JP2016070507A - Range hood - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a range hood improved in cleaning performance.SOLUTION: An exhaust part 12 exhausting collected air includes a cylindrical body 14 having a first air path 34 through which an oily smoke suction port 15 and an oily smoke exhaust port 16 are communicated with each other. A hood function part 13 collecting air comprises: a plurality of arm parts 19 extended in a direction of the oily smoke suction port 15 from the side surface of the body 14; a frame part 20 having a blow-out port 25 at a polygonal inside wall surface 24 formed by connecting the arm part 19 thereto; a plurality of virtual hood plates 27 whose flat surface at a side inner than the end part 26 composed of the arm part 19 and the frame part 20 is hollowed; a second air path 28 through which the suction port 17 and the blowout port 25 are communicated with each other and which is spacially independent from the first air path 34.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a range hood.

  As a conventional range hood, it is a supply / exhaust type range hood that collects exhaust gas containing oily smoke and water vapor in the hood body and then discharges it outdoors via an exhaust duct. It is known that the sucked air is discharged to the outer surface of the hood main body to prevent the oil droplets from adhering to the upper surface of the hood main body and generate an air curtain surrounding the exhaust from the cooker (for example, a patent Reference 1).

  Hereinafter, the range hood will be described with reference to FIG.

  FIG. 8 is a longitudinal front view of the supply / exhaust type range hood 101. In the upper part of the hood main body 102, a first compartment box 104 and a second compartment box 108 which are partitioned in the vertical direction and are adjacent to each other are arranged. A suction port 105 that opens into the hood main body 102 and a discharge port 106 to which the exhaust duct 103 is connected are formed in the first partition box 104, and a sirocco fan 107 is provided in the first partition box 104. . An air supply port 110 connected to an air supply duct 109 that sucks outdoor or indoor air and a discharge port 111 that supplies the sucked air to the inside or the outside of the hood main body 102 are formed in the second compartment 108. At the same time, an air supply fan 112 for sending air toward the discharge port 111 is provided in the second compartment 108, and the air supply fan 112 and the sirocco fan 107 are driven coaxially by one drive motor 113. I have to. A partition cylinder 114 is attached around the first and second partition boxes 104, 108, and a through hole is provided at the lower end of the partition cylinder 114 to allow only the suction port 105 of the first partition box 104 to communicate with the hood body 102. The separator 115 is attached, and an air supply passage 116 is formed between the separator 115 and the partition cylinder 114 and the hood main body 102, and the discharge port of the second compartment 108 is inserted into the air supply passage 116. 111, the opening of the partition cylinder 114, and the inside of the second partition box 108 are communicated with each other through an air supply port 110 formed in the upper portion of the hood main body 102.

  With the above configuration, the above-described supply / exhaust type range hood 101 operates as follows.

  An exhaust passage as shown by a black arrow in FIG. 8 and a supply passage as shown by a white arrow are formed, and each of these passages has a first compartment box 104 and a second compartment adjacent to each other. The boxes 108 are sent without being mixed with each other.

  Air such as outside air sucked into the second compartment 108 by the air supply fan 112 is discharged outside the air supply / exhaust type range hood 101 by the air supply port 110 of the hood main body 102 by the action of the air supply fan 112. is there. As shown by the white arrow in FIG. 8, the discharged air flows down on the upper surface of the hood main body 102 while forming a laminar airflow from below by the exhaust action of the sirocco fan 107. An air curtain is formed that surrounds the exhaust that rises from the cooker.

  As shown in FIG. 8, this air curtain prevents exhaust gas containing oil smoke from diffusing into the kitchen, and effectively exhausts the exhaust gas by the sirocco fan 107. At this time, as shown in FIG. 8, the air before making the air curtain is also a laminar airflow that flows on the upper surface of the hood body. This prevents the contact of the upper surface of the hood main body 102 with dirt and prevents the dust and the like that are about to fall on the hood main body 102 from being removed.

International Publication No. 2004/051152

  In such a conventional range hood, an air curtain is used to cover the outer surface or the inner surface of the hood. However, even when the inner surface is covered, the contact of oil smoke with the inner surface cannot be reliably prevented, and the oil cannot be completely prevented from adhering to the hood. And the air curtain which blows off an inner surface in a cooker direction (downward direction) will face the direction opposite to oil smoke (upward direction) in a hood. For this reason, the entrained oil smoke is diffused downward, causing the entire cooking area to become dirty. In addition, it is a big problem in a kitchen where it is necessary to keep clean that dust accumulates on the outer surface of the hood when the fan is stopped and diffuses into the room during operation.

  Furthermore, since the air curtain is composed of the air supplied through the air supply duct, it is necessary to install the air supply duct separately from the exhaust duct and the main body, which is disadvantageous in terms of construction.

  Then, this invention solves the said conventional subject, and it aims at providing the range hood which improved cleaning property and workability.

  And the range hood which concerns on this invention is a range hood which consists of the hood functional part which collects air, and the exhaust part which exhausts the air collected by the said hood functional part, Comprising: The said exhaust part is oil smoke suction. A first air passage communicating with the mouth, an oil smoke exhaust port, the oil smoke suction port and the oil smoke exhaust port, a first impeller for guiding air from the oil smoke suction port to the oil smoke exhaust port, and the first A cylindrical main body having a first motor for driving the impeller, and the hood function section extends outwardly from the main body side end portion toward the oil smoke suction port with the side surface of the main body as the main body side end portion. A plurality of arm portions extending in a rod shape and the end portions on the main body side of the plurality of arm portions are connected to each other to form a polygonal collecting plane, and the oil smoke is formed from the inner wall surface of the polygon. A frame portion having an air outlet directed in the direction of the suction port; A plurality of virtual hood plates in which an inner portion and the frame portion constitute an end portion, and a flat surface inside the end portion is hollow, a suction port for sucking air, the main body side end portion, and the hollow arm portion inside And the hollow frame portion and the air outlet, the second air path spatially independent from the first air path, and the air inlet to the air outlet in the second air path A second impeller that guides air and a second motor that drives the second impeller are provided, thereby achieving the intended purpose.

  According to this invention, the area of the location used as cleaning object is small, and cleaning property can be improved. Moreover, since it is a simple intake structure, workability can be improved.

The perspective view of the range hood of Embodiment 1 of this invention Sectional drawing of the range hood of Embodiment 1 of this invention Sectional drawing of the range hood of Embodiment 1 of this invention Sectional drawing of the range hood of Embodiment 1 of this invention Sectional drawing of the range hood of Embodiment 2 of this invention The perspective view of the range hood of Embodiment 3 of this invention The perspective view of the range hood of Embodiment 3 of this invention Cross section of conventional range hood

  A range hood according to an embodiment of the present invention is a range hood including a hood function part that collects air and an exhaust part that exhausts air collected by the hood function part, and the exhaust part includes: An oil smoke suction port, an oil smoke exhaust port, a first air passage communicating the oil smoke suction port and the oil smoke exhaust port, a first impeller for guiding air from the oil smoke suction port to the oil smoke exhaust port, and A cylindrical main body having a first motor for driving the first impeller, and the hood function unit is provided with a side surface of the main body as an end on the main body side and from the main body side end toward the oil smoke inlet. A plurality of arm portions extending in the form of bars and connecting the opposite ends of the plurality of arm portions on the main body side constitutes a polygonal collecting plane, and is formed from the inner wall surface of the polygon. A frame part provided with a blower outlet directed toward the oil smoke inlet; and The frame portion and the frame portion constitute an end portion, and a plurality of virtual hood plates in which the plane inside the end portion is hollow, a suction port for sucking air, the main body side end portion, and the hollow arm A second air passage spatially independent from the first air passage, and the air outlet from the suction port in the second air passage. A second impeller that guides air to the outside and a second motor that drives the second impeller.

  Thereby, airflow is formed in the vicinity of the virtual hood plate by being blown out from the blowout port inside the frame to the oil smoke suction port by the air sucked into the second air passage from the suction port. The formed air flow guides the rising oil smoke to the oil smoke intake port, and the air and smoke that formed the air flow are both sucked from the oil smoke intake port to the first air passage and exhausted from the oil smoke exhaust port to the outside. The For this reason, there is no portion corresponding to a hood with a large burden at the time of cleaning, and the area to be cleaned is small, and the cleaning performance can be improved.

  Moreover, since airflow is formed by sucking in and blowing out indoor air, there is no need to install an air supply duct for taking in air from outside, and the workability can be improved.

  Also, the absence of the hood means that the shield on the user's head and in the field of view becomes smaller, that is, the user's feeling of pressure is lost. Furthermore, since the light in the room on the opposite side across the range hood comes out between the arm part and the frame part, there is an effect that the feeling of opening increases.

  In addition, air outside the virtual hood plate is also attracted by the air flow blown out from the air outlet, so that the oil smoke that has risen outside the frame without passing through the collection plane is also attracted by the air that has been attracted by the air And the collection / exhaust performance is improved.

  Moreover, the range hood which concerns on embodiment of this invention may be set as the structure where the said collection plane is located in the distance from the said smoke smoke inlet on the basis of the said main body. Thereby, since an air current is formed along the direction in which the oil smoke rises, it can be collected without disturbing the air current of the oil smoke. That is, the oil smoke is easily guided to the oil smoke suction port, and there is an effect that the oil smoke can be efficiently exhausted by suppressing leakage of the oil smoke into the room.

  Moreover, the range hood which concerns on embodiment of this invention says that the air which blows off from the blower outlet toward the said smoke smoke inlet direction from the said polygonal inner wall surface comprises an air curtain on the hollow plane of the said virtual hood board. It may be configured. As a result, the air curtain forms a wide air flow and blocks the air in the space between the inside and outside of the virtual hood plate. This prevents oil smoke from leaking outside the virtual hood plate, There is an effect that it can be guided to the suction port.

  The range hood according to an embodiment of the present invention includes the suction port on the side surface of the main body, the second impeller and the second motor in the main body, and the air sucked from the side surface of the main body is An air curtain may be configured. This eliminates the need for providing an air supply duct to supply air to form an air curtain, so that the main body configuration can be made compact and the size of the range hood can be reduced.

  Moreover, it is not necessary to install an air supply duct separately from the main body, and the workability is improved.

  Moreover, the range hood which concerns on embodiment of this invention may be set as the structure which provided the said suction inlet in the oil smoke exhaust outlet side rather than the said main body side edge part. Ascending oil smoke is collected inside the virtual hood plate and sucked into the oil smoke suction port, so it does not rise to the oil smoke exhaust port side from the end on the main body side, and air is sucked from the suction port Does not include oily smoke. For this reason, there exists an effect that it can prevent adhesion of the oil in a 2nd air path, and a blower outlet clogging with oil. And since the distance of an oil-smoke inlet and an inlet is away, an air current is not disturbed by the air sucked into an inlet. For this reason, it is possible to suppress the oily smoke from passing through the virtual hood plate and leaking indoors due to the turbulence of the air flow, and to efficiently exhaust the oil.

  In addition, the range hood according to the embodiment of the present invention may be configured such that both or one of the first motor and the second motor is provided in the second air passage.

  As a result, the motor in the second air passage can be cooled with air that does not contain oily smoke, so that it is possible to prevent the deterioration of the motor quality and failure due to oil and temperature rise.

  In the range hood according to the embodiment of the present invention, the first motor may serve as the second motor. Thereby, since two motors are driven by one motor, there is an effect that the cost of the range hood can be reduced.

  Moreover, since the space required for the arrangement of the motor is reduced, there is an effect that the air path can be enlarged or the main body size can be reduced.

  In addition, since the motor in the second air passage can be cooled with air that does not contain oil smoke, there is an effect that it is possible to prevent motor quality deterioration and failure due to oil or temperature rise.

  Moreover, the range hood which concerns on embodiment of this invention may make it the structure from which the angle of the air which blows off from an adjacent blower outlet differs with respect to the said collection plane. Thereby, the collision of the airflows which blow off from the adjacent blower outlet can be prevented, and the disturbance of the airflow inside the arm part and the frame part can be reduced. Thereby, there is an effect that oil smoke is prevented from leaking from the virtual hood plate to the outside, and the collection / exhaust performance is improved.

  In the range hood according to the embodiment of the present invention, the polygon is square, and only two air blown out from a pair of opposed outlets in the square are the oil smoke inlet and the collection plane. You may make it the structure which crosses in the space between. Thereby, the collision of the air which blows off from the adjacent blower outlet inside an arm part and a frame part can be prevented, ie, turbulence of an air current can be reduced. Also, in the vicinity of the boundary between the air blown out from the adjacent outlets, the air flow overlaps in the height direction, so that a double air flow is partially formed, so that oil smoke leaks from the virtual hood plate to the outside. It has the effect of preventing and improving the collection / exhaust performance.

  In the range hood according to the embodiment of the present invention, the polygon is a rectangle, and the angle of the air blown out from the long side air outlet in the rectangle is the air blown out from the short side air outlet. You may make it a structure larger than the said angle with respect to the said collection plane. Thereby, in the vicinity of the boundary between the air blown out from the adjacent outlets, the air flow overlaps in the height direction, so that a double air flow is partially formed, and oil smoke leaks from the virtual hood plate to the outside. Can be prevented. In addition, it is possible to prevent the air blown out from the long side frame portion, which is close to the oil smoke inlet, from colliding inside the arm portion and the frame portion. That is, since the turbulence of the air flow due to the collision between the blown airs is reduced, the oil smoke is prevented from leaking from the virtual hood plate to the outside, and the collection / exhaust performance is improved.

  Moreover, the airflow blown out from the frame portion is combined with the rising airflow of the oil smoke as it approaches the oil smoke suction port, and the angle with respect to the collection plane increases. On the other hand, by reducing the angle with respect to the collection plane of the air blown out from the short side frame portion, the air flow blown out from the long side frame portion was blown out from the short side frame portion. Can be located above the air.

  By the way, the air blown out from the frame part on the short side has a long reach distance to the oil smoke inlet. Therefore, it is easy to be influenced by the rising airflow, and tends to increase as the angle with respect to the collection plane approaches the oil smoke suction port. In other words, there is a possibility that the air current flows vertically upward in a place that does not reach the oil smoke inlet, that is, outside the range of the oil smoke inlet. However, even if the rising component becomes strong before reaching the oil smoke inlet, the air blown out from the long side frame part is located above, so the oil blown out from the long side frame part causes oil smoke It will be guided to the inlet. For this reason, there is an effect that the oil smoke is prevented from leaking indoors due to an excessively large angle of the airflow blown out from the frame portion on the short side, and the collection / exhaust performance is improved.

  Moreover, the range hood according to the embodiment of the present invention may have a configuration in which the wind speed of the air blown out from the adjacent outlet is different. Thereby, when the air blown out from the adjacent outlets collides, the airflow having a high wind speed becomes dominant, and the turbulence of the airflow due to the collision of the airflows inside the arm part and the frame part is reduced. Therefore, oil smoke is prevented from leaking from the virtual hood plate to the outside, and the collection / exhaust performance is improved.

  In the range hood according to the embodiment of the present invention, the polygon is rectangular, and the wind speed of the air blown from the long side air outlet is higher than the air speed of the air blown from the short side air outlet. A slow configuration may be used. Thereby, when the airflow from the frame part on the long side and the airflow from the frame part on the short side collide, the airflow from the frame part on the short side with a high wind speed becomes dominant. For this reason, the airflow can surely reach the oil smoke exhaust port. Moreover, the turbulence of the airflow due to the collision of the airflows blown out from the long-side frame portion having a short distance inside the arm portion and the frame portion is reduced. For this reason, oil smoke is prevented from leaking from the virtual hood plate to the outside, and there is an effect that the collection / exhaust performance is improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following embodiments are examples embodying the present invention, and do not limit the technical scope of the present invention. Moreover, the same code | symbol is attached | subjected about the same site | part through all the drawings. Furthermore, in each drawing, the description of the details of each part not directly related to the present invention is omitted.

(Embodiment 1)
FIG. 1 is a perspective view of a range hood according to the present embodiment.

  As shown in FIG. 1, the range hood 11 a includes an exhaust unit 12 and a hood function unit 13.

  The exhaust unit 12 includes a cylindrical main body 14, and includes a circular plane oil smoke suction port 15 on a lower surface thereof and a circular plane oil smoke exhaust port 16 on an upper surface thereof.

  The main body 14 includes a suction port 17 on a side surface and takes indoor air into the side wall 18, which will be described in detail later.

  The oil smoke suction port 15 constitutes an entrance to the exhaust unit 12 of oil smoke containing oil generated from a cooker (not shown) disposed below the range hood 11a, for example.

  The oil smoke exhaust port 16 is connected to an exhaust duct (not shown) communicating with the outdoors, and the air sucked from the oil smoke intake port 15 is exhausted to the outdoors. The mechanism will be described later.

  The hood function unit 13 includes a plurality of arm units 19 and a frame unit 20.

  The arm portion 19 is extended in a rod shape so as to spread outward from the main body side end portion 21 which is the side surface of the main body 14 in the direction of the oil smoke suction port 15 (downward in FIG. 1). The term "outward spread" here refers to the upper end points of the plurality of arm portions 19 extending downward, that is, the opposite end portions 22 that are lower end points than the polygon connecting the main body side end portions 21. The polygonal shape means a shape with a wide opening area.

  The main body side end portion 21 is disposed between the oil smoke suction port 15 and the oil smoke exhaust port 16 and on the oil smoke suction port 15 side. The suction port 17 is located closer to the oil smoke exhaust port 16 than the main body side end 21.

  The frame portion 20 forms a polygonal (substantially rectangular in this embodiment) collection plane 23 by connecting the end portions 22 opposite to the main body side end portions 21 of the plurality of arm portions 19.

  The collection plane 23 is configured as a polygonal plane located at the lower end of the range hood 11a and opening downward. The collection plane 23 has the same size (area) as the cooker in a plan view or a size larger than the cooker.

  A blower outlet 25 is provided on the polygonal inner wall surface 24 of the frame portion 20, that is, the inner wall surface 24 facing the collection plane 23.

  The air outlet 25 is provided as an opening from the inner wall surface 24 toward the oil smoke inlet 15, and is provided over the entire circumference of the collection plane 23. Here, the direction of the oil smoke suction port 15 is the circumferential end portion of the circular oil smoke suction port 15 and is the direction of the circumferential end portion closest to each air outlet 25. Moreover, although the blower outlet 25 is connected with the suction inlet 17, it mentions later for details.

  The arm portion 19 and the frame portion 20 constitute an end portion 26 having a substantially triangular shape, and a plurality of virtual hood plates 27 having a hollow inner surface from the end portion 26 are formed. That is, the virtual hood plate 27 is a hollow plane having a substantially triangular shape, and its end is in contact with the arm portion 19 and the frame portion 20.

  Subsequently, for the sake of understanding, the flow of wind in the range hood 11a will be described with reference to FIG. 2 prior to the description of the configuration of the exhaust unit 12 and the hood function unit 13. In addition, FIG. 2 is sectional drawing in the (a) plane of the range hood 11a which concerns on this Embodiment.

  In the range hood 11a according to the present invention, there are roughly two airflow flows. That is, the virtual hood airflow 30 generated by the hood function unit 13 and the exhaust airflow 50 exhausted outdoors via the exhaust unit 12 described above.

  The virtual hood airflow 30 is generated by sucking air existing in the indoor space from the suction port 17. As shown in FIG. 2, the suction port 17, the main body side end portion 21, the hollow arm portion 19, the hollow frame portion 20, and the air outlet 25 are communicated with the inside of the hood function portion 13. Thus, the second air passage 28 (one-dot broken line) is formed. The air sucked at the suction port 17 is pressurized by a second impeller 29 provided inside the second air passage 28. The pressurized air passes through the hollow arm portion 19 and the hollow frame portion 20, and is blown out from the air outlet 25. The air blown out from the blower outlet 25 forms a virtual hood airflow 30 on the hollow plane of the virtual hood plate 27 toward the oil smoke inlet 15 while attracting air around the blower outlet 25. The detailed configuration of the second air passage 28 in the main body 14 will be described later.

  The exhaust airflow 50 has oil smoke 31 generated from a cooker (not shown) disposed below the range hood 11a as a main component. The oil smoke 31 rises from below and passes through the collection plane 23. At this time, the oil smoke 31 is guided to the oil smoke inlet 15 along the flow of the virtual hood airflow 30.

  Further, part of the oil smoke 31 passes outside the frame portion 20. Since the virtual hood air flow 30 attracts ambient air, a part of the oil smoke 31 that has passed through the outside of the frame portion 20 is attracted to the virtual hood air current 30 and guided to the oil smoke inlet 15.

  The exhaust air 32 guided to the oil smoke inlet 15 (the rising oil smoke 31 + the air constituting the virtual hood airflow 30 blown out from the air outlet 25) enters the oil smoke inlet 15 by the suction of the first impeller 33. It is sucked in. The sucked exhaust air 32 passes through the first air passage 34 and is exhausted to the outside from an exhaust duct (not shown) via the oil smoke exhaust port 16. That is, the flow of the exhaust air 32 is the exhaust airflow 50. The first air passage 34 is an air passage in which the oil smoke suction port 15 and the oil smoke exhaust port 16 are communicated, and a more detailed configuration of the first air passage 34 in the main body 14 will be described later.

  Next, the first air path inside the main body 14 will be described in detail with reference to FIG. FIG. 3 is a cross-sectional view of the range hood 11a shown in FIG.

  The first air passage 34 (solid line arrow) includes a first impeller 33 and a first motor 35 that drives the first impeller 33 inside, and the wind that reaches the oil smoke exhaust port 16 starting from the oil smoke suction port 15. Road. Further, the first air passage 34 is configured between the second air passage wall surface 51 and the side wall 18 constituting the second air passage 28 so as to surround a part of the second air passage 28 (one-dot chain arrow). .

  The first impeller 33 is provided by communicating the first impeller suction port 36 that is the air suction port of the first impeller 33 on the upstream side of the exhaust airflow 50 and the oil smoke suction port 15. Further, on the downstream side of the exhaust airflow 50, a first impeller discharge port 37, which is an air discharge port of the first impeller 33, and the oil smoke exhaust port 16 are provided in communication.

  Next, the second air path inside the main body 14 will be described in detail with reference to FIG. 4 is a cross-sectional view of the range hood 11a shown in FIG. 1 at an angle (c) plane different from that in FIG.

  The second air passage 28 is an air passage that passes through the central portion of the main body 14 starting from the suction port 17 and reaches the air outlet 25 described above. The second air passage 28 drives the second impeller 29 and the second impeller 29. Two motors 38 are provided.

  The second impeller 29 is provided by communicating the second impeller suction port 39 that is the air suction port of the second impeller 29 on the upstream side of the virtual hood airflow 30 and the suction port 17. Further, on the downstream side of the virtual hood air flow 30, a second impeller discharge port 40 that is an air discharge port of the second impeller 29 and the inside of the arm portion 19 are provided in communication.

  A suction air passage 41 is provided from the suction port 17 to the second impeller suction port 39 so as to penetrate the first air passage 34.

  Since the suction ventilation path 41 is surrounded by a wall, the air passing through the suction ventilation path 41 and the air of the first ventilation path 34 do not intersect.

  A discharge air passage 42 is provided from the second impeller discharge port 40 to the inside of the arm portion 19 so as to penetrate the first air passage 34.

Since the discharge ventilation path 42 is surrounded by a wall, the air passing through the discharge ventilation path 42 and the air of the first air path 34 do not intersect.
As described above, as shown in FIGS. 3 and 4, the first air passage 34 and the second air passage 28 are spatially independent. “Spatially independent” as used herein refers to a state where there is no airflow crossing between the first air passage 34 and the second air passage 28. According to such a configuration, even if there is no conventional physical hood, the virtual hood plate 27 inside the end portion 26 and the virtual hood airflow 30 function to collect the oil smoke 31 in the same manner as the physical hood. Have. Since there is no physical hood, the surface to which oil, dust and the like adhere is small and the area to be cleaned is small, so that the cleaning property can be improved and the burden can be reduced.

  Moreover, since the virtual hood airflow 30 is formed by sucking and blowing indoor air, it is not necessary to install an air supply duct for taking in air from outside. Therefore, when installing the range hood 11a, man-hours can be reduced and workability can be improved.

  In addition, since there is no physical hood, the shield on the user's head and in the field of view becomes smaller. For this reason, the feeling of pressure given to a user can be reduced.

  Further, since the light from the front is not blocked by the physical hood, the light in the room on the opposite side across the range hood 11a passes through between the arm part 19 and the frame part 20 and reaches the user. Furthermore, the user can also see the front without being blocked by the physical hood. For this reason, a user's open feeling can be increased.

  Further, air outside the virtual hood plate 27 is also attracted toward the oil smoke suction port 15 by the virtual hood airflow 30 blown out from the outlet 25. For this reason, a part of the oil smoke 31 that has risen outside the frame portion 20 without passing through the collection plane 23 is guided to the oil smoke suction port 15 by the attracted air, thereby improving the collection / exhaust performance. it can. In other words, since the collection over a wide range is possible even if the collection plane 23 is reduced, the range hood can be downsized.

  Further, each outlet 25 is a circumferential end of the circular oil smoke inlet 15 and faces the circumferential end closest to each outlet 25. Thereby, the air curtain which covers the whole oil-smoke inlet 15 without omission can be comprised, and the collection performance can be improved.

  In the present embodiment, the collection plane 23 is located farther from the oil smoke inlet 15 with respect to the main body 14. According to such a configuration, the air blown from the blower outlet 25 forms an upward virtual hood air flow 30 toward the oil smoke suction port 15, and flows along the rising direction of the oil smoke 31. For this reason, it becomes easy to guide the oil smoke 31 to the oil smoke intake port 15 without disturbing the rising air current of the oil smoke 31. By suppressing the occurrence of the turbulence of the air current, the amount of the oil smoke 31 leaking indoors due to the turbulence can be suppressed and the exhaust can be efficiently performed.

  Further, in the present embodiment, the air blown out from the air outlet 25 toward the oil smoke inlet 15 from the polygonal inner wall surface 24 forms an air curtain on the hollow plane of the virtual hood plate 27. Here, the air curtain is to prevent air in a space sandwiching the air curtain from being mixed by forming a film of airflow. According to such a configuration, the air curtain blocks the air traffic in the space inside and outside the virtual hood plate 27. For this reason, it can suppress that the oil smoke 31 passes the virtual hood board 27, and leaks indoors, can be guide | induced to the oil smoke suction inlet 15, and can improve collection and exhaust_gas | exhaustion performance.

  Further, in the present embodiment, the suction port 17 is provided on the side surface of the main body, the second impeller 29 and the second motor 38 are provided in the main body 14, and the air sucked from the suction port 17 is blown out from the outlet 25. Make up the curtain. According to such a configuration, in order to form the air curtain, it is not necessary to provide a casing or an air passage including the second impeller 29 and the second motor 38 separately from the main body 14. For this reason, the structure of the hood function part 13 can be put together compactly, and the size of the range hood 11a can be made small.

  In the present embodiment, the suction port 17 is provided closer to the oil smoke exhaust port 16 than the main body side end portion 21. According to such a configuration, the rising oil smoke 31 is collected inside the virtual hood plate 27 and sucked into the oil smoke suction port 15, so that it is closer to the oil smoke exhaust port 16 than the main body side end portion 21. Oil smoke 31 does not rise. For this reason, the air sucked into the suction port 17 is air that does not contain the oil smoke 31. Since the oil smoke 31 is not sucked into the second air passage 28, it is possible to prevent oil from adhering to the second air passage 28 and clogging of the outlet 25 with oil. Further, the second motor 38 provided in the second air passage 28 is cooled by the wind in the second air passage 28, but the motor does not come into contact with the oil smoke. Quality degradation and failure can be prevented. Further, since the distance between the oil smoke suction port 15 and the suction port 17 is long, the virtual hood airflow 30 is not disturbed by the air sucked into the suction port 17. For this reason, the amount of the oil smoke 31 that passes through the virtual hood plate 27 due to the turbulence of the virtual hood airflow 30 and leaks indoors can be suppressed, and exhausted efficiently.

(Embodiment 2)
In the second embodiment, only differences from the first embodiment will be described. FIG. 5 is a cross-sectional view of the main body of the range hood 11b according to the second embodiment.

  As shown in FIG. 5, the structure of each air passage (first air passage 34, second air passage 28) of the main body 14 of the range hood 11b is the same as that of the range hood 11a in the first embodiment.

  The difference from the range hood 11a is that the first motor 35b also serves as the second motor 38, and both the first impeller 33 and the second impeller 29 are driven only by the first motor 35b.

  The first motor 35 b includes coaxial rotation shafts 52 on both sides, and a first impeller 33 is provided on one of the rotation shafts 52 and a second impeller 29 is provided on the other.

  Further, the first motor 35 b that also serves as the second motor 38 is provided in the second air passage 28.

  According to such a configuration, since the two impellers can be driven only by the first motor 35b, the cost can be reduced. Further, the space required for providing the motor is reduced. For this reason, the 1st air path 34 and the 2nd air path 28 can be expanded, and it becomes possible to reduce the pressure loss of an air path. In addition, you may make a main body size small, without expanding an air path.

(Embodiment 3)
In the third embodiment, only differences from the first and second embodiments will be described. FIG. 6 is a perspective view of the range hood according to the third embodiment.

  As shown in FIG. 6, the structure of the hood function unit 13, the exhaust unit 12, and each air passage (first air passage 34, second air passage 28) of the range hood 11 c is the same as the range hood 11 a of the first embodiment. It is. Is the same.

  The difference from the range hood 11a is that the angle of the air blown out from the air outlet 25 with respect to the collection plane 23 is different between the adjacent air outlets 25a and 25b.

  In Embodiment 3, the polygon of the collection plane 23 which the frame part 20 comprises is a rectangle. The angle of the air (virtual hood airflow 30) blown out from the rectangular long side air outlet 25b with respect to the collection plane 23 is larger than the angle of the air (virtual hood airflow 30) blown out from the short side air outlet 25a. Is also big. Further, two airs blown out from the short side air outlet 25 a intersect in the space between the oil smoke inlet 15 and the collection plane 23.

  According to such a configuration, it is possible to prevent a collision between the virtual hood airflow 30a and the virtual hood airflow 30b blown from the adjacent air outlets 25a and 25b. Moreover, it can prevent that the virtual hood airflow 30b which opposes collides by enlarging the blowing angle from the blower outlet 25b of the long side where the distance between the air outlets 25 which oppose is near. For this reason, the disturbance which arises by the collision between virtual hood airflow 30 can be reduced, the quantity of the oil smoke 31 which leaks indoors by disturbance can be reduced, and it can exhaust efficiently.

  Moreover, the virtual hood airflow 30a, 30b overlaps in the height direction, whereby a double virtual hood airflow 30 is formed. For this reason, it is possible to prevent oil smoke from leaking from the virtual hood plate 27 to the outside and improve the collection / exhaust performance.

  In addition, the virtual hood airflow 30a from the short side has a long reach to the oil smoke inlet 15. For this reason, the closer to the oil smoke suction port 15, the higher the angle of the oil smoke 31 with the rising air flow and the greater the angle with respect to the collection plane 23, and there is a possibility that the oil smoke suction port 15 will not be reached. In the above configuration, the virtual hood airflow 30b from the long side is positioned above the virtual hood airflow 30a from the short side. For this reason, even when the rising component of the virtual hood air flow 30a becomes strong, the oil smoke suction port 15 is guided by the virtual hood air flow 30b located above. Thereby, it can suppress that the oil smoke 31 leaks indoors because the angle of the virtual food | hood airflow 30a from a short side becomes large too much, and can improve collection and exhaust_gas | exhaustion performance.

  When the polygon is a square, only two air (virtual hood airflow 30) blown out from a pair of opposed outlets 25 in the square are in the space between the oil smoke inlet 15 and the collection plane 23. You may make it the structure which crosses. In such a configuration, there is no difference in function and effect.

  The wind speed of the air blown from the long side air outlet 25b may be slower than the air speed of the air blown from the short side air outlet 25a. Any method can be used to change the wind speed. For example, the wind speed can be changed by changing the opening width of each outlet 25.

  According to such a configuration, when the virtual hood airflow 30b from the long-side air outlet 25b and the virtual hood airflow 30a from the short-side air outlet 25a collide, the short-side air outlet 25a having a high wind speed. The virtual hood airflow 30a from becomes dominant. For this reason, it is possible to prevent the virtual hood airflow 30 from being greatly disturbed and to reach the oil smoke inlet 15 with certainty. Furthermore, the virtual hood airflows 30b can be prevented from colliding with each other by slowing the wind speed of the blowout port 25b on the long side where the distance between the blower ports 25 is short. For this reason, the oil smoke 31 can be prevented from leaking from the virtual hood plate 27 to the outside, and the collection / exhaust performance can be improved.

  In the present embodiment, the collection plane 23 constituted by the frame portion 20 is rectangular, but the collection plane 23 constituted by the frame portion 20a is polygonal as shown in the range hood 11d of FIG. (Hexagon) may be sufficient. In the configuration of FIG. 7, the angle of the air blown out from each outlet 25 of the adjacent virtual hood plate 27 is different from the collection plane 23. Moreover, the wind speed of the air which blows off from the adjacent virtual food board 27 is also different. In such a configuration, there is no difference in function and effect.

(Other variations)
You may comprise the said Embodiment 1-3 in combination in the range which does not contradict. The polygon may be a triangle or more unless otherwise specified. Even in the case of a triangle, the angles of three adjacent air outlets can be set differently.

  However, when the configuration (angle) of the opposing virtual hood airflow is limited, it is needless to say that the polygon is necessarily a quadrangle or more and an even number of angles.

  The range hood according to the present invention forms a virtual hood using an air curtain instead of a physical hood that collects oily smoke and the like, and can improve cleanability, reduce a feeling of pressure, and the like. Since it is a thing, it is useful as various ventilation apparatuses etc. which are used for residential use or industrial use.

11a, 11b, 11c, 11d Range hood 12 Exhaust part 13 Hood function part 14 Main body 15 Oil smoke intake port 16 Oil smoke exhaust port 17 Suction port 18 Side wall 19 Arm part 20, 20a Frame part 21 Main body side end part 22 Reverse end part 23 Collection plane 24 Inner wall surface 25, 25a, 25b Outlet 26 End 27 Virtual hood plate 28 Second air passage 29 Second impeller 30, 30a, 30b Virtual hood airflow 31 Oil smoke 32 Exhaust air 33 First impeller 34 First Air passages 35, 35b First motor 36 First impeller suction port 37 First impeller discharge port 38 Second motor 39 Second impeller suction port 40 Second impeller discharge port 41 Suction air passage 42 Discharge air passage 50 Exhaust air Airflow 51 Second air passage wall surface 52 Rotating shaft 101 Supply / exhaust type range hood 102 Hood body 103 Exhaust duct 104 First compartment box 105 Suction port 106 Discharge 107 sirocco fan 108 second partitioning box 109 air supply duct 110 air supply port 111 discharge port 112 the air supply fan 113 drive motor 114 partitioned tube 115 separator 116 supply passage

Claims (12)

A range hood comprising a hood function part for collecting air and an exhaust part for exhausting air collected by the hood function part,
The exhaust part is
An oil smoke suction port, an oil smoke exhaust port, a first air passage communicating the oil smoke suction port and the oil smoke exhaust port, a first impeller for guiding air from the oil smoke suction port to the oil smoke exhaust port, and A cylindrical main body having a first motor for driving the first impeller;
The hood function unit is
A plurality of arm portions extending in a rod shape so as to spread outwardly from the main body side end portion in the direction of the oil smoke suction port with the side surface of the main body as the main body side end portion
A frame including a plurality of arm portions opposite to the main body side end portions to form a polygonal collecting plane, and a blowout port directed from the inner wall surface of the polygon toward the oil smoke suction port. And
The arm portion and the frame portion constitute an end portion, and a plurality of virtual hood plates in which the plane inside the end portion is hollow,
A second wind that is communicated with the air inlet, the end on the main body side, the inside of the hollow arm, the hollow frame, and the outlet, and is spatially independent from the first air passage. Road,
A range hood comprising: a second impeller that guides air from the suction port to the outlet through the second air passage; and a second motor that drives the second impeller. The range hood according to claim 1, wherein the collection plane is located farther from the oil smoke suction port with respect to the main body. The range hood according to claim 1 or 2, wherein air blown out from a blower outlet directed toward the oil smoke suction port from the polygonal inner wall surface forms an air curtain on a hollow plane of the virtual hood plate. The suction port is provided on the side of the main body,
The second impeller and the second motor are provided in the main body,
The range hood according to claim 3, wherein air sucked from a side surface of the main body constitutes the air curtain. The range hood according to any one of claims 1 to 4, wherein the suction port is provided closer to the oil smoke exhaust port than the main body side end. The range hood according to any one of claims 1 to 5, wherein both or one of the first motor and the second motor is provided in the second air passage. The range hood according to any one of claims 1 to 5, wherein the first motor also serves as the second motor. The range hood according to any one of claims 1 to 7, wherein an angle of air blown from an adjacent outlet is different with respect to the collection plane. The polygon is a square;
Only two air blown out from a pair of opposed outlets in the square,
The range hood according to any one of claims 1 to 8, wherein the range hood intersects in a space between the oil smoke inlet and the collection plane. The polygon is a rectangle;
The angle of the air which blows off from the long side air outlet in the said rectangle is larger than the angle of the air which blows off from the short side air outlet, The any one of Claim 1 to 8 Range hood according to item. The range hood of any one of Claim 1 to 10 from which the wind speed of the air blown off from an adjacent blower outlet differs. The polygon is a rectangle;
The range hood according to any one of claims 1 to 11, wherein a wind speed of air blown from the long side air outlet is slower than a wind speed of air blown from the short side air outlet.

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