Power supply control device and electronic atomization equipment

Abstract

The utility model discloses a power supply control device and electronic atomization equipment. The power supply control device is used for supplying power to a heating element of an electronic atomizer. The power supply control device comprises an alternating current power supply and a controller, the alternating current power supply is used for outputting first alternating current to a heating element of the electronic atomizer, and the controller is used for controlling electrical parameters of the first alternating current to change heating power of the heating element. The alternating current is used as the power supply of the heating element, and the heating power of the heating element is changed by controlling the electrical parameters of the first alternating current, so that the heating power of the electronic atomizer is adjusted more quickly and accurately. Due to the fact that the high-frequency alternating current is used for supplying power, the electric energy conversion efficiency of the electronic atomization equipment is higher, the endurance time of the energy storage battery is prolonged, and the service life is further prolonged.

Description

Technical Field

[0001] This application relates to the field of electronic atomization technology, specifically to a power supply control device and an electronic atomization device. Background Technology

[0002] An electronic atomizing device is a device that can atomize liquids into aerosols. Related technologies include two types of electronic atomizing devices: heating atomization and vibration atomization. Heating atomization devices include a heating element that converts the liquid into an aerosol matrix. During the use of an electronic atomizer, the heating power of the heating element needs to be adjusted, for example, through voltage modulation, current modulation, and PWM (Pulse Width Modulation). Utility Model Content

[0003] The technical problem this application aims to solve is how to adjust the heating power of an electronic atomizer.

[0004] According to one embodiment, a power supply control device is provided for supplying electrical energy to an electronic atomizer, the electronic atomizer including a heating element, and the power supply control device including an AC power supply and a controller;

[0005] The AC power supply is used to output first AC power to the electronic atomizer, so as to use the first AC power as the power supply for the heating element.

[0006] The controller is connected to the AC power supply and is used to adjust the electrical parameters of the first AC power supply to change the heating power of the heating element; wherein the electrical parameters include frequency, peak value and / or effective voltage value.

[0007] In one embodiment, the AC power source includes an energy storage battery and an inverter;

[0008] The energy storage battery is connected to the inverter and is used to output a first DC power to the inverter.

[0009] The inverter is used to convert the first direct current into the first alternating current.

[0010] In one embodiment, the inverter is a half-bridge inverter circuit or a full-bridge inverter circuit;

[0011] The controller is connected to the inverter and is used to control the electrical parameters of the first AC power supply by controlling the inverter's inverter operating parameters; wherein, the inverter operating parameters include AC side technical parameters, which include output voltage, rated output current, frequency range and / or waveform.

[0012] In one embodiment, the controller is further configured to adjust the heat generation rate of the heating element by adjusting the frequency of the first alternating current.

[0013] In one embodiment, the frequency of the first alternating current is configured by the controller to be adjusted within the range of 1 kHz to 10 MHz.

[0014] In one embodiment, the waveform of the first alternating current is a square wave or a triangular wave.

[0015] One embodiment provides an electronic atomization device, including an electronic atomizer and a power supply control device as described above; the electronic atomizer includes:

[0016] A heating element is electrically connected to the power supply control device, and the equivalent resistance of the heating element changes in response to changes in the AC frequency of the power supply control device.

[0017] A liquid storage device is used to store the atomizing matrix, and the liquid storage device and the heating element are in liquid-conducting communication.

[0018] In one embodiment, the electronic atomizing device further includes an interaction module connected to the controller; the interaction module is used to respond to user input control commands to set the values ​​of the electrical parameters of the first AC power supply, and output the values ​​of the electrical parameters of the first AC power supply to the controller, so as to set or change the electrical parameters of the first AC power supply output by the AC power source.

[0019] In one embodiment, the interaction module includes an input unit and a display unit;

[0020] The input unit includes buttons and / or a touch screen for receiving the input control commands;

[0021] The display unit includes a display screen for displaying the values ​​of the electrical parameters of the first alternating current.

[0022] In one embodiment, the equivalent resistance of the heating element is no greater than 1 ohm.

[0023] The electronic atomizing device according to the above embodiment is powered by alternating current to supply power to the heating element, which makes the heating power adjustment faster and more precise. Attached Figure Description

[0024] Figure 1 This is a structural block diagram of a power supply control device in one embodiment;

[0025] Figure 2 This is a structural block diagram of an electronic atomizing device in one embodiment;

[0026] Figure 3 This is a schematic diagram of the structure of an electronic atomizing device in one embodiment.

[0027] Among them: 1-Power supply control device, 2-Electronic atomizer, 3-Interactive module, 10-AC power supply, 11-Storage battery, 12-Inverter, 20-Controller, 21-Heating element, 31-Input unit, 32-Display unit, 100-Electronic atomization device. Detailed Implementation

[0028] 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.

[0029] 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.

[0030] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0031] Among the technologies related to thermal power regulation in electronic atomizers, there are voltage regulation, current regulation, and pulse width modulation (PWM) methods. Voltage regulation controls the heating power of the heating element by adjusting the output voltage, but it has a slow response time and limited adjustment accuracy. Current regulation achieves power regulation through constant current control, but requires complex current detection and monitoring circuits. PWM controls power by adjusting the duty cycle of the power supply output; although it has a faster response time, it introduces electromagnetic interference. In this embodiment, by using alternating current to power the heating element of the electronic atomizer and changing the heating power of the heating element by controlling the electrical parameters of the alternating current, the thermal power regulation of the electronic atomizing device is faster and more precise.

[0032] This application provides a power supply control device, please refer to... Figure 1 This is a structural block diagram of a power supply control device 1 in one embodiment. The power supply control device 1 provides electrical energy to an electronic atomizer 2, which includes a heating element 21. The power supply control device 1 includes an AC power supply 10 and a controller 20. The AC power supply 10 outputs a first AC current to the electronic atomizer 2, which is used as the power supply for the heating element 21. The controller 20 is connected to the AC power supply 10 and is used to adjust the electrical parameters of the first AC current to change the heating power of the heating element 21. The electrical parameters of the first AC current include frequency, peak value, and / or effective voltage value. In the prior art, electronic atomizers use direct current (DC) to power the heating element. The disadvantage of DC power supply is that it is difficult to perform voltage boosting and bucking operations as easily as AC power, which to some extent makes it difficult to conveniently control the heating power of the heating element. Adjusting the electrical parameters of AC power is relatively easy to achieve; for example, the heating power of the heating element can be controlled by adjusting the electrical parameters of AC power, including frequency, peak value, and / or effective voltage value.

[0033] In one embodiment, the AC power supply of the power supply control device 1 is an external power source for the device, such as AC mains. The power supply control device includes a transformer module that steps down the AC mains voltage to a level suitable for application to the electronic atomizer, such as 4-5V. When in use, the user can connect the voltage input terminal of the power supply control device to the AC mains and the voltage output terminal to the atomizer. The AC mains voltage after being stepped down by the transformer module becomes a second AC power supply. The power supply control device connected to the AC mains provides charging power to the energy storage battery, thus enabling the electronic atomization device to support AC mains charging.

[0034] The controller 20 is used to adjust the frequency of the second AC current. Based on the skin effect of high-frequency AC current, when the frequency of the AC current increases, the equivalent resistance of the load in the AC circuit decreases. With the effective voltage of the AC current remaining constant, the heat generation rate of the heating element 21 increases. The heat generation rate refers to the effective resistive heat power of the heating element 21. In other words, by adjusting the frequency of the second AC current while keeping the effective voltage of the AC current constant, the heating power of the heating element 21 can be adjusted.

[0035] In one embodiment, the AC power supply 10 includes a storage battery 11 and an inverter 12. The storage battery 11 is connected to the inverter 12 and is used to output a first direct current to the inverter 11. The inverter 12 is used to convert the first direct current into a first alternating current, so as to use the first alternating current as a heating power source for the heating element 21.

[0036] The storage battery 11 and inverter 12 of the AC power supply 10 are used to output the first AC power. The AC power supply can be integrated with the power supply control device, for example... Figure 3In the illustrated embodiment, the power supply control device has the advantages of miniaturization and portability, and can be integrated with the interaction module 3 to facilitate circuit design and spatial structure optimization. For example, the input unit 31, display unit 32, and power supply control device can be mounted on the same circuit board.

[0037] In one embodiment, the inverter 12 is a half-bridge inverter circuit or a full-bridge inverter circuit. The controller 20 is connected to the inverter 12 and is used to control the electrical parameters of the first AC power supply by controlling the inverter operating parameters of the inverter 12. The inverter 12 operating parameters include AC side technical parameters, including output voltage, rated output current, frequency range, and / or waveform. Additionally, the inverter 12 operating parameters also include DC side technical parameters. In this embodiment, the first DC power supply is provided by the energy storage battery 11, and the electrical parameters of the first DC power supply are related to the output electrical parameters of the energy storage battery 11. Since the energy storage battery 11 does not change, the DC side technical parameters of the inverter 12 do not change. The half-bridge inverter circuit converts DC power into AC power by controlling the output of the upper and lower transistors of two inverter devices respectively. The circuit structure is simple, ensuring stable output waveform and low ripple. Therefore, it has advantages such as high efficiency and stability, low cost, low noise, convenient maintenance, simple circuit, and fewer components. Full-bridge inverter circuits are slightly more complex than half-bridge inverter circuits, but they have high power conversion efficiency, low energy loss, and can reduce the impact of power supply voltage fluctuations on output voltage.

[0038] In one embodiment, the controller 20 is further configured to adjust the heat generation rate of the heating element 21 by adjusting the frequency of the first alternating current, thereby achieving real-time adjustment of the heating power of the heating element. In one embodiment, the frequency of the first alternating current output by the AC power supply 10 is not less than 1 kHz. In another embodiment, the frequency of the first alternating current output by the AC power supply 10 is not greater than 10 MHz. In yet another embodiment, the frequency of the first alternating current is configured by the controller to be adjusted within the range of 1 kHz to 10 MHz. The skin effect mainly occurs when there is alternating current or alternating electromagnetic field in a conductor. This is because the direction and magnitude of the alternating current are constantly changing, resulting in uneven current distribution inside the conductor flowing through the alternating current. In particular, the skin effect is more likely to occur when high-frequency current flows through the conductor; that is, the higher the frequency, the more significant the skin effect. This is because the magnetic field change rate generated by the high-frequency current in the conductor is large, and the induced electromotive force is also large, thus forcing the current to be limited to the area near the outer surface of the conductor. Therefore, in this embodiment, the frequency of the first alternating current is set to be not less than 1 kHz. However, the higher the frequency of the inverter's output AC power, the higher the requirements for the electrical parameters of the inverter devices. Based on the switching frequency limitations of the inverter devices, the frequency of the first AC power in this embodiment is set to be no greater than 10MHz. In one embodiment, the waveform of the first AC power output by the AC power supply 10 is a square wave or a triangular wave. A square wave is the easiest to implement in AC power because the electrical signal driving the inverter is a square wave; therefore, in one embodiment of this application, the waveform of the first AC power is a square wave. Furthermore, the voltage waveform of a triangular wave AC power rises linearly and then falls linearly within one cycle. Due to the waveform characteristics of a triangular wave, the calculation of its effective voltage value is easier; the average power can be calculated using only simple geometric calculations. Therefore, when finely controlling the heating power of the heating element, the waveform of the first AC power is set to a triangular wave.

[0039] The principle of the electronic atomizer heating power adjustment disclosed in this application is described below through specific embodiments, including:

[0040] As the frequency of alternating current increases, the current density on a metal surface increases due to the "skin effect." The skin effect refers to the phenomenon where, when alternating current flows through a conductor, the current tends to flow towards the conductor's surface. With increasing frequency, the current becomes increasingly concentrated in the surface layer of the conductor. This effect causes the effective resistance of the conductor to change with frequency, thus increasing the current density at the conductor's surface. The skin effect formula is:

[0041] δ = (2 × ρ ÷ μ ÷ ω) 0.5 ;

[0042] Where δ is the skin depth, ρ is the resistivity of the conductor, μ is the permeability of the conductor, and ω = 2πf is the angular frequency. Skin depth is the depth at which the current density decreases to 1 / e (approximately 37%) of the current density at the conductor's surface. Skin depth is inversely proportional to the frequency f of the alternating current.

[0043] In the skin effect, frequency affects current distribution; as frequency increases, the skin depth decreases. This means that current is concentrated more within a thin layer on the surface of the conductor, rather than across the entire conductor cross-section. At higher frequencies, the current is concentrated in this thinner surface layer, so even if the total current remains constant, the current density within the surface layer increases. Therefore, by controlling the frequency of the output AC current, the skin effect is generated when the AC current passes through a heating element, altering the effective resistance of the heating element. As the frequency increases, the effective resistance of the heating element increases, and the heating power decreases. Conversely, as the frequency decreases, the effective resistance of the heating element decreases, and the heating power increases. For example, a first AC current with a frequency of 5 kHz causes the skin effect to occur in the heating element. By manually adjusting the frequency of the first AC current while keeping its voltage constant, the effective resistance of the heating element can be increased or decreased accordingly, thus increasing or decreasing the output power.

[0044] If only the skin effect is considered, under the condition of 1kHz or 1MHz AC, with the AC voltage set to a constant 4.2V, the thickness of the heating element is 0.08 mm, its resistance is 1 Ω, and its conductivity is 4.3e7S / m, the equivalent resistance and output power of the heating element are calculated as follows:

[0045] Basic parameters: Conductivity σ = 4.3 × 10 7 S / m, resistance R=1 Ω, thickness t=0.08 mm, permeability μ≈μ0=4π×10 −7 Given H / m and a voltage of V = 4.2 V, the formula for calculating resistivity ρ is:

[0046] ρ=δ -1 =1÷(4.3×10 7 ) ≈2.33×10 -8 Ω·m;

[0047] Skin depth is:

[0048] The skin depth for an alternating current frequency of 1 kHz is:

[0049] δ 1kHz =[(2×2.33×10 -8 ) ÷ (2π × 1 × 10 3 ×4π×10 -7 )] 0.5≈4.31×10 -3 m

[0050] The skin depth for an alternating current frequency of 1 MHz is:

[0051] δ 1MHz =[(2×2.33×10 -8 ) ÷ (2π × 1 × 10 6 ×4π×10 -7 )] 0.5 ≈1.36×10 -4 m

[0052] The formula for calculating the equivalent resistance is R. eff =R×t÷δ, at 1kHz, since 4.31 mm is much larger than 0.08 mm, it can be considered that the skin effect has a small impact on the resistance at 1kHz, and the original resistance value of 1Ω can still be used. However, at 1MHz:

[0053] R eff,1MHz =R0×0.08mm÷0.136mm=1Ω×0.08÷0.136≈0.588Ω;

[0054] The output power is then calculated as follows:

[0055] P=V 2 ÷R;

[0056] At 1kHz, the output power is:

[0057] P 1kHz =4.2 2 ÷1=17.64W;

[0058] At 1MHz, the output power is:

[0059] P 1MHz =4.2 2 ÷0.588≈30.00W;

[0060] From the above, we can see that at 1kHz, the equivalent resistance is approximately 1Ω and the output power is approximately 17.64 W. At 1MHz, the equivalent resistance is approximately 0.588Ω and the output power is approximately 30.00W.

[0061] Based on the above theory, when AC power with a frequency of 5kHz is used as the power supply for the heating element, while keeping the output power constant, adjusting the frequency of the AC power can increase or decrease the power density on the surface of the heating element, thus achieving faster or slower burst heating in a short time.

[0062] The calculations above show that, assuming the output power remains constant, the thickness at 1 MHz is approximately 50% of that at 1 kHz. Therefore, the effective volume through which the current passes is twice that at 1 kHz, meaning the power density at 1 kHz is half that at 1 MHz. Consequently, at 1 MHz, the heating element has higher heating efficiency, meaning the temperature rises faster and the heating effect is more rapid. This means that by adjusting the frequency of the first AC current to change the heating element's heating efficiency, the adjustment can be faster and more precise.

[0063] Please refer to Figure 2 The diagram below shows the structural block diagram of an electronic atomizing device 100 in one embodiment. The electronic atomizing device 100 includes an electronic atomizer 2 and a power supply control device 1 as described in the above embodiment. The electronic atomizer 2 includes a heating element 21 and a liquid storage device. The heating element 21 is electrically connected to the power supply control device 1 and is used to convert the electrical energy of the first AC power output by the power supply control device 1 into heat energy using the skin effect. The equivalent resistance of the heating element 21 changes in response to the change in the frequency of the AC power from the power supply control device 1. The liquid storage device is used to store the atomizing matrix and is in communication with the heating element 21.

[0064] Please refer to Figure 3 A schematic diagram of the structure of an electronic atomizing device in one embodiment is shown. In one embodiment, the electronic atomizing device 100 further includes an interaction module 3 connected to a controller 20. The interaction module 3 is used to respond to user input control commands to set the values ​​of electrical parameters of a first AC power supply, and output the values ​​of the electrical parameters of the first AC power supply to the controller 20, so as to set or change the electrical parameters of the first AC power supply output by the AC power supply 10. In one embodiment, the interaction module 3 includes an input unit 31 and a display unit 32. The input unit 31 includes buttons and / or a touch screen for receiving input control commands. The display unit 32 includes a display screen for displaying the values ​​of the electrical parameters of the first AC power supply. In one embodiment, the heating element is a conductor, and the skin effect of high-frequency AC power is used to convert heat energy, with an equivalent resistance value not greater than 1 ohm. In another embodiment, the heating element is a heating mesh with dimensions of 6mm x 6mm x 0.08mm. In another embodiment, the heating element is a hollow metal conductor. In another embodiment, the heating element has a conductive covering film on the outer surface of an insulating and heat-insulating heating mesh for heat energy conversion through the skin effect of the conductive covering film.

[0065] In one embodiment, the controller employs a microcontroller (e.g., STM32). The controller 20 sets the frequency of the first AC current using a pulse frequency modulation (PFM) method based on the electrical parameter values ​​input from the interaction module 3. In another embodiment, the controller uses PID control to perform feedback control on the frequency of the first AC current, specifically including:

[0066] First, the interactive module presets the heating mode of the heating element (including setting initial electrical parameters). Then, the controller supplies power to the heating element according to the preset initial electrical parameters for heat energy conversion. Next, it monitors the heating temperature of the heating element and dynamically changes or adjusts the power supply parameters based on the temperature value. Different heating modes correspond to different PFM-time curves. When the heating element performs heat energy conversion according to the preset heating mode, the electrical parameters are adjusted according to the PFM-time curve corresponding to that heating mode.

[0067] This application discloses a power supply control device for powering an electronic atomizer, including an AC power supply and a controller. The AC power supply outputs a first AC current to the heating element of the electronic atomizer, and the controller controls the electrical parameters of the first AC current to change the heating power of the heating element. By using AC current as the power supply for the heating element and changing the heating power of the heating element by controlling the electrical parameters of the first AC current, the heating power adjustment of the electronic atomizer is faster and more precise. Furthermore, by using high-frequency AC power, the energy conversion efficiency of the electronic atomizer is higher, increasing the battery life and thus extending its service life.

[0068] 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 power supply control device for supplying electrical energy to an electronic atomizer, the electronic atomizer including a heating element, characterized in that, The power supply control device includes an AC power supply and a controller; The AC power supply is used to output first AC power to the electronic atomizer, so as to use the first AC power as the power supply for the heating element. The controller is connected to the AC power supply and is used to adjust the electrical parameters of the first AC power supply to change the heating power of the heating element; wherein the electrical parameters include at least one of frequency, peak value and / or effective voltage value.

2. The power supply control device as described in claim 1, characterized in that, The AC power supply includes an energy storage battery and an inverter; The energy storage battery is connected to the inverter and is used to output a first DC power to the inverter. The inverter is used to convert the first direct current into the first alternating current.

3. The power supply control device as described in claim 2, characterized in that, The inverter is a half-bridge inverter circuit or a full-bridge inverter circuit. The controller is connected to the inverter and is used to control the electrical parameters of the first AC power supply by controlling the inverter's inverter operating parameters; wherein, the inverter operating parameters include AC side technical parameters, which include output voltage, rated output current, frequency range and / or waveform.

4. The power supply control device as described in claim 3, characterized in that, The controller is also used to adjust the heat generation rate of the heating element by adjusting the frequency of the first alternating current.

5. The power supply control device as described in claim 1, characterized in that, The frequency of the first alternating current is configured by the controller to be adjusted within the range of 1kHz-10MHz.

6. The power supply control device as described in claim 5, characterized in that, The waveform of the first alternating current is a square wave or a triangular wave.

7. An electronic atomizing device, characterized in that, Includes an electronic atomizer and a power supply control device as described in any one of claims 1 to 6; the electronic atomizer includes: The heating element is electrically connected to the power supply control device, and the equivalent resistance of the heating element changes in response to the change of the AC frequency of the power supply control device. A liquid storage device is used to store the atomizing matrix, and the liquid storage device and the heating element are in liquid-conducting communication.

8. The electronic atomizing device as described in claim 7, characterized in that, It also includes an interaction module connected to the controller; the interaction module is used to respond to user input control commands to set the values ​​of the electrical parameters of the first AC power supply, and output the values ​​of the electrical parameters of the first AC power supply to the controller, so as to set or change the electrical parameters of the first AC power supply output by the AC power source.

9. The electronic atomizing device as described in claim 8, characterized in that, The interactive module includes an input unit and a display unit; The input unit includes buttons and / or a touch screen for receiving the input control commands; The display unit includes a display screen for displaying the values ​​of the electrical parameters of the first alternating current.

10. The electronic atomizing device as described in claim 7, characterized in that, The equivalent resistance of the heating element is no greater than 1 ohm.

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