A power supply system and method for a smart toilet and a smart toilet

Abstract

This invention discloses a power supply system and method for a smart toilet, and a smart toilet itself. The power supply system includes a main control board for the smart toilet, multiple power interfaces, and a power switching module. Each power interface is connected to a different backup power source, and each backup power source is connected to the main control board through the power switching module. In the event of a power outage, the power switching module switches to supply power to the main control board from one of the backup power sources. This invention solves the problem of existing technologies that rely on only one backup power source, ensuring that the smart toilet can still function normally with at least some of its features even during a power outage. Furthermore, this invention allows connection to multiple backup power sources, enabling users to choose according to their personal preferences and improving the user experience.

Description

Technical Field

[0001] This invention relates to the field of toilet technology, and in particular to a smart toilet power supply system and method, and a smart toilet. Background Technology

[0002] Currently, smart toilets are becoming increasingly feature-rich, offering not only automatic flushing but also body washing functions, heated seats, and seat sensors, making them increasingly popular. However, all these functions require electricity to operate properly; even the basic flushing function cannot function without power. Therefore, while convenient, smart toilets also present some inconveniences for users during power outages. To address this issue, some existing smart toilets are designed to use built-in or external backup power supplies during power outages. However, currently, existing smart toilets typically can only connect to one designated backup power source during power outages, and cannot connect to multiple backup power sources. This results in the following drawback: if the user has not purchased the designated backup power source, or if the designated backup power source has insufficient power, the smart toilet will not function properly during a power outage. Summary of the Invention

[0003] This invention addresses the technical problems existing in the prior art by providing a smart toilet power supply system and method, as well as a smart toilet, which can connect to multiple backup power sources to ensure that the smart toilet can at least use some of its functions normally when the mains power fails.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a smart toilet power supply system, including a main control board of the smart toilet, and also including multiple power interfaces and a power switching module. Each power interface is connected to a different backup power supply, and each backup power supply is connected to the main control board through the power switching module, so that in the event of a mains power failure, the power switching module switches to one of the backup power supplies to power the main control board.

[0005] Furthermore, when the main control board detects that the mains power is connected, or when the main control board detects that the smart toilet has finished working or has been interrupted, the main control board disconnects the backup power supply; in the event of a mains power failure, the main control board switches to a low-power mode, so that the smart toilet only performs basic functions, including body part cleaning function, flushing function, seat sensing function, and toilet button function.

[0006] Furthermore, there are two types of backup power supplies: a first backup power supply and a second backup power supply. When both the first and second backup power supplies are connected, the power switching module controls the second backup power supply to prioritize powering the main control board.

[0007] Furthermore, the first backup power source is a power bank or a backup battery with an output voltage lower than that required by the main control board. The output of the first backup power source is also connected to the main control board in sequence through a power receiving circuit and a boost circuit. The second backup power source is a lithium battery, whose output voltage is required by the main control board. Furthermore, the output of the second backup power source is also unidirectionally output to the main control board through a diode.

[0008] Furthermore, the power switching module includes a switching switch, a first switching circuit, a second switching circuit, and a third switching circuit. The first backup power supply is connected to the main control board in sequence through the first switching circuit and the third switching circuit. The second backup power supply is connected to the main control board through the second switching circuit and is also connected to the third switching circuit so that the third switching circuit is disconnected when the second backup power supply is connected. The switching switch connects the first switching circuit and the second switching circuit so that the first switching circuit and the second switching circuit are turned on or off when the switching switch is operated.

[0009] Furthermore, when the switch is operated, the first switch circuit and the second switch circuit are activated. After the main control board is awakened, it generates a control signal to replace the switch, so that the first switch circuit and the second switch circuit remain open. When the main control board detects that the mains power is connected, or when the main control board detects that the smart toilet has finished working or has been interrupted, the main control board stops outputting control signals.

[0010] Furthermore, the first switching circuit and the second switching circuit respectively include switching transistors Q1, Q2, and Q3. The input terminal of switching transistor Q1 is connected to the positive terminal of the first backup power supply or the positive terminal of the second backup power supply. The control terminal of switching transistor Q1 is grounded through a switching switch. The output terminal of switching transistor Q2 is connected to the control terminal of switching transistor Q2 and the output terminal of the control signal. The input terminal of switching transistor Q2 is grounded. The output terminal of switching transistor Q2 is connected to the control terminal of switching transistor Q3. The input terminal of switching transistor Q3 is connected to the positive terminal of the first backup power supply or the positive terminal of the second backup power supply. The output terminal of switching transistor Q3 constitutes the output terminal of the first switching circuit or the second switching circuit.

[0011] Furthermore, the first and second switching circuits also include resistors R1, R2, R3, R4, R5, R6, R7, and R8, and diodes D1 and D2, respectively. Resistor R1 is connected between the positive terminal of the first or second backup power supply and the control terminal of the switching transistor Q1. Resistor R2 is connected between the control terminal of the switching transistor Q1 and the switching switch. Diodes D1, R3, and R6 are connected sequentially between the output terminal of the switching transistor Q1 and the control terminal of the switching transistor Q2. The connection point of resistors R3 and R6 is also connected to the output terminal of the control signal via resistor R4 and diode D2. One end of resistor R5 is connected to the connection point of resistors R3 and R6, and the other end of resistor R5 is connected to the input terminal of the switching transistor Q2. Resistor R7 is connected between the output terminal of the switching transistor Q2 and the control terminal of the switching transistor Q3. One end of resistor R8 is connected to the positive terminal of the first or second backup power supply, and the other end of resistor R8 is connected to the control terminal of the switching transistor Q3.

[0012] Switches Q1 and Q3 are P-channel MOSFETs, and switch Q2 is an N-channel MOSFET. The input terminals of switches Q1, Q2, and Q3 are the sources, the control terminals of switches Q1, Q2, and Q3 are the gates, and the output terminals of switches Q1, Q2, and Q3 are the drains.

[0013] Furthermore, the third switching circuit includes a switching transistor Q4. The input terminal of the switching transistor Q4 is connected to the output terminal of the first switching circuit, the control terminal of the switching transistor Q4 is connected to the output terminal of the second switching circuit, and the output terminal of the switching transistor Q4 constitutes the output terminal of the third switching circuit and is connected to the power input terminal of the main control board. The switching transistor Q4 is a P-channel field-effect transistor, with the input terminal of the switching transistor Q4 being the source, the control terminal of the switching transistor Q4 being the gate, and the output terminal of the switching transistor Q4 being the drain.

[0014] Furthermore, the first backup power source is a power bank, and a power receiving circuit and a boost circuit are connected sequentially between the third switching circuit and the main control board; the second backup power source is a lithium battery; and a diode is connected between the second switching circuit and the main control board.

[0015] The present invention also provides a power supply method for a smart toilet, wherein when the mains power is on, the mains power supplies the main control board of the smart toilet, and when the mains power is off, one of a variety of designated backup power supplies supplies the main control board.

[0016] Furthermore, when the mains power is on, or when the smart toilet finishes or is interrupted, the main control board disconnects the backup power supply; in the event of a mains power failure, the main control board switches to a low-power mode, so that the smart toilet only performs basic functions, including human body washing function, flushing function, seat sensing function, and toilet button function.

[0017] There are two types of backup power supplies: a first backup power supply and a second backup power supply. When both the first backup power supply and the second backup power supply are connected, the second backup power supply will give priority to powering the main control board.

[0018] The first backup power source is a power bank or a backup battery whose output power is lower than that required by the main control board. The output of the first backup power source is also connected to the main control board in sequence through a power receiving circuit and a boost circuit. The second backup power source is a lithium battery, whose output voltage is the voltage required by the main control board.

[0019] The present invention also provides a smart toilet, including the smart toilet power supply system of the present invention as described above.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. Because this invention includes multiple power interfaces and a power switching module, each power interface connects to a different backup power source, and each backup power source connects to the main control board via the power switching module. In the event of a mains power outage, the power switching module switches to powering the main control board with one of the backup power sources. Therefore, this invention solves the problem of existing technologies that rely on only one backup power source, ensuring that the smart toilet can still function normally with at least some of its features during a mains power outage. Furthermore, this invention can connect to multiple backup power sources, allowing users to choose according to their personal preferences, thereby improving the user experience.

[0022] 2. When the main control board detects that the mains power is on, or when it detects that the smart toilet has finished working or its operation has been interrupted, the main control board disconnects the backup power supply. This reduces additional standby power consumption when the backup power supply is connected for an extended period, thereby increasing the effective usage time of the backup power supply. In the event of a mains power outage, the main control board switches to a low-power mode, allowing the smart toilet to perform only basic functions, including body part washing, flushing, seat sensing, and toilet button functions. This not only fulfills the basic functions of the smart toilet but also reduces additional power consumption and increases the effective usage time of the backup power supply.

[0023] 3. The power switching module includes a switching switch, a first switching circuit, a second switching circuit, and a third switching circuit. It features a simple circuit structure, convenient operation, and the ability to automatically prioritize the second backup power supply.

[0024] 4. The first backup power source is a power bank or other backup battery, and the second backup power source is a lithium battery, so that the present invention can use a power bank (or other backup battery) and a lithium battery to power the smart toilet in the event of a mains power outage.

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the intelligent toilet power supply system and method and the intelligent toilet of the present invention are not limited to the embodiments. Attached Figure Description

[0026] Figure 1 This is the principle framework of the present invention. Figure 1 ;

[0027] Figure 2 This is the principle framework of the present invention. Figure 2 ;

[0028] Figure 3 This is a schematic diagram of the circuit structure of the first switching circuit / second switching circuit of the present invention;

[0029] In the picture:

[0030] 10. Power bank; 20. Lithium battery; 30. Power switching module; 31. First switch circuit; 32. Second switch circuit; 33. Third switch circuit; 34. Push button switch; 35. Power receiving circuit; 36. Boost circuit; 37. Diode; 40. Main control board; 50. Flushing function component; 60. Cleaning function component; 70. Toilet button component; 80. Mains power. Detailed Implementation

[0031] In this invention, the terms "first," "second," and "third," etc., are used only to distinguish similar objects, not to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this invention, unless otherwise stated, "multiple" refers to two or more, and similarly, "various kinds" refers to two or more types.

[0032] Please see Figures 1-3 As shown, the present invention provides a power supply system for a smart toilet, including a main control board 40, multiple power interfaces, and a power switching module 30. Each power interface is connected to a different backup power source, and each backup power source is connected to the main control board 40 via the power switching module 30. In the event of a mains power outage, the power switching module 30 switches to one of the backup power sources to power the main control board 40. The main control board 40 connects to the flushing function components, cleaning function components, toilet button components, and other functional components of the smart toilet, providing power and coordinating their control. Therefore, the present invention can connect to multiple backup power sources, ensuring that the smart toilet can still function normally with at least some of its functions even during a power outage.

[0033] In this embodiment, when the main control board 40 detects that the mains power 80 is connected, or when the main control board 40 detects that the smart toilet has finished working or has been interrupted, the main control board 40 disconnects the backup power supply; when the mains power 80 is out of power, the main control board 40 switches to a low-power mode, so that the smart toilet only performs basic functions, including body part cleaning function, flushing function, seat sensing function, and toilet button function, but not limited to these.

[0034] In this embodiment, the present invention is illustrated by having two power interfaces and two backup power supplies. The two backup power supplies are a first backup power supply and a second backup power supply. One power interface is connected to the first backup power supply and the other power interface is connected to the second backup power supply. When both the first backup power supply and the second backup power supply are connected, the power switching module 30 controls the second backup power supply to prioritize powering the main control board 40.

[0035] The output voltages and currents of the first backup power supply and the second backup power supply are different, and the output voltage of the first backup power supply is less than the voltage required for the main control board 40 to operate, while the output voltage of the second backup power supply is the voltage required for the main control board 40.

[0036] In this embodiment, the first backup power source is a power bank 10, and the second backup power source is a lithium battery 20, but it is not limited to these.

[0037] In other embodiments, the first backup power source is another backup battery whose output voltage is lower than the voltage required by the main control board. The output of the first backup power source (i.e., power bank 10) is also connected to the main control board 40 in sequence through the power receiving circuit 35 and the boost circuit 36; the output of the second backup power source (i.e., lithium battery 20) is also unidirectionally output to the main control board 40 through the diode 37.

[0038] like Figure 2 As shown, the power switching module 30 includes a switching switch, a first switching circuit 31, a second switching circuit 32, and a third switching circuit 33. The first backup power supply (i.e., the power bank 10) is connected to the main control board 40 sequentially through the first switching circuit 31 and the third switching circuit 33. The second backup power supply (i.e., the lithium battery 20) is connected to the main control board 40 through the second switching circuit 32, and the second backup power supply is connected to the third switching circuit 33 so that the third switching circuit 33 is disconnected when the second backup power supply is connected. The switching switch is connected to the first switching circuit 31 and the second switching circuit 32 so that the first switching circuit 31 and the second switching circuit 32 are turned on or off when the switching switch is operated.

[0039] As a preferred method, when the switch is operated, the first switch circuit 31 and the second switch circuit 32 are activated. After the main control board 40 is awakened, it generates a control signal to replace the switch, so that the first switch circuit 31 and the second switch circuit 32 are continuously activated. When the main control board 40 detects that the mains power 80 is connected, or when the main control board 40 detects that the smart toilet has finished working or has been interrupted, the main control board 40 stops outputting control signals.

[0040] The aforementioned switch is specifically a push-button switch 34, but is not limited to this. Since the output of the first backup power source (i.e., power bank 10) is also connected to the main control board 40 sequentially through the power receiving circuit 35 and the boost circuit 36, the power receiving circuit 35 and the boost circuit 36 ​​are also sequentially connected between the third switch circuit 33 and the main control board 40. Since the output of the second backup power source (i.e., lithium battery 20) is also unidirectionally output to the main control board 40 through the diode 37, the diode 37 is also connected between the second switch circuit 32 and the main control board 40.

[0041] Therefore, when the mains power 80 is on, the main control board 40 has no control signal output, causing the first switch circuit 31 and the second switch circuit 32 to disconnect, and the power bank 10 and lithium battery 20 have no output current. When the mains power 80 is off, pressing and holding the button switch 34 can briefly activate the first switch circuit 31 and the second switch circuit 32, controlling the power supply of the power bank 10 and lithium battery 20. At this time, if only the power bank 10 is connected, the third switch circuit 33 will not have a high-level signal from the lithium battery 20 and will automatically turn on. After passing through the power receiving circuit 35, the power bank 10 outputs a fixed 9V voltage, and after passing through the boost circuit 36, it outputs a 12V voltage to the main control board 40. When the lithium battery 20 is connected, the lithium battery 20 voltage passes through the second switch circuit 32 and outputs a high level to the third switch circuit 33, causing the third switch circuit 33 to disconnect, thereby disconnecting the power supply of the power bank 10. Then, the lithium battery 20 power supply outputs a 12V voltage to the main control board 40 through the diode 37. After the main control board 40 is woken up, it uses control signals to take over from the button switch 34 to continuously control the first switch circuit 31 and the second switch circuit 32 to be open. Therefore, the power supply sequence for the smart toilet is: AC mains power 80 > lithium battery 20 > power bank 10.

[0042] When the user finishes using the toilet, leaves midway, or when the main control board 40 detects that the mains power 80 is connected, the main control board 40 actively shuts off the control signal output, the first switch circuit 31 and the second switch circuit 32 are closed, disconnecting the power supply to the power bank 10 and the lithium battery 20. At this time, the power bank 10 detects no load connection and automatically shuts off its power output, entering standby mode; the lithium battery 20 has no output circuit because the second switch circuit 32 is off and the diode 37 is in a reverse cutoff state. Therefore, in this scenario, each backup power supply only experiences internal self-discharge standby loss.

[0043] Please see Figure 3 As shown, the first switching circuit 31 and the second switching circuit 32 respectively include switching transistors Q1, Q2, and Q3. The input terminal of switching transistor Q1 is connected to the positive terminal of the first backup power supply (i.e., power bank 10) or the positive terminal of the second backup power supply (i.e., lithium battery 20). The control terminal of switching transistor Q1 is grounded through a switch (i.e., push-button switch 34). The output terminal of switching transistor Q2 is connected to the control terminal of switching transistor Q2 and the output terminal of the control signal. The input terminal of switching transistor Q2 is grounded. The output terminal of switching transistor Q2 is connected to the control terminal of switching transistor Q3. The input terminal of switching transistor Q3 is connected to the positive terminal of the first backup power supply (i.e., power bank 10) or the positive terminal of the second backup power supply (i.e., lithium battery 20). The output terminal of switching transistor Q3 constitutes the output terminal of the first switching circuit 31 or the second switching circuit 32.

[0044] Furthermore, the first switching circuit 31 and the second switching circuit 32 also include resistors R1, R2, R3, R4, R5, R6, R7, and R8, and diodes D1 and D2, respectively. Resistor R1 is connected between the positive terminal of the first backup power supply (i.e., power bank 10) or the second backup power supply (i.e., lithium battery 20) and the control terminal of the switching transistor Q1. Resistor R2 is connected between the control terminal of the switching transistor Q1 and the switching switch. Diode D1, resistor R3, and resistor R6 are connected sequentially to the output terminal of the switching transistor Q1 and the switching switch. Between the control terminals of transistor Q2 and the connection points of resistors R3 and R6, the output terminals of the control signal are connected in sequence through resistor R4 and diode D2. One end of resistor R5 is connected to the connection point of resistors R3 and R6, and the other end of resistor R5 is connected to the input terminal of transistor Q2. Resistor R7 is connected between the output terminal of transistor Q2 and the control terminal of transistor Q3. One end of resistor R8 is connected to the positive terminal of the first backup power supply (i.e., power bank 10) or the second backup power supply (i.e., lithium battery 20), and the other end of resistor R8 is connected to the control terminal of transistor Q3.

[0045] The aforementioned switches Q1 and Q3 are P-channel MOSFETs, and switch Q2 is an N-channel MOSFET. The input terminals of switches Q1, Q2, and Q3 are the sources, the control terminals are the gates, and the output terminals are the drains. In other embodiments, suitable transistors may be used instead of switches Q1, Q2, and Q3.

[0046] In this embodiment, the third switching circuit 33 includes a switching transistor Q4 (not shown in the figure). The input terminal of the switching transistor Q4 is connected to the output terminal of the first switching circuit 31, and the control terminal of the switching transistor Q4 is connected to the output terminal of the second switching circuit 32. The output terminal of the switching transistor Q4 constitutes the output terminal of the third switching circuit 33 and is connected to the power input terminal of the main control board 40. The switching transistor Q4 is specifically a P-channel field-effect transistor, but is not limited to this. Therefore, the input terminal of the switching transistor Q4 is the source, the control terminal is the gate, and the output terminal is the drain.

[0047] In a power outage scenario, after connecting the power bank 10 and the lithium battery 20, the input terminals of the switching transistors Q1 and Q3 are pulled up to a high level through resistors R1 and R8 respectively, and are in an off state. The input terminal of the switching transistor Q2 is pulled down to a low level through resistor R2, and is in an off state.

[0048] When only power bank 10 is connected, the user presses button switch 34. The control terminal of switch transistor Q1 in the first switching circuit 31 is grounded, and switch transistor Q1 conducts. Power bank 10 connects to the control terminal of switch transistor Q2 via switch transistor Q1 and diode D1, turning on switch transistor Q2. This causes the control terminal of switch transistor Q3 to connect to ground, turning on switch transistor Q3. After subsequent voltage processing, power bank 10 supplies power to the main control board 40. After the main control board 40 is activated, it outputs a high-level control signal, which, through diode D2, keeps switch transistor Q2 continuously conducting. At this time, the user can release button switch 34, turning off switch transistor Q1 in the first switching circuit 31. Switch transistors Q2 and Q3 remain conducting, ensuring that power bank 10 continuously supplies power to the main control board 40.

[0049] When only lithium battery 20 is connected, the user presses button switch 34. The control terminal of switch Q1 in the second switching circuit 32 is grounded, and switch Q1 conducts. Lithium battery 20 is connected to the control terminal of switch Q2 through switch Q1 and diode D1, and switch Q2 conducts. This causes the control terminal of switch Q3 to be connected to ground, and switch Q3 conducts. Lithium battery 20 supplies power to main control board 40 through diode 37. After main control board 40 is woken up, the output control signal is high, which controls switch Q2 to continue conducting through diode D2. At this time, the user can release button switch 34, and switch Q1 in the second switching circuit 32 is turned off. Switches Q2 and Q3 remain conducting, allowing lithium battery 20 to continuously supply power to main control board 40.

[0050] When both the power bank 10 and the lithium battery 20 are connected, pressing the button switch 34 activates both the first switching circuit 31 and the second switching circuit 32. The lithium battery 20 provides a high-level signal to the control terminal of the switching transistor Q4, causing Q4 to turn off and disconnecting the power supply to the power bank 10. This allows the lithium battery 20 to prioritize powering the main control board 40 via diode 37. After the main control board 40 is activated, it outputs a high-level control signal, which, through diode D2, keeps the switching transistor Q2 of the second switching circuit 32 continuously conducting. At this point, the user can release the button switch 34, causing the switching transistor Q1 of the second switching circuit 32 to turn off, while switching transistors Q2 and Q3 remain on, allowing the lithium battery 20 to continuously power the main control board 40. When the lithium battery 20 is depleted, pressing the button switch 34 again switches back to the state where the power bank 10 powers the main control board 40.

[0051] When the main control board 40 program reaches a certain state, such as when the user leaves or the work timeout occurs, the main control board 40 disconnects the control signal output, the switching transistors Q2 and Q3 are turned off, and the power bank 10 or lithium battery 20 stops outputting.

[0052] The following table shows the test results of the number of times a smart toilet can be cleaned / flushed during a power outage, according to the present invention:

[0053]

[0054] Therefore, this invention can power the smart toilet using a power bank 10 and a lithium battery 20 during a power outage. Furthermore, the basic functions of the smart toilet, such as bidet, feminine wash, and flushing, can continue to be used after a mains power outage. This invention can automatically switch power supplies sequentially, disconnecting the lithium battery 20 and power bank 10 when mains power is available, and disconnecting the power bank 10 when lithium battery 20 is available. It also avoids additional standby power consumption when the backup power supply is connected for extended periods.

[0055] The present invention provides a power supply method for a smart toilet, wherein when the mains power is on, the mains power supplies the main control board of the smart toilet, and when the mains power is off, one of a variety of designated backup power supplies supplies the main control board.

[0056] Furthermore, when the mains power is on, or when the smart toilet finishes or is interrupted, the main control board disconnects the backup power supply; in the event of a mains power failure, the main control board switches to a low-power mode, so that the smart toilet only performs basic functions, including human body washing function, flushing function, seat sensing function, and toilet button function.

[0057] The aforementioned backup power supply is of two types: a first backup power supply and a second backup power supply. When both the first backup power supply and the second backup power supply are connected, the second backup power supply is given priority to power the main control board. The first backup power supply is a power bank, and the second backup power supply is a lithium battery, but it is not limited to these.

[0058] The intelligent toilet power supply method of the present invention can be implemented by the intelligent toilet power supply system of the present invention described above. Therefore, the detailed power supply method is as described above and will not be repeated here.

[0059] The present invention provides a smart toilet, comprising the smart toilet power supply system described above. The rear cover of the smart toilet has a pre-installed power interface (Type-C interface) for a power bank 10 and a power interface (DC interface) for a lithium battery 20, allowing the user to connect the power bank 10 or the lithium battery 20 to the main control board 40 of the smart toilet as a backup power source in the event of a power outage.

[0060] For details on the structure and working principle of the power supply system for smart toilets, please refer to the previous description; it will not be repeated here.

[0061] The present invention discloses a smart toilet power supply system and method, and a smart toilet. The parts not covered (such as the circuit structure of the power receiving circuit and the boost circuit) are the same as or can be implemented using existing technologies.

[0062] The above embodiments are only used to further illustrate the intelligent toilet power supply system and method and the intelligent toilet of the present invention. However, the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A power supply system for a smart toilet, comprising a main control board for the smart toilet, characterized in that: It also includes multiple power interfaces and a power switching module. Each power interface is connected to a different backup power source, and each backup power source is connected to the main control board through the power switching module. In the event of a mains power outage, the main control board can be switched to be powered by one of the backup power sources through the power switching module. There are two types of backup power supplies: a first backup power supply and a second backup power supply. When both the first backup power supply and the second backup power supply are connected, the power switching module controls the second backup power supply to prioritize powering the main control board. The power switching module includes a switching switch, a first switching circuit, a second switching circuit, and a third switching circuit. The first backup power supply is connected to the main control board in sequence through the first switching circuit and the third switching circuit. The second backup power supply is connected to the main control board through the second switching circuit and is also connected to the third switching circuit, so as to drive the third switching circuit to disconnect when the second backup power supply is connected. The switching switch is connected to the first switching circuit and the second switching circuit, so that when the switching switch is operated, the first switching circuit and the second switching circuit are turned on or off.

2. The intelligent toilet power supply system according to claim 1, characterized in that: When the main control board detects that the mains power is connected, or when the main control board detects that the smart toilet has finished working or has been interrupted, the main control board disconnects the backup power supply; in the event of a mains power failure, the main control board switches to a low-power mode, so that the smart toilet only performs basic functions, including body part cleaning function, flushing function, seat sensing function, and toilet button function.

3. The intelligent toilet power supply system according to claim 2, characterized in that: The first backup power source is a power bank or a backup battery with an output voltage lower than that required by the main control board. The output of the first backup power source is also connected to the main control board in sequence through a power receiving circuit and a boost circuit. The second backup power source is a lithium battery, and its output voltage is that required by the main control board.

4. The intelligent toilet power supply system according to claim 3, characterized in that: The output of the second backup power supply is also unidirectionally output to the main control board via a diode.

5. The intelligent toilet power supply system according to claim 1, characterized in that: When the switching switch is operated, the first switching circuit and the second switching circuit are turned on. After the main control board is woken up, it generates a control signal to take over the switching switch, so that the first switching circuit and the second switching circuit are continuously turned on. When the main control board detects that the mains power is connected, or when the main control board detects that the smart toilet has finished working or has been interrupted, the main control board stops outputting the control signal.

6. The intelligent toilet power supply system according to claim 5, characterized in that: The first switching circuit and the second switching circuit respectively include switching transistors Q1, Q2, and Q3. The input terminal of switching transistor Q1 is connected to the positive terminal of the first backup power supply or the positive terminal of the second backup power supply. The control terminal of switching transistor Q1 is grounded through the switching switch. The output terminal of switching transistor Q2 is connected to the control terminal of switching transistor Q2 and the output terminal of the control signal. The input terminal of switching transistor Q2 is grounded. The output terminal of switching transistor Q2 is connected to the control terminal of switching transistor Q3. The input terminal of switching transistor Q3 is connected to the positive terminal of the first backup power supply or the positive terminal of the second backup power supply. The output terminal of switching transistor Q3 constitutes the output terminal of the first switching circuit or the second switching circuit.

7. The intelligent toilet power supply system according to claim 6, characterized in that: The first and second switching circuits further include resistors R1, R2, R3, R4, R5, R6, R7, and R8, and diodes D1 and D2, respectively. Resistor R1 is connected between the positive terminal of the first or second backup power supply and the control terminal of the switching transistor Q1. Resistor R2 is connected between the control terminal of the switching transistor Q1 and the switching switch. Diode D1, resistors R3 and R6 are connected sequentially between the output terminal of the switching transistor Q1 and the control terminal of the switching transistor Q2. The connection point of resistors R3 and R6 is also connected to the output terminal of the control signal via resistor R4 and diode D2. One end of resistor R5 is connected to the connection point of resistors R3 and R6, and the other end of resistor R5 is connected to the input terminal of the switching transistor Q2. Resistor R7 is connected between the output terminal of the switching transistor Q2 and the control terminal of the switching transistor Q3. One end of resistor R8 is connected to the positive terminal of the first or second backup power supply, and the other end of resistor R8 is connected to the control terminal of the switching transistor Q3. The switching transistors Q1 and Q3 are P-channel field-effect transistors, and the switching transistor Q2 is an N-channel field-effect transistor. The input terminals of the switching transistors Q1, Q2, and Q3 are the sources, the control terminals of the switching transistors Q1, Q2, and Q3 are the gates, and the output terminals of the switching transistors Q1, Q2, and Q3 are the drains.

8. The intelligent toilet power supply system according to claim 1, characterized in that: The third switching circuit includes a switching transistor Q4. The input terminal of the switching transistor Q4 is connected to the output terminal of the first switching circuit, the control terminal of the switching transistor Q4 is connected to the output terminal of the second switching circuit, and the output terminal of the switching transistor Q4 constitutes the output terminal of the third switching circuit and is connected to the power input terminal of the main control board. The switching transistor Q4 is a P-channel field-effect transistor, the input terminal of the switching transistor Q4 is the source, the control terminal of the switching transistor Q4 is the gate, and the output terminal of the switching transistor Q4 is the drain.

9. A method for supplying power to a smart toilet, characterized in that: When the mains power is on, the mains power supplies the main control board of the smart toilet. When the mains power is off, the power switching module switches to one of the designated backup power supplies to power the main control board. There are two types of backup power supplies: a first backup power supply and a second backup power supply. When both the first backup power supply and the second backup power supply are connected, the power switching module controls the second backup power supply to prioritize powering the main control board. The power switching module includes a switching switch, a first switching circuit, a second switching circuit, and a third switching circuit. The first backup power supply is connected to the main control board in sequence through the first switching circuit and the third switching circuit. The second backup power supply is connected to the main control board through the second switching circuit and is also connected to the third switching circuit, so as to drive the third switching circuit to disconnect when the second backup power supply is connected. The switching switch is connected to the first switching circuit and the second switching circuit, so that when the switching switch is operated, the first switching circuit and the second switching circuit are turned on or off.

10. The power supply method for a smart toilet according to claim 9, characterized in that: When the mains power is on, or when the smart toilet finishes working or is interrupted, the main control board disconnects the backup power supply; in the event of a power outage, the main control board switches to a low-power mode, so that the smart toilet only performs basic functions, including human body washing function, flushing function, seat sensing function, and toilet button function. The first backup power source is a power bank or a backup battery whose output power is lower than the power required by the main control board. The output of the first backup power source is also connected to the main control board in sequence through a power receiving circuit and a boost circuit. The second backup power source is a lithium battery, and its output voltage is the voltage required by the main control board.

11. A smart toilet, characterized in that: Including the smart toilet power supply system as described in any one of claims 1-8.

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