JPH09273790A - Suction type ventilating fan device equipped with reversible ventilating fan - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce noise and diameter of a duct by a method wherein a reversible ventilating fan, whose opposing rotary vanes arranged in a direction orthogonal to the flow direction of air are rotated in reverse, is arranged at the outdoor side end of an air flow passage to discharge indoor air to the outside of a room. SOLUTION: In an apartment house of concrete, the lower part of the floor 1 of an upper stage room is the wall 3, connected to an outer wall, of a lower stage room. A through hole 9 is provided in an inflated part 2 and a ventilating fan 10 is incorporated into the hole 9. Ducts 11, arranged in a space S1 between the inflated part 2 and an indoor surface member 5, and another space S2 between a floor unit 1 and a ceiling surface member 4, are connected to the ventilating fan 10 while a venting grille 12b, faced to the lower stage room from the ceiling surface member 4, is connected to the other end of the duct 11. An air flow passage 15, guiding indoor air to the outside of the room, is formed. The ventilating fan 10 is arranged at the outside of the room and the motor 34 of the ventilating fan 10 is positioned at a place far from the inside of the room whereby noise, invading into the room, can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilating fan device that can be used for ventilation of the interior of a building such as an apartment house,
More specifically, the present invention relates to a suction type ventilation fan device including a ventilation fan in which opposing rotary blades rotate in opposite directions.

[0002]

2. Description of the Related Art Conventionally, a ventilation fan device is provided in a building for ventilation in a room. (1) This ventilation fan device is composed of an air flow passage formed to include a duct that guides indoor air to the outside of the room, and a ventilation fan that is arranged at an indoor end of the air flow passage and blows with a rotary fan. ing.

(2) Further, the present inventor has found that the ventilation fan has a disk-shaped fan body, an opening portion formed in the fan body portion, and a blade portion that covers the opening portion by opening an air passage portion. A ventilating fan device including a ventilating fan including and, the ventilating fan being arranged at the outdoor end of the airflow passage was developed, and a patent application was previously filed.

[0004]

In the ventilation fan device of the above (1), since the ventilation fan is disposed at the indoor end of the air flow passage, the noise of the motor for rotating the fan enters the room. In addition, the ventilation fan is a push type that pushes in and compresses the air in the duct from the rear side and discharges it.Therefore, the amount of air commensurate with the blowing capacity of the rotary fan and the output of the motor If it is not discharged from the outdoor end of the passage, the original air volume energy is converted into the sound energy that vibrates the duct and the like, which is reduced by the air resistance of the inner surface of the duct, and moreover, pulsation occurs in the air.
This again becomes a resistance, so that a predetermined air volume cannot be obtained. Therefore, there is a problem that the diameter of the duct must be increased and noise is generated.

Since the ventilation fan device of the above (2) uses a single fan and the rotary fan is formed in a disk shape, it lacks pressure energy for advancing air. Since a predetermined air volume was not obtained, it was not industrially applicable.

According to the present invention, the rotating blades facing each other can be reversely rotated at the same speed by a single motor, so that the motor and the swirling flow do not interfere with the blowing and the blowing ability is not deteriorated. In addition, in a load state in which a duct or the like is connected, a fan capacity that surely obtains a desired air volume corresponding to the load is obtained, and by adopting a suction type, noise can be reduced more than before and the duct An object of the present invention is to provide a ventilation fan device that can reduce the diameter. However, conventionally, the ventilation fan which is a suction type ventilation fan device has not been actually used in industry at all.

[0007]

The structure of the present invention which meets the above-mentioned object has an air flow passage formed by including a duct for guiding the air in the room to the outside, and a ventilation fan arranged in the air flow passage. In the ventilating fan device, the ventilating fan comprises a reversing type ventilating fan that reversely rotates opposing rotary vanes arranged in a direction orthogonal to the air flow direction, and is arranged at the outdoor end of the air flow passage. The indoor air is sucked in and discharged to the outside.

By rotating the opposing rotary vanes in the reverse direction, a desired air volume can be obtained as a suction type ventilation fan. The air to which the swirling energy is applied by one rotary vane is generated by the other rotary vane. It is considered that the swirling air is rectified into a flow in the axial direction and the swirling energy is converted into pressure energy, so that a forward force is applied.

A reversing type axial-flow blower in which opposing rotary blades rotate in the opposite direction is conventionally known. However, since this device rotates each of the opposing rotary vanes by a different motor, it requires two motors.
However, there is a problem in that the cost of air blows becomes higher as the air flow becomes a hindrance to the air flow. Not only that, but in this reversing type ventilation fan, the space between the blades was large and the area of the blades was relatively small, so even if this was used as a suction type ventilation fan, the desired air volume could not be obtained. , It was not actually industrially applicable.

The inventors of the present invention have used the planetary gear device in such a manner that the sun shaft and the outer shell internal gear rotate in opposite directions. It has been conceived that the rotary vanes can be rotated in the reverse direction. However, if the planetary gear device is used as it is, the rotation speed of the sun shaft and the rotation speed of the outer shell internal gear are different, and therefore the opposing rotary blades rotate at different speeds.

In order to obtain a desired air volume as the ventilation fan device, it is preferable that the opposing rotary blades are rotated in reverse at the same speed. This is because when the reverse rotation is performed at different speeds, the swirling flow cannot be sufficiently rectified and the swirling energy cannot be completely converted into the linear pressure energy. In order to rotate the opposite rotary vanes at the same speed in the reverse direction, two planetary gear units with the same speed reduction rate are connected, one planetary gear unit is used as a speed increasing gear, and the other planetary gear unit is used as a speed reducer. Should be used as. By doing so, the input shaft and the output shaft rotate reversely at the same speed, so that the rotating blades fixed to the input shaft and the output shaft can be reversely rotated at the same speed.

[0012] Specifically, the reversing type ventilation fan is connected to the sun shafts of planetary gear units that are coaxially opposed to each other, the carrier plate of one of the planetary gear units is a free, and the other planetary gear unit is The carrier disc of the gear device is fixed, the outer shell internal gear of the planetary gear device of the carrier disc is fixed, and the outer shell internal gear of the other planetary gear device is set as the free, and the one planet One rotating blade is fixed to a member connected to the carrier disk of the gear device, and the other rotating blade is fixed to the free outer shell internal gear or a member connected to the outer shell internal gear. It should be formed.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a vertical sectional view showing a main part of a building to which the ventilation fan device according to the present embodiment is applied. This building is a condominium house made by concrete casting, and a wall portion 3 of the lower floor room is provided below the floor portion 1 of the upper floor room.
Is the outer wall. A ceiling surface material 4 is disposed below the floor portion 1, and indoor surface materials 4 to 7 are disposed inside the bulging portion 2 and the wall portion 3.
Are arranged. By the bulging portion 2 and the interior surface materials 5 and 6,
A beam-shaped portion 8 protruding to the lower floor room is formed.

The bulging portion 2 is provided with a through hole 9 penetrating the bulging portion 2 horizontally, and a ventilation fan 10 is incorporated in the through hole 9. The ventilation fan 10 includes a bulge 2 and an interior surface material 5.
One end of a duct 11 made of a soft pipe is connected to the space S ₁ between the duct 1 and the space S ₂ between the floor 1 and the ceiling surface material 4, and the other end of the duct 11 is connected to the other end. Is connected to the ventilation grill 12 facing the lower floor room from the ceiling surface material 4.

A weather cover 14 having a fire damper 13 is provided at the front portion (outer outdoor portion) of the ventilation fan 10 in the through hole 9.
Therefore, the ventilation fan 10 is hidden by the weather cover 14, and the ventilation fan 10 is not exposed to the outside of the room.

The above-mentioned ventilation grill 12, duct 11, through hole 9 and weather cover 14 form an air flow passage 15 for guiding indoor air to the outside.
A ventilation fan 10 is arranged at the outdoor end of No. 5. The room facing the ventilation grill 12 may be a living room, or of course a toilet, kitchen, bath or the like.

The ventilation fan 10 is a housing body 3 of the ventilation fan.
9a is a rod-shaped bracket 2 which is vertically and horizontally connected to each other.
1 is fixed to the casing 16 and the casing 1
It is locked to the inner surface of the through hole 9 by a plate spring-shaped locking member 17 provided on the plate 6. The casing 16 is divided into two parts, a front part and a rear part, which are connectable and separable. The rear part 16B is provided with a joint part 18 for connecting the duct 11 and an outlet part 19 for connecting an electric cord, and for connecting the duct 11 with the rear part 16B separated from the front part 16A. It can be done.

Since there are a plurality of joints 18,
A plurality of ducts 11 can be connected to one ventilation fan 10. In the illustrated example, since only one duct 11 is connected, the other joint portion 18 to which the duct is not connected is closed by the lid 20. The tips of the rotary shafts 35 and 44 to which the rotary blades 45a and 45b of the ventilation fan 10 are attached are connected to the rotary shaft of the motor 34, and the motor 34 is
Like the ventilation fan 10, it is fixed to the casing 16 by a bracket 21 '. The motor 34 has a rotating shaft 44.
Of course, it may be connected to the rear end.

As shown in FIG. 4, the rotary blades 45a and 45b are arranged such that the distance 50 between adjacent blades in the rotational direction is reduced to increase the total blade area. Further, as shown in FIG. 1, the tips of the rotary blades 45a and 45b are provided with an air flow passage 15 through a casing 16.
(Through hole 9) Close to the inner peripheral surface. By doing so, it is possible to obtain an effective air volume as the suction type ventilation fan. The tips of the rotary blades 45a and 45b may be brought close to the air flow passage directly. It is good to make them as close as possible so that the rotary blades do not come into contact with each other. Further, the area of each blade may be increased by bending adjacent portions of adjacent blades so that there is no spacing in the rotation direction but a spacing in the front-back direction.

Inverted ventilation fan device 1 used in the above embodiment
0'is configured as shown in FIGS.
It should be noted that the outer shell internal gears 27 and 27 'of FIG. 2 do not have a cross section. As shown in FIG. 2, the planetary gear device 23 and the planetary gear device 23 'are connected by a rotation shaft 24 so that the output shaft of the planetary gear device 23 serves as the input shaft of the planetary gear device 23'. The planetary gear units 23, 23 'are shown in FIG.
, The sun gear 25 at the center and the sun gear 25
It has four planetary gears 26 that mesh with each other so as to surround the outer side of, and an outer shell internal gear 27 that meshes with all of the planetary gears 26.

The planetary gears 26 are rotatably held by planetary disks 28 and 29, respectively, and the planetary shafts 28 are inserted into the planetary disks 28 and 29, respectively.
Both ends of the planetary shaft 30 are fitted and fixed to carrier plates 31 and 32. The hole 33 in the center of the carrier board 31 is
A carrier plate 3 in which an input shaft (rotary shaft) 35 connected to a rotary shaft of a motor 34 is screwed and connected to be fitted and fixed to the sun gear 25.
The sun shaft 36 at the center of the lower surface of
It is connected and fixed to a rotary shaft 24 serving as an input shaft of 3 '.
Although the sun shaft 36 is integrated with the carrier board 31, it may of course be integrally fixed as a separate body.

A rotation preventing convex portion 38 is formed so as to face the outer peripheral surface of the outer shell internal gear 27 in a direction perpendicular to the circumferential direction. As shown in FIG. 2, the cover 22a is fitted to the carrier board 31 of the planetary gear device 23 so that the carrier board 31 can rotate, and the input shaft 35 is rotated by the through hole in the center of the cover 22a. Supports freely.

A housing main body 39a of a ventilation fan in which a small-diameter cylindrical body fitted so that the rotary shaft 24 can freely rotate and a large-diameter cylindrical body fitted to the planetary gear unit 23 are integrally connected. Is fitted and attached to the convex portion 38 of the outer shell internal gear 27 through a fitting hole 47 formed in the inner peripheral surface of the large-diameter cylindrical body. The housing body 39a is connected and fixed to the cover 22a. Since it is configured as described above, even if the input shaft (carrier shaft) 35 is rotated, the outer shell internal gear 27
Since the sun shaft 36 rotates without rotating, the planetary gear device 23 functions as a speed increaser.

On the outer peripheral surface of the small diameter cylindrical body of the housing body 39a, two bearings 40, 40 'are provided with a collar 41.
It is mounted opposite to each other. A gear fixing member 42 having a through hole in the center is interposed between the rear portion of the housing body 39a and the carrier disc 32 'of the other planetary gear device 23'. The gear fixing member 42 rotatably fits and supports the rotating shaft 24 through a central through hole.

The gear fixing member 42 has a small-diameter cylindrical body 51 screwed onto the inner peripheral surface of the small-diameter cylindrical body of the housing body 39a on the outer peripheral surface, and the carrier disc 3 of the planetary gear unit 23 '.
And a large-diameter cylindrical body 52 that is abutted and connected to 2 '. The gear fixing member 42 is connected and fixed to the carrier board 32 'by bolts.

A housing main body 39b of a ventilation fan made of a cylindrical body is rotatably fitted to the outer peripheral surfaces of the bearings 40 and 40 'and the planetary gear unit 23'. The housing body 39b has a fitting hole 47 'formed in the inner peripheral surface thereof.
Is fitted and attached to the convex portion 38 'of the outer shell internal gear 27'. As the rotary shaft 24 connected to the sun shaft 36 rotates, the outer shell internal gear 27 'of the planetary gear device 23' rotates together with the housing body 39b in the opposite direction to the rotary shaft 24.

A cover 22b having a rotary shaft 44 at its center is loosely fitted in the carrier board 31 'of the planetary gear unit 23', and the cover 22b has bolts (not shown) through holes 54.
And is fixed to the housing body 39b. Therefore, the rotary shaft 44 rotates in the opposite direction to the rotary shaft 24 together with the cover 22b and the housing body 39b.

When the rotary blade 45a is fixed to the input shaft 35, the rotary blade 45b fixed to the rotary shaft 44 rotates in the opposite direction at the same speed as the rotary blade 45a. Rotating blade 45
b may be fixed to the outer periphery of the housing body 39b,
In this case, the rotary blade 45a may be fixed to the rotary shaft 35 by fixing a cylindrical body having the same diameter as the housing main body 39b. In this case, the cylindrical body may be rotatably fitted in the convex portion 46 of the cover 22a.

The planetary gear units 23 and 2 used in the present invention
3'is a sun gear 25, a planetary gear 26, an outer shell internal gear 2
7 and carrier boards 31, 32,
It can be used without any problems. Planetary gear units 23 and 2
It is particularly preferable to use those having the same reduction ratio as 3 '. This is because by using the planetary gear device having the same reduction ratio and using one as a speed increasing device and the other as a speed reducing device, the rotary blades can be rotated at the same speed in opposite directions.

The rotating blades 45a and 45b are rotated at the same speed in the opposite directions by the outer shell internal gear 27 of the planetary gear unit 23 connected to the carrier shaft and the carrier disc 32 'of the other planetary gear unit 23'. Is fixed, the input shaft 35 of the planetary gear unit 23, the carrier boards 31, 32 and the planetary gear unit 23 '.
Anything that rotates the outer shell internal gear 27 'of
Any configuration can be used provided that it can be done in this way. The carrier disks 32 'and 31' and 32 and 31 of the same planetary gear device are so arranged that if one is fixed, the other is fixed, and if one is rotated, the other is also rotated.

In the above embodiment, the rotary shafts 35 and 44 are
Although one rotary blade is attached to each of the above, a plurality of rotary blades may be installed. This is because the swirling flow in which the air is sucked by the plurality of rotary blades on one side is rectified by the plurality of rotary blades on the other side and converted into a linear flow. In the above embodiment, the sun shaft of one planetary gear device 23 and the sun shaft of the other planetary gear device 23 'are connected by the rotating shaft 24. However, the rotating shaft 24 and one planetary gear device are connected. Of course, it does not matter if it is integrated with the sun axis.

Further, in the above embodiment, an example in which two planetary gear units are connected is shown, but similarly, the planetary gear units 23, 23 'are similarly connected using the rotary shaft 44 of FIG. 2 as the input shaft 35. By doing so, it is possible to provide a device in which three opposing rotary vanes rotate in reverse at the same speed. In this way, by sequentially connecting the planetary gear devices, it is possible to provide a device in which a large number of rotary blades rotate in opposite directions. Rotating shaft 24
And the sun shafts of both planetary gear units may be integrated, but if they are integrated, assembly becomes difficult.

Since it is preferable that the number of rotary blades that rotate in mutually opposite directions is an even number, when connecting the planetary gear device, it is preferable that the number is even in total. This is because it is necessary to repeat the swirling flow and rectification, and rectify the last. In the above embodiment, the planetary gear device having the same deceleration rate is used,
Since one is the speed increasing gear and the other is the speed reducing gear, the rotation from the input shaft is accelerated by one planetary gear device,
Since the speed is increased by the other planetary gear unit by the increased speed, rotation at the same speed as rotation from the input shaft can be obtained.

Although the motor is connected to the input shaft 35 in FIG. 2, the rotary blade is similarly connected to the rotary shaft 44 when the motor 34 is connected to the rotary shaft 44 as shown in FIG. 45a, 45b
Rotates in reverse. That is, when the rotary shaft 44 is rotated by the motor 34, the cover 22b, the housing body 39b and the outer shell internal gear 27 'rotate together in the same direction, and the sun of the outer shell internal gear 27' is rotated. The shaft (not shown) rotates in the opposite direction together with the sun shaft 36 of the planetary gear unit 23, and the shaft 35 rotates in the opposite direction to the rotation shaft 44.

[0035]

According to the present invention, the opposing rotary vanes are
Since the ventilation fan that rotates in the reverse direction is used, the swirling flow by one rotating blade is rectified by the other rotating blade and linear energy, that is, forward force is applied to the air, so that the desired air volume can be reliably obtained. A suction type ventilation fan device can be used. Further, if a single motor is used, the apparatus can be made compact and a large motor can be prevented from obstructing the air flow, so that a smooth air flow can be achieved.

Further, according to the present invention, since the ventilation fan 10 is arranged at the outdoor end, the motor 34 of the ventilation fan 10 is arranged.
Is the ventilation grill 12 that is the indoor end of the air flow passage 15.
Since the ventilation fan is installed in the room, the motor is arranged at a position farther from the room than in the prior art. Therefore, the motor and wind noise that enter the room can be reduced as compared with the conventional case.

Further, since the ventilation fan 10 is arranged at the indoor side end portion of the air flow passage 15, the ventilation fan 10 becomes a suction type, and a desired air volume can be obtained as the suction type. The amount of air based on the output of the motor is surely discharged to the outside of the room. for that reason,
Unlike the push-in type conventional ventilation fan device, the rate of conversion from the original air flow energy to sound energy that vibrates the duct 11 and the like that forms the air flow passage 15 can be reduced, and therefore, Also in this respect, it is possible to surely obtain the desired air volume, improve the air blowing efficiency, and prevent the generation of noise.

[0038]

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view of a ventilation fan used in the present invention.

FIG. 3 is an exploded perspective view of a planetary gear device used in the present invention.

FIG. 4 is a front view of a rotary blade used in the present invention.

[Explanation of symbols]

 10 Ventilation Fan Main Body (Ventilation Fan) 10 'Inverted Ventilation Fan Device 11 Duct 15 Air Flow Path 23, 23' Planetary Gear Device 34 Motor 44 Rotation Shafts 45a, 45B Rotating Blades

Claims (9)

[Claims] 1. A ventilation fan device having an air flow passage formed by including a duct that guides indoor air to the outside, and a ventilation fan arranged in the air flow passage, wherein the ventilation fan distributes the air. It consists of a reversing type ventilation fan that reversely rotates the opposing rotary blades arranged in the direction orthogonal to the direction, which is arranged at the outdoor side end of the air flow passage,
A suction type ventilation fan device, characterized in that it sucks indoor air and discharges it outside the room. 2. The rotary vanes of the reversing type ventilation fan are arranged such that the space between adjacent blades in the direction of rotation is reduced or the space between adjacent parts is provided in the front-rear direction although there is no space in the direction of rotation. 2. The ventilation fan device according to claim 1, wherein an area of the blade is increased, and an outer circumference of the rotary blade is brought close to the inner circumferential surface of the air flow passage directly or through a casing. 3. The ventilation fan device according to claim 1, wherein the reversing type ventilation fan is formed so as to be able to rotate in reverse by a single motor. 4. The ventilation fan device according to claim 1, wherein the reversing type ventilation fan causes the opposing rotary blades to rotate in reverse at the same speed. 5. The ventilation fan device according to claim 1, wherein the reversal type ventilation fan is a reversing type ventilation fan in which an even number of opposing rotary blades rotate in opposite directions. 6. The reversing type ventilation fan connects the sun shafts of planetary gear devices arranged coaxially to each other so that one of the planetary gear devices has a carrier disk as a free space and the other planetary gear device has a free space. The carrier disc is fixed, the outer shell internal gear of the planetary gear device of the carrier disc is fixed, and the outer shell internal gear of the other planetary gear device is set as a free, and the one of the planetary gear devices is One of the rotary vanes is fixed to a member connected to a carrier board, and the other rotary vane is fixed to the outer shell internal gear or the member connected to the outer shell internal gear. The ventilation fan device according to items 1 to 5. 7. The ventilation fan device according to claim 6, wherein the opposed planetary gear devices have the same speed reduction ratio, and the opposed rotary vanes are reversely rotated at the same rotational speed. 8. The ventilation fan device according to claim 6, wherein the planetary gear device comprises a sun gear, a planetary gear, an outer shell internal gear, and a carrier disc. 9. The ventilation fan device according to claim 8, wherein a protrusion for preventing rotation is formed on the outer circumference of the outer shell internal gear.