Range hood

Abstract

The present application relates to the technical field of kitchen appliances, and solves or alleviates the problems of poor smoke suction effect and noise. The present application discloses an oil smoke machine, which comprises an air duct cavity, a flow splitting structure and a flow guide plate. The air duct cavity has an upper smoke suction port and a lower smoke suction port. The flow splitting structure is arranged in the air duct cavity and separates the air duct cavity to form a first air duct and a second air duct. The first air duct is in communication with the upper smoke suction port, and the second air duct is in communication with the lower smoke suction port. The vertical length of the upper smoke suction port is L2. The flow guide plate is arranged obliquely downward in the second air duct from the upper edge of the lower smoke suction port. The first side wall of the second air duct in the extension direction of the flow guide plate is arranged obliquely upward. The distance between the end of the flow guide plate away from the upper edge of the lower smoke suction port and the first side wall is L1, wherein 0.3≤L1 / L2≤0.6. The above oil smoke machine can avoid the vortex generated by the mixing of the two air flows to a certain extent, thereby improving the noise and smoke suction effect.

Description

Technical Field

[0001] This invention relates to the field of kitchen appliance technology, and in particular to a range hood. Background Technology

[0002] In related technologies, range hoods are equipped with upper and lower smoke inlets. When the range hood is working, smoke can be drawn in simultaneously through both inlets. However, the two airflows entering the range hood through these two inlets have different velocities, and when mixed, they easily generate eddies, resulting in higher noise levels and poor smoke extraction. Summary of the Invention

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

[0004] An embodiment of the present invention provides a range hood comprising: a duct cavity, a flow-dividing structure, and a flow guide plate. The duct cavity has an upper smoke inlet and a lower smoke inlet. The flow-dividing structure is disposed within the duct cavity and divides the duct cavity to form a first duct and a second duct. The first duct is connected to the upper smoke inlet, and the second duct is connected to the lower smoke inlet.

[0005] The vertical length of the upper smoke inlet is L2. The guide plate is inclined downward at the upper edge of the lower smoke inlet and into the second air duct. The second air duct is inclined upward at the first sidewall in the extension direction of the guide plate. The distance between the end of the guide plate away from the upper edge of the lower smoke inlet and the first sidewall is L1, where 0.3≤L1 / L2≤0.6.

[0006] The aforementioned range hood uses a diversion structure to separate the air duct cavity into a first air duct and a second air duct. When the range hood is working, the airflow drawn into the first air duct from the upper smoke inlet and the airflow drawn into the second air duct from the lower smoke inlet are separated, thereby avoiding the eddies generated after the two airflows mix to a certain extent, which can improve noise and smoke extraction effect.

[0007] In some embodiments, the range hood further includes a fan assembly, which includes a first air inlet and a second air inlet in the axial direction, with the outlet of the first air duct facing the first air inlet and the outlet of the second air duct facing the second air inlet.

[0008] In some embodiments, the flow diversion structure includes a first flow diversion plate located between the second air inlet and the upper smoke outlet.

[0009] In some embodiments, the diversion structure further includes a vertical plate, wherein the first diversion plate extends obliquely towards the first air inlet from its upper end.

[0010] In some embodiments, the included angle β between the first diverter plate and the vertical plate is 110° to 145°.

[0011] In some embodiments, the diversion structure further includes a second diversion plate that extends downward at the lower end of the vertical plate toward the upper smoke inlet.

[0012] In some embodiments, the second diverter is tilted downward at an angle α of 11° to 20°.

[0013] In some embodiments, the range hood further includes a smoke-collecting cavity, which has an upper smoke inlet and a lower smoke inlet. The smoke-collecting cavity includes a back panel and a top smoke baffle, which is spaced apart from the back panel to form a ventilation duct. A vertical plate is located between the top smoke baffle and the back panel. The ventilation duct between the top smoke baffle and the vertical plate is part of the first air duct, and the ventilation duct between the vertical plate and the back panel is part of the second air duct.

[0014] In some embodiments, the distance between the top smoke baffle and the vertical plate is M1, and the length of the first diverter in the horizontal direction is M3, wherein 0.4≤M3 / M1≤0.6.

[0015] In some embodiments, the distance between the top smoke baffle and the vertical plate is M1, where 1.2 ≤ M1 / L2 ≤ 1.5.

[0016] In some embodiments, the distance between the back plate and the vertical plate is M2, where 1.2 ≤ M2 / L1 ≤ 1.5.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein:

[0019] Figure 1 This is a schematic diagram of the structure of a range hood according to an embodiment of the present invention;

[0020] Figure 2 This is an exploded view of a range hood according to an embodiment of the present invention;

[0021] Figure 3 This is a cross-sectional schematic diagram of a range hood according to an embodiment of the present invention;

[0022] Figure 4 yes Figure 3 An enlarged view of part A of the range hood;

[0023] Figure 5 This is a schematic diagram of the diversion structure according to an embodiment of the present invention;

[0024] Figure 6 This is a side view of the flow splitting structure according to an embodiment of the present invention.

[0025] Explanation of key figure labels:

[0026] Range hood 1000, air duct cavity 100, diversion structure 200, fan assembly 300, housing 400, top smoke baffle 500, back panel 600, ventilation duct 700, guide plate 800, oil tray 900, upper smoke inlet 101, lower smoke inlet 102, first air duct 103, second air duct 104, first diversion plate 201, vertical plate 202, second diversion 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, mounting port 4013. Detailed Implementation

[0027] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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 invention.

[0029] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0031] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening 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 possible implementation.

[0033] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote 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 construed as limiting the embodiments of the present invention.

[0034] Please see Figures 1 to 4 An embodiment of the present invention provides a range hood 1000 including a duct cavity 100, a flow-dividing structure 200, and a guide plate 800. The duct cavity 100 has an upper smoke inlet 101 and a lower smoke inlet 102. The flow-dividing structure 200 is disposed within the duct cavity 100 and divides the duct cavity 100 to form a first air duct 103 and a second air duct 104. The first air duct 103 is connected to the upper smoke inlet 101, and the second air duct 104 is connected to the lower smoke inlet 102.

[0035] The vertical length of the upper smoke inlet 101 is L2. The guide plate 800 is inclined downward at the upper edge of the lower smoke inlet 102 and into the second air duct 104. The second air duct 104 is inclined upward at the first side wall 1041 in the extension direction of the guide plate 800. The distance between the end of the guide plate 800 away from the upper edge of the lower smoke inlet 102 and the first side wall 1041 is L1, where 0.3≤L1 / L2≤0.6.

[0036] The aforementioned range hood 1000 uses a diversion structure 200 to separate the air duct cavity 100 to form a first air duct 103 and a second air duct 104. When the range hood 1000 is working, the airflow drawn into the first air duct 103 from the upper smoke inlet 101 and the airflow drawn into the second air duct 104 from the lower smoke inlet 102 are separated, thereby avoiding the vortex generated after the two airflows mix to a certain extent, which can improve noise and smoke extraction effect.

[0037] Specifically, a range hood 1000 is a device used to absorb cooking fumes generated during cooking in a kitchen. The range hood 1000 may include a duct cavity 100 and a diversion structure 200. The duct cavity 100 is the main space for airflow within the range hood 1000. The duct cavity 100 has an upper smoke inlet 101 and a lower smoke inlet 102 for absorbing cooking fumes. The diversion structure 200 is disposed within the duct cavity 100 and divides the duct cavity 100 into a first channel and a second duct 104. Cooking fumes are absorbed through the upper smoke inlet 101 and enter the first duct 103, and absorbed through the lower smoke inlet 102 and enter the second duct 104. This ensures that the two airflows, after entering the duct cavity 100 through the upper smoke inlet 101 and the lower smoke inlet 102 respectively, do not mix, thus preventing problems such as excessive noise and poor smoke extraction.

[0038] 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 inlet 101 and a lower smoke inlet 102 are provided on one side of the smoke-collecting cavity 401. A fan assembly 300 is provided inside the housing 400. The duct cavity 100 may include at least the internal space of the smoke-collecting cavity 401, and may also include the internal space of the housing 400. When the fan assembly 300 is working, it can generate negative pressure in the duct cavity 100. The negative pressure draws in cooking fumes through the upper smoke inlet 101 and the lower smoke inlet 102 simultaneously. The cooking fumes drawn into the range hood 1000 can be discharged outdoors through the flue.

[0039] The range hood 1000 also includes a baffle plate 800, which is located at the upper edge of the lower smoke inlet 102 and is inclined downwards into the second air duct 104. When the range hood 1000 is working, after the oil fumes enter from the lower smoke inlet 102, they come into contact with the baffle plate 800 as they travel along the second air duct 104 into the second air inlet 302. The high-temperature oil fume airflow exchanges heat with the baffle plate 800, and the oil mist particles in the oil fume condense into liquid oil droplets, thereby gradually forming condensed oil on the surface of the baffle plate 800.

[0040] The second air duct 104 includes an upwardly inclined first sidewall 1041 located in the extending direction of the guide plate 800. In one embodiment, the range hood 1000 also includes an oil trough 900, and the downwardly inclined guide plate 800 can guide condensed oil onto the first sidewall 1041 and then into the oil trough 900.

[0041] The distance L1 between the end of the guide plate 800 furthest from the upper edge of the lower smoke inlet 102 and the first sidewall 1041 represents the smoke intake capacity and range of the lower smoke inlet 102. The vertical length L2 of the upper smoke inlet 101 represents the smoke intake capacity and range of the upper smoke inlet 101.

[0042] It should be noted that the upper smoke inlet 101 is mainly used to absorb the fumes rising from above the stove, while the lower smoke inlet 102 mainly absorbs the fumes that diffuse from lower areas near the stove. A ratio of 0.3 ≤ L1 / L2 ≤ 0.6 ensures that the upper smoke inlet 101 can effectively capture the fumes rising from above the stove, and the lower smoke inlet 102 can effectively capture the fumes near the stove, thereby improving the smoke extraction effect of the range hood 1000.

[0043] In some examples, L1 / L2 = 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6 or other values ​​that satisfy 0.3 ≤ L1 / L2 ≤ 0.6.

[0044] 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 collection cavity 401 is provided with an installation opening 4013. The glass panel 4012 can be installed at the installation opening 4013 via the bracket 4011, so that the glass panel 4012 can separate the installation opening 4013 to form an upper smoke inlet 101 and a lower smoke inlet 102. Optionally, the baffle 800 and the bracket 4011 can be an integrally formed structure.

[0045] In some implementations, please refer to 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 disposed toward the first air inlet 301, and the outlet of the second air duct 104 is disposed toward the second air inlet 302.

[0046] In the above embodiment, the outlet of the first air duct 103 is arranged facing the first air inlet 301, and the outlet of the second air duct 104 is arranged facing the second air inlet 302. On the one hand, this 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 smoke extraction efficiency of the fan assembly 300.

[0047] Specifically, the fan assembly 300 is a power device for drawing in airflow and expelling it outdoors. The fan assembly 300 has a first air inlet 301 and a second air inlet 302 facing away from each other in the axial direction.

[0048] The outlet of the first air duct 103 is set towards the first air inlet 301. After the oil fumes are drawn into the upper smoke inlet 101, they enter the first air duct 103, and then are drawn into the fan assembly 300 through the first air inlet 301 and discharged outdoors.

[0049] The outlet of the second air duct 104 is set towards the second air inlet 302. The oil fumes are drawn into the second air duct 104 after being drawn in by the lower smoke inlet 102, and then drawn into the fan assembly 300 through the second air inlet 302 and discharged outdoors.

[0050] It should be noted that, Figure 3 The arrows in the image indicate the direction of the oil fumes' flow.

[0051] In some implementations, please refer to Figures 3 to 5 The diversion structure 200 includes a first diversion plate 201, which is located between the second air inlet 302 and the upper smoke outlet 101.

[0052] In the above embodiments, the first diversion plate 201 can reduce the noise radiation from the second air inlet 302 through the smoke inlet 101 to a certain extent, thereby further reducing the noise of the range hood 1000.

[0053] Specifically, the fan assembly 300 includes a second air inlet 302. When the range hood 1000 is operating, the fan assembly 300 runs to create a negative pressure within the duct cavity 100, allowing cooking fumes generated during cooking to be drawn in through the upper smoke inlet 101 and the lower smoke inlet 102. The drawn-in fumes are then drawn into the fan assembly 300 through the first duct 103 and the second duct 104. Fumes within the second duct 104 are drawn into the fan assembly 300 through the second air inlet 302 for exhaust outdoors. During high-speed operation of the fan assembly 300, the second air inlet 302 generates significant noise, which may radiate outwards through the upper smoke inlet 101.

[0054] The first diversion plate 201 is located between the second air inlet 302 and the upper smoke inlet 101, which can form a structural barrier between the two, thereby suppressing the transmission and radiation of noise at the second air inlet 302 along the direction of the upper smoke inlet 101 to a certain extent, thereby reducing noise leakage and optimizing the overall quiet performance of the machine.

[0055] In some implementations, please refer to Figures 3 to 5 The diversion structure 200 also includes a vertical plate 202, and the first diversion plate 201 extends at an angle from the upper end of the vertical plate 202 toward the first air inlet 301.

[0056] In the above embodiments, on the one hand, the fumes can be guided to the first air inlet 301, and on the other hand, the grease diversion of the fumes can be improved.

[0057] Specifically, the vertical plate 202 is arranged in a vertical direction, and its upper end extends obliquely towards the first air inlet 301 to form a first diverter plate 201.

[0058] After entering through the upper suction inlet 101, the cooking fumes travel along the first air duct 103 to the first air inlet 301. During this process, they come into contact with the first diverter plate 201. On one hand, the high-temperature cooking fume airflow exchanges heat with the first diverter plate 201, causing the oil mist particles in the fumes to condense into liquid oil droplets, thus gradually forming condensed oil on the surface of the first diverter plate 201. On the other hand, the cooking fumes can be accurately guided by the first diverter plate 201 to the first air inlet 301, which facilitates the rapid entry of the cooking fumes into the fan assembly 300 and their discharge outdoors.

[0059] Optionally, the first diversion plate 201 and the vertical plate 202 are integrally formed structures.

[0060] In some implementations, please refer to Figure 6 The included angle β between the first diverter plate 201 and the vertical plate 202 is 110° to 145°.

[0061] In the above embodiment, the fumes drawn in by the upper smoke inlet 101 are guided to the first air inlet 301, thereby avoiding the eddies generated after the two airflows mix to a certain extent, which can improve noise and smoke extraction effect.

[0062] Specifically, the included angle β between the first diverter plate 201 and the vertical plate 202 is 110° to 145°, so that the oil fumes drawn in from the upper smoke inlet 101 can be guided and deflected along the surface of the first diverter plate 201, thereby flowing towards the first air inlet 301 and finally smoothly entering the fan assembly 300.

[0063] In some examples, β = 110°, 115°, 120°, 125°, 130°, 135°, 140°, 145° or other values ​​that satisfy 110°≤β≤145°.

[0064] In some implementations, please refer to Figures 3 to 5 The diversion structure 200 also includes a second diversion plate 203, which extends downward at an angle towards the upward smoke inlet 101 at the lower end of the vertical plate 202.

[0065] In the above embodiments, the second diversion plate 203 can guide the condensed grease on the first diversion plate 201 to achieve directional collection and discharge of condensed oil.

[0066] Specifically, the vertical plate 202 is set in the vertical direction, and its lower end extends downward at an angle towards the upward smoke inlet 101 to form a second diversion plate 203.

[0067] In one embodiment, the range hood 1000 further includes an oil tank 900. After condensed oil gradually forms on the surface of the first diversion plate 201, the condensed oil can gradually flow to the second diversion plate 203 by gravity and then into the oil tank 900, thereby achieving directional collection and discharge of grease.

[0068] Optionally, the second diversion plate 203 and the vertical plate 202 are integrally formed structures.

[0069] Optionally, the first diversion plate 201, the second diversion plate 203, and the vertical plate 202 are integrally formed structures.

[0070] In some implementations, please refer to Figure 6 The second diverter plate 203 is tilted downward at an angle α of 11° to 20°.

[0071] In the above embodiments, gravity can be used to allow the grease condensed on the surface of the first diversion plate 201 to flow smoothly along the second diversion plate 203, thereby achieving efficient guidance and directional discharge of the condensed oil.

[0072] 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.

[0073] In some examples, α = 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20° or other values ​​that satisfy 11°≤α≤20°.

[0074] In some implementations, please refer to Figure 3 and Figure 4 The range hood 1000 also includes a smoke collection chamber 401, which has an upper smoke inlet 101 and a lower smoke inlet 102. The smoke collection chamber 401 includes a back plate 600 and a top smoke baffle 500. The top smoke baffle 500 and the back plate 600 are spaced apart to form a ventilation duct 700. A vertical plate 202 is located between the top smoke baffle 500 and the back plate 600. The ventilation duct 700 between the top smoke baffle 500 and the vertical plate 202 is part of a first air duct 103, and the ventilation duct 700 between the vertical plate 202 and the back plate 600 is part of a second air duct 104.

[0075] In the above embodiments, the smoke collection cavity 401 can effectively collect the oil fumes generated during cooking, thereby improving the smoke exhaust effect of the range hood 1000.

[0076] Specifically, the smoke collection chamber 401 is a shell structure used to collect and guide cooking fumes. At least a portion of the air duct chamber 100 is provided within the smoke collection chamber 401. The smoke collection chamber 401 is provided with an upper smoke inlet 101 and a lower smoke inlet 102. When the range hood 1000 is operating, the fan assembly 300 operates to create a negative pressure within the smoke collection chamber 401, allowing the smoke collection chamber 401 to draw in cooking fumes generated during cooking through the upper smoke inlet 101 and the lower smoke inlet 102.

[0077] The smoke collection chamber 401 includes a back panel 600 and a top smoke baffle 500. The back panel 600 is located at the back of the range hood 1000 and can be used to support the range hood 1000 when mounted on a wall. The top smoke baffle 500 can block upward-moving fumes during cooking, allowing as much fumes as possible to be drawn in by the upper suction inlet 101. The top smoke baffle 500 is spaced from the back panel 600 to form a ventilation duct 700, through which the drawn-in fumes flow to the fan assembly 300 and are then exhausted outdoors.

[0078] The vertical plate 202 is located between the back plate 600 and the top smoke baffle 500. The ventilation duct 700 between the top smoke baffle 500 and the vertical plate 202 is part of the first air duct 103, used to guide the fumes drawn in by the upper smoke inlet 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 fumes drawn in by the lower smoke inlet 102 into the second air inlet 302 of the fan assembly 300.

[0079] In some implementations, please refer to 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 diversion plate 201 in the horizontal direction is M3, where 0.4≤M3 / M1≤0.6.

[0080] In the above embodiment, the fumes are effectively guided to the first air inlet 301 by the first diversion plate 201, while at the same time avoiding the flow area of ​​the first air duct 103 being too small to a certain extent.

[0081] Specifically, the distance between the top smoke baffle 500 and the vertical plate 202 is M1, which represents the width of the first air duct 103 in the ventilation duct 700. The length of the first diverter plate 201 in the horizontal direction is M3, which represents the width of the first diverter plate 201 in the horizontal direction.

[0082] The ratio 0.4≤M3 / M1≤0.6 ensures that the first diverter plate 201 has an appropriate length for guiding the flow, allowing the fumes to be effectively guided to the first air inlet 301. On the other hand, it avoids the problem of excessive extension of the first diverter plate 201 leading to an excessively small flow area in the first air duct 103, which would result in increased wind resistance, increased noise, and reduced suction efficiency.

[0083] In some examples, M3 / M1 = 0.4, 0.45, 0.5, 0.55, 0.6 or other values ​​that satisfy 0.4 ≤ M3 / M1 ≤ 0.6.

[0084] In some implementations, please refer to 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.

[0085] The above implementation method can improve the stability of the oil fume airflow while reducing space waste.

[0086] Specifically, the distance between the top smoke baffle 500 and the vertical plate 202 is M1, which represents the width of the first air duct 103 within the ventilation duct 700. The vertical length of the upper smoke inlet 101 is L2, which represents the smoke intake capacity and range of the upper smoke inlet 101.

[0087] 1.2≤M1 / L2≤1.5. On the one hand, M1 is slightly larger than L2, so that the oil fumes sucked in by the upper smoke inlet 101 can smoothly enter the first air inlet 301 through the first air duct 103, thereby improving the stability of the oil fume airflow. On the other hand, it avoids to some extent the problem of M1 being too large, which would lead to redundancy or wasted space.

[0088] In some examples, M1 / L2 = 1.2, 1.25, 1.3, 1.35, 1.4, 1.45, 1.5 or other values ​​that satisfy 1.2 ≤ M1 / L2 ≤ 1.5.

[0089] In some implementations, please refer to Figure 3 and Figure 4 The distance between the back panel 600 and the vertical panel 202 is M2, where 1.2≤M2 / L1≤1.5.

[0090] The above implementation method can improve the stability of the oil fume airflow while reducing space waste.

[0091] Specifically, the range hood 1000 includes a baffle plate 800, which is disposed at the upper edge of the lower smoke inlet 102 and inclined downwards into the second air duct 104. When the range hood 1000 is working, after the oil fumes enter from the lower smoke inlet 102, they come into contact with the baffle plate 800 as they travel along the second air duct 104 into the second air inlet 302. The high-temperature oil fume airflow exchanges heat with the baffle plate 800, and the oil mist particles in the oil fume condense into liquid oil droplets, thereby gradually forming condensed oil on the surface of the baffle plate 800.

[0092] The second air duct 104 includes an upwardly inclined first sidewall 1041 located in the extending direction of the guide plate 800. In one embodiment, the range hood 1000 also includes an oil trough 900, and the downwardly inclined guide plate 800 can guide condensed oil onto the first sidewall 1041 and then into the oil trough 900.

[0093] The distance L1 between the end of the baffle 800 furthest from the upper edge of the lower smoke inlet 102 and the first sidewall 1041 represents the smoke intake capacity and range of the lower smoke inlet 102. The distance M2 between the back plate 600 and the vertical plate 202 represents the width of the second air duct 104 within the ventilation duct 700.

[0094] 1.2≤M2 / L1≤1.5. On the one hand, M2 is slightly larger than L1, so that the oil fumes sucked in by the lower smoke inlet 102 can smoothly enter the second air inlet 302 through the second air duct 104, thereby improving the stability of the oil fume airflow. On the other hand, it avoids to some extent the problem of M2 being too large, which would lead to redundancy or wasted space.

[0095] In some examples, M2 / L1 = 1.2, 1.25, 1.3, 1.35, 1.4, 1.45, 1.5 or other values ​​that satisfy 1.2 ≤ M2 / L1 ≤ 1.5.

[0096] In an optional embodiment, a safety net 1042 is provided inside the second air duct 104. After the oil fumes enter from the lower smoke inlet 102, they come into contact with the safety net 1042 as they travel along the second air duct 104 to the second air inlet 302. The high-temperature oil fume airflow exchanges heat with the safety net 1042, causing the oil mist particles in the fumes to condense into liquid oil droplets. This gradually forms condensed oil on the surface of the safety net 1042, increasing the oil distribution. The condensed oil on the surface of the safety net 1042 can drip onto the first sidewall 1041, which then guides the condensed oil into the oil tank 900.

[0097] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions 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 one or more embodiments or examples.

[0098] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more steps for implementing a particular logical function or process, and the scope of the preferred embodiments of the invention includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as will be understood by those skilled in the art to which embodiments of the invention pertain.

[0099] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, combinations, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A range hood characterized by, The oil fume exhaust fan comprises a wind channel cavity, a flow splitting structure and a flow guide plate, the wind channel cavity is provided with an upper smoke suction port and a lower smoke suction port, the flow splitting structure is arranged in the wind channel cavity and separates the wind channel cavity to form a first wind channel and a second wind channel, the first wind channel is communicated with the upper smoke suction port, and the second wind channel is communicated with the lower smoke suction port. A vertical length of the upper smoke suction port is L2, the flow guide plate is arranged to be inclined downwardly into the second wind channel at an upper edge of the lower smoke suction port, a first side wall of the second wind channel in an extension direction of the flow guide plate is arranged to be inclined upwardly, and a distance between an end of the flow guide plate away from the upper edge of the lower smoke suction 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 oil fume exhaust fan further comprises a fan assembly, the fan assembly comprises a first air inlet and a second air inlet in an axial direction, an outlet of the first wind channel is arranged towards the first air inlet, and an outlet of the second wind channel is arranged towards the second air inlet.

3. The range hood according to claim 2, wherein The flow splitting structure comprises a first flow splitting plate, and the first flow splitting plate is located between the second air inlet and the upper smoke suction port.

4. The range hood according to claim 3, wherein The flow splitting structure further comprises a vertical plate, and the first flow splitting plate is arranged to be inclined and extended towards the first air inlet at an upper end of the vertical plate.

5. The range hood according to claim 4, wherein An included angle β between the first flow splitting plate and the vertical plate is 110° to 145°.

6. The range hood according to claim 4, wherein The flow splitting structure further comprises a second flow splitting plate, and the second flow splitting plate is arranged to be inclined and extended downwardly towards the upper smoke suction port at a lower end of the vertical plate.

7. The range hood according to claim 6, characterized in that An angle α at which the second flow splitting plate is arranged to be inclined downwardly is 11° to 20°.

8. The range hood according to claim 4, wherein The oil fume exhaust fan further comprises a smoke gathering cavity, the smoke gathering cavity is provided with the upper smoke suction port and the lower smoke suction port, the smoke gathering cavity comprises a back plate and a top smoke blocking plate, the top smoke blocking plate is spaced apart from the back plate to form a ventilation channel, the vertical plate is located between the top smoke blocking plate and the back plate, a ventilation channel between the top smoke blocking plate and the vertical plate is a part of the first wind channel, and a ventilation channel between the vertical plate and the back plate is a part of the second wind channel.

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

6.

10. The range hood according to claim 8, wherein A distance between the top smoke blocking plate and the vertical plate is M1, wherein 1.2≤M1 / L2≤1.

5.

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

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