CN204406256U - The feedback circuit of solenoid valve and electromagnetic load equipment - Google Patents
The feedback circuit of solenoid valve and electromagnetic load equipment Download PDFInfo
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- CN204406256U CN204406256U CN201520073506.5U CN201520073506U CN204406256U CN 204406256 U CN204406256 U CN 204406256U CN 201520073506 U CN201520073506 U CN 201520073506U CN 204406256 U CN204406256 U CN 204406256U
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- solenoid valve
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Abstract
The utility model provides a kind of feedback circuit and electromagnetic load equipment of solenoid valve, is applicable to electromagnetic load equipment, and wherein, the feedback circuit of described solenoid valve comprises: microprocessor, is provided with modulation signal output terminal and feedback signal collection terminal; Supply module, the input end of described supply module is connected to described modulation signal output terminal, the output terminal of described supply module is connected to described electromagnetic load equipment, arrange feedback signal output between described supply module and ground wire, described feedback signal output is connected to described feedback signal collection terminal.By this technical scheme, make the pressure limiting pressure continuously adjustabe of the cooking apparatus such as electric pressure cooking saucepan, reach the object of reduction of blood pressure in high-speed and boiling cooking food.
Description
Technical field
The utility model relates to electric pressure cooking saucepan field, more specifically, relates to a kind of feedback circuit of solenoid valve and a kind of electromagnetic load equipment.
Background technology
At present, as shown in Figure 1 to Figure 3, the electromagnetic load equipment such as the solenoid valve in correlation technique, comprise: 201 vent valves, 202 inhale flat thin magnet, 203 permanent magnets and 13 solenoids, in order to the effect making the cooking apparatus such as electric pressure cooking saucepan reach boiling in cooking process, solution in correlation technique uses solenoid valve intermittently to promote exhaust steam valve exhaust 201, electricity load is applied to control the repulsive force to permanent magnet 203 to inhaling flat thin magnet 202 by solenoid 13, but, the program cannot change the pressure limiting pressure of control voltage power pot (as shown in Figure 3, continuous voltage is provided to keep the constant repulsive force to vent valve to solenoid) when VCC conducting, cause the pot inner pressure change of the cooking apparatus such as electric pressure cooking saucepan greatly, the problems such as the interior liquid of pot easily sprays.In addition, the pressure valve of the multiple pressure limiting pressure in correlation technique adopts physical construction to regulate pressure limiting usually, but this pressure valve complex structure and pressure limiting limited pressure, can not change according to the real-time demand of user.
Therefore, how to make the pressure limiting pressure continuously adjustabe of the cooking apparatus such as electric pressure cooking saucepan, realizing boiling and reduction of blood pressure in high-speed continuously becomes technical matters urgently to be resolved hurrily.
Utility model content
The utility model is intended at least to solve one of technical matters existed in prior art.
For this reason, an object of the present utility model is, provide a kind of newly can realize the feedback circuit of the solenoid valve of reduction of blood pressure in high-speed by continuous setup pressure.
Another object of the present utility model is, provides a kind of electromagnetic load equipment.
For achieving the above object, the utility model first aspect embodiment provides a kind of feedback circuit of solenoid valve, is applicable to electromagnetic load equipment, comprises: microprocessor, is provided with modulation signal output terminal and feedback signal collection terminal; Supply module, the input end of described supply module is connected to described modulation signal output terminal, the output terminal of described supply module is connected to described electromagnetic load equipment, arrange feedback signal output between described supply module and ground wire, described feedback signal output is connected to described feedback signal collection terminal.
According to the feedback circuit of the solenoid valve of embodiment of the present utility model, the modulation signal output terminal of microprocessor is connected with the input end of supply module, when the voltage that the modulation signal output terminal of microprocessor exports is high voltage, the second power switch conducting in supply module, make the first power switch conducting in supply module, then supply module starts as solenoid valve, supply module is in the process of power supply, the voltage of the output terminal of supply module increases, therefore the acting force between other the magnetic elements in the cooking apparatus such as electromagnetic load equipment and electric pressure cooking saucepan increases, thus the pressure limiting pressure of solenoid valve is changed, owing to arranging feedback signal output between supply module and ground wire, and feedback signal output is connected with the feedback signal collection terminal of microprocessor, therefore according to the feedback signal received, microprocessor can make the pressure limiting pressure continuously adjustabe in the cooking apparatus such as electric pressure cooking saucepan, thus can pressure in the cooking apparatus such as control voltage power pot and the difference between pressure limiting pressure, realize the controlled of the velocity of exhaust of the cooking apparatus such as electric pressure cooking saucepan, the liquid in the cooking apparatus such as electric pressure cooking saucepan is avoided to flow out, and achieve boiling cooking food, make the better to eat delicious food of food mouth that culinary art gimmick is flexible and changeable and cook, in addition, when the voltage that the modulation signal output terminal of microprocessor exports is zero, the second power switch in supply module is closed, the first power switch then in supply module is also closed, thus supply module is stopped as solenoid valve.
In addition, the feedback circuit of the solenoid valve provided according to the utility model above-described embodiment also has following additional technical feature:
According to an embodiment of the present utility model, described supply module comprises: direct supply; Power switch unit, be connected between described direct supply and ground wire, described power switch unit comprises: the first power switch be connected in series and the first diode; Second power switch, between the base stage being connected to described first power switch and described ground wire, the base stage of described second power switch is connected to described modulation signal output terminal; Current potential pull-up unit, be connected between described first power switch collector and ground wire, described current potential pull-up unit comprises the inductance and electrochemical capacitor that are connected in series, described inductance is connected to the collector of described first power switch, described electrochemical capacitor is connected to ground wire, and between described electrochemical capacitor and described inductance, leading-out terminal is as the output terminal of described supply module.
According to the feedback circuit of the solenoid valve of embodiment of the present utility model, because the second power switch in supply module is connected with ground wire, therefore when the voltage exported when the modulation signal output terminal of microprocessor is high voltage, second power switch conducting, thus make the first power switch conducting in supply module, the electromotive force of the inductance then in current potential pull-up unit and electrochemical capacitor increases, thus the voltage of the output terminal of supply module is increased, be solenoid valve for supply module, wherein, first diode is connected with the first power switch, first diode is used for controlling by the first diode, in inductance in current potential pull-up unit and the circuit that forms between electrochemical capacitor three, the flow direction of electric current is one-way, thus ensure the steady growth of supply module voltage that it exports when conducting.
According to an embodiment of the present utility model, described supply module also comprises: rectification filtering module, and be connected in parallel to described first diode, described rectification filtering module comprises the first electric capacity.
According to the feedback circuit of the solenoid valve of embodiment of the present utility model, supply module also comprises: rectification filtering module, for the alternating component in filtering supply module, the voltage that supply module is exported is more stable, thus makes the serviceability of the feedback circuit of solenoid valve more stable.
According to an embodiment of the present utility model, described second power switch is NPN type triode, and described first power switch is PNP type triode, and the collector of described second power switch is connected to the base stage of described first power switch.
According to the feedback circuit of the solenoid valve of embodiment of the present utility model, second power switch is NPN type triode, and the first power switch is PNP type triode, therefore, after the base stage input forward voltage to the second power switch, because the emitter of the second power switch is connected with ground wire, then the second power switch conducting, again because the collector of the second power switch is connected with the base stage of the first power switch, the emitter of the first power switch is connected with direct supply, therefore, after the second conducting power, the electromotive force of the base stage of the first power switch reduces, make the first power switch conducting, thus the output voltage of supply module is increased, for being solenoid valve.
According to an embodiment of the present utility model, the collector of described first power switch is connected to described direct supply, and the collector of described first power switch is connected to the negative electrode of described first diode, and the anode of described first diode is connected to ground wire.
According to the feedback circuit of the solenoid valve of embodiment of the present utility model, the negative electrode of the first diode connects the collector of the first power switch, and the anode of the first diode connects ground wire, for ensureing that the flow direction of electric current in the circuit be made up of the inductance in the first diode, pull-up unit and electrochemical capacitor three is positive dirction, thus achieve the stability of output voltage in supply module.
According to an embodiment of the present utility model, also comprise: the first resistance be connected in series and the second resistance, be connected between the output terminal of described supply module and described ground wire, wherein, between described first resistance and described second resistance, leading-out terminal is as described feedback signal output.
According to an embodiment of the present utility model, described supply module also comprises: the second electric capacity, is connected between described feedback signal output and ground wire.
According to the feedback circuit of the solenoid valve of embodiment of the present utility model, second electric capacity is connected between described feedback signal output and ground wire, when the change in voltage that supply module exports, by charge or discharge, the second electric capacity can ensure that the output terminal of feedback signal also changes simultaneously.
According to an embodiment of the present utility model, also comprise: solenoid, between the output terminal being connected to described supply module and ground wire.
According to the feedback circuit of the solenoid valve of embodiment of the present utility model, solenoid valve comprises solenoid, one end of solenoid is connected with the output terminal of supply module, its other end is connected with ground wire, when supply module starts to power, thus make solenoid and acting force between magnetic pressure limiting valve increase, and then change the pressure limiting pressure of magnetic pressure limiting valve.
According to an embodiment of the present utility model, also comprise: the second diode, the negative electrode of described second diode is connected to the output terminal of described supply module, and the anode of described second diode is connected to ground wire.
According to the feedback circuit of the solenoid valve of embodiment of the present utility model, the negative electrode of the second diode connects the output terminal of supply module, and the anode of the second diode connects ground wire, second diode is for ensureing that the flow direction of electric current in the loop be made up of the second diode and electromagnetic load equipment is one-way, i.e. clockwise direction, thus ensure to repel each other between other the magnetic equipment in the cooking apparatus such as solenoid valve and electric pressure cooking saucepan, in addition, second diode is also for when the voltage that supply module exports reduces, because the second diode has power consumption, second diode can consume the electric energy of electromagnetic load device storage.
Provide a kind of electromagnetic load equipment according to the utility model second aspect embodiment, comprise the feedback circuit of the solenoid valve according to any one of above embodiment.
Additional aspect of the present utility model and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present utility model.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present utility model and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the outside drawing of the electromagnetic load equipment in correlation technique;
Fig. 2 is the structural representation of the solenoid valve in correlation technique;
Fig. 3 is the schematic diagram of the control circuit of solenoid valve in correlation technique;
Fig. 4 is the circuit diagram of the feedback circuit of solenoid valve according to another embodiment of the present utility model.
Embodiment
In order to more clearly understand above-mentioned purpose of the present utility model, feature and advantage, below in conjunction with the drawings and specific embodiments, the utility model is further described in detail.It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.
Set forth a lot of detail in the following description so that fully understand the utility model; but; the utility model can also adopt other to be different from mode described here to implement, and therefore, protection domain of the present utility model is not by the restriction of following public specific embodiment.
As shown in Figure 4, the embodiment of first aspect of the present utility model provides a kind of feedback circuit of solenoid valve 1, is applicable to electromagnetic load equipment, comprises: microprocessor, is provided with modulation signal output terminal and feedback signal collection terminal; Supply module, the input end of described supply module is connected to described modulation signal output terminal, the output terminal of described supply module is connected to described electromagnetic load equipment, arrange feedback signal output 2 between described supply module and ground wire, described feedback signal output 2 is connected to described feedback signal collection terminal.
According to the feedback circuit of the solenoid valve 1 of embodiment of the present utility model, the modulation signal output terminal of microprocessor is connected with the input end of supply module, when the voltage that the modulation signal output terminal of microprocessor exports is high voltage, the second power switch 6 conducting in supply module, make the first power switch 4 conducting in supply module, then supply module starts as solenoid valve 1 is powered, supply module is in the process of power supply, the voltage of the output terminal of supply module increases, therefore the acting force between other the magnetic elements in the cooking apparatus such as electromagnetic load equipment and electric pressure cooking saucepan increases, thus the pressure limiting pressure of solenoid valve 1 is changed, owing to arranging feedback signal output 2 between supply module and ground wire, and feedback signal output 2 is connected with the feedback signal collection terminal of microprocessor, therefore according to the feedback signal received, microprocessor can make the pressure limiting pressure continuously adjustabe in the cooking apparatus such as electric pressure cooking saucepan, thus can pressure in the cooking apparatus such as control voltage power pot and the difference between pressure limiting pressure, realize the controlled of the velocity of exhaust of the cooking apparatus such as electric pressure cooking saucepan, the liquid in the cooking apparatus such as electric pressure cooking saucepan is avoided to flow out, and achieve boiling cooking food, make the flexible and changeable and better to eat delicious food of food that is that cook of culinary art gimmick, in addition, when the voltage that the modulation signal output terminal of microprocessor exports is zero, the second power switch 6 in supply module is closed, the first power switch 4 then in supply module is also closed, thus make supply module stop powering for solenoid valve 1.
In addition, the feedback circuit of the solenoid valve 1 provided according to the utility model above-described embodiment also has following additional technical feature:
According to an embodiment of the present utility model, described supply module comprises: direct supply 3; Power switch unit, be connected between described direct supply 3 and ground wire, described power switch unit comprises: the first power switch 4 and the first diode 5 be connected in series; Second power switch 6, between the base stage being connected to described first power switch 4 and described ground wire, the base stage of described second power switch 6 is connected to described modulation signal output terminal; Current potential pull-up unit, be connected between described first power switch 4 collector and ground wire, described current potential pull-up unit comprises the inductance 7 and electrochemical capacitor 8 that are connected in series, described inductance 7 is connected to the collector of described first power switch 4, described electrochemical capacitor 8 is connected to ground wire, and between described electrochemical capacitor 8 and described inductance 7, leading-out terminal is as the output terminal of described supply module.
According to the feedback circuit of the solenoid valve 1 of embodiment of the present utility model, because the second power switch 6 in supply module is connected with ground wire, therefore when the voltage exported when the modulation signal output terminal of microprocessor is high voltage, second power switch 6 conducting, thus make the first power switch 4 conducting in supply module, the electromotive force of the inductance 7 then in current potential pull-up unit and electrochemical capacitor 8 increases, thus the voltage of the output terminal of supply module is increased, be that solenoid valve 1 is powered for supply module, wherein, first diode 5 is connected with the first power switch 4, first diode 5 is for controlling by the first diode 5, in inductance 7 in current potential pull-up unit and the circuit that forms between electrochemical capacitor 8 three, the flow direction of electric current is one-way, thus ensure the steady growth of supply module voltage that it exports when conducting.
According to an embodiment of the present utility model, described supply module also comprises: rectification filtering module, and be connected in parallel to described first diode 5, described rectification filtering module comprises the first electric capacity 9.
According to the feedback circuit of the solenoid valve 1 of embodiment of the present utility model, supply module also comprises: rectification filtering module, for the alternating component in filtering supply module, the voltage that supply module is exported is more stable, thus makes the serviceability of the feedback circuit of solenoid valve 1 more stable.
According to an embodiment of the present utility model, described second power switch 6 is NPN type triode, and described first power switch 4 is PNP type triode, and the collector of described second power switch 6 is connected to the base stage of described first power switch 4.
According to the feedback circuit of the solenoid valve 1 of embodiment of the present utility model, second power switch 6 is NPN type triode, and the first power switch 4 is PNP type triode, therefore, after the base stage input forward voltage to the second power switch 6, because the emitter of the second power switch 6 is connected with ground wire, then the second power switch 6 conducting, again because the collector of the second power switch 6 is connected with the base stage of the first power switch 4, the emitter of the first power switch 4 is connected with direct supply 3, therefore, after the second conducting power, the electromotive force of the base stage of the first power switch 4 reduces, make the first power switch 4 conducting, thus the output voltage of supply module is increased, power for for solenoid valve 1.
According to an embodiment of the present utility model, the collector of described first power switch 4 is connected to described direct supply 3, and the collector of described first power switch 4 is connected to the negative electrode of described first diode 5, and the anode of described first diode 5 is connected to ground wire.
According to the feedback circuit of the solenoid valve 1 of embodiment of the present utility model, the negative electrode of the first diode 5 connects the collector of the first power switch 4, and the anode of the first diode 5 connects ground wire, for ensureing that the flow direction of electric current in the circuit be made up of the inductance 7 in the first diode 5, pull-up unit and electrochemical capacitor 8 three is positive dirction, thus achieve the stability of output voltage in supply module.
According to an embodiment of the present utility model, also comprise: the first resistance 10 and the second resistance 11 be connected in series, be connected between the output terminal of described supply module and described ground wire, wherein, between described first resistance 10 and described second resistance 11 leading-out terminal as described feedback signal output 2.
According to an embodiment of the present utility model, described supply module also comprises: the second electric capacity 12, is connected between described feedback signal output 2 and ground wire.
According to the feedback circuit of the solenoid valve 1 of embodiment of the present utility model, second electric capacity 12 is connected between described feedback signal output 2 and ground wire, when the change in voltage that supply module exports, by charge or discharge, the second electric capacity 12 can ensure that the output terminal of feedback signal also changes simultaneously.
According to an embodiment of the present utility model, also comprise: solenoid 13, between the output terminal being connected to described supply module and ground wire.
According to the feedback circuit of the solenoid valve 1 of embodiment of the present utility model, solenoid valve 1 comprises solenoid 13, one end of solenoid 13 is connected with the output terminal of supply module, its other end is connected with ground wire, when supply module starts to power, thus make solenoid 13 and acting force between magnetic pressure limiting valve increase, and then change the pressure limiting pressure of magnetic pressure limiting valve.
According to an embodiment of the present utility model, also comprise: the second diode 14, the negative electrode of described second diode 14 is connected to the output terminal of described supply module, and the anode of described second diode 14 is connected to ground wire.
According to the feedback circuit of the solenoid valve 1 of embodiment of the present utility model, the negative electrode of the second diode 14 connects the output terminal of supply module, and the anode of the second diode 14 connects ground wire, second diode 14 is for ensureing that the flow direction of electric current in the loop be made up of the second diode 14 and electromagnetic load equipment is one-way, i.e. clockwise direction, thus ensure to repel each other between other the magnetic equipment in the cooking apparatus such as solenoid valve 1 and electric pressure cooking saucepan, in addition, second diode 14 is also for when the voltage that supply module exports reduces, because the second diode 14 has power consumption, second diode 14 can consume the electric energy of electromagnetic load device storage.
Provide a kind of electromagnetic load equipment according to the utility model second aspect embodiment, comprise the feedback circuit of the solenoid valve 1 according to any one of above embodiment.
In the description of this instructions, term " first ", " second " and " the 3rd " object only for describing, and instruction or hint relative importance can not be interpreted as, unless otherwise clearly defined and limited; Term " connection ", " installation ", " fixing " etc. all should be interpreted broadly, and such as, " connection " can be fixedly connected with, and also can be removably connect, or connects integratedly; Can be directly be connected, also indirectly can be connected by intermediary.For the ordinary skill in the art, the concrete meaning of above-mentioned term in the utility model can be understood as the case may be.
In the description of this instructions, specific features, structure, material or feature that the description of term " embodiment ", " some embodiments ", " specific embodiment " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (10)
1. a feedback circuit for solenoid valve, is applicable to electromagnetic load equipment, it is characterized in that, comprising:
Microprocessor, is provided with modulation signal output terminal and feedback signal collection terminal;
Supply module, the input end of described supply module is connected to described modulation signal output terminal, the output terminal of described supply module is connected to described electromagnetic load equipment, arrange feedback signal output between described supply module and ground wire, described feedback signal output is connected to described feedback signal collection terminal.
2. the feedback circuit of solenoid valve according to claim 1, is characterized in that, described supply module comprises:
Direct supply;
Power switch unit, be connected between described direct supply and ground wire, described power switch unit comprises:
The first power switch be connected in series and the first diode;
Second power switch, between the base stage being connected to described first power switch and described ground wire,
The base stage of described second power switch is connected to described modulation signal output terminal;
Current potential pull-up unit, be connected between described first power switch collector and ground wire, described current potential pull-up unit comprises the inductance and electrochemical capacitor that are connected in series, described inductance is connected to the collector of described first power switch, described electrochemical capacitor is connected to ground wire, and between described electrochemical capacitor and described inductance, leading-out terminal is as the output terminal of described supply module.
3. the feedback circuit of solenoid valve according to claim 2, is characterized in that, described supply module also comprises:
Rectification filtering module, be connected in parallel to described first diode, described rectification filtering module comprises the first electric capacity.
4. the feedback circuit of solenoid valve according to claim 2, it is characterized in that, described second power switch is NPN type triode, and described first power switch is PNP type triode, and the collector of described second power switch is connected to the base stage of described first power switch.
5. the feedback circuit of solenoid valve according to claim 2, it is characterized in that, the collector of described first power switch is connected to described direct supply, and the collector of described first power switch is connected to the negative electrode of described first diode, and the anode of described first diode is connected to ground wire.
6. the feedback circuit of the solenoid valve according to any one of claim 1 to 5, is characterized in that, also comprises:
The first resistance be connected in series and the second resistance, be connected between the output terminal of described supply module and described ground wire,
Wherein, between described first resistance and described second resistance leading-out terminal as described feedback signal output.
7. the feedback circuit of the solenoid valve according to any one of claim 1 to 5, is characterized in that, described supply module also comprises:
Second electric capacity, is connected between described feedback signal output and ground wire.
8. the feedback circuit of the solenoid valve according to any one of claim 1 to 5, is characterized in that, also comprises:
Solenoid, between the output terminal being connected to described supply module and ground wire.
9. the feedback circuit of the solenoid valve according to any one of claim 1 to 5, is characterized in that, also comprises:
Second diode, the negative electrode of described second diode is connected to the output terminal of described supply module, and the anode of described second diode is connected to ground wire.
10. an electromagnetic load equipment, is characterized in that, comprising: the feedback circuit of solenoid valve as claimed in any one of claims 1-9 wherein.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520073506.5U CN204406256U (en) | 2015-02-02 | 2015-02-02 | The feedback circuit of solenoid valve and electromagnetic load equipment |
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| CN201520073506.5U CN204406256U (en) | 2015-02-02 | 2015-02-02 | The feedback circuit of solenoid valve and electromagnetic load equipment |
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| CN204406256U true CN204406256U (en) | 2015-06-17 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107810423A (en) * | 2015-07-02 | 2018-03-16 | 克诺尔商用车制动系统有限公司 | For monitoring the circuit arrangement of fly-wheel diode |
| CN108626466A (en) * | 2017-03-20 | 2018-10-09 | 佛山市顺德区美的电热电器制造有限公司 | Driving circuit, electromagnetic exhaust valve, method for exhausting and cooking apparatus |
| CN108736870A (en) * | 2017-04-20 | 2018-11-02 | 佛山市顺德区美的电热电器制造有限公司 | Drive control method, drive dynamic control device and cooking apparatus |
| CN113794471A (en) * | 2021-09-10 | 2021-12-14 | 厦门科牧智能技术有限公司 | Circuit and method for delaying key corrosion and control handle |
-
2015
- 2015-02-02 CN CN201520073506.5U patent/CN204406256U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107810423A (en) * | 2015-07-02 | 2018-03-16 | 克诺尔商用车制动系统有限公司 | For monitoring the circuit arrangement of fly-wheel diode |
| CN108626466A (en) * | 2017-03-20 | 2018-10-09 | 佛山市顺德区美的电热电器制造有限公司 | Driving circuit, electromagnetic exhaust valve, method for exhausting and cooking apparatus |
| CN108736870A (en) * | 2017-04-20 | 2018-11-02 | 佛山市顺德区美的电热电器制造有限公司 | Drive control method, drive dynamic control device and cooking apparatus |
| CN113794471A (en) * | 2021-09-10 | 2021-12-14 | 厦门科牧智能技术有限公司 | Circuit and method for delaying key corrosion and control handle |
| CN113794471B (en) * | 2021-09-10 | 2023-06-20 | 厦门科牧智能技术有限公司 | Circuit and method for delaying key corrosion and control handle |
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