TWI609159B - Local air cleaning device - Google Patents

Description

Local air purification device

The present invention relates to a partial air purification device.

It has been frequently used as a clean bench to improve the air purity of a partial work space. In a general clean room, a working opening is formed only on the front side surface of the work table, and the other surfaces are surrounded to maintain the cleanliness. In such a clean table, a clean air blowing port is disposed in the surrounding area, and an operator's hand extends from the front working opening to perform work.

However, since the operation opening of the clean bench is narrow, the operator has a problem in workability in the case of performing an assembly operation of a precision machine or the like. Moreover, in the case where the product and the manufactured component are moved together in the production line, the measures for putting the entire production line into the clean room have been taken, but such disposal may cause the scale of the device to become large. .

Accordingly, the inventors of the present invention have proposed a partial air purifying apparatus which can be disposed in such a manner that an air flow opening face of a pair of blown-out hoods capable of blowing cleaned air is relatively opposed Since the air flow from the opening surface of each air flow collides, the cleanliness of the area between the pair of blow-out hoods is higher than the cleanliness of the other areas (Patent Document 1).

Prior Technical Literature Patent Literature

Patent Document 1 discloses JP-A-2008-275266

Therefore, in some cases, work is performed in a clean space having a wider range according to the type of work and the work flow. Therefore, a local air purification device capable of forming a wider clean air space is desired.

The present invention has been made in view of the above problems, and an object thereof is to provide a local air purification device capable of forming a large clean air space.

In order to achieve the above object, a partial air purifying apparatus according to a first aspect of the present invention is characterized in that the present invention comprises: a pair of blow-out type exhaust hoods having an air flow opening face for blowing a purified uniform air flow, and Provided on the air-air opening face side of the pair of blow-out hoods, extending from the air-air opening face side toward the downstream side of the uniform airflow, and forming one of the opening faces on the downstream-side end The pair of blow-out hoods are disposed such that the respective air-air opening faces are opposed to each other, and the opening faces of the pair of guide plates are opposed to each other so as to face each other Forming an open area between the opening faces of the guide plate, and flowing out of the open area by colliding the purified purified uniform air flow blown from the air air opening faces in the open area to make the guide plate The cleanliness in the inner and the aforementioned open areas is higher than that in the other areas.

A local air purification device according to a second aspect of the present invention is characterized in that it has: a pair of blow-out type exhaust hoods for blowing an air flow opening surface of a cleaned and purified uniform air flow, and an air flow opening face side of the blow-out type exhaust hood provided in one of the pair of blow-out type exhaust hoods a guide plate extending from the side of the air flow opening surface toward the downstream side of the uniform air flow and forming an opening surface at the downstream end portion; wherein the pair of blow-out hoods are configured such that the respective air flow opening faces are formed Arranging in an opposing manner, the opening surface of the guide plate is opposed to the air flow opening surface of the blow-through hood not provided with the guide plate so as to face the opening surface of the guide plate. Forming an open area between the air flow opening surface of the blow-through hood not provided with the guide plate, by causing the cleaned uniform air flow blown from the air air opening faces to collide in the open area The flow out of the open area is such that the cleanliness in the guide and in the open area is higher than that in the other areas.

In the partial air cleaning device according to the first aspect, preferably, each of the opening faces of the guide plate has a shape that is substantially the same.

In the partial air cleaning device according to the second aspect, preferably, the opening surface of the guide plate and the air flow opening surface of the blow-out type air hood that does not have the guide plate are substantially the same shape.

Preferably, the opening surface of the guide plate has an approximately the same shape as the air flow opening surface of the blow-out type air hood to which the guide plate is attached.

The pair of blow-out hoods may be configured by, for example, connecting a plurality of blow-out hoods.

Purified uniform air blown from the open face of the air flow The flow rate of the gas stream is preferably 0.2 to 0.7 m/s.

According to the present invention, a large amount of clean air space can be formed.

"Forms for Implementing Inventions"

Hereinafter, the local air purification device of the present invention will be described with reference to the drawings. Fig. 1 is a view showing an example of a partial air purification device according to an embodiment of the present invention.

As shown in Fig. 1, the local air purification device 1 of the present invention includes a pair of blow-through hoods 2, 3 disposed opposite each other, and guides provided to the respective blow-up hoods 2, 3, respectively. Boards 4, 5.

The pair of blow-out hoods 2, 3 may be any one having a mechanism for blowing a cleaned and purified uniform air flow, and may be used: a blow-out type hood that is conventionally used in a push pull type ventilator. As a basic structure, it has a structure in which a filter for cleaning is provided.

The uniform airflow and the first-class airflow system referred to here are the same as those recorded by Lin Tailang in the "Workplace Ventilation" (Air Harmonization. The Institute of Sanitary Engineering issued in 1982), which means that the uniformity is continuous and does not produce large eddy currents. The rapid flow of the breeze. However, the present invention is not intended to provide an air blowing device that rigorously defines the flow rate and velocity distribution of air. The uniform air flow is preferably such that, for example, the variation of the velocity distribution in the state of no obstacle is within ±50% with respect to the average value, and more preferably within ±30%.

In the blow-out type hoods 2 and 3 of the present embodiment, nine (three vertical × three horizontal) blow-through hoods are connected by a connecting means such that the air flow opening faces are in the same direction. The short sides of the blow-out hood are arranged side by side with each other and the long sides are connected to each other. Here, because The structure of the blow-through hood that is connected to the connecting device is basically the same. Therefore, the structure of one of the blow-out hoods 2a will be described, and the blow-out hoods 2, 3 of the present embodiment will be described. Construction. Fig. 2 is a view showing the configuration of the blow-out type hood 2a.

As shown in Fig. 2, the casing 21 of the blow-out hood 2a is formed in a substantially rectangular parallelepiped shape, and an air flow suction surface 22 is formed on one of the sides. The air flow suction surface 22 is formed, for example, by a surface in which a plurality of holes are formed on one surface of the casing 21 as a whole. At the air flow suction surface 22, the outside air and the indoor air outside the blow-out hood 2a are taken out from the holes. Further, an air blowing surface (air flow opening surface) 23 is formed on the other surface facing the air flow suction surface 22 of the casing 21. The air flow opening surface 23 is formed, for example, by a surface in which a plurality of holes are formed on one surface of one surface of the casing 21. On the air flow opening surface 23, a uniform air flow of clean air formed in the blow-through hood 2a is blown out from the hole to the outside of the blow-out hood 2a. The size of the air flow opening face 23 of the blow-out type hood 2a is not particularly limited, but may be, for example, 1050 mm × 850 mm.

The blow-out hoods 2, 3 are arranged such that the individual airflow opening faces 23 are opposed to each other. Here, the individual airflow opening faces 23 are opposed to each other, and are not limited to the respective airflow opening faces 23 of the blow-through hoods 2, 3, and are in a state of being opposed to each other, for example, as shown in FIG. As shown in the figure, the air flow opening face 23 of the blow-out type hood 2 and the air flow opening face 23 of the blow-out type hood 3 are in a state of being inclined. The inclination of the air flow opening face 23 of the blow-out hood 2 and the air flow opening face 23 of the blow-out hood 3 is preferably such that the individual airflow opening faces 23 form an angle of 10° with each other. Within the range of left and right. Further, as shown in Fig. 7, the air flow blown from the mutually open faces is a frontal collision, but the state in which the central axis is deviated is also included in the state in which the individual airflow opening faces 23 are opposed to each other. .

A blower mechanism 24, a high performance filter 25, and a rectifying mechanism 26 are disposed in the casing 21.

The air blowing mechanism 24 is disposed on the air flow suction surface 22 side in the casing 21. The blower mechanism 24 is constituted by a fan for air intake or the like. The air blowing mechanism 24 obtains the air outside the ambient air and the indoor air from the air-flow air intake surface 22, and blows the air flow from the air flow opening surface 23. Further, the air blowing mechanism 24 is formed such that the flow velocity of the air flow blown from the air flow opening surface 23 is variable by controlling the blowing force of the fan.

The high performance filter 25 is disposed between the air blowing mechanism 24 and the rectifying mechanism 26. The high-performance filter 25 is composed of a high-performance filter that meets the purification level such as a HEPA filter (High Efficiency Particulate Air Filter) for filtering the obtained ambient air. The high-performance filter 25 is a clean air that purifies the surrounding air obtained by the air blowing mechanism 24 to a desired washing and purifying level. The clean air that has been cleaned up to a desired purge level by the high-performance filter 25 is sent to the rectifying mechanism 26 via the blower mechanism 24.

The rectifying mechanism 26 is disposed between the high performance filter 25 and the air flow opening surface 23. The rectifying mechanism 26 includes an air blocking body (not shown). The air barrier system is used to correct the supply air having a deviation from the air flow opening surface 23 as a whole, and to correct the uniform air flow (uniform air flow) without any deviation of the air flow opening surface 23 as a whole. The barrier body for supplying air is formed by stamping materials or mesh materials. Rectifier The structure 26 corrects (rectifies) the clean air blown from the high-performance filter 25 into a uniform air flow (uniform air flow) in which the ventilation amount is not varied as a whole with respect to the air flow opening surface 23 as a whole. The rectified uniform air flow is blown out from the air flow opening surface 23 to the outside of the blow-out hood 2 via the air blowing mechanism 24.

Further, it is preferable that the blow-out type hood 2a is provided with a pre-filter 27 between the air flow suction surface 22 and the air blowing means 24 in the casing 21 as shown in Fig. 2 . As far as the pre-filter 27 is concerned, for example, it may be a medium performance filter. By arranging the pre-filter 27 between the air flow suction surface 22 and the air blowing mechanism 24, it is possible to remove relatively large dust contained in the ambient air that has been sucked into the interior of the casing 21 through the air flow suction surface 22. In this way, since the dust can be removed in multiple stages in accordance with the size of the dust contained in the surrounding air, the performance of the high-performance filter 25 which is likely to cause clogging can be maintained for a long period of time.

In the blow-out type hood 2a configured as described above, the ambient air obtained by the blower mechanism 24 is purified by the pre-filter 27 and the high-performance filter 25 to obtain a clean air of a desired purge level. . Then, the cleaned purified air is rectified into a uniform air flow through the rectifying mechanism 26. The uniform air flow thus purified is blown out to the outside from the entirety of the air flow opening face 23 toward the air flow opening face 23 which is almost perpendicular to the blow-out hood 2a.

One end of the guide plates 4, 5 is provided on the side of the air flow opening face 23 of the blow-out type exhaust hoods 2, 3. Further, the guide plates 4 and 5 are provided on the air flow opening surface 23, and from this point, the outer peripheral contour portion that extends toward the downstream side of the uniform air flow that is blown from the air flow opening surface 23 and covers the air flow opening surface 23 The way is formed. For example, in the case where the shape of the air flow opening face 23 is a quadrangle, the cross-sectional shape is extended to A word-like way is formed. With this The open side and the floor of the shape include a state in which the outer peripheral contour portion is covered in the direction in which the uniform air flow is blown, and the flow direction of the airflow is surrounded by the flow direction of the uniformly blown air flow. Moreover, in the absence of the ground, the cross-sectional shape of the guide plates 4, 5 is not The shape of the character is formed, for example, in such a manner that it extends into a mouth shape. The guide plates 4, 5 are formed such that they have an open area between the other other ends (opening faces 41, 51). Here, the opening faces 41, 51 of the guide plates 4, 5 are the downstream end portions of the guide plates 4, 5 which extend in a tunnel shape from the air flow opening face 23 toward the downstream side of the uniformly blown air flow. The hollow end face surrounded by the contour of the peripheral portion (the boundary with the open region), that is, the opening. For example, in the case where the floor is replaced as a part of the guide plates 4, 5, the cross-sectional shape of the guide plates 4, 5 is In the case of a character, the hollow opening formed by the four-corner shape formed by the downstream end of the guide plates 4 and 5 and the floor corresponds to the opening faces 41 and 51; and the cross-sectional shape of the guide plates 4 and 5 is a mouth shape. In the case of the four-angled hollow opening formed at the downstream end of the guide plates 4 and 5, the opening faces 41 and 51 correspond to each other.

The guide plates 4 and 5 may be in a state in which the air flow blown from the opening faces 41 and 51 can be maintained in a cleaned uniform air flow from the air flow opening face 23, and any material can be used. To form. Further, when the guide plates 4 and 5 are maintained in a state of the purified uniform air flow from the air flow opening surface 23, it is possible to completely cover the entire periphery of the uniform air flow, for example, it may be Part of it is to cut into holes and form slits.

Preferably, the opening surface 41 and the opening surface 51 have almost the same shape The same shape. When the uniform air flow collides from the front, as shown in Fig. 4, it is shown that the mutual airflow does not mix and changes into an almost vertical flow behavior. It is a kind of flow that seems to have walls there. Through such a flow, the colliding air flow flows out to the outside of the collision surface. As a result, the mutual airflow is a clear space in a region from the collision surface to the end of the opening surface of each other. By making the shape of the opening surface 41 and the shape of the opening surface 51 into almost the same shape, the size of the surface of the air flow blown from the opening surface 41 and the air flow blown from the opening surface 51 becomes almost the same. Equivalent to the size of the flow surface of the mutual air flow.

However, the shape of the opening surface 41 and the shape of the opening surface 51 may not be substantially the same shape. For example, as shown in FIG. 5, the opening surface 51 may be enlarged to be larger than the opening surface 41. Further, as shown in FIG. 6, the opening surface 51 may be formed to be smaller than the opening surface 41. In such a case, a clear space may be obtained in a region in which the air flow blown from the opening surface 41 and the air flow blown from the opening surface 51 collide with each other at the end portion of the opening surface.

For example, as shown in FIG. 5 and FIG. 6, in the case where the shape (area) of the opening surface 41 and the opening surface 51 is changed by enlarging or reducing the width of the opening surface 51, (the width of the opening surface 51) / ( The width of the air flow opening face 23 is preferably 0.6 to 1.4, more preferably 0.8 to 1.2. When the airflow blown from the opening surface 41 and the opening surface 51 is collided by setting in such a range, the area of the colliding airflow is not remarkably small, and a sufficient clean space for work can be obtained.

Further, the shapes of the opening faces 41, 51 are preferably formed to have almost the same shape as the air flow opening face 23. Because by making the opening faces 41, 51 and the air When the airflow opening faces 23 are formed in almost the same shape, it is easy to maintain the state of the uniform airflow blown from the airflow opening face 23 in the opening faces 41, 51. However, the opening faces 41, 51 and the air flow opening face 23 may not be substantially the same shape. For example, as shown in FIGS. 5 and 6 described above, the width of the opening face 51 may be enlarged or reduced. The opening surface 51 and the air flow opening surface 23 have different shapes. Because in this case, it is also possible to maintain the state of the uniform air flow. When the width of the opening surface 51 is enlarged or reduced, the width of the opening surface 51 / (the width of the air flow opening surface 23) is preferably 0.6 to 1.4, more preferably 0.8 to 1.2. Since it is in such a range, the state of the uniform air flow blown from the air flow opening face 23 can be maintained in the opening face 51.

The guide plates 4 and 5 are arranged such that the opening faces 41 and 51 face each other. Since the opening faces 41, 51 are arranged to face each other, the mutual air flow becomes a collision from the front. Here, the opening faces 41 and 51 are opposed to each other, and the opening faces 41 and 51 are not limited to face each other. For example, as shown in FIG. 3, the opening face 41 of the guide 4 and the guide 5 are also included. The opening surface 51 is in a state of being inclined. Since the air flow blown by the mutual opening faces 41, 51 does not collide from the front side, a space surrounded by the dotted line of FIG. 3 can form a clean space. The inclination between the opening surface 41 of the guide plate 4 and the opening surface 51 of the guide 5 (the angle at which the individual air flow opening faces 23 are formed) is preferably in the range of about 10°. Moreover, as shown in FIG. 7, the air flow blown by the opening surfaces 41 and 51 of each other is a frontal collision, but even if the center axis is deviated, the surface which the air-airs collide with each other can be centered on the mutually open surface. A clean space is formed in the area up to the end.

The length b of the guide plates 4, 5 is as long as the opening faces 41, 51 are The openings may be opposed to each other and may form an open area between the opening faces 41, 51 of the guide plates 4, 5. Preferably, the air flow opening face 23 and the blow-out type exhaust air are provided along with the blow-out type exhaust hood 2. The interval X between the air flow opening faces 23 of the cover 3 and the predetermined length from the flow rate of the uniform air flow blown from the air flow opening faces 23 (open faces 41, 51). For example, in the case where the interval X between the air flow opening face 23 of the blow-out hood 2 and the air flow opening face 23 of the blow-out hood 3 is 12 m, the length b of the guide plates 4, 5 is uniform air flow. When the flow rate is 0.7 m/s, it is preferably 4 m or more, and for example, preferably 4 to 5.75 m. Further, since the length b of the guide plate 3 is 12 m, the preferred one is 3.25 to 5.75 m when the flow rate of the uniform air flow is 0.5 m/s, and preferably 0.2 m/s. It is 5~5.75m; at 0.1m/s, it is preferably 5.5~5.75m.

The guide plates 4 and 5 configured as described above are arranged (installed) on the downstream side of the individual uniform air flow from the side of the air flow opening face 23 of the blow-out hoods 2, 3, as shown in FIG. On the other hand, the opening faces 41 and 51 provided at the downstream end portions thereof are arranged to face each other. Thereby, an open region is formed between the opening faces 51 of the opening faces 41.

In the partial air cleaning device 1 configured as described above, the ambient air in the vicinity of the airflow surface 22 through the air blowing means 24 of the air outlet hood 2 and the air outlet hood 3 is prefiltered. The cleaner 27 and the high performance filter 25 are cleaned to a clean air of a desired purge level. Further, the purified clean air is rectified into a uniform air flow by the rectifying mechanism 26, and the purified uniform air flow is individually blown out from the air flow opening surface 23 to the guide 4 and the guide 5.

Here, the flow rate of the purified and purified uniform air flow blown from the air flow opening surface 23 is preferably 0.7 m/s or less, more preferably 0.5 m/s or less. More preferably, it is 0.4 m/s or less, preferably 0.2 to 0.1 m/s. Since the purged uniform air flow blown from the air flow opening face 23 is moved and pushed into the guide 4 and the guide 5 by the flow rate at the same flow rate, the guide 4 and the guide 5 can be It is easy to maintain a state of uniform air flow. Further, by slowing down the flow rate, noise value and power consumption can be suppressed, and the load of the pre-filter 27 and the high-performance filter 25 can be reduced. On the other hand, in the case where contaminants are generated in the cleaned space of the guide 4 or the guide 5, the flow rate of the uniform air flow is set to about 0.5 m/s, and the flow rate of the uniform air flow is set to be The 0.2 m/s condition removes contaminants from the guides more quickly. In this way, the flow rate of the uniform air flow can be freely set according to the use.

The purified and purified uniform air flow blown by the guide plate 4 is blown out from the opening surface 41 through the guide 4 while maintaining a uniform air flow. Further, the cleaned uniform air flow blown by the guide 5 is blown out from the opening surface 51 by the guide 5 while maintaining a uniform air flow.

The air flow blown from the opening surface 41 and the air flow blown from the opening surface 51 collide in an open area formed between the individual opening faces. The colliding air flow flows out of its open area (outside the local air cleaning device 1). As a result, the cleanliness of the region between the air flow opening face 23 (the inside of the guide 4, the inside of the guide 5, and the open area between the opening face 41 and the opening face 51) can be higher than that of the local air purge. The cleanliness of the area outside the device 1.

Here, the present invention and the local air purification device described in Patent Document 1 are compared. In comparison, the air flow opening surface of the blow-out hood of the two devices is set to be horizontal 1050 mm × vertical 850 mm, In a state in which nine blown-out hoods (three vertical × three horizontal) are connected, they are opposed to each other. In this case, it is confirmed that the partial air cleaning device described in Patent Document 1 has an open area until the distance between the air flow opening faces 23 is about 5.5 m, which is a clean air space. On the other hand, in the partial air cleaning and purifying apparatus 1 of the present invention, in a state in which the nine blowing type exhaust hoods having the same configuration as that of the above-described Patent Document 1 are connected, the pair of blowing type hoods are opposed to each other. In the outer peripheral contour portion of the air flow opening surface, a guide plate having a length of 3.25 m is attached to the downstream side from the air flow opening surface, and the distance between the opening surfaces 41 and 51 is the same as that of the above-mentioned Patent Document 1. When the distance between the air flow opening faces of the windshield is set to 5.5 m in the same manner, the open area between the opening faces 41 and 51 of the clean air space and the pair of blow-out hoods are provided. The sum of the distances from the air flow opening faces to the opening faces of the individual guide plates. That is, the distance 12 m between the air flow opening faces 23 becomes a clean air space. Thus, the local air purification device 1 of the present invention can form a large clean air space.

Moreover, when the present invention is compared with the open air cleaning device using the technique described in Patent Document 1, the wind speed of the uniform air flow blown from the blow-out type exhaust hood of the same area is the same. Therefore, even if the power consumption of the blow-off hoods 2, 3 is the same, the amount of electricity consumed per unit area of the clean space can be reduced. In addition, when the same clean space is cleaned, the wind speed can be reduced as compared with Patent Document 1, so that the number of revolutions of the fan of the air blowing mechanism can be suppressed, and thus power consumption can be reduced. Further, since the wind speed can be reduced, the noise generated by the operation of the local air cleaning device can be reduced, and the consumption of the filter for obtaining clean air can be suppressed. degree. In the case where the open type partial air cleaning device of Patent Document 1 is provided under the above-described conditions, it can be confirmed that the power consumption is 7200 W and the noise value at the center between the opposing air flow opening faces 23 is 75 dB (A). ). On the other hand, when the present invention (the distance 22 m between the air flow opening surface 23 and the air collision surface W and the guide plate 10 m) is set under the above-described installation conditions, it is confirmed that the power consumption at the center of the air flow opening surface 23 is satisfied. The noise value is the same as that of the aforementioned Patent Document 1. In other words, in the space of about 45 m ^ 3 cleaned by the patent document 1, it can be confirmed that the electric power required for purification per cubic meter is about 160 W. On the other hand, in the space of about 177 m 3 cleaned by the present invention, it was confirmed that the electric power required for purification and purification per cubic meter was about 41 W. Further, in the above-described present invention, the distance between the air flow opening faces 23 is 22 m. However, when the distance is increased, the power consumption per unit volume can be reduced.

Further, in a general clean room, it is not easy to clean and clean the entire room. However, in the partial air cleaning device 1 of the present embodiment, the pair of blow-out hoods 2 can be easily moved. , 3. Moreover, as long as the uniform air flow is not affected, the guide plates 4, 5 provided in the blow-up hoods 2, 3 can be bent according to the operation, and the single blow-out hood can also be removed. Since the side guide plates can move the area formed by the opening faces of the guide plates to an arbitrary position or the like, the arrangement change of the work area can be extremely easily changed.

In addition, in the case of a general clean room in which the operator himself or herself enters the clean area, the distance from the floor of the operator's work to the ceiling where the clean air blowing device is installed, even if it is extended, the operator's work area Nor does it change. However, in the local air purification device 1, Since the horizontal flow is used, the area inside the guides 4, 5 can be increased, so that the entire body can enter the work area (ground area) of the operator working in the clean area.

Further, in the open area of the present embodiment, since there is no door for the operator, the article, or the manufacturing machine to enter and exit in the general clean room, there is no clear space area caused by opening the door. The cleanliness is reduced, so you can go in and out of the open area at any time, or items can come in and out. Further, even if it is assumed that the inside of the guide plates 4 and 5 and the open area are contaminated, it is possible to clean and clean the place where it takes a few hours to clean in a general clean room.

As described above, according to the local air cleaning device 1 of the present embodiment, the inside of the guide 4, the inside of the guide 5, and the opening surface 41 and the opening surface 51 can be made via the guide plates 4 and 5. Since the cleanliness of the open area is higher than the cleanliness of the area outside the local air purification device 1, a large clean air space can be formed.

Further, the present invention is not limited to the above-described embodiments, and various modifications and applications are possible. Hereinafter, other embodiments applicable to the present invention will be described.

In the above-described embodiment, the present invention will be described by taking the case where the length of the guide 4 and the length of the guide 5 are the same. However, the length of the guide 4 and the length of the guide 5 may be different. In this case as well, the inside of the guide 4, the inside of the guide 5, and the open area between the opening surface 41 and the opening surface 51 can be made cleaner than the area outside the local air cleaning device 1. The reason for the high cleanliness is that it can form a vast clear air space.

In the above embodiment, although in the blow-out hood 2, 3 The present invention will be described by taking the case where the guide plates 4 and 5 are respectively provided as an example. However, for example, as shown in FIG. 8, only the guide plate 4 may be provided in the blow-out type exhaust hood 2, and the blow-out type exhaust hood 3 may be provided. The guide 4 is not provided. In this case, the cleanliness of the open area between the inside of the guide 4, the opening surface 41, and the air flow opening surface 23 of the blow-out hood 3 can be made smaller than the area outside the local air cleaning device 1. The purity is still high, so it can form a vast clear air space. Thus, in all of the embodiments, the guide plates may be provided on both of the pair of blow-through hoods, or may be provided only on a single one.

In the above-described embodiment, the shapes of the guide plates 4 and 5 connected to the blow-out hoods 2, 3 are directed from the air flow opening surface 23 of the blow-up hoods 2, 3 toward the guide plate. The present invention will be described by taking as an example a case where the opening faces 41, 51 extend straight, but, for example, as shown in FIG. 9, as long as it is a state in which a uniform airflow blown from the airflow opening face 23 can be maintained If you can, you can bend it. In this case, the cleanliness of the open area between the inside of the guide plates 4 and 5 and the opening faces 41 and 51 can be made higher than the cleanliness of the area outside the local air cleaning device 1 . Can form a vast clear air space.

In the above-described embodiment, the case where the blow-out type exhaust hoods 2 and 3 are connected to each of the nine blowout hoods (three vertical and three horizontal) through a connecting tool will be described as an example. In the present invention, the number of the blow-through hoods constituting the blow-out hoods 2, 3 may be 10 or more, or may be 8 or less. For example, the blow-out hoods 2, 3 may be formed by connecting four (two vertical x two horizontal) blow-out hoods by means of a connecting device. In this way, when the blow-out type exhaust hood is connected, the air-flow opening faces of the blow-out type hood are in the same direction, and the blow-out type hood is The short sides are arranged side by side and the long sides are individually connected to each other. In this case, the mutual blow-out type hood is preferably such that the sides, the upper and lower surfaces, or both of the blow-out hoods that are connected to each other are connected in an airtight state or are connected side to side. The side surface, the upper surface, or both of the sides of the blow-out type hood are connected in an airtight state by a sealing material such as a pressing force. Further, as shown in Fig. 10, the blow-out type exhaust hoods 2, 3 may be constituted by one blow-out type exhaust hood. In these cases, the inside of the guide 4, the inside of the guide 5, and the open area between the opening surface 41 and the opening surface 51 can be made cleaner than the area outside the local air cleaning device 1. It is still high, so it can form a vast clear air space. Further, in the partial air cleaning device 1, the floor is not used as one of the guide plates 4, 5, and thus the cross-sectional shape of the guide plates 4, 5 may be a mouth shape, and between the air flow opening faces 23 Can have a console.

In the above-described embodiment, the present invention will be described by taking an open region between the opening surface 41 and the opening surface 51 as an example in which the upper surface and the both side surfaces are open. However, for example, as shown in FIG. The upper ends of the guide plates 4 and the guide plates 5 are joined to form an area in which only the two sides are open. In this case as well, the cleanliness of the region between the air flow opening faces 23 can be made higher than the cleanness of the region outside the local air cleaning device 1.

Further, the blow-out type exhaust hoods 2, 3 may have a structure in which a caster is attached to the bottom surface. In this case, the blow-out hoods 2, 3 can be easily moved. Further, an object having a shape in which a partition of a caster is attached, and a shape that can be freely connected to the blow-up hoods 2, 3 can be used as the guide plates 4 and 5, or The shape of the vinyl sheet is covered. In this case, the construction is easy to carry out, And the movement is also easy to carry out. Further, the guide plates 4 and 5 may be in the form of a vinyl house which is formed in a bellows shape and which is expandable and contractible in the flow direction of the air flow. In this case, the lengths of the guide plates 4 and 5 are easily changed, and the positions of the guide plates 4 and 5 and the positions of the guide plates 4 and 5, that is, the positions at which the clean spaces are obtained are also easily changed.

For example, in the case where a clean area is formed on the corner of the room, a part of the guide plates 4, 5 may be replaced by a side wall surface or a floor.

Further, when a part of the strip line is disposed in the clean space, a part of the line to be cleaned may be completely covered in a tunnel shape, and one of the surrounding lines may be blown out. The hood (2) is connected in series, and the other is in an open state (opening surface 41), and the other blowing hood 3 is disposed at a position opposite thereto. In such an example, the line is arranged along the wall, and may be used as a part of the guide 4 instead of the wall.

"Embodiment"

Hereinafter, the present invention will be described in further detail by exemplifying specific embodiments of the invention.

(Example 1)

The cleanness was measured with respect to the measurement positions 1 to 15 (the inside of the guide plates 4 and 5, the open area between the opening surface 41 and the opening surface 51) shown in Fig. 12 using the local air cleaning device 1 shown in Fig. 1 . In addition, FIG. 12 is a top view of the partial air cleaning device 1. The blow-out hoods 2 and 3 are nine blow-out hoods (length 3 and width 3) having a horizontal length of 1050 mm and a longitudinal length of 850 mm, and the air flow opening faces are in the same direction, and the blow-out row is arranged. The short sides of the windshield are connected to each other so that the long sides are individually connected to each other, and the size of the opening surface is 3150 mm in width and height. 2550mm. The measurement heights of the measurement positions 1 to 15 are set to positions at the height 1/2 of the blow-out type air hoods 2, 3. The cleanness was measured by using LASAIR-II manufactured by PMS Co., Ltd. to measure the number of dust (/CF) having a particle diameter of 0.3 μm. When the degree of cleanliness was 300/CF or less, it was evaluated as high-definition clarity. Further, the length b of the guide plates 4, 5 is set to 5 m; the interval X between the air flow opening face 23 of the blow-out type hood 2 and the air flow opening face 23 of the blow-out type hood 3 is set to 12 m; The flow rate of the uniform air flow was set to 0.2 m/s. Further, for reference, the cleanliness was also measured in the same manner for the measurement positions 16 to 18 outside the local air cleaning device 1. The results are shown in Table 1.

As shown in Table 1, it can be confirmed that the cleanliness of the inside of the guide 4, the inside of the guide 5, and the open area between the opening surface 41 and the opening surface 51 can be made larger by providing the guide plates 4 and 5. The area outside the local air purification device 1 is also high in purity.

(Examples 2 to 6)

The degree of cleanness was measured for the case where the flow rate of the purge-purified uniform air stream and the length b of the guide plates 4, 5 were changed as shown in FIG. At this time, the air flow opening face 23 of the blow-out type hood 2, and the blow-out type hood 3 The interval X between the air flow opening faces 23 is set to 12 m in the same manner as in the first embodiment. Further, in the first embodiment, it can be confirmed that the inside of the guide plates 4 and 5 has been cleaned. Therefore, in the second to sixth embodiments, the opening surface 41, the opening surface 51, and the opening surface 41 are as shown in FIG. The cleanliness was measured at the center of the opening surface 51 and at 7 points of the individual measurement points A to G. The results are shown in Tables 2 to 6. Further, the positions of the measurement points A and E are 15 cm lower side from the upper edge of the downstream side end portion of the guide plates 4 and 5, and 15 cm inside from the side edge of the downstream end portion of the guide plate. The position of the measurement point D is a position 15 cm below the center of the upper edge of the downstream side end portion of the guide plates 4 and 5. The positions of the measurement points B and F are the height between the upper edge and the lower edge of the downstream end portion of the guide plates 4 and 5, and the position from the side edge of the downstream end portion of the guide plate to the inner side of the airflow of 15 cm. The positions of the measurement points C and G are from the lower edge of the downstream side end portion of the guide plates 4 and 5 to the upper side of the guide plate of 15 cm, and the position from the side edge of the downstream end portion of the guide plate to the inner side of the air flow of 15 cm.

It can be confirmed that even if the flow rate of the purified uniform air flow and the length b of the guide plates 4 and 5 are changed as shown in Tables 2 to 6, the opening faces 41 and openings can be made by providing the guide plates 4 and 5. The cleanness of the open area between the surface 51 and the opening surface 41 and the opening surface 51 is higher than the cleanliness of the area outside the local air cleaning device 1. In Example 3, the time required to reach the aforementioned clean state was 62 seconds.

(Examples 7, 8)

In the seventh embodiment, except that the interval between the opening faces 41 and 51 is 3.5 m, the length b of the guide plates 4 and 5 is set to 3.25 m, and the air flow opening face 23 of the blow-out type hood 2 and the blow-out type are used. The degree of cleanness was measured in the same manner as in Example 3 except that the interval X between the air flow opening faces 23 of the hood 3 was set to 10 m. In the eighth embodiment, except that the interval between the opening faces 41 and 51 is set to 3.5 m, the interval X between the airflow opening face 23 of the blow-out type hood 2 and the airflow opening face 23 of the blow-out hood 3 is set. The cleanliness was measured in the same manner as in Example 3 except that the thickness was 8 m. The results are shown in Tables 7 and 8.

As shown in Tables 7 and 8, it can be confirmed that even if the interval X between the air flow opening face 23 of the blow-out hood 2 and the air flow opening face 23 of the blow-out hood 3 is changed, the guide can be provided. 4 and 5, the cleanliness of the open area between the opening surface 41, the opening surface 51, and the opening surface 41 and the opening surface 51 is made higher than the cleanliness of the area outside the local air cleaning device 1.

(Examples 9, 10)

In the ninth embodiment, in addition to the blow-out hoods 2, 3 shown in Fig. 10, a partial air purifying device composed of one blow-out hood is used. The degree of cleanness was measured in the same manner as in Example 3 except that the interval between the opening faces 41 and 51 was 1 m and the length b of the guide plates 4 and 5 was 5.5 m. In the tenth embodiment, except that the interval between the opening faces 41, 51 is set to 0.5 m, the length b of the guide plates 4, 5 is set to 5.75 m, and the flow rate of the purified uniform air flow is set to 0.2 m/s. The cleanliness was measured in the same manner as in Example 9 except for the above. Further, in the tenth embodiment, the clarity was measured only for the center of the opening surface 41 and the opening surface 51. The results are shown in Tables 9 and 10.

As shown in Tables 9 and 10, it can be confirmed that even when the blow-out type exhaust hoods 2, 3 shown in Fig. 10 are used as a partial air purifying device constituted by one blow-out type exhaust hood, By providing the guide plates 4 and 5, the cleanliness of the open area between the opening surface 41, the opening surface 51, and the opening surface 41 and the opening surface 51 can be made cleaner than the area outside the local air cleaning device 1. The degree is still high.

(Examples 11, 12)

In the eleventh embodiment, in the same manner as in the third embodiment, except that the local air cleaning device in which the guide 4 is provided in the blow-out type hood 2 is used as shown in Fig. 8, the length b of the guide 4 is set to 9 m. Determine the cleanliness. In Example 12, the cleanness was measured in the same manner as in Example 11 except that the length b of the guide 4 was 6.5 m. The measurement point is the same as that of the third embodiment. However, in the single side of the blow-off hood, the air flow opening surface of the blow-out hood 3 is used instead of the opening surface 51 to select the guide 5 as the case. Measuring point. The results are shown in Tables 11 and 12.

As shown in Tables 11 and 12, it can be confirmed that even when the partial air cleaning device in which the guide 4 is provided only in the blow-out hood 2 shown in Fig. 8, the guide 4 can be provided. The cleanness of the open area between the opening surface 41, the air flow opening surface 23 of the blow-through hood 3, and the air surface opening surface 23 of the blow-out hood 3 is made to be cleaner than the partial air cleaning. The area outside the device 1 is also clean.

(Examples 13, 14)

In the thirteenth embodiment, the local air cleaning device formed by expanding the opening surface 51 to be larger than the opening surface 41 as shown in FIG. 5 is used, and the interval between the opening faces 41 and 51 is set to 3 m. The cleanness was measured in the same manner as in Example 3 except that the length b of the guide 4 was changed to 4.5 m. In addition, at the measurement point at this time, the center and the opening surface 41 are the positions measured with respect to the guide plate of the opening surface 41, and the opening surface 51 measures the position based on the opening surface 51. In the fourteenth embodiment, the local air cleaning device formed by reducing the opening surface 51 to be smaller than the opening surface 41 as shown in Fig. 6 is used, and the interval between the opening faces 41 and 51 is set to 3 m. , the length b of the guide 4 is set to be 4.5 m, and is the same as in the third embodiment. The cleanliness was determined sample by plot. Further, at the measurement point at this time, the center and the opening surface 41 are measured with respect to the guide plate of the opening surface 41, and the opening surface 51 is measured with the opening surface 51 as a reference. The results are shown in Tables 13 and 14.

As shown in Tables 13 and 14, it can be confirmed that the local air cleaning device formed by expanding the opening surface 51 to be larger than the opening surface 41 as shown in FIG. The case of the partial air cleaning device formed by reducing the opening surface 51 to be smaller than the opening surface 41 as shown in FIG. 6 can also be provided by providing the guide plates 4 and 5. The cleanliness of the open area between the opening surface 41, the opening surface 51, and the opening surface 41 and the opening surface 51 is higher than that of the area outside the local air cleaning device 1.

(Example 15)

In the fifteenth embodiment, in addition to the use of the guide plate 4 as shown in FIG. 11 and the upper end portion of the guide plate 5 to be joined to form a partial air cleaning device having only two sides open, the length of the guide plate 4 is used. The degree of cleanness was measured in the same manner as in Example 3 except that b was set to 5 m and the flow rate was set to 0.2 m/s. The results are shown in Table 15.

As shown in Table 15, even in the case where the end portion of the upper surface of the guide plate 4 and the guide plate 5 as shown in Fig. 11 is connected to form a partial air cleaning device having only two side open areas, By providing the guide plates 4 and 5, the cleanliness of the open area between the opening surface 41, the opening surface 51, and the opening surface 41 and the opening surface 51 becomes lower than the cleanliness of the area outside the local air cleaning device 1. high.

(Examples 1, 16, and 17)

For the case of Example 1, the uniform air gas to be purified is measured. The flow rate of the flow was changed to 0.2 m/s, 0.3 m/s, and 0.5 m/s, respectively, and power consumption at the center of the opening surface. Further, from the first embodiment, the length b of the guide plate 4 was changed to 10 m (Example 16), 20 m (Example 17), and the flow rate of the purged uniform air flow was also changed to 0.2 m/s, respectively. In the case of 0.3 m/s, and 0.5 m/s, the power consumption and the noise at the center between the opening faces were measured in the same manner. The results are shown in Table 16.

As shown in Table 16, it can be confirmed that as the flow rate of the uniform air flow changes to 0.2 to 0.5 m/s, the power consumption also changes to 2124 to 7200 W. Moreover, the noise value changes to 0.2 to 0.5 m/s as the flow rate of the uniform air flow is changed to 59.0 to 75.0 dB (A) in the first embodiment, and becomes 56.0 to 70.4 dB (A) in the embodiment 16. In Example 17, it was changed to 55.4 to 69.1 dB (A). In this way, it can be confirmed that the power consumption and the noise value are also lowered by reducing the flow rate of the uniform air flow.

The present application is based on Japanese Patent Application No. 2011-152338, filed on Jul. 8, 2011, and Japanese Patent Application No. 2012-107029, filed on May 8, 2012. In the present specification, the specification, the scope of the patent application, and the drawings of Japanese Patent Application No. 2011-152338, and Japanese Patent Application No. 2012-107029 are incorporated by reference.

"The possibility of industrial use"

The invention can be effectively used for air cleaning in a local working space.

1‧‧‧Local air purification device

2, 2a, 3‧‧‧ blown out hood

4, 5‧‧‧ Guide

21‧‧‧ housing

22‧‧‧Air air intake

23‧‧‧Air blowing surface (air flow opening surface)

24‧‧‧Air supply agency

25‧‧‧High performance filter

26‧‧‧Rectifier

27‧‧‧Pre-filter

41, 51‧‧ ‧ open face

Fig. 1 is a view showing a partial air purifying apparatus according to an embodiment of the present invention.

Fig. 2 is a view showing the configuration of a blow-out type hood.

Fig. 3 is a view showing another example of the partial air purification device.

Fig. 4 is a view for explaining the flow direction of the purified uniform air flow.

Fig. 5 is a view showing another example of the partial air cleaning device.

Fig. 6 is a view showing another example of the partial air purification device.

Fig. 7 is a view showing another example of the partial air purifying device.

Fig. 8 is a view showing a partial air purifying apparatus of another embodiment.

Fig. 9 is a view showing a partial air purifying apparatus of another embodiment.

Fig. 10 is a view showing a partial air purifying apparatus of another embodiment.

Fig. 11 is a view showing a partial air purifying apparatus of another embodiment.

Fig. 12 is a view showing the measurement position of the first embodiment.

Fig. 13 is a view showing the conditions of Examples 2 to 6.

Fig. 14 is a view showing measurement positions of Examples 2 to 6.

1‧‧‧Local air purification device

2, 2a, 3‧‧‧ blown out hood

4, 5‧‧‧ Guide

23‧‧‧Air blowing surface (air flow opening surface)

41, 51‧‧ ‧ open face

Claims (7)

A partial air purification device comprising: a pair of blow-out type exhaust hoods having an air flow opening surface for blowing a purified uniform air flow; and a pair of guide plates that are coupled to the pair of blowers Each of the air venting openings of the hood is extended from the side of the air venting opening toward the downstream side of the uniform airflow and forms an opening at the downstream end; the pair of blown hoods are The individual air flow opening faces are arranged to face each other; the opening faces of the pair of guide plates are opposed to each other so as to face each other to form an open area between the opening faces of the guide plates; The cleaned uniform air air stream blown from the opening surface of the air air flow is collided in the open area to flow out of the open area, so that the inside of the guide plate and the open area become clean compared to the other The working area of the operator with a high degree of cleanliness; the distance between the open faces of the air flow is not higher than the open side of the air flow When set longer has the guide plate, and can be maintained at a high state of cleanliness in the work area so that the working area is enlarged. A partial air purification device comprising: a pair of blow-out type exhaust hoods having an air flow opening surface for blowing a purified uniform air flow; and a guide plate disposed on the pair of blow-out rows An air flow opening face side of one of the blower hoods of the air hood, and extending from the air air opening face side toward the downstream side of the uniform air flow and forming an opening face at the downstream side end; the pair of blow-out type The exhaust hood is based on the individual air gas The flow opening faces are disposed in an opposing manner; and the opening faces of the guide plates are opposed to the air flow opening faces of the blow-through hoods not provided with the guide plates, so as to be opposite to the guide plates Forming an open area between the open surface and the air flow opening surface of the blow-through hood not provided with the guide; by purging the purified uniform air flow blown from the opening surface of the individual air flow to the open area Internal collision and outflow to the outside of the open area, so that the inside of the guide plate and the open area become an operator's work area with a higher cleanliness than other areas; by making the air flow opening between the surfaces The distance is longer than when the guide plate is not provided on the air flow opening surface side, and the work area can be enlarged while maintaining the high-definition clarity in the work area. The partial air cleaning device of claim 1, wherein each of the opening faces of the guide plates has an approximately the same shape. The partial air cleaning device of claim 2, wherein the opening surface of the guide plate has an approximately the same shape as the air flow opening surface of the blow-through hood that is not provided with the guide plate. The partial air cleaning device according to any one of claims 1 to 4, wherein the opening surface of the guide plate has an approximately the same shape as the air flow opening surface of the blow-out hood to which the guide plate is attached. The partial air purification device according to any one of claims 1 to 4, wherein the pair of blow-out hoods are respectively connected to a plurality of blow-out hoods. The partial air purification device according to any one of claims 1 to 4, wherein a flow rate of the purified uniform air flow blown from the open surface of the air flow is 0.2 to 0.7 m/s.