Oil guide structure and range hood thereof

Abstract

The utility model discloses an oil guide structure, which comprises a box body assembly, an oil guide pipe assembly and an oil guide pipe assembly, and is characterized in that the box body assembly is provided with side plates; the side plate is installed on the base, the oil blocking piece is installed at the lower end of the inner surface of the side plate, an oil guiding groove with an upward opening is formed in the oil blocking piece or between the oil blocking piece and the side plate, a convex arc-shaped air guiding face and / or an open hole are / is formed in the face, away from the oil guiding groove, of the oil blocking piece, and the open hole is communicated with the oil guiding groove. According to the oil guide structure, oil stains on the side plates are guided into the exhaust fume collecting hood, and noise of the whole machine can be prevented from being influenced by turbulent flow. The utility model further provides the range hood.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, in particular to an oil guide structure and a range hood thereof. Background Art

[0002] In existing range hoods, condensed oil on the outer surface of the hood can flow into the oil cup. When the oil cup is removed and the cleaning water cup is installed to start the automatic cleaning function, the condensed oil on the outer surface of the machine needs to be cleaned to prevent the oil from flowing into the water cup cleaning area and polluting the clean water. Secondly, the flow direction of the oil inside the whole machine needs to be considered to prevent the internal oil from continuing to flow to the outside of the whole machine during the cleaning function, thereby avoiding polluting the clean water area of ​​the water cup. Summary of the invention

[0003] The utility model aims to solve at least one of the problems existing in the existing related technologies to a certain extent. To this end, the utility model proposes an oil guide structure, which has a simple structure and can guide the oil on the side plate to the inside of the smoke hood, and can avoid turbulence that affects the noise of the whole machine. The utility model also provides a range hood.

[0004] According to the above-mentioned oil guide structure, it is realized by the following technical solution:

[0005] An oil guide structure comprises: a box assembly, the box assembly having a side plate; and an oil baffle installed at the lower end of the inner surface of the side plate, an upwardly open oil guide groove is formed on the oil baffle or between the oil baffle and the side plate, and an outwardly convex arc-shaped air guide surface and / or an opening is formed on a side of the oil baffle facing away from the oil guide groove, and the opening is communicated with the oil guide groove.

[0006] In some embodiments, the oil baffle includes an oil guide plate, which is installed at the lower end of the inner surface of the side plate, and an upward-opening oil guide groove is formed on the oil guide plate or between the oil guide plate and the side plate, and an outwardly convex arc-shaped air guide surface and / or an opening is formed on the side of the oil guide plate facing away from the oil guide groove, and the opening is connected to the oil guide groove.

[0007] In some embodiments, the openings include a plurality of first strip holes and / or a plurality of second strip holes arranged at intervals along the length direction of the oil guide plate, the first strip holes are arranged vertically and pass through the upper and lower ends of the oil guide plate, and the second strip holes are arranged horizontally or vertically and pass through the lower end of the oil guide plate.

[0008] In some embodiments, the first strip-shaped holes and the second strip-shaped holes are arranged alternately along the length direction of the oil guide plate.

[0009] In some embodiments, a second convex bump extending toward the side plate is fixedly provided at the upper end of the oil guide plate, and a free end of the second convex bump is abutted against or connected to the inner surface of the side plate.

[0010] In some embodiments, the oil baffle further includes a mounting plate, which is disposed below the oil guide plate and fits against an inner surface of the side plate, and the oil guide plate is connected to the side plate via the mounting plate.

[0011] In some embodiments, the mounting plate is provided with a plurality of positioning holes and / or a plurality of notches, and the side plates are provided with positioning protrusions at positions corresponding to the positioning holes and inserted into the positioning holes.

[0012] In some embodiments, all of the positioning holes are spaced apart along the length direction of the mounting plate; the notch is disposed at the lower end of the mounting plate, and is in any one of an inverted "V", an inverted "U" or an "M" shape.

[0013] In some embodiments, the oil baffle member further includes an oil baffle plate, which is fixedly connected to the upper end of the oil guide plate, and a gap is left between the oil baffle plate and the side plate, and the gap is connected to the oil guide groove.

[0014] In some embodiments, the oil baffle plate is fixedly provided with a first convex bump extending toward the side plate, and a free end of the first convex bump is abutted against or connected to an inner surface of the side plate.

[0015] In some embodiments, a vent located below the oil baffle is provided at the lower end of the side plate, and / or an oil guide tongue extending downward is fixedly provided at the lower end of the side plate.

[0016] According to the range hood provided above, it is implemented through the following technical solutions:

[0017] A range hood comprises: a smoke hood, wherein a mounting port is provided at the top of the smoke hood, and a main air inlet is provided at the bottom of the smoke hood; an oil screen assembly is arranged at the main air inlet and is detachably connected to the smoke hood, the oil screen assembly having an oil filter portion for allowing smoke to pass through; and an oil guide structure as described above, wherein the box assembly is arranged at the mounting port and is detachably connected to the smoke hood, and the oil baffle is used to receive oil stains flowing down from the inner surface of the side panel and guide the oil stains to the inside of the smoke hood.

[0018] In some embodiments, an oil guide tongue extending downward is provided at the lower end of the side plate, and the oil guide tongue extends into the oil net assembly and is located outside the oil filter portion.

[0019] In some embodiments, an oil leakage port is opened at the rear end of the oil net assembly, and an oil cup assembly or a water cup assembly is detachably installed at the bottom of the smoke hood, and the water cup assembly has a sewage collection tank, and the sewage collection tank and the oil cup assembly are used to receive the oil pollution flowing down from the oil leakage port.

[0020] Compared with the prior art, the present invention has at least the following beneficial effects:

[0021] 1. The oil guide structure of the utility model is provided with an oil baffle at the lower end of the inner surface of the side plate, and an upwardly open oil guide groove is formed in the oil baffle or between the oil baffle and the side plate. The structure is simple and the oil stains on the side plate can be guided to the inside of the smoke hood through the oil baffle.

[0022] 2. By forming an outwardly convex arc-shaped air guide surface and / or an opening connected to the oil guide groove on the side of the oil baffle member facing away from the oil guide groove, the airflow can smoothly transition through the oil baffle member, reducing resistance and avoiding turbulence that affects the noise of the entire machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the oil guide structure in Embodiment 1 of the utility model;

[0024] Figure 2 This is a cross-sectional view of the oil guide structure in Example 1 of the utility model. Figure 1 ;

[0025] Figure 3 This is a cross-sectional view of the oil guide structure in Example 1 of the utility model. Figure 2 ;

[0026] Figure 4 This is a schematic diagram of the structure of the first oil baffle in Example 1 of the utility model. Figure 1 ;

[0027] Figure 5 This is a schematic diagram of the structure of the first oil baffle in Example 1 of the utility model. Figure 2 ;

[0028] Figure 6 This is a schematic structural diagram of the second oil baffle in Embodiment 1 of the present utility model;

[0029] Figure 7 This is a schematic structural diagram of the third oil retaining member in Embodiment 1 of the utility model;

[0030] Figure 8 This is a schematic structural diagram of the fourth oil baffle in Embodiment 1 of the utility model;

[0031] Fig. 9 This is a schematic structural diagram of the fifth oil baffle member in Embodiment 1 of the utility model;

[0032] Fig.10 It is a structural schematic diagram of the range hood in Embodiment 2 of the present utility model;

[0033] Fig.11 This is a cross-sectional view of the range hood in Embodiment 2 of the present utility model. Figure 1 ;

[0034] Fig.12 This is a cross-sectional view of the range hood in Embodiment 2 of the present utility model. Figure 2 .

[0035] In the figure: 1-box assembly, 11-side plate, 111-positioning protrusion, 112-air vent, 113-oil guide tongue, 12-front plate; 2-oil baffle, 21-oil guide plate, 211-oil guide groove, 212-arc-shaped air guide surface, 213-first strip hole, 214-second strip hole, 22-mounting plate, 221-positioning hole, 222-notch, 23-oil baffle, 231-gap, 232-first convex bump, 233-second convex bump; 3-smoke hood, 31-oil net sink, 32-secondary air inlet; 4-oil net assembly, 41-filter hole, 42-oil leakage port; 5-water cup assembly, 51-sewage collection tank; 6-guide plate assembly, 61-oil receiving tank, 62-oil drain port. DETAILED DESCRIPTION

[0036] The following examples illustrate the present invention, but the present invention is not limited by these examples. Modifications to the specific implementation of the present invention or equivalent replacement of some technical features without departing from the spirit of the present invention should be included in the scope of the technical solution claimed for protection in the present invention.

[0037] Example 1

[0038] refer to Figure 1-3 , this embodiment provides an oil guide structure, which is applied to a range hood. The oil guide structure includes a box assembly 1, which has a front plate 12 and two side plates 11 arranged opposite to each other, and the two side plates 11 are formed by the left and right ends of the front plate 12 being integrally bent backward. In this embodiment, vents 112 arranged at intervals in the front-to-back direction and used for smoke to pass through are provided at the lower end of each side plate 11, and an oil guide tongue 113 extending downward is integrally formed at the lower end of each side plate 11, and the oil guide tongue 113 is used to guide part of the oil on the side plate 11 to the inside of the oil net assembly of the range hood (see attached Fig.11 ) to prevent this part of the oil from flowing directly to the outside of the range hood.

[0039] The oil guide structure also includes two oil baffles 2, which are respectively installed at the lower ends of the inner surfaces of the two side panels 11 at an angle downward and rearward. Each oil baffle 2 is located above the air vent 112 of the corresponding side panel 11 to avoid the air vent 112 on the side panel 11 to prevent affecting the performance of the entire machine. In addition, the oil baffles 2 are used to guide the oil on the side panel 12 to the inside of the smoke hood of the range hood to prevent the oil inside the range hood from flowing to the outside when the range hood is performing the cleaning function, thereby preventing the clean water area of ​​the water cup assembly from being affected.

[0040] Furthermore, an upwardly opening oil guide groove 211 is formed between the oil baffle 2 and the side plate 11. Of course, the upwardly opening oil guide groove 211 can also be directly formed on the oil baffle 2. In this embodiment, the rear end of the oil guide groove 211 is open to form a rear end opening. The oil guide groove 211 is used to receive the oil stains flowing down from the inner surface of the side plate 11 and guide this part of the oil stains to the inside of the smoke hood. A convex arc-shaped air guide surface 212 and / or an opening (not shown in the figure) is formed on the side of the oil baffle 2 away from the oil guide groove 211. The opening is connected to the oil guide groove 211. In this way, the airflow can smoothly transition through the oil baffle 2 through the convex arc-shaped air guide surface 212 and / or the opening, reducing resistance and avoiding turbulence that affects the noise of the whole machine.

[0041] Specifically, the structure of the oil baffle 2 includes but is not limited to any of the following:

[0042] The first one, reference Figure 1-5 The oil baffle 2 includes an oil guide plate 21, a mounting plate 22 and an oil baffle plate 23. The oil guide plate 21 is an outwardly convex arc-shaped plate, so that an outwardly convex arc-shaped air guide surface 212 is formed on the side of the oil guide plate 21 away from the side plate 11. The oil guide plate 21 is installed at the lower end of the inner surface of the side plate 11 tilted toward the rear and downward and is located at the vent 112. The lower end of the oil guide plate 21 is arranged in close contact with the inner surface of the side plate 11, and the upper end is matched with the inner surface of the side plate 11 to form an upward opening. An upwardly opening oil guide groove 211 is formed between the oil guide plate 21 and the side plate 11, and the oil on the side plate 11 can flow into the oil guide groove 211 through the gap or the upward opening. A convex arc-shaped air guide surface 212 and / or an opening are formed on the side of the oil guide plate 21 away from the oil guide groove 211.

[0043] The mounting plate 22 is disposed below the oil guide plate 21 and fits against the inner surface of the side plate 11. The oil guide plate 21 is connected to the side plate 11 through the mounting plate 22, so that the oil guide plate 21 can be reliably mounted on the inner surface of the side plate 11 through the mounting plate 22. The oil baffle plate 23 is fixedly connected to the upper end of the oil guide plate 21, and a gap 231 is left between the oil baffle plate 23 and the side plate 11 (see Figure 2), the gap 231 is connected to the oil guide groove 211, so that the oil baffle plate 23 can form a blocking effect on the oil or sewage on the inner surface of the side plate 12, so as to guide the oil or sewage on the inner surface of the side plate 12 to flow into the oil guide groove 211 through the gap 231 as much as possible, and then guide it to the inside of the smoke hood of the range hood through the oil guide groove 211.

[0044] refer to Figure 4 In this embodiment, the openings include a plurality of first strip holes 213 and a plurality of second strip holes 214 arranged at intervals along the length direction of the oil guide plate 21. The first strip holes 213 and the second strip holes 214 are arranged alternately along the length direction of the oil guide plate 21. The first strip holes 213 are arranged vertically and penetrate the upper and lower ends of the oil guide plate 21, and the second strip holes 214 are arranged horizontally and penetrate the lower end of the oil guide plate 21. Of course, the second strip holes 214 can also be designed to be arranged vertically. In other embodiments, all the first strip holes 213 or all the second strip holes 214 can be omitted.

[0045] refer to Figure 4-5 In this embodiment, the mounting plate 22 is a vertical plate, which is connected to the inner surface of the side plate 11 by bonding or welding. A plurality of positioning holes 221 and a plurality of notches 222 are provided on the mounting plate 22. All the positioning holes 221 are arranged at intervals along the length direction of the mounting plate 22. Positions of the side plate 11 corresponding to the positioning holes 221 are provided with positioning protrusions 111 inserted into the positioning holes 221, so that the mounting plate 22 of the oil retaining member 2 can be quickly pre-positioned on the inner surface of the side plate 11 through the cooperation of the plurality of positioning protrusions 111 with the plurality of positioning holes 221, and the oil retaining member 2 can be rotated relative to the side plate 11. All the notches 222 are arranged at intervals at the lower end of the mounting plate 22 along the length direction of the mounting plate 22, and they are in any of the shapes of an inverted "V", an inverted "U" or an "M". In other embodiments, all the positioning holes 221 or all the notches 222 can be omitted.

[0046] The oil baffle plate 23 is integrally formed with two first convex bumps 232 extending toward the side plate 11, and the free end of each first convex bump 232 abuts or connects with the inner surface of the side plate 11. In this embodiment, the height of the first convex bump 232 in the left-right direction is 2.5±0.5mm, and it is integrally stamped by a part of the oil baffle plate 23 toward the side plate 11 arranged near it. The setting of the first convex bump allows the oil to flow between the oil baffle plate 23 and the side plate 11, and is conducive to strengthening the strength of the oil baffle plate 23. In particular, the first convex bump 232 can be bonded or welded to the inner surface of the side plate 11 to form an upper connection, which cooperates with the lower connection formed between the mounting plate 22 and the side plate 11, so that the installation of the oil baffle 2 is more stable and reliable.

[0047] The second one, reference Figure 6The difference between the first type and the second type is that the oil baffle member 2 omits the oil baffle plate 23 . In this case, the oil baffle member 2 only includes the oil guide plate 21 and the mounting plate 22 .

[0048] The third type, reference Figure 7 The difference between it and the second type is that two second convex bumps 233 extending toward the side plate 11 are integrally formed at the upper end of the oil guide plate 21, and the free end of each second convex bump 233 abuts or is connected to the inner surface of the side plate 11, so that there is a space for oil to flow between the upper end of the oil guide plate 2 and the side plate 11, and it is beneficial to strengthen the strength of the oil guide plate 2 itself.

[0049] The fourth type, reference Figure 8 The difference between it and the first type is that the oil baffle member 2 omits the mounting plate 22. At this time, the oil baffle member 2 only includes the oil guide plate 21 and the oil baffle plate 23. When the oil baffle member 2 is installed on the inner surface of the side plate 11, the lower end of the oil guide plate 21 is arranged in contact with the inner surface of the side plate 11, and the first convex bump 232 on the oil baffle plate 23 is bonded or welded to the inner surface of the side plate 11. In this way, the oil baffle member 2 is stably and reliably installed on the side plate through the oil baffle plate 23, so that the oil baffle plate 23 plays multiple roles such as blocking oil and fixing the oil guide plate 21.

[0050] Fifth, reference Fig. 9 The difference between the first type and the second type is that the oil baffle 2 omits the mounting plate 22 and the oil baffle 23. In this case, the oil baffle 2 only includes the oil guide plate 21, and two second convex bumps 233 extending toward the side plate 11 are integrally formed at the upper end of the oil guide plate 21. During installation, the lower end of the oil guide plate 21 is arranged in close contact with the inner surface of the side plate 11, and the upper end is gap-matched with the inner surface of the side plate 11 to form an upward opening, while the free end of the second convex bump 233 is abutted or connected to the inner surface of the side plate 11. In order to fix the oil baffle 2 on the side plate, the lower end of the oil guide plate 21 and / or the second convex bump 233 are fixedly connected to the inner surface of the side plate by bonding or welding.

[0051] Example 2

[0052] refer to Figure 10-12The present embodiment provides a range hood, comprising a smoke hood 3, an oil net assembly 4 and an oil guide structure as described in Example 1. A mounting port (not shown in the figure) is provided at the top of the smoke hood 3, and a main air inlet (not shown in the figure) and two secondary air inlets 32 arranged obliquely toward the rear and downward are provided at the bottom of the smoke hood 3. The two secondary air inlets 32 are located on the left and right outer sides of the main air inlet, and an oil net sink 31 is formed on the periphery of the main air inlet. The oil net assembly 4 is arranged at the main air inlet and is detachably connected to the oil net sink 31 of the smoke hood 3. At this time, the oil net assembly 4 is arranged obliquely toward the rear and downward, and the oil net assembly 4 has an oil filter part for smoke to pass through, and the oil filter part is composed of filter holes 41 arranged at intervals. The box assembly 1 is arranged at the mounting port and is detachably connected to the smoke hood 3. The oil baffle 2 is used to receive the oil stains flowing down from the inner surface of the side plate 11 and guide the oil stains to the inside of the smoke hood 3.

[0053] Specifically, the lower end of the side plate 11 extends downward into the oil net assembly 4 and is connected to the oil net sink 31. A vent is provided at the lower end of the side plate 11 between the oil baffle 2 and the oil net assembly 4. In addition, an oil guide tongue 113 extending downward is integrally formed at the rear side of the lower end of the side plate 11. The oil guide tongue 113 extends into the oil net assembly 4 and is located outside the oil filter. The lower end of the oil guide tongue 113 abuts against or is gap-fitted with the top of the oil net assembly 4, and is used to guide part of the oil on the side plate 11 to the inside of the oil net assembly 4 of the range hood to ensure that it does not flow directly to the outside of the fume hood 3.

[0054] Furthermore, the range hood also includes an oil cup assembly or a water cup assembly 5, an oil leakage port 42 located behind the oil filter portion is opened at the rear end of the oil net assembly 4, and the oil cup assembly or the water cup assembly 5 is detachably installed at the bottom of the smoke hood 3, the water cup assembly 5 has a clean water area and a sewage collecting tank 51 arranged corresponding to the oil leakage port 42, the sewage collecting tank 51 and the oil cup assembly are used to receive the oil flowing down from the oil leakage port 42, so that the oil inside the oil net assembly 4 flows to the oil leakage port 42, then flows to the outside of the smoke hood 1, and finally flows into the sewage collecting tank 51 of the oil cup assembly or the water cup assembly 5.

[0055] Furthermore, the range hood also includes a guide plate assembly 6, which is arranged directly below the oil net assembly 4 and is detachably connected to the smoke hood 3. The guide plate assembly 6 has an upwardly open oil receiving groove 61, which is used to receive the oil flowing down from the oil net assembly 4. An oil discharge port 62 is provided at the rear end of the guide plate assembly 6, and the oil guide groove 211 is connected to the sewage collecting groove 51 and the interior of the oil cup assembly through the oil discharge port 62. In this way, the oil flowing down from the oil leakage port 42 of the oil net assembly 4 can be diverted into the oil cup assembly or the sewage collecting groove 51 of the water cup assembly 5 through the guide plate assembly 6 to prevent it from dripping directly downward onto the stove or the clean water area of ​​the water cup assembly.

[0056] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. An oil guide structure, characterized in that: include: A box assembly (1), wherein the box assembly (1) has a side plate (11); as well as An oil baffle (2) is mounted on the lower end of the inner surface of the side plate (11); an upwardly open oil guide groove (211) is formed on the oil baffle (2) or between the oil baffle (2) and the side plate (11); an outwardly convex arc-shaped air guide surface (212) and / or an opening is formed on a side of the oil baffle (2) facing away from the oil guide groove (211); the opening is connected to the oil guide groove (211).

2. An oil guide structure according to claim 1, characterized in that: The oil baffle (2) comprises an oil guide plate (21), the oil guide plate (21) being mounted on the lower end of the inner surface of the side plate (11), an upwardly open oil guide groove (211) being formed on the oil guide plate (21) or between the oil guide plate (21) and the side plate (11), an outwardly convex arc-shaped air guide surface (212) and / or an opening being formed on a side of the oil guide plate (21) facing away from the oil guide groove (211), and the opening being connected to the oil guide groove (211).

3. An oil guide structure according to claim 2, characterized in that: The openings include a plurality of first strip holes (213) and / or a plurality of second strip holes (214) arranged at intervals along the length direction of the oil guide plate (21), the first strip holes (213) being arranged vertically and passing through the upper and lower ends of the oil guide plate (21), and the second strip holes (214) being arranged horizontally or vertically and passing through the lower end of the oil guide plate (21).

4. An oil guide structure according to claim 3, characterized in that: The first strip-shaped holes (213) and the second strip-shaped holes (214) are arranged alternately along the length direction of the oil guide plate (21).

5. An oil guide structure according to claim 2, characterized in that: A second convex bump (233) extending toward the side plate (11) is fixedly provided at the upper end of the oil guide plate (21), and a free end of the second convex bump (233) is abutted against or connected to the inner surface of the side plate (11).

6. An oil guide structure according to claim 2, characterized in that: The oil baffle (2) further comprises a mounting plate (22), wherein the mounting plate (22) is arranged below the oil guide plate (21) and is in contact with the inner surface of the side plate (11), and the oil guide plate (21) is connected to the side plate (11) via the mounting plate (22).

7. An oil guide structure according to claim 6, characterized in that: The mounting plate (22) is provided with a plurality of positioning holes (221) and / or a plurality of notches (222), and the side plate (11) is provided with positioning protrusions (111) inserted into the positioning holes (221) at positions corresponding to the positioning holes (221).

8. An oil guide structure according to claim 7, characterized in that: All of the positioning holes (221) are arranged at intervals along the length direction of the mounting plate (22); the notch (222) is provided at the lower end of the mounting plate (22) and is in any one of an inverted "V", an inverted "U" or an "M" shape.

9. An oil guide structure according to any one of claims 2 to 8, characterized in that: The oil baffle member (2) further comprises an oil baffle plate (23), wherein the oil baffle plate (23) is fixedly connected to the upper end of the oil guide plate (21), and a gap (231) is left between the oil baffle plate (23) and the side plate (11), and the gap (231) is connected to the oil guide groove (211).

10. An oil guide structure according to claim 9, characterized in that: The oil baffle plate (23) is fixedly provided with a first convex bump (232) extending toward the side plate (11), and a free end of the first convex bump (232) is in contact with or connected to the inner surface of the side plate (11).

11. An oil guide structure according to claim 1, characterized in that: A vent (112) located below the oil blocking member (2) is provided at the lower end of the side plate (11).

12. A range hood, characterized in that: include: A smoke collecting hood (3), wherein a mounting opening is provided at the top of the smoke collecting hood (3), and a main air inlet is provided at the bottom of the smoke collecting hood (3); An oil net assembly (4) is arranged at the main air inlet and is detachably connected to the smoke collecting hood (3), the oil net assembly (4) having an oil filter portion for smoke to pass through; as well as An oil guiding structure according to any one of claims 1 to 11, wherein the box assembly (1) is arranged at the mounting opening and is detachably connected to the smoke hood (3), and the oil baffle (2) is used to receive the oil stains flowing down from the inner surface of the side panel (11) and guide the oil stains to the inside of the smoke hood (3).

13. The range hood according to claim 12, characterized in that: An oil guide tongue (113) extending downward is provided at the lower end of the side plate (11), and the oil guide tongue (113) extends into the oil net assembly (4) and is located outside the oil filter portion.

14. A range hood according to claim 12 or 13, characterized in that: An oil leakage port (42) is provided at the rear end of the oil net assembly (4), and an oil cup assembly or a water cup assembly (5) is detachably mounted at the bottom of the smoke collecting hood (3), wherein the water cup assembly (5) has a sewage collection tank (51), and the sewage collection tank (51) and the oil cup assembly are used to receive the oil dirt flowing down from the oil leakage port (42).

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