JP2011226687A - Air curtain apparatus for insect proofing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a one-side blowout type insect proofing air curtain in which an air curtain airflow flowing to an opening flows only in one direction for reducing the number of the facilities of an air suction/blowout device for blowing out the air curtain airflow, and for preventing the deterioration of insect proofing effects around the outlet of the air curtain airflow of the air suction/blowout device which blows out the air curtain airflow.SOLUTION: The air suction/blowout device having an outside air suction port for sucking outside air and an air curtain airflow blowout nozzle laterally crossing a passage space configuring the entrance/exist of an indoor space is arranged at the side of the passage space where the blowout nozzle is arranged while a blowout angle is maintained so that the blown-out airflow flows toward an exterior space side at an appropriate blowout angle, and a baffle board formed so as to abut against the air curtain airflow at an acute angle for making the air curtain airflow escape to the exterior space side of the passage space is formed at the other side of the passage space. Thus, it is possible to satisfactorily achieve the capturing of an insect by increasing the suction speed of the outside air of the outside air suction port of the air suction/blowout device.

Description

  INDUSTRIAL APPLICABILITY The present invention is used in an area where a sanitary environment such as food-related or pharmaceutical-related needs to be maintained or an area where a dust-free environment such as a precision instrument device should be maintained to prevent the entry of pests into the area. The present invention relates to an insect curtain.

  In the past, especially in the food manufacturing industry, which does not like the inclusion of foreign matter in the product, a pest entry blocking member at the entrance / exit opening of the work space in order to prevent the entry of pests from the product carry-in / out port in the work space Is provided. One of them is an air curtain. The air curtain is configured as follows. That is, an air curtain suction / blowing device is arranged on both side walls of the passage space of the work space entrance / exit, and an air curtain air flow blowing nozzle for blowing an air curtain air flow across the passage space in the device in the lateral direction; In addition to providing an air flow outlet for blowing out the air curtain airflow so as to intersect the air curtain airflow, the suction blower device is provided with a suction port to suck the jet air blown out from the opposing wall surface (Patent Document) 1).

  In addition, an air curtain airflow blowing nozzle that crosses the passage space is provided in the side casing provided on both side surfaces of the passage space in the same manner as described above, and the air curtain airflow is blown at a predetermined angle from the blowing nozzle toward the outdoor side. Also known is an air curtain device in which the air curtain airflow blown from both sides of the passage space intersects the lower part of the cocoon part protruding from the ceiling part of the passage to prevent insects from entering the room by the cocoon part. (Patent Document 2).

  However, as shown in FIG. 1, these devices all use the pressure airflow blown from the air curtain airflow blowout nozzles B and C of the suction blowout devices D and E provided on both side walls of the passage space A. Therefore, the air suction blowers D and E are required on both sides of the passage space A, so that the wind speed from the blower nozzle C intersects in the passage space A as a result. It was a situation that had to be doubled.

  Further, in the blowout type insect-repellent air curtain, the blown air is held at a predetermined angle on the outdoor side so as to cross the passage space A from the air curtain airflow F blowing nozzle provided in the side portion of the passage space A. Although it is blowing out, in the vicinity of the blowing nozzle B of the air suction blowing device D, the flow of the blown air curtain air flow F is not yet widened, and the width of the air curtain air flow F is small. There was a risk of breaking through the flow and entering the work space.

Japanese Patent No. 2920759 Japanese Patent No. 4314374

  The present invention relates to an air curtain that allows air current to flow across the opening and close the opening in order to prevent pests and the like from entering the room such as the work space from the opening such as the passage space. Air curtain airflow of the air suction device that blows out the air curtain airflow while reducing the equipment of the air suction airflow device that blows out the air curtain airflow In order to eliminate the deterioration of the insect repellent effect in the portion of the air curtain airflow blowing width near the blow nozzle of the air, the insect of the portion where the flow width of the air curtain airflow is small is prevented from passing through the airflow, In addition, the trapping of insects is improved by increasing the external air suction speed of the outdoor air suction port of the air suction blowout device so that the insects in the part can be captured. It is.

The invention according to claim 1 is an air curtain device, wherein an outdoor air suction port for sucking outdoor air and air crossing the passage space in the lateral direction are formed in a side portion of the passage space constituting an entrance to the indoor space. An air suction / blowout device having a curtain airflow outlet is provided, and the airflow is arranged at an appropriate airflow angle so as to flow toward the outdoor side with an appropriate airflow angle. A baffle board that abuts the air curtain airflow at an acute angle and releases the air curtain airflow to the outside of the passage space is provided on the side portion.
The invention of claim 2 is an air curtain device, wherein the air curtain airflow is blown at an angle of 20 to 25 ° on the outdoor side.
The invention according to claim 3 is an air curtain device, wherein the air curtain airflow blowing nozzle has a width of 30 to 80 mm, preferably 50 mm.
The invention according to claim 4 is an air curtain device, in which the outdoor air suction port of the air suction / blowout device is displaced toward the outdoor side.

  The air curtain device of the present invention is provided with an air suction / blowout device on one side of the passage space, a baffle board on the other side, and the air curtain airflow from the air suction / blowout device is applied to the baffle board at an acute angle so that the downstream portion of the air curtain airflow In this case, the density of the air curtain airflow becomes high, and it is possible to satisfactorily eliminate the insects trying to enter.

  By shifting the outdoor air suction port of the air suction / blowout device toward the outdoor side, insects located near the blowout port are easily captured and sucked. In addition, since the flow velocity of the suction airflow passing through the suction port can be increased by narrowing the suction port, it is easy to capture insects near the air curtain airflow outlet that is difficult to capture.

The cross-sectional top view of the conventional double blowing insect repellent air curtain. The cross-sectional top view of the single blow type insect repellent air curtain of this invention.

Next, an embodiment of the air curtain device 1 according to the present invention will be described with reference to the drawings.
The air curtain device 1 is provided with a pair of an air suction / blowing device 4 and a baffle boat 5 on both sides of a passage space 3 constituting an entrance to the indoor space 2. The air suction / blowout device 4 forms a box and is provided on one side of the passage space 3, and has a filter 6, a fan 7, an air curtain airflow blowing nozzle 8, and the like, and faces the passage space 3 of the box. The air curtain airflow blowing nozzle 8 is located at the indoor space side end of the box side surface 9 and is positioned at the other end of the outdoor space side to cut the corner of the box and open obliquely with respect to the passage space 3 The outdoor air inlet 10 is provided in the room.

As the fan 7 rotates, the outside air in the passage space 3 on the outdoor space 12 side is sucked into the air suction / blowout device 4 from the outdoor air suction port 10, and insects, dust and the like are separated by the filter 6 and the air curtain airflow blowout nozzle 8. Is blown out into the passage space 3 as a curtain airflow 11.
As described above, the device of the present invention is a single-blow type air curtain in which the air suction / blow-out device 4 is provided only on one side of the passage space 3, but the single-blow type insect-proof air curtain provides the same insect-repellent performance as the double-blow type. In order to maintain this, the blowing nozzle width is increased to widen the air current injection range (plan view), thereby making it difficult for the flying insects to cross the wide air current flow. There are ways to increase performance. However, if the spraying range is too wide, the air current enters the indoor space side and conversely causes a decrease in insect repellent performance. In view of this, various optimum nozzle widths and nozzle angles that increase the insect repellent effect are selected, and the nozzle width is preferably 30 to 80 mm, preferably 50 mm, and the nozzle angle is 20 to 25 degrees depending on the nozzle angle and installation space dimensions.
Since the air curtain airflow 11 blown out at the nozzle angle leaves the passage space 3 and deviates in the direction of the outdoor space 12, insects enter from the side surface. In order to prevent this, the baffle board 5 that faces the air suction / blowout device 4 and sandwiches the passage space 3 is provided when the air curtain airflow 11 blown from the air curtain airflow blowout nozzle 8 reaches the baffle board 5. The baffle board 5 and the air curtain airflow 11 are installed so as to maintain such an angle that they intersect at an acute angle θ.
The baffle board 5 may be either a triangular cross section or a single plate-like body as long as the air curtain airflow can escape in the direction of the outdoor space 12 of the passage space 3, and the side of the baffle board 5 due to the presence of the plate-like body. Prevents insects from entering the area.

  The air curtain air flow 11 blown out from the air curtain air flow blowing nozzle 8 constitutes an air flow having a width substantially equal to the width of the air curtain air flow blowing nozzle 8 immediately after blowing, but gradually increases its width and crosses the passage space 3. The width of the roller diffuses, a part of it abuts against the baffle boat 5 and the other flows away into the outdoor space 12. Insects often invade from outside the room across the air curtain airflow 11 above, but the intrusion is from an area with a small airflow width near the air curtain airflow blowing nozzle 8 where the air curtain airflow 11 has a small flow width. Is often.

  The insect-repelling effect of the insect-repellent air curtain is higher at a position 1.4 to 2 m away from the air curtain airflow blowing nozzle than in the vicinity of the blowing nozzle. This is because the blown air curtain air current spreads to increase the air current width and make it difficult for insects to enter. Therefore, in order to increase the overall insect repellent performance, it is only necessary to increase the insect repellent performance in the vicinity of the blowing nozzle. Therefore, in order to efficiently capture the insects gathered near the opening of the suction port 10 of the air suction blowing device 4 and enhance the insect-proof effect, the box corner is cut diagonally at the tip of the side surface 9 of the air suction blowing device 4. The air inlet 10 is provided with the air inlet 10 facing the outdoor space 12, and the air inlet 10 further increases the air intake speed by reducing the opening size. For this reason, insects flying from the outdoor space 12 and staying in the vicinity of the air curtain airflow blowing nozzle 8 are easily sucked into the suction port 10 to compensate for the capture rate near the blowing nozzle 8.

When the efficiency test result in which the sponge ball was introduced into the air curtain air flow in the single blow type device of the present invention in which the air curtain air flow blowing nozzle was installed on one side of the passage space 3 and the baffle board was installed on the other side, the double blow type sponge ball was seen. The effect was 90%, but it was 94% in the case of the single blow type of the present invention, and the effect was improved by the apparatus of the present invention.
That is, in the case of the single blow type, the efficiency increases as the nozzle angle increases and the blow speed increases.

  In the description of the above embodiment, an example in which an air suction / blowing device is arranged on one side of the passage space and a baffle board is arranged on the other side has been described. It is also possible to arrange the device so as to be a double-blowing device, and to place an appropriate baffle board between the air suction / blowing devices on both sides so that it can cope with a wide space.

1 Air curtain device
2 indoor space
3 passage space
4 Air Suction Blowing Device 5 Baffle Board 6 Filter 7 Fan 8 Air Curtain Airflow Blowing Nozzle 9 Box Side 10 Outdoor Air Suction Port 11 Air Curtain Airflow 12 Outdoor Space A Passage Space B, C Air Curtain Airflow Blowout Nozzle D, E Air Suction Blowout device F Air curtain airflow

Claims (4)

  An air suction blowout device having an outdoor air suction port for sucking outdoor air and an air curtain airflow blowout nozzle that crosses the passage space in the lateral direction is provided at a side portion of the passage space constituting the entrance to the indoor space, The blowing nozzle is arranged with a blowing angle at which the blown airflow has an appropriate blowing angle and flows toward the outdoor space, and forms an acute angle with the air curtain airflow at the other side of the passage space. An air curtain device comprising a baffle board that abuts and releases an air curtain airflow to the outdoor space side of the passage space.   The air curtain device according to claim 1, wherein an air curtain airflow angle is set to 20 to 25 degrees toward the outdoor space.   2. The air curtain device according to claim 1, wherein the air curtain airflow nozzle has a width of 30 to 80 mm, preferably 50 mm.   2. The air curtain device according to claim 1, wherein the outdoor air suction port of the air suction / blowout device is narrowed to increase the suction airflow velocity of the suction port.

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