CN103197711B - Negative temperature coefficient (NTC) single temperature control circuit and temperature control method thereof - Google Patents
Negative temperature coefficient (NTC) single temperature control circuit and temperature control method thereof Download PDFInfo
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- CN103197711B CN103197711B CN201310063931.1A CN201310063931A CN103197711B CN 103197711 B CN103197711 B CN 103197711B CN 201310063931 A CN201310063931 A CN 201310063931A CN 103197711 B CN103197711 B CN 103197711B
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- 238000000034 method Methods 0.000 title abstract description 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 41
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 41
- 239000010703 silicon Substances 0.000 claims abstract description 41
- 238000012545 processing Methods 0.000 claims abstract description 25
- 230000006698 induction Effects 0.000 claims abstract description 23
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 230000001360 synchronised effect Effects 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 230000009467 reduction Effects 0.000 claims description 10
- 230000008859 change Effects 0.000 abstract description 6
- 230000001681 protective effect Effects 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 8
- 230000000087 stabilizing effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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Abstract
The invention discloses a negative temperature coefficient (NTC) single temperature control circuit and a temperature control method thereof. The NTC single temperature control circuit comprises a heating element and a controller, wherein the heating element comprises an induction line, an NTC layer and a hot wire, the controller comprises fuses, a resistance capacitance step-down circuit, an indicator light circuit, a power source voltage detection circuit, a synchronous signal circuit, a first voltage detection circuit, a load detection circuit, protective controlled silicon, operating controlled silicon, an operating controlled silicon short-circuit detection circuit and a central processing unit, wherein the operating controlled silicon is used for controlling the hot wire, and the first voltage detection circuit is used for receiving the temperature change of the NTC layer and detecting whether short circuit happens on the induction line or not at the same time. According to the NTC single temperature control circuit and the temperature control method thereof, the operating controlled silicon is matched with the protective controlled silicon, after the operating controlled silicon is out of control, the protective controlled silicon can cut off a power source in time, detects the working conditions of the NTC hot wire and the line of induction synchronously, and fault detection capability is stronger.
Description
Technical field
The present invention relates to technical field of temperature control, particularly a kind of NTC single control circuit temperature and temperature control method thereof.
Background technology
The temperature-control circuit cardinal principle of prior art is the break-make of the switch of control temperature, this temperature-control circuit principle is simple, but in fault detect, there is obvious deficiency, and the switch of control temperature is often on off operating mode, therefore unavoidably can be out of control, and the temperature-control circuit of prior art does not focus on switch detection out of control, causes product to be heated always, until line with heating function burns out, cause unnecessary casualties and property loss.
Summary of the invention
(1) technical matters that will solve
Object of the present invention is exactly to overcome the shortcoming that switch detection out of control do not focused on by said temperature control circuit, aims to provide a kind of NTC(negative temperature coefficient strengthening fault-detecting ability) single control circuit temperature and temperature control method thereof.
(2) technical scheme
For achieving the above object, NTC single control circuit temperature of the present invention, comprise heater and controller, described heater comprises the line of induction, NTC layer and line with heating function, described controller comprises fuse, capacitance-resistance voltage reduction circuit, indicator light circuit, voltage detection circuit, synchronous signal circuit, first voltage detecting circuit, load detecting circuit, protection controllable silicon, work controllable silicon, work controllable silicon short-circuit detecting circuit and central processing unit, described fuse connects described capacitance-resistance voltage reduction circuit simultaneously, described voltage detection circuit, described synchronous signal circuit, described protection controllable silicon and described work controllable silicon short-circuit detecting circuit, described capacitance-resistance voltage reduction circuit, described indicator light circuit, described voltage detection circuit is connected central processing unit with described synchronous signal circuit, and described central processing unit is used for Control protection controllable silicon, first voltage detecting circuit, load detecting circuit and work controllable silicon, described work controllable silicon is for controlling line with heating function, and described first voltage detecting circuit, for receiving NTC layer temperature variation, detects the whether short circuit of the described line of induction simultaneously.
Further, described line of induction two ends arrange the second voltage detecting circuit.
Further, described central processing unit is by detecting described first voltage detecting circuit and described second voltage detecting circuit both end voltage ratio judges line of induction disconnection.
The present invention also provides a kind of NTC single control circuit temperature and temperature control method thereof, comprises the following steps:
Carry out program initialization;
Carry out fault detect, the whether short circuit of testing controllable silicon, in this way, then closes output, as no, then protects controllable silicon work, fuse wire;
Judge whether timing arrives, and if so, then closes output;
Judge whether preheating, if so, then NTC preheat temperature value compares in preheating operation parameter and central processing unit, and if not, then in normal operational parameters and central processing unit, NTC temperature value contrasts;
Above-mentioned pre-thermal result is used for judging whether to reach the corresponding gear temperature of NTC, if so, then closes output, if not, then opens output.
(3) beneficial effect
Compared with prior art; technical scheme of the present invention has the following advantages: work controllable silicon and protection controllable silicon cooperatively interact, and after work controllable silicon is out of control, protection controllable silicon can be cut off the electricity supply in time; synchronous detection line with heating function and line of induction working condition, fault-detecting ability is stronger.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of NTC single control circuit temperature temperature control method of the present invention;
Fig. 2 is the schematic block circuit diagram of NTC single control circuit temperature of the present invention;
Fig. 3 is four line traffic control circuit temperature theory diagrams of NTC single control circuit temperature of the present invention;
Fig. 4 is the circuit theory diagrams of NTC single control circuit temperature of the present invention;
Fig. 5 is four line traffic control circuit temperature schematic diagrams of NTC single control circuit temperature of the present invention;
Fig. 6 is the schematic block circuit diagram of the embodiment two of NTC single control circuit temperature of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
Embodiment one
As depicted in figs. 1 and 2, NTC single control circuit temperature of the present invention and temperature control method thereof, comprise heater and controller, and described heater comprises the line of induction, NTC layer and line with heating function, described controller comprises fuse, capacitance-resistance voltage reduction circuit, indicator light circuit, voltage detection circuit, synchronous signal circuit, first voltage detecting circuit, load detecting circuit, protection controllable silicon, work controllable silicon, work controllable silicon short-circuit detecting circuit and central processing unit, described fuse connects described capacitance-resistance voltage reduction circuit simultaneously, described voltage detection circuit, described synchronous signal circuit, described protection controllable silicon and described work controllable silicon short-circuit detecting circuit, described capacitance-resistance voltage reduction circuit, described indicator light circuit, described voltage detection circuit is connected central processing unit with described synchronous signal circuit, and described central processing unit is used for Control protection controllable silicon, first voltage detecting circuit, load detecting circuit and work controllable silicon, described work controllable silicon is for controlling line with heating function, and whether short described first voltage detecting circuit, for receiving NTC layer temperature variation, detect the described line of induction simultaneously, and circuit theory diagrams as shown in Figure 4.
Described line of induction two ends can arrange the second voltage detecting circuit, as shown in Figure 3, develop into four line single control circuit temperatures, by detecting the voltage ratio at line of induction two ends, central processing unit judges whether the line of induction has disconnection, detects the line of induction and line with heating function whether short-circuit conditions simultaneously.
Four line traffic control circuit temperature schematic diagrams as shown in Figure 5.
Described central processing unit is by detecting described first voltage detecting circuit and described second voltage detecting circuit both end voltage ratio judges line of induction disconnection.
The present invention also provides a kind of NTC single control circuit temperature and temperature control method thereof, comprises the following steps:
Carry out program initialization;
Carry out fault detect, the whether short circuit of testing controllable silicon, in this way, then closes output, as no, then protects controllable silicon work, fuse wire;
Judge whether timing arrives, and if so, then closes output;
Judge whether preheating, if so, then NTC preheat temperature value compares in preheating operation parameter and central processing unit, and if not, then in normal operational parameters and central processing unit, NTC temperature value contrasts;
Above-mentioned pre-thermal result is used for judging whether to reach the corresponding gear temperature of NTC, if so, then closes output, if not, then opens output.
Resistance and capacitances in series step-down provide stable voltage with voltage stabilizing diode voltage stabilizing composition capacitance-resistance voltage reduction circuit to central processing unit again.
Supply voltage monitoring is synchronous for the change and voltage sampling detecting supply voltage at any time, accurate to reach temperature control.
It is as synchronous in the modules such as timing, work controlled silicon conducting and power source change that synchronous signal circuit makes central processing unit inner.
NTC layer is by the change change in resistance of temperature, by the line of induction, central processing unit detects that the change of NTC resistance relevant voltage changes into digital signal and internal reference compares (compare and complete in central processing unit inside).Detect the inner or terminals whether short circuit of line with heating function and the NTC line of induction, the voltage difference that central processing unit detects judges load whether problem simultaneously.
Embodiment two
As shown in Figure 6, the present embodiment is substantially identical with embodiment one, difference is, the first voltage detecting circuit in embodiment one and described second voltage detecting circuit export with high frequency square wave respectively and high frequency square wave receives replacement, central processing unit exports high frequency square wave, when the line of induction, any one disconnects, and central processing unit does not receive high frequency square wave, thus judges the whether damage of the line of induction.
In sum, above-mentioned embodiment is not restricted embodiment of the present invention, and the modification that all those skilled in the art carry out on the basis of flesh and blood of the present invention or equivalent deformation, all at technology category of the present invention.
Claims (3)
1. a NTC single control circuit temperature, is characterized in that: comprise heater and controller, and described heater comprises the line of induction, NTC layer and line with heating function, described controller comprises fuse, capacitance-resistance voltage reduction circuit, indicator light circuit, voltage detection circuit, synchronous signal circuit, first voltage detecting circuit, load detecting circuit, protection controllable silicon, work controllable silicon, work controllable silicon short-circuit detecting circuit and central processing unit, described fuse connects described capacitance-resistance voltage reduction circuit simultaneously, described voltage detection circuit, described synchronous signal circuit, described protection controllable silicon and described work controllable silicon short-circuit detecting circuit, described capacitance-resistance voltage reduction circuit, described indicator light circuit, described voltage detection circuit is connected central processing unit with described synchronous signal circuit, and described central processing unit is used for Control protection controllable silicon, first voltage detecting circuit, load detecting circuit and work controllable silicon, described work controllable silicon is for controlling line with heating function, and described first voltage detecting circuit, for receiving NTC layer temperature variation, detects the whether short circuit of the described line of induction simultaneously.
2. NTC single control circuit temperature as claimed in claim 1, is characterized in that: described line of induction two ends arrange the first voltage detecting circuit and the second voltage detecting circuit respectively.
3. NTC single control circuit temperature as claimed in claim 2, is characterized in that: described central processing unit is by detecting described first voltage detecting circuit and described second voltage detecting circuit both end voltage ratio judges line of induction disconnection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310063931.1A CN103197711B (en) | 2013-02-28 | 2013-02-28 | Negative temperature coefficient (NTC) single temperature control circuit and temperature control method thereof |
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| CN201310063931.1A CN103197711B (en) | 2013-02-28 | 2013-02-28 | Negative temperature coefficient (NTC) single temperature control circuit and temperature control method thereof |
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| CN103197711A CN103197711A (en) | 2013-07-10 |
| CN103197711B true CN103197711B (en) | 2015-05-20 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1809223A (en) * | 2005-01-21 | 2006-07-26 | 杨顺在 | Heat radiating structure and temperature control method |
| CN101035644A (en) * | 2004-05-26 | 2007-09-12 | 韦斯控制装置公司 | Heater wire and control therefor |
| CN201039469Y (en) * | 2007-03-28 | 2008-03-19 | 张隆皇 | A constant temperature heating device and its heater |
| CN201097239Y (en) * | 2007-10-18 | 2008-08-06 | 张隆皇 | Heating control device with dual-core heating line |
| JP2009093014A (en) * | 2007-10-10 | 2009-04-30 | Kyocera Mita Corp | Temperature controller |
| CN101592962A (en) * | 2009-05-06 | 2009-12-02 | 宁波锦春电器有限公司 | A kind of temperature control equipment of PTC/NTC electric heating element |
| WO2010045221A1 (en) * | 2008-10-13 | 2010-04-22 | Egc Enterprises, Incorporated | Temperature monitoring and control system for negative temperature coefficient heaters |
| CN201845243U (en) * | 2010-05-21 | 2011-05-25 | 施军达 | Temperature controller |
-
2013
- 2013-02-28 CN CN201310063931.1A patent/CN103197711B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101035644A (en) * | 2004-05-26 | 2007-09-12 | 韦斯控制装置公司 | Heater wire and control therefor |
| CN1809223A (en) * | 2005-01-21 | 2006-07-26 | 杨顺在 | Heat radiating structure and temperature control method |
| CN201039469Y (en) * | 2007-03-28 | 2008-03-19 | 张隆皇 | A constant temperature heating device and its heater |
| JP2009093014A (en) * | 2007-10-10 | 2009-04-30 | Kyocera Mita Corp | Temperature controller |
| CN201097239Y (en) * | 2007-10-18 | 2008-08-06 | 张隆皇 | Heating control device with dual-core heating line |
| WO2010045221A1 (en) * | 2008-10-13 | 2010-04-22 | Egc Enterprises, Incorporated | Temperature monitoring and control system for negative temperature coefficient heaters |
| CN101592962A (en) * | 2009-05-06 | 2009-12-02 | 宁波锦春电器有限公司 | A kind of temperature control equipment of PTC/NTC electric heating element |
| CN201845243U (en) * | 2010-05-21 | 2011-05-25 | 施军达 | Temperature controller |
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| CN103197711A (en) | 2013-07-10 |
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Address after: To the north of 312055 Zhejiang County of Shaoxing Province Wang Tan Village sand road Patentee after: ZHEJIANG LYVMENG HEALTH TECHNOLOGY CO.,LTD. Address before: To the north of 312055 Zhejiang County of Shaoxing Province Wang Tan Village sand road Patentee before: Zhejiang Green Health Technology Co.,Ltd. |
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Address after: 312000 room 0107, building 6, daqianmen community, Qianqing Town, Keqiao District, Shaoxing City, Zhejiang Province Patentee after: ZHEJIANG LYVMENG HEALTH TECHNOLOGY CO.,LTD. Country or region after: China Address before: 312055 North of Middle Road, Shadi Village, Wangtan Town, Shaoxing County, Zhejiang Province Patentee before: ZHEJIANG LYVMENG HEALTH TECHNOLOGY CO.,LTD. Country or region before: China |
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