CN205092650U - On-off detection circuit and pressure cooker - Google Patents
On-off detection circuit and pressure cooker Download PDFInfo
- Publication number
- CN205092650U CN205092650U CN201520850691.4U CN201520850691U CN205092650U CN 205092650 U CN205092650 U CN 205092650U CN 201520850691 U CN201520850691 U CN 201520850691U CN 205092650 U CN205092650 U CN 205092650U
- Authority
- CN
- China
- Prior art keywords
- circuit
- hall switch
- power supply
- switch circuit
- pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 58
- 239000003990 capacitor Substances 0.000 claims description 26
- 230000006698 induction Effects 0.000 claims description 5
- 230000000977 initiatory effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 description 8
- 238000007599 discharging Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 235000014676 Phragmites communis Nutrition 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model discloses an on-off detection circuitry and pressure cooker. Wherein, this break-make detection circuitry includes: the Hall switch circuit comprises an output pin, a power supply anode pin and a power supply cathode pin, wherein the power supply anode pin and the output pin are connected to the same interface of the micro-control circuit by using the same output interface; the standby power supply circuit is connected to two ends of the power supply positive pin and the power supply negative pin in parallel; the one-way conduction circuit is connected in series between the micro control circuit and the nodes of the power supply positive pin and the standby power supply circuit and is used for enabling current to flow from the direction of the micro control circuit to the direction of the Hall switch circuit; and the micro control circuit is used for supplying power to the Hall switch circuit and charging the standby power supply circuit when the micro control circuit is in an output mode, and stopping supplying power to the Hall switch circuit after the charging time is up. The utility model provides an among the prior art hall switch's power supply system's circuit complicated, lead to the technical problem that power supply system is with high costs.
Description
Technical Field
The utility model relates to a circuit field particularly, relates to an break-make detection circuitry and pressure cooker.
Background
At present, in the prior art, mechanical micro switches or reed switches are mostly adopted in the fields of cover opening and closing detection, upward pressure detection and the like of a pressure cooker; the mechanical micro-motion switch is large in size, not easy to assemble and easy to be affected by air humidity, and the contact is easy to oxidize after the mechanical micro-motion switch is used for a long time, so that the detection effect of the mechanical micro-motion switch is lost; and the reed switch is packaged by glass, so that the reed switch is difficult to process and assemble, and has lower sensitivity and higher cost.
Because the hall switch encapsulation is small, and is high to magnetic field induction sensitivity, two kinds of above-mentioned schemes of substitution that can be fine, but the hall switch has positive terminal power supply port, negative terminal ground connection port and signal output port, and above-mentioned three ports all need the wiring just can make hall switch normal work to lead to the hall switch circuit comparatively complicated.
Aiming at the technical problem that the power supply system of the Hall switch in the prior art is high in cost due to the complex circuit, an effective solution is not provided at present.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides an on-off detection circuitry and pressure cooker to solve among the prior art Hall switch's power supply system's circuit complicacy at least, lead to the technical problem that power supply system is with high costs.
According to the utility model discloses an aspect of the embodiment provides an on-off detection circuit, include: the Hall switch circuit comprises an output pin, a power supply anode pin and a power supply cathode pin, wherein the power supply anode pin and the output pin are connected to the same interface of the micro-control circuit by using the same output interface; the standby power supply circuit is connected to two ends of the power supply positive pin and the power supply negative pin in parallel; the one-way conduction circuit is connected in series between the micro control circuit and the nodes of the power supply positive pin and the standby power supply circuit and is used for enabling current to flow from the direction of the micro control circuit to the direction of the Hall switch circuit; and the micro control circuit is used for supplying power to the Hall switch circuit and charging the standby power supply circuit when the micro control circuit is in an output mode, and stopping supplying power to the Hall switch circuit after the charging time is up.
According to the utility model discloses on the other hand of the embodiment, still provide a pressure cooker, include: the on-off detection circuit of the pressure cooker.
In the embodiment of the present invention, a standby power supply circuit is added to the positive pin and the negative pin of the power supply, so as to supply power from the standby power supply circuit when the micro control circuit is in an input mode, and a single-phase conduction circuit is added between the micro control circuit and the positive pin of the power supply, so as to ensure the current flow direction, thereby achieving the purpose of protecting the on-off detection circuit, and realizing the technical effects of supplying power to the hall switch circuit and charging the standby power supply circuit when the micro control circuit is in an output state, and supplying power to the hall switch circuit by the standby power supply circuit when the micro control circuit is in an input state, so that the output pin and the positive pin of the power supply of the on-off detection circuit of the present invention are both connected with the micro control circuit, and the negative pin of the power supply is grounded, that the on-off detection circuit of the present invention can complete the technical effects of supplying power and detecting the on-, and then the technical problem that the power supply system of the Hall switch in the prior art is high in cost due to the fact that the circuit of the power supply system is complex is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:
fig. 1 is a block diagram of an on/off detection circuit according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of an alternative on-off detection circuit according to the present invention; and
fig. 3 is a schematic circuit diagram of another alternative on-off detection circuit according to the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In accordance with an embodiment of the present invention, there is provided an embodiment of an on/off detection circuit, it should be noted that the steps illustrated in the flowchart of the drawings may be performed in a computer system such as a set of computer executable instructions, and that while a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than here.
Fig. 1 is a structural diagram of an on-off detection circuit according to an embodiment of the present invention, as shown in fig. 1, the on-off detection circuit includes: the circuit comprises a Hall switch circuit 10, a standby power supply circuit 30, a unidirectional conducting circuit 50 and a micro-control circuit 70. Wherein,
the Hall switch circuit 10 comprises an output pin, a power supply anode pin and a power supply cathode pin, wherein the power supply anode pin and the output pin are connected to the same interface of the micro control circuit by using the same output interface.
And the standby power supply circuit 30 is connected to two ends of the power supply positive electrode pin and the power supply negative electrode pin in parallel.
Specifically, the standby power supply circuit is connected in parallel at two ends of a power supply positive electrode pin and a power supply negative electrode pin and is used for supplying power to the Hall switch circuit when the micro-control circuit does not supply power to the Hall switch circuit; the standby power supply circuit can comprise a charge-discharge capacitor, and when the micro-control circuit supplies power to the Hall switch circuit, the charge-discharge capacitor of the standby power supply circuit is charged; the standby power supply circuit can also be a battery which can continuously supply power for the Hall switch circuit.
And the anode of the unidirectional conduction circuit is connected with the output pin and is connected into the micro control circuit, and the cathode of the unidirectional conduction circuit is connected into the anode pin of the power supply, so that the current from the micro control circuit flows to the direction of the Hall switch circuit.
Specifically, the one-way conduction circuit can be a diode, the diode can be connected between a power supply positive electrode pin and a port of the micro control circuit, the conduction direction is from the micro control circuit to the standby power supply, and the on-off detection circuit adopts the one-way conduction characteristic of the diode, so that when the charging and discharging capacitor discharges to supply power to the Hall switch circuit, current only flows to the Hall switch circuit.
And the micro-control circuit 70 is used for supplying power to the Hall switch circuit and charging the standby power supply circuit when the output mode is in the output mode, and stopping supplying power to the Hall switch circuit after the charging time is up.
Specifically, the micro control circuit can output high level in an output state to supply power for the Hall switch circuit and supply power for the standby power supply circuit, and when the charging time is up, the standby power supply circuit supplies power for the Hall switch circuit; it should be noted that the charging time may be set by a preset program of the micro-control circuit, and may be a time for saturating the electric quantity of the charging and discharging capacitor in the standby power supply circuit, or other times according to actual control requirements.
The on-off detection circuit adopts a mode that the positive power pin and the output pin of the Hall switch circuit are connected to the same end of the micro control circuit, and the technical effects that the micro control circuit supplies power to the Hall switch circuit and can detect the on-off state of the Hall switch circuit can be realized through the conversion of the input and output states of the port of the micro control circuit, so that the technical problems that the power supply system of the Hall switch in the prior art is complex in circuit and high in cost of the power supply system are solved.
Optionally, as shown in fig. 2, according to the above on-off detection circuit, the standby power supply circuit includes: and charging and discharging the capacitor C.
And one end of the charge-discharge capacitor is connected to the positive power pin of the Hall switch circuit, the other end of the charge-discharge capacitor is connected to the negative power pin of the Hall switch circuit, and the charge-discharge capacitor is used for charging the charge-discharge capacitor in the micro control circuit and supplying power to the Hall switch circuit after the charging time is up.
Specifically, the charge-discharge capacitor is connected in parallel between a power supply positive electrode pin and a power supply negative electrode pin of the Hall switch circuit, when the micro-control circuit supplies power to the Hall switch circuit, the charge-discharge capacitor is charged at the same time, and after the charge time is reached, the charge-discharge capacitor discharges power to supply power to the Hall switch circuit; the electric quantity of the capacitor to be charged and discharged can be calculated according to the time when the port of the micro control circuit is in the input mode state and the electric consumption of the hall switching circuit in the event, for example, the port of the micro control circuit is controlled to be in the input state for 2ms by a preset program, and the electric quantity of the capacitor to be charged and discharged can be the electric consumption of the hall switching circuit in 2 ms.
The on-off detection circuit adopts the charge-discharge capacitor as the energy storage element of the standby power supply circuit, so that the charge-discharge capacitor is charged when the micro-control circuit supplies power to the Hall switch circuit, the micro-control circuit discharges power to the Hall switch when stopping supplying power to the charge-discharge capacitor, the micro-control circuit detects the on-off state of the Hall switch circuit when supplying power to the Hall switch circuit, and the on-off state of the Hall switch circuit can be detected for the input state by switching the port after the micro-control circuit supplies power to the Hall switch circuit for a period of time.
Optionally, as shown in fig. 3, according to the on-off detection circuit, the standby power supply circuit may further include: a battery source V.
And the positive electrode of the battery power supply is connected to the positive power supply pin of the Hall switch circuit, and the negative electrode of the battery power supply is connected to the negative power supply pin of the Hall switch circuit and used for supplying power to the Hall switch circuit.
The positive pole of the battery power supply is connected to the positive pole pin of the power supply of the Hall switch circuit, and the negative pole of the battery power supply is connected to the negative pole pin of the power supply of the Hall switch circuit and used for supplying power to the Hall switch circuit.
Specifically, as shown in fig. 3, when the standby power supply circuit is a battery, the battery can continuously supply power to the hall switch circuit, and the port of the micro control circuit is only connected to the positive pin of the power supply of the hall switch circuit, that is, only the on-off state of the hall switch circuit is detected; wherein, the electric quantity of battery power can last for hall switch power supply.
Optionally, as shown in fig. 2, according to the above on-off detection circuit, the on-off detection circuit further includes:
and the resistor R is connected between the output pin of the Hall switch circuit and the micro control circuit and used for protecting the Hall switch circuit when the current is overlarge.
The output pin of the Hall switch circuit is connected with the same interface of the micro control circuit, when the micro control circuit supplies power to the Hall switch circuit, a high level is output, the output pin of the Hall switch circuit is connected with the resistor, the Hall switch circuit can be prevented from being burnt, wherein the resistor with a large resistance value can be selected, so that the current flowing to the output pin of the Hall switch circuit is extremely small and can be ignored.
The on-off detection circuit adopts a mode of adding the diode D in the circuit to ensure the flow direction of current in the circuit, adopts a mode of connecting the resistor at the output pin of the Hall switch circuit to protect the Hall switch circuit from overlarge current, and realizes the reliability and the practicability of the on-off detection circuit.
Optionally, in the above on-off detection circuit, when the micro control circuit is in the input mode under the condition that the standby power supply circuit is switched to supply power to the hall switch circuit, the micro control circuit starts to detect the conduction state of the hall switch circuit.
Specifically, when little control circuit charges to reserve power supply circuit and arrives after the preset time, switches to the mode of being supplied power to hall switch circuit by reserve power supply circuit, and when reserve power supply circuit supplied power to hall switch circuit, little control circuit and hall switch circuit connection's port convert the input mode into, acquire the output level of hall switch circuit output pin to judge hall switch circuit's the on-state according to the output level.
The Hall switch circuit adopts a mode of port conversion mode that the micro control circuit is connected with the Hall switch circuit when the standby power supply supplies power to the Hall switch circuit, and the technical effect of detecting the conduction state of the Hall switch circuit by using the micro control circuit is achieved.
Optionally, in the on-off detection circuit, if it is detected that the output pin of the hall switch circuit outputs a high level, the hall switch circuit is in a non-conducting state, and the hall switch circuit is located outside the magnetic induction area; and if the output pin of the Hall switch circuit outputs a low level, the Hall switch circuit is in a conducting state, and the Hall switch circuit is arranged in the magnetic induction area.
Specifically, according to the characteristics of the hall switch, when the hall switch is arranged outside the magnetic field region, the hall switch cannot be conducted to output a high level, and when the hall switch is arranged in the magnetic field region, the hall switch is conducted to output a low level; therefore, the micro-control circuit can judge whether the Hall switch circuit is in the magnetic field region according to the detected level output by the Hall switch output pin.
The on-off detection circuit adopts the sensitivity of the Hall switch to the magnetic field area, and realizes the technical effect of judging whether the Hall switch is arranged in the magnetic field area according to the level output by the Hall switch circuit.
Optionally, in the above on-off detection circuit, after the micro control circuit is controlled to be in the output mode for a predetermined time, the micro control circuit is controlled to be switched to the input mode, and the on state of the hall switch circuit is detected.
The on-off detection circuit switches the input and output modes through the port of the micro control circuit connected with the Hall switch circuit, so that the micro control circuit is used for supplying power to the Hall switch circuit and detecting the on-off state of the Hall switch circuit, the technical effect that the power supply positive pin of the Hall switch circuit does not need to be additionally connected with a power supply is achieved, and the Hall switch circuit can work only by two outgoing lines.
Optionally, as shown in fig. 2, in the on-off detection circuit, the unidirectional conducting circuit is a diode D.
In the above on-off detection circuit, the positive pole of the diode is connected with the micro control circuit, the negative pole is connected with the charge-discharge capacitor and is connected with the positive pin of the Hall switch circuit, when the micro control circuit is in an input mode, the capacitor of the standby power supply circuit discharges, and due to the one-way conductivity of the diode, the discharged electric quantity of the charge-discharge capacitor cannot flow to the micro control circuit from the charge-discharge capacitor and only flows to the positive pin of the Hall switch circuit, and the diode has a fixed voltage drop.
According to the above, the utility model provides an on-off detection circuitry is through establishing ties the diode between microcontroller's anodal pin and microcontroller for the electric current that comes from microcontroller and come from charge-discharge capacitance can only flow to hall switch circuit, has played protection circuit safety, and ensures that microcontroller and reserve supply circuit's electric current flow equalizes to hall switch circuit's technological effect, thereby makes hall switch circuit can last detection circuitry's break-make.
Example 2
The utility model also provides a pressure cooker, this pressure cooker includes arbitrary break-make detection circuitry in above-mentioned embodiment 1.
The above embodiment numbers of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.
It should be noted here that, the pressure cooker may adopt the on-off detection circuit in the above embodiment 1 to detect the opening and closing of the cover of the pressure cooker, when the on-off detection circuit in the embodiment 1 detects the opening and closing of the cover of the pressure cooker, one of two wires led out from the hall switch may be connected to the micro control circuit, and the other wire is grounded, wherein the other end of the line connected to the micro control circuit is simultaneously connected to the positive power pin and the output pin of the hall switch circuit, the port connected to the micro control circuit and the hall switch circuit is subjected to time sequence control by the program preset in the micro control circuit, when the port outputs a high level, the hall switch circuit is powered and the charging and discharging capacitors connected to both ends of the hall switch circuit are charged, the hall switch circuit is started to operate, and after the charging and discharging capacitors are charged, the port of the micro control circuit is switched to the input state according to the preset program, at the moment, the charging and discharging capacitor supplies power to the Hall switch circuit, the Hall switch circuit still continues to work, meanwhile, the micro control circuit with the port converted into the input state detects the output level of the output pin of the Hall switch circuit, if the output level of the output pin of the Hall switch circuit is detected to be high, the Hall switch circuit is determined not to be conducted, and if the output level of the output pin of the Hall switch circuit is detected to be low, the Hall switch circuit is determined to be in the conducting state. After the conducting state of the Hall switch circuit is obtained, the cover opening and closing detection of the pressure cooker can be carried out.
In an optional embodiment, a magnet can be arranged in a handle of the pressure cooker, the on-off detection circuit is arranged at the edge of a cooker body of the pressure cooker, when the pressure cooker is in an uncapped state, the magnet in the handle is far away from the on-off detection circuit, a Hall switch circuit in the on-off detection circuit is arranged outside a magnetic field area, the Hall switch circuit is not conducted, and a high level is output; when the handle of the pressure cooker is closed, the magnet in the handle is close to the on-off detection circuit, the Hall switch circuit in the on-off detection circuit is arranged in the magnetic field area, the Hall switch circuit is in a conducting state and outputs a low level, and the micro control circuit in the on-off detection circuit can determine the opening and closing state of the pressure cooker by detecting the output level of the Hall switch circuit.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. An on-off detection circuit, comprising:
the Hall switch circuit comprises an output pin, a power supply anode pin and a power supply cathode pin, wherein the power supply anode pin and the output pin are connected to the same interface of the micro-control circuit by using the same output interface;
the standby power supply circuit is connected to two ends of the power supply positive pin and the power supply negative pin in parallel;
the positive pole of the unidirectional conduction circuit is connected with the output pin and is connected into the micro-control circuit, and the negative pole of the unidirectional conduction circuit is connected into the positive pole pin of the power supply and is used for enabling the current from the micro-control circuit to flow to the Hall switch circuit;
and the micro control circuit is used for charging the Hall switch circuit and the standby power supply circuit in an output mode and stopping supplying power to the Hall switch circuit after the charging time is up.
2. The on-off detection circuit of claim 1, wherein the backup power supply circuit comprises:
and one end of the charge-discharge capacitor is connected to the positive pin of the power supply of the Hall switch circuit, and the other end of the charge-discharge capacitor is connected to the negative pin of the power supply of the Hall switch circuit and used for supplying power to the Hall switch circuit.
3. The on-off detection circuit of claim 1, wherein the backup power supply circuit comprises:
the positive pole of the battery power supply is connected with the positive pole pin of the power supply of the Hall switch circuit, and the negative pole of the battery power supply is connected with the negative pole pin of the power supply of the Hall switch circuit and used for supplying power for the Hall switch circuit.
4. The on-off detection circuit according to claim 2, further comprising:
and the resistor is connected between the output pin of the Hall switch circuit and the micro control circuit and used for protecting the Hall switch circuit when the current is overlarge.
5. The on-off detection circuit according to any one of claims 1 to 4, wherein when the micro control circuit is in an input mode while switching to the standby power supply circuit to supply power to the Hall switch circuit, the micro control circuit starts detecting a conduction state of the Hall switch circuit.
6. The on-off detection circuit according to claim 5, wherein if it is detected that the output pin of the Hall switch circuit outputs a high level, the Hall switch circuit is in a non-conducting state, and the Hall switch circuit is disposed outside a magnetic induction region; and if the output pin of the Hall switch circuit outputs a low level, the Hall switch circuit is in a conducting state, and the Hall switch circuit is arranged in a magnetic induction area.
7. The on-off detection circuit according to claim 1, wherein after controlling said micro control circuit to be in an output mode for a predetermined time, controlling said micro control circuit to switch to an input mode and initiating detection of the on-state of said hall switch circuit.
8. The on-off detection circuit of claim 1, wherein the unidirectional conducting circuit is a diode.
9. A pressure cooker, comprising: the on-off detection circuit of any of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520850691.4U CN205092650U (en) | 2015-10-29 | 2015-10-29 | On-off detection circuit and pressure cooker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520850691.4U CN205092650U (en) | 2015-10-29 | 2015-10-29 | On-off detection circuit and pressure cooker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205092650U true CN205092650U (en) | 2016-03-16 |
Family
ID=55483302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520850691.4U Active CN205092650U (en) | 2015-10-29 | 2015-10-29 | On-off detection circuit and pressure cooker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205092650U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110501938A (en) * | 2019-08-01 | 2019-11-26 | 深圳市睿耳电子有限公司 | A kind of Hall control circuit |
| CN110596513A (en) * | 2019-09-09 | 2019-12-20 | 广东万家乐燃气具有限公司 | Hall assembly voltage detection device and Hall assembly performance detection device |
-
2015
- 2015-10-29 CN CN201520850691.4U patent/CN205092650U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110501938A (en) * | 2019-08-01 | 2019-11-26 | 深圳市睿耳电子有限公司 | A kind of Hall control circuit |
| CN110596513A (en) * | 2019-09-09 | 2019-12-20 | 广东万家乐燃气具有限公司 | Hall assembly voltage detection device and Hall assembly performance detection device |
| CN110596513B (en) * | 2019-09-09 | 2024-03-15 | 广东万家乐燃气具有限公司 | Hall assembly voltage detection device and Hall assembly performance detection device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101534005B (en) | Suppressing circuit of power-on impact current | |
| CN103370877B (en) | The method of over-current protection device and operation power switch | |
| CN106486978B (en) | Power-down protection apparatus based on magnetic latching relay | |
| CN101908771A (en) | Circuit for realizing fast and slow charging in linear circuits and charging control method | |
| RU2016118319A (en) | Protection of a power supply containing a series of batteries connected in parallel against external short circuit | |
| CN203911743U (en) | Electronic device and capacitor discharge circuit thereof | |
| CN204103446U (en) | A kind of over under-voltage protection circuit | |
| CN106053999A (en) | Power failure detection circuit for wireless single fire wire switch and applications | |
| CN205092650U (en) | On-off detection circuit and pressure cooker | |
| CN202759375U (en) | Circuit topology structure used for controlling power supply starting impact current and extending power supply maintenance time | |
| CN104242252B (en) | Battery over-discharge protection circuit | |
| CN105553245A (en) | Soft start circuit | |
| CN109417290A (en) | Protect circuit and distributor | |
| CN104600763B (en) | Under-voltage protecting circuit and lamps and lanterns | |
| CN204408675U (en) | Illumination control circuit and lighting apparatus | |
| CN102338838A (en) | Creepage detection circuit | |
| CN103364688B (en) | Three-jack socket electric leakage detection circuit | |
| CN106166990A (en) | A kind of startup power circuit | |
| CN201716718U (en) | Single-chip microcomputer detection circuit and device thereof | |
| CN211508897U (en) | Redundant trigger circuit for bypass switch of flexible direct current converter valve | |
| KR20120027151A (en) | Electronic switch control system and electronic switch drive method | |
| CN209525422U (en) | A kind of test circuit | |
| CN209250219U (en) | A kind of under-voltage delay protection device of power supply | |
| CN207691778U (en) | A kind of skin care device | |
| CN109039033B (en) | Power supply conversion device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |