Cover opening and closing control circuit for intelligent garbage recycling bin and recycling bin

Abstract

The invention provides a cover opening and closing control circuit for an intelligent garbage recycling bin and the recycling bin, and the cover opening and closing control circuit for the intelligent garbage recycling bin comprises a power supply, a data control circuit, a motor driving control circuit, a current feedback circuit and a Hall position sensing circuit, the output end of the data control circuit is connected with the input end of the motor drive control circuit, a sampling resistor R11 is arranged in the motor drive control circuit and connected with the input end of the current feedback circuit, and the output end of the current feedback circuit is connected with the input end of the data control circuit. The output end of the motor driving control circuit is connected with the switch cover motor, the input end of the Hall position sensing circuit is connected with the switch cover motor, and the output end of the Hall position sensing circuit is connected with the input end of the data control circuit. By using the circuit, the current feedback circuit obtains the current of the driving motor in real time, and the data control circuit adjusts the driving power according to the driving current.

Description

Technical Field

[0001] The present invention relates to the technical field of garbage recycling boxes, and in particular to a switch cover control circuit for an intelligent garbage recycling box and a recycling box. Background Art

[0002] With the continuous development of people's living standards, people's consumption level is also constantly improving, which means that more garbage is generated every day in our daily lives. If it is not sorted, it will not only occupy scarce land, pollute the environment, but also seriously endanger our health.

[0003] The most traditional garbage sorting and recycling method is to place garbage recycling bins of different types of garbage together for people to dispose of according to the garbage category. However, over time, people still dispose of garbage at random and are unable to classify it. There is also no way to trace the garbage disposed of by users, and there is a lack of supervision over the user disposal process.

[0004] In order to solve this problem, smart kitchen waste recycling bins have appeared on the market. By registering identity information and combining it with an incentive system, users will be rewarded with a certain number of points each time they put out a certain weight of garbage. When the points reach a certain amount, they can be exchanged for physical items. This method can reduce the user's error rate of disposal and encourage more residents to participate in garbage sorting and recycling.

[0005] The existing smart kitchen waste recycling bin is provided with a garbage bin cover, which is driven to open and close by a brush motor. With the brush motor, the speed of opening and closing the cover is constant. During the opening and closing process, the load on the moving end of the brush motor will constantly change, while the current for controlling the brush motor is fixed. This causes the garbage bin cover to easily shake or the opening and closing of the cover to be unsmooth. In the scenario where the cover is opened and closed frequently during garbage recycling, the garbage bin cover and the brush motor are prone to loosening or damage, which affects the service life of the equipment, fails to meet the user's usage needs, and is not conducive to improving the competitiveness of the product. Summary of the invention

[0006] In order to solve the problems in the prior art, the present invention provides a control circuit for opening and closing a cover of an intelligent garbage recycling box and a recycling box.

[0007] The present invention discloses a switch cover control circuit for an intelligent garbage recycling box, comprising a power supply, a data control circuit, a motor drive control circuit, a current feedback circuit and a Hall position sensing circuit, wherein the output end of the power supply is respectively connected to the input ends of the data control circuit, the motor drive control circuit, the current feedback circuit and the Hall position sensing circuit, the output end of the data control circuit is connected to the input end of the motor drive control circuit, a sampling resistor R11 is provided in the motor drive control circuit, the sampling resistor R11 is connected to the input end of the current feedback circuit, the output end of the current feedback circuit is connected to the input end of the data control circuit, the output end of the motor drive control circuit is connected to the switch cover motor, the input end of the Hall position sensing circuit is connected to the switch cover motor, the output end of the Hall position sensing circuit is connected to the input end of the data control circuit, the data control circuit can control the motor drive control circuit to increase or reduce the driving force of the motor according to the information fed back by the current feedback circuit, the Hall position sensing circuit can cooperate with the data control circuit to make the motor rotate continuously, and the current feedback circuit can obtain the motor drive current size in the motor drive control circuit and send it to the data control circuit for processing.

[0008] The present invention is further improved, the current feedback circuit includes a resistor R22, a resistor R31 and a signal amplifier chip U4, the signal amplifier chip U4 is provided with 8 pins, the sampling resistor R11 is connected to one end of the resistor R22, the other end of the resistor R22 is connected to the third pin of the signal amplifier chip U4, one end of the resistor R31 is connected to the first pin of the signal amplifier chip U4, and the other end of the resistor R31 is connected to the input end of the data control circuit.

[0009] The present invention is further improved, the data control circuit includes a control chip U1, the control chip U1 is provided with 48 pins, the resistor R31 is connected to the 19th pin of the control chip U1, the output end of the Hall position sensing circuit is connected to the 16th, 17th and 18th pins of the control chip U1, and the 26th, 27th, 28th, 29th, 30th and 31st pins of the control chip U1 are connected to the input end of the motor drive control circuit.

[0010] The present invention is further improved, the Hall position sensing circuit includes a Hall interface, a resistor R26, a resistor R24 ​​and a resistor R23, 8 contacts are set in the Hall interface, the 7th pin of the Hall interface is connected to one end of the resistor R26, the other end of the resistor R26 is connected to the 16th pin of the control chip U1, the 6th pin of the Hall interface is connected to one end of the resistor R24, the other end of the resistor R24 ​​is connected to the 17th pin of the control chip U1, the 5th pin of the Hall interface is connected to one end of the resistor R23, and the other end of the resistor R23 is connected to the 18th pin of the control chip U1.

[0011] The present invention is further improved, the motor drive control circuit includes a motor drive circuit and a motor pre-drive circuit, the 26th, 27th, 28th, 29th, 30th and 31st pins of the control chip U1 are connected to the input end of the motor pre-drive circuit, and the output end of the motor pre-drive circuit is connected to the input end of the motor drive circuit.

[0012] The present invention is further improved, the motor pre-drive circuit includes a signal conversion chip U3, the signal conversion chip U3 is provided with 20 pins, the first pin of the signal conversion chip U3 is connected to the 29th pin of the control chip U1, the second pin of the signal conversion chip U3 is connected to the 30th pin of the control chip U1, the third pin of the signal conversion chip U3 is connected to the 31st pin of the control chip U1, the fourth pin of the signal conversion chip U3 is connected to the 26th pin of the control chip U1, the fifth pin of the signal conversion chip U3 is connected to the 27th pin of the control chip U1, the sixth pin of the signal conversion chip U3 is connected to the 28th pin of the control chip U1, and the 9th, 10th, 11th, 12th, 13th, 15th, 16th, 18th and 19th pins of the signal conversion chip U3 are connected to the input end of the motor drive circuit.

[0013] The present invention is further improved, the motor pre-drive circuit also includes a diode D4, a diode D3, a diode D2, a capacitor C11, a capacitor C10, a capacitor C9 and a resistor R21, the power supply is connected to one end of the resistor R21, the other end of the resistor R21 is respectively connected to the positive electrodes of the diode D4, the diode D3 and the diode D2, the cathode of the diode D4 is respectively connected to the 20th pin of the signal conversion chip U3 and one end of the capacitor C11, the other end of the capacitor C11 is respectively connected to the 18th pin of the signal conversion chip U3 and the input end of the motor drive circuit, the cathode of the diode D3 is respectively connected to the 17th pin of the signal conversion chip U3 and one end of the capacitor C10, the other end of the capacitor C10 is respectively connected to the 15th pin of the signal conversion chip U3 and the input end of the motor drive circuit, the cathode of the diode D2 is respectively connected to the 14th pin of the signal conversion chip U3 and one end of the capacitor C9, and the other end of the capacitor C9 is respectively connected to the 12th pin of the signal conversion chip U3 and the input end of the motor drive circuit.

[0014] The present invention is further improved. The motor driving circuit includes a field effect tube Q2, a field effect tube Q3, a field effect tube Q4, a field effect tube Q5, a field effect tube Q6 and a field effect tube Q7. The power supply is respectively connected to the source of the field effect tube Q7, the field effect tube Q5 and the field effect tube Q6. The drains of the field effect tube Q7, the field effect tube Q5 and the field effect tube Q6 are respectively connected to the input end corresponding to the motor. The sources of the field effect tube Q2, the field effect tube Q3 and the field effect tube Q4 are respectively connected to the input end corresponding to the motor. The motor input end connected to the source of the field effect tube Q2 is the same as the motor input end connected to the drain of the field effect tube Q7. The motor input end connected to the source of the field effect tube Q3 is the same as the motor input end connected to the drain of the field effect tube Q5. The motor input end connected to the source of the field effect tube Q4 is The input end is the same as the motor input end connected to the drain of the field effect transistor Q6, the drains of the field effect transistors Q2, Q3 and Q4 are respectively connected to one end of the sampling resistor R11, the other end of the sampling resistor R11 is grounded, the gate of the field effect transistor Q7 is connected to the 18th and 19th pins of the signal conversion chip U3, the gate of the field effect transistor Q5 is connected to the 16th and 15th pins of the signal conversion chip U3, the gate of the field effect transistor Q6 is connected to the 13th and 12th pins of the signal conversion chip U3, the gate of the field effect transistor Q2 is connected to the 11th pin of the signal conversion chip U3, the gate of the field effect transistor Q3 is connected to the 10th pin of the signal conversion chip U3, and the gate of the field effect transistor Q4 is connected to the 9th pin of the signal conversion chip U3.

[0015] The present invention is further improved, the motor pre-drive circuit also includes a resistor R20, a resistor R19, a resistor R18, a resistor R17, a resistor 16, a resistor 15, a resistor 14, a resistor 13, a resistor 12, a resistor 10, a resistor 9 and a resistor 8, one end of the resistor R20 is connected to the 13th pin of the signal conversion chip U3, the other end of the resistor R20 is connected to the gate of the field effect tube Q6, one end of the resistor R19 is connected to the 12th pin of the signal conversion chip U3 and the input end corresponding to the motor, the motor input end connected to the resistor R19 is the same as the motor input end connected to the drain of the field effect tube Q6, and the other end of the resistor R19 is connected to the gate of the field effect tube Q6. The other end of the resistor R20 is connected to the gate of the field effect tube Q6 respectively, one end of the resistor R18 is connected to the 9th pin of the signal conversion chip U3, the other end of the resistor R18 is connected to the gate of the field effect tube Q4, one end of the resistor R17 is connected to one end of the sampling resistor R11, the other end of the resistor R17 is respectively connected to the other end of the motor R18 and the gate of the field effect tube Q4, one end of the resistor R16 is connected to the 16th pin of the signal conversion chip U3, the other end of the resistor R16 is connected to the gate of the field effect tube Q5, one end of the resistor R15 is connected to the 15th pin of the signal conversion chip U3 and the input end corresponding to the motor , the motor input end connected to resistor R15 is the same as the motor input end connected to the drain of field effect tube Q5, the other end of resistor R15 is respectively connected to the other end of resistor R16 and the gate of field effect tube Q5, one end of resistor R14 is connected to the 10th pin of signal conversion chip U3, the other end of resistor R14 is connected to the gate of field effect tube Q3, one end of resistor R13 is connected to one end of sampling resistor R11, the other end of resistor R13 is respectively connected to the other end of motor R14 and the gate of field effect tube Q3, one end of resistor R12 is connected to the 19th pin of signal conversion chip U3, the other end of resistor R12 is connected to the gate of field effect tube Q3 The gate of the field effect tube Q7 is connected, one end of the resistor R10 is connected to the 18th pin of the signal conversion chip U3 and the input end corresponding to the motor, the motor input end connected to the resistor R10 is the same as the motor input end connected to the drain of the field effect tube Q7, the other end of the resistor R10 is respectively connected to the other end of the resistor R12 and the gate of the field effect tube Q7, one end of the resistor R9 is connected to the 11th pin of the signal conversion chip U3, the other end of the resistor R9 is connected to the gate of the field effect tube Q2, one end of the resistor R8 is connected to one end of the sampling resistor R11, and the other end of the resistor R8 is respectively connected to the other end of the motor R9 and the gate of the field effect tube Q2.

[0016] The present invention provides a recycling box, comprising a recycling shell body, a recycling box body, an opening and closing cover assembly, a driving control board and a power supply. The driving control board is provided with any of the above-mentioned control circuits for opening and closing the cover of an intelligent garbage recycling box, a layered partition is provided in the recycling shell body, the opening and closing cover assembly and the recycling box body are respectively arranged on the upper and lower sides of the layered partition, a delivery window is provided on the layered partition, the opening and closing cover assembly comprises a bin cover and a DC brushless motor, the power supply and the DC brushless motor are respectively electrically connected to the driving control board, a flip driving rod is provided on the bin cover, the moving end of the DC atomizing motor is connected to the flip driving rod, and the DC brushless motor can drive the bin cover to flip and seal the delivery window.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a control circuit for the switch cover of an intelligent garbage recycling bin and a recycling bin. By adopting its structure, the problem that the bin cover is prone to shaking or the switch cover is not smooth in the prior art garbage recycling bin can be effectively solved. By applying the circuit, the cooperation of the current feedback circuit and the sampling resistor R11, the current size of the driving motor can be obtained in real time. The current feedback circuit transmits the obtained current signal to the data control circuit. The data control circuit adjusts the driving power according to the size of the driving current and adjusts the output PWM signal to ensure the stable output of the motor at the motor end. The problem that the existing motor drive shakes when the switch cover is on, the switch cover is not smooth or components are damaged is effectively solved, which effectively improves the user experience and is conducive to improving the competitiveness of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the present invention or the solutions in the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the overall structure of the recycling bin;

[0020] Figure 2 It is a principle block diagram of the control circuit for the switch cover of the intelligent garbage recycling bin;

[0021] Figure 3 is a circuit diagram of a data control circuit;

[0022] Figure 4 is a circuit diagram of a motor drive circuit;

[0023] Figure 5 The circuit diagram of the motor pre-drive circuit;

[0024] Figure 6 is a circuit diagram of a current feedback circuit;

[0025] Figure 7 This is the circuit diagram of the Hall position sensing circuit. DETAILED DESCRIPTION

[0026] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present invention or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0027] Reference to "embodiments" in the present invention means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it mutually exclusive, independent, or alternative to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in the present invention may be combined with other embodiments.

[0028] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0029] like Figure 1-7 As shown, a recycling box of the present invention includes a recycling shell body 1, a recycling box body 2, an opening and closing cover assembly, a driving control board 5 and a power supply.

[0030] A layered partition is provided in the recycling shell body 1, the opening and closing cover assembly and the recycling box 2 are respectively arranged on the upper and lower sides of the layered partition, a delivery window is provided on the layered partition, the opening and closing cover assembly includes a bin cover 3 and a DC brushless motor 4, the power supply and the DC brushless motor 4 are respectively electrically connected to the drive control board 5, a flip drive rod is provided on the bin cover 3, the moving end of the DC atomizing motor is connected to the flip drive rod, and the DC brushless motor 4 can drive the bin cover 3 to flip and seal the delivery window.

[0031] The recycling box also includes an opening button 6, a lighting lamp, a weighing scale, a status indicator light and a garbage overflow sensor. The opening button 6, the lighting lamp, the weighing scale, the status indicator light and the garbage overflow sensor are all electrically connected to the drive control board 5. The recycling box 2 is placed on the weighing scale for real-time weighing. The garbage overflow sensor can detect whether the garbage in the recycling box 2 is full. The indicator light is used to prompt the user of the current status of the device. The lighting lamp is used to illuminate the delivery window to improve the accuracy of the user's delivery.

[0032] The recycling box also includes an interactive control display screen 7 , which is electrically connected to the drive control board 5 .

[0033] The driving control board 5 is connected to various components in the recycling box, receives instructions from the interactive control display screen 7, controls various components, and feeds back status information of various components to the interactive control display screen 7.

[0034] When it is necessary to place the recyclable items, the interactive control display screen 7 is operated and the command to open the door is issued. After receiving the command, the drive control board 5 controls the DC brushless motor 4 to rotate, open the door, and turn on the time light and status indicator light, waiting for the user to place the items. When the user has placed the items, the drive control board 5 controls the weighing scale to weigh the items, and then transmits the weight data to the interactive control display screen 7, informing the user of the weight of the items placed this time, and notifying the drive control board 5 to close the door. After the drive control board 5 controls the DC brushless motor 4 to close the door, it locks the door, turns off the lighting and indicator lights, and feeds back the status of the door to the interactive control display screen 7, and the item placement is completed.

[0035] When the recycling bin is full, the drive control board 5 detects the overflow status and then feeds back to the interactive control display screen 7 to notify the backstage manager. After the manager arrives at the recycling bin, he is authorized by the interactive control display screen 7. After the interactive control display screen 7 sends the door opening instruction, the drive control board 5 opens the door lock. After the manager takes out the items, he closes the door. At the same time, the drive control board 5 feeds back the door status to the interactive control display screen 7. After confirming that the door is closed, the operation is completed.

[0036] The drive control board 5 is provided with a control circuit for the switch cover of the intelligent garbage recycling box. The control circuit for the switch cover of the intelligent garbage recycling box includes a power supply, a data control circuit, a motor drive control circuit, a current feedback circuit and a Hall position sensing circuit. The output end of the power supply is respectively connected to the input ends of the data control circuit, the motor drive control circuit, the current feedback circuit and the Hall position sensing circuit. The output end of the data control circuit is connected to the input end of the motor drive control circuit. A sampling resistor R11 is provided in the motor drive control circuit. The sampling resistor R11 is connected to the input end of the current feedback circuit. The output end of the current feedback circuit is connected to the input end of the data control circuit. The output end of the motor drive control circuit is connected to the switch cover motor. The input end of the Hall position sensing circuit is connected to the switch cover motor. The output end of the Hall position sensing circuit is connected to the input end of the data control circuit. The data control circuit can control the motor drive control circuit to increase or decrease the driving force of the motor according to the information fed back by the current feedback circuit. The Hall position sensing circuit can cooperate with the data control circuit to make the motor rotate continuously. The current feedback circuit can obtain the motor drive current size in the motor drive control circuit and send it to the data control circuit for processing.

[0037] Through the cooperation of the current feedback circuit and the sampling resistor R11, the current size of the driving motor can be obtained in real time. The current feedback circuit transmits the obtained current signal to the data control circuit. The data control circuit adjusts the driving power according to the size of the driving current, and adjusts the output PWM signal to ensure the stable output of the motor at the motor end. This effectively solves the problem that the load size of the existing motor drive will constantly change during the opening and closing process of the cover, and it is easy for the power to fail to stably drive the compartment cover 3 to flip, resulting in jitter or unsmooth opening and closing of the cover, and easy damage to components after long-term use, which affects the service life of the equipment and the user experience, and is not conducive to improving the competitiveness of the product.

[0038] The current feedback circuit includes a resistor R22, a resistor R31 and a signal amplifier chip U4. The signal amplifier chip U4 is provided with 8 pins. The sampling resistor R11 is connected to one end of the resistor R22, the other end of the resistor R22 is connected to the third pin of the signal amplifier chip U4, one end of the resistor R31 is connected to the first pin of the signal amplifier chip U4, and the other end of the resistor R31 is connected to the input end of the data control circuit.

[0039] The current signal of the sampling resistor R11 is collected through the current feedback circuit. After coupling through the resistor R22, the signal amplifier chip U4 compares and amplifies the signal, and then after coupling through the resistor R31, it is fed back to the data control circuit. After the data control circuit detects the current feedback, it adjusts the output PWM signal according to the size of the driving current to control the output of the motor and ensure the smooth operation of the motor.

[0040] The model of the signal amplifier chip U4 is LM358.

[0041] The data control circuit includes a control chip U1, which is provided with 48 pins. The resistor R31 is connected to the 19th pin of the control chip U1, the output end of the Hall position sensing circuit is connected to the 16th, 17th and 18th pins of the control chip U1, and the 26th, 27th, 28th, 29th, 30th and 31st pins of the control chip U1 are connected to the input end of the motor drive control circuit.

[0042] By cooperating with the Hall position sensing circuit, the position information of the motor is analyzed, and a driving signal is sent to the motor to control the rotation of the motor. In the process of controlling the rotation of the motor, the duty cycle of the PWM pulse width is adjusted to adjust the driving power of the motor to achieve the purpose of speed regulation.

[0043] And it is possible to realize segmented speed regulation according to the rotation position of the bin cover 3, and adjust the flipping speed in each flipping range of the bin cover 3 according to the user's experience, so as to ensure fast opening of the cover while ensuring the protection of the bin cover 3 by closing the cover, and avoid collision between the bin cover 3 and the layered partition during the closing process to generate noise or affect the service life, thereby improving the user experience and ensuring the service life of the equipment.

[0044] The model of the control chip U1 is GD32F310.

[0045] The Hall position sensing circuit includes a Hall interface, a resistor R26, a resistor R24 ​​and a resistor R23. Eight contacts are provided in the Hall interface. The 7th pin of the Hall interface is connected to one end of the resistor R26, and the other end of the resistor R26 is connected to the 16th pin of the control chip U1. The 6th pin of the Hall interface is connected to one end of the resistor R24, and the other end of the resistor R24 ​​is connected to the 17th pin of the control chip U1. The 5th pin of the Hall interface is connected to one end of the resistor R23, and the other end of the resistor R23 is connected to the 18th pin of the control chip U1.

[0046] During the rotation of the motor, a Hall feedback signal is generated. After coupling through three resistors, R26, R24 and R23, three-phase Hall feedback signals, HALL-U, HALL-V and HALL-W, are output to the microprocessor. The microprocessor changes the current direction of the motor's internal coil based on the feedback Hall position data, thereby generating an alternating magnetic field to allow the motor to continue rotating.

[0047] The rotation position of the motor is detected by the Hall position sensing circuit, so as to calculate the swing position of the door and the remaining distance driven by the motor to form a position feedback.

[0048] The motor drive control circuit includes a motor drive circuit and a motor pre-drive circuit. Pins 26, 27, 28, 29, 30 and 31 of the control chip U1 are connected to the input end of the motor pre-drive circuit, and the output end of the motor pre-drive circuit is connected to the input end of the motor drive circuit.

[0049] By setting up the motor pre-drive circuit, the driving capability can be effectively increased, and it can serve as a connecting bridge between the data control circuit and the motor drive circuit, converting the drive signal sent by the data control circuit into the control signal required by the motor drive circuit, thereby ensuring efficient operation of the motor.

[0050] The motor pre-drive circuit includes a signal conversion chip U3, which is provided with 20 pins. The first pin of the signal conversion chip U3 is connected to the 29th pin of the control chip U1, the second pin of the signal conversion chip U3 is connected to the 30th pin of the control chip U1, the third pin of the signal conversion chip U3 is connected to the 31st pin of the control chip U1, the fourth pin of the signal conversion chip U3 is connected to the 26th pin of the control chip U1, the fifth pin of the signal conversion chip U3 is connected to the 27th pin of the control chip U1, the sixth pin of the signal conversion chip U3 is connected to the 28th pin of the control chip U1, and the 9th, 10th, 11th, 12th, 13th, 15th, 16th, 18th and 19th pins of the signal conversion chip U3 are connected to the input end of the motor drive circuit.

[0051] The model of the signal conversion chip U3 is EG2124.

[0052] The motor pre-drive circuit also includes a diode D4, a diode D3, a diode D2, a capacitor C11, a capacitor C10, a capacitor C9 and a resistor R21. The power supply is connected to one end of the resistor R21, the other end of the resistor R21 is respectively connected to the positive electrodes of the diode D4, the diode D3 and the diode D2, the cathode of the diode D4 is respectively connected to the 20th pin of the signal conversion chip U3 and one end of the capacitor C11, the other end of the capacitor C11 is respectively connected to the 18th pin of the signal conversion chip U3 and the input end of the motor drive circuit, the cathode of the diode D3 is respectively connected to the 17th pin of the signal conversion chip U3 and one end of the capacitor C10, the other end of the capacitor C10 is respectively connected to the 15th pin of the signal conversion chip U3 and the input end of the motor drive circuit, the cathode of the diode D2 is respectively connected to the 14th pin of the signal conversion chip U3 and one end of the capacitor C9, and the other end of the capacitor C9 is respectively connected to the 12th pin of the signal conversion chip U3 and the input end of the motor drive circuit.

[0053] The motor drive circuit includes a field effect transistor Q2, a field effect transistor Q3, a field effect transistor Q4, a field effect transistor Q5, a field effect transistor Q6 and a field effect transistor Q7. The power supply is connected to the source of the field effect transistor Q7, the field effect transistor Q5 and the field effect transistor Q6 respectively. The drains of the field effect transistor Q7, the field effect transistor Q5 and the field effect transistor Q6 are connected to the input ends corresponding to the motor respectively. The sources of the field effect transistor Q2, the field effect transistor Q3 and the field effect transistor Q4 are connected to the input ends corresponding to the motor respectively. The motor input end connected to the source of the field effect transistor Q2 is the same as the motor input end connected to the drain of the field effect transistor Q7. The motor input end connected to the source of the field effect transistor Q3 is the same as the motor input end connected to the drain of the field effect transistor Q5. The motor input end connected to the source of the field effect transistor Q4 is the same as the motor input end connected to the drain of the field effect transistor Q5. The drain of field effect transistor Q6 is connected to the same motor input end, the drains of field effect transistor Q2, field effect transistor Q3 and field effect transistor Q4 are respectively connected to one end of sampling resistor R11, the other end of sampling resistor R11 is grounded, the gate of field effect transistor Q7 is connected to the 18th and 19th pins of signal conversion chip U3, the gate of field effect transistor Q5 is connected to the 16th and 15th pins of signal conversion chip U3, the gate of field effect transistor Q6 is connected to the 13th and 12th pins of signal conversion chip U3, the gate of field effect transistor Q2 is connected to the 11th pin of signal conversion chip U3, the gate of field effect transistor Q3 is connected to the 10th pin of signal conversion chip U3, and the gate of field effect transistor Q4 is connected to the 9th pin of signal conversion chip U3.

[0054] The motor uses a brushless DC motor 4, which is divided into three-phase drive lines of U, V and W. A total of 6 field effect transistors Q2-Q7 form a driving H bridge. For example, field effect transistors Q7 and field effect transistors Q3 are turned on, so that the current passes through the field effect transistor Q7 from 24V, then flows into the brushless DC motor 4 through the U phase, and then flows out from the V phase, and finally reaches GND through the field effect transistor Q3 to form a driving loop. Among them, the sampling resistor R11 is used to detect the size of the driving current to form a current feedback circuit in the motor drive.

[0055] The H-bridge circuit setting can effectively prevent the motor drive circuit from being disturbed and malfunctioning, and by cooperating with the motor pre-drive circuit, it can effectively prevent, for example, the field effect transistor Q7 and the field effect transistor Q2 from being closed at the same time, and the input power supply being directly grounded to cause a short circuit, thereby improving the reliability of the circuit's smooth operation.

[0056] The motor pre-drive circuit also includes resistor R20, resistor R19, resistor R18, resistor R17, resistor 16, resistor 15, resistor 14, resistor 13, resistor 12, resistor 10, resistor 9 and resistor 8. One end of resistor R20 is connected to the 13th pin of the signal conversion chip U3, and the other end of resistor R20 is connected to the gate of field effect tube Q6. One end of resistor R19 is connected to the 12th pin of the signal conversion chip U3 and the input end corresponding to the motor. The motor input end connected to resistor R19 is the same as the motor input end connected to the drain of field effect tube Q6. The other end of resistor R19 is connected to resistor R2 0 is connected to the gate of the field effect tube Q6, one end of the resistor R18 is connected to the 9th pin of the signal conversion chip U3, the other end of the resistor R18 is connected to the gate of the field effect tube Q4, one end of the resistor R17 is connected to one end of the sampling resistor R11, the other end of the resistor R17 is respectively connected to the other end of the motor R18 and the gate of the field effect tube Q4, one end of the resistor R16 is connected to the 16th pin of the signal conversion chip U3, the other end of the resistor R16 is connected to the gate of the field effect tube Q5, one end of the resistor R15 is connected to the 15th pin of the signal conversion chip U3 and the input end corresponding to the motor, and the resistor R1 The motor input end connected to 5 is the same as the motor input end connected to the drain of the field effect tube Q5, the other end of the resistor R15 is respectively connected to the other end of the resistor R16 and the gate of the field effect tube Q5, one end of the resistor R14 is connected to the 10th pin of the signal conversion chip U3, the other end of the resistor R14 is connected to the gate of the field effect tube Q3, one end of the resistor R13 is connected to one end of the sampling resistor R11, the other end of the resistor R13 is respectively connected to the other end of the motor R14 and the gate of the field effect tube Q3, one end of the resistor R12 is connected to the 19th pin of the signal conversion chip U3, and the other end of the resistor R12 is connected to the gate of the field effect tube Q 7, one end of the resistor R10 is connected to the 18th pin of the signal conversion chip U3 and the input end corresponding to the motor, the motor input end connected to the resistor R10 is the same as the motor input end connected to the drain of the field effect tube Q7, the other end of the resistor R10 is respectively connected to the other end of the resistor R12 and the gate of the field effect tube Q7, one end of the resistor R9 is connected to the 11th pin of the signal conversion chip U3, the other end of the resistor R9 is connected to the gate of the field effect tube Q2, one end of the resistor R8 is connected to one end of the sampling resistor R11, and the other end of the resistor R8 is respectively connected to the other end of the motor R9 and the gate of the field effect tube Q2.

[0057] As can be seen from the above, the beneficial effects of the present invention are: adopting its mechanism can effectively solve the problem of the garbage recycling box in the prior art that the bin cover 3 is prone to shaking or the opening and closing of the cover is not smooth. By applying this circuit, the cooperation of the current feedback circuit and the sampling resistor R11, the current size of the drive motor can be obtained in real time. The current feedback circuit transmits the acquired current signal to the data control circuit. The data control circuit adjusts the driving power according to the size of the driving current, and adjusts the output PWM signal to ensure the stable output of the motor at the motor end. It effectively solves the problem of shaking, unsmooth opening and closing of the cover or component damage in the existing motor drive, effectively improves the user experience, and is conducive to improving the competitiveness of the product.

[0058] The specific implementation modes described above are preferred implementation modes of the present invention, and are not intended to limit the specific implementation scope of the present invention. The scope of the present invention includes but is not limited to the specific implementation modes, and all equivalent changes made according to the present invention are within the protection scope of the present invention.

Claims

1. A control circuit for the switch cover of an intelligent garbage recycling bin, characterized in that: The invention comprises a power supply, a data control circuit, a motor drive control circuit, a current feedback circuit and a Hall position sensing circuit. The output end of the power supply is respectively connected to the input ends of the data control circuit, the motor drive control circuit, the current feedback circuit and the Hall position sensing circuit. The output end of the data control circuit is connected to the input end of the motor drive control circuit. A sampling resistor R11 is provided in the motor drive control circuit. The sampling resistor R11 is connected to the input end of the current feedback circuit. The output end of the current feedback circuit is connected to the input end of the data control circuit. The output end of the motor drive control circuit is connected to the switch cover motor. The input end of the Hall position sensing circuit is connected to the switch cover motor. The output end of the Hall position sensing circuit is connected to the input end of the data control circuit. The data control circuit can control the motor drive control circuit to increase or decrease the driving force of the motor according to the information fed back by the current feedback circuit. The Hall position sensing circuit can cooperate with the data control circuit to make the motor rotate continuously. The current feedback circuit can obtain the motor drive current size in the motor drive control circuit and send it to the data control circuit for processing.

2. The intelligent garbage collection bin cover switch control circuit according to claim 1, characterized in that: The current feedback circuit includes a resistor R22, a resistor R31 and a signal amplifying chip U4. The signal amplifying chip U4 is provided with 8 pins. The sampling resistor R11 is connected to one end of the resistor R22, and the other end of the resistor R22 is connected to the third pin of the signal amplifying chip U4. One end of the resistor R31 is connected to the first pin of the signal amplifying chip U4, and the other end of the resistor R31 is connected to the input end of the data control circuit.

3. The intelligent garbage collection bin cover switch control circuit according to claim 2 is characterized in that: The data control circuit includes a control chip U1, which is provided with 48 pins. The resistor R31 is connected to the 19th pin of the control chip U1, the output end of the Hall position sensing circuit is connected to the 16th, 17th and 18th pins of the control chip U1, and the 26th, 27th, 28th, 29th, 30th and 31st pins of the control chip U1 are connected to the input end of the motor drive control circuit.

4. The intelligent garbage collection bin cover switch control circuit according to claim 3 is characterized in that: The Hall position sensing circuit includes a Hall interface, a resistor R26, a resistor R24 ​​and a resistor R23. The Hall interface is provided with 8 contacts. The 7th pin of the Hall interface is connected to one end of the resistor R26, and the other end of the resistor R26 is connected to the 16th pin of the control chip U1. The 6th pin of the Hall interface is connected to one end of the resistor R24, and the other end of the resistor R24 ​​is connected to the 17th pin of the control chip U1. The 5th pin of the Hall interface is connected to one end of the resistor R23, and the other end of the resistor R23 is connected to the 18th pin of the control chip U1.

5. The intelligent garbage collection bin cover switch control circuit according to claim 4, characterized in that: The motor drive control circuit includes a motor drive circuit and a motor pre-drive circuit. Pins 26, 27, 28, 29, 30 and 31 of the control chip U1 are connected to the input end of the motor pre-drive circuit, and the output end of the motor pre-drive circuit is connected to the input end of the motor drive circuit.

6. The intelligent garbage collection bin cover switch control circuit according to claim 5, characterized in that: The motor pre-drive circuit includes a signal conversion chip U3, which is provided with 20 pins. The first pin of the signal conversion chip U3 is connected to the 29th pin of the control chip U1, the second pin of the signal conversion chip U3 is connected to the 30th pin of the control chip U1, the third pin of the signal conversion chip U3 is connected to the 31st pin of the control chip U1, the fourth pin of the signal conversion chip U3 is connected to the 26th pin of the control chip U1, the fifth pin of the signal conversion chip U3 is connected to the 27th pin of the control chip U1, the sixth pin of the signal conversion chip U3 is connected to the 28th pin of the control chip U1, and the 9th, 10th, 11th, 12th, 13th, 15th, 16th, 18th and 19th pins of the signal conversion chip U3 are connected to the input end of the motor drive circuit.

7. The intelligent garbage collection bin cover switch control circuit according to claim 6, characterized in that: The motor pre-drive circuit also includes a diode D4, a diode D3, a diode D2, a capacitor C11, a capacitor C10, a capacitor C9 and a resistor R21. The power supply is connected to one end of the resistor R21. The other end of the resistor R21 is respectively connected to the positive electrodes of the diode D4, the diode D3 and the diode D2. The cathode of the diode D4 is respectively connected to the 20th pin of the signal conversion chip U3 and one end of the capacitor C11. The other end of the capacitor C11 is respectively connected to the 18th pin of the signal conversion chip U3 and the The cathode of the diode D3 is connected to the 17th pin of the signal conversion chip U3 and one end of the capacitor C10 respectively, and the other end of the capacitor C10 is connected to the 15th pin of the signal conversion chip U3 and the input end of the motor drive circuit respectively, the cathode of the diode D2 is connected to the 14th pin of the signal conversion chip U3 and one end of the capacitor C9 respectively, and the other end of the capacitor C9 is connected to the 12th pin of the signal conversion chip U3 and the input end of the motor drive circuit respectively.

8. The intelligent garbage collection bin cover switch control circuit according to claim 7, characterized in that: The motor drive circuit includes a field effect transistor Q2, a field effect transistor Q3, a field effect transistor Q4, a field effect transistor Q5, a field effect transistor Q6 and a field effect transistor Q7. The power supply is connected to the source of the field effect transistor Q7, the field effect transistor Q5 and the field effect transistor Q6 respectively. The drain of the field effect transistor Q7, the field effect transistor Q5 and the field effect transistor Q6 is connected to the input end corresponding to the motor respectively. The source of the field effect transistor Q2, the field effect transistor Q3 and the field effect transistor Q4 is connected to the input end corresponding to the motor respectively. The motor input end connected to the source of the field effect transistor Q2 is the same as the motor input end connected to the drain of the field effect transistor Q7. The motor input end connected to the source of the field effect transistor Q3 is the same as the motor input end connected to the drain of the field effect transistor Q5. The motor input end connected to the source of the field effect transistor Q4 is the same as the motor input end connected to the drain of the field effect transistor Q7. The drains of the field effect transistor Q2, the field effect transistor Q3 and the field effect transistor Q4 are connected to one end of the sampling resistor R11 respectively, the other end of the sampling resistor R11 is grounded, the gate of the field effect transistor Q7 is connected to the 18th and 19th pins of the signal conversion chip U3, the gate of the field effect transistor Q5 is connected to the 16th and 15th pins of the signal conversion chip U3, the gate of the field effect transistor Q6 is connected to the 13th and 12th pins of the signal conversion chip U3, the gate of the field effect transistor Q2 is connected to the 11th pin of the signal conversion chip U3, the gate of the field effect transistor Q3 is connected to the 10th pin of the signal conversion chip U3, and the gate of the field effect transistor Q4 is connected to the 9th pin of the signal conversion chip U3.

9. The intelligent garbage collection bin cover switch control circuit according to claim 8, characterized in that: The motor pre-drive circuit also includes a resistor R20, a resistor R19, a resistor R18, a resistor R17, a resistor 16, a resistor 15, a resistor 14, a resistor 13, a resistor 12, a resistor 10, a resistor 9 and a resistor 8. One end of the resistor R20 is connected to the 13th pin of the signal conversion chip U3, and the other end of the resistor R20 is connected to the gate of the field effect tube Q6. One end of the resistor R19 is connected to the 12th pin of the signal conversion chip U3 and the input end corresponding to the motor. The motor input end connected to the resistor R19 is the same as the motor input end connected to the drain of the field effect tube Q6. The other end of the resistor R19 is respectively connected to the other end of the resistor R20 and the gate of the field effect tube Q6. The gate of the field effect tube Q6 is connected, one end of the resistor R18 is connected to the 9th pin of the signal conversion chip U3, the other end of the resistor R18 is connected to the gate of the field effect tube Q4, one end of the resistor R17 is connected to one end of the sampling resistor R11, the other end of the resistor R17 is respectively connected to the other end of the motor R18 and the gate of the field effect tube Q4, one end of the resistor R16 is connected to the 16th pin of the signal conversion chip U3, the other end of the resistor R16 is connected to the gate of the field effect tube Q5, one end of the resistor R15 is connected to the 15th pin of the signal conversion chip U3 and the input end corresponding to the motor, and the resistor R15 is connected to the gate of the field effect tube Q5. The motor input end is the same as the motor input end connected to the drain of the field effect tube Q5, the other end of the resistor R15 is respectively connected to the other end of the resistor R16 and the gate of the field effect tube Q5, one end of the resistor R14 is connected to the 10th pin of the signal conversion chip U3, the other end of the resistor R14 is connected to the gate of the field effect tube Q3, one end of the resistor R13 is connected to one end of the sampling resistor R11, the other end of the resistor R13 is respectively connected to the other end of the motor R14 and the gate of the field effect tube Q3, one end of the resistor R12 is connected to the 19th pin of the signal conversion chip U3, and the other end of the resistor R12 is connected to the The gate is connected, one end of the resistor R10 is connected to the 18th pin of the signal conversion chip U3 and the input end corresponding to the motor, the motor input end connected to the resistor R10 is the same as the motor input end connected to the drain of the field effect tube Q7, the other end of the resistor R10 is respectively connected to the other end of the resistor R12 and the gate of the field effect tube Q7, one end of the resistor R9 is connected to the 11th pin of the signal conversion chip U3, the other end of the resistor R9 is connected to the gate of the field effect tube Q2, one end of the resistor R8 is connected to one end of the sampling resistor R11, and the other end of the resistor R8 is respectively connected to the other end of the motor R9 and the gate of the field effect tube Q2.

10. A recycling box, characterized in that: It includes a recycling shell body, a recycling box body, an opening and closing cover assembly, a driving control board and a power supply. The driving control board is provided with any of the above-mentioned control circuits for the opening and closing cover of the intelligent garbage recycling box. A layered partition is provided in the recycling shell body. The opening and closing cover assembly and the recycling box body are respectively arranged on the upper and lower sides of the layered partition. A delivery window is provided on the layered partition. The opening and closing cover assembly includes a bin cover and a DC brushless motor. The power supply and the DC brushless motor are electrically connected to the driving control board respectively. A flip driving rod is provided on the bin cover. The moving end of the DC atomizing motor is connected to the flip driving rod. The DC brushless motor can drive the bin cover to flip and seal the delivery window.

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