Range hood

Abstract

The utility model provides a kind of range hood, the range hood includes smoke collecting hood and fan system being communicated with each other, the smoke collecting hood includes head-to-tail connected fuselage and aircraft nose, the fuselage extends along the height direction of the smoke collecting hood, the aircraft nose extends along the width direction of the smoke collecting hood, the smoke collecting hood further includes first baffle, the first baffle is embedded in the smoke collecting hood and is set corresponding with the air inlet direction of the smoke collecting hood, the first baffle is set apart along the air inlet direction of the smoke collecting hood with the air inlet end of the smoke collecting hood, the outer edge of the first baffle located in the aircraft nose is set apart with the side wall of the aircraft nose and forms first annular air inlet, the outer edge of the first baffle located in the fuselage is set apart with the side wall of the fuselage and forms second annular air inlet.

Description

Technical Field

[0001] This utility model specifically relates to a range hood. Background Technology

[0002] A range hood is an electrical appliance used to purify kitchen air. Based on its air inlet type, it can be divided into top-mounted, side-mounted, and top-and-side dual-suction types. The top-and-side dual-suction type is a newer composite design, often referred to as "L-shaped" or "7-shaped," which is equivalent to having both top and side suction inlets. This design can simultaneously draw in cooking fumes from two directions, effectively reducing the spread of fumes within the kitchen space and improving the range hood's capture efficiency.

[0003] Compared to top-mounted range hoods, existing top-mounted dual-suction range hoods have a smaller front-to-back size and a smaller horizontal smoke collection area. Generally, the side-mounted intake is the main air inlet, and the top intake is the auxiliary air inlet. Both the main and auxiliary air inlets are typically rectangular holes located in the middle of the air intake side of the smoke collection hood. Under low flow conditions, the top intake is the dominant intake, resulting in relatively better smoke collection efficiency, while under high flow conditions, the opposite is true. Therefore, for range hoods with a smaller front-to-back size, when switching between different flow conditions, such as a sudden increase in smoke volume from a low flow rate, an imbalance in negative pressure between the two air inlets can easily occur. This causes the side intake, which should have a larger air volume, to have a lower air volume, resulting in the top intake being unable to capture and remove the smoke in time when the side intake has a smaller air volume, leading to smoke escape. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defect in the existing technology of top and side dual-suction range hoods where the negative pressure imbalance at the air inlet causes the side suction air inlet to have a low air volume ratio, which makes it impossible for the top suction air inlet to expel the oil fumes in time, resulting in the escape of oil fumes. This utility model provides a range hood.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] A range hood includes a smoke collection hood and a fan system connected to each other. The smoke collection hood includes a body and a fan head connected end to end. The body extends along the height direction of the smoke collection hood, and the fan head extends along the width direction of the smoke collection hood. The smoke collection hood also includes a first guide plate. The first guide plate is embedded in the smoke collection hood and is arranged corresponding to the air inlet direction of the smoke collection hood. The air inlet ends of the first guide plate and the smoke collection hood are spaced apart along the air inlet direction of the smoke collection hood. The outer edge of the first guide plate located in the fan head is spaced apart from the side wall of the fan head to form a first annular air inlet. The outer edge of the first guide plate located in the body is spaced apart from the side wall of the body to form a second annular air inlet.

[0007] In this solution, a first guide vane is installed to form a first annular air inlet in the area corresponding to the top suction, and a second annular air inlet in the area corresponding to the side suction. Compared to rectangular holes, the annular air inlets can capture the fumes escaping from both sides of the fume hood, achieving the purpose of smoke collection and exhaust. Furthermore, combined with the improved local flow and fume capture effect of the annular air inlets, the second annular air inlet can improve the problem of reduced airflow ratio of the side suction air inlets caused by negative pressure imbalance. At the same time, the first annular air inlet can effectively capture any escaping fumes when the smoke volume is large and the side suction airflow is low, thereby improving the user experience.

[0008] Preferably, the smoke hood further includes a second guide plate, which is disposed inside the fan head. The second guide plate is located on the outer edge of the fan head, away from the second annular air inlet of the first guide plate. The second guide plate extends along the height direction of the smoke hood and has an isosceles trapezoidal structure. The smaller end of the second guide plate is the same length as the fan system, and the larger end of the second guide plate is the same length as the outer edge of the first guide plate.

[0009] In this solution, the above settings are used to enhance the machine head's ability to capture oil fumes.

[0010] Preferably, the distance between the first guide plate located inside the machine head and the top plate of the smoke hood is greater than or equal to 20 mm, the distance between the first guide plate located inside the machine head and the air inlet end of the machine head is greater than or equal to 20 mm, and the height of the second guide plate along the height direction of the smoke hood is 0.5 times the distance between the first guide plate and the top plate of the smoke hood.

[0011] In this scheme, the above settings limit the distance between the first guide plate and the top plate of the smoke hood and the air inlet end of the machine head to ensure the air intake volume. At the same time, the size of the second guide plate is limited to improve the flow field distribution inside the machine head.

[0012] Preferably, the first annular air inlet includes a first through hole extending along the width direction of the smoke hood and disposed on opposite sides of the width direction of the first guide plate, and a second through hole extending along the length direction of the smoke hood and disposed on the end of the first guide plate away from the second annular air inlet. The second through hole is a rectangular hole and the distance from the inner wall of the machine head is 15-30mm. The first through hole is a trapezoidal hole. The smaller end of the first through hole is connected to the second through hole. The smaller end of the first through hole is a1, and the larger end of the first through hole is b1, wherein 15mm≤a1≤b1≤40mm.

[0013] In this solution, the above-mentioned settings are used to reduce the escape of oil fumes from the two sides of the smoke hood in the width direction.

[0014] Preferably, the second annular air inlet includes a third through hole extending along the height direction of the smoke hood and disposed on opposite sides of the height direction of the first guide plate, and a fourth through hole extending along the length direction of the smoke hood and disposed on the end of the first guide plate away from the first annular air inlet. The two ends of the third through hole and the fourth through hole are connected, and the third through hole is connected to the first through hole. Along the length direction of the smoke hood, the value of the third through hole is in the range of 40-80mm, and along the height direction of the smoke hood, the value of the fourth through hole is in the range of 40-80mm.

[0015] In this solution, the above settings are used to improve the smoke extraction effect of the range hood.

[0016] Preferably, the smoke hood further includes a baffle plate, which is disposed inside the body and parallel to the rear plate of the smoke hood. The baffle plate is disposed corresponding to the third through hole and the fourth through hole. Along the length direction and / or width direction of the smoke hood, the size of the baffle plate is 1-1.2 times the size of the third through hole or the fourth through hole.

[0017] In this solution, the above-mentioned settings are used to enhance the drag force of the second annular air inlet on the fumes and to provide a certain degree of shielding against the outward transmission of noise from inside the fume hood.

[0018] Preferably, the cross-section of the body is trapezoidal, with the smaller end of the body facing away from the head. Along the width of the smoke hood, the smaller end of the body ranges from 60 to 120 mm, and along the height of the smoke hood, the height of the body ranges from 200 to 500 mm.

[0019] In this solution, the above-mentioned settings are used to further enhance the machine's ability to capture oil fumes.

[0020] Preferably, the distance between the first guide plate located inside the fuselage and the air inlet end of the fuselage is 30-60mm.

[0021] In this solution, the above-mentioned settings are used to shield the cross-flow of the first annular air inlet and the second annular air inlet, thereby improving the anti-interference capability of the second annular air inlet.

[0022] Preferably, the first guide vane located inside the fuselage forms an angle θ with the rear plate of the smoke hood, and the angle θ ranges from 5 to 55°.

[0023] In this solution, the above-mentioned settings are used to improve the flow effect of the first guide plate on the oil fumes, so that they can be quickly captured by the first annular air inlet and the second annular air inlet.

[0024] Preferably, the first guide plate located at the connection between the body and the head has an arc-shaped cross-section, and the radius of the arc-shaped structure is in the range of 40-80mm. The first guide plate located at the connection between the body and the head has a third air inlet corresponding to the air inlet direction. Along the length of the smoke hood, the length of the third air inlet is in the range of 600-800mm, and along the width of the smoke hood, the width of the third air inlet is in the range of 10-20mm.

[0025] In this solution, the above-mentioned settings are used to mitigate the spread of rising fumes after they hit the first guide plate, thereby improving the fume collection efficiency of the range hood.

[0026] The positive and progressive effects of this invention are as follows: By setting a first guide plate, a first annular air inlet is formed in the area corresponding to the top suction, and a second annular air inlet is formed in the area corresponding to the side suction. Compared with rectangular holes, the annular air inlets can capture the oil fumes escaping from both sides of the fume hood, achieving the purpose of smoke collection and exhaust. Furthermore, combined with the improved local flow and oil fume capture effect of the annular air inlets, the second annular air inlet can improve the problem of reduced airflow ratio of the side suction air inlets caused by negative pressure imbalance. At the same time, the first annular air inlet can effectively capture the oil fumes that may escape when the smoke volume is large and the side suction airflow is low, thereby improving the user experience. Attached Figure Description

[0027] Figure 1 This is a perspective view of a range hood according to a preferred embodiment of the present invention.

[0028] Figure 2 This is a diagram showing the positional relationship of the first guide plate located inside the head of a preferred embodiment of the present invention.

[0029] Figure 3 This is a diagram showing the positional relationship of the first guide vane located inside the fuselage in a preferred embodiment of the present invention.

[0030] Figure 4 This is a schematic diagram of the fuselage of a preferred embodiment of the present invention.

[0031] Figure 5 This is a schematic diagram of the structure of the first annular air inlet of a preferred embodiment of the present invention.

[0032] Figure 6This diagram shows the positional relationship between the second guide plate and the first guide plate in a preferred embodiment of the present invention.

[0033] Figure 7 This is a schematic diagram of the structure of the second annular air inlet in a preferred embodiment of the present invention.

[0034] Figure 8 This is a schematic diagram of the spoiler structure of a preferred embodiment of the present invention.

[0035] Figure 9 This diagram shows the positional relationship between the third air inlet and the first guide plate in a preferred embodiment of the present invention.

[0036] Figure 10 This is a schematic diagram of the structure of the first guide plate in a preferred embodiment of the present invention.

[0037] Explanation of reference numerals in the attached figures:

[0038] Smoke hood 1

[0039] fuselage 11

[0040] Nose 12

[0041] First deflector plate 13

[0042] Top plate 14

[0043] Back panel 15

[0044] Fan System 2

[0045] First annular air inlet 3

[0046] First through hole 31

[0047] Second through hole 32

[0048] Second annular air inlet 4

[0049] Third through hole 41

[0050] Fourth through hole 42

[0051] Second guide vane 5

[0052] Spoiler 6

[0053] Transition section 7

[0054] Third air inlet 8 Detailed Implementation

[0055] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0056] This embodiment provides a range hood, the specific structure of which is as follows: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, the range hood includes a smoke collection hood 1 and a fan system 2 that are connected to each other. The smoke collection hood 1 includes a body 11 and a head 12 that are connected end to end. The body 11 extends along the height direction of the smoke collection hood 1, and the head 12 extends along the width direction of the smoke collection hood 1. The smoke collection hood 1 also includes a first guide plate 13. The first guide plate 13 is embedded in the smoke collection hood 1 and is set in accordance with the air inlet direction of the smoke collection hood 1. The first guide plate 13 and the air inlet end of the smoke collection hood 1 are spaced apart along the air inlet direction of the smoke collection hood 1. The outer edge of the first guide plate 13 located in the head 12 is spaced apart from the side wall of the head 12 to form a first annular air inlet 3. The outer edge of the first guide plate 13 located in the body 11 is spaced apart from the side wall of the body 11 to form a second annular air inlet 4.

[0057] Specifically, the body 11 extends along the height direction of the fume hood 1 for side suction of oil fumes, and the head 12 extends along the width direction of the fume hood 1 for top suction of oil fumes. The body 11 and the head 12, connected end to end, are interconnected to form a complete fume hood 1. The first guide plate 13 is an integrally formed plate and its size is smaller than the air inlet size of the body 11 and the head 12. The first guide plate 13 is embedded in the fume hood 1 along the air inlet direction of the fume hood 1, and is spaced apart from the air inlet of the body 11 and the head 12 along the air inlet direction of the fume hood 1, that is, it is recessed from the air inlet of the body 11 and the head 12 into the fume hood 1. Furthermore, the outer edge of the first guide plate 13 located inside the head 12 is spaced apart from the side wall of the head 12 to form a first annular air inlet 3, which is U-shaped. Similarly, the outer edge of the first guide plate 13 located inside the body 11 is spaced apart from the side wall of the body 11 to form a second annular air inlet 4, which is also U-shaped. By setting the first guide plate 13, a first annular air inlet 3 is formed in the area corresponding to the top suction, and a second annular air inlet 4 is formed in the area corresponding to the side suction. Compared with rectangular holes, the annular air inlets can capture the oil fumes escaping from both sides of the fume hood 1, achieving the purpose of smoke collection and exhaust.

[0058] Furthermore, when the operating condition changes from a small flow rate to a large flow rate, the first annular air inlet 3, which effectively captures fumes in the top suction area under low flow rate conditions, increases the amount of fumes captured (i.e., the fume adsorption flow rate) by utilizing its U-shaped opening. Additionally, the second annular air inlet 4, also with a U-shaped opening, correspondingly increases the fume adsorption flow rate compared to the rectangular opening. This means that when the fume volume increases, what originally flowed into the first annular air inlet 3 can be captured by the second annular air inlet 4. This allows the second annular air inlet 4 to mitigate the problem of reduced airflow proportion in the side suction inlet caused by negative pressure imbalance, thus increasing the side suction airflow proportion. Simultaneously, the first annular air inlet 3 can effectively capture any fumes that might escape when the fume volume is high and the side suction airflow is low, thereby improving the user experience.

[0059] like Figure 6 As shown, in this embodiment, the smoke hood 1 also includes a second guide plate 5. The second guide plate 5 is disposed inside the head 12. The second guide plate 5 is located on the outer edge of the head 12, away from the second annular air inlet 4 and located inside the head 12. The second guide plate 5 extends along the height direction of the smoke hood 1. The second guide plate 5 has an isosceles trapezoidal structure. The smaller end of the second guide plate 5 is the same length as the fan system 2, and the larger end of the second guide plate 5 is the same length as the outer edge of the first guide plate 13.

[0060] Specifically, the second guide plate 5 is disposed inside the head unit 12 and located between the first guide plate 13 and the top plate 14 of the fume hood 1. The second guide plate 5 is an isosceles trapezoid with its larger end connected to the outer edge of the first guide plate 13 away from the second annular air inlet 4. The height direction of the second guide plate 5 coincides with the height direction of the fume hood. When the fumes flow into the head unit 12 from the first annular air inlet 3, they are guided by the second guide plate 5, which also prevents the fumes inside the head unit 12 from overflowing outward from the first annular air inlet 3. This ensures that, in cases of high fume generation, the fumes are captured by the first annular air inlet 3 and prevented from escaping, thereby enhancing the fume capture capacity of the head unit 12.

[0061] like Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, in this embodiment, the distance between the first guide plate 13 located inside the head 12 and the top plate 14 of the smoke hood 1 is greater than or equal to 20mm, the distance between the first guide plate 13 located inside the head 12 and the air inlet end of the head 12 is greater than or equal to 20mm, and the height of the second guide plate 5 along the height direction of the smoke hood 1 is 0.5 times the distance between the first guide plate 13 and the top plate 14 of the smoke hood 1.

[0062] Specifically, the first guide plate 13 located inside the head 12 is arranged parallel to the top plate 14 and is located between the top plate 14 and the air inlet end of the head 12, and the end face of the first guide plate 13 is parallel to the air inlet end of the head 12. The first guide plate 13 can be connected to the top plate 14 through a connecting rod in the prior art to be embedded in the head 12. This is prior art and will not be described in detail here. The distance between the first guide plate 13 located inside the head 12 and the top plate 14 of the smoke hood 1 is SU, where SU ≥ 20 mm. The distance between the first guide plate 13 located inside the head 12 and the air inlet end of the head 12 is SD, where SD ≥ 20 mm. The height of the second guide plate 5 is H0, where H0 = 0.5SU. By limiting the distance between the first guide plate 13 and the top plate 14 of the smoke hood 1 and the air inlet end of the head 12, the air intake volume is guaranteed. At the same time, limiting the size of the second guide plate 5 improves the flow field distribution inside the head 12 and enhances the efficiency of capturing oil fumes.

[0063] like Figure 5 As shown, in this embodiment, the first annular air inlet 3 includes a first through hole 31 extending along the width direction of the smoke hood 1 and disposed on opposite sides of the width direction of the first guide plate 13, and a second through hole 32 extending along the length direction of the smoke hood 1 and disposed on the end of the first guide plate 13 away from the second annular air inlet 4. The second through hole 32 is a rectangular hole and the distance from the inner wall of the head 12 is 15-30mm. The first through hole 31 is a trapezoidal hole. The smaller end of the first through hole 31 is connected to the second through hole 32. The smaller end of the first through hole 31 is a1, and the larger end of the first through hole 31 is b1, wherein 15mm≤a1≤b1≤40mm.

[0064] Specifically, the second through hole 32 is a rectangular hole and is located on the outer edge of the first guide plate 13 away from the second annular air inlet 4. The two ends of the second through hole 32 extend along the width direction of the smoke collection hood 1 and have two first through holes 31. The first through hole 31 is a trapezoidal hole. The smaller end of the trapezoidal hole is a1 and is connected to the end of the rectangular hole. The larger end of the trapezoidal hole is b1 and is away from the rectangular hole. Compared with the rectangular hole, the trapezoidal hole has a larger smoke collection range and the amount of oil smoke passing through the first through hole 31 can also be increased accordingly, thereby reducing the escape of oil smoke from the sides of the smoke collection hood 1 in the width direction.

[0065] In this embodiment, the second annular air inlet 4 includes a third through hole 41 extending along the height direction of the smoke hood 1 and disposed on opposite sides of the height direction of the first guide plate 13, and a fourth through hole 42 extending along the length direction of the smoke hood 1 and disposed on the end of the first guide plate 13 away from the first annular air inlet 3. The two ends of the third through hole 41 and the fourth through hole 42 are connected, and the third through hole 41 is connected to the first through hole 31. Along the length direction of the smoke hood 1, the value range of the third through hole 41 is 40-80mm, and along the height direction of the smoke hood 1, the value range of the fourth through hole 42 is 40-80mm.

[0066] Specifically, a transition portion 7 of the first guide plate 13 is provided between the first annular air inlet 3 and the second annular air inlet 4. The transition portion 7 corresponds to the area where the body 11 and the head 12 are connected and bent. Along the length of the smoke hood 1, the size of the transition portion 7 is larger than the size of the first guide plate 13, and it is integrally formed with the first guide plate 13. Along the length of the smoke hood, the transition portion 7 extends to the side wall of the smoke hood 1, so that the first guide plate 13 can be connected to the side wall of the smoke hood through the transition portion 7 to form an integral whole, that is, the first guide plate 13 is fixedly recessed in the smoke hood. In addition, both the third through hole 41 and the fourth through hole 42 are rectangular holes. The fourth through hole 42 is located on the outer edge of the first guide plate 13 away from the first annular air inlet 3. The two ends of the fourth through hole 42 extend along the height direction of the smoke collection hood 1, with two third through holes 41. Compared with opening a rectangular hole in the middle area of ​​the first guide plate 13 of the body 11, the "U"-shaped hole formed by the interconnection of the third through hole 41 and the fourth through hole 42 has a larger range of oil fume adsorption. Furthermore, by limiting the size of the third through hole 41 and the fourth through hole 42, the flow of oil fume entering the second annular air inlet 4 is ensured to be sufficient, thereby improving the negative pressure imbalance problem that may exist when the side-suction oil fume of the body 11 faces the working condition of large smoke volume.

[0067] It should be noted that, since the internal cavities of the body 11 and the head 12 are interconnected, the first guide plate 13 is recessed inward and disposed in the smoke hood 1, and the first guide plate 13 is connected to the side wall of the smoke hood 1 through the transition part 7. The third through hole 41 near the first through hole 31 is interconnected through the internal cavities of the body 11 and the head 12, that is, the oil fumes flowing in from the first through hole 31 and the oil fumes flowing in from the third through hole 41 can come into contact in the cavity of the smoke hood 1 and then be sucked by the fan system 2.

[0068] like Figure 8 and Figure 10As shown, in this embodiment, the smoke hood 1 also includes a baffle 6. The baffle 6 is disposed inside the body 11 and is parallel to the rear plate 15 of the smoke hood 1. The baffle 6 is disposed corresponding to the third through hole 41 and the fourth through hole 42. Along the length direction and / or width direction of the smoke hood 1, the size of the baffle 6 is 1-1.2 times the size of the third through hole 41 or the fourth through hole 42.

[0069] Specifically, the baffle 6 is disposed between the rear plate 15 and the first guide plate 13. The baffle 6 extends along the height direction of the smoke hood 1 and is disposed corresponding to the third through hole 41 and the fourth through hole 42. The size of the baffle 6 along the length and width direction of the smoke hood 1 is greater than or equal to the size of the third through hole 41 or the fourth through hole 42, so that after the oil fumes enter the smoke hood 1 through the third through hole 41 or the fourth through hole 42, the baffle 6 enhances the drag force of the second annular air inlet 4 on the oil fumes and plays a certain shielding role against the outward transmission of noise inside the smoke hood 1.

[0070] In this embodiment, the cross-section of the body 11 is trapezoidal, and the smaller end of the body 11 is set away from the head 12. Along the width direction of the smoke hood 1, the value of the smaller end of the body 11 ranges from 60 to 120 mm, and along the height direction of the smoke hood 1, the value of the height of the body 11 ranges from 200 to 500 mm.

[0071] Specifically, the body 11 has a right-angled trapezoidal cross-section, with the right-angled side coinciding with the rear plate 15 and the top plate 14. The smaller end of the body 11 is away from the top plate 14, while the larger end faces the top plate 14 and is connected to the head 12. The sloping side of the body 11 is the side suction area of ​​the range hood. By limiting the size of the body 11, the ability of the body 11 to capture oil fumes is further improved.

[0072] In this embodiment, the distance between the first guide plate 13 located inside the fuselage 11 and the air inlet end of the fuselage 11 is 30-60mm. The distance between the first guide plate 13 located inside the fuselage 11 and the air inlet end of the fuselage 11 is the size of the first guide plate 13 recessed inward from the air inlet end of the fuselage 11. By limiting the size of the recess of the first guide plate 13 located inside the fuselage 11, the influence of the cross airflow of the first annular air inlet 3 and the second annular air inlet 4 is shielded, thereby improving the anti-interference capability of the second annular air inlet 4.

[0073] In this embodiment, the first guide plate 13 located inside the body 11 forms an angle θ with the rear plate 15 of the smoke collection hood 1, and the value of the angle θ ranges from 5 to 55°. By limiting the range of the angle, the guiding effect of the first guide plate 13 on the oil fumes is improved, so that they can be quickly captured by the first annular air inlet 3 and the second annular air inlet 4.

[0074] In this embodiment, the first guide plate 13 located at the connection between the body 11 and the head 12 has an arc-shaped cross-section, and the radius of the arc-shaped structure is 40-80mm. The first guide plate 13 located at the connection between the body 11 and the head 12 has a third air inlet 8 corresponding to the air inlet direction. Along the length of the smoke hood 1, the length of the third air inlet 8 is 600-800mm, and along the width of the smoke hood 1, the width of the third air inlet 8 is 10-20mm.

[0075] Specifically, the transition section 7 is located at the connection between the body 11 and the head unit 12. The cross-section of the transition section 7 is arc-shaped, meaning it has rounded corners. By limiting the range of the rounded corners of the arc-shaped structure, the fumes guided by the first guide plate 13 inside the body 11 can flow smoothly and steadily to the first guide plate 13 located inside the head unit 12. This reduces the spread of rising fumes after impacting the first guide plate 13, thus improving the fume collection efficiency of the range hood. In addition, the transition section 7 is also provided with a third air inlet 8. The third air inlet 8 is a rectangular hole that communicates with the internal cavity of the fume collection hood 1. This allows the fumes guided by the first guide plate 13 inside the body 11 to be captured through the third air inlet 8 as they flow towards the first guide plate 13 located inside the head unit 12, preventing the fumes from spreading and escaping, thus improving the fume collection effect and the user experience.

[0076] In addition, the range hood in this embodiment can also be controlled by a voice module. A controller, a voice receiving module, and a voice parsing module, which are in the prior art, can be installed on the panel of the range hood's smoke collection hood 1 away from the rear panel 15. The voice receiving module receives the user's instructions, and the voice parsing module parses the instructions. According to the parsed instructions, the controller starts or stops the range hood accordingly, thereby realizing intelligent control of the range hood and improving the user experience.

[0077] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A range hood comprising a hood and a fan system in communication with each other, characterized in that, The smoke hood includes a body and a head connected end to end. The body extends along the height direction of the smoke hood, and the head extends along the width direction of the smoke hood. The smoke hood also includes a first guide plate, which is embedded in the smoke hood and is arranged corresponding to the air inlet direction of the smoke hood. The air inlet end of the first guide plate and the smoke hood are spaced apart along the air inlet direction of the smoke hood. The outer edge of the first guide plate located at the head is spaced apart from the side wall of the head to form a first annular air inlet, and the outer edge of the first guide plate located at the body is spaced apart from the side wall of the body to form a second annular air inlet.

2. The hood as claimed in claim 1, wherein, The smoke hood also includes a second guide plate, which is disposed inside the head unit. The second guide plate is located on the outer edge of the head unit, away from the second annular air inlet of the first guide plate. The second guide plate extends along the height direction of the smoke hood and has an isosceles trapezoidal structure. The smaller end of the second guide plate is the same length as the fan system, and the larger end of the second guide plate is the same length as the outer edge of the first guide plate.

3. The hood as claimed in claim 2, wherein, The distance between the first guide plate located inside the machine head and the top plate of the smoke hood is greater than or equal to 20mm, the distance between the first guide plate located inside the machine head and the air inlet end of the machine head is greater than or equal to 20mm, and the height of the second guide plate along the height direction of the smoke hood is 0.5 times the distance between the first guide plate and the top plate of the smoke hood.

4. The hood as claimed in claim 3, wherein, The first annular air inlet includes a first through hole extending along the width direction of the smoke hood and disposed on opposite sides of the width direction of the first guide plate, and a second through hole extending along the length direction of the smoke hood and disposed on the end of the first guide plate away from the second annular air inlet. The second through hole is a rectangular hole and the distance from the inner wall of the machine head is 15-30mm. The first through hole is a trapezoidal hole. The smaller end of the first through hole is connected to the second through hole. The smaller end of the first through hole is a1, and the larger end of the first through hole is b1, wherein 15mm≤a1≤b1≤40mm.

5. The hood as claimed in claim 4, wherein, The second annular air inlet includes a third through hole extending along the height direction of the smoke hood and disposed on opposite sides of the height direction of the first guide plate, and a fourth through hole extending along the length direction of the smoke hood and disposed on the end of the first guide plate away from the first annular air inlet. The two ends of the third through hole and the fourth through hole are connected, and the third through hole is connected to the first through hole. Along the length direction of the smoke hood, the value of the third through hole ranges from 40 to 80 mm, and along the height direction of the smoke hood, the value of the fourth through hole ranges from 40 to 80 mm.

6. The hood according to claim 5, characterized in that The smoke hood also includes a baffle plate, which is disposed inside the body and parallel to the rear plate of the smoke hood. The baffle plate is disposed corresponding to the third through hole and the fourth through hole. Along the length direction and / or width direction of the smoke hood, the size of the baffle plate is 1-1.2 times the size of the third through hole or the fourth through hole.

7. The hood according to claim 1, wherein The cross-section of the body is trapezoidal, with the smaller end of the body facing away from the head. Along the width of the smoke hood, the smaller end of the body ranges from 60 to 120 mm, and along the height of the smoke hood, the height of the body ranges from 200 to 500 mm.

8. The hood according to claim 1, wherein The distance between the first guide plate located inside the fuselage and the air inlet end of the fuselage is 30-60mm.

9. The hood according to claim 1, wherein The first guide plate located inside the fuselage forms an angle θ with the rear plate of the smoke hood, and the value of the angle θ ranges from 5 to 55°.

10. The hood according to claim 1, wherein The first guide plate located at the connection between the fuselage and the head has an arc-shaped cross-section, and the radius of the arc-shaped structure is 40-80mm. The first guide plate located at the connection between the fuselage and the head has a third air inlet corresponding to the air inlet direction. Along the length of the smoke hood, the length of the third air inlet is 600-800mm, and along the width of the smoke hood, the width of the third air inlet is 10-20mm.

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