JP2017181012A - Air Curtain - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air curtain in which either windless region or gentle wind region is made small and its cutoff performance is improved.SOLUTION: An air curtain of this invention comprises a fixing plate 2 installed at a wall surface 1; a back surface panel 3 fixed to the fixing plate 2; an outer contour panel 4 fixed to the back surface panel 3; an electric motor 5 installed at an inside part enclosed by the back surface panel 3 and the outer contour panel 4; and a transverse fan 6 fixed to the electric motor 5. Its feature consists in the fact that a lower surface 10 of the outer contour panel 4 is provided with a blowing-out port 13, either the upper surface 9 or the front surface 11 of the outer contour panel 4 is provided with a suction port 12, a part constituting the blowing-out port 13 is provided with an air flow guider 21 and the air flow guider 21 guides the air blown out of the blowing-out port 13 in such a way that a part of it may flow eccentrically toward a space just below the electric motor 5.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an air curtain.

  Air curtains are used at the entrances and exits of grocery stores and restaurants to block the outside air with a curtain-shaped air flow, making it difficult to escape indoor air-conditioning heat and blocking the entry of dust from the outside. Is done. In addition, air curtains that use a cross-flow fan system are widely used for the purpose of sending out a wide and uniform curtain-like airflow for the purpose of increasing the blocking efficiency (see, for example, Patent Document 1).

JP 2001-116318 A

  In such a conventional air curtain, an electric motor and a cross-flow fan are incorporated in the main body for the purpose of blowing a curtain-shaped airflow. For this reason, the portion where the electric motor is arranged does not become a wind path, and there is a non-wind region or a light wind region where there is not much wind speed of the blown airflow immediately below the motor. There has been a problem that the air curtain blocking performance is deteriorated when dust or heat passes through the windless area.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to improve the air curtain blocking performance by reducing the windless area and the like.

  In order to achieve this object, an air curtain according to an aspect of the present invention includes an outer panel that forms an outer shell, a suction port on an upper surface or a front surface of the outer panel, and an air outlet on a lower surface of the outer panel. A motor that guides air from the suction port to the air outlet, a cross-flow fan that is attached in the direction of the rotation axis of the motor, and a part of the air that is blown from the air outlet is guided toward a space directly below the motor. And an airflow guider that achieves the intended purpose.

  ADVANTAGE OF THE INVENTION According to this invention, the air curtain which made the non-wind area | region or the breeze area | region small and improved the interruption | blocking performance can be provided.

Schematic of the side cross section of the air curtain according to the first embodiment of the present invention. Schematic of the front cross section of the air curtain Enlarged view of the air curtain around the airflow guider

  Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1)
FIG. 1 is a schematic side sectional view of an air curtain according to an embodiment of the present invention, and FIG. 2 is a schematic front sectional view of the air curtain.

  As shown in FIG. 1, the air curtain is fixed to a mounting plate 2 provided on a wall surface 1 by attaching a back panel 3 constituting an outer panel 4. Here, the attachment plate 2 and the back panel 3 are attached with a fitting structure by a hooking claw (not shown), and a part is fastened by, for example, a screw to prevent the dropping.

  The back panel 3 is a part of the outer panel 4, and includes an electric motor 5 and a cross-flow fan 6 inside the outer panel 4. Here, the back panel 3 and the outer panel 4 excluding the back panel 3, that is, the front panel, are partially fixed by fastening with screws, for example.

  The cross-flow fan 6 is provided between the rear guider 7 and the stabilizer 8 that constitute the air passage. Cross-flow fan 6 is provided in the direction of the rotation axis of electric motor 5. In other words, the rotating shaft of the electric motor 5 and the cross-flow fan 6 are connected in series in the length direction. In such a connection, in the installed state of the air curtain, a blind spot of the airflow is generated below the electric motor 5, that is, this region is a light wind region or a non-wind region.

  A suction port 12 is provided on the upper surface 9 of the outer panel 4, and an air outlet 13 is provided on the lower surface 10. Here, the upper surface 9 refers to the surface above the front surface 11, and the lower surface 10 refers to the surface below the front surface 11. Unlike the drawings, the suction port 12 may be provided on the front surface 11 of the outer panel 4.

  When the electric motor 5 is operated, the cross-flow fan 6 rotates and air flows from the suction port 12 as a suction airflow. The air that has flowed in flows along the rear guider 7 and the stabilizer 8, becomes a curtain-like air flow 14, and is sent out from the air outlet 13.

  Here, when the plane parallel to the wall surface 1 passing through the rotary shaft 31 of the once-through fan 6 is defined as the parallel surface 16, the blowout air flow 14 is located at the wall surface 1 side with respect to the parallel surface 16. Can be sent in the downward direction 20, which is preferable from the viewpoint of improving the blocking effect.

  In addition, the position of the suction port 12 provided on the front surface 11 side rather than the parallel surface 16 is preferable from the viewpoint of improving fan efficiency because the passage path of the air flow inside the fan can be lengthened.

  The air outlet 13 is provided with an air flow guider 21 for guiding a part of the air flow 14 in a direction. The airflow guider 21 is, for example, plate-shaped.

  As shown in FIG. 2, a part of the blown airflow 14 is guided by the airflow guider 21 to become a deflected airflow 25. The deflected airflow 25 is a part of the blown airflow 14 that is deflected toward the non-wind area or the breeze area immediately below the electric motor 5.

  In this way, by providing the airflow guider 21, it is possible to reduce the no-wind area or the breeze area directly below the electric motor 5. For this reason, it becomes difficult for dust, heat, etc. to pass through a windless area etc., and the interruption | blocking performance of an air curtain can be improved.

  A louver 26 is provided upstream of the airflow guider 21.

  The louver 26 has a function of changing the angle of the airflow from the outlet 13 in the front-rear direction, that is, in the direction of the wall surface 1 or in the direction of the front surface 11. The louver 26 has a plate shape and is provided corresponding to the width in the left-right direction of the cross-flow fan 6. Here, “corresponding” means substantially matching. The louver 26 includes a rotating shaft 27 in the vicinity of the upper end in the vertical direction. In other words, the louver 26 can be rotated in the front-rear direction of the air curtain by a predetermined angle about the rotation shaft 27 as an axis. The end of the louver 26 opposite to the rotating shaft 27, that is, the lower end is close to the recess 28 of the airflow guider 21.

  The concave portion 28 forms an arc-shaped space that is recessed downward with respect to the upper end surface of the airflow guider 21, and the concave portion 28 itself indicates a curve that forms a circular arc in the circular arc shape. When the louver 26 rotates, the arc is configured with a radius from the rotation axis 27 of the louver 26 to the lower end. The concave portion 28 is close to the lower end of the louver 26, thereby having an effect of suppressing pressure loss applied to the blown airflow flowing downstream through the louver 26. Further, by providing the airflow guider 21 at the lower portion of the louver 26, it is possible to prevent the louver 26 from dropping off when the rotatable louver 26 is disconnected due to, for example, an angle change operation in the front-rear direction.

  As shown in FIGS. 2 and 3, the cross-flow fan 6 may have one or a plurality of partition plates 22.

  The partition plate 22 is a plate for partitioning the air path in the blades constituting the cross-flow fan 6. The partition plate 22 can not only improve the strength of the blades but also suppress the turbulence of the wind flowing through the blades.

  A plane parallel to the partition plate 22 and passing through the partition plate 22 is referred to as a plate plane 23. Here, in the embodiment, the plate plane 23 is a plane passing through the side surface of the partition plate 22 on the electric motor 5 side.

  Although not directly below the electric motor 5, a windless area or a light wind area exists also immediately below the partition plate 22. That is, in the vicinity of the plate plane 23, the wind speed is weaker than the surroundings. By bringing the upper end of the airflow guider 21 close to the area near the plate plane 23, an increase in pressure loss can be suppressed and a part of the blown airflow 14 can be deflected more smoothly as the deflected airflow 25.

  More specifically, the distance 41 between the upper end of the airflow guider 21 and the plate plane 23 is preferably 0 to 5 mm. The distance 41 may exceed 5 mm. However, if the distance 41 exceeds 5 mm, the upper end of the airflow guider 21 is disposed in a region where the wind speed is stronger. Therefore, in the sense of suppressing an increase in pressure loss, the distance 41 is 5 mm or less is preferable. In this case, the upper end of the airflow guider 21 may be on the electric motor 5 side with respect to the plate plane 23 or may be on the opposite side of the electric motor 5.

  Since the number of plate planes 23 is basically the same as the number of partition plates 22, if there is one partition plate 22, there will be one plate plane 23, and if there are a plurality of partition plates 22, the plate plane 23 will also be Multiple.

  Of the one or more plate planes 23, the plate plane 23 closest to the electric motor 5 is defined as a first plate plane 24.

  The airflow guider 21 is preferably provided closer to the electric motor 5 than the first plate plane 24. According to this configuration, the deflected air flow 25 can be generated more efficiently than when provided near the other plate plane 23.

  In this case, in particular, the airflow guider 21 is preferably not provided on the opposite side of the electric motor 5 from the first plate plane 24. According to this structure, compared with the case where the airflow guider 21 is also provided in the vicinity of the other plate plane 23, the deflected airflow 25 can be generated efficiently while further suppressing an increase in pressure loss.

  The airflow guider 21 may be provided on the opposite side of the electric motor 5 from the first plate plane 24.

  Further, the airflow guider 21 is preferably inclined at an angle θ (0 ° <θ <10 °) with respect to a vertical plane 33 perpendicular to the rotation shaft 31 of the electric motor 5. The angle θ may exceed 10 °. However, if the angle θ exceeds 10 °, the pressure loss for making a part of the blown air flow 14 into the deflected air flow 25 becomes large. Therefore, in the sense of suppressing the increase in the pressure loss, the angle θ Is preferably greater than 0 ° and less than 10 °.

  As shown in FIG. 2, the electric motor 5 may be provided at the center between the left side surface 18 and the right side surface 19 of the outer panel 4. If the plane passing through the center and perpendicular to the rotating shaft 31 of the electric motor 5 is the central plane 32, at least two air flow guiders 21 are provided so as to be symmetrical with respect to the central plane 32. Is preferred.

  According to this configuration, it is possible to effectively reduce a windless region or the like directly below the electric motor 5 while suppressing an increase in pressure loss of the blown airflow 14. For this reason, the interruption | blocking performance of an air curtain can further be improved.

  Hereinafter, the embodiment will be supplemented.

  The air curtain according to one aspect of the present invention includes an outer panel 4 that forms an outer shell, a suction port 12 on an upper surface or a front surface of the outer panel 4, a blower port 13 on a lower surface of the outer panel, and the suction port from the suction port. An electric motor 5 that guides air toward the space directly below the electric motor 5, an electric motor 5 that guides air to the air outlet, a cross-flow fan 6 that is attached in the direction of the rotation axis of the electric motor, and a portion of the air that is blown out from the air outlet 13 A guider 21 is provided.

  According to this configuration, by providing the airflow guider 21 in a part constituting the air outlet 13, a part of the airflow 14 is directed toward the non-wind region or the light wind region generated by the arrangement of the electric motor 5 as the deflected air flow 25. Thus, it is possible to reduce the windless area directly below the motor 5. For this reason, the interruption | blocking performance of an air curtain can be improved.

  The cross-flow fan 6 has one or a plurality of partition plates 22, is a plane parallel to the partition plate 22, and a plane passing through the partition plate 22 is a plate plane 23, and an upper end of the airflow guider 21. The distance 41 between the plate plane 23 and the plate plane 23 is preferably 0 to 5 mm.

  According to this configuration, it is possible to reduce a windless region or the like directly below the electric motor 5 while suppressing an increase in pressure loss of the blown airflow 14. For this reason, the interruption | blocking performance of an air curtain can further be improved.

  The cross-flow fan 6 has one or a plurality of partition plates 22, is a plane parallel to the partition plates 22, and is a partition closest to the electric motor 5 among the one or more partition plates 22. A plane passing through the plate 22 is defined as a first plate plane 24, and the airflow guider 21 is provided closer to the electric motor 5 than the first plate plane 24, and is opposite to the electric motor 5 than the first plate plane 24. It is preferably not provided on the side.

  According to this configuration, it is possible to effectively reduce a windless region or the like directly below the electric motor 5 while suppressing an increase in pressure loss of the blown airflow 14. For this reason, the interruption | blocking performance of an air curtain can further be improved.

  The distance 41 between the upper end of the airflow guider 21 and the first plate plane 24 is preferably 0 to 5 mm.

  According to this configuration, it is possible to reduce a windless region or the like directly below the electric motor 5 while suppressing an increase in pressure loss of the blown airflow 14. For this reason, the interruption | blocking performance of an air curtain can further be improved.

  The airflow guider 21 is preferably inclined at an angle θ (0 ° <θ <10 °) with respect to a vertical plane 33 perpendicular to the rotation shaft 31 of the electric motor 5.

  According to this configuration, it is possible to reduce a windless region or the like directly below the electric motor 5 while suppressing an increase in pressure loss of the blown airflow 14. For this reason, the interruption | blocking performance of an air curtain can further be improved.

  The electric motor 5 is provided at the center between the left side surface 18 and the right side surface 19 of the outer panel 4, and is a surface passing through the center and centering on a surface perpendicular to the rotating shaft 31 of the electric motor 5. Preferably, at least two air flow guiders 21 are provided so as to be bilaterally symmetric with respect to the central surface 32.

  According to this configuration, it is possible to effectively reduce a windless region or the like directly below the electric motor 5 while suppressing an increase in pressure loss of the blown airflow 14. For this reason, the interruption | blocking performance of an air curtain can further be improved.

  In addition, it is preferable that a louver 26 that changes the angle in the front-rear direction of the airflow blown from the air outlet 13 is provided, and the airflow guider 21 is provided on the downstream side of the louver 26.

  According to this configuration, even if the louver 26 is disconnected, the airflow guider 21 can be prevented from falling off.

  The airflow guider 21 preferably includes a recess 28 that is a recess close to the end of the louver 26 opposite to the rotating shaft 27.

  According to this configuration, the recess 28 has an effect of suppressing pressure loss applied to the blown airflow flowing downstream through the louver 26 by being close to the lower end of the louver 26.

  The air curtain of the present invention can be applied not only for the purpose of blocking outside air at the entrance of a building, but also for use as a circulator for stirring room air by diverting it to a blower device incorporating a cross-flow fan.

DESCRIPTION OF SYMBOLS 1 Wall surface 2 Mounting plate 3 Back panel 4 Outer panel 5 Electric motor 6 Cross-flow fan 7 Rear guider 8 Stabilizer 9 Upper surface 10 Lower surface 11 Front surface 12 Suction port 13 Outlet 14 Outlet airflow 18 Left side surface 19 Right side surface 20 Downward direction 21 Airflow guider 22 Partition plate 23 plate plane 24 first plate plane 25 deflected air flow 26 louver 27 rotation axis (louver)
28 Concave portion 31 Rotating shaft 32 Center surface 33 Vertical surface 41 Distance θ Angle

Claims (8)

In the air curtain,
An outer panel forming an outer shell, and
A suction port on the upper surface or front surface of the outer panel;
An air outlet on the lower surface of the outer panel;
An electric motor for directing air from the suction port to the outlet;
A once-through fan attached in the direction of the rotation axis of the electric motor;
An airflow guide comprising: an airflow guider for guiding a part of the air blown from the blowout port toward a space immediately below the electric motor. The cross-flow fan includes one or more partition plates,
The air curtain according to claim 1, wherein a distance between a plate plane parallel to the partition plate and passing through the partition plate and an upper end of the airflow guider is 0 to 5 mm. The cross-flow fan includes one or more partition plates,
The airflow guider
The first plate plane parallel to the partition plate through the partition plate closest to the motor among the one or a plurality of the partition plates is provided on the motor side;
The air curtain according to claim 1, wherein the air curtain is not provided on a side opposite to the electric motor side with respect to the first plate plane. The air curtain according to claim 3, wherein a distance between an upper end of the airflow guider and the first plate plane is 0 to 5 mm. The airflow guider
The air curtain according to any one of claims 1 to 4, wherein the air curtain is inclined at an angle θ (0 ° <θ <10 °) with respect to a vertical plane perpendicular to the rotation axis. The electric motor is provided at the center between the left side surface and the right side surface of the outer panel,
The airflow guider
2. The air curtain according to claim 1, wherein at least two air curtains are provided so as to be bilaterally symmetric with respect to a center plane that passes through the center and is perpendicular to the rotation axis. A louver that changes the angle in the front-rear direction of the airflow blown out from the air outlet,
The airflow guider
The air curtain according to claim 1, wherein the air curtain is provided on a downstream side of the louver. 8. The air curtain according to claim 7, wherein the airflow guider includes a recess that is a recess close to an end portion on the opposite side to the rotation axis of the louver.

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