Atomization device and temperature difference power generation circuit thereof

Abstract

The utility model discloses a kind of atomization equipment and its thermoelectric power generation circuit, thermoelectric power generation circuit includes thermoelectric power generation module and boost module, the hot end of thermoelectric power generation module and the outer surface of heating pipe contact, the cold end of thermoelectric power generation module connects the one end of metal piece, the other end of metal piece is located in the air passage that is communicated with the air inlet of atomization equipment, thermoelectric power generation module is used to export first voltage according to the temperature difference of hot end and cold end. The input end of boost module is connected with the voltage output end of the thermoelectric power generation module, for increasing first voltage to second voltage, and second voltage is output to energy storage module, to charge the energy storage module. The technical scheme not only improves the energy utilization efficiency of system, but also can reduce the invalid conduction of heating area heat to shell, inhibit local overheating, improve user touch feeling and equipment safety, to realize energy-saving, efficient, intelligent atomization experience.

Description

Technical Field

[0001] This utility model relates to the field of atomizing equipment technology, and in particular to an atomizing device and its thermoelectric power generation circuit. Background Technology

[0002] Existing atomizing devices typically include a heating element, a liquid storage tank, and control circuitry. The heating element heats and atomizes the aerosol matrix. During the heating process, the heating element generates a significant amount of heat, some of which is used for atomization, while the remaining heat is dissipated into the surrounding environment through conduction and radiation. This inefficient use of heat not only reduces energy efficiency but may also cause localized overheating of the casing, negatively impacting the user experience. Utility Model Content

[0003] This utility model provides an atomizing device and its thermoelectric power generation circuit to solve the above-mentioned technical problems.

[0004] A first aspect of this utility model provides a thermoelectric power generation circuit for an atomizing device, the atomizing device including a heating element and an energy storage module, the thermoelectric power generation circuit including: The thermoelectric power generation module has its hot end in contact with the outer surface of the heating tube, and its cold end connected to one end of a metal component. The other end of the metal component is located in an air channel connected to the air inlet of the atomizing device. The thermoelectric power generation module is used to output a first voltage based on the temperature difference between the hot end and the cold end. A boost module, whose input terminal is connected to the voltage output terminal of the thermoelectric generator module, is used to boost the first voltage to a second voltage and output the second voltage to the energy storage module to charge the energy storage module.

[0005] Optionally, thermally conductive silicone grease is provided between the hot end of the thermoelectric generator module and the outer surface of the heating tube.

[0006] Optionally, the thermoelectric power generation module and the heating tube are fixedly connected by bolts or spring clamps.

[0007] Optionally, a heat-resistant structure is provided around the hot end of the thermoelectric power generation circuit, and the heat-resistant structure covers the heating tube.

[0008] Optionally, the heat-insulating structure is a ceramic fiber or an asbestos pad.

[0009] Optionally, the boost module includes a boost chip, an inductor, a first feedback resistor, and a second feedback resistor; The voltage input terminal of the boost chip is connected to the first voltage terminal of the thermoelectric power generation module and one end of the inductor, respectively. The conversion terminal of the boost chip, the other end of the inductor, and one end of the first feedback resistor are connected together to form the first output terminal of the boost module. The sampling feedback terminal of the boost chip is connected to the other end of the first feedback resistor and one end of the second feedback resistor, respectively. The ground terminal of the boost chip, the second voltage terminal of the thermoelectric power generation module, and the other end of the second feedback resistor are connected together to form the second output terminal of the boost module.

[0010] Optionally, the boost module further includes a first capacitor, a second capacitor, and a fourth capacitor; One end of the first capacitor is connected to the first voltage terminal of the thermoelectric power generation module, and the other end of the first capacitor is connected to the second voltage terminal of the thermoelectric power generation module. One end of the second capacitor is connected to the first voltage terminal of the thermoelectric power generation module, and the other end of the second capacitor is connected to the second voltage terminal of the thermoelectric power generation module. One end of the fourth capacitor is connected to one end of the first feedback resistor, and the other end of the fourth capacitor is connected to the other end of the second feedback resistor.

[0011] Optionally, the boost module further includes a Schottky diode, the anode of which is connected to the other end of the inductor, and the cathode of which is connected to one end of the first feedback resistor.

[0012] Optionally, the boost module further includes a first resistor and a third capacitor. The compensation terminal of the boost chip is connected to one end of the first resistor, the other end of the first resistor is connected to one end of the third capacitor, and the other end of the third capacitor is connected to the second voltage terminal of the thermoelectric power generation module.

[0013] A second aspect of this utility model provides an atomizing device, which includes the thermoelectric power generation circuit, heating tube, and energy storage module described in the first aspect.

[0014] The technical advantages of this invention are as follows: By incorporating a thermoelectric power generation circuit into the atomizing device, the waste heat generated by the heating element during operation is fully utilized to achieve heat recovery and electrical energy conversion. The hot end of the thermoelectric power generation module is in close contact with the outer surface of the heating element, while the cold end is connected to a metal component located within the air intake channel. The intake air enhances heat dissipation at the cold end, thereby creating a stable temperature difference between the hot and cold ends and achieving a stable voltage output. This voltage is then boosted by a boost module to charge the energy storage module, powering the device's control circuits, indicator lights, or sensors, reducing the load on the main battery, and improving the overall battery life. Compared to the direct heat loss in traditional atomizing devices, this technical solution not only improves the system's energy efficiency but also reduces ineffective heat transfer from the heating zone to the casing, suppresses localized overheating, improves user experience and device safety, thus achieving an energy-saving, efficient, and intelligent atomizing experience. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a thermoelectric power generation circuit for an atomizing device provided in Embodiment 1 of this utility model; Figure 2 This is a schematic diagram showing the positional relationship between the thermoelectric power generation circuit and the heating tube of an atomizing device according to Embodiment 1 of this utility model; Figure 3 This is a circuit diagram of a thermoelectric power generation circuit for an atomizing device provided in Embodiment 1 of this utility model; In the diagram: 101, Thermoelectric power generation module; 102, Boost module; 103, Energy storage module; 104, Heating element; 105, Metal component; 106, Air passage. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0018] It should be understood that this invention can be embodied in various forms and should not be construed as being limited to the embodiments set forth herein. Rather, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of this invention to those skilled in the art. In the drawings, for clarity, the dimensions of layers and regions, as well as their relative dimensions, may be exaggerated. The same reference numerals denote the same elements throughout.

[0019] It should be understood that when an element or layer is referred to as "on," "adjacent to," "connected to," or "coupled to" other elements or layers, it may be directly on, adjacent to, connected to, or coupled to other elements or layers, or there may be intervening elements or layers. Conversely, when an element is referred to as "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc., may be used to describe various elements, components, areas, layers, and / or portions, these elements, components, areas, layers, and / or portions should not be limited by these terms. These terms are only used to distinguish one element, component, area, layer, or portion from another element, component, area, layer, or portion. Therefore, without departing from the teachings of this utility model, the first element, component, area, layer, or portion discussed below may be referred to as the second element, component, area, layer, or portion.

[0020] To fully understand this utility model, detailed structures and steps will be presented in the following description to illustrate the technical solution proposed by this utility model. Preferred embodiments of this utility model are described in detail below; however, in addition to these detailed descriptions, this utility model may have other embodiments.

[0021] Example 1 This embodiment provides a thermoelectric power generation circuit for an atomizing device, such as... Figure 1 and Figure 2 As shown, the atomizing device includes a heating element 104 and an energy storage module 103, and the thermoelectric power generation circuit includes: Thermoelectric module 101 has its hot end in contact with the outer surface of heating tube 104, and its cold end connected to one end of metal part 105. The other end of metal part 105 is located in air channel 106 connected to air inlet of atomizing device. Thermoelectric module 101 is used to output a first voltage based on the temperature difference between hot end and cold end. The boost module 102, whose input terminal is connected to the voltage output terminal of the thermoelectric generator module 101, is used to boost the first voltage to a second voltage and output the second voltage to the energy storage module 103 to charge the energy storage module 103. The thermoelectric power generation module 101 converts the temperature difference between the outer surface of the heating tube 104 (high-temperature end) and the metal part 105 (low-temperature end) inside the air channel 106 into a DC voltage (first voltage). This serves as an energy source, providing input voltage for the subsequent boost module 102. The thermoelectric power generation module 101 includes, but is not limited to, the following structure: it may employ a thermoelectric generator (TEG) based on the Seebeck effect, such as a Bi2Te3 semiconductor material module. The hot end is in close contact with the outer wall of the heating tube 104 using thermal grease or a metal plate to reduce thermal resistance. The cold end is fixedly connected to one end of the metal part 105 using screws, clips, or thermal adhesive. The other end of the metal part 105 is placed inside the air channel 106, which connects to the air inlet of the atomizing device, for heat dissipation using the intake airflow. The metal part 105 acts as the cold end heat sink of the thermoelectric power generation module 101, carrying away heat through the flowing air within the air channel 106, maintaining the temperature difference at the low-temperature end. Metal component 105 includes, but is not limited to, the following structures: made of aluminum alloy or copper sheet with high thermal conductivity; surface can be augmented with heat dissipation fins to improve air convection heat dissipation efficiency; shape can be designed as ring, sheet, or mesh to ensure smooth airflow. Boost module 102 boosts the low voltage output from thermoelectric generator module 101 (e.g., from tens to hundreds of millivolts to a usable voltage) to charge energy storage module 103. Ultra-low startup voltage DC-DC boost circuit (e.g., using LTC3108, BQ25504, or a bootstrap circuit based on synchronous boost topology) may include input filter capacitor, boost inductor, MOSFET, rectifier diode, and output filter capacitor, and may also feature maximum power point tracking (MPPT) to improve thermoelectric power generation efficiency. The energy storage module 103 stores the electrical energy output by the boost module 102 and supplies it to the internal control system, sensors, or auxiliary functions of the atomizing device. The energy storage module 103 can be a supercapacitor (e.g., 1 to 10F, low internal resistance, high cycle life) or a small rechargeable lithium battery (e.g., Li-ion, LiFePO4) with a charging management chip. The output terminal can be connected to a voltage regulator module to supply power to the load.

[0022] The working principle of this embodiment is as follows: when the heating tube 104 is heated, the temperature of its outer wall rises, the hot end of the thermoelectric generator module 101 heats up, while the cold end cools down by contacting the cold air in the air channel 106 through the metal part 105, forming a temperature difference and generating a first voltage; the boost module 102 boosts the voltage and charges the energy storage module 103, thereby realizing the recovery of electrical energy by waste heat during the heating process of the atomizing device.

[0023] As an example, the hot end of the thermoelectric generator module 101 is in close contact with the outer surface of the heating tube 104 and is fixed with thermal grease. The cold end is connected to a metal component 105, which is located in an air channel 106 communicating with the air inlet of the atomizing device, utilizing airflow for heat dissipation. The thermoelectric generator module 1013 uses a Bi2Te3 thermoelectric generator, capable of generating approximately 100~300mV DC voltage when the temperature difference is ≥30℃. The input terminal of the boost module 102 is connected to the output terminal of the thermoelectric generator module 101, employing an ultra-low start-up voltage DC-DC boost chip (such as LTC3108), with a start-up voltage as low as 20mV and an output voltage that can be set to 3.3V. The output terminal of the boost module 102 is connected to an energy storage module 103, which uses a 5F supercapacitor to store electrical energy and power the low-power sensors and control circuits of the atomizing device.

[0024] The technical advantages of this embodiment are as follows: This technical solution, by setting up a thermoelectric power generation circuit in the atomizing device, fully utilizes the waste heat generated by the heating tube during operation to achieve heat recovery and electrical energy conversion. The hot end of the thermoelectric power generation module is in close contact with the outer surface of the heating tube, and the cold end is connected to a metal part located in the air intake channel. The intake cold air enhances the heat dissipation of the cold end, thereby forming a stable temperature difference between the hot and cold ends and achieving a stable voltage output. In conjunction with a boost module, this voltage is boosted to charge the energy storage module, which can power the device's control circuit, indicator lights, or sensors, reducing the load on the main battery and improving the overall battery life. Compared to the direct dissipation of waste heat in traditional atomizing devices, this technical solution not only improves the system's energy utilization efficiency but also reduces the ineffective conduction of heat from the heating zone to the shell, suppresses local overheating, improves user feel and device safety, thereby achieving an energy-saving, efficient, and intelligent atomizing experience.

[0025] In one implementation, thermally conductive silicone grease is provided between the hot end of the thermoelectric generator module 101 and the outer surface of the heating tube 104.

[0026] Thermal grease, a paste-like material with high thermal conductivity and good insulation properties, is applied between the hot end of the thermoelectric generator module 101 and the outer surface of the heating tube 104. It fills the microscopic unevenness and gaps at the contact surface, reducing air thermal resistance and significantly lowering contact thermal resistance, thereby improving the efficiency of heat transfer from the heating tube 104 to the thermoelectric generator module 101. This material also maintains good stability under temperature changes and thermal cycling conditions, preventing a decrease in contact performance due to thermal expansion and contraction.

[0027] As an example, thermally conductive silicone grease is applied between the hot end of the thermoelectric generator module 101 and the outer surface of the heating tube 104. The thermally conductive silicone grease is a high-performance thermally conductive and insulating silicone grease material with a thermal conductivity greater than 3 W / m·K and a dielectric strength not less than 10 kV / mm. During assembly, after cleaning the outer surface of the heating tube 104, a layer of thermally conductive silicone grease with a thickness of 0.05 to 0.2 mm is evenly applied to the contact surface of the hot end. Then, the thermoelectric generator module 101 is tightly pressed onto the outer surface of the heating tube 104 using elastic clamps or clamps, ensuring appropriate contact pressure (0.2 to 0.5 MPa) to fully fill the tiny gaps in the contact surface with the thermally conductive silicone grease. This structure effectively improves heat transfer efficiency during atomization, ensuring that the thermoelectric generator module 101 achieves a higher temperature difference, thereby improving power generation efficiency and output power.

[0028] The technical effect of this embodiment is that by providing thermally conductive silicone grease between the hot end of the thermoelectric generator module 101 and the outer surface of the heating tube 104, the contact thermal resistance between the two can be significantly reduced, the efficiency of heat transfer from the heating tube 104 to the thermoelectric generator module 101 can be improved, thereby obtaining a larger temperature difference under the same working conditions, improving the output voltage and power generation of the thermoelectric generator module 101, and enhancing the energy conversion efficiency and power supply stability of the entire thermoelectric generator circuit.

[0029] In one implementation, the thermoelectric power generation module 101 and the heating tube 104 are fixedly connected by bolts or spring clamps.

[0030] Bolts or spring clamps are used to firmly press the thermoelectric generator module 101 onto the outer surface of the heating tube 104, providing stable and uniform contact pressure. This prevents loosening or displacement of the contact due to vibration, thermal expansion and contraction, or external impact, thereby maintaining low contact thermal resistance and high thermal conductivity. Bolt fixing is suitable for applications with sufficient structural space and requiring long-term stable clamping force. It can be used with a metal pressure plate to press the thermoelectric generator module 101 against the heating tube 104. Spring clamp fixing utilizes elastic elements to automatically compensate for dimensional changes caused by temperature variations, making it suitable for applications with frequent thermal cycling or minor deformation, and maintaining a constant clamping force. During assembly, thermally conductive silicone grease is applied between the hot end of the thermoelectric generator module 101 and the outer surface of the heating tube 104. Then, a metal clamp is used to press the thermoelectric generator module 101 against the heating tube 104. Both ends of the metal clamp are connected to a bracket with bolts, and the bolts are tightened to provide the required clamping force. Alternatively, a spring clamp structure can be used, with the two arms of the spring clamp sleeved around the outer circumference of the heating tube 104, so that the spring force presses the thermoelectric generator module 101 against the heating tube 104. This fixing method ensures a firm installation, facilitates subsequent disassembly and maintenance, and maintains stable thermal contact performance during equipment operation.

[0031] The technical advantages of this embodiment are as follows: by fixing the thermoelectric power generation module 101 with bolts or spring clamps, a stable and uniform contact pressure can be maintained during long-term operation and multiple thermal cycles, avoiding the increase of thermal resistance, ensuring that heat is efficiently transferred to the thermoelectric power generation module 101, improving the utilization rate of temperature difference and power generation efficiency, while improving assembly reliability and maintenance convenience.

[0032] In one implementation, a heat-resistant structure is provided around the hot end of the thermoelectric power generation circuit, and the heat-resistant structure covers the heating tube 104.

[0033] The main function of the heat-insulating structure is to inhibit heat conduction from the hot end along the heating tube 104 or the surrounding structure to the vicinity of the cold end, reducing the thermal effect between the hot and cold ends, thereby maintaining a large temperature difference ΔT. The heat-insulating structure typically uses materials with low thermal conductivity, high temperature resistance, and certain insulation properties, such as aerogel felt, ceramic fiber cloth, high-temperature resistant silicone rubber insulation pads, and asbestos pads.

[0034] As an example, a layer of aerogel insulation felt with a thickness of 2 to 5 mm is wrapped around the heating tube 104, covering the intermediate transition area extending from the hot end to the cold end of the thermoelectric module 101, forming a thermal barrier. The heat-insulating structure is fixed to the outer surface of the heating tube 104 by high-temperature resistant tape or metal clips, ensuring that it does not shift or fall off under long-term high temperature and vibration conditions. This structure can block part of the heat conduction along the outer wall of the heating tube 104 towards the cold end, reducing the temperature rise at the cold end, thereby maintaining a larger temperature difference between the hot and cold ends.

[0035] The technical effect of this embodiment is that by setting a heat-resistant structure covering the heating tube 104 between the hot end and the cold end, ineffective heat transfer can be effectively reduced, the temperature rise rate of the cold end can be reduced, a higher temperature difference driving force can be maintained, the output power and conversion efficiency of the thermoelectric power generation module 101 can be improved, and the power supply performance can be stabilized during long-term operation of the equipment.

[0036] As one implementation method, the cold-end metal component of the thermoelectric generator module is further optimized to have a heat dissipation enhancement structure. Specifically, it includes the following forms: 1. Heat dissipation fin structure: The surface of the cold-end metal part 105 is machined into sheet-like or needle-like heat dissipation fins, such as an array of aluminum alloy fins with a thickness of 0.5 to 1.5 mm. The fin spacing is set to 1 to 3 mm to ensure smooth airflow within the air channel 106. The fin arrangement direction is consistent with the airflow direction to maximize convective heat transfer efficiency.

[0037] 2. Porous / Honeycomb Structure: The cold-end metal part 105 can be integrally fabricated as a honeycomb or mesh structure with a pore size of 0.5 to 2 mm, and the material is copper or aluminum with good thermal conductivity. When air flows in the channels, the contact area with the metal surface increases significantly, enhancing heat transfer.

[0038] 3. Surface Coating Treatment: A black oxide layer or a nano-heat dissipation coating is sprayed onto the surface of the metal part 105 to improve its infrared radiation heat dissipation capability. The coating thickness can be controlled between 10 and 50 μm to ensure that it does not affect the thermal conductivity of the metal.

[0039] The cold-end metal component 105 is fixed in the air channel 106 by bolts or clips, and is positioned close to the air inlet to ensure a continuous flow of cold air. The heat dissipation fins or honeycomb structure are oriented in the direction of airflow to avoid airflow obstruction.

[0040] The technical advantage of this embodiment is that the enhanced heat dissipation structure significantly improves the convective and radiative heat transfer efficiency between the cold end and the air. Under the same heating power conditions, the cold end temperature drops by 2 to 5°C, resulting in a larger temperature difference ΔT between the hot and cold ends. Taking the Bi2Te3 thermoelectric module as an example, when the temperature difference increases from 30°C to 35°C, the output voltage can increase from 200mV to approximately 250mV, increasing the power generation by more than 20%. This further ensures stable output of the thermoelectric power generation module 101 under different operating conditions, providing more efficient charging for the energy storage module 103.

[0041] In one implementation, the thermoelectric power generation circuit of the atomizing device adopts a multi-point thermoelectric power generation structure. Multiple thermoelectric power generation modules 101 are arranged at different positions on the outer wall of the heating tube to further improve power generation efficiency and energy recovery capability. Two or more thermoelectric power generation modules 101 are evenly arranged in the circumferential direction of the heating tube 104, for example, symmetrically distributed at 120° or 180°. The hot end of each thermoelectric power generation module 101 is in close contact with the outer wall of the heating tube 104, while the cold ends are respectively connected to multiple metal parts 105, which extend into the air channel 106. The output terminals of each thermoelectric power generation module 101 can be connected in parallel to the input terminal of the boost module 102 to improve the total current output capability. Alternatively, the modules can first integrate their power through a power combining circuit before being fed into the boost module 102 to ensure input voltage stability. The cold-end metal parts 105 are placed at different positions in the air channel 106 to utilize the temperature difference along the airflow path and avoid thermal interference between the cold ends of multiple modules. The metal component 105 can be designed in different shapes, such as sheet-like, fin-like, or mesh-like, to further improve heat dissipation efficiency. Multiple thermoelectric modules 101 are fixed to the outer surface of the heating tube 104 by spring clamps or metal clamps, and thermal grease is applied to the contact surface to reduce thermal resistance. The cold-end metal component 105 is fixed inside the air channel 106 by an independent bracket to ensure stable heat dissipation under airflow impact.

[0042] The technical advantages of this implementation are as follows: a single thermoelectric generator module produces 200mV voltage and 20mA current at ΔT=30℃. Multiple modules connected in parallel can significantly increase the current and overall power. Under actual testing conditions, three parallel thermoelectric generator modules can increase the total output power to 2.5 to 3 times that of a single module. Since the temperature of the heating element's outer wall may be uneven, multi-point arrangement can balance temperature difference acquisition, avoiding a decrease in power generation efficiency due to insufficient local temperature. Multiple cold-end heat sinks are distributed at different locations in the air channel, reducing thermal interference and maintaining stable temperature difference output. Multi-point thermoelectric generation can power more low-power functions, such as indicator lights, Bluetooth modules, and sensor arrays, enabling low-power self-powering of the device. Under different operating conditions (such as low ambient temperature or low-power atomization mode), sufficient electrical energy can still be input to the energy storage module 103, improving system reliability.

[0043] As one implementation method, such as Figure 3 As shown, the boost module 102 includes a boost chip, an inductor L1, a first feedback resistor RV1, and a second feedback resistor R2; The voltage input terminal of the boost chip is connected to the first voltage terminal of the thermoelectric power generation module 101 and one end of the inductor L1, respectively. The conversion terminal of the boost chip, the other end of the inductor L1, and one end of the first feedback resistor RV1 are connected together to form the first output terminal of the boost module 102. The sampling feedback terminal of the boost chip is connected to the other end of the first feedback resistor RV1 and one end of the second feedback resistor R2, respectively. The ground terminal of the boost chip, the second voltage terminal of the thermoelectric power generation module 101, and the other end of the second feedback resistor R2 are connected together to form the second output terminal of the boost module 102.

[0044] The boost chip can be an LM2577S-ADJ. Its voltage input pin, VIN, receives the output (low-voltage DC) from the first voltage terminal of the thermoelectric generator module 101, typically ranging from 3.5V to 40V. The ground pin, GND, connects to the system common ground (the second voltage terminal of the thermoelectric generator module 101) and serves as a chip potential reference. The switching pin, Switch, connects to inductor L1, controlling the MOSFET's on / off state to charge and discharge energy in inductor L1, thus boosting the voltage. The feedback pin, FB, provides the internal reference voltage of 1.23V. By connecting the first feedback resistor RV1 and the second feedback resistor R2, the output voltage is sampled, and the control loop adjusts the switch duty cycle based on this voltage to achieve stable output.

[0045] In this circuit, inductor L1 stores energy. One end is connected to the VIN input, and the other end is connected to the Switch node of the boost chip. The inductance value is typically selected in the range of 4.7μH to 47μH, depending on the input voltage, output voltage, current, and switching frequency. When the switch is on, inductor L1 stores energy; when the switch is off, inductor L1 releases the stored energy, which, when superimposed with the input voltage, provides a higher voltage to the output. The first feedback resistor RV1 and the second feedback resistor R2 form a voltage divider sampling network from the output to the feedback voltage detection pin. These two resistors form a voltage divider network used to set the output voltage. The output voltage is calculated as Vout = 1.23V × (1 + RV1 / R2). By adjusting the ratio of the first feedback resistor RV1 and the second feedback resistor R2, different output voltages can be obtained. The power input pin VIN of the boost chip is connected to the first voltage terminal of the thermoelectric generator module 101 and one end of inductor L1, respectively, to receive the first voltage generated by the thermoelectric generator module 101 and power the internal circuitry of the chip.

[0046] The technical effect of this embodiment is that by reasonably connecting the boost chip, inductor and voltage divider feedback network, the boost module 102 can efficiently and stably boost the low voltage output by the thermoelectric power generation module 101, and at the same time has the output voltage sampling and feedback control function to stabilize the output voltage at the set value, effectively improving the power conversion efficiency of the thermoelectric power generation circuit and the stability of the load power supply, and ensuring the reliable operation of the system.

[0047] As one implementation method, such as Figure 3 As shown, the boost module 102 also includes a first capacitor C1, a second capacitor C2, and a fourth capacitor C4; one end of the first capacitor C1 is connected to the first voltage terminal of the thermoelectric power generation module 101, and the other end of the first capacitor C1 is connected to the second voltage terminal of the thermoelectric power generation module 101; one end of the second capacitor C2 is connected to the first voltage terminal of the thermoelectric power generation module 101, and the other end of the second capacitor C2 is connected to the second voltage terminal of the thermoelectric power generation module 101; one end of the fourth capacitor C4 is connected to one end of the first feedback resistor R1, and the other end of the fourth capacitor C4 is connected to the other end of the second feedback resistor R2.

[0048] The first capacitor, C1, is a filter capacitor, typically an electrolytic capacitor, such as a 100μF / 25V capacitor. It filters out ripple in the input voltage, making the voltage input to the chip more stable and reducing the impact of power supply noise on the circuit. The second capacitor, C2, generally uses a combination of an electrolytic capacitor and a ceramic capacitor, such as a 100μF / 50V electrolytic capacitor and a 0.1μF ceramic capacitor. Its function is to filter out high-frequency noise in the output voltage, making the output voltage smoother and more stable. The fourth capacitor, C4, is used to stabilize the sampling voltage divider node, suppress high-frequency noise from entering the feedback channel, improve loop response speed, and suppress output voltage oscillations and overshoot. It is usually a 10nF to 100nF ceramic capacitor, depending on the system bandwidth and the feedback voltage divider resistance.

[0049] The technical effect of this embodiment is that by setting the first capacitor C1, the second capacitor C2 and the fourth capacitor C4, not only can the ripple and noise in the output voltage of the thermoelectric generator module 101 be effectively filtered out and the working power supply of the boost chip be stabilized, but the output voltage can also be smoothed and the power supply quality of the system can be improved. At the same time, the high-frequency interference of the feedback loop is suppressed, and the voltage regulation control accuracy and response speed are enhanced, thereby improving the power conversion efficiency and stability of the entire boost system.

[0050] As one implementation method, such as Figure 3 As shown, the boost module 102 also includes a Schottky diode D1, the anode of which is connected to the other end of the inductor L1, and the cathode of which is connected to one end of the first feedback resistor RV1.

[0051] In this embodiment, a Schottky diode D1 is positioned between the inductor L1 and the output to provide a freewheeling path for the inductor during the off-state of the internal switch of the boost chip. When the internal switch is on, the inductor stores energy; when the switch is off, the energy released by the inductor L1 is conducted through the Schottky diode D1, guiding the current to the output terminal and the energy storage module 103. Preferably, the Schottky diode is a low forward voltage drop, high-frequency switching response device, such as SS14 (1A / 40V) or MBR0540 (0.5A / 40V), to reduce conduction losses and improve system efficiency. Its function is to prevent the back electromotive force generated by the inductor L1 from flowing back into the chip when the switch is off, while guiding the energy in the inductor L1 to the output terminal, thereby improving circuit efficiency.

[0052] The technical effect of this embodiment is that by setting a Schottky diode D1 in the boost module 102, a low-voltage drop freewheeling path can be provided for the inductor during the turn-off period of the boost chip, preventing the induced voltage from flowing back into the chip, protecting the internal switching transistor of the chip from reverse voltage damage, while improving energy transmission efficiency and output stability, and enhancing the overall conversion efficiency and reliability of the boost module 102.

[0053] As one implementation method, such as Figure 3 As shown, the boost module 102 also includes a first resistor R1 and a third capacitor C3. The compensation terminal of the boost chip is connected to one end of the first resistor R1, the other end of the first resistor R1 is connected to one end of the third capacitor C3, and the other end of the third capacitor C3 is connected to the second voltage terminal of the thermoelectric power generation module 101.

[0054] The first resistor R1 (compensation resistor) is used to set the gain slope of the system feedback loop, which helps to improve the phase margin and the system response speed. The third capacitor C3 (compensation capacitor) provides a low-frequency zero point, suppresses high-frequency noise, and prevents oscillations in the closed-loop system. The two are connected in series to form an RC network, giving the control loop appropriate frequency compensation characteristics, thereby achieving better system stability and dynamic performance. The boost chip has a compensation pin (COMP) for connecting to the external compensation network of the error amplifier to adjust the frequency response of the control loop. Specifically, the compensation pin is connected to one end of the first resistor R1, the other end of the first resistor R1 is connected to one end of the third capacitor C3, and the other end of the third capacitor C3 is connected to the second voltage terminal of the thermoelectric power generation module 101, i.e., ground. This structure forms a series RC compensation network. By adjusting the parameters of the first resistor R1 and the third capacitor C3, the error amplifier can obtain ideal frequency compensation characteristics, improve the phase margin and response speed of the entire boost module 102, and avoid high-frequency oscillations. In a practical implementation, the resistance of the first resistor R1 can be from 1kΩ to 10kΩ, and the capacitance of the third capacitor C3 can be from 1nF to 100nF. The specific values ​​can be determined according to the type of boost chip, the feedback voltage division ratio, and the system bandwidth requirements.

[0055] The technical advantage of this embodiment is that by connecting a resistor and a capacitor in series to the compensation pin of the boost chip to form a compensation network, the frequency response characteristics of the feedback control loop can be effectively adjusted, the phase margin and stability of the system can be enhanced, oscillations can be suppressed and dynamic response capabilities can be improved, so that the thermoelectric boost module 102 can achieve stable and reliable output control under different load changes and input fluctuations.

[0056] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A thermoelectric power generation circuit for an atomizing device, the atomizing device comprising a heating element and an energy storage module, characterized in that, The thermoelectric power generation circuit includes: The thermoelectric power generation module has its hot end in contact with the outer surface of the heating tube, and its cold end connected to one end of a metal component. The other end of the metal component is located in an air channel connected to the air inlet of the atomizing device. The thermoelectric power generation module is used to output a first voltage based on the temperature difference between the hot end and the cold end. A boost module, whose input terminal is connected to the voltage output terminal of the thermoelectric generator module, is used to boost the first voltage to a second voltage and output the second voltage to the energy storage module to charge the energy storage module.

2. The thermoelectric power generation circuit as described in claim 1, characterized in that, Thermal grease is provided between the hot end of the thermoelectric generator module and the outer surface of the heating tube.

3. The thermoelectric power generation circuit as described in claim 1, characterized in that, The thermoelectric power generation module and the heating tube are fixedly connected by bolts or spring clamps.

4. The thermoelectric power generation circuit as described in claim 1, characterized in that, A heat-resistant structure is provided around the hot end of the thermoelectric power generation circuit, and the heat-resistant structure covers the heating tube.

5. The thermoelectric power generation circuit as described in claim 4, characterized in that, The heat-insulating structure is a ceramic fiber or asbestos pad.

6. The thermoelectric power generation circuit as described in claim 1, characterized in that, The boost module includes a boost chip, an inductor, a first feedback resistor, and a second feedback resistor; The voltage input terminal of the boost chip is connected to the first voltage terminal of the thermoelectric power generation module and one end of the inductor, respectively. The conversion terminal of the boost chip, the other end of the inductor, and one end of the first feedback resistor are all connected to form the first output terminal of the boost module; The sampling feedback terminal of the boost chip is connected to the other end of the first feedback resistor and one end of the second feedback resistor, respectively. The ground terminal of the boost chip, the second voltage terminal of the thermoelectric generator module, and the other end of the second feedback resistor are all connected to form the second output terminal of the boost module.

7. The thermoelectric power generation circuit as described in claim 6, characterized in that, The boost module also includes a first capacitor, a second capacitor, and a fourth capacitor; One end of the first capacitor is connected to the first voltage terminal of the thermoelectric power generation module, and the other end of the first capacitor is connected to the second voltage terminal of the thermoelectric power generation module. One end of the second capacitor is connected to the first voltage terminal of the thermoelectric power generation module, and the other end of the second capacitor is connected to the second voltage terminal of the thermoelectric power generation module. One end of the fourth capacitor is connected to one end of the first feedback resistor, and the other end of the fourth capacitor is connected to the other end of the second feedback resistor.

8. The thermoelectric power generation circuit as described in claim 6, characterized in that, The boost module also includes a Schottky diode, the anode of which is connected to the other end of the inductor, and the cathode of which is connected to one end of the first feedback resistor.

9. The thermoelectric power generation circuit as described in claim 6, characterized in that, The boost module also includes a first resistor and a third capacitor. The compensation terminal of the boost chip is connected to one end of the first resistor, the other end of the first resistor is connected to one end of the third capacitor, and the other end of the third capacitor is connected to the second voltage terminal of the thermoelectric power generation module.

10. An atomizing device, characterized in that, The atomizing device includes the thermoelectric power generation circuit, heating tube, and energy storage module as described in any one of claims 1 to 9.

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