A heating element control circuit and an atomization device

Abstract

The application provides a heating element control circuit and an atomization device, and relates to the technical field of electronic atomization. The heating element control circuit comprises a controller, a first switch module, a second switch module and a third switch module. The first end of the controller can control the first switch module and the second switch module to be simultaneously turned on or turned off. The second switch module is used for controlling the first heating element to be powered on or powered off. The third switch module is used for controlling the second heating element to be powered on or powered off. When the first switch module and the second switch module are turned on, the third switch module is configured to be turned off, so that the first heating element is powered on and generates heat. When the first switch module and the second switch module are turned off, the third switch module is configured to be turned on, so that the second heating element is powered on and generates heat. Thus, the first heating element and the second heating element can be alternately heated, and the over-temperature hidden danger caused by long-time continuous heating of the heating element can be avoided.

Description

Technical Field

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

[0002] In related technologies, the atomizing device has two heating elements for heating the atomizing matrix. The controller of the atomizing device sends two pulse width modulation (PWM) signals. One PWM signal controls the switching device of one heating element to turn on and off, and the other PWM signal controls the switching device of the other heating element to turn on and off, so as to realize that the two heating elements heat up in turn.

[0003] However, due to the abnormal timing of the two PWM signals, the two heating elements heat up continuously at the same time, which can easily cause safety hazards by continuously heating the atomizing matrix. Utility Model Content

[0004] This application aims to provide a heating element control circuit and an atomizing device, which at least solves the problem in the related art where the timing abnormality of the two PWM signals of the atomizing device causes the two heating elements to heat up continuously at the same time, thus continuously heating the atomizing matrix and easily causing safety hazards.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] This application provides a heating element control circuit, including: a controller, a first switch module, a second switch module, and a third switch module; a first terminal of the controller is electrically connected to the first switch module and the second switch module respectively, and the first terminal of the controller is used to control the first switch module and the second switch module to be simultaneously turned on or simultaneously turned off; the first switch module is electrically connected to the third switch module; the second switch module is electrically connected to the first heating element, and the second switch module is used to control the first heating element to be energized or de-energized; the third switch module is electrically connected to the second heating element, and the third switch module is used to control the second heating element to be energized or de-energized; wherein, when the first switch module and the second switch module are turned on, the third switch module is configured to be turned off, so that the first heating element is energized; when the first switch module and the second switch module are turned off, the third switch module is configured to be turned on, so that the second heating element is energized.

[0007] In some embodiments, the first switch module includes a first switch device and a first resistor; a first end of the first resistor is electrically connected to a first end of the controller, and a second end of the first resistor is electrically connected to a control end of the first switch device; a first end of the first switch device is electrically connected to a control end of the third switch module, and a second end of the first switch device is grounded.

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

[0009] In some embodiments, the third switching module includes a fourth resistor and a third switching device; the first end of the fourth resistor is electrically connected to the control terminal of the third switching device, and the second end of the fourth resistor is grounded; the first end of the third switching device is electrically connected to the second end of the second heating element, and the second end of the third switching device is grounded; the control terminal of the third switching device is electrically connected to the positive terminal of the power supply and the first end of the first switching module, respectively; the first end of the second heating element is electrically connected to the positive terminal of the power supply.

[0010] In some embodiments, the heating element control circuit further includes a fourth switching module; the fourth switching module is electrically connected to the second terminal of the controller, the first switching module, and the third switching module, respectively, and the fourth switching module is used to be electrically connected to a power supply; wherein, the second terminal of the controller is used to control the fourth switching module to be turned on or off; when the fourth switching module is turned on and the first switching module is turned off, the third switching module is turned on, and when the fourth switching module is turned off and the first switching module is turned on, the third switching module is turned off.

[0011] In some embodiments, the fourth switching module includes a fifth resistor, a sixth resistor, and a fourth switching device; the first end of the fifth resistor is electrically connected to the positive terminal of the power supply, and the second end of the fifth resistor is electrically connected to the control terminal of the fourth switching device; the first end of the fourth switching device is electrically connected to the positive terminal of the power supply, the second end of the fourth switching device is electrically connected to the first end of the sixth resistor, and the control terminal of the fourth switching device is electrically connected to the second end of the controller; the second end of the sixth resistor is electrically connected to the first end of the first switching module and the control terminal of the third switching module, respectively.

[0012] In some embodiments, the heating element control circuit further includes an overcurrent protection module; the overcurrent protection module is electrically connected to the power supply and the controller respectively, and is used to electrically connect to the first heating element and the second heating element respectively, and control the controller, the first heating element and the second heating element to disconnect the power when the current output by the power supply is greater than the current threshold.

[0013] In some embodiments, the overcurrent protection module includes a fifth switching device, a seventh resistor, and a power protection chip; the first terminal of the fifth switching device is electrically connected to the ground terminal of the controller, the second terminal of the second switching module, and the second terminal of the third switching module, respectively; the second terminal of the fifth switching device is electrically connected to the first terminal of the seventh resistor; the control terminal of the fifth switching device is electrically connected to the first terminal of the power protection chip; the second terminal of the seventh resistor is electrically connected to the negative terminal of the power supply, and the seventh resistor is used to collect the current output by the power supply; the second terminal of the power protection chip is electrically connected to the first terminal of the seventh resistor; wherein, the power protection chip is used to obtain the real-time voltage value across the seventh resistor, and when the real-time voltage value is greater than a voltage threshold, it controls the fifth switching device to disconnect.

[0014] In some embodiments, the overcurrent protection module further includes a sixth switching device; the first terminal of the sixth switching device is electrically connected to the ground terminal of the controller, the second terminal of the second switching module, and the second terminal of the third switching module, respectively; the second terminal of the sixth switching device is electrically connected to the first terminal of the fifth switching device; and the control terminal of the sixth switching device is electrically connected to the third terminal of the power protection chip; wherein, the power protection chip is configured to control the sixth switching device to disconnect when the real-time voltage value is greater than the voltage threshold.

[0015] This application also provides an atomizing device, including the heating element control circuit as described above.

[0016] In this embodiment, since the first terminal of the controller can control the first switch module and the second switch module to be turned on or off simultaneously, the second switch module is used to control the first heating element to be powered on or off, and the third switch module is used to control the second heating element to be powered on or off. When the first switch module and the second switch module are turned on, the third switch module is configured to be off, so that the first heating element is powered on and heats up. When the first switch module and the second switch module are off, the third switch module is configured to be turned on, so that the second heating element is powered on and heats up. Thus, the first heating element and the second heating element can be heated in turn, and there is no problem that the two heating elements are heated up at the same time due to the timing abnormality of the two PWM signals issued by the controller, thus avoiding the overheating damage of the heating element due to the long continuous heating time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a heating element control circuit provided in an embodiment of this application;

[0019] Figure 2 This is a schematic diagram of a heating element control circuit provided in an embodiment of this application;

[0020] Figure 3 This is a schematic diagram of an overcurrent protection module provided in an embodiment of this application;

[0021] Figure 4 This is a schematic diagram of a voltage change curve over time provided in an embodiment of this application.

[0022] Figure label:

[0023] 10 - First switch module; 20 - Second switch module; 30 - Third switch module; 40 - Fourth switch module; 50 - Controller; 501 - First terminal of the controller; 502 - Second terminal of the controller; 503 - Third terminal of the controller; 504 - Fourth terminal of the controller; 505 - Fifth terminal of the controller; 60 - Power supply; 70 - Overcurrent protection module; 71 - Power protection chip; 711 - First terminal of the power protection chip; 712 - Second terminal of the power protection chip; 713 - Third terminal of the power protection chip; 714 - Fourth terminal of the power protection chip; 715 - Fifth terminal of the power protection chip; 716 - Sixth terminal of the power protection chip; RT1 - First heating element; RT2 - Second heating element; Q1 - First switching device; Q2 - Second switching device; Q3 - Third switching device; Q4 - Fourth switching device; Q5 - Fifth switching device; Q6 - Sixth switching device; R1 - First resistor; R2 - Second resistor; R3 - Third resistor; R4 - Fourth resistor; R5 - Fifth resistor; R6 - Sixth resistor; R7 - Seventh resistor; R8 - Eighth resistor; R9 - Ninth resistor; C1 - First capacitor; C2 - Second capacitor. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0026] Reference Figure 1This application provides a heating element control circuit, including: a controller 50, a first switch module 10, a second switch module 20, and a third switch module 30; a first terminal 501 of the controller 50 is electrically connected to the first switch module 10 and the second switch module 20 respectively, and the first terminal 501 of the controller 50 is used to control the first switch module 10 and the second switch module 20 to be simultaneously turned on or off; the first switch module 10 is electrically connected to the third switch module 30; the second switch module 20 is electrically connected to the first heating element RT1, and the second switch module 20 is used to control the first heating element RT1 to be energized or de-energized; the third switch module 30 is electrically connected to the second heating element RT2, and the third switch module 30 is used to control the second heating element RT2 to be energized or de-energized; wherein, when the first switch module 10 and the second switch module 20 are turned on, the third switch module 30 is configured to be turned off, so that the first heating element RT1 is energized; when the first switch module 10 and the second switch module 20 are turned off, the third switch module 30 is configured to be turned on, so that the second heating element RT2 is energized.

[0027] In some embodiments, the second switch module 20 is used to energize the first heating element RT1 when it is on, and to de-energize the first heating element RT1 when it is off; the third switch module 30 is used to de-energize the second heating element RT2 when the first switch module 10 is on, and to energize the second heating element RT2 when the first switch module 10 is off.

[0028] In some embodiments, the first heating element RT1, the second switch module 20, and the power supply 60 constitute a first power supply circuit. When the second switch module 20 is turned on, the first power supply circuit is connected, and the first heating element RT1 is powered on and heats up. When the second switch module 20 is turned off, the first power supply circuit is disconnected, and the first heating element RT1 is de-energized and stops heating up.

[0029] In some embodiments, the second heating element RT2, the third switch module 30, and the power supply 60 constitute a second power supply circuit. When the third switch module 30 is turned on, the second power supply circuit is connected, and the second heating element RT2 is powered on and heats up. When the third switch module 30 is turned off, the second power supply circuit is disconnected, and the second heating element RT2 is de-energized and stops heating up.

[0030] In some embodiments, the first terminal 501 of the controller 50 is used to output a PWM signal, which controls the first switch module 10 and the second switch module 20 to be turned on or off simultaneously.

[0031] In some embodiments, the first heating element RT1 is a heating element of the atomizing device, the second heating element RT2 is another heating element of the atomizing device, and the controller 50 is the controller 50 of the atomizing device.

[0032] In some embodiments, when the first terminal 501 of the controller 50 outputs a first level, the first switch module 10 and the second switch module 20 are simultaneously turned on; when the first terminal 501 of the controller 50 outputs a second level, the first switch module 10 and the second switch module 20 are simultaneously turned off.

[0033] In some embodiments, when the atomizing device detects the user's inhalation action, the first terminal 501 of the controller 50 outputs a PWM signal.

[0034] In some embodiments, the first level is a high level; the second level is a low level.

[0035] In some embodiments, the controller 50 may be a microcontroller unit (MCU) or other types of chips.

[0036] In some embodiments, the first heating element RT1 may be a heating wire.

[0037] In some embodiments, the second heating element RT2 may be a heating wire.

[0038] In this embodiment, since the first terminal 501 of the controller 50 can control the first switch module 10 and the second switch module 20 to be turned on or off simultaneously, the second switch module 20 is used to control the first heating element RT1 to be energized or de-energized, and the third switch module 30 is used to control the second heating element RT2 to be energized or de-energized, when the first switch module 10 and the second switch module 20 are turned on, the third switch module 30 is configured to be turned off, so that the first heating element RT1 is energized and heats up; and when the first switch module 10 and the second switch module 20 are turned off, the third switch module 30 is configured to be turned on, so that the second heating element RT2 is energized and heats up. Thus, the first heating element RT1 and the second heating element RT2 can be heated in turn, and there is no problem that the two heating elements are heated up at the same time due to the timing abnormality of the two PWM signals issued by the controller 50, thus avoiding the overheating damage of the heating elements due to the long continuous heating time.

[0039] Reference Figure 2In some embodiments, the first switch module 10 includes a first switch device Q1 and a first resistor R1; the first end of the first resistor R1 is electrically connected to the first end 501 of the controller 50, and the second end of the first resistor R1 is electrically connected to the control end of the first switch device Q1; the first end of the first switch device Q1 is electrically connected to the control end of the third switch module 30, and the second end of the first switch device Q1 is grounded.

[0040] In some embodiments, the first switching device Q1 may be a MOS transistor (Metal-Oxide-Semiconductor Field-Effect Transistor), a bipolar junction transistor (BJT), or the like. For example, the first switching device Q1 may be an NPN bipolar junction transistor (NPN BJT). The NPN BJT is composed of three semiconductors, including two N-type (Negative Electricity) semiconductors (electronic semiconductors) and one P-type (Positive Electricity) semiconductor (hole semiconductor). The P-type semiconductor is in the middle, and the two N-type semiconductors are on both sides.

[0041] In this embodiment, the first resistor R1 is a current-limiting resistor. When the first switching device Q1 is turned on, the third switching module 30 is turned off, and when the first switching device Q1 is turned off, the third switching module 30 is turned on.

[0042] In some embodiments, the second switch module 20 includes a second resistor R2, a third resistor R3, and a second switch device Q2; the first end of the second resistor R2 is electrically connected to the first end 501 of the controller 50, and the second end of the second resistor R2 is electrically connected to the first end of the third resistor R3 and the control end of the second switch device Q2; the first end of the third resistor R3 is electrically connected to the control end of the second switch device Q2, and the second end of the third resistor R3 is grounded; the first end of the second switch device Q2 is electrically connected to the second end of the first heating element RT1, and the second end of the second switch device Q2 is grounded; the first end of the first heating element RT1 is electrically connected to the positive terminal of the power supply 60.

[0043] In some embodiments, the type of the second switching device Q2 includes a MOSFET, a transistor, etc. For example, the type of the second switching device Q2 is an NMOS transistor, where NMOS is a negative channel metal-oxide-semiconductor.

[0044] In this embodiment, the second resistor R2 is a current-limiting resistor, and the third resistor R3 is a bias resistor; the first heating element RT1, the second switching device Q2, and the power supply 60 form a first power supply circuit. When the second switching device Q2 is turned on, the first power supply circuit is connected, and the first heating element RT1 is powered on and heats up; when the second switching device Q2 is turned off, the first power supply circuit is disconnected, and the first heating element RT1 is de-energized and stops heating up.

[0045] In some embodiments, the third switch module 30 includes a fourth resistor R4 and a third switch device Q3; the first end of the fourth resistor R4 is electrically connected to the control terminal of the third switch device Q3, and the second end of the fourth resistor R4 is grounded; the first end of the third switch device Q3 is electrically connected to the second end of the second heating element RT2, and the second end of the third switch device Q3 is grounded; the control terminal of the third switch device Q3 is electrically connected to the positive terminal of the power supply 60 and the first terminal of the first switch module 10, respectively; the first end of the second heating element RT2 is electrically connected to the positive terminal of the power supply 60.

[0046] In some embodiments, the type of the third switching device Q3 includes a MOSFET, a transistor, etc., for example, the type of the third switching device Q3 is an NMOS transistor.

[0047] In this embodiment, the fourth resistor R4 is a bias resistor; the second heating element RT2, the third switching device Q3, and the power supply 60 form a second power supply circuit. When the third switching device Q3 is turned on, the second power supply circuit is connected, and the second heating element RT2 is powered on and heats up; when the third switching device Q3 is turned off, the second power supply circuit is disconnected, and the second heating element RT2 is de-energized and stops heating up.

[0048] In some embodiments, the heating element control circuit further includes a fourth switch module 40; the fourth switch module 40 is electrically connected to the second terminal 502 of the controller 50, the first switch module 10 and the third switch module 30 respectively, and the fourth switch module 40 is used to be electrically connected to the power supply 60; wherein, the second terminal 502 of the controller 50 is used to control the fourth switch module 40 to be turned on or off; when the fourth switch module 40 is turned on and the first switch module 10 is turned off, the third switch module 30 is turned on, and when the fourth switch module 40 is turned off and the first switch module 10 is turned on, the third switch module 30 is turned off.

[0049] In some embodiments, when the second terminal 502 of the controller 50 outputs a first level, the fourth switch module 40 is turned on; when the second terminal 502 of the controller 50 outputs a second level, the fourth switch module 40 is turned off.

[0050] In some embodiments, when the atomizing device detects the user's inhalation action, the second terminal 502 of the controller 50 outputs a first level.

[0051] In some embodiments, the power source 60 is a power source 60 in the atomizing device, for example, the power source 60 is a battery in the atomizing device.

[0052] In some embodiments, the negative terminal of power supply 60 is grounded.

[0053] In this embodiment, the fourth switch module 40 is turned on or off by the second terminal 502 of the controller 50. When the fourth switch module 40 is turned on and the first switch module 10 is turned off, the third switch module 30 is turned on, so that the second heating element RT2 is powered on. When the fourth switch module 40 is turned off and the first switch module 10 is turned on, the third switch module 30 is turned off, so that the second heating element RT2 is de-powered.

[0054] In some embodiments, the fourth switch module 40 includes a fifth resistor R5, a sixth resistor R6, and a fourth switch device Q4; the first end of the fifth resistor R5 is electrically connected to the positive terminal of the power supply 60, and the second end of the fifth resistor R5 is electrically connected to the control terminal of the fourth switch device Q4; the first end of the fourth switch device Q4 is electrically connected to the positive terminal of the power supply 60, the second end of the fourth switch device Q4 is electrically connected to the first end of the sixth resistor R6, and the control terminal of the fourth switch device Q4 is electrically connected to the second terminal 502 of the controller 50; the second end of the sixth resistor R6 is electrically connected to the first terminal of the first switch module 10 and the control terminal of the third switch module 30, respectively.

[0055] In some embodiments, the fourth switching device Q4 may be a MOSFET, a transistor, or, for example, an NMOS transistor.

[0056] In this embodiment, the fifth resistor R5 and the sixth resistor R6 are both pull-up resistors; the fourth switching device Q4 is turned on or off by the second terminal 502 of the controller 50. When the fourth switching device Q4 is on and the first switching device Q1 is off, the third switching device Q3 is on, so that the second heating element RT2 is powered on. When the fourth switching device Q4 is off and the first switching device Q1 is on, the third switching device Q3 is off, so that the second heating element RT2 is de-powered.

[0057] In some embodiments, the heating element control circuit further includes an overcurrent protection module 70; the overcurrent protection module 70 is electrically connected to the power supply 60 and the controller 50 respectively, and the overcurrent protection module 70 is used to electrically connect to the first heating element RT1 and the second heating element RT2 respectively, and control the controller 50, the first heating element RT1 and the second heating element RT2 to disconnect the power when the current output by the power supply 60 is greater than the current threshold.

[0058] In some embodiments, the first heating element RT1, the second switch module 20, the overcurrent protection module 70, and the power supply 60 constitute a first power supply circuit. When the second switch module 20 is turned on and the overcurrent protection module 70 is turned on, the first power supply circuit is connected, and the first heating element RT1 is powered on and heats up. When the second switch module 20 is turned off or the overcurrent protection module 70 is turned off, the first power supply circuit is disconnected, and the first heating element RT1 is de-energized and stops heating up.

[0059] In some embodiments, the second heating element RT2, the third switch module 30, the overcurrent protection module 70, and the power supply 60 constitute a second power supply circuit. When the third switch module 30 is turned on and the overcurrent protection module 70 is turned on, the second power supply circuit is connected, and the second heating element RT2 is powered on and heats up. When the third switch module 30 is turned off or the overcurrent protection module 70 is turned off, the second power supply circuit is disconnected, and the second heating element RT2 is de-energized and stops heating up.

[0060] In this embodiment, when the second switching device Q2 is damaged and abnormally conducts (i.e., short-circuit) or the third switching device Q3 is damaged and abnormally conducts, the first heating element RT1 and the second heating element RT2 are simultaneously powered on and heated. At this time, the current output by the power supply 60 is greater than the current threshold. When the current output by the power supply 60 is greater than the current threshold, the overcurrent protection module 70 controls the controller 50, the first heating element RT1 and the second heating element RT2 to be powered off, so as to avoid the first heating element RT1 or the second heating element RT2 being damaged due to overheating caused by the simultaneous power-on heating of the first heating element RT1 and the second heating element RT2.

[0061] In the event of a short circuit due to a faulty controller 50, if the current output by the power supply 60 exceeds the current threshold, the overcurrent protection module 70 will control the controller 50, the first heating element RT1, and the second heating element RT2 to disconnect the power supply 60 to protect it from overcurrent damage.

[0062] In some embodiments, the heating element control circuit further includes a first capacitor C1, and the grounding terminal of the controller 50 includes a fourth terminal 504 and a fifth terminal 505 of the controller 50; the third terminal 503 of the controller 50 is electrically connected to the positive terminal of the power supply 60 and the first terminal of the first capacitor C1, respectively, and the second terminal of the first capacitor C1 is grounded; the first capacitor C1 is a filter capacitor.

[0063] Reference Figure 3In some embodiments, the overcurrent protection module 70 includes a fifth switching device Q5, a seventh resistor R7, and a power protection chip 71. The first terminal of the fifth switching device Q5 is electrically connected to the ground terminal of the controller 50, the second terminal of the second switching module 20, and the second terminal of the third switching module 30, respectively. The second terminal of the fifth switching device Q5 is electrically connected to the first terminal of the seventh resistor R7. The control terminal of the fifth switching device Q5 is electrically connected to the first terminal 711 of the power protection chip 71. The second terminal of the seventh resistor R7 is electrically connected to the negative terminal of the power supply 60 and is used to collect the current output by the power supply 60. The second terminal 712 of the power protection chip 71 is electrically connected to the first terminal of the seventh resistor R7. The power protection chip 71 is used to obtain the real-time voltage value across the seventh resistor R7 and, if the real-time voltage value is greater than the voltage threshold, controls the fifth switching device Q5 to disconnect.

[0064] In some embodiments, the first heating element RT1, the second switching device Q2, the fifth switching device Q5, the seventh resistor R7, and the power supply 60 constitute a first power supply circuit. When the second switching device Q2 is turned on and the fifth switching device Q5 is turned on, the first power supply circuit is connected, and the first heating element RT1 is powered on and heats up. When the second switching device Q2 is turned off or the fifth switching device Q5 is turned off, the first power supply circuit is disconnected, and the first heating element RT1 is de-energized and stops heating up.

[0065] In some embodiments, the second heating element RT2, the third switching device Q3, the fifth switching device Q5, the seventh resistor R7, and the power supply 60 constitute a second power supply circuit. When the third switching device Q3 is turned on and the fifth switching device Q5 is turned on, the second power supply circuit is connected, and the second heating element RT2 is powered on and heats up. When the third switching device Q3 is turned off or the fifth switching device Q5 is turned off, the second power supply circuit is disconnected, and the second heating element RT2 is de-energized and stops heating up.

[0066] In some embodiments, the fifth switching device Q5 may be a MOSFET, a transistor, or, for example, an NMOS transistor.

[0067] In this embodiment, the seventh resistor R7 is used to collect the current output by the power supply 60; the real-time voltage value across the seventh resistor R7 is obtained by the power protection chip 71. If the real-time voltage value is greater than the voltage threshold, it indicates that the current output by the power supply 60 is greater than the current threshold. The power protection chip 71 controls the fifth switching device Q5 to open, thereby de-energizing the controller 50, the first heating element RT1, and the second heating element RT2.

[0068] In some embodiments, the overcurrent protection module 70 further includes a sixth switching device Q6; the first terminal of the sixth switching device Q6 is electrically connected to the ground terminal of the controller 50, the second terminal of the second switching module 20, and the second terminal of the third switching module 30, respectively; the second terminal of the sixth switching device Q6 is electrically connected to the first terminal of the fifth switching device Q5; and the control terminal of the sixth switching device Q6 is electrically connected to the third terminal 713 of the power protection chip 71; wherein, the power protection chip 71 is configured to control the sixth switching device Q6 to disconnect when the real-time voltage value is greater than the voltage threshold.

[0069] In some embodiments, the type of the sixth switching device Q6 includes a MOSFET, a transistor, etc., for example, the type of the sixth switching device Q6 is an NMOS transistor.

[0070] In some embodiments, the first heating element RT1, the second switching device Q2, the sixth switching device Q6, the fifth switching device Q5, the seventh resistor R7, and the power supply 60 constitute a first power supply circuit. When the second switching device Q2 is on, the fifth switching device Q5 is on, and the sixth switching device Q6 is on, the first power supply circuit is connected, and the first heating element RT1 is powered on and heats up. When the second switching device Q2 is off, or the fifth switching device Q5 is off, or the sixth switching device Q6 is off, the first power supply circuit is disconnected, and the first heating element RT1 is de-energized and stops heating up.

[0071] In some embodiments, the second heating element RT2, the third switching device Q3, the sixth switching device Q6, the fifth switching device Q5, the seventh resistor R7, and the power supply 60 constitute a second power supply circuit. When the third switching device Q3 is on, the fifth switching device Q5 is on, and the sixth switching device Q6 is on, the second power supply circuit is connected, and the second heating element RT2 is energized and heats up. When the third switching device Q3 is off, or the fifth switching device Q5 is off, or the sixth switching device Q6 is off, the second power supply circuit is disconnected, and the second heating element RT2 is de-energized and stops heating.

[0072] In this embodiment, the sixth switching device Q6 and the fifth switching device Q5 are redundant. When the real-time voltage value is greater than the voltage threshold, it indicates that the current output by the power supply 60 is greater than the current threshold. The power protection chip 71 controls the sixth switching device Q6 to disconnect, thereby de-energizing the controller 50, the first heating element RT1, and the second heating element RT2.

[0073] In some embodiments, the overcurrent protection module 70 further includes an eighth resistor R8, a ninth resistor R9, and a second capacitor C2. The fourth terminal 714 of the power protection chip 71 is electrically connected to the second terminal of the eighth resistor R8 and the first terminal of the second capacitor C2, respectively. The fifth terminal 715 of the power protection chip 71 is electrically connected to the negative terminal of the power supply 60, and the sixth terminal 716 of the power protection chip 71 is electrically connected to the first terminal of the ninth resistor R9. The first terminal of the eighth resistor R8 is electrically connected to the positive terminal of the power supply 60, and the second terminal of the second capacitor C2 is electrically connected to the negative terminal of the power supply 60. The fourth terminal 714 of the power protection chip 71 is the power supply 60 terminal of the power protection chip 71, the fifth terminal 715 of the power protection chip 71 is the ground terminal of the power protection chip 71, and the sixth terminal 716 of the power protection chip 71 is used to detect whether the charger is connected. The eighth resistor R8 and the ninth resistor R9 are both current-limiting resistors, and the second capacitor C2 is a filter capacitor.

[0074] Reference Figure 4 In some embodiments, in a coordinate system with voltage U as the vertical axis and time t as the horizontal axis, curve X1 is the voltage curve of the signal input to the control terminal of the second switching device Q2, and curve X2 is the voltage curve of the signal input to the control terminal of the third switching device Q3.

[0075] In some embodiments, the resistance value of the first heating element RT1 and the resistance value of the second heating element RT2 are both 1.1 ohms, the voltage range of the power supply 60 is 3.5 volts to 4.2 volts, the discharge overcurrent protection range of the power protection chip 71 is 4.6 amps to 5.9 amps, and the current threshold is 5.9 amps. That is, when the current output by the power supply 60 is greater than 5.9 amps, the power protection chip 71 controls the controller 50, the first heating element RT1 and the second heating element RT2 to disconnect from the power supply.

[0076] When the controller 50, the first heating element RT1, and the second heating element RT2 are operating normally, the maximum current output by the power supply 60 is: IMAX1 = 4.2 volts / 1.1 ohms = 3.82 amps. Since 3.82 amps is less than 4.6 amps, the power protection chip 71 keeps the controller 50, the first heating element RT1, and the second heating element RT2 operating normally. When the second switching device Q2 or the third switching device Q3 is short-circuited, there is a period of time when the second switching device Q2 and the third switching device Q3 are simultaneously turned on, that is, there is a period of time when the first heating element RT1 and the second heating element RT2 are simultaneously powered on and heating. The maximum current output by the power supply 60 is: IMAX2 = 4.2 volts / (1 / (1 / 1.1 ohms + 1 / 1.1 ohms)) = 7.64 amps. Since 7.64 amps is greater than 5.9 amps, the power protection chip 71 controls the controller 50, the first heating element RT1, and the second heating element RT2 to be de-energized when the current output by the power supply 60 is greater than 5.9 amps.

[0077] In some embodiments, the heating element control circuit includes a controller 50, a first switch module 10, a second switch module 20, a third switch module 30, and a fourth switch module 40; the first switch module 10 includes a first switch device Q1 and a first resistor R1; the second switch module 20 includes a second resistor R2, a third resistor R3, and a second switch device Q2; the third switch module 30 includes a fourth resistor R4 and a third switch device Q3; and the fourth switch module 40 includes a fifth resistor R5, a sixth resistor R6, and a fourth switch device Q4.

[0078] The first end of the first resistor R1 is electrically connected to the first end 501 of the controller 50, and the second end of the first resistor R1 is electrically connected to the control end of the first switching device Q1; the first end of the first switching device Q1 is electrically connected to the control end of the third switching device Q3, and the second end of the first switching device Q1 is grounded; the first end of the second resistor R2 is electrically connected to the first end 501 of the controller 50, and the second end of the second resistor R2 is electrically connected to the first end of the third resistor R3 and the control end of the second switching device Q2; the first end of the third resistor R3 is electrically connected to the control end of the second switching device Q2, and the second end of the third resistor R3 is grounded; the first end of the second switching device Q2 is electrically connected to the second end of the first heating element RT1, and the second end of the second switching device Q2 is grounded; the first end of the first heating element RT1 is electrically connected to the positive terminal of the power supply 60.

[0079] The first end of the fourth resistor R4 is electrically connected to the control terminal of the third switching device Q3, and the second end of the fourth resistor R4 is grounded; the first end of the third switching device Q3 is electrically connected to the second end of the second heating element RT2, and the second end of the third switching device Q3 is grounded; the control terminal of the third switching device Q3 is electrically connected to the positive terminal of the power supply 60 and the first end of the first switching device Q1, respectively; the first end of the second heating element RT2 is electrically connected to the positive terminal of the power supply 60; the first end of the fifth resistor R5 is electrically connected to the positive terminal of the power supply 60, and the second end of the fifth resistor R5 is electrically connected to the control terminal of the fourth switching device Q4; the first end of the fourth switching device Q4 is electrically connected to the positive terminal of the power supply 60, and the second end of the fourth switching device Q4 is electrically connected to the first end of the sixth resistor R6, and the control terminal of the fourth switching device Q4 is electrically connected to the second terminal 502 of the controller 50; the second end of the sixth resistor R6 is electrically connected to the first end of the first switching device Q1 and the control terminal of the third switching module 30, respectively.

[0080] In other embodiments, the heating element control circuit includes a controller 50, a first switch module 10, a second switch module 20, a third switch module 30, a fourth switch module 40, and an overcurrent protection module 70; the first switch module 10 includes a first switch device Q1 and a first resistor R1; the second switch module 20 includes a second resistor R2, a third resistor R3, and a second switch device Q2; the third switch module 30 includes a fourth resistor R4 and a third switch device Q3; the fourth switch module 40 includes a fifth resistor R5, a sixth resistor R6, and a fourth switch device Q4; the overcurrent protection module 70 includes a fifth switch device Q5, a sixth switch device Q6, a seventh resistor R7, and a power protection chip 71.

[0081] The first end of the first resistor R1 is electrically connected to the first end 501 of the controller 50, and the second end of the first resistor R1 is electrically connected to the control end of the first switching device Q1; the first end of the first switching device Q1 is electrically connected to the control end of the third switching device Q3, and the second end of the first switching device Q1 is electrically connected to the first end of the sixth switching device Q6; the first end of the second resistor R2 is electrically connected to the first end 501 of the controller 50, and the second end of the second resistor R2 is electrically connected to the first end of the third resistor R3 and the control end of the second switching device Q2; the first end of the third resistor R3 is electrically connected to the control end of the second switching device Q2, and the second end of the third resistor R3 is electrically connected to the first end of the sixth switching device Q6; the first end of the second switching device Q2 is electrically connected to the second end of the first heating element RT1, and the second end of the second switching device Q2 is electrically connected to the first end of the sixth switching device Q6; the first end of the first heating element RT1 is electrically connected to the positive terminal of the power supply 60.

[0082] The first end of the fourth resistor R4 is electrically connected to the control terminal of the third switching device Q3, and the second end of the fourth resistor R4 is electrically connected to the first end of the sixth switching device Q6; the first end of the third switching device Q3 is electrically connected to the second end of the second heating element RT2, and the second end of the third switching device Q3 is electrically connected to the first end of the sixth switching device Q6; the control terminal of the third switching device Q3 is electrically connected to the positive terminal of the power supply 60 and the first end of the first switching device Q1, respectively; the first end of the second heating element RT2 is electrically connected to the positive terminal of the power supply 60; the first end of the fifth resistor R5 is electrically connected to the positive terminal of the power supply 60, and the second end of the fifth resistor R5 is electrically connected to the control terminal of the fourth switching device Q4; the first end of the fourth switching device Q4 is electrically connected to the positive terminal of the power supply 60, and the second end of the fourth switching device Q4 is electrically connected to the first end of the sixth resistor R6; the control terminal of the fourth switching device Q4 is electrically connected to the second terminal 502 of the controller 50; the second end of the sixth resistor R6 is electrically connected to the first end of the first switching device Q1 and the control terminal of the third switching module 30, respectively.

[0083] The second terminal of the seventh resistor R7 is electrically connected to the negative terminal of the power supply 60; the second terminal 712 of the power protection chip 71 is electrically connected to the first terminal of the seventh resistor R7; the second terminal of the sixth switching device Q6 is electrically connected to the first terminal of the fifth switching device Q5, and the control terminal of the sixth switching device Q6 is electrically connected to the third terminal 713 of the power protection chip 71; the second terminal of the fifth switching device Q5 is electrically connected to the first terminal of the seventh resistor R7, and the control terminal of the fifth switching device Q5 is electrically connected to the first terminal 711 of the power protection chip 71.

[0084] This application also provides an atomizing device, including the heating element control circuit as described above.

[0085] The specific implementation of the heating element control circuit in the atomizing device is similar to that described above, and will not be repeated here.

[0086] In summary, in this embodiment, since the first terminal 501 of the controller 50 can control the first switch module 10 and the second switch module 20 to be simultaneously turned on or off, the second switch module 20 is used to control the first heating element RT1 to be energized or de-energized, and the third switch module 30 is used to control the second heating element RT2 to be energized or de-energized, when the first switch module 10 and the second switch module 20 are turned on, the third switch module 30 is configured to be turned off, so that the first heating element RT1 is energized and heats up; and when the first switch module 10 and the second switch module 20 are turned off, the third switch module 30 is configured to be turned on, so that the second heating element RT2 is energized and heats up. Thus, the first heating element RT1 and the second heating element RT2 can be heated in turn, and there is no problem that the two heating elements will be continuously heated at the same time due to the timing abnormality of the two PWM signals issued by the controller 50. This avoids the heating elements from continuously heating the atomizing matrix, causing atomization abnormality and safety hazards, and also avoids the heating elements from being easily damaged by overheating due to long heating time.

[0087] It should be noted that, without further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be pointed out that the scope of the methods and apparatus in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0088] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A heating element control circuit, characterized in that, include: The controller (50), the first switch module (10), the second switch module (20) and the third switch module (30); The first end (501) of the controller (50) is electrically connected to the first switch module (10) and the second switch module (20) respectively. The first end (501) of the controller (50) is used to control the first switch module (10) and the second switch module (20) to be turned on or off at the same time. The first switch module (10) is electrically connected to the third switch module (30); The second switch module (20) is electrically connected to the first heating element (RT1), and the second switch module (20) is used to control the first heating element (RT1) to be powered on or off; The third switch module (30) is electrically connected to the second heating element (RT2), and the third switch module (30) is used to control the second heating element (RT2) to be powered on or off; When the first switch module (10) and the second switch module (20) are turned on, the third switch module (30) is configured to be turned off, so that the first heating element (RT1) is powered on; when the first switch module (10) and the second switch module (20) are turned off, the third switch module (30) is configured to be turned on, so that the second heating element (RT2) is powered on.

2. The heating element control circuit according to claim 1, characterized in that, The first switching module (10) includes a first switching device (Q1) and a first resistor (R1); The first end of the first resistor (R1) is electrically connected to the first end (501) of the controller (50), and the second end of the first resistor (R1) is electrically connected to the control end of the first switching device (Q1). The first terminal of the first switching device (Q1) is electrically connected to the control terminal of the third switching module (30), and the second terminal of the first switching device (Q1) is grounded.

3. The heating element control circuit according to claim 1, characterized in that, The second switching module (20) includes a second resistor (R2), a third resistor (R3), and a second switching device (Q2); The first end of the second resistor (R2) is electrically connected to the first end (501) of the controller (50), and the second end of the second resistor (R2) is electrically connected to the first end of the third resistor (R3) and the control end of the second switching device (Q2), respectively. The first end of the third resistor (R3) is electrically connected to the control terminal of the second switching device (Q2), and the second end of the third resistor (R3) is grounded; The first end of the second switching device (Q2) is electrically connected to the second end of the first heating element (RT1), and the second end of the second switching device (Q2) is grounded; the first end of the first heating element (RT1) is electrically connected to the positive terminal of the power supply (60).

4. The heating element control circuit according to claim 1, characterized in that, The third switching module (30) includes a fourth resistor (R4) and a third switching device (Q3); The first end of the fourth resistor (R4) is electrically connected to the control terminal of the third switching device (Q3), and the second end of the fourth resistor (R4) is grounded; The first end of the third switching device (Q3) is electrically connected to the second end of the second heating element (RT2), the second end of the third switching device (Q3) is grounded, and the control end of the third switching device (Q3) is electrically connected to the positive terminal of the power supply (60) and the first end of the first switching module (10) respectively; the first end of the second heating element (RT2) is electrically connected to the positive terminal of the power supply (60).

5. The heating element control circuit according to claim 1, characterized in that, The heating element control circuit also includes a fourth switch module (40); The fourth switch module (40) is electrically connected to the second terminal (502) of the controller (50), the first switch module (10) and the third switch module (30) respectively, and the fourth switch module (40) is used to be electrically connected to the power supply (60); The second end (502) of the controller (50) is used to control the fourth switch module (40) to be turned on or off; when the fourth switch module (40) is turned on and the first switch module (10) is turned off, the third switch module (30) is turned on; when the fourth switch module (40) is turned off and the first switch module (10) is turned on, the third switch module (30) is turned off.

6. The heating element control circuit according to claim 5, characterized in that, The fourth switch module (40) includes a fifth resistor (R5), a sixth resistor (R6), and a fourth switch device (Q4); The first end of the fifth resistor (R5) is electrically connected to the positive terminal of the power supply (60), and the second end of the fifth resistor (R5) is electrically connected to the control terminal of the fourth switching device (Q4). The first terminal of the fourth switching device (Q4) is electrically connected to the positive terminal of the power supply (60), the second terminal of the fourth switching device (Q4) is electrically connected to the first terminal of the sixth resistor (R6), and the control terminal of the fourth switching device (Q4) is electrically connected to the second terminal (502) of the controller (50). The second end of the sixth resistor (R6) is electrically connected to the first end of the first switch module (10) and the control end of the third switch module (30), respectively.

7. The heating element control circuit according to claim 1, characterized in that, The heating element control circuit also includes an overcurrent protection module (70); The overcurrent protection module (70) is electrically connected to the power supply (60) and the controller (50) respectively. The overcurrent protection module (70) is used to electrically connect to the first heating element (RT1) and the second heating element (RT2) respectively, and to control the controller (50), the first heating element (RT1) and the second heating element (RT2) to disconnect the power when the current output by the power supply (60) is greater than the current threshold.

8. The heating element control circuit according to claim 7, characterized in that, The overcurrent protection module (70) includes a fifth switching device (Q5), a seventh resistor (R7), and a power protection chip (71); The first terminal of the fifth switching device (Q5) is electrically connected to the ground terminal of the controller (50), the second terminal of the second switching module (20) and the second terminal of the third switching module (30), respectively. The second terminal of the fifth switching device (Q5) is electrically connected to the first terminal of the seventh resistor (R7). The control terminal of the fifth switching device (Q5) is electrically connected to the first terminal (711) of the power protection chip (71). The second end of the seventh resistor (R7) is electrically connected to the negative terminal of the power supply (60), and the seventh resistor (R7) is used to collect the current output by the power supply (60); The second terminal (712) of the power protection chip (71) is electrically connected to the first terminal of the seventh resistor (R7); The power protection chip (71) is used to obtain the real-time voltage value across the seventh resistor (R7), and when the real-time voltage value is greater than the voltage threshold, it controls the fifth switching device (Q5) to disconnect.

9. The heating element control circuit according to claim 8, characterized in that, The overcurrent protection module (70) also includes a sixth switching device (Q6); The first terminal of the sixth switching device (Q6) is electrically connected to the ground terminal of the controller (50), the second terminal of the second switching module (20), and the second terminal of the third switching module (30), respectively. The second terminal of the sixth switching device (Q6) is electrically connected to the first terminal of the fifth switching device (Q5). The control terminal of the sixth switching device (Q6) is electrically connected to the third terminal (713) of the power protection chip (71). The power protection chip (71) is configured to control the sixth switching device (Q6) to disconnect when the real-time voltage value is greater than the voltage threshold.

10. An atomizing device, characterized in that, Includes a heating element control circuit as described in any one of claims 1 to 9.

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