Energy-saving airflow detection chip, circuit, assembly and electronic atomization device

Abstract

The invention provides an energy-saving airflow detection circuit. The airflow detection circuit comprises a voltage input end; a resistor power supply end; a suction detection module; a logic control module; wherein when the suction detection module judges that the resistance bridge is in a suction state, the suction detection module outputs a suction signal to the logic control module, the logic control module outputs a first signal to the suction detection module, and the suction detection module continuously works or at least part of units of the suction detection module intermittently works; when the suction detection module judges that the resistance bridge is in a non-suction state, the suction detection module outputs a non-suction signal to the logic control module, the logic control module outputs a second signal to the suction detection module, and at least part of units of the suction detection module intermittently work, the power consumed by the suction detection module in the non-suction state is smaller than the power consumed by the suction detection module in the suction state. The embodiment of the invention further provides an airflow detection chip, an airflow detection assembly and an electronic atomization device.

Description

Technical Field

[0001] The present application relates to the field of airflow detection technology, and in particular to an energy-saving airflow detection chip, circuit, component and electronic atomization device. Background Art

[0002] With the development of heating atomization technology, electronic atomization devices that use electricity to heat atomization have emerged. Electricity is used to heat the atomized liquid. The electronic atomization device is used to heat the liquid and atomize it into an aerosol for the user to inhale. The electronic atomization device may be a medical electronic atomization device, a common electronic atomization device, etc., and the liquid may be, for example, liquid medicine, e-liquid, etc.

[0003] An existing electronic atomization device triggers the power supply to be turned on by pressing a mechanical switch, thereby heating the atomized liquid for the user to inhale. This method has a low cost, but since it requires the user to perform additional manual operations, it does not conform to the user's usage habits and brings inconvenience to the user.

[0004] Another existing electronic atomization device uses a capacitor microphone to trigger the power supply. The specific principle is to use two diaphragms to form a capacitor, one of which changes with the airflow, and the other does not move. When inhaling, the air inside the electronic atomization device forms a negative pressure, which causes the distance between the two diaphragms to change, resulting in a change in the capacitance value. The detection circuit of the electronic atomization device controls whether to atomize the liquid by detecting the change in capacitance value. This type of electronic atomization device conforms to the user's usage habits, but the structural design is complex and the material cost is high. In addition, when the liquid leaks after the electronic atomization device has been used for a long time, the liquid contaminates the variable membrane, affecting the change in capacitance value, and is prone to false triggering and causing dangerous accidents.

[0005] There is also an existing electronic atomization device that replaces the capacitor microphone solution with a resistor bridge solution. The principle of the resistor bridge is that the flow of air will cause the resistance of the resistor bridge to change, which in turn causes the output voltage to change. The change in voltage is detected to control whether to atomize the liquid. This type of electronic atomization device conforms to the user's usage habits, and even if the resistor bridge is contaminated, the impact is small. However, this solution requires real-time detection of changes in the output voltage of the resistor bridge, resulting in higher power consumption. Summary of the invention

[0006] The technical problem to be solved by the embodiments of the present application is to provide an energy-saving airflow detection chip, circuit, component and electronic atomization device to effectively reduce the power consumption of the airflow detection circuit in view of the deficiencies of the prior art.

[0007] In order to solve the above technical problems, a first aspect of an embodiment of the present application provides an energy-saving airflow detection circuit, which is used to be connected to a resistance bridge. The airflow detection circuit includes:

[0008] System power supply terminal and system ground terminal, which are used to connect to the positive terminal and negative terminal of the power supply respectively;

[0009] A voltage input terminal, which is used to receive the output voltage of the resistance bridge;

[0010] A resistor power supply terminal, which is used to connect to a resistor bridge;

[0011] a puff detection module connected to the voltage input terminal and used to determine the state of the resistance bridge according to the voltage received by the voltage input terminal;

[0012] A logic control module connected to the suction detection module;

[0013] When the puff detection module determines that the resistance bridge is in a puff state, the puff detection module outputs a puff signal to the logic control module, the logic control module outputs a first signal to the puff detection module, the puff detection module works continuously or at least some units of the puff detection module work intermittently; when the puff detection module determines that the resistance bridge is in a non-puff state, the puff detection module outputs a non-puff signal to the logic control module, the logic control module outputs a second signal to the puff detection module, and at least some units of the puff detection module work intermittently; wherein, the power consumption of the puff detection module in the non-puff state is less than that in the puff state.

[0014] Optionally, the puff detection module includes a differential amplifier unit and a voltage comparison unit, wherein the differential amplifier unit is connected to the voltage input end, the differential amplifier unit is also connected to one input end of the voltage comparison unit, the other input end of the voltage comparison unit is connected to a second reference voltage, and the output end of the voltage comparison unit is connected to the logic control module, wherein, in a non-puff state, at least one of the differential amplifier unit and the voltage comparison unit works intermittently.

[0015] Optionally, the puff detection module further includes a reference voltage generating unit, the reference voltage generating unit is used to generate a second reference voltage, and the other input end of the voltage comparison unit is connected to the reference voltage generating unit;

[0016] The second signal is a pulse signal and its frequency is a second frequency. In a non-puffing state, the differential amplifier unit, the voltage comparison unit, and the reference voltage generating unit all work intermittently. The first signal is a pulse signal and its frequency is a first frequency. In a puffing state, the differential amplifier unit, the voltage comparison unit, and the reference voltage generating unit all work intermittently. The first frequency is greater than the second frequency.

[0017] Optionally, the logic control module is connected to the enable end of at least some units of the puff detection module, the first signal is a continuous enable signal or a pulse signal, the second signal is a pulse signal, the pulse signal includes alternating enable signals and disable signals, and when the at least some units of the puff detection module receive the enable signal, they work, and when the at least some units of the puff detection module receive the disable signal, they do not work.

[0018] Optionally, the puff detection module includes a second power supply control unit, wherein one end of the second power supply control unit is connected to the system power supply end or the system ground end, and the other end of the second power supply control unit is correspondingly connected to the positive power supply end or the negative power supply end of at least some units of the puff detection module, and the control end of the second power supply control unit is connected to the logic control module, and the second power supply control unit is used to control whether the power supply supplies power to the at least some units; wherein the second signal is a pulse signal, and the first signal is a pulse signal or a continuous on-signal, and the pulse signal includes alternating on-signals and off-signals, and when the second power supply control unit receives the first signal, the second power supply control unit is used to control the power supply to continuously supply power to the at least some units or to control the power supply to intermittently supply power to the at least some units, and when the second power supply control unit receives the second signal, the second power supply control unit is used to control the power supply to intermittently supply power to the at least some units.

[0019] Optionally, the logic control module includes a first pulse generating unit, a second pulse generating unit, a selector and a reference logic control unit, wherein the first pulse generating unit is used to generate a first pulse signal, and the first signal is the first pulse signal; the second pulse generating unit is used to generate a second pulse signal, and the second signal is the second pulse signal; the output end of the first pulse generating unit and the output end of the second pulse generating unit are connected to the selector, the output end of the selector is connected to the suction detection module, the selection end of the selector is connected to the reference logic control unit, and the reference logic control unit is used to receive a suction signal or a non-suction signal, and when the reference logic control unit receives a suction signal, it outputs a first intermediate signal to the selector, and the selector selects the first pulse signal to output, and when the reference logic control unit receives a non-suction signal, it outputs a second intermediate signal to the selector, and the selector selects the second pulse signal to output.

[0020] Optionally, the logic control module includes a pulse signal generating unit and a reference logic control unit, wherein the pulse signal generating unit can be used to generate a first pulse signal and a second pulse signal, the first signal is the first pulse signal, and the second signal is the second pulse signal, the output end of the pulse signal generating unit is connected to the suction detection module, and the selection end of the pulse signal generating unit is connected to the reference logic control unit, and the reference logic control unit is used to receive a suction signal or a no-suction signal, when the reference logic control unit receives a suction signal, it outputs a first intermediate signal to the pulse signal generating unit, and the pulse signal generating unit generates a first pulse signal output, and when the reference logic control unit receives a no-suction signal, it outputs a second intermediate signal to the pulse signal generating unit, and the pulse signal generating unit generates a second pulse signal output.

[0021] Optionally, the logic control module includes a pulse signal generating unit and a reference logic control unit, the pulse signal generating unit is used to generate a pulse signal, the enable end of the pulse signal generating unit is connected to the reference logic control unit, the output end of the pulse signal generating unit is connected to the puff detection module, when the reference logic control unit receives a puff signal, it outputs a disable signal to the pulse signal generating unit, the pulse signal generating unit does not work and outputs a first signal, the first signal is used to control the puff detection module to work continuously; when the reference logic control unit receives a no-puff signal, it outputs an enable signal to the pulse signal generating unit, the pulse signal generating unit works, the pulse signal generates a pulse signal, the second signal is the pulse signal, the second signal is used to control at least some units of the puff detection module to work intermittently; or,

[0022] The logic control module includes a pulse signal generating unit, a logic gate unit and a reference logic control unit, wherein the logic gate unit is respectively connected to the pulse signal generating unit and the reference logic control unit, and the logic gate unit is also connected to the puff detection module, and the reference logic control unit is used to receive a puff signal or a no-puff signal. When the reference logic control unit receives a puff signal, it outputs a first intermediate signal to the logic gate unit, and the logic gate unit outputs a first signal, and the first signal is used to control the puff detection module to work continuously; when the reference logic control unit receives a no-puff signal, it outputs a second intermediate signal to the logic gate unit, and the logic gate unit outputs a pulse signal, and the second signal is the pulse signal, and the second signal is used to control at least some units of the puff detection module to work intermittently.

[0023] Optionally, the airflow detection circuit includes a first power supply control unit, which is connected to the system power supply terminal and / or the system ground terminal, and is also connected to the resistor power supply terminal, and the first power supply control unit is used to control whether the power supply supplies power to the resistor bridge; wherein, when at least part of the units of the suction detection module are not working, the first power supply control unit is used to control the power supply to stop supplying power to the resistor bridge.

[0024] Optionally, the control end of the first power supply control unit also synchronously receives the first signal and the second signal to control whether the power supply supplies power to the resistance bridge.

[0025] A second aspect of an embodiment of the present application provides an airflow detection component, comprising:

[0026] a resistance bridge configured such that the flow of airflow causes a change in resistance, and when the resistance bridge is powered, the resistance bridge is configured to cause a change in output voltage based on the change in resistance;

[0027] The above-mentioned airflow detection circuit is connected to the resistance bridge.

[0028] Optionally, the resistance bridge includes a first resistor, a second resistor, a third resistor, and a fourth resistor, one of the four resistors is configured so that the flow of airflow causes a change in resistance, the first resistor is connected in series with the second resistor, the third resistor is connected in series with the fourth resistor, and a branch formed by the first resistor and the second resistor in series and a branch formed by the third resistor and the fourth resistor in series are connected in parallel; the resistance bridge also includes a bridge power supply terminal, a bridge ground terminal, a first voltage output terminal and a second voltage output terminal, wherein a connection point where the first resistor and the third resistor are connected is connected to the bridge power supply terminal, a connection point where the second resistor and the fourth resistor are connected is connected to the bridge ground terminal, a connection point where the first resistor and the second resistor are connected is connected to the first voltage output terminal, and a connection point where the third resistor and the fourth resistor are connected is connected to the second voltage output terminal; the number of voltage input terminals of the airflow detection circuit is two, and the two voltage input terminals are correspondingly connected to the first voltage output terminal and the second voltage output terminal;

[0029] The number of the resistance power supply terminal of the airflow detection circuit is one, the resistance power supply terminal is connected to one of the bridge power supply terminal and the bridge ground terminal, and the other of the bridge power supply terminal and the bridge ground terminal is correspondingly connected to the system ground terminal or the system power supply terminal; or,

[0030] The number of the resistance power supply ends of the airflow detection circuit is two, and the two resistance power supply ends are correspondingly connected to the bridge power supply end and the bridge ground end.

[0031] A third aspect of the present application provides an electronic atomization device, comprising:

[0032] Power supply and heating elements;

[0033] The above-mentioned airflow detection component or the above-mentioned airflow detection circuit, the airflow detection circuit also includes a power switch, the control end of the power switch is connected to the logic control module of the airflow detection circuit, one end of the power switch is connected to the power supply through the system power supply end or the system ground end, the other end of the power switch is connected to the heating element, and the other end of the heating element is connected to the power supply, when the suction detection module of the airflow detection circuit determines that the resistance bridge is in the suction state, the suction detection module controls the power switch to be normally turned on or intermittently turned on, and when the suction detection module determines that the resistance bridge is in the non-suction state, the suction detection module controls the power switch to remain disconnected.

[0034] A fourth aspect of the embodiments of the present application provides an energy-saving airflow detection chip, which is used to be connected to a resistance bridge, including:

[0035] System power pin and system ground pin, which are used to connect to the positive and negative terminals of the power supply;

[0036] A voltage input pin for receiving the output voltage of the resistance bridge;

[0037] A resistor power supply pin, which is used to connect to a resistor bridge;

[0038] a puff detection module connected to the voltage input pin and used to determine the state of the resistance bridge according to the voltage received by the voltage input pin;

[0039] A logic control module connected to the suction detection module;

[0040] When the puff detection module determines that the resistance bridge is in a puff state, the puff detection module outputs a puff signal to the logic control module, the logic control module outputs a first signal to the puff detection module, the puff detection module works continuously or at least some units of the puff detection module work intermittently; when the puff detection module determines that the resistance bridge is in a non-puff state, the puff detection module outputs a non-puff signal to the logic control module, the logic control module outputs a second signal to the puff detection module, and at least some units of the puff detection module work intermittently; wherein, the power consumption of the puff detection module in the non-puff state is less than that in the puff state.

[0041] In this embodiment, when the puff detection module determines that the resistance bridge is in a puff state, the puff detection module outputs a puff signal to the logic control module, the logic control module outputs a first signal to the puff detection module, the puff detection module works continuously or at least some units of the puff detection module work intermittently; when the puff detection module determines that the resistance bridge is in a non-puff state, the puff detection module outputs a non-puff signal to the logic control module, the logic control module outputs a second signal to the puff detection module, and at least some units of the puff detection module work intermittently, wherein the power consumption of the puff detection module in the non-puff state is less than that in the puff state. Through such an arrangement, in the normal puffing state (a small part of the time), since the power consumed by the puff detection module itself is very small compared with the power output by the power supply, the continuous operation of the detection module or the intermittent operation of at least some units has little effect on the power of the power supply. In the non-puffing state (most of the time), since the power output by the power supply is relatively small, the power consumption of the puff detection module cannot be ignored. By making at least some units of the puff detection module work intermittently, the power consumption of the puff detection module in the non-puffing state is smaller than that of the puff detection module in the puffing state, which can greatly reduce the power consumption of the puff detection module, reduce the standby power consumption, and extend the standby time of the power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 This is a circuit module diagram of the electronic atomization device of the first embodiment of the present application;

[0044] Figure 2 This is a circuit module implementation diagram of an electronic atomization device according to the first embodiment of the present application;

[0045] Figure 3 This is a partial timing diagram of the electronic atomization device of the first embodiment of the present application;

[0046] Figure 4 This is a circuit module implementation diagram of an electronic atomization device of another embodiment of the first embodiment of the present application;

[0047] Figure 5 This is a circuit module diagram of the electronic atomization device of the second embodiment of the present application;

[0048] Figure 6This is a partial timing diagram of the electronic atomization device of the second embodiment of the present application;

[0049] Figure 7 This is a circuit module implementation diagram of another electronic atomization device of the second embodiment of the present application;

[0050] Figure 8 It is a circuit module diagram of the electronic atomization device of the third embodiment of the present application. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0052] The terms "including" and "having" and any variations thereof appearing in the specification, claims and drawings of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or modules is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units that are inherent to these processes, methods, products or devices. In addition, the terms "first", "second" and "third" are used to distinguish different objects, rather than to describe a specific order. The connection of this application includes direct connection and indirect connection. Indirect connection means that other electronic components, pins, etc. may exist between the two connected components. The XX pin mentioned in this application may be an actual pin, or it may not be an actual pin, for example, it is only a pin of a component or a pin of a wire. The three situations mentioned and / or included in this application, such as A and / or B, include the three situations of A, B, A and B.

[0053] First embodiment

[0054] See also Figure 1 An embodiment of the present application provides an electronic atomization device, which may be a medical electronic atomization device, a common electronic atomization device, or other device that requires heating of liquid. The electronic atomization device uses electricity to heat the liquid and atomize it into an aerosol for inhalation by a user.

[0055] In this embodiment, the electronic atomization device includes a heating component and a power supply control component, and the heating component and the power supply control component can be detachably connected or non-detachably connected. The detachable connection, for example, the heating component and the power supply control component can be plugged in, magnetically connected, or screwed together, and the heating component can be separated from the power supply control component to separate the two. At this time, the heating component can be replaced with a new one as needed, and the power supply control component can be shared, which can save costs; the non-detachable connection means that the heating component cannot be replaced, and the heating component is directly electrically connected to the power supply control component.

[0056] In this embodiment, the heating component includes a heating element R0, and the liquid is stored inside the heating component. The heating element R0 is in contact with the liquid. The heating element R0 is, for example, a heating wire, a heating wire, a ceramic core including a heating wire or a heating wire and a ceramic seat, a cotton core including a heating wire or a heating wire and fiber cotton, or other conventional heating elements R0. The heating element R0 is powered to heat and atomize the liquid, thereby generating an aerosol for the user to inhale.

[0057] In this embodiment, the power supply control component includes a power supply 110, a resistance bridge 200, and an airflow detection circuit. The power supply 110 can be a battery, an AC-DC converter, a DC-DC converter, etc., preferably a rechargeable battery; the resistance bridge 200 is configured so that the flow of airflow causes a change in resistance. One implementation of the resistance bridge 200 includes a Wheatstone bridge. For details, see Figure 2The resistor bridge 200 includes four resistors, namely a first resistor R21, a second resistor R22, a third resistor R23, and a fourth resistor R24, wherein the first resistor R21 is connected in series with the second resistor R22, the third resistor R23 is connected in series with the fourth resistor R24, and a branch formed by the first resistor R21 and the second resistor R22 in series and a branch formed by the third resistor R23 and the fourth resistor R24 ​​in series are connected in parallel, wherein one of the four resistors is related to the airflow, and this embodiment is described by taking the third resistor R23 as an example, when the airflow flows through the third resistor R23, both sides of the third resistor R23 The air pressure will be different, the resistance of the third resistor R23 will change, and the total resistance of the resistor bridge 200 will also change. For example, when there is no airflow or the airflow is very small, the resistance of the third resistor R23 is the standard resistance. When the user sucks and the air pressure on one side of the third resistor R23 decreases, the resistance of the third resistor R23 will increase, for example, relative to the standard resistance. When the user blows and the air pressure on one side of the third resistor R23 increases, the resistance of the third resistor R23 will decrease, for example, relative to the standard resistance (this embodiment is described as an example), or the relationship between the resistance value and the air pressure change is reversed. The present application determines whether it is sucking, blowing, or no airflow by detecting the change in the resistance of the third resistor R23. The corresponding states are the sucking state, the blowing state, and the unused state, where the blowing state and the unused state are called the unsucking state. In addition, in other embodiments of the present application, the resistance of the third resistor R23 does not change with the airflow, and the resistance of one of the first resistor R21, the second resistor R22, and the fourth resistor R24 ​​may change with the airflow. Those skilled in the art can adjust the corresponding relationship as needed.

[0058] In order to detect the change of the resistance value of the third resistor R23, in the present embodiment, when the electronic atomization device is in an unused state, the ratio of the resistance value of the first resistor R21 to the resistance value of the second resistor R22 is equal to the ratio of the resistance value of the third resistor R23 to the resistance value of the fourth resistor R24. When the electronic atomization device is in a puffing state, since the resistance values ​​of the first resistor R21, the second resistor R22, and the fourth resistor R24 ​​are almost unchanged, the resistance value of the third resistor R23 will increase relative to the standard resistance value, resulting in the resistance value of the first resistor R21 and the second resistor R22 being equal. The ratio of the resistance values ​​of the first resistor R21 to the second resistor R22 is smaller than the ratio of the resistance values ​​of the third resistor R23 to the resistance values ​​of the fourth resistor R24. When the electronic atomization device is in the blowing state, since the resistance values ​​of the first resistor R21, the second resistor R22, and the fourth resistor R24 ​​are almost unchanged, the resistance value of the third resistor R23 will decrease relative to the standard resistance value, resulting in the ratio of the resistance value of the first resistor R21 to the resistance value of the second resistor R22 being greater than the ratio of the resistance value of the third resistor R23 to the resistance value of the fourth resistor R24. Therefore, the state of the resistance bridge 200 can be determined according to the relationship between the resistance values.

[0059] Since the change of the resistance value itself is difficult to measure, the present application converts the resistance change into a voltage change for measurement. In this embodiment, the resistance bridge 200 also includes a bridge power supply terminal VDD, a bridge ground terminal VSS, a first voltage output terminal Vout1 and a second voltage output terminal Vout2, wherein the connection point where the first resistor R21 and the third resistor R23 are connected is called a first connection point, the first connection point is connected to the bridge power supply terminal VDD, the connection point where the second resistor R22 and the fourth resistor R24 ​​are connected is called a second connection point, the second connection point is connected to the bridge ground terminal VSS, the connection point where the first resistor R21 and the second resistor R22 are connected is called a third connection point, the third connection point is connected to the first voltage output terminal Vout1, the connection point where the third resistor R23 and the fourth resistor R24 ​​are connected is called a fourth connection point, and the fourth connection point is connected to the second voltage output terminal Vout2.

[0060] In this embodiment, the resistance bridge 200 may preferably be formed as a MEMS (Micro-Electro-Mechanical System). In this case, the resistance bridge 200 is formed on the same semiconductor substrate.

[0061] Please refer to Figure 1 and Figure 2 In this embodiment, the airflow detection circuit includes a system power supply terminal VBAT+, a system ground terminal VBAT-, a voltage input terminal SW, and a resistor power supply terminal GD. Among them, the system power supply terminal VBAT+ is connected to the positive terminal of the power supply 110, and the system ground terminal VBAT- is connected to the negative terminal of the power supply 110. The number of the resistor power supply terminal GD can be one or two. When it is one, the resistor power supply terminal GD is connected to one of the bridge power supply terminal VDD and the bridge ground terminal VSS of the resistor bridge 200, and the other of the bridge power supply terminal VDD and the bridge ground terminal VSS is connected to the system ground terminal VBAT- or the system power supply terminal VBAT+. When the number of the resistor power supply terminal GD is two, the two resistor power supply terminals GD are called the first resistor power supply terminal GD1 and the second resistor power supply terminal GD2. The first resistor power supply terminal GD1 is connected to the bridge power supply terminal VDD, and the second resistor power supply terminal GD2 is connected to the bridge ground terminal VSS. This embodiment takes the number of the resistor power supply terminal GD as one as an example for explanation. In this embodiment, the resistor power supply terminal GD is connected to the bridge power supply terminal VDD, and the bridge ground terminal VSS is connected to the system ground terminal VBAT-. In this embodiment, there are two voltage input terminals SW, which are called the first voltage input terminal SW1 and the second voltage input terminal SW3, wherein the first voltage input terminal SW1 is connected to the first voltage output terminal Vout1 of the resistor bridge 200, and the second voltage input terminal SW3 is connected to the second voltage output terminal Vout2 of the resistor bridge 200, and the voltage difference between the first voltage output terminal Vout1 and the second voltage output terminal Vout2 is the output voltage.

[0062] In this embodiment, the airflow detection circuit further includes a first power supply control unit 120, which is used to control whether the power supply 110 supplies power to the resistance bridge 200, and the power supply to the resistance bridge 200 is used to convert the resistance change into the voltage change. When the first power supply control unit 120 controls the power supply 110 not to supply power to the resistance bridge 200, the voltage output by the first voltage output terminal Vout1 is, for example, the voltage of the system ground terminal VBAT- or the voltage of the system power supply terminal VBAT+, and the voltage output by the second voltage output terminal Vout2 is, for example, also the voltage of the system ground terminal VBAT- or the voltage of the system power supply terminal VBAT+. At this time, the voltage difference between the first voltage input terminal SW1 and the second voltage input terminal SW3 is 0, and there is no current in the resistance bridge 200; when the first power supply control unit 120 supplies power to the resistance bridge 200, there is current in both branches of the resistance bridge 200, and the voltage output by the first voltage output terminal Vout1 is as follows:

[0063] Vin1*R1 / (R1+R2);

[0064] Wherein, Vin1 is the voltage at the bridge power supply terminal VDD, R1 is the resistance value of the first resistor R21, and R2 is the resistance value of the second resistor R22.

[0065] At this time, the voltage of the second voltage output terminal Vout2 is as follows:

[0066] Vin1*R3 / (R3+R4);

[0067] Wherein, Vin1 is the voltage at the bridge power supply terminal VDD, R3 is the resistance value of the third resistor R23, and R4 is the resistance value of the fourth resistor R24.

[0068] When there is no airflow, Vin1*R1 / (R1+R2)=Vin1*R3 / (R3+R4), so the voltage output by the first voltage output terminal Vout1 is equal to the voltage output by the second voltage output terminal Vout2. At this time, the voltage difference between the first voltage input terminal SW1 and the second voltage input terminal SW3 is 0 or close to 0. When there is airflow, the resistance value of the third resistor R23 will change, and the resistance value will increase or decrease. At this time, Vin1*R1 / (R1+R2) is not equal to Vin1*R3 / (R3+R4). Therefore, this embodiment can determine the change in the resistance of the resistance bridge 200 by detecting the voltage difference between the first voltage input terminal SW1 and the second voltage input terminal SW3, and compare the voltage difference with the preset threshold voltage (the second reference voltage Vref2 mentioned later), so as to determine whether the resistance bridge 200 is in the suction state.

[0069] Please continue to refer to Figure 1 and Figure 2 In this embodiment, the airflow detection circuit further includes a suction detection module 130, a logic control module 140 and a power switch M1. The suction detection module 130 is connected to the first voltage input terminal SW1 and the second voltage input terminal SW3 respectively. The suction detection module 130 is used to detect the state of the resistance bridge 200, for example, to determine whether the resistance bridge 200 is in a suction state or a non-suction state. When the suction detection module 130 determines that the resistance bridge 200 is in a suction state, the suction detection module 130 outputs a suction signal. When the suction detection module 130 determines that the resistance bridge 200 is in a non-suction state, the suction detection module 130 outputs a non-suction signal. In this embodiment, the logic control module 140 is respectively connected to the puff detection module 130 and the control end of the power switch M1, the first end of the power switch M1 is connected to the system power supply end VBAT+ or the system ground end VBAT-, the second end of the power switch M1 is connected to one end of the heating element R0 through the atomization end AT, and the other end of the heating element R0 is correspondingly connected to the negative end of the power supply 110 or the positive end of the power supply 110.

[0070] In this embodiment, the suction detection module 130 determines whether the resistance bridge 200 is in the suction state or the non-suction state through the voltage difference between the first voltage input terminal SW1 and the second voltage input terminal SW3, and further determines whether the electronic atomization device is in the suction state or the non-suction state. When the suction detection module 130 determines that the resistance bridge 200 is in the suction state, the suction detection module 130 outputs a suction signal to the logic control module 140, and the logic control module 140 controls the power switch M1 to be always on or intermittently on to generate aerosols for atomizing liquids. When the suction detection module 130 determines that the electronic atomization device is in the non-suction state, the suction detection module 130 outputs a non-suction signal to the logic control module 140, and the logic control module 140 controls the power switch M1 to be disconnected and cut off.

[0071] In order to reduce the energy consumption of the airflow detection circuit and increase the standby time, in the present embodiment, when the suction detection module 130 determines that the resistance bridge 200 is in the suction state, the suction detection module 130 outputs a suction signal to the logic control module 140, and the logic control module 140 outputs a first signal to the suction detection module 130. Under the control of the first signal, the suction detection module 130 continues to work, and the suction detection module 130 continuously detects the state of the resistance bridge 200; when the suction detection module 130 determines that the resistance bridge 200 is in the non-suction state, the suction detection module 130 outputs a non-suction signal to the logic control module 140, and the logic control module 140 outputs a second signal to the suction detection module 130. Under the control of the second signal At least some units of the puff detection module 130 work intermittently. Intermittent work is periodic work. Each cycle includes a working time period and a non-working time period. During the working time period, all units of the puff detection module 130 work. At this time, the puff detection module 130 can detect the state of the resistance bridge 200. During the non-working time period, at least some units of the puff detection module 130 do not work. Since at least some units do not work, the state of the resistance bridge 200 cannot be detected at this time. This processing can save energy consumption. In the non-puffing state, the frequency of the puff detection module 130 is the second frequency, which is consistent with the frequency of the second signal. The second frequency is preferably greater than or equal to 10 Hz. The puff detection response at this frequency is more timely.

[0072] In this embodiment, since the suction detection module 130 works continuously in the puffing state, and at least part of the units of the puff detection module 130 work intermittently in the non-puffing state, the power consumption of the puff detection module 130 in the non-puffing state is less than the power consumption in the puffing state, which is conducive to reducing power consumption and increasing the standby time. In this embodiment, since the state of the resistance bridge 200 is continuously detected in the puffing state, the state of the resistance bridge 200 is intermittently detected in the non-puffing state. Such a design can not only reduce power consumption, but also conform to the user's usage habits. Moreover, generally speaking, after the resistance bridge 200 enters the puffing state from the non-puffing state, the user generally puffs more frequently. At this time, the state of the resistance bridge 200 is continuously detected, and the puff detection module 130 can better respond to the puffing state, and the response is very rapid; when the resistance bridge 200 enters the non-puffing state from the puffing state, the user will not perform a puffing action most of the time. At this time, the puff detection module 130 works intermittently and performs puff detection intermittently, which can not only reduce the standby power consumption in the non-puffing state, but also detect the user's puffing action more promptly. Moreover, in the puffing state, since the heating element R0 will work, the puff detection module 130 continues to perform puff detection. The power consumption of the puff detection module 130 when it continues to work is much less than the power consumption of the heating element R0, and the puffing state itself is also in a shorter time. Therefore, even if the puff detection module 130 continues to work in the puffing state, the overall power consumption of the puff detection module 130 is limited, especially much less than the power consumption of the heating element R0. Since the resistance bridge 200 is in a non-puffing state most of the time, the heating element R0 itself does not consume power, and the power consumption of the puff detection module 130 accounts for the majority. Therefore, intermittent puff detection can increase the standby time of the power supply 110.

[0073] In this embodiment, the puff detection module 130 includes a differential amplifier unit 131, a voltage comparison unit 132, and a reference voltage generation unit 133. The two input terminals of the differential amplifier unit 131 are connected to the first voltage input terminal SW1 and the second voltage input terminal SW3 respectively, the output terminal of the differential amplifier unit 131 is directly or indirectly connected to one input terminal of the voltage comparison unit 132, the other input terminal of the voltage comparison unit 132 is connected to the reference voltage generation unit 133, the reference voltage generation unit 133 is used to generate the second reference voltage Vref2, the reference voltage generation unit 133 can be a conventional bandgap voltage reference, and this embodiment is described by taking this as an example, the output terminal of the voltage comparison unit 132 is connected to the logic control module 140, and the logic control module 140 is directly or indirectly connected to the control terminal of the power switch M1. In this embodiment, the differential amplifier unit 131 is used to amplify the voltage difference between the first voltage input terminal SW1 and the second voltage input terminal SW3 and then output it. The output voltage is input to the voltage comparison unit 132. The voltage comparison unit 132 compares the input voltage with the second reference voltage Vref2. If the input voltage is greater than or equal to the second reference voltage Vref2, it indicates that the electronic atomization device is inhaled and the resistance bridge 200 is in a suction state. If the input voltage is less than the second reference voltage Vref2, it indicates that the electronic atomization device is not inhaled and the resistance bridge 200 is in a non-inhalation state (this embodiment is used as an example for explanation), or the size relationship is reversed. Correspondingly, the voltage comparison unit 132 outputs a suction signal or a non-suction signal to the logic control module 140, and then the logic control module 140 controls the power switch M1. For example, when in the suction state, the logic control module 140 controls the power switch M1 to be always on or intermittently on, so as to atomize the liquid to generate an aerosol. When in the non-suction state, the logic control module 140 controls the power switch M1 to remain disconnected. In addition, in other embodiments of the present application, the suction detection module 130 can also be equipped with other module units as needed.

[0074] In this embodiment, the logic control module 140 is connected to the puff detection module 130. In the puff state, the logic control module 140 controls the puff detection module 130 to work continuously. In the non-puff state, the logic control module 140 controls at least some units of the puff detection module 130 to work intermittently, and its working frequency is the second frequency.

[0075] In order to reduce power consumption as much as possible, in this embodiment, all units of the puff detection module 130 in the non-puff state work synchronously and intermittently. Here, in the non-working time period, the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generation unit 133 are all synchronously non-working. At this time, the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generation unit 133 do not consume power. In the working time period, the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generation unit 133 all work synchronously. In addition, in other embodiments of the present application, in the non-puff state, one or two of the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generation unit 133 work intermittently. Here, in the non-working time period, one or two of the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generation unit 133 are synchronously non-working, and the other two or the other one is always working. In the working time period, the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generation unit 133 all work synchronously.

[0076] In order to achieve intermittent operation of the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generating unit 133 in the non-puffing state, and the synchronization of the three, in the present embodiment, the logic control module 140 includes a pulse signal generating unit 143, a logic gate unit 142, and a reference logic control unit 141. The pulse signal generating unit 143 is used to generate a periodic pulse signal, such as a rectangular wave, a square wave, etc. The pulse signal generating unit 143 and the reference logic control unit 141 are both connected to the logic gate unit 142. The logic gate unit 142 is also connected to the puff detection module 130, specifically to the enable end of the differential amplifier unit 131, the enable end of the voltage comparison unit 132, and the enable end of the reference voltage generating unit 133. The reference logic control unit 141 is used to generate a first intermediate signal and a second intermediate signal according to the state of the resistance bridge 200. When the non-pumped signal generated by the voltage comparison unit 132 is received by the reference logic control unit 141, the reference logic control unit 141 outputs a second intermediate signal. At this time, the logic gate unit 142 outputs a pulse signal, that is, the second signal is a pulse signal, which comes from the pulse signal generating unit 143, and the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generating unit 133 work intermittently; when the puffed signal generated by the voltage comparison unit 132 is received by the reference logic control unit 141, the reference logic control unit 141 outputs a first intermediate signal. At this time, the logic gate unit 142 outputs a continuous enable signal (enable), that is, the first signal is a continuous enable signal, and the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generating unit 133 work continuously, and do not work intermittently at this time.

[0077] Specifically, in this embodiment, please refer to Figure 2 and Figure 3The logic gate unit 142 includes an OR gate, one input end of the OR gate is connected to the pulse signal generating unit 143, and the other input end is connected to the reference logic control unit 141. The output end of the OR gate is connected to the enable end of the differential amplifier unit 131, the enable end of the voltage comparison unit 132, and the enable end of the reference voltage generating unit 133. When the electronic atomization device is in a non-inhalation state, the reference logic control unit 141 outputs a low level (a second intermediate signal) to the OR gate. At this time, the OR gate outputs a pulse signal (a second signal) to the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generating unit 133. The pulse signal includes an alternate enable signal and a disable signal. When the pulse signal is an enable signal, the reference logic control unit 141 outputs a low level (a second intermediate signal) to the OR gate. When the pulse signal is a disable signal (high level), the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generating unit 133 all work; when the pulse signal is a disable signal (low level), the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generating unit 133 all do not work; when the electronic atomization device is in the inhalation state, the reference logic control unit 141 outputs a high level (the first intermediate signal) to the OR gate, and the OR gate continuously outputs an enable signal (enable, the first signal) to the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generating unit 133, and the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generating unit 133 continue to work. In addition, in other embodiments of the present application, the logic gate unit 142 includes a NAND gate, and the two input ends of the NAND gate are correspondingly connected to the pulse signal generating unit 143 and the reference logic control unit 141, and the output end of the NAND gate is connected to the enable end of the differential amplifier unit 131, the enable end of the voltage comparison unit 132, and the enable end of the reference voltage generating unit 133. When the electronic atomization device is in a non-inhalation state, the reference logic control unit 141 outputs a high level (a second intermediate signal) to the NAND gate. At this time, the NAND gate outputs an inverse signal of the pulse signal (a second signal, also a pulse signal) to the enable end of the differential amplifier unit 131, the enable end of the voltage comparison unit 132, and the enable end of the reference voltage generating unit 133. When the pulse signal is an enable signal (enable), the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generating unit 133 do not work. When the pulse signal is a disable signal (no When the electronic atomization device is in the inhalation state, the reference logic control unit 141 outputs a low level (a first intermediate signal) to the NAND gate, and the NAND gate continuously outputs an enable signal (a first signal) to the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generation unit 133, and the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generation unit 133 continue to work.In addition, in other embodiments of the present application, those skilled in the art may also set other logic gate circuits in the logic gate unit 142 as needed, and the first intermediate signal and the second intermediate signal may be designed as needed, such as edge trigger signals, etc. In addition, in other embodiments of the present application, when one or two of the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generation unit 133 need to work intermittently in the non-pumping state, the enable end of the corresponding unit is connected to the output of the logic gate unit 142.

[0078] In order to further reduce power consumption, in this embodiment, the output end of the logic gate unit 142 is also connected to the first power supply control unit 120 via the first inverter IV1. The first power supply control unit 120 includes a first switch K1. The first end of the first switch K1 is connected to the system power supply terminal VBAT+, and the second end of the first switch K1 is connected to the resistor power supply terminal GD. The first switch K1 can control whether the power supply 110 supplies power to the resistor bridge 200. In addition, in other embodiments of the present application, the first end of the first switch K1 is connected to the system ground terminal VBAT-, the second end of the first switch K1 is connected to the bridge ground terminal VSS, and the bridge power supply terminal VDD of the resistor bridge 200 is connected to the system power supply terminal VBAT+. In this case, the first inverter IV1 may not be required. In this embodiment, the first switch K1 is a MOS tube, a triode, etc., and the MOS tube is, for example, a PMOS tube (using this as an example in the figure) or an NMOS tube. In this embodiment, when the logic gate unit 142 receives the first intermediate signal, the logic gate unit 142 continuously outputs an enable signal (first signal), and the continuous enable signal is used to make the first power supply control unit 120 continuously turned on, so that the power supply 110 continuously supplies power to the resistance bridge 200; when the logic gate unit 142 receives the second intermediate signal, the logic gate unit 142 outputs a pulse signal (second signal), and the first power supply control unit 120 is intermittently turned on, so that the power supply 110 intermittently supplies power to the resistance bridge 200. The pulse signal includes an alternate enable signal and a disable signal. When the pulse signal is an enable signal, the first power supply control unit 120 is turned on, so that the power supply 110 supplies power to the resistance bridge 200, and when the pulse signal is a disable signal (no enable), the first power supply control unit 120 is turned off, so that the power supply 110 stops supplying power to the resistance bridge 200. In this embodiment, when the first switch K1 is turned on, the resistance bridge 200 is powered, and the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generation unit 133 all work synchronously, and the suction detection module 130 can detect the state of the resistance bridge 200; when the first switch K1 is turned off, the resistance bridge 200 is not powered, and the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generation unit 133 all do not work synchronously, and the suction detection module 130 does not detect the state of the resistance bridge 200. This embodiment can further reduce power consumption by such a setting. In this embodiment, the working state of the resistance bridge 200 and the working state of the suction detection module 130 need to be synchronized to prevent the misjudgment of the state detection caused by the asynchronous operation of the two.

[0079] In addition, the first power supply control unit 120 of the present application is not limited to the first switch K1. In other embodiments of the present application, the first power supply control unit 120 may also include a voltage stabilizing unit 310, or the first power supply control unit 120 may also include a constant current source and a first switch K1, etc. For specific descriptions, please refer to the applicant's prior application patent CN202311127344.4. The content of the prior patent application is also introduced into the present application as the content of the present application. Technicians in this field can make adaptive modifications as needed, which will not be repeated here.

[0080] In addition, in other embodiments of the present application, see Figure 4 The logic control module 140 may also not include the logic gate unit 142. In this case, the logic control module 140 includes a pulse signal generating unit 143 and a reference logic control unit 141. The pulse signal generating unit 143 is used to generate a pulse signal. The enable end of the pulse signal generating unit 143 is connected to the reference logic control unit 141, and the output end of the pulse signal generating unit 143 is connected to the suction detection module 130. When the electronic atomization device is in a non-puffing state, the reference logic control unit 141 outputs an enable signal (enable) to the pulse signal generating unit 143, that is, the second intermediate signal is an enable signal, the pulse signal generating unit 143 works, and the pulse signal generated by the pulse signal generating unit 143 is given to the puff detection module 130, that is, the second signal is a pulse signal. When the pulse signal is an enable signal, the puff detection module 130 works. When the pulse signal is a disable signal, the unit corresponding to the puff detection module 130 connected to the pulse signal generating unit 143 does not work, for example, one of the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generating unit 133, two of them, or all of the puff detection module 130 do not work; when the electronic atomization device is in a puffing state, the reference logic control unit 141 outputs a disable signal (no enable) to the pulse signal generating unit 143, that is, the first intermediate signal is a disable signal. At this time, the pulse signal generating unit 143 continuously outputs an enable signal to the puff detection module 130, that is, the first signal is a continuous enable signal, and the puff detection module 130 continues to work.

[0081] In the present embodiment, the airflow detection circuit and the resistance bridge 200 constitute an airflow detection component, and the airflow detection circuit judges the state of the resistance bridge 200 by the output voltage of the resistance bridge 200, and then obtains the state of the electronic atomization device. In the present embodiment, the airflow detection component is located in the power supply control component. In addition, in other embodiments of the present application, the airflow detection component may also be located in the heating component. In addition, in other embodiments of the present application, the airflow detection component may also be partially located in the power supply control unit and partially located in the heating component. In addition, the airflow detection component of the present embodiment is not limited to use in electronic atomization devices, and can also be used in other devices that require airflow detection.

[0082] In addition, in other embodiments of the present application, the resistance bridge 200 may not include the Wheatstone bridge. The resistance bridge 200 only includes two resistors, which are the third resistor R23 and the fourth resistor R24. The resistance bridge 200 does not include the first voltage output terminal Vout1. In this scheme, one input terminal of the differential amplifier unit 131 is connected to the second voltage output terminal Vout2, and the other input terminal of the differential amplifier unit 131 is connected to the third reference voltage, which is also generated by the reference voltage generating unit 133. When there is no airflow, the third reference voltage is equal to the voltage of the second voltage output terminal Vout2. When there is airflow, there is a difference between the voltages of the two input terminals of the differential amplifier unit 131. In addition, in other embodiments of the present application, the resistance bridge 200 may also include only one resistor, that is, the third resistor R23, in which case the first end or the second end of the third resistor R23 is the second voltage output terminal Vout2, and in this case the power supply control unit includes a constant current source, which is connected in series with the third resistor R23, and preferably the constant current source is connected to the system power supply terminal VBAT+, in which case the second voltage output terminal Vout2 is connected to one input terminal of the differential amplifier unit 131, and the other input terminal of the differential amplifier unit 131 is connected to the third reference voltage, and when there is no airflow, the third reference voltage is equal to the voltage of the second voltage output terminal Vout2, and when there is airflow, the voltages of the two input terminals of the differential amplifier unit 131 are different. In addition, in other embodiments of the present application, it can also be set to the opposite: when there is no airflow, the voltages of the two input terminals of the differential amplifier unit 131 are greatly different, for example, the difference exceeds 5%, and when there is airflow, the difference of the voltages of the two input terminals of the differential amplifier unit 131 becomes smaller or equal, and the difference is small, for example, not more than 3%.

[0083] In this embodiment, the airflow detection circuit is made on the same semiconductor substrate, that is, it is located on the same chip, which is called an airflow detection chip. At this time, the system power supply terminal VBAT+ corresponds to the system power supply pin, the system ground terminal VBAT- corresponds to the system ground pin, the voltage input terminal SW corresponds to the voltage input pin, the resistor power supply terminal GD corresponds to the resistor power supply pin, and the atomization terminal AT corresponds to the atomization pin. At this time, the resistor bridge 200 is made on another semiconductor substrate. However, the present application is not limited to this. In other embodiments of the present application, the airflow detection circuit except the power switch M1 is made on the same semiconductor substrate, and the power switch M1 is made on another semiconductor substrate. In addition, in other embodiments of the present application, the airflow detection circuit and some resistors in the resistor bridge 200 (excluding the third resistor R23) are made on the same semiconductor substrate, and the third resistor R23 and the like are made on another semiconductor substrate. In addition, in other embodiments of the present application, the circuit of the airflow detection circuit except the power switch M1 and some resistors in the resistance bridge 200 (excluding the third resistor R23) are made on the same semiconductor substrate, the third resistor R23 and others are made on another semiconductor substrate, and the power switch M1 is made on another semiconductor substrate.

[0084] Second embodiment

[0085] See also Figure 5 , Figure 5 This is a circuit module diagram of the electronic atomization device of the second embodiment of the present application. This embodiment is similar to the first embodiment, so the parts not described in this embodiment can refer to the first embodiment. The main difference between this embodiment and the first embodiment is that the suction detection module can further reduce power consumption.

[0086] To further reduce the energy consumption of the airflow detection circuit, refer to Figure 5In the present embodiment, the puff detection module 130 does not continuously detect the state of the resistance bridge 200 at any time. In order to balance the response speed and energy saving, further, when the puff detection module 130 determines that the resistance bridge 200 is in the puff state, the puff detection module 130 outputs a puff signal to the logic control module 140, and the logic control module 140 outputs a first signal to the puff detection module 130. At least some units of the puff detection module 130 work intermittently. Intermittent work is periodic work. In the puff state, its working frequency is the first frequency, that is, the frequency of the first signal is the first frequency, and the first signal is a pulse signal. Each cycle includes a working time period and a non-working time period. In the working time period, all units of the puff detection module 130 work. At this time, the puff detection module 130 can detect the state of the resistance bridge 200. In the non-working time period, at least some units of the puff detection module 130 do not work. Since at least some units do not work, the state of the resistance bridge 200 cannot be detected at this time. Such processing can further save energy. When the puff detection module 130 determines that the resistance bridge 200 is in a non-puff state, the puff detection module 130 outputs a non-puff signal to the logic control module 140, and the logic control module 140 outputs a second signal to the puff detection module 130. At least part of the units of the puff detection module 130 work intermittently. In the non-puff state, its working frequency is the second frequency, that is, the frequency of the second signal is the second frequency, and the second signal is a pulse signal. In the non-puff state, the power consumption of the puff detection module 130 is less than the power consumption in the puff state. In this embodiment, the first frequency is greater than the second frequency, for example, the second frequency is greater than or equal to 10 Hz, and the first frequency is greater than or equal to 20 Hz. In this embodiment, since the first frequency is greater than the second frequency, the state of the resistance bridge 200 is detected more frequently in the puff state, and the interval between two adjacent puff detections is also shorter. In the non-puff state, the state of the resistance bridge 200 is detected relatively less frequently, and the interval between two adjacent puff detections is relatively longer. Such a design can not only reduce power consumption, but also conform to the user's usage habits. Moreover, generally speaking, after the resistance bridge 200 enters the puffing state from the non-puffing state, the user generally puffs more frequently. At this time, the state of the resistance bridge 200 is detected more frequently, and the puff detection module 130 can better respond to the puffing state. When the resistance bridge 200 enters the non-puffing state from the puffing state, the user will not puff most of the time. At this time, the puff detection frequency is less, which can not only reduce the standby power consumption in the non-puffing state, but also detect the user's puffing action more timely.Moreover, in the puffing state, since the heating element R0 will work, the frequency of the puff detection is higher. At this time, the power consumption of the puff detection is very little relative to the power consumption of the heating element R0, and the puffing state itself is in a shorter time, so even if the puff detection frequency is higher in the puffing state, the overall power consumption of the puff detection is limited, especially relative to the power consumption of the heating element R0. Since the resistance bridge 200 is in a non-puffing state most of the time, and since the heating element R0 itself does not consume power at this time, the power consumption of the puff detection cannot be omitted, so the frequency of the puff detection is set lower, which can increase the standby time of the power supply 110. In this embodiment, since at least part of the units of the puff detection module work intermittently in the puffing state, compared with the first embodiment in which the puff detection module works continuously in the puffing state, this embodiment can further reduce power consumption.

[0087] In this embodiment, the puff detection module 130 includes a differential amplifier unit 131, a voltage comparison unit 132, and a reference voltage generation unit 133. The two input terminals of the differential amplifier unit 131 are connected to the first voltage input terminal SW1 and the second voltage input terminal SW3 respectively, the output terminal of the differential amplifier unit 131 is directly or indirectly connected to one input terminal of the voltage comparison unit 132, the other input terminal of the voltage comparison unit 132 is connected to the reference voltage generation unit 133, the reference voltage generation unit 133 is used to generate the second reference voltage Vref2, the output terminal of the voltage comparison unit 132 is connected to the logic control module 140, and the logic control module 140 is directly or indirectly connected to the control terminal of the power switch M1.

[0088] In this embodiment, the logic control module 140 is connected to the suction detection module 130. In the suction state, the logic control module 140 controls at least some units of the suction detection module 130 to work intermittently, and its working frequency is a first frequency. In the non-suction state, the logic control module 140 controls at least some units of the suction detection module 130 to work intermittently, and its working frequency is a second frequency.

[0089] In order to greatly reduce power consumption, in this embodiment, all units of the puff detection module 130 work intermittently in the puff state and in the non-puff state. Here, the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generation unit 133 are all not working in the non-working time period. At this time, the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generation unit 133 do not consume power. In the working time period, the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generation unit 133 are all working. In addition, in other embodiments of the present application, one or two of the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generation unit 133 work intermittently in the puff state and in the non-puff state. Here, one or two of the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generation unit 133 are not working in the non-working time period, and the other two or the other one is always working. In the working time period, the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generation unit 133 are all working.

[0090] In order to realize that the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generation unit 133 all work intermittently and synchronously, please refer to Figure 4 and Figure 5In this embodiment, the logic control module 140 includes a reference logic control unit 141, a pulse signal generating unit 143 and a selector 146. The reference logic control unit 141 receives a suction signal or a non-suction signal, and generates a first intermediate signal and a second intermediate signal accordingly. The pulse signal generating unit 143 includes a first pulse generating unit 144 and a second pulse generating unit 145. The first pulse generating unit 144 is used to generate a first pulse signal, which is a periodic pulse signal, such as a rectangular wave, a square wave, etc. The frequency of the first pulse signal is a first frequency. In this embodiment, the first signal is a first pulse signal. The second pulse generating unit 145 is used to generate a second pulse signal, which is a periodic pulse signal, such as a rectangular wave, a square wave, etc. The frequency of the second pulse signal is a second frequency. In this embodiment, the second signal is a second pulse signal. In this embodiment, the selector 146 is connected to the output end of the first pulse generating unit 144 and the output end of the second pulse generating unit 145 respectively, and the selection end of the selector 146 is connected to the reference logic control unit 141. The reference logic control unit 141 controls the selector 146 to select whether to output the first pulse signal or the second pulse signal. Specifically, when the reference logic control unit 141 outputs the first intermediate signal, the selector 146 selects to output the first pulse signal output, and when the reference logic control unit 141 outputs the second intermediate signal, the selector 146 selects to output the second pulse signal output. The first intermediate signal and the second intermediate signal are different. The first intermediate signal and the second intermediate signal can be high-level signals, low-level signals, rising edge signals, falling edge signals, etc. Figure 6 The first intermediate signal is a high level signal, and the second intermediate signal is a low level signal.

[0091] In the present embodiment, the output of the selector 146 is respectively connected to the enable end of the differential amplifier unit 131, the enable end of the voltage comparison unit 132, and the enable end of the reference voltage generation unit 133. The first pulse signal and the second pulse signal both include an alternate enable signal and a disable signal. When the output of the selector 146 is an enable signal (enable), the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generation unit 133 all work. When the output of the selector 146 is a disable signal (no enable), the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generation unit 133 all do not work. At this time, the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generation unit 133 do not consume power, thereby reducing power consumption. In the present embodiment, the enable signal is, for example, a high-level signal, and the disable signal is, for example, a low-level signal, or vice versa. In addition, in other embodiments of the present application, the output of the selector 146 is connected to one or two of the enable terminals of the differential amplifier unit 131 , the enable terminal of the voltage comparison unit 132 , and the enable terminal of the reference voltage generation unit 133 .

[0092] In order to further reduce power consumption, in this embodiment, the output of the selector 146 is also connected to the first power supply control unit 120, and the first power supply control unit 120 includes a voltage stabilizing unit 310, which is used to output a voltage to the resistance bridge 200 that does not change with the change of the voltage of the power supply 110, and is used to reduce the power consumption of the resistance bridge 200 when it is working, and the logic control module 140 is used to control the voltage stabilizing unit 310, and then control whether the power supply 110 supplies power to the resistance bridge 200. In this embodiment, the selector 146 of the logic control module 140 controls the first power supply control unit 120 to be intermittently turned on.

[0093] In the present embodiment, one implementation of the voltage stabilizing unit 310 is a low dropout regulator (LDO), which includes an operational amplifier 312, a first sampling resistor Rc1, a second sampling resistor Rc2, and an adjustment tube 311, wherein an input end of the adjustment tube 311 is electrically connected to a system power supply terminal VBAT+, an output end of the adjustment tube 311 is directly or indirectly connected to a resistor power supply terminal GD, a control end of the adjustment tube 311 is electrically connected to an output end of the operational amplifier 312, a first end of the operational amplifier 312 is connected to a first reference voltage Vref1, and the first reference voltage Vref1 is generated by a reference voltage generating unit 133 of the puff detection module 130, a second end of the operational amplifier 312 is electrically connected to a first end of the second sampling resistor Rc2, a first end of the first sampling resistor Rc1 is electrically connected to an output end of the adjustment tube 311, a second end of the first sampling resistor Rc1 is electrically connected to a first end of the second sampling resistor Rc2, and a second end of the second sampling resistor Rc2 is electrically connected to a system ground terminal VBAT-. The principle of the low-dropout linear regulator is common knowledge in the art and will not be described in detail here. In addition, it can also be other conventional voltage stabilizing units 310 in the art. In the figure, the adjustment tube 311 is a triode, but the present application is not limited to this. In other embodiments of the present application, the adjustment tube 311 can also be a MOS tube. In this embodiment, a low-dropout linear regulator is used for step-down processing to achieve high efficiency, and the cost is low, the noise is low, and the quiescent current is small. In this embodiment, the intermittent conduction of the first power supply control unit 120 refers to the intermittent conduction of the adjustment tube 311.

[0094] In the present embodiment, the resistance bridge 200 is controlled to be intermittently powered in the puffing state, and is controlled to be intermittently powered in the non-puffing state. In the present embodiment, the output end of the selector 146 is connected to the enable end of the operational amplifier 312. When the puffing detection module 130 determines that the resistance bridge 200 is in the puffing state, the selector 146 outputs a first pulse signal to the operational amplifier 312, and the selector 146 alternately outputs an enable signal (enable) and a disable signal (no enable) to the operational amplifier 312. The first pulse signal is used to make the operational amplifier 312 alternately in an enabled state and a disabled state, so that the adjustment tube 311 is intermittently turned on to intermittently power the resistance bridge 200. When the puffing detection module 130 determines that it is in the non-puffing state, the selector 146 outputs a second pulse signal to the operational amplifier 312, and the selector 146 alternately outputs an enable signal (enable) and a disable signal (no enable). The second pulse signal is used to enable the operational amplifier 312 to be alternately in an enabled state and a disabled state, so that the operational amplifier 312 is intermittently in an enabled state to make the adjustment tube 311 intermittently turned on to intermittently power the resistance bridge 200. In this embodiment, the power supply of the resistance bridge 200 corresponds to the operation of the suction detection module 130. When the selector 146 outputs an enable signal, the operational amplifier 312 is in an enabled state, the resistance bridge 200 is powered, and the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generation unit 133 are all in an enabled state. The suction detection module 130 cooperates with the resistance bridge 200 to determine the state of the resistance bridge 200; when the selector 146 outputs a disable signal, the operational amplifier 312 is in a disabled state, the adjustment tube 311 is disconnected, the resistance bridge 200 is not powered, and the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generation unit 133 are all in a disabled state, and the suction detection module 130 cannot determine the state of the resistance bridge 200. By setting in this way, the power consumption of the airflow detection circuit can be greatly reduced.

[0095] In addition, the first power supply control unit 120 of the present application is not limited to the voltage stabilizing unit 310. In other embodiments of the present application, the first power supply control unit 120 may also include a first switch K1, or the first power supply control unit 120 may also include a constant current source and a first switch K1, etc. For a specific description, please refer to the applicant's prior patent application CN202311127344.4. The content of the prior patent application is also introduced into the present application as the content of the present application. Since the first power supply control unit 120 is intermittently turned on in the suction state, technicians in this field can make adaptive modifications as needed, which will not be repeated here. In this state, the first power supply unit is intermittently turned on at a first frequency in the suction state, and the first power supply unit is intermittently turned on at a second frequency in the non-suction state.

[0096] In addition, in other embodiments of the present application, see Figure 7 , the logic control module 140 includes a pulse signal generating unit 143 and a reference logic control unit 141. The pulse signal generating unit 143 can be used to generate a first pulse signal and a second pulse signal. The output end of the pulse signal generating unit 143 is connected to the suction detection module 130, and the selection end of the pulse signal generating unit 143 is connected to the reference logic control unit 141. The reference logic control unit 141 is used to output a first intermediate signal or a second intermediate signal. When the reference logic control unit 141 receives a suction signal, it outputs a first intermediate signal. The pulse signal generating unit 143 generates and outputs a first pulse signal, that is, the first signal is a first pulse signal. When the reference logic control unit 141 receives a non-suction signal, it outputs a second intermediate signal. The pulse signal generating unit 143 generates and outputs a second pulse signal, that is, the second signal is a second pulse signal. In this embodiment, the output end of the pulse signal generating unit 143 is connected to the enable end of the differential amplifier unit 131, the enable end of the voltage comparison unit 132, the enable end of the reference voltage generating unit 133, and the enable end of the operational amplifier 312. However, the present application is not limited to this. In other embodiments of the present application, the output end of the pulse signal generating unit 143 is connected to the enable end of one of the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generating unit 133, or the enable ends of two of them, so that at least some units of the puff detection module 130 work intermittently in the puff state and the non-puff state.

[0097] Third embodiment

[0098] See also Figure 8 , Figure 8This is a circuit module diagram of the electronic atomization device of the third embodiment of the present application. This embodiment is similar to the second embodiment, so the parts not described in this embodiment can refer to the second embodiment. The main difference between this embodiment and the second embodiment is the way to make at least part of the units of the puff detection module work intermittently.

[0099] Please refer to 8. In this embodiment, in addition to the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generation unit 133, the puff detection module 130 also includes a second power supply control unit 134. The second power supply control unit 134 is used to control whether the power supply 110 supplies power to the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generation unit 133. Specifically, one end of the second power supply control unit 134 is connected to the system power supply terminal VBAT+, and the other end of the second power supply control unit 134 is respectively connected to the positive power supply terminal of the differential amplifier unit 131, the positive power supply terminal of the voltage comparison unit 132, and the positive power supply terminal of the reference voltage generation unit 133. The control end of the second power supply control unit 134 is connected to the logic control module 140 via the second inverter IV2, and is connected to the output end of the selector 146 in the figure. The negative power supply terminal of the differential amplifier unit 131, the negative power supply terminal of the voltage comparison unit 132, and the negative power supply terminal of the reference voltage generation unit 133 are connected to the system ground terminal VBAT-. In this embodiment, the second power supply control unit 134 includes a second switch K2, and the second switch K2 is a MOS tube, a triode, etc., and the MOS tube is, for example, a PMOS tube (using this as an example in the figure) or an NMOS tube. In addition, in other embodiments of the present application, the other end of the second power supply control unit 134 is connected to one or two of the positive power supply end of the differential amplifier unit 131, the positive power supply end of the voltage comparison unit 132, and the positive power supply end of the reference voltage generation unit 133.

[0100] In addition, in other embodiments of the present application, one end of the second power supply control unit 134 is connected to the system ground terminal VBAT-, and the other end of the second power supply control unit 134 is respectively connected to the negative power supply terminal of the differential amplifier unit 131, the negative power supply terminal of the voltage comparison unit 132, and the negative power supply terminal of the reference voltage generation unit 133. The control end of the second power supply control unit 134 is connected to the logic control module 140, and is connected to the output end of the selector 146 in the figure, and the positive power supply terminal of the differential amplifier unit 131, the positive power supply terminal of the voltage comparison unit 132, and the positive power supply terminal of the reference voltage generation unit 133 are connected to the system power supply terminal VBAT+. Here, the second power supply control unit 134 includes a second switch K2, and the second switch K2 is a MOS tube, a triode, etc., and the MOS tube is, for example, a PMOS tube, an NMOS tube (preferably an NMOS tube). In addition, in other embodiments of the present application, the other end of the second power supply control unit 134 is connected to one or two of the negative power supply end of the differential amplifier unit 131, the negative power supply end of the voltage comparison unit 132, and the negative power supply end of the reference voltage generation unit 133.

[0101] In this embodiment, the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generation unit 133 work intermittently at a first frequency in the puffing state, and the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generation unit 133 work intermittently at a second frequency in the non-puffing state. Specifically, in the puffing state, the control end of the second switch K2 receives the first pulse signal, that is, the first signal is a first pulse signal, and the first pulse signal includes an alternating on signal and a off signal. When the first pulse signal is at a high level (on signal), the second switch K2 is turned on, and the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generation unit 133 are all powered to work. When the first pulse signal is at a low level (off signal), the second switch K2 is turned off and cut off, and the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generation unit 133 are not powered and do not work. In the non-puffing state, the control end of the second switch K2 receives the second pulse signal, that is, the second signal is a second pulse signal, and the second pulse signal includes an alternating on signal and a disconnect signal. When the second pulse signal is at a high level (on signal), the second switch K2 is turned on, and the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generating unit 133 are all powered to work. When the second pulse signal is at a low level (disconnect signal), the second switch K2 is disconnected and cut off, and the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generating unit 133 are not powered and do not work.

[0102] In addition, in other embodiments of the present application, for example, as in the first embodiment, the first signal is a continuous high-level signal (on signal), and the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generating unit 133 continue to work in the puffing state, and the second switch K2 is continuously turned on. The second signal is a pulse signal, and in the non-puffing state, the differential amplifier unit 131, the voltage comparison unit 132, and the reference voltage generating unit 133 intermittently work at the second frequency, and the second switch K2 is intermittently turned on.

[0103] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0104] It should be understood that the "plurality" mentioned in this article refers to two or more. Those skilled in the art will easily think of other embodiments of the present application after considering the specification and practicing the application disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary technical means in the art that are not disclosed in the present application. The specification and examples are only regarded as exemplary, and the true scope and spirit of the present application are indicated by the following claims.

[0105] It should be noted that each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other. For the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0106] The above disclosure is only the preferred embodiment of the present application, which certainly cannot be used to limit the scope of rights of the present application. Therefore, equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. An energy-saving airflow detection circuit for connecting to a resistance bridge, characterized in that: The airflow detection circuit comprises: System power supply terminal and system ground terminal, which are used to connect to the positive terminal and negative terminal of the power supply respectively; A voltage input terminal, which is used to receive the output voltage of the resistance bridge; A resistor power supply terminal, which is used to connect to a resistor bridge; a puff detection module connected to the voltage input terminal and used to determine the state of the resistance bridge according to the voltage received by the voltage input terminal; A logic control module connected to the suction detection module; When the puff detection module determines that the resistance bridge is in a puff state, the puff detection module outputs a puff signal to the logic control module, the logic control module outputs a first signal to the puff detection module, the puff detection module works continuously or at least some units of the puff detection module work intermittently; when the puff detection module determines that the resistance bridge is in a non-puff state, the puff detection module outputs a non-puff signal to the logic control module, the logic control module outputs a second signal to the puff detection module, and at least some units of the puff detection module work intermittently; wherein, the power consumption of the puff detection module in the non-puff state is less than that in the puff state.

2. The airflow detection circuit according to claim 1, characterized in that: The puff detection module includes a differential amplifier unit and a voltage comparison unit, wherein the differential amplifier unit is connected to the voltage input end, the differential amplifier unit is also connected to one input end of the voltage comparison unit, the other input end of the voltage comparison unit is connected to a second reference voltage, and the output end of the voltage comparison unit is connected to the logic control module, wherein at least one of the differential amplifier unit and the voltage comparison unit works intermittently in a non-puff state.

3. The airflow detection circuit according to claim 2, characterized in that: The puff detection module further includes a reference voltage generating unit, the reference voltage generating unit is used to generate a second reference voltage, and the other input end of the voltage comparison unit is connected to the reference voltage generating unit; The second signal is a pulse signal and its frequency is a second frequency. In a non-puffing state, the differential amplifier unit, the voltage comparison unit, and the reference voltage generating unit all work intermittently. The first signal is a pulse signal and its frequency is a first frequency. In a puffing state, the differential amplifier unit, the voltage comparison unit, and the reference voltage generating unit all work intermittently. The first frequency is greater than the second frequency.

4. The airflow detection circuit according to claim 1, characterized in that: The logic control module is connected to the enable end of at least some units of the puff detection module, the first signal is a continuous enable signal or a pulse signal, the second signal is a pulse signal, the pulse signal includes an alternating enable signal and a disable signal, when the at least some units of the puff detection module receive the enable signal, they work, and when the at least some units of the puff detection module receive the disable signal, they do not work.

5. The airflow detection circuit according to claim 1, characterized in that: The puff detection module includes a second power supply control unit, wherein one end of the second power supply control unit is connected to the system power supply end or the system ground end, and the other end of the second power supply control unit is correspondingly connected to the positive power supply end or the negative power supply end of at least some units of the puff detection module, and the control end of the second power supply control unit is connected to the logic control module, and the second power supply control unit is used to control whether the power supply supplies power to the at least some units; wherein the second signal is a pulse signal, and the first signal is a pulse signal or a continuous on-signal, and the pulse signal includes alternating on-signals and off-signals, and when the second power supply control unit receives the first signal, the second power supply control unit is used to control the power supply to continuously supply power to the at least some units or to control the power supply to intermittently supply power to the at least some units, and when the second power supply control unit receives the second signal, the second power supply control unit is used to control the power supply to intermittently supply power to the at least some units.

6. The airflow detection circuit according to any one of claims 1 to 5, characterized in that: The logic control module includes a first pulse generating unit, a second pulse generating unit, a selector and a reference logic control unit, wherein the first pulse generating unit is used to generate a first pulse signal, and the first signal is the first pulse signal; the second pulse generating unit is used to generate a second pulse signal, and the second signal is the second pulse signal; the output end of the first pulse generating unit and the output end of the second pulse generating unit are connected to the selector, the output end of the selector is connected to the suction detection module, the selection end of the selector is connected to the reference logic control unit, and the reference logic control unit is used to receive a suction signal or a non-suction signal, when the reference logic control unit receives a suction signal, it outputs a first intermediate signal to the selector, and the selector selects the first pulse signal to output, when the reference logic control unit receives a non-suction signal, it outputs a second intermediate signal to the selector, and the selector selects the second pulse signal to output.

7. The airflow detection circuit according to any one of claims 1 to 5, characterized in that: The logic control module includes a pulse signal generating unit and a reference logic control unit, wherein the pulse signal generating unit can be used to generate a first pulse signal and a second pulse signal, the first signal is the first pulse signal, and the second signal is the second pulse signal, the output end of the pulse signal generating unit is connected to the suction detection module, and the selection end of the pulse signal generating unit is connected to the reference logic control unit, and the reference logic control unit is used to receive a suction signal or a non-suction signal, when the reference logic control unit receives a suction signal, it outputs a first intermediate signal to the pulse signal generating unit, and the pulse signal generating unit generates a first pulse signal output, and when the reference logic control unit receives a non-suction signal, it outputs a second intermediate signal to the pulse signal generating unit, and the pulse signal generating unit generates a second pulse signal output.

8. The airflow detection circuit according to any one of claims 1, 2, 4 and 5, characterized in that: The logic control module includes a pulse signal generating unit and a reference logic control unit, the pulse signal generating unit is used to generate a pulse signal, the enable end of the pulse signal generating unit is connected to the reference logic control unit, the output end of the pulse signal generating unit is connected to the puff detection module, when the reference logic control unit receives the puff signal, it outputs a disable signal to the pulse signal generating unit, the pulse signal generating unit does not work and outputs a first signal, the first signal is used to control the puff detection module to continue working; When the reference logic control unit receives a non-puffing signal, it outputs an enable signal to the pulse signal generating unit, the pulse signal generating unit works, the pulse signal generates a pulse signal, the second signal is the pulse signal, and the second signal is used to control at least part of the puffing detection module to work intermittently; or, The logic control module includes a pulse signal generating unit, a logic gate unit and a reference logic control unit, wherein the logic gate unit is respectively connected to the pulse signal generating unit and the reference logic control unit, and the logic gate unit is also connected to the puff detection module, and the reference logic control unit is used to receive a puff signal or a no-puff signal. When the reference logic control unit receives a puff signal, it outputs a first intermediate signal to the logic gate unit, and the logic gate unit outputs a first signal, and the first signal is used to control the puff detection module to work continuously; when the reference logic control unit receives a no-puff signal, it outputs a second intermediate signal to the logic gate unit, and the logic gate unit outputs a pulse signal, and the second signal is the pulse signal, and the second signal is used to control at least some units of the puff detection module to work intermittently.

9. The airflow detection circuit according to any one of claims 1 to 5, characterized in that: The airflow detection circuit includes a first power supply control unit, which is connected to the system power supply terminal and / or the system ground terminal, and is also connected to the resistor power supply terminal. The first power supply control unit is used to control whether the power supply supplies power to the resistor bridge; wherein, when at least part of the units of the suction detection module are not working, the first power supply control unit is used to control the power supply to stop supplying power to the resistor bridge.

10. The airflow detection circuit according to claim 9, characterized in that: The control end of the first power supply control unit also synchronously receives the first signal and the second signal to control whether the power supply supplies power to the resistance bridge.

11. An airflow detection component, characterized in that: include: a resistance bridge configured such that the flow of airflow causes a change in resistance, and when the resistance bridge is powered, the resistance bridge is configured to cause a change in output voltage based on the change in resistance; The airflow detection circuit according to any one of claims 1 to 10, wherein the airflow detection circuit is connected to the resistance bridge.

12. The airflow detection assembly according to claim 11, characterized in that: The resistance bridge comprises a first resistor, a second resistor, a third resistor and a fourth resistor, one of the four resistors is configured so that the flow of airflow causes a change in resistance, the first resistor is connected in series with the second resistor, the third resistor is connected in series with the fourth resistor, and a branch formed by the first resistor and the second resistor in series and a branch formed by the third resistor and the fourth resistor in series are connected in parallel; the resistance bridge also comprises a bridge power supply terminal, a bridge ground terminal, a first voltage output terminal and a second voltage output terminal, wherein a connection point where the first resistor and the third resistor are connected is connected to the bridge power supply terminal, a connection point where the second resistor and the fourth resistor are connected is connected to the bridge ground terminal, a connection point where the first resistor and the second resistor are connected is connected to the first voltage output terminal, and a connection point where the third resistor and the fourth resistor are connected is connected to the second voltage output terminal; the number of voltage input terminals of the airflow detection circuit is two, and the two voltage input terminals are correspondingly connected to the first voltage output terminal and the second voltage output terminal; The number of the resistance power supply terminal of the airflow detection circuit is one, the resistance power supply terminal is connected to one of the bridge power supply terminal and the bridge ground terminal, and the other of the bridge power supply terminal and the bridge ground terminal is correspondingly connected to the system ground terminal or the system power supply terminal; or, The number of the resistance power supply ends of the airflow detection circuit is two, and the two resistance power supply ends are correspondingly connected to the bridge power supply end and the bridge ground end.

13. An electronic atomization device, characterized in that: include: Power supply and heating elements; The airflow detection component as described in claim 11 or 12 or the airflow detection circuit as described in any one of claims 1-10, the airflow detection circuit also includes a power switch, the control end of the power switch is connected to the logic control module of the airflow detection circuit, one end of the power switch is connected to the power supply through the system power supply end or the system ground end, the other end of the power switch is connected to the heating element, and the other end of the heating element is connected to the power supply, when the suction detection module of the airflow detection circuit determines that the resistance bridge is in the suction state, the suction detection module controls the power switch to be normally turned on or intermittently turned on, and when the suction detection module determines that the resistance bridge is in the non-suction state, the suction detection module controls the power switch to remain disconnected.

14. An energy-saving airflow detection chip, used for connecting to a resistance bridge, characterized in that: include: System power pin and system ground pin, which are used to connect to the positive and negative terminals of the power supply; A voltage input pin for receiving the output voltage of the resistance bridge; A resistor power supply pin, which is used to connect to a resistor bridge; a puff detection module connected to the voltage input pin and used to determine the state of the resistance bridge according to the voltage received by the voltage input pin; A logic control module connected to the suction detection module; When the puff detection module determines that the resistance bridge is in a puff state, the puff detection module outputs a puff signal to the logic control module, the logic control module outputs a first signal to the puff detection module, the puff detection module works continuously or at least some units of the puff detection module work intermittently; when the puff detection module determines that the resistance bridge is in a non-puff state, the puff detection module outputs a non-puff signal to the logic control module, the logic control module outputs a second signal to the puff detection module, and at least some units of the puff detection module work intermittently; wherein, the power consumption of the puff detection module in the non-puff state is less than that in the puff state.

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