TWI666413B - Ventilation fans for pipes - Google Patents

Abstract

A ventilating fan for a pipeline, comprising: a ventilating fan body formed with an air suction port and an exhaust port; a blower forming an air flow flowing from the suction port into the body of the ventilating fan and flowing out from the exhaust port; and a pipe connecting member (8), It is cylindrical and detachably assembled on the ventilator body to connect the exhaust port with the duct; the intake port is located indoors and installed in the ceiling; the air sucked from the room through the intake port is passed through the pipe connection member (8) Spit out to the pipeline, which is characterized in that it includes a baffle plate (9) which prevents outside wind from entering when the blower is stopped, and the baffle plate (9) is formed by a shaft portion formed on the pipe connection member (8) ( 23), and a bearing portion (26) formed on the baffle and having a hole through which the shaft portion (23) can pass, is supported by the shaft inside the pipe connection member (8), and the shaft portion (23) is located on the outdoor side A cylindrical shape with a notch along the axial direction is provided on the side surface, a protrusion is provided at the tip of the shaft portion (23), and the bottom surface portion of the protrusion is protruded to the outdoor side from the notched portion.

Description

   Ventilation fans for pipes   

The present invention relates to a ventilation fan for ducts including a baffle plate which prevents outside wind from entering when ventilation is stopped.

The ventilating fan for a pipe disclosed in Patent Document 1 is to improve the prevention of the invasion of outside wind. When the baffle is opened, when the baffle flies out of the pipe connecting member, it is bent before the exhaust pipe is connected to the pipe connecting member. When piping, the baffle cannot be fully opened, the baffle hits the exhaust pipe and is damaged, or there is a problem of deformation.

[Advanced technical literature]

[Patent Literature]

[Patent Document 1] Japanese Patent Application Laid-Open No. 11-281120

In a duct ventilation fan provided with a baffle, when a load caused by interference is applied to the baffle, sometimes the user's intention is violated and the baffle comes off from the pipe connection member. Interference factors until the product is assembled can be exemplified by vibrations applied during transportation, impacts applied when the product is dropped, and the hand of the operator hitting the baffle during assembly. Interference factors after product assembly can be exemplified by strong wind blowing into the pipeline. Although the invention disclosed in Patent Document 1 considers the bad situation after the baffle itself is operated, it does not consider preventing the baffle from detaching from the pipe connection member when a load caused by interference is applied to the baffle.

The present invention has been developed in view of the above circumstances, and an object thereof is to obtain a duct ventilation fan for reducing the detachment of a baffle from a pipe connecting member when a load is applied to the baffle.

In order to solve the above-mentioned problems and achieve the object, the present invention includes: a ventilating fan body formed with an air intake port and an exhaust port; a blower, which forms an airflow flowing from the intake port into the ventilating fan body and flowing out from the exhaust port; and a pipe The connecting member has a cylindrical shape and is detachably assembled on the ventilating fan body, and connects the exhaust port and the duct; the suction port is located on the indoor side so as to be installed in the ceiling, and the air that is sucked in from the room through the suction port, It is ejected to the pipe through the pipe connection member, and is characterized in that it includes a baffle plate that prevents outside wind from entering when the blower is stopped. The baffle is supported by a shaft inside the pipe connecting member by a shaft portion formed on the pipe connecting member and a bearing portion formed on the baffle and having a hole through which the shaft portion can pass. The shaft portion has a cylindrical shape with a notch along the axial direction on the side of the outdoor side. A protrusion is provided at the tip of the shaft portion, and the bottom portion of the protrusion protrudes from the portion provided with the notch to the outdoor side.

The ventilating fan for pipelines of the present invention exerts the effect of reducing the detachment of the baffle plate from the pipe connecting member when a load is applied to the baffle plate.

1‧‧‧ multi-wing blower

2‧‧‧Ventilation fan body

2b‧‧‧ exhaust port

3‧‧‧ Motor

4‧‧‧fan

5‧‧‧fan case

6‧‧‧ Suction port

7‧‧‧ spring fixing part

8‧‧‧Piping connection member

9‧‧‧ bezel

10‧‧‧ Spit Out

11‧‧‧Plastic terminal cover

12‧‧‧ Decorative grille

13‧‧‧Spring

14‧‧‧pipe

20‧‧‧Wire connection device

21‧‧‧rotary stop

22‧‧‧ Baffle Stop

23‧‧‧ Shaft

24‧‧‧ Tip

24a‧‧‧bottom face

25,29‧‧‧Plane Department

26‧‧‧Bearing Department

30‧‧‧ Parting line

Fig. 1 is a cross-sectional view showing a mounted state of a duct ventilation fan according to an embodiment of the present invention.

FIG. 2 is a bottom view of a state where the decorative grille is removed from the ventilation fan for the embodiment.

FIG. 3 is a bottom view of the state where the decorative grille is removed from the ventilating fan for the embodiment and the terminal cover is opened.

Fig. 4 is a view showing a state of a pipe connecting member of the ventilation fan for pipes according to the embodiment as seen from the outside of the house.

Fig. 5 is a cross-sectional view of a pipe connection member of a ventilation fan for a pipe according to an embodiment.

Fig. 6 is a cross-sectional view of a pipe connecting member of a ventilation fan for a pipe according to an embodiment.

Fig. 7 is a cross-sectional view of a pipe connection member of a ventilation fan for a pipe according to an embodiment.

Fig. 8 is a side view of a shaft portion of a ventilation fan for a duct according to an embodiment.

Fig. 9 is a front view of a shaft portion of a ventilation fan for a duct according to an embodiment.

Fig. 10 is a side view of a bearing portion of a ventilation fan for a duct according to an embodiment.

Fig. 11 is a front view of a bearing portion of a ventilation fan for a duct according to an embodiment.

Fig. 12 is an enlarged view of a shaft portion and a bearing portion of a ventilation fan for a duct according to an embodiment.

Fig. 13 is a view showing a modification of the shaft portion of the ventilating fan for the embodiment.

Hereinafter, a duct ventilation fan according to an embodiment of the present invention will be described in detail with reference to the drawings. Moreover, this embodiment is not intended to limit the inventor.

Implementation form.

FIG. 1 is a cross-sectional view showing the installation state of the duct ventilation fan according to the embodiment of the present invention. FIG. 2 is a bottom view of the state where the decorative grille of the ventilation fan for the embodiment is removed. FIG. 3 is a bottom view of the state where the decorative grille of the ventilating fan for the embodiment is removed and the terminal cover is opened. The ventilating fan 100 is provided in an opening provided on the ceiling, and the duct connecting member 8 is inserted from the indoor side to the duct 14 connecting the indoor and outdoor parts to ventilate the air in the chamber. The ventilating fan 100 is provided with: a multi-wing blower 1 as a blower for circulating air; and a fan case 5 containing the multi-wing blower 1. The multi-wing blower 1 includes a motor 3 and a fan 4 mounted on a shaft of the motor 3. The ventilating fan 100 includes: a ventilating fan body 2; and a duct connecting member 8, which are provided on the side of the ventilating fan body 2 and extend in a right-angle direction from the side of the ventilating fan body 2 and extend the outlet 10 to a position communicating with the duct 14.

The ventilating fan 100 includes a decorative grille 12 which is a new-style component starting from the fan case 5 to parts in which the interior of the ventilating fan body 2 cannot be seen from the room. The decorative grille 12 includes a spring 13 for mounting the body, and the spring 13 is hooked to a spring fixing portion 7 provided on the fan case 5, whereby the ventilation fan body 2 is fixed.

The duct 14 extends to the outside of the house to connect the covering body provided on the outer wall of the house, and forms a ventilation air path for the air in the house.

The ventilating fan body 2 is box-shaped with a closed lower surface, and a motor 3 is provided on the upper surface. The lower surface of the ventilating fan body 2 serves as an air inlet for taking in air from the room. An exhaust port 2b is formed on the side of the ventilation fan body 2. A duct connection member 8 is connected to the exhaust port 2b.

The pipe connecting member 8 is formed to have a stepped shape as the outer diameter decreases stepwise as it goes toward the side of the connecting pipe 14. The outer diameter of the pipe connection member becomes smaller stepwise, whereby the pipe connection member 8 is connectable to the plurality of pipes 14 having different inner diameters. In addition, the pipe connection member 8 has a drop so that when sealing the joint between the pipe connection member 8 and the pipe 14, the operation of winding the tape can be easily performed.

The fan case 5 includes a plastic terminal cover 11 that can be opened and closed. The plastic terminal cover 11 covers a wire connection device 20 that can be connected to an external power supply wire.

The electric wire connection device 20 and the motor 3 are electrically connected by an electric wire in the machine (not shown), and the electric power applied by an external power wire is passed through the terminal base to flow from the electric wire in the machine to the motor 3, thereby converting electric energy The rotary motion of the shaft of the motor 3 transmits the rotary motion to the fan 4, whereby the fan 4 rotates to form a flow of air.

The fan casing 5 houses the multi-wing blower 1, and the lower surface is opened to form a suction port 6. The air sucked into the fan casing 5 from the suction port 6 is sent to the exhaust port 2b along the inner wall of the fan casing 5 by the multi-wing blower 1, and is exhausted to the outside through the pipe connection member 8 and the pipe 14.

Fig. 4 is a view showing a pipe connecting member of a ventilation fan for pipes according to the embodiment as seen from the outside of the house. Fig. 5 is a cross-sectional view of a pipe connection member of a ventilating fan for a pipe according to the embodiment, and shows a cross-section taken along the line V-V in Fig. 4. FIG. 6 is a cross-sectional view of a pipe connecting member of a ventilation fan for a pipe according to the embodiment, and shows a cross-section taken along the line VI-VI in FIG. 4. FIG. 7 is a cross-sectional view of a pipe connecting member of a ventilation fan for a pipe according to the embodiment, and shows a cross-section taken along a line VI-VI in FIG. 4 in a state where the baffle plate 9 is closed. Inside the pipe connection member 8, a baffle plate 9 is opened and closed by wind pressure. FIG. 4 shows the pipe connection member 8 with the shutter 9 opened. The pipe connection member 8 is provided with a rotation stopper 21 that keeps the opening angle of the baffle 9 at a set angle, and a baffle stopper 22 that abuts the baffle 9 in the opened state. The baffle 9 is in the operation of the ventilation fan 100, and the multi-wing blower 1 is rotated until it abuts against the rotation stopper 21 by the wind pressure of the generated airflow, and the opening of the pipe connection member 8 is opened. In addition, the baffle plate 9 is rotated under its own weight when the ventilator fan 100 stops, and abuts against the baffle stopper 22 to block the opening of the duct connection member 8. The duct connection member 8 is provided with a baffle plate 9 so that when the ventilation fan 100 is stopped, wind from outside the house can be prevented from entering the room.

The shaft portion 23 provided on the pipe connection member 8 is a hole 28 penetrating the bearing portion 26 provided on the baffle plate 9. Therefore, the shaft portion 23 is pivotally supported by the bearing portion 26, and the baffle plate 9 can be rotated by wind pressure. In this embodiment, although the shaft portion 23 is integrated with the pipe connection member 8, it may be a different component. When the shaft portion 23 and the pipe connection member 8 are integrated, the shape of the pipe connection member 8 becomes complicated and the cost of parts increases. However, it is not necessary to assemble the shaft portion 23 and the pipe connection member 8. In addition, when the shaft portion 23 and the pipe connection member 8 are different parts, although the operation of assembling the shaft portion 23 and the pipe connection member 8 is required, the shape of the pipe connection member 8 becomes simple, so the cost of parts can be reduced.

Fig. 8 is a side view of a shaft portion of a ventilation fan for a duct according to an embodiment. Fig. 9 is a front view of a shaft portion of a ventilation fan for a duct according to an embodiment. The shape of the shaft portion 23 is a cylindrical shape provided with a notch along the axial direction on the side of the outdoor side. In the embodiment, the notch portion on the side of the shaft portion 23 is a flat portion 25. Therefore, the cross section perpendicular to the axis of the shaft portion 23 has a bow shape surrounded by a large arc of a cylindrical side portion and a chord forming the flat portion 25. Further, the tip 24 of the shaft portion 23 has a convex shape with a convex curved surface. In the example of the convex curved surface, although a hemispherical surface, a partial spherical surface, a rotating paraboloid, and an elliptical paraboloid can be exemplified, the present invention is not limited to this. The bottom surface portion 24 a protruding from the tip 24 is projected from the flat surface portion 25 to the outdoor side in an eave shape. Therefore, a gap is formed at the boundary between the tip 24 and the flat portion 25, and the shaft portion 23 is viewed from a direction orthogonal to the axial direction and parallel to the flat portion 25, and it is hook-shaped.

The cross-section of the shaft portion 23 has a bow shape surrounded by a large arc and a chord. Therefore, on the side of the shaft portion 23, a cylindrical side portion exists at more than half the circumference. Therefore, even if the flat surface portion 25 is provided, there is no obstacle to the rotation operation of the shaft portion 23.

Fig. 10 is a side view of a bearing portion of a ventilation fan for a duct according to an embodiment. Fig. 11 is a front view of a bearing portion of a ventilation fan for a duct according to an embodiment. The bearing portion 26 is in the form of a tongue piece standing upright from the main surface of the baffle 9, and the tip 24 of the shaft portion 23 is formed into a larger hole 28 that can pass through.

Fig. 12 is an enlarged view of a shaft portion and a bearing portion of a ventilation fan for a duct according to an embodiment. When an external force is applied from the outside of the house to the shutter 9 in the closed state, the flat surface portion 25 of the shaft portion 23 abuts on the edge of the hole 28 of the bearing portion 26. In a state where the flat portion 25 is in contact with the bearing portion 26, even if a force withdrawn from the hole 28 is applied to the shaft portion 23, the bottom surface portion 24a is pulled by the edge of the hole 28, whereby the shaft portion 23 is pulled from the hole 28 What happened was suppressed.

The ventilating fan for a pipe according to the embodiment is the direction of the load applied to the baffle 9 due to interference. When the fan is from the outside to the inside of the house, the bottom surface portion 24a is pulled by the edge of the hole 28. The fact that the hole 28 is pulled out is suppressed, so that it is possible to reduce the possibility that the baffle 9 is detached from the pipe connection member 8 in violation of the user's intention.

Further, when forming the shaft portion 23 by processing with a mold, a flat portion may be provided in a portion where a parting line exists. Fig. 13 is a view showing a modification example of the shaft portion of the ventilation fan for the embodiment. With the plane portion 25 as a reference, the parting line 30 is located in a direction of ± 90 degrees. Therefore, with the plane portion 25 as a reference, the plane portion 29 is provided in the directions of +90 degrees and -90 degrees. By providing the flat surface portion 29, the baffle plate 9 can be rotated without resistance by wind pressure even if there is interference from a burr or a slight positional deviation in the parting line 30.

In the above embodiment, although the shaft portion 23 is provided on the pipe connection member 8, the shaft portion may be provided on the baffle plate 9 and the bearing portion may be provided on the pipe connection member 8. When the shaft portion is provided on the baffle plate 9, the shaft portion can be integrated with the baffle plate 9 or can be made into different parts. When the shaft portion and the baffle plate 9 are integrally formed, the shape of the baffle plate 9 becomes complicated and the cost of parts increases. However, the operation of assembling the shaft portion and the baffle plate 9 becomes unnecessary. In addition, when the shaft portion and the baffle plate 9 are made of different parts, although the operation of assembling the shaft portion and the baffle plate 9 is required, the shape of the baffle plate 9 becomes simple, so that the cost of parts can be reduced.

In the above-mentioned embodiment, although the duct ventilation fan includes the multi-wing blower 1 as a centrifugal fan, an axial flow fan may be used to constitute the duct ventilation fan. Moreover, it can also be applied to a duct ventilation fan which constitutes a component of a ventilation system by combining with an air conditioner.

Further, in the above-mentioned embodiment, although the flat surface portion 25 is formed on the outer side surface of the shaft portion 23, it is sufficient that the notch is formed on the outer side surface of the shaft portion 23 and the tip 24 has a hook shape. That is, the side surface on the outside of the shaft portion 23 may not be planar.

The structure shown in the above embodiment is an example of the content of the present invention, and may be combined with other well-known technologies, and a part of the structure may be omitted or changed without departing from the scope of the present invention.

Claims (9)

A ventilating fan for a pipeline, comprising: a ventilating fan body formed with an air intake port and an exhaust port; a blower forming an air flow flowing from the intake port into the ventilating fan body and flowing out from the exhaust port; and a pipe connection member, It is cylindrical and removably assembled on the ventilating fan body, and communicates the exhaust port with the duct; the intake port is located indoors, so as to be installed in the ceiling, and the air sucked in from the room through the intake port The spit out to the pipeline through the pipeline connection member is characterized in that it includes a baffle to prevent outside wind from invading when the blower is stopped, and the baffle is formed by a shaft portion formed on the pipeline connection member, and A bearing portion formed on the baffle plate and having a hole through which the shaft portion can penetrate is supported by the shaft inside the pipe connection member. The shaft portion is provided on the side of the outdoor side and is provided with a notch along the axial direction. The cylindrical shape is provided with a protrusion at the tip of the shaft portion extending into the pipe, and the bottom surface of the protrusion is from the portion provided with the notch to the chamber. Side tabs. The ventilating fan for pipelines according to item 1 of the patent application scope, wherein the shaft portion is integrated with the pipeline connection member. The ventilating fan for pipelines according to item 1 of the scope of patent application, wherein the shaft portion and the pipeline connection member are different parts. A ventilating fan for a pipeline, comprising: a ventilating fan body formed with an air intake port and an exhaust port; a blower forming an air flow flowing from the intake port into the ventilating fan body and flowing out from the exhaust port; and a pipe connection member, It is cylindrical and removably assembled on the ventilating fan body, and communicates the exhaust port with the duct; the intake port is located indoors, so as to be installed in the ceiling, and the air sucked in from the room through the intake port The spit out to the pipeline through the pipeline connection member is characterized in that it includes a baffle plate to prevent outside wind from invading when the blower is stopped, the baffle plate is formed by a shaft portion formed on the baffle plate, and A bearing portion formed on the pipe connection member and having a hole through which the shaft portion can pass is supported by a shaft inside the pipe connection member, and the shaft portion is on a side surface with the baffle in a closed position, A cylindrical shape is provided with a notch along the axial direction. A protrusion is provided at a tip end of the shaft portion extending into the pipe. It has a prominent part of the aforementioned gap. The ventilating fan for pipelines according to item 4 of the scope of patent application, wherein the bearing portion is integrated with the pipeline connection member. The ventilating fan for pipelines according to item 4 of the scope of patent application, wherein the bearing portion is a different part from the pipeline connection member. The ventilating fan for pipelines according to any one of claims 1 to 6, wherein the notch portion on the side of the shaft portion is flat. The ventilating fan for pipes according to any one of claims 1 to 6, wherein the protrusion provided at the tip of the shaft portion has a convex curved shape. The ventilating fan for pipelines according to item 7 of the scope of patent application, wherein the protrusion provided at the tip of the shaft portion is convexly curved.