Range hood

Abstract

The present application belongs to the technical field of oil fume purification, and specifically discloses an oil fume extractor, which comprises a smoke collecting hood, a first flow guide member and a flow guide plate. The smoke collecting hood comprises two side plates, and a front panel and a back panel oppositely arranged at the front and back. The front panel, the back panel and the two side plates are used to form a side smoke collecting cavity. The flow guide plate is arranged in the side smoke collecting cavity and is inclined upward from bottom to top towards the back panel. The flow guide plate is spaced apart from the lower part of the front panel to form a first smoke inlet. The first flow guide member is arranged on the back of the front panel and above the first smoke inlet. The first flow guide member is formed with a first flow guide surface which is inclined upward from front to back. The bottom edge of the first flow guide surface is attached to the bottom edge of the front panel. The included angle a between the first flow guide surface and the front panel is smaller than the included angle b between the flow guide plate and the front panel. The oil fume extractor has good smoke suction effect.

Description

Technical Field

[0001] This invention relates to the field of oil fume purification technology, and in particular to an oil fume extractor. Background Technology

[0002] With the improvement of living standards, range hoods have gradually become an indispensable appliance in people's kitchens. Range hoods work on the principle of fluid dynamics, using a fan installed inside to quickly draw away harmful fumes from cooking and exhaust them outdoors, thus purifying the kitchen environment. Among them, top-mounted and side-mounted range hoods are widely used due to their aesthetic appeal, minimizing space encroachment on cooking areas, and their sufficiently low-positioned air intakes, allowing for timely extraction of fumes in the rising smoke area.

[0003] However, the smoke inlet at the bottom of the top-side dual-suction range hood is close to the stove, the internal flow channel of the range hood is long, the smoke extraction is not smooth, and eddies are easily generated on the back of the panel, resulting in low smoke extraction efficiency. Summary of the Invention

[0004] The technical problem solved by this invention is to provide a range hood that can improve smoke extraction efficiency.

[0005] The above-mentioned technical problems are solved by the following technical solutions:

[0006] A range hood includes a smoke collection hood, a baffle plate, and a first baffle. The smoke collection hood includes two side plates and a front panel and a back panel arranged opposite each other. The front panel, the back panel, and the two side plates form a side smoke collection chamber. The baffle plate is disposed in the side smoke collection chamber and is inclined upwards towards the back panel. The baffle plate and the lower part of the front panel are spaced apart to form a first smoke inlet. The first baffle is disposed on the back of the front panel and above the first smoke inlet. The first baffle has a first baffle surface that is inclined upwards from front to back. The bottom edge of the first baffle surface is attached to the bottom edge of the front panel, and the angle α between the first baffle surface and the front panel is smaller than the angle b between the baffle plate and the front panel.

[0007] Compared with the prior art, the range hood described in this invention has the following advantages: the range hood is equipped with a first guide component inside the smoke collection hood. After the smoke enters the side smoke collection chamber through the first smoke inlet, it flows towards the back panel under the guiding action of the guide plate and the first guide surface, reducing the impact with the panel near the first smoke inlet. The vortex is difficult to form near the first smoke inlet of the panel. That is, the setting of the first guide surface reduces the possibility of vortex formation near the first smoke inlet of the panel.

[0008] It is worth emphasizing that a channel for oil fumes to pass through is formed between the first guide surface and the guide plate. The angle 'a' between the first guide surface and the panel is smaller than the angle 'b' between the guide plate and the panel. This means that the channel formed by the first guide surface and the guide plate gradually expands away from the first smoke inlet. As a result, the oil fume flow velocity is reduced, the airflow is relatively more stable, and it is not easy to form eddies in the channel. In addition, the negative pressure formed at the first smoke inlet is high, and the suction power is enhanced, resulting in a better smoke extraction effect.

[0009] In one embodiment, the angle between the plane where the guide plate is located and the plane where the first guide surface is located is d, where 7°≤d≤15°.

[0010] In one embodiment, the outer surface of the first guide member has a structure that gradually tapers from front to back.

[0011] In one embodiment, the first guide element further includes a second guide surface and a third guide surface. The outer surface of the first guide surface and the first guide element is in the form of a triangular pyramid structure, and one side of the second guide surface and the third guide surface overlaps to form a ridge line M.

[0012] In one embodiment, the range hood further includes a fan and a fan cover. The fan cover is disposed on the top of the smoke collection hood and communicates with the side smoke collection chamber. The fan is located inside the fan cover. The outlet of the fan is offset from the central axis N of the panel perpendicular to the left and right direction. The orthographic projection of the perpendicular bisector of the bottom edge of the first guide surface toward the panel coincides with the central axis N. The ridge line M is offset from the central axis N toward the outlet of the fan.

[0013] In one embodiment, the first flow guide is converged into a single line, the first flow guide has a left-right symmetrical structure, and the longitudinal cross-section of the first flow guide is V-shaped or a streamlined shape that convexes towards the back plate.

[0014] In one embodiment, the range hood includes a second guide member and a third guide member, the second guide member and the third guide member being respectively attached to the left and right sides of the first guide member, the second guide member having a fifth guide surface, the third guide member having a sixth guide surface, and the bottom edges of the fifth guide surface and the sixth guide surface being attached to the top edge of the first smoke inlet;

[0015] The thickness of the second guide and the thickness of the third guide are both less than the thickness of the first guide, or the thickness of the second guide and the third guide gradually decreases from the end connected to the first guide to the other end.

[0016] In one embodiment, the range hood further includes a fan and a fan cover. The fan cover is disposed on the top of the smoke collection hood and communicates with the side smoke collection chamber. The fan is located inside the fan cover. The outlet of the fan is disposed off the central axis N perpendicular to the left and right direction of the panel. The symmetrical axis of the first guide member is off the central axis N on the side closer to the outlet direction of the fan.

[0017] In one embodiment, the range hood further includes an oil guide plate and an oil cup. The oil cup is disposed at the lower part of the smoke collection hood, and the oil guide plate is disposed below the first guide member. One end of the oil guide plate is connected to the panel, and the other end of the oil guide plate is gradually inclined downward from front to back. The oil guide plate is provided with a smoke inlet hole.

[0018] In one embodiment, the first flow guide member, together with the panel, forms a closed space, and the first flow guide member has a sound-absorbing hole and a sound-absorbing material is disposed inside the first flow guide member. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the range hood provided in an embodiment of the present invention;

[0020] Figure 2 This is a three-dimensional structural diagram of the range hood with its back panel hidden, provided in one embodiment of the present invention;

[0021] Figure 3 for Figure 2 A cross-sectional view of the range hood in the picture;

[0022] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0023] Figure 5 for Figure 2 A diagram showing the positional relationship between the control panel and the first air guide component of a range hood.

[0024] Figure 6 for Figure 5 Side view;

[0025] Figure 7 A diagram showing the positional relationship between the panel of a range hood and the first air guide component provided in another embodiment of the present invention;

[0026] Figure 8 This is a three-dimensional structural diagram of the range hood with its back panel hidden, provided in another embodiment of the present invention;

[0027] Figure 9 for Figure 8 A diagram showing the positional relationship between the control panel and the first air guide component of a range hood.

[0028] Figure 10 for Figure 9 Side view;

[0029] Figure 11 This is a three-dimensional structural diagram of the range hood with its hidden back panel provided in another embodiment of the present invention;

[0030] Figure 12 for Figure 11 A diagram showing the positional relationship between the fume extraction panel and the first, second, and third air guide components.

[0031] Figure 13 for Figure 12 Side view.

[0032] Label Explanation:

[0033] 1. Smoke hood; 11. Panel; 12. Back panel; 13. Side panel; 14. Top panel; 15. Lamp cover panel; 16. Control panel; 17. Side smoke collection chamber; 18. Top smoke collection chamber; 19. First smoke inlet; 110. Second smoke inlet; 21. Guide plate; 22. First guide component; 221. First guide surface; 222. Second guide surface; 223. Third guide surface; 224. Fourth guide surface; 23. Second guide component; 231. Fifth guide surface; 24. Third guide component; 241. Sixth guide surface; 3. Fan cover; 4. Oil guide plate; 41. Smoke inlet; 5. Fan; 6. Oil cup. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0036] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0038] By studying the smoke flow diagrams of existing top-side dual-suction range hoods, it was found that when rising fumes enter the range hood from the lower smoke inlet, the fluid flow direction changes, causing an impact near the lower smoke inlet on the panel. This results in gas backflow and the formation of vortices, leading to low suction efficiency in top-side dual-suction range hoods. Based on this, embodiments of the present invention propose a range hood that improves smoke extraction smoothness by reducing vortices near the lower smoke inlet on the panel, thereby improving the suction efficiency of the top-side dual-suction range hood.

[0039] refer to Figures 1-13 As shown, the range hood proposed in the embodiments of the present invention includes a smoke collection hood 1, a baffle plate 21, a fan 5, and a fan cover 3.

[0040] The smoke hood 1 is used to support and fix the fan cover 3 and the baffle plate 21, as well as other components. Specifically, the smoke hood 1 includes a front panel 11 (front panel 11) and a back panel 12 (rear panel 12) arranged opposite each other. When the range hood is installed, the back panel 12 can be fixed to the wall to fix the overall position of the range hood, while the front panel 11 faces the user. Therefore, the back panel 12 can extend vertically to better fit the wall, thereby improving the stability of the range hood when it is fixed to the wall. The fume hood 1 also includes two side plates 13. The left and right sides of the front panel 11 and the back panel 12 are connected by the back panel 12. The front panel 11, the back panel 12, and the two side plates 13 are used to form the side fume collection chamber 17 of the ventilation fan hood 3. A guide plate 21 is disposed in the side fume collection chamber 17. The guide plate 21 and the lower part of the front panel 11 form a first smoke inlet 19. The guide plate 21 is inclined from bottom to top toward the back panel 12 to guide the oil fumes, change the flow direction of the oil fumes after entering the first smoke inlet 19, and reduce the vortex formed by the direct collision between the oil fumes and the back panel 12. The fan hood 3 is disposed above the fume hood 1. The fan is located inside the fan hood 3 and is used to form a negative pressure suction so that the oil fumes can enter the side fume collection chamber 17 through the first smoke inlet 19. The fan can be a centrifugal fan, an axial fan, etc.

[0041] In one embodiment, the panel 11 is tilted from bottom to top away from the back panel 12, so the cross-sectional area of ​​the side smoke collection chamber 17 gradually increases from bottom to top, the oil fume flow rate decreases, the airflow is relatively more stable, and the generation of eddies is reduced.

[0042] In one embodiment, the range hood is used above two stoves that are spaced apart in the left-right direction. In order to draw in as much cooking fumes as possible, the first smoke inlet 19 is configured as a strip-shaped opening extending in the left-right direction.

[0043] Continue to refer to Figure 1 and Figure 2 As shown, the smoke hood 1 also includes a top plate 14, a lampshade plate 15, and a control panel 16. The top plate 14 and the lampshade plate 15 are arranged opposite each other in the vertical direction. The back plate 12 is connected to the rear end of the top plate 14, and the front panel 11 is connected to the rear end of the lampshade plate 15. Two side plates 13 are respectively arranged on the left and right sides of the top plate 14 and connected to the top plate 14 and the lampshade plate 15. The control panel 16 is arranged at the front end of the top plate 14 and the lampshade plate 15 and connected to the top plate 14 and the lampshade plate 15. The top plate 14, the lampshade plate 15, the side plates 13, and the control panel 16 are used to form a top smoke collection chamber 18 that connects to the side smoke collection chamber 17. The fan cover 3 is arranged on the top plate 14 and communicates with the top smoke collection chamber 18, thereby connecting to the side smoke collection chamber 17. At this time, the smoke hood 1 is set in an approximately "7" shape. Specifically, in order to further improve the smoke extraction efficiency, a second smoke inlet 110 is provided on the lampshade plate 15 for the oil fumes to enter the top smoke collection chamber 18.

[0044] Continue to refer to Figure 2As shown, fumes tend to accumulate and form vortices on the lower part of the panel 11 facing the back panel 12, affecting air intake efficiency. Therefore, the range hood also includes a first guide member 22, which is disposed on the back of the panel 11. The first guide member 22 has a first guide surface 221 that slopes upward from front to back. The bottom edge of the first guide surface 221 is attached to the bottom edge of the panel 11, and the angle α between the first guide surface 221 and the panel 11 is smaller than the angle b between the guide plate 21 and the panel 11.

[0045] The above-mentioned range hood is equipped with a first guide member 22 inside the smoke collection hood 1. After the oil fumes enter the side smoke collection chamber 17 through the first smoke inlet 19, they flow to the back panel 12 under the guiding action of the first guide surface 221, which reduces the impact with the panel 11 near the first smoke inlet 19. The vortex is difficult to form near the panel 11 near the first smoke inlet 19, reducing the possibility of the panel 11 forming a vortex near the first smoke inlet 19.

[0046] It is worth emphasizing that a channel for oil fumes to pass through is formed between the guide plate 21 and the first guide surface 221. The angle α between the first guide surface 221 and the panel 11 is smaller than the angle b between the guide plate 21 and the panel 11. This means that the channel formed by the guide plate 21 and the first guide surface 221 gradually expands away from the first smoke inlet 19, thus reducing the flow velocity of oil fumes and making the airflow relatively more stable. It is not easy to form vortices in the channel. In addition, the wind pressure formed at the first smoke inlet 19 is high, and the suction power is enhanced accordingly, resulting in a better smoke extraction effect.

[0047] Let the angle between the guide plate 21 and the back plate 12 be c, where 45° ≤ c ≤ 60°, for example, c = 45°, c = 47°, c = 50°, c = 55°, or c = 60°. If c is too large, the fumes will easily collide with the guide plate 21, generating eddies; if c is too small, it will not have a good guiding effect, and the fumes will easily collide with the back plate 12. Based on this, let the angle between the surface of the guide plate 21 and the surface of the first guide surface 221 be d, where 7° ≤ d ≤ 15°, for example, d = 7°, d = 8°, d = 9°, d = 10°, d = 11°, d = 12°, d = 13°, d = 14°, or d = 15°. If d is too large, the effect of the first guide surface 221 in guiding the fumes to the back plate 12 will be poor; if d is too small, the smoke extraction effect will be poor.

[0048] To prevent abrupt changes in the shape of the first guide member 22 from causing abrupt changes in the effective ventilation area of ​​the side smoke collection chamber 17, which could lead to vortex formation, the first guide member 22 has a structure that gradually tapers from front to back. That is, the outer perimeter of the first guide member 22, parallel to the panel 11, gradually decreases from front to back. Preferably, the height of the first guide member 22 should be consistent with the height of the panel 11 to reduce the possibility of vortex formation in the area between the upper end of the first guide member 22 and the panel 11, thereby further improving the air intake efficiency.

[0049] It is understandable that the first flow guide 22 can converge at a point, a line, or a surface. When the first flow guide 22 converges at a point, it can adopt a pyramidal side structure, i.e., a pyramidal structure fastened to the panel 11. In this case, the first flow guide surface 221 is triangular, or it can be set as other polygons, such as a pentagon. When the first flow guide 22 converges in a line, its longitudinal cross-section is a V-shape of the same shape and size, or a streamlined shape convex towards the back plate 12. In this case, the first flow guide 22 is... The structure is symmetrical. Taking the longitudinal section of the first guide member 22 as an example, in addition to the first guide surface 221, the first guide member 22 also includes a fourth guide surface 224. Both the first guide surface 221 and the fourth guide surface 224 are set as rectangles. The bottom edge of the first guide surface 221 is attached to the bottom edge of the panel 11, and the top edge of the first guide surface 221 is connected to the bottom edge of the fourth guide surface 224. When the first guide member 22 is folded into one side, the longitudinal section of the first guide member 22 is trapezoidal.

[0050] Because there is only one of the five fans, typically located in the center of a two-burner stove, the fumes from each burner converge towards this center under the fan's influence. This results in a long air intake path, low suction power, and low air intake efficiency. (Reference) Figure 2 and Figure 5 As shown, when the first guide surface 221 is set as a triangle, the first guide member 22 can make the negative pressure on the left and right sides of the first smoke inlet 19 stronger. In other words, the first guide member 22 not only plays a guiding role, but also a diversion role. Under the premise that the power of the fan 5 is constant, the suction force corresponding to the area where the stove is located at the position of the first smoke inlet 19 is stronger, which can better draw the oil fumes into the side smoke collection chamber 17.

[0051] Specifically, the center distance between two burner stoves is generally 450mm, while the diameter of commonly used cookware is between 300mm and 360mm. Based on the premise that the first guide surface 221 is triangular, let the longest length (left-right dimension) of the first guide component 22 be L, which is between (450-360)mm ≤ L ≤ (450-300 / 4*2)mm, i.e., 90mm ≤ L ≤ 300mm. When L is within this range, the negative pressure area formed by the fan 5 can be more accurately aligned with the stove. As for the thickness (front-back dimension) H of the first guide component 22, it is sufficient to ensure that the first guide component 22 does not interfere with the back plate 12.

[0052] In one embodiment, reference continues to be made to Figures 2-7As shown, continuing based on the premise that the first guide surface 221 is set as a triangle, the first guide element 22 also includes a second guide surface 222 and a third guide surface 223. Both the second guide surface 222 and the third guide surface 223 are set as triangles. The bottom edge of the first guide surface 221 is attached to the bottom edge of the panel 11. The two sides of the first guide surface 221 are respectively connected to the second guide surface 222 and the third guide surface 223. Each of the second guide surface 222 and the third guide surface 223 has one side attached to the panel 11. The remaining sides of the second guide surface 222 and the third guide surface 223 coincide to form a ridge line M, that is, the outer surface of the first guide element 22 has a triangular pyramid structure. Optionally, the first guide element 22 is bonded to the panel 11. In this case, the longest length of the first guide element 22 in the left-right direction is the length of the bottom edge of the first guide surface 221. The first guide member 22 can cooperate with the panel 11 to form a closed space in the shape of a triangular pyramid, or the first guide member 22 and the panel 11 can be integrally stamped and formed, and the first guide member 22 can form a groove in the shape of a triangular pyramid.

[0053] When the first guide element 22 converges into a line, based on the consideration of guiding as much oil fume as possible, the length of the first guide element 22 should be as long as possible, for example, referring to... Figures 8-10 As shown, the panel 11 generally has a length of 860mm-880mm, and both sides of the panel 11 are provided with adhesive hooks for fixing the panel 11 to the side plate. The length of the first guide member 22 is between 780mm-800mm. In order for the smoke to flow from below to above the first guide member 22, there should be a gap between the first guide member 22 and the back plate 12. For example, given that the thickness of the side smoke collection chamber 17 in the front-to-back direction is between 80mm-100mm, the thickness of the first guide member 22 is between 20mm-50mm.

[0054] Based on a comprehensive consideration of both guiding and diverting flow, the first guide member 22 can also be set relatively short to allow the flue gas to be diverted from the left and right sides of the first guide member 22. (Reference) Figures 11-13 As shown, the range hood also includes a second guide member 23 and a third guide member 24. The second guide member 23 is located to the left of the first guide member 22 and is attached to the left end face of the first guide member 22. The third guide member 24 is located to the right of the first guide member 22 and is attached to the right end face of the first guide member 22. To achieve the diversion function, the thickness of the second guide member 23 and the thickness of the third guide member 24 are both less than the thickness H of the first guide member 22, or the thickness of the second guide member 23 and the third guide member 24 gradually decreases from the end connected to the first guide member 22 to the other end. It can be understood that when the thickness of the second guide member 23 and the third guide member 24 gradually decreases from the end connected to the first guide member 22 to the other end, in order to reduce the processing difficulty, the first guide member 22, the second guide member 23, and the third guide member 24 can be integrally formed.

[0055] To achieve the flow guiding effect, the second flow guide 23 has a fifth flow guiding surface 231, and the third flow guide 24 has a sixth flow guiding surface 241. The bottom edges of both the fifth flow guiding surface 231 and the sixth flow guiding surface 241 are attached to the bottom edge of the panel 11. For example, when the longitudinal section of the first flow guide 22 is set to a V-shape, the longitudinal sections of the second flow guide 23 and the third flow guide 24 are also set to a V-shape; or, when the longitudinal section of the first flow guide 22 is set to a streamlined shape convex towards the back plate 12, the longitudinal sections of the second flow guide 23 and the third flow guide 24 are also set to a streamlined shape convex towards the back plate 12.

[0056] For example, the second guide member 23 and the third guide member 24 have the same thickness, both being H1. Of course, the thicknesses of the second guide member 23 and the third guide member 24 can also be different to balance the amount of flue gas entering from the left and right sides of the first smoke inlet 19.

[0057] It is worth emphasizing that, considering the diversion effect, the larger the difference between H and H1, the better. However, considering the guiding effect, H1 cannot be too small. When processing the first guide member 22, the second guide member 23, and the third guide member 24, the difference between H and H1 can be set according to actual needs, without specific restrictions. In one embodiment, H1 is between 20mm and 50mm. If H1 is too high, it can easily affect the smoke intake effect of the first smoke inlet 19. If H1 is too low, the guiding effect will be poor. H only needs to ensure that the first guide member 22 does not interfere with the back plate 12.

[0058] Specifically, the total length of the first guide member 22, the second guide member 23 and the third guide member 24 is between 780mm and 800mm, and the length L of the first guide member 22 is in the range of 90mm≤L≤300mm.

[0059] It is understandable that the angles between the fifth guide surface 231 and the sixth guide surface 241 and the panel 11 can be the same as or different from a, but it should be ensured that the angles between the fifth guide surface 231 and the sixth guide surface 241 and the panel 11 are also greater than the angles between the guide plate 21 and the panel 11, so as to reduce the possibility of vortices forming between the guide plate 21 and the fifth guide surface 231 and between the guide plate 21 and the sixth guide surface 241.

[0060] In one embodiment, the outlet of the fan 5 (not shown in the figure) is offset from the central axis N of the panel 11 in the left-right direction. In order to keep the oil fumes passing through the left and right sides of the first guide member 22 balanced, based on the fact that the outer surface of the first guide member 22 is a triangular pyramid structure and the orthographic projection of the bottom edge of the first guide surface 221 toward the panel 11 coincides with the central axis N, the ridge line M of the first guide member 22 is offset from the central axis N of the panel 11 in the direction of the outlet of the fan 5.

[0061] Taking the outlet of fan 5 as an example, which deviates from the right side of the central axis N perpendicular to the left and right direction of panel 11, refer to... Figure 7 As shown, the ridge line M of the first guide member 22 is deflected to the right, that is, the length L1 of the bottom edge of the first guide surface 221 on the left side of the ridge line M is greater than the length L2 of the bottom edge of the first guide surface 221 on the right side of the ridge line M. This allows more airflow to enter from the left side of the first smoke inlet 19, balancing the smoke extraction effect on both sides. For example, considering the size of a typical range hood fan, the distance by which the ridge line M of the first guide member 22 deflects to the right does not exceed 50mm.

[0062] When the range hood includes the second guide member 23 and the third guide member 24, the direction of the outlet of the fan 5 on the symmetrical axis of the first guide member 22 is deviated from the central axis N of the panel 11, so that the lengths of the second guide member 23 and the third guide member 24 are different, thereby realizing the adjustment of the air intake on the left and right sides of the first guide member 22.

[0063] Taking the example that the outlet of the fan 5 is deviated from the right side of the central axis N of the panel 11 in the left-right direction, the symmetrical axis of the first guide 22 is deviated from the central axis N of the panel 11 to the right. At this time, the length of the second guide 23 is greater than the length of the third guide 24, so more smoke can enter from the left side of the first smoke inlet 19, balancing the smoke extraction effect on the left and right sides.

[0064] Based on the premise that the first guide member 22 and the panel 11 form a closed space, the first guide member 22 is provided with a sound-absorbing hole. When oil fumes enter the range hood, they can easily generate noise. In order to reduce noise, the first guide member 22 is provided with a sound-absorbing hole and a sound-absorbing material is provided inside the first guide member 22. The noise in the side smoke collection chamber 17 can enter the first guide member 22 through the sound-absorbing hole and be absorbed by the sound-absorbing material, thereby realizing the function of the sound-absorbing material to absorb the noise in the side smoke collection chamber 17.

[0065] In one embodiment, an array of silencing holes is arranged on the first flow guide 22, and the opening ratio of the silencing holes on the first flow guide 22 is between 15% and 25%, for example, 15%, 20%, and 25%. The opening ratio represents the proportion of the total area of ​​the silencing holes to the total area of ​​the first flow guide 22. When sound-absorbing material is provided in the first flow guide 22, the higher the opening ratio of the first flow guide 22, the greater the absorption of noise in the side smoke collection chamber 17 by the sound-absorbing material. Based on a comprehensive consideration of the structural strength and silencing effect of the first flow guide 22, in the current embodiment, the opening ratio of the silencing holes is 20%.

[0066] Optionally, the shape of the silencing hole can be circular, elliptical, square, pentagonal, etc., without specific limitations, as long as it allows noise to come into contact with the sound-absorbing material through the silencing hole and be absorbed by the sound-absorbing material. It should be emphasized that since the noise generated near the first smoke inlet 19 is mainly high-frequency wind noise, the diameter of the silencing hole should be between 1mm and 2mm.

[0067] refer to Figure 2 As shown, the smoke hood 1 also includes an oil guide plate 4 and an oil cup 6. The oil cup 6 is located at the lower part of the smoke hood 1 and has an upward-facing opening. The oil cup 6 is a long strip extending left and right, used to collect oil stains flowing down from the panel 11. The oil guide plate 4 is located below the first guide member 22. One end of the oil guide plate 4 is connected to the panel 11, and the other end of the oil guide plate 4 is gradually inclined downward from front to back to guide the oil accumulated on the panel, so that the oil can fall accurately into the oil cup 6 from the opening. In addition, in order to prevent the smoke from bypassing the oil guide plate 4 and forming a vortex between the gap first guide surface 221 and the oil guide plate 4, the oil guide plate 4 is provided with a smoke inlet hole 41. The smoke can enter the side smoke collection chamber 17 from the smoke inlet hole 41, thereby reducing the interference of the oil guide plate 4 on the smoke entering the side smoke collection chamber 17. For example, multiple smoke inlets 41 are spaced apart on the oil guide plate 4 in the left and right direction. More specifically, to improve the stability of the oil guide plate 4 connected to the panel 11, a connecting plate is provided on the panel 11. The connecting plate is attached and fixed to the panel 11 and integrally formed with the oil guide plate 4. It can be understood that at this time, the first guide member 22 is attached to the connecting plate.

[0068] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0069] The specific embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A range hood, characterized by include: Smoke hood (1), the smoke hood (1) includes two side plates (13) and a front panel (11) and a back panel (12) arranged opposite to each other, the front panel (11), the back panel (12) and the two side plates (13) are used to form a side smoke collection chamber (17); A guide plate (21) is disposed in the side smoke collection chamber (17) and inclined from bottom to top toward the back plate (12). The guide plate (21) and the lower part of the panel (11) form a first smoke inlet (19). The first guide member (22) is disposed on the back of the panel (11) and located above the first smoke inlet (19). The first guide member (22) has a first guide surface (221) that is inclined upward from front to back. The bottom edge of the first guide surface (221) is attached to the bottom edge of the panel (11), and the angle α between the first guide surface (221) and the panel (11) is smaller than the angle b between the guide plate (21) and the panel (11).

2. The range hood according to claim 1, characterized in that, it is provided with The angle between the plane of the guide plate (21) and the plane of the first guide surface (221) is d, where 7°≤d≤15°.

3. The range hood according to claim 1, characterized in that, The outer surface of the first guide member (22) has a structure that gradually tapers from front to back.

4. The range hood according to claim 3, characterized in that, The first guide member (22) further includes a second guide surface (222) and a third guide surface (223). The outer surface of the first guide member (22) is a triangular pyramid structure. One side of the second guide surface (222) and the third guide surface (223) overlap to form a ridge line M.

5. The range hood according to claim 4, characterized in that, The range hood also includes a fan (5) and a fan cover (3). The fan cover (3) is located on the top of the smoke collection hood (1) and communicates with the side smoke collection chamber (17). The fan (5) is located inside the fan cover (3). The outlet of the fan (5) is offset from the central axis N of the panel (11) perpendicular to the left and right direction. The orthographic projection of the bottom edge of the first guide surface (221) towards the panel (11) coincides with the central axis N. The ridge line M is offset from the central axis N towards the outlet of the fan (5).

6. The range hood according to claim 3, characterized in that, The first guide (22) is gathered in a line. The first guide (22) has a left-right symmetrical structure. The longitudinal section of the first guide (22) is V-shaped or a streamlined shape that convexes towards the back plate (12).

7. The range hood according to claim 6, characterized in that, The range hood includes a second guide (23) and a third guide (24). The second guide (23) and the third guide (24) are respectively attached to the left and right sides of the first guide (22). The second guide (23) has a fifth guide surface (231), and the third guide (24) has a sixth guide surface (241). The bottom edges of the fifth guide surface (231) and the sixth guide surface (241) are attached to the bottom edge of the panel (11). The thickness of the second guide (23) and the thickness of the third guide (24) are both less than the thickness of the first guide (22); or, the thickness of the second guide (23) and the third guide (24) gradually decreases from one end connected to the first guide (22) to the other end.

8. The range hood according to claim 7, characterized in that, The range hood also includes a fan (5) and a fan cover (3). The fan cover (3) is located on the top of the smoke collection hood (1) and communicates with the side smoke collection chamber (17). The fan (5) is located inside the fan cover (3). The outlet of the fan (5) is offset from the central axis N perpendicular to the left and right direction of the panel (11). The symmetrical axis of the first guide member (22) is offset from the central axis N on the side closer to the outlet direction of the fan (5).

9. The range hood according to any one of claims 1-8, characterized in that, The range hood also includes an oil guide plate (4) and an oil cup (6). The oil cup (6) is located at the lower part of the smoke collection hood (1). The oil guide plate (4) is located below the first guide member (22). One end of the oil guide plate (4) is connected to the panel (11), and the other end of the oil guide plate (4) is gradually inclined downward from front to back. The oil guide plate (4) is provided with a smoke inlet hole (41).

10. The range hood according to any one of claims 1-8, characterized in that, The first guide member (22) and the panel (11) together form a closed space; the first guide member (22) is provided with a sound-absorbing hole and the first guide member (22) is provided with a sound-absorbing material.

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