Range hood

Abstract

The utility model discloses a range hood which comprises a smoke collecting box body, an upper box body connected on the smoke collecting box body, a fan arranged in the upper box body and an oil cup arranged at the bottom of the smoke collecting box body, the smoke collecting box body comprises a first part which extends transversely and comprises a cover body and a top smoke inlet, and a smoke collecting cavity is formed in the cover body; the second part extends longitudinally and is located below the first part, the second part comprises a front panel, and a side smoke inlet is formed in the front panel; the fan comprises a volute, and an oil leakage nozzle is arranged at the bottom of the volute; the smoke collecting cavity is at least partially located on the front side of the front panel and at least partially located on the rear side of the front panel, the top smoke inlet is located on the rear side of the front panel, and the oil leakage nozzle is located above the cover body and located on the rear side of the highest point of the top face of the cover body.

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. At present, the oil fume extractor has various forms, including side suction type, top suction type and "7" type with top and side double suction. Among them, the oil fume extractor with top and side double suction, the side air inlet is arranged below the top air inlet, which is closer to the cooking bench and plays a major role in smoke suction, and the top air inlet is used to suck away the part escaping from the side air inlet. Such configuration can achieve a high oil fume suction rate.

[0003] The existing oil fume extractor with top and side double suction, such as the side and top type oil fume extractor disclosed in the Chinese patent (publication number CN110207233A) with the application number 201910512624.4, comprises a cover body, a fan housing is installed on the top wall of the cover body, the front panel of the cover body is arranged obliquely, a top smoke collection cover with an open bottom is fixed on the upper part of the front panel, a top suction air inlet is opened on the front panel at the connection part of the top smoke collection cover, the top suction air inlet is in communication with the smoke collection cavity formed by the top smoke collection cover and the front panel, and a front suction air inlet opening adjusting device is installed at each front suction air inlet corresponding to the center line of each cooking bench.

[0004] Such existing oil fume extractor, the top suction air inlet is located at the connection part of the top smoke collection cover and the front panel, and the top suction air inlet is located on the front plane, so that there will be obvious oil accumulation around the exposed air inlet, increasing the risk of oil dripping outward. Even if it does not drip, it will also flow downward along the inclined front panel, increasing the cleaning difficulty and reducing the user experience. In addition, the oil accumulated on the fan also has the risk of dripping downward through the front suction air inlet.

[0005] Therefore, further improvement is needed. UTILITY MODEL CONTENTS

[0006] The utility model solves the technical problem of the prior art, provides an oil fume extractor which can effectively collect the oil dripping from the fan.

[0007] The utility model adopts the technical scheme to solve the above technical problem: an oil fume extractor, comprising a smoke collecting box body, an upper box body connected to the smoke collecting box body, a fan arranged in the upper box body and an oil cup arranged at the bottom of the smoke collecting box body, wherein the smoke collecting box body comprises:

[0008] a first part extending transversely, comprising a cover body and a top smoke inlet, and a smoke collecting cavity is formed in the cover body; and

[0009] A second part extending longitudinally below the first part, the second part comprising a front panel, a side smoke inlet being formed on the front panel;

[0010] The fan comprises a volute, and an oil leakage nozzle is arranged at the bottom of the volute; and the fan further comprises a cover body arranged on the volute and comprising a top surface;

[0011] The smoke collecting cavity is at least partially located at the front side of the front panel and at least partially located at the rear side of the front panel, the top smoke inlet is located at the rear side of the front panel, and the oil leakage nozzle is located above the cover body and at the rear side of the highest point of the top surface of the cover body.

[0012] The oil leakage nozzle of the fan volute is located above the top surface of the cover body constituting the smoke collecting cavity and corresponds to the rear side of the highest point of the top surface, so that the oil dripping from the oil leakage nozzle of the volute can be received by the cover body, and the smoke collecting cavity is partially located at the rear side of the front panel and the top smoke inlet is located at the rear side of the front panel, so that the oil received by the cover body can flow into the second part from the inside, without flowing to the front side of the front panel from the edge of the smoke collecting cavity or the top smoke inlet, thereby avoiding the risk of oil path and reducing the difficulty of cleaning.

[0013] Further, the front panel comprises an upper panel located above the side smoke inlet and a lower panel located below the side smoke inlet.

[0014] The filter screen is arranged in the smoke collecting box and comprises a first plate body and a second plate body, the first plate body extends downward along the rear side surface of the upper panel, the second plate body extends rearward from the lower end of the first plate body to the rear panel at the rear side of the second part, the second plate body extends downward from front to rear, the front side end of the second plate body is close to the upper edge of the side smoke inlet, and the second plate body is provided with mesh holes. In this way, the filter screen can filter the oil fume entering through the side smoke inlet and receive the oil dripping from the rear side of the cover body.

[0015] To avoid the oil dripping downward from the rear side of the volute through the filter screen, the projection of the rear side of the volute on the horizontal plane is located in front of the projection of the front side edge of the mesh holes on the horizontal plane.

[0016] Further, to facilitate the formation of the top smoke inlet, the top smoke inlet comprises a first smoke inlet part, the first smoke inlet part is located at the rear side of the smoke collecting cavity and below the smoke collecting cavity, the first part further comprises a first folded edge constituting the first smoke inlet part, the first folded edge is a perforated plate, the first folded edge extends downward from the rear side end of the cover body, and the first folded edge is directly or indirectly connected to the first plate body.

[0017] Further, to increase the smoke inlet area, the top smoke inlet further comprises a second smoke inlet part, the first part further comprises a second folded edge constituting the second smoke inlet part, the second folded edge is also a perforated plate, and the second folded edge extends forward from the lower end of the first folded edge to the front panel. By providing the second folded edge, the second smoke inlet part can be conveniently formed, and the oil fume that is not guided to the first smoke inlet part in time can be prevented from accumulating in the space formed by the first folded edge, the second folded edge and the front panel to form a vortex, and the oil fume is guided out in time to avoid affecting the normal discharge of the oil fume from the first smoke inlet part and the noise that may be caused thereby; at the same time, the oil on the first folded edge can be guided downward to the front panel and then flow down along the front panel to avoid splashing in the smoke collection box, and since the top smoke inlet is located at the top, the oil fume entering from the outside can accelerate the dripping and gathering speed of the oil at this area, improve the oil collection efficiency, and reduce the accumulation of oil dirt at the top smoke inlet area.

[0018] Further, to improve the manufacturability of the top smoke inlet, the included angle formed between the first folded edge and the second folded edge is B, and B≥90° is satisfied to avoid forming a concave structure that cannot be bent and demolded during processing.

[0019] Further, the acute angle between the second folded edge and the horizontal plane is θ, and θ≥12° is satisfied, so as to conveniently guide the oil flowing down from the first folded edge downward.

[0020] To avoid the oil dripping down from the first folded edge directly dripping through the filter screen, the projection of the front side edge of the screen hole on the horizontal plane is located behind the projection of the lower end of the first folded edge on the horizontal plane.

[0021] To avoid the oil dripping down from the filter screen directly dripping through the side smoke inlet, the projection of the front side edge of the screen hole on the horizontal plane is located behind the projection of the lower edge of the side smoke inlet on the horizontal plane.

[0022] Further, to conveniently receive the oil flowing down from the front side of the upper box, the first part further comprises a top plate located above the cover body, and the upper box is connected to the top plate.

[0023] The extractor hood further comprises an oil guide plate, and the oil guide plate comprises an oil guide plate body located at the bottom of the upper box, and the rear end of the oil guide plate body is located above the cover body.

[0024] To conveniently guide the oil dripping down from the oil guide plate body rearward, the projection of the rear end of the oil guide plate body on the horizontal plane is located behind the highest point of the top surface of the cover body on the horizontal plane.

[0025] Further, the oil guide plate further comprises a flange formed on the front side and the left and right sides of the oil guide plate body, the flange is wrapped outside the front side bottom and the left and right side bottoms of the upper box body respectively, the flange can be used for oil liquid collection and can ensure that the oil liquid on the front side of the upper box body can be completely collected, and the first part front side conventional switch assembly and other parts can be isolated from the oil path environment to a certain extent.

[0026] Further, the volute is fixed to the rear side of the upper box body through a mounting bracket, the mounting bracket is gradually inclined downward from front to back, so that the oil liquid collected on the mounting bracket can be effectively guided to the rear side wall surface of the upper box body along the inclined surface, and the oil liquid can be prevented from being randomly dropped in the upper box body, thereby avoiding the oil path risk.

[0027] Preferably, the cover body constitutes the top surface of the smoke collecting cavity, the top surface of the smoke collecting cavity comprises a first top plate, a second top plate and a third top plate, the first top plate is gradually inclined downward from front to back, the second top plate is gradually inclined downward from the rear side end of the first top plate to back, the third top plate is gradually inclined downward from the front side end of the first top plate to front, the junction of the first top plate and the third top plate is the highest point of the top surface of the cover body, and the oil leakage nozzle is located above the first top plate.

[0028] Compared with the prior art, the oil leakage nozzle of the fan volute is located above the top surface of the smoke collecting cavity constituted by the cover body, and corresponds to the rear side of the highest point of the top surface, so that the oil liquid dropped from the oil leakage nozzle of the volute can be collected by the cover body, the smoke collecting cavity is located at the rear side of the front panel, and the top smoke inlet is located at the rear side of the front panel, so that the oil liquid collected by the cover body can flow into the second part from the rear side, without flowing to the front side of the front panel from the edge of the smoke collecting cavity or the top smoke inlet, thereby avoiding the oil path risk and reducing the cleaning difficulty. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 FIG. 1 is a schematic view of an extractor hood according to an embodiment of the present application (side smoke inlet closed);

[0030] Figure 2 FIG. 2 is a sectional perspective view of the extractor hood according to the embodiment of the present application (side smoke inlet closed);

[0031] Figure 3 FIG. 3 is a sectional perspective view of the extractor hood according to the embodiment of the present application (side smoke inlet closed); Figure 2 ​

[0032] Figure 4 is a sectional perspective view of the range hood of the embodiment of the present application (side smoke inlet closed, section parallel to Figure 2 the view angle is different from Figure 2 that of the above figure);

[0033] Figure 5 is a schematic view of the upper box body and the oil guide plate of the range hood of the embodiment of the present application;

[0034] Figure 6 is a sectional side view of the range hood of the embodiment of the present application (side smoke inlet closed);

[0035] Figure 7 is a sectional view of the range hood of the embodiment of the present application, in which the upper box body and the fan are hidden;

[0036] Figure 8 is a partial II enlarged schematic view of Figure 7 ;

[0037] Figure 9 is a schematic view of the range hood of the embodiment of the present application (side smoke inlet open). DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0039] It should be noted that the terms "first", "second", and the like in the description and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or server including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0040] 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 numerals in the drawings represent functionally identical or similar elements. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

[0041] The term "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.

[0042] The term "and / or" used herein only means an association relation of associated objects, which means that there can be three relations, for example, A and / or B, which means that there can be three cases of A alone, A and B together, and B 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, which means including any one or more elements selected from the set consisting of A, B, and C.

[0043] The specific angles, heights, widths, and the like given in the specific embodiments below are all measured with respect to the corresponding specific drawings.

[0044] 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 certain specific details. In some examples, methods, means, elements and circuits that are well known to those skilled in the art are not described in detail in order to highlight the main ideas of the present disclosure.

[0045] Referring to Figures 1-9 An extractor hood includes an upper cabinet 1 and a smoke collecting cabinet 2 connected below the upper cabinet 1. The smoke collecting cabinet 2 includes a first part 21 extending horizontally and a second part 22 extending longitudinally, and the second part 22 extends downward from the rear side of the first part 21. Thus, the smoke collecting cabinet 2 as a whole forms a substantially "7" shape. The second part 22, the first part 21 and the upper cabinet 1 are sequentially in fluid communication. A fan 3 is arranged in the upper cabinet 1.

[0046] The first part 21 includes a smoke collecting cover, which can be formed as the whole of the first part 21 or as a part of the first part 21. The second part 22 has a front panel 221, which can be gradually inclined rearward from top to bottom.

[0047] The smoke hood includes a hood body 211, and a smoke collecting cavity 2111 formed in the hood body 211 and having a bottom opening, which functions to collect and buffer smoke. The top surface of the smoke collecting cavity 2111 (i.e., the top surface of the entire hood body 211) is inclined and extends from front to back in a manner of first increasing and then decreasing. 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 side end of the first top plate 2112, and the second top plate 2113 gradually slopes downward from the rear side end of the first top plate 2112 (in the state of installation of the range hood, “front” refers to the side close to the user, and “rear” refers to the side close to the installed wall surface). The junction of the first top plate 2112 and the third top plate 2114 is the highest point of the top surface of the hood body 211. The rear side end of the second top plate 2113 is located at the rear side of 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 slopes of the first top plate 2112 and the second top plate 2113 can be the same. The shape of the smoke collecting cavity 2111 described above can have a good oil guiding effect, so that the oil adsorbed on the surface of the hood body 211 is gathered and collected rearward along the first top plate 2112 and the second top plate 2113, and flows downward along the inner wall surface of the second part 22, thereby avoiding flowing downward from the front surface of the front panel 221.

[0048] The smoke collecting cavity 2111 is located at least partially 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 arranged outside the smoke collecting cavity 2111, which is located on the rear side of the front panel 221 and is also lower than the smoke collecting cavity 2111. In the oil fume flow path, the top smoke inlet is located downstream of the entire smoke collecting cavity 2111. In this way, the user can achieve the hiding of the top smoke inlet in the front view in the hanging state, avoid frequent cleaning of the exposed part, and also improve the overall aesthetics, achieving the full-hidden range hood effect of the top smoke inlet.

[0049] The overall height of the smoke collecting cavity 2111 arranged as above gradually increases from front to back and then gradually decreases. The three top plates have the same length in the left-right direction of the range hood.

[0050] The top smoke inlet is not higher than the front panel 211, in this embodiment, the top smoke inlet is formed by the first folded edge 212 and the 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 body 211 (the smoke collecting cavity 2111 is usually formed by stretching, due to the limitations of the stretching process, the rear end of the cover body 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 body 211 is located is the bottom surface M2 of the smoke collecting cavity 211 described above), and the second folded edge 213 is located below the first folded edge 212, extending 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 body 211, the first folded edge 212, the second folded edge 213, and the third folded edge 214 can be integrally formed.

[0051] The included angle between the first folded edge 212 and the rear end of the cover body 211 is A, the selection of this included angle affects the distance from the first folded edge 212 to the oil path risk area (vertical drop to the front end of the side smoke inlet 222 described below), in order to reduce the risk of oil droplets and facilitate the difficulty of processing blanking, preferably 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, to avoid forming a concave structure that cannot be bent and demolded (the bending and demolding direction is shown by the arrow F2 in Figure 8 , parallel to the bottom surface M2 of the cover body 211), B≥70°. The acute included angle between the second folded edge 213 and the horizontal plane M1 is θ, and θ≥0°, more preferably θ≥12°, thereby facilitating the downward guidance of oil flowing down 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 subsequent 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.

[0052] As described above, the first folded edge 212 and the second folded edge 213 are both open plate structures. The first folded edge 212 has at least two first smoke inlets 2121 arranged in the left and right directions of the range hood, and the second folded edge 213 has at least two second smoke inlets 2131 arranged in the left and right directions of the range hood. The first folded edge 212 forms a first smoke inlet part of the top smoke inlet, and the second folded edge 213 forms a second smoke inlet part 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 performance and oil fume suction effect, and on the other hand, the interval arrangement of the smoke inlets relative to the overall long strip smoke inlet arrangement has better strength, 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.

[0053] Since the first smoke inlet hole 2121 is located at the rear side of the smoke collecting cavity 2111 and below the smoke collecting cavity 2111, after part of the oil fume flows out of the smoke collecting cavity 2111 (is guided backward and downward), the oil fume flows out of the first smoke inlet hole 2121 smoothly backward, and after turning inside the first part 21, enters the fan 3 arranged in the upper cabinet 1 upward, which can reduce the loss caused by the flow direction mutation of the oil fume passing through the first smoke inlet hole 2121. A small part of the oil fume passes through the second smoke inlet hole 2131 into the second part 22, and the oil fume entering the second part 22 rises upward, and the arrangement of the second smoke inlet hole 2131 can avoid the oil fume that has not been guided to the first smoke inlet hole 2121 from accumulating in the space formed by the first folding edge 212, the second folding 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 inlet hole 2121 and the noise that may be caused thereby.

[0054] The front panel 221 of the second part 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 9 .

[0055] The fan 3 includes 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 includes 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, including a first air inlet 341 facing the rear side and a second air inlet 342 facing the front side. The first air inlet 341 is arranged on the first cover plate 311 as a main air inlet, and the second air inlet 342 is arranged on the second cover plate 312 as a secondary air inlet, forming a back suction form.

[0056] The bottom of the volute 31 is opposite to the top surface of the cover body 211, and oil liquid on the bottom of the volute 31 can drip onto the cover body 211. The bottom of the volute 31 is provided with an oil leakage nozzle 35, and a projection of the oil leakage 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 leakage nozzle 35 is located above the top plates of the cover body 211 and is located at the rear side of the highest point of the top plates of the cover body 211 to guide the oil liquid rearward. Preferably, in the embodiment, the oil leakage 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 plates of the cover body 211 through the oil leakage nozzle 35 and flows along the rear end stretching plane of the cover body 211 to the top smoke inlet.

[0057] The volute 31 is fixed to the rear side of the upper cabinet 1 through a mounting bracket 36, and the mounting bracket 36 gradually inclines downward from front to rear, so that the oil liquid accumulated on the mounting bracket 36 can be effectively guided along the inclined surface to the rear side wall surface of the upper cabinet 1, thereby avoiding the oil liquid from randomly dripping in the upper cabinet and causing an oil path risk.

[0058] The smoke collecting cover further includes a top plate 215 located above the cover body 211, and the upper cabinet 1 is connected to the top plate 215. A mounting opening can be formed in the top plate 215, and the bottom of the upper cabinet 1 extends to the mounting opening for installation of the two, and such an installation structure is the same as that of the prior art, which will not be described herein. The range hood further includes an oil guide plate 7 including an oil guide plate body 71 and flanges 72 formed on the front side and the left and right sides of the oil guide plate body 71. The oil guide plate body 71 is located at the bottom of the upper cabinet 1 and extends rearward and gradually downward from the front side bottom of the upper cabinet 1. The oil guide plate body 71 is located in the smoke collecting cover and is higher than the cover body 211. The flanges 72 are wrapped outside the front side bottom and the left and right side bottoms of the upper cabinet 1, respectively, to collect and gather the oil liquid and ensure that the oil liquid on the front side of the upper cabinet 1 can be completely collected and to a certain extent isolate the parts such as the conventional switch assembly on the front side of the smoke collecting cover from the oil path environment. The oil liquid collected by the oil guide plate 7 is guided rearward until it drips onto the top surface (upper surface) of the cover body 211 and flows rearward to the top smoke inlet. For this purpose, the rear end of the oil guide plate 7 should be located at the rear side of the highest point of the top surface of the cover body 211 on the horizontal plane M1. In the embodiment, the rear end of the oil guide plate 7 is located above the first top plate 2112.

[0059] The range hood further comprises a filter screen 6 arranged in the smoke collecting box 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 at least partially close to the upper panel 2211 of the front panel 221 so that the rear side surface of the first plate body 61 is close to the third fold edge 214, thereby the third fold edge 214 is fixed to the rear side surface of the first plate body 61. The first plate body 61 extends downward along the front panel 221 and can be close to the front panel 221. The second plate body 62 extends rearward from the lower end of the first plate body 61 to the rear panel 223 at the rear side of the second portion 22. 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 to the rear panel 223. The second plate body 62 extends gradually downward from front to rear, and the transition position between the second plate body 62 and the first plate body 61 can be formed with a bend. 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.

[0060] The second plate body 62 is provided with mesh holes 621 so that the oil fume sucked by the side smoke inlet 222 passes upward and is filtered. The mesh holes 621 can be multiple and arranged in intervals along the left-right direction of the range hood. Preferably, the mesh holes 621 are long strip-shaped flange holes, and the length direction of the mesh holes 621 is the front-rear direction of the range hood. In order to avoid the oil liquid falling from above the second plate body 62 directly dripping through the mesh holes 621 and then dripping through the side smoke inlet 222, the projection (the projection direction is shown by the arrow F1) of the front side edge of the mesh holes 621 on the horizontal plane M1 is located rearward of the projection of the lower edge of the side smoke inlet 222 on the horizontal plane M1, and is also located rearward of the projection of the lower side end of the first fold edge 212 on the horizontal plane M1, so as to avoid the oil liquid falling directly at this position of the top smoke inlet from dripping through the mesh holes 621, but dripping on the solid plate body outside the mesh holes 621. See Figure 6 The projection trajectory of the front side edge of the mesh holes 621 is shown by the dashed line M3, the projection trajectory of the lower edge of the side smoke inlet 222 is shown by the dashed line M4, and the projection trajectory of the lower side end of the first fold edge 212 is shown by the dashed line M5.

[0061] The projection of the last side of the volute 31 on the horizontal plane M1 is located forward of the projection of the front side edge of the mesh holes 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 holes 621.

[0062] The bottom of the smoke collecting box 2 is provided with an oil cup 5 which can receive the oil liquid flowing down from the smoke collecting box 2.

[0063] The oil liquid dropped from the volute 31 of the fan 3 and the oil liquid flowing from the front side of the upper box 1 reaches the top smoke inlet, part of the oil liquid flows along the rear side surface of the first folded edge 212 and the lower surface of the second folded edge 213, and then flows downward along the third folded 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, until being collected into the oil cup 5 arranged at the bottom of the smoke collecting box 2. Part of the oil liquid drops from the lower side end of the first folded edge 212, and can also be received by the second plate body 62, and since the top smoke inlet is at the top, the oil fume entering from the outside can accelerate the dripping and gathering speed of the oil liquid in this area, improve the oil liquid collection efficiency, and reduce the accumulation of oil liquid dirt in the top smoke inlet area.

[0064] The oil liquid 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 folded edge 212 and the upper surface of the second folded edge 213, passes through the second smoke inlet hole 2131 to flow along the lower surface of the second folded edge 213, part of which passes through the first smoke inlet hole 2121 to flow along the rear side surface of the first folded edge 212 and the lower surface of the second folded edge 213, and then flows downward along the third folded 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, until being collected into the oil cup 5 arranged at the bottom of the smoke collecting box 2.

[0065] The "fluid communication" referred to in the present application refers to the spatial positional relationship between two components or parts (hereinafter collectively referred to as first part and second part), i.e. the fluid (gas, liquid or mixture of the two) can flow or / and be transported from the first part to the second part along the flow path, which can be directly connected between the first part and the second part, or indirectly connected between the first part and the second part through at least one third party, which can be a fluid passage such as a pipe, channel, conduit, flow guide, hole, groove, etc., or a chamber allowing fluid flow or a combination thereof.

Claims

1. A range hood comprising a fume collecting box (2), an upper box (1) connected to the fume collecting box (2), a fan (3) arranged in the upper box (1), and an oil cup (5) arranged at the bottom of the fume collecting box (2), the fume collecting box (2) comprising: a first part (21) extending transversely, comprising a cover (211) and a top fume inlet, a fume collecting cavity (2111) being formed in the cover (211); and a second part (22) extending longitudinally below the first part (21), the second part (22) comprising a front panel (221), a side fume inlet (222) being formed on the front panel (221); the fan (3) comprising a volute (31), an oil leakage nozzle (35) being arranged at the bottom of the volute (31); characterized in that: the fume collecting cavity (2111) is at least partially located on the front side of the front panel (221) and at least partially located on the rear side of the front panel (221), the top fume inlet is located on the rear side of the front panel (221), and the oil leakage nozzle (35) is located above the cover (211) and on the rear side of the highest point of the top surface of the cover (211). the front panel (221) comprises an upper panel (2221) located above the side fume inlet (222) and a lower panel (2222) located below the side fume inlet (222); the fume collecting box (2) is provided with a filter screen (6), the filter screen (6) comprising a first plate body (61) extending downward along the rear side surface of the upper panel (2221) and a second plate body (62) extending rearward from the lower end of the first plate body (61) to the rear panel (223) on the rear side of the second part (22), the second plate body (62) extending downward and rearward gradually, the front side end of the second plate body (62) being close to the upper edge of the side fume inlet (222), and the second plate body (62) being provided with mesh holes (621). the projection of the last side of the volute (31) on a horizontal plane (M1) is located on the front side of the projection of the front side edge of the mesh holes (621) on the horizontal plane (M1). the top fume inlet comprises a first fume inlet part located on the rear side of the fume collecting cavity (2111) and below the fume collecting cavity (2111), the first part (21) further comprising a first folded edge (212) constituting the first fume inlet part, the first folded edge (212) being a perforated plate member, the first folded edge (212) extending downward from the rear side end of the cover (211), and the first folded edge (212) being directly or indirectly connected to the first plate body (61). the top fume inlet further comprises a second fume inlet part, the first part (21) further comprising a second folded edge (213) constituting the second fume inlet part, the second folded edge (213) also being a perforated plate member, the second folded edge (213) extending forward from the lower end of the first folded edge (212) to the front panel (221).

2. The hood according to claim 1, characterized in that: the included angle formed between the first folded edge (212) and the second folded edge (213) is B, and B≥90° is satisfied. ​ 3. The hood according to claim 2, characterized in that: ​ 4. The hood according to claim 2, characterized in that: ​ 5. The hood according to claim 4, characterized in that: ​ 6. The hood according to claim 5, characterized in that: ​ 7. The hood according to claim 5, characterized in that: An acute angle between the second fold (213) and the horizontal plane (M1) is θ, and θ≥12° is satisfied.

8. The hood according to claim 4, characterized in that: A projection of a front side edge of the mesh hole (621) on the horizontal plane (M1) is located at the rear side of a projection of a lower side end of the first fold (212) on the horizontal plane (M1).

9. The hood according to claim 2, characterized in that: A projection of a front side edge of the mesh hole (621) on the horizontal plane (M1) is located at the rear side of a projection of a lower edge of the side smoke inlet (222) on the horizontal plane (M1).

10. The hood according to any one of claims 1-9, characterized in that: The first part (21) further comprises a top plate (215) located above the cover body (211), and the upper cabinet (1) is connected to the top plate (215). The range hood further comprises an oil guide plate (7), and the oil guide plate (7) comprises an oil guide plate body (71) located at the bottom of the upper cabinet (1), and a rear side end of the oil guide plate body (71) is located above the cover body (211).

11. The hood according to claim 10, characterized in that: A projection of the rear side end of the oil guide plate body (71) on the horizontal plane (M1) is located at the rear side of the highest point of the top surface of the cover body (211) on the horizontal plane (M1).

12. The hood according to claim 10, characterized in that: The oil guide plate (7) further comprises a flange (72) formed on the front side and the left and right sides of the oil guide plate body (71), and the flange (72) is wrapped outside the front side bottom and the left and right side bottoms of the upper cabinet (1), respectively.

13. The hood according to any one of claims 1-9, characterized in that: The volute (31) is fixed to the rear side of the upper cabinet (1) through a mounting bracket (36), and the mounting bracket (36) gradually inclines downward from front to back.

14. The hood according to any one of claims 1-9, characterized in that: The top surface of the cover body (211) constituting the smoke collecting cavity (2111) comprises a first top plate (2112), a second top plate (2113), and a third top plate (2114), the first top plate (2112) gradually inclines downward from front to back, the second top plate (2113) gradually inclines downward from the rear side end of the first top plate (2112) to the rear, and the third top plate (2114) gradually inclines downward from the front side end of the first top plate (2112) to the front, the junction of the first top plate (2112) and the third top plate (2114) is the highest point of the top surface of the cover body (211), and the oil leakage nozzle (35) is located above the first top plate (2112).

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