JP5808986B2 - Air blowing device - Google Patents

Description

  The present invention relates to an air blowing device that can be used in a push type, push-push type, push-pull type, etc. ventilation device, and more specifically, the device that can be used by reducing the blowing area of the air blowing surface. About.

  Traditionally used to improve the cleanliness of air in local work spaces and to collect harmful substances generated in local work spaces without diffusing into the work spaces and surrounding spaces. Push-pull type ventilators are known. An air blowing device that can be used for this clean bench or ventilation device is also known.

  For example, the uniform flow blowing device described in JP2003-4287A (P2003-4287A, Patent Document 1) has an air blowing surface on the front side of a hollow box. A plurality of distribution plates are provided behind the air blowing surface. The air that has flowed into the apparatus passes through between the distribution plates and is then blown out as a uniform air flow from the air blowing surface.

  The local cleaning device described in Japanese Patent Application Laid-Open No. 2008-75945 (P2008-75945A, Patent Document 2) is used to locally clean the inside of a clean room, and is a blowout equipped with an air blowout unit. And a suction device on which an air suction unit is mounted. Both of these devices are arranged so as to sandwich the local area in the clean room to be cleaned.

  Moreover, in the local air cleaning apparatus described in Unexamined-Japanese-Patent No. 2008-275266 (P2008-275266A, patent document 3), a pair of push hood which can blow off the uniform flow of the cleaned air is the air. It is used so that the air flow opening surface for blowing out is opposed. That is, the pair of push hoods are used in a state where the air flows from each collide.

Japanese Patent Laid-Open No. 2003-4287 JP 2008-75945 A JP 2008-275266 A

  Since these conventional apparatuses blow out air from a blowing surface having a constant area, the area of the blowing surface may be excessive compared to the work space required by the worker. As a result, the apparatus may waste power by blowing an excessive amount of air toward the work space.

  Therefore, an object of the present invention is to improve the conventional blowing device so that the blowing device can be used even when the area of the blowing surface is reduced.

In order to solve the above-mentioned problem, the present invention is directed to an air flow path from an upstream side to a downstream side, in which a blower unit and a rectifying mechanism unit are provided in order, and the rectifying mechanism exits the blower unit. It is an air blowing device capable of purifying the air flowing into the section and blowing it out toward the downstream side of the rectifying mechanism section.

The features of the present invention are as follows. That is, the air blowing device has a front-rear direction, a width direction, and a vertical direction perpendicular to each other, and the front-rear direction is a direction in which the downstream side is the front and the upstream side is the rear, and the rectifying mechanism An air blowing surface having a large number of ventilation holes penetrating in the front-rear direction is formed on the downstream side of the portion, and in the rectifying mechanism portion, an air flow path toward the air blowing surface is formed in the width direction and the upper and lower sides. Are divided into a plurality of sections in at least one direction, and a plurality of wind speed sensors are set between the rectifying mechanism portion and the blowing surface so as to correspond to each of the sections. The rectifying mechanism portion is provided with a shutter that can be opened and closed corresponding to each of the sections on the upstream side of the rectifying mechanism, and when the shutter is opened, the shutter is opened in the section corresponding to the shutter. Balloon become available from the previous SL balloon surface air flows into the rectifying mechanism, stops flow of said air into said rectification mechanism in the partition corresponding to said shutter and shutter closes, the blower unit In at least one of the rectifying mechanism sections, the wind speed detected by the wind speed sensor in the section where the shutter is open is kept within a required range, and the wind speeds in the section where the shutter is open are equal. Further, by controlling the amount of the air flowing into the rectifying mechanism , a uniform air flow is blown downstream of the air blowing surface to form a clean zone .

  In one embodiment of the present invention, the inflow amount is controlled by changing the number of rotations of the fan in the blower section.

  In one embodiment of the present invention, the inflow amount is controlled by changing the opening of the shutter.

  In one embodiment of the present invention, the opening degree of the shutter in each of the sections can be controlled based on the wind speed detected by the wind speed sensor.

  In one embodiment of the present invention, the air flow rate is controlled so that the average value of the wind speed detected by the wind speed sensor in each of the sections where the shutter is open is within a range of 0.2-2 m / sec. .

In one embodiment of the invention, the air blowout device Ru der which incorporates a HEPA filter.

  In the air blowing device according to the present invention, the rectifying mechanism is divided into a plurality of sections, and each of the sections can be closed by a shutter. Therefore, by selecting a section of the blowing device so as to meet the width and vertical dimensions of the work space and opening the shutter of that section, and closing the shutter for the non-selected section, the air blowing surface in this apparatus The area can be reduced with respect to the entire area. In the air blowing device when the area of the blowing surface is reduced, the output for blowing is lowered compared to the air blowing device when all the shutters are opened, and the power consumption in the air blowing device is reduced. Can be saved.

The perspective view of an air blowing apparatus. II-II sectional view taken on the line of FIG. The exploded perspective view of an air blowing part. The figure which shows an air blowing apparatus and a wind speed measurement point. The figure which shows the measurement result about a wind speed and an air cleanliness. The same figure as FIG. The same figure as FIG. The figure which shows the measurement point of a push-push type blowing apparatus and floating dust concentration.

  The details of the air blowing device according to the present invention will be described below with reference to the accompanying drawings.

  1 and 2, FIG. 1 is a perspective view of the air blowing device 10, and FIG. 2 is a cross-sectional view taken along the line II-II of FIG. Regarding the device 10, the double-headed arrow X indicates the width direction, the double-headed arrow Y indicates the up-down direction, and the double-headed arrow Z indicates the front-rear direction. When referring to the front in the device 10, it means a direction from the rear portion 30 to the front portion 20 described later.

  The air blowing device 10 illustrated in FIG. 1 includes a front part 20, a rear part 30, a top part 40, a bottom part 60, and both side parts 70. When viewed in the vertical direction Y, the apparatus 10 also has an air blowing part 22, an operation part 12 located above the air blowing part 22, and a blower part 21 located below and also serving as an outside air intake part. A caster 13 for moving the device 10 is attached to the bottom 60.

In the apparatus 10, air is taken in from the rear portion 30 side of the blower portion 21 and blown out from the blowing plate 11 located at the forefront portion of the air blowing portion 22. The blowing plate 11 has a large number of vent holes 70a, and air is blown forward from the vent holes 70a. Moreover, in the preferable apparatus 10, the air from the blowing plate 11 is blown out as a uniform air flow, and in the more preferable apparatus 10, the air from the blowing plate 11 becomes a uniform air flow formed by clean air. Blown out. In the present invention, the uniform air flow is sometimes referred to as a uniform air flow. The uniform air flow and the uniform flow here are synonymous with the uniform flow described in Taro Hayashi, “Factory ventilation” (published in 1982 by the Society for Air Conditioning and Sanitation). However, the present invention is not intended to provide an air blowing device in which the flow velocity and velocity distribution of air are strictly defined, and the variation in the flow velocity of air as a uniform air flow in front of the blowing surface 11 The allowable range can be determined according to the purpose of use of the device 10. Arrows S ₁ and S ₂ in the figure indicate the direction of air flow from the upstream side to the downstream side. The front portion 20 of the operation unit 12 monitors the clogging state of an on / off switch 12a for starting and stopping the air blowing device 10 and filters 24 and 29 (see FIG. 2) described later in the device 10. For example, a display unit 12b, a section selection button 12c of the rectifying unit 33 to be described later, and the like.

  FIG. 2 shows an internal structure in the vertical direction Y of the apparatus 10 and an air flow path in the apparatus 10. In addition, although the electrical wiring, the circuit board, etc. which are required in order to drive | operate the apparatus 10 are accommodated in the inside of the operation part 12, those illustration is abbreviate | omitted.

In FIG. 2, the air blower 21 that forms the lower part of the device 10 has a breathable first rear panel 23 at the rear portion 30 of the device 10. A pretreatment filter 24 is set in a removable state on the inner side of the first rear panel 23, that is, on the downstream side of the first rear panel 23. A fan 26 for taking in outside air such as a sirocco fan is set downstream of the preprocessing filter 24. The fan 26 can be inspected and replaced by removing the front panel 27 that forms a part of the front portion 20. When the fan 26 rotates, outside air is the flow indicated by the arrow F ₁ through a pre-processing filter 24 and the first rear panel 23, the apparatus 10 further a flow shown by the arrow F ₂ via the fan 26 It is sent to the air blowing unit 22.

In the air blowing part 22, the rear part 30 is formed by a non-breathable second rear panel 25. A first space 28 into which the air sent from the blower unit 21 flows is formed on the upstream side of the air blowing unit 22. A high-performance filter 29, which will be described later, indicated by an imaginary line can be attached to and detached from the downstream side of the first space 28. A shutter 32 that extends in the vertical direction Y and the width direction X of the apparatus 10 is set on the downstream side of the high-performance filter 29. On the downstream side of the shutter 32, a rectifying unit 33 that forms a rectifying mechanism portion in the apparatus 10 is set in a removable state inside the air blowing portion 22, and is separated from the rectifying unit 33 by a required distance downstream. Has a blowing plate 11, and the blowing plate 11 has a breathable front surface portion 11f which is an air blowing surface. A plurality of wind speed sensors 82 are set between the rectifying unit 33 and the blowing plate 11. The breathable front portion 11 f is a breathable portion through which the air taken into the apparatus 10 passes last, in other words, a breathable portion located at the forefront of the air blowing portion 22. Flow F ₂ in air is blown out a shutter 32 at the air outlet unit 22 the rectification unit 33 and the next flow F ₃ passing, the flow F ₄ of the air toward the outside from the ventilation front portion 11f. These flows F ₂ , F ₃ , and F ₄ also indicate air flow paths in the apparatus 10.

  In the rectifying unit 33, the first honeycomb plate 51, the first punching metal 53, the second punching metal 55, and the second honeycomb plate 57 are arranged in order from the upstream side to the downstream side through spacers (not shown). It is integrally held by a fixing frame member 37. On the upstream side of the fixing frame member 37, a rear frame portion 37a for accommodating the shutter 32 so as to be opened and closed is formed. In the present invention, the structure of the rectifying unit 33 is not limited to the illustrated example, and for example, the number of honeycomb plates, spacers, and punching metals can be increased or decreased as appropriate.

  The first and second honeycomb plates 51 and 57 have a rectifying effect on the air flow, and all the air holes (see reference numeral 57a in FIG. 3) in the honeycomb structure are downstream from the upstream side. The air that has passed through the vents tends to go straight toward the downstream side.

  On the upstream surface of each of the first punching metal 53, the second punching metal 55, and the second honeycomb plate 57 that are separated from each other via the spacer, the air flowing toward the downstream side of the device 10 extends along the surface. It spreads in the width direction X and the up-down direction Y.

  The first punching metal 53 and the second punching metal 55 allow air that has spread in the width direction X and the vertical direction Y to flow toward the second honeycomb plate 57.

In FIG. 2, the air that has entered the rectifying unit 33 is blown out from the second honeycomb plate 57 and enters a space 41 formed on the downstream side of the second honeycomb plate 57. In the space 41, the air spreads in the width direction X and the vertical direction Y, and the air becomes a flow F ₄ (see FIG. 2) that is a uniform air flow from the entire air-permeable front portion 11 f of the blowing plate 11. It blows out in the downstream direction B.

  FIG. 3 is an exploded perspective view of the inside of the air blowing portion 22. In this figure, the shutter 32, the rectification unit 33, and the blowing plate 11 are arranged from the upstream side toward the downstream side. The shutter 32 forms a part of the rectification unit 33, but is shown in a state where the shutter 32 is separated from the rectification unit 33 in the drawing.

  The shutter 32 is divided into first, second, and third rows that extend in the vertical direction Y, and A, B, and C columns that extend in the width direction X. The sections 1A, 1B, 1C, 2A, 2B, 2C, 3A, 3B, 3C are formed. Each section forms a jalousie window having movable fins 86 extending in the vertical direction Y in parallel with each other, and the movable fins 86 are fully opened or closed for each section by a signal from the shutter opening / closing circuit 87. can do. The shutter opening / closing circuit 87 is connected to a push button 12c (see FIG. 1) for selecting a section for closing the shutter 32. When operating the apparatus 10, if the shutter 32 or the movable fin 86 in a certain section is in the fully open state, is the section in the fully open state equal to the average value of the wind speed required by the rectifying unit 33? , Meaning that the air is being blown out at a wind speed substantially equal to the average value. In the apparatus 10, a shutter having a shape and a mechanism different from that of the illustrated shutter 32 can be used. The partitions in the illustrated example are all formed in the same shape and size. However, in the apparatus 10, the size of the partitions can be changed for each row and / or for each column.

  The rectifying unit 33 is partitioned by a partition wall (not shown) so that the insides of the frame member 37 and the rear frame portion 37a define partitions 1A-1C, 2B-2C, and 3A-3C in the same manner as the shutter 32. ing. Each of the sections 1A-1C, 2A-2C, 3A-3C of the shutter 32 is fitted in each of the sections 1A-1C, 2A-2C, 3A-3C of the rear frame portion 37a, and the rectifying unit 33 in the state of FIG. Can be obtained. In FIG. 2, the shutter 32 is fully opened. On the front surface of the rectifying unit 33, the air holes 57a of the second honeycomb plate 57 are visible. In each of the sections 1A-1C, 2A-2C, and 3A-3C, a wind speed sensor 82 is set in front of the second honeycomb plate 57, preferably within a range of 5-10 mm in front of the second honeycomb plate 57. Each of 82 is connected to the wind speed control circuit 83. The wind speed control circuit 83 is connected to the fan 26 (see also FIG. 2).

  The blowing plate 11 is made of, for example, punching metal, and is positioned in front of the sensor 82 and has a large number of air blowing holes 70a formed on the front surface portion 11f. In FIG. Only a portion of is shown. The blowing plate 11 may be divided into sections 1A-1C, 2A-2C, and 3A-3C on the upstream side thereof similarly to the rectifying unit 33, but the blowing plate 11 is not divided in such a manner. The vertical lines 101 and the horizontal lines 102 are drawn on the front surface portion 11f as shown in the example so that it can be clearly shown that the sections 1A-1C, 2A-2C, 3A-3C are formed on the upstream side. May be.

  In the rectifying unit 33, adjacent sections are partitioned so as not to leak air, that is, in a non-breathable state. Therefore, the air that has passed through the shutter 32 in one section passes through the inside of the section and is blown out from the blowing surface 11f. In the air blowing section 22, at least the sections provided in the shutter 32 and the rectifying unit 33 are not limited to the illustrated example. Depending on the purpose of use of the apparatus 10, the rectifying unit 33 including the shutter 32 is divided so as to have a plurality of sections in at least one of the width direction X and the vertical direction Y.

  In the rectifying unit 33 thus formed, the first and second honeycomb plates 51 and 57 have, for example, a hole diameter in the honeycomb structure in the range of 1 to 10 mm, and the length of the ventilation hole, in other words, Then, a honeycomb plate having a thickness in the range of 3 to 30 mm can be used. The first and second punching metals 53 and 55 have, for example, a stainless steel plate or aluminum plate having a thickness of 0.5 to 2.5 mm and a vent hole having a hole diameter of 0.5 to 4 mm. Those that are uniformly formed and the ratio of the area occupied by the air holes can be in the range of 20-50%.

  An example of a plate material for manufacturing the blowing plate 11 located on the downstream side of the rectifying unit 33 is a metal plate such as a stainless steel plate having a thickness of 0.5 to 2.5 mm. A metal aperture plate generally called punching metal is an example of the metal plate.

The breathable front surface portion 11f of the blowing plate 11 can be a rectangular one having a side length in the range of, for example, 400 to 2000 mm. A circular vent hole 70a is formed in the breathable front portion 11f, the diameter of the vent hole 70a is set in the range of 0.5-4 mm, and the distance between the centers of the adjacent vent holes 70a is set in the range of 1-6 mm. It is preferable that the ratio of the area occupied by the air-permeable front portion 11f to the area of 10 cm ² is 20 to 50%. The air holes 70a can be uniformly distributed with respect to the air permeable front portion 11f while being arranged in a zigzag arrangement or in a lattice arrangement, depending on the portion of the air permeable front portion 11f. The hole diameter and the distance between the centers can also be changed. Further, a shape other than a circle can be adopted as the shape of the vent hole 70a. Air velocity of flow _{F 4} from breathable front portion 11f having such a vent hole 70a is preferably set to approximately 0.2-2.0m / sec, 0.3-1.8m / sec More preferably, the degree is set.

  Needless to say, the device 10 according to the present invention can be used as a single blowing device, but is used as a blowing device for an open clean zone obtained by opposing two blowing devices. Or, it can be used as a blow-out device in a push-pull type ventilation device in which one blow-out device and one suction device are opposed to each other. In addition, the device 10 can also use the second device 10 that is the same as the device 10 side by side, that is, adjacent to each other in the width direction X. In addition, when trying to obtain a space through which clean air flows, that is, a clean zone, by the apparatus 10, it is necessary to attach a high-performance filter 29 such as a HEPA filter illustrated in phantom lines in FIG.

  In the device 10 thus formed, the blowing plate is selected by selecting a section where the shutter 32 is to be fully opened, in other words, by selecting a section where the shutter 32 is to be fully closed, in accordance with the purpose of use of the device 10 and the like. 11 can be operated with the air blowing area substantially reduced. In the device 10, all the shutters 32 are fully opened, and the average value of the wind speed detected by the wind speed sensor 82 is in the range of 0.2-2.0 m / sec, more preferably 0.3-1.8 m / sec. In addition to being able to operate with the wind speed controlled in this way, the average value of the wind speed is 0.2− for example only from the sections where the shutters 32 of some sections are fully closed and the shutter 32 is fully open. It is also possible to operate by controlling the wind speed so that it is in the range of 2.0 m / sec. When the device 10 is operated so as to reduce the air volume of the device 10 by lowering the output of the fan 26 so as to correspond to the blowing area when the shutter 32 is closed in this way, the power consumption of the device 10 can be saved. Is possible. It should be noted that keeping the value of the wind speed within such a range is important in avoiding the turbulent flow of the air blown forward of the apparatus 10.

FIG. 4 is a perspective view of the device 10, which is placed in a test chamber (not shown) for evaluating the performance of the device 10 when any of the shutters 32 are closed. In the figure, positions P _{1 to} P ₉ of sensors (not shown) for measuring the suspended particle concentration Cp and the wind speed in front of the air-permeable front portion 11f are also shown. The apparatus 10 has sections 1A-1C, 2A-2C, and 3A-3C that are the same size as the section illustrated in FIG. 3, with a breathable front portion 11f having a width of 900 mm and a height of 700 mm. As a high-performance filter 29, a HEPA filter having a collection efficiency of 99.97% for particles having a particle diameter of 0.3 μm is used. Each of the sensor positions P1-P9 is at the center of each of the sections 1A, 2A, 3A, 1B, 2B, 3B, 1C, 2C, 3C, and the distance L from the air-permeable front portion 11f to the downstream side (front). ₁ can be set to 0.5, 1.0, and 2.0 m. The suspended particle concentration Cp is a value measured using a laser particle counter KC-18 manufactured by RION, and the air cleanliness Q (%) described in Table 1-3 below is expressed by the following Equation 1. There is a relationship.

Air cleanliness Q (%) = (Co−Cp) / Cp × 100 (Equation 1)
Here, Cp: concentration of suspended particles at any of the measurement points P _{1 to} P ₉ (number / m ³ )
Co: room air sampled upstream of the pretreatment filter 24 in the apparatus 10
Converting the number of airborne particles 1L (liter) to the number of air per 1 m ³
Concentration of suspended particles obtained in this way (number / m ³ )

  The wind speed is a value measured using an anemometer Model 1560 manufactured by KANOMAX.

Table 1 shows the distribution of the wind speed and the air cleanliness Q when there is a section where the shutter 32 is closed for the apparatus 10 of FIG. In the apparatus 10, while the shutter 32 of the section scheduled for the test is closed, the rotation of the fan 26 is controlled so that the average wind speed for the section where the shutter 32 is open is 0.5 m / sec. After the value of was stabilized, the wind speed and the suspended particle concentration Cp at the measurement points P ₁ -P ₉ were measured. A section marked with * in Table 1 means that the shutter 32 of the section is closed. The air cleanliness Q is a value calculated by substituting the suspended particle concentration Cp of air in front of the air-permeable front portion 11f and the suspended particle concentration Co of indoor air measured in advance into Equation 1. Measurement example 0 in Table 1 shows measurement results for the apparatus 10 when the shutters 32 are open in all the sections 1A-1C, 2A-2C, and 3A-3C. Measurement Example 3 shows the measurement results for the apparatus 10 when the shutter 32 of the section 2B located in the center of the breathable front portion 11f is closed, and Measurement Example 8 shows the sections 2A-2C located in the second row. The measurement result about the apparatus 10 when the shutter 32 of all is closed is shown.

FIG. 5-7 is a graph showing the relationship between the wind speed, the air cleanliness Q, and the distance L ₁ for some of the measurement points in Table 1. Among these figures, FIG. 5 shows the wind speeds at the measurement points P ₄ and P ₇ and the air cleanliness Q at the measurement points P ₇ and P _{8 in} the measurement example 0. Regarding the wind speed, the measurement point P ₄ is selected as a point indicating the maximum value among the measurement points P ₁ -P ₉ , and P ₇ is selected as the point indicating the minimum value. For air cleanliness Q, the measurement point P ₈ is selected as point indicating a generally maximum value among the measurement points P ₁ -P _9, the measuring point P ₇ is selected as a point generally indicates the minimum value. FIG. 6 shows the wind speed at the measurement points P ₅ and P ₇ and the air cleanliness Q at the measurement points P ₃ and P ₅ in Measurement Example 3. For wind speeds, the measuring point P ₇ is generally chosen as a point indicating the maximum value, the measurement point P ₅ is selected as a point generally indicates the minimum value. For air cleanliness Q, the measurement point P ₅ is generally chosen as a point indicating the maximum value, it is selected as the point indicating the generally minimum value measurement point P _3. FIG. 7 shows the wind speed at the measurement points P ₄ and P ₅ and the air cleanliness Q at the measurement points P ₂ and P ₄ in Measurement Example 8. Regarding the wind speed, the measurement point P ₄ is selected as a point indicating the maximum value, and the measurement point P ₅ is generally selected as the point indicating the minimum value. For air cleanliness Q, the measurement point P ₄ is generally chosen as a point indicating the maximum value, the measurement point P ₂ is chosen as a point generally indicates the minimum value.

Based on the Table 1 and Figure 5-7, when the shutter 32 of the compartment 2B as measurement example 3 is closed, the wind speed at the front distance _{L 1} is 0.5m in section 2B from breathable front portion 11f It is low and the air flow is not uniform. However, in the range of L ₁ = 1.5-2.0 m, the wind speed in front of the section 2B increases and the variation width of the wind speed in the apparatus 10 becomes narrow, so that the air flow tends to approach a uniform flow. . Air cleanliness Q is high in at a distance _{L 1} from breathable front portion 11f is 0.5-1.0 M, with the distance _{L 1} is numerically more is greatly reduced, variation width increases. When working using the apparatus 10 of Measurement Example 3 as described above, it is preferable to provide a work place within a range of 0.5 to 1.0 m from the air permeable front portion 11f.

  In the apparatus 10 of Measurement Example 8, as the distance away from the air permeable front portion 11f increases, the air flows in front of the sections 2A, 2B, and 2C where the shutter 32 is closed, and the difference in wind speed between the sections. And the difference between the air cleanliness Q tend to be small, but not so much that a uniform flow flows, and not so much that a clean zone having an air cleanliness Q of 99.9% or more is obtained.

FIG. 8 shows a blowing device 10 when used as a push-push type blowing device 111. In FIG. 8, two devices 10 illustrated in FIG. 4 are used, and the air-permeable front portion 11 f of each device 10 faces in the front-rear direction Z and is separated by a distance L. Of the two devices 10, the one located on the left side of the figure is given the reference symbol 10 _L , and the one located on the right side is given the reference symbol 10 _R. 10 _L is partitioned 1A-1C arranged similarly to apparatus 10 in FIG. 4, 2A-2C, has a 3A-3C, apparatus 10 _R is partitioned 1A-1C of the apparatus 10 _L, 2A-2C, Sections 1A-1C, 2A-2C, and 3A-3C are provided at positions facing each of 3A-3C. Thus, between the device 10 _L as the device 10 _R, compartments 1A-1C, 2A-2C, 3A-3C are arranged to be mirror-symmetrical. In the devices 10 _L and 10 _R , the rotation speed of the fan 24 is controlled so that the average value of the wind speed of the air blown from the section where the shutter 32 is open is 0.5 m / sec.

FIG. 8 also shows positions P ₁ -P ₉ of sensors (not shown) that measure the suspended particle concentration Cp between the devices 10 _L and 10 _R. Each position _P 1 -P _9, partition 1A-1C of the apparatus 10 _L, 2A-2C, the center of 3A-3C, respectively. Each of the positions P ₁ -P ₉ is also at a position where the distance from the breathable front portion 11 f of the device 10 _L is L / 6, L / 2, 5L / 6, and the distance L is the opposite ventilation. This is a separation distance of the front surface portion 11f. The suspended particle concentration Cp is measured at a maximum of 27 measurement points.

Tables 2 and 3 show changes in the air cleanliness Q caused by closing the shutters 32 in some sections for the devices 10 _L and 10 _R when the separation distance L is set to 1 m and 1.5 m. Show. The air cleanliness Q can be obtained from the suspended particle concentration Co on the upstream side of the apparatus 10 _{L and} the suspended particle concentration Cp measured at each of the positions P _{1 to} P ₉ by using Equation 1. Of the air cleanliness Q, those marked with a # mark indicate that the cleanliness is less than 99.9%.

In Tables 2 and 3, measurement example 0 shows the measurement results for the push-push type blow-out device 111 when using the device 10 _L and the device 10 _R in which the shutter 32 is fully opened in all sections. Yes. The device 111 in this case is substantially the same as a push-push type blowing device using two blowing devices not provided with the shutter 32. In measurement example 0, even when L = 1 m and L = 1.5 m, the entire space between the device 10 _L and the device 10 _R has a clean zone Q having an air cleanliness Q of 99.9% or more. Become. In measurement example 1-8, the shutter 32 is closed in one of compartments in the apparatus 10 _L and the apparatus 10 _R. By the shutter 32 is closed, between the device 10 _L as the device 10 _R, the air cleanliness Q is likely to occur the zone is less than 99.9%. However, as in the measurement example 3, 8, when the closing section 2B or compartment 2A positioned at the center in the width direction X in the apparatus 10 _L and the device 10 _R, 2B, the shutter 32 of 2C, the two devices The entire space between 10 _L and 10 _R becomes a clean zone having an air cleanliness Q of 99.9% or more. Further, even in measurement example other than the measurement example 3 and 8, two devices 10 _L, 10 Between the compartments each other that face each other of _R, when the shutter 32 is in the fully opened air cleanliness Q However, the size of the space in the front-rear direction Z may be shorter than when all the shutters 32 are fully open. Even when the shutter 32 is fully closed, a space with a relatively high air cleanliness Q can be obtained. Depending on the type of work using the push-push type blow-out device 111, the shutters 32 are closed in some sections, and then the work is carried out at a site having a high air cleanliness Q obtained thereafter, whereby the devices 10 _L , 10 Power consumption in _R can be saved.

  In the illustrated examples so far, the shutter 32 is in a fully open state or a fully closed state, and the amount of air flowing from the blower unit 21 to the rectifying unit 33 is controlled by the rotational speed of the fan 26. However, the amount of inflow is controlled by the opening degree of the shutter 32 and the rotational speed of the fan 26 that can change the opening degree continuously or stepwise between the fully open state and the fully closed state. May be. The amount of air inflow can also be controlled by changing the opening of the shutter 32 continuously or stepwise based on the wind speed detected by the wind speed sensor 82 while maintaining the fan 26 at a constant rotational speed. Is possible. However, in this case, it is not possible to expect a reduction in power consumption. Although the apparatus 10 in the illustrated example includes the fan 26, the present invention may be implemented by the apparatus 10 that receives air from the air blowing unit provided at a position separated from the apparatus 10 instead of the fan 26. Is possible.

1A, 1B, 1C Section 2A, 2B, 2C Section 3A, 3B, 3C Section 10, 10L, 10L Blowout device 11c Vent 11f Breathable front section 11a Side section (folded section)
21 Blower 26 Fan 29 High-performance filter (HEPA filter)
32 Shutter 33 Rectification mechanism (rectification unit)
82 Air velocity sensor 70a Ventilation hole X Width direction Y Vertical direction Z Front / back direction

Claims (6)

A blower unit and a rectifying mechanism unit are sequentially provided in the air flow path from the upstream side to the downstream side, and the air flowing out of the blower unit and flowing into the rectifying mechanism unit is cleaned to the downstream side of the rectifying mechanism unit An air blowing device capable of blowing toward
The air blowing device has a front-rear direction, a width direction, and a vertical direction perpendicular to each other, and the front-rear direction is a direction in which the downstream side is the front and the upstream side is the rear,
On the downstream side of the rectifying mechanism portion, an air blowing surface having a large number of ventilation holes penetrating in the front-rear direction is formed,
In the rectifying mechanism, the air flow path toward the air blowing surface is divided into a plurality of sections in at least one of the width direction and the vertical direction.
Between the rectifying mechanism and the blowing surface, a plurality of wind speed sensors are set so as to correspond to each of the sections,
The rectifying mechanism section is provided with a shutter that can be opened and closed corresponding to each of the sections on the upstream side thereof, and when the shutter is opened, the air is rectified in the section corresponding to the shutter. balloon becomes available from the previous SL balloon surface flows into the parts, stops the inflow of the air into the rectifying mechanism at the partition corresponding to said shutter and shutter is closed,
In at least one of the blower unit and the rectifying mechanism unit, the wind speed detected by the wind speed sensor in the section where the shutter is open is kept within a required range, and the wind speed of the section where the shutter is open is The air blowing device is characterized in that a uniform air flow is blown to the downstream side of the air blowing surface to form a clean zone by controlling the amount of the air flowing into the rectifying mechanism so as to be equal. . The air blowing device according to claim 1, wherein the inflow amount is controlled by changing an opening degree of the shutter. The air blowing device according to claim 2 , wherein the opening degree of the shutter in each of the sections can be controlled based on a wind speed detected by the wind speed sensor. The air blowing device according to any one of claims 1 to 3, wherein the inflow amount is controlled by changing a rotational speed of a fan in the blower section. Claim 1 4 wherein the wind speed sensor of each of said compartments the shutter is open controls the inflow amount so kept in the range of 0.2-2.0m / sec the average value of the wind speed detecting The air blowing device described in 1. Air balloon device according to any of Der Ru claim 1 5 as the air outlet device with a built-in HEPA filter.

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