CN217791474U

CN217791474U - Heating element and aerosol-generating device

Info

Publication number: CN217791474U
Application number: CN202123184897.2U
Authority: CN
Inventors: 刘才学; 杨扬彬
Original assignee: Shenzhen Geekvape Technology Co Ltd
Current assignee: Shenzhen Geekvape Technology Co Ltd
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2022-11-15
Anticipated expiration: 2031-12-17

Abstract

The utility model relates to a heating element and aerosol generate device, heating element includes: a substrate having a first surface in a thickness direction. And the temperature measuring sheet is of a sheet structure and is attached to the first surface, and the temperature measuring sheet is used for detecting the temperature and is in split connection with the first surface. Therefore, on one hand, the temperature coefficient of resistance of the temperature measuring sheet after processing and forming can be ensured to be large enough and meet the design requirement. Under the great condition of resistance temperature coefficient, be convenient for carry out accurate detection and regulation and control with the temperature through the great change of resistance, and then improve heating element's control by temperature change precision. On the other hand, the density of the formed temperature measuring sheet is higher. Therefore, in the subsequent working process of the heating assembly, the actual resistance temperature coefficient of the temperature measuring sheet is ensured to be always equal to the calibrated resistance temperature coefficient, so that the accuracy of the temperature measured by the temperature measuring sheet is improved, and the temperature control accuracy of the heating assembly is finally improved.

Description

Heating element and aerosol-generating device

Technical Field

The utility model relates to an atomizing technical field especially relates to a heating element and contain this heating element's aerosol generation device.

Background

The aerosol generating device may be adapted to atomise a solid atomising substrate, in use the heating assembly being inserted into the atomising substrate and the atomising substrate absorbing heat generated by the heating assembly and atomising to form an aerosol for inhalation by a user. To traditional heating element, for the temperature to heating element monitors, heating element contains the temperature measurement circuit usually, however, this temperature measurement circuit is difficult to the accuracy usually and measures the temperature, leads to whole heating element's control by temperature change precision lower.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem be how to improve heating element's control by temperature change precision.

A heating assembly, comprising:

a substrate having a first surface in a thickness direction; and

the temperature measuring piece is of a sheet structure and is attached to the first surface, and the temperature measuring piece is used for detecting the temperature and is in split connection with the first surface.

In one embodiment, the thermometric strip is formed by electroforming.

In one embodiment, the temperature measuring sheet covers the whole first surface.

In one embodiment, the heating element further comprises a heating element, the substrate further has a second surface in the thickness direction, the second surface being opposite to the first surface, and the heating element is attached to the second surface.

In one embodiment, the heating device further comprises a first insulating sheet and a second insulating sheet, wherein the first insulating sheet is positioned on one side of the first surface and covers the temperature measuring sheet, and the second insulating sheet is positioned on one side of the second surface and covers the heating element.

In one embodiment, through holes are formed in the first insulating sheet and the second insulating sheet, and the through holes penetrate through the whole first insulating sheet or the second insulating sheet along the thickness direction.

In one embodiment, the temperature measuring device further comprises a first electrode and a second electrode, wherein the first electrode is positioned on one side of the first surface and is electrically connected with the temperature measuring sheet; the second electrode is located on one side where the second surface is located and is electrically connected with the heating element.

In one embodiment, the first electrode and the second electrode both comprise a mounting plate and a boss, the mounting plate is of a sheet structure, the mounting plate is provided with a mounting surface which is located in the thickness direction of the mounting plate and is arranged towards the substrate, the boss is connected with the mounting surface and protrudes relative to the mounting surface, and the boss is used for being electrically connected with the temperature measuring sheet or the heating element.

In one embodiment, the substrate comprises a bearing part and a spine part, the bearing part is provided with a fixed end and a connecting section which are oppositely arranged along the length direction, the fixed end is used for fixedly connecting the bearing part, the spine part is connected with the connecting end, and the cross section of the spine part is reduced from the fixed end to the connecting end.

An aerosol generating device, includes host computer and any one of the above-mentioned heating element, the host computer includes casing, power and control circuit board, the base plate with the casing is connected, control circuit board simultaneously with the power with temperature measuring chip electric connection.

The utility model discloses a technical effect of an embodiment is: the temperature measuring sheet is connected with the substrate in a split mode, so that the temperature measuring sheet can be independently formed without depending on the substrate, on one hand, the thickness and the width of each part of the temperature measuring sheet can be guaranteed to be uniform, namely, the thickness and the width of the temperature measuring sheet meet the designed tolerance requirements, and the temperature coefficient of resistance of the temperature measuring sheet after machining and forming is guaranteed to be large enough and meet the design requirements. Under the great condition of resistance temperature coefficient, be convenient for carry out accurate detection and regulation and control with the temperature through the great change of resistance, and then improve heating element's control by temperature change precision. On the other hand, the inner part of the formed temperature measuring sheet is closely arranged and uniformly distributed, so that the defect of gaps or holes caused by large space between molecules is effectively prevented, and the density of the temperature measuring sheet is improved. Therefore, in the subsequent working process of the heating assembly, the heated temperature measuring sheet has no phenomenon that the size of a gap or a hole is reduced due to expansion, and the actual resistance temperature coefficient of the temperature measuring sheet is ensured to be always equal to the calibrated resistance temperature coefficient, so that the accuracy of the temperature measured by the temperature measuring sheet is improved, and the temperature control accuracy of the heating assembly is finally improved.

Drawings

Fig. 1 is a schematic perspective view of a heating assembly according to an embodiment;

FIG. 2 is a schematic plan sectional view of a portion of the heating assembly of FIG. 1;

fig. 3 is an exploded view of the heating assembly shown in fig. 1.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "inner", "outer", "left", "right" and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Referring to figures 1, 2 and 3, an aerosol-generating device according to an embodiment of the present invention is provided for heating a solid aerosol substrate so that the aerosol substrate is atomised to form an aerosol for inhalation by a user. The aerosol generating device comprises a heating assembly 10 and a host, the host comprises a shell, a power supply and a control circuit board, the heating assembly 10 is connected with the shell, the shell is used for accommodating the power supply and the control circuit board, and the power supply is electrically connected with the heating assembly 10, so that the power supply can supply power to the heating assembly 10. The heating assembly 10 converts electrical energy into heat, which the atomizing substrate absorbs to atomize. The power supply can be a continuously rechargeable power supply, and when the electric quantity of the power supply is almost exhausted, the power supply can be charged through external power supply equipment, so that the power supply can be recycled again. The heating assembly 10 includes a substrate 100, a temperature-measuring sheet 200, a heating member, a first insulating sheet 310, a second insulating sheet 320, a first electrode 410, and a second electrode 420. The control circuit board is electrically connected to the power supply and the temperature measuring strip 200, and the temperature measuring strip 200 can feed back information to the control circuit board, so that the control circuit board controls the heating power of the heating assembly 10 by adjusting the output voltage or current of the power supply.

In some embodiments, the substrate 100 may have a sheet structure and be made of an insulating ceramic material, and the substrate 100 has stable physical and chemical properties, so that the liquid generated during the atomization process of the atomized matrix can be effectively prevented from reacting with the substrate 100 to generate harmful gas, thereby improving the health safety of the heating assembly 10. The substrate 100 has a first surface 110 and a second surface 120, and when the substrate 100 exists alone, the first surface 110 and the second surface 120 are two outer surfaces in a thickness direction of the substrate 100, and it is apparent that the first surface 110 and the second surface 120 are oppositely oriented.

In some embodiments, the substrate 100 includes a bearing portion 130 and a spine portion 140, the bearing portion 130 has a fixed end 131 and a connecting end 132, the fixed end 131 and the connecting end 132 are oppositely disposed along the length direction of the bearing portion 130, in short, the fixed end 131 and the connecting end 132 are two ends along the length direction of the bearing portion 130, and the fixed end 131 is used for fixing the bearing portion 130 to the power supply, so as to achieve a fixed connection between the heating assembly 10 and the power supply. The spike 140 is connected to the connecting end 132, and the cross-sectional dimension of the spike 140 decreases from the fixed end 131 to the connecting end 132, i.e. the width of the spike 140 decreases, so that the spike 140 has a tapered structure. By providing the spikes 140, the resistance of the aerosol generating device 10 to the aerosol generating device 10 may be reduced during insertion of the heating assembly 10 into the aerosol generating device, such that the heating assembly 10 may be quickly inserted into the aerosol generating device, thereby improving the convenience of use of the aerosol generating device as a whole. Meanwhile, because the resistance of the atomized matrix to the heating assembly 10 is reduced, the heating assembly 10 is prevented from being bent or even broken due to excessive resistance, and the service life of the heating assembly 10 is prolonged.

In some embodiments, the temperature measuring sheet 200 may be made of a metal material, and the temperature measuring sheet 200 has a relatively large resistance temperature coefficient, so that the temperature of the temperature measuring sheet 200 can be sensed by obtaining the resistance of the temperature measuring sheet 200, and therefore, the temperature of the whole heating assembly 10 can be measured by using the principle that the resistance value changes along with the temperature change, and the purpose of timely monitoring the temperature of the heating assembly 10 is achieved. The temperature measuring piece 200 is a sheet material and is attached to the first surface 110 of the substrate 100, the temperature measuring piece 200 is separately connected to the substrate 100, and specifically, the molded temperature measuring piece 200 is fixed on the first surface 110 of the substrate 100 on the premise that the substrate 100 and the temperature measuring piece 200 are respectively molded. The area of the temperature-measuring strip 200 may be equal to the area of the substrate 100, so that the temperature-measuring strip 200 can cover the entire first surface 110. In other embodiments, the area of the temperature measuring strip 200 may be smaller than the area of the substrate 100, so that the temperature measuring strip 200 does not completely cover the entire first surface 110, for example, the temperature measuring strip 200 may cover 80% of the first surface 110. The temperature measuring sheet 200 can be formed by adopting an electroforming process, and the temperature measuring sheet 200 is manufactured by the electroforming process, so that the dimensional accuracy of the thickness and the width of the temperature measuring sheet 200 is well ensured, the thickness and the width of the temperature measuring sheet 200 after forming are within the range allowed by the design tolerance, and the dimensional accuracy of the temperature measuring sheet 200 is improved. On the other hand, the arrangement of the molecules in the temperature measuring piece 200 is tight and the distribution is uniform, thereby effectively preventing the defects of gaps or holes caused by large space between the molecules and improving the density of the temperature measuring piece 200.

In some embodiments, the heating element is disposed on the second surface 120, for example, the heating element can be directly attached to the second surface 120, or a groove can be formed in the second surface 120 and the heating element can be engaged with the groove such that the heating element is embedded in the substrate 100. The heating element is made of metal material and has a certain resistance so as to convert electric energy into heat energy. The first insulating sheet 310 and the second insulating sheet 320 have substantially similar structures, that is, both are sheet-shaped structures, and the areas of the two can be substantially equal to the area of the substrate 100, the first insulating sheet 310 is located on the first surface 110 of the substrate 100, the first insulating sheet 310 can be directly attached to the temperature measuring sheet 200, that is, the substrate 100, the temperature measuring sheet 200 and the first insulating sheet 310 are in a stacked state, and the temperature measuring sheet 200 is stacked between the substrate 100 and the first insulating sheet 310, so that the first insulating sheet 310 covers the entire temperature measuring sheet 200 and plays an insulating protection role for the temperature measuring sheet 200, and the temperature measuring sheet 200 is prevented from being connected with other conductors to generate short circuit. The second insulating sheet 320 is located at a side where the second surface 120 of the substrate 100 is located, and the second insulating sheet 320 can be connected to the substrate 100 and the heating element, that is, the substrate 100, the heating element and the second insulating sheet 320 are in a stacked state, and the heating element is stacked between the substrate 100 and the second insulating sheet 320, so that the second insulating sheet 320 covers the entire heating element and provides insulation protection for the heating element, and prevents the heating element from being connected to other conductors to cause short circuit. Meanwhile, the first insulating sheet 310 is provided with a through hole 301, and the through hole 301 penetrates through the whole first insulating sheet 310 along the thickness direction; the second insulating sheet 320 may also have a through hole 301, and the through hole 301 penetrates the entire second insulating sheet 320 in the thickness direction.

In some embodiments, the first electrode 410 and the second electrode 420 are both made of metal or alloy material, and the first electrode 410 and the second electrode 420 have smaller electrical resistance, so that the two electrodes have excellent electrical conductivity and can prevent the two electrodes from generating larger heat loss. Both the first electrode 410 and the second electrode 420 include a mounting plate 401 and a boss 402, the mounting plate 401 is a sheet structure, and the area of the mounting plate 401 may be substantially equal to the area of the substrate 100. The mounting plate 401 has a mounting surface disposed toward the substrate 100, the boss 402 may have a substantially columnar structure, one end of the boss 402 is directly fixed to the mounting surface, and the other end of the boss 402 protrudes from the mounting surface in the thickness direction of the mounting plate 401 by a certain length, that is, the boss 402 is connected to the mounting plate 401 in a protruding manner.

The mounting plate 401 of the first electrode 410 is located at one side of the first surface 110, so that the temperature measuring sheet 200, the first insulating sheet 310 and the mounting plate 401 of the first electrode 410 are in a mutually overlapped state, that is, the first insulating sheet 310 is overlapped between the temperature measuring sheet 200 and the mounting plate 401 of the first electrode 410, and through the insulating action of the first insulating sheet 310, a short circuit between the first electrode 410 and the temperature measuring sheet 200 can be effectively prevented. The boss 402 of the first electrode 410 is disposed in the through hole 301 of the first insulating sheet 310 and electrically connected to the temperature measuring strip 200. The mounting plate 401 of the second electrode 420 is located at a side where the second surface 120 is located, so that the heating element, the second insulating sheet 320 and the mounting plate 401 of the second electrode 420 are in a mutually overlapped state, that is, the second insulating sheet 320 is overlapped between the heating element and the mounting plate 401 of the second electrode 420, and a short circuit between the second electrode 420 and the heating element can be effectively prevented by an insulating action of the second insulating sheet 320. The bosses 402 of the second electrode 420 are inserted into the through holes 301 of the second insulating sheet 320 and electrically connected to the heating element.

For the processing of the heat generating component, the substrate 100, the temperature measuring sheet 200, the heating member, the first insulating sheet 310, the second insulating sheet 320, the first electrode 410, and the second electrode 420 may be individually molded and then stacked in a corresponding stacking order to form a stacked body. In order to prevent relative displacement between the components in the stack, a certain amount of glue may be applied between two adjacent stacked parts to pre-fix the stack. Of course, the laminated body may be placed in a mold, and the laminated body may be retained by the mold, thereby preventing slippage between the respective components and improving the assembly accuracy of the laminated body. The laminate is then placed in a baking oven for sintering, so that the sintered laminate is finally converted into a finished heat-generating component.

If the temperature measuring strip 200 is fixed on the substrate 100 by printing, on one hand, due to inherent defects of the printing process, the thickness and width of each portion of the temperature measuring strip 200 are not uniform, that is, the thickness and width of the temperature measuring strip 200 are difficult to meet the tolerance requirement of the design, so the dimensional accuracy of the temperature measuring strip 200 after molding is relatively low, the number of the temperature measuring strips 200 with the resistance temperature coefficient meeting the design value after processing and molding is relatively low, and the resistance temperature coefficient of the temperature measuring strip 200 is relatively low. In fact, during the printing process, the temperature measuring piece 200 will always be formed by using the substrate 100 as a carrier, i.e. the temperature measuring piece 200 cannot be separated from the substrate 100 and is formed separately, which means that the temperature measuring piece 200 and the substrate 100 are integrally connected. Meanwhile, under the condition that the resistance temperature coefficient of the temperature measuring chip 200 is too small, when the temperature changes once, the resistance value of the temperature measuring chip 200 changes slightly, that is, the change of the temperature cannot be converted into a larger resistance change through a smaller resistance temperature coefficient, and the amplification factor of the resistance is smaller, so that the temperature is difficult to be accurately detected and regulated through a small change of the resistance. On the other hand, because a large amount of organic volatile substances exist in the temperature measuring sheet 200 after being printed and molded, in the sintering and molding process of the heating element, the organic volatile substances are heated and then converted into gas substances to be volatilized, so that hollow structures such as gaps or holes are formed at the original part filled with the organic volatile substances. In the use process of the heating assembly, the temperature measuring sheet 200 also absorbs the heat of the heating element to raise the temperature, and under the action of the heat of the heating element, the temperature measuring sheet 200 will expand to a certain extent, so that the size of the gap or hole in the temperature measuring sheet 200 is reduced. When the size of the hollow structure such as the gap or the hole is reduced, the temperature coefficient of resistance of the temperature measuring strip 200 will change, i.e. the actual temperature coefficient of resistance of the temperature measuring strip 200 will be different from the calibrated temperature coefficient of resistance. The value of the calibrated resistance temperature coefficient is a value measured before the temperature measuring piece 200 is heated, and in the measuring process, a user always obtains the real-time temperature of the heating component through the measured resistance value on the premise of referring to the calibrated resistance temperature coefficient. However, since the actual resistance temperature coefficient of the temperature measuring strip 200 will be different from the calibrated resistance temperature coefficient during the measurement process, the temperature of the heating element 10, which is sensed by continuously referring to the calibrated resistance temperature coefficient, will be distorted, that is, the temperature measuring strip 200 cannot accurately measure the temperature of the heating element 10, and finally cannot accurately control the temperature of the heating element 10, that is, cannot ensure the temperature accuracy of the heating element 10.

In the heating assembly 10 of the above embodiment, the temperature measuring piece 200 is formed separately from the substrate 100 by electroforming, that is, the temperature measuring piece 200 can be formed separately without using the substrate 100 as a carrier, so that the temperature measuring piece 200 and the substrate 100 can be connected and fixed by a separate connection. Therefore, on one hand, the thickness and the width of each part of the temperature measuring sheet 200 are uniform, namely, the thickness and the width of the temperature measuring sheet 200 meet the design tolerance requirement, and the temperature coefficient of resistance of the temperature measuring sheet 200 after processing and forming is ensured to be large enough and meet the design requirement. Under the great condition of resistance temperature coefficient, when every change once of temperature, the resistance value of temperature measurement piece 200 changes greatly, and the change of temperature can effectively turn into great resistance change through great resistance temperature coefficient promptly, so the magnification of resistance is great to be convenient for carry out accurate detection and regulation and control with the temperature of right through the great change of resistance, and then improve heating element 10's control by temperature change precision. On the other hand, the molecules in the formed temperature measuring piece 200 are arranged closely and uniformly, so that the defect of gaps or holes caused by large space between the molecules is effectively prevented, and the density of the temperature measuring piece 200 is improved. Therefore, in the subsequent operation of the heating assembly 10, the heated temperature measuring sheet 200 will not have the phenomenon that the size of the gap or hole is reduced due to expansion, and the actual resistance temperature coefficient of the temperature measuring sheet 200 is ensured to be always equal to the calibrated resistance temperature coefficient, so that the accuracy of the temperature measured by the temperature measuring sheet 200 is improved, and the temperature control accuracy of the heating assembly 10 is finally improved.

All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A heating assembly, comprising:

a substrate having a first surface in a thickness direction; and

the temperature measuring sheet is of a sheet structure, is attached to the first surface and is used for detecting temperature and is connected with the first surface in a split manner; the temperature measuring sheet is formed by adopting an electroforming process.

2. The heating assembly of claim 1, wherein the temperature sensing plate is made of a metal material.

3. The heating assembly of claim 1, wherein the temperature sensing strip covers all of the first surface.

4. A heating assembly as recited in claim 1, further comprising a heating element, said substrate further having a second surface in a thickness direction, said second surface being oppositely oriented from said first surface, said heating element being attached to said second surface.

5. The heating assembly of claim 4, further comprising a first insulating sheet positioned on the side where the first surface is located and covering the temperature sensing sheet, and a second insulating sheet positioned on the side where the second surface is located and covering the heating element.

6. The heating assembly of claim 5, wherein the first insulating sheet and the second insulating sheet each have a through hole formed therein, and the through hole penetrates the entire first insulating sheet or the second insulating sheet in a thickness direction.

7. The heating assembly of claim 4, further comprising a first electrode and a second electrode, wherein the first electrode is located on a side where the first surface is located and electrically connected to the thermometric strip; the second electrode is positioned on one side of the second surface and is electrically connected with the heating element.

8. The heating assembly of claim 7, wherein the first electrode and the second electrode both comprise a mounting plate and a boss, the mounting plate is a sheet structure having a mounting surface located in a thickness direction thereof and disposed toward the substrate, the boss is connected to the mounting surface and protrudes relative to the mounting surface, and the boss is used for electrical connection with the temperature measuring sheet or the heating element.

9. The heating assembly as claimed in claim 1, wherein the base plate includes a bearing portion and a spike portion, the bearing portion has a fixing end and a connecting portion opposite to each other along a length direction, the fixing end is used for fixedly connecting the bearing portion, the spike portion is connected to the connecting end, and a cross-sectional dimension of the spike portion decreases from the fixing end to the connecting end.

10. An aerosol-generating device comprising a heating assembly of any one of claims 1 to 9 and a host comprising a housing, a power supply and a control circuit board, the substrate being connected to the housing, the control circuit board being electrically connected to both the power supply and the temperature sensing strip.