CN216315581U - Heating assembly and aerosol generating device - Google Patents

Abstract

The utility model provides a heating component and an aerosol generating device, wherein the heating component comprises: the heating device comprises a heating body and a temperature sensing unit, wherein at least one accommodating channel extending along the length direction of the heating body approximately is arranged in the heating body, and the volume of a hollow part formed by the at least one accommodating channel is less than 25% of the volume of the heating body; the proportion of the volume of the accommodating channel to the volume of the heating needle is controlled, so that the heating uniformity of the heating body is effectively improved.

Description

Heating assembly and aerosol generating device

Technical Field

The application relates to the technical field of aerosol generation, in particular to a heating component and an aerosol generation device.

Background

When the aerosol generating device is used for generating aerosol, the temperature control is very important, the aerosol is not easy to generate due to low temperature, and the scorched smell of the aerosol can be generated due to high temperature. The basis of temperature control is temperature detection, and in order to accurately detect the temperature of a heating element of an aerosol generation device, a temperature sensor is generally provided inside the heating element. In order to install the temperature sensor, the channel for accommodating the temperature sensor is large, and the volume of the channel accounts for the volume of the heating body. In the production process, the inventor finds that the temperature of the heating pin is low at the part close to the root, the temperature of the part close to the tip is high, and the heating pin generates heat unevenly.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned problems, a primary object of the present application is to provide a heat generating component and an aerosol generating device.

The technical scheme adopted by the application is as follows:

a heat generating component comprising:

a heating element having a first end and a second end and extending between the first end and the second end, configured to heat an aerosol-forming substrate to generate an aerosol;

the heating element is internally provided with at least one accommodating channel which approximately extends along the length direction of the heating element, and the volume of a hollow part formed by the at least one accommodating channel is less than 25% of the volume of the heating element;

and the temperature sensing unit is accommodated in the accommodating channel.

Furthermore, the temperature sensing unit comprises a first thermocouple wire and a second thermocouple wire, and at least part of the first thermocouple wire and part of the second thermocouple wire are accommodated in the accommodating channel.

Further, the accommodating channel comprises a hole, and the first thermocouple wire and the second thermocouple wire are simultaneously arranged in the hole;

or the accommodating channel comprises two holes, and the first thermocouple wire and the second thermocouple wire are respectively arranged in one hole.

Further, when the accommodating channel comprises two holes, the diameter of the heating body is 2-2.6 mm, and the diameter of the hole is 0.5-0.7 mm

Further, the accommodating channel extends from the first end of the heating element to the second end and ends at a closed end, and the closed end is located between the first end and the second end.

Further, the extension length of the accommodating channel is 30% -80% of the extension length of the heating element.

Furthermore, the heating body comprises a first heating section and a second heating section which are fixedly connected.

Further, the first heating section is provided with a through hole along the length direction to form the accommodating channel.

Further, the first thermocouple wire and the second thermocouple wire each include a connection portion and an extension portion;

the connecting part is fixed close to the connecting position of the first heating section and the second heating section; the extension part is at least partially arranged in the accommodating channel.

Furthermore, a groove is formed in the end face, connected with the second heating section, of the first heating section, and the connecting portion is fixed in the groove.

Further, when the connecting part is fixed in the groove, the connecting part is lower than or flush with the end face where the groove is located.

Furthermore, the connecting device also comprises a filling body, wherein the filling body is filled in the groove fixed with the connecting part.

Further, the groove is communicated with the accommodating channel.

Further, the first and second heat-generating segments are configured to be traversed by a varying magnetic field to generate heat;

or the first and second heat-generating segments comprise a base and conductive traces formed on the base.

Further, the volume of a hollow part formed by at least one accommodating channel is within 20% of the volume of the heating element.

An aerosol-generating device comprising:

a housing assembly;

a chamber for receiving an aerosol-forming substrate;

the above-described heat generating component is positioned within the chamber for heating the aerosol-forming substrate.

To sum up, the beneficial effect of this application is:

the proportion of the volume of the accommodating channel to the volume of the heating needle is controlled, so that the heating uniformity of the heating body is effectively improved.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.

FIG. 1 is a schematic diagram of a heat generating component according to an embodiment;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is a cross-sectional view of yet another embodiment;

FIG. 4 is a schematic view of a heat-generating body of still another embodiment;

FIG. 5 is a schematic structural diagram of a heat generating component according to yet another embodiment;

FIG. 6 is a schematic structural diagram of a heat generating component according to yet another embodiment;

FIG. 7 is a schematic structural diagram of a heat generating component according to yet another embodiment;

FIG. 8 is a schematic view of a heat-generating body structure of still another embodiment;

FIG. 9 is a temperature profile for sample A;

FIG. 10 is a temperature chart of sample B;

figure 11 is a schematic structural view of an aerosol-generating device;

figure 12 is a schematic structural diagram of an aerosol-generating device according to yet another embodiment.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and it is therefore not intended to be limited to the embodiments disclosed below.

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.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

An aerosol-generating device comprises a housing assembly 10, a chamber 1001 and a heat generating component 30, the chamber 1001 being provided within the housing assembly 10, the heat generating component 30 being positioned within the chamber 1001 for heating an aerosol-forming substrate. The aerosol-generating device may also include a circuit board 20 and a controller (not shown). The circuit board 20 is connected to a controller. The aerosol-generating device may further comprise a battery assembly 50, said circuit board 20 and controller being electrically connected to said battery assembly 40.

As shown in fig. 1 to 3, the heat generating component 30 comprises a heat generating body 1 having a first end 105 and a second end 106 and extending between the first end 105 and the second end 106, the heat generating body 1 being configured to heat an aerosol-forming substrate to generate an aerosol, and a temperature sensing unit 2. At least one accommodating channel 4 extending approximately along the length direction of the heating element 1 is arranged in the heating element 1 (for example, the accommodating channel 4 may be inclined and extend along the length direction of the heating element 1), and the volume of a hollow part formed by at least one accommodating channel 4 is less than 25% of the volume of the heating element 1 (when the volume of the heating element 1 is calculated, the volume of the accommodating channel 4 is not subtracted); and the temperature sensing unit is accommodated in the accommodating channel.

The heat storage capacity of the heating body 1 made of the same material (the specific heat capacity is the same) is in direct proportion to the volume of the entity, the larger the accommodating channel 4 is, the smaller the entity volume of the heating body 1 is, and the worse the heat storage capacity is. In the aerosol generating device use process, cold air firstly passes through the one end (first end) of heat-generating body 1, then passes through the other end (second end) of heat-generating body 1, and cold air is at the in-process from the first end to the second end of heat-generating body 1, the heat of heat-generating body 1 can be continuously absorbed, because in the time of first end, the air is big with the first end difference in temperature of heat-generating body 1, the absorbed heat is many, and the air is in the time of second end, because the air has absorbed a large amount of heats at the in-process that flows, the air temperature is high, the heat that the air absorbed the second end is few. The air is at the in-process that flows, and it is different to absorb the heat of first end and second end, and current heating body is because the holding passageway is big, and the entity is small, and the energy storage is poor, and when the heat of first end loss was more than the second end, will lead to first end temperature to be low, and second end temperature is high, and 1 temperature of whole heat-generating body is inhomogeneous. And this application is because the volume of control holding passageway 4 accounts for within 1 volumetric 25% of heat-generating body, 1 entity of heat-generating body is bulky, has fine heat-retaining ability, and when the heat of first end loss was held more than the second, the temperature of first end did not have too big fluctuation to the temperature of first end and the temperature of second end are more close, and whole heating pin temperature is more even.

The temperature sensing unit 2 includes a first thermocouple wire 203 and a second thermocouple wire 204, and the first thermocouple wire 203 and the second thermocouple wire 204 are at least partially disposed in the accommodating passage.

The accommodating channel has at least two arrangements, which are only exemplified and not limited to these two arrangements.

First (fig. 1 and 2): the receiving channel 4 includes two holes, and the first thermocouple 203 and the second thermocouple wire 204 are respectively disposed in one hole. The length of the heating element 1 is 10 to 70mm (the tip 107 of the heating element 1 is substantially conical and 2mm in length), preferably the length of the heating element 1 is 10 to 25mm, the diameter of the heating element 1 is 2 to 2.6mm, and the diameter of the hole is 0.5 to 0.7 mm. Preferably, the length of the heating element 1 is 20mm, the diameter of the heating element 1 is 2.3mm, and the diameter of the hole is 0.55 mm.

Second (fig. 3): the receiving channel 4 comprises a hole, and the first thermocouple 203 and the second thermocouple wire 204 are simultaneously arranged in the hole.

The accommodating channel 4 extends from the first end 105 of the heating element to the second end 106 and ends at a closed end, and the closed end is located between the first end 105 and the second end 106. The extension length of the accommodating channel 4 is 30-80% of the extension length of the heating element. Preferably, the extension length of the accommodating passage is 50% to 70% of the extension length of the heating element. When the length of the heating element is 20mm, the diameter of the heating element 1 is 2mm, the accommodating channel 4 comprises two holes, the diameter of each hole is 0.7mm, and the depth of each hole is 14.4mm, the volume of the hollow part formed by the accommodating channel is 18.9% of the volume of the heating element. When the length of the heating element is 20mm, the diameter of the heating element 1 is 2.3mm, the accommodating channel 4 comprises two holes, the diameter of each hole is 0.55mm, and the depth of each hole is 12mm, the volume of the hollow part formed by the accommodating channel is 7.4% of the volume of the heating element. When the length of the heating body is 10mm, the diameter of the heating body 1 is 2.6mm, the accommodating channel 4 comprises two holes, the diameter of each hole is 0.5mm, and the depth of each hole is 3.4mm, the volume of the hollow part formed by the accommodating channel is 2.9% of the volume of the heating body.

Preferably, the volume of the hollow part formed by the accommodating passage is within 20% of the volume of the heating element.

The heating body 1 is divided into a first heating section 101 and a second heating section 102 in the longitudinal direction (see fig. 4).

The first heat-generating section 101 is provided with a through hole along the length direction to form the accommodating channel 4 (see fig. 2, 3 and 4). The first thermocouple wire 203 and the second thermocouple wire 204 each include a connecting portion 201 and an extending portion 202, and the extending portion 202 is at least partially disposed in the accommodating passage 4; the connection portion 201 is fixed adjacent to the connection position of the first and second heat generation sections 101 and 102. Specifically, the heating element 1 is provided with a groove 5, the extension part 202 is fixed in the groove 5, and the accommodating passage 4 is communicated with the groove 5. The grooves 5 are arranged in at least three ways, which are only given by way of example and are not limited to these three ways.

First (fig. 4): the groove 5 is disposed in the first heat generation section 101, and is located on an end surface where the first heat generation section 101 and the second heat generation section 102 are connected.

Second (fig. 3): the groove 5 is disposed in the second heat generation section 102 and located at an end surface where the second heat generation section 102 and the first heat generation section 101 are connected.

And the third is that: the first heating section 101 and the second heating section 102 are both provided with the groove 5, and the groove 5 is arranged on the end face where the first heating section 101 is connected with the second heating section 102.

The blind hole is opened to prior art all at heat-generating body 1 inside, then inserts temperature sensing unit 2 in the blind hole, and temperature sensing unit 2 and heat-generating body 1 are unset to lead to temperature sensing unit 2 and heat-generating body 1 contact unstable, measured temperature inaccuracy, and this application is with connecting portion 201 and heat-generating body 1 fixed connection, and the contact of temperature sensing unit 2 and heat-generating body 1 is reliable and stable, and measured temperature is more accurate.

When the connecting portion 201 is fixed in the groove 5, the connecting portion 20 is lower than or flush with the end surface of the groove 5, so that the first heating section 101 and the second heating section 102 are conveniently connected. When the connecting part 201 is fixed in the groove 5, there may be a gap in the groove 5, and at this time, the groove 5 is filled with the filler 3 (fig. 5), so as to avoid that the gap is in the groove 5 after the first heating section 101 and the second heating section 102 are connected, on one hand, the solid volume of the heating element 1 is affected, and thus the heat storage capacity of the heating element 1 is affected; on the other hand, the gap part is conducted by air, the heat transfer is slow, the filler 3 is filled in the gap, the heat conduction of the filler 3 is fast, and therefore the heating body 1 can generate heat more uniformly. The filler body 3 may be nickel welded in the recess 5.

The heat-generating body 1 is at least two kinds, which are exemplified herein, and is not limited to only these two kinds.

First (as in fig. 11): the heating element 1 is an electromagnetic heating element, namely the aerosol generating device also comprises an inductance coil L which is used for generating a variable magnetic field under alternating current; the heating element 1 is coupled to the inductance coil L, so that the first heating section 101 and the second heating section 102 generate heat when being penetrated by a changing magnetic field, and further the aerosol-forming substrate 40 is heated, and aerosol is generated. The inductor L may comprise a helically wound cylindrical inductor coil, as shown in fig. 11, depending on the arrangement in use of the product. The helically wound cylindrical inductor L may have a radius r in the range of about 5mm to about 10mm, and in particular the radius r may be about 7 mm. The number of turns of the inductor L is in the range of about 8 to 15 turns. The frequency of the alternating current supplied to the inductor L by the circuit 20 is between 80KHz and 400 KHz; more specifically, the frequency may be in the range of approximately 200KHz to 300 KHz. The battery assembly 50 provides a dc supply voltage in the range of about 2.5V to about 9.0V, and the battery assembly 50 can provide a dc current having an amperage in the range of about 2.5A to about 20A.

Second (fig. 7, 8 and 12): the heating element 1 is of a printed circuit type, that is, the first heating section 101 and the second heating section 102 include a base 103 and a printed circuit 104, and the printed circuit 104 is disposed on the base 103. The substrate 103 may be made of a conductor or a non-conductor (such as ceramic or glass), and if the substrate 103 is made of a conductor, an insulating layer is applied to the surface of the substrate 103 before the printed circuit 104 is printed, and then the printed circuit 104 is printed. For convenience of printing the printed circuit 104, the first heating section 101 and the second heating section 102 may be fixedly connected, and then the printed circuit 104 is printed.

The first heating section 101 and the second heating section 102 both generate heat, and compared with the case that only the first heating section 101 generates heat, the second heating section 102 does not generate heat, the connecting part 201 is fixed on the end face where the first heating section 101 and the second heating section 102 are connected, and the temperature detected by the temperature sensing unit 2 is more accurate.

As shown in fig. 6, the heating assembly further includes a base 6, the base 6 is disposed at an end of the first heating section 101 away from the second heating section 102, and the base 6 is convenient to fix the heating body 1 in the aerosol generating device.

The one end that first heat generation section 101 and second heat generation section 102 are close to each other has the chamfer when processing, first heat generation section 101 and second heat generation section 102 can leave the round spread groove (not drawn in the picture) after fixed connection, in order to avoid the spread groove to hide dirty dirt, can fill the spread groove with the nickel silk, keep heat-generating body 1 surface smooth.

In order to investigate the influence of the volume of the accommodating passage 4 on the heat generating body 1 in terms of the volume of the heat generating body 1, the inventors made a set of experiments. Sample a: the diameter of heat-generating body 1 is 2.3mm, and first heat-generating section 101 is long 12.3mm and solid, and second heat-generating section 102 is long 6mm, and two through-holes constitute holding passageway 4, and through-hole diameter 0.55mm, the volume of holding passageway 4 is 8.3% of heat-generating body 1 volume (when calculating the volume of heat-generating body 1, do not subtract the volume of holding passageway 4), and first heat-generating section 101 is close to the one end of second heat-generating section 102 is equipped with recess 5, and recess 5 width and degree of depth are 0.4mm, pass two through-holes respectively with first thermocouple wire 203 and the second thermocouple wire 204 of insulating layer are pulled out to both ends, then weld in recess 5, then weld first heat-generating section 101 and second heat-generating section 102. On the outer surface of the heating body 1, from the end of the second heating section 102 far from the first heating section 101, 5 thermocouples were welded at intervals of 2mm in the length direction (the first thermocouple was welded at a distance of 3mm from the end surface). Sample B: the sample B and the sample a were otherwise identical in arrangement, except that one through hole constituted the accommodating passage 4, and the diameter of the through hole was 1.6mm (the volume of the accommodating passage 4 occupied 35% of the volume of the heating element 1). Placing the sample A and the sample B in an alternating magnetic field, heating the sample A and the sample B, respectively recording the temperatures detected by 5 thermocouples of the sample A and the sample B, wherein the temperature recorded by the sample A is as shown in figure 9, and the temperature recorded by the sample B is as shown in figure 10, and as can be seen from figure 9, the lines recorded by the 5 thermocouples are very close to or even overlapped, the temperature difference of five detection points is within 10 ℃, and the heating element 1 is uniformly heated as a whole; as shown in fig. 10, the interval between lines for recording 5 thermocouples is large, the temperature difference detected by 5 thermocouples is about 40 ℃, and the temperature difference of each section of the heating element 1 is large. In conclusion, the volume of the accommodating channel 4 is controlled to be in proportion to the volume of the heating element 1, so that the heating uniformity of the heating element 1 can be effectively improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (16)

1. A heat generating component, comprising:

a heating element having a first end and a second end and extending between the first end and the second end, configured to heat an aerosol-forming substrate to generate an aerosol;

the heating element is internally provided with at least one accommodating channel which approximately extends along the length direction of the heating element, and the volume of a hollow part formed by the at least one accommodating channel is less than 25% of the volume of the heating element;

and the temperature sensing unit is accommodated in the accommodating channel.

2. The heating element of claim 1, wherein said temperature sensing unit comprises a first thermocouple wire and a second thermocouple wire, each of said first thermocouple wire and said second thermocouple wire being at least partially received in said receiving channel.

3. The heating element of claim 2 wherein said receiving channel includes an aperture, said first thermocouple wire and said second thermocouple wire being disposed in a single aperture;

or the accommodating channel comprises two holes, and the first thermocouple wire and the second thermocouple wire are respectively arranged in one hole.

4. The heating element as claimed in claim 3, wherein when the receiving passage includes two holes, the diameter of the heating element is 2 to 2.6mm, and the diameter of the hole is 0.5 to 0.7mm

5. The heating element as claimed in claim 1, wherein the receiving channel extends from the first end of the heating element substantially toward the second end and terminates in a closed end, the closed end being located between the first end and the second end.

6. The heating element as claimed in claim 5, wherein the extension length of the receiving passage is 30% to 80% of the extension length of the heating element.

7. The heat-generating assembly as claimed in claim 2, wherein the heat-generating body includes a first heat-generating section and a second heat-generating section which are fixedly connected.

8. The heat-generating component of claim 7, wherein the first heat-generating segment is provided with a through hole along a length direction thereof to form the receiving channel.

9. The heat-generating assembly of claim 8 wherein each of said first and second thermocouple wires includes a connecting portion and an extension portion;

the connecting part is fixed close to the connecting position of the first heating section and the second heating section; the extension part is at least partially arranged in the accommodating channel.

10. The heating element as claimed in claim 9, wherein a groove is formed on an end surface of the first heating section connected to the second heating section, and the connecting portion is fixed in the groove.

11. The heat-generating component of claim 10, wherein when the connecting portion is secured in the recess, the connecting portion is lower than or flush with the end surface of the recess.

12. The heat generating component of claim 11, further comprising a filler filled in the groove to which the connecting portion is fixed.

13. A heat-generating component as claimed in claim 10 or 12, wherein said recess communicates with said receiving channel.

14. The heat-generating assembly of claim 7, wherein the first and second heat-generating segments are configured to be traversed by a varying magnetic field to generate heat;

or the first and second heat-generating segments comprise a base and conductive traces formed on the base.

15. The heat-generating component as claimed in claim 1, wherein a volume of a hollow portion formed by at least one of said accommodating passages is within 20% of a volume of said heat-generating body.

16. An aerosol-generating device, comprising:

a housing assembly;

a chamber for receiving an aerosol-forming substrate;

a heat-generating component as claimed in any of claims 1 to 13, positioned within the chamber for heating an aerosol-forming substrate.

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