JPH0354355Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to an air blowing device with an air chamber for air conditioning installed in a ceiling space, and in particular to a device that can adjust the air volume as appropriate. .

[Prior Art] Generally, this type of ceiling-type air blowing device has a seventh
As shown in the figure, it consists of a cylindrical blow-off cylinder 11 and a bowl-shaped diff user 12 connected to it. One end of the blow-off cylinder 11 is attached to the lower surface of an air chamber 14 connected to an air duct 13. It is configured so that the lower surface can be attached to the exposed surface of the ceiling 15. A damper plate 16 and its opening/closing device 17 are attached to the upper part of the blowing cylinder 11, so that the blowing air volume can be adjusted as necessary.

[Problems to be solved by the invention] In the conventional air blowing device, when adjusting the blowing air volume, as described above, the opening degree of the damper plate 16 is adjusted by adjusting the opening/closing device 1 provided below the damper plate 16.
Since the adjustment is made through the damper plate 7, the structure as a whole becomes complicated and the cost increases, and furthermore, there are problems in that the generation of wind noise due to the damper plate 16 is unavoidable.
In addition, the damper plate 16 allows the blowout cylinder 11 to
The air introduced into the interior mainly flows from one direction, but this incoming air flows through the blowout cylinder 1 which forms a rectifying area.
Since the length L of 1 is set short due to the space within the ceiling, sufficient rectification is not performed during this time, and the air blown from the diff user 12 tends to be deflected to the right side in the figure, as shown by the arrow. However, depending on the opening angle of the damper plate 16, the pulsation of the amount of introduced air becomes large.

[Means for Solving the Problems] The purpose of the present invention is to provide a ceiling-mounted air blowing device that has a simple structure, does not generate wind noise, and can provide stable blowing characteristics. .

In order to achieve this purpose, the ceiling-mounted blow-off device of the present invention has a blow-off cylinder attached to the lower surface of an air chamber connected to an air duct, and a diff user connected to the blow-off cylinder and attached to the ceiling surface. In the mold blowing device, an air volume adjusting cylinder which has elasticity and is always frictionally engaged with the blow cylinder is attached to the inner circumferential surface of the blow cylinder so as to be slidable in the vertical direction, and the air volume can be adjusted by adjusting the air volume. Adjustment is performed by changing the height of the airflow cylinder protruding from the blowout cylinder.

[Function] The air volume can be adjusted by simply sliding the air volume adjustment cylinder, and the air flowing into the blowout cylinder is evened out from the entire circumference of the opening end of the air volume adjustment cylinder and introduced smoothly. Therefore, the air volume adjustment mechanism is simplified, wind noise is prevented from occurring, and stable blowing characteristics can be obtained.

[Example] Hereinafter, an example of the present invention will be described with reference to the accompanying drawings. Note that the same members as those described in the conventional example will be described with the same reference numerals.

In FIG. 1, the ceiling-mounted air blowing device according to the present invention has a blowing cylinder 11 attached to the lower surface of an air chamber 14 connected to an air duct 13.
and a differential user 12 which is connected to this blow-off cylinder 11 and attached to the ceiling surface 15, and an air volume adjustment cylinder 1 (hereinafter abbreviated as inner cylinder) as shown below slides on the inner peripheral surface of the blow-off cylinder 11. Can be installed freely.

As shown in Fig. 2, this inner cylinder 1 is formed into a cylindrical shape by roll forming an elastic plate such as a galvanized iron plate or a plastic plate, and its wound ends 1a and 1b are slidable relative to each other. Overlap.

In the molded state, the inner cylinder 1 has an outer diameter d larger than an inner diameter D of the blowing cylinder 11.

In such a configuration, when the inner cylinder 1 is inserted into the blowout cylinder 11 in a state in which the circumferential surface is compressed to reduce its diameter, the inner cylinder 1 is elastically expanded in diameter against the inner circumferential surface of the blowout cylinder 11. frictionally engaged. In this way, the blowing device with the inner tube 1 installed in advance is attached to the ceiling surface 15, and when adjusting the air volume, for example, it is necessary to use the handle 3 provided on the lower part of the inner surface of the inner tube 1 to project inward. to slide the inner cylinder 1 in the vertical direction. In this case, the position of the inner cylinder 1 may be adjusted using a scale 2 (see FIG. 2) formed on the inner peripheral surface of the blow-off cylinder 11 as a guide.

In the blowing device having such a configuration, the dynamic pressure of the air blown from the air duct 13 is once converted to static pressure, and then the air is averaged and smoothly introduced from the entire circumference of the upper opening end of the inner cylinder 1. Therefore, there is no wind noise. Moreover, the inflowing air is spread over the length L of the blowout cylinder into the air chamber 1 of the inner cylinder 1.
Since the air is rectified in a rectifying region with a length equal to the length M of protrusion into the diffuser 12, and sufficient rectification is performed, the air blown from the diff user 12 is averaged as shown by the arrow. Further, since pulsations in the amount of blown air do not occur, the blown air characteristics are stabilized.
Furthermore, since the structure is simple in this way, the air volume can be adjusted easily and reliably. Note that the symbols Mmin and Mmax in the figure indicate the minimum protrusion length and maximum protrusion length of the inner cylinder 1 when adjusting the air volume.

3 and 4 show other embodiments of the present invention, in which projections 4, 5 protrude in the radial direction at both winding ends 1a and 1b at the overlapping portion of the inner cylinder 1, respectively. At the same time, one of the protrusions 5 is loosely fitted into a long hole 7 formed in the circumferential direction of the inner plate, and a spring 6 is stretched between the protrusions 4 and 5. In this way, the inner circumference 1
is always urged to expand its diameter, which helps the frictional engagement between the inner cylinder 1 and the blow-off cylinder 11, and prevents the inner cylinder 1 from shifting even if unexpected vibrations are applied to the blow-off port. never occurs.

5 and 6 show still another embodiment, in which at least one engagement protrusion 8 is formed protrudingly on the outer peripheral surface of the inner cylinder 1, and the inner peripheral surface of the blowing cylinder 11 is correspondingly formed. A plurality of engagement holes 9, 9 are provided in the axial direction of the cylinder 11. The engaging protrusion and the engaging hole are engaged with each other, so that the inner cylinder 1 is click-locked stepwise in the direction of the air chamber 14 or in the opposite direction. In this way, each engagement hole 9 serves as an air volume adjustment scale, and the position of the inner cylinder 1 is prevented from shifting during unexpected vibrations.

Note that the embodiments are merely a few preferred examples, and it goes without saying that various other modifications and modifications can be considered.

[Effects of the invention] As explained above, according to the ceiling-mounted air blowing device of the present invention, the air volume adjusting cylinder, which is slidably held in the vertical direction, is frictionally engaged with the inner peripheral surface of the blowing cylinder. As a result, the mechanism is simplified, and the cost of the blowing device is also reduced. On the other hand, wind noise generated in the blowing device is not only prevented, but also the blowing characteristics are stabilized. In addition, if the air volume adjustment cylinder is provided with a diameter expanding means as described above, or if a locking means is provided between the air volume adjustment cylinder and the blowout cylinder, the Also, effects such as preventing the displacement of the air volume adjusting cylinder are produced.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view of the ceiling-mounted air blowing device according to the present invention, Fig. 2 is a perspective view of the air volume adjustment cylinder in Fig. 1, and Fig. 3 is an enlarged view of the air volume adjustment cylinder. FIG. 4 is a sectional view taken along the - line in FIG. 3; FIG. 5 is a perspective view showing an example in which a click stop mechanism is attached to the air volume adjusting cylinder. , FIG. 6 is a sectional view taken along the - line in FIG. 5, and FIG. 7 is a partially cutaway side view of a conventional example of a ceiling-mounted air blowing device. 1...Cylinder for air volume adjustment, 2...Scale, 3...
Handle, 4, 5...Protrusion, 6...Coil spring, 7...Long hole, 8...Protrusion, 9...Engagement hole, 1
1...Blowout cylinder, 12...Diffusion user.

Claims (1)

[Claims for Utility Model Registration] 1. A ceiling-mounted blow-off device having a blow-off cylinder attached to the lower surface of an air chamber connected to an air duct, and a diff user connected to the blow-off cylinder and attached to a ceiling surface, comprising: 1. A ceiling-mounted air blowing device, characterized in that an air volume adjusting cylinder is frictionally engaged with an inner circumferential surface and the cylinder is attached so as to be slidable in an axial direction. 2. A ceiling-mounted air blower according to claim 1, in which a rectangular plate made of metal or synthetic resin is wound into a cylindrical shape, and the wound ends are overlapped with each other to form a cylinder for adjusting air volume. Device. 3. Protrusions projecting in the radial direction are provided at both winding ends of the overlapping portion of the air volume adjusting cylinder, and one of the protrusions is loosely fitted into a long hole in the circumferential direction formed in the inner plate. The ceiling-mounted air blowing device according to claim 1 or 2, further comprising a spring stretched between both the protrusions. 4. The scope of the utility model registration claim, wherein the air volume adjusting cylinder is provided with an engaging protrusion that protrudes outward, and the blow-out cylinder is provided with a plurality of engaging holes that engage with the engaging protrusion in the axial direction of the cylinder. The ceiling-mounted air blowing device according to any one of items 1 to 3.