Drying device for intelligent closestool

Abstract

The drying device mainly comprises a power circuit, a control circuit, a heating wire driving circuit and a brushless motor driving circuit, due to the fact that the two driving circuits are of an independent arrangement structure, a heating wire and a brushless motor with higher power are allowed to be connected, and therefore the heating wire and the brushless motor are not damaged. Alternating current is used for driving a heating wire to generate heat so as to reduce the influence on a rear-end direct-current circuit, high-voltage direct current is used for driving a brushless motor to generate high-speed airflow so as to improve the high-flow-speed blowing capacity, a drying working area can be formed in an intelligent closestool in a high-speed warm air disturbance mode, and therefore the problems encountered in the prior art are solved. The use experience of a user is greatly improved, and a good drying effect can be achieved within a short time.

Description

Technical Field

[0001] The present application relates to the technical field of circuit control of smart toilets, and in particular to a drying device for smart toilets. Background Art

[0002] Smart toilets have been used for a long time. They have brought users the functions of seat heating, automatic flushing and drying. These features have attracted many users to buy them. In the application of smart toilets, flushing and drying functions are important functions that can provide customers with a very comfortable experience.

[0003] However, in actual use, traditional smart toilets still have some shortcomings, especially the drying function. For example, the drying fan uses a 12V low-voltage DC fan. The fan is powered by the smart toilet control motherboard. The motherboard has its own AC to DC power supply, and the power supply power is usually less than 30W. To provide power for the entire control circuit and various DC accessories, this situation is limited by the size of the power supply circuit. The power of the 12V low-voltage DC fan must be controlled within 10W, which will result in low air output power, resulting in too long drying time and low efficiency. It usually takes 4-5 minutes to achieve a better drying effect. Summary of the invention

[0004] The technical problem solved by the present application is: how to solve the problem of low drying efficiency of existing smart toilets. To solve the above problem, the present application provides a drying device for a smart toilet.

[0005] In one embodiment of the present application, a drying device for a smart toilet includes:

[0006] Power circuits for obtaining alternating current and converting it into direct current;

[0007] A control circuit, used for simultaneously generating a first driving signal and a second driving signal;

[0008] a heating wire driving circuit, connected to the power supply circuit and acquiring alternating current, and used for transmitting alternating current energy to the heating wire under the driving of the first driving signal generated by the control circuit;

[0009] a brushless motor drive circuit connected to the power supply circuit and acquiring direct current, and used for transmitting direct current power to the brushless motor under the drive of the second drive signal generated by the control circuit;

[0010] Among them, the heating wire and the brushless motor are used to cooperate to generate high-speed warm air and form a drying work area in the smart toilet.

[0011] Furthermore, the power supply circuit includes a plug AC_IN, a transformer L1, a rectifier bridge DB1, a voltage regulator Q1, a voltage regulator chip U2, capacitors C1, C3, C17, C18, C19, C20, CX1, CE1, C12, and resistors R1, R2, R3, R4, R5, R21, R22, R23 and an inductor L2;

[0012] The plug AC_IN is used to access the power grid to obtain AC power, and is connected to the input end of the transformer L1 through two phase lines, the capacitor CX1 is connected in parallel with the input end of the transformer L1, and the resistors R1 and R2 are connected in series and connected in parallel to the input end of the transformer L1; the output end of the transformer L1 is connected to the input end of the rectifier bridge DB1 through two phase lines, and the output end of the rectifier bridge DB1 is respectively connected in parallel with the capacitor CE1, the capacitor C17, and the capacitor C18, and the output end of the rectifier bridge DB1 is respectively formed with a DC common terminal V_BUS and a ground terminal GND;

[0013] One of the two-phase lines of the plug AC_IN is connected to the ground terminal GND through resistors R3, R4, and R5 connected in series in sequence. The connection between the resistors R4 and R5 is connected to the base of the voltage regulator Q1. The base of the voltage regulator Q1 is connected to the ground terminal GND through the capacitor C1 and to the collector of the voltage regulator Q1 through the resistor R21. The capacitor C3 is connected in parallel between the collector and emitter of the voltage regulator Q1 and the emitter is connected to the ground terminal GND. The collector of the voltage regulator Q1 is connected to one end of the resistor R22, and the other end of the resistor R22 forms a +5V DC working voltage;

[0014] The voltage regulator chip U2 has a VOUT terminal, a D terminal and an S terminal. The D terminal of the voltage regulator chip U2 is connected to the DC common terminal V_BUS formed by the rectifier bridge DB1 and is connected to the S terminal of the voltage regulator chip U2 through the capacitor C20. The S terminal of the voltage regulator chip U2 is connected to one end of the inductor L2. The other end of the inductor L2 is connected to the VOUT terminal of the voltage regulator chip U2 through the resistor R23 and is connected to the ground terminal GND through the capacitors CE2 and C19 arranged in parallel. The other end of the inductor L2 forms a DC working voltage of +13V.

[0015] Furthermore, the heating wire driving circuit includes a heating wire interface J6, a bidirectional trigger diode T1, an optical coupler U9 and resistors R6, R7 and R8;

[0016] The heating wire interface J6 can be connected to the heating wire, and is connected to the plug AC_IN of the power circuit through two phase lines, and one of the two phase lines of the heating wire interface J6 is connected in series with a bidirectional trigger diode T1;

[0017] The optocoupler U9 includes two light-emitting ends and two photosensitive ends. One photosensitive end of the optocoupler U9 is connected to one end of the bidirectional trigger diode T1, and the other photosensitive end of the optocoupler U9 is connected to the other end of the bidirectional trigger diode T1 through resistors R7 and R6 in sequence. One light-emitting end of the optocoupler U9 is connected to the +5V DC working voltage formed in the power supply circuit through resistor R8, and the other light-emitting end of the optocoupler U9 is connected to the control circuit and obtains the first drive signal.

[0018] Further, the control circuit includes a single chip microcomputer U1, capacitors C4, C6, C13, and resistors R17, R18, R19;

[0019] The single-chip computer U1 includes GND terminal, AVDD terminal, VCCLDO terminal, SWDIO terminal, SCR_DIV terminal, SWCLK terminal, OPA1_IP terminal, OPA01_IN / OCP terminal, OPA0_IP terminal, WL terminal, WH terminal, VL terminal, VH terminal, UL terminal, UH terminal, HVDC terminal, Control terminal, IPM_NTC terminal, and Heater_NTC terminal;

[0020] The GND terminal of the single-chip computer U1 is connected to the AVDD terminal of the single-chip computer U1 through the resistor C4 and connected to the ground terminal GND of the power supply circuit. The AVDD terminal of the single-chip computer U1 is connected to the +5V DC working voltage formed in the power supply circuit. The VCCLDO terminal of the single-chip computer U1 is connected to the +13V DC working voltage formed in the power supply circuit and connected to the ground terminal GND of the power supply circuit through the capacitor C13.

[0021] The SCR_DIV terminal of the single chip microcomputer U1 is used to output the first driving signal;

[0022] The WL terminal, WH terminal, VL terminal, VH terminal, UL terminal and UH terminal of the single-chip computer U1 are used to cooperate in outputting the second driving signal;

[0023] The HVDC terminal of the single-chip microcomputer U1 is connected to the DC common terminal V_BUS formed in the power supply circuit through resistors R18 and R17 in sequence, and the HVDC terminal of the single-chip microcomputer U1 is also connected to the ground terminal GND in the power supply circuit through a resistor R19 and a capacitor C6 arranged in parallel.

[0024] Further, the brushless motor drive circuit includes power chips U3, U4, U5, U6, U7, U8, capacitors C7, C8, C9, C10, C11, C12, C14, C15, and resistors R9, R10, R11, R24, R25, R26, RS1, RS2, RS3;

[0025] Power chips U3, U5, and U7 all include VCC, VB, HO, VS, LO, GND, LIN, and HIN terminals. Power chips U4, U6, and U8 all include VCCB, VB, S, G, and D terminals.

[0026] The VCC terminal of the power chip U3 is connected to the +13V DC working voltage formed in the power circuit and is connected to the GND terminal of the power chip U3 through the capacitor C14. The VCC terminal of the power chip U3 is also connected to the VCCB terminal of the power chip U4 through the resistor R9. The VB terminal of the power chip U3 is connected to the VB terminal of the power chip U4 and is connected to the D terminal of the power chip U4 through the capacitor C8. The LO terminal of the power chip U3 is connected to the G terminal of the power chip U4 through the resistor R24. The HO terminal of the power chip U3 is connected to the +13V DC working voltage formed in the power circuit. The DC common terminal V_BUS of the power chip U4 is connected to the ground terminal GND through resistors RS1 and RS3 in sequence; the two ends of the resistor RS1 are connected in parallel with the capacitor C11 and are respectively connected to the OPA1_IP terminal and the OPA01_IN / OCP terminal in the control circuit, and the HIN terminal and the LIN terminal of the power chip U3 are respectively connected to the UH terminal and the UL terminal in the control circuit and are used to obtain the second drive signal; the VS terminal of the power chip U3 is connected to the D terminal of the power chip U4 and forms the U-phase control terminal of the brushless motor;

[0027] The VCC terminal of the power chip U5 is connected to the +13V DC working voltage formed in the power circuit and is connected to the GND terminal of the power chip U5 through the capacitor C7. The VCC terminal of the power chip U5 is also connected to the VCCB terminal of the power chip U6 through the resistor R10. The VB terminal of the power chip U5 is connected to the VB terminal of the power chip U6 and is connected to the D terminal of the power chip U6 through the capacitor C9. The LO terminal of the power chip U5 is connected to the G terminal of the power chip U6 through the resistor R25. The HO terminal of the power chip U5 is connected to the +13V DC working voltage formed in the power circuit. The DC common terminal V_BUS of the power chip U6, the S terminal of the power chip U6 is connected to the ground terminal GND through the resistors RS2 and RS3 in sequence; the two ends of the resistor RS2 are connected in parallel with the capacitor C12 and are respectively connected to the OPA0_IP terminal and the OPA01_IN / OCP terminal in the control circuit, and the HIN terminal and the LIN terminal of the power chip U5 are respectively connected to the VH terminal and the VL terminal in the control circuit and are used to obtain the second drive signal; the VS terminal of the power chip U5 is connected to the D terminal of the power chip U6 and forms the V phase control terminal of the brushless motor;

[0028] The VCC terminal of the power chip U7 is connected to the +13V DC working voltage formed in the power supply circuit and is connected to the GND terminal of the power chip U7 through the capacitor C15. The VCC terminal of the power chip U7 is also connected to the VCCB terminal of the power chip U8 through the resistor R11. The VB terminal of the power chip U7 is connected to the VB terminal of the power chip U8 and is connected to the D terminal of the power chip U8 through the capacitor C10. The LO terminal of the power chip U7 is connected to the G terminal of the power chip U8 through the resistor R26. The HO terminal of the power chip U7 is connected to the DC common terminal V_BUS formed in the power supply circuit, and the S terminal of the power chip U8 is connected to the ground terminal GND through RS3; the HIN terminal and the LIN terminal of the power chip U7 are respectively connected to the WH terminal and the WL terminal in the control circuit and are used to obtain the second drive signal; the VS terminal of the power chip U7 is connected to the D terminal of the power chip U8 and forms the W phase control terminal of the brushless motor;

[0029] The OPA1_IP terminal, OPA01_IN / OCP terminal, and OPA0_IP terminal in the control circuit are used to cooperate in obtaining the feedback signal of the brushless motor drive circuit;

[0030] The U-phase control terminal, the V-phase control terminal and the W-phase control terminal of the brushless motor are used to cooperate in transmitting DC working power to the brushless motor, and the brushless motor can be connected to the ground terminal GND of the power supply circuit.

[0031] Further, the drying device for the smart toilet also includes a thermistor detection circuit, the thermistor detection circuit includes an onboard thermistor detection circuit and an external thermistor detection circuit, the onboard thermistor detection circuit includes a thermistor NTC, a capacitor C5 and a resistor R20, and the external thermistor detection circuit includes a thermistor interface J2, resistors R12, R13 and a capacitor C2;

[0032] One end of the thermistor NTC is connected to the IPM_NTC terminal in the control circuit, and is connected to the +5V DC working voltage formed in the power supply circuit through the resistor R20, the other end of the thermistor NTC is connected to the ground terminal GND in the power supply circuit, and both ends of the thermistor NTC are connected in parallel with the capacitor C5;

[0033] The thermistor interface J2 can be connected to an external thermistor heating wire. The thermistor interface J2 is connected to the heater_NTC terminal in the control circuit through one of the two leads and is connected to the +5V DC working voltage formed in the power supply circuit through the resistor R12. The thermistor interface J2 is connected to the ground terminal GND in the power supply circuit through the other of the two leads. The thermistor interface J2 is connected in parallel to the resistor R13 and the capacitor C2 through the two leads.

[0034] Further, the drying device for the smart toilet also includes an interface circuit, the interface circuit includes an external control interface circuit and a SWD interface circuit, the external control interface circuit includes an external interface J5, an optical coupler U10 and resistors R27, R28, R29, and the SWD interface circuit includes a SWD interface J1;

[0035] The optocoupler U10 includes two light-emitting ends and two photosensitive ends. The external interface J5 is connected to one of the light-emitting ends of the optocoupler U10 through one of the two leads. The external interface J5 is connected to the ground terminal GND in the power supply circuit through the other of the two leads and connected to the other light-emitting end of the optocoupler U10 through a resistor R28. One photosensitive end of the optocoupler U10 is connected to the +5V DC working voltage formed in the power supply circuit through a resistor R27. The other photosensitive end of the optocoupler U10 is connected to the ground terminal GND in the power supply circuit through a resistor R29 and connected to the Control end in the control circuit. The Control end in the control circuit is used to obtain an external control signal from the external interface J5.

[0036] The SWD interface J1 includes two power leads and two signal leads. The two power leads of the SWD interface J1 are respectively connected to the +5V DC working voltage and the ground terminal GND formed in the power supply circuit. The two signal leads of the SWD interface J1 are respectively connected to the SWCLK terminal and the SWDIO terminal in the control circuit. The SWCLK terminal and the SWDIO terminal in the control circuit are used to cooperate in obtaining the serial debugging signal.

[0037] The beneficial effects of this application are:

[0038] According to the above embodiment, a drying device for a smart toilet mainly includes a power supply circuit, a control circuit, a heating wire driving circuit and a brushless motor driving circuit. Due to the independent setting structure of the two driving circuits, it is allowed to connect a heating wire and a brushless motor with higher power. The heating wire is driven by alternating current to generate heat to reduce the impact on the rear-end DC circuit. The brushless motor is driven by high-voltage DC to generate high-speed airflow to improve the high-flow rate blowing capacity. It is very beneficial to form a drying work area in the smart toilet by means of high-speed warm air disturbance, thereby solving the problems encountered in the prior art, greatly improving the user experience, and achieving a good drying effect in a short time. In addition, the device obtains the onboard temperature and warm air temperature in real time through the thermistor detection circuit, which is beneficial to monitoring the drying process to ensure that the device can operate safely. The device also obtains external control signals and serial debugging signals through the interface circuit, which is beneficial to the expansion of its own functions and can improve the compatibility during application.

[0039] The technical solution of this application uses innovative circuit design and interface design, which can simultaneously perform power supply control of the heating wire and the brushless motor, thereby achieving effective adjustment of the wind speed and air outlet temperature. This technical solution can be obtained by modifying the previous intelligent toilet drying control circuit, directly connecting the heating wire to the front-end AC circuit, and using the back-end DC circuit to control the heating wire path / circuit break of the low-voltage signal. In the back-end DC circuit, the low-speed DC motor is abandoned, and high-voltage DC is used to power the high-speed DC brushless motor. In this way, the power supply and interface in the original drying control current can be unchanged, and the circuit modification and device replacement can be achieved, thereby greatly reducing the cost and difficulty of using the technical solution of this application for intelligent toilets, and providing users with more product choices and giving customers a better user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a structural block diagram of a drying device for a smart toilet in one embodiment of the present application;

[0041] Figure 2 A circuit diagram of a power supply circuit in one embodiment of the present application;

[0042] Figure 3 This is a circuit diagram of a heating wire driving circuit in one embodiment of the present application;

[0043] Figure 4 A circuit diagram of a control circuit, a thermal detection circuit, and an interface circuit in one embodiment of the present application;

[0044] Figure 5 1 is a circuit diagram of a brushless motor driving circuit in one embodiment of the present application. DETAILED DESCRIPTION

[0045] In the description of the present invention, it should be understood that the described embodiments are only a part of the embodiments of the present invention, not all the embodiments.

[0046] The technical solution of the present application is further described in detail below through some embodiments and in conjunction with the accompanying drawings.

[0047] Please refer to Figure 1 The present application discloses a drying device for a smart toilet, which mainly includes a power supply circuit 11, a control circuit 13, a heating wire driving circuit 12 and a brushless motor driving circuit 14, which are described below respectively.

[0048] The power supply circuit 11 is used to obtain AC power and convert the AC power into DC power. For example, the power supply circuit 11 can be connected to AC mains (such as AC220V) and complete the conversion of AC to DC through transformation, rectification and other processes.

[0049] The control circuit 13 is used to simultaneously generate a first drive signal and a second drive signal. The control circuit 13 can use a chip such as a single-chip microcomputer, and simultaneously generate the first drive signal and the second drive signal when triggered by an external control signal. This triggering process involves very simple control logic. For example, when a user presses the drying button on the smart toilet, the control circuit 13 generates a first drive signal to the heating wire drive circuit, and simultaneously generates a second control signal to the brushless motor drive circuit. This control logic is a very conventional method, and ordinary technicians can understand and implement it. In addition, the focus of the technical solution of the present application is on the device structure and the circuit structure itself, rather than on how to externally control the trigger and generate the drive signal.

[0050] The heating wire driving circuit 12 is connected to the power supply circuit 11 and obtains AC power, and is used to transmit AC power to the heating wire 15 under the drive of the first driving signal generated by the control circuit 11. It can be understood that when the first driving signal arrives, the heating wire driving circuit 12 transmits AC power to the heating wire 15, so that the heating wire 15 generates heat.

[0051] The brushless motor drive circuit 14 is connected to the power supply circuit 11 and obtains direct current, which is used to transmit direct current power to the brushless motor 18 under the drive of the second drive signal generated by the control circuit 13. It can be understood that when the second drive signal arrives, the brushless motor drive circuit 14 transmits direct current to the brushless motor 18, so that the brushless motor 18 rotates, driving the fan blades to generate high-speed airflow.

[0052] The heating wire and the brushless motor are used to cooperate to generate high-speed warm air and form a drying work area in the smart toilet. It can be understood that the high-speed airflow generated by the rotation of the brushless motor 18 blows the heat generated by the heating wire 15 to form warm air, which can be disturbed in the smart toilet to achieve the drying effect.

[0053] It should be noted that due to the independent setting structure of the two driving circuits, it is possible to connect a more powerful heating wire and a brushless motor, use AC to drive the heating wire to generate heat to reduce the impact on the rear-end DC circuit, and use high-voltage DC to drive the brushless motor to generate high-speed airflow to improve the high-flow rate blowing capacity. This is very beneficial for forming a drying work area in the smart toilet through high-speed warm air disturbance, thereby solving the problems encountered in the prior art, greatly improving the user experience, and achieving a good drying effect in a short time (such as 30-60 seconds).

[0054] In one embodiment, the circuit diagram of the power supply circuit 11 can be referred to as Figure 2, including plug AC_IN, transformer L1, rectifier bridge DB1, voltage regulator Q1, voltage regulator chip U2, capacitors C1, C3, C17, C18, C19, C20, CX1, CE1, CE2, and resistors R1, R2, R3, R4, R5, R21, R22, R23 and inductor L2.

[0055] Plug AC_IN is used to access the power grid to obtain AC power, and is connected to the input end of transformer L1 through two phase lines. Capacitor CX1 is connected in parallel with the input end of transformer L1. Resistors R1 and R2 are connected in series and connected in parallel to the input end of transformer L1. The output end of transformer L1 is connected to the input end of rectifier bridge DB1 through two phase lines. Capacitor CE1, capacitor C17, and capacitor C18 are connected in parallel to the output end of rectifier bridge DB1, and the output end of rectifier bridge DB1 is respectively formed with a DC common terminal V_BUS and a ground terminal GND (or V_Ground terminal). Transformer L1 can use a conventional 35mH transformer, and rectifier bridge DB1 can use a YBS3010 chip, which will not be described in detail here. Plug AC_IN can connect two phase lines through pads L_IN and N_IN respectively, thereby forming an L phase line and an N phase line.

[0056] One of the two phase lines of the plug AC_IN is connected to the ground terminal GND through resistors R3, R4, and R5 connected in series in sequence. The connection between resistors R4 and R5 is connected to the base of the voltage regulator Q1. The base of the voltage regulator Q1 is connected to the ground terminal GND through capacitor C1 and to the collector of the voltage regulator Q1 through resistor R21. The collector and emitter of the voltage regulator Q1 are connected in parallel with capacitor C3, and the emitter is connected to the ground terminal GND. The collector of the voltage regulator Q1 is connected to one end of resistor R22, and the other end of resistor R22 forms a +5V DC working voltage. The voltage regulator Q1 can use a 4.7V NPN triode device, which will not be described in detail here.

[0057] The voltage regulator chip U2 has a VOUT terminal, a D terminal and an S terminal. The D terminal of the voltage regulator chip U2 is connected to the DC common terminal V_BUS formed by the rectifier bridge DB1 and connected to the S terminal of the voltage regulator chip U2 through the capacitor C20. The S terminal of the voltage regulator chip U2 is connected to one end of the inductor L2. The other end of the inductor L2 is connected to the VOUT terminal of the voltage regulator chip U2 through the resistor R23 and connected to the ground terminal GND through the capacitors CE2 and C19 set in parallel. The other end of the inductor L2 forms a +13V DC working voltage. The voltage regulator chip U2 can use the BP8522DFSOP7 model chip, which will not be described in detail here.

[0058] In one embodiment, the heating wire driving circuit 12 can refer to Figure 3 , including heating wire interface J6, bidirectional trigger diode T1, optocoupler U9 and resistors R6, R7, R8.

[0059] The heating wire interface J6 can be connected to the heating wire and connected to the plug AC_IN of the power circuit through two phase lines. One of the two phase lines of the heating wire interface J6 is connected in series with a bidirectional trigger diode T1.

[0060] The optocoupler U9 includes two light-emitting ends and two photosensitive ends. One photosensitive end of the optocoupler U9 is connected to one end of the bidirectional trigger diode T1, and the other photosensitive end of the optocoupler U9 is connected to the other end of the bidirectional trigger diode T1 through resistors R7 and R6 in sequence. One light-emitting end of the optocoupler U9 is connected to the +5V DC working voltage formed in the power supply circuit through resistor R8, and the other light-emitting end of the optocoupler U9 is connected to the control circuit and obtains the first drive signal. The optocoupler U9 can use a chip with a 3063 signal, which will not be described in detail here.

[0061] In one embodiment, the circuit diagram of the control circuit 13 can be found in Figure 4 , including microcontroller U1, capacitors C4, C6, C13, and resistors R17, R18, R19.

[0062] The single-chip microcomputer U1 includes GND terminal, AVDD terminal, VCCLDO terminal, SWDIO terminal, SCR_DIV terminal, SWCLK terminal, OPA1_IP terminal, OPA01_IN / OCP terminal, OPA0_IP terminal, WL terminal, WH terminal, VL terminal, VH terminal, UL terminal, UH terminal, HVDC terminal, Control terminal, IPM_NTC terminal, and Heater_NTC terminal. The single-chip microcomputer U1 can use the LKS32MC037LM6S8B / TSSOP24 chip, which will not be described in detail here.

[0063] The GND end of the microcontroller U1 is connected to the AVDD end of the microcontroller U1 through the resistor C4 and connected to the ground terminal GND of the power supply circuit. The AVDD end of the microcontroller U1 is connected to the +5V DC working voltage formed in the power supply circuit. The VCCLDO end of the microcontroller U1 is connected to the +13V DC working voltage formed in the power supply circuit and connected to the ground terminal GND of the power supply circuit through the capacitor C13.

[0064] The SCR_DIV terminal of the microcontroller U1 can be used to generate a first drive signal, such as a low level signal and transmit it to Figure 3 A light-emitting end of the optocoupler U9 is connected, thereby creating a path between the two photosensitive ends of the optocoupler U9.

[0065] The WL, WH, VL, VH, UL and UH terminals of the single-chip microcomputer U1 are used to cooperate in generating the second drive signal. It can be understood that these six terminals can output high and low levels in a time sequence, the purpose of which is to control the brushless motor to perform fast commutation. This is a common port control method for the single-chip microcomputer to control the brushless motor in a DC mode, which belongs to the prior art, so it will not be described in detail.

[0066] The HVDC terminal of the single-chip computer U1 is connected to the DC common terminal V_BUS formed in the power supply circuit through resistors R18 and R17 in sequence, and the HVDC terminal of the single-chip computer U1 is also connected to the ground terminal GND in the power supply circuit through a resistor R19 and a capacitor C6 arranged in parallel. It can be understood that the HVDC terminal of the single-chip computer U1 can monitor the voltage of the DC common terminal V_BUS.

[0067] It should be noted that the microcontroller U1 can also include other ports, such as ZERO_SCR, RST, LED1, LED2, LED3, etc. These ports can respectively start different functions and can be connected here as needed. They belong to the regular port functions of the microcontroller and will not be described in detail here.

[0068] In one embodiment, the circuit diagram of the brushless motor drive circuit 14 can be referred to as Figure 5 , including power chips U3, U4, U5, U6, U7, U8, capacitors C7, C8, C9, C10, C11, C12, C14, C15, and resistors R9, R10, R11, R24, R25, R26, RS1, RS2, RS3.

[0069] Power chips U3, U5, and U7 all include VCC, VB, HO, VS, LO, GND, LIN, and HIN. Power chips U4, U6, and U8 all include VCCB, VB, S, G, and D. Power chips U3, U5, and U7 can all use LKSM5003NBI chips, where HIN is used as the high-side logic signal input, LIN is used as the low-side logic signal input, VCC is used as the logic and low-side drive power supply, VB is used as the high-side drive power supply, and HO is used as the DC voltage input. For details, please refer to the corresponding instructions of the chip; power chips U4, U6, and U8 can all use LKSM5003NB chips, which will not be described in detail here.

[0070] The VCC terminal of the power chip U3 is connected to the +13V DC working voltage formed in the power supply circuit and is connected to the GND terminal of the power chip U3 through the capacitor C14. The VCC terminal of the power chip U3 is also connected to the VCCB terminal of the power chip U4 through the resistor R9. The VB terminal of the power chip U3 is connected to the VB terminal of the power chip U4 and is connected to the D terminal of the power chip U4 through the capacitor C8. The LO terminal of the power chip U3 is connected to the G terminal of the power chip U4 through the resistor R24. The HO terminal of the power chip U3 is connected to the DC common terminal V_BUS formed in the power supply circuit. The S terminal of the power chip U4 is connected to the ground terminal GND through the resistors RS1 and RS3 in turn; the two ends of the resistor RS1 are connected in parallel with the capacitor C11 and are respectively connected to the OPA1_IP terminal and the OPA01_IN / OCP terminal in the control circuit. The HIN terminal and the LIN terminal of the power chip U3 are respectively connected to the UH terminal and the UL terminal in the control circuit and are used to obtain the second drive signal; the VS terminal of the power chip U3 is connected to the D terminal of the power chip U4 and forms the U-phase control terminal of the brushless motor.

[0071] The VCC terminal of the power chip U5 is connected to the +13V DC working voltage formed in the power circuit and is connected to the GND terminal of the power chip U5 through the capacitor C7. The VCC terminal of the power chip U5 is also connected to the VCCB terminal of the power chip U6 through the resistor R10. The VB terminal of the power chip U5 is connected to the VB terminal of the power chip U6 and is connected to the D terminal of the power chip U6 through the capacitor C9. The LO terminal of the power chip U5 is connected to the G terminal of the power chip U6 through the resistor R25. The HO terminal of the power chip U5 is connected to the +13V DC working voltage formed in the power circuit. The DC common terminal V_BUS is formed, and the S terminal of the power chip U6 is connected to the ground terminal GND through resistors RS2 and RS3 in sequence; the two ends of the resistor RS2 are connected in parallel with the capacitor C12 and are respectively connected to the OPA0_IP terminal and OPA01_IN / OCP terminal in the control circuit, and the HIN terminal and LIN terminal of the power chip U5 are respectively connected to the VH terminal and VL terminal in the control circuit and are used to obtain the second drive signal; the VS terminal of the power chip U5 is connected to the D terminal of the power chip U6 and forms the V phase control terminal of the brushless motor.

[0072] The VCC terminal of the power chip U7 is connected to the +13V DC working voltage formed in the power supply circuit and is connected to the GND terminal of the power chip U7 through the capacitor C15. The VCC terminal of the power chip U7 is also connected to the VCCB terminal of the power chip U8 through the resistor R11. The VB terminal of the power chip U7 is connected to the VB terminal of the power chip U8 and is connected to the D terminal of the power chip U8 through the capacitor C10. The LO terminal of the power chip U7 is connected to the G terminal of the power chip U8 through the resistor R26. The HO terminal of the power chip U7 is connected to the DC common terminal V_BUS formed in the power supply circuit, and the S terminal of the power chip U8 is connected to the ground terminal GND through RS3; the HIN terminal and LIN terminal of the power chip U7 are respectively connected to the WH terminal and WL terminal in the control circuit and are used to obtain the second drive signal; the VS terminal of the power chip U7 is connected to the D terminal of the power chip U8 and forms the W phase control terminal of the brushless motor.

[0073] It should be noted that the OPA1_IP terminal, OPA01_IN / OCP terminal, and OPA0_IP terminal in the control circuit are used to obtain the feedback signal of the brushless motor drive circuit;

[0074] It should be noted that the U-phase control terminal, V-phase control terminal and W-phase control terminal of the brushless motor are used to transmit DC working power to the brushless motor, and the brushless motor can be connected to the ground terminal GND of the power circuit. For example, the casing of the DC brushless motor is connected to the ground terminal.

[0075] In one embodiment, see Figure 1 and Figure 4 The drying device for the smart toilet also includes a thermistor detection circuit 16, which includes an onboard thermistor detection circuit and an external thermistor detection circuit. The onboard thermistor detection circuit includes a thermistor NTC, a capacitor C5 and a resistor R20, and the external thermistor detection circuit includes a thermistor interface J2, resistors R12, R13 and a capacitor C2.

[0076] One end of the thermistor NTC is connected to the IPM_NTC terminal in the control circuit, and is connected to the +5V DC working voltage formed in the power supply circuit through the resistor R20. The other end of the thermistor NTC is connected to the ground terminal GND in the power supply circuit. Both ends of the thermistor NTC are connected in parallel with the capacitor C5. It can be understood that the IPM_NTC terminal is used to monitor the temperature of the circuit board.

[0077] The thermistor interface J2 can be connected to an external thermistor heating wire. The thermistor interface J2 is connected to the heater_NTC terminal in the control circuit through one of the two leads and to the +5V DC working voltage formed in the power circuit through the resistor R12. The thermistor interface J2 is connected to the ground terminal GND in the power circuit through the other of the two leads. The thermistor interface J2 is connected to the resistor R13 and the capacitor C2 in parallel through the two leads. The external thermistor heating wire can be set in the blowing area of ​​the brushless motor to measure the temperature of the warm air. It can be understood that the heater_NTC terminal is used to monitor the temperature of the warm air.

[0078] It can be understood that the device can obtain the onboard temperature based on the onboard thermistor detection circuit, and can obtain the warm air temperature based on the external thermistor detection circuit. This helps monitor the drying process through temperature to ensure that the device can operate safely.

[0079] In one embodiment, see Figure 1 and Figure 4 The drying device for the smart toilet also includes an interface circuit 17, which includes an external control interface circuit and a SWD interface circuit. The external control interface circuit includes an external interface J5, an optical coupler U10, and resistors R27, R28, and R29. The SWD interface circuit includes a SWD interface J1.

[0080] The optocoupler U10 includes two light-emitting ends and two photosensitive ends. The external interface J5 is connected to one of the light-emitting ends of the optocoupler U10 through one of the two leads. The external interface J5 is connected to the ground terminal GND in the power circuit through the other of the two leads and connected to the other light-emitting end of the optocoupler U10 through the resistor R28. One photosensitive end of the optocoupler U10 is connected to the +5V DC working voltage formed in the power circuit through the resistor R27. The other photosensitive end of the optocoupler U10 is connected to the ground terminal GND in the power circuit through the resistor R29 and connected to the Control end in the control circuit; the Control end in the control circuit is used to obtain an external control signal from the external interface J5. It can be understood that the external control signal here can come from the drying button on the smart toilet. When the drying button is triggered, a high level is generated, thereby reaching the Control end in the control circuit, and then the single-chip microcomputer U1 generates a first drive signal through the SCR_DIV end, and generates a second drive signal through the WL end, WH end, VL end, VH end, UL end, and UH end. The optocoupler U10 can use a 3063 signal chip, which will not be described in detail here.

[0081] The SWD interface J1 includes two power leads and two signal leads. The two power leads of the SWD interface J1 are respectively connected to the +5V DC working voltage and the ground terminal GND formed in the power circuit. The two signal leads of the SWD interface J1 are respectively connected to the SWCLK terminal and SWDIO terminal in the control circuit. The SWCLK terminal and SWDIO terminal in the control circuit are used to cooperate in obtaining serial debugging signals. It can be understood that the SWD interface J1 can be connected to the host computer, and the program of the microcontroller U1 can be debugged by transmitting serial debugging signals.

[0082] It can be understood that the device can obtain external control signals based on the external control interface circuit and can obtain serial debugging signals based on the SWD interface circuit. This can be beneficial to the expansion of its own functions and can also be flexibly used in multiple products, thereby improving compatibility during application.

[0083] It can be understood that the drying device mentioned above uses innovative circuit design and interface design, which can simultaneously execute power supply control of the heating wire and the brushless motor, thereby achieving effective adjustment of the wind speed and air outlet temperature.

[0084] It can be understood that in some cases, the above drying device can be obtained based on the previous smart toilet drying control circuit. For example, the heating wire is directly connected to the front-end AC circuit, and the back-end DC circuit is used to control the heating wire path of the low-voltage signal. The low-speed DC motor is abandoned in the back-end DC circuit, and high-voltage DC is used to power the high-speed DC brushless motor. The advantage of such a transformation is that the power supply and interface in the original drying control current are not changed, and the circuit transformation and device replacement can be realized, thereby greatly reducing the cost and difficulty of using the technical solution of this application for smart toilets, and providing users with more product choices and giving customers a better user experience.

[0085] For example, in previous smart toilets, the drying control device uses a 7530 type fan, so here the circuit can be modified by replacing the 7530 fan. The specific method is to use the heating wire terminal on the mainboard to power the drying device, use the 7530 fan drive circuit on the mainboard as the control signal of the drying device, and directly connect the heating wire to the drying device. In this way, the traditional 7530 fan can be directly replaced without changing the mainboard, and the control capability of different wind speeds can be provided conveniently, which has the advantages of simple circuit modification and low promotion and use cost.

[0086] The above contents are further detailed descriptions of the present application in combination with specific implementation methods, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, several simple deductions or substitutions can be made without departing from the inventive concept of the present application.

Claims

1. A drying device for a smart toilet, characterized in that: include: Power circuits for obtaining alternating current and converting it into direct current; A control circuit, used for simultaneously generating a first driving signal and a second driving signal; a heating wire driving circuit, connected to the power supply circuit and acquiring alternating current, and used for transmitting alternating current energy to the heating wire under the driving of the first driving signal generated by the control circuit; a brushless motor drive circuit connected to the power supply circuit and acquiring direct current, and used for transmitting direct current power to the brushless motor under the drive of the second drive signal generated by the control circuit; Among them, the heating wire and the brushless motor are used to cooperate to generate high-speed warm air and form a drying work area in the smart toilet.

2. The drying device for an intelligent toilet according to claim 1, characterized in that: The power supply circuit includes a plug AC_IN, a transformer L1, a rectifier bridge DB1, a voltage regulator Q1, a voltage regulator chip U2, capacitors C1, C3, C17, C18, C19, C20, CX1, CE1, C12, and resistors R1, R2, R3, R4, R5, R21, R22, R23 and an inductor L2; The plug AC_IN is used to access the power grid to obtain AC power, and is connected to the input end of the transformer L1 through two phase lines, the capacitor CX1 is connected in parallel with the input end of the transformer L1, and the resistors R1 and R2 are connected in series and connected in parallel to the input end of the transformer L1; the output end of the transformer L1 is connected to the input end of the rectifier bridge DB1 through two phase lines, and the output end of the rectifier bridge DB1 is respectively connected in parallel with the capacitor CE1, the capacitor C17, and the capacitor C18, and the output end of the rectifier bridge DB1 is respectively formed with a DC common terminal V_BUS and a ground terminal GND; One of the two-phase lines of the plug AC_IN is connected to the ground terminal GND through resistors R3, R4, and R5 connected in series in sequence. The connection between the resistors R4 and R5 is connected to the base of the voltage regulator Q1. The base of the voltage regulator Q1 is connected to the ground terminal GND through the capacitor C1 and to the collector of the voltage regulator Q1 through the resistor R21. The capacitor C3 is connected in parallel between the collector and emitter of the voltage regulator Q1 and the emitter is connected to the ground terminal GND. The collector of the voltage regulator Q1 is connected to one end of the resistor R22, and the other end of the resistor R22 forms a +5V DC working voltage; The voltage regulator chip U2 has a VOUT terminal, a D terminal and an S terminal. The D terminal of the voltage regulator chip U2 is connected to the DC common terminal V_BUS formed by the rectifier bridge DB1 and is connected to the S terminal of the voltage regulator chip U2 through the capacitor C20. The S terminal of the voltage regulator chip U2 is connected to one end of the inductor L2. The other end of the inductor L2 is connected to the VOUT terminal of the voltage regulator chip U2 through the resistor R23 and is connected to the ground terminal GND through the capacitors CE2 and C19 arranged in parallel. The other end of the inductor L2 forms a DC working voltage of +13V.

3. The drying device for an intelligent toilet according to claim 2, characterized in that: The heating wire driving circuit includes a heating wire interface J6, a bidirectional trigger diode T1, an optical coupler U9 and resistors R6, R7 and R8; The heating wire interface J6 can be connected to the heating wire, and is connected to the plug AC_IN of the power circuit through two phase lines, and one of the two phase lines of the heating wire interface J6 is connected in series with a bidirectional trigger diode T1; The optocoupler U9 includes two light-emitting ends and two photosensitive ends. One photosensitive end of the optocoupler U9 is connected to one end of the bidirectional trigger diode T1, and the other photosensitive end of the optocoupler U9 is connected to the other end of the bidirectional trigger diode T1 through resistors R7 and R6 in sequence. One light-emitting end of the optocoupler U9 is connected to the +5V DC working voltage formed in the power supply circuit through resistor R8, and the other light-emitting end of the optocoupler U9 is connected to the control circuit and obtains the first drive signal.

4. The drying device for an intelligent toilet according to claim 2, characterized in that: The control circuit includes a single chip microcomputer U1, capacitors C4, C6, C13, and resistors R17, R18, R19; The single-chip computer U1 includes GND terminal, AVDD terminal, VCCLDO terminal, SWDIO terminal, SCR_DIV terminal, SWCLK terminal, OPA1_IP terminal, OPA01_IN / OCP terminal, OPA0_IP terminal, WL terminal, WH terminal, VL terminal, VH terminal, UL terminal, UH terminal, HVDC terminal, Control terminal, IPM_NTC terminal, and Heater_NTC terminal; The GND terminal of the single-chip computer U1 is connected to the AVDD terminal of the single-chip computer U1 through the resistor C4 and connected to the ground terminal GND of the power supply circuit. The AVDD terminal of the single-chip computer U1 is connected to the +5V DC working voltage formed in the power supply circuit. The VCCLDO terminal of the single-chip computer U1 is connected to the +13V DC working voltage formed in the power supply circuit and connected to the ground terminal GND of the power supply circuit through the capacitor C13. The SCR_DIV terminal of the single chip microcomputer U1 is used to output the first driving signal; The WL terminal, WH terminal, VL terminal, VH terminal, UL terminal and UH terminal of the single-chip computer U1 are used to cooperate in outputting the second driving signal; The HVDC terminal of the single-chip microcomputer U1 is connected to the DC common terminal V_BUS formed in the power supply circuit through resistors R18 and R17 in sequence, and the HVDC terminal of the single-chip microcomputer U1 is also connected to the ground terminal GND in the power supply circuit through a resistor R19 and a capacitor C6 arranged in parallel.

5. The drying device for an intelligent toilet according to claim 4, characterized in that: The brushless motor drive circuit includes power chips U3, U4, U5, U6, U7, U8, capacitors C7, C8, C9, C10, C11, C12, C14, C15, and resistors R9, R10, R11, R24, R25, R26, RS1, RS2, RS3; Power chips U3, U5, and U7 all include VCC, VB, HO, VS, LO, GND, LIN, and HIN terminals. Power chips U4, U6, and U8 all include VCCB, VB, S, G, and D terminals. The VCC terminal of the power chip U3 is connected to the +13V DC working voltage formed in the power circuit and is connected to the GND terminal of the power chip U3 through the capacitor C14. The VCC terminal of the power chip U3 is also connected to the VCCB terminal of the power chip U4 through the resistor R9. The VB terminal of the power chip U3 is connected to the VB terminal of the power chip U4 and is connected to the D terminal of the power chip U4 through the capacitor C8. The LO terminal of the power chip U3 is connected to the G terminal of the power chip U4 through the resistor R24. The HO terminal of the power chip U3 is connected to the +13V DC working voltage formed in the power circuit. The DC common terminal V_BUS of the power chip U4 is connected to the ground terminal GND through resistors RS1 and RS3 in sequence; the two ends of the resistor RS1 are connected in parallel with the capacitor C11 and are respectively connected to the OPA1_IP terminal and the OPA01_IN / OCP terminal in the control circuit, and the HIN terminal and the LIN terminal of the power chip U3 are respectively connected to the UH terminal and the UL terminal in the control circuit and are used to obtain the second drive signal; the VS terminal of the power chip U3 is connected to the D terminal of the power chip U4 and forms the U-phase control terminal of the brushless motor; The VCC terminal of the power chip U5 is connected to the +13V DC working voltage formed in the power circuit and is connected to the GND terminal of the power chip U5 through the capacitor C7. The VCC terminal of the power chip U5 is also connected to the VCCB terminal of the power chip U6 through the resistor R10. The VB terminal of the power chip U5 is connected to the VB terminal of the power chip U6 and is connected to the D terminal of the power chip U6 through the capacitor C9. The LO terminal of the power chip U5 is connected to the G terminal of the power chip U6 through the resistor R25. The HO terminal of the power chip U5 is connected to the +13V DC working voltage formed in the power circuit. The DC common terminal V_BUS of the power chip U6, the S terminal of the power chip U6 is connected to the ground terminal GND through the resistors RS2 and RS3 in sequence; the two ends of the resistor RS2 are connected in parallel with the capacitor C12 and are respectively connected to the OPA0_IP terminal and the OPA01_IN / OCP terminal in the control circuit, and the HIN terminal and the LIN terminal of the power chip U5 are respectively connected to the VH terminal and the VL terminal in the control circuit and are used to obtain the second drive signal; the VS terminal of the power chip U5 is connected to the D terminal of the power chip U6 and forms the V phase control terminal of the brushless motor; The VCC terminal of the power chip U7 is connected to the +13V DC working voltage formed in the power supply circuit and is connected to the GND terminal of the power chip U7 through the capacitor C15. The VCC terminal of the power chip U7 is also connected to the VCCB terminal of the power chip U8 through the resistor R11. The VB terminal of the power chip U7 is connected to the VB terminal of the power chip U8 and is connected to the D terminal of the power chip U8 through the capacitor C10. The LO terminal of the power chip U7 is connected to the G terminal of the power chip U8 through the resistor R26. The HO terminal of the power chip U7 is connected to the DC common terminal V_BUS formed in the power supply circuit, and the S terminal of the power chip U8 is connected to the ground terminal GND through RS3; the HIN terminal and the LIN terminal of the power chip U7 are respectively connected to the WH terminal and the WL terminal in the control circuit and are used to obtain the second drive signal; the VS terminal of the power chip U7 is connected to the D terminal of the power chip U8 and forms the W phase control terminal of the brushless motor; The OPA1_IP terminal, OPA01_IN / OCP terminal, and OPA0_IP terminal in the control circuit are used to cooperate in obtaining the feedback signal of the brushless motor drive circuit; The U-phase control terminal, the V-phase control terminal and the W-phase control terminal of the brushless motor are used to cooperate in transmitting DC working power to the brushless motor, and the brushless motor can be connected to the ground terminal GND of the power supply circuit.

6. The drying device for an intelligent toilet according to claim 4, characterized in that: It also includes a thermistor detection circuit, which includes an onboard thermistor detection circuit and an external thermistor detection circuit. The onboard thermistor detection circuit includes a thermistor NTC, a capacitor C5, and a resistor R20. The external thermistor detection circuit includes a thermistor interface J2, resistors R12, R13, and a capacitor C2. One end of the thermistor NTC is connected to the IPM_NTC terminal in the control circuit, and is connected to the +5V DC working voltage formed in the power supply circuit through the resistor R20, the other end of the thermistor NTC is connected to the ground terminal GND in the power supply circuit, and both ends of the thermistor NTC are connected in parallel with the capacitor C5; The thermistor interface J2 can be connected to an external thermistor heating wire. The thermistor interface J2 is connected to the heater_NTC terminal in the control circuit through one of the two leads and is connected to the +5V DC working voltage formed in the power supply circuit through the resistor R12. The thermistor interface J2 is connected to the ground terminal GND in the power supply circuit through the other of the two leads. The thermistor interface J2 is connected in parallel to the resistor R13 and the capacitor C2 through the two leads.

7. The drying device for an intelligent toilet according to claim 4, characterized in that: It also includes an interface circuit, the interface circuit includes an external control interface circuit and a SWD interface circuit, the external control interface circuit includes an external interface J5, an optical coupler U10, and resistors R27, R28, and R29, and the SWD interface circuit includes a SWD interface J1; The optocoupler U10 includes two light-emitting ends and two photosensitive ends. The external interface J5 is connected to one of the light-emitting ends of the optocoupler U10 through one of the two leads. The external interface J5 is connected to the ground terminal GND in the power supply circuit through the other of the two leads and connected to the other light-emitting end of the optocoupler U10 through a resistor R28. One photosensitive end of the optocoupler U10 is connected to the +5V DC working voltage formed in the power supply circuit through a resistor R27. The other photosensitive end of the optocoupler U10 is connected to the ground terminal GND in the power supply circuit through a resistor R29 and connected to the Control end in the control circuit. The Control end in the control circuit is used to obtain an external control signal from the external interface J5. The SWD interface J1 includes two power leads and two signal leads. The two power leads of the SWD interface J1 are respectively connected to the +5V DC working voltage and the ground terminal GND formed in the power supply circuit. The two signal leads of the SWD interface J1 are respectively connected to the SWCLK terminal and the SWDIO terminal in the control circuit. The SWCLK terminal and the SWDIO terminal in the control circuit are used to cooperate in obtaining the serial debugging signal.

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