TWI834997B - Electromagnetic heating device - Google Patents

Abstract

The present invention is an electromagnetic heating device, including an electromagnetic heating furnace and at least one electromagnetic heating body. The electromagnetic heating furnace comprises a furnace body and an electromagnetic induction coil. The surface of the furnace body is deposed an opening. The furnace body is deposed a containing groove. The containing groove is connected to the opening. The electromagnetic induction coil is arranged inside the furnace body. The two ends of the electromagnetic induction coil are connected to an alternating power supply unit. The electromagnetic heating body is placed in the containing groove. The alternating power supply unit provides the alternating current to the electromagnetic induction coil. So that eddy currents will appear at the electromagnetic heating body. The electromagnetic heating body uses eddy current to generate the Joule heating effect to heat up.

Description

Electromagnetic heating body, electromagnetic heating furnace and electromagnetic heating device

The present invention relates to a heating device, in particular to an electromagnetic heating device.

In the traditional way of heating an object, heat is gradually conducted from the surface of the object to the interior of the object. The larger the volume of the object, the slower the process of heat conduction. When the surface temperature of an object reaches the required temperature, the interior of the object has not yet reached the required temperature. In recent years, induction heating (including high-frequency and microwave heating) developed by utilizing the "principle of molecular friction and heat generation of the heated object itself" has been widely used for heating purposes. In this heating method, heat is not gradually transferred from the surface to the interior, but is a method of converting electromagnetic wave energy directly through the object into heat.

The above-mentioned heating method is usually called "electromagnetic heating". The principle of electromagnetic heating is to regularly change the direction of the current, so the magnetic lines of force generated by the magneto-thermal coil will continue to change directions, producing an alternating magnetic field, and the alternating magnetic lines of force will exist. The dielectric material in the magnetothermal coil generates alternating current (ie, eddy current). The eddy current causes the carriers of the dielectric material to move irregularly at high speed. The carriers and atoms collide and rub against each other to generate heat energy, thereby heating the dielectric material. Effect. Current induction cookers, electromagnetic ranges, and electromagnetic heating rice cookers all use electromagnetic heating technology, which causes the positively charged molecules of the object (dielectric material) used as the heating target to move at high speed and generate heat through friction.

For induction cookers, the alternating current from a general socket is first converted into direct current, and then the direct current is converted into high-frequency current, which flows through the "magnetic heating coil" under the "ceramic panel". High-frequency current changes the direction of the current regularly, so the magnetic lines of force generated by the magnetothermal coil continuously change directions. When the direction of the current changes, the direction of the magnetic lines of force also changes, that is, an alternating magnetic field is generated. When an iron pot (dielectric material) is placed on this alternating magnetic field, the bottom of the pot is induced by the alternating magnetic field, generating an induced current. The induced current generated is also called "eddy current" (eddy current). Eddy currents generate heat due to the resistance of metal conductors.

Since induction cookers use magnetic induction to generate heat in pots, not all pots or utensils are suitable. Therefore, cooking utensils suitable for placing on induction cookers are made of materials that can induce changes in magnetic fields, such as stainless steel pots, stainless steel kettles, flat-bottomed iron pots, etc., while earthenware pots, ceramic pots, aluminum pots, and aluminum kettles etc. are unsuitable cooking utensils.

However, some people prefer to use earthenware pots or pots to heat in a charcoal stove when making tea or decoction Chinese medicine. However, the charcoal stove uses charcoal burning to provide heat. During the burning process of charcoal, white smoke and carbon monoxide (CO ), carbon dioxide, sulfur oxides, PM10, PM2.5 suspended particles, and polycyclic aromatic hydrocarbons (PAHs) and other harmful substances are really not suitable for continued use. Therefore, some people have designed electric heating wire stoves imitating the shape of charcoal stoves. There is a ceramic heat-conducting element above the electric heating wire furnace. There is a groove on the outer surface of the ceramic heat-conducting element. An electric heating wire is installed inside the groove. After the electric heating wire is energized, it uses the principle of the thermal effect of the current to generate heat. In this way, the electric heating wire furnace can be used. Heating earthenware pots or pots, however, the heat utilization rate due to the thermal effect of the current is not good, and the electric energy loss of the resistance wire heating method is as high as more than 50%.

In addition, Taiwan's new patent No. M571457 (new patent name: multi-functional energy-saving panel) has a thermally conductive plate body made of highly thermally conductive metal, and is combined with a magnetically conductive plate made of magnetically conductive material at the bottom of the thermally conductive plate body. Plate body. Frozen food can be placed on the heat-conducting plate to be used as a thawing plate; or, it can be used as a heat-conducting plate. The plate is placed on the induction cooker in such a way that it is in contact with the pot, and is used as a magnetic conductive plate for the induction cooker to heat pots, copper pots or glass pots; in particular, the temperature generated by the magnetic conductive plate can be quickly transmitted to the pot through the heat conductive plate. Tools can also achieve the effect of saving energy.

However, whether it is an electric heating wire stove or a multi-functional energy-saving panel, people can no longer experience the feeling of adding charcoal to the charcoal stove to adjust the heat conduction to the pottery pot or pot, making people lose the experience of adding charcoal for heating. Therefore, how to consume less electricity while still giving people the opportunity to experience an experience similar to adding charcoal for heating or reducing charcoal for cooling will be an urgent problem to be solved.

In view of the problems of the prior art, the purpose of the present invention is to provide an electromagnetic heating furnace in the form of electromagnetic heating, and an electromagnetic heating body like charcoal can be provided in the electromagnetic heating furnace, and the electromagnetic heating body can be added or removed from the electromagnetic heating furnace. , so that the heat from the electromagnetic heating body is conducted to cooking utensils such as pots or pots on the electromagnetic heating stove that cannot be electromagnetic induction, achieving a similar effect to adding charcoal to a traditional charcoal stove for heating or reducing charcoal cooling.

The invention is an electromagnetic heating furnace, which includes a furnace body and an electromagnetic induction coil. The surface of the furnace body is provided with an opening, and the furnace body is provided with a receiving groove at a position opposite to the opening. The receiving groove is connected to the opening, and the electromagnetic induction coil is located on the furnace body. Inside the body, both ends of the electromagnetic induction coil are connected to the alternating power supply unit, and at least one electromagnetic heating body is provided in the accommodation slot, and the power required by the electromagnetic induction coil is provided through the alternating power supply unit, so that there will be Eddy currents appear, and the Joule heating effect of the eddy currents heats up the conductor, thereby achieving heating.

The furnace body is provided with a plurality of protrusions around the opening to support the cooking utensils placed above the opening.

Among them, a plurality of accommodation units are provided in the accommodation tank, and each accommodation unit is provided with an electromagnetic heating body.

Wherein, a heat conduction plate is provided inside the accommodation tank close to the opening, and the heat conduction plate absorbs the heat energy released by the electromagnetic heating body.

According to one object of the present invention, an electromagnetic heating body is provided, which includes a main body and a shaped body. The system is made of magnetically conductive material or metal material, and the shaping system is wrapped around the periphery of the body, and the ignition point of the shaped body is It is higher than the maximum temperature generated by the electromagnetic heating body and the electromagnetic induction coil heating.

Among them, the modeling system is made of charcoal.

Among them, the system is hollow, and a thermal insulation body is provided at the hollow position of the body.

Among them, the thermal insulation system is made of ceramic materials.

The invention is an electromagnetic heating device, which includes an electromagnetic heating furnace and at least one electromagnetic heating body. The electromagnetic heating furnace includes a furnace body and an electromagnetic induction coil. The surface of the furnace body is provided with an opening, and the position of the furnace body relative to the opening is provided with an opening. The accommodation tank is connected to the opening, and the electromagnetic induction coil is located inside the furnace body. Both ends of the electromagnetic induction coil are connected to the alternating power supply unit, and the electromagnetic heating body is placed in the accommodation tank and provided by the alternating power supply unit. The AC required for the electromagnetic induction coil causes eddy currents to appear inside the electromagnetic heating body. The Joule heating effect of the eddy currents causes the conductor to heat up, thereby achieving heating.

According to the above, the present invention can use an electromagnetic heating furnace to heat the electromagnetic heating body. In this way, the power consumption of the present invention will not be higher than that of the electric heating wire, and the user can have the same use experience as a traditional charcoal stove without sacrificing energy. There are harmful substances produced by burning charcoal in traditional charcoal stoves, and cooking utensils made of any material can receive heat conduction from the opening of the electromagnetic heating stove, so people can still use their usual clay pots or pots on the electromagnetic heating stove. Apply heat.

1:Electromagnetic heating furnace

10: Furnace body

100:Open your mouth

102: Accommodation slot

104:Protrusion

106: Accommodation unit

108:Thermal conductive plate

1080:Perforation

12:Electromagnetic induction coil

14:AC power supply unit

2:Electromagnetic heating body

20:Ontology

22:Styling body

24:Insulation body

Figure 1 is a schematic diagram of the electromagnetic heating furnace of the present invention.

Figure 2 is a schematic cross-sectional view of the electromagnetic heating furnace of the present invention.

Figure 3 is a schematic cross-sectional view of another electromagnetic heating furnace according to the present invention.

Figure 4 is a schematic diagram of an electromagnetic heating element of the present invention.

Figure 5 is a schematic diagram of another electromagnetic heating element of the present invention.

Figure 6 is a schematic diagram of another electromagnetic heating element of the present invention.

In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but are not used to limit the present invention.

Please refer to Figure 1. The present invention is an electromagnetic heating furnace. The electromagnetic heating furnace 1 includes a furnace body 10, an electromagnetic induction coil 12 and an alternating power supply unit 14. The surface of the furnace body 10 is provided with an opening 100. The furnace body 10 is located in A receiving groove 102 is provided at a position opposite to the opening 100 , and the receiving groove 102 communicates with the opening 100 . The electromagnetic induction coil 12 is arranged inside the furnace body 10, and both ends of the electromagnetic induction coil 12 are connected to the alternating power supply unit 14, so that the alternating power supply unit 14 can provide power that continuously changes the direction of the current to the electromagnetic induction coil 12, thereby generating an alternating current. The alternating magnetic field is changed, and the alternating power supply unit 14 converts general commercial power (usually alternating current, frequency 50/60Hz) into the required working power supply, and the accommodation tank 102 provides at least one electromagnetic heating body 2 to be placed. When the electromagnetic heating When the body 2 is placed in the holding tank 102 (as shown in Figure 2), after the alternating power supply unit 14 is started, the alternating magnetic field generated by the electromagnetic induction coil 12 will cause eddy currents to appear inside the electromagnetic heating body 2. Joule heating effect of electric current The electromagnetic heating body 2 should be heated up, and the temperature of the electromagnetic heating body 2 can be controlled by the operating power provided by the alternating power supply unit 14, so that the temperature of the electromagnetic heating body 2 can be adjusted to rise, fall or maintain a fixed temperature.

In order to provide a gap between the electromagnetic heating furnace 1 and the cooking utensils placed on the electromagnetic heating furnace 1 so that the heat of the electromagnetic heating body 2 can be properly dissipated to the outside world, in the present invention, please refer to Figure 1. The body 10 is provided with a plurality of protrusions 104 around the opening 100 to provide support for cooking utensils placed above the opening 100, so that the heat generated by the electromagnetic heating body 2 can be absorbed by the cooking utensils and can also be appropriately vented to the outside world. In addition, the present invention can also be used like a traditional charcoal furnace. Increasing or reducing the number of electromagnetic heating bodies 2 in the electromagnetic heating furnace 1 will increase or decrease the temperature. Of course, it can also be used with the same number of electromagnetic heating bodies 2 as mentioned above. Control the temperature by adjusting the working power supply.

In order to enable the electromagnetic heating furnace 1 to evenly provide heat to the outside world, in the present invention, as shown in FIG. body 2, and each accommodation unit 106 is equal in size and evenly distributed in the accommodation slot 102, so that the user can neatly place the electromagnetic heating body 2 into the accommodation slot 102, so that the electromagnetic heating body 2 in the accommodation slot 102 can Delivers heat evenly.

In the present invention, as shown in FIG. 3 , a heat conduction plate 108 is provided inside the accommodation tank 102 close to the opening 100 . The heat conduction plate 108 absorbs the heat energy released by the electromagnetic heater 2 , and the heat conduction plate 108 is provided with a plurality of The perforation 1080 allows the heat energy released by the electromagnetic heating body 2 to be directly transmitted to the direction of the opening 100 through the perforation 1080. When the alternating power supply unit 14 is turned off, the heat energy saved by the heat conduction plate 108 can be released and transmitted to the cooking utensil. To achieve the purpose of heat preservation and slowly lowering the temperature, just like the ashes of traditional charcoal still emit a slight amount of heat after burning, it has the effect of heat preservation and slowly lowering the temperature.

In the present invention, as shown in FIG. 1 , the alternating power supply unit 14 can be disposed in the furnace body 10 and connected to the electromagnetic induction coil 12 . In addition, the alternating power supply unit 14 can be connected to the market just like an induction cooker. electricity and convert the mains power into the required working power. Or the alternating power supply unit 14 can be arranged outside the furnace body 10 and connected to the electromagnetic induction coil 12 in the furnace body 10, and connected to general commercial power, and converts the commercial power into the required working power supply. Furthermore, the alternating power supply unit 14 is composed of a filter, a rectifier, and a power converter (composed of an inverter and a matching transformer) to convert the mains power into the required working power supply. Furthermore, it can also The feedback circuit is connected to the electromagnetic induction coil 12 and the control circuit to detect the working voltage of the electromagnetic induction coil 12. The control circuit determines whether the working voltage meets the requirements, and can be connected to the power converter through the control circuit to adjust the control working voltage.

Please refer to Figure 4. The present invention is an electromagnetic heating body. The electromagnetic heating body 2 includes a body 20 and a modeling body 22. The body 20 is made of magnetically conductive material or metal material, and the modeling body 22 is made of magnetic conductive material or metal material. Covering the periphery of the main body 20, and the ignition point of the molded body 22 is higher than the maximum temperature generated by the electromagnetic heating body 2 heated by the electromagnetic induction coil 12, so that the molded body 22 will not be destroyed by the temperature of the electromagnetic heating body 2. Essence.

Please refer to Figure 5. The main body 20 can be hollow, and an insulating body 24 is provided at the hollow position of the main body 20. The insulating body 24 is made of ceramic material. In this way, when the electromagnetic heating furnace 1 stops, After the alternating power supply unit 14 supplies working power, the thermal insulation body 24 can achieve the purpose of maintaining heat and slowly lowering the temperature.

Please refer to Figure 6. The main body 20 can be hollow, and the heat preservation body 24 is placed in the hollow position of the main body 20, and the modeling body 22 is then wrapped on the surface of the main body 20, so that the electromagnetic heating body 2 is The insulating body 24 can provide a heat preservation function, the heating body can provide a heating effect, and the modeling body 22 can be used to create various required shapes.

In one embodiment of the present invention, in order to allow people to use the electromagnetic heating body 2 added to the electromagnetic heating furnace 1 just like adding charcoal to a charcoal furnace, the shaped body 22 is made of charcoal, and the charcoal is made of charcoal according to different The ignition point temperature of the types also differs, but generally it is between 150 and 500 degrees Celsius. For example: the ignition point of binchotan charcoal is 200 and 500 degrees Celsius, and the ignition point temperature of bamboo charcoal is between 300 and 400 degrees Celsius. Generally speaking, the ignition point of charcoal is between 150 and 500 degrees Celsius. It is between 150 and 300 degrees Celsius. Therefore, as long as the alternating power supply unit 14 controls the working power supply and keeps the electromagnetic heating body 2 below the ignition point of the charcoal, the cooking utensil can still be heated, but the modeling body 22 will not be burned.

If you still have doubts about whether the shaped body 22 is made of charcoal, in the present invention, the shaped body 22 can be made of ceramic material and made into the shape of charcoal, and the body 20 can be wrapped in the shaped body 22 , the similar effect can still be maintained, but the doubts about using charcoal as the modeling body 22 are completely eliminated.

In addition, the present invention is an electromagnetic heating device, which includes an electromagnetic heating furnace 1 and at least one electromagnetic heating body 2. The electromagnetic heating body 2 is placed in the receiving tank 102 and provides the required work to the electromagnetic induction coil 12 through the alternating power supply unit 14. The power supply causes eddy current to appear inside the electromagnetic heating body 2, and the Joule heating effect of the eddy current causes the conductor to heat up, thereby achieving heating.

According to the above, the electromagnetic heating furnace 1 of the present invention can perform electromagnetic induction heating by adding the electromagnetic heating body 2 to the holding tank 102, so that the use method of the electromagnetic heating furnace 1 is close to that of a traditional charcoal furnace, and there are no traditional charcoal furnaces. Harmful substances produced by burning charcoal in the charcoal stove. In addition, the electric energy loss of the present invention will not be higher than that of the traditional electric heating wire heating method, and cooking utensils of any material can receive heat from the opening 100 of the electromagnetic heating stove 1 The conduction of the electromagnetic heating element 2 allows people to still use the customary pottery pot or pot in the electromagnetic heating furnace 1 for heating. In addition, the electromagnetic heating element 2 can be made into a charcoal-like appearance, which is more environmentally friendly. To increase the feeling of using charcoal for heating, of course the shaped body 22 does not necessarily need to be designed to be shaped like charcoal, and the furnace body 10 of the present invention is not only designed to be shaped like a charcoal stove.

The above detailed description is a specific description of possible embodiments of the present invention. However, the foregoing embodiments are not intended to limit the patent scope of the present invention. Any equivalent implementation or modification that does not depart from the technical spirit of the present invention shall be included in within the patent scope of this case.

1:Electromagnetic heating furnace

10: Furnace body

100:Open your mouth

104:Protrusion

12:Electromagnetic induction coil

14:AC power supply unit

Claims (5)

An electromagnetic heating furnace includes: a furnace body, the surface of the furnace body is provided with an opening, and the furnace body is provided with an accommodating groove at a position relative to the opening, the accommodating groove is communicated with the opening, and at least one is provided in the accommodating groove. An electromagnetic heating body; an electromagnetic induction coil, which is located inside the furnace body; and an alternating power supply unit, which is connected to both ends of the electromagnetic induction coil. The alternating power supply unit provides the power required for the electromagnetic induction coil, The electromagnetic heating body is heated by electromagnetic induction; wherein a heat conductive plate is provided inside the accommodation tank close to the opening; wherein the furnace body is provided with a plurality of protrusions around the opening; wherein the accommodation tank is provided with a plurality of protrusions. Each accommodation unit is provided with one of the electromagnetic heating bodies. An electromagnetic heating body, which includes: a body made of magnetically permeable material or metal material, wherein the body is hollow, and an insulating body is provided at the hollow position of the body, and wherein the body is hollow The thermal insulation system is made of ceramic material; and a molding body, the molding system is wrapped around the periphery of the body, and the ignition point of the molding body is higher than the maximum temperature generated by the electromagnetic heating element when heated by an electromagnetic induction coil ; Wherein, the electromagnetic heating system is arranged in a holding tank, and a heat conductive plate is provided inside the holding tank near an opening on the surface of the furnace body. The electromagnetic heating body according to claim 2, wherein the modeling system is made of charcoal. An electromagnetic heating body includes: A body, the body is made of magnetically permeable material or metal material, and the body is hollow; and a thermal insulation body is provided at a hollow position of the body, wherein the thermal insulation system is made of ceramic material. wherein, the electromagnetic heating system is arranged in a receiving tank, and a heat conductive plate is provided inside the receiving tank near an opening on the surface of a furnace body. An electromagnetic heating device, including: the electromagnetic heating furnace as described in claim 1; and the electromagnetic heating body as described in any one of claims 2 to 4.

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