CN2160935Y - Automatic temp controller and electric heater for electrothermic blanket, incubator and heat insulation cabinet - Google Patents

Abstract

The utility model relates to an automatic temperature controller and an electric heater for electric blankets, an incubator and a heat insulation cabinet. When the temperature information which is sensed by a thermal resistor inputs the time-base circuit feet by filtration, the temperature controlling sensitivity is less than +0.1 DEG and-0.1 DEG and the temperature controlling range is 100DEG. C. After a slight power consumption optical coupling two-wire electronic switch turns off the electrical source, the electric heater hasn't fire and electricity, electrical leakage and induction; the utility model realizes a power switch automatic ideal assembly.

Description

Automatic temp controller and electric heater for electrothermic blanket, incubator and heat insulation cabinet

The utility model relates to a kind of thermostat that electric heater power is controlled automatically and makes the electric heater of low-temperature of heating wire.

The heating face of making the low-temperature electric heater of heating wire is big, and temperature rise is fast and evenly soft, flames of anger high temperataure phenomena, and the third gear temperature regulating switch of adapted can be regulated the power supply on-state situation of electric heater and realizes temperature adjusting.But, both needed artificial regulatory, can not select the temperature controlling value that suits again, this people in daily life, be difficult to adapt to the needs of operate as normal and sleep.The electric warming mattress that miniature constant temperature incubator that Chinese patent A01K 41,/00 87214268 X proposes and A47G 9,/00 2051472 U and A47G 9,/06 88204379 X propose, have some problems so again, the temperature-control range of its temperature control part is narrow＜and 15 ℃, temperature control sensitivity ± 0.2 ℃, be subject to the interference of power supply ripple and extraneous clutter again, and produce the high frequency radiation interference wave, influence televisor low-frequency range and wireless normal reception; The power supply control of incompatibility line voltage electrical appliance.The electric heater of incubator and electric blanket, all adopt the above wide line-spacing wiring method of 2CM, like this, just must take big current work mode, just can reach the temperature rise requirement of electrical appliance, the heat that heating wire produces is difficult to make the temperature rise in its line-spacing gap close again, not only makes self temperature difference of electric heater big, makes that also the temperature rise speed of electrical appliance is slow; Electric heater under the big current work can improve temperature rise speed, has but increased power consumption, reduced withstand voltage properties, heating wire can corrosion, fracture damage occur or like disconnected non-disconnected phenomenon because of overheated generation qualitative change, occurs very easily during use that local overheating is caught fire or the arcing phenomenon, causes fire failure; Also can be because of the overheated scald children skin of heating wire; Electric heater power be not provided with under the situation of automatic temperature control device, is often happening occasionally because of forgetting turning off the phenomenon that fire failure appears in power supply.

The purpose of this utility model is the electric heater that a kind of improved automatic temperature control device and electric blanket, incubator, insulation cabinet will be provided, it can carry out temperature and control automatically to the on/off of electric heater, can improve the programming rate and the withstand voltage properties of electric heater again, cut down the consumption of energy, prolong the serviceable life of electric heater, stop to scald and the generation of fire failure, can also make electric heater for electric blanket with physiotherapy function, make sleep comfortable, build up health.

The purpose of this utility model is achieved in that on thermistor R3, the potentiometer R4 of the temperature information testing circuit of automatic temperature control device and the 6. pin that capacitor C 3 is connected in time base circuit D, the 2. pin connecting resistance R5 of D is to ground, and temperature automatic control signal level is by the 3. pin output of D; The two-wire electronic switch is the combination that two symmetrical and independent single line electronic switches are arranged, form photoelectrical coupler with the joining light emitting diode Ho of the 3. pin of D with photosensitive diode VBa and VBb, the working power of the power switch element thyristor VQa and the VQb control utmost point, take from power end corresponding with it by Ca1 and Cb1 respectively, phase line of power and zero line link with electric heater RB after the control of two-wire electronic switch; Electric heater RB comprises the electric heater of electric blanket, incubator and insulation cabinet, and heating wire wiring line-spacing preferably is controlled at the 0.1CM-2CM scope, and working current should be selected in the 250MA; When RB was the electric blanket electric heater of plane temperature lifting type, heating wire separated regions ground density distributed, and space-in acts on the waist elbow and the popliteal two Qu Si positions of human body apart from being preferably between 0.7CM～1.5CM with the double energy of current collection magnetic field and thermal field; When RB is the electric heater of three-dimensional temperature lifting type, heating wire distributes and is attached on the internal face of casing, the bottom surface wiring line-spacing of main heating can be selected in the 0.1CM-1CM scope, wiring line-spacing ratio should be got 1:2:2:0.4, the line-spacing of incubator electric heater than order is: the main end, secondary top, benefit limit, strong four jiaos, the line-spacing of insulation cabinet electric heater than order is: the main end, secondary, benefit top, strong four jiaos.

The temperature information testing circuit mainly contain time base circuit D and on every side element constitute.The 2. pin connecting resistance R5 of D is to ground, for it is provided with the low level of one≤1/3Vcc, resistance R 2 provides the high level of one 〉=2/3Vcc for 6. pin, and thermistor R3 and potentiometer R4 are serially connected between the 6. pin and ground of D, temperature sensor signal and temperature range value point is transferred established signal by 6. pin input.Capacitor C 3.4 and resistance R 5, elimination power supply ripple and extraneous clutter enter 6. pin and 2. pin interference sensitivity respectively, eliminate the generation of high frequency radiation ripple in the D simultaneously.Automatic control signal level after D detects is relatively controlled the light emitting diode H0-2 of photoelectrical coupler and heating and cooling indication simultaneously by 3. pin output, has guaranteed that their work is synchronous, and R0 and R6.7 are respectively their current-limiting resistances.

The two-wire electronic switching circuit is the combination that the identical and symmetrical and independent single line electronic switch of two of a.b is arranged.Single line electronic switch a: thyristor VQa is a power switch element, photodiode VBa is the photoelectricity Coupling Control on-off element of the VQa control utmost point, current limliting step-down coupling capacitance Ca1, full-wave rectification diode Va1.2, filtering electrical equipment Ca2, resistance R a1 and voltage stabilizing current limliting diode Va3, resistance R a2 are combined into the working power circuit of Vaa control utmost point rectifying and wave-filtering voltage stabilizing together.Obtaining of this working power can be taken from power lead B end corresponding with it by capacitor C a1, and 1. the first utmost point tap that also can be connected to power transformer T by the negative pole of diode Va1 holds, and the latter has save diode Va2.3, capacitor C a1 and resistance R a1.Single line electronic switch a and b in like manner, the tap voltage V of T 1. ≈ V 2.=9V～12V.

Electric heater RB.The electric blanket electric heater of plane temperature lifting type, heating wire wiring line-spacing mainly adopts 2CM space-out distance and 1CM space-in apart from mixing wiring method, reserve under the human body ankle and the shoulder upper part after wiring area length get 125CM, the middle part is routed to the space-out of 45CM length apart from the district, be close to its two ends and respectively connect up the space-in of 25CM length apart from the district, space-in apart from the two ends, district outwards the wiring of each surplus 15CM length be that space-out is apart from the district.The electric heater of the incubator insulation cabinet of three-dimensional temperature lifting type, electric heater is preferably selected naked formula heating wire for use, sticks on the insulating gel mixture on the inwall of insulation cabinet.

The utility model is temperature sensing and temperature-control range to be transferred establish on the 6. pin that resistance is connected in D, thereby has improved the ratio of pressure drag, and the sensitivity of thermostat is brought up to less than ± 0.1 ℃, and temperature-control range can be accomplished below 100 ℃; Because the 2. pin of D is through resistance R 5 ground connection, 6. pin is by capacitor C 3 ground connection, so extraneous clutter and power supply ripple can not be scurried into the D interference sensitivity, and eliminated the generation of high frequency radiation in the D; Because the control signal of heating and cooling indication and electronic switch has guaranteed that with the 3. pin that is taken at D their action is synchronous; Because the characteristic of thyristor, the two-wire electronic switch can adapt to the two-wire switch synchro control of electric network source, also is applicable to the single line switch control of power supply, can also turn-off the induction of electrical appliance phase line thermoelectricity, eliminates live wire electric shock phenomenon and takes place; Because the wiring line-spacing of electric heater has strengthened density, the heat that is produced is concentrated, working current correspondingly obtains reducing, thereby reduced the power consumption of electric heater, improved withstand voltage properties, the power consumption of a double type electric heater only is about 45% of a like product, and only in 3 degree, supply voltage rises to 380V does not have the phenomenon that boiling hot soft heatization is moulded the bag insulation course for incubator cycle power consumption of incubating hundred pieces of eggs; Because the electric blanket electric heater utilizes the double energy of electromagnetic field and thermal field to act on human body, thereby realize the double effects of heating and physiotherapy; Because the primary and secondary of three-dimensional temperature lifting type electric heater compensation wire laying mode, the temperature rise in space is fast and even in the casing.

The utility model is described in further detail below in conjunction with the embodiment of accompanying drawing.

Fig. 1 is automatic temperature control device circuit theory diagrams of the present utility model;

Fig. 2 is an electric blanket electric heater wiring schematic diagram of the present utility model;

Fig. 3 is the wiring schematic diagram of incubator of the present utility model, insulation cabinet electric heater.

Among Fig. 1:

Automatic temperature control device is made of temperature information testing circuit and two-wire electronic switching circuit.

The electronic devices and components of temperature information testing circuit have: D is time base circuit NE555, temperature information sensing resistor R3, select negative tempperature coefficient thermistor commonly used for use, nominal resistance 1K-4.7K, temperature range value point is transferred and is established resistance R 4, selects the small-sized potentiometer of 4.7K for use, R2 ≈ 3K, for the 6. pin of D provides the high level of 2/3Vcc, select the carbon resistance film of W/16 for use, the nominal value of these three resistance is with R2＜(R3+R4)/2 apolegamy.Thermistor places electric heater RB, is welded on the upper end of 6. pin and the potentiometer R4 of D through connecting conducting wire.Be connected in the 6. pin of D and 5. the filter capacitor C3 and the C4 of pin, all select the ceramic disc capacitor of 0.01uf for use.For the 2. pin of D provides≤the low level R5 〉=100K of 1/3Vcc, select the carbon resistance film of W/16 for use.Connect redness on the 3. pin of the D indication H1 that heats up, green cooling indication H2 all selects the light emitting diode of φ 3mm for use, their current-limiting resistance R6 ≈ 3K, and R7 ≈ 2.7K selects the carbon resistance film of W/16 for use.The power transformer T of dc working power circuit, select power consumption 1W for use, the primary coil of T lead-in wire connects with power lead A, B, the two-end part of primary coil winding respectively extraction voltage be 9V～12V tap 1. and 2., the secondary coil output voltage of T is 12V * 2.Full-wave rectification diode V1,2 selects the IN4001 type, and filter capacitor C1,2 selects the electrochemical capacitor of 100uf/16V for use, and resistance R 1 ≈ 100 Ω select the carbon resistance film of W/16 for use.

The electronic devices and components of two-wire electronic switching circuit along with the technical feature difference of electrical appliance, are selected the technical parameter difference of element for use.When electrical appliance RB was the electric heater of pure resistive low-power consumption, the electronic devices and components in the circuit mainly contained: power switch element VQa.b selects the bidirectional thyristor of TAG88 type or BCR1AM600V for use.The Ho of photoelectrical coupler selects red light emitting diodes for use, and current-limiting resistance Ro ≈ 3K is advisable with the working current 〉=4MA that satisfies Ho, and their F end links with the 3. pin of D, and the E end connects with the Vcc anode of temperature information testing circuit.With the homemade general photodiode VBa.b that Ho is installed together side by side, be the light activated switch of control thyristor control utmost point working power.Current limliting step-down coupling capacitance Ca1 ≈ Cb1 〉=0.1uf/250V connects with its corresponding power supply B, A end respectively.Full-wave rectification diode Va1.2 and Vb1.2 all select the IN4004 type for use, voltage stabilizing diode Va3 and Vb2 select the stabilivolt of voltage stabilizing 6V0.5W for use, filter capacitor is selected the electrochemical capacitor of Ca2 ≈ Cb2 〉=4.7uf/25V for use, resistance R a1 ≈ Rb1=100 Ω, current-limiting resistance Ra2 ≈ Rb2=3.9k, all select the carbon resistance film of W/16 for use, they constitute two dc supplies of a.b respectively, supply with the working power of the thyristor VQa and the VQb control utmost point respectively after photodiode VBa and VBb control.The power input of two-wire electronic switch and power lead A, B end link, and output terminal C, D connect with the power lead of electric heater RB.

Among Fig. 2:

RB is the electric blanket electric heater, and the heating wire line hinders 20 Ω/M, and the working current of supply voltage 220V is 180MA～190MA.Power consumption 40W～42W.25cm in the wiring area length be the space-in of two 1cm apart from the district, all the other 15cm and 45cm are the space-out of 2cm apart from the district, width 70cm is a kind of typical types of double type electric blanket electric heater.1. the connecting conducting wire of heating wire is connected to C, D end in the thermostat, and thermistor R3 is sewn between the line of electric heater middle part 2cm line-spacing, and 2. its connecting conducting wire is connected to the 6. pin of D in the thermostat and the upper end of potentiometer R4.

Among Fig. 3:

When RB was the electric heater of incubator, heating wire can be selected ankle formula heating wire for use, and 20 Ω/m～50 Ω/m is preferably selected in the line resistance for use, working current 90mA～150mA, and the desirable bottom surface of wiring line-spacing is 0.5CM 3., and end face is 1CM 4., and the four side face is 2CM 5., and four vertical angles are 0.8CM 6..When RB is the electric heater of insulation cabinet, because of its require that temperature speed is fast, temperature is high 30 ℃～100 ℃, so working current is in 200mA～250mA scope, 1. the connecting conducting wire of heating wire is connected to C, D end in the thermostat, thermistor R3 is fixed between the line of edge surface, and 2. its connecting conducting wire is connected to the 6. pin of D in the thermostat and the upper end of potentiometer R4.

The utility model is work like this.Energized, the 220V power supply enters two-wire electronic switching circuit and power transformer T from A, B end lead, by coupling capacitor Ca1 and Cb1 and rectifying and wave-filtering current limliting mu balanced circuit thereof, supplies with the working power of thyristor VQa and the VQb control utmost point respectively.By the alternating voltage of the secondary coil of T output behind rectifying and wave-filtering, the working power of supplying temperature information detection.Rotate the knob of potentiometer R4, put its resistance in least significant end.When the environment temperature of electric heater RB in the electrical appliance is lower than potentiometer R4 set temperature value, the resistance of thermistor R3 in the RB is bigger, feasible (R3+R4)/2 〉=R2, the 6. pin current potential V of D 6. 〉=2/3Vcc, 3. pin output low level V 3.=0, H2 is by unglazed in the cooling indication, H1 and H0 then conducting simultaneously are luminous, H1 glows and shows intensification, luminous photodiode VBa and the VBb of making of H0 is subjected to photoconduction logical simultaneously, and the thyristor VQa and the VQb control utmost point obtain working power simultaneously and open-minded, and the 220V supply voltage is through thyristor VQa and VQb, from C, electric heater RB working power is supplied with in the output of D end, and RB produces heat and heats up.Along with the temperature in the electrical appliance raises gradually, the resistance of thermistor R3 correspondingly reduces.In electrical appliance temperature rise to be higher than potentiometer R4 set temperature value＜0.1 ℃, the time, the resistance of thermistor R3 is reduced to (R3+R4)/2＜R2, the 6. pin current potential of D drop to V 6.＜2/3Vcc, 3. pin output high level V 3.=1, cooling indication H2 conducting, green glow shows cooling, by unglazed, photodiode VBa and VBb end simultaneously simultaneously for H1 and H0, and the control utmost point power supply of thyristor VQa and VQb is disconnected, VQa and VQb turn-off the power supply of electric heater RB simultaneously, RB can not produce heat, and the interior temperature of electrical appliance can be distributed gradually and be reduced, and the resistance of thermistor R3 correspondingly increases.When decrease of temperature made thermistor R3 resistance increase to (R3+R4)/2 〉=R2, circuit repeated the above-mentioned course of work.If temperature is on the low side or higher in the electrical appliance of thermostat control, the adjustable resistance that increases or adjust and reduce potentiometer R4 gets final product.

RB is the course of work of plane temperature lifting type electric blanket electric heater.After the two-wire electronic switch of thermostat is opened the power supply of RB, electric current flow through RB heating wire and produce electromagnetism and heat, form stronger electromagnetic field and thermal field in two space-ins of RB apart from the district, the double energy of this reinforcement is waist, Zhou He popliteal four positions that are applied to the sleep human body.In the use, the heat of absorption of human body increases gradually, and the cold air in the body little by little reduces, and under the effect of electromagnetic field, heat arrives the position in the body, and the cold air at this position promptly is ejected, and blood circulation is strengthened.The magnetic thermal energy at waist, Zhou, popliteal four positions is along human body both direction development up and down, and the descending De of waist is Yu the up magnetic thermal energy of popliteal portion reaches energy equilibrium after converging.The magnetic thermal energy at waist elbow three positions goes upward to shoulder and converges upwards that the magnetic thermal energy at popliteal position comes downwards to foot, because of the wiring of RB goes up shoulder and ankle is down a radio zone, so, form the release district of chill rheumatism on the shoulder down with ankle, sole is wet gradually to warm refreshing by cold, and head feels relief comfortable gradually, the ruddy gradually gentleness of face.When the sleep temperature rose to set temperature value, the power supply of RB was automatically shut down by thermostat, and electric heater RB is no current both, does not have electromagnetic wave again, does not also have phase line thermoelectricity phenomenon.When the sleep temperature dropped to the temperature value that is lower than setting, thermostat was opened the power supply of electric heater RB again, repeats the above-mentioned course of work.

Claims (4)

1, a kind of automatic temperature control device and electric heater, power transformer is arranged, the lead of joining power, time base circuit D and the temperature information detection of element formation on every side thereof, heating and cooling indication and contactless electronic beam switch circuit, electric heater joining with it, thermistor places between the line of electric heater, it is characterized in that, the thermistor R3 of the temperature information testing circuit of automatic temperature control device, potentiometer R4 and capacitor C 3 are connected on the 6. pin of time base circuit D, the 2. pin connecting resistance R5 of D is to ground, and temperature automatic control signal level is by the 3. pin output of D; The two-wire electronic switch is the combination that two symmetrical and independent single line electronic switches are arranged, joining light emitting diode Ho is combined into photoelectrical coupler with photosensitive diode VBa and VBb with the 3. pin of D, the working power of the power switch element thyristor VQa and the VQb control utmost point, take from power end corresponding with it by Ca1 and Cb1 respectively, phase line of power and zero line link with electric heater RB after the control of two-wire electronic switch; Electric heater comprises the electric heater of electric blanket, incubator and insulation cabinet, and heating wire wiring line-spacing preferably is controlled at 01.CM～2CM scope, and working current should be selected in the 250mA; When RB was the electric blanket electric heater of plane temperature lifting type, heating wire separated regions ground density distributed, and space-in acts on the waist elbow and the popliteal two Qu Si positions of human body apart from being preferably between 0.7CM～1.5CM with the double energy of current collection magnetic field and thermal field; When RB is the electric heater of three-dimensional temperature lifting type, heating wire distributes and is attached on the internal face of casing, the bottom surface wiring line-spacing of main heating can be selected in 0.1CM～1CM scope, wiring line-spacing ratio should be got 1: 2: 2: 0.4CM, the line-spacing of incubator electric heater is the main end, secondary top, mends limit, strong four jiaos than order, and the line-spacing of insulation cabinet electric heater is the main end, secondary, benefit top, strong four jiaos than order.

2, according to described automatic temperature control device of claim 1 and electric heater, the working power circuit that it is characterized in that the two-wire electronic switch thyristor control utmost point is respectively by capacitor C a1.2, diode Va1-3, resistance R a1.2 and capacitor C b1.2, diode Vb1-3, resistance R b1.2 constitutes.

3, according to described automatic temperature control device of claim 1 and electric heater, the working power that it is characterized in that the two-wire electronic switch thyristor control utmost point, can by diode Va1, capacitor C a2, resistance R a2 and diode Vb1, capacitor C b2, resistance R b2 respectively from the primary coil tap of power transformer T 1. and 2. end obtain, the tap voltage V of T 1. ≈ V 2.=9V～12V.

4, according to described automatic temperature control device of claim 1 and electric heater, it is characterized in that wiring space-out that the electric blanket electric heater mainly adopts is apart from 2CM, wiring area length 125CM, the middle part is routed to the space-out of 45CM length apart from the district, is close to its two ends and respectively connects up the space-in of 25CM length apart from the district.

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