CN212326274U - Low-pressure seat ring heating intelligent closestool with hardware overtemperature protection function - Google Patents
Low-pressure seat ring heating intelligent closestool with hardware overtemperature protection function Download PDFInfo
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- CN212326274U CN212326274U CN202020084677.9U CN202020084677U CN212326274U CN 212326274 U CN212326274 U CN 212326274U CN 202020084677 U CN202020084677 U CN 202020084677U CN 212326274 U CN212326274 U CN 212326274U
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Abstract
The utility model provides a low pressure seat circle heating intelligent closestool of hardware overtemperature protection realizes low voltage power supply and excess temperature protect function, and it is including the seat circle that distributes there is the heater, its characterized in that: the circuit part comprises a CPU, a temperature detection circuit, a light detection circuit, a key module, a Bluetooth module, a seat ring protection circuit and a seat ring heating circuit, wherein the seat ring protection circuit acquires the temperature information of the seat ring and shuts down the seat ring heating circuit when the temperature exceeds a preset temperature. In the aspect of temperature control, in order to prevent the program from running away and causing high temperature, a hardware protection circuit is added, even if software fails, the seat ring can be automatically protected from exceeding 41 degrees, and scalding accidents are effectively prevented. In the aspect of power supply, an adapter with safe voltage of 24V and below 24V is adopted, the power is between 5W and 60W, the voltage is reduced to be below the safe voltage of 24V and below 24V for safe use, and the condition that the seat ring is damaged and no life risk exists is ensured.
Description
Technical Field
The utility model relates to a low pressure seat circle heating intelligent closestool of hardware overtemperature protection.
Background
At present, the toilet heating cover plate is basically powered by 220V, if a seat ring is damaged, an electric shock accident can be easily caused, the danger coefficient is high, the existing toilet heating cover plate only has heating and closing modes, hardware temperature protection exceeding 41 ℃ is not provided, and once a CPU is out of control, high temperature (exceeding 42 ℃) of the seat ring is easily caused.
SUMMERY OF THE UTILITY MODEL
For overcoming the defect that prior art exists, the utility model provides a low pressure seat circle heating intelligent closestool of hardware overtemperature protection realizes low-voltage power supply and excess temperature protect function, and its concrete technical content is as follows:
the utility model provides a low pressure seat circle heating intelligent closestool of hardware overtemperature protection, is including the seat circle that distributes and has the heater, and its circuit part includes CPU, temperature detection circuit, light detection circuit, button module, bluetooth module, seat circle protection circuit and seat circle heating circuit, the temperature information of seat circle is acquireed to the seat circle protection circuit, shuts down seat circle heating circuit when exceeding the preliminary temperature.
In one or more embodiments of the present invention, the seat ring protection circuit includes a seat ring heating switch circuit and an AD voltage comparison circuit; the seat ring heating switch circuit comprises a MOS tube Q1, diodes D3 and D4 and a current-limiting resistor R3, wherein the drain electrode of the MOS tube Q1 is connected with a DC direct current source through a diode D4, and the grid electrode of the MOS tube Q1 is connected with a heating control pin of a CPU; the AD voltage comparison circuit comprises an operational amplifier U4A, resistors R12 and R13, wherein the resistors R12 and R13 are connected in series between a 3.3V direct current source and a ground end, the connection point of the resistors R12 and R13 is connected to the positive phase input end of an operational amplifier U4A, reference voltage is set according to the reference voltage, the negative phase input end of the operational amplifier U4A is connected to a temperature detection circuit to obtain seat temperature AD voltage, the output end of the operational amplifier U4A is connected with the cathode of a diode D3, and the anode of the diode D3 is connected with the grid of a MOS tube Q1.
In one or more embodiments of the present invention, the seat ring protection circuit further includes a failure voltage comparison circuit, the failure voltage comparison circuit includes an operational amplifier U4B, a switch diode D9, a capacitor C3 and a capacitor C9, the 1 split positive electrode of the switch diode D9 is grounded, the 2 split positive electrodes of the switch diode D9 are connected to the positive input terminal of the operational amplifier U4B, the 2 split positive electrodes of the switch diode D9 are connected to the pulse output pin of the CPU through the capacitor C3, and the output terminal of the operational amplifier U4B is connected to the cathode of the diode D3.
In one or more embodiments of the present invention, the temperature detection circuit includes a diode D7, resistors R7 and R11, and a capacitor C12; the diode D7, the resistor R7 and the resistor R11 are connected in series between a 3.3V direct current source and the ground, the connection point of the resistor R7 and the resistor R11 is connected to the thermal resistance sensor, the connection point of the diode D7 and the resistor R7 serves as the output end of the temperature detection circuit, and the capacitor C12 is connected to the output end.
In one or more embodiments of the present invention, a 24V DC adapter is provided.
The utility model has the advantages that: in the aspect of temperature control, in order to prevent the program from running away and causing high temperature, a hardware protection circuit is added, even if software fails, the seat ring can be automatically protected from exceeding 41 degrees, and scalding accidents are effectively prevented. In the aspect of power supply, an adapter with safe voltage of 24V and below 24V is adopted, the power is between 5W and 60W, the voltage is reduced to be below the safe voltage of 24V and below 24V for safe use, and the condition that the seat ring is damaged and life danger is avoided is guaranteed.
Drawings
Fig. 1 is a schematic diagram of the present invention.
Fig. 2 is a circuit diagram of the CPU control circuit of the present invention.
Fig. 3 is a circuit diagram of the seat temperature detection circuit of the present invention.
Fig. 4 is a circuit diagram of the seat temperature control and protection circuit of the present invention.
FIG. 5 is a circuit diagram of the power supply of the present invention
Fig. 6 is a circuit diagram of the switching power supply chip of the present invention for voltage reduction.
Detailed Description
The scheme of the present application is further described below with reference to the accompanying drawings, 1 to 6:
referring to the attached figure 1, the low-voltage seat ring heating intelligent closestool with hardware overtemperature protection comprises a seat ring distributed with heating wires, wherein a circuit part of the seat ring comprises a CPU (central processing unit), a temperature detection circuit, a light detection circuit, a key module, a Bluetooth module, a seat ring protection circuit and a seat ring heating circuit, the seat ring protection circuit acquires temperature information of the seat ring, and the seat ring heating circuit is shut down when the temperature exceeds a preset temperature.
Referring to fig. 2, the seat ring protection circuit comprises a seat ring heating switch circuit, an AD voltage comparison circuit and a failure voltage comparison circuit; the method comprises the following steps:
the seat ring heating switch circuit comprises a MOS tube Q1, diodes D3 and D4 and a current-limiting resistor R3, wherein the drain electrode (D pole) of the MOS tube Q1 is connected with a DC direct current source through a diode D4, and the grid electrode (G pole) of the MOS tube Q1 is connected with a heating control pin of a CPU. The CPU controls the grid voltage of the MOS tube Q1 to realize on-off control of the heating circuit of the seat ring, and generally sets the heating temperature to 37 degrees (+/-2 degrees) through a program, and the seat ring heating is turned off when the heating temperature exceeds 39 degrees.
The AD voltage comparison circuit comprises an operational amplifier U4A, resistors R12 and R13, wherein the resistors R12 and R13 are connected in series between a 3.3V direct current source and a ground end, the connection point of the resistors R12 and R13 is connected to the positive phase input end of an operational amplifier U4A, reference voltage is set according to the reference voltage, the negative phase input end of the operational amplifier U4A is connected to a temperature detection circuit to obtain seat temperature AD voltage, the output end of the operational amplifier U4A is connected with the cathode of a diode D3, and the anode of the diode D3 is connected with the control electrode of a MOS transistor Q1. When the voltage value of the seat temperature AD voltage is higher than the reference voltage, that is, the voltage at the negative phase input end of the operational amplifier U4A is higher than that at the positive phase input end, at this time, the operational amplifier U4A outputs a low level, and controls the MOS transistor Q1 to be in an off state, and the seat heating circuit is turned off. According to the voltage division of the resistors R12 and R13, the reference voltage Ua is made to correspond to the temperature value of 41 degrees centigrade, when the MCU is halted or is not controlled and the seat ring is not heated in a controlled manner, the seat ring heating circuit (namely a heating wire) is closed when the seat temperature fed back by the temperature detection circuit is higher than 41 degrees, and automatic protection is realized.
The race protection circuit further comprises a failure voltage comparison circuit, the failure voltage comparison circuit comprises an operational amplifier U4B, a switch diode D9, a capacitor C3 and a capacitor C9, the anode of a split body 1 of the switch diode D9 is grounded, the anode of a split body 2 of the switch diode D9 is connected with the positive phase input end of the operational amplifier U4B, the anode of the split body 2 of the switch diode D9 is connected to a pulse output pin of a CPU through a capacitor C3, and the output end of the operational amplifier U4B is connected with the cathode of a diode D3. When the CPU is halted or is not controlled, the pulse output pin of the CPU cannot generate a pulse signal, the voltage of the negative phase input end (pin is suspended or grounded, and the reference voltage Ub) of the operational amplifier U4B is higher than that of the positive phase input end, so that the operational amplifier U4B outputs a low level, the MOS transistor Q1 is controlled to be in a cut-off state, and the seat ring heating circuit is turned off.
Referring to fig. 3, the temperature detection circuit includes a diode D7, resistors R7 and R11, and a capacitor C12; the diode D7, the resistor R7 and the resistor R11 are connected in series between a 3.3V direct current source and the ground, the connection point of the resistor R7 and the resistor R11 is connected to the thermal resistance sensor, the connection point of the diode D7 and the resistor R7 serves as the output end of the temperature detection circuit, and the capacitor C12 is connected to the output end. The temperature of the seat ring is sensed by a thermistor sensor which is externally connected with a J3 port, the thermistor sensor DC3.3V is divided by a resistor R11 and then sent to a CPU analog voltage signal, the divided voltage signal is sent to different voltage values of the CPU at different temperatures, and the CPU analyzes the different AD values, so that the temperature change is judged.
In the aspect of a power supply circuit, the intelligent low-voltage seat ring heating closestool is provided with a 24V direct-current adapter, so that a 220V voltage electric shock accident is avoided, the specific power supply circuit is implemented with reference to the attached drawing 4, a terminal J2 is connected with the adapter, and the voltage is reduced to DC3.3V after being processed by a switching power supply chip U1 (the model is MCP 16301) to supply power to a CPU and a Bluetooth module. DV 24V supplies power to a heating wire J4, the heating wire is wound into a seat ring shape by a heating wire and is uniformly distributed, and the surface temperature of the seat ring is slowly raised after the heating wire is electrified.
In addition, the temperature detection circuit, the light detection circuit, the Bluetooth module and the like of the intelligent seat ring heating device are implemented with reference to the attached figures 5-6, the Bluetooth module U3 receives an instruction sent by the mobile phone APP, and the CPU controls the seat ring to be opened, closed and heated at regular time after the seat ring is analyzed by the serial port. When a person is sensed by the photosensitive sensing device D5, the internal resistance changes, the photosensitive detection voltage value changes, and the CPU judges whether the person is used or not according to the voltage change. If the heater is used by a person, the heating function is turned on as long as the heater is not in a normally-off setting, i.e., the PIN11 of the CPU is high. A high level indicates on heating and a low level indicates no heating. When the bezel is heated, the LED light D6 is flashing.
The above preferred embodiments should be considered as examples of the embodiments of the present application, and technical deductions, substitutions, improvements and the like similar to, similar to or based on the embodiments of the present application should be considered as the protection scope of the present patent.
Claims (5)
1. The utility model provides a low pressure seat circle heating intelligent closestool of hardware overtemperature protection, includes the seat circle that distributes and has the heater, its characterized in that: the circuit part comprises a CPU, a temperature detection circuit, a light detection circuit, a key module, a Bluetooth module, a seat ring protection circuit and a seat ring heating circuit, wherein the seat ring protection circuit acquires the temperature information of the seat ring and shuts down the seat ring heating circuit when the temperature exceeds a preset temperature.
2. The hardware overtemperature protected low pressure seat ring heating intelligent toilet bowl as set forth in claim 1, characterized in that: the seat ring protection circuit comprises a seat ring heating switch circuit and an AD voltage comparison circuit;
the seat ring heating switch circuit comprises a MOS tube Q1, diodes D3 and D4 and a current-limiting resistor R3, wherein the drain electrode of the MOS tube Q1 is connected with a DC direct current source through a diode D4, and the grid electrode of the MOS tube Q1 is connected with a heating control pin of a CPU;
the AD voltage comparison circuit comprises an operational amplifier U4A, resistors R12 and R13, wherein the resistors R12 and R13 are connected in series between a 3.3V direct current source and a ground end, the connection point of the resistors R12 and R13 is connected to the positive phase input end of an operational amplifier U4A, reference voltage is set according to the reference voltage, the negative phase input end of the operational amplifier U4A is connected to a temperature detection circuit to obtain seat temperature AD voltage, the output end of the operational amplifier U4A is connected with the cathode of a diode D3, and the anode of the diode D3 is connected with the grid of a MOS tube Q1.
3. The hardware overtemperature protected low pressure seat ring heating intelligent toilet bowl as set forth in claim 2, characterized in that: the race protection circuit further comprises a failure voltage comparison circuit, the failure voltage comparison circuit comprises an operational amplifier U4B, a switch diode D9, a capacitor C3 and a capacitor C9, the anode of a split body 1 of the switch diode D9 is grounded, the anode of a split body 2 of the switch diode D9 is connected with the positive phase input end of the operational amplifier U4B, the anode of the split body 2 of the switch diode D9 is connected to a pulse output pin of a CPU through a capacitor C3, and the output end of the operational amplifier U4B is connected with the cathode of a diode D3.
4. The hardware overtemperature protected low pressure seat ring heating intelligent toilet bowl as set forth in claim 2, characterized in that: the temperature detection circuit comprises a diode D7, resistors R7 and R11 and a capacitor C12; the diode D7, the resistor R7 and the resistor R11 are connected in series between a 3.3V direct current source and the ground, the connection point of the resistor R7 and the resistor R11 is connected to the thermal resistance sensor, the connection point of the diode D7 and the resistor R7 serves as the output end of the temperature detection circuit, and the capacitor C12 is connected to the output end.
5. The hardware overtemperature protected low-pressure seat ring heating intelligent closestool according to any one of claims 1 to 4, characterized in that: A24V DC adapter is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020084677.9U CN212326274U (en) | 2020-01-15 | 2020-01-15 | Low-pressure seat ring heating intelligent closestool with hardware overtemperature protection function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020084677.9U CN212326274U (en) | 2020-01-15 | 2020-01-15 | Low-pressure seat ring heating intelligent closestool with hardware overtemperature protection function |
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| CN212326274U true CN212326274U (en) | 2021-01-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114794949A (en) * | 2022-04-07 | 2022-07-29 | 宁波吉田智能洁具科技有限公司 | Seat ring heating control system and control method of intelligent toilet with detachable seat ring |
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2020
- 2020-01-15 CN CN202020084677.9U patent/CN212326274U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114794949A (en) * | 2022-04-07 | 2022-07-29 | 宁波吉田智能洁具科技有限公司 | Seat ring heating control system and control method of intelligent toilet with detachable seat ring |
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