JP5169791B2 - Exhaust ventilation system - Google Patents

Description

  The present invention relates to an exhaust air blowing system, and more particularly to an exhaust air blowing system 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 conventional kitchens, there are walls around the exhaust system and cooking utensils, so it is difficult for oil smoke and odor to diffuse, and oil smoke and odor can be collected relatively easily. 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.

  Therefore, a device has been proposed that collects and exhausts the oily smoke and odor while blowing off the gas flow and blocking the diffusion of the oily smoke and odor rising from the cooking utensil by the air curtain formed thereby ( For example, Patent Document 1, Patent Document 2, and Patent Document 3).

An ion wind may be used for an air curtain as disclosed in Patent Document 2. The ion wind is generated by applying a voltage between the discharge electrode and the counter electrode to generate corona discharge. Corona discharge ionizes molecules in the space, and the ionized molecules flow toward the counter electrode, but some molecules are released into the room. This molecular flow forms an ionic wind.
JP 2003-207187 A JP 2002-95998 A JP 2008-70049 A

  The present invention provides an exhaust air blowing system capable of appropriately exhausting contaminated air resulting from a blower.

According to one aspect of the present invention, an exhaust device having a suction port for sucking a gas in an exhaust space, and a gas that forms a cutoff flow that suppresses the movement of gas between the exhaust space and an external space outside the exhaust device. a blower having a discharge port to be ejected, and an exhaust blower system with a prior the gas discharged from Ki吐 outlet induced flow to induce the gas in the exhaust space in the direction of the suction opening When the instruction to stop the operation of the exhaust air blowing system is received, the induced flow increases, and then the operation of the air blowing device stops, and then the operation of the exhaust air device An exhaust air blowing system is provided that is stopped.
According to another aspect of the present invention, the exhaust device having a suction port for sucking the gas in the exhaust space, and the cutoff flow that suppresses the movement of the gas between the exhaust space and the outer space outside the exhaust space. An exhaust blower system having a discharge port through which a gas to be formed is discharged, and when receiving an instruction to stop the operation of the exhaust blower system, the operation of the blower is stopped, Thereafter, the operation of the exhaust device is stopped, and the blower device has a discharge electrode and a counter electrode, and forms an ion wind by providing a potential difference between the discharge electrode and the counter electrode. The blower device further includes ozone concentration detecting means for detecting the concentration of ozone, and the time during which the operation of the exhaust device continues after the operation of the blower device is stopped is detected by the ozone concentration detection means. The ozone concentration is An exhaust ventilation system, which is a time until the following is provided.

  ADVANTAGE OF THE INVENTION According to this invention, the exhaust ventilation system which can exhaust appropriately the polluted air resulting from an air blower is provided.

1st invention discharges the gas which forms the cutoff flow which suppresses the movement of the exhaust apparatus which has the suction port which attracts | sucks the gas of exhaust space, and the said exhaust space, and the external space outside it An exhaust blower system having a discharge port, and when receiving an instruction to stop the operation of the exhaust blower system, the operation of the blower device is stopped, and then the operation of the exhaust device Is an exhaust air blowing system characterized by stopping.
According to this exhaust ventilation system, an exhaust ventilation system that can appropriately exhaust polluted air resulting from the blower is provided.

According to a second invention, in the first invention, the gas discharged from the discharge port can further form an induced flow for guiding the gas in the exhaust space toward the suction port, The exhaust air flow is characterized in that when the instruction to stop the operation of the air blowing system is received, the induced flow increases, the operation of the air blowing device is stopped thereafter, and the operation of the air exhaust device is stopped thereafter. System.
According to this exhaust ventilation system, the contaminated air resulting from the blower can be exhausted satisfactorily.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the time that the operation of the exhaust device continues after the operation of the blower is stopped is a predetermined time set in advance. Blower system.
According to this exhaust air blowing system, the contaminated air resulting from the air blower can be exhausted more satisfactorily.

According to a fourth invention, in the first or second invention, the blower device includes a discharge electrode and a counter electrode, and a potential difference is provided between the discharge electrode and the counter electrode. An air blower that forms ionic wind, further comprising ozone concentration detection means for detecting the concentration of ozone, and the time during which the operation of the exhaust device continues after the operation of the blower stops is the ozone concentration detection means The exhaust air blowing system is characterized in that it is time until the concentration of ozone detected by the apparatus becomes equal to or lower than a predetermined concentration.
According to this exhaust air blowing system, it is possible to continue the exhaust appropriately until the ozone caused by the air blower using ion wind or the like becomes below a predetermined concentration.

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 cross-sectional view illustrating an exhaust blower system 1 according to an embodiment of the invention.
FIG. 2 is a schematic bottom view illustrating the exhaust air blowing system 1.
FIG. 3 is a flowchart illustrating an operation mode of the exhaust air blowing system 1.

  The exhaust air blowing system 1 according to the present embodiment is installed above a cooking utensil 70 such as a heating cooker, for example, and has an exhaust device 2 having a suction port 20 that sucks the gas in the exhaust space 50 to form a suction flow D. The air blower 3 having the discharge port 30 through which the gas forming the cutoff flow B that suppresses the movement of the gas between the exhaust space 50 and the external space 52 of the exhaust device 2 is discharged. The gas discharged from the discharge port 30 is referred to as “discharge flow 60”.

  Then, as shown in FIG. 3, when the exhaust air blowing system 1 receives an instruction to stop the operation of the exhaust air blowing system 1, the operation of the air blowing device 3 is stopped, and after a certain time has elapsed, the exhaust device 2. Operation stops. Thereby, the contaminated air resulting from the air blower 3 is appropriately exhausted as will be described later.

Next, the structure of the exhaust ventilation system 1 will be described in detail with reference to FIGS. 1, 2, and 4 to 8.
FIG. 4 is a schematic perspective view of the exhaust air blowing system 1 as viewed from obliquely above.
FIG. 5 is a schematic perspective view of the exhaust air blowing system 1 as viewed from obliquely below.
FIG. 6 is a schematic view illustrating another configuration of the exhaust air blowing system 1. FIG. 6A is a schematic side view, and FIG. 6B is a schematic plan view.

  Hereinafter, although the exhaust ventilation system 1 which has the structure where the exhaust apparatus 2 and the air blower 3 were integrated is demonstrated, the exhaust apparatus 2 and the air blower 3 may be a different body so that it may mention later regarding FIG.

  As shown in FIGS. 1, 2, 4, and 5, the integrated exhaust air blowing system 1 includes a casing 12. The casing 12 includes a substantially rectangular casing lower part 12a, a casing intermediate part 12b extending so as to narrow upward from the casing lower part 12a, and a casing upper part 12c disposed above the casing intermediate part 12b. Yes.

  First, the exhaust device 2 (more specifically, a portion corresponding to the exhaust device 2) will be described. The exhaust device 2 is provided on the center side of the exhaust blower system 1 from the casing lower portion 12a to the casing upper portion 12c. The exhaust device 2 includes a suction port 20, a suction flow path 22, an exhaust fan 26, and an exhaust port 24.

  Below the exhaust blower system 1, for example, a cooking utensil 70 (heating device) is provided, and a pan 72 or the like is placed on the cooking utensil 70. The suction port 20 is provided at the lower end of the casing lower part 12a so as to face the heating device 70, and ascending gas, for example, oil smoke or water vapor generated from the pan 72 or the like (hereinafter referred to as “oil smoke”). Are sucked to form a suction flow D. The suction channel 22 is provided inside the casing lower part 12 a, the casing middle part 12 b, and the casing upper part 12 c, and guides the gas sucked from the suction port 20 to the exhaust fan 26 as indicated by an arrow E. The exhaust fan 26 is provided inside the casing upper portion 12 c, and the exhaust port 24 is provided above the exhaust fan 26. The exhaust fan 26 discharges the sucked gas to the outside from the exhaust port 24 as indicated by an arrow F.

  As shown in FIG. 1 and the like, the suction port 20 may be provided with a rectifying plate 48. 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. Thereby, the gas in the exhaust space 50 is sucked from the narrow gap 22b between the rectifying plate 48 and the side surface 22a of the suction flow path 22 to form a suction flow D. Since the area of the gap 22b is sufficiently narrower than the area of the suction port 20, the suction flow D including the oil smoke generated from the pan or the like flows into the gap 22b at a higher flow rate. For this reason, collection performance can be improved.

  Further, since most of the suction flow D first hits the rectifying plate 48, oil generated from a pan or the like often adheres to the rectifying plate 48. Therefore, it is often sufficient to clean the rectifying plate 48, and the effect of improving the ease of cleaning of the exhaust air blowing system 1 can also be obtained.

  Moreover, although the casing 12 has the casing intermediate part 12b, it is not limited only to this, The casing intermediate part 12b does not need to be provided. In this case, the casing lower part 12a and the casing upper part 12c are connected. In this case, the air blower 3 can be provided, for example, on the ceiling as shown in FIG.

  Next, the blower 3 (more specifically, a portion corresponding to the blower 3) will be described. The blower 3 can be provided at an arbitrary location around the exhaust device 2. For example, as shown in FIG. 1, the blower 3 can be provided on the outer periphery of the exhaust device 2 from the casing lower portion 12 a to the casing intermediate portion 12 b. .

  The blower 3 includes an intake port 34, a discharge fan 36, a discharge flow path 38, and a discharge port 30. As the discharge fan 36, for example, a cross flow fan can be used. The intake port 34 is provided above the discharge fan 36. The gas in the upper part of the casing middle part 12 b passes through the intake port 34 and is taken into the discharge fan 36. This gas is blown out in the direction of the discharge flow path 38 as shown by the arrow A by the discharge fan 36, and then discharged from the discharge port 30 to become a discharge flow 60. The discharge flow 60 divides the exhaust space 50 in which a large amount of oil smoke or the like to be removed exists and the external space 52 existing outside thereof, and the movement of gas between them is suppressed. That is, the discharge flow 60 forms a blocking flow B (air curtain) that suppresses the movement of gas between these spaces. Thereby, the inflow to the exhaust space 50 of the turbulent flow W, that is, the air flow such as air conditioning existing in the external space 52 is suppressed. Moreover, the outflow of oil smoke or the like to the external space 52 is suppressed. As a result, oily smoke or the like is well guided to the suction port 20 and appropriately exhausted.

  Note that the flow rate, flow rate, and direction of the cutoff flow 60 can be adjusted by appropriately selecting the shape of the discharge flow path 38. For example, the flow rate can be increased by increasing the cross-sectional area of the discharge channel 38, and the flow rate can be increased by making the discharge channel 38 narrow toward the discharge port 30 (so-called tapered shape). it can. By these measures, a stronger air curtain can be formed. As the speed of the discharge flow 60, for example, the vertical downward component of the wind speed at the position of the upper surface of the cooking utensil 70 can be set to 0.4 m / second or more in the vicinity of the discharge port 30.

  The discharge port 30 is provided on at least a part of the outer periphery of the suction port 20. For example, as shown in FIG. 2, it is provided on the left and right sides and the back side (rear) on the side where the cook stands (front), and can have a substantially rectangular shape. Alternatively, although not shown, a configuration having a substantially “U” shape that is continuous in these three directions may be used. The discharge port 30 can be provided on the lower surface of the casing lower part 12a as shown in FIG. Further, the discharge port 30 can be provided at a position away from the exhaust port 20 so that the discharge flow 60 does not interfere with the suction flow D. For this reason, you may provide the discharge port 30 in the outer peripheral surface 12d of the casing lower part 12a, etc., for example. Further, in order to suppress such interference, the discharge flow 60 may be discharged obliquely downward and outward of the discharge port 30.

  A total of three discharge fans 36 are provided corresponding to the three directions described above. Further, the number of the discharge fans 36 may be reduced, and for example, as a single discharge fan, the air flow may be branched and the discharge flow 60 may be discharged from the three-way discharge ports 30 described above. By doing in this way, a number of parts can be reduced.

  As shown in FIG. 2, the blower 3 can be configured not to be provided on the front side (the side where the cook stands). Thereby, the discharge flow 60 discharged from the discharge port 30 does not directly hit the cooker, and there is no possibility that the cook will be uncomfortable. Or you may make it the structure by which the air blower 3 is provided also in the front side according to a use purpose or a usage form.

  In addition to forming the cut-off flow B, the discharge flow 60 may form an induced flow C that guides the gas in the exhaust space 50, particularly the gas in the vicinity of the cooking utensil 70, in the direction of the suction port 20. The induced flow C will be described later in detail with reference to FIG.

  Further, although not shown, a wall may be provided on at least one of the rear side and the left and right sides, and the blower 3 may be provided on at least one other side.

  Further, as shown in FIG. 6, the exhaust air blowing system 1 according to the present embodiment may be configured such that the exhaust device 2 and the air blower 3 are separate. In this case, the blower 3 is provided around the exhaust device 2 (for example, the ceiling). The “periphery of the exhaust device 2” can be, for example, a place within about 1 m from the exhaust device 2, or a place farther than that. Also in this case, the discharge flow 60 from the discharge port 30 forms a cutoff flow B, and also forms an induced flow C if necessary. By providing the blower 3 near the exhaust device 2, the induction flow C can be easily formed.

  An ion wind can also be used for the blower 3. As will be described in detail below, the ion wind type blower device has a discharge electrode and a counter electrode, and forms a ionic wind by providing a potential difference between the discharge electrode and the counter electrode. .

7 and 8 are schematic perspective views illustrating the blower 3 using ion wind.
As shown in FIG. 7, the blower 3 includes a discharge electrode 202 and a pair of counter electrodes 203 and 203. The discharge electrode 202 and the counter electrode 203 can be metal plate-like members. The discharge electrode 202 has a protruding portion 202p protruding in the direction of the counter electrode 203 or 203. The discharge electrode 202 is provided above an intermediate position between the counter electrodes 203 and 203, and the protrusion 202 p of the discharge electrode 202 protrudes toward an intermediate position between the counter electrodes 203 and 203.

  A DC power supply 210 is connected to the discharge electrode 202, and a negative voltage is applied. The plus side of the DC power supply 210 and the counter electrodes 203 and 203 are grounded. The positive side of the DC power supply 210 can be connected to the discharge electrode 202, and the negative side of the DC power supply 210 and the counter electrodes 203, 203 can be grounded. In addition, since it is sufficient that a potential difference exists between the discharge electrode 202 and the counter electrodes 203 and 203, the discharge electrode 202 side may be grounded, or either side of the discharge electrode 202 and the counter electrode 203. Also, it may be configured not to be grounded.

  When a voltage of, for example, about −20 kV is applied to the discharge electrode 202 from the DC power supply 210, a potential difference is generated between the discharge electrode 202 and the counter electrode 203, 203, and the electric field strength near the tip of the protrusion 202p is locally increased. It becomes higher and corona discharge occurs. The applied voltage can be set to an arbitrary value according to the use situation, and can be set to about 10 kV to 20 kV, for example. Electrons generated by the corona discharge are drawn downward in the figure by an electric field formed between the discharge electrode 202 and the counter electrodes 203 and 203.

As shown in FIG. 7, when the extracted electrons adhere to gas molecules (for example, water vapor (H ₂ O), oxygen (O ₂ ), etc.), the gas molecules become negatively charged ions. Some of the ions are drawn into the counter electrodes 203 and 203, but the potentials from the left and right counter electrodes 203 and 203 are equipotential near the center of the counter electrodes 203 and 203 in the counter direction, so that the remaining ions are in the center. The light is discharged toward the lower space in the figure so as to pass through the vicinity. Thus, a part of the ions are emitted toward the lower space in the figure by the action of the electric field described above. As a result, a downward flow of gas molecules, that is, a flow of gas called an ionic wind is generated, whereby a discharge flow 60 is formed.

In the ion wind type blower 3, the air volume and the wind speed can be adjusted by changing the applied voltage. Further, the wind direction can be adjusted by changing the arrangement of the discharge electrode 202 and the counter electrode 203.
Further, as shown in FIG. 8, the ion wind type blower 3 can be configured in parallel. At the time of parallelization, the counter electrode 203 can be shared between the adjacent unit blowers 3A and 3B as shown in FIG. 8A, or as shown in FIG. 8B. It is possible to make a configuration that is not shared between the two. With the parallel arrangement, a thicker ion wind can be generated.

Next, the induced flow C will be described with reference to FIG.
FIG. 9 is a schematic cross-sectional view for explaining the induced flow C.
As described above, the discharge flow 60 forms the cut-off flow B, and also forms the induction flow C that guides the gas in the exhaust space 50, particularly the oil smoke in the vicinity of the cooking utensil 70, in the direction of the suction port 20. May be.

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

Further, when the cutoff flow B is formed by a plurality of discharge ports 30, a gap may be generated between the plurality of cutoff flows B.
Even when the cutoff flow B is formed so as to cover the periphery of the exhaust space 50, the disturbance flow W passes through the cutoff flow B and enters the exhaust space 50 due to the nature (flow velocity, flow rate, etc.) of the disturbance flow W. There is a possibility of coming.

Moreover, when a cooking utensil, a cooker, etc. exist in the passage area | region of the cutoff flow B, these utensils and a cook will block the flow of the cutoff flow B. In this case, the cutoff flow B does not exist in the lower region.
Therefore, in general, it is difficult to make the structure in which the cutoff flow B completely seals the exhaust space 50, and it is considered that some gas movement occurs between the exhaust 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 in the direction of the suction port 20, and it is effective to form the induced flow C.

Next, the formation process and operation of the induced flow C will be described.
The discharge flow 60 discharged from the discharge port 30 flows below the exhaust air blowing system 1. Here, as shown in FIG. 9, an upward airflow G exists above the heated pan 72. For this reason, the atmospheric pressure around the horizontal direction of cooking utensil 70 (near the side surface of pan 72) is relatively low. Under such circumstances, the direction and speed of the discharge flow 60 can be selected as appropriate so that the discharge flow 60 reaches the peripheral edge of the upper surface of the cooking utensil 70. Thereby, the discharge flow 60 is attracted to the center of the cooking utensil 70 by the influence of the low pressure region (region having a relatively low atmospheric pressure) generated around the cooking utensil 70 on the upper surface of the cooking utensil 70. As a result, the discharge flow 60 can favorably guide oil smoke and the like in the exhaust space 50 toward the suction port 20 by the action of the rising airflow G. That is, the induced flow C is formed. Thereafter, the induction flow C, the oily smoke, and the like flow into the suction flow path 22 from the suction port 20 as the suction flow D, and are exhausted to the outside by the mechanism described above.

When the IH cooker (electromagnetic cooker) is used as the cooking utensil 70, since the rising airflow G is relatively small, it takes a long time for the oil smoke or the like to reach the suction port 20, and the oil smoke or the like enters the external space 52. The possibility of outflow increases. The effect of the induced flow C is particularly effective in such a case.
In FIG. 9, the blower 3 using the discharge fan 36 is taken as an example, but the same discussion can be made when the blower 3 using ion wind is used.

(Effect of this embodiment)
Next, the effect of this embodiment will be described with reference to FIGS. 3 and 10 to 13.
10 to 13 are schematic cross-sectional views for explaining the effect of the present embodiment.

  By using the exhaust air blowing system including the exhaust device 2 and the air blowing device 3, oily smoke and the like are exhausted, but the cutoff flow B does not necessarily seal the entire lower area of the exhaust air blowing system. Not all of the oily smoke is sucked from the suction port 20. For this reason, a part of the oil smoke or the like may wrap around the exhaust air blowing system as shown in FIGS. 10 (a) and 10 (b), for example. That is, there may be oil smoke 500 or the like around the air inlet 34 or around the discharge electrode 202 (not shown).

  As a result, the oily smoke 500 is sucked into the blower 3 from the air inlet 34 and may adhere to the discharge fan 36, the discharge flow path 38, and the like. Alternatively, the oil smoke 500 may adhere to the discharge electrode 202 or the counter electrode 203 (not shown). As a result, there is a possibility that an oil film 501 that is a film of contaminants such as oil is formed at a location where the oil smoke 500 or the like is attached. Then, a part of the oil in the oil film 501 is discharged to the lower side of the exhaust air blowing system together with the discharge flow 60 when the air blower 3 is in operation, and may become particles 502 of oil or the like and contaminate the room.

  Furthermore, when the air blower 3 using ionic wind is used, ozone 503 may be generated as shown in FIG. That is, when a high voltage is applied to oxygen molecules in the air, oxygen radicals are generated, and the oxygen radicals and oxygen molecules may combine to generate ozone. Even if ozone has a concentration of about 0.02 ppm, a person may feel an irritating odor.

  For this reason, it is required to appropriately exhaust particles 502 such as oil and ozone 503 (hereinafter collectively referred to as “contaminated air 504”).

  Therefore, in the present embodiment, as described above with reference to FIG. 3, when the instruction to stop the operation of the exhaust air blowing system 1 is received, the operation of the air blowing device 3 is stopped, and after a certain time has passed, It is configured to stop operation.

  As shown in FIG. 12, after receiving an instruction to stop the operation of the exhaust air blowing system 1, the contaminated air 504 exists below the exhaust air blowing system 1 when the operation of the air blower 3 is stopped. Under such circumstances, when the exhaust device 2 operates for a certain period of time, the contaminated air 504 is sucked from the suction port 20 and appropriately exhausted by the exhaust device 2.

  Further, as shown in FIG. 13, the induced flow C can be used. That is, the blower 3 may further form an induced flow C that guides the gas in the exhaust space 50 in the direction of the suction port 20 at least when an instruction to stop the operation of the exhaust blower system 1 is received. . Further, the induced flow C may be increased when an instruction to stop the operation of the exhaust air blowing system 1 is received. In this case, when the operation stop instruction is received, the induced flow C increases, the operation of the blower 3 is stopped thereafter, and then the operation of the exhaust device 2 is stopped. . As described above with reference to FIG. 9, the induced flow C is formed by appropriately selecting the wind direction and the wind speed of the discharge flow 60 so that the discharge flow 60 reaches the peripheral edge of the upper surface of the cooking utensil 70. Thereby, the contaminated air 504 is exhausted more satisfactorily.

First, as shown in FIG. 13A, after receiving an instruction to stop the operation of the exhaust air blowing system 1, the contaminated air 504 is placed below the exhaust air blowing system 1 when the operation of the air blower 3 is stopped. Exists. Thereafter, as shown in FIGS. 13B and 13C, the contaminated air 504 is guided by the induced flow C and proceeds toward the suction port 20. Then, the air is sucked from the suction port 20 as the suction flow D and is appropriately exhausted by the exhaust device 2.
In FIGS. 12 and 13, the blower 3 using the discharge fan 36 is taken as an example, but the same discussion can be made even when the blower 3 using the ion wind is used.

  Thus, according to this embodiment, the contaminated air 504 resulting from the air blower 3 is appropriately exhausted by automatic control. Thereby, after the operation of the exhaust air blowing system 1 is stopped, an oily odor or an ozone odor does not remain, and a comfortable kitchen / living space is realized. The exhaust air blower system 1 according to the present embodiment can be used as an exhaust air blower system that is used for work requiring exhaust air in addition to the kitchen space and the living space.

(Other examples)
Next, another specific example of the present embodiment will be described with reference to FIGS.
FIG. 14 is a flowchart illustrating another configuration of the present embodiment.

  As shown in FIG. 14, the time during which the operation of the exhaust device 2 continues after the operation of the blower 3 is stopped can be a predetermined time set in advance. In FIG. 1, the predetermined time can be appropriately selected in consideration of the arrangement of the exhaust device 2, the blower device 3, and the cooking utensil 70, the wind speed of the discharge flow 60 and the suction flow D, and the like. For example, the blower 3 is provided on the outer periphery of the exhaust device 2, the distance between the suction port 20 and the upper surface of the cooking utensil 70 is about 1 m, and the wind speed of the discharge flow 60 near the cooking utensil 70 and the wind velocity of the suction flow D are 0. If it is about 4-0.5 m / second, it can be set to 2-3 seconds or more. When this time has elapsed, the gas near the upper surface of the cooking utensil 70 reaches the suction port 20, and the contaminated air 504 existing below the exhaust air blowing system 1 can be reliably exhausted.

Next, FIG. 15 is a flowchart illustrating still another configuration of the present embodiment.
FIG. 16 is a schematic side view illustrating an attachment mode of the ozone sensor.
In this configuration, an ion wind type blower is used as the blower 3. In this case, the exhaust air blowing system 1 can further include ozone concentration detecting means (ozone sensor) 4 for detecting the concentration of ozone. As shown in FIG. 15, the fixed time for which the operation of the exhaust device 2 continues after the operation of the blower 3 is stopped is the time until the ozone concentration detected by the ozone sensor 4 becomes a predetermined concentration or less. can do.

As described above, when the ion wind type blower 3 is used, ozone can be generated. With this configuration, ozone can be exhausted sufficiently. For this reason, it is possible to prevent the ozone odor from remaining in the air. This predetermined concentration can be set to, for example, about 0.02 ppm.
The ozone sensor 4 can be provided at an arbitrary place, for example, as shown in FIG. 16, the ozone sensor 4 can be provided in the exhaust device 2, the blower device 3, the cooking utensil 70, or the like.

  In addition, it cannot be overemphasized that this structure is effective also with respect to the exhaust_gas | exhaustion of ozone resulting from other than the air blower 3 using ion wind.

Next, FIGS. 17 and 18 are schematic cross-sectional views illustrating still another configuration of the present embodiment.
As described above with reference to FIG. 13, if the induced flow C is formed when an instruction to stop the operation of the exhaust air blowing system 1 is received, the exhaust can be performed more satisfactorily. For this reason, the angle of the discharge flow 60 can be changed so that the induced flow C is easily formed when the operation stop instruction is received or the induced flow C is easily increased. In other words, the blower 3 can change the discharge direction of the discharge flow 60 during at least a part of the time from when the instruction to stop the operation of the exhaust blower system 1 is received until the operation of the blower 3 stops. .

  First, as shown in FIG. 17A, when the exhaust air blowing system 1 is normally operated, the direction of the discharge flow 60 can be arbitrarily set according to the direction of the disturbance flow W or the like. For example, the discharge flow 60 can be discharged in a direction substantially perpendicular to the direction of the turbulent flow W (the direction of the angle θ1 from the vertically lower direction to the outside of the exhaust air blowing system 1). Thereby, the interruption | blocking flow B (air curtain) is formed appropriately, and the penetration | invasion to the exhaust space 50 of the disturbance flow W can be suppressed appropriately. Further, at this time, the induced flow C may be further formed.

  After that, as shown in FIG. 17B, when the operation of the exhaust air blowing system 1 is stopped, the discharge direction of the discharge flow 60 is changed and stepwise or continuously at an angle (such as θ2) smaller than θ1. The discharge flow 60 is discharged to the side of the cooking utensil 70 (not shown). The discharge direction of the discharge flow 60 can be changed by making the direction of the discharge flow path 38 and the positions of the discharge electrode 202 and the counter electrode 203 variable. In addition, you may make it the discharge direction of the discharge flow 60 change to a reverse direction or another direction according to a condition.

  Thereby, in FIG. 9, the discharge flow 60 can be made to reach the place near the ascending airflow G and the low pressure region around the lower airflow G, and the induced flow C can be appropriately formed. Moreover, when the induced flow C is already formed in the normal operation of FIG. 17A, the induced flow C can be increased. As a result, as shown in FIG. 17C, exhaust can be performed satisfactorily.

  Further, as shown in FIG. 18, the wind speed of the discharge flow 60 may be changed in order to satisfactorily form or increase the induced flow C. That is, the blower 3 can change the discharge speed of the discharge flow 60 during at least a part of time from when the instruction to stop the operation of the exhaust blower system 1 is received until the operation of the blower 3 stops. .

  First, as shown in FIG. 18A, when the exhaust air blowing system 1 is normally operated, the wind speed of the discharge flow 60 can be arbitrarily set in accordance with the wind speed or the air volume of the disturbance flow W. . For example, when the air flow rate and the wind speed of the turbulent flow W are large, the discharge flow 60 having a high wind speed v1 can be discharged. Thereby, the firm interruption | blocking flow B (air curtain) is formed, and the penetration | invasion to the exhaust space 50 of the disturbance flow W can be suppressed appropriately. Further, at this time, the induced flow C may be further formed.

  Thereafter, as shown in FIG. 18B, when the operation of the exhaust air blowing system 1 is stopped, the wind speed of the discharge flow 60 is changed, and the discharge flow 60 is discharged at a velocity v2 lower than v1. The wind speed of the discharge flow 60 can be changed by changing the rotation speed of the discharge fan 36 or changing the applied voltage between the discharge electrode 202 and the counter electrode 203. In addition, you may change the wind speed of the discharge flow 60 in another aspect, such as raising a wind speed according to a condition.

  Accordingly, in FIG. 9, an appropriate wind speed is obtained in a place near the ascending airflow G and a low pressure region around the lower airflow G, that is, the airflow speed is such that the discharge flow 60 is drawn into the ascending airflow G side. The discharge flow 60 can be discharged. As a result, the induced flow C can be appropriately formed. In addition, when the induced flow C is already formed during the normal operation of FIG. 18A, the induced flow C can be increased. Therefore, exhaust can be performed satisfactorily as shown in FIG.

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. In other words, those specific examples that have been appropriately 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, but 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.

1 is a schematic cross-sectional view illustrating an exhaust ventilation system 1 according to an embodiment of the invention. 1 is a schematic bottom view illustrating an exhaust air blowing system 1. FIG. 3 is a flowchart illustrating an operation mode of the exhaust air blowing system 1. 1 is a schematic perspective view illustrating an exhaust air blowing system 1 as viewed from obliquely above. It is the model perspective view seen from the slanting lower part which illustrates the exhaust ventilation system. 3 is a schematic view illustrating another configuration of the exhaust air blowing system 1. FIG. It is a model perspective view which illustrates the air blower 3 using an ion wind. It is a model perspective view which illustrates the air blower 3 using an ion wind. 3 is a schematic cross-sectional view for explaining an induced flow C. FIG. It is a schematic cross section for demonstrating the effect of this embodiment. It is a schematic cross section for demonstrating the effect of this embodiment. It is a schematic cross section for demonstrating the effect of this embodiment. It is a schematic cross section for demonstrating the effect of this embodiment. It is a flowchart which illustrates other composition of this embodiment. It is a flowchart which illustrates another structure of this embodiment. It is a model side view which illustrates the attachment aspect of an ozone sensor. It is a schematic cross section which illustrates another structure of this embodiment. It is a schematic cross section which illustrates another structure of this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Exhaust blower system, 2 Exhaust device, 3 Blower, 3A unit blower, 3B unit blower, 4 Ozone sensor (ozone concentration detection means), 12 casing, 12a casing lower part, 12b casing intermediate part, 12c casing upper part, 12d Outer peripheral surface, 20 suction port, 22 suction flow path, 22a side surface, 22b gap, 24 exhaust port, 26 exhaust fan, 30 discharge port, 34 intake port, 36 discharge fan, 38 discharge flow channel, 48 current plate, 50 exhaust space , 52 External space, 60 Discharge flow, 70 Cooking utensil, 72 Pan, 202 Discharge electrode, 202p Protrusion, 203 Opposite electrode, 210 DC power supply, 500 Oil smoke, 501 Oil film, 502 Oil particle, 503 Ozone, 504 Contamination Air, A arrow, B cutoff flow, C induction flow, D suction flow, E arrow, F arrow, Updraft, W disturbance flow

Claims (4)

An exhaust device having a suction port for sucking gas in the exhaust space;
An air blower having a discharge port through which gas forming a cut-off flow that suppresses movement of gas between the exhaust space and the external space outside the exhaust space is discharged;
An exhaust ventilation system comprising:
Before the gas discharged from Ki吐 outlet induced flow can further be formed to guide the gas in the exhaust space in the direction of the suction opening,
When the instruction to stop the operation of the exhaust air blowing system is received, the induced flow increases, the operation of the air blowing device is stopped thereafter, and the operation of the exhaust device is stopped thereafter. Exhaust blower system. Time operation of the blower continues the operation of the exhaust system from the stop, the exhaust ventilation system of claim 1, wherein it is a preset predetermined time. The blower is
A discharge electrode;
The opposite pole,
Have
A blower that forms an ionic wind by providing a potential difference between the discharge electrode and the counter electrode;
It further comprises an ozone concentration detection means for detecting the concentration of ozone,
The time for which the operation of the exhaust device continues after the operation of the blower is stopped is a time until the concentration of the ozone detected by the ozone concentration detection means becomes a predetermined concentration or less. The exhaust ventilation system according to claim 1 . An exhaust device having a suction port for sucking gas in the exhaust space;
An air blower having a discharge port through which gas forming a cut-off flow that suppresses movement of gas between the exhaust space and the external space outside the exhaust space is discharged;
An exhaust ventilation system comprising:
When receiving an instruction to stop the operation of the exhaust air blowing system, the operation of the air blowing device is stopped, and then the operation of the exhaust device is stopped ,
The blower is
A discharge electrode;
The opposite pole,
Have
A blower that forms an ionic wind by providing a potential difference between the discharge electrode and the counter electrode;
It further comprises an ozone concentration detection means for detecting the concentration of ozone,
The time for which the operation of the exhaust device continues after the operation of the blower is stopped is a time until the concentration of the ozone detected by the ozone concentration detection means becomes a predetermined concentration or less. Exhaust blower system.

Images