CN218728694U

CN218728694U - Control circuit of induction type garbage can

Info

Publication number: CN218728694U
Application number: CN202223143333.9U
Authority: CN
Inventors: 江石根; 侯汇宇
Original assignee: Suzhou Gemeixin Microelectronic Co ltd
Current assignee: Suzhou Gemeixin Microelectronic Co ltd
Priority date: 2022-11-25
Filing date: 2022-11-25
Publication date: 2023-03-24
Anticipated expiration: 2032-11-25

Abstract

The application provides a control circuit of an induction type garbage can, wherein an infrared induction circuit and a touch induction circuit are connected with a main control MCU circuit in a bidirectional mode, and the output end of the main control MCU circuit is connected with a motor driving circuit; the control circuit also comprises a passive pyroelectric sensor circuit and a power supply control circuit, wherein the output end of the passive pyroelectric sensor circuit is connected with the input end of the main control MCU circuit, and the passive pyroelectric sensor circuit is used for sending signals to control the dormancy or awakening of a main control MCU chip of the main control MCU circuit; the output end of the power supply circuit is connected with the passive pyroelectric sensor circuit, the main control MCU circuit, the motor driving circuit and the power supply control circuit, the output end of the main control MCU chip is connected with the power supply control circuit, the output end of the power supply control circuit is connected with the infrared sensing circuit and the touch sensing circuit, and the main control MCU chip is used for outputting signals to control the power supply control circuit to be disconnected or conducted, so that the infrared sensing circuit and the touch sensing circuit are controlled to be powered off or powered on.

Description

Control circuit of induction type garbage can

Technical Field

The utility model relates to an electricity field, more specifically relates to a control circuit of induction type garbage bin.

Background

The intelligent garbage bin or induction type garbage bin adopts infrared inductor, triggers one or two kinds in formula inductor or the button usually, opens induction type garbage bin's lid. The automatic opening of the garbage can is realized by mainly adopting an infrared sensor and placing hands above the garbage can; in addition, trigger formula inductor or button play supplementary effect, and wherein trigger formula inductor is also an intelligent response mode, when infrared induction breaks down, plays supplementary reserve effect, and this is very common on market. For example, patent CN207943440U discloses a switching control circuit of response garbage bin that uncaps and garbage bin thereof, carries out infrared induction through infrared emission module and infrared receiving and amplification module, when having the object to appear in its detection range, signals to little control module (be the singlechip), little control module signals and opens motor drive module, and motor drive module opens the motor and begins work, realizes automatic uncapping. Meanwhile, the key module is assisted, and when the key is pressed down, the key sends a signal to the micro control module to start the motor.

The induction type control circuit generally comprises induction modules such as infrared induction and touch induction, the induction modules are triggered artificially and then send signals to the MCU, and the MCU starts the motor or the motor with the cover opened. For example, patent CN209973391U discloses an inductive trash can capable of remotely controlling parameters, which has an infrared sensing module and a remote controller, and sends a control signal to an MCU through the two triggering modes, and the MCU then controls a motor driving module to drive a motor. However, in the control circuit of fig. 1 and the prior art, when no one uses the trash can, in the first aspect, the sensing module is continuously operated and continuously consumes power, for example, the infrared sensing module is continuously transmitting and receiving signals, and the processing chip is continuously operated, which is generally disposed in the infrared sensing module or integrated in the microprocessor, but is continuously operated and calculates the time difference between infrared transmission and reception and whether the threshold value is reached and the analog-to-digital conversion. For example, the capacitive touch sensing module continuously monitors the capacitance of the contact terminal, and the processing chip thereof continuously senses the frequency change and determines whether the threshold is reached. In a second aspect, the master MCU/microprocessor also operates continuously to scan/search the sensing module, for example, once every 30ms, every scan, if the sensing module is not triggered, the sensing module does not send a signal to the master MCU, and if the sensing module is triggered, the sensing module sends a signal to the master MCU. Through detection, when the induction type garbage can is not used by people, the power consumption is 100uA-300uA, the power consumption is large, and the induction type garbage can is not beneficial to energy conservation, and is particularly suitable for battery power supply.

In view of this, the utility model provides a control circuit of induction type garbage bin, when nobody appears, main control MCU gets into the dormant state to the power of response module is cut off in step, very big reduction consumption; when someone appears, the master control MCU and the induction module start to work normally, and power consumption is reduced while normal use is not influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a control circuit of an induction type garbage can, when nobody appears, a main control MCU enters a dormant state and synchronously cuts off the power supply of an induction module, thereby greatly reducing the power consumption; when someone appears, the master control MCU and the induction module start to work normally, and power consumption is reduced while normal use is not influenced.

The utility model provides a power supply unit's low-power consumption control circuit, first aspect, this application has designed and has adopted passive pyroelectric sensor circuit to detect whether someone is close to, and its self is because it is extremely low to detect the consumption passively, sends low level to main control MCU when nobody is close to, sends high level to main control MCU when someone is close to, corresponding control main control MCU's dormancy with awaken up, main control MCU dormancy stop work reduces the consumption when nobody is close to. In the second aspect, the power control circuit is designed, the power control circuit is controlled to be disconnected or connected through the output signal of the main control MCU chip, the main control MCU chip is disconnected when in dormancy and does not supply power to the infrared sensing circuit and the touch sensing circuit, the infrared sensing circuit and the touch sensing circuit stop working when no person approaches, the power consumption is reduced, and the power consumption of the garbage can is reduced to 10uA-20uA when no person approaches. Third aspect, this application has designed packing switch circuit, heating drive circuit and fan drive circuit, through pressing touch sensing circuit's touch key for a long time, realizes receiving rubbish automatically and overlaps the disposal bag automatically, improves intellectuality. The present applicant has completed the present application on this basis.

A control circuit for an inductive trash can, comprising: the touch control circuit comprises an infrared induction circuit, a touch induction circuit, a power supply circuit, a main control MCU circuit and a motor drive circuit, wherein the infrared induction circuit and the touch induction circuit are connected with the main control MCU circuit in a bidirectional way, and the output end of the main control MCU circuit is connected with the motor drive circuit; the control circuit also comprises a passive pyroelectric sensor circuit and a power supply control circuit, wherein the output end of the passive pyroelectric sensor circuit is connected with the input end of the main control MCU circuit, and the passive pyroelectric sensor circuit is used for sending signals to control the dormancy or awakening of a main control MCU chip of the main control MCU circuit; the output end of the power circuit is connected with the passive pyroelectric sensor circuit, the main control MCU circuit, the motor driving circuit and the power control circuit, the output end of the main control MCU chip is connected with the power control circuit, the output end of the power control circuit is connected with the infrared sensing circuit and the touch sensing circuit, and the main control MCU chip is used for outputting signals to control the power control circuit to be disconnected or conducted, so that the infrared sensing circuit and the touch sensing circuit are controlled to be powered off or powered on.

In some embodiments, the passive pyroelectric sensor circuit comprises a passive infrared pyroelectric sensor PIR1 and a processing chip U1, an output end of the passive infrared pyroelectric sensor PIR1 is connected with the processing chip U1, an output end of the processing chip U1 is connected with a main control MCU chip, and the processing chip U1 is configured to output a low level to the main control MCU chip when no human body approaches and output a high level to the main control MCU chip when a human body approaches; and the master control MCU chip is used for enabling the low level to enter a dormant state for continuously inputting N time and awakening when the high level is input, wherein N is more than or equal to 3 seconds.

Further, the processing chip U1 includes a differential input high impedance unit, an ADC sampling chip, and a converter, where the differential input high impedance unit is configured to output an REL level when a differential analog signal exceeds a set digital threshold, the ADC sampling chip is configured to filter and amplify the REL level, and the converter is configured to convert the analog signal into a digital signal.

In some embodiments, the input end of the power circuit is connected to a battery power supply or a mains supply, the power circuit performs voltage reduction or/and conversion, one output end of the power circuit is connected to the passive pyroelectric sensor circuit, the main control MCU circuit and the motor driving circuit to provide electric energy for the power circuit, the other output end of the power circuit is connected to the input end of the power control circuit, the output end of the main control MCU chip is connected to the input end of the power control circuit, and the main control MCU chip is used for outputting a signal to control the power control circuit to be disconnected while entering a sleep mode, and outputting a signal to control the power control circuit to be connected after being awakened.

Further, the power supply circuit includes: inductance L1, electric capacity C1, step-down chip U2 and electric capacity C2 are constituteed, inductance L1 and electric capacity C1 are used for filtering the power of input, step-down chip U2 is used for reducing voltage to 3V direct current output, electric capacity C2 is used for filtering the power of output, step-down chip U2's output VDD foot and passive pyroelectric sensor circuit, master control MCU circuit and motor drive circuit are connected, this output still is connected with power control circuit.

Furthermore, the source electrode of the MOS tube Q1 of the power supply control circuit is connected with the output end of the power supply circuit, the grid electrode of the MOS tube Q1 of the power supply control circuit is connected with the output end of the main control MCU chip through a resistor R2, the main control MCU chip inputs the disconnection of the high-level MOS tube Q1 and inputs the conduction of the low-level MOS tube Q1, and the drain electrode of the MOS tube Q1 outputs 3V direct current to the infrared sensing circuit and the touch sensing circuit through a VDD1 wire.

In some embodiments, after the main control MCU circuit is awakened, the infrared sensing circuit is used to open the motor driving circuit through the main control MCU circuit after being triggered to open the cover, and the touch sensing circuit is used to open the motor driving circuit through the main control MCU circuit after being triggered by a click touch to open the cover.

Further, infrared induction circuit includes infrared emitting diode D11, infrared receiving diode D12 and infrared chip U3, infrared emitting diode D11 and infrared receiving diode D12 are connected with infrared chip U3 respectively, infrared emitting diode D11 is used for infrared light transmission, infrared receiving diode D12 is used for receiving infrared light, infrared chip U3 is used for judging whether there is the human body to be close according to whether the time difference of infrared transmission and receipt reaches the threshold value, output low level to main control MCU chip when no object is close to, output high level to main control MCU chip when having the object to be close to. The master control MCU chip sends a signal to the electrode driving circuit to start the motor.

Further, the touch sensing circuit comprises a touch key J21, a capacitor C21 and a capacitor touch chip U4, wherein an output end of the touch key J21 is connected with the capacitor touch chip U4, one end of the capacitor C21 is connected with a wire (connection point) connecting the touch key J21 and the capacitor touch chip U4, and the other end of the capacitor C21 is grounded. The capacitance touch chip U4 detects the capacitance of the connection point of the capacitor C21, when a human body touches the touch key J21, the capacitance of the connection point of the capacitor C21 changes, the frequency of the input capacitance touch chip U4 changes, and when the frequency change reaches a threshold value, a signal is sent to the electrode driving circuit to start the motor.

Further, the source electrode of the MOS transistor Q3 of the motor driving circuit is connected with the output end of the power circuit, the gate electrode is connected with the output end of the main control MCU chip through a resistor R31, the drain electrode is connected with the interface J3, the main control MCU chip inputs the disconnection of the high level MOS transistor Q3 and the conduction of the low level MOS transistor Q3, and the interface J3 is connected with the motor.

In some embodiments, the main control circuit further comprises a packing switch circuit, a heating drive circuit and a fan drive circuit, the output end of the main control MCU circuit is connected with the packing switch circuit, the heating drive circuit and the fan drive circuit, the touch sensing circuit is used for being triggered by long pressing and opening the packing switch circuit through the main control MCU circuit to realize automatic packing of the garbage bag, the heating drive circuit is used for driving the heating device to seal the garbage bag after packing is completed, and the fan drive circuit is used for driving the blower to blow air into the garbage bag when a new garbage bag is sleeved.

Further, the packing switch circuit comprises a packing chip U5, the output end of the master control MCU chip is connected with the input end of the packing chip U5, the output end of the packing chip U5 is connected with a packing interface J4, and the packing interface J4 is connected with a packing device.

Further, the source electrode of the MOS tube Q5 of the heating driving circuit is grounded, the gate electrode is connected with the output end of the main control MCU chip through the resistor R51, the drain electrode is connected with the heating interface J5, the main control MCU chip inputs the high-level MOS tube Q5 to be disconnected, the input low-level MOS tube Q5 to be connected, and the heating interface J5 is connected with the heating wire device.

Further, the source electrode of the MOS transistor Q6 of the fan driving circuit is grounded, the gate electrode is connected with the output end of the main control MCU chip through the resistor R61, the drain electrode is connected with the fan interface J6, the main control MCU chip inputs the high level MOS transistor Q6 to be disconnected, the input low level MOS transistor Q6 to be connected, and the fan interface J6 is connected with the fan device.

Drawings

The above described and other features of the present disclosure will be more fully described when read in conjunction with the following drawings. It is appreciated that these drawings depict only several embodiments of the disclosure and are therefore not to be considered limiting of its scope. The present disclosure will be described more clearly and in detail by using the accompanying drawings.

Fig. 1 is a schematic structural diagram of a control circuit of an induction type trash can according to the present application.

Fig. 2 is a circuit diagram of a passive pyroelectric sensor circuit of a control circuit of the inductive trash can of the present application.

Fig. 3 is a circuit diagram of a power supply circuit and a power supply control circuit of the induction type trash can of the present application.

Fig. 4 is a circuit diagram of an infrared sensing circuit of the control circuit of the inductive trash can of the present application.

Fig. 5 is a circuit diagram of a touch sensing circuit of the control circuit of the inductive trash can of the present application.

Fig. 6 is a circuit diagram of a motor driving circuit of the control circuit of the induction type trash can of the present application.

Fig. 7 is a circuit diagram of a packing switch circuit of the control circuit of the induction type trash can of the present application.

Fig. 8 is a circuit diagram of a heating driving circuit of the control circuit of the induction type trash can of the present application.

Fig. 9 is a circuit diagram of a fan driving circuit of the control circuit of the inductive trash can according to the present application.

Fig. 10 is a circuit diagram of a main control MCU circuit of the control circuit of the inductive trash can of the present application.

Detailed Description

The following examples are described to aid in the understanding of the present application and are not, and should not be construed to, limit the scope of the present application in any way.

In the following description, those skilled in the art will recognize that components may be described throughout this discussion as separate functional units (which may include sub-units), but those skilled in the art will recognize that various components or portions thereof may be divided into separate components or may be integrated together (including being integrated within a single system or component). Connections between components or systems are not intended to be limited to direct connections, but rather, data between these components may be modified, reformatted, or otherwise changed by intermediate components. Additionally, additional or fewer connections may be used. It should also be noted that the terms "coupled," "connected," or "input" should be understood to include direct connections, indirect connections through one or more intermediate devices, and wireless connections.

Example 1:

a control circuit for an induction trash can, as shown in fig. 1, comprising: the infrared induction circuit and the touch induction circuit are connected with the main control MCU circuit in a bidirectional way, and the output end of the main control MCU circuit is connected with the motor driving circuit; the control circuit further includes: the output end of the passive pyroelectric sensor circuit is connected with the input end of the master control MCU circuit, and the passive pyroelectric sensor circuit is used for sending signals to control the dormancy or awakening of a master control MCU chip of the master control MCU circuit; the output (VDD) of the power circuit is connected with the passive pyroelectric sensor circuit, the master control MCU circuit, the motor driving circuit, the packaging switch circuit, the heating driving circuit, the fan driving circuit is connected with the power control circuit, the output of the master control MCU chip is connected with the input of the power control circuit, the output (VDD 1) of the power control circuit is connected with the infrared sensing circuit and the touch sensing circuit to provide electric energy for the infrared sensing circuit and the touch sensing circuit, and the master control MCU chip is used for outputting signals to control the power control circuit to be disconnected or conducted, so that the infrared sensing circuit and the touch sensing circuit are controlled to be powered off or powered on. The output end of the main control MCU circuit is connected with the packaging switch circuit, the heating drive circuit and the fan drive circuit, the touch sensing circuit is used for being pressed for a long time to trigger the back through the main control MCU circuit to open the packaging switch circuit to realize automatic packaging of the garbage bag, the heating drive circuit is used for driving the heating device to seal the garbage bag after packaging is completed, and the fan drive circuit is used for driving the blower to blow air in the garbage bag when a new garbage bag is sleeved.

As shown in fig. 2, the passive pyroelectric sensor circuit includes a passive infrared pyroelectric sensor PIR1, the passive infrared pyroelectric sensor PIR1 is used for detecting whether a human body approaches, an output end of the passive infrared pyroelectric sensor PIR1 is connected with an input end of a processing chip U1, an output end of the processing chip U1 is connected with an input end of a main control MCU chip through a uc _ PIR pin, the processing chip U1 outputs a low level to the main control MCU chip when no human body approaches, and the processing chip U1 outputs a high level to the main control MCU chip when a human body approaches; and the master control MCU chip is used for enabling the low level to enter a dormant state for continuously inputting N time and awakening when the high level is input, wherein N is more than or equal to 3 seconds. The processing chip U1 includes a differential input high impedance unit for outputting the REL level when the differential analog signal exceeds a set digital threshold, an ADC sampling chip for filtering and signal amplifying the REL level, and a converter (not shown) for converting the analog signal into a digital signal.

As shown in fig. 3, the input terminal V _ BAT pin of the power circuit is connected to the battery power supply, the power circuit performs voltage reduction or/and conversion, and the power circuit includes: the infrared induction circuit comprises an inductor L1, a capacitor C1, a voltage reduction chip U2 and a capacitor C2, wherein the inductor L1 and the capacitor C1 are used for filtering input power, the capacitor C1 is 10uF, the voltage reduction chip U2 is used for reducing voltage to 3V direct current output, the capacitor C2 (22 uF) is used for filtering the output power, the capacitor C2 is 22uF, the output end of the voltage reduction chip U2 is a VDD pin, the VDD pin is connected with a passive pyroelectric sensor circuit, a main control MCU circuit, a motor driving circuit, a packaging switch circuit, a heating driving circuit and a fan driving circuit to provide electric energy for the voltage reduction chip U2, the voltage reduction chip U2 is further connected with the power control circuit, the power control circuit is specifically connected with a source electrode of an MOS (metal oxide semiconductor) tube Q1 of the power control circuit, an output end VDD1_ CTL pin of the main control MCU chip is connected with a resistor R2, the other end of the resistor R2 is connected with a grid electrode of the MOS tube Q1, the resistor R2 is 560K, a drain electrode of the MOS tube Q1 pin, and 3V direct current is output to the infrared induction circuit and the touch induction circuit. The main control MCU chip outputs high level when entering dormancy, and the MOS tube Q1 is disconnected; the main control MCU chip outputs low level after being awakened, and the MOS tube Q1 is conducted. An inductor L2 is connected between the source electrode and the drain electrode of the MOS tube Q1, a resistor R1 is connected between the grid electrode and the source electrode of the MOS tube Q1, and the resistor R1 is 47K.

As shown in fig. 4, the infrared sensing circuit is used for being triggered and then opening the motor driving circuit through the main control MCU circuit to open the cover, the pin 1 of the infrared chip U3 of the infrared sensing circuit is connected with the infrared light emitting diode D11, the other end of the infrared light emitting diode D11 is connected with the pin 8 of the infrared chip U3, the pin 1 and the pin 8 are connected with the capacitor C11, the other end of the capacitor C11 is grounded, and the infrared light emitting diode D11 is used for emitting infrared light. The 3 feet and the 4 feet of the infrared chip U3 are connected with an infrared receiving diode D12, the infrared receiving diode D12 is used for receiving infrared light, the cathode of the infrared receiving diode D12 is connected with an output foot VDD1 of a power control circuit, a capacitor C12 and a capacitor C13 are sequentially connected between the VDD1 and the cathode of the infrared receiving diode D12, the other ends of the capacitor C12 and the capacitor C13 are grounded, the infrared chip U3 is used for judging whether a human body approaches according to whether the time difference between infrared emission and receiving reaches a threshold value, the infrared chip U3 is IN bidirectional connection with a main control MCU chip through uc _ PCB _ IN and uc _ PCB _ OTU, the infrared chip U3 outputs a low level to the main control MCU chip when no object approaches, and outputs a high level to the main control MCU chip when an object approaches.

As shown in fig. 5, the touch sensing circuit is used for being clicked, and after being triggered by touch, the motor driving circuit is started through the main control MCU circuit to open the cover, the touch sensing circuit is used for being pressed by a long time, and after being triggered by touch, the packaging switching circuit is started through the main control MCU circuit to realize automatic packaging of the garbage bag, the main control MCU chip sequentially drives the heating driving circuit to drive the heating device to seal the garbage bag after packaging is completed, and the fan driving circuit drives the blower to blow air into the garbage bag when a new garbage bag is sleeved. The TOUCH sensing circuit comprises a TOUCH key J21, a capacitor C21 and a capacitor TOUCH chip U4, the output end of the TOUCH key J21 is connected with the capacitor TOUCH chip U4, one end of the capacitor C21 is connected with a lead (a connection point) connected with the TOUCH key J21 and the capacitor TOUCH chip U4, the other end of the capacitor C21 is grounded, and the capacitor TOUCH chip U4 is bidirectionally connected with the main control MCU chip through uc _ TOUCH _ IN and uc _ TOUCH _ OUT. The capacitance touch chip U4 detects the capacitance of the connection point of the capacitance C21, after a human body touches the touch key J21, the capacitance of the connection point of the capacitance C21 changes, the frequency of the input capacitance touch chip U4 changes, and when the frequency change reaches a threshold value, a signal is sent to the master control MCU chip which drives the motor driving circuit to start the motor.

Pins

4 and 6 of the capacitive touch chip U4 are respectively connected with the resistor R22 and the resistor R21, the other ends of the resistor R22 and the resistor R21 are grounded, and pin 5 of the capacitive touch chip U4 is connected with a pin VDD1 of an output pin of the power control circuit.

As shown in fig. 6, a source of a MOS transistor Q3 of the motor driving circuit is connected to an output terminal VDD of the power supply circuit, a current fuse F3 is connected between the source of the MOS transistor Q3 and the VDD pin, a diode D31 is connected between the current fuse F3 and the VDD pin, and the other end of the diode D31 is grounded. The gate of MOS pipe Q3 passes through resistance R31 and is connected with the output MAIN _ CTL foot of MAIN control MCU chip, and MOS pipe Q3's drain electrode is connected with interface J3, and MAIN control MCU chip input high level MOS pipe Q3 breaks off, inputs low level MOS pipe Q3 and switches on, and interface J3 is connected with the motor, is connected with resistance R31 between MOS pipe Q3's the source electrode and the gate.

As shown in fig. 7, a packing chip U5 of the packing switch circuit is connected to the main control MCU chip through a BI _ MV pin and an FI _ MV pin, a resistor R41 and a resistor R42 are connected between the packing chip U5 and the BI _ MV pin and the FI _ MV pin, respectively, and pin 1 of the packing chip U5 is connected to a VDD pin at an output terminal of the power circuit. 5 feet and 8 feet of output end of packaging chip U5 are connected with packaging interface J4, and packaging interface J4 is connected with the packaging device. Two bridge arms are connected between the 5 pin and the 8 pin of the packaging chip U5, the first bridge arm is formed by serially connecting a capacitor C41 and a capacitor C42, and the second bridge arm is a capacitor C43.

As shown in fig. 8, the source of the MOS transistor Q5 of the heating driving circuit is grounded, the gate is connected to the output HOT _ CTL pin of the main control MCU chip through the resistor R51, the drain is connected to the heating interface J5, the resistor R52 is connected between the gate and the source of the MOS transistor Q5, the main control MCU chip inputs the high-level MOS transistor Q5 to be disconnected, inputs the low-level MOS transistor Q5 to be connected, and the heating interface J5 is connected to the heating wire device.

As shown in fig. 9, the source of the MOS transistor Q6 of the FAN driving circuit is grounded, the gate is connected to the output terminal FAN _ CTL pin of the main control MCU chip through the resistor R61, the drain is connected to the FAN interface J6, the resistor R62 is connected between the source of the MOS transistor Q6 and the gate, the main control MCU chip inputs the high-level MOS transistor Q6 to be disconnected, the input low-level MOS transistor Q6 to be connected, the FAN interface J6 is connected to the FAN device, and the diode D61 is further connected between the two pins of the FAN interface J6.

As shown in fig. 10, the master control MCU circuit includes a master control MCU chip U7, the master control MCU chip U7 is a 32-bit MCU chip with model number of APT32F1023 from hezhen aeipirt microelectronics ltd, pin 1 of the master control MCU chip U7 is connected to the output terminal VDD pin of the power circuit, a capacitor C71 and a capacitor C72 are connected between pin 1 of the master control MCU chip U7 and the VDD pin, and the other ends of the capacitor C71 and the capacitor C72 are grounded. The 2 pin of the MAIN control MCU chip U7, namely the uc _ PIR pin, is connected with the output end uc _ PIR pin of the passive pyroelectric sensor circuit, the 22 pin of the MAIN control MCU chip U7, namely the VDD1_ CTL pin, is connected with the output end VDD1_ CTL pin of the power control circuit, the 4 pin and the 5 pin of the MAIN control MCU chip U7, namely the uc _ PCB _ IN and uc _ PCB _ OUT pins, are bidirectionally connected with the infrared sensing circuit, the 7 pin and the 8 pin of the MAIN control MCU chip U7, namely the uc _ TOUCH _ IN and uc _ TOUCH _ OUT pins, are bidirectionally connected with the TOUCH sensing circuit, the 21 pin of the MAIN control MCU chip U7, namely the MAIN _ CTL outputs signals to the motor driving circuit, the 19 pin and the 18 pin of the MAIN control MCU chip U7, namely the BI _ MV and FI _ MV output signals to the packing switch circuit, the 15 pin of the MAIN control MCU chip U7, namely the HOT _ CTL pin outputs signals to the heating driving circuit, and the 14 pin of the MCU chip U7, namely the FAN _ CTL outputs signals to the FAN driving circuit.

While various aspects and embodiments have been disclosed herein, it will be apparent to those skilled in the art that other aspects and embodiments can be made without departing from the spirit of the disclosure, and that several modifications and improvements can be made without departing from the spirit of the disclosure. The various aspects and embodiments disclosed herein are presented by way of example only and are not intended to limit the present disclosure, which is to be controlled in the spirit and scope of the appended claims.

Claims

1. A control circuit for an inductive trash can, comprising: the infrared induction circuit and the touch induction circuit are connected with the main control MCU circuit in a bidirectional way, and the output end of the main control MCU circuit is connected with the motor driving circuit; the control circuit is characterized by further comprising a passive pyroelectric sensor circuit and a power supply control circuit, wherein the output end of the passive pyroelectric sensor circuit is connected with the input end of the master control MCU circuit, and the passive pyroelectric sensor circuit is used for sending signals to control the dormancy or awakening of a master control MCU chip of the master control MCU circuit; the output end of the power circuit is connected with the passive pyroelectric sensor circuit, the main control MCU circuit, the motor driving circuit and the power control circuit, the output end of the main control MCU chip is connected with the power control circuit, the output end of the power control circuit is connected with the infrared sensing circuit and the touch sensing circuit, and the main control MCU chip is used for outputting signals to control the power control circuit to be disconnected or conducted, so that the infrared sensing circuit and the touch sensing circuit are controlled to be powered off or powered on.

2. The control circuit of the inductive trash can of claim 1, wherein the passive pyroelectric sensor circuit comprises a passive infrared pyroelectric sensor PIR1 and a processing chip U1, an output end of the passive infrared pyroelectric sensor PIR1 is connected with the processing chip U1, an output end of the processing chip U1 is connected with a main control MCU chip, and the processing chip U1 is used for outputting a low level to the main control MCU chip when no human body approaches and outputting a high level to the main control MCU chip when a human body approaches; and the master control MCU chip is used for enabling the low level to enter a dormant state for continuously inputting N time and awakening when the high level is input, wherein N is more than or equal to 3 seconds.

3. The control circuit of the inductive trash can of claim 1, wherein an input end of the power circuit is connected to a battery power supply or a mains supply, the power circuit performs voltage reduction or/and conversion, one output end of the power circuit is connected to the passive pyroelectric sensor circuit, the main control MCU circuit and the motor driving circuit to provide power thereto, the other output end of the power circuit is connected to an input end of the power control circuit, an output end of the main control MCU chip is connected to an input end of the power control circuit, and the main control MCU chip is used for outputting a signal to control the power control circuit to be disconnected while entering a sleep mode and outputting a signal to control the power control circuit to be turned on after being awakened.

4. The control circuit of the induction type trash can of claim 3, wherein a source of the MOS transistor Q1 of the power control circuit is connected with an output end of the power circuit, a gate of the MOS transistor Q1 of the power control circuit is connected with an output end of the main control MCU chip through a resistor R2, the main control MCU chip inputs the high-level MOS transistor Q1 to be disconnected and inputs the low-level MOS transistor Q1 to be connected, and a drain of the MOS transistor Q1 outputs 3V direct current to the infrared induction circuit and the touch induction circuit through a VDD1 wire.

5. The control circuit of the induction type trash can of claim 1, wherein after the main control MCU circuit is awakened, the infrared sensing circuit is used for opening the motor driving circuit through the main control MCU circuit to open the cover after being triggered, and the touch sensing circuit is used for opening the motor driving circuit through the main control MCU circuit to open the cover after being triggered by clicking touch.

6. The control circuit of the induction type trash can of claim 5, wherein the infrared sensing circuit comprises an infrared light emitting diode D11, an infrared receiving diode D12 and an infrared chip U3, the infrared light emitting diode D11 and the infrared receiving diode D12 are respectively connected with the infrared chip U3, the infrared light emitting diode D11 is used for infrared light emission, the infrared receiving diode D12 is used for receiving infrared light, the infrared chip U3 is used for judging whether a human body approaches according to whether the time difference between the infrared emission and the infrared reception reaches a threshold value, when no object approaches, a low level is output to the main control MCU chip, and when an object approaches, a high level is output to the main control MCU chip.

7. The control circuit of the induction type trash can of claim 5, wherein the touch sensing circuit comprises a touch key J21, a capacitor C21 and a capacitor touch chip U4, an output end of the touch key J21 is connected with the capacitor touch chip U4, one end of the capacitor C21 is connected with a wire connected with the touch key J21 and the capacitor touch chip U4, and the other end of the capacitor C21 is grounded.

8. The control circuit of the induction type trash can of claim 5, wherein a source of the MOS transistor Q3 of the motor driving circuit is connected with an output end of the power circuit, a gate of the MOS transistor Q3 is connected with an output end of the main control MCU chip through a resistor R31, a drain of the MOS transistor Q3 is connected with an interface J3, the main control MCU chip inputs the high-level MOS transistor Q3 to be disconnected, the input low-level MOS transistor Q3 to be connected, and the interface J3 is connected with the motor.

9. The control circuit of the induction type trash can of claim 1, wherein the main control MCU circuit further comprises a packing switch circuit, a heating drive circuit and a fan drive circuit, the output end of the main control MCU circuit is connected with the packing switch circuit, the heating drive circuit and the fan drive circuit, the touch sensing circuit is used for automatically packing the trash bag by starting the packing switch circuit through the main control MCU circuit after being triggered by long pressing touch, the heating drive circuit is used for driving the heating device to seal the trash bag after packing is completed, and the fan drive circuit is used for driving the blower to blow air into the trash bag when a new trash bag is sleeved.

10. The control circuit for an inductive trash can of claim 9, comprising one or more features selected from the group consisting of:

a. the packaging switch circuit comprises a packaging chip U5, the output end of the master control MCU chip is connected with the input end of the packaging chip U5, the output end of the packaging chip U5 is connected with a packaging interface J4, and the packaging interface J4 is connected with a packaging device;

b. the source electrode of an MOS tube Q5 of the heating driving circuit is grounded, the grid electrode of the MOS tube Q5 is connected with the output end of a main control MCU chip through a resistor R51, the drain electrode of the MOS tube Q5 is connected with a heating interface J5, the main control MCU chip inputs a high-level MOS tube Q5 to be disconnected and inputs a low-level MOS tube Q5 to be conducted, and the heating interface J5 is connected with a heating wire device;

c. the source electrode of the MOS tube Q6 of the fan driving circuit is grounded, the grid electrode of the MOS tube Q6 is connected with the output end of the main control MCU chip through the resistor R61, the drain electrode of the MOS tube Q6 is connected with the fan interface J6, the main control MCU chip inputs the disconnection of the high-level MOS tube Q6 and inputs the conduction of the low-level MOS tube Q6, and the fan interface J6 is connected with the fan device.