Heating circuit and atomization device

Abstract

The utility model provides a heating circuit and an atomization device, and relates to the technical field of electronic atomization, the heating circuit comprises a controller, a switch module and a heating resistor, and the controller sends a first control signal to the switch module based on an airflow detection signal sent by an airflow sensor, the heating resistor is arranged in the first preset area where the airflow sensor is located, so that after a user uses the atomization device, air in the first preset area is heated through the heating resistor, and then the atomization device is heated through the heating resistor. And condensate dripping or flowing onto the airflow sensor is indirectly heated, evaporated and eliminated through hot air, so that the possibility that detection of the airflow sensor is interfered is reduced.

Description

A heating circuit and an atomizing device Technical Field

[0001] This application belongs to the field of electronic atomization technology, specifically relating to a heating circuit and an atomizing device. Background Technology

[0002] In related technologies, atomizing devices use airflow sensors to detect suction actions. However, after a user uses the atomizing device, the residual atomizing matrix in the airflow channel will cool and form condensate due to temperature changes. If the condensate drips down the airflow channel or flows onto the airflow sensor, it will interfere with the detection of the airflow sensor, such as incorrectly identifying the suction action after the user stops suctioning. Summary of the Invention

[0003] This application aims to provide a heating circuit and an atomizing device, which at least solves the problem in the related art that after the user uses the atomizing device, the atomizing matrix remaining in the airflow channel will cool down and form condensate, which drips down the airflow channel or flows onto the airflow sensor, causing interference to the detection of the airflow sensor.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows:

[0005] This application provides a heating circuit including a controller, a switching module, and a heating resistor; the controller is electrically connected to the switching module, and the controller is used to be electrically connected to the airflow sensor of the atomizing device, and to send a first control signal to the switching module (20) based on the airflow detection signal sent by the airflow sensor (40); the switching module is disposed in the circuit between the heating resistor and the power supply, and the switching module is used to turn on when the first control signal is obtained, so that the heating resistor is energized and heated; the heating resistor is disposed in a first preset area where the airflow sensor is located.

[0006] In some embodiments, the switching module includes a first resistor, a second resistor, and a first switching device; a first end of the first resistor is electrically connected to the power supply, and a second end of the first resistor is electrically connected to a second end of the second resistor and a control terminal of the first switching device; a first end of the second resistor is electrically connected to a first terminal of the controller, and a second end of the second resistor is electrically connected to the control terminal of the first switching device; a first end of the first switching device is electrically connected to the power supply, and a second end of the first switching device is electrically connected to a first end of the heating resistor; the second end of the heating resistor is grounded.

[0007] In some embodiments, the first switching device may be a PMOS transistor or a PNP transistor.

[0008] In some embodiments, the switching module includes a third resistor, a fourth resistor, and a second switching device; a first end of the third resistor is electrically connected to a first end of the controller, and a second end of the third resistor is electrically connected to both the first end of the fourth resistor and the control end of the second switching device; a first end of the fourth resistor is electrically connected to the control end of the second switching device, and a second end of the fourth resistor is grounded; a first end of the second switching device is electrically connected to a second end of the heating resistor, and a second end of the second switching device is grounded; a first end of the heating resistor is electrically connected to the power supply.

[0009] In some embodiments, the type of the second switching device includes an NMOS transistor and an NPN transistor.

[0010] In some embodiments, the heating circuit further includes a temperature detection module; the temperature detection module is disposed in a second preset area where the heating resistor is located, the temperature detection module is electrically connected to the controller, the temperature detection module is used to be electrically connected to the power supply, and to collect the temperature of the heating resistor, and to generate a voltage signal based on the temperature of the heating resistor; the controller is also used to send a second control signal to the switching module when the voltage signal is abnormal; the switching module is also used to disconnect when the second control signal is received, so that the heating resistor is de-energized and stops heating.

[0011] In some embodiments, the temperature detection module includes a fifth resistor and a thermistor; the first end of the fifth resistor is electrically connected to the power supply, and the second end of the fifth resistor is electrically connected to the first end of the thermistor and the second end of the controller, respectively; the first end of the thermistor is electrically connected to the second end of the controller, and the second end of the thermistor is grounded.

[0012] In some embodiments, the temperature detection module further includes a first capacitor; a first terminal of the first capacitor is electrically connected to a second terminal of the fifth resistor and a second terminal of the controller, respectively, and a second terminal of the first capacitor is grounded.

[0013] In some embodiments, the airflow sensor may be a silicon microphone sensor.

[0014] This application embodiment also provides an atomizing device, including a heating circuit and an airflow sensor as described above. The airflow sensor and the heating resistor in the heating circuit are located in the airflow channel of the atomizing device and are both located in the first preset area.

[0015] In this embodiment, the controller sends a first control signal to the switch module based on the airflow detection signal sent by the airflow sensor. The switch module then turns on upon receiving the first control signal, energizing the heating resistor. Since the heating resistor is located within the first preset area where the airflow sensor is located, the air within the first preset area is heated by the heating resistor after the user uses the atomizing device. The hot air indirectly heats and evaporates the condensate that drips or flows onto the airflow sensor, thereby reducing the possibility of interference with the airflow sensor's detection. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application 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.

[0017] Figure 1 is a schematic diagram of a heating circuit provided in an embodiment of this application;

[0018] Figure 2 is a schematic diagram of a heating circuit provided in an embodiment of this application;

[0019] Figure 3 is a detailed schematic diagram of another heating circuit provided in an embodiment of this application;

[0020] Figure 4 is a schematic diagram of a temperature detection module provided in an embodiment of this application;

[0021] Figure 5 is a schematic diagram of an airflow sensor provided in an embodiment of this application;

[0022] Figure 6 is a flowchart of a heating method provided in an embodiment of this application;

[0023] Figure 7 is a flowchart of another heating method provided in an embodiment of this application;

[0024] Figure 8 is a schematic diagram of an atomizing device provided in an embodiment of this application.

[0025] Figure label:

[0026] 10-Controller; 20-Switch Module; 30-Heating Resistor; 40-Airflow Sensor; 401-Output Terminal of Airflow Sensor; 402-Power Terminal of Airflow Sensor; 403-Ground Terminal of Airflow Sensor; 50-Power Supply; 60-Temperature Detection Module; A1-First Preset Area; A2-Second Preset Area; Q1-First Switching Device; Q2-Second Switching Device; R1-First Resistor; R2-Second Resistor; R3-Third Resistor; R4-Fourth Resistor; R5-Fifth Resistor; R6-Sixth Resistor; Rt-Thermistor; C1-First Capacitor; C2-Second Capacitor; 300-Atomizing Device; 200-Heating Circuit. Detailed Implementation

[0027] 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 some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0029] Referring to Figure 1, this embodiment of the application provides a heating circuit, including a controller 10, a switch module 20, and a heating resistor 30. The controller 10 is electrically connected to the switch module 20. The controller 10 is used to be electrically connected to the airflow sensor 40 of the atomizing device and to send a first control signal to the switch module 20 based on the airflow detection signal sent by the airflow sensor 40. The switch module 20 is disposed in the circuit between the heating resistor 30 and the power supply 50. The switch module 20 is used to turn on when the first control signal is received, so that the heating resistor 30 is energized and heated. The heating resistor 30 is disposed in the first preset area A1 where the airflow sensor 40 is located.

[0030] In some embodiments, the first preset region A1 is the confined space region where the airflow sensor 40 is located. For example, the first preset region A1 is the cubic space region where the airflow sensor 40 is located. The heating resistor 30 is disposed within the first preset region A1 where the airflow sensor 40 is located. The heat generated by the energized heating resistor 30 can be conducted to the air in the region where the airflow sensor 40 is located, indirectly heating and evaporating any condensate dripping or flowing onto the airflow sensor, thereby reducing the possibility of interference with the airflow sensor's detection. It is understood that the airflow sensor 40 and the heating resistor 30 are both located in the first preset region A1. The heat generated by the heating resistor 30 is transferred through the air surrounding the airflow sensor 40 to the condensate on the surface of the airflow sensor 40, thereby causing the condensate to evaporate.

[0031] In some embodiments, the controller 10 may be a microcontroller unit (MCU) or other types of chips.

[0032] In some embodiments, the resistance value of the heating resistor 30 ranges from 0.5 ohms to 5 ohms.

[0033] In some embodiments, the heating resistor 30 is a surface mount resistor. By placing the heating resistor 30 in the first preset area A1 where the airflow sensor 40 is located, that is, placing the heating resistor 30 next to the airflow sensor 40, the heat emitted by the heating resistor 30 when energized can be quickly transferred to the airflow sensor 40, thereby rapidly raising the temperature of the airflow sensor 40.

[0034] In some embodiments, the airflow detection signal is a high-level signal.

[0035] In some embodiments, the third terminal of the controller 10 is electrically connected to the output terminal 401 of the airflow sensor 40. The controller 10 is also used to send a second control signal to the switch module 20 when the output terminal 401 of the airflow sensor 40 outputs a low-level signal, indicating that the airflow sensor 40 has not detected the suction action. The switch module 20 disconnects upon receiving the second control signal, thereby de-energizing the heating resistor 30 and stopping the heating.

[0036] In some embodiments, the first control signal is a pulse width modulation (PWM) signal.

[0037] In some embodiments, the level of the first control signal is opposite to the level of the second control signal; when the level of the first control signal is low, the level of the second control signal is high; when the level of the first control signal is high, the level of the second control signal is low.

[0038] In some embodiments, the power supply 50 is electrically connected to the first end of the switch module 20, the second end of the switch module 20 is electrically connected to the first end of the heating resistor 30, and the second end of the heating resistor 30 is grounded; in other embodiments, the power supply 50 is electrically connected to the first end of the heating resistor 30, the second end of the heating resistor 30 is electrically connected to the first end of the switch module 20, and the second end of the switch module 20 is grounded.

[0039] In some embodiments, the controller 10 is specifically configured to, upon receiving an airflow detection signal sent by the airflow sensor 40, obtain the duration of the airflow detection signal and the cumulative number of times the airflow detection signal is acquired, and send a first control signal to the switch module 20 if the duration exceeds a preset duration threshold or the cumulative number of acquisitions exceeds a preset number threshold.

[0040] In some embodiments, the preset duration threshold can be set according to the actual situation, for example, the preset duration threshold is 3 seconds; the preset number threshold can be set according to the actual situation, for example, the preset number threshold is 3 times.

[0041] In this embodiment, if the duration of the airflow detection signal is longer than a preset duration threshold, it indicates that too much condensate remains on the airflow sensor 40, affecting the airflow sensor 40's recognition of the suction action. If the cumulative number of airflow detection signal acquisitions is equal to the number of times the user suctions, and the cumulative number of airflow detection signal acquisitions is greater than a preset number threshold, it indicates that the user suctions too many times, resulting in too much condensate remaining on the airflow sensor 40, affecting the airflow sensor 40's recognition of the suction action. Therefore, the controller 10 sends a first control signal to the switch module 20. Upon receiving the first control signal, the switch module 20 is turned on, causing the heating resistor 30 to be energized and heated. The temperature of the airflow sensor 40 rises, evaporating and eliminating the condensate already accumulated on the airflow sensor 40, while preventing the formation of new condensate on the airflow sensor 40. This reduces the possibility that the airflow sensor 40 may incorrectly recognize the suction action after suction stops.

[0042] In some embodiments, the controller 10 is further configured to send a second control signal to the switch module 20 after a preset time period following the sending of the first control signal to the switch module 20, thereby causing the switch module 20 to disconnect and the heating resistor 30 to be de-energized and stop heating.

[0043] In some embodiments, the preset duration ranges from 2 seconds to 20 seconds, and can be set according to actual conditions.

[0044] In this embodiment, the controller 10 sends a first control signal to the switch module 20 to turn on the switch module 20, energizing the heating resistor 30. Then, after a preset time, the controller 10 sends a second control signal to the switch module 20 to turn off the switch module 20, de-energizing the heating resistor 30 and stopping its heating. This controls the heating duration of the heating resistor 30, ensuring that it reaches the temperature required to eliminate condensate on the airflow sensor 40. This saves energy while ensuring the elimination of accumulated condensate on the airflow sensor 40, and also prevents the heating resistor 30 from overheating and being damaged.

[0045] In some embodiments, the atomizing device includes an atomizing component and a power supply component. The power supply component provides electrical energy to the atomizing component, which heats the atomizing matrix into an aerosol. The atomizing device can be a disposable product or a refillable product. For disposable atomizing devices, the atomizing component and the power supply component are fixedly connected; for refillable atomizing devices, the atomizing component and the power supply component are detachably connected, and the atomizing component and the power supply component can be replaced as needed.

[0046] In this embodiment, the controller 10 sends a first control signal to the switch module 20 based on the airflow detection signal sent by the airflow sensor 40. The switch module 20 then turns on upon receiving the first control signal, causing the heating resistor 30 to be energized and heated. Since the heating resistor 30 is located within the first preset area A1 where the airflow sensor 40 is located, the temperature of the airflow sensor 40 can be increased by heating it through the heating resistor 30 after the airflow sensor 40 sends the airflow detection signal, i.e., after the user uses the atomizing device. This causes the condensate dripping or flowing onto the airflow sensor 40 to evaporate and be eliminated, thereby reducing the possibility of interference with the detection of the airflow sensor 40.

[0047] Referring to Figure 2, in some embodiments, the switch module 20 includes a first resistor R1, a second resistor R2, and a first switch device Q1; the first end of the first resistor R1 is electrically connected to the power supply 50, and the second end of the first resistor R1 is electrically connected to the second end of the second resistor R2 and the control terminal of the first switch device Q1; the first end of the second resistor R2 is electrically connected to the first terminal of the controller 10, and the second end of the second resistor R2 is electrically connected to the control terminal of the first switch device Q1; the first end of the first switch device Q1 is electrically connected to the power supply 50, and the second end of the first switch device Q1 is electrically connected to the first end of the heating resistor 30; the second end of the heating resistor 30 is grounded.

[0048] In this embodiment, the first resistor R1 and the second resistor R2 are both voltage divider resistors. When the controller 10 receives the airflow detection signal sent by the airflow sensor 40, it sends a first control signal to the first switching device Q1. Then, the first switching device Q1 is turned on when it receives the first control signal, so that the heating resistor 30 is energized and heated.

[0049] In some embodiments, the first switching device Q1 may be a PMOS transistor or a PNP transistor.

[0050] In some embodiments, the first switching device Q1 may also be other types of switching devices, which are not limited here.

[0051] PMOS stands for positive channel metal-oxide-semiconductor. A PNP transistor consists of three semiconductors: one N-type (electron-type) semiconductor and two P-type (hole-type) semiconductors, with the N-type semiconductor in the middle and the two P-type semiconductors on either side.

[0052] In some embodiments, the first switching device Q1 is a PMOS transistor; the first end of the first resistor R1 is electrically connected to the power supply 50; the second end of the first resistor R1 is electrically connected to the second end of the second resistor R2 and the gate of the first switching device Q1; the first end of the second resistor R2 is electrically connected to the first end of the controller 10; the second end of the second resistor R2 is electrically connected to the gate of the first switching device Q1; the source of the first switching device Q1 is electrically connected to the power supply 50; the drain of the first switching device Q1 is electrically connected to the first end of the heating resistor 30; and the second end of the heating resistor 30 is grounded.

[0053] In some embodiments, the first switching device Q1 is a PNP transistor; the first end of the first resistor R1 is electrically connected to the power supply 50; the second end of the first resistor R1 is electrically connected to the second end of the second resistor R2 and the base of the first switching device Q1; the first end of the second resistor R2 is electrically connected to the first end of the controller 10; the second end of the second resistor R2 is electrically connected to the base of the first switching device Q1; the emitter of the first switching device Q1 is electrically connected to the power supply 50; the collector of the first switching device Q1 is electrically connected to the first end of the heating resistor 30; and the second end of the heating resistor 30 is grounded.

[0054] In this embodiment, the first control signal is low level. When the controller 10 receives the airflow detection signal sent by the airflow sensor 40, it sends the first control signal to the first switching device Q1. Then, the first switching device Q1 is turned on when it receives the first control signal, so that the heating resistor 30 is energized and heated.

[0055] Referring to Figure 3, in some embodiments, the switch module 20 includes a third resistor R3, a fourth resistor R4, and a second switch device Q2; the first end of the third resistor R3 is electrically connected to the first end of the controller 10, and the second end of the third resistor R3 is electrically connected to the first end of the fourth resistor R4 and the control end of the second switch device Q2; the first end of the fourth resistor R4 is electrically connected to the control end of the second switch device Q2, and the second end of the fourth resistor R4 is grounded; the first end of the second switch device Q2 is electrically connected to the second end of the heating resistor 30, and the second end of the second switch device Q2 is grounded; the first end of the heating resistor 30 is electrically connected to the power supply 50.

[0056] In this embodiment, the third resistor R3 and the fourth resistor R4 are both voltage divider resistors. When the controller 10 receives the airflow detection signal sent by the airflow sensor 40, it sends a first control signal to the second switching device Q2. Then, when the second switching device Q2 receives the first control signal, it turns on, so that the heating resistor 30 is energized and heated.

[0057] In some embodiments, the second switching device Q2 may be an NMOS transistor or an NPN transistor.

[0058] In some embodiments, the second switching device Q2 may also be other types of switching devices, which are not limited here.

[0059] NMOS transistors are negative channel metal-oxide-semiconductor transistors; NPN transistors consist of three semiconductors, including two N-type semiconductors and one P-type semiconductor, with the P-type semiconductor in the middle and the two N-type semiconductors on both sides.

[0060] In some embodiments, the second switching device Q2 is an NMOS transistor; the first end of the third resistor R3 is electrically connected to the first end of the controller 10; the second end of the third resistor R3 is electrically connected to the first end of the fourth resistor R4 and the gate of the second switching device Q2; the first end of the fourth resistor R4 is electrically connected to the gate of the second switching device Q2, and the second end of the fourth resistor R4 is grounded; the drain of the second switching device Q2 is electrically connected to the second end of the heating resistor 30, and the source of the second switching device Q2 is grounded; the first end of the heating resistor 30 is electrically connected to the power supply 50.

[0061] In some embodiments, the second switching device Q2 is an NPN transistor; the first end of the third resistor R3 is electrically connected to the first end of the controller 10; the second end of the third resistor R3 is electrically connected to the first end of the fourth resistor R4 and the base of the second switching device Q2; the first end of the fourth resistor R4 is electrically connected to the base of the second switching device Q2, and the second end of the fourth resistor R4 is grounded; the collector of the second switching device Q2 is electrically connected to the second end of the heating resistor 30, and the emitter of the second switching device Q2 is grounded; the first end of the heating resistor 30 is electrically connected to the power supply 50.

[0062] In this embodiment, the first control signal is high level. When the controller 10 receives the airflow detection signal sent by the airflow sensor 40, it sends the first control signal to the second switching device Q2. Then, when the second switching device Q2 receives the first control signal, it turns on, so that the heating resistor 30 is energized and heated.

[0063] In some embodiments, the second control signal is low level, and the third terminal of the controller 10 is electrically connected to the output terminal 401 of the airflow sensor 40. When the output terminal 401 of the airflow sensor 40 outputs a low level signal, the controller 10 sends the second control signal to the second switching device Q2. When the second switching device Q2 receives the second control signal, it disconnects, causing the heating resistor 30 to be de-energized and stop heating.

[0064] Referring to Figure 4, in some embodiments, the heating circuit further includes a temperature detection module 60; the temperature detection module 60 is disposed in the second preset area A2 where the heating resistor 30 is located, the temperature detection module 60 is electrically connected to the controller 10, the temperature detection module 60 is used to be electrically connected to the power supply 50, and to collect the temperature of the heating resistor 30, and to generate a voltage signal based on the temperature of the heating resistor 30; the controller 10 is also used to send a second control signal to the switch module 20 when the voltage signal is abnormal; the switch module 20 is also used to disconnect when the second control signal is received, so that the heating resistor 30 is de-energized and stops heating.

[0065] In some embodiments, the second preset region A2 is the limited space region where the heating resistor 30 is located. For example, the second preset region A2 is the cubic space region where the heating resistor 30 is located. The temperature detection module 60 is set in the second preset region A2 where the heating resistor 30 is located, so that the heat of the heating resistor 30 can be conducted to the temperature detection module 60, and the temperature detection module 60 can collect the temperature of the heating resistor 30.

[0066] In some embodiments, the second preset region A2 and the first preset region A1 at least partially overlap.

[0067] In some embodiments, the voltage of the voltage signal is positively correlated with the temperature of the heating resistor 30; in other embodiments, the voltage of the voltage signal is negatively correlated with the temperature of the heating resistor 30.

[0068] In some embodiments, an abnormal voltage signal indicates an abnormal temperature of the heating resistor 30.

[0069] In this embodiment, since the temperature detection module 60 is located in the second preset area A2 where the heating resistor 30 is located, the temperature of the heating resistor 30 can be detected by the temperature detection module 60. That is, the temperature of the heating resistor 30 is collected by the temperature detection module 60, and a voltage signal is generated based on the temperature of the heating resistor 30. Then, when the voltage signal is abnormal, the controller 10 sends a second control signal to the switch module 20. Then, the switch module 20 disconnects when it receives the second control signal, so that the heating resistor 30 is de-energized and stops heating, so as to avoid the temperature of the heating resistor 30 continuing to rise and being damaged by overheating, such as the heating resistor 30 burning out.

[0070] In some embodiments, the normal temperature range of the heating resistor 30 is 80°C to 130°C.

[0071] In some embodiments, the temperature detection module 60 includes a fifth resistor R5 and a thermistor Rt; the first end of the fifth resistor R5 is electrically connected to the power supply 50, and the second end of the fifth resistor R5 is electrically connected to the first end of the thermistor Rt and the second end of the controller 10, respectively; the first end of the thermistor Rt is electrically connected to the second end of the controller 10, and the second end of the thermistor Rt is grounded.

[0072] In some embodiments, the expression for the resistance value of the thermistor Rt is:

[0073] rt=V1×r5 / (VDD-V1)

[0074] Where rt is the resistance value of the thermistor Rt, r5 is the resistance value of the fifth resistor R5, V1 is the voltage of the thermistor Rt collected by the controller 10, and VDD is the voltage of the power supply 50.

[0075] In some embodiments, the temperature of the thermistor Rt can be obtained from a preset correspondence table between the resistance value and temperature of the thermistor Rt. Since the temperature of the thermistor Rt represents the temperature of the heating resistor 30, for example, the temperature of the thermistor Rt is equal to the temperature of the heating resistor 30, the temperature of the heating resistor 30 can be known.

[0076] In some embodiments, the thermistor Rt is surface-mount packaged.

[0077] In some embodiments, the thermistor Rt can be a negative temperature coefficient (NTC) thermistor Rt; if the voltage of the voltage signal is less than a first voltage threshold, the voltage signal is determined to be abnormal, indicating that the temperature of the heating resistor 30 is abnormal, that is, the temperature of the heating resistor 30 is too high, and the temperature of the heating resistor 30 is greater than the maximum temperature in the normal temperature range of the heating resistor 30; if the voltage of the voltage signal is greater than or equal to the first voltage threshold, the voltage signal is determined to be normal, indicating that the temperature of the heating resistor 30 is normal, that is, the temperature of the heating resistor 30 is within the normal temperature range of the heating resistor 30;

[0078] In other embodiments, the thermistor Rt can be a positive temperature coefficient thermistor Rt; if the voltage of the voltage signal is greater than a first voltage threshold, the voltage signal is determined to be abnormal, indicating that the temperature of the heating resistor 30 is abnormal, that is, the temperature of the heating resistor 30 is too high, and the temperature of the heating resistor 30 is greater than the maximum temperature in the normal temperature range of the heating resistor 30; if the voltage of the voltage signal is less than or equal to the first voltage threshold, the voltage signal is determined to be normal, indicating that the temperature of the heating resistor 30 is normal, that is, the temperature of the heating resistor 30 is within the normal temperature range of the heating resistor 30.

[0079] In this embodiment, the fifth resistor R5 is a voltage divider resistor. Since the temperature detection module 60 is located in the second preset area A2 where the heating resistor 30 is located, the thermistor Rt is also located in the second preset area A2 where the heating resistor 30 is located. The thermistor Rt is positioned next to the heating resistor 30, thereby collecting the temperature of the heating resistor 30 through the thermistor Rt. That is, the temperature of the heating resistor 30 is represented by the temperature of the thermistor Rt. The voltage signal of the thermistor Rt can represent the temperature of the heating resistor 30. The voltage signal of the thermistor Rt is collected through the second terminal of the controller 10. If the voltage signal is abnormal, it indicates that the temperature of the heating resistor 30 is abnormal. A second control signal is sent to the switch module 20. Then, the switch module 20 disconnects upon receiving the second control signal, causing the heating resistor 30 to be de-energized and stop heating, so as to avoid the temperature of the heating resistor 30 from continuing to rise and being damaged due to overheating.

[0080] In some embodiments, the temperature detection module 60 further includes a first capacitor C1; the first end of the first capacitor C1 is electrically connected to the second end of the fifth resistor R5 and the second end of the controller 10, respectively, and the second end of the first capacitor C1 is grounded.

[0081] In this embodiment, the first capacitor C1 is a filter capacitor.

[0082] In some embodiments, the airflow sensor 40 includes a silicon microphone sensor.

[0083] Silicon microphone sensors are sensors based on micro-electro-mechanical systems (MEMS) technology, primarily used to detect a user's suction actions.

[0084] In this embodiment, when the controller 10 receives the airflow detection signal from the airflow sensor 40, it sends a first control signal to the switch module 20. The switch module 20 then turns on upon receiving the first control signal, energizing the heating resistor 30. Since the heating resistor 30 is located in the first preset area A1 where the airflow sensor 40 is located, the heating resistor 30 heats the membrane in the airflow sensor 40 when the airflow sensor 40 sends the airflow detection signal, i.e., when the user inhales the atomizing matrix in the atomizing device. This increases the temperature of the membrane in the airflow sensor 40, reducing the possibility of condensation formed by the atomizing matrix remaining on the membrane. Consequently, it reduces the possibility of the airflow sensor 40 incorrectly identifying the suction action after suction stops.

[0085] Referring to Figure 5, in some embodiments, the heating circuit further includes a sixth resistor R6 and a second capacitor C2. The first end of the sixth resistor R6 is electrically connected to the power supply 50, and the second end of the sixth resistor R6 is electrically connected to the power supply 50 terminal 402 of the airflow sensor 40. The first end of the second capacitor C2 is electrically connected to the second end of the sixth resistor R6 and the power supply 50 terminal 402 of the airflow sensor 40, respectively. The second end of the second capacitor C2 is grounded, and the ground terminal 403 of the airflow sensor 40 is grounded.

[0086] In this embodiment, the sixth resistor R6 is a current-limiting resistor, the second capacitor C2 is a voltage-stabilizing capacitor, and the power supply 50 supplies power to the airflow sensor 40 through the power supply 50 terminal 402 of the airflow sensor 40.

[0087] Figure 6 illustrates a heating method provided in an embodiment of this application. The heating method is executed by the controller (10) in the aforementioned heating circuit. As shown in Figure 6, the method may include the following steps:

[0088] Step 101: Obtain the airflow detection signal sent by the airflow sensor 40, and record the duration and cumulative number of times the airflow detection signal is acquired.

[0089] Step 102: When the duration exceeds a preset duration threshold and / or the cumulative number of acquisitions exceeds a preset number threshold, a first control signal is sent to the switch module 20 to control the switch module 20 to conduct, so that the heating resistor 30 is energized and heated.

[0090] Referring to Figure 7, in some embodiments, after step 102, the method further includes the following steps:

[0091] Step 103: After a preset time, a second control signal is sent to the switch module 20 to control the switch module 20 to disconnect, so that the heating resistor 30 is de-energized and stops heating.

[0092] The implementation of the above steps is similar to the aforementioned implementation process, and will not be repeated here.

[0093] In this embodiment, by acquiring the airflow detection signal sent by the airflow sensor 40 and recording the duration of the airflow detection signal and the cumulative number of acquisitions, a first control signal is sent to the switch module 20 when the duration exceeds a preset duration threshold and / or the cumulative number of acquisitions exceeds a preset number threshold. This causes the switch module 20 to be turned on, and the heating resistor 30 to be energized and heated. Since the heating resistor 30 is located in the first preset area A1 where the airflow sensor 40 is located, the airflow sensor 40 can be heated by the heating resistor 30 after the user uses the atomizing device to raise the temperature of the air around the airflow sensor 40, thereby evaporating and eliminating the condensate that drips or flows onto the airflow sensor 40, thus reducing the possibility of interference with the detection of the airflow sensor 40.

[0094] Referring to FIG8, this application embodiment also provides an atomizing device 300, including a heating circuit 200 and an airflow sensor 40 as described above. The airflow sensor 40 and the heating resistor 30 in the heating circuit 200 are located in the airflow channel of the atomizing device 300 and are both located in the first preset area A1.

[0095] The specific implementation of the heating circuit 200 in the atomizing device 300 is similar to that described above, and will not be repeated here.

[0096] In related technologies, oil-absorbing cotton is placed around the silicon microphone sensor to absorb the condensate formed on the airflow sensor by the atomizing matrix. However, the oil-absorbing cotton has a limited oil absorption capacity and cannot completely block smoke, so condensate still forms on the diaphragm of the silicon microphone sensor.

[0097] In this embodiment, the controller 10 sends a first control signal to the switch module 20 based on the airflow detection signal sent by the silicon microphone sensor. The switch module 20 then turns on upon receiving the first control signal, energizing the heating resistor 30. Since the heating resistor 30 is located within the first preset area A1 where the silicon microphone sensor is located, it can raise the ambient air temperature around the silicon microphone sensor by heating it when the silicon microphone sensor sends an airflow detection signal, i.e., when the user is inhaling the atomizing matrix in the atomizing device. This evaporates and eliminates the condensate that has accumulated on the silicon microphone sensor, while preventing the formation of new condensate on the silicon microphone sensor. Compared with the oil-absorbing cotton in related technologies, which has limited oil absorption and cannot completely block smoke, and where condensate still forms on the diaphragm of the silicon microphone sensor, this reduces the possibility of condensate forming on the silicon microphone sensor due to residual atomizing matrix. This reduces the possibility of the silicon microphone sensor incorrectly identifying the suction action after suction stops.

[0098] In related technologies, when a user draws atomizing matrix from the atomizing device, the atomizing matrix remains on the airflow sensor, forming condensate. When the atomizing device is powered on again, and the user has not actually drawn atomizing matrix from the atomizing device, the airflow sensor incorrectly identifies the drawing action.

[0099] The embodiments of this application reduce the possibility of condensation forming on the airflow sensor 40 due to the residue of the atomizing matrix, thereby reducing the possibility that the airflow sensor 40 may incorrectly identify a suction action when the atomizing device is powered on again and the user has not actually sucked the atomizing matrix in the atomizing device.

[0100] In summary, in this embodiment, the controller 10 sends a first control signal to the switch module 20 based on the airflow detection signal sent by the airflow sensor 40. The switch module 20 then turns on upon receiving the first control signal, causing the heating resistor 30 to be energized and heated. Since the heating resistor 30 is located in the first preset area A1 where the airflow sensor 40 is located, the airflow sensor 40 sends an airflow detection signal, i.e., after the user uses the atomizing device. The heating resistor 30 then heats the air around the airflow sensor 40, causing the condensate dripping or flowing onto the airflow sensor 40 to evaporate and be eliminated, thereby reducing the possibility of interference with the detection of the airflow sensor 40.

[0101] It should be noted that, without further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be pointed out that the scope of the methods and apparatus in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0102] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A heating circuit, characterized in that, The device includes a controller (10), a switch module (20), and a heating resistor (30). The controller (10) is electrically connected to the switch module (20). The controller (10) is used to be electrically connected to the airflow sensor (40) of the atomizing device and to send a first control signal to the switch module (20) based on the airflow detection signal sent by the airflow sensor (40). The switch module (20) is located in the circuit between the heating resistor (30) and the power supply (50). The switch module (20) is used to turn on when the first control signal is received, so that the heating resistor (30) is energized and heated. The heating resistor (30) is located in the first preset area (A1) where the airflow sensor (40) is located.

2. The heating circuit according to claim 1, characterized in that, The switching module (20) includes a first resistor (R1), a second resistor (R2), and a first switching device (Q1); the first end of the first resistor (R1) is electrically connected to the power supply (50), and the second end of the first resistor (R1) is electrically connected to the second end of the second resistor (R2) and the control end of the first switching device (Q1); the first end of the second resistor (R2) is electrically connected to the first end of the controller (10), and the second end of the second resistor (R2) is electrically connected to the control end of the first switching device (Q1); the first end of the first switching device (Q1) is electrically connected to the power supply (50), and the second end of the first switching device (Q1) is electrically connected to the first end of the heating resistor (30); the second end of the heating resistor (30) is grounded.

3. The heating circuit according to claim 2, characterized in that, The first switching device (Q1) includes PMOS transistors and PNP transistors.

4. The heating circuit according to claim 1, characterized in that, The switching module (20) includes a third resistor (R3), a fourth resistor (R4), and a second switching device (Q2); the first end of the third resistor (R3) is electrically connected to the first end of the controller (10), and the second end of the third resistor (R3) is electrically connected to the first end of the fourth resistor (R4) and the control end of the second switching device (Q2), respectively; the first end of the fourth resistor (R4) is electrically connected to the control end of the second switching device (Q2), and the second end of the fourth resistor (R4) is grounded; the first end of the second switching device (Q2) is electrically connected to the second end of the heating resistor (30), and the second end of the second switching device (Q2) is grounded; the first end of the heating resistor (30) is electrically connected to the power supply (50).

5. The heating circuit according to claim 4, characterized in that, The second switching device (Q2) includes NMOS transistors and NPN transistors.

6. The heating circuit according to any one of claims 1 to 5, characterized in that, The heating circuit further includes a temperature detection module (60); the temperature detection module (60) is located in the second preset area (A2) where the heating resistor (30) is located, the temperature detection module (60) is electrically connected to the controller (10), the temperature detection module (60) is used to be electrically connected to the power supply (50), and to collect the temperature of the heating resistor (30), and to generate a voltage signal based on the temperature of the heating resistor (30); the controller (10) is also used to send a second control signal to the switch module (20) in the event of an abnormal voltage signal; the switch module (20) is also used to disconnect when the second control signal is received, so that the heating resistor (30) is de-energized and stops heating.

7. The heating circuit according to claim 6, characterized in that, The temperature detection module (60) includes a fifth resistor (R5) and a thermistor (Rt); the first end of the fifth resistor (R5) is electrically connected to the power supply (50), and the second end of the fifth resistor (R5) is electrically connected to the first end of the thermistor (Rt) and the second end of the controller (10); the first end of the thermistor (Rt) is electrically connected to the second end of the controller (10), and the second end of the thermistor (Rt) is grounded.

8. The heating circuit according to claim 7, characterized in that, The temperature detection module (60) further includes a first capacitor (C1); the first end of the first capacitor (C1) is electrically connected to the second end of the fifth resistor (R5) and the second end of the controller (10), respectively, and the second end of the first capacitor (C1) is grounded.

9. The heating circuit according to any one of claims 1 to 5, characterized in that, The airflow sensor (40) is of the type including a silicon microphone sensor.

10. An atomizing device (300), characterized in that, Includes a heating circuit (200) and an airflow sensor (40) as described in any one of claims 1 to 9, wherein the airflow sensor (40) and the heating resistor (30) in the heating circuit (200) are located in the airflow channel of the atomizing device (300) and are both located within the first preset area (A1).

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