Fume hood

Abstract

To provide a fume hood which enables easy access to a fluid supply mechanism and enables improvement of maintainability of the fluid supply mechanism.SOLUTION: A fume hood 1 includes a hood body 10. A first side wall part 21 of the hood body 10 includes an inner wall part 33 and an outer wall part 34 which forms a maintenance space S3 with the inner wall part 33. The inner wall part 33 is formed with a first communication opening 35 which may communicate with the maintenance space S3 and a fluid supply mechanism connected to a first nozzle 61 to a third nozzle 63 is provided in the maintenance space S3. Further, the inner wall part 33 is provided with a lid member 18 which opens or closes the first communication opening 35. A rear end edge 18b of the lid member 18 is located rearward of a first baffle plate 91.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to a fume hood. [Background Art]

[0002] For example, when using chemicals, gases, or the like in experiments, fume hoods are used to prevent workers from coming into contact with the gases or the like. It is known that some of these fume hoods are provided with a sink on an inner wall portion forming a working space, a nozzle provided above the sink, and an operation unit corresponding to the nozzle provided on a support column. The operation unit is connected in the middle of a fluid supply mechanism such as a pipe that connects water supply or a gas cylinder to the nozzle, for example. Therefore, by operating the operation unit, fluid such as water or gas can be guided to the nozzle and discharged from the nozzle (see, for example, Patent Document 1). [Prior Art Literature] [Patent Literature]

[0003] [Patent Document 1] Japanese Unexamined Patent Application Publication No. 2015-196137 [Summary of the Invention] [Problem to be Solved by the Invention]

[0004] Here, in the fume hood disclosed in Patent Document 1, a fluid supply mechanism (functional component) such as a pipe connected to the nozzle is located outside a side wall portion forming the working space. Further, a fastening member for fixing the nozzle to the sink is located outside the side wall portion. Therefore, for example, when performing maintenance (inspection and upkeep) of the fluid supply mechanism, or when a problem such as fluid leakage occurs from the fluid supply mechanism, it is necessary to access the fluid supply mechanism from the outside of the fume hood. For this reason, for example, when the fume hood is arranged at a position close to a wall surface of a building or another device (such as another fume hood), access to the fluid supply mechanism has been difficult. Hereinafter, "maintenance, repair of problems, and the like" may be collectively referred to as "maintenance".

[0005] The present invention aims to provide a fume hood that facilitates access to functional components such as fluid supply mechanisms, thereby improving the maintainability of these functional components. [Means for solving the problem]

[0006] (1) To achieve the above objective, a fume hood according to one aspect of the present invention comprises a hood body having an opening that opens forward between a first side wall portion and a second side wall portion located on both the left and right sides, forming an internal hood space that communicates through the opening; a lifting door supported so as to be vertically movable between the first side wall portion and the second side wall portion, which opens and closes the opening; and a baffle plate detachably provided in front of the rear wall portion of the hood body, which partitions the internal hood space into a working space formed between the lifting door and the baffle plate, and an exhaust space formed between the rear wall portion and the baffle plate. The first side wall portion comprises an inner wall portion exposed to the internal space of the hood, and an outer wall portion located outward in the left-right direction relative to the inner wall portion, forming an internal side wall space between itself and the inner wall portion. The inner wall portion has a first communication opening that can communicate with the internal side wall space, and functional components that can be maintained from the internal space of the hood through the first communication opening are provided in the internal side wall space. The inner wall portion is provided with a lid member that opens and closes the first communication opening, and at least the rear edge of the lid member is located behind the baffle plate.

[0007] According to this embodiment, by removing the lid member from the inner wall and opening the first communication opening, the internal space of the side wall can be opened to the internal space of the hood through the first communication opening. Therefore, for example, even when the first side wall of the fume hood is located close to the wall surface of a building, the functional components can be accessed from the internal space of the hood by removing the lid member from the inner wall. This facilitates access to the functional components and improves the maintainability of the functional components. Furthermore, at least the rear edge of the lid member is positioned behind the baffle plate. Therefore, when the baffle plate is attached, it is possible to restrict the removal of the lid member from the inner wall, thereby preventing the lid member from being unintentionally removed from the inner wall. Furthermore, by positioning the rear edge of the lid member behind the baffle plate, the rear edge of the lid member can be hidden by the baffle plate. This improves the aesthetic design of the workspace and ensures a good appearance.

[0008] (2) In the fume hood according to the embodiment of (1) above, a sink having a receiving portion is provided in the portion of the first side wall located within the working space, and a nozzle capable of discharging fluid is provided in the portion of the first side wall located within the working space and above the receiving portion, wherein the internal space of the side wall may include a maintenance space provided with a fluid supply mechanism connected to the nozzle. This configuration allows access to the fluid supply mechanism connected to the nozzle from the inside of the hood. This facilitates access to the fluid supply mechanism and improves its maintainability.

[0009] (3) In a fume hood according to one embodiment of (2) above, the sink is recessed relative to the inner wall, and the nozzle may be provided on the inner surface of the sink that faces forward.

[0010] This configuration allows the nozzle to be positioned closer to the maintenance area. This further improves the maintainability of the fluid supply mechanism. Furthermore, by positioning the nozzle on the forward-facing surface of the sink's inner surface, the lid can be positioned at the rear (back) of the sink. In other words, the lid can be positioned closer to the baffle plate. Therefore, the lid can be made more compact compared to, for example, the case where the lid extends from the top of the sink to the rear of the baffle plate. This allows the lid to be easily attached to and detached from the inner wall, further improving the maintainability of the fluid supply mechanism.

[0011] (4) In a fume hood according to any of the embodiments described in (1) to (3) above, the lid member may be fixed to the first side wall via a fixing member in a portion located behind the baffle plate.

[0012] With this configuration, the fixing members can be removed by removing the baffle plate. This prevents the lid member from being unintentionally removed from the inner wall. Furthermore, by positioning the fixing members behind the baffle plate, the fixing members can be hidden from the workspace by the baffle plate. This improves the aesthetics of the workspace and ensures a good appearance. Furthermore, the fixing members that protrude from the inner wall into the workspace can suppress turbulence in the airflow within the workspace.

[0013] (5) In a fume hood according to any of the embodiments of (1) to (4) above, a balance weight is connected to the lifting door via a wire, the internal space of the side wall includes a guide space for guiding the balance weight in the vertical direction, a second communication opening is formed in the inner wall portion that communicates with the guide space, and the second communication opening may be opened and closed by the lid member.

[0014] With this configuration, by removing the lid from the inner wall, the balance weight can also be accessed from the inside of the hood. This allows for maintenance of the balance weight. Furthermore, at least the rear edge of the lid member is located behind the baffle plate. Therefore, the portion of the inner wall that supports the rear edge of the lid member does not need to be formed in front of the baffle plate. This allows the second communication opening to be opened larger, closer to the baffle plate, and improves the maintainability of the balance weight.

[0015] (6) In a fume hood according to any of the embodiments described in (1) to (5) above, the lid member may be removable from the inner wall.

[0016] According to this configuration, when performing maintenance on functional components (such as a fluid supply mechanism, a balance weight, etc.) by removing the cover member, the cover member can be prevented from interfering with the maintenance. This further improves the maintainability of the functional components.

Effects of the Invention

[0017] According to one aspect of the present invention, access to functional components can be facilitated, thereby improving the maintainability of the functional components.

Brief Description of Drawings

[0018] [Figure 1] A front view showing a fume hood. [Figure 2] A perspective view showing a fume hood. [Figure 3] A perspective view showing the main part of a fume hood. [Figure 4] A cross-sectional view along the line IV-IV in Figure 3. [Figure 5] A perspective view of the fume hood of Figure 3 with the first baffle plate and the cover member removed. [Figure 6] A cross-sectional view along the line VI-VI in Figure 3. [Figure 7] A perspective view of the fume hood with the outer wall portion removed from the first side wall portion. [Figure 8] A cross-sectional view along the line VIII-VIII in Figure 3.

Mode for Carrying Out the Invention

[0019] Next, embodiments of the present invention will be described with reference to the drawings. In the following description, the normal direction of the floor surface (not shown) on which the fume hood 1 is installed is defined as the vertical direction (the arrow UP indicates upward). Further, a direction orthogonal (intersecting) to the vertical direction is defined as a first direction, and a direction orthogonal (intersecting) to the first direction when viewed from the vertical direction is defined as a second direction. The first direction may be referred to as the left-right direction (the arrow LH indicates the left side), and the second direction may be referred to as the front-rear direction (the arrow FR indicates the front side).

[0020] [Fume Hood 1] Figure 1 is a front view of the fume hood 1. Figure 2 is a perspective view of the fume hood 1. The fume hood 1 shown in Figures 1 and 2 is installed in a room such as an experimental facility. The fume hood 1 is used to prevent gases in the internal space S of the hood from leaking into the room during physicochemical experiments. Specifically, the fume hood 1 comprises a workbench 2 and a hood 5 provided on the top plate 3 of the workbench 2. The fume hood 1 is formed by the hood 5 and the top plate 3, with the hood 5 being assembled on the top plate 3 of the workbench 2, thereby defining the internal space S of the hood.

[0021] <Food 5> Figure 3 is a perspective view showing the main parts of the fume hood 1. As shown in Figures 2 and 3, the hood 5 is formed in a box shape that opens downwards. The hood 5 comprises a hood body 10 having an opening 11 that opens forward, an opening / closing mechanism 12 for opening and closing the opening 11, a sink 13 that opens toward the work space S1, a nozzle unit 14 provided on the sink 13, an operating unit 15 for switching between discharging and shutting off fluid from the nozzle unit 14, a fluid supply mechanism 16 (see Figure 7) connecting the nozzle unit 14 and the operating unit 15, a baffle plate unit (baffle plate) 17 that partitions the internal space S of the hood, and a lid member 18 provided on the first side wall portion 21 of the hood body 10.

[0022] <Food body 10> Figure 4 is a cross-sectional view along the line IV-IV in Figure 3. As shown in Figures 2 and 4, the first side wall 21, the second side wall 22, the top wall (not shown), and the rear wall 23 of the hood body 10 are constructed by assembling panels onto a frame material, for example. In this embodiment, metal materials (for example, stainless steel) are used for the frame material of the first side wall 21, the second side wall 22, the top wall, and the rear wall 23. The top wall (not shown) is provided with an exhaust port and an exhaust fan (not shown) for discharging gas from the hood's internal space S. The gas from the hood's internal space S is discharged outside the experimental facility through the exhaust port by driving the exhaust fan (not shown).

[0023] The first side wall portion 21 and the second side wall portion 22 are provided on the top plate 3 of the workbench 2 at intervals on both sides in the left-right direction (left and right sides). The hood body 10 has an opening 11 that opens forward between the first side wall portion 21 and the second side wall portion 22. By being assembled on the top plate 3, the hood body 10 together with the top plate 3 forms an internal hood space S that communicates through the opening 11.

[0024] The internal space S of the hood is divided in the front-to-back direction into a work space S1 and an exhaust space S2 by a baffle plate unit 17. Specifically, the work space S1 is formed in front of the baffle plate unit 17, between the baffle plate unit 17 and the opening 11. The work space S1 is the space where experiments are actually conducted, by inserting the user's hand or other object through the opening 11. The exhaust space S2 is formed between the baffle plate unit 17 and the rear wall 23, behind the baffle plate unit 17. The exhaust space S2 is in communication with the work space S1. The exhaust space S2 serves as a duct for discharging air and other gases from inside the hood's internal space S to the outside of the experimental facility.

[0025] The first side wall section 21 is erected upward from the right side of the top plate 3. The first side wall section 21 comprises a first support column 31 provided as a frame member at its front end, a second support column 32 provided as a frame member at its rear end, and an inner wall section 33 and an outer wall section 34 assembled as panels to the first support column 31 and the second support column 32.

[0026] Figure 5 is a perspective view of the fume hood 1 in Figure 3 with the first baffle plate 91 and lid member 18 removed. As shown in Figures 4 and 5, the inner wall portion 33 defines the internal space S of the hood. The inner wall portion 33 comprises a first inner wall portion 33a and a second inner wall portion 33b positioned inward (towards the internal space S of the hood) in the left-right direction relative to the first inner wall portion 33a. The inner wall portion 33 is formed by overlapping the first inner wall portion 33a and the second inner wall portion 33b in the left-right direction. In this case, the second inner wall portion 33b is exposed to the internal space S of the hood.

[0027] The first inner wall portion 33a has a first communication opening 35 and a second communication opening 36 formed therein. The first communication opening 35 penetrates the portion of the first inner wall 33a that is located behind the sink 13 and in front of the baffle unit 17 in the left-right direction. The first communication opening 35 is formed in a rectangular shape with the vertical direction as its longitudinal direction. The second communication opening 36 is formed in the portion of the first inner wall 33a that is rearward of the first communication opening 35 and in front of the baffle unit 17. The second communication opening 36 is formed in a rectangular shape with the vertical direction as its longitudinal direction. The vertical dimension of the second communication opening 36 is smaller than that of the first communication opening 35. The first communication opening 35 and the second communication opening 36 are aligned in the front-to-back direction.

[0028] The outer wall portion 34 is positioned with a gap to the left and right outward relative to the inner wall portion 33 (first inner wall portion 33a). Of the space formed between the outer wall portion 34 and the inner wall portion 33, the portion located around the sink 13 functions as a maintenance space S3. On the other hand, of the space formed between the outer wall portion 34 and the inner wall portion 33, the portion located behind the maintenance space S3 and in front of the baffle unit 17 functions as a guide space S4. The guide space S4 extends across the entire vertical direction of the first side wall portion 21 between the outer wall portion 34 and the inner wall portion 33. The maintenance space S3 and the guide space S4 constitute the internal side wall space of this embodiment.

[0029] When viewed from the left and right, the maintenance space S3 overlaps with the first communication opening 35 in at least a portion of its area. That is, the first communication opening 35 is an opening that connects the maintenance space S3 to the hood internal space S. Furthermore, the maintenance space S3 extends vertically along the sink 13 behind the sink 13. When viewed from the left and right, at least a portion of the guide space S4 overlaps with the second communication opening 36. That is, the second communication opening 36 is an opening that connects the guide space S4 to the hood internal space S. In addition, the guide space S4 extends vertically along the second support column 32 in front of the second support column 32.

[0030] As shown in Figure 2, the second side wall 22 is erected upward from the left side of the top plate 3. Since the second side wall 22 is constructed to be roughly symmetrical with the first side wall 21, the same reference numerals as those used for the first side wall 21 are used for each component, and a detailed explanation is omitted.

[0031] <Opening / closing mechanism 12> As shown in Figures 2 and 5, the opening / closing mechanism 12 is supported between the first side wall portion 21 and the second side wall portion 22. The opening / closing mechanism 12 includes a lifting door 37 that opens and closes the opening 11, a balance weight 38 that balances the lifting door 37, and a wire 39 that connects the lifting door 37 and the balance weight 38. The lifting door 37 is supported so as to be movable in the vertical direction by the first support column 31 of the first side wall 21 and the first support column 31 of the second side wall 22. The lifting door 37 opens and closes the opening 11 by moving in the vertical direction. The balance weight 38 is housed in the guide space S4 so as to be movable in the vertical direction. The wire 39 is wrapped around a pulley 40 provided between the inner wall 33 and the outer wall 34. The first end of the wire 39 is connected to the lifting door 37. The second end of the wire 39 is connected to the balance weight 38. The opening and closing mechanism 12 moves the lifting door 37 and the balance weight 38 vertically as the wire 39 moves along the pulley 40.

[0032] <Think 13> As shown in Figures 3 and 4, the sink 13 is provided in the inner wall portion 33 (particularly the first inner wall portion 33a) of the first side wall portion 21. The sink 13 has a recess 41 positioned between the inner wall portion 33 and the outer wall portion 34 of the first side wall portion 21, and a protruding portion 42 provided at the opening of the recess 41.

[0033] The recess 41 is formed in a rectangular frame by a front portion 45, a rear portion 46, an upper portion 47, and a lower portion 48. The rear portion 46 is the inner surface of the sink 13 facing forward (towards the opening 11). The recess 41 is closed off on the opposite side (right side) of the work space S by a side wall portion 49. That is, the recess 41 is recessed outward (to the right) in the leftward direction relative to the inner wall portion 33 (see Figure 3) of the first side wall portion 21, and opens on the same plane as the surface of the inner wall portion 33.

[0034] The protruding portion 42 is provided at the opening edge of the recess 41. The protruding portion 42 has a flange 52 that protrudes from the opening edge of the recess 41 flush with the inner wall portion 33, and a cover portion 53 that covers the opening at the lower part of the recess 41. The flange 52 is formed in the shape of a rectangular frame by protruding outward from the opening edge of the recess 41. The cover portion 53 is formed integrally with the flange 52 at the lower part of the recess 41. The cover portion 53 covers the opening at the lower part of the recess 41, and together with the lower part of the recess 41, forms a receiving portion 43. In other words, the sink 13 has a receiving portion 43 at the lower part of the recess 41.

[0035] The receiving section 43 is located at the bottom of the sink 13 and opens upward within the recess 41. A drain opening 54 (see also Figure 6) is provided in the part of the receiving section 43 located at the lower end of the rear section 46. Waste liquids and other materials accumulated in the receiving section 43 are discharged through the drain opening 54 to an external drain pipe (not shown). The drain opening 54 may also open at the bottom section 48.

[0036] <Nozzle Unit 14> The nozzle unit 14 includes a first nozzle 61, a second nozzle 62, and a third nozzle 63. Here, the rear surface 46 of the recess 41 is the portion of the first side wall 21 located within the working space S1. That is, the first nozzle 61, the second nozzle 62, and the third nozzle 63 are provided on the portion of the first side wall 21 located within the working space S1. Furthermore, the rear surface 46 of the recess 41 is the surface facing forward on the inner surface of the sink 13. That is, the first nozzle 61, the second nozzle 62, and the third nozzle 63 are positioned facing forward by being provided on the rear surface 46.

[0037] Figure 6 is a cross-sectional view along the line VI-VI in Figure 3. As shown in Figures 3 and 6, the first nozzle 61 is provided in the portion of the rear surface 46 located above (directly above) the receiving portion 43, penetrating the rear surface 46. The first nozzle 61 has a discharge portion 61a capable of discharging a liquid, such as water, as the first fluid. The first nozzle 61 is bent in an L-shape when viewed from the side. Specifically, the first nozzle 61 extends forward from the rear surface 46 and then bends downward at a 90° angle. Therefore, the discharge portion 61a faces the receiving portion 43 in the vertical direction.

[0038] The second nozzle 62 is provided in the rear surface portion 46, located above the first nozzle 61, and penetrates the rear surface portion 46. The second nozzle 62 has a discharge portion 62a capable of discharging a gas, such as nitrogen gas, as a second fluid. The second nozzle 62 extends forward from the rear surface portion 46 and then bends downward. The bending angle of the second nozzle 62 is greater than that of the first nozzle 61. Therefore, the discharge portion 62a of the second nozzle 62 faces forward more than the discharge portion 61a of the first nozzle 61.

[0039] The third nozzle 63 is provided in the rear portion 46, located above the second nozzle 62, and penetrates the rear portion 46. The third nozzle 63 has a discharge section 63a capable of discharging a gas other than the third fluid, for example, as the third fluid. Similar to the second nozzle 62, the discharge section 63a of the third nozzle 63 is bent at a greater bending angle than that of the first nozzle 61. The first nozzle 61, the second nozzle 62, and the third nozzle 63 are arranged vertically on the rear surface 46.

[0040] <Operation unit 15, fluid supply mechanism 16> Figure 7 is a perspective view of the fume hood 1 with the outer wall portion 34 removed from the first side wall portion 21. As shown in Figures 3, 4, and 7, the operating unit 15 includes a first operating section 71, a second operating section 72, and a third operating section 73, which are provided on the front section 31a of the first support column 31 of the first side wall section 21. The front section 31a is located outside the working space S1. That is, the first operating section 71, the second operating section 72, and the third operating section 73 are provided on the front section 31a of the first support column 31, thereby being located outside the working space S1. In a plan view, the front section 31a extends rearward as it moves inward in the left-right direction. However, the front section 31a may extend linearly in the left-right direction. The first operating section 71, the second operating section 72, and the third operating section 73 are arranged vertically on the front surface 31a of the first support column 31.

[0041] The operating unit 15 is connected to the nozzle unit 14 via a fluid supply mechanism (functional component) 16. The fluid supply mechanism 16 is connected to both the operating unit 15 and the nozzle unit 14. Specifically, the main part 16a of the fluid supply mechanism 16 is located in the maintenance space S3 and is connected to the nozzle unit 14 in the maintenance space S3. The fluid supply mechanism 16 includes a first connecting pipe (flow path) 81, a second connecting pipe (flow path) 82, and a third connecting pipe (flow path) 83. The fluid supply mechanism 16 also includes a first supply pipe (flow path) 85, a second supply pipe (flow path) 86, and a third supply pipe (flow path) 87.

[0042] The first operating unit 71 is connected to the first nozzle 61 via a first connecting pipe 81. Specifically, the main part of the first connecting pipe 81 is connected to the first nozzle 61 in a maintenance space S3. The first operating unit 71 is also connected to a supply source (not shown) that supplies the first fluid via a first supply pipe 85. The first operating unit 71 is a valve that switches the discharge and shut-off of the first fluid flowing to the first nozzle 61 from the discharge unit 61a and the amount of discharge.

[0043] The second operating section 72 is connected to the second nozzle 62 via a second connecting pipe 82. Specifically, the main part of the second connecting pipe 82 is connected to the second nozzle 62 in a maintenance space S3. The second operating section 72 is also connected to a supply source (not shown) that supplies the second fluid via a second supply pipe 86. The second operating section 72 is a valve that switches the discharge and shut-off of the second fluid flowing to the second nozzle 62 from the discharge section 62a and the amount of discharge.

[0044] The third operating section 73 is connected to the third nozzle 63 via a third connecting pipe 83. That is, the main part of the third connecting pipe 83 is connected to the third nozzle 63 in a maintenance space S3. The third operating section 73 is also connected to a supply source (not shown) that supplies the third fluid via a third supply pipe 87. The third operating section 73 is a valve that switches the discharge and shut-off of the third fluid flowing to the third nozzle 63 from the discharge section 63a and the amount of discharge.

[0045] Here, the main parts of the first connecting pipe 81, the second connecting pipe 82, and the third connecting pipe 83 are connected to the first nozzle 61, the second nozzle 62, and the third nozzle 63 in the maintenance space S3. The main parts of the first connecting pipe 81, the second connecting pipe 82, and the third connecting pipe 83 constitute the main part 16a of the fluid supply mechanism 16. Hereinafter, the main parts of the first connecting pipe 81, the second connecting pipe 82, and the third connecting pipe 83 may be referred to as the main part 16a of the fluid supply mechanism 16. In this embodiment, the connecting pipes 81-83 and the supply pipes 85-87 are routed in the maintenance space S3, straddling the top of the sink 13 and extending to both sides of the sink 13 in the front-rear direction. However, each connecting pipe 81-83 and supply pipe 85-87 may be routed across the bottom of the sink 13, or each connecting pipe 81-83 and supply pipe 85-87 may be routed separately above and below the sink 13.

[0046] In this embodiment, the nozzle unit 14 is described as having three nozzles, from the first nozzle 61 to the third nozzle 63, and the operation unit 15 is described as having three operation units, from the first operation unit 71 to the third operation unit 73. However, the configuration is not limited to this. For example, the number of nozzles and operation units may be single, or multiple of each other.

[0047] <Baffle plate unit 17> Figure 8 is a cross-sectional view along the line VIII-VIII in Figure 3. As shown in Figures 2 and 8, the baffle plate unit 17 comprises a first baffle plate 91 provided in front of the rear wall portion 23 and a second baffle plate 92 provided above the first baffle plate 91. The first baffle plate 91 is detachably provided in front of the rear wall portion 23 by fastening portions 94. Specifically, the fastening portions 94 detachably fix the first baffle plate 91 and the rear wall portion 23 via a plurality of spacers (not shown) positioned between the rear wall portion 23 and the first baffle plate 91. At the upper and lower ends of the first baffle plate 91, the fastening portions 94 are configured such that a plurality of fixing screws 95 (see also Figure 1) that penetrate the first baffle plate 91, the plurality of spacers, and the rear wall portion 23 are screw-connected to nuts (not shown).

[0048] A gap 90 is formed between the first baffle plate 91 and the top plate 3. In addition, multiple slits 91a are formed in the lower part of the first baffle plate 91. The working space S1 and the exhaust space S2 are in communication through the gap 90 and the slits 91a.

[0049] The second baffle plate 92 has an upper baffle portion (not shown) detachably fixed to the upper wall portion (not shown) of the hood body 10, and an inclined baffle portion 92a is bent towards the rear from the rear end of the upper baffle portion. The lower end of the inclined baffle portion 92a is secured to a plurality of hooks 96 (see also Figure 1). The plurality of hooks 96 are fastened together with fixing screws 95 that fix the upper end of the first baffle plate 91 to the rear wall portion 23. A gap 95 is formed in the front-rear direction between the lower end of the inclined baffle portion 92a and the upper end of the first baffle plate 91 (see Figure 3). The gap 95 connects the working space S1 and the exhaust space S2.

[0050] In this configuration, the baffle plate unit 17 is positioned to divide the hood's internal space S into a work space S1 and an exhaust space S2. The work space S1 is formed in front of the baffle plate unit 17. Specifically, the work space S1 is formed between the baffle plate unit 17 and the lifting door 37. The exhaust space S2 is formed behind the baffle plate unit 17. Specifically, the exhaust space S2 is formed between the baffle plate unit 17 and the rear wall 23.

[0051] <Lid member 18> As shown in Figures 5 and 8, the lid member 18 is provided on the first inner wall portion 33a of the first side wall portion 21 from the hood internal space S side. The lid member 18 has a front edge 18a that contacts the rear edge 52a of the flange 52, a rear edge 18b that contacts the rear wall portion 23, an upper edge 18c that is at the same height as the upper edge 52b of the flange 52, and a lower edge 18d that is at the same height as the lower edge 52c of the flange 52. The lid member 18 has a rectangular shape when viewed from the left and right directions.

[0052] The lid member 18 is detachably fastened from the outside in the left-right direction to a nut (not shown) provided on the front edge 18a of the first communication opening 35. The rear edge 18b of the lid member 18 is detachably fastened from the inside in the left-right direction to a nut (not shown) provided on the portion of the first inner wall 33a located behind the guide space S4, by a plurality (two in this embodiment) of fixing screws (fixing members) 98. In this way, the lid member 18 is detachably attached to the first inner wall 33a. When the lid member 18 is attached to the first inner wall 33a, it is positioned flush with the second inner wall 33b of the inner wall 33. The lid member 18 may also be fixed to the inner wall 33 by the fixing screws 98 alone.

[0053] When the lid member 18 is attached to the first inner wall portion 33a, it covers the first communication opening 35 and the second communication opening 36 together from the inside in the left-right direction. On the other hand, by removing the lid member 18 from the first inner wall portion 33a, both the first communication opening 35 and the second communication opening 36 are opened to the hood internal space S. When the first communication opening 35 is opened, the maintenance space S3 communicates with the hood internal space S (work space S1) via the first communication opening 35. When the second communication opening 36 is opened, the guide space S4 communicates with the exhaust space S2 (hood internal space S). When the lid member 18 is attached to the first inner wall portion 33a, it is preferable that the space between the outer edge of the lid member 18 and the second inner wall portion 33b is filled with a sealing material such as caulking.

[0054] The lid member 18 is positioned to straddle the first baffle plate 91 in the front-rear direction when viewed from the left-right direction. Specifically, the rear end edge 18b of the lid member 18 is located behind the first baffle plate 91 and is fixed by a fixing screw 98. The first baffle plate 91 is also close to or in contact with the lid member 18 in the left-right direction. Therefore, when the lid member 18 is attached to the first inner wall portion 33a, access to the fixing screw 98 is restricted by the first baffle plate 91, and inward displacement of the lid member 18 in the left-right direction relative to the inner wall portion 33 is restricted.

[0055] Next, we will explain the case of conducting the experiment using fume hood 1, based on Figures 2 to 4. First, as shown in Figures 2 to 4, the lifting door 37 is raised by a predetermined amount, opening a portion of the opening 11. When the lifting door 37 is raised, the balance weight 38 moves downward within the guide space S4. The balance weight 38 is balanced with respect to the lifting door 37. Therefore, it becomes possible to raise and lower the lifting door 37 smoothly and accurately.

[0056] After raising the lifting door 37 to open a portion of the opening 11, an exhaust fan (not shown) is activated. As a result, air and gases in the work space S1 are drawn into the exhaust space S2 through gaps 90, 95 and slit 91a. The air and gases drawn into the exhaust space S2 are discharged outside the experimental facility through the exhaust port. While air and gases in the work space S1 are discharged through the exhaust port, air is introduced into the work space S from the opening 11.

[0057] In this state, by operating the selected operating unit from the first to third operating units 71 to 73, a fluid such as liquid or gas is discharged into the sink 13 from the nozzle corresponding to the selected operating unit. This makes it possible to conduct experiments using various fluids within the workspace S1. At this time, any liquid discharged from the discharge unit 61a that cannot be received by the experimental equipment is collected in the receiving unit 43 and then discharged to the outside through the drain port 54. On the other hand, any gas discharged from the discharge unit 62a or discharge unit 63a that cannot be received by the experimental equipment is discharged outside the experimental facility through an exhaust port (not shown) along with the air in the workspace S1.

[0058] Next, the maintenance method for the fluid supply mechanism 16 and the balance weight 38 will be described. When maintaining the fluid supply mechanism 16 and the balance weight 38, it is necessary to remove the cover member 18 and open the first communication opening 35 and the second communication opening 36. First, remove the fixing screw 95 and remove the first baffle plate 91 from the rear wall portion 23. This opens the inside of the cover member 18 in the left and right directions. Next, remove the fixing screw 98 and remove the cover member 18 from the inner wall portion 33. This opens the first communication opening 35 and the second communication opening 36. Then, by accessing the maintenance space S3 through the first communication opening 35, the fluid supply mechanism 16 can be maintained. In addition, by accessing the guide space S4 through the second communication opening 36, the balance weight 38 can be maintained.

[0059] As described above, in this embodiment, the main part 16a of the fluid supply mechanism 16 is provided in the maintenance space S3 formed between the inner wall portion 33 and the outer wall portion 34 of the first side wall portion 21. A first communication opening 35 that can communicate with the maintenance space S3 is formed in the inner wall portion 33 (specifically, the first inner wall portion 33a), and a lid member 18 that can open and close the first communication opening 35 is provided in the first inner wall portion 33a. With this configuration, by removing the lid member 18 from the first inner wall portion 33a and opening the first communication opening 35, the maintenance space S3 can be opened to the hood internal space S side through the first communication opening 35. Therefore, for example, even when the first side wall portion 21 is located close to the wall surface of a building, by removing the lid member 18 from the inner wall portion 33, the main part 16a of the fluid supply mechanism 16 connected to the nozzle unit 14 can be accessed from the hood internal space S side. This makes it easier to access the fluid supply mechanism 16 and improves the maintainability of the fluid supply mechanism 16.

[0060] Furthermore, the rear end edge 18b of the lid member 18 is positioned behind the first baffle plate 91. With this configuration, when the first baffle plate 91 is attached, the removal of the lid member 18 from the inner wall portion 33 can be restricted. This prevents the lid member 18 from being unintentionally removed from the inner wall portion 33. Furthermore, by positioning the rear edge 18b of the lid member 18 behind the first baffle plate 91, the rear edge 18b of the lid member 18 can be hidden by the first baffle plate 91. This improves the aesthetic design of the workspace S1 and ensures a good appearance for the workspace S1.

[0061] In this embodiment, the sink 13 is recessed outward in the left-right direction relative to the inner wall portion 33 of the first side wall portion 21 (i.e., outside the work space S1). This configuration prevents the sink 13 from protruding into the work space S1 (i.e., the hood internal space S), thereby allowing for a larger hood internal space S. This further improves the maintainability of the fluid supply mechanism 16.

[0062] In this embodiment, the first nozzle 61, the second nozzle 62, and the third nozzle 63 are provided on the rear surface 46 of the inner surface of the sink 13, which faces forward. This configuration allows the first nozzle 61 to the third nozzle 63 to be positioned closer to the maintenance space S3. This further improves the maintainability of the fluid supply mechanism 16. Furthermore, by providing the first nozzle 61 to the third nozzle 63 on the rear surface 46 of the sink 13, the lid member 18 can be provided on the rear side (back side) of the sink 13. In other words, the lid member 18 can be provided closer to the first baffle plate 91. Therefore, the shape of the lid member 18 can be made more compact compared to, for example, the case where the lid member 18 extends from the top of the sink 13 to the rear of the first baffle plate 91. As a result, the lid member 18 can be easily attached to and detached from the inner wall portion 33, further improving the maintainability of the fluid supply mechanism 16.

[0063] In this embodiment, the fixing screw 98 is positioned behind the first baffle plate 91. With this configuration, the fixing screws 98 can be removed by removing the first baffle plate 91. This prevents the lid member 18 from being unintentionally removed from the inner wall portion 33. Furthermore, the fixing screws 98 can be hidden from the workspace S1 by the first baffle plate 91. This improves the aesthetic appearance of the workspace S1 and ensures a good appearance for the workspace S1. In addition, the fixing screws 98 that protrude from the inner wall portion 33 into the working space S1 can suppress turbulence in the airflow of the working space S1.

[0064] In this embodiment, a second communication opening 36 that can communicate with the guide space S4 that guides the balance weight 38 is formed in the first inner wall portion 33a, and the second communication opening 36 is configured to be openable and closable by a cover member 18. With this configuration, by removing the lid member 18 from the first inner wall portion 33a, the balance weight 38 and wire 39, in addition to the fluid supply mechanism 16, can be accessed from the hood's internal space S side. This allows maintenance of the opening and closing mechanism 12 (balance weight 38 and wire 39) to be performed.

[0065] Furthermore, the rear edge 18b of the lid member 18 is located behind the first baffle plate 91. Therefore, the portion of the inner wall 33 that supports the rear edge 18b of the lid member 18 is not formed in front of the first baffle plate 91. This allows the second communication opening 36 to be opened larger, closer to the first baffle plate 91, and improves the maintainability of the opening and closing mechanism 12.

[0066] In this embodiment, the lid member 18 is configured to be removable. With this configuration, when performing maintenance on the fluid supply mechanism 16 or the opening / closing mechanism 12 by removing the cover member 18, the cover member 18 does not get in the way of maintenance. This further improves the maintainability of the fluid supply mechanism 16 and the opening / closing mechanism 12.

[0067] Although embodiments of the fume hood 1 according to the present invention have been described above, the present invention is not limited to the above embodiments and can be modified as appropriate without departing from the spirit of the invention. For example, in the embodiment described above, the sink 13 is recessed to the left and outward (i.e., outside the workspace S1) relative to the inner wall portion 33 of the first side wall portion 21, but the configuration is not limited to this. For example, the sink 13 can be made to protrude from the inner wall portion 33 of the first side wall portion 21 toward the workspace S1.

[0068] In the embodiment described above, a configuration was described in which the first nozzle 61, the second nozzle 62, and the third nozzle 63 are provided on the first side wall portion 21, and the first operating section 71, the second operating section 72, and the third operating section 73 are also provided on the first side wall portion 21. However, the configuration is not limited to this. For example, it is also possible to provide the first nozzles 61 to the third nozzles 63 on the first side wall portion 21, and the first operating sections 71 to the third operating sections 73 on the second side wall portion 22.

[0069] In the embodiment described above, the configuration in which the first nozzle 61 to the third nozzle 63 are arranged vertically on the rear surface portion 46 facing the opening 11 side of the sink 13 was explained, but it is also possible to arrange the first nozzle 61 to the third nozzle 63 in the front-to-back direction.

[0070] In the embodiment described above, a configuration was described in which the first nozzle 61 to the third nozzle 63 are provided on the first side wall portion 21, and the first operating section 71 to the third operating section 73 are also provided on the first side wall portion 21. However, the configuration is not limited to this. For example, it is possible to separately provide nozzles on the second side wall portion 22 in addition to the first side wall portion 21, and to separately provide operating sections on the second side wall portion 22 as well.

[0071] In the embodiment described above, a configuration was described in which the first nozzle 61 to the third nozzle 63 are provided on the rear surface 46 of the sink 13, but the configuration is not limited to this. For example, it is also possible to provide the first nozzle 61 to the third nozzle 63 on the surface of the first side wall 21 facing the second side wall 22 (for example, the side wall 49 of the sink 13).

[0072] In the embodiment described above, a configuration was described in which a liquid is discharged as the first fluid from the first nozzle 61, a gas is discharged as the second fluid from the second nozzle 62, and a gas is discharged as the third fluid from the third nozzle 63. However, the configuration is not limited to this. For example, the fluids discharged from the first nozzle 61 to the third nozzle 63 are not limited to liquids or gases.

[0073] In the embodiment described above, a configuration was described in which the first operation section 71 to the third operation section 73 are provided on the front portion 31a of the first support column 31 of the first side wall 21, but the configuration is not limited to this. For example, the first operation section 71 to the third operation section 73 can be provided on a portion other than the front portion 31a of the first support column 31.

[0074] In the embodiment described above, a configuration was described in which the lid member 18 is detachably attached to the inner wall portion 33 of the first side wall portion 21 (specifically, the first inner wall portion 33a) by a hook (not shown) or fixing screw 98, but the configuration is not limited to this. For example, the lid member 18 may be attached to the inner wall portion 33 via a hinge or the like to open and close the communication openings 35 and 36.

[0075] In the embodiment described above, a configuration was described in which the rear edge 18b of the lid member 18 is positioned behind the first baffle plate 91, but the configuration is not limited to this. For example, it is also possible to position the entire lid member 18 behind the first baffle plate 91.

[0076] In the embodiment described above, a configuration in which the lid member 18 is provided on the rear (back) side of the sink 13 was explained, but the configuration is not limited to this. For example, the first nozzles 61 to the third nozzles 63 may be provided on the upper surface 47 of the sink 13, and the lid member 18 may extend from the upper side of the sink 13 to the rear of the first baffle plate 91. Also, the lid member 18 may be located in front of or below the sink 13, as long as at least a part of it is located behind the baffle unit 17. In the embodiments described above, various types of piping were used as examples of the fluid supply mechanism 16 housed in the maintenance space S3, but the configuration is not limited to this. The fluid supply mechanism 16 housed in the maintenance space S3 may also be a valve, various sensors, or the like. In the embodiments described above, a configuration was described in which the communication openings 35 and 36 are located in front of the baffle unit 17, but the configuration is not limited to this. The communication openings 35 and 36 may be located behind the baffle unit 17.

[0077] In the embodiment described above, a configuration was described in which the lid member 18 is fixed via fixing screws 98 in a portion located behind the baffle unit 17, but the configuration is not limited to this. The lid member 18 may also be fixed via fixing members in a portion located in front of the baffle unit 17. In the embodiment described above, a configuration was described in which the lid member 18 closes both the first communication opening 35 and the second communication opening 36 together, but the configuration is not limited to this. The lid member 18 only needs to close at least the first communication opening 35. Alternatively, the first communication opening 35 and the second communication opening 36 may each be closed by separate lid members. In the embodiment described above, a configuration in which the balance weight 38 is housed in the guide space S4 was described, but the embodiment is not limited to this configuration. In the above-described embodiment, the internal space of the side wall was explained using, as an example, a maintenance space S3 in which the main part 16a of the fluid supply mechanism 16 is provided, and a guide space S4 in which the balance weight 38 is housed, but the configuration is not limited to this. The internal space of the side wall may also be provided with wiring (for controlling the fume hood 1, for displaying the status of the fume hood 1, for supplying power to the internal space S of the hood, etc.), operation control devices for the fume hood 1 (status detection control device / status notification control device for the fume hood 1, operation control device for the exhaust mechanism, lighting control device, power supply control device for the internal space S of the hood, etc.), and other functional components.

[0078] Furthermore, without departing from the spirit of the present invention, the components in the above embodiments may be replaced with well-known components as appropriate, and the above-described modifications may be combined as appropriate. [Explanation of Symbols]

[0079] 1…Fume hood 10… Hood body 11…Opening 13…Sink 16… Fluid supply mechanism (functional component) 16a…Main parts (functional components) of the fluid supply mechanism 17... Baffle plate unit (baffle plate) 18... Lid component 18b...rear edge 21...First side wall section 22...Second side wall section 23...Rear wall part 33...Inner wall portion (the part of the first side wall portion located within the workspace) 33a...First inner wall part 34…Outer wall part 35...1st communication opening 36…Second communication opening 37... Elevating door 38... Balance weight 43... Receiving part 46...Rear section (the part of the first side wall located within the workspace, the side facing the opening) 61…First nozzle (nozzle) 62...Second nozzle (nozzle) 63…Third nozzle (nozzle) 91...First baffle plate 98... Fixing screw (fixing component) S... Hood interior space S1…Work space S2... Exhaust space S3…Maintenance space (internal space within the side wall) S4… Guide space (internal space of the side wall)

Claims

1. A hood body having an opening that opens forward between the first and second side walls located on both the left and right sides, forming an internal hood space that communicates through the opening, A lifting door is supported between the first side wall and the second side wall so as to be movable in the vertical direction, and opens and closes the opening. The hood body is detachably provided in front of the rear wall and includes a baffle plate that partitions the internal space of the hood, separating the working space formed between it and the lifting door, and the exhaust space formed between it and the rear wall. The first side wall portion is, The inner wall portion exposed in the internal space of the hood, The system comprises an outer wall portion located outward in the left-right direction relative to the inner wall portion, and forming an internal side wall space between itself and the inner wall portion, The inner wall portion is formed with a first communication opening that can communicate with the internal space of the side wall. Within the internal space of the side wall, functional components that can be maintained from the internal space of the hood through the first communication opening are provided. The inner wall portion is provided with a lid member that opens and closes the first communication opening. A fume hood in which at least the rear edge of the lid member is located behind the baffle plate.

2. A sink having a receiving portion is provided in the portion of the first side wall located within the working space, The portion of the first side wall located within the working space, provided above the receiving portion, comprises a nozzle capable of discharging fluid, The fume hood according to claim 1, wherein the internal space of the side wall includes a maintenance space provided with a fluid supply mechanism connected to the nozzle.

3. The sink is recessed relative to the inner wall portion, The fume hood according to claim 2, wherein the nozzle is provided on the front-facing surface of the inner surface of the sink.

4. The fume hood according to any one of claims 1 to 3, wherein the lid member is fixed to the first side wall via a fixing member in a portion located behind the baffle plate.

5. A balance weight is connected to the aforementioned lifting door via a wire. The internal space of the side wall includes a guide space for guiding the balance weight in the vertical direction. A second communication opening is formed in the inner wall portion, which communicates with the guide space. The fume hood according to any one of claims 1 to 3, wherein the second communication opening is opened and closed by the lid member.

6. The fume hood according to any one of claims 1 to 3, wherein the lid member is removable from the inner wall portion.

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