JP6861333B2 - Air curtain - Google Patents

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-like air flow, making it difficult for the heat of heating and cooling inside the room to escape, and blocking the intrusion of dust from the outside. Will be done. Further, as an air curtain, a flow-through fan method is widely used for the purpose of transmitting a wide and uniform curtain-like air flow for the purpose of improving the blocking efficiency (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2001-116318

In such a conventional air curtain, an electric motor and a once-through fan are built in the main body for the purpose of blowing a curtain-like air flow. Therefore, the portion where the electric motor is arranged does not become an air passage, and there is a windless region or a breeze region where the wind speed of the blown airflow is not so much immediately below the electric motor. There is a problem that the blocking performance of the air curtain is lowered due to the passage of dust, heat, etc. through the windless region or the like.

Therefore, an object of the present invention is to improve the blocking performance of the air curtain by reducing the windless region and the like.

In order to achieve this object, the air curtain according to one aspect of the present invention includes an outer panel forming an outer shell, a suction port on the upper surface or the front surface of the outer shell panel, and an air outlet on the lower surface of the outer shell panel. , An electric motor that guides air from the suction port to the outlet, a once-through fan attached in the direction of the rotation axis of the electric motor, a louver that changes the angle of the airflow blown from the outlet in the front-rear direction, and blowout from the outlet. The airflow guider is provided with an airflow guider that guides a part of the air to be directed toward the space directly below the electric motor, and the airflow guider is provided on the downstream side of the louver and downwards with reference to the upper end surface of the airflow guider. It is characterized by forming an arc-shaped space that is recessed and having a recess that is a recess that is close to the end on the opposite side of the rotation axis of the louver , thereby achieving the intended purpose. Is.

According to the present invention, it is possible to provide an air curtain in which a windless region or a breeze region is reduced and the blocking performance is improved.

Schematic of a 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 airflow guider area of the air curtain

Hereinafter, examples of the present invention will be described with reference to the drawings.

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

As shown in FIG. 1, the air curtain is fixed to the mounting plate 2 provided on the wall surface 1 by mounting the back panel 3 constituting the outer panel 4. Here, the mounting plate 2 and the back panel 3 are mounted by a fitting structure using hook claws (not shown), and a part of the mounting plate 2 and the back panel 3 are fastened with screws to prevent them from falling off.

The back panel 3 is a part of the outer panel 4, and includes an electric motor 5 and a once-through fan 6 inside the outer panel 4 surrounded by 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 once-through fan 6 is provided between the rear guider 7 and the stabilizer 8 forming the air passage. The once-through fan 6 is provided in the direction of the rotation axis of the electric motor 5. In other words, the rotating shaft of the electric motor 5 and the once-through fan 6 are connected in series in the length direction. In such a connection, a blind spot of airflow is generated below the motor 5 in the installed state of the air curtain, that is, this region is a breeze region or a windless 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. Note that, 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 once-through fan 6 rotates, and air flows in as a suction airflow from the suction port 12. The inflowing air flows along the rear guider 7 and the stabilizer 8, becomes a curtain-shaped blown airflow 14, and is sent out from the blowout port 13.

Here, assuming that the surface parallel to the wall surface 1 passing through the rotation axis 31 of the once-through fan 6 is the parallel surface 16, the position of the outlet 13 should be provided on the wall surface 1 side rather than the parallel surface 16. Is preferable from the viewpoint of improving the blocking effect, because can be sent downward.

Further, it is preferable that the suction port 12 is provided on the front surface 11 side of the parallel surface 16 from the viewpoint of improving the fan efficiency because the passage path of the air flow inside the fan can be lengthened.

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

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 deflected toward a windless region or a breeze region directly under the electric motor 5.

By providing the airflow guider 21 in this way, it is possible to reduce the windless region or the breeze region directly under the electric motor 5. Therefore, it becomes difficult for dust, heat, etc. to pass through the windless region and the like, and the blocking performance of the 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 blown airflow from the outlet 13 in the front-rear direction, that is, in the wall surface 1 direction or the front surface 11 direction. The louver 26 has a plate shape and is provided so as to correspond to the width of the once-through fan 6 in the left-right direction. Correspondence here means to almost match. The louver 26 is provided with a rotation shaft 27 in the vicinity of the upper end portion in the vertical direction. That is, the louver 26 can rotate around the rotation shaft 27 at a predetermined angle in the front-rear direction of the air curtain. The end of the louver 26 opposite to the rotation shaft 27, that is, the lower end, is close to the recess 28 of the airflow guider 21.

The recess 28 forms an arc-shaped space that is recessed downward with respect to the upper end surface of the airflow guider 21, and the recess 28 itself refers to a curve that forms a circular arc in the arc shape. The arc is formed with the length from the rotation axis 27 of the louver 26 to the lower end as the radius when the louver 26 rotates. 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. Further, by providing the airflow guider 21 at the lower part of the louver 26, it is possible to prevent the louver 26 from falling off when the connection is disconnected by, for example, changing the angle of the rotatable louver 26 in the front-rear direction.

As shown in FIGS. 2 and 3, the once-through fan 6 may have one or more partition plates 22.

The partition plate 22 is a plate for partitioning the air passage in the blades constituting the once-through fan 6. The partition plate 22 not only improves the strength of the blades, but also suppresses 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 that passes through the side surface of the partition plate 22 on the motor 5 side.

Although not as much as directly under the electric motor 5, there is a windless region or a breeze region directly under the partition plate 22. That is, in the vicinity of the plate plane 23, the wind speed is weaker than the surrounding area. By bringing the upper end of the airflow guider 21 closer to the region near the plate plane 23, it is possible to suppress an increase in pressure loss and more smoothly deflect a part of the blown airflow 14 as a 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. This distance 41 may exceed 5 mm, but if it exceeds 5 mm, the upper end of the airflow guider 21 will be arranged in a region where the wind speed is stronger, so that the distance 41 is in the sense of suppressing an increase in pressure loss. 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 or on the opposite side of the electric motor 5 with respect to the plate plane 23.

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, the number of plate planes 23 is also one, and if there are a plurality of partition plates 22, the number of plate planes 23 is also one. There will be more than one.

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

The airflow guider 21 is preferably provided on the motor 5 side of the first plate flat surface 24. According to this configuration, the deflected airflow 25 can be generated more efficiently than that provided in the vicinity of the other plate plane 23.

In this case, it is particularly preferable that the airflow guider 21 is not provided on the opposite side of the electric motor 5 from the first plate flat surface 24. According to this configuration, the deflection airflow 25 can be efficiently generated while further suppressing the increase in pressure loss as compared with the case where the airflow guider 21 is also provided in the vicinity of the other plate plane 23.

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

Further, the airflow guider 21 is preferably tilted at an angle θ (0 ° <θ <10 °) with respect to the vertical surface 33 perpendicular to the rotation axis 31 of the electric motor 5. The angle θ may exceed 10 °, but if it exceeds 10 °, the pressure loss for converting a part of the blown airflow 14 into the deflection airflow 25 becomes large, so that the angle θ is in the sense of suppressing the increase in the pressure loss. 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 surface passing through the center and perpendicular to the rotation axis 31 of the electric motor 5 is the central surface 32, at least two airflow guiders 21 are provided so as to be symmetrical with respect to the central surface 32. Is preferable.

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

Hereinafter, embodiments will be supplemented.

The air curtain according to one aspect of the present invention includes an outer panel 4 forming an outer shell, a suction port 12 on the upper surface or the front surface of the outer shell panel 4, an air outlet 13 on the lower surface of the outer shell panel, and the suction port to the above. An electric motor 5 that guides air to the air outlet, a once-through fan 6 that is attached in the direction of the rotation axis of the electric motor, and an air flow that guides a part of the air blown out from the air outlet 13 toward the space directly under the electric motor 5. It is characterized by having a guider 21 and the like.

According to this configuration, by providing the airflow guider 21 in a part constituting the outlet 13, a part of the airflow 14 is directed to a windless region or a breeze region generated by the arrangement of the electric motor 5 as a deflection airflow 25. It is possible to reduce the windless region and the like directly under the electric motor 5. Therefore, the blocking performance of the air curtain can be improved.

Further, the once-through fan 6 has one or a plurality of partition plates 22, is a plane parallel to the partition plate 22, and the plane passing through the partition plate 22 is a plate plane 23, and the upper end of the airflow guider 21 is formed. 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 the windless region and the like directly under the electric motor 5 while suppressing the increase in the pressure loss of the blown airflow 14. Therefore, the blocking performance of the air curtain can be further improved.

Further, the once-through fan 6 has one or a plurality of partition plates 22 and is a flat surface parallel to the partition plate 22, and the partition closest to the electric motor 5 among the one or a plurality of the partition plates 22. The plane passing through the plate 22 is the first plate plane 24, and the airflow guider 21 is provided on the side of the electric motor 5 with respect to the first plate plane 24, and is opposite to the electric motor 5 with respect to the first plate plane 24. It is preferable that it is not provided on the side.

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

Further, 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 the windless region and the like directly under the electric motor 5 while suppressing the increase in the pressure loss of the blown airflow 14. Therefore, the blocking performance of the air curtain can be further improved.

Further, it is preferable that the airflow guider 21 is tilted at an angle θ (0 ° <θ <10 °) with respect to the vertical surface 33 perpendicular to the rotation axis 31 of the electric motor 5.

According to this configuration, it is possible to reduce the windless region and the like directly under the electric motor 5 while suppressing the increase in the pressure loss of the blown airflow 14. Therefore, the blocking performance of the air curtain can be further improved.

Further, 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, is a surface passing through the center, and is centered on a surface perpendicular to the rotation axis 31 of the electric motor 5. It is preferable that the surface 32 is provided and at least two airflow guiders 21 are provided so as to be symmetrical with respect to the central surface 32.

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

Further, it is preferable that the louver 26 for changing the angle of the airflow blown out from the outlet 13 in the front-rear direction is provided, and the airflow guider 21 is provided on the downstream side of the louver 26.

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

Further, it is preferable that the airflow guider 21 is provided with a recess 28 which is a recess close to an end portion of the louver 26 opposite to the rotation 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 the outside air at the entrance of a building, but also for an application as a circulator that agitates indoor air by diverting it to a blower device having a built-in once-through fan.

1 Wall surface 2 Mounting plate 3 Back panel 4 Outer panel 5 Electric motor 6 Throughflow fan 7 Rear guider 8 Stabilizer 9 Top surface 10 Bottom surface 11 Front surface 12 Suction port 13 Air outlet 14 Air flow 18 Left side 19 Right side 20 Downward 21 Air flow guider 22 23 Plate plane 24 First plate plane 25 Deflection airflow 26 Louver 27 Rotating axis (louver)
28 Recess 31 Rotation axis 32 Center surface 33 Vertical surface 41 Distance θ Angle

Claims (6)

In the air curtain
The outer panel that forms the outer shell and
With a suction port on the upper surface or front surface of the outer panel,
An air outlet on the underside of the outer panel,
An electric motor that guides air from the suction port to the air outlet,
A once-through fan mounted in the direction of the rotation axis of the electric motor,
A louver that changes the angle of the airflow blown out from the outlet in the front-rear direction,
It is provided with an airflow guider that guides a part of the air blown out from the outlet toward the space directly under the electric motor.
The airflow guider
Provided on the downstream side of the louver
An air curtain comprising an arc-shaped space that is recessed downward with respect to the upper end surface of the airflow guider, and is provided with a recess that is a recess that is close to an end portion on the opposite side of the rotation axis of the louver. The once-through fan comprises one or more dividers and
The air curtain according to claim 1, wherein the distance between the plate plane parallel to the partition plate and passing through the partition plate and the upper end of the airflow guider is 0 to 5 mm. The once-through fan comprises one or more dividers and
The airflow guider
It is provided on the motor side of 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.
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 plane of the first plate. The air curtain according to claim 3, wherein the distance between the upper end of the airflow guider and the plane of the first plate is 0 to 5 mm. The airflow guider
The air curtain according to any one of claims 1 to 4, which is inclined by an angle θ (0 ° <θ <10 °) with respect to a vertical surface 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
The air curtain according to claim 1, wherein at least two air curtains are provided so as to be symmetrical with respect to the central surface passing through the center and perpendicular to the rotation axis.

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