Atomizing circuit and atomizing device

Abstract

The utility model provides a kind of atomization circuit and atomization device, wherein, atomization circuit includes controller, first switching circuit, first heating drive circuit and second heating drive circuit, first heating body and second heating body are connected head to tail by a cross-over resistance, when heating first heating body, first switching circuit and first heating drive circuit can be triggered to conduct under the control of switching signal and first heating control signal, drive voltage generates drive current through first heating body, second heating body and cross-over resistance, first heating body and second heating body shunt and heat respectively, the current flowing through first heating body is greater than the current flowing through second heating body, first heating body heats aerosol-generating substrate in corresponding position atomization, simultaneously, second heating body can preheat, when switching to heat second heating body, can make second heating body rapidly heat, improve atomization efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of atomization technology, and in particular relates to an atomization circuit and atomization device. Background Technology

[0002] Atomizing devices can atomize an aerosol generating matrix into aerosols for users to inhale. They have advantages such as safety, convenience, health, and environmental friendliness, and are therefore receiving increasing attention and favor.

[0003] Atomizing devices typically include an atomizing component and an atomizing circuit. The atomizing circuit outputs a driving voltage to the atomizing component, which heats up and atomizes the internal aerosol-generating matrix, producing aerosols for the user to inhale.

[0004] Among them, such as Figure 1 As shown, the atomizing component typically employs a two-stage heating scheme, with two heating elements inside the atomizing component set in segments and heating the aerosol generation matrix in segments.

[0005] In a conventional atomizing circuit, two heating elements are connected to a common terminal, and the other ends of the two heating elements are each connected to a switching circuit. During heating, the atomizing circuit outputs a driving voltage to the common terminal. When it is necessary to heat one section of the aerosol-generating matrix, the switching circuit connected to the corresponding heating element is turned on, and the driving voltage is output to the heating element corresponding to that section. The heating element heats up and heats the aerosol-generating matrix, thereby achieving sequential heating of the two sections. When heating one section of the heating element, the other heating element is in a stopped heating state. When switching to the other section of the heating element, it is necessary to heat from room temperature to the target temperature, resulting in low heating efficiency. Utility Model Content

[0006] The purpose of this invention is to provide an atomizing circuit that solves the problem of low heating efficiency in traditional atomizing circuits.

[0007] A first aspect of this utility model provides an atomizing circuit, which is connected to an atomizing component. The atomizing component includes at least a first heating element, a second heating element, and a heating cavity. The first heating element and the second heating element are segmented along the heating cavity. The atomizing component also includes a bridging resistor, and the first heating element, the second heating element, and the bridging resistor are connected in ohms from end to end.

[0008] The atomizing circuit includes:

[0009] The controller is used to output a switch signal, a first heating control signal, and a second heating control signal;

[0010] The first switching circuit is connected to the first connection node and the first positive voltage terminal respectively. The first switching circuit is triggered by the switching signal to turn on and off and transmit the driving voltage to the first heating element and the second heating element accordingly or to cut off the transmission of the driving voltage. The first connection node is the connection node between the first heating element and the second heating element.

[0011] The first heating drive circuit is connected to the ground terminal and the second connection node respectively. The first heating drive circuit is triggered to switch on and off by the first heating control signal. The second connection node is the connection node between the first heating element and the bridging resistor.

[0012] The second heating drive circuit is connected to the ground terminal and the third connection node respectively. The second heating drive circuit is triggered to switch on and off by the second heating control signal. The third connection node is the connection node between the second heating element and the bridging resistor.

[0013] Optionally, the first switching circuit includes a first resistor, a second resistor, a first electronic switch, a second electronic switch, and a first capacitor;

[0014] The first end of the first resistor, the first end of the first capacitor, the first end of the first electronic switch and the first positive voltage terminal are connected. The second end of the first capacitor is grounded. The control terminal of the first electronic switch, the second end of the first resistor and the second end of the second electronic switch are connected. The second end of the first electronic switch is connected to the first connection node. The first end of the second electronic switch and the first end of the second resistor are grounded. The control terminal of the second electronic switch and the second end of the second resistor constitute the control terminal of the first switching circuit and are used to input the switching signal.

[0015] Optionally, the first heating drive circuit includes a third resistor and a third electronic switch.

[0016] The first end of the third electronic switch is connected to the second connection node, the second end of the third electronic switch and the first end of the third resistor are grounded, and the control end of the third electronic switch and the second end of the third resistor are connected to form the control end of the first heating drive circuit and are used to input the first heating control signal.

[0017] Optionally, the second heating drive circuit includes a fourth resistor and a fourth electronic switch.

[0018] The first end of the fourth electronic switch is connected to the third connection node, the second end of the fourth electronic switch and the first end of the fourth resistor are grounded, and the control end of the fourth electronic switch and the second end of the fourth resistor are connected to form the control end of the second heating drive circuit and are used to input the second heating control signal.

[0019] Optionally, the atomizing circuit further includes:

[0020] A temperature sampling circuit is connected to the first connection node, the second connection node, the third connection node, and the controller, respectively. The temperature sampling circuit is triggered by the enable signal output by the controller to output a test voltage to the first connection node, and samples the electrical parameters of the first connection node, the second connection node, and the third connection node, and outputs them to the controller, so that the controller can determine the temperature of the first heating element and / or the second heating element based on the electrical parameters.

[0021] Optionally, the temperature sampling circuit includes:

[0022] The second switching circuit is connected to the second positive voltage terminal and the controller. It is triggered by the enable signal to switch on and off and transmit the test voltage or cut off the transmission of the test voltage accordingly.

[0023] A sampling resistor, wherein the first end of the sampling resistor is connected to the second switching circuit and the first sampling terminal of the controller, and the second end of the sampling resistor is connected to the second sampling terminal of the controller;

[0024] A unidirectional conduction circuit, wherein the input terminal of the unidirectional conduction circuit is connected to the second terminal of the sampling resistor, and the output terminal of the unidirectional conduction circuit is connected to the first connection node, and the unidirectional conduction circuit is used to transmit the test voltage to the first connection node in one direction.

[0025] The first voltage sampling circuit is connected to the first connection node and the third sampling terminal of the controller respectively. The first voltage sampling circuit is used to sample the voltage VS3 of the first connection node and output the first sampled voltage to the controller.

[0026] The second voltage sampling circuit is connected to the second connection node and the fourth sampling terminal of the controller, respectively. The second voltage sampling circuit is used to sample the voltage of the second connection node and output the second sampled voltage to the controller.

[0027] The third voltage sampling circuit is connected to the third connection node and the fifth sampling terminal of the controller, respectively. The third voltage sampling circuit is used to sample the voltage of the third connection node and output the third sampled voltage to the controller.

[0028] Optionally, the second switching circuit includes a fifth electronic switch.

[0029] The first terminal of the fifth electronic switch is connected to the second positive voltage terminal, the second terminal of the fifth electronic switch is connected to the first terminal of the sampling resistor, and the control terminal of the fifth electronic switch constitutes the control terminal of the second switching circuit and is used to input the enable signal.

[0030] Optionally, the unidirectional conduction circuit includes a diode;

[0031] The anode of the diode is connected to the second end of the sampling resistor, and the cathode of the diode is connected to the first connection node.

[0032] Optionally, the first voltage sampling circuit includes a fifth resistor, a first Zener diode, and a second capacitor;

[0033] The first end of the fifth resistor is connected to the first connection node, the second end of the fifth resistor, the first end of the second capacitor, the cathode of the first Zener diode and the third sampling terminal of the controller are connected, and the second end of the second capacitor and the anode of the first Zener diode are grounded.

[0034] The second voltage sampling circuit includes a sixth resistor, a second Zener diode, and a third capacitor;

[0035] The first end of the sixth resistor is connected to the second connection node, the second end of the sixth resistor, the first end of the third capacitor, the cathode of the second Zener diode and the fourth sampling terminal of the controller are connected, and the second end of the third capacitor and the anode of the second Zener diode are grounded.

[0036] The third voltage sampling circuit includes a seventh resistor, a third Zener diode, and a fourth capacitor;

[0037] The first end of the seventh resistor is connected to the third connection node, the second end of the seventh resistor, the first end of the fourth capacitor, the cathode of the third Zener diode, and the fifth sampling terminal of the controller are connected, and the second end of the fourth capacitor and the anode of the third Zener diode are grounded.

[0038] A second aspect of this utility model provides an atomizing device, including an atomizing component and an atomizing circuit as described above. The atomizing component includes at least a first heating element, a second heating element, and a heating cavity. The first heating element and the second heating element are segmented along the heating cavity. The atomizing component also includes a bridging resistor. The first heating element, the second heating element, and the bridging resistor are connected in ohms from end to end. The three connection nodes of the first heating element, the second heating element, and the bridging resistor are respectively connected to the atomizing circuit.

[0039] The beneficial effects of this utility model embodiment compared with the prior art are as follows: The atomization circuit includes a controller, a first switching circuit, a first heating drive circuit, and a second heating drive circuit. The first heating element and the second heating element are connected end to end through a bridging resistor. When heating the first heating element, the first switching circuit and the first heating drive circuit can be triggered to conduct under the control of the switching signal and the first heating control signal. The driving voltage generates a driving current through the first heating element, the second heating element, and the bridging resistor. The first heating element and the second heating element are shunt and heated respectively. The current flowing through the first heating element is greater than the current flowing through the second heating element. The first heating element heats and atomizes the aerosol at the corresponding position to generate a matrix. At the same time, the second heating element can be preheated. When switching to heating the second heating element, the second heating element can be heated up quickly, improving the atomization efficiency. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the structure of the atomizing component provided in an embodiment of the present utility model;

[0041] Figure 2 A first circuit diagram of the atomizing circuit provided in this embodiment of the utility model;

[0042] Figure 3 A second circuit diagram of the atomizing circuit provided in this embodiment of the utility model;

[0043] Figure 4 A third circuit diagram of the atomizing circuit provided in this embodiment of the utility model;

[0044] Figure 5 A fourth circuit diagram of the atomizing circuit provided in this embodiment of the utility model;

[0045] Figure 6 This is a fifth circuit diagram of the atomizing circuit provided in the embodiments of this utility model.

[0046] The figures in the diagram are labeled as follows:

[0047] 1. Aerosol generating matrix; 100. Atomizing component; 200. Atomizing circuit; 110. First heating element; 120. Second heating element; 130. Heating chamber; 210. Controller; 220. First switching circuit; 230. First heating drive circuit; 240. Second heating drive circuit; 250. Temperature sampling circuit; 251. Second switching circuit; 252. One-way conduction circuit; 253. First voltage sampling circuit; 254. Second voltage sampling circuit; 255. Third voltage sampling circuit;

[0048] R0, bridging resistor; Rx, sampling resistor; R1, first resistor; R2, second resistor; R3, third resistor; R4, fourth resistor; R5, fifth resistor; R6, sixth resistor; R7, seventh resistor; Q1, first electronic switch transistor; Q2, second electronic switch transistor; Q3, third electronic switch transistor; Q4, fourth electronic switch transistor; Q5, fifth electronic switch transistor; C1, first capacitor; C2, second capacitor; C3, third capacitor; C4, fourth capacitor; D1, diode; ZD1, first Zener diode; ZD2, second Zener diode; ZD3, third Zener diode; VCC1, first positive voltage terminal; VCC2, second positive voltage terminal;

[0049] Ctr1, switch signal; Ctr2, first heating control signal; Ctr3, second heating control signal; EN, enable signal; VS1, voltage at the first terminal of the sampling resistor; VS2, voltage at the second terminal of the sampling resistor; VS3, voltage at the first connection node; VS4, voltage at the second connection node; VS5, voltage at the third connection node. Detailed Implementation

[0050] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0052] A first aspect of this utility model embodiment provides an atomizing circuit 200.

[0053] like Figure 2 As shown, the atomizing circuit 200 is connected to the atomizing assembly 100, and the atomizing assembly 100 includes at least a first heating element 110 and a second heating element 120. (Refer to...) Figure 1As shown, the atomizing assembly 100 may also include a corresponding housing, within which a heating chamber 130 for accommodating the aerosol generating matrix 1 and an opening for easy insertion and removal of the aerosol generating matrix 1 are provided. The first heating element 110 and the second heating element 120 are arranged in segments along the heating chamber 130. The atomizing assembly 100 also includes a bridging resistor R0. The first heating element 110, the second heating element 120 and the bridging resistor R0 are connected end-to-end in ohms. The end-to-end connection means that the first heating element 110, the second heating element 120 and the bridging resistor R0 form a ring topology. A connection node is provided between the first heating element 110 and the second heating element 120, a connection node is provided between the second heating element 120 and the bridging resistor R0, and a connection node is provided between the bridging resistor R0 and the first heating element 110. Each connection node can be connected to a power supply or ground.

[0054] The first heating element 110 and the second heating element 120 can adopt structures such as heating wires and heating films. The first heating element 110 and the second heating element 120 can be set as the inner wall of the heating cavity 130, or they can be arranged in a ring structure. The specific structure is not limited.

[0055] The first heating element 110 and the second heating element 120 can be a single heating trajectory, or one or more parallel heating trajectories. In some embodiments, the first heating element 110 consists of two parallel heating trajectories, and the second heating element 120 consists of a single heating trajectory.

[0056] The bridging resistor R0 can be a conventional resistor or a thermistor, and the specific structure is not limited. In an optional embodiment, the bridging resistor R0 is a positive temperature coefficient thermistor. The bridging resistor R0 is located near the second heating element 120. When the first heating element 110 or the second heating element 120 is initially powered on and heated, the resistance of the bridging resistor R0 is small. When the first heating element 110 or the second heating element 120 reaches a certain temperature, the resistance of the bridging resistor R0 is large.

[0057] The bridging resistor R0 can be a single heating trajectory or multiple heating trajectories connected in parallel.

[0058] The first heating element 110 is positioned near the opening of the heating chamber 130, and can quickly generate aerosols by heating the aerosol generating matrix. The second heating element 120 is positioned near the bottom of the heating chamber 130. The resistance of the first heating element 110 is equal to the resistance of the second heating element 120, and the resistance of the bridging resistor R0 is greater than the resistance of the first heating element 110.

[0059] The atomizing circuit 200 includes:

[0060] Controller 210 is used to output switch signal Ctr1, first heating control signal Ctr2 and second heating control signal Ctr3;

[0061] The first switching circuit 220 is connected to the first connection node and the first positive voltage terminal VCC1 respectively. The first switching circuit 220 is triggered to switch on and off by the switching signal Ctr1 and transmits or cuts off the transmission of the driving voltage to the first heating element 110 and the second heating element 120 accordingly. The first connection node is the connection node between the first heating element 110 and the second heating element 120.

[0062] The first heating drive circuit 230 is connected to the ground terminal and the second connection node respectively. The first heating drive circuit 230 is triggered to switch on and off by the first heating control signal Ctr2. The second connection node is the connection node between the first heating element 110 and the bridging resistor R0.

[0063] The second heating drive circuit 240 is connected to the ground terminal and the third connection node. The second heating drive circuit 240 is triggered to turn on and off by the second heating control signal Ctr3. The third connection node is the connection node between the second heating element 120 and the bridging resistor R0. In this embodiment, when the aerosol generating matrix 1 is inserted into the heating chamber 130, the atomizing circuit 200 starts heating. The controller 210 outputs a switch signal Ctr1 to control the first switch circuit 220 to turn on, and outputs a first heating control signal Ctr2 to control the first heating drive circuit 230 to turn on. It also outputs a second heating control signal Ctr3 to control the second heating drive circuit 240 to turn off. The driving voltage is applied to both ends of the first heating element 110 and to both ends of the second heating element 120 and the bridging resistor R0 connected in series, forming two current loops. One current loop is the first positive voltage terminal VCC1, the first switch circuit 220, the first heating element 110, and the first... The heating drive circuit 230 and ground are connected in one current loop, which is connected to the first positive voltage terminal VCC1, the first switching circuit 220, the second heating element 120, the bridging resistor R0, the first heating drive circuit 230 and ground. The resistance of the first heating element 110 is less than the total resistance of the second heating element 120 and the bridging resistor R0. The current flowing through the first heating element 110 is greater than the current flowing through the second heating element 120. The first heating element 110 heats up and heats the aerosol generating matrix 1 of the first stage, which can quickly generate aerosol. At the same time, the second heating element 120 starts to heat up slightly under the drive of a small current, which can preheat the aerosol generating matrix 1 of the second stage and improve the atomization efficiency.

[0064] When the bridging resistor R0 is a thermistor with a positive temperature coefficient, the initial resistance of the bridging resistor R0 is small.

[0065] Then, when switching to heating the aerosol generating matrix 1 in the second stage, the controller 210 outputs a switching signal Ctr1 to control the first switching circuit 220 to turn on, and outputs a first heating control signal Ctr2 to control the first heating drive circuit 230 to turn off, and outputs a second heating control signal Ctr3 to control the second heating drive circuit 240 to turn on. The driving voltage is applied to both ends of the second heating element 120, and also to both ends of the first heating element 110 connected in series and the bridging resistor R0, forming two current loops, one of which is the first positive voltage terminal VC. C1, the first switching circuit 220, the second heating element 120, the second heating drive circuit 240 and the ground terminal, and another current loop is the first positive voltage terminal VCC1, the first switching circuit 220, the first heating element 110, the bridging resistor R0, the second heating drive circuit 240 and the ground terminal. The resistance of the second heating element 120 is less than the total resistance of the first heating element 110 and the bridging resistor R0. The current flowing through the second heating element 120 is greater than the current flowing through the first heating element 110. The second heating element 120 heats up and heats the aerosol generation matrix 1 of the second section.

[0066] When the bridging resistor R0 is a thermistor with a positive temperature coefficient, as the temperature of the second heating element 120 gradually increases, the temperature of the bridging resistor R0 also increases, the resistance of the bridging resistor R0 gradually increases, the current flowing through the first heating element 110 gradually decreases, and the heat generated on the first heating element 110 gradually decreases. When the resistance of the bridging resistor R0 is large enough, the current flowing through the first heating element 110 can be ignored. The first heating element 110 has no actual heating capacity for the aerosol generating matrix 1 in the first stage, thereby preventing the problem of overheating of the aerosol generating matrix 1 in the first stage leading to coking and improving atomization safety.

[0067] The first switching circuit 220, the first heating drive circuit 230, and the second heating drive circuit 240 can be switching devices or circuits with controlled on / off states, such as transistors, MOSFETs, etc., and the specific structure is not limited.

[0068] The first switching signal Ctr1 can be switched to the corresponding high or low level or high or low voltage based on the structure and on / off requirements of the first switching circuit 220, and the specific signal type is not limited.

[0069] The first heating control signal Ctr2 and the second heating control signal Ctr3 can also be switched to corresponding high and low levels or high and low voltages according to the structure and on / off requirements of the first heating drive circuit 230 and the second heating drive circuit 240. At the same time, a pulse width modulation signal with a corresponding duty cycle can be selected according to the heating power. By changing the size of the duty cycle, the average current of the first heating element 110 and the second heating element 120 can be changed, thereby changing the heating power of the first heating element 110 and the second heating element 120.

[0070] In an alternative embodiment, such as Figure 3 As shown, the first switching circuit 220 includes a first resistor R1, a second resistor R2, a first electronic switch Q1, a second electronic switch Q2, and a first capacitor C1;

[0071] The first terminal of the first resistor R1, the first terminal of the first capacitor C1, the first terminal of the first electronic switch Q1, and the first positive voltage terminal VCC1 are connected. The second terminal of the first capacitor C1 is grounded. The control terminal of the first electronic switch Q1, the second terminal of the first resistor R1, and the second terminal of the second electronic switch Q2 are connected. The second terminal of the first electronic switch Q1 is connected to the first connection node. The first terminal of the second electronic switch Q2 and the first terminal of the second resistor R2 are grounded. The control terminal of the second electronic switch Q2 and the second terminal of the second resistor R2 constitute the control terminal of the first switching circuit 220 and are used to input the switching signal Ctr1.

[0072] The first heating drive circuit 230 includes a third resistor R3 and a third electronic switch Q3;

[0073] The first terminal of the third electronic switch Q3 is connected to the second connection node. The second terminal of the third electronic switch Q3 and the first terminal of the third resistor R3 are grounded. The control terminal of the third electronic switch Q3 and the second terminal of the third resistor R3 are connected to form the control terminal of the first heating drive circuit 230 and are used to input the first heating control signal Ctr2.

[0074] The second heating drive circuit 240 includes a fourth resistor R4 and a fourth electronic switch Q4;

[0075] The first terminal of the fourth electronic switch Q4 is connected to the third connection node, the second terminal of the fourth electronic switch Q4 and the first terminal of the fourth resistor R4 are grounded, and the control terminal of the fourth electronic switch Q4 and the second terminal of the fourth resistor R4 are connected to form the control terminal of the second heating drive circuit 240 and are used to input the second heating control signal Ctr3.

[0076] In this embodiment, when the aerosol generating matrix 1 is inserted into the heating chamber 130, the atomization circuit 200 starts heating. The controller 210 outputs a high-level switching signal Ctr1 to control the second electronic switch Q2 to turn on, and a low-level signal is transmitted to the first electronic switch Q1, turning on the first electronic switch Q1. The controller also outputs a high-level first heating control signal Ctr2 to control the third electronic switch Q3 to turn on, and outputs a low-level second heating control signal Ctr3 to control the fourth electronic switch Q4 to turn off. A driving voltage is applied across the first heating element 110 and across the second heating element 120 connected in series and the bridging resistor R0, forming two current loops. One of these current loops is the first positive voltage terminal VC. C1, the first electronic switch Q1, the first heating element 110, the third electronic switch Q3, and ground are connected in another current loop, which is the first positive voltage terminal VCC1, the first electronic switch Q1, the second heating element 120, the bridging resistor R0, the third electronic switch Q3, and ground. The resistance of the first heating element 110 is less than the total resistance of the second heating element 120 and the bridging resistor R0. The current flowing through the first heating element 110 is greater than the current flowing through the second heating element 120. The first heating element 110 heats up and heats the aerosol generating matrix 1 of the first stage. At the same time, the second heating element 120 begins to heat up slightly under the drive of a small current, which can preheat the aerosol generating matrix 1 of the second stage and improve the atomization efficiency.

[0077] When the bridging resistor R0 is a thermistor with a positive temperature coefficient, the initial resistance of the bridging resistor R0 is small.

[0078] Then, when switching to heating the aerosol generation matrix 1 in the second stage, the controller 210 outputs a high-level switching signal Ctr1 to control the second electronic switch Q2 to turn on, and indirectly controls the first electronic switch Q1 to turn on. It also outputs a low-level first heating control signal Ctr2 to control the third electronic switch Q3 to turn off, and outputs a high-level second heating control signal Ctr3 to control the fourth electronic switch Q4 to turn on. A driving voltage is applied across the two ends of the second heating element 120, and across the first heating element 110 connected in series with the bridging resistor R0, forming two current loops. One current loop consists of the first positive voltage terminal VCC1, the first electronic switch Q1, the second heating element 120, the fourth electronic switch Q4, and ground. The other current loop consists of the first positive voltage terminal VCC1, the first electronic switch Q1, the first heating element 110, the bridging resistor R0, the fourth electronic switch Q4, and ground. The resistance of the second heating element 120 is less than the total resistance of the first heating element 110 and the bridging resistor R0. The current flowing through the second heating element 120 is greater than the current flowing through the first heating element 110. The second heating element 120 heats up and heats the aerosol-generated matrix 1 in the second section.

[0079] When the bridging resistor R0 is a thermistor with a positive temperature coefficient, as the temperature of the second heating element 120 gradually increases, the temperature of the bridging resistor R0 also increases, the resistance of the bridging resistor R0 gradually increases, the current flowing through the first heating element 110 gradually decreases, and the heat generated on the first heating element 110 gradually decreases. When the resistance of the bridging resistor R0 is large enough, the current flowing through the first heating element 110 can be ignored. The first heating element 110 has no actual heating capacity for the aerosol generating matrix 1 in the first stage, thereby preventing the problem of overheating of the aerosol generating matrix 1 in the first stage leading to coking and improving atomization safety.

[0080] Among them, the first electronic switch Q1, the second electronic switch Q2, the third electronic switch Q3 and the fourth electronic switch Q4 can be corresponding MOS transistors, transistors, etc. In an optional embodiment, the second electronic switch Q2, the third electronic switch Q3 and the fourth electronic switch Q4 are NMOS transistors and the first electronic switch Q1 is a PMOS transistor.

[0081] Furthermore, to improve heating safety, the atomizing circuit 200 can also provide over-temperature protection. Therefore, in an optional embodiment, such as... Figure 4 As shown, the atomizing circuit 200 also includes:

[0082] Temperature sampling circuit 250 is connected to the first connection node, the second connection node, the third connection node and the controller 210 respectively. Temperature sampling circuit 250 is triggered by the enable signal EN output by the controller 210 to output a test voltage to the first connection node, and samples the electrical parameters of the first connection node, the second connection node and the third connection node respectively and outputs them to the controller 210 so that the controller 210 determines the temperature of the first heating element 110 and / or the second heating element 120 based on the electrical parameters.

[0083] In this embodiment, the controller 210 can alternate between driving and temperature measurement. When driving, it controls the first switching circuit 220 to turn on, controls the temperature sampling circuit 250 to turn off, and controls the first heating driving circuit 230 or the second heating driving circuit 240 to turn on, thereby driving the first heating element 110 or the second heating element 120 to heat up.

[0084] During temperature measurement, the first switching circuit 220 is turned off, the temperature sampling circuit 250 is started, and the first heating drive circuit 230 or the second heating drive circuit 240 is turned on. The temperature sampling circuit 250 outputs a test voltage to the first heating element 110 or the second heating element 120. At the same time, the temperature sampling circuit 250 samples the electrical parameters of the first connection node, the second connection node, and the third connection node. The electrical parameters can be at least one of current and voltage. The controller 210 can obtain the current and voltage of the first heating element 110 and the second heating element 120 according to the electrical parameters of different connection nodes, and can determine the resistance of the first heating element 110 and the second heating element 120 based on Ohm's law. Since the first heating element 110 and the second heating element 120 have stable temperature coefficients of resistance, the temperature of the first heating element 110 and the second heating element 120 can be determined based on the resistance of the first heating element 110 and the second heating element 120.

[0085] The controller 210 can detect the temperature of the first heating element 110 and the second heating element 120 in real time through the temperature sampling circuit 250, and can realize temperature control protection. For example, when the temperature of the first heating element 110 is detected to be greater than the threshold temperature, the controller controls the first switching circuit 220 and the first heating drive circuit 230 to be turned off to realize over-temperature protection until the temperature of the first heating element 110 is lower than the threshold temperature.

[0086] The temperature sampling circuit can be selected from corresponding voltage sources, voltage sampling circuits, current sampling circuits, etc. In one optional embodiment, such as... Figure 5 As shown, the temperature sampling circuit 250 includes:

[0087] The second switching circuit 251 is connected to the second positive voltage terminal VCC2 and the controller 210. It is triggered to switch on and off by the enable signal EN and transmits or cuts off the transmission of the test voltage accordingly.

[0088] The sampling resistor Rx has its first end connected to the first sampling terminal of the second switching circuit 251 and the controller 210, and its second end connected to the second sampling terminal of the controller 210.

[0089] The unidirectional conduction circuit 252 has its input terminal connected to the second terminal of the sampling resistor Rx and its output terminal connected to the first connection node. The unidirectional conduction circuit 252 is used to transmit the test voltage to the first connection node in one direction.

[0090] The first voltage sampling circuit 253 is connected to the first connection node and the third sampling terminal of the controller 210 respectively. The first voltage sampling circuit 253 is used to sample the voltage VS3 of the first connection node and output the first sampled voltage to the controller 210.

[0091] The second voltage sampling circuit 254 is connected to the second connection node and the fourth sampling terminal of the controller 210 respectively. The second voltage sampling circuit 254 is used to sample the voltage VS4 of the second connection node and output the second sampled voltage to the controller 210.

[0092] The third voltage sampling circuit 255 is connected to the third connection node and the fifth sampling terminal of the controller 210 respectively. The third voltage sampling circuit 255 is used to sample the voltage VS5 of the third connection node and output the third sampled voltage to the controller 210.

[0093] In this embodiment, when the controller 210 is measuring temperature, it can first control the first switching circuit 220 and the second heating drive circuit 240 to turn off, and control the second switching circuit 251 and the first heating drive circuit 230 to turn on. The controller 210 samples the first terminal voltage VS1, the second terminal voltage VS2, the voltage of the first connection node VS3, the voltage of the second connection node VS4 and the voltage of the third connection node VS5 of the sampling resistor Rx through the sampling resistor Rx, the first voltage sampling circuit 253, the second voltage sampling circuit 254 and the third sampling circuit, respectively.

[0094] According to Ohm's law, the current flowing through the sampling resistor Rx is:

[0095] ID1 = (VS1 - VS2) / Rx (1);

[0096] Where VS1 is the voltage at the first terminal of the sampling resistor Rx, and VS2 is the voltage at the second terminal of the sampling resistor Rx.

[0097] The current flowing through the first heating element 110 is:

[0098] IR1=(VS3-VS4) / R11 (2);

[0099] Wherein, VS3 is the voltage of the first connection node, VS4 is the voltage of the second connection node, and R11 represents the resistance of the first heating element 110.

[0100] The current flowing through the second heating element 120 is:

[0101] IR2 = (VS3 - VS5) / R12 (3);

[0102] Where VS5 is the voltage of the third connection node, and R12 represents the resistance of the second heating element 120.

[0103] From the above formulas (1), (2) and (3), we can obtain:

[0104] (VS1-VS2) / Rx = (VS3-VS4) / R11 + (VS3-VS5) / R12 (4);

[0105] Then, the controller 210 can switch the first switching circuit 220 and the first heating drive circuit 230 to turn off, and control the second switching circuit 251 and the second heating drive circuit 240 to turn on. The controller 210 then samples the first terminal voltage VS10, the second terminal voltage VS20, the voltage of the first connection node VS30, the voltage of the second connection node VS40, and the voltage of the third connection node VS50 of the sampling resistor Rx through the sampling resistor Rx, the first voltage sampling circuit 253, the second voltage sampling circuit 254, and the third sampling circuit, respectively.

[0106] According to Ohm's law, the current flowing through the sampling resistor Rx at this time is:

[0107] ID10 = (VS10 - VS20) / Rx (5);

[0108] Where VS10 is the voltage at the first terminal of the current sampling resistor Rx, and VS20 is the voltage at the second terminal of the current sampling resistor Rx.

[0109] The current flowing through the first heating element 110 is:

[0110] IR10=(VS30-VS40) / R11 (6);

[0111] Wherein, VS30 is the voltage of the current first connected node, and VS40 is the voltage of the current second connected node.

[0112] The current flowing through the second heating element 120 is:

[0113] IR20=(VS30-VS50) / R12 (7);

[0114] Where VS50 is the voltage of the third connection node, and R12 represents the resistance of the second heating element 120.

[0115] From the above formulas (4), (5) and (6), we can obtain:

[0116] (VS10-VS20) / Rx = (VS30-VS40) / R11 + (VS30-VS50) / R12 (8);

[0117] Based on formulas (4) and (8), we can obtain:

[0118] R11=(VR2*VR10-VR20*VR1) / (VR2*ID10-VR20*ID1);

[0119] R12=(VR1*VR20-VR10*VR2) / (VR1*ID10-VR10*ID1);

[0120] Among them, VR2=VS3-VS5, VR10=VS30-VS40, VR20=VS30-VS50, VR1=VS3-VS4.

[0121] The resistance values ​​of the first heating element 110 and the second heating element 120 can be determined according to the above formula. Since the temperature coefficient of the heating element is stable, the resistance value and temperature of the heating element change almost linearly. That is, the temperature of the heating element can be expressed as T=K*R+T0, where R is R11 or R12, T0 is the ambient temperature, i.e. the initial temperature of the heating element, and k is a constant. Therefore, the temperature of the heating element can be determined based on the resistance value of the heating element.

[0122] The second switching circuit 251 can employ a switching device with controlled on / off switching. In an optional embodiment, such as... Figure 6 As shown, the second switching circuit 251 includes a fifth electronic switch Q5;

[0123] The first terminal of the fifth electronic switch Q5 is connected to the second positive voltage terminal VCC2, the second terminal of the fifth electronic switch Q5 is connected to the first terminal of the sampling resistor Rx, and the control terminal of the fifth electronic switch Q5 constitutes the control terminal of the second switching circuit 251 and is used to input the enable signal EN.

[0124] Specifically, when the controller 210 outputs a high-level enable signal EN, the fifth electronic switch Q5 is turned on and transmits the test voltage to the first connection node. When the controller 210 outputs a low-level enable signal EN, the fifth electronic switch Q5 is turned off and the output test voltage is cut off.

[0125] The fifth electronic switch Q5 can be a corresponding type of switch. In an optional embodiment, the fifth electronic switch Q5 is an NPN transistor.

[0126] The unidirectional conduction circuit 252 is used to achieve unidirectional conduction and prevent the driving voltage from being transmitted in reverse to the sampling resistor Rx during atomization heating, which would cause overvoltage damage to the port of the controller 210.

[0127] The unidirectional conduction circuit 252 can employ diodes, switching transistors, etc., of appropriate structures. In one optional embodiment, such as... Figure 6 As shown, the unidirectional conduction circuit 252 includes a diode D1;

[0128] The anode of diode D1 is connected to the second terminal of the sampling resistor Rx, and the cathode of diode D1 is connected to the first connection node.

[0129] The first voltage sampling circuit 253, the second voltage sampling circuit 254, and the third voltage sampling circuit 255 can employ voltage divider resistors of appropriate structures, as shown in an optional embodiment. Figure 6As shown, the first voltage sampling circuit 253 includes a fifth resistor R5, a first Zener diode ZD1, and a second capacitor C2.

[0130] The first end of the fifth resistor R5 is connected to the first connection node. The second end of the fifth resistor R5, the first end of the second capacitor C2, the cathode of the first Zener diode ZD1, and the third sampling terminal of the controller 210 are connected. The second end of the second capacitor C2 and the anode of the first Zener diode ZD1 are grounded.

[0131] The second voltage sampling circuit 254 includes a sixth resistor R6, a second Zener diode ZD2, and a third capacitor C3;

[0132] The first end of the sixth resistor R6 is connected to the second connection node, the second end of the sixth resistor R6, the first end of the third capacitor C3, the cathode of the second Zener diode ZD2 and the fourth sampling terminal of the controller 210 are connected, and the second end of the third capacitor C3 and the anode of the second Zener diode ZD2 are grounded.

[0133] The third voltage sampling circuit 255 includes a seventh resistor R7, a third Zener diode ZD3, and a fourth capacitor C4.

[0134] The first end of the seventh resistor R7 is connected to the third connection node. The second end of the seventh resistor R7, the first end of the fourth capacitor C4, the cathode of the third Zener diode ZD3, and the fifth sampling terminal of the controller 210 are connected. The second end of the fourth capacitor C4 and the anode of the third Zener diode ZD3 are grounded.

[0135] In this embodiment, the fifth resistor R5 and the first Zener diode ZD1 form a voltage regulator circuit, the sixth resistor R6 and the second Zener diode ZD2 form a voltage regulator circuit, and the seventh resistor R7 and the third Zener diode ZD3 form a voltage regulator circuit. During heating, the voltage of the first connection node VS3, the voltage of the second connection node VS4, and the voltage of the third node are protected from overvoltage, so as to prevent the voltage of each connection node from exceeding the withstand voltage of the controller 210 and protect the port of the controller 210.

[0136] The beneficial effects of this utility model embodiment compared with the prior art are as follows: The atomization circuit 200 includes a controller 210, a first switching circuit 220, a first heating drive circuit 230, and a second heating drive circuit 240. The first heating element 110 and the second heating element 120 are connected end to end through a bridging resistor R0. When heating the first heating element 110, the first switching circuit 220 and the first heating drive circuit 230 can be triggered to conduct under the control of the switching signal Ctr1 and the first heating control signal Ctr2. The driving voltage generates a driving current through the first heating element 110, the second heating element 120, and the bridging resistor R0. The first heating element 110 and the second heating element 120 are shunt and heated respectively. The current flowing through the first heating element 110 is greater than the current flowing through the second heating element 120. The first heating element 110 heats and atomizes the aerosol generation matrix 1 at the corresponding position. At the same time, the second heating element 120 can be preheated. When switching to heating the second heating element 120, the second heating element 120 can be heated up quickly, improving the atomization efficiency.

[0137] The second aspect of this utility model provides an atomizing device, which includes an atomizing component 100 and an atomizing circuit 200. The specific structure of the atomizing circuit 200 is as described in the above embodiments. Since this atomizing device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0138] The atomizing component 100 includes at least a first heating element 110, a second heating element 120, and an aerosol generating matrix 1, as shown in the reference. Figure 1 As shown, the atomizing assembly 100 may also include a corresponding housing, within which a heating chamber 130 for accommodating the aerosol generating matrix 1 and an opening for easy insertion and removal of the aerosol generating matrix 1 are provided. The first heating element 110 and the second heating element 120 are arranged in segments along the heating chamber 130. The atomizing assembly 100 also includes a bridging resistor R0. The first heating element 110, the second heating element 120, and the bridging resistor R0 are connected end to end in sequence. The end-to-end connection means that the first heating element 110, the second heating element 120, and the bridging resistor R0 form a ring topology. A connection node is provided between the first heating element 110 and the second heating element 120, a connection node is provided between the second heating element 120 and the bridging resistor R0, and a connection node is provided between the bridging resistor R0 and the first heating element 110. The three connection nodes of the first heating element 110, the second heating element 120, and the bridging resistor R0 are respectively connected to the atomizing circuit 200.

[0139] In this embodiment, the first heating element 110 and the second heating element 120 can adopt structures such as heating wires and heating films. The first heating element 110 and the second heating element 120 can be arranged as the inner wall of the heating cavity 130, or they can be arranged in a ring structure. The specific structure is not limited.

[0140] The first heating element 110 and the second heating element 120 can be a single heating trajectory, or one or more parallel heating trajectories. In some embodiments, the first heating element 110 consists of two parallel heating trajectories, and the second heating element 120 consists of a single heating trajectory.

[0141] The first heating element 110 is positioned near the opening of the heating chamber 130, and can quickly generate aerosols by heating the aerosol generating matrix. The second heating element 120 is positioned near the bottom of the heating chamber 130. The resistance of the first heating element 110 is equal to the resistance of the second heating element 120, and the resistance of the bridging resistor R0 is greater than the resistance of the first heating element 110.

[0142] The atomizing device may also include corresponding modules such as batteries, charging circuits, charging ports, buttons, and indicator lights. The charging circuit obtains charging voltage through the charging port and charges the battery. The battery is used to provide the working voltage, driving voltage, and test voltage of each circuit module. The buttons are used to turn the atomizing device on and off, switch modes, etc. The indicator lights are used to indicate the current atomization status and on / off status of the atomizing device.

[0143] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model 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 utility model, and should all be included within the protection scope of this utility model.

Claims

1. An atomizing circuit, characterized in that, The atomizing circuit is connected to the atomizing component, which includes at least a first heating element, a second heating element, and a heating cavity. The first heating element and the second heating element are arranged in segments along the heating cavity. The atomizing component also includes a bridging resistor, and the first heating element, the second heating element, and the bridging resistor are connected in ohms from end to end. The atomizing circuit includes: The controller is used to output a switch signal, a first heating control signal, and a second heating control signal; The first switching circuit is connected to the first connection node and the first positive voltage terminal respectively. The first switching circuit is triggered by the switching signal to turn on and off and transmit the driving voltage to the first heating element and the second heating element accordingly, or to cut off the transmission of the driving voltage to the first heating element and the second heating element. The first connection node is the connection node between the first heating element and the second heating element. The first heating drive circuit is connected to the ground terminal and the second connection node respectively. The first heating drive circuit is triggered to switch on and off by the first heating control signal. The second connection node is the connection node between the first heating element and the bridging resistor. The second heating drive circuit is connected to the ground terminal and the third connection node respectively. The second heating drive circuit is triggered to switch on and off by the second heating control signal. The third connection node is the connection node between the second heating element and the bridging resistor.

2. The atomizing circuit as described in claim 1, characterized in that, The first switching circuit includes a first resistor, a second resistor, a first electronic switch, a second electronic switch, and a first capacitor; The first end of the first resistor, the first end of the first capacitor, the first end of the first electronic switch and the first positive voltage terminal are connected. The second end of the first capacitor is grounded. The control terminal of the first electronic switch, the second end of the first resistor and the second end of the second electronic switch are connected. The second end of the first electronic switch is connected to the first connection node. The first end of the second electronic switch and the first end of the second resistor are grounded. The control terminal of the second electronic switch and the second end of the second resistor constitute the control terminal of the first switching circuit and are used to input the switching signal.

3. The atomizing circuit as described in claim 1, characterized in that, The first heating drive circuit includes a third resistor and a third electronic switch. The first end of the third electronic switch is connected to the second connection node, the second end of the third electronic switch and the first end of the third resistor are grounded, and the control end of the third electronic switch and the second end of the third resistor are connected to form the control end of the first heating drive circuit and are used to input the first heating control signal.

4. The atomizing circuit as described in claim 1, characterized in that, The second heating drive circuit includes a fourth resistor and a fourth electronic switch. The first end of the fourth electronic switch is connected to the third connection node, the second end of the fourth electronic switch and the first end of the fourth resistor are grounded, and the control end of the fourth electronic switch and the second end of the fourth resistor are connected to form the control end of the second heating drive circuit and are used to input the second heating control signal.

5. The atomizing circuit as described in any one of claims 1 to 4, characterized in that, The atomizing circuit also includes: A temperature sampling circuit is connected to the first connection node, the second connection node, the third connection node, and the controller, respectively. The temperature sampling circuit is triggered by the enable signal output by the controller to output a test voltage to the first connection node, and samples the electrical parameters of the first connection node, the second connection node, and the third connection node, and outputs them to the controller, so that the controller can determine the temperature of the first heating element and / or the second heating element based on the electrical parameters.

6. The atomizing circuit as described in claim 5, characterized in that, The temperature sampling circuit includes: The second switching circuit is connected to the second positive voltage terminal and the controller. It is triggered by the enable signal to switch on and off and transmit the test voltage or cut off the transmission of the test voltage accordingly. A sampling resistor, wherein the first end of the sampling resistor is connected to the second switching circuit and the first sampling terminal of the controller respectively, and the second end of the sampling resistor is connected to the second sampling terminal of the controller; A unidirectional conduction circuit, wherein the input terminal of the unidirectional conduction circuit is connected to the second terminal of the sampling resistor, and the output terminal of the unidirectional conduction circuit is connected to the first connection node, and the unidirectional conduction circuit is used to transmit the test voltage to the first connection node in one direction. The first voltage sampling circuit is connected to the first connection node and the third sampling terminal of the controller respectively. The first voltage sampling circuit is used to sample the voltage VS3 of the first connection node and output the first sampled voltage to the controller. The second voltage sampling circuit is connected to the second connection node and the fourth sampling terminal of the controller, respectively. The second voltage sampling circuit is used to sample the voltage of the second connection node and output the second sampled voltage to the controller. The third voltage sampling circuit is connected to the third connection node and the fifth sampling terminal of the controller, respectively. The third voltage sampling circuit is used to sample the voltage of the third connection node and output the third sampled voltage to the controller.

7. The atomizing circuit as described in claim 6, characterized in that, The second switching circuit includes a fifth electronic switching transistor; The first terminal of the fifth electronic switch is connected to the second positive voltage terminal, the second terminal of the fifth electronic switch is connected to the first terminal of the sampling resistor, and the control terminal of the fifth electronic switch constitutes the control terminal of the second switching circuit and is used to input the enable signal.

8. The atomizing circuit as described in claim 6, characterized in that, The unidirectional conduction circuit includes a diode; The anode of the diode is connected to the second end of the sampling resistor, and the cathode of the diode is connected to the first connection node.

9. The atomizing circuit as described in claim 6, characterized in that, The first voltage sampling circuit includes a fifth resistor, a first Zener diode, and a second capacitor; The first end of the fifth resistor is connected to the first connection node, the second end of the fifth resistor, the first end of the second capacitor, the cathode of the first Zener diode and the third sampling terminal of the controller are connected, and the second end of the second capacitor and the anode of the first Zener diode are grounded. The second voltage sampling circuit includes a sixth resistor, a second Zener diode, and a third capacitor; The first end of the sixth resistor is connected to the second connection node, the second end of the sixth resistor, the first end of the third capacitor, the cathode of the second Zener diode and the fourth sampling terminal of the controller are connected, and the second end of the third capacitor and the anode of the second Zener diode are grounded. The third voltage sampling circuit includes a seventh resistor, a third Zener diode, and a fourth capacitor; The first end of the seventh resistor is connected to the third connection node, the second end of the seventh resistor, the first end of the fourth capacitor, the cathode of the third Zener diode, and the fifth sampling terminal of the controller are connected, and the second end of the fourth capacitor and the anode of the third Zener diode are grounded.

10. An atomizing device, characterized in that, The device includes an atomizing component and an atomizing circuit as described in any one of claims 1 to 9. The atomizing component includes at least a first heating element, a second heating element, and a heating cavity. The first heating element and the second heating element are segmented along the heating cavity. The atomizing component also includes a bridging resistor. The first heating element, the second heating element, and the bridging resistor are connected in ohms from end to end. The three connection nodes of the first heating element, the second heating element, and the bridging resistor are respectively connected to the atomizing circuit.

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