Smoke guiding structure, smoke guiding control method and range hood

Abstract

This invention provides a smoke guiding structure, a smoke guiding control method, and a range hood. The smoke guiding structure includes a flue assembly and a smoke guiding component. The flue assembly has a flue opening at its bottom end and includes a flue back plate located on its back side and extending downwards beyond the flue opening. The smoke guiding component is located at the flue opening and is a porous box-shaped structure with a smoke guiding cavity formed internally, and each cavity wall of the smoke guiding cavity has smoke guiding holes. The smoke guiding component can translate in a direction approaching or away from the flue back plate. Based on the technical solution of this invention, the smoke guiding component, which can extend and retract, can block and guide rising smoke when extended, preventing smoke escape. Furthermore, it increases the contact surface with the smoke and expands the effective smoking area, thus ensuring smoking effect even with a large volume of smoke.

Description

Technical Field

[0001] This invention relates to the field of range hood technology, and particularly to a smoke guiding structure, a smoke guiding control method, and a range hood. Background Technology

[0002] As people's living standards improve, they are paying more and more attention to kitchen hygiene. Range hoods, as appliances for treating kitchen grease, are widely used in kitchen air purification. Range hoods remove cooking fumes from the kitchen, not only purifying the kitchen environment but also benefiting human health. However, the escaping fumes and odors can significantly impact the user experience. Furthermore, while current range hoods have increasingly higher airflow rates, this doesn't mean they can completely remove all fumes; some still escape. Therefore, improving the smoke extraction efficiency of range hoods has become a major challenge for the industry.

[0003] Currently, the industry has proposed solutions such as increasing the smoke collection area of ​​the smoke guide plate and increasing the air volume, but the effect is not ideal because the existing methods cannot effectively prevent the escape of oil fumes in terms of structure, and once the oil fumes escape the smoke collection area, they are difficult to be absorbed and collected again. Summary of the Invention

[0004] To address the problem that existing technologies cannot effectively prevent the escape of cooking fumes, this invention proposes a smoke guiding structure, a smoke guiding control method, and a range hood.

[0005] In a first aspect, the present invention provides a smoke guiding structure comprising:

[0006] A flue assembly having a flue opening at its bottom end, the flue assembly including a flue back plate disposed on its rear side and extending downward beyond the flue opening; and

[0007] A smoke guide is disposed at the flue opening. The smoke guide is constructed as a porous box-shaped structure with a smoke guiding cavity formed inside and smoke guiding holes opened on each cavity wall.

[0008] The smoke guide can be translated along the direction of approaching or moving away from the flue back plate, so as to close the flue opening when approaching and abutting the flue back plate, and open the flue opening when moving away from the flue back plate.

[0009] In one embodiment, the flue assembly further includes two flue side plates disposed on both sides and extending downward beyond the flue opening, wherein when the smoke guide closes the flue opening, the two sides of the smoke guide are directly opposite the two flue side plates.

[0010] In one embodiment, the side of the smoke guide relative to the back plate of the flue is configured as an open opening communicating with the smoke guide cavity;

[0011] The opening is closed by the back plate of the flue when the smoke guide abuts against the back plate of the flue, and is connected to the area corresponding to the flue opening when the smoke guide moves away from the back plate of the flue.

[0012] In one embodiment, the two sides of the smoke guide are movably connected to the flue back plate via a slide rail assembly, the slide rail assembly including a first slide rail fixed to the inner side of the flue back plate and a second slide rail fixed to the side of the smoke guide.

[0013] In one embodiment, the second slide rail is fixed to the cavity wall of the smoke guiding cavity at the position corresponding to the side of the smoke guiding member, and the second slide rail is fitted on the outside of the first slide rail.

[0014] In one embodiment, a telescopic drive component is also installed on the inner side of the flue back plate. The telescopic drive component extends in the same direction as the translational direction of the smoke guide component, and its telescopic end is fixedly connected to the smoke guide component.

[0015] In one embodiment, the front of the flue assembly has a relatively protruding front shell structure, the bottom of the front shell structure is higher than the flue opening, and an air curtain assembly is installed on the front side of the bottom of the front shell structure. The air curtain assembly is used to output airflow downward to form an air curtain that can correspond to the smoke guide.

[0016] The air curtain, the bottom surface of the front shell structure, and the flue assembly form a smoke guiding area, which is used to limit the escape of smoke rising above the location of the smoke guide and to redirect the rising smoke back to the smoke guide.

[0017] In one embodiment, the air curtain assembly includes a housing and cross-flow fan blades installed within the housing, the housing being fixed to the front side of the front shell structure and having a strip-shaped air outlet at the bottom for outputting airflow.

[0018] In one embodiment, the flue assembly is also provided with a smoke concentration sensor.

[0019] Secondly, the present invention proposes a range hood that includes the aforementioned smoke guiding structure, thereby possessing all the technical effects it possesses.

[0020] Thirdly, the present invention provides a smoke control method, which includes the following steps:

[0021] In response to the comparison between the current oil fume concentration value and the preset concentration range, the range hood is switched to the target level corresponding to the preset concentration range;

[0022] In response to the switching of the range hood's power setting, the smoke guide at the flue opening is controlled to move outward by a preset distance corresponding to the target power setting.

[0023] The above-mentioned technical features can be combined in various suitable ways or replaced by equivalent technical features, as long as the purpose of the present invention can be achieved.

[0024] The smoke guiding structure, smoke guiding control method, and range hood provided by this invention have at least the following advantages compared with the prior art:

[0025] The present invention discloses a smoke guiding structure, a smoke guiding control method, and a range hood. By providing a smoke guiding component that can extend and retract relative to each other at the flue opening, the smoke guiding component can block and guide the rising smoke when extended, preventing the smoke from escaping. In addition, it increases the contact surface with the smoke and expands the effective smoking area, thereby ensuring the smoking effect even when the smoke volume is large. Attached Figure Description

[0026] The invention will now be described in more detail with reference to embodiments and the accompanying drawings.

[0027] Figure 1 This shows a schematic diagram of the smoke guiding structure of the present invention when the smoke guiding component is retracted;

[0028] Figure 2 This shows a schematic diagram of the smoke guiding structure of the present invention when the smoke guiding element is extended;

[0029] Figure 3 A front view of the smoke guiding structure of the present invention is shown;

[0030] Figure 4 A schematic diagram of the smoke guide component of the smoke guide structure of the present invention is shown;

[0031] Figure 5 A schematic diagram of the cross-flow fan blade of the smoke guiding structure of the present invention is shown;

[0032] Figure 6 This shows a schematic diagram of another embodiment of the smoke guiding structure of the present invention;

[0033] Figure 7 Showing Figure 6 A magnified view of the structure within the dashed box;

[0034] Figure 8 Showing Figure 6 The diagram shows the state of the structure when the smoke guide is extended;

[0035] Figure 9 A flowchart illustrating the principle of the smoke control method of the present invention is shown.

[0036] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not to scale.

[0037] Figure label:

[0038] 1-Fluorise assembly, 11-Fluorise inlet, 12-Fluorise back plate, 121-Bracket, 13-Fluorise side plate, 14-Fluorise, 141-Outer branch, 142-Inner branch, 15-Smoke inlet chamber;

[0039] 2-Smoke guide component, 21-Smoke guide cavity, 22-Smoke guide hole, 23-Limiting block;

[0040] 3-Slide rail assembly, 31-First slide rail, 32-Second slide rail, 4-Front shell structure;

[0041] 5-Air curtain assembly, 51-Cross-flow fan blade, 52-Air outlet, 53-Air curtain;

[0042] 6-Smoke concentration sensor; 7-Smoke guiding zone;

[0043] 8-Partition assembly, 81-First fixed plate, 82-First movable plate, 83-Second fixed plate, 84-Second movable plate. Detailed Implementation

[0044] The invention will now be further described with reference to the accompanying drawings.

[0045] Example 1

[0046] An embodiment of the present invention provides a smoke guiding structure, including a flue assembly 1 and a smoke guiding component 2. The bottom end of the flue assembly 1 is provided with a flue opening 11, and the flue assembly 1 includes a flue back plate 12 disposed on the back and extending downward beyond the flue opening 11; the smoke guiding component 2 is disposed at the flue opening 11, and the smoke guiding component 2 is constructed as a porous box-shaped structure with a smoke guiding cavity 21 formed inside and smoke guiding holes 22 opened on each cavity wall of the smoke guiding cavity 21.

[0047] The smoke guide 2 can be translated along the direction of approaching or moving away from the flue back plate 12, so as to close the flue opening 11 when it approaches and abuts the flue back plate 12, and open the flue opening 11 when it moves away from the flue back plate 12.

[0048] Specifically, the flue assembly 1 is structurally designed to form the flue 14, as shown in the attached diagram. Figures 1 to 3As shown, the flue assembly 1 mainly includes a back panel 12, side panels 13, and a front panel 14, which together form the flue 14. The flue assembly 1 is vertically oriented, meaning the flue 14 extends vertically. The bottom of the flue 14 panel is the highest point, thus forming a gap at the bottom of the panel that connects to the outside, known as the flue opening 11. During use, the smoke guide structure is located diagonally above the cooktop. The smoke, guided by a fan, rises diagonally upwards to the flue opening 11 and enters the flue 14. However, some smoke may continue to rise and escape beyond the effective smoke extraction area near the flue opening 11, making it difficult to collect, especially with a large volume of smoke.

[0049] To address this problem, the present invention provides a smoke guide 2 at the flue opening 11. The smoke guide 2 is a porous box-shaped structure with multiple smoke guide holes 22 on each wall surface, as shown in the attached figure. Figure 4 As shown, the smoke guide 2 can also be translated relative to the flue assembly 1. Under normal conditions, the smoke guide 2 is retracted at the flue opening 11, as shown in the attached diagram. Figure 1 In the state shown, the smoke guide 2 is located directly below the flue opening 11, which is closed. Closing the flue opening 11 does not completely block the flue 14; rather, the smoke can enter the smoke guide chamber 21 inside the smoke guide 2 through the smoke guide hole 22 on the outer side of the smoke guide 2, and then enter the flue 14 through the smoke guide hole 22 on the inner side of the smoke guide 2. Therefore, the presence of the smoke guide 2 does not affect the normal collection of smoke. Furthermore, in this state, all smoke actually undergoes two filtrations by the smoke guide 2 during its entry into the flue 14, increasing the overall filtration frequency of oil fumes and improving the overall grease separation effect of the machine.

[0050] However, the enhanced filtration effect of the smoke guide 2 on the smoke will affect the instantaneous flow rate of the smoke to some extent. Therefore, the smoke guide 2 is preferably retracted at the flue opening 11 when the amount of smoke is not large.

[0051] For situations where the volume of smoke is large and it is prone to rising and escaping, the state of the smoke guide 2 can be switched so that it extends forward relative to the smoke duct assembly 1, as shown in the attached diagram. Figure 2 The state shown in the attached diagram Figure 2 The image shows the smoke guide 2 extended to its maximum distance, but the specific extension distance of the smoke guide 2 can be adjusted and controlled according to actual conditions. Figure 2Taking the illustrated state as an example, the smoke guide 2 protrudes from the flue assembly 1 and is located in the path of the rising smoke. It effectively blocks the rising smoke, thus redirecting most of the rising smoke back to the flue opening 11. Furthermore, because the smoke guide 2 has a porous box-like structure, when extended, all five outer surfaces (top and bottom, left and right, and front) can contact the smoke, increasing the contact area. The smoke can enter the smoke guide cavity 21 through the smoke guide hole 22 on any of these surfaces and ultimately enter the flue 14. Therefore, in addition to blocking the rising smoke, the smoke guide 2 increases the contact area with the smoke and expands the effective smoking area, thus ensuring a good smoking effect even with a large volume of smoke.

[0052] Furthermore, based on the porous box-shaped structure of the smoke guide 2, the smoke guide holes 22 on it actually reduce the flow area relatively. As a result, with the fan air volume remaining unchanged, the smoke flow velocity at the smoke guide holes 22 is greater, the local negative pressure is stronger, and the suction is also stronger. This can improve the smoking effect for the rising smoke, which does not account for a very large proportion of the total amount (most of the smoke is directly absorbed through the flue 11 under the obstruction and guidance of the smoke guide 2).

[0053] Furthermore, the bottom end of the flue assembly 1 is located in the smoke inlet chamber 15, which is situated below the smoke guide 2 and is used to allow the main body of the flue gas to enter. When the smoke guide 2 is retracted, the main body of the flue gas first enters the smoke inlet chamber 15, then enters the smoke guide 2, and finally enters the flue 14. When the smoke guide 2 is extended, the smoke inlet chamber 15 is directly connected to the flue outlet 11, the main body of the flue gas first enters the smoke inlet chamber 15, and then directly enters the flue 14, while the remaining rising flue gas enters the flue 14 via the smoke guide 2.

[0054] Furthermore, the flue assembly 1 also includes two flue side plates 13 disposed on both sides and extending downward beyond the flue opening 11. When the flue opening 11 is closed, the two sides of the flue guide 2 are directly opposite the two flue side plates 13.

[0055] Specifically, as shown in the attached diagram. Figure 3 As shown, the bottom of the flue side plates 13 on both sides is lower than the flue opening 11 (i.e., lower than the bottom of the flue 14 panel), and the part of the flue side plate 13 near the bottom corresponds to the smoke guide 2 in height. When the smoke guide 2 is retracted, since the amount of smoke is not large, the need for the smoke guide holes 22 on both sides of the smoke guide 2 is not large. Therefore, the flue side plates 13 on both sides cover the two sides of the smoke guide 2 (face to face or with a small gap), mainly to limit the two sides of the smoke guide 2, to protect the smoke guide 2, and to improve the overall stability of the flue assembly 1 and the smoke guide 2.

[0056] Furthermore, the side of the smoke guide 2 that is relatively close to the flue back plate 12 is configured as an open opening that communicates with the smoke guide cavity 21; wherein, the opening is closed by the flue back plate 12 when the smoke guide 2 abuts against the flue back plate 12, and communicates with the area corresponding to the flue opening 11 when the smoke guide 2 is away from the flue back plate 12.

[0057] Specifically, as shown in the attached diagram. Figure 2 As shown, the left side of the smoke guide 2 is open, which allows the smoke guide cavity 21 inside the smoke guide 2 to directly connect to the area corresponding to the flue opening 11 after it extends. Thus, when the amount of smoke is large and there is smoke rising, the rising smoke can directly enter the flue 14 after entering the smoke guide cavity 21. Compared with a design without an open opening, this reduces the number of times the rising smoke is filtered, thereby reducing the wind resistance of the smoke flow. It can relatively increase the flow rate of smoke absorption and improve the fluidity of smoke absorption, thus effectively and quickly absorbing the rising smoke.

[0058] Furthermore, the two sides of the smoke guide 2 are movably connected to the flue back plate 12 via the slide rail assembly 3. The slide rail assembly 3 includes a first slide rail 31 fixed to the inner side of the flue back plate 12 and a second slide rail 32 fixed to the side of the smoke guide 2.

[0059] A telescopic drive component is also installed on the inner side of the flue back plate 12. The telescopic drive component's telescopic direction is consistent with the translation direction of the smoke guide component 2, and its telescopic end is fixedly connected to the smoke guide component 2.

[0060] Specifically, the slide rail assembly 3 is mainly used to install the smoke guide 2 on the flue assembly 1 and as the structural basis for the translational movement of the smoke guide 2 relative to the flue assembly 1. The slide rail assembly 3 itself does not have power and needs to be further combined with a powered structure to realize the extension and retraction of the smoke guide 2 relative to the flue assembly 1. In this embodiment, a telescopic drive is used as the translational drive mechanism for the smoke guide 2. The fixed end of the telescopic drive is fixed to the inner side of the flue back plate 12, and its telescopic end is fixedly connected to the smoke guide 2. The telescopic drive can specifically adopt an electric cylinder push rod structure. The motor is fixed on the flue back plate 12. By controlling the number of steps of the motor, the extension length of the push rod can be controlled, thereby controlling the extension distance of the smoke guide 2.

[0061] Preferably, the second slide rail 32 is fixed on the cavity wall of the smoke guiding cavity 21 at the position corresponding to the side of the smoke guiding member 2, and the second slide rail 32 is fitted to the outside of the first slide rail 31.

[0062] Specifically, each component of the slide rail assembly 3 corresponds to the interior of the smoke guide 2, while the outer surface of the smoke guide 2 has no other structure. This allows for minimizing the gap between the smoke guide 2 and the flue side plate 13 during retraction, or even allowing for direct contact, thereby improving the structural compactness. Furthermore, the absence of any other structure on the outer surface of the smoke guide 2 enhances the simplicity and aesthetics of both the smoke guide 2 and the smoke guide structure.

[0063] Example 2

[0064] This embodiment is a further improvement on the basis of embodiment 1. Some of the same content can be referred to embodiment 1, and will not be repeated in this embodiment.

[0065] In this embodiment, the front of the flue assembly 1 has a relatively protruding front shell structure 4. The bottom of the front shell structure 4 is higher than the flue opening 11, and an air curtain assembly 5 is installed on the front side of the bottom of the front shell structure 4. The air curtain assembly 5 is used to output airflow downward to form an air curtain 53 that can correspond to the smoke guide 2.

[0066] The air curtain 53, the bottom surface of the front shell structure 4, and the flue assembly 1 form a smoke guiding area 7. The smoke guiding area 7 is used to limit the escape of the smoke rising above the location of the smoke guiding component 2 and to redirect the rising smoke back to the smoke guiding component 2.

[0067] Specifically, as shown in the attached diagram. Figure 1 and Figure 2 As shown, the front of the flue assembly 1 has a relatively protruding front shell structure 4. An air curtain assembly 5 is installed at the very front of the bottom of the front shell structure 4. The air curtain assembly 5 is mainly used to form an air curtain 53 in front of the front of the flue assembly 1. The air curtain 53 can isolate the smoke from the user in front, preventing the smoke from entering the user's operating area. More importantly, the air curtain 53 further restricts the escape of rising smoke. (Refer to the attached diagram.) Figure 2 As can be seen, structurally, the air curtain 53, the bottom surface of the front shell structure 4, and the flue assembly 1 (specifically, the flue 14 panel of the flue assembly 1) can form a smoke guiding zone 7, and the protruding smoke guiding element 2 enters the smoke guiding zone 7 accordingly. (See attached diagram.) Figure 2 As shown, when the smoke guide 2 is extended, a portion of the smoke directly enters the flue 14 through the smoke inlet chamber. After rising a certain distance, a portion of the smoke is guided into the smoke inlet chamber or enters the smoke guide chamber 21 through the smoke guide hole 22 on the bottom surface of the smoke guide 2. Another portion of the smoke continues to rise and enters the smoke guide chamber 21 through the smoke guide hole 22 on the front side of the smoke guide 2 during the rising process. Finally, a portion of the smoke continues to rise and enters the smoke guide area 7.

[0068] Since the smoke guiding zone 7 is a relatively enclosed area, the smoke cannot escape from it. Furthermore, under the influence of the airflow from the air curtain 53, the flow direction of the smoke entering the smoke guiding zone 7 will shift, changing from an upward direction to a direction away from the air curtain 53. Further obstruction and guidance from the bottom surface of the front shell structure 4 will cause it to flow obliquely towards the vicinity of the top surface of the smoke guide 2, where it will be absorbed into the smoke guiding cavity 21 through the smoke guiding holes 22 on the top surface of the smoke guide 2. Therefore, referring to the attached drawings... Figure 2 The flue gas flow path shown in the diagram allows the smoke guide zone 7 to deflect and recirculate the rising flue gas, thereby preventing flue gas from escaping and further absorbing the flue gas.

[0069] Furthermore, to ensure the effective guidance of the flue gas by the air curtain 53, the airflow direction corresponding to the air curtain 53 is diagonally outward from top to bottom, forming an acute angle with the vertical direction, as shown in the attached diagram. Figure 2 As shown.

[0070] Furthermore, as shown in the attached figure Figure 2 and Figure 5 As shown, the air curtain assembly 5 includes a housing and a cross-flow fan blade 51 installed inside the housing. The housing is fixed to the front side of the front housing structure 4 and the bottom of the housing has a strip-shaped air outlet 52 for outputting airflow.

[0071] Furthermore, a smoke concentration sensor 6 is also provided on the flue assembly 1 to sense the smoke concentration in order to control the extension of the smoke guide 2 and its specific extension distance. In this embodiment, the smoke concentration sensor 6 is located on the bottom surface of the front shell structure 4, corresponding to the smoke guide area 7.

[0072] Example 3

[0073] This embodiment is a further improvement based on the above embodiments. Some of the same content can be referred to in Embodiment 1 or Embodiment 2, and will not be repeated in this embodiment.

[0074] In this embodiment, a partition assembly 8 is also provided in the flue 14 of the flue assembly 1. The main structural function of the partition assembly 8 is to divide the flue 14 (mainly the part of the flue 14 near the flue opening 11) into an inner branch 142 located on one side of the flue back plate 12 and an outer branch 141 located on one side of the flue panel 14. The main functional function of the partition assembly 8 and the two branches formed therein is to separate the airflow of smoke entering the flue 14 from the smoke inlet chamber and the airflow of smoke entering the flue 14 from the smoke guide chamber 21 of the smoke guide 2 when the smoke guide 2 is extended (fully extended or partially extended), so as to avoid the two airflows from affecting each other and thus affecting the smoking effect.

[0075] Specifically, as shown in the attached diagram. Figure 6 and Figure 7As shown, the partition assembly 8 generally includes a first fixed plate 81, a second fixed plate 83, and a second movable plate 84 arranged sequentially from top to bottom. The first fixed plate 81 and the second fixed plate 83 are fixed in the flue assembly 1 and are in the same plane, with both fixed plates arranged along the direction of the flue 14. When the smoke guide 2 is retracted, the first fixed plate 81 is outside the smoke guide 2, and the second fixed plate 83 is inside the smoke guide 2, as shown in the attached figure. Figure 7 As shown, there is a gap between the first fixing plate 81 and the second fixing plate 83, which allows the top wall of the smoke guide 2 to pass through when the smoke guide 2 moves horizontally. The two sides of the first fixing plate 81 are fixed to the inner walls of the flue side plates 13 on both sides, and the second fixing plate 83 is fixed by a bracket 121 provided on the flue back plate 12. The top of the second movable plate 84 is hinged to the bottom of the second fixing plate 83, and a torsion spring is provided at the hinge. It is a movable structure that can flip in the vertical plane. Its main purpose is to separate the airflow of flue gas entering the flue 14 from the airflow of flue gas entering the flue 14 from the smoke guide cavity 21 of the smoke guide 2 when the smoke guide 2 extends.

[0076] Refer to the attached diagram. Figure 6 and Figure 7 When the smoke guide 2 is retracted, the limiting block 23 on the inner wall of the smoke guide 2 abuts against the top of the second movable plate 84 near the hinge. At this time, under the pressure of the limiting block 23, the second movable plate 84 overcomes the elastic force of the torsion spring and flips to a vertical state, that is, the second movable plate 84, the first fixed plate 81, and the second fixed plate 83 are in the same plane. At this time, the smoke is mainly absorbed through the smoke inlet chamber, and the airflow direction of the smoke is relatively uniform, so there is no need to divert it. Therefore, since the second movable plate 84, the first fixed plate 81, and the second fixed plate 83 are all parallel to the direction of the flue 14, the inlets of the outer branch 141 and the inner branch 142 are all corresponding to the smoke inlet chamber, so the partition does not affect the smoke from the smoke inlet chamber into the flue 14.

[0077] Refer to the attached diagram. Figure 8 When the smoke guide 2 extends, the direction of the flue gas flow entering the flue 14 from the smoke inlet chamber differs significantly from that of the flue gas flow rising to the smoke guide area 7 and then deflected before entering the flue 14 through the smoke guide 2. One flows obliquely upwards, and the other flows obliquely downwards. Therefore, it is necessary to separate and divert the flow to avoid interference between the airflows and affect their flowability. In this state, due to the extension of the smoke guide 2, the limiting block 23 on the inner wall of the smoke guide 2 separates from the second movable plate 84. At this time, the second movable plate 84 loses its pressure and flips upwards towards the outer branch 141 under the action of the torsion spring. At this time, the second movable plate 84 partially blocks the communication space between the outer branch 141 and the smoke inlet chamber, as shown in the attached figure. Figure 8As shown. At this time, the flue gas flow entering the flue 14 from the smoke inlet chamber is concentrated into the inner branch 142 under the obstruction and guidance of the second movable plate 84, instead of entering the outer branch 141. The flue gas flow entering the flue 14 from the smoke guide area 7 through the smoke guide member 2 enters the smoke guide chamber 21 and then enters the outer branch 141 under the obstruction and guidance of the second fixed plate 83 and the second movable plate 84. Therefore, the isolation and diversion of the two airflows with large differences in flow direction are realized, thereby avoiding mutual interference and conflict.

[0078] Preferably, when the second movable plate 84 is flipped upward to its natural state, the angle between the second movable plate 84 and the second fixed plate 83 is an obtuse angle, that is, the second movable plate 84 is in an inclined state in its natural state, and the inclined surface formed by its own surface in the inclined state improves the flow guiding effect.

[0079] Furthermore, the partition assembly 8 also includes a first movable plate 82, which is hinged below the first fixed plate, corresponding to the gap between the first fixed plate 81 and the second fixed plate 83. When the smoke guide 2 is retracted, the first movable plate 82 can be pushed open by the top wall of the smoke guide 2, thereby opening the gap for the top wall of the smoke guide 2 to pass through; when the smoke guide 2 is extended, the first movable plate 82 flips downward under the action of gravity or torsion springs and other components to close the gap between the first fixed plate 81 and the second fixed plate 83, thereby strengthening the separation effect between the outer branch 141 and the inner branch 142.

[0080] Example 4

[0081] The embodiments of the present invention provide a range hood with the smoke guiding structure of the above embodiments, thereby possessing all the technical effects it possesses.

[0082] Example 5

[0083] An embodiment of the present invention provides a smoke guiding control method, which is applied to the above-mentioned smoke guiding structure, and includes the following steps:

[0084] S100: In response to the comparison between the current oil fume concentration value and the preset concentration range, the range hood is switched to the target level corresponding to the preset concentration range.

[0085] Specifically, based on the sensing results of the smoke concentration sensor, the scale and volume of the smoke can be determined, and then the corresponding smoking level can be matched. In this embodiment, the corresponding smoking machine is set to four levels, namely low, medium, high and super strong.

[0086] S200: In response to the switching of the range hood's power level, the smoke guide at the flue opening is controlled to move outward by a preset distance corresponding to the target power level.

[0087] Specifically, as shown in the attached diagram. Figure 9As shown, based on the detection results of the smoke concentration sensor, if the detected smoke concentration C≤C1, the range hood automatically adjusts to low speed, in which case the smoke guide component does not extend at all; if the detected smoke concentration C1<C<C2, the range hood automatically adjusts to medium speed, in which case the smoke guide component extends 1 / 3 of its distance; if the detected smoke concentration C2≤C<C3, the range hood automatically adjusts to high speed, in which case the smoke guide component extends 2 / 3 of its distance; if the detected smoke concentration C≥C3, the range hood automatically adjusts to high speed, in which case the smoke guide cavity extends fully. When the smoke guide component is partially retracted within the flue assembly, the fumes drawn in from the smoke inlet cavity still need to pass through the upper and lower walls of the smoke guide component, which can act as two layers of oil mesh, improving the grease separation efficiency of the range hood.

[0088] In the description of this invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0089] While the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. A smoke guiding structure, characterized in that, include: A flue assembly having a flue opening at its bottom end, the flue assembly including a flue back plate disposed on the back and extending downward beyond the flue opening; as well as A smoke guide is disposed at the flue opening. The smoke guide is constructed as a porous box-shaped structure with a smoke guiding cavity formed inside and smoke guiding holes opened on each cavity wall. The smoke guide can be translated along the direction of approaching or moving away from the flue back plate, so as to close the flue opening when approaching and abutting the flue back plate, and open the flue opening when moving away from the flue back plate.

2. The smoke guiding structure according to claim 1, characterized in that, The flue assembly also includes two flue side plates disposed on both sides and extending downward beyond the flue opening. When the smoke guide closes the flue opening, the two sides of the smoke guide are directly opposite the two flue side plates.

3. The smoke guiding structure according to claim 1, characterized in that, The side of the smoke guide relative to the back plate of the flue is configured as an open opening communicating with the smoke guide cavity; The opening is closed by the back plate of the flue when the smoke guide abuts against the back plate of the flue, and is connected to the area corresponding to the flue opening when the smoke guide moves away from the back plate of the flue.

4. The smoke guiding structure according to any one of claims 1 to 3, characterized in that, The two sides of the smoke guide are movably connected to the flue back plate via a slide rail assembly. The slide rail assembly includes a first slide rail fixed to the inner side of the flue back plate and a second slide rail fixed to the side of the smoke guide.

5. The smoke guiding structure according to claim 4, characterized in that, The second slide rail is fixed to the cavity wall of the smoke guide cavity at the position corresponding to the side of the smoke guide component, and the second slide rail is fitted on the outside of the first slide rail.

6. The smoke guiding structure according to claim 4, characterized in that, A telescopic drive component is also installed on the inner side of the flue back plate. The telescopic drive component extends in the same direction as the translation of the smoke guide component, and its telescopic end is fixedly connected to the smoke guide component.

7. The smoke guiding structure according to claim 1, characterized in that, The front of the flue assembly has a relatively protruding front shell structure. The bottom of the front shell structure is higher than the flue opening, and an air curtain assembly is installed on the front side of the bottom of the front shell structure. The air curtain assembly is used to output airflow downward to form an air curtain that can correspond to the smoke guide. The air curtain, the bottom surface of the front shell structure, and the flue assembly form a smoke guiding area, which is used to limit the escape of smoke rising above the location of the smoke guide and to redirect the rising smoke back to the smoke guide.

8. The smoke guiding structure according to claim 7, characterized in that, The air curtain assembly includes a housing and cross-flow fan blades installed inside the housing. The housing is fixed to the front side of the front shell structure, and the bottom of the housing has a strip-shaped air outlet for outputting airflow.

9. The smoke guiding structure according to claim 1, characterized in that, The flue assembly is also equipped with a smoke concentration sensor.

10. A range hood, characterized in that, Includes the smoke guiding structure as described in any one of claims 1 to 9.

11. A smoke control method, characterized in that, Applied to the smoke guiding structure as described in any one of claims 1 to 9, the method includes the following steps: In response to the comparison between the current oil fume concentration value and the preset concentration range, the range hood is switched to the target level corresponding to the preset concentration range; In response to the switching of the range hood's power setting, the smoke guide at the flue opening is controlled to move outward by a preset distance corresponding to the target power setting.

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