Aerosol generating device and heating needle assembly thereof

Abstract

The utility model relates to the technical field of atomization devices, in particular to an aerosol generating device and a heating needle assembly thereof. As the heating needle of the heating needle assembly is provided with the temperature measurement heat conduction layer, heat of the insertion section can be conducted to the external section through the temperature measurement heat conduction layer, the temperature of the temperature measurement heat conduction layer is measured through the temperature measurement piece, and the temperature of the insertion section on the heating needle is obtained according to the temperature of the temperature measurement heat conduction layer. According to the heating element assembly, the temperature measurement heat conduction layer is connected with the temperature measurement element, the heat of the insertion section is transmitted to the temperature measurement element through the temperature measurement heat conduction layer, measurement of the temperature of the insertion section is achieved, and the measurement mode is not affected by the resistance temperature coefficient. Besides, the temperature measuring piece is connected with the external section part, so that the external section is positioned outside the aerosol generating rod during use and is not easy to corrode, and the connection reliability of the external section part and the temperature measuring piece is better.

Description

Technical Field

[0001] This application relates to the field of atomization device technology, specifically to an aerosol generating device and its heating needle assembly. Background Technology

[0002] Aerosol generating devices are used to generate aerosols for users to inhale. One current type of aerosol generating device generates aerosols by heating an aerosol generating rod. Specifically, the aerosol generating rod is inserted into the device, and a heating needle within the device is inserted into the rod to heat it and generate aerosols. The heating needle typically needs to control the temperature while heating the aerosol generating rod to ensure that the materials used to generate the aerosol produce aerosols without combustion. Currently, temperature measurement of the heating needle is generally achieved through its resistance-temperature coefficient (RTC) characteristics. However, for magnetic induction heating needles, which are usually made of materials with low RTC, this method results in low temperature measurement accuracy. Utility Model Content

[0003] This application provides a heating needle assembly for an aerosol generating device, which improves the problem of low measurement accuracy of heating needles with small resistance temperature coefficients in current temperature measurement methods.

[0004] In addition, the purpose of this application is to provide an aerosol generating device using the above-mentioned heating needle assembly.

[0005] In a first aspect, one embodiment provides a heating needle assembly, comprising:

[0006] A heating needle, comprising a needle body and a temperature-sensing and heat-conducting layer on the outer surface of the needle body, the needle body comprising an insertion section and an outer section, the insertion section being used to insert into an aerosol generating rod to heat the aerosol generating rod, and the outer section being used to be placed outside the aerosol generating rod; the temperature-sensing and heat-conducting layer comprising an insertion section portion in thermal contact with the insertion section and an outer section portion in thermal contact with the outer section;

[0007] And a temperature measuring element, which is connected to the external section portion to measure the temperature of the temperature-conducting heat-sensing layer.

[0008] Furthermore, in one embodiment, the thermal conductivity of the temperature-sensing heat-conducting layer is greater than that of the needle body.

[0009] In another embodiment, the insertion segment partially covers a portion of the outer surface of the insertion segment, and the outer segment partially covers a portion of the outer segment.

[0010] In another embodiment, the temperature measuring element is welded to the external segment portion.

[0011] In another embodiment, the temperature measuring element is a thermocouple.

[0012] In a further embodiment, the heating needle has a hollow structure, and has an air inlet and an air outlet. The air inlet is located on the outer section, and the air outlet is located on the insertion section. An airflow channel connecting the air inlet and the air outlet is formed inside the heating needle.

[0013] In another embodiment, the heating needle is a magnetic induction heating needle used to generate heat in an alternating magnetic field.

[0014] In another embodiment, the heating needle further includes a protective layer that at least covers the connection between the temperature measuring element and the external segment.

[0015] In a second aspect, one embodiment provides an aerosol generating device, including a housing and a heating needle assembly, the heating needle assembly comprising:

[0016] A heating needle, comprising a needle body and a temperature-sensing and heat-conducting layer on the outer surface of the needle body, the needle body comprising an insertion section and an outer section, the insertion section being used to insert into an aerosol generating rod to heat the aerosol generating rod, and the outer section being used to be placed outside the aerosol generating rod; the temperature-sensing and heat-conducting layer comprising an insertion section portion in thermal contact with the insertion section and an outer section portion in thermal contact with the outer section;

[0017] And a temperature measuring element, which is connected to the external section portion to measure the temperature of the temperature-conducting heat-sensing layer.

[0018] Furthermore, in one embodiment, the thermal conductivity of the temperature-sensing heat-conducting layer is greater than that of the needle body.

[0019] In another embodiment, the insertion segment partially covers a portion of the outer surface of the insertion segment, and the outer segment partially covers a portion of the outer segment.

[0020] In another embodiment, the temperature measuring element is welded to the external segment portion.

[0021] In another embodiment, the temperature measuring element is a thermocouple.

[0022] In a further embodiment, the heating needle has a hollow structure, and has an air inlet and an air outlet. The air inlet is located on the outer section, and the air outlet is located on the insertion section. An airflow channel connecting the air inlet and the air outlet is formed inside the heating needle.

[0023] In another embodiment, the heating needle further includes a protective layer that at least covers the connection between the temperature measuring element and the external segment.

[0024] In a further embodiment, the aerosol generating device includes an induction coil, and the heating needle is a magnetic induction heating needle used to generate heat in the alternating magnetic field of the induction coil.

[0025] In a further embodiment, the aerosol generating device includes a receiving cup, a receiving cavity located within the receiving cup, a heating needle inserted into the receiving cup, an external section extending outside the receiving cup, and a temperature measuring element located outside the receiving cup.

[0026] According to the heating needle assembly of the above embodiment, since the heating needle of the heating needle assembly has a temperature-sensing and heat-conducting layer, which is connected to the temperature-sensing element, the heat of the insertion section can be conducted to the temperature-sensing element through the temperature-sensing and heat-conducting layer. The temperature of the insertion section on the heating needle can be obtained based on the temperature of the temperature-sensing and heat-conducting layer, thus realizing the measurement of the insertion section temperature. This measurement method is not affected by the temperature coefficient of resistance of the needle body. In addition, since the temperature-sensing element is connected to the external section, the external section is outside the aerosol generating rod during use, making it less susceptible to corrosion, and the connection between the external section and the temperature-sensing element has better reliability. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the aerosol generation device in one embodiment;

[0028] Figure 2 This is a side view of an aerosol generating apparatus in one embodiment;

[0029] Figure 3 For along Figure 2 Sectional view of AA;

[0030] Figure 4 This is a schematic diagram of the structure of the heating needle assembly in one embodiment;

[0031] Figure 5 An exploded view of the heating needle assembly in one embodiment;

[0032] Figure 6 This is a cross-sectional view of a heating needle assembly in one embodiment.

[0033] List of feature names corresponding to the attached figures: 1. Aerosol generating rod; 11. Suction end; 12. Air inlet end; 2. Outer shell; 21. Receiving cavity; 3. Heating needle; 31. Needle body; 311. Insertion section; 312. External section; 32. Temperature measuring and heat-conducting layer; 321. Insertion section portion; 322. External section portion; 33. Air inlet; 34. Air outlet; 35. Airflow channel; 36. Protective layer; 4. Temperature measuring element; 5. Induction coil; 6. Coil mounting sleeve; 7. Receiving cup; 8. Heating needle mounting base; 9. Power supply.

[0034] Explanation of reference numerals in parentheses in the accompanying drawings: The feature referred to by the reference numerals in parentheses in the accompanying drawings is the feature represented by both the number inside the parentheses and the number outside the parentheses. Detailed Implementation

[0035] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0036] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0037] In the description herein, it should be understood that the terms “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection, an abutment, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0040] The embodiments described in the detailed implementation can be combined in any suitable manner without contradiction. For example, different implementation methods can be formed by combining different embodiments. In order to avoid unnecessary repetition, the various possible combinations of the embodiments will not be described separately.

[0041] In current magnetic induction heating aerosol generating devices, the temperature coefficient of resistance of the heating element is relatively small. The temperature of the heating element measured using the resistance-temperature relationship characteristics deviates significantly from the actual temperature. To improve this problem, this application adopts a new method for measuring the temperature of the heating needle. The temperature measurement method of the heating element is described in detail below with reference to the accompanying drawings.

[0042] First, let's explain the object being heated by the heating needle assembly, namely the aerosol generating rod. Please refer to [link / reference needed]. Figures 1 to 3The aerosol generating rod 1 has a suction end 11 for drawing in aerosols at one end and an air inlet end 12 at the other end, which supplies gas into the aerosol generating rod 1 during suction. The suction end 11 has a filter (not shown in the figure). The filter (not shown in the figure) can be made of various existing or future feasible materials, such as sponge or cigarette holder paper. The aerosol generating rod 1 contains an aerosol generating matrix, and the suction end 11 of the aerosol generating rod 1 has filter cotton. The aerosol generating matrix is ​​an aerosol filament or aerosol sheet used to generate aerosols. In some embodiments, the aerosol generating matrix is ​​a heat-non-combustible matrix, meaning that it can generate aerosols in a non-combustible state after heating.

[0043] In one embodiment, please refer to Figures 3 to 6 The aerosol generating device includes a housing 2 and a heating needle assembly, wherein the housing 2 has a receiving cavity 21 for inserting the aerosol generating rod 1.

[0044] The heating needle assembly includes a heating needle 3 and a temperature measuring element 4. The heating needle 3 includes a needle body 31 and a temperature measuring and heat-conducting layer 32 on the outer surface of the needle body 31. The needle body 31 includes an insertion section 311 and an external section 312. The insertion section 311 is located in the receiving cavity 21 and is used to insert the aerosol generating rod 1 to heat the aerosol generating rod. The external section 312 is used to be placed outside the aerosol generating rod 1.

[0045] The temperature-sensing heat-conducting layer 32 includes an insertion section 321 and an external section 322. The insertion section 321 is in thermal contact with the insertion section 311, and the external section 322 is in contact with the external section 312. The temperature sensing element 4 is connected to the external section 322 to measure the temperature of the temperature-sensing heat-conducting layer 32.

[0046] Because the heating needle 3 of the heating needle assembly has a temperature-sensing and heat-conducting layer 32, which is connected to the temperature-sensing element 4, the heat from the insertion section 311 can be conducted to the temperature-sensing element 4 through the temperature-sensing and heat-conducting layer 32. The temperature of the insertion section 311 on the heating needle 3 can be obtained based on the temperature of the temperature-sensing and heat-conducting layer 32, thus realizing the measurement of the temperature of the insertion section 311. This measurement method is not affected by the temperature coefficient of resistance of the needle body 31. In addition, because the temperature-sensing element 4 is connected to the external section 322, the external section 322 is outside the aerosol generating rod 1 during use, making it less susceptible to corrosion, and the connection between the external section 322 and the temperature-sensing element 4 has better reliability.

[0047] In one embodiment, please refer to Figure 5 and Figure 6 The outer section 322 and the outer section 312 are in thermally conductive contact. Since the needle body 31 has a higher temperature, this allows the outer section 322 to be closer to the temperature of the insertion section 311. Of course, in some other embodiments, a heat insulation layer can also be provided between the outer section 322 and the outer section 312.

[0048] In one embodiment, please refer to Figure 3 The aerosol generating device includes an induction coil 5 and a heating needle 3, which is a magnetic induction heating needle used to generate heat in the alternating magnetic field of the induction coil 5. By causing the induction coil 5 to generate an alternating magnetic field, the heating needle 3, which is in the alternating magnetic field, generates heat to heat the aerosol generating rod 1. In one embodiment, the heating needle 3 is made of stainless steel. Specifically, the heating needle 3 is made of 430 stainless steel.

[0049] In one embodiment, please refer to Figure 5 and Figure 6 To protect the connection between the temperature sensing element 4 and the external section 322, the heating needle 3 also includes a protective layer 36. The protective layer 36 at least covers the connection between the temperature sensing element 4 and the external section 322, which can better prevent the oil generated by the aerosol generating rod 1 from corroding the connection. In one embodiment, the protective layer 36 covers the entire needle body 31.

[0050] Furthermore, in one embodiment, please refer to Figure 5 and Figure 6 The protective layer 36 is a glass enamel layer. In some other embodiments, the protective layer 36 can also be any other feasible corrosion-resistant layer, such as a corrosion-resistant metallic coating, a ceramic layer, or other non-metallic coating. In one embodiment, the glass enamel layer has a thickness of 0.03 mm.

[0051] Regarding the connection method between the temperature measuring element 4 and the external section 322, please refer to one embodiment. Figure 5 and Figure 6 The temperature sensing element 4 is welded to the external section 322. Welding improves the thermal conductivity of the temperature sensing element 4 and the external section 322. In some other embodiments, in addition to welding the temperature sensing element 4 to the external section 322, other connection methods can be used, such as bonding with thermally conductive adhesive, pressing with clamping components, or riveting.

[0052] In one embodiment, please refer to Figure 5 and Figure 6 Temperature sensing element 4 is a thermocouple. In some other embodiments, temperature sensing element 4 may also be other feasible temperature sensors.

[0053] In one embodiment, the thermal conductivity of the temperature-sensing heat-conducting layer 32 is greater than that of the needle body 31, so that the temperature of the temperature-sensing heat-conducting layer 32 is closer to the temperature of the insertion section 311, and the measured temperature is more accurate.

[0054] In one embodiment, to achieve better heat conduction, the temperature-sensing heat-conducting layer 32 is a silver layer. Silver has good thermal conductivity, which is beneficial for improving the accuracy of temperature measurement. Specifically, in one embodiment, the silver layer thickness is 0.01 mm. In some other embodiments, the temperature-sensing heat-conducting layer 32 can also be other metals with good thermal conductivity, such as copper, diamond, etc.

[0055] To reduce costs, please refer to Figure 5 and Figure 6 The temperature-sensing and heat-conducting layer 32 does not cover the entire insertion section 311 and the external section 312. In one embodiment, please refer to... Figure 5 and Figure 6 The insertion section portion 321 covers a portion of the outer surface of the insertion section 311, and the outer section portion 322 covers a portion of the outer section 312. That is, the temperature-sensing and heat-conducting layer 32 only covers a portion of the outer surface of the insertion section 311 and a portion of the outer surface of the outer section 312. In one embodiment, the temperature-sensing and heat-conducting layer 32 is elongated and extends in the same direction as the length of the heating needle 3.

[0056] In one embodiment, please refer to Figures 3 to 6 The heating needle 3 has a hollow structure and includes an air inlet 33 and an air outlet 34. The air inlet 33 is located on the outer section 322, and the air outlet 34 is located on the insertion section 321. An airflow channel 35 is formed inside the heating needle 3, connecting the air inlet 33 and the air outlet 34. This allows the heating needle 3 to supply air to the aerosol generating rod 1 in a timely manner. As the airflow passes through the airflow channel 35, the heating needle 3 heats the airflow, resulting in more uniform heating of the aerosol generating rod 1. In some other embodiments, the heating needle 3 may not have an air inlet 33 and an air outlet 34; instead, an air inlet 33 is opened at the bottom of the container cup to supply air to the aerosol generating rod 1.

[0057] In one embodiment, please refer to Figure 3 The aerosol generating device includes a receiving cup 7, a receiving cavity 21 located within the receiving cup 7, a heating needle 3 inserted into the receiving cup 7, an external section 312 extending outside the receiving cup 7, and a temperature measuring element 4 located outside the receiving cup 7. In one embodiment, the aerosol generating device further includes a heating needle mounting base 8, with the external section 312 fixed to the heating needle mounting base 8.

[0058] In one embodiment, please refer to Figure 3 The air inlet 33 is located outside the receiving cup 7. The outer shell 2 has an outer shell 2 hole (not shown in the figure) that communicates with the outside. The air inlet 33 is connected to the outer shell 2 hole, so that external gas can enter the heating needle 3 through the outer shell 2 hole and the air inlet 33.

[0059] In one embodiment, please refer to Figure 3The aerosol generating device also includes a coil mounting sleeve 6 fixed in the outer casing 2, an induction coil 5 wound around the outer periphery of the coil mounting sleeve 6, and a receiving cup 7 extending into the coil mounting sleeve 6. In one embodiment, please refer to... Figure 3 The aerosol generating device also includes a power supply 9, which supplies power to the induction coil 5.

[0060] The above examples illustrate this application only to aid understanding and are not intended to limit its scope. Those skilled in the art to which this application pertains can make various simple deductions, modifications, or substitutions based on the ideas presented.

Claims

1. A heat generating needle assembly, characterized by, The heating needle comprises a needle body and a temperature measuring and heat conducting layer on the outer surface of the needle body, the needle body comprises an insertion section and an external section, the insertion section is used for inserting into an aerosol generating rod to heat the aerosol generating rod, and the external section is used for externally arranging outside the aerosol generating rod; the temperature measuring and heat conducting layer comprises an insertion section part and an external section part; the insertion section part is in heat conducting contact with the external section, and the external section part is in contact with the external section; and a temperature measuring element connected to the external section part, used for measuring the temperature of the temperature measuring and heat conducting layer. The heat conductivity coefficient of the temperature measuring and heat conducting layer is greater than that of the needle body.

2. The heat generating needle assembly of claim 1, wherein, The insertion section part covers a part of the outer surface of the insertion section, and the external section part covers a part of the external section.

3. The heat generating needle assembly of claim 1, wherein, The temperature measuring element is welded to the external section part.

4. The heat generating needle assembly according to any one of claims 1 to 3, wherein The temperature measuring element is a thermocouple.

5. The heat generating needle assembly of any one of claims 1-3, wherein, The heating needle is a hollow structure, the heating needle has an air inlet hole and an air outlet hole, the air inlet hole is arranged on the external section, the air outlet hole is arranged on the insertion section, and an air flow channel is formed in the heating needle to communicate the air inlet hole and the air outlet hole.

6. The heat generating needle assembly of any one of claims 1-3, wherein, The heating needle further comprises a protective layer, the protective layer at least covers the connection between the temperature measuring element and the external section part.

7. The heat generating needle assembly of any one of claims 1-3, wherein, The aerosol generating device comprises a housing and the heating needle assembly as claimed in any one of claims 1-7, the housing has a containing cavity for inserting the aerosol generating rod, and the insertion section is arranged in the containing cavity.

8. An aerosol-generating device comprising: The aerosol generating device comprises an induction coil, and the heating needle is a magnetic induction heating needle used for heating in an alternating magnetic field of the induction coil.

9. The aerosol-generating device of claim 8, wherein, The aerosol generating device comprises a containing cup, the containing cavity is arranged in the containing cup, the heating needle is inserted into the containing cup, the external section extends out of the containing cup, and the temperature measuring element is arranged outside the containing cup. 10.The aerosol-generating device of claim 8, wherein, ​

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