Push rod control method and range hood

Abstract

The invention discloses a push rod control method and a range hood, the push rod control method is used for the range hood, when the range hood operates for the first time, current data of a driving motor in the whole working period are collected, the collected current data is multiplied by a coefficient k larger than 1, and the product is used as a current limit value set and stored; when the push rod runs next time, collecting a real-time current value of the driving motor, comparing the real-time current value with a current limit value Z at the same time last time, if the real-time current value is smaller than or equal to the current limit value Z last time, multiplying the real-time current value which is just collected by a coefficient k to update the current limit value Z, and if the real-time current value is larger than the current limit value Z last time, accumulating times, when the accumulated number of times exceeds a preset number of times threshold value n, judging that abnormity exists, and controlling the driving motor to stop working; according to the push rod control method provided by the invention, the assembly error when the extractor hood is installed is fully considered, and the problem that the baffle cannot be normally closed due to the fact that the drive motor of the push rod triggers protection by mistake can be effectively avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of range hoods, and particularly relates to a push rod control method and a range hood. Background Art

[0002] Some range hoods have a baffle that can be closed and opened. The baffle rod is connected to a push rod, which is connected to a drive motor. When the baffle is closed, the operating current of the drive motor of most range hood baffles is as follows: Figure 1 As shown in the figure, when the push rod drive motor is powered on, the operating current rises to Q1, and then the push rod drive motor starts to rotate from a stationary state. At the moment of rotation, the operating current drops back to Q2, and then as the speed starts to climb from low speed to maximum, the operating current also climbs to Q3. If the drive motor runs smoothly, the operating current should slowly decrease with slight oscillations. The current limit value z of the existing push rod drive motor is obtained by testing the sample to obtain an average current value, and then multiplying it by a coefficient x, and it is a fixed value, such as Figure 1 Indicated by the horizontal line in the middle.

[0003] However, in actual installation and use, due to structural and assembly deviations, the actual operating current of the push rod drive motor may be as follows: Figure 2 As shown in the figure, during the Q2 ramp-up phase, due to assembly deviations, the current will periodically rise and then fall. t1, t2, and t3 correspond to the maximum current values ​​of three cycles, respectively. It can be seen that t1-t2 is one cycle, and t2-t3 is one cycle. Different product assemblies may have n such cycles.

[0004] With the long-term use of the range hood, or due to environmental influences such as solidification of the lubricating oil inside the drive motor or dust accumulation in the related drive structure, Figure 2 During cycles such as t1, t2, and t3, the operating current value of the drive motor will be amplified due to the increase in the friction coefficient, further exceeding the current limit z, thereby falsely triggering the protection function and causing the baffle to fail to close normally. Summary of the Invention

[0005] The purpose of the present invention is to provide a push rod control method and a range hood, aiming to improve the existing range hood push rod control method, which does not take into account the installation and assembly errors, resulting in the drive motor of some range hood push rods mistakenly triggering protection, thereby causing the baffle to fail to close normally.

[0006] According to one aspect of the present invention, the present invention provides a push rod control method for a range hood, wherein the push rod is driven by a drive motor. When the push rod is operated for the first time, the current data of the drive motor during the entire working period is collected, and the collected current data is multiplied by a coefficient k greater than 1 as a current limit set and saved; when the push rod is operated next time, the real-time current value of the drive motor is collected, and the real-time current value of the drive motor is compared with the current limit Z at the same time last time. If the real-time current value is less than or equal to the last current limit Z, the real-time current value just collected is multiplied by the coefficient k to update the current limit Z. If the real-time current value is greater than the last current limit Z, the number of times is accumulated. When the accumulated number of times exceeds a preset number threshold n, it is determined that there is an abnormality and the drive motor is controlled to stop working. When it is calculated that the current limit Z is greater than or equal to the maximum operating current value allowed by the drive motor, the current limit Z is saved as the maximum operating current value allowed by the drive motor, and an early warning signal is issued.

[0007] According to a second aspect of the present invention, the present invention provides a range hood, which uses the above-mentioned push rod control method to control the push rod.

[0008] Furthermore, the range hood also includes a control unit, an execution circuit and a feedback circuit, and the drive motor, execution circuit and feedback circuit are all electrically connected to the control unit; the feedback circuit collects current data of the drive motor when the push rod moves, and transmits the collected current data to the control unit; the control unit outputs a control signal to the execution circuit according to the set program and the feedback signal of the feedback circuit, and the execution circuit outputs a drive voltage to the drive motor according to the control signal transmitted by the control unit to control the movement of the push rod.

[0009] Furthermore, the control unit includes a data storage module and a data processing module. When the control unit is operated for the first time, the feedback circuit collects the current data of the driving motor during the entire working period and transmits it to the data processing module. The data processing module multiplies the current data transmitted by the feedback circuit by a coefficient k greater than 1 as a current limit set and saves it to the data storage module. When the push rod is operated next time, the feedback circuit collects the real-time current value of the driving motor and transmits it to the data processing module. The data processing module compares the real-time current value of the driving motor with the current limit Z of the last time stored in the data storage module. If the real-time current value is less than or equal to the last current limit Z, the data The processing module multiplies the real-time current value just collected by the coefficient k to update the current limit Z and save it to the data storage module; if the real-time current value is greater than the previous current limit Z, the number of times is accumulated. When the accumulated number of times exceeds the preset number threshold n, it is determined that there is an abnormality, and the data processing module outputs a control signal to the execution circuit. The execution circuit outputs a driving voltage value of zero to the drive motor according to the control signal transmitted by the data processing module, and controls the drive motor to stop working; when the data processing module calculates that the current limit Z is greater than or equal to the maximum operating current value allowed by the drive motor, the current limit Z is saved as the maximum operating current value allowed by the drive motor, and the data processing module issues a warning signal.

[0010] Furthermore, the range hood has a touch panel, an alarm and a wireless communication module, and the touch panel, alarm and wireless communication module are all electrically connected to the control unit; the control unit is connected to the range hood controller through the wireless communication module, and the early warning signal includes a first early warning signal and / or a second early warning signal and / or a third early warning signal, and the first early warning signal is sent to the touch panel, and the touch panel has a display screen, and after receiving the first early warning signal, the touch panel flashes a warning code or flashes a warning logo on its display screen; the second early warning signal is sent to the alarm, and after receiving the second early warning signal, the alarm emits an early warning sound; the third early warning signal is sent to the range hood controller, and after receiving the third early warning signal, the range hood controller issues a reminder in the form of a reminder message.

[0011] Furthermore, the wireless communication module is a long-range wireless communication module or a near-ground wireless communication module, the long-range wireless communication module is at least one of a GPRS communication module, a 4G communication module, and a 5G communication module, the near-ground wireless communication module is at least one of a WiFi communication module and a Bluetooth communication module, and the range hood controller has a communication connection module that matches the wireless communication module of the range hood; the range hood controller also has a display module, an APP module, a sound module and a vibration module, and the APP module is used to bind to the range hood; the reminder information includes a first reminder information and / or a second reminder information and / or a third reminder information, the first reminder information is a text message, which is displayed on the display module of the range hood controller; the second reminder information is a sound message, which is issued through the sound module; the third reminder information is a vibration message, which is issued through the vibration module.

[0012] Furthermore, the range hood has a fixed panel and a switch panel, the switch panel is connected to a driving mechanism, the driving mechanism has a driving motor and a push rod driven by the driving motor to move along a linear direction, the driving motor drives the push rod to drive the switch panel to move between its closed position and open position, and the closed position of the switch panel is higher than the open position.

[0013] Furthermore, the range hood has a range hood housing, the fixed panel is fixedly arranged on the range hood housing, an air suction panel is arranged on the rear side of the fixed panel and the switch panel, and an oil collecting box is arranged at the lower end of the air suction panel; an air suction port is arranged on the air suction panel at a position where the fixed panel and the switch panel are connected when the switch panel is closed, and the air suction port is narrow and long, and its length direction is along the length direction of the range hood.

[0014] The control rod is connected with the control rod of the driving member, and the control rod is connected with the control rod of the driving member. The second connecting rod is connected, and the adjusting piece is connected to the fixing piece; the adjusting piece is in the form of an L-shaped plate, and the adjusting piece is connected to the adjusting piece through its transverse portion, and the first connecting piece and the second connecting piece are both installed on the vertical portion of the adjusting piece; a hanging shaft is provided on the first connecting piece, and the clamping assembly is installed on the second connecting piece, and the clamping assembly includes a clamping seat, a clamping spring and a tongue, and the clamping spring and the tongue are provided with two groups, and the two groups of clamping springs and tongues are both provided in the clamping seat; a first connecting part and a second connecting part are provided on the panel bracket, and the first connecting part is in the shape of a hook and connected to the hanging shaft; a bullet head is provided at one end of the second connecting part away from the panel bracket, and a clamping slot is provided on the side of the bullet head close to the panel bracket, which is respectively clamped and connected to the two groups of clamping springs and tongues, and the tongue is clamped into the clamping slot under the action of a spring; a guide hole slot for the first connecting part and the second connecting part to pass through is provided on the suction panel.

[0015] Furthermore, the driving mechanism includes two groups of driving units with the same structure, and the two groups of driving units are respectively arranged near the two ends of the switch panel; the driving unit includes a mounting bracket, a driving motor, a gear, a rack and a guide rail groove, and the mounting bracket and the guide rail groove are fixedly mounted on the range hood housing, the gear is mounted on the rotating shaft of the driving motor, the gear and the rack are engaged with each other, the rack is slidably mounted in the guide rail groove, the rack is connected to the switch panel through a connecting block, and the suction panel is provided with a guide hole groove for the connecting block to pass through.

[0016] The push rod control method provided by the present invention fully accounts for assembly errors during range hood installation, reduces the probability of the push rod drive motor's erroneous triggering of the protection function, and effectively avoids the problem of the baffle not closing properly due to erroneous triggering of the push rod drive motor's protection function, thereby improving the user experience. Other advantages of the present invention are described in the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is the operating current curve of the damper drive motor when the range hood damper is closed;

[0018] Figure 2 This is a running current curve of the baffle drive motor caused by structural and assembly deviations during the actual installation and use of the range hood during the closing period of the baffle;

[0019] Figure 3 is a method flow chart of the push rod control method provided by the present invention;

[0020] Figure 4 A comparison diagram of a true current data curve of the drive motor collected during the first operation of the push rod control method provided by the present invention and a current data curve obtained by multiplying the collected current data by a coefficient k greater than 1;

[0021] Figure 5 This is a comparison chart of current data curves when the calculated current limit Z is greater than or equal to the maximum operating current value allowed by the drive motor;

[0022] Figure 6 This is a block diagram of the electrical control structure between the control unit, execution circuit, feedback circuit and drive motor of the range hood provided by the present invention;

[0023] Figure 7 This is a block diagram of the electrical control structure between the control unit, touch panel, alarm, wireless communication module and range hood controller of the range hood provided by the present invention;

[0024] Figure 8 is a cross-sectional view of the range hood provided by the present invention at the position of the panel bracket;

[0025] Figure 9 yes Figure 8 Enlarged view of area A in the middle;

[0026] Figure 10 is a cross-sectional view of the range hood provided by the present invention at the position of the panel adjustment component;

[0027] Figure 11 yes Figure 10 Enlarged view of area B in the middle;

[0028] Figure 12 This is an exploded view of the range hood provided by the present invention;

[0029] Figure 13 yes Figure 12 Enlarged view of area C in the middle;

[0030] Figure 14 This is a schematic diagram of the three-dimensional structure of the range hood provided by the present invention with the back panel removed;

[0031] Figure 15 This is a schematic diagram of the three-dimensional structure of the range hood provided by the present invention with the switch panel removed;

[0032] Figure 16 This is a schematic diagram of the driving structure of another switch panel of a range hood provided by the present invention.

[0033] Figure numerals: 0, driving motor; 1, range hood housing; 11, suction panel; 111, suction port; 112, guide hole groove; 2, switch panel; 21, panel bracket; 211, first connecting part; 212, second connecting part; 22, decorative strip; 3, panel adjustment assembly; 31, fixing member; 32, adjusting member; 33, first connecting member; 34, second connecting member; 35, hanging shaft; 36, snap-fit ​​assembly; 361, socket; 362, tongue; 363, compression spring; 4, driving assembly; 41, driving member; 42, first connecting rod; 43, second connecting rod; 44, third connecting rod; 45, synchronization shaft; 5, mounting bracket; 6, fixed panel; 7, oil collecting box; 8, gear; 9, rack; 10, guide rail groove. DETAILED DESCRIPTION

[0034] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0035] The following is a further description with reference to the accompanying drawings and specific embodiments:

[0036] Example 1

[0037] This embodiment provides a push rod control method for a range hood, wherein the range hood has a push rod, and the push rod is driven by a driving motor. The process of the push rod control method is as follows: Figure 3 As shown in FIG, during the first operation, the current data of the driving motor during the entire working period is collected, and the collected current data is multiplied by a coefficient k greater than 1 as the current limit value set and saved. Figure 4 As shown, Figure 4In the figure, the lower curve is the collected current data curve, and the upper curve is the current data curve after the collected current data is multiplied by a coefficient k greater than 1. The next time the push rod runs, the real-time current value of the drive motor is collected, and the real-time current value of the push rod drive motor is compared with the current limit Z at the same time last time. If the real-time current value is less than or equal to the last current limit Z, the real-time current value just collected is multiplied by the coefficient k to update the current limit Z. If the real-time current value is greater than the last current limit Z, the number of times is accumulated. When the accumulated number of times exceeds the preset number threshold n, it is determined that there is an abnormality and the drive motor is controlled to stop working. When it is calculated that the current limit Z is greater than or equal to the maximum operating current value allowed by the drive motor, the current limit Z is saved as the maximum operating current value allowed by the drive motor, and a warning signal is issued. The situation at this time is as follows: Figure 5 As shown, Figure 5 In the figure, the upper horizontal line is the maximum operating current value K of the drive motor, and the current limit Z takes K as the highest benchmark. If the current limit Z calculated during the period t4-t5 is greater than or equal to the maximum operating current value allowed by the drive motor, it means that the drive motor is short of oil or blocked, and the control unit issues an early warning to the user.

[0038] From the above, it can be seen that the push rod control method provided by the present invention fully takes into account the assembly error during the installation of the range hood, reduces the probability of the push rod drive motor falsely triggering the protection, and can effectively avoid the problem of the baffle failing to close normally due to the false triggering of the push rod drive motor protection, thereby improving the user experience.

[0039] Example 2

[0040] This embodiment provides a range hood, such as Figure 6 As shown, the range hood includes a push rod, a control unit, an actuator circuit, and a feedback circuit. The push rod is driven by a drive motor, which is electrically connected to the control unit. The feedback circuit collects current data from the drive motor during push rod movement and transmits this data to the control unit. The control unit outputs a control signal to the actuator circuit based on a pre-set program and feedback signals from the feedback circuit. The actuator circuit then outputs a drive voltage to the drive motor based on the control signal transmitted by the control unit, controlling the movement of the push rod.

[0041] Specifically, the control unit includes a data storage module and a data processing module, which can be a memory chip and an MCU chip on the range hood's main control circuit board. During initial operation, the feedback circuit collects current data from the drive motor throughout its entire operation period and transmits it to the data processing module. The data processing module multiplies the current data transmitted by the feedback circuit by a coefficient k greater than 1 to create a current limit set, which is then stored in the data storage module. The next time the push rod runs, the feedback circuit collects the real-time current value of the drive motor and transmits it to the data processing module. The data processing module compares the real-time current value of the drive motor with the current limit Z of the last time stored in the data storage module. If the real-time current value is less than or equal to the last current limit Z, the data processing module multiplies the real-time current value just collected by the coefficient k to update the current limit Z and save it to the data storage module; if the real-time current value is greater than the last current limit Z, the number of times is accumulated. When the accumulated number of times exceeds the preset number threshold n, it is determined that there is an abnormality, and the data processing module outputs a control signal to the execution circuit. The execution circuit outputs a drive voltage value of zero to the drive motor according to the control signal transmitted by the data processing module, and controls the drive motor to stop working; when the data processing module calculates that the current limit Z is greater than or equal to the maximum operating current value allowed by the drive motor, the current limit Z is saved as the maximum operating current value allowed by the drive motor, and the data processing module issues a warning signal.

[0042] like Figure 7 As shown, the range hood includes a touch panel, an alarm, and a wireless communication module. The touch panel, alarm, and wireless communication module are all electrically connected to a control unit, which is connected to the range hood controller via the wireless communication module. Specifically, the wireless communication module is a long-range wireless communication module or a short-range wireless communication module. The long-range wireless communication module is at least one of a GPRS communication module, a 4G communication module, and a 5G communication module, while the short-range wireless communication module is at least one of a WiFi communication module and a Bluetooth communication module. The range hood controller includes a communication connection module that matches the range hood's wireless communication module. Warning signals include a first warning signal, a second warning signal, and a third warning signal. The first warning signal is sent to the touch panel, which has a display screen. Upon receiving the first warning signal, the touch panel flashes a warning code or a warning logo on its display screen. The second warning signal is sent to the alarm, which emits a warning sound upon receiving the second warning signal. The third warning signal is sent to the range hood controller, which issues a reminder message upon receiving the third warning signal.

[0043] For example, a range hood controller includes a display module, an app module, a sound module, and a vibration module. The app module is used to bind to the range hood. The range hood controller issues reminder messages including a first reminder message, a second reminder message, and a third reminder message. The first reminder message is a text message displayed on the range hood controller's display module, the second reminder message is a sound message issued by the sound module, and the third reminder message is a vibration message issued by the vibration module.

[0044] Example 3

[0045] like Figure 10 、 Figure 11 and Figure 15 As shown, this embodiment provides a range hood, which has a fixed panel 6 and a switch panel 2. The switch panel 2 is the baffle described in Example 1. The switch panel 2 is connected to a drive mechanism, which has a drive motor 0. The drive motor 0 drives the switch panel 2 to move between its closed position and the open position of the switch panel. The closed position of the switch panel 2 is higher than the open position. The range hood has a range hood housing 1. The fixed panel 6 is fixedly arranged on the range hood housing 1. An air suction panel 11 is provided on the rear side of the fixed panel 6 and the switch panel 2. An oil collection box 7 is provided at the lower end of the air suction panel 11. An air suction port 111 is provided on the air suction panel 11 at the position where the fixed panel 6 and the switch panel 2 meet when the switch panel 2 is closed. The air suction port 111 is narrow and long, and its length direction is along the length direction of the range hood. A decorative strip 22 is provided at the upper end of the switch panel 2. When the switch panel 2 is fully closed, the switch panel 2 and the fixed panel 6 press the decorative strip 22. At this time, the air intake 111 is hidden, and the decorative strip 22 is provided, making the range hood look more beautiful.

[0046] like Figures 8-15 As shown, the range hood further comprises a panel bracket 21, to which the switch panel 2 is connected. The range hood comprises a hood housing 1, a drive mechanism comprising a drive assembly 4 and a panel adjustment assembly 3. The drive assembly 4 comprises a driving member 41, a synchronizing shaft 45, a first connecting rod 42, a second connecting rod 43, and a third connecting rod 44. Two second connecting rods 43 and two third connecting rods 44 are provided. The driving member 41 may be an electric cylinder having a driving motor 0 and a push rod driven by the driving motor 0 and running in a linear direction. The push rod is connected to the first connecting rod 42. A third connecting rod 44 is connected at each end of the synchronizing shaft 45. Of the two third connecting rods 44, one is connected to a second connecting rod 43, while the other third connecting rod 44 is connected to both the other second connecting rod 43 and the push rod of the driving member 41. The two second connecting rods 43 are each connected to a panel adjustment assembly 3.

[0047] The panel adjustment assembly 3 includes a fixing member 31, an adjustment member 32, a first connecting member 33, a second connecting member 34, and a snap-fit ​​assembly 36. The fixing member 31 is connected to the second connecting rod 43, and the adjustment member 32 is connected to the fixing member 31. The adjustment member 32 is L-shaped and connected to the adjustment member 32 via its transverse portion. The first connecting member 33 and the second connecting member 34 are both mounted on the vertical portion of the adjustment member 32. The first connecting member 33 is provided with a hanging shaft 35. The snap-fit ​​assembly 36 is mounted on the second connecting member 34. The snap-fit ​​assembly 36 includes a clamping seat 361, a compression spring 363, and a latching tongue 362. The clamping seat 361 is connected to the second connecting member 34. Two sets of compression springs 363 and latching tongues 362 are provided, and both sets of compression springs 363 and latching tongues 362 are mounted in the clamping seat 361. The panel bracket 21 is provided with a first connecting portion 211 and a second connecting portion 212. The first connecting portion 211 is hook-shaped and connected to the hanging shaft 35. The second connecting portion 212 is provided with a bullet-shaped head at one end away from the panel bracket 21. A slot is provided on the side of the bullet-shaped head close to the panel bracket 21, which is respectively connected to two sets of compression springs 363 and a latch 362. The latch 362 is engaged with the slot under the action of the spring, so that the latch assembly 36 firmly fixes the second connecting portion 212. The panel adjustment assembly 3 and the drive assembly 4 are both arranged on the rear side of the air suction panel 11, so the air suction panel 11 is provided with a guide hole 112 for the first connecting portion 211 and the second connecting portion 212 to pass through.

[0048] Example 4

[0049] This embodiment provides a range hood. Compared with Embodiment 3, Embodiment 3 drives the switch panel 2 by a single drive motor, while this embodiment drives the switch panel 2 by dual motors.

[0050] In this embodiment, Figure 16 As shown, the drive mechanism includes two sets of drive units with identical structures, which are respectively arranged near the two ends of the switch panel 2. The drive unit includes a mounting bracket 5, a drive motor 0, a gear 8, a rack 9, and a guide rail 10. The mounting bracket 5 and the guide rail 10 are both fixedly mounted on the range hood housing 1. The gear 8 is mounted on the rotating shaft of the drive motor 0. The gear 8 and the rack 9 are meshed with each other. The rack 9 is slidably mounted in the guide rail 10. The rack 9 is connected to the switch panel 2 via a connecting block. The air intake panel 11 is provided with a guide hole 112 for the connecting block to pass through. When the drive motor 0 is started, the drive motor 0 drives the gear 8 to rotate. When the gear 8 rotates, it drives the rack 9 to slide along the guide rail 10, thereby driving the switch panel 2 to open and close.

[0051] The push rod control method provided by the present invention fully accounts for assembly errors during range hood installation, reduces the probability of the push rod drive motor's erroneous triggering of the protection function, and effectively avoids the problem of the baffle not closing properly due to erroneous triggering of the protection function by the push rod drive motor. The range hood provided by the present invention, through the push rod control method provided by the present invention, effectively avoids the problem of the baffle not closing properly due to erroneous triggering of the protection function by the push rod drive motor, thereby improving the user experience.

[0052] The above is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A push rod control method for a range hood, wherein the push rod is driven by a driving motor, and is characterized in that: During the first operation, the current data of the drive motor during the entire working period is collected, and the collected current data is multiplied by a coefficient k greater than 1 as a current limit set and saved; when the push rod runs next time, the real-time current value of the drive motor is collected, and the real-time current value of the drive motor is compared with the current limit Z at the same time last time. If the real-time current value is less than or equal to the last current limit Z, the real-time current value just collected is multiplied by the coefficient k to update the current limit Z. If the real-time current value is greater than the last current limit Z, the number of times is accumulated. When the accumulated number of times exceeds the preset number threshold n, it is determined that there is an abnormality and the drive motor is controlled to stop working; when it is calculated that the current limit Z is greater than or equal to the maximum working current value allowed by the drive motor, the current limit Z is saved as the maximum working current value allowed by the drive motor, and a warning signal is issued.

2. A range hood, characterized in that: The push rod control method according to claim 1 is used to control the push rod.

3. The range hood according to claim 2, characterized in that: The range hood also includes a control unit, an execution circuit and a feedback circuit, and the drive motor, the execution circuit and the feedback circuit are all electrically connected to the control unit; the feedback circuit collects current data of the drive motor when the push rod moves, and transmits the collected current data to the control unit; the control unit outputs a control signal to the execution circuit according to a set program and a feedback signal of the feedback circuit, and the execution circuit outputs a drive voltage to the drive motor according to the control signal transmitted by the control unit to control the movement of the push rod.

4. The range hood according to claim 3, characterized in that: The control unit includes a data storage module and a data processing module. When the control unit is operated for the first time, the feedback circuit collects the current data of the driving motor during the entire operation period and transmits it to the data processing module. The data processing module multiplies the current data transmitted by the feedback circuit by a coefficient k greater than 1 as a current limit set and saves it to the data storage module. When the push rod is operated next time, the feedback circuit collects the real-time current value of the driving motor and transmits it to the data processing module. The data processing module compares the real-time current value of the driving motor with the current limit value Z of the last time stored in the data storage module. If the real-time current value is less than or equal to the last current limit value Z, the data processing module multiplies the real-time current value just collected by the coefficient k to update the current limit value Z and saves it to the data storage module. If the real-time current value is greater than the last current limit Z, the number of times is accumulated. When the accumulated number of times exceeds the preset number threshold n, it is determined that there is an abnormality, and the data processing module outputs a control signal to the execution circuit. The execution circuit outputs a driving voltage value of zero to the drive motor according to the control signal transmitted by the data processing module, and controls the drive motor to stop working; when the data processing module calculates that the current limit Z is greater than or equal to the maximum operating current value allowed by the drive motor, the current limit Z is saved as the maximum operating current value allowed by the drive motor, and the data processing module issues a warning signal.

5. The range hood according to claim 4, characterized in that: The range hood comprises a touch panel, an alarm and a wireless communication module, and the touch panel, the alarm and the wireless communication module are all electrically connected to the control unit; the control unit is connected to the range hood controller via the wireless communication module, and the warning signal comprises a first warning signal and / or a second warning signal and / or a third warning signal, and the first warning signal is sent to the touch panel, and the touch panel has a display screen, and after receiving the first warning signal, the touch panel flashes a warning code or flashes a warning logo on its display screen; the second warning signal is sent to the alarm, and after receiving the second warning signal, the alarm emits a warning sound; the third warning signal is sent to the range hood controller, and after receiving the third warning signal, the range hood controller issues a reminder in the form of a reminder message.

6. The range hood according to claim 5, characterized in that: The wireless communication module is a long-range wireless communication module or a near-ground wireless communication module, the long-range wireless communication module is at least one of a GPRS communication module, a 4G communication module, and a 5G communication module, the near-ground wireless communication module is at least one of a WiFi communication module and a Bluetooth communication module, the range hood controller has a communication connection module that matches the wireless communication module of the range hood; the range hood controller also has a display module, an APP module, a sound module and a vibration module, the APP module is used to bind to the range hood; the reminder information includes a first reminder information and / or a second reminder information and / or a third reminder information, the first reminder information is a text message, which is displayed on the display module of the range hood controller; the second reminder information is a sound message, which is issued through the sound module; the third reminder information is a vibration message, which is issued through the vibration module.

7. The range hood according to claim 2, characterized in that: The range hood has a fixed panel and a switch panel, the switch panel is connected to a driving mechanism, the driving mechanism has a driving motor and a push rod driven by the driving motor and moving along a linear direction, the driving motor drives the push rod to drive the switch panel to move between its closed position and open position, and the closed position of the switch panel is higher than the open position.

8. The range hood according to claim 7, characterized in that: The range hood comprises a range hood housing, the fixed panel is fixedly arranged on the range hood housing, an air suction panel is arranged on the rear sides of the fixed panel and the switch panel, and an oil collecting box is arranged on the lower end of the air suction panel; an air suction port is arranged on the air suction panel at a position where the fixed panel and the switch panel are connected when the switch panel is closed, and the air suction port is narrow and long, and its length direction is along the length direction of the range hood.

9. The range hood according to claim 8, characterized in that: The range hood also has a panel bracket, and the switch panel is connected to the panel bracket; the range hood has a hood housing, and the driving mechanism includes a driving assembly and a panel adjustment assembly, and the driving assembly includes a driving member, a synchronous shaft, a first connecting rod, a second connecting rod and a third connecting rod, and two of the second connecting rod and the third connecting rod are respectively provided; the driving member has a driving motor and a push rod driven by the driving motor and running in a straight direction, and the push rod is connected to the first connecting rod, and a third connecting rod is connected to each of the two ends of the synchronous shaft, and one of the two third connecting rods is connected to a second connecting rod, and the other third connecting rod is simultaneously connected to the other second connecting rod and the push rod of the driving member, and each of the two second connecting rods is connected to a panel adjustment assembly; the panel adjustment assembly includes a fixing member, an adjusting member, a first connecting member, a second connecting member and a clamping assembly, and the fixing member is connected to the second The connecting rod is connected, and the adjusting piece is connected to the fixing piece; the adjusting piece is in the shape of an L-shaped plate, and the adjusting piece is connected to the adjusting piece through its transverse part, and the first connecting piece and the second connecting piece are both installed on the vertical part of the adjusting piece; a hanging shaft is provided on the first connecting piece, and the clamping assembly is installed on the second connecting piece, and the clamping assembly includes a socket, a retaining spring and a tongue, and the retaining spring and the tongue are provided with two groups, and the two groups of retaining springs and tongues are both arranged in the socket; a first connecting part and a second connecting part are provided on the panel bracket, and the first connecting part is in the shape of a hook and is connected to the hanging shaft; a bullet head is provided at one end of the second connecting part away from the panel bracket, and a clamping groove which is respectively clamped and connected with the two groups of retaining springs and tongues is provided on the side of the bullet head close to the panel bracket, and the tongue is clamped into the clamping groove under the action of a spring; a guide hole groove for the first connecting part and the second connecting part to pass through is provided on the air suction panel.

10. The range hood according to claim 8, characterized in that: The driving mechanism includes two groups of driving units with the same structure, and the two groups of driving units are respectively arranged near the two ends of the switch panel; the driving unit includes a mounting bracket, a driving motor, a gear, a rack and a guide groove, the mounting bracket and the guide groove are fixedly mounted on the range hood housing, the gear is mounted on the rotating shaft of the driving motor, the gear and the rack are meshed with each other, the rack is slidably installed in the guide groove, the rack is connected to the switch panel through a connecting block, and the air intake panel is provided with a guide hole groove for the connecting block to pass through.

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