CN217722701U - Infrared heating element and aerosol generating device - Google Patents

Abstract

The application discloses an infrared heating body and an aerosol generating device, wherein the infrared heating body comprises an infrared ceramic body and a heating element embedded in the infrared ceramic body; the heating element is used for generating heat, and the infrared ceramic body is used for receiving the heat generated by the heating element and radiating infrared rays outwards. The infrared ceramic body and the heating element are of an integrated structure, the bonding firmness is good, the infrared ceramic body is not easy to fall off, break and the like, the infrared ceramic body can enhance the heat radiation capacity of the heating element, the heat energy utilization rate is improved, the uniformity of a heating element temperature field is improved, and the taste consistency of aerosol generated by heating aerosol generating substrates can be enhanced; compared with the mode that the infrared coating is formed on the heating resistor by adopting a thick film printing process in the prior art so as to improve the heat energy utilization rate, the influence of the problems of falling off, breakage and the like of the infrared coating on the thermal field stability of the heating element is avoided, and the improvement of the thermal field stability of the infrared heating element is facilitated.

Description

Infrared heating element and aerosol generating device

Technical Field

The application relates to the technical field of atomizers, in particular to an infrared heating body and an aerosol generating device applied to a low-temperature non-combustible electronic atomizer.

Background

At present, a heating non-combustion (HNB) type electronic atomizer comprises an inner core type heating mode and an outer periphery type heating mode, and due to the fact that the outer shell temperature of the outer periphery type heating scheme is high, the experience feeling is poor, and an inner core type heating atomization system is a hotspot of HNB research.

The existing inner core type heating non-combustion electronic atomizer generally carries out contact type direct heating on an aerosol generating substrate in a rod type or a sheet type through a resistance element in a heat conduction mode, and the scheme has the problems of uneven heating, large heat energy loss and low utilization rate; in addition, the infrared coating is coated on the heating resistor, and the coating absorbs heat after the heating resistor is electrified and emits infrared rays outwards to radiate and heat the aerosol generating substrate, so that the heat utilization rate is improved, but the problems that the infrared coating is easy to fall off, the heating film layer is easy to break and the like exist, the thermal field of the heating body is unstable, the product consistency and the stability are poor, and the user experience is degraded.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem to be solved by the application lies in overcoming the defects that the infrared coating is easy to fall off and the stability of a thermal field of a heating body is influenced in a heating mode of coating the infrared coating outside the heating resistor in the prior art, thereby providing the infrared heating body and the aerosol generating device.

In order to solve the technical problem, the technical scheme of the application is as follows:

an infrared heating body comprises an infrared ceramic body and a heating element embedded in the infrared ceramic body; the heating element is used for generating heat; the infrared ceramic body is used for receiving heat generated by the heating element and radiating infrared rays outwards.

Furthermore, the heating element is U-shaped and comprises two long heating strips extending in the same direction and a transverse heating strip connected between the two long heating strips; a U-shaped cavity matched with the heating element in shape is formed inside the infrared ceramic body; one end of the long heating strip extends outwards from the opening of the U-shaped cavity, and the transverse heating strip is completely arranged in the U-shaped cavity.

Further, the cross-sectional area of one end, close to the transverse heating bar, of the long heating bar is smaller than that of one end, far away from the transverse heating bar, of the long heating bar.

Furthermore, the long heating strip comprises a first heating section, a second heating section and a third heating section which are sequentially arranged from near to far from the transverse heating strip, and the cross sectional areas of the first heating section, the second heating section and the third heating section are sequentially increased.

Further, a transition heating section is formed between the narrow side of the first heating section and the narrow side of the second heating section.

Furthermore, the cross sections of the two long heating strips are rectangular, the opposite surfaces of the two long heating strips are narrow side surfaces of the long heating strips, and the side surfaces of the long heating strips, which are adjacent to the narrow side surfaces, are wide side surfaces; the distance between the narrow sides of the two adjacent first heating sections is greater than the distance between the narrow sides of the two adjacent second heating sections, and the distance between the narrow sides of the two adjacent second heating sections is greater than the distance between the narrow sides of the two adjacent third heating sections.

Furthermore, one end of each of the two long heating strips extending out of the U-shaped cavity is connected with a conductive connector, and the two conductive connectors are respectively used for being electrically connected with the positive electrode and the negative electrode of the power supply.

Furthermore, the infrared heating body also comprises a base, wherein a mounting cavity is arranged on the base, and one end of the infrared ceramic body, which is provided with the opening of the U-shaped cavity, extends into the mounting cavity and is fixed on the base; and the bottom of the mounting cavity is provided with a through hole for the conductive connector to pass through.

Further, the base is a zirconia ceramic base.

Furthermore, the heating element is an electric heating body, and the resistance value range of the electric heating body is 0.5-3 omega; or, the heating element is an electromagnetic inductor.

Further, the heating element may have any one of a sheet shape, a filament shape, and a tube-rod shape.

Embodiments of the present application also provide an aerosol-generating device, including a housing having a heating chamber and the infrared heating element as described above disposed in the heating chamber.

The technical scheme of the application has the following advantages:

1. the infrared heating body comprises a heating element and the heating element embedded in an infrared ceramic body, wherein the infrared ceramic body is wrapped outside the heating element in an injection molding mode, the injection molded infrared ceramic body and the heating element are of an integrated structure, the bonding firmness is good, the infrared ceramic body is not prone to falling, breaking and the like, the infrared ceramic body can enhance the heat radiation capacity of the heating element, the heat energy utilization rate is improved, meanwhile, the uniformity of a heating element temperature field is improved, and the taste consistency of aerosol generated by heating aerosol generating matrix can be enhanced; compared with the mode that the infrared coating is formed on the heating resistor by adopting a thick film printing process in the prior art so as to improve the heat energy utilization rate, the influence of the problems of falling off, breakage and the like of the infrared coating on the thermal field stability of the heating element is avoided, and the improvement of the thermal field stability of the infrared heating element is facilitated.

2. According to the infrared heating body provided by the application, the heating element is U-shaped, so that the uniformity of a temperature field formed by radiating infrared rays outwards from each position of the infrared ceramic body is improved; and the horizontal heating strip of the heating element is completely arranged in the U-shaped cavity in the infrared ceramic body, so that the heating element and the infrared heating body are better combined, and the heating element and the infrared heating body are more difficult to fall off.

3. The application provides an infrared heat-generating body, because violently generate heat the strip generate heat and be greater than the influence of the temperature field of violently generating heat strip one end to long generating heat strip being close to, it is littleer to be close to the cross-sectional area design of violently generating heat strip one end with long generating heat strip, and corresponding long generating heat strip is close to the area of generating heat of violently generating heat strip one end also littleer, is favorable to improving the homogeneity that forms the heating field on the infrared ceramic body cylinder.

4. According to the infrared heating body, one face, opposite to the long heating strips, of each long heating strip is a narrow side face, and the side face adjacent to the narrow side face is a wide side face; so set up, be favorable to improving infrared heating element and form the homogeneity that generates heat the field.

5. According to the infrared heating body, the long heating strips are composed of multiple stages, and the cross sectional areas of the long heating strips at all stages are changed step by step, so that the uniformity of a heating field formed by the infrared heating body is further improved; in addition, the bonding firmness of the heating element and the infrared ceramic body can be improved.

6. The application provides an infrared heat-generating body, the transition section of generating heat can realize the even transition of the narrow side second section of generating heat of first section of generating heat, so also is favorable to forming the even transition in temperature field separately.

7. The application provides an infrared heating body, the part that the infrared ceramic body was equipped with the U die cavity is cylindrically, and the open-ended one end that the U die cavity was kept away from to the infrared ceramic body is the toper, and the infrared ceramic body of being convenient for inserts in the aerosol generates the matrix, and the increase aerosol generates the area of contact of matrix and infrared ceramic body, improves the aerosol and generates the homogeneity of being heated of matrix in infrared ceramic body toper tip position department.

8. The infrared heating body has the advantages that the resistance value range of the electric heating body is 0.5-3 omega, the infrared emissivity can reach 0.86 at a wave band of 3-5 mu m at normal temperature by matching with the infrared ceramic body, uniform heating of aerosol generating substrates is facilitated, and the taste consistency of the formed aerosol is improved.

9. The application provides an infrared heat-generating body, the base adopts the zirconia ceramic material that the heat conductivity is low to make, can prevent that the heat from passing through the base and outwards conducting, reduces aerosol generating device's shell temperature.

Drawings

In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic perspective view of an infrared heating element provided in the present application;

FIG. 2 is an exploded view of an infrared heating element provided in the present application;

fig. 3 is a schematic perspective view of a heating element provided in the present application;

FIG. 4 is a cross-sectional view of an infrared ceramic body provided herein;

fig. 5 is a schematic perspective view of a base provided in the present application.

Description of reference numerals: 1. a heating element; 11. long heating strips; 11a, narrow sides; 11b, broad side; 111. A first heat generation section; 112. a second heat generation section; 113. a third heat generation section; 114. a transitional heating section; 12. Transverse heating strips; 2. an infrared ceramic body; 21. a U-shaped cavity; 3. a conductive connector; 4. a base; 41. and (7) installing a cavity.

Detailed Description

The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and operate, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Examples

An infrared heating body as shown in fig. 1-5 comprises a heating element 1, an infrared ceramic body 2, a base 4 and a conductive connecting body 3. The heating element 1 is embedded inside the infrared ceramic body 2, for example, the infrared ceramic body 2 is wrapped outside the heating element 1 by an injection molding process; the heating element 1 is for generating heat, and the infrared ceramic body 2 is for receiving the heat generated from the heating element 1 and radiating infrared rays to the outside. The infrared heating element is formed after degreasing and high-temperature sintering and then assembled with the base 4 to form an integrated far infrared needle type heating element; the conductive connector 3 penetrates out of the base 4 and is welded to form a contact, and the contact is conducted with the electrode of the circuit board in a contact mode, so that the operation is flexible and simple. Wherein, the heating element 1 is an electric heating body, and the resistance value range of the electric heating body is 0.5-3 omega; the base 4 is embodied as a zirconia ceramic base 4.

According to the infrared heating body, the infrared ceramic body 2 is wrapped outside the heating element 1 by adopting an injection molding process, so that the infrared ceramic body 2 and the heating element 1 form an integrated structure, the bonding firmness is good, and the infrared ceramic body 2 is not easy to fall off, break and the like; the infrared ceramic body 2 can enhance the heat radiation capability of the heating element 1, improve the heat energy utilization rate, is beneficial to improving the uniformity of the temperature field of the heating element 1, and can enhance the taste consistency of aerosol generated by heating aerosol generating substrates; compared with the mode that the infrared coating is formed on the heating resistor by adopting a thick film printing process in the prior art so as to improve the heat energy utilization rate, the influence of the problems of falling off, breakage and the like of the infrared coating on the thermal field stability of the heating element is avoided, and the improvement of the thermal field stability of the infrared heating element is facilitated.

The infrared ceramic body 2 is middle and far infrared ceramic composite powder H1, and the middle and far infrared ceramic composite powder H1 is prepared from the following components in parts by weight: 30-60 parts of middle and far infrared high-emissivity spinel powder, 20-50 parts of cordierite powder and 0-20 parts of soda-lime glass powder. For example, 60 parts of medium-far infrared high-emissivity spinel powder, 20 parts of cordierite powder and 20 parts of soda-lime glass powder, wherein the weight ratio of spherical materials to water is 3:1:0.5, placing the mixture in a planetary ball mill, carrying out ball milling at the speed of 350 r/min for 15H, drying the mixture, and sieving the dried mixture with a 100-mesh sieve to obtain mixed powder. The medium-far infrared spinel powder with high radiance is prepared by the following steps: mixing MnO2, cuO, co2O3 and Sb2O3 powder according to the weight ratio of 6:2.5:1:0.5, ball milling speed of 350 r/m and ball milling time of 10H, uniformly mixing, placing the mixture into a muffle furnace, heating to 850 ℃ and calcining for 2H to obtain the middle-far infrared high-emissivity spinel powder. After the infrared ceramic is optimized by a formula, the maximum infrared emissivity of the infrared ceramic can reach 0.86 at normal temperature in a wave band of 3-5 mu m. Mixing the prepared middle and far infrared ceramic composite powder H1 and an injection additive according to the weight ratio of 88:12 weight percent, mixing for 4H at 180-200 ℃, cooling and crushing to prepare the feed for injection molding. Wherein, the injection additive comprises the following components in percentage by weight: 60 parts of 58# paraffin, 20 parts of PE, 15 parts of PP and 5 parts of stearic acid. And (3) performing injection molding on the feed material in a mold to integrate the infrared ceramic and the heating element 1. And dewaxing, binder removal and sintering at 1050 ℃, keeping the temperature for 2H, and naturally cooling along with the furnace. And after testing the resistance OK, fixing the resistance OK and the zirconia ceramic base 4 by adopting high-temperature resistant AB glue, leading out the conductive connector 3 along the hole, and performing spot welding on a contact to obtain the integrated needle type heating body.

In some embodiments, the heating element 1 is U-shaped, and the U-shaped heating element 1 is beneficial to improve the uniformity of the temperature field formed by the infrared rays radiated outwards from all positions of the infrared ceramic body 2. Specifically, the heating element 1 includes two long heating strips 11 extending in the same direction and a transverse heating strip 12 connected between the two long heating strips 11; a U-shaped cavity 21 matched with the shape of the heating element 1 is formed inside the infrared ceramic body 2; one end of the long heating strip 11 extends outwards from the opening of the U-shaped cavity 21, and the transverse heating strip 12 of the heating element 1 is completely arranged in the U-shaped cavity 21 inside the infrared ceramic body 2, so that the heating element 1 and the infrared ceramic body 2 are better in combination, and the heating element 1 and the infrared ceramic body 2 are less prone to falling off.

In some embodiments, the cross-sectional area of the end of the long heat bar 11 near the transverse heat bar 12 is smaller than the cross-sectional area of the end of the long heat bar 11 away from the transverse heat bar 12. Because the influence of the heating of the transverse heating bar 12 on the temperature field of the long heating bar 11 close to one end of the transverse heating bar 12 is greater than the influence of the heating of the long heating bar 11 far away from the temperature field of one end of the transverse heating bar 12, the cross section area of the long heating bar 11 close to one end of the transverse heating bar 12 is designed to be smaller, the heating area of the corresponding long heating bar 11 close to one end of the transverse heating bar 12 is smaller, and the improvement of the uniformity of the heating field formed on the cylindrical surface of the infrared ceramic body 2 is facilitated. The cross sections of the two long heating strips 11 are rectangular, one surface of the two long heating strips 11 opposite to each other is a narrow side surface 11a of the long heating strip 11, and the side surface of the long heating strip 11 adjacent to the narrow side surface 11a is a wide side surface 11b. So set up, also be favorable to improving the infrared heating element and form the homogeneity that generates heat the field.

In some embodiments, the long heat-generating strip 11 includes a first heat-generating section 111, a second heat-generating section 112, and a third heat-generating section 113 arranged in sequence from the proximal side to the distal side of the transverse heat-generating strip 12, the distance between the narrow side surfaces 11a of two adjacent first heat-generating sections 111 is greater than the distance between the narrow side surfaces 11a of two adjacent second heat-generating sections 112, and the distance between the narrow side surfaces 11a of two adjacent second heat-generating sections 112 is greater than the distance between the narrow side surfaces 11a of two adjacent third heat-generating sections 113. The long heating strips 11 are composed of multiple stages, and the distance between every two stages of long heating strips 11 is changed step by step, so that the uniformity of a heating field formed by the infrared heater is further improved; in addition, the bonding firmness of the heating element 1 and the infrared ceramic body 2 can be improved.

In some embodiments, a transition heat generation section 114 is formed between the narrow side 11a of the first heat generation section 111 and the narrow side 11a of the second heat generation section 112. The transition heating section 114 can realize uniform transition of the narrow side 11a of the first heating section 111 and the narrow side 11a of the second heating section 112, and thus also facilitates uniform transition of the respective temperature fields. A step structure is formed between the narrow side 11a of the second heat generation section 112 and the narrow side 11a of the third heat generation section 112, so that the long heat generation strip 11 is better limited, and the bonding firmness of the heating element 1 and the infrared ceramic body 2 is improved.

In some embodiments, the portion of the infrared ceramic body 2 provided with the U-shaped cavity 21 is cylindrical; the end of the infrared ceramic body 2 away from the opening of the U-shaped cavity 21 is tapered. So arranged, insertion of the infrared ceramic body 2 into the aerosol-generating substrate is facilitated, the contact area of the aerosol-generating substrate and the infrared ceramic body 2 is increased, and the heating uniformity of the aerosol-generating substrate at the location of the tapered end of the infrared ceramic body 2 is improved.

In some embodiments, the heating element 1 is an electric heating body, and the electric heating body has a resistance value ranging from 0.5 Ω to 3 Ω; by matching with the infrared ceramic body 2, the infrared emissivity can reach 0.86 at the waveband of 3-5 mu m at normal temperature, which is beneficial to the uniform heating of the aerosol generating substrate and improves the taste consistency of the formed aerosol.

In some embodiments, two conductive connectors 3 are connected to one end of the two long heating strips 11 extending out of the U-shaped cavity 21, and the two conductive connectors 3 are respectively used for being electrically connected with the positive electrode and the negative electrode of the power supply.

In some embodiments, the base 4 is embodied as a zirconia ceramic base 4. The base 4 is provided with a mounting cavity 41, and one end of the infrared ceramic body 2 with the opening of the U-shaped cavity 21 extends into the mounting cavity 41 and is fixed on the base 4 in an adhesive manner; the bottom of the mounting cavity 41 is provided with a through hole for the conductive connector 3 to pass through. The ceramic material is made of zirconia with low heat conductivity, so that heat can be prevented from being conducted outwards through the base 4, and the temperature of the shell of the aerosol generating device can be reduced.

Embodiments also provide an aerosol-generating device comprising a housing having a heating chamber and an infrared heating element as described above disposed within the heating chamber. The aerosol generating device further comprises a power supply, the infrared heating body is electrically connected with the power supply, and the power supply provides electric power for the infrared heating body to generate heat. Such an aerosol-generating device receives heat from a heating element 1 through an infrared ceramic body 2 and heats up to produce infrared radiation and at least radiatively heats an aerosol-generating substrate; because infrared radiation has certain penetrability, it is effectual to the heating of aerosol generation substrate, and the composition in the aerosol generation substrate can obtain releasing ground fully, has promoted user's smoking and has experienced.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of this invention are intended to be covered by the scope of the invention as expressed herein.

Claims (12)

1. An infrared heating body is characterized by comprising an infrared ceramic body (2) and a heating element (1) embedded in the infrared ceramic body (2); the heating element (1) is used for generating heat, and the infrared ceramic body (2) is used for receiving the heat generated by the heating element (1) and radiating infrared rays outwards.

2. An infrared heat-generating body as described in claim 1, characterized in that said heat-generating element (1) is U-shaped, comprising two long heat-generating strips (11) extending in the same direction and a transverse heat-generating strip (12) connected between said two long heat-generating strips (11); a U-shaped cavity (21) matched with the heating element (1) in shape is formed in the infrared ceramic body (2); one end of the long heating strip (11) extends outwards from the opening of the U-shaped cavity (21), and the transverse heating strip (12) is completely arranged in the U-shaped cavity (21).

3. An infrared heat-generating body as described in claim 2, characterized in that the cross sectional area of the end of said long heat-generating strip (11) close to said transverse heat-generating strip (12) is smaller than the cross sectional area of the end of said long heat-generating strip (11) far from said transverse heat-generating strip (12).

4. An infrared heat-generating body as described in claim 3, characterized in that said long heat-generating strip (11) comprises a first heat-generating section (111), a second heat-generating section (112) and a third heat-generating section (113) which are arranged in this order from the near side to the far side from said transverse heat-generating strip (12), and the cross sectional areas of said first heat-generating section (111), said second heat-generating section (112) and said third heat-generating section (113) are increased in this order.

5. An infrared heat-generating body as described in claim 4, characterized in that a transition heat-generating section (114) is formed between the narrow side face (11 a) of said first heat-generating section (111) and the narrow side face (11 a) of said second heat-generating section (112).

6. An infrared heating body as set forth in claim 4, characterized in that the cross-section of two long heating strips (11) is rectangular, and one of the two long heating strips (11) facing each other is a narrow side face (11 a) of the long heating strip (11), and the side face of the long heating strip (11) adjacent to the narrow side face (11 a) is a wide side face (11 b); the distance between the narrow side surfaces (11 a) of two adjacent first heating sections (111) is greater than the distance between the narrow side surfaces (11 a) of two adjacent second heating sections (112), and the distance between the narrow side surfaces (11 a) of two adjacent second heating sections (112) is greater than the distance between the narrow side surfaces (11 a) of two adjacent third heating sections (113).

7. An infrared heating body as set forth in claim 2, characterized in that one end of two long heating strips (11) extending out of said U-shaped cavity (21) is connected with a conductive connecting body (3), and two conductive connecting bodies (3) are used for being electrically connected with the positive and negative electrodes of a power supply, respectively.

8. An infrared heating body as set forth in claim 7, characterized in that it further comprises a base (4), a mounting cavity (41) is provided on said base (4), and one end of said infrared ceramic body (2) having the opening of said U-shaped cavity (21) is extended into said mounting cavity (41) and fixed on said base (4); and the bottom of the mounting cavity (41) is provided with a through hole for the conductive connecting body (3) to pass through.

9. An infrared heat-generating body as described in claim 8, characterized in that the base (4) is a zirconia ceramic base (4).

10. An infrared heat-generating body as described in claim 1, characterized in that said heat-generating element (1) is an electric heating body having a resistance value in the range of 0.5-3 Ω; or, the heating element (1) is an electromagnetic inductor.

11. An infrared heat-generating body as described in claim 1, characterized in that said heat-generating element (1) is in any one of a sheet shape, a filament shape and a tube-rod shape.

12. An aerosol-generating device comprising a housing having a heating chamber and an infrared heating element as claimed in any one of claims 1 to 11 disposed within the heating chamber.

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