CN104932584A - Temperature control method and system of electric heater - Google Patents
Temperature control method and system of electric heater Download PDFInfo
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- CN104932584A CN104932584A CN201510310131.4A CN201510310131A CN104932584A CN 104932584 A CN104932584 A CN 104932584A CN 201510310131 A CN201510310131 A CN 201510310131A CN 104932584 A CN104932584 A CN 104932584A
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Abstract
The invention discloses a temperature control method and system of an electric heater. Wherein, the method comprises the following steps: collecting the surface temperature of a heat pipe of the electric heater and the temperature of an air outlet; generating a temperature control signal according to the temperature of the surface of the heat pipe of the electric heater and the temperature of the air outlet; and adjusting the heating temperature of the electric heater according to the temperature control signal. The invention solves the technical problem that the temperature of the electric heater can not be accurately controlled by controlling the starting and the stopping of the electric heater by detecting the temperature of the air outlet of the electric heater.
Description
Technical field
The present invention relates to domain of control temperature, in particular to a kind of temperature-controlled process and system of electric heater.
Background technology
Along with the development of industry processing techniques, more and more stricter to the precise requirements of technical parameter, can, especially to the control of temperature, the control of temperature not only directly affects the processing quality of product, and be related to equipment and run the security of the lives and property with personnel safely and effectively.One of three necessary conditions that set off an explosion are exactly the burning-point reaching combustible, effectively controlled the temperature of explosion-proof environment, make its burning-point lower than combustible effectively can ensure the security of operation of equipment by the temperature controlling electric heater.
Under normal conditions, by the impact of electric heater tube surface radiating efficiency, electric heater tube surface local temperature can sharply can rise in the short time, affect the safety of electric heater, and the temperature fluctuation of electrothermal tube-surface is large, have a strong impact on the safe operation of equipment, in order to ensure product quality, prevent because the fluctuation of saved electric-heating heat-tube surface temperature exceedes safe range and cause the quality accident of product and the security incident of personnel, effective temperature being carried out to electric heating system and controls to be very important.
At present, the temperature control scheme of existing electric heater is as follows: at the air-out location arrangements temperature-sensitive bag of electric heater, the control being detected gas flow temperature change by temperature-sensitive bag and then controlled electrically heated start and stop to realize to electric heater temperature.
Here it should be noted that, in above-mentioned existing scheme, the temperature only by detecting electric heater air outlet controls the start and stop of electric heater, can not accurately control the temperature of electric heater.
For the start and stop controlling electric heater above by the temperature detecting electric heater air outlet, can not accurately control the problem of the temperature of electric heater, not yet propose effective solution at present.
Summary of the invention
Embodiments provide a kind of temperature-controlled process and system of electric heater, controlling the start and stop of electric heater with the temperature at least solved by detecting electric heater air outlet, can not accurately control the technical matters of the temperature of electric heater.
According to an aspect of the embodiment of the present invention, provide a kind of temperature-controlled process of electric heater, comprising: the temperature of tube surface and the temperature of air outlet that gather electric heater; Temperature control signals is generated according to the temperature of the tube surface of electric heater and the temperature of air outlet; According to temperature control signals regulate electric heater heat temperature.
According to the another aspect of the embodiment of the present invention, additionally provide a kind of temperature control system of electric heater, comprise: temperature controller, for the temperature of the temperature and air outlet that gather the tube surface of electric heater, wherein, temperature controller also generates temperature control signals for the temperature of the tube surface according to electric heater and the temperature of air outlet; Electric heater, heats temperature for receiving temperature control signals and regulating according to temperature control signals.
In embodiments of the present invention, the temperature of tube surface gathering electric heater and the temperature of air outlet is adopted; Temperature control signals is generated according to the temperature of the tube surface of electric heater and the temperature of air outlet; Regulate the mode heating temperature of electric heater according to temperature control signals, the temperature solved by detecting electric heater air outlet controls the start and stop of electric heater, can not accurately control the technical matters of the temperature of electric heater.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the process flow diagram of the temperature-controlled process of electric heater according to the embodiment of the present invention one;
Fig. 2 is the schematic diagram realizing the temperature-controlled process of electric heater alternatively according to the embodiment of the present invention one;
Fig. 3 is the schematic diagram of the electric heater according to the embodiment of the present invention one;
Fig. 4 is the schematic diagram of the electric heater work according to the embodiment of the present invention one; And
Fig. 5 is the structured flowchart of the temperature control system of electric heater according to the embodiment of the present invention two.
Embodiment
The present invention program is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.
It should be noted that, term " first ", " second " etc. in instructions of the present invention and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged in the appropriate case, so as embodiments of the invention described herein can with except here diagram or describe those except order implement.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of series of steps or unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.
Embodiment one
According to the embodiment of the present invention, provide a kind of embodiment of temperature-controlled process of electric heater, it should be noted that, can perform in the computer system of such as one group of computer executable instructions in the step shown in the process flow diagram of accompanying drawing, and, although show logical order in flow charts, in some cases, can be different from the step shown or described by order execution herein.
Fig. 1 is the process flow diagram of the temperature-controlled process of electric heater according to the embodiment of the present invention, and as shown in Figure 1, the method comprises the steps:
Step S102, gathers the temperature of tube surface and the temperature of air outlet of electric heater.
Particularly, in above-mentioned steps S102, PID controller can be adopted to gather the temperature of the air outlet in the temperature of the tube surface of electric heater and electric heater, above-mentioned PID controller can be and above-mentioned electric heater independently device, also can to become one device with above-mentioned electric heater.Alternatively, the electric heater in the application can be explosion-proof electric heating device.
Step S104, generates temperature control signals according to the temperature of the tube surface of electric heater and the temperature of air outlet.
Particularly, in above-mentioned steps S104, temperature control signals is generated according to the temperature of the air outlet in the temperature of the tube surface of the electric heater collected and electric heater by above-mentioned PID temperature controller, alternatively, by PID temperature controller, the temperature of the air outlet in the temperature of the tube surface of the electric heater collected and electric heater and the expectation value preset can be compared rear generation temperature control signals, said temperature control signal heats temperature for what regulate above-mentioned electric heater.
It should be noted that, the temperature of the air outlet in the temperature of the tube surface to electric heater that above-mentioned PID temperature controller can be real-time and electric heater gather and real-time generation temperature control signals to control the temperature that heats of electric heater.
Step S106, according to temperature control signals regulate electric heater heat temperature.
Particularly, above-mentioned electric heater heat the temperature that temperature can comprise the temperature of electric heater heat pipe and the air temperature of electric heater.
The embodiment of the present invention, by real-time, the temperature of the air outlet in the temperature of the tube surface of electric heater and electric heater and the expectation value preset are compared rear generation temperature control signals, due in the present embodiment, these two temperature values of temperature of the air outlet in the temperature of the tube surface of electric heater and electric heater can be collected, above-mentioned two temperature values can reflect accurately electric heater real-time heat temperature, what the temperature control signals that therefore above-mentioned PID temperature controller generates can control electric heater accurately heats temperature, the more reliable and safety that electric heating equipment is run in explosion-proof environment, solved the temperature of detection electric heater air outlet to control the start and stop of electric heater, can accurately not control the technical matters of the temperature of electric heater
Alternatively, step S104, the step generating temperature control signals according to the temperature of the tube surface of electric heater and the temperature of air outlet can comprise following three schemes:
Scheme one:
Be more than or equal to the first design temperature in the temperature of the tube surface of electric heater, and when the temperature of air outlet is less than the second design temperature, temperature control signals is the power reducing electric heater.
Scheme two:
Be less than or equal to the first design temperature in the temperature of the tube surface of electric heater, and when the temperature of air outlet is less than the second design temperature, temperature control signals is the power increasing electric heater.
Scheme three:
Be more than or equal to the first design temperature in the temperature of the tube surface of electric heater, and when the temperature of air outlet equals the second design temperature, temperature control signals is the power keeping electric heater.、
Particularly, in above-mentioned three schemes, above-mentioned first design temperature can be the temperature of explosion-proof environment requirement, temperature for the tube surface with electric heater contrasts, above-mentioned second design temperature can be the pre-set temperature of staff, for contrasting with the temperature of above-mentioned air outlet.
Specifically describe the process that PID temperature controlling value carries out temperature comparisons below:
Above-mentioned PID temperature controller collect the surface temperature of electric heater heat pipe with air outlet temperature after, collect two temperature values and expectation value are contrasted: when above-mentioned tube surface temperature t1 also under the temperature that explosion-proof environment requires and leaving air temp t2 does not also reach above-mentioned second design temperature t3 time, PID temperature controller will export increases the order of power.When tube surface temperature t1 exceedes the temperature of explosion-proof environment requirement and leaving air temp t2 does not also reach design temperature t3, output is fallen lower powered order by PID temperature controller, ensures the safety that equipment runs.When tube surface temperature t1 also explosion-proof environment require temperature under and leaving air temp t2 equals design temperature t3 (t2=t3) time, PID temperature controller keeps the order of power by exporting, the temperature of electric heater is finally stabilized in small fluctuation range run, it should be noted that, " under the temperature that tube surface temperature t1 also requires at explosion-proof environment and leaving air temp t2 equals design temperature t3 " heats temperature for the safety of electric heater in explosion-proof environment.
Alternatively, step S106, regulates the step heating temperature of electric heater to comprise according to temperature control signals:
Step S1061, is sent to power regulating eqiupment by temperature control signals.
Step S1062, power regulating eqiupment exports the electric power after adjustment to electric heater according to temperature control signals.
Step S1063, electric heater carries out work according to the electric power after adjustment.
Particularly, above-mentioned PID temperature controller is after generation temperature control signals, said temperature control signal can be sent to electric heater, in the middle of a kind of optional embodiment, above-mentioned electric heater can comprise power regulating eqiupment, and power regulating eqiupment according to after said temperature control signal U (t), can perform the Power Regulation action corresponding with U (t), and the electric power exported after adjustment is to electric heater, electric heater carries out work according to the electric power after adjustment.
Alternatively, step S102, after gathering the temperature of tube surface of electric heater and the temperature of air outlet, the temperature-controlled process of the electric heater that the embodiment of the present invention provides can also comprise:
Step S103, is sent to display by the temperature of the tube surface of electric heater and/or the temperature of air outlet.
Particularly, after above-mentioned PID temperature controller collects the temperature of the tube surface of electric heater and the temperature of air outlet, the temperature of the temperature of the tube surface of electric heater and/or air outlet can be sent to the temperature indicator in electric heater, show the temperature of the tube surface of electric heater and the temperature of air outlet in real time to make said temperature display.
Alternatively, step S102, the collection temperature of tube surface of electric heater and the step of the temperature of air outlet can comprise:
Step S1021, obtains the temperature of the tube surface of electric heater by the thermal resistance sensor in electric heater, and obtains the temperature of air outlet by the air outlet temperature sensor in electric heater.
Particularly, thermal resistance sensor can be comprised in above-mentioned electric heater, alternatively, above-mentioned thermal resistance sensor can be explosion-proof type thermal resistance PT100, the resistance of explosion-proof type thermal resistance PT100 at the uniform velocity can increase along with temperature rises to form, in this programme, the corresponding temperature value detecting heat pipe can be carried out by the resistance detecting thermal resistance PT100.
In the middle of a kind of optional embodiment, the scheme of the application can be embodied in the large-scale tail end air conditioner unit electric heater based on explosion-proof environment, large-scale tail end air conditioner unit, when running heating mode in the environment that height is explosion-proof, can start electric heater when heating the operating mode value that cannot reach and run setting by air-conditioner host refrigerant and carry out auxiliary heating.
Below in conjunction with Fig. 2, for the above-mentioned large-scale tail end air conditioner unit electric heater based on explosion-proof environment, this programme is specifically addressed:
S1: first duty parameter R (t) is input to PID temperature controller 10 by input interface, the relational expressions such as the object run power of the well heater that above-mentioned duty parameter R (t) can preset for staff, above-mentioned duty parameter R (t) is converted to signal U (t) through PID temperature controller 10 and controls to export.
S2: power regulating eqiupment 12 performs Power Regulation action after receiving U (t) signal, and export electric power G (t) after adjustment.
S3: electric power G (t) after adjustment is input to explosion-proof electric heating device 14 by input interface by wire by power regulating eqiupment 12, explosion-proof electric heating device 14 carries out work according to the electric power of adjustment, and tube surface temperature starts to rise.
The temperature of the tube surface in S4: explosion-proof type thermal resistance PT100 continual detection explosion-proof electric heating device 14, and by P (t) signal back PID temperature controller 10.
S5: leaving air temp sensor 18 is also constantly detecting air temperature simultaneously, and Q (t) signal back PID temperature controller 10 and temperature indicator 20 is shown.
S6:PID temperature controller 10 receives P (t) signal of explosion-proof type thermal resistance PT100 feedback and Q (t) signal of leaving air temp sensor 18 feedback, and these two signals and expectation value are contrasted, the response of correcting system is carried out by this deviation, perform regulable control, export new control signal U (t).
S7: power regulating eqiupment 12 performs new Power Regulation action after receiving new U (t) signal, and export the electric power after adjustment.
By above-mentioned steps S1 to S7, can form the system of a closed loop, and the Y (t) of final explosion-proof electric heating device 14 exports in the safe temperature range that and temperature that is explosion-proof electric heating device tube surface identical with expectation value control to require in explosion-proof environment all the time.
Below the function of each device occurred in Fig. 2 is described:
1, PID temperature controller 10: receive in closed loop automatic control system that controlled device is counter sends back numerical value, and compared with expectation value, carry out the response of correcting system by this deviation.
2, power regulating eqiupment 12: receive the order performing PID temperature controller and send, to electric heater output power.
3, explosion-proof type thermal resistance PT100: be a temperature sensor in closed loop automatic control system, its resistance at the uniform velocity can increase along with temperature rises to form, and by detecting the resistance value of PT100, corresponding can detect the temperature value of measured amount.
4, leaving air temp sensor 18: the leaving air temp detecting explosion-proof electric heating device.
5, temperature indicator 20: the leaving air temp value demonstrating the explosion-proof electric heating device that air temperature sensor 18 detects.
Here it should be noted that, said temperature display 20 also can show the temperature of heat pipe.
6, explosion-proof electric heating device 14: serve as topworks in closed-loop system, receive also implementation controller and send the order of intensification, insulation, heating etc. to the liquid state flowed, gaseous medium, the schematic diagram of above-mentioned explosion-proof electric heating device can be as shown in Figure 3, at least one leaving air temp check point A and multiple thermal resistance PT100 can be comprised in explosion-proof electric heating device, the schematic diagram that this explosion-proof electric heating device runs as shown in Figure 4, alternatively, explosion-proof type electric cabinet can be provided with in above-mentioned explosion-proof electric heating device.
Here it should be noted that, between each device above-mentioned, wire can be used to link together.
Embodiment two
The embodiment of the present invention can also provide a kind of temperature control system of electric heater, and this system may be used for realizing the scheme in said method embodiment, and as shown in Figure 5, this system can comprise:
Temperature controller 10, for the temperature of the temperature and air outlet that gather the tube surface of electric heater, wherein, temperature controller also generates temperature control signals for the temperature of the tube surface according to electric heater and the temperature of air outlet.
Electric heater 14, heats temperature for receiving temperature control signals and regulating according to temperature control signals.
It should be noted that, the temperature controller occurred herein can be PID temperature controller, and the electric heater occurred herein can be explosion-proof electric heating device.
The embodiment of the present invention, by real-time, the temperature of the air outlet in the temperature of the tube surface of electric heater and electric heater and the expectation value preset are compared rear generation temperature control signals, due in the present embodiment, these two temperature values of temperature of the air outlet in the temperature of the tube surface of electric heater and electric heater can be collected, above-mentioned two temperature values can reflect accurately electric heater real-time heat temperature, what the temperature control signals that therefore above-mentioned PID temperature controller generates can control electric heater accurately heats temperature, the more reliable and safety that electric heating equipment is run in explosion-proof environment, solved the temperature of detection electric heater air outlet to control the start and stop of electric heater, can accurately not control the technical matters of the temperature of electric heater
Optionally, said temperature controller 10 can comprise:
Microprocessor, the temperature for the tube surface at electric heater is more than or equal to the first design temperature, and when the temperature of air outlet is less than the second design temperature, generates the temperature control signals of the power reducing electric heater; Be less than or equal to the first design temperature in the temperature of the tube surface of electric heater, and when the temperature of air outlet is less than the second design temperature, generate the temperature control signals of the power increasing electric heater; Be more than or equal to the first design temperature in the temperature of the tube surface of electric heater, and when the temperature of air outlet equals the second design temperature, generate the temperature control signals of the power keeping electric heater.
Optionally, said system can also comprise: power regulating eqiupment, for exporting the electric power after adjustment according to temperature control signals to electric heater; Electric heater is also for carrying out work according to the electric power after adjustment.
Optionally, said system can also comprise: display, for the temperature of the temperature and/or air outlet that receive the tube surface of electric heater.
Optionally, said system can also comprise: air outlet temperature sensor, for the temperature of the air outlet detected is sent to temperature controller; Thermal resistance sensor, is sent to temperature controller for logical by the temperature of the tube surface of the acquisition electric heater detected.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
In the above embodiment of the present invention, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part described in detail, can see the associated description of other embodiments.
In several embodiments that the application provides, should be understood that, disclosed technology contents, the mode by other realizes.Wherein, device embodiment described above is only schematic, the such as division of described unit, can be that a kind of logic function divides, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of unit or module or communication connection can be electrical or other form.
The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed on multiple unit.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.
If described integrated unit using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words or all or part of of this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprises all or part of step of some instructions in order to make a computer equipment (can be personal computer, server or the network equipment etc.) perform method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, ROM (read-only memory) (ROM, Read-OnlyMemory), random access memory (RAM, Random Access Memory), portable hard drive, magnetic disc or CD etc. various can be program code stored medium.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a temperature-controlled process for electric heater, is characterized in that, comprising:
Gather the temperature of tube surface and the temperature of air outlet of electric heater;
Temperature control signals is generated according to the temperature of the tube surface of described electric heater and the temperature of described air outlet;
What regulate described electric heater according to described temperature control signals heats temperature.
2. method according to claim 1, is characterized in that, the step generating temperature control signals according to the temperature of the tube surface of described electric heater and the temperature of described air outlet comprises:
Be more than or equal to the first design temperature in the temperature of the tube surface of described electric heater, and when the temperature of described air outlet is less than the second design temperature, described temperature control signals is the power reducing described electric heater;
Be less than or equal to described first design temperature in the temperature of the tube surface of described electric heater, and when the temperature of described air outlet is less than described second design temperature, described temperature control signals is the power increasing described electric heater;
Be more than or equal to described first design temperature in the temperature of the tube surface of described electric heater, and when the temperature of described air outlet equals described second design temperature, described temperature control signals is the power keeping described electric heater.
3. method according to claim 2, is characterized in that, regulates the step heating temperature of described electric heater to comprise according to described temperature control signals:
Described temperature control signals is sent to power regulating eqiupment;
Described power regulating eqiupment exports the electric power after adjustment to described electric heater according to described temperature control signals;
Described electric heater carries out work according to the electric power after described adjustment.
4. method according to claim 1, is characterized in that, after gathering the temperature of tube surface of electric heater and the temperature of air outlet, described method also comprises:
The temperature of the temperature of the tube surface of described electric heater and/or described air outlet is sent to display.
5. method according to claim 1, is characterized in that, the collection temperature of tube surface of electric heater and the step of the temperature of air outlet comprise:
Obtained the temperature of the tube surface of described electric heater by the thermal resistance sensor in described electric heater, and obtain the temperature of described air outlet by the air outlet temperature sensor in described electric heater.
6. a temperature control system for electric heater, is characterized in that, comprising:
Temperature controller, for the temperature of the temperature and air outlet that gather the tube surface of electric heater, wherein, described temperature controller also generates temperature control signals for the temperature of the tube surface according to described electric heater and the temperature of described air outlet;
Electric heater, heats temperature for receiving described temperature control signals and regulating according to described temperature control signals.
7. system according to claim 6, is characterized in that, described temperature controller comprises:
Microprocessor, the temperature for the tube surface at described electric heater is more than or equal to the first design temperature, and when the temperature of described air outlet is less than the second design temperature, generates the temperature control signals of the power reducing described electric heater; Be less than or equal to described first design temperature in the temperature of the tube surface of described electric heater, and when the temperature of described air outlet is less than described second design temperature, generate the temperature control signals of the power increasing described electric heater; Be more than or equal to described first design temperature in the temperature of the tube surface of described electric heater, and when the temperature of described air outlet equals described second design temperature, generate the temperature control signals of the power keeping described electric heater.
8. system according to claim 7, is characterized in that, described system also comprises:
Power regulating eqiupment, for exporting the electric power after adjustment to described electric heater according to described temperature control signals;
Described electric heater is also for carrying out work according to the electric power after described adjustment.
9. system according to claim 8, is characterized in that, described system also comprises:
Display, for the temperature of the temperature and/or described air outlet that receive the tube surface of described electric heater.
10. system according to claim 9, is characterized in that, described system also comprises:
Air outlet temperature sensor, for being sent to described temperature controller by the temperature of the described air outlet detected;
Thermal resistance sensor, is sent to described temperature controller for logical by the temperature of the tube surface of described for the acquisition detected electric heater.
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| CN107505963A (en) * | 2017-09-30 | 2017-12-22 | 扬中市华荣电器设备有限公司 | Temprature control method for the electric airheater of autoclave |
| CN109406003A (en) * | 2018-08-31 | 2019-03-01 | 惠州市卡儿酷科技有限公司 | Electronic equipment and temperature monitoring method |
| CN114855190A (en) * | 2022-03-07 | 2022-08-05 | 广西汇元锰业有限责任公司 | Post-curing device for manganese dioxide electrolytic bath anticorrosive coating |
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| CN202443345U (en) * | 2012-03-07 | 2012-09-19 | 常州市华立液压润滑设备有限公司 | Constant-temperature electric heater |
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