JP2009300026A - Exhaust system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an exhaust system capable of promptly discharging gas in an exhaust target space to the outside. <P>SOLUTION: The exhaust system arranged above a heating device is provided with a suction port which opposes to the heating device and to which a suction flow is made to flow in, a first discharge port arranged on the horizontal outer side of at least one portion of the suction port and discharging a first discharge flow, and a second discharge port provided between the suction port and the first discharge port and discharging a second discharge flow. The first discharge flow forms a cutoff flow for shutting off movement of the gas between the exhaust target space and an external space, and the second discharge flow forms a guide flow for guiding the gas in the vicinity of the heating device to the direction of the suction port. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  Aspects of the present invention generally relate to an exhaust device, and more particularly, to an exhaust device capable of forming an air curtain.

  There is an exhaust device that sucks and collects odors and exhausts them to the outside. For example, an exhaust device is installed above a cooking utensil such as a range installed in a kitchen, and oil smoke or odor rising from the cooking utensil is sucked and collected. On the other hand, recently, not only conventional kitchens in which cooking utensils are installed along walls, but also so-called island kitchens and peninsula kitchens in which cooking utensils are installed away from walls have begun to spread.

  In a conventional kitchen, even if the distance between the exhaust device and the cooking utensil is increased to 800 mm or more based on the regulations of the Fire Service Law, oil smoke and odor are difficult to diffuse because of the wall, so that oil smoke and odor are It was relatively easy to collect. However, in the island type kitchen and the peninsula type kitchen, the surroundings are open, so that oily smoke and odors are easily diffused, and it is difficult to collect oily smoke and odors. For this reason, an island type kitchen or a peninsula type kitchen requires an exhaust device having a higher collection performance than before. Also, even in a conventional kitchen, when there is a turbulent wind (cross wind) or the like, oil smoke or odor is likely to diffuse, and it may be difficult to collect oil smoke or odor.

  On the other hand, there is a device that collects and exhausts the oily smoke and odor while blocking the diffusion of oily smoke and odor rising from the cooking utensil etc. by the air curtain formed by the gas flow blown out from the exhaust device It has been proposed (for example, Patent Document 1, Patent Document 2, and Patent Document 3).

  Moreover, it is the range hood arrange | positioned above a heating cooker, Comprising: The suction port arrange | positioned facing a heating cooker, and attracting | sucking air, It extends in the circumferential direction around at least one part of the said suction port. A discharge port through which air forming the air curtain heading toward the heating cooker is discharged, reaching the vicinity of the heating cooker so as to block the air curtain, and suctioning according to the amount of air sucked from the suction port There has been proposed a range hood characterized by having discharge state control means for controlling the air that forms the air curtain so as not to be affected by airflow (Patent Document 4).

Here, it is required to further suppress leakage of contaminated air to the outside.
Japanese Patent Laid-Open No. 11-337072 Japanese Patent Laid-Open No. 2007-100780 JP 2005-214584 A JP 2008-70049 A

  An aspect of the present invention has been made based on recognition of such a problem, and provides an exhaust device that can quickly exhaust the gas in the exhaust target space to the outside.

  According to one aspect of the present invention, there is provided an exhaust device installed above a heating device, the suction device facing the heating device, into which a suction flow flows, and at least a part of the suction port in a horizontal outer side. A first discharge port that discharges a first discharge flow, a second discharge port that is provided between the suction port and the first discharge port and discharges a second discharge flow, The first discharge flow forms a cutoff flow that blocks the movement of gas between the exhaust target space and the external space, and the second discharge flow causes the gas in the vicinity of the heating device to pass through the gas. An exhaust device is provided that forms an induced flow that is directed toward the suction port.

  According to the aspect of the present invention, there is provided an exhaust device capable of quickly exhausting the gas in the exhaust target space to the outside.

1st invention is the exhaust apparatus installed above a heating apparatus, Comprising: The suction opening which faces the said heating apparatus, and a suction flow flows in, and is provided in the horizontal direction outside of at least one part of the above-mentioned suction opening, A first discharge port that discharges a first discharge flow; and a second discharge port that is provided between the suction port and the first discharge port and discharges a second discharge flow. The first discharge flow forms a cut-off flow that blocks the movement of gas between the exhaust target space and the external space, and the second discharge flow allows gas in the vicinity of the heating device to pass through the suction port. An exhaust device that forms an induced flow that is directed in a direction.
According to this exhaust device, the influence of a disturbance flow (air flow such as air conditioning existing in the external space) is blocked by the cut-off flow, and oil smoke or the like is promptly guided toward the suction port by the induced flow. Thereby, oil smoke etc. are exhausted favorably.

According to a second aspect of the present invention, in the first aspect of the invention, the first discharge flow is discharged from the first discharge port obliquely downward and in a direction not interfering with the second discharge flow. It is an exhaust device described in the above.
According to this exhaust device, since the cutoff flow and the induction flow do not interfere with each other, an appropriate flow rate, flow velocity, and direction are ensured in each of the cutoff flow and the induction flow.

According to a third aspect of the present invention, in the first or second aspect of the invention, the second discharge flow reaches an upper surface position of the heating device.
According to this exhaust device, the second discharge flow is located in a region near the heating device in the low pressure region (region having a relatively low atmospheric pressure) generated by the suction force of the exhaust device at the height of the heating device. Due to the influence, it is drawn toward the heating device. As a result, the second discharge flow can be well guided to the gas in the exhaust target space in the direction of the suction port in combination with the rising air flow resulting from the heating of the heating device.

According to a fourth aspect of the present invention, there is provided the exhaust apparatus according to any one of the first to third aspects, wherein the second discharge port is provided on the outer side in the horizontal direction than the heating device. .
According to this exhaust device, the second discharge flow can reach the low pressure region around the horizontal direction of the heating device. Accordingly, the mechanism described above with respect to the first aspect of the invention enables the second discharge flow to form an induced flow that favorably guides the gas in the exhaust target space toward the suction port.

The fifth invention is characterized in that, in any one of the first to fourth inventions, the first discharge flow exceeds the second discharge flow in at least one of a flow rate and a flow velocity. It is an exhaust device.
According to this exhaust device, the air flow is adjusted so that an appropriate suction air flow is formed in the exhaust target space by the second discharge flow while forming a strong air curtain that blocks disturbance by the first discharge flow. be able to.

Embodiments of the present invention will be described below with reference to the drawings. In addition, in each drawing, the same code | symbol is attached | subjected to the same component and detailed description is abbreviate | omitted suitably.
FIG. 1 is a schematic side view illustrating a kitchen in which an exhaust device according to an embodiment of the invention is installed.
FIG. 2 is a bottom view of the exhaust device according to this example.
FIG. 3 is a schematic view of the exhaust device according to this example as viewed obliquely from above.
FIG. 4 is a schematic view of the exhaust device according to this specific example viewed obliquely from below.

  The exhaust device 10a according to the present embodiment is installed above a heating device such as a heating cooker. The exhaust device 10 a includes a casing 12, an exhaust fan 34, and a discharge fan 36. The casing 12 includes a substantially rectangular casing lower portion 12a, a casing intermediate portion 12b extending so as to narrow upward from the casing lower portion 12a, and a casing upper portion 12c disposed above the casing intermediate portion 12b. Yes. The discharge fan 36 is provided in the casing 12 from the casing lower portion 12 a to the casing middle portion 12 b and discharges air toward the lower side of the casing 12. As the discharge fan 36, for example, a cross flow fan can be used. The exhaust fan 34 is provided inside the casing upper portion 12c, and sucks air below the casing 12 and discharges it to the outside.

  Although the casing 12 includes the casing intermediate portion 12b, the present invention is not limited to this, and the casing 12 may not include the casing intermediate portion 12b as described later with reference to FIG. In this case, the casing lower part 12a and the casing upper part 12c are connected. The discharge fan 36 is provided inside the casing lower part 12a.

  The casing 12 is provided with a suction port 20, a suction channel 22, an exhaust port 24, an intake port 26, a discharge channel 28, a cutoff flow discharge port 30 a, and an induction flow discharge port 30 b. Yes. The suction port 20 is provided at the lower end portion of the casing lower portion 12a so as to face the heating device, and allows a rising gas (suction flow) to flow in. The suction flow path 22 is provided inside the casing lower part 12 a and the casing upper part 12 c and guides the gas sucked from the suction port 20 to the exhaust fan 34. The exhaust port 24 is provided above the exhaust fan 34. The gas discharged from the exhaust fan 34 passes through the exhaust port 24 and is exhausted to the outside.

  On the other hand, the intake port 26 is provided above the discharge fan 36. The air above the casing middle portion 12 b passes through the intake port 26 and is taken into the discharge fan 36. This air is blown out in the direction of the discharge flow path 28 as indicated by the arrow A by the discharge fan 36. The discharge channel 28 is provided separately from the suction channel 22.

  The air blown out from the discharge fan 36 passes through the discharge flow path 28 and then branches to pass through the cutoff flow discharge flow path 28a and the induced flow discharge flow path 28b. Thereafter, the air passing through the cutoff flow discharge channel 28a is discharged from the cutoff flow discharge port 30a (first discharge port) as shown by an arrow B. In addition, the air that has passed through the induced flow discharge channel 28b is discharged from the induced flow discharge port 30b (second discharge port) as indicated by an arrow C.

  The cutoff flow discharge port 30a is provided on the outer side in the horizontal direction of at least a part of the suction port 20, and discharges the first discharge flow. Here, “the outside in the horizontal direction” means a side far from the center of the suction port 20 on a horizontal plane with the center of the suction port 20 as a reference. On the contrary, the side near the center of the suction port 20 on the horizontal plane with the center of the suction port 20 as a reference is referred to as “horizontal inner side”. The same applies to the following. As will be described in detail later, the first discharge flow forms a blocking flow that blocks the movement of gas between the exhaust target space and the external space. That is, it plays the role of an air curtain that blocks disturbance flow (air flow such as air conditioning existing in the external space). The cut-off flow outlet 30a may be provided on the lower surface of the casing lower portion 12a as shown in FIG. 1, or may be provided on the outer peripheral surface 12d of the casing lower portion 12a, or a slope 12e described later with reference to FIG.

  The induction flow discharge port 30b is provided between the suction port 20 and the cutoff flow discharge port 30a, and discharges the second discharge flow. As described in detail later, the second discharge flow discharges an induction flow that guides the gas in the vicinity of the heating device in the direction of the suction port 20. The induced flow discharge port 30b may be provided on the lower surface of the casing lower portion 12a as shown in FIG. 1, or may be provided on the outer peripheral surface 12d of the casing lower portion 12a, or a slope 12e described later with reference to FIG.

  As shown in FIG. 2, the exhaust device 10 a according to the present embodiment includes discharge fans 36 on the left and right sides and the back side (rear side) of the casing 12 where the cook stands. A total of three are provided one by one. Further, a total of three cutoff flow outlets 30a are provided on the lower surface of the casing lower portion 12a, in the region in contact with the left and right lateral sides and the rear outer peripheral surface 12d or in the vicinity thereof. In addition, a total of three induction flow discharge ports 30b are provided inside the horizontal flow discharge port 30a, one by one. The cutoff flow outlet 30a and the induction flow outlet 30b have a substantially rectangular shape. Each air curtain discharge port 30a and induction flow discharge port 30b correspond to each discharge fan 36 provided on the same side.

  In addition, it is preferable that the discharge fan 36, the cutoff flow discharge port 30a, and the induction flow discharge port 30b are not provided on the front side. This is because when the gas (discharge flow) discharged from the discharge port 30 directly hits an operator or a cook, the person may be uncomfortable. However, the discharge fan 36, the cut-off flow discharge port 30a, and the induced flow discharge port 30b may be provided on the front side according to the work purpose and work form.

Further, the configuration shown in FIG. 5 or 6 may be used. 5 and 6 are schematic bottom views illustrating other configurations of the cutoff flow discharge port 30a and the induced flow discharge port 30b.
As shown in FIG. 5, walls are provided on either the left or right side, and the discharge fan 36, the cut-off flow discharge port 30a, and the induction flow discharge port 30b are provided one by one on the other side and the rear. It may be configured to be provided individually. Or although not shown in figure, it is set as the structure by which a wall is provided in the right and left either side and back, and the discharge fan 36, the cutoff flow discharge port 30a, and the one induction flow discharge port 30b are provided in the other side. Good. Alternatively, the discharge fan 36, the cut-off flow discharge port 30a, and the induced flow discharge port 30b may be provided at arbitrary positions regardless of the presence or absence of walls according to the work purpose or work form.

  Further, as shown in FIG. 6, the cutoff flow discharge port 30a and the induction flow discharge port 30b are configured to be continuous over a plurality of surfaces of the outer peripheral surface 12d (the three surfaces on the left and right sides and the rear in FIG. 6). May be.

  Further, FIG. 2 illustrates a case where three discharge fans 36 are provided and air is blown out from the corresponding cut-off flow discharge ports 30a and induction flow discharge ports 30b, but this embodiment has such a configuration. It is not limited. The number of the discharge fans 36 is reduced (for example, as a single discharge fan), and the air flow is branched to discharge the cut-off flow and the induced flow from the cut-off flow discharge port 30a and the induction flow discharge port 30b, respectively. Also good. By doing in this way, a number of parts can be reduced.

  As shown in FIG. 1, for example, a cooking utensil 70 (heating device) is provided below the exhaust device 10 a, and a pan (not shown) or the like is placed on the cooking utensil 70. Oil smoke or water vapor (hereinafter referred to as “oil smoke”) generated from a pan or the like is sucked into the exhaust fan 34 and flows into the suction flow path 22 from the suction port 20 as indicated by an arrow D. The suction flow sucked from the suction port 20 is sucked into the exhaust fan 34 through the suction flow path 22. Thereafter, the exhaust fan 34 exhausts the sucked suction flow to the outside from the exhaust port 24 as indicated by an arrow E.

  As shown in FIG. 1, the suction port 20 is provided with a rectifying plate 48. As illustrated in FIG. 4, the rectifying plate 48 has a substantially rectangular shape having an area smaller than the area of the suction port 20, and is provided at a substantially central portion of the suction port 20. Further, as shown in FIG. 1, the rectifying plate 48 is provided such that the lower surface of the rectifying plate 48 is positioned above the lower surface of the casing lower portion 12 a.

FIG. 7 is a schematic side view for explaining the effect of the rectifying plate 48.
Since the exhaust device 10 a includes the rectifying plate 48, the suction flow is sucked from the narrow gap 22 b between the rectifying plate 48 and the side surface 22 a of the suction flow path 22. The gap 22 b exists along the periphery of the rectifying plate 48. Since the area of the gap 22b is sufficiently narrower than the area of the suction port 20, a suction flow including oil smoke generated from a pan or the like flows into the gap 22b at a higher flow rate. Therefore, as shown by the arrow D, even the suction flow that hits the rectifying plate 48 is sucked toward the gap 22b and the collection performance can be improved.

  On the other hand, when the suction flow hitting the current plate 48 is sucked into the gap 22b, the suction flow that could not flow into the gap 22b hits the side surface 22a. For this reason, the suction flow is unlikely to flow in the direction of the induction flow discharge port 30b, and interference between the suction flow (arrow D) and the second discharge flow 62 (arrow C) discharged from the induction flow discharge port 30b occurs. While preventing, the collection performance can be improved.

  Since most of the suction flow first hits the rectifying plate 48, oil generated from a pan or the like often adheres to the rectifying plate 48 in the exhaust device 10a. Therefore, it is often sufficient to clean the rectifying plate 48, and the effect of improving the ease of cleaning of the exhaust device 10a is also obtained.

  Further, the lower surface of the rectifying plate 48 and the lower surface of the casing lower portion 12a may be substantially the same surface. In this case, the current plate 48 can be easily cleaned.

Next, the effect of this embodiment will be described with reference to FIG.
FIG. 8 is a schematic side view for explaining the effect of the present embodiment. As shown in FIG. 8, the pan 72 is placed on the cooking utensil 70. The pot 72 is heated, and as a result, an upward air flow 64 indicated by an arrow F is formed above the pot 72.

  First, the air discharged from the cutoff flow outlet 30a will be described. The air discharged from the cutoff flow outlet 30a forms a so-called air curtain.

  As represented by an arrow B in FIG. 8, a space (exhaust target space 50. In general, a space in which a relatively large amount of oil smoke or the like to be removed exists due to the air discharged from the cutoff flow outlet 30a (first discharge flow 60). The space below the exhaust device 10a and its vicinity) and the outer space (external space 52) are divided, and the movement of gas between the exhaust target space 50 and the external space 52 is blocked. That is, the first discharge flow 60 prevents oil smoke or the like in the exhaust target space 50 from flowing out to the external space 52, and an air flow (disturbance flow 66, arrow W) existing in the external space 52 is exhausted. It plays the role of a cutoff flow (air curtain) that prevents entry into the target space 50. As a result, oily smoke or the like is well guided to the suction port 20 and appropriately exhausted. Hereinafter, the first discharge flow 60 is referred to as a “cutoff flow 60”.

  The flow rate, flow velocity, and direction of the cutoff flow 60 can be adjusted by appropriately selecting the shape of the cutoff flow discharge channel 28a.

  For example, as shown in FIG. 8, the cross-sectional area of the cutoff flow discharge flow path 28a can be made larger than the cross-sectional area of the induced flow discharge flow path 28b. Thereby, the cutoff flow 60 has a relatively large flow rate, and a relatively strong air curtain is formed.

  Moreover, the cutoff flow discharge channel 28a can be configured to narrow toward the cutoff flow discharge port 30a (so-called tapered shape). Thereby, the interruption | blocking flow 60 discharged from the interruption | blocking flow discharge outlet 30a becomes comparatively quick, and a comparatively strong air curtain is formed. The speed of the cutoff flow 60 may be, for example, 1.5 to 5 m / second in the vicinity of the cutoff flow outlet 30a, and the vertical downward component of the wind speed at the position of the upper surface of the cooking utensil 70 may be 0.5 m / second or more.

  Further, the horizontal inner surface of the cutoff flow discharge channel 28a can be inclined in the horizontal direction outward and obliquely downward toward the cutoff flow discharge port 30a. As a result, the cutoff flow 60 is discharged obliquely downward and in a direction that does not interfere with the second discharge flow 62 (inductive flow 62, arrow C). Thereby, since the cutoff flow 60 and the induced flow 62 do not interfere with each other, an appropriate flow rate, flow velocity, and direction are ensured in each of the cutoff flow 60 and the induced flow 62.

  However, the shape of the cut-off flow discharge channel 28a is not limited to this, and can be selected from a wide range according to work conditions and the like. For example, depending on the strength of the turbulent flow 66, the cross-sectional area of the shut-off flow discharge passage 28a may be further increased, conversely reduced, or a different taper shape, or the cross-sectional area may be uniform. Thus, the flow rate and flow velocity of the cutoff flow 60 may be set to different values. Further, for example, depending on the position where the disturbance flow 66 exists, the direction of the cutoff flow discharge flow path 28a is set to another direction such as a horizontal direction within a range where the disturbance flow 66 does not interfere, and the cutoff flow 60 is discharged in another direction. You may do it.

  Next, the air discharged from the induction flow outlet 30b will be described. The air discharged from the induced flow discharge port 30b performs a function of guiding oil smoke or the like in the exhaust target space 50 to the suction port 20.

First, the significance of forming such an induced flow will be described.
As described above, by providing the cutoff flow 60, gas movement between the exhaust target space 50 and the external space 52 is blocked. However, the cutoff flow 60 is not necessarily formed so as to completely seal the exhaust target space 50. As described above, in general, it is considered preferable that no airflow exists in the region where the worker or the cook is located, from the viewpoint of securing a good working environment or cooking environment. For this reason, the cutoff flow 60 is not provided in such a region, and the exhaust target space 50 may not be sealed.

  Further, when the cutoff flow 60 is formed by a plurality of cutoff flow outlets 30 a, there is a possibility that a gap is generated between the plurality of cutoff flows 60.

  Even when the cutoff flow 60 is formed so as to cover the periphery of the exhaust target space 50, the disturbance flow 66 passes through the cutoff flow 60 and passes through the cutoff target space 50 due to the properties (flow velocity, flow rate, etc.) of the disturbance flow 66. There is a possibility of entering.

  In addition, when an object or a person exists in the passage area of the cutoff flow 60, the article or person interrupts the flow of the cutoff flow 60. Depending on the situation of work and cooking, it is conceivable that a work tool, a cooking utensil, or a worker or a cook is temporarily present in the passage area of the cutoff flow 60. In this case, the cutoff flow 60 does not exist in the lower region.

  Therefore, in general, it is difficult to form a structure in which the cutoff flow 60 completely seals the exhaust target space 50, and it is considered that some kind of gas movement occurs between the exhaust target space 50 and the external space 52. That is, part of the oil smoke or the like may flow out to the external space 52.

  For this reason, it is desirable to promptly guide oil smoke or the like toward the suction port 20. Therefore, in this embodiment, the second discharge flow 62 is discharged from the induction flow discharge port 30b to form the induction flow.

Next, the formation process and operation of the induced flow will be described.
As shown by the arrow C in FIG. 8, the air (second discharge flow 62) discharged from the induction flow discharge port 30b flows below the exhaust device 10a. At this time, it is considered that the atmospheric pressure around the horizontal direction of the cooking utensil 70 (near the side surface of the pan 72) is relatively low due to the rising airflow 64.

  Here, the second discharge flow 62 can be configured to reach the position of the upper surface of the cooking utensil 70 (heating device). Further, the second discharge flow 62 can reach the periphery in the horizontal direction of the cooking utensil 70 by disposing the induction flow outlet 30b on the outer side in the horizontal direction from the cooking utensil 70, for example.

  Thereby, the second discharge flow 62 is directed in the direction of the cooking utensil 70 due to the influence of the low pressure region (region having a relatively low atmospheric pressure) generated around the horizontal direction of the cooking utensil 70 at the height of the cooking utensil 70. It is thought that it is attracted to. As a result, the second discharge flow 62 makes the smoke and the like in the exhaust target space 50 better in the direction of the suction port 20 as shown by the arrow D due to the action of the rising air flow resulting from the heating of the cooking utensil 70 thereafter. Can lead. That is, an induced flow is formed. Hereinafter, the second discharge flow 62 is referred to as “induction flow 62”. Thereafter, the induction flow 62, oily smoke, and the like flow into the suction flow path 22 from the suction port 20, and are exhausted to the outside by the mechanism described above.

  The flow rate, flow velocity, and direction of the induced flow 62 can be adjusted by appropriately selecting the shape of the induced flow discharge channel 28b. It is desirable that the flow rate and flow rate of the induction flow 62 be lower than the flow rate and flow rate of the cutoff flow 60. The cut-off flow 60 has an action of forming a strong air curtain for blocking disturbance, whereas the induced flow 62 only needs to be able to adjust the air flow so that an appropriate suction air flow is formed in the exhaust target space 50. It is.

  For example, as shown in FIG. 8, the cross-sectional area of the induced flow discharge channel 28b can be made relatively small. Moreover, the cross-sectional area of the induced flow discharge channel 28b can be made uniform. As a result, the induction flow 62 has an appropriate flow rate and flow velocity. That is, the induced flow 62 can reach the vicinity of the surface well without colliding with the surface on which the cooking utensil 70 is installed and causing a large disturbance. As the speed of the induced flow 62, for example, the vertical downward component of the wind speed in the vicinity of the height of the cooking utensil 70 may be 0.5 m / second or less.

  Further, as shown in FIG. 8, the induced flow discharge channel 28b can be provided vertically. As a result, the induced flow 62 is discharged substantially vertically downward from the induced flow discharge port 30b, and interference between the cutoff flow 60 (arrow B) and the induced flow 62 (arrow C) is avoided.

  However, the shape of the induced flow discharge channel 28b is not limited to this, and can be selected from a wide range according to the work situation and the like. For example, depending on the type of the cooking utensil 70, the cross-sectional area of the induction flow discharge channel 28b may be further increased, or conversely, may be reduced, or may be tapered. For example, when the cooking utensil 70 is an IH cooker, the upward air flow 64 is considered to be relatively small, so that the cross-sectional area of the induced flow discharge channel 28b is increased or the tapered flow discharge port 30b side is tapered. The flow rate and flow velocity of the induced flow 62 can be made relatively large by, for example, forming a shape.

  Further, the direction of the induced flow discharge channel 28b can be in any form as long as the blocking flow 60 (arrow B) and the induced flow 62 (arrow C) do not interfere with each other. For example, the configuration shown in FIG. 9 may be used.

  FIG. 9 is a schematic cross-sectional view illustrating another configuration of the induced flow discharge channel 28b. As shown in FIG. 9A, the induced flow discharge flow path 28b may be inclined outward in the horizontal direction and obliquely downward toward the induced flow discharge port 30b. Alternatively, as shown in FIG. As shown, it may be inclined horizontally inward and obliquely downward toward the induced flow outlet 30b. Since the cutoff flow 60 and the induced flow 62 do not interfere with each other, an appropriate flow rate, flow velocity, and direction are ensured in each of the cutoff flow 60 and the induced flow 62.

  As described above, according to the present embodiment, the influence of the disturbance flow 66 is blocked by the blocking flow 60, and oil smoke or the like is promptly guided toward the suction port 20 by the induced flow 62. Thereby, oil smoke etc. are exhausted favorably.

  In particular, when the cooking utensil 70 is an IH cooker (electromagnetic cooker), since the rising air flow 64 is relatively small, it takes a relatively long time for the oil smoke or the like to reach the suction port 20, and the oil smoke or the like is in the external space. The possibility of outflow to 52 increases. The effect of the present embodiment is particularly effective in such a case.

(Other examples)
Next, another specific example will be described.
FIG. 10 is a schematic cross-sectional view seen from the front direction illustrating another specific example (exhaust device 10b) according to the present embodiment. As shown in FIG. 10, the exhaust device 10 b has basically the same structure as the exhaust device 10 a shown in FIGS. 1 to 9, but does not include the rectifying plate 48. Even in such a case, as indicated by the arrow D, the smoke and the like are promptly guided toward the suction port 20 by the induced flow 62.

  Further, the side surface 22a of the suction flow path 22 and the induced flow outlet 30b are relatively separated from each other. Thereby, interference with the induced flow 62 (arrow C) heading downward and the suction flow (arrow D) sucked by the suction port 20 is suppressed.

  Moreover, FIG. 11 is a schematic cross-sectional view seen from the front direction, illustrating still another specific example (exhaust device 10c) according to the present embodiment. As shown in FIG. 11, the exhaust device 10c has basically the same structure as the exhaust device 10a shown in FIGS. 1 to 9, but the cutoff flow discharge port 30a is provided on the outer peripheral surface 12d of the casing lower part 12a. It has been. Further, the lower end of the cutoff flow discharge port 30 a is disposed above the suction port 20. Further, the cut-off flow discharge channel 28a is inclined outward in the horizontal direction and obliquely downward toward the cut-off flow discharge port 30a. By adopting such a configuration, interference between the cutoff flow 60 (arrow B) and the induced flow 62 (arrow C) is further suppressed.

  Further, the side surface 22a of the suction flow path 22 and the induced flow outlet 30b are relatively separated from each other. Thereby, interference with the induced flow 62 (arrow C) heading downward and the suction flow (arrow D) sucked by the suction port 20 is suppressed.

  FIG. 12 is a schematic cross-sectional view seen from the front direction, illustrating still another specific example (exhaust device 10d) according to the present embodiment. As shown in FIG. 12, the exhaust device 10 d has basically the same structure as the exhaust device 10 c shown in FIG. 11, but the casing lower part 12 a of the exhaust device 10 d has a slope 12 e that faces the outside in the horizontal direction and obliquely downward. In the lower part of the outer peripheral surface 12d, and the cutoff flow outlet 30a is provided on the inclined surface 12e. Here, the slope facing the outer side in the horizontal direction and obliquely downward means the slope in which the vertical direction (normal direction) with respect to the slope is directed outward in the horizontal direction and obliquely downward. Even in such a form, interference between the cutoff flow 60 (arrow B) and the induced flow 62 (arrow C) is sufficiently suppressed.

  Further, the side surface 22a of the suction flow path 22 and the induced flow outlet 30b are relatively separated from each other. Thereby, interference with the induced flow 62 (arrow C) heading downward and the suction flow (arrow D) sucked by the suction port 20 is suppressed.

  FIG. 13 is a schematic cross-sectional view seen from the front direction, illustrating still another specific example (exhaust device 10e) according to the present embodiment. As shown in FIG. 13, the exhaust device 10e has basically the same structure as the exhaust device 10d shown in FIG. 12, but the cutoff flow discharge passage 28a is narrowed toward the cutoff flow discharge port 30a. It has become. By adopting such a configuration, interference between the cutoff flow 60 (arrow B) and the induced flow 62 (arrow C) is sufficiently suppressed. Moreover, the flow velocity of the cutoff flow 60 becomes high, and a more vigorous air curtain can be formed. Thereby, it is possible to more reliably block the suction flow generated from the pan 72 and the like from diffusing around the cooking utensil 70, and to improve the collection performance. Furthermore, the opening area of the cutoff flow outlet 30a is relatively small. Therefore, the exhaust system 10e as a whole can have a clean structure.

  Further, the side surface 22a of the suction flow path 22 and the induced flow outlet 30b are relatively separated from each other. Thereby, interference with the induced flow 62 (arrow C) heading downward and the suction flow (arrow D) sucked by the suction port 20 is suppressed.

  FIG. 14 is a schematic cross-sectional view seen from the left side direction, illustrating still another specific example (exhaust device 10f) according to the present embodiment.

  The exhaust device 10f shown in FIG. 14 has basically the same structure as the exhaust device 10c shown in FIG. 11, but a discharge fan is added. That is, the cutoff flow discharge fan 36a and the induction flow discharge fan 36b are provided corresponding to each of the cutoff flow discharge channel 28a and the induced flow discharge channel 28b. Further, if necessary, the inlet 26 is also provided with a cutoff flow inlet 26a and a guide flow intake 26b corresponding to the cutoff flow discharge fan 36a and the induction flow discharge fan 36b, respectively. The casing 12 does not have the casing middle part 12b, and the casing lower part 12a and the casing upper part 12c are connected. The cutoff flow discharge fan 36a, the induction flow discharge fan 36b, the cutoff flow intake port 26a, and the induction flow intake port 26b are provided inside the casing lower portion 12a.

By adopting such a configuration, the flow rate and flow velocity of the cutoff flow 60 and the induction flow 62 can be easily controlled.
Further, the side surface 22a of the suction flow path 22 and the induced flow outlet 30b are relatively separated from each other. Thereby, interference with the induced flow 62 (arrow C) heading downward and the suction flow (arrow D) sucked by the suction port 20 is suppressed.

  In the exhaust device 10f shown in FIG. 14, the cutoff flow discharge port 30a is provided on the outer peripheral surface 12d, but may be provided on the lower surface of the casing lower portion 12a. Further, in the exhaust device 10f shown in FIG. 14, the induced flow discharge channel 28b is inclined outward in the horizontal direction and obliquely downward toward the induced flow discharge port 30b, but toward the induced flow discharge port 30b. You may incline in the horizontal direction inside and diagonally downward.

  As described above, according to the present embodiment, the influence of the turbulent flow 66 is blocked by the blocking flow 60, and the oil smoke or the like is promptly guided toward the suction port 20 by the induced flow 62, so that the oil smoke or the like is generated. An exhaust device that exhausts well is provided.

The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples. That is, those specific examples modified by those skilled in the art are also included in the scope of the present invention as long as they have the characteristics of the present invention. For example, the elements included in each of the specific examples described above and their arrangement, materials, conditions, shapes, sizes, and the like are not limited to those illustrated, and can be changed as appropriate.
Moreover, each element with which each embodiment mentioned above is provided can be combined as long as technically possible, and the combination of these is also included in the scope of the present invention as long as it includes the features of the present invention.

It is a model side view which illustrates the kitchen in which the exhaust apparatus which concerns on embodiment of this invention was installed. It is a bottom view of the exhaust apparatus which concerns on this example. It is the schematic diagram which looked at the exhaust apparatus which concerns on this example from diagonally upward. It is the schematic diagram which looked at the exhaust apparatus which concerns on this example from diagonally downward. It is a model bottom view which illustrates other composition of interception flow outlet 30a and induction flow outlet 30b. It is a model bottom view which illustrates other composition of interception flow outlet 30a and induction flow outlet 30b. It is a model side view for demonstrating the effect of the baffle plate. It is a model side view for demonstrating the effect of this embodiment. It is a schematic cross section which illustrates other composition of induction flow discharge channel 28b. It is the schematic cross section seen from the front direction which illustrates other specific examples (exhaust device 10b) concerning this embodiment. It is the schematic cross section seen from the front direction which illustrates another example (exhaust device 10c) concerning this embodiment. It is the schematic cross section seen from the front direction which illustrates another example (exhaust device 10d) concerning this embodiment. It is the schematic cross section seen from the front direction which illustrates another example (exhaust device 10e) concerning this embodiment. It is the schematic cross section seen from the left side surface which illustrates another example (exhaust device 10f) concerning this embodiment.

Explanation of symbols

10a Exhaust device 10b Exhaust device 10c Exhaust device 10d Exhaust device 10e Exhaust device 10f Exhaust device 12 Casing 12a Casing lower part 12b Casing intermediate part 12c Casing upper part 12d Outer peripheral surface 20 Suction port 22 Suction channel 22a Side surface 22b Gap 24 Exhaust port 26 Suction port 26a Cut-off flow intake port 26b Guide-flow intake port 28 Discharge flow channel 28a Cut-off flow discharge flow channel 28b Guide-flow discharge flow channel 30a Cut-off flow discharge port 30b Guide-flow discharge port 34 Exhaust fan 36 Discharge fan 36a Cut-off flow discharge fan 36b Guided flow Discharge fan 48 Rectifier plate 50 Exhaust target space 52 External space 60 First discharge flow, cutoff flow 62 Second discharge flow, induction flow 64 Updraft 66 Disturbance flow 70 Cooking utensil 72 Pan A Arrow B Arrow C Arrow D Arrow E Arrow F Arrow W Arrow

Claims (5)

An exhaust device installed above the heating device,
A suction port that faces the heating device and into which a suction flow flows;
A first discharge port that is provided on the outside in the horizontal direction of at least a portion of the suction port and discharges a first discharge flow;
A second discharge port provided between the suction port and the first discharge port and discharging a second discharge flow;
With
The first discharge flow forms a blocking flow that blocks gas movement between the exhaust target space and the external space;
The exhaust apparatus according to claim 2, wherein the second discharge flow forms an induction flow that guides a gas in the vicinity of the heating device toward the suction port.   2. The exhaust apparatus according to claim 1, wherein the first discharge flow is discharged from the first discharge port in an obliquely downward direction and in a direction not interfering with the second discharge flow.   The exhaust device according to claim 1, wherein the second discharge flow reaches a vicinity of an upper surface of the heating device.   The exhaust device according to any one of claims 1 to 3, wherein the second discharge port is provided on the outer side in the horizontal direction than the heating device.   The exhaust device according to any one of claims 1 to 4, wherein the first discharge flow exceeds the second discharge flow in at least one of a flow rate and a flow velocity.

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