JP7108335B1 - air curtain device - Google Patents

Abstract

An object of the present invention is to provide an air curtain device that has a relatively low introduction barrier and can flexibly respond to changes in layout. An air curtain device (1) includes a base (2), a cylindrical casing (3) mounted on the base and having an air outlet (13) and a suction port (14) formed therein, and a cross flow fan housed in the casing. 20 and a fan motor for rotationally driving the cross-flow fan. The casing has a half-cylindrical first casing portion 11 having an air outlet and a suction port, and the peripheral wall overlaps the first casing portion and has a central angle larger than that of the first casing portion. It has a cylindrical second casing part 12 which is notched longitudinally. The second casing part or the first casing part is fixed to the base. The first casing part or the second casing part is rotatably inserted into or out of the second casing part or the first casing part. [Selection diagram] Fig. 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air curtain device that isolates people facing each other with curtain-like air currents.

In the current situation of the corona wreck, for example, it is becoming common to reduce the risk of droplet infection by partitioning between customers at restaurants with acrylic partitions.

The employees and the like have to repeat sterilization work such as wiping the partition with a cloth impregnated with a sterilizing agent every time there is a change of customers, which imposes a heavy burden.

Further, conventionally, an air curtain device exists. Many air curtain devices are installed on wall surfaces such as entrances and exits, and are used to block outside air (see Patent Documents 1, 2, and 3).

If an air curtain device is used like a partition to partition off customers, a large amount of construction work is required, and the introduction barrier is not low. In addition, it is not possible to flexibly respond to changes in the dining table layout.

JP 2018-44737 A JP 2018-96545 A JP 2016-138709 A

An object of the present invention is to provide an air curtain device that has a relatively low introduction barrier and can flexibly respond to changes in layout.

An air curtain device according to an embodiment of the present invention includes a base, a cylindrical casing mounted vertically on the base, and having a peripheral wall provided with an air outlet and a suction port wider than the air outlet, A cross-flow fan is housed in the casing with a predetermined gap therebetween, and a fan motor is provided on the base and drives the cross-flow fan to rotate. The casing has a half-cylindrical first casing portion having an air outlet, and a suction port. and a split cylindrical second casing portion. The second casing part or the first casing part is fixed to the base. The first casing part or the second casing part is rotatably inserted into or out of the second casing part or the first casing part.

FIG. 1 is a perspective view showing an air curtain device according to an embodiment of the invention. 2 is an exploded view of the air curtain device of FIG. 1. FIG. 3 is a cross-sectional view of the air curtain device of FIG. 1. FIG. FIG. 4 is a diagram showing the angle change of the air blowing direction with respect to the suction direction of the air curtain device of FIG. FIG. 5 is a diagram showing an installation example of the air curtain device of FIG. FIG. 6 is a diagram showing an example in which the air curtain devices of FIG. 1 are installed in tandem. FIG. 7 is a diagram showing an example in which the air curtain devices of FIG. 1 are vertically stacked. FIG. 8 is a diagram showing an example in which the air curtain device of FIG. 1 is installed so as to surround an object.

An air curtain device according to an embodiment of the present invention will be described below with reference to the drawings.
As shown in FIGS. 1(a), 1(b), 2, and 3, the air curtain device 1 according to the present embodiment has a short cylindrical base 2 and a cylindrical casing 3 arranged vertically. be placed. The top of the casing 3 is closed with a circular cover plate 5 . In practice the cover plate 5 is fixed to the upper edge of the second casing part 12 .

The peripheral wall of the casing 3 is provided with an air outlet 13 having a vertically elongated slit parallel to the axial direction. drilled parallel to the A mesh guard 16 is fitted in the suction port 14 .

Inside the casing 3 , a cross-flow fan 20 is housed coaxially with the casing 3 with a predetermined gap from the inner surface of the casing 3 . The base 2 incorporates a fan motor (not shown) for rotating the cross-flow fan 20 . A drive shaft 19 of the fan motor protrudes upward from the base 2 and is connected to the central shaft of the cross-flow fan 20 . A switch or a pair of buttons 4 for turning on/off the fan motor is provided on the peripheral surface of the base 2 .

The casing 3 has a half-cylindrical first casing portion 11 having an air outlet 13 and a suction port 14. The peripheral wall overlaps the first casing portion 11 and has a central angle θ2 of the first casing portion. It consists of a cylindrical second casing portion 12 which is longitudinally split at two locations so as to be larger than the central angle θ1 of 11 and which is notched. The first casing part 11 is aligned with respect to the second casing part 12 so as to close the notch in the second casing part 12 .

The second casing part 12 is fixed on the base 2 and the first casing part 11 is rotatably inserted into the second casing part 12 . Alternatively, the first casing portion 11 may be fixed on the base 2 and the second casing portion 12 may be rotatably fitted over the first casing portion 11 . The outer diameter of the first casing portion 11 is set to a dimension such that the outer surface of the first casing portion 11 slides against the inner surface of the second casing portion 12 . By rotating the first casing part 11, the angle of the outlet 13 with respect to the inlet 14 can be changed, ie the angle between the suction direction and the blowing direction can be changed.

The outlet 13 is centrally arranged in the first casing part 11 and the inlet 14 is centrally arranged in the second casing part 12 . A longitudinally long guide plate 15 projects toward the cross-flow fan from the inner surface of the first casing portion 11, at the edge of the outlet 13, particularly at the edge on the downstream side in the rotation direction of the cross-flow fan 20. As shown in FIG. The air sucked from the suction port 14 as the cross-flow fan 20 rotates flows through the gaps between the cross-flow fan 20 and the first and second casing parts 11 and 12, and flows along the guide plate 15 to the blow-out port. It blows out from 13.

A central angle θ1 of the first casing portion 11 is set to 180 degrees+α. α is set to, for example, 5 degrees or an approximation thereof. The central angle θ2 of the second casing portion 12 is set to 270 degrees, which is wider than the central angle θ1 of the first casing portion 11 by approximately 90 degrees. The first casing part 11 can be rotated approximately 90 degrees with respect to the second casing part 12 .

The first casing part 11 is movable in a range of approximately 90 degrees. No matter where the first casing portion 11 is located within the movable range RM, the first casing portion 11 closes the notch of the second casing portion 12 and the outlet 13 is located in the notch of the second casing portion 12. The first casing part 11 is aligned with respect to the second casing part 12 so as to ensure an open state inside.

A circular protrusion 17 is provided on the surface of the cover plate 5 , and a circular recess (not shown) that fits into the protrusion 17 is provided on the bottom surface of the base 2 . A claw portion 18 projects horizontally from the peripheral surface of the convex portion 17 , and a recess for receiving the claw portion 18 is provided in a concave portion of the bottom surface of the base 2 . By fitting the projections 17 into the recesses while aligning the claws 18 with the recesses, a plurality of air curtain devices 1 can be vertically stacked while aligning the suction ports 14 .

FIGS. 4(a) and 4(b) show a posture (zero degree posture) in which the first casing portion 11 is arranged at a position (zero degree) on the upstream side of the movable range RM, and FIG. 4(c). , (d) show the posture (central posture) in which the first casing portion 11 is arranged at the position of 45 degrees, which is the center of the movable range RM, and FIGS. The posture (90-degree posture) in which the casing portion 11 is arranged at the position of the other end (90-degree) on the downstream side of the movable range RM is shown. In the center posture, in a plan view, the angle of the direction from the cylinder center C to the center of the air outlet 13 (air outlet direction) with respect to the direction from the cylinder center C to the center of the air inlet 14 (intake direction) is 180 degrees. . In the zero-degree posture, in plan view, the angle of the blowing direction with respect to the suction direction is 135 degrees, which is 45 degrees to the upstream side from the central posture. In the 90-degree posture, the angle of the blow-out direction with respect to the suction direction is 135 degrees, which is 45 degrees bent downstream from the central posture.

By rotating the first casing portion 11 in this way, the angle of the blowout direction with respect to the suction direction can be changed within a range of 90 degrees, so that various layouts can be made according to the situation in which a plurality of air curtain devices 1 should be shut off. can be changed. Most typically, as shown in FIGS. 5(a) and 5(b), by arranging two air curtain devices 1 in a central position in tandem, it is possible to It is possible to partition the space and suppress mutual droplet infection. As shown in FIG. 6, by arranging a larger number of air curtain devices 1 in tandem, it is possible to partition between many eating and drinking customers G seated vertically and horizontally, effectively suppressing mutual droplet infection.

As shown in FIG. 7, by vertically stacking a plurality of air curtain devices 1 and arranging them in tandem, pedestrians P1 and P2 in a standing posture are effectively partitioned to prevent mutual droplet infection. can be suppressed. As shown in FIGS. 8(a) and 8(b), by arranging four air curtain devices 1 in four directions in a mixture of 0-degree postures and 90-degree postures, customers G1 and G2 can be placed next to customer G3. - Can be isolated against G6 to effectively reduce mutual droplet transmission.

As described above, according to the present embodiment, no installation work is required, and by arbitrarily laying out the air curtain device 1, it is possible to easily take measures to prevent splashes, so that the introduction barrier can be lowered. can. Further, by rotating the first casing portion 11 arbitrarily, it is possible to flexibly cope with layout changes. Since it is an air curtain, there is no need for sterilization work such as with acrylic partitions, so it is possible to suppress an increase in work load.

It should be noted that the present invention is not limited to the above-described embodiment, and various modifications can be made at the implementation stage without departing from the scope of the present invention. Further, each embodiment may be implemented in combination as appropriate, in which case the combined effect can be obtained. Furthermore, various inventions are included in the above embodiments, and various inventions can be extracted by combinations selected from a plurality of disclosed constituent elements. For example, even if some constituent elements are deleted from all the constituent elements shown in the embodiments, if the problem can be solved and effects can be obtained, the configuration with the constituent elements deleted can be extracted as an invention.

REFERENCE SIGNS LIST 1 air curtain device 2 base 3 casing 4 button 5 cover plate 20 cross flow fan 11 first casing portion 12 second casing portion 13 outlet 14 …Suction port.

Claims (8)

a base;
a cylindrical casing that is vertically mounted on the base and has a peripheral wall provided with an air outlet and a suction port wider than the air outlet;
a cross-flow fan housed in the casing with a predetermined gap therebetween;
a fan motor provided on the base for rotationally driving the cross-flow fan;
The casing is
a half-cylindrical first casing portion having the outlet;
a cylindrical second casing portion having the suction port, a peripheral wall of which overlaps the first casing portion, and which is longitudinally cut so that the center angle is larger than that of the first casing portion; have
The second casing part or the first casing part is fixed to the base,
The air curtain device, wherein the first casing portion or the second casing portion is rotatably inserted into or outside the second casing portion or the first casing portion. 2. The air curtain device of claim 1, wherein the outer surface of the first casing portion or the inner surface of the second casing portion slides against the inner surface of the second casing portion or the outer surface of the first casing portion. 2. The air curtain device according to claim 1, wherein the central angle .theta.2 of the second casing portion is approximately 90 degrees greater than the central angle .theta.1 of the first casing portion. 2. An air curtain device according to claim 1, wherein the central angle of said first casing portion is approximately 180 degrees and the central angle of said second casing portion is approximately 270 degrees. A gap between the inner surface of the first casing portion and the crossflow fan is closed at the edge portion of the outlet on the downstream side in the direction of rotation of the crossflow fan, which is the inner surface of the first casing portion. 2. The air curtain device according to claim 1, wherein a guide plate for the cross flow fan protrudes toward the cross flow fan. 2. The air curtain device of claim 1, wherein a circular cover plate is attached to said second casing portion. 7. The apparatus according to claim 6, wherein a surface of said cover plate is provided with a convex portion, and a bottom surface of said base is provided with a concave portion that engages with said convex portion, so that another air curtain device can be vertically stacked. Air curtain device. 2. The air curtain device according to claim 1, wherein a mesh guard is attached to said suction port.

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