 q that uniformly covers the terminal block 7 is provided except for the power line connecting portion of the terminal block 7. Even if rainwater enters the electric box 8c, it is possible to prevent the rainwater from entering the charging portion of the terminal block 7 by the wall 8q.

  A motor lead guide 8m on a semi-cylinder that extends in the horizontal direction and communicates with the terminal block storage portion 8n is provided on the top of the disk portion 8a. The motor lead is connected to the terminal block 7 through the inside of the motor lead guide 8m. The motor lead guide 8m extends to the vicinity of the center of the fan mounting plate 8 and prevents rainwater that has entered from the exhaust gallery 9a from entering the terminal block storage portion 8n.

  The terminal block 7 is housed in the terminal block housing portion 8n so that the motor lead connection port is at the top and the power supply wire 7a connection port is at the bottom, and the end of the power wire 7a drawn from the bottom of the electric box 8c is , Connected to the upper terminal block 7 to supply power to the motor 5. Further, a screw boss 8k is provided in the vicinity of the terminal block storage portion 8n of the electric box 8c. The water shielding cover 18 that shields the inside of the electric box 8c is fastened and fixed to the screw boss 8k of the terminal block housing portion 8n by screws. By providing the screw bosses 8k in the vicinity of the terminal block storage portion 8n, the water blocking degree between the water blocking cover 18 and the electric box 8c in the vicinity of the terminal block 7 is increased. In addition, the waterproof cover 18 is kept waterproof and dustproof by being provided with an overlapping margin with respect to the electric box 8c.

  The upper part of the water shielding cover 18 is located on the terminal block housing portion 8n, and a rib 18a protruding from the water shielding cover 18 to the ventilation hood 9 side by about 5 mm is provided at the upper end of the water shielding cover 18. The ribs 18a prevent rainwater entering from the exhaust gallery 9a in the manner of turning back. Ribs 8p are also provided in the terminal block storage portion 8n along the ribs 18a, and the ribs 8p serve as traps for rainwater falling from the top of the ventilation hood 9. With the above structure, rainwater intrusion from the contact portion between the water shielding cover 18 and the terminal block storage portion 8n is prevented. Further, as shown in FIG. 7, the rain resistance is improved by forming the contact portion between the rib 18 a of the water shielding cover 18 and the rib 8 p of the terminal block storage portion 8 n in a bowl shape.

  The water shielding cover support 8i (see FIG. 2) is provided at the lower part of the electric box 8c and has a key claw shape. When the cylindrical protrusion 18b (see FIG. 7) of the water shielding cover 18 is fitted into the key claw of the water shielding cover support 8i, the water shielding cover 18 connects the contact between the cylindrical protrusion 18b and the water shielding cover support 8i. It can be turned up and down as a fulcrum and can be opened and closed. If the center of gravity of the water shielding cover 18 is positioned outside the fulcrum and the screw is removed, the water shielding cover 18 is opened downward by gravity. Further, when the water shielding cover 18 is opened, it is positioned below the screw hole 3e (see FIG. 2) of the base 3 and interferes with the ventilation hood 9, so that the ventilation hood 9 cannot be attached to the base 3. ing. Thereby, after connecting work of the power supply line 7a at the time of construction, forgetting to tighten the water shielding cover 18 can be prevented, and safety can be improved.

  An outer edge portion 8g (see FIG. 2) of the disk portion 8a of the fan mounting plate 8 protrudes by about 4 mm toward the base 3, and a concave surface having a depth of about 2 mm is formed inside. Further, a flange 2 a that is joined to the base 3 is provided at the end of the wind tunnel 2 on the base 3 side. The outer edge of the flange 2a is accommodated inside the outer edge portion 8g to absorb the thickness of the flange 2a. The vent 8e is formed in a circular shape having substantially the same diameter as the inner diameter of the wind tunnel 2, and the inner edge 8h of the vent 8e has a bell mouth shape of about R1.5. 1)), the pressure loss of the airflow flowing into the airflow is reduced.

  The fan 4 is a propeller fan having three blades, and the drive shaft of the motor 5 is press-fitted into the central boss portion. As the fan 4 rotates, room air passes through the ventilation duct 1 and enters the hood interior 16 of the ventilation hood 9 from the vent 8e. An exhaust gallery 9 a is attached to the lower part of the ventilation hood 9, and air is exhausted from the inside 16 of the ventilation hood 9 through the exhaust gallery 9 a to the outside of the ventilation hood 9. The several blades of the exhaust gallery 9a are inclined so that the exhaust 17 faces in a direction away from the outdoor wall surface 14.

  As described above, the motor 5, the fan 4, and the terminal block 7 are assembled integrally with the fan mounting plate 8 and assembled as a fan assembly 12. The fan assembly 12 is detachably attached to the base 3. Therefore, if it is the ventilation fan 11 having the base 3 of the wind tunnel 2 of the same diameter, it can be mounted as it is, a compact ventilation fan can be obtained, and it can be combined with a ventilation hood 9 having a different shape depending on the application. Is possible. Further, since the base 3 and the fan assembly 12 are separate, the fan mounting plate 8 can be made of resin to reduce the weight, and the base 3 can be made of metal. In particular, when fixing to the outdoor wall surface 14, the base 3 can be made of metal, so that the wall surface strength can be ensured, and only the fan assembly 12 can be removed for easy maintenance and replacement. Long-term durability is improved because maintenance can be performed easily.

  As shown in FIG. 1, an exhaust gallery 9a is provided at the exhaust port 9b at the bottom of the ventilation hood 9, but as shown in FIGS. 2 and 5, the fan mounting plate 8 is provided with the exhaust gallery 9a. A plurality of fin-like guards 8d are provided at locations facing the vent holes 8e of the fan mounting plate 8. The guard 8d is for protection so as not to touch the blades of the fan 4 even if a finger or the like is inserted from the exhaust gallery 9a. Each of the plurality of guards 8d is provided with an opening 8f for forming an air passage from the vent 8e to the exhaust gallery 9a.

  Further, a substantially conical motor front cover 6a connected to the three motor support legs 8b is provided substantially at the center of the vent hole 8e. This motor front cover 6a is shaped to wrap around about half of the drive shaft side of the motor 5, and is fitted with an overlap allowance with a rear cover 6b formed of a separate part so that rainwater or the like enters from the outside. The motor 5 is entirely covered so that the motor 5 is not applied to the motor 5.

  By providing the protective guard 8d on the disk portion 8a facing the vent hole 8e of the fan mounting plate 8, the pressure loss can be reduced as compared with the case where a metal net or the like is installed in the exhaust gallery 9a or the fan assembly 12. Moreover, even if a finger or a rod is inserted from the exhaust gallery 9a of the ventilation hood 9, the fan 4 is not touched, and the fan 4 is prevented from being damaged, and the ventilation fan 11 is installed at a low position where children can reach. Even if it is, it is highly safe. In addition, entry of small animals such as bats can be prevented.

  In addition, a flat packing 19 (see FIG. 2) is attached to the base 3 side at a portion where the terminal block storage portion 8n contacts the base 3. The terminal block storage portion 8n is provided with ribs 8p (see FIG. 6) so as to surround the terminal block 7, and the ribs 8p crush the packing 19 by a certain amount, so that the terminal block 7 is removed from the air path of the vent hole 8e. It is isolated and has high water and dust resistance. With the packing 19, insulation is ensured, and by securing a predetermined insulation distance, a double insulation structure can be obtained, which is highly reliable and improves durability such as rusting of the outer shell of the motor 5, The ground wire from the outer shell of the motor 5 is unnecessary, and the assemblability and workability are improved.

  FIG. 3 is a rear perspective view of the ventilation fan 11 according to the embodiment, and FIG. 4 is a perspective view illustrating a method of connecting the power supply line 7a to the ventilation fan 11 according to the embodiment. As shown in FIG. 3, a skirt portion 3 a that protrudes about 7 mm to 9 mm from the back plate 3 c and contacts the outdoor wall surface 14 is provided on the outer edge portion of the back plate 3 c of the base 3. The back plate 3c is provided with a through hole 3b for drawing the power line 7a into the electric box 8c. As shown in FIG. 4, the end portion of the power supply line 7 a is drawn out from the wall hole 21 of the outdoor wall surface 14, drawn into the electric box 8 c through the through hole 3 b, and connected to the terminal block 7.

  As shown in FIG. 1, a U-shaped groove portion 15 surrounded by an outer edge portion of the back plate 3c, the skirt portion 3a, and the outdoor wall surface 14 is filled with a caulking material, and between the base 3 and the outdoor wall surface 14 Stop water. Since a continuous groove portion 15 having a height of 7 mm to 9 mm is formed on the outdoor wall surface 14 side of the base 3, the groove portion 15 serves as a guide for the tip of a nozzle (diameter 5 mm to 6 mm) to which the caulking material is applied. Easy and reliable caulking.

  Further, the ventilation hood 9 can be removed from the base 3, is not fixed to the wall surface by the caulking material, is detachable from the base 3, and it is not necessary to cut the caulking material when removing the ventilation hood 9. The inside of the hood 16 of the ventilation hood 9 and the maintenance of the fan assembly 12 can be easily performed from the outdoor side.

  As described above, the ventilating fan according to the present invention is useful as a ventilating fan that is attached to a duct, pipe, or the like that communicates indoors and outdoors from the outside.

1 Ventilation duct (ventilation hole)
2 Wind tunnel 2a Flange 3 Base 3a Skirt 3b Through hole 3c Back plate 3d Engaging projection 3e Screw hole 3f Side plate 4 Fan (propeller blade)
5 Motor 6 Motor cover 6a Motor front cover 6b Motor rear cover 7 Terminal block 7a Power line 8 Fan mounting plate 8a Disk part 8c Electric box 8b Motor support leg 8d Guard 8e Vent 8f Opening 8g Outer edge 8h Inner edge 8i Water shielding cover Support part 8j Partition plate 8k Screw boss 8m Motor lead guide 8n Terminal block storage part 8o Power line lead-in part 8p Rib 8q Wall 9 Ventilation hood 9a Exhaust louver 9b Exhaust port (opening)
9c Engaging recess 9d Screw 10 Outdoor open end 11 Ventilation fan 12 Fan assembly 14 Outdoor wall surface 15 Groove portion 16 Inside of hood 17 Exhaust 18 Water shielding cover 18a Rib 18b Cylindrical protrusion 19 Packing 20 Outer wall 21 Wall hole

Claims (8)

A flat plate-like base attached to the outer wall, having a wind tunnel inserted from the outdoor side into a ventilation hole provided in the outer wall of the building;
A fan mounting plate having a vent hole and having an electric box with a water shielding cover for accommodating the terminal block and the end of the power supply line, supporting a blower composed of a motor and a fan, and detachable from the base;
A box-shaped ventilation hood having an exhaust port at the bottom and detachably engaging the base to cover the base, the blower, the electric box and the fan mounting plate;
A ventilation fan characterized by comprising.   The ventilation fan according to claim 1, wherein a motor lead guide is provided on an upper portion of the fan mounting plate so as to communicate with a terminal block housing portion at an upper portion of the electric box and to pass a motor lead wire of the motor.   The ventilation fan according to claim 1, wherein a partition plate for partitioning the plurality of the terminal blocks is provided in a terminal block housing part at an upper part of the electric box.   A rib projecting toward the ventilation hood is provided on the upper portion of the terminal block storage portion at the top of the electric box, and when the terminal block storage portion is covered with the water shielding cover, the upper end portion of the water shielding cover is The ventilation fan according to claim 1, wherein the ventilation fan is brought into contact with a rib.   The ventilation fan according to claim 4, wherein a rib projecting toward the ventilation hood is provided at an upper end portion of the water shielding cover, and the rib of the terminal block housing portion and the rib of the water shielding cover are brought into contact with each other. .   The ventilation fan according to claim 5, wherein the rib of the terminal block storage portion and the rib of the water shielding cover are formed in a bowl shape.   The ventilation fan according to claim 1, wherein a screw boss for screwing the water shielding cover is provided in a terminal block housing part at an upper part of the electric box.   Provided at the lower part of the electric box is a water shielding cover support portion that supports the water shielding cover so as to be rotatable up and down. When the water shielding cover is not screwed to the screw boss, the water shielding cover is not self-weighted. The ventilation fan according to claim 7, wherein the ventilation hood cannot be mounted by interfering with the ventilation hood.

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