A new electric heating furnace with electromagnetic coil heating source

Abstract

This utility model discloses a novel electric furnace with an electromagnetic coil heating source, including a furnace body, a heat insulation plate on the upper side of the furnace body, a coil assembly on the heat insulation plate, a cast iron plate or a carbon cast plate on the coil assembly, a temperature controller in contact with the coil assembly inside the heat insulation plate, and a circuit board on the furnace body connected to the coil assembly and the temperature controller respectively for controlling the on and off operation of the coil assembly and cutting off the power to the coil assembly when the temperature controller detects that the coil assembly has reached the preset temperature. The cast iron plate or carbon cast plate on the coil assembly has the advantages of high-efficiency energy conversion and rapid heating.

Description

[Technical Field]

[0001] This utility model relates to a novel electric furnace with an electromagnetic coil heating source. [Background Technology]

[0002] Current induction cookers typically feature a contact surface made of microcrystalline glass or ceramic glass to improve aesthetics and facilitate cleaning. During use, a magnetic cookware is placed on the contact surface; the magnetic field generated by the coil passes through the surface, causing eddy currents in the cookware and generating heat. However, the use of microcrystalline glass or ceramic glass contact surfaces on induction cookers has drawbacks such as low energy transfer efficiency, uneven temperature distribution, poor temperature stability, and low strength, making them prone to damage. [Utility Model Content]

[0003] This invention overcomes the shortcomings of the prior art and provides a novel electric furnace with an electromagnetic coil heating source.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A novel electric furnace with an electromagnetic coil heating source is characterized by comprising a furnace body, an insulation plate on the upper side of the furnace body, a coil assembly on the insulation plate, a casting plate on the coil assembly, a temperature controller in contact with the coil assembly inside the insulation plate, and a circuit board on the furnace body connected to the coil assembly and the temperature controller respectively for controlling the on / off operation of the coil assembly and cutting off the power to the coil assembly when the temperature controller detects that the coil assembly has reached a preset temperature. The casting plate is an iron casting plate or a carbon casting plate.

[0006] The novel electric furnace with an electromagnetic coil heating source, as described above, is characterized in that: the upper side of the heat insulation plate is provided with a heat insulation plate through hole, the coil assembly is provided with a coil assembly through hole corresponding to the heat insulation plate through hole, the lower side of the casting plate is provided with a casting plate connecting post that passes through the coil assembly through hole and contacts the heat insulation plate through hole, and the lower end of the casting plate connecting post is provided with a connecting post notch that connects the coil assembly and the heat insulation plate through hole.

[0007] The novel electric furnace with an electromagnetic coil heating source, as described above, is characterized in that: a positioning groove is provided on the upper side of the heat insulation plate, a through hole of the heat insulation plate is provided in the positioning groove, and the lower end of the casting plate connecting column is provided in the positioning groove.

[0008] The novel electric furnace with an electromagnetic coil heating source, as described above, is characterized in that: a heat dissipation groove is provided on the upper side of the heat insulation plate, a positioning groove and a temperature controller are respectively set in the heat dissipation groove, the coil assembly is fixedly connected to the casting plate, the coil assembly is set on the upper side of the heat dissipation groove and a gap is provided between the coil assembly and the edge of the heat dissipation groove, and a plurality of ventilation holes are provided on the bottom surface of the heat dissipation groove.

[0009] The novel electric furnace with an electromagnetic coil heating source, as described above, is characterized in that: an installation groove is provided on the upper side of the heat insulation plate, a heat dissipation groove is provided in the installation groove, and a plurality of casting plate support protrusions extending downward and contacting the installation groove are provided at the edge of the casting plate.

[0010] The novel electric furnace with an electromagnetic coil heating source, as described above, is characterized in that: a casting plate groove for accommodating the coil assembly is provided on the lower side of the casting plate, and a casting plate support protrusion is provided at the edge of the opening of the casting plate groove.

[0011] The novel electric furnace with an electromagnetic coil heating source, as described above, is characterized in that: a cooling fan connected to a circuit board is provided inside the furnace body.

[0012] The novel electric furnace with an electromagnetic coil heating source, as described above, is characterized in that: the upper side of the furnace body is provided with a furnace body opening, the inner side of the furnace body opening is provided with a plurality of furnace body support protrusions arranged in a ring, and the outer side of the heat insulation plate is provided with a plurality of heat insulation plate protrusions that respectively cooperate with the furnace body support protrusions.

[0013] The novel electric furnace with an electromagnetic coil heating source, as described above, is characterized in that: a furnace body limiting protrusion is provided on the inner side of the furnace body opening near the opening position, and a gap is provided between the furnace body limiting protrusion and the furnace body supporting protrusion for the heat insulation plate protrusion to pass through.

[0014] The novel electric furnace with an electromagnetic coil heating source, as described above, is characterized in that: the coil assembly includes a coil base and a coil disposed on the coil base, the coil assembly has a through hole disposed on the coil base, and the temperature controller is a thermocouple temperature controller.

[0015] The beneficial effects of this utility model are:

[0016] 1. This utility model features an iron or carbon cast plate on the coil assembly, offering advantages in efficient energy conversion and rapid heating. The iron or carbon cast plate leverages the advantages of electromagnetic coils; the alternating magnetic field induces eddy currents at the bottom of the iron cast plate, resulting in an energy transfer efficiency of 80%-90%, far exceeding the approximately 30%-50% heating energy transfer efficiency of traditional resistance heating. Simultaneously, cast iron and carbon casting can aid in accelerating the heating process. While their thermal conductivity is not as high as aluminum or copper, their large heat capacity allows for rapid absorption and even distribution of heat, reducing localized overheating, especially in the initial heating stage where the pot temperature can be rapidly increased.

[0017] 2. The iron or carbon cast iron plate of this invention has the advantages of temperature uniformity and stability. Cast iron and carbon cast iron have uniform heat distribution characteristics. As a heat buffer layer, the iron or carbon cast iron plate can compensate for the problem of uneven magnetic field of the induction cooker coil, especially when using small-diameter cookware. Through its own heat conduction, the temperature distribution of the bottom of the pot is more uniform, which is suitable for cooking that requires stable heat, such as frying. At the same time, it can reduce frequent start-stop. Induction cookers usually adjust the output by intermittent power switching at low power settings, while the heat storage capacity of the iron or carbon cast iron plate can continuously release heat during the power-off interval, reducing temperature fluctuations and preventing the food from deteriorating in taste due to frequent heating.

[0018] 3. The iron or carbon cast plate of this utility model enhances compatibility and safety, and can prevent dry burning. The iron or carbon cast plate can delay overheating, providing a longer response time for the induction cooker's temperature controller and reducing the risk caused by dry burning or sudden rise in oil temperature.

[0019] 4. The iron or carbon cast plate of this utility model can achieve structural protection and improve durability, reduce coil wear, and the iron or carbon cast plate acts as a physical isolation layer to prevent cookware from directly rubbing against the ceramic panel or coil, thus extending the life of the induction cooker; at the same time, it can resist impact and prevent deformation. The high strength of cast iron can withstand the pressure of heavy cookware and prevent the panel from breaking due to gravity or impact. [Image Description]

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is an exploded view of the present invention;

[0022] Figure 3 This is an exploded view of the furnace body of this utility model;

[0023] Figure 4 This is a schematic diagram of the lower side of the cast iron disc of this utility model;

[0024] Figure 5 This is a cross-sectional view of the present invention. [Detailed Implementation]

[0025] The technical solutions in the embodiments of this utility model will now be clearly and completely described in conjunction with the accompanying drawings.

[0026] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this utility model are only used to explain the relative positional relationship and movement of the components in a specific posture (as shown in the attached figure). If the specific posture changes, the directional indication will also change accordingly. Furthermore, descriptions involving "preferred," "second-best," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined as "preferred" or "second-best" may explicitly or implicitly include at least one of those features.

[0027] like Figure 1-5 As shown, a novel electric furnace with an electromagnetic coil heating source includes a furnace body 1, a heat insulation plate 2 on the upper side of the furnace body 1, a coil assembly 3 on the heat insulation plate 2, a casting plate 4 on the coil assembly 3, and a temperature controller 5 in contact with the coil assembly 3 inside the heat insulation plate 2. The furnace body 1 has a circuit board 6 connected to both the coil assembly 3 and the temperature controller 5, used to control the energization of the coil assembly 3 and to de-energize the coil assembly 3 when the temperature controller 5 detects that the coil assembly 3 has reached a preset temperature. The casting plate 4 is either an iron casting plate or a carbon casting plate. The temperature controller 5 is a thermocouple temperature controller. During operation, the circuit board 6 controls the coil assembly 3 to be energized, causing the iron or carbon casting plate 4 to generate induced eddy currents, thereby heating the pot placed on the iron or carbon casting plate 4. During operation, the temperature controller 5 monitors the temperature of the coil assembly 3 in real time, and when the temperature of the coil assembly 3 reaches the preset temperature, the circuit board 6 controls the coil assembly 3 to de-energize and stop working, achieving anti-dry-burning protection. In this case, the use of cast iron or carbon cast iron plates has the advantages of greatly improving energy transfer efficiency, increasing heat capacity to achieve sustainable heating, achieving uniform and rapid heating of the pot body, reducing wear on coil components, and providing impact resistance.

[0028] like Figure 2 and 4 As shown in Figure 5, the upper side of the heat insulation plate 2 is provided with a heat insulation plate through hole 21, and the coil assembly 3 is provided with a coil assembly through hole 31 corresponding to the heat insulation plate through hole 21. The lower side of the casting plate 4 is provided with a casting plate connecting post 41 that passes through the coil assembly through hole 31 and contacts the heat insulation plate through hole 21, so that the coil assembly 3 can be stably connected to the casting plate 4. The lower end of the casting plate connecting post 41 is provided with a connecting post recess 42 that connects the coil assembly 3 and the heat insulation plate through hole 21, so that the wire can be led out from the furnace body 1 to connect and supply power to the coil assembly 3.

[0029] like Figure 2 and Figure 5 As shown, the upper side of the heat insulation plate 2 is provided with a positioning groove 22, the heat insulation plate through hole 21 is set in the positioning groove 22, and the lower end of the casting plate connecting column 41 is set in the positioning groove 22, which can enable the iron casting plate or carbon casting plate 4 and the coil assembly 3 to be quickly positioned and installed on the heat insulation plate 2.

[0030] like Figure 2 and Figure 5 As shown, the heat insulation plate 2 has a heat dissipation groove 23 on its upper side. The positioning groove 22 and the temperature controller 5 are respectively set in the heat dissipation groove 23. The coil assembly 3 is fixedly connected to the casting plate 4. The coil assembly 3 is set on the upper side of the heat dissipation groove 23 and a gap is set between the coil assembly 3 and the edge of the heat dissipation groove 23. The bottom surface of the heat dissipation groove 23 has multiple ventilation holes 24. The furnace body 1 is equipped with a cooling fan 7 connected to the circuit board 6, which allows air to enter the heat dissipation groove 23 of the heat insulation plate 2 from the gap between the coil assembly 3 and the edge of the heat dissipation groove 23, and then be discharged outside the furnace body 1 through the ventilation holes 24 and the action of the cooling fan 7 to achieve heat dissipation.

[0031] like Figure 2 and Figure 5 As shown, the heat insulation plate 2 has an installation groove 25 on its upper side and a heat dissipation groove 23 is set in the installation groove 25. The edge of the casting plate 4 has multiple casting plate support protrusions 43 that extend downward and contact the installation groove 25, so that there is a gap between the coil assembly 3 and the edge of the heat dissipation groove 23 to allow air to enter. The lower side of the casting plate 4 has a casting plate groove 44 to accommodate the coil assembly 3. The casting plate support protrusions 43 are set at the edge of the opening of the casting plate groove 44, so that the coil assembly 3 can be installed in the iron casting plate or carbon casting plate 4, which improves the heating efficiency and better protects the coil assembly 3.

[0032] like Figure 2-5 As shown, the upper side of the furnace body 1 has a furnace body opening 11. Multiple furnace body support protrusions 12 are arranged around the inner side of the furnace body opening 11. Multiple heat insulation plate protrusions 26, each cooperating with the furnace body support protrusions 12, are arranged on the outer side of the heat insulation plate 2. A furnace body limiting flange 13 is arranged around the inner side of the furnace body opening 11 near the opening. A gap exists between the furnace body limiting flange 13 and the furnace body support protrusions 12, allowing the heat insulation plate protrusions 26 to pass through. When installing the heat insulation plate 2, rotating the heat insulation plate 2 causes the heat insulation plate protrusions 26 to rotate within the gap between the furnace body limiting flange 13 and the furnace body support protrusions 12, allowing the heat insulation plate protrusions 26 to rotate onto the furnace body support protrusions 12, thus securing the heat insulation plate 2 within the furnace body opening 11 of the furnace body 1.

[0033] like Figure 2 As shown, the coil assembly 3 includes a coil base 32 and a coil 33 disposed on the coil base 32, which better protects the coil 33 and better enables the cast iron or carbon cast iron plate 4 to generate eddy current heating; the coil assembly through hole 31 is disposed on the coil base 32, so that the coil assembly 3 and the cast iron plate 4 are more tightly connected.

[0034] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A novel electric heater with electromagnetic coil heat source, characterized in that: It includes a furnace body (1), a heat insulation plate (2) on the upper side of the furnace body (1), a coil assembly (3) on the heat insulation plate (2), a casting plate (4) on the coil assembly (3), a temperature controller (5) in contact with the coil assembly (3) inside the heat insulation plate (2), a circuit board (6) on the furnace body (1) that is connected to the coil assembly (3) and the temperature controller (5) respectively to control the power supply of the coil assembly (3) and to cut off the power supply of the coil assembly (3) when the temperature controller (5) detects that the coil assembly (3) has reached the preset temperature, and the casting plate (4) is an iron casting plate or a carbon casting plate.

2. A novel electric heater with electromagnetic coil heat source as claimed in claim 1, wherein: The upper side of the heat insulation plate (2) is provided with a heat insulation plate through hole (21), the coil assembly (3) is provided with a coil assembly through hole (31) corresponding to the heat insulation plate through hole (21), the lower side of the casting plate (4) is provided with a casting plate connecting post (41) that passes through the coil assembly through hole (31) and contacts the heat insulation plate through hole (21), and the lower end of the casting plate connecting post (41) is provided with a connecting post notch (42) that connects the coil assembly (3) and the heat insulation plate through hole (21).

3. A novel electric heater with electromagnetic coil heat source as claimed in claim 2, wherein: The heat insulation plate (2) has a positioning groove (22) on its upper side, the heat insulation plate through hole (21) is set in the positioning groove (22), and the lower end of the casting plate connecting column (41) is set in the positioning groove (22).

4. A novel electric heater with electromagnetic coil heat source as claimed in claim 3, wherein: The heat insulation plate (2) has a heat dissipation groove (23) on its upper side. The positioning groove (22) and the temperature controller (5) are respectively set in the heat dissipation groove (23). The coil assembly (3) is fixedly connected to the casting plate (4). The coil assembly (3) is set on the upper side of the heat dissipation groove (23) and a gap is set between the coil assembly (3) and the edge of the heat dissipation groove (23). The bottom surface of the heat dissipation groove (23) has multiple ventilation holes (24).

5. A novel electric heater with electromagnetic coil heat source as claimed in claim 4, wherein: The heat insulation plate (2) has an installation groove (25) on its upper side, and a heat dissipation groove (23) is set in the installation groove (25). The edge of the casting plate (4) has multiple casting plate support protrusions (43) that extend downward and contact the installation groove (25).

6. A novel electric heater with electromagnetic coil heat source as claimed in claim 5, wherein: The lower side of the casting disk (4) is provided with a casting disk groove (44) for accommodating the coil assembly (3), and the casting disk support protrusion (43) is located at the edge of the opening of the casting disk groove (44).

7. A novel electric heater with electromagnetic coil heat source as claimed in claim 4, wherein: The furnace body (1) is equipped with a cooling fan (7) connected to the circuit board (6).

8. A novel electric heater with electromagnetic coil heat source as claimed in claim 1, wherein: The furnace body (1) has a furnace body opening (11) on its upper side. The inner side of the furnace body opening (11) has multiple furnace body support protrusions (12) arranged around it. The outer side of the heat insulation plate (2) has multiple heat insulation plate protrusions (26) that cooperate with the furnace body support protrusions (12).

9. A novel electric heater with electromagnetic coil heat source as claimed in claim 8, wherein: The inner side of the furnace body opening (11) near the opening is provided with a furnace body limiting protrusion (13) arranged around it. There is a gap between the furnace body limiting protrusion (13) and the furnace body support protrusion (12) for the heat insulation plate protrusion (26) to pass through.

10. A novel electric heater with electromagnetic coil heat source as claimed in claim 2, wherein: The coil assembly (3) includes a coil chassis (32) and a coil (33) disposed on the coil chassis (32). The coil assembly through hole (31) is disposed on the coil chassis (32). The temperature controller (5) is a thermocouple temperature controller.

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