Smoke inlet device and range hood

Abstract

This invention provides a smoke intake device and a range hood, relating to the technical field of kitchen appliances. In this solution, a drive mechanism is used to control a smoke baffle to move between the top air inlet and the side air inlet, thereby forming a side air intake state and a top air intake state. Therefore, the overall structure of the range hood is simplified, the volume is reduced, and the cost is also reduced.

Description

Technical Field

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

[0002] To reduce the escape of cooking fumes and adapt to various cooking scenarios, range hoods on the market now feature both top and side smoke inlets.

[0003] The top smoke inlet of this range hood is sealed by a top baffle located at the top, allowing it to be opened and closed; the side smoke inlet is sealed by a side baffle located at the side, allowing it to be opened and closed.

[0004] Because the top and side baffles of this type of range hood are driven by top and side drive modules respectively, and there are many baffles and drive modules, the range hood is large in size, has a complex internal structure, and high manufacturing cost. Summary of the Invention

[0005] The purpose of this invention is to provide a smoke inlet device and a range hood to alleviate the technical problems of existing range hoods being large in size, complex in internal structure, and high in manufacturing cost.

[0006] In a first aspect, the present invention provides a smoke inlet device, comprising:

[0007] A smoke hood, wherein a top air inlet is provided on the top of the smoke hood and a side air inlet is provided on the side of the smoke hood;

[0008] Smoke baffle;

[0009] A driving mechanism is connected to the smoke baffle and the smoke collection hood respectively, and is used to drive the smoke baffle to switch between a side air intake state and a top air intake state. When the smoke baffle is in the side air intake state, the smoke baffle completely blocks the top air intake and the side air intake is completely open; when the smoke baffle is in the top air intake state, the smoke baffle completely blocks the side air intake and the top air intake is completely open.

[0010] Furthermore, the driving mechanism includes a sliding component and a push rod mechanism. The sliding component is connected to the smoke baffle and the push rod mechanism respectively. The push rod mechanism drives the smoke baffle to move by pushing the sliding component.

[0011] Furthermore, the sliding assembly includes a top guide rail, a side guide rail, a top slider, and a side slider. The top guide rail is parallel to the plane where the top air inlet is located, and the side guide rail is parallel to the plane where the side air inlet is located. The top slider is slidably connected to the top guide rail, and the side slider is slidably connected to the side guide rail.

[0012] The smoke baffle is movably connected to the top slider and the side slider, respectively;

[0013] The push rod mechanism is connected to the top slider or the side slider.

[0014] Furthermore, the smoke baffle is provided with a hinge structure, which includes an upper hinge that is rotatably connected to the top slider and a lower hinge that is hinged to the side slider.

[0015] The smoke hood is provided with a first clearance groove to avoid the hinge structure.

[0016] Furthermore, the smoke hood is provided with an independent mounting cavity and a smoke guiding cavity. The mounting cavity is used to accommodate the drive mechanism. The top air inlet and the side air inlet are respectively connected to the smoke guiding cavity, and the smoke guiding cavity is connected to the fan system.

[0017] Furthermore, the number of mounting cavities in the smoke collection hood is two, and the two mounting cavities are respectively located on the left and right sides of the smoke guiding cavity; the number of sliding components is two, and the two sliding components are respectively connected to the left and right ends of the smoke baffle.

[0018] Furthermore, of the upper hinge and the lower hinge, the upper hinge is closer to the upper edge of the smoke baffle, and the lower hinge is closer to the lower edge of the smoke baffle; the hinge fixing hole of the upper hinge is located outside the upper edge of the smoke baffle, and the hinge fixing hole of the lower hinge is located outside the lower edge of the smoke baffle.

[0019] Furthermore, the hinge fixing hole of the upper hinge is installed at a height of b1 on the smoke baffle, and the distance between it and the upper edge of the smoke baffle is a1; the hinge fixing hole of the lower hinge is installed at a height of b2 on the smoke baffle, and the distance between it and the lower edge of the smoke baffle is a2; the angle between the plane containing the side air inlet and the horizontal plane is α, the angle between the top air inlet and the horizontal plane is β, the distance between the hinge fixing hole of the upper hinge and the outer plane containing the top air inlet is h1, and the distance between the hinge fixing hole of the lower hinge and the outer plane containing the side air inlet is h2; when the smoke baffle is in the side air inlet state, the angle between the smoke baffle and the outer plane containing the top air inlet is γ1; when the smoke baffle is in the top air inlet state, the angle between the smoke baffle and the outer plane containing the side air inlet is γ2.

[0020] When the smoke baffle is in the top air intake state, it satisfies Formula 1 and Formula 2.

[0021] Formula 1

[0022] Formula 2

[0023] When the smoke baffle is in the side air intake state, it satisfies formulas 3 and 4.

[0024] Formula 3

[0025] Formula 4

[0026] Formulas 1, 2, 3, and 4 above must satisfy the following prerequisites:

[0027] When γ1 > 0, then When γ1=0, then ;Formula 5

[0028] Formula 6.

[0029] Furthermore, the sliding assembly includes an arc-shaped guide rail and a slider, the slider being slidably connected to the arc-shaped guide rail, and the smoke baffle being connected to the slider;

[0030] The push rod mechanism is connected to the slider.

[0031] Furthermore, the smoke baffle has an airflow distribution state. When the smoke baffle is in the airflow distribution state, it blocks a portion of the top air inlet and a portion of the side air inlet.

[0032] Furthermore, both ends of the smoke baffle are provided with side plates connected to the smoke baffle, and the smoke collection hood is provided with a second clearance groove to avoid the side plates. During the process of the smoke baffle switching between the side air intake state and the top air intake state, the end of the side plate away from the smoke baffle always extends into the second clearance groove to prevent pressure loss at both ends of the smoke baffle.

[0033] Furthermore, the side plate is arc-shaped, and the side edge of the side plate is formed by a straight edge and an arc-shaped edge connected end to end. The straight edge is connected to the smoke baffle, and the arc-shaped edge is used to avoid interference between the side plate and the smoke collection hood.

[0034] Furthermore, it also includes a height detection module and a controller, the controller being connected to the height detection module and the drive mechanism, respectively;

[0035] The height detection module is used to detect the height h of the pot under the range hood;

[0036] The controller can acquire the height value h and compare the height value h with the preset height value H. When the height value h of the pot is greater than or equal to the preset height value H, the controller controls the smoke baffle to switch to the top air intake mode.

[0037] When the height h of the cookware is less than the preset height H, the baffle plate is switched to side air intake mode.

[0038] Furthermore, it also includes components connected to the controller:

[0039] The first oil fume detection module detects the amount of oil fume escaping from the top surface of the range hood, A.

[0040] The second oil fume detection module detects the amount of oil fume absorbed by the top air inlet, B.

[0041] The third oil fume detection module detects the amount of oil fume escaping C from the side of the range hood;

[0042] The fourth oil fume detection module detects the amount of oil fume absorbed (D) at the side air inlet;

[0043] The controller acquires the amount of oil fume escaping A, the amount of oil fume absorbed B, the amount of oil fume escaping C, and the amount of oil fume absorbed D. When (A+C) / (B+D) is greater than or equal to k, the oil fume escapes.

[0044] When fumes escape, the controller adjusts the state of the baffle plate to make the amount of fumes escaping from the top and sides the same, and to reduce the total amount of fumes escaping from the top and sides.

[0045] Secondly, the present invention provides a range hood including the aforementioned smoke inlet device.

[0046] The present invention has at least the following advantages or beneficial effects:

[0047] The smoke inlet device provided by the present invention includes: a smoke collection hood, a smoke baffle, and a driving mechanism. The top of the smoke collection hood is provided with a top air inlet, and the side of the smoke collection hood is provided with a side air inlet. The driving mechanism is connected to the smoke baffle and the smoke collection hood respectively, and is used to drive the smoke baffle to switch between a side air inlet state and a top air inlet state. When the smoke baffle is in the side air inlet state, the smoke baffle completely blocks the top air inlet and the side air inlet is completely open. When the smoke baffle is in the top air inlet state, the smoke baffle completely blocks the side air inlet and the top air inlet is completely open.

[0048] In this design, a drive mechanism controls a baffle plate to move between the top and side air inlets, creating both side and top air intake states. This simplifies the overall structure of the range hood, reducing its size and cost. The range hood can adapt to different cooking conditions. For example, when the cookware is low, the fumes will escape from the lower position. Therefore, the drive mechanism switches the baffle plate to the side air intake state, concentrating the negative pressure generated by the fan system at the side air inlet, closer to the source of the fumes, resulting in better fume extraction for low-height cookware. Conversely, when the cookware is high, the fumes will escape from the higher position. Therefore, the drive mechanism switches the baffle plate to the top air intake state, concentrating the negative pressure at the top air inlet, closer to the source of the fumes, resulting in better fume extraction for higher cookware. By adjusting the baffle plate's position according to the cookware height and the fumes' escape pattern, the range hood matches the fume location and reduces fume escape.

[0049] The range hood provided by this invention includes the aforementioned smoke inlet device. Because the range hood provided by this invention utilizes the aforementioned smoke inlet device, it also possesses the advantages of a smoke inlet device. Attached Figure Description

[0050] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0051] Figure 1 This is a schematic diagram of the smoke baffle of the smoke inlet device provided in an embodiment of the present invention when it is in the side air inlet state;

[0052] Figure 2 for Figure 1 A magnified view of a portion of position A in the middle;

[0053] Figure 3 This is a schematic diagram of the smoke baffle of the smoke inlet device provided in an embodiment of the present invention when it is in the top air inlet state;

[0054] Figure 4 A schematic diagram of the smoke baffle of the smoke inlet device provided in an embodiment of the present invention when it is in the airflow distribution state;

[0055] Figure 5 This is a schematic diagram of the internal structure of the smoke inlet device provided in an embodiment of the present invention;

[0056] Figure 6This is a side view of the internal structure of the smoke inlet device provided in an embodiment of the present invention;

[0057] Figure 7 A schematic diagram of the smoke baffle of the smoke inlet device provided in an embodiment of the present invention;

[0058] Figure 8 A side view of the smoke baffle of the smoke inlet device provided in an embodiment of the present invention;

[0059] Figure 9 A schematic diagram of the top slider of the smoke inlet device provided in an embodiment of the present invention;

[0060] Figure 10 A schematic diagram of the side slider of the smoke inlet device provided in an embodiment of the present invention;

[0061] Figure 11 A schematic diagram showing the smoke baffle of the smoke inlet device provided in an embodiment of the present invention in a side air intake state;

[0062] Figure 12 A simplified diagram of the smoke baffle of the smoke inlet device provided in an embodiment of the present invention when it is in the side air inlet state;

[0063] Figure 13 A schematic diagram showing the smoke baffle of the smoke inlet device provided in an embodiment of the present invention in the top air intake state;

[0064] Figure 14 This is a simplified diagram of the smoke baffle of the smoke inlet device provided in the embodiment of the present invention when it is in the top air intake state.

[0065] Icons: 100 - Smoke hood; 110 - Top air inlet; 120 - Side air inlet; 130 - First clearance groove; 140 - Second clearance groove; 150 - Inner cavity partition;

[0066] 200 - Smoke baffle; 210 - Upper hinge; 220 - Lower hinge; 230 - Side panel;

[0067] 310 - Push rod mechanism; 320 - Top guide rail; 330 - Side guide rail; 340 - Top slider; 341 - First fixing hole; 350 - Side slider; 351 - Second fixing hole; 352 - Shaft;

[0068] 400-Fan system. Detailed Implementation

[0069] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0070] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0071] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0072] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are 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, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0073] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0074] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0075] like Figures 1-4As shown, the smoke inlet device provided by the present invention includes: a smoke collection hood 100, a smoke baffle 200, and a driving mechanism. The smoke collection hood 100 is shaped like a "7", with a top air inlet 110 at its top and a side air inlet 120 on its side. The top air inlet 110 has a better absorption effect on oil fumes from higher locations, while the side air inlet 120 has a better absorption effect on oil fumes generated at lower locations.

[0076] The drive mechanism is connected to the smoke baffle 200 and the smoke collection hood 100 respectively, and can drive the smoke baffle 200 to switch between side air intake state, top air intake state and air volume distribution state. The smoke baffle 200 is a complete plate structure. One drive mechanism controls the movement of one smoke baffle 200 between the top air intake 110 and the side air intake 120, thereby forming the side air intake state, top air intake state and air volume distribution state. Moreover, the air volume distribution state can be directly formed during the transition from the side air intake state to the top air intake state. Therefore, the overall structure of the range hood is simplified, the volume is reduced, and the cost is also reduced.

[0077] The baffle 200 moves between the top air inlet 110 and the side air inlet 120, thereby changing the opening of the top air inlet 110 and the side air inlet 120. Since the negative pressure of the range hood is provided by the fan system 400, the negative pressure generated by the fan system 400 is distributed at the two air inlets. Changing the position of the baffle 200 can change the negative pressure at the top air inlet 110 and the side air inlet 120. Figure 1 As shown, when the smoke baffle 200 is in the side air intake state, the smoke baffle 200 completely blocks the top air intake 110, while the side air intake 120 is completely open; as Figure 3 As shown, when the smoke baffle 200 is in the top air intake state, the smoke baffle 200 completely blocks the side air intake 120, while the top air intake 110 is completely open; as Figure 4 As shown, when the smoke baffle 200 is in the airflow distribution state, the smoke baffle 200 blocks part of the top air inlet 110 and part of the side air inlet 120.

[0078] Because the baffle 200 in this design can switch between side air intake, top air intake, and airflow distribution modes, it can adapt to different cooking situations. For example, when the cookware is low, the fumes generated will overflow from a lower position. Therefore, the drive mechanism switches the baffle 200 to the side air intake mode, which concentrates the negative pressure generated by the fan system 400 at the side air intake 120, closer to the source of the fumes, resulting in better fume extraction for low-height cookware. Conversely, when the cookware is high, the fumes generated will overflow from a higher position. Therefore, the drive mechanism switches the baffle 200 to the top air intake mode, which concentrates the negative pressure generated by the fan system 400 at the top air intake 110, closer to the source of the fumes, resulting in better fume extraction for taller cookware. Users have found that even with side or top air intake, some cooking fumes still escape. The fume baffle 200 can be adjusted to the airflow distribution setting based on the location of the escaping fumes, thereby reducing escape. The fume baffle 200 can be adjusted according to the height of the cookware and the extent of fume escape to match the fume location and minimize escape.

[0079] like Figure 5 and Figure 6 As shown, the driving mechanism includes a sliding assembly and a push rod mechanism 310. The sliding assembly includes a fixed part fixedly connected to the smoke hood 100 and a sliding part slidably connected to the fixed part. The smoke baffle 200 is connected to the sliding part. The movable end of the push rod mechanism 310 is connected to the sliding part, and the smoke baffle 200 is moved by pushing the sliding part. The sliding part slides along the fixed part, and the movement path is unique.

[0080] In this embodiment, the sliding assembly includes a top guide rail 320, a side guide rail 330, a top slider 340, and a side slider 350. Both ends of the top guide rail 320 and the side guide rail 330 are provided with fixing seats, which can be connected to the inner wall of the smoke hood 100 via screws. The top guide rail 320 is parallel to the plane of the top air inlet 110, and the side guide rail 330 is parallel to the plane of the side air inlet 120. Furthermore, both the top guide rail 320 and the side guide rail 330 are parallel to the rotation direction of the smoke baffle 200.

[0081] The top slider 340 is slidably connected to the top guide rail 320, and the side slider 350 is slidably connected to the side guide rail 330. The smoke baffle 200 is movably connected to both the top slider 340 and the side slider 350. The push rod mechanism 310 is connected to either the top slider 340 or the side slider 350. In this embodiment, the push rod mechanism 310 can be located at the lower part of the smoke hood 100. The movable end of the push rod mechanism 310 is connected to the shaft 352 on the side slider 350. The side slider 350 moves up and down by pushing and pulling. When the side slider 350 moves, it drives the smoke baffle 200, which in turn drives the top slider 340, thereby switching the state of the smoke baffle 200.

[0082] Specifically, such as Figure 9 and Figure 10 As shown, the smoke baffle 200 is provided with a hinge structure, which includes an upper hinge 210 that is rotatably connected to the first fixing hole 341 on the top slider 340, and a lower hinge 220 that is hinged to the second fixing hole 351 on the side slider 350.

[0083] like Figure 2 and Figure 3 As shown, the smoke hood 100 is provided with a first clearance groove 130 for the clearance hinge structure. According to the position of the upper hinge 210 and the lower hinge 220, the top surface and the side surface of the smoke hood 100 are provided with the first clearance groove 130.

[0084] like Figure 5 As shown, to reduce the pollution of the drive mechanism by oil fumes, the fume hood 100 is provided with an independent mounting cavity and a smoke guiding cavity, which are separated by an inner cavity partition 150. The mounting cavity is used to accommodate the drive mechanism; the top air inlet 110 and the side air inlet 120 are respectively connected to the smoke guiding cavity, which is connected to the fan system 400. Therefore, when the range hood is working, the oil fumes enter the fan system 400 after passing through the smoke guiding cavity and will not enter the mounting cavity.

[0085] In this embodiment, in order to make the left and right ends of the smoke baffle 200 move in unison, there are two mounting cavities in the smoke collection hood 100, and the two mounting cavities are located on the left and right sides of the smoke guiding cavity, respectively; there are two sliding components, and the two sliding components are connected to the left and right ends of the smoke baffle 200, respectively. The sliding components located on the left and right sides have the same structure, which can achieve synchronous movement.

[0086] like Figure 6As shown, the principle of the up-and-down movement of the smoke baffle 200 is as follows: After the push rod mechanism 310 extends to its maximum position, it drives the side slider 350 to reach the highest point along the side guide rail 330. Because the smoke baffle 200, the side slider 350, and the top slider 340 are connected by a hinge, when the side slider 350 moves upward along the side guide rail 330, the top slider 340 moves forward along the top track. When it reaches its maximum position, the smoke baffle 200 completely covers the top air inlet 110, and the range hood is in a side air intake state. When the push rod mechanism 310 retracts, it drives the side slider 350 to move downward along the side guide rail 330, and the top slider 340 moves backward along the top guide rail 320. The smoke baffle 200 moves backward and downward. When the push rod mechanism 310 retracts to its minimum value, the smoke baffle 200 completely covers the side air inlet 120 on the rear side, and the range hood is in a top air intake state. When the push rod mechanism 310 drives the side slider 350 to a position between the maximum and minimum stroke, the baffle plate 200 blocks part of the top air inlet 110 and part of the side air inlet 120, allowing the two exposed air inlets to enter the air simultaneously. The air volume depends on the exposed air intake area of ​​the two air inlets at this position. At this time, the range hood is in the air volume distribution state.

[0087] like Figures 8-14 As shown, of the upper hinge 210 and the lower hinge 220, the upper hinge 210 is closer to the upper edge of the smoke baffle 200, and the lower hinge 220 is closer to the lower edge of the smoke baffle 200. The hinge fixing hole of the upper hinge 210 is located outside the upper edge of the smoke baffle 200, and the hinge fixing hole of the lower hinge 220 is located outside the lower edge of the smoke baffle 200. The upper hinge 210 and the lower hinge 220 can extend into the smoke hood during state switching, and can avoid interference between the smoke baffle 200 and the smoke hood 100.

[0088] During the up-and-down movement of the smoke baffle 200, the smoke baffle 200 should not interfere with the smoke collection hood 100. Therefore, the hinge fixing holes provided on the smoke baffle 200 need to meet the following relationship:

[0089] The hinge fixing hole of the upper hinge 210 is at an installation height of b1 on the smoke baffle 200, and the distance between it and the upper edge of the smoke baffle 200 is a1; the hinge fixing hole of the lower hinge 220 is at an installation height of b2 on the smoke baffle 200, and the distance between it and the lower edge of the smoke baffle 200 is a2; the angle between the plane of the side air inlet 120 and the horizontal plane is α (preset, known), and the angle between the top air inlet 110 and the horizontal plane is β (preset, known). The hinge fixing hole of the upper hinge 210 and the top air inlet 110 are at the same height. The distance between the outer planes where 0 is located is h1 (preset, known); the distance between the hinge fixing hole of the lower hinge 220 and the outer plane where the side air inlet 120 is located is h2 (preset, known); when the smoke baffle 200 is in the side air inlet state, the angle between the smoke baffle 200 and the outer plane where the top air inlet 110 is located is γ1 (preset, known); when the smoke baffle 200 is in the top air inlet state, the angle between the smoke baffle 200 and the outer plane where the side air inlet 120 is located is γ2 (preset, known).

[0090] like Figure 13 and Figure 14 As shown, when the smoke baffle 200 is in the top air intake state, the smoke baffle 200 does not interfere with the smoke collection hood 100. Taking the limit of just contacting the smoke collection hood 100, we get:

[0091]

[0092] From the above formula, we can conclude that the following requirements must be met when setting a1 and a2:

[0093] Formula 1

[0094] Formula 2

[0095] like Figure 11 and Figure 12 As shown, when the smoke baffle 200 is in the side air intake state, the smoke baffle 200 does not interfere with the smoke collection hood 100. Taking the limit of just contacting the smoke collection hood 100, we get:

[0096]

[0097] From the above formula, we can conclude that the following requirements must be met when setting a1 and a2:

[0098] Formula 3

[0099] Formula 4

[0100] Formulas 1, 2, 3, and 4 above must satisfy the following prerequisites:

[0101] When γ1 > 0, then When γ1=0, then ;Formula 5

[0102] Formula 6.

[0103] In summary, for the given motion-related parameters α, β, h1, h2, γ1, γ2 of the smoke baffle 200, under the condition that the smoke baffle 200 does not interfere with the smoke hood 100 during any motion or the smoke hood 100 does not need to provide an additional avoidance structure for the motion of the smoke baffle 200, the hinge position of the smoke baffle 200 should satisfy the conditions of formulas 1, 2, 3, 4, 5, and 6.

[0104] In other feasible solutions, the single-sided double guide rail form can be changed to a single-sided single curved guide rail. That is, in this embodiment, the sliding component can include an arc-shaped guide rail and a slider. The slider is slidably connected to the arc-shaped guide rail, and the movement path of the slider is an arc. The smoke baffle 200 is connected to the slider, thereby realizing the arc movement of the smoke baffle 200.

[0105] like Figure 7 As shown, both ends of the smoke baffle 200 are provided with side plates 230 perpendicularly connected to the smoke baffle 200. The smoke hood 100 is provided with a second clearance groove 140 to avoid the side plates 230, and the end of the side plate 230 away from the smoke baffle 200 extends into the second clearance groove 140. When the smoke baffle 200 slides up and down, the arc-shaped edge of the side plate 230 is always hidden inside the smoke hood 100. In this way, the side plate 230, the smoke baffle 200 and the smoke hood 100 always form a sealed space, avoiding air leakage at both ends of the smoke baffle 200. Preferably, the side plate 230 is arc-shaped, and its arc-shaped edge extends into the second clearance groove 140. The arc-shaped structure can prevent the smoke baffle 200 from interfering with the smoke hood when it is in the side air intake state and the top air intake state.

[0106] To prevent air leakage in the first clearance groove 130 and the second clearance groove 140, the first clearance groove 130 and the second clearance groove 140 can be set on the corresponding side wall of the mounting cavity.

[0107] The state of the smoke baffle 200 can be switched manually by the user or automatically. Specifically, the smoke inlet device also includes a height detection module and a controller. The controller is connected to the height detection module and the drive mechanism, respectively. The height detection module is used to detect the height h of the pot below the range hood. The controller can obtain the height h and compare it with the preset height H. When the height h of the pot is greater than or equal to the preset height H, the smoke baffle 200 is controlled to switch to the top air inlet mode. When the height h of the pot is less than the preset height H, the smoke baffle 200 is controlled to switch to the side air inlet mode.

[0108] In this embodiment, the height detection module can be a laser detection module, which obtains the height value h of the cookware. The laser detection module is set on the top surface of the range hood and can emit a detection laser to the cookware below. Based on the distance between the top surface of the range hood and the cookware, the approximate height of the cookware can be calculated. When the height value h of the cookware is less than the preset height value H, the cookware is too low, and the fumes generated in the cookware will overflow from the lower position. Therefore, the range hood can execute the side air intake mode, that is, switch the smoke baffle 200 to the side air intake state. This concentrates the negative pressure generated by the fan system 400 at the side air intake 120, which is closer to the position where the fumes are generated, and the range hood has a better effect on sucking out low-height cookware. Conversely, when the height h of the cookware is greater than or equal to the preset height H, the cookware is relatively tall, and the fumes generated in the cookware will escape from a higher position. Therefore, the range hood can operate in top-intake mode, switching the baffle 200 to top-intake mode. This concentrates the negative pressure generated by the fan system 400 at the top air inlet 110, which is closer to the source of the fumes, resulting in better fume extraction for taller cookware. The opening of the side and top air inlets 110 is adjusted according to the height of the cookware to match the position of the fumes and reduce fume escape.

[0109] The device also includes four oil fume detection modules connected to the controller: a first oil fume detection module, a second oil fume detection module, a third oil fume detection module, and a fourth oil fume detection module. The first oil fume detection module detects the amount of oil fume escaping from the top surface of the range hood (A); the second oil fume detection module detects the amount of oil fume absorbed through the top air inlet 110 (B); the third oil fume detection module detects the amount of oil fume escaping from the side of the range hood (C); and the fourth oil fume detection module detects the amount of oil fume absorbed through the side air inlet 120 (D). The controller acquires the oil fume escape amount A, the oil fume absorption amount B, the oil fume escape amount C, and the oil fume absorption amount D. Oil fume escape occurs when (A+C) / (B+D) is greater than or equal to k. The value of k can range from 10% to 20%. In other words, if the total escape volume from the top and sides exceeds a certain limit, it proves that the fumes are escaping, and the opening of the top air inlet 110 or the side air inlet 120 needs to be adjusted to balance the escape volume from the top and sides; conversely, when (A+C) / (B+D) is less than k, it means that the escape volume is relatively small and within the allowable range, so no action is needed.

[0110] When fumes escape, the controller adjusts the state of the baffle plate 200 to make the amount of fumes escaping from the top and sides the same, and to reduce the total amount of fumes escaping from the top and sides.

[0111] Of the top air inlet 110 and the side air inlet 120, the one with a larger smoke volume is located on the main air inlet side, and the other is located on the secondary air inlet side.

[0112] In other words, when B > D, the top surface is the primary air intake side and the sides are the secondary air intake side; when B < D, the sides are the primary air intake side and the top surface is the secondary air intake side. Furthermore, when fumes are detected escaping, the range hood may be in top air intake mode (top air intake fully open at 110°, side air intake fully closed at 120°). Figure 3 As shown, it may also be in side air intake mode (top air intake 110° fully closed, side air intake 120° fully open), such as Figure 1 As shown. It may also be in an airflow distribution mode (both the top air inlet 110 and the side air inlet 120 are partially open, and the sum of their openings equals the fully open opening of either the top or side air inlet 120), such as... Figure 4 As shown.

[0113] Furthermore, depending on the different escape amounts on the main air intake side and the secondary air intake side, it can be divided into two situations: oil fume escape at the main air intake and oil fume escape at the non-main air intake.

[0114] When the amount of oil fume escaping from the secondary air intake side is greater than that from the main air intake side, oil fume escapes from the non-main air intake. In this case, it is necessary to increase the opening of the air intake on the secondary air intake side and decrease the opening of the air intake on the main air intake side, thereby increasing the negative pressure at the air intake on the secondary air intake side. Specifically, for example, when the range hood is in top air intake mode, B > D = 0, the top surface is on the main air intake side, the side surface is on the secondary air intake side, and C > A, it means that most of the oil fume generated by the cookware is not absorbed by the top air intake 110, but escapes from the lower side surface. In this case, it is necessary to open part of the side air intake 120 and decrease part of the opening of the top air intake 110, so that more of the negative pressure generated by the fan system 400 is distributed to the side air intake 120, which will absorb the oil fume escaping from the side surface. For example, when the range hood is in airflow distribution mode, and B > D > 0, the top surface is the main air intake side, the side surface is the secondary air intake side, and C > A, a larger amount of fumes escape from the lower side surface. In this case, it is necessary to increase the opening of the side air intake 120 and reduce the opening of some of the top air intake 110, so that more of the negative pressure generated by the fan system 400 can be distributed to the side air intake 120 to absorb the fumes escaping from the side surface.

[0115] When the amount of oil fume escaping on the main air intake side is greater than that on the secondary air intake side, the oil fume is escaping from the main air intake. Even though the main air intake side can absorb a lot of oil fume, there is still more oil fume escaping from this side, indicating that the negative pressure on the main air intake side is still insufficient and needs to be further increased.

[0116] In this embodiment, the step of increasing the negative pressure at the smoke inlet on the main air intake side may specifically include the following steps:

[0117] When the openings of both the top air inlet 110 and the side air inlet 120 are greater than zero, i.e., when the range hood is in airflow distribution mode, the opening of the main air inlet is increased while the opening of the secondary air inlet is decreased. This distributes more negative pressure to the main air inlet, reducing the escape of fumes from the main air inlet. For example, when the range hood is in airflow distribution mode, and B > D > 0, the top is the main air inlet and the side is the secondary air inlet, and A > C. More fumes escape from the top. In this case, it is necessary to increase the opening of the top air inlet 110 and decrease the opening of the side air inlet 120, distributing more of the negative pressure generated by the fan system 400 to the top air inlet 110 to absorb the fumes escaping from the top.

[0118] The specific steps to increase the negative pressure at the smoke inlet on the main air intake side include:

[0119] When one of the top air inlet 110 and the side air inlet 120 is closed and the other is open, meaning the range hood is in either top or side air intake mode, and one side air inlet is completely closed, escape can no longer be reduced by distributing negative pressure. Therefore, the fan speed can be increased to generate more negative pressure at the fan system 400. For example, initially, the range hood is at speed level one; increasing the fan speed can put it at speed level two, providing more negative pressure.

[0120] The range hood provided by this invention includes the aforementioned smoke inlet device. Because the range hood provided by this invention utilizes the aforementioned smoke inlet device, it also possesses the advantages of a smoke inlet device.

[0121] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A smoke inlet device, characterized in that, include: A smoke hood (100) is provided with a top air inlet (110) and a side air inlet (120) on the side of the smoke hood (100). Smoke baffle (200); The driving mechanism includes a sliding assembly and a push rod mechanism (310). The sliding assembly includes a fixed part fixedly connected to the smoke hood (100) and a sliding part slidably connected to the fixed part. The smoke baffle (200) is connected to the sliding part. The movable end of the push rod mechanism (310) is connected to the sliding part. By pushing the sliding part, the smoke baffle (200) is driven to move, thereby driving the smoke baffle (200) to move between the top air inlet (110) and the side air inlet (120), so that the smoke baffle (200) can switch between the side air inlet state, the top air inlet state, and the air volume distribution state. Alternatively, when the smoke baffle (200) is in the side air intake state, the smoke baffle (200) completely blocks the top air intake (110) and the side air intake (120) is completely open; when the smoke baffle (200) is in the top air intake state, the smoke baffle (200) completely blocks the side air intake (120) and the top air intake (110) is completely open; when the smoke baffle (200) is in the air volume distribution state, the smoke baffle (200) blocks a portion of the top air intake (110) and a portion of the side air intake (120).

2. The smoke inlet device according to claim 1, characterized in that, The sliding assembly includes a top guide rail (320), a side guide rail (330), a top slider (340), and a side slider (350). The top guide rail (320) is parallel to the plane of the top air inlet (110), and the side guide rail (330) is parallel to the plane of the side air inlet (120). The top slider (340) is slidably connected to the top guide rail (320), and the side slider (350) is slidably connected to the side guide rail (330). The smoke baffle (200) is movably connected to the top slider (340) and the side slider (350) respectively; The push rod mechanism (310) is connected to the top slider (340) or the side slider (350).

3. The smoke inlet device according to claim 2, characterized in that, The smoke baffle (200) is provided with a hinge structure, which includes an upper hinge (210) that is rotatably connected to the top slider (340) and a lower hinge (220) that is hinged to the side slider (350). The smoke hood (100) is provided with a first clearance groove (130) to avoid the hinge structure.

4. The smoke inlet device according to claim 1, characterized in that, The smoke hood (100) is provided with an independent mounting cavity and a smoke guiding cavity. The mounting cavity is used to accommodate the drive mechanism. The top air inlet (110) and the side air inlet (120) are respectively connected to the smoke guiding cavity, and the smoke guiding cavity is connected to the fan system (400).

5. The smoke inlet device according to claim 4, characterized in that, The number of mounting cavities in the smoke collection hood (100) is two, and the two mounting cavities are located on the left and right sides of the smoke guiding cavity, respectively; the number of sliding components is two, and the two sliding components are connected to the left and right ends of the smoke baffle (200), respectively.

6. The smoke inlet device according to claim 3, characterized in that, Of the upper hinge (210) and the lower hinge (220), the upper hinge (210) is closer to the upper edge of the smoke baffle (200), and the lower hinge (220) is closer to the lower edge of the smoke baffle (200); the hinge fixing hole of the upper hinge (210) is located outside the upper edge of the smoke baffle (200), and the hinge fixing hole of the lower hinge (220) is located outside the lower edge of the smoke baffle (200).

7. The smoke inlet device according to claim 6, characterized in that, The hinge fixing hole of the upper hinge (210) is at an installation height of b1 on the smoke baffle (200), and the distance between it and the upper edge of the smoke baffle (200) is a1; the hinge fixing hole of the lower hinge (220) is at an installation height of b2 on the smoke baffle (200), and the distance between it and the lower edge of the smoke baffle (200) is a2; the plane containing the side air inlet (120) has an angle α with the horizontal plane, the top air inlet (110) has an angle β with the horizontal plane, and the hinge fixing hole of the upper hinge (210) is at an angle β with the top edge of the smoke baffle (200). The distance between the outer planes of the air inlets (110) is h1, and the distance between the hinge fixing hole of the lower hinge (220) and the outer plane of the side air inlet (120) is h2; when the smoke baffle (200) is in the side air intake state, the angle between the smoke baffle (200) and the outer plane of the top air inlet (110) is γ1; when the smoke baffle (200) is in the top air intake state, the angle between the smoke baffle (200) and the outer plane of the side air inlet (120) is γ2. When the smoke baffle (200) is in the top air intake state, it satisfies Formula 1 and Formula 2. Official 1 Official 2 When the smoke baffle (200) is in the side air intake state, it satisfies formulas 3 and 4. Official 3 Official 4 Formulas 1, 2, 3, and 4 above must satisfy the following prerequisites: When γ1 > 0, then When γ1=0, then ;Formula 5 Official 6.

8. The smoke inlet device according to claim 1, characterized in that, The sliding assembly includes an arc-shaped guide rail and a slider, the slider being slidably connected to the arc-shaped guide rail, and the smoke baffle (200) being connected to the slider; The push rod mechanism (310) is connected to the slider.

9. The smoke inlet device according to any one of claims 1-8, characterized in that, Both ends of the smoke baffle (200) are provided with side plates (230) connected to the smoke baffle (200). The smoke collection hood (100) is provided with a second clearance groove (140) to avoid the side plates (230). During the process of switching between the side air intake state and the top air intake state of the smoke baffle (200), the end of the side plate (230) away from the smoke baffle (200) always extends into the second clearance groove (140) to prevent pressure leakage at the left and right ends of the smoke baffle (200).

10. The smoke inlet device according to claim 9, characterized in that, The side plate is arc-shaped, and the side edge of the side plate is formed by a straight edge and an arc-shaped edge connected end to end. The straight edge is connected to the smoke baffle (200), and the arc-shaped edge is used to avoid interference between the side plate and the smoke collection hood.

11. The smoke inlet device according to any one of claims 1-8, characterized in that, It also includes a height detection module and a controller, the controller being connected to the height detection module and the drive mechanism, respectively; The height detection module is used to detect the height h of the pot under the range hood; The controller can acquire the height value h and compare the height value h with the preset height value H. When the height value h of the pot is greater than or equal to the preset height value H, the controller controls the smoke baffle (200) to switch to the top air intake mode. When the height h of the cookware is less than the preset height H, the baffle plate (200) is switched to the side air intake mode.

12. The smoke inlet device according to claim 11, characterized in that, Also includes those connected to the controller: The first oil fume detection module detects the amount of oil fume escaping from the top surface of the range hood, A. The second oil fume detection module detects the amount of oil fume absorbed by the top air inlet (110) B; The third oil fume detection module detects the amount of oil fume escaping C from the side of the range hood; The fourth oil fume detection module detects the amount of oil fume absorbed D at the side air inlet (120); The controller acquires the amount of oil fume escaping A, the amount of oil fume absorbed B, the amount of oil fume escaping C, and the amount of oil fume absorbed D. When (A+C) / (B+D) is greater than or equal to k, the oil fume escapes. When the fumes escape, the controller adjusts the state of the baffle plate (200) so that the amount of fumes escaping from the top and sides is the same, and the total amount of fumes escaping from the top and sides is reduced.

13. A range hood, characterized in that, Includes the smoke inlet device as described in any one of claims 1-12.

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