CN220441911U - Needle type heating body and heating non-combustion appliance - Google Patents

Abstract

The utility model discloses a needle type heating element and a heating non-combustion appliance, and relates to the technical field of heating non-combustion appliances, wherein the needle type heating element comprises: a body portion comprising a tubular substrate made of an electrically conductive ceramic material, the tubular substrate has a through hole extending in an axial direction; a conductive closed end electrically connected to one end of the tubular substrate; one end of the first lead is electrically connected with one side of the conductive closed end, which is close to the tubular substrate, and the first lead penetrates through the through hole, at least one electrode connection position or at least one second lead wire is arranged at one end of the tubular substrate far away from the conductive closed end. In the utility model, the condition that the conductive ceramic is slotted to form a conductive loop can be avoided, the structural strength of the needle-type heating element is improved; the two ends of the tubular base material are respectively connected through the conductive closed end and the electrode lead, the temperature of the needle type heating element is more uniform; the needle type heating body does not need to be slotted, and tar and residues are not easy to be hidden.

Description

Needle type heating body and heating non-combustion appliance

Technical Field

The utility model relates to the technical field of heating non-combustion appliances, in particular to a needle-type heating element and a heating non-combustion appliance.

Background

The working temperature of the heating non-Burning (HNB) electronic cigarette is about 300 ℃, so that various harmful substances generated under the lighting condition of common cigarettes can be effectively avoided, and the heating non-Burning (HNB) electronic cigarette has the advantages of no tar, no ash, no open flame and the like.

The core components of the heating non-burning electronic cigarette comprise three components, namely a battery, a main board, a heating body and the like. As for the heating element, the needle-type heating element has good taste of the sheet-type heating element, also has a mode of easily extracting cigarettes of the circumferential heating element, and has better application potential. However, the conventional needle-type heating element is usually a device which is prepared by thick film printing and comprises at least one heating track, but the needle-type heating element prepared by the method has the problem of uneven temperature field distribution and poor heating effect.

The conductive ceramic has high heat conductivity coefficient and more uniform temperature field distribution. The conventional conductive ceramic has to be subjected to kerf processing to form a conductive loop, so that the overall strength of the ceramic is reduced and the ceramic is easy to break.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the needle type heating element provided by the utility model can avoid a lancing process, and is beneficial to improving the strength and the reliability of a product.

The utility model also provides a heating non-combustion appliance with the needle type heating element.

An embodiment of the needle-type heating element according to an aspect of the present utility model includes: a body portion comprising a dense tubular substrate made of an electrically conductive ceramic material, the tubular substrate having axially extending through holes, the tubular substrate having a resistivity of 3 x 10 ^-5 ～10 ^-3 Omega cm, the thermal conductivity of the tubular substrate being greater than 25W/(m·k); conductive closed end andone end of the tubular substrate is electrically connected; one end of the first lead is electrically connected with one side of the conductive closed end, which is close to the tubular substrate, and the first lead penetrates through the through hole; wherein, the one end that the tubular substrate was kept away from electrically conductive blind end is provided with at least one electrode connection position or at least one second lead wire.

Further, the tubular substrate is integrally formed with the conductive closed end or welded by a conductive connector.

Further, the conductive ceramic is a silicon carbide, silicon nitride, aluminum oxide, zirconium oxide, or aluminum nitride conductive ceramic.

Further, the conductive ceramic includes a conductive ceramic of Pt, au, ag, fe, ni, cr, ti, al, W, mo, titanium diboride, titanium carbide, zirconium diboride or graphite.

Further, the outer diameter of the tubular substrate is less than or equal to 3mm.

Further, the wall thickness of the tubular base material is in the range of 0.01-1 mm.

Further, the number of the electrode connection sites or the second leads is plural.

Further, insulating materials are filled in the through holes.

Further, the electrode connecting layer is arranged at one end of the tubular substrate far away from the conductive closed end, and the electrode connecting position or the second lead wire is arranged at the electrode connecting layer, wherein the resistivity of the electrode connecting layer is smaller than that of the tubular substrate.

Further, the conductive closed end is a tip, and the cross-sectional area of the conductive closed end gradually decreases along the direction away from the tubular substrate.

Further, the conductive closed end is made of metal or conductive ceramic.

Further, the conductive closed end and the first lead are integrally formed by metal materials.

Further, the conductive closed end, the first lead and the tubular substrate are made of conductive ceramics, and the conductive closed end, the first lead and the tubular substrate are integrally formed and sintered.

Further, the outer periphery of the first lead is plated with a silver metal layer and/or one end of the conductive closed end, which is close to the tubular substrate, is plated with a silver metal layer.

Further, the second lead has a plurality of leads.

According to another aspect of the utility model, the heating non-combustion appliance comprises a power supply, a control circuit board and the needle-type heating body, wherein the needle-type heating body is electrically connected with the power supply through the first lead wire and the second lead wire respectively, or the needle-type heating body is electrically connected with the power supply through the first lead wire and the electrode connecting position respectively.

The needle-type heating element has at least the following beneficial effects: the first lead is connected with the conductive closed end, the conductive closed end is electrically connected with one end of the tubular substrate, and in operation, the other end of the tubular substrate is connected with the other electrode lead or electrode to form a conductive loop. According to the utility model, the needle type heating element does not need to be cut to form a conductive loop, so that the strength of the needle type heating element can be ensured, the process difficulty is reduced, tar and residues are not easy to be hidden, and the cleaning difficulty is effectively reduced. Because the needle type heating body does not need to be cut, the heating area of the needle type heating body is larger, and the circumferential temperature of the needle type heating body can be more uniform; the thermal conductivity of the tubular substrate is more than 25W/(m.K), so that the length of the uniform temperature section of the tubular substrate is longer, and the aerosol formed by heating has better taste. The compact tubular substrate has good heat transfer effect, and can ensure that the uniform temperature section reaches a larger proportion when the heating body is in a working state; on the other hand, the dense tubular substrate adopted in the embodiment of the application is not easy to store dirt, such as tar, so that the probability of causing burnt taste is effectively reduced.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The utility model is further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is an assembly schematic of one embodiment of a needle-type heating element according to an embodiment of an aspect of the present utility model;

FIG. 2 is an assembly schematic of one embodiment of a needle-type heating element according to an embodiment of the present utility model;

FIG. 3 is an assembly schematic of one embodiment of a needle-type heating element according to an aspect of the present utility model.

Reference numerals:

100. a tubular substrate;

200. a conductive closed end; 210. a conductive connection;

300. a first lead.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, the meaning of a number is one or more, the meaning of a number is two or more, and greater than, less than, exceeding, etc. are understood to exclude the present number, and the meaning of a number is understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

In the description of the present utility model, the descriptions of the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In the existing needle-type heating element made of conductive ceramics, the diameter of the needle-type heating element is very small, and the strength of the heating element after lancing is greatly reduced; no kerf is formed and no conductive loop is formed; for a fine needle structure, the lancing not only increases the process difficulty, but also causes the cleaning difficulty to be increased, and tar and residues are easy to be hidden; most importantly, the strength of the needle-type heating element after lancing is greatly reduced, and the needle-type heating element is easy to break.

In view of the above, the present utility model provides a needle-type heating element and a heating non-combustion device to effectively solve the above-mentioned problems.

Referring to fig. 1 to 3, an embodiment of an aspect of the present utility model discloses a needle-type heating element including a body portion, a conductive closed end 200, and a first lead 300.

Specifically, as shown in fig. 1 to 3, the main body portion includes a dense tubular substrate 100 made of a conductive ceramic material, the tubular substrate 100 having axially extending through holes, and the tubular substrate 100 having a resistivity of 3×10 ^-5 ～10 ^-3 Omega cm, tubular substrate100 has a thermal conductivity greater than 25W/(mK); the conductive closed end 200 is electrically connected to one end of the tubular substrate 100; one end of the first lead 300 is electrically connected with one side of the conductive closed end 200, which is close to the tubular substrate 100, and the first lead 300 penetrates through the through hole; wherein, the end of the tubular substrate 100 far away from the conductive closed end 200 is provided with at least one electrode connection site or at least one second lead. Specifically, one end of the first lead 300 is fixedly connected with the conductive closed end 200, and the conductive closed end 200 is fixedly connected with one end of the tubular substrate 100; the other end of the tubular substrate 100 may be electrically connected to a power supply source via a lead wire, or may be directly electrically connected to an electrode of the power supply source to form a conductive loop. It should be noted that the meaning of "dense" in the dense tubular substrate 100 is that the porosity is less than 1%; wherein, the porosity is: the cross section of the tubular substrate 100 is enlarged 200-500 times and then the ratio of the pore area to the cross sectional area is measured by using pixel statistical software (e.g., matlab).

In operation, the other end of the first lead 300 is electrically connected to an electrode of the power supply, and the electrode connection site of the other end of the tubular substrate 100 or the second lead is connected to another electrode of the power supply, so that the tubular substrate 100 forms a conductive loop, and the temperature of the tubular substrate 100 is increased.

In the utility model, the main body part of the needle-type heating element is formed by the tubular base material 100, and is respectively connected with the two ends of the tubular base material 100 through the conductive closed end 200 and the electrode or the electrode lead, so that the condition that a conductive loop is formed by slotting conductive ceramic can be avoided, and the structural strength of the needle-type heating element is improved; the two ends of the tubular base material 100 are respectively connected with the electrode lead or the electrode through the conductive closed end 200, and the tubular base material 100 can increase the heating area without slotting, so that the tubular base material 100 of the main body part is entirely used as a heating area, and the temperature of the needle-type heating element is more uniform; because the needle type heating element does not need to be slotted, the process difficulty is reduced, tar and residues are not easy to be hidden, and the cleaning difficulty is effectively reduced. In addition, in the embodiment of the application, the compact tubular substrate 100 has good heat transfer effect, and can ensure that the uniform temperature section reaches a larger proportion when the heating element is in a working state; on the other hand, the dense tubular substrate 100 adopted in the embodiment of the present application is not easy to collect dirt, such as tar, and the like, and effectively reduces the probability of causing burnt taste. The average temperature range refers to a portion where the temperature in the axial direction of the tubular base material 100 is within a certain range (for example, the range is the maximum temperature of the needle heater.+ -. 20 ℃).

In some embodiments of the utility model, the thermal conductivity of the tubular substrate 100 is greater than 50W/(mK). When the thermal conductivity of the tubular substrate 100 of an electrically conductive ceramic material is greater than 50W/(m·k), a better taste can be obtained for the heated cigarette.

In some embodiments of the utility model, the conductive ceramic is a silicon carbide, silicon nitride, aluminum oxide, zirconium oxide, or aluminum nitride conductive ceramic. Further, the conductive ceramic is a conductive ceramic containing Pt, au, ag, fe, ni, cr, ti, al, W, mo, titanium diboride, titanium carbide, zirconium diboride or graphite. Thus, the length of the uniform temperature section of the needle-type heating element of the present embodiment can be made longer, so that the heating taste of the heating non-combustion appliance is better.

Wherein the tubular substrate 100 comprises a matrix material and a conductive phase. Wherein the matrix material comprises silicon carbide, silicon nitride, aluminum oxide, zirconium oxide or aluminum nitride; the conductive phase has conductive capabilities and is capable of forming a conductive loop. Further, the conductive phase may be a metallic material or a nonmetallic material. When the conductive phase is a metallic material, it may be one of Pt, au, ag, fe, ni, cr, ti, al, W or Mo; when the conductive phase is a nonmetallic material, it may be one or more of titanium diboride, titanium carbide, zirconium diboride or graphite. Based on the above, the length of the uniform temperature section of the needle-type heating element of the embodiment is advantageously longer, so that the heating taste of the heating non-combustion appliance is better. Further, the base material is preferably silicon carbide, silicon nitride or aluminum nitride; the conductive phase is preferably a refractory metallic material, such as but not limited to Ag, pt, or a nonmetallic compound, such as but not limited to titanium diboride, titanium carbide.

In the foregoing embodiment, the outer diameter of the tubular base material 100 is less than or equal to 3mm, so that the situation that the tobacco shreds are mutually extruded to cause smoking difficulty when the needle-type heating element is inserted into a cigarette can be reduced, and the use experience can be improved.

Further, the wall thickness of the tubular base material 100 is in the range of 0.01 to 1mm. Thus, the tubular base material 100 has sufficient strength to effectively reduce bending deformation; meanwhile, the energy consumption of the needle type heating element is reduced; in addition, it is also possible to ensure that the inside of the tubular base material 100 has enough space to facilitate the extraction of the first lead 300 from the inside of the tubular base material 100. In practical applications, the wall thickness of the tubular substrate 100 may be set to 0.01mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm … …, as required

In some embodiments, one end of the tubular substrate 100 is electrically connected to the conductive closed end 200, and a plurality of electrode connection sites are disposed at the other end of the tubular substrate 100, where the electrode connection sites are used to connect electrodes or electrode leads, so that a plurality of parallel conductive loops are formed in the tubular substrate 100, which is beneficial to make the temperature of the pin-type heating element more uniform.

In some embodiments, the through holes of the tubular substrate 100 are filled with an insulating material, which has insulation and fixing reinforcement functions, so that the insulating material can fix the leads on one hand, so that the circuit is more stable, and insulation between the leads and the heating tube is ensured; on the other hand, the insulating material has a buffering effect, and when the needle-type heating element falls, the buffering effect can be achieved, so that the fracture risk of the needle-type heating element is effectively reduced. It is understood that the insulating material is an elastic material having an insulating function, and the insulating material may be, but not limited to, alumina, zirconia, glass frit, PI (polyimide), PEEK (polyether ether ketone), and the like.

In some embodiments of the present utility model, the pin-type heating element further includes an electrode connection layer disposed at an end of the tubular substrate 100 remote from the conductive closed end 200, and the electrode connection site or the second lead is disposed at the electrode connection layer, wherein the resistivity of the electrode connection layer is smaller than that of the tubular substrate 100. This can improve the high-temperature aging resistance of the needle heater.

In some embodiments of the present utility model, the tubular substrate 100 is integrally formed with the conductive closed end 200 or welded by the conductive connector 210. Specifically, the tubular substrate 100 may be integrally formed with the conductive closed end 200, or may be connected to the conductive closed end 200 by welding such as vacuum brazing. The conductive closed end 200 has conductive capability, and the tubular substrate 100 is made of conductive ceramic material, so that the conductive closed end 200 can be electrically connected with the tubular substrate 100 to form a conductive loop.

It should be appreciated that the radius of the circumference of the lower end of the conductive closed end 200 is at least greater than the inner diameter of the tubular substrate 100 to enable the conductive closed end 200 to be secured to one end of the tubular substrate 100; the lower end of the conductive closed end 200 may have the same size as the outer circumferential dimension of the tubular substrate 100, or may be smaller or larger than the outer circumferential dimension of the tubular substrate 100; the conductive closed end 200 may be formed in a tapered shape or the outer end surface of the conductive closed end 200 may be formed in a curved surface with a rounded transition, which is not limited herein.

In some embodiments of the utility model, conductive closed end 200 and first lead 300 are made by wire machine drawing, or conductive closed end 200 and first lead 300 are joined by metal butt-welding or ceramic vacuum brazing.

As one embodiment, as shown in fig. 1, the conductive closed end 200 and the first lead 300 are obtained by drawing a metal wire rod, and the conductive closed end 200 and the first lead 300 are in an integral structure, that is, the first lead 300 and the conductive closed end 200 are made of metal with certain rigidity, and at this time, the resistivity of the conductive closed end 200 and the first lead 300 is lower than that of the tubular substrate 100, and the use of the closed end with low resistivity and the first lead 300 is beneficial to reducing the temperature at the connection part with the battery rod. When in assembly, the bottom end surface of the conductive closed end 200 is abutted against one end of the tubular substrate 100, the first lead 300 is inserted into the through hole of the tubular substrate 100, and then the conductive closed end 200 is connected and fixed with the tubular substrate 100 through the conductive connecting piece 210 (such as conductive components of conductive paste, conductive adhesive, conductive solder, etc.). Wherein, a gap is provided between the first lead 300 and the inner wall of the tubular substrate 100. In practice, the welding may be vacuum brazing.

As one embodiment, as shown in fig. 2, a first lead 300 is fixedly connected to the bottom of the conductive closed end 200. When in assembly, the bottom of the conductive closed end 200 is abutted against one end of the tubular substrate 100, the first lead 300 is penetrated into the through hole of the tubular substrate 100, and then the conductive closed end 200 is fixed with the tubular substrate 100 by using vacuum brazing solder. The conductive closed end 200 is made of metal or conductive ceramic, and the metal or conductive ceramic has conductivity, so that a conductive loop can be formed with the tubular substrate 100.

As one embodiment, as shown in fig. 3, the conductive closed end 200 is a conductive ceramic integrally formed with the tubular substrate 100. In assembly, one end of the first lead 300 is inserted into the through hole of the tubular substrate 100 and then fixedly connected to the bottom of the conductive closed end 200 by metal butt-welding or ceramic vacuum brazing.

In some embodiments of the present utility model, the conductive closed end 200, the first lead 300 and the tubular substrate 100 are made of conductive ceramics, and are integrally formed and sintered. This can improve the aging resistance of the needle heater.

Further, the outer circumference of the first lead 300 of conductive ceramic material is plated with a silver metal layer and/or the bottom surface of the conductive closed end 200 (i.e., the end surface of the conductive closed end 200 near the tubular substrate 100) is plated with a silver metal layer. Thus, the temperature of the power supply assembly located at the side of the needle-type heating element can be further reduced, and the occurrence of burnt smell due to heat concentration in the operation state of the conductive closed end 200 can be advantageously reduced.

Further, the second lead has a plurality of leads, which is favorable for realizing more uniform temperature field distribution in the circumferential direction and can reduce the probability of occurrence of burnt smell.

In some embodiments of the present utility model, referring to fig. 1-3, the conductive closed end 200 is pointed, and the cross-sectional area of the conductive closed end 200 gradually decreases in a direction away from the tubular substrate 100.

In some embodiments of the present utility model, the tubular substrate 100 is made of a conductive ceramic, which may be specifically selected from, but not limited to, silicon carbide-titanium diboride, aluminum oxide-titanium diboride, or zirconium oxide-titanium diboride. Further, the outer diameter of the tubular substrate 100 may be set to a size of 2mm, 2.2mm, 3mm, or the like as required. Conductive closed end 200 is a device with conductive capabilities. For example, the conductive closed end 200 may be a conductive member made of silver plating on the outer wall of a conical nickel block, or may be a conductive member made of conical conductive ceramic. The first lead 300 should have conductive capability to perform a conductive function. In practical applications, the first lead 300 may be fixedly connected to the bottom of the conductive closed end 200 by machining or resistance butt welding, or may be fixedly connected to the conductive closed end 200 by vacuum brazing.

It should be noted that the needle-type heat generating body of the embodiment of the present application can be relatively uniformly distributed in the temperature field in the axial direction and the circumferential direction of the tubular base material 100. For example, in some embodiments, when the temperature in the middle of the tubular substrate 100 is 300 ℃, the temperature at the end of the tubular substrate 100 near the conductive closed end 210 can reach 280 ℃, and the temperature at the end of the needle-shaped heating element far from the conductive closed end 210 can reach 100 ℃, the length of the tubular substrate 100 with the temperature of 280 ℃ to 300 ℃ can be greater than 85% of the total length of the tubular substrate 100; in other embodiments, when the temperature of the middle portion of the tubular substrate 100 is 280 ℃, the temperature of the end of the tubular substrate 100 near the conductive closed end 210 can reach 270 ℃, and the temperature of the end far from the conductive closed end 210 can reach 140 ℃, and the length of the tubular substrate 100 at 260 ℃ to 280 ℃ can reach 85% or more of the total length; in still other embodiments, when the temperature of the middle portion of the tubular substrate 100 is 250 ℃, the temperature of the end of the tubular substrate 100 near the conductive closed end 210 can reach 230 ℃, and the temperature of the end far from the conductive closed end 210 can reach 95 ℃, and the length of the tubular substrate 100 at 230 ℃ to 250 ℃ can be greater than 90% of the total length. In terms of the circumferential direction of the tubular base material 100, the needle-type heating element avoids the condition of slotting on the tubular base material 100 to form a conductive loop, increases the heating area and is beneficial to improving the heating uniformity; on the other hand, compared with the conventional needle-type heating element which heats through a heating track, the tubular substrate 100 in the needle-type heating element of the present application heats integrally, and the heating uniformity is better.

It should be understood that the conductive closed end 210, the first lead 300, and the tubular substrate 100 are all made of materials, thicknesses, and connection manners, which may make the temperature distribution of the needle-type heating element different.

As one embodiment, the inside of the tubular base material 100 is filled with an insulating material such as insulating ceramics, glass frit, PI, and PEEK. Specifically, the insulating material can fix the first lead 300 on one hand, so that the circuit is more stable, and insulation between the first lead 300 and the tubular substrate 100 is ensured; on the other hand, the insulating material has a buffering effect, and when the needle-type heating element falls, the buffering effect can be achieved, so that the fracture risk of the needle-type heating element is effectively reduced.

As one embodiment, after the conductive closed end 200 is fixedly connected with the first lead 300, the conductive closed end 200 and the first lead 300 may be integrally silver-plated to enhance the conductive capability of the conductive closed end 200 and the first lead 300.

In another aspect, the embodiment of the utility model discloses a heating non-combustion appliance, which comprises a power supply, a control circuit board and a needle-type heating element as before, wherein the needle-type heating element is respectively and electrically connected with the power supply through a first lead 300 and a second lead, or the needle-type heating element is respectively and electrically connected with the power supply through the first lead 300 and an electrode connecting position. It should be understood that the heating non-combustion appliance of the embodiment of the present application has all the technical effects of the aforementioned needle-type heating element. For example, in the heating non-combustion appliance of the embodiment, the main body part of the needle-type heating element is formed by the tubular base material 100, and is respectively connected with two ends of the tubular base material 100 through the conductive closed end 200 and the electrode or the electrode lead, so that the condition of forming a conductive loop by slotting the conductive ceramic can be avoided, and the structural strength of the needle-type heating element can be improved; meanwhile, two ends of the tubular base material 100 are respectively connected with the electrode lead or the electrode through the conductive closed end 200, so that the tubular base material 100 of the main body part is used as a heating area, the heating area of the needle-type heating element is increased, the temperature of the needle-type heating element is more uniform, and the heating non-combustion appliance disclosed by the embodiment of the application is beneficial to increasing the contact area of the needle-type heating element and heated objects such as tobacco shreds, and the heating efficiency and user experience are improved; in addition, as the needle type heating element does not need to be slotted, the process difficulty is reduced, tar and residues are not easy to be hidden, and the cleaning difficulty is effectively reduced, and on the other hand, the dense tubular substrate 100 adopted in the embodiment of the application is not easy to be hidden, so that the probability of causing burnt smell is effectively reduced.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model. Furthermore, embodiments of the utility model and features of the embodiments may be combined with each other without conflict.

Claims (14)

1. A needle-type heating element, comprising:

a body portion comprising a dense tubular substrate made of an electrically conductive ceramic material, the tubular substrate having axially extending through holes, the tubular substrate having a resistivity of 3 x 10 ^-5 ～10 ^-3 Omega cm, the thermal conductivity of the tubular substrate being greater than 25W/(m·k);

a conductive closed end electrically connected to one end of the tubular substrate;

one end of the first lead is electrically connected with one side of the conductive closed end, which is close to the tubular substrate, and the first lead penetrates through the through hole;

wherein, the one end that the tubular substrate was kept away from electrically conductive blind end is provided with at least one electrode connection position or at least one second lead wire.

2. A pin heat generator according to claim 1, wherein the tubular base material is integrally formed with the conductive closed end or welded by a conductive connecting member.

3. A needle-type heating body according to claim 1, wherein the conductive ceramic is a silicon carbide, silicon nitride, aluminum oxide, zirconium oxide or aluminum nitride conductive ceramic.

4. A needle-type heat generating body as described in claim 1, wherein an outer diameter of the tubular base material is 3mm or less.

5. A needle type heat generating body as described in claim 1, wherein a wall thickness of said tubular base material is in a range of 0.01 to 1mm.

6. A needle-type heat generating body as recited in claim 1, wherein the through hole is filled with an insulating material.

7. A needle-type heating body according to claim 1, further comprising an electrode connection layer provided at an end of the tubular base material remote from the conductive closed end, the electrode connection site or the second lead being provided at the electrode connection layer, wherein the electrode connection layer has a resistivity smaller than that of the tubular base material.

8. A pin heat generator according to any one of claims 1 through 7, wherein the conductive closed end is pointed, and the conductive closed end has a cross-sectional area that gradually decreases in a direction away from the tubular base material.

9. A pin heat generator as set forth in claim 8, wherein the conductive closed end is made of metal or conductive ceramic.

10. A needle-type heating body as claimed in claim 1, wherein the conductive closed end and the first lead are integrally formed of a metal material.

11. A pin type heating body as set forth in claim 1 wherein said conductive closed end, said first lead wire and said tubular base material are made of conductive ceramics, and said conductive closed end, said first lead wire and said tubular base material are integrally formed and sintered.

12. A pin heat generator according to claim 11, wherein the outer periphery of the first lead is plated with a silver metal layer and/or the end of the conductive closed end near the tubular base material is plated with a silver metal layer.

13. A needle type heat generating body as described in claim 1, wherein said second lead has a plurality of.

14. A heating non-combustion appliance, comprising a power supply, a control circuit board and a needle-type heating element according to any one of claims 1 to 13, wherein the needle-type heating element is electrically connected to the power supply through the first lead and the second lead, respectively, or the needle-type heating element is electrically connected to the power supply through the first lead and an electrode connection site, respectively.