Ventilation system

Abstract

To provide a ventilation device that prevents malfunctions such as the sticking of movable parts, ensuring stable quality, and has a configuration that is advantageous for miniaturization and thinning. [Solution] A ventilation device 1 for ventilating a room by exhausting indoor air to the outside, comprising a centrifugal fan 11 that is installed vertically to exhaust air downward and exhausts air taken in horizontally vertically downward, a main body case 2 that houses the centrifugal fan 11, an exhaust port 18 formed at the bottom of the main body case 2, and a plurality of inclined plates 20a, 20b, 20c arranged below the centrifugal fan 11 inside the main body case 2, an air passage 17 through which air flows from the centrifugal fan 11 is formed at the bottom of the centrifugal fan 11 inside the main body case 2, and of the vertically adjacent inclined plates 20a, 20b, one inclined plate 20a has its tip inclined downward toward one of the opposing surfaces 2b of the main body case 2, and the other inclined plate 20b has its tip inclined downward toward the other of the opposing surfaces 2a.

Description

【Technical Field】 , , , , , , , , , , , , 【0005】 , 【0001】 The present invention relates to a ventilation device that exhausts indoor air to the outside to ventilate the interior of a room. 【Background Art】 【0002】 Conventionally, a ventilation device has been installed in equipment such as cubicles and high-voltage switchboards to exhaust the air inside the equipment to the outside of the equipment to ventilate the interior of the equipment. For example, the ventilation device described in Patent Document 1 is attached to the ceiling surface or side surface of a box for housing electrical equipment. When the fan operates, the air in the box for housing electrical equipment is sucked into the ventilation device through the air inlet of the box for housing electrical equipment and exhausted from the exhaust port. 【0003】 The ventilation device described in Patent Document 1, regardless of whether it is attached to the ceiling surface or the side surface of the box for housing electrical equipment, is configured such that the exhaust port is blocked by a shutter without using a spring when the fan stops, thereby preventing foreign matter from entering the ventilation device or the box for housing electrical equipment when the fan stops. 【0004】 The ventilation device described in Patent Document 2 has a propeller fan installed inside the room to be ventilated and an outdoor hood installed outside the room. The outdoor hood is for preventing rain and wind from entering the room. The side of the outdoor hood facing the room to be ventilated communicates with a ventilation hole facing the wall surface of the room to be ventilated, and the lower surface is open as an opening. Due to the action of the propeller fan, the indoor air is exhausted from the opening of the outdoor hood. 【Prior Art Documents】 【Patent Documents】 【0005】 【Patent Document 1】 Japanese Unexamined Patent Application Publication No. 2012-177501 【Patent Document 2】 Japanese Utility Model Publication No. 62-40429 【Summary of the Invention】 【Problems to be Solved by the Invention】<000003"> 【0006】 However, the ventilation device described in Patent Document 1 is designed to prevent foreign objects from entering the ventilation device or the electrical equipment housing when the fan is stopped, but this is done by an opening and closing mechanism using a shutter, and there was a risk of malfunction such as the shutter, which is a movable part, becoming stuck. 【0007】 Furthermore, the ventilation device described in Patent Document 2 is a device that performs ventilation using a propeller fan, and in order to exhaust efficiently, it was necessary to widen the space behind the propeller fan (outdoor side). In this case, the depth dimension of the outdoor hood becomes large, and the ventilation device described in Patent Document 2 had a configuration that was disadvantageous for miniaturization and thinning. 【0008】 The present invention aims to solve the aforementioned problems of the conventional system and to provide a ventilation device that prevents malfunctions such as the sticking of movable parts, ensuring stable quality, and has a configuration that is advantageous for miniaturization and thinning. [Means for solving the problem] 【0009】 To achieve the above objective, the ventilation device of the present invention is a ventilation device that ventilates a room by exhausting indoor air to the outside, and comprises a centrifugal fan that is installed vertically to exhaust air downward and exhausts air taken in horizontally vertically downward, a main body case that houses the centrifugal fan, an exhaust port formed at the bottom of the main body case, and a plurality of inclined plates arranged below the centrifugal fan inside the main body case, wherein an air passage is formed inside the main body case below the centrifugal fan through which air flows from the centrifugal fan, and of the vertically adjacent inclined plates, one inclined plate has its tip inclined downward toward one of the opposing surfaces of the main body case, and the other inclined plate has its tip inclined downward toward the other of the opposing surfaces. 【0010】 In the ventilation device of the present invention described above, it is preferable that the inclined plates adjacent to each other in the vertical direction are arranged such that the tip of the upper inclined plate faces the inclined surface of the lower inclined plate. 【0011】 Furthermore, it is preferable that the main body case is a box-shaped structure, and a fan cover having ventilation holes for drawing air into the centrifugal fan is fixed to the main body case, and when the ventilation device is installed, the fan cover is on the indoor side, and only the box-shaped main body case is visible from the outdoor side. 【0012】 Furthermore, it is preferable that the main body case includes a main body cover that constitutes the exterior appearance of the box when viewed from the outside, and that an inner frame is housed inside the main body cover, with the inner frame being enclosed by the main body cover. [Effects of the Invention] 【0013】 According to the present invention, since multiple inclined plates are arranged below the centrifugal fan inside the main case, even if dust and other particles enter the main case along with the outside air when the unit is stopped, it is possible to prevent them from entering the position of the centrifugal fan, which is a movable part and an electrical component. Since the inclined plates are not movable parts that perform opening and closing operations, malfunctions such as the movable parts becoming stuck do not occur, resulting in stable quality. 【0014】 Furthermore, since the present invention uses a centrifugal fan that takes in air horizontally and exhausts it vertically downwards, and is installed vertically to exhaust air downwards, the installation dimensions are significantly reduced on both the indoor and outdoor sides. Therefore, when the ventilation device according to the present invention is installed on a door, there is clearance to prevent interference with the external structure when the door is opened. When the device is installed on the passageway side, the protrusion into the passageway is small, so it can be prevented from obstructing movement in the passageway. In addition, the slim and simple appearance is improved. 【0015】 Furthermore, since the ventilation device according to the present invention is installed vertically, when the device is placed outdoors, most of the rainwater falls downward along the surface of the main body case, resulting in a configuration that is advantageous for waterproofing. 【0016】 As described above, the ventilation device according to the present invention has a thin and simple appearance and is vertically installed. Therefore, even if the vertical length of the main body case is increased, there is a margin for interference with the external structural parts when the door is opened, and it is certain that it will not interfere with running in the passage or the like, and the appearance will not be significantly damaged. In addition, if the vertical length of the main body case is increased, in addition to the smooth flow of exhaust during operation, the effect of preventing foreign matters, dust, etc. from entering up to the arrangement position of the centrifugal fan will be further enhanced when the operation is stopped. 【0017】 In the ventilation device of the present invention, according to the configuration in which the inclined plates adjacent in the vertical direction are arranged such that the tip of the upper inclined plate faces the inclined surface of the lower inclined plate, the distance between the inclined plates becomes closer, and the effect of preventing dust and the like from entering the arrangement position of the centrifugal fan can be further enhanced. 【0018】 In the ventilation device of the present invention, according to the configuration in which the fan cover is on the indoor side and only the main body case is visible from the outdoor side when the device is installed, the appearance is thin and simple, with only the main body case of the box body visible from the outside. 【0019】 In the ventilation device of the present invention, according to the configuration in which the inner frame is housed inside the main body cover and the inner frame is in a state of being wrapped by the main body cover, in addition to having a thin and simple appearance, the fixtures and the like visible from the outside are minimized, and the appearance becomes even better. 【Brief Description of the Drawings】 【0020】 [Figure 1] Overall perspective view of the ventilation device according to an embodiment of the present invention. [Figure 2] Perspective view showing the state where the fan cover is removed from the ventilation device shown in FIG. 1. [Figure 3] Perspective view seen from the front side of the ventilation device shown in FIG. 1. [Figure 4] Longitudinal sectional view of the ventilation device shown in FIG. 1. [Figure 5] Perspective view of the centrifugal fan according to an embodiment of the present invention. [Figure 6] In one embodiment of the present invention, a diagram for explaining the action by the arrangement of the inclined plate. [Figure 7] An external perspective view of equipment equipped with a ventilation device according to one embodiment of the present invention. [Figure 8] A longitudinal sectional view of the equipment shown in FIG. 7. [Figure 9] A comparison diagram showing a comparison of the installation dimensions between the ventilation device according to one embodiment of the present invention and the ventilation device according to the conventional example. [Figure 10] An exploded perspective view of the ventilation device according to one embodiment of the present invention. 【Mode for Carrying Out the Invention】 【0021】 Hereinafter, an embodiment of the ventilation device according to the present invention will be described with reference to the drawings. FIG. 1 shows an overall perspective view of a ventilation device 1 according to one embodiment of the present invention. The installation target of the ventilation device 1 is, for example, equipment such as a cubicle, a high-voltage panel, a control panel, a distribution board, etc., but it is not limited to these, and any room, building, or structure having an internal space that requires ventilation may be used. Further, the ventilation device 1 is installed vertically so as to exhaust the air taken in horizontally (arrow a) vertically downward (arrow b). In FIG. 1, the ventilation device 1 is composed of a main body case 2 and a fan cover 5 in terms of appearance. The main body case 2 side (outdoor side) is the front side, and the fan cover 5 side (indoor side) is the back side. 【0022】 The main body case 2 has the back side of the main body cover 3 covered with a back panel 4. A sealing material 9 is attached to the outer periphery of the back panel 4. The main body case 2 shown in FIG. 1 is an example, and any other configuration may be used as long as it forms a box body having an internal space. The fan cover 5 has ventilation holes 6 formed therein. The ventilation holes 6 in FIG. 1 are formed by punching holes in the fan cover 5, but other configurations may also be used. Further, a filter may be added to the ventilation holes 6. 【0023】 Figure 2 is a perspective view showing the ventilation device 1 shown in Figure 1 with the fan cover 5 removed. A centrifugal fan 11 is located at the back of the duct 10. The centrifugal fan 11 is equipped with blades 13 and a motor 12 that rotates the blades 13. The power cord 7 is for supplying power to the motor 12. 【0024】 Figure 3 is a perspective view of the ventilation device 1 shown in Figure 1, viewed from the front. The main body cover 3 is a box-shaped structure, and each surface of the box is flat. As will be described later with reference to Figure 10, in the configuration of Figure 3, there are no structures attached to the main body cover 3 except for the mounting screws 8, and the internal structure is not visible. As a result, when viewed from the front, the ventilation device 1 has a thin and simple appearance, with only the main body case 2 of the box-shaped structure visible, and when mounted on the door of equipment, there is clearance to prevent interference with the external structure. Furthermore, when the ventilation device 1 is installed on the aisle side, the protrusion into the aisle is small, which helps to prevent it from obstructing movement in the aisle. 【0025】 Figure 4 is a longitudinal cross-sectional view of the ventilation device 1 shown in Figure 1. The configuration of each part is simplified as appropriate in the illustration. A duct 10 is located inside the fan cover 5. A centrifugal fan 11 is located at the back of the duct 10. As described above, the centrifugal fan 11 is equipped with blades 13 and a motor 12 that rotates the blades 13. The centrifugal fan 11 takes in air horizontally (arrow a) and exhausts it vertically downward (arrow b). The motor 12 is fixed to a support plate 14 with screws (not shown), and the support plate 14 is attached directly or indirectly to the main body cover 3 by rivets 15. 【0026】 Inside the main case 2, below the centrifugal fan 11, an air passage 17 is formed through which air flows from the centrifugal fan 11. An exhaust port 18 is provided at the bottom of the main case 2. The exhaust port 18 may be mesh-like or porous, or it may consist of narrow slits arranged in parallel, to prevent foreign matter from entering from the outside. A filter may also be added to the exhaust port 18. 【0027】 In Figure 4, the centrifugal fan 11 is provided with inclined plates 20a, 20b, and 20c below it. The inclined plates 20a to 20c are inclined so that their tips slope downwards. Of the vertically adjacent inclined plates 20a and 20b, inclined plate 20a has its tip inclined downwards toward one of the opposing surfaces 2b of the main body case 2, and inclined plate 20b has its tip inclined downwards toward the other opposing surface 2a. Similarly, of the vertically adjacent inclined plates 20b and 20c, inclined plate 20b has its tip inclined downwards toward the other surface 2a as described above, and inclined plate 20c has its tip inclined downwards toward the surface 2b of the opposing surface. 【0028】 More specifically, the arrangement of the inclined plates 20a to 20c is as follows: Adjacent inclined plates 20a and 20b are positioned so that the tip of inclined plate 20a faces the inclined surface of inclined plate 20b. Similarly, adjacent inclined plates 20b and 20c are positioned so that the tip of inclined plate 20b faces the inclined surface of inclined plate 20c. 【0029】 The effects of this arrangement of inclined plates 20a to 20c will be described later, but the arrangement of inclined plates 20a to 20c is not limited to the arrangement in which the tip of the upper inclined plate faces the inclined surface of the lower inclined plate. Any arrangement in which one of the vertically adjacent inclined plates has its tip inclined downward toward one of the opposing surfaces 2a and 2b, and the other inclined plate has its tip inclined downward toward the other of the opposing surfaces 2a and 2b. 【0030】 Figure 5 is a perspective view of the centrifugal fan 11. There are no limitations on the type of centrifugal fan 11, but in this embodiment it is a turbo fan. Because a turbo fan pushes out air at high pressure, it has good exhaust efficiency, and sufficient exhaust is possible even if the area of ​​the exhaust port 18 (Figure 4) is small. Reducing the area of ​​the exhaust port 18 is advantageous in preventing outside air, rainwater, insects, and other foreign matter from entering the main body case 2 through the exhaust port 18 when the ventilation device 1 is stopped. 【0031】 The blades 13 of the centrifugal fan 11 rotate around the center line 16 of the blades 13 due to the rotation of the motor 12. As the blades 13 rotate, the air drawn in horizontally (in the direction of arrow a) is exhausted vertically downward (in the direction of arrow c). 【0032】 Figure 6 is a diagram illustrating the operation of the arrangement of inclined plates 20a to 20c. Figures 6(a) and 6(b) correspond to the longitudinal cross-sectional views of the ventilation device 1 shown in Figure 4. Figure 6(a) is a diagram showing the airflow during operation of the ventilation device 1. As described above, the rotation of the blades 13 causes the air taken in horizontally (arrow a) to be exhausted vertically downward (arrow c). The exhausted air flows along inclined plate 20a (arrow d) and hits inclined plate 20b. The air that hits inclined plate 20b flows along inclined plate 20b (arrow e) and hits inclined plate 20c. The air that hits inclined plate 20c flows along inclined plate 20c (arrow f) and is exhausted through the exhaust port 18 (arrows g, b). 【0033】 As described above, when the ventilation device 1 is in operation, the air exhausted from the centrifugal fan 11 flows along the inclined plates 20a to 20c in the air passage 17 and is exhausted through the exhaust port 18. 【0034】 Figure 6(b) shows the airflow when the ventilation device 1 is stopped. When the device is stopped, the exhaust from the centrifugal fan 11 in the vertical downward direction (arrow c in Figure 6(a)) is stopped. In this case, outside air, dust, rainwater, and foreign objects such as insects can easily enter the main body case 2 through the exhaust port 18. The entry of foreign objects such as insects can be prevented by making the exhaust port 18 mesh-like, as described above. 【0035】 On the other hand, since the exhaust port 18 is ventilated, rainwater may enter, and dust and other particles may enter the main body case 2 along with the outside air. However, even if rainwater or dust and other particles enter the main body case 2 along with the outside air, these will be reflected by the inclined plates 20c and 20b in Figure 6(b) and pushed back towards the exhaust port 18. Furthermore, even if rainwater, outside air, etc. rise above the inclined plate 20b, these will be reflected by the inclined plate 20a and pushed back towards the exhaust port 18. 【0036】 As described above, when the ventilation device 1 is stopped, the entry of foreign objects such as insects can be prevented by making the exhaust port 18 mesh-like, and even if rainwater or dust enters with the outside air, these will be pushed back towards the exhaust port 18 by the inclined plates 20a to 20c. Therefore, according to this embodiment, even if dust enters the main body case 2 with the outside air when the ventilation device 1 is stopped, it is possible to prevent these from entering the position of the centrifugal fan 11, which is equipped with the movable blades 13 and the motor 12, which is an electrical component. 【0037】 As in this embodiment, with an inclined plate fixing structure in which the inclined plates 20a to 20c are fixed, the inclined plates 20a to 20c are not movable parts that perform opening and closing operations, so malfunctions such as the movable parts becoming stuck do not occur, and the quality is stable. 【0038】 Furthermore, as shown in the configurations in Figures 4 and 6, when the tip of the upper inclined plate faces the inclined surface of the lower inclined plate, the distance between the inclined plates becomes shorter, which further enhances the effect of preventing dust and other particles from entering the position where the centrifugal fan 11 is installed. 【0039】 Figure 7 is an external perspective view of equipment 30 (cubicle, etc.) equipped with ventilation device 1. Figure 8 is a longitudinal cross-sectional view of equipment 30 shown in Figure 7. In Figure 8, the internal structure of equipment 30 and ventilation device 1 is not shown. In Figure 7, equipment 30 is equipped with a door 31, and ventilation device 1 is installed on the door 31. The door 31 is equipped with an air intake 32 for drawing air into the equipment 30. The location of the air intake 32 shown in Figure 7 is just an example; it may also be installed at the bottom (bottom of the panel) or top (ceiling eaves) of equipment 30. 【0040】 In Figure 8, when the ventilation device 1 is in operation, air is drawn into the equipment 30 through the intake port 32 (arrow p), and the air that flows through the equipment 30 (arrow q) is exhausted through the ventilation device 1 (arrows r, s). 【0041】 Figure 9 is a comparison diagram showing a comparison of the installation dimensions of ventilation device 1 and conventional ventilation device 100. Figure 9 is a diagram in which the outline of conventional ventilation device 100 has been added to the vertical cross-sectional view of Figure 8. Ventilation device 100 has the same configuration as the ventilation device described in Patent Document 2, with an outdoor hood 101 installed outside the room to be ventilated and a fan cover 102 installed inside the room. A propeller fan is installed inside the fan cover 102. 【0042】 The dimensions shown below are examples, but the dimensions of ventilation device 1 are the actual feasible dimensions when manufactured, and the dimensions of ventilation device 100 are the dimensions of the product actually sold. For ventilation device 1, dimension A1 from the surface of door 31 to the inner surface of equipment 30 is 55 mm. For ventilation device 100, dimension A2 from the surface of door 31 to the inner surface of equipment 30 is 150 mm. Also, for ventilation device 1, dimension B1 from the surface of door 31 to the outer surface of equipment 30 is 100 mm. For ventilation device 100, dimension B2 from the surface of door 31 to the outer surface of equipment 30 is 313 mm. 【0043】 As described above, the ventilation device 1 has significantly smaller installation dimensions compared to the ventilation device 100, both on the inside and outside of the equipment 30. This is because the ventilation device 100, which uses a propeller fan, requires a large space behind the propeller fan (towards the outside of the equipment 30) in order to efficiently exhaust air, whereas the ventilation device 1, which uses a centrifugal fan 11, exhausts the air taken in by the centrifugal fan 11 vertically downwards (see arrows q, r, and s in Figure 8), so there is no need to widen the space for exhaust. 【0044】 The ventilation device 1 reduces the internal installation dimensions of the equipment 30, thereby increasing the flexibility of the arrangement of structures and other elements within the equipment 30. Furthermore, the reduced external installation dimensions of the ventilation device 1 create clearance for interference with external structural elements when opening the door 31. Additionally, when the ventilation device 1 is installed on the passageway side, its small protrusion into the passageway minimizes obstruction to movement and other activities in the passageway. Moreover, its slim, simple appearance improves aesthetics. 【0045】 The horizontal installation dimensions of the ventilation device 1 have been described above. As mentioned above, the ventilation device 1 allows for smaller installation dimensions on the external side of the equipment 30. Therefore, even if the vertical length of the main body cover 3 is increased in Figure 9, there is still clearance for interference with external structural parts when opening the door 31, and obstruction of movement in passageways is minimized. The appearance is not significantly compromised. Furthermore, increasing the vertical length of the main body cover 3 not only makes the exhaust flow smoother during operation, but also further enhances the prevention of foreign matter and dust entering the centrifugal fan 11's position when the device is stopped. 【0046】 Figure 10 shows an exploded perspective view of the ventilation device 1. While the longitudinal section view in Figure 4 shows a simplified representation of the main body cover 3, Figure 10 shows it in more detail. The main body cover 3 consists of an outer cover 3a and an inner frame 3b. In the completed state of the ventilation device 1, the inner frame 3b is housed inside the main body cover 3a, and the inner frame 3b is enclosed within the main body cover 3a. 【0047】 Multiple rivets 15 for securing the support plate 14 are attached to the inner frame 3b, and multiple rivets 19 for securing the inclined plates 20a to 20c are attached to the inner frame 3b. Therefore, a large number of rivets are attached to the inner frame 3b. On the other hand, to secure the main body cover 3a to the inner frame 3b, if an interlocking structure between the components is adopted, only about two screws 8 on each side will suffice (see screws 8 in Figure 3). 【0048】 Therefore, according to the configuration of the main body cover 3a shown in Figure 10, only a minimum of screws 8 are needed to attach the main body cover 3a, and the ventilation device 1 attached to the equipment 30 will have a thin and simple appearance as shown in Figure 7, and the number of mounting fixtures visible from the outside will be minimized, resulting in an even better appearance. 【0049】 In the above embodiment, the intrusion of rainwater from the exhaust port 18 was explained with reference to Figure 6(b). On the other hand, since the ventilation device 1 is installed vertically, for example in Figure 7, most of the rainwater falls downward along the surface of the main body cover 3. For this reason, the ventilation device 1 has a configuration that is advantageous for waterproofing. To enhance waterproofing, as shown in Figure 1, a sealant 9 can be attached to the rear panel 4, and as shown in Figure 10, a sealant can be attached to the flange surface of the inner frame 3b. 【0050】 Although one embodiment of the present invention has been described above, the above embodiment is merely an example and may be modified as appropriate. For example, Figure 4 shows three inclined plates 20a to 20c, but the number of inclined plates is not limited to three; any number is acceptable. 【0051】 Furthermore, although the ventilation device 1 is installed on the door 31 of the equipment 30 in Figure 7, it can be installed vertically to exhaust air downwards, and may also be installed on the side or back of the equipment 30. [Explanation of symbols] 【0052】 1. Ventilation system 2. Main unit case 3. Main unit cover 4. Rear panel 5 Fan Cover 11 Centrifugal fan 12 motors 13 feathers 17 Wind path 18 Exhaust vents 20a,20b,20c inclined plate 30 Equipment 31 Doors

Claims

[Claim 1] A ventilation device that exhausts indoor air to the outside to ventilate the room, It is installed vertically so that the exhaust is directed downwards. A centrifugal fan that takes in air horizontally and exhausts it vertically downwards, The main case housing the aforementioned centrifugal fan, An exhaust port formed at the bottom of the main body case, The main body case comprises a plurality of inclined plates positioned vertically below the centrifugal fan, Inside the main case, a passage is formed vertically below the centrifugal fan through which air flows from the centrifugal fan along an inclined plate and is exhausted through an exhaust port. A ventilation device characterized in that, of the vertically adjacent inclined plates, one inclined plate has its tip inclined downward toward one of the opposing surfaces of the main body case, and the other inclined plate has its tip inclined downward toward the other of the opposing surfaces. [Claim 2] The ventilation device according to claim 1, wherein the vertically adjacent inclined plates are arranged such that the tip of the upper inclined plate faces the inclined surface of the lower inclined plate. [Claim 3] The ventilation device according to claim 1, wherein the main body case is a box-shaped structure, and a fan cover having ventilation holes for taking in air to the centrifugal fan is fixed to the main body case, and when the ventilation device is installed, the fan cover is on the indoor side, and only the box-shaped main body case is visible from the outdoor side. [Claim 4] The ventilation device according to claim 3, wherein the main body case includes a main body cover that constitutes the exterior appearance of a box when viewed from the outside, an inner frame is housed inside the main body cover, and the inner frame is enclosed by the main body cover.

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