JP2997171B2 - Fan for air supply type pipe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fan for an air supply pipe used by being inserted into a ventilation pipe embedded in a room wall or a ceiling.

[0002]

2. Description of the Related Art In recent years, pipe fans have been used for ventilation of toilets, bathrooms and living rooms because of their easy installation. Is required.

Conventionally, this kind of air supply type pipe fan is
As shown in FIG. 6 , the electric motor 101 and the electric motor 1 are internally provided.
01 having a blade 102 driven by the
Has an attachment spring 106 for pressing the inner peripheral surface of the pipe 105 embedded in the chamber wall 104 to fix the main body. A flange 108 extending from the outer shape of the pipe 105 to the outside of the pipe 105 along the chamber wall 104 or the ceiling was formed on the outer periphery of the indoor side opening 107 of the cylindrical portion 103. Further, a louver 109 that covers the indoor opening 107 from the indoor side is fitted on the outer periphery of the flange portion 108.

The electric motor 101 is screwed and fixed to an electric motor fixing leg 110 integrally formed on the inner peripheral surface of the cylindrical portion 103, and passes through a hole 111 provided on the side of the cylindrical portion 103 on the side of the indoor opening 107. Of the power supply terminal 11 provided on the flange 108
3 and the blade 102 is attached to the outside opening 114 side of the cylindrical portion 103 of the electric motor 101.

In the above configuration, when power is supplied to the power terminal 113 and the pipe fan is operated, the motor 1
01, the blade 102 starts rotating, and the air in the outdoor 115 is sucked by the blade 102 and the cylindrical portion 103 and the louver 1
09 and is supplied to the room 116.

[0006]

In such a conventional configuration of the fan for the air supply type pipe, the electric motor 101 is moved from the outdoor side opening 115 of the cylindrical portion 103 to the cylindrical portion 10 when the product is assembled.
3 and screwed to the motor fixing legs 110, and then the blades 102 were inserted and fixed. However, both operations are performed inside the cylindrical portion 103, and it is difficult to tighten the screws.
There is a problem that it is difficult to position and insert the blade 102, and that the assembling workability is poor.

When the cylindrical portion 103, the flange portion 108, and the motor fixing leg 110 are integrally formed to reduce the number of parts, the shape of the end of the cylindrical portion 103 at the opening 114 on the outdoor side has a draft angle of the mold. Due to the relationship, it can spread out in the direction of 115 outdoors or can only be formed straight at best. As a result, in terms of characteristics, it is not possible to obtain a product with high static pressure. In that case, there is a problem that the noise value becomes high.

The connection between the electric motor 101 and the power supply terminal portion 113 is made by a lead wire 112 passing through a hole 111 provided on the side surface of the cylindrical portion 103 on the side of the indoor opening 107.
The work of passing the lead wire 112 is difficult, and if the hole diameter of the hole 111 is increased to improve the workability, the airtightness of the cylindrical portion 103 is reduced, and the supplied air passes through the outer peripheral portion of the cylindrical portion 103 to the outdoor 115. There was a problem of leakage.

It is a first object of the present invention to solve the above-mentioned problems and to provide a fan for an air supply type pipe in which an electric motor and a blade can be easily attached to a main body cylindrical portion.

A second object is to improve performance such that a high static pressure can be obtained or a noise value can be suppressed low even with a large air flow.

A third object of the present invention is to simplify the operation of passing a lead wire connecting the electric motor and the power supply terminal portion, and to improve the airtightness of the cylindrical portion.

[0012]

SUMMARY OF THE INVENTION In order to achieve the first and second objects, a fan for an air supply type pipe according to the present invention has the following objects.
The first means includes a first cylindrical portion having a cylindrical shape, an electric motor fixed inside, and a flange portion extending outward on the outer periphery of the indoor side opening; and a chamber wall on the outer peripheral portion of the first cylindrical portion. Alternatively, an attachment spring disposed to press against an inner peripheral surface of a pipe provided on a ceiling, and a second cylinder coupled to the first cylinder portion in a cylindrical shape covering a blade fixed to the electric motor. And a louver attached to the flange to cover an indoor opening of the first cylindrical portion from the indoor side, wherein the second cylindrical portion is detachable from the first cylindrical portion after fixing the electric motor. Combined with and static
To increase the pressure or increase the supply air volume,
Changes with changing the blade, the second cylindrical portion to those of the inlet shape adapted the outdoor side opening in the blade
Configuration .

Further, in order to achieve the second object, a second
Means is that the second cylindrical portion is fitted and connected to the inside of the first cylindrical portion.
At the same time, the indoor side end is located near the non-suction side end of the blade.

Further, in order to achieve the second object, the third
Means is configured such that the inner diameter of the second cylindrical portion is formed smaller than the inner diameter of the first cylindrical portion.

In order to achieve the third object, the fourth object
In the means, a slit-shaped opening groove through which a lead wire for connecting an electric motor and a power supply terminal is inserted is provided in an end portion of the outdoor opening of the first cylindrical portion in the indoor side direction, and an indoor end of the second cylindrical portion is provided. The opening groove after the lead wire is inserted is closed by a closing piece provided in the portion.

[0016]

According to the first aspect of the present invention, the length of the first cylindrical portion is reduced, the screwing of the motor is facilitated, and the blades are mounted outside the first cylindrical portion. In addition to this , the outdoor opening, which is the blade suction side end of the second cylindrical portion, can be formed into a suction port shape adapted to the blade, and the performance can be improved.

Further, by the configuration of the second means, the shape of the air passage can be reduced by reducing the inner diameter around the blade near the suction port and increasing the inner diameter after passing around the blade, so that the performance can be improved. Can be done.

Further, according to the configuration of the third means, the second cylinder is provided.
By reducing the diameter of the blade located on the inner peripheral side of the section, a product with a high static pressure can be obtained.

Further, according to the configuration of the fourth means, the work of attaching the lead wire connecting the electric motor and the power supply terminal portion becomes easy, and the airtightness of the first cylindrical portion can be improved.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.

As shown in the figure, a plurality of motor fixed legs 3 for mounting a motor 2 for driving a turbo-shaped blade 1 are provided on the inner peripheral surface, and the indoor side opening 4 is long enough to accommodate the motor 2.
Is provided with a first cylindrical portion 8 having a flange portion 7 extending to the outside of the outer shape of the pipe 6 embedded in the chamber wall 5. One end of a mounting spring 9 for holding the first cylindrical portion 8 by pressing against the inner peripheral surface of the pipe 6 embedded in the boss portion is mounted on a boss portion 10 provided on the flange portion 7.

A power supply terminal 11 is provided on the flange portion 7 of the first cylindrical portion 8, and a lead wire 13 for connecting the electric motor 2 and the power supply terminal portion 11 is provided on the outdoor opening 12 of the first cylindrical portion 8. A slit-shaped opening groove 14 is formed toward the room 15 side, and a hooking rib 16 is provided on the inner peripheral surface of the first cylindrical portion 8 near the outdoor side opening 12 side.

An orifice portion 19 corresponding to the suction portion 18 of the blade 1 is provided at the end on the outdoor 17 side in a shape to cover the blade 1 and fits inside the outdoor opening 12 of the first cylindrical portion 8. A hook-shaped claw 21 that engages with a hooking rib 16 provided on the first cylindrical portion 8 by being rotated at the indoor side end portion 20 and a hook-shaped claw 21 provided on the first cylindrical portion 8. A second piece 23 is formed by projecting a closing piece 22 having a shape for closing the opening of the opening groove 14 existing after the lead wire 13 is inserted into the slit-shaped opening groove 14.

A louver 24 is mounted on the outer periphery of the flange 7 to cover the indoor opening 4 from the indoor 15 side.

In the above configuration, the motor 2 is connected to the lead 1
3, the lead wire 13 is first inserted into the opening groove 14 from the outdoor opening 12 side, and then the first cylindrical portion 8 is attached to the first cylindrical portion 8. Screwed and fixed to the motor fixed legs 3 integrally formed on the inner peripheral surface of
The power supply terminal 11 is attached to the flange 7 from the outdoor opening 12 side, and then the blade 1 is fixed to the electric motor 2.

Then, the outside opening 12 of the first cylindrical portion 8 is
After fitting the inside end 20 of the second tubular portion 23 inside , the hooking rib 16 provided on the first tubular portion 8 is rotated.
Engages with the hooking claw 21 provided on the second cylindrical portion 23,
The second tubular portion 23 is connected to the first tubular portion 8, and the lead wire 13 is closed by the closing piece 22 provided in the second tubular portion 23.
After the is inserted, the opening existing in the opening groove 14 is closed, and the louver 24 is attached to the flange portion 7 and assembled.

The pipe fan is mounted on the chamber wall 5 by being inserted into the pipe 6 embedded in the chamber wall 5 against the elasticity of the mounting spring 9.

When power is supplied to the power supply terminal 11 and the pipe fan is operated, the turbo-type blade 1 is driven by the electric motor 2, and the air outside 17 is sucked by the blade 1 and the orifice 19 The air is supplied to the room 15 through the second cylindrical portion 23, the first cylindrical portion 8, and the louver 24.

As described above, according to the air supply pipe fan of the first embodiment of the present invention, the main body having a shape covering the electric motor 2 and the blades 1 is formed by the first cylindrical portion 8 and the second cylindrical portion 23. The second cylindrical portion 23 is formed and fixed to the first cylindrical portion 8 after the electric motor 2 is fixed.
Are connected to each other, so that the length of the first cylindrical portion 8 can be reduced, so that the installation of the electric motor 2 in the first cylindrical portion 8 and the fastening of the screw to the electric motor fixing leg 3 can be performed. This makes it easy to attach the blade 1 outside the first tubular portion 8, and also attach the second tubular portion 23 to the hook provided on the inner peripheral surface of the first tubular portion 8. Second for the rib 16
It can be mounted simply by engaging the hooking claws 21 provided on the cylindrical portion 23, so that the assembling workability is improved.

Further, since the orifice portion 19 adapted to the suction portion 18 of the turbo-shaped blade 1 is formed at the end of the second cylindrical portion 23 on the outdoor 17 side, the backflow of air when a static pressure is applied. Can be prevented and air can be supplied reliably, and the performance can be improved.

Further, the indoor side end 20 of the second cylindrical portion 23 is located near the anti-suction side end 25 of the blade 1,
Because of the cylindrical portion 23 of the inner diameter φA is smaller diameter than the inner diameter φB of the first tubular portion 8, since the smaller the gap between the blade 1 and the second cylindrical portion 23, took hydrostatic In this case, the backflow of air can be prevented, and a high apparatus static pressure can be obtained. After passing around the blade 1, the inner diameter φB of the first cylindrical portion 8 is larger than the inner diameter φA of the second cylindrical portion 23. The air that has greatly passed around the blade 1 flows through the wider ventilation path with less resistance, so that it is possible to increase the air volume and reduce the noise generated.

The lead wire 13 connecting the power supply terminal portion 11 and the motor 2 is connected to the outdoor opening 12 of the first cylindrical portion 8 when the motor 2 is assembled from the outdoor opening 12 of the first cylindrical portion 8. It is inserted into the slit-shaped opening groove 14 formed toward the room 15 side, and the opening groove 14 after the lead wire 13 is inserted is closed by the closing piece 22 provided in the second cylindrical portion 23. The entire assembly work can be performed from the outdoor opening 12 side, and the lead wire 13 can be attached simply by inserting the lead wire 13 into the opening groove 14 in a state where the lead wire 13 is attached to the power supply terminal portion 11 in advance. In addition, the opening groove 14 is closed by the closing piece 22 and airtightness can be ensured.

The pipe 6 to be embedded in the chamber wall 5 is usually arranged by a contractor. If the inner diameter is too small, the pressing force of the mounting spring 9 becomes too large. However, if one end of the mounting spring 9 is fixed to the flange portion 7, both ends of the mounting spring 9 are located between the cylindrical portion and the pipe. , The pressing force on the inner peripheral surface of the pipe 6 is the same, and almost half of the reaction force is applied to the outer peripheral surface of the first cylindrical portion 8, and the remaining approximately 1 The reaction force of / 2 is applied to the flange portion 7, and the deformation of the first cylindrical portion 8 is reduced.

Although the first embodiment has been described with reference to the case of mounting on a room wall, it is needless to say that the same effect can be obtained when mounting on a ceiling.

Hereinafter, a second embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. The same components as those of the first embodiment are denoted by the same reference numerals, and the detailed description is omitted.

As shown in the drawing, the second embodiment differs from the first embodiment in that the blade suction side end of the second cylindrical portion 30 is
It has a bell mouth shape 31 extending in the outer peripheral direction of the cylindrical portion, and the blades 32 have a propeller shape.

In the above configuration, by making the blade 32 a propeller type, the air supply amount is greatly increased though the device static pressure is reduced, and the blade suction side end of the second cylindrical portion 30 is connected to the outer periphery of the cylindrical portion. By forming the bell mouth shape 31 expanding in the direction, the turbulence of the airflow at the suction portion is reduced, so that the noise value can be kept low even at a large air volume.

As described above, according to the second embodiment of the present invention,
By simply changing the blade 32 and the second cylindrical portion 30 without changing the other main body, a product having a large air volume and a low noise value can be obtained.

Hereinafter, a third embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. Note that the same components as those of the second embodiment are denoted by the same reference numerals, and detailed description is omitted.

As shown in the drawing, the third embodiment is different from the first embodiment in that the inner diameter φC of the second cylinder 40 is reduced by the first cylinder 8.
Is smaller than the inner diameter φA of the second cylindrical portion 23 of the first embodiment, and the outer diameter φD of the blade 41 is also reduced in proportion thereto.

In the above configuration, the inner diameter φC of the second cylindrical portion 40 is set to be smaller, and the outer diameter φD of the blade 41 is reduced while the gap between the inner peripheral surface of the second cylindrical portion 40 and the blade 41 remains unchanged. By doing so, the load on the blades 41 can be reduced and the number of rotations can be set higher, so that the supply airflow is reduced, but the device static pressure can be greatly increased.

As described above, according to the third embodiment of the present invention,
By simply changing the blade 41 and the second cylindrical portion 40 while keeping the other main body parts as it is, it is possible to obtain a product having a low air volume and a high device static pressure.

[0043]

As is apparent from the above embodiment, according to the present invention, the first motor in which the electric motor is fixed inside in a cylindrical shape and the flange portion extends outward on the outer periphery of the indoor opening. a cylindrical portion, is divided into the second tubular portion coupled to the first tubular portion in cylindrical shape covering the anchored blade to the motor constitutes a body portion, said first tubular portion after the electric motor fixed said second cylindrical portion attached to, and take high static pressure, or increasing the supply air volume
So that the second blade is changed,
The cylindrical part has a suction port shape with its outdoor opening adapted to these blades.
Since the configuration is changed to the shape of a cylinder, the length of the first cylindrical portion is shortened, and the motor and the blade are easily attached.
Change of the blade, and the suction port of the second cylindrical portion adapted to the blade
Just change the shape to orifice shape, bellmouth shape
Thus, it is possible to provide a fan for an air supply type pipe capable of improving the performance .

Further, since the second cylindrical portion is fitted and connected to the inside of the first cylindrical portion, and the indoor side end is located near the end opposite to the suction side of the blade , the static pressure is reduced. It is possible to improve the performance such that the noise value can be kept low or the noise value can be kept low even with a large air flow. Also,
The inner diameter of the second cylindrical portion is formed smaller than the inner diameter of the first cylindrical portion.
Therefore, the blade diameter is reduced to reduce the load,
By increasing the value, a product with a high static pressure can be obtained.

Further, a slit-shaped opening groove for passing a lead wire connecting the electric motor and the power supply terminal portion is provided in an end portion of the outdoor opening portion of the first cylinder portion toward the interior side of the room . By closing the opening groove after the lead wire is inserted with the closing piece provided at the indoor side end, the operation of passing the lead wire connecting the electric motor and the power supply terminal portion is simplified, and the first cylinder The airtightness of the part can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an installed state of a fan for an air supply type pipe according to a first embodiment of the present invention.

FIG. 2 is a side view of the first embodiment showing a state before the first and second cylinders are coupled to each other;

FIG. 3 is an enlarged sectional view of a mounting spring portion of the first embodiment.

FIG. 4 is a sectional view showing an installation state of a fan for an air supply type pipe according to the second embodiment.

FIG. 5 is a sectional view showing an installation state of the air supply pipe fan according to the third embodiment;

FIG. 6 is a sectional view showing an installation state of a conventional air supply type pipe fan.

[Description of Signs] 1 blade 2 motor 4 indoor opening 5 indoor wall 6 pipe 7 flange 7A flange 8 first cylinder 9 mounting spring 11 power supply terminal 12 outdoor opening 13 lead wire 14 opening groove 15 indoor 20 Indoor end 22 Closing piece 23 Second cylindrical part 24 Louver 40 Second cylindrical part 41 Blade

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F24F 7/06 F24F 7/10

Claims (4)

(57) [Claims] 1. A first tubular portion having a cylindrical shape and an electric motor fixed therein and having an outwardly extending flange portion on the outer periphery of the indoor opening, and a chamber wall or an outer peripheral portion of the first tubular portion. A mounting spring disposed to press against an inner peripheral surface of a pipe provided on a ceiling, and a second tubular portion coupled to the first tubular portion in a tubular shape covering blades fixed to the electric motor. A louver attached to the flange portion to cover an indoor opening of the first cylindrical portion from the indoor side, and the second cylindrical portion is detachably attached to the first cylindrical portion after fixing the electric motor. Combined and
Increase the static pressure or increase the air supply volume.
With changing the serial vanes, said second tubular portion is variable in that suction mouth shape adapted the outdoor side opening in the blade
A fan for air supply pipes with a further configuration . 2. The air conditioner according to claim 1, wherein the second cylindrical portion is fitted and connected to the inside of the first cylindrical portion, and the indoor side end of the second cylindrical portion is located near the anti-suction side end of the blade. Fan for air supply type pipe. 3. The air supply pipe fan according to claim 1, wherein the inner diameter of the second cylindrical portion is smaller than the inner diameter of the first cylindrical portion. 4. A slit-shaped opening groove through which a lead wire connecting an electric motor and a power supply terminal is inserted is provided at an end of the outdoor opening of the first cylindrical portion in a direction toward the indoor side. 4. The fan for an air supply pipe according to claim 1, wherein the opening groove after the lead wire is inserted is closed by a closing piece provided at an end on the indoor side.