Range hood and damper control method

Abstract

The present application relates to a kind of range hood and smoke baffle control method, which can realize more accurate and efficient oil fume suction effect while avoiding the problem of oil fume escape. The range hood comprises: a range hood body, including a fan system and a smoke collecting chamber in communication with the fan system and having a transverse smoke inlet; a guide assembly, including a first guide rod fixed to the smoke collecting chamber and extending along the transverse smoke inlet, and a first slider slidably disposed on the first guide rod; a smoke baffle, fixedly connected to the first slider and located above the transverse smoke inlet; and a drive assembly, including a first drive mechanism drivingly connected to the first slider; when the first drive mechanism drives the first slider to slide along the first guide rod, the smoke baffle is driven by the first slider to move transversely relative to the transverse smoke inlet, so that the central part of the smoke baffle can move to different parts of the transverse smoke inlet during the operation of the range hood.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of range hood, in particular to a range hood and a control method of a smoke baffle. BACKGROUND

[0002] With the improvement of people's living quality, the range hood has become one of the indispensable kitchen household appliances in modern families. It is usually installed above the kitchen stove and can suck the oil fume generated during cooking, thereby purifying the kitchen environment and improving the comfort of people during cooking.

[0003] In order to expand the smoke collection range, the existing range hood usually uses a smoke baffle to achieve the expansion of the smoke collection area. At present, there are mainly two kinds of smoke baffles for range hoods on the market: one is a fixed smoke baffle, which is fixed above the smoke inlet of the smoke collecting chamber; the other is a flip type smoke baffle, which is reversibly arranged above the smoke inlet of the smoke collecting chamber, so as to open or close the smoke inlet by flipping.

[0004] However, both of the two smoke baffles are fixed during the operation of the range hood, that is, both of the two smoke baffles will not move again during the operation of the range hood; but the state of the oil fume at the smoke inlet is constantly changing during the operation of the range hood. Therefore, both of the two smoke baffles cannot achieve more accurate and efficient smoke suction effect, and are prone to cause oil fume escape. SUMMARY

[0005] In view of the problem that the existing range hood cannot achieve more accurate and efficient smoke suction effect and is prone to cause oil fume escape because the smoke baffle does not move again during the operation of the range hood and the state of the oil fume at the smoke inlet is constantly changing, the present application provides a range hood and a control method of a smoke baffle, which can achieve more accurate and efficient smoke suction effect and avoid the problem of oil fume escape.

[0006] In order to achieve the above at least one advantage or other advantages and purposes of the present application, the present application provides a range hood, comprising:

[0007] a range hood body comprising a fan system and a smoke collecting chamber in communication with the fan system and provided with a transverse smoke inlet;

[0008] a guide assembly comprising a first guide rod fixed to the smoke collecting chamber and extending along the transverse smoke inlet, and a first sliding block slidably arranged on the first guide rod;

[0009] a smoke baffle fixedly connected to the first sliding block and located above the transverse smoke inlet; and

[0010] The driving assembly comprises a first driving mechanism connected with the first sliding block; when the first driving mechanism drives the first sliding block to slide along the first guide rod, the smoke baffle is driven by the first sliding block to move transversely relative to the transverse smoke inlet, so that the central part of the smoke baffle can move to different parts of the transverse smoke inlet during operation of the range hood.

[0011] According to one embodiment of the present application, the range hood body further comprises a sensor assembly fixedly arranged in the smoke collecting cavity and adjacent to the transverse smoke inlet, and a control board communicatively connected with the sensor assembly and the driving assembly; the sensor assembly is configured to detect the oil fume concentration distribution at the transverse smoke inlet to determine the position of the highest oil fume concentration of the transverse smoke inlet; and the control board is configured to control the driving assembly to drive the smoke baffle to move transversely based on the detection result of the sensor assembly.

[0012] According to one embodiment of the present application, the sensor assembly comprises a visual sensor arranged below the transverse smoke inlet and a plurality of oil fume sensors arranged along the extension direction of the transverse smoke inlet and within the field of view of the visual sensor.

[0013] According to one embodiment of the present application, the first driving mechanism comprises a first rotary motor mounted in the smoke collecting cavity and a first lead screw connected with the output shaft of the first rotary motor and threadedly connected with the first sliding block.

[0014] According to one embodiment of the present application, the range hood further comprises a first reel rotatably arranged in the smoke collecting cavity and located at the left end of the transverse smoke inlet, a first winding plate having one end wound around the first reel, a second reel rotatably arranged in the smoke collecting cavity and located at the right end of the transverse smoke inlet, and a second winding plate having one end wound around the second reel; the driving assembly comprises a second driving mechanism connected with the other end of the first winding plate and a third driving mechanism connected with the other end of the second winding plate.

[0015] According to one embodiment of the present application, the second driving mechanism comprises a second rotary motor mounted in the smoke collecting cavity, a second lead screw connected with the output shaft of the second rotary motor and extending along the transverse smoke inlet, and a first screw block threadedly connected with the second lead screw and fixedly connected with the other end of the first winding plate; and the third driving mechanism comprises a third rotary motor mounted in the smoke collecting cavity, a third lead screw connected with the output shaft of the third rotary motor and extending along the transverse smoke inlet, and a second screw block threadedly connected with the third lead screw and fixedly connected with the other end of the second winding plate.

[0016] According to one embodiment of the present application, the second screw rod is parallel to the third screw rod; the second screw rod has a left screw rod segment threadedly connected with the first screw block and a right screw rod segment slidingly connected with the second screw block; and the third screw rod has a left screw rod segment slidingly connected with the first screw block and a right screw rod segment threadedly connected with the second screw block.

[0017] According to one embodiment of the present application, the guide assembly further comprises a second guide rod fixedly arranged in the smoke collecting cavity and extending along the lateral smoke inlet, a second sliding block slidingly arranged in the second guide rod and fixedly connected with the other end of the first rolling plate, and a third sliding block slidingly arranged in the second guide rod and fixedly connected with the other end of the second rolling plate.

[0018] According to another aspect of the present application, the present application further provides a smoke baffle control method, comprising the steps of:

[0019] acquiring, by the sensor assembly, the oil fume concentration distribution in a predetermined time period to obtain the highest oil fume concentration position of the lateral smoke inlet in the predetermined time period; and

[0020] controlling the first driving mechanism of the driving assembly to work to drive the smoke baffle to move laterally relative to the lateral smoke inlet so that the central part of the smoke baffle moves to a position corresponding to the highest oil fume concentration position.

[0021] According to one embodiment of the present application, the step of acquiring, by the sensor assembly, the oil fume concentration distribution in a predetermined time period to obtain the highest oil fume concentration position of the lateral smoke inlet in the predetermined time period comprises the steps of:

[0022] acquiring, by the sensor assembly, the oil fume concentration distribution at different time points in a predetermined time period;

[0023] analyzing the oil fume concentration distribution at each time point in the predetermined time period to obtain the instantaneous highest oil fume concentration position of the lateral smoke inlet at the corresponding time point; and

[0024] sorting the plurality of instantaneous highest oil fume concentration positions in the predetermined time period and taking the median to obtain the highest oil fume concentration position of the lateral smoke inlet in the predetermined time period.

[0025] According to one embodiment of the present application, before the step of acquiring, by the sensor assembly, the oil fume concentration distribution in a predetermined time period to obtain the highest oil fume concentration position of the lateral smoke inlet in the predetermined time period, the present application further comprises the step of:

[0026] when the gear of the range hood is started, determining whether the intelligent mode is started: if yes, acquiring the current maximum oil fume concentration and the current initial air volume; if no, keeping the fan system working normally; and

[0027] determining whether the current oil fume maximum concentration is greater than a first preset oil fume concentration threshold value; if yes, performing the step of obtaining the oil fume concentration distribution within a predetermined time period via the sensor assembly to obtain the highest oil fume concentration position of the lateral oil inlet within the predetermined time period; if no, returning to the step of determining whether the intelligent mode is started.

[0028] According to an embodiment of the present application, after the step of operating the first driving mechanism of the driving assembly to drive the smoke baffle to move laterally relative to the lateral oil inlet so that the center part of the smoke baffle moves to a position corresponding to the highest oil fume concentration position, the method further comprises the steps of:

[0029] operating the second driving mechanism or the third driving mechanism of the driving assembly to drive the first rolling plate or the second rolling plate to spread along the lateral movement direction of the smoke baffle.

[0030] According to an embodiment of the present application, the step of operating the second driving mechanism or the third driving mechanism of the driving assembly to drive the first rolling plate or the second rolling plate to spread along the lateral movement direction of the smoke baffle comprises the steps of:

[0031] obtaining the farthest oil fume concentration collected via the oil fume sensor farthest from the highest oil fume concentration position;

[0032] determining whether the farthest oil fume concentration is less than or equal to a second preset oil fume concentration threshold value;

[0033] in response to the farthest oil fume concentration being less than or equal to the second preset oil fume concentration threshold value, driving the rolling plate far from the highest oil fume concentration position to spread laterally, and making the spread length equal to the lateral movement distance of the smoke baffle; and

[0034] in response to the farthest oil fume concentration being greater than the second preset oil fume concentration threshold value, driving the rolling plate far from the highest oil fume concentration position to spread laterally, and making the spread length equal to N times the lateral movement distance of the smoke baffle, where N is equal to the ratio between the second preset oil fume concentration threshold value and the farthest oil fume concentration.

[0035] According to an embodiment of the present application, the smoke baffle control method further comprises the steps of:

[0036] determining the current fan air volume of the fan system based on the current speed and the current current of the fan system; and

[0037] adjusting the input current of the fan system so that the current fan air volume of the fan system is adjusted to the current initial air volume.

[0038] In summary, when the first driving mechanism drives the first slider to slide along the first guide rod, the smoke baffle is driven by the first slider to move transversely relative to the transverse smoke inlet, so that the central part of the smoke baffle can move to different parts of the transverse smoke inlet during the operation of the range hood, so as to match the changing distribution of oil smoke at the transverse smoke inlet, thereby achieving more accurate and efficient oil smoke suction effect while solving the problem of oil smoke escaping. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 Fig. 1 is a schematic diagram of the state of the smoke baffle in the range hood according to an embodiment of the present application before transverse movement;

[0040] Figure 2 Fig. 2 is a schematic diagram of the state of the smoke baffle in the range hood according to the above embodiment of the present application after transverse movement; Figure 1

[0041] Figure 3 Fig. 3 is a schematic diagram of the state of the smoke baffle in the range hood according to the above embodiment of the present application after transverse movement;

[0042] Figure 4 Fig. 4 is a schematic diagram of the state of the smoke baffle in the range hood according to the above embodiment of the present application before transverse movement; Figure 3

[0043] Figure 5 Fig. 5 is a schematic diagram of the structure of the range hood according to the above embodiment of the present application after removing the main body of the range hood;

[0044] Figure 6 Fig. 6 is a schematic diagram of the flow of the smoke baffle control method according to an embodiment of the present application;

[0045] Figure 7 Fig. 7 shows an example of the oil smoke concentration distribution acquisition step in the smoke baffle control method according to the above embodiment of the present application;

[0046] Figure 8 Fig. 8 shows an example of the rolling and unfolding step in the smoke baffle control method according to the above embodiment of the present application.

[0047] ​​Main element symbol explanation: 1, range hood; 10, range hood main body; 11, fan system; 12, smoke collecting cavity; 120, transverse smoke inlet; 13, sensor assembly; 131, visual sensor; 132, oil fume sensor; 20, guide assembly; 21, first guide rod; 22, first sliding block; 23, second guide rod; 24, second sliding block; 25, third sliding block; 30, smoke baffle; 40, driving assembly; 41, first driving mechanism; 411, first rotary motor; 412, first screw rod; 42, second driving mechanism; 421, second rotary motor; 422, second screw rod; 4221, left screw rod segment; 4222, right screw rod segment; 423, first screw block; 43, third driving mechanism; 431, third rotary motor; 432, third screw rod; 4321, left screw rod segment; 4322, right screw rod segment; 433, second screw block; 50, first reel shaft; 60, first reel plate; 70, second reel shaft; 80, second reel plate.

[0048] The above main element symbol explanation further details the present application in combination with the drawings and specific embodiments. Specific embodiments

[0049] In order to make the above-mentioned objectives, features and advantages of the present application more apparent, specific embodiments of the present application are described in detail below in combination with the drawings. In the following description, a large number of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, and therefore the present application is not limited to the specific embodiments disclosed below.

[0050] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0051] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0052] In the present application, unless specifically defined otherwise, the terms "mounting", "connected", "connecting", "fixed", and "fixedly" should be construed as broadest possible terms, for example, can be fixed connection, can be detachable connection, or integral; can be mechanical connection, can be electrical connection; can be direct connection, or indirect connection through intermediate medium; can be internal communication of two elements, or interaction between two elements, unless specifically defined otherwise. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0053] In the present application, unless specifically defined otherwise, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0054] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a middle element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right", and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation.

[0055] Considering that the smoke baffle will not move again during the operation, and the oil fume state at the smoke inlet is constantly changing, the smoke baffle cannot achieve more accurate and efficient smoke suction effect, and is prone to oil fume escape. Therefore, the present application provides an oil fume extractor and a smoke baffle control method, which can achieve more accurate and efficient oil fume suction effect while avoiding the problem of oil fume escape.

[0056] Specifically, according to another aspect of the present application, as Figures 1 to 5As shown, one embodiment of the present application provides a range hood 1, which may include a range hood body 10, a guide assembly 20, a smoke baffle 30 and a drive assembly 40. The range hood body 10 may include a fan system 11 and a smoke collecting chamber 12 that is connected to the fan system 11 and has a transverse smoke inlet 120. The guide assembly 20 includes a first guide rod 21 fixed to the smoke collecting chamber 12 and extending along the transverse smoke inlet 120 and a first slider 22 slidably arranged on the first guide rod 21. The smoke baffle 30 is fixedly connected to the first slider 22 and is located above the transverse smoke inlet 120. The drive assembly 40 includes a first drive mechanism 41 that is drive-connected to the first slider 22. It can be understood that the transverse mentioned in this application refers to the left and right direction (width direction) of the range hood 1.

[0057] More specifically, if Figures 3 to 5 As shown, when the first driving mechanism 41 drives the first slider 22 to slide along the first guide rod 21, the smoke baffle 30 is driven by the first slider 22 to move laterally relative to the transverse smoke inlet 120, so that the center part of the smoke baffle 30 can move to different parts of the transverse smoke inlet 120 during the operation of the range hood, so as to match the constantly changing oil smoke distribution at the transverse smoke inlet 120, thereby achieving a more accurate and efficient oil smoke suction effect while solving the problem of oil smoke escape.

[0058] It is worth noting that Figures 1 to 4 As shown, the range hood body 10 may further include a sensor assembly 13 fixed to the smoke collecting chamber 12 and arranged adjacent to the transverse smoke inlet 120, and a control board (not shown in the figure) communicatively connected to the sensor assembly 13 and the drive assembly 40. The sensor assembly 13 is used to detect the oil smoke concentration distribution at the transverse smoke inlet 120 to determine the point of the transverse smoke inlet 120 where the oil smoke concentration is the highest; the control board is used to control the drive assembly 40 to drive the smoke baffle 30 to move laterally based on the detection result of the sensor assembly 13, so that the center of the smoke baffle 30 moves to a position corresponding to the point of the highest oil smoke concentration, thereby ensuring that the path of all oil smoke is the shortest and is more easily sucked into the range hood, which helps to more accurately and efficiently absorb oil smoke and prevent oil smoke from escaping.

[0059] For example, Figure 1 and Figure 3As shown, the sensor assembly 13 can include a visual sensor 131 located below the lateral smoke inlet 120 and a plurality of oil fume sensors 132 located within the visual field of the visual sensor 131 and spaced along the extension direction of the lateral smoke inlet 120. In this way, the range hood of the present application can first acquire the oil fume concentration data of specific points in the visual image collected by the visual sensor 131 using the oil fume sensors 132, and then correct the oil fume concentration data in the visual image using the oil fume concentration data of the specific points, so as to obtain a more accurate oil fume concentration distribution map, and further determine the highest oil fume concentration position of the lateral smoke inlet 120.

[0060] Optionally, as shown in Figure 2 , Figure 4 and Figure 5 , the first driving mechanism 41 includes a first rotary motor 411 mounted to the smoke collecting cavity 12 and a first lead screw 412 connected to the output shaft of the first rotary motor 411 and threadedly connected with the first sliding block 22. In this way, the first lead screw 412 can be rotated under the drive of the first rotary motor 411 to drive the first sliding block 22 to slide along the first guide rod 21, thereby driving the smoke baffle 30 to move left and right relative to the lateral smoke inlet 120. It can be understood that in other examples of the present application, the first driving mechanism 41 can also drive the first sliding block 22 to slide along the first guide rod 21 through a belt drive mechanism or a chain drive mechanism, which will not be described herein.

[0061] Preferably, as shown in Figure 2 , Figure 4 and Figure 5 , the first lead screw 412 is arranged in parallel with the first guide rod 21, and the first sliding block 22 is slidably sleeved on the first guide rod 21, so as to more stably drive the first sliding block 22 to slide along the first guide rod 21.

[0062] It is worth noting that although the smoke baffle 30 located above the lateral smoke inlet 120 can form a negative pressure area at the lateral smoke inlet 120 to gather oil fume at the lateral smoke inlet 120 and prevent oil fume from escaping; however, if the left end or right end of the lateral smoke inlet 120 has no oil fume flowing in, and the smoke baffle 30 moves right or left relative to the lateral smoke inlet 120, at this time the left end or right end of the lateral smoke inlet 120 still has air without oil fume flowing in, resulting in the wind energy provided by the fan system 11 being wasted.

[0063] Therefore, in order to make full use of the wind energy provided by the fan system 11 and further improve the oil smoke extraction efficiency, as shown in Figure 2 , Figure 4 and Figure 5As shown, the range hood of the present application can further comprise a first reel 50 rotatably arranged in the smoke collecting cavity 12 and located at the left end of the transverse smoke inlet 120, a first winding plate 60 having one end wound around the first reel 50, a second reel 70 rotatably arranged in the smoke collecting cavity 12 and located at the right end of the transverse smoke inlet 120, and a second winding plate 80 having one end wound around the second reel 70. Meanwhile, the driving assembly 40 can comprise a second driving mechanism 42 drivingly connected with the other end of the first winding plate 60 and a third driving mechanism 43 drivingly connected with the other end of the second winding plate 80. In this way, the first winding plate 60 can be spread out to close the left end of the transverse smoke inlet 120 under the driving of the second driving mechanism 42; the second winding plate 80 can be spread out to close the right end of the transverse smoke inlet 120 under the driving of the third driving mechanism 43, so as to block the oil-free smoke from entering the smoke collecting cavity 12 from the left end or the right end of the transverse smoke inlet 120, reduce the flow cross section of the transverse smoke inlet 120, increase the negative pressure intensity at the transverse smoke inlet 120, and further improve the smoke suction efficiency.

[0064] Optionally, as shown in Figure 2 , Figure 4 and Figure 5 , the second driving mechanism 42 comprises a second rotary motor 421 mounted on the smoke collecting cavity 12, a second lead screw 422 connected with the output shaft of the second rotary motor 421 and extending along the transverse smoke inlet 120, and a first screw block 423 threadedly connected with the second lead screw 422 and fixedly connected with the other end of the first winding plate 60. In this way, when the second lead screw 422 rotates under the driving of the second rotary motor 421 to drive the first screw block 423 to slide to the right, the other end of the first winding plate 60 is driven to slide to the right, so that the first winding plate 60 is spread out to close the left end of the transverse smoke inlet 120.

[0065] Similarly, as shown in Figure 2 , Figure 4 and Figure 5 , the third driving mechanism 43 comprises a third rotary motor 431 mounted on the smoke collecting cavity 12, a third lead screw 432 connected with the output shaft of the third rotary motor 431 and extending along the transverse smoke inlet 120, and a second screw block 433 threadedly connected with the third lead screw 432 and fixedly connected with the other end of the second winding plate 80. In this way, when the third lead screw 432 rotates under the driving of the third rotary motor 431 to drive the second screw block 433 to slide to the left, the other end of the second winding plate 80 is driven to slide to the left, so that the second winding plate 80 is spread out to close the right end of the transverse smoke inlet 120.

[0066] Optionally, as shown in Figure 5As shown, the second screw rod 422 and the third screw rod 432 are parallel to the first screw rod 412; wherein the second screw rod 422 has a left screw rod segment 4221 threadedly connected with the first screw block 423 and a right light rod segment 4222 slidingly connected with the second screw block 433; and the third screw rod 432 has a left light rod segment 4321 slidingly connected with the first screw block 423 and a right screw rod segment 4322 threadedly connected with the second screw block 433. In this way, the right light rod segment 4222 of the second screw rod 422 can serve as a guide rod for the second screw block 433, and the left light rod segment 4321 of the third screw rod 432 can serve as a guide rod for the first screw block 423, without the need to additionally provide independent guide rods for the first screw block 423 and the second screw block 433, which helps to simplify the structure and reduce the cost.

[0067] Optionally, as shown in Figure 2 , Figure 4 and Figure 5 , the guide assembly 20 further comprises a second guide rod 23 fixedly arranged in the smoke collecting cavity 12 and extending along the lateral smoke inlet 120, a second sliding block 24 slidingly arranged in the second guide rod 23 and fixedly connected with the other end of the first winding plate 60, and a third sliding block 25 slidingly arranged in the second guide rod 23 and fixedly connected with the other end of the second winding plate 80, so as to guide the first winding plate 60 and the second winding plate 80 to move leftward and rightward along the lateral smoke inlet 120 through the second guide rod 23, which is conducive to better closing the left end or the right end of the lateral smoke inlet 120.

[0068] Notably, as shown in Figure 2 and Figure 4 , the first guide rod 21 and the second guide rod 23 are respectively located on the upper side and the lower side of the lateral smoke inlet 120, and the second screw rod 422 and the third screw rod 432 are both located on the upper side of the lateral smoke inlet 120. In this way, the second sliding block 24 and the third sliding block 25 can be correspondingly fixedly connected with the lower right corner of the first winding plate 60 and the lower left corner of the second winding plate 80 respectively; and the first screw block 423 and the second screw block 433 can be correspondingly fixedly connected with the upper right corner of the first winding plate 60 and the upper left corner of the second winding plate 80 respectively, so as to better spread the first winding plate 60 and the second winding plate 80.

[0069] In addition, in order to ensure that the first and second winding plates 60 and 80 can be respectively rewound on the first and second winding shafts 50 and 70, the range hood further comprises a first torsion spring (not shown in the figure) installed on the first winding shaft 50 and a second torsion spring (not shown in the figure) installed on the second winding shaft 70, so as to drive the first and second winding shafts 50 and 70 to rotate reversely, so that the first and second winding plates 60 and 80 are respectively rewound on the first and second winding shafts 50 and 70 to open the left and right end portions of the transverse smoke inlet 120. It can be understood that in other examples of the present application, the first and second torsion springs can also be replaced by elastic elements such as coil springs, as long as the required rewinding reset effect is achieved, and the present application will not be described here.

[0070] It is worth mentioning that, according to another aspect of the present application, as Figure 6 shown, one embodiment of the present application further provides a smoke baffle control method, which can comprise the steps of:

[0071] S300: obtaining the oil fume concentration distribution within a predetermined time period through the sensor assembly to obtain the highest oil fume concentration position of the transverse smoke inlet within the predetermined time period; and

[0072] S400: controlling the first driving mechanism of the driving assembly to work to drive the smoke baffle to move transversely relative to the transverse smoke inlet, so that the central part of the smoke baffle moves to a position corresponding to the highest oil fume concentration position.

[0073] It is worth noting that, since the oil fume concentration distribution at the transverse smoke inlet is usually constantly changing, so that the instantaneous highest oil fume concentration position of the transverse smoke inlet is constantly fluctuating, therefore, in order to reduce the moving frequency of the smoke baffle, the smoke baffle control method of the present application can use the median of the instantaneous highest oil fume concentration position of the transverse smoke inlet within the predetermined time period to indicate the centermost of the oil fume distribution of the transverse smoke inlet within the predetermined time period as the highest oil fume concentration position, so as to ensure that when the central part of the smoke baffle moves to the position corresponding to the highest oil fume concentration position, the path of all oil fumes is the shortest, and it is easier to be sucked into the range hood.

[0074] Optionally, in one example of the present application, as Figure 7 shown, the step S300 in the smoke baffle control method of the present application comprises the steps of:

[0075] S310: obtaining the oil fume concentration distribution diagram at different time within the predetermined time period through the sensor assembly;

[0076] S320: analyzing the oil fume concentration distribution diagram at each time within the predetermined time period to obtain the instantaneous highest oil fume concentration position of the transverse smoke inlet at the corresponding time; and

[0077] S330: sorting the plurality of instantaneous highest oil fume concentrations in the predetermined time period and taking the median to obtain the highest oil fume concentration of the transverse smoke inlet in the predetermined time period.

[0078] It can be understood that the principle of obtaining the oil fume concentration distribution mentioned in the present application is to obtain the oil fume concentration of specific points in the visual image by using the oil fume sensor, and then correct the oil fume concentration data in the visual image by using the oil fume concentrations of the points, and then obtain a more accurate oil fume concentration distribution map. In addition, the instantaneous highest oil fume concentration mentioned in the present application is identified by the visual sensor, which is identified based on a large amount of data in the design stage.

[0079] It is worth noting that, as shown in Figure 6 , the smoke baffle control method of the present application can further include the following steps before the step S300:

[0080] S100: when the gear of the range hood is started, it is judged whether the intelligent mode is turned on: if yes, the current maximum oil fume concentration and the current initial air volume are obtained; if no, the fan system is kept working normally; and

[0081] S200: it is judged whether the current maximum oil fume concentration is greater than the first preset oil fume concentration threshold: if yes, the step S300 is executed; if no, the step S100 is returned.

[0082] It can be understood that when the user turns on the range hood and starts an oil fume range gear, the fan system will work normally; at this time, if the user turns on the intelligent mode, the current maximum oil fume concentration will be obtained first, and then it is judged whether the current maximum oil fume concentration is greater than the first preset oil fume concentration threshold; if the user does not turn on the intelligent mode, the adjustment of the smoke baffle is directly skipped, and the fan system is controlled to continue to work normally. In particular, when the current maximum oil fume concentration is less than or equal to the first preset oil fume concentration threshold, it indicates that the current maximum oil fume concentration is small, and the smoke baffle does not need to be adjusted to move horizontally.

[0083] In addition, after the smoke baffle moves horizontally, the left end or the right end of the transverse smoke inlet will have air flowing in without oil fume, resulting in the waste of wind energy provided by the fan system. In order to solve this problem, as shown in Figure 6 , the smoke baffle control method of the present application can further include the following steps after the step S400:

[0084] S500: controlling the second driving mechanism or the third driving mechanism of the driving assembly to work to drive the first winding plate or the second winding plate to spread along the transverse direction of the smoke baffle.

[0085] Exemplarily, in one example of the present application, as shown in Figure 8As shown, the step S500 of the smoke baffle control method can include the steps of:

[0086] S510: obtaining a farthest oil fume concentration collected via an oil fume sensor farthest from the position of the highest oil fume concentration;

[0087] S520: determining whether the farthest oil fume concentration is less than or equal to a second preset oil fume concentration threshold value;

[0088] S530: in response to the farthest oil fume concentration being less than or equal to the second preset oil fume concentration threshold value, driving the roll to spread horizontally away from the position of the highest oil fume concentration, and making the spreading length equal to the horizontal moving distance of the smoke baffle; and

[0089] S540: in response to the farthest oil fume concentration being greater than the second preset oil fume concentration threshold value, driving the roll to spread horizontally away from the position of the highest oil fume concentration, and making the spreading length equal to N times the horizontal moving distance of the smoke baffle, where N is equal to the ratio between the second preset oil fume concentration threshold value and the farthest oil fume concentration.

[0090] It is worth noting that the second preset oil fume concentration threshold value mentioned in the present application can be set in advance, and when the oil fume concentration is lower than the second preset oil fume concentration threshold value, it can be determined that there is basically no oil fume here. In addition, when the smoke baffle moves horizontally to the left, the oil fume sensor located at the far right will be farthest from the position of the highest oil fume concentration, at which time the third driving mechanism is controlled to operate to drive the third roll to spread to the left, preventing oil fume-free air from entering from the right end of the horizontal smoke inlet; and when the smoke baffle moves horizontally to the right, the oil fume sensor located at the far left will be farthest from the position of the highest oil fume concentration, at which time the second driving mechanism is controlled to operate to drive the second roll to spread to the right, preventing oil fume-free air from entering from the left end of the horizontal smoke inlet, which helps to improve the wind energy utilization rate of the fan system.

[0091] In particular, as the roll spreads, the flow cross section of the horizontal smoke inlet will become smaller, resulting in a change in the fan flow rate of the fan system; and in order to ensure that the fan flow rate remains stable before and after the smoke baffle is regulated, as shown, Figure 6 the smoke baffle control method of the present application can further include the steps of:

[0092] S600: determining the current fan flow rate of the fan system based on the current speed and the current current of the fan system; and

[0093] S700: adjusting the input current of the fan system so that the current fan flow rate of the fan system is adjusted to the current initial flow rate.

[0094] It can be understood that the air volume mentioned in the present application is generally determined according to the rotation speed and input current of the fan system, which can be obtained by querying the data in the database, and the present application will not be repeated here.

[0095] In summary, the specific control example of the smoke baffle control method of the present application is as follows:

[0096] S1, the user opens the range hood and starts an oil fume position, at this time the fan system works normally;

[0097] S2, determine whether the user opens the intelligent mode, if yes, go to S3, if not, go to S14;

[0098] S3, get the current maximum oil fume concentration c1 fed back by the oil fume sensor, and determine the current initial air volume q1 according to the rotation speed and input current of the fan;

[0099] S4, determine whether the current maximum oil fume concentration c1 is greater than c0, if yes, go to S5, if not, go to S2; wherein c0 is the first preset oil fume concentration threshold, when below the threshold, the smoke baffle does not need to move;

[0100] S5, obtain the oil fume concentration distribution graph within a period of time t1 through the visual sensor and the oil fume sensor;

[0101] S6, analyze the oil fume concentration distribution graph within the time t1 to obtain the highest position of the oil fume concentration, and record it as the data set d1; wherein the highest position of the oil fume concentration is identified by the visual sensor, based on a large amount of data identified in the design stage, the oil fume position refers to the position of the highest oil fume concentration relative to the width direction of the range hood; the principle of obtaining the oil fume concentration distribution is to obtain the oil fume concentration of specific points in the visual image using the oil fume sensor, and to correct the oil fume concentration data in the visual image using the oil fume concentration data of these points, and then to obtain a more accurate oil fume concentration distribution graph;

[0102] S7, take the median data information of the data set d1 sorted from small to large, and record it as d2; wherein the principle of taking the median as d2 is that the position d2 is the center of the oil fume distribution within the period of time, at this position the path of all oil fume can be ensured to be the shortest, and it is easier to be sucked into the range hood;

[0103] S8, control the first rotary motor to rotate to move the center of the smoke baffle to the position d2, and calculate the moving distance d3;

[0104] S9, get the data c3 of the oil fume sensor farthest from the position d2;

[0105] S10, judging whether c3 is less than or equal to c2, if yes, entering S12, if no, entering S11; wherein c2 is a second preset oil fume concentration threshold value, when being lower than the threshold value, it can be considered that there is basically no oil fume at the position;

[0106] S11, controlling the second rotating motor or the third rotating motor to rotate to open the length d3*c2 / c3 of the rolling plate away from the position d2; if d2 is located at the left relative to the range hood, the motor 2 is controlled to rotate to open the right rolling plate; entering S13;

[0107] S12, controlling the second rotating motor or the third rotating motor to rotate to open the length d3 of the rolling plate away from the position d2; entering S13;

[0108] S13, determining the fan air volume q2 according to the current rotating speed and current, adjusting the input current of the fan motor after inquiring the database data, and maintaining the fan air volume as the current initial air volume q1;

[0109] S14, maintaining the normal operation of the fan system;

[0110] S15, the user ends.

[0111] The technical features of the above embodiments can be combined arbitrarily, and in order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered that it is within the scope of the present application.

[0112] The above embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it should not be understood as the limitation of the scope of the present application. It should be pointed out that, for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the protection scope of the present application.

Claims

1. A range hood, characterized in that: include: The range hood body includes a fan system and a smoke collecting chamber connected to the fan system and provided with a transverse smoke inlet; A guide assembly comprising a first guide rod fixedly mounted on the smoke collecting chamber and extending along the transverse smoke inlet, and a first slider slidably mounted on the first guide rod; a smoke baffle, fixedly connected to the first slider and located above the transverse smoke inlet; a sensor assembly, the sensor assembly being fixedly mounted in the smoke collecting chamber and arranged adjacent to the transverse smoke inlet, and being used to detect the oil smoke concentration distribution at the transverse smoke inlet, so as to determine the location of the transverse smoke inlet where the oil smoke concentration is the highest; as well as A driving assembly comprising a first driving mechanism drivingly connected to the first slider; When the first driving mechanism drives the first slider to slide along the first guide rod, the smoke shield moves laterally relative to the transverse smoke inlet under the drive of the first slider, so that the center part of the smoke shield can move to different parts of the transverse smoke inlet during the operation of the range hood, thereby realizing the movement of the center part of the smoke shield to the position corresponding to the highest oil smoke concentration.

2. The range hood according to claim 1, characterized in that: The range hood body further includes a control board communicatively connected to the sensor assembly and the drive assembly; the control board is used to control the drive assembly to drive the smoke baffle to move laterally based on the detection result of the sensor assembly.

3. The range hood according to claim 2, characterized in that: The sensor assembly includes a visual sensor located below the transverse smoke inlet and a plurality of oil smoke sensors located within the field of view of the visual sensor and arranged at intervals along the extending direction of the transverse smoke inlet.

4. The range hood according to any one of claims 1 to 3, characterized in that: The first driving mechanism includes a first rotating motor installed in the smoke collecting chamber and a first screw rod connected to the output shaft of the first rotating motor and threadedly connected to the first sliding block.

5. The range hood according to any one of claims 1 to 3, characterized in that: The range hood further includes a first reel rotatably arranged in the smoke collecting chamber and located at the left end of the horizontal smoke inlet, a first reel with one end wound around the first reel, a second reel rotatably arranged in the smoke collecting chamber and located at the right end of the horizontal smoke inlet, and a second reel with one end wound around the second reel; the drive assembly includes a second drive mechanism drivingly connected to the other end of the first reel and a third drive mechanism drivingly connected to the other end of the second reel.

6. The range hood according to claim 5, characterized in that: The second driving mechanism includes a second rotating motor installed in the smoke collecting chamber, a second screw rod connected to the output shaft of the second rotating motor and extending along the horizontal smoke inlet, and a first screw block threadedly connected to the second screw rod and fixedly connected to the other end of the first rolling plate; the third driving mechanism includes a third rotating motor installed in the smoke collecting chamber, a third screw rod connected to the output shaft of the third rotating motor and extending along the horizontal smoke inlet, and a second screw block threadedly connected to the third screw rod and fixedly connected to the other end of the second rolling plate.

7. The range hood according to claim 6, characterized in that: The second screw rod is parallel to the third screw rod; the second screw rod has a left screw rod section threadedly connected to the first screw block and a right polished rod section slidingly connected to the second screw block; the third screw rod has a left polished rod section slidingly connected to the first screw block and a right screw rod section threadedly connected to the second screw block.

8. The range hood according to claim 5, characterized in that: The guide assembly further includes a second guide rod fixed to the smoke collecting chamber and extending along the transverse smoke inlet, a second slider slidably arranged on the second guide rod and fixedly connected to the other end of the first rolling plate, and a third slider slidably arranged on the second guide rod and fixedly connected to the other end of the second rolling plate.

9. A smoke barrier control method, characterized in that: The range hood according to any one of claims 1 to 8 comprises the steps of: Obtaining the oil smoke concentration distribution within a predetermined time period through the sensor assembly to obtain the point where the oil smoke concentration is highest at the transverse smoke inlet within the predetermined time period; and The first driving mechanism of the control driving assembly operates to drive the smoke baffle to move laterally relative to the transverse smoke inlet, so that the center of the smoke baffle moves to a position corresponding to the highest oil smoke concentration.

10. The smoke baffle control method according to claim 9, characterized in that: The step of obtaining the oil smoke concentration distribution within a predetermined time period by using the sensor component to obtain the point where the oil smoke concentration at the transverse smoke inlet is the highest within the predetermined time period comprises the following steps: Obtaining the oil smoke concentration distribution diagram at different times within a predetermined time period through the sensor assembly; Analyze the oil smoke concentration distribution diagram at each moment in the predetermined time period to obtain the instantaneous maximum oil smoke concentration of the horizontal smoke inlet at the corresponding moment; as well as The multiple instantaneous maximum oil fume concentrations within the predetermined time period are sorted and the median is taken to obtain the maximum oil fume concentration of the horizontal smoke inlet within the predetermined time period.

11. The smoke barrier control method according to claim 9, characterized in that: Before the step of obtaining the oil smoke concentration distribution within a predetermined time period through the sensor assembly to obtain the point where the oil smoke concentration at the transverse smoke inlet is the highest within the predetermined time period, the step further includes: When the range hood is activated, determine whether the intelligent mode is on: if so, obtain the current maximum oil smoke concentration and the current initial air volume; if not, keep the fan system working normally; and Determine whether the current maximum oil smoke concentration is greater than the first preset oil smoke concentration threshold: if so, execute the step of obtaining the oil smoke concentration distribution within the predetermined time period through the sensor component to obtain the highest oil smoke concentration at the horizontal smoke inlet within the predetermined time period; if not, return to the step of determining whether to turn on the smart mode.

12. The smoke baffle control method according to any one of claims 9 to 11, characterized in that: After the step of operating the first driving mechanism of the control drive assembly to drive the smoke shield to move laterally relative to the transverse smoke inlet so that the center of the smoke shield moves to a position corresponding to the point where the oil smoke concentration is the highest, the step further includes: The second drive mechanism or the third drive mechanism of the control drive assembly operates to drive the first roll plate or the second roll plate to spread out along the transverse direction of the smoke shield plate.

13. The smoke barrier control method according to claim 12, characterized in that: The step of controlling the second drive mechanism or the third drive mechanism of the drive assembly to operate to drive the first roll plate or the second roll plate to spread out along the transverse direction of the smoke barrier plate comprises the following steps: Obtaining the farthest oil smoke concentration collected by the oil smoke sensor that is farthest from the point with the highest oil smoke concentration; Determining whether the farthest oil smoke concentration is less than or equal to a second preset oil smoke concentration threshold; In response to the farthest oil smoke concentration being less than or equal to the second preset oil smoke concentration threshold, driving the roll plate away from the point with the highest oil smoke concentration to spread out laterally, and making the spread length equal to the lateral movement distance of the smoke baffle; as well as In response to the farthest oil fume concentration being greater than the second preset oil fume concentration threshold, the roll plate away from the point with the highest oil fume concentration is driven to spread out laterally, and the spread out length is equal to N times the lateral movement distance of the smoke baffle, where N is equal to the ratio between the second preset oil fume concentration threshold and the farthest oil fume concentration.

14. The smoke barrier control method according to claim 12, characterized in that: Further comprising the steps of: Determine the current fan air volume of the fan system based on the current speed and current current of the fan system; and The input current of the fan system is adjusted so that the current fan air volume of the fan system is adjusted to the current initial air volume.

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