CN206020957U - A kind of sensing control circuit of flatiron - Google Patents

Abstract

The utility model discloses a kind of sensing control circuit of flatiron, including resistance reduction voltage circuit, half-wave rectifying circuit, control chip, sensor, relay and relay drive circuit, the electric main send half-wave rectifying circuit through resistance reduction voltage circuit, the half-wave rectifying circuit is respectively relay drive circuit and control chip is powered, the relay drive circuit control chip the first controlled output port control under to relay coil power supply, the switch of the relay is serially connected between electric main and ac output end mouth, the control chip is electrically connected with sensor, the control chip and relay drive circuit are integrated into sensor internal and constitute a module.Control chip and relay drive circuit are integrated into sensor internal and make module by this utility model, greatly reduce the probability that signal is disturbed, relay drive circuit will not affected by moisture, substrate reduces for moistureproof demand, reduce substrate difficulty of processing, effectively reduce the cost of substrate.

Description

A kind of sensing control circuit of flatiron

Technical field

This utility model belongs to flatiron control field, more particularly to a kind of sensing control circuit of flatiron.

Background technology

Existing flatiron product is required for judgement to keep flat or place vertically, keeps flat the short time and is failure to actuate and needs power-off protection, Placing long-time vertically needs to close heating, reaches the purpose of energy-conservation.Current scheme is all to add control chip and outer using sensor Enclose the mode that drive circuit combines to be designed, the judgement of flatiron location status is responsible for by sensor, control chip is responsible for externally Enclose drive circuit to be controlled, control chip is needed through line transmissions with sensor, and signal is easily disturbed, control core Piece control driving circuit drives relay to be operated, impact of easily making moist.The steam produced during flatiron use is also always The reliability service of substrate is affected, and the protection against the tide of sensor itself has had very big lifting using the ultrasonic technology of housing, but Be the signal transmission line of moistureproof and control chip and sensor, control chip and driving circuit of control chip in substrate also all A moistureproof difficult problem is faced with, so moistureproof cost is very high in the proportion of overall plan cost, will directly if solving moistureproof problem Reduction scheme cost.

Content of the invention

The purpose of this utility model be as solving the above problems and provide a kind of will control chip and relay driving electricity Road is integrated into sensor internal and makes module, greatly reduces the probability that signal is disturbed, and relay drive circuit will not make moist Gas affects, and substrate reduces for moistureproof demand, and improves the modular Integrated of design, final reduction substrate difficult processing Degree, effectively reduces the sensing control circuit of the flatiron of the cost of substrate.

For this purpose, the utility model discloses a kind of sensing control circuit of flatiron, including resistance reduction voltage circuit, halfwave rectifier Circuit, control chip, sensor, relay and relay drive circuit, the electric main send half-wave through resistance reduction voltage circuit Rectification circuit, the half-wave rectifying circuit is respectively relay drive circuit and control chip is powered, the relay driving electricity Road under coil power supply from the first controlled output port control of control chip to relay, the switch of the relay is serially connected with Between electric main and ac output end mouth, the control chip is electrically connected with sensor, and the control chip and relay drive Galvanic electricity road is integrated into sensor internal and constitutes a module.

Further, also include that zero cross detection circuit, the zero cross detection circuit are serially connected with the output of resistance reduction voltage circuit Between port and the first signal input port of control chip.

Further, the relay drive circuit includes semiconductor switch Q1 and Q2, resistance R6, resistance R7, resistance R8 With electric capacity C3, the coil of semiconductor switch Q2 concatenation relay is followed by the first controlled output of control chip port wherein Between one controlled output pin and the positive output end of half-wave rectifying circuit, the semiconductor switch Q1 series resistor R7 are followed by Between another controlled output pin and the positive output end of half-wave rectifying circuit of the first controlled output of control chip port, described Semiconductor switch Q1 is connected with the control end of Q2, and the control end of the semiconductor switch Q1 is sequentially connected in series resistance R8 and R6 and connects half-wave The positive output end of rectification circuit, the node series capacitance C3 ground connection between the resistance R6 and R8.

Further, the semiconductor switch Q1 and Q2 is NPN triode.

Further, the secondary signal input of the control chip is also connected with the state output end of thermostat, is used for Obtain the working condition of thermostat.

Further, the second control output end of the control chip is connected with LED light.

Advantageous Effects of the present utility model：

Control chip and relay drive circuit are integrated into sensor internal and make module by this utility model, this module The function of existing sensor, and the relay outside directly driving, the probability drop that the integrated rear sensor signal of module is disturbed Low, and module can be in the moistureproof mode of direct share sensor, and relay drive circuit will not affected by moisture so that substrate For moistureproof demand reduces, and the modular Integrated of design is improved, final reduction substrate difficulty of processing effectively reduces The cost of substrate.

Description of the drawings

Connection block diagrams of the Fig. 1 for this utility model embodiment；

Physical circuit schematic diagrams of the Fig. 2 for this utility model embodiment.

Specific embodiment

This utility model is further illustrated in conjunction with the drawings and specific embodiments.

As depicted in figs. 1 and 2, a kind of sensing control circuit of flatiron, including resistance reduction voltage circuit 1, half-wave rectifying circuit 2nd, control chip 3, sensor 6, relay 5 and relay drive circuit 4, the electric main AC are sent through resistance reduction voltage circuit 1 After half-wave rectifying circuit 2 carries out halfwave rectifier, respectively relay drive circuit 4 and control chip 3 are powered, and the relay drives Galvanic electricity road 4 is in the first controlled output port of control chip 3（6th, 7 feet）Under coil power supply from control to relay 5, described after The switch of electrical equipment 5 is serially connected between electric main AC and ac output end mouth OUT, and the control chip 3 is electrically connected with sensor 6 Connect, control chip 3 is powered for sensor 6, while receiving the transducing signal of the output of sensor 6, sensor 6 is used for detecting that flatiron is In keeping flat or placing state vertically, the control chip 3 and relay drive circuit 4 are integrated into 6 Inner Constitution of sensor, one mould Block 10 so that the function of this 10 existing sensor of module, and the relay outside directly driving, senses after module 10 is integrated The probability that 6 signal of device is disturbed reduces, and module 10 can be with the moistureproof mode of direct share sensor 6, relay driving electricity Road will not affected by moisture so that substrate reduces for moistureproof demand, and improves the modular Integrated of design, finally Reduce substrate difficulty of processing, effectively reduce the cost of substrate.

Further, also include that zero cross detection circuit 7, the zero cross detection circuit 7 are serially connected with the defeated of resistance reduction voltage circuit 1 Exit port and the first signal input port of control chip 3（4th foot）Between, the secondary signal input of control chip 3（16th Foot）Also it is connected with the state output end CHK of thermostat 9, for obtaining the working condition of thermostat 9, the second control of control chip 3 Outfan processed（2nd foot）It is connected with LED light 8.

Specifically, Fig. 2 is referred again to, the relay drive circuit 4 includes semiconductor switch Q1 and Q2（Originally it is embodied as It is NPN triode in example, certainly, in other embodiments, or PNP or metal-oxide-semiconductor etc.）, resistance R6, resistance R7, resistance R8 and electric capacity C3, the coil of the NPN triode Q2 concatenation relay 5 are followed by 3 first controlled output port of control chip One of controlled output pin（7th foot）And the positive output end of half-wave rectifying circuit 2 between, the NPN triode Q1 concatenation Resistance R7 is followed by another controlled output pin in the first controlled output port of control chip 3（6th foot）And halfwave rectifier Between the positive output end VDD of circuit 2, the NPN triode Q1 is connected by wire jumper J2 with the base stage of Q2, the NPN triode The base stage of Q1 is sequentially connected in series the positive output end VDD that resistance R8 and R6 connect half-wave rectifying circuit 2, the section between the resistance R6 and R8 Point series capacitance C3 ground connection（It is connected with the ground terminal of control chip 3）, the switch K1B of relay 5 is serially connected with the phase of electric main AC Between line AC2 and ac output end mouth OUT.The physical circuit schematic diagram of the sensing control circuit of flatiron of the present utility model referring to Fig. 2, this are no longer described in detail.

The course of work：Sensor 6 detects flatiron state（Keep flat or place vertically）, and transducing signal is transferred to control chip 3, When control chip 3 detects flatiron in keeping flat or place vertically more than Preset Time, the 7th foot of control chip 3 is high level, NPN Type audion Q2 ends, and does not power to the coil K1A of relay 5, the switch K1B of relay 5 open circuit, make electric main AC not with Ac output end mouth OUT is connected, and is not powered to electric hot tray, meanwhile, the 6th human hair combing waste of control chip 3 goes out the alternate high frequency arteries and veins of height Punching, controls NPN type triode Q1 alternate conduction, forms fictitious load, maintains the electricity of the positive output end VDD of half-wave rectifying circuit 2 Pressure keeps stable.

When control chip 3 detects (such as stand up change keep flat or keep flat change stand up) when flatiron has state change, control chip 3 The civil power AC crossover point signals that zero cross detection circuit 7 is provided are obtained, before civil power AC next one zero crossings, control chip 3 7th foot be low level, NPN type triode Q2 turn on, power to the coil K1A of relay 5, the switch K1B of relay 5 is in civil power AC next one zero crossing adhesives, make to connect between electric main AC and ac output end mouth OUT, power to electric hot tray.

Control chip 3 detects the working condition of thermostat 9, when thermostat 9 is detected in work, control chip 3 2nd foot is high level, and LED light 8 is bright；When detecting thermostat 9 and not working, the 2nd foot of control chip 3 is low level, LED light 8 does not work, so as to pass through the bright of LED light 8 or the work it is known that whether flatiron is powered that do not work.

Although specifically showing and describing this utility model in conjunction with preferred embodiment, those skilled in the art should This is understood, in the spirit and scope of the present utility model limited without departing from appended claims, in form and details On this utility model can be made a variety of changes, be protection domain of the present utility model.

Claims (6)

1. a kind of sensing control circuit of flatiron, it is characterised in that：Including resistance reduction voltage circuit, half-wave rectifying circuit, control core Piece, sensor, relay and relay drive circuit, electric main send half-wave rectifying circuit through resistance reduction voltage circuit, and described half Ripple rectification circuit is respectively relay drive circuit and control chip and powers, the relay drive circuit in control chip the Under coil power supply from the control of one controlled output port to relay, the switch of the relay be serially connected with electric main with exchange defeated Between exit port, the control chip is electrically connected with sensor, and the control chip and relay drive circuit are integrated into sensing One module of device Inner Constitution.

2. the sensing control circuit of flatiron according to claim 1, it is characterised in that：Also include zero cross detection circuit, institute State between the first signal input port of output port and control chip that zero cross detection circuit is serially connected with resistance reduction voltage circuit.

3. the sensing control circuit of flatiron according to claim 1, it is characterised in that：The relay drive circuit includes Semiconductor switch Q1 and Q2, resistance R6, resistance R7, resistance R8 and electric capacity C3, the semiconductor switch Q2 concatenate the line of relay Circle is followed by the positive output of the one of controlled output pin in the first controlled output of control chip port and half-wave rectifying circuit Between end, another control that the semiconductor switch Q1 series resistor R7 are followed by the first controlled output of control chip port is defeated Go out between pin and the positive output end of half-wave rectifying circuit, the semiconductor switch Q1 is connected with the control end of Q2, described partly lead The control end of body switch Q1 is sequentially connected in series the positive output end that resistance R8 and R6 connect half-wave rectifying circuit, between the resistance R6 and R8 Node series capacitance C3 ground connection.

4. the sensing control circuit of flatiron according to claim 3, it is characterised in that：The semiconductor switch Q1 and Q2 is equal For NPN triode.

5. the sensing control circuit of flatiron according to claim 1, it is characterised in that：The secondary signal of the control chip Input is also connected with the state output end of thermostat, for obtaining the working condition of thermostat.

6. the sensing control circuit of flatiron according to claim 1, it is characterised in that：Second control of the control chip Outfan is connected with LED light.