CN220983768U - Control circuit of heat preservation bowl - Google Patents
Control circuit of heat preservation bowl Download PDFInfo
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- CN220983768U CN220983768U CN202322503919.XU CN202322503919U CN220983768U CN 220983768 U CN220983768 U CN 220983768U CN 202322503919 U CN202322503919 U CN 202322503919U CN 220983768 U CN220983768 U CN 220983768U
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- 238000004321 preservation Methods 0.000 title claims abstract description 42
- 238000010438 heat treatment Methods 0.000 claims abstract description 83
- 239000003990 capacitor Substances 0.000 claims description 42
- 230000000087 stabilizing effect Effects 0.000 claims description 20
- 238000001514 detection method Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 4
- 238000005485 electric heating Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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Abstract
The utility model provides a heat preservation bowl control circuit which comprises a power supply module, a main control chip, a driving module and a display module, wherein the display module is used for displaying heating temperature and heating state; the driving module is used for driving the first heating film and the second heating film to heat, the first temperature sensor is used for detecting the working temperature of the first heating film, and the second temperature sensor is used for detecting the working temperature of the second heating film; the main control chip drives the first heating film and the second heating film simultaneously through the driving module to realize heating; the main control chip drives the first heating film independently through the driving module to realize heat preservation. According to the utility model, heating and heat preservation are realized through double driving and single driving, after heating is finished, the heat preservation temperature can be maintained, the MOS tube in the driving module is prevented from being frequently turned on and off, and the whole circuit can work for a long time.
Description
Technical Field
The utility model relates to the technical field of heat preservation bowls, in particular to a heat preservation bowl control circuit.
Background
With the development of technology, people pay more and more attention to quality of life. The heat preservation bowl is a tableware for keeping food at a required temperature, and the traditional heat preservation bowl consists of an electric heating plate, a bowl support, a small stainless steel bowl, a sealing bowl cover and a heat preservation cover.
In the traditional heat preservation bowl, the electric heating plate is only one. The main control chip firstly controls the electric heating plate to heat, then the temperature sensor senses the heating temperature to reach the preset upper temperature limit, the main control chip cuts off the power supply of the electric heating plate, the heat preservation bowl is naturally cooled, and after the temperature sensor senses the temperature to be reduced to the lower temperature limit, the electric heating plate is controlled to heat, so that the food is maintained at a certain temperature (heat preservation).
In the whole circuit control, the power supply of the electric heating disc needs to be frequently controlled to be connected and disconnected, and when the electric heating disc is used for a long time, the electric switch is frequently connected and disconnected, and is easy to damage.
Disclosure of utility model
The technical problems to be solved by the utility model are as follows: the heat preservation bowl control circuit solves the problem that the heat preservation bowl in the prior art needs frequent control of the on-off of an electric switch in a heating and heat preservation state to cause damage easily.
The utility model solves the problems by adopting the following technical scheme: the heat preservation bowl control circuit comprises a power supply module for supplying power, a main control chip, a driving module for driving a first heating film and a second heating film, and a display module for displaying heating temperature and heating state, wherein the main control chip is electrically connected with a battery, and the driving module and the display module are electrically connected with the main control chip; the driving module is as follows:
the main control chip is electrically connected with the grid electrode of the MOS tube Q1 through a resistor R11, the grid electrode of the MOS tube Q1 is grounded through a resistor R13, the source electrode of the MOS tube Q1 is grounded, the drain electrode of the MOS tube Q1 is electrically connected with the first end of the first heating film, the second end of the first heating film is electrically connected with the anode of the power module, the drain electrode of the MOS tube Q1 is connected with the resistor R10 in series and the resistor R12 is grounded, the connecting end of the resistor R10 and the resistor R12 is electrically connected with the main control chip, and the connecting end of the resistor R10 and the resistor R12 is grounded through a capacitor C12;
The main control chip is electrically connected with the grid electrode of the MOS tube Q2 through a resistor R19, the grid electrode of the MOS tube Q2 is grounded through a resistor R21, the source electrode of the MOS tube Q2 is grounded, the drain electrode of the MOS tube Q2 is electrically connected with the first end of the second heating film, the second end of the second heating film is electrically connected with the positive electrode of the power module, the drain electrode of the MOS tube Q2 is connected with the resistor R18 in series and the resistor R20 is grounded, the connecting end of the resistor R18 and the resistor R20 is electrically connected with the main control chip, and the connecting end of the resistor R18 and the connecting end of the resistor R20 are grounded through a capacitor C14;
The main control chip is electrically connected with the output end of the first temperature sensor, and the output end of the first temperature sensor is grounded through a capacitor C13 and a resistor R14 respectively; the main control chip is electrically connected with the output end of the second temperature sensor, and the output end of the second temperature sensor is grounded through a capacitor C15 and a resistor R22 respectively.
Compared with the prior art, the utility model has the advantages that: the main control chip drives the first heating film and the second heating film to heat at the same time, and the heating mode is adopted at the moment, and the main control chip obtains the heating temperature according to the second temperature sensor and displays the heating temperature and the heating state through the display module; the main control chip only drives the first heating film to heat, and is in a heat preservation mode at the moment, the main control chip obtains heat preservation temperature according to the first temperature sensor, and the heat preservation temperature is displayed through the display module; when the whole heat preservation bowl is switched to a heat preservation state in heating, the first heating film always works, the heat preservation temperature can be maintained, the MOS tube is prevented from being frequently switched on and off, and the whole circuit is ensured to work for a long time.
Preferably, the power module comprises a battery and a voltage stabilizing chip, the anode of the battery is electrically connected with the anode of the diode D3, the cathode of the diode D3 is electrically connected with the input end of the voltage stabilizing chip, the input end of the voltage stabilizing chip is grounded through a capacitor C8, the output end of the voltage stabilizing chip is electrically connected with the power end of the main control chip, the output end of the voltage stabilizing chip is grounded through a capacitor C7, and the second ends of the first heating film and the second heating film are electrically connected with the anode of the battery.
The technical scheme has the technical effects that: the battery passes through the voltage stabilizing chip, so that the voltage can be stabilized at the required voltage, and the main control chip can work stably.
Preferably, the power supply module further comprises a charging module for charging the battery, the charging module comprises a charging chip, and the charging chip is PL7501C;
The first pin of the charging chip is electrically connected with a charging power supply through a resistor R1, the first pin of the charging chip is grounded through a capacitor C1, the second pin of the charging chip is grounded through an inductor L1, the fourth pin of the charging chip is grounded through a capacitor C4 and a capacitor C5 respectively, the fourth pin of the charging chip is electrically connected with the negative electrode of a diode D1, the positive electrode of the diode D1 is electrically connected with the third pin of the charging chip, the fifth pin of the charging chip is electrically connected with the positive electrode of a battery, the fifth pin of the charging chip is grounded through a capacitor C6, the sixth pin of the charging chip is grounded through a resistor RSC 5, the seventh pin of the charging chip is electrically connected with the charging power supply through a resistor R2, and the eighth pin of the charging chip is electrically connected with a master control chip through a resistor R3;
The charging power supply is electrically connected with the positive electrode of the diode D2, the negative electrode of the diode D2 is electrically connected with the input end of the voltage stabilizing chip, the charging power supply is connected with the resistor R4 and the capacitor C3 in series and is grounded, and the charging power supply is grounded through the capacitor C2;
the display module further comprises a charging indicator light used for displaying charging of the battery and a full-charge indicator light used for displaying full charge of the battery, and the charging indicator light and the full-charge indicator light are electrically connected with the main control chip.
The technical scheme has the technical effects that: through the chip that charges, conveniently charge to the battery, and the charge state input to main control chip of chip that charges, main control chip can show the charge state through charge pilot lamp and full electricity pilot lamp, is convenient for look over whether the battery is full.
Preferably, the main control chip is electrically connected with a charging power supply access module, the charging power supply access module comprises a resistor R7 and a resistor R9, the charging power supply is connected with the resistor R7 and the resistor R9 in series and grounded, and the connecting end of the resistor R7 and the resistor R9 is electrically connected with the main control chip.
The technical scheme has the technical effects that: the main control chip detects whether the charging power supply is connected through whether the charging power supply is connected to the module or not, and after a voltage signal is obtained, the charging state information of the charging chip is received and displayed through the display module; if the voltage signal is not obtained, the charging state information of the charging chip is not received, and the data quantity required to be processed by the main control chip is reduced.
Preferably, the display module comprises a heating indicator lamp, a nixie tube driving chip and a nixie tube, wherein the heating indicator lamp and the nixie tube are electrically connected with the nixie tube driving chip, and the nixie tube driving chip is electrically connected with the main control chip.
The technical scheme has the technical effects that: the temperature data and the electric quantity percentage data are displayed through the nixie tube, so that the control and the observation are convenient.
Preferably, the main control chip is further electrically connected with an electric quantity detection module for detecting electric quantity of the battery, the electric quantity detection module comprises a resistor R6, a resistor R8 and a capacitor C9, the positive electrode of the battery is connected with the resistor R6 and the resistor R8 in series and then grounded, the capacitor C9 is connected with two ends of the resistor R8 in parallel, and the connecting ends of the resistor R6 and the resistor R8 are electrically connected with the main control chip;
The display module is also used for displaying the remaining percentage of the battery electric quantity, and the main control chip receives the voltage of the connecting end of the resistor R6 and the resistor R8 and processes the remaining percentage of the battery electric quantity to be displayed through the nixie tube.
The technical scheme has the technical effects that: the battery electric quantity is detected through the electric quantity detection module, and is displayed through the display module, so that observation is facilitated.
Preferably, the main control chip is electrically connected with a touch chip, and the touch chip is electrically connected with the touch switch through a resistor R23.
The technical scheme has the technical effects that: the touch switch is prevented from being mechanically damaged and is convenient to control, a starting signal is sent by pressing the touch switch for a short time, so that the main control chip controls the first heating film and the second heating film to heat, and the main control chip controls the nixie tube to display temperature information; the main control chip controls the nixie tube to display the battery electric quantity information by pressing the touch switch for a long time.
Drawings
FIG. 1 is a system block diagram of a control circuit for a thermal bowl according to the present utility model;
FIG. 2 is a circuit diagram of a display module of a control circuit of a thermal insulation bowl according to the utility model;
fig. 3 is a circuit diagram of a main control and power supply module of a control circuit of a heat preservation bowl according to the present utility model.
Detailed Description
In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
As shown in fig. 1 to 3, the present embodiment relates to a control circuit of a heat preservation bowl, which includes a power module for providing power, a main control chip, a driving module for driving a first heating film and a second heating film, and a display module for displaying heating temperature and heating state, wherein the main control chip is electrically connected with a battery, and the driving module and the display module are electrically connected with the main control chip.
Wherein, the drive module is:
The main control chip is electrically connected with the grid electrode of the MOS tube Q1 through a resistor R11, the grid electrode of the MOS tube Q1 is grounded through a resistor R13, the source electrode of the MOS tube Q1 is grounded, the drain electrode of the MOS tube Q1 is electrically connected with the first end of the first heating film, the second end of the first heating film is electrically connected with the positive electrode of the power supply module, the drain electrode of the MOS tube Q1 is connected with a resistor R10 and a resistor R12 in series and grounded, the connecting end of the resistor R10 and the resistor R12 is electrically connected with the main control chip, and the connecting end of the resistor R10 and the resistor R12 is grounded through a capacitor C12;
the main control chip is electrically connected with the grid electrode of the MOS tube Q2 through a resistor R19, the grid electrode of the MOS tube Q2 is grounded through a resistor R21, the source electrode of the MOS tube Q2 is grounded, the drain electrode of the MOS tube Q2 is electrically connected with the first end of the second heating film, the second end of the second heating film is electrically connected with the positive electrode of the power supply module, the drain electrode of the MOS tube Q2 is connected with a resistor R18 and a resistor R20 in series and grounded, the connecting end of the resistor R18 and the resistor R20 is electrically connected with the main control chip, and the connecting end of the resistor R18 and the resistor R20 is grounded through a capacitor C14;
The main control chip is electrically connected with the output end of the first temperature sensor, and the output end of the first temperature sensor is grounded through a capacitor C13 and a resistor R14 respectively; the main control chip is electrically connected with the output end of the second temperature sensor, and the output end of the second temperature sensor is grounded through a capacitor C15 and a resistor R22 respectively.
The main control chip drives the first heating film and the second heating film to heat at the same time, and the heating mode is adopted at the moment, and the main control chip obtains the heating temperature according to the second temperature sensor and displays the heating temperature and the heating state through the display module; the main control chip only drives the first heating film to heat, and is in a heat preservation mode at the moment, the main control chip obtains heat preservation temperature according to the first temperature sensor, and the heat preservation temperature is displayed through the display module; when the whole heat preservation bowl is switched to a heat preservation state in heating, the first heating film always works, the heat preservation temperature can be maintained, the MOS tube is prevented from being frequently switched on and off, and the whole circuit is ensured to work for a long time.
In this embodiment, the power module includes a battery and a voltage stabilizing chip, the positive pole of the battery is electrically connected with the positive pole of the diode D3, the negative pole of the diode D3 is electrically connected with the input end of the voltage stabilizing chip, the input end of the voltage stabilizing chip is grounded through the capacitor C8, the output end of the voltage stabilizing chip is electrically connected with the power end of the main control chip, the output end of the voltage stabilizing chip is grounded through the capacitor C7, and the first heating film second end and the second heating film second end are both electrically connected with the positive pole of the battery.
The battery passes through the voltage stabilizing chip, so that the voltage can be stabilized at the required voltage, and the main control chip can work stably. In this embodiment, the voltage regulator chip is a PL7501C voltage regulator chip.
The power supply module further comprises a charging module for charging the battery, the charging module comprises a charging chip, and the charging chip is PL7501C;
The first pin of the charging chip is electrically connected with a charging power supply through a resistor R1, the first pin of the charging chip is grounded through a capacitor C1, the second pin of the charging chip is grounded, the third pin of the charging chip is electrically connected with the charging power supply through an inductor L1, the fourth pin of the charging chip is respectively grounded through a capacitor C4 and a capacitor C5, the fourth pin of the charging chip is electrically connected with the cathode of a diode D1, the anode of the diode D1 is electrically connected with the third pin of the charging chip, the fifth pin of the charging chip is electrically connected with the anode of a battery, the fifth pin of the charging chip is grounded through a capacitor C6, the sixth pin of the charging chip is grounded through a resistor RSC, the seventh pin of the charging chip is electrically connected with the charging power supply through a resistor R5, and the eighth pin (charging state output pin, low level when charged and high level) of the charging chip is electrically connected with a main control chip through a resistor R3;
The charging power supply is electrically connected with the positive electrode of the diode D2, the negative electrode of the diode D2 is electrically connected with the input end of the voltage stabilizing chip, the charging power supply is connected with the resistor R4 and the capacitor C3 in series and grounded, and the charging power supply is grounded through the capacitor C2;
The display module further comprises a charging indicator lamp used for displaying charging of the battery and a full-charge indicator lamp used for displaying full charge of the battery, and the charging indicator lamp and the full-charge indicator lamp are electrically connected with the main control chip.
Through the chip that charges, conveniently charge to the battery, and the charge state input to main control chip of chip that charges, main control chip can show the charge state through charge pilot lamp and full electricity pilot lamp, is convenient for look over whether the battery is full.
In this embodiment, the main control chip is electrically connected with a charging power supply access module, the charging power supply access module includes a resistor R7 and a resistor R9, the charging power supply is connected in series with the resistor R7 and the resistor R9 to be grounded, and the connection end of the resistor R7 and the resistor R9 is electrically connected with the main control chip.
The main control chip detects whether the charging power supply is connected through whether the charging power supply is connected to the module or not, and after a voltage signal is obtained, the charging state information of the charging chip is received and displayed through the display module; if the voltage signal is not obtained, the charging state information of the charging chip is not received, and the data quantity required to be processed by the main control chip is reduced.
In this embodiment, the display module includes a heating indicator, a nixie tube driving chip and a nixie tube, where the heating indicator and the nixie tube are electrically connected to the nixie tube driving chip, and the nixie tube driving chip is electrically connected to the main control chip.
The temperature data and the electric quantity percentage data are displayed through the nixie tube, so that the control and the observation are convenient. Specifically, in the heating mode, the nixie tube displays the heating temperature obtained by the second temperature sensor; and under the heat preservation mode of the heat preservation bowl, the nixie tube displays the heat preservation temperature obtained by the first temperature sensor.
The main control chip is electrically connected with a touch chip, and the touch chip is electrically connected with the touch switch through a resistor R23.
The touch switch avoids mechanical damage, is convenient to control, sends a starting signal through pressing the touch switch for a short time, so that the main control chip controls the first heating film and the second heating film to heat, and the main control chip controls the nixie tube to display temperature information.
In this embodiment, the main control chip is further electrically connected to an electric quantity detection module for detecting electric quantity of the battery, the electric quantity detection module includes a resistor R6, a resistor R8 and a capacitor C9, the positive electrode of the battery is connected in series with the resistor R6 and the resistor R8 and then grounded, the capacitor C9 is connected in parallel to two ends of the resistor R8, and the connection ends of the resistor R6 and the resistor R8 are electrically connected to the main control chip;
The display module is also used for displaying the remaining percentage of the battery electric quantity, and the main control chip receives the voltage of the connecting ends of the resistor R6 and the resistor R8 and processes the remaining percentage of the battery electric quantity to be displayed through the nixie tube.
Specifically, if the main control chip calculates that the remaining battery power is 51%, if the time is long, the main control chip controls the nixie tube to display 51 according to the touch switch.
In the actual use process, the whole circuit can be designed on one circuit board, or two circuit boards are arranged: a driving circuit board and a display circuit board. The driving circuit board (shown in fig. 3) comprises a main control chip, a driving module, a power module, an electric quantity detection module and a charging power supply access module, the display circuit board (shown in fig. 2) comprises a touch switch, a touch chip and a display module, and the two circuit boards are connected through a socket CN1 and a socket CN 2.
The beneficial effects of the utility model are as follows: the main control chip drives the first heating film and the second heating film to heat at the same time, and the heating mode is adopted at the moment, and the main control chip obtains the heating temperature according to the second temperature sensor and displays the heating temperature and the heating state through the display module; the main control chip only drives the first heating film to heat, and is in a heat preservation mode at the moment, the main control chip obtains heat preservation temperature according to the first temperature sensor, and the heat preservation temperature is displayed through the display module; when the whole heat preservation bowl is switched to a heat preservation state in heating, the first heating film always works, the heat preservation temperature can be maintained, the MOS tube is prevented from being frequently switched on and off, and the whole circuit is ensured to work for a long time.
While the foregoing description illustrates and describes the preferred embodiments of the present utility model, it is to be understood that the utility model is not limited to the forms disclosed herein, but is not to be construed as limited to other embodiments, and is capable of numerous other combinations, modifications and environments and is capable of changes or modifications within the scope of the inventive concept as described herein, either as a result of the foregoing teachings or as a result of the knowledge or technology in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the utility model are intended to be within the scope of the appended claims.
Although the present disclosure is described above, the scope of protection of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the utility model.
Claims (7)
1. A heat preservation bowl control circuit is characterized in that: the device comprises a power supply module for supplying power, a main control chip, a driving module for driving a first heating film and a second heating film, and a display module for displaying heating temperature and heating state, wherein the main control chip is electrically connected with a battery, and the driving module and the display module are electrically connected with the main control chip; the driving module is as follows:
the main control chip is electrically connected with the grid electrode of the MOS tube Q1 through a resistor R11, the grid electrode of the MOS tube Q1 is grounded through a resistor R13, the source electrode of the MOS tube Q1 is grounded, the drain electrode of the MOS tube Q1 is electrically connected with the first end of the first heating film, the second end of the first heating film is electrically connected with the anode of the power module, the drain electrode of the MOS tube Q1 is connected with the resistor R10 in series and the resistor R12 is grounded, the connecting end of the resistor R10 and the resistor R12 is electrically connected with the main control chip, and the connecting end of the resistor R10 and the resistor R12 is grounded through a capacitor C12;
The main control chip is electrically connected with the grid electrode of the MOS tube Q2 through a resistor R19, the grid electrode of the MOS tube Q2 is grounded through a resistor R21, the source electrode of the MOS tube Q2 is grounded, the drain electrode of the MOS tube Q2 is electrically connected with the first end of the second heating film, the second end of the second heating film is electrically connected with the positive electrode of the power module, the drain electrode of the MOS tube Q2 is connected with the resistor R18 in series and the resistor R20 is grounded, the connecting end of the resistor R18 and the resistor R20 is electrically connected with the main control chip, and the connecting end of the resistor R18 and the connecting end of the resistor R20 are grounded through a capacitor C14;
The main control chip is electrically connected with the output end of the first temperature sensor, and the output end of the first temperature sensor is grounded through a capacitor C13 and a resistor R14 respectively; the main control chip is electrically connected with the output end of the second temperature sensor, and the output end of the second temperature sensor is grounded through a capacitor C15 and a resistor R22 respectively.
2. The thermal bowl control circuit of claim 1, wherein: the power module comprises a battery and a voltage stabilizing chip, the anode of the battery is electrically connected with the anode of a diode D3, the cathode of the diode D3 is electrically connected with the input end of the voltage stabilizing chip, the input end of the voltage stabilizing chip is grounded through a capacitor C8, the output end of the voltage stabilizing chip is electrically connected with the power end of the main control chip, the output end of the voltage stabilizing chip is grounded through a capacitor C7, and the second ends of the first heating film and the second heating film are electrically connected with the anode of the battery.
3. A thermos bowl control circuit according to claim 2, wherein: the power supply module further comprises a charging module for charging the battery, wherein the charging module comprises a charging chip, and the charging chip is PL7501C;
The first pin of the charging chip is electrically connected with a charging power supply through a resistor R1, the first pin of the charging chip is grounded through a capacitor C1, the second pin of the charging chip is grounded through an inductor L1, the fourth pin of the charging chip is grounded through a capacitor C4 and a capacitor C5 respectively, the fourth pin of the charging chip is electrically connected with the negative electrode of a diode D1, the positive electrode of the diode D1 is electrically connected with the third pin of the charging chip, the fifth pin of the charging chip is electrically connected with the positive electrode of a battery, the fifth pin of the charging chip is grounded through a capacitor C6, the sixth pin of the charging chip is grounded through a resistor RSC 5, the seventh pin of the charging chip is electrically connected with the charging power supply through a resistor R2, and the eighth pin of the charging chip is electrically connected with a master control chip through a resistor R3;
The charging power supply is electrically connected with the positive electrode of the diode D2, the negative electrode of the diode D2 is electrically connected with the input end of the voltage stabilizing chip, the charging power supply is connected with the resistor R4 and the capacitor C3 in series and is grounded, and the charging power supply is grounded through the capacitor C2;
the display module further comprises a charging indicator light used for displaying charging of the battery and a full-charge indicator light used for displaying full charge of the battery, and the charging indicator light and the full-charge indicator light are electrically connected with the main control chip.
4. A thermos bowl control circuit according to claim 3, wherein: whether the main control chip is connected with a charging power supply access module or not, whether the charging power supply access module comprises a resistor R7 and a resistor R9, the charging power supply is connected with the resistor R7 and the resistor R9 in series to be grounded, and the connecting end of the resistor R7 and the resistor R9 is electrically connected with the main control chip.
5. The thermal bowl control circuit of claim 1, wherein: the display module comprises a heating indicator lamp, a nixie tube driving chip and a nixie tube, wherein the heating indicator lamp and the nixie tube are electrically connected with the nixie tube driving chip, and the nixie tube driving chip is electrically connected with the main control chip.
6. The bowl control circuit of claim 5 wherein: the main control chip is also electrically connected with an electric quantity detection module for detecting the electric quantity of the battery, the electric quantity detection module comprises a resistor R6, a resistor R8 and a capacitor C9, the positive electrode of the battery is connected with the resistor R6 and the resistor R8 in series and then grounded, the capacitor C9 is connected with two ends of the resistor R8 in parallel, and the connecting ends of the resistor R6 and the resistor R8 are electrically connected with the main control chip;
The display module is also used for displaying the remaining percentage of the battery electric quantity, and the main control chip receives the voltage of the connecting end of the resistor R6 and the resistor R8 and processes the remaining percentage of the battery electric quantity to be displayed through the nixie tube.
7. The thermal bowl control circuit of claim 1, wherein: the main control chip is electrically connected with a touch chip, and the touch chip is electrically connected with the touch switch through a resistor R23.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322503919.XU CN220983768U (en) | 2023-09-14 | 2023-09-14 | Control circuit of heat preservation bowl |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322503919.XU CN220983768U (en) | 2023-09-14 | 2023-09-14 | Control circuit of heat preservation bowl |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220983768U true CN220983768U (en) | 2024-05-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322503919.XU Active CN220983768U (en) | 2023-09-14 | 2023-09-14 | Control circuit of heat preservation bowl |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220983768U (en) |
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2023
- 2023-09-14 CN CN202322503919.XU patent/CN220983768U/en active Active
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