CN114115386A - Electric heater control method, system and device - Google Patents
Electric heater control method, system and device Download PDFInfo
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- CN114115386A CN114115386A CN202111405371.4A CN202111405371A CN114115386A CN 114115386 A CN114115386 A CN 114115386A CN 202111405371 A CN202111405371 A CN 202111405371A CN 114115386 A CN114115386 A CN 114115386A
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- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000010438 heat treatment Methods 0.000 claims abstract description 155
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 35
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 35
- 239000010703 silicon Substances 0.000 claims abstract description 35
- 239000007787 solid Substances 0.000 claims description 7
- 238000004590 computer program Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000001276 controlling effect Effects 0.000 description 21
- 230000008569 process Effects 0.000 description 7
- 230000009471 action Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/30—Automatic controllers with an auxiliary heating device affecting the sensing element, e.g. for anticipating change of temperature
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Abstract
The invention discloses a method, a system and a device for controlling an electric heater. Wherein, reduced the number that just can the temperature regulation heating pipe of conduction angle through adjusting the silicon controlled rectifier through using two kinds of regulation methods in this application, increased the conduction angle of silicon controlled rectifier simultaneously to reduced harmonic current's production, avoided producing the safety influence to other equipment, in addition, still remain partial through adjusting the mode that the temperature of silicon controlled rectifier conduction angle regulation waited to heat the position, thereby guaranteed temperature regulation's precision.
Description
Technical Field
The invention relates to the field of chemical industry, in particular to a method, a system and a device for controlling an electric heater.
Background
In chemical enterprises, electric heaters are increasingly applied, low-temperature fluid media in the electric heaters during working enter input ports of the electric heaters under the action of pressure through pipelines, high-temperature heat energy generated in the working process of electric heating elements is taken away along specific heat exchange flow channels in electric heating containers by utilizing a path designed by a fluid thermodynamic principle, the temperature of the heated media is increased, and high-temperature media with process requirements are obtained at the outlets of the electric heaters.
The electric heater control system automatically adjusts the output power of the electric heater according to the current temperature and the expected temperature of the output port, so that the temperature of a medium of the output port is uniform at the expected temperature, specifically, the electric heater control system mainly controls the conduction angle of the controllable silicon through phase-shifting triggering to further control the output of voltage, so that the output power of the heating pipe can be adjusted, the temperature of the output port can be adjusted in a closed loop mode, however, the harmonic current generated through the phase-shifting triggering is extremely high, and the generated harmonic can influence the safe operation of other equipment.
Disclosure of Invention
The invention aims to provide a control method, a system and a device of an electric heater, which reduce the number of heating pipes of which the temperature can be adjusted only by adjusting the conduction angle of a silicon controlled rectifier by using two adjusting modes, and increase the conduction angle opening of the silicon controlled rectifier, thereby reducing the generation of harmonic current, avoiding the generation of safety influence on other equipment, and in addition, retaining part of the mode of adjusting the temperature of a position to be heated by adjusting the conduction angle of the silicon controlled rectifier, thereby ensuring the accuracy of temperature adjustment.
In order to solve the above technical problem, the present invention provides an electric heater control method, which is applied to a processor in a temperature adjustment system, wherein the temperature adjustment system further includes an electric heater provided with a plurality of heating pipes, and the electric heater control method includes:
dividing a plurality of heating pipes into two groups;
acquiring the current temperature of a position to be heated;
and adjusting the conduction angle of a silicon controlled rectifier connected with the first group of heating pipes and adjusting the number of the second group of heating pipes on the basis of the current temperature and the expected temperature so as to perform closed-loop adjustment on the temperature of the position to be heated, so that the temperature of the position to be heated is stabilized at the expected temperature.
Preferably, the temperature adjusting system further comprises a plurality of switches in one-to-one correspondence with each of the heating pipes in the second group of heating pipes, one end of each switch is connected with a power supply end of the heating pipe, and the other end of each switch is connected with an output end of the power supply;
adjusting the number of the second group of heating pipes to be electrified comprises the following steps:
determining the number of heating pipes needing to be powered on in the second group of heating pipes based on the current temperature and the expected temperature;
and controlling the switch corresponding to the heating pipe which needs to be electrified to be closed.
Preferably, the switch is an ac contactor or a solid state relay.
Preferably, the controlling the closing of the switch corresponding to the heating pipe which needs to be powered includes:
and controlling the closing of the alternating current contactor or the solid-state relay corresponding to the heating pipe which needs to be electrified and is determined by the PLC control logic.
Preferably, the temperature regulation system further comprises a plurality of switches, each switch corresponding to every three heating tubes in the second group of heating tubes, the switches being ac contactors or solid state relays;
the second group of heating pipes and the alternating current contactor or the solid-state relay are connected in the following mode: and connecting every three heating pipes in the second group of heating pipes into a triangular structure, and correspondingly connecting terminals of the triangular structure with terminals of the corresponding alternating current contactor or the corresponding solid-state contactor.
Preferably, the conduction angle of the controllable silicon is not smaller than a preset value.
Preferably, in an initial power-on period of the temperature regulation system, controlling to close a switch corresponding to the determined heating pipe needing power-on, includes:
grouping heating pipes needing to be electrified;
and controlling switches corresponding to each group of heating pipes to be electrified to be sequentially closed according to the time sequence.
Preferably, the method of controlling the switches corresponding to each group of heating pipes to be powered on to be sequentially closed according to the time sequence includes:
controlling a switch corresponding to a first heating pipe in the heating pipes needing to be electrified to be closed, and controlling a switch corresponding to a second heating pipe in the heating pipes needing to be electrified to be closed after a preset time until controlling a switch corresponding to a last heating pipe in the heating pipes needing to be electrified to be closed.
In order to solve the above technical problem, the present invention further provides an electric heater control system, which is applied to a processor in a temperature adjustment system, wherein the temperature adjustment system further includes an electric heater provided with a plurality of heating pipes, and the electric heater control system includes:
the grouping unit is used for dividing the heating pipes into two groups;
the acquisition unit is used for acquiring the current temperature of the position to be heated;
and the control unit is used for adjusting the conduction angle of the controllable silicon connected with the first group of heating pipes and adjusting the number of the second group of heating pipes on the basis of the current temperature and the expected temperature so as to perform closed-loop adjustment on the temperature of the position to be heated and stabilize the temperature of the position to be heated at the expected temperature.
In order to solve the above technical problem, the present invention further provides an electric heater control device, including:
a memory for storing a computer program;
a processor for implementing the steps of the electric heater control method described above when executing the computer program.
The application provides an electric heater control method, system and device, in the scheme, divide into two sets of with all heating pipes earlier, then when treating the temperature of heating position and adjusting, adjust the conduction angle of the silicon controlled rectifier of being connected with the first group heating pipe through the current temperature and the expectation temperature of treating the heating position to reach through adjusting the number of going up electricity to the second group heating pipe, in order to realize treating the closed loop regulation of heating position. Wherein, reduced the number that just can the temperature regulation heating pipe of conduction angle through adjusting the silicon controlled rectifier through using two kinds of regulation methods in this application, increased the conduction angle of silicon controlled rectifier simultaneously to reduced harmonic current's production, avoided producing the safety influence to other equipment, in addition, still remain partial through adjusting the mode that the temperature of silicon controlled rectifier conduction angle regulation waited to heat the position, thereby guaranteed temperature regulation's precision.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed in the prior art and the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method for controlling an electric heater according to the present invention;
FIG. 2 is a block diagram of an electric heater control system according to the present invention;
fig. 3 is a block diagram of an electric heater control device according to the present invention.
Detailed Description
The core of the invention is to provide a control method, a system and a device of an electric heater, which reduce the number of heating pipes of which the temperature can be adjusted only by adjusting the conduction angle of the controllable silicon by using two adjusting modes, and increase the conduction angle of the controllable silicon, thereby reducing the generation of harmonic current, avoiding the generation of safety influence on other equipment, and in addition, retaining part of the modes of adjusting the temperature of the position to be heated by adjusting the conduction angle of the controllable silicon, thereby ensuring the accuracy of temperature adjustment.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic flow chart of a method for controlling an electric heater according to the present invention, the method is applied to a processor in a temperature adjustment system, the temperature adjustment system further includes an electric heater having a plurality of heating pipes, and the method includes:
s11: dividing a plurality of heating pipes into two groups;
s12: acquiring the current temperature of a position to be heated;
s13: and adjusting the conduction angle of the controllable silicon connected with the first group of heating pipes and adjusting the number of the second group of heating pipes on the basis of the current temperature and the expected temperature so as to perform closed-loop adjustment on the temperature of the position to be heated and stabilize the temperature of the position to be heated at the expected temperature.
Considering that the conduction angle of the controllable silicon is controlled in a phase-shifting triggering mode in the prior art, and then the output power of the electric heater is adjusted, so that when the temperature output by the electric heater is adjusted, harmonic current is easily generated, the generation of the harmonic current can influence the normal operation of other equipment, and the safety is low.
In order to solve the above problems, the design idea of the present application is: a heating method is designed to reduce or eliminate harmonic current so as to minimize the influence of harmonic circuit on other devices.
Based on this, the electric heater control method is provided, firstly, all the heating pipes are divided into two groups, then when the temperature of the position to be heated is adjusted, the conduction angle of the controllable silicon connected with the first group of heating pipes is adjusted through the current temperature and the expected temperature of the position to be heated, so that the working power of the first group of heating pipes is adjusted, and the temperature of the position to be heated is adjusted. In addition, the number of the second group of heating pipes which are electrified is controlled to be adjusted, so that the position to be heated is adjusted. The larger the conduction angle of the silicon controlled rectifier is, the more obvious the corresponding heating of the first group of heating pipes is, and the more the number of the second group of heating pipes is, the more obvious the corresponding heating of the second group of heating pipes is. All heating pipes are controlled based on two control modes in the application, and the conduction angles of the silicon controlled rectifiers are not all adjusted, so that harmonic current can be reduced.
It should be noted that the output power of the corresponding first group of heating pipes can be adjusted by adjusting the conduction angle of the silicon controlled rectifier, so as to further realize the temperature adjustment; and the heating pipes in the second group work at fixed power after being electrified, and the power of each heating pipe is fixed, so that the total power of the whole second group of heating pipes is adjusted by changing the working number of the second group of heating pipes, and further the temperature is adjusted. In addition, it is understood in colloquial terms that the adjustment of the first group of heating pipes can be understood as a stepless adjustment and the adjustment of the second group of heating pipes as a stepped adjustment.
It should be noted that, although harmonic current is generated by controlling the conduction angle of the thyristor to regulate the temperature, the accuracy of the regulation of the temperature of the position to be heated is better, and therefore, a part of the method of regulating the temperature by regulating the conduction angle of the thyristor is reserved in the present application. That is, it can be understood that the magnitude of the harmonic current is in positive correlation with the number of the first group of heating pipes, but the accuracy of the temperature adjustment is in negative correlation with the number of the first group of heating pipes, the number of the first group of heating pipes can be selected according to actual conditions, and the accuracy can be, but not limited to, equal to the number of the second group of heating pipes, that is, the plurality of heating pipes are equally divided into two groups, and other implementation manners can be adopted, and the present application is not limited herein.
As a preferred embodiment, the conduction angle of the controllable silicon is not less than the preset value.
In addition, according to the experiment, the larger the conduction angle of the silicon controlled rectifier is, the smaller the harmonic current correspondingly generated is, especially when the conduction angle of the silicon controlled rectifier reaches a certain value, the generated harmonic current is extremely small, and the influence on other equipment is also small, so that the conduction angle of the silicon controlled rectifier is limited to be adjusted to be not less than a preset value in the application. Preferably, the preset value can be, but is not limited to, 80%, that is, the conduction angle of the thyristor can be controlled to be 80% -100%. Other suitable values are also possible, and the present application is not limited thereto.
The conduction angle of the controlled silicon is limited, so that harmonic current generated by the controlled silicon in the working process can be further reduced, normal operation of other equipment is further ensured, and the safety of the temperature adjusting system is improved.
To sum up, reduced the number that just can the temperature adjustment heating pipe through the conduction angle of adjusting the silicon controlled rectifier through using two kinds of regulation methods in this application, increased the conduction angle of silicon controlled rectifier simultaneously to reduce harmonic current's production, avoided producing the safety influence to other equipment, in addition, still remain partial through the mode of adjusting the temperature that the silicon controlled rectifier conduction angle was adjusted and is waited to heat the position, thereby guaranteed temperature regulation's precision.
On the basis of the above-described embodiment:
as a preferred embodiment, the temperature adjusting system further comprises a plurality of switches in one-to-one correspondence with each heating tube in the second group of heating tubes, one end of each switch is connected with the power supply end of the heating tube, and the other end of each switch is connected with the output end of the power supply;
adjusting the number of the second group of heating pipes to be electrified comprises the following steps:
determining the number of heating pipes needing to be electrified in the second group of heating pipes based on the current temperature and the expected temperature;
and controlling the switch corresponding to the heating pipe which needs to be electrified to be closed.
The embodiment aims to provide a specific way for adjusting the number of the second group of heating pipes to be electrified, and specifically, the number of the heating pipes to be electrified is determined according to the current temperature and the expected temperature, and then the corresponding switch of the heating pipes to be electrified is controlled to be closed, so that the power module can output power to the heating pipes through the switch, and the heating pipes are electrified. Similarly, the corresponding switch of the heating pipe which does not need to be electrified is controlled to be switched off, so that the power module can not output power to the heating pipe, and the heating pipe is powered off.
As a preferred embodiment, the switch is an ac contactor or a solid state relay.
Considering that the working scenario of the electric heater is usually 380V ac, the switch in this application may be, but is not limited to, an ac contactor or a solid-state contactor, and may also be other switching devices that can achieve the corresponding functions, and this application is not limited herein.
Therefore, the function of adjusting the number of the second group of heating pipes electrified can be realized by the method in the embodiment, and the realization method is simple and reliable.
As a preferred embodiment, controlling the closing of the switch corresponding to the heating pipe which is determined to need to be powered on includes:
and controlling the Logic to close the alternating current contactor or the solid state relay corresponding to the heating pipe which needs to be electrified and is determined by the PLC (Programmable Logic Controller).
Specifically, when the switch selects an ac contactor or a solid-state relay, the ac contactor or the solid-state relay may be controlled to be closed by a PLC control logic, or may be closed by another control logic, which is not limited herein.
In addition, the PLC control logic may be, but is not limited to, a PID (proportional-integral-derivative) regulation manner, and the present application is not limited thereto.
Further, the first and second groups of heat pipes in the present application may use two control logics using one processor to control them separately. The processors may include two processors (a first processor and a second processor), where the first processor adjusts a conduction angle of the thyristor corresponding to the first group of heating pipes, the second processor adjusts the number of the second group of heating pipes that are powered on, and the two processors respectively process the conduction angles, and each processor needs less data to operate, so that the processing speed can be increased, and the real-time performance of the temperature adjustment of the position to be heated can be increased.
As a preferred embodiment, the temperature adjustment system further includes a plurality of switches, each switch corresponding to every three heating tubes in the second group of heating tubes, the switches being ac contactors or solid state relays;
the connection mode of the second group of heating pipes and the alternating current contactor or the solid-state relay is as follows: and connecting every three heating pipes in the second group of heating pipes into a triangular structure, and correspondingly connecting the terminals of the triangular structure with the terminals of the corresponding alternating current contactor or solid-state contactor.
In particular, since the heating pipes are usually connected by means of cables, the present embodiment takes into account the fact that the cables required by the above-mentioned manner of connecting one switch per heating pipe are long, and the cost required is high to some extent.
Therefore, every 3 heating pipes in the second group of heating pipes are used as a group and connected into a triangular structure, and then 3 terminals of the triangular structure are correspondingly connected with 3 terminals of the solid-state contactor or the alternating current contactor, wherein the three terminals are respectively an A-phase terminal, a B-phase terminal and a C-phase terminal.
To sum up, through the mode in this application, every 3 heating pipes correspond a switch, and the quantity of the switch that needs to use is less, and has still practiced thrift the cable to a certain extent, has reduced temperature regulation system's cost.
As a preferred embodiment, in an initial stage of power-on of the temperature regulation system, controlling to close a switch corresponding to a heating pipe which is determined to need power-on, includes:
grouping heating pipes needing to be electrified;
and controlling switches corresponding to each group of heating pipes to be electrified to be sequentially closed according to the time sequence.
In the initial stage of power-on of the temperature regulation system, if the heating pipes needing power-on in the second group of heating pipes are controlled to be powered on simultaneously, the load is suddenly increased, that is, the load is started too much, the impact on the power supply and the system is large, and some devices in the system may be damaged.
Therefore, in the embodiment, in the initial stage of power-on, when the heating pipes in the second group are controlled to be powered on, the heating pipes in the second group are controlled to be sequentially powered on in groups, so that the load is gradually increased, the impact caused by sudden load increase can be reduced, the damage to devices in the system is avoided, and the reliability of the system is improved.
As a preferred embodiment, controlling switches corresponding to each group of heating pipes to be powered on to be sequentially turned on according to a time sequence includes:
controlling a switch corresponding to a first heating pipe in the heating pipes needing to be electrified to be closed, and controlling a switch corresponding to a second heating pipe in the heating pipes needing to be electrified to be closed after preset time until a switch corresponding to a last heating pipe in the heating pipes needing to be electrified is controlled to be closed.
Specifically, in this embodiment, it is preferable to control one heating tube to be powered on at a time, and there is a preset time until the next heating tube is powered on and the previous heating tube is powered on, so as to buffer the impact caused by the power on the previous heating tube. The preset time may be, but is not limited to, 5 min.
Specifically, when every 3 heating pipes in the second group of heating pipes are divided into one group, the first group is controlled to be electrified (3 are electrified), and the second group is controlled to be electrified at an interval of 5min until the last group needing to be electrified finishes electrification, so that electrification impact is reduced.
Referring to fig. 2, fig. 2 is a block diagram of a control system of an electric heater, which is applied to a processor in a temperature adjustment system, the temperature adjustment system further includes an electric heater with a plurality of heating pipes, and the control system includes:
a grouping unit 21 for grouping the plurality of heating pipes into two groups;
an acquisition unit 22 for acquiring a current temperature of the position to be heated;
and the control unit 23 is configured to adjust a conduction angle of the thyristor connected to the first group of heating tubes and adjust the number of the second group of heating tubes to perform closed-loop adjustment on the temperature of the position to be heated, so that the temperature of the position to be heated is stabilized at the desired temperature.
For the introduction of the electric heater control system, please refer to the above embodiments, which are not described herein again.
Referring to fig. 3, fig. 3 is a block diagram of an electric heater control device provided in the present invention, the device includes:
a memory 31 for storing a computer program;
the processor 32, when executing the computer program, is adapted to carry out the steps of the above-described electric heater control method.
For the introduction of the electric heater control device, please refer to the above embodiments, which are not described herein again.
It is to be noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A control method of an electric heater is characterized in that the control method is applied to a processor in a temperature regulation system, the temperature regulation system also comprises the electric heater provided with a plurality of heating pipes, and the control method comprises the following steps:
dividing a plurality of heating pipes into two groups;
acquiring the current temperature of a position to be heated;
and adjusting the conduction angle of a silicon controlled rectifier connected with the first group of heating pipes and adjusting the number of the second group of heating pipes on the basis of the current temperature and the expected temperature so as to perform closed-loop adjustment on the temperature of the position to be heated, so that the temperature of the position to be heated is stabilized at the expected temperature.
2. The electric heater control method of claim 1, wherein the temperature regulation system further comprises a plurality of switches in one-to-one correspondence with each of the heating tubes in the second group of heating tubes, one end of the switch being connected to a power supply end of the heating tube, the other end of the switch being connected to an output end of the power supply;
adjusting the number of the second group of heating pipes to be electrified comprises the following steps:
determining the number of heating pipes needing to be powered on in the second group of heating pipes based on the current temperature and the expected temperature;
and controlling the switch corresponding to the heating pipe which needs to be electrified to be closed.
3. The electric heater control method of claim 2, wherein the switch is an ac contactor or a solid state relay.
4. The electric heater control method of claim 3, wherein controlling the switch corresponding to the heating tube determined to be powered on to close comprises:
and controlling the closing of the alternating current contactor or the solid-state relay corresponding to the heating pipe which needs to be electrified and is determined by the PLC control logic.
5. The electric heater control method of claim 1, wherein the temperature regulation system further comprises a plurality of switches, each switch corresponding to every three heater tubes in the second group of heater tubes, the switches being ac contactors or solid state relays;
the second group of heating pipes and the alternating current contactor or the solid-state relay are connected in the following mode: and connecting every three heating pipes in the second group of heating pipes into a triangular structure, and correspondingly connecting terminals of the triangular structure with terminals of the corresponding alternating current contactor or the corresponding solid-state contactor.
6. The electric heater control method as claimed in claim 1, wherein a conduction angle of the silicon controlled rectifier is not less than a preset value.
7. The electric heater control method according to any one of claims 2 to 6, wherein controlling the switch corresponding to the heating tube determined to be powered on to be closed at the initial stage of the power-on of the temperature regulation system comprises:
grouping heating pipes needing to be electrified;
and controlling switches corresponding to each group of heating pipes to be electrified to be sequentially closed according to the time sequence.
8. The method for controlling an electric heater according to claim 7, wherein the step of controlling the switches corresponding to each group of heating tubes to be powered on to be sequentially turned on according to the time sequence comprises:
controlling a switch corresponding to a first heating pipe in the heating pipes needing to be electrified to be closed, and controlling a switch corresponding to a second heating pipe in the heating pipes needing to be electrified to be closed after a preset time until controlling a switch corresponding to a last heating pipe in the heating pipes needing to be electrified to be closed.
9. An electric heater control system, characterized in that, be applied to the treater in the temperature regulation system, the temperature regulation system still includes the electric heater that is equipped with a plurality of heating pipes, includes:
the grouping unit is used for dividing the heating pipes into two groups;
the acquisition unit is used for acquiring the current temperature of the position to be heated;
and the control unit is used for adjusting the conduction angle of the controllable silicon connected with the first group of heating pipes and adjusting the number of the second group of heating pipes on the basis of the current temperature and the expected temperature so as to perform closed-loop adjustment on the temperature of the position to be heated and stabilize the temperature of the position to be heated at the expected temperature.
10. An electric heater control apparatus, comprising:
a memory for storing a computer program;
a processor for implementing the steps of the electric heater control method according to any one of claims 1-8 when executing the computer program.
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| CN202111405371.4A CN114115386A (en) | 2021-11-24 | 2021-11-24 | Electric heater control method, system and device |
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| CN206639071U (en) * | 2017-03-24 | 2017-11-14 | 重庆市计量质量检测研究院 | A kind of electric heating system that automatic packet control is carried out according to rate-of flow |
| CN209496293U (en) * | 2019-03-11 | 2019-10-15 | 上海盛剑环境系统科技股份有限公司 | A kind of dust collector ash hopper electric heating control device |
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