CN105404332A

CN105404332A - Electric heating feet warming blanket with presettable temperature

Info

Publication number: CN105404332A
Application number: CN201510975647.0A
Authority: CN
Inventors: 周芸
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-12-21
Filing date: 2015-12-21
Publication date: 2016-03-16

Abstract

The invention provides an electric heating feet warming blanket with presettable temperature. The blanket is characterized in that the blanket comprises a 220V alternating current power supply, a capacitance resistance, voltage reduction and rectification 9V stabilized-voltage power supply, a temperature-sensitive detection and temperature presetting circuit, an electric heating driving circuit and a state indication circuit. The type of a time-based circuit IC1 in the temperature-sensitive detection and temperature presetting circuit is NE555. Once feet are warm in winter, people will not feel cold. On the contrary, even if one wears too much clothes, once his/her feet are cold, he/or she will feel cold. Thus, via the feet warming blanket, people can directly put his/her feet on the feet warming blanket without taking off his/her shoes to do homework, watch TV or work in a room without any heating system or air-conditioners in winter. The feet warming blanket is much practical and convenient than electric heating shoe covers in the market, is characterized by high adaptability, low power consumption and high working stability and is fit for common families and offices.

Description

Pin blanket is warmed up in the electrical heating of install beforehand temperature

Technical field

The invention belongs to electronics and technical field of temperature control, relate to the electrical heating of a kind of install beforehand temperature and warm up pin blanket.

Background technology

Practice shows: in the winter time once pin has warmed up, and whole body just sensation is also 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 ", health care, we want to avoid cold air, and cold air will be avoided to attack, and we 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 in air-conditioned room, see TV or office, use the electrical heating of an install beforehand temperature to warm up the warm both feet of pin blanket and just can solve very large problem, you do not need to take off one's shoes in use, pin can be placed directly in the electrical heating of install beforehand temperature warms up on pin blanket, and the electrically warmed shoe that it is released than market overlaps practicality, facilitates many.

The electrical heating of install beforehand temperature is warmed up pin blanket and is had that applicability is strong, low in energy consumption, functional reliability high, is applicable to the places such as general family, office.

Below describe install beforehand temperature of the present invention electrical heating in detail and warm up that pin blanket is involved necessary in implementation process, guardian technique content.

Summary of the invention

Goal of the invention and beneficial effect: in the winter time once pin has warmed up, whole body just sensation is also 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 ", health care, we want to avoid cold air, and cold air will be avoided to attack, and we 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, use the electrical heating of an install beforehand temperature to warm up the warm both feet of pin blanket and just can solve very large problem, you do not need to take off one's shoes in use, pin can be placed directly in the electrical heating of install beforehand temperature warms up on pin blanket, and the electrically warmed shoe that it is released than market overlaps practicality, facilitates many.The electrical heating of install beforehand temperature is warmed up pin blanket and is had that applicability is strong, low in energy consumption, functional reliability high, is applicable to the places such as general family, office.

Circuit working principle: the electrical heating of install beforehand temperature warms up pin blanket by 220V AC power through decompression capacitor C1, bleeder resistance R1 step-down and current limliting, through silicon rectifier diode D1 rectification, voltage stabilizing diode DW voltage stabilizing, and electric capacity C2 filtering obtains the 9V DC voltage needed for circuit after filtering.The lever arm current potential of potentiometer RP3 decides the 2nd pin trigger voltage of time base circuit IC1, and the 5th pin voltage of time base circuit IC1 is the twice of the 2nd pin trigger voltage of time base circuit IC1.During the 6th pin >=Vf of base IC circuit 1 at that time, time base circuit IC1 begins turning, the 3rd pin of time base circuit IC1 is made to become low level, LED extinguishes, bidirectional triode thyristor BCR ends, and the electrical heating wire in warm pin blanket stops powering up, and warm pin blanket surface temperature starts to decline gradually, the resistance of thermistor Rt reduces thereupon, makes the 6th pin of time base circuit IC1, the 2nd pin voltage of time base circuit IC1 reduces gradually.When temperature drops to setting value, the 3rd pin current potential of time base circuit IC gets back to high level, and LED is lighted, bidirectional triode thyristor BCR is triggered conducting, electrical heating wire starts again electrified regulation again, so goes round and begins again, and makes the surface temperature of warm pin blanket maintain design temperature all the time.

Technical scheme: pin blanket is warmed up in the electrical heating of install beforehand temperature, it comprises 220V AC power, resistance-capacitance depressurization rectification and 9V stabilized voltage supply, temperature-sensitive and detects and temperature preset circuit, electrothermal driving circuit, condition indication circuit, it is characterized in that:

Temperature-sensitive detects and temperature preset circuit: it is by time base circuit IC1, trimmer potentiometer RP1, trimmer potentiometer RP2, temperature control regulator potentiometer RP3, thermistor Rt 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, the lever arm of the 5th pin jointing temp presetting potential device RP3 of time base circuit IC1, the one termination circuit positive pole VCC of preset temperature potentiometer RP3, the other end connection circuit ground GND of preset temperature potentiometer RP3, 6th pin of time base circuit IC1 connects the movable end of trimmer potentiometer RP1, one end of the one termination thermistor Rt of trimmer potentiometer RP1, the other end connection circuit positive pole VCC of thermistor Rt, one end of another termination trimmer potentiometer RP2 of trimmer potentiometer RP1, 2nd pin of the movable knee-joint time base circuit IC1 of trimmer potentiometer RP2, the other end of trimmer potentiometer RP2 and the 1st pin connection circuit ground GND of time base circuit IC1,

Electrothermal driving circuit: it is made up of trigger resistance R2, bidirectional triode thyristor BCR and electrical heating wire, 3rd pin of time base circuit IC1 connects the control pole of bidirectional triode thyristor BCR by trigger resistance R2, the first anode T1 of bidirectional triode thyristor BCR connects one end of electrical heating wire, the second anode T2 connection circuit ground GND of the live wire end L of another termination 220V AC power of electrical heating wire, bidirectional triode thyristor BCR;

Condition indication circuit: it is made up of LED and dropping resistor R3, the positive pole of LED connects the 3rd pin of time base circuit IC1, and the negative pole of LED is by dropping resistor R3 connection circuit ground GND;

Resistance-capacitance depressurization rectification and 9V stabilized voltage supply: it is by decompression capacitor C1, bleeder resistance R1, silicon rectifier diode D1, filter capacitor C2, voltage stabilizing diode DW forms, the live wire end L of 220V AC power connects one end of decompression capacitor C1 and one end of bleeder resistance R1, the positive pole of the decompression capacitor C1 other end and another termination silicon rectifier diode of bleeder resistance R1 D1, the negative pole of silicon rectifier diode D1 meets the negative pole of stabilivolt diode DW and the positive pole of filter capacitor C2 and circuit anode VCC, the positive pole of stabilivolt diode DW and the negative pole connection circuit ground GND of filter capacitor C2, the zero line side N connection circuit ground GND of 220V AC power.

Accompanying drawing explanation

Accompanying drawing 1 the invention provides the embodiment circuit working schematic diagram that pin blanket is warmed up in the electrical heating of an install beforehand temperature.

Embodiment

Pin blanket circuit working schematic diagram and accompanying drawing explanation is warmed up according to the install beforehand temperature electrical heating shown in accompanying drawing 1, 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.

The technical parameter of components and parts and selection requirement

IC1 is time base circuit, and the model of employing is NE555;

Rt is thermistor, uses the thermistor that resistance is 8.2K Ω negative temperature coefficient;

BCR is bidirectional triode thyristor, and its working current is the bidirectional triode thyristor of 1A, withstand voltage more than 400V;

D1 is silicon rectifier diode, and the model selected is 1N4007;

DW voltage stabilizing diode, the voltage stabilizing value selected is 9V, 1W;

LED is red light emitting diodes;

RP1, RP2 are trimmer potentiometer, and its resistance is 5K Ω, 10K Ω respectively; RP3 is preset temperature potentiometer, selects linear potentiometer, and its resistance is 33K Ω;

R1 is bleeder resistance, and its resistance is 680K Ω, and power is 1W; The resistance of trigger resistance R2 is 22K Ω; The resistance of dropping resistor R3 is 820 Ω;

C1 is decompression capacitor, and capacity is 0.68 μ F/450V; C2 is filter capacitor, and capacity is 1000 μ F/25V;

The power of electrical heating wire is the electrical heating wire of 80 ~ 100W/220V, optional electric blanket.

Circuit production main points and circuit debugging

The circuit structure warming up pin blanket because of the electrical heating of install beforehand temperature is fairly simple, 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 only needs to debug simply and can normally work;

The process of thermistor Rt: use resistant to elevated temperatures thin and soft wire to draw at the two ends of thermistor Rt, and thermistor Rt is loaded in an aluminum hull, filling heat-conductive silicone grease in aluminum hull also seals with fire resistant resin, and is placed on the medium position that electrical heating wire warms up pin blanket;

Adjustment preset temperature potentiometer RP3, the voltage of the 5th pin of time base circuit IC1 is made to be the twice of the 2nd pin voltage of time base circuit IC1, during the 6th pin voltage >=Vf of time base circuit IC1, the 3rd pin level upset of time base circuit IC1, makes the 3rd pin of time base circuit IC1 become low level;

Trimmer potentiometer RP2 is regulated to make temperature range be zero; Regulate the resistance of trimmer potentiometer RP2, make the 2nd pin voltage of time base circuit IC1 equal the voltage of the 6th pin, make the temperature control scope of preset temperature potentiometer RP3 reach maximum.

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. a pin blanket is warmed up in the electrical heating of install beforehand temperature, and it comprises 220V AC power, resistance-capacitance depressurization rectification and 9V stabilized voltage supply, temperature-sensitive and detects and temperature preset circuit, electrothermal driving circuit, condition indication circuit, it is characterized in that:

Described temperature-sensitive detection and temperature preset circuit are by time base circuit IC1, trimmer potentiometer RP1, trimmer potentiometer RP2, temperature control regulator potentiometer RP3, thermistor Rt 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, the lever arm of the 5th pin jointing temp presetting potential device RP3 of time base circuit IC1, the one termination circuit positive pole VCC of preset temperature potentiometer RP3, the other end connection circuit ground GND of preset temperature potentiometer RP3, 6th pin of time base circuit IC1 connects the movable end of trimmer potentiometer RP1, one end of the one termination thermistor Rt of trimmer potentiometer RP1, the other end connection circuit positive pole VCC of thermistor Rt, one end of another termination trimmer potentiometer RP2 of trimmer potentiometer RP1, 2nd pin of the movable knee-joint time base circuit IC1 of trimmer potentiometer RP2, the other end of trimmer potentiometer RP2 and the 1st pin connection circuit ground GND of time base circuit IC1,

Described electrothermal driving circuit is made up of trigger resistance R2, bidirectional triode thyristor BCR and electrical heating wire, 3rd pin of time base circuit IC1 connects the control pole of bidirectional triode thyristor BCR by trigger resistance R2, the first anode T1 of bidirectional triode thyristor BCR connects one end of electrical heating wire, the second anode T2 connection circuit ground GND of the live wire end L of another termination 220V AC power of electrical heating wire, bidirectional triode thyristor BCR;

Described condition indication circuit is made up of LED and dropping resistor R3, and the positive pole of LED connects the 3rd pin of time base circuit IC1, and the negative pole of LED is by dropping resistor R3 connection circuit ground GND;

Described resistance-capacitance depressurization rectification and 9V stabilized voltage supply are by decompression capacitor C1, bleeder resistance R1, silicon rectifier diode D1, filter capacitor C2, voltage stabilizing diode DW forms, the live wire end L of 220V AC power connects one end of decompression capacitor C1 and one end of bleeder resistance R1, the positive pole of the decompression capacitor C1 other end and another termination silicon rectifier diode of bleeder resistance R1 D1, the negative pole of silicon rectifier diode D1 meets the negative pole of stabilivolt diode DW and the positive pole of filter capacitor C2 and circuit anode VCC, the positive pole of stabilivolt diode DW and the negative pole connection circuit ground GND of filter capacitor C2, the zero line side N connection circuit ground GND of 220V AC power.