A range hood and a control method thereof

Abstract

The application relates to the technical field of range hood, in particular to a range hood and a control method thereof. The range hood comprises a smoke collecting hood, an oil screen and a wind volume adjusting mechanism. The left side air inlet and the right side air inlet are arranged in communication below the smoke collecting hood. The oil screen comprises a left side oil screen and a right side oil screen. The left side oil screen is arranged at the left side air inlet, and the right side oil screen is arranged at the right side air inlet. The wind volume adjusting mechanism is arranged on the left side oil screen and the right side oil screen. The wind volume adjusting mechanism comprises a wind blocking piece and a driving assembly in transmission connection. A plurality of smoke outlets are arranged on the oil screen, and the wind blocking piece is arranged in one-to-one correspondence with the smoke outlets. The driving assembly can drive the wind blocking piece to rotate, and then drive the wind blocking piece to make opening and closing movement relative to the smoke outlets, so that the smoke outlets on the left side oil screen and the right side oil screen are shielded and opened, the opening and closing angle of the wind blocking piece relative to the smoke outlets is adjusted, and the flow of the left and right air inlets of the range hood is adjusted.

Description

Technical Field

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

[0002] Range hoods have become an indispensable kitchen appliance in modern homes. They use a centrifugal fan installed inside to draw in and exhaust cooking fumes, and a filter to remove some grease particles. Range hoods are mainly top-mounted and side-mounted. Side-mounted range hoods, in particular, are increasingly favored by Chinese families due to their superior extraction efficiency, side airflow, and the fact that they prevent head bumps.

[0003] Many users often only use one side of the stove during cooking, or one side is used for stir-frying while the other side is used for simmering soup. Existing range hoods cannot adjust the airflow on both sides according to the usage of the stove or the difference in the amount of oil fumes produced, so as to match the user's cooking situation.

[0004] Therefore, there is a need to provide an improved range hood and its control method to solve at least one of the aforementioned problems of the prior art. Summary of the Invention

[0005] To address the problems existing in the prior art, this application provides a range hood and its control method. The range hood includes a smoke collection hood, an oil filter, and an airflow regulating mechanism. A left air inlet and a right air inlet are connected and disposed below the smoke collection hood. The oil filter includes a left oil filter and a right oil filter, with the left oil filter located at the left air inlet and the right oil filter located at the right air inlet. The airflow regulating mechanism is provided on both the left and right oil filters. The airflow regulating mechanism includes a wind deflector and a drive assembly connected by a transmission connection. Multiple exhaust ports are provided on the oil filter, with the wind deflector corresponding to each exhaust port. The drive assembly can drive the wind deflector to rotate, thereby causing the wind deflector to open and close relative to the exhaust ports.

[0006] Furthermore, the drive assembly includes a drive motor, a movable rack, and a rotating gear; the movable rack and the rotating gear mesh with each other, and one end of the wind deflector is connected to the rotating gear; the drive motor can drive the movable rack to move, and the rotating gear meshes with the movable rack to rotate, thereby driving the wind deflector to rotate.

[0007] Furthermore, the drive assembly also includes a lead screw and a connecting block; the connecting block is threadedly connected to the lead screw, and one end of the connecting block is fixedly connected to the movable rack; the output shaft of the drive motor is connected to the lead screw, and under the drive of the drive motor, the connecting block can drive the movable rack to move along the direction of the lead screw.

[0008] Furthermore, the air volume regulating mechanism also includes a mounting base, on which a sliding groove is provided, and the movable rack can reciprocate along the sliding groove.

[0009] Furthermore, the air volume regulating mechanism also includes a limiting baffle; the limiting baffle is provided with a connecting hole, and one end of the windproof component is movably connected to the connecting hole.

[0010] Furthermore, the airflow regulating mechanism also includes a connecting shaft, the wind deflector is fixed on the connecting shaft, one end of the connecting shaft is fixedly connected to the rotating shaft of the rotating gear, and the other end of the connecting shaft is movably connected in the connecting hole.

[0011] Furthermore, the windshield is designed to mimic the shape of the smoke exhaust port.

[0012] Furthermore, the smoke hood includes a rear top plate, a support plate is fixedly installed on one side of the rear top plate, an air inlet can be formed between the rear top plate and the support plate, and the air volume adjustment mechanism is fixed on the rear top plate and the support plate.

[0013] This application also provides a control method for a range hood, applied to the range hood described above, the control method comprising the following steps: 1) the range hood is started and operates at the default setting;

[0014] 2) Read the current oil fume concentration y on the left side. a And the oil fume concentration on the right side y b ;

[0015] 3) Determine y a and y b The relationship between the larger values ​​and the preset threshold is analyzed, and corresponding controls are implemented based on the comparison results.

[0016] 3.1) If y a >y b Determine y a With y f The size relationship between them should be controlled accordingly based on the comparison results;

[0017] 3.1.1) If y a >y f Then the range hood system can issue a pre-alarm error signal;

[0018] 3.1.2) If y a <y f The range hood system needs to collect the oil fume concentration n times within a preset time. If 80% of the results are less than y... f If the result is greater than y, then continue cooking normally. f Then the range hood system can issue a pre-alarm error signal;

[0019] 4) Determine y a With y b The relationship between the difference and the preset concentration difference threshold is used to make corresponding controls based on the comparison results;

[0020] 4.1) If Δy1 < Δy a This indicates that the concentration difference is in the low concentration range, and then for y a With y b Compare the results and implement appropriate controls accordingly.

[0021] 4.1.1) If y a <y b Then, control the drive motor at the right oil screen to rotate the wind deflector to the first preset angle, and at the same time control the drive motor at the left oil screen to rotate the wind deflector to the second preset angle.

[0022] 4.1.2) If y a >y b Then, control the drive motor at the left oil screen to rotate the wind deflector to the first preset angle, and at the same time control the drive motor at the right oil screen to rotate the wind deflector to the second preset angle.

[0023] 4.2) If Δy a <Δy1<Δy b This indicates that the concentration difference is within the intermediate concentration range. Then, regarding y... a With y b Compare the results and implement appropriate controls accordingly.

[0024] 4.2.1) If y a <y b Then, control the drive motor at the right oil screen to rotate the wind deflector to the third preset angle, and at the same time control the drive motor at the left oil screen to rotate the wind deflector to the fourth preset angle.

[0025] 4.2.2) If y a >y b Then, control the drive motor at the left oil screen to rotate the wind deflector to the third preset angle, and at the same time control the drive motor at the right oil screen to rotate the wind deflector to the fourth preset angle;

[0026] 4.3) If Δy b <Δy1 <y f This indicates that the concentration difference is in the high concentration range, and then for y a With y b Compare the results and implement appropriate controls accordingly.

[0027] 4.3.1) If y a <y b Then, control the drive motor at the right oil screen to rotate the wind deflector to the fifth preset angle, and at the same time control the drive motor at the left oil screen to rotate the wind deflector to the sixth preset angle.

[0028] 4.3.2) If y a >y b Then, control the drive motor at the left oil screen to rotate the wind deflector to the fifth preset angle, and at the same time control the drive motor at the right oil screen to rotate the wind deflector to the sixth preset angle.

[0029] 4.4) If Δy1>y f Then return to step 3).

[0030] Furthermore, after step 1) where the range hood is started and operates at the default setting, the following steps are also included:

[0031] Determine whether both the left and right stoves are on.

[0032] If not, when the stove on the left is not lit, control the drive motor on the left to rotate the baffle until it engages with the exhaust port;

[0033] When the stove on the right is not lit, the drive motor on the right will be controlled to rotate the baffle until it engages with the exhaust port.

[0034] If so, return to step 2).

[0035] The range hood provided in this application has at least the following technical effects:

[0036] This application's range hood includes a smoke collection hood, an oil filter, and an airflow adjustment mechanism. The bottom of the smoke collection hood is connected to a left-side air inlet and a right-side air inlet. The oil filter includes a left-side oil filter and a right-side oil filter, with the left-side oil filter located at the left-side air inlet and the right-side oil filter located at the right-side air inlet. Both the left-side and right-side oil filters are equipped with airflow adjustment mechanisms. Each airflow adjustment mechanism includes a wind deflector and a drive assembly connected by a transmission. Multiple exhaust vents are provided on the oil filter, with each wind deflector corresponding to one of the exhaust vents. The drive assembly can drive the wind deflector to rotate, thereby causing the wind deflector to open and close relative to the exhaust vents. This achieves the shielding and opening of the exhaust vents on the left and right oil filters, adjusting the opening and closing angle of the wind deflector relative to the exhaust vents, thus regulating the airflow at the left and right air inlets of the range hood. Attached Figure Description

[0037] To more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 : A schematic diagram of the overall structure of the range hood provided in this embodiment of the invention;

[0039] Figure 2 : A cross-sectional view of the range hood provided in the embodiment of the present invention;

[0040] Figure 3 : A schematic diagram of the structure of a range hood from another perspective provided in an embodiment of the present invention;

[0041] Figure 4 : A schematic diagram of the air volume adjustment mechanism and the smoke hood in cooperation with each other according to an embodiment of the present invention;

[0042] Figure 5 : A schematic diagram of the overall structure of the air volume regulating mechanism provided in this embodiment of the invention;

[0043] Figure 6 : Figure 5 Enlarged view of some of the structures in the image;

[0044] Figure 7 : A schematic diagram of the structure of some driving components provided in the embodiments of the present invention;

[0045] Figure 8 : A schematic diagram of the assembly state of the windbreak component and the rotating gear provided in the embodiment of the present invention;

[0046] Figure 9 A partial structural schematic diagram of the movable rack provided in this embodiment of the invention;

[0047] Figure 10 : A schematic diagram of the air volume regulating mechanism and the oil filter installation state provided in this embodiment of the invention;

[0048] Figure 11 The control flowchart of the range hood control method provided in this embodiment of the invention;

[0049] In the diagram: 1-Smoke hood, 2-Oil screen, 3-Airflow adjustment mechanism, 4-Main body of the smoke hood, 5-Fan, 11-Rear top plate, 12-Bracket plate, 13-Opening and closing door device, 21-Left side oil screen, 22-Right side oil screen, 23-Smoke exhaust port, 31-Drive assembly, 32-Wind baffle, 33-Mounting base, 34-Limit baffle, 35-Connecting shaft, 131-Opening and closing door, 132-Transmission mechanism, 311-Drive motor, 312-Movable rack, 313-Rotating gear, 314-Lead screw, 315-Connecting block, 331-Sliding groove, 341-Connecting hole. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, apparatus, product, or device that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0052] The embodiments are described below with reference to the accompanying drawings, which do not limit the scope of the invention as described in the claims.

[0053] Please refer to Figure 1-10This disclosure provides a range hood, including a smoke collection hood 1, an oil filter 2, and an airflow regulating mechanism 3. The smoke collection hood 1 has a left air inlet and a right air inlet connected at its lower part. The oil filter 2 includes a left oil filter 21 and a right oil filter 22. The left oil filter 21 is located at the left air inlet, and the right oil filter 22 is located at the right air inlet. Both the left oil filter 21 and the right oil filter 22 are provided with airflow regulating mechanisms 3. The airflow regulating mechanism 3 includes a wind deflector 32 and a drive assembly 31 connected by a transmission. The oil filter 2 is provided with multiple exhaust ports 23, and the wind deflector 32 is provided with one exhaust port 23 in correspondence with each exhaust port 23. The drive assembly 31 can be used to drive the wind deflector 32 to rotate, thereby causing the wind deflector 32 to open and close relative to the exhaust ports 23.

[0054] Specifically, the upper part of the fume hood 1 is connected to the main body of the range hood 4, and the main body of the range hood 4 is equipped with a fan 5. As the fan 5 rotates, the negative pressure generated can draw the outside smoke into the fume hood 1, and then discharge it through the exhaust pipe above the main body of the range hood 4, thereby reducing the impact of smoke on the kitchen air environment.

[0055] Specifically, the smoke hood 1 is also provided with an opening and closing door device 13. The opening and closing door device 13 includes an opening and closing door 131 and a transmission mechanism 132 connected by transmission. The transmission mechanism 132 is fixedly installed on the side of the air inlet. The transmission mechanism 132 can drive the opening and closing door 131 to rotate, thereby causing the opening and closing door 131 to close or open relative to the air inlet.

[0056] Furthermore, the control device is communicatively connected to the door opening and closing device 13. When the range hood is running, the control device controls the transmission mechanism 132 to drive the door opening and closing device 131 to rotate to the open position. When the range hood is closed, the control device controls the transmission mechanism 132 to drive the door opening and closing device 131 to rotate to the closed position.

[0057] Furthermore, a first oil fume sensor is installed at the left air inlet and a second oil fume sensor is installed at the right air inlet. The first oil fume sensor is used to collect the first oil fume concentration information at the left air inlet and send it to the control device. The second oil fume sensor is used to collect the second oil fume concentration information at the right air inlet and send it to the control device.

[0058] The control device is used to respond to the first oil fume concentration information and the second oil fume concentration information, control the corresponding air volume adjustment mechanism 3 to start, and control the corresponding drive component 31 to drive the wind deflector 32 to rotate, thereby controlling the opening and closing angle of the wind deflector 32 relative to the exhaust port 23.

[0059] Thus, in this embodiment, airflow adjustment mechanisms 3 are provided at both the left and right air inlets. These mechanisms allow for independent control of the airflow at each inlet. Specifically, the corresponding drive assembly 31 rotates the baffle 31, adjusting the opening angle of the baffle 32 relative to the exhaust port 23. This achieves the shielding and opening of the exhaust ports on the left and right oil screens, adjusting the opening angle of the baffle 32 relative to the exhaust port 23, thereby regulating the airflow at the left and right air inlets of the range hood. This solves the problem that traditional range hoods cannot adjust the airflow at the inlets due to the large difference in smoke volume generated when cooking with two stoves.

[0060] In some preferred embodiments, the left oil mesh 21 and the right oil mesh 22 have the same structure, and each oil mesh is provided with fifteen exhaust ports 23. Each exhaust port 23 is provided with a corresponding wind baffle 31. The wind baffle 31 is driven to rotate by the drive component 31, thereby adjusting the opening and closing angle of the wind baffle 32 relative to the exhaust port 23, thus realizing the adjustment of the air intake volume of the left and right air inlets of the range hood.

[0061] Specifically, the wind deflector 32 can be a sheet-like structure, and its size is adapted to the smoke exhaust port 23.

[0062] Specifically, the rotation axis of the wind deflector 32 is located on one side of the wind deflector 32 and close to one end of the smoke exhaust port 23. In the initial state, the wind deflector 32 is perpendicular to the plane where the smoke exhaust port 23 is located. At this time, the wind deflector 32 and the smoke exhaust port 23 are at 90°, and the smoke exhaust port 23 is in a fully open state.

[0063] In some embodiments, the drive assembly 31 includes a drive motor 311, a movable rack 312, and a rotating gear 313; the movable rack 312 and the rotating gear 313 mesh with each other, and one end of the wind deflector 32 is connected to the rotating gear 313; the drive motor 311 can drive the movable rack 312 to move, and the rotating gear 313 meshes with the movable rack 312 to rotate, thereby driving the wind deflector 32 to rotate.

[0064] Specifically, one end of each wind deflector 32 is fixedly connected to a rotating gear 313, and as the rotating gear 313 rotates, it drives the wind deflector 32 to swing, thereby achieving the shielding and opening of the exhaust port 23 on the oil mesh 2.

[0065] Specifically, the drive shaft of the drive motor 311 can drive the movable rack 312 to move back and forth along the direction of the drive shaft, thereby causing the multiple meshing rotating gears 313 on it to rotate, which in turn causes the wind deflector 32 to swing, thus achieving the shielding and opening of the exhaust port 23 on the oil screen 2.

[0066] In some embodiments, the drive assembly 31 further includes a lead screw 314 and a connecting block 315; the connecting block 315 is threadedly connected to the lead screw 314, and one end of the connecting block 315 is fixedly connected to the movable rack 312; the output shaft of the drive motor 311 is connected to the lead screw 314, and under the drive of the drive motor 311, the connecting block 315 can drive the movable rack 312 to move along the direction of the lead screw 314.

[0067] Specifically, the drive shaft of the drive motor 311 is fixedly connected to the lead screw 314, thereby driving the lead screw 314 to rotate. A connecting block 315 is threadedly connected to the lead screw 314, thereby converting the rotational motion of the lead screw 314 into the movement of the connecting block 315 along the lead screw 314. The moving block 315 is fixedly connected to the movable rack 312, thereby enabling the connecting block 315 to drive the movable rack 312 to move.

[0068] Specifically, the connecting block 315 can be a threaded bushing, which is threadedly connected to the lead screw 314. By controlling the forward and reverse rotation of the drive shaft of the drive motor 311, the threaded bushing can reciprocate along the lead screw 314, thereby driving the movable rack 312 to reciprocate, thus enabling the wind deflector 32 to shield and open the exhaust port 23 on the oil screen 2.

[0069] In some embodiments, the air volume regulating mechanism 3 further includes a mounting base 33, on which a sliding groove 331 is provided, and the movable rack 312 can reciprocate along the sliding groove 331.

[0070] Specifically, the mounting base 33 can be fixed relative to the air inlet. By providing a sliding groove 331 in the mounting base 33, the movable rack 31 can be accommodated in the sliding groove 331, and thus the movable rack 31 can slide in it, improving the movement stability of the movable rack 31.

[0071] In some embodiments, the air volume regulating mechanism 3 further includes a limiting baffle 34; the limiting baffle 34 is provided with a connecting hole 341, and both ends of the wind baffle 32 are provided with connecting shafts 35, one of the connecting shafts 35 is fixedly connected to the rotating shaft of the rotating gear 313, and the other connecting shaft 35 is movably connected in the connecting hole 341.

[0072] Specifically, by providing a connecting hole 341 on the limiting baffle 34, a mounting support position is provided for the connecting shaft 35 on the windshield 32, thereby improving the stability of the movement of the windshield 32.

[0073] In some embodiments, the wind deflector 32 is designed to mimic the shape of the smoke vent 23.

[0074] Specifically, the smoke exhaust port 23 can be a rectangular structure, and the shape of the wind baffle 32 can be adapted to the shape of the smoke exhaust port 23, or it can be slightly larger in size than the smoke exhaust port 23, so as to ensure that the wind baffle 32 can completely cover the smoke exhaust port 23.

[0075] In some embodiments, the smoke hood 1 includes a rear top plate 11, a bracket plate 12 is fixedly installed on one side of the rear top plate 11, and the air volume adjustment mechanism 3 is fixed on the rear top plate 11 and the bracket plate 12.

[0076] Specifically, the rear top plate 11 and the bracket plate 12 can be fixed by bolts, and the bracket plate 12 can be used to fix the control panel in the range hood.

[0077] like Figure 11 As shown, this embodiment also discloses a control method for a range hood, applied to the range hood described above, comprising the following steps:

[0078] 1) The range hood starts and operates at the default setting;

[0079] 2) Read the current oil fume concentration y on the left side. a And the oil fume concentration on the right side y b ;

[0080] Specifically, the current oil fume concentration y on the left side is obtained by a first oil fume sensor installed at the left air inlet. a The data is then sent to the control device, which in turn uses a second oil fume sensor located at the right-side air inlet to obtain the current right-side oil fume concentration y. b Finally, the current oil fume concentration y on the left side is read through the control device. a And the oil fume concentration on the right side y b .

[0081] Furthermore, the system can calculate the concentration difference between the two as Δy1 = y a -y b The concentration ratio of the two can also be calculated as Δy² = y. a / y b And take appropriate controls based on the specific comparison results;

[0082] 3) The current reading of the left-side oil fume concentration y a And the oil fume concentration on the right side y b Compare and select y a and y b The largest value in the middle and the preset threshold y f Compare the results and implement appropriate controls accordingly.

[0083] 3.1) If y a >y b Then for ya With y f The size relationships are compared, and corresponding controls are implemented based on the comparison results;

[0084] 3.1.1) If y a >y f Then the range hood system can issue a pre-alarm error signal;

[0085] In other embodiments, in y a >y f In this case, the control device can read the air intake volume setting of the air volume adjustment mechanism in the range hood system at this time. If the air intake volume setting is not the highest setting at this time, the control device will control the air volume adjustment mechanism to increase the air intake volume by one setting.

[0086] Furthermore, if the air intake setting is at its highest level, the control device can also read the stove's power level in the range hood system. If the stove's power level is at its highest, the control device will instruct the range hood system to reduce the stove's power level by one level and issue a warning error signal to remind the user that the stove's power level has been adjusted. If the air intake setting is not at its highest level, the range hood system needs to collect the oil fume concentration y n times within a preset time period. ai If the oil fume concentration y is collected n times... ai The results in 80% of the cases were less than y. f If the stove's heat setting remains unchanged and cooking continues normally, and the oil fume concentration y is collected n times... ai The results in 80% of the cases are greater than or equal to y f If the control device triggers the range hood system, it will issue a warning error signal.

[0087] For example, the range hood system can collect the oil fume concentration y 5 times within 3 seconds. a Let them be y a1 y a2 y a3 y a4 and y a5 If the collected data is y a1 y a2 y a3 y a4 and y a5 There are 4 values ​​in the equation that are all less than y. f If the stove's heat level is not adjusted, the stove will continue cooking normally; if the collected value is y a1 y a2 y a3 y a4 and y a5 There are 4 values ​​in the array that are all greater than or equal to y. fIf the control device triggers the range hood system, it will issue a warning error signal.

[0088] 4) Compare y a With y b The relationship between the difference and the preset concentration difference threshold is used to make corresponding controls based on the comparison results;

[0089] 4.1) If Δy1 < Δy a Then for y a With y b Compare the results and implement appropriate controls accordingly.

[0090] 4.1.1) If y a <y b Then, control the drive motor at the right oil screen to rotate the wind deflector to the first preset angle, and at the same time control the drive motor at the left oil screen to rotate the wind deflector to the second preset angle.

[0091] Specifically, if y a <y b If the smoke concentration produced by the right stove is greater than that produced by the left stove, the control device controls the drive motor of the right air volume adjustment mechanism to rotate the baffle to the first preset angle α1, and at the same time controls the drive motor at the left oil screen to rotate the baffle to the second preset angle ρ1.

[0092] Furthermore, the first preset angle α1 and the second preset angle ρ1 have the following functional relationship:

[0093] tanα1=Atanρ1

[0094] Wherein, parameter A is related to the concentration difference Δy1, the concentration ratio Δy2, and the threshold Δy. a Relevant constant coefficients.

[0095] 4.1.2) If y a >y b Then, control the drive motor at the left oil screen to rotate the wind deflector to the first preset angle α1, and at the same time control the drive motor at the right oil screen to rotate the wind deflector to the second preset angle ρ1.

[0096] 4.2) If Δy a <Δy1<Δy b Then for y a With y b Compare the results and implement appropriate controls accordingly.

[0097] 4.2.1) If y a >y bThen, control the drive motor at the left oil screen to rotate the wind deflector to the third preset angle α2, and at the same time control the drive motor at the right oil screen to rotate the wind deflector to the fourth preset angle ρ2.

[0098] Furthermore, the third preset angle α2 and the fourth preset angle ρ2 have the following functional relationship:

[0099] tanα2=Btanρ2

[0100] Wherein, parameter B is related to the concentration difference Δy1, the concentration ratio Δy2, and the threshold difference (Δy). b -Δy a The relevant constant coefficients.

[0101] 4.2.2) If y a <y b Then, control the drive motor at the right oil screen to rotate the wind deflector to the third preset angle α2, and at the same time control the drive motor at the left oil screen to rotate the wind deflector to the fourth preset angle ρ2.

[0102] 4.3) If Δy b <Δy1 <y f This indicates that the concentration difference is in the high concentration range, and then for y a With y b Compare the results and implement appropriate controls accordingly.

[0103] 4.3.1) If y a >y b Then, control the drive motor at the left oil screen to rotate the wind deflector to the fifth preset angle α3, and at the same time control the drive motor at the right oil screen to rotate the wind deflector to the sixth preset angle ρ3.

[0104] Furthermore, the fifth preset angle α3 and the sixth preset angle ρ3 have the following functional relationship:

[0105] tanα3=Ctanρ3

[0106] Wherein, parameter C is related to the concentration difference Δy1, the concentration ratio Δy2, and the threshold difference (y). f -Δy b The relevant constant coefficients

[0107] 4.3.2) If y a <y b Then, control the drive motor at the right oil screen to rotate the wind deflector to the fifth preset angle α3, and at the same time control the drive motor at the left oil screen to rotate the wind deflector to the sixth preset angle ρ3.

[0108] 4.4) If Δy1>y fThen return to step 3).

[0109] In some embodiments, the control method further includes, after step 1) the range hood is started and running at the default setting, the following steps are also included:

[0110] Determine whether both the left and right stoves are on.

[0111] If not, when the stove on the left is not lit, control the drive motor on the left to rotate the baffle until it engages with the exhaust port;

[0112] When the stove on the right is not lit, the drive motor on the right will be controlled to rotate the baffle until it engages with the exhaust port.

[0113] If so, return to step 2).

[0114] Specifically, when the airflow adjustment mechanism is in its initial state, the baffle and the exhaust port form a 90° angle, meaning the plane of the baffle is perpendicular to the exhaust port. At this time, the oil filter is fully open. When the range hood system detects that the left stove is not lit and the right stove is lit, the control device activates the airflow adjustment mechanism at the left oil filter. The left drive motor then rotates the baffle until it engages with the exhaust port, making the left oil filter fully closed. The airflow adjustment mechanism at the right oil filter is in its initial state, and the right oil filter is fully open.

[0115] Specifically, when the range hood system detects that the right-side stove is not lit and the left-side stove is lit, the control device activates the airflow adjustment mechanism at the right-side oil filter. This causes the right-side drive motor to rotate the baffle plate until it engages with the exhaust port, resulting in the right-side oil filter being fully closed. Meanwhile, the airflow adjustment mechanism at the left-side oil filter is in its initial state, and the left-side oil filter is fully open.

[0116] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0117] It should be noted that all features described in this application (including technical features described in different embodiments) can be combined arbitrarily under reasonable circumstances, and the new technical solutions formed by such combinations are all within the protection scope of this application.

[0118] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A control method of a range hood, characterized by, The application is applied to a range hood, which comprises a smoke collecting hood (1), an oil screen (2) and a wind volume adjusting mechanism (3), left and right air inlets are arranged at the lower part of the smoke collecting hood (1), the oil screen (2) comprises left and right oil screens (21) and (22), the left oil screen (21) is arranged at the left air inlet, and the right oil screen (22) is arranged at the right air inlet; the left and right oil screens (21) and (22) are provided with the wind volume adjusting mechanism (3); the wind volume adjusting mechanism (3) comprises a driving assembly (31) and a wind blocking piece (32) in transmission connection, a plurality of smoke outlets (23) are arranged on the oil screen (2), and the wind blocking piece (32) is arranged in one-to-one correspondence with the smoke outlets (23); the driving assembly (31) can drive the wind blocking piece (32) to rotate, so that the wind blocking piece (32) is driven to open and close relative to the smoke outlets (23), and the method comprises the following steps: 1) the range hood is started to run at a default gear; 2) Obtain current left side oil fume concentration y a and right side oil fume concentration y b ; 3) judge y a and y b the greater value between the size relationship between the preset threshold value y f , according to the results of the comparison to make appropriate control; 3.1) If y a >y b , judge the size relationship between y a and y f , and make corresponding control according to the comparison result; 3.1.1) if y a > y f , the range hood system can issue a pre-warning error signal; 3.1.2) If y a <y f The range hood system needs to collect the oil fume concentration n times within a preset time. If 80% of the results are less than y... f If the result is greater than y, then continue cooking normally. f Then the range hood system can issue a pre-alarm error signal; 4) judging y a the difference between y b and the preset concentration difference threshold value, and performing corresponding control according to the comparison result; 4.1) If Δy1< Δy a , it is indicated that the concentration difference is in the low concentration range, and then y a is compared with y b , and corresponding control is performed according to the comparison result; 4.1.1) if y a < y b then control the drive motor at the right oil screen to drive the wind deflector to rotate to a first preset angle, and control the drive motor at the left oil screen to drive the wind deflector to rotate to a second preset angle; 4.1.2) if y a >y b then control the drive motor at the left oil screen to rotate the wind deflector to a first preset angle, and control the drive motor at the right oil screen to rotate the wind deflector to a second preset angle; 4.2) if Δy a < Δy1< Δy b then the concentration difference is in the middle concentration range, and then y a is compared with y b and the corresponding control is performed according to the comparison result; 4.2.1) if y a <y b then control the drive motor at the right oil screen to drive the wind deflector to rotate to a third preset angle, and control the drive motor at the left oil screen to drive the wind deflector to rotate to a fourth preset angle; 4.2.2) if y a > y b then control the drive motor at the left oil screen to drive the wind deflector to rotate to a third preset angle, and control the drive motor at the right oil screen to drive the wind deflector to rotate to a fourth preset angle; 4.3) if Δy b < Δy1< y f then it is indicated that the concentration difference is in the high concentration range, and then y a is compared with y b and the corresponding control is performed according to the comparison result; 4.3.1) if y a < y b then control the drive motor at the right oil screen to drive the wind deflector to rotate to the fifth preset angle, and control the drive motor at the left oil screen to drive the wind deflector to rotate to the sixth preset angle; 4.3.2) if y a > y b then control the drive motor at the left oil screen to drive the wind deflector to rotate to a fifth preset angle, and control the drive motor at the right oil screen to drive the wind deflector to rotate to a sixth preset angle; 4.4) If Ayi > y f , then go to step 3).

2. The control method of the range hood according to claim 1, characterized in that: the driving assembly (31) comprises a driving motor (311), a movable rack (312) and a rotating gear (313); the movable rack (312) and the rotating gear (313) are in meshing connection, and one end of the wind blocking piece (32) is connected with the rotating gear (313); the driving motor (311) can drive the movable rack (312) to move, the rotating gear (313) is in meshing connection with the movable rack (312) and rotates, and then the wind blocking piece (32) is driven to rotate.

3. The control method of claim 2, wherein: the driving assembly (31) further comprises a screw rod (314) and a connecting block (315); the connecting block (315) is in screw connection with the screw rod (314), and one end of the connecting block (315) is fixedly connected with the movable rack (312); an output shaft of the driving motor (311) is connected with the screw rod (314), and under the driving of the driving motor (311), the connecting block (315) can drive the movable rack (312) to move along the direction in which the screw rod (314) is located.

4. The control method of claim 2, wherein: the wind volume adjusting mechanism (3) further comprises a mounting base (33), the mounting base (33) is provided with a sliding groove (331), and the movable rack (312) can reciprocate along the sliding groove (331).

5. The control method of claim 2, wherein: the wind volume adjusting mechanism (3) further comprises a limiting baffle (34); the limiting baffle (34) is provided with a connecting hole (341), and one end of the wind blocking piece (32) is movably connected with the connecting hole (341).

6. The control method of claim 5, wherein: the wind volume adjusting mechanism (3) further comprises a connecting shaft (35), the wind blocking piece (32) is fixed on the connecting shaft (35), one end of the connecting shaft (35) is fixedly connected with a rotating shaft of the rotating gear (313), and the other end of the connecting shaft (35) is movably connected in the connecting hole (341).

7. The control method of claim 1, wherein: the wind blocking piece (32) is designed in the shape of the smoke outlet (23).

8. The control method of claim 1, wherein: The smoke hood (1) comprises a rear top plate (11), one side of the rear top plate (11) is fixedly provided with a support plate (12), and the air volume adjusting mechanism (3) is fixed on the rear top plate (11) and the support plate (12).

9. The control method of the range hood according to claim 1, characterized in that, After the oil smoke exhauster is started and runs at a default gear, the method further comprises the following steps: Judging whether the left and right cookers are in the fire-on state; If not, when the left cooker is not in the fire-on state, the left driving motor is controlled to drive the baffle to rotate to be buckled with the smoke outlet; When the right cooker is not in the fire-on state, the right driving motor is controlled to drive the baffle to rotate to be buckled with the smoke outlet; If yes, returning to step 2).

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