Heating module and atomizing heater

Abstract

The utility model relates to a heating module and an atomizing heater, and relates to the technical field of electronic circuits. The heating module comprises a heating connection end, a resistance identification circuit and a voltage output circuit. Wherein the heating connecting end is used for connecting a medium to be heated. The resistance value identification circuit is connected with the heating connection end and used for detecting the resistance value of the medium to be heated so as to generate a voltage selection signal. And the voltage output circuit is connected with the heating connection end and the resistance value identification circuit and is used for heating the medium to be heated according to the voltage selection signal. In this way, the effect that the to-be-heated media with different resistance values are heated through different voltages is achieved, and then the resistance value compatibility of the matched to-be-heated media is improved.

Description

Technical Field

[0001] This application relates to the field of electronic circuit technology, and in particular to a heating module and an atomizing heater. Background Technology

[0002] Atomizing heating devices heat liquid or solid media, causing them to rapidly transform into gaseous or microparticle forms for users to inhale or release aromas. The atomizing heating device heats the media by applying voltage to both ends of the media to allow current to flow through it, combined with the media's own resistance.

[0003] The resistance of the medium to be heated is usually relatively fixed, for example, between 0.8Ω and 1.5Ω. This makes the voltage supplied to the medium by the current atomizing heating device relatively fixed. If the resistance of the medium changes due to changes in the material of the medium or other requirements, the current atomizing heating device cannot apply an effective heating voltage to the medium, and thus cannot atomize the medium.

[0004] Therefore, improving the compatibility of atomizing heaters is an urgent problem to be solved. Utility Model Content

[0005] This application provides a heating module that improves the compatibility of atomizing heaters, thereby at least partially solving the above-mentioned technical problems.

[0006] To achieve the above objectives, according to a first aspect of this application, a heating module is provided, comprising:

[0007] Heating connection end, used to connect the medium to be heated;

[0008] A resistance identification circuit, connected to the heating connection terminal, is used to detect the resistance value of the medium to be heated in order to generate a voltage selection signal;

[0009] A voltage output circuit, connected to the heating connection terminal and the resistance identification circuit, is used to heat the medium to be heated according to the voltage selection signal.

[0010] Optionally, the heating connection terminal includes a positive electrode connection terminal and a negative electrode connection terminal;

[0011] The positive terminal is connected to the voltage output circuit, and the negative terminal is connected to the resistance identification circuit; the medium to be heated is connected between the positive terminal and the negative terminal.

[0012] Optionally, the resistance identification circuit includes a first resistor, a first voltage divider circuit, and a controller;

[0013] The first end of the first resistor is connected to the negative terminal at the first node, and the second end of the first resistor is grounded.

[0014] The first voltage divider circuit is connected to the first node and is used to divide the voltage value of the first node to obtain the divided voltage value.

[0015] The controller is connected to the first voltage divider circuit and is used to obtain the resistance value based on the voltage divider value in order to generate the voltage selection signal.

[0016] Optionally, the first voltage divider circuit includes a second resistor and a third resistor;

[0017] The first end of the second resistor is connected to the first node, and the second end is connected to the first end of the third resistor and the controller; the second end of the third resistor is grounded.

[0018] Optionally, the voltage selection signal includes a first selection signal and a second selection signal; the voltage output circuit includes a first output sub-circuit and a second output sub-circuit.

[0019] The first output sub-circuit is connected to the voltage source, the resistance identification circuit and the heating connection terminal, and is used to output the output voltage of the voltage source to the heating connection terminal according to the first selection signal;

[0020] The second output sub-circuit is connected to the voltage source, the resistance identification circuit and the heating connection terminal, and is used to boost the output voltage to obtain a boost voltage, and output the boost voltage to the heating connection terminal according to the second selection signal.

[0021] Optionally, the first output sub-circuit includes an anti-backflow switch and a first transistor;

[0022] The backflow prevention switch includes a first terminal connected to the voltage source, a second terminal connected to the positive terminal, and a control terminal connected to the first transistor.

[0023] The first transistor includes a control electrode connected to the controller, a first electrode connected to the control terminal of the anti-backflow switch, and a grounded second electrode.

[0024] Optionally, the backflow prevention switch includes a second transistor, a third transistor, and a fourth resistor;

[0025] The first electrode of the second transistor is connected to the first electrode of the third transistor and the first terminal of the fourth resistor; the second electrode of the second transistor is connected to the voltage source; and the control electrode is connected to the first electrode of the first transistor and the second terminal of the fourth resistor.

[0026] The second electrode of the third transistor is connected to the positive terminal, and the control electrode is connected to the first electrode of the first transistor.

[0027] Optionally, the second output sub-circuit includes a boost unit, an anti-reverse current switch, and a fourth transistor;

[0028] The anti-reverse current switch includes a first terminal connected to the boost unit, a second terminal connected to the positive terminal, and a control terminal connected to the fourth transistor.

[0029] The boost unit is connected to the voltage source;

[0030] The fourth transistor includes a control electrode connected to the controller, a first electrode connected to the control terminal of the anti-reverse current switch, and a grounded second electrode.

[0031] Optionally, the anti-reverse current switch includes a fifth transistor, a sixth transistor, and a fifth resistor;

[0032] The first electrode of the fifth transistor is connected to the first electrode of the sixth transistor and the first end of the fifth resistor; the second electrode of the fifth transistor is connected to the boost unit; and the control electrode is connected to the second end of the fifth resistor and the first electrode of the fourth transistor.

[0033] The second electrode of the sixth transistor is connected to the positive terminal, and the control electrode is connected to the first electrode of the fourth transistor.

[0034] Optionally, it also includes a plug-in / plug-out detection circuit connected to the positive terminal, used to identify the action of the medium to be heated being connected to or disconnected between the positive terminal and the negative terminal, and output an identification signal;

[0035] The controller also includes a signal receiving terminal connected to the insertion / removal detection circuit, used to enter the working state according to the identification signal.

[0036] Optionally, the insertion / removal detection circuit includes a reference potential sub-circuit connected to the positive terminal at the second node and a second voltage divider sub-circuit.

[0037] The reference potentiometer sub-circuit is used to provide a reference signal to the second node;

[0038] The second voltage divider circuit divides the voltage value of the second node to obtain the identification signal.

[0039] Optionally, the reference potentiometer circuit includes a diode and a sixth resistor;

[0040] The first end of the sixth resistor is connected to a voltage source, and the second end is connected to the anode of the diode; the cathode of the diode is connected to the second node.

[0041] Optionally, the second voltage divider circuit includes a seventh resistor and an eighth resistor;

[0042] The first end of the seventh resistor is connected to the second node, and the second end is connected to the controller and the first end of the eighth resistor;

[0043] The second terminal of the eighth resistor is grounded.

[0044] Optionally, the controller further includes a first ground signal terminal and a second ground signal terminal, and the second voltage divider circuit further includes a ninth resistor;

[0045] The controller is used to generate a first detection signal and a second detection signal based on the identification signal;

[0046] The second end of the eighth resistor is connected to the first ground signal end to receive the first detection signal;

[0047] The first end of the ninth resistor is connected to the second end of the seventh resistor and the signal receiving end of the controller, and the second end of the ninth resistor is connected to the second ground signal end to receive the second detection signal.

[0048] Optionally, a protection circuit connected to the negative terminal is also included to control the connection between the negative terminal and ground.

[0049] Optionally, the protection circuit includes a seventh transistor, which includes a control terminal connected to the controller, a first electrode connected to the negative terminal, and a grounded second electrode.

[0050] According to a second aspect of this application, an atomizing heater is provided, including the heating module described above.

[0051] In summary, in the heating module of this application embodiment, firstly, the medium to be heated is connected to the heating connection terminal, and the resistance value of the medium to be heated is detected by the resistance recognition circuit to adapt to the medium with different resistance characteristics, thereby generating a voltage selection signal based on the resistance value. Then, the voltage output circuit adjusts the voltage output to the heating connection terminal according to the voltage selection signal, thereby achieving the effect of heating the medium with different resistance values ​​using different voltages, thus improving the resistance compatibility of the adapted medium.

[0052] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0053] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0054] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0055] Figure 1 This is a block diagram of a heating module provided in an exemplary embodiment of this disclosure;

[0056] Figure 2 This is a schematic diagram of a heating module provided in an exemplary embodiment of this disclosure;

[0057] Figure 3 This is a circuit connection diagram of the heating module provided in an exemplary embodiment of this disclosure;

[0058] Figure 4 This is a circuit connection diagram of the boost unit provided in an exemplary embodiment of this disclosure;

[0059] Figure 5 This is a block diagram of another heating module provided in an exemplary embodiment of this disclosure.

[0060] Explanation of reference numerals in the attached diagram: 1. Heating connection terminal; 2. Resistance identification circuit; 21. First voltage divider circuit; 3. Voltage output circuit; 31. First output sub-circuit; 311. Anti-backflow switch; 32. Second output sub-circuit; 321. Boost unit; 322. Anti-reverse current switch; 4. Controller; 5. Insertion / removal detection circuit; 51. Reference potentiometer circuit; 52. Second voltage divider circuit; 6. Protection circuit. Detailed Implementation

[0061] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0062] According to the first aspect of this application, referring to Figure 1This disclosure provides a heating module, including a heating connection terminal 1, a resistance identification circuit 2, and a voltage output circuit 3. The heating connection terminal 1 is used to connect a medium to be heated. The resistance identification circuit 2 is connected to the heating connection terminal 1 and is used to detect the resistance value of the medium to be heated to generate a voltage selection signal. The voltage output circuit 3 is connected to the heating connection terminal 1 and the resistance identification circuit 2, and is used to heat the medium to be heated according to the voltage selection signal.

[0063] In the above embodiment, firstly, the medium to be heated is connected to the heating connection terminal 1, and the resistance value of the medium to be heated is detected by the resistance recognition circuit 2 to adapt to the medium with different resistance characteristics, thereby generating a voltage selection signal based on the resistance value. Then, the voltage output circuit 3 adjusts the voltage output to the heating connection terminal 1 according to the voltage selection signal, thereby achieving the effect of heating the medium with different resistance values ​​using different voltages, thus improving the resistance compatibility of the adapted medium.

[0064] Reference Figure 2 In some embodiments, the heating connection terminal 1 includes a positive connection terminal H+ and a negative connection terminal H-; the positive connection terminal H+ is connected to the voltage output circuit 3, and the negative connection terminal H- is connected to the resistance identification circuit 2; the medium to be heated is connected between the positive connection terminal H+ and the negative connection terminal H-.

[0065] As an example, the positive terminal H+ and the negative terminal H- are made of conductive materials, and the medium to be heated can be electrically connected to the positive terminal H+ and the negative terminal H- through contact.

[0066] Reference Figure 3 In some embodiments, the resistance identification circuit 2 includes a first resistor R1, a first voltage divider circuit 21, and a controller 4. The first terminal of the first resistor R1 is connected to the negative terminal H- at the first node N1, and the second terminal of the first resistor R1 is grounded. The first voltage divider circuit 21 is connected to the first node N1 and is used to divide the voltage value at the first node N1 to obtain a divided voltage value. The controller 4 is connected to the first voltage divider circuit 21 and is used to obtain the resistance value based on the divided voltage value to generate a voltage selection signal.

[0067] As an example, when the medium to be heated is connected between the positive terminal H+ and the negative terminal H-, the medium to be heated is connected in series with the first resistor R1. The two ends of the first resistor R1 are connected to the first node N1 and ground, respectively. That is, the voltage value of the first node N1 is equal to the voltage drop across the first resistor R1. Since the resistance value of the first resistor R1 is known, the current in the branch where the medium to be heated is connected in series with the first resistor R1 can be obtained, so it is convenient to calculate the resistance value of the medium to be heated based on the voltage value of the first node N1.

[0068] As an example, since the voltage sampling range of controller 4 is relatively small, if the voltage value input to controller 4 exceeds the range, it may damage controller 4. The maximum voltage that controller 4 can sample should be less than the supply voltage of controller 4 (e.g., 2.8V). To ensure that the voltage input to controller 4 is within the range, the voltage value of the first node N1 is divided by the first voltage divider circuit 21 to obtain the divided voltage value. Then, the voltage value of the first node N1 is obtained based on the divided voltage value according to the parameters of the first voltage divider circuit 21. That is, the first voltage divider circuit 21 is used to scale the voltage value of the first node N1 to obtain the divided voltage value.

[0069] Reference Figure 3 In some embodiments, the first voltage divider circuit 21 includes a second resistor R2 and a third resistor R3. The first end of the second resistor R2 is connected to the first node N1, and the second end is connected to the first end of the third resistor R3 and the controller 4; the second end of the third resistor R3 is grounded.

[0070] As an example, by adjusting the resistance values ​​of the first resistor R1 and the second resistor R2, the scaling ratio of the voltage value at the first node N1 can be adjusted. For example, the voltage divider value can be adjusted to two-thirds of the voltage value at the first node N1. That is, Vheater- = Vdet * 3 / 2, where Vheater- is the voltage value at the first node N1 and Vdet is the voltage divider value. Then, the resistance value of the medium to be heated can be expressed as:

[0071] Rpod=(VBAT-Vheater-) / (Vheater- / R11);

[0072] Where VBAT is the output voltage of the voltage source. R11 is the resistance value of the first resistor R1.

[0073] Reference Figure 3 In some embodiments, the voltage selection signal includes a first selection signal and a second selection signal; the voltage output circuit 3 includes a first output sub-circuit 31 and a second output sub-circuit 32. The first output sub-circuit 31 is connected to the voltage source, the resistance identification circuit 2, and the heating connection terminal 1, and is used to output the output voltage of the voltage source to the heating connection terminal 1 according to the first selection signal. The second output sub-circuit 32 is connected to the voltage source, the resistance identification circuit 2, and the heating connection terminal 1, and is used to boost the output voltage to obtain a boosted voltage, and output the boosted voltage to the heating connection terminal 1 according to the second selection signal.

[0074] As an example, the voltage source can be an energy storage battery, and the output voltage of the voltage source can be 4.2V. The boost voltage can be 20V.

[0075] As an example, the first output sub-circuit 31 and the second output sub-circuit 32 can both be active high. That is, when the first selection signal is high and the second selection signal is low, the first output sub-circuit 31 operates, outputting the voltage from the voltage source to the heating connection terminal 1, while the second output sub-circuit 32 does not operate. When the first selection signal is low and the second selection signal is high, the first output sub-circuit 31 does not operate, and the second output sub-circuit 32 outputs a boost voltage to the heating connection terminal 1.

[0076] Reference Figure 3 In some embodiments, the first output sub-circuit 31 includes an anti-backflow switch 311 and a first transistor Q1. The anti-backflow switch 311 includes a first terminal connected to a voltage source, a second terminal connected to the positive terminal H+, and a control terminal connected to the first transistor Q1. The first transistor Q1 includes a control electrode connected to the controller 4, a first electrode connected to the control terminal of the anti-backflow switch 311, and a grounded second electrode.

[0077] As an example, the backflow prevention switch 311 includes a second transistor Q2, a third transistor Q3, and a fourth resistor R4. The first electrode of the second transistor Q2 is connected to the first electrode of the third transistor Q3 and the first terminal of the fourth resistor R4. The second electrode of the second transistor Q2 is connected to a voltage source, and its control electrode is connected to the first electrode of the first transistor Q1 and the second terminal of the fourth resistor R4. The second electrode of the third transistor Q3 is connected to the positive terminal H+, and its control electrode is connected to the first electrode of the first transistor Q1.

[0078] In this configuration, the first transistor Q1 can be an N-type transistor, while the second transistor Q2 and the third transistor Q3 can be P-type transistors with a body diode D. As an example, when the first selection signal is high, the first transistor Q1 is turned on, grounding the control electrodes of the second transistor Q2 and the third transistor Q3. The second transistor Q2 conducts through its body diode D, and the third transistor Q3 conducts, thereby transmitting the voltage source to the positive terminal H+.

[0079] As an example, when the first selection signal is a low-level signal and the second selection signal is a high-level signal, the second output sub-circuit 32 outputs a boost voltage. The first transistor Q1, the second transistor Q2 and the third transistor Q3 are disconnected. The boost voltage flows to the second transistor Q2 through the body diode D of the third transistor Q3. However, the body diode D of the second transistor Q2 is reverse-cut off and does not conduct. Therefore, the boost voltage will not flow back to the voltage source and damage the voltage source.

[0080] In the above embodiment, the back-to-back connection between the second transistor Q2 and the third transistor Q3 enables the output voltage of the voltage source to be output to the positive terminal H+ according to the first selection signal. However, the boost voltage will not flow back to the voltage source through the second transistor Q2 and the third transistor Q3, thus avoiding the leakage problem of the body diode D.

[0081] Reference Figure 3 In some embodiments, the second output sub-circuit 32 includes a boost unit 321, a reverse current protection switch 322, and a fourth transistor Q4. The reverse current protection switch 322 includes a first terminal connected to the boost unit 321, a second terminal connected to the positive terminal H+, and a control terminal connected to the fourth transistor Q4. The boost unit 321 is connected to a voltage source, and the fourth transistor Q4 includes a control electrode connected to the controller 4, a first electrode connected to the control terminal of the reverse current protection switch 322, and a grounded second electrode.

[0082] Combination Figure 4 As an example, the boost unit 321 includes a boost IC, a first feedback resistor Rup, a second feedback resistor Rdown, and several capacitors. The input terminal of the boost IC is connected to a voltage source, and the output terminal is connected to the first feedback resistor Rup and the second output sub-circuit 32. The first feedback resistor Rup and the second feedback resistor Rdown are connected in series, and the series connection point is connected to the feedback terminal of the boost IC to adjust the boost voltage. The first terminal of each capacitor is connected to the output terminal of the boost IC, and the second terminal is grounded to filter the boost voltage and make the boost voltage more stable. For example, in the above embodiment, firstly, a first selection signal or a second selection signal is generated based on the resistance value of the medium to be heated to control one of the first output sub-circuit 31 and the second output sub-circuit 32 to be turned on. If the first output sub-circuit 31 is turned on, the voltage of the output voltage source is sent to the heating connection terminal 1. If the second output sub-circuit 32 is turned on, the output voltage is boosted before being sent to the heating connection terminal 1, thereby achieving the effect of outputting different voltages to the heating connection terminal 1 according to the resistance value of the medium to be heated.

[0083] As an example, the anti-reverse current switch 322 includes a fifth transistor Q5, a sixth transistor Q6, and a fifth resistor R5. The first electrode of the fifth transistor Q5 is connected to the first electrode of the sixth transistor Q6 and the first terminal of the fifth resistor R5. The second electrode of the fifth transistor Q5 is connected to the boost unit 321, and its control electrode is connected to the second terminal of the fifth resistor R5 and the first electrode of the fourth transistor Q4. The second electrode of the sixth transistor Q6 is connected to the positive terminal H+, and its control electrode is connected to the first electrode of the fourth transistor Q4.

[0084] In this configuration, the fourth transistor Q4 can be an N-type transistor, while the fifth transistor Q5 and the sixth transistor Q6 can be P-type transistors with a body diode D. As an example, when the second selection signal is high, the fourth transistor Q4 is turned on, grounding the control electrodes of the fifth transistor Q5 and the sixth transistor Q6. The fifth transistor Q5 conducts through its body diode D, and the sixth transistor Q6 conducts, thereby transmitting the boosted voltage to the positive terminal H+.

[0085] Reference Figure 5 In some embodiments, the heating module further includes a plug-in / plug-out detection circuit 5 connected to the positive terminal H+, used to identify the action of the medium to be heated being connected to or disconnected between the positive terminal H+ and the negative terminal H-, and output an identification signal. The controller 4 also includes a signal receiving terminal connected to the plug-in / plug-out detection circuit 5, used to enter the working state according to the identification signal.

[0086] As an example, when the identification signal is a high-level signal, it indicates that the medium to be heated is not connected between the positive terminal H+ and the negative terminal H-; when the identification signal is a low-level signal, it indicates that the medium to be heated has been inserted between the positive terminal H+ and the negative terminal H-.

[0087] In the above embodiment, the insertion / removal detection circuit 5 identifies whether the medium to be heated has been connected or disconnected between the positive terminal H+ and the negative terminal H-, and outputs a corresponding identification signal. Furthermore, when no medium to be heated is inserted, the controller 4 can operate in a low-power state. Only after the medium to be heated is connected between the positive terminal H+ and the negative terminal H- does the controller 4 enter the working state, thereby reducing overall power consumption.

[0088] In some embodiments, the insertion / removal detection circuit 5 includes a reference potentiometer sub-circuit 51 connected to the positive terminal H+ at the second node N2 and a second voltage divider sub-circuit 52. The reference potentiometer sub-circuit 51 provides a reference signal to the second node N2. The second voltage divider circuit 52 divides the voltage value at the second node N2 to obtain an identification signal.

[0089] Reference Figure 5 As an example, the reference potentiometer circuit 51 includes a diode D and a sixth resistor R6. The first terminal of the sixth resistor R6 is connected to a voltage source, and the second terminal is connected to the anode of the diode D; the cathode of the diode D is connected to the second node N2.

[0090] A step-down circuit can be installed between the first terminal of the sixth resistor R6 and the voltage source to reduce the output voltage of the voltage source before outputting it to the sixth resistor R6. A diode D is used to ensure unidirectional conduction of the output voltage after the voltage drop, preventing backflow into the voltage source when a boost voltage is supplied to the heating connection terminal 1.

[0091] As an example, the second voltage divider circuit 52 includes a seventh resistor R7 and an eighth resistor R8. The first terminal of the seventh resistor R7 is connected to the second node N2, and the second terminal is connected to the controller 4 and the first terminal of the eighth resistor R8; the second terminal of the eighth resistor R8 is grounded.

[0092] In the above embodiment, the voltage value of the second node N2 is divided by the seventh resistor R7 and the eighth resistor R8 so that the controller 4 can sample the potential of the positive terminal H+. When the medium to be heated is not connected between the positive terminal H+ and the negative terminal H-, the voltage value of the second node N2 is basically equal to the reference signal. At this time, the voltage value of the second node N2 is divided to obtain the identification signal of the high-level state. When the medium to be heated is connected between the positive terminal H+ and the negative terminal H-, the positive terminal H+ is grounded through the medium to be heated and the negative terminal H-, so that the voltage value of the second node N2 is basically zero. At this time, the voltage value of the second node N2 is divided to obtain the identification signal of the low-level state.

[0093] As an example, when the back-to-back structure formed by the fifth transistor Q5 and the sixth transistor Q6 is disconnected, the reference signal provided by the reference potentiometer circuit 51 to the second node N2 will not flow back to the boost unit 321 and will instead pass through the second feedback resistor Rdown in the boost unit 321 to ground, forming a loop and causing leakage. Furthermore, the fifth transistor Q5 and the sixth transistor Q6 isolate the voltage value of the second node N2, enabling the voltage value of the second node N2 to quickly recover to the reference signal when the medium to be heated is removed, thus avoiding the problem of delayed recognition signal generation.

[0094] Reference Figure 3 In some embodiments, the controller 4 further includes a first ground signal terminal and a second ground signal terminal, and the second voltage divider circuit 52 further includes a ninth resistor R9. The controller 4 is used to generate a first detection signal and a second detection signal based on the identification signal. The second terminal of the eighth resistor R8 is connected to the first ground signal terminal to receive the first detection signal. The first terminal of the ninth resistor R9 is connected to the second terminal of the seventh resistor R7 and the signal receiving terminal of the controller 4, and the second terminal of the ninth resistor R9 is connected to the second ground signal terminal to receive the second detection signal.

[0095] As an example, the resistance values ​​of the eighth resistor R8 and the ninth resistor R9 are different. When the first output sub-circuit 31 is working, the controller 4 outputs a first ground signal, causing the eighth resistor R8 to be grounded internally through the controller 4. At this time, the eighth resistor R8 and the seventh resistor R7 form a voltage divider structure to divide the voltage value of the second node N2. When the second output sub-circuit 32 is working, the controller 4 outputs a second ground signal, causing the ninth resistor R9 to be grounded internally through the controller 4. At this time, the ninth resistor R9 and the seventh resistor R7 form a voltage divider structure to divide the voltage value of the second node N2. In this way, by setting the resistance values ​​of the eighth resistor R8 and the ninth resistor R9, different voltage divider structures can be used when the voltage value of the second node N2 is different, so that the identification signal is always within the range of the controller 4.

[0096] As an example, since the identification signal is used to characterize the voltage value of the second node N2, that is, the voltage value of the positive terminal H+, the controller 4 can also sample the voltage output by the first output sub-circuit 31 and the second output sub-circuit 32 through the identification signal in order to realize voltage monitoring during the heating process of the medium to be heated.

[0097] Reference Figure 5 In some embodiments, the heating module further includes a protection circuit 6 connected to the negative terminal H-, used to control the connection and disconnection between the negative terminal H- and ground.

[0098] Combination Figure 3 In some embodiments, the protection circuit 6 includes a seventh transistor Q7, which includes a control terminal connected to the controller 4, a first electrode connected to the negative terminal H-, and a grounded second electrode.

[0099] In the above embodiment, multiple protection functions are achieved through protection circuit 6. That is, when voltage output circuit 3 is turned on, controller 4 is also needed to control the seventh transistor Q7 to turn on, so as to connect the negative terminal H- and ground, thereby forming a complete circuit and avoiding safety problems caused by short circuit.

[0100] Combination Figure 3 and Figure 5 This disclosure exemplarily describes the operation of the heating module:

[0101] First, the resistance value of the medium to be heated is identified. After the medium to be heated is connected to the positive terminal H+ and the negative terminal H-, the insertion / removal detection circuit 5 outputs a low-level identification signal to the signal receiving terminal of the controller 4. The controller 4 is awakened when its signal receiving terminal is in a low-level state, enters the working state, and outputs a first selection signal to the first output sub-circuit 31. The first output sub-circuit 31 supplies power to the positive terminal H+, and the supply voltage is the output voltage of the voltage source. At this time, the seventh transistor Q7 is turned off, and the medium to be heated and the first resistor R1 form a series branch. The controller 4 calculates the resistance value of the medium to be heated by calculating the voltage value of the first node N1.

[0102] Then, different voltages are selected to heat the medium based on the resistance value. Specifically, controller 4 controls one of the first output sub-circuit 31 and the second output sub-circuit 32 to conduct, while simultaneously controlling the seventh transistor Q7 to conduct, thus forming a complete circuit. For example, if the resistance value is low, controller 4 outputs a first selection signal to control the first output sub-circuit 31 to conduct, providing the output voltage of the voltage source to heat the medium. If the resistance value is high, controller 4 outputs a second selection signal to control the second output sub-circuit 32 to conduct, providing a boosted voltage (after boosting the output voltage) to heat the medium.

[0103] Finally, during the heating process of the medium to be heated, the controller 4, through the second voltage divider circuit 52, can sample the voltage value of the second node N2 in real time. Since the second node N2 and the positive terminal H+ are at the same potential, the controller 4 can sample the voltage of the positive terminal H+ through its signal receiving terminal. Simultaneously, the controller 4 also samples the voltage value of the first node N1 in real time to obtain the real-time resistance value of the medium to be heated. Thus, during the heating process of the medium to be heated, the controller 4 can make real-time adjustments based on the voltage of the positive terminal H+ and the resistance value of the medium to achieve constant pressure heating or constant power heating.

[0104] It should be noted that in this embodiment, the first electrode of each transistor can be the input terminal, and the second electrode can be the output terminal. That is, if the transistor is an N-type transistor, the first electrode can be the drain and the second electrode can be the source. If the transistor is a P-type transistor, the first electrode can be the source and the second electrode can be the drain.

[0105] According to a second aspect of this disclosure, an atomizing heater is provided, which includes the heating module described above. This atomizing heater possesses all the beneficial effects of the heating module described above, which will not be elaborated further herein.

[0106] In the description of this application, 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0107] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0108] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0109] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A heating module, characterized in that, include: Heating connection end, used to connect the medium to be heated; A resistance identification circuit, connected to the heating connection terminal, is used to detect the resistance value of the medium to be heated in order to generate a voltage selection signal; A voltage output circuit, connected to the heating connection terminal and the resistance identification circuit, is used to heat the medium to be heated according to the voltage selection signal.

2. The heating module according to claim 1, characterized in that, The heating connection terminal includes a positive electrode connection terminal and a negative electrode connection terminal; The positive terminal is connected to the voltage output circuit, and the negative terminal is connected to the resistance identification circuit; the medium to be heated is connected between the positive terminal and the negative terminal.

3. The heating module according to claim 2, characterized in that, The resistance identification circuit includes a first resistor, a first voltage divider circuit, and a controller; The first end of the first resistor is connected to the negative terminal at the first node, and the second end of the first resistor is grounded. The first voltage divider circuit is connected to the first node and is used to divide the voltage value of the first node to obtain the divided voltage value. The controller is connected to the first voltage divider circuit and is used to obtain the resistance value based on the voltage divider value in order to generate the voltage selection signal.

4. The heating module according to claim 3, characterized in that, The first voltage divider circuit includes a second resistor and a third resistor; The first end of the second resistor is connected to the first node, and the second end is connected to the first end of the third resistor and the controller; the second end of the third resistor is grounded.

5. The heating module according to claim 3, characterized in that, The voltage selection signal includes a first selection signal and a second selection signal; the voltage output circuit includes a first output sub-circuit and a second output sub-circuit. The first output sub-circuit is connected to the voltage source, the resistance identification circuit and the heating connection terminal, and is used to output the output voltage of the voltage source to the heating connection terminal according to the first selection signal; The second output sub-circuit is connected to the voltage source, the resistance identification circuit and the heating connection terminal, and is used to boost the output voltage to obtain a boost voltage, and output the boost voltage to the heating connection terminal according to the second selection signal.

6. The heating module according to claim 5, characterized in that, The first output sub-circuit includes an anti-backflow switch and a first transistor; The backflow prevention switch includes a first terminal connected to the voltage source, a second terminal connected to the positive terminal, and a control terminal connected to the first transistor. The first transistor includes a control electrode connected to the controller, a first electrode connected to the control terminal of the anti-backflow switch, and a grounded second electrode.

7. The heating module according to claim 6, characterized in that, The backflow prevention switch includes a second transistor, a third transistor, and a fourth resistor; The first electrode of the second transistor is connected to the first electrode of the third transistor and the first terminal of the fourth resistor; the second electrode of the second transistor is connected to the voltage source; and the control electrode is connected to the first electrode of the first transistor and the second terminal of the fourth resistor. The second electrode of the third transistor is connected to the positive terminal, and the control electrode is connected to the first electrode of the first transistor.

8. The heating module according to claim 5, characterized in that, The second output sub-circuit includes a boost unit, an anti-reverse current switch, and a fourth transistor; The anti-reverse current switch includes a first terminal connected to the boost unit, a second terminal connected to the positive terminal, and a control terminal connected to the fourth transistor. The boost unit is connected to the voltage source; The fourth transistor includes a control electrode connected to the controller, a first electrode connected to the control terminal of the anti-reverse current switch, and a grounded second electrode.

9. The heating module according to claim 8, characterized in that, The anti-reverse current switch includes a fifth transistor, a sixth transistor, and a fifth resistor; The first electrode of the fifth transistor is connected to the first electrode of the sixth transistor and the first end of the fifth resistor; the second electrode of the fifth transistor is connected to the boost unit; and the control electrode is connected to the second end of the fifth resistor and the first electrode of the fourth transistor. The second electrode of the sixth transistor is connected to the positive terminal, and the control electrode is connected to the first electrode of the fourth transistor.

10. The heating module according to claim 3, characterized in that, It also includes a plug-in / plug-out detection circuit connected to the positive terminal, used to identify the action of the medium to be heated being connected to or disconnected from the positive terminal and the negative terminal, and output an identification signal; The controller also includes a signal receiving terminal connected to the insertion / removal detection circuit, used to enter the working state according to the identification signal.

11. The heating module according to claim 10, characterized in that, The insertion / removal detection circuit includes a reference potential sub-circuit and a second voltage divider sub-circuit connected to the positive terminal at the second node. The reference potentiometer sub-circuit is used to provide a reference signal to the second node; The second voltage divider circuit divides the voltage value of the second node to obtain the identification signal.

12. The heating module according to claim 11, characterized in that, The reference potentiometer circuit includes a diode and a sixth resistor; The first end of the sixth resistor is connected to a voltage source, and the second end is connected to the anode of the diode; the cathode of the diode is connected to the second node.

13. The heating module according to claim 12, characterized in that, The second voltage divider circuit includes a seventh resistor and an eighth resistor; The first end of the seventh resistor is connected to the second node, and the second end is connected to the controller and the first end of the eighth resistor; The second terminal of the eighth resistor is grounded.

14. The heating module according to claim 13, characterized in that, The controller also includes a first grounding signal terminal and a second grounding signal terminal, and the second voltage divider circuit also includes a ninth resistor; The controller is used to generate a first detection signal and a second detection signal based on the identification signal; The second end of the eighth resistor is connected to the first ground signal end to receive the first detection signal; The first end of the ninth resistor is connected to the second end of the seventh resistor and the signal receiving end of the controller, and the second end of the ninth resistor is connected to the second ground signal end to receive the second detection signal.

15. The heating module according to claim 3, characterized in that, It also includes a protection circuit connected to the negative terminal, used to control the connection and disconnection between the negative terminal and ground.

16. The heating module according to claim 15, characterized in that, The protection circuit includes a seventh transistor, which includes a control terminal connected to the controller, a first electrode connected to the negative terminal, and a grounded second electrode.

17. An atomizing heater, characterized in that, Includes the heating module as described in any one of claims 1 to 16.

Images