CN208112227U - A kind of electric hair drier control circuit of high reliability - Google Patents
A kind of electric hair drier control circuit of high reliability Download PDFInfo
- Publication number
- CN208112227U CN208112227U CN201820591692.5U CN201820591692U CN208112227U CN 208112227 U CN208112227 U CN 208112227U CN 201820591692 U CN201820591692 U CN 201820591692U CN 208112227 U CN208112227 U CN 208112227U
- Authority
- CN
- China
- Prior art keywords
- switch
- power
- output end
- control circuit
- circuit
- 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
Landscapes
- Cleaning And Drying Hair (AREA)
Abstract
The utility model provides a kind of electric hair drier control circuit of high reliability, including power control circuit, fan motor driving circuit, heater strip driving circuit, regulator rectifier circuit, single-chip microcontroller and infrared inductor.The electric hair drier control circuit of high reliability provided by the utility model, in the case where relay power-off suddenly in use is arranged in power control circuit, the power supply circuit of hair dryer will be disconnected because relay stops working, even if Power resumption later, hair dryer will not start；Meanwhile infrared inductor is set in hair dryer circuit, if hair dryer does not detect that human body signal, hair dryer will automatically power off, so that the Electrical Safety performance of hair dryer is greatly promoted.
Description
Technical field
The utility model relates to electronic technology field, in particular to a kind of electric hair drier control circuit of high reliability.
Background technique
Hair dryer has a wide range of applications in people's lives, still, is also seen repeatly because of electricity consumption in the major campus dormitory in the whole nation
Disaster caused by device improper use, and wherein common reason be exactly when using hair dryer, due to powering off suddenly, user
Member does not close the power supply of hair dryer when leaving, and after being powered, hair dryer automatically turns on again, at this time the interior nothing again of dormitory
People keeps an eye on hair dryer, both wastes electricity, and it is excessively high that hair dryer use for a long time will lead to temperature, influences the hair dryer service life and have to pacify
Full hidden danger, and greatly it is likely to result in fire.
Utility model content
To solve the above-mentioned deficiency mentioned in the prior art, the utility model provides a kind of hair dryer control of high reliability
Circuit, including power control circuit, fan motor driving circuit, heater strip driving circuit, regulator rectifier circuit, single-chip microcontroller and
Infrared inductor；Wherein：
The power control circuit includes the first power input, second source input terminal, the first power output end, second
Power output end, switch S1 and relay K1；The switch S1 is key switch；The switch S1 is connected in series in described
Between one power input and the first power output end；The contact series of the relay K1 are connected to first power input
Between end and the first power output end；Coil one end of the relay K1 is connected to the first DC power supply, the relay K1
The other end of coil be connected to the collector of triode Q1, the emitter of the triode Q1 is connected to ground wire, three pole
The base stage of pipe Q1 is connected to the single-chip microcontroller；The second source input terminal and the second source output end are connected to ground
Line；
The fan motor driving circuit includes switch S2, rectifier bridge BG1 and fan motor M1；The rectifier bridge BG1's
One input terminal is connected to first power output end, another input terminal connection of the rectifier bridge BG1 by switch S2
To the second source output end；Two output ends of the rectifier bridge BG1 are respectively connected to the both ends of the fan motor；
The heater strip driving circuit includes switch S3 and heater strip；One end of the switch S3 is connected by the switch S2
It is connected to first power output end；The other end of the switch S3 is connected to the second source by the heater strip and exports
End；
The regulator rectifier circuit is connected with first power output end and second source output end, and the rectification is steady
Volt circuit is relay K1 power supply for exporting the first DC power supply and the second DC power supply, first DC power supply；
Second DC power supply is single-chip microcontroller power supply；
The output end of the infrared inductor is connected to the single-chip microcontroller.
Further, the switch S2 is single-pole three-throw switch；Wherein, the movable contact O of the switch S2 is connected to described
First power output end；The first stationary contact A of the switch S2 is connected to the rectifier bridge BG1, and the second of the switch S2 is quiet
Contact B is connected to the first stationary contact A by diode D1；The third stationary contact C of the switch S2 is hanging.
Further, the second stationary contact B of the switch S2 connects the anode of the diode D1
Further, the rectifier bridge BG1 is full-wave rectification bridge.
Further, the triode Q1 is NPN type triode.
The electric hair drier control circuit of high reliability provided by the utility model, by the way that relay is arranged in power control circuit
Device, in use suddenly in the case where power-off, the power supply circuit of hair dryer will be disconnected because relay stops working, even if later
Power resumption, hair dryer will not start；Meanwhile infrared inductor is set in hair dryer circuit, if hair dryer does not have
Detect that human body signal, hair dryer will automatically power off, so that the Electrical Safety performance of hair dryer is greatly promoted.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is
Some embodiments of the utility model, for those of ordinary skill in the art, in the premise of not making the creative labor property
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the partial circuit schematic diagram of the electric hair drier control circuit of high reliability provided by the utility model；
Fig. 2 is the partial circuit schematic diagram of the electric hair drier control circuit of high reliability provided by the utility model；
Fig. 3 is the partial circuit schematic diagram of the electric hair drier control circuit of high reliability provided by the utility model；
Fig. 4 is the circuit diagram of another embodiment provided by the utility model.
Appended drawing reference：
10 power control circuit, 11 first power input, 12 first power output end
13 second source input terminal, 14 second source output end, 20 fan motor driving circuit
30 heater strip driving circuit, 31 heater strip, 40 regulator rectifier circuit
41 first 42 second DC power supply of DC power supply, 50 single-chip microcontroller
60 infrared inductors
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model
Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to
The range of the utility model protection.
" first ", " second " used in the utility model embodiment and similar word be not offered as any sequence,
Quantity or importance, and be only intended to distinguish different component parts.The similar word such as " one end ", " other end ", simply means to
The orientation or positional relationship of showing device or element is is based on the orientation or positional relationship shown in the drawings, rather than indication or suggestion institute
The device or element of finger must have a particular orientation, be constructed and operated in a specific orientation.The classes such as " comprising " or "comprising"
Like word mean the element before the word or object out cover appear in the word presented hereinafter element or object and its
It is equivalent, and it is not excluded for other elements or object." connection " either the similar word such as " connected " is not limited to physics or machine
The connection of tool, but may include electrical connection, it is either direct or indirect.
FIG. 1 to FIG. 3 is that a kind of circuit of electric hair drier control circuit of high reliability provided by the embodiment of the utility model is former
Reason figure；As shown in FIG. 1 to 3, the electric hair drier control circuit of high reliability provided by the embodiment of the utility model includes power supply control
Circuit 10 processed, fan motor driving circuit 20, heater strip driving circuit 30, regulator rectifier circuit 40, single-chip microcontroller 50 and infrared
Inductor 60；Wherein：
The power control circuit 10 includes the first power input 11, second source input terminal 13, the output of the first power supply
End 12, second source output end 14, switch S1 and relay K1；The switch S1 is key switch；The switch S1 series connection
It is connected between first power input 11 and the first power output end 12；The contact series of the relay K1 are connected to
Between first power input 11 and the first power output end 12；It is straight that coil one end of the relay K1 is connected to first
Galvanic electricity source 41, the other end of the coil of the relay K1 are connected to the collector of triode Q1, the transmitting of the triode Q1
Pole is connected to ground wire, and the base stage of the triode Q1 is connected to the single-chip microcontroller 50；The second source input terminal 13 and described
Second source output end 14 is connected to ground wire；
The fan motor driving circuit 20 includes switch S2, rectifier bridge BG1 and fan motor M1；The rectifier bridge BG1
An input terminal first power output end 12, another input terminal of the rectifier bridge BG1 are connected to by switch S2
It is connected to the second source output end 14；Two output ends of the rectifier bridge BG1 are respectively connected to the fan motor
Both ends；
The heater strip driving circuit 30 includes switch S3 and heater strip 31；One end of the switch S3 passes through the switch
S2 is connected to first power output end 12；The other end of the switch S3 is connected to described second by the heater strip 31
Power output end 14；
The regulator rectifier circuit 40 is connected with first power output end 12 and second source output end 14, described
For regulator rectifier circuit 40 for exporting the first DC power supply 41 and the second DC power supply 42, first DC power supply 41 is described
Relay K1 power supply；Second DC power supply 42 is the single-chip microcontroller 50 power supply；
The output end of the infrared inductor 60 is connected to the single-chip microcontroller 50.
When it is implemented, as shown in Figure 1, the electric hair drier control circuit packet of high reliability provided by the embodiment of the utility model
Include power control circuit 10, fan motor driving circuit 20, heater strip driving circuit 30, regulator rectifier circuit 40, single-chip microcontroller 50
And infrared inductor 60；Wherein：
Power control circuit 10 include the first power input 11, second source input terminal 13, the first power output end 12,
Second source output end 14, switch S1 and relay K1；First power input 11 and second source input terminal 13 are for connecting
Utility grid is connect, wherein the first power input 11 connection exchange firewire, second source input terminal 13 connect AC neutral line；Second
Power input 13 and second source output end 14 are connected to ground wire；Switch S1 is connected in series in 11 He of the first power input
Between power output end, switch S1 is key switch, and when switch S1 is pressed, the first power input 11 and the first power supply are defeated
Outlet 12 is connected；
The contact of relay K1 is also connected in series between the first power input 11 and the first power output end 12；I.e. after
The contact of electric appliance K1 is connected in parallel with switch S1；One end of the coil of relay K1 is connected to the first DC power supply 41, and first is straight
Galvanic electricity source 41 by rectifying and voltage-stabilizing module convert obtain, as shown in Fig. 2, regulator rectifier circuit 40 include for decompression resistance R1,
Resistance R2 and capacitor C1, for the diode D2 and diode D3 of rectification, and voltage-stabiliser tube ZD1 and polar capacitor for pressure stabilizing
E1；The electric main exported by the first power output end 12 and second source output end 14, be depressured by regulator rectifier circuit 40,
The first DC power supply 41 and the second DC power supply 42 are exported after rectification and pressure stabilizing, wherein the output voltage of the first DC power supply 41
For+24V, for driving relay K1 to work, the output voltage of the second DC power supply 42 is+5V, for powering for single-chip microcontroller 50；
The other end of the coil of relay K1 is connected to the collector of triode Q1, and the emitter of triode Q1 is connected to the ground
Line, the base stage of triode Q1 are connected to the 11st pin of single-chip microcontroller 50；Preferably, triode Q1 is NPN type triode.Work as switch
When S1 is pressed, the first power input 11 is connected with the first power output end 12, the first power output end 12 and the second electricity
Source output terminal 14 exports the first DC power supply 41 and second to 40 input AC alternating current of regulator rectifier circuit, regulator rectifier circuit 40
DC power supply 42, single-chip microcontroller 50 power on start-up operation, and single-chip microcontroller 50 exports high level, triode to the base stage of triode Q1 at this time
The coil of Q1 conducting, relay K1 is powered, the contact closure of relay K1, even if switch S1 is opened at this time, the first power input
The contact that end 11 remains to provide relay K1 is connected with the first power output end 12, is continuously single-chip microcontroller 50 and relay K1 is mentioned
Power supply source；And when the first power input 11 is low to the output of the base stage of triode Q1 without alternating current input or single-chip microcontroller 50
When level, the coil of relay K1 does not have electric current to pass through, and the contact of relay K1 is opened, and single-chip microcontroller 50 is due to power supply disconnects
It stops working, until switch S1 is depressed again, single-chip microcontroller 50 just restarts work.
As shown in Figure 1, fan motor driving circuit 20 includes switch S2, rectifier bridge BG1 and fan motor M1；Preferably,
Rectifier bridge BG1 is full-wave rectification bridge；An input terminal of rectifier bridge BG1 is connected to the first power output end 12 by switch S2,
Another input terminal of rectifier bridge BG1 is connected to the second source output end 14；Two output ends of rectifier bridge BG1 connect respectively
It is connected to the both ends of fan motor M1；When single-chip microcontroller 50 is in running order, closure switch S2, the first power output end 12 and
The alternating current of two power output ends 14 input is powered after rectifier bridge BG1 rectification for fan motor M1, driving fan motor M1
Work.
Heater strip driving circuit 30 includes switch S3 and heater strip 31；One end of switch S3 is connected to first by switch S2
Power output end 12；The other end of switch S3 is connected to the second source output end 14 by the heater strip 31；Work as fan
When motor M1 is in running order, closure switch S3, heater strip 31, which is powered, starts to work.
As shown in figure 3, the electric hair drier control circuit of high reliability provided by the embodiment of the utility model further includes infrared sense
Device 60 is answered, infrared inductor 60 is powered by the second DC power supply 42, and the output end of infrared inductor 60 is connected to single-chip microcontroller 50
The 6th pin；When infrared inductor 60 detects that user leaves, infrared inductor 60 to single-chip microcontroller 50 send user from
The signal opened.
The electric hair drier control circuit of high reliability provided by the embodiment of the utility model, in actual work：In the first electricity
After source input terminal 11 and second source input terminal 13 connect electric main, by lower switch S1, single-chip microcontroller 50 is started to work, single-chip microcontroller
50 export high level to the base stage of triode Q1, and the coil of relay K1 is powered, the contact closure of relay K1；At this time by dialling
The i.e. controllable fan motor M1 work of dynamic switch S2, after switch S2 closure, the i.e. controllable heater strip 31 of toggle switch S3 works,
To make hair dryer blow out hot wind.
During hair dryer use, if user midway is left, infrared inductor 60 sends to single-chip microcontroller 50 and uses
The signal that person leaves, single-chip microcontroller 50 send low level signal to the base stage of triode Q1, and control relay stops working, thus disconnected
The power supply of single-chip microcontroller 50, fan motor M1 and heater strip 31 is opened, hair dryer stops working.
The electric hair drier control circuit of high reliability provided by the embodiment of the utility model, by power control circuit 10
Relay is set, in use suddenly in the case where power-off, the power supply circuit of hair dryer will be disconnected because relay stops working,
Even if Power resumption later, hair dryer will not start；Meanwhile infrared inductor 60 is set in hair dryer circuit, electricity is blown
If wind does not detect that human body signal, hair dryer will automatically power off, so that the Electrical Safety performance of hair dryer obtains greatly
It is promoted.
Preferably, the switch S2 is single-pole three-throw switch；Wherein, the movable contact O of the switch S2 is connected to described
One power output end 12；The first stationary contact A of the switch S2 is connected to the rectifier bridge BG1, and the second of the switch S2 is quiet
Contact B is connected to the first stationary contact A by diode D1；The third stationary contact C of the switch S2 is hanging.
When it is implemented, as shown in figure 4, switch S2 is single-pole three-throw switch, wherein the movable contact O of switch S2 is connected to the
One power output end 12；The first stationary contact A of switch S2 is connected to the rectifier bridge BG1, the second stationary contact B connection of switch S2
The anode of diode D1, the cathode of diode D1 are connected to the first stationary contact A；The third stationary contact C of switch S2 is hanging.Work as switch
When the movable contact O of S2 is connected with the first stationary contact B, due to the unilateal conduction characteristic of diode D1, the only friendship of half period
Galvanic electricity can be by diode D1, and the power of fan motor M1 and heater strip 31 is less than movable contact O and the first stationary contact A phase at this time
The power of fan motor M1 and heater strip 31 when connection；And when movable contact O is connected with third stationary contact C, fan motor
M1 and 31 no current of heater strip pass through.By switch S2, make fan motor M1 and heater strip 31 have small-power, it is high-power and
Do not work three kinds of working conditions.
Although herein more has used such as single-chip microcontroller, power supply, input, output end, transistor, relay, has added
The terms such as heated filament, rectifier bridge, but it does not exclude the possibility of using other terms.The use of these items is only for more convenient
Ground describes and explains the essence of the utility model；Being construed as any additional limitation all is and the utility model essence
What mind was disagreed.
Finally it should be noted that：The above various embodiments is only to illustrate the technical solution of the utility model, rather than limits it
System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should
Understand：It is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of
Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new
The range of each embodiment technical solution of type.
Claims (5)
1. a kind of electric hair drier control circuit of high reliability, it is characterised in that：It is driven including power control circuit (10), fan motor
Dynamic circuit (20), heater strip driving circuit (30), regulator rectifier circuit (40), single-chip microcontroller (50) and infrared inductor (60)；
Wherein：
The power control circuit (10) is defeated including the first power input (11), second source input terminal (13), the first power supply
Outlet (12), second source output end (14), switch S1 and relay K1；The switch S1 is key switch；The switch
S1 is connected in series between first power input (11) and the first power output end (12)；The contact of the relay K1
It is connected in series between first power input (11) and the first power output end (12)；The coil one of the relay K1
End is connected to the first DC power supply (41), and the other end of the coil of the relay K1 is connected to the collector of triode Q1, institute
The emitter for stating triode Q1 is connected to ground wire, and the base stage of the triode Q1 is connected to the single-chip microcontroller (50)；Described second
Power input (13) and the second source output end (14) are connected to ground wire；
The fan motor driving circuit (20) includes switch S2, rectifier bridge BG1 and fan motor M1；The rectifier bridge BG1's
One input terminal is connected to first power output end (12), another input terminal of the rectifier bridge BG1 by switch S2
It is connected to the second source output end (14)；Two output ends of the rectifier bridge BG1 are respectively connected to the fan motor
Both ends；
The heater strip driving circuit (30) includes switch S3 and heater strip (31)；One end of the switch S3 passes through the switch
S2 is connected to first power output end (12)；The other end of the switch S3 is connected to described by the heater strip (31)
Second source output end (14)；
The regulator rectifier circuit (40) is connected with first power output end (12) and second source output end (14), institute
State regulator rectifier circuit (40) for export the first DC power supply (41) and the second DC power supply (42), first DC power supply
(41) it powers for the relay K1；Second DC power supply (42) is the single-chip microcontroller (50) power supply；
The output end of the infrared inductor (60) is connected to the single-chip microcontroller (50).
2. the electric hair drier control circuit of high reliability according to claim 1, it is characterised in that：The switch S2 is hilted broadsword
Three throw switches；Wherein, the movable contact O of the switch S2 is connected to first power output end (12)；The of the switch S2
One stationary contact A is connected to the rectifier bridge BG1, and the second stationary contact B of the switch S2 is connected to described by diode D1
One stationary contact A；The third stationary contact C of the switch S2 is hanging.
3. the electric hair drier control circuit of high reliability according to claim 2, it is characterised in that：The second of the switch S2
Stationary contact B connects the anode of the diode D1.
4. the electric hair drier control circuit of high reliability according to claim 1, it is characterised in that：The rectifier bridge BG1 is
Full-wave rectification bridge.
5. the electric hair drier control circuit of high reliability according to claim 1, it is characterised in that：The triode Q1 is
NPN type triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820591692.5U CN208112227U (en) | 2018-04-24 | 2018-04-24 | A kind of electric hair drier control circuit of high reliability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820591692.5U CN208112227U (en) | 2018-04-24 | 2018-04-24 | A kind of electric hair drier control circuit of high reliability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208112227U true CN208112227U (en) | 2018-11-16 |
Family
ID=64116845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820591692.5U Active CN208112227U (en) | 2018-04-24 | 2018-04-24 | A kind of electric hair drier control circuit of high reliability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208112227U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109480444A (en) * | 2018-12-10 | 2019-03-19 | 深圳和而泰智能控制股份有限公司 | A kind of Blowing drum |
| CN109802361A (en) * | 2019-01-21 | 2019-05-24 | 无锡美偌科微电子有限公司 | Circuit for controlling motor and motor |
| CN110215038A (en) * | 2019-06-14 | 2019-09-10 | 浙江杜马卫浴股份有限公司 | A kind of induction hair dryer |
| CN112835399A (en) * | 2021-01-08 | 2021-05-25 | 厦门芯阳科技股份有限公司 | Control method and device for battery type hair dryer |
| CN115356966A (en) * | 2022-08-30 | 2022-11-18 | 九牧厨卫股份有限公司 | Hair drier, control circuit thereof and blowing device |
-
2018
- 2018-04-24 CN CN201820591692.5U patent/CN208112227U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109480444A (en) * | 2018-12-10 | 2019-03-19 | 深圳和而泰智能控制股份有限公司 | A kind of Blowing drum |
| CN109480444B (en) * | 2018-12-10 | 2024-04-09 | 深圳和而泰智能控制股份有限公司 | Blowing cylinder |
| CN109802361A (en) * | 2019-01-21 | 2019-05-24 | 无锡美偌科微电子有限公司 | Circuit for controlling motor and motor |
| CN109802361B (en) * | 2019-01-21 | 2020-05-05 | 无锡美偌科微电子有限公司 | Motor control circuit and motor |
| CN110215038A (en) * | 2019-06-14 | 2019-09-10 | 浙江杜马卫浴股份有限公司 | A kind of induction hair dryer |
| CN112835399A (en) * | 2021-01-08 | 2021-05-25 | 厦门芯阳科技股份有限公司 | Control method and device for battery type hair dryer |
| CN115356966A (en) * | 2022-08-30 | 2022-11-18 | 九牧厨卫股份有限公司 | Hair drier, control circuit thereof and blowing device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208112227U (en) | A kind of electric hair drier control circuit of high reliability | |
| WO2014131296A1 (en) | Control circuit of time relay | |
| CN203707489U (en) | Intelligent energy-saving socket | |
| CN105932654A (en) | Air conditioner and power supply control circuit of fan for air conditioner | |
| WO2020170142A1 (en) | Method and apparatus for load monitoring | |
| CN108566121B (en) | Compressor starting circuit and refrigeration equipment | |
| CN108963970B (en) | Load protection circuit and air conditioner | |
| CA2716828C (en) | Control circuit for single-phase ac motor of dryer | |
| CN115441754A (en) | Power supply circuit, power supply circuit and electrical apparatus | |
| CN104730971A (en) | Micro-power consumption standby system and device | |
| CN208209847U (en) | A kind of electric machine control system for super bath | |
| CN108447734A (en) | A kind of relay drive circuit and method of high reliability | |
| KR101657228B1 (en) | Apparatus for controlling stand-by power of air conditioner | |
| CN114459137A (en) | Zero-line and fire-line conditioning device of air conditioner, control method of zero-line and fire-line conditioning device and air conditioner | |
| CN102323835B (en) | A kind of electronic thermostat of band compressor start-up function | |
| CN109511187B (en) | Electromagnetic heating device and control circuit and method for reducing standby power consumption of electromagnetic heating device | |
| CN111538268A (en) | Single-live-wire electricity-taking intelligent switch, wireless control device and power supply control system | |
| CN110824995A (en) | Remote control alternating current switch module with micro standby power consumption | |
| CN110972365A (en) | Silicon controlled rectifier circuit based on high-efficiency off-line LED dimming | |
| CN211694813U (en) | Steam generator of wide voltage | |
| CN220017481U (en) | Driving circuit of heating device | |
| CN104283073A (en) | Power socket capable of automatically cutting off power in time of power recovery happening after power outage | |
| CN109818412A (en) | A kind of controller and method for realizing twin voltage input | |
| CN216774632U (en) | Double-voltage circuit applied to direct-current power supply equipment | |
| CN216057512U (en) | Control circuit for one-to-N interactive control of low-voltage electric heating film electric heating |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |