CN216596892U - Circuit for switching and displaying multiplexing and gas stove - Google Patents
Circuit for switching and displaying multiplexing and gas stove Download PDFInfo
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- CN216596892U CN216596892U CN202122698045.9U CN202122698045U CN216596892U CN 216596892 U CN216596892 U CN 216596892U CN 202122698045 U CN202122698045 U CN 202122698045U CN 216596892 U CN216596892 U CN 216596892U
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Abstract
A circuit with switch and display multiplexing and a gas stove. The switch and display multiplexing circuit comprises a control module, a key module, a digital display module, a gas stove switch detection module and a power supply module; the key module is electrically connected with the control module and is used for adjusting the information displayed by the digital display module; the digital display module comprises a nixie tube display screen, the control module comprises a plurality of segment selection ports and a plurality of bit selection ports, the segment selection ports are electrically connected with segment selection pins of the nixie tube display screen, and the bit selection ports are electrically connected with bit selection pins of the nixie tube display screen; the gas stove switch detection module is electrically connected with one section selection port and comprises a control switch for controlling ignition; the power module comprises a power supply, a switch unit and an output unit which are electrically connected in sequence, and the switch unit is electrically connected with the gas stove switch detection module. The utility model can multiplex the I/O port of the control module and reduce the manufacturing cost.
Description
Technical Field
The utility model relates to the technical field of internal circuits of gas cookers, in particular to a circuit for multiplexing switching and display and a gas cooker.
Background
The circuits related in the gas stove mainly comprise a switch detection circuit, a power supply control circuit, a display circuit and the like, the circuits are generally connected with a main control chip, and the main control chip sends control signals to the circuits so as to control the whole circuit to work coordinately. As is well known, the more pins the main control chip has, the more powerful the main control chip generally has, but the cost is higher accordingly. However, the global environment is faced with the problem of chip shortage, and how to use a main control chip with fewer ports to realize the same circuit function is a technical problem that needs to be solved urgently in the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model provides a switch and display multiplexing circuit and a gas stove, which can multiplex an I/O port of a control module and reduce the manufacturing cost.
In order to solve the problems, the utility model adopts the following technical scheme:
according to a first aspect of the present invention, an embodiment of the present invention provides a switch and display multiplexing circuit, including a control module, a key module, a digital display module, a gas stove switch detection module, and a power supply module; the key module is electrically connected with the control module and is used for adjusting the information displayed by the digital display module; the digital display module comprises a nixie tube display screen, the control module comprises a plurality of segment selection ports and a plurality of bit selection ports, the segment selection ports are electrically connected with segment selection pins of the nixie tube display screen, and the bit selection ports are electrically connected with bit selection pins of the nixie tube display screen; the gas stove switch detection module is electrically connected with one section selection port and comprises a control switch for controlling ignition; the power module comprises a power supply, a switch unit and an output unit which are electrically connected in sequence, the switch unit is electrically connected with the gas stove switch detection module, and the switch unit switches the on-off state of the switch unit to be on or off according to the change of the on-off state of the control switch.
In some embodiments, the gas stove switch detection module further comprises a pull-up resistor, a protection resistor, an anti-reverse diode and a capacitor, wherein a segment selection port, the protection resistor and the anode of the anti-reverse diode are electrically connected in sequence, and the cathode of the anti-reverse diode, the control switch and the grounding end are electrically connected in sequence; the direct current power supply, the pull-up resistor and the positive electrode of the anti-reverse diode are electrically connected in sequence, and two ends of the capacitor are respectively electrically connected with the positive electrode of the anti-reverse diode and the grounding end.
In some embodiments, the switching unit comprises a MOS transistor, a MOS transistor pull-up resistor and a first diode, wherein two ends of the MOS transistor pull-up resistor are electrically connected with a source electrode and a gate electrode of the MOS transistor respectively, the source electrode of the MOS transistor is electrically connected with a power supply, and the drain electrode of the MOS transistor is electrically connected with the output unit; the grid electrode of the MOS tube is electrically connected with the anode of the first diode, and the cathode of the first diode is electrically connected with the cathode of the anti-reverse diode.
In some embodiments, two gas stove switch detection modules are provided, and two segment selection ports are respectively electrically connected with the protection resistors of the two gas stove switch detection modules; the switch unit further comprises a second diode, the anode of the second diode is electrically connected with the grid electrode of the MOS tube, and the cathode of the first diode and the cathode of the second diode are respectively electrically connected with the cathodes of the two anti-reverse diodes.
In some embodiments, the MOS transistor is a P-channel MOS transistor.
In some embodiments, the power source is a battery.
In some embodiments, the output unit includes a voltage stabilization chip.
In some embodiments, the input end and the output end of the voltage stabilizing chip are electrically connected with a filter capacitor.
In some embodiments, the nixie tube display screen comprises a two-digit seven-segment nixie tube.
In some embodiments, the key module comprises a touch key.
According to a second aspect of the present invention, an embodiment of the present invention provides a gas stove, including the switch and display multiplexing circuit of any one of the embodiments of the first aspect.
The utility model has at least the following beneficial effects: the gas stove switch detection module and the nixie tube display screen multiplex a position selection port of the control module, the control module can detect the switch state of the control switch through the position selection port, and can lighten the nixie tube display screen or stop displaying the nixie tube according to the switch state of the control switch. Meanwhile, the switch unit switches the switch state of the switch unit to be on or off according to the change of the switch state of the control switch, so that the control switch can control whether the gas stove is ignited to work. Therefore, the utility model reuses the I/O port of the control module, reserves the original circuit function, does not need the control module with higher cost and reduces the manufacturing cost.
Drawings
FIG. 1 is a schematic diagram of a switch and display multiplexing circuit according to an embodiment of the utility model;
fig. 2 is a schematic circuit diagram of a gas stove switch detection module according to an embodiment of the utility model;
FIG. 3 is a schematic circuit diagram of a power module according to an embodiment of the utility model;
FIG. 4 is a schematic circuit diagram of a gas stove switch detection module, a control module and a key module according to an embodiment of the utility model;
fig. 5 is a circuit diagram of a digital display module according to an embodiment of the utility model.
Wherein the reference numerals are: the gas stove comprises a control module 100, a key module 200, a digital display module 300, a gas stove switch detection module 400, a power supply module 500, a power supply 510, a switch unit 520 and an output unit 530.
Detailed Description
The present disclosure provides the following description with reference to the accompanying drawings to assist in a comprehensive understanding of various embodiments of the disclosure as defined by the claims and their equivalents. The description includes various specific details to aid understanding, but such details are to be regarded as exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the various embodiments described herein can be made without departing from the scope and spirit of the present disclosure. Moreover, descriptions of well-known functions and constructions may be omitted for clarity and conciseness.
The terms and words used in the following description and claims are not limited to the literal meanings, but are used by the inventors to enable a clear and consistent understanding of the disclosure. Accordingly, it will be apparent to those skilled in the art that the following descriptions of the various embodiments of the present disclosure are provided for illustration only and not for the purpose of limiting the disclosure as defined by the appended claims and their equivalents.
The terms "having," "may have," "including," or "may include" used in various embodiments of the present disclosure indicate the presence of the respective functions, operations, elements, etc., disclosed, but do not limit additional one or more functions, operations, elements, etc. Furthermore, it is to be understood that the terms "comprises" or "comprising," when used in various embodiments of the present disclosure, are intended to specify the presence of stated features, integers, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, operations, elements, components, or groups thereof.
It will be understood that when an element (e.g., a first element) is "connected" to another element (e.g., a second element), the element can be directly connected to the other element or intervening elements (e.g., a third element) may be present.
An embodiment of the present invention provides a switch and display multiplexing circuit, as shown in fig. 1, which includes a control module 100, a key module 200, a digital display module 300, a gas stove switch detection module 400, and a power module 500. The control module 100 may be a single-chip microcomputer chip having a plurality of I/O ports (input/output ports), for example, the chip BF7612CM 28. The key module 200 includes a key for user operation, which is electrically connected to the control module 100, and the user can adjust relevant parameters of the gas stove, such as adjusting the time of the timer switch. The digital display module 300 includes a nixie tube display screen, which can display information adjusted by the user through the key module 200 to facilitate human-computer interaction. The nixie tube display screen comprises a plurality of segment selection pins and a plurality of bit selection pins, the I/O port of the control module 100 comprises a plurality of segment selection ports and a plurality of bit selection ports, the number of the segment selection ports is consistent with that of the segment selection pins, and the number of the bit selection ports is consistent with that of the bit selection pins. The segment selection port of the control module 100 is electrically connected with the segment selection pin of the nixie tube display screen, and the bit selection port is electrically connected with the bit selection pin of the nixie tube display screen, so that the control module 100 performs bit selection and segment selection control, and the nixie tube display screen can display corresponding information such as numbers or letters.
One of the plurality of segment selection ports is a multiplexing port (if the gas stove switch detection module 400 has a plurality of segments, the multiplexing port is also provided with a plurality of segments), the gas stove switch detection module 400 is electrically connected with the multiplexing segment selection port, and the gas stove switch detection module 400 comprises a control switch for controlling ignition, and the control switch can be a microswitch or a knob switch, etc. The user operates the control switch to ignite the corresponding igniter, so that the gas stove is ignited to work. The control module 100 will scan and detect the switch status of the control switch and send out a control signal according to the switch status. In a common state, the control switch does not control the ignition work of the gas stove, the multiplexing section selection port outputs a driving signal to the nixie tube display screen to enable the nixie tube display screen to work, and when the control switch is switched to a working state for controlling the ignition work of the gas stove, the position selection pin of the control module 100 outputs a level signal to enable the nixie tube display screen to stop working.
The power module 500 includes a power source 510, a switch unit 520, and an output unit 530 electrically connected in sequence, wherein the power source 510 is used for providing power, and the output unit outputs a corresponding voltage signal for the igniter to work. The switch unit 520 is connected in series between the power supply 510 and the output unit 530, and the switch unit 520 switches on or off the control circuit, so as to control whether the gas stove is ignited to operate. Specifically, the switch unit 520 is electrically connected to the gas stove switch detection module 400, and the switch unit 520 switches the on-off state thereof to be on or off according to the change of the on-off state of the control switch, that is, when the on-off state of the control switch changes, the on-off state of the switch unit 520 also changes, which is equivalent to controlling whether the gas stove is ignited or not through the control switch.
Because the gas stove switch detection module 400 and the nixie tube display screen of the embodiment multiplex the bit selection port of the control module 100, the occupation of pins of the control module can be reduced, and a control module with higher cost is not needed, thereby reducing the manufacturing cost.
In some embodiments, as shown in fig. 2, the gas stove switch detection module further includes a pull-up resistor R1, a protection resistor R2, an anti-reverse diode D1 and a capacitor C1, and the control switch is a control switch SW1 in fig. 2. A segment selection port of the control module, the protection resistor and the anode of the anti-reverse diode are electrically connected in sequence, and the cathode of the anti-reverse diode, the control switch and the grounding end are electrically connected in sequence. The direct current power supply, the pull-up resistor and the positive electrode of the anti-reverse diode are electrically connected in sequence, and two ends of the capacitor are respectively electrically connected with the positive electrode of the anti-reverse diode and the grounding end. The capacitor C1 is used for filtering to avoid the interference of foreign waves.
When the control switch is turned off, a current signal of the direct current power supply flows to the multiplexed segment selection port, the multiplexed segment selection port is at a high level, when the control switch is turned off, the direct current power supply is grounded, and the multiplexed segment selection port is at a low level, so that the control module detects the switching state of the control switch by scanning the level signal of the multiplexed segment selection port. For example, the scanning period of the nixie tube display screen is set to be 11ms, wherein the time for detecting the level signal of the multiplexed segment selection port is 0.5ms, and the remaining 10.5ms is used for detecting the level signal of the segment selection port.
Further, as shown in fig. 3, the switching unit includes a MOS transistor Q1, a MOS transistor pull-up resistor R15, and a first diode D3, where two ends of the MOS transistor pull-up resistor are electrically connected to a source and a gate of the MOS transistor, respectively, the source of the MOS transistor is electrically connected to the power supply BT1, and the drain of the MOS transistor is electrically connected to the output unit. The grid electrode of the MOS tube is electrically connected with the anode of the first diode, and the cathode of the first diode is electrically connected with the cathode of the anti-reverse diode. Therefore, the MOS tube is switched on or off according to the switching state of the control switch.
The MOS tube is preferably a P-channel MOS tube. When the control switch is switched off, the grid electrode of the MOS tube is at a high level, and the MOS tube is not conducted, so that the waste of the electric quantity of the power supply can be reduced. When the control switch is closed, the grid of the MOS tube is at a low level, the MOS tube is conducted, and the output unit can output a voltage signal so as to provide electric energy required by the igniter.
In some embodiments, as shown in fig. 4, two gas stove switch detection modules are provided, and two segment selection ports (port IO1 and port IO7) are electrically connected to the protection resistors (resistor R2 and resistor R4) of the two gas stove switch detection modules respectively. As shown in fig. 3, the switching unit further includes a second diode D4, an anode of the second diode is electrically connected to the gate of the MOS transistor, and a cathode of the first diode and a cathode of the second diode are electrically connected to cathodes of the two anti-reverse diodes, respectively.
Because the gas stove generally has two furnaces, the two gas stove switch detection modules of the embodiment can respectively correspond to the two furnaces, and the two control switches correspondingly control the ignition work of the two furnaces.
In some embodiments, the power supply is a battery, and an external power supply is not needed, so that the circuit structure can be simplified.
In some embodiments, the output unit includes a voltage regulation chip, which may be HT7733, to output a stable 3.3V dc voltage.
Further, the input end and the output end of the voltage stabilizing chip are electrically connected with a filter capacitor, as shown in fig. 3, two ends of the voltage stabilizing chip HT7733 are electrically connected with capacitors C3 and C4, respectively, so as to filter out impurity waves in the circuit.
In some embodiments, as shown in fig. 5, the nixie tube display screen includes two-bit seven-segment nixie tubes, and accordingly, as shown in fig. 4, the control module 100 has seven segment selection ports (ports IO1, IO2, IO3, IO4, IO5, IO6, and IO7) and two bit selection ports (ports COM1 and COM 2). If more contents need to be displayed, a four-digit seven-segment nixie tube display screen can be selected.
In some embodiments, the key module 200 includes a touch key, which may particularly include a touch spring. As shown in fig. 4, two touch keys TK1 and TK2 are provided, and the touch keys, the protective resistor (resistor R14 and resistor R13), and the control module 100 are electrically connected in sequence. The control module 100 determines whether the touch key is triggered by sensing a change in capacitance of the touch spring.
The embodiment of the utility model also provides a gas stove which comprises the switch and display multiplexing circuit of any one of the embodiments.
The foregoing is a more detailed description of the present invention that is presented in conjunction with specific embodiments, and the practice of the utility model is not to be considered limited to those descriptions. It will be apparent to those skilled in the art that a number of simple derivations or substitutions can be made without departing from the inventive concept.
Claims (10)
1. A switch and display multiplexing circuit, characterized by: the gas stove switch detection device comprises a control module, a key module, a digital display module, a gas stove switch detection module and a power supply module; the key module is electrically connected with the control module and is used for adjusting the information displayed by the digital display module; the digital display module comprises a nixie tube display screen, the control module comprises a plurality of segment selection ports and a plurality of position selection ports, the segment selection ports are electrically connected with segment selection pins of the nixie tube display screen, and the position selection ports are electrically connected with position selection pins of the nixie tube display screen; the gas stove switch detection module is electrically connected with one section selection port and comprises a control switch for controlling ignition; the power module comprises a power supply, a switch unit and an output unit which are electrically connected in sequence, the switch unit is electrically connected with the gas stove switch detection module, and the switch unit switches the on-off state of the switch unit to be on or off according to the change of the on-off state of the control switch.
2. The switch and display multiplexing circuit of claim 1, wherein: the gas stove switch detection module further comprises a pull-up resistor, a protection resistor, an anti-reverse diode and a capacitor, wherein a section selection port, the protection resistor and the anode of the anti-reverse diode are electrically connected in sequence, and the cathode of the anti-reverse diode, the control switch and the grounding end are electrically connected in sequence; the direct current power supply, the pull-up resistor and the positive electrode of the anti-reverse diode are electrically connected in sequence, and two ends of the capacitor are respectively electrically connected with the positive electrode of the anti-reverse diode and the grounding end.
3. The switching and display multiplexing circuit of claim 2, wherein: the switch unit comprises an MOS tube, an MOS tube pull-up resistor and a first diode, wherein two ends of the MOS tube pull-up resistor are respectively and electrically connected with a source electrode and a grid electrode of the MOS tube, the source electrode of the MOS tube is electrically connected with a power supply, and a drain electrode of the MOS tube is electrically connected with the output unit; the grid electrode of the MOS tube is electrically connected with the anode of the first diode, and the cathode of the first diode is electrically connected with the cathode of the anti-reverse diode.
4. The switching and display multiplexing circuit of claim 3, wherein: the two gas stove switch detection modules are arranged, and the two section selection ports are respectively and electrically connected with the protection resistors of the two gas stove switch detection modules; the switch unit further comprises a second diode, the anode of the second diode is electrically connected with the grid electrode of the MOS tube, and the cathode of the first diode and the cathode of the second diode are respectively electrically connected with the cathodes of the two anti-reverse diodes.
5. The switching and display multiplexing circuit of claim 3, wherein: the MOS tube is a P-channel MOS tube.
6. The switching and display multiplexing circuit according to any one of claims 1-5, wherein: the power source is a battery.
7. A switching and display multiplexing circuit according to any of claims 1 to 5, wherein: the output unit comprises a voltage stabilizing chip.
8. The switching and display multiplexing circuit of claim 7, wherein: and the input end and the output end of the voltage stabilizing chip are electrically connected with a filter capacitor.
9. A switching and display multiplexing circuit according to any of claims 1 to 5, wherein: the nixie tube display screen comprises two-digit seven-segment nixie tubes.
10. A gas stove is characterized in that: a circuit comprising a switch and display multiplex as claimed in any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122698045.9U CN216596892U (en) | 2021-11-05 | 2021-11-05 | Circuit for switching and displaying multiplexing and gas stove |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122698045.9U CN216596892U (en) | 2021-11-05 | 2021-11-05 | Circuit for switching and displaying multiplexing and gas stove |
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| CN216596892U true CN216596892U (en) | 2022-05-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116774638A (en) * | 2023-08-21 | 2023-09-19 | 北京领创医谷科技发展有限责任公司 | Switching circuit applied to external energy controller |
-
2021
- 2021-11-05 CN CN202122698045.9U patent/CN216596892U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116774638A (en) * | 2023-08-21 | 2023-09-19 | 北京领创医谷科技发展有限责任公司 | Switching circuit applied to external energy controller |
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