Heating module and electronic cigarette

Abstract

The embodiment of the utility model provides a heating module and an electronic cigarette, and belongs to the field of electronic cigarettes. The heating module comprises an electromagnetic coil; the temperature control assembly comprises a sheet-shaped heating body, and the sheet-shaped heating body generates heat under the action of an electromagnetic field generated by the electromagnetic coil; the insulating layer is printed on the surface of the sheet-shaped heating body; and the temperature control circuit is printed on the surface of the sheet-shaped heating body. According to the heating module provided by the embodiment of the utility model, the printed circuit area is large, and the circuit design is convenient; meanwhile, the effective heating area can be increased, and the temperature rising speed is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic cigarette heating, and in particular to a heating module and an electronic cigarette. Background Art

[0002] Current electronic cigarettes have heating circuits and temperature control circuits printed on the surface of ceramic heating needles, or have heating circuits and temperature control circuits placed inside ceramic heating needles, heating cigarettes through resistive heating. However, ceramic heating needles have poor strength and there is a risk of needle breakage during use. In addition, ceramic heating needles have a small diameter, insufficient effective heating area, and slow heating speed. Moreover, the outer surface of ceramic heating needles is small, which is not conducive to the design of heating circuits and temperature control circuits. Utility Model Content

[0003] The purpose of the embodiments of the utility model is to provide a heating module and an electronic cigarette, which can partially or completely solve the problems of small effective heating area, slow heating speed and difficult circuit design.

[0004] In order to achieve the above-mentioned purpose, an embodiment of the utility model provides a heating module, which includes: an electromagnetic coil; and a temperature control component, which includes: a sheet heating element, which generates heat under the action of the electromagnetic field generated by the electromagnetic coil; an insulating layer, which is printed on the surface of the sheet heating element; and a temperature control circuit, which is printed on the surface of the insulating layer.

[0005] Optionally, a through hole is provided on the sheet heating element and at a position away from the temperature control circuit.

[0006] Optionally, the minimum interval between the edge of the through hole and the edge of the sheet-like heating element is 1 / 5 to 2 / 5 times the width of the sheet-like heating element.

[0007] Optionally, the heating module further includes: a bracket, the bracket is provided with a cavity, the cavity is used to place the temperature control component, and the electromagnetic coil is fixed on the outer wall of the bracket.

[0008] Optionally, the electromagnetic coil is a disc coil.

[0009] Optionally, when the number of the disc coil is one, the disc coil is correspondingly wound around the sheet-like heating element.

[0010] Optionally, when there are multiple disc coils, the multiple disc coils are connected in series and are correspondingly wound around the sheet-like heating element.

[0011] Optionally, the surface of the temperature control circuit is also plated with a protective layer.

[0012] Optionally, one end of the sheet-like heating element is a pointed sheet.

[0013] On the other hand, the utility model also provides an electronic cigarette, comprising the heating module.

[0014] Through the above technical scheme, the heating module provided by the utility model includes: an electromagnetic coil; and a temperature control component, the temperature control component includes: a sheet heating element, the sheet heating element generates heat under the action of the electromagnetic field generated by the electromagnetic coil; an insulating layer, the insulating layer is printed on the surface of the sheet heating element; and a temperature control circuit, the temperature control circuit is printed on the surface of the sheet heating element. The embodiment of the utility model uses the sheet heating element as a substrate, prints an insulating layer on the sheet heating element and prints a circuit on the insulating layer, so that the printed circuit area is large, which is convenient for circuit design, and can also increase the effective heating area. The sheet heating element generates heat under the eddy current formed by the alternating magnetic field generated by the electromagnetic coil, so that the temperature rise speed of the sheet heating element is accelerated.

[0015] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the embodiments of the present utility model and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present utility model, but do not constitute a limitation on the embodiments of the present utility model. In the accompanying drawings:

[0017] Figure 1 It is a cross-sectional view of the overall structure of the heating module provided by the embodiment of the utility model;

[0018] Figure 2 It is a structural schematic diagram of a temperature control assembly provided by an embodiment of the utility model;

[0019] Figure 3 It is a schematic diagram of the structure of an electromagnetic coil wound on a bracket provided by an embodiment of the utility model;

[0020] Figure 4 This is a diagram of a spiral electromagnetic coil of the first FPC cable provided by the embodiment of the utility model;

[0021] Figure 5 This is a three-dimensional diagram of the first FPC cable after winding provided by the embodiment of the utility model;

[0022] Figure 6 This is a diagram of a spiral electromagnetic coil of a second FPC cable provided by an embodiment of the utility model;

[0023] Figure 7This is a three-dimensional diagram of the second FPC cable after winding provided by the embodiment of the utility model;

[0024] Figure 8 It is a schematic plan view of a disc coil of a first shape provided by an embodiment of the utility model;

[0025] Fig. 9 It is a plan view of a disc coil of a second shape provided by an embodiment of the utility model;

[0026] Fig.10 It is a schematic plan view of a disc coil of a third shape provided by an embodiment of the utility model;

[0027] Fig.11 It is a schematic plan view of a disc coil of a fourth shape provided by an embodiment of the utility model;

[0028] Fig.12 It is a three-dimensional diagram of a disc coil provided by an embodiment of the utility model.

[0029] Description of Reference Numerals

[0030] 1 Temperature control component 10 Sheet heating element

[0031] 11 Temperature control circuit 12 Through hole

[0032] 13 pads 20 bracket

[0033] 21 cavity 22 electromagnetic coil

[0034] 23FPC soft flat cable 24 soft metal substrate

[0035] 25 pads DETAILED DESCRIPTION

[0036] The specific implementation of the embodiment of the utility model is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the utility model, and is not used to limit the embodiment of the utility model.

[0037] Figure 1 The sectional view of the overall structure of the heating module provided by the embodiment of the utility model. The heating module comprises: an electromagnetic coil 22; and a temperature control component 1, wherein the temperature control component 1 comprises: a sheet heating element 10 (such as Figure 2 As shown in the figure), the sheet heating element 10 generates heat under the action of the electromagnetic field generated by the electromagnetic coil; an insulating layer (not shown in the figure), the insulating layer is printed on the surface of the sheet heating element; and a temperature control circuit 11, the temperature control circuit 11 is printed on the surface of the insulating layer 10.

[0038] For example, reference Figure 2 It is a schematic diagram of the structure of the temperature control component provided by an embodiment of the utility model. The sheet heating element 10 generates eddy currents in the alternating electromagnetic field generated by the electromagnetic coil, so that the sheet heating element 10 generates heat. The shape of the heating element is set to be sheet-like to increase the heating area of ​​the heating element. Exemplarily, the shape of the sheet heating element can be a rectangular, irregular or polygonal, circular sheet, etc. The utility model does not make specific restrictions, and all simple shape changes belong to the protection scope of the embodiment of the utility model. The thickness of the sheet heating element can be selected, for example, 0.5mm, 1mm and other sizes. While ensuring the strength of the sheet heating element, the corresponding thickness is selected according to actual needs.

[0039] An insulating layer is printed on one of the surfaces of the sheet heating element. The method of printing the insulating layer can adopt existing technical means, and the utility model does not make specific restrictions. A temperature control circuit 11 is further printed on the insulating layer. The insulating layer is printed between the sheet heating element and the temperature control circuit to avoid short circuit between the temperature control circuit 11 and the sheet heating element 10. The temperature control circuit 11 can accurately detect and control the temperature of the sheet heating element, so that the temperature of the sheet heating element is controlled at the required appropriate temperature.

[0040] The sheet heating element can be made of any magnetic metal material such as stainless steel, cold-rolled carbon steel, iron-nickel alloy or iron. This magnetic metal material combined with electromagnetic heating technology effectively solves the problems of easy damage of the heating needle, small contact area with the heated object, slow heating rate, low heating efficiency, difficult circuit manufacturing and high cost.

[0041] In the embodiment of the utility model, the heating element is set in a sheet shape to increase the effective heating area, and heat is generated under the eddy current formed by the alternating magnetic field generated by the electromagnetic coil, so that the sheet heating element heats up faster and has higher heating efficiency. The temperature control circuit is printed on the sheet heating element, so that the printed circuit area is large and the circuit design is convenient.

[0042] Furthermore, a through hole is provided on the sheet-like heating element and at a position avoiding the temperature control circuit.

[0043] For example, Figure 2 Two pads 13 are also printed on the sheet heating element 10, and the two pads are used to connect other control circuits. A through hole 12 is opened in the transition area between the temperature control circuit 11 and the welding 13 on the sheet heating element 10. The through hole 12 is opened on the sheet heating element 10 and avoids the position of the temperature control circuit 11, ensuring that the heat in the sheet heating element 10 area is reduced from diffusing to other areas without damaging the temperature control circuit 11, thereby further improving the heating efficiency of the heating sheet. The embodiment of the present invention does not impose any specific restrictions on the shape and number of the through holes 12 and the specific opening positions.

[0044] Opening through holes can not only reduce the spread of heat to other areas, but also save materials and reduce costs.

[0045] Furthermore, the minimum interval between the edge of the through hole and the edge of the sheet-like heating element is 1 / 5 to 2 / 5 times the width of the sheet-like heating element.

[0046] For example, in order to reduce the number of process steps, only one through hole 12 is provided in the embodiment of the utility model, and the minimum distance between the edge of the through hole 12 and the edge of the sheet heating element (i.e. Figure 1 The distance between the edge of the through hole 12 and the nearest edge of the sheet heating element is 1 / 5 to 2 / 5 times the width of the sheet heating element, and the strength of the structure is guaranteed as much as possible under the premise of reducing the heat diffusion from the heating area to other areas. For example, when the width of the sheet heating element is 1 cm, the minimum distance between the edge of the through hole and the edge of the sheet heating element is 0.2 cm-0.4 cm (it can also be adjusted according to actual conditions).

[0047] Furthermore, one end of the sheet-shaped heating element is in a pointed sheet shape.

[0048] For example, when the heating module in the embodiment of the present invention is applied to an electronic cigarette, in order to ensure that the contact area between the sheet heating element and the cigarette is ensured without damaging the cigarette structure, the sheet heating element can be set to a rectangular shape, and its side length is set to be less than or equal to the diameter of the cigarette. Furthermore, in order to facilitate the insertion of the sheet heating element into the cigarette, one end of the rectangular sheet heating element can be set to a pointed sheet (such as Figure 1 ), easy to use.

[0049] Further, Figure 2 The heating module further comprises a bracket 20 , the bracket 20 is provided with a cavity 21 , the cavity 21 is used to place the temperature control component 1 , and the electromagnetic coil 22 is fixed on the outer wall of the bracket 20 .

[0050] For example, in some embodiments, the heating module further includes a bracket 20, the bracket 20 is provided with a cavity 21, the temperature control component is placed in the cavity 21, and the electromagnetic coil 22 is fixed on the outer wall of the bracket 20. The electromagnetic coil 22 forms an alternating magnetic field in the cavity 21, so that the sheet heating element 10 generates eddy currents in the alternating magnetic field to generate heat. The sheet heating element 10 can be used to heat an object, for example, a cigarette.

[0051] Furthermore, the electromagnetic coil is a disc coil.

[0052] For example, in some embodiments, the electromagnetic coil 22 can be wound on the sheet heating element 10 in a spiral coil, for details, refer to Figure 3 , Figure 3 The electromagnetic coil 22 can also be wound on the bracket 20 with a planar multi-strand coil using an FPC flexible flat cable. For details, please refer to Figure 4 and Figure 6 , Figure 4 This is the first type of spiral electromagnetic coil wound with an FPC flexible flat cable provided by the embodiment of the utility model, that is, the FPC flexible flat cable 23 is directly wound outside the bracket 20, Figure 5 This is a three-dimensional structural diagram of the first type of spiral electromagnetic coil wound around the FPC soft cable. Figure 6 This is a structural diagram of a second type of wound spiral electromagnetic coil of an FPC flexible flat cable provided in an embodiment of the utility model. Multiple FPC flexible flat cables 23 can be welded in parallel on the welding pads 25 of the same soft metal substrate 24, and finally the welded soft metal substrate 24 is wound around the periphery of the bracket 20. Figure 7 It is a three-dimensional diagram of the second type of FPC flexible flat cable spiral coil wound with a soft metal substrate. The present invention does not impose any specific restrictions on the structure of the spiral electromagnetic coil.

[0053] The electromagnetic coil in the embodiment of the utility model is preferably a disc coil. Figure 8 , Fig. 9 , Fig.10 as well as Fig.11 The disc coils can be of different shapes (the disc coil in the figure is composed of 2 disc coils). The disc coils can be of any shape, including Figure 8 , Fig. 9 , Fig.10 , Fig.11 The diagram is a plan view of disk coils of different shapes. The electromagnetic coil is set as a disk coil to make the energy conversion in the electromagnetic induction process more efficient. Due to its unique shape and structure, the coil can more effectively concentrate and transfer energy when generating a magnetic field, reducing energy loss during the transmission process. In addition, the disk coil can produce a more uniform magnetic field distribution, which helps to achieve more accurate measurement and more efficient energy transmission. Due to the structural design of the disk coil, its heat dissipation performance is also relatively good. During the electromagnetic induction process, the heat generated by the coil can be dissipated in time to avoid affecting the performance and stability of the equipment due to overheating.

[0054] Further, when the number of the disc coil is one, the disc coil is correspondingly wound around the sheet-like heating element.

[0055] Specifically, Figure 8 , Fig. 9 , Fig.10 as well as Fig.11 The electromagnetic coil in the embodiment is a structure of two disc coils connected in series. In the embodiment of the present invention, the size and number of the disc coils can be selected according to the size of the bracket 20. When the size of the sheet heating body 10 and the bracket 20 is small, the disc coil can be set to one to save costs. When there is one disc coil, the disc coil is directly wound around the sheet heating body.

[0056] Further, when there are multiple disc coils, the multiple disc coils are connected in series and are correspondingly wound around the sheet-like heating element.

[0057] Specifically, when the sheet heating element 10 and the bracket 20 are relatively large in size, in order to improve the heating efficiency, a plurality of disc coils can be connected in series and then wound around the sheet heating element accordingly, such as Figure 8 , Fig. 9 , Fig.10 as well as Fig.11 It is two disc coils connected in series. Fig.12 A three-dimensional diagram of a disc coil.

[0058] The heating module also includes: a control device (not shown in the figure), which is connected to the electromagnetic coil and the temperature control circuit respectively.

[0059] For example, Figure 1 There are two pads 13 printed on the sheet heating element 10, and the pads 13 are connected to the temperature control circuit 11. Wires can be welded on the pads 13 of the temperature control circuit to lead the circuit to the control device (not shown in the figure). The control device uses the driving module and MOSFET to make the electromagnetic coil wound on the bracket resonate with the capacitor to form a changing magnetic field. The magnetic metal material generates induced electromotive force and induced current in the changing magnetic field to generate heat. At the same time, the temperature control circuit 11 on the magnetic metal material can accurately measure the temperature as feedback, and then accurately control the temperature.

[0060] Furthermore, the surface of the temperature control circuit is plated with a protective layer.

[0061] For example, in some embodiments, a protective layer may be plated on the surface of the temperature control circuit. For example, a glaze layer may be plated on the surface of the temperature control circuit 11 to protect the circuit and facilitate cleaning.

[0062] Through the above technical scheme, the heating module provided by the utility model includes: an electromagnetic coil; and a temperature control component, the temperature control component includes: a sheet heating element, the sheet heating element generates heat under the action of the electromagnetic field generated by the electromagnetic coil; an insulating layer, the insulating layer is printed on the surface of the sheet heating element; and a temperature control circuit, the temperature control circuit is printed on the surface of the sheet heating element. The embodiment of the utility model uses the sheet heating element as a substrate, prints an insulating layer on the sheet heating element and prints a circuit on the insulating layer, so that the printed circuit area is large, which is convenient for circuit design, and can also increase the effective heating area. The sheet heating element generates heat under the eddy current formed by the alternating magnetic field generated by the electromagnetic coil, so that the temperature rise speed of the sheet heating element is accelerated.

[0063] On the other hand, an embodiment of the present invention further provides an electronic cigarette, comprising the above-mentioned heating module.

[0064] The heating module in the embodiment of the utility model is particularly suitable for electronic cigarettes. The size of the sheet heating element can be designed according to the different sizes of cigarettes. The width of the sheet heating element is less than or equal to the diameter of the cigarette to prevent the cigarette from being damaged when inserted into the sheet heating element. The principle and effect of the electronic cigarette heating the cigarette are similar to those of the heating module in the above embodiment, and will not be repeated here.

[0065] The beneficial effects of the heating module and the electronic cigarette in the embodiment of the utility model compared with the prior art include: 1. The heating needle material of the existing scheme is ceramic, which has poor structural strength and is easy to break. The heating substrate of the utility model is a magnetic metal sheet, such as SUS430 (stainless steel SUS430), SPCE (cold-rolled carbon steel), iron-nickel alloy or stainless iron and other ferromagnetic materials. The magnetic metal substrate has high strength, good toughness, high structural strength, and is not prone to heating sheet damage.

[0066] 2. The heating needles in the prior art are needle-shaped, with a small contact area with tobacco and low heating efficiency. The heating sheet in the utility model is sheet-shaped, with a large contact area with tobacco and high heating efficiency.

[0067] 3. The surface of the heating needle in the prior art is an arc surface, and the printing technology of the temperature control circuit is complex and the defect rate is high. The surface of the sheet heating element in the utility model is flat, and the circuit is easy to print. The technology is simple and reliable, and the cost is low.

[0068] 4. The surface area of ​​the heating needle in the prior art is small and arc-shaped, and the design of the heating circuit and the temperature control circuit on it is difficult, and it is not easy to meet the design requirements. The printing area of ​​the temperature control circuit in the utility model is flat and large, which is convenient for circuit design. Because the area of ​​the heating plate is larger than the needle-shaped area, and it is flat and easy to make, it is convenient to print more complex circuits. Because the printing process is simple, the lines of the temperature control circuit can be made thinner, and the resistance value can be 8 to 30Ω at the initial 25 degrees. When the target temperature of heating is 300 to 400 degrees, the resistance value can reach 16 to 60Ω, which improves the accuracy of temperature control. The temperature control TCR can be above 3200ppm / ℃, which improves the temperature sensitivity. The material of the temperature control circuit can use silver-palladium alloy, platinum and other related materials whose resistance changes linearly with temperature changes. The prior art ceramic needle sintering, circuit printing or built-in heating temperature control are difficult to design and process, and the cost is high.

[0069] 5. The existing heating technology is resistance heating, which has a slow heating rate and is not conducive to the baking and smoke output speed of cigarettes. The utility model uses electromagnetic heating, which has a fast heating rate and can reach the target temperature within 3 seconds. It has high baking efficiency, fast smoke output speed, and better user experience.

[0070] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0071] The above are only embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A heating module, characterized in that: The heating module comprises: Solenoid coil; and A temperature control component, the temperature control component comprising: A sheet-shaped heating element, which generates heat under the action of the electromagnetic field generated by the electromagnetic coil; an insulating layer, the insulating layer being printed on the surface of the sheet heating element; and A temperature control circuit is printed on the surface of the insulating layer.

2. The heating module according to claim 1, characterized in that: A through hole is provided on the sheet heating element and at a position avoiding the temperature control circuit.

3. The heating module according to claim 2, characterized in that: The minimum interval between the edge of the through hole and the edge of the sheet heating element is 1 / 5 to 2 / 5 times the width of the sheet heating element.

4. The heating module according to claim 1, characterized in that: The heating module further comprises: a bracket, wherein the bracket is provided with a cavity, and the cavity is used to place the temperature control component. The electromagnetic coil is fixed on the outer wall of the bracket.

5. The heating module according to any one of claims 1 to 4, characterized in that: The electromagnetic coil is a disc coil.

6. The heating module according to claim 5, characterized in that: When the number of the disc coil is one, the disc coil is correspondingly wound around the sheet-like heating element.

7. The heating module according to claim 5, characterized in that: When there are multiple disc coils, the multiple disc coils are connected in series and are correspondingly wound around the sheet-shaped heating element.

8. The heating module according to claim 1, characterized in that: The surface of the temperature control circuit is also plated with a protective layer.

9. The heating module according to claim 1, characterized in that: One end of the sheet-shaped heating element is in a pointed sheet shape.

10. An electronic cigarette, characterized in that: A heating module comprising any one of claims 1 to 9.

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