Range hood

Abstract

The invention relates to the technical field of kitchen appliances, and solves or relieves the problems of poor smoking effect and noise. The range hood comprises an air duct cavity, a flow dividing structure and a flow guide plate, the air duct cavity is provided with an upper smoke suction port and a lower smoke suction port, the flow dividing structure is arranged in the air duct cavity and divides the air duct cavity to form a first air duct and a second air duct, the first air duct is communicated with the upper smoke suction port, and the second air duct is communicated with the lower smoke suction port; the vertical length of the upper smoke suction port is L2, the flow guide plate is obliquely arranged downwards from the upper edge of the lower smoke suction port to the interior of the second air duct, the second air duct is obliquely arranged upwards on the first side wall in the extending direction of the flow guide plate, the distance between the end, away from the upper edge of the lower smoke suction port, of the flow guide plate and the first side wall is L1, and L1 / L2 is larger than or equal to 0.3 and smaller than or equal to 0.6. According to the range hood, vortexes generated after the two air flows are mixed are avoided to a certain extent, so that the noise can be reduced, and the smoke suction effect can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and in particular to a range hood. Background Art

[0002] In the prior art, range hoods are equipped with an upper and lower inlet. When the range hood is in operation, smoke can be drawn through both inlets simultaneously. However, due to the inconsistent flow rates of the two airflows entering the range hood through the two inlets, mixing them can easily lead to vortexes, resulting in loud noise and poor extraction quality. Summary of the Invention

[0003] The embodiments of the present invention provide a range hood to solve at least one of the above-mentioned technical problems.

[0004] A range hood provided in an embodiment of the present invention includes: an air duct cavity, a diverter structure, and a guide plate, wherein the air duct cavity has an upper smoke outlet and a lower smoke outlet, the diverter structure is disposed in the air duct cavity and divides the air duct cavity to form a first air duct and a second air duct, wherein the first air duct is connected to the upper smoke outlet, and the second air duct is connected to the lower smoke outlet; The vertical length of the upper smoking port is L2, the guide plate is arranged at an angle downward toward the second air duct at the upper edge of the lower smoking port, the first side wall of the second air duct in the extension direction of the guide plate is arranged at an angle upward, and the distance between the end of the guide plate away from the upper edge of the lower smoking port and the first side wall is L1, wherein 0.3≤L1 / L2≤0.6.

[0005] The above-mentioned range hood divides the air duct cavity into the first air duct and the second air duct by a diversion structure. When the range hood is working, the airflow inhaled into the first air duct from the upper smoke outlet and the airflow inhaled into the second air duct from the lower smoke outlet are separated, thereby avoiding the vortex generated by the mixing of the two airflows to a certain extent, thereby improving the noise and smoking effect.

[0006] In some embodiments, the range hood further includes a fan assembly, which includes a first air inlet and a second air inlet in an axial direction, the outlet of the first air duct is arranged toward the first air inlet, and the outlet of the second air duct is arranged toward the second air inlet.

[0007] In some embodiments, the diversion structure includes a first diversion plate, and the first diversion plate is located between the second air inlet and the upper smoking port.

[0008] In some embodiments, the diverter structure further includes a vertical plate, and the first diverter plate extends obliquely from the upper end of the vertical plate toward the first air inlet.

[0009] In certain embodiments, an angle β between the first diverter plate and the vertical plate is in a range of 110° to 145°.

[0010] In some embodiments, the diversion structure further includes a second diversion plate, which extends obliquely downward toward the upper smoking port at the lower end of the vertical plate.

[0011] In certain embodiments, the second diverter plate is tilted downward at an angle α of 11° to 20°.

[0012] In some embodiments, the range hood further includes a smoke collection cavity, the smoke collection cavity is provided with the upper smoke outlet and the lower smoke outlet, the smoke collection cavity includes a back panel and a top smoke baffle, the top smoke baffle is spaced from the back panel to form a ventilation duct, the vertical panel is located between the top smoke baffle and the back panel, the ventilation duct between the top smoke baffle and the vertical panel is part of the first air duct, and the ventilation duct between the vertical panel and the back panel is part of the second air duct.

[0013] In certain embodiments, the distance between the top smoke baffle and the vertical plate is M1, and the length of the first diverter plate in the horizontal direction is M3, wherein 0.4≤M3 / M1≤0.6.

[0014] In some embodiments, the distance between the top smoke shield and the vertical plate is M1, wherein 1.2≤M1 / L2≤1.5.

[0015] In some embodiments, the distance between the back plate and the vertical plate is M2, wherein 1.2≤M2 / L1≤1.5.

[0016] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments with reference to the following drawings, in which: Figure 1 1 is a schematic structural diagram of a range hood according to an embodiment of the present invention; Figure 2 is an exploded schematic diagram of a range hood according to an embodiment of the present invention; Figure 3 is a schematic cross-sectional view of a range hood according to an embodiment of the present invention; Figure 4 yes Figure 3 An enlarged view of part A of the range hood; Figure 51 is a schematic structural diagram of a diversion structure according to an embodiment of the present invention; Figure 6 4 is a side view of a flow dividing structure according to an embodiment of the present invention.

[0018] Description of main reference numerals: Range hood 1000, air duct cavity 100, diversion structure 200, fan assembly 300, box body 400, top smoke baffle 500, back plate 600, ventilation duct 700, guide plate 800, oil tank 900, upper smoke outlet 101, lower smoke outlet 102, first air duct 103, second air duct 104, first diverter plate 201, vertical plate 202, second diverter plate 203, first air inlet 301, second air inlet 302, smoke collection cavity 401, first side wall 1041, safety net 1042, bracket 4011, glass panel 4012, installation port 4013. DETAILED DESCRIPTION

[0019] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0021] Furthermore, 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0022] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0023] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0024] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0025] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of the present invention, and should not be understood as limiting the embodiments of the present invention.

[0026] See also Figures 1 to 4 In one embodiment of the present invention, a range hood 1000 includes an air duct chamber 100, a diverter structure 200, and a deflector 800. The air duct chamber 100 has an upper smoke outlet 101 and a lower smoke outlet 102. The diverter structure 200 is disposed within the air duct chamber 100 and divides the air duct chamber 100 into a first air duct 103 and a second air duct 104. The first air duct 103 communicates with the upper smoke outlet 101, and the second air duct 104 communicates with the lower smoke outlet 102.

[0027] The vertical length of the upper smoking port 101 is L2, the guide plate 800 is arranged at an upper edge of the lower smoking port 102 and is tilted downward toward the second air duct 104, the first side wall 1041 of the second air duct 104 in the extension direction of the guide plate 800 is arranged at an upward tilt, and the distance between the end of the guide plate 800 away from the upper edge of the lower smoking port 102 and the first side wall 1041 is L1, wherein 0.3≤L1 / L2≤0.6.

[0028] The above-mentioned range hood 1000 divides the air duct cavity 100 into a first air duct 103 and a second air duct 104 by a diversion structure 200. When the range hood 1000 is working, the airflow sucked into the first air duct 103 from the upper smoke outlet 101 and the airflow sucked into the second air duct 104 from the lower smoke outlet 102 are separated, thereby avoiding to a certain extent the vortex generated by the mixing of the two airflows, thereby improving the noise and smoking effect.

[0029] Specifically, the range hood 1000 is a device for absorbing oil smoke generated during cooking in the kitchen. The range hood 1000 may include an air duct cavity 100 and a diversion structure 200. The air duct cavity 100 is the main space for air to flow inside the range hood 1000. The air duct cavity 100 has an upper smoke outlet 101 and a lower smoke outlet 102 for absorbing oil smoke. The diversion structure 200 is arranged in the air duct cavity 100 and divides the air duct cavity 100 into a first channel and a second air duct 104. After being absorbed from the upper smoke outlet 101, the oil smoke enters the first air duct 103, and after being absorbed from the lower smoke outlet 102, it enters the second air duct 104, so that after the two air flows enter the air duct cavity 100 through the upper smoke outlet 101 and the lower smoke outlet 102 respectively, they will not mix and cause problems such as loud noise and poor smoking effect.

[0030] exist Figures 1 to 3 In the illustrated embodiment, the range hood 1000 further includes a housing 400 and a smoke-collecting cavity 401. The smoke-collecting cavity 401 is located at the bottom of the housing 400, and an upper smoke outlet 101 and a lower smoke outlet 102 are provided on one side of the smoke-collecting cavity 401. A fan assembly 300 is disposed within the housing 400. The air duct cavity 100 may include at least the interior space of the smoke-collecting cavity 401, and the air duct cavity 100 may also include the interior space of the housing 400. When the fan assembly 300 is in operation, it can generate negative pressure within the air duct cavity 100. This negative pressure simultaneously draws in oil smoke through the upper smoke outlet 101 and the lower smoke outlet 102. Oil smoke drawn into the range hood 1000 can be discharged outdoors through a smoke duct.

[0031] The range hood 1000 also includes a deflector 800, which is disposed at the upper edge of the lower smoke outlet 102 and angled downward toward the second air duct 104. During operation, oil smoke enters the lower smoke outlet 102 and travels along the second air duct 104 to the second air inlet 302. There, it comes into contact with the deflector 800, exchanging heat with the high-temperature oil smoke flow. Oil mist particles in the oil smoke condense into liquid oil droplets, gradually forming condensed oil on the surface of the deflector 800.

[0032] The second air duct 104 includes a first sidewall 1041 that is tilted upward and located in the direction of the guide plate 800. In one embodiment, the range hood 1000 further includes an oil tank 900. The downward-tilted guide plate 800 can guide condensed oil onto the first sidewall 1041 and then into the oil tank 900.

[0033] The distance between the end of the deflector 800 away from the upper edge of the lower smoke outlet 102 and the first side wall 1041 is L1, which represents the smoke intake capacity and range of the lower smoke outlet 102. The vertical length of the upper smoke outlet 101 is L2, which represents the smoke intake capacity and range of the upper smoke outlet 101.

[0034] It should be noted that the upper smoke outlet 101 primarily absorbs cooking fumes rising from above the stove, while the lower smoke outlet 102 primarily absorbs cooking fumes diffused from low areas near the stove. The ratio 0.3 ≤ L1 / L2 ≤ 0.6 ensures that the upper smoke outlet 101 can effectively capture cooking fumes rising from above the stove, while the lower smoke outlet 102 can effectively capture cooking fumes near the stove, thereby improving the extraction efficiency of the range hood 1000.

[0035] In some examples, L1 / L2=0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, or other values ​​satisfying 0.3≤L1 / L2≤0.6.

[0036] exist Figures 1 to 3 In the illustrated embodiment, the range hood 1000 further includes a glass panel 4012 and a bracket 4011. The smoke collecting chamber 401 is provided with a mounting opening 4013. The glass panel 4012 can be mounted at the mounting opening 4013 via the bracket 4011, so that the glass panel 4012 can separate the mounting opening 4013 to form the upper smoke outlet 101 and the lower smoke outlet 102. Optionally, the deflector 800 and the bracket 4011 can be integrally formed.

[0037] In some embodiments, please combine Figure 3The range hood 1000 also includes a fan assembly 300, which includes a first air inlet 301 and a second air inlet 302 in the axial direction. The outlet of the first air duct 103 is arranged toward the first air inlet 301, and the outlet of the second air duct 104 is arranged toward the second air inlet 302.

[0038] In the above embodiment, the outlet of the first air duct 103 is arranged toward the first air inlet 301, and the outlet of the second air duct 104 is arranged toward the second air inlet 302. On the one hand, it can reduce the interference between the first air duct 103 and the second air duct 104 to a certain extent, and on the other hand, it can improve the smoking efficiency of the fan assembly 300.

[0039] Specifically, the fan assembly 300 is a power device for sucking air and exhausting it outdoors. The fan assembly 300 is provided with a first air inlet 301 and a second air inlet 302 opposite to each other in the axial direction.

[0040] The outlet of the first air duct 103 is arranged toward the first air inlet 301 . The oil smoke is sucked into the first air duct 103 by the upper smoke outlet 101 , and then is sucked into the fan assembly 300 through the first air inlet 301 and discharged outdoors.

[0041] The outlet of the second air duct 104 is arranged toward the second air inlet 302 . The oil smoke is sucked into the second air duct 104 by the lower smoke outlet 102 , and then is sucked into the fan assembly 300 through the second air inlet 302 and discharged outdoors.

[0042] It should be noted that Figure 3 The arrows in the figure indicate the flow direction of oil smoke.

[0043] In some embodiments, please combine Figures 3 to 5 The diversion structure 200 includes a first diversion plate 201 , and the first diversion plate 201 is located between the second air inlet 302 and the upper smoking port 101 .

[0044] In the above embodiment, the first diverter plate 201 can reduce the noise radiation of the second air inlet 302 passing through the upper smoke outlet 101 to a certain extent, thereby further reducing the noise of the range hood 1000.

[0045] Specifically, the fan assembly 300 includes a second air inlet 302. When the range hood 1000 is in operation, the fan assembly 300 creates a negative pressure within the air duct chamber 100, drawing in cooking fumes through the upper and lower air ducts 101, 102. The drawn-in fumes are then drawn into the fan assembly 300 through the first and second air ducts 103, 104. Fumes in the second air duct 104 are drawn into the fan assembly 300 through the second air inlet 302 and then exhausted outdoors. When the fan assembly 300 operates at high speed, the second air inlet 302 generates considerable noise, which may radiate outward through the upper air duct 101.

[0046] The first diverter plate 201 is located between the second air inlet 302 and the upper smoking port 101, and can form a structural barrier between the two, thereby suppressing the noise at the second air inlet 302 from being transmitted and radiated along the upper smoking port 101 to a certain extent, thereby reducing noise leakage and optimizing the quiet performance of the entire machine.

[0047] In some embodiments, please combine Figures 3 to 5 The diversion structure 200 further includes a vertical plate 202 , and the first diversion plate 201 extends obliquely toward the first air inlet 301 at the upper end of the vertical plate 202 .

[0048] In the above embodiment, on the one hand, the oil smoke can be guided to the first air inlet 301 , and on the other hand, the oil diversion degree of the oil smoke can be improved.

[0049] Specifically, the vertical plate 202 is arranged along the vertical direction, and the upper end thereof is inclined and extended toward the first air inlet 301 to form the first diverter plate 201 .

[0050] After entering the upper smoke outlet 101, the oil smoke travels along the first air duct 103 into the first air inlet 301, where it contacts the first diverter plate 201. On the one hand, the high-temperature oil smoke flow exchanges heat with the first diverter plate 201, condensing the oil mist particles in the oil smoke into liquid oil droplets, thereby gradually forming condensed oil on the surface of the first diverter plate 201. On the other hand, the oil smoke is accurately guided by the first diverter plate 201 to the first air inlet 301, facilitating the rapid entry of the oil smoke into the fan assembly 300 and its discharge outdoors.

[0051] Optionally, the first diverter plate 201 and the vertical plate 202 are an integrally formed structure.

[0052] In some embodiments, please combine Figure 6 , the included angle β between the first diverter plate 201 and the vertical plate 202 is 110° to 145°.

[0053] In the above embodiment, the oil smoke inhaled by the upper smoking port 101 is guided to the first air inlet 301, thereby avoiding the vortex generated by the mixing of the two air flows to a certain extent, thereby improving the noise and smoking effect.

[0054] Specifically, the angle β between the first diverter plate 201 and the vertical plate 202 is 110° to 145°, so that the oil smoke inhaled from the upper smoke outlet 101 can be guided and deflected along the surface of the first diverter plate 201, thereby flowing toward the first air inlet 301 and finally smoothly entering the fan assembly 300.

[0055] In some examples, β=110°, 115°, 120°, 125°, 130°, 135°, 140°, 145°, or other values ​​satisfying 110°≤β≤145°.

[0056] In some embodiments, please combine Figures 3 to 5 The diversion structure 200 further includes a second diversion plate 203 , which extends obliquely downward toward the smoking port 101 at the lower end of the vertical plate 202 .

[0057] In the above embodiment, the second diverter plate 203 can guide the condensed oil on the first diverter plate 201 to achieve directional collection and discharge of the condensed oil.

[0058] Specifically, the vertical plate 202 is arranged in the vertical direction, and the lower end thereof extends downwardly and obliquely toward the upper smoking port 101 to form a second diverter plate 203 .

[0059] In one embodiment, the range hood 1000 further includes an oil tank 900. After condensed oil gradually forms on the surface of the first diverter plate 201, the condensed oil can gradually flow to the second diverter plate 203 under gravity and then flow into the oil tank 900, thereby achieving directional collection and discharge of grease.

[0060] Optionally, the second diverter plate 203 and the vertical plate 202 are an integrally formed structure.

[0061] Optionally, the first diverter plate 201 , the second diverter plate 203 and the vertical plate 202 are an integrally formed structure.

[0062] In some embodiments, please combine Figure 6 The second diverter plate 203 is tilted downward at an angle α of 11° to 20°.

[0063] In the above embodiment, gravity can be used to make the grease condensed on the surface of the first diverter plate 201 flow smoothly along the second diverter plate 203, thereby achieving efficient guidance and directional discharge of the condensed oil.

[0064] Specifically, the second diverter plate 203 is tilted downward at an angle α of 11° to 20°, so that the condensed oil can be smoothly guided into the oil tank 900 .

[0065] In some examples, α=11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, or other values ​​satisfying 11°≤α≤20°.

[0066] In some embodiments, please combine Figure 3 and Figure 4 The range hood 1000 also includes a smoke collecting chamber 401, which is provided with an upper smoke outlet 101 and a lower smoke outlet 102. The smoke collecting chamber 401 includes a back panel 600 and a top smoke baffle 500. The top smoke baffle 500 is spaced from the back panel 600 to form a ventilation duct 700. The vertical panel 202 is located between the top smoke baffle 500 and the back panel 600. The ventilation duct 700 between the top smoke baffle 500 and the vertical panel 202 is part of the first air duct 103, and the ventilation duct 700 between the vertical panel 202 and the back panel 600 is part of the second air duct 104.

[0067] In the above embodiment, the smoke collecting cavity 401 can effectively collect the oil smoke generated during the cooking process, thereby improving the smoke exhaust effect of the range hood 1000.

[0068] Specifically, the smoke-collecting chamber 401 is a shell structure used to collect and guide cooking fumes. At least a portion of the air duct cavity 100 is located within the smoke-collecting chamber 401. The smoke-collecting chamber 401 is provided with an upper smoke inlet 101 and a lower smoke inlet 102. When the range hood 1000 is in operation, the fan assembly 300 operates to create a negative pressure within the smoke-collecting chamber 401, allowing the smoke-collecting chamber 401 to draw in cooking fumes through the upper and lower smoke inlets 101, 102.

[0069] The smoke trapping chamber 401 includes a back panel 600 and a top smoke baffle 500. The back panel 600 is located on the back of the range hood 1000 and can be used to support the range hood 1000 for wall mounting. The top smoke baffle 500 blocks upward-moving cooking fumes, allowing as much of the fumes as possible to be drawn into the upper smoke inlet 101. The top smoke baffle 500 is separated from the back panel 600 to form a ventilation duct 700, through which the drawn-in fumes flow toward the fan assembly 300 and are then exhausted outdoors.

[0070] The vertical plate 202 is located between the back plate 600 and the top smoke deflector 500. The ventilation duct 700 between the top smoke deflector 500 and the vertical plate 202 is part of the first air duct 103, used to guide the oil smoke sucked in by the upper smoke outlet 101 into the first air inlet 301 of the fan assembly 300. The ventilation duct 700 between the vertical plate 202 and the back plate 600 is part of the second air duct 104, used to guide the oil smoke sucked in by the lower smoke outlet 102 into the second air inlet 302 of the fan assembly 300.

[0071] In some embodiments, please combine Figure 3 、 Figure 4 and Figure 6 The distance between the top smoke baffle 500 and the vertical plate 202 is M1, and the length of the first diverter plate 201 in the horizontal direction is M3, wherein 0.4≤M3 / M1≤0.6.

[0072] In the above embodiment, the oil smoke is effectively guided to the first air inlet 301 by the first diverter plate 201 , while at the same time, the flow area of ​​the first air duct 103 is prevented from being too small to a certain extent.

[0073] Specifically, the distance between the top smoke shield 500 and the vertical plate 202 is M1, which represents the width of the first air duct 103 in the ventilation duct 700. The horizontal length of the first diverter plate 201 is M3, which represents the horizontal width of the first diverter plate 201.

[0074] 0.4≤M3 / M1≤0.6. On the one hand, it enables the first diverter plate 201 to have an appropriate guide extension length, so that the oil smoke can be effectively guided to the first air inlet 301 by the first diverter plate 201. On the other hand, it avoids to a certain extent the problem of excessive extension of the first diverter plate 201 causing the flow area of ​​the first air duct 103 to be too small, thereby increasing wind resistance, increasing noise and reducing suction efficiency.

[0075] In some examples, M3 / M1=0.4, 0.45, 0.5, 0.55, 0.6, or other values ​​satisfying 0.4≤M3 / M1≤0.6.

[0076] In some embodiments, please combine Figure 3 and Figure 4 The distance between the top smoke baffle 500 and the vertical plate 202 is M1, where 1.2≤M1 / L2≤1.5.

[0077] In the above embodiment, the stability of the oil smoke airflow can be improved while reducing space waste.

[0078] Specifically, the distance between the top smoke shield 500 and the vertical plate 202 is M1, which represents the width of the first air duct 103 in the ventilation duct 700. The vertical length of the upper smoking port 101 is L2, which represents the smoke intake capacity and range of the upper smoking port 101.

[0079] 1.2≤M1 / L2≤1.5. On the one hand, M1 is slightly larger than L2, so that the oil smoke inhaled by the upper smoking port 101 can smoothly pass through the first air duct 103 and enter the first air inlet 301, thereby improving the stability of the oil smoke airflow. On the other hand, it avoids the problem of redundancy or space waste caused by M1 being too large to a certain extent.

[0080] In some examples, M1 / L2=1.2, 1.25, 1.3, 1.35, 1.4, 1.45, 1.5, or other values ​​satisfying 1.2≤M1 / L2≤1.5.

[0081] In some embodiments, please combine Figure 3 and Figure 4 , the distance between the back plate 600 and the vertical plate 202 is M2, where 1.2≤M2 / L1≤1.5.

[0082] In the above embodiment, the stability of the oil smoke airflow can be improved while reducing space waste.

[0083] Specifically, the range hood 1000 includes a deflector 800, which is disposed at the upper edge of the lower smoke outlet 102 and tilted downward toward the second air duct 104. During operation, oil smoke enters the lower smoke outlet 102 and travels along the second air duct 104 to the second air inlet 302. There, it comes into contact with the deflector 800, exchanging heat with the high-temperature oil smoke flow. Oil mist particles in the oil smoke condense into liquid oil droplets, gradually forming condensed oil on the surface of the deflector 800.

[0084] The second air duct 104 includes a first sidewall 1041 that is tilted upward and located in the direction of the guide plate 800. In one embodiment, the range hood 1000 further includes an oil trough 900. The downwardly tilted guide plate 800 can guide condensed oil onto the first sidewall 1041 and then into the oil trough 900.

[0085] The distance between the end of the deflector 800 away from the upper edge of the lower smoke outlet 102 and the first sidewall 1041 is L1, which represents the smoke intake capacity and range of the lower smoke outlet 102. The distance between the back panel 600 and the vertical panel 202 is M2, which represents the width of the second air duct 104 in the ventilation duct 700.

[0086] 1.2≤M2 / L1≤1.5. On the one hand, M2 is slightly larger than L1, so that the oil smoke inhaled by the lower smoke outlet 102 can smoothly pass through the second air duct 104 and enter the second air inlet 302, thereby improving the stability of the oil smoke airflow. On the other hand, it avoids the problem of redundancy or space waste caused by M2 being too large to a certain extent.

[0087] In some examples, M2 / L1=1.2, 1.25, 1.3, 1.35, 1.4, 1.45, 1.5, or other values ​​satisfying 1.2≤M2 / L1≤1.5.

[0088] In an optional embodiment, a safety net 1042 is provided within the second air duct 104. After entering the lower smoke outlet 102, the oil smoke enters the second air inlet 302 along the second air duct 104, where it comes into contact with the safety net 1042. The high-temperature oil smoke flow exchanges heat with the safety net 1042, condensing the oil mist particles in the oil smoke into liquid oil droplets. This gradually forms condensed oil on the surface of the safety net 1042, thereby improving the oil diversion efficiency. The condensed oil on the surface of the safety net 1042 can drip onto the first sidewall 1041, which then directs the condensed oil into the oil tank 900.

[0089] Throughout this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" indicate that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0090] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable actions for implementing a specific logical function or process step, and the scope of the preferred embodiments of the present invention includes additional implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention belong.

[0091] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, combine, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A range hood, characterized in that: The air duct comprises an air duct cavity, a diversion structure and a guide plate, wherein the air duct cavity has an upper smoking port and a lower smoking port, the diversion structure is arranged in the air duct cavity and divides the air duct cavity to form a first air duct and a second air duct, wherein the first air duct is connected to the upper smoking port, and the second air duct is connected to the lower smoking port; The vertical length of the upper smoking port is L2, the guide plate is arranged at an angle downward toward the second air duct at the upper edge of the lower smoking port, the first side wall of the second air duct in the extension direction of the guide plate is arranged at an angle upward, and the distance between the end of the guide plate away from the upper edge of the lower smoking port and the first side wall is L1, wherein 0.3≤L1 / L2≤0.

6.

2. The range hood according to claim 1, characterized in that: The range hood further includes a fan assembly, which includes a first air inlet and a second air inlet in an axial direction, wherein the outlet of the first air duct is arranged toward the first air inlet, and the outlet of the second air duct is arranged toward the second air inlet.

3. The range hood according to claim 2, characterized in that: The diversion structure includes a first diversion plate, and the first diversion plate is located between the second air inlet and the upper smoking port.

4. The range hood according to claim 3, characterized in that: The diversion structure further includes a vertical plate, and the first diversion plate extends obliquely from the upper end of the vertical plate toward the first air inlet.

5. The range hood according to claim 4, characterized in that: An included angle β between the first diverter plate and the vertical plate is 110° to 145°.

6. The range hood according to claim 4, characterized in that: The diversion structure further includes a second diversion plate, which is inclined and extends downward toward the upper smoking port at the lower end of the vertical plate.

7. The range hood according to claim 6, characterized in that: The second diverter plate is tilted downward at an angle α of 11° to 20°.

8. The range hood according to claim 4, characterized in that: The range hood also includes a smoke collection cavity, which is provided with the upper smoke outlet and the lower smoke outlet. The smoke collection cavity includes a back panel and a top smoke baffle. The top smoke baffle is spaced from the back panel to form a ventilation duct. The vertical panel is located between the top smoke baffle and the back panel. The ventilation duct between the top smoke baffle and the vertical panel is part of the first air duct, and the ventilation duct between the vertical panel and the back panel is part of the second air duct.

9. The range hood according to claim 8, characterized in that: The distance between the top smoke baffle and the vertical plate is M1, and the length of the first diverter plate in the horizontal direction is M3, wherein 0.4≤M3 / M1≤0.

6.

10. The range hood according to claim 8, characterized in that: The distance between the top smoke baffle and the vertical plate is M1, wherein 1.2≤M1 / L2≤1.

5.

11. The range hood according to claim 8, characterized in that: The distance between the back plate and the vertical plate is M2, wherein 1.2≤M2 / L1≤1.5.

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