Exhaust fume collecting hood and range hood applying same

Abstract

The exhaust fume collecting hood comprises a front side wall and a rear side wall which are arranged front and back in a spaced mode, a bottom plate is arranged between the bottom of the front side wall and the bottom of the rear side wall, the bottom plate is provided with a gathering part which is gathered upwards, a space below the gathering part forms an exhaust fume collecting cavity, and the exhaust fume collecting cavity is communicated with the front side wall and the rear side wall. A smoke suction opening is formed in the top of the gathering part, an oil collecting groove which is sunken downwards is formed in the part, located between the gathering part and the rear side wall, of the bottom plate, and the part, located outside the gathering part and the oil collecting groove, of the bottom plate forms a plane part; protruding parts protruding forwards are formed on the edge of the front side of the oil collecting groove and correspond to the left side and the right side of the smoke suction opening.

Description

Technical Field

[0001] The utility model relates to an oil fume purification device, in particular to a fume collecting hood and an oil fume extractor using the fume collecting hood. Background Art

[0002] Range hoods have become one of the indispensable kitchen appliances in modern families. Range hoods work based on the principle of fluid dynamics, using a centrifugal fan installed inside the range hood to absorb and exhaust oil fumes, and using a filter to filter out some grease particles.

[0003] Usually, range hoods include top suction type and side suction type. Top suction range hoods are more and more widely used due to their advantages such as being neat, light and small in space. Top suction range hoods usually include a smoke hood and a fan frame located on the smoke hood. A volute, an impeller and a motor driving the impeller are installed in the fan frame. Existing top suction range hoods, such as a range hood with enhanced structural strength of the smoke hood disclosed in Chinese patent application number 202221461819.4, include a smoke hood and an outer shell, the outer shell is arranged on the top of the smoke hood, and a fan assembly is arranged inside; a smoke inlet docking with the outer shell is provided on the top plate of the smoke hood, a first flange is provided on the top plate at the smoke inlet, and the outer shell is fixed on the first flange.

[0004] The fume hood is the part of the range hood that receives the oil and guides it into the oil cup. However, due to improper installation, the fume hood cannot remain completely horizontal, which will cause some of the oil to not flow into the oil cup and flow along the large surface of the fume hood. Figure 12, Schematic diagram of the hood body of the smoke collecting hood (hiding the top plate and the front panel of the hood body). The hood body 100 includes a front side wall 101, a rear side wall 102, a left side wall 103 and a right side wall 104. The front side wall 101 and the rear side wall 102 are arranged at intervals front and back. The left side wall 103 is arranged between the left ends of the front side wall 101 and the rear side wall 102, and the right side wall 104 is arranged between the right ends of the front side wall 101 and the rear side wall 102. The hood body 100 further includes a bottom plate 105. The bottom plate 105 is arranged between the bottoms of the above side walls. The middle of the bottom plate 105 bulges upward to form a smoke collecting cavity 106. The bottom plate 105 is recessed downward at a position close to the rear side wall 103 to form an oil collecting groove 107. The part of the bottom plate 105 outside the smoke collecting cavity 106 and the oil collecting groove 107 is a plane, that is, it constitutes the above-mentioned large plane 108. The rear side of the oil collecting groove 107 does not closely adhere to the rear side wall 102. Therefore, there is a part of the surface (small plane 109) between the rear side of the oil collecting groove 107 and the rear side wall 102, which is connected to the large plane 108 of the bottom plate 105, and the oil can spread along the small plane 109 at the rear side to the front side of the smoke collecting hood. Since electrical components or electronic components such as lighting lamps are usually arranged on the front side of the large plane 108 of the smoke collecting hood, if the oil flows forward, it will contaminate the electrical components or electronic components arranged on the front side, affecting the normal use of these components. And it is also possible to cause the oil to drip from the gap, bringing a bad user experience to the user.

[0005] Therefore, there is still room for further improvement. Summary of the Utility Model

[0006] The first technical problem to be solved by the present utility model is to provide a smoke collecting hood aiming at the deficiencies of the above-mentioned existing technologies, which can prevent the oil from spreading to the front side of the smoke collecting hood, thereby reducing the risk of oil leakage and reducing the pollution of the oil to lighting lamps, gesture switch devices, etc.

[0007] The second technical problem to be solved by the present utility model is to provide a range hood applying the above-mentioned smoke collecting hood.

[0008] The technical solution adopted by the present utility model to solve the above first technical problem is: a smoke collecting hood, including a front side wall and a rear side wall arranged at intervals front and back. A bottom plate is arranged between the bottoms of the front side wall and the rear side wall. The bottom plate has a bulging portion bulging upward. The space below the bulging portion forms a smoke collecting cavity. The top of the bulging portion forms a smoke suction port. The part of the bottom plate between the bulging portion and the rear side wall forms an oil collecting groove recessed downward. The part of the bottom plate outside the bulging portion and the oil collecting groove constitutes a flat portion; characterized in that:

[0009] A convex portion protruding forward is formed at the front side edge of the oil collecting groove, and the convex portion corresponds to the left and right sides of the smoke suction port.

[0010] By forming a convex portion protruding forward at the front side edge of the oil collecting tank, the convex portion truncates the part of the flat portion of the bottom plate located between the rear side of the raised portion and the front side edge of the oil collecting tank, thereby reducing the spread of oil along the flat surface here to the front side of the smoke collecting hood, enabling the oil to enter the oil collecting tank, further reducing the risk of oil leakage, and reducing the pollution of the oil to lighting lamps, gesture switch devices, etc.

[0011] Preferably, the convex portion is an arc-shaped convexity. The depth of the convex portion in the front-back direction is L3, the distance between the front side edge of the oil collecting tank and the rear side of the raised portion is L4, and the distance between the front side edge of the oil collecting tank and the rear side edge of the smoke suction port is L6, and L4 < L3 < L6 is satisfied to ensure that the convex portion can be located on the flat portion between the rear side of the raised portion and the front side edge of the oil collecting tank.

[0012] According to one aspect of the present invention, the rear side edge of the oil collecting tank is in close contact with the front surface of the rear side wall.

[0013] According to another aspect of the present invention, the distance between the rear side edge of the oil collecting tank and the front side of the rear side wall is A, and A > 0. An oil leakage hole is provided in the part of the flat portion between the oil collecting tank and the rear side wall, and the oil leakage hole corresponds to the left and right sides of the smoke suction port.

[0014] Preferably, the diameter of the oil leakage hole is D, and D > A is satisfied to ensure that the opening breaks the relatively narrow flat portion at the rear side.

[0015] According to another aspect of the present invention, the distance between the rear side edge of the oil collecting tank and the front side of the rear side wall is A, and A > 0. A flow guiding rib is provided on the front side of the rear side wall, and the flow guiding rib is provided on the part of the flat portion between the oil collecting tank and the rear side wall.

[0016] Preferably, the depth of the flow guiding rib in the front-back direction is L9, and L9 > A is satisfied to ensure that the flow guiding rib breaks the relatively narrow flat portion at the rear side.

[0017] The technical solution adopted by the present invention to solve the above second technical problem is: an oil fume extractor, characterized in that: the smoke collecting hood as described above is applied.

[0018] Compared with the prior art, the advantages of the present invention are: by forming a convex portion protruding forward at the front side edge of the oil collecting tank, the convex portion truncates the part of the flat portion of the bottom plate located between the rear side of the raised portion and the front side edge of the oil collecting tank, thereby reducing the spread of oil along the flat surface here to the front side of the smoke collecting hood, enabling the oil to enter the oil collecting tank, further reducing the risk of oil leakage, and reducing the pollution of the oil to lighting lamps, gesture switch devices, etc. Description of the Drawings

[0019] Figure 1 Schematic diagram of the range hood according to the first embodiment of the present utility model;

[0020] Figure 2 Schematic diagram of the smoke collecting hood of the range hood according to the first embodiment of the present utility model;

[0021] Figure 3 Three-dimensional structure schematic diagram of the hood body of the smoke collecting hood of the range hood according to the first embodiment of the present utility model;

[0022] Figure 4 Top view of the hood body of the smoke collecting hood of the range hood according to the first embodiment of the present utility model;

[0023] Figure 5 For Figure 4 Partial enlarged schematic diagram of I;

[0024] Figure 6 Top view of the hood body of the smoke collecting hood of the range hood according to the second embodiment of the present utility model;

[0025] Figure 7 For Figure 6 Partial enlarged schematic diagram of II;

[0026] Figure 8 Three-dimensional structure schematic diagram of the hood body of the smoke collecting hood of the range hood according to the third embodiment of the present utility model;

[0027] Figure 9 For Figure 8 Partial enlarged schematic diagram of III;

[0028] Figure 10 Top view of the hood body of the smoke collecting hood of the range hood according to the third embodiment of the present utility model;

[0029] Figure 11 For Figure 10 Partial enlarged schematic diagram of IV;

[0030] Figure 12 Top view of the hood body of the smoke collecting hood of the prior art range hood. Detailed description of the specific implementation

[0031] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions.

[0032] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the disclosed embodiments of the present utility model can be arranged in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to the directions opposite to or consistent with the direction of gravity. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0033] Embodiment 1

[0034] See Figures 1 to 5 , an oil fume suction machine, which includes an upper box body 1, a lower box body 2, and a smoke collecting hood 3 provided at the bottom of the lower box body 2. A fan system (not shown) can be provided in the upper box body 1. At least part of the lower box body 2 is located below the upper box body 1. The lower box body 2 covers the outer periphery of the upper box body 1 and can move up and down relative to the upper box body 1. A smoke suction port 34 is formed on the smoke collecting hood 3 so that oil fume can be sucked into the lower box body 2, enter the upper box body 1 upward, and then be discharged through the fan system 4.

[0035] The smoke collecting hood 3 includes a hood body 31, a top plate 32, and a panel 33. Among them, the hood body 31 includes a front side wall 311, a rear side wall 312, a left side wall 313, and a right side wall 314. The front side wall 311 and the rear side wall 312 are arranged at intervals front and rear. The left side wall 313 is provided between the left end parts of the front side wall 311 and the rear side wall 312. The right side wall 314 is provided between the right end parts of the front side wall 311 and the rear side wall 312. The hood body 31 further includes a bottom plate 315. The bottom plate 315 is provided between the bottoms of the above side walls. There is a raised part 3153 that bulges upward in the middle of the bottom plate 315. The space below the raised part 3153 forms a smoke collecting cavity 35. The above-mentioned smoke suction port 34 is located at the top of the raised part 3153, that is, the raised part 3153 bulges upward from the periphery to the middle and opens at the top position of the bulge to form the smoke suction port 34. The smoke suction port 34 enables the smoke collecting cavity 35 to be in fluid communication with the inside of the lower box body 2. The above-mentioned top plate 32 is provided between the tops of the side walls of the hood body 31, and the panel 33 is provided on the front side of the front side wall 311 of the hood body 31. Electrical components or electronic components such as lighting lamps and gesture switches can be provided on the front side inside the hood body 31. The above structure of the smoke collecting hood 3 is the prior art.

[0036] A part of the bottom plate 315 between the raised part 3153 and the rear side wall 312 forms an oil collecting groove 3151 that is recessed downward. The part of the bottom plate 315 outside the raised part 3153 and the oil collecting groove 3151 is a flat part 3152 (referring to the part whose upper surface is a horizontal plane). The rear side edge of the oil collecting groove 3151 is in a tight state with the front side surface of the rear side wall 312 of the cover body 31, that is, the distance between the two is 0, thus avoiding a narrow horizontal plane between the rear side edge of the oil collecting groove 3151 and the rear side wall 312 from being connected to the flat part 3152, thereby reducing the spread of oil to the front side of the smoke collecting hood 3.

[0037] In addition, a convex part 3154 that protrudes forward is formed at the front side edge of the oil collecting groove 3151. Thus, the convex part 3154 cuts off the part of the flat part 3152 between the rear side of the raised part 3153 and the front side edge of the oil collecting groove 3151, thereby reducing the spread of oil along the small plane here to the front side of the smoke collecting hood 3. There may be two convex parts 3154, corresponding to the left and right sides of the smoking port 34 respectively.

[0038] The distance between the convex part 3154 and the corresponding side edge of the smoking port 34 is L1. The convex part 3154 can be an arc-shaped convexity. When measuring the distance, it is based on the end closest to the smoking port 34. And it satisfies L1 > 0mm. The width of the convex part 3154 in the left-right direction is L2, the depth of the convex part 3154 in the front-back direction is L3, the distance between the front side edge of the oil collecting groove 3151 and the rear side of the raised part 3153 is L4, and the distance between the front side edge of the oil collecting groove 3151 and the rear side edge of the smoking port 34 is L6. And it satisfies L4 < L3 < L6 to ensure that the convex part 3154 can be located in the flat part 3152 between the rear side of the raised part 3153 and the front side edge of the oil collecting groove 3151; L3 < L6 to make the lower side of the smoke collecting hood 3 more beautiful, L5 > L2, preferably L5 > 2*L2. The bottom of the raised part 3153 is configured to be approximately rectangular, and the four corner parts of the rectangle are respectively formed as rounded corners. The positions corresponding to the two rounded corners at the rear side of the raised part 3153 of the front side edge of the oil collecting groove 3151 are also formed as rounded corners. The above-mentioned L5 refers to the distance between the end of the convex part 3154 close to the smoking port 34 and the starting point of the rounded corner of the corresponding front side edge of the oil collecting groove 3151.

[0039] Embodiment Two

[0040] See Figure 6 and Figure 7, in this embodiment, the difference from the above-mentioned first embodiment is that the rear side edge of the oil collecting groove 3151 and the front surface of the rear side wall 312 of the cover body 31 are not in a tightly attached state, that is, the distance between the two is A, and A>0 is satisfied. An oil leakage hole 3155 is provided in the part of the bottom plate 315 between the oil collecting groove 3151 and the rear side wall 312, so that the oil dripping between the oil collecting groove 3151 and the rear side wall 312 flows downward through the oil leakage hole 3155 and then flows into the oil cup (not shown) of the range hood.

[0041] The oil leakage holes 3155 are provided at positions corresponding to the left and right sides of the smoke suction port 34. The distance between the oil leakage holes 3155 and the corresponding side edge of the smoke suction port 34 is L7, and L7>0. The diameter of the oil leakage hole 3155 is D, and D>A is satisfied, that is, it is ensured that the relatively narrow planar part 3152 at the rear side of the opening is interrupted.

[0042] Embodiment Three

[0043] See Figures 8 to 11 , in this embodiment, the difference from the above-mentioned second embodiment is that the diversion rib 36 is used to replace the above-mentioned oil leakage hole 3155. The diversion rib 36 is provided on the front side of the rear side wall 312 and extends from the rear side wall 312 towards the oil collecting groove 3151, that is, the diversion rib 36 is provided on the part of the planar part 3152 between the oil collecting groove 3151 and the rear side wall 312. Thus, the diversion rib 36 intercepts the oil dripping on the part between the oil collecting groove 3151 and the rear side wall 312 and allows it to flow into the oil collecting groove 3151.

[0044] Similarly, the diversion ribs 36 are provided at positions corresponding to the left and right sides of the smoke suction port 34. The distance between the diversion ribs 36 and the corresponding side edge of the smoke suction port 34 is L8, and L8>0. The depth of the diversion rib 36 in the front-rear direction is L9, and L9>A is satisfied, that is, it is ensured that the relatively narrow planar part 3152 at the rear side of the diversion rib 36 is interrupted.

Claims

1. A smoke collecting hood, comprising a front side wall (311) and a rear side wall (312) arranged in a front-to-back manner, a bottom plate (315) being arranged between the bottoms of the front side wall (311) and the rear side wall (312), the bottom plate (315) having an upwardly raised portion (3153), the space below the raised portion (3153) constituting a smoke collecting chamber (35), the top of the raised portion (3153) constituting a smoking port (34), a portion of the bottom plate (315) located between the raised portion (3153) and the rear side wall (312) being formed with a downwardly recessed oil collecting groove (3151), and a portion of the bottom plate (315) located outside the raised portion (3153) and the oil collecting groove (3151) constituting a flat portion (3152); characterized in that: A convex portion (3154) protruding forward is formed on the front edge of the oil collecting groove (3151), and the convex portion (3154) corresponds to the left and right sides of the smoking port (34).

2. The smoke collecting hood according to claim 1, characterized in that: The protrusion (3154) is an arc-shaped protrusion, and the depth of the protrusion (3154) in the front-to-back direction is L3. The distance between the front edge of the oil collecting groove (3151) and the rear side of the raised portion (3153) is L4. The distance between the front edge of the oil collecting groove (3151) and the rear edge of the smoking port (34) is L6, and L4<L3<L6 is satisfied.

3. The smoke collecting hood according to claim 1 or 2, characterized in that: The rear edge of the oil collecting groove (3151) is in close contact with the front surface of the rear side wall (312).

4. The smoke collecting hood according to claim 1 or 2, characterized in that: The distance between the rear edge of the oil collecting groove (3151) and the front side of the rear side wall (312) is A, and A>0. The plane portion (3152) is provided with an oil leakage hole (3155) between the oil collecting groove (3151) and the rear side wall (312), and the oil leakage hole (3155) corresponds to the left and right sides of the smoking port (34).

5. The smoke collecting hood according to claim 4, characterized in that: The diameter of the oil leakage hole (3155) is D, and satisfies D>A.

6. The smoke collecting hood according to claim 1 or 2, characterized in that: The distance between the rear edge of the oil collecting groove (3151) and the front side of the rear side wall (312) is A, and A>0. The front side of the rear side wall (312) is provided with a guide rib (36), and the guide rib (36) is provided on the portion of the plane portion (3152) between the oil collecting groove (3151) and the rear side wall (312).

7. The smoke collecting hood according to claim 6, characterized in that: The depth of the guide rib (36) in the front-to-back direction is L9, and satisfies L9>A.

8. A range hood, characterized in that: The invention is applied with the fume hood as claimed in any one of claims 1 to 7.

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