Temperature measuring device and aerosol generating equipment

Abstract

This invention discloses a temperature measuring device and an aerosol generating apparatus, comprising a magnetic field generator, a heating component, and a PCB board. The magnetic field generator generates a changing magnetic field; the heating component is partially disposed within the magnetic field and in contact with the aerosol substrate; the PCB board is connected to both the magnetic field generator and the heating component. The heating component generates heat under the influence of the magnetic field to heat the aerosol substrate. The heating component has a positive or negative temperature coefficient of resistance, and the PCB board determines the temperature of the heating component based on its resistance value when heated. This invention employs a temperature measuring device with a positive or negative temperature coefficient of resistance, i.e., directly measuring the resistance of the heating component and determining its temperature based on its temperature coefficient of resistance. This method yields higher temperature accuracy, and the overall structure of the temperature measuring device is simpler and more integrated, thereby reducing product size and production costs.

Description

Technical Field

[0001] This invention belongs to the field of aerosol generation technology, and particularly relates to a temperature measuring device and aerosol generation equipment. Background Technology

[0002] Aerosol generating equipment uses a non-combustible heating method to bake an aerosol substrate at high temperatures, thereby producing aerosols for users to inhale. Typically, the temperature of the aerosol substrate needs to be monitored during the heating process to control the temperature in subsequent heating stages.

[0003] Existing aerosol generating equipment typically uses temperature sensors to measure the temperature of the heating element. However, this method has low accuracy and a complex overall structure with low integration. Summary of the Invention

[0004] This invention provides a temperature measuring device and an aerosol generating device, aiming to solve the problems of low temperature measuring accuracy, complex overall structure, and low integration in the above-mentioned technical solutions.

[0005] Firstly, to solve the above-mentioned technical problems, the present invention provides a temperature measuring device, comprising:

[0006] A magnetic field generator is used to produce changing magnetic fields.

[0007] A heating element, part of which is disposed in the magnetic field, and part of the heating element is in contact with the aerosol substrate;

[0008] The PCB board is connected to the magnetic field generator and the heating assembly, respectively.

[0009] The heating component generates heat under the action of the magnetic field to heat the aerosol substrate. The heating component has a positive or negative temperature coefficient of resistance. The PCB board determines the temperature of the heating component by the resistance value of the heating component when it heats up.

[0010] Furthermore, the heating component includes a heating element and a conductive element. One end of the conductive element is electrically connected to one end of the heating element, and the other end is connected to the PCB board. The other end of the heating element is in contact with the aerosol substrate.

[0011] Furthermore, the heating element includes a main body and a contact portion connected to each other. One end of the main body is connected to the conductive element, and the other end extends into a contact portion, which contacts the aerosol substrate.

[0012] Furthermore, the heating element has a positive or negative temperature coefficient of resistance, and the conductive element includes two pins, both of which are connected to one end of the main body and inserted into the PCB board.

[0013] Furthermore, a notch is provided at the connection between the main body and the pin, the notch extends toward the contact portion and divides the main body into two parts, each part being connected to a corresponding pin.

[0014] Furthermore, the conductive element includes two temperature-sensitive wires, which are disposed opposite to each other on the surface of the main body.

[0015] Furthermore, the magnetic field generator includes a magnetic conductor and an electromagnetic coil. The magnetic conductor includes a magnetic field section and a magnetic sensing section. The magnetic field section is arranged around the heating element, and the magnetic sensing section is connected to the electromagnetic coil.

[0016] Furthermore, the magnetic field unit includes a receiving cavity, one end of which has an opening, the main body is placed inside the receiving cavity, the contact portion protrudes from the opening, and the other end of the receiving cavity is connected to the magnetic sensing unit.

[0017] Furthermore, the heating element is characterized in that it is sheet-shaped or columnar.

[0018] Furthermore, it includes a power supply device and a temperature measuring device as described in any one of claims 1-9, wherein the power supply device is used to provide alternating current to the magnetic field generator and a detection voltage to the heating component.

[0019] Secondly, the present invention also provides an aerosol generating device, including a power supply device and the aforementioned temperature measuring device, wherein the power supply device is used to provide alternating current to the magnetic field generator and to provide detection voltage to the heating component.

[0020] The temperature measuring device and aerosol generating equipment of the present invention employ a temperature measuring device with a positive or negative resistance temperature coefficient, that is, by directly measuring the resistance of the heating component and determining its temperature based on its resistance temperature coefficient; the temperature obtained in this way has higher accuracy, and the structure of the entire temperature measuring device is simpler and more integrated, thereby reducing the size of the product and lowering production costs. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic cross-sectional view of the overall structure of an embodiment of the temperature measuring device of the present invention;

[0023] Figure 2 for Figure 1 A schematic diagram of one embodiment of the heating assembly shown in the figure;

[0024] Figure 3 for Figure 1 A schematic diagram of another embodiment of the heating component shown in the illustration;

[0025] Figure 4 This is a schematic cross-sectional view of the overall structure of another embodiment of the temperature measuring device of the present invention;

[0026] Figure 5 for Figure 4 A schematic diagram of one embodiment of the heating assembly shown in the figure;

[0027] Figure 6 for Figure 4 A schematic diagram of another embodiment of the heating component shown in the illustration;

[0028] Figure 7 for Figure 1 A schematic cross-sectional view of the magnetic field generator in the illustrated embodiment;

[0029] The markings in the diagram are as follows: 10, heating component; 11, heating element; 12, conductive element; 13, notch; 20, magnetic field generator; 21, magnetic field section; 22, magnetic sensing section; 23, electromagnetic coil; 30, PCB board; 40, power supply device; 111, contact section; 112, main body section. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are partial embodiments of the present invention, not embodiments of the entire unit. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] The directional terms used in this invention, such as "up," "down," "front," "back," "left," "right," "inner," "outer," and "center," are merely for reference to the accompanying drawings. Therefore, the directional terms used are for illustrating and understanding this invention, and not for limiting it. Furthermore, in the drawings, structures that are similar or identical are indicated by the same reference numerals.

[0032] See Figure 1This image shows a cross-sectional view of an embodiment of the temperature measuring device and aerosol generating equipment of the present invention. The temperature measuring device and aerosol generating equipment of the present invention include a magnetic field generator 20, a heating component 10, and a PCB board 30. The magnetic field generator 20 is used to generate a changing magnetic field; the heating component 10 is partially disposed in the magnetic field and partially contacts the aerosol substrate; the PCB board 30 is connected to both the magnetic field generator 20 and the heating component 10. The heating component 10 generates heat under the action of the magnetic field to heat the aerosol substrate. The heating component 10 has a positive or negative temperature coefficient of resistance. The PCB board 30 determines the temperature of the heating component 10 by measuring its resistance value when it heats up. It is understood that, utilizing the eddy current heating principle, the magnetic field generator 20 generates an alternating magnetic field. The heating component 10 itself is composed of conductors. When the heating component 10 is placed in the magnetic field, it can generate induced eddy currents and heat up. Furthermore, since the heating component 10 has a positive or negative temperature coefficient of resistance, its temperature can be determined by measuring the resistance of the heating component 10. The temperature obtained in this way is more accurate, and the entire temperature measuring device has a simpler structure and higher integration.

[0033] In this embodiment, the heating component 10 includes a heating element 11 and a conductive element 12. One end of the conductive element 12 is electrically connected to the heating element 11, and the other end is connected to the PCB board 30. The conductive element 12 or the heating element 11 has a positive or negative temperature coefficient of resistance. Specifically, the heating element 11 is placed in a magnetic field and is used to insert into the aerosol substrate to heat it from the inside. Since the aerosol substrate is usually elongated, the heating element 11 is also elongated in shape, preferably columnar or sheet-like. In this specific embodiment, the heating element 11 includes a main body 112 and a contact part 111. The end of the contact part 111, that is, the end inserted into the aerosol substrate, is pointed, which makes it easier for the heating element 11 to be inserted into the aerosol substrate. The main body 112 is the main body 112 excluding the contact part 111, and it is connected to the conductive element 12. The length of the heating element 11 affects the contact area with the aerosol substrate and the heating effect. Its overall length depends on the overall length of the aerosol substrate, so its length is not subject to too much restriction.

[0034] In this specific embodiment, the magnetic field generator 20 includes a magnetic conductor and an electromagnetic coil 23. The magnetic conductor includes a magnetic field section 21 and a magnetic sensing section 22. The magnetic field section 21 is disposed around the heating element 11, and the magnetic sensing section 22 is connected to the electromagnetic coil 23. More specifically, the magnetic field section 21 includes a receiving cavity with an opening at one end. The main body 112 is placed inside the receiving cavity, and the contact portion 111 protrudes from the opening. The other end of the receiving cavity is connected to the magnetic sensing section 22. More specifically, the magnetic field section 21 has the same shape as the heating element 11, and it has an annular sidewall surrounding the heating element 11, forming a receiving cavity for accommodating the heating element 11. The annular sidewall is disposed against the outer surface of the main body 112, and the contact portion 111 protrudes from the opening. An electromagnetic coil 23 is wound around the magnetic induction part 22 and connected to the magnetic field part 21, so that the magnetic field generated by the electromagnetic coil 23 is conducted to the magnetic field part 21 and acts on the heating element 11. At the same time, after the heating element 11 heats up, it can transfer heat to the side wall of the magnetic field part 21 and further heat the aerosol substrate. In other specific embodiments, the magnetic field part 21 can be indirectly arranged around the heating element 11, as long as it can form a magnetic field and act on the heating element 11.

[0035] In one specific embodiment, such as Figures 1 to 3 As shown, the heating element 11 has a positive or negative temperature coefficient of resistance. The heating element 11 generates heat under the influence of a magnetic field, and its resistance changes with temperature. At this time, the conductive element 12 is connected to one end of the main body 112, forming a circuit loop with the heating element 11. The PCB board 30 emits a detection voltage to measure the resistance of the heating element 11, thereby determining its temperature. In other embodiments of this specific example, the conductive element 12 includes two pins. A notch 13 is provided at the connection point between the heating element 11 and the two pins. The notch 13 extends towards the contact portion 111 and divides the main body 112 into two symmetrical parts, each part corresponding to a pin. The notch 13 reduces the cross-sectional area of ​​the current in the heating element 11 and increases the current path distance, thereby improving the resistance detected by the heating element 11 and thus improving the accuracy of the temperature detection result. Simultaneously, to facilitate smooth insertion of the contact portion 111 into the aerosol substrate for heating without affecting its operation, both pins are connected through the other end of the main body 112.

[0036] In another specific embodiment, such as Figures 4 to 6 As shown, the conductive element 12 includes two temperature-sensitive wires, which have a positive or negative temperature coefficient of resistance. The heating element 11 generates heat under the influence of a magnetic field. The heating element 11 is only used to generate heat and conduct the temperature to the temperature-sensitive wires. The temperature-sensitive wires are respectively located on both sides of the heating element 11, and the temperature-sensitive wires themselves can change with the temperature. The temperature is obtained by measuring the resistance of the temperature-sensitive wires, and the temperature of the heating element 11 is further determined.

[0037] On the other hand, the present invention also provides an aerosol generating device, which includes a power supply device 40, a cavity and the aforementioned temperature measuring device. The cavity is used to contain the aerosol substrate, and the heating element 11 is partially placed inside the cavity. The power supply device 40 is used to provide alternating current to the magnetic field generator 20 and to provide detection voltage to the heating component 10.

[0038] The temperature measuring device and aerosol generating equipment of the present invention employ a temperature measuring device with a positive or negative temperature coefficient of resistance, that is, by directly measuring the resistance of the heating component and determining its temperature based on its temperature coefficient of resistance. The temperature obtained in this way has higher accuracy, and the structure of the entire temperature measuring device is simpler and more integrated, thereby reducing the size of the product and lowering production costs. The heating element or conductive element has a positive or negative temperature coefficient of resistance, and a notch is provided at the connection between the heating element and the two pins. The notch reduces the cross-sectional area of ​​the current in the heating element and increases the current path distance, thereby improving the resistance detected by the heating element and thus improving the accuracy of the temperature detection results.

[0039] Understandably, the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A temperature measuring device, characterized by, The application relates to a temperature measuring device, comprising: a magnetic field generator for generating a changing magnetic field; a heating assembly arranged at least partially in the magnetic field, the heating assembly being in contact with an aerosol substrate; a PCB board connected with the magnetic field generator and the heating assembly respectively; wherein the heating assembly generates heat under the action of the magnetic field to heat the aerosol substrate, the heating assembly has a positive or negative temperature coefficient of resistance, and the PCB board determines the temperature of the heating assembly through the resistance value of the heating assembly when the heating assembly generates heat; the heating assembly comprises a heating element and a conductive element, one end of the conductive element is electrically connected with one end of the heating element, and the other end of the conductive element is connected with the PCB board; the other end of the heating element is in contact with the aerosol substrate; the heating element comprises a main body part and a contact part connected with each other, one end of the main body part is connected with the conductive element, and the other end of the main body part extends to a contact part, and the contact part is in contact with the aerosol substrate; the heating element has a positive or negative temperature coefficient of resistance, the conductive element comprises two pins, and the two pins are connected with one end of the main body part and are inserted into the PCB board; a notch is arranged at the connection position of the main body part and the pin, the notch extends to the contact part and divides the main body part into two parts, and each part is connected with one pin.

2. The temperature measuring device according to claim 1, characterized in that the conductive element comprises two temperature-sensitive wires, and the two temperature-sensitive wires are arranged on the surface of the main body part in opposite directions.

3. The temperature measuring device according to claim 1, wherein the magnetic field generator comprises a magnetic conductive element and an electromagnetic coil, the magnetic conductive element comprises a magnetic field part and a magnetic induction part, the magnetic field part surrounds the heating element, and the magnetic induction part is connected with the electromagnetic coil.

4. The temperature measuring device according to claim 3, characterized in that the magnetic field part comprises a containing cavity, one end of the containing cavity is provided with an opening, the main body part is arranged in the containing cavity, the contact part is exposed from the opening, and the other end of the containing cavity is connected with the magnetic induction part.

5. The temperature measuring device according to claim 3, wherein the heating element is in the shape of a sheet or a column.

6. An aerosol generating device, characterized in that, The application further relates to a power supply device and the temperature measuring device, the power supply device is used for providing an alternating current to the magnetic field generator and providing a detection voltage to the heating assembly.

Images