Modular temperature-controlled heating device based on zoned control

Abstract

The utility model discloses a modularization temperature control heating device based on zoning control belongs to industrial automation control equipment technical field, and the device includes box and sets up the mounting base plate in the box, is provided with the DIN guide rail on the mounting base plate, and each electrical element is installed on the DIN guide rail according to the functional zoning, and constitutes modularization circuit structure through electrical connection. The functional zoning includes power input module, conversion and control module, drive execution unit and load feedback module. Among them, the PLC controller in conversion and control module receives the temperature feedback signal from the temperature sensing wire in load feedback module, and compares with the set value, and then through the on-off of control drive execution unit, realizes the closed loop control to the heating tube. The utility model discloses through modularization zoning layout, has solved the traditional heating equipment wiring confusion, the problem of uneven heat dissipation, poor versatility, has the advantages such as clear structure, convenient maintenance, high reliability and good security.

Description

Technical Field

[0001] This utility model belongs to the field of industrial automation control equipment technology, specifically relating to a modular temperature control heating device based on zone control. Background Technology

[0002] Traditional heating equipment control circuits typically have components such as thermostats, contactors, and circuit breakers loosely installed inside the control box, resulting in complex wiring and a tangled web of wires. This structure has the following disadvantages: 1. Messy wiring: This makes troubleshooting difficult and can easily lead to short circuits or poor connections; 2. Uneven heat dissipation: Heat accumulates in concentrated areas of high-current components, affecting their lifespan; 3. Poor versatility: The circuit layout is fixed, making it difficult to quickly adapt to different heating power requirements; 4. Low security: The isolation between strong and weak currents is unclear, which poses interference and safety hazards. Utility Model Content

[0003] To address the problems mentioned in the background section, this invention provides a modular temperature control heating device based on zoned control, which features a reasonable layout, standardized wiring, efficient heat dissipation, and easy maintenance.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A modular temperature-controlled heating device based on zoned control is provided, comprising a housing and a mounting base plate disposed within the housing. A DIN rail is provided on the mounting base plate, and various electrical components are installed on the DIN rail according to functional zones, forming a modular circuit structure through electrical connections. This structure includes: The power input module is located in the upper area of ​​the mounting base plate and includes power input terminals for introducing power. The conversion and control module includes a DC power supply and a PLC controller; the input terminal of the DC power supply is connected to the power input module for converting AC power to DC power; the PLC controller is connected to the output terminal of the DC power supply and serves as the control core of the device. The drive execution unit includes at least one intermediate relay controlled by the PLC controller, and an AC contactor and / or a solid-state relay driven by the intermediate relay. The load feedback module includes a heating element connected to the output terminal of the heating element, and a temperature sensing wire connected to the PLC controller; The PLC controller is configured to receive the feedback signal from the temperature sensing wire, compare it with a set value, and then control the on / off state of the drive execution unit to achieve closed-loop control of the heating element.

[0005] Furthermore, the power input module also includes a main circuit breaker, and the AC contactor is connected in series in the main circuit between the main circuit breaker and the output terminal of the heating element.

[0006] Furthermore, it also includes a signal auxiliary module, which includes control buttons, an emergency stop button, a mute / reset button, and a signal terminal block XT2. The signal auxiliary module is connected to the PLC controller and is used to input control signals and emergency signals to the PLC controller.

[0007] Furthermore, all electrical components are wired through cable trays and electrically connected via terminal interfaces.

[0008] Furthermore, the input terminal of the DC power supply is connected to the power input module, and its output DC power supplies the signal circuits of the PLC controller, intermediate relay, and temperature sensing wire.

[0009] Furthermore, the various modules of the device are partitioned and arranged on the mounting base plate, and the power input module, conversion and control module, drive execution unit and load feedback module are physically isolated according to the current flow direction and the signal flow direction.

[0010] Furthermore, an insulating partition is provided between the drive execution unit and the conversion and control module.

[0011] Furthermore, the side wall of the enclosure is equipped with a cooling fan, and the top and / or bottom are provided with ventilation holes.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. Modular layout: Circuit units with similar functions are grouped together and partitioned, resulting in a clear structure that facilitates quick identification and maintenance.

[0013] 2. Optimize heat dissipation: Place components that generate a lot of heat (such as solid-state relays and contactors) in well-ventilated areas and keep them at an appropriate distance from temperature-sensitive components such as temperature controllers to improve system reliability.

[0014] 3. Safe and reliable: Through physical isolation and clear partitioning, interference between strong and weak currents is effectively reduced, improving the system's anti-interference capability and operational safety.

[0015] 4. High versatility: The modular design based on the guide rail makes it very convenient to replace components and upgrade and expand the system, adapting to different heating control needs. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a front view of the internal layout of the box of this utility model; In the diagram: 1. Housing; 2. DIN rail; 3. Mounting base plate; 4. Insulating partition; 5. Cable tray; 100. Power input module; 200. Conversion and control module; 201. DC power supply; 202. PLC controller; 300. Drive execution unit; 301. Intermediate relay; 302. AC contactor; 303. Solid state relay; 400. Load feedback module; 401. Heating element; 402. Temperature sensing wire; 500. Signal auxiliary module. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1 This utility model provides the following technical solution: A modular temperature control heating device based on zoned control is provided, including a housing 1 and a mounting base 3 disposed within the housing 1. A DIN rail 2 is provided on the mounting base 3. Electrical components are installed on the DIN rail 2 according to functional zones and are electrically connected to form a modular circuit structure. This structure includes: The power input module 100 is located in the upper area of ​​the mounting base plate 3 and includes a power input terminal X1 for introducing power. The power input module 100 serves as the main power input of the system and is connected to three-phase power, neutral (N) and ground (PE) through the power input terminal. It is also equipped with a main circuit breaker for overload and short circuit protection.

[0019] The conversion and control module 200 includes a DC power supply 201 and a PLC controller 202. The input terminal of the DC power supply 201 is connected to the power input module 100 to convert AC power to DC power. The PLC controller 202 is connected to the output terminal of the DC power supply 201 and serves as the control core of the device. The conversion and control module 200 is the "brain" of the system. The DC power supply in it is drawn from the power input module 100 and converted into a stable DC 24V voltage to power the PLC controller 202, sensors, and other low-voltage devices. The PLC controller 202, as the core logic processor, is responsible for processing all input signals and issuing control commands.

[0020] The drive execution unit 300 includes at least one intermediate relay 301 controlled by the PLC controller 202, and an AC contactor 302 and / or a solid-state relay 303 driven by the intermediate relay 301. The drive execution unit 300 acts as the "hands and feet" of the system, comprising the intermediate relay 301 and the AC contactor 302 or solid-state relay 303 driven by it. The low-power output signal of the PLC controller 202 drives the intermediate relay 301, which in turn controls the coil of the AC contactor 302, thereby switching the high-current main circuit to the heating element on and off. For scenarios requiring precise temperature control, the solid-state relay 303 can be used directly.

[0021] The load feedback module 400 includes a heating element 401 connected via heating element output terminals (P1, P2...Pn) and a temperature sensing wire 402 connected to the PLC controller 202; the load feedback module 400 acts as the system's "sensor." The temperature sensing wire 402 monitors the temperature of the heating zone in real time and feeds the signal back to the PLC controller 202, comparing it with a set value. This, in turn, controls the on / off state of the drive execution unit 300, achieving closed-loop control of the heating element 401. The heating element, as the execution end, converts electrical energy into heat energy.

[0022] The various modules of the device are partitioned and arranged on the mounting base plate 3. The power input module 100, conversion and control module 200, drive execution unit 300, and load feedback module 400 are physically isolated according to the current flow direction and signal flow direction. Modular design not only facilitates maintenance but also facilitates configuration changes (such as adding or reducing the number of heating elements, which only requires expansion in the corresponding module, rather than rewiring).

[0023] The power input module 100 also includes a main circuit breaker QF1, and an AC contactor 302 connected in series in the main circuit between the main circuit breaker QF1 and the output terminals (P1, P2...Pn) of the heating element.

[0024] It also includes a signal auxiliary module 500 for human-machine interaction and external signal input. This module includes a control button SB1, an emergency stop button SB2, a mute / reset button SB3, and a signal terminal block XT2. The signal auxiliary module 500 is connected to the PLC controller 202 and is used to input control signals and emergency signals to the PLC controller 202. The emergency stop button, mute button, etc., are all connected to the signal auxiliary module 500, which can directly send emergency signals to the PLC controller 202 to ensure system safety.

[0025] All electrical components are wired through cable tray 5 and electrically connected via terminal interfaces.

[0026] The input terminal of DC power supply 201 is connected to power input module 100, and its output DC power supplies the signal circuits of PLC controller 202, intermediate relay 301 and temperature sensing wire 402.

[0027] An insulating partition 4 is provided between the drive execution unit 300 and the conversion and control module 200. The insulating partition 4 can be made of bakelite or epoxy resin board, etc.

[0028] The side wall of the enclosure 1 is equipped with a cooling fan, and the top and / or bottom are provided with ventilation holes to form a convection airflow channel and enhance the heat dissipation effect.

[0029] The system workflow of this utility model is as follows: Phase power is introduced through the input terminal X1 of the power input module 100 and the main circuit breaker QF1. One path directly supplies the AC contactor 302 of the drive execution unit 300; the other path supplies the DC power 201 of the conversion and control module 200.

[0030] DC power supply 201 outputs DC24V to power the signal circuits of PLC controller 202, intermediate relay 301 coil and temperature sensing wire 402.

[0031] The PLC controller 202 reads the temperature sensing wire 402 in real time and transmits the detected signal to the PLC controller 202. When the temperature is lower than the set value, the PLC controller 202 outputs a signal to activate the intermediate relay 301. The normally open contact of the intermediate relay 301 then controls the coil of the AC contactor 302 to be energized, causing the main contacts of the AC contactor 302 to close, connecting the three-phase power supply, and the heating element 401 to start heating.

[0032] When the temperature sensor 402 detects that the temperature has reached the set value, the PLC controller 202 disconnects its output, and the intermediate relay 301 and AC contactor 302 disconnect in sequence, stopping the heating. This cycle repeats to achieve automatic constant temperature control.

[0033] All electrical connections are neatly laid through cable trays 5, with strong and weak current lines arranged separately to minimize interference.

[0034] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A modular temperature-controlled heating device based on zone control, comprising a housing (1) and a mounting base plate (3) disposed within the housing (1), characterized in that, The mounting base plate (3) is provided with DIN rails (2), and each electrical component is installed on the DIN rails (2) according to its functional area, and forms a modular circuit structure through electrical connection. This structure includes: The power input module (100) is located in the upper area of ​​the mounting base plate (3) and includes a power input terminal (X1) for introducing power. The conversion and control module (200) includes a DC power supply (201) and a PLC controller (202); the input terminal of the DC power supply (201) is connected to the power input module (100) and is used to convert AC power into DC power; the PLC controller (202) is connected to the output terminal of the DC power supply (201) and serves as the control core of the device. The drive execution unit (300) includes at least one intermediate relay (301) controlled by the PLC controller (202), and an AC contactor (302) and / or a solid-state relay (303) driven by the intermediate relay (301). The load feedback module (400) includes a heating element (401) connected via a heating element output terminal (P1, P2...Pn) and a temperature sensing wire (402) connected to the PLC controller (202). The PLC controller (202) is configured to receive the feedback signal from the temperature sensing line (402), compare it with the set value, and then control the on / off state of the drive execution unit (300) to realize closed-loop control of the heating tube (401).

2. The modular temperature control heating device based on zone control according to claim 1, characterized in that, The power input module (100) also includes a main circuit breaker (QF1), and the AC contactor (302) is connected in series in the main circuit between the main circuit breaker (QF1) and the output terminals (P1, P2...Pn) of the heating element.

3. The modular temperature control heating device based on zone control according to claim 1, characterized in that, It also includes a signal auxiliary module (500), which includes a control button (SB1), an emergency stop button (SB2), a mute / reset button (SB3) and a signal terminal block (XT2). The signal auxiliary module (500) is connected to the PLC controller (202) and is used to input control signals and emergency signals to the PLC controller (202).

4. The modular temperature control heating device based on zone control according to claim 1, characterized in that, All electrical components are wired through the cable tray (5) and electrically connected via terminal interfaces.

5. A modular temperature control heating device based on zone control according to claim 1, characterized in that, The input terminal of the DC power supply (201) is connected to the power input module (100), and the DC power output therefrom supplies power to the signal circuits of the PLC controller (202), intermediate relay (301) and temperature sensing wire (402).

6. A modular temperature control heating device based on zone control according to claim 1, characterized in that, The various modules of the device are partitioned and arranged on the mounting base plate (3). The power input module (100), conversion and control module (200), drive execution unit (300) and load feedback module (400) are physically isolated according to the current flow direction and the signal flow direction.

7. A modular temperature control heating device based on zone control according to claim 6, characterized in that, An insulating partition (4) is provided between the drive execution unit (300) and the conversion and control module (200).

8. The apparatus according to any one of claims 1 to 7, characterized in that, The side wall of the enclosure (1) is provided with a cooling fan, and the top and / or bottom are provided with cooling holes.

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