Range hood

Abstract

The utility model discloses a range hood which comprises a smoke collecting box body and a filter screen arranged in the smoke collecting box body, the smoke collecting box body comprises a front panel located on the front side, a side smoke inlet is formed in the front panel, and the part, located above the side smoke inlet, of the front panel forms an upper panel; the filter screen comprises a first plate body and a second plate body, wherein the first plate body is tightly attached to the rear side surface of the upper panel to support the upper panel; the second plate body and the first plate body are integrally formed, the second plate body extends from the lower part of the lower end part of the first plate body to the rear part and gradually to the lower part in an inclined manner, and the second plate body is provided with meshes through which oil smoke sucked by the side smoke inlet passes.

Description

TECHNICAL FIELD

[0001] The utility model relates to an oil fume purification device, especially an oil fume extractor. BACKGROUND

[0002] The oil fume extractor has become one of the indispensable kitchen household electrical appliances in modern families. The oil fume extractor works by using the principle of fluid dynamics, sucking and discharging the oil fume through the centrifugal fan installed inside the oil fume extractor, and filtering part of the oil particles by using the filter screen.

[0003] The existing oil fume extractor, such as the side suction type oil fume extractor, usually sets the filter screen inside the smoke collecting hood, corresponding to the position of the smoke inlet, and connects to the rear side wall surface and the front panel of the smoke collecting hood to realize installation and fixation. As disclosed in the Chinese patent with the application number 202010609887.X of the applicant, the oil fume extractor includes a shell, an upper panel, and a lower panel assembly movably arranged at the front side of the shell. The shell is provided with a oil guide plate assembly through which the oil fume entering from the air inlet passes. The oil guide plate assembly includes a first oil guide plate extending from the front side of the shell to the rear, and a second oil guide plate extending downward from the rear end of the first oil guide plate.

[0004] This oil fume extractor, the filter screen (oil guide plate assembly) is an independently arranged component. When the front end of the filter screen is connected to the panel, the installation gap at the connection between the two is easy to cause oil leakage and flow downward, and the oil drops through the smoke inlet, which brings certain safety hazards.

[0005] Therefore, further improvement is needed. INVENTION CONTENTS

[0006] The utility model solves the technical problem that the existing technology has the above-mentioned deficiencies, provides an oil fume extractor, and improves the oil guiding performance.

[0007] The utility model adopts the technical scheme that an oil fume extractor includes a smoke collecting box body and a filter screen arranged in the smoke collecting box body. The smoke collecting box body includes a front panel located at the front side. The front panel is provided with a side smoke inlet. The front panel above the side smoke inlet is configured as an upper panel. The utility model is characterized by:

[0008] The filter screen includes:

[0009] A first plate body is arranged closely on the rear side surface of the upper panel to support the upper panel; and

[0010] A second plate body is integrally formed with the first plate body and extends backward and gradually downward from below the lower end of the first plate body. The second plate body is provided with mesh holes through which the oil fume sucked by the side smoke inlet passes.

[0011] The panel support (usually glass) and the filter screen are integrally formed, which can improve the oil guiding performance, reduce the oil path risk, improve the manufacturability and reduce the overall cost.

[0012] Preferably, the first plate body is formed with a clamping jaw on each of the left and right sides, which is clamped with the fume collecting box body, thereby facilitating the disassembly and assembly of the upper panel and the filter screen.

[0013] Further, to facilitate the cooperation of the fume collecting box body and the filter screen, the fume collecting box body comprises side plates on the left and right sides, the side plates comprise a first plate extending forward and backward, and a second plate bent and extended from the front end of the first plate to the other side plate, the first plate body is located in front of the second plate, and the clamping jaw is clamped with the second plate.

[0014] Further, to avoid the oil droplets on the filter screen from penetrating the side inlet into the smoke inlet, the projection of the front side edge of the mesh hole on the horizontal plane is located behind the projection of the lower edge of the side inlet on the horizontal plane.

[0015] Further, to improve the installation stability and strength of the overall structure of the upper panel and the filter screen, the transition position between the first plate body and the second plate body comprises a first bending portion and a second bending portion, the first bending portion extends backward and gradually downward from the lower end of the first plate body, the second bending portion extends backward and gradually downward from the lower end of the first bending portion, the second plate body extends backward from the lower end of the second bending portion, and the second bending portion is fixed with the fume collecting box body; by forming two bending portions, the inclination direction of the second bending portion can be adjusted to reduce the inclination angle, so that the fixed screw is fixed in the front-back direction during fixing, thereby facilitating the fixing operation.

[0016] Preferably, the included angle between the first bending portion and the horizontal plane is α, and satisfies: 12°≤α≤50°, so that the oil liquid is guided to the second bending portion, while avoiding the downward movement of the second bending portion space, and ensuring sufficient smoke inlet area of the side inlet.

[0017] Further, the lower end of the second bending portion is lower than the lower end of the upper panel, so that the oil fume of the side inlet can pass through the lower end of the second bending portion instead of the lower end of the upper panel, so that the negative pressure moves downward, and the lower end of the upper panel is prevented from accumulating oil.

[0018] Preferably, the vertical distance between the lower end of the second bending portion and the lower end of the upper panel is d, and satisfies: 10mm≤d≤25mm, so as to better ensure the flow path of the oil fume passing through the lower end of the second bending portion, and ensure that the second bending portion has sufficient space to set the fixed mounting hole.

[0019] In order to facilitate the connection of the smoke collecting box body and the first plate body and the second bending part of the filter screen, the smoke collecting box body comprises side plates located on the left and right sides, the side plates comprise a first plate extending forward and backward, a second plate bent and extended from the front end of the first plate to the other side plate, and a third plate bent backward from one side of the second plate away from the first plate, the first plate body is connected with the second plate, and the second bending part is connected with the third plate.

[0020] Further, the range hood further comprises a smoke baffle capable of opening and closing the side smoke inlet, the second bending part corresponds to the rear side of the second plate, the minimum distance between the second bending part and the second plate is L, and the following condition is met: 1mm≤L≤5mm, so that there is enough gap between the two after the smoke baffle is closed, the oil on the second bending part is prevented from flowing to the smoke baffle, and the risk of oil dripping from the smoke baffle is avoided, and the second bending part blocks the gap at the rear side of the splicing position of the upper plate and the smoke baffle after the smoke baffle is closed.

[0021] Further, the angle between the second plate body and the horizontal plane is β, and the following conditions are met: β≥12° and not greater than ∠NOP, on the same vertical plane along the front-rear direction of the range hood, point O is the intersection of the second plate body and the second bending part, point N is the intersection of the horizontal line passing through the intersection O and the rear plate, and point P is the intersection of the lower edge of the side smoke inlet and the rear plate, so that the oil on the second plate body can be guided backward, and the mesh hole is always above the lower edge of the side smoke inlet, so that the effectiveness of the opening is ensured.

[0022] Further, the left and right sides of the second plate body are formed with upwardly bent third bending parts, so as to enhance the strength of the second plate body.

[0023] In order to further improve the stability of the filter screen, the filter screen further comprises a third plate body integrated with the second plate body, and the third plate body is fixed with the rear plate of the smoke collecting box body located at the rear side.

[0024] Compared with the prior art, the advantages of the utility model lie in that the panel support supporting the panel (usually glass) and the filter screen are integrally formed, the splicing of two parts is avoided, the oil guiding performance is improved, the oil path risk is reduced, the manufacturability is improved, and the overall cost is reduced; two bending parts are arranged between the first plate body and the second plate body, the mounting surface (the second bending part) of the middle part of the filter screen is provided, the mounting stability and strength of the overall structure of the upper panel and the filter screen are improved in combination with the fixation of the first plate body and the smoke collecting box body, the inclination direction of the second bending part is adjusted by forming two bending parts, the inclination angle is reduced, and when fixed, the screw is fixed in the front-rear direction, so that the fixing operation is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1This is a schematic diagram of a range hood according to an embodiment of the present utility model (side smoke inlet closed);

[0026] Figure 2 This is a cross-sectional perspective view of the range hood according to an embodiment of the present utility model (side smoke inlet closed);

[0027] Figure 3 for Figure 2 A magnified schematic diagram of part I;

[0028] Figure 4 This is a cross-sectional perspective view of the range hood according to an embodiment of the present invention (side smoke inlet closed, cross-section with...). Figure 2 Parallel, perspective and Figure 2 different);

[0029] Figure 5 This is a schematic diagram of the upper panel and filter screen of the front panel of the range hood according to an embodiment of the present utility model;

[0030] Figure 6 This is a schematic diagram of the side panel and filter screen of the range hood according to an embodiment of the present utility model;

[0031] Figure 7 This is a cross-sectional side view of the range hood according to an embodiment of the present utility model (side smoke inlet closed);

[0032] Figure 8 This is a cross-sectional view of the range hood with the upper casing and fan hidden, according to an embodiment of the present utility model.

[0033] Figure 9 for Figure 8 A magnified schematic diagram of part II;

[0034] Figure 10 for Figure 8 A magnified schematic diagram of part III;

[0035] Figure 11 This is a schematic diagram of a range hood according to an embodiment of the present invention (side smoke inlet open). Detailed Implementation

[0036] The technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0037] It is to be understood that the terms "first", "second", and the like, used in the description and the claims of the present application as well as above-mentioned drawings of the present application merely serve the purpose of differentiating between two or more objects and do not necessarily imply a specific order or chronology. It is to be understood that the data thus designated can be interchanged, where appropriate, so that the embodiments of the present application described herein can be carried out in other than the order shown or described herein. Furthermore, the terms "comprising", "having", "including" and "containing" and any variations thereof used herein are intended to cover a non-exclusive inclusion, such that processes, methods, systems, articles, or apparatuses that comprise, have, include or contain a list of elements, but do not necessarily limited to those elements, can include other elements not expressly listed or inherent to such processes, methods, systems, articles, or apparatuses.

[0038] Various exemplary embodiments, features, and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same reference numbers in different drawings represent the same or similar elements. Although various aspects of embodiments are illustrated in the drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

[0039] The term "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations.

[0040] The term "and / or" used herein only means an association relationship of the associated objects, and means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the term "at least one" herein means any one of a plurality or any combination of at least two of a plurality, for example, including at least one of A, B, and C can mean including any one or more elements selected from the set consisting of A, B, and C.

[0041] The specific angles, heights, widths, and the like values given in the specific embodiments below are all corresponding to the specific drawings.

[0042] In addition, in order to better illustrate the present disclosure, numerous specific details are given in the specific embodiments below. Those skilled in the art should understand that the present disclosure can also be implemented without some specific details. In some examples, methods, means, elements and circuits well known to those skilled in the art are not described in detail, in order to highlight the main idea of the present disclosure.

[0043] Reference is made to Figures 1-10A range hood includes an upper housing 1 and a smoke collection housing 2 connected below the upper housing 1. The smoke collection housing 2 includes a first part 21 extending laterally and a second part 22 extending longitudinally, with the second part 22 extending downward from the rear side of the first part 21. Thus, the smoke collection housing 2 as a whole forms an approximate "7" shape. The second part 22, the first part 21, and the upper housing 1 are in sequential fluid communication. A fan 3 is installed inside the upper housing 1.

[0044] The first part 21 includes a smoke hood, which can be integral to or part of the first part 21. The second part 22 has a front panel 221, which can gradually tilt backward from top to bottom.

[0045] The smoke hood includes a hood body 211, within which a smoke collection chamber 2111 with an open bottom surface is formed, serving as a smoke collection buffer. The top surface of the hood body 211 forming the smoke collection chamber 2111 (i.e., the overall top surface of the hood body 211) extends in an inclined form, rising from front to back and then falling. In this embodiment, the top surface includes a first top plate 2112, a second top plate 2113, and a third top plate 2114. The first top plate 2112 gradually slopes downward from front to back, the third top plate 2114 gradually slopes downward from the front end of the first top plate 2112, and the second top plate 2113 gradually slopes downward from the rear end of the first top plate 2112 (in the range hood installation state, "front" refers to the side closer to the user, and "rear" refers to the side closer to the mounting wall). The rear end of the second top plate 2113 is located behind the front panel 221 of the second part 22. In this embodiment, the slope of the second top plate 2113 is greater than that of the first top plate 2112. Alternatively, the inclination of the first top plate 2112 and the second top plate 2113 can be the same. The shape of the smoke collection chamber 2111 described above can have a better oil guiding effect, allowing the oil adsorbed on the surface of the cover 211 to gather and collect backward along the first top plate 2112 and the second top plate 2113, and flow downward along the inner wall of the second part 22, thus avoiding flowing down from the front surface of the front panel 221.

[0046] The smoke collection chamber 2111 is mostly located on the front side of the front panel 221 of the second part 22, and at least partially on the rear side of the front panel 221. The first part 21 has a top smoke inlet located outside the smoke collection chamber 2111, which is located on the rear side of the front panel 221 and lower than the smoke collection chamber 2111. In the oil fume flow path, the top smoke inlet is located downstream of the smoke collection chamber 2111 as a whole. This arrangement allows the top smoke inlet to be hidden from the front view when the unit is mounted on the wall, avoiding frequent cleaning of the exposed parts, improving the overall aesthetics, and achieving a fully concealed oil fume absorption effect from the top smoke inlet.

[0047] The overall height of the smoke collecting cavity 2111 is gradually increased from front to back and then gradually decreased. The three top plates have the same length along the left-right direction of the range hood.

[0048] The top smoke inlet is not higher than the front panel 211. In this embodiment, the top smoke inlet is formed by a first folded edge 212 and a second folded edge 213, both of which are open plate structures. The first folded edge 212 extends downward from the rear end of the cover 211 (the smoke collecting cavity 2111 is usually formed by stretching, and due to the limitation of the stretching process, the rear end of the cover 211 is a stretching plane located behind the rear end of the second top plate 2113, rather than the rear end of the second top plate 2113. The plane where the rear end of the cover 211 is located is the bottom surface M2 of the smoke collecting cavity 2111 described above). The second folded edge 213 is located below the first folded edge 212 and extends forward from the lower end of the first folded edge 212 to the rear surface of the front panel 221. The front end of the second folded edge 213 extends downward to form a third folded edge 214. The cover 211, the first folded edge 212, the second folded edge 213, and the third folded edge 214 can be integrally formed.

[0049] The included angle between the first folded edge 212 and the rear end of the cover 211 is A, which affects the distance from the first folded edge 212 to the oil risk area (vertical drop to the front end of the side smoke inlet 222 described below). To reduce the risk of oil droplets and facilitate the difficulty of processing blanking, it is preferred to satisfy 75°≤A≤110°. The included angle formed between the first folded edge 212 and the second folded edge 213 is B. Based on the processability of demolding, it is avoided to form a concave structure that cannot be bent and demolded (the bending and demolding direction is shown by the arrow F2 in Figure 9 , which is parallel to the bottom surface M2 of the cover 211), and it is satisfied that B≥70°. The acute angle between the second folded edge 213 and the horizontal plane M1 is θ, and it is satisfied that θ≥0°, more preferably θ≥12°, thereby facilitating the downward guidance of oil liquid flowing from the first folded edge 212. The third folded edge 214 is parallel to the front panel 221 of the second part 22, which can ensure more contact surface after installation with the front panel 221, ensure welding with the left and right connecting structures and better support the front panel 221, and play a better supporting role when the user cleans and presses.

[0050] As described above, the first folded edge 212 and the second folded edge 213 are both perforated plate members. The first folded edge 212 has at least two first smoke inlets 2121 arranged along the left-right direction of the range hood, and the second folded edge 213 has at least two second smoke inlets 2131 arranged along the left-right direction of the range hood. The first folded edge 212 constitutes a first smoke inlet portion of the top smoke inlet, and the second folded edge 213 constitutes a second smoke inlet portion of the top smoke inlet. Through the arrangement of the smoke inlets as described above, on the one hand, the air inlet area requirement is ensured, thereby ensuring the performance and the oil fume suction effect, and on the other hand, the smoke inlets arranged at intervals have better strength relative to the overall long strip smoke inlet, which improves the stability of the structure and the consistency of the material state of the parts, thereby ensuring the reliability of the oil fume suction effect.

[0051] Since the first smoke inlets 2121 are located at the rear side of the smoke collecting cavity 2111 and are lower than the smoke collecting cavity 2111, part of the oil fume flows out (is guided backward and downward) from the smoke collecting cavity 2111, then flows out smoothly backward from the first smoke inlets 2121, and enters the fan 3 arranged in the upper cabinet 1 upward after turning inside the first portion 21, which can reduce the loss caused by the sudden change in flow direction of the oil fume passing through the first smoke inlets 2121. A small part of the oil fume passes through the second smoke inlets 2131 downward into the inside of the second portion 22, and the oil fume entering the second portion 22 rises upward, and the arrangement of the second smoke inlets 2131 can avoid the oil fume that has not been guided to the first smoke inlets 2121 from accumulating in the space formed by the first folded edge 212, the second folded edge 213, and the front panel 221 to generate vortex, and timely guide this part of the oil fume out to avoid affecting the normal discharge of the oil fume from the first smoke inlets 2121 and the noise that may be caused thereby.

[0052] The front panel 221 of the second portion 22 of the smoke collecting cabinet 2 is provided with a side smoke inlet 222, so that the front panel 221 is divided into an upper panel 2211 located above the side smoke inlet 222 and a lower panel 2212 located below the side smoke inlet 222. The oil fume mainly enters the smoke collecting cabinet 2 from the side smoke inlet 222, and the oil fume that is not sucked into the side smoke inlet 222 rises upward until it reaches the smoke collecting cavity 2111 and is sucked in from the top smoke inlet. A smoke baffle 4 can be arranged on the smoke collecting cabinet 2, which can open and close the side smoke inlet 222. In this embodiment, the smoke baffle 4 is opened and closed in a flip motion, and the closed state is shown in Figure 1 , and the open state is shown in Figure 11 .

[0053] The fan 3 comprises a volute 31, an impeller 32 arranged in the volute 31, and a motor 33 for driving the impeller 32 to rotate. The volute 31 comprises a first cover plate 311 and a second cover plate 312 arranged oppositely, and the first cover plate 311 is located at the rear side of the second cover plate 312. The fan 3 is a double-inlet centrifugal fan, comprising a first inlet 341 facing the rear side and a second inlet 342 facing the front side, the first inlet 341 serving as a main inlet and being arranged on the first cover plate 311, and the second inlet 342 serving as a sub-inlet and being arranged on the second cover plate 312, forming a back-suction form.

[0054] The bottom of the volute 31 is opposite to the top surface of the cover body 211, and the bottom of the volute 31 is provided with an oil drain nozzle 35, and the projection (orthographic projection, the projection described below is orthographic projection) of the oil drain nozzle 35 on the horizontal plane M1 falls within the projection range of the top surface of the cover body 211 on the horizontal plane M1. As shown in the embodiment, the oil drain nozzle 35 is located above each top plate of the cover body 211 and is located at the rear side of the highest point of each top plate of the cover body 211, so as to guide the oil liquid rearward. Preferably, in the embodiment, the oil drain nozzle 35 is located above the second top plate 2112. In this way, the oil liquid in the volute 31 drips downward to the top plate of the cover body 211 through the oil drain nozzle 35, and flows along the rear end stretching plane of the cover body 211 to the top smoke inlet.

[0055] The range hood further comprises a filter screen 6 arranged in the smoke collecting box body 2. The filter screen 6 comprises a first plate body 61, a second plate body 62 and a third plate body 63 which are integrally formed, the first plate body 61 is arranged close to the rear side surface of the upper plate 2211 of the front plate 221 and serves as a supporting surface (like a common plate support) of the upper plate 2211, so that the third folding edge 214 is fixed close to the rear side surface of the first plate body 61. The first plate body 61 extends downward along the front plate 221 and can be close to the front plate 221. The second plate body 62 can extend rearward from the lower end of the first plate body 61 to the rear plate 223 at the rear side of the second part 22, and the third plate body 63 extends downward from the rear end of the second plate body 62, and the third plate body 63 can be fixed with the rear plate 223. The third plate body 63 and the rear plate 223 can have a certain space gap, which is used for the realization of the mounting and fixing structure, and the rear gap is also a hidden channel for the oil liquid flowing on the upper part of the second plate body 62, and the mounting hole position capable of being detachably fixed with the rear plate is arranged.

[0056] The second plate body 62 extends gradually downward from front to rear, and preferably, the transition position of the second plate body 62 and the first plate body 61 can be formed with a bend (which will be described in detail below). The position of the second plate body 62 corresponds to the side smoke inlet 222, and the front end of the second plate body 62 is close to the upper edge of the side smoke inlet 222.

[0057] The second plate body 62 is provided with a mesh hole 621, so that the oil fume sucked by the side oil fume inlet 222 passes upward and is filtered. The mesh hole 621 can be multiple and is arranged along the left-right direction of the range hood. Preferably, the mesh hole 621 is a long strip-shaped flange hole, and the length direction of the mesh hole 621 is the front-back direction of the range hood. In order to avoid the oil liquid directly dripping through the mesh hole 621 and then dripping through the side oil fume inlet 222 from the second plate body 62 above, the front side edge of the mesh hole 621 is projected on the horizontal plane M1 (the projection direction is shown by the arrow F1) and is located on the rear side of the lower edge of the side oil fume inlet 222 projected on the horizontal plane M1, and is also located on the rear side of the lower side end of the first flange 212 projected on the horizontal plane M1, so as to avoid the oil liquid directly dripping from the top oil fume inlet and dripping through the mesh hole 621, but dripping on the solid plate body outside the mesh hole 621. Referring to Figure 7 The projection track of the front side edge of the mesh hole 621 is shown by the dashed line M3, the projection track of the lower edge of the side oil fume inlet 222 is shown by the dashed line M4, and the projection track of the lower side end of the first flange 212 is shown by the dashed line M5.

[0058] The projection of the last side of the volute 31 on the horizontal plane M1 is located on the front side of the projection of the front side edge of the mesh hole 621 on the horizontal plane M1, so as to ensure that the oil liquid on the surface of the volute 31 does not drip through the mesh hole 621.

[0059] The left and right sides of the first plate body 61 are respectively formed with a clamping jaw 64, and the smoke collecting box body 2 includes a side plate 23 located on the left and right sides, and the first part 21 and the second part 22 share the side plate 23. The clamping jaw 64 is clamped with the side plate 23, so as to realize the limiting fixation with the whole machine and facilitate the subsequent disassembly and installation.

[0060] The bending between the first plate body 61 and the second plate body 62 includes a first bending part 651 and a second bending part 652. The first bending part 651 extends backward and gradually downward from the lower end of the first plate body 61, and the included angle between the first bending part 651 and the horizontal plane M1 is α, and satisfies: 12°≤α≤50°. The theoretical inclination angle is 12°, which is an empirical value of no dripping of the inclined surface guide flow, and 50° is based on the subsequent need of an installation plane (i.e. the second bending part 652) of the whole machine structure, so the inclination angle cannot be too large. If the inclination angle is too large, the second bending part 652 needs to be moved downward in order to ensure the installation space, which further compresses the cross-sectional size of the side oil fume inlet 222, and affects the performance and oil fume suction effect of the whole machine.

[0061] The second bending part 652 extends rearward and gradually downward from the lower end of the first bending part 651, and mounting holes 6521 are arranged on the left and right sides of the second bending part 652 for fixing the side plate 23, which can be fixed by screws. Compared with single bottom screw fixing, the overall strength is effectively improved. The lower end of the second bending part 652 is lower than the lower end of the upper panel 2211, and the vertical distance between the lower end of the second bending part 652 and the lower end of the upper panel 2211 is d, and satisfies: 10mm≤d≤25mm. On the one hand, it ensures that the second bending part 652 has enough space to arrange the fixed mounting hole position, and at the same time, the distance difference between the two ensures that the oil fume in the side smoke inlet 222 area passes through the lower end of the second bending part 652 when the range hood is working, but not through the lower end of the upper panel 2211. It is equivalent to that the second bending part 652 moves the negative pressure downward, avoiding oil accumulation at the lower end of the upper panel 2211. Considering that the upper panel 2211 is inclined, if oil accumulates here, it will directly fall to the cooking surface and cannot be caught. By forming two bends, the inclination direction of the second bending part 652 is adjusted to reduce the inclination angle, so that the fixed screw can be fixed in the front-rear direction during fixing, which is convenient for fixing operation.

[0062] The side plate 23 includes a first plate 231 extending front-rear, a second plate 232 bent and extending from the front side end of the first plate 231 to the other side plate 23, and a third plate 233 bent rearward from one side of the second plate 232 away from the first plate 231. The second plate 232 is a flat plate, and the first plate body 61 at least partially shields the front side of the second plate 232. The above-mentioned claw 64 is connected with the second plate 232, and the length of the upper panel 2211 in the left-right direction of the range hood is greater than the first plate body 61, so as to shield the second plate body 232 of the side plate 23, and the mounting hole 6521 of the second bending part 652 is connected with the third plate 233. The second bending part 652 corresponds to the rear side of the second plate 232, and the minimum distance between the second bending part 652 and the second plate 232 is L, and satisfies: 1mm≤L≤5mm, so as to ensure that there is enough gap between the two after the smoke baffle 4 is closed (the smoke baffle 4 is closed on the front side of the second plate 232 and is flush with the front panel 221), avoiding that the oil on the second bending part 652 flows to the smoke baffle 4 and causing the risk of oil dripping of the smoke baffle 4. Moreover, the existence of the second bending part 652 shields the gap on the rear side of the splicing position of the upper panel 2211 and the smoke baffle 4 after the smoke baffle 4 is closed, which improves the delicacy of the whole machine. The smaller L is, the higher the delicacy is.

[0063] The angle between the second plate body 62 and the horizontal plane M1 is β, and satisfies β≥12°, and is not greater than ∠NOP, wherein O is the intersection of the second plate body 62 and the second bending portion 652, N is the intersection of the horizontal line passing through the intersection O and the back panel 223, and P is the intersection P of the lower edge of the side portion smoke inlet 222 and the back panel 223, and the above-mentioned intersection is obtained on the same vertical plane in the front-rear direction (such as the cross section obtained in Figure 7 When the angle is not greater than ∠NOP, it is guaranteed that the mesh hole 621 is always above the lower edge of the side portion smoke inlet 222, so as to guarantee the effectiveness of the opening.

[0064] The left and right sides of the second plate body 62 are formed with the third bending portion 622 bent upward, so as to strengthen the overall strength of the second plate body 62.

[0065] During installation, after the claws 64 on the first plate body 61 are aligned with the clamping grooves on the corresponding side panel 23, the claws 64 are moved upward to achieve the upper preliminary limiting and fixing, then the screws at the left and right sides of the second bending portion 652 and the third plate body 63 are fixed, so as to realize the overall connection of the filter screen 6 and the smoke collecting box body 2.

[0066] The bottom of the smoke collecting box body 2 is provided with an oil cup 5, which can collect the oil flowing down from the smoke collecting box body 2.

[0067] The oil dripping from the volute 31 of the fan 3 and the oil flowing down from the front side of the upper box body 1 reaches the top smoke inlet, and part of the oil flows along the rear side surface of the first folding edge 212 and the lower surface of the second folding edge 213, and then flows downward along the third folding edge 214, the rear side surface of the first plate body 61 of the filter screen 6, the second plate body 62, the third plate body 63 and the back panel 223, and is collected into the oil cup 5 arranged at the bottom of the smoke collecting box body 2. Part of the oil drips from the lower end of the first folding edge 212, and can also be collected by the second plate body 62. Since this is the top smoke inlet, the oil fume entering from the outside will accelerate the dripping and gathering speed of the oil in this area, improve the oil collection efficiency, and reduce the accumulation of oil dirt in the top smoke inlet area.

[0068] The oil on the lower surface of the cover body 211 is collected to the rear end, part of which flows along the front side surface of the first folding edge 212 and the upper surface of the second folding edge 213, and then flows along the lower surface of the second folding edge 213 after passing through the second smoke inlet hole 2131, part of which flows along the rear side surface of the first folding edge 212 and the lower surface of the second folding edge 213 after passing through the first smoke inlet hole 2121, and then flows downward along the third folding edge 214, the rear side surface of the first plate body 61 of the filter screen 6, the second plate body 62, the third plate body 63 and the back panel 223, and is collected into the oil cup 5 arranged at the bottom of the smoke collecting box body 2.

[0069] The term "fluid communication" as used herein refers to a spatial relationship between two components or locations (hereinafter collectively referred to as first location and second location, respectively), i.e. a fluid (gas, liquid or a mixture of both) can flow or / and be transported from the first location to the second location along a flow path. The first location and the second location can be directly connected to each other or indirectly connected to each other via at least one third party, which can be a fluid passage such as a pipe, a channel, a conduit, a flow guide, a hole, a slot, etc. or a chamber allowing the fluid to flow therethrough or a combination thereof.

Claims

1. A range hood comprising a fume collecting box (2) and a filter screen (6) arranged in the fume collecting box (2), the fume collecting box (2) comprising a front panel (221) located at a front side, the front panel (221) being provided with a side fume inlet (222), and the front panel (221) being formed into an upper panel (2211) at a portion above the side fume inlet (222), characterized in that: the filter screen (6) comprises: a first plate body (61) arranged closely against a rear side surface of the upper panel (2211) to support the upper panel (2221); and a second plate body (62) integrally formed with the first plate body (61) and extending rearward and downward gradually from a lower end portion of the first plate body (61), the second plate body (62) being provided with mesh holes (621) for the oil fume sucked by the side fume inlet (222) to pass through. The left and right sides of the first plate body (61) are respectively formed with a clamping jaw (64) which is clamped and matched with the fume collecting box (2). The fume collecting box (2) comprises side plates (23) located at the left and right sides, the side plates (23) comprising first plates (231) extending frontward and rearward, and second plates (232) bent and extended from front side end portions of the first plates (231) to the other side plates (23), the first plate body (61) being located at a front side of the second plate (232), and the clamping jaw (64) being clamped with the second plate (232). A projection of a front side edge of the mesh hole (621) on a horizontal plane (M1) is located rearward of a projection of a lower edge of the side fume inlet (222) on the horizontal plane (M1).

2. The hood according to claim 1, characterized in that: A transition position between the first plate body (61) and the second plate body (62) comprises a first bending portion (651) and a second bending portion (652), the first bending portion (651) extending rearward and downward gradually from a lower end portion of the first plate body (61), the second bending portion (652) extending rearward and downward gradually from a lower end portion of the first bending portion (651), the second plate body (62) extending rearward from a lower end portion of the second bending portion (652), and the second bending portion (652) being fixed with the fume collecting box (2).

3. The hood according to claim 2, characterized in that: An included angle between the first bending portion (651) and the horizontal plane (M1) is a, and satisfies: 12°≤a≤50°.

4. The hood according to claim 1, characterized in that: The lower end portion of the second bending portion (652) is lower than a lower end portion of the upper panel (2211).

5. The hood according to claim 1, characterized in that: A vertical distance between the lower end portion of the second bending portion (652) and the lower end portion of the upper panel (2211) is d, and satisfies: 10mm≤d≤25mm.

6. The hood according to claim 5, characterized in that: The fume collecting box (2) comprises side plates (23) located at the left and right sides, the side plates (23) comprising first plates (231) extending frontward and rearward, second plates (232) bent and extended from front side end portions of the first plates (231) to the other side plates (23), and third plates (233) bent rearward from one side of the second plates (232) away from the first plates (231), the first plate body (61) being connected with the second plate (232), and the second bending portion (652) being connected with the third plate (233).

7. The hood according to claim 5, characterized in that: ​ 8. The hood according to claim 7, characterized in that: ​ 9. The hood according to claim 5, characterized in that: ​ 10. The hood according to claim 9, characterized in that: The range hood further comprises a smoke baffle (4) capable of opening and closing the side smoke inlet (222), the second bending portion (652) corresponds to the rear side of the second plate (232), the minimum distance between the second bending portion (652) and the second plate (232) is L, and 1mm≤L≤5mm is satisfied.

11. The hood according to any one of claims 1-10, characterized in that: The included angle between the second plate body (62) and the horizontal plane (M1) is β, and β≥12° and not more than ∠NOP are satisfied, on the same vertical plane along the front-rear direction of the range hood, point O is the intersection of the second plate body (62) and the second bending portion (652), point N is the intersection of the horizontal line passing through the intersection O and the rear panel (223), and point P is the intersection of the lower edge of the side smoke inlet (222) and the rear panel (223).

12. The hood according to any one of claims 1-10, characterized in that: The left and right sides of the second plate body (62) are formed with upwardly bent third bending portions (622).

13. The hood according to any one of claims 1-10, characterized in that: The filter screen (6) further comprises a third plate body (63) integrated with the second plate body (62), and the third plate body (63) is fixed with the rear panel (223) located at the rear side of the smoke collecting box body (2).

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