Infrared heating control device

Abstract

The utility model relates to heating control equipment technical field, and disclose an infrared heating control device, including host computer and at least one control box, host computer passes through communication line and realizes data interaction and control signal transmission with control box, host computer is the hardware equipment of adaptation Windows system, is equipped with control screen, power connection, communication interface and USB interface, supports temperature curve to look over and exports, its operating system contains system setting, curve document import, heating mode switching function, can customize target temperature, heating time etc. Parameter, also support AT self -tuning and PID parameter control, be equipped with heavy load aviation joint, buzzer, total power switch, start -stop button and temperature control meter head on control box, be equipped with switching power supply, power controller, heating loop mutual inductor and relay in the inside, and the relay can realize remote start -stop and alarm. The device realizes remote control, reduces the field operation, realizes power accurate regulation and loop monitoring.

Description

Technical Field

[0001] This utility model relates to the field of heating control equipment technology, specifically to an infrared heating control device. Background Technology

[0002] In fields such as industrial production and scientific experiments, precise control and stable regulation of temperature are key requirements for ensuring process quality and the reliability of experimental results.

[0003] Traditional infrared heating equipment often suffers from problems such as limited control methods, low regulation precision, and inconvenient monitoring of operational status. Some devices only support simple constant temperature control, failing to meet the process requirements of multi-stage temperature changes; others require on-site parameter adjustments, making remote control difficult and increasing operational complexity and labor costs. Furthermore, traditional equipment lacks a robust status feedback and alarm mechanism, failing to provide timely warnings when the heating circuit malfunctions or exceeds temperature limits, potentially leading to equipment damage or experimental / production accidents. Therefore, we propose an infrared heating control device to address these issues. Utility Model Content

[0004] The purpose of this utility model is to provide an infrared heating control device to solve the problems mentioned in the background art, such as low control accuracy, inconvenient operation status monitoring, inability to meet the process requirements of multi-stage temperature changes, lack of perfect status feedback and alarm mechanism, and inability to provide timely warnings when the heating circuit is abnormal or the temperature exceeds the limit, which may lead to equipment damage or experimental or production accidents.

[0005] This utility model provides the following technical solution:

[0006] An infrared heating control device includes a main unit and at least one control box. The main unit and the control box communicate with each other via a 485 communication line to exchange data and transmit control signals. The main unit is a hardware device adapted to the Windows system and is equipped with a control screen, a power interface, a communication interface and a USB interface.

[0007] The control box is equipped with a heavy-duty aviation connector, a buzzer, a main power switch, a start button, a stop button, and a temperature control meter. The heavy-duty aviation connector is used for detachable connection with an external infrared heating device. The host can set and monitor the operating parameters of the control box to achieve remote control of the heating process of the infrared heating device.

[0008] Preferably, the control box includes a switching power supply, a power controller, a heating circuit transformer, and a relay; the switching power supply has a single-phase 220V input and an output of 24V 2.5A; the power controller is connected to a temperature control meter; the heating circuit transformer is used to detect the status of the heating circuit; and the contacts of the relay can realize the remote control system start, stop, and alarm functions.

[0009] Preferably, the host supports viewing and exporting temperature curves, and its operating system includes a system settings page, a curve temperature document import page, a heating mode switching function, a curve preview function, an AT self-tuning function, and a PID parameter reading and control function; the system settings page allows customization of the target temperature, heating time, holding time, and output power for each mode; the curve temperature document import page supports importing preset temperature curve documents in CSV format from an XLS worksheet.

[0010] Preferably, the heating modes include open-loop power mode, curve temperature mode, constant temperature mode, and unlimited open-loop power mode; the open-loop power mode allows setting the light-on duration, light-off duration, and number of cycles, and operates according to preset power, heating time, cooling time, and number of cycles without being affected by temperature feedback; the curve temperature mode allows manual setting or import of multiple temperature curves, each of which includes a target temperature, heating time, and holding time; the constant temperature mode maintains a preset temperature constant, and the target temperature can be directly adjusted on the main page of the host; the unlimited open-loop power mode allows setting a fixed output power or modifying the output power in real time, and the device runs continuously until it automatically stops.

[0011] Preferably, the temperature controller can display PV and SV, and the SV value can be changed by pressing a button; the temperature controller is equipped with a status indicator light; the temperature controller also supports manual mode setting, automatic tuning, ramp-heat preservation setting and execution, alarm parameter setting, and sensor type setting.

[0012] Preferably, the 485 communication line is a twisted-pair shielded cable, and the 485 communication line meets specific communication specifications.

[0013] This utility model has the following beneficial effects:

[0014] 1. This infrared heating control device enables remote parameter setting and status monitoring of the infrared heating device through a 485 communication connection between the host and the control box, reducing the need for on-site operation and improving the convenience of control. At the same time, the power controller and heating circuit current transformer components in the control box ensure accurate adjustment of heating power and real-time monitoring of circuit status, improving the stability and safety of the heating process.

[0015] 2. The main unit supports multiple heating modes and temperature curve viewing and export functions, which can meet the heating needs of different scenarios and facilitate subsequent process analysis; the AT self-tuning and PID parameter adjustment functions of the operating system can further optimize the temperature control accuracy and adapt to the temperature control needs under different loads and process conditions.

[0016] 3. The temperature controller has the functions of temperature display, parameter adjustment and status indication. Together with the buzzer, relay and other components of the control box, it forms a complete on-site control and abnormal alarm mechanism. The 485 communication line adopts twisted pair shielded cable and meets specific communication specifications, which ensures the stability and accuracy of data transmission between the host and the control box and avoids control abnormalities caused by communication interference. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall equipment connection of this utility model.

[0018] Figure 2 This is a schematic diagram of the host structure of this utility model.

[0019] Figure 3 This is a schematic diagram of the control box structure of this utility model.

[0020] Figure 4 The flowchart for setting up the temperature controller of this utility model is shown.

[0021] Figure 5 This is the control circuit diagram of the infrared heating control device of this utility model.

[0022] In the diagram: 1. Main unit; 11. Control screen; 12. Power interface; 13. Communication interface; 14. USB interface; 2. Control box; 21. Heavy-duty aviation connector; 22. Buzzer; 23. Main power switch; 24. Start button; 25. Stop button; 26. Temperature controller; 3. Infrared heating device. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1 - Figure 3As shown, an infrared heating control device includes a host 1 and at least one control box 2. The host 1 and the control box 2 communicate via a 485 communication line to achieve data interaction and control signal transmission, ensuring stable transmission of instructions and status data between them. The host 1 is a hardware device adapted to the Windows system and is equipped with a control screen 11, a power interface 12, a communication interface 13, and a USB interface 14. The control screen 11 is used to display the operation interface, temperature curve, and device status, facilitating parameter setting and mode switching for users. The power interface 12 provides power to the host, the communication interface 13 is used to connect the 485 communication line, and the USB interface 14 can be used for data export or external device expansion.

[0025] The 485 communication line uses twisted-pair shielded cable, which effectively reduces the impact of external electromagnetic interference on communication signals, ensuring the stability of data transmission between host 1 and control box 2. This 485 communication line meets specific communication specifications, including compliance with EIARS-485 electrical specifications, a 2-wire half-duplex serial communication mode, start-stop synchronization, and a maximum communication distance of 500m, adaptable to equipment layouts in large spaces. Communication speeds are selectable at 9600bps, 19200bps, 38.4kbps, and 115.2kbps, allowing users to choose the appropriate speed based on communication distance and data volume requirements. The data format is 8 data bits long and 1 stop bit, with parity checks selectable as none, even, or odd. Error detection uses CRC-16, and the transmission code is a HEX value, further ensuring the accuracy of communication data and reducing control anomalies caused by data transmission errors.

[0026] The control box 2 is equipped with a heavy-duty aviation connector 21, a buzzer 22, a main power switch 23, a start button 24, a stop button 25, and a temperature controller 26. The heavy-duty aviation connector 21 is used for detachable connection with the external infrared heating device 3, ensuring a stable connection and facilitating disassembly and maintenance. This allows the control box 2 to output control signals to the infrared heating device 3 to adjust its heating status. The buzzer 22 is used to issue an alarm when the equipment malfunctions (such as exceeding the temperature limit). The main power switch 23 controls the overall power supply of the control box 2. The start button 24 and stop button 25 are used for on-site start and stop heating operations. The temperature controller 26 is used to display temperature data and adjust basic parameters. The host unit 1 can set and monitor the operating parameters of the control box 2 (such as target temperature, heating time, and output power) to achieve remote control of the heating process of the infrared heating device 3, reducing the need for on-site operation.

[0027] The control box 2 contains a switching power supply, a power controller, a heating circuit transformer, and relays. The switching power supply has a single-phase 220V input and an output of 24V 2.5A, providing stable power to the relays, temperature controller 26, and other components inside the control box 2. The power controller is connected to the temperature controller 26, receiving the control signal output by the temperature controller 26 and precisely adjusting the output power of the infrared heating device 3. The heating circuit transformer is used to detect the current and other status parameters of the heating circuit, providing real-time feedback on the circuit's operating status, facilitating timely detection of circuit abnormalities. The relay contacts enable remote control system start, stop, and alarm functions. When the host 1 sends a start / stop command or detects an abnormality, the relay contacts activate to perform the corresponding operation.

[0028] Please see Figure 2 - Figure 4 As shown, the host 1 supports viewing and exporting temperature curves. Users can view the temperature change curve of the infrared heating device 3 in real time through the control screen 11, and can also export curve data through the USB interface 14 for subsequent process analysis and record retention. Its operating system includes a system settings page, a curve temperature document import page, a heating mode switching function, a curve preview function, an AT self-tuning function, and a PID parameter reading and control function. The system settings page allows users to customize the target temperature, heating time, holding time, and output power for each mode. The curve temperature document import page supports importing preset temperature curve documents in CSV format from an XLS worksheet, eliminating the need to manually set curve parameters segment by segment and improving operational efficiency.

[0029] The heating modes include open-loop power mode, curve temperature mode, constant temperature mode, and unlimited open-loop power mode, which can cover the heating needs of different scenarios. The open-loop power mode allows you to set the lamp-on time, lamp-off time, and number of cycles, and operates according to the preset power, heating time, cooling time, and number of cycles without being affected by temperature feedback. It is suitable for scenarios where the temperature accuracy requirement is not high and fixed-cycle heating is required. The curve temperature mode allows you to manually set or import multiple temperature curves. Each temperature curve includes the target temperature, heating time, and holding time, which meets the complex process requirements of multi-stage temperature changes (such as material gradient heating). The constant temperature mode can maintain a constant preset temperature, and the target temperature can be directly adjusted on the main page of the host unit. It is easy to operate and is suitable for experimental or production processes that require a stable temperature environment. The unlimited open-loop power mode allows you to set a fixed output power or modify the output power in real time. The equipment runs continuously until it stops automatically. It is suitable for scenarios such as industrial drying and material pretreatment that do not require precise temperature control but require long-term heating.

[0030] The temperature controller 26 can display PV (measured temperature, i.e., the current actual temperature of the infrared heating device 3) and SV (target temperature, i.e., the set heating target temperature), and the SV value can be changed by pressing the confirmation button (or waiting 3 seconds for automatic confirmation), meeting the needs of quickly adjusting the target temperature on site. The temperature controller 26 is equipped with status indicator lights, including the MANU light (lit when the percentage power output is in automatic mode), the RUN / HOLD / END light (lit when the ramp-heat preservation mode is enabled), and the AT light (lit when the self-tuning timer is enabled), allowing users to intuitively judge the current operating status of the equipment through the indicator lights. The temperature controller 26 also supports manual mode setting, automatic tuning, ramp-heat preservation setting and execution, alarm parameter setting, and sensor type setting, enabling basic on-site control and parameter calibration, and improving the applicability of the equipment.

[0031] Temperature controller settings:

[0032] In automatic mode, the temperature controller display is set to PV / SV dual display. PV represents the actual temperature (measured value) of the infrared heating device 3, and SV represents the target temperature (set value), visually presenting the temperature deviation. The SV value can be modified via the operation buttons, and the confirmation button is pressed to take effect; if not manually confirmed, it will automatically confirm after 3 seconds. MANU light: Illuminates when outputting a percentage of power in automatic mode, indicating the current automatic operation status. RUN / HOLD / END light: Illuminates when the ramp-heat preservation mode is activated, indicating the feedback mode is in execution or paused state. AT light: Illuminates when the automatic tuning function is activated, and turns off when the function is turned off or completed.

[0033] To set the manual mode (percentage power output), in automatic mode, briefly press the mode selection button to enter the operating mode selection interface. Select "MAN Mode" and confirm to enter the manual setting interface. Select "OFF / ON" to confirm, turning the power output off / on (the MANU light will illuminate when on); adjust the MV value using the parameter keys to modify the corresponding power output percentage.

[0034] To set the automatic tuning function, press the mode selection button in automatic mode to enter the operating mode selection interface. Select "AT Mode" and confirm to enter the tuning setting interface. Select "OFF / ON" to confirm and turn tuning off / on (the AT light will illuminate when on).

[0035] Setting and executing the ramp-heat preservation mode: (I) Parameter setting (taking "Mode 0" for executing 1-8 stages of heating as an example): In automatic mode, press and hold the channel selection key for 2 seconds, select "Channel CH3" to confirm, and enter the parameter setting interface. Set the following parameters in sequence: ① Mode parameter (PNT): Select "Mode 0" and execute SV1-SV8 program; ② Time parameter (TCMU): Select time unit (MM.SS / HH,MM); ③ Target value (SV-1): Set the first stage target temperature; ④ Ramp time (TMIR): Set the first stage heating duration; ⑤ Heat preservation time (TMIS): Set the first stage heat preservation duration; ⑥ Repeat ③-⑤ to complete the SV2-SV8 parameter setting. (II) Mode execution: In automatic mode, press the mode selection key and select "PROG mode" to confirm. Select "RUN" to confirm start (RUN / HOLD / END light will illuminate); to pause, select "HLD", and to resume, select "RUN" again.

[0036] Alarm parameter settings: In automatic mode, press the mode selection key to enter the operation mode selection interface. Select "A1-L (Start Limit)" to confirm; this sets the probe's maximum capability value when a lower limit alarm is not required. Select "A1-H (Over-Temperature Power Off)" to confirm; the default is a PV alarm exceeding SV by 10℃, which can be adjusted as needed. Select "AL2" and set it to 10 to form dual over-temperature protection; an alarm will be triggered and the heating circuit power will be cut off when the temperature exceeds the limit.

[0037] Sensor type setting (taking the IR-OP10LTV non-contact infrared probe as an example): In automatic mode, press and hold the channel selection button for 2 seconds, select "CH6 channel" to confirm, and enter the sensor settings interface. Set the following in sequence: ① Sensor input type (PVT) select "0-5V" (K-type sensors select K1-K4); ② Input lower limit (PVb) set to -50; ③ Input upper limit (PVF) set to 1030; ④ Pixel bits (PVd) set to 0 (no decimal point, 1-3 correspond to 1 to 3 decimal places).

[0038] The control circuit of this infrared heating control device includes a power supply circuit, a control circuit, an alarm circuit, and a heating circuit. The circuit structure, component functions, and working principle of the control method are described in detail below (please refer to the appendix). Figure 5 (As shown), ensure safe circuit connection and operation.

[0039] An external single-phase 220V AC power supply is connected to the main power switch 23 of control box 2. After the main power switch 23, the power is split into two paths: one directly powers the heating circuit, and the other connects to the input of the switching power supply. The switching power supply outputs 24V 2.5A DC power to power relays (K1, K2, K3, K4), the temperature controller, and the start / stop button indicator lights, ensuring stable operation of the control components. The start and stop signals of the remote control system are connected to the contacts of relay K3 via wires. When a start signal is sent remotely, the contacts of K3 close, the control circuit is activated, and the equipment starts; when a stop signal is sent, the contacts of K3 open, and the equipment stops. The AL1 (first alarm) and AL2 (second alarm) signal outputs of the temperature controller are connected to the coils of relays K1 and K2, respectively. When the temperature controller detects an abnormal temperature (such as over-temperature), the AL1 or AL2 signal is triggered, energizing the coils of K1 or K2, and their contacts actuate. The start and stop buttons 25 are connected in series in the control circuit. Pressing the start button activates the control circuit, energizes the coil of contactor KM1, closes the main contacts of KM1, and energizes the heating circuit. Pressing the stop button 25 disconnects the control circuit, de-energizes the coil of KM1, and de-energizes the heating circuit, enabling manual control on-site. The normally open contact of relay K1 is connected in series with buzzer 22. When the temperature controller triggers the AL1 alarm, the coil of K1 is energized, its normally open contact closes, and buzzer 22 is energized to sound an alarm. Similarly, when the AL2 alarm is triggered, the contact of K2 actuates, and buzzer 22 sounds an alarm simultaneously, ensuring that abnormal situations are detected promptly. In the heating circuit, the main contacts of contactor KM1, the power controller (UL4F-1, LONGPRO), and the infrared heating device 3 are connected in series; the power controller receives the control signal from the temperature controller. Adjust the output power to control the heating temperature of the infrared heating device 3; Heating circuit 1 and heating circuit 2 are connected in series with a current transformer, and the signal output terminal of the current transformer is connected to the upper system. The upper system detects the current change of the heating circuit through the current transformer and monitors the load working status in real time (such as whether it is overloaded or open circuit). If a load detection device is selected, the accuracy of circuit status monitoring can be further improved.

[0040] Taking remote device startup and entry into constant temperature mode as an example, the circuit workflow is as follows:

[0041] Close the main power switch 23 of control box 2. The switching power supply is powered on and outputs 24V DC power. The control circuit components are powered on and ready to operate, and the start / stop button indicator light is off. The remote control system sends a start signal, energizing the coil of relay K3, closing its normally open contact, and connecting the control circuit. If the local start button is pressed at this time, the coil of contactor KM1 is energized, the main contact of KM1 closes, the heating circuit is powered on, and the infrared heating device begins preheating. The temperature controller monitors the PV (actual temperature) in real time and compares it with the SV (target temperature), sending a control signal to the power controller. The power controller adjusts the output power according to the signal, gradually bringing the temperature of the infrared heating device closer to the SV value. During this process, if the equipment outputs power at a percentage, the MANU light illuminates. When the temperature reaches the SV value and enters a constant temperature state, the temperature controller controls the power controller through a PID adjustment algorithm to maintain temperature stability. If the automatic tuning function needs to be activated, the AT light illuminates, and the temperature controller automatically optimizes the PID parameters to further improve the constant temperature accuracy. If PV exceeds SV10℃ during heating, the temperature controller triggers alarm AL1 or AL2, energizing the coil of relay K1 or K2, closing its contacts, and triggering buzzer 22. Simultaneously, the normally closed contact of K1 or K2 opens, de-energizing the control circuit. The main contact of KM1 opens, de-energizing the heating circuit to prevent further temperature increases and ensure equipment safety. A stop signal can be sent remotely, or the stop button 25 can be pressed on-site to disconnect the control circuit, de-energize the KM1 coil, de-energize the heating circuit, and stop the equipment. Turning off the main power switch 23 de-energizes the entire circuit, ending the operation.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An infrared heating control device, comprising a main unit (1) and at least one control box (2), characterized in that: The host (1) and the control box (2) communicate with each other via a 485 communication line to achieve data interaction and control signal transmission; the host (1) is a hardware device adapted to the Windows system and is equipped with an operating screen (11), a power interface (12), a communication interface (13) and a USB interface (14). The control box (2) is equipped with a heavy-duty aviation connector (21), a buzzer (22), a main power switch (23), a start button (24), a stop button (25), and a temperature control meter (26). The heavy-duty aviation connector (21) is used to detachably connect to an external infrared heating device (3). The host (1) can set and monitor the operating parameters of the control box (2) to realize remote control of the heating process of the infrared heating device (3).

2. The infrared heating control device according to claim 1, characterized in that: The control box (2) is equipped with a switching power supply, a power controller, a heating circuit transformer and a relay; the switching power supply has a single-phase 220V input and an output of 24V 2.5A; the power controller is connected to the temperature control meter (26); the heating circuit transformer is used to detect the heating circuit status; the contacts of the relay can realize the remote control system start, stop and alarm functions.

3. The infrared heating control device according to claim 1, characterized in that: The temperature controller (26) can display PV and SV, and the SV value can be changed by pressing a button; the temperature controller (26) is equipped with a status indicator light; the temperature controller (26) also supports manual mode setting, automatic tuning, ramp-heat preservation setting and execution, alarm parameter setting and sensor type setting.

4. The infrared heating control device according to claim 1, characterized in that: The 485 communication line uses a twisted-pair shielded cable and meets specific communication specifications.

Images