JP2007163054A - Insect control air curtain system, and air flow blowing method for air curtain system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To secure a wide passage space in the doorway of a sanitary-controlled room space by reducing the size of an insect control air curtain system, including casings installed in both side surfaces of the passage space. <P>SOLUTION: The air curtain system is so constructed that the side casings, installed in both side surfaces of a passage space in the doorway of a room space each have a blower for force-feeding forced air from a nozzle, an air passage and a drive means for driving the blower, to blow an air curtain current across the passage space, and that air curtain current outlets of the side casings are oriented so as to cause the air curtains blown away from the room from the air flow nozzles to cross each other in the passage. The use of turbofans as the blowers and DC brushless motors as the blower drive means reduces the footprint of the casings, saves energy and facilitates speed control. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an insect curtain device for preventing insects from entering an indoor space that maintains a sanitary environment in pharmaceutical and food-related factories and the like, and a method for blowing out the air.

  An air shower device has been installed at the entrance to the indoor space, mainly as an environmental conservation measure in the indoor space under hygienic management. Furthermore, an insect curtain air curtain device has been developed in food manufacturers and the like for the purpose of preventing contamination by foreign substances such as insects (see Patent Document 1).

As shown in FIG. 5, the apparatus includes fans 55a and 55b and motors 56a for driving the fans in casings 54a and 54b provided on both side walls of the passage space 52 at the entrance and exit to the hygienic indoor space 51. 56b, primary and secondary filters 57a, 57b, 58a, and 58b are provided, suction ports 59a and 59b, and air outlets 60a and 60b are provided. The fans 55a and 55b are rotated by driving the motors 56a and 56b. Thus, the outside air sucked from the suction ports 59a, 59b is cleaned by the primary and secondary filters 57a, 57b, 58a, 58b, and discharged to the passage space 52 through the positive pressure portions 61a, 61b and the outlets 60a, 60b. The discharged air is blown out from the casings 54a and 54b on both sides in the passage space 52 because the direction of the air outlets 60a and 60b is directed to the outdoor direction at an angle with respect to the indoor space 51. Intersect and collide.
At this time, the air blown from the blowout opening 60a is faster than the air blown out from the blowout opening 60b, so that it pushes over the air blown out from the blowout opening 60b as shown in FIG.

  In the above, the fan types used on the high speed side and the low speed side are different, and since the sirocco type fan is used on the low speed side, a positive pressure case is required to make the blower air speed uniform and the blower air speed uniform. Therefore, downsizing was difficult. In addition, since the left and right blowers are different, it is impossible to make the can-making structure common.

When the left and right blowers are different from each other, the airflow shown in FIG. 5 cannot be reversed. Depending on the situation of the entrance / exit of the room where the air curtain device is to be installed, depending on the wind direction of the day, there may be cases where a satisfactory insect repellent effect cannot be exhibited unless the strength of the left and right blowing airflows is reversed.
Japanese Patent No. 2920759

  In view of the above points, the present invention provides a curtain space device for insect protection including casings provided on both side surfaces of a passage space provided at a doorway to a hygienic indoor space. The passage space can be widened.

  By arbitrarily reversing the strength and / or direction of the main flow of the air curtain that blows into the passage space provided at the entrance to the indoor space, it can be installed with the optimal air flow according to the site situation, and changes in the season and situation The corresponding adjustment is possible.

  Insects enter from the upper part of the air curtain flow at the position where the air curtain flow from both sides intersects when the air curtain flow toward the outdoor with a predetermined angle from both sides is blown toward the passage space. In order to prevent this, a coral is provided in the passage space so as to cover the upper part of the intersection position.

  When the seat shutter provided at the entrance to the indoor space is closed, insects adhere to the seat shutter and insects enter the room due to the co-under effect under the power saving state that weakens the flow of air curtain airflow that blows out toward the passage space. The purpose is to prevent the entry of.

According to the first aspect of the present invention, the air curtain airflow that crosses the passage space is blown into the side casings provided on both side surfaces of the passage space provided at the entrance to the indoor space. An air curtain that blows out the air curtain airflow outlet of each side casing from the airflow outlet toward the outdoor side, and includes a blower and an air flow path that pumps compressed air from the outlet, and a drive unit that drives the blower. In the air curtain device provided so as to intersect with each other in the passage, by using a turbo fan for the blower and a DC braunless motor for the blower driving means, the casing installation area is reduced, energy saving, and Easy speed control.
According to the second aspect of the present invention, the air curtain airflow crossing the passage space is blown into the side casings provided on both side surfaces of the passage space provided at the entrance to the indoor space. An air curtain that blows out the air curtain airflow outlet of each side casing from the airflow outlet toward the outdoor side, and includes a blower and an air flow path that pumps compressed air from the outlet, and a drive unit that drives the blower. In the air curtain device provided so as to intersect with each other in the passage, a high-speed exhaust outlet is provided in one of the side casings, and a low-speed exhaust outlet is provided in the other, and these outlets are provided. It was made possible to attach and remove, and the position could be exchanged.
In invention of Claim 3, the upper part of the position where the air curtain airflow which blows off toward the outdoor side from the air curtain airflow outlet provided in the side casing provided in each of the both sides | surfaces of a passage space cross | intersects 2. An insect curtain apparatus according to claim 1, wherein a wing is provided in the passage space so as to prevent insects from entering the air curtain airflow blown from both sides of the passage space.
In the invention according to claim 4, the air curtain airflow crossing the passage space is formed in the side casings provided on both side surfaces of the passage space provided at the entrance to the indoor space having the seat shutter. In an air curtain that provides an air outlet, blows out an air curtain airflow at a predetermined angle from the air outlet toward the outdoor side, intersects the air curtain air current blown out from both sides of the passage space, and prevents insects from entering the room, When the seat shutter is closed, the air curtain is blown out from one of the outlets at a slight wind speed, and the air curtain airflow is generated in parallel with the seat shutter by the co-under effect, thereby preventing insects from entering and / or sticking to the seat shutter. An air current blowing method for an air curtain device.

The insect repellent air curtain device of the present invention has the following effects.
To reduce the casing installation area by using a turbo fan for the air curtain airflow blower provided in each side of the passage space provided at the entrance to the indoor space. For this reason, the area for carrying materials and other items into the room can be expanded. Further, since the casing installation area is small even in a narrow space, it is possible to install with a large entrance / exit interval.

  Speed control is facilitated by using a DC brushless motor as the blower drive means. Therefore, a brushless motor is used as a drive means for a pair of air curtain airflow blowing fans provided opposite to both sides of the passage space, and which side is set to high speed blowing or low speed blowing, depending on the actual situation In addition, it was possible to form an air stream with a more stable insect repellent effect.

  The strength of the air curtain airflow discharged to the outdoor space with an angle from each of the air curtain airflow outlets provided on the casing provided opposite to both sides of the passage space can be appropriately selected. It is also possible to reverse the strength if necessary.

  Cover the passage space so that it covers the upper part of the intersecting position of the air curtain airflow blown out from the air curtain airflow blowout port provided in the side casing provided on each side surface of the passage space. Since it is provided, it is possible to prevent insects from entering from the air pocket that can be formed at the position where the airflow intersects.

Air curtain air current is blown out from the side casings provided on both side surfaces of the passage space of the entrance / exit to the indoor space having the seat shutter toward the outdoor side at a predetermined angle, the air current is crossed, and insects enter the room The air curtain airflow that prevents the intrusion of air is blown out at a slight wind speed even when the seat shutter is closed, so that the air curtain flows along the seat shutter due to the co-under effect, and insects adhere to the seat shutter when the seat shutter is closed. It is possible to prevent insects from falling from the seat shutter and entering the room when the seat shutter is opened.
Since a direct current brushless motor is used for the fan motor, the power consumption is low, so the operating cost is not particularly increased.

  The air curtain device 1 of the present invention is installed at the entrance / exit 3 of the room 2 and is provided on the side casings 4a, 4b provided on both sides of the entrance / exit 3 and the side casings 4a, 4b located above the entrance / exit 3. It consists of a ceiling part 4c, and a flange 17 projects from the ceiling part 4c on the outdoor 16 side. The side casings 4 a and 4 b, the ceiling part 4 c and the floor surface 5 constitute a passage space 6 in front of the entrance / exit 3.

The side casings 4a and 4b are symmetrical and basically have the same structure. Both the casing 4a and 4b have a turbo fan 8, a prefilter 9 and an air using a DC brushless motor 7 for blowing out air curtain airflow. It has a low-speed nozzle 10 or a high-speed nozzle 11 for curtain air current ejection.
In the illustrated embodiment, the low speed nozzle 10 is provided in the side casing 4a, and the high speed nozzle 11 is provided in the side casing 4b.

The low-speed nozzle 10 is provided following the low-speed duct 12 that sends the compressed air of the turbofan 8a, and a slit-like air outlet formed by juxtaposing a plurality of plate-like bodies 10a at intervals is about 15 ° in the outdoor direction. It has an angle and is provided continuously in the vertical direction. The high-speed nozzle 11 is provided subsequent to the high-speed duct 13 for sending the compressed air of the turbo fan 8b, and is directed to the tangential direction of the cylindrical body on one side of the cylindrical body 11b that can pivot about the shaft 11a as shown in FIG. The cylindrical body 11b is capable of changing the direction of the outlet 11c by means as appropriate. A hollow packing 11d with good airtightness is attached in contact with the rotating portion of the cylindrical body 11b to prevent air leakage.
The low-speed nozzle 10 and the high-speed nozzle 11 can be removed at the connection site with the low-speed duct 12 or the high-speed duct 13 and their positions can be changed.
A lath net 14 is provided on the front side of the side casings 4a and 4b, and outside air is sucked from these portions.

  Outside air enters the side casings 4a and 4b through the lath knitting 14 by the rotation of the turbofans 8a and 8b, is cleaned by the prefilter 9, passes through the low-pressure duct 12 or the high-pressure duct 13, and the low-speed nozzle 10 or the high-speed nozzle 11 To the passage space 6 as air curtain airflows Aa and Ab. The air curtain airflow Aa ejected from the low speed nozzle 10 into the passage space 6 is in a direction crossing the passage space 6 and has a discharge angle of about 15 ° toward the outdoor side. The air curtain airflow Ab discharged to the direction 6 crosses the passage space 6, and is parallel to the width direction of the entrance / exit 3 or is in the range of 0 to 45 ° (optimum 25 ° for 2 m width) toward the outdoor side. It can be selected as appropriate. The blowing angle is preferably set so as to form a diagonal line of the passage space 6 in a plan view, but a sheet shutter 15 (shown in FIG. 1C) is provided on the indoor 2 side of the doorway 3 to be described later, and insects attached thereto For the purpose of preventing the action, the high-speed nozzle and the low-speed nozzle move the airflow along the sheet shutter by the Coanda effect without moving and displacing the blowing angle in order to prevent insects adhering to the sheet shutter. Air is blown out only on the low speed side.

  The fan 8 is a space-saving type and adopts an outer rotor type DC brushless motor with a motor part incorporated in the central part of the runner, so that the blower becomes thinner and the body case can be made smaller. .

  The direct current brushless motor is easy to adjust the air volume by the volume, and it is possible to share the high-speed and low-speed blowers and the main body case. However, the blower does not have a casing, and it is necessary to consider the distribution and safety of the blown airflow. One way to improve the distribution of the blown airflow is to install R-type wind direction plates at the four corners of the runner periphery. Turbulent flow generated at the corner of the main body case is reduced (not shown). In addition, a duct with a net is provided in the blowout part of the fan to improve the distribution and safety of the blown airflow (not shown).

In the device of the present invention, a positive pressure case is not used in order to save space. The air blown from the blower passes through the blow nozzle as it is, so there is little pressure loss, but it is difficult to make uniform blown air, especially when air is blown, inertia force is generated, and the airflow blown down from top to bottom is evenly distributed horizontally. The wind speed distribution in the vertical direction is made uniform by providing wind direction plates in the high-speed and low-speed ducts.
As a result, the outer diameter of the side casings 4a and 4b is 500 mm × 500 mm, which is smaller than the 600 mm × 850 mm of the conventional apparatus, and the installation area is about one-half.

Next, the operation will be described based on the above embodiment.
The outdoor air passes through the lath net 14 and enters the side casings 4a and 4b by the rotation of the turbofans 8a and 8b of the side casings 4a and 4b, and is filtered by the prefilter 9. The air sucked into the side casing 4a is blown out from the turbo fan 8a to the low speed duct 12, and is discharged from the low speed nozzle 10 as an air curtain airflow Aa. At this time, the direction in which the airflow Aa flows out has an angle of about 15 ° toward the outdoor direction. On the other hand, the air sucked into the side casing 4b is discharged as an air curtain airflow Ab from the high-speed nozzle 11 by the turbo fan 8b as described above. At this time, the direction in which the airflow Ab flows out is an angle of 25 ° or less toward the outdoor direction, and the air curtain airflow Ab is stronger than the other Aa in consideration of the air curtain airflow Aa and the passage space. The blowing angle is set so as to intersect at a point P (shown in FIG. 4) that is displaced from the center of 6 to the outlet side (10 side in the illustrated example) on the low wind speed side. Then, as shown in FIG. 4, both air curtain airflows merge at point P and are discharged to the outdoor 16 as they are.

  When the intersection P of the flow of the two air curtain airflows Aa and Ab is viewed from above, the area is the same as when the area is opened upward, and insects can easily enter the passage space 6 from the outside. Therefore, the junction P is positioned below the flange portion 17 that protrudes from the ceiling portion 4a spanned between the side casings 4a and 4b.

  When there is no entry or exit from the room 2 such as at night, the sheet shutter 15 is lowered at the entrance 3. At that time, only the low speed nozzle 12 of the side casing 4a is blown out. At this time, the air curtain is blown to the surface of the sheet shutter by the Counder effect, and a negative pressure is generated between the sheet shutter 15 and the air curtain, and the flying insect cannot enter even if the air curtain has a low wind speed. Even if the curtain is broken, the number of insects attached to the sheet shutter 15 decreases due to the negative pressure effect. Since the fan motor is always rotating at this time, the time required for the fan motor to reach the normal number of rotations when the seat shutter is opened can be minimized, the inrush current can be reduced, and the motor life can be extended.

The apparatus of this invention is shown, A is a front view, B is a BB line sectional view in A, C is a CC line sectional view in A. A is a side casing sectional view on the low speed side, and B is a side casing sectional view on the high speed side. FIG. Explanatory drawing which shows the relationship between a side part casing and a collar. The top view which shows the air curtain airflow between side part casings.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Air curtain apparatus 2 Room 3 Entrance / exit 4a, 4b Side casing 4c Ceiling part 5 Floor surface 6 Passage space 7 DC brushless motor 8 Turbo fan 9 Prefilter 10 Low speed nozzle 11 High speed nozzle 12 Low speed duct 13 High speed duct 14 Lass net 15 Sheet Shutter 16 Outdoor 17 庇

Claims (4)

  A blower for blowing air curtain airflow across the passage space into the side casings provided on both side surfaces of the passage space provided at the entrance to the indoor space, and an air flow path for sending compressed air from the outlet And a driving means for driving the blower, and the air curtains that blow out the air curtain airflow outlets of the respective side casings from the airflow outlet toward the outdoor side are in a direction crossing each other in the passage. In the installed air curtain device, a turbo fan is used for the blower and a direct current braunless motor is used for the blower driving means, thereby reducing the casing installation area, saving energy, and facilitating speed control. Insect-proof air curtain device.   A blower for blowing air curtain airflow across the passage space into the side casings provided on both side surfaces of the passage space provided at the entrance to the indoor space, and an air flow path for sending compressed air from the outlet And a driving means for driving the blower, and the air curtains that blow out the air curtain airflow outlets of the respective side casings from the airflow outlet toward the outdoor side are in a direction crossing each other in the passage. In the air curtain device provided, the side casing is provided with a high-speed exhaust outlet on one side and a low-speed exhaust outlet on the other side, and these outlets can be attached and removed to exchange positions. The air curtain device for insect repellent according to claim 1, which is made possible.   A corrugation is provided in the passage space so as to cover the upper part of the intersecting position of the air curtain airflow blown out from the air curtain airflow outlet provided in the side casing provided on each side surface of the passage space toward the outdoor side. The insect curtain apparatus according to claim 1, wherein insects are prevented from entering the indoor side of the air curtain airflow blown from both sides of the passage space.   Air curtain airflow outlets that cross the passage space are provided in the side casings provided on both side surfaces of the passage space provided at the entrance to the indoor space having the seat shutter, and the outside of the air outlet from the outlet In an air curtain that blows out an air curtain airflow at a predetermined angle toward the door and crosses the air curtain airflow blown out from both sides of the passage space to prevent insects from entering the room, air is discharged from one of the air outlets when the seat shutter is closed. An air current blowing method for an air curtain device, characterized in that an air curtain air current is generated in parallel with a sheet shutter by blowing out a curtain at a slight wind speed and along a sheet shutter to prevent insects from entering and / or adhering to the sheet shutter.

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