JP2010190458A - Exhaust air blowing system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an exhaust air blowing system capable of appropriately exhausting contaminated air within a space by forming an air curtain after negative pressure is formed. <P>SOLUTION: The exhaust air blowing system includes: an exhaust device having a suction port for sucking gas in the exhaust space; and an air blowing device having a discharge port from which gas forming a shielding flow to suppress movement of gas between the exhaust space and an external space outside the exhaust space is discharged. When instruction to start the operation of the exhaust air blowing system is received, the operation of the exhaust device is started, and then, the operation of the air blowing device is started. <P>COPYRIGHT: (C)2010,JPO&INPIT

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 JP2002-95998 JP2008-70049

  However, the air curtain device described in Patent Document 1 and the local cleaning system described in Patent Document 2 form a negative pressure for exhausting gas because the wind speed of the suction flow formed by the exhaust device is slow. It takes time to do so, and even if an air curtain is formed by a blower before the negative pressure is formed, there is a problem that contaminated air is diffused.

  The present invention has been made based on recognition of such a problem, and provides an exhaust air blowing system capable of appropriately exhausting contaminated air in a space by forming an air curtain after forming a negative pressure. The purpose is to do.

  In order to solve the above problems, according to one aspect of the present invention, an exhaust air blowing system according to the present invention includes an exhaust device having a suction port for sucking gas in an exhaust space, the exhaust space, and an external space outside the exhaust device. And an air blower having a discharge port through which a gas that forms a cut-off flow that suppresses the movement of the gas is discharged, and receives an instruction to start operation of the exhaust air blow system Sometimes, the operation of the exhaust device is started, and then the operation of the blower device is started.

  ADVANTAGE OF THE INVENTION According to this invention, the exhaust ventilation system which can exhaust appropriately the contaminated air in space is provided.

1 is a schematic cross-sectional view illustrating an exhaust ventilation system 1 according to an embodiment of the invention. It is a model bottom view which illustrates an exhaust ventilation system. It is a flowchart which illustrates the operation | movement aspect of an exhaust ventilation system. It is the model perspective view seen from diagonally upward which illustrates an exhaust ventilation system. It is the model perspective view seen from diagonally downward which illustrates an exhaust ventilation system. It is a schematic diagram which illustrates the other structure of an exhaust ventilation system. It is a model perspective view which illustrates the air blower using an ion wind. It is a model perspective view which illustrates the air blower using an ion wind. It is a schematic cross section of the exhaust ventilation system which concerns on the comparative example contrasted with this embodiment. It is a schematic cross section of the exhaust ventilation system concerning 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.

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 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 start the operation of the exhaust air blowing system 1, the operation of the exhaust device 2 is started, and after a certain time has elapsed, the air blowing device 3. Operation starts. Thereby, as will be described later, the contaminated air in the space is appropriately exhausted.

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 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.

  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. For example, the velocity of the discharge flow 60 may be 1.5 to 5 m / second in the vicinity of the discharge port 30, and the vertical downward component of the wind speed at the position of the upper surface of the cooking utensil 70 may be 0.4 m / second or more.

  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, the discharge port 30 may be provided in the outer peripheral surface 12d of the casing lower part 12a, 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.

  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.
In the case of the ionic wind type blower 3, since the ionic wind is an air flow with less turbulence, it is possible to appropriately exhaust air without disturbing or diffusing the oil smoke generated from the pan 72 or the like.

(Effect of this embodiment)
Next, the effect of this embodiment will be described with reference to FIGS. 3, 9, and 10.
FIG. 9 is a schematic cross-sectional view of an exhaust air blowing system according to a comparative example compared with the present embodiment. FIG. 10 is a schematic cross-sectional view of the exhaust air blowing system according to the present embodiment.

  As shown in FIG. 9, since the wind speed of the suction flow D is slow, a negative pressure cannot be formed immediately below the exhaust device 2 immediately after the exhaust device 2 starts operating. The reason why the wind speed of the suction flow D is low is that suction is performed in a wide area and in many directions on the suction side. Therefore, it takes time until the negative pressure is formed, and even if the air curtain is formed by the blower 3 before the negative pressure is formed, not only the energy of the blower 3 is consumed unnecessarily, but also the pan 72 or the like. There is a possibility that oil smoke or the like (contaminated air 504) generated from the air will be diffused.

Therefore, in the present embodiment, as described above with reference to FIG. 3, when an instruction to start the operation of the exhaust air blowing system 1 is received, the operation of the exhaust device 2 starts, and after a certain time has elapsed, the operation of the air blower 3 is started. Is configured to start.
As shown in FIG. 10, when an instruction to start operation of the exhaust air blowing system 1 is received and a certain time has elapsed since the operation of the exhaust device 2 is started, a negative pressure is formed immediately below the exhaust device 2. Under such circumstances, by starting the operation of the blower 3, the contaminated air 504 is smoothly sucked from the suction port 20 and appropriately exhausted by the exhaust device 2. In addition, energy saving can be achieved by operation with the minimum necessary energy.
In FIG. 10, 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 the ionic wind is used.

  Thus, according to this embodiment, after forming the negative pressure by the suction flow D, the air curtain is formed by the air blower 3 so that the contaminated air 504 in the space is appropriately exhausted. As a result, 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. 11 is a flowchart illustrating another configuration of the present embodiment.

  As shown in FIG. 11, the operation of the blower 3 can be started after a predetermined time has elapsed since the start of the operation of the exhaust device 2. In FIG. 1, the predetermined time can be appropriately selected in consideration of the arrangement of the exhaust device 2, the blower 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. If only this time has elapsed, the gas in the vicinity of the upper surface of the cooking utensil 70 reaches the suction port 20 due to the formation of negative pressure by the suction flow D, and the contaminated air 504 existing below the exhaust blower system 1 can be reliably exhausted. it can.

Next, FIG. 12 is a flowchart illustrating still another configuration of the present embodiment.
FIG. 13 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. And when ozone concentration exceeds predetermined concentration, it can be set as the driving | operation which increases the air volume of the exhaust apparatus 2. FIG. At that time, if the air volume is maximum (strong), a warning sound is issued and the blower 3 can be stopped. 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.

Next, FIG. 14 is a schematic cross-sectional view illustrating still another configuration of the present embodiment.
The blower 3 can change the discharge direction of the discharge flow 60 according to the air volume of the exhaust device 2 that starts operation first.

  First, as shown in FIG. 14A, when the air volume of the exhaust device 2 is large, the discharge direction of the discharge flow 60 can be discharged in a direction far away from the exhaust device 2 (angle θ = large). . On the other hand, as shown in FIG. 14B, when the air volume of the exhaust device 2 is small, the discharge direction of the discharge flow 60 can be discharged in a direction (angle θ = small) close to the vertical downward direction. In this way, by changing the discharge direction of the discharge flow 60 according to the air volume of the exhaust device 2, the discharge flow 60 is less likely to interfere with the suction flow D, so that the disturbance of the suction flow D can be prevented. , Optimal exhaust can be performed.

Further, the blower 3 may change the wind speed of the discharge flow 60 according to the air volume of the exhaust device 2 that starts operation first. That is, when the air volume of the exhaust device 2 is large, the wind speed of the discharge flow 60 can be increased. On the other hand, when the air volume of the exhaust device 2 is small, the wind speed of the discharge flow 60 can be lowered. Accordingly, since the discharge flow 60 is unlikely to interfere with the suction flow D, the discharge flow 60 can be prevented from being disturbed, and optimal exhaust can be performed.
Of course, it is more preferable that both the discharge direction of the discharge flow 60 and the wind speed are interlocked according to the air volume of the exhaust device 2 that starts operation first.

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.

DESCRIPTION OF SYMBOLS 1 ... Exhaust ventilation system 2 ... Exhaust device 3 ... Blower 3A ... Unit blower 3B ... Unit blower 4 ... Ozone sensor (ozone concentration detection means)
DESCRIPTION OF SYMBOLS 12 ... Casing 12a ... Casing lower part 12b ... Casing middle part 12c ... Casing upper part 12d ... Outer peripheral surface 20 ... Suction port 22 ... Suction flow path 22a ... Side 22b ... Gap 24 ... Exhaust port 26 ... Exhaust fan 30 ... Discharge port 34 ... Intake Port 36 ... Discharge fan 38 ... Discharge flow path 48 ... Rectification plate 50 ... Exhaust space 52 ... External space 60 ... Discharge flow 70 ... Cooking utensil 72 ... Pan 202 ... Discharge electrode 202p ... Projection part 203 ... Opposite electrode 210 ... DC power supply 504 ... Contaminated air A ... Arrow B ... Cutoff flow C ... Inductive flow D ... Suction flow E ... Arrow F ... Arrow G ... Upward air flow W ... Disturbance flow

Claims (3)

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 start operation of the exhaust air blowing system, the operation of the exhaust device is started, and thereafter, the operation of the air blowing device is started.   The exhaust air blowing system according to claim 1, wherein the operation of the air blower is started after the operation of the air exhaust device is started and a preset predetermined time has elapsed.   The blower device is a blower device that includes a discharge electrode and a counter electrode, and forms an ionic wind by providing a potential difference between the discharge electrode and the counter electrode. Item 3. The exhaust air blowing system according to Item 1 or 2.

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