Exhaust system

Abstract

An exhaust device that draws in polluted air and exhausts it to the outside is disclosed, the disclosed exhaust device includes a housing having an intake port and a plurality of exhaust ports, a guide means provided inside the housing for guiding air flowing into the inside of the housing through the intake port, and an exhaust means directly or indirectly connected to the plurality of exhaust ports, the plurality of exhaust ports including a first exhaust port arranged at a position corresponding to the center of the intake port, and a plurality of second exhaust ports spaced from the first exhaust port and distributed on the rear wall of the housing, the guide means including a plurality of guide plates arranged between the front wall and the rear wall of the housing, the plurality of guide plates being arranged concentrically with the intake port around the central axis of the intake port, each having a ring shape or a circular arc shape, the inner radius of the plurality of guide plates being smaller than the inner radius of the intake port and larger than the inner radius of the first exhaust port, and gradually decreasing from the intake port toward the first exhaust port.

Description

[Technical field]

[0001] The present invention relates to an exhaust device that draws in polluted air and exhausts it to the outside, and more particularly, to an exhaust device that can improve exhaust efficiency. [Background technology]

[0002] Generally, exhaust systems are installed in factories or homes where pollutants such as bad odors, harmful gases, soot, and dust are generated, or in restaurant kitchens, and are used to suck in air containing such pollutants (hereinafter referred to as "polluted air") and release it outside.

[0003] In conventional exhaust systems used for such purposes, the efficiency of the exhaust system for sucking in and discharging polluted air decreases rapidly as the distance between the pollution source and the exhaust system increases, and the exhaust system's efficiency also decreases when the pollution source is located in a wide open space.

[0004] Therefore, in order to improve exhaust efficiency, it is desirable to provide the exhaust device as close as possible to the pollution source and to isolate the pollution source from the surrounding space.

[0005] However, there are many cases where it is difficult to install an exhaust device close to a pollution source or to isolate the pollution source from the surrounding space. In such cases, there was a problem that conventional exhaust devices could not achieve satisfactory exhaust efficiency.

[0006] In the past, in order to solve these problems, an exhaust fan with a capacity larger than necessary was used to increase the amount of polluted air drawn in. However, this resulted in excessive noise, high installation and operating costs, and reduced economic efficiency, as well as still being unable to achieve satisfactory exhaust efficiency.

[0007] Recently, such conventional local exhaust systems generally include a swallow located near the exhaust pipe inlet to generate a vortex. The air flow generated by the rotation of the swallow generates a vortex around the exhaust flow of polluted air that rises from the pollution source along the central axis of the swallow's rotation toward the exhaust pipe inlet. The vortex thus generated acts as an air curtain that blocks the pollution source from the surrounding space, thereby allowing the polluted air to be more efficiently sucked into the exhaust pipe.

[0008] Korean Patent No. 10-1606862 discloses an exhaust device having a swallow that creates a vortex and a guide member that expands the air curtain created by the vortex in a vertical direction. The exhaust device has an advantage that it can more easily and efficiently take in polluted air that is relatively far away from the polluted air intake port and exhaust it to the outside, improving exhaust efficiency.

[0009] However, the exhaust device must be equipped with a swallow having many blades to form a vortex, a separate motor to rotate the swallow, and a guide member having a somewhat complicated structure to guide the vortex, which makes the device heavy, complicates the configuration, and increases the manufacturing cost.In addition, the exhaust device is difficult to miniaturize due to its complicated configuration, and is difficult to install in the kitchen of a home or a restaurant. Summary of the Invention [Problem to be solved by the invention]

[0010] The present invention has been created to solve the above-mentioned problems in the conventional art, and has an object to provide an exhaust device that can improve exhaust efficiency while having a relatively simple structure. [Means for solving the problem]

[0011] In order to achieve the above technical objectives, an exhaust device according to an embodiment of the present invention includes a housing including a front wall having an air inlet formed therein, and a rear wall arranged opposite the front wall and having a plurality of air outlets formed therein; a guide means provided inside the housing for guiding air flowing into the housing through the air inlet; and an exhaust means directly or indirectly connected to the plurality of air outlets for discharging the air flowing into the housing to the outside of the housing through the plurality of air outlets, the plurality of air outlets being a first exhaust means arranged at a position corresponding to a center of the air inlet. the housing includes an air inlet, and a plurality of second exhaust ports spaced from the first exhaust port and distributed around the rear wall of the housing, the guide means including a plurality of guide plates spaced apart from each other on the central axis side of the air inlet and arranged parallel to the front wall between the front and rear walls of the housing, the plurality of guide plates being arranged concentrically around the central axis of the air inlet, each having a ring shape or an arc shape, the inner radii of the plurality of guide plates being smaller than the inner radius of the air inlet and larger than the inner radius of the first exhaust port, and gradually decreasing from the air inlet to the first exhaust port.

[0012] According to an embodiment of the present invention, the outer radii of the plurality of guide plates gradually decrease moving from the intake port toward the first exhaust port, and the outer radius of the guide plate closest to the front wall of the housing is greater than the inner radius of the intake port.

[0013] According to an embodiment of the present invention, the guide plates may be fixedly disposed inside the housing by being fixed to a side wall or a rear wall of the housing.

[0014] According to an embodiment of the present invention, each of the guide plates has a fixing lug, and can be fixed to the side wall or the rear wall of the housing via the lug.

[0015] According to an embodiment of the present invention, the housing may have a rectangular parallelepiped or cylindrical shape.

[0016] According to one embodiment of the present invention, the exhaust device further includes an exhaust box coupled to a rear side of the housing and surrounding the multiple exhaust ports, and at least one common exhaust port is formed on a rear wall of the exhaust box for discharging air flowing into the exhaust box through the multiple exhaust ports to the outside of the exhaust box, and at least one exhaust pipe may be connected to the at least one common exhaust port as the exhaust means.

[0017] According to another embodiment of the present invention, the exhaust device further includes an exhaust box coupled to a back side of the housing and surrounding the multiple exhaust ports, and the exhaust box has a height lower than that of the housing, and thus a side wall of the exhaust box forming a step between the side wall and a corresponding side wall of the housing is formed with at least one common exhaust port for discharging air flowing into the exhaust box through the multiple exhaust ports to the outside of the exhaust box, and at least one exhaust fan is provided in the at least one common exhaust port as the exhaust means, and at least one additional exhaust port is formed in a side wall of the housing corresponding to the side wall of the exhaust box in which the common exhaust port is formed, for discharging a portion of the air flowing into the housing to the outside of the housing, and at least one exhaust fan may be provided in the at least one additional exhaust port.

[0018] According to yet another embodiment of the present invention, the exhaust device further includes an exhaust box coupled to a back side of the housing and surrounding the multiple exhaust ports, the height of the exhaust box being the same as the height of the housing, at least one integrated exhaust port extending across the housing and the exhaust box being formed in one of the side walls of the exhaust box and a corresponding side wall of the housing, at least one exhaust fan being provided in the at least one integrated exhaust port, and air flowing into the housing and the exhaust box can be discharged to the outside of the housing and the outside of the exhaust box through the at least one integrated exhaust port.

[0019] According to one embodiment of the present invention, the air intake port may be circular, and the guide plates may be ring-shaped having a width in the radial direction.

[0020] According to one embodiment of the present invention, each of the plurality of guide plates is divided into a plurality of arc-shaped members, and the plurality of arc-shaped members of each of the plurality of guide plates may be arranged together to form a ring shape inside the housing.

[0021] According to another embodiment of the present invention, the air intake port may be substantially semicircular, and the guide plates may be arc-shaped having a width in the radial direction.

[0022] According to another embodiment of the present invention, the exhaust device further includes an auxiliary guide plate extending parallel to the central axis from a position adjacent to the edge of the first exhaust port on the rear wall of the housing toward the front wall of the housing.

[0023] According to another embodiment of the present invention, the auxiliary guide plate may have a width that is greater than the diameter of the first exhaust port but is not interfered with by the guide plate that is closest to the rear wall of the housing among the plurality of guide plates.

[0024] According to yet another embodiment of the present invention, the exhaust device further includes side guide plates extending vertically from both side edges of the auxiliary guide plate to a bottom of the housing.

[0025] According to yet another embodiment of the present invention, the auxiliary guide plate is spaced a certain distance from the front wall of the housing, and at least one front guide plate is arranged within the gap between the front end of the auxiliary guide plate and the front wall of the housing, the at least one front guide plate is spaced from the front end of the auxiliary guide plate and the front wall of the housing, has a width in a direction perpendicular to the bottom of the housing, and is arranged parallel to the front wall of the housing between the side guide plates, and both longitudinal ends of the front guide plate can be fixed to the side guide plates.

[0026] According to yet another embodiment of the present invention, the at least one front guide plate may include a plurality of front guide plates arranged parallel to each other at a distance from each other, and the plurality of front guide plates may be arranged such that the height of their upper ends is higher the farther the front guide plates are arranged from the front wall of the housing.

[0027] According to yet another embodiment of the present invention, the exhaust device further includes side guide plates extending vertically upward from both side edges of the auxiliary guide plate.

[0028] According to yet another embodiment of the present invention, the auxiliary guide plate may be spaced a certain distance from a front wall of the housing, and a front guide plate may be disposed at a front end of the auxiliary guide plate, extending vertically upward from the front end of the auxiliary guide plate, and the front guide plate may be disposed parallel to the front wall of the housing and spaced apart from the front wall of the housing.

[0029] According to yet another embodiment of the present invention, the side guide plates may extend from a rear wall of the housing to a front wall of the housing, and the front guide plate may be disposed between the side guide plates. Effect of the Invention

[0030] According to an embodiment of the present invention, an exhaust device can efficiently draw in polluted air far from the exhaust device and exhaust it to the outside without a swallow that forms a vortex, thereby improving exhaust efficiency.

[0031] In addition, since the exhaust system of the present invention does not use a swallow, it does not require a separate motor to drive the swallow, and its configuration is simplified, which not only reduces manufacturing costs but also has the advantage of reducing the power consumption required to operate the exhaust system.

[0032] Furthermore, the exhaust device of the present invention has a simplified configuration and is reduced in size and weight, and therefore has the advantage of being capable of being miniaturized. [Brief description of the drawings]

[0033] [Figure 1] FIG. 1 is a schematic diagram for explaining the basic configuration and operation of an exhaust device according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is an external perspective view of the exhaust device shown in FIG. 1, showing an example in which the central axis is arranged horizontally. [Diagram 3] 3 is a vertical cross-sectional view taken along the central axis of the exhaust device shown in FIG. 2. [Figure 4] FIG. 4 is a perspective view of the guide plate shown in FIGS. 1 to 3 separated from the housing. [Diagram 5] FIG. 3 is a perspective view illustrating a modified example of the housing shown in FIG. 2. [Figure 6] 6 is a perspective view illustrating a modified example of the guide plate illustrated in FIG. 5. [Figure 7] FIG. 11 is an external perspective view of an exhaust device according to a second embodiment of the present invention, showing an example in which the central axis is arranged horizontally. [Figure 8] 8 is a vertical cross-sectional view taken along the central axis of the exhaust device shown in FIG. 7. [Figure 9] FIG. 9 is a perspective view of the guide plate shown in FIGS. 7 and 8, separated from the housing. [Figure 10] 9 is a partial perspective view showing a modified example of the portion where the auxiliary guide plate shown in FIG. 7 and FIG. 8 is provided. [Figure 11] FIG. 11 is a vertical cross-sectional view of the portion shown in FIG. [Figure 12] 9 is a partial perspective view illustrating another modified example of the portion where the auxiliary guide plate illustrated in FIGS. 7 and 8 is provided. FIG. [Figure 13] FIG. 11 is an external perspective view of an exhaust device according to a third embodiment of the present invention, showing an example in which the central axis is arranged horizontally. [Figure 14] FIG. 14 is a rear perspective view of the exhaust device shown in FIG. 13. [Figure 15]14 is a vertical cross-sectional view taken along the central axis of the exhaust device shown in FIG. 13. [Figure 16] FIG. 14 is a schematic diagram showing an example in which the exhaust device shown in FIG. 13 is used as a device for forming an air fence. [Figure 17] FIG. 14 is a perspective view illustrating a modification of the exhaust device illustrated in FIG. 13. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0034] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An exhaust system according to an embodiment of the present invention will now be described with reference to the accompanying drawings. In the following drawings, the same reference numerals denote the same components.

[0035] FIG. 1 is a schematic diagram for explaining the basic configuration and operation of an exhaust device according to a first embodiment of the present invention, FIG. 2 is an external oblique view of the exhaust device shown in FIG. 1, showing an example in which the central axis is arranged horizontally, FIG. 3 is a vertical cross-sectional view in the central axis direction of the exhaust device shown in FIGS. 1 to 3, and FIG. 4 is a perspective view showing the guide plate shown in FIG. 3 separated from the housing.

[0036] 1 to 4, the exhaust device 100 according to the first embodiment of the present invention is composed of a housing 110 having an intake port 116 and a plurality of exhaust ports 118, 119, a guide means 120 provided inside the housing 110 for guiding air flowing into the housing 110 through the intake port 116, and an exhaust means including at least one exhaust pipe 131 that is directly or indirectly connected to the plurality of exhaust ports 118, 119 and for discharging the air flowing into the housing 110 to the outside of the housing 110 through the plurality of exhaust ports 118, 119.

[0037] The housing 110 preferably has a rectangular parallelepiped shape as shown in FIG. 2, but is not limited thereto and may have other suitable shapes, such as a polygonal shape or a cylindrical shape (see FIG. 5).

[0038] The housing 110 includes a front wall 111 on the side where air flows into the housing 110, a rear wall 112 arranged to face the front wall 111 at a predetermined distance, and a side wall 114 between the front wall 111 and the rear wall 112 and connecting the front wall 111 and the rear wall 112. The front wall 111 of the housing 110 is formed with an intake port 116 through which air flows into the housing 110, and the rear wall 112 is formed with a plurality of exhaust ports 118, 119 through which air is exhausted from the housing 110.

[0039] The inlet 116 may preferably have a circular shape. The plurality of exhaust ports 118, 119 may preferably have a circular shape, but are not limited thereto, and may have other suitable shapes, such as polygonal, elliptical, or semicircular, depending on the location where the exhaust ports 118, 119 are provided.

[0040] The multiple exhaust ports 118, 119 also include one first exhaust port 118 and multiple second exhaust ports 119. The first exhaust port 118 is disposed at a position corresponding to the center of the intake port 116. Preferably, the center of the first exhaust port 118 coincides with the center of the intake port 116, and a central axis C passing through the center of the first exhaust port 118 and the center of the intake port 116 is not only the central axis of the housing 110 but also the overall air flow axis. The multiple second exhaust ports 119 may be spaced apart from the first exhaust port 118 and appropriately distributed on the rear wall 112 of the housing 110.

[0041] The exhaust device 100 according to the present invention may be disposed so that its central axis C is vertical, as shown in Fig. 1. Also, as shown in Figs. 2 and 3, the exhaust device 100 according to the present invention may be disposed so that its central axis C is horizontal. Although not shown, the exhaust device 100 according to the present invention may also be disposed so that its central axis C is inclined at a predetermined angle. In this manner, the exhaust device 100 according to the present invention may be disposed in various directions that are determined to be capable of most efficiently sucking in polluted air, depending on the location where the polluted air is generated and the installation location of the exhaust device 100. In each of the drawings, the exhaust device 100 according to the present invention is disposed in a direction that can more clearly show its configuration.

[0042] The exhaust ports 118, 119 may be directly connected to respective exhaust pipes (not shown), but are not limited thereto. The exhaust ports 118, 119 may be indirectly connected together to one exhaust pipe 131. The exhaust ports 118, 119 may also be indirectly connected to more than one exhaust pipe (not shown), for example, two or three exhaust pipes.

[0043] For this purpose, the exhaust device 100 according to the present invention further includes an exhaust box 150 coupled to the rear side of the housing 110 and surrounding the multiple exhaust ports 118, 119. The shape of the exhaust box 150 may be the same as that of the housing 110, for example, a rectangular parallelepiped shape, but the size of the exhaust box 150 may be smaller than that of the housing. For example, the width WB of the exhaust box in the direction of the central axis C is narrower than the width WH of the housing.

[0044] The front wall of the exhaust box 150 is the rear wall 112 of the housing 110. That is, the rear wall 112 of the housing 110 is shared between the housing 110 and the exhaust box 150. A common exhaust port 158 ​​is formed in the rear wall 152 of the exhaust box 150 at a substantially central portion, and the exhaust pipe 131 is connected to the common exhaust port 158. Therefore, air exhausted from the housing 110 through the multiple exhaust ports 118, 119 can be combined in the exhaust box 150 and exhausted through the common exhaust port 158 ​​and the exhaust pipe 131. Although not shown, more than one, for example, two or three common exhaust ports can be formed in the rear wall 152 of the exhaust box 150, and an exhaust pipe can be connected to each of the common exhaust ports. The plurality of exhaust ports 118, 119 includes approximately six to nine exhaust ports 118, 119 for uniform exhaust from the housing 110, but the exhaust box 150 is formed with a smaller number of common exhaust ports 158, for example, one to three, than the number of exhaust ports 118, 119, so that the number of exhaust pipes 131 used is also much smaller than the number of exhaust ports 118, 119. Therefore, the complexity of a large number of exhaust pipes is eliminated, which is desirable.

[0045] As is well known, for example, a sirocco fan (not shown) is provided in the exhaust pipe 131. The sirocco fan creates a negative pressure in the housing 110 (and the exhaust box 150), forcibly draws air outside the housing 110 into the housing 110, and discharges the drawn air to the outside through the exhaust pipe 131. Such a sirocco fan may be provided on the exhaust end side of the exhaust pipe 131. In this way, the sirocco fan provided in the exhaust pipe 131 forms an air flow that flows from the outside of the housing 110 through the intake port 116 in the front wall 111 of the housing 110, the inside of the housing 110, the exhaust ports 118 and 119 in the rear wall 112 of the housing 110, the inside of the exhaust box 150, the common exhaust port 158 ​​in the rear wall 152 of the exhaust box 150, and the exhaust pipe 131, and is discharged to the outside.

[0046] The guide means 120 is provided inside the housing 110 and serves to efficiently guide the air flowing into the housing 110 through the air inlet 118 , and includes a plurality of guide plates 121 , 122 , and 123 .

[0047] Although three guide plates 121, 122, and 123 are shown in the drawings, this is not limited thereto, and two, four or more guide plates may be provided inside the housing 110 depending on the exhaust capacity required for the exhaust device 100 and / or the size of the housing 110.

[0048] The multiple guide plates 121, 122, 123 are disposed between the front wall 111 and the rear wall 112 of the housing 110. The multiple guide plates 121, 122, 123 include a first guide plate 121, a second guide plate 122, and a third guide plate 123 that are disposed such that adjacent ones are spaced apart by a predetermined distance from each other while moving from the front wall 111 to the rear wall 112 in the direction of the central axis C, and the first guide plate 121 is spaced apart from the front wall 111, and the third guide plate 123 is spaced apart from the rear wall 112.

[0049] Specifically, as shown in FIG. 3, the first guide plate 121 is disposed in parallel to the front wall 111 at a predetermined first interval G1 from the front wall 111 in the direction of the central axis C. The second guide plate 122 is disposed in parallel to the first guide plate 121 at a predetermined second interval G2 from the first guide plate 121. The third guide plate 123 is disposed in parallel to the second guide plate 122 at a predetermined third interval G3 from the second guide plate 122. The third guide plate 123 is disposed in parallel to the second guide plate 122 at a predetermined fourth interval G4 from the rear wall 112. In this way, the front wall 111, the three guide plates 121, 122, 123, and the rear wall 112 are disposed in parallel to each other at predetermined intervals. At this time, the intervals G1, G2, G3, and G4 may be the same or different from each other in order to optimize the airflow guided by the guide plates 121, 122, and 123. For example, the intervals G1, G2, G3, and G4 may be gradually increased or decreased toward the rear wall 112, and may be determined to a value that indicates an optimal airflow through a large number of experiments. Also, the intervals G1, G2, G3, and G4 may be appropriately determined depending on the exhaust capacity required for the exhaust device 100 and / or the size of the housing 110.

[0050] As shown in FIG. 4, the first guide plate 121, the second guide plate 122, and the third guide plate 123 each have a ring shape having a predetermined width W1, W2, and W3 in the radial direction centered on the central axis C. The widths W1, W2, and W3 may be the same, but are not limited thereto. The ring-shaped guide plates 121, 122, and 123 may be fixed and disposed inside the housing 110 by being fixed to the side wall 114 of the housing 110. For this purpose, the ring-shaped guide plates 121, 122, and 123 may have fixing lugs 125 at their outer ends and may be fixed to the side wall 114 of the housing 110 through the lugs 125. The lugs 125 may have any suitable shape and size other than the shape and size shown in FIG. 4. Additionally, the lugs 125 may be secured to the side walls 114 of the housing 110 via suitable fastening means such as screws or adhesive.

[0051] The ring-shaped guide plates 121, 122, and 123 are arranged concentrically with the inlet 116 and the first exhaust port 118. However, the guide plates 121, 122, and 123, the inlet 116, and the first exhaust port 118 have different radii.

[0052] 3 and 4, the inner radius Ri1 of the first guide plate 121 is smaller than the inner radius Ra of the intake port 116, and the outer radius Ro1 of the first guide plate 121 is larger than the inner radius Ra of the intake port 116. The inner radius Ri2 of the second guide plate 122 is smaller than the inner radius Ri1 of the first guide plate 121, and the outer radius Ro2 of the second guide plate 122 is larger than the inner radius Ri1 of the first guide plate 121 but smaller than the outer radius Ro1 of the first guide plate 121. The inner radius Ri3 of the third guide plate 123 is smaller than the inner radius Ri2 of the second guide plate 122, and the outer radius Ro3 of the third guide plate 123 is larger than the inner radius Ri2 of the second guide plate 122 but smaller than the outer radius Ro2 of the second guide plate 122. Also, the inner radius Ri3 of the third guide plate 123 is larger than the inner radius Rb of the first exhaust port 118. In this manner, the inner radii of the intake port 116, the first guide plate 121, the second guide plate 122, the third guide plate 123, and the first exhaust port 118 are gradually smaller from the intake port 116 toward the first exhaust port 118, and therefore the air flow passage formed therein is gradually narrower. The inner and outer radii of the intake port 116, the guide plates 121, 122, 123, and the first exhaust port 118 can be determined to values ​​that show optimal performance through numerous experiments depending on the exhaust capacity required for the exhaust device 100 and / or the size of the housing 110.

[0053] The operation of the exhaust system 100 according to the first embodiment of the present invention having the above-mentioned configuration will be described below.

[0054] 1, when the sirocco fan installed in the exhaust pipe 131 starts to operate, negative pressure is generated inside the housing 110, and air outside the housing 110 is introduced into the housing 110 through the intake port 116. The air introduced into the housing 110 includes external air around the housing 110 (this air includes clean air and polluted air) and external air in the direction of the central axis C of the housing 110 (this air is mostly polluted air). The air introduced into the housing 110 from the peripheral part of the housing 110 forms an external air flow Fo passing through a gap G1 between the front wall 111 and the first guide plate 121, a gap G2 between the first guide plate 121 and the second guide plate 122, a gap G3 between the second guide plate 122 and the third guide plate 123, and a gap G4 between the third guide plate 123 and the rear wall 112. The outer air flow Fo thus formed has a shape that gradually narrows as it approaches the first exhaust port 118, as shown in FIG. 1, due to the arrangement of the guide plates 121, 122, and 123 having the configuration described above. As a result, an air guide passage that gradually narrows toward the first exhaust port 118 is formed inside the outer air flow Fo.

[0055] External air (i.e., mostly polluted air) in the direction of the central axis C of the housing 110 is introduced into the housing 110 toward the first exhaust port 118, forming an internal air flow Fi. Such an internal air flow Fi is guided to the first exhaust port 118 through an air guide passage formed inside the aforementioned external air flow Fo and having a gradually narrowing shape.

[0056] The inner air flow Fi flows into the exhaust box 150 through the first exhaust port 118, and the outer air flow Fo flows into the exhaust box 150 through the multiple exhaust ports 119. The inner air flow Fi and the outer air flow Fo are combined in the exhaust box 150 and then exhausted through the common exhaust port 158 ​​and the exhaust pipe 131.

[0057] As described above, in the exhaust device 100 according to the present invention, the outer air flow Fo, which is formed by the multiple guide plates 121, 122, 123 to gradually narrow as it approaches the first exhaust port 118, surrounds the inner air flow Fi, and smoothly guides the inner air flow Fi toward the first exhaust port 118 while preventing the inner air flow Fi from dispersing outward. In addition, the outer air flow Fo narrows the passage through which the inner air flow Fi passes (i.e., the air guide passage formed inside the outer air flow Fo), which increases the speed of the inner air flow Fi and increases the negative pressure, so that even polluted air far away from the exhaust device 100 can be effectively captured.

[0058] As described above, the exhaust device 100 does not have a conventional swallow for forming a vortex flow, and can efficiently suck in polluted air far from the exhaust device 100 and exhaust it to the outside using only a sirocco fan installed in the exhaust pipe, thereby improving exhaust efficiency. In addition, since the exhaust device 100 does not use a conventional swallow, it does not require a separate motor for driving the swallow, and the configuration is simplified, thereby not only reducing the manufacturing cost of the exhaust device 100 but also reducing the consumption of power required for the operation of the exhaust device 100. In addition, the exhaust device 100 can be made compact because the configuration is simplified and the size and weight are reduced.

[0059] FIG. 5 is a perspective view illustrating a modification of the housing shown in FIG.

[0060] The modified example shown in Figure 5 is substantially identical to the first embodiment shown in Figures 1 to 4 except for the differences in the shapes of the housing and exhaust box, so below only the differences between them will be described.

[0061] 5, as described above, the housing 110' may have a cylindrical shape. The housing 110' includes a front wall 111' having an intake port 116' formed therein, a rear wall 112' having a plurality of exhaust ports 118', 119' formed therein, and a side wall 114' connecting the front wall 111' and the rear wall 112' between them.

[0062] The intake port 116' may preferably have a circular shape. The multiple exhaust ports 118', 119' may also include one first exhaust port 118' and multiple second exhaust ports 119'. The first exhaust port 118' may be disposed at a position corresponding to the center of the intake port 116', and the multiple second exhaust ports 119' may be appropriately distributed on the rear wall 112' of the housing 110'.

[0063] An exhaust box 150' surrounding the exhaust ports 118', 119' may be coupled to the rear side of the housing 110'. The shape of the exhaust box 150' may be the same as that of the housing 110', for example, a cylindrical shape, but the size of the exhaust box 150' may be smaller than that of the housing. For example, the width of the exhaust box in the direction of the central axis C is narrower than that of the housing. At least one common exhaust port 158' is formed in the approximate center of a rear wall 152' of the exhaust box 150', and an exhaust pipe 131' is connected to the common exhaust port 158'.

[0064] In the modification shown in Fig. 5, the guide means 120 includes two ring-shaped guide plates 121, 122, but is not limited thereto, and three or more guide plates may be provided inside the housing 110'. The arrangement of the guide plates 121, 122, the spacing therebetween, and their inner and outer radii are substantially the same as those of the guide plates 121, 122, 123 shown in Figs. 1 to 4, and therefore detailed description thereof will be omitted to avoid repetition.

[0065] FIG. 6 is a perspective view illustrating a modified example of the guide plate shown in FIG.

[0066] 6, the guide plates 121' and 122' each have a ring shape as a whole, but each can be divided into a plurality of members. Specifically, the first guide plate 121' is made up of three partial ring-shaped members, i.e., three arc-shaped members 121a', 121b', and 121c'. That is, the first guide plate 121' is divided into three arc-shaped members 121a', 121b', and 121c', and the three arc-shaped members 121a', 121b', and 121c' are arranged to form a ring shape together inside the housing 110' to form the first guide plate 121' having a ring shape as a whole. Each of the three arc-shaped members 121a', 121b', and 121c' can have a central angle of approximately 120°. Similarly, the second guide plate 122' is made up of three arc-shaped members 122a', 122b', and 122c'.

[0067] Although the above-mentioned guide plates 121', 122' are illustrated and described as being made up of three arc-shaped members, the present invention is not limited thereto. For example, the guide plates 121', 122' may each be made up of two arc-shaped members, in which case each of the two arc-shaped members has a central angle of approximately 180°. Also, the guide plates 121', 122' may each be made up of four arc-shaped members, in which case each of the four arc-shaped members has a central angle of approximately 90°.

[0068] The arc-shaped members 121a', 121b', and 121c' of the first guide plate 121' may be fixed to the rear wall 112' of the cylindrical housing 110' shown in Fig. 5 via lugs 125' formed on both ends. The arc-shaped members 121a', 121b', and 121c' may also be fixed to the side wall 114' of the housing 110' shown in Fig. 5 via the lugs 125 as shown in Fig. 4. The lugs 125' and the lugs 125 (Fig. 4) are used together, whereby the arc-shaped members 121a', 121b', and 121c' are fixed to the rear wall 112' and the side wall 114' of the housing 110' shown in Fig. 5, thereby improving the installation stability. Similarly, the arc-shaped members 122a', 122b', 122c' of the second guide plate 122' may be fixedly installed inside the housing 110' shown in FIG. 5 via the lugs 125' and / or the lugs 125 (FIG. 44).

[0069] The arc-shaped members 121a', 121b', and 121c' of the first guide plate 121' may be arranged to be spaced apart by a predetermined interval G21 in the circumferential direction. Similarly, the arc-shaped members 122a', 122b', and 122c' of the second guide plate 122' may be arranged to be spaced apart by a predetermined interval G22 in the circumferential direction.

[0070] Although the guide plates 121' and 122' shown in Fig. 6 have been described as being provided inside the cylindrical housing 110 shown in Fig. 5, the present invention is not limited to this. For example, the guide plates 121, 122, and 123 provided inside the rectangular parallelepiped housing 110 shown in Fig. 2 may also be made of a plurality of arc-shaped members.

[0071] FIG. 7 is an external perspective view of an exhaust device according to a second embodiment of the present invention, showing an example in which the central axis is arranged horizontally, FIG. 8 is a vertical cross-sectional view of the central axis direction of the exhaust device shown in FIG. 7, and FIG. 9 is a perspective view showing the guide plate shown in FIGS. 7 and 8 separated from the housing.

[0072] 7 to 9, the exhaust device 200 according to the second embodiment of the present invention is composed of a housing 210 having an intake port 216 and a plurality of exhaust ports 218, 219, a guide means 220 provided inside the housing 210 for guiding air flowing into the housing 210 through the intake port 216, and an exhaust means including at least one exhaust pipe 231 that is directly or indirectly connected to the plurality of exhaust ports 218, 219 and for discharging the air flowing into the housing 210 to the outside of the housing 210 through the plurality of exhaust ports 218, 219.

[0073] As described above, the exhaust device 200 according to the second embodiment of the present invention is substantially identical in basic components to the exhaust device 100 according to the first embodiment. However, the exhaust device 200 according to the second embodiment of the present invention is configured to operate more efficiently when the exhaust device 200 draws in air from a partial angular range in front of the exhaust device 200, rather than the entire range in front of the exhaust device 200, such as when there is an obstacle such as a vertical wall near the exhaust device 200 whose central axis C is vertically disposed, or when the exhaust device 200 whose central axis C is horizontally disposed draws in contaminated air from a horizontal bottom or table, etc.

[0074] Therefore, as will be described in detail below, there are some differences between the exhaust device 200 according to the second embodiment of the present invention and the exhaust device 100 according to the first embodiment, and such differences will be mainly described below, and therefore descriptions of the same features will be omitted or will be briefly described.

[0075] The housing 210 preferably has a rectangular parallelepiped shape, but is not limited thereto. For example, the housing 210 may have a semi-cylindrical shape corresponding to the semi-circular air inlet 216 described below. The housing 210 includes a front wall 211 on the side where air flows into the housing 210, a rear wall 212 facing the front wall 211 at a predetermined distance, and a side wall 214 between the front wall 211 and the rear wall 212. The front wall 211 of the housing 210 is formed with an air inlet 216 through which air flows into the housing 210, and the rear wall 212 is formed with a plurality of exhaust ports 218, 219 through which air is exhausted from the housing 210.

[0076] Air inlet 216 has a substantially semicircular shape and, in this respect, differs from air inlet 116 illustrated in Figure 2. Air inlet 216 is desirably defined by an arc portion 216a having a central angle of substantially 180° and a straight portion 216b connecting both ends of arc portion 216a.

[0077] The plurality of exhaust ports 218, 219 preferably have a circular shape, but are not limited thereto, and may have other suitable shapes, such as polygonal, elliptical, or semicircular, depending on the location where the exhaust ports 218, 219 are provided.

[0078] The plurality of exhaust ports 218, 219 may also include one first exhaust port 218 and a plurality of second exhaust ports 219. The center of the first exhaust port 218 may desirably coincide with the center of the intake port 216. The plurality of second exhaust ports 219 may be spaced apart from the first exhaust port 218 and appropriately distributed on the rear wall 212 of the housing 210.

[0079] 7, the exhaust device 200 is illustrated as being disposed so that the central axis C is horizontal, but is not limited thereto. As described above, the exhaust device 200 may be disposed so that the central axis C is vertical, or so that the central axis C is inclined at a predetermined angle.

[0080] The exhaust ports 218, 219 may be directly connected to respective exhaust pipes (not shown), but are not limited thereto. As described above, the exhaust ports 218, 219 may be indirectly connected to at least one exhaust pipe 231 via an exhaust box 250 that is coupled to the rear side of the housing 210 and surrounds the exhaust ports 218, 219 together, and at least one common exhaust port 258 formed in a rear wall 252 of the exhaust box 250. The center of the common exhaust port 258 may coincide with the central axis C, but is not limited thereto. For example, the common exhaust port 258 may be formed in an approximately central portion of the rear wall 252 of the exhaust box 250.

[0081] The exhaust pipe 231 is the same as the exhaust pipe 131 of the exhaust device 100 according to the first embodiment, and therefore a detailed description thereof will be omitted.

[0082] The guide means 220 is provided inside the housing 210 and is a means for efficiently guiding the air flowing into the inside of the housing 210 through the air intake 118, and may include a plurality of guide plates, preferably three guide plates 221, 222, and 223, but is not limited thereto. That is, the guide means may include two or four or more guide plates.

[0083] The multiple guide plates 221, 222, 223 are disposed between the front wall 211 and the rear wall 212 of the housing 210. The multiple guide plates 221, 222, 223 include a first guide plate 221, a second guide plate 222, and a third guide plate 223 that are disposed such that adjacent ones are spaced apart by a predetermined distance while moving from the front wall 211 to the rear wall 212 in the direction of the central axis C, and the first guide plate 221 is spaced apart from the front wall 211, and the third guide plate 223 is spaced apart from the rear wall 212.

[0084] The specific arrangement of the guide plates 221, 222, and 223 and the intervals therebetween are the same as those of the guide plates 121, 122, and 123 of the exhaust device 100 according to the first embodiment of the present invention, and therefore a detailed description thereof will be omitted.

[0085] As shown in Fig. 9, the first guide plate 221, the second guide plate 222 and the third guide plate 223 are each substantially arc-shaped with a predetermined width W1, W2, W3 in the radial direction centered on the central axis C. Specifically, the guide plates 221, 222, 223 are preferably arc-shaped with a central angle of about 180° to 210°. The widths W1, W2, W3 of the guide plates 221, 222, 223 may be the same, but are not limited thereto. In this way, the guide plates 221, 222, 223 are different from the ring-shaped guide plates 121, 122, 123 shown in Fig. 4 in that they have an arc shape.

[0086] The arc-shaped guide plates 221, 222, and 223 can be fixed and disposed inside the housing 210 by being fixed to the side wall 214 of the housing 210. For this purpose, the arc-shaped guide plates 221, 222, and 223 have fixing lugs 225 at the outer ends of both ends, and can be fixed to the side wall 214 of the housing 210 via the lugs 225.

[0087] The arc-shaped guide plates 221, 222, 223 are arranged concentrically with the intake port 216 and the first exhaust port 218. However, the guide plates 221, 222, 223, the intake port 216, and the first exhaust port 218 have different radii. The size relationship between the inner radius of the intake port 216, the inner radius of the first exhaust port 218, and the inner radii Ri1, Ri2, Ri3, and the outer radii Ro1, Ro2, Ro3 of the guide plates 221, 222, 223 is the same as the size relationship between the inner radius Ra of the intake port 116, the inner radius Rb of the first exhaust port 118, and the inner radii Ri1, Ri2, Ri3, and the outer radii Ro1, Ro2, Ro3 of the guide plates 121, 122, 123 of the exhaust device 100 according to the first embodiment, and therefore a detailed description thereof will be omitted.

[0088] As described above, in the second embodiment of the present invention, the inner radii of the intake port 216, the first guide plate 221, the second guide plate 222, the third guide plate 223 and the first exhaust port 218 gradually become smaller moving from the intake port 216 side to the first exhaust port 218 side, so that the air flow passages formed therein also gradually become narrower.

[0089] The operation of the exhaust device 200 according to the second embodiment of the present invention having the above-described configuration is substantially the same as the operation of the exhaust device 100 according to the first embodiment described in detail above, and therefore the advantages of the exhaust device 200 are also the same as the advantages of the exhaust device 100 according to the first embodiment.

[0090] In particular, in the exhaust device 200 according to the second embodiment, the intake port 216 is formed in a semicircular shape, and the guide plates 221, 222, and 223 also have an arc shape, so that, as described above, the exhaust device 200 can operate more efficiently when it draws in air from a partial angular range in front of the exhaust device 200 rather than from the entire range in front of the exhaust device 200, for example, when there is an obstacle such as a vertical wall near the exhaust device 200 whose central axis C is arranged vertically, or when the exhaust device 200 whose central axis C is arranged horizontally draws in contaminated air arising from a horizontal bottom or table, etc.

[0091] The exhaust device 200 further includes an auxiliary guide plate 245 and a side guide plate 246 .

[0092] The auxiliary guide plate 245 extends parallel to the central axis C from the rear wall 212 of the housing 210 toward the front wall 211. In an example in which the auxiliary guide plate 245 is provided, the first exhaust port 218 is formed in a semicircular shape corresponding to the intake port 216, not in a circular shape, and the auxiliary guide plate 245 may extend horizontally from a position adjacent to the edge of the first exhaust port 218 to the front wall 211. The auxiliary guide plate 245 has a width wider than the diameter of the first exhaust port 218, but the width is smaller than or equal to twice the inner radius Ri3 of the third guide plate 223 so that the auxiliary guide plate 245 does not interfere with the third guide plate 223. The auxiliary guide plate 245 serves to smoothly guide the inner air flow Fi flowing into the housing 210 through the intake port 216 toward the first exhaust port 218.

[0093] The side guide plates 246 extend vertically downward from both side edges of the auxiliary guide plate 245 to the bottom of the housing 210. The side guide plates 246 serve to smoothly guide the outer air flow Fo flowing into the housing 210 toward the second exhaust ports 219 disposed on both sides of the first exhaust port 218.

[0094] FIG. 10 is a partial perspective view showing a modified example of the portion where the auxiliary guide plate shown in FIGS. 7 and 8 is provided, and FIG. 11 is a vertical sectional view of the portion shown in FIG.

[0095] 10 and 11, the auxiliary guide plate 245 extends from the rear wall 212 of the housing 210 toward the front wall 211, but does not extend to the front wall 211 and is spaced a predetermined distance from the front wall 211. At least one front guide plate, for example, two front guide plates 247 and 248, may be disposed within the space between the front end of the auxiliary guide plate 245, i.e., the end on the intake port 216 side, and the front wall 211.

[0096] The front guide plates 247, 248 each have a predetermined width W11, W12 in the vertical direction relative to the bottom of the housing 210, extend parallel to the front wall 211 between the side guide plates 246, and both ends in the longitudinal direction are fixed to the side guide plates 246. The widths W11, W12 of the front guide plates 247, 228 may be the same, but are not limited thereto. The front guide plates 247, 248 are not only spaced apart from the front end of the auxiliary guide plate 245 and the front wall 211, but are also spaced apart from each other by a predetermined distance. That is, the first front guide plate 247 is disposed parallel to the front wall 211 at a predetermined first distance G11 from the front wall 211, and the second front guide plate 248 is disposed parallel to the first front guide plate 247 at a predetermined second distance G12 from the first front guide plate 247. Further, the second front guide plate 248 is disposed at a predetermined third distance G13 from the end of the auxiliary guide plate 245.

[0097] The first front guide plate 247 may be arranged such that its upper end is higher than or at the same height as the straight portion 216b of the air intake 216 formed in the front wall 211, and the second front guide plate 248 may be arranged such that its upper end is higher than the upper end of the first front guide plate 247 and at the same height as the auxiliary guide plate 245. In other words, the front guide plates 247, 248 may be arranged such that the height of their upper ends is higher the farther they are disposed from the front wall 211 of the housing.

[0098] If only one front guide plate is provided, for example, if only the first front guide plate 247 is provided, the first front guide plate 247 may be positioned so that its upper end is higher than or equal to the straight portion 216b of the air intake 216 formed in the front wall 211, and is equal to or lower than the height of the auxiliary guide plate 245.

[0099] The widths W11, W12, spacing G11, G12, G13, and placement heights of the aforementioned front guide plates 247, 248 can be determined through numerous experiments to values ​​that indicate optimal air flow depending on the exhaust capacity required for the exhaust device 200 and / or the size of the housing 210.

[0100] As shown in FIG. 11, the front guide plates 247, 248 not only serve to smoothly guide the outer air flow Fo that flows from the lower front side of the front wall 211 of the housing 210, across the straight portion 216b of the air intake port 216, and into the interior of the housing 210, toward the second exhaust port 219 located on the lower side of the rear wall 212, but also serve to more smoothly guide the inner air flow Fi toward the first exhaust port 218.

[0101] FIG. 12 is a partial perspective view illustrating another modified example of the portion where the auxiliary guide plate shown in FIGS. 7 and 8 is provided.

[0102] 12, the auxiliary guide plate 245 extends from the rear wall 212 of the housing 210 toward the front wall 211, but does not extend to the front wall 211 and is spaced a predetermined distance from the front wall 211. In this modified example, the auxiliary guide plate 245 is slightly moved toward the bottom side of the housing 210 to further increase the area of ​​the first exhaust port 218 compared to the embodiment shown in Figures 7 to 11. As a result, the first exhaust port 218 may have a shape between a semicircular shape and a complete circle, or a complete circle, as shown in Figure 12, instead of the semicircular shape shown in Figures 7 to 11.

[0103] Furthermore, a front guide plate 249 may be disposed at the front end of the auxiliary guide plate 245, i.e., the end on the intake port 216 side, so as to extend vertically upward from said end. The front guide plate 249 is fixed to the end of the auxiliary guide plate 245 and extends parallel to the front wall 211 with a predetermined gap G21 between it and the front wall 211. The front guide plate 249 is disposed so that its upper end is at the same height as the straight portion 216b of the intake port 216 formed in the front wall 211.

[0104] A portion of the air flow that flows into the interior of the housing 210 from the lower front side of the front wall 211 of the housing 210, passes over the straight portion 216b of the air intake port 216, passes through the gap G21 between the front guide plate 249 and the front wall 211, and is guided to the side of the second exhaust port 219 located on the lower side of the rear wall 212 of the housing 210.

[0105] Side guide plates 261 may be disposed at both ends of the auxiliary guide plate 245, extending vertically upward therefrom. The front guide plate 249 may be disposed between the side guide plates 261. Unlike the side guide plate 246 illustrated in FIG. 7, the side guide plate 261 serves to smoothly guide the inner air flow Fi flowing into the housing 210 toward the first exhaust port 218. The height of the upper end of the side guide plate 261 is higher than the height of the straight portion 216b of the intake port 216 formed in the front wall 211, but is not limited thereto. For example, the upper end of the side guide plate 261 may be at the same height as the straight portion 216b of the intake port 216. The height of the side guide plate 261 may be the same as the height of the front guide plate 249 or higher than the height of the front guide plate 249.

[0106] The side guide plate 261 extends from the rear wall 212 to the front wall 211 of the housing 210, and a front end of the side guide plate 261 may be connected to a concealing plate 263 that conceals parts of both sides of the air intake 216. The concealing plate 263 may be formed by extending the front wall 211 of the housing 210 upward to a certain height onto both sides of the straight portion 216b of the air intake 216. The concealing plate 263 serves to facilitate smooth air flow near the corner where the arc portion 216a and the straight portion 216b of the semicircular air intake 216 meet.

[0107] The auxiliary guide plate 245 may be selectively provided with a side guide plate 261 and a front guide plate 249, but is preferably provided with both the side guide plate 261 and the front guide plate 249. In this case, the height of the side guide plate 261 is the same as or higher than the height of the front guide plate 249.

[0108] Figure 13 is an external oblique view of an exhaust device according to a third embodiment of the present invention, showing an example in which the central axis is arranged horizontally, Figure 14 is a rear oblique view of the exhaust device shown in Figure 13, Figure 15 is a vertical cross-sectional view of the central axis of the exhaust device shown in Figure 13, and Figure 16 is a schematic diagram showing an example in which the exhaust device shown in Figure 13 is used as a device for forming an air fence.

[0109] 13 to 16, an exhaust device 300 according to a third embodiment of the present invention includes a housing 310 having an intake port 216 and a plurality of exhaust ports 318, 319, a guide means 320 provided inside the housing 310 for guiding air flowing into the housing 310 through the intake port 216, and an exhaust means directly or indirectly connected to the plurality of exhaust ports 318, 319 for discharging the air flowing into the housing 310 to the outside of the housing 210 through the plurality of exhaust ports 318, 319.

[0110] As mentioned above, the exhaust apparatus 200 according to the second embodiment of the present invention is substantially identical in basic components to the above-mentioned embodiments, particularly the exhaust apparatus 200 according to the second embodiment. Therefore, in Figures 13 to 15, the same reference numerals are used for the same components as those of the exhaust apparatus 200 according to the second embodiment of the present invention. However, as will be described in detail below, there are some differences between the exhaust apparatus 300 according to the third embodiment of the present invention and the exhaust apparatus 200 according to the second embodiment, and such differences will be mainly described below. Therefore, the description of the same features may be omitted or may be briefly described.

[0111] The exhaust device 300 according to the third embodiment of the present invention includes an exhaust box 350 coupled to the rear side of the housing 310 and surrounding a plurality of exhaust ports 318, 319, as in the previous embodiments, but the exhaust box 350 has a height H2 that is lower than the height H1 of the housing 310. Thus, a step is formed between one side wall 314 of the housing 310 and one side wall 354 of the exhaust box 350 that corresponds thereto, i.e. faces in the same direction.

[0112] In the exhaust box 350, at least one, preferably two common exhaust ports 358 may be formed in one of the side walls, i.e., the side wall 354 forming a step between the exhaust box 350 and the corresponding side wall 314 of the housing 310, rather than in the rear wall 352 of the exhaust box 350. Each of the common exhaust ports 358 may be provided with an exhaust fan 331, rather than an exhaust pipe 231 (FIG. 7), as an exhaust means. Therefore, as shown in FIG. 15, air flowing into the exhaust box 350 from the housing 310 through the multiple exhaust ports 318 and 319, i.e., an inner air flow Fi flowing into the exhaust box 350 through the first exhaust port 218 and an outer air flow Fo flowing into the exhaust box 350 through the second exhaust port 219, is discharged to the outside through the common exhaust port 358 and the exhaust fan 331. In addition, the air that has flowed into the exhaust box 350 is discharged from the exhaust box 350 in a direction approximately perpendicular to the direction of the air that has flowed in, rather than in a direction parallel to the direction of the air that has flowed in.

[0113] Also, the exhaust device 300 according to the third embodiment of the present invention further includes at least one, preferably two, additional exhaust ports 371 formed in one of the side walls of the housing 310, i.e., the side wall 314 of the housing 310 corresponding to the side wall 354 of the exhaust box 350 in which the common exhaust port 358 is formed, and each of the additional exhaust ports 371 may be provided with an exhaust fan 332 for discharging a portion of the air flowing into the housing 310 to the outside. As shown in FIG. 15, a portion of the outer air flow Fo that is introduced into the housing 310 through the intake port 216 and guided by the guide plates 221, 222, and 223 is introduced into the exhaust box 350 through the second exhaust port 219, and the remaining portion is discharged to the outside of the housing 310 through the additional exhaust port 371 and the exhaust fan 332. Therefore, of the air flowing into the housing 310, the air exhausted through the additional exhaust port 371 is exhausted from the housing 310 in a direction approximately perpendicular to the direction in which the air flowed into the housing 310, rather than in a direction parallel to the direction in which the air flowed into the housing 310.

[0114] The modified examples shown in FIGS. 10 to 12 may also be applied to the exhaust device 300 according to the third embodiment of the present invention having the above-mentioned configuration.

[0115] The exhaust system 300 may be used as an air fence forming device, as shown in FIG.

[0116] More specifically, the exhaust device 300 may be installed with its central axis perpendicular to the entrance side of the ceiling CE of the work space WS where polluted air is generated. In addition, the exhaust device 200 according to the second embodiment of the present invention may be installed next to the exhaust device 300, closer to the inside of the work space WS than the exhaust device 300, i.e., between the exhaust device 300 and the inner wall SW of the work space WS. Although FIG. 16 illustrates that the exhaust devices 200 and 300 are installed one by one, a number of exhaust devices 200 and a number of exhaust devices 300 may be arranged in a line depending on the entrance width of the work space WS. In addition, the exhaust device 100 according to the first embodiment of the present invention may be installed instead of the exhaust device 200 according to the second embodiment of the present invention.

[0117] As described above, the exhaust device 300 can form an air flow circulating in the front of the workspace WS as shown in FIG. 16 because the air flow direction of the air flowing into the exhaust device 300 is approximately perpendicular to the air flow direction of the air exhausted from the exhaust device 300. Such air flow is mostly made of clean air outside the workspace WS, not contaminated air inside the workspace WS, and forms an air fence Fa that separates the inside and outside of the workspace WS. Such an air fence Fa can serve to prevent contaminated air inside the workspace WS from escaping to the outside of the workspace WS. In addition, the air fence Fa can prevent air outside the workspace WS from flowing into the inside of the workspace WS, thereby increasing the exhaust efficiency of the exhaust device 200. The contaminated air that has flowed into the exhaust device 200 is exhausted through the exhaust pipe 231.

[0118] FIG. 17 is a perspective view illustrating a modification of the exhaust device shown in FIG.

[0119] The exhaust device 300' shown in Figure 17 differs from the exhaust device 300 shown in Figures 13 to 15 in that the height of the exhaust box 350' is the same as the height of the housing 310, and that the common exhaust port and the additional exhaust port are not formed separately, but an integrated exhaust port 372 is formed by integrating the common exhaust port and the additional exhaust port.

[0120] Specifically, the exhaust box 350' of the exhaust device 300' has the same height H2 as the height H1 of the housing 310. Therefore, the side wall 314 of the housing 310 and the side wall 354' of the exhaust box 350' form a single plane. At least one, preferably two, integrated exhaust ports 372 are formed in one of the side walls of the housing 310 and the corresponding side wall 354' of the exhaust box 350' across the housing 310 and the exhaust box 350'. Each integrated exhaust port 372 is provided with an exhaust fan 333 as an exhaust means.

[0121] According to the above-described configuration, a portion of the outer air flow Fo that flows into the housing 310 through the air intake 216 and is guided by the multiple guide plates 221, 222, 223 is discharged to the outside of the housing 310 through the portion of the integrated exhaust port 372 formed in the side wall 314 of the housing 310 and the exhaust fan 333, and the air that flows from the housing 310 into the exhaust box 350 through the multiple exhaust ports 318, 319 is discharged to the outside of the exhaust box 350' through the portion of the integrated exhaust port 372 formed in the side wall 354' of the exhaust box 350' and the exhaust fan 333.

[0122] The modified examples shown in FIGS. 10 to 12 can be applied to the exhaust device 300' having the above-mentioned configuration.

[0123] As described above, the exhaust device 300' shown in FIG. 17 has an advantage in that the number of exhaust ports is reduced compared to the exhaust device 300 shown in FIGS. 13 to 16, and therefore the number of exhaust fans is also reduced.

[0124] Although the present invention has been described with reference to the embodiments shown in the drawings, they are merely illustrative, and those skilled in the art will appreciate that various modifications and equivalent alternative embodiments are possible therefrom. Therefore, the true scope of protection of the present invention is defined by the appended claims.

Claims

1. a housing including a front wall having an intake port formed therein, and a rear wall arranged opposite the front wall and having a plurality of exhaust ports formed therein; a guide means provided inside the housing for guiding air flowing into the housing through the air intake; an exhaust means connected directly or indirectly to the plurality of exhaust ports for exhausting air flowing into the housing to the outside of the housing through the plurality of exhaust ports; the plurality of exhaust ports include a first exhaust port disposed at a position corresponding to a center of the intake port, and a plurality of second exhaust ports spaced apart from the first exhaust port and distributed on the rear wall of the housing; the guide means includes a plurality of guide plates disposed between the front wall and the rear wall of the housing, spaced apart from each other on a central axis side of the intake port and parallel to the front wall, The plurality of guide plates are arranged concentrically around a central axis of the air intake port, and each of the guide plates has a ring shape or a circular arc shape, An exhaust device characterized in that the inner radii of the multiple guide plates are smaller than the inner radius of the intake port and larger than the inner radius of the first exhaust port, and gradually become smaller as they move from the intake port toward the first exhaust port.

2. 2. The exhaust device according to claim 1, wherein an outer radius of the plurality of guide plates gradually decreases as the guide plates move from the intake port toward the first exhaust port, and an outer radius of the guide plate closest to the front wall of the housing among the plurality of guide plates is larger than an inner radius of the intake port.

3. The exhaust device according to claim 1 , wherein the guide plates are fixedly disposed inside the housing by being fixed to a side wall or the rear wall of the housing.

4. 4. The exhaust system according to claim 3, wherein each of the guide plates has a fixing lug, and is fixed to the side wall or the rear wall of the housing via the lug.

5. 2. The exhaust system according to claim 1, wherein the housing has a rectangular parallelepiped or cylindrical shape.

6. The exhaust device further includes an exhaust box coupled to a rear side of the housing and surrounding the plurality of exhaust ports; At least one common exhaust port is formed in a rear wall of the exhaust box to exhaust air flowing into the exhaust box through the plurality of exhaust ports to the outside of the exhaust box; 2. The exhaust system according to claim 1, wherein at least one exhaust pipe is connected to the at least one common exhaust port as the exhaust means.

7. The exhaust device further includes an exhaust box coupled to a rear side of the housing and surrounding the plurality of exhaust ports; The exhaust box has a height lower than that of the housing, and thus forms a step between the exhaust box and a corresponding side wall of the housing. At least one common exhaust port is formed in the side wall of the exhaust box to exhaust air flowing into the exhaust box through the plurality of exhaust ports to the outside of the exhaust box. At least one exhaust fan is provided as the exhaust means in the at least one common exhaust port, At least one additional exhaust port is formed in a side wall of the housing corresponding to the side wall of the exhaust box in which the common exhaust port is formed, for discharging a portion of the air introduced into the housing to the outside of the housing; 2. The exhaust device according to claim 1, wherein the at least one additional exhaust outlet is provided with at least one exhaust fan.

8. the exhaust device further includes an exhaust box coupled to a rear side of the housing and surrounding the plurality of exhaust ports, the exhaust box having a height equal to a height of the housing; At least one integrated exhaust port is formed in one of the side walls of the exhaust box and the corresponding side wall of the housing, the integrated exhaust port being provided across the housing and the exhaust box; The at least one integrated exhaust outlet is provided with at least one exhaust fan; 2. The exhaust device according to claim 1, wherein air introduced into the housing and the exhaust box is exhausted to the outside of the housing and the outside of the exhaust box through the at least one integrated exhaust port.

9. 7. The exhaust device according to claim 1, wherein the intake port is circular, and the guide plates are ring-shaped having a width in a radial direction.

10. The plurality of guide plates are each divided into a plurality of arc-shaped members, 10. The exhaust system according to claim 9, wherein the plurality of arc-shaped members of each of the plurality of guide plates are arranged inside the housing so as to together form a ring shape.

11. the air inlet is substantially semicircular in shape; 9. The exhaust system according to claim 1, wherein the plurality of guide plates are arc-shaped and have a width in the radial direction.

12. 12. The exhaust device according to claim 11, further comprising an auxiliary guide plate extending parallel to the central axis from a position adjacent to an edge of the first exhaust port on the rear wall of the housing toward the front wall of the housing.

13. The exhaust device according to claim 12, wherein the auxiliary guide plate has a width larger than a diameter of the first exhaust port but not interfered with by a guide plate among the plurality of guide plates that is closest to the rear wall of the housing.

14. The exhaust device according to claim 12, further comprising side guide plates extending vertically from both side edges of the auxiliary guide plate to a bottom of the housing.

15. The auxiliary guide plate is spaced apart from the front wall of the housing by a certain distance, and at least one front guide plate is disposed within the space between a front end of the auxiliary guide plate and the front wall of the housing; The at least one front guide plate is spaced apart from a front end of the auxiliary guide plate and the front wall of the housing, has a width perpendicular to the bottom of the housing, and is disposed between the side guide plates and parallel to the front wall of the housing; 15. The exhaust device according to claim 14, wherein both longitudinal ends of the front guide plate are fixed to the side guide plates.

16. 16. The exhaust device according to claim 15, wherein the at least one front guide plate includes a plurality of front guide plates arranged parallel to each other at intervals, and the plurality of front guide plates are arranged such that the height of the upper end of each of the front guide plates is higher the farther the front guide plates are arranged from the front wall of the housing.

17. The exhaust device according to claim 12, further comprising side guide plates extending vertically upward from both side edges of the auxiliary guide plate.

18. the auxiliary guide plate is spaced apart from the front wall of the housing by a certain distance, and a front guide plate is disposed at a front end of the auxiliary guide plate, the front end of the auxiliary guide plate being extended vertically upward from the front end of the auxiliary guide plate; The exhaust system according to claim 17, wherein the front guide plate is spaced apart from and parallel to the front wall of the housing.

19. 20. The exhaust system of claim 18, wherein the side guide plates extend from the rear wall of the housing to the front wall of the housing, and the front guide plate is disposed between the side guide plates.

Images