WO2015166947A1 - Exhaust device - Google Patents

Exhaust device Download PDF

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Publication number
WO2015166947A1
WO2015166947A1 PCT/JP2015/062829 JP2015062829W WO2015166947A1 WO 2015166947 A1 WO2015166947 A1 WO 2015166947A1 JP 2015062829 W JP2015062829 W JP 2015062829W WO 2015166947 A1 WO2015166947 A1 WO 2015166947A1
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WO
WIPO (PCT)
Prior art keywords
air
port
blower
exhaust device
suction port
Prior art date
Application number
PCT/JP2015/062829
Other languages
French (fr)
Japanese (ja)
Inventor
真弘 近藤
光次郎 渡
清水　晃治
田村　秀樹
Original Assignee
株式会社Ｌｉｘｉｌ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社Ｌｉｘｉｌ filed Critical 株式会社Ｌｉｘｉｌ
Publication of WO2015166947A1 publication Critical patent/WO2015166947A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/20—Removing cooking fumes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
    • F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit

Definitions

  • the present invention relates to an exhaust device that sucks and discharges contaminants such as oil smoke.
  • a general exhaust device includes a hood portion and an exhaust fan that sucks and exhausts air in the hood portion.
  • the hood portion is formed with an introduction port that opens toward the cooking device.
  • the contaminants sucked into the hood part are usually captured by a capturing member such as a filter.
  • contamination may occur in the hood due to contaminants upstream from the place where the capture member is installed, and there is room for improvement in the conventional exhaust system.
  • This invention is made in view of such a subject, and the objective is to provide the exhaust apparatus which can suppress generation
  • an exhaust device includes an inlet opening that opens toward an external space and a suction opening that opens at a depth side from the inlet, and the inside of the collection space
  • a hood portion provided with a fan, a blower capable of sucking air in the collection space through the suction port, a cover member that covers the collection space from the introduction port side, and an air intake portion for taking air in the external space into the collection space
  • the hood portion is provided with a blower port for discharging a layered air flow along a back wall surface on the back side from the intake portion.
  • the air flow discharged from the air blowing port functions as an air curtain, and the air flow suppresses the approach of the contaminated air to the inner wall surface. It is done. Therefore, it is possible to prevent the contamination contained in the contaminated air from adhering to the inner wall surface, and to suppress the occurrence of dirt in the hood portion.
  • the exhaust device may be configured so that a part of the air discharged from the blower can be supplied to the blower opening. According to this aspect, it is not necessary to install a drive system for supplying air to the air outlet separately from the air blower.
  • the exhaust device may be further provided with a capturing member that is installed in a flow path from the collection space to the air blowing port via the blower and capable of capturing contaminants contained in the air.
  • the cleaned airflow can be discharged from the blower opening, and the contaminants can be prevented from adhering to the inner wall surface due to the airflow.
  • the air blowing port may be provided so as to be annularly connected along the circumferential direction around the suction port. According to this aspect, it becomes easy to suppress adhesion of contaminants in a wide range of the back wall surface of the hood portion.
  • the exhaust device forms an air supply path for supplying air to the air blowing port, and is arranged with a first opposed wall portion and a second opposed wall portion spaced apart from each other, and a first opposed wall portion and a second opposed wall.
  • a connecting member that connects the air flow direction changing unit for changing the air flow direction of the airflow flowing through the air supply path, and the connecting member is upstream of the airflow direction changing unit. Provided on the downstream side of the airflow direction changing portion. According to this aspect, even when the air flow in the air supply path is divided by the connection member, the air flow is diffused when the air flow direction is changed by the air flow direction changing unit, and the air flow in a state where the air flow is not divided is It becomes easy to exhale.
  • a plurality of connecting members may be provided along the airflow direction of the airflow flowing through the air supply path. According to this aspect, the airflow flowing through the air supply path can be rectified by the plurality of connecting members, the flow of the airflow entering the airflow direction changing unit is stabilized, and the laminar airflow is easily discharged from the blower port.
  • the air intake portion may be provided on the cover member at a position away from the air blowing port toward the suction port when viewed from the direction along the central axis of the suction port.
  • the back wall surface may be provided so as to extend from the air blowing port to the suction port, and may include a flat portion extending linearly so as to straddle the air blowing port. According to this aspect, since it becomes easy to maintain the layer thickness of the air flow discharged from the air outlet, it becomes easy to suppress the approach of the contaminated air taken in from the intake portion to the back wall surface, and the adhesion of contaminants to the back wall surface is prevented. It becomes easy to suppress.
  • the occurrence of dirt in the hood portion can be suppressed.
  • FIG. 1 is a side view showing a use state of the exhaust device 10 according to the embodiment.
  • the exhaust device 10 is a range hood and is installed in the indoor space 201.
  • a heating cooker 203 such as an electromagnetic cooker is installed in the indoor space 201.
  • 2 and 3 are a side sectional view and a front sectional view of the exhaust device 10, respectively.
  • 2 shows an XZ plane sectional view as seen from the Y direction in FIG. 1
  • FIG. 3 shows a YZ plane sectional view as seen from the X direction in FIG.
  • the directions X and Y are referred to as the front-rear direction X and the left-right direction Y, respectively, and the vertical direction perpendicular thereto is referred to as the up-down direction Z.
  • the XY plane is a horizontal plane.
  • the exhaust device 10 includes a first housing 12, a hood portion 14, a capturing member 16, a second housing 18, a blower 20, and a cover member 22. Since most of the configurations shown in FIGS. 2 and 3 are common, description will be made with reference mainly to FIG.
  • the first housing 12 is formed in a flat box shape, and a hood portion 14 is provided inside thereof.
  • casing 12 is provided with the top
  • an introduction port 30 that opens toward the indoor space 201, which is an external space, and a suction port 32 that opens behind the introduction port 30 are formed.
  • the introduction port 30 opens toward the lower side where the cooking device 203 is located, and is formed in the bottom surface portion 26 of the first housing 12.
  • the hood portion 14 is provided with a collection space 34 for collecting contaminated air therein.
  • the hood portion 14 is formed with a plate-like extension portion 40 extending from the first inner wall portion 38 forming the introduction port 30 toward the suction port 32 side. Further, the hood portion 14 is formed with a cylindrical connection portion 44 that extends from the second inner wall portion 42 that forms the suction port 32 to the opposite side of the introduction port 30. A communication passage 46 is formed in the connection portion 44. The communication path 46 is formed so as to extend linearly along the central axis L1 of the suction port 32.
  • a back wall surface 36 is formed on the back side from the introduction port 30.
  • the rear wall surface 36 is formed in a bowl shape, that is, a concave shape, such that the inner diameter is smaller on the suction port 32 side than on the introduction port 30 side.
  • the rear wall surface 36 is provided such that a portion near the outer peripheral end away from the suction port 32 extends to the back side of the extending portion 40 that is a part of the hood portion 14.
  • the capturing member 16 is a filter and is arranged so as to cross the communication path 46.
  • the capturing member 16 is detachably attached to the hood portion 14.
  • the capturing member 16 can capture contaminants contained in the air flowing through the capturing member 16.
  • the contaminants here include dust and the like in addition to the oily smoke generated by cooking using the heating cooker 203.
  • the capturing member 16 is not limited to a filter as long as it can exhibit such a function.
  • the second casing 18 is disposed above the first casing 12, and a storage portion 48 is provided inside thereof.
  • a storage space 50 is formed inside the storage portion 48, and the blower 20 is installed in the storage space 50.
  • a connecting portion 44 of the hood portion 14 is connected to the storage portion 48, and the storage space 50 is communicated with the collection space 34 through the communication path 46.
  • An exhaust duct 52 is connected to the storage portion 48, and the storage space 50 communicates with an outdoor space (not shown) through an exhaust passage 54 in the exhaust duct 52.
  • the blower 20 is a centrifugal blower such as a sirocco fan, but the type is not limited to this.
  • the blower 20 is installed such that the suction port 56 for sucking air is positioned coaxially with the suction port 32 of the hood portion 14.
  • the blower 20 can drive the air in the collection space 34 through the suction port 32 and can discharge the sucked air to the exhaust path 54 by driving.
  • the cover member 22 is a current plate, and is disposed so as to cover the collection space 34 from the inlet 30 side.
  • FIG. 4 is an enlarged view of a part of FIG.
  • the extended portion 40 of the hood portion 14 is covered with the outer peripheral portion 22 a of the cover member 22 on the inner peripheral surface 40 a on the front side.
  • the cover member 22 is provided so that the lower surface 22b which is an exposed surface to the indoor space 201 is flush with the introduction port 30.
  • the cover member 22 is detachably attached to the hood portion 14 via a support (not shown) provided on the hood portion 14.
  • an intake portion 58 is formed by a through-hole penetrating in the thickness direction. Similarly to the cover member 22, the intake portion 58 is disposed on the inlet 30 side of the collection space 34.
  • a standing piece 60 that rises toward the suction port 32 is provided at the edge of the outer peripheral portion 22 a of the cover member 22.
  • a standing piece 62 that rises toward the suction port 32 is provided on the inner peripheral edge of the intake portion 58.
  • FIG. 5 is a bottom view of the exhaust device 10. This figure is also a view seen from the direction P1 (see FIG. 2) along the central axis L1 of the suction port 32. The central axis L1 also coincides with the central axis of the inlet 30.
  • P1 see FIG. 2
  • the central axis L1 also coincides with the central axis of the inlet 30.
  • the introduction port 30 is formed in a rectangular shape when viewed from the direction P1.
  • the cover member 22 is formed in a rectangular shape that matches the shape of the introduction port 30 when viewed from the direction P1, and is fitted into the inside thereof.
  • a plurality of air intake portions 58 are formed at positions near the outer periphery of the cover member 22 as long slots along the outer side 22 c of each of the four circumferences of the cover member 22.
  • the intake portions 58 are arranged in an annular shape along the circumferential direction around the suction port 32.
  • the hood portion 14 is provided with a blower port 64 on the back side from the introduction port 30.
  • the air outlet 64 opens into the collection space 34.
  • the air blowing port 64 is formed by the back wall surface 36 of the hood portion 14 and the edge portion 40b on the back side of the extending portion 40 on the side opposite to the introduction port 30.
  • the air supply path 70 for supplying airflow is connected to the air outlet 64.
  • a layered air flow is discharged from the air outlet 64 along the back wall surface 36 located on the back side from the intake portion 58.
  • the direction of the air flow flowing from the air supply passage 70 through the air blowing port 64 is indicated by an arrow, and a part of the range in which the layered air flow is discharged is indicated by a two-dot chain line S1.
  • the layered air flow is discharged from the blower port 64 toward the suction port 32.
  • the air blowing port 64 is formed by a plurality of side portions 66 and a plurality of corner portions 68.
  • Each side portion 66 is formed in a slit shape extending linearly along the outer side 33b of each of the four circumferences of the introduction port 30.
  • Each side portion 66 is arranged in an annular shape along the circumferential direction around the suction port 32.
  • the side portions 66 on both sides in the front-rear direction X are provided at locations where the suction port 32 is interposed, and the side portions 66 on both sides in the left-right direction X are also provided at locations where the suction port 32 is interposed.
  • Each corner portion 68 connects the ends of the adjacent side portions 66 and is formed in an arc shape.
  • the air blowing port 64 is provided by the side portions 66 and the corner portions 68 so as to be annularly connected along the circumferential direction around the suction port 32.
  • the intake part 58 is provided in the cover member 22 at a position close to the air blowing port 64 when viewed from the direction P1 and away from the air blowing port 64 toward the suction port 32.
  • the intake portion 58 is formed so as to extend along the longitudinal direction of the side portion 66 at a position close to the side portion 66 of the air blowing port 64.
  • the length in the longitudinal direction of the intake portion 58 is formed to be shorter than the length in the longitudinal direction of the side portion 66 at a position close to the intake portion 58.
  • air is discharged from the intake portion 58 vertically upward, which is a direction along the central axis L2. From the intake portion 58, air is discharged toward the path of the air flow discharged from the blower port 64.
  • FIG. 6 is a side sectional view showing the inner wall surface 36 of the hood portion 14.
  • the back wall surface 36 is provided so as to extend from the air blowing port 64 to the suction port 32.
  • the rear wall surface 36 is provided with a first flat surface portion 92, a curved surface portion 94, and a second flat surface portion 96 in order from the air blowing port 64 to the suction port 32.
  • the first flat portion 92 is formed to extend linearly from the upstream side to the downstream side of the air flow discharged from the blower port 64 so as to straddle the blower port 64.
  • the curved surface portion 94 is formed to have a curved shape having a curvature radius of 50 [mm] or more.
  • the radius of curvature here refers to the radius of curvature of a curve formed by the inner peripheral surface of the curved surface portion 94 in a cross section cut along the central axis L1 (see FIG. 2) of the suction port 32.
  • a tangent passing through the inner peripheral surface of the curved surface portion 94 is referred to as L3 (see FIG.
  • ⁇ an acute angle of the tangent L3 with respect to the central axis L1 of the suction port 32 is referred to as ⁇ (see FIG. 2).
  • ⁇ an acute angle of the tangent L3 with respect to the central axis L1 of the suction port 32
  • ⁇ an acute angle of the tangent L3 with respect to the central axis L1 of the suction port 32
  • the second flat portion 96 is formed to extend linearly from the air blowing port 64 side toward the suction port 32 side.
  • the back wall surface 36 is formed by a combination of the flat surface portions 92 and 96 and the curved surface portion 94.
  • the air supply path 70 is branched from the exhaust path 54, and the air blowing port 64 is communicated with the exhaust path 54 through the air supply path 70.
  • the air supply path 70 includes a downstream air supply path 70 ⁇ / b> A provided in the first housing 12 and an upstream air supply path 70 ⁇ / b> B connecting the downstream air supply path 70 ⁇ / b> A and the exhaust path 54.
  • the downstream air supply passage 70A communicates with the air inlet 72 and the air outlet 64 that open to the top surface portion 24 of the first housing 12, and is formed in a rectangular cylindrical shape as a whole.
  • the upstream air supply passage 70 ⁇ / b> B is formed in a plurality of air supply tubes 74 that connect the exhaust duct 52 and the supply inlet 72 of the first housing 12, and is provided in a plurality branched from the exhaust passage 54. 2 and 3, only the air supply tube 74 connected to the supply inlet 72 in one side portion of the four sides of the square cylindrical downstream air supply passage 70A is shown. A part of the other air supply tube 74 connected to the air supply inlet 72 in the side portion is omitted.
  • the air supply passage 70 is formed such that its passage cross-sectional area is smaller than the passage cross-sectional area S2 [mm 2 ] of the exhaust passage 54. Specifically, if the passage cross-sectional area of the downstream air supply passage 70A is S1a [mm 2 ] and the total value of the passage cross-sectional areas of each upstream air supply passage 70B is S1b [mm 2 ], S1a and S1b are These are formed so as to be smaller than the passage sectional area S2 of the exhaust passage 54. As a result, a larger amount of air can easily flow from the branching point of the exhaust path 54 and the air supply path 70 into the downstream flow path than in the air supply path 70.
  • the downstream side air supply path 70 ⁇ / b> A is provided with an inflow region 76, an airflow direction changing unit 78, an intermediate region 80, and an outflow region 84 in order from the supply port 72 to the blower port 64.
  • the airflow direction changing unit 78 the airflow collides with the abutting surface 78a in front of the airflow direction, and the airflow direction is changed.
  • an inclined surface 82 is provided in front of the airflow direction, and an air flow flows along the inclined surface 82.
  • the outflow region 84 is provided as a running section in which the airflow whose airflow direction has been changed by the airflow direction changing unit 78 is developed into a laminar flow state.
  • the air flowing through the air supply path 70 is decelerated when the airflow direction is changed by the airflow direction changing unit 78, the Reynolds number is reduced, and the air in the laminar flow state is easily discharged from the air blowing port 64.
  • FIG. 7 is a perspective sectional view of the range Q in FIG. 4 as viewed obliquely from above.
  • the downstream air supply passage 70 ⁇ / b> A is formed by a first opposing wall portion 86 and a second opposing wall portion 88 that are spaced apart from each other.
  • the 1st opposing wall part 86 and the 2nd opposing wall part 88 are connected by the some rib 90 as a connection member. Thereby, the site
  • Each rib 90 is provided in the inflow region 76 of the downstream air supply passage 70 ⁇ / b> A on the upstream side of the airflow direction changing unit 78, and is not provided in the intermediate region 80 and the outflow region 84 on the downstream side thereof.
  • the ribs 90 are provided in parallel along the airflow direction P2 of the airflow flowing through the inflow region 76.
  • the air in the exhaust passage 54 is supplied to the air blowing port 64 through the air supply passage 70 due to the pressure difference.
  • a part of the air discharged from the blower 20 is configured to be able to supply air to the blower port 64.
  • a layered air flow is discharged from the air outlet 64 along the back wall surface 36 of the hood portion 14.
  • the inside of the collection space 34 is maintained at a negative pressure, the contaminated air in the indoor space 201 is taken into the collection space 34 through the intake portion 58.
  • the air flow discharged from the blower port 64 functions as an air curtain, and the air flow suppresses the approach of the contaminated air taken in from the intake portion 58 to the back wall surface 36, so that the contaminants enter the back wall surface 36. Prevents adhesion.
  • Contaminants are trapped when the air containing them passes through the trapping member 16, and a purified air flow can be discharged from the blower port 64. Therefore, it is possible to prevent the contaminants from adhering to the inner wall surface 36 due to the air flow discharged from the blower port 64.
  • the airflow discharged from the blower port 64 prevents the contaminants from adhering to the back wall surface 36 of the hood portion 14 and suppresses the occurrence of dirt in the hood portion 14. It is done.
  • the flow rate of the air flow discharged from the blower port 64 is determined according to the pressure difference between the collection space 34 on the upstream side of the air supply path 70 and the exhaust path 54 which is the space on the downstream side, and the pressure It increases as the difference increases.
  • the collection space 34 is covered by the cover member 22, the collection space 34 is easily made negative by the blower 20, and the pressure difference is easily increased. Therefore, even if the output of the blower 20 is not increased, it is easy to discharge a large flow of air from the blower port 64, and it is easy to suppress the adhesion of contaminants to the back wall surface 36 of the hood portion 14.
  • the collection space 34 is covered by the cover member 22, the collection space 34 is not easily affected by the airflow or the like of the indoor space 201, and the airflow discharged from the air blowing port 64 is easily maintained in a laminar flow state. . Therefore, it becomes easy to suppress the approach of the air taken in from the intake part 58 to the back wall surface 36 in a wide range, and it becomes easy to suppress the adhesion of contaminants to the back wall surface 36 of the hood part 14.
  • each side portion 66 of the air blowing port 64 is provided so as to exhale air from different locations sandwiching the suction port 32 toward the suction port 32, so that the rear wall surface of the hood portion 14 is provided. It is easy to shorten the distance from the air blowing port 64 to the suction port 32 when the air flow is discharged to a wide range of 36. Therefore, it becomes easy to keep the air flow discharged from the blower port 64 in a laminar flow state, and it becomes easy to suppress adhesion of contaminants in a wide range of the back wall surface 36 of the hood portion 14.
  • the air blowing port 64 is provided so as to be continuous in a ring shape along the circumferential direction around the suction port 32, and can discharge an air flow to almost the entire area of the back wall surface 36 of the hood portion 14. Therefore, it becomes easy to suppress adhesion of contaminants over a wide range of the inner wall surface 36.
  • the rib 90 is provided on the downstream side of the air flow direction changing portion 78, the air flow in the air supply path 70 is divided by the rib 90, and the air flow in the divided state is easily discharged from the blower port 64. In this case, a dead space is generated between the diverted air flows, and contaminants easily approach the back wall surface 36 in the dead space.
  • the rib 90 is provided on the upstream side of the airflow direction changing unit 78 and is not provided on the downstream side. Therefore, even if the air flow in the air supply path 70 is divided by the rib 90, the air flow is diffused when the air flow direction changing unit 78 changes the air flow direction.
  • the air flow in a state of being diverted to the downstream side is less likely to flow, and the air flow in a state of being not diverted from the air blowing port 64 is easily discharged. For this reason, the air flow can be easily discharged from the blower port 64 to a wide range of the back wall surface 36 of the hood portion 14 while ensuring the strength of the portion including the opposing wall portions 86 and 88 by the rib 90.
  • each of the ribs 90 is provided along the airflow direction of the airflow flowing through the air supply path 70. Therefore, the airflow flowing through the air supply path 70 can be rectified by the ribs 90, the flow of the airflow entering the airflow direction changing unit 78 is stabilized, and the laminar airflow is easily discharged from the blower port 64.
  • the intake portion 58 is provided at a position close to the air blowing port 64 when viewed from the direction P1, the air flow discharged from the air blowing port 64 functions as an induced flow that exerts an ejector action. Therefore, the amount of air taken into the collection space 34 from the intake portion 58 increases, and it becomes easy to take in a lot of air from the intake portion 58 even if the output of the blower 20 is small.
  • the intake portion 58 is located away from the air blowing port 64 toward the suction port 32 when viewed from the direction P1. For this reason, when contaminated air is taken in from the intake part 58, it becomes difficult for the contaminated air to approach the vicinity of the air blowing port 64, and the range in which contaminants can come into contact is easily brought closer to the suction port 32 side. Therefore, even if contaminants adhere to the back wall surface 36 of the hood portion 14, the attachment range is close to the suction port 32 side, and the cleaning operation is facilitated by narrowing the range to be cleaned.
  • the air outlet 64 is located in a deep part in the hood part 14, it is difficult for the user to put in his hand and to clean it.
  • the contaminated air is difficult to approach in the vicinity of the air blowing port 64, it becomes easy to prevent the attachment of the contaminants at the places where the cleaning is difficult, and the workability at the time of cleaning is improved.
  • the layer thickness tends to be thin.
  • the layer thickness of the air flow discharged from the blower port 64 can be easily maintained. The thicker the airflow layer is, the easier it is to suppress the approach of the contaminated air taken in from the intake portion 58 to the back wall surface 36, and thus it is easy to suppress the adhesion of contaminants to the back wall surface 36.
  • the exhaust device 10 may be used for discharging contaminants such as fumes generated by welding work in factory equipment in addition to contaminants such as oily smoke generated by cooking using the heating cooker 203.
  • the exhaust device 10 may be used in a guest room of a restaurant other than a kitchen such as a kitchen.
  • FIG. 8 is a side sectional view of the exhaust device 10 according to the first modification.
  • hood part 14 which concerns on the above-mentioned embodiment demonstrated the example formed in bowl shape.
  • the rear wall surface 36 may be formed in a planar shape as shown in the figure. In this case, the rear wall surface 36 does not include the curved surface portion 94 and is formed only by the flat surface portion 92.
  • the back wall surface 36 may be formed only by the curved surface portion 94. That is, the inner wall surface 36 only needs to be formed by one or both of the flat surface portion 92 and the curved surface portion 94.
  • FIG. 9 is a side sectional view of the exhaust device 10 according to the second modification.
  • hood part 14 demonstrated the example comprised by the single member connected from the ventilation port 64 to the suction port 32 in the above-mentioned embodiment.
  • the rear wall surface 36 may be configured by a plurality of divided members 98 having a portion divided at a midway position from the air blowing port 64 to the suction port 32.
  • the boundary position of each division member 98 is shown with the dashed-dotted line L4.
  • the dividing member 98 includes a first dividing member 98A and a second dividing member 98B.
  • the first divided member 98 ⁇ / b> A includes a part of the back wall surface 36 and the connection portion 44.
  • Each divided member 98 is detachably connected by screws, fittings, or the like.
  • FIG. 10 is a bottom view of the exhaust device 10 according to the third modification.
  • the air blowing port 64 according to the above-described embodiment is formed by a plurality of side portions 66 and a plurality of corner portions 68. As shown in the drawing, the blower port 64 may not include the plurality of corner portions 68 but may be formed only by the plurality of side portions 66. In addition to this, the air blowing port 64 may be formed by only a single side portion 66, and the position, shape, and number thereof are not limited to those described above.
  • blower different from the blower 20 may be installed in the first housing 12 or the like, and the blower 64 may be supplied with air through the supply passage 70 by the blower.
  • the intake portion 58 may be formed by a gap provided between the introduction port 30 of the hood portion 14 and the edge portion of the outer peripheral portion 22a of the cover member 22.
  • the capturing member 16 has been described as being installed in the communication path 46 that connects the storage space 50 in which the blower 20 is installed and the collection space 34.
  • the capturing member 16 is only required to be installed in a flow path from at least the collection space 34 through the blower 20 to the blower port 64.
  • the capture member 16 is provided in the exhaust path 54, the air supply path 70, and the like. It may be installed or may be installed in the vicinity of the suction port 32 of the collection space 34.
  • the present invention relates to an exhaust device that sucks and discharges contaminants such as oil smoke.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ventilation (AREA)

Abstract

　This exhaust device comprises a hood (14) having an intake port (30) which opens towards the outside and a suction port further inside than the intake port (30), and provided with an internal collection space (34); a blower that can suck in air inside the collection space via the suction port; a cover member (22) which covers the collection space (34) from the intake port (30) side; and an intake (58) for drawing outside air into the collection space (34). The exhaust device is characterized in that the hood (14) is provided with a blower port (64) for discharging a laminar air flow along an inner wall surface (36) further inside than the intake (58). As a result of this configuration it is possible to provide an exhaust device which can minimize fouling inside the hood.

Description

排気装置Exhaust system
　本発明は、油煙等の汚染物を吸い込んで排出する排気装置に関する。 The present invention relates to an exhaust device that sucks and discharges contaminants such as oil smoke.
　加熱調理器を用いた調理では油煙が頻繁に生じる。これが室内空間に拡散すると汚れの原因となる。この対策として、通常、レンジフード等の排気装置が用いられる。一般的な排気装置は、フード部と、フード部内の空気を吸い込んで排出する排気ファンを備える。フード部には加熱調理器に向けて開口する導入口が形成される。排気ファンの駆動により、油煙等の汚染物を含む空気（以下、汚染空気という）が導入口からフード部内に吸い込まれ、その室内空間での拡散が抑えられる。 ・ Oil fume frequently occurs when cooking with a heating cooker. When this diffuses into the indoor space, it causes dirt. As a countermeasure, an exhaust device such as a range hood is usually used. A general exhaust device includes a hood portion and an exhaust fan that sucks and exhausts air in the hood portion. The hood portion is formed with an introduction port that opens toward the cooking device. By driving the exhaust fan, air containing contaminants such as oil smoke (hereinafter referred to as contaminated air) is sucked into the hood portion from the introduction port, and diffusion in the indoor space is suppressed.
　従来、室内空間の汚染空気をフード部内に取り込み易くするための工夫をした排気装置が知られている（特許文献１参照）。この排気装置では、排気ファンとは別のファンによりフード部内に誘導流を吹き出し、その誘導流により導入口の近傍の汚染空気をフード部内に誘導している。 Conventionally, there has been known an exhaust device that is devised to make it easy to take contaminated air in an indoor space into a hood (see Patent Document 1). In this exhaust device, an induced flow is blown into the hood portion by a fan different from the exhaust fan, and the contaminated air in the vicinity of the introduction port is guided into the hood portion by the induced flow.
特開２００５－９８６１８号公報Japanese Patent Laid-Open No. 2005-98618
　ところで、フード部内に吸い込まれた汚染物は、通常、フィルタ等の捕捉部材により捕捉される。しかし、その捕捉部材の設置箇所より上流側では汚染物によりフード部内に汚れが発生しかねず、従来の排気装置には改善の余地があった。 Incidentally, the contaminants sucked into the hood part are usually captured by a capturing member such as a filter. However, contamination may occur in the hood due to contaminants upstream from the place where the capture member is installed, and there is room for improvement in the conventional exhaust system.
　本発明は、このような課題に鑑みてなされ、その目的は、フード部内での汚れの発生を抑えられる排気装置を提供することにある。 This invention is made in view of such a subject, and the objective is to provide the exhaust apparatus which can suppress generation | occurrence | production of the dirt in a hood part.
　上記課題を解決するために、本発明のある態様の排気装置は、外部空間に向けて開口する導入口と、導入口より奥側にて開口する吸引口とが形成され、内部に捕集空間が設けられるフード部と、吸引口を通して捕集空間内の空気を吸い込み可能な送風機と、捕集空間を導入口側から覆うカバー部材と、外部空間の空気を捕集空間に取り込むための吸気部と、を備え、フード部には、吸気部より奥側にある奥壁面に沿って層状の空気流を吐き出すための送風口が設けられる。
　この態様によると、吸気部から汚染空気が捕集空間内に取り込まれたとき、送風口から吐き出される空気流がエアカーテンとして機能し、その空気流により、汚染空気の奥壁面への接近が抑えられる。よって、汚染空気に含まれる汚染物の奥壁面への付着を防げ、フード部内での汚れの発生を抑えられる。 In order to solve the above-described problems, an exhaust device according to an aspect of the present invention includes an inlet opening that opens toward an external space and a suction opening that opens at a depth side from the inlet, and the inside of the collection space A hood portion provided with a fan, a blower capable of sucking air in the collection space through the suction port, a cover member that covers the collection space from the introduction port side, and an air intake portion for taking air in the external space into the collection space The hood portion is provided with a blower port for discharging a layered air flow along a back wall surface on the back side from the intake portion.
According to this aspect, when the contaminated air is taken into the collection space from the intake portion, the air flow discharged from the air blowing port functions as an air curtain, and the air flow suppresses the approach of the contaminated air to the inner wall surface. It is done. Therefore, it is possible to prevent the contamination contained in the contaminated air from adhering to the inner wall surface, and to suppress the occurrence of dirt in the hood portion.
　排気装置は、送風機から排出される空気の一部を送風口に給気可能に構成されてもよい。
　この態様によると、送風口へ給気するための駆動系を送風機とは別に設置せずともよくなる。 The exhaust device may be configured so that a part of the air discharged from the blower can be supplied to the blower opening.
According to this aspect, it is not necessary to install a drive system for supplying air to the air outlet separately from the air blower.
　排気装置は、捕集空間から送風機を経由して送風口に至る流路中に設置され、空気に含まれる汚染物を捕捉可能な捕捉部材を更に備えてもよい。
　この態様によると、送風口から清浄化された空気流を吐き出すことができ、その空気流による奥壁面への汚染物の付着を防げる。 The exhaust device may be further provided with a capturing member that is installed in a flow path from the collection space to the air blowing port via the blower and capable of capturing contaminants contained in the air.
According to this aspect, the cleaned airflow can be discharged from the blower opening, and the contaminants can be prevented from adhering to the inner wall surface due to the airflow.
　送風口は、吸引口の周りの周方向に沿って環状に連なるように設けられてもよい。
　この態様によると、フード部の奥壁面の広い範囲で汚染物の付着を抑え易くなる。 The air blowing port may be provided so as to be annularly connected along the circumferential direction around the suction port.
According to this aspect, it becomes easy to suppress adhesion of contaminants in a wide range of the back wall surface of the hood portion.
　排気装置は、送風口に給気するための給気路を形成し、互いに間隔を空けて配置される第１対向壁部及び第２対向壁部と、第１対向壁部及び第２対向壁部を接続する接続部材と、を更に備え、給気路には、給気路を流れる空気流の気流方向を変更する気流方向変更部が設けられ、接続部材は、気流方向変更部より上流側に設けられ、該気流方向変更部より下流側には設けられなくともよい。
　この態様によると、給気路の空気流が接続部材により分断されても、気流方向変更部により気流方向を変更するときに空気流が拡散され、分流されていない状態の空気流を送風口から吐き出し易くなる。 The exhaust device forms an air supply path for supplying air to the air blowing port, and is arranged with a first opposed wall portion and a second opposed wall portion spaced apart from each other, and a first opposed wall portion and a second opposed wall. And a connecting member that connects the air flow direction changing unit for changing the air flow direction of the airflow flowing through the air supply path, and the connecting member is upstream of the airflow direction changing unit. Provided on the downstream side of the airflow direction changing portion.
According to this aspect, even when the air flow in the air supply path is divided by the connection member, the air flow is diffused when the air flow direction is changed by the air flow direction changing unit, and the air flow in a state where the air flow is not divided is It becomes easy to exhale.
　接続部材は、給気路を流れる空気流の気流方向に沿って複数設けられてもよい。
　この態様によると、複数の接続部材により給気路を流れる空気流を整流でき、気流方向変更部に入る空気流の流れが安定し、送風口から層流状態の空気流を吐き出し易くなる。 A plurality of connecting members may be provided along the airflow direction of the airflow flowing through the air supply path.
According to this aspect, the airflow flowing through the air supply path can be rectified by the plurality of connecting members, the flow of the airflow entering the airflow direction changing unit is stabilized, and the laminar airflow is easily discharged from the blower port.
　吸気部は、吸引口の中心軸に沿った方向から見たとき、送風口から吸引口側に離れた位置にてカバー部材に設けられてもよい。
　この態様によると、送風口の付近に汚染空気が接近し難くなるため、その付近のような奥まった清掃し難い箇所での汚染物の付着を防ぎ易くなり、清掃時の作業性が良好になる。 The air intake portion may be provided on the cover member at a position away from the air blowing port toward the suction port when viewed from the direction along the central axis of the suction port.
According to this aspect, since it becomes difficult for the contaminated air to approach the vicinity of the air blowing port, it becomes easy to prevent adhesion of contaminants in a deeply difficult-to-clean area such as the vicinity thereof, and the workability at the time of cleaning is improved. .
　奥壁面は、送風口から吸引口に連なるように延びて設けられ、送風口を跨ぐように直線状に延びる平面部が含まれてもよい。
　この態様によると、送風口から吐き出される空気流の層厚を維持し易くなるため、吸気部から取り込まれる汚染空気の奥壁面への接近を抑え易くなり、その奥壁面への汚染物の付着を抑え易くなる。 The back wall surface may be provided so as to extend from the air blowing port to the suction port, and may include a flat portion extending linearly so as to straddle the air blowing port.
According to this aspect, since it becomes easy to maintain the layer thickness of the air flow discharged from the air outlet, it becomes easy to suppress the approach of the contaminated air taken in from the intake portion to the back wall surface, and the adhesion of contaminants to the back wall surface is prevented. It becomes easy to suppress.
　本発明によれば、フード部内での汚れの発生を抑えられる。 According to the present invention, the occurrence of dirt in the hood portion can be suppressed.
実施形態に係る排気装置の使用状態を示す側面図である。It is a side view which shows the use condition of the exhaust apparatus which concerns on embodiment. 実施形態に係る排気装置の側面断面図である。It is side surface sectional drawing of the exhaust apparatus which concerns on embodiment. 実施形態に係る排気装置の正面断面図である。It is front sectional drawing of the exhaust apparatus which concerns on embodiment. 図２の一部を拡大した側面断面図である。It is side surface sectional drawing to which a part of FIG. 2 was expanded. 実施形態に係る排気装置の底面図である。It is a bottom view of the exhaust apparatus which concerns on embodiment. 実施形態に係るフード部の奥壁面を示す側面断面図である。It is side surface sectional drawing which shows the back wall surface of the hood part which concerns on embodiment. 図４の範囲Ｑを斜め上側から見た斜視断面図である。It is the perspective sectional view which looked at range Q of Drawing 4 from the slanting upper part. 第１変形例に係る排気装置の側面断面図である。It is side surface sectional drawing of the exhaust apparatus which concerns on a 1st modification. 第２変形例に係る排気装置の側面断面図である。It is side surface sectional drawing of the exhaust apparatus which concerns on a 2nd modification. 第３変形例に係る排気装置の底面図である。It is a bottom view of the exhaust apparatus which concerns on a 3rd modification.
　以下の実施形態や各変形例では、同一の構成要素には同一の符号を付し、重複する説明を省略する。また、各図面では実施形態の説明を容易にするために部材の一部を適宜省略する。 In the following embodiments and modifications, the same components are denoted by the same reference numerals, and redundant description is omitted. Moreover, in each drawing, a part of member is abbreviate | omitted suitably in order to make description of embodiment easy.
　図１は実施形態に係る排気装置１０の使用状態を示す側面図である。排気装置１０はレンジフードであり、室内空間２０１に設置される。室内空間２０１には、この他に、電磁調理器等の加熱調理器２０３が設置される。 FIG. 1 is a side view showing a use state of the exhaust device 10 according to the embodiment. The exhaust device 10 is a range hood and is installed in the indoor space 201. In addition to this, a heating cooker 203 such as an electromagnetic cooker is installed in the indoor space 201.
　図２、図３は、それぞれ排気装置１０の側面断面図、正面断面図である。図２では図１のＹ方向から見たＸＺ面断面図を示し、図３では図１のＸ方向から見たＹＺ面断面図を示す。以下、方向Ｘ、Ｙをそれぞれ前後方向Ｘ、左右方向Ｙといい、これらと直交する鉛直方向を上下方向Ｚという。なお、ＸＹ面は水平面である。 2 and 3 are a side sectional view and a front sectional view of the exhaust device 10, respectively. 2 shows an XZ plane sectional view as seen from the Y direction in FIG. 1, and FIG. 3 shows a YZ plane sectional view as seen from the X direction in FIG. Hereinafter, the directions X and Y are referred to as the front-rear direction X and the left-right direction Y, respectively, and the vertical direction perpendicular thereto is referred to as the up-down direction Z. The XY plane is a horizontal plane.
　排気装置１０は、第１筐体１２と、フード部１４と、捕捉部材１６と、第２筐体１８と、送風機２０と、カバー部材２２を備える。図２、図３に示す構成は大半が共通するので、図２を主に参照しながら説明する。 The exhaust device 10 includes a first housing 12, a hood portion 14, a capturing member 16, a second housing 18, a blower 20, and a cover member 22. Since most of the configurations shown in FIGS. 2 and 3 are common, description will be made with reference mainly to FIG.
　第１筐体１２は、扁平な箱状に形成され、その内側にフード部１４が設けられる。第１筐体１２は、天面部２４と、底面部２６と、これらの四周の外周部を接続する側面部２８とを備える。 The first housing 12 is formed in a flat box shape, and a hood portion 14 is provided inside thereof. The 1st housing | casing 12 is provided with the top | upper surface part 24, the bottom face part 26, and the side part 28 which connects the outer peripheral part of these 4 rounds.
　フード部１４には、外部空間である室内空間２０１に向けて開口する導入口３０と、導入口３０より奥側にて開口する吸引口３２とが形成される。導入口３０は、加熱調理器２０３のある下方に向けて開口し、第１筐体１２の底面部２６に形成される。フード部１４には、その内部に汚染空気を捕集するための捕集空間３４が設けられる。 In the hood part 14, an introduction port 30 that opens toward the indoor space 201, which is an external space, and a suction port 32 that opens behind the introduction port 30 are formed. The introduction port 30 opens toward the lower side where the cooking device 203 is located, and is formed in the bottom surface portion 26 of the first housing 12. The hood portion 14 is provided with a collection space 34 for collecting contaminated air therein.
　フード部１４には、導入口３０を形成する第１内壁部３８から吸引口３２側に向けて延びる板状の延出部４０が形成される。また、フード部１４には、吸引口３２を形成する第２内壁部４２から導入口３０と反対側に延びる筒状の接続部４４が形成される。接続部４４内には連通路４６が形成される。連通路４６は、吸引口３２の中心軸Ｌ１に沿って直線状に延びるように形成される。 The hood portion 14 is formed with a plate-like extension portion 40 extending from the first inner wall portion 38 forming the introduction port 30 toward the suction port 32 side. Further, the hood portion 14 is formed with a cylindrical connection portion 44 that extends from the second inner wall portion 42 that forms the suction port 32 to the opposite side of the introduction port 30. A communication passage 46 is formed in the connection portion 44. The communication path 46 is formed so as to extend linearly along the central axis L1 of the suction port 32.
　フード部１４は、導入口３０より奥側に奥壁面３６が形成される。奥壁面３６は、導入口３０側より吸引口３２側の方が内径が小さくなるような椀状、つまり、凹状に形成される。奥壁面３６は、吸引口３２から離れた外周端寄りの箇所が、フード部１４の一部である延出部４０の裏側まで延びるように設けられる。 In the hood portion 14, a back wall surface 36 is formed on the back side from the introduction port 30. The rear wall surface 36 is formed in a bowl shape, that is, a concave shape, such that the inner diameter is smaller on the suction port 32 side than on the introduction port 30 side. The rear wall surface 36 is provided such that a portion near the outer peripheral end away from the suction port 32 extends to the back side of the extending portion 40 that is a part of the hood portion 14.
　捕捉部材１６はフィルタであり、連通路４６内を横断するように配置される。捕捉部材１６は、フード部１４に脱着可能に取り付けられる。捕捉部材１６は、その内部を流れる空気に含まれる汚染物を捕捉可能である。ここでの汚染物には、加熱調理器２０３を用いた調理により生じる油煙の他に、埃等が含まれる。捕捉部材１６は、そのような機能を発揮できる形態であればフィルタに限られない。 The capturing member 16 is a filter and is arranged so as to cross the communication path 46. The capturing member 16 is detachably attached to the hood portion 14. The capturing member 16 can capture contaminants contained in the air flowing through the capturing member 16. The contaminants here include dust and the like in addition to the oily smoke generated by cooking using the heating cooker 203. The capturing member 16 is not limited to a filter as long as it can exhibit such a function.
　第２筐体１８は、第１筐体１２の上方に配設され、その内側に収納部４８が設けられる。収納部４８の内側には収納空間５０が形成され、収納空間５０には送風機２０が設置される。収納部４８にはフード部１４の接続部４４が接続され、収納空間５０は連通路４６を通して捕集空間３４と連通される。収納部４８には排気ダクト５２が接続され、収納空間５０は排気ダクト５２内の排気路５４を通して室外空間（図示せず）と連通される。 The second casing 18 is disposed above the first casing 12, and a storage portion 48 is provided inside thereof. A storage space 50 is formed inside the storage portion 48, and the blower 20 is installed in the storage space 50. A connecting portion 44 of the hood portion 14 is connected to the storage portion 48, and the storage space 50 is communicated with the collection space 34 through the communication path 46. An exhaust duct 52 is connected to the storage portion 48, and the storage space 50 communicates with an outdoor space (not shown) through an exhaust passage 54 in the exhaust duct 52.
　送風機２０は、シロッコファン等の遠心送風機であるが、その種類はこれに限られない。送風機２０は、空気を吸い込むための吸込口５６がフード部１４の吸引口３２と同軸上に位置するように設置される。送風機２０は、その駆動により、吸引口３２を通して捕集空間３４内の空気を吸い込み可能であるとともに、吸い込んだ空気を排気路５４に排出可能である。 The blower 20 is a centrifugal blower such as a sirocco fan, but the type is not limited to this. The blower 20 is installed such that the suction port 56 for sucking air is positioned coaxially with the suction port 32 of the hood portion 14. The blower 20 can drive the air in the collection space 34 through the suction port 32 and can discharge the sucked air to the exhaust path 54 by driving.
　カバー部材２２は、整流板であり、捕集空間３４を導入口３０側から覆うように配置される。図４は図２の一部を拡大した図である。フード部１４の延出部４０は、その表側である内周面４０ａがカバー部材２２の外周部２２ａにより覆われる。カバー部材２２は、導入口３０に対して、その室内空間２０１への露出面である下面２２ｂが面一となるように設けられる。カバー部材２２はフード部１４に設けられる支持具（図示せず）を介してフード部１４に脱着可能に取り付けられる。 The cover member 22 is a current plate, and is disposed so as to cover the collection space 34 from the inlet 30 side. FIG. 4 is an enlarged view of a part of FIG. The extended portion 40 of the hood portion 14 is covered with the outer peripheral portion 22 a of the cover member 22 on the inner peripheral surface 40 a on the front side. The cover member 22 is provided so that the lower surface 22b which is an exposed surface to the indoor space 201 is flush with the introduction port 30. The cover member 22 is detachably attached to the hood portion 14 via a support (not shown) provided on the hood portion 14.
　カバー部材２２には、その厚さ方向に貫通する貫通孔により吸気部５８が形成される。吸気部５８は、カバー部材２２と同様に、捕集空間３４の導入口３０側に配置される。カバー部材２２の外周部２２ａの端縁部には、吸引口３２側に立ち上がる起立片６０が設けられる。吸気部５８の内周縁部には、吸引口３２側に立ち上がる立設片６２が設けられる。 In the cover member 22, an intake portion 58 is formed by a through-hole penetrating in the thickness direction. Similarly to the cover member 22, the intake portion 58 is disposed on the inlet 30 side of the collection space 34. A standing piece 60 that rises toward the suction port 32 is provided at the edge of the outer peripheral portion 22 a of the cover member 22. A standing piece 62 that rises toward the suction port 32 is provided on the inner peripheral edge of the intake portion 58.
　図５は排気装置１０の底面図である。本図は、吸引口３２の中心軸Ｌ１に沿った方向Ｐ１（図２参照）から見た図でもある。この中心軸Ｌ１は、導入口３０の中心軸とも一致する。以下、この方向Ｐ１から見たときの各部位の位置関係をいうときは図５を参照しながら説明する。 FIG. 5 is a bottom view of the exhaust device 10. This figure is also a view seen from the direction P1 (see FIG. 2) along the central axis L1 of the suction port 32. The central axis L1 also coincides with the central axis of the inlet 30. Hereinafter, when referring to the positional relationship of each part when viewed from this direction P1, it will be described with reference to FIG.
　導入口３０は、方向Ｐ１から見たとき、矩形状に形成される。カバー部材２２は、方向Ｐ１から見たとき、導入口３０の形状に合致するような矩形状に形成され、その内側に嵌め入れられる。吸気部５８は、カバー部材２２の四周それぞれの外側辺２２ｃに沿って長い長孔として、カバー部材２２の外周寄りの位置に複数形成される。各吸気部５８は、吸引口３２の周りの周方向に沿って環状に配列される。 The introduction port 30 is formed in a rectangular shape when viewed from the direction P1. The cover member 22 is formed in a rectangular shape that matches the shape of the introduction port 30 when viewed from the direction P1, and is fitted into the inside thereof. A plurality of air intake portions 58 are formed at positions near the outer periphery of the cover member 22 as long slots along the outer side 22 c of each of the four circumferences of the cover member 22. The intake portions 58 are arranged in an annular shape along the circumferential direction around the suction port 32.
　ここで、フード部１４には、図４に示すように、導入口３０より奥側に送風口６４が設けられる。送風口６４は捕集空間３４に開口する。送風口６４は、フード部１４の奥壁面３６と、導入口３０とは反対側にある延出部４０の裏側の縁部４０ｂとにより形成される。 Here, as shown in FIG. 4, the hood portion 14 is provided with a blower port 64 on the back side from the introduction port 30. The air outlet 64 opens into the collection space 34. The air blowing port 64 is formed by the back wall surface 36 of the hood portion 14 and the edge portion 40b on the back side of the extending portion 40 on the side opposite to the introduction port 30.
　送風口６４には、空気流を給気するための給気路７０が接続される。給気路７０から給気されると、送風口６４からは、吸気部５８より奥側にある奥壁面３６に沿って、層状の空気流が吐き出される。本図では給気路７０から送風口６４を通して流れる空気流の方向を矢印で示し、層状の空気流が吐き出される範囲の一部を二点鎖線Ｓ１で示す。層状の空気流は送風口６４から吸引口３２に近づく方向に向けて吐き出される。 The air supply path 70 for supplying airflow is connected to the air outlet 64. When air is supplied from the air supply path 70, a layered air flow is discharged from the air outlet 64 along the back wall surface 36 located on the back side from the intake portion 58. In this figure, the direction of the air flow flowing from the air supply passage 70 through the air blowing port 64 is indicated by an arrow, and a part of the range in which the layered air flow is discharged is indicated by a two-dot chain line S1. The layered air flow is discharged from the blower port 64 toward the suction port 32.
　図５では送風口６４の開口する位置を破線で示す。送風口６４は、複数の側辺部分６６と複数の角部分６８により形成される。各側辺部分６６は導入口３０の四周それぞれの外側辺３３ｂに沿って直線状に延びるスリット状に形成される。各側辺部分６６は、吸引口３２の周りの周方向に沿って環状に配列される。前後方向Ｘ両側の側辺部分６６は、吸引口３２を間に挟んだ箇所に設けられ、左右方向Ｘ両側の側辺部分６６も、吸引口３２を間に挟んだ箇所に設けられる。各角部分６８は隣接する側辺部分６６の端部同士を接続し、円弧状に形成される。送風口６４は、各側辺部分６６と角部分６８により、吸引口３２の周りの周方向に沿って環状に連なるように設けられる。 In FIG. 5, the opening position of the air blowing port 64 is indicated by a broken line. The air blowing port 64 is formed by a plurality of side portions 66 and a plurality of corner portions 68. Each side portion 66 is formed in a slit shape extending linearly along the outer side 33b of each of the four circumferences of the introduction port 30. Each side portion 66 is arranged in an annular shape along the circumferential direction around the suction port 32. The side portions 66 on both sides in the front-rear direction X are provided at locations where the suction port 32 is interposed, and the side portions 66 on both sides in the left-right direction X are also provided at locations where the suction port 32 is interposed. Each corner portion 68 connects the ends of the adjacent side portions 66 and is formed in an arc shape. The air blowing port 64 is provided by the side portions 66 and the corner portions 68 so as to be annularly connected along the circumferential direction around the suction port 32.
　給気路７０から送風口６４に給気されると、各側辺部分６６からは、その長手方向の全長に亘る範囲から吸引口３２に近づく同方向に向けて層状の空気流が吐き出される。各角部分６８からも、吸引口３２に近づく方向に向けて層状の空気流が吐き出される。 When air is supplied from the air supply path 70 to the air blowing port 64, a laminar air flow is discharged from each side portion 66 toward the same direction approaching the suction port 32 from a range extending over the entire length in the longitudinal direction. A layered air flow is also discharged from each corner portion 68 in a direction approaching the suction port 32.
　吸気部５８は、方向Ｐ１から見たとき、送風口６４に近接した位置であって、送風口６４から吸引口３２側に離れた位置にてカバー部材２２に設けられる。また、吸気部５８は、送風口６４の側辺部分６６に近接した位置において、その側辺部分６６の長手方向に沿って延びるように形成される。吸気部５８の長手方向長さは、その吸気部５８に近接した位置にある側辺部分６６の長手方向長さより短くなるように形成される。吸気部５８からは、図４に示すように、その中心軸Ｌ２に沿った方向である鉛直上方に空気が吐き出される。吸気部５８からは、送風口６４から吐き出される空気流の経路に向けて空気が吐き出されることになる。 The intake part 58 is provided in the cover member 22 at a position close to the air blowing port 64 when viewed from the direction P1 and away from the air blowing port 64 toward the suction port 32. In addition, the intake portion 58 is formed so as to extend along the longitudinal direction of the side portion 66 at a position close to the side portion 66 of the air blowing port 64. The length in the longitudinal direction of the intake portion 58 is formed to be shorter than the length in the longitudinal direction of the side portion 66 at a position close to the intake portion 58. As shown in FIG. 4, air is discharged from the intake portion 58 vertically upward, which is a direction along the central axis L2. From the intake portion 58, air is discharged toward the path of the air flow discharged from the blower port 64.
　図６はフード部１４の奥壁面３６を示す側面断面図である。奥壁面３６は、送風口６４から吸引口３２に連なるように延びて設けられる。奥壁面３６は、送風口６４から吸引口３２にかけて、第１平面部９２と、曲面部９４と、第２平面部９６とが順に設けられる。 FIG. 6 is a side sectional view showing the inner wall surface 36 of the hood portion 14. The back wall surface 36 is provided so as to extend from the air blowing port 64 to the suction port 32. The rear wall surface 36 is provided with a first flat surface portion 92, a curved surface portion 94, and a second flat surface portion 96 in order from the air blowing port 64 to the suction port 32.
　第１平面部９２は、送風口６４から吐き出される空気流の上流側から下流側に向けて、送風口６４を跨ぐように直線状に延びて形成される。曲面部９４は、曲率半径５０［ｍｍ］以上の曲線状を呈するように形成される。ここでの曲率半径とは、吸引口３２の中心軸Ｌ１（図２参照）に沿って切断した断面において、曲面部９４の内周面がなす曲線の曲率半径をいう。曲面部９４の内周面を通る接線をＬ３（図２参照）といい、吸引口３２の中心軸Ｌ１に対する接線Ｌ３の鋭角での角度をθ（図２参照）というと、曲面部９４は、送風口６４側から吸引口３２側に向かうにつれて、その角度θが大きくなるように湾曲して形成される。第２平面部９６は、送風口６４側から吸引口３２側に向けて直線状に延びて形成される。このように、奥壁面３６は、各平面部９２、９６と曲面部９４の組み合わせにより形成される。 The first flat portion 92 is formed to extend linearly from the upstream side to the downstream side of the air flow discharged from the blower port 64 so as to straddle the blower port 64. The curved surface portion 94 is formed to have a curved shape having a curvature radius of 50 [mm] or more. The radius of curvature here refers to the radius of curvature of a curve formed by the inner peripheral surface of the curved surface portion 94 in a cross section cut along the central axis L1 (see FIG. 2) of the suction port 32. A tangent passing through the inner peripheral surface of the curved surface portion 94 is referred to as L3 (see FIG. 2), and an acute angle of the tangent L3 with respect to the central axis L1 of the suction port 32 is referred to as θ (see FIG. 2). As it goes from the air blowing port 64 side to the suction port 32 side, it is curved and formed so that the angle θ increases. The second flat portion 96 is formed to extend linearly from the air blowing port 64 side toward the suction port 32 side. Thus, the back wall surface 36 is formed by a combination of the flat surface portions 92 and 96 and the curved surface portion 94.
　給気路７０は、図２に示すように、排気路５４から分岐して設けられ、送風口６４は給気路７０を通して排気路５４に連通される。給気路７０には、第１筐体１２内に設けられる下流側給気路７０Ａと、下流側給気路７０Ａと排気路５４を接続する上流側給気路７０Ｂが含まれる。 As shown in FIG. 2, the air supply path 70 is branched from the exhaust path 54, and the air blowing port 64 is communicated with the exhaust path 54 through the air supply path 70. The air supply path 70 includes a downstream air supply path 70 </ b> A provided in the first housing 12 and an upstream air supply path 70 </ b> B connecting the downstream air supply path 70 </ b> A and the exhaust path 54.
　下流側給気路７０Ａは、第１筐体１２の天面部２４に開口する給入口７２と送風口６４を連通し、全体として角形筒状に形成される。上流側給気路７０Ｂは、排気ダクト５２と第１筐体１２の給入口７２を接続する複数の給気チューブ７４内に形成され、排気路５４から分岐して複数設けられる。図２、図３では、角形筒状の下流側給気路７０Ａの四周の側辺部分のうち、一つの側辺部分にある給入口７２に接続される給気チューブ７４のみ全体を示し、他の側辺部分にある給入口７２に接続される他の給気チューブ７４は一部を省略する。 The downstream air supply passage 70A communicates with the air inlet 72 and the air outlet 64 that open to the top surface portion 24 of the first housing 12, and is formed in a rectangular cylindrical shape as a whole. The upstream air supply passage 70 </ b> B is formed in a plurality of air supply tubes 74 that connect the exhaust duct 52 and the supply inlet 72 of the first housing 12, and is provided in a plurality branched from the exhaust passage 54. 2 and 3, only the air supply tube 74 connected to the supply inlet 72 in one side portion of the four sides of the square cylindrical downstream air supply passage 70A is shown. A part of the other air supply tube 74 connected to the air supply inlet 72 in the side portion is omitted.
　給気路７０は、その通路断面積が、排気路５４の通路断面積Ｓ２［ｍｍ２］より小さくなるように形成される。詳細には、下流側給気路７０Ａの通路断面積をＳ１ａ［ｍｍ２］とし、各上流側給気路７０Ｂの通路断面積の合計値をＳ１ｂ［ｍｍ２］とすると、それらＳ１ａ、Ｓ１ｂは、何れも排気路５４の通路断面積Ｓ２より小さくなるように形成される。これにより、排気路５４と給気路７０の分岐箇所から下流側の流路内に給気路７０内より多量の空気を流し易くなる。 The air supply passage 70 is formed such that its passage cross-sectional area is smaller than the passage cross-sectional area S2 [mm 2 ] of the exhaust passage 54. Specifically, if the passage cross-sectional area of the downstream air supply passage 70A is S1a [mm 2 ] and the total value of the passage cross-sectional areas of each upstream air supply passage 70B is S1b [mm 2 ], S1a and S1b are These are formed so as to be smaller than the passage sectional area S2 of the exhaust passage 54. As a result, a larger amount of air can easily flow from the branching point of the exhaust path 54 and the air supply path 70 into the downstream flow path than in the air supply path 70.
　下流側給気路７０Ａは、図４に示すように、給入口７２から送風口６４にかけて順に、流入領域７６と、気流方向変更部７８と、中間領域８０と、流出領域８４とが設けられる。気流方向変更部７８では、その気流方向前方にある突き当たり面７８ａに空気流が衝突して、その気流方向が変更される。中間領域８０では、その気流方向前方に傾斜面８２が設けられ、その傾斜面８２に沿って空気流が流れる。流出領域８４は、気流方向変更部７８で気流方向を変更した空気流を層流状態に発達させる助走区間として設けられる。給気路７０を流れる空気は、気流方向変更部７８により気流方向を変更するときに減速されてレイノルズ数が小さくなり、送風口６４から層流状態の空気を吐き出し易くなる。 As shown in FIG. 4, the downstream side air supply path 70 </ b> A is provided with an inflow region 76, an airflow direction changing unit 78, an intermediate region 80, and an outflow region 84 in order from the supply port 72 to the blower port 64. In the airflow direction changing unit 78, the airflow collides with the abutting surface 78a in front of the airflow direction, and the airflow direction is changed. In the intermediate region 80, an inclined surface 82 is provided in front of the airflow direction, and an air flow flows along the inclined surface 82. The outflow region 84 is provided as a running section in which the airflow whose airflow direction has been changed by the airflow direction changing unit 78 is developed into a laminar flow state. The air flowing through the air supply path 70 is decelerated when the airflow direction is changed by the airflow direction changing unit 78, the Reynolds number is reduced, and the air in the laminar flow state is easily discharged from the air blowing port 64.
　図７は図４の範囲Ｑを斜め上側から見た斜視断面図である。下流側給気路７０Ａは、互いに間隔を空けて配置される第１対向壁部８６と第２対向壁部８８により形成される。第１対向壁部８６と第２対向壁部８８は接続部材としての複数のリブ９０により接続される。これにより各対向壁部８６、８８を含む部位が補強される。各リブ９０は、気流方向変更部７８より上流側にある下流側給気路７０Ａの流入領域７６に設けられ、それより下流側の中間領域８０、流出領域８４には設けられない。各リブ９０は、流入領域７６を流れる空気流の気流方向Ｐ２に沿って並列に設けられる。 FIG. 7 is a perspective sectional view of the range Q in FIG. 4 as viewed obliquely from above. The downstream air supply passage 70 </ b> A is formed by a first opposing wall portion 86 and a second opposing wall portion 88 that are spaced apart from each other. The 1st opposing wall part 86 and the 2nd opposing wall part 88 are connected by the some rib 90 as a connection member. Thereby, the site | part containing each opposing wall part 86 and 88 is reinforced. Each rib 90 is provided in the inflow region 76 of the downstream air supply passage 70 </ b> A on the upstream side of the airflow direction changing unit 78, and is not provided in the intermediate region 80 and the outflow region 84 on the downstream side thereof. The ribs 90 are provided in parallel along the airflow direction P2 of the airflow flowing through the inflow region 76.
　以上の実施形態に係る排気装置１０の動作を説明する。図２を参照する。送風機２０が駆動すると、フード部１４の捕集空間３４内の空気が吸引口３２を通して吸い込まれ、捕集空間３４内が負圧に保持される。捕集空間３４内の空気は送風機２０から排気路５４を通して室外空間に排出され、排気路５４内が正圧に保持される。 The operation of the exhaust device 10 according to the above embodiment will be described. Please refer to FIG. When the blower 20 is driven, air in the collection space 34 of the hood portion 14 is sucked through the suction port 32, and the inside of the collection space 34 is maintained at a negative pressure. The air in the collection space 34 is discharged from the blower 20 through the exhaust path 54 to the outdoor space, and the inside of the exhaust path 54 is maintained at a positive pressure.
　このとき、排気路５４内の圧力と捕集空間３４内の圧力との間で圧力差が生じるため、その圧力差により、送風口６４には排気路５４内の空気が給気路７０を通して給気される。つまり、送風機２０から排出される空気の一部が送風口６４に給気可能に構成される。給気路７０に給気されると、送風口６４からはフード部１４の奥壁面３６に沿って層状の空気流が吐き出される。 At this time, since a pressure difference is generated between the pressure in the exhaust passage 54 and the pressure in the collection space 34, the air in the exhaust passage 54 is supplied to the air blowing port 64 through the air supply passage 70 due to the pressure difference. I care. That is, a part of the air discharged from the blower 20 is configured to be able to supply air to the blower port 64. When air is supplied to the air supply path 70, a layered air flow is discharged from the air outlet 64 along the back wall surface 36 of the hood portion 14.
　また、捕集空間３４内が負圧に保持されるため、吸気部５８を通して室内空間２０１の汚染空気が捕集空間３４内に取り込まれる。このとき、送風口６４から吐き出される空気流がエアカーテンとして機能し、その空気流により、吸気部５８から取り込まれる汚染空気の奥壁面３６への接近が抑えられ、汚染物の奥壁面３６への付着を防げる。 Further, since the inside of the collection space 34 is maintained at a negative pressure, the contaminated air in the indoor space 201 is taken into the collection space 34 through the intake portion 58. At this time, the air flow discharged from the blower port 64 functions as an air curtain, and the air flow suppresses the approach of the contaminated air taken in from the intake portion 58 to the back wall surface 36, so that the contaminants enter the back wall surface 36. Prevents adhesion.
　汚染物は、これを含む空気が捕捉部材１６を通過したときに捕捉され、送風口６４から清浄化された空気流を吐き出すことができる。よって、送風口６４から吐き出される空気流による奥壁面３６への汚染物の付着を防げる。 Contaminants are trapped when the air containing them passes through the trapping member 16, and a purified air flow can be discharged from the blower port 64. Therefore, it is possible to prevent the contaminants from adhering to the inner wall surface 36 due to the air flow discharged from the blower port 64.
　以上の実施形態に係る排気装置１０によれば、送風口６４から吐き出される空気流により、フード部１４の奥壁面３６への汚染物の付着を防げ、フード部１４内での汚れの発生を抑えられる。 According to the exhaust device 10 according to the above embodiment, the airflow discharged from the blower port 64 prevents the contaminants from adhering to the back wall surface 36 of the hood portion 14 and suppresses the occurrence of dirt in the hood portion 14. It is done.
　また、送風口６４から吐き出される空気流の流量は、給気路７０の上流側にある捕集空間３４と、下流側にある空間である排気路５４との圧力差に応じて決まり、その圧力差が増大するほど増加する。この点、本実施形態では、カバー部材２２により捕集空間３４が覆われるため、送風機２０により捕集空間３４を負圧にし易くなり、その圧力差を増大させ易くなる。よって、送風機２０の出力を増大させなくとも、送風口６４から大流量の空気流を吐き出し易くなり、フード部１４の奥壁面３６への汚染物の付着を抑え易くなる。 The flow rate of the air flow discharged from the blower port 64 is determined according to the pressure difference between the collection space 34 on the upstream side of the air supply path 70 and the exhaust path 54 which is the space on the downstream side, and the pressure It increases as the difference increases. In this regard, in the present embodiment, since the collection space 34 is covered by the cover member 22, the collection space 34 is easily made negative by the blower 20, and the pressure difference is easily increased. Therefore, even if the output of the blower 20 is not increased, it is easy to discharge a large flow of air from the blower port 64, and it is easy to suppress the adhesion of contaminants to the back wall surface 36 of the hood portion 14.
　また、捕集空間３４がカバー部材２２により覆われるため、室内空間２０１の空気流等の影響を捕集空間３４が受け難くなり、送風口６４から吐き出される空気流を層流状態に保ち易くなる。よって、吸気部５８から取り込まれる空気の奥壁面３６への接近を広い範囲で抑え易くなり、フード部１４の奥壁面３６への汚染物の付着を抑え易くなる。 In addition, since the collection space 34 is covered by the cover member 22, the collection space 34 is not easily affected by the airflow or the like of the indoor space 201, and the airflow discharged from the air blowing port 64 is easily maintained in a laminar flow state. . Therefore, it becomes easy to suppress the approach of the air taken in from the intake part 58 to the back wall surface 36 in a wide range, and it becomes easy to suppress the adhesion of contaminants to the back wall surface 36 of the hood part 14.
　また、送風機２０から排出される空気の一部が送風口６４に給気可能に構成されるため、送風口６４に給気するための駆動系を送風機２０とは別に設置せずともよくなり、その駆動系の設置に要するコストやスペースを抑えられる。 In addition, since a part of the air discharged from the blower 20 is configured to be able to supply air to the air outlet 64, it is not necessary to install a drive system for supplying air to the air outlet 64 separately from the air fan 20, Costs and space required for installing the drive system can be reduced.
　また、フード部１４の奥壁面３６の広い範囲に層状の空気流を吐き出すうえで、単一の箇所から吐き出すとなると、送風口６４から吸引口３２までの距離が長くなり易く、その空気流を層流状態に保ち難くなる。この点、本実施形態では、吸引口３２を間に挟んだ異なる箇所から吸引口３２に向けて空気を吐き出すように送風口６４の各側辺部分６６が設けられるため、フード部１４の奥壁面３６の広い範囲に空気流を吐き出すうえで、送風口６４から吸引口３２までの距離を短くし易くなる。よって、送風口６４から吐き出される空気流を層流状態に保ち易くなり、フード部１４の奥壁面３６の広い範囲で汚染物の付着を抑え易くなる。 Further, when the layered air flow is discharged over a wide range of the back wall surface 36 of the hood portion 14, if the air is discharged from a single location, the distance from the air blowing port 64 to the suction port 32 tends to be long, and the air flow is reduced. It becomes difficult to maintain a laminar flow state. In this respect, in the present embodiment, each side portion 66 of the air blowing port 64 is provided so as to exhale air from different locations sandwiching the suction port 32 toward the suction port 32, so that the rear wall surface of the hood portion 14 is provided. It is easy to shorten the distance from the air blowing port 64 to the suction port 32 when the air flow is discharged to a wide range of 36. Therefore, it becomes easy to keep the air flow discharged from the blower port 64 in a laminar flow state, and it becomes easy to suppress adhesion of contaminants in a wide range of the back wall surface 36 of the hood portion 14.
　また、送風口６４は、吸引口３２の周りの周方向に沿って環状に連なるように設けられ、フード部１４の奥壁面３６のほぼ全域に空気流を吐き出せる。よって、その奥壁面３６の広い範囲で汚染物の付着を抑え易くなる。 Further, the air blowing port 64 is provided so as to be continuous in a ring shape along the circumferential direction around the suction port 32, and can discharge an air flow to almost the entire area of the back wall surface 36 of the hood portion 14. Therefore, it becomes easy to suppress adhesion of contaminants over a wide range of the inner wall surface 36.
　また、リブ９０が気流方向変更部７８より下流側に設けられると、給気路７０の空気流がリブ９０により分断され、分流した状態の空気流が送風口６４から吐き出され易くなる。この場合、分流した空気流の間にデッドスペースが生じてしまい、そのデッドスペースでは奥壁面３６へ汚染物が接近し易くなる。この点、本実施形態では、リブ９０が気流方向変更部７８より上流側に設けられ、下流側に設けられていない。よって、給気路７０の空気流がリブ９０により分断されても、気流方向変更部７８により気流方向を変更するときに空気流が拡散される。この結果、それより下流側に分流した状態の空気流が流れ難くなり、送風口６４からは分流していない状態の空気流を吐き出し易くなる。このため、各対向壁部８６、８８を含む部位の強度をリブ９０により確保しつつ、フード部１４の奥壁面３６の広い範囲に送風口６４から空気流を吐き出し易くなる。 Further, when the rib 90 is provided on the downstream side of the air flow direction changing portion 78, the air flow in the air supply path 70 is divided by the rib 90, and the air flow in the divided state is easily discharged from the blower port 64. In this case, a dead space is generated between the diverted air flows, and contaminants easily approach the back wall surface 36 in the dead space. In this regard, in the present embodiment, the rib 90 is provided on the upstream side of the airflow direction changing unit 78 and is not provided on the downstream side. Therefore, even if the air flow in the air supply path 70 is divided by the rib 90, the air flow is diffused when the air flow direction changing unit 78 changes the air flow direction. As a result, the air flow in a state of being diverted to the downstream side is less likely to flow, and the air flow in a state of being not diverted from the air blowing port 64 is easily discharged. For this reason, the air flow can be easily discharged from the blower port 64 to a wide range of the back wall surface 36 of the hood portion 14 while ensuring the strength of the portion including the opposing wall portions 86 and 88 by the rib 90.
　また、各リブ９０のそれぞれは、給気路７０を流れる空気流の気流方向に沿って設けられる。よって、給気路７０を流れる空気流を各リブ９０により整流でき、気流方向変更部７８に入る空気流の流れが安定し、送風口６４から層流状態の空気流を吐き出し易くなる。 Further, each of the ribs 90 is provided along the airflow direction of the airflow flowing through the air supply path 70. Therefore, the airflow flowing through the air supply path 70 can be rectified by the ribs 90, the flow of the airflow entering the airflow direction changing unit 78 is stabilized, and the laminar airflow is easily discharged from the blower port 64.
　また、吸気部５８は、方向Ｐ１から見たとき、送風口６４に近接した位置に設けられるため、送風口６４から吐き出される空気流がエゼクタ作用を発揮する誘導流として機能する。よって、吸気部５８から捕集空間３４に取り込まれる空気量が増え、送風機２０の出力が小さくとも吸気部５８から多くの空気を取り込み易くなる。 In addition, since the intake portion 58 is provided at a position close to the air blowing port 64 when viewed from the direction P1, the air flow discharged from the air blowing port 64 functions as an induced flow that exerts an ejector action. Therefore, the amount of air taken into the collection space 34 from the intake portion 58 increases, and it becomes easy to take in a lot of air from the intake portion 58 even if the output of the blower 20 is small.
　また、吸気部５８は、方向Ｐ１から見たとき、送風口６４から吸引口３２側に離れた位置にある。このため、吸気部５８から汚染空気を取り込んだとき、送風口６４の付近に汚染空気が接近し難くなり、汚染物が接触し得る範囲を吸引口３２側に近づけ易くなる。よって、かりにフード部１４の奥壁面３６に汚染物が付着しても、その付着範囲が吸引口３２側に近くなり、清掃すべき範囲が狭まることで清掃作業が容易となる。 Further, the intake portion 58 is located away from the air blowing port 64 toward the suction port 32 when viewed from the direction P1. For this reason, when contaminated air is taken in from the intake part 58, it becomes difficult for the contaminated air to approach the vicinity of the air blowing port 64, and the range in which contaminants can come into contact is easily brought closer to the suction port 32 side. Therefore, even if contaminants adhere to the back wall surface 36 of the hood portion 14, the attachment range is close to the suction port 32 side, and the cleaning operation is facilitated by narrowing the range to be cleaned.
　また、送風口６４は、フード部１４内の奥まった箇所にあるため、その付近はユーザが手を入れ難く清掃し難い。この点、本実施形態では、送風口６４の付近に汚染空気が接近し難くなるため、その清掃し難い箇所での汚染物の付着を防ぎ易くなり、清掃時の作業性が良好になる。 In addition, since the air outlet 64 is located in a deep part in the hood part 14, it is difficult for the user to put in his hand and to clean it. In this respect, in the present embodiment, since the contaminated air is difficult to approach in the vicinity of the air blowing port 64, it becomes easy to prevent the attachment of the contaminants at the places where the cleaning is difficult, and the workability at the time of cleaning is improved.
　また、フード部１４の奥壁面３６に対して送風口６４を跨ぐ位置に曲面部９４が設けられると、送風口６４から空気流が吐き出されるとき、空気流の一部が曲面部９４に接触して層厚が薄くなり易くなる。この点、本実施形態では奥壁面３６の送風口６４を跨ぐ位置に第１平面部９２が設けられるため、送風口６４から吐き出される空気流の層厚を維持し易くなる。この空気流の層厚が厚い方が、吸気部５８から取り込まれる汚染空気の奥壁面３６への接近を抑え易くなるので、その奥壁面３６への汚染物の付着を抑え易くなる。 Further, when the curved surface portion 94 is provided at a position straddling the air blowing port 64 with respect to the back wall surface 36 of the hood portion 14, when an air flow is discharged from the air blowing port 64, a part of the air flow comes into contact with the curved surface portion 94. Therefore, the layer thickness tends to be thin. In this respect, in the present embodiment, since the first flat portion 92 is provided at a position across the blower port 64 of the back wall surface 36, the layer thickness of the air flow discharged from the blower port 64 can be easily maintained. The thicker the airflow layer is, the easier it is to suppress the approach of the contaminated air taken in from the intake portion 58 to the back wall surface 36, and thus it is easy to suppress the adhesion of contaminants to the back wall surface 36.
　以上、実施の形態に基づき本発明を説明したが、実施の形態は、本発明の原理、応用を示すにすぎない。また、実施の形態には、請求の範囲に規定された本発明の思想を逸脱しない範囲において、多くの変形例や配置の変更が可能である。 Although the present invention has been described based on the embodiments, the embodiments only show the principle and application of the present invention. In the embodiment, many modifications and arrangements can be made without departing from the spirit of the present invention defined in the claims.
　排気装置１０は、加熱調理器２０３を用いた調理により生じる油煙等の汚染物の他に、工場用設備での溶接作業により生じるヒューム等の汚染物の排出に用いてもよい。排気装置１０は、キッチン等の調理室の他に、飲食店の客室等で用いられてもよい。 The exhaust device 10 may be used for discharging contaminants such as fumes generated by welding work in factory equipment in addition to contaminants such as oily smoke generated by cooking using the heating cooker 203. The exhaust device 10 may be used in a guest room of a restaurant other than a kitchen such as a kitchen.
　図８は第１変形例に係る排気装置１０の側面断面図を示す。上述の実施形態に係るフード部１４の奥壁面３６は椀状に形成される例を説明した。奥壁面３６は、本図のように、平面状に形成されてもよい。この場合、奥壁面３６は曲面部９４を含まず、平面部９２のみにより形成されることになる。なお、奥壁面３６は、曲面部９４のみにより形成されてもよい。つまり、奥壁面３６は、平面部９２と曲面部９４の一方又は両方により形成されていればよい。 FIG. 8 is a side sectional view of the exhaust device 10 according to the first modification. The back wall surface 36 of the food | hood part 14 which concerns on the above-mentioned embodiment demonstrated the example formed in bowl shape. The rear wall surface 36 may be formed in a planar shape as shown in the figure. In this case, the rear wall surface 36 does not include the curved surface portion 94 and is formed only by the flat surface portion 92. The back wall surface 36 may be formed only by the curved surface portion 94. That is, the inner wall surface 36 only needs to be formed by one or both of the flat surface portion 92 and the curved surface portion 94.
　図９は第２変形例に係る排気装置１０の側面断面図を示す。上述の実施形態にフード部１４の奥壁面３６は、送風口６４から吸引口３２にかけて連なる単一の部材により構成される例を説明した。奥壁面３６は、送風口６４から吸引口３２にかけての途中位置で分割した形状の部分を有する複数の分割部材９８により構成されてもよい。本図では、各分割部材９８の境界位置を一点鎖線Ｌ４で示す。分割部材９８は、第１分割部材９８Ａと第２分割部材９８Ｂを含む。第１分割部材９８Ａは、奥壁面３６の一部と、接続部４４を含んで構成される。第２分割部材９８Ａは、奥壁面３６の他の部位と、接続部４４が下側から差し込まれる挿入孔１００とを含んで構成される。各分割部材９８はねじ、嵌め合い等により脱着可能に連結される。 FIG. 9 is a side sectional view of the exhaust device 10 according to the second modification. The back wall surface 36 of the food | hood part 14 demonstrated the example comprised by the single member connected from the ventilation port 64 to the suction port 32 in the above-mentioned embodiment. The rear wall surface 36 may be configured by a plurality of divided members 98 having a portion divided at a midway position from the air blowing port 64 to the suction port 32. In this figure, the boundary position of each division member 98 is shown with the dashed-dotted line L4. The dividing member 98 includes a first dividing member 98A and a second dividing member 98B. The first divided member 98 </ b> A includes a part of the back wall surface 36 and the connection portion 44. 98 A of 2nd division members are comprised including the other site | part of the back wall surface 36, and the insertion hole 100 in which the connection part 44 is inserted from the lower side. Each divided member 98 is detachably connected by screws, fittings, or the like.
　図１０は第３変形例に係る排気装置１０の底面図を示す。上述の実施形態に係る送風口６４は、複数の側辺部分６６と複数の角部分６８により形成された。送風口６４は、本図に示すように、複数の角部分６８を含まず、複数の側辺部分６６のみにより形成されてもよい。また、この他にも、送風口６４は単数の側辺部分６６のみにより形成されてもよく、その位置、形状、数は上述したものに限られない。 FIG. 10 is a bottom view of the exhaust device 10 according to the third modification. The air blowing port 64 according to the above-described embodiment is formed by a plurality of side portions 66 and a plurality of corner portions 68. As shown in the drawing, the blower port 64 may not include the plurality of corner portions 68 but may be formed only by the plurality of side portions 66. In addition to this, the air blowing port 64 may be formed by only a single side portion 66, and the position, shape, and number thereof are not limited to those described above.
　また、送風口６４には、排気路５４と捕集空間３４の圧力差により、排気路５４の空気を給気路７０を通して給気される例を説明した。この他に、送風機２０とは別の送風機を第１筐体１２等に設置し、その送風機により給気路７０を通して送風口６４に給気されるようにしてもよい。 Further, the example in which the air in the exhaust passage 54 is supplied to the air outlet 64 through the air supply passage 70 due to the pressure difference between the exhaust passage 54 and the collection space 34 has been described. In addition, a blower different from the blower 20 may be installed in the first housing 12 or the like, and the blower 64 may be supplied with air through the supply passage 70 by the blower.
　また、吸気部５８は、カバー部材２２に形成される貫通孔により形成される例を説明した。吸気部５８は、フード部１４の導入口３０とカバー部材２２の外周部２２ａの端縁部との間に設けられる隙間により形成されてもよい。 Further, the example in which the intake portion 58 is formed by a through hole formed in the cover member 22 has been described. The intake portion 58 may be formed by a gap provided between the introduction port 30 of the hood portion 14 and the edge portion of the outer peripheral portion 22a of the cover member 22.
　捕捉部材１６は、送風機２０が設置される収納空間５０と捕集空間３４を連通する連通路４６に設置される例を説明した。捕捉部材１６は、少なくとも捕集空間３４から送風機２０を経由して送風口６４に至る流路中に設置されていればよく、連通路４６の他に、排気路５４、給気路７０等に設置されていてもよいし、捕集空間３４の吸引口３２の近傍に設置されてもよい。 The capturing member 16 has been described as being installed in the communication path 46 that connects the storage space 50 in which the blower 20 is installed and the collection space 34. The capturing member 16 is only required to be installed in a flow path from at least the collection space 34 through the blower 20 to the blower port 64. In addition to the communication path 46, the capture member 16 is provided in the exhaust path 54, the air supply path 70, and the like. It may be installed or may be installed in the vicinity of the suction port 32 of the collection space 34.
１０…排気装置、１４…フード部、２０…送風機、２２…カバー部材、３０…導入口、３２…吸引口、３４…捕集空間、３６…奥壁面、５４…排気路、５８…吸気部、６４…送風口、７０…給気路、７８…気流方向変更部、８６…第１対向壁部、８８…第２対向壁部、９０…リブ（接続部材）、９２…平面部。 DESCRIPTION OF SYMBOLS 10 ... Exhaust device, 14 ... Hood part, 20 ... Air blower, 22 ... Cover member, 30 ... Inlet port, 32 ... Suction port, 34 ... Collection space, 36 ... Back wall surface, 54 ... Exhaust passage, 58 ... Intake part, 64 ... Air outlet, 70 ... Air supply path, 78 ... Airflow direction change part, 86 ... 1st opposing wall part, 88 ... 2nd opposing wall part, 90 ... Rib (connection member), 92 ... Plane part.
　本発明は、油煙等の汚染物を吸い込んで排出する排気装置に関する。 The present invention relates to an exhaust device that sucks and discharges contaminants such as oil smoke.

Claims (8)

  1. 　外部空間に向けて開口する導入口と、前記導入口より奥側にて開口する吸引口とが形成され、内部に捕集空間が設けられるフード部と、
    　前記吸引口を通して前記捕集空間内の空気を吸い込み可能な送風機と、
    　前記捕集空間を前記導入口側から覆うカバー部材と、
    　前記外部空間の空気を前記捕集空間に取り込むための吸気部と、を備え、
    　前記フード部には、前記吸気部より奥側にある奥壁面に沿って層状の空気流を吐き出すための送風口が設けられることを特徴とする排気装置。     A hood part in which an introduction port that opens toward an external space and a suction port that opens on the back side from the introduction port are formed, and a collection space is provided inside,
    A blower capable of sucking air in the collection space through the suction port;
    A cover member that covers the collection space from the inlet side;
    An intake portion for taking air in the external space into the collection space,
    The exhaust device according to claim 1, wherein the hood portion is provided with an air outlet for discharging a layered air flow along a back wall surface on the back side from the intake portion.
  2. 　前記送風機から排出される空気の一部を前記送風口に給気可能に構成されることを特徴とする請求項１に記載の排気装置。 The exhaust apparatus according to claim 1, wherein a part of the air discharged from the blower is configured to be supplied to the blower opening.
  3. 　前記捕集空間から前記送風機を経由して前記送風口に至る流路中に設置され、空気に含まれる汚染物を捕捉可能な捕捉部材を更に備えることを特徴とする請求項２に記載の排気装置。 The exhaust according to claim 2, further comprising a capturing member that is installed in a flow path from the collection space to the blower opening via the blower and capable of trapping contaminants contained in the air. apparatus.
  4. 　前記送風口は、前記吸引口の周りの周方向に沿って環状に連なるように設けられることを特徴とする請求項１から３のいずれかに記載の排気装置。 The exhaust device according to any one of claims 1 to 3, wherein the air blowing port is provided so as to be annularly connected along a circumferential direction around the suction port.
  5. 　前記送風口に給気するための給気路を形成し、互いに間隔を空けて配置される第１対向壁部及び第２対向壁部と、
    　前記第１対向壁部及び前記第２対向壁部を接続する接続部材と、を更に備え、
    　前記給気路には、該給気路を流れる空気流の気流方向を変更する気流方向変更部が設けられ、
    　前記接続部材は、前記気流方向変更部より上流側に設けられ、該気流方向変更部より下流側には設けられないことを特徴とする請求項１から４のいずれかに記載の排気装置。     Forming an air supply path for supplying air to the air blowing port, and a first opposing wall portion and a second opposing wall portion that are spaced apart from each other;
    A connection member connecting the first opposing wall and the second opposing wall,
    The air supply path is provided with an airflow direction changing unit that changes the airflow direction of the airflow flowing through the air supply path,
    The exhaust device according to any one of claims 1 to 4, wherein the connection member is provided on the upstream side of the airflow direction changing unit and is not provided on the downstream side of the airflow direction changing unit.
  6. 　前記接続部材は、前記給気路を流れる空気流の気流方向に沿って複数設けられることを特徴とする請求項５に記載の排気装置。 The exhaust device according to claim 5, wherein a plurality of the connection members are provided along a direction of airflow of the airflow flowing through the air supply path.
  7. 　前記吸気部は、前記吸引口の中心軸に沿った方向から見たとき、前記送風口から該吸引口側に離れた位置にて前記カバー部材に設けられることを特徴とする請求項１から６のいずれかに記載の排気装置。 The said intake part is provided in the said cover member in the position which left | separated the said suction port side from the said ventilation port when it sees from the direction along the central axis of the said suction port. The exhaust device according to any one of the above.
  8. 　前記奥壁面は、前記送風口から前記吸引口に連なるように延びて設けられ、前記送風口を跨ぐように直線状に延びる平面部が含まれることを特徴とする請求項１から７のいずれかに記載の排気装置。 The said back wall surface is extended and provided so that it may continue from the said ventilation opening to the said suction opening, The flat part extended linearly so that the said ventilation opening may be straddled is included, The any one of Claim 1 to 7 characterized by the above-mentioned. The exhaust device according to 1.
PCT/JP2015/062829 2014-04-30 2015-04-28 Exhaust device WO2015166947A1 (en)

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JP2014094025A JP2015210066A (en) 2014-04-30 2014-04-30 Exhaust system
JP2014-094025 2014-04-30

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018137956A1 (en) * 2017-01-26 2018-08-02 BSH Hausgeräte GmbH Extractor hood

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102160415B1 (en) * 2020-01-17 2020-10-05 (주)리베첸 Exhaust hood system

Citations (5)

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Publication number Priority date Publication date Assignee Title
JPS61282743A (en) * 1985-06-05 1986-12-12 Teruo Takeuchi Exhaust hood difficult to be stained
JPH06193932A (en) * 1992-12-21 1994-07-15 Matsushita Electric Ind Co Ltd Exhaust hood apparatus
JPH0979638A (en) * 1995-09-08 1997-03-28 Marukatsu Sangyo Kk Range hood
JPH0989331A (en) * 1995-09-28 1997-04-04 Tokyo Gas Co Ltd Exhaust hood
JP2012207876A (en) * 2011-03-30 2012-10-25 Toho Gas Co Ltd Shallow type range hood

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61282743A (en) * 1985-06-05 1986-12-12 Teruo Takeuchi Exhaust hood difficult to be stained
JPH06193932A (en) * 1992-12-21 1994-07-15 Matsushita Electric Ind Co Ltd Exhaust hood apparatus
JPH0979638A (en) * 1995-09-08 1997-03-28 Marukatsu Sangyo Kk Range hood
JPH0989331A (en) * 1995-09-28 1997-04-04 Tokyo Gas Co Ltd Exhaust hood
JP2012207876A (en) * 2011-03-30 2012-10-25 Toho Gas Co Ltd Shallow type range hood

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018137956A1 (en) * 2017-01-26 2018-08-02 BSH Hausgeräte GmbH Extractor hood
CN110199157A (en) * 2017-01-26 2019-09-03 Bsh家用电器有限公司 Smoke exhaust ventilator

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