TWI609158B - 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. .

Therefore, a local air cleaning device is proposed which is configured such that a blowing hood (clean air blowing device) capable of blowing a uniform airflow of cleaned air is disposed oppositely to the air flow opening surface. Further, the air flow from each of the air flow opening faces is collided, so that the region between the pair of blow-out hoods has a clean air space having a higher cleanliness than the other regions (Patent Document 1).

Prior Technical Literature Patent Literature

(Patent Document 1) JP-A-2008-275266

Summary of Invention

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. Further, there are cases where the construction is performed by a slightly simpler local air cleaning device. Therefore, it is expected to construct a simpler local air purification device.

The present invention has been made in view of the above problems, and it is an object of the invention to provide a local air purification apparatus having a simple structure.

In order to achieve the above object, a partial air purification device according to the present invention is characterized in that it is provided with a blow-out type exhaust hood having an air flow opening face for blowing a purified and purified uniform air flow, and a blow-out type exhaust hood provided to the aforementioned blow-out type exhaust hood a side of the air flow opening face side, a guide plate extending from the air flow opening face side toward the downstream side of the uniform air flow, and forming an opening face at the downstream side end portion; wherein the blow-through type exhaust hood is according to After the cleaned uniform air flow blown by the air flow opening surface passes through the inside of the guide plate, and then collides with the air collision surface on the downstream side of the opening surface of the guide plate; The opening surface is separated from the air collision surface so as to face each other, and an open area is formed between the opening surface of the guide plate and the air collision surface; and the cleaning is performed by the air blowing opening surface. a uniform air flow collides with the air collision surface and flows out to the aforementioned open area In addition, the cleanliness in the inner surface of the guide plate and the aforementioned open area is higher than that of the other areas.

Preferably, the opening surface of the guide plate and the air flow opening surface of the blow-through hood are approximately the same shape.

The blow-through hood is connected, for example, by a plurality of blow-out hoods.

The flow rate of the purified and purified uniform air stream blown from the opening face of the air flow is preferably 0.2 to 0.5 m/s.

The width of the opening surface of the guide plate is, for example, 2 m or more and less than 10 m. In this case, the distance between the opening surface of the guide plate and the air collision surface is preferably such that the uniform air flow blown from the opening surface collides with the air collision surface within 4 seconds.

The width of the opening surface of the guide plate is, for example, 1 m or more and less than 2 m. In this case, it is preferable that the distance between the opening surface of the guide plate and the air collision surface is such that the uniform air flow blown from the opening surface collides with the air collision surface within 3 seconds.

The width of the opening surface of the guide plate is, for example, 0.2 m or more and less than 1 m. In this case, the distance between the opening surface of the guide plate and the air collision surface is preferably a distance at which the uniform air flow blown from the opening surface collides with the air collision surface within 2 seconds.

Preferably, the air collision surface has a curved portion that is bent toward the guide plate side in the vicinity of a position facing the end surface of the opening surface of the guide plate.

In a local air purification device like this, Preferably, the width of the opening surface of the guide plate is, for example, 2 m or more and less than 10 m, and the opening surface of the guide plate collides with the air. The distance between the faces is preferably such that the uniform air flow blown from the open face collides with the air collision face within 6 seconds.

Further, the width of the opening surface of the guide plate is preferably, for example, 1 m or more and less than 2 m, and the distance between the opening surface of the guide plate and the air collision surface is preferably a uniform air blown from the opening surface. The airflow is the distance that hits the aforementioned air collision surface within 5 seconds.

Further, the width of the opening surface of the guide plate is preferably 0.2 m or more and less than 1 m, and the distance between the opening surface of the guide plate and the air collision surface is preferably from the opening surface. The blown uniform air flow is the distance that collides with the aforementioned air collision surface within 3 seconds.

According to the present invention, it is possible to provide a local air purification apparatus which is simple in construction.

"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 cleaning 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 blow-out hood 2 that is disposed to face the air collision surface W such as a wall or a partition plate, and is provided in the blow-out type. The guide plate 3 of the cover 2.

The blow-out type hood 2 may be any one having a mechanism for blowing out a cleaned and purified uniform air flow, and a blow-out type hood which is conventionally used in a push-pull type ventilator can be used as a basic structure and provided therein. The construction of the filter for cleaning.

The uniform airflow and the first-class system mentioned here are related to Lin Tailang. The "classification of the workshop" (air conditioning and the Institute of Health Engineering issued in 1982) is the same as the first-class meaning, which means that the uniform flow does not produce a large vortex flow. 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 hood 2 of the present embodiment, nine (three vertical x three horizontal) blow-through hoods are connected by a connecting means such that the air flow opening faces are in the same direction, and the blow-out type The short sides of the hood are arranged side by side with each other and the long sides are connected to each other. Here, the structure of the blow-through hood that is connected by the connecting device is basically the same, and the present embodiment will be described by describing the structure of one of the blow-out hoods 2a. The configuration of the blow-out hood 2 of the form. 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 type hood 2a is formed in a substantially rectangular parallelepiped shape, and an air-air suction surface 22 is formed on one surface thereof. 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, however, it may be, for example, 1050 mm. ×850mm.

The blow-out type exhaust hood 2 is disposed such that the air flow opening surface 23 faces the air collision surface W such as a wall. Here, when the air flow opening surface 23 is opposed to the air collision surface W, the blow-out hood 2 does not limit the air flow opening surface 23 to face the air collision surface W, for example, as shown in FIG. As shown in the figure, the air flow opening surface 23 and the air collision surface W of the blow-out type hood 2 are also in a state of being inclined. The inclination between the air flow opening surface 23 of the blow-out type hood 2 and the air collision surface W is preferably such that the angle formed by the air flow opening surface 23 and the air collision surface W is in the range of about 30 degrees.

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

The air blowing mechanism 24 is disposed on the air flow suction surface 22 side in the casing 21. The air blowing mechanism 24 is constituted by a fan or the like for blowing air. 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 a HEPA filter (High Efficiency Particulate Air Filter) and a ULPA filter (Ultra Low Penetration Air Filter) for filtering the obtained ambient air. A high-performance filter that meets the level of cleanliness, such as a filter. The high-performance filter 25 cleans the surrounding air obtained by the air blowing mechanism 24 into a desired washing and purifying operation. Clean air. 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 blowing surface 23. The rectifying mechanism 26 includes an air blocking member (not shown) which is formed of a press plate or a mesh material. The rectifying mechanism 26 corrects (rectifies) the blast air which is variably ventilated with respect to the entire air bleed surface 23 from the high-performance filter 25, and ventilates the air blowing surface 23 as a whole. The quantity becomes a uniform air flow (uniform air flow) without variation. The rectified uniform air flow is blown out from the air flow blowing 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 uniformly purified air stream is cleaned from the air flow The entire surface 23 is blown to the outside in a direction almost perpendicular to the air flow opening surface 23 of the blow-out hood 2a.

One end of the guide plate 3 is provided on the air flow opening face 23 side of the blow-out type hood 2 . Further, the guide plate 3 is provided on the air flow opening face 23, and from this point, extends from the air flow opening face 23 toward the downstream side of the blown uniform air flow, and covers the outer peripheral contour of the air flow opening face 23. The way of the ministry was formed. For example, in the case where the shape of the air flow opening face 23 is a quadrangle, the cross-sectional shape thereof 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 3 is not The shape of the word, for example, is formed in such a manner that the extension is formed in a square shape. The guide 3 is formed to have an open area with the other end (opening surface 31). Here, the opening surface 31 of the guide plate 3 means that the downstream end portion of the guide plate 3 which extends in a tunnel shape from the air flow opening surface 23 toward the downstream side of the uniformly blown air flow (between the open area) The end face of the periphery of the boundary of the boundary is the opening. For example, in the case where the floor is replaced as a part of the guide 3, the cross-sectional shape of the guide 3 is In the case of a shape, a hollow opening formed by a quadrangular shape formed by the downstream end portion of the guide plate 3 and the floor corresponds to the opening surface 31; and when the cross-sectional shape of the guide plate 3 is a square shape, the guide plate is used. The hollow-shaped opening of the quadrangular shape formed at the downstream end portion of 3 corresponds to the opening surface 31.

The guide plate 3 may be in a state in which the air flow blown from the opening surface 31 can be maintained in a cleaned uniform air flow from the air flow opening surface 23, and it can be formed of any material. Also, the guide 3 When the state of the uniform purified air flow from the air flow opening surface 23 is maintained, it is possible to completely cover the entire circumference of the uniform air flow, for example, a part of the hole may be cut into holes. Slit.

The guide plate 3 is disposed such that the opening surface 31 faces the air collision surface W. By arranging the opening surface 31 so as to face the air collision surface W, the air flow blown from the opening surface 31 collides with the air collision surface W. As shown in Fig. 4, in the case where the opening face 31 faces the wall, when the uniform air flow collides with the air collision face W, the behavior of changing to the almost vertical flow direction is displayed. By thus flowing, the air flow colliding with the air collision surface W flows out toward the outer side of the contact surface. As a result, a clean space can be obtained from the surface touched by the airflow to the end region of the opening surface 31.

Here, the opening surface 31 and the air collision surface W are opposed to each other: the opening surface 3 is not limited to face the air collision surface W, and for example, as shown in FIG. 3, the opening of the guide plate 3 is also included. The face 31 and the air collision face are in a state of being inclined. The air flow blown from the opening surface 31 may be in a state in which the air collision surface W is not touched from the front surface, and a clean space may be formed in a space surrounded by the dotted line in FIG. The angle formed by the opening surface 31 of the guide plate 3 and the air collision surface W is preferably in the range of about 30°.

The shape of the opening surface 31 is preferably such that it forms almost the same shape as the air flow opening surface 23. Since the opening surface 31 and the air flow opening surface 23 have almost the same shape, it is easy to maintain the state of the uniform air flow blown from the air flow opening surface 23 in the opening surface 31. However, the opening surface 31 and the air flow opening surface 23 may not have substantially the same shape. For example, as shown in FIGS. 5 and 6, the width of the opening surface 31 may be enlarged or reduced. The opening surface 31 and the air flow opening surface 23 have different shapes. Because in this case, the state of the uniform air flow can also be maintained. In the case where the width of the opening surface 31 is enlarged or reduced, the width (the width of the opening surface 31) / (the width of the air flow opening surface 23) is preferably 0.6 to 1.4, more preferably 0.8 to 1.2. By setting it in such a range, the state of the uniform air flow blown from the air-air opening surface 23 can be maintained in the opening surface 31.

In the case of the length b of the guide plate 3, an open area can be formed between the opening surface 31 of the guide plate 3 and the air collision surface W as long as the opening surface 31 is opposed to the air collision surface W. The length of the air flow opening face 23 and the air collision face W of the blow-out hood 2 and the flow rate of the uniform air flow blown from the air flow opening face 23 (the opening face 31) are preferable. The predetermined length is designed.

As will be described later, when the length b of the guide plate 3 is 12 m, when the width of the opening surface 31 is 2 m or more and less than 10 m, it is preferable to connect the opening surface 31 of the guide plate 3 and the air collision surface W. The distance (Xb) is set to be within 4 times the flow rate (the uniform air flow blown from the opening surface 31 is the distance that hits the air collision surface W within 4 seconds). Further, when the width of the opening surface 31 is 1 m or more and less than 2 m, it is preferably within three times the flow rate (the uniform air flow blown from the opening surface 31 hits the air collision surface within 3 seconds). W distance). Further, when the width of the opening surface 31 is 0.2 m or more and less than 1 m, it is preferably set to be within twice the flow rate (the uniform air flow blown from the opening surface 31 collides with the air within 2 seconds) The distance of the collision surface W). By setting such a distance, the region between the inside of the guide 3, the opening surface 31, and the air collision surface W can be made high-definition.

Here, the width (L) of the opening surface 31 is circular in the opening surface 31. In other words, it refers to the diameter of the circle as shown in Fig. 7(a). Further, the width (L) of the opening surface 31 is a case where the opening surface 31 is rectangular, and refers to the diameter of the largest inscribed circle as shown in Fig. 7 (b), that is, the length of the short side. Further, the width (L) of the opening surface 31 is a circular or polygonal shape on the opening surface 31, and refers to the diameter of the largest inscribed circle as shown in FIGS. 7(c) to 7(g). Further, the width (L) of the opening surface 31 is a shape including a concave portion on the opening surface, and refers to a diameter of an inscribed circle at which the distance from the opposite side as shown in FIG. 7(h) is the shortest. Further, the width (L) of the opening surface 31 is a concave shape on the opening surface, and refers to an inscribed circle in which the distance between the side having the concave portion and the opposite side is the shortest as shown in FIG. 7(i). The diameter.

As shown in FIG. 1, the guide plate 3 configured as described above is provided from the side of the air flow opening face 23 of the blow-out type hood 2 toward the downstream side of the uniform air flow (attached), so as to be disposed therein. The opening surface 31 of the downstream side end portion is disposed so as to face the air collision surface W. Thereby, an open region is formed between the opening surface 3 and the air collision surface W.

In the partial air purification device 1 configured as described above, the ambient air in the vicinity of the air flow suction surface 22 obtained by the air blowing mechanism 24 of the blow-out type hood 2 passes through the pre-filter 27 and the high performance filter. 25 and purify into the clean air of the desired cleansing level. Then, the cleaned purified air is rectified into a uniform air flow by the rectifying mechanism 26, and the cleaned uniform air flow is integrally blown from the air flow opening surface 23 to the guide 3.

Here, the flow rate of the purified uniform air flow blown from the air flow opening surface 23 is preferably 0.3 to 0.5 m/s; and the wind speed is reduced to 0.2 to 0.3 m/s when it is desired to suppress power consumption, The local air purification device 1 is contaminated, and if it is desired to quickly purify, the wind speed can be appropriately selected. Increase to 0.5~0.7m/s. When the purged uniform air flow blown from the air flow opening face 23 is pushed and moved in the guide 3, the uniform air flow is easily maintained in the guide 3 when the air flow is blown at the same flow rate. Further, when the flow rate is made slow, since the number of revolutions of the fan of the air blowing mechanism is suppressed, the noise value and power consumption can be suppressed. Accordingly, since the amount of blown air is reduced, the amount of dust deposited on 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 3, the flow rate of the uniform air flow is set to about 0.5 m/s, which can be set to 0.2 m/r. than the flow rate of the uniform air flow. In the case of s, contaminants in the open area formed in the guide 3 and between the guide 3 and the air collision surface W are more quickly eliminated. Thus, depending on the intended use, the flow rate of the uniform air flow can be freely set. Further, when the wind speed of the uniform air flow blown from the air flow opening surface 23 is excessively increased, a vortex portion is generated, and when the uniform air flow is blown from the opening surface 31, the turbulent flow is rolled up, and it is likely that the vortex will be opened outside the open area. The contaminants are drawn into the open area formed between the guide 3 and the air collision face W. Therefore, it is preferable that the wind speed of the uniform air flow blown from the air flow opening face 23 is such that the wind speed does not occur.

The cleaned uniform air flow blown by the guide plate 3 is continuously blown out from the opening face 31 through the guide plate 3 while maintaining a uniform air flow. The air flow blown from the opening surface 31 collides with the air collision surface W. The colliding air flow then flows out of the open area formed between the guide 3 and the air collision surface W (outside the local air cleaning device 1). As a result, the cleanliness of the region between the air flow opening surface 23 and the air collision surface W (the inner portion of the guide 3 and the open region between the opening surface 31 and the air collision surface W) can be improved compared to the local air purification device. The cleanliness of the area outside 1 is also high.

Here, the present invention is compared with the local air purification device described in Patent Document 1. At the time of comparison, the size of the air flow opening surface of the blow-out hood of the two devices is set to be 1050 mm in length × 850 mm in length, and nine of the blown-out hoods (three in length × three in width) are connected to each other. The state together. Further, the flow rate of the purified and purified uniform air flow blown from the opening face of the air flow was set to 0.5 m/s. In this case, it is confirmed that the upper limit of the distance between the air flow opening faces 23 of the cleaned space is about 5.5 m in the partial air cleaning device described in Patent Document 1. On the other hand, in the local air purification device 1 of the present invention, it is confirmed that the distance between the air flow opening surface 23 and the air collision surface W of the purified space is about 20 m. Thus, the local air purification device 1 of the present invention has a simple structure and can form a vast amount of clean air space.

Moreover, when the present invention is compared with the open type 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 hood of the same area is the same even if the wind speed is the same. A considerable amount of clean space can be obtained, and since the device is not required on both sides, even if the power consumption of the blow-out hood 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. Moreover, since the wind speed can be reduced, the noise generated by the operation of the local air cleaning device can be reduced, and since the amount of air passing through the filter is reduced, it can be reduced below the filter for obtaining clean air. The amount of dust can also suppress its consumption. Further, Patent Document 1 is set under the aforementioned conditions In the case of the open partial air purification device, it was confirmed that the power consumption was 7200 W and the noise value at the center between the opposing air flow opening faces 23 was 75 dB (A). On the other hand, when the present invention (the distance between the air flow opening surface 23 and the air collision surface W of 20 m) is set under the above-described installation conditions, it can be confirmed that the power consumption is 3600 W, the air flow opening surface 23, and the air collision surface W. The noise value at the center is the same level as 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 consumed for purification per cubic meter is about 160 W. On the other hand, in the space of about 160 m ^ 3 cleaned by the present invention, it was confirmed that the electric power required for purification and purification per cubic meter was about 22.5 W. Further, in the above-described present invention, the distance between the air flow opening surface 23 and the air collision surface W is set to 20 m. However, when the distance is increased, the power consumption per unit volume can be reduced. .

In addition, in the general clean room, the construction work is not easy in order to clean the entire house. However, in the partial air cleaning device 1 of the present embodiment, the blow-out type hood 2 can be easily moved. Further, as long as it does not affect the range of the uniform air flow, the guide 3 provided on the blow-off hood 2 may be bent according to the operation, or may be composed of the opening surface of the guide and the air collision surface. The open area is moved to an arbitrary position, etc., so the configuration of the work area can be 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 of the clean air blowing device is extended, and the operator's work area is also extended. do not change. However, in the local air purification device 1, Since the horizontal flow is used, the area inside the guide 3 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 parts, and the manufacturing machine to enter and exit in the general clean room, there is no clear space area caused by opening the doors. The cleanliness is reduced, so you can go in and out of the open area at any time, or parts can come in and out. In a general clean room, when the clean room is contaminated, the polluted air in the clean room is diluted by the clean air supplied to the clean room, and the clean room is slowly cleaned by the exhaust. Therefore, it takes several hours to clean it in the clean room. However, in the present invention, even if it is assumed that the inside of the guide plate 3 and the open area are contaminated, the cleaned uniform air flow blown from the opening face of the air flow is used to extrude the polluted air from the guide plate to the outside of the guide plate. For this reason, it is possible to purify the air in a very short time.

Further, in a general clean room, the clean air supplied to the clean room is discharged from the exhaust port provided in the clean room, or is discharged between the small gap formed between the wall surface of the clean room and the floor. This is because the gap between the gaps is minimized in a general clean room, and the clean room is pressurized to prevent external polluted air from entering. However, in the present invention, as in the case where the clean air is discharged from the fine gap of the clean room as described above, the wide open area is actively formed, so that the space formed by the cleaning can be cleaned. Therefore, the open area can be used as a cleaned area and used for an entrance or the like as described above.

As described above, according to the local air cleaning device of the present embodiment, the blow-out type hood 2 provided with the guide 3 and the air collision surface W are Arranged in a facing manner, the cleanliness of the interior of the guide 3 and the open area between the open surface 31 and the air collision surface W can be made higher than the cleanliness of the area outside the local air cleaning apparatus 1. Thus, the present invention can provide a local air purification device 1 which is simple in construction.

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 shape of the guide 3 provided in the blow-out hood 2 is designed to extend from the air flow opening surface 23 of the blow-out hood 2 to the opening surface 31 of the guide plate. The present invention will be described by way of an example. However, as shown in FIG. 8, for example, as long as it is maintained in a state of a uniform air flow, it may be curved. In this case, the cleanliness of the open area between the inside of the guide 3, the opening surface 31 and the air collision surface W can also be higher than the cleanliness of the area outside the local air cleaning device 1, thereby providing A simple local air purification device 1 is constructed.

In the above-described embodiment, the present invention will be described by exemplifying a case where the blowing hood 2 is connected to each of the nine (three vertical × three horizontal) blowing hoods 2 a via a connecting tool. However, the number of the blow-through hoods 2a constituting the blow-out type hood 2 may be 10 or more, or may be eight or less. For example, the blow-out type hood 2 may be formed by connecting four (two vertical x two horizontal) blow-out hoods 2a via a connecting device. In the case where the air outlet hood 2a is connected as described above, the air flow opening faces of the blow-out hood 2a are arranged in the same direction, and the short sides and the long sides of the blow-out hood 2a are respectively different from each other. The way the edges are connected is arranged. At this time, the mutual blow-out hood 2a is preferably: edge to edge The side surface, the upper surface, or both of the surfaces of the blow-off hood 2a to be connected are connected in an airtight state, or the side surface, the upper and lower surfaces, or both sides of the blow-out hood 2a that are connected to each other It is connected in an airtight state with a sealing material such as a packaging material. Further, as shown in FIG. 9, the blow-out type hood 2 may be constituted by one blow-out type hood 2a. In these cases, the cleanliness of the open area between the inside of the guide 3, the opening surface 31, and the air collision surface W can be made higher than the cleanliness of the area outside the local air cleaning apparatus 1. Thereby, it is possible to provide the local air purification device 1 which is simpler in construction. Further, the local air cleaning device 1 may be one surface that does not use the floor as the guide 3, and the cross-sectional shape of the guide 3 may be designed in a square shape.

In the above-described embodiment, the present invention will be described by taking an example in which the open area between the opening surface 31 and the air collision surface W is opened and the both side surfaces thereof are open. However, for example, as shown in FIG. Alternatively, the end portion of the upper surface of the guide plate 3 may be coupled to the air collision surface W so that only the side surfaces are open. In this case, the cleanliness of the area between the air flow opening surface 23 and the air collision surface W can also be higher than that of the area outside the local air cleaning device 1, thereby providing a simple local air. Cleaning device 1.

In the above-described embodiment, the present invention will be described by taking a case where the air collision surface W is a flat plate such as a wall or a partition plate. However, the air collision surface W is not limited to a flat plate shape. For example, the air collision surface W is preferably an end portion of the air collision surface W in the vicinity of the end portion of the opening surface 31 of the guide plate 3, for example, as shown in FIG. The side portion of W has a curved portion W1 that is curved toward the side of the guide 3 (the blow-out hood 2). Moreover, the air collision surface W may have an upper portion, a lower portion, and And a curved portion W1 in which all the side portions of the guide sheets 3 are curved. Further, the curved portion W1 can also round the square corner (adding an arc) as if it has a rounded curved surface. When the air collision surface W has the curved portion W1 as described above, it is easy to prevent the outside from the open region formed between the guide plate 3 and the air collision surface W (outside the local air cleaning device 1). The inflow of air. Therefore, the cleanliness of the region between the airflow opening surface 23 and the air collision surface W (the interior of the guide 3 and the open region between the opening surface 31 and the air collision surface W) can be made higher than that of the local air purification device. The area other than 1 has a high degree of cleanness; further, a local air purification device 1 having a simple structure can be provided. Further, since the distance between the opening surface 31 and the air collision surface W and the shortest distance between the end portion of the opening surface 31 and the curved portion W1 are increased, a larger clear air space can be further formed.

Further, the blow-out type air hood 2 may have a structure in which a caster is attached to the bottom surface. In this case, the blow-out hood 2 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-out hood 2 can be used as the guide 3, or a plastic can be coated thereon. The form of a vinyl sheet. In this case, the construction can be easily performed, and the movement can be easily performed. Further, the guide plate 3 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 length of the guide 3 is easily changed, and the position of the guide 3, that is, the position at which the guide 3 is obtained, that is, the position at which the clean space is obtained is easily changed.

For example, in the case where a clean area is formed on the corner of the room, a part of the guide 3 may be replaced by a side wall surface or a floor.

Further, a part of the conveyor line line is disposed in the clean space In other cases, a part of the line to be cleaned may be completely covered in a tunnel shape, and one of the surrounding lines may be connected to the blow-out hood 2, and the other side may be open (opening surface). 31) The air collision surface W is disposed at the position opposite thereto. In such an example, the line is arranged along the wall, and may be used as a part of the guide 3 instead of the wall.

"Embodiment"

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

(Example 1)

The cleanness was measured with respect to the measurement positions 1 to 15 (the inside of the guide 3, the open area between the opening 31 and the air collision surface W) as shown in Fig. 12 by 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 type hood 2 is composed of nine (3 vertical × 3 horizontal) vertical cross-length 1050 mm and longitudinal length 850 mm, and the blow-out type hood 2a has the air flow opening surface in the same direction, and the blow-out hood 2a The short sides and the long sides are connected to each other so as to be connected to each other side by side, and the size of the opening surface 31 is 3150 mm in width and 2550 mm in height. The measurement heights at the measurement positions 1 to 15 are set to be 1/2 of the height of the blow-out type hood 2 . The cleanness was measured by using LASAIR-II manufactured by PMS Co., Ltd., and the number of dust having a particle diameter of 0.3 μm (unit/CF) was measured. When the cleanliness is 300/CF or less, it is evaluated as high-definition clarity. Further, the length b of the guide 3 is 10 m, and the interval X between the air flow opening surface 23 and the air collision surface W of the blow-out hood 2 is 12 m, and the flow rate of the purified uniform air flow is 0.5 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. Result In Table 1.

As shown in Table 1, it can be confirmed that the inside of the guide plate 3 and the opening surface 31 can be arranged by arranging the blowing type hood 2 provided with the guide 3 so as to face the air collision surface W. The cleanness of the open area between the air collision faces W is higher than the cleanliness of the area other than the local air cleaning device 1. It can be confirmed that the power consumption value at this time is 3600 W, and the noise value is 75 dB (A) at the center of the air flow opening face 23 and the air collision face W. It can be confirmed that it is possible to provide a local air purification device 1 having a simple structure.

(Examples 2 to 10)

Using the partial air cleaning device 1 shown in FIG. 1, the flow rate of the purified uniform air flow, the length b of the guide 3, and the air flow of the blow-out hood 2 are changed as shown in FIG. The degree of cleanness was measured in the case of the interval X between the opening surface 23 and the air collision surface W. Further, in the first embodiment, since it is confirmed that the inside of the guide 3 has been cleaned, in the second to tenth embodiments, the opening surface 31 and the air collision surface as shown in FIG. W is measured at a position separated by 15 cm from the opening surface 31 side, and at the center of the opening surface 31 and the air collision surface W, and at 7 points of the individual measurement points A to G. The results are shown in Tables 2 to 10. Further, the positions of the measurement points A and E are 15 cm below the upper edge of the downstream side end portion of the guide plate 3 or the like and 15 cm from the side edge of the downstream end portion of the guide plate to the inner side of the air flow. 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 3 or the like. 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 plate 3 or the like, 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. The positions of the measurement points C and G are from the lower edge of the downstream end portion of the guide plate 3 or the like to the upper side of the guide plate 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. Further, the measurement points A to G on the air collision surface W side are positions 15 cm from the air collision surface W to the upstream side of the air flow.

As shown in Tables 2 to 10, it can be confirmed that even if the flow rate of the purified uniform air flow, the length b of the guide 3, and the air flow opening face 23 and the air collision face W of the blow-out hood 2 are changed At the interval X, the cleanliness of the open region between the inside of the guide 3, the opening face 31, and the air collision face W may be higher than the cleanness of the region outside the local air cleaning device 1. Further, it can be confirmed that the power consumption at this time is 1062 to 3600 W, and the noise value is 59 to 75 dB (A) at the center of the air flow opening surface 23 and the air collision surface W.

(Examples 11 to 19, Reference Examples 1 to 9)

The partial air cleaning device 1 (the blow-out type hood 2a having a width of 1050 mm and a length of 850 mm: 3 vertical × 3 horizontal = 9) is used as shown in Fig. 1, and the guide 3 is as shown in Fig. 15 The length b is set to 12 m, and the cleanness is measured for changing the flow rate of the cleaned uniform air flow and the distance (Xb) between the opening surface 31 of the guide 3 and the air collision surface W (Examples 11 to 13, reference) Example 1~3). In addition, the local air cleaning device 1 (one blower type hood 2a having a width of 1050 mm and a length of 850 mm) was used as shown in Fig. 9, and the cleanliness was measured in the same manner (Examples 14 to 16 and Reference Examples 4 to 6). ). Further, the local air purification device 1 (the blower type hood 2a of the horizontal 1050 mm and the longitudinal direction of 850 mm: two vertical × two horizontal = four) was used, and the cleanliness was measured in the same manner (Examples 17 to 19, reference) Example 7~9). In addition, the degree of cleanness was obtained by measuring the number of dusts having a particle diameter of 0.3 μm (number/CF) using LASAIR-II manufactured by PMS Co., Ltd., and the case of 300/CF or less was evaluated as high-definition clarity (determined as ○).

As shown in Fig. 15, it can be confirmed that the cleaning can be improved by increasing the flow rate of the purified uniform air flow, increasing the number of the blow-out hood 2a, and increasing the width of the opening 31 (the length of the short side). The distance between the opening face 31 and the air collision face W. Specifically, it can be confirmed that the distance (Xb) between the opening surface 31 of the guide plate 3 and the air collision surface W is set to be nine in the number of the blow-out type air hoods 2a (the width of the opening surface 31 is 2650 mm). The case is within 3 to 4 times the flow rate (the uniform air flow blown from the opening surface 31 is the distance from the air collision surface W within 3 to 4 seconds), and the inside and the opening of the guide 3 can be obtained. The open area between the face 31 and the air collision face W is a high-definition clarity of 300/CF or less. Further, by setting the number of the blow-out hoods 2a to four (the width of the opening surface 31 is 1700 mm) to be within 2.4 to 3 times the flow rate (the uniform air flow blown from the opening surface 31) In order to collide with the air collision surface within 2.4~3 seconds In the case where the number of the blow-out hoods 2a is one (the width of the opening surface 31 is 850 mm), the flow rate is set to be 1.6 to 2 times the flow rate (the uniform air flow blown from the opening surface 31 is The distance between the inside of the guide 3, the opening surface 31, and the air collision surface W is 300/CF or less in the high-definition clarity of the air collision surface W within 1.6 to 2 seconds.

In the present embodiment and the reference example, the case of 300/CF or less is evaluated as the high-definition clarity. However, for example, even 1000/CF or less is sufficient to evaluate the high-definition clarity. In this case, when the width of the opening surface is 2 m or more and less than 10 m, the distance (Xb) between the opening surface 31 of the guide plate 3 and the air collision surface W is set to be within 4 times the flow rate (from The uniform air flow blown by the opening surface 31 is a distance that collides with the air collision surface W within 4 seconds, so that the open area between the inside of the guide 3, the opening surface 31, and the air collision surface W can be made high-definition. In addition, it is confirmed that the width of the opening surface is 1 m or more and less than 2 m, and the distance is three times the flow rate (the uniform air flow blown from the opening surface 31 hits the air collision surface within 3 seconds). When the width of the opening surface is 0.2 m or more and less than 1 m, it is set to be twice the flow rate (the uniform air flow blown from the opening surface 31 is the distance from the air collision surface W within 2 seconds) The open area between the inside of the guide 3, the opening face 31, and the air collision face W can be made high-definition.

(Examples 20, 21, Reference Examples 10, 11)

A partial air cleaning device 1 having a curved portion W1 bent toward the side of the guide plate 3 (the blow-out hood 2) on the side of the air collision surface W as shown in FIG. 16 (horizontal length 1050 mm, length 850 mm) is used. Blow-out hood 2a: vertical 3 × horizontal 3 = 9), as shown in Fig. 17, the length b of the guide 3 is set to 12 m, and the flow rate of the cleaned uniform air flow is 0.5 m/s (Example 20, Reference Example 10), 0.2 m/s (Example 21, Reference Example 11), and the distance (Xb) of the opening surface 31 of the guide 3 and the air collision surface W are changed. The situation is to determine the cleanliness. In addition, the degree of cleaning was LASAIR-II manufactured by PMS Co., Ltd., and the number of dusts having a particle diameter of 0.3 μm (number/CF) was measured. Further, in the same manner as in the second to tenth embodiments, the opening surface 31 of FIG. 14 , the position separated by 15 cm from the air collision surface W to the opening surface 31 side, and the center of the opening surface 31 and the air collision surface W, and individual measurement points A The cleanness was measured at 7 points of ~G. The results are shown in Tables 11 to 14.

As shown in the eleventh embodiment, the reference example 1, the embodiment 20, and the reference example 10, it is confirmed that the side portion of the air collision surface W has a curved portion that is curved toward the side of the guide plate 3 (the blow-out type hood 2). In W1, the distance between the cleaned open surface 31 and the air collision surface W can be increased from 1.5 m to 2 m, and the shortest distance c between the end of the open surface 31 and the curved portion W1 is also increased to 1.93 m. Further, as shown in the thirteenth embodiment, the third embodiment, the second embodiment, and the reference example 11, it is confirmed that the curved portion W1 which is curved toward the side of the guide plate 3 is provided on the side portion of the air collision surface W, so that the cleaning can be performed. The distance between the opening face 31 and the air collision face W is increased from 0.8 m to 1.2 m, and the end of the opening face 31 and the bending The shortest distance c of the part W1 also increases to 1.16 m. In this way, it can be confirmed that the partial air cleaning device 1 having a simple structure can be provided by providing the curved portion W1 which is curved toward the side of the guide plate 3 at the side portion of the air collision surface W, and can further form a wider clean. Air space.

In this way, it can be confirmed that in the local air cleaning device 1 (the number of the blow-out hoods 2a is 9 (the width of the opening surface 31 is 2650 mm)) using the air collision surface W having the curved portion W1, The distance (Xb) between the opening surface 31 of the guide plate 3 and the air collision surface W is set to be within 6 times of the flow velocity (the uniform air flow blown from the opening surface 31 is the distance that collides with the air collision surface W within 6 seconds. ), you can get 300 / CF or less Cleanliness.

Moreover, the local air cleaning device 1 using the air collision surface W having the curved portion W1 is set to have a flow velocity by the number of the blow-out hoods 2a (the width of the opening surface 31 is 1700 mm). Within 5 times of the distance (the uniform air flow blown from the opening surface 31 is the distance that hits the air collision surface W within 5 seconds), and the number of the blow-out type exhaust hoods 2a is one (the width of the open surface 31 is The case of 850 mm) is set to be within 3 times of the flow rate (the uniform air flow blown from the opening surface 31 is the distance from the air collision surface W within 3 seconds), and the high-definition clarity of 300/CF or less can be obtained. .

The present application is based on Japanese Patent Application No. 2011-166316, filed on July 29, 2011, and Japanese Patent Application No. 2011-196726, filed on Sep. 9, 2011, and Japanese Patent Application No. 2011-222785 of the Japanese Patent Application No. 2011-222785. The specification of the Japanese Patent Application No. 2011-166316, the Japanese Patent Application No. 2011-196726, and the Japanese Patent Application No. 2011-222785, the entire disclosure of which is incorporated herein by reference.

"The possibility of industrial use"

The invention is useful for air cleaning systems in local work spaces.

1‧‧‧Local air purification device

2, 2a‧‧‧ blow-out hood

3‧‧‧ 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

31‧‧‧Open face

L‧‧‧The width of the open face

W‧‧‧Air collision surface

Fig. 1 is a partial air purification 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.

7(a) to (i) are views for explaining the width of the opening surface of the guide.

Fig. 8 is a view showing a partial air cleaning device according to another embodiment.

Fig. 9 is a view showing a partial air purification device according to another embodiment.

Fig. 10 is a view showing a partial air cleaning device according to another embodiment.

Fig. 11 is a view showing a partial air purification device according to 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 10.

Fig. 14 is a view showing measurement positions of Examples 2 to 10.

Fig. 15 is a view showing the conditions of Examples 11 to 19 and Reference Examples 1 to 9.

Fig. 16 is a view showing the partial air cleaning device and the measurement position of Examples 20 and 21 and Reference Examples 10 and 11.

17 is a partial empty view showing Embodiments 20 and 21 and Reference Examples 10 and 11. A diagram of the gas purification device and conditions.

1‧‧‧Local air purification device

2‧‧‧Blowout hood

2a‧‧‧Blowout hood

3‧‧‧ Guide

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

31‧‧‧Open face

W‧‧‧Air collision surface

Claims (11)

A partial air purification device comprising: a blow-out type exhaust hood having an air flow opening surface for blowing a purified uniform air flow; and a guide plate disposed on the air of the blow-through hood The air flow opening surface side extends from the air air opening surface side toward the downstream side of the uniform air flow and forms an opening surface at the downstream side end portion; the blow-through type air hood is configured to be blown from the air air opening surface After the cleaned uniform air flow passes through the guide plate, and then collides with the air collision surface on the downstream side of the opening surface of the guide plate; the aforementioned open surface of the guide plate is from the air The collision surface is partitioned so as to face each other, and an open area is formed between the opening surface of the guide plate and the air collision surface; the purified air stream blown from the air air opening surface collides with the air The collision surface flows out of the open area, so that the inside of the guide plate and the open area become cleaner than other areas. The working area of the operator having a high degree of clarity; by making the distance between the opening faces of the air flowes longer than when the air guide opening side is not provided with the guides, it is possible to maintain the working area The work area is enlarged in the state of high-definition clarity. The partial air cleaning device of claim 1, wherein the opening surface of the guide plate and the air flow opening surface of the blow-through hood are approximately the same shape. The partial air purifying device of claim 1 or 2, wherein the blow-through hood is formed by joining a plurality of blow-out hoods. The partial air purification device according to claim 1 or 2, wherein the flow rate of the purified uniform air flow blown from the open surface of the air flow is 0.2 to 0.5 m/s. The partial air cleaning device according to claim 1 or 2, wherein the width of the opening surface of the guide plate is 2 m or more and less than 10 m; and the distance between the opening surface of the guide plate and the air collision surface is such that The uniform air flow blown by the opening surface can collide with the distance of the air collision surface within 4 seconds. The partial air cleaning device according to claim 1 or 2, wherein the width of the opening surface of the guide plate is 1 m or more and less than 2 m; and the distance between the opening surface of the guide plate and the air collision surface is such that The uniform air flow blown by the opening surface can collide with the distance of the air collision surface within 3 seconds. The partial air cleaning device according to claim 1 or 2, wherein a width of the opening surface of the guide plate is 0.2 m or more and less than 1 m; and a distance between the opening surface of the guide plate and the air collision surface is The uniform air flow blown from the opening face can collide with the distance of the air collision face within 2 seconds. The partial air cleaning device according to claim 1 or 2, wherein the air collision surface has a curvature that is curved toward the side of the guide plate at a position facing the end portion of the opening surface of the guide plate. unit. The partial air cleaning device of claim 8, wherein the width of the opening surface of the guide plate is 2 m or more and less than 10 m; and the distance between the opening surface of the guide plate and the air collision surface is from the opening The uniform air flow blown from the surface can collide with the aforementioned air collision surface within 6 seconds. The partial air cleaning device of claim 8, wherein the width of the opening surface of the guide plate is 1 m or more and less than 2 m; and the distance between the opening surface of the guide plate and the air collision surface is from the opening The uniform air flow blown from the surface can collide with the aforementioned air collision surface within 5 seconds. The partial air cleaning device of claim 8, wherein the width of the opening surface of the guide plate is 0.2 m or more and less than 1 m; and the distance between the opening surface of the guide plate and the air collision surface is from the foregoing The uniform air flow blown from the open surface can collide with the aforementioned air collision surface within 3 seconds.