CN212629868U - Induction heating device - Google Patents
Induction heating device Download PDFInfo
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- CN212629868U CN212629868U CN202021995754.2U CN202021995754U CN212629868U CN 212629868 U CN212629868 U CN 212629868U CN 202021995754 U CN202021995754 U CN 202021995754U CN 212629868 U CN212629868 U CN 212629868U
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Abstract
The utility model provides an induction heating device, which comprises a device shell, a power supply and a control unit, wherein the device shell comprises a cavity for containing at least one part of aerosol generating substances, a heating base body arranged in the cavity, and an inductor capable of generating a magnetic field axis; a control unit connected to the inductor and configured to provide a high frequency alternating current to the inductor; the inductor is a high electrical conductivity metal sheet arranged to form at least one layer of windings around at least a portion of the outer surface of the cavity. The utility model discloses the effective cross-section of inductor is bigger, and electromagnetic conversion efficiency is better to through printing temperature measurement circuit on the base member that generates heat, it is more accurate convenient to the temperature detection of the base member that generates heat, and its preparation technology is ripe simple, and the uniformity is good, has solved among the prior art at the defect that heating member surface butt-joint thermocouple wire possessed.
Description
Technical Field
The utility model relates to a low temperature cigarette technical field, in particular to induction heating device.
Background
As shown in fig. 14, in the low temperature fume currently on the market, the induction heating device for heating the aerosol generating substance overcomes some problems of the ceramic heating substrate, such as better uniformity of the temperature field and better forming consistency of the heating substrate, compared with the heating device using ceramic as the heating substrate. However, since the induction heating device generates an alternating magnetic field by supplying high-frequency alternating current to the induction coil through the power supply and the control unit, so that the metal susceptor generates heat energy by induction, the winding process of the conventional induction coil is complex, and the consistency of the heating effect of the wound coil is difficult to control. And the volume of the wound coil is large, which affects the popularization and application of the heating appliance.
The aerial fog of uniformity is produced to heat energy for accurate control experience heating member generates, need monitor the temperature on heating member surface at any time, the mode of current monitoring temperature is mostly realized heating member surface temperature monitoring at heating member surface butt-joint thermocouple line, the big or small uniformity of solder joint, the difficult control of drawing force uniformity of solder joint during butt-joint to surface bonding wire brings the difficulty for the sealed of whole heating module in the middle of the heating member, influences the uniformity and the cost of device.
Therefore, it is desirable to provide an induction heating device to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
To the technical problem in the related art, the utility model provides an induction heating device, through the sheetmetal around insulating tube surface around several circles formation inductor, this inductor compares ordinary coil, the coiling process is simple, the uniformity of heating effect after the easy control coiling, its effective cross-section is bigger, therefore the electromagnetic conversion efficiency is better, and the structure space can effectively be saved to the structure of encircleing, has solved the defect that uses induction coil to possess among the prior art; the temperature measuring circuit is printed on the heating substrate, and the lead connected with the temperature measuring circuit is arranged to be communicated with the control unit, so that TCR temperature control is realized, temperature detection on the heating substrate is more accurate and convenient, the manufacturing process is mature and simple, the consistency is excellent, and the defect that a thermocouple wire is butt-welded on the surface of a heating body in the prior art is overcome.
In order to solve the technical problem, the technical scheme of the utility model provides:
an induction heating device for aerosol generation, the device comprising:
a device housing comprising a cavity for containing at least a portion of an aerosol-generating substance, and a heat generating substrate disposed within the cavity, and further comprising an inductor having an axis capable of generating a magnetic field;
a power supply and control unit connected to the inductor and configured to provide a high frequency alternating current to the inductor; the method is characterized in that: the inductor is a high electrical conductivity metal sheet arranged to form at least one layer of wrapping around at least a portion of the outer surface of the cavity.
Furthermore, the cavity is an insulating tube, an insulating layer is printed on the surface of the metal sheet, the metal sheet is tightly wound around the outer surface of the insulating tube to form at least one layer, the layers are insulated, and the wound layers are not electrified and have upper and lower end faces flush with each other.
Furthermore, the metal sheet is made of copper or silver, and the cross section of the metal sheet is rectangular.
Furthermore, the heating substrate is made of an object which has good magnetic permeability and contains iron, and a temperature measuring circuit for measuring temperature is printed on the heating substrate.
Further, the heating substrate is in a shape of a sheet or a hollow needle, and the heating substrate is in contact with the aerosol generating substance.
Further, the heating base body is tubular, and the aerosol generating substance is placed in the heating base body.
Furthermore, an insulating layer and a protective layer are sequentially arranged on the outer surface of the heating base body from inside to outside, and the temperature measuring circuit is printed between the insulating layer and the protective layer.
Furthermore, the temperature measuring circuit is made of conductive paste with high resistance temperature coefficient, and the temperature measuring circuit is positioned in the middle section of the heating base body.
Furthermore, the innermost circle and the outermost circle of the inductor are respectively provided with a pin, the two pins are respectively positioned at two ends of the metal sheet, the pins and the metal sheet are integrated, and the pins are connected with the power supply and the control unit.
Furthermore, the temperature measuring circuit is connected with two lead wires, and the lead wires penetrate out of the cavity and are connected with the control unit.
The utility model discloses compare in prior art, its beneficial effect is: the metal sheet surrounds the outer surface of the insulating tube for a plurality of circles to form the inductor, compared with a common coil, the inductor has the advantages that the winding process is simple, the consistency of the heating effect after winding is easily controlled, the effective section of the inductor is larger, the electromagnetic conversion efficiency is better, the surrounding structure can effectively save the structural space, and the defects of the induction coil used in the prior art are overcome; the temperature measuring circuit is printed on the heating substrate, and the lead connected with the temperature measuring circuit is arranged to be communicated with the control unit, so that TCR temperature control is realized, temperature detection on the heating substrate is more accurate and convenient, the manufacturing process is mature and simple, the consistency is excellent, and the defect that a thermocouple wire is butt-welded on the surface of a heating body in the prior art is overcome.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments are briefly introduced below, and the drawings in the following description are only corresponding drawings of some embodiments of the present invention.
Fig. 1 is an overall schematic view of an induction heating apparatus according to an embodiment of the present invention.
Fig. 2 is an exploded view of an induction heating apparatus according to an embodiment of the present invention.
Fig. 3 is a front view of an inductor according to an embodiment of the present invention.
Fig. 4 is a cross-sectional view of an inductor according to an embodiment of the present invention.
Fig. 5 is a top view of an inductor according to an embodiment of the present invention.
Fig. 6 is an expanded view of a metal sheet according to an embodiment of the present invention.
Fig. 7 is a schematic diagram of an inductor heating according to an embodiment of the present invention.
Fig. 8 is a schematic view of a surface lamination of a heat-generating substrate according to an embodiment of the present invention.
Fig. 9 is a schematic view of a tubular heat-generating base according to an embodiment of the present invention.
Fig. 10 is a schematic view of a sheet-like heat-generating substrate according to an embodiment of the present invention.
Fig. 11 is a schematic view of a hollow needle-shaped heat-generating base according to an embodiment of the present invention.
Fig. 12 is a schematic diagram of a temperature measuring circuit according to an embodiment of the present invention.
Fig. 13 is a block diagram of an overall control circuit according to an embodiment of the present invention.
Fig. 14 is a schematic diagram of the background art according to the present invention.
In FIGS. 1-11: the temperature measuring device comprises a cavity 1, a heating base body 2, a temperature measuring circuit 3, a lead 4, an inductor 5, a pin 6, an insulating layer 201, a protective layer 202, a metal sheet 501 and an eddy current 502;
in fig. 14: heating base 141, induction coil 142, thermocouple wire 143.
Detailed Description
The induction heating device aims to solve the problems that an induction coil of the induction heating device in the prior art is low in energy conversion efficiency, difficult to wind the coil and poor in consistency of heating effect after winding; and the surface temperature monitoring of the heating body is realized by butt-welding thermocouple wires on the surface of the heating body, the size consistency of welding spots and the drawing force consistency of the welding spots are difficult to control during butt-welding, and the welding wires on the middle surface of the heating body bring difficulty to the sealing of the whole heating module, thereby influencing the consistency and the cost of the device. The utility model aims at providing an induction heating device, its core thought is: the metal sheet surrounds the outer surface of the insulating tube for a plurality of circles to form the inductor, compared with a common coil, the inductor has the advantages that the winding process is simple, the consistency of the heating effect after winding is easily controlled, the effective section of the inductor is larger, the electromagnetic conversion efficiency is better, the surrounding structure can effectively save the structural space, and the defects of the induction coil used in the prior art are overcome; the temperature measuring circuit is printed on the heating substrate, and the lead connected with the temperature measuring circuit is arranged to be communicated with the control unit, so that TCR temperature control is realized, temperature detection on the heating substrate is more accurate and convenient, the manufacturing process is mature and simple, the consistency is excellent, and the defect that a thermocouple wire is butt-welded on the surface of a heating body in the prior art is overcome.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly or indirectly secured to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positions based on the orientations or positions shown in the drawings, and are for convenience of description only and not to be construed as limiting the technical solution. The terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, according to the embodiment of the present invention, an induction heating device is used in a low-temperature electronic cigarette to heat an aerosol generating substance, so as to generate an aerosol, and specifically, the induction heating device includes a device housing, a power supply and a control unit.
The device housing comprises a cavity 1 for containing at least a portion of an aerosol-generating substance, and a heat generating substrate 2 disposed within the cavity 1, and further comprises an inductor 5 having an axis capable of generating a magnetic field;
the control unit is connected to the inductor 5 and is configured to provide a high frequency alternating current to the inductor 5; the inductor 5 is a metal sheet 501 with high electrical conductivity, and the metal sheet 501 is arranged to form at least one layer of winding around at least a part of the outer surface of the cavity 1.
Specifically, in the preferred embodiment, when the cavity 1 contains the aerosol generating substance, the heating substrate 2 generates heat to make the aerosol generating substance contacting with the heating substrate emit smoke for the user to suck, and on the basis, the heating substrate 2 is further printed with the temperature measuring circuit 3, and the real-time temperature of the heating substrate 2 can be obtained through the temperature measuring circuit 3 to realize the TCR temperature control; the outer surface of the cavity 1 is provided with an inductor 5, and the inductor 5 is formed by winding a metal sheet 501 with high electric conductivity around the outer surface of the cavity 1 for at least one circle. When the inductor 5 is powered on, the control unit provides high-frequency alternating current to the inductor 5, so that the inductor 5 generates magnetic field eddy current, and the heating of the heating base body 2 is influenced.
Referring to fig. 2, in the preferred embodiment, the chamber 1 is a tubular insulator, the tubular inner space of the chamber is used for containing aerosol-generating substances, the upper end of the chamber is open, and the bottom end of the chamber is provided with a vent hole 101 for airflow to pass through. The innermost circle and the outermost circle of the inductor 5 are respectively provided with a pin 6 which are respectively used as a positive electrode and a negative electrode to be connected with the control unit and the power supply, the power supply is used for supplying power, and the control unit controls high-frequency current to the inductor 5 to generate a magnetic field, so that the heating substrate 2 heats. The temperature measuring circuit 3 is positioned at the middle section of the heating base body 2, the temperature measuring circuit 3 is connected with two leads 4, the leads 4 penetrate out of the cavity 1, and the two leads 4 are communicated with the control unit to play a role in signal transmission so as to realize TCR temperature control. The material of the lead 4 may be nickel, copper or other conductive material as required. The temperature detection of the heating base body 2 is more accurate and convenient through the printed temperature measuring circuit 3 and the lead-out wire 4, and the manufacturing process is mature and simple and has excellent consistency.
As shown in fig. 3-6, in the preferred embodiment, the inductor 5 is formed by winding the metal sheet 501 at least two turns (preferably four turns), and the pins 6 respectively disposed at the innermost turn and the outermost turn of the inductor 5 are respectively distributed at two ends of the metal sheet 501, and in the preferred embodiment, the metal sheet 501 and the pins 6 are a single piece. Compared with a common coil, the winding process of the inductor 5 is simple, and the consistency of the heating effect after winding is good.
In the preferred embodiment, the surface of the metal sheet 501 is printed with an insulating material, the cavity 1 is an insulating tube, after the inductor 5 is wound around the outer surface of the insulating tube for several turns, the turns are tightly wound, and the upper end surface and the lower end surface of the wound turns are flush. The design mode is completely different from the traditional spiral type ascending winding, the effective section is larger, and the structural space is saved.
In the preferred embodiment, the metal sheet 501 printed with insulating material has high temperature resistance, high dielectric constant, low loss, and is tightly attached to each layer from the inside to the outside after being surrounded, but not electrified.
In the preferred embodiment, the inductor 5 is made of a metal material with high conductivity, and may be an oxygen-free copper, silver or other metal or non-metal high-quality conductor, which is originally a sheet, and the thickness may be 0.05mm to 0.5mm, the length and width may be cut by a cutting die according to actual needs, the ratio of the length to the width of the sheet unwound before winding is greater than 5, the cross section is rectangular, and the area of the sheet is greater than 1.5 square millimeters.
Accordingly, in the preferred embodiment, the metal sheet 501 is in an unfolded state before the inductor 5 is wound, the thickness of the metal sheet 501 is 0.05mm to 0.5mm, the length-to-width ratio of the metal sheet 501 is greater than 5, and the area of the cross section of the metal sheet 501 is greater than 1.5 square millimeters.
Accordingly, in the preferred embodiment, the metal sheet 501 is made of oxygen-free copper, silver, or other metal or non-metal high-quality conductor.
As shown in fig. 7, in the preferred embodiment, after the inductor 5 is switched on with the high-frequency ac power, a magnetic field is generated, so that the heat generating substrate 2 located in the middle of the inductor is affected by the eddy 502 generated thereby to generate heat, thereby achieving the purpose of heating the aerosol generating substance. It should be noted that the inductor 5 of the present embodiment has a larger effective cross section than a conventional coil, so that the electromagnetic conversion efficiency is higher, and the surrounding structure can effectively save the structural space.
As shown in fig. 8, in the preferred embodiment, an insulating layer 201 and a protective layer 202 are sequentially disposed on the outer surface of the heating substrate 2 from inside to outside, and the temperature measuring circuit 3 is printed between the insulating layer 201 and the protective layer 202 for detecting the temperature of the surface of the heating substrate 2 at any time.
In the preferred embodiment, the material of the temperature measuring circuit 3 can be any conductive paste with high TCR (temperature coefficient of resistance), the shape of the temperature measuring circuit 3 can be any shape, the temperature measuring circuit 3 is positioned in the middle section of the heating substrate 2, and the resistance value at normal temperature is between 0.5 and 50 ohms.
In the preferred embodiment, the heat generating base body 2 is made of an object with good magnetic permeability and containing iron, and the material of the object can be stainless steel 430 and 1010 steel or other alloy materials such as iron, nickel and titanium which can meet the requirement; and a layer of insulating paint is plated to wrap the heating base body 2 before the temperature measuring circuit 3 is printed, and the insulating layer 201 is arranged to ensure that the surface of the heating base body 2 is not conductive.
As shown in fig. 9, in the preferred embodiment, the heat generating base body 2 is tubular, and the aerosol-generating substance is placed in the tubular heat generating base body 2. The tubular heating base body 2 has an outer diameter of 5mm to 10mm, an inner diameter of 4.9mm to 9.9mm, a tube wall thickness of 0.05mm to 0.4mm, and a length of 10mm to 40 mm. The temperature measuring circuit 3 is printed in the middle of the heating base body 2, and the leads 4 of the temperature measuring circuit 3 are arranged on two sides of the heating base body 2 and extend out from two sides of the heating base body 2 to a certain length for connecting with the control unit after penetrating out of the cavity 1.
In another preferred embodiment, as shown in fig. 10, the heat generating substrate 2 is a sheet, the sheet-shaped heat generating substrate 2 is in contact with the aerosol-generating substance, and the aerosol-generating substance is placed in the cavity 1. The upper end of the sheet-shaped heating base body 2 is tapered, the length is 10mm to 40mm, the width is 3.0mm to 5.5mm, and the thickness is 0.2mm to 1 mm. The temperature measuring circuit 3 is printed in the middle of the heating base body 2, and a lead 4 of the temperature measuring circuit 3 is arranged on one side of the front of the heating base body 2, extends out of the tail end of the heating base body 2 by a certain length and is used for being connected with the control unit after penetrating out of the cavity 1.
In a further preferred embodiment, as shown in fig. 11, the heat generating base body 2 is in the shape of a hollow needle, the hollow needle-shaped heat generating base body 2 is in contact with the aerosol-generating substance, and the aerosol-generating substance is placed in the cavity 1. The hollow needle-shaped heating base body 2 has an outer diameter of 1.5mm to 2.5mm, an inner diameter of 0.5mm to 2mm and a length of 10mm to 25 mm. The temperature measuring circuit 3 is printed in the middle of the heating base body 2, and the leads 4 of the temperature measuring circuit 3 are arranged on two sides of the heating base body 2 and extend out from two sides of the heating base body 2 to a certain length for connecting with the control unit after penetrating out of the cavity 1.
The heating base bodies 2 in the three shapes can ensure that a larger area is contacted with the aerosol generating substance to better heat the aerosol, and the conical and needle-shaped heating base bodies 2 can play a role of being easier to insert the aerosol generating substance.
Fig. 12 is a schematic diagram of the temperature measuring circuit 3 in this embodiment, in which the resistor R is a heating equivalent resistor, and the resistor R, the inductor L, and the capacitor C are connected in parallel to the AC power supply AC.
As shown in fig. 13, it is a block diagram of an overall control circuit of the induction heating apparatus in this embodiment, in which a driving circuit, an inductor, a heating substrate, a temperature measuring circuit, and a control circuit are connected in sequence to jointly implement TCR temperature control. Preferably, the driving circuit and the control circuit are disposed on a control unit, the control unit is connected to a power supply, the power supply and the control unit are all in the prior art and are not shown in the drawings, and those skilled in the art can set the control circuit according to specific situations.
The specific during operation, the power supply, control unit provide high frequency alternating current for inductor 5, make inductor 5 produce magnetic field vortex 502, because the base member 2 that generates heat sets up in the surrounding range of inductor 5, so can receive the influence of vortex 502 and generate heat to play the function with the aerial fog generating substance heating that the base member 2 that generates heat contacted, thereby aerial fog generating substance produces aerial fog because being heated to a certain extent and supplies the user to inhale. In the work, because the lead wire 4 of the temperature measuring circuit 3 is connected with the control unit, the temperature information of the heating matrix 2 measured by the lead wire can be transmitted to the control unit, so that the control unit can realize TCR temperature control.
To sum up, the utility model forms the inductor by winding the metal sheet around the outer surface of the insulating tube for a plurality of circles, compared with the common coil, the inductor has simple winding process, easy control of the consistency of the heating effect after winding, larger effective section, better electromagnetic conversion efficiency, and the surrounding structure can effectively save the structural space, thus solving the defects of the induction coil used in the prior art; the temperature measuring circuit is printed on the heating substrate, and the lead connected with the temperature measuring circuit is arranged to be communicated with the control unit, so that TCR temperature control is realized, temperature detection on the heating substrate is more accurate and convenient, the manufacturing process is mature and simple, the consistency is excellent, and the defect that a thermocouple wire is butt-welded on the surface of a heating body in the prior art is overcome.
In summary, although the present invention has been disclosed with reference to the preferred embodiments, the above-mentioned preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so that the scope of the present invention shall be defined by the appended claims.
Claims (10)
1. An induction heating device for generating an aerosol, the device comprising:
a device housing comprising a cavity (1) for containing at least a portion of an aerosol-generating substance, and a heat generating substrate (2) arranged within the cavity (1), further comprising an inductor (5) having an axis capable of generating a magnetic field;
a power supply and control unit connected to the inductor (5) and configured to supply a high frequency alternating current to the inductor (5); the method is characterized in that: the inductor (5) is a metal sheet (501) with high electrical conductivity, and the metal sheet (501) is arranged to form at least one layer of winding around at least a part of the outer surface of the cavity (1).
2. The induction heating device as claimed in claim 1, wherein the cavity (1) is an insulating tube, the surface of the metal sheet (501) is printed with an insulating layer, the metal sheet (501) is tightly wound around the outer surface of the insulating tube into at least one layer, the layers are insulated from each other, and the wound layers are not electrified and have flush upper and lower end surfaces.
3. An induction heating unit as claimed in claim 1 or 2, characterized in that the metal sheet (501) is made of copper or silver, and the cross-section of the metal sheet (501) is rectangular.
4. An induction heating device as claimed in claim 1, characterized in that the heat-generating base body (2) is made of a magnetic and ferrous object, and a temperature measuring circuit (3) for measuring temperature is printed on the heat-generating base body (2).
5. An induction heating device as claimed in claim 4, characterized in that the heat-generating base body (2) is in the shape of a sheet or a hollow needle, which is in contact with the aerosol-generating substance.
6. An induction heating device as claimed in claim 4, characterized in that the heat-generating base body (2) is tubular in shape, in which the aerosol-generating substance is placed.
7. An induction heating device as claimed in claim 4 or 5, characterized in that an insulating layer (201) and a protective layer (202) are arranged on the outer surface of the heat-generating base body (2) in sequence from inside to outside, and the temperature measuring circuit (3) is printed between the insulating layer (201) and the protective layer (202).
8. An induction heating device as claimed in claim 4 or 5, characterized in that the temperature measuring circuit (3) is made of an electrically conductive paste with a high temperature coefficient of resistance, and the temperature measuring circuit (3) is located in the middle section of the heat generating base body (2).
9. An induction heating unit as claimed in claim 2, characterized in that the inductor (5) is provided with one pin (6) at the innermost and outermost turns, respectively, and that two pins (6) are located at the two ends of the metal sheet (501), respectively, and that the pins (6) are integral with the metal sheet (501), and are connected to a power supply and control unit.
10. An induction heating device as claimed in claim 4, characterized in that the temperature measuring circuit (3) is connected with two lead wires (4), and the lead wires (4) are connected with the control unit by passing through the cavity (1) to the outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021995754.2U CN212629868U (en) | 2020-09-11 | 2020-09-11 | Induction heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021995754.2U CN212629868U (en) | 2020-09-11 | 2020-09-11 | Induction heating device |
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| Publication Number | Publication Date |
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| CN212629868U true CN212629868U (en) | 2021-03-02 |
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| CN202021995754.2U Active CN212629868U (en) | 2020-09-11 | 2020-09-11 | Induction heating device |
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| CN (1) | CN212629868U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023138450A1 (en) * | 2022-01-24 | 2023-07-27 | 深圳市合元科技有限公司 | Aerosol generating apparatus and heater for aerosol generating apparatus |
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2020
- 2020-09-11 CN CN202021995754.2U patent/CN212629868U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023138450A1 (en) * | 2022-01-24 | 2023-07-27 | 深圳市合元科技有限公司 | Aerosol generating apparatus and heater for aerosol generating apparatus |
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Assignee: Shenzhen shengchuangda Biotechnology Co.,Ltd. Assignor: HUIZHOU KIMREE TECHNOLOGY Co.,Ltd. Contract record no.: X2022980005550 Denomination of utility model: An induction heating device Granted publication date: 20210302 License type: Common License Record date: 20220520 |