Range hood

Abstract

The present application relates to the technical field of household appliances, and discloses an oil fume exhauster, which comprises a smoke collecting cavity, a first smoke collecting part and a second smoke collecting part, the first smoke collecting part is provided with an inlet, the second smoke collecting part is connected to one side of the top of the first smoke collecting part and communicates with the first smoke collecting part, the length of the second smoke collecting part is less than that of the first smoke collecting part, a box body is arranged in the smoke collecting cavity, the box body is arranged on the top of the smoke collecting cavity and simultaneously communicates with the first smoke collecting part and the second smoke collecting part, and the second smoke collecting part forms a transition and drainage part between the first smoke collecting part and the fan, compared with the related art, the top of the smoke collecting cavity is contracted from both sides to the middle, the space on both sides of the top of the smoke collecting cavity is reduced, the vortex formed at the cavity on both sides is reduced, the air volume of the fan is improved, and the noise is reduced.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, specifically to range hoods. Background Technology

[0002] Range hoods have become an essential kitchen appliance for home renovations. Currently, range hoods on the market are generally divided into T-type and side-draft types, but both have user pain points: T-type range hoods are prone to head bumping; side-draft range hoods offer limited operating space, and cooking grease splatters onto the bottom of the hood or the back wall, making cleaning difficult or impossible; after cooking, the air inlet remains open, and residual oil droplets inside the hood drip down the glass onto the lower air inlet glass, causing re-contamination of the cleaned glass. The L-shaped range hood structure is another form that integrates the structures of T-type and side-draft range hoods.

[0003] In related technologies, a "seven-shaped" range hood typically uses a smoke collection hood to form a smoke-gathering chamber, which collects the cooking fumes before expelling them outdoors. For example... Figure 1 , Figure 2 and Figure 3 As shown, the top of its smoke collection chamber is a fully open cavity. When the fumes enter the range hood housing, some of the fumes enter the sides of the smoke collection chamber and cannot directly enter the fan inlet along the flow channel. This results in poor smoke collection effect of the range hood and easily forms vortices on both sides of the smoke collection chamber, which reduces the air volume of the range hood and increases the noise of the range hood. Summary of the Invention

[0004] In view of this, the present invention provides a range hood to solve the problem in related technologies that vortices are easily formed on both sides of the smoke collection chamber, resulting in a reduction in the air volume of the range hood.

[0005] This invention provides a range hood, comprising:

[0006] The smoke collection chamber includes a first smoke collection part and a second smoke collection part. The first smoke collection part is provided with a smoke inlet. The second smoke collection part is connected to the top side of the first smoke collection part and communicates with the first smoke collection part. The length of the second smoke collection part is less than the length of the first smoke collection part.

[0007] The housing contains a fan and is located at the top of the smoke collection chamber, communicating with both the first and second smoke collection sections.

[0008] The second smoke collection section forms a transition and diversion section between the first smoke collection section and the fan.

[0009] Beneficial effects: Since the second smoke collection part is connected to the top side of the first smoke collection part and communicates with the first smoke collection part, the length of the second smoke collection part is less than the length of the first smoke collection part. Compared with related technologies, the top two sides of the smoke collection cavity shrink towards the middle, the space on the top two sides of the smoke collection cavity is reduced, the vortex formed in the cavity on both sides is reduced, the fan air volume is increased, and the noise is reduced.

[0010] In one optional embodiment, the fan includes a volute, the distance between the rear end of the volute and the rear plate of the housing is a, and the distance between the front wall and the rear wall of the first smoke collection part at the smoke inlet is h, where h≤a≤1.2h.

[0011] Beneficial effects: Since the value of 'a' directly affects the air intake capacity of the main air intake side corresponding to the first flow channel, if 'a' is too small, the air intake area of ​​the first flow channel will decrease, and the fan performance will decline. If 'a' is too large, the airflow into the fan from the main air intake side corresponding to the first flow channel will have a large bend, which will also reduce the fan performance. Furthermore, if 'a' is too large, it will affect the air intake of the secondary air intake side corresponding to the second flow channel, further reducing the fan performance. Therefore, 'a' being between h and 1.2h can ensure the air intake capacity of the main air intake side while also ensuring the fan performance.

[0012] In one optional embodiment, the second smoke collection part is provided with an oil guide plate, which is inclined downward from front to back, and the minimum vertical distance between the bottom of the volute and the oil guide plate is b, where 0 < b ≤ 50 mm.

[0013] Beneficial effects: The oil guide plate guides the flow of oil, facilitating oil collection. Since the minimum vertical distance between the bottom of the volute and the oil guide plate is between 0 and 50 mm, the distance between them is small, which shortens the distance between the bottom plate of the second smoke collection section and the housing. Compared to related technologies, this provides users with more operating space.

[0014] In one optional embodiment, the rear end of the oil guide plate is located at the position where the bottom surface of the second smoke gathering part connects with the first smoke gathering part, and the first smoke gathering part is provided with a flow guide plate, the top end of which is connected to the oil guide plate.

[0015] Beneficial effects: By setting a guide plate in the first smoke collection section, with the top of the guide plate connected to the oil guide plate, the guide plate can collect the grease dripping from the oil guide plate and guide the grease into the oil cup.

[0016] In one optional embodiment, the second smoke-collecting part is connected to the middle of the first smoke-collecting part, the distance between the side of the second smoke-collecting part and the side of the first smoke-collecting part is c, the width of the range hood is L, the width of the housing is f, and 0.15(Lf)≤c≤0.5(Lf).

[0017] Beneficial effects: The higher the value of c, the less material is used in the range hood body, saving material costs. It can also reduce the space on both sides of the top of the smoke collection chamber, reduce the vortex on both sides, improve the intake efficiency, increase the fan air volume, and reduce noise.

[0018] In one alternative implementation, the first smoke-collecting part is a flat cuboid shape.

[0019] Beneficial effects: Since the first smoke collection section is a flat rectangular shape, the top is relatively narrow, which has little impact on the third and fourth flow channels on both sides. This can reduce eddies, improve inlet efficiency, increase fan air volume, and reduce noise.

[0020] In one optional embodiment, a smoke baffle is provided at the smoke inlet.

[0021] Beneficial effects: The smoke baffle can guide the fumes into the smoke collection chamber, while preventing the fumes from flowing upwards and causing pollution to the controller and lighting.

[0022] In one optional embodiment, the first smoke collection section is further provided with a smoke guide plate, one end of which is located below the smoke inlet, and the other end extends upward at an angle.

[0023] Beneficial effect: The smoke guide plate can guide the oil fumes to flow upward after they enter the smoke inlet.

[0024] In one alternative embodiment, a controller is provided on the front side of the second smoke collection part.

[0025] Beneficial effects: The controller settings make it easier for users to operate the range hood.

[0026] In one alternative embodiment, a lighting lamp is provided on the lower side of the second smoke collection part.

[0027] Beneficial effect: The lighting provides illumination for users while cooking, making the cooking process easier. Attached Figure Description

[0028] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is a structural diagram of a range hood in related technologies;

[0030] Figure 2 for Figure 1The side view of the range hood shown;

[0031] Figure 3 for Figure 1 The diagram shows the direction of oil fume flow from the range hood.

[0032] Figure 4 This is a schematic diagram of the structure of a range hood according to an embodiment of the present invention;

[0033] Figure 5 for Figure 4 The side view of the range hood shown;

[0034] Figure 6 for Figure 4 The shown is a side sectional view of the range hood.

[0035] Figure 7 for Figure 4 The range hood shown is displayed as a side sectional view showing the direction of oil fume flow;

[0036] Figure 8 for Figure 4 The image shows a front sectional view of the range hood.

[0037] Figure 9 for Figure 4 The range hood shown is a front sectional view displaying the direction of oil fume flow.

[0038] Explanation of related technical figure markings:

[0039] 1a. Smoke collection chamber; 2a. Fan.

[0040] Explanation of reference numerals in the accompanying drawings of this invention:

[0041] 1. Smoke collection chamber; 101. First smoke collection section; 1011. Smoke inlet; 102. Second smoke collection section; 2. Housing; 201. Rear plate; 3. Fan; 301. Volute; 3011. Air inlet; 3012. Air outlet; 302. Impeller; 303. Motor; 4. Oil guide plate; 5. Flow guide plate; 6. Smoke baffle; 7. Smoke guide plate; 8. Controller; 9. Lighting; 10. First flow channel; 11. Second flow channel; 12. Third flow channel; 13. Fourth flow channel. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Range hoods have become an essential kitchen appliance for home renovations. Currently, range hoods on the market are generally divided into T-type and side-draft types, but both have user pain points: T-type range hoods are prone to head bumping; side-draft range hoods offer limited operating space, and cooking grease splatters onto the bottom of the hood or the back wall, making cleaning difficult or impossible; after cooking, the air inlet remains open, and residual oil droplets inside the hood drip down the glass onto the lower air inlet glass, causing re-contamination of the cleaned glass. The L-shaped range hood structure is another form that integrates the structures of T-type and side-draft range hoods.

[0044] In related technologies, a seven-shaped range hood typically uses a smoke collection hood to form a smoke-gathering chamber 1a, which collects the cooking fumes within the chamber before expelling them outdoors. For example... Figure 1 , Figure 2 and Figure 3 As shown, the top of the smoke collection chamber 1a is a fully open cavity. When the oil fumes enter the range hood housing, some of the oil fumes enter the sides of the smoke collection chamber 1a and cannot directly enter the air inlet of the fan 2a along the flow channel. This results in poor smoke collection effect of the range hood and easily forms vortices on both sides of the smoke collection chamber 1a, which reduces the air volume of the range hood and increases the noise of the range hood.

[0045] The following is combined with Figures 4 to 9 The following describes embodiments of the present invention.

[0046] According to an embodiment of the present invention, a range hood is provided, including a smoke collection chamber 1 and a housing 2.

[0047] The smoke collection chamber 1 includes a first smoke collection section 101 and a second smoke collection section 102. The first smoke collection section 101 has a smoke inlet 1011. The second smoke collection section 102 is connected to the top side of the first smoke collection section 101 and communicates with it. The length of the second smoke collection section 102 is less than the length of the first smoke collection section 101. A fan 3 is installed inside the housing 2. The housing 2 is located at the top of the smoke collection chamber 1 and communicates with both the first smoke collection section 101 and the second smoke collection section 102. The second smoke collection section 102 forms a transition and drainage section between the first smoke collection section 101 and the fan 3.

[0048] In this embodiment, since the second smoke collection part 102 is connected to the top side of the first smoke collection part 101 and communicates with the first smoke collection part 101, the length of the second smoke collection part 102 is less than the length of the first smoke collection part 101. Compared with related technologies, the top two sides of the smoke collection cavity 1 shrink towards the middle, the space on the top two sides of the smoke collection cavity 1 is reduced, the vortex formed in the cavity on both sides is reduced, the air volume of the fan 3 is increased, and the noise is reduced.

[0049] Specifically, such as Figure 7As shown, after the flue gas flows to the top of the smoke collection chamber 1, the flow path includes a first flow channel 10, a second flow channel 11, a third flow channel 12, and a fourth flow channel 13. The first flow channel 10 is located behind the fan 3, entering the volute 301 of the fan 3 through the rear side. The second flow channel 11 is located at the bottom of the fan 3, flowing forward through the bottom of the fan 3 and entering the volute 301 of the fan 3 through the front side. The third and fourth flow channels 12 and 13 are located on either side of the bottom of the fan 3. The simultaneous presence of these four flow channels optimizes the range hood's airflow, noise levels, and other performance characteristics. The order of influence of these four flow channels on the range hood's performance is: first flow channel > second flow channel > third flow channel > fourth flow channel. The dimensions of each flow channel can be adjusted according to specific circumstances.

[0050] In related technologies, such as Figure 3 As shown, due to the large space on both sides of the top of the smoke collection chamber 1a, eddies are likely to occur in the third and fourth flow channels, reducing the air volume of the fan 3a and increasing the noise of the range hood.

[0051] And this embodiment, such as Figure 9 As shown, the space on both sides of the top of the smoke collection chamber 1 is very small, and the third flow channel 12 and the fourth flow channel 13 are less likely to form vortices or the vortices are reduced, which can increase the air volume of the fan 3 and reduce noise.

[0052] In one embodiment, the fan 3 includes a volute 301, the distance between the rear end of the volute 301 and the rear plate 201 of the housing 2 is a, and the distance between the front wall and the rear wall of the first smoke collection part 101 at the smoke inlet 1011 is h, where h≤a≤1.2h.

[0053] In this embodiment, since the value of 'a' directly affects the air intake capacity of the main air intake side corresponding to the first flow channel 10, if 'a' is too small, the air intake area of ​​the first flow channel 10 will shrink, and the performance of the fan 3 will decrease. If 'a' is too large, the airflow into the fan 3 from the main air intake side corresponding to the first flow channel 10 will have a large bend, which will also reduce the performance of the fan 3. Furthermore, if 'a' is too large, it will affect the air intake of the secondary air intake side corresponding to the second flow channel 11, further reducing the performance of the fan 3. Therefore, 'a' being between h and 1.2h can ensure the air intake capacity of the main air intake side while also ensuring the performance of the fan 3.

[0054] In one specific embodiment, a = h.

[0055] Since the value of 'a' directly affects the air intake capacity of the main air intake side corresponding to the first flow channel 10, when 'a' is too small, the air intake area of ​​the first flow channel 10 shrinks, and the performance of the fan 3 decreases. When 'a' is too large, the airflow into the fan 3 from the main air intake side corresponding to the first flow channel 10 has a large bend, which also reduces the performance of the fan 3. Furthermore, when 'a' is too large, it will affect the air intake of the secondary air intake side corresponding to the second flow channel 11, further reducing the performance of the fan 3. Therefore, in this embodiment, 'a' equals 'h'. Verification has shown that this ensures both the air intake capacity of the main air intake side and the performance of the fan 3.

[0056] In one specific embodiment, a = 1.1h.

[0057] Since the value of 'a' directly affects the air intake capacity of the main air intake side corresponding to the first flow channel 10, when 'a' is too small, the air intake area of ​​the first flow channel 10 shrinks, and the performance of the fan 3 decreases. When 'a' is too large, the airflow into the fan 3 from the main air intake side corresponding to the first flow channel 10 has a large bend, which also reduces the performance of the fan 3. Furthermore, when 'a' is too large, it will affect the air intake of the secondary air intake side corresponding to the second flow channel 11, further reducing the performance of the fan 3. Therefore, in this embodiment, 'a' equals 1.1h. Verification has shown that this ensures the air intake capacity of the main air intake side while also ensuring the performance of the fan 3.

[0058] In one specific embodiment, a = 1.2h.

[0059] Since the value of 'a' directly affects the air intake capacity of the main air intake side corresponding to the first flow channel 10, when 'a' is too small, the air intake area of ​​the first flow channel 10 shrinks, and the performance of the fan 3 decreases. When 'a' is too large, the airflow into the fan 3 from the main air intake side corresponding to the first flow channel 10 has a large bend, which also reduces the performance of the fan 3. Furthermore, when 'a' is too large, it will affect the air intake of the secondary air intake side corresponding to the second flow channel 11, further reducing the performance of the fan 3. Therefore, in this embodiment, 'a' equals 1.2h. Verification has shown that this ensures both the air intake capacity of the main air intake side and the performance of the fan 3.

[0060] In one embodiment, the second smoke collection part 102 is provided with an oil guide plate 4, which is inclined downward from front to back. The minimum vertical distance between the bottom of the volute 301 and the oil guide plate 4 is b, where 0 < b ≤ 50 mm.

[0061] In this embodiment, the oil guide plate 4 guides the flow of oil, facilitating oil collection. Since the minimum vertical distance between the bottom of the volute 301 and the oil guide plate 4 is between 0 and 50 mm, the distance between them is small, which shortens the distance between the bottom plate of the second smoke collection section 102 and the housing 2. Compared to related technologies, this provides a larger operating space for the user.

[0062] It should be noted that the user operating space refers to the space between the second smoke collection unit 102 and the stove.

[0063] Specifically, the larger the value of b, the smaller the user operation space and the larger the space of the second flow channel 11; the smaller the value of b, the smaller the user operation space and the smaller the space of the second flow channel 11.

[0064] In one specific embodiment, b is 10 mm.

[0065] In this embodiment, the distance between the bottom of the volute 301 and the oil guide plate 4 is small, which can shorten the distance between the bottom plate of the second smoke collection part 102 and the housing 2. Compared with related technologies, the user's operating space is larger.

[0066] In one specific embodiment, b is 20 mm.

[0067] In this embodiment, the distance between the bottom of the volute 301 and the oil guide plate 4 is small, which can shorten the distance between the bottom plate of the second smoke collection part 102 and the housing 2. Compared with related technologies, the user's operating space is larger.

[0068] In one specific embodiment, b is 30 mm.

[0069] In this embodiment, the distance between the bottom of the volute 301 and the oil guide plate 4 is small, which can shorten the distance between the bottom plate of the second smoke collection part 102 and the housing 2. Compared with related technologies, the user's operating space is larger.

[0070] In one specific embodiment, b is 40 mm.

[0071] In this embodiment, the distance between the bottom of the volute 301 and the oil guide plate 4 is small, which can shorten the distance between the bottom plate of the second smoke collection part 102 and the housing 2. Compared with related technologies, the user's operating space is larger.

[0072] In one specific embodiment, b is 50 mm.

[0073] In this embodiment, the distance between the bottom of the volute 301 and the oil guide plate 4 is small, which can shorten the distance between the bottom plate of the second smoke collection part 102 and the housing 2. Compared with related technologies, the user's operating space is larger.

[0074] In one embodiment, the rear end of the oil guide plate 4 is located at the position where the bottom surface of the second smoke collection part 102 connects with the first smoke collection part 101. The first smoke collection part 101 is provided with a flow guide plate 5, and the top end of the flow guide plate 5 is connected to the oil guide plate 4.

[0075] In this embodiment, a guide plate 5 is provided in the first smoke collection part 101. The top end of the guide plate 5 is connected to the oil guide plate 4. The guide plate 5 can collect the grease dripping from the oil guide plate 4 and guide the grease into the oil cup.

[0076] Specifically, the fan 3 includes a volute 301, a fan wheel 302, and a motor 303. The volute 301 has an air inlet 3011 and an air outlet 3012. The air inlet 3011 is located in the middle of the volute 301, and the air outlet 3012 is located at the top of the volute 301.

[0077] In one embodiment, the second smoke collection part 102 is connected to the middle of the first smoke collection part 101, the distance between the side of the second smoke collection part 102 and the side of the first smoke collection part 101 is c, the width of the range hood is L, the width of the housing 2 is f, and 0.15(Lf)≤c≤0.5(Lf).

[0078] In one embodiment, the larger the value of c, the less material is used in the range hood body, saving material costs. It can also reduce the space on both sides of the top of the smoke collection chamber 1, reduce the vortex on both sides, improve the intake efficiency, increase the air volume of the fan 3, and reduce noise.

[0079] In one specific embodiment, c = 0.15(Lf).

[0080] In this embodiment, compared with related technologies, the range hood body uses less material, saving material costs, and the space on both sides of the top of the smoke collection chamber 1 can be reduced, thereby reducing the vortex on both sides, improving the intake efficiency, increasing the air volume of the fan 3, and reducing noise.

[0081] In one specific embodiment, c = 0.2(Lf).

[0082] In this embodiment, compared with related technologies, the range hood body uses less material, saving material costs, and the space on both sides of the top of the smoke collection chamber 1 can be reduced, thereby reducing the vortex on both sides, improving the intake efficiency, increasing the air volume of the fan 3, and reducing noise.

[0083] In one specific embodiment, c = 0.25(Lf).

[0084] In this embodiment, compared with related technologies, the range hood body uses less material, saving material costs, and the space on both sides of the top of the smoke collection chamber 1 can be reduced, thereby reducing the vortex on both sides, improving the intake efficiency, increasing the air volume of the fan 3, and reducing noise.

[0085] In one specific embodiment, c = 0.35(Lf).

[0086] In this embodiment, compared with related technologies, the range hood body uses less material, saving material costs, and the space on both sides of the top of the smoke collection chamber 1 can be reduced, thereby reducing the vortex on both sides, improving the intake efficiency, increasing the air volume of the fan 3, and reducing noise.

[0087] In one specific embodiment, c = 0.45(Lf).

[0088] In this embodiment, compared with related technologies, the range hood body uses less material, saving material costs, and the space on both sides of the top of the smoke collection chamber 1 can be reduced, thereby reducing the vortex on both sides, improving the intake efficiency, increasing the air volume of the fan 3, and reducing noise.

[0089] In one specific embodiment, c = 0.5(Lf).

[0090] In this embodiment, compared with related technologies, the range hood body uses less material, saving material costs, and the space on both sides of the top of the smoke collection chamber 1 can be reduced, thereby reducing the vortex on both sides, improving the intake efficiency, increasing the air volume of the fan 3, and reducing noise.

[0091] In one embodiment, the first smoke collection part 101 is a flat cuboid shape.

[0092] In this embodiment, since the first smoke collection part 101 is a flat cuboid shape, the top is relatively narrow, which has little impact on the third flow channel 12 and the fourth flow channel 13 on both sides. This can reduce eddies, improve the inlet efficiency, increase the air volume of the fan 3, and reduce noise.

[0093] In one embodiment, the second smoke-collecting part 102 is cuboid in shape, and the top end of the second smoke-collecting part 102 is flush with the top end of the first smoke-collecting part 101.

[0094] In one embodiment, a smoke baffle 6 is provided at the smoke inlet 1011.

[0095] In this embodiment, the smoke baffle 6 can guide the oil fumes into the smoke collection chamber 1, while preventing the oil fumes from flowing upward and causing pollution to the controller 8 and the lighting lamp 9.

[0096] In one embodiment, the first smoke collection part 101 is further provided with a smoke guide plate 7, one end of which is located on the lower side of the smoke inlet 1011, and the other end extends upward at an angle.

[0097] In this embodiment, the smoke guide plate 7 is designed to guide the oil fumes upward after they enter the smoke inlet 1011.

[0098] In one embodiment, a controller 8 is provided on the front side of the second smoke collection section 102.

[0099] In this embodiment, the controller 8 is configured to facilitate user operation of the range hood.

[0100] In one embodiment, a lighting lamp 9 is provided on the lower side of the second smoke collection part 102.

[0101] In this embodiment, the lighting lamp 9 is provided to provide illumination for the user while cooking, making cooking easier.

[0102] In one specific embodiment, the fan 3 includes a volute 301, the distance between the volute 301 and the rear plate 201 of the housing 2 is 'a', the thickness of the first smoke-collecting part 101 at the smoke inlet 1011 is 'h', h≤a≤1.2h; the second smoke-collecting part 102 is provided with an oil guide plate 4, which is inclined downwards from front to back, the minimum vertical distance between the bottom of the volute 301 and the oil guide plate 4 is 'b', 0<b≤50mm; the second smoke-collecting part is connected to the middle of the first smoke-collecting part 101, the distance between the side of the second smoke-collecting part 102 and the side of the first smoke-collecting part 101 is 'c', the height of the range hood is 'L', and the width of the housing 2 is 'f', 0.15(Lf)≤c≤0.5(Lf). This improves the utilization rate of the top cavity, thereby enhancing the performance of the range hood and reducing its material costs.

[0103] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A range hood, characterized in that, include: The smoke collection chamber (1) includes a first smoke collection part (101) and a second smoke collection part (102). The first smoke collection part (101) is provided with a smoke inlet (1011). The second smoke collection part (102) is connected to the top side of the first smoke collection part (101) and communicates with the first smoke collection part (101). The length of the second smoke collection part (102) is less than the length of the first smoke collection part (101). The housing (2) contains a fan (3). The housing (2) is located at the top of the smoke collection chamber (1) and is connected to both the first smoke collection part (101) and the second smoke collection part (102). The second smoke collection part (102) forms a transition and diversion part between the first smoke collection part (101) and the fan (3); the second smoke collection part (102) is connected to the middle part of the first smoke collection part (101), the distance between the side of the second smoke collection part (102) and the side of the first smoke collection part (101) is c, the width of the range hood is L, the width of the box (2) is f, 0.15 (Lf) ≤ c ≤ 0.5 (Lf).

2. The range hood according to claim 1, characterized in that, The fan (3) includes a volute (301), the distance between the rear end of the volute (301) and the rear plate (201) of the housing (2) is a, and the distance between the front wall and the rear wall of the first smoke collection part (101) at the smoke inlet (1011) is h, where h≤a≤1.2h.

3. The range hood according to claim 2, characterized in that, The second smoke collection part (102) is provided with an oil guide plate (4). From front to back, the oil guide plate (4) is inclined downward. The minimum vertical distance between the bottom of the volute (301) and the oil guide plate (4) is b, where 0 < b ≤ 50 mm.

4. The range hood according to claim 3, characterized in that, The rear end of the oil guide plate (4) is located at the position where the bottom surface of the second smoke gathering part (102) connects with the first smoke gathering part (101). The first smoke gathering part (101) is provided with a flow guide plate (5), and the top end of the flow guide plate (5) is connected to the oil guide plate (4).

5. The range hood according to any one of claims 1 to 4, characterized in that, The first smoke collection part (101) is a flat cuboid shape.

6. The range hood according to any one of claims 1 to 4, characterized in that, A smoke baffle (6) is provided at the smoke inlet (1011).

7. The range hood according to any one of claims 1 to 4, characterized in that, The first smoke collection part (101) is also provided with a smoke guide plate (7), one end of which is located on the lower side of the smoke inlet (1011), and the other end extends upward at an angle.

8. The range hood according to any one of claims 1 to 4, characterized in that, A controller (8) is provided on the front side of the second smoke collection part (102).

9. The range hood according to any one of claims 1 to 4, characterized in that, A lighting lamp (9) is provided on the lower side of the second smoke collection part (102).

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