Electromagnetic heating device and coating oven

Abstract

The utility model discloses an electromagnetic heating device and a coating oven, the electromagnetic heating device carries out heating through an electromagnetic heating rod, because the electromagnetic heating rod is provided with a temperature sensor, the temperature of the surface of the heating rod can be monitored in real time, explosion caused by overhigh temperature of the heating rod is avoided, and an explosion-proof partition plate is arranged in an explosion-proof shell, so that the explosion-proof shell is convenient to carry. The anti-explosion partition plate is arranged between every two adjacent electromagnetic heating rods and can separate the heating area, and the purpose is to reduce the diffusion range of explosion. The electromagnetic heating rods are all located in the anti-explosion shell, the electromagnetic heating rods which are likely to be abnormal are limited in the anti-explosion shell, and when the device is abnormal, the influence range of the device can be effectively limited. In conclusion, the electromagnetic heating device provided by the utility model is safer to use.

Description

Technical Field

[0001] The utility model relates to the field of pole piece heating, and particularly relates to an electromagnetic heating device and a coating oven. Background Technique

[0002] In the current oven heating, there are various heating methods, such as U-shaped tubes, PTC, oil furnaces, steam, electric heating tubes, etc. Among them, electric heating tubes are one of the main heating methods, but they have problems such as slow heating efficiency and high energy consumption. In the prior art, new heating methods are being studied, and electromagnetic heating is used to replace the previous electric heating tube heating. Through a large number of tests, electromagnetic heating can also be widely applied in oven heating. Compared with the above-mentioned several heating methods, it has the advantages of fast heating speed, high energy conversion efficiency, power saving, etc., which can improve the heating efficiency of the oven and save energy. However, the current application range of electromagnetic heating is relatively narrow. Without intervention, it can only be used in negative electrode coating. Due to a certain amount of nmp (i.e., N-methylpyrrolidone) in the positive electrode, there may be a risk of explosion if the temperature of the electromagnetic heating element is too high. Therefore, it is necessary to design a more secure electromagnetic heating device. Content of the Utility Model

[0003] In order to overcome the deficiencies of the prior art, the utility model provides an electromagnetic heating device and a coating oven, which can solve the problem of the unsafe use of existing electromagnetic heating.

[0004] On the one hand, the utility model provides an electromagnetic heating device, including an explosion-proof housing and electromagnetic heating rods. A plurality of explosion-proof partitions are arranged inside the explosion-proof housing, and the explosion-proof housing is divided into several compartments by the explosion-proof partitions. Each of the compartments is provided with the electromagnetic heating rods; a temperature sensor is arranged on the electromagnetic heating rods for detecting the temperature of the electromagnetic heating rods.

[0005] As a further improvement of the above technical solution, the electromagnetic heating rod includes a finned tube and an electric wire, and the electric wire is wound inside the finned tube.

[0006] As a further improvement of the above technical solution, connection holes are arranged on the side walls of the explosion-proof housing near both ends of the finned tube, and both ends of the finned tube are in interference fit with the connection holes.

[0007] As a further improvement of the above technical solution, the electric wires extend out of the two connection holes respectively, and two electric wire shields are respectively connected to the outer walls of the explosion-proof housing near both ends of the finned tube, and the electric wires extending out of the two connection holes are respectively located inside the two electric wire shields.

[0008] As a further improvement of the above technical solution, a controller housing is arranged on the outer wall of the explosion-proof housing, and the controller housing is used to accommodate a controller.

[0009] As a further improvement of the above technical solution, a plurality of temperature sensors are provided, and each of the temperature sensors is respectively disposed in each of the compartments.

[0010] As a further improvement of the above technical solution, the temperature sensor is a thermocouple sensor.

[0011] As a further improvement of the above technical solution, the temperature sensor is electrically connected to a temperature display instrument and an over-temperature protector.

[0012] On the other hand, the present invention further provides a coating oven, including an exhaust fan and the aforementioned electromagnetic heating device, and the exhaust fan is used to draw air into the electromagnetic heating device.

[0013] As a further improvement of the above technical solution, the control circuit of the exhaust fan is connected to the control circuit of the electromagnetic heating device through an interlock circuit.

[0014] The beneficial effects of the present invention are as follows: The electromagnetic heating device provided by the present invention is heated by electromagnetic heating rods. Since temperature sensors are provided on the electromagnetic heating rods, the temperature of the surface of the heating rods can be monitored in real time to prevent explosion caused by excessive temperature. Moreover, the explosion-proof partition divides the interior of the explosion-proof housing into several compartments, and electromagnetic heating rods are provided in each compartment, which can separate the heating areas to reduce the spread range of the explosion. When the device malfunctions, the setting of the explosion-proof housing can effectively limit the influence range. In summary, the electromagnetic heating device provided by the present invention is safer to use. Description of the Drawings

[0015] The present invention will be further described below in conjunction with the drawings and embodiments.

[0016] Figure 1 is a schematic structural diagram of the electromagnetic heating device provided by the preferred embodiment of the present invention;

[0017] Figure 2 is a cross-sectional view of the electromagnetic heating device provided by the preferred embodiment of the present invention.

[0018] Reference numerals: 1, explosion-proof housing; 2, electromagnetic heating rod; 3, compartment;

[0019] 11, explosion-proof partition; 12, connection hole; 13, wire shield; 14, controller housing; 21, temperature sensor; 22, finned tube; 23, wire. Detailed Embodiments

[0020] The concept, specific structure and technical effects of the present utility model will be clearly and completely described below in conjunction with embodiments and drawings to fully understand the purpose, features and effects of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, other embodiments obtained by those skilled in the art without creative efforts belong to the scope protected by the present utility model. In addition, all connection / connection relationships involved in the patent do not simply refer to the direct connection of components, but refer to the composition of a more optimal connection structure by adding or reducing connection accessories according to specific implementation situations. For example, fixed connection / fixed installation can be selected from screw connection, bolt connection, pin connection, key connection, bonding, tenon-mortise connection, welding, riveting and other methods as needed. For example, detachable connection can be selected from screw connection, bolt connection, threaded connection, snap connection, tenon-mortise connection, magic tape connection and other methods as needed. The various technical features in the creation of the present utility model can be combined interactively without conflicting with each other.

[0021] Please refer to Figure 1 , a preferred embodiment of the present utility model provides an electromagnetic heating device, which includes an explosion-proof housing 1 and an electromagnetic heating rod 2. A plurality of explosion-proof partitions 11 are provided inside the explosion-proof housing 1. The explosion-proof partitions 11 divide the interior of the explosion-proof housing 1 into several compartments 3, and an electromagnetic heating rod 2 is provided in each compartment 3; a temperature sensor 21 is provided on the electromagnetic heating rod 2 for detecting the temperature of the electromagnetic heating rod 2. This electromagnetic heating device is heated by the electromagnetic heating rod 2. Since the temperature sensor 21 is provided on the electromagnetic heating rod 2, the temperature on the surface of the electromagnetic heating rod 2 can be monitored in real time to avoid explosion caused by excessive temperature. Moreover, the explosion-proof partitions 11 divide the interior of the explosion-proof housing 1 into several compartments 3, and an electromagnetic heating rod 2 is provided in each compartment 3, which can separate the heating areas to reduce the spread range of the explosion. When the device malfunctions, the setting of the explosion-proof housing 1 can effectively limit its influence range. In summary, the electromagnetic heating device provided by the present utility model is safer to use.

[0022] In this embodiment, multiple electromagnetic heating rods 2 are provided inside each compartment 3, reducing the number of explosion-proof partitions 11, which is beneficial to cost reduction.

[0023] The electromagnetic heating rod 2 includes a finned tube 22 and an electric wire 23. The electric wire 23 is wound inside the finned tube 22. When the electric wire 23 is powered on, an alternating magnetic field will be generated. The alternating magnetic field will generate eddy currents on the surface of the electromagnetic heating rod 2 to generate heat, causing the entire surface of the electromagnetic heating rod 2 to quickly heat up. The finned tube 22 is used to increase the heat exchange surface area of the electromagnetic heating rod 2, improve the heat exchange efficiency, and enhance the heating efficiency of the device.

[0024] The side walls of the explosion-proof housing 1 near both ends of the finned tube 22 are provided with connection holes 12. The two ends of the finned tube 22 are in interference fit with the connection holes 12, so that the finned tube 22 is fixed inside the explosion-proof housing 1, and thus the entire electromagnetic heating rod 2 is fixedly connected to the explosion-proof housing 1.

[0025] The electric wires 23 extend out of the two connection holes 12 respectively. Two wire shields 13 are respectively connected to the outer walls of the explosion-proof housing 1 near both ends of the finned tube 22. The electric wires 23 extending out of the two connection holes 12 are respectively located inside the two wire shields 13. The electric wires 23 are covered by the wire shields 13, avoiding being exposed and contacting with nmp for a long time, reducing the risk of explosion.

[0026] The outer wall of the explosion-proof housing 1 is provided with a controller housing 14. The controller housing 14 is used to accommodate the controller, isolating the electrical components inside the controller from the outside world, preventing high-temperature gases such as nmp from entering, and further enhancing safety.

[0027] In this embodiment, the controller housing 14 is connected to one side of one of the wire shields 13 away from the explosion-proof housing 1. The controller housing 14 and the explosion-proof housing 1 are spaced apart, further making the controller arranged inside the controller housing 14 far away from the electromagnetic heating rod 2 arranged inside the explosion-proof housing 1, further reducing the risk of explosion.

[0028] A plurality of temperature sensors 21 are provided. Each temperature sensor 21 is respectively arranged in each compartment 3 to monitor the temperature in each heating zone, avoiding the situation that the electromagnetic heating rod 2 in a certain compartment 3 has too high temperature and is not monitored in time.

[0029] The temperature sensor 21 is a thermocouple sensor, which has the characteristics of stable performance, large temperature measurement range, and the signal can be transmitted over a long distance, and has a simple structure and is easy to use. The thermocouple sensor can directly convert heat energy into an electrical signal and output a DC voltage signal, making display, recording and transmission very easy.

[0030] The temperature sensor 21 is electrically connected to a temperature display instrument and an over-temperature protector. The temperature display instrument is used to display the real-time temperature, facilitating the monitoring of the temperature and avoiding the surface temperature of the electromagnetic heating rod 2 exceeding 250 °C, causing the explosion of nmp; when the temperature is too high, the over-temperature protector can forcibly reduce the working efficiency of this electromagnetic heating device, avoiding continued temperature rise and causing an explosion.

[0031] The present utility model also provides a coating oven, including an exhaust fan and the electromagnetic heating device of the above embodiment. The exhaust fan is used to draw air into the electromagnetic heating device, and the heated hot air is used to heat and dry the electrode plates placed inside the oven.

[0032] The control circuit of the exhaust fan is connected to the control circuit of the electromagnetic heating device through an interlock circuit. When the exhaust fan stops abnormally, the electromagnetic heating device will also stop heating. The exhaust fan can take away the heat generated by the electromagnetic heating device and form hot air for drying the electrode plates, so as to keep the temperature in the electromagnetic heating device constant. After the exhaust fan stops abnormally, the electromagnetic heating device continues to heat up, which is likely to cause an explosion. Therefore, it is necessary to connect the control circuit of the exhaust fan to the control circuit of the electromagnetic heating device through an interlock circuit to ensure the safety of the coating oven during use.

[0033] The above is a specific description of the preferred embodiment of the present invention, but the present invention is not limited to the described embodiment. Those skilled in the art can make various equivalent deformations or substitutions without departing from the spirit of the present invention, and these equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. An electromagnetic heating device, characterized in that: It includes an explosion-proof shell and an electromagnetic heating rod. Several explosion-proof partitions are arranged inside the explosion-proof shell. The explosion-proof partitions divide the interior of the explosion-proof shell into several compartments. The electromagnetic heating rod is arranged in each compartment; a temperature sensor is provided on the electromagnetic heating rod for detecting the temperature of the electromagnetic heating rod.

2. The electromagnetic heating device according to claim 1, characterized in that: The electromagnetic heating rod includes a fin tube and an electric wire, and the electric wire is wound inside the fin tube.

3. The electromagnetic heating device according to claim 2, characterized in that: The side walls of the explosion-proof housing close to the two ends of the fin tube are provided with connecting holes, and the two ends of the fin tube are interference-fitted with the connecting holes.

4. The electromagnetic heating device according to claim 3, characterized in that: The electric wires extend out of the two connection holes respectively. The outer walls of the explosion-proof shell close to the two ends of the fin tube are connected to two electric wire shields respectively. The electric wires extending out of the two connection holes are located in the two electric wire shields respectively.

5. The electromagnetic heating device according to claim 1, characterized in that: A controller housing is provided on the outer wall of the explosion-proof housing, and the controller housing is used to accommodate a controller.

6. The electromagnetic heating device according to claim 1, characterized in that: A plurality of temperature sensors are provided, and each temperature sensor is respectively arranged in each compartment.

7. The electromagnetic heating device according to claim 1, characterized in that: The temperature sensor is a thermocouple sensor.

8. The electromagnetic heating device according to claim 1, characterized in that: The temperature sensor is electrically connected to a temperature display instrument and an over-temperature protector.

9. A coating oven, characterized in that: It comprises an exhaust fan and the electromagnetic heating device according to any one of claims 1 to 8, wherein the exhaust fan is used to draw air into the electromagnetic heating device.

10. The coating oven according to claim 9, characterized in that: The control circuit of the exhaust fan is connected to the control circuit of the electromagnetic heating device through an interlocking circuit.

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