JPH07190442A - Induced draft device - Google Patents

Abstract

PURPOSE:To enable simple and smooth fitting and removal of a main body without providing any special inspection opening, by fitting the main body removably to a fitting metal part fitted to the inside of the ceiling or the like, with an engagement part thereof interposed. CONSTITUTION:A jet orifice provided in a nozzle being operated continuously for a long time becomes faulty in jetting due to deposition of dust or a foreign substance and it turns impossible to ensure a prescribed quantity of pressurized air 21. Besides, an unstable state such as a pulsating flow occurs, an inducing action whereby air inside a main body l is drawn onto the second duct 7 side lowers and exhaustion of unclean air 22 in a room 3 outdoors 6 comes to be hindered. In such a case as the above, a second duct 7 and an air duct 15 are removed through an inspection opening 14 provided in a ceiling surface 2, then the main body 1 held by and fixed to a fitting metal part 14 is slided in the direction of a plane, an engagement part 10 is thereby disengaged and the main body is taken out into the room 3 through the inspection opening 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induced draft device mainly used for ventilation of houses and the like.

[0002]

2. Description of the Related Art In recent years, housing has become highly airtight,
As a result, the need for ventilation is increasing, and there is a demand for low noise, more comfortable ventilation, and particularly good workability.

For this reason, conventionally, the induction blower does not use an electric motor or a blade that is a source of noise, and a specific document cannot be cited as a ventilation means that does not require electric work. There was something like the one shown. Less than,
The configuration will be described with reference to FIGS. 6 and 7.

As shown in the figure, a first duct 106, which penetrates the ceiling 104 and communicates with a room 105, is connected to one end of a main body 103 of the induction blower provided inside the ceiling 102. At the same time, a second duct 109 penetrating the outer wall 107 and communicating with the outdoor 108 is connected to the other end portion.
The duct 106 and the second duct 109 form an exhaust passage 110 that connects the interior 105 and the exterior 108. A mounting bracket 112 is provided on the outer peripheral portion 111 of the main body 103, the mounting bracket 112 is held and fixed to the rafter 113 by a wood screw 114, and an inspection port 115 is provided near the main body 103. .

Further, inside the main body 103, one end portion of a blower duct 116 is provided so as to penetrate the wall portion thereof, and an injection port 117 is provided at the tip of this end portion with a throttle portion 11.
A nozzle 119 located substantially at the center of 8 and facing the second duct 109 side is provided. The other end of the air duct 116 is connected to a blower (not shown) installed outside the room 108. In the above configuration, when the blower is operated and the pressurized air 120 is jetted from the jet port 117 of the nozzle 119 through the blower duct 116, the air inside the main body 103 is changed to the second duct 109.
An attracting action that is attracted to the side is generated, and due to this attracting action, the dirty air 121 in the room 105 is sucked from the suction port 122 of the first duct 106, passes through the first duct 106, and enters the inside of the main body 103. It flows in, passes through the second duct 109 together with the pressurized air 120, and is discharged to the outside 108.

[0006]

In the structure of such a conventional induction blower, although the noise can be reduced, the nozzle 1 can be operated by operating the main body 103 of the induction blower for a long time.
When the tip of 19 has a poor ejection due to the accumulation of dust or foreign matter, the main body 103 must be removed from the rafter 113 and an inspection port 115 must be provided for maintenance and inspection. There is a problem that the inspection port 115 cannot be easily provided at the optimum location in the interior 102, so that the work of removing the second duct 109 and the wood screw 114 cannot be easily and reasonably performed.

In addition, the induction blower cannot be installed unless the exhaust direction is determined in each room 105, and the fitting 112 is held and fixed by the wood screw 114 depending on the sudden change in the exhaust direction or the design change of the customer. There is also a problem that it is necessary to remake the rafter 113 according to a new exhaust direction, and it takes a lot of labor and time for construction.

SUMMARY OF THE INVENTION The first object of the present invention is to solve the above problems, and it is a first object of the present invention to provide an induction blower which can easily and easily attach and detach a main body without providing an inspection port at a necessary and optimum place.

A second object of the present invention is to provide an induced draft device which can be easily installed even if the exhaust direction of each room is freely selected.

[0010]

In order to achieve the above object, the induction blower of the present invention has a first means, which has a substantially cylindrical shape and has an exhaust passage for communicating the inside and the outside of the room. A main body provided with an attracting means for attracting the air on the indoor side to the outdoor side by blowing pressurized air toward the outdoor side of the exhaust passage; and a locking portion provided on the outer peripheral surface of the main body.
A mounting metal fitting having an insertion hole into which the locking portion is inserted and slidably mounted is provided, the mounting metal fitting is mounted inside the ceiling or the like, and the main body is removably mounted via the locking portion.

A second means for achieving the above object is to provide a locking portion fixing hole radially arranged on one surface of a mounting metal fitting with which a locking portion provided on the main body engages. The mounting direction can be changed.

[0012]

According to the present invention, with the structure of the first means described above, the engaging portion provided on the outer peripheral surface of the main body is inserted into the insertion hole of the mounting member and slid, whereby the main body of the induction blower can be easily and comfortably attached. It will be possible to put on and take off.

Further, according to the structure of the second means, the exhaust direction can be freely selected and installed regardless of the exhaust direction of the induction blower or the direction of the rafter that holds and fixes the main body.

[0014]

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

As shown in the figure, a first duct 4 penetrating the ceiling 2 and communicating with the room 3 is connected to one end of the main body 1 of the induction blower, and the other end thereof is connected. A second duct 7 penetrating the outer wall 5 and communicating with the outdoor 6 is connected to the main body 1 and the first duct 4
The second duct 7 forms an exhaust passage 8 that connects the interior 3 and the exterior 6. A locking portion 10 formed in a substantially L-shape is provided on the outer peripheral surface 9 of the main body 1, and a fitting fitting is screwed to the rafter 11 so as to fit the locking portion 10. An insertion hole 13 is provided on one surface of the body 12, and the locking portion 10 is inserted into the insertion hole 13 and slid at the same time when the body 1 is held and fixed.

An inspection port 14 for maintenance and inspection is provided near the main body 1. The main body 1 of the induction blower is provided with one end of the blower duct 15 projecting through the wall portion, and the jet port 16 is located at the tip of this end at substantially the center of the throttle portion 17. A nozzle 18 facing the second duct 7 side is provided.

The other end of the blower duct 15 is connected to a blower 20 installed in the ceiling interior 19,
It is arranged so that the pressurized air 21 pressurized by the blower 20 is sent to the main body 1.

In the above structure, when the blower 20 is operated and the pressurized air 21 is jetted from the jet port 16 of the nozzle 18 through the blower duct 15, the air inside the main body 1 becomes the second air.
Of the dirty air 22 in the room 3 is sucked in through the suction port 23 of the first duct 4 and passes through the first duct 4. It flows into the inside of the main body 1, passes through the second duct 7 together with the pressurized air 21 and is discharged to the outside 6, but if the operation is continued for a long time, the injection port 16 provided in the nozzle 18 accumulates dust and foreign matter. Due to the ejection failure, the pressurized air 21 does not reach a predetermined air volume, and an unstable state such as a pulsating flow occurs, and the attracting action of drawing the air inside the main body 1 toward the second duct 7 side decreases. The dirty air 22 in the room 3 is no longer discharged to the outside 6, but in such a case, it is necessary to remove the main body 1 from the inside 19 of the ceiling for maintenance and inspection. From the main body 1 After the removed second duct 7 and blower duct 15 are removed, the main body 1 held and fixed to the fitting 12 is slid in the plane direction and locked from the insertion hole 13 provided in the fitting 12. By removing the portion 10, the main body 1 can be easily taken out from the inspection port 14 into the room 3 for maintenance and inspection.

As described above, according to the induction blower of the first embodiment of the present invention, the main body 1 of the induction blower can be easily removed from the fitting 12 without using any tool, and the maintenance and inspection of the main body 1 can be performed. You can

Next, a second embodiment of the present invention will be described with reference to FIG.
The description will be made with reference to FIG.

The same components as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in the figure, square holes 34 are provided at radial positions on a plane of a mounting member 33 formed by processing a sheet metal into an L-shape, and fixed to a rafter 36 with wood screws 35.

In the above structure, the main body 1 of the induction blower device
1 having a locking portion 10 protruding from the outer peripheral surface 9
Since the locking portion 10 is inserted into the locking portion fixing square hole 34 and then slid and held and fixed to the mounting fitting 33, the square hole 34 is retained even if the exhaust direction is suddenly changed.
Since they are provided in radial positions, even if the exhaust direction of the main body 1 is selected later according to the number of the square holes 34, the construction and the exhaust direction can be easily changed.

As described above, according to the induced draft air blower of the second embodiment of the present invention, due to a sudden change in the exhaust direction of the customer during the construction of the induced draft blower or after the construction, a design change due to a design defect, etc. Even if the exhaust direction of the main body 1 is changed, the work can be easily and simply performed by changing the square hole 34 into which the locking portion 10 is inserted along the radial position. If the mounting position is determined, the exhaust direction can be determined after the mounting fitting 33 is constructed, and the main body 1 can be constructed.

[0025]

As is apparent from the above embodiments, according to the present invention, the engaging portion projecting from the main body of the induction blower is provided with:
Since it can be removed from the insertion hole provided in the mounting bracket by simply sliding it without using a tool, it is possible to provide an induction blower device that allows easy and effortless maintenance and inspection.

Further, even if the mounting metal fittings are installed in advance before the exhaust air direction of the induction blower is suddenly changed or the exhausting direction is not determined during the construction, the locking portion provided at the radial position of the mounting metal fittings. After selecting the position of the fixing hole and determining the exhaust direction of the main body of the induction blower, it is possible to easily install the main body of the induction blower at a position that matches the predetermined exhaust direction. , Maintenance can be improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an installed state of an induction blower according to a first embodiment of the present invention.

FIG. 2 is a sectional view of the induction blower of the first embodiment.

FIG. 3 is a sectional view showing a construction state of the induction blower of the first embodiment.

FIG. 4 is a perspective view of a fitting of the induction blower of the second embodiment.

FIG. 5 is a bottom view showing an installed state of the induction blower of the second embodiment.

FIG. 6 is a cross-sectional view showing an installed state of a conventional induction blower.

FIG. 7 is a sectional view showing a construction state of a conventional induction blower.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 3 Indoor 6 Outdoor 8 Exhaust passage 9 Outer peripheral surface 10 Locking part 12 Mounting metal fitting 13 Inserting hole 17 Throttling part (induction means) 18 Nozzle (induction means) 21 Pressurized air (induction means) 33 Mounting metal fitting 34 Locking part Fixing hole

Claims (2)

[Claims] 1. An air discharge passage which is formed in a substantially cylindrical shape and which communicates the inside and the outside of the room, and blows pressurized air toward the outside of the exhaust passage to move the air inside the inside to the outside. The main body is provided with an attracting means for inducing, a locking portion provided on the outer peripheral surface of the main body, and a mounting fitting having an insertion hole into which the locking portion is inserted and slid to be mounted. An induction blower configured to be attached to the inside of a ceiling or the like and to which the main body is detachably attached via a locking portion. 2. A structure in which a locking portion fixing hole radially arranged is provided on one surface of a mounting bracket with which a locking portion provided on the main body engages, so that the mounting direction of the main body can be changed. Induction blower described.