Short-circuit protection circuit and atomization equipment

Abstract

The utility model discloses a short-circuit protection circuit and atomization equipment. The circuit comprises a control module, a first pin is electrically connected with a power input end, the control module further comprises a comparator, a first input end of the comparator is electrically connected with the first pin, and a second input end of the comparator is electrically connected with the second pin; the first end of the heating module is electrically connected with the second pin, and the second end of the heating module is grounded; the first end of the switch module is electrically connected with the power input end, the second end of the switch module is electrically connected with the first end of the heating module, and the third end of the switch module is electrically connected with the third pin; when the comparator receives a low-level signal from the heating module through the second pin, the control module outputs the low-level signal to the switch module through the third pin, so that the switch module is cut off. According to the short-circuit protection circuit and the atomization equipment provided by the embodiment of the invention, the safety and the stability of the atomization equipment in the using process can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of short - circuit protection, in particular to a short - circuit protection circuit and an atomizing device. Background Art

[0002] The atomizing device mainly consists of components such as a battery module and a heating module. The battery module supplies power to the atomizing device, and the heating module (such as a heating wire) is used for heating to make the atomizing device generate vapor. When the heating module is short - circuited or its resistance value becomes small, the current will increase sharply, resulting in overheating and posing a certain safety hazard to users.

[0003] In the related art, the short - circuit protection function of the atomizing device is generally realized by hardware control. However, this method will increase the complexity of the circuit structure of the atomizing device. And based on software control, the atomizing device needs to have a certain computing power and analog - to - digital conversion sampling function to detect the change of the resistance value of the heating module in real time. However, there is a certain response delay in detection and the software is prone to false touch, reducing the safety and stability of the atomizing device during use. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. For this reason, the utility model provides a short - circuit protection circuit and an atomizing device, which can improve the safety and stability of the atomizing device during use.

[0005] According to the short - circuit protection circuit of the first - aspect embodiment of the utility model, the short - circuit protection circuit includes: a control module, the control module includes a first pin, a second pin and a third pin. The first pin is electrically connected to a power input terminal. The control module further includes a comparator. The first input terminal of the comparator is electrically connected to the first pin, and the second input terminal of the comparator is electrically connected to the second pin; a heating module, the first end of the heating module is electrically connected to the second pin, and the second end of the heating module is grounded; a switch module, the first end of the switch module is electrically connected to the power input terminal, the second end of the switch module is electrically connected to the first end of the heating module, and the third end of the switch module is electrically connected to the third pin; wherein, when the control module outputs a high - level signal to the switch module through the third pin, the switch module is turned on to enable the heating module to work; when the comparator receives a low - level signal from the heating module through the second pin, the control module outputs a low - level signal to the switch module through the third pin to make the switch module cut off.

[0006] In some embodiments, the short - circuit protection circuit further includes a first resistor. The control module further includes a first selector and a first register. The input end of the first selector is electrically connected to the second pin. The output end of the first selector is electrically connected to the second input end of the comparator. The first end of the heating module is electrically connected to the first end of the first resistor. The second end of the first resistor is electrically connected to the second pin. The first register is electrically connected to the input end of the first selector.

[0007] In some embodiments, the control module further includes a second selector, a first flip - flop, a clock signal unit, and an exclusive - OR gate unit. The output end of the comparator is electrically connected to the first input end of the first flip - flop and the first input end of the second selector. The second input end of the first flip - flop is electrically connected to the clock signal unit. The output end of the first flip - flop is electrically connected to the second input end of the second selector. The third input end of the second selector is electrically connected to the first register. The output end of the second selector is electrically connected to the first input end of the exclusive - OR gate unit. The second input end of the exclusive - OR gate unit is electrically connected to the first register. The output end of the exclusive - OR gate unit is electrically connected to the switch module.

[0008] In some embodiments, the switch module includes a first switching transistor and a second resistor. The first pole of the first switching transistor is electrically connected to the power input terminal. The second pole of the first switching transistor is electrically connected to the third pin. The third pole of the first switching transistor is electrically connected to the first end of the heating module. The first end of the second resistor is electrically connected to the second pole of the first switching transistor. The second end of the second resistor is electrically connected to the first pole of the first switching transistor.

[0009] In some embodiments, the control module further includes a series - resistor unit, a third resistor, a fourth resistor, a fifth resistor, a third selector, and a second register. The first end of the third resistor is electrically connected to the power input terminal. The first end of the fourth resistor is electrically connected to the second end of the third resistor. The second end of the fourth resistor is electrically connected to the second register. The first end of the series - resistor unit is electrically connected to the second end of the third resistor or the second end of the fourth resistor; The first end of the fifth resistor is electrically connected to the second register. The second end of the fifth resistor is grounded. The second end of the series - resistor unit is electrically connected to the first end of the fifth resistor or grounded. The second register is electrically connected to the first input end of the third selector. The second input end and the third input end of the third selector are electrically connected to the series - resistor unit. The output end of the third selector is electrically connected to the first input end of the comparator.

[0010] In some embodiments, the series resistance unit includes at least two resistors connected in series. The second input terminal of the third selector is electrically connected to the first end of the series resistance unit, and the third input terminal of the third selector is electrically connected to one end of any one of the at least two resistors connected in series.

[0011] In some embodiments, the circuit further includes a first switch, a light-emitting diode, and a sixth resistor. The control module further includes a fourth pin. The first end of the sixth resistor is electrically connected to the fourth pin, the second end of the sixth resistor is electrically connected to the negative electrode of the light-emitting diode, the positive electrode of the light-emitting diode is electrically connected to the power input terminal, the first end of the first switch is grounded, and the second end of the first switch is electrically connected to the negative electrode of the light-emitting diode.

[0012] In some embodiments, the circuit further includes a microphone module. The control module further includes a fifth pin and a sixth pin. The first end of the microphone module is electrically connected to the fifth pin, the second end of the microphone module is grounded, and the sixth pin is grounded.

[0013] In some embodiments, the circuit further includes a seventh resistor and a first capacitor. The first end of the seventh resistor is electrically connected to the first pin, the second end of the seventh resistor is electrically connected to the power input terminal, the first end of the first capacitor is electrically connected to the first end of the seventh resistor, and the second end of the first capacitor is grounded.

[0014] According to the atomizing device of the second aspect embodiment of the present invention, the atomizing device includes the short-circuit protection circuit of the first aspect embodiment.

[0015] According to the short - circuit protection circuit and the atomizing device of the embodiments of the present utility model, it has at least the following beneficial effects: This short - circuit protection circuit and atomizing device include a control module, a heating module, and a switching module. The control module includes a first pin, a second pin, and a third pin. The control module includes a comparator. The first input terminal of the comparator is electrically connected to the first pin, the second input terminal of the comparator is electrically connected to the second pin, the first terminal of the comparator is electrically connected to the first pin to form an internal reference voltage, the second input terminal of the comparator is electrically connected to the second pin, and the second pin is electrically connected to the first end of the heating module so that the second input terminal of the comparator monitors the voltage of the heating module. The control module outputs a high - level signal to the switching module through the third pin, and the switching module conducts to enable the heating module to work. By comparing the voltages of the first input terminal and the second input terminal of the comparator, it can be determined whether the heating module has a voltage drop due to being short - circuited or the resistance value decreasing. The comparator monitors the voltage state of the heating module in real - time and will detect this change. When the heating module is short - circuited or the resistance value decreases, the control module can output a low - level signal to the switching module through the third pin, so that the switching module is cut off, and the heating module is disconnected from the circuit to prevent overheating, which can improve the safety and stability during the use of the atomizing device.

[0016] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following further describes the present utility model in conjunction with the drawings and embodiments, where:

[0018] Figure 1 is a block diagram of the short - circuit protection circuit provided by the embodiment of the present utility model;

[0019] Figure 2 is a circuit diagram of the control module provided by the embodiment of the present utility model;

[0020] Figure 3 is another circuit diagram of the control module provided by the embodiment of the present utility model;

[0021] Figure 4 is a circuit diagram of the switching module provided by the embodiment of the present utility model;

[0022] Figure 5 is a circuit diagram of the series - resistance unit in the control module provided by the embodiment of the present utility model;

[0023] Figure 6 is another circuit diagram of the short - circuit protection circuit provided by the embodiment of the present utility model;

[0024] Figure 7The circuit diagram of the microphone module provided by the embodiment of the present utility model;

[0025] Figure 8 Another circuit diagram of the short - circuit protection circuit provided by the embodiment of the present utility model;

[0026] Figure 9 It is a schematic diagram of the atomization device provided by the embodiment of the present utility model. Detailed implementation manners

[0027] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model, and should not be construed as a limitation of the present utility model.

[0028] In the description of the present utility model, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0029] In the description of the present utility model, the meaning of "several" is more than one, the meaning of "multiple" is more than two, "greater than", "less than", "exceeding", etc. are understood as not including the original number, and "above", "below", "within", etc. are understood as including the original number. If there is a description of "first", "second", etc., it is only for the purpose of distinguishing technical features and should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0030] In the description of the present utility model, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0031] In the description of the present utility model, the description referring to terms such as "an embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0032] The atomizing device mainly consists of components such as a battery module and a heating module. The battery module powers the atomizing device, and the heating module (such as a heating wire) is used for heating to make the atomizing device generate steam. When the heating module is short-circuited or its resistance value becomes smaller, the current will increase sharply, resulting in overheating and posing a certain safety hazard to users.

[0033] In the related art, the short-circuit protection function of the atomizing device is generally implemented by hardware control. However, this method will increase the complexity of the circuit structure of the atomizing device. And based on software control, the atomizing device needs to have certain computing power and analog-to-digital conversion sampling functions to detect the change of the resistance value of the heating module in real time. However, there is a certain response delay in the detection and the software is prone to misoperation, reducing the safety and stability during the use of the atomizing device.

[0034] Based on this, the embodiments of the present application provide a short-circuit protection circuit and an atomizing device, which are described in detail as follows. First, the short-circuit protection circuit in the embodiments of the present application is described.

[0035] Please refer to Figure 1 , the short-circuit protection circuit provided by the embodiments of the present application includes:

[0036] A control module 100, the control module 100 includes a first pin, a second pin and a third pin. The first pin is electrically connected to the power input terminal. The control module 100 further includes a comparator 110. The first input terminal of the comparator 110 is electrically connected to the first pin, and the second input terminal of the comparator 110 is electrically connected to the second pin;

[0037] A heating module 200, the first end of the heating module 200 is electrically connected to the second pin, and the second end of the heating module 200 is grounded;

[0038] A switch module 300, the first end of the switch module 300 is electrically connected to the power input terminal, the second end of the switch module 300 is electrically connected to the first end of the heating module 200, and the third end of the switch module 300 is electrically connected to the third pin;

[0039] Wherein, when the control module 100 outputs a high-level signal to the switch module 300 through the third pin, the switch module 300 is turned on to enable the heating module 200 to work; when the comparator 110 receives a low-level signal from the heating module 200 through the second pin, the control module 100 outputs a low-level signal to the switch module 300 through the third pin to make the switch module 300 cut off.

[0040] It can be understood that the first pin of the control module 100 and the power input terminal can be directly connected, or there can be other electronic components connected between the first pin and the power input terminal, such as resistors, capacitors, diodes, voltage regulators, etc., which are used to achieve functions such as voltage regulation, filtering, and protection. The power input terminal is the power source of the short-circuit protection circuit and provides the required electrical energy for the entire circuit.

[0041] Exemplarily, the first input terminal of the comparator 110 is electrically connected to the first pin, which is used to obtain the voltage of the power input terminal, and a stable reference voltage can be formed through other electronic components between the first input terminal and the first pin of the comparator 110, and this reference voltage will be used as a voltage for comparison in the comparator 110. The operation of the entire short-circuit protection circuit depends on the stable power supply provided by the power input terminal. If the power supply voltage changes, it will affect the reference benchmark of the comparator 110, thereby affecting the short-circuit protection of the heating module.

[0042] Exemplarily, the heating module 200 can be a heating wire. The heating wire material can be nickel-chromium alloy, iron-chromium-aluminum alloy, etc. The heating wire can be in different forms such as spiral, mesh, or strip to optimize the heat dissipation effect. Or, the heating wire can be embedded in insulating materials such as ceramics and quartz to form a heating tube or a heating assembly. When current passes through the heating module 200, the Joule heating effect will occur, causing the heating module 200 to heat up.

[0043] It can be understood that the second input terminal of the comparator 110 is electrically connected to the second pin, and the second pin is electrically connected to the first end of the heating module 200, which is used to monitor the voltage of the heating module 200. The control module 100 can judge the temperature change of the heating module 200 by monitoring the voltage comparison result of the comparator. When the control module 100 outputs a high-level signal to the switch module 300 through the third pin, the switch module 300 conducts, allowing current to flow to the heating module 200, making it work and generate heat. If the heating module 200 has a short circuit or other faults, resulting in a decrease in its voltage, this change will be transmitted to the comparator 110 through the second pin. After the comparator 110 detects the voltage decrease by comparing the voltages of the first input terminal and the second input terminal, the control module 100 will output a low-level signal to the switch module 300 through the third pin. When the switch module 300 receives the low-level signal, it will cut off, cutting off the current flowing to the heating module 200, thereby preventing damage caused by the short circuit.

[0044] The short - circuit protection circuit provided by the embodiment of the present application includes a control module 100, a heating module 200, and a switching module 300. The control module 100 includes a first pin, a second pin, and a third pin. Inside the control module 100, there is a comparator 110. The first input terminal of the comparator 110 is electrically connected to the first pin, and the second input terminal of the comparator 110 is electrically connected to the second pin. The electrical connection between the first input terminal of the comparator 110 and the first pin forms an internal reference voltage. The second input terminal of the comparator 110 is electrically connected to the second pin, and the second pin is electrically connected to the first end of the heating module 200, so that the second input terminal of the comparator 110 monitors the voltage of the heating module 200. The control module 100 outputs a high - level signal to the switching module 300 through the third pin. The switching module 300 conducts to enable the heating module 200 to work. By comparing the voltages of the first input terminal and the second input terminal of the comparator 110, it can be determined whether the voltage of the heating module 200 decreases due to being short - circuited or the resistance value decreasing. The comparator 110 monitors the voltage state of the heating module 200 in real - time and will detect this change. When the heating module 200 is short - circuited or the resistance value decreases, the control module 100 can output a low - level signal to the switching module 300 through the third pin, so that the switching module 300 is cut off, and the heating module 200 is disconnected from the circuit to prevent overheating, which can improve the safety and stability during the use of the atomization device.

[0045] Please refer to Figure 2 In some embodiments, the short - circuit protection circuit further includes a first resistor R1. Inside the control module 100, there are also a first selector 120 and a first register 130. The input terminal of the first selector 120 is electrically connected to the second pin, the output terminal of the first selector 120 is electrically connected to the second input terminal of the comparator 110. The first end of the heating module 200 is electrically connected to the first end of the first resistor R1, the second end of the first resistor R1 is electrically connected to the second pin, and the first register 130 is electrically connected to the input terminal of the first selector 120.

[0046] It can be understood that the first selector 120 is a multiplexer. It can select one of multiple input signals and output it. The first selector 120 has only one output terminal, which is connected to the second input terminal of the comparator 110, and can selectively output one of the multiple input signals to the comparator 110 for comparison. The input terminal of the first selector 120 is electrically connected to the second pin to detect the voltage at the first end of the heating module 200, forming an input voltage of the first selector 120.

[0047] Exemplarily, the first register 130 is a register that can be used to select the operating mode or function of the circuit, such as selecting different input sources, output channels, operation modes, etc. For example, by setting the data of the first 3 bits or any number of bits of the register, the first selector 120 is controlled to select one of multiple input signals and output it. The first register 130 provides a control signal for configuring the input selection of the first selector 120.

[0048] It can be understood that the first end of the heating module 200 is electrically connected to the first end of the first resistor R1, and the second end of the first resistor R1 is connected to the second pin of the control module 100. The first resistor R1 constitutes a circuit for measuring the voltage at the first end of the heating module 200.

[0049] Please refer to Figure 3 , the control module 100 further includes a second selector 140, a first flip-flop 150, a clock signal unit 160, and an exclusive OR gate unit 170. The output end of the comparator 110 is electrically connected to the first input end of the first flip-flop 150 and the first input end of the second selector 140. The second input end of the first flip-flop 150 is electrically connected to the clock signal unit 160. The output end of the first flip-flop 150 is electrically connected to the second input end of the second selector 140. The third input end of the second selector 140 is electrically connected to the first register 130. The output end of the second selector 140 is electrically connected to the first input end of the exclusive OR gate unit 170. The second input end of the exclusive OR gate unit 170 is electrically connected to the first register 130. The output end of the exclusive OR gate unit 170 is electrically connected to the switch module 300.

[0050] It can be understood that the first input end of the second selector 140 is electrically connected to the output end of the comparator 110. The second selector 140 is a selector with multiple inputs. According to the control signal, it selects one of the multiple inputs as the output of the selector. The second selector 140 provides additional flexibility and can select different signal paths according to different control conditions.

[0051] Exemplarily, the first flip-flop 150 is a storage unit used to temporarily store the output signal of the comparator 110. Its first input end is connected to the output of the comparator 110, and the second input end is connected to the clock signal unit 160. When receiving the clock signal from the clock signal unit 160, the first flip-flop 150 captures and saves the output state of the comparator, and inputs it as the signal at the second input end of the second selector 140. The second selector 140 can select the signal directly output by the comparator 110 as the output, or select the signal obtained by sampling and holding the output result of the comparator 110 by the first flip-flop 150 as the output. The first register 130 controls the output signal of the second selector 140.

[0052] Exemplarily, the first flip-flop 150 can be a D flip-flop, which is used to store one-bit binary data and update its output state under the trigger of a clock signal. The output of the D flip-flop will be updated at the rising edge or falling edge of the clock signal (depending on the specific type of the flip-flop). Using a D flip-flop can improve the response speed and stability of the short-circuit protection circuit, ensuring that the signal at the output end of the comparator 110 is accurately captured and the signal at the second input end of the second selector 140 is updated within a specific clock cycle.

[0053] It can be understood that the clock signal unit 160 is a part of an electronic device or system that provides a clock signal, providing a periodic electrical signal to control synchronous operations in digital circuits, such as data transmission, flip-flop state update, etc. The clock signal unit 160 is responsible for generating clock pulses and sending them to the first flip-flop 150 to sample the output signal of the comparator 110 to the second selector 140 at regular intervals.

[0054] Exemplarily, the exclusive-OR gate unit 170 is used to invert or directly output the signal output by the second selector 140, which is controlled by the first register 130. The exclusive-OR gate unit 170 receives two input signals and outputs a high level when the two input signals are different (i.e., one is at a high level and the other is at a low level), and outputs a low level if the two input signals are the same. Among them, one of the input signals is the signal of the first register 130, and the other is the signal output by the second selector 140. By controlling the signal of the first register 130 input to the exclusive-OR gate unit 170, it can be selected whether to invert the output.

[0055] It can be understood that the output end of the exclusive-OR gate unit 170 is connected to the switch module 300, which is used to control the conduction or cut-off of the switch module 300 according to the result of voltage comparison, and further control the connection or disconnection of the heating module 200 from the circuit to avoid overheating output of the heating module 200.

[0056] Please refer to Figure 4 , in some embodiments, the switch module 300 includes a first switching transistor Q1 and a second resistor R2. The first pole of the first switching transistor Q1 is electrically connected to the power input terminal, the second pole of the first switching transistor Q1 is electrically connected to the third pin, the third pole of the first switching transistor Q1 is electrically connected to the first end of the heating module 200, the first end of the second resistor R2 is electrically connected to the second pole of the first switching transistor Q1, and the second end of the second resistor R2 is electrically connected to the first pole of the first switching transistor Q1.

[0057] Exemplarily, the first switching transistor Q1 can be a PMOS transistor. The first pole of the first switching transistor Q1 is the source, the third pole is the drain, and the second pole is the gate. The first pole of the first switching transistor Q1, which is the source, is electrically connected to the power input terminal, the gate is electrically connected to the third pin, and the drain is electrically connected to the first end of the heating module 200.

[0058] Please refer to Figure 5 Figure 5 , in some embodiments, the control module 100 further includes a series resistance unit, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a third selector 180, and a second register 190. The first end of the third resistor R3 is electrically connected to the power input terminal. The first end of the fourth resistor R4 is electrically connected to the second end of the third resistor R3. The second end of the fourth resistor R4 is electrically connected to the second register 190. The first end of the series resistance unit is electrically connected to the second end of the third resistor R3 or the second end of the fourth resistor R4. The first end of the fifth resistor R5 is electrically connected to the second register 190. The second end of the fifth resistor R5 is grounded. The second end of the series resistance unit is electrically connected to the first end of the fifth resistor R5 or grounded. The second register 190 is electrically connected to the first input terminal of the third selector 180. The second and third input terminals of the third selector 180 are electrically connected to the series resistance unit. The output terminal of the third selector 180 is electrically connected to the first input terminal of the comparator 110.

[0059] It can be understood that the second register 190 is used to control the connection of the first end of the series resistance unit to the second end of the fourth resistor R4 or the third resistor R3, and is used to control the grounding of the second end of the series resistance unit or its electrical connection to the first end of the fifth resistor R5. The third selector 180 is used to control the connection with the series resistance unit. According to different connection situations, different reference comparison voltages can be formed.

[0060] In some embodiments, the series resistance unit includes at least two resistors connected in series. The second input terminal of the third selector 180 is electrically connected to the first end of the series resistance unit. The third input terminal of the third selector 180 is electrically connected to one end of any one of the at least two resistors connected in series.

[0061] Exemplarily, the third input terminal of the third selector 180 is electrically connected to one end of any one of the at least two resistors connected in series, which can control the resistance value of the series resistance unit connected to the circuit. For example, when the voltage provided by the power input terminal is VDD, the series resistance unit includes 16 resistors with a resistance value of r connected in series, and the resistance values of the third resistor R3, the fourth resistor R4, and the fifth resistor R5 are all 8r, various different reference comparison voltages can be formed according to the connection selection situation of the first and second ends of the series resistance unit.

[0062] Exemplarily, when the first end of the series resistance unit is electrically connected to the second end of the third resistor R3 and the second end of the series resistance unit is electrically connected to the first end of the fifth resistor R5. According to the 16 resistors with a resistance value of r connected in series in the series resistance unit, the voltage level can be divided into 16 parts, specifically selected by the third selector to control the number of resistors actually connected to the circuit. For example, the reference voltage is Among them, the range of n is from 0 to 15, representing the number of resistors connected.

[0063] Exemplarily, when the first end of the series resistor unit is electrically connected to the second end of the third resistor R3 and the second end of the series resistor unit is grounded. According to the 16 resistors with a resistance value of r connected in series in the series resistor unit, the voltage level can be divided into 16 parts, which are specifically selected by the third selector to control the number of resistors actually connected to the circuit. For example, the reference voltage is Among them, the range of n is from 0 to 15, representing the number of resistors connected.

[0064] Exemplarily, when the first end of the series resistor unit is electrically connected to the second end of the fourth resistor R4 and the second end of the series resistor unit is electrically connected to the first end of the fifth resistor R5. According to the 16 resistors with a resistance value of r connected in series in the series resistor unit, the voltage level can be divided into 16 parts, which are specifically selected by the third selector to control the number of resistors actually connected to the circuit. For example, the reference voltage is Among them, the range of n is from 0 to 15, representing the number of resistors connected.

[0065] Exemplarily, when the first end of the series resistor unit is electrically connected to the second end of the fourth resistor R4 and the second end of the series resistor unit is grounded. According to the 16 resistors with a resistance value of r connected in series in the series resistor unit, the voltage level can be divided into 16 parts, which are specifically selected by the third selector to control the number of resistors actually connected to the circuit. For example, the reference voltage is Among them, the range of n is from 0 to 15, representing the number of resistors connected.

[0066] Please refer to Figure 6 , in some embodiments, the circuit further includes a first switch K1, a light-emitting diode D1, and a sixth resistor R6. The control module further includes a fourth pin. The first end of the sixth resistor R6 is electrically connected to the fourth pin, the second end of the sixth resistor R6 is electrically connected to the negative electrode of the light-emitting diode D1, the positive electrode of the light-emitting diode D1 is electrically connected to the power input terminal, the first end of the first switch K1 is grounded, and the second end of the first switch K1 is electrically connected to the negative electrode of the light-emitting diode D1.

[0067] It can be understood that when the first switch K1 is closed, the negative electrode of the light-emitting diode D1 is grounded, the positive electrode of the light-emitting diode D1 is connected to the power input terminal, and the light-emitting diode D1 will light up. The light-emitting diode D1 can be used as a status indicator.

[0068] Please refer to Figure 7, in some embodiments, the circuit further includes a microphone module 400, and the control module 100 further includes a fifth pin and a sixth pin. The first end of the microphone module 400 is electrically connected to the fifth pin, the second end of the microphone module 400 is grounded, and the sixth pin is grounded.

[0069] It can be understood that the microphone module 400 is used to sense the user's inhalation action, thereby triggering the working process of the atomization device. The microphone module 400 can adopt an airflow induction switch, which is composed of multiple components, including pole pieces, diaphragms, gaskets, cavities, shells, PCB components, and LEDs, etc. The microphone module 400 involves capacitance changes. When the user inhales or exhales, the conductive film deforms due to the airflow, resulting in a change in the distance between the pole plates, and thus causing a change in capacitance. This change is recognized and processed inside the control module 100 and then outputs an electrical signal to trigger the circuit to work.

[0070] Please refer to Figure 8 , in some embodiments, the circuit further includes a seventh resistor R7 and a first capacitor C1. The first end of the seventh resistor R7 is electrically connected to the first pin, the second end of the seventh resistor R7 is electrically connected to the power input terminal, the first end of the first capacitor C1 is electrically connected to the first end of the seventh resistor R7, and the second end of the first capacitor C1 is grounded.

[0071] It can be understood that the first end of the seventh resistor R7 is electrically connected to the first pin, the second end of the seventh resistor R7 is electrically connected to the power input terminal, the first end of the first capacitor C1 is electrically connected to the first end of the seventh resistor R7, and the second end of the first capacitor C1 is grounded. The seventh resistor R7 and the first capacitor C1 are used to stabilize the voltage at the power input terminal and filter out noise. The capacitor C1 can be used to smooth the voltage fluctuation and input a stable voltage to the first pin.

[0072] Please refer to Figure 9 , the atomization device provided by the embodiment of the present application includes the above short-circuit protection circuit. The specific implementation manner of the atomization device is basically the same as that of the specific embodiment of the above short-circuit protection circuit, and will not be elaborated here. It can be understood that the atomization device can be applied in multiple fields such as medical treatment and electronic cigarettes. In an electronic cigarette, the atomization device heats and converts a liquid containing nicotine into inhalable mist for the user to inhale. On the premise of meeting the requirements of the embodiment of the present application, other functional modules can also be set in the atomization device.

[0073] The above has described the embodiments of the present invention in detail with reference to the drawings, but the present invention is not limited to the above embodiments. Various changes can be made without departing from the spirit of the present invention within the knowledge scope of those of ordinary skill in the art. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims

1. A short circuit protection circuit, characterized in that: include: A control module, the control module comprising a first pin, a second pin and a third pin, the first pin being electrically connected to a power input terminal, the control module further comprising a comparator, the first input terminal of the comparator being electrically connected to the first pin, and the second input terminal of the comparator being electrically connected to the second pin; A heating module, wherein a first end of the heating module is electrically connected to the second pin, and a second end of the heating module is grounded; A switch module, wherein a first end of the switch module is electrically connected to the power input end, a second end of the switch module is electrically connected to the first end of the heating module, and a third end of the switch module is electrically connected to the third pin; Among them, when the control module outputs a high-level signal to the switch module through the third pin, the switch module is turned on to make the heating module work; when the comparator receives a low-level signal from the heating module through the second pin, the control module outputs a low-level signal to the switch module through the third pin to turn off the switch module.

2. The short circuit protection circuit according to claim 1, characterized in that: The short-circuit protection circuit also includes a first resistor, and the control module also includes a first selector and a first register, the input end of the first selector is electrically connected to the second pin, the output end of the first selector is electrically connected to the second input end of the comparator, the first end of the heating module is electrically connected to the first end of the first resistor, the second end of the first resistor is electrically connected to the second pin, and the first register is electrically connected to the input end of the first selector.

3. The short circuit protection circuit according to claim 2, characterized in that: The control module also includes a second selector, a first trigger, a clock signal unit and an XOR gate unit. The output end of the comparator is electrically connected to the first input end of the first trigger and the first input end of the second selector, the second input end of the first trigger is electrically connected to the clock signal unit, the output end of the first trigger is electrically connected to the second input end of the second selector, the third input end of the second selector is electrically connected to the first register, the output end of the second selector is electrically connected to the first input end of the XOR gate unit, the second input end of the XOR gate unit is electrically connected to the first register, and the output end of the XOR gate unit is electrically connected to the switch module.

4. The short circuit protection circuit according to claim 1, characterized in that: The switch module includes a first switch tube and a second resistor, the first pole of the first switch tube is electrically connected to the power input end, the second pole of the first switch tube is electrically connected to the third pin, the third pole of the first switch tube is electrically connected to the first end of the heating module, the first end of the second resistor is electrically connected to the second pole of the first switch tube, and the second end of the second resistor is electrically connected to the first pole of the first switch tube.

5. The short circuit protection circuit according to claim 1, characterized in that: The control module further includes a series resistor unit, a third resistor, a fourth resistor, a fifth resistor, a third selector and a second register, wherein a first end of the third resistor is electrically connected to the power input terminal, a first end of the fourth resistor is electrically connected to a second end of the third resistor, a second end of the fourth resistor is electrically connected to the second register, and a first end of the series resistor unit is electrically connected to a second end of the third resistor or a second end of the fourth resistor; The first end of the fifth resistor is electrically connected to the second register, the second end of the fifth resistor is grounded, the second end of the series resistance unit is electrically connected to or grounded to the first end of the fifth resistor, the second register is electrically connected to the first input end of the third selector, the second input end and the third input end of the third selector are electrically connected to the series resistance unit, and the output end of the third selector is electrically connected to the first input end of the comparator.

6. The short circuit protection circuit according to claim 5, characterized in that: The series resistor unit includes at least two resistors connected in series, the second input end of the third selector is electrically connected to the first end of the series resistor unit, and the third input end of the third selector is electrically connected to one end of any one of the at least two resistors connected in series.

7. The short circuit protection circuit according to claim 1, characterized in that: The circuit also includes a first switch, a light emitting diode and a sixth resistor. The control module also includes a fourth pin. The first end of the sixth resistor is electrically connected to the fourth pin, the second end of the sixth resistor is electrically connected to the cathode of the light emitting diode, the anode of the light emitting diode is electrically connected to the power input terminal, the first end of the first switch is grounded, and the second end of the first switch is electrically connected to the cathode of the light emitting diode.

8. The short circuit protection circuit according to claim 1, characterized in that: The circuit also includes a microphone module, and the control module also includes a fifth pin and a sixth pin. The first end of the microphone module is electrically connected to the fifth pin, the second end of the microphone module is grounded, and the sixth pin is grounded.

9. The short circuit protection circuit according to claim 1, characterized in that: The circuit also includes a seventh resistor and a first capacitor, the first end of the seventh resistor is electrically connected to the first pin, the second end of the seventh resistor is electrically connected to the power input terminal, the first end of the first capacitor is electrically connected to the first end of the seventh resistor, and the second end of the first capacitor is grounded.

10. An atomization device, characterized in that: A short-circuit protection circuit comprising any one of claims 1 to 9.

Images