JPH07190439A - Fan for pipe - Google Patents

Abstract

PURPOSE:To provide a fan for a pipe which corresponds to automation of assembly, enables diverse application of main components without increasing structural components and thereby makes it possible to facilitate development of types of machines being different in performance or external appearance. CONSTITUTION:A frame which is a usual main component is divided into a base part 12 including an orifice 11 and a tubular part 6 provided with a motor 1 and vanes 2. Shapes of these fixed parts are made prescribed ones, while other shapes and specifications are varied, and various base parts 12 and tubular parts 6 are provided selectably and removably.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fan for pipes, which is mainly attached to a ceiling or a room wall of a home or office.

[0002]

2. Description of the Related Art In recent years, there has been an increasing demand for pipe fans of this type which can be used for automation of assembly and sharing of parts for each model.

Conventionally, regarding this type of pipe fan,
This will be described with reference to FIGS. 19 and 20. As shown in the figure, the blades 10 driven by the electric motor 101 inside
2 has a pipe 1 embedded in the wall 103 on the outer periphery
A cylindrical portion 106 provided with a spring 105 that is crimped to the inner surface of 04.
On the outer periphery of the end of the tubular portion 106 on the side of the blade 102, a flange portion 107 extending along the wall portion 103 to the outside of the outer shape of the pipe 104 is formed, and in the indoor opening 108, an orifice 109 that forms a suction port. Is provided, and the cylindrical portion 1
06 and the flange portion 107 were integrally molded as the frame 110.

A louver 112 for covering the indoor side opening 108 from the room 111 was attached to the outer peripheral portion of the flange 107.

In the above structure, when the tubular portion 106 of the pipe fan is inserted into the pipe 104 and the spring 105 provided in the tubular portion 106 is pressure-bonded to the inner surface of the pipe to attach the pipe fan and energize, the electric motor 101 is driven. The blade 102 was rotated, and the air in the room 111 was sucked by the blade 102, passed through the louver 112 and the orifice 109, and was exhausted to the outside 113.

[0006]

In such a conventional pipe fan configuration, the frame 110 becomes large and complicated in shape, and at the time of assembly, the wiring and the attachment of the electric motor 101 are made from both the inside and outside of the frame 110. When you want to reduce the construction cost by automatic assembly, you want to make a structure that can be molded many times at once, or when you want to develop models with different performance by changing only the blades 102 and the electric motor 101. Or the same electric motor 101
When you want to attach a round or square louver 112 by changing the shape only of the flange part 107 where the louver 112 is attached, and the difference between the automatic type board and sensor that detects the indoor environment by various sensors and exhausts When you want to share the space to store in one frame 110, when you do not want to use expensive flame-retardant resin for the whole frame 110 to isolate the sensor with a high heat generation amount, you need to modify the mold or add another part. When you want to develop a model for air supply without creating it, or by separately assembling the capacitor connected to the motor lead wire, the quick connection terminal or the circuit board and the circuit case that is the storage part as the electrical component part, When you want to eliminate detailed work such as wiring on the top, or if the frame 110 has any shape and size, use one circuit case. And when you use that you want to suppress at a low cost,
Further, when a solenoid for driving an electric shutter is provided on the circuit board in order to prevent backflow of outside air, and when it is desired to eliminate fine work such as wiring on the frame 110,
There is a problem in that it is not possible to deal with the case where it is desired to facilitate the assembly work of the shutter installation work performed on the back surface of the louver 112.

The present invention solves the above problems, and a first object thereof is to provide a pipe fan that facilitates the development of models having different performances.

A second object of the present invention is to provide a pipe fan in which a louver can be easily formed in conformity with the flange shape of the base portion, the performance is the same, and model deployment having different appearances from the room is easy.

A third object of the present invention is to provide a pipe fan for facilitating the development of various automatic types of machines, which are different from the electrical equipment box.

A fourth object is to provide a pipe fan that facilitates not only exhaust gas but also model supply for air supply.

A fifth object is a pipe which eliminates fine work such as connection and lead wire processing in a narrow space and can be assembled at a low cost by diverting one circuit case regardless of the shape and size of the base portion. Is to provide a fan for.

A sixth object is to eliminate fine work such as wiring including a solenoid and processing of lead wires in a narrow place, so that the shutter can be attached to the shutter supporting portion in a large place without disturbing ribs or the like. (EN) It is an object to provide a pipe fan having an effect of preventing backflow into a room that can be operated.

[0013]

In order to achieve the first object, the pipe fan of the present invention has a first means in a pipe inserted into an opening provided in a room wall or a ceiling surface. It has a cylinder part that is mounted and has an electric motor with fixed blades inside, and an orifice that is formed in the center so as not to obstruct the flow of air, and has an outer periphery that extends along the chamber wall or ceiling surface. A base portion having a formed flange portion; and a louver fixed to the flange portion of the base portion to cover the indoor side opening of the tubular portion and the base portion from the indoor side, and the tubular portion and the base portion are divided. It has various blades and various cylinders with different specifications of the electric motor, and is configured to be freely attachable to and detachable from the base.

In order to achieve the second object, the second
Is mounted in a pipe inserted into an opening provided in a room wall or a ceiling surface, and is formed so as not to interfere with the air flow in the cylindrical portion provided with an electric motor having fixed blades inside and in the center portion. A base portion having an orifice and a flange portion extended to come into contact with the chamber wall or the ceiling surface on the outer periphery, and the cylindrical portion and the base portion fixed to the flange portion of the base portion. A louver that covers the indoor side opening from the indoor side, and a configuration in which the tubular portion and the base portion are divided and various base portions having different shapes such as a circle and a square are provided, and the tubular portion is selectable and removable. It was done.

In order to achieve the third object, the third
Is a sensor for automatically turning the pipe fan on and off in response to sensors such as human presence, humidity, smoke, dew condensation, and differential pressure, and a circuit board containing this sensor is the electrical component BO.
It is configured such that it can be attached to and detached from the inside of the X, and that it is detachably attached to the base portion.

In order to achieve the fourth object, the fourth
This means has a structure in which the tubular portion is reversed and is detachably attached to the base portion.

Further, in order to achieve the fifth object,
The means is configured to be attachable to and detachable from the electric motor lead wire, which is directly connected to the electric motor provided inside the tubular portion, the capacitor, the connecting terminal or the circuit board and the circuit case which is the housing portion thereof, as an electric component part, Further, the electric component portion is detachably attached to the base portion.

In order to achieve the sixth object, the sixth
In order to prevent the backflow of outside air into the room through the orifice opening formed in the base part, the shutter support part is integrally molded with the base part, and the shutter support part is fitted to drive the shutter that can be opened and closed. The solenoid is arranged inside the circuit case.

[0019]

With the construction of the above-mentioned first means, the present invention can be automated and simplified because the components are assembled from the same direction, and therefore it is possible to take a large number of mold components, and the specifications of the motor or the shape of the blades. Since various bases having different types are provided so that they can be freely attached to and detached from the base, it is possible to easily develop models with different performances.

The configuration of the second means allows the components to be assembled from the same direction so that the process is automated and simple, so that it is possible to handle a large number of mold components, and various shapes such as circles and squares can be used. A louver that matches the flange shape of the base part can be easily created and installed by configuring the base part so that it can be freely attached to and detached from the cylinder part. It will be possible to develop.

Further, by the configuration of the third means, the circuit board including various sensors is selectively and detachably housed in the electrical equipment box, and only this electrical equipment box is made of flame-retardant resin. Both cost and heat safety can be achieved, and by configuring the storage part in the base part so that this electric BOX can be detached, it is possible to develop various automatic type models with one base part and electric BOX. It will be possible.

Further, according to the structure of the fourth means, the mounting portion provided on the indoor side of the tubular portion for connection to the base portion is also provided on the outdoor side of the tubular portion, and the tubular portion is inverted to be mounted. You will be able to develop your favorite models.

Further, by the structure of the fifth means, a structure in which a capacitor, a connecting terminal or a circuit board which is selectively and detachably connected to the motor lead wire and a circuit case which is a housing portion thereof can be separately assembled as an electric component part. In addition, by making the fixed shape of this circuit case and the base part that houses the circuit case constant, detailed work such as wiring and lead wire processing in a narrow space can be eliminated, and the shape and size of the base part can be eliminated. This means that one circuit case can be used.

According to the structure of the sixth means, the solenoid for driving the shutter for preventing the backflow of the outside air into the room is connected to the motor lead wire in a freely and detachably connectable manner to the condenser, the connecting terminal or the circuit board. Since it can be assembled separately as an electrical component in the circuit case that is its storage part, detailed work such as wiring and lead wire processing in a narrow place can be eliminated, and the shutter support part is integrally molded on the base part. As a result, when the shutter is attached to the shutter support portion, it is possible to work in a wide area and without disturbing the ribs.

[0025]

【Example】

(Embodiment 1) Hereinafter, a first embodiment of the present invention will be described with reference to FIG.
-It demonstrates, referring FIG. As shown in the figure, an electric motor 1 having various specifications and a vane 2 having various shapes driven by the electric motor 1 are combined therein, and a pipe 4 provided on a wall portion 3 or the like is provided on the outer periphery. Various cylinder parts 6 having different performances provided with springs 5 that are crimped on the inner surface
The inner end 7 of the tubular portion 6 extends outside the outer shape of the pipe 4 in parallel with the wall portion 3 on the outer periphery of the blade-side end portion 8 of the tubular portion 6 and finally reaches the wall portion. 3 is formed with a flange portion 9 extending so as to come into contact with the interior opening 1
At 0, a base portion 12 having an orifice 11 forming a suction port is detachably fixed.

A louver 14 is attached to the outer periphery of the flange portion 9 of the base portion 12 so as to cover the indoor opening 10 from the indoor side 13 so as to be removable.

With the above structure, the tubular portion 6 of the pipe fan
Is inserted into the pipe 4, and the spring 5 provided in the tubular portion 6 is pressed against the inner surface of the pipe 4 to attach a fan for the pipe to energize the blades 2 to rotate the air on the indoor side 13 to the outdoor side 15.
The motor 1 and the blades 2 are stopped when they are exhausted and are stopped from being energized.

Further, apart from the basic function of exhaust, in the manufacturing and assembling process, it is possible to assemble the components from the same direction, so automation and simplification are possible, and it is possible to handle a large number of die parts. By providing various cylindrical portions 6 having different specifications of the electric motor 1 or different shapes of the blades 2 and being configured to be freely attachable / detachable to / from the base portion 12, it is possible to easily develop models having different performances.

As described above, according to the pipe fan of the first embodiment of the present invention, it is a low-cost, easy-to-assemble product, and an efficient product that facilitates model development with different performance without increasing the number of parts. Can be put on the market.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to FIGS. As shown in the drawing, a tubular portion 6a having a blade 2a driven by an electric motor 1a inside, and a spring 5 for crimping the inner surface of a pipe 4 provided on a wall portion 3 or the like on the outer periphery, and a tubular portion 6a. Part 6a
The inner end 7 of the cylindrical portion 6a extends outside the outer shape of the pipe 4 parallel to the wall 3 on the outer periphery of the blade-side end 8 of the tubular portion 6a, and finally extends so as to come into contact with the wall 3. In addition, various base portions 12a having different shapes, which are formed with flange portions 9a having different shapes such as circles and squares and an orifice 11 forming a suction port in the indoor opening 10, are detachably fixed. Has been done.

Further, the flange portion 9a is formed on the outer periphery of the flange portion 9a of various shapes of the base portion 12a so as to easily and surely cover the indoor side opening 10 from the indoor side 13 side.
A louver 14a adapted to the outer shape of a is detachably attached.

With the above structure, the tubular portion 6 of the pipe fan
a is inserted into the pipe 4, and the spring 5 provided in the tubular portion 6a
When the pipe fan is attached to the inner surface of the pipe 4 by pressure to attach the fan to the pipe 4, the blade 2a rotates and the air inside the room 13 is exhausted to the outside 15, and when the supply of the electric current is stopped, the electric motor 1a and the blade 2a stop.

Further, in addition to the basic function of exhaust, in the manufacturing and assembling process, it is possible to assemble the components from the same direction, which is automated and simple, so that it is possible to take a large number of die parts, and The louver 14a adapted to the shape of the flange portion 9a of the base portion 12a can be easily created by providing various base portions 12a having different shapes such as circles and squares so as to be freely and detachably attached to the tubular portion 6a. It can be installed together with the same performance and makes it easy to deploy models with different appearances from the room.

As described above, according to the pipe fan of the second embodiment of the present invention, it is possible to develop a model having a low cost, a good assembling property, the same performance, and a different appearance from the room without increasing the number of parts. You will be able to bring to market an efficient product that will make it easier.

(Embodiment 3) A third embodiment of the present invention will be described below with reference to FIGS. The third
The first to sixth embodiments are different from the first and second embodiments in the configuration of the main parts, and the same parts as the first and second embodiments are represented by the first embodiment. The same reference numeral is given to omit detailed description. As shown in the figure, various sensors 16 such as human presence, humidity, smoke, dew condensation, and differential pressure, and a circuit board 17 for controlling the sensor 16 are provided on the indoor 13 side in order to grasp the state or situation of the indoor 13. Electrical equipment B provided with a notch 18 for signal detection of the sensor 16
This electrical equipment box is detachably inserted into the OX19.
An accommodating portion 20 is formed and fixed to the base portion 12 so that 19 can be detachably fixed from the outdoor side 15.

The louver 1 is provided in the same manner as the signal detecting notch portion 18 of the sensor 16 provided in the electrical equipment box 19.
A cutout portion 21 is provided at 4.

With the above structure, the circuit board 17 including the various sensors 16 is housed in the electrical equipment BOX 19 in a freely selectable and removable manner, and by forming only the electrical equipment BOX 19 with a flame-retardant resin, it is possible to reduce the cost and heat. It is possible to achieve both safety with respect to the above, and by configuring the storage portion 20 in the base portion 12 so that the electric equipment box 19 can be detachably attached, it is possible to easily develop various automatic type models with one base portion 12 and the electric equipment box 19. be able to.

As described above, according to the pipe fan of the third embodiment of the present invention, the cost is low, the assemblability is good, and various automatic types can be easily developed without increasing the number of parts. It will be possible to bring to market an efficient product that can be done.

(Embodiment 4) A fourth embodiment of the present invention will be described below with reference to FIGS. As shown in the drawing, an attachment portion 23 having the same shape as that of the attachment portion 22 provided at the indoor end 7 of the cylinder portion 6 so as to be detachably fixed to the base portion 12 is provided on the outside of the cylinder portion 6. The end portion 24 is also formed so that the tubular portion 6 can be inverted and detachably fixed to the base portion 12.

With the above structure, the inside 13 side and the outside 15 side of the tubular portion 6 can be reversed and can be detachably fixed to the base portion 12, facilitating the development of models for air supply as well as exhaust air. it can.

As described above, according to the pipe fan of the fourth embodiment of the present invention, the cost is low, the assemblability is good, and various types of air supply models can be easily developed without increasing the number of parts. It will be possible to bring an efficient product to market.

(Fifth Embodiment) A fifth embodiment of the present invention will be described below with reference to FIGS. 13 to 15. As shown in the figure, a motor lead wire 2 directly connected to the motor 1
The terminal 5 has a pair of male and female housings 2
6 is fixed, and the housing 26 is similarly fixed on the circuit board 29 on which the capacitor 27 or the capacitor 27 and the connecting terminal 28 are arranged and fixed so as to be selectively and detachably inserted and connected to the housing 26. .

In order to detachably fix and insulate the circuit board 29, a notch 30 for escape of the motor lead wire 25 is provided on the side surface, and a power supply wire 31 is connected to and disconnected from the connecting terminal 28. It is housed in a circuit case 33 having a hole 32, and is configured as an electrical component portion 34.

The circuit case 33 is selectively and detachably fixed to a fixing portion 35 which is provided on the outdoor side 15 side of the base portion 12 which is a storage portion thereof and keeps its mounting portion shape constant.

With the above structure, the condenser 27 which is selectively and detachably connected to the motor lead wire 25,
The connecting terminal 28 or the circuit board 29 and the circuit case 33, which is the storage portion thereof, can be separately assembled as the electrical component portion 34, and the shape of the fixing portion 35 of the circuit case 33 and the base portion 12 for storing the circuit case 33 is made constant. Thus, it is possible to eliminate fine work such as wiring and lead wire processing in a narrow place, and one circuit case 33 can be diverted even if the base portion 12 has any shape and size.

As described above, according to the pipe fan of the fifth embodiment of the present invention, the assembling property is good, and the cost can be easily reduced by diverting one circuit case 33 without increasing the number of parts. You will be able to bring to market an efficient product that you can do.

(Sixth Embodiment) A sixth embodiment of the present invention will be described below with reference to FIGS. As shown in the figure, a shutter support portion 36 is integrally molded on the outdoor 15 side of the base portion 12, and the storage portion is fitted to the shutter support portion 36 and adjacent to the circuit board 29 in the circuit case 33. When the shutter 38 driven by the solenoid 37 is energized, the suction force obtained by the solenoid 37 is transmitted by the force transmitted through the shutter lever 39 to open. It is configured to be pulled by a solenoid spring 40 mounted between the base portion 12 and the base portion 12 to be closed to prevent backflow of outside air into the chamber 13.

With the above structure, when the pipe fan is attached and the power is turned on, the shutter 38 opens and at the same time the blade 2
Is rotated and the air on the side of the room 13 is exhausted to the room 15, and when the supply of electricity is stopped, the electric motor 1 and the blades 2 are stopped and the shutter 38 is closed to prevent backflow of the outside air.

Further, the solenoid 37 for driving the shutter 38 is connected to the electric motor lead wire 25 in a freely selectable and detachable manner, together with the condenser 27, the connection terminal 28 or the circuit board 29 and the circuit case 33 which is a housing portion thereof. The electrical parts 34 can be assembled separately so that detailed work such as wiring and lead wire processing in a narrow space can be eliminated, and the shutter support 36 can be integrally molded with the base 12 to support the shutter 38. It is possible to facilitate the development of a model having a backflow prevention effect, which enables a work to be performed in a wide place when being attached to the portion 36 and without disturbing the ribs or the like.

As described above, according to the pipe fan of the sixth embodiment of the present invention, the assembling property is good, and one circuit case 33 provided with the solenoid accommodating portion 37 can be used without increasing the number of parts. Therefore, it is possible to bring to the market an efficient product that can easily reduce the cost and can easily develop a model with a backflow prevention effect.

In the fifth embodiment, the motor lead wire terminal and the housing are used on the circuit board, but any other detachable housing may be used without any difference in the operation and effect.

In the fifth embodiment, the motor lead wire terminal and the circuit board are detachably mounted by using the housing, but they may be directly mounted, and there is no difference in their function and effect.

[0053]

As is apparent from the above embodiments, according to the present invention, since the components are assembled from the same direction, automation and simplification are possible, and it is possible to handle a large number of mold components and the specifications of the electric motor. Alternatively, it is possible to provide a pipe fan capable of facilitating model development with different performances by providing various tubular portions having different blade shapes and being configured to be freely attachable / detachable to / from the base portion.

Further, since the constituent parts are assembled from the same direction, it is automated and simple, so that it is possible to take a large number of mold parts and to equip the cylindrical part with various base parts of different shapes such as circles and squares. By making it selectable and detachable, it is possible to easily create and attach a louver that matches the flange shape of the base portion, and it is possible to easily deploy models with the same performance but different appearances from the inside of the room.

A circuit board including various sensors is selectively and detachably housed in the electrical equipment box, and only the electrical equipment box is made of a flame-retardant resin, so that low cost and heat safety can be achieved. Along with this, this electrical equipment B
By configuring the storage part in the base part so that the OX can be freely attached and detached, it is possible to easily develop various automatic type models with one base part and the electrical BOX.

Further, a mounting portion provided on the inside of the tubular portion chamber for connection to the base portion is also provided on the outside of the tubular portion chamber, and the tubular portion can be inverted and attached to facilitate the development of models for air supply. .

Further, the structure is such that a capacitor, a connecting terminal or a circuit board which is removably and detachably connected to the motor lead wire and a circuit case which is a housing portion thereof can be separately assembled as an electric component part, and the circuit case and the circuit By fixing the shape of the fixed part of the base part that houses the case, you can eliminate detailed work such as wiring and lead wire processing in a narrow place, and one circuit case regardless of the shape and size of the base part Can be diverted.

Further, in order to prevent backflow of outside air into the room, a solenoid for driving the shutter is selectively and detachably connected to the motor lead wire, and a capacitor, a connecting terminal or a circuit board and a circuit case which is a housing portion thereof. It has a structure that can be assembled separately as an electrical component inside, eliminating the need for detailed work such as wiring and lead wire processing in a narrow place.In addition, by integrally molding the shutter support part on the base part, the shutter support shutter You can work in a wide area when you attach it to the part without getting in the way of the ribs.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state in which a pipe fan according to a first embodiment of the present invention is attached to a wall portion.

FIG. 2 is a front view of the louver of the pipe fan of the first embodiment.

FIG. 3 is a rear view of the pipe fan of the first embodiment.

FIG. 4 is a sectional view showing a state in which the pipe fan of the second embodiment is attached to a wall portion.

FIG. 5 is a front view of a louver of the pipe fan of the second embodiment.

FIG. 6 is a rear view of the pipe fan of the second embodiment.

FIG. 7 is a cross-sectional view showing a state in which the pipe fan of the third embodiment is attached to a wall portion.

FIG. 8 is a front view of the louver of the pipe fan of the third embodiment.

FIG. 9 is a rear view of the pipe fan of the third embodiment.

FIG. 10 is an electrical box for the pipe fan of the third embodiment.
Front view of

FIG. 11 is a cross-sectional view showing a state in which the pipe fan of the fourth embodiment is attached to a wall portion.

FIG. 12 is a sectional view of a tubular portion of a pipe fan according to the fourth embodiment.

FIG. 13 is a cross-sectional view showing a state in which the pipe fan of the fifth embodiment is attached to a wall portion.

FIG. 14 is a rear view of the pipe fan of the fifth embodiment.

FIG. 15 (a) is a front view of an electric component portion of the pipe fan of the fifth embodiment. FIG. 15 (b) is a side view of an electric component portion of the pipe fan of the fifth embodiment.

FIG. 16 is a cross-sectional view showing a state in which the pipe fan of the sixth embodiment is attached to a wall portion.

FIG. 17 is a rear view of the pipe fan of the sixth embodiment.

FIG. 18 is a cross-sectional view of the base portion of the pipe fan of the sixth embodiment.

FIG. 19 is a cross-sectional view showing a state in which a conventional pipe fan is attached to a wall portion.

FIG. 20 is a front view of the pipe fan.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 electric motor 1a electric motor 2 blade 2a blade 3 wall part 4 pipe 6 cylinder part 6a cylinder part 9 flange part 9a flange part 10 indoor side opening 11 orifice 12 base part 12a base part 13 indoor 14 louver 14a louver 15 outdoor 16 sensor 17 circuit board 19 electrical equipment box 20 storage portion 22 attachment portion 23 attachment portion 24 tubular portion outer side end portion 25 electric motor lead wire 27 condenser 28 connection terminal 29 circuit board 33 circuit case 34 electrical component portion 36 shutter support portion 37 solenoid 38 shutter 39 shutter lever 40 for solenoid Spring

Claims (6)

[Claims] 1. A tubular part, which is installed in a pipe inserted into an opening provided in a room wall or a ceiling surface and has an electric motor having fixed blades therein, and an air flow in the central part thereof so as not to obstruct the flow of air. A base portion having a formed orifice and a flange portion extending on the outer periphery so as to come into contact with the chamber wall or the ceiling surface, and the tubular portion and the base fixed to the flange portion of the base portion. And a louver that covers the indoor opening of the section from the indoor side, and the tube section and the base section are divided to include various tube sections with different blades and electric motor specifications, and the base section can be freely and detachably configured. And a fan for pipes. 2. A tubular portion, which is mounted in a pipe inserted into an opening provided in a room wall or a ceiling surface and has an electric motor having fixed blades therein, and an air flow in the central portion thereof so as not to obstruct the flow of air. A base portion having a formed orifice and a flange portion extending on the outer periphery so as to come into contact with the chamber wall or the ceiling surface, and the tubular portion and the base fixed to the flange portion of the base portion. A louver that covers the indoor side opening of the section from the indoor side, and the cylindrical section and the base section are divided and various base sections having different shapes such as circles and squares are provided, and the cylindrical section can be freely and detachably attached. A fan for pipes configured. 3. A sensor for automatically turning on / off a fan for a pipe in response to a sensor such as human presence, humidity, smoke, dew condensation, differential pressure, and the like, and a circuit board including this sensor is attached to and detached from an electrical box. The pipe fan according to claim 1 or 2, wherein the fan has a possible structure and is detachably provided on the base portion. 4. The fan for pipes according to claim 1, 2 or 3, wherein the tubular portion is turned upside down and detachably provided on the base portion. 5. A structure in which an electric motor lead wire directly connected to an electric motor provided inside a tubular portion, a capacitor, a connection terminal or a circuit board and a circuit case as a housing for the electric motor lead wire can be attached to and detached from the electric motor lead wire as an electrical component. And an electric component part thereof is detachably provided on the base part.
The fan for pipes according to 3 or 4. 6. A shutter support part is integrally molded with the base part in order to prevent backflow of outside air into the room through an orifice opening formed in the base part, and the shutter support part is fitted into the shutter support part and can be opened and closed. 5. A solenoid for driving the motor is arranged in a circuit case.
Alternatively, the pipe fan according to item 5.