Range hood and control method thereof

Abstract

According to the range hood and the control method thereof provided by the embodiment of the invention, the air blocking disc is arranged in the air inlet channel of the range hood, and the unfolding area of the air blocking disc is adjustable; the control method comprises the steps of firstly obtaining current to-be-absorbed oil smoke information; then according to the current to-be-absorbed oil smoke information, the unfolding area of the air blocking disc is adjusted so as to adjust the air inlet area of the air inlet channel; and the air inlet area of the air inlet channel is inversely proportional to the air inlet efficiency. By means of the method, the problem that when the air suction efficiency of an existing range hood is adjusted, noise is large by increasing the power of the draught fan, and the user experience is affected is solved, the air inlet area of the air inlet channel is adjusted by adjusting the unfolding area of the air blocking disc, and therefore the air inlet efficiency is adjusted, noise interference is avoided, and the user experience is improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of kitchen appliances, and in particular to a range hood and a control method thereof. Background Art

[0002] Tabletop range hoods are appliances used to absorb and remove fumes and odors generated during cooking. Compared with traditional range hoods that are fixedly installed above the kitchen stove, tabletop range hoods are more flexible in use. They can be used in different spaces such as living rooms and outdoor gatherings, but are not limited to them. They can effectively filter and purify the air to keep the dining environment clean and comfortable. Therefore, they have higher requirements for fume absorption and noise.

[0003] When facing a large amount of oil smoke, existing desktop range hoods often increase the speed of the fan to improve the extraction efficiency, which will cause greater noise and thus affect the user experience. Summary of the invention

[0004] The embodiment of the present invention provides a range hood and a control method thereof, so as to adjust the smoke extraction efficiency of the range hood by adjusting the deployment area of ​​a wind shield plate of an air inlet channel of the range hood, thereby enhancing the oil fume extraction effect while ensuring that the noise is at a low level.

[0005] In a first aspect, an embodiment of the present invention provides a range hood, the range hood comprising an air inlet channel;

[0006] A wind shield is arranged in the air inlet channel; the unfolding area of ​​the wind shield is adjustable.

[0007] Optionally, the range hood further includes an image sensor; the image sensor is arranged on the outside of the air inlet of the range hood, and the image sensor is located at the center of the range hood in the horizontal direction.

[0008] Optionally, the wind shield plate includes a rotating motor, a bottom plate, a plurality of nested plates and a top plate stacked in sequence along a first direction; the first direction is a wind suction direction; the bottom plate, the nested plates and the top plate all have openings and their projections in the first direction overlap before being unfolded;

[0009] The rotating motor is used to drive any two adjacent bottom plates, multi-layer nested plates and top plates stacked in sequence to rotate relative to each other so as to cover each other's openings and change the unfolding area of ​​the windshield.

[0010] Optionally, the top plate and the multi-layer nested plate are provided with limiting protrusions at the edge positions of the surfaces on one side facing the bottom plate, and the multi-layer nested plate and the bottom plate are provided with limiting grooves at the edge positions for the limiting protrusions to move along the rotation direction, and the limiting protrusions are placed in the limiting grooves of the next plate layer;

[0011] A transmission protrusion is arranged on the motor shaft of the rotating motor, and a transmission groove is arranged at the center of the top plate. The transmission protrusion of the motor shaft is transmission-connected with the transmission groove of the top plate. The rotating motor drives the top plate to rotate, thereby driving the limit protrusion of the top plate to rotate, so that the limit protrusion rotates to the extreme position of the limit groove of the next plate layer, thereby driving the next plate layer to rotate.

[0012] Optionally, the bottom plate includes a limiting circular ring rail, a nesting plate movement limiting groove, a motor fixing hole and a motor shaft through hole;

[0013] The edges of the top plate and the nesting plate are embedded in the limiting circular ring rail;

[0014] The limiting protrusion on the nesting plate close to the bottom plate is placed in the nesting plate movement limiting groove on the bottom plate;

[0015] The motor shaft of the rotating motor passes through the motor shaft through-hole, and the rotating motor is fixed to the bottom plate through the motor fixing hole.

[0016] Optionally, the top plate further includes a motor shaft matching recess and a rotation limiting protrusion;

[0017] The transmission groove is arranged in the motor shaft matching concave stage, and the end of the motor shaft of the rotating motor extends into the transmission groove to be transmission-connected with the motor shaft matching concave stage;

[0018] The rotation limiting protrusion is placed in the limiting groove on the nesting plate close to the top plate.

[0019] In a second aspect, an embodiment of the present invention provides a control method for a range hood, wherein a wind shielding plate is provided in an air inlet passage of the range hood, and the deployment area of ​​the wind shielding plate is adjustable;

[0020] The control method includes:

[0021] Get the current oil smoke information to be absorbed;

[0022] According to the current information of the oil smoke to be absorbed, the unfolded area of ​​the wind shield is adjusted to adjust the air intake area of ​​the air intake channel; wherein, the air intake area of ​​the air intake channel is inversely proportional to the air intake efficiency.

[0023] Optionally, the range hood includes an image sensor, which is arranged outside the air inlet of the range hood, and the image sensor is located at the center of the range hood in the horizontal direction;

[0024] Get the current oil smoke information to be absorbed, including:

[0025] Using an image sensor, obtaining the current image of the oil smoke to be absorbed;

[0026] In the current oil smoke image to be absorbed, identifying the contour of the current oil smoke to be absorbed;

[0027] According to the current information of oil smoke to be absorbed, the expansion area of ​​the air shield of the range hood is adjusted, including:

[0028] Adjust the deployment area of ​​the range hood wind shield according to the contour area of ​​the current oil smoke to be absorbed.

[0029] Optionally, before adjusting the deployment area of ​​the wind shield plate of the range hood according to the contour area of ​​the current oil smoke to be absorbed, the method further includes:

[0030] It is determined that the contour area of ​​the current oil smoke to be absorbed is larger than the preset area.

[0031] Optionally, the wind shield plate includes a rotating motor, a bottom plate, a plurality of nested plates and a top plate stacked in sequence along a first direction; the first direction is a wind suction direction; the bottom plate, the nested plates and the top plate all have openings and their projections in the first direction overlap before being unfolded;

[0032] The rotating motor is used to drive any two adjacent bottom plates, multi-layer nested plates and top plates stacked in sequence to rotate relative to each other, so as to cover each other's openings and change the unfolding area of ​​the windshield;

[0033] According to the current information of oil smoke to be absorbed, the expansion area of ​​the air shield of the range hood is adjusted, including:

[0034] According to the current information of oil smoke to be absorbed, the rotary motor is driven to rotate at a preset angle step, and the deployment area of ​​the wind shield plate is adjusted at a preset area step.

[0035] Optionally, before driving the rotary motor to rotate at a preset angle step according to the current oil fume to be absorbed information and adjusting the deployment area of ​​the windshield plate at a preset area step, the method further includes:

[0036] It is determined that the current rotation angle of the rotary motor is less than an angle threshold.

[0037] Optionally, after obtaining the current oil fume information to be absorbed, before adjusting the deployment area of ​​the wind shield plate to adjust the air intake area of ​​the air intake channel, the method further includes:

[0038] It is determined whether the current oil fume information to be absorbed is greater than the preset oil fume information to be absorbed, and when the current oil fume information to be absorbed is greater than the preset oil fume information to be absorbed, the rotation speed of the fan in the range hood is increased to increase the exhaust efficiency of the range hood.

[0039] Optionally, after increasing the rotation speed of the fan in the range hood to increase the smoking efficiency of the range hood, the method further includes:

[0040] Detect the wind speed at the range hood outlet;

[0041] When the wind speed is greater than the preset wind speed, the fan speed is reduced by a preset ratio.

[0042] The embodiment of the present invention provides a range hood and a control method thereof, wherein a windshield is provided in the air inlet channel of the range hood, and the deployment area of ​​the windshield is adjustable; the control method first obtains the current oil fume information to be absorbed; then, according to the current oil fume information to be absorbed, the deployment area of ​​the windshield is adjusted to adjust the air inlet area of ​​the air inlet channel; wherein the air inlet area of ​​the air inlet channel is inversely proportional to the air inlet efficiency. The above method solves the problem that when the existing range hood adjusts the air suction efficiency, increasing the power of the fan will cause a large noise that affects the user experience. By adjusting the deployment area of ​​the windshield to adjust the air inlet area of ​​the air inlet channel, the air inlet efficiency is adjusted without causing noise interference, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a schematic structural diagram of a range hood provided in Embodiment 1 of the present invention;

[0044] Figure 2 is a structural schematic diagram of another range hood provided in Embodiment 1 of the present invention;

[0045] Figure 3 This is a schematic diagram of a windshield structure provided by Embodiment 1 of the present invention;

[0046] Figure 4 This is a schematic diagram of the internal structure of a windshield provided in Embodiment 1 of the present invention;

[0047] Figure 5 This is a schematic diagram of a partial structure of a bottom plate in a windshield provided in the first embodiment of the present invention;

[0048] Figure 6 It is a schematic diagram of the partial structure of a top plate in a windshield provided in the first embodiment of the present invention;

[0049] Figure 7 It is a flow chart of a method for controlling a range hood provided in the second embodiment of the present invention;

[0050] Figure 8 It is a flow chart of a method for controlling a range hood provided in Embodiment 3 of the present invention;

[0051] Fig. 9 This is a flowchart of a working process of a range hood provided by a fourth embodiment of the present invention;

[0052] Fig.10 is a schematic structural diagram of a control device for a range hood provided in Embodiment 5 of the present invention;

[0053] Fig.11 It is a structural schematic diagram of a range hood provided by Embodiment 6 of the present invention;

[0054] Among them, 10-air inlet channel;

[0055] 20-wind shield plate, 21-rotating motor, 211-transmission convex block, 212-motor shaft, 213-bolt hole, 22-bottom plate, 221-limiting circular ring rail, 222-nesting plate motion limiting groove, 223-motor fixing hole, 224-motor shaft through hole; 23-nesting plate, 24-top plate, 241-transmission groove, 242-motor shaft matching concave platform, 243-rotation limiting convex block, 25-limiting convex block, 26-limiting groove;

[0056] 30-image sensor, 31-contour area of ​​the oil smoke to be absorbed, 32-preset contour area;

[0057] 410 - oil smoke information acquisition module to be absorbed, 420 - area adjustment module;

[0058] 51 - processor, 52 - storage device, 53 - input device, 54 - output device. DETAILED DESCRIPTION

[0059] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0060] It should be mentioned before discussing exemplary embodiments in more detail that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow charts describe various operations (or steps) as sequential processes, many operations therein can be implemented in parallel, concurrently or simultaneously. In addition, the order of various operations can be rearranged. The process can be terminated when its operation is completed, but can also have additional steps not included in the accompanying drawings. The process can correspond to methods, functions, procedures, subroutines, subprograms, etc. In addition, the embodiments in the present invention and the features in the embodiments can be combined with each other without conflict.

[0061] The term “including” and its variations used in the present invention are open inclusions, that is, “including but not limited to.” The term “based on” means “based at least in part on.” The term “one embodiment” means “at least one embodiment.”

[0062] It should be noted that the concepts such as "first" and "second" mentioned in the present invention are only used to distinguish the corresponding contents, and are not used to limit the order or interdependence.

[0063] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0064] Embodiment 1

[0065] Figure 1 is a schematic diagram of the structure of a range hood provided in the first embodiment of the present invention, with reference to Figure 1 The range hood comprises an air inlet channel 10; a windshield plate 20 is arranged in the air inlet channel 10; and the deployment area of ​​the windshield plate 20 is adjustable.

[0066] Among them, the air intake area of ​​the air intake channel 10 determines the air intake efficiency. For example, when there is a lot of oil smoke to be absorbed, the suction efficiency needs to be increased. Therefore, the expansion area of ​​the wind shield plate 20 can be adjusted to make the wind shield plate 20 expand, thereby reducing the air intake area of ​​the air intake channel 10, thereby increasing the suction wind pressure and increasing the suction efficiency to absorb the current oil smoke.

[0067] The range hood provided in the first embodiment of the present invention has a wind shield plate arranged in the air inlet channel of the range hood. The expanded area of ​​the wind shield plate can be adjusted according to the concentration of the oil fume to be absorbed, so that the air inlet area of ​​the air inlet channel and the air inlet efficiency can be inversely proportional. Therefore, by using the above-mentioned range hood, it is possible to solve the problem that when the suction efficiency of the existing range hood is adjusted, the power of the fan is increased, which will cause a lot of noise and affect the user experience. The air inlet area of ​​the air inlet channel is adjusted by adjusting the expanded area of ​​the wind shield plate, thereby adjusting the air inlet efficiency without causing noise interference, thereby improving the user experience.

[0068] Figure 2 is a schematic diagram of the structure of another range hood provided in the first embodiment of the present invention, with reference to Figure 2 Based on the above embodiment, optionally, the range hood further includes an image sensor 30; the image sensor 30 is arranged on the outside of the air inlet of the range hood, and the image sensor 30 is located at the center of the range hood in the horizontal direction.

[0069] The image sensor 30 is located at the center of the range hood for accurate acquisition of oil fume information. Thus, the image captured by the image sensor 30 can be used to identify the contour of the oil fume to be absorbed, and then used to determine the concentration of the oil fume to be absorbed, and the unfolded area of ​​the windshield 20 can be adjusted based on feedback, so as to change the exhaust efficiency of the range hood to adapt to the current concentration of the oil fume to be absorbed.

[0070] Figure 3 is a schematic diagram of a windshield structure provided by the first embodiment of the present invention, referring to Figure 3 Specifically, the windshield 20 includes a rotating motor 21, a bottom plate 22, a multi-layer nesting plate 23 and a top plate 24 stacked in sequence along a first direction; the first direction is a wind suction direction; the bottom plate 22, the nesting plate 23 and the top plate 24 all have openings and their projections in the first direction overlap before they are unfolded;

[0071] The rotary motor 21 is used to drive any two adjacent bottom plates 22 , multi-layer nested plates 23 and top plates 24 stacked in sequence to rotate relative to each other so as to cover each other's openings and change the unfolding area of ​​the windshield 20 .

[0072] Figure 4 This is a schematic diagram of the internal structure of a windshield provided in the first embodiment of the present invention, referring to Figure 3 and Figure 4 Furthermore, the edge positions of the top plate 24 and the multi-layer nested plate 23 on one side of the surface facing the bottom plate 22 are both provided with limiting protrusions 25, and the edge positions of the multi-layer nested plate 23 and the bottom plate 22 are both provided with limiting grooves 26 for the limiting protrusions 25 to move along the rotation direction, and the limiting protrusions 25 are placed in the limiting grooves 26 of the next plate layer;

[0073] A transmission protrusion 211 is arranged on the motor shaft 212 of the rotating motor 21, and a transmission groove 241 is arranged at the center of the top plate 24. The transmission protrusion 211 of the motor shaft 212 is transmission-connected with the transmission groove 241 of the top plate 24. The rotating motor 21 drives the top plate 24 to rotate, thereby driving the limiting protrusion 25 of the top plate 24 to rotate, so that the limiting protrusion 25 rotates to the extreme position of the limiting groove 26 of the next plate layer, thereby driving the next plate layer to rotate.

[0074] Figure 5 is a partial structural schematic diagram of a bottom plate in a windshield provided in the first embodiment of the present invention, with reference to Figure 3-Figure 5 The bottom plate 22 includes a limiting circular rail 221, a nesting plate movement limiting groove 222, a motor fixing hole 223 and a motor shaft through hole 224; the edges of the top plate 24 and the nesting plate 23 are embedded in the limiting circular rail 221; the limiting protrusion 25 on the nesting plate 23 close to the bottom plate 22 is placed in the nesting plate movement limiting groove 222 on the bottom plate 22; the motor shaft 212 of the rotating motor 21 passes through the motor shaft through hole 224, and the rotating motor 21 is fixed to the bottom plate 22 through the motor fixing hole 223. Specifically, continuing to refer to 3, the rotating motor 21 can also be provided with a bolt hole 213, and the bolt hole 213 and the motor fixing hole 223 are fixed by bolts.

[0075] Figure 6 is a schematic diagram of a partial structure of a top plate in a windshield provided in the first embodiment of the present invention, with reference to Figure 3-Figure 6 The top plate 24 also includes a motor shaft mating recess 242 and a rotation limiting protrusion 243; a transmission groove 241 is arranged in the motor shaft mating recess 242, and the end of the motor shaft 212 of the rotating motor 21 extends into the transmission groove 241 to be transmission-connected with the motor shaft mating recess 242; the rotation limiting protrusion 243 is placed in the limiting groove 26 on the nesting plate 23 close to the top plate 24.

[0076] Specifically, the edge of the top plate 24 cooperates with the limiting circular rail 221 to ensure its stable rotational freedom. Similarly, the edge of each nesting plate 23 cooperates with the corresponding limiting circular rail 221. Each nesting plate 23 is provided with a limiting protrusion 25 and a limiting groove 26, which respectively cooperate with the limiting groove 26 and the limiting protrusion 25 on the adjacent nesting plate 23 to ensure that the top plate 24, the nesting plate 23 and the bottom plate 22 are tightly matched.

[0077] Embodiment 2

[0078] Figure 7 It is a flow chart of a control method for a range hood provided in the second embodiment of the present invention. The method can be applied to the control of the range hood. The method can be executed by a control device for the range hood, wherein the device can be implemented by software and / or hardware and is generally integrated on the control device of the range hood.

[0079] like Figure 7 As shown, a control method for a range hood provided in Embodiment 2 of the present invention comprises the following steps:

[0080] S110, obtaining the current oil smoke information to be absorbed.

[0081] For details, please refer to Figure 1 A windshield plate 20 is provided in the air inlet channel 10 of the range hood, and the expansion area of ​​the windshield plate 20 is adjustable. Therefore, it is necessary to obtain the current information of the oil fume to be absorbed, so as to adjust the expansion area of ​​the windshield plate 20 according to the current amount of oil fume to be absorbed, thereby adjusting the air suction efficiency.

[0082] S120. According to the current information of the oil smoke to be absorbed, the unfolded area of ​​the wind shield plate is adjusted to adjust the air intake area of ​​the air intake channel; wherein the air intake area of ​​the air intake channel is inversely proportional to the air intake efficiency.

[0083] Specifically, since the air intake area of ​​the air intake channel 10 determines the air intake efficiency, for example, when there is a lot of oil smoke to be absorbed, the suction efficiency needs to be increased. Therefore, the expansion area of ​​the wind shield plate 20 can be adjusted to expand the wind shield plate 20, thereby reducing the air intake area of ​​the air intake channel 10, thereby increasing the suction wind pressure and increasing the suction efficiency to absorb the current oil smoke.

[0084] A control method for a range hood provided in the second embodiment of the present invention comprises a windshield plate in the air inlet channel of the range hood, and the deployment area of ​​the windshield plate is adjustable; the method first obtains the current information of the oil smoke to be absorbed; then, according to the current information of the oil smoke to be absorbed, the deployment area of ​​the windshield plate is adjusted to adjust the air inlet area of ​​the air inlet channel; wherein the air inlet area of ​​the air inlet channel is inversely proportional to the air inlet efficiency. The above method solves the problem that when the existing range hood adjusts the air suction efficiency, increasing the power of the fan will cause a large noise that affects the user experience. By adjusting the deployment area of ​​the windshield plate to adjust the air inlet area of ​​the air inlet channel, the air inlet efficiency is adjusted without causing noise interference, thereby improving the user experience.

[0085] Based on the above embodiment, a variant embodiment of the above embodiment is proposed. It should be noted that in order to make the description concise, only the differences from the above embodiment are described in the variant embodiment.

[0086] In one embodiment, after obtaining the current oil fume information to be absorbed in step S110, before adjusting the deployment area of ​​the windshield plate to adjust the air intake area of ​​the air intake channel in step S120, the method further includes:

[0087] It is determined whether the current oil fume information to be absorbed is greater than the preset oil fume information to be absorbed, and when the current oil fume information to be absorbed is greater than the preset oil fume information to be absorbed, the rotation speed of the fan in the range hood is increased to increase the exhaust efficiency of the range hood.

[0088] Specifically, the preset oil fume information to be absorbed can be understood as the oil fume information set according to the maximum amount of oil fume that the range hood can currently absorb. When the current oil fume information to be absorbed is greater than the preset oil fume information to be absorbed, it indicates that the range hood cannot meet the current oil fume demand. Therefore, it is necessary to increase the speed of the fan in the range hood to increase the exhaust efficiency of the range hood.

[0089] After increasing the speed of the fan in the range hood to increase the smoke extraction efficiency of the range hood, the following are also added:

[0090] Detect the wind speed at the range hood outlet;

[0091] When the wind speed is greater than the preset wind speed, the fan speed is reduced by a preset ratio.

[0092] Specifically, the wind speed at the hood outlet reflects the noise level of the hood, that is, increasing the wind speed to increase the smoking efficiency will also increase the noise. Therefore, it is necessary to detect the wind speed at the outlet. When the wind speed is greater than the preset wind speed, it is determined that the noise is large and the fan speed needs to be reduced. Figure 2 , the range hood wind speed can be measured at the wind speed monitoring point P; illustratively, the preset ratio can be 5% of the rated wind speed.

[0093] Embodiment 3

[0094] Figure 8 1 is a flow chart of a control method of a range hood provided in the third embodiment of the present invention. The third embodiment is optimized on the basis of the above embodiments. In this embodiment, the above step S110, obtaining the current oil smoke information to be absorbed, is specifically implemented as follows:

[0095] Using an image sensor, obtaining the current image of the oil smoke to be absorbed;

[0096] In the current oil smoke image to be absorbed, identifying the contour of the current oil smoke to be absorbed;

[0097] The above step S120, adjusting the deployment area of ​​the wind shield plate of the range hood according to the current oil fume information to be absorbed, is specifically implemented as follows:

[0098] Adjust the deployment area of ​​the range hood wind shield according to the contour area of ​​the current oil smoke to be absorbed.

[0099] Before adjusting the deployment area of ​​the hood wind shield according to the contour area of ​​the current oil smoke to be absorbed, the following is added:

[0100] It is determined that the contour area of ​​the current oil smoke to be absorbed is larger than the preset area.

[0101] For details not yet provided in this embodiment, please refer to the above embodiments.

[0102] like Figure 8 As shown, a control method for a range hood provided in Embodiment 3 of the present invention comprises the following steps:

[0103] S210: Using an image sensor, obtain the current image of the oil smoke to be absorbed.

[0104] For details, please refer to Figure 2 The range hood includes an image sensor 30, which is arranged on the outside of the air inlet of the range hood, and the image sensor 30 is at the center of the range hood in the horizontal direction, that is, the image sensor 30 is located at the center of the range hood, so that accurate oil fume information can be obtained.

[0105] S220 , identifying the outline of the oil fume to be absorbed in the current oil fume image.

[0106] S230: Determine whether the contour area of ​​the oil smoke to be absorbed is larger than a preset area.

[0107] The preset area can be understood as the contour area of ​​the amount of oil smoke that the range hood can currently absorb; Figure 2 When the contour area 31 of the oil fume to be absorbed is larger than the preset contour area 32, it indicates that the amount of oil fume to be absorbed exceeds the amount of oil fume that the range hood can absorb at this time and needs to be adjusted.

[0108] S240, adjusting the deployment area of ​​the air shield of the range hood according to the contour area of ​​the current oil smoke to be absorbed.

[0109] For example, when the contour area of ​​the oil fume to be absorbed is larger than the preset area, it is determined that the oil fume to be absorbed is large and the current smoke intake of the range hood cannot be met. Therefore, it is necessary to adjust the unfolded area of ​​the windshield plate 20 of the range hood. The area of ​​the windshield plate 20 is increased, thereby reducing the area of ​​the air inlet channel 10 and improving the smoking efficiency.

[0110] It should be added that the above control method is mainly aimed at the situation where the contour area 31 of the oil fume to be absorbed is larger than the preset area 32, that is, the concentration of the oil fume to be absorbed is too large. When the contour area of ​​the oil fume to be absorbed is smaller than the preset area 32, it means that the current smoke exhaust efficiency of the range hood can meet the current oil fume emission demand, so the expanded area of ​​the wind shield 20 does not need to be adjusted, that is, the state of the wind shield 20 can be kept unchanged.

[0111] For Figure 3 The wind shield shown in the figure can optionally adjust the deployment area of ​​the wind shield of the range hood according to the current oil fume information to be absorbed, including:

[0112] According to the current information of oil smoke to be absorbed, the rotary motor is driven to rotate at a preset angle step, and the deployment area of ​​the wind shield plate is adjusted at a preset area step.

[0113] Specifically, in the initial state of the wind shield plate 20, each plate layer is in an overlapping state. When the wind shield plate 20 is controlled to be gradually unfolded according to the current information of the oil smoke to be absorbed, the rotating motor 21 is first driven to rotate at a preset angle step. When the rotating motor 21 rotates, it drives the top plate 24 rotatably connected to it to rotate. During the rotation of the top plate 24, the limiting protrusion 25 fixedly connected to it also rotates in the limiting groove 26 of the next layer of nested plate 23 until it rotates to the extreme position of the limiting groove 26. At this time, the next layer of nested plate 23 will also be driven and rotated, thereby gradually increasing the unfolding area of ​​the wind shield plate 20.

[0114] The technical solution of the embodiment of the present invention is to set a wind shield with a multi-layer nested structure, and use the image sensor to identify the smoke and adjust the rotation angle of the motor to adjust the effective air inlet cross-section of the range hood fan air inlet channel, automatically adjust the suction air pressure of the range hood, thereby achieving the effect of improving smoking efficiency.

[0115] Embodiment 4

[0116] Fig. 9 This is a flowchart of a smoke machine provided by the fourth embodiment of the present invention, referring to Figure 1-Figure 6 as well as Fig. 9First of all, it should be noted that in this embodiment, an AI image recognition monitoring probe, namely, an image sensor 30, is provided on the front side of the desktop range hood. The AI ​​image probe can identify the three-dimensional information of smoke in a certain area, store the smoke information in the form of a three-dimensional smoke information matrix, and analyze it in real time. A wind speed monitoring point P is set in the range hood outlet area. The speed information of the monitoring point P is used to reflect the noise of the range hood. The greater the outlet speed of the range hood, the greater the noise of the range hood. The remaining structures can refer to the above-mentioned embodiment 1, and will not be repeated here.

[0117] Reference below Fig. 9 , the actual working process of the range hood provided by this embodiment is introduced: first, the range hood is turned on, and the AI ​​image probe identifies the three-dimensional panoramic information matrix of the smoke information. If the matrix is ​​not greater than the three-dimensional smoke matrix that the range hood can process, that is, the smoke information is not greater than the preset smoke information, then the current range hood state is maintained; if the matrix is ​​greater than the three-dimensional smoke matrix that the range hood can process, then the fan speed of the desktop range hood is increased, and the outlet wind speed of the range hood is measured (the outlet wind speed of the range hood can reflect the working noise of the range hood). If the outlet wind speed of the range hood is not greater than the critical set wind speed, then return to identify the three-dimensional panoramic information matrix of the smoke through the AI ​​image probe again; otherwise, immediately reduce the fan speed by 5% to achieve the purpose of reducing the noise of the range hood. At this time, the rotating motor starts to work and rotates by a preset angle to reduce the effective air intake area of ​​the fan inlet of the range hood. The AI ​​image probe continues to identify the three-dimensional panoramic information matrix of the smoke. If the smoke information is not greater than the three-dimensional smoke matrix that the range hood can process, then the current range hood state is maintained; otherwise, the rotation angle a of the rotating motor is read. If the motor's rotation angle is greater than the rotatable angle, that is, the set maximum angle, the current range hood state is maintained; otherwise, the motor is controlled to continue rotating at the preset angle, further reducing the effective air intake area of ​​the range hood fan inlet. While maintaining the current range hood state, it continuously detects whether a shutdown signal is received. If a shutdown signal is received, the power is cut off after a delay of 2 minutes, the range hood is turned off, and the rotation angle of the motor is reset.

[0118] Embodiment 5

[0119] Fig.10 It is a structural schematic diagram of a control device for a range hood provided in Embodiment 5 of the present invention. The device can be applicable to the control of the range hood, wherein the device can be implemented by software and / or hardware and is generally integrated on the control device of the range hood.

[0120] like Fig.10 As shown, the device comprises:

[0121] The oil fume information acquisition module 410 is used to acquire the current oil fume information to be absorbed;

[0122] The area adjustment module 420 is used to adjust the deployment area of ​​the windshield according to the current information of the oil smoke to be absorbed, so as to adjust the air intake area of ​​the air inlet; wherein the air intake area of ​​the air inlet is inversely proportional to the air intake efficiency.

[0123] In this embodiment, the device first obtains the current oil fume information to be absorbed through the oil fume information acquisition module; then, according to the current oil fume information to be absorbed, the area adjustment module adjusts the deployment area of ​​the windshield plate to adjust the air intake area of ​​the air inlet. The above technical solution solves the problem that when the existing range hood adjusts the air suction efficiency, increasing the power of the fan will cause a lot of noise and affect the user experience. By adjusting the deployment area of ​​the windshield plate to adjust the air intake area of ​​the air inlet, the air intake efficiency is adjusted without causing noise interference, thereby improving the user experience.

[0124] like Figure 2 As shown, optionally, the range hood further includes an image sensor 30; the image sensor 30 is arranged on the outside of the air inlet of the range hood, and the image sensor 30 is located at the center of the range hood in the horizontal direction.

[0125] Based on this, the module 410 for acquiring the oil smoke information to be absorbed may specifically include:

[0126] The oil fume image acquisition unit to be absorbed is used to acquire the current oil fume image to be absorbed by using an image sensor;

[0127] The oil fume contour recognition unit to be absorbed is used to recognize the contour of the oil fume to be absorbed in the current oil fume image to be absorbed.

[0128] Therefore, the area adjustment module 420 is specifically used to:

[0129] Adjust the deployment area of ​​the range hood wind shield according to the contour area of ​​the current oil smoke to be absorbed.

[0130] Optionally, the device further comprises an area determination module for determining that the contour area of ​​the oil fume to be absorbed is greater than a preset area before adjusting the deployment area of ​​the hood wind shield plate according to the contour area of ​​the oil fume to be absorbed.

[0131] like Figure 3 As shown, specifically, the windshield 20 may include a rotating motor 21, a bottom plate 22, a multi-layer nested plate 23 and a top plate 24 stacked in sequence along a first direction; the first direction is a wind suction direction; the bottom plate 22, the nested plate 23 and the top plate 24 all have openings and their projections in the first direction overlap before being unfolded;

[0132] The rotary motor 21 is used to drive any two adjacent bottom plates 22 , multi-layer nested plates 23 and top plates 24 stacked in sequence to rotate relative to each other so as to cover each other's openings and change the unfolding area of ​​the windshield 20 .

[0133] Based on this, the area adjustment module 420 is specifically used to:

[0134] According to the current information of oil smoke to be absorbed, the rotary motor is driven to rotate at a preset angle step, and the deployment area of ​​the wind shield plate is adjusted at a preset area step.

[0135] Optionally, the device also includes an angle determination module, which is used to determine that the current rotation angle of the rotating motor is less than an angle threshold before driving the rotating motor to rotate at a preset angle step size according to the current oil fume information to be absorbed and adjusting the deployment area of ​​the wind shield at a preset area step size.

[0136] Optionally, the device also includes a fan adjustment module, which is used to determine whether the current oil fume information to be absorbed is greater than the preset oil fume information to be absorbed after obtaining the current oil fume information to be absorbed and before adjusting the expansion area of ​​the wind shield plate to adjust the air inlet area of ​​the air inlet channel; and when the current oil fume information to be absorbed is greater than the preset oil fume information to be absorbed, increase the rotation speed of the fan in the range hood to increase the exhaust efficiency of the range hood.

[0137] Furthermore, the device also includes:

[0138] The wind speed detection module is used to detect the wind speed at the air outlet of the range hood after increasing the speed of the fan in the range hood to increase the smoking efficiency of the range hood;

[0139] Therefore, the fan adjustment module is also used to reduce the fan speed by a preset ratio when the wind speed is greater than a preset wind speed.

[0140] The above-mentioned range hood control device can execute the range hood control method provided by any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0141] Embodiment 6

[0142] Fig.11 Schematic diagram of the structure of a range hood provided by Embodiment 6 of the present invention. Fig.11 As shown, the range hood provided by the fifth embodiment of the present invention comprises: one or more processors 51 and a storage device 52; the processor 51 in the range hood may be one or more, Fig.11 A processor 51 is taken as an example; the storage device 52 is used to store one or more programs; the one or more programs are executed by one or more processors 51, so that one or more processors 51 implement the control method of the range hood as any one of the embodiments of the present invention.

[0143] The range hood may further include: an input device 53 and an output device 54 .

[0144] The processor 51, storage device 52, input device 53 and output device 54 in the range hood can be connected via a bus or other means. Fig.10 The example of connecting through bus is taken in the following.

[0145] The storage device 52 in the range hood is a computer-readable storage medium that can be used to store one or more programs, which can be software programs, computer executable programs, and modules, such as program instructions / modules corresponding to the range hood control methods provided in various embodiments of the present invention. The processor 51 executes various functional applications and data processing of the range hood by running the software programs, instructions, and modules stored in the storage device 52, that is, realizing the range hood control method in the above method embodiment.

[0146] The storage device 52 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and at least one application required for a function; the data storage area may store data created according to the use of the range hood, etc. In addition, the storage device 52 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some examples, the storage device 52 may further include a memory remotely arranged relative to the processor 51, and these remote memories may be connected to the range hood via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0147] The input device 53 may be used to receive input digital or character information and generate key signal input related to user settings and function control of the range hood. The output device 54 may include display devices such as a display screen.

[0148] Furthermore, when one or more programs included in the above range hood are executed by one or more processors 51, the programs perform the following operations:

[0149] Get the current oil smoke information to be absorbed;

[0150] According to the current information of the oil smoke to be absorbed, the unfolded area of ​​the wind shield is adjusted to adjust the air intake area of ​​the air inlet; wherein, the air intake area of ​​the air inlet is inversely proportional to the air intake efficiency.

[0151] Embodiment 7

[0152] Embodiment 7 of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is used to execute a control method for a range hood, the method comprising: obtaining current information on oil fumes to be absorbed; adjusting the deployment area of ​​a wind shield plate to adjust an air intake area of ​​an air inlet according to the current information on oil fumes to be absorbed; wherein the air intake area of ​​the air inlet is inversely proportional to the air intake efficiency.

[0153] Optionally, when the program is executed by a processor, it can also be used to execute the control method of the range hood provided by any embodiment of the present invention.

[0154] The computer storage medium of the embodiment of the present invention may adopt any combination of one or more computer-readable media. The computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination thereof. More specific examples (non-exhaustive list) of computer-readable storage media include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (AM), a read-only memory (OM), an erasable programmable read-only memory (EPOM), a flash memory, an optical fiber, a portable CD-OM, an optical storage device, a magnetic storage device, or any suitable combination thereof. The computer-readable storage medium may be any tangible medium containing or storing a program, which may be used by an instruction execution system, device or device or used in combination therewith.

[0155] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, which carry computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to: electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0156] The program code contained on the computer-readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, optical cable, radio frequency (RF), etc., or any suitable combination of the above.

[0157] Computer program code for performing the operations of the present invention may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0158] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A range hood, characterized in that: The range hood comprises an air inlet channel (10); A windshield plate (20) is arranged in the air inlet channel (10); the deployment area of ​​the windshield plate (20) is adjustable.

2. The range hood according to claim 1, characterized in that: The range hood further comprises an image sensor (30); the image sensor (30) is arranged outside the air inlet of the range hood, and the image sensor (30) is located at the center of the range hood in the horizontal direction.

3. The range hood according to claim 1, characterized in that: The wind shield plate (20) comprises a rotating motor (21), a bottom plate (22), a plurality of nested plates (23) and a top plate (24) stacked in sequence along a first direction; the first direction is a wind suction direction; the bottom plate (22), the nested plates (23) and the top plate (24) all have openings and their projections in the first direction overlap before they are unfolded; The rotating motor (21) is used to drive any two adjacent ones of the sequentially stacked bottom plates (22), the multiple layers of nested plates (23) and the top plates (24) to rotate relative to each other, so as to shield each other's openings and change the unfolded area of ​​the windshield plate (20).

4. The range hood according to claim 3, characterized in that: The top plate (24) and the multi-layer nested plates (23) are both provided with limiting protrusions (25) at the edge positions of the surfaces on one side facing the bottom plate (22), and the multi-layer nested plates (23) and the bottom plate (22) are both provided with limiting grooves (26) for the limiting protrusions (25) to move along the rotation direction, and the limiting protrusions (25) are placed in the limiting grooves (26) of the next plate layer; A transmission protrusion (211) is arranged on the motor shaft (212) of the rotating motor (21), and a transmission groove (241) is arranged at the center of the top plate (24). The transmission protrusion (211) of the motor shaft (212) is in transmission connection with the transmission groove (241) of the top plate (24). The rotating motor (21) drives the top plate (24) to rotate, thereby driving the limit protrusion (25) of the top plate (24) to rotate, so that the limit protrusion (25) rotates to the limit position of the limit groove (26) of the next plate layer, thereby driving the next plate layer to rotate.

5. The range hood according to claim 4, characterized in that: The bottom plate (22) comprises a limiting circular ring rail (221), a nesting plate movement limiting groove (222), a motor fixing hole (223) and a motor shaft through hole (224); The edges of the top plate (24) and the nesting plate (23) are both embedded in the limiting circular ring rail (41); The limiting protrusion (25) on the nesting plate (23) close to the bottom plate (22) is placed in the nesting plate movement limiting groove (222) on the bottom plate (22); The motor shaft (212) of the rotating motor (21) passes through the motor shaft through-hole (224), and the rotating motor (21) is fixed to the bottom plate (22) via the motor fixing hole (223).

6. The range hood according to claim 4, characterized in that: The top plate (24) also includes a motor shaft matching recess (242) and a rotation limiting protrusion (243); The transmission groove (241) is arranged in the motor shaft matching recess (242), and the end of the motor shaft (212) of the rotating motor (21) extends into the transmission groove (241) to be transmission-connected with the motor shaft matching recess (242); The rotation limiting protrusion (243) is placed in the limiting groove (26) on the nesting plate (23) close to the top plate (24).

7. A method for controlling a range hood, characterized in that: A windshield plate (20) is provided in the air inlet channel (10) of the range hood, and the deployment area of ​​the windshield plate (20) is adjustable; The control method includes: Get the current oil smoke information to be absorbed; According to the current oil fume information to be absorbed, the unfolded area of ​​the wind shield plate (20) is adjusted to adjust the air intake area of ​​the air intake channel (10); wherein the air intake area of ​​the air intake channel (10) is inversely proportional to the air intake efficiency.

8. The control method according to claim 7, characterized in that: The range hood comprises an image sensor (30), the image sensor (30) being arranged outside an air inlet of the range hood, and the image sensor (30) being located at a central position of the range hood in a horizontal direction; The obtaining of the current oil smoke information to be absorbed includes: Utilizing the image sensor (30) to acquire the current image of the oil smoke to be absorbed; In the current oil fume image to be absorbed, identifying the outline of the current oil fume to be absorbed; The step of adjusting the deployment area of ​​the range hood wind shield plate (20) according to the current information of the oil smoke to be absorbed comprises: The unfolded area of ​​the hood windshield plate (20) is adjusted according to the contour area of ​​the oil smoke to be currently absorbed.

9. The control method according to claim 8, characterized in that: Before adjusting the deployment area of ​​the hood wind shield plate (20) according to the contour area of ​​the current fumes to be absorbed, the method further comprises: It is determined that the contour area of ​​the current oil smoke to be absorbed is larger than a preset area.

10. The control method according to claim 7, characterized in that: The wind shield plate (20) comprises a rotating motor (21), a bottom plate (22), a plurality of nested plates (23) and a top plate (24) stacked in sequence along a first direction; the first direction is a wind suction direction; the bottom plate (22), the nested plates (23) and the top plate (24) all have openings and their projections in the first direction overlap before they are unfolded; The rotating motor (21) is used to drive any two adjacent ones of the sequentially stacked bottom plates (22), the multiple layers of nested plates (23) and the top plates (24) to rotate relative to each other, so as to shield each other's openings and change the unfolded area of ​​the wind shield plate (20); The step of adjusting the deployment area of ​​the range hood wind shield plate (20) according to the current information of the oil smoke to be absorbed comprises: According to the current oil fume information to be absorbed, the rotating motor (21) is driven to rotate at a preset angle step length, and the unfolded area of ​​the wind shield plate (20) is adjusted at a preset area step length.

11. The control method according to claim 10, characterized in that: Before driving the rotary motor (21) to rotate at a preset angle step length according to the current oil fume information to be absorbed and adjusting the deployment area of ​​the windshield plate (20) at a preset area step length, the method further comprises: It is determined that the current rotation angle of the rotating motor (21) is less than an angle threshold.

12. The control method according to claim 7, characterized in that: After obtaining the current oil fume information to be absorbed, and before adjusting the deployment area of ​​the wind shield plate (20) to adjust the air intake area of ​​the air intake channel (10), the method further includes: It is determined whether the current oil fume information to be absorbed is greater than the preset oil fume information to be absorbed, and when the current oil fume information to be absorbed is greater than the preset oil fume information to be absorbed, the rotation speed of the fan in the range hood is increased to increase the smoke extraction efficiency of the range hood.

13. The control method according to claim 12, characterized in that: After increasing the rotation speed of the fan in the range hood to increase the smoking efficiency of the range hood, the method further includes: Detecting the wind speed at the air outlet of the range hood; When the wind speed is greater than a preset wind speed, the fan speed is reduced by a preset ratio.

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