A fin heater

Abstract

The application belongs to the field of wastewater recycling, and discloses a fin heater, which comprises a frame formed by assembling multiple aluminum profiles, a mounting plate and an industrial programmable RTU control unit. In use, the RTU control unit is provided with a hierarchical temperature control logic, and Tmin and Tmax threshold values are preset. In winter, the heater rod is powered on after the fan is pre-started for ten seconds, and heat is uniformly diffused in the longitudinal convection channel. In summer, only the fan is started to dissipate heat, and no additional equipment is needed. The fin heater is suitable for complex working conditions such as day and night temperature difference and seasonal change, and can switch between heating and fan cooling to meet the temperature control requirements in different seasons and working conditions.

Description

Technical Field

[0001] This invention relates to the field of heating control technology, and more particularly to a finned heater. Background Technology

[0002] In the operation of industrial equipment, ambient temperature has a significant impact on the reliability of the system. Especially in cold regions, refrigeration units, frequency standard equipment, or measurement and control electronic modules often become unstable due to excessively low ambient temperatures.

[0003] Currently, commonly used temperature control devices in industrial settings include resistance wire heaters and electric heaters. Electric heaters are widely used in scenarios requiring rapid heating due to their large heat dissipation area and high heating efficiency. However, electric heaters are installed with fixed metal frames, which leads to problems such as fixed structure, non-expandable power, and inconvenient maintenance. In summer or high-temperature environments, the same device needs forced heat dissipation to prevent components from overheating, thus requiring bidirectional thermal management functions. However, existing solutions are generally closed in structure and cannot take into account both heating and heat dissipation modes. In addition, traditional AC contactor control methods are noisy, have short lifespans, and lack intelligent adjustment functions.

[0004] In conclusion, there is an urgent need for a heater that can achieve both heating and heat dissipation, in order to enable automatic control of ambient temperature and long-term stable operation. Summary of the Invention

[0005] The finned heater provided by this invention can achieve bidirectional adjustment of heating and heat dissipation according to the ambient temperature, and has the advantages of modular structure, high stability and easy maintenance.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a finned heater, comprising: a frame formed by assembling multiple aluminum profiles, a mounting plate, and an industrial-grade programmable RTU control unit; the heater further comprises:

[0007] The four corners of the frame are connected by corner brackets. The mounting plate is a thick aluminum plate processed by laser and has a regular array of holes. Multiple heating rods are installed in the array of holes by nuts. The heating rods are controlled to be switched on and off by a solid-state relay module. An industrial silent axial flow fan is installed at one end of the frame. The industrial silent axial flow fan has low noise when running.

[0008] The RTU control unit is electrically connected to a temperature sensor, and an aluminum heat sink is mounted on one side of the frame by screws.

[0009] The power input terminal is located on one side of the aluminum heat sink;

[0010] Multiple polycarbonate protective panels are fixedly installed on the top and front and rear sides of the frame, respectively.

[0011] As a further improvement of the present invention: the temperature sensor is fixedly installed on the side of the aluminum heat sink near the heating rod, and is used to collect the ambient temperature signal and feed it back to the RTU control unit.

[0012] As a further improvement of the present invention: the power input terminal is electrically connected to the solid-state relay module, the industrial silent axial flow fan and the RTU control unit respectively through wires, so as to provide AC220V / 380V dual voltage power supply to each electrical component.

[0013] As a further improvement of the present invention: T-slots are provided on the inner walls of multiple aluminum profiles of the frame, and nut sliders are engaged in the T-slots of the multiple aluminum profiles of the frame, which are locked to the edge of the mounting plate by bolts.

[0014] As a further improvement of the present invention: the frame is made of industrial profiles, and the corner brackets used for connecting the four corners of the frame are fastened by hexagonal head screws.

[0015] As a further improvement of the present invention: the heating rod adopts a 304 stainless steel finned metal shell, with heat dissipation fins integrally formed on the outer side of the shell, and a nickel-chromium alloy heating wire and a high-alumina ceramic insulation layer encapsulated inside. A high-temperature resistant polytetrafluoroethylene bushing is fitted at the gap between the heating rod and the mounting plate hole array to avoid direct contact between the metal shell and the mounting plate, thereby improving thermal efficiency and preventing corrosion.

[0016] As a further improvement of the present invention: the polycarbonate protective plate is made of semi-transparent impact-resistant PC material, which facilitates observation of the internal operating status, and sealing strips are pasted at the joints of the polycarbonate protective plate.

[0017] As a further improvement of the present invention: the air outlet of the industrial silent axial flow fan faces the direction of the heating rod arrangement and forms a longitudinal convection channel inside the frame to realize air circulation. The directional air outlet allows the airflow driven by the fan to flow precisely through the heating rod fins, quickly delivering the heated air to the temperature control area and carrying away the high-temperature air from the heating rod and the surrounding area. Under these conditions, the longitudinal convection channel ensures a stable airflow path without dead corners, avoiding local temperatures that are too high or too low, achieving temperature uniformity in the temperature control area, and improving the overall temperature control effect.

[0018] As a further improvement of the present invention: the graded temperature control program of the RTU control unit presets two temperature thresholds Tmin and Tmax. When the ambient temperature is lower than Tmin, the heating rod and the industrial silent axial flow fan are started simultaneously. When the temperature is higher than Tmax, only the industrial silent axial flow fan is started. When the temperature is between Tmin and Tmax, both are in standby mode. The temperature threshold is set through the RTU local operation interface. During operation, the RTU control unit will collect the temperature signal near the aluminum heat sink in real time through the temperature sensor. When the temperature is lower than Tmin, the equipment first starts the industrial silent axial flow fan. Ten seconds later, the heating rod is powered on and heated through the solid-state relay module. The heat generated by the nickel-chromium alloy heating wire of the heating rod is diffused through the finned shell. The fan drives the air to flow in from the air inlet at the other end of the frame. After being heated, the hot airflow evenly covers the temperature control area.

[0019] As a further improvement of the present invention: the RTU control unit includes a communication interface module, which integrates RS485, RS232 and RJ45 communication ports and communicates with the host computer to realize temperature monitoring and operation status feedback.

[0020] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0021] 1. This invention uses the graded temperature control logic of the RTU control unit to preset the Tmin and Tmax thresholds. In winter when the temperature is low, the heating rod is powered on 10 seconds after the fan is pre-started, and heat is evenly diffused through the interior of the longitudinal convection channel. In summer when the temperature is high, only the fan is started to dissipate heat, without the need for additional equipment. It is adaptable to complex working conditions such as day-night temperature difference and seasonal changes, realizes the switching between heating and fan heat dissipation, and meets the temperature control requirements under different seasons and working conditions.

[0022] 2. The modular design of this invention facilitates disassembly and maintenance, and the mounting plate hole array allows for quick replacement of the heating rod.

[0023] 3. In this invention, the frame is assembled with aluminum profiles, and both the mounting plate and the protective plate are detachable, making it suitable for system expansion with different power or size. Attached Figure Description

[0024] Figure 1 This invention provides a schematic diagram of the overall three-dimensional structure of a finned heater.

[0025] Figure 2 This invention provides a side-view three-dimensional structural diagram of a finned heater.

[0026] Figure 3 This invention provides a schematic diagram of the electrical connection of the control system in a finned heater.

[0027] Figure 4The present invention provides a logic flowchart for the RTU control unit in a finned heater.

[0028] Legend: 1. Frame; 2. Mounting plate; 3. Heating rod; 4. Solid state relay module; 5. Industrial silent axial flow fan; 6. Temperature sensor; 7. RTU control unit; 8. Power input terminal; 9. Polycarbonate protective plate; 10. Nut slider; 11. Aluminum heat sink; 12. Corner bracket. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] like Figures 1 to 4 As shown, the present invention provides a finned heater, which includes: a frame 1 formed by assembling multiple aluminum profiles, a mounting plate 2, and an industrial-grade programmable RTU control unit 7. The heater also includes: the four corners of the frame 1 are connected by corner brackets 12; the mounting plate 2 is a thick aluminum plate processed by laser and has a regular array of holes; multiple heating rods 3 are installed in the array of holes by nuts; the heating rods 3 are controlled to switch on and off by a solid-state relay module 4; an industrial silent axial flow fan 5 is installed at one end of the frame 1; the RTU control unit 7 is electrically connected to a temperature sensor 6; an aluminum heat sink 11 is installed on one side of the frame 1 by screws; a power input terminal 8 is located on one side of the aluminum heat sink 11; and multiple polycarbonate protective plates 9 are respectively fixedly installed on the top and front and rear sides of the frame 1.

[0031] When in use, the modular combination of core components ensures the stability of the overall structure of the equipment, while also integrating heating, temperature control and protection functions. It is suitable for temperature control needs in various scenarios such as outdoor semi-enclosed and semi-open environments, and the detachable design of the components provides convenience for subsequent maintenance.

[0032] Please see Figure 1 and Figure 3 In one embodiment, the temperature sensor 6 is fixedly mounted on the side of the aluminum heat sink 11 near the heating rod 3. It is used to collect ambient temperature signals and feed them back to the RTU control unit 7. By placing the temperature sensor 6 close to the area where the heating rod 3 and the aluminum heat sink 11 are located, the heat dissipation status of the heating rod 3 and the surrounding air temperature can be collected simultaneously. This avoids the lag of collecting only air temperature data, ensuring a more accurate temperature signal and providing a reliable basis for the logical judgment of the RTU control unit 7. This reduces temperature control errors caused by temperature acquisition deviations. Figure 3The electrical connection diagram shows the connection relationship between temperature sensor 6, RTU control unit 7, and aluminum heat sink 11, as well as the electrical signal transmission path between RTU control unit 7, solid-state relay module 4, and industrial silent axial flow fan 5.

[0033] Please see Figures 1 to 4 In one embodiment, the power input terminal 8 is electrically connected to the solid-state relay module 4, the industrial silent axial flow fan 5, and the RTU control unit 7 via wires, providing AC220V / 380V dual-voltage power to each electrical component. The external AC220V / 380V power supply is connected through the power input terminal 8 next to the aluminum heat sink 11 on one side of the frame 1. After passing through the overload protection circuit breaker built into the terminal, it provides high voltage to the solid-state relay module 4 via wires to control the on / off of the heating rod 3, provides AC220V working power to the industrial silent axial flow fan 5 to ensure the fan's start-up, shutdown, and speed stability, and provides low voltage power to the RTU control unit 7 to support the operation of the control module and communication module.

[0034] Please see Figures 1 to 4 In one embodiment, T-slots are provided on the inner walls of multiple aluminum profiles of the frame 1. Nut sliders 10 are snapped into the T-slots of the multiple aluminum profiles of the frame 1 and locked to the edge of the mounting plate 2 by bolts. The cooperation between the T-slots and the nut sliders 10 enables the mounting plate 2 to be detached and its position adjustable. By loosening the bolts, the mounting plate 2 can be slid along the T-slots to adjust the lateral and longitudinal positions of the heating rod 3 to adapt to the heating requirements of different temperature control areas. At the same time, the snap-fit ​​fixing does not require additional welding or drilling. When disassembling, only the bolts and nut sliders 10 need to be separated, which reduces the difficulty of replacing the mounting plate 2 and the heating rod 3 and improves maintenance efficiency.

[0035] Please see Figures 1 to 4 In one embodiment, the frame 1 is made of industrial profiles, and the corner brackets for connecting the four corners of the frame 1 are fastened by hexagonal head screws. The industrial profiles of the frame 1 have high strength and corrosion resistance, can support the weight of each structure and withstand the wind and rain of the outdoor environment, and extend the service life of the equipment.

[0036] Please see Figures 1 to 4In one embodiment, the heating rod 3 adopts a 304 stainless steel finned metal shell with integrally formed heat dissipation fins on the outer side. The inner shell is encapsulated with a nickel-chromium alloy heating wire and a high-alumina ceramic insulation layer. A high-temperature resistant polytetrafluoroethylene bushing is fitted at the gap between the heating rod 3 and the hole array of the mounting plate 2 to avoid direct contact between the metal shell and the mounting plate 2, thereby improving thermal efficiency and preventing corrosion. The 304 stainless steel shell and fins not only enhance the corrosion resistance of the heating rod 3, but also increase the contact area with air through the fins, accelerating heat diffusion. The nickel-chromium alloy heating wire has high heating efficiency and long service life, and the high-alumina ceramic insulation layer can withstand high temperatures. The polytetrafluoroethylene bushing isolates the metal shell from direct contact with the mounting plate 2, thereby reducing heat conduction loss to the mounting plate 2, improving thermal efficiency, and preventing electrochemical corrosion due to material differences between the two, thus extending the service life of the heating rod 3 and the mounting plate 2.

[0037] Please see Figures 1 to 4 In one embodiment, the polycarbonate protective plate 9 is made of semi-transparent, impact-resistant PC material, which facilitates observation of the internal operating status, and sealing strips are affixed to the joints of the polycarbonate protective plate 9.

[0038] Please see Figures 1 to 4 In one embodiment, the air outlet of the industrial silent axial flow fan 5 faces the arrangement direction of the heating rods 3 and forms a longitudinal convection channel inside the frame 1 to achieve air circulation.

[0039] Please see Figures 1 to 4In one embodiment, the graded temperature control program of the RTU control unit 7 presets two temperature thresholds, Tmin and Tmax. When the ambient temperature is lower than Tmin, the heating rod 3 and the industrial silent axial flow fan 5 are started simultaneously. When the temperature is higher than Tmax, only the industrial silent axial flow fan 5 is started. When the temperature is between Tmin and Tmax, both are in standby mode. The RTU control unit includes a communication interface module, which integrates RS485, RS232, and RJ45 communication ports and communicates with the host computer to realize temperature monitoring and operation status feedback. The temperature thresholds Tmin are typically set to 1℃-10℃ and Tmax to 25℃-40℃ through the RTU local operation interface. In winter, when the temperature is low, Tmin is set to 5℃, and in summer, when the temperature is high, Tmin is set to 25℃-40℃. After setting ax to 30℃, the device automatically enters the operating state. During operation, the RTU control unit 7 collects the temperature signal near the aluminum heat sink 11 in real time through the temperature sensor 6. When the temperature is lower than Tmin, the device first starts the industrial silent axial flow fan 5. Ten seconds later, the solid-state relay module 4 controls the heating rod 3 to be powered on and heated. The heat generated by the nickel-chromium alloy heating wire of the heating rod 3 is diffused through the finned shell. The fan drives air to flow in from the air inlet at the other end of the frame 1. After heating, a hot airflow is formed to evenly cover the temperature control area. When the temperature is higher than Tmax, the heating rod 3 automatically cuts off the power, and the fan continues to run to dissipate heat until the temperature drops to Tmax-5℃ and then stops. When the temperature is between Tmin and Tmax, the device maintains low-power standby, with only temperature acquisition continuing. Figure 4 The logic flowchart can intuitively show the process of the RTU control unit 7 based on the signals collected by the temperature sensor 6.

[0040] The working principle and usage process of this invention are as follows: When using the heater, first close the overload protection circuit breaker at the power input terminal 8. At this time, the RTU control unit 7 automatically enters the self-test mode. After the self-test is passed, the standby indicator light will illuminate. According to the actual working conditions, set the temperature threshold through the RTU local operation interface. After the setting is completed, the equipment will automatically enter the running state. During the operation, the RTU control unit 7 will collect the temperature signal near the aluminum heat sink 11 in real time through the temperature sensor 6. When the temperature is lower than Tmin, the equipment first starts the industrial silent axial flow fan 5. Ten seconds later, the solid-state relay module 4 controls the heating rod 3 to be powered on and heated. The heat generated by the nickel-chromium alloy heating wire of the heating rod 3 is diffused through the finned shell. The fan drives the air to flow in from the air inlet at the other end of the frame 1. After heating, a hot airflow is formed to evenly cover the temperature control area. When the temperature is higher than Tmax, the heating rod 3 is automatically powered off, and the fan continues to run to dissipate heat until the temperature drops to Tmax-5℃ and then stops. When the temperature is between Tmin and Tmax, the equipment maintains low power standby, and only temperature acquisition continues to work.

[0041] When the equipment is shut down, first manually press the shutdown button on the RTU control unit 7. After the heating rod 3 is completely de-energized and the fan continues to run until the temperature drops to room temperature, disconnect the overload protection circuit breaker on the power input terminal 8. If the equipment is not used for a long time, the power wiring should be disconnected, the dust inside the frame 1 and on the surface of the protective plate should be cleaned, and the protective plate should be re-fixed tightly to prevent debris from entering the equipment.

[0042] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0043] 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.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A finned heater, the heater comprising: The heater comprises a frame (1) assembled from multiple aluminum profiles, a mounting plate (2), and an industrial-grade programmable RTU control unit (7), characterized in that the heater further includes: The four corners of the frame (1) are connected by corner brackets (12). The mounting plate (2) is a thick aluminum plate processed by laser, and it has a regular hole array. Multiple heating rods (3) are installed in the hole array by nuts. The heating rods (3) are controlled to switch on and off by a solid-state relay module (4). An industrial silent axial flow fan (5) is installed at one end of the frame (1). The RTU control unit (7) is electrically connected to a temperature sensor (6), and an aluminum heat sink (11) is mounted on one side of the frame (1) by screws. A power input terminal (8) is located on one side of the aluminum heat sink (11); Multiple polycarbonate protective panels (9) are fixedly installed on the top and front and rear sides of the frame (1).

2. The finned heater according to claim 1, characterized in that: The temperature sensor (6) is fixedly installed on the side of the aluminum heat sink (11) near the heating rod (3) to collect the ambient temperature signal and feed it back to the RTU control unit (7).

3. The finned heater according to claim 1, characterized in that: The power input terminal (8) is electrically connected to the solid-state relay module (4), the industrial silent axial flow fan (5), and the RTU control unit (7) respectively through wires, providing AC220V / 380V dual voltage power supply to each electrical component.

4. The finned heater according to claim 1, characterized in that: T-slots are provided on the inner walls of multiple aluminum profiles of the frame (1), and nut sliders (10) are snapped into the T-slots of multiple aluminum profiles of the frame (1) and locked to the edge of the mounting plate (2) by bolts.

5. The finned heater according to claim 1, characterized in that: The frame (1) is made of industrial profiles, and the corner brackets for connecting the four corners of the frame (1) are fastened by internal hexagonal head screws.

6. The finned heater according to claim 1, characterized in that: The heating rod (3) is made of 304 stainless steel finned metal shell. The outer side of the shell is integrally formed heat dissipation fins, and the inner part is encapsulated with nickel-chromium alloy heating wire and high-alumina ceramic insulation layer. A high-temperature resistant polytetrafluoroethylene bushing is sleeved at the gap between the heating rod (3) and the hole array of the mounting plate (2) to avoid direct contact between the metal shell and the mounting plate (2), thereby improving thermal efficiency and preventing corrosion.

7. The finned heater according to claim 1, characterized in that: The polycarbonate protective plate (9) is made of semi-transparent impact-resistant PC material, which makes it easy to observe the internal operating status. Sealing strips are pasted at the joints of the polycarbonate protective plate (9).

8. The finned heater according to claim 1, characterized in that: The air outlet of the industrial silent axial flow fan (5) faces the arrangement direction of the heating rod (3) and forms a longitudinal convection channel inside the frame (1) to realize air circulation.

9. The finned heater according to claim 1, characterized in that: The graded temperature control program of the RTU control unit (7) presets two temperature thresholds, Tmin and Tmax. When the ambient temperature is lower than Tmin, the heating rod (3) and the industrial silent axial flow fan (5) are started simultaneously. When the temperature is higher than Tmax, only the industrial silent axial flow fan (5) is started. When the temperature is between Tmin and Tmax, both are in standby mode.

10. The finned heater according to claim 9, characterized in that: The RTU control unit (7) includes a communication interface module, which integrates RS485, RS232 and RJ45 communication ports and communicates with the host computer to realize temperature monitoring and operation status feedback.

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