A range hood with a flow guide component

Abstract

The present invention belongs to the technical field of kitchen appliances, and discloses an oil fume extractor with a flow guide member, which includes a wind guide plate assembly and a flow guide member. The wind guide plate assembly is connected to the smoke collecting hood, and the wind guide plate assembly corresponds to the air inlet hole; the flow guide member is connected to the wind guide plate assembly or the smoke collecting hood. Along the direction of oil fume flow, an air inlet end and an air outlet end are respectively arranged at both ends of the flow guide member. The air outlet end corresponds to the air inlet, and there is a first air inlet area between the air inlet end and the wind guide plate assembly. The first air inlet area communicates with the air inlet through the inner cavity of the flow guide member to form a first flow guide channel. There is a second air inlet area between the air inlet end and the panel. The second air inlet area communicates with the air inlet through the outside of the flow guide member to form a second flow guide channel. For the oil fume extractor with a flow guide member of the present invention, the flow guide member can conduct layered flow guidance on the flowing oil fume, avoid the formation of a turbulent area caused by circumferential air inlet of the oil fume, and reduce the pneumatic noise; at the same time, improve the fluidity of the oil fume, avoid the escape of oil fume caused by poor air inlet, and improve the effective smoking rate.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and particularly to an oil fume extractor with a flow guiding member. Background Art

[0002] The side suction type oil fume extractor has multiple advantages such as the installation position not affecting the cooking operation space, the air inlet being closer to the cooking stove, and the lower risk of oil dripping, and has a certain market share in the oil fume extractor industry. The side suction type oil fume extractor has various different appearance structures. Among them, in one type of side suction type oil fume extractor, an outward protruding external wind guiding plate is installed in the middle of the panel of the smoke collecting hood, and the panel area corresponding to the wind guiding plate has air holes communicating with the fan system. The cavity formed by the wind guiding plate and the panel is used to achieve the effect of sucking oil fume circumferentially around the wind guiding plate; this kind of wind guiding plate is generally circular or oval, and has the advantages of beautiful shape and simple structure.

[0003] However, for the side suction type oil fume extractor of the above-mentioned structural type, since the air inlet is circumferential from the periphery of the wind guiding plate to the air holes of the panel, a strong turbulent flow area is formed due to the circumferential intersection of the air flow between the wind guiding plate and the air inlet channel of the fan system. It is not only easy to cause poor air inlet and oil fume escape, but also easy to generate pneumatic noise, affecting the customer use experience.

[0004] Therefore, there is an urgent need for an oil fume extractor with a flow guiding member to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an oil fume extractor with a flow guiding member, which can achieve stratified flow guiding for the air inlet between the wind guiding plate and the fan assembly, reduce oil fume escape, and prevent the generation of pneumatic noise.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] An oil fume extractor with a flow guiding member includes a smoke collecting hood and a fan assembly arranged in the smoke collecting hood. The smoke collecting hood includes a panel provided with a smoke inlet hole, and the fan assembly is provided with an air inlet, and the air inlet is correspondingly communicated with the smoke inlet hole. The oil fume extractor further includes:

[0008] A wind guiding plate assembly, connected to the smoke collecting hood, and the wind guiding plate assembly corresponds to the smoke inlet hole;

[0009] A flow guiding member, connected to the wind guiding plate assembly or the smoke collecting hood. Along the oil fume flow direction, the two ends of the flow guiding member are respectively provided with an air inlet end and an air outlet end, the air outlet end corresponds to the air inlet, a first air inlet area is formed between the air inlet end and the wind guiding plate assembly, and the first air inlet area is communicated with the air inlet through the inner cavity of the flow guiding member to form a first flow guiding channel. A second air inlet area is formed between the air inlet end and the panel, and the second air inlet area is communicated with the air inlet through the outside of the flow guiding member to form a second flow guiding channel.

[0010] As a preferred structure of the present invention, the flow guide member is in a horn shape, and the cross-sectional area of the air inlet end is larger than that of the air outlet end, and there is a smooth transition surface between the air inlet end and the air outlet end.

[0011] As a preferred structure of the present invention, the radius of curvature of the smooth transition surface at the air inlet end is larger than that at the air outlet end.

[0012] As a preferred structure of the present invention, a space ring curve is provided at the top of the air inlet end, and a first air inlet area is formed between the space ring curve and the air guide plate assembly, and a second air inlet area is formed between the space ring curve and the panel.

[0013] As a preferred structure of the present invention, a planar ring curve is provided at the top of the air outlet end, and the planar ring curve is perpendicular to the axis of the air inlet, and the ratio of the cross-sectional area of the air outlet end to the cross-sectional area of the air inlet is positively correlated with the area of the first air inlet area.

[0014] As a preferred structure of the present invention, the projection distance between the space ring curve and the air guide plate assembly has a changing trend. Along the positive height direction of the air guide plate assembly, the changing trend is from small to large or from large to small.

[0015] As a preferred structure of the present invention, when the changing trend is from small to large, the area of the first air inlet area is smaller than that of the second air inlet area; when the changing trend is from large to small, the area of the first air inlet area is larger than that of the second air inlet area.

[0016] As a preferred structure of the present invention, the projection of the space ring curve on the air guide plate assembly is located inside the boundary of the air guide plate assembly.

[0017] As a preferred structure of the present invention, the air guide plate assembly includes:

[0018] Front panel;

[0019] Air guide vanes, the air guide vanes are connected to the front panel, the air guide vanes include a ridge-shaped air guide portion, the air guide portion can be accommodated in the first air guide channel, and the height direction of the air guide portion extends along the oil fume flow direction.

[0020] As a preferred structure of the present invention, the ridge line of the air guide portion extends along the height direction of the air guide plate assembly.

[0021] As a preferred structure of the present invention, the smoke collecting hood further comprises a plurality of first connecting members arranged on the panel, the air guide plate assembly comprises a plurality of second connecting members, and the first connecting members are detachably connected to the second connecting members.

[0022] As a preferred structure of the present invention, the smoke collecting hood further comprises a mounting frame disposed on the panel, and the mounting frame is configured to support the air guide plate assembly.

[0023] As a preferred structure of the present invention, the air guide plate assembly further includes a plurality of third connecting members, a plurality of fourth connecting members are arranged on the air guide member, and the third connecting members are detachably connected to the fourth connecting members.

[0024] As a preferred structure of the present invention, the air guide plate assembly also includes a metal support plate, which is connected to a side of the front panel close to the air guide member, and the second connecting member and the third connecting member are both fixedly arranged on the metal support plate.

[0025] As a preferred structure of the present invention, the projection of the spatial annular curve on the panel is a partial circular curve or a petal-shaped curve, and the concave portion of the petal-shaped curve forms an avoidance space.

[0026] As a preferred structure of the present invention, when the projection of the spatial annular curve on the panel is a partial circular curve, the guide member is provided with an avoidance hole.

[0027] Beneficial effects of the present invention:

[0028] The range hood with a guide provided by the present invention has a guide installed on the rear side of the guide plate assembly. After the smoke bypasses the guide plate assembly, part of the smoke enters the inner cavity of the guide from the first air inlet area and enters the air inlet along the first guide channel, and part of the smoke enters the outside of the guide from the second air inlet area and enters the air inlet along the second guide channel. The guide can guide the flowing smoke in layers to avoid a strong turbulent area caused by the circumferential air intake after the smoke passes through the guide plate assembly, reduce aerodynamic noise, and improve the customer experience; at the same time, it improves the fluidity of the smoke, avoids the escape of the smoke due to poor air intake, and improves the effective smoking rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a structural front view of a range hood with a flow guide provided by an embodiment of the present invention;

[0030] Figure 2 is a structural schematic diagram of a smoke hood and a fan assembly provided in an embodiment of the present invention;

[0031] Figure 3 The structure side view of the range hood with a guide member provided by an embodiment of the present inventionFigure 1 ;

[0032] Figure 4 is a structural cross-sectional view of an oil fume extractor with a flow guide provided by an embodiment of the present invention;

[0033] Figure 5 is a schematic structural view of the flow guide provided by an embodiment of the present invention;

[0034] Figure 6 is a side view of the structure of the oil fume extractor with a flow guide provided by an embodiment of the present invention Figure 2 ;

[0035] Figure 7 is a schematic structural view of the air deflector assembly provided by an embodiment of the present invention Figure 1 ;

[0036] Figure 8 is a schematic structural view of the air deflector assembly provided by an embodiment of the present invention Figure 2 ;

[0037] Figure 9 is a schematic structural view of the smoke collecting hood and the flow guide provided by an embodiment of the present invention Figure 1 ;

[0038] Figure 10 is a schematic structural view of the smoke collecting hood and the flow guide provided by an embodiment of the present invention Figure 2 ;

[0039] Figure 11 is a schematic structural view of the oil fume extractor with a flow guide provided by Embodiment 1 of the present invention;

[0040] Figure 12 is a schematic structural view of the oil fume extractor with a flow guide provided by Embodiment 2 of the present invention.

[0041] In the figure:

[0042] 1. Smoke collecting hood; 11. Panel; 12. First connecting member; 13. Mounting bracket;

[0043] 2. Fan assembly; 21. Air inlet;

[0044] 3. Air deflector assembly; 31. Front panel; 32. Deflecting vane; 321. Deflecting portion; 33. Second connecting member; 34. Metal support plate;

[0045] 4. Flow guide; 41. Air inlet end; 411. First air inlet area; 412. Second air inlet area; 413. Spatially circular curve; 42. Air outlet end; 421. Planar circular curve; 43. Avoidance hole;

[0046] 5. Oil cup. Detailed implementation manners

[0047] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the convenience of description, only the parts related to the present invention rather than all the structures are shown in the drawings.

[0048] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above the top", and "on the top" of the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below the bottom", and "under the bottom" of the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0050] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left", and "right" are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.

[0051] The side suction range hood has a variety of different appearance structures. Among them, in one side suction range hood, a protruding external air guide plate is installed in the middle of the panel of the smoke collecting hood. The panel area corresponding to the air guide plate has air holes communicating with the fan system, and the effect of circumferential oil fume suction around the air guide plate is achieved through the cavity formed by the air guide plate and the panel. Since the air inlet from the air guide plate to the air holes on the panel is circumferential, a strong turbulent flow area is formed due to the circumferential intersection between the air flow in the air guide plate and the air inlet channel of the fan system. Poor air inlet will cause oil fume to escape, affecting the oil fume suction efficiency, and also easily generating aerodynamic noise, affecting the customer experience.

[0052] To solve the above problems, as Figure 1 andFigure 2 As shown in the figure, an embodiment of the present invention provides a range hood with a flow guide member. The range hood with a flow guide member includes a smoke collecting hood 1 and a fan assembly 2 disposed in the smoke collecting hood 1. The fan assembly 2 is connected in the smoke collecting hood 1 by connection means such as threaded connection, welding or riveting. The smoke collecting hood 1 includes a panel 11 provided with a smoke inlet hole. The air inlet 21 of the fan assembly 2 is correspondingly communicated with the smoke inlet hole. Under the action of the fan assembly, the cooking fume enters the air inlet channel of the fan assembly 2 from the air inlet 21 and then is discharged from the range hood. Both the fan assembly 2 and the panel 11 are inclined to form side suction. The smoke inlet hole on the panel 11 can be approximately circular or approximately elliptical. A grease cup 5 is connected below the smoke collecting hood 1 to collect the dripping grease in the smoke collecting hood 1.

[0053] The range hood with a flow guide member according to an embodiment of the present invention further includes a wind guide plate assembly 3 and a flow guide member 4, as Figure 3 and Figure 4 shown; the wind guide plate assembly 3 is connected to the smoke collecting hood 1, and the wind guide plate assembly 3 corresponds to the smoke inlet hole; preferably, the area of the wind guide plate assembly 3 is larger than the area of the smoke inlet hole, which is not only more beautiful in appearance, but also can effectively guide the cooking fume entering the air inlet 21. The flow guide member 4 is connected to the wind guide plate assembly 3 or the smoke collecting hood 1. Along the flow direction of the cooking fume, an air inlet end 41 and an air outlet end 42 are respectively provided at both ends of the flow guide member 4. The air outlet end 42 corresponds to the air inlet 21. A first air inlet area 411 is formed between the air inlet end 41 and the wind guide plate assembly 3. The first air inlet area 411 is communicated with the air inlet 21 through the inner cavity of the flow guide member 4 to form a first flow guide channel; a second air inlet area 412 is formed between the air inlet end 41 and the panel 11. The second air inlet area 412 is communicated with the air inlet 21 through the outside of the flow guide member 4 to form a second flow guide channel. After the cooking fume bypasses the wind guide plate assembly 3, part of the cooking fume enters the inner cavity of the flow guide member 4 from the first air inlet area 411 and enters the air inlet 21 along the first flow guide channel, and part of the cooking fume enters the outside of the flow guide member 4 from the second air inlet area 412 and enters the air inlet 21 along the second flow guide channel, as Figure 3 indicated by the arrows in the figure. The flow guide member 4 can conduct layered guidance on the flowing cooking fume, avoid strong turbulent regions caused by circumferential air inlet after the cooking fume passes through the wind guide plate assembly 3, reduce the aerodynamic noise, and improve the customer experience; at the same time, it improves the fluidity of the cooking fume, avoids the escape of the cooking fume due to poor air inlet, and improves the effective smoke absorption rate.

[0054] As a preferred solution, the flow guide member 4 is in a horn shape, as Figure 5As shown, the cross-sectional area of the air inlet end 41 is larger than that of the air outlet end 42, that is, the air inlet end 41 is the large end of a horn shape, and the air outlet end 42 is the small end of a horn shape, reducing the escape of oil fume; there is a smooth transition surface between the air inlet end 41 and the air outlet end 42. A section is formed along the axial direction of the flow guide member 4, and the two flow-through curves of any section are smooth and guiding curves. More specifically, the radius of curvature of the smooth transition surface at the air inlet end 41 is larger than that at the air outlet end 42, which means that the smooth transition surface is closer to a planar shape at the air inlet end 41 and closer to an arc surface at the air outlet end 42. The nearly planar air inlet end 41 is easy to guide the oil fume that bypasses the air guide plate assembly 3 and is perpendicular to the axial direction of the air inlet passage 2, and adjusts the flow direction of the oil fume to be parallel to the axial direction of the air inlet passage 2 at the arc-shaped air outlet end 42, so that the flow directions of the oil fume in the first flow guide channel and the second flow guide channel can be rectified simultaneously, inhibiting the separation of the flow boundary layer, reducing the flow mixing of the oil fume, and further reducing the flow resistance of the oil fume in the first flow guide channel and the second flow guide channel, reducing the unevenness of the oil fume flow, and further reducing the aerodynamic noise.

[0055] As a preferred solution, a space annular curve 413 is provided at the top end of the air inlet end 41, as Figure 5 shown; a first air inlet area 411 is formed between the space annular curve 413 and the air guide plate assembly 3, and a second air inlet area 412 is formed between the space annular curve 413 and the panel 11. The total area of the first air inlet area 411 and the second air inlet area 412 is related to the distance between the air guide plate assembly 3 and the panel 11. Due to the spatial characteristics of the space annular curve 413, the projection distance from each point on the space annular curve 413 to the air guide plate assembly 3 is variable, that is, the shapes of the first air inlet area 411 and the second air inlet area 412 are variable: when the distance between the air guide plate assembly 3 and the panel 11 is fixed, if the first air inlet area 411 increases, the second air inlet area 412 will decrease accordingly; conversely, if the first air inlet area 411 decreases, the second air inlet area 412 will increase accordingly. This change can correspondingly adjust and distribute the oil fume inhalation amounts of the first air inlet area 411 and the second air inlet area 412 to meet the needs of different oil fume amounts at different spatial positions above the cooker, and further alleviate the problem of easy escape of oil fume existing in the existing side suction range hood, and improve the effective smoking rate.

[0056] As a preferred solution, a planar annular curve 421 is provided at the top end of the air outlet end 42, as Figure 5As shown; and the planar annular curve 421 is perpendicular to the axis of the air inlet 21, that is, the plane where the planar annular curve 421 is located is parallel to the port of the air inlet 21, so that the oil fume in the first diversion channel and the second diversion channel can enter the air inlet 21 at a uniform speed. In the embodiment of the present invention, the distance between the plane where the cross-sectional area of the air outlet end 42 is located (that is, the plane where the planar annular curve 421 is located) and the air inlet 21 is 15 mm - 30 mm, and this distance range enables the fan assembly 2 to effectively suck the oil fume in the first diversion channel and the second diversion channel.

[0057] The ratio of the cross-sectional area of the air outlet end 42 to the cross-sectional area of the air inlet 21 is positively correlated with the area of the first air inlet region 411. That is, when the area of the first air inlet region 411 increases, correspondingly, the oil fume flow rate passing through the first diversion channel also increases. At this time, it is necessary to increase the cross-sectional area of the air outlet end 42, so as to realize the air volume distribution and meet the air volume requirement for the inhaled oil fume volume. It can be understood that the air outlet end 42 corresponds to the first air inlet region 411, and the space of the air inlet 21 other than the air outlet end 42 corresponds to the second air inlet region 412. When adjusting the areas of the first air inlet region 411 and the second air inlet region 412, the ratio of the cross-sectional area of the air outlet end 42 to the cross-sectional area of the air inlet 21 is adjusted accordingly, so that the air volume generated by the fan assembly 2 can be proportionally and evenly distributed to the first air inlet region 411 and the second air inlet region 412, and the air volume is adjusted and distributed once to achieve the effect of multi-dimensional and three-dimensional air distribution of the diversion member 4, so that the air intake volume of the first diversion channel and the second diversion channel matches the inhaled oil fume volume.

[0058] As a preferred solution, the projection distance between the space annular curve 413 and the air deflector assembly 3 has a changing trend. Along the positive direction of the height of the air deflector assembly 3, the changing trend is from small to large or from large to small. When the projection distance between the space annular curve 413 and the air deflector assembly 3 is 0, it means that the space annular curve 413 abuts against the air deflector assembly 3. At this position, the oil fume cannot pass through the first air inlet region 411 and can pass through the second air inlet region 412; when the projection distance between the space annular curve 413 and the air deflector assembly 3 increases until it abuts against the panel 11, at this position, the oil fume can pass through the first air inlet region 411 and cannot pass through the second air inlet region 412. Therefore, the changing trend of the space annular curve 413 reflects the orientations of the first air inlet region 411 and the second air inlet region 412. When the projection distance between the space annular curve 413 and the air deflector assembly 3 changes from large to small, it means that the inlet end of the first diversion channel corresponds to the lower region of the air deflector assembly 3, such as Figure 3As shown, the inlet end of the second diversion channel corresponds to the upper region of the air deflector assembly 3; when the projected distance between the space circular curve 413 and the air deflector assembly 3 changes from small to large, it indicates that the inlet end of the first diversion channel corresponds to the upper region of the air deflector assembly 3, and the inlet end of the second diversion channel corresponds to the lower region of the air deflector assembly 3, as Figure 6 shown.

[0059] It should be noted that the above change trend of the space circular curve 413 only represents the change trend of the projected distance, that is, along the positive height direction of the air deflector assembly 3, the change trend of the projected distance of the space circular curve 413 at the lowest end and the highest end. The space circular curve 413 has a certain degree of twist, and the specific projected distance of the middle section between the two ends is not limited in this embodiment.

[0060] More specifically, when the change trend is from small to large, the area of the first air inlet region 411 is smaller than the area of the second air inlet region 412. When the change trend is from large to small, the area of the first air inlet region 411 is larger than the area of the second air inlet region 412. It can be understood that when the change trend is from small to large, the inlet end of the first diversion channel (the first air inlet region 411) corresponds to the upper region of the air deflector assembly 3, and the inlet end of the second diversion channel (the second air inlet region 412) corresponds to the lower region of the air deflector assembly 3. A large amount of oil fume generated by the cooking appliance mainly enters through the second air inlet region 412 at the lower part of the air deflector assembly 3. Therefore, it is necessary to make the area of the first air inlet region 411 smaller than the area of the second air inlet region 412, so that the amount of oil fume entering the second diversion channel is larger, making the second air inlet region 412 the main oil fume suction area and the first air inlet region 411 the secondary oil fume suction area, meeting the large oil fume volume requirement of the lower region of the air deflector assembly 3, as Figure 6 shown; when the change trend is from large to small, the inlet end of the second diversion channel (the second air inlet region 412) corresponds to the upper region of the air deflector assembly 3, and the inlet end of the first diversion channel (the first air inlet region 411) corresponds to the lower region of the air deflector assembly 3. At this time, it is necessary to make the area of the first air inlet region 411 larger than the area of the second air inlet region 412, making the first air inlet region 411 the main oil fume suction area and the second air inlet region 412 the secondary oil fume suction area, as Figure 3 shown, meeting the large oil fume volume requirement of the lower region of the air deflector assembly 3, forming a second air volume distribution, further improving the three-dimensional air distribution effect of the deflector 4, and preventing the oil fume in the lower region of the air deflector assembly 3 from escaping into the upper space due to insufficient suction volume.

[0061] As a preferred solution, the projection of the spatial circular curve 413 on the air deflector assembly 3 is located inside the boundary of the air deflector assembly 3, and the flow guide member 4 is located within the air guiding area of the air deflector assembly 3, which can effectively conduct layered diversion of the oil fume and distribute the components; moreover, the appearance is neat, and the air deflector assembly 3 can cover the flow guide member 4.

[0062] As a preferred solution, the air deflector assembly 3 includes a front panel 31 and flow guide vanes 32, as Figure 7 and Figure 8 shown; the flow guide vanes 32 are connected to the front panel 31. The flow guide vanes 32 include a ridge-shaped flow guiding portion 321. The flow guiding portion 321 can be accommodated in the first flow guiding channel, and the height direction of the flow guiding portion 321 extends along the oil fume flow direction. The ridge-shaped flow guiding portion 321 has flow guiding inclined surfaces on both sides. The oil fume flows from the bottom fitting the flow guiding inclined surface, flows along the flow guiding inclined surface, gradually changes the flow direction, and flows into the first flow guiding channel. The flow guiding portion 321 can rectify the oil fume and slow down the air flow counter-flush on both sides of the front panel 31; specifically, the ridge line of the flow guiding portion 321 extends along the height direction of the air deflector assembly 3. The front panel 31 is a circular panel or an oval panel. The material of the front panel 31 can be selected as a glass panel, and the appearance is more delicate and beautiful; of course, the front panel 31 can also be made of materials such as stainless steel, which is not limited to this embodiment.

[0063] As a preferred solution, the smoke collecting hood 1 further includes a plurality of first connectors 12 provided on the panel 11, and the air deflector assembly 3 includes a plurality of second connectors 33. The first connectors 12 are detachably connected to the second connectors 33. In the embodiment of the present invention, the first connectors 12 are hooks, and the two first connectors 12 are respectively arranged above both sides of the smoke inlet hole of the panel 11. Correspondingly, the second connectors 33 are hanging rings arranged on the air deflector assembly 3, so as to facilitate hanging the air deflector assembly 3 on the smoke collecting hood 1, and a gap can be formed between the two for inhaling the oil fume, and the disassembly and assembly are relatively convenient. In other embodiments, the specific structures of the first connectors 12 and the second connectors 33 are not limited to this embodiment, as long as the connection between the smoke collecting hood 1 and the air deflector assembly 3 can be realized.

[0064] Furthermore, the smoke collecting hood 1 further includes a mounting bracket 13 provided on the panel 11, and the mounting bracket 13 is configured to support the air deflector assembly 3. The mounting bracket 13 in the embodiment of the present invention is a bracket with an arc-shaped side surface. An installation space is formed between the mounting bracket 13 and the panel 11 to accommodate the air deflector assembly 3; the arc-shaped side surface has a better appearance effect.

[0065] As a preferred solution, the air guide plate assembly 3 also includes a plurality of third connecting members, and the air guide member 4 is provided with a plurality of fourth connecting members, and the third connecting members are detachably connected to the fourth connecting members, so that the air guide member 4 is easy to disassemble for cleaning. In the embodiment of the present invention, the third connecting member is a hook, and correspondingly, the fourth connecting member is a hook hole, and the third connecting member hooks the fourth connecting member to form the air guide member 4 hanging on the air guide plate assembly 3, which is convenient for disassembly and assembly. Furthermore, two positioning bolts are further provided on the air guide plate assembly 3, corresponding to the lower part of the third connecting member, and correspondingly, two positioning holes are provided on the air guide member 4, and the two positioning bolts and the two positioning holes are inserted one by one, so as to further limit the position of the air guide member 4 and avoid shaking.

[0066] As a preferred solution, the air guide plate assembly 3 further includes a metal support plate 34, which is connected to a side of the front panel 31 close to the air guide member 4, and the second connecting member 33 and the third connecting member are both fixedly arranged on the metal support plate 34. The metal support plate 34 and the front panel 31 can be connected by liquid adhesive or solid adhesive, and the metal support plate 34 can increase the strength of the front panel 31; the positioning bolt is also arranged on the metal support plate 34 to prevent the connection between the above-mentioned connecting members from damaging the front panel 31, thereby maintaining the aesthetics of the front panel 31.

[0067] As a preferred solution, the projection of the spatial annular curve 413 on the panel 11 is a partial circular curve or a petal-shaped curve, and the concave portion of the petal-shaped curve forms an escape space. Figure 9 As shown, the concave portion of the petal-shaped curve forms an escape space to escape the connection between the first connecting member 12 and the second connecting member 33, and the clamping connection between the air guide plate assembly 3 and the mounting frame 13. Therefore, the projection of the spatial annular curve 413 on the panel 11 is a three-petal petal-shaped curve with three escape spaces. In other embodiments, other shapes of projection curves or other numbers of escape spaces may be selected according to the need for escape, which is not limited to the embodiments of the present invention.

[0068] As a preferred solution, when the projection of the spatial ring-shaped curve 413 on the panel 11 is a partial circular curve, such as Figure 10 As shown, the air guide 4 is provided with an avoidance hole 43. In a preferred embodiment, the projection of the spatial annular curve 413 on the panel 11 is a partial circular curve, which has a more beautiful appearance and reduces the processing technology requirements. At this time, it is necessary to set the avoidance hole 43 on the air guide 4, and the first connecting member 12 and the second connecting member 33 are connected through the avoidance hole 43. Moreover, the position of the air guide 4 can be determined by the matching size of the first connecting member 12, the second connecting member 33 and the avoidance hole 43, and there is no need to set the third connecting member and the fourth connecting member, that is, the air guide 4 can be limited between the air guide plate assembly 3 and the panel 11, and the structure is simpler.

[0069] Next, two specific embodiments are used to illustrate how the flow guide member 4 performs two air volume distributions.

[0070] Embodiment 1

[0071] As shown in Figure 11 , Embodiment 1 provides an oil fume extractor with a flow guide member, including the above-mentioned smoke collecting hood 1, fan assembly 2, air deflector assembly 3 and flow guide member 4. The flow guide member 4 can conduct layered diversion of the flowing oil fume, avoid strong turbulent regions caused by circumferential air intake after the oil fume passes through the air deflector assembly 3, reduce aerodynamic noise, avoid poor air intake resulting in oil fume escape, and improve the effective smoking rate.

[0072] In Embodiment 1, by defining the shape of the spatial circular curve 413 at the top of the air inlet end 41 of the flow guide member 4, that is, adjusting the projection distance between each point on the spatial circular curve 413 and the air deflector assembly 3, along the positive height direction of the air deflector assembly 3, the projection distance changes from large to small, and the spatial area of the first air inlet region 411 is larger than the spatial area of the second air inlet region 412. Therefore, the first air inlet region 411 faces downward of the air deflector assembly 3 as the main smoking area, and the second air inlet region 412 faces upward of the air deflector assembly 3 as the secondary smoking area, realizing the first air volume distribution. As shown in Figure 11 , the black dotted line frame shown is the regional schematic diagram of the first air inlet region 411 and the second air inlet region 412.

[0073] As a preferred solution, the ratio of the cross-sectional area of the air outlet end 42 to the cross-sectional area of the air inlet 21 is positively correlated with the area of the first air inlet region 411. To adapt to the fact that the smoking volume of the first air inlet region 411 is greater than that of the second air inlet region 412, the cross-sectional area of the air outlet end 42 in Embodiment 1 accounts for 60%-80% of the cross-sectional area of the air inlet 21, realizing the second air volume distribution, so that the air volume generated by the fan assembly 2 can be proportionally and evenly distributed to the first air inlet region 411 and the second air inlet region 412, making a primary adjustment and distribution of the air volume, realizing the multi-dimensional and three-dimensional air distribution effect of the flow guide member 4, and matching the air intake volume of the first diversion channel and the second diversion channel with the inhaled oil fume volume.

[0074] Furthermore, within the first air inlet region 411, with the middle height of the air deflector assembly 3 as the separation, the first air inlet region 411 is divided into the upper half region one and the lower half region one. By controlling the projection distance between each point on the spatial circular curve 413 and the air deflector assembly 3, the smoking volume of the lower half region one accounts for 70%-90% of the smoking volume of the first air inlet region 411. As the height increases, the smoking volume of the upper half region one gradually decreases. This structure is more suitable for the smoking volume requirement at the lower part of the oil fume extractor and can effectively avoid oil fume escape.

[0075] Embodiment 2

[0076] As shown Figure 12 in the figure, the second embodiment provides an oil fume machine with a flow guiding member, which includes the above-mentioned smoke collecting hood 1, the fan assembly 2, the air guiding plate assembly 3 and the flow guiding member 4. The flow guiding member 4 can conduct hierarchical diversion of the flowing oil fume, avoid strong turbulent regions caused by circumferential air intake after the oil fume passes through the air guiding plate assembly 3, reduce pneumatic noise, avoid oil fume escape caused by poor air intake, and improve the effective smoking rate.

[0077] In the second embodiment, the projection distances between the points on the spatial circular curve 413 and the air guiding plate assembly 3 are adjusted. Along the positive height direction of the air guiding plate assembly 3, the variation trend of the projection distance is from small to large (opposite to the first embodiment), and the spatial area of the first air intake region 411 is smaller than the spatial area of the second air intake region 412. Therefore, the second air intake region 412 faces downward of the air guiding plate assembly 3 as the main smoking area, and the first air intake region 411 faces upward of the air guiding plate assembly 3 as the secondary smoking area, realizing the primary air volume distribution. As Figure 12 shown in the figure, the black dashed line frame is the regional schematic diagram of the first air intake region 411 and the second air intake region 412.

[0078] As a preferred solution, to adapt to the fact that the smoking volume of the first air intake region 411 is less than that of the second air intake region 412, the cross-sectional area of the air outlet end 42 in the first embodiment accounts for 20%-40% of the cross-sectional area of the air inlet 21, realizing the secondary air volume distribution, so that the air volume generated by the fan assembly 2 can be evenly distributed proportionally to the first air intake region 411 and the second air intake region 412, making a primary adjustment and distribution of the air volume, realizing the multi-dimensional and three-dimensional air distribution effect of the flow guiding member 4, and matching the air intake volume of the first flow guiding channel and the second flow guiding channel with the inhaled oil fume volume.

[0079] Furthermore, in the second air intake region 412, with the middle height of the air guiding plate assembly 3 as the separation, the second air intake region 412 is divided into the upper half region two and the lower half region two. By controlling the projection distances between the points on the spatial circular curve 413 and the air guiding plate assembly 3, the smoking volume of the lower half region two accounts for 70%-90% of the smoking volume of the second air intake region 412. As the height increases, the smoking volume of the upper half region two gradually decreases. This structure is more adaptable to the smoking volume requirement at the lower part of the oil fume machine and can effectively avoid oil fume escape.

[0080] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. An oil fume purifier with a flow guide member, comprising a smoke collecting hood (1) and a fan assembly (2) disposed in the smoke collecting hood (1), the smoke collecting hood (1) including a panel (11) provided with a smoke inlet hole, the fan assembly (2) being provided with an air inlet (21), the air inlet (21) corresponding to and communicating with the smoke inlet hole, characterized in that, The range hood further includes: A wind guide plate assembly (3), connected to the smoke collecting hood (1), and the wind guide plate assembly (3) corresponds to the air inlet hole; A flow guide member (4), connected to the wind guide plate assembly (3) or the smoke collecting hood (1). Along the direction of oil fume flow, an air inlet end (41) and an air outlet end (42) are respectively arranged at both ends of the flow guide member (4). The air outlet end (42) corresponds to the air inlet (21). A first air inlet area (411) is formed between the air inlet end (41) and the wind guide plate assembly (3). The first air inlet area (411) communicates with the air inlet (21) through the inner cavity of the flow guide member (4) to form a first flow guide channel. A second air inlet area (412) is formed between the air inlet end (41) and the panel (11). The second air inlet area (412) communicates with the air inlet (21) through the outside of the flow guide member (4) to form a second flow guide channel; wherein, A space annular curve (413) is arranged at the top end of the air inlet end (41). The space annular curve (413) and the wind guide plate assembly (3) form the first air inlet area (411), and the space annular curve (413) and the panel (11) form the second air inlet area (412). The projected distance between the space annular curve (413) and the wind guide plate assembly (3) has a changing trend. Along the positive height direction of the wind guide plate assembly (3), the changing trend is from small to large or from large to small.

2. The range hood with a flow guide according to claim 1, characterized in that, The flow guide member (4) is in a horn shape, and the cross-sectional area of the air inlet end (41) is larger than the cross-sectional area of the air outlet end (42). A smooth transition curved surface is arranged between the air inlet end (41) and the air outlet end (42).

3. The range hood with a flow guide according to claim 2, wherein, The radius of curvature of the smooth transition curved surface at the air inlet end (41) is larger than the radius of curvature at the air outlet end (42).

4. The range hood with a flow guide according to claim 1, wherein, A plane annular curve (421) is arranged at the top end of the air outlet end (42), and the plane annular curve (421) is perpendicular to the axis of the air inlet (21). The ratio of the cross-sectional area of the air outlet end (42) to the cross-sectional area of the air inlet (21) is positively correlated with the area of the first air inlet area (411).

5. The range hood with a flow guide according to claim 1, wherein, When the changing trend is from small to large, the area of the first air inlet area (411) is smaller than the area of the second air inlet area (412); when the changing trend is from large to small, the area of the first air inlet area (411) is larger than the area of the second air inlet area (412).

6. The range hood with a flow guide according to claim 1, wherein, The projection of the space annular curve (413) on the wind guide plate assembly (3) is located inside the boundary of the wind guide plate assembly (3).

7. The range hood with a flow guide according to claim 1, characterized in that, The wind guide plate assembly (3) includes: A front panel (31); A flow guide piece (32), the flow guide piece (32) is connected to the front panel (31). The flow guide piece (32) includes a ridge-shaped flow guide part (321). The flow guide part (321) can be accommodated in the first flow guide channel, and the height direction of the flow guide part (321) extends along the direction of oil fume flow.

8. The range hood with a flow guide according to claim 7, wherein, The ridge line of the diversion part (321) extends along the height direction of the wind deflector assembly (3).

9. The range hood with a flow guide according to claim 7, characterized in that, The smoke collecting hood (1) further includes a plurality of first connectors (12) arranged on the panel (11), the wind deflector assembly (3) includes a plurality of second connectors (33), and the first connectors (12) are detachably connected to the second connectors (33).

10. The range hood with a flow guide according to claim 1 or 9, characterized in that, The smoke collecting hood (1) further includes a mounting bracket (13) arranged on the panel (11), and the mounting bracket (13) is configured to support the wind deflector assembly (3).

11. The range hood with a flow guide according to claim 9, characterized in that, The wind deflector assembly (3) further includes a plurality of third connectors, and a plurality of fourth connectors are arranged on the diversion member (4), and the third connectors are detachably connected to the fourth connectors.

12. The range hood with a flow guide according to claim 11, characterized in that, The wind deflector assembly (3) further includes a metal support plate (34), the metal support plate (34) is connected to one side of the front panel (31) close to the diversion member (4), and the second connectors (33) and the third connectors are both fixedly arranged on the metal support plate (34).

13. The range hood with a flow guide according to claim 1, characterized in that, The projection of the space circular curve (413) on the panel (11) is a partial circular curve or a petal-shaped curve, and the recessed part of the petal-shaped curve forms an avoidance space.

14. The range hood with a flow guide according to claim 13, characterized in that, When the projection of the space circular curve (413) on the panel (11) is a partial circular curve, the diversion member (4) is provided with an avoidance hole (43).

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