CN105960036A - Sectional type precision control electric heater - Google Patents
Sectional type precision control electric heater Download PDFInfo
- Publication number
- CN105960036A CN105960036A CN201610312779.XA CN201610312779A CN105960036A CN 105960036 A CN105960036 A CN 105960036A CN 201610312779 A CN201610312779 A CN 201610312779A CN 105960036 A CN105960036 A CN 105960036A
- Authority
- CN
- China
- Prior art keywords
- heater
- heater strip
- heating
- temperature
- power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 claims description 6
- 239000004519 grease Substances 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract description 21
- 238000012360 testing method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0202—Switches
Landscapes
- Control Of Resistance Heating (AREA)
Abstract
The invention relates to a sectional type precision control electric heater, which is characterized in that a plurality of heating wires are sequentially wound on a pipeline, each heating wire is serially connected with a switch and is then parallelly connected to a power supply, a plurality of thermocouples are uniformly arranged in the same cross section of the pipe wall behind each heating wire, a PID controller acquires the temperature of the thermocouples on each cross section and calculates an average value so as to act as an acquisition temperature of the corresponding heating wire, and the PID controller compares temperatures of the pipe wall behind the adjacent heating wires and outputs control signals so as to control on-off of each switch. Heating wires which are different in power and the power supply can be changed according to requirements, and the actual arrangement quantity of the heating wires is changed, thereby meeting heat requirements of a test over a wide range; and heating wires which are different in power can be arranged on the same heater, thereby further improving the heating precision of the heater.
Description
Technical field
The present invention relates to a kind of electric heater, particularly to a kind of stagewise precision controlling electric heater.
Background technology
In recent years, the replacement of novel refrigerant, the development of thermoexcell gradually cause everybody attention, for
Obtaining stable environment operating mode, electrical heating can provide stable thermal source progressively to come into operation with it.But common electricity adds
Hot device is only to be wound around heater strip outside pipe, changes heating power, this method by regulation input voltage value
The precision controlling to sender property outlet state cannot be met, be not particularly suited for two phase experimental study on heat transfer to specific
Mass dryness fraction scope operating mode sets, and in view of factors such as radiation, convection current, heat conduction, its heat waste is also the tightest
Weight, is extremely difficult to qualified thermal balance effect.
Summary of the invention
The present invention be directed to electric heating control precision and cannot meet thermally equilibrated problem, it is proposed that a kind of stagewise
Precision controlling electric heater, usage quantity, the heater strip on the basis of typical electric heater, to heater strip
Connected mode, the control program of heater, concrete parameter etc. of measuring be modified, can realize working medium
Add the precision controlling of heat.Regulate the actual heated length of heater by changing heater strip usage quantity, enter
And change and add heat；To heater configuration different capacity heater strip, can realize working medium in pipe outlet state
Precision controlling；Each heater strip is connected in parallel, and determines if to come into operation by the Guan Bi of switch S；
The Guan Bi of switch S is controlled by PID setting program, and its control program sports response letter with tube wall temperature
Number, there is the advantage that the corresponding time is short, degree of regulation is high.
The technical scheme is that a kind of stagewise precision controlling electric heater, several heater strips successively around
On pipeline, every heater strip is contacted one after switching and joining power, and after every heater strip, tube wall is same
Being evenly arranged several thermocouple in cross section, PID controller gathers electric thermo-couple temperature on each cross section, and calculates
Meansigma methods as corresponding heater strip collecting temperature, tube wall temperature after the more adjacent heater strip of PID controller, defeated
Go out the control signal every way switch of control to cut-off.
Added with heat-conducting silicone grease between described heater strip and pipeline outer wall, make pipeline wall thermally equivalent.
The power of described several heater strip is different.
The beneficial effects of the present invention is: stagewise precision controlling electric heater of the present invention, can as required,
Change heater strip and the power supply of different capacity, and change heater strip actual arrangement quantity, with satisfied test to relatively
Heat demand on a large scale；Can also arrange on same heater that the heater strip of different capacity is (in little merit
Series resistance on rate heater strip circuit), improve the heating accuracy of heater further.
Accompanying drawing explanation
Fig. 1 is subsection heater principle assumption diagram of the present invention；
Fig. 2 is electrical heated pipings sectional view of the present invention；
Fig. 3 is PID control system flow chart of the present invention.
Detailed description of the invention
According to experiment predetermined heat amount and single heater strip power, determine offer power and required heating
Silk hop count.Having as a example by 5 heater strips by whole bringing-up section herein and illustrate, 5 heater strips are wound on pipe successively
On road, numbering 1#, 2#, 3#, 4#, 5# respectively, 5 sections of heater strips are in parallel in whole circuit diagram, respectively
Controlled, as shown in Fig. 1 heater system schematic diagram by switch S1, S2, S3, S4, S5.Every heating
Be sequentially arranged temperature point after Si at 10cm, in Fig. 11,2,3,4,5 five representative cross sections be heat
Cross section arranged by galvanic couple, and in same cross section, four positions are respectively arranged a thermocouple up and down, for dividing
Do not measure the duct wall surface temperature after electrical heating wire 1#, 2#, 3#, 4#, 5# heat, and PID controls to carry
Take the meansigma methods that temperature parameter is four temperature values, as a example by i (1≤i≤5) puts i.e.:
ti=(tiA+tiB+tiC+tiD)/4, and added with heat-conducting silicone grease between heater strip and pipeline outer wall, duct wall can be made
Face thermally equivalent, as shown in Figure 2 i point electrical heated pipings sectional view.Because heater described herein is to install 5
As a example by electrical heating wire, therefore 20 thermocouples need to be arranged altogether in whole bringing-up section, and PID collecting temperature is corresponding
Point thermocouple gathers the meansigma methods of data.
Stagewise precision heater is different from the past to be accessed the magnitude of voltage at heating wire two ends by regulation and changes and add
Thermal power, but add heat according to required, whether the use controlling single heating wire changes whole heater
Actual heated length, be adjusted adding heat, its degree of accuracy is relevant with the heating power of heater strip, adds
Thermal power is the least, and precision is the highest, therefore can arrange the heater strip of different capacity in power adder, according to actual shape
Enthalpy difference between state point and saturation point carries out selectivity use to heater strip.Additionally, be cased with outside heater strip
Heat-insulation layer, is used for preventing heat from leaking, and reduces the irreversible loss of heat.
PID regulation " is dried up " according to heat exchange after phenomenon appearance, and heat conductivity declines, and it is former that wall temperature steeply rises
Reason, uses wall temperature for measuring parameter, and the keying to switch S automatically controls, and the method response time is short,
Considerably increasing the precision adding heat, particular flow sheet is shown in Fig. 3.Temperature t when inputi、ti-1Difference is less than
When 10 DEG C, illustrating that wall temperature change is less, intraductal working medium is still two phases, switchs SiAutomatically Guan Bi, connection adds
Heated filament proceeds heating to working medium；Temperature t when inputi、ti-1When difference is more than 10 DEG C, " drying up " is existing
As occurring, intraductal working medium reached hot, it is not necessary to be further continued for heating, and switched SiDisconnect, and Si+1To Sn
All switches all remain off, n=5 here, stop working medium being heated.
Claims (3)
1. a stagewise precision controlling electric heater, it is characterized in that, several heater strips are wound on pipeline successively, every heater strip is contacted one after switching and joining power, being evenly arranged several thermocouple after every heater strip in the same cross section of tube wall, PID controller gathers electric thermo-couple temperature on each cross section, and calculates meansigma methods as corresponding heater strip collecting temperature, tube wall temperature after the more adjacent heater strip of PID controller, output control signal controls every way switch and cut-offs.
The most according to claim 1, stagewise precision controlling electric heater, it is characterised in that added with heat-conducting silicone grease between described heater strip and pipeline outer wall, make pipeline wall thermally equivalent.
Stagewise precision controlling electric heater the most according to claim 1, it is characterised in that the power of described several heater strips is different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610312779.XA CN105960036A (en) | 2016-05-12 | 2016-05-12 | Sectional type precision control electric heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610312779.XA CN105960036A (en) | 2016-05-12 | 2016-05-12 | Sectional type precision control electric heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105960036A true CN105960036A (en) | 2016-09-21 |
Family
ID=56912523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610312779.XA Pending CN105960036A (en) | 2016-05-12 | 2016-05-12 | Sectional type precision control electric heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105960036A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106582452A (en) * | 2016-12-05 | 2017-04-26 | 四川理工学院 | Low-concentration gas generation device |
| CN109884277A (en) * | 2019-04-02 | 2019-06-14 | 白城师范学院 | An integrated device for weather regulation and soil detection based on agricultural cultivation experiments |
| CN113404317A (en) * | 2021-06-04 | 2021-09-17 | 中信建设有限责任公司 | Winter construction concrete intelligent variable power temperature control wall heat preservation template |
| CN114295666A (en) * | 2021-12-17 | 2022-04-08 | 湖南汉华京电清洁能源科技有限公司 | Electric heating method for liquid metal |
| CN115143735A (en) * | 2022-06-29 | 2022-10-04 | 厦门海辰新能源科技有限公司 | Rapid preheating and drying method, production process of lithium ion battery and lithium ion battery |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101866190A (en) * | 2010-07-02 | 2010-10-20 | 西安电炉研究所有限公司 | Temperature cascade PID (Proportion Integration Differentiation) control system of high-temperature high-pressure testing device and control method thereof |
| CN103557704A (en) * | 2013-10-12 | 2014-02-05 | 深圳市华星光电技术有限公司 | Crucible heating device and method |
| CN203668460U (en) * | 2013-12-24 | 2014-06-25 | 北京七星华创电子股份有限公司 | Sectional type heating device |
-
2016
- 2016-05-12 CN CN201610312779.XA patent/CN105960036A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101866190A (en) * | 2010-07-02 | 2010-10-20 | 西安电炉研究所有限公司 | Temperature cascade PID (Proportion Integration Differentiation) control system of high-temperature high-pressure testing device and control method thereof |
| CN103557704A (en) * | 2013-10-12 | 2014-02-05 | 深圳市华星光电技术有限公司 | Crucible heating device and method |
| CN203668460U (en) * | 2013-12-24 | 2014-06-25 | 北京七星华创电子股份有限公司 | Sectional type heating device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106582452A (en) * | 2016-12-05 | 2017-04-26 | 四川理工学院 | Low-concentration gas generation device |
| CN106582452B (en) * | 2016-12-05 | 2019-04-09 | 四川理工学院 | Low concentration gas generator |
| CN109884277A (en) * | 2019-04-02 | 2019-06-14 | 白城师范学院 | An integrated device for weather regulation and soil detection based on agricultural cultivation experiments |
| CN113404317A (en) * | 2021-06-04 | 2021-09-17 | 中信建设有限责任公司 | Winter construction concrete intelligent variable power temperature control wall heat preservation template |
| CN114295666A (en) * | 2021-12-17 | 2022-04-08 | 湖南汉华京电清洁能源科技有限公司 | Electric heating method for liquid metal |
| CN115143735A (en) * | 2022-06-29 | 2022-10-04 | 厦门海辰新能源科技有限公司 | Rapid preheating and drying method, production process of lithium ion battery and lithium ion battery |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160921 |
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| WD01 | Invention patent application deemed withdrawn after publication |