Smoke blocking assembly, design method thereof and range hood

Abstract

The invention belongs to the technical field of household appliances, and discloses a smoke blocking assembly, a design method thereof and a range hood, and the smoke blocking assembly comprises a smoke blocking plate and a flow guide plate. The multiple flow guide plates are arranged on one side of the smoke barrier and are arranged at intervals in the length direction of the smoke barrier, and a flow guide space for oil smoke to circulate is formed between every two adjacent flow guide plates. According to the smoke blocking assembly, the design method of the smoke blocking assembly and the range hood, the high oil smoke suction efficiency can be achieved, and noise generated during operation of the range hood can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a smoke shielding component and a design method thereof, and a range hood. Background Art

[0002] Traditional range hoods are gradually unable to meet market demand due to their large size and large space occupation. Ultra-thin range hoods achieve the same or even better fume extraction effect as traditional range hoods in a smaller volume through advanced aerodynamic design and efficient motor technology, saving space while maintaining a beautiful appearance. The exhaust principle of the range hood is to use the principle of aerodynamics, use the motor to drive the impeller to rotate, exhaust the air inside the volute, form negative pressure, and use atmospheric pressure to suck the air in the kitchen space from the air inlet with the fume, and then exhaust the fume outside through the air duct and exhaust pipe.

[0003] In the prior art, a range hood includes a main box, a smoke collecting chamber and a smoke baffle, wherein the smoke collecting chamber is connected to the main box, and the smoke collecting chamber is provided with a smoke inlet connected to the main box, and the smoke baffle is connected to the smoke collecting chamber, and a smoke baffle channel is formed between the smoke collecting chamber and the smoke collecting chamber. When the main box is working, negative pressure is formed in the smoke baffle channel, and the air in the kitchen space is sucked into the smoke baffle channel with the smoke by atmospheric pressure for exhaust.

[0004] However, when the oil smoke in various directions flows in the smoke barrier channel, it will collide and generate more eddies. The existence of eddies will affect the exhaust efficiency of the range hood, and the range hood will make a lot of noise during operation. Summary of the invention

[0005] The object of the present invention is to provide a smoke shielding component and a design method thereof, and a range hood, so as to solve the technical problems of low smoke extraction efficiency and high noise existing in the prior art.

[0006] As conceived above, the technical solution adopted by the present invention is:

[0007] A smoke barrier assembly is provided, comprising:

[0008] Smoke shield;

[0009] A plurality of guide plates are provided, and the guide plates are all arranged on one side of the smoke baffle plate, and the guide plates are arranged at intervals along the length direction of the smoke baffle plate, and a guide space for the oil smoke to flow is formed between two adjacent guide plates.

[0010] Preferably, the smoke baffle has a first vertex angle and a second vertex angle, and a portion of the plurality of guide plates are bent toward the first vertex angle, and another portion of the guide plates are bent toward the second vertex angle.

[0011] Preferably, the multiple guide plates facing the first vertex angle and the multiple guide plates facing the second vertex angle are symmetrically arranged with the center line in the length direction of the smoke baffle plate as the axis of symmetry.

[0012] Preferably, the guide plate comprises a first plate portion and a second plate portion connected;

[0013] The first plate portion has a first arc-shaped guide surface, the second plate portion has a second arc-shaped guide surface adjacent to the first guide surface, a tangent line passing through an end point of the first guide surface close to one end of the second guide surface and tangent to the first guide surface is a first tangent line, a tangent line passing through an end point of the second guide surface close to one end of the first guide surface and tangent to the second guide surface is a second tangent line, and the first tangent line and the second tangent line are collinear.

[0014] Preferably, the smoke shield assembly also includes an oil guide structure, which is arranged on the guide plate, one end of the oil guide structure extends to the smoke shield, and the other end of the oil guide structure extends to the edge of the guide plate, and the oil guide structure is used to guide the oil on the surface of the smoke shield and the guide plate to drip into the oil cup.

[0015] Preferably, the angle between the oil guide structure and the smoke baffle is α, 10°≤α≤30°.

[0016] A smoke barrier assembly design method is provided, which is used to design the above-mentioned smoke barrier assembly. The smoke barrier assembly design method includes a guide plate design step, and the guide plate design step includes:

[0017] Determining a first intersection position of the second end of the guide plate and the outflow edge of the smoke baffle;

[0018] Determine a second intersection position of the first end of the guide plate or an extension line of the first end and the side edge of the smoke baffle;

[0019] The shape of the guide plate is determined, and the structure of the guide plate is determined according to the shape of the guide plate between the first intersection position and the second intersection position.

[0020] Preferably, a plurality of guide plates are provided, and the plurality of guide plates are respectively the first guide plate to the nth guide plate;

[0021] Determining a first intersection position of the second end of the guide plate and the outflow edge of the smoke baffle plate, comprising: determining the first intersection position of the second end of the guide plate and the outflow edge of the smoke baffle plate according to a reference point and a first preset distance;

[0022] Determining a second intersection position of the first end of the guide plate or an extension line of the first end and the side edge of the smoke shield, comprising: determining the second intersection position of the first end of the guide plate or an extension line of the first end and the side edge of the smoke shield according to a reference point and a second preset distance;

[0023] The first preset distance of the Xth guide plate satisfies the first relational expression, which is:

[0024] L 1X =R X +A 1X

[0025] The second preset distance of the Xth guide plate satisfies the second relational expression, which is:

[0026] L 2X =R X +A 2X

[0027] in:

[0028]

[0029] 1≤X≤n, and X is an integer, L 1X Indicates the first preset distance corresponding to the Xth guide plate, R X represents the radius of the characteristic circle corresponding to the Xth guide plate with the reference point as the center, e represents the natural constant, Q X represents the flow rate out of the area surrounded by the Xth guide plate and smoke baffle, D X Indicates the thickness of the Xth guide plate, V X It represents the tangential velocity of the fluid at the intersection of the characteristic circle and the outflow edge; L 2X Indicates the second preset distance corresponding to the Xth guide plate.

[0030] Preferably, the Xth guide plate includes a first plate portion and a second plate portion;

[0031] Determine the shape of the deflector, including:

[0032] Draw the first characteristic square corresponding to the Xth guide plate, with one vertex of the first characteristic square as the reference point and the side length a of the first characteristic square X Satisfies the third relation, which is:

[0033]

[0034] With the first circle center O 1 is the center of the circle and the first radius r 1 The first arc is drawn with the radius and the first intersection position as the starting position. The first plate portion of the Xth guide plate extends along the direction of the first arc. The first center O 1 Located outside the smoke baffle, with the first circle center O 1 is the vertex on the same diagonal as the reference point in the first characteristic square, and the first radius r 1 O is the center of the first circle 1 The distance from the first intersection position;

[0035] Draw the second characteristic square corresponding to the Xth guide plate, with one vertex of the second characteristic square as the reference point and the side length b of the second characteristic square X The fourth relation is satisfied:

[0036]

[0037] With the second center O 2 is the center of the circle and the second radius r 2 The second arc is drawn with the radius and the second intersection position as the starting position. The second plate portion of the Xth guide plate extends along the direction of the second arc. The second center O 2 Located on the smoke baffle, and the second circle center O 2 is the vertex on the same diagonal as the reference point in the second characteristic square, and the second radius r 2 The second center O 2 The distance to the second intersection location.

[0038] Provided is a range hood comprising the above smoke shielding assembly, or comprising a smoke shielding assembly designed and formed by the above smoke shielding assembly design method.

[0039] Beneficial effects of the present invention:

[0040] The smoke shield assembly and its design method, and the range hood provided by the present invention have multiple guide plates on one side of the smoke shield. By setting the guide plates, the oil smoke on one side of the smoke shield can be guided, so that the oil smoke can flow along the extension direction of the guide plates under the guidance of the guide plates. The multiple guide plates can separate the oil smoke into multiple parts and guide them separately to avoid the generation of eddy flow areas due to collision of oil smoke in different directions, so that the flow mode of oil smoke on one side of the smoke shield is closer to laminar flow. Without the obstruction of the eddy flow area, the oil smoke can be quickly drawn away, thereby improving the smoke exhaust efficiency of the range hood using the smoke shield assembly. In addition, the reduction of the eddy flow area can also reduce the noise of the oil smoke flow, so that the noise of the range hood is lower during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0042] Figure 1 The structure of the kitchenware provided by the embodiment of the present invention is shown in FIG. Figure 1 ;

[0043] Figure 2The structure of the kitchenware provided by the embodiment of the present invention is shown in FIG. Figure 2 ;

[0044] Figure 3 The structure of the smoke barrier assembly provided by the embodiment of the present invention is shown in FIG. Figure 1 ;

[0045] Figure 4 The smoke shielding assembly provided by the embodiment of the present invention is schematically shown in FIG. Figure 2 ;

[0046] Figure 5 is a side view of a smoke barrier assembly provided by an embodiment of the present invention;

[0047] Figure 6 It is the flow field diagram of the smoke baffle plate facing the smoke collecting plate when the smoke baffle plate is not provided with a guide plate and an oil guide structure;

[0048] Figure 7 It is the flow field diagram of the smoke baffle plate facing the smoke collecting plate when the smoke baffle plate is provided with a guide plate and an oil guide structure;

[0049] Figure 8 is a flow chart of a design method of a smoke barrier assembly provided by an embodiment of the present invention;

[0050] Fig. 9 The smoke shielding assembly provided by the embodiment of the present invention is schematically shown in FIG. Figure 3 .

[0051] In the figure:

[0052] 100, smoke baffle; 101, first vertex; 102, second vertex; 110, inlet edge; 120, outlet edge; 200, guide plate; 201, first end; 202, second end; 210, first plate portion; 211, first guide surface; 220, second plate portion; 221, second guide surface; 230, first guide plate; 240, second guide plate; 250, third guide plate; 300, oil guide structure; 400, smoke collecting plate; 410, smoke collecting channel; 420, gap; 500, center line;

[0053] 10. Main chassis; 20. Oil cup;

[0054] 1. Reference point; 2. First characteristic square; 3. Second characteristic square; 4. Characteristic circle. DETAILED DESCRIPTION

[0055] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, not all.

[0056] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0057] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the present invention, unless otherwise clearly stipulated and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. In the description of this embodiment, unless otherwise specified, "multiple" specifically refers to two or more.

[0059] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0060] 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 a central element.

[0061] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0062] First, as Figures 1 to 5 As shown, an embodiment of the present invention provides a range hood, which is a household appliance with a smoke extraction function. For example, the range hood can be an integrated range hood or a non-integrated range hood, which is not limited in this embodiment.

[0063] In some embodiments, the range hood includes a main box 10, an oil cup 20 and a smoke shielding assembly. The main box 10 is provided with a smoke inlet. A power device such as a fan is provided in the main box 10 to generate negative pressure, thereby drawing smoke through the smoke inlet and exhausting it to the outside. The oil cup 20 is provided below the smoke shielding assembly to receive oil. The smoke shielding assembly in this embodiment includes a smoke shielding plate 100 and a guide plate 200.

[0064] like Figure 3 As shown, the smoke shield 100 has an inlet edge 110 and an outlet edge 120. The inlet edge 110 can cooperate with other structures (such as a smoke collecting plate) to form an air inlet (not shown in the figure). The outlet edge 120 can cooperate with other structures (such as a smoke collecting plate) to form an outlet, and the outlet is connected to the main box 10 (such as Figure 2 The smoke inlet (not shown in the figure) is arranged relatively to the smoke inlet (not shown in the figure) of the smoke shield 100, so that the oil smoke flowing out of the air outlet can directly enter the smoke inlet. In some optional embodiments, one or more inflow edges 110 are provided. For example, in this embodiment, the upper edge of the smoke shield 100 is the outflow edge 120, and the lower edge and two side edges of the smoke shield 100 are the inflow edges 110.

[0065] For example, Figure 3 As shown, the guide plate 200 is arranged on one side of the smoke baffle 100, and is used to guide the oil smoke on one side of the smoke baffle 100 to the air outlet. There are multiple guide plates 200, and the multiple guide plates 200 are all arranged on one side of the smoke baffle 100, and the multiple guide plates 200 are arranged at intervals along the length direction of the smoke baffle 100, so that a guide space can be formed between two adjacent guide plates 200, that is, one side of the smoke baffle 100 can have multiple guide spaces. The guide space is used for the oil smoke to circulate. Exemplarily, each guide space can be similar to a suction nozzle, so that the entrance of each guide space can have a large negative pressure to improve the smoking performance.

[0066] The smoke shield assembly provided in the present embodiment is provided with a plurality of guide plates 200 on one side of the smoke shield 100. By providing the guide plates 200, the oil smoke on one side of the smoke shield 100 can be guided so that the oil smoke can flow along the extension direction of the guide plates 200 under the guidance of the guide plates 200. The plurality of guide plates 200 can separate the oil smoke into multiple parts and guide them separately to avoid the generation of eddy flow zones due to collision of oil smoke in different directions, so that the flow mode of the oil smoke on one side of the smoke shield 100 is closer to laminar flow. Without the obstruction of the eddy flow zone, the oil smoke can be quickly drawn away, thereby improving the smoke exhaust efficiency of the range hood using the smoke shield assembly. In addition, the reduction of the eddy flow zone can also reduce the noise of the oil smoke flow, so that the noise of the range hood is lower during operation.

[0067] Exemplarily, the first end 201 of each guide plate 200 extends to the inlet edge 110, and the second end 202 of each guide plate 200, which is arranged opposite to the first end 201, extends to the outlet edge 120, so as to guide the oil smoke from the inlet edge 110 to the outlet edge 120, thereby achieving the diversion of the oil smoke and improving the smoking effect.

[0068] In order to further improve the smoking effect, the guide plate 200 is configured to be curved so that the first ends 201 of the plurality of guide plates 200 can be distributed more evenly on the inlet edge 110 .

[0069] For example, Figure 4 As shown, the smoke baffle 100 has a first vertex 101 and a second vertex 102. In this embodiment, the first vertex 101 and the second vertex 102 are located at both ends of the outflow edge 120. A portion of the guide plates 200 of the plurality of guide plates 200 is bent toward the first vertex 101, so that the first ends 201 of the portion of the guide plates 200 can be dispersed at the inflow edge 110 near the first vertex 101. Figure 3 As shown, the distance between the second ends 202 of the guide plate 200 can be smaller and more concentrated, so as to be directly opposite to the smoke inlet, so that the distance between the oil smoke guided to the outflow edge 120 and the smoke inlet can be smaller, thereby reducing the probability of oil smoke overflowing and improving the smoking effect and efficiency.

[0070] Similarly, another portion of the guide plate 200 is bent toward the second vertex 102, so that the first end 201 of the other portion of the guide plate 200 can disperse the inlet edge 110 near the second vertex 102, and the distance between the second ends 202 of the other portion of the guide plate 200 can be smaller and more concentrated, which is convenient for facing the smoke inlet, so that the first ends 201 of the multiple guide plates 200 can be distributed more evenly at the inlet edge 110, so as to further improve the smoking effect.

[0071] For example, Figure 4As shown, the multiple guide plates 200 toward the first vertex 101 and the multiple guide plates 200 toward the second vertex 102 are symmetrically arranged with the center line 500 in the length direction of the smoke baffle 100 as the symmetry axis, so that the entire flow field formed can be more uniform, thereby improving the uniformity of oil fume absorption and further improving the smoking efficiency and suction effect.

[0072] In some optional embodiments, the guide plate 200 has a guide surface for contacting and guiding the oil smoke, and, as Figure 3 As shown, the guide plate 200 includes a first plate portion 210 and a second plate portion 220 connected to each other. The first plate portion 210 has a first curved guide surface 211, and the second plate portion 220 has a second curved guide surface 221 adjacent to the first guide surface 211, that is, the guide surface of the guide plate 200 includes the first guide surface 211 and the second guide surface 221.

[0073] In this embodiment, the tangent line passing through the end point of the first guide surface 211 close to one end of the second guide surface 221 and tangent to the first guide surface 211 is the first tangent line (not shown in the figure), and the tangent line passing through the end point of the second guide surface 221 close to one end of the first guide surface 211 and tangent to the second guide surface 221 is the second tangent line (not shown in the figure). The first tangent line and the second tangent line are colinear, that is, the first guide surface 211 and the second guide surface 221 have a smooth transition. The above structure of the first guide surface 211 and the second guide surface 221 enables the surface shape of the guide plate 200 to better fit the flow direction of the oil smoke, avoiding the problem of vortex generated due to the sudden change of the oil smoke flow path. The reduction of vortex is conducive to improving the oil smoke extraction efficiency of the range hood and can also reduce the noise when the range hood is running. In addition, the oil smoke fits the guide plate 200, which can increase the flow area of ​​each guide space, thereby increasing the exhaust volume, and further improving the oil smoke extraction efficiency of the range hood.

[0074] Optionally, the smoke exhaust assembly further includes an oil guide structure 300. Figure 3 and Figure 5 The oil guide structure 300 is disposed on the guide plate 200. One end of the oil guide structure 300 extends to the smoke baffle 100, so that the space formed by the oil guide structure 300 and the guide plate 200 can hold the oil in the smoke baffle 100. The other end of the oil guide structure 300 extends to the edge of the guide plate 200, and is used to guide the oil on the surface of the smoke baffle 100 and the guide plate 200 to drip into the oil cup 20, thereby preventing the oil in the smoke baffle 100 from dripping onto the stove.

[0075] In some optional embodiments, the other end of the oil guide structure 300 extends to the first end 201 of the guide plate 200 and is used to guide the oil to drip into the oil cup 20 of the range hood. Figure 5As shown, the edge of the oil guide structure 300 facing away from the smoke baffle 100 and the edge of the oil cup 20 facing the smoke baffle 100 are located in the same vertical plane to ensure that the oil can drip into the water cup.

[0076] The smoke shield assembly and range hood provided in the present embodiment are provided with a guide plate 200 on one side of the smoke shield 100. By providing the guide plate 200, the oil smoke on one side of the smoke shield 100 can be guided, so that the oil smoke can flow along the extension direction of the guide plate 200 under the guidance of the guide plate 200, thereby improving the smoking effect. In addition, the setting of the oil guide structure 300 allows the oil on the surface of the smoke shield 100 and the guide plate 200 to drip into the oil cup 20 under the guidance of the oil guide structure 300, thereby preventing the oil of the smoke shield assembly from dripping onto the stove. The range hood has high cleanliness and is easy to use.

[0077] In this embodiment, please continue to refer to Figure 4 When the guide plate 200 is curved, the oil guide structure 300 is arranged on the concave surface of the guide plate 200, so that the oil guide structure 300 can guide the oil dripping on the concave surface of the guide plate 200 under the action of gravity, and prevent the oil from dripping along the guide plate 200 to the stove.

[0078] It should be noted that the accumulated amount of oil on the surface of the smoke baffle 100 and the guide plate 200 is usually positively correlated with the distance that the oil smoke flows after entering the guide space, that is, the closer to the outflow edge 120, the more oil there is on the smoke baffle 100 and the guide plate 200. Therefore, the end of the oil guide structure 300 that abuts against the smoke baffle 100 can be set to exceed the center of the width direction of the smoke baffle 100 or the center of the length direction of the guide plate 200 to improve the oil guide effect. The bottom part of the smoke baffle 100 and the guide plate 200 has little or no oil attached to it, so it will not drip on the stove.

[0079] Alternatively, if Figure 5 As shown, the angle between the oil guide structure 300 and the smoke baffle 100 is α, 10°≤α≤30°, so that the length of the oil guide structure 300 can be longer to ensure the oil guide effect. If the angle between the oil guide structure 300 and the smoke baffle 100 is too large, the length of the oil guide structure 300 will be short, the length of the oil guide will be short, the guide effect will be poor, and the oil on the top of the smoke baffle 100 and the guide plate 200 will not be guided by the oil guide structure 300, but will drip from the space between the oil guide structure 300 and the smoke baffle 100 to the stove, which is not conducive to the cleanliness of the stove; if the angle between the oil guide structure 300 and the smoke baffle 100 is too small, the other end of the oil guide structure 300 will not be able to extend to the oil cup, and thus the oil cannot be guided to the oil cup 20. For example, the angle between the oil guide structure 300 and the smoke baffle 100 is 10°, 15°, 20°, 25°, 30°, etc.

[0080] Alternatively, if Figure 4 As shown, the thickness of the oil guide structure 300 is d, 5mm≤d≤10mm. If the thickness of the oil guide structure 300 is too large, it will increase the overall weight of the smoke barrier assembly, which is not conducive to the lightweight of the smoke barrier assembly, and it will occupy a large space, affecting the flow space of the oil smoke. If the thickness of the oil guide structure 300 is too small, it will increase the difficulty of manufacturing. For example, the thickness of the oil guide structure 300 is 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc.

[0081] For example, the guide plate 200 and the smoke baffle 100 may be an integrated structure or a split structure. When the guide plate 200 and the smoke baffle 100 are split structures, the guide plate 200 may be fixed to the smoke baffle 100 by screw connection, clamping connection, magnetic connection, etc., which is not limited in this embodiment.

[0082] In some optional embodiments, the guide plate 200 and the oil guide structure 300 are an integrated structure, for example, the guide plate 200 and the oil guide structure 300 are integrally formed to have a higher structural strength. Of course, it is understandable that the guide plate 200 and the oil guide structure 300 can also be a split structure, and the two can be connected by a snap connection, a magnetic connection, etc.

[0083] For example, Figure 1 and Figure 2 As shown, the smoke barrier assembly also includes a smoke collecting plate 400. The smoke collecting plate 400 is arranged opposite to the smoke barrier 100, and a smoke collecting channel 410 is formed between the smoke collecting plate 400 and the smoke barrier 100, and the guide plate 200 is arranged in the smoke collecting channel 410. The smoke collecting channel 410 is used to allow oil smoke to flow. The smoke collecting channel 410 can have a plurality of sub-channels, and the sub-channels can be formed by a guide plate 200, a smoke collecting plate 400 and a smoke barrier 100, or by two relatively arranged guide plates 200, a smoke collecting plate 400 and a smoke barrier 100, that is, the above-mentioned guide space is formed by the cooperation of the smoke collecting plate 400, and this embodiment is not limited to this.

[0084] Alternatively, if Figure 2 As shown, the guide plate 200 extends from the side of the smoke baffle plate 100 to the smoke collecting plate 400, so that the sub-channels can be relatively independent, preventing mutual interference between two adjacent sub-channels, facilitating the redistribution of the flow field, and also increasing the overall speed of the oil smoke and improving the smoking effect.

[0085] It should be noted that by providing the guide plate 200, and the guide plate 200 extending to the smoke collecting plate 400, the formed sub-channel is relatively sealed, which prevents the sound from diffusing outward, thereby reducing the noise during the operation of the range hood and achieving the noise reduction function.

[0086] In some optional embodiments, such as Figure 2As shown, there is a gap 420 between the oil guide structure 300 and the smoke collecting plate 400 , and the gap 420 is used for oil to flow through, so that the oil can flow smoothly into the oil cup 20 .

[0087] For example, the smoke baffle 100 and the smoke collecting plate 400 may both be L-shaped and include a horizontal portion (not shown in the figure) and a vertical portion (not shown in the figure). The guide plate 200 in this embodiment is arranged in the vertical portion.

[0088] Figure 6 This is a flow field diagram of the smoke baffle 100 provided in this embodiment when the guide plate 200 and the oil guide structure 300 are not provided, and the smoke baffle 100 faces the smoke collecting plate 400. Figure 7 The flow field diagram is a flow field diagram of the smoke baffle 100 facing the smoke collecting plate 400 when the smoke baffle 100 is provided with the guide plate 200. The flow field diagram can be calculated by numerical simulation software. For example, the numerical simulation software can be ANSYS CFX, Fluent and other software, but is not limited thereto.

[0089] from Figure 6 It can be seen from the figure that the flow velocity in the flow field exceeds 2 m / s in a small area, the overall area is small, and the flow velocity at the inlet edge 110 of the smoke baffle 100 is less than 2 m / s. Figure 7 It can be seen that there are many areas in the flow field where the flow velocity exceeds 2 m / s, and the overall area is large. The high flow velocity area can improve the smoking ability. In addition, the flow velocity at the inlet edge 110 of the smoke baffle 100 is high, which can effectively increase the suction force at the bottom and side of the smoke baffle 100. It can be seen that the smoke baffle assembly and range hood provided in this embodiment have a good smoking effect.

[0090] And, from Figure 7 It can also be seen that in multiple sub-channels, the flow rate is greater than 3m / s, and even reaches 4m / s, which further improves the suction power and smoking effect of the range hood.

[0091] In addition, from Figure 7 It can also be seen that, under the guidance of the guide plate 200, no eddy current is generated in the oil smoke during the flow process, so the noise during the operation of the range hood can be effectively reduced.

[0092] In this embodiment, the smoke baffle 100 provided with the guide plate 200 and the oil guide structure 300 can optimize the oil fume flow field and improve the oil fume absorption efficiency. At the same time, the change of the flow field can also reduce noise and energy consumption. The guide plate 200 adopts a streamlined design to guide the oil fume to flow along a predetermined path, effectively improving the air performance of the smoke baffle assembly. The oil guide structure 300 is installed on the guide plate 200, which can guide the oil stains adsorbed on the smoke baffle 100 toward the surface of the smoke collecting plate 400 and the surface of the guide plate 200 to flow into the oil cup 20. The combined use of the smoke baffle 100, the guide plate 200 and the oil guide structure 300 not only improves the oil fume absorption efficiency, but also prevents the probability of oil dripping on the stove, and reduces the noise when the range hood is running.

[0093] In a second aspect, this embodiment provides a design method for a smoke barrier assembly, which is used to design the smoke barrier assembly in the first aspect. The design method for the smoke barrier assembly includes a guide plate design step, such as Figure 8 As shown, the guide plate design steps include:

[0094] S100, determining a first intersection position between the second end 202 of the guide plate 200 and the outflow edge 120 of the smoke baffle 100;

[0095] S200, determining a second intersection position of the first end 201 of the guide plate 200 or an extension line of the first end 201 and a side edge of the smoke baffle 100 or an extension line of the smoke baffle 100;

[0096] S300, determining the shape of the guide plate 200, and determining the structure of the guide plate 200 according to the shape of the guide plate 200 between the first intersection position and the second intersection position.

[0097] The design method of the smoke shield assembly provided in the present embodiment first determines the first intersection position of the second end 202 of the guide plate 200 and the outflow edge 120 of the smoke shield 100, and determines the second intersection position of the first end 201 of the guide plate 200 or the extension line of the guide plate 200 and the side edge of the smoke shield 100 or the extension line of the smoke shield 100, then determines the shape of the guide plate 200, and determines the structure of the guide plate 200 between the first intersection position and the second intersection position according to the shape of the guide plate 200, so that a smoke shield assembly with the guide plate 200 can be obtained, the oil fume absorption efficiency of the smoke shield assembly is improved, and an oil guide structure 300 is formed on the guide plate 200 to prevent oil from dripping on the stove.

[0098] In some optional embodiments, in step S100, the first intersection position of the second end 202 of the guide plate 200 and the outflow edge 120 of the smoke baffle 100 can be determined according to the reference point 1 and the first preset distance. In step S100, the reference point 1 can be a point on the smoke baffle 100, or can be a point other than the smoke baffle 100, which is not limited in this embodiment. In this embodiment, when the guide plate 200 is designed to face the first vertex 101, the reference point 1 can be the vertex of the first vertex 101; when the guide plate 200 is designed to face the second vertex 102, the reference point 1 can be the vertex of the second vertex 102. The first preset distance in step S100 and the second preset distance in step S200 can be pre-set values, or can be values ​​calculated by a relational expression, which is not limited in this embodiment.

[0099] Similarly, the second intersection position of the first end 201 of the guide plate 200 or an extension line of the first end 201 and the side edge of the smoke baffle 100 or an extension line of the smoke baffle 100 can be determined according to the reference point 1 and the second preset distance.

[0100] In this embodiment, the first end 201 of the guide plate 200 extends to the lower edge of the smoke baffle 100. At this time, the first end 201 of the guide plate 200 does not intersect with the side edge of the smoke baffle 100. Fig. 9 As shown, the intersection position of the extension line of the first end 201 and the extension line of the smoke baffle 100 can be determined as the second intersection position.

[0101] It should be noted that the order of step S100 and step S200 can be adjusted, and this embodiment does not limit this.

[0102] In step S300, the shape of the guide plate 200 may be a shape in the prior art, such as an arc, or a shape obtained by calculation, which is not limited in this embodiment.

[0103] Optionally, when there are multiple guide plates 200, the multiple guide plates 200 are respectively the first guide plate to the nth guide plate. The first preset distance of the Xth guide plate satisfies a first relational expression, which is:

[0104] L 1X =R X +A 1X

[0105] The second preset distance of the Xth guide plate satisfies the second relational expression, which is:

[0106] L 2X =R X +A 2X

[0107] in:

[0108]

[0109] L 1X Indicates the first preset distance corresponding to the Xth guide plate, R X represents the radius of the characteristic circle 4 corresponding to the Xth guide plate with the reference point 1 as the center; e represents a natural constant, Q X It represents the amount of fluid flowing out of the area surrounded by the guide surface of the Xth guide plate per unit time, D X Indicates the thickness of the Xth guide plate, V X represents the tangential velocity of the fluid at the intersection of the characteristic circle 4 and the outflow edge 120; L 2X Indicates the second preset distance corresponding to the Xth guide plate.

[0110] Among them, Q X It is a preset value. For example, the total flow rate of oil smoke in the smoke collecting channel 410 (i.e., the channel formed between the smoke baffle 100 and the smoke collecting plate 400) can be determined first, and then the flow rate of each sub-channel can be determined according to the number of sub-channels that are expected to be formed as needed (i.e., the channel formed by a guide plate 200, a smoke collecting plate 400 and a smoke baffle 100, or the channel formed by two relatively arranged guide plates 200, smoke collecting plates 400 and smoke baffles 100).

[0111] In this embodiment, V X It may also be a preset value, for example, selected within a certain speed range, or set according to actual needs, which is not limited in this embodiment.

[0112] It should be noted that the area surrounded by the guide surface of the Xth guide plate can be understood as the area between the smoke baffle plate 100 and the smoke collecting plate 400 and located on one side of the guide surface of the guide plate 200 .

[0113] For example, Fig. 9 As shown, the plurality of guide plates 200 include a first guide plate 230, a second guide plate 240 and a third guide plate 250. Taking the first guide plate 230 as an example, the R corresponding to the first guide plate 230 1 , A 11 、V 1 , Q 1 , A 21 All marked in Fig. 9 In. Among them:

[0114] L 11 =R 1 +A 11

[0115] L 21 =R 1+A 21

[0116]

[0117] Alternatively, if Fig. 9 As shown, the radius of the characteristic circle 4 corresponding to the plurality of guide plates 200 may be the same. In this case, A 11 , A 12 and A 13 The first preset distances corresponding to the guide plates 200 are different. 21 , A 22 and A 23 The second preset distances corresponding to the guide plates 200 are different. Of course, it can be understood that the radii of the characteristic circles 4 corresponding to the multiple guide plates 200 can also be different.

[0118] In some optional embodiments, the radius of the characteristic circle 4 may be a value that is positively correlated with the size of the smoke baffle 100. For example, the radius of the characteristic circle 4 is 1 / 4 to 2 / 3 of the width of the smoke baffle 100, that is, the radius of the characteristic circle 4 is a value selected within a range. The selected range is 1 / 4 to 2 / 3 of the width of the smoke baffle 100, and the specific selected value is not limited in this embodiment. For example, the radius of the characteristic circle 4 is 1 / 4, 1 / 2, or 2 / 3 of the width of the smoke baffle 100.

[0119] Optionally, the Xth guide plate in this embodiment includes a first plate portion 210 and a second plate portion 220 .

[0120] In step S300, determining the shape of the guide plate 200 includes:

[0121] S310, draw a first characteristic square 2 corresponding to the Xth guide plate, one vertex of the first characteristic square 2 is the reference point 1, and the side length a of the first characteristic square 2 is X Satisfies the third relation, which is:

[0122]

[0123] S320, with the first circle center O 1 is the center of the circle and the first radius r 1 The first arc is drawn with the radius and the first intersection position as the starting position. The first plate portion 210 of the Xth guide plate extends along the direction of the first arc. The first center O 1 Located outside the smoke baffle 100, and the first circle center O 1 is the vertex of the first characteristic square 2 that is on the same diagonal as the reference point 1, and the first radius r 1 O is the center of the first circle 1 The distance from the first intersection position;

[0124] S330, draw a second characteristic square 3 corresponding to the Xth guide plate, one vertex of the second characteristic square 3 is the reference point 1, and the side length b of the second characteristic square 3 is X The fourth relation is satisfied:

[0125]

[0126] S340, with the second center O 2 is the center of the circle and the second radius r 2 The second arc is drawn with the radius and the second intersection position as the starting position. The second plate portion 220 of the Xth guide plate extends along the second arc direction. The second center O 2 Located at the smoke baffle 100, and the second circle center O 2 is the vertex of the second characteristic square 3 that is on the same diagonal as the reference point 1, and the second radius r 2 The second center O 2 The distance to the second intersection location.

[0127] In this embodiment, the first characteristic square 2 is located outside the smoke baffle 100, and one vertex of the first characteristic square 2 is the reference point 1, and the extension direction of one side of the first characteristic square 2 is the same as the extension direction of the outflow edge 120. 1 is located on the same diagonal line of the first characteristic square 2 as the reference point 1. 1 When X Draw the first feature square 2, then find the vertex of the first feature square 2 that is on the same diagonal as the reference point 1, and use the vertex as the first circle center O 1 Then, according to the first preset distance corresponding to the Xth guide plate, the first intersection position of the second end 202 of the guide plate 200 and the outflow edge 120 of the smoke baffle 100 is determined, and the first center O 1 The distance between the first intersection position and the first radius r 1 . Then, with the first circle center O 1 is the center of the circle and the first radius r 1 A first arc is drawn with a radius of φ and a first intersection position as a starting position, and the first plate portion 210 of the guide plate 200 extends along the first arc.

[0128] Similarly, the second characteristic square 3 is located in the smoke baffle 100, and one vertex of the second characteristic square 3 is the reference point 1, and the extension direction of one side of the second characteristic square 3 is the same as the extension direction of the outflow edge 120. In step S320, the second circle center O 2is located on the same diagonal line of the second characteristic square 3 as the reference point 1. 2 When X Draw the second characteristic square 3, then find the vertex in the second characteristic square 3 that is on the same diagonal as the reference point 1, and use the vertex as the second circle center O 2 Then, according to the second preset distance corresponding to the Xth guide plate, the second intersection position of the first end 201 of the guide plate 200 or the extension line of the first end 201 and the side edge of the smoke baffle 100 is determined, and the second center O 2 The distance between the second intersection position and the second radius r 2 Then, with the second circle center O 2 is the center of the circle and the second radius r 2 A second arc is drawn with a radius of φ and a second intersection position as a starting position, and the second plate portion 220 of the guide plate 200 extends along the second arc.

[0129] It should be noted that the sequence of step S310 and step S330 can be adjusted according to actual needs, and this embodiment does not limit this.

[0130] By drawing the first characteristic square 2 and the second characteristic square 3 , it is convenient to draw the first arc and the second arc, and further to form the first plate portion 210 and the second plate portion 220 .

[0131] For example, since the first characteristic square 2 is used to draw the intersection position of the corresponding smoke baffle 100 in the length direction, and the second characteristic square 3 is used to draw the intersection position of the corresponding smoke baffle 100 in the width direction, the side length of the first characteristic square 2 can be greater than the side length of the second characteristic square 3.

[0132] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this embodiment can be executed in parallel, sequentially, or in different orders, as long as the desired results of the technical solution of this embodiment can be achieved, and this document does not limit this.

[0133] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A smoke barrier assembly, characterized in that: include: Smoke shield (100); A plurality of guide plates (200) are provided, and the plurality of guide plates (200) are all arranged on one side of the smoke baffle (100), and the plurality of guide plates (200) are arranged at intervals along the length direction of the smoke baffle (100), and a guide space for oil smoke circulation is formed between two adjacent guide plates (200).

2. The smoke barrier assembly according to claim 1, characterized in that: The smoke baffle (100) has a first vertex angle (101) and a second vertex angle (102); a portion of the guide plates (200) among the plurality of guide plates (200) are bent toward the first vertex angle (101), and another portion of the guide plates (200) are bent toward the second vertex angle (102).

3. The smoke barrier assembly according to claim 2, characterized in that: The plurality of guide plates (200) facing the first vertex (101) and the plurality of guide plates (200) facing the second vertex (102) are symmetrically arranged with the center line (500) in the length direction of the smoke baffle (100) as a symmetry axis.

4. The smoke barrier assembly according to claim 2, characterized in that: The guide plate (200) comprises a first plate portion (210) and a second plate portion (220) which are connected; The first plate portion (210) has a first curved flow guide surface (211), the second plate portion (220) has a second curved flow guide surface (221) adjacent to the first flow guide surface (211), a tangent line passing through an end point of the first flow guide surface (211) close to one end of the second flow guide surface (221) and tangent to the first flow guide surface (211) is a first tangent line, a tangent line passing through an end point of the second flow guide surface (221) close to one end of the first flow guide surface (211) and tangent to the second flow guide surface (221) is a second tangent line, and the first tangent line and the second tangent line are collinear.

5. The smoke barrier assembly according to any one of claims 1 to 4, characterized in that: The smoke shield assembly further comprises an oil guide structure (300), wherein the oil guide structure (300) is arranged on the guide plate (200), one end of the oil guide structure (300) extends to the smoke shield (100), and the other end of the oil guide structure (300) extends to the edge of the guide plate (200), and the oil guide structure (300) is used to guide the oil on the surface of the smoke shield (100) and the guide plate (200) to drip onto the oil cup (20).

6. The smoke barrier assembly according to claim 5, characterized in that: The angle between the oil guide structure (300) and the smoke baffle (100) is α, and 10°≤α≤30°.

7. A method for designing a smoke barrier assembly, used for designing a smoke barrier assembly as claimed in any one of claims 1 to 6, characterized in that: The design method of the smoke barrier assembly includes a guide plate design step, and the guide plate design step includes: Determining a first intersection position of the second end (202) of the guide plate (200) and the outflow edge (120) of the smoke baffle (100); Determining a second intersection position of the first end (201) of the guide plate (200) or an extension line of the first end (201) and the side edge of the smoke baffle (100); The shape of the guide plate (200) is determined, and the structure of the guide plate (200) is determined between the first intersection position and the second intersection position according to the shape of the guide plate (200).

8. The design method of the smoke barrier assembly according to claim 7, characterized in that: The guide plates (200) are provided in plurality, and the plurality of guide plates (200) are respectively a first guide plate to an nth guide plate; Determining a first intersection position of the second end (202) of the guide plate (200) and the outflow edge (120) of the smoke baffle (100), comprising: determining the first intersection position of the second end (202) of the guide plate (200) and the outflow edge (120) of the smoke baffle (100) according to a reference point (1) and a first preset distance; Determining a second intersection position of the first end (201) of the guide plate (200) or an extension line of the first end (201) and the side edge of the smoke shield (100), comprising: determining the second intersection position of the first end (201) of the guide plate (200) or an extension line of the first end (201) and the side edge of the smoke shield (100) according to a reference point (1) and a second preset distance; The first preset distance of the Xth guide plate satisfies a first relational expression, which is: L 1X =R X +A 1X The second preset distance of the Xth guide plate satisfies a second relational expression, which is: L 2X =R X +A 2X in: 1≤X≤n, and X is an integer, L 1X represents the first preset distance corresponding to the Xth guide plate, R X represents the radius of the characteristic circle (4) corresponding to the Xth guide plate with the reference point (1) as the center, e represents a natural constant, Q X represents the flow rate flowing out of the area surrounded by the Xth guide plate and the smoke baffle (100), D X Indicates the thickness of the Xth guide plate, V X represents the tangential velocity of the fluid at the intersection of the characteristic circle (4) and the outflow edge (120); L 2X Indicates the second preset distance corresponding to the Xth guide plate.

9. The design method of the smoke barrier assembly according to claim 8, characterized in that: The Xth guide plate comprises a first plate portion (210) and a second plate portion (220); Determining the shape of the guide plate (200) comprises: Draw a first characteristic square (2) corresponding to the Xth guide plate, wherein a vertex of the first characteristic square (2) is the reference point (1), and the side length a of the first characteristic square (2) is X Satisfies the third relational expression, which is: A first arc is drawn with a first circle center O1 as the circle center, a first radius r1 as the radius, and a first intersection position as the starting position, the first plate portion (210) of the Xth guide plate extends along the direction of the first arc, the first circle center O1 is located outside the smoke baffle (100), and the first circle center O1 is the vertex of the first characteristic square (2) that is located on the same diagonal as the reference point (1), and the first radius r1 is the distance between the first circle center O1 and the first intersection position; Draw a second characteristic square (3) corresponding to the Xth guide plate, wherein a vertex of the second characteristic square (3) is the reference point (1), and the side length b of the second characteristic square (3) is X The fourth relational expression is satisfied, and the fourth relational expression is: A second arc is drawn with the second circle center O2 as the circle center, the second radius r2 as the radius, and the second intersection position as the starting position, the second plate portion (220) of the Xth guide plate extends along the second arc direction, the second circle center O2 is located on the smoke baffle (100), and the second circle center O2 is the vertex of the second characteristic square (3) that is located on the same diagonal as the reference point (1), and the second radius r2 is the distance between the second circle center O2 and the second intersection position.

10. A range hood, characterized in that: A smoke barrier assembly comprising the smoke barrier assembly as described in any one of claims 1 to 6, or a smoke barrier assembly designed and formed by the design method of the smoke barrier assembly as described in any one of claims 7 to 9.

Images