JPS598117Y2 - local air conditioner - Google Patents

Description

[Detailed Description of the Invention] The disclosed technology easily adjusts the air volume at the tip outlet of a flexible duct for local air blowing in a local air conditioner.

Therefore, this invention relates to a local air conditioner in which a flexible duct for local ventilation is connected to a fixed duct connected to an air blower, and an air volume adjustment damper is installed inside the flexible duct. A certain air volume adjustment damper is installed from a pair of semicircular louvers at the tip of the flexible duct outlet, and a pinion gear that rotates the worm gear provided on the louver is arranged so that the direction of the handle can be changed freely within the outlet. This relates to a local air conditioner to which a flexible handle shaft is connected.

Generally, a local air conditioner installed in a factory has a flexible duct 2 for local air blowing connected to a fixed duct 1 that communicates with an air blower (not shown), as shown in Fig. 1, and an outlet at the tip of the flexible duct 2. 2' faces the working section 3 so that air can be blown to the working section 3.

A damper for adjusting the amount of air blown by the flexible duct 2 is installed at the connection between the fixed duct 1 and the flexible duct 2, and the damper is opened and closed by rotating a suspended round bar handle 5. .

However, in the conventional air volume adjusting damper described above, the distance between the round bar handle 5 and the air outlet 2' is large, so the damper cannot be opened or closed at the working part 3, and the air flow from the air outlet 2' of each flexible duct cannot be controlled. There was a drawback that the air volume could not be adjusted freely.

In addition, there is a problem in that the damper using the round bar handle 5 cannot be installed when ductwork is performed using only flexible ducts.

Moreover, since the damper itself is located at a high position, maintenance operations are difficult to perform.

The purpose of this invention was to take into account the problems with air volume control dampers in conventional local air conditioners, and by installing a damper with a semicircular looper inside the outlet at the tip of the flexible duct, the above drawbacks could be removed and the characteristics of the flexible duct could be utilized. It is an object of the present invention to provide an excellent local air conditioner.

The structure of this invention in accordance with the above purpose is that the damper for adjusting the air volume blown from the flexible duct can be operated by a flexible handle shaft provided in the outlet at the tip of the flexible duct, and is opened and closed by rotating the handle shaft. The gist of the damper is that a pair of semicircular louvers are opened and closed in a stepless manner using the center of the inner diameter of the flexible shaft as a fulcrum, allowing air volume to be freely adjusted.

Next, an embodiment of this invention will be described below based on the drawings from FIG. 2 onwards.

Reference numeral 2 in the figure is a flexible duct for local air conditioning.
An air volume adjusting damper 3 is installed inside the tip outlet 2'.

The air volume adjusting damper 3 has a cylindrical damper body 4 housed inside the flexible duct 2, and a bolt 6 screwed into a mounting plate 5 provided on the outer periphery of the flexible duct 2.
Fixed by

In the center of the damper body 4, there are two shafts}7a,
7b, and semicircular loopers 8a, 8b are attached to these shafts 7a, 7b.
1 and 8b have a shape that allows the damper body 4 to be closed.

Further, the gap between the base ends of the loopers 8 a and 8 b is covered by a cover 9 , and a pinion gear 10 is installed in the cover 9 in the axial direction of the flexible duct 2 .
Both sides of the pinion gear 10 are engaged with worm gears 11 a11 b fixed to the shafts }7a, 7b.

A handle shaft 12 extending in the direction of the air outlet 2' is connected to the pinion gear 10, and a handle 13 is provided at the tip of the handle shaft 12.

The handle shaft 12 is made of wire rope and is flexible, so that the direction of the handle 13 can be changed freely.

In the above structure, the air from the air blower (not shown) as shown in FIG. ventilation is carried out.

The flexible duct 2 can be bent arbitrarily depending on the position of the work place 3, and the direction of the air outlet 2' can be changed.

Therefore, in order to adjust the air volume from the flexible ducts 1 and 2, the handle shaft 1 provided inside the air outlet 2' is used.
By rotating the handle shaft 12
The worm gear is rotated together with the pinion gear 10.
la and llb are rotated in opposite directions, thereby opening and closing the semicircular loopers 8a and 8b.

The rotation angle of the loopers 8 a and 8 b can be set to any desired state by rotating the handle shaft 12, so the air volume from the air outlet 2' can be adjusted steplessly according to this rotation angle. It becomes possible.

Moreover, since the handle shaft 12 is flexible,
As shown in FIG. 3, when the portion of the flexible duct 2 beyond the air volume adjustment damper 3 is bent as shown in chain lines, the handle shaft 12 can also be bent in the same way.

Note that the aspect of this invention is not limited to the above-mentioned embodiment; for example, the semicircular loopers 8a and 8b may be provided so as to open not toward the proximal end of the damper body 4 but toward the outlet 2' side. .

As mentioned above, according to this invention, the air volume adjustment damper is installed at the outlet of the flexible duct, so the damper can be operated at the outlet, and the damper can be opened and closed at a local working area. It is possible to freely adjust the air volume while changing the direction.

Further, since the air volume adjustment damper is composed of a semicircular louver that opens and closes steplessly, the air volume can be adjusted steplessly, improving the air volume adjustment ability.

Furthermore, the handle shaft that operates the opening and closing of the louver is flexible so that the direction of the handle can be changed within the outlet of the flexible duct. It can be bent and has the advantage of allowing the damper to be opened and closed at the outlet with ease.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a perspective view of a conventional local air conditioner, Fig. 2 and the following show embodiments of this invention, and Fig. 2 is a front view showing the outlet of the flexible shaft. FIG. 3 is a slope view of the air outlet. 1...Fixed duct, 2...Flexible duct, 2'...Tip outlet, 8a, 8b
...Louvre, 3...Air volume adjustment damper, 7 a, 7 b...Worm gear, 10
...Pinion gear, 13...Handle, 12...Handle shaft.

Claims (1)

[Scope of utility model registration request] A flexible duct is connected to a fixed duct connected to an air blower, and is shaped by a pair of semicircular louvers that rotate to open and close with a fulcrum at the center of the flexible duct within the tip outlet of the flexible duct. In a local air conditioner equipped with an air volume adjustment damper, a worm gear is installed at the fulcrum of each of the louvers, and a pinion gear meshing with each worm gear extends toward the outlet at the tip of the flexible duct. A local air conditioner characterized by being integrally connected to a flexible handle shaft that allows the direction of the handle to be changed.