Energy-saving atomizing piece driving module device

Abstract

The embodiment of the application discloses an energy-saving atomizing piece driving module device, which comprises a metal shielding cover, a printed circuit board and an atomizing piece driving module; the printed circuit board is provided with the atomizing piece driving module and the metal shielding cover, and the atomizing piece driving module is used for realizing the driving of an external atomizing piece; wherein the atomizing piece driving module comprises a two-stage boosting driving circuit, a sweep frequency tracking circuit and a water shortage detection circuit; the atomizing piece driving module is located in a shielding space formed between the printed circuit board and the metal shielding cover. The two-stage boosting driving circuit, the sweep frequency tracking circuit and the water shortage detection circuit are integrated into the atomizing piece driving module in a modular integrated manner, so that the energy-saving atomizing piece driving module device can be flexibly applied to various products or devices, the product development efficiency is improved, and the atomizing piece is driven to work in a constant power state by the two-stage boosting driving circuit, so that the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of atomizing piece driving circuit, in particular to an energy-saving atomizing piece driving module device. BACKGROUND

[0002] In recent years, ceramic atomizing pieces are widely used in humidifiers, aromatherapy machines, medical mist therapy machines, electronic cigarettes and other product fields. The atomizing pieces are provided with corresponding driving circuits or driving systems for driving the atomizing pieces to work. The driving system generally consists of the following parts: a boost circuit, a vibration circuit, a frequency tracking circuit, a water shortage detection circuit, a control system and a ceramic piece. The working process of the driving atomizing piece is as follows: the control system corresponding to each product outputs a pulse signal and the atomizing piece generates vibration, so as to disperse the liquid water molecule structure and generate natural and natural atomized water; the frequency of the pulse signal is constantly adjusted by tracking the current of the atomizing piece to make the atomizing piece work at the best frequency point, and the water shortage detection of the atomizing piece is realized by touching the spring value or detecting the change of the current of the atomizing piece.

[0003] However, due to the difficulty and high cost of developing the atomizing piece driving circuit or driving system, the atomizing piece driving circuit or driving system developed at present is not perfect, the working efficiency of the driving atomizing piece is low, and the accuracy of the water shortage detection of the atomizing piece is low. Therefore, how to provide an atomizing piece driving circuit to improve the driving efficiency of the atomizing piece is a problem to be solved. SUMMARY

[0004] Therefore, in order to solve the problems of the prior art, the embodiments of the present application provide an energy-saving atomizing piece driving module device.

[0005] In a first aspect, the present application provides an energy-saving atomizing piece driving module device, comprising a metal shield, a printed circuit board and an atomizing piece driving module.

[0006] The printed circuit board is provided with the atomizing piece driving module and the metal shield, and the atomizing piece driving module is used to realize the driving of an external atomizing piece; wherein the atomizing piece driving module comprises a two-stage boost driving circuit, a sweep frequency tracking circuit and a water shortage detection circuit.

[0007] The atomizing piece driving module is located in the shielding space formed between the printed circuit board and the metal shield.

[0008] In an optional embodiment, the two-stage boost driving circuit comprises a first-stage boost driving circuit and a second-stage boost driving circuit connected in series.

[0009] The first-stage boost driving circuit boosts the power supply voltage.

[0010] The second-stage boost driving circuit is connected with the first-stage boost driving circuit, and is configured to perform secondary voltage boosting on the boosted supply voltage output by the first-stage boost driving circuit, so as to realize driving of the atomizing piece.

[0011] In an optional embodiment, the first-stage boost driving circuit comprises first to fifth capacitors, first to third resistors, first to second diodes, a first inductor, and a first transistor.

[0012] The first resistor is connected with the second resistor and the first end of the first transistor respectively, and is configured to receive a boost control signal from the controller; the second end of the second resistor and the second end of the first transistor are grounded.

[0013] The first end of the first capacitor, the first end of the second capacitor, and the first parallel end of the first diode are connected with the second end of the first transistor; the second parallel end of the first capacitor, the second parallel end of the second capacitor, and the second parallel end of the first diode are connected with one end of the second diode, and are configured to output the boosted supply voltage.

[0014] The other end of the second diode is connected with the third end of the first transistor, one end of the third capacitor, and one end of the first inductor respectively.

[0015] The first parallel end of the fourth capacitor and the fifth capacitor is connected with the other end of the first inductor; the second parallel end of the fourth capacitor and the fifth capacitor is connected with one end of the third resistor.

[0016] The other end of the third resistor is connected with the other end of the third capacitor.

[0017] In an optional embodiment, the second-stage boost driving circuit comprises a protection unit and an oscillation unit connected with each other.

[0018] The oscillation unit is configured to perform secondary voltage boosting on the supply voltage.

[0019] The protection unit is configured to perform overvoltage protection on the atomizing piece.

[0020] In an optional embodiment, the oscillation unit comprises a fourth resistor, a fifth resistor, a second transistor, a second inductor, and a sixth capacitor.

[0021] The fourth resistor is connected with one end of the fifth resistor and the first end of the second transistor respectively, and the other end of the fifth resistor is grounded.

[0022] The second end of the second transistor is connected with one end of the second inductor, and the third end of the second transistor is connected with the sweep frequency tracking circuit.

[0023] The other end of the second inductor is grounded through the sixth capacitor.

[0024] In an optional embodiment, the other end of the second inductor is also connected to the first-stage boost driving circuit for inputting the boosted supply voltage;

[0025] The second end of the second transistor is also connected to the protection unit for inputting the twice-boosted supply voltage to the protection unit to drive the atomizing piece to work.

[0026] In an optional embodiment, the protection unit comprises a first filter circuit, a second filter circuit, a third filter circuit, a third diode and a seventh capacitor;

[0027] The atomizing piece is connected to the first filter circuit through a first pin and grounded through the seventh capacitor; and the atomizing piece is grounded through a second pin;

[0028] The first filter circuit is connected to one end of the third diode, the second filter circuit and the second-stage boost driving circuit, respectively;

[0029] The other end of the third diode is connected to the third filter circuit.

[0030] In an optional embodiment, the atomizing piece driving module further comprises a controller connected to the first-stage boost driving circuit, the second-stage boost driving circuit, the sweep tracking circuit and the water shortage detection circuit, respectively;

[0031] The controller is configured to input a boost control signal to the first-stage boost driving circuit and input an oscillation signal to the second-stage boost driving circuit;

[0032] The sweep tracking circuit is configured to sample a first current flowing through the atomizing piece and perform analog-to-digital conversion on the first current after receiving a first analog-to-digital conversion signal from the controller, so that the controller adjusts the resonant frequency of the atomizing piece based on the converted first current and the duty cycle of the boost control signal and the oscillation signal;

[0033] The water shortage detection circuit is configured to sample a second current flowing through the atomizing piece and perform analog-to-digital conversion on the second current after receiving a second analog-to-digital conversion signal from the controller, so that the controller detects the water shortage of the atomizing piece based on the level state corresponding to the converted second current.

[0034] In an optional embodiment, the sweep tracking circuit comprises a fourth filter circuit, a fourth diode and a fifth filter circuit;

[0035] The fourth filter circuit is connected to the fourth diode and the fifth filter circuit, respectively, for receiving the first analog-to-digital conversion signal from the controller.

[0036] The fifth filter circuit is further connected to the second-stage boost driving circuit.

[0037] In an optional embodiment, the water deficiency detection circuit comprises a sixth filter circuit and a sixth resistor.

[0038] The sixth filter circuit is connected to a power supply end through the sixth resistor, and is configured to receive a second analog-to-digital conversion signal from the controller.

[0039] The sixth filter circuit is further connected to the fourth diode.

[0040] The embodiments of the present application have the following beneficial effects:

[0041] The energy-saving atomizing piece driving module device provided by the embodiments of the present application comprises a metal shielding cover, a printed circuit board and an atomizing piece driving module. The printed circuit board is provided with the atomizing piece driving module and the metal shielding cover, and the atomizing piece driving module is configured to drive an external atomizing piece. The atomizing piece driving module comprises a two-stage boost driving circuit, a sweep frequency tracking circuit and a water deficiency detection circuit. The atomizing piece driving module is located in a shielding space formed between the printed circuit board and the metal shielding cover. The two-stage boost driving circuit, the sweep frequency tracking circuit and the water deficiency detection circuit are integrated into the atomizing piece driving module in a modularized manner. The communication protocol used when the atomizing piece driving module is connected to an external device can be set according to requirements, so that the communication protocol is universal, and the communication protocol is relatively simple and easy to develop and apply. Therefore, the modularized integration process and the simple communication protocol make the energy-saving atomizing piece driving module device flexible to be applied to various products or devices, improve the development efficiency, and effectively reduce the development cost, the production cost and the development difficulty. The two-stage boost driving circuit is used to drive the atomizing piece to work, and the sweep frequency tracking circuit is used to realize sweep frequency tracking of the resonant frequency of the atomizing piece, so that the atomizing piece works at the best frequency point and works in a constant power state, thereby improving the working efficiency of the atomizing piece. The independent sweep frequency tracking circuit effectively improves the sweep frequency accuracy of the resonant frequency. The independent water deficiency detection circuit is used to realize water deficiency detection, effectively improves the accuracy of water deficiency detection of the atomizing piece, and can accurately detect the dry burning state of a small-power atomizing piece. In addition, the metal shielding cover has the functions of isolating signal radiation interference and heat dissipation, so that the energy-saving atomizing piece driving module device can be better applied to actual scenes. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical solutions of the present application, the drawings needed in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as limiting the scope of protection of the present application. In the various drawings, similar components are denoted by similar reference numerals.

[0043] Figure 1a A first structural schematic diagram of the energy-saving atomizing piece driving module device in the embodiments of the present application is shown.

[0044] Figure 1b A second structural schematic diagram of the energy-saving atomizing piece driving module device in the embodiments of the present application is shown.

[0045] Figure 2 A first structural schematic diagram of the atomizing piece driving module in the embodiments of the present application is shown.

[0046] Figure 3 A structural schematic diagram of the first-stage boost driving circuit in the embodiments of the present application is shown.

[0047] Figure 4 A second structural schematic diagram of the atomizing piece driving module in the embodiments of the present application is shown.

[0048] Main component symbol explanation:

[0049] 100-metallic shield; 200-printed circuit board; 300-atomizing piece driving module; 310-first-stage boost driving circuit; 320-second-stage boost driving circuit; 321-oscillation unit; 322-protection unit; 330-sweep frequency tracking circuit; 340-water shortage detection circuit. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments of the present application will be described clearly and completely in the embodiments of the present application in combination with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application.

[0051] The components of the embodiments of the present application generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0052] Hereinafter, the terms "include", "have", and their conjugates, used in the various embodiments of the present application, merely indicate the presence of the features, numbers, steps, operations, elements, components, or combinations thereof, and do not preclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof.

[0053] In addition, the terms "first", "second", "third", and the like are used only to distinguish descriptions, and are not to be understood as indicating or implying relative importance.

[0054] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of the present application belong. The terms (such as terms defined in a generally used dictionary) will be interpreted to have the same meaning as the contextual meaning in the relevant technical field and will not be interpreted to have idealized or overly formal meanings, unless clearly defined in the various embodiments of the present application.

[0055] Embodiment 1

[0056] As shown in Figure 1a , Figure 1b , Figure 2 The embodiments of the present application provide an energy-saving atomizing piece driving module device, which comprises a metal shielding cover 100, a printed circuit board 200, and an atomizing piece driving module 300.

[0057] The printed circuit board 200 is provided with the atomizing piece driving module 300 and the metal shielding cover 100; the atomizing piece driving module 300 is located in a shielding space formed between the printed circuit board 200 and the metal shielding cover 100. Optionally, the metal shielding cover 100 and the printed circuit board 200 can be buckled by any one of a cover buckle, welding, and welding of the cover buckle, and preferably, the metal shielding cover 100 is welded to the printed circuit board 200.

[0058] It can be understood that the atomizing piece driving module 300 is used to realize the driving of the atomizing piece; in an embodiment, the atomizing piece driving module 300 comprises a controller (not shown in the figure), a two-stage boost driving circuit (a first-stage boost driving circuit 310 and a second-stage boost driving circuit 320), a sweep tracking circuit 330, and a water shortage detection circuit 340.

[0059] The controller is used to connect with an external main controller to receive a control signal of the main controller, and send a corresponding signal to each circuit in the atomizing piece driving module 300 according to the control signal, the corresponding signal including a boost control signal, an oscillation signal, an analog-digital conversion signal and the like, and then control the on-off of each circuit through the corresponding signal to realize corresponding functions. Optionally, the controller can be an MCU chip or a microcontroller.

[0060] The controller, the two-stage boost driving circuit, the sweep frequency tracking circuit 330 and the water shortage detection circuit 340 are integrated into the atomizing piece driving module 300 in a modular integration manner, and the atomizing piece driving module 300 is arranged on the printed circuit board 200.

[0061] The atomizing piece driving module 300 is used to connect with an external device or an atomizing piece MIST, and a communication connection is established between the controller and an external main controller to control the on-off of each circuit in the atomizing piece driving module 300 to realize the driving of the external atomizing piece MIST or water shortage detection. The external device is various products or devices containing the atomizing piece MIST, such as an aromatherapy machine, a humidifier, an atomizer and the like. Moreover, the communication protocol used when the atomizing piece driving module 300 is in communication connection with the external device can be set according to requirements, so that the communication protocol is relatively simple and easy to develop and apply, thereby making the atomizing piece MIST driving device flexible to be applied to various products or devices, and without the need to develop a communication protocol and a driving control program in the application process, so as to reduce the development difficulty and cost and improve the development efficiency.

[0062] The atomizing piece MIST driving device provided by the embodiment of the present application can effectively suppress signal and radiation interference in space by adding the metal shielding cover 100, facilitate subsequent anti-interference ability test of the atomizing piece driving module 300 through electromagnetic radiation, and greatly reduce the debugging difficulty of the atomizing piece MIST driving device in EMC (electromagnetic interference size and anti-interference ability). In addition, the metal shielding cover 100 also has a heat dissipation function. Specifically, the metal shielding cover 100 can be connected with the printed circuit board 200 to increase the heat dissipation area, and the inductance components integrated on the printed circuit board 200 are connected with the inner side of the metal shielding cover 100, and the heat-conducting silicone grease on the metal shielding cover 100 is connected with the printed circuit board 200 and components thereof, so as to improve the heat dissipation ability.

[0063] As shown in Figures 2 to 4 The embodiment of the present application provides an atomizing piece driving module 300, which comprises a two-stage boost driving circuit, a sweep frequency tracking circuit 330 and a water shortage detection circuit 340. The two-stage boost driving circuit comprises a first-stage boost driving circuit 310 and a second-stage boost driving circuit 320.

[0064] In the embodiment, the first-stage boost driving circuit 310 is configured to boost the power supply voltage (VBAT) input from the external battery to, for example, (25±1) V after receiving the boost control signal (Boost_PWM) input from the controller.

[0065] The second-stage boost driving circuit 320 is configured to further boost the power supply voltage (VCC) boosted by the first-stage boost driving circuit 310, i.e., amplify the 25 V power supply voltage boosted by the first-stage boost driving circuit 310 by about 2.7 times, so as to drive the external atomizing piece MIST based on the twice-boosted power supply voltage to make the atomizing piece MIST resonate.

[0066] The sweep tracking circuit 330 is configured to sample the first current flowing through the atomizing piece MIST (or sample the voltage value of the atomizing piece MIST) during the operation of the atomizing piece MIST, and perform analog-to-digital conversion on the first current after receiving the first analog-to-digital conversion signal from the controller, so that the controller adjusts the resonance frequency of the atomizing piece MIST based on the converted first current and the duty cycles of the boost control signal and the oscillation signal, i.e., tracks the current value flowing through the atomizing piece MIST to constantly fine-tune the frequency of the oscillation signal output by the controller, and further adjusts the boost value of the power supply voltage, so that the atomizing piece MIST operates at the optimal frequency point under the driving of the boosted power supply voltage.

[0067] Specifically, when the oscillation signal of the second-stage boost driving circuit 320 makes the atomizing piece MIST oscillate (resonate) to disperse the liquid water molecule structure and generate naturally floating atomized water, the controller tracks the current value flowing through the atomizing piece MIST sampled by the sweep tracking circuit 330, the sweep tracking circuit 330 sends the sampled first current to the controller after analog-to-digital conversion, so that the controller outputs new boost control signals and oscillation signals based on the sampled first current to constantly adjust the frequencies of the corresponding signals output to the first-stage boost driving circuit 310 and the second-stage boost driving circuit 320 until the frequency of the oscillation signal of the second-stage boost driving circuit 320 is the same as the resonance frequency of the atomizing piece MIST, and further makes the power supply current (or power supply voltage) in the atomizing piece driving module 300 reach the working current (or working voltage) of the atomizing piece MIST; wherein the working current of the atomizing piece MIST can be set according to actual conditions, which is not limited here.

[0068] The water shortage detection circuit 340 is configured to realize water shortage detection of the atomizing piece MIST by the reverse conduction characteristic of the diode in the sweep tracking circuit 330.

[0069] Specifically, the controller determines whether the atomizing element MIST is currently short of water by sampling changes in the current value flowing through it via the water shortage detection circuit 340. Specifically, water shortage detection is achieved by sampling the voltage level corresponding to the current value flowing through the atomizing element MIST. If the current value decreases and the corresponding voltage level is low, it indicates that the atomizing element is currently short of water. Furthermore, external software or devices can determine whether the atomizing element is short of water by observing the voltage level of the signal output by the energy-saving atomizing element drive module; that is, when the voltage level signal is low, the atomizing element is currently in a water shortage state.

[0070] Furthermore, the frequency sweep tracking circuit 330 and the water shortage detection circuit 340 respectively sample the current and perform analog-to-digital conversion on the sampled current value to convert it into a corresponding digital signal and transmit it to the controller. This allows the controller to adjust the frequency of the boost control signal and oscillation signal output to the atomizing plate drive module 300 based on the sampled current value, and to perform water shortage detection based on the changes in the sampled current value.

[0071] In this embodiment, when the atomizing plate MIST is working normally, the voltage across the MIST remains stable within a normal range and does not change significantly; that is, the current flowing through the MIST remains stable. However, if the water level decreases to a certain extent or there is no water, the current across the MIST will change. In other words, when the MIST is working, if it is currently short of water, the current flowing through it will change. This change pattern is used to determine whether the MIST is short of water. In this embodiment, the types of water shortage conditions for the MIST include water level decreasing to a certain extent, no water, and water level falling below a predetermined threshold.

[0072] Exemplary, the first-stage boost drive circuit 310 includes first to fifth capacitors, first to third resistors, first to second diodes, a first inductor L1, and a first transistor Q1.

[0073] In one embodiment, the first resistor R1 is connected to the second resistor R2 and the first terminal of the first transistor Q1, respectively, for receiving the boost control signal from the controller; the second terminal of the second resistor R2 and the second terminal of the first transistor Q1 are both grounded; the first parallel terminal of the first capacitor C1, the second capacitor C2 and the first diode D1 is connected to the second terminal of the first transistor Q1; the second parallel terminal of the first capacitor C1, the second capacitor C2 and the first diode D1 is connected to one terminal (cathode) of the second diode D2, for outputting the boosted supply voltage; the other terminal (anode) of the second diode D2 is connected to the third terminal of the first transistor Q1, one terminal of the third capacitor C3 and the first inductor L1 (e.g., ...). Figure 2One end of L1); the fourth capacitor C4 (as shown in the image) Figure 2 The first parallel terminal of capacitors C12 and C5 is connected to the other end of the first inductor L1; the first parallel terminal of capacitors C12 and C5 is also used to connect to the dedicated operating mode pin (VBAT) of the external battery to input the supply voltage; the second parallel terminal of capacitors C4 and C5 is connected to one end of the third resistor R3; the second parallel terminal of capacitors C4 and C5 is also used to ground. The other end of the third resistor R3 is connected to the other end of the third capacitor C3. The first-stage boost drive circuit 310 is used to boost the supply voltage.

[0074] By way of example, the first transistor Q1 is an NMOS transistor, such as an NMOS transistor of model A03400; furthermore, the drain of the first transistor Q1 is connected to the first resistor R1, the third capacitor C3 and the second diode D2 respectively; the gate of the first transistor Q1 is connected to the first resistor R1 and the second resistor R2 respectively; and the source of the first transistor Q1 is grounded.

[0075] In one embodiment, the second-stage boost drive circuit 320 includes an oscillation unit 321 and a protection unit 322 connected together; the oscillation unit 321 is used to perform a secondary boost on the power supply voltage output by the first-stage boost drive circuit; the protection unit 322 is used to provide overvoltage protection for the atomizing plate MIST.

[0076] As an example, the oscillation unit 321 includes a fourth resistor R4, a fifth resistor R5, a second transistor Q2, a second inductor L2, and a sixth capacitor C6.

[0077] In one embodiment, the fourth resistor R4 is connected to one end of the fifth resistor R5 and the first end of the second transistor Q2, respectively, to receive the oscillation signal (MIST_PWM) from the controller, and the other end of the fifth resistor R5 is grounded; the second end of the second transistor Q2 is connected to one end of the second inductor L2, and the third end of the second transistor Q2 is connected to the frequency sweep tracking circuit 330; the other end of the second inductor L2 is grounded through the sixth capacitor C6. The other end of the second inductor L2 is also connected to the first-stage boost drive circuit 310, for inputting the boosted supply voltage; the second end of the second transistor Q2 is also connected to the protection unit 322, for inputting the secondary boosted supply voltage to the atomizing plate MIST to drive the atomizing plate MIST to work.

[0078] As an example, the second transistor Q2 is an NMOS transistor, such as an A03400 NMOS transistor. Furthermore, the drain of the second transistor Q2 is connected to the second inductor L2 and the protection unit 322, respectively; the gate of the second transistor Q2 is connected to the fourth resistor R4 and the fifth resistor R5, respectively; and the source of the second transistor Q2 is connected to the sweep frequency tracking circuit 330.

[0079] The second-stage voltage boosting driving circuit 320 is connected with the first-stage voltage boosting driving circuit 310, and is configured to perform secondary voltage boosting on the boosted power supply voltage output by the first-stage voltage boosting driving circuit 310, and drive the external atomizing piece MIST to work.

[0080] The sweep frequency tracking circuit 330 includes a fourth filter circuit, a fourth diode D4 and a fifth filter circuit, for example. The fourth filter circuit is connected with the fourth diode D4 and the fifth filter circuit respectively, and is configured to receive the first analog-digital conversion signal (MIST_AD1) from the controller. The fifth filter circuit is further connected with the second-stage voltage boosting driving circuit 320. Optionally, the fourth filter circuit and the fifth filter circuit are both RC filter circuits, and are configured to provide filter protection for the circuit.

[0081] The fourth filter circuit includes an eighth capacitor C8 and a seventh resistor R7, and the fifth filter circuit includes a ninth capacitor C9 and an eighth resistor R8, for example. One end of the seventh resistor R7 is connected with the controller, and the other end of the seventh resistor R7 is connected with the eighth capacitor C8, the fourth diode D4 and one end of the eighth resistor R8 respectively. The other end of the eighth capacitor C8 is grounded, and the ninth capacitor C9 is connected in parallel between the seventh resistor R7 and the eighth resistor R8. The eighth resistor R8 is used as a sampling resistor to sample the first current and the second current in the circuit.

[0082] The water shortage detection circuit 340 is configured to sample the second current flowing through the atomizing piece MIST (or sample the voltage value flowing through the atomizing piece MIST), and perform analog-digital conversion processing on the second current after receiving the second analog-digital conversion signal from the controller, so that the controller can realize water shortage detection of the atomizing piece MIST based on the converted second current.

[0083] The water shortage detection circuit 340 includes a sixth filter circuit and a sixth resistor R6, for example. The sixth filter circuit is connected with the power supply end (5V reference power supply end) through the sixth resistor R6, and is configured to receive the second analog-digital conversion signal (MIST_AD2) from the controller. The sixth filter circuit is further connected with the fourth diode D4.

[0084] The sixth filter circuit includes a tenth capacitor C10 and a ninth resistor R9, for example. The tenth capacitor C10 and the ninth resistor R9 are connected in parallel, and the first parallel end of the tenth capacitor C10 and the ninth capacitor C9 is connected with the fourth diode D4 and the sixth resistor R6 respectively. The second parallel end of the tenth capacitor C10 and the ninth resistor R9 is grounded.

[0085] It should be noted that the sixth resistor R6 and the ninth resistor R9 are used as a voltage dividing resistor to provide a reference current value or a reference voltage value, which can be set according to actual conditions. When the atomizing piece MIST is short of water, the current value corresponding to the working voltage value (i.e. the current working voltage value of the atomizing piece driving module) sampled by the sweep tracking circuit 330 is less than the reference voltage value in the water shortage detection circuit 340, the fourth diode D4 is reversely turned on, that is, the tenth capacitor C10, the ninth resistor R9 and the sixth resistor R6 are connected to the atomizing piece driving module 300, so that the current value (or voltage value) flowing through the atomizing piece MIST sampled by the sampling resistor (eighth resistor R8) changes (i.e. the current value is less than the reference current value), which indicates that the current atomizing piece MIST is short of water, so that the water shortage detection can be realized according to the change of the sampled current value. In this water shortage detection mode, the spring does not need to be touched, which improves the water shortage detection efficiency and accuracy. Furthermore, in the case of setting the reference voltage value, the water shortage detection of the atomizing piece MIST with a power greater than 2W can be realized.

[0086] In this embodiment, the voltage value flowing through the atomizing piece MIST is compared with the reference voltage value to realize the water shortage detection of the current atomizing piece MIST, and the circuit structure improves the water shortage detection accuracy of the atomizing piece MIST in the dry burning state with a power of 2W-5W.

[0087] The protection unit 322 includes a first filter circuit, a second filter circuit, a third filter circuit, a third diode D3 and a seventh capacitor C7; the atomizing piece MIST is connected to the first filter circuit through a first pin and grounded through the seventh capacitor C7; the atomizing piece MIST is grounded through a second pin; the first filter circuit is connected to one end of the third diode D3, the second filter circuit and the second-stage boost driving circuit 320; the other end of the third diode D3 is connected to the third filter circuit.

[0088] Exemplarily, the third to fourth filter circuits are RC circuits, wherein the first filter circuit includes an eleventh capacitor C11 and a tenth resistor R10; the second filter circuit includes a twelfth capacitor C12 and an eleventh resistor R11; the third filter circuit includes a thirteenth capacitor C13 and a twelfth resistor R12.

[0089] Further, the eleventh capacitor C11 is connected in series with the tenth resistor R10, the tenth resistor R10 is connected with the first pin of the atomizing piece MIST, the eleventh capacitor C11 is connected with the anode of the third diode D3 and the twelfth capacitor C12 and the second-stage boost driving circuit 320 respectively; the twelfth capacitor C12 is connected in series with the eleventh resistor R11 and then grounded; the cathode of the third diode D3 is connected with the first parallel end of the thirteenth capacitor C13 and the twelfth resistor R12, and the second parallel end of the thirteenth capacitor C13 and the twelfth resistor R12 is grounded.

[0090] In addition, the controller controls the oscillation signal (such as the oscillation signal with a frequency of 2.4M) to be output intermittently with a preset period, so as to periodically drive the atomizing piece MIST to work, so that the atomizing piece MIST works intermittently, wherein the preset period is not limited here. When the controller outputs the oscillation signal to the second-stage boost driving circuit 320, the eighth capacitor C8 is used to charge and store energy at the same time; when the controller outputs the oscillation signal to the second-stage boost driving circuit 320, the eighth capacitor C8 is used to discharge; thus, the embodiment can make the power of the input oscillation signal constant through the energy storage of the eighth capacitor C8, so as to ensure the working energy of the atomizing piece MIST, that is, to ensure that the atomizing piece MIST can work normally and improve the working efficiency; and then prolong the working life of the atomizing piece MIST in intermittent working.

[0091] The embodiment of the present application indirectly controls the constant-power working of the atomizing piece MIST by intermittently outputting the oscillation signal through the two-stage boost driving circuit, so as to improve the working efficiency of the atomizing piece MIST; and the current flowing through the atomizing piece MIST is sampled through the two-stage analog-digital conversion circuit, and compared with the set reference current value, so as to realize the water shortage detection of the atomizing piece MIST under normal working, thereby improving the accuracy of the water shortage detection of the atomizing piece in the dry burning state.

[0092] The various parts of the atomizing piece driving module 300 provided in the embodiment of the present application can be realized through module integration, and the communication protocol between the atomizing piece driving module 300, the internal circuit of the atomizing piece driving module 300 and external devices (or products) is simple, thereby improving the application flexibility, and for the products with the same atomizing piece driving module 300, the circuit structure, the communication protocol and the function program thereof do not need to be developed again, thereby reducing the development difficulty, reducing the development cost and improving the development efficiency.

[0093] In all the examples shown and described herein, any specific values should be interpreted as merely exemplary and not as a limitation, and thus other examples of the example embodiments can have different values.

[0094] It should be noted that like numerals and letters refer to like items throughout the several views, and once an item is defined in one view, it should not require further defining and explaining in the subsequent views.

[0095] The above-described embodiments are merely illustrative for the several embodiments of the present application, and the description is relatively specific and detailed, but should not be understood as limiting the scope of the present application. It should be noted that for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. An energy saving atomizing piece driving module apparatus, characterized by, The metal shielding cover, the printed circuit board and the atomizing piece driving module are included. The atomizing piece driving module is arranged on the printed circuit board and the metal shielding cover, and is used for driving the atomizing piece. The atomizing piece driving module is arranged in the shielding space formed between the printed circuit board and the metal shielding cover. The two-stage boost driving circuit includes a first-stage boost driving circuit and a second-stage boost driving circuit connected with each other. The controller is connected with the first-stage boost driving circuit, the second-stage boost driving circuit, the sweep frequency tracking circuit and the water shortage detection circuit. The controller is used for inputting a boost control signal to the first-stage boost driving circuit and inputting an oscillation signal to the second-stage boost driving circuit. The sweep frequency tracking circuit is used for sampling a first current flowing through the atomizing piece, and performing analog-digital conversion on the first current after receiving a first analog-digital conversion signal from the controller, so that the controller adjusts the resonant frequency of the atomizing piece based on the converted first current and the duty cycle of the boost control signal and the oscillation signal.

2. The energy saving atomizing piece driving module apparatus according to claim 1, wherein, The water shortage detection circuit is used for sampling a second current flowing through the atomizing piece, and performing analog-digital conversion on the second current after receiving a second analog-digital conversion signal from the controller, so that the controller detects the water shortage of the atomizing piece based on the level state corresponding to the converted second current. The first-stage boost driving circuit boosts the supply voltage.

3. The energy saving atomizing piece driving module apparatus according to claim 2, wherein, The second-stage boost driving circuit is connected with the first-stage boost driving circuit, and is used for boosting the boosted supply voltage output by the first-stage boost driving circuit, so as to drive the atomizing piece. The first-stage boost driving circuit includes a first to fifth capacitor, a first to third resistor, a first to second diode, a first inductor and a first transistor. The first resistor is connected with the second resistor and the first end of the first transistor. The first capacitor, the second capacitor and the first diode are connected with the second end of the first transistor. The second end of the first diode is connected with the third end of the first transistor, one end of the third capacitor and one end of the first inductor. The other end of the fourth capacitor and the fifth capacitor is connected with the other end of the first inductor.

4. The energy saving atomizing piece driving module apparatus according to claim 2, wherein, The other end of the third resistor is connected with the other end of the third capacitor. The second-stage boost driving circuit includes a protection unit and an oscillation unit connected with each other. The oscillation unit is used for boosting the supply voltage. The protection unit is used for overvoltage protection of the atomizing piece.

5. The energy saving atomizing piece driving module apparatus according to claim 4, wherein, The oscillation unit comprises a fourth resistor, a fifth resistor, a second transistor, a second inductor and a sixth capacitor; The fourth resistor is connected with one end of the fifth resistor and the first end of the second transistor respectively, and the other end of the fifth resistor is grounded; The second end of the second transistor is connected with one end of the second inductor, and the third end of the second transistor is connected with the sweep tracking circuit; The other end of the second inductor is grounded through the sixth capacitor.

6. The energy saving atomizing piece driving module apparatus according to claim 5, wherein, The other end of the second inductor is also connected with the first-stage boost driving circuit for inputting the boosted power supply voltage; The second end of the second transistor is also connected with the protection unit for inputting the secondary-boosted power supply voltage to the protection unit to drive the atomizing piece to work.

7. The energy saving atomizing piece driving module apparatus according to claim 4, wherein, The protection unit comprises a first filter circuit, a second filter circuit, a third filter circuit, a third diode and a seventh capacitor; The atomizing piece is connected with the first filter circuit through a first pin and grounded through the seventh capacitor; and the atomizing piece is grounded through a second pin; The first filter circuit is connected with one end of the third diode, the second filter circuit and the second-stage boost driving circuit respectively; The other end of the third diode is connected with the third filter circuit.

8. The energy saving atomizing piece driving module apparatus according to claim 1 or 2, characterized by, The sweep tracking circuit comprises a fourth filter circuit, a fourth diode and a fifth filter circuit; The fourth filter circuit is connected with the fourth diode and the fifth filter circuit respectively; The fifth filter circuit is also connected with the second-stage boost driving circuit.

9. The energy saving atomizing piece driving module apparatus according to claim 8, wherein, The water shortage detection circuit comprises a sixth filter circuit and a sixth resistor; The sixth filter circuit is connected with the power supply end through the sixth resistor; The sixth filter circuit is also connected with the fourth diode.

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