CN101583917A - Magnetic field-free phase control-type temperature control circuit and method - Google Patents
Magnetic field-free phase control-type temperature control circuit and method Download PDFInfo
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- CN101583917A CN101583917A CNA2008800023754A CN200880002375A CN101583917A CN 101583917 A CN101583917 A CN 101583917A CN A2008800023754 A CNA2008800023754 A CN A2008800023754A CN 200880002375 A CN200880002375 A CN 200880002375A CN 101583917 A CN101583917 A CN 101583917A
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Abstract
A magnetic field-free phase control-type temperature control circuit is disclosed. The magnetic field-free phase control-type temperature control circuit is connected to a heating cable. The heating cable includes first, second, and third wires arranged in parallel with each other, and is configured such that the first wire is used to detect temperature, the second wire and the third wire are connected at the first ends thereof, and current enters through the second wire, makes a U-turn at the first ends thereof, and then exits through the third wire. A temperature signal voltage supply control unit controls the supply of temperature signal voltage. A phase control unit controls the output of the current flowing through the first wire using a phase control method based on a set holding current. A trigger generation unit outputs a trigger signal based on output from the phase control unit.
Description
Technical field
Relate generally to of the present invention is used for the no electromagnetic wave temperature-control circuit and the method for the heating cables of bedding, it can be in the mode in no electromagnetic wave and no magnetic field, to such as electric blanket, the heating cables that uses in the firing equipment of electric heating floor or electric heating coating apparatus or the warmer is carried out heating and temperature detection, and more particularly, relate to such phase control-type temperature control circuit and method, it can detect by inner occur overheated of three line style heating cables and cause, the impedance variation of negative temperature coefficient (NTC) thermistor, and utilize phase control method to regulate the supply of heating current.
Background technology
Condition (as temperature and humidity) around the bed is the key factor of the human sleep of influence.For the temperature that makes bed keeps suitably, many families use electric heating bed Bed linens and heating arrangement (as electric blanket, electric heating floor or electric heating coating apparatus) widely, and warmer.Such electrical heating bed accessory and warmer comprise heating cables in inside, make that when when heating cables is powered, heating cables produces heat.Correspondingly, detection heating cables temperature on every side and the temperature-control circuit of powering are provided based on the temperature control of this detection.
Such prior art heating cables, temperature-control circuit and method are used independent temperature sensor, come detected temperatures or overheated to utilize temperature sensor, and the supply of control heating current.Because in the conventional method, positive temperature coefficient (PTC) (PTC) temperature sensor is used as temperature sensor, therefore have such problem: need be used to amplify a large amount of circuit and the assembly of PTC temperature sensor, consequently production cost increases, and makes failure rate increase along with the increase of component count.
Summary of the invention
Technical matters
Therefore, consider the above problem that occurs in the prior art and make the present invention, and one object of the present invention is to provide a kind of temperature-control circuit and method, wherein between three heating wires, use the NTC thermistor and substitute the PTC temperature sensor, realize not having magnetic field by making electric current flow with relative direction in two respective wire that are used for carrying out heating, the quantity of assembly that is used for forming circuit is little, connected the low phased circuit of failure rate, used simple structure alternately to switch thus to be used to and carry out that temperature detection is handled and the electric current of heat treated mobile.
Technical scheme
To achieve these goals, the invention provides a kind of magnetic field-free phase control-type temperature control circuit that is connected to heating cables, described heating cables comprises first lead of parallel setting, second lead and privates, and be configured to make described first lead to be used for detected temperatures, described second lead is connected at its first end with described privates, and electric current enters described second lead, first make a clean sweep of head back and flow out at it by privates, described magnetic field-free phase control-type temperature control circuit comprises: temperature signal voltage supply control module, and it is used to control the supply of temperature signal voltage; Phase control unit, it is used for using phase control method control to flow through the output of the electric current of described first lead based on setting holding current; And the triggering generating unit, it is used for exporting trigger pip based on the output from described phase control unit.
A kind of magnetic field-free phase control-type temperature control circuit that is connected to heating cables, described heating cables comprises first lead and second lead of parallel setting, and be configured to make described first lead to be used for detected temperatures and be connected to described second lead at its first end, and electric current enter described first lead and second lead one of them, first make a clean sweep of head back and flow out at it from another lead, described magnetic field-free phase control-type temperature control circuit comprises: temperature signal voltage supply control module, and it is used to control the supply of temperature signal voltage; Phase control unit, it is used for using phase control method control to flow through the output of the electric current of described first lead based on setting holding current; And the triggering generating unit, it is used for exporting trigger pip based on the output from described phase control unit.
Described temperature signal voltage supply control module is connected between power supply and described first lead.
Described phase control unit comprises diac.
Described phase control unit comprises voltage adjustment diode.
Described phase control unit also comprises the capacitor that is connected in parallel between described first lead and described second lead.
Between described second lead and described privates, be provided with reverse overcurrent protection diode in parallel.
Negative temperature coefficient (NTC) thermistor that use is arranged between described first lead, described second lead and the described privates connects described first lead, described second lead and described privates.
Described NTC thermistor is when being joined to one another described first lead, second lead and privates, be arranged between the vertex of a triangle, each sectional position that described triangle utilizes described first lead, described second lead and described privates as the summit, be connected each summit and form.
During described second lead and described privates are wrapped in one deck when being separated from each other with predetermined space.
One or more of described second lead and described privates is by one or more insulator or the sealing of one or more NTC thermistor.
One of them is used as shielding described first lead and described privates.
Lead as shielding forms with form of film, and is positioned at the outside of two leads in addition.
Described first lead is used as shielding, and has only the end as first lead that shields to be connected to power supply.
A kind of magnetic field-free phase control-type temperature-controlled process that is used for temperature-control circuit, described temperature-control circuit is connected to heating cables, described heating cables comprises first lead of parallel setting, second lead and privates, and wherein said first lead is used for detected temperatures, described second lead is connected at its first end with described privates, and electric current enters described second lead, first make a clean sweep of head back and flow out at it by described privates, described temperature-control circuit comprises: temperature signal voltage supply control module, and it is used to control the supply of temperature signal voltage; Phase control unit, it is used for based on the benchmark of setting holding current, uses phase control method control to flow through the output of the electric current of described first lead; And triggering generating unit, it is used for exporting trigger pip based on the output from described phase control unit, described first lead, described second lead and described privates are connected by the NTC thermistor that is arranged on therebetween, described magnetic field-free phase control-type temperature-controlled process comprises: from the temperature detection step of the temperature signal voltage of power supply, to described phase control unit input current value, enter described first lead simultaneously,, flow out then by described second lead and described privates; And heating controlled step, if described triggering generating unit applies heating current under the control of described phase control unit, then apply heating current to described second lead and described privates, if and described triggering generating unit does not apply heating current, then do not apply heating current to described second lead and described privates.
Described temperature detection step is configured to: if appearance is overheated between described first lead, described second lead and described privates, then the impedance of each NTC thermistor reduces, and the temperature signal voltage by the NTC thermistor reduces, and makes described phase control unit reduce the conductivity of electric current by phase control.
Described heating controlled step is configured to: if the electric current that is input to described triggering generating unit from described phase control unit is lower than scheduled current, then described triggering generating unit non-conducting electric current.
Advantageous effects
The present invention has such advantage: can use simple structure, alternately switch flowing of the electric current be used to carry out temperature detection process and heating process, modular construction is simple, and can reduce production cost and time.
The present invention has such advantage: use the NTC thermistor and substitute the PTC temperature sensor between three heating wires, consequently number of components reduces, and makes that the required production cost of temperature-control circuit is low, and has reduced failure rate.
The present invention has such advantage: when local overheating occurring, use phased circuit easily to control the supply of heating current.
The present invention has such advantage: one of three leads of heating cables are carried out the function of shielding, make that intercepting electric field fully leaks, and reduced the quantity that connects, consequently, the quantity of the terminal that connects between heating cables and temperature-control circuit can be reduced to minimum three, makes because the minimizing of coupling part quantity can easily be produced and assemble, and because the minimizing that lead uses can reduce cost.
Description of drawings
According to the detailed description of carrying out below in conjunction with accompanying drawing, can more be expressly understood above-mentioned and other purposes, feature and other advantages of the present invention, in the accompanying drawing:
Fig. 1 illustrates the circuit diagram that is not phase control-type temperature control circuit no magnetic field, that be used for general heating cables;
Fig. 2 is the circuit diagram that illustrates according to phase control-type temperature control circuit of the present invention;
Fig. 3 is the circuit diagram that the embodiment of an end that only connects first lead is shown according to the present invention;
Fig. 4 A illustrates by being connected to the figure of the three line style heating cables that temperature-control circuit of the present invention uses;
Fig. 6 and 7 illustrates to use temperature-control circuit of the present invention to come the circuit diagram of the working condition of detected temperatures;
Fig. 8 is the circuit diagram that the working condition of the heating current that flows through temperature-control circuit of the present invention is shown;
Fig. 9 and 10 illustrates to use first lead and the privates circuit diagram as an embodiment of shielding respectively; And
Figure 11 is the figure that the details of general phase control method is shown.
Embodiment
Describe configuration of the present invention in detail hereinafter with reference to the embodiment of configuration of the present invention shown in the drawings.
Alternating current has 360 ° phase place, and its voltage changes along with phase place.Along with the phasing degree from 0 ° of increase, the voltage with zero potential raises gradually, and at place, 90 ° phasing degree indication maximum voltage.After this, voltage reduces gradually, indicates zero potential at 180 ° place, phasing degree then.After this, voltage has negative potential.Negative minimum voltage appears at 270 ° place, phasing degree.Zero potential is recovered at place, phasing degree at 360 °.
Phase control means that the scrambling of the voltage that use changed along with the time is controlled at the method for output of the potential value at phasing degree, particular point in time place,, utilizes the method for the fact that output voltage changes according to controlling value that is.Phase control method itself is general known technology.
With reference to Figure 11, adjusting based on the resistance of variohm 11, when the resistance of variohm 11 is high, triggering electromotive force slowly raises, when triggering electromotive force, export heating current then corresponding to 140 ° of phase places (example), that is, in 140 ° to 180 ° short time, export heating current, shown in Figure 11 (a).When the resistance of variohm 11 during corresponding to intermediate degree, trigger electromotive force and raises relatively apace, export heating current during corresponding to 90 ° of phase places (example) when the triggering electromotive force then, shown in Figure 11 (b).When the resistance of variohm 11 hangs down, when triggering electromotive force, export heating current for a long time, shown in Figure 11 (c) corresponding to 20 ° of phase places (example).As mentioned above, carry out the feasible method of the potential value at the phasing degree of triggering electromotive force output particular point in time place of utilizing of control and be called as phase control method.
The invention is characterized in, use to minimize and dispose phase control method with simple circuit.
Fig. 1 be illustrate be not no magnetic field, for the circuit diagram of the phase control-type temperature control circuit of general heating cables.With reference to Fig. 1, heating cables 20 comprises first lead 21, second lead 22 and the NTC thermistor 24 that connects betwixt.Fuse (not shown) and power switch (not shown) all are connected to power supply, and temperature signal voltage supply control module 100 is connected in parallel with power supply with triggering generating unit 300.
Triggering generating unit 300 is connected by control fairing 15 at its first end with first lead 21.Usually use thyristor (SCR) as control fairing 15.
One end of first lead 21 is connected to the temperature signal voltage supply control module 100 of temperature-control circuit, and its other end is connected to phase control unit 200.Temperature signal voltage supply control module 100 comprises variohm 11, and the diac 13 that phase-controlled power 200 comprises and first lead 21 is connected in series, the capacitor 12 and the resistor 14 that are connected in parallel between first lead 21 and second lead 22.Reverse overcurrent protection diode 18 is connected to the two ends of second lead 22, and phase control unit 200 is connected to the control fairing 15 that triggers generating unit 300.
In addition, if phase control unit 200 working voltages are regulated the rear end that the Zener diode (not shown) is connected to first lead 21, the variation of then exporting the NTC value.Yet when also providing constant-voltage diode, the NTC value that is lower than constant voltage values is " 0 ", and the variation of the NTC value on the constant voltage values only occurs.In this circuit, need constant-voltage diode, so that with NTC value and constant voltage relatively, and the value that will be higher than this constant voltage is read as " high (HIGH) ", and the value that will be lower than this constant voltage is read as " low (LOW) ".
Although heating cables shown in Figure 1 20 is not realized no magnetic field environment, heating cables 20 comprises the NTC thermistor 24 between first lead 21 and second lead 22, and wherein resistance raises with temperature and reduces.When second lead, 22 local overheatings, or when causing first lead 21 and 22 short circuits of second lead because NTC thermistor 24 damages, temperature reaches the predetermined temperature point of adjustment, and the resistance value of NTC thermistor 24 reduces fast, makes phase control unit 200 carry out control to increase the phased time.That is, the impedance step-down of NTC thermistor 24, and on NTC thermistor 24, produce voltage, and turn back, make signal voltage not arrive phase control unit 200, or voltage is reduced the back transmission.
In the case, control fairing (SCR) 15 cuts out, the feasible supply that does not generate trigger pip and stop heating current.Describe this process in detail with reference to comprising according to the accompanying drawing of no magnetic field heating cable of the present invention.
Fig. 2 is the circuit diagram that illustrates according to phase control-type temperature control circuit of the present invention.With reference to Fig. 2, although structure almost with Fig. 1 in identical, heating cables 20 comprises first lead 21, second lead 22 and privates 23.Here, first lead 21 is used for detected temperatures, and second lead 22 and privates 23 are generally used for carrying out heating.Reverse overcurrent protection diode 18 is connected in parallel between second lead 22 and the privates 23.Second lead 22 is connected at its first end place with privates 23, and heating current enters second lead 22, outflow privates 23 after turning around.
The outside at each lead forms coating and shielding.If desired, can increase or reduce the quantity of shielding and coating.Second lead 22 is connected in its back-end with privates 23.When heating current is input to second lead 22, is constructed such that heating current flows out from privates 23, or flows through privates 23 in opposite direction.
When heating second lead and privates, the AC impedance of the NTC1 thermistor between first lead 21 and second lead 22 and the AC impedance of the NTC2 thermistor between first lead 21 and the privates 23 reduce.The temperature signal alternating current flow valuve that flows through NTC1 and NTC2 thermistor reduces pro rata, make win between the lead and second lead and first and privates between ac voltage be similar to current value and reduce pro rata, thereby based on selection between first lead 21 and second lead 22 or the selection output temperature signal voltage between first lead 21 and the privates 23.The form output output temperature signal value of the value that obtains when being connected in parallel with NTC1 thermistor and NTC2 thermistor.
In the case, when corresponding to the arbitrary portion local overheating of the whole heating cables 10 of total length, that is, when the excessive temperature of this part raise, excessively the temperature signal voltage that raises also can occur with the output temperature signal value.As a result, the excessive rising temperature value of the medial temperature changing value of heating cables 10 and heating cables 10 is exported simultaneously.Therefore, when utilizing the power consumption of temperature value control heating cables 10, can realize having moved the temperature controller of the device that prevents that excessive temperature from raising, thereby have such advantage: the independent temperature sensor or the bimetallic devices that do not need to be used to prevent the excessive temperature rising.
Control based on phase control unit 200, if a sinusoidal wave part satisfies predetermined benchmark, then electric current is through triggering the quantity of electric charge control resistor 16 of generating unit 300, utilize this electric current to capacitor 17 chargings then, make based on the control of control fairing 15, the electric current that charges in the capacitor is provided as heating current.
Simultaneously, different with accompanying drawing, trigger generating unit 300 and control fairing 15 can be arranged near power supply, that is, and along the direction identical with temperature signal voltage supply control module 100.The difference of the structure between the circuit of Fig. 1 and 2 is, when first lead or the privates electric field shielding rate during as shielding line.When realizing described structure, as shown in Figure 2, the electric field shielding rate is low, and when when equidirectional is provided with, can improve the electric field shielding rate.For example, when privates 23 during, be difficult to intercept fully electric field as the shielding line in the circuit structure of Fig. 2.When the length of heating cables in short-term, shielding rate is very high, and when its length increases, heating current flows through the two ends of privates 23, make and voltage V=I * R * 1.4 (peak values of ac) occur, be directly proportional with heating current with as the internal resistance of the privates 23 of shielding line, so shielding rate can be reduced to 50% or littler.
Under the situation of the circuit structure that is provided with along equidirectional, when first lead 21 ground connection and when working as shielding line the time, the electric current that flows through first lead 21 only is the temperature detection electric current, and it is reduced to 1mA or littler.As a result, the electromotive force between the two ends of first lead 11 is approximately 0V, and ignores the temperature detection electric current, thereby electric field 100% can be intercepted fully.
That is, whether electric field shielding efficient can flow through the shielding line difference because of heating current.Certainly, although there is this difference, in two circuit, be identical such as the feature operation of temperature detection, heating operation and heating sequence.
Simultaneously, capacitor 18 plays when 15 short circuits of control fairing and makes short-circuit current can flow to the effect of the main fuse and the fuse of cutting off the electricity supply.
Fig. 3 is the circuit diagram that an embodiment of an end that only connects first lead is shown according to the present invention.With reference to Fig. 3, can be provided with, make and have only an end that is connected to the power supply or second lead 11 as an end of first lead 11 that shields, and do not connect in other parts of first lead 11.In the case, because the quantity that respectively is connected the connector 30 between heater wire and the temperature-control circuit can be reduced to minimum three, so the quantity of coupling part reduces, and makes and produces easily and assemble.In addition, can reduce the use of lead, the advantage of economic benefit (that is, reducing cost) is arranged.
Fig. 4 A is the figure that the three line style heating cables that are connected to temperature-control circuit of the present invention are shown to 4E.With reference to Fig. 4 A to 4E, in Fig. 4 A, heart yearn (core thread) 21a that is made by synthetic resin is arranged on the center, first lead, 21 spiralitys are around heart yearn 21a, NTC thermistor 24 is looped around the periphery of first lead 21, and second lead 22 and privates 23 spiralitys are around the periphery of NTC thermistor 24, and the predetermined space that separates each other.In the prior art, therefore exploitation coiling technology not fully is difficult to when allowing each lead to separate each other two arrangements of conductors on one deck, as shown in the figure.Yet, recently, owing to improved the coiling technology, can two leads be arranged on on one deck, thereby obtain the advantage that the thickness such as heating cables reduces by accurately regulating the interval that each lead separates each other.
Fig. 4 B illustrates an embodiment who does not use heart yearn 21a and be provided with center first lead 21.In addition, when the insulation course of making by enamel or synthetic resin 25 be looped around one of second lead 22 and privates 23 (in this accompanying drawing for privates) around the time, can prevent between first lead, second lead 22 and privates 23, to be short-circuited.
Fig. 4 C illustrates the embodiment that utilizes corresponding NTC thermistor 24 to twine first lead 21, the parallel heating cables that is provided with of second lead 22 and privates 23 backs respectively.
Fig. 4 D illustrates privates 23 as the membrane shield around the outside, and Fig. 4 E illustrates first lead 21 as the membrane shield around the outside.Here, outside coating 25 can use NTC thermistor or insulating material.
That is, first lead 21 or privates 23 can be used as shielding line.Privates 23 can be the shielding line as the structure among Fig. 2, and first lead 21 can be a shielding line in the above-described embodiments, and wherein the front end in heating wires is provided with triggering generating unit 300.Front end in heating wires is provided with among the embodiment that triggers generating unit 300, if privates 23, then can be carried out no magnetic field heating operation as shielding line, but can not electric field shielding.If second lead 22 as shielding line, can obtain with Fig. 2 in identical electric field shielding rate.
Fig. 5 A is the view that the cross section of the heating cables that is connected to temperature-control circuit of the present invention is shown to 5E.With reference to Fig. 5, can know that first lead 21, second lead 22 and privates 23 are arranged in triangular structure.
Fig. 5 A illustrates the cross section of the heating cables of Fig. 3 A.In triangular structure, first lead 21 is arranged on the inboard of NTC thermistor 24, and second lead 22 and privates 23 are arranged in the outside of NTC thermistor.The NTC thermistor connects first, second and privates, makes the lead 21 of winning can detect the variation of resistance value.In order to prevent to cause second lead 22 and privates 23 short circuits owing to production fault or damage, second lead 22 or privates 23 can be coated with insulation course.
Fig. 5 B illustrates the part from the heating cables of Fig. 3 B, and identical among its working condition and structure and Fig. 5 A.
Fig. 5 C illustrates the cross section of heating cables of Fig. 3 C and the method for using each lead in NTC thermistor 24 sealing first lead 21, second lead 22 and the privates 23.In the case, each lead possibility of short circuit each other is low, and each lead forms triangular structure, and NTC thermistor 24 is positioned at triangular structure inside.
First lead 21 can utilize the NTC thermistor 24 that is connected to determine whether to occur overheated or short circuit.
If privates 23 is coated with insulating coating, then only detect the change in impedance value of the NTC1 thermistor between first lead 21 and second lead 22.Because far below the impedance of NTC thermistor, therefore regarding them as, the internal resistance value of each lead is approximately " 0 ".Because each end of second lead 22 and privates 23 is connected to each other, so NTC1 thermistor and NTC2 thermistor are used as parts in parallel.
Simultaneously, shown in Fig. 5 D, can be provided with, make privates 23 as shielding line, so that seal second lead 22 and first lead 21.Shown in Fig. 5 E, can be provided with, make the lead 21 of winning as shielding line, so that seal second lead 22 and privates 23.Sealed outside and mains side ground connection owing to be used to carry out first lead of function of shielding, therefore first lead plays and makes the electric charge that leaks into the outside and the effect of formed electric field ground connection, thereby eliminates electric charge and electric field.The shape of heating cables can use first lead 21 as shown in Figure 9 to express as the circuit of shielding line as the circuit and the privates as shown in figure 10 23 of shielding line.
Fig. 6 and 7 illustrates to use temperature-control circuit of the present invention to come the circuit diagram of the working condition of detected temperatures.Fig. 8 is the circuit diagram that the working condition of the heating current that flows through temperature-control circuit of the present invention is shown.With reference to Fig. 6,, during being used for just (+) semiperiod of detected temperatures, will compare by temperature signal voltage and the reference voltage that first lead 21 detects based on the reference voltage that is provided with by temperature signal voltage supply control module 100.Be suitable for reference voltage if determine the temperature signal voltage that detects, then the diac 13 of phase control unit 200 is opened the control fairing 15 that triggers generating unit 30.When control fairing (SCR) 15 was opened, electric current was to capacitor 12 chargings.Fig. 7 is the circuit diagram that flows that illustrates according to the electric current of embodiment as the circuit of Fig. 3 as shown in, and identical in the circuit such as the mobile working condition of electric current and Fig. 6.
With reference to Fig. 8, when having finished the temperature detection operation during just (+) semiperiod at power supply, during negative (-) semiperiod subsequently, carry out heating operation.If charge stored triggers the grid of control fairing 15 in the capacitor 12 of phase control unit 200, and open control fairing 15, then electric current " i (h) " guiding second lead 22 flows out from privates 23 after turning around, and with no magnetic approach heating cables 20 is carried out heating thus.
Heating cables is compared with reference temperature under the overheated situation when detected temperatures, and the impedance step-down of NTC thermistor 24 makes the temperature detection voltage step-down.Because temperature detection voltage is low, so the phased time is elongated, makes SCR 15 close and does not export trigger pip.Simultaneously, because the charging of capacitor 12 is delayed (phase delay), so diac 13 can not be connected to trigger voltage the grid of SCR 15 with the electromotive force that is lower than reference value.At last, based on the adjusting of carrying out by temperature signal voltage supply control module 11, diac 13 be in control that the impedance owing to NTC thermistor 24 reduces and the control that postpones owing to the charging of capacitor 12 under.
If disconnect NTC thermistor 24, then intercept from capacitor 12 be used to charge and the voltage supply of discharge current, make diac (diac (diac)) 13 can not trigger control fairing 15, stop heating thus.In addition, be shorted under the situation of second lead 22 and privates 23 at first lead 21 that is used to detect NTC thermistor 24, and under the situation that the resistance value of and NTC thermistor 24 overheated at arbitrary portion reduces rapidly, intercept the voltage supply of self-charging and discharging capacitor 12, make diac 13 not open control fairing 15.Therefore, owing to there is not heating current to flow, therefore can regulates overheated and open circuit.
Simultaneously; second lead 22 and privates 23 are connected in series; flow out by the U point after making electric current turn around; its first end that is connected in series is connected to the negative electrode of control fairing 15; make and be used for power supply is carried out the half-wave current series flow that heats; and reverse overcurrent protection diode 18 is provided, makes that electric current overflows and the auto power off fuse when 15 short circuits of control fairing.
Claims (17)
1. magnetic field-free phase control-type temperature control circuit that is connected to heating cables, described heating cables comprises first lead, second lead and the privates of parallel setting, and be configured to make described first lead to be used for detected temperatures, described second lead is connected at its first end with described privates, and electric current enters described second lead, first make a clean sweep of head back and flow out by privates at it, described magnetic field-free phase control-type temperature control circuit comprises:
Temperature signal voltage supply control module, it is used to control the supply of temperature signal voltage;
Phase control unit, it is used for using phase control method control to flow through the output of the electric current of described first lead based on setting holding current; And
Trigger generating unit, it is used for exporting trigger pip based on the output from described phase control unit.
2. magnetic field-free phase control-type temperature control circuit that is connected to heating cables, described heating cables comprises first lead and second lead of parallel setting, and be configured to make described first lead to be used for detected temperatures and be connected to described second lead at its first end, and electric current enter described first lead and second lead one of them, first make a clean sweep of head back and flow out from another lead at it, the phase control-type temperature control circuit in described no magnetic field comprises:
Temperature signal voltage supply control module, it is used to control the supply of temperature signal voltage;
Phase control unit, it is used for using phase control method control to flow through the output of the electric current of described first lead based on setting holding current; And
Trigger generating unit, it is used for exporting trigger pip based on the output from described phase control unit.
3. magnetic field-free phase control-type temperature control circuit according to claim 1 and 2, wherein said temperature signal voltage supply control module is connected between power supply and described first lead.
4. magnetic field-free phase control-type temperature control circuit according to claim 1, wherein said phase control unit comprises diac.
5. magnetic field-free phase control-type temperature control circuit according to claim 1, wherein said phase control unit comprises voltage adjustment diode.
6. according to claim 4 or 5 described magnetic field-free phase control-type temperature control circuits, wherein said phase control unit also comprises the capacitor that is connected in parallel between described first lead and described second lead.
7. magnetic field-free phase control-type temperature control circuit according to claim 1 wherein is provided with reverse overcurrent protection diode in parallel between described second lead and described privates.
8. magnetic field-free phase control-type temperature control circuit according to claim 1 wherein uses negative temperature coefficient (NTC) thermistor that is arranged between described first lead, described second lead and the described privates to connect described first lead, described second lead and described privates.
9. magnetic field-free phase control-type temperature control circuit according to claim 8, wherein said NTC thermistor is when being joined to one another described first lead, second lead and privates, be arranged between the vertex of a triangle, each sectional position that described triangle utilizes described first lead, described second lead and described privates as the summit, be connected each summit and form.
10. magnetic field-free phase control-type temperature control circuit according to claim 1 is during wherein said second lead and described privates are wrapped in one deck when being separated from each other with predetermined space.
11. magnetic field-free phase control-type temperature control circuit according to claim 10, one or more of wherein said second lead and described privates is by one or more insulator or the sealing of one or more NTC thermistor.
12. magnetic field-free phase control-type temperature control circuit according to claim 1, one of them is used as shielding wherein said first lead and described privates.
13. magnetic field-free phase control-type temperature control circuit according to claim 11, wherein the lead as shielding forms form of film, and is positioned at the outside of two leads in addition.
14. magnetic field-free phase control-type temperature control circuit according to claim 1, wherein said first lead is used as shielding, and has only the end as first lead that shields to be connected to power supply.
15. magnetic field-free phase control-type temperature-controlled process that is used for temperature-control circuit, described temperature-control circuit is connected to heating cables, described heating cables comprises first lead of parallel setting, second lead and privates, and wherein said first lead is used for detected temperatures, described second lead is connected at its first end with described privates, and electric current enters described second lead, first make a clean sweep of head back and flow out at it by described privates, described temperature-control circuit comprises: temperature signal voltage supply control module, and it is used to control the supply of temperature signal voltage; Phase control unit, it is used for based on the benchmark of setting holding current, uses phase control method control to flow through the output of the electric current of described first lead; And triggering generating unit, it is used for exporting trigger pip based on the output from described phase control unit, described first lead, described second lead and described privates are connected by the NTC thermistor that is arranged on therebetween, and described magnetic field-free phase control-type temperature-controlled process comprises:
The temperature detection step enters described first lead from the temperature signal voltage of power supply, by described second lead and described privates, flows out then, simultaneously to described phase control unit input current value; And
The heating controlled step, if described triggering generating unit applies heating current under the control of described phase control unit, then apply heating current to described second lead and described privates, if and described triggering generating unit does not apply heating current, then do not apply heating current to described second lead and described privates.
16. magnetic field-free phase control-type temperature-controlled process according to claim 15, wherein said temperature detection step is configured to: if appearance is overheated between described first lead, described second lead and described privates, then the impedance of each NTC thermistor reduces, and the temperature signal voltage by the NTC thermistor reduces, and makes described phase control unit reduce the conductivity of electric current by phase control.
17. magnetic field-free phase control-type temperature-controlled process according to claim 15, wherein said heating controlled step is configured to: if the electric current that is input to described triggering generating unit from described phase control unit is lower than scheduled current, then described triggering generating unit non-conducting electric current.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20070104949 | 2007-10-18 | ||
| KR1020070104949 | 2007-10-18 | ||
| KR1020080043847 | 2008-05-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101583917A true CN101583917A (en) | 2009-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008800023754A Pending CN101583917A (en) | 2007-10-18 | 2008-07-08 | Magnetic field-free phase control-type temperature control circuit and method |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100886978B1 (en) |
| CN (1) | CN101583917A (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200276482Y1 (en) | 2001-12-27 | 2002-05-24 | 길종진 | Temperature detector using non-magnetic field heating wire |
| KR200277717Y1 (en) | 2002-03-16 | 2002-06-07 | 길종진 | Temperature regulator for preventing heating wire from over-heating and preventing magnetic field from radiating of heating wire in bedding |
| KR200290027Y1 (en) | 2002-06-27 | 2002-09-27 | 길종진 | Temperature controller of bedding using non-magnetic field heating wire capable of detecting temperature |
| KR200420617Y1 (en) | 2006-04-26 | 2006-07-04 | 박준모 | The thermostat of the 5th binary term of the sexagenary cycle sum way that used the generation of heat line |
-
2008
- 2008-05-13 KR KR1020080043847A patent/KR100886978B1/en not_active IP Right Cessation
- 2008-07-08 CN CNA2008800023754A patent/CN101583917A/en active Pending
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|---|---|
| KR100886978B1 (en) | 2009-03-04 |
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Open date: 20091118 |