JP5533243B2 - Recessed ceiling ventilation fan - Google Patents

Description

  The present invention relates to a ceiling-embedded exhaust fan that is attached mainly to a ceiling surface of a bathroom, communicates the outside and a main body with a duct, and ventilates air in the bathroom.

  Conventionally, what was described in patent document 1 is known as an example of this kind of ceiling-embedded ventilation fan.

  The ceiling-embedded ventilation fan will be described below with reference to FIG.

  As shown in FIG. 8, an electric motor 103 is fixed above the inside of the main body case 102 of the ventilation fan main body 101. A blower blade 105 is fixed to the rotating shaft 104 of the electric motor 103 to form an electric blower. The blower blade 105 is disposed in the intake chamber formed at the outer edge side standing portion of the casing 106, and sucks room air from an orifice-shaped intake port 107 positioned below the intake chamber. It exhausts from the exhaust port 108 located in the direction to the outdoors. The lower side of the blower blade 105 is covered with a bottom portion 106a of the casing 106 in which the air inlet 107 is formed.

Japanese Patent No. 2826247

  In such a conventional ceiling-mounted ventilation fan, condensed water generated inside the casing 106 of the ceiling-mounted ventilation fan attached to the bathroom is discharged from the duct 109, but the condensed water generated outside the duct 109 is discharged from the bathroom. There is a problem of dripping inside and falling on the user taking a bath.

  The present invention solves such a conventional problem, suppresses the generation of condensed water in parts other than the duct of a ceiling-embedded ventilation fan installed in a bathroom, and the condensed water is generated for a user who is taking a bath. An object of the present invention is to provide a ceiling-mounted ventilation fan that can prevent falling down.

  In order to achieve this object, the present invention includes a box-shaped frame that is inserted and attached to the back of the ceiling and has an opening facing the indoor side on the lower surface, and a suction port on the lower surface in the frame. A scroll-shaped casing having a discharge port on a side surface, a centrifugal blower blade disposed in the casing, and an adapter having a protruding shape connected to the discharge port and a duct on one side surface of the frame; A casing cover having an orifice that covers the opening from the indoor side and is detachably mounted, and an electric motor that rotationally drives the centrifugal blower blade on the top surface of the frame and that forms the suction port A ceiling-embedded ventilation fan provided so as to cover the suction port on the lower surface of the casing, wherein an inclined shape portion is formed on at least one of the surfaces forming the outer shell of the frame. Only, which was provided with a power connection in the vicinity of the motor above the top surface of the frame, thereby is to achieve the intended purpose.

  According to the present invention, a box-shaped frame that is inserted and attached to the back of the ceiling and has an opening facing the indoor side on the lower surface, and a scroll that has a suction port on the lower surface and a discharge port on the side surface in the frame. A cylindrical casing, a centrifugal blower blade disposed in the casing, an adapter having a protruding shape connected to the discharge port and a duct on one side of the frame, and the opening from the indoor side A decorative cover panel that is detachably mounted and an electric motor that rotationally drives the centrifugal blower blade is provided on the top surface of the frame, and a casing cover that has an orifice that forms the suction port is provided on the lower surface of the casing. A ceiling-embedded ventilation fan provided to cover the mouth, wherein an inclined shape portion is provided on at least one of the surfaces forming the outer shell of the frame, and the top surface of the frame is By providing a power supply connection in the vicinity of the motor, it is possible to suppress the generation of condensed water in parts other than the duct of the ceiling-mounted ventilation fan installed in the bathroom, and to prevent the condensed water It is possible to obtain an effect that it is possible to prevent from falling.

The exploded perspective view which shows the component structure of the ceiling embedded type ventilation fan of Embodiment 1 of this invention from the downward direction The exploded perspective view which shows the components composition of the ventilation device from the upper part Sectional drawing which shows the attachment state of the ventilation device Side view showing the installation process state of the ventilator The perspective view which shows the packing member of the junction part of the frame and adapter of the ventilation apparatus The perspective view which shows the uneven | corrugated shape of the junction part of the flame | frame and adapter of the ventilation apparatus Sectional drawing which shows the uneven shape of the joint part of the frame and adapter of the ventilation device Sectional drawing which shows the ceiling embedded type ventilation fan attached to the conventional bathroom

Ventilation apparatus of the present invention is mounted is inserted into the ceiling, closed and box-like frame having an opening facing the lower surface to the indoor side, in the frame, a discharge port side has an inlet on the lower surface A scroll-shaped casing, a centrifugal blower blade disposed in the casing, an adapter having a protruding shape connected to the discharge port and a duct on one side of the frame, and the opening in the chamber A decorative cover that is detachably mounted covering from the inside, and an electric motor that rotationally drives the centrifugal blower blades are provided on the top surface of the frame, and a casing cover having an orifice that forms the suction port is provided on the lower surface of the casing. A ceiling-embedded ventilation fan provided so as to cover the suction port, wherein a sloped portion is provided on at least one of the surfaces forming the outline of the frame, and the top surface of the frame It has a structure that is provided with power connections in the vicinity of the motor. This makes it possible to reduce the surface area of the outer frame of the frame by making at least one surface forming the outer frame of the frame an inclined shape part, to reduce the area that can be a temperature boundary between the bathroom space and the ceiling space, and to By arranging the connection part on the top surface, the power line that supplies power to the motor is not drawn into the frame, so there is no need to provide a power supply hole in the frame, and cold air can enter the frame. Therefore, it is possible to suppress the generation of dew condensation water generated in a portion other than the duct of the ceiling-embedded ventilation fan attached to the bathroom, and to prevent the dew condensation water from falling on the user during bathing.

  Moreover, you may make it the structure which arrange | positions an inclined shape part in the position facing the surface which has an adapter, and inclines to the said adapter side as it goes upwards. This makes it possible to insert the adapter with the protruding shape into the ceiling, and then rotate it to insert the main body into the ceiling. Since the ventilation fan is attached, the ceiling-embedded ventilation fan can be attached without removing the adapter, and the workability can be improved.

  Moreover, you may make it the structure which formed the top | upper surface with the board of the steel plate larger than the magnitude | size of the outline of an electric motor, and smaller than the magnitude | size of a scroll-shaped casing. This reduces the area of the steel plate, reduces the conduction of cool air into the frame, and reduces the amount of condensed water generated from the top surface of the frame. There is an effect that the generation amount of can be reduced.

  Also, a resin plate is provided at the bottom of the top surface, a hole that is slightly larger than the size of the outer shell of the motor is provided in the resin plate, and the motor is fixed to the top surface through the hole. May be. This prevents cold air from being conducted into the frame by the resin plate and reduces the amount of condensed water generated from the top surface of the frame, thus reducing the amount of condensed water generated from the top surface of the frame. There is an effect that can be.

  In addition, the top surface is formed of a resin plate, the resin plate is provided with a hole that is slightly larger than the outer size of the motor, and the motor is fixed to the top surface through the hole. Also good. This prevents cold air from being conducted into the frame by the resin plate and reduces the amount of condensed water generated from the top surface of the frame, thus reducing the amount of condensed water generated from the top surface of the frame. In addition, the ceiling-embedded ventilation fan can be reduced in weight and cost can be reduced.

  Further, the casing and the frame may be formed of the same component, and the casing cover having the orifice may be attached from the lower surface on the indoor side so as to cover the suction port on the lower surface of the casing. As a result, the casing and the frame are formed of the same part, so that the seam of the part is reduced, and the intrusion of cold air from the seam of the part and the generated condensed water are prevented from flowing out from the seam of the part. In addition, since the casing cover is attached from the lower surface on the indoor side, even if the casing cover remains attached, removing the casing cover from the indoor side facilitates maintenance and replacement of the blades. The amount of generation can be reduced, and the maintainability of the ceiling-mounted ventilation fan can be improved.

  Further, the height of the bell mouth of the orifice provided in the casing cover may be set higher than the height of the bottom surface of the cylindrical shape at the tip of the adapter. As a result, the height of the bell mouth is made higher than the height of the bottom of the cylindrical shape at the tip of the adapter, and the condensed water generated in the casing passes through the outlet and duct from the frame before dropping outside the bell mouth and into the bathroom. As a result, it is possible to prevent the condensed water from falling on the user who is taking a bath.

  Moreover, you may make it the structure that the moisture absorbing material was affixed on the inner bottom face of the casing cover. Accordingly, the condensed water is absorbed by the hygroscopic material and the dripping water is prevented from dripping. Therefore, there is an effect that the condensed water can be prevented from falling on the user who is taking a bath without using a separate member.

  Further, the main plate of the centrifugal blower blade may be configured to completely cover the electric motor when viewed from the lower surface. As a result, the motor is covered with the centrifugal blower blades, reducing the risk of moisture contact with the motor surface and preventing the generation of rust and condensed water. Condensed water falls on the user during bathing without using a separate member. There is an effect that can be prevented.

  Moreover, you may make it the structure of closing the lower end of the boss | hub shape provided in the center of the centrifugal blowing blade, press-fitting in the shaft of an electric motor, and fixing. As a result, the lower end of the boss shape provided at the center of the centrifugal blower blade is closed, press-fitted into the shaft of the electric motor and fixed, and it is not necessary to use a metal nut or another member for fixing the centrifugal blower blade. This prevents the shaft from being exposed to the bathroom space and prevents condensation from occurring near the blade fixing part due to heat conduction from the back of the ceiling. There is an effect that it can be prevented.

  Moreover, you may make it the structure that the coating which prevents a dirt was provided in the surface of the centrifugal blowing blade. This prevents dust from adhering to the centrifugal fan even if the centrifugal fan is not cared for, and prevents dust from adhering to reducing the air volume and increasing the rotational speed. There is an effect that an increase in noise can be prevented by pressure loss.

  Further, as a fitting means for the adapter and the frame, a structure in which a claw shape is provided on either one, a hole shape in which the claw shape is fitted is provided at an opposite location, and a packing member is attached around the fitting portion. It may be. As a result, the adapter and the frame are provided with fitting claws, the frame and the adapter are brought into close contact with each other, and a packing member is attached around the fitting portion to prevent cold air from entering the frame from entering the frame. As a result, generation of condensed water is prevented, so that the amount of generated condensed water can be reduced.

  In addition, the adapter and the frame have a concave and convex shape corresponding to the joint portion between the adapter portion and the frame, and the adapter and the frame are slid up and down by a claw-shaped portion provided on the adapter portion side. May be configured to be removable. As a result, the connection between the adapter and the frame becomes a maze structure, so that cold air from outside the frame is prevented from entering the frame, and consequently, the generation of condensed water is prevented. There is an effect that can be done.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
As shown in FIGS. 1 to 3, a box-shaped frame 3 that is inserted and attached to the ceiling 1 and has an opening 9 facing the indoor side 2 on the lower surface, and a suction port 4 on the lower surface in the frame 3. And a scroll-shaped casing 6 having a discharge port 5 on the side surface, a centrifugal blower blade 7 disposed in the casing 6, and a protruding shape connected to the discharge port 5 and a duct on one side surface of the frame 3. The top surface 12 of the frame 3 includes an adapter 8 having an opening 9, a decorative panel 10 that covers the opening 9 from the indoor side 2 and is detachably mounted, and an electric motor 11 that rotationally drives the centrifugal blower blades 7. A ceiling-embedded ventilation fan provided with a casing cover 14 having an orifice 13 to be formed so as to cover the suction port 4 on the lower surface of the casing 6, and inclined to at least one of the surfaces forming the outline of the frame 3 Shape part 15 Only, the top surface 12 of the frame 3, larger than the outer size of the electric motor 11, has a configuration which is formed of a plate of smaller steel than the size of the scroll-shaped casing 6.

  Further, the power supply connection portion 16 to the electric motor 11 that rotationally drives the centrifugal blower blade 7 is configured in the vicinity of the electric motor 11 on the top surface 12 of the frame 3. In the centrifugal blower blade 7, the main plate 17 of the centrifugal blower blade 7 completely covers the electric motor 11 when viewed from the lower surface, closes the lower end of the boss shape 18 provided at the center of the centrifugal blower blade 7, and The shaft 19 is press-fitted and fixed, and the surface of the centrifugal blower blade 7 is provided with a coating for preventing contamination.

  Further, the height of the bell mouth 20 of the orifice 13 provided in the casing cover 14 is made higher than the height of the cylindrical lower surface 21 at the tip of the adapter 8, and the hygroscopic material 22 is attached to the inner bottom surface of the casing cover. And

  Further, as shown in FIGS. 5 and 6, as a fitting means for the adapter 8 and the frame 3, a claw shape 23 is provided on one of them, and a hole shape 24 into which the claw shape is fitted is provided at an opposite location, It is set as the structure which affixed the packing member 25 around this fitting part.

  With the above configuration, by forming at least one surface forming the outline of the frame 3 as an inclined shape portion, the surface area of the outline of the frame 3 can be reduced, and the area that can be a temperature boundary between the bathroom space and the ceiling space is reduced. Therefore, the amount of condensed water generated from the frame 3 can be reduced. Further, as shown in FIG. 4, the inclined portion 15 described above is disposed at a position facing the surface having the adapter 8, and has a protruding shape by being inclined toward the adapter 8 as it goes upward. When the main body is inserted into the ceiling 1 by rotating the adapter 8 first after inserting it into the ceiling 1, the embedded embedded ventilation fan is not caught in the opening hole 26 provided in the ceiling by the formed inclined portion 15. As a result, it is possible to perform the installation in a short time without removing the adapter 8.

  Further, by reducing the area of the steel plate having a high thermal conductivity constituting the top surface 12, it is possible to greatly reduce the conduction of cold air into the frame 3, thereby suppressing the occurrence of condensation. The effect can be further enhanced. Also, a resin plate 27 is provided below the top surface 12, a hole that is slightly larger than the outer size of the motor 11 is provided in the resin plate 27, and the motor 11 is fixed to the top surface 12 through the hole. By doing so, it becomes difficult for the cool air in the ceiling space to be conducted into the frame 3 by the resin plate having a low thermal conductivity, so that an effect of suppressing further condensation is expected. When the above-described resin plate 27 is provided, the same effect can be obtained with respect to suppressing the occurrence of condensation without providing the above-described steel plate, and the cost and weight of the ceiling-embedded ventilation fan can be reduced. The other effects are also synergistically obtained.

  Further, by arranging the power supply connection portion 16 on the top surface 12, the power supply line for supplying power to the electric motor 11 is not drawn into the frame 3, so that it is not necessary to provide a power supply lead hole in the frame. Therefore, the high humidity and warm air generated in the bathroom space and filled in the frame is not cooled and the occurrence of condensation can be suppressed. At the same time, high-humidity air in the bathroom does not flow out into the ceiling space, so the dryness of the ceiling space can be maintained, and further safety of the power connection 16 disposed in the ceiling space is ensured. can do. In addition, the adverse effect of moisture is suppressed on the building materials in the ceiling space.

  Further, by covering the electric motor 11 with the main plate 17 of the centrifugal blower blade 7 and covering the shaft 19 of the electric motor 11 with the closed boss shape 18, it becomes difficult for moisture to contact the surface of the electric motor 11 and the shaft 19, and rust and condensation Can be suppressed. Further, the centrifugal air blowing blade 7 that is less likely to adhere dust due to the coating makes it difficult for the air blowing efficiency of the blade to decrease even during long-term use, and prevents the blade rotation speed from increasing due to dust adhesion and noise from increasing. be able to. The above-described effect of the coating can be obtained by adding an additive that has an antistatic effect and reduces the risk of dust adhesion due to static electricity when the centrifugal blower blade 7 is formed.

  Further, by making the height of the bell mouth 20 of the orifice 13 provided in the casing cover 14 higher than the height of the cylindrical lower surface 21 at the tip of the adapter 8, the dew condensation water generated in the casing 6 is continuously used. Even if it accumulates in the orifice 13, it will be discharged to the outside through the tip of the adapter and duct lower than the bell mouth 20 before dropping into the bathroom beyond the height of the bell mouth 20. become. Moreover, by setting it as the structure which affixed the moisture absorption material 22 on the inner bottom face of the casing cover 14, water retention power increases and it becomes possible to prevent the condensation water dripping into a bathroom more reliably. Moreover, the water | moisture content absorbed by this hygroscopic material can evaporate by ventilation of a ceiling embedded type ventilation fan, and can be given the characteristic that it can be used repeatedly.

  Further, the adapter 8 and the frame 3 are provided with a claw shape 23 for fitting, the frame and the adapter are brought into close contact with each other, and a packing member 25 is attached around the fitting portion, so that cold air from the outside of the frame 3 is removed from the frame 3. It is possible to prevent intrusion into the inside, and as a result, generation of condensed water can be prevented. In addition, since the fitting claw shape 23 can hold the frame 3 and the adapter 8 together when the ceiling-embedded ventilation fan is installed, the frame 3 is provided with the inclined shape portion 15. It can be said that using it together is very effective. In addition, since the fitting between the frame 3 and the adapter 8 can be removed without a tool as necessary, the structure is effective in every construction scene. Instead of the packing member 25 affixed around the above-mentioned fitting portion, it has a convex and concave shape 28 corresponding to the joining portion between the adapter portion and the frame, and the joining means between the adapter 8 and the frame 3 slides up and down. Even when the adapter 8 and the frame 3 are removable, the junction between the adapter 8 and the frame 3 has a labyrinth structure as shown in FIG. 7, so that the effect of suppressing the generation of condensed water can be obtained. At the same time, since there is no concern about the deterioration of the packing member 25 over time, a low-cost and highly reliable structure can be obtained.

  As described above, according to the ceiling-embedded exhaust fan of the first embodiment of the present invention, the generation of condensed water generated in a portion other than the duct of the ceiling-embedded exhaust fan attached to the bathroom is suppressed, so It is possible to prevent the condensed water from falling. In addition, the amount of condensed water generated from the top surface of the frame can be reduced. In addition, it is possible to install a ceiling-embedded ventilation fan without removing the adapter, improving workability and reducing the reduction in blowing efficiency due to dust adhering to the blades even during long-term use, increasing noise. This also prevents the user from taking care of the user.

(Embodiment 2)
The second embodiment is different from the first embodiment in that the casing 6 and the frame 3 are formed of the same component, and the casing cover 14 having the orifice 13 is provided so as to cover the suction port 4 on the lower surface of the casing 6. The difference is that it is configured to be mounted from the inside lower surface.

  With the above-described configuration, the casing 6 and the frame 3 are formed of the same component, so that the number of joints between the components is reduced, and intrusion of cold air from the joints of the components and the generated condensed water are prevented from flowing out from the joints of the components. Further, since the casing cover 14 is attached from the lower surface on the indoor side, the centrifugal blower blade 7 can be easily maintained and replaced by removing the casing cover 14 from the indoor side even in the attached state.

  Thus, according to the ceiling-embedded ventilation fan of Embodiment 2 of the present invention, the amount of condensed water generated from the inside of the frame can be reduced, and the maintainability of the ceiling-embedded ventilation fan can be improved. It will be possible.

  Since the ceiling-embedded ventilation fan according to the present invention can reduce dripping of condensed water, it is used in a bathroom and is useful as a ventilation fan having a scroll shape embedded in a ceiling and a centrifugal fan blade. is there.

DESCRIPTION OF SYMBOLS 1 Ceiling back 2 Indoor side 3 Frame 4 Suction port 5 Discharge port 6 Casing 7 Centrifugal blower blade 8 Adapter 9 Opening 10 Cosmetic panel 11 Electric motor 12 Top surface 13 Orifice 14 Casing cover 15 Inclined shape part 16 Power supply connection part 17 Main board 18 Boss shape DESCRIPTION OF SYMBOLS 19 Shaft 20 Bellmouth 21 Cylindrical lower surface 22 Hygroscopic material 23 Claw shape 24 Hole shape 25 Packing member 26 Opening hole 27 Resin plate 28 Uneven shape

Claims (1)

A box-shaped frame that is inserted and attached to the back of the ceiling and has an opening facing the indoor side on the lower surface; a scroll-shaped casing having a suction port on the lower surface and a discharge port on the side surface in the frame; A centrifugal blower blade disposed in the casing, an adapter having a protruding shape connected to the discharge port and the duct on one side surface of the frame, and the opening covering the interior from the interior side is detachably mounted. A decorative panel and an electric motor that rotationally drives the centrifugal blower blade on the top surface of the frame, a casing cover having an orifice that forms the suction port covers the suction port on the lower surface of the casing, and the frame An inclined shape portion is provided on at least one of the surfaces forming the outer shell, and a power connection portion is provided in the vicinity of the electric motor on the top surface of the frame. Has an uneven shape corresponding to the connecting portion between the frame and the adapter, the connecting means between the frame and the adapter, the claw-shaped portion provided on the adapter side and the adapter is slid up and down with the frame ceiling embedded type ventilation fans characterized in that the removable and the labyrinth structure.

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