Variable flow heating method

Abstract

The invention provides a variable-current heating method, and belongs to the technical field of heating, the variable-current heating method comprises an oil-electricity separation container, an electromagnetic induction heating element and an intelligent control system, short circuit, electromagnetism and eddy current heating principles are creatively fused, a high-frequency current enables an electromagnetic coil to generate an alternating magnetic field, and the alternating magnetic field is used for heating the oil-electricity separation container, the electromagnetic induction heating element and the intelligent control system. Conductive components in a fluid heating cavity induce to generate eddy current to heat fluid, meanwhile, a rotational flow channel enhances the heat exchange effect, a heating body is connected with corrugated aluminum alloy fins to transfer heat, an air blower provides stable hot air flow, and an intelligent control system monitors and controls the temperature and the flow in real time and maintains the constant drying temperature. And an overheating and short-circuit protection function is also possessed.

Description

Technical Field

[0001] The invention belongs to the technical field of heating, and in particular relates to a variable current heating method. Background Art

[0002] In the existing field of heating technology, traditional heating methods have many shortcomings. First, the heating efficiency is generally low, which leads to high energy consumption, increases production costs, and does not meet the requirements of energy conservation and emission reduction. Second, the phenomenon of uneven heating is relatively common, which will have an adverse effect on the quality and performance of the heated object and cannot meet some application scenarios with high requirements for heating uniformity. In addition, in terms of safety, many heating devices have defects, such as the lack of effective leakage protection and overheating protection measures, which poses a potential threat to the personal safety of operators and the normal operation of equipment.

[0003] In order to overcome these problems, the present invention proposes a variable flow heating method and device, which is committed to achieving efficient, safe and uniform heating effects through innovative design and advanced technology. Specifically, the oil-electricity separation technology is adopted to effectively avoid leakage problems and ensure safety during use. At the same time, the integration of the short-circuit, electromagnetic and eddy current trinity heating principles significantly improves the heating efficiency, and can make the heated fluid evenly heated, thereby improving the heating quality. In addition, the use of an intelligent control system can not only monitor and accurately control the heating process in real time, but also has comprehensive safety protection functions, such as overheating protection and short-circuit protection, which further ensures the stable operation of the equipment and the safety of the operators. Summary of the invention

[0004] The purpose of the present invention is to provide a variable current heating method, which aims to solve the problems of low heating efficiency, uneven heating and insufficient safety in the prior art, and to achieve efficient, safe and uniform heating effects through unique structural design and advanced technical means, improve energy utilization, ensure stable operation of equipment and personnel safety, and improve the quality and performance of the heated objects.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A variable current heating device, characterized in that it comprises:

[0007] The oil-electricity separation container has a double-layer structure, the inner layer is a fluid heating chamber, the outer layer is an electromagnetic induction heating layer, and the inner layer and the outer layer are separated by insulating materials;

[0008] An electromagnetic induction heating element, disposed in the electromagnetic induction heating layer, comprising a plurality of sets of electromagnetic coils, for generating an alternating magnetic field when powered on;

[0009] The intelligent control system integrates a temperature sensor, a flow sensor, an electromagnetic controller and a single-chip microcomputer. The temperature sensor is used to monitor the temperature, the flow sensor is used to monitor the fluid flow, the electromagnetic controller is used to control the electromagnetic coil current, and the single-chip microcomputer controls the heating process according to a preset program and a sensor feedback signal.

[0010] As a preferred solution of the present invention, when the electromagnetic induction heating element is working, a high-frequency current is passed through the electromagnetic coil to generate an alternating magnetic field, and the conductive components in the fluid heating chamber induce eddy currents in the alternating magnetic field. The Joule heat generated by the eddy currents converts electrical energy into thermal energy to heat the fluid, wherein the frequency range of the high-frequency current is 10kHz-50kHz.

[0011] As a preferred solution of the present invention, a swirl channel is provided in the fluid heating chamber, and the swirl channel causes the fluid to form a swirl in the heating chamber to enhance the heat exchange effect. The structure of the swirl channel is designed as a spiral channel with a pitch of 5mm-15mm and a channel width of 3mm-8mm.

[0012] As a preferred solution of the present invention, the heating body is connected to the fins, and the fins are used to transfer the heat generated by the heating body to the surrounding air. The material of the fins is aluminum alloy, the shape of the fins is corrugated, the connection between the fins and the heating body is welding, and the surface area of ​​the fins is 0.5m 2 -2m 2 .

[0013] As a preferred solution of the present invention, the blower is used to draw external air into the heater, and the air volume range of the blower is 50m 3 / h-500m 3 / h, wind pressure range is 500Pa-2000Pa.

[0014] As a preferred solution of the present invention, the temperature sensor monitors the temperature inside the heater and the drying hood in real time, and transmits the temperature signal to the single-chip microcomputer. The single-chip microcomputer controls the power-on state of the heating body and the wind speed of the blower within a preset temperature value range of 30°C-200°C to maintain a constant drying temperature with a temperature control accuracy of ±5°C.

[0015] As a preferred solution of the present invention, the intelligent control system has safety protection functions, including overheat protection and short circuit protection. When the temperature exceeds the preset overheat protection temperature threshold of 220°C, the power supply is automatically cut off. When a circuit short circuit is detected, heating is immediately stopped and an alarm signal is issued.

[0016] As a preferred solution of the present invention, the following steps are included:

[0017] S1. Start the electromagnetic induction heating element to generate an alternating magnetic field. The fluid in the heating chamber generates eddy current heating. At the same time, the heating body generates heat and transfers it to the surrounding air through the fins.

[0018] S2, start the blower to draw the outside air into the heater, and the air becomes hot air after heat exchange with the heating body;

[0019] S3, hot air enters the drying hood through the air outlet to dry the object to be dried;

[0020] S4, intelligent control system monitors temperature and flow in real time, controls electromagnetic induction heating elements and blowers according to preset programs, and maintains a stable heating and drying process.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. In this scheme, the advantages of various heating methods are fully utilized by innovatively integrating the heating principles of short circuit, electromagnetic and eddy current. In the electromagnetic induction heating element, a high-frequency current in a specific frequency range (10kHz-50kHz) is passed to make the electromagnetic coil generate an alternating magnetic field. The conductive components in the fluid heating chamber induce eddy currents in the alternating magnetic field. The Joule heat generated by the eddy currents efficiently converts electrical energy into thermal energy, thereby achieving rapid heating. At the same time, the reasonably designed swirl channel further enhances the heat exchange effect, allowing heat to be transferred to the heated fluid more quickly, greatly improving the heating efficiency, reducing energy waste, and reducing production costs, meeting the requirements of energy conservation and emission reduction.

[0023] 2. In this solution, the unique spiral swirl channel design in the fluid heating chamber (pitch is 5mm-15mm, channel width is 3mm-8mm), after multiple simulations and actual test verifications, can enable the fluid to form a stable and strong swirl in the heating chamber. This swirl allows the various parts of the fluid to be continuously mixed, ensuring the uniform distribution of heat in the fluid, so that the heated object can be heated evenly. Whether in large-scale heating processes in industrial production or in fine processing fields with extremely high requirements for heating uniformity, it can effectively improve the quality and performance of the heated object and meet the needs of various application scenarios.

[0024] 3. In this solution, the double-layer structure design of the oil-electric separation container, the inner layer is the fluid heating chamber, the outer layer is the electromagnetic induction heating layer, and the middle is isolated by insulating materials, which fundamentally eliminates the possibility of leakage and provides reliable safety protection for operators. The temperature sensor in the intelligent control system monitors the temperature inside the heater and the drying hood in real time and accurately, and transmits the temperature signal to the single-chip microcomputer in time. When the temperature exceeds the preset overheating protection temperature threshold of 220℃, the system will automatically cut off the power supply to prevent equipment damage or safety accidents caused by excessive temperature. In addition, the short-circuit protection function can quickly stop heating and send an alarm signal at the moment of detecting a short circuit in the circuit, reminding the operator to deal with the fault in time, ensuring that the equipment operates in a safe state, and effectively protecting the safety of the equipment and operators. DETAILED DESCRIPTION

[0025] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions 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 are within the scope of protection of the present invention.

[0026] Example 1

[0027] The present invention provides the following technical solutions:

[0028] A variable current heating device, characterized in that it comprises:

[0029] The oil-electricity separation container has a double-layer structure, the inner layer is a fluid heating chamber, the outer layer is an electromagnetic induction heating layer, and the inner layer and the outer layer are separated by insulating materials;

[0030] An electromagnetic induction heating element, disposed in the electromagnetic induction heating layer, comprising a plurality of sets of electromagnetic coils, for generating an alternating magnetic field when powered on;

[0031] The intelligent control system integrates a temperature sensor, a flow sensor, an electromagnetic controller and a single-chip microcomputer. The temperature sensor is used to monitor the temperature, the flow sensor is used to monitor the fluid flow, the electromagnetic controller is used to control the electromagnetic coil current, and the single-chip microcomputer controls the heating process according to a preset program and a sensor feedback signal.

[0032] In a specific embodiment of the present invention, the oil-electricity separation container has a double-layer structure in order to achieve oil-electricity separation. The inner layer is a fluid heating chamber, which is a space for accommodating the heated fluid; the outer layer is an electromagnetic induction heating layer, which is used to generate an alternating magnetic field to heat the fluid in the inner layer. By setting an insulating material between the two for isolation, it is possible to effectively prevent current from leaking into the fluid, thereby ensuring the safety of the heating process, which is an important safeguard for the safety of the device.

[0033] Electromagnetic induction heating element: Located in the electromagnetic induction heating layer, it is composed of multiple sets of electromagnetic coils. When high-frequency current is passed through these electromagnetic coils, an alternating magnetic field is generated. This alternating magnetic field is the key factor in the entire heating process. It enables the conductive components in the fluid heating chamber to induce eddy currents, and then converts electrical energy into thermal energy through the Joule heat generated by the eddy currents, thereby heating the fluid.

[0034] Intelligent control system: It integrates temperature sensors, flow sensors, electromagnetic controllers, and single-chip microcomputers. The temperature sensor is responsible for real-time monitoring of the temperature inside the heater and drying hood, which is the basis for achieving precise temperature control; the flow sensor is used to monitor the flow of the fluid and provide a reference for the system to adjust the heating parameters; the electromagnetic controller can control the current of the electromagnetic coil according to the instructions of the single-chip microcomputer, thereby adjusting the heating power; the single-chip microcomputer is the core of the entire intelligent control system. It controls the heating process comprehensively and accurately according to the preset program and the feedback signals from the temperature sensor and flow sensor to ensure the efficiency, stability, and uniformity of heating.

[0035] Specifically in this scheme, when the electromagnetic induction heating element is working, a high-frequency current is passed through the electromagnetic coil to generate an alternating magnetic field, and the conductive components in the fluid heating chamber induce eddy currents in the alternating magnetic field. The Joule heat generated by the eddy currents converts electrical energy into thermal energy to heat the fluid, wherein the frequency range of the high-frequency current is 10kHz-50kHz.

[0036] In this embodiment, for the electromagnetic induction heating element, a high-frequency current in the frequency range of 10kHz-50kHz is selected to generate an alternating magnetic field in the electromagnetic coil. Through experiments and optimization, it is determined that within this frequency range, the conductive components in the fluid heating chamber can be more effectively induced to generate eddy currents, thereby achieving efficient conversion of electrical energy to thermal energy and meeting the heating requirements.

[0037] Specifically in this solution, a swirl channel is provided in the fluid heating chamber, and the swirl channel causes the fluid to form a swirl in the heating chamber to enhance the heat exchange effect. The structure of the swirl channel is designed as a spiral channel with a pitch of 5mm-15mm and a channel width of 3mm-8mm.

[0038] In this embodiment, the swirl channel in the fluid heating chamber adopts a spiral channel design, with a pitch of 5mm-15mm and a channel width of 3mm-8mm. This structural design is determined after multiple simulations and actual tests, and can form a stable and strong swirl of the fluid in the heating chamber, enhance the heat exchange effect, and ensure that the fluid is heated more evenly.

[0039] In the specific embodiment of the present invention, the heating body is connected to the fins, and the fins are used to transfer the heat generated by the heating body to the surrounding air. The material of the fins is aluminum alloy, the shape of the fins is corrugated, the connection between the fins and the heating body is welding, and the surface area of ​​the fins is 0.5m 2 -2m 2 .

[0040] In this embodiment, the fins are made of aluminum alloy, which has good thermal conductivity and can quickly transfer the heat generated by the heater. The fins are designed to be corrugated, which further increases the contact area with the air. The fins are connected to the heater by welding, which ensures the firmness of the connection and the heat conduction efficiency. The surface area of ​​the fins is controlled at 0.5m 2 -2m 2 to meet different heating power and heat dissipation requirements.

[0041] In the specific embodiment of the present invention, the blower is used to draw external air into the heater, and the air volume range of the blower is 50m 3 / h-500m 3 / h, wind pressure range is 500Pa-2000Pa.

[0042] In this embodiment: the air volume range of the blower is set to 50m 3 / h-500m 3 / h, and the wind pressure range is 500Pa-2000Pa. This is determined according to the overall design of the heating device and the actual application scenario, which can ensure that under different working conditions, sufficient external air can be sucked into the heater to fully exchange heat with the heating body, providing a stable hot air flow for the drying process.

[0043] Specifically in this solution, the temperature sensor monitors the temperature inside the heater and the drying hood in real time, and transmits the temperature signal to the single-chip microcomputer. The single-chip microcomputer controls the power-on state of the heating body and the wind speed of the blower within the preset temperature value range of 30°C-200°C to maintain a constant drying temperature with a temperature control accuracy of ±5°C.

[0044] In this embodiment: For the temperature control part, the temperature sensor monitors the temperature inside the heater and the drying hood in real time and accurately, and transmits the temperature signal to the single-chip microcomputer in time. The temperature value range preset by the single-chip microcomputer is between 30℃-200℃. When the temperature is lower than the preset value, the single-chip microcomputer controls the heating body to increase the power-on time or increase the current intensity to increase the heat generation; when the temperature is higher than the preset value, the power-on time of the heating body is reduced or the current intensity is reduced, and the wind speed of the blower is adjusted at the same time to keep the amount and temperature of the hot air entering the drying hood stable, thereby achieving a constant drying temperature with a temperature control accuracy of ±5℃.

[0045] Specifically in this solution, the intelligent control system has safety protection functions, including overheat protection and short circuit protection. When the temperature exceeds the preset overheat protection temperature threshold of 220°C, the power supply is automatically cut off. When a circuit short circuit is detected, heating is immediately stopped and an alarm signal is issued.

[0046] In this embodiment: In terms of safety protection, the overheat protection function of the intelligent control system is set to automatically cut off the power supply when the temperature exceeds 220°C. This is a threshold value determined after a detailed analysis of the thermal performance and safety requirements of the heating device. Once the temperature reaches this threshold, the system will immediately stop heating to prevent safety accidents caused by excessive temperature. The short-circuit protection function can quickly stop heating and send out an alarm signal at the moment of detecting a short circuit in the circuit, reminding the operator to deal with the fault in time to ensure the safe operation of the device.

[0047] Specifically in this scheme, S1, the electromagnetic induction heating element is started to generate an alternating magnetic field, the fluid is induced to generate eddy current heating in the heating chamber, and the heating body generates heat and transfers it to the surrounding air through the fins;

[0048] S2, start the blower to draw the outside air into the heater, and the air becomes hot air after heat exchange with the heating body;

[0049] S3, hot air enters the drying hood through the air outlet to dry the object to be dried;

[0050] S4, intelligent control system monitors temperature and flow in real time, controls electromagnetic induction heating elements and blowers according to preset programs, and maintains a stable heating and drying process.

[0051] In this embodiment: During the entire heating and drying process, the electromagnetic induction heating element is first started to generate an alternating magnetic field, so that the conductive components in the fluid heating chamber induce eddy current heating, and at the same time, the heat generated by the heating body is transferred to the surrounding air through the fins. Then the blower is started to suck the outside air into the heater, and the air becomes hot air after sufficient heat exchange with the heating body. The hot air enters the drying hood through the air outlet and dries the object to be dried. In this process, the intelligent control system continuously monitors the temperature and flow in real time, and accurately controls the working state of the electromagnetic induction heating element and the wind speed of the blower according to the preset program to ensure that the heating and drying process is carried out stably to meet different drying needs.

[0052] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A variable current heating device, characterized in that: include: The oil-electricity separation container has a double-layer structure, the inner layer is a fluid heating chamber, the outer layer is an electromagnetic induction heating layer, and the inner layer and the outer layer are separated by insulating materials; An electromagnetic induction heating element, disposed in the electromagnetic induction heating layer, comprising a plurality of sets of electromagnetic coils, for generating an alternating magnetic field when powered on; The intelligent control system integrates a temperature sensor, a flow sensor, an electromagnetic controller and a single-chip microcomputer. The temperature sensor is used to monitor the temperature, the flow sensor is used to monitor the fluid flow, the electromagnetic controller is used to control the electromagnetic coil current, and the single-chip microcomputer controls the heating process according to a preset program and a sensor feedback signal.

2. A variable current heating device according to claim 1, characterized in that: When the electromagnetic induction heating element is working, a high-frequency current is passed through the electromagnetic coil to generate an alternating magnetic field. The conductive components in the fluid heating chamber induce eddy currents in the alternating magnetic field. The Joule heat generated by the eddy currents converts electrical energy into thermal energy to heat the fluid, wherein the frequency range of the high-frequency current is 10kHz-50kHz.

3. A variable current heating device according to claim 2, characterized in that: A swirl channel is provided in the fluid heating chamber, and the swirl channel causes the fluid to form a swirl in the heating chamber to enhance the heat exchange effect. The structure of the swirl channel is designed to be a spiral channel with a pitch of 5mm-15mm and a channel width of 3mm-8mm.

4. A variable current heating device according to claim 3, characterized in that: The heating body is connected to the fins, which are used to transfer the heat generated by the heating body to the surrounding air. The fins are made of aluminum alloy and are corrugated in shape. The fins are connected to the heating body by welding. The surface area of ​​the fins is 0.5m 2 -2m 2 .

5. A variable current heating device according to claim 4, characterized in that: The blower is used to draw external air into the heater, and the air volume range of the blower is 50m 3 / h-500m 3 / h, wind pressure range is 500Pa-2000Pa.

6. A variable current heating device according to claim 5, characterized in that: The temperature sensor monitors the temperature inside the heater and the drying hood in real time, and transmits the temperature signal to the single-chip microcomputer. The single-chip microcomputer controls the power-on state of the heating body and the wind speed of the blower within the preset temperature value range of 30°C-200°C to maintain a constant drying temperature with a temperature control accuracy of ±5°C.

7. A variable current heating device according to claim 6, characterized in that: The intelligent control system has safety protection functions, including overheat protection and short circuit protection. When the temperature exceeds the preset overheat protection temperature threshold of 220°C, the power supply is automatically cut off. When a circuit short circuit is detected, heating is immediately stopped and an alarm signal is issued.

8. A variable current heating method according to claim 7, applied to a variable current heating device according to claim 7, characterized in that: The steps include: S1. Start the electromagnetic induction heating element to generate an alternating magnetic field. The fluid in the heating chamber generates eddy current heating. At the same time, the heating body generates heat and transfers it to the surrounding air through the fins. S2, start the blower to draw the outside air into the heater, and the air becomes hot air after heat exchange with the heating body; S3, hot air enters the drying hood through the air outlet to dry the object to be dried; S4, intelligent control system monitors temperature and flow in real time, controls electromagnetic induction heating elements and blowers according to preset programs, and maintains a stable heating and drying process.