Range hood
By designing a smoke-collapse board assembly in the range hood, including the first smoke-collapse board, the second smoke-collapse board and the third smoke-collapse board, forming a second cigarette inlet and setting a first cigarette inlet, the problem of excessively long smoke intake path is solved, and the smoking effect and user health are improved.
Patent Information
- Application Number
- CN202422380700.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-09-27
AI Technical Summary
The fume intake path of existing side-sucking range hoods is long, which can easily cause the fume to be sucked by the user during the flow, affecting the cooking comfort and health.
A range hood is designed, and a smoke-closing board assembly including a first smoke-closing board, a second smoke-closing board and a third smoke-closing board are arranged at an obtuse angle to form a second smoke inlet, and a first smoke-inlet is provided on the first smoke-closing board to shorten the oil smoke intake path and reduce the escape of oil smoke.
Effectively shorten the intake path of the oil fume, reduce the possibility of the oil fume being sucked by the user during the flow, and improve the smoking effect and overall performance of the range hood.
Smart Images
Figure CN223165610U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of range hoods, in particular to a range hood. Background Art
[0002] As modern kitchen environments continue to improve, range hoods, as a crucial appliance in the kitchen, have a direct impact on the comfort and health of home cooking. Side-suction range hoods, with their unique side-suction design, have garnered widespread attention in the market in recent years. However, despite their superior fume extraction performance, side-suction range hoods, due to their tilted side panels, place the intake closer to the back panel and require the fume to float to the top before being inhaled. This results in a longer fume inhalation path, which can lead to the user inhaling the fume as it flows. Utility Model Content
[0003] The main purpose of the utility model is to provide a range hood, aiming to solve the technical problem that the oil smoke inhalation path of the range hood is long and the oil smoke is easily inhaled by the user during the flow process.
[0004] To achieve the above-mentioned purpose, the range hood proposed in the present invention comprises a housing, wherein the housing comprises a top plate, a front plate, a back plate and a smoke collecting plate assembly located below the top plate: the front plate and the back plate are respectively connected to the front and rear ends of the top plate, and the smoke collecting plate assembly, the top plate, the front plate and the back plate enclose an oil fume processing chamber; wherein,
[0005] The cigarette collecting plate assembly includes a first cigarette collecting plate, a second cigarette collecting plate and a third cigarette collecting plate, one end of the first cigarette collecting plate is connected to the front panel, the second cigarette collecting plate is arranged behind the first cigarette collecting plate, and the third cigarette collecting plate is arranged at the rear and lower part of the second cigarette collecting plate and is connected to the back panel; the first cigarette collecting plate, the second cigarette collecting plate and the third cigarette collecting plate are combined to form a cigarette collecting chamber, and the inner plate surface of the second cigarette collecting plate and the inner plate surface of the third cigarette collecting plate are arranged at an obtuse angle; a first cigarette collecting port is opened on the first cigarette collecting plate, and a second cigarette collecting port is formed between the second cigarette collecting plate and the third cigarette collecting plate.
[0006] Optionally, the second cigarette collecting plate is arranged in the longitudinal direction, and the outer plate surface of the first cigarette collecting plate and the outer plate surface of the second cigarette collecting plate are arranged at an acute angle.
[0007] Optionally, the casing also includes side panels connected to the front and rear sides of the top panel, and the left and right ends of the first smoke collecting plate, the second smoke collecting plate and the third smoke collecting plate extend to the two side panels; the second smoke collecting plate, the third smoke collecting plate and the two side panels form the second smoke inlet.
[0008] Optionally, the casing further includes a deflector plate located in the oil fume treatment cavity. The deflector plate corresponds to the second smoke inlet and is inclined downward and backward to guide the oil fume flowing in through the second smoke inlet.
[0009] Optionally, the casing further includes a first connecting plate located above the second smoke collecting plate. The front end of the first connecting plate is connected to the rear end of the first smoke collecting plate, and the two form an included angle. The left and right ends of the first connecting plate are connected to the two side plates; the front end of the deflector plate is connected to the first connecting plate;
[0010] The left and right ends of the second smoke collecting plate are connected to the two side plates, and the upper end of the second smoke collecting plate is spaced from the first connecting plate to form a smoke inlet gap.
[0011] Optionally, the casing further includes a second connecting plate located between the top plate and the first smoke collecting plate. The lower end of the second connecting plate is connected to the rear end of the first smoke collecting plate, and the upper end is connected to the top plate. A smoke passing hole is provided on the second connecting plate.
[0012] Optionally, the casing further includes a third connecting plate. The third connecting plate includes an inclined connecting section and a horizontal section connected to each other in the front-rear direction. The rear end of the horizontal section is connected to the lower end of the back plate and encloses an oil receiving cavity with the back plate. The front end of the inclined connecting section is connected to the rear end of the third smoke collecting plate.
[0013] Optionally, the inclined connecting section includes a first inclined section and a second inclined section connected to each other in the front-rear direction. The front end of the first inclined section is connected to the rear end of the third smoke collecting plate, and the rear end of the second inclined section is connected to the front end of the horizontal section; the outer plate surfaces of the first inclined section and the second inclined section form an obtuse angle.
[0014] Optionally, the casing further includes a fourth connecting plate. The lower end of the fourth connecting plate is connected to the lower end of the front panel, and the upper end is connected to the front end of the first smoke collecting plate. The outer plate surface of the fourth connecting plate forms an obtuse angle with the outer plate surface of the first smoke collecting plate; a plurality of smoke inlet holes communicating with the oil fume treatment cavity are provided on the fourth connecting plate.
[0015] Optionally, the range hood further includes a detachable component provided in the oil fume treatment cavity. The detachable component corresponds to the second smoke inlet and can be disassembled and assembled through the second smoke inlet.
[0016] The range hood of the present utility model is configured such that the smoke collecting plate assembly includes a first smoke collecting plate, a second smoke collecting plate, and a third smoke collecting plate, and the second smoke collecting plate is arranged at an angle with both the first smoke collecting plate and the third smoke collecting plate, and a second smoke inlet is formed between the second smoke collecting plate and the third smoke collecting plate. Compared with the existing solution in the market where only one smoke collecting plate is used to connect the top smoke collecting plate of the back panel and the back panel, in this application, the second smoke inlet is placed in the front, and the angle between the second smoke inlet and the horizontal plane is smaller. Thus, the smoke inlet path is changed, enabling the oil fume to be sucked in by the second smoke inlet without floating to the top and rear of the range hood, shortening the smoke suction path, and effectively preventing the user from inhaling the oil fume during its long flow path. At the same time, due to the provision of the front panel, the first smoke collecting plate is connected to the front panel, and a first smoke inlet is provided on the first smoke collecting plate. Then, the oil fume that is not sucked in by the second smoke inlet can be directly sucked in by the first smoke inlet, effectively reducing oil fume escape and enhancing the smoking effect of the entire range hood. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.
[0018] Figure 1 FIG. is a schematic structural diagram of an embodiment of the range hood of the present utility model;
[0019] Figure 2 FIG. is a structural sectional view of an embodiment of the range hood of the present utility model;
[0020] Figure 3 FIG. is a sectional schematic view of an embodiment of the range hood of the present utility model.
[0021] Explanation of the reference numerals in the drawings:
[0022]
[0023]
[0024] The realization of the object, functional features, and advantages of the present utility model will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.
[0026] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.
[0027] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.
[0028] The present utility model provides a range hood.
[0029] In the embodiments of the present utility model, as Figures 1 to 3 shown, the range hood includes a housing, and the housing includes a top plate 110, a front panel 120, a back panel 130, and a smoke collecting plate assembly located below the top plate 110: the front panel 120 and the back panel 130 are respectively connected to the front and rear ends of the top plate 110, and the smoke collecting plate assembly and the top plate 110, the front panel 120, and the back panel 130 enclose a fume treatment chamber 150.
[0030] The casing is used to provide installation and protection for the filter net assembly, purification assembly, etc., and form the overall appearance of the range hood. The casing includes a top plate 110, a front panel 120, a back panel 130 and a smoke collecting plate assembly, so that the overall casing is in a frame structure. It should be noted that the top plate 110, the front panel 120, and the back panel 130 can be separately formed plate members, which are connected to each other by welding, or they can be integrally formed frames. The smoke collecting plate assembly and the top plate 110, the front panel 120, and the back panel 130 enclose a fume treatment chamber 150, and a filter net assembly, a purification assembly, etc. can be installed in the fume treatment chamber 150 to filter and purify the fumes entering the casing. The fan structure can be arranged in the fume treatment chamber 150 or outside the casing. By additionally arranging a box structure to install the fan structure, it is only necessary to ensure that the fan can suck the fumes from the smoke inlet into the fume treatment chamber 150 for treatment. The smoke collecting plate assembly changes the flow direction of the fumes, making the fumes enter the negative pressure area of the range hood more smoothly, which helps to improve the smoking effect of the range hood and ensure that the fumes generated during cooking can be sucked away in a timely and effective manner.
[0031] Further, the smoke collecting plate assembly includes a first smoke collecting plate 141, a second smoke collecting plate 143 and a third smoke collecting plate 144. One end of the first smoke collecting plate 141 is connected to the front panel 120. The second smoke collecting plate 143 is arranged behind the first smoke collecting plate 141. The third smoke collecting plate 144 is arranged at the rear lower part of the second smoke collecting plate 143 and is connected to the back panel 130. The first smoke collecting plate 141, the second smoke collecting plate 143 and the third smoke collecting plate 144 enclose a smoke collecting chamber 145, and the inner plate surface of the second smoke collecting plate 143 and the inner plate surface of the third smoke collecting plate 144 are arranged at an obtuse angle. A first smoke inlet 142 is opened on the first smoke collecting plate 141, and a second smoke inlet 146 is formed between the second smoke collecting plate 143 and the third smoke collecting plate 144.
[0032] In this embodiment, the first smoke collecting plate 141 is connected to the lower end of the front panel 120. By setting the front panel 120 to connect the first smoke collecting plate 141, the first smoke collecting plate 141 can be spaced from the top plate 110 to enclose a part of the fume treatment chamber 150. For the convenience of description, the part of the fume treatment chamber 150 enclosed by the first smoke collecting plate 141 and the top plate 110 is defined as the first treatment chamber, and the part of the fume treatment chamber 150 enclosed by the second smoke collecting plate 143, the third smoke collecting plate 144 and the top plate 110 and the back panel 130 is defined as the second treatment chamber. Then, by opening the first smoke inlet 142 on the first smoke collecting plate 141, the fumes rising to the top can be sucked into the first treatment chamber through the first smoke inlet 142.
[0033] The second smoke collecting plate 143 is arranged behind the first smoke collecting plate 141, and the third smoke collecting plate 144 is arranged at the lower rear of the second smoke collecting plate 143. The first smoke collecting plate 141, the second smoke collecting plate 143, and the third smoke collecting plate 144 enclose a smoke collecting cavity 145, so that the oil fume generated in the kitchen can be effectively concentrated, the escape of oil fume is reduced, and the oil fume can more fully contact the negative pressure area generated by the fan, which helps the oil fume to be more efficiently absorbed and purified by the range hood, thus avoiding the extensive diffusion and retention of oil fume in the kitchen.
[0034] It can be understood that the inner plate surface of the second smoke collecting plate 143 and the inner plate surface of the third smoke collecting plate 144 are arranged at an obtuse angle, so that the outer plate surface of the second smoke collecting plate 143 and the outer plate surface of the third smoke collecting plate 144 form an angle greater than 180 degrees. At present, on the market, only a whole inclined side smoke collecting plate is used to connect the top smoke collecting plate and the back plate 130, and a smoke inlet is opened on this side smoke collecting plate. In this application, two side smoke collecting plates are provided, and the outer plate surface of the second smoke collecting plate 143 and the outer plate surface of the third smoke collecting plate 144 form an angle greater than 180 degrees. Compared with a single inclined side smoke collecting plate as a whole, the second smoke inlet 146 between the second smoke collecting plate 143 and the third smoke collecting plate 144 can be placed forward.
[0035] In the range hood of the present utility model, the smoke collecting plate assembly includes a first smoke collecting plate 141, a second smoke collecting plate 143, and a third smoke collecting plate 144. The inner plate surface of the second smoke collecting plate 143 and the inner plate surface of the third smoke collecting plate 144 are arranged at an obtuse angle, and a second smoke inlet 146 is formed between the second smoke collecting plate 143 and the third smoke collecting plate 144. Compared with the solution on the market at present where only a single smoke collecting plate is used to connect the back plate 130 and the top smoke collecting plate, in this application, the second smoke inlet 146 is placed forward, and the angle between the second smoke inlet 146 and the horizontal plane is smaller. In this way, the smoke inlet path is changed, so that the oil fume can be sucked in by the second smoke inlet 146 without floating to the top and rear of the range hood, shortening the smoke suction path, and effectively avoiding the situation that the oil fume is absorbed by the user during the long smoke suction path. At the same time, due to the provision of the front panel 120, the first smoke collecting plate 141 is connected to the front panel 120, and a first smoke inlet 142 is opened on the first smoke collecting plate 141. Then, the oil fume not sucked in by the second smoke inlet 146 can be directly sucked in by the first smoke inlet 142, effectively reducing the escape of oil fume and improving the smoking effect of the entire range hood.
[0036] In an embodiment, the second smoke collecting plate 143 is arranged longitudinally, and the outer plate surface of the first smoke collecting plate 141 and the outer plate surface of the second smoke collecting plate 143 are arranged at an acute angle.
[0037] The second smoke collecting plate 143 is arranged longitudinally. Compared with the solution of tilting the second smoke collecting plate 143 forward so that the inner plate surface of the second smoke collecting plate 143 forms an obtuse angle with the inner plate surface of the third smoke collecting plate 144, the front occupied space of the second smoke collecting plate 143 can be reduced. While ensuring the front position of the second air inlet 146, the space of the smoke collecting cavity 145 formed by enclosing the smoke collecting plate assembly is larger. At the same time, the wind resistance of the second smoke collecting plate 143 to the suction of oil fume can also be reduced. And making the outer plate surface of the first smoke collecting plate 141 form an acute angle with the outer plate surface of the second smoke collecting plate 143, the rear end of the first smoke collecting plate 141 is inclined upward, which can improve the smoke collecting effect between the first smoke collecting plate 141 and the second smoke collecting plate 143.
[0038] In an embodiment, the casing further includes side plates 161 connected to the front and rear sides of the top plate 110. The left and right ends of the first smoke collecting plate 141, the second smoke collecting plate 143, and the third smoke collecting plate 144 all extend to the two side plates 161; a second air inlet 146 is formed by enclosing between the second smoke collecting plate 143, the third smoke collecting plate 144, and the two side plates 161.
[0039] In this embodiment, the two side plates 161, the top plate 110, the front panel 120, the back panel 130, and the smoke collecting plate assembly jointly enclose a fume treatment cavity 150. Making the left and right ends of the second smoke collecting plate 143 and the third smoke collecting plate 144 both extend to the two side plates 161, then the second air inlet 146 formed by the interval between the second smoke collecting plate 143 and the third smoke collecting plate 144 also extends in the left-right direction, which can maximize the length of the second air inlet 146 to improve the overall smoking efficiency.
[0040] Further, the casing further includes a deflector plate 162 located in the fume treatment cavity 150. The deflector plate 162 corresponds to the second air inlet 146 and is inclined downward and backward from top to bottom for deflecting the oil fume flowing in from the second air inlet 146. Making the deflector plate 162 correspond to the second air inlet 146, the deflector plate 162 can deflect the oil fume flowing in from the second air inlet 146. For example, the inhaled oil fume can be deflected to the filter screen assembly for filtering, cleaning, purifying, etc. of the oil fume.
[0041] Further, the casing further includes a first connecting plate 171 located above the second smoke collecting plate 143. The front end of the first connecting plate 171 is connected to the rear end of the first smoke collecting plate 141 and the two are arranged at an angle. The left and right ends of the first connecting plate 171 are connected to the two side plates 161; the front end of the deflector plate 162 is connected to the first connecting plate 171;
[0042] The left and right ends of the second smoke collecting plate 143 are connected to the two side plates 161, and the upper end of the second smoke collecting plate 143 is spaced from the first connecting plate 171 to form a smoke inlet gap.
[0043] In this embodiment, the front end of the deflector plate 162 can be specifically connected to the first connecting plate 171 through an adapter plate, or the front end of the deflector plate 162 can be directly connected to the first connecting plate 171. The first connecting plate 171 extends substantially in the horizontal direction, and the outer plate surface of the first connecting plate 171 is provided at an obtuse angle with the outer surface of the first smoke collecting plate 141. The left and right ends of the second smoke collecting plate 143 are connected to the two side plates 161, and the upper end of the second smoke collecting plate 143 is spaced from the first connecting plate 171 to form a smoke inlet gap. In this way, the oil fume flowing through the surface of the first smoke collecting plate 141 and not sucked into the first smoke inlet 142 can enter the oil fume treatment chamber 150 through this smoke inlet gap, which can further improve the smoking efficiency of the whole machine.
[0044] In one embodiment, the casing further includes a second connecting plate 172 located between the top plate 110 and the first smoke collecting plate 141. The lower end of the second connecting plate 172 is connected to the rear end of the first smoke collecting plate 141, and the upper end is connected to the top plate 110. A smoke passing hole 173 is formed in the second connecting plate 172.
[0045] In this embodiment, by providing the second connecting plate 172 to connect the first smoke collecting plate 141 and the top plate 110, the distance between the rear end of the first smoke collecting plate 141 and the top plate 110 can be increased, and further the spatial dimension of the oil fume treatment chamber 150 formed by enclosing between the first smoke collecting plate 141 and the top plate 110 can be increased. The smoke passing holes on the second connecting plate 172 can be provided with one or more, and their sizes and shapes can also be selected and designed according to actual needs, and are not specifically limited here. By providing the smoke passing hole 173, the oil fume sucked in from the first smoke inlet 142 can enter the oil fume treatment chamber 150 between the second smoke collecting plate 143 and the back plate 130 through the smoke passing hole and be sucked out uniformly, so as to improve the oil fume treatment rate in the oil fume treatment chamber 150.
[0046] In one embodiment, the casing further includes a third connecting plate 180. The third connecting plate 180 includes an inclined connecting section 181 and a horizontal section 184 that are connected to each other in the front-rear direction. The rear end of the horizontal section 184 is connected to the lower end of the back plate 130 and encloses an oil receiving cavity 185 with the back plate 130. The front end of the inclined connecting section 181 is connected to the rear end of the third smoke collecting plate 144.
[0047] In this embodiment, the third connecting plate 180 includes a horizontal section 184 and an inclined connecting section 181. Compared with the whole inclination of the third connecting plate 180, the setting of the horizontal section 184 can increase the space between the inner plate surface of the third connecting plate 180 and the back plate 130, so that the horizontal section 184 and the back plate 130 can enclose an oil receiving cavity 185. Furthermore, there is no need to additionally provide an oil cup, which can simplify the overall structure of the machine. It can be understood that a sewage outlet communicating with the oil receiving cavity 185 is also provided on the horizontal section 184 for discharging the oil and dirt in the oil receiving cavity 185.
[0048] Further, the inclined connecting section 181 includes a first inclined section 182 and a second inclined section 183 which are connected to each other in the front-rear direction. The front end of the first inclined section 182 is connected to the rear end of the third smoke collecting plate 144, and the rear end of the second inclined section 183 is connected to the front end of the horizontal section 184; the outer plate surfaces of the first inclined section 182 and the second inclined section 183 are arranged at an obtuse angle.
[0049] In this embodiment, the inclined connecting section 181 includes a first inclined section 182 and a second inclined section 183 which are connected to each other in the front-rear direction, and the outer plate surfaces of the first inclined section 182 and the second inclined section 183 are arranged at an obtuse angle. Compared with the overall inclination of the inclined connecting section 181 at the same angle, the connection part of the outer plate surfaces of the first inclined section 182 and the second inclined section 183 can be concave. On the one hand, it reduces the external occupied space, and on the other hand, the second inclined section 183 can enclose the oil receiving cavity 185 together with the horizontal section 184 and the back plate 130, avoiding oil and dirt from polluting the first inclined section 182.
[0050] In one embodiment, the machine shell further includes a fourth connecting plate 190. The lower end of the fourth connecting plate 190 is connected to the lower end of the front panel 120, the upper end of the fourth connecting plate 190 is connected to the front end of the first smoke collecting plate 141, and the outer plate surface of the fourth connecting plate 190 and the outer plate surface of the first smoke collecting plate 141 are arranged at an obtuse angle; a plurality of smoke inlet holes 191 communicating with the oil fume treatment cavity 150 are formed in the fourth connecting plate 190.
[0051] In this embodiment, by providing the fourth connecting plate 190, the connection part between the first smoke collecting plate 141 and the outer plate surface of the fourth connecting plate 190 can be relatively concave, so that the smoke collecting space of the first smoke collecting plate 141 can be increased to improve the smoke collecting effect. And a plurality of smoke inlet holes 191 communicating with the oil fume treatment cavity 150 are formed in the fourth connecting plate 190, so that the oil fume staying at the fourth connecting plate 190 can also be sucked into the oil fume treatment cavity 150 through the plurality of smoke inlet holes 191, further improving the smoking efficiency and smoking effect of the whole machine.
[0052] In one embodiment, the range hood further includes a detachable component 200 disposed in the oil fume treatment cavity 150. The detachable component 200 is disposed corresponding to the second smoke inlet 146 and can be disassembled and assembled via the second smoke inlet 146. Specifically, the detachable component 200 can be a filter screen assembly, a cleaner containing bottle, etc. In this way, the user can directly reach into the oil fume treatment cavity 150 through the second smoke inlet 146 to disassemble, assemble and replace the detachable component 200, without opening the range hood for replacement, improving the operation convenience and greatly saving the replacement efficiency of the detachable component 200.
[0053] It should be noted that the connection between the boards described in this application can be achieved by welding, plugging or other means between the boards, or by integrally formed connection.
[0054] The above are only the optional embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. An oil fume suction machine, characterized in that, It includes a casing, and the casing includes a top plate, a front panel, a back panel, and a smoke collecting plate assembly located below the top plate: the front panel and the back panel are respectively connected to the front and rear ends of the top plate, and the smoke collecting plate assembly and the top plate, the front panel, and the back panel enclose an oil fume treatment chamber; wherein, The smoke collecting plate assembly includes a first smoke collecting plate, a second smoke collecting plate, and a third smoke collecting plate. One end of the first smoke collecting plate is connected to the front panel. The second smoke collecting plate is arranged behind the first smoke collecting plate. The third smoke collecting plate is arranged behind and below the second smoke collecting plate and is connected to the back panel. The first smoke collecting plate, the second smoke collecting plate, and the third smoke collecting plate enclose a smoke collecting chamber, and the inner plate surface of the second smoke collecting plate and the inner plate surface of the third smoke collecting plate are arranged at an obtuse angle. A first smoke inlet is formed on the first smoke collecting plate, and a second smoke inlet is formed between the second smoke collecting plate and the third smoke collecting plate.
2. The range hood according to claim 1, wherein, The second smoke collecting plate is arranged longitudinally, and the outer plate surface of the first smoke collecting plate and the outer plate surface of the second smoke collecting plate are arranged at an acute angle.
3. The range hood according to claim 2, wherein, The casing further includes side plates connected to the front and rear sides of the top plate. The left and right ends of the first smoke collecting plate, the second smoke collecting plate, and the third smoke collecting plate all extend to the two side plates. The second smoke collecting plate, the third smoke collecting plate, and the two side plates enclose the second smoke inlet.
4. The range hood according to claim 3, characterized in that, The casing further includes a guide plate located in the oil fume treatment chamber. The guide plate corresponds to the second smoke inlet and is inclined from top to bottom and backward for guiding the oil fume flowing in from the second smoke inlet.
5. The range hood according to claim 4, characterized in that, The casing further includes a first connecting plate located above the second smoke collecting plate. The front end of the first connecting plate is connected to the rear end of the first smoke collecting plate and they are arranged at an angle. The left and right ends of the first connecting plate are connected to the two side plates. The front end of the guide plate is connected to the first connecting plate. The left and right ends of the second smoke collecting plate are connected to the two side plates, and the upper end of the second smoke collecting plate is arranged at an interval from the first connecting plate to form a smoke inlet gap.
6. The range hood according to claim 1, wherein, The casing further includes a second connecting plate located between the top plate and the first smoke collecting plate. The lower end of the second connecting plate is connected to the rear end of the first smoke collecting plate, and the upper end is connected to the top plate. A smoke passing hole is formed on the second connecting plate.
7. The range hood according to any one of claims 1 to 6, characterized in that, The casing further includes a third connecting plate. The third connecting plate includes an inclined connecting section and a horizontal section connected to each other in the front-rear direction. The rear end of the horizontal section is connected to the lower end of the back panel and encloses an oil receiving chamber with the back panel. The front end of the inclined connecting section is connected to the rear end of the third smoke collecting plate.
8. The range hood according to claim 7, wherein, The inclined connecting section includes a first inclined section and a second inclined section connected to each other in the front-rear direction. The front end of the first inclined section is connected to the rear end of the third smoke collecting plate, and the rear end of the second inclined section is connected to the front end of the horizontal section. The outer plate surface of the first inclined section and the outer plate surface of the second inclined section are arranged at an obtuse angle.
9. The range hood according to any one of claims 1 to 6, characterized in that, The casing further includes a fourth connecting plate, the lower end of the fourth connecting plate is connected to the lower end of the front panel, the upper end of the fourth connecting plate is connected to the front end of the first smoke collecting plate, and the outer plate surface of the fourth connecting plate and the outer plate surface of the first smoke collecting plate are arranged at an obtuse angle; a plurality of smoke inlet holes communicating with the oil fume treatment cavity are formed in the fourth connecting plate.
10. The range hood according to any one of claims 1 to 6, characterized in that, The range hood further includes a detachable component disposed in the oil fume treatment cavity, the detachable component is disposed corresponding to the second smoke inlet, and can be disassembled and assembled through the second smoke inlet.