CN218763566U - Fume exhaust fan - Google Patents

Abstract

The utility model discloses a range hood. The range hood comprises a smoke collecting hood and an oil filtering structure, wherein a first air inlet and a second air inlet are formed in the bottom side of the smoke collecting hood, a first oil screen is arranged at the first air inlet, a second oil screen is arranged at the second air inlet, the oil filtering structure comprises an oil plate, the oil filtering plate comprises a first filter plate and a second filter plate connected with the first filter plate, a first mesh group is formed in the first filter plate, a second mesh group is formed in the second filter plate, the first mesh group is positioned above the first oil screen, and the second mesh group is positioned above the second oil screen; the structure of making an uproar falls, fall the piece of making an uproar and fall the piece of making an uproar including the first piece of making an uproar and the second of making an uproar, fall the first piece of making an uproar and fall and all offered on the piece of making an uproar with the second and fall, the first piece of making an uproar of falling is installed at the upside of first filter plate and is covered and close on first mesh group, the first groove of making an uproar of falling sets up towards first mesh group, the second falls the piece of making an uproar and installs the upside and the lid at the second filter plate and close on second mesh group, the first groove of making an uproar of falling sets up towards second mesh group.

Description

Fume exhaust fan

Technical Field

The utility model relates to a kitchen electricity technical field especially relates to a range hood.

Background

In the prior art, a fan with larger power is generally adopted, so that higher air pressure is ensured, the oil smoke suction effect of the range hood is further ensured, and the oil smoke escape is reduced. However, when the fan with larger power is running, the noise will increase, and the use experience of the user will be affected.

Therefore, a range hood is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the problems that exist among the current correlation technique at least to a certain extent, for this reason, the utility model provides a range hood has better noise reduction and oil smoke filter effect.

The above purpose is realized by the following technical scheme:

the utility model provides a range hood, includes the collection petticoat pipe, first air intake and second air intake have been seted up to the bottom side of collection petticoat pipe, first air intake department is provided with first oil net, second air intake department is provided with second oil net, still includes:

the oil filtering structure comprises an oil filtering plate arranged above the first oil screen and the second oil screen, the oil filtering plate comprises a first filtering plate and a second filtering plate connected with the first filtering plate, a first mesh group is arranged on the first filtering plate, a second mesh group is arranged on the second filtering plate, the first mesh group is positioned above the first oil screen, and the second mesh group is positioned above the second oil screen;

the structure of making an uproar falls including the first piece and the second piece of making an uproar of falling, the first piece of making an uproar of falling with the second fall and all seted up on the piece of making an uproar and fallen the groove of making an uproar, the first piece of making an uproar of falling is installed the upside and the lid of first filter plate are closed on the first mesh group, the first groove orientation of making an uproar of falling first mesh group sets up, the second falls the piece of making an uproar and installs the upside and the lid of second filter plate are closed on the second mesh group, the first groove orientation of making an uproar of falling the second mesh group sets up.

Optionally, the depth of the noise reduction groove is 12-15mm.

Optionally, the first oil screen comprises a first screen sheet and a second screen sheet, the first screen sheet is obliquely arranged from a side close to the second oil screen to a side far away from the second oil screen, the second screen sheet is connected with a side of the first screen sheet far away from the second oil screen, the second screen sheet is obliquely arranged from a side close to the second screen sheet to a side far away from the second oil screen, and the first screen sheet and the first filter plate are arranged in parallel;

the second oil screen includes third net piece and fourth net piece, the third net piece is from being close to one side of first oil screen is to keeping away from one side tilt up setting of first oil screen, the fourth net piece with keeping away from of third net piece one side of first oil screen is connected, and, the fourth net piece is from being close to one side of first oil screen is to keeping away from one side tilt down setting of one side of first oil screen, the third net piece with second filter plate parallel arrangement.

Optionally, still include third mesh group and fourth mesh group, the third mesh group is seted up on the first filter plate and is located the top of second net piece, the fourth mesh group is seted up on the second filter plate and is located the top of fourth net piece.

Optionally, still include first drive structure and second drive structure, first drive structure with the transmission of the first piece of making an uproar is connected, can drive the first piece of making an uproar is relative first filter plate motion is in order to close at the lid on the first mesh group and opening switch between the two kinds of states of first mesh group, second drive structure with the transmission of the second piece of making an uproar is connected, can drive the second is made an uproar relatively the second filter plate motion is fallen to the second, closes at the lid on the second mesh group and opening switch between the two kinds of states of second mesh group.

Optionally, one side of the first noise reduction piece with first filter plate is articulated, first drive structure can drive the first noise reduction piece relative first filter plate swing to the lid closes or opens first mesh group, one side of the second noise reduction piece with the second filter plate is articulated, and second transmission structure can drive the second noise reduction piece relative the second filter plate swing to the lid closes or opens the second mesh group.

Optionally, the downside of collection petticoat pipe has still seted up and has been located third air inlet between first air intake and the second air intake, third air inlet department is provided with the third oil net, the oil cleaner still includes the third filter plate, the third filter plate is located first filter plate with between the second filter plate, set up the fifth mesh group and the sixth mesh group that the interval set up on the third filter plate, the fifth mesh group with be provided with the condensation plate between the sixth mesh group, the condensation plate is located the top of third oil net.

Optionally, the hinge joint of the first noise reduction component and the oil filter plate is located between the first mesh group and the fifth mesh group, the hinge joint of the second noise reduction component and the oil filter plate is located between the second mesh group and the sixth mesh group, when the first noise reduction component is in a state of opening the first mesh group and the second noise reduction component is in a state of opening the second mesh group, the first noise reduction component is obliquely arranged from bottom to top towards a direction close to the second noise reduction component, the second noise reduction component is obliquely arranged from bottom to top towards a direction close to the first noise reduction component, and the first noise reduction component and the second noise reduction component are arranged at intervals.

Optionally, the third oil screen is arranged in parallel with the third filter plate.

Optionally, the oil filter further comprises an oil cup, the oil cup is arranged on the lower side of the rear end of the smoke collecting hood, the oil filtering structure, the first oil screen and the second oil screen are arranged in a downward inclined manner from front to back, and the rear end of the oil filtering structure, the rear end of the first oil screen and the rear end of the second oil screen all extend into the oil cup or are located on the upper side of the oil cup.

Compared with the prior art, the utility model discloses at least, including following beneficial effect:

the utility model provides a range hood sets up the oil cleaner through the top at first oil net and second oil net to set up first mesh group and second mesh group on the oil cleaner, first mesh group is located the top of first oil net, and second mesh group is located the top of second oil net, so that the oil smoke is behind through first oil net and second oil net, filters via first mesh group and second mesh group once more, thereby realizes the dual filter effect to the oil smoke. And the first noise reduction piece and the second noise reduction piece are arranged, so that the oil smoke enters the noise reduction grooves of the first noise reduction piece after passing through the first mesh group, and similarly, can make the oil smoke get into the second after the second mesh group and fall the groove of making an uproar in making an uproar, play the effect of making an uproar on the one hand, on the other hand can carry out the third and heavily filter to the oil smoke to the oil strain effect has further been improved.

Drawings

Fig. 1 is a schematic perspective view of a range hood according to an embodiment of the present invention;

fig. 2 is a schematic view of a three-dimensional structure of the extractor hood provided by the embodiment of the present invention after the body structure is removed (the first noise reduction member covers the first mesh group, and the second noise reduction member covers the second mesh group);

fig. 3 is a rear view of the range hood provided by the embodiment of the present invention after the body structure is removed (the first noise reduction member covers the first mesh group, and the second noise reduction member covers the second mesh group);

fig. 4 is a schematic view of a three-dimensional structure of the range hood provided by the embodiment of the present invention after the body structure is removed (the first noise reduction member opens the first mesh group, and the second noise reduction member opens the second mesh group);

fig. 5 is a rear view of the range hood provided by the embodiment of the present invention after the body structure is removed (the first noise reduction member opens the first mesh group, and the second noise reduction member opens the second mesh group);

fig. 6 is a front view of the range hood provided by the embodiment of the present invention after the body structure is removed;

fig. 7 isbase:Sub>A cross-sectional view taken atbase:Sub>A-base:Sub>A in fig. 6.

In the figure:

11. a first oil screen; 111. a first mesh sheet; 112. a second mesh sheet; 12. a second oil screen; 121. a third mesh sheet; 122. a fourth mesh sheet; 13. a third oil network;

2. an oil filtering structure; 201. a first filter plate; 202. a second filter plate; 200. a third filter plate; 21. a fifth mesh group; 22. a sixth group of mesh; 23. a first group of mesh openings; 24. a second group of mesh openings; 25. a third group of mesh openings; 26. a fourth group of mesh;

3. a smoke collecting hood;

40. a noise reduction groove; 411. a first drive structure; 412. a second drive structure; 421. a first noise reducing member; 422. a second noise reducing member;

5. a body structure;

6. an oil cup.

Detailed Description

The present invention is illustrated by the following examples, but the present invention is not limited to these examples. To the embodiment of the present invention, modify or replace some technical features, without departing from the spirit of the present invention, it should be covered in the technical solution scope of the present invention.

Referring to fig. 1-5, the present invention provides a range hood, which comprises a smoke collecting hood 3 and a body structure 5 disposed on the upper side of the smoke collecting hood 3, wherein a first air inlet and a second air inlet are disposed on the bottom side of the smoke collecting hood 3, the first air inlet is provided with a first oil screen 11, the second air inlet is provided with a second oil screen 12, and an oil filtering structure 2 is further included. The oil filtering structure 2 is arranged in a cavity between the smoke collecting hood 3 and the body structure 5, the oil filtering structure 2 comprises an oil filtering plate arranged above a first oil screen 11 and a second oil screen 12, the oil filtering plate comprises a first filtering plate 201 and a second filtering plate 202 connected with the first filtering plate 201, a first mesh group 23 is arranged on the first filtering plate 201, a second mesh group 24 is arranged on the second filtering plate 202, the first mesh group 23 is positioned above the first oil screen 11, and the second mesh group 24 is positioned above the second oil screen 12. The structure of making an uproar falls including first fall the piece 421 and fall the piece 422 of making an uproar with the second, fall and all seted up on the piece 421 and the second fall the piece 422 of making an uproar and fall the groove 40 of making an uproar, first fall the piece 421 of making an uproar and install the upside and cover at first mesh group 23 of first filter plate 201 and close on first mesh group 23, the groove 40 of making an uproar of first fall the piece 421 sets up towards first mesh group 23, the piece 422 of making an uproar falls the upside and cover and close on second mesh group 24 of second filter plate 202 of second, the groove 40 of making an uproar of falling the piece 421 of making an uproar sets up towards second mesh group 24.

The utility model provides a range hood sets up the oil cleaner through the top at first oil net 11 and second oil net 12, and set up first mesh group 23 and second mesh group 24 on the oil cleaner, first mesh group 23 is located the top of first oil net 11, second mesh group 24 is located the top of second oil net 12, so that the oil smoke is after through first oil net 11 and second oil net 12, once more via first mesh group 23 and 24 filtration of second mesh group, thereby realize the dual filter effect to the oil smoke. And through setting up first noise reduction piece 421 and second noise reduction piece 422 to make the oil smoke get into the groove 40 of making an uproar of first noise reduction piece 421 after passing through first mesh group 23, likewise, can make the oil smoke get into the groove 40 of making an uproar of second noise reduction piece 422 after passing through second mesh group 24, play the effect of making an uproar on the one hand, on the other hand can carry out the third and filter to the oil smoke, thereby further improved the oil strain effect.

Optionally, the depth of the noise reduction groove 40 is 12-15mm to ensure the noise reduction effect. Specifically, in the present embodiment, the depth of the noise reduction groove 40 is 12mm.

Optionally, the aperture of the first mesh group 23 and the aperture of the second mesh group 24 are 0.8-2mm, which mainly plays a role of noise reduction, after the first mesh group 23 is covered by the first noise reduction component 421, more oil smoke can flow along the first filter plate 201 where the first mesh group 23 is located, so as to implement condensation, and similarly, after the second mesh group 24 is covered by the second noise reduction component 422, more oil smoke can flow along the second filter plate 202 where the second mesh group 24 is located, so as to implement condensation. Specifically, in the present embodiment, the aperture diameter of the first mesh group 23 and the second mesh group 24 is 0.8mm.

Optionally, the first oil screen 11 includes a first screen 111 and a second screen 112, the first screen 111 is inclined upward from a side close to the second oil screen 12 to a side far away from the second oil screen 12, the second screen 112 is connected to a side of the first screen 111 far away from the second oil screen 12, and the second screen 112 is inclined downward from a side close to the second screen 112 to a side far away from the second oil screen 12, and the first screen 111 and the first filter plate 201 are arranged in parallel, so that the first filter plate 201 is disposed, the occupied space of the first filter plate 201 is favorably reduced, and further the range hood is favorably miniaturized. The second oil screen 12 includes a third screen 121 and a fourth screen 122, the third screen 121 is inclined upward from one side close to the first oil screen 11 to one side far away from the first oil screen 11, the fourth screen 122 is connected with one side of the third screen 121 far away from the first oil screen 11, and the fourth screen 122 is inclined downward from one side close to the first oil screen 11 to one side far away from the first oil screen 11, the third screen 121 is parallel to the second filter plate 202, so that the second filter plate 202 is arranged, the occupied space of the second filter plate 202 is favorably reduced, and the miniaturization of the range hood is further favorably realized.

Optionally, a third group of orifices 25 and a fourth group of orifices 26 are included, the third group of orifices 25 being disposed on the first filter plate 201 above the second mesh 112, and the fourth group of orifices 26 being disposed on the second filter plate 202 above the fourth mesh 122. By arranging the third mesh group 25 and the fourth mesh group 26, the double filtration of more oil smoke is facilitated, and the oil smoke filtration effect is further improved.

Optionally, a first driving structure 411 and a second driving structure 412 are further included, the first driving structure 411 is in driving connection with the first noise reducer 421, and can drive the first noise reducer 421 to move relative to the first filter plate 201 to switch between two states of covering the first mesh group 23 and opening the first mesh group 23, and the second driving structure 412 is in driving connection with the second noise reducer 422, and can drive the second noise reducer 422 to move relative to the second filter plate 202 to switch between two states of covering the second mesh group 24 and opening the second mesh group 24.

Specifically, when the cooking bench located below the first oil mesh 11 is independently opened, the first transmission structure operates and drives the first noise reduction component 421 to move and open the first mesh group 23, the second transmission structure drives the second noise reduction component 422 to move and cover the second mesh group 24, so that the negative pressure center of the range hood is transferred to the position close to the first oil mesh 11, which is beneficial to reducing the escape amount of oil smoke, and meanwhile, because the first noise reduction component 421 located at the position of the first mesh group 23 is in an open state, the oil smoke flows more smoothly, and the noise generated by the flow of the smoke is further reduced. Similarly, when the cooking bench below the second oil net 12 is separately opened, the second transmission structure operates and drives the second noise reduction member 422 to move and open the second mesh group 24, the first transmission structure drives the first noise reduction member 421 to move and cover the first mesh group 23, so that the negative pressure center line of the range hood is transferred to a position close to the second oil net 12, which is beneficial to reducing the escape amount of oil smoke, and meanwhile, because the second noise reduction member 422 located at the second mesh group 24 is in an open state, the oil smoke flows more smoothly, and the noise generated by the flow of the smoke is further reduced. When the cooktops under the first oil mesh 11 and the second oil mesh 12 are both opened, the first transmission structure operates and drives the first noise reduction member 421 to move and open the first mesh group 23, and the second transmission structure operates and drives the second noise reduction member 422 to move and open the second mesh group 24, so that the oil smoke can smoothly flow, and the noise generated by the flow of the smoke is reduced.

Optionally, one side of the first noise reducer 421 is hinged to the first filter plate 201, and the first transmission structure can drive the first noise reducer 421 to swing relative to the first filter plate 201 to close or open the first mesh group 23. One side of the second noise reducer 422 is hinged to the second filter plate 202, and the second transmission structure can drive the second noise reducer 422 to swing relative to the second filter plate 202 to close or open the second mesh group 24.

Optionally, a third air inlet located between the first air inlet and the second air inlet is further formed in the lower side of the smoke collecting hood 3, a third oil screen 13 is arranged at the third air inlet, the oil filter plate further comprises a third filter plate 200, the third filter plate 200 is located between the first filter plate 201 and the second filter plate 202, a fifth mesh group 21 and a sixth mesh group 22 which are arranged at intervals are formed in the third filter plate 200, a condensation plate is arranged between the fifth mesh group 21 and the sixth mesh group 22, and the condensation plate is located above the third oil screen 13. Through setting up the third air inlet to set up third oil net 13 in third air inlet department, in order to increase the air inlet area, guarantee the filter effect of oil smoke simultaneously. And through setting up the condensation plate above the third oil net 13, so that the oil smoke filtered via the third oil net 13 can further condense on the condensation plate, thereby improve the filtering effect to the oil smoke, and through setting up the fifth mesh group 21 on one side of the condensation plate, set up the sixth mesh group 22 on the opposite side of the condensation plate, so that the oil smoke flowing along the condensation plate can be discharged after the filtration of the fifth mesh group 21 or the sixth mesh group 22 again, thereby further improve the filtering effect to the oil smoke, and further, the oil smoke entering the range hood via the third air inlet carries out the triple filtration, so that the range hood has better oil filtering effect.

Optionally, the hinge joint of the first noise reduction member 421 and the oil filter plate is located between the first mesh group 23 and the fifth mesh group 21, the hinge joint of the second noise reduction member 422 and the oil filter plate is located between the second mesh group 24 and the sixth mesh group 22, when the first noise reduction member 421 is in a state of opening the first mesh group 23 and the second noise reduction member 422 is in a state of opening the second mesh group 24, the first noise reduction member 421 is obliquely arranged from bottom to top in a direction close to the second noise reduction member 422, the second noise reduction member 422 is obliquely arranged from bottom to top in a direction close to the first noise reduction member 421, and the first noise reduction member 421 and the second noise reduction member 422 are arranged at intervals, so that the oil smoke discharged through the fifth mesh group 21 and/or the sixth mesh group 22 can be guided by the obliquely arranged first noise reduction member 421 and the second noise reduction member 422, the flow speed of the oil smoke is increased, and the oil smoke absorption effect of the range hood is further improved.

Optionally, the third oil screen 13 and the third filter plate 200 are arranged in parallel, so that the third filter plate 200 can be arranged close to the third oil screen 13, thereby avoiding the third filter plate 200 occupying too large space and being beneficial to the miniaturization of the range hood.

Referring to fig. 6 and 7, optionally, the oil cup 6 is further included, the oil cup 6 is disposed at a lower side of a rear end of the smoke collecting hood 3, the oil filtering structure 2, the first oil screen 11, the second oil screen 12 and the third oil screen 13 are all disposed obliquely downward from front to back, and a rear end of the oil filtering structure 2, a rear end of the first oil screen 11, a rear end of the second oil screen 12 and a rear end of the third oil screen 13 all extend into the oil cup 6 or are located at an upper side of the oil cup 6, so that oil stains on the oil filtering structure 2, the first oil screen 11, the second oil screen 12 and the third oil screen 13 can smoothly flow into the oil cup 6.

Optionally, an included angle a exists between the oil filtering structure 2, the first oil screen 11, the second oil screen 12 and the third oil screen 13 from front to back and the horizontal plane, and the value range of the included angle a is 3-8 °. In this embodiment, the included angle a is 3 °.

What has been described above are only some embodiments of the invention. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are within the scope of the invention.

Claims (10)

1. The utility model provides a range hood, includes collection petticoat pipe (3), first air intake and second air intake have been seted up to the bottom side of collection petticoat pipe (3), first air intake department is provided with first oil net (11), second air intake department is provided with second oil net (12), its characterized in that still includes:

the oil filtering structure (2) comprises an oil filtering plate arranged above the first oil screen (11) and the second oil screen (12), the oil filtering plate comprises a first filtering plate (201) and a second filtering plate (202) connected with the first filtering plate (201), a first mesh group (23) is arranged on the first filtering plate (201), a second mesh group (24) is arranged on the second filtering plate (202), the first mesh group (23) is positioned above the first oil screen (11), and the second mesh group (24) is positioned above the second oil screen (12);

the structure of making an uproar falls, fall the piece (422) of making an uproar including first fall the piece (421) and the second fall, first fall the piece (421) of making an uproar with fall the piece (422) and go up and all seted up and fall and make an uproar groove (40) on the second fall, first fall the piece (421) of making an uproar and install the upside and the lid of first filter plate (201) are in on first mesh group (23), fall the groove (40) orientation of making an uproar of first fall the piece (421) first mesh group (23) set up, the piece (422) of making an uproar is installed to the second fall the upside and the lid of second filter plate (202) are in on second mesh group (24), fall the groove (40) orientation of making an uproar of first fall the piece (421) of making an uproar the second mesh group (24) set up.

2. The range hood according to claim 1, wherein the depth of the noise reduction groove (40) is 12-15mm.

3. The range hood according to claim 1, wherein the first oil screen (11) comprises a first screen sheet (111) and a second screen sheet (112), the first screen sheet (111) is disposed to incline upward from a side close to the second oil screen (12) to a side far from the second oil screen (12), the second screen sheet (112) is connected to a side of the first screen sheet (111) far from the second oil screen (12), and the second screen sheet (112) is disposed to incline downward from a side close to the second screen sheet (112) to a side far from the second oil screen (12), the first screen sheet (111) is disposed in parallel with the first filter sheet (201);

the second oil screen (12) comprises a third mesh (121) and a fourth mesh (122), the third mesh (121) is close to one side of the first oil screen (11) and far away from the one side of the first oil screen (11) in an inclined mode, the fourth mesh (122) is far away from the third mesh (121), one side of the first oil screen (11) is connected, the fourth mesh (122) is close to one side of the first oil screen (11) and far away from the one side of the first oil screen (11) in an inclined mode, the one side of the first oil screen (11) is in an inclined mode, the third mesh (121) and the second filter plate (202) are arranged in parallel.

4. The range hood of claim 3, further comprising a third group of perforations (25) and a fourth group of perforations (26), the third group of perforations (25) being provided on the first filter plate (201) and above the second mesh (112), the fourth group of perforations (26) being provided on the second filter plate (202) and above the fourth mesh (122).

5. The range hood according to any one of claims 1 to 4, further comprising a first driving structure (411) and a second driving structure (412), wherein the first driving structure (411) is in transmission connection with the first noise reduction member (421) and can drive the first noise reduction member (421) to move relative to the first filter plate (201) so as to switch between two states of covering the first mesh group (23) and opening the first mesh group (23), and the second driving structure (412) is in transmission connection with the second noise reduction member (422) and can drive the second noise reduction member (422) to move relative to the second filter plate (202) so as to switch between two states of covering the second mesh group (24) and opening the second mesh group (24).

6. The range hood according to claim 5, wherein one side of the first noise reduction member (421) is hinged to the first filter plate (201), the first driving structure (411) can drive the first noise reduction member (421) to swing relative to the first filter plate (201) to cover or open the first mesh group (23), one side of the second noise reduction member (422) is hinged to the second filter plate (202), and the second driving structure (412) can drive the second noise reduction member (422) to swing relative to the second filter plate (202) to cover or open the second mesh group (24).

7. The range hood according to claim 6, wherein a third air inlet between the first air inlet and the second air inlet is further opened at a lower side of the smoke collecting hood (3), a third oil screen (13) is arranged at the third air inlet, the oil filter plate further comprises a third filter plate (200), the third filter plate (200) is located between the first filter plate (201) and the second filter plate (202), a fifth mesh group (21) and a sixth mesh group (22) which are arranged at intervals are opened on the third filter plate (200), a condensation plate is arranged between the fifth mesh group (21) and the sixth mesh group (22), and the condensation plate is located above the third oil screen (13).

8. A range hood according to claim 7, wherein the hinge of the first noise reducer (421) to the oil filter plate is located between the first mesh group (23) and the fifth mesh group (21), the hinge of the second noise reducer (422) to the oil filter plate is located between the second mesh group (24) and the sixth mesh group (22), when the first noise reducer (421) is in a state of opening the first mesh group (23) and the second noise reducer (422) is in a state of opening the second mesh group (24), the first noise reducer (421) is inclined from bottom to top in a direction close to the second noise reducer (422), the second noise reducer (422) is inclined from bottom to top in a direction close to the first noise reducer (421), and the first noise reducer (421) and the second noise reducer (422) are spaced apart from each other.

9. The range hood according to claim 8, wherein the third oil screen (13) is arranged in parallel with the third filter plate (200).

10. A range hood according to any one of claims 1 to 4, further comprising an oil cup (6), wherein the oil cup (6) is arranged at the lower side of the rear end of the smoke collecting hood (3), the oil filtering structure (2), the first oil screen (11) and the second oil screen (12) are arranged obliquely downwards from front to back, and the rear end of the oil filtering structure (2), the rear end of the first oil screen (11) and the rear end of the second oil screen (12) all extend into the oil cup (6) or are located at the upper side of the oil cup (6).

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