Electromagnetic heating device and heating method

Abstract

The invention relates to an electromagnetic heating device and a heating method. The device comprises a high-frequency generator, a high-frequency conduction copper pipe, a magnetic control heating assembly, a heat dissipation assembly, a thermocouple patch and a programmable temperature controller, the high-frequency generator is used for generating high-frequency electromagnetic waves, and the high-frequency conduction copper pipe is used for transmitting the high-frequency electromagnetic waves to the magnetic control heating assembly; the heat dissipation assembly and the magnetic control heating assembly are arranged in a non-contact mode and used for dispersing heat generated by the magnetic control heating assembly, one end of the thermocouple patch makes contact with the magnetic control heating assembly, the other end of the thermocouple patch is electrically connected with the programmable temperature controller, and the programmable temperature controller regulates and controls the high-frequency electromagnetic wave generation state of the high-frequency generator based on the current temperature of the magnetic control heating assembly. According to the scheme, the magnetic control heating assembly does not make direct contact with the to-be-heated equipment, the heat of the magnetic control heating assembly is dissipated into the air based on the heat dissipation assembly to achieve electromagnetic air heating, the extremely hot condition of a conduction device cannot occur, and after heating of the magnetic control heating assembly is stopped, the high-temperature potential safety hazard is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental heating, and in particular to an electromagnetic heating device and a heating method. Background Art

[0002] With the acceleration of industrialization and the enhancement of safety awareness in production, the market demand for explosion-proof heating equipment has gradually increased, which has promoted the innovation and development of related technologies. In industrial production, especially in flammable and explosive environments, how to ensure the safe heating of the equipment to be heated is crucial. In the prior art, infrared heating (lamps, fire, etc.), electric furnace wires, etc. are mostly used to heat the equipment to be heated. However, since infrared heating (lamps, fire, etc.), electric furnace wires and the equipment to be heated require extremely hot conduction devices for heat transfer, after the heating is stopped, the extremely hot conduction device will still have a high temperature, which will bring certain safety hazards. Therefore, providing a heating device that is separated from the extremely hot conduction device is a technical problem that needs to be solved urgently. Summary of the invention

[0003] The purpose of the present invention is to propose a technical solution to the problem in the prior art that after the heating is stopped, the extreme heat conduction device will still have a relatively high temperature, which brings certain safety hazards.

[0004] According to one aspect of the present application, an electromagnetic heating device is disclosed, the device comprising a high-frequency generator, a high-frequency conductive copper tube, a magnetically controlled heating component, a heat dissipation component, a thermocouple patch and a programmable temperature controller, the high-frequency generator is used to generate high-frequency electromagnetic waves, the high-frequency conductive copper tube comprises a connecting portion and a surrounding portion, the high-frequency conductive tube is connected to the high-frequency generator through the connecting portion, the surrounding portion of the high-frequency conductive tube is arranged around the magnetically controlled heating component to transmit the high-frequency electromagnetic waves to the magnetically controlled heating component, and the magnetically controlled heating component generates heat under the action of the high-frequency electromagnetic waves; the heat dissipation component is arranged in a non-contact manner with the magnetically controlled heating component, the heat dissipation component is used to disperse the heat generated by the magnetically controlled heating component, one end of the thermocouple patch is in contact with the magnetically controlled heating component, the other end of the thermocouple patch is electrically connected to the programmable temperature controller, the programmable temperature controller is connected to the high-frequency generator signal, so as to adjust the high-frequency electromagnetic wave generation state of the high-frequency generator based on the current temperature of the magnetically controlled heating component fed back by the thermocouple patch.

[0005] In some embodiments, the magnetically controlled heating component includes a magnetically controlled heating shell and a plurality of magnetically controlled heating fins, and the plurality of magnetically controlled heating fins are arranged in the magnetically controlled heating shell at intervals along the length direction of the magnetically controlled heating shell.

[0006] In some embodiments, the thickness of the magnetically controlled heating fin is 0.3 mm to 0.8 mm, the width is 15 mm to 25 mm, the length is 25 mm to 35 mm, and the gap between two adjacent magnetically controlled heating fins is 0.5 mm to 1 mm.

[0007] In some embodiments, the surrounding portion of the high-frequency conductive copper tube is a quadrilateral ring structure formed by bending the high-frequency conductive copper tube a target number of times.

[0008] In some embodiments, the thermocouple patch is attached to the magnetron heating fin, and thermal conductive paste is applied between the thermocouple patch and the magnetron heating fin.

[0009] In some embodiments, the high-frequency generator includes a solid-state relay, one end of the programmable temperature controller is electrically connected to the thermocouple patch, the other end of the programmable temperature controller is connected to the solid-state relay, the high-voltage terminals of the solid-state relay are connected to the high-frequency conductive copper tube at both ends, and a capacitance component is connected in series between the high-frequency conductive copper tube and the solid-state relay, and the capacitance component includes a thin-film high-frequency capacitor and a 1KΩ high-voltage resistor connected in parallel.

[0010] In some embodiments, the magnetically controlled heating fins are any one of aluminum sheets, copper sheets, nickel sheets, iron sheets, and stainless steel sheets.

[0011] In some embodiments, the magnetron heating housing and the magnetron heating fins are brazed together.

[0012] According to another aspect of the present application, an electromagnetic heating method is disclosed. The method is implemented based on any one of the electromagnetic heating devices described above, and the method comprises:

[0013] S1, starting the high frequency generator and adjusting the high frequency generator to the target heating temperature of the magnetic control heating component;

[0014] S2, starting the programmable thermostat and setting the programmable thermostat to a fixed value temperature control mode;

[0015] S3, obtaining a temperature change curve of the magnetic control heating component during heating, wherein the temperature change curve is used to characterize the change of the temperature of the magnetic control heating component over time at a target time;

[0016] S4, determining the minimum temperature rise rate of the magnetically controlled heating component based on the temperature change curve;

[0017] S5. Determine a programmable temperature control mode of the programmable temperature controller based on the temperature rise rate;

[0018] S6. Restarting the high frequency generator and the programmable temperature controller so that the programmable temperature controller controls the heating of the magnetically controlled heating component based on the programmable temperature control mode.

[0019] In some embodiments, the method further comprises:

[0020] Determining whether the magnetic control heating component has an overshoot phenomenon during the heating process based on the temperature change curve;

[0021] If the magnetically controlled heating component has an overshoot phenomenon during the heating process, repeat steps S1-S5 to continue debugging the temperature control mode of the programmable temperature controller.

[0022] The beneficial effects that may be brought about by the embodiments of this specification include but are not limited to: (1) The magnetically controlled heating component of this solution does not directly contact the device to be heated, but instead uses the heat dissipation component to dissipate the heat of the magnetically controlled heating component into the air to achieve electromagnetic air-insulated heating, so that the conduction device will not be extremely hot. After the heating of the magnetically controlled heating component is stopped, the high-temperature safety hazard is reduced; (2) The combination of the programmable temperature controller and the thermocouple patch of this solution can monitor and feedback the temperature of the magnetically controlled heating component in real time to ensure accurate control of the heating process and avoid overheating or insufficient heating; (3) The design of the heat dissipation component enables the heat generated by the magnetically controlled heating component to be effectively dispersed to achieve heating of the surrounding environment, and to achieve heating of the device to be heated based on the thermal environment, thereby avoiding direct contact between the device to be heated and the magnetically controlled heating component, thereby avoiding extreme heat when heating is stopped and reducing the risk of high-temperature explosion; (4) The structural design of the device enables each component (high-frequency generator, high-frequency conduction tube, magnetically controlled heating component, etc.) to work independently, which is convenient for maintenance and replacement and reduces downtime; (5) This solution can be used according to different application needs. (6) The temperature controller connected by the signal can adjust the output state of the high-frequency generator in real time to ensure the stability and reliability of the heating process; (7) The multiple magnetically controlled heating fins in the magnetically controlled heating component fill the magnetically controlled heating shell so that the heat can be evenly distributed in the entire shell, thereby improving the heating effect and avoiding local overheating; (8) The quadrilateral ring structure design of the high-frequency conduction copper tube makes it more flexible in space utilization and heat transfer, and adapts to different installation environments and requirements; (9) The thermocouple patch is directly attached to the magnetically controlled heating fin, which can more accurately monitor the actual temperature of the fin and improve the response speed and accuracy of the temperature control system. The thermal conductive paste is applied between the thermocouple patch and the magnetically controlled heating fin, which further improves the heat conduction efficiency and ensures the timeliness and accuracy of temperature monitoring; (10) This scheme can obtain the temperature change curve to determine the minimum temperature rise rate, thereby determining the programmable temperature control mode of the programmable temperature controller and realizing the debugging of the programmable temperature controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0024] Figure 1 is a schematic structural diagram of an electromagnetic heating device according to an embodiment of the present invention;

[0025] Figure 2 is a flow chart of an electromagnetic heating method according to an embodiment of the present invention;

[0026] In the figure: 1-high frequency generator, 2-high frequency conductive copper tube, 21-connecting part, 22-surrounding part, 3-magnetic heating component, 4-heat dissipation component, 5-thermocouple patch, 6-programmable temperature controller. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0028] The term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "inner", "lower", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may include one or more of the features explicitly or implicitly. Moreover, the terms "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0029] In order to solve the problems existing in the prior art, according to one aspect of the present application, an electromagnetic heating device is disclosed. Figure 1The electromagnetic heating device includes a high-frequency generator 1, a high-frequency conductive copper tube 2, a magnetic control heating component 3, a heat dissipation component 4, a thermocouple patch 5 and a programmable temperature controller 6. The high-frequency generator 1 is used to generate high-frequency electromagnetic waves. The high-frequency conductive copper tube 2 includes a connecting portion 21 and a surrounding portion 22. The high-frequency conductive tube is connected to the high-frequency generator 1 through the connecting portion 21. The surrounding portion 22 of the high-frequency conductive tube is arranged around the magnetic control heating component 3 to transmit the high-frequency electromagnetic waves to the magnetic control heating component 3. The magnetic control heating component 3 generates heat under the action of the high-frequency electromagnetic waves; the heat dissipation component 4 is arranged non-contact with the magnetic control heating component 3. The heat dissipation component 4 is used to disperse the heat generated by the magnetic control heating component 3. One end of the thermocouple patch 5 is in contact with the magnetic control heating component 3, and the other end of the thermocouple patch 5 is electrically connected to the programmable temperature controller 6. The programmable temperature controller 6 is connected to the high-frequency generator 1 by signal, so as to adjust the high-frequency electromagnetic wave generation state of the high-frequency generator 1 based on the current temperature of the magnetic control heating component 3 fed back by the thermocouple patch 5.

[0030] In this scheme, the magnetic control heating component 3 does not directly contact the device to be heated, but dissipates the heat of the magnetic control heating component 3 into the air based on the heat dissipation component 4 to realize electromagnetic air-insulated heating, so that the conduction device will not be extremely hot. After the heating of the magnetic control heating component 3 is stopped, the high-temperature safety hazard is reduced; and the combination of the programmable temperature controller 6 and the thermocouple patch 5 can monitor and feedback the temperature of the magnetic control heating component 3 in real time, ensure the precise control of the heating process, and avoid overheating or insufficient heating; further, the design of the heat dissipation component 4 enables the heat generated by the magnetic control heating component 3 to be effectively dispersed, realize the heating of the surrounding environment, realize the heating of the device to be heated based on the thermal environment, avoid the direct contact between the device to be heated and the magnetic control heating component 3, thereby avoiding the extreme heat phenomenon when the heating is stopped, and reducing the risk of high-temperature explosion; further, the structural design of the device enables each component (high-frequency generator 1, high-frequency conduction tube, magnetic control heating component 3, etc.) to work independently, which is convenient for maintenance and replacement, and reduces downtime. Further, in this scheme, the adjustable temperature controller can be connected through a signal, and the output state of the high-frequency generator 1 can be adjusted in real time to ensure the stability and reliability of the heating process.

[0031] In some embodiments, the magnetically controlled heating component 3 includes a magnetically controlled heating shell and a plurality of magnetically controlled heating fins, and the plurality of magnetically controlled heating fins are arranged in the magnetically controlled heating shell at intervals along the length direction of the magnetically controlled heating shell.

[0032] In some embodiments, the thickness of the magnetron heating fin is 0.3 mm to 0.8 mm, the width is 15 mm to 25 mm, the length is 25 mm to 35 mm, and the gap between two adjacent magnetron heating fins is 0.5 mm to 1 mm.

[0033] It can be connected that the magnetron heating fin is a rectangular structure, and multiple surfaces of the rectangular structure are covered with edging made of the same material, and the thickness of the edging can be set to be greater than the thickness of the magnetron heating fin, but not greater than 1.5 times the thickness of the magnetron heating fin.

[0034] It can be connected that a plurality of magnetically controlled heating fins in the magnetically controlled heating component 3 fill the magnetically controlled heating housing so that the heat can be evenly distributed in the entire housing, thereby improving the heating effect and avoiding local overheating.

[0035] In some embodiments, the surrounding portion 22 of the high-frequency conductive copper tube 2 is a quadrilateral ring structure formed by bending the length of the high-frequency conductive copper tube 2 for a target number of times. For example, in this example, an 8mm copper tube is used to surround the fin heat dissipation channel for 3 turns. It can be understood that the quadrilateral ring structure design of the high-frequency conductive copper tube 2 makes it more flexible in space utilization and heat transfer, and adapts to different installation environments and requirements.

[0036] In some embodiments, the thermocouple patch 5 is attached to the magnetically controlled heating fin, and a thermal conductive paste is applied between the thermocouple patch 5 and the magnetically controlled heating fin. Exemplarily, the thermocouple patch 5 is directly attached to the magnetically controlled heating fin. It is understandable that the thermocouple patch 5 is directly attached to the magnetically controlled heating fin, which can more accurately monitor the actual temperature of the fin, improve the response speed and accuracy of the temperature control system, and the thermal conductive paste is applied between the thermocouple patch 5 and the magnetically controlled heating fin, which further improves the heat conduction efficiency and ensures the timeliness and accuracy of temperature monitoring.

[0037] In some embodiments, the high-frequency generator 1 includes a solid-state relay, one end of the programmable temperature controller 6 is electrically connected to the thermocouple patch 5, the other end of the programmable temperature controller 6 is connected to the solid-state relay, the high-voltage terminal in and out of the solid-state relay is connected to the high-frequency conductive copper tube 2, and a capacitance component is connected in series between the high-frequency conductive copper tube 2 and the solid-state relay, and the capacitance component includes a thin-film high-frequency capacitor and a 1KΩ high-voltage resistor connected in parallel. When the device is started, when the high-frequency generator 1 heats the magnetically controlled heating fin, the surface of the magnetically controlled heating fin will rise, the thermocouple patch 5 will sense the temperature, and will compare it with the preset temperature. If the temperature exceeds the predetermined threshold, the solid-state relay will be disconnected, but when it is less than the target value, the solid-state relay will be attracted.

[0038] In some embodiments, the magnetically controlled heating fins are any one of aluminum sheets, copper sheets, nickel sheets, iron sheets, and stainless steel sheets.

[0039] In some embodiments, the magnetron heating housing and the magnetron heating fins are brazed together.

[0040] In some embodiments, the cooling fan can control the air volume within a wind speed range of 2 m / s to 5 m / s.

[0041] According to another aspect of the present application, an electromagnetic heating method is disclosed, and the method is implemented based on any of the above electromagnetic heating devices, such as Figure 2 As shown, the method includes:

[0042] S1. Start the high frequency generator and adjust the high frequency generator to the target heating temperature of the magnetically controlled heating component.

[0043] Specifically, before starting the high-frequency generator, you need to close all external vents, doors, and windows in the current environment. Confirm that the programmable thermostat and high-frequency electromagnetic generator are outside the environment, and the equipment used in the debugging environment is working as normal. First turn on the power of the high-frequency generator and adjust it to the highest heating working condition corresponding to the magnetically controlled heating fins (fins are recommended to be made of aluminum, copper, nickel, iron, stainless steel, etc.) to reduce the thickness.

[0044] S2. Start the programmable thermostat and set the programmable thermostat to fixed value temperature control mode.

[0045] Turn on the programmable thermostat and set it to the fixed value temperature control mode, set the temperature to the target temperature, set the heating time to 1 minute, and turn on the instrument recording function. Turn on the heating system with one button.

[0046] S3. Obtain a temperature change curve during the heating process of the magnetic control heating component. The temperature change curve is used to characterize the change of the temperature of the magnetic control heating component over time at a target time.

[0047] S4. Determine the minimum temperature rise rate of the magnetically controlled heating component based on the temperature change curve.

[0048] Specifically, by analyzing the temperature curve of the heating process, the minimum temperature rise rate of the temperature rise is found.

[0049] S5. Determine the programmable temperature control mode of the programmable temperature controller based on the temperature rise rate.

[0050] Specifically, if the minimum temperature rise rate is lower than the target rate, the heating parameters of the programmable temperature controller (such as power output, heating time, etc.) can be adjusted to increase the heating rate. If the minimum temperature rise rate is higher than the target rate, the heating power needs to be reduced or the heating time needs to be extended to avoid overheating and overshoot. Thus, the programmable temperature control mode is determined.

[0051] S6, restarting the high frequency generator and the programmable temperature controller, so that the programmable temperature controller controls the heating of the magnetically controlled heating component based on the programmable temperature control mode.

[0052] In some embodiments, the method further comprises:

[0053] Determine whether there is overshoot in the heating process of the magnetic control heating component based on the temperature change curve;

[0054] If there is an overshoot phenomenon in the heating process of the magnetically controlled heating component, repeat steps S1-S5 to continue debugging the temperature control mode of the programmable temperature controller.

[0055] This method can adapt to various working environments and process requirements by debugging and regulating from a fixed-value temperature control mode to a programmed temperature control mode according to different application requirements; the minimum temperature rise rate can be determined by obtaining the temperature change curve, thereby determining the programmed temperature control mode of the programmable temperature controller and realizing the debugging of the programmable temperature controller.

[0056] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0057] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. An electromagnetic heating device, characterized in that: The device comprises a high-frequency generator (1), a high-frequency conductive copper tube (2), a magnetically controlled heating component (3), a heat dissipation component (4), a thermocouple patch (5) and a programmable temperature controller (6); the high-frequency generator (1) is used to generate high-frequency electromagnetic waves; the high-frequency conductive copper tube (2) comprises a connecting portion (21) and a surrounding portion (22); the high-frequency conductive tube is connected to the high-frequency generator (1) via the connecting portion (21); the surrounding portion (22) of the high-frequency conductive tube is arranged around the magnetically controlled heating component (3) to transmit the high-frequency electromagnetic waves to the magnetically controlled heating component (3); the magnetically controlled heating component (3) Heat is generated under the action of the high-frequency electromagnetic wave; the heat dissipation component (4) is arranged in a non-contact manner with the magnetic control heating component (3); the heat dissipation component (4) is used to disperse the heat generated by the magnetic control heating component (3); one end of the thermocouple patch (5) is in contact with the magnetic control heating component (3); the other end of the thermocouple patch (5) is electrically connected to the programmable temperature controller (6); the programmable temperature controller (6) is connected to the high-frequency generator (1) by signal, so as to adjust the high-frequency electromagnetic wave generation state of the high-frequency generator (1) based on the current temperature of the magnetic control heating component (3) fed back by the thermocouple patch (5).

2. The electromagnetic heating device according to claim 1, characterized in that: The magnetically controlled heating component (3) comprises a magnetically controlled heating shell and a plurality of magnetically controlled heating fins, wherein the plurality of magnetically controlled heating fins are arranged in the magnetically controlled heating shell at intervals along the length direction of the magnetically controlled heating shell.

3. The electromagnetic heating device according to claim 1, characterized in that: The thickness of the magnetically controlled heating fin is 0.3 mm to 0.8 mm, the width is 15 mm to 25 mm, the length is 25 mm to 35 mm, and the gap between two adjacent magnetically controlled heating fins is 0.5 mm to 1 mm.

4. The electromagnetic heating device according to claim 1, characterized in that: The surrounding portion (22) of the high-frequency conductive copper tube (2) is a quadrilateral ring structure formed by bending the length of the high-frequency conductive copper tube (2) a target number of times.

5. The electromagnetic heating device according to claim 1, characterized in that: The thermocouple patch (5) is attached to the magnetically controlled heating fin, and thermal conductive paste is applied between the thermocouple patch (5) and the magnetically controlled heating fin.

6. The electromagnetic heating device according to claim 1, characterized in that: The high-frequency generator (1) comprises a solid-state relay, one end of the programmable temperature controller (6) is electrically connected to the thermocouple patch (5), the other end of the programmable temperature controller (6) is connected to the solid-state relay, the high-voltage terminal input and output ends of the solid-state relay are connected to the high-frequency conductive copper tube (2), and a capacitance and resistance component is connected in series between the high-frequency conductive copper tube (2) and the solid-state relay, and the capacitance and resistance component comprises a thin-film high-frequency capacitor and a 1KΩ high-voltage resistor connected in parallel.

7. The electromagnetic heating device according to claim 2 or 5, characterized in that: The magnetically controlled heating fins are any one of aluminum sheets, copper sheets, nickel sheets, iron sheets, and stainless steel sheets.

8. The electromagnetic heating device according to claim 2, characterized in that: The magnetron heating shell and the magnetron heating fins are connected by brazing.

9. An electromagnetic heating method, characterized in that: The method is implemented based on the electromagnetic heating device according to any one of claims 1 to 8, and the method comprises: S1, starting the high frequency generator and adjusting the high frequency generator to the target heating temperature of the magnetic control heating component; S2, starting the programmable thermostat and setting the programmable thermostat to a fixed value temperature control mode; S3, obtaining a temperature change curve of the magnetic control heating component during heating, wherein the temperature change curve is used to characterize the change of the temperature of the magnetic control heating component over time at a target time; S4, determining the minimum temperature rise rate of the magnetically controlled heating component based on the temperature change curve; S5. Determine a programmable temperature control mode of the programmable temperature controller based on the temperature rise rate; S6. Restarting the high frequency generator and the programmable temperature controller so that the programmable temperature controller controls the heating of the magnetically controlled heating component based on the programmable temperature control mode.

10. The electromagnetic heating method according to claim 9, characterized in that: The method further comprises: Determining whether the magnetic control heating component has an overshoot phenomenon during the heating process based on the temperature change curve; If the magnetically controlled heating component has an overshoot phenomenon during the heating process, repeat steps S1-S5 to continue debugging the temperature control mode of the programmable temperature controller.

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