Range hood

Abstract

This application relates to a range hood, including a main body and two smoke-collecting side panels. The main body has a smoke-collecting surface with an upper smoke inlet and a lower smoke inlet, which are spaced apart in the height direction of the range hood. The two smoke-collecting side panels are movably disposed on the main body and are located on both sides of the smoke-collecting surface in the width direction. The smoke-collecting side panels are configured to be able to rise and fall relative to the main body and, together with the smoke-collecting surface, define a smoke-collecting space. In cooking scenarios with high levels of oil fumes, such as stir-frying, the range hood may experience some oil fumes escaping due to incomplete extraction at the lower smoke inlet. However, these escaping fumes will continue to rise under the obstruction of the smoke-collecting side panels and will eventually be drawn into the duct by the upper smoke inlet, thereby reducing the oil fume escape rate. Furthermore, the smoke-collecting side panels can be adjusted in height to select a suitable working height.

Description

Technical Field

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

[0002] In related technologies, some range hoods are prone to smoke leakage during use, causing cooking fumes to fill the entire kitchen, seriously affecting the user's physical and mental health and experience. In order to improve the smoke extraction effect of range hoods, some range hoods on the market have installed smoke baffles below or inside the smoke collection hood. However, the smoke baffles are basically one or two plate-like structures that cover the air inlet of the smoke collection hood. When the fan is turned on, the rising smoke will hit the lower surface of the smoke baffle and flow to the side under the guidance of the lower surface of the smoke baffle, so that it can enter the smoke collection hood from the side of the smoke baffle.

[0003] However, because the above-mentioned smoke baffle structure adopts a simple plate-like structure, and only the lower surface guides the smoke, and the lower surface is flat and smooth, the smoke flows faster when passing over the lower surface of the smoke baffle. As a result, some smoke can easily escape from the edge of the smoke baffle when flowing to the side and cannot enter the smoke collection hood, thereby reducing the smoke extraction efficiency of the range hood and reducing the user experience. Utility Model Content

[0004] Therefore, it is necessary to provide a range hood that can reduce the rate of oil fume escape and improve the efficiency of oil fume extraction in order to address the above problems.

[0005] A range hood, the range hood comprising:

[0006] The main body has a smoke-absorbing surface, and the smoke-absorbing surface has an upper smoke-absorbing inlet and a lower smoke-absorbing inlet, the upper smoke-absorbing inlet and the lower smoke-absorbing inlet being spaced apart in the height direction of the range hood; and

[0007] Two smoke-collecting side plates are movably disposed on the main body and are respectively located on both sides of the smoke-collecting surface in the width direction; the smoke-collecting side plates are configured to be able to rise and fall relative to the main body and to jointly define and form a smoke-collecting space with the smoke-collecting surface.

[0008] In cooking scenarios involving heavy stir-frying or similar activities, the aforementioned range hood may experience some escaping smoke due to the rapid rise of the fumes and incomplete removal of the lower intake vent. However, this escaping smoke, blocked by the side smoke-collecting panels, continues to rise and is eventually drawn into the duct by the upper intake vent, thus reducing the smoke escape rate. Furthermore, the smoke-collecting panels are height-adjustable to suit specific operational needs.

[0009] In one embodiment, the smoke-collecting side panel is configured to have a retracted position and a working position, and can switch between the retracted position and the working position by lifting and lowering relative to the main body;

[0010] In the retracted position, the smoke-gathering side panel is completely retracted into the main body; in the working position, the smoke-gathering side panel and the smoking surface together define a smoke-gathering space.

[0011] In this way, when the range hood is not in use, the smoke-collecting side panel can be completely retracted into the main body, reducing the space occupied by the range hood.

[0012] In one embodiment, in the height direction of the range hood, the smoke-collecting side panel is configured to have at least two working positions and can be switched between the working positions by lifting and lowering relative to the main body.

[0013] In this way, even when in operation, the height of the smoke collection side panel can be adjusted to suit different needs.

[0014] In one embodiment, the range hood further includes a lifting driver, which is drively connected to the smoke-collecting side panel and configured to drive the smoke-collecting side panel to rise or fall relative to the main body.

[0015] In this way, the smoke collection side panel can be automatically raised and lowered under the drive of the lifting driver, without the need for manual operation by the user.

[0016] In one embodiment, the range hood further includes an oil fume concentration detection device, which is disposed on the main body and electrically connected to the lifting drive.

[0017] In this way, the fume concentration detector can detect the concentration of oil fumes to reflect the current operating conditions. Based on the detection results of the fume concentration detector, the lifting drive can control the fume collection side plate to rise and fall accordingly, and can rise and fall to a specific height to meet the current needs of fume extraction.

[0018] In one embodiment, the upper smoke inlet includes at least two sub-smoke inlets, all of which are arranged sequentially along the longitudinal direction of the upper smoke inlet.

[0019] Therefore, designing the upper smoke inlet as a combination of multiple sub-smoke inlets can increase the airflow velocity, allowing the fumes to be quickly drawn away.

[0020] In one embodiment, the range hood further includes an upper opening and closing smoke plate, which is disposed on the main body and located at the upper smoke inlet, and is used to open and close the upper smoke inlet;

[0021] And / or, the range hood further includes a lower opening and closing smoke plate, which is disposed on the main body and located at the lower smoke inlet, and is used to open and close the lower smoke inlet.

[0022] In this way, the top-opening and closing smoke panel can cover the upper smoke inlet when the range hood is not working, protecting it and reducing the occurrence of problems such as backflow of fumes. Similarly, the bottom-opening and closing smoke panel can cover the lower smoke inlet when the range hood is not working, protecting it and reducing the occurrence of problems such as backflow of fumes.

[0023] In one embodiment, the range hood further includes an upper-opening and closing smoke plate, which is disposed on the main body and located at the upper smoke inlet;

[0024] The upper opening and closing smoke plate is configured to be able to flip relative to the main body, and to open the upper smoke opening by flipping it away from the upper smoke opening at its lower end, and to close the upper smoke opening by flipping it closer to the upper smoke opening at its lower end.

[0025] In this way, the top-opening smoke baffle can not only open the top smoke inlet outwards, but also act as a smoke-collecting baffle at the top smoke inlet to block the rising oil fumes and improve the efficiency of smoke extraction.

[0026] In one embodiment, the range hood further includes a downward-opening and closing smoke plate, which is disposed on the main body and located at the downward smoke inlet;

[0027] The lower opening and closing smoke plate is configured to be able to flip relative to the main body, and to open the upper smoke opening by flipping it inward from its upper end, and to close the upper smoke opening by flipping it outward from its upper end.

[0028] In this way, the downward-opening smoke baffle, while folding inward to open the downward smoke inlet, can also act as a guide plate within the downward smoke inlet, directing the fumes into the air duct. Furthermore, the inward-folding design of the downward-opening smoke baffle will not interfere with external cooking appliances.

[0029] In one embodiment, the smoke extraction surface includes an upper smoke extraction surface and a lower smoke extraction surface. In the height direction of the range hood, the upper smoke extraction surface is located above the lower smoke extraction surface, the upper smoke extraction port is located on the upper smoke extraction surface, and the lower smoke extraction port is located on the lower smoke extraction surface.

[0030] Both the upper smoking surface and the lower smoking surface are inclined downwards, and the angle between the upper smoking surface and the horizontal plane is smaller than the angle between the lower smoking surface and the horizontal plane.

[0031] In this way, the fumes escaping from the lower smoke inlet can be more fully drawn into the upper smoke inlet located on the upper smoke surface by the obstruction of the upper smoke surface and the gathering of the left and right smoke-gathering side plates, thereby reducing the overall fume escape rate of the range hood. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of a range hood in one embodiment of this application, when its smoke-collecting side plate is in the working position and both the upper and lower smoke inlets are open.

[0034] Figure 2 for Figure 1 The side view of the hidden part of the range hood shown.

[0035] Figure 3 for Figure 2 The diagram shows a partial structural schematic of a range hood.

[0036] Figure 4 for Figure 1 The diagram shows the structure of a range hood when its smoke-collecting side panel is in the retracted position and both the upper and lower smoke inlets are closed.

[0037] Figure 5 This is a flowchart illustrating the control method of a range hood in one embodiment of this application.

[0038] Explanation of reference numerals in the attached drawings: 100, Range hood; 10, Main body; 11, Smoke extraction surface; 111, Upper smoke extraction port; 112, Lower smoke extraction port; 113, Upper smoke extraction surface; 114, Lower smoke extraction surface; 30, Smoke collection side panel; 31, Smoke collection space; 51, Upper opening and closing smoke collection plate; 53, Lower opening and closing smoke collection plate; 70, Lifting driver; 71, Motor mounting bracket. Detailed Implementation

[0039] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0040] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 application.

[0041] Furthermore, where the term "and / or" appears, it merely describes the relationship between related objects and indicates that three relationships can exist. For example, A and / or B can represent the relationship between A and B: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this document generally indicates an "or" relationship between the related objects before and after it. Where the terms "first" and "second" appear, these terms are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature specified with "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, four, five, etc., unless otherwise explicitly specified.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0044] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0045] Please see Figure 1 and Figure 3 An embodiment of this application provides a range hood 100, including a main body 10 and two smoke-collecting side panels 30. The main body 10 has a smoke-collecting surface 11, and the smoke-collecting surface 11 has an upper smoke-collecting inlet 111 and a lower smoke-collecting inlet 112. The upper smoke-collecting inlet 111 and the lower smoke-collecting inlet 112 are aligned in the height direction of the range hood 100 (e.g., ...). Figure 2 The two smoke-collecting side plates 30 are movably mounted on the main body 10 and are respectively located on the smoke-collecting surface 11 in the width direction (as shown in the Z direction). Figure 1 On both sides (in the X direction shown). The smoke-collecting side plate 30 is configured to be able to rise and fall relative to the main body 10, and together with the smoke-collecting surface 11, it can define and form a smoke-collecting space 31.

[0046] To achieve its normal function, the main body 10 includes a conventional outer shell and air ducts, fans, etc., disposed within the outer shell, which will not be described in detail here. The smoke extraction surface 11 of the main body 10 is at least partially inclined downward so that the rising fumes can flow along the smoke extraction surface 11 and be sucked in by the smoke extraction port on the smoke extraction surface 11.

[0047] The smoke inlet includes an upper smoke inlet 111 and a lower smoke inlet 112, which are distributed vertically. The lower smoke inlet 112 is located at the bottom, closer to the cookware, and plays the main role in smoke extraction. For rising smoke, if it is not drawn in by the lower smoke inlet 112, it can still flow upward along the smoke surface 11 and be drawn in by the upper smoke inlet 111.

[0048] Two smoke-collecting side panels 30 are located on the left and right sides of the main body 10. During use, the smoke-collecting side panels 30 can rise and fall with their own weight, changing their distance relative to the cooktop, thereby altering the suction power of the range hood 100 on the cooktop. Furthermore, the rising and falling function of the smoke-collecting side panels 30 can also be used to adapt to the installation height of the range hood 100, improving its adaptability. Understandably, the rising and falling of the smoke-collecting side panels 30 can be automatic or manual, and no specific limitation is made here.

[0049] The two smoke-collecting side plates 30, together with the smoke-collecting surface 11, can enclose and form a smoke-collecting space 31. In other words, the smoke-collecting side plates 30 at least partially protrude from the smoke-collecting surface 11 or at least partially protrude from the smoke-collecting surface 11 by raising and lowering, blocking the oil fumes on both sides of the smoke-collecting surface 11, thereby achieving the effect of gathering the oil fumes as much as possible in the smoke-collecting space 31. Understandably, the two smoke-collecting side plates 30, apart from being respectively set on the left and right sides of the main body 10, can have roughly the same features.

[0050] In cooking scenarios involving heavy oil fumes, such as stir-frying, the aforementioned range hood 100 may experience some escaping due to the rapid rise of the fumes and incomplete extraction by the lower intake vent 112. However, this escaping fumes, which are not yet drawn into the lower intake vent 112, will continue to rise under the obstruction of the side smoke-collecting plates 30 on both sides, and will eventually be drawn into the duct by the upper intake vent 111, thereby reducing the rate of fume escape. Furthermore, the smoke-collecting plates 30 are adjustable in height to suit their operational needs, allowing them to operate at a suitable height based on the amount of oil fumes.

[0051] Furthermore, the upper smoke inlet 111 includes at least two sub-smoke inlets, all of which are arranged sequentially along the longitudinal direction of the upper smoke inlet 111.

[0052] The longitudinal direction of the upper smoke inlet 111 can correspond to the width direction of the range hood 100, that is, the width direction of the smoke extraction surface 11. Specifically, the sub-smoke inlet can be an elongated hole, the length of which can be consistent with the longitudinal direction of the upper smoke inlet 111.

[0053] Thus, designing the upper smoke inlet 111 as a combination of multiple sub-smoke inlets can increase the airflow velocity, allowing the fumes to be quickly drawn away.

[0054] In some embodiments, the smoke extraction surface 11 includes an upper smoke extraction surface 113 and a lower smoke extraction surface 114. In the height direction of the range hood 100, the upper smoke extraction surface 113 is located above the lower smoke extraction surface 114. The upper smoke extraction port 111 is located on the upper smoke extraction surface 113, and the lower smoke extraction port 112 is located on the lower smoke extraction surface 114. Both the upper smoke extraction surface 113 and the lower smoke extraction surface 114 are inclined downwards, and the angle between the upper smoke extraction surface 113 and the horizontal plane is smaller than the angle between the lower smoke extraction surface 114 and the horizontal plane.

[0055] Understandably, the upper smoking surface 113 can be connected to the lower smoking surface 114, and both can be planar, with the upper smoking surface 113 being more horizontal than the lower smoking surface 114.

[0056] In this way, the fumes escaping from the lower smoke inlet 112 can be more fully sucked into the upper smoke inlet 111 located on the upper smoke surface 113 by the obstruction of the upper smoke surface 113 and the gathering of the left and right smoke gathering side plates 30, thereby reducing the overall fume escape rate of the range hood 100.

[0057] Please refer to the following: Figure 4 In some embodiments, the range hood 100 further includes an upper opening and closing smoke plate 51, which is disposed on the main body 10 and located at the upper smoke inlet 111, and is used to open and close the upper smoke inlet 111. When the upper smoke inlet 111 is closed, the upper opening and closing smoke plate 51 blocks the upper smoke inlet 111.

[0058] In this way, the top-opening and closing smoke plate 51 can block the upper smoke inlet 111 when the range hood 100 is not working, protect the upper smoke inlet 111, and reduce the occurrence of problems such as backflow of oil fumes.

[0059] Furthermore, the upper opening and closing smoke plate 51 is configured to be able to flip relative to the main body 10, and to open the upper smoke opening 111 by flipping it away from the upper smoke opening 111 at its lower end, and to close the upper smoke opening 111 by flipping it closer to the upper smoke opening 111 at its lower end.

[0060] The lower end of the top-opening and closing smoke plate 51 refers to the lower end of the two opposite ends in the height direction of the range hood 100, and the upper end is the upper end.

[0061] The upper opening and closing smoke plate 51 opens and closes the upper smoke inlet 111 by flipping relative to the main body 10. The upper opening and closing smoke plate 51 flips outward from the lower end of the upper smoke inlet 111 to open the upper smoke inlet 111, and flips inward from the upper smoke inlet 111 to close the upper smoke inlet 111.

[0062] The upper end of the upper opening and closing smoke plate 51 is closer to the flipping axis than the lower end of the upper opening and closing smoke plate 51. Therefore, when it is flipped, the lower end moves a greater distance, so that the upper opening and closing smoke plate 51 presents a form in which the lower end flips.

[0063] In this way, while the upper smoke-collecting plate 51 flips outward to open the upper smoke-collecting port 111, it can also act as a smoke-collecting baffle at the upper smoke-collecting port 111 to block the rising oil fumes and improve the efficiency of smoke extraction.

[0064] In some embodiments, the range hood 100 further includes a lower opening and closing smoke plate 53, which is disposed on the main body 10 and located at the lower smoke inlet 112, and is used to open and close the lower smoke inlet 112. When the lower smoke inlet 112 is closed, the upper opening and closing smoke plate 51 blocks the lower smoke inlet 112.

[0065] In this way, the downward-opening and closing smoke plate 53 can block the lower smoke inlet 112 when the range hood 100 is not working, protect the lower smoke inlet 112, and reduce the occurrence of problems such as backflow of oil fumes.

[0066] Furthermore, the lower opening and closing smoke plate 53 is configured to be able to flip relative to the main body 10, and to open the upper smoke port 111 by flipping it in the direction of upward smoke port 111 from its upper end, and to close the upper smoke port 111 by flipping it in the direction of upward smoke port 111 from its upper end.

[0067] The upper end of the downward-opening and closing smoke plate 53 refers to the upper end of the two opposite ends in the height direction of the range hood 100, and the lower end is the lower end.

[0068] The lower opening and closing smoke plate 53 flips relative to the main body 10 to open and close the lower smoke inlet 112. The lower opening and closing smoke plate 53 flips in the direction of the upper end towards the lower smoke inlet 112 to open the lower smoke inlet 112, and flips in the direction of the lower smoke inlet 112 towards the outside to close the upper smoke inlet 111.

[0069] The lower end of the lower opening and closing smoke plate 53 is closer to the flipping axis than the upper end of the lower opening and closing smoke plate 53. Therefore, when it flips, the upper end moves a greater distance, so that the lower opening and closing smoke plate 53 presents a flipping form at the upper end.

[0070] Thus, while the downward-opening smoke baffle 53 flips inward to open the downward smoke inlet 112, it can also act as a guide plate within the downward smoke inlet 112 to guide the fumes into the air duct. In addition, the inward-opening downward-opening smoke baffle 53 will not interfere with external cooking appliances.

[0071] In some embodiments, the smoke-collecting side panel 30 is configured to have a retracted position and a working position, and can switch between the retracted position and the working position by raising and lowering relative to the main body 10.

[0072] In the retracted position, the smoke-collecting side panel 30 is completely retracted into the main body 10; in the working position, the smoke-collecting side panel 30 and the smoke-collecting surface 11 together define and form the smoke-collecting space 31.

[0073] In this way, when the range hood 100 is not working, the smoke-collecting side panel 30 can be completely stored inside the main body 10, reducing the space occupied by the range hood 100.

[0074] In some embodiments, the smoke-collecting side panel 30 is configured to have at least two working positions in the height direction of the range hood 100, and can switch between working positions by lifting and lowering relative to the main body 10.

[0075] Of all the working positions, the lowest one is the lowest working position. The travel distance of the smoke-collecting side plate 30 from the retracted position to the lowest working position is its maximum descent travel distance.

[0076] When the smoke collection side plate 30 is in the retracted position and descends 100% of its maximum travel distance, it is in its lowest working position. Except for the lowest working position, the descent distance from the retracted position to any of the other working positions is less than the maximum travel distance.

[0077] Thus, even when in operation, the height of the smoke collection side plate 30 can be adjusted to suit different needs.

[0078] In some embodiments, the range hood 100 further includes a lifting driver 70, which is connected to the smoke-collecting side panel 30 and configured to drive the smoke-collecting side panel 30 to rise and fall relative to the main body 10. Specifically, the lifting driver 70 is connected to all the smoke-collecting side panels 30, and the lifting driver 70 can be, but is not limited to, a lifting push rod motor.

[0079] In this way, the smoke collection side panel 30 can be automatically raised and lowered under the drive of the lifting driver 70, without the need for manual operation by the user.

[0080] Furthermore, the range hood 100 may also include a motor mounting bracket 71, through which the lifting drive 70 is mounted on the main body 10.

[0081] Furthermore, the range hood 100 may also include a lifting guide rail, which is configured to be located on the body 10 along the height direction of the body 10 in the longitudinal direction, and the smoke-collecting side plate 30 is movably located on the lifting guide rail.

[0082] In some embodiments, the range hood 100 further includes a fume concentration detection element, which is disposed on the main body 10 and electrically connected to the lifting drive 70.

[0083] Understandably, the fume concentration detector is used to detect the fume concentration at its location. Specifically, the fume concentration detector can be located on the smoke extraction surface 11 and is used to detect the fume concentration within the smoke collection space 31. The fume concentration detector is electrically connected to the lifting drive 70, and its detection result in the form of an electrical signal can be processed or directly transmitted to the lifting drive 70, enabling it to operate based on the detection result.

[0084] In this way, the fume concentration detector can detect the concentration of oil fumes to reflect the current working conditions. Based on the detection results of the fume concentration detector, the lifting driver 70 can control the fume collection side plate 30 to rise and fall accordingly, and can rise and fall to a specific height to meet the current needs of fume extraction.

[0085] Specifically, the lifting driver 70 can adjust the lifting height of the smoke-collecting side plate 30 according to the different concentrations of oil fumes. For example: when c > c2, the left and right smoke-collecting side plates 30 are driven to descend by the maximum stroke distance; when the oil fume concentration is within a certain range; when c1 < c < c2, the left and right smoke-collecting side plates 30 are driven to descend by 70% of the maximum stroke distance; when c < c1, the left and right smoke-collecting side plates 30 are driven to descend by 30% of the maximum stroke distance.

[0086] Where c represents the oil fume concentration detected by the oil fume concentration detector, c2 is the second set threshold, and c1 is the first set threshold. When c > c2, it indicates a high oil fume concentration, which may represent a stir-frying situation, requiring the smoke-collecting side plate 30 to be lowered to its lowest position. When c1 > c4, it indicates a low oil fume concentration, and the smoke-collecting side plate 30 does not need to be fully lowered and can remain at a relatively high height. When c2 > c > c1, it indicates a manageable oil fume concentration, and the smoke-collecting side plate 30 can be lowered to a height between the corresponding heights of the first two situations.

[0087] Please refer to the following: Figure 5 In some embodiments, the control method for the range hood 100 may include: detecting the concentration of cooking fumes; and controlling the raising and lowering of the smoke-collecting side panel 30 based on the concentration of cooking fumes.

[0088] Specifically, controlling the raising and lowering of the fume collection side panel 30 based on the fume concentration involves comparing the fume concentration with a set value to obtain a ratio. When the ratio is greater than or equal to 100%, the panel is controlled to descend to 100% of its maximum travel distance. When the ratio is less than 100%, the panel is controlled to descend to the corresponding ratio of the maximum travel distance; for example, when the ratio is 60%, the panel is controlled to descend to 60% of the maximum travel distance; when the ratio is 30%, the panel is controlled to descend to 30% of the maximum travel distance.

[0089] The aforementioned range hood 100 has two smoke inlets for drawing in cooking fumes: an upper smoke inlet 111 and a lower smoke inlet 112, both equipped with smoke baffles. The upper smoke inlet 111 consists of multiple uniformly sized sub-smoke inlets, while the lower smoke inlet 112 is a long, narrow smoke inlet. Furthermore, the range hood 100 has liftable smoke-gathering side panels 30 on both sides of the main body 10. Driven by a lifting push rod motor, these panels can move up and down to prevent cooking fumes from escaping to the sides. The height of the smoke-gathering side panels 30 can be adjusted according to the concentration of cooking fumes.

[0090] Specifically, when cooking begins, the left and right smoke-gathering side panels 30 descend, and the upper and lower smoke-gathering panels 51 and 53 open, exposing the upper smoke inlet 111 and lower smoke inlet 112. Most of the cooking fumes are quickly drawn into the duct by the elongated lower smoke inlet 112. Fumes that are not drawn in during the rising process continue to rise due to the obstruction of the descending smoke-gathering side panels 30 and are then drawn into the duct by the evenly distributed, uniformly sized upper smoke inlets 111, thus preventing fumes from escaping. The lifting smoke-gathering side panels 30 can move up and down under the drive of a lifting push rod motor, which is fixed to the motor mounting bracket 71. When cooking ends, the lifting left and right smoke-gathering side panels 30 retract, and the upper and lower smoke-gathering panels 51 and 53 close.

[0091] Furthermore, the concentration of cooking fumes varies depending on the cooking conditions during actual cooking. For example, during stir-frying, the concentration of cooking fumes is very high, requiring rapid removal to prevent unpleasant odors from escaping into the kitchen. Therefore, the lifting drive 70 adjusts the lifting height of the smoke-collecting side plates 30 according to the concentration of cooking fumes. When the concentration of cooking fumes is high (c > c2), the left and right smoke-collecting side plates 30 are driven to descend the maximum travel distance. When the concentration of cooking fumes is within a certain range (c1 < c < c2), the left and right smoke-collecting side plates 30 are driven to descend 70% of the maximum travel distance. When the concentration of cooking fumes is below a certain value (c < c1), the left and right smoke-collecting side plates 30 are driven to descend 30% of the maximum travel distance.

[0092] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0093] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A range hood, characterized in that, The range hood includes: The main body (10) has a smoke-absorbing surface (11), and the smoke-absorbing surface (11) has an upper smoke-absorbing port (111) and a lower smoke-absorbing port (112), wherein the upper smoke-absorbing port (111) and the lower smoke-absorbing port (112) are spaced apart in the height direction of the range hood; and Two smoke-collecting side plates (30) are movably disposed on the main body (10) and are respectively located on both sides of the smoke-collecting surface (11) in the width direction; the smoke-collecting side plates (30) are configured to be able to rise and fall relative to the main body (10) and to jointly define and form a smoke-collecting space (31) with the smoke-collecting surface (11).

2. The range hood according to claim 1, characterized in that, The smoke-collecting side panel (30) is configured to have a retracted position and a working position, and can be switched between the retracted position and the working position by raising and lowering relative to the main body (10); In the retracted position, the smoke-collecting side panel (30) is completely retracted into the main body (10); in the working position, the smoke-collecting side panel (30) and the smoking surface (11) together define and form a smoke-collecting space (31).

3. The range hood according to claim 1, characterized in that, In the height direction of the range hood, the smoke-collecting side plate (30) is configured to have at least two working positions and can be switched between the working positions by lifting and lowering relative to the main body (10).

4. The range hood according to claim 3, characterized in that, The range hood also includes a lifting driver (70), which is connected to the smoke-collecting side plate (30) and configured to drive the smoke-collecting side plate (30) to rise or fall relative to the main body (10).

5. The range hood according to claim 4, characterized in that, The range hood also includes an oil fume concentration detection device, which is located on the main body (10) and electrically connected to the lifting drive (70).

6. The range hood according to claim 1, characterized in that, The upper smoking port (111) includes at least two sub-smoking ports, and all of the sub-smoking ports are arranged sequentially along the longitudinal direction of the upper smoking port (111).

7. The range hood according to any one of claims 1-6, characterized in that, The range hood also includes an upper opening and closing smoke plate (51), which is provided on the main body (10) and located at the upper smoke inlet (111), and is used to open and close the upper smoke inlet (111). And / or, the range hood further includes a lower opening and closing smoke plate (53), which is disposed on the main body (10) and located at the lower smoke inlet (112), and is used to open and close the lower smoke inlet (112).

8. The range hood according to any one of claims 1-6, characterized in that, The range hood also includes an upper opening and closing smoke plate (51), which is provided on the main body (10) and located at the upper smoke inlet (111); The upper opening and closing smoke plate (51) is configured to be able to flip relative to the main body (10), and to open the upper smoke port (111) by flipping it away from the upper smoke port (111) at its lower end, and to close the upper smoke port (111) by flipping it closer to the upper smoke port (111) at its lower end.

9. The range hood according to any one of claims 1-6, characterized in that, The range hood also includes a lower opening and closing smoke plate (53), which is provided on the main body (10) and located at the lower smoke inlet (112); The lower opening and closing smoke plate (53) is configured to be able to flip relative to the main body (10), and to open the upper smoke port (111) by flipping it inward along its upper end, and to close the upper smoke port (111) by flipping it outward along its upper end.

10. The range hood according to any one of claims 1-6, characterized in that, The smoke extraction surface (11) includes an upper smoke extraction surface (113) and a lower smoke extraction surface (114). In the height direction of the range hood, the upper smoke extraction surface (113) is located above the lower smoke extraction surface (114). The upper smoke extraction port (111) is located on the upper smoke extraction surface (113), and the lower smoke extraction port (112) is located on the lower smoke extraction surface (114). Both the upper smoking surface (113) and the lower smoking surface (114) are inclined downwards, and the angle between the upper smoking surface (113) and the horizontal plane is smaller than the angle between the lower smoking surface (114) and the horizontal plane.

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