Novel control system of electric heater

Abstract

The utility model belongs to the technical field of electrical automation control, and discloses a novel control system of an electric heater, which comprises an intelligent control module, a man-machine interaction module, an execution module and a temperature sensor, the man-machine interaction module is in bidirectional connection with the intelligent control module, a signal output end of the intelligent control module is connected with a signal input end of the execution module, and the execution module is used for outputting target temperature. The problem that the cost is high due to the fact that the heater is completely controlled through the silicon controlled rectifier is solved, the heater is effectively protected, frequent impact on a power grid is reduced, and the temperature can be accurately controlled.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrical automation control technical field, more specifically, relate to a new type control system of electric heater. BACKGROUND

[0002] Electric heater is a common heating equipment, is widely used in industrial production and life, in the control aspect of electric heater, the traditional mode is through temperature switch, utilizes the bit type adjustment to control the start and stop of electric heater, or is all through the power of heater controlled by thyristor, the former when temperature approaches target value, will make electric heater frequently start and stop, not only greatly influences the precision of temperature control, also will produce the impact to the power grid, the latter although can accurate temperature control through all thyristor adjustment, but control cost is very high.

[0003] In order to solve the above problem, the utility model provides a new type control system of electric heater. UTILITY MODEL CONTENT

[0004] The utility model provides the following technical scheme: a new type control system of electric heater, including intelligent control module, still including man -machine interface module, execution module and temperature sensor, the output of temperature sensor is connected in the signal input of intelligent control module, man -machine interface module and intelligent control module are connected between two -way, the signal output of intelligent control module is connected in the signal input of execution module, execution module is used for output target temperature.

[0005] Through the above technical scheme, utilize the combination mode of fixed group and adjustable group, through program optimization control, effectively protected the heater itself, reduced the frequent impact to the power grid, and can accurate control temperature.

[0006] Further, the temperature sensor is used for monitoring outlet temperature and the temperature of each monitoring sub-region, and is transmitted to the intelligent control module in real time.

[0007] Through the above technical scheme, realize intelligent control.

[0008] Further, the man -machine interface module is used for providing intelligent electric heater operation monitoring parameter setting interface for user, and after accepting the set value control instruction of user setting, carries out corresponding monitoring, wherein operation monitoring parameter includes outlet temperature and each monitoring sub-region temperature display, outlet target temperature set value, power set value, hand automatic switching, system start and stop, alarm value setting and alarm display.

[0009] Through the above technical scheme, realize intelligent operation.

[0010] Further, the execution module includes a control fixed group of contactors and a control adjustable group of thyristors, and the total power of the adjustable group is greater than the power of a single fixed group.

[0011] By the above technical solution, the combination of the fixed group and the adjustable group effectively protects the heater itself and reduces the frequent impact on the power grid.

[0012] Further, the intelligent control module is a PLC, the temperature sensor transmits the collected target medium temperature and temperature information of each monitoring sub-region of the heater control region to the intelligent control module, and compares and processes the preset parameters to obtain a compensation index and a fault monitoring index required for the target medium to reach the required target temperature, and the intelligent control module effectively allocates the compensation index and the fault monitoring index to the fixed group and the adjustable group, so as to perform corresponding processing, and the nodes for opening and closing the fixed group are not at the same position through the stepping program.

[0013] By the above technical solution, the frequent start and stop is avoided, the service life of the heater is prolonged, and the target temperature of the medium is accurately controlled.

[0014] In summary, the utility model has the following beneficial technical effects:

[0015] 1. The utility model discloses a stepping program for opening and closing the nodes of the fixed group, so that the electric heater does not frequently start and stop when the measured temperature approaches the target value, and the fixed group is only used for preliminary adjustment, and the accurate temperature control is realized by the adjustable group, thereby effectively protecting the heater itself, prolonging the service life of the heater, reducing the frequent impact on the power grid, and solving the problems of frequent start and stop of the electric heater when the measured temperature approaches the target value, high cost of controlling the heater through the thyristor, effectively protecting the heater itself, reducing the frequent impact on the power grid, and accurately controlling the temperature. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The utility model discloses a structure schematic diagram.

[0017] Mark explanation in the drawing: 1, intelligent control module;2, execution module;3, temperature sensor;4, man-machine interaction module. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model;Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments, and all other embodiments obtained by those skilled in the art without creative labor based on the embodiments in the utility model belong to the protection scope of the utility model.

[0019] In the description of the utility model, it is explained that, the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0020] In the description of the utility model, it is explained that, unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be broadly understood, for example, "connected" can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, and can be connected inside two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0021] Embodiment:

[0022] The utility model embodiment discloses a novel control system of electric heater, please refer to Figure 1 , including intelligent control module 1 still includes man -machine interface module 4, execution module 2 and temperature sensor 3, temperature sensor 3's output end is connected in intelligent control module 1's signal input, man -machine interface module 4 and intelligent control module 1 between two-way connection, intelligent control module 1's signal output is connected in execution module 2's signal input, and execution module 2 is used to output target temperature, temperature sensor 3 is used to monitor outlet temperature and the temperature of each monitoring subarea, and real time transmission is given to intelligent control module 1, man -machine interface module 4 is used to provide intelligent electric heater operation monitoring parameter setting interface for user, and after accepting the set value control instruction of user setting, corresponding monitoring is carried out, wherein operation monitoring parameter includes outlet temperature and the temperature display of each monitoring subarea, outlet target temperature set value, power set value, hand automatic switching, system start-stop, alarm value setting and alarm display, realize intelligent control operation, and the working efficiency is higher, and execution module 2 includes the contactor of control fixed group and the controllable silicon of control adjustable group, and the total power of adjustable group is greater than the power of single fixed group.

[0023] Please refer to Figure 1The intelligent control module 1 is PLC, the intelligent control module 1 can configure CPU, IO module, analog quantity module and communication interface according to the type of the electric heater actually controlled, the temperature sensor 3 transmits the collected target medium temperature and the temperature information of each monitoring sub-region in the heater control region to the intelligent control module 1, compares and processes the preset parameters, obtains the compensation index and the fault monitoring index required for the target medium to reach the required target temperature, and effectively distributes the compensation index and the fault monitoring index to the fixed group and the adjustable group, so that corresponding processing is carried out, and the combination of the fixed group and the adjustable group greatly saves the control cost, the nodes for opening and closing the fixed group are not in the same position through the stepping program, frequent start and stop are avoided, the service life of the heater is prolonged, the target temperature of the medium is accurately controlled, and the impact on the power grid is reduced.

[0024] The implementation principle of the embodiment of the utility model is that the temperature sensor 3 is used for monitoring the outlet temperature and the temperature of each monitoring sub-region and transmitting in real time to the intelligent control module 1, the man-machine interaction module 4 is used for providing the intelligent electric heater operation monitoring parameter setting interface for the user, and corresponding monitoring is carried out after the setting value control instruction set by the user is accepted, wherein the operation monitoring parameters include the outlet temperature and the temperature display of each monitoring sub-region, the outlet target temperature setting value, the power setting value, the manual-automatic switching, the system start-stop, the alarm value setting and the alarm display, intelligent control operation is realized, the intelligent control module 1 can configure CPU, IO module, analog quantity module and communication interface according to the type of the electric heater actually controlled, the temperature sensor 3 transmits the collected target medium temperature and the temperature information of each monitoring sub-region in the heater control region to the intelligent control module 1, compares and processes the preset parameters, obtains the compensation index and the fault monitoring index required for the target medium to reach the required target temperature, and effectively distributes the compensation index and the fault monitoring index to the fixed group and the adjustable group, so that corresponding processing is carried out, and the combination of the fixed group and the adjustable group greatly saves the control cost, the nodes for opening and closing the fixed group are not in the same position through the stepping program, frequent start and stop are avoided, the service life of the heater is prolonged, the target temperature of the medium is accurately controlled, and the impact on the power grid is reduced.

[0025] The above are preferable embodiments of the utility model, not limit the protection scope of the utility model, therefore: all equivalent changes made according to the structure, shape, principle of the utility model should be covered in the protection scope of the utility model.

Claims

1. A new control system for electric heaters, comprising an intelligent control module (1), characterized in that: It also comprises a human-computer interaction module (4), an execution module (2) and a temperature sensor (3), the output end of the temperature sensor (3) is connected to the signal input end of the intelligent control module (1), the human-computer interaction module (4) and the intelligent control module (1) are bidirectionally connected, the signal output end of the intelligent control module (1) is connected to the signal input end of the execution module (2), and the execution module (2) is used for outputting a target temperature.

2. The novel control system for electric heater according to claim 1, characterized in that: The temperature sensor (3) is used for monitoring the outlet temperature and the temperature of each monitoring sub-region and transmitting the same to the intelligent control module (1) in real time.

3. The novel control system for electric heater according to claim 1, characterized in that: The execution module (2) comprises a fixed group of contactors and a controllable silicon of an adjustable group, and the total power of the adjustable group is greater than the power of a single fixed group.

4. The novel control system for electric heater according to claim 1, characterized in that: The intelligent control module (1) is a PLC.

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