Electromagnetic heating core device
By designing a spiral heating core and high-frequency magnetic field in the electromagnetic heating device, increasing the contact area and time between the medium and metal, and fixing the isolation cylinder with a flange, the inefficiency problem caused by the straight-tube structure is solved and efficient electromagnetic Heating effect.
Patent Information
- Application Number
- CN201711435011.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2017-12-26
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2037-12-26
AI Technical Summary
The existing electromagnetic heating devices adopt a straight-cylinder structure, resulting in the problems of short heating distance, low efficiency conversion and low heating efficiency.
Design an electromagnetic heating core device including an outer layer and an inner layer isolation cylinder. A spiral heating core is arranged between the outer layer and the inner layer coil to generate a high-frequency alternating magnetic field through high-frequency current, thereby increasing the metal heating core and medium. Contact area and contact time, use flanges to fix the isolation cylinder to reduce heat loss and improve electric heating conversion efficiency.
By increasing the contact area and time between the medium and the heating core, the temperature rise speed and efficiency of the heating medium are improved, the electric heating conversion efficiency is improved, and efficient heating in a limited space is achieved.
Smart Images
Figure CN107969037B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of electromagnetic heating, and in particular relates to an electromagnetic heating core device. Background Art
[0002] With the acceleration of the national "coal to electricity" process, seeking clean energy heating has become a top priority in the current heating field. Since the currently proposed heating modes all have certain limitations, the heating mode that uses electric heating as a heating application has been recognized by most people, especially with the rapid development of electromagnetic heating technology, the application of electromagnetic heating in the heating field has become more common. However, the current electromagnetic heating technology focuses on how to improve control accuracy and increase high-power applications, but ignores the efficiency conversion problem in the heating process, resulting in most heating core structures being traditional design models. There are also some designs that increase the contact area by changing the inner surface structure, but the improvement in heating efficiency is also very limited. It is precisely based on this that the speed and effect of increasing the water temperature in the heating core are not obvious enough.
[0003] Existing heating cores usually adopt a straight-cylindrical metal core structure. Due to the limited space of the electromagnetic heating device, the straight-cylindrical metal core is limited by the heating distance of the medium, and the temperature difference between the inlet and outlet water is small. At the same time, due to the limited contact area between the pipeline and the medium, the heat energy generated by the metal core cannot be fully taken away, resulting in low electric heat conversion efficiency. Summary of the invention
[0004] The purpose of the present invention is to provide an electromagnetic heating core device to solve the problem that the existing electromagnetic heating device adopts a straight-cylinder structure, has a short heating distance and low efficiency conversion, resulting in low heating efficiency.
[0005] In order to achieve the above object, the technical solution adopted by the present invention is:
[0006] An electromagnetic heating core device comprises an outer isolation tube and an inner isolation tube arranged in the outer isolation tube, an outer coil is arranged on the outer wall of the outer isolation tube, an inner coil is arranged on the outer wall of the inner isolation tube, a spiral heating core is wound between the outer isolation tube and the inner coil, flanges are arranged on the top and bottom of the outer isolation tube and the inner isolation tube respectively, cable holes are arranged on the flanges, two ends of the inner coil are respectively passed through the cable holes, a pipeline outlet is arranged on the top flange to be connected to the outlet end of the heating core, and a pipeline inlet is arranged on the bottom flange to be connected to the inlet end of the heating core.
[0007] The heating core is wound at 1 / 4-1 / 2 between the outer isolation tube and the inner coil.
[0008] The outer coil and the inner coil are respectively wound on the outer walls of the outer isolation tube and the inner isolation tube.
[0009] The inner coil and the outer coil are respectively arranged in the middle position of the inner isolation tube and the outer isolation tube, and the coverage area of the inner coil and the outer coil occupies 1 / 2-2 / 3 of the area of the inner isolation tube and the outer isolation tube respectively.
[0010] The central axis of the outer isolation cylinder overlaps with the central axis of the inner isolation cylinder.
[0011] The inner coil and the outer coil have the same number of turns and the same winding direction.
[0012] The outer isolation tube and the inner isolation tube are hollow structures.
[0013] The pipeline outlet and the pipeline inlet are respectively arranged on both sides of the inner isolation cylinder.
[0014] The outer isolation tube and the inner isolation tube are insulating structures.
[0015] The surface of the inner coil is provided with a heat-insulating and flame-retardant layer.
[0016] Compared with the prior art, the present invention has the following beneficial effects:
[0017] The present invention generates a high-frequency alternating magnetic field by passing a high-frequency current through the inner coil and the outer coil, forms an eddy current on the surface of the heating core, causes the temperature of the heating core to rise rapidly, and passes a low-temperature medium into the interior of the heating core to take away the heat, thereby achieving the purpose of heating the medium. The heating core is designed to be spiral, which can greatly increase the contact area between the metal heating core and the medium to be heated, increase the time that the medium contacts the heating core, and is conducive to sufficient heat exchange, thereby achieving an improvement in heating efficiency; since the inner and outer coils simultaneously generate a high-frequency magnetic field, the spiral heating core can also increase the heated area of the heating core, and since the coils are wound in the same direction, the field strength per unit area can also be increased, which helps to quickly increase the temperature. A flange is set to fix the inner and outer isolation cylinders to ensure that the gap between the heating core and the flange is reduced, reduce the heat loss in the isolation cylinder, and further improve the electric heat conversion efficiency. Since the inner and outer coils are wound in the same direction, the magnetic flux of the contact part of the outer surface of the pipeline can be increased, thereby increasing the heating effect. The present invention can greatly increase the contact area between the pipeline and the heating medium in the effective space, extend the heating time within a unit distance, improve the heating efficiency, and increase the temperature rise rate. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a longitudinal cross-sectional view of the present invention;
[0019] Figure 2 A top view of the present invention;
[0020] Figure 3 It is a schematic diagram of the structure of the heating core;
[0021] The meanings of the accompanying numbers are as follows: 1. Outer isolation cylinder; 2. Inner isolation cylinder; 3. Outer coil; 4. Inner coil; 5. Heating core; 6. Flange; 7. Cable hole; 8. Pipeline outlet; 9. Outlet end; 10. Pipeline inlet; 11. Inlet end. DETAILED DESCRIPTION
[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0023] like Figure 1-3 As shown, an electromagnetic heating core device comprises an outer isolation tube 1 and an inner isolation tube 2 arranged in the outer isolation tube 1, the outer isolation tube 1 and the inner isolation tube 2 are hollow structures, the outer isolation tube 1 and the inner isolation tube 2 are insulating structures, the central axis of the outer isolation tube 1 overlaps the central axis of the inner isolation tube 2, an outer coil 3 is arranged on the outer wall of the outer isolation tube 1, an inner coil 4 is arranged on the outer wall of the inner isolation tube 2, a heat insulating and flame retardant layer is arranged on the surface of the inner coil 4, the outer coil 3 and the inner coil 4 are respectively wound on the outer walls of the outer isolation tube 1 and the inner isolation tube 2, the wire diameter is 25-35mm, the inner coil 4 and the outer coil 3 are wound with the same number of turns and the same winding direction, the inner coil 4 and the outer coil 3 are respectively arranged at the middle position of the inner isolation tube 2 and the outer isolation tube 1 The coverage area of the inner coil 4 and the outer coil 3 accounts for 1 / 2-2 / 3 of the area of the inner isolation tube 2 and the outer isolation tube 1 respectively. A spiral heating core 5 is wound between the outer isolation tube 1 and the inner coil 4. The wall thickness of the heating core 5 is 2-3mm. The heating core 5 is wound at 1 / 4-1 / 2 between the outer isolation tube 1 and the inner coil 4. Flanges 6 are respectively arranged on the top and bottom of the outer isolation tube 1 and the inner isolation tube 2. Cable holes 7 are arranged on the flange 6. The two ends of the inner coil 4 are respectively passed through the cable holes 7. A pipeline outlet 8 is arranged on the top flange 6 to be connected with the outlet end 9 of the heating core 5. A pipeline inlet 10 is arranged on the bottom flange 6 to be connected with the inlet end 11 of the heating core 5. The pipeline outlet 8 and the pipeline inlet 10 are respectively arranged on both sides of the inner isolation tube 2.
[0024] Before operation, connect the outer coil 3 to the power supply, pass the two ends of the inner coil 4 through the cable holes 7 and connect them to the power supply, and then connect the inlet end 11 and the outlet end 9 of the heating core 5 to the medium pipeline respectively.
[0025] During operation, a high-frequency current is passed through the outer coil 3 and the inner coil 4, and the frequency of the current is controlled at 20-30KHz, thereby generating a high-frequency alternating magnetic field and forming eddy currents on the surface of the heating core 5, causing the temperature of the heating core 5 to rise rapidly. At this time, a low-temperature medium is introduced through the inlet end 11 of the heating core 5, so that the low-temperature medium takes away the heat when passing through the spiral structure of the heating core 5, thereby heating the medium. The heated medium can be discharged from the outlet end 9 of the heating core 5.
Claims
1. An electromagnetic heating core device, characterized in that: The invention comprises an outer isolation tube (1) and an inner isolation tube (2) arranged inside the outer isolation tube (1), wherein the central axis of the outer isolation tube (1) overlaps with the central axis of the inner isolation tube (2), the outer isolation tube (1) and the inner isolation tube (2) are hollow structures, an outer coil (3) is arranged on the outer wall of the outer isolation tube (1), an inner coil (4) is arranged on the outer wall of the inner isolation tube (2), a spiral heating core (5) is wound between the outer isolation tube (1) and the inner coil (4), flanges (6) are arranged on the top and bottom of the outer isolation tube (1) and the inner isolation tube (2), a cable hole (7) is arranged on the flange (6), two ends of the inner coil (4) are respectively inserted into the cable hole (7), a pipeline outlet (8) is arranged on the top flange (6) and connected to the outlet end (9) of the heating core (5), and a pipeline inlet (10) is arranged on the bottom flange (6) and connected to the inlet end (11) of the heating core (5); Before operation, the outer coil (3) is connected to a power source, and the two ends of the inner coil (4) are respectively passed through the cable holes (7) and connected to a power source, and then the inlet end (11) and the outlet end (9) of the heating core (5) are respectively connected to the medium pipeline; During operation, a high-frequency current is passed through the outer coil (3) and the inner coil (4), thereby generating a high-frequency alternating magnetic field and forming eddy currents on the surface of the heating core (5), causing the temperature of the heating core (5) to rise rapidly. At this time, a low-temperature medium is introduced through the inlet end (11) of the heating core (5), and the heated medium flows out from the outlet end (9) of the heating core (5).
2. The electromagnetic heating core device according to claim 1, characterized in that: The heating core (5) is wound at a position 1 / 4 to 1 / 2 between the outer layer isolation cylinder (1) and the inner layer coil (4).
3. The electromagnetic heating core device according to claim 1 or 2, characterized in that: The outer coil (3) and the inner coil (4) are respectively wound on the outer walls of the outer isolation cylinder (1) and the inner isolation cylinder (2).
4. The electromagnetic heating core device according to claim 3, characterized in that: The inner coil (4) and the outer coil (3) are respectively arranged at the middle position of the inner isolation tube (2) and the outer isolation tube (1), and the coverage area of the inner coil (4) and the outer coil (3) occupies 1 / 2 to 2 / 3 of the area of the inner isolation tube (2) and the outer isolation tube (1).
5. The electromagnetic heating core device according to claim 4, characterized in that: The inner coil (4) and the outer coil (3) have the same number of winding turns and the same winding direction.
6. The electromagnetic heating core device according to claim 5, characterized in that: The pipeline outlet (8) and the pipeline inlet (10) are respectively arranged on both sides of the inner isolation cylinder (2).
7. The electromagnetic heating core device according to claim 6, characterized in that: The outer isolation tube (1) and the inner isolation tube (2) are insulating structures.
8. The electromagnetic heating core device according to claim 7, characterized in that: The surface of the inner coil (4) is provided with a heat-insulating and flame-retardant layer.