WO2022104987A1 - 一种导烟板及应用有该导烟板的吸油烟机 - Google Patents

一种导烟板及应用有该导烟板的吸油烟机 Download PDF

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Publication number
WO2022104987A1
WO2022104987A1 PCT/CN2020/137043 CN2020137043W WO2022104987A1 WO 2022104987 A1 WO2022104987 A1 WO 2022104987A1 CN 2020137043 W CN2020137043 W CN 2020137043W WO 2022104987 A1 WO2022104987 A1 WO 2022104987A1
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Prior art keywords
guide plate
smoke guide
range hood
air inlet
smoke
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PCT/CN2020/137043
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English (en)
French (fr)
Inventor
苟文波
徐志能
雷改
史磊
葛路
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宁波方太厨具有限公司
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Publication of WO2022104987A1 publication Critical patent/WO2022104987A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/20—Removing cooking fumes

Definitions

  • the invention relates to the technical field of oil fume guide devices, in particular to a smoke guide plate and a range hood applied with the smoke guide plate.
  • Range hoods have become one of the indispensable kitchen appliances in modern homes.
  • the range hood uses the principle of fluid dynamics to work.
  • the centrifugal fan installed inside the range hood sucks and discharges the oil fume, and uses the filter screen to filter some grease particles.
  • the centrifugal fan includes a volute, an impeller installed in the volute, and a motor that drives the impeller to rotate. When the impeller rotates, a negative pressure suction is generated in the center of the fan, and the oil fume under the range hood is sucked into the fan. After being accelerated by the fan, it is collected by the volute and guided out of the room.
  • range hoods include top suction and side suction.
  • Top suction range hoods are more and more widely used due to their neatness, lightness and small footprint.
  • the top suction range hood usually includes a fume collecting hood, a fan casing located on the fume collecting hood, and a volute, an impeller and a motor for driving the impeller are installed in the fan casing.
  • Patent CN101701726A (application number 200910193448.9) discloses a range hood, including a smoke guide plate, a smoke collecting hood, a rectifying net and a box body, wherein the smoke collecting hood is provided with an air inlet, and the smoke guide plate is facing the air inlet.
  • a fan system is arranged in the box above the smoke collecting hood, and is kept at a predetermined distance from the smoke collecting hood.
  • the smoke guide plate is a flat plate, and the flat plate structure has a relatively smooth surface, and the Coanda effect is weakened, so that the oil fume easily flows away from the flat surface to form a channeling flow, and the oil fume absorption effect is reduced. At the same time, the channeling oil fumes interfere with each other, which is easy to generate noise.
  • Chinese patent CN104180413A (application number 201410419676.4) discloses a top-suction range hood with a smoke guide plate.
  • the lower surface of the smoke guide plate is wavy, and the roughness of the lower surface of the smoke guide plate is increased. To a certain extent, the Coanda effect is enhanced.
  • due to the existence of a large number of grooves on the lower surface of the smoke guide plate, with a depth of 0.5mm to 10mm when the oil fume bypasses the groove, it is easy to form a large number of local vortices, which disturb the surrounding flow field and increase the noise.
  • the existence of grooves can easily cause oil fume to condense on the surface to form oil droplets, which is difficult to clean. The condensed oil droplets will drip into the pot, resulting in unsanitary food.
  • the applicant's Chinese patent CN103697511A (application No. 201310627395.3) discloses a diffuser and drainage device with a middle height and an included angle between the surrounding side plates and the middle plane, which solves the problem of oil fume escape from the front end of the range hood to a certain extent.
  • the problem Due to the obvious sharp-angle structure (transition structure of straight edge-circular arc-straight edge, arc R ⁇ 30) at the front end of the smoke guide plate (diffuser and drainage device), the airflow is diffused when it flows through it.
  • the first technical problem to be solved by the present invention is to provide a smoke guide plate in view of the above-mentioned deficiencies in the prior art, which can reduce the structure that hinders the airflow and improve the flow conditions.
  • the second technical problem to be solved by the present invention is to provide a range hood using the above-mentioned smoke guide plate.
  • a smoke guide plate comprising a central plate located in the middle and a side plate located on the outer periphery of the central plate, so that the smoke guide plate as a whole is gradually convex from the edge to the middle It is characterized in that at least one edge of the whole of the smoke guide plate is arc-shaped, and the arc-shaped edge has a smooth transition with other edges of the adjacent smoke guide plate.
  • the outer edge of the side plate is bent to form a flange, and the bending direction of the flange is consistent with the bulge direction of the smoke guide plate.
  • the bulge height of the smoke guide plate is h, and h is greater than the height of the flange and less than 5 times the height of the flange.
  • the technical solution adopted by the present invention to solve the above-mentioned second technical problem is: a range hood applying the above-mentioned smoke guide plate, which is characterized in that the smoke guide plate is arc-shaped at least at the front end.
  • the smoke guide plate is gradually inclined downward from front to back, and a strip-shaped oil cup is arranged on the rear side of the smoke guide plate, and the oil cup and the smoke guide plate are integrally formed. or split settings.
  • the range hood includes a range hood body, an air inlet is opened on the range hood body, and the smoke guide plate is arranged below the air inlet.
  • a trumpet-shaped annular acceleration channel is formed between the air inlet and the air inlet.
  • the smoke guide plate is connected to the body of the range hood through a connector.
  • the other two sets of connecting pieces are arranged on the rear side of the smoke guide plate.
  • one set of connecting pieces is arranged at the center corresponding to the air inlet, and the other two sets of connecting pieces are arranged behind the air inlet and spaced from left to right. layout.
  • a filter screen is provided at the air inlet, and the connecting piece corresponding to the center of the air inlet can be detachably connected to the filter screen.
  • the smoke guide plate has two spaced left and right.
  • the present invention has the advantages that: the circular arc design of the smoke guide plate can reduce the structure that hinders the flow of air and improve the flow conditions of the subsequent air inlets; It can prevent oil fume from escaping from the front end; the overall convex structure of the smoke guide plate forms an annular acceleration channel together with the body of the range hood, which has a stronger oil fume absorption effect, and is not easy for grease to condense, which is convenient for cleaning and oil collection.
  • the triangular fixing method based on the principle of triangular stability, the circular arc structure design of the front end and the triangular fixing method based on the principle of triangular stability reduce the disturbance of the flow field, which can effectively improve the flow conditions of the air inlet, prevent the oil smoke from escaping from the front end, and also prevent the fumes from escaping from the front end.
  • the smoke guide plate is detachable and connected, which is easy to disassemble and clean;
  • the distributed smoke guide plate forms a public negative pressure area in the middle of the smoke collecting cavity, which is used for guiding, Accommodating and collecting the oily fumes that cannot be discharged in time is more conducive to the use of binocular stoves and multi-eye stoves.
  • Fig. 1 is the schematic diagram of the first embodiment of the range hood of the present invention
  • Fig. 2 is the schematic diagram of the first embodiment of the range hood of the present invention (the smoke guide plate is opened);
  • FIG. 3 is a side view of the first embodiment of the smoke guide plate of the present invention.
  • FIG. 4 is a schematic structural diagram of Embodiment 1 of the smoke guide plate of the present invention.
  • FIG. 5 is a schematic diagram of a range hood of the present invention after the smoke guide plate is hidden;
  • Fig. 6 is the working state simulation schematic diagram of the smoke guide plate Embodiment 1 of the present invention.
  • Fig. 7 is the working state simulation schematic diagram of the first embodiment of the range hood of the present invention (looking up);
  • FIG. 8 is a schematic diagram (front view) of a working state simulation of a range hood according to Embodiment 1 of the present invention.
  • Fig. 9 is the working state simulation schematic diagram (side view) of the first embodiment of the range hood of the present invention.
  • Embodiment 2 is a schematic structural diagram of Embodiment 2 of the smoke guide plate of the present invention.
  • FIG. 11 is a schematic structural diagram of Embodiment 3 of the smoke guide plate of the present invention.
  • Embodiment 4 of the smoke guide plate of the present invention
  • FIG. 13 is a schematic structural diagram of Embodiment 5 of the smoke guide plate of the present invention.
  • the range hood is a thin (horizontal) range hood, including a box body 1, an oil guide plate 2, and an oil guide plate. 2 below the smoke guide plate 3.
  • the box body 1 is provided with a parallel double fan system, and the oil guide plate 2 is provided with an air inlet 21.
  • the oil guide plate 2 is connected with the box body 1 and the fan system through screws.
  • the smoke collecting cavity 22 Alternatively, the range hood may also be a common top-suction range hood.
  • the box body 1 , the oil guide plate 2 and the fan system constitute the main body of the range hood.
  • each smoke guide plate 3 is disposed facing one of the air inlets 21 to form a distributed arrangement.
  • the rear end of the smoke guide plate 3 is provided with a bar-shaped oil cup 31 , and the smoke guide plate 3 is gradually inclined downward from front to back, thereby allowing the grease accumulated on the upper surface of the smoke guide plate 3 to flow into the oil cup 31 .
  • the smoke guide plate 3 and the oil cup 31 are integrally formed, and the rear end of the smoke guide plate 3 is inclined backward and gradually downward to form the front side wall of the oil cup 31 .
  • the oil cup 31 can be formed by stretching the plate.
  • the range hood of this embodiment adopts the first embodiment of the smoke guide plate, referring to FIG. 3 and FIG. 4 , the smoke guide plate 3 gradually protrudes upward from the edge to the middle to form an overall inner convex structure.
  • the outer periphery of the smoke guide plate 3 is connected to the air inlet A trumpet-shaped annular acceleration channel 32 is formed between 21 .
  • the smoke guide plate 3 is integrally formed by stretching, including a central plate 33 located in the middle and side plates 34 located at the outer periphery of the central plate 33, wherein the central plate 33 is a flat plate, and its outline is the same as the smoke guide plate 33.
  • the overall outer contour of the plate 3 is the same, and the central plate 33 is obtained by reducing the entire smoke guide plate 3 in a certain proportion.
  • the golden ratio is used for proportional scaling.
  • the raised height of the central plate 33 ie the raised height of the smoke guide plate 3
  • h is the vertical distance between the central plate 33 and the plane where the outer edges of the side plates 34 are located.
  • ⁇ is an acute angle less than 20°, and the value of ⁇ ranges from 7.5° to 10.5°.
  • h and ⁇ will affect the flow field distribution and flow rate around the smoke guide plate 3, thereby affecting the effect of oil fume absorption.
  • h is determined when the size of the smoke guide plate 3 is determined, so that the oil fume passes through get better acceleration.
  • the trumpet-shaped annular acceleration channel 32 formed by the smoke guide plate 3 and the air inlet 21 enables the oil fume to flow more smoothly, reducing the mutual interference between the oil smoke and the generation of vortices on the inner surface of the smoke guide plate 3 . Further, the probability of generating aerodynamic noise due to air flow interaction is reduced, which plays the role of rectifying oil fume and improving the inflow conditions of the air inlet.
  • the annular acceleration channel 32 due to the existence of the annular acceleration channel 32, the negative pressure area originally concentrated near the air inlet 21 is diffused to the outer periphery of the smoke guide plate 3, thereby expanding the smoke collecting range.
  • the distributed smoke guide plates 3 will form two annular acceleration channels in the lower part of the box 1, and form a public negative pressure area in the middle of the smoke collecting chamber 22 for guiding, accommodating and collecting the fume that cannot be discharged in time. , which is more conducive to the use of binocular stoves and multi-eye stoves.
  • the overall front end of the smoke guide plate 3 is in the shape of a circular arc protruding forward to avoid sharp corners or the traditional "straight edge-circular arc (arc radius ⁇ 30, that is, arc chamfering in the usual sense)-straight edge. ” transition, in order to reduce the interference of the corners to the airflow, guide the airflow to pass through the annular acceleration channel 32 more smoothly, reduce the formation of local vortices, and prevent the influence of the deterioration of the flow conditions from the air inlet on the actual fume suction effect, see Figure 6. Further, in order to facilitate processing and manufacturing, the circular arc structure is designed using the standard curve equation of a circle.
  • the arcs of the two sides of the smoke guide plate 3 and the front end 3a smoothly transition, and the overall shape is like a trapezoid, with a narrow front and a wide rear, and the arc radius R ⁇ 90mm.
  • the arc can be formed by splicing the edges of at least two side plates 34 .
  • the outer edge of the side plate 34 is bent upward to form a flange 35 .
  • the existence of the flange 35 enables the upper surface of the smoke guide plate 3 to form a space capable of storing grease, so as to prevent the grease from dripping from the edge of the smoke guide plate 3 .
  • h is less than 5 times the height of the flange 35 and not less than the height of the flange 35 , more preferably, h is 2 times the height of the flange 35 . Therefore, after passing through the flanging 35 , the oil fume can be better accelerated along the side plate 34 and enter the fan system, so as to avoid the formation of a vortex on the upper surface of the smoke guide plate 3 .
  • the smoke guide plate 3 is connected and fixed with the oil guide plate 2 through the connecting piece 4 .
  • the smoke guide plate 3 is connected to the oil guide plate 2 in a triangular fixed manner, and a group of connecting pieces 4 are located in the middle of the smoke guide plate 3 (the middle part is not here). It is strictly required to be located in the center of the smoke guide plate 3, but not close to the edge), and the two sets of connectors 4 are located at the position near the rear side of the smoke guide plate 3.
  • one set of the connecting members 4 are the claws 41 and the buckles 42
  • the other two sets of the connecting members 4 are the hooks 43 and the hook bases 44 .
  • the clamping combination of the clamping claw 41 and the buckle 42 is located on the front side
  • the hooking combination of the hook 43 and the hook base 43 is located at the rear side.
  • the air inlet 21 of the oil guide plate 2 is provided with a filter screen 23, the buckle 42 is arranged on the filter screen 23, preferably, such as the center of the filter screen 23, and the clamping claw 41 is arranged in the middle of the upper surface of the smoke guide plate 3 and is located in the middle of the upper surface of the smoke guide plate 3.
  • this area belongs to the center of the air inlet 21, with less air flow and low flow velocity.
  • the arrangement of the connector 4 here has little effect on the air flow, and it is not easy to form a Karman vortex street and disturb the flow field. Referring to Fig. 7, the air flow of oil fume is concentrated around the air inlet 21, and the middle is less; referring to Fig. 8 and Fig.
  • the claws 41 can be fixed to the smoke guide plate 3 by screws. Further, the relative positions of the two groups of connectors 4 on the rear side are determined based on the principle of triangular stability.
  • the hook bases 44 are arranged at intervals, and the hook bases 44 are located behind the air inlets 21 . Each hook 43 can be fixed with the smoke guide plate 3 by screws.
  • the three connecting pieces 4 can form an isosceles triangle or an equilateral triangle.
  • the specific matching structure of the claw 41 and the buckle 42, and the matching structure of the hook 43 and the hook seat 44 can all use the prior art, such as the applicant's patent mentioned in the background art.
  • the original four connecting pieces that affect the flow conditions of the air inlet are reduced to two (two sets of connecting pieces 4 on the rear side), and since the claws 41 are located directly under the filter screen 23, they belong to the air inlet 21 In the central area, there is less airflow and lower flow velocity, non-airflow must pass through, and the disturbance to the flow field is small, which avoids the impact on the performance of the range hood to a certain extent, and improves the range hood. To reduce the overall noise level.
  • the fan system When the range hood is working, the fan system is started, and a local negative pressure area is formed at the air inlet 21 of the oil guide plate 2, and the oil fume is drawn upwards.
  • the lower wall surface of the smoke guide plate 3 flows evenly.
  • the oil fume When passing through the horn-shaped annular acceleration channel 32 formed by the smoke guide plate 3 and the air inlet 21 of the oil guide plate, the oil fume is guided to accelerate and flow along the upper surface of the smoke guide plate 3, and the negative pressure area is diffused to the entire upper surface of the smoke guide plate 3 and the upper surface of the smoke guide plate 3. edge, which greatly improves the pressure distribution in the lower part of the range hood.
  • the circular arc structure design at the front end of the smoke guide plate 3 and the triangular fixing method based on the principle of triangular stability effectively reduce unnecessary structures that hinder the flow of oil fume, prevent oil fume from escaping from the front end, and reduce the disturbance to the flow field. It is beneficial to reduce the noise level of the whole machine.
  • connection method of clamping and hooking makes it easy to remove the smoke guide plate 3, and the overall internal convex (upward convex) structure is not easy to condense oil stains, which is convenient for users to clean.
  • the distributed smoke guide plates 3 can effectively utilize the common negative pressure area between the two guide plates to guide, accommodate and collect oil fume from the central area of the smoke collecting cavity 22 into the annular acceleration channel 32, thereby improving the oil fume suction efficiency.
  • the smoke guide plate of the embodiment differs from the first embodiment of the smoke guide plate in that the arc shape of the front end 3a ′ of the smoke guide plate 3 is a semicircle, and the semicircle consists of a semicircular side plate 34 'get.
  • the smoke guide plate of the embodiment is different from the above-mentioned second embodiment in that the front end 3a'' and the rear end 3b'' of the smoke guide plate 3 are designed with semicircular structures, and the central plate 33'' is an oval shape Small side plates 34c" are respectively set on the left and right sides between the front and rear semicircular side plates 34" to form a transition section, which further eliminates the influence of the corners on the flow field.
  • the difference between the smoke guide plate of the embodiment and the above-mentioned third embodiment is that the smoke guide plate 3 is circular as a whole, and the central plate 33 ′′′ is a circular flat plate, and only one is circular
  • the annular side plate 34''' surrounds the outer circumference of the central plate 33''', and the transition section between the front and the rear is omitted.
  • the oil cup 31 and the smoke guide plate 3 are provided separately.
  • the smoke guide plate of the embodiment is different from the above-mentioned fourth embodiment in that the smoke guide plate 3 also has a small side plate 34c"' on the rear side of the annular side plate 34"'.
  • the plate 34c''' is parallel to the central plate 33''', that is, the small side plate 34c''' is not inclined, and the oil cup 31 is integrally formed at the rear end of the small side plate 34c'''34.

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Abstract

一种导烟板（3），包括位于中间的中央板(33)和围绕在中央板(33)外周的一圈侧板(34)，其中，侧板(34)由边缘向中间倾斜向上，导烟板（3）整体的至少一段边缘(34a)呈圆弧形，并且圆弧形的边缘(34a)与相邻的导烟板（3）其他边缘(34b)光滑过渡。还公开了一种应用有上述导烟板（3）的吸油烟机。与现有技术相比，导烟板（3）的圆弧形设计，能够减少阻碍气流流动，改善后续进风口（21）的来流条件；导烟板（3）至少在前端（3a）呈圆弧形，能够防止油烟从前端（3a）逃逸。

Description

一种导烟板及应用有该导烟板的吸油烟机 技术领域
本发明涉及油烟导流装置的技术领域，尤其是一种导烟板以及应用有该导烟板的吸油烟机。
背景技术
吸油烟机已成为现代家庭中不可或缺的厨房家电设备之一。吸油烟机是利用流体动力学原理进行工作，通过安装在吸油烟机内部的离心式风机吸排油烟，并使用滤网过滤部分油脂颗粒。离心式风机包括蜗壳、安装在蜗壳中叶轮及带动叶轮转动的电机。当叶轮转动时，在风机中心产生负压吸力，将吸油烟机下方的油烟吸入风机，经过风机加速后被蜗壳收集、引导排出室外。
通常吸油烟机包括顶吸式和侧吸式，顶吸式的吸油烟机由于整洁轻巧、占用空间小等优点，而有着越来越广泛的应用。顶吸式吸油烟机通常包括集烟罩、位于集烟罩上的风机外壳，风机外壳内安装有蜗壳、叶轮以及驱动叶轮的电机。
为解决传统顶吸式吸油烟机负压集中的问题，在进风口正下方设置导烟板结构，引导负压区域向周边扩散，利用附壁效应引导油烟均匀流动，避免油烟窜流，如中国专利CN101701726A(申请号为200910193448.9)公开的一种吸油烟机，包括有导烟板、集烟罩、整流网和箱体，其中集烟罩上设有进风口，导烟板正对该进风口设置，且与集烟罩保持有预定的间距，集烟罩上方的箱体内设置有风机系统。但其导烟板为一块平板，平板结构由于其表面较为光滑，附壁效应减弱，油烟容易脱离平板表面流动形成窜流，吸油烟效果下降。同时，窜流油烟相互干扰，容易产生噪音。
基于此，中国专利CN104180413A(申请号为201410419676.4)公开了一种带导烟板的顶吸式吸油烟机，其导烟板下表面呈波浪状，加大了导烟板下表面粗糙度，一定程度上增强了附壁效应。但由于导烟板下表面存在数量较多，深0.5mm至10mm的沟槽，油烟在绕过沟槽时极易形成数量众多的局部旋涡，扰乱周围流场，噪音也随之增加。且沟槽的存在极易使油烟在其表面凝结形成油滴，难以清洁，凝结的油滴会滴落至锅内，导致食物不卫生。
此外，本申请人的中国专利CN103697511A(申请号为201310627395.3)公开了一种具有中间高，四周侧板与中部平面均具有夹角的扩压引流装置，在一定程度上解决了油烟机前端油烟逃逸的问题。由于该导烟板(扩压引流装置)前端明显类尖角结构(直边-圆弧-直边的过渡结构，圆弧R≤30)的存在，致使气流在流经此处时呈扩散状向周围流动，容易在导烟板内表面形成窜流，且窜流经过加速通道加速后能量增强，并最终在中部平 面相互作用形成两个范围较大、能量较强的局部旋涡，恶化了进风口来流条件，影响实际吸油烟效果；此外，导烟板采用四个卡扣的固定方式，而气流在流经卡扣时容易形成卡门涡街，扰乱进风口流场，进而影响实际吸油烟效果。
现有的这些具有导烟板的吸油烟机，在增加导烟板后，导致整体噪音水平偏高，也就是说，目前具有导烟板的吸油烟机虽在一定程度上扩大了负压区，改善了吸油烟效果，但增加导烟板后吸油烟机的整体噪音水平偏高，影响用户体验。
发明内容
本发明所要解决的第一个技术问题是针对上述现有技术存在的不足，提供一种导烟板，减少阻碍气流流动的结构，改善来流条件。
本发明所要解决的第二个技术问题是提供一种应用有上述导烟板的吸油烟机。
本发明解决上述第一个技术问题所采用的技术方案为：一种导烟板，包括位于中间的中央板和位于与中央板外周的侧板，使得导烟板整体呈由边缘向中间逐渐凸起的形状，其特征在于：所述导烟板整体的至少一段边缘呈圆弧形，并且圆弧形的边缘与相邻的导烟板其他边缘光滑过渡。
为使得油烟在经过导烟板时更好地加速，所述中央板与侧板之间具有夹角α，α为小于20°的锐角。
为避免油脂从导烟板的边缘滴落，所述侧板的外边缘弯折而形成有翻边，翻边的弯折方向与导烟板的凸起方向一致。
为使得油烟在经过导烟板时更好地加速，避免形成漩涡，所述导烟板的凸起高度为h，h大于翻边的高度并且小于翻边高度的5倍。
本发明解决上述第二个技术问题所采用的技术方案为：一种应用有如上所述的导烟板的吸油烟机，其特征在于：所述导烟板至少在前端呈圆弧形。
为便于收集导烟板上的油脂，所述导烟板由前向后逐渐向下倾斜，所述导烟板的后侧设置有条状的油杯，所述油杯与导烟板一体成型或分体设置。
为便于油烟加速进入吸油烟机本体内，所述吸油烟机包括吸油烟机本体，所述吸油烟机本体上开设有进风口，所述导烟板设置在进风口下方，所述导烟板和进风口之间形成喇叭状的环形加速通道。
为避免导烟板的安装结构对气流造成扰动，所述导烟板通过连接件与吸油烟机本体连接，所述连接件具有三组，三组连接件呈三角形分布，其中一组连接件设置在导烟板的中间，另外两组连接件设置在导烟板的后侧。
优选的，为进一步减小对气流的影响，避免形成卡门涡街而扰乱流场，其中一组连接件设置在与进风口中心对应处，另外两组连接件设置在进风口的后方并且左右间隔布置。
为便于安装连接件，所述进风口处设置有滤网，与进风口中心对应的连接件能够与滤网可拆卸连接。
为便于引导、容纳和收集未能及时排走的油烟，更加适应双眼灶或多眼灶，所述导烟板具有左右间隔布置的两个。
与现有技术相比，本发明的优点在于：导烟板的圆弧形设计，能够减少阻碍气流流动的结构，改善后续进风口的来流条件；导烟板至少在前端呈圆弧形，能够防止油烟从前端逃逸；导烟板的整体内凸结构，与吸油烟机本体共同形成环形加速通道，吸油烟效果更强，而且不易于油脂凝结，便于清洁和油脂的收集；连接件利用基于三角形稳定性原理的三角固定方式，前端圆弧形结构设计与基于三角形稳定性原理的三角固定方式，减少对流场的扰动，可有效改善进风口来流条件，防止油烟从前端逃逸，同时也阻断了噪音源的形成，有益于降低整机噪音水平；导烟板可拆卸连接，便于拆卸进行清洗；分布式布置的导烟板在集烟腔中部形成公共负压区，用于引导、容纳和收集未能及时排走的油烟，更加有利于双眼灶和多眼灶用户的使用。
附图说明
图1为本发明吸油烟机实施例一的示意图；
图2为本发明吸油烟机实施例一的示意图(导烟板打开)；
图3为本发明的导烟板实施例一的侧视图；
图4为本发明的导烟板实施例一的结构示意图；
图5为本发明吸油烟机实施例一隐藏导烟板后的示意图；
图6为本发明的导烟板实施例一的工作状态仿真示意图；
图7为本发明吸油烟机实施例一的工作状态仿真示意图(仰视)；
图8为本发明吸油烟机实施例一的工作状态仿真示意图(正视)；
图9为本发明吸油烟机实施例一的工作状态仿真示意图(侧视)；
图10为本发明的导烟板实施例二的结构示意图；
图11为本发明的导烟板实施例三的结构示意图；
图12为本发明的导烟板实施例四的结构示意图；
图13为本发明的导烟板实施例五的结构示意图。
具体实施方式
下面详细描述本发明的实施例，所述实施例的示例在附图中示出，其中相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。
在本发明的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽 度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，由于本发明所公开的实施例可以按照不同的方向设置，所以这些表示方向的术语只是作为说明而不应视作为限制，比如“上”、“下”并不一定被限定为与重力方向相反或一致的方向。此外，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。
吸油烟机实施例一
参见图1、图2和图5，为本发明吸油烟机的实施例一，该吸油烟机为薄型(卧式)吸油烟机，包括箱体1、导油板2和设置在导油板2下方的导烟板3。其中箱体1内设有并联双风机系统，导油板2上开设有进风口21，导油板2通过螺钉与箱体1、风机系统连接，在导油板2正下方形成有预定高度的集烟腔22。可替代的，吸油烟机也可以为普通的顶吸式吸油烟机。上述箱体1、导油板2和风机系统构成吸油烟机本体。
进风口21具有左右间隔布置的两个，导烟板3也具有两个并且位于进风口21的下方，每个导烟板3正对其中一个进风口21设置形成分布式布置。导烟板3的后端设置有条形的油杯31，导烟板3由前向后逐渐向下倾斜，由此可使得导烟板3上表面累积的油脂流入到油杯31内。在本实施例中，导烟板3和油杯31一体成型，导烟板3的后端向后并逐渐向下倾斜构成油杯31的前侧壁。油杯31可通过板件拉伸的方式形成。
本实施例的吸油烟机采用导烟板实施例一，参见图3和图4，该导烟板3由边缘向中间逐渐向上凸起，形成整体内凸结构，导烟板3外周与进风口21之间形成喇叭状环形加速通道32。
在本实施例中，导烟板3整体通过拉伸的方式一体成型，包括位于中间的中央板33和位于中央板33外周的侧板34，其中，中央板33为平板，其轮廓与导烟板3整体的外轮廓一致，中央板33由导烟板3整体按一定比例缩小而得到，优选的，采用黄金分割比进行等比缩放。中央板33凸起的高度(即导烟板3的凸起高度)为h，该高度h即为中央板33与各侧板34的外边缘所在平面之间的垂直距离。中央板33与侧板34之间具有夹角α，α为小于20°的锐角，α的取值范围为7.5°～10.5°。h和α会影响导烟板3周边的流场分布和流速，进而影响吸油烟效果，通过设置上述的α取值范围，由此在导烟板3尺寸确定时h确定，使得油烟在经过时获得较好地加速。
由此，导烟板3与进风口21共同组成的喇叭状的环形加速通道32，使得油烟能够更加顺畅的流动，减少了油烟之间的相互干扰以及导烟板3内表面旋涡的生成。进一步地，减小了因气流相互作用产生气动噪音的机率，起到整流油烟、改善进风口入流条件的作用。同时，由于环形加速通道32的存在，使原本集中于进风口21附近的负压区向导烟板3外周扩散，扩大了拢烟范围。且分布式布置的导烟板3，会在箱体1下部形成 两个环形加速通道，并在集烟腔22中部形成公共负压区，用于引导、容纳和收集未能及时排走的油烟，更加有利于双眼灶和多眼灶用户的使用。
导烟板3整体前端呈向前突出的圆弧形，避免角部出现尖角或传统的“直边-圆弧(圆弧半径≤30，即通常意义上的圆弧倒角)-直边”过渡，以减少角部对气流的干扰，引导气流更加顺畅的通过环形加速通道32，减少局部旋涡的形成，防止进风口来流条件恶化对实际吸油烟效果的影响，参见图6。进一步地，为方便加工制造，圆弧形结构采用圆的标准曲线方程进行设计。进一步地，导烟板3两侧与前端3a的圆弧光滑过渡，整体呈类梯形状，前窄后宽，圆弧半径R≥90mm。圆弧可由至少两个侧板34的边缘拼接而成。
侧板34的外边缘向上弯折而形成有翻边35，翻边35的存在使得导烟板3上表面形成能够存储油脂的空间，以避免油脂从导烟板3边缘滴落。优选的，h小于翻边35高度的5倍，并且不小于翻边35高度，更为优选的，h为翻边35高度的2倍。由此使得油烟经过翻边35后能更好地沿着侧板34加速进入风机系统，避免在导烟板3上表面形成漩涡。
导烟板3通过连接件4与导油板2连接固定。为进一步减少不必要结构对进风口21来流条件的影响，导烟板3采用三角固定的方式与导油板2连接，其中一组连接件4位于导烟板3的中间(此处中间不严格要求位于导烟板3的中心，但不能靠近边缘)，两组连接件4位于导烟板3靠近后侧的位置。在本实施例中，其中一组连接件4为卡爪41和卡扣42，另外两组连接件4均为挂钩43和挂钩座44。其中，卡爪41和卡扣42的卡接组合位于前侧，挂钩43和挂钩座43的挂接组合位于后侧。
导油板2的进风口21处设置有滤网23，卡扣42设置在滤网23上，优选的，如滤网23的中心，而卡爪41设置在导烟板3上表面中间并且位于滤网23中心的正下方，此区域属于进风口21中心，气流少、流速低，在此处布置连接件4对气流影响较小，不易形成卡门涡街，扰乱流场。参见图7，油烟气流集中于进风口21周边一圈，中部较少；参见图8和图9，进风口21左右两侧、前后两侧气流集中，且流速较快，进风口21中部气流少，流速较慢。卡爪41可通过螺钉与导烟板3固定。进一步地，基于三角形稳定性原理确定后侧两组连接件4的相对位置，两个挂钩43布置在导烟板3上表面后侧，并且位于油杯31前侧的位置，两个挂钩43左右间隔布置，挂钩座44位于进风口21的后方。每个挂钩43可通过螺钉与导烟板3固定。三个连接件4可构成等腰三角形或等边三角形。
具体的卡爪41和卡扣42的配合结构，挂钩43和挂钩座44的配合结构，均可采用现有技术，如背景技术中提到的本申请人的专利。
相较于传统采用四组连接件连接的导烟板，参见图7～图9可知，四组连接件均处于气流流动的必经之路，气流流经连接件时，易在其后形成卡门涡街，干扰气流流动，影 响进风口来流条件，且易形成局部噪音源。尤其当连接件尺寸较大时，更容易产生干扰。在本发明中，通过将原来影响进风口来流条件的四个连接件缩减为两个(后侧的两组连接件4)，且由于卡爪41位于滤网23正下方，属于进风口21中部区域，气流较少，流速较低，非气流必经之路，对流场扰动较小，一定程度上避免了对吸油烟机性能产生的影响，改善了吸油烟机的吸油烟效果，有益于降低整机噪音水平。
吸油烟机工作时，风机系统启动，在导油板2的进风口21处形成局部负压区，抽吸油烟向上运动，油烟上升过程中在导烟板3下表面形成附壁效应，油烟沿导烟板3下壁面均匀流动。经过导烟板3与导油板进风口21形成的喇叭状环形加速通道32时，引导油烟沿导烟板3的上表面加速流动，将负压区域扩散到整个导烟板3的上表面与边缘，极大地改善了吸油烟机下部的压力分布。导烟板3前端圆弧形结构设计以及基于三角形稳定性原理的三角固定方式，有效减少了阻碍油烟流动的不必要结构，防止油烟从前端逃逸，减小了对流场的扰动，进一步地，有益于降低整机噪音水平。
同时，卡接和挂接的连接方式，很容易将导烟板3拆下，整体内凸(向上凸)的结构也不易于凝结油渍，方便用户清洗。此外，分布式布置的导烟板3可以有效利用两导流板间的公共负压区域，引导、容纳、收集油烟从集烟腔22中部区域进入环形加速通道32，提高吸油烟效率。
导烟板实施例二
参见图10，实施例的导烟板，与上述导烟板实施例一的不同之处在于，导烟板3前端3a’的圆弧形为半圆，该半圆由一个半圆形的侧板34’得到。
导烟板实施例三
参见图11，实施例的导烟板，与上述实施例二的不同之处在于，导烟板3前端3a”与后端3b”均采用半圆形结构设计，中央板33”为一呈椭圆形的平板，前后两个半圆形的侧板34”之间左右两侧分别另设小侧板34c”构成过渡段，进一步消除了角部对流场的影响。油杯31与导烟板3分体设置。
导烟板实施例四
参见图12，实施例的导烟板，与上述实施例三的不同之处在于，导烟板3整体呈圆形，中央板33”’为一呈圆形的平板，此时只有一个呈圆环状的侧板34”’，环绕在中央板33”’的外周，而省略了前部与后部之间的过渡段。油杯31与导烟板3分体设置。
导烟板实施例五
参见图13，实施例的导烟板，与上述实施例四的不同之处在于，导烟板3还具有在 圆环状侧板34”’后侧的小侧板34c”’，该小侧板34c”’与中央板33”’平行，即小侧板34c”’不倾斜，油杯31一体成型在该小侧板34c”’34的后端。
另外，导烟板3的外形结构、固定方式、分布方式均存在多种类型，但只要符合整体内凸、前端圆弧形结构设计、分布式布置以及基于三角形稳定性原理的三角固定方式等即可。

Claims (11)

  1. 一种导烟板，包括位于中间的中央板(33)和围绕在中央板(33)外周的一圈侧板(34)，其中，侧板(34)由边缘向中间倾斜向上，其特征在于：所述导烟板整体的至少一段边缘(34a)呈圆弧形，并且圆弧形的边缘(34a)与相邻的导烟板其他边缘(34b)光滑过渡。
  2. 根据权利要求1所述的导烟板，其特征在于：所述中央板(33)与侧板(34)之间具有夹角α，α为小于20°的锐角。
  3. 根据权利要求1所述的导烟板，其特征在于：所述侧板(34)的外边缘向上弯折而形成有翻边(35)。
  4. 根据权利要求3所述的导烟板，其特征在于：所述侧板(34)的倾斜高度为h，h大于翻边(35)的高度并且小于翻边(35)高度的5倍。
  5. 一种应用有如权利要求1～4中任一项所述的导烟板的吸油烟机，其特征在于：所述导烟板(3)至少在前端(3a)呈圆弧形。
  6. 根据权利要求5所述的吸油烟机，其特征在于：所述导烟板(3)由前向后逐渐向下倾斜，所述导烟板(3)的后侧设置有条状的油杯(31)，所述油杯(31)与导烟板(3)一体成型或分体设置。
  7. 根据权利要求5所述的吸油烟机，其特征在于：所述吸油烟机包括吸油烟机本体，所述吸油烟机本体上开设有进风口(21)，所述导烟板(3)设置在进风口(21)下方，所述导烟板(3)和进风口(21)之间形成喇叭状的环形加速通道(32)。
  8. 根据权利要求7所述的吸油烟机，其特征在于：所述导烟板(3)通过连接件(4)与吸油烟机本体连接，所述连接件(4)具有三组，三组连接件(4)呈三角形分布，其中一组连接件(4)设置在导烟板(3)的中间，另外两组连接件设置在导烟板(3)的后侧。
  9. 根据权利要求8所述的吸油烟机，其特征在于：其中一组连接件(4)设置在与进风口(21)中心对应处，另外两组连接件(4)设置在进风口(21)的后方并且左右间隔布置。
  10. 根据权利要求9所述的吸油烟机，其特征在于：所述进风口(21)处设置有滤网(23)，与进风口(21)中心对应的连接件(4)能够与滤网(23)可拆卸连接。
  11. 根据权利要求7～10中任一项所述的吸油烟机，其特征在于：所述导烟板(3)具有左右间隔布置的两个。
PCT/CN2020/137043 2020-11-17 2020-12-17 一种导烟板及应用有该导烟板的吸油烟机 WO2022104987A1 (zh)

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