CN116017796A - Electromagnetic heating device - Google Patents
Electromagnetic heating device Download PDFInfo
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- CN116017796A CN116017796A CN202111232137.6A CN202111232137A CN116017796A CN 116017796 A CN116017796 A CN 116017796A CN 202111232137 A CN202111232137 A CN 202111232137A CN 116017796 A CN116017796 A CN 116017796A
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Abstract
The invention relates to an electromagnetic heating device, which comprises a heating coil, a heating control circuit component, a heat dissipation component and an insulation component, wherein the heating control circuit component is electrically connected with the heating coil, the heat dissipation component comprises a heat transfer unit and a medium heat dissipation unit, the heat transfer unit is detachably fixed with an electronic element and in heat transfer contact with the electronic element, a heat dissipation medium flows in the medium heat dissipation unit, and the heat dissipation medium is in heat transfer contact with the surface of the heat transfer unit; the insulation assembly comprises a circuit insulation piece and a coil insulation piece, wherein the circuit insulation piece and the coil insulation piece are respectively arranged outside the electronic element and the heating coil and are respectively in heat transfer contact with the outer surfaces of the electronic element and the heating coil. The invention can insulate and seal the electronic element, improve the waterproof performance and simultaneously not influence the heat dissipation performance of the electronic element, effectively ensure the long-term stability of the insulating and sealing, and prolong the service life of the device.
Description
Technical Field
The invention relates to the technical field of electromagnetic heating, in particular to an electromagnetic heating device.
Background
Electromagnetic heating (IH) is also called electromagnetic Induction heating, and the principle of the electromagnetic Induction heating is that alternating current is introduced into an electronic circuit board or a coil and the like to generate an alternating magnetic field, a heating rod made of metal is arranged in the alternating magnetic field, the heating rod made of metal generates eddy current in the alternating magnetic field, carriers in the heating rod move at high speed irregularly, and the carriers collide with atoms and rub with each other to generate Heat energy, so that articles or fluids to be heated are heated.
The existing electromagnetic heating device is not applied to wading environment mostly, insulating sealing is not needed, so that excessive heat generated by electronic elements of a bare electronic circuit board, a heating coil and other heating control circuits in the working process can be directly subjected to heat exchange with air to achieve the purpose of heat dissipation and cooling, and a fan is further arranged in part of products for enhancing the heat dissipation rate, and rapid cooling is realized by accelerating the air flow rate of the surfaces of heat-generating components so as to avoid the problems that the working performance is influenced and even the safety risk is caused due to overheating of the inside of the products.
In order to avoid the problem that external moisture or liquid medium enters the electromagnetic heating device in the use process and is further contacted with electronic components such as electronic circuit boards, heating coils or electronic elements of other heating control circuits, and the like, electric shock danger is caused, insulating sealing is generally adopted to perform insulating sealing on the electromagnetic heating device, and heat cannot be directly dissipated from the electronic circuit boards, the heating coils or the electronic elements of other heating control circuits after the insulating sealing, so that the electronic elements are burnt out or the insulating sealing is damaged and loses efficacy easily due to overheat after a period of operation, and the problem of electric shock danger is caused.
Disclosure of Invention
Accordingly, an object of the present invention is to provide an electromagnetic heating device having advantages of simple structure, high water resistance, excellent sealing and insulating properties, and excellent heat dissipation effect.
An electromagnetic heating device comprises a heating coil, a heating control circuit component, a heat dissipation component and an insulation component;
the heating control circuit component is electrically connected with the heating coil and controls the closing and opening of the heating coil loop; the heating control circuit assembly comprises a loop box and a plurality of electronic elements arranged in the loop box;
the heat dissipation assembly comprises a heat transfer unit and a medium heat dissipation unit, and the heat transfer unit is detachably fixed with the electronic element and in heat transfer contact with the electronic element; a heat dissipation medium flows in the medium heat dissipation unit, and the heat dissipation medium is in heat transfer contact with the surface of the heat transfer unit;
the insulation assembly comprises a circuit insulation piece and a coil insulation piece, wherein the circuit insulation piece and the coil insulation piece are respectively arranged outside the electronic element and the heating coil and are respectively in heat transfer contact with the outer surfaces of the electronic element and the heating coil.
According to the electromagnetic heating device provided by the embodiment of the invention, the circuit insulating piece and the coil insulating piece are respectively arranged outside the electronic element and the heating coil so as to insulate and seal the electronic element and the heating coil, thereby realizing water resistance and avoiding the problem that external moisture or liquid medium to be heated enters an electric-involved area during use so as to cause electric shock danger; in addition, by arranging the heat transfer unit and the medium heat dissipation unit, the heat transfer unit is utilized to be detachably fixed with and in heat transfer contact with the electronic element, so that heat generated by the electronic element during operation is transferred, and the heat is further taken away from the heat transfer unit by combining the flow of the heat transfer medium in the medium heat dissipation unit, so that the purpose of heat dissipation is achieved, the heat dissipation of the electronic element can be effectively ensured while the heat dissipation performance of the electronic element is improved while the insulating sealing performance is improved, the long-term stability of the insulating sealing is effectively ensured, and the service life of the device is prolonged.
Further, the medium heat dissipation unit is of a liquid cooling structure and comprises a liquid storage tank, a cooling pipeline and a power device; the liquid storage tank is internally provided with a liquid medium, one end of the cooling pipeline is communicated with the liquid storage tank, and the power device is communicated with the cooling pipeline and drives the liquid medium to flow in the cooling pipeline; the wall of the cooling pipeline is in heat transfer contact with the surface of the heat transfer unit, heat generated by the electronic element sequentially passes through the heat transfer unit and the wall of the cooling pipeline to transfer heat, and the heat is further taken away by utilizing a liquid medium flowing in the cooling pipeline, so that the purpose of heat dissipation is achieved.
Further, the cooling pipeline penetrates through the loop box, and the heat transfer unit is sleeved outside the cooling pipeline and is positioned in the loop box. The heat transfer unit is sleeved outside the cooling pipeline, so that the heat transfer contact area can be increased, and the heat transfer efficiency can be improved.
Further, the electronic component comprises an IGBT and a rectifier bridge, and the IGBT and the rectifier bridge are detachably fixed with the heat transfer unit through fixing screws. Utilize the fixed screw to realize detachable fixed, fixed stability is good, and dismouting convenient operation.
Further, the heat transfer unit is a radiator with a multi-fin structure, and the radiator is made of one or more of aluminum, aluminum alloy, ceramics and quartz, the multi-fin structure can enlarge the heat transfer area, and the material with higher heat transfer coefficient is preferably used, so that the heat transfer rate is improved, and the heat dissipation is enhanced; the material of the cooling pipeline is one or more of plastics, metals and quartz, so that insulation and heat transfer can be realized at the same time.
Further, the medium heat dissipation unit is an air cooling structure and comprises a heat dissipation fan; the heat transfer unit comprises a fixed end and a radiating end which are fixedly connected, and the fixed end is arranged in the loop box and is detachably fixed with the electronic element; the heat dissipation end penetrates through and extends out of the loop box, and the heat dissipation fan is arranged towards the heat dissipation end. By means of the arrangement of the heat transfer unit, heat generated by the electronic element during operation can be transferred from the loop box, and further the heat is taken away by flowing air generated by the heat dissipation fan during operation, so that effective heat dissipation is achieved, and meanwhile electric shock risks cannot be caused.
Further, the electronic component comprises an IGBT and a rectifier bridge, wherein the IGBT and the rectifier bridge are detachably fixed with the fixed end of the heat transfer unit through a fixing clamp, the fixing stability is good, and the disassembly and the assembly are simple and convenient.
Further, the circuit insulating piece is made of two-liquid polyurethane resin, the two-liquid polyurethane resin is filled in the loop box, and the whole filling arrangement can effectively realize heat transfer contact between the cooling pipeline and the heat transfer unit and realize insulation; the coil insulator is two-liquid polyurethane resin, and is wrapped outside the heating coil, so that heat generated during the operation of the heating coil can be absorbed while insulation sealing is performed, and the effect of cooling is achieved to a certain extent, so that the operation time of the heating coil is prolonged.
Further, the insulating assembly further comprises a ceramic insulating sheet, and the ceramic insulating sheet is arranged between the electronic element and the heat transfer unit so as to insulate the electronic element from the heat transfer unit without affecting the heat transfer effect of the electronic element.
Further, polyimide insulating glue is further arranged between the ceramic insulating sheet and the electronic element, between the ceramic insulating sheet and the heat transfer unit, and heat conduction silicone grease is further coated between the polyimide insulating glue and the ceramic insulating sheet, between the ceramic insulating sheet and the electronic element, and between the polyimide insulating glue and the heat transfer unit, so that the insulating effect is further improved.
For a better understanding and implementation, the present invention is described in detail below with reference to the drawings.
Drawings
FIG. 1 is a schematic diagram of an electromagnetic heating device according to embodiment 1 of the present invention;
FIG. 2 is a schematic view showing a partial structure of an electromagnetic heating apparatus according to embodiment 1 of the present invention;
FIG. 3 is a schematic view of the heat transfer unit and the cooling pipeline according to embodiment 1 of the present invention;
fig. 4 is a schematic diagram showing a partial structure of an electromagnetic heating apparatus according to embodiment 2 of the present invention;
fig. 5 is a schematic diagram showing a partial structure of an electromagnetic heating apparatus according to embodiment 2 of the present invention.
Detailed Description
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Example 1
Referring to fig. 1-2, fig. 1 is a schematic diagram of the electromagnetic heating device according to embodiment 1 of the present invention, fig. 2 is a schematic diagram of a partial structure of the electromagnetic heating device according to embodiment 1 of the present invention, as shown in the drawings, embodiment 1 of the present invention provides an electromagnetic heating device, which can be applied to a product for heating a liquid or other media, such as a warm water tooth-rinsing device, i.e. a hot water tap, and includes a heating coil 1, a heating control circuit assembly 2, a heat dissipation assembly 3, and an insulation assembly 4;
the heating control circuit component 2 is electrically connected with the heating coil 1 and controls the closing and opening of a loop of the heating coil 1; the heating control circuit assembly 2 comprises a loop box 21 and a plurality of electronic elements arranged in the loop box 21;
the heat dissipation assembly 3 comprises a heat transfer unit 31 and a medium heat dissipation unit, wherein the heat transfer unit 31 is detachably fixed with the electronic component and in heat transfer contact with the electronic component; a heat dissipation medium flows in the medium heat dissipation unit, and is in heat transfer contact with the surface of the heat transfer unit 31;
the insulating assembly 4 includes a circuit insulator 41 and a coil insulator 42, and the circuit insulator 41 and the coil insulator 42 are respectively disposed outside the electronic component and the heating coil 1 and are respectively in heat transfer contact with the outer surfaces of the electronic component and the heating coil 1.
According to the electromagnetic heating device disclosed by the embodiment 1, the circuit insulator 41 and the coil insulator 42 are respectively arranged outside the electronic element and the heating coil 1 so as to insulate and seal the electronic element and the heating coil 1, so that the problem that external moisture or liquid medium to be heated enters an electric-related area during use to cause electric shock danger is avoided; in addition, by arranging the heat transfer unit 31 and the medium heat dissipation unit, the heat transfer unit 31 is utilized to detachably fix and transfer heat to contact with the electronic component, so that heat generated by the electronic component during operation is transferred, and the heat is further taken away from the heat transfer unit 31 by combining the flow of the heat transfer medium in the medium heat dissipation unit, so that the purpose of heat dissipation is achieved, the electronic component can be insulated and sealed, the waterproof performance is improved, the heat dissipation performance of the electronic component is not influenced, the long-term stability of the insulated and sealed electronic component is effectively ensured, and the service life of the device is prolonged.
Specifically, the heating coil 1 is used for heating a medium to be heated, such as water flowing through a pipeline when the heating coil 1 is applied to a warm water tooth washer or a hot water tap, the heating coil 1 is of a multi-layer coil structure formed by winding a plurality of strands of stranded wires, each strand of stranded wires is an enameled wire, functional insulation is provided between the wires, and the use voltage of the heating coil 1 is high (above dangerous voltage 42V) during normal operation, so that the heating coil 1 needs to be sealed and insulated when the heating coil is applied to an IPX7 waterproof type ii appliance, and meanwhile, the heating value of the heating coil 1 is large during normal operation, so that heat is required to be dissipated, and damage of insulating materials covered by the stranded wires is avoided, and electric shock danger is caused.
As an alternative implementation manner, in this embodiment, the medium heat dissipating unit is a liquid cooling structure, which includes a liquid storage tank 32, a cooling pipeline 33, and a power device, wherein a liquid medium is stored in the liquid storage tank 32, one end of the cooling pipeline 33 is communicated with the liquid storage tank 32, and the power device is communicated with the cooling pipeline 33 and drives the liquid medium to flow in the cooling pipeline 33; specifically, in the present embodiment, the power device includes a liquid pump 34 and a motor 35 drivingly connected to the liquid pump 34, and both an inlet and an outlet of the liquid pump 34 are in communication with the cooling pipe 33; the outer side surface of the cooling pipeline 33 is in heat transfer contact with the surface of the heat transfer unit 31, and the heat generated by the electronic component further transfers heat through the heat transfer unit 31 and the side wall of the cooling pipeline 33, and the heat is taken away by the liquid medium flowing in the cooling pipeline 33, so that the purpose of heat dissipation is achieved. When the electromagnetic heating device is applied to a product for heating liquid immediately, such as a warm water tooth washer or an instant heating tap, the liquid medium can be water, and the liquid storage tank 32 and the cooling pipeline 33 can be further designed to be overlapped with a heating water loop of the warm water tooth washer or the instant heating tap, as shown by an arrow direction in fig. 1, the design can fully utilize heat absorbed by the water when the water is used as the liquid medium for heat dissipation, so that the purpose of saving energy sources is achieved.
As an alternative implementation manner, please refer to fig. 3, fig. 3 is a schematic structural diagram of the heat transfer unit and the cooling pipe according to embodiment 1 of the present invention, as shown in the drawing, in this embodiment, the cooling pipe 33 is disposed through the loop box 21, and the heat transfer unit 31 is sleeved outside the cooling pipe 33 and is located in the loop box 21; the cooling water flows through the cooling pipe in the direction indicated by the arrow in fig. 3, and the heat transfer unit 31 is sleeved outside the cooling pipe 33, so that the heat transfer contact area can be increased, and the heat transfer efficiency can be improved.
The heat transfer unit 31 is a radiator with a multi-fin structure, and the material of the radiator is one or more of aluminum, aluminum alloy, ceramic and quartz, and the multi-fin structure can enlarge the heat transfer area, and preferably uses a material with a higher heat transfer coefficient, thereby being beneficial to improving the heat transfer rate and enhancing the heat dissipation; the material of the cooling pipe 33 is selected from one or more of plastics, metals and quartz, so that insulation and heat transfer can be realized at the same time, the cooling pipe 33 can be a straight pipe, an elbow pipe or an irregularly-shaped pipe, and the shape and the size of the cooling pipe depend on the heating value of the heating element IGBT 10 and the rectifying bridge 11 at the maximum power.
As an alternative embodiment, the circuit insulator 41 is a two-liquid polyurethane resin filled in the circuit box 21, and the whole filling arrangement can effectively realize heat transfer contact between the cooling pipe 33 and the heat transfer unit 31 and realize insulation; further, the loop box 21 should be made of a material with a fire rating V0 or more, the polyurethane resin should be poured into the loop box 21 when not solidified, and the distance between the liquid level of the polyurethane resin and the electronic component with the highest level should be 2mm or more, so as to ensure that all the electronic components are wrapped by the polyurethane resin, ensure the insulation effect, and the minimum distance between the heat transfer unit 31 and the outer surface of the pipe wall of the cooling pipe 33 should be 2.0mm or more, so as to facilitate filling insulation of the polyurethane resin. After the resin is coagulated, an insulation structure integrally filled in the loop box 21 is formed, preferably, the loop box 21 can be a transparent part, so that whether air bubbles remain after the polyurethane resin is filled to cause insufficient insulation distance can be checked, the coil insulation part 42 is made of two-liquid polyurethane resin, is wrapped outside the heating coil 1, can absorb heat generated by the heating coil 1 during operation while performing insulation sealing, and achieves the effect of reducing temperature to a certain extent so as to prolong the operation time of the heating coil 1.
Specifically, referring to fig. 2-3, as shown in the drawings, in the present embodiment, the electronic component includes the IGBT 22 and the rectifier bridge 23, and since the heat transfer unit and the electronic component are integrally embedded in the two-liquid polyurethane resin in the present embodiment, insulation can be effectively achieved, and thus the IGBT 22 and the rectifier bridge 23 can be detachably fixed to the heat transfer unit 31 by fixing screws (not shown). Utilize the fixed screw to realize detachable fixed, fixed stability is good, and dismouting convenient operation.
Further preferably, the insulating assembly 4 further comprises a ceramic insulating sheet (not shown) provided between the electronic component and the heat transfer unit 31 to achieve insulation between the electronic component and the heat transfer unit 31 without affecting the heat transfer effect thereof, preferably the ceramic insulating sheet should have a thickness of not less than 0.6mm to ensure the insulation effect.
Example 2
Referring to fig. 4-5, fig. 4 is a schematic diagram of a partial structure of an electromagnetic heating device according to embodiment 2 of the present invention, fig. 5 is a schematic diagram of a partial structure of an electromagnetic heating device according to embodiment 2 of the present invention, and as shown in the drawings, embodiment 2 of the present invention provides an electromagnetic heating device, which is different from embodiment 1 in that: the medium heat dissipation unit is an air cooling structure and comprises a heat dissipation fan 36; the heat transfer unit 31 includes a fixed end 311 and a heat dissipation end 312 which are fixedly connected, wherein the fixed end 311 is arranged in the loop box 21 and is detachably fixed with the electronic element; the heat dissipation end 312 extends out of the loop box 21, and the heat dissipation fan 36 is disposed towards the heat dissipation end 312. By means of the heat transfer unit 31, heat generated during operation of the electronic component can be transferred from the loop box 21, and further heat is taken away by flowing air generated during operation of the cooling fan 36, so that effective heat dissipation is achieved, and electric shock hazard is not caused.
Specifically, the electronic component includes the IGBT 22 and the rectifier bridge 23, in order to realize insulation between the electronic component and the heat transfer unit 31, the IGBT 22 and the rectifier bridge 23 are detachably fixed with the fixed end 311 of the heat transfer unit 31 through the fixing clip 5, the fixing stability is good, the disassembly and assembly operation is simple and convenient, the fixing clip 5 is an insulating material workpiece, the fire-proof level is above V0, and for the fixing screw of the conductive material, the fixing clip is used for clamping and fixing, so that effective insulation can be realized.
Further, in this embodiment, since the heat dissipation end 312 of the heat transfer unit 31 penetrates through the loop box 21, in order to enhance insulation and to achieve the requirement of double insulation in the waterproof type ii appliance, the polyimide insulating glue 44 is further disposed between the ceramic insulating sheet 43 and the electronic component, and between the ceramic insulating sheet 43 and the heat transfer unit 31, so as to further improve the insulation effect, and further, the heat conduction silicone grease (not shown) is further coated between the polyimide insulating glue 44 and the ceramic insulating sheet 43, and between the electronic component and the heat transfer unit 31, so that the heat transfer effect is better and more uniform.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.
Claims (10)
1. An electromagnetic heating device, characterized in that: the heating coil comprises a heating coil body, a heating control circuit assembly, a heat dissipation assembly and an insulation assembly;
the heating control circuit component is electrically connected with the heating coil and controls the closing and opening of the heating coil loop; the heating control circuit assembly comprises a loop box and a plurality of electronic elements arranged in the loop box;
the heat dissipation assembly comprises a heat transfer unit and a medium heat dissipation unit, and the heat transfer unit is detachably fixed with the electronic element and in heat transfer contact with the electronic element; a heat dissipation medium flows in the medium heat dissipation unit, and the heat dissipation medium is in heat transfer contact with the surface of the heat transfer unit;
the insulation assembly comprises a circuit insulation piece and a coil insulation piece, wherein the circuit insulation piece and the coil insulation piece are respectively arranged outside the electronic element and the heating coil and are respectively in heat transfer contact with the outer surfaces of the electronic element and the heating coil.
2. An electromagnetic heating device according to claim 1, characterized in that: the medium heat dissipation unit is of a liquid cooling structure and comprises a liquid storage tank, a cooling pipeline and a power device; the liquid storage tank is internally provided with a liquid medium, one end of the cooling pipeline is communicated with the liquid storage tank, and the power device is communicated with the cooling pipeline and drives the liquid medium to flow in the cooling pipeline; the pipe wall of the cooling pipe is in heat transfer contact with the surface of the heat transfer unit.
3. An electromagnetic heating device according to claim 2, characterized in that: the cooling pipeline penetrates through the loop box, and the heat transfer unit is sleeved outside the cooling pipeline and is positioned in the loop box.
4. An electromagnetic heating device according to claim 3, characterized in that: the electronic component comprises an IGBT and a rectifier bridge, and the IGBT and the rectifier bridge are detachably fixed with the heat transfer unit through fixing screws.
5. The electromagnetic heating device of claim 4, wherein: the heat transfer unit is a radiator with a multi-fin structure, and the radiator is made of one or more of aluminum, aluminum alloy, ceramic and quartz; the material of the cooling pipeline is selected from one or more of plastics, metals and quartz.
6. An electromagnetic heating device according to claim 1, characterized in that: the medium heat radiation unit is an air cooling structure and comprises a heat radiation fan; the heat transfer unit comprises a fixed end and a radiating end which are fixedly connected, and the fixed end is arranged in the loop box and is detachably fixed with the electronic element; the heat dissipation end penetrates through and extends out of the loop box, and the heat dissipation fan is arranged towards the heat dissipation end.
7. The electromagnetic heating device of claim 6, wherein: the electronic component comprises an IGBT and a rectifier bridge, wherein the IGBT and the rectifier bridge are detachably fixed with the fixed end of the heat transfer unit through a fixing clamp.
8. Electromagnetic heating device according to claim 2 or 6, characterized in that: the circuit insulator is two-liquid polyurethane resin, and is filled in the loop box; the coil insulator is made of two-liquid polyurethane resin, and is wrapped outside the heating coil.
9. The electromagnetic heating device of claim 8, wherein: the insulating assembly further includes a ceramic insulating sheet disposed between the electronic component and the heat transfer unit.
10. An electromagnetic heating device according to claim 9, wherein: polyimide insulating glue is further arranged between the ceramic insulating sheet and the electronic element, between the ceramic insulating sheet and the heat transfer unit, and heat conduction silicone grease is further coated between the polyimide insulating glue and the ceramic insulating sheet, between the polyimide insulating glue and the electronic element and between the polyimide insulating sheet and the heat transfer unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111232137.6A CN116017796A (en) | 2021-10-22 | 2021-10-22 | Electromagnetic heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111232137.6A CN116017796A (en) | 2021-10-22 | 2021-10-22 | Electromagnetic heating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116017796A true CN116017796A (en) | 2023-04-25 |
Family
ID=86025527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111232137.6A Pending CN116017796A (en) | 2021-10-22 | 2021-10-22 | Electromagnetic heating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116017796A (en) |
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2021
- 2021-10-22 CN CN202111232137.6A patent/CN116017796A/en active Pending
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