Electric safety protection device applied to intelligent closestool and intelligent closestool

Abstract

The utility model relates to the field of intelligent closestools, in particular to an electricity utilization safety protection device applied to an intelligent closestool and the intelligent closestool, the intelligent closestool comprises an internal control circuit, the working voltage of the internal control circuit is not higher than the target safety voltage, and the electricity utilization safety protection device comprises a voltage reduction module; the voltage reduction module is connected with a mains supply and the internal control circuit and used for converting the voltage of the mains supply into target safety voltage and transmitting the target safety voltage to the internal control circuit so as to reduce the power utilization safety risk of the intelligent closestool.

Description

Technical Field

[0001] The utility model relates to the field of intelligent toilets, in particular to an electric safety protection device applied to an intelligent toilet and an intelligent toilet. Background Art

[0002] Intelligent toilets are one of the relatively widely used smart home appliances at present, which have intelligent functions such as cleaning, drying, and seat heating. However, in existing intelligent toilets, especially the heater control circuit inside the intelligent toilet, a 220V mains power supply is directly used. Since the application environment where intelligent toilets are located is mostly a humid environment, when using this high-voltage power supply method, when the device ages or the device is damaged (such as the seat is damaged) resulting in exposed wires, it poses a risk to the personal safety of users and may even cause personal safety accidents. Therefore, it is necessary to improve the power supply structure of intelligent toilets to reduce the electricity consumption risk of intelligent toilets. Summary of the Utility Model

[0003] An embodiment of the utility model discloses an electric safety protection device applied to an intelligent toilet and an intelligent toilet, which are used to reduce the electric safety risk of the intelligent toilet.

[0004] An embodiment of the utility model provides an electric safety protection device applied to an intelligent toilet. The intelligent toilet includes an internal control circuit, and the operating voltage of the internal control circuit is not higher than the target safety voltage. The electric safety protection device includes: a step-down module;

[0005] The step-down module is respectively connected to the mains power supply and the internal control circuit, and is used to convert the voltage of the mains power supply into the target safety voltage and transmit the target safety voltage to the internal control circuit.

[0006] Optionally, the target safety voltage includes a first target voltage and a second target voltage; the step-down module includes a first voltage conversion unit and a second voltage conversion unit;

[0007] The first voltage conversion unit is respectively connected to the mains power supply and the internal control circuit, and is used to convert the voltage of the mains power supply into the first target voltage and transmit the first target voltage to the internal control circuit;

[0008] The second voltage conversion unit is connected to the first voltage conversion unit and the internal control circuit, and is used to convert the first target voltage into the second target voltage and transmit the second target voltage to the internal control circuit.

[0009] Optionally, the second voltage conversion unit includes: a conversion chip;

[0010] The first end of the conversion chip is respectively connected to the twelfth resistor, the thirteenth resistor, the thirty-third resistor, the forty-ninth resistor, and the thirty-third capacitor; the twelfth resistor is in series with the forty-ninth resistor, the thirteenth resistor is in series with the thirty-third capacitor, and the thirty-third resistor is in parallel with the twelfth resistor and the thirteenth resistor respectively;

[0011] The forty-ninth resistor is respectively connected to the thirty-third capacitor, the thirty-fifth capacitor, and the internal control circuit; the thirty-fifth capacitor is in parallel with the thirty-seventh capacitor and then grounded; the thirty-third capacitor is connected to the internal control circuit;

[0012] The thirty-seventh capacitor is respectively connected to the third triode, the eighth end of the conversion chip, and the sixth resistor;

[0013] The sixth resistor is respectively connected to the third inductor and the seventh end of the conversion chip;

[0014] The third inductor is connected to the third end of the conversion chip;

[0015] The third triode is respectively connected to the fourth end of the conversion chip and the internal control circuit;

[0016] The second end of the conversion chip is grounded;

[0017] The fifth end of the conversion chip is respectively connected to the first capacitor, the non-polar capacitor, the electrolytic capacitor, and the first voltage conversion unit;

[0018] The first capacitor is respectively connected to the sixth end of the conversion chip and the first voltage conversion unit;

[0019] The non-polar capacitor and the electrolytic capacitor are respectively connected to the first voltage conversion unit and the ground.

[0020] Optionally, the internal control circuit includes a heater assembly;

[0021] The power input socket of the heater assembly is connected to the first voltage conversion unit, and the grounded output socket of the heater assembly is grounded.

[0022] Optionally, the heater assembly includes a seat ring heater;

[0023] One end of the line socket of the seat ring heater is respectively connected to the first voltage conversion unit and one end of the fifth diode;

[0024] The other end of the line socket of the seat ring heater is respectively connected to the other end of the fifth diode and the first end of the fifteenth triode;

[0025] The second terminal of the fifteenth triode is respectively connected to both ends of the forty-fifth resistor and the sixty-ninth resistor;

[0026] The third terminal of the fifteenth triode is connected to the forty-fifth resistor and grounded;

[0027] The forty-fifth resistor is connected to the sixty-ninth resistor.

[0028] Optionally, the heater assembly includes a drying and blowing heater;

[0029] One end of the line plug interface of the drying and blowing heater is respectively connected to the first voltage conversion unit and one end of the sixteenth diode;

[0030] The other end of the line plug interface of the drying and blowing heater is respectively connected to the other end of the sixteenth diode and the fifth to eighth terminals of the gate circuit chip;

[0031] The first to fourth terminals of the gate circuit chip are all grounded and connected to one end of the sixty-eighth resistor, and the other end of the sixty-eighth resistor is respectively connected to one end of the sixty-fifth resistor and the tenth terminal of the gate circuit chip.

[0032] Optionally, the first voltage conversion unit is arranged outside the internal control circuit, and the second voltage conversion unit is arranged inside the internal control circuit.

[0033] Optionally, the target safety voltage includes multiple sub-target safety voltages with different values, and each of the sub-target safety voltages is within a preset safety threshold voltage range; the operating voltage of the internal control circuit is not higher than the maximum value of each of the sub-target safety voltages.

[0034] The present invention also provides an intelligent toilet, including an internal control circuit and an electrical safety protection device as described in any one of the above.

[0035] Optionally, the internal control circuit includes a main control board, a sensor assembly, a heater assembly, a solenoid valve assembly, and a motor assembly;

[0036] The main control board is connected to the sensor assembly, the sensor assembly is connected to the heater assembly, and the heater assembly is connected to the solenoid valve assembly;

[0037] The main control board, the sensor assembly, the solenoid valve assembly, and the motor assembly are respectively connected to the second voltage conversion unit.

[0038] It can be seen from the above technical solutions that the embodiments of the present invention have the following advantages:

[0039] The present utility model provides an electrical safety protection device applied to an intelligent toilet. The intelligent toilet includes an internal control circuit, and the operating voltage of the internal control circuit is not higher than a target safety voltage. The electrical safety protection device includes: a step-down module; the step-down module is respectively connected to a mains power supply and the internal control circuit, and is configured to convert the voltage of the mains power supply into the target safety voltage and transmit the target safety voltage to the internal control circuit;

[0040] In the present utility model, by replacing the components using high voltage in the existing internal control circuit of the intelligent toilet with low-voltage components, the operating voltage of the internal control circuit can be made not higher than the target safety voltage, thereby improving the electrical safety of the intelligent toilet; the step-down module is connected to the mains power supply and the internal control circuit, and is used to convert the mains power supply into the target safety voltage and transmit the target safety voltage to the internal control circuit, so as to provide the target safety voltage for the internal control circuit, further reducing the electrical risk of the intelligent toilet and improving the electrical safety of the intelligent toilet. Therefore, the present utility model improves the power supply part of the existing internal control circuit of the intelligent toilet, steps down the mains power supply through the step-down module, provides the target safety voltage for the intelligent toilet, avoids the electrical risk brought by directly using the high-voltage mains power supply in the prior art, reduces the electrical safety risk of the intelligent toilet, and improves the electrical safety of the intelligent toilet. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0042] Figure 1 It is one of the structural schematic diagrams of an electrical safety protection device applied to an intelligent toilet provided in an embodiment of the present utility model;

[0043] Figure 2 It is one of the structural schematic diagrams of an electrical safety protection device applied to an intelligent toilet provided in an embodiment of the present utility model;

[0044] Figure 3 It is the structural schematic diagram of a second voltage conversion unit provided in an embodiment of the present utility model;

[0045] Figure 4 It is the structural schematic diagram of a heater assembly provided in an embodiment of the present utility model;

[0046] Figure 5This is the third structural schematic diagram of an electrical safety protection device applied to a smart toilet provided in the embodiments of the present utility model. Detailed implementation manners

[0047] A smart toilet has functions of perception, decision-making, and execution. It is a type of smart home specifically applied to the toilet scenario, and its execution functions usually include one or more of water control, heat control, and execution of mechanical actions. The perception, decision-making, and execution processes of a smart toilet can correspond to parts such as sensors, circuit control, waterway control, heating control, and mechanical control of the smart toilet device. The functions of existing smart toilets will be introduced below.

[0048] (1) Sensors

[0049] Sensors are important devices for smart devices to perceive the environment and achieve non-intrusive human-computer interaction, and are also the basis for internal electrical, water, and heat feedback control. Therefore, the sensors used can be classified into ① internal sensors and ② external sensors.

[0050] Among them, sensors include but are not limited to one or several of the following:

[0051] 1) Temperature sensor. The temperature sensor is an important sensor inside the smart toilet. Temperature sensors are required to detect the temperature in all heating-related links, such as the water temperature detection of hip washing / feminine washing water, the hot air temperature detection during hip drying, and the temperature detection of the constant temperature seat ring. For a more user-friendly smart toilet, temperature sensors are also used to detect the temperature in the outer links to adjust the water temperature, air temperature, and seat ring temperature, improving the user experience.

[0052] 2) Pressure sensor. The pressure sensor can be set at the seat ring to detect actions such as when the user sits down and stands up; it can also be used to detect the water pressure at the water tank / water valve. When the water pressure is low, a booster pump can be used to assist in flushing to prevent dirt from sticking to the toilet wall.

[0053] 3) Capacitive touch sensor. It is used to detect user actions such as standing, sitting, and leaning. By directly contacting the user's skin, it can collect detailed action posture data of the user.

[0054] 4) Distance sensor. It is used to detect user actions such as approaching and moving away. As a non-contact sensor, the distance sensor can sense user actions before the user is ready to use the toilet and is often used to implement functions such as automatic lid opening, pre-flushing, and pre-heating of the seat ring.

[0055] 5) Water flow velocity sensor. The water flow velocity during hip washing / feminine washing will affect user hygiene and experience. Therefore, some existing smart toilets choose to use a water flow velocity sensor to achieve precise water flow control.

[0056] (2) Waterway control

[0057] The water circuit of a smart toilet refers to the complete path from the tap water pipe inlet to the outlet for flushing and cleaning. The purpose of water circuit control is to achieve the flushing function and the cleaning function, which are important functions of the smart toilet. Water circuit control is usually achieved by components such as pulse solenoid valves, pressure stabilizing valves, air pumps, distribution valves, and cleaners.

[0058] 1) Pulse solenoid valve. A pulse solenoid valve is a valve that uses pulses to control opening and closing, and is used to control the direct entry of tap water into the toilet. Pulse solenoid valves can effectively prevent backflow and are commonly used in tankless toilets, mainly relying on the water pressure in the tap water pipe to provide the flushing power. In some smart toilet products on the market, a pump flushing system is used to replace the pulse solenoid valve. The pump flushing system can generate flushing power and can be used normally in buildings with low water pressure.

[0059] 2) Pressure stabilizing valve, also known as pressure reducing and stabilizing valve, adjusts the flow rate of the medium by regulating the opening of the valve, thereby achieving stable regulation of the medium pressure. The solenoid valve is used to control the inflow of water, while the pressure stabilizing valve is used to keep the water output pressure stable within a certain range.

[0060] 3) Air pump. The air pump is used to pump air into the water flow to increase the cleaning intensity and improve the cleaning effect, with the effects of boosting pressure and saving water. The air pump is not a necessary component for water circuit control and can be freely selected by the user.

[0061] 4) Distribution valve. The distribution valve has several functions. It is used to switch the water circuits for hip washing and feminine washing, switch air and water flow, and also plays a role in controlling the water flow rates for hip washing and feminine washing.

[0062] 5) Cleaner. The cleaner has outlets for hip washing and feminine washing, and the water outlet is controlled by valves such as the distribution valve. A more intelligent cleaner also has a motor and a gear set to drive the cleaner to perform mechanical reciprocating motion, thereby achieving three-dimensional flushing and mobile massage functions.

[0063] (Three) Heating control

[0064] As a smart home appliance that directly contacts the skin, a comfortable temperature will greatly improve the user experience. Therefore, almost all smart toilets have a heating function. The components with heating functions in a smart toilet usually include a heated seat ring assembly, an instant hot water component for cleaning, and a drying component.

[0065] 1) Heated seat ring assembly. The heated seat ring usually consists of a seat ring, heating wires, and a temperature sensor. The heaters are installed on the seat ring as evenly as possible to evenly heat the seat ring to a temperature close to that of the human body, so that the user will not feel uncomfortable due to the temperature difference between the seat ring and the skin when using the toilet.

[0066] 2) Instant hot water component for cleaning. The instant hot water component mainly consists of a heating tube, a temperature control switch, and a temperature sensor. Ceramic heating tubes, stainless steel heating tubes, or quartz heating tubes are often used for the heating tube. Since the cleaning water flow for hip washing and feminine washing directly contacts the human skin, it is required that the cleaning water flow can be heated instantly, avoiding the discomfort caused by cold water stimulating the user's buttocks. Some smart toilet products use a water storage tank plus a common heater to replace the instant hot water component in consideration of reducing the cost of the instant hot water component, heating and storing the cleaning water in advance and keeping it warm.

[0067] 3) Drying component. The drying component consists of a blower, a heating wire, and an air duct, which is used to dry the remaining moisture after hip washing and feminine washing. The heating wire heats the air flow generated by the blower, making the moisture evaporate faster, and the hot air will also improve the user experience. Smart toilets equipped with a cleaning function generally come with an air drying or drying component as an option.

[0068] (IV) Mechanical control

[0069] Mechanical control is powered by a motor. After being transmitted through gears and worm gears, it makes the components of the smart toilet move. This part is not essential for the smart toilet, but a smart toilet with mechanical movement functions can provide a more intelligent and user-friendly experience for users. And it has different application methods according to the product design of the manufacturing company and user needs. The functions including mechanical control include but are not limited to:

[0070] 1) Automatic opening and closing of the toilet lid. When sensing the approach of the user, the toilet lid is opened through mechanical control and closed when the user leaves.

[0071] 2) Cleaning and massage function. Adding mechanical control to the hip washing / feminine washing cleaner can provide a massage experience and a more three-dimensional cleaning effect for users during cleaning.

[0072] 3) Sitting posture adjustment function. Based on the human posture data obtained by multiple sensors, the height and angle of the toilet seat are adjusted to provide a comfortable sitting experience for users with different body shapes and postures.

[0073] (V) Circuit control

[0074] Circuit control is one of the core parts of the smart toilet, ensuring that the components and assemblies of various parts inside, such as sensors, water circuits, heating controls, and mechanical controls, can work properly, and also controlling the operation of all functions of the smart toilet. Circuit control consists of two parts. Specifically, it can include the following components:

[0075] 1) Power supply board

[0076] The power supply board is used to supply electrical energy to each component and assembly.

[0077] Existing power supply boards take the mains power (such as 220V AC) as the input, and the input filter circuit in them filters out the noise of the input current, providing high-voltage (220V) AC power to other components. It can also be used to rectify and filter the AC power and then provide DC power with a voltage between +5V and +48V to other components. If devices such as switching transistors and triodes are added to the power supply board, PWM signals can also be directly generated. It should be understood that the high voltage in this application refers to a voltage of 220V.

[0078] The types of power supplied by the power supply board can include AC power, DC power, and PWM signals. Among them, high-voltage AC power is used to supply power to the heating control part with a relatively high power, that is, to supply power to the heating seat ring assembly, drying assembly, and instant hot water cleaning assembly. In some smart toilets on the market, high-voltage AC power is also used to supply power to the main control board, solenoid valve, motor, water pump, and air pump. Low-voltage DC power is often used to supply power to components such as sensors, the main control board, waterway valves and pumps, and motors controlled mechanically.

[0079] 2) Main control board

[0080] The main control board is one of the core parts of the smart toilet. Based on the data collected by various sensors, the internal software performs operations and makes decisions, and then issues instructions to parts such as the waterway, heating control, and mechanical control to achieve functions such as flushing (collecting data from pressure sensors and infrared sensors and controlling waterway valves and air pumps), cleaning (controlling waterway valves, air pumps, distribution valves, cleaners, and drying components), automatically opening and closing the toilet lid (collecting infrared sensors and controlling the motor), and constant temperature control (collecting temperature sensors on the seat ring, water tank, and drying air duct and controlling the working power of heaters in each part).

[0081] From the above introduction of the functions of existing smart toilets, there are potential electrical safety hazards in the existing smart toilet technical solutions. For example: (1) The heater of the seat ring is powered by a high voltage (such as 220V) power supply. If the seat ring is damaged and the wire is exposed, there is a risk of electric shock; (2) The instant hot water component for cleaning water is also powered by a high voltage. If not handled properly, it will form a circuit with the human body through the cleaning water, causing a risk of electric shock; (3) Other components powered by high-voltage AC power and the power supply board connected to the mains power have safety hazards in the humid environment where the smart toilet is located. If improper handling, equipment damage, circuit aging, etc. occur, it may lead to electrical safety accidents.

[0082] Based on the above, in the existing intelligent toilet, directly using devices with a high working voltage inside and supplying power through a high-voltage access to the power board may pose potential electrical safety hazards. In order to reduce electrical safety hazards, the existing technology is to set heating modules such as the heating module for cleaning water outside the intelligent toilet to reduce the problem of electrical safety hazards caused by high-voltage access to the inside of the intelligent toilet. However, in this method, other components such as the seat heating component still use high voltage for power supply, and the high-voltage still accesses the power board, which still brings a relatively high electrical safety risk to users.

[0083] Therefore, the present utility model provides an electrical safety protection device and an intelligent toilet applied to an intelligent toilet, which are used to reduce the electrical safety risk of the intelligent toilet.

[0084] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0085] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "front", "rear", "upper", "lower", "both ends", "center", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present utility model. Relationship terms such as "first", "second", etc. are only used to distinguish one entity from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities.

[0086] Unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation", "setting" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0087] Please refer to Figures 1-4 , an electrical safety protection device applied to an intelligent toilet provided in an embodiment of the present utility model, the intelligent toilet 2 includes an internal control circuit 21, the working voltage of the internal control circuit 21 is not higher than the target safety voltage, and the electrical safety protection device includes: a step-down module 2;

[0088] The step-down module 2 is respectively connected to the mains power supply 3 and the internal control circuit 21, and is configured to convert the voltage of the mains power supply 3 into a target safe voltage and transmit the target safe voltage to the internal control circuit 21.

[0089] It should be noted that the target safe voltage refers to a voltage that will not pose a hazard to the personal safety of users. For example, the target safe voltage can be 36V or other voltages that will not pose a hazard to the personal safety of users. In a specific implementation process, first replace the devices with high working voltages in the prior art with corresponding low-voltage devices to obtain the improved internal control circuit 21, so that the working voltage of the improved internal control circuit 21 is not higher than the target safe voltage. It can be understood that the replacement refers to replacing the high-voltage or low-voltage power consumption types of the devices. For example, replace a heater that requires high voltage with a heater that uses low voltage. Specifically, when selecting a heater, it can be selected based on the target safe voltage, and a heater not higher than the target safe voltage can be selected.

[0090] Specifically, the step-down module 2 converts the voltage of the mains power supply 3 into a target safe voltage and provides the target safe voltage for the internal control circuit 21, so that the target safe voltage serves as the power source of the internal control circuit 21, thereby reducing the safety hazards brought by directly using high-voltage power supply and improving the electrical safety of the intelligent toilet.

[0091] In this embodiment, by replacing the devices using high voltage in the existing internal control circuit 21 of the intelligent toilet 2 with corresponding low-voltage devices, the working voltage of the internal control circuit 21 is not higher than the target safe voltage, improving the electrical safety of the intelligent toilet 2; the step-down module 2 is connected to the mains power supply 3 and the internal control circuit 21, and is configured to convert the high-voltage AC voltage of the mains power supply 3 into a target safe voltage and transmit the target safe voltage to the internal control circuit 21, thereby providing the target safe voltage for the internal control circuit 21 and avoiding the safety hazards brought by directly introducing the mains power into the intelligent toilet, further reducing the electrical risk of the intelligent toilet 2 and improving the electrical safety of the intelligent toilet 2. Therefore, in this embodiment, by improving the power supply part of the existing internal control circuit 21 of the intelligent toilet 2, and stepping down the mains power supply 3 through the step-down module 2 to provide the target safe voltage for the intelligent toilet 2, the electrical risk brought by directly using the high-voltage mains power supply 3 in the prior art is avoided, the electrical safety risk of the intelligent toilet 2 is reduced, and the electrical safety of the intelligent toilet 2 is improved.

[0092] In a specific embodiment, the target safe voltage includes a first target voltage and a second target voltage; the step-down module 2 includes a first voltage conversion unit 11 and a second voltage conversion unit 12;

[0093] The first voltage conversion unit 11 is respectively connected to the mains power supply 3 and the internal control circuit 21, and is used to convert the voltage of the mains power supply 3 into a first target voltage and transmit the first target voltage to the internal control circuit;

[0094] The second voltage conversion unit 12 is connected to the first voltage conversion unit 11 and the internal control circuit 21, and is used to convert the first target voltage into a second target voltage and transmit the second target voltage to the internal control circuit 21.

[0095] It should be noted that the mains power supply 3 is an alternating current of 220V. In this embodiment, the first voltage conversion unit 11 is used to convert the mains power supply 3 into a first target voltage. Among them, the first target voltage is a direct current, and the conversion includes filtering, rectifying, and bucking. It can be understood that the first voltage conversion unit 11 can use a mature rectifier product on the market to achieve filtering, rectifying, and bucking, and the specific product can be selected according to the actual situation.

[0096] It should be noted that the second target voltage is a direct current. Among them, the second target voltage includes multiple sub-target voltages with different values, and each sub-target voltage can be determined according to the working voltages of the components in the internal control circuit 21 of the smart toilet 2.

[0097] For example: The main control board 41, sensors, solenoid valves and other components in the existing internal control circuit 21 of the smart toilet 2 generally use low-voltage power supply, such as common low voltages of 24V, 12V, 5V, etc. In actual improvement, the components using low-voltage power supply can be retained, and the components using high voltage can be replaced with low-voltage components. For example, a heater with a working voltage of 36V can be selected for the heater. Based on this, each sub-target voltage can be correspondingly set to 24V, 12V, 5V, 36V, so as to provide corresponding electric energy for the components of the internal control circuit 21 of the smart toilet 2.

[0098] Therefore, in this embodiment, the second voltage conversion unit 12 can convert the first target voltage obtained by the first voltage conversion unit 11 for the first time into a second target voltage including multiple sub-target voltages, so as to meet the power supply requirements of different components of the internal control circuit 21 of the smart toilet 2, and further improve the electrical safety. Among them, the first voltage conversion unit 11 is connected to the heater assembly in the internal control circuit 21 to provide the first target voltage for the heater assembly, and the second voltage conversion unit 12 is connected to the main control board, sensor assembly, solenoid valve assembly, and motor assembly in the internal control circuit 21 to provide the second target voltage for the main control board, sensor assembly, solenoid valve assembly, and motor assembly.

[0099] In a specific embodiment, the second voltage conversion unit 12 includes: a conversion chip U8;

[0100] The first terminal VFB of the conversion chip U8 is respectively connected to the twelfth resistor R12, the thirteenth resistor R13, the thirty-third resistor R33, the forty-ninth resistor R49, and the thirty-third capacitor C33; the twelfth resistor R12 is in series with the forty-ninth resistor R49, the thirteenth resistor R13 is in series with the thirty-third capacitor C33, and the thirty-third resistor R33 is respectively in parallel with the twelfth resistor R12 and the thirteenth resistor R13;

[0101] The forty-ninth resistor R49 is respectively connected to the thirty-third capacitor C33, the thirty-fifth capacitor C35, and the internal control circuit 21; the thirty-fifth capacitor C35 is in parallel with the thirty-seventh capacitor C37 and then grounded; the thirty-third capacitor C33 is connected to the internal control circuit 21;

[0102] The thirty-seventh capacitor C37 is respectively connected to the third triode Q3, the eighth terminal CSN of the conversion chip U8, and the sixth resistor R6;

[0103] The sixth resistor R6 is respectively connected to the third inductor L3 and the seventh terminal CSP of the conversion chip U8;

[0104] The third inductor L3 is connected to the third terminal SW of the conversion chip U8;

[0105] The third triode Q3 is respectively connected to the fourth terminal PRO of the conversion chip U8 and the internal control circuit 21;

[0106] The second terminal GND of the conversion chip U8 is grounded;

[0107] The fifth terminal VIN of the conversion chip U8 is respectively connected to the first capacitor C1, the non-polar capacitor C41, the electrolytic capacitor EC1, and the first voltage conversion unit 11;

[0108] The first capacitor C1 is respectively connected to the sixth terminal BS of the conversion chip U8 and the first voltage conversion unit 11;

[0109] The non-polar capacitor C41 and the electrolytic capacitor EC1 are respectively connected to the first voltage conversion unit 11 and the ground.

[0110] It should be noted that VIN is the voltage input port of the conversion chip U8, GND is the power ground terminal of the conversion chip U8, and BS is the drive port of the conversion chip U8; VFB is the feedback voltage port of the conversion chip U8, SW is the switching element control signal port of the conversion chip U8, PRO is the overvoltage protection port of the conversion chip U8, and CSP and CSN are respectively the positive and negative current detection terminals of the conversion chip U8.

[0111] In this embodiment, the first target safety voltage is taken as an example of 36V for illustration, such as Figure 3As shown in the figure, an electrolytic capacitor EC1 and a non-polar capacitor C14 are connected between the voltage input port VIN of the conversion chip and the power ground GND, and the 36V voltage output by the first voltage conversion unit 11 is connected. The port BS is connected to the first capacitor C1, and through the first capacitor C1 to the first capacitor C1, and through the first capacitor C1 to the 36V voltage. The switching element control signal port SW is connected to the third inductor L3, and through the third inductor L3 to the sixth resistor R6; the positive current detection port CSP and the negative current detection port CSN are respectively connected to the positive and negative electrodes of the sixth resistor R6, and the negative electrode of the sixth resistor R6 outputs a 12V voltage. Specifically, a thirty-seventh capacitor C37 and a thirty-fifth capacitor C35 are connected between the negative electrode of the sixth resistor R6 and the power ground GND; a forty-ninth resistor R49 and a thirty-third capacitor C33 are connected between the voltage feedback port VFP and the negative electrode of the sixth resistor R6; a twelfth resistor R12, a thirteenth resistor R13, and a thirty-third resistor R33 are connected between the voltage feedback port VFP and the power ground GND; the positive electrode of the forty-ninth resistor R49 outputs a 12V voltage, and the positive electrode of the thirty-third capacitor C33 outputs a 12V voltage.

[0112] The negative electrode of the sixth resistor R6 is connected to the drain of the third triode Q3, and the source of the third triode outputs a 5V voltage.

[0113] It can be understood that the first target safety voltage can be other voltages not greater than 36V.

[0114] In a specific embodiment, the conversion chip is a DC-DC conversion chip.

[0115] In a specific embodiment, the conversion chip can adopt a DC-DC conversion chip with the model number BLL2740.

[0116] In a specific embodiment, the first capacitor C1 and the thirty-fifth capacitor C35 are non-polar capacitors.

[0117] In a specific embodiment, the thirty-seventh capacitor C37 is an electrolytic capacitor.

[0118] In a specific embodiment, the third triode Q3 can adopt a MOS tube.

[0119] In a specific embodiment, the resistance value of the twelfth resistor R12 can be 25 KΩ, the resistance value of the thirteenth resistor R13 can be 25 KΩ; the resistance value of the thirty-third resistor R33 can be 33 KΩ; the resistance value of the forty-ninth resistor R49 can be 100 KΩ; the capacitance value range of the thirty-third capacitor C33 can be from 100 pF to 3.3 nF; the capacitance value of the thirty-fifth capacitor C35 can be 4.7 uF; the capacitance value of the thirty-seventh capacitor C37 can be 220 uF; the resistance value of the sixth resistor R6 can be 20 mΩ; the inductance value of the third inductor L3 can be 33 μH; the capacitance value of the first capacitor C1 can be 100 nF; the capacitance value of the non-polar capacitor C41 can be 2.2 uF; the capacitance value of the electrolytic capacitor EC1 can be 47 uF.

[0120] In a specific embodiment, the internal control circuit 21 includes a heater assembly 43;

[0121] The power input jack CZ1 of the heater assembly 43 is connected to the first voltage conversion unit 12, and the ground output interface of the heater assembly 43 is grounded.

[0122] In a specific embodiment, the heater assembly 43 includes a seat heater 431;

[0123] One end of the line jack CZ2 of the seat heater 431 is respectively connected to one end of the first voltage conversion unit 11 and the fifth diode D5;

[0124] The other end of the line jack CZ2 of the seat heater 431 is respectively connected to the other end of the fifth diode D5 and the first end of the fifteenth triode D15;

[0125] The second end of the fifteenth triode D15 is respectively connected to both ends of the forty-fifth resistor R45 and the sixty-ninth resistor R69;

[0126] The third end of the fifteenth triode Q15 is connected to the forty-fifth resistor R45 and is grounded;

[0127] The forty-fifth resistor R45 is connected to the sixty-ninth resistor R69.

[0128] In a specific embodiment, the heater assembly 43 includes a drying blower heater 432;

[0129] One end of the line jack CZ3 of the drying blower heater 432 is respectively connected to one end of the first voltage conversion unit 11 and the sixteenth diode D16;

[0130] The other end of the line jack CZ3 of the drying blower heater 432 is respectively connected to the other end of the sixteenth diode D16 and the fifth to eighth ends of the gate circuit chip U10;

[0131] The first to fourth terminals of the gate circuit chip U10 are all grounded respectively and are connected to one end of the sixty-eighth resistor R68. The other end of the sixty-eighth resistor R68 is connected to one end of the sixty-fifth resistor R65 and the tenth terminal of the gate circuit chip U10 respectively.

[0132] It should be noted that in this embodiment, heating wires with a working voltage of 36V are used to construct the seat heater 431 and the drying and blowing heater 432. Among them, the seat heater 431 is obtained by replacing the heating wire in the existing heating seat assembly with the heating wire with a working voltage of 36V in this embodiment. The drying and blowing heater 423 is obtained by replacing the heating wire in the existing drying assembly with the heating wire with a working voltage of 36V in this embodiment. It can be understood that in practical applications, the 36V heating wire can be customized by existing manufacturers of heaters. For example, on the basis of the heating wire in an existing smart toilet, by increasing the cross-sectional area of the heating wire, the resistance R of the heating wire is reduced, so that the heating power U^2 / R of the heating wire can still maintain a relatively large power after U drops to the safe voltage of 36V.

[0133] As Figure 4 shown, CZ1, CZ2, and CZ3 are respectively the line plug-in interfaces for power input, the seat heater 431, and the drying and blowing heater 432. Among them, CZ1, CZ2, and CZ3 are integrated on the circuit board, and the first terminal of CZ1 is connected to the first terminals of CZ2 and CZ3 respectively through the channels welded inside the circuit board; the second terminal of CZ1 is the grounding terminal. Therefore, the grounding terminals connected by the forty-fifth ground resistor R45 and the grounding terminal connected by the sixty-eighth resistor R68 can be connected to the second terminal of CZ1.

[0134] Among them, the first terminal of CZ1 is used to plug in the first voltage conversion unit 11, that is, used to plug in a 36V power supply. Therefore, the first voltage conversion unit 11 can be connected to the first terminals of CZ2 and CZ3 respectively through CZ1. CZ2 is used to plug in the seat heater 431, and CZ3 is used to plug in the blowing heater 423. Based on this, the seat heater 431 is connected to the first voltage conversion unit 11 through the connection relationship between CZ2 and CZ1. The drying and blowing heater 432 is connected to the first voltage conversion unit 11 through the connection relationship between CZ3 and CZ1.

[0135] It should be noted that the seat ring heater 431 also includes a temperature protection switch and a heat conduction pad. Among them, the temperature protection switch is connected in series with the heating wire. The heating circuit composed of the series connection of the temperature protection switch and the heating wire is respectively plugged into the line plug interface CZ2. Both the temperature protection switch and the heating wire are wrapped in the heat conduction pad. The temperature protection switch is used to disconnect when the heating wire reaches a preset temperature threshold, so as to disconnect the power supply path of the heating wire and prevent the seat ring from overheating. In one example, the heat conduction pad can use a cotton pad or tin foil, which is used to evenly conduct the heat of the heating wire to the seat ring.

[0136] Among them, the cathode and anode of a protection diode D5 (i.e., the fifth diode) are connected between the positive and negative poles of the line plug interface CZ2 of the seat ring heater 431. And the positive pole of the line plug interface CZ2 of the seat ring heater 431 is connected to the 36V power supply. And the negative pole of the line plug interface CZ2 of the seat ring heater 431 is connected to the drain of the fifteenth triode Q15. The gate of the fifteenth triode Q15 is connected to the sixty-ninth resistor R69 and the forty-fifth resistor R45. One end of the sixty-ninth resistor R69 receives the seat ring heating signal "heat Seat". The forty-fifth resistor R45 and the fifteenth triode R15 are grounded to GND.

[0137] It should be noted that the protection diode D5 is used to prevent the reverse voltage injection of the external circuit. If the internal circuit suddenly loses power, the inductive effect of the external device will cause the voltage between CZ2 - CZ1 to rise, thus damaging the internal circuit. By setting the protection diode D5, the reverse voltage injection caused by the voltage rise between CZ2 - CZ1 can be avoided, playing a role in protecting the internal circuit. The seat ring heating signal "heat Seat" belongs to a voltage signal, which is used to turn on or off the fifteenth triode Q15 to start or stop the seat ring heater 431. When the fifteenth triode Q15 is turned on, the circuit between CZ2 and the 36V voltage is turned on. Therefore, the seat ring heater 431 is powered on and starts, that is, the heating wire is powered on and generates heat, thereby heating the seat ring. When the fifteenth triode Q15 is turned off, the circuit between CZ2 and the 36V voltage is disconnected, the seat ring heater 431 is turned off, and the heating wire loses power and stops generating heat, thereby stopping heating the seat ring. Among them, the sixty-ninth resistor acts as a protection resistor, playing a role in voltage division to avoid excessive input voltage signal and damaging the circuit. The forty-fifth resistor R45 acts as a pull-down resistor, which is used to keep the line of the seat ring heater 431 in a low voltage state when no external voltage signal input (such as the seat ring heating signal "heat Seat") is received.

[0138] It can be understood that the voltage magnitude of the seat heating signal "heat Seat" affects the voltage between the source and drain of the fifteenth triode Q15, thereby affecting the on and off states of the fifteenth triode Q15. Therefore, by setting the voltage of the "heat Seat" signal, the voltage between the source and drain of the fifteenth triode Q15 can be changed, so as to achieve the purpose of turning on or off the fifteenth triode Q15.

[0139] Among them, the positive and negative poles of the line plug interface CZ3 of the drying and blowing heater 432 are respectively connected to the cathode and anode of the protection diode D16 (i.e., the sixteenth diode). The positive pole of the line plug interface CZ3 of the drying and blowing heater 432 is connected to a 36V voltage, and the negative pole of the line plug interface CZ3 of the drying and blowing heater 432 is respectively connected to all the drains D of the gate circuit chip U10; the source S of the gate circuit chip U10 is grounded, a sixty-eighth resistor R68 is connected between the gate G of the gate circuit chip U10 and the power ground GND, one end of the sixty-eighth resistor R68 is connected to one end of the sixty-fifth resistor R65, one end of the sixty-fifth resistor R65 is connected to the gate G of the gate circuit chip U10, and the other end of the sixty-fifth resistor R65 receives the blowing heating signal "Heat Blowing".

[0140] It should be noted that the function of the sixteenth diode D16 is the same as that of the fifth diode D5, both of which are to prevent the reverse injection of the external circuit voltage. The function of the sixty-fifth resistor R65 is the same as that of the sixty-ninth resistor R69, both of which play a role in voltage division protection. The sixty-eighth resistor R68, as a pull-down resistor, is used to keep the line of the drying and blowing heater 431 in a low voltage state when no external voltage signal input (such as the blowing heating signal "Heat Blowing") is received. The gate circuit chip U10 is used to start or close the drying and blowing heater 431. The blowing heating signal "HeatBlowing" belongs to a voltage signal and is used to turn on or off the gate circuit chip U10 to start or close the drying and blowing heater 432. Among them, when the Heat Blowing signal is a high voltage signal, the source S and drain D of the gate circuit chip U10 are conducted, so that the loop between the 36V voltage and CZ3 is conducted, thereby enabling the drying and blowing heater 432 plugged into CZ3 to be powered on and started. When the Heat Blowing signal is a low voltage signal, the source S and drain D of the gate circuit chip U10 are disconnected, so that the loop between the 36V voltage and CZ3 is disconnected, thereby enabling the blowing and drying heater 432 to lose power and turn off.

[0141] In a specific embodiment, the gate circuit chip U10 can adopt CMSC012N06.

[0142] In a specific embodiment, the heat blowing signal "Heat Blowing" can be output by the main control board, that is, the main control board is connected to the sixty-fifth resistor R65. The drying blower heater 431 is started or stopped through the main control board.

[0143] For example: in the actual application process, when the intelligent toilet finishes the hip washing action, the main control board outputs the heatBlowing signal to start the drying blower heater to start the drying function.

[0144] In a specific embodiment, the seat heating signal "heat Seat" can be generated by setting a switch button and a driving power supply. For example, by setting the driving power supply in series with the switch button, when the user presses the switch button, the driving power supply is conducted with the sixty-ninth resistor R69 and the channel of the fifteenth triode Q15, so that the fifteenth triode Q15 is powered on and conducted, thereby starting the seat heater. Therefore, the user can start or stop the seat heater through the switch button.

[0145] In another specific embodiment, the seat heating signal "heat Seat" can also be provided by the main control board, that is, the main control board is connected to the sixty-ninth resistor R69, and is used to output the seat heating signal "heat Seat" to start or stop the seat heater.

[0146] For example: in actual application, the user can output a start signal or a stop signal to the main control board by pressing a button or other device. After receiving the signal input by the user, the main control board outputs the seat heating signal "heat Seat" to start or stop the seat heater.

[0147] In a specific embodiment, the fifteenth triode Q15 can be a MOS transistor.

[0148] In a specific embodiment, the first voltage conversion unit 11 is arranged outside the internal control circuit 21, and the second voltage conversion unit 12 is arranged inside the internal control circuit 21.

[0149] It should be noted that in this embodiment, the first voltage conversion unit 11 can be arranged outside the internal control circuit 21, and the second voltage conversion unit 12 can be arranged inside the internal control circuit 21, so as to isolate the high voltage from entering the inside of the intelligent toilet 2 and further improve the electrical safety of the intelligent toilet 2.

[0150] In a specific embodiment, the target safety voltage includes multiple sub-target safety voltages with different values, and each sub-target safety voltage is within a preset safety threshold voltage range; the operating voltage of the internal control circuit 21 is not higher than the maximum value of each sub-target safety voltage.

[0151] It should be noted that, as Figure 5 shown, as another implementation, the voltage reduction module 2 can adopt an AC-DC converter that can convert into multiple voltages with different values, so as to directly realize the conversion between the voltage of the mains power supply 3 and multiple specifications of voltages, further isolating the high voltage from entering the internal control circuit 21 of the intelligent toilet 2 and improving the electrical safety of the intelligent toilet 2.

[0152] As an example, the voltage reduction module 2 converts the AC voltage of the mains power supply 3 into safe DC voltages of multiple specifications such as 5V, 12V, 15V, 24V, and 36V.

[0153] The present utility model also provides an intelligent toilet, which includes an internal control circuit 21 and an electrical safety protection device as described in the above embodiments and connected to the internal control circuit 21.

[0154] In a specific embodiment, the internal control circuit 21 includes a main control board 41, a sensor assembly 42, a heater assembly 43, a solenoid valve assembly 44, and a motor assembly 45;

[0155] The main control board 41 is connected to the sensor assembly 42, the sensor assembly 42 is connected to the heater assembly 43, and the heater assembly 43 is connected to the solenoid valve assembly 44;

[0156] The main control board 41, the sensor assembly 42, the solenoid valve assembly 44, and the motor assembly 45 are respectively connected to the second voltage conversion unit 12.

[0157] It should be noted that in the existing intelligent toilets 2 on the market, devices such as the main control board 41, the sensor assembly 42, the solenoid valve assembly 44, and the motor assembly 45 generally use low voltage power supply. Commonly used ones are 24V, 12V, and 5V, all of which are safe voltages not greater than 36V. Considering that if the original low voltage power supply devices (such as the main control board 41, the sensor assembly 42, the solenoid valve assembly 44, and the motor assembly 45) are changed to 36V power supply, it will not only increase the production cost but also not improve the electrical safety. Therefore, in this embodiment, on the basis of retaining the existing low voltage power supply devices such as the main control board 41, the sensor assembly 42, the solenoid valve assembly 44, and the motor assembly 45, a control circuit for the heater using 36V safe voltage is constructed and the existing heater inside the intelligent toilet is replaced, so that the overall working voltage of the control circuit inside the intelligent toilet 2 does not exceed 36V, so as not to cause harm to the human body in case of electric leakage accidents due to equipment aging, damage, or failure, ensuring the electrical safety of the intelligent toilet 2, reducing electrical safety hazards, and at the same time, reducing the improvement cost and production cost as much as possible.

[0158] The above has introduced in detail an electrical safety protection device and a smart toilet applied to the smart toilet provided by the present utility model. For those of ordinary skill in the art, according to the idea of the embodiments of the present utility model, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. An electrical safety protection device applied to a smart toilet, the smart toilet includes an internal control circuit, and the operating voltage of the internal control circuit is not higher than the target safety voltage, characterized in that, The electrical safety protection device includes: a step-down module; The step-down module is respectively connected to the mains power supply and the internal control circuit, and is used for converting the voltage of the mains power supply into the target safety voltage and transmitting the target safety voltage to the internal control circuit; The target safety voltage includes a first target voltage and a second target voltage; the step-down module includes a first voltage conversion unit and a second voltage conversion unit; The first voltage conversion unit is respectively connected to the mains power supply and the internal control circuit, and is used for converting the voltage of the mains power supply into the first target voltage and transmitting the first target voltage to the internal control circuit; The second voltage conversion unit is connected to the first voltage conversion unit and the internal control circuit, and is used for converting the first target voltage into the second target voltage and transmitting the second target voltage to the internal control circuit; The second voltage conversion unit includes: a conversion chip; The first end of the conversion chip is respectively connected to a twelfth resistor, a thirteenth resistor, a thirty-third resistor, a forty-ninth resistor, and a thirty-third capacitor; the twelfth resistor and the forty-ninth resistor are connected in series, the thirteenth resistor and the thirty-third capacitor are connected in series, and the thirty-third resistor is respectively connected in parallel with the twelfth resistor and the thirteenth resistor; The forty-ninth resistor is respectively connected to the thirty-third capacitor, a thirty-fifth capacitor, and the internal control circuit; the thirty-fifth capacitor and a thirty-seventh capacitor are connected in parallel and then grounded; the thirty-third capacitor is connected to the internal control circuit; The thirty-seventh capacitor is respectively connected to a third triode, the eighth end of the conversion chip, and a sixth resistor; The sixth resistor is respectively connected to a third inductor and the seventh end of the conversion chip; The third inductor is connected to the third end of the conversion chip; The third triode is respectively connected to the fourth end of the conversion chip and the internal control circuit; The second end of the conversion chip is grounded; The fifth end of the conversion chip is respectively connected to a first capacitor, a non-polar capacitor, an electrolytic capacitor, and the first voltage conversion unit; The first capacitor is respectively connected to the sixth end of the conversion chip and the first voltage conversion unit; The non-polar capacitor and the electrolytic capacitor are respectively connected to the first voltage conversion unit and the ground.

2. The device according to claim 1, characterized in that, The internal control circuit includes a heater assembly; The power input jack of the heater assembly is connected to the first voltage conversion unit, and the ground output interface of the heater assembly is grounded.

3. The device according to claim 2, characterized in that, The heater assembly includes a seat ring heater; One end of the line jack of the seat ring heater is respectively connected to the first voltage conversion unit and one end of a fifth diode; The other end of the line jack of the seat ring heater is respectively connected to the other end of the fifth diode and the first end of a fifteenth triode; The second end of the fifteenth triode is respectively connected to both ends of a forty-fifth resistor and a sixty-ninth resistor; The third end of the fifteenth triode is connected to the forty-fifth resistor and is grounded; The forty-fifth resistor is connected to the sixty-ninth resistor.

4. The device according to claim 2, wherein The heater assembly includes a drying blower heater; One end of the line socket of the drying and blowing heater is respectively connected to the first voltage conversion unit and one end of the sixteenth diode; The other end of the line socket of the drying and blowing heater is respectively connected to the other end of the sixteenth diode and the fifth to eighth ends of the gate circuit chip; The first to fourth ends of the gate circuit chip are all grounded and connected to one end of the sixty-eighth resistor, and the other end of the sixty-eighth resistor is respectively connected to one end of the sixty-fifth resistor and the tenth end of the gate circuit chip.

5. The device according to claim 1, characterized in that, The first voltage conversion unit is arranged outside the internal control circuit, and the second voltage conversion unit is arranged inside the internal control circuit.

6. The device according to claim 1, characterized in that, The target safety voltage includes a plurality of sub-target safety voltages with different values, and each sub-target safety voltage is within a preset safety threshold voltage range; the working voltage of the internal control circuit is not higher than the maximum value of each sub-target safety voltage.

7. An intelligent toilet, characterized in that, It includes an internal control circuit and an electrical safety protection device as described in any one of claims 1-6 connected to the internal control circuit.

8. The intelligent toilet according to claim 7, characterized in that, The internal control circuit includes a main control board, a sensor assembly, a heater assembly, a solenoid valve assembly, and a motor assembly; The main control board is connected to the sensor assembly, the sensor assembly is connected to the heater assembly, and the heater assembly is connected to the solenoid valve assembly; The main control board, the sensor assembly, the solenoid valve assembly, and the motor assembly are respectively connected to the second voltage conversion unit.

Images