CN105425864A

CN105425864A - Timing controller for electric foot warming plate

Info

Publication number: CN105425864A
Application number: CN201511032015.7A
Authority: CN
Inventors: 周玉林
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-12-30
Filing date: 2015-12-30
Publication date: 2016-03-23

Abstract

The invention provides a timing controller for an electric foot warming plate. The timing controller is characterized in that the timing controller comprises a 220V AC power supply, a resistance-capacitance voltage reducing half-wave rectifying circuit, a 12V DC regulated power supply, a starting and timing circuit, and an electric heating wire control circuit; and the type of a time base circuit IC1 in the starting and timing circuit is NE555. When a person stays in a room without a heater or an air conditioner for doing homework, watching TV or handling official businesses for a long time in winter, one electric heater for heating double feet can settle a practical problem. In use of the timing controller, shoe taking-off or shoe changing is not required. Double feet in shoes can be directly placed on the electric foot warming plate. The electric foot warming plate is more practical, more convenient and safer than various electric heating shoe sleeves with power lines on market. The circuit of the timing controller of the electric foot arming plate has advantages of high applicability, low power consumption, high operation reliability, etc. Furthermore the timing controller for the electric foot warming plate is suitable for places of home, office, etc.

Description

Electrothermal feet plate timing controller

Technical field

The invention belongs to electronic auto-control technology field, relate to a kind of electrothermal feet plate timing controller.

Background technology

Warm under general sole in the winter time, whole body just feels not too cold; On the contrary, alter very abundant with it, once ice-cold under sole, will feel that whole body is terribly cold.The traditional Chinese medical science is often said, " all diseases are from cold, cold raw from foot ", we want to avoid cold air to attack, and will carry out the warming of foot.So treat winter not only there is no heating installation, but also do not have to do the homework or see TV or office in air-conditioned room for a long time, use the warm both feet of electrical heating electric foot warmer just can solving practical problems, during use, you do not need to take off one's shoes, also footwear need not be changed, can the both feet wearing footwear be placed directly in above electric foot-warming board, the electrically warmed shoe cover of the various traction power leads that it is released than market is practical, convenient, safety many.The circuit of electrothermal feet plate timing controller has that applicability is strong, low in energy consumption, functional reliability high, is adapted at the place such as family, office and uses.

Electrothermal feet plate timing controller of the present invention, after pressing one-touch switch AN, heating wire starts electrified regulation; When reaching 20 minutes when operating, timing circuit will cut off the working power of heating wire automatically, so both effectively stopped unnecessary power wastage, and also available protecting heating wire can not be burned because of overheated.

Below describe that electrothermal feet plate timing controller of the present invention is involved necessary in implementation process, guardian technique content in detail.

Summary of the invention

Goal of the invention and beneficial effect: treat winter not only there is no heating installation, but also do not have to do the homework or see TV or office in air-conditioned room for a long time, use the warm both feet of electrical heating electric foot warmer just can solving practical problems, during use, you do not need to take off one's shoes, also footwear need not be changed, can the both feet wearing footwear be placed directly in above electric foot-warming board, the electrically warmed shoe cover of the various traction power leads that it is released than market is practical, convenient, safety many.The circuit of electrothermal feet plate timing controller has that applicability is strong, low in energy consumption, functional reliability high, is adapted at the place such as family, office and uses.Electrothermal feet plate timing controller of the present invention, after pressing one-touch switch AN, heating wire starts electrified regulation; When reaching 20 minutes when operating, timing circuit will cut off the working power of heating wire automatically, so both effectively stopped unnecessary power wastage, and also available protecting heating wire can not be burned because of overheated.

Circuit working principle: electrothermal feet plate timing controller of the present invention is made up of with timing circuit, heating wire control circuit resistance-capacitance depressurization half-wave rectifying circuit, 12V D.C. regulated power supply, start-up circuit.

The working power of electrothermal feet plate timing controller carries out half-wave rectification, voltage stabilizing diode DW voltage stabilizing obtaining after electrochemical capacitor C2 filtering by 220V alternating current through C1 step-down, silicon rectifier diode D1.When pressing keyswitch AN, low level is presented instantaneously by making the 2nd pin of time base circuit IC1, now the 3rd pin of time base circuit IC1 exports high level immediately, bidirectional triode thyristor BCR to be triggered conducting by trigger resistance R4, while heating wire starts electrified regulation, 12V D.C. regulated power supply charges to electrochemical capacitor C3 through resistance R3, when the both end voltage of electrochemical capacitor C3 reaches 2/3 D.C. regulated power supply voltage, 3rd pin of time base circuit IC1 becomes low level, bidirectional triode thyristor BCR cuts off the power supply of heating wire and quits work, then electrochemical capacitor C3 institute charging voltage discharges rapidly through time base circuit IC1 internal discharge pipe, make circuit reset.Once, electrothermal feet plate timing working is about 20 minutes to depresses button switch AN.

Technical characteristic: electrothermal feet plate timing controller, it comprises 220V AC power, resistance-capacitance depressurization half-wave rectifying circuit, 12V D.C. regulated power supply, start-up circuit and timing circuit, heating wire control circuit, it is characterized in that:

Start-up circuit and timing circuit: it is by resistance R2, keyswitch AN, time base circuit IC1, resistance R3 and electrochemical capacitor C3 forms, the model that time base circuit IC1 selects is NE555, 4th pin of time base circuit IC1 and the 8th pin connection circuit positive pole VCC, 2nd pin of time base circuit IC1 connects one end of keyswitch AN and one end of resistance R2, the other end connection circuit positive pole VCC of resistance R2, the other end connection circuit ground GND of keyswitch AN, 6th pin of time base circuit IC1 and one end of the 7th pin connecting resistance R3 and the positive pole of electrochemical capacitor C3, the other end connection circuit positive pole VCC of resistance R3, the negative pole of electrochemical capacitor C3 and the 1st pin connection circuit ground GND of time base circuit IC1,

Heating wire control circuit: it is made up of bidirectional triode thyristor BCR, trigger resistance R4, heating wire, the control pole G of bidirectional triode thyristor BCR connects the 3rd pin of time base circuit IC1 by trigger resistance R4, the first anode T1 of bidirectional triode thyristor BCR connects one end of heating wire, the second anode T2 connection circuit ground GND of the live wire end L of another termination 220V AC power of heating wire, bidirectional triode thyristor BCR;

Resistance-capacitance depressurization half-wave rectifying circuit: it is made up of decompression capacitor C1, bleeder resistance R1, silicon rectifier diode D1, the live wire end L of one end of decompression capacitor C1 and a termination 220V AC power of bleeder resistance R1, the positive pole of the other end of decompression capacitor C1 and another termination silicon rectifier diode D1 of bleeder resistance R1, the negative pole connection circuit positive pole VCC of silicon rectifier diode D1;

12V D.C. regulated power supply: it is made up of voltage stabilizing diode DW, electrochemical capacitor C2, the negative pole of silicon rectifier diode D1 connects the negative pole of stabilivolt diode DW and the positive pole of electrochemical capacitor C2, the positive pole of stabilivolt diode DW and the negative pole connection circuit ground GND of electrochemical capacitor C2, the negative pole connection circuit positive pole VCC of silicon rectifier diode D1, the zero line side N of circuit ground GND and 220V AC power is connected.

Accompanying drawing explanation

Accompanying drawing 1 is the circuit working schematic diagram of an electrothermal feet plate timing controller provided by the invention embodiment;

Embodiment

According to the electrothermal feet plate timing controller circuit fundamental diagram shown in accompanying drawing 1 and accompanying drawing explanation, and according to annexation between components and parts in each several part circuit described in summary of the invention, and components and parts technical parameter described in embodiment requires and circuit production main points are carried out enforcement and can be realized the present invention, is further described correlation technique of the present invention below in conjunction with embodiment.

Components and parts title and important technological parameters thereof

Element number	Components and parts title	Technical parameter	Quantity	Explanation
					IC1	Time base circuit	8 pin dual-in-lines, DIP seal	1	Model: NE555
D1	Silicon rectifier diode	Plastic packaging, 1A/400V	1	Model: IN4007
					DW	Voltage stabilizing diode	12V、1W	1
BCR	Bidirectional triode thyristor	1A/400V	1
					R1	Bleeder resistance	1W、680KΩ	1	Metalfilmresistor
R2	Resistance	1/8W、20KΩ	1	Metalfilmresistor
					R3	Resistance	1/8W、1MΩ	1	Metalfilmresistor
R4	Trigger resistance	1/8W、33KΩ	1	Metalfilmresistor
					C1	Electric capacity of the dacron	0.1μF/450V	1	Vertical
C2	Electrochemical capacitor	470μF/25V	1	Vertical
					C3	Electrochemical capacitor	1000μF/25V	1	Vertical
AN	Keyswitch	Open in usual	1

The parameter of heating wire is 90 ~ 100W/220V, recommends to adopt electrical heating wire in electric blanket to make.

Circuit production main points and circuit debugging

Because the circuit structure of electrothermal feet plate timing controller is fairly simple, comparison is easy, as long as the electronic devices and components performance generally selected is intact, and the components and parts annexation to specifications in accompanying drawing 1 is welded, physical connection line and welding quality are through carefully checking correctly, and circuit of the present invention does not substantially need to carry out any debugging and can normally work;

1. the circuit working schematic diagram to specifications in accompanying drawing 1, in check circuit the welding correctness of whole components and parts and welding quality through confirmation errorless after, circuit generally can normally work without the need to carrying out debugging;

2. increase the resistance of resistance R3 or strengthen the capacity of electrochemical capacitor C3, the timing working time of heating wire can be extended;

3. after pressing one-touch switch AN, electrothermal feet plate is started working, and when the heating wire working time reaches 20 minutes, timing circuit will cut off the working power of heating wire automatically; If the heating wire working time time not enough, can allow electrothermal feet plate timing controller restart work once.

Circuit structure design of the present invention, components' placement; and its face shaping design and size etc. thereof are not all gordian techniquies of the present invention; neither application claims protection guardian technique content; because not affecting the realization of specific implementation process of the present invention and goal of the invention, therefore do not illustrate one by one in the description.

Claims

1. an electrothermal feet plate timing controller, it comprises 220V AC power, resistance-capacitance depressurization half-wave rectifying circuit, 12V D.C. regulated power supply, start-up circuit and timing circuit, heating wire control circuit, it is characterized in that:

Described start-up circuit and timing circuit are by resistance R2, keyswitch AN, time base circuit IC1, resistance R3 and electrochemical capacitor C3 forms, the model that time base circuit IC1 selects is NE555, 4th pin of time base circuit IC1 and the 8th pin connection circuit positive pole VCC, 2nd pin of time base circuit IC1 connects one end of keyswitch AN and one end of resistance R2, the other end connection circuit positive pole VCC of resistance R2, the other end connection circuit ground GND of keyswitch AN, 6th pin of time base circuit IC1 and one end of the 7th pin connecting resistance R3 and the positive pole of electrochemical capacitor C3, the other end connection circuit positive pole VCC of resistance R3, the negative pole of electrochemical capacitor C3 and the 1st pin connection circuit ground GND of time base circuit IC1,

Described heating wire control circuit is made up of bidirectional triode thyristor BCR, trigger resistance R4, heating wire, the control pole G of bidirectional triode thyristor BCR connects the 3rd pin of time base circuit IC1 by trigger resistance R4, the first anode T1 of bidirectional triode thyristor BCR connects one end of heating wire, the second anode T2 connection circuit ground GND of the live wire end L of another termination 220V AC power of heating wire, bidirectional triode thyristor BCR;

Described resistance-capacitance depressurization half-wave rectifying circuit is made up of decompression capacitor C1, bleeder resistance R1, silicon rectifier diode D1, the live wire end L of one end of decompression capacitor C1 and a termination 220V AC power of bleeder resistance R1, the positive pole of the other end of decompression capacitor C1 and another termination silicon rectifier diode D1 of bleeder resistance R1, the negative pole connection circuit positive pole VCC of silicon rectifier diode D1;

Described 12V D.C. regulated power supply is made up of voltage stabilizing diode DW, electrochemical capacitor C2, the negative pole of silicon rectifier diode D1 connects the negative pole of stabilivolt diode DW and the positive pole of electrochemical capacitor C2, the positive pole of stabilivolt diode DW and the negative pole connection circuit ground GND of electrochemical capacitor C2, the negative pole connection circuit positive pole VCC of silicon rectifier diode D1, the zero line side N of circuit ground GND and 220V AC power is connected.