Intelligent closestool controller with ultra-low power consumption

Abstract

The utility model discloses an intelligent closestool controller with ultra-low power consumption, and belongs to the technical field of closestool control. The technical problem of energy supply of electric devices of the intelligent closestool is solved. According to the technical scheme, a power supply module comprises a battery power supply circuit and a voltage stabilizing circuit, the battery power supply circuit comprises four AAA and AA dry batteries or a lithium battery for power supply when 4.5 V-6V is needed, a 9V square dry battery is adopted for power supply when 6V-9V is needed, and the voltage stabilizing circuit adopts a low dropout regulator for converting 4.5 V-10V input power into a stable power supply available for a single chip microcomputer. The main control module comprises a single-chip microcomputer circuit, the switching circuit comprises a key or a kicking mechanical switch which is matched with a switching tube to realize circuit switching control, and the switching circuit is connected with the main control module and is used for inputting a control signal; the battery voltage monitoring module is connected with the main control module and used for inputting an electric quantity signal, the flushing accessory is connected with the main control module and used for flushing control, and the effects of reducing energy consumption and saving energy are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of toilet control, in particular to a super low power consumption intelligent toilet controller. BACKGROUND

[0002] The current intelligent toilet development has experienced many periods from the evolution of functions, from the initial basic functions (i.e. cleaning, drying, seat heating, flushing, etc.) period, to the development of various convenient and sanitary functions (automatic sensing, sterilization, disinfection, etc.), to the emergence of light intelligent toilets, which have undergone numerous optimizations in terms of functions, and finally to an economical and practical simple function (i.e. only seat heating and flushing function) intelligent toilet. In many tropical regions, seat heating is actually not needed, so the intelligent toilet can be further simplified to a single flushing function.

[0003] The current intelligent toilet can only obtain AC power from the municipal power grid for work, which requires that the client installing the toilet have a municipal power supply to allow the intelligent toilet to operate normally. Therefore, it is very inconvenient to install an intelligent toilet in the old-style toilet of an old-style community.

[0004] If the current intelligent toilet does not use mains power, it will have a very short use cycle when using only the backup power supply. The reason is that the intelligent toilet is always pursuing high performance while being in a continuous power consumption state for real-time monitoring, which cannot achieve energy saving effect. Because of the above factors, if only the battery is used to power the intelligent toilet, the battery of the intelligent toilet will soon be consumed, and it is impossible to achieve continuous power supply, and the mains power must be used for continuous power supply. CONTENT OF THE UTILITY MODEL

[0005] In order to solve the above technical problems and shortcomings: how to be more energy-saving and reduce power consumption based on some power consumption of the intelligent toilet, the present application provides a super low power consumption intelligent toilet controller.

[0006] To achieve the above object and other related objects, the present application adopts the following technical scheme:

[0007] A super low power consumption intelligent toilet controller, comprising a power supply module, a main control module, a switching circuit, a battery voltage monitoring module and a flushing accessory, the power supply module comprising a battery power supply circuit and a voltage stabilizing circuit, the battery power supply circuit comprising 4 AAA, AA dry batteries or lithium batteries for power supply when 4.5V-6V is required, and 9V square dry batteries for power supply when 6V-9V is required, and the voltage stabilizing circuit adopting a low dropout linear voltage stabilizer for converting 4.5V-10V input power into a stable power source available for a single-chip microcomputer,

[0008] The main control module comprises a single-chip microcomputer circuit, and the switch circuit comprises a key or a kick mechanical switch matched with a switch tube to realize circuit switch control.

[0009] The switch circuit is connected with the main control module to input a control signal; the battery voltage monitoring module is connected with the main control module to input a power signal; and the flushing accessory is connected with the main control module to control flushing.

[0010] Preferably, the battery voltage monitoring module comprises a capacitor C1, a resistor R2 and a resistor R6, one end of the capacitor C1 is connected with a power detection point and one end of the resistor R2, the other end of the capacitor C1 is grounded, the other end of the resistor R2 is connected with one end of the resistor R6 and an adopting pin of the single-chip microcomputer circuit, and the other end of the resistor R6 is grounded.

[0011] Preferably, the switch circuit comprises a first switch module and / or a second switch module, the first switch module comprises a transistor Q1, a resistor R4, a resistor R1, a resistor R7, a capacitor C5, a diode D1 and a transistor Q2, one end of the capacitor C5 and a collector of the transistor Q1 are connected with a second voltage source, an emitter of the transistor Q1 is connected with one end of the resistor R4 and a third voltage source, the other end of the resistor R4 is connected with one end of the resistor R1 and a base of the transistor Q1, the other end of the resistor R1 is connected with an anode of the diode D1 and a collector of the transistor Q2, a cathode of the diode D1 is connected with one pin of the single-chip microcomputer circuit, an emitter of the transistor Q2 and the other end of the capacitor C5 are grounded, and a base of the transistor Q2 is connected with one key pin of the single-chip microcomputer circuit through the resistor R7;

[0012] The second switch module comprises a resistor R9, a resistor R5, a transistor Q3 and a key SW1, one end of the key and an emitter of the transistor Q3 and one end of the resistor R5 are grounded, the other end of the resistor R5 is connected with one end of the resistor R9 and a base of the transistor Q3, a collector of the transistor Q3 is connected with the other end of the key SW1, and the other end of the resistor R9 is connected with another key pin of the single-chip microcomputer circuit.

[0013] Preferably, a plurality of drive circuits are further connected with the single-chip microcomputer circuit, the drive circuits are connected with the flushing accessory through an interface, the flushing accessory is a pulse valve, and the drive circuit comprises a drive chip, and the drive chip is a TPM8837.

[0014] Preferably, a power supply voltage source of the single-chip microcomputer circuit is 3.3V.

[0015] Preferably, a power supply voltage source of the flushing accessory is 6V.

[0016] In summary, the application has at least one of the following beneficial technical effects:

[0017] 1, This scheme can develop a new toilet, the main advantage is: old community toilet, (because no power) is not suitable for installation (valve flush) intelligent toilet, this product will be very suitable for installation, farewell to the huge water tank, directly using the space occupied by the pulse valve (or pressure bag water tank).

[0018] 2, This scheme uses super energy-saving circuit and accessories, the overall power efficiency is more energy-saving than ordinary intelligent toilet. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the circuit hardware module block diagram of the embodiment of the present invention;

[0020] Figure 2 is the first part of the circuit diagram of the embodiment of the present invention;

[0021] Figure 3 is the second part of the circuit diagram of the embodiment of the present invention;

[0022] Figure 4 is the third part of the circuit diagram of the embodiment of the present invention.

[0023] Explanation of reference numerals of main components:

[0024] 100, power supply module; 101, battery power supply circuit; 102, voltage stabilizing circuit; 201, single-chip microcomputer circuit; 300, switch circuit; 301, first switch module; 302, second switch module; 400, battery voltage monitoring module; 500, pulse valve; 600, drive circuit. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described below through specific concrete examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the disclosure of the present specification. The present invention can also be implemented or applied through other different specific embodiments, and each detail in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following examples and features in the examples can be combined with each other without conflict.

[0026] It should be noted that the diagrams provided in the following examples only illustrate the basic concept of the present invention in a schematic manner, and the diagrams only show the components related to the present invention, not the number, shape and size of the components when actually implemented. The shape, number and proportion of each component can be changed arbitrarily when actually implemented, and the layout pattern of the components can also be more complex.

[0027] The specific embodiments of the present invention are further described below in conjunction with the drawings.

[0028] Embodiments of the present application disclose a super low power consumption intelligent toilet controller, referring to

[0029] The embodiments of the present application disclose a super low power consumption intelligent toilet controller, referring to Figure 1 The power supply module 100 includes a battery power supply circuit 101 and a voltage stabilizing circuit 102. The battery power supply circuit 101 includes four AAA or AA dry batteries or a lithium battery for supplying power when a voltage of 4.5V-6V is required, and a 9V square dry battery for supplying power when a voltage of 6V-9V is required. The voltage stabilizing circuit 102 is a low-dropout linear voltage stabilizer for converting a 4.5V-10V input power into a stable power source available for a single-chip microcomputer. The low-dropout linear voltage stabilizer is a chip U4, which converts a 6V input voltage into a 3.3V output voltage, that is, +3V3 in Figure 2

[0030] The main control module includes a single-chip microcomputer circuit 201, the switch circuit 300 includes a key or a kick mechanical switch cooperating with a switch tube to realize circuit switch control, and the switch circuit 300 is connected to the main control module for inputting a control signal. The battery voltage monitoring module 400 is connected to the main control module for inputting a power signal, and the flushing accessory is connected to the main control module for flushing control.

[0031] Specifically, referring to Figure 2 The battery voltage monitoring module 400 includes a capacitor C1, a resistor R2 and a resistor R6. One end of the capacitor C1 is connected to a power detection point and one end of the resistor R2, the other end of the capacitor C1 is grounded, the other end of the resistor R2 is connected to one end of the resistor R6 and a pin of the single-chip microcomputer circuit 201, and the other end of the resistor R6 is grounded. The power detection point is a battery output end, and in this embodiment, a 6V power output is taken as an example for description. 6V-AD is a power voltage sampling signal.

[0032] In the present scheme, the power supply voltage source of the single-chip microcomputer circuit 201 is 3.3V. The power supply voltage source of the flushing accessory is 6V.

[0033] In Figure 2 The switch circuit 300 includes a first switch module 301 and / or a second switch module 302.

[0034] ​The first switch module 301 comprises a transistor Q1, a resistor R4, a resistor R1, a resistor R7, a capacitor C5, a diode D1, a transistor Q2, one end of the capacitor C5 and the collector of the transistor Q1 are connected to the second voltage source, one end of the resistor R4 and the emitter of the transistor Q1 are connected to the third voltage source, the other end of the resistor R4, one end of the resistor R1 and the base of the transistor Q1 are connected, the other end of the resistor R1, the anode of the diode D1 and the collector of the transistor Q2 are connected, the cathode of the diode D1 is used to connect a pin of the single-chip microcomputer circuit 201, the emitter of the transistor Q2 and the other end of the capacitor C5 are grounded, and the base of the transistor Q2 is connected to a key pin of the single-chip microcomputer circuit 201 through the resistor R7. The VCC voltage source is a 3.3V voltage. The VBAT-K is a feedback signal representing a battery, which is directly provided to the single-chip microcomputer circuit 201, so that the single-chip microcomputer can directly obtain whether the voltage stabilizing chip U4 works normally. In addition, the signal KEY1 can be sent by the single-chip microcomputer circuit 201, so as to control the transistor Q2 to be turned on. The first switch module 301 is a switch controlled by the single-chip microcomputer.

[0035] The second switch module 302 comprises a resistor R9, a resistor R5, a transistor Q3 and a key SW1, one end of the key and the emitter of the transistor Q3 and one end of the resistor R5 are grounded, the other end of the resistor R5 is connected to one end of the resistor R9 and the base of the transistor Q3, the collector of the transistor Q3 is connected to the other end of the key SW1, and the other end of the resistor R9 is connected to another key pin of the single-chip microcomputer circuit 201. The second switch is a switch controlled by the key SW1. The key SW1 can be controlled to send a trigger signal to the IO (input output) pin of the single-chip microcomputer circuit 201.

[0036] It can be seen from Figure 3 that the single-chip microcomputer circuit 201 mainly comprises a single-chip microcomputer U5 chip, and a plurality of function pins of the single-chip microcomputer U5 chip are connected to corresponding circuit modules to achieve effective control.

[0037] According to Figure 3 and Figure 4 , a plurality of drive circuits 600 are further connected to the single-chip microcomputer circuit 201, the drive circuit 600 is connected to a flushing accessory through an interface, the flushing accessory is a pulse valve 500, the drive circuit 600 comprises a drive chip, and the drive chip is a TPM8837. The interface is JP2. This circuit can be expanded, and two drive chips can be used to control two pulse valves 500. The drive chips U1 and U3 are connected in the same way.

[0038] In some specific examples, the flushing fittings have two options: a, pulse solenoid valve, pulse battery valve is a bistable solenoid valve, as long as a pulse as a trigger signal, the valve can be realized and off, very power saving; b, small pressure water tank, using water storage tank to store municipal pressure water pressure, using air pump to trigger the valve, the actual air pump power consumption is very small to open the valve to flush. Selecting these two flushing ways is to realize the low power consumption of the whole product.

[0039] In the above circuit, the mechanical key SW1 (or kick) is used. Before the circuit function is started, it is in a power-off state. After the mechanical key SW1 or kick in the circuit is pressed, the single-chip microcomputer is powered on. After the single-chip microcomputer circuit 201 is powered on, the first switch module 301 is opened, so that normal power supply is started. The battery provides 3.3V stable voltage to the single-chip microcomputer through the voltage stabilizing circuit 102.

[0040] After the single-chip microcomputer gets stable power, the battery voltage monitoring module 400 (ADC circuit) is used to sample the battery voltage, to ensure that the battery voltage is within the normal range. The single-chip microcomputer starts the flushing function, and continuously collects the power supply voltage during flushing. Once the voltage is lower than the set value, the valve is closed immediately, and an alarm is issued. Ensure that the valve can be closed after each opening.

[0041] The pulse flushing process is the same as the principle of motor forward and reverse rotation. When the pulse is positive, the pulse valve 500 is opened. When the pulse is reversed, the pulse valve 500 is closed. The whole process is provided by the single-chip microcomputer, and the pulse valve 500 is driven by the driving circuit 600.

[0042] The design scheme adopts a key (kick, off seat) to realize only one cycle flushing, and no longer receives commands during the process. Only after the flushing cycle is over, the command channel is opened. After flushing, the single-chip microcomputer issues a command to close the battery power supply. At this time, the whole system (except the seat induction) is in a power-off state.

[0043] During the flushing process, the battery voltage is monitored in real time. If it is detected that the voltage is lower than the set value (i.e. low voltage protection threshold), the system starts the low voltage output protection action.

[0044] For the realization of ultra-low power consumption:

[0045] The off circuit, such as Figure 2 The circuit uses a transistor as a switching element. When not working, the transistor is off (off state), and the small leakage can be ignored.

[0046] The battery voltage monitoring module 400, the circuit is accurate detection is the battery and ground voltage so there is no connection with any switch, in order to save low power consumption, the detection circuit uses the mega ohm level resistance (resistance R2 and resistance R6) for sampling, leakage current is about 2uA.

[0047] The pulse valve 500 (and air pump) opening time is set to 50ms, which can ensure sufficient time to open the flushing, and also has the effect of low power consumption.

[0048] The drive circuit 600 has a working current of about 500uA in normal working state, and the two drive chips have a working current of about 1mA. In order to reduce power consumption, the drive chip can be set to be in working state only when the pulse is given, and in sleep state at other times, so that the working current can be reduced to 1mA.

[0049] After testing, the total leakage current of the circuit in standby state (not connected to the seat) is 3-5uA, and the standby current is about (not more than) 15uA after connecting the (low power consumption) seat sensor. The total current of the circuit is about 6.5mA (single working of the drive circuit 600) when it works. With a 500mA.h battery, assuming that the flushing frequency of a toilet is 30 times a day, the toilet can be used for more than 250 days after replacing the battery or charging the battery. After connecting the seat sensor, the toilet can also be replaced with a battery every 225 days, which is a period of time that most users can basically accept.

[0050] A large electrolytic capacitor, such as capacitor C6, can be provided on the pulse valve 500, which is used to prevent the product from being suddenly disconnected from the power supply (battery) during work. The purpose is to protect: even if the battery is disconnected, or the lithium battery boost circuit suddenly fails, the electrolytic capacitor has enough power to ensure that the pulse valve 500 can be closed. After verification, when the power input voltage is suddenly disconnected at 5.1V or the lithium battery fails, the minimum capacitance of the large electrolytic capacitor is 1200uF, and considering the 20% up and down deviation of the capacitor, the capacitance value is generally set to 1500uF or more.

[0051] When the battery voltage is 5.2V, the H-bridge is in the process of driving the pulse valve 500 to open, and the internal resistance of the pulse valve 500 is 25Ω. Since the pulse valve 500 coil is inductance, the current lags behind the voltage for a period of time at the moment of opening, and the voltage detected by the ADC at this time is normal (i.e. the valve can be opened). At this time, the output voltage meets the minimum opening voltage (4.5v) of the pulse valve 500. As the coil magnetic flux decreases, the current resistance decreases, and the internal current of the coil gradually increases to the maximum value. At this time, the battery internal resistance (including H-bridge internal resistance) is divided in the circuit, resulting in a decrease in the voltage divided by the pulse valve 500. This phenomenon is called voltage drop when the valve is opened.

[0052] After testing various brands, various materials, various models of dry batteries, DC power, lithium batteries under various voltages, the internal resistance of the battery is different when the discharge capacity of different brands of batteries is different, such as: Nanfu alkaline battery, the internal resistance is only 1Ω when the battery is full, and the internal resistance is about 2-3Ω when the battery is discharged, the internal resistance of double deer carbon battery is more than 5Ω when it is discharged. When the pulse valve 500 is given pulse, the circuit is connected, and the total resistance in the circuit is R_pulse+R_internal resistance at this time. After the current voltage, voltage under load, current test, and voltage drop calculation, the highest voltage drop reaches nearly 1V, and the measured voltage drop is close to the calculated value.

[0053] If the current battery voltage is 5.2V, when the pulse valve 500 is opened, assuming that the internal resistance of the pulse valve 500 is 25Ω, when the battery internal resistance is 2Ω, the voltage across the pulse valve 500 is 4.8V at this time, the pulse valve 500 can work normally; When the battery internal resistance is 5Ω, the voltage across the pulse valve 500 is 4.3V (lower than the rated voltage of the pulse valve 500), at this time the pulse valve 500 may not work, when the pulse valve 500 normally opens and cannot normally close, the water valve at the user end will not be effectively closed, at this time if you want to ensure product quality, you must set the minimum protection voltage of the battery to 5.5V or more, but this will cause a problem, which is not friendly to the use of small internal resistance batteries. The battery with small internal resistance cannot be completely discharged and is protected by voltage.

[0054] Therefore, based on the above analysis, the setting of the lower limit of the minimum protection voltage of the battery is very important, and the battery protection voltage should be set to the lower limit protection voltage of 5.2V when the pulse valve 500 is not opened, or the monitoring voltage is 4.7V when the pulse valve 500 is opened. One of the two voltage values proves that the battery has been depleted, and the valve should act.

[0055] The power consumption is analyzed as follows:

[0056] Single flush power consumption,

[0057] 1.1 Single flush total power consumption;

[0058] Q_total = Q_pulse + Q_work + Q_leak (Formula 1);

[0059] Q_total: single flush total power consumption.

[0060] Q_pulse: single flush pulse valve 500 total power consumption, equal to the total power consumption of 6 pulses.

[0061] Q_work: total power consumption of the circuit board in a single flush cycle, i.e. 18s power consumption.

[0062] Q_leak: leakage current during flushing, which can be ignored.

[0063] 1.2 Water consumption of single pulse valve 500:

[0064] Q_pulse = V_IN ÷ R_pulse × T_pulse × 6 (Formula 2);

[0065] V_IN: battery input voltage, average value of 6V (between 5.2V and 6.7V).

[0066] R_pulse: internal resistance of pulse valve 500, 25Ω.

[0067] T_pulse: single pulse time, 50ms.

[0068] 1.3 Total power consumption time of circuit board in single flushing cycle:

[0069] Q_work = I_work × T_work (Formula 3);

[0070] I_work: power consumption current during normal operation, measured as 8.4mA.

[0071] T_work: flushing cycle: 5.5s + 5.5s + 7s = 18s.

[0072] Through the above three formulas, the single flushing power consumption can be obtained as: Q_total = 72mA.s + 151.2mA.s = 223.2mA.s.

[0073] The above examples are only illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Any person skilled in the art can modify or change the above examples without departing from the spirit and scope of the present invention. Therefore, any equivalent changes made in terms of structure, shape, principle, etc. of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An ultra-low power intelligent toilet controller, comprising a power supply module (100), a main control module, a switching circuit (300), a battery voltage monitoring module (400), a flushing accessory, characterized in that, The power supply module (100) includes a battery power supply circuit (101), a voltage stabilizing circuit (102), the battery power supply circuit (101) includes 4 AAA, AA dry batteries or lithium batteries for power supply when 4.5V-6V is required, 9V square dry batteries are used for power supply when 6V-9V is required, and the voltage stabilizing circuit (102) uses a low dropout linear voltage regulator to convert a 4.5V-10V input power supply into a stable power supply available for a single-chip microcomputer, The main control module includes a single-chip microcomputer circuit (201), and the switch circuit (300) includes a key or a kick mechanical switch cooperating with a switch tube to realize circuit switch control. The switch circuit (300) is connected to the main control module for inputting a control signal; the battery voltage monitoring module (400) is connected to the main control module for inputting an electric quantity signal, and the flushing accessory is connected to the main control module for flushing control.

2. The ultra-low power intelligent toilet controller according to claim 1, wherein, The battery voltage monitoring module (400) includes a capacitor C1, a resistor R2, and a resistor R6, one end of the capacitor C1 is used for connecting an electric quantity detection point and one end of the resistor R2, the other end of the capacitor C1 is grounded, the other end of the resistor R2 is connected to one end of the resistor R6 and an adopting pin of the single-chip microcomputer circuit (201), and the other end of the resistor R6 is grounded.

3. The ultra-low power intelligent toilet controller according to claim 1, wherein, The switch circuit (300) includes a first switch module (301) and / or a second switch module (302), the first switch module (301) includes a transistor Q1, a resistor R4, a resistor R1, a resistor R7, a capacitor C5, a diode D1, and a transistor Q2, a second voltage source is connected to one end of the capacitor C5 and a collector of the transistor Q1, an emitter of the transistor Q1 is connected to one end of the resistor R4 and a third voltage source, the other end of the resistor R4 is connected to one end of the resistor R1 and a base of the transistor Q1, the other end of the resistor R1 is connected to an anode of the diode D1 and a collector of the transistor Q2, a cathode of the diode D1 is used for connecting a pin of the single-chip microcomputer circuit (201), an emitter of the transistor Q2 and the other end of the capacitor C5 are grounded, and a base of the transistor Q2 is connected to a key pin of the single-chip microcomputer circuit (201) through the resistor R7; The second switch module (302) includes a resistor R9, a resistor R5, a transistor Q3, and a key SW1, one end of the key and an emitter of the transistor Q3 and one end of the resistor R5 are grounded, the other end of the resistor R5 is connected to one end of the resistor R9 and a base of the transistor Q3, a collector of the transistor Q3 is connected to the other end of the key SW1, and the other end of the resistor R9 is connected to another key pin of the single-chip microcomputer circuit (201).

4. The ultra-low power intelligent toilet controller according to claim 1, wherein, A plurality of drive circuits (600) are further connected to the single-chip microcomputer circuit (201), the drive circuit (600) is connected to the flushing accessory through an interface, the flushing accessory is a pulse valve (500), and the drive circuit (600) includes a drive chip, and the drive chip is a TPM8837 type.

5. The ultra-low power intelligent toilet controller according to claim 1, wherein, The power supply voltage source of the single-chip microcomputer circuit (201) is 3.3V.

6. The ultra-low power intelligent toilet controller according to claim 4, wherein, The power supply voltage source of the flushing accessory is 6V.

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