JP2014163630A - Air curtain device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air curtain device having sufficient air shutoff capacity.SOLUTION: An air curtain device includes: a unit 5 that is provided so as to cover an entrance door 6 of a room 3, and has a side door 7 to a side wall 8 on the front side of the entrance door 6; and a plurality of blowers 11, 12 that are respectively provided near the entrance door 6 and side door 7 in the unit 5, blow out air in the lateral direction of the entrance door 6 and side door 7 respectively, and generate a curtain of air stream. In the plurality of blowers 11, 12, the air blow-out directions of the blower 11 provided near the entrance door 6 and the blower 12 near the side door 7 are made in a reverse direction.

Description

  The present invention relates to an air curtain device that is installed at an open doorway of a building and that blocks the flow of air inside and outside the room during air conditioning.

  Conventional air curtain devices are installed near the open doorway of buildings to reduce the load on the air conditioner by suppressing the inflow of outside air into the room at the doorway and the outflow of air during indoor air conditioning. The As an air curtain device, a device that is installed above the entrance and exits and blows air downward to block the inflow and outflow of air at the entrance and exit is widely used (see, for example, Patent Document 1).

  However, in such an air curtain device, after the blown air reaches the floor surface of the entrance / exit, the air flows indoors and outdoors along the floor surface, so that the air-conditioned air in the room flows out to the outside. there were.

Therefore, in order to improve the shut-off performance, there is an air curtain device provided with an air outlet and a suction port, and the air sucked from the suction port is blown out from the outlet by an internal blower (for example, Patent Documents). 2).
The casing of the air curtain device is installed on both sides in the lateral direction of the entrance and exit, the suction port and the air outlet are provided on the opposing surfaces of each housing, and the other air inlet is at the position facing one air outlet A blower outlet is installed in the position which opposes one suction inlet. Thereby, the blown air is circulated across the entrance / exit in opposite directions to obtain the effect of the air curtain.

Japanese Patent Laid-Open No. 5-106898 (Summary) JP 2007-10184 A (summary)

  In the technique described in Patent Document 2 described above, the flow of air flow is opposite to each other on the entrance / exit surface, so that a large speed difference occurs at the boundary, and the flow becomes unstable and turbulent. There is a problem that the ability is reduced.

  The present invention has been made to solve the above-described problems, and an object thereof is to obtain an air curtain device having a sufficient air blocking capability.

  The air curtain device according to the present invention is provided so as to cover an entrance / exit in a room, and has a unit having a communication port on a side wall on the near side of the entrance / exit, and is provided in the unit near the entrance / exit, respectively, And a plurality of blowers for blowing air in the lateral direction of the common port and generating a curtain of air flow, and among the plurality of blowers, provided near the blower and the common port provided near the entrance / exit The air blowing directions of the blower units are opposite to each other.

  According to the present invention, the air blowing directions of the air blower provided near the entrance and the air blower provided near the common port are opposite to each other. An air flow curtain is generated at the mouth, so that the flow of air inside and outside the room can be reliably blocked. The direction of the air flow blown out from each blower is the same in each inlet and outlet, so there is no large speed difference and no turbulence resulting from it occurs. The air flow curtain to be blocked is not disturbed, and the air blocking ability is improved.

The top view which shows schematic structure of the air curtain apparatus which concerns on Embodiment 1 of this invention. The longitudinal cross-sectional view which shows the air curtain apparatus of FIG. 1 seeing from an AA direction. The structural diagram of the air blower used for the air curtain apparatus which concerns on Embodiment 1 of this invention. The top view which shows schematic structure of the air curtain apparatus which concerns on Embodiment 2 of this invention. The top view which shows the modification of the air curtain apparatus which concerns on Embodiment 1, 2 of this invention.

  Embodiments of an air curtain device according to the present invention will be described below in detail with reference to the drawings. In addition, this invention is not limited by embodiment shown below.

Embodiment 1 FIG.
FIG. 1 is a plan view showing a schematic configuration of an air curtain device according to Embodiment 1 of the present invention, FIG. 2 is a longitudinal sectional view showing the air curtain device of FIG. 1 from the AA direction, and FIG. It is a structural diagram of the air blower used for the air curtain apparatus according to the first embodiment.

  As shown in FIGS. 1 and 2, the air curtain device 1 according to Embodiment 1 is provided on the side wall 3 a of the room 3 of the building 2 so as to cover the entrance / exit 6, and is commonly used for the side wall 8 on the near side of the entrance / exit 6. A unit 5 having a mouth 7 and two air blowers 11 and 12 provided in the unit 5 near the entrance / exit 6 and the common port 7 are provided.

  The unit 5 is formed in, for example, a box shape with an opening facing the side wall 8. This unit 5 is installed so that the opening surface is covered with the side wall 3a of the room 3, and a space 5a is formed inside. The common port 7 of the unit 5 is provided at a position facing the entrance 6 of the room 3. In the first embodiment, the unit 5 is installed outside the room 4. However, the present invention is not limited to this, and the unit 5 may be installed in the room 3.

  The blower device 11 is installed along the side wall 3a on the left side surface of the entrance 6 when viewed from the outdoor 4 side, and the blower device 12 is disposed on the side wall 8 on the left side surface of the access port 7 when viewed from the indoor 3 side. It is installed along. Moreover, the blower outlet 15 of the air blower 11 is orient | assigned to the entrance / exit 6 side, as shown in FIG. 2, and the blower outlet 15 of the air blower 12 is orient | assigned to the common port 7 side. That is, the air blower 11 and the air blower 12 are installed so that the air blowing directions are opposite to each other.

  As shown in FIG. 3, the blowers 11 and 12 include a rectangular parallelepiped casing 13 that extends in the vertical direction, the above-described air outlet 15, a suction port 14, a motor 16 having an axial impeller 17, and a motor The motor fixing foot 18 is configured to fix the 16 inside the housing 13. The blower outlet 15 is formed in a pair of strips extending in the vertical direction along the shape of the housing 13, and the suction port 14 is provided on a surface facing the blower outlet 15, and is approximately the same size as the surface. Is formed.

  For example, a plurality of motors 16 are arranged in the vertical direction of the housing 13. By driving the motor 16, the axial flow impeller 17 rotates, and air flows into the housing 13 from the suction port 14 by its action. The air that has flowed into the housing 13 is increased in pressure and flow velocity by the axial flow impeller 17 and flows out from the air outlet 15 to the outside of the housing 13 as a belt-like airflow.

Operation | movement of the air curtain apparatus 1 of Embodiment 1 comprised as mentioned above is demonstrated.
The two air blowers 11 and 12 are driven substantially simultaneously. At this time, the belt-like air flow blown from the blower outlet 15 of the blower 11 crosses while generating a curtain of airflow in the lateral direction of the inlet / outlet 6. Then, the air flow flows along the side wall 3 a of the room 3 and the side wall 8 b of the unit 5 and is sucked from the suction port 14 by the blower 12.

  The sucked air is blown out from the blower outlet 15 of the blower device 12 in a belt-like airflow state and crosses while generating a curtain of airflow in the lateral direction of the service port 7. The air flow flows along the side wall 8 a of the unit 5 and the side wall 3 a of the room 3, and is sucked from the suction port 14 by the blower 11. By this air flow, a circulating flow 20 is generated in the space 5 a of the unit 5 with the vertical direction as an axis with respect to the floor surface of the unit 5.

  As described above, according to the first embodiment, the air in the unit 5 is circulated, so that the air exceeding the air volume of the air flow generated by the blowers 11 and 12 moves in the unit 5. As a result, an air flow curtain is generated at the entrance / exit 6 of the room 3 and the communication port 7 of the unit 5, and the flow of air inside and outside the room can be reliably blocked.

  In addition, since the direction of the air flow blown out from each of the blowers 11 and 12 is the same in each of the entrances 6 and the entrances 7, there is no large speed difference, and turbulence caused by the directions does not occur. The curtain of the air flow that shuts off the entrance 6 and the communication port 7 is not disturbed, and the air shutoff capability is improved.

  In addition, when a person, a carriage, or the like passes through the doorway 6 and the common port 7, only one of the airflows blown from the blowers 11 and 12 is blocked, and the other airflow is blocked. Therefore, it is possible to suppress a decrease in the shut-off capability due to the air flow when a person or a cart passes.

Embodiment 2. FIG.
FIG. 4 is a plan view showing a schematic configuration of an air curtain device according to Embodiment 2 of the present invention. In FIG. 4, the same reference numerals are given to the same or corresponding parts as in the first embodiment.
As shown in FIG. 4, the air curtain device 1 according to the second embodiment is provided on the side wall 3a of the room 3 of the building 2 so as to cover the two entrances 6a and 6b, and the front side of the two entrances 6a and 6b. Unit 5 having two communication ports 7a and 7b on the side wall 8 thereof, and four blowers 11a, 11b, 12a and 12b provided in the unit 5 near the entrances 6a and 6b and the communication ports 7a and 7b, respectively. And.

  Similarly to the above, the unit 5 is formed in a box shape in which a surface facing the side wall 8 is opened. This unit 5 is installed so that the opening surface is covered with the side wall 3a of the room 3, and a space 5a is formed inside. The communication ports 7 a and 7 b of the unit 5 are provided at positions facing the entrances 6 a and 6 b of the room 3. In the second embodiment, the unit 5 is installed outside the room 4. However, the present invention is not limited to this, and the unit 5 may be installed in the room 3.

  The blower devices 11a and 11b are installed along the side walls 3a on the left side surfaces of the respective entrances 6a and 6b when viewed from the outdoor side 4, and the blower devices 12a and 12b are commonly used when viewed from the indoor side 3 side. It is installed along each side wall 8 on the left side surface of the mouths 7a and 7b. Moreover, each blower outlet 15 of the air blowers 11a and 11b is orient | assigned to the entrance / exit 6a and 6b side, respectively, Each blower outlet 15 of the air blower 12a and 12b is orient | assigned to the common port 7a and 7b side, respectively. . That is, the air blowers 11a and 11b and the air blowers 12a and 12b are installed so that the air blowing directions are opposite to each other. In addition, since the structure of four air blower 11a, 11b, 12a, 12b is the same as that of Embodiment 1, description is abbreviate | omitted.

The operation of the air curtain device 1 of the second embodiment configured as described above will be described.
The four blowers 11a, 11b, 12a, and 12b are driven substantially simultaneously. At this time, the belt-like air flow blown from the blower outlet 15 of the blower 11a crosses while generating a curtain of airflow in the lateral direction of the inlet / outlet 6a. The airflow flows along the side wall 3a of the room 3 and is sucked from the suction port 14 by the blower 11b. The sucked air is blown out from the blowout port 15 of the blower 11b in a belt-like airflow state, and crosses while generating a curtain of airflow in the lateral direction of the inlet / outlet 6b. The air flow across the entrance / exit 6b flows along the side wall 3a of the room 3 and the side wall 8b of the unit 5, and is sucked from the suction port 14 by the blower 12a.

  The sucked air is blown out from the blower outlet 15 of the blower 12a in the form of a strip-like airflow, and crosses while generating a curtain of airflow in the lateral direction of the service port 7b. Then, the air flow flows along the side wall 8 of the unit 5 and is sucked from the suction port 14 by the blower 12b. The sucked air is blown out from the blower outlet 15 of the blower 12b in the form of a belt-like airflow, and crosses while generating a curtain of airflow in the lateral direction of the service port 7a. The air flow flows along the side wall 8a of the unit 5 and the side wall 3a of the room 3, and is sucked from the suction port 14 by the blower 11a. Due to this air flow, a circulating flow 20 is generated in the space 5 a of the unit 5 with the axis perpendicular to the floor surface of the unit 5.

  As described above, in the second embodiment, as in the first embodiment, air exceeding the air volume of the air flow generated by the four blowers 11a, 11b, 12a, and 12b moves in the unit 5. . As a result, air flow curtains are generated at the entrances 6a and 6b of the room 3 and the communication ports 7a and 7b of the unit 5, and the flow of air inside and outside the room can be reliably blocked.

  In addition, the direction of the air flow blown out from each of the blowers 11a, 11b, 12a, 12b is the same in each of the entrances 6a, 6b and the communication ports 7a, 7b, so there is no significant speed difference. Since the turbulence resulting from this does not occur, the curtain of the air flow that blocks the entrances 6a, 6b and the communication ports 7a, 7b is not disturbed, and the air blocking capability is improved.

  In addition, when a person or a trolley passes through the entrances 6a and 6b and the common ports 7a and 7b, only one of the air flows blown out from the blowers 11a, 11b, 12a, and 12b is blocked. Since the other air flow is not obstructed, it is possible to suppress a decrease in the interruption capability due to the air flow when a person or a carriage passes.

  In the first and second embodiments, the left and right side walls 8a and 8b of the unit 5 are formed in a square shape, but the left and right side walls 8a and 8b of the unit 5 are connected to each other as shown in FIG. It may be a curved surface recessed in the opposite direction. In this case, it is possible to suppress the secondary flow from being generated at the corners of the circulation flow 20, to obtain a strong circulation flow 20, and to improve the blocking effect by the air flow. FIG. 5 is a plan view showing a modification of the air curtain device according to Embodiments 1 and 2 of the present invention.

  DESCRIPTION OF SYMBOLS 1 Air curtain apparatus, 2 Building, 3 Interior, 3a Side wall, 4 Outside, 5 Unit, 6, 6a, 6b Entrance / exit, 7, 7a, 7b Common entrance, 8, 8a, 8b Unit side wall, 11, 11a, 11b Blower, 12, 12a, 12b Blower, 13 Housing, 14 Suction port, 15 Air outlet, 16 Motor, 17 Axial impeller, 18 Motor fixed foot, 20 Circulating flow.

Claims (3)

A unit that is provided so as to cover an indoor entrance, and has a communication port on a side wall on the near side of the entrance;
A plurality of air blowers that are provided in the unit near the entrance and the entrance, respectively, blow out air in the lateral direction of the entrance and the entrance, and generate a curtain of airflow,
Of the plurality of air blowers, the air blowing directions of the air blower provided near the entrance and the air blower provided near the common port are opposite to each other. Curtain device.   The plurality of blowers include a rectangular housing formed to extend in the vertical direction, a suction port provided on one surface of the housing, and an air outlet provided on a surface facing the suction port. The air curtain device according to claim 1, wherein the air curtain device is provided.   The air curtain device according to claim 1 or 2, wherein side walls on both left and right sides of the unit are configured by curved surfaces that are recessed in opposite directions.

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