CN218775045U - Energy-saving atomization sheet driving module device - Google Patents
Energy-saving atomization sheet driving module device Download PDFInfo
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- CN218775045U CN218775045U CN202223239161.5U CN202223239161U CN218775045U CN 218775045 U CN218775045 U CN 218775045U CN 202223239161 U CN202223239161 U CN 202223239161U CN 218775045 U CN218775045 U CN 218775045U
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Abstract
The embodiment of the utility model discloses an energy-saving atomization sheet driving module device, which comprises a metal shielding cover, a printed circuit board and an atomization sheet driving module; the printed circuit board is provided with an atomizing sheet driving module and a metal shielding cover, and the atomizing sheet driving module is used for driving an external atomizing sheet; the atomization plate driving module comprises a two-stage boosting driving circuit, a frequency sweep tracking circuit and a water shortage detection circuit; the atomization plate driving module is positioned in a shielding space formed between the printed circuit board and the metal shielding case. The embodiment of the application integrates the two-stage boosting drive circuit, the sweep frequency tracking circuit and the water shortage detection circuit into the atomization sheet drive module in a modular integration mode, so that the energy-saving atomization sheet drive module device can be flexibly applied to various products or equipment, the product development efficiency is improved, the two-stage boosting drive circuit is used for driving the atomization sheet to work under the constant power state, and the working efficiency is improved.
Description
Technical Field
The utility model relates to an atomizing piece drive circuit field especially relates to an energy-conserving atomizing piece drive module device.
Background
In recent years, ceramic atomizing sheets are widely used in various product fields such as humidifiers, aromatherapy machines, medical mist therapy machines, electronic cigarettes, and the like. The atomization piece is simultaneously provided with a corresponding driving circuit or a driving system for driving the atomization piece to work. The driving system generally comprises the following parts: the device comprises a booster circuit, an oscillation circuit, a frequency tracking circuit, a water shortage detection circuit, a control system and a ceramic chip. The working process of driving the atomizing sheet is as follows: the control system corresponding to each product outputs a pulse signal to vibrate with the atomizing sheet, so that the liquid water molecule structure is scattered to generate naturally elegant atomized water; the current of the atomizing sheet is tracked to continuously fine-tune the frequency of the pulse signal, so that the atomizing sheet works at the optimal frequency point, and meanwhile, the water shortage detection of the atomizing sheet is realized through the touch spring value or through detecting the change condition of the current of the atomizing sheet.
However, since the development difficulty of the driving circuit or driving system of the atomizing plate is high and the development cost is high, the driving circuit or driving system of the atomizing plate developed at present is not perfect enough, and the working efficiency of driving the atomizing plate is low, so that the accuracy of detecting the water shortage of the atomizing plate is low, and therefore, how to provide the driving circuit of the atomizing plate to improve the driving efficiency of the atomizing plate is an urgent problem to be solved.
SUMMERY OF THE UTILITY MODEL
In a first aspect, the utility model provides an energy-saving atomization plate driving module device, which comprises a metal shielding cover, a printed circuit board and an atomization plate driving module;
the printed circuit board is provided with the atomizing sheet driving module and the metal shielding case, and the atomizing sheet driving module is used for driving an external atomizing sheet; the atomization sheet driving module comprises a two-stage boosting driving circuit, a frequency sweeping tracking circuit and a water shortage detection circuit;
the atomization sheet driving module is positioned in a shielding space formed between the printed circuit board and the metal shielding case.
In an alternative embodiment, the two-stage boost driving circuit comprises a first stage boost driving circuit and a second stage boost driving circuit which are connected;
the first stage boosting driving circuit boosts the power supply voltage;
and the second-stage boosting drive circuit is connected with the first-stage boosting drive circuit and is used for boosting the boosted power supply voltage output by the first-stage boosting drive circuit for the second time, so that the atomization sheet is driven.
In an optional embodiment, the first stage boost driving circuit includes first to fifth capacitors, first to third resistors, first to second diodes, a first inductor, and a first transistor;
the first resistor is respectively connected with the second resistor and the first end of the first transistor and used for receiving a boosting control signal from the controller; a second terminal of the second resistor and a second terminal of the first transistor are both grounded;
the first parallel ends of the first capacitor, the second capacitor and the first diode are connected with the second end of the first transistor; the first capacitor, the second capacitor and a second parallel end of the first diode are connected with one end of a second diode and used for outputting boosted power supply voltage;
the other end of the second diode is respectively connected with a third end of the first transistor, one end of a third capacitor and one end of the first inductor;
the first parallel end of the fourth capacitor and the first parallel end of the fifth capacitor are connected with the other end of the first inductor; second parallel ends of the fourth capacitor and the fifth capacitor are connected with one end of a third resistor;
the other end of the third resistor is connected with the other end of the third capacitor.
In an alternative embodiment, the second stage boost driving circuit comprises a protection unit and an oscillation unit which are connected;
the oscillating unit is used for carrying out secondary boosting on the power supply voltage;
the protection unit is used for carrying out overvoltage protection on the atomization sheet.
In an alternative embodiment, the oscillating unit includes a fourth resistor, a fifth resistor, a second transistor, a second inductor, and a sixth capacitor;
the fourth resistor is respectively connected with one end of the fifth resistor and the first end of the second transistor, 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 frequency tracking circuit;
the other end of the second inductor is grounded through the sixth capacitor.
In an optional implementation manner, the other end of the second inductor is further connected to the first stage boost driving circuit, and is configured to input a boosted supply voltage;
and the second end of the second transistor is also connected with the protection unit and is used for inputting the secondary boosted power supply voltage to the protection unit so as to drive the atomization sheet to work.
In an optional embodiment, the protection unit includes a first filter circuit, a second filter circuit, a third diode, and a seventh capacitor;
the atomization sheet is connected with the first filter circuit through a first pin and is grounded through the seventh capacitor; the atomization sheet is grounded through a second pin;
the first filter circuit is respectively connected with one end of the third diode, the second filter circuit and the second-stage boosting drive circuit;
the other end of the third diode is connected with the third filter circuit.
In an optional implementation manner, the atomization plate driving module further includes a controller, and the controller is respectively connected to the first-stage boost driving circuit, the second-stage boost driving circuit, the sweep frequency tracking circuit, and the water shortage detection circuit.
In an optional embodiment, the sweep tracking circuit includes a fourth filter circuit, a fourth diode, and a fifth filter circuit;
the fourth filter circuit is respectively connected with the fourth diode and the fifth filter circuit and is used for receiving a first analog-to-digital conversion signal from the controller;
the fifth filter circuit is also connected with the second-stage boosting drive circuit.
In an alternative embodiment, the water shortage detection circuit comprises a sixth filter circuit and a sixth resistor;
the sixth filter circuit is connected with a power supply end through the sixth resistor and is used for receiving a second analog-to-digital conversion signal from the controller;
the sixth filter circuit is further connected with the fourth diode.
The embodiment of the utility model provides a following beneficial effect has:
the embodiment of the utility model provides an energy-saving atomization sheet driving module device, which comprises a metal shielding cover, a printed circuit board and an atomization sheet driving module; the printed circuit board is provided with an atomizing sheet driving module and a metal shielding cover, and the atomizing sheet driving module is used for realizing the driving of an external atomizing sheet; the atomization sheet driving module comprises a two-stage boosting driving circuit, a frequency sweeping tracking circuit and a water shortage detection circuit; the atomization sheet driving module is positioned in a shielding space formed between the printed circuit board and the metal shielding case. The embodiment of the utility model provides an through the integrated mode of modularization, integrate two-stage boost drive circuit, sweep frequency tracking circuit, lack of water detection circuit into atomizing piece drive module; moreover, a communication protocol adopted when the atomizing sheet driving module is in communication connection with external equipment can be correspondingly set according to requirements, so that the communication protocol is universal, and the communication protocol is simple and easy to develop and apply, and further, the energy-saving atomizing sheet driving module device can be flexibly applied to various products or equipment due to the modularized integration process and the simple communication protocol, so that the development efficiency is improved, and the development cost, the production cost and the development difficulty are effectively reduced; the atomization plate is driven to work by the two-stage boosting driving circuit, and the sweep frequency tracking of the resonant frequency of the atomization plate is realized by the sweep frequency tracking circuit, so that the atomization plate works at the optimal frequency point and works in a constant power state, the working efficiency of the atomization plate is improved, and the sweep frequency accuracy of the resonant frequency is effectively improved by the independent sweep frequency tracking circuit; the independent water shortage detection circuit detects water shortage, effectively improves the accuracy of water shortage detection of the atomizing plate, and enables the atomizing plate to accurately detect the dry burning state of the low-power atomizing plate. In addition, the metal shielding cover has the functions of isolating signal radiation interference and dissipating heat, so that the energy-saving atomization plate driving module device can be better applied to actual scenes.
Drawings
In order to illustrate the technical solution of the present invention more clearly, the drawings that are needed in the embodiments will be briefly described below, and it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope of the present invention. Like components are numbered similarly in the various figures.
Fig. 1a shows a first schematic structural diagram of an energy-saving atomizing sheet driving module device in an embodiment of the present invention;
fig. 1b shows a second schematic structural diagram of an energy-saving atomizing sheet driving module device in an embodiment of the present invention;
fig. 2 shows a first schematic structural diagram of an atomizing plate driving module according to an embodiment of the present invention;
fig. 3 shows a schematic structural diagram of the first stage boost driving circuit in the embodiment of the present invention;
fig. 4 shows a second schematic structural diagram of the atomization plate driving module in the embodiment of the present invention.
Description of the main element symbols:
100-a metal shield; 200-a printed circuit board; 300-an atomizing sheet driving module; 310-first stage boost driver circuit; 320-a second stage boost drive circuit; 321-an oscillating unit; 322-a protection unit; 330-sweep frequency tracking circuit; 340-water shortage detection circuit.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
Hereinafter, the terms "including", "having", and their derivatives, which may be used in various embodiments of the present invention, are only intended to indicate specific features, numbers, steps, operations, elements, components, or combinations of the foregoing, and should not be construed as first excluding the existence of, or adding to, one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
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 invention belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in various embodiments of the present invention.
Example 1
As shown in fig. 1a, fig. 1b, and fig. 2, an embodiment of the present invention provides an energy-saving atomization sheet driving module device, which includes a metal shielding cover 100, a printed circuit board 200, and an atomization sheet driving module 300.
The printed circuit board 200 is provided with an atomizing sheet driving module 300 and a metal shielding case 100; the atomization plate driving module 300 is located in a shielding space formed between the printed circuit board 200 and the metal shielding case 100. Optionally, the metal shielding can 100 and the printed circuit board 200 may be fastened by any one of a cover fastener, a solder, and a solder cover fastener, and preferably, the metal shielding can 100 is soldered to the printed circuit board 200.
It is understood that the atomization plate driving module 300 is used for driving the atomization plate; in one embodiment, the atomization sheet driving module 300 includes a controller (not shown), a two-stage boost driving circuit (a first stage boost driving circuit 310, a second stage boost driving circuit 320), a sweep tracking circuit 330, and a water shortage detection circuit 340.
The controller is used for being connected with an external main controller to receive a control signal of the main controller, and sending corresponding signals to each circuit in the atomizing sheet driving module 300 according to the control signal, wherein the corresponding signals include a boost control signal, an oscillation signal, an analog-to-digital conversion signal and the like, and then controlling the on-off of each circuit through the corresponding signals to realize corresponding functions. Optionally, the controller may be an MCU chip, a microcontroller, or the like.
The embodiment of the utility model provides a through the integrated mode of modularization, with controller, two-stage boost drive circuit, sweep frequency tracking circuit 330, lack of water detection circuitry 340 with integrated for atomizing piece drive module 300 to set up this atomizing piece drive module 300 on printed circuit board 200.
The atomization plate driving module 300 is used for externally connecting external equipment or an atomization plate MIST, and establishes communication connection with an externally connected main controller through a controller so as to correspondingly control the on-off of each circuit in the atomization plate driving module 300 and correspondingly realize the driving of the externally connected atomization plate MIST or the water shortage detection; the external device is various products or devices containing the atomizing sheet MIST, such as an aromatherapy machine, a humidifier, an atomizer and the like. Moreover, the communication protocol adopted when the atomization sheet driving module 300 is in communication connection with external equipment can be correspondingly set according to requirements, so that the communication protocol is simpler and is easy to develop and apply, the atomization sheet MIST driving device can be flexibly applied to various products or equipment, the communication protocol and a driving control program do not need to be developed again in the application process, the development difficulty is reduced, the development cost is reduced, and the development efficiency is improved.
The embodiment of the utility model provides an atomizing piece MIST drive arrangement, through increasing metallic shield cover 100, can effectively restrain the signal and the radiation interference in the space, convenient follow-up electromagnetic radiation carries out the interference killing feature test to this atomizing piece drive module 300 through, the debugging degree of difficulty of greatly reduced atomizing piece MIST drive arrangement in the aspect of EMC (the interference size and the interference killing feature in the aspect of the electromagnetism). In addition, the metal shielding case 100 also has a heat dissipation function, and specifically, the metal shielding case 100 can increase a heat dissipation area by connecting the printed circuit board 200; and the inductance components integrated on the printed circuit board 200 are connected with the inner side of the metal shielding case 100, and the heat-conducting silicone grease on the metal shielding case 100 can connect the inductance components with the printed circuit board 200 and the components thereof, so that the heat dissipation capability is correspondingly improved.
As shown in fig. 2 to fig. 4, an embodiment of the present invention provides an atomization plate driving module 300, which includes a two-stage boosting driving circuit, a frequency sweep tracking circuit 330, and a water shortage detection circuit 340. The two-stage boost driving circuit includes a first stage boost driving circuit 310 and a second stage boost driving circuit 320.
In this embodiment, the first stage Boost driving circuit 310 is configured to Boost a supply Voltage (VBAT) input by the external battery after receiving a Boost control signal (Boost _ PWM) input by the controller, for example, to a voltage value of (25 ± 1) V.
The second-stage boost driving circuit 320 is configured to boost the power supply Voltage (VCC) boosted by the first-stage boost driving circuit 310 for the second time after receiving the oscillation signal (miss _ PWM) input by the controller, that is, amplify the 25V power supply voltage boosted by the first-stage boost driving circuit 310 by about 2.7 times, so as to drive the external atomizing sheet miss to operate based on the power supply voltage boosted for the second time, so that the atomizing sheet miss generates resonance.
The sweep frequency tracking circuit 330 is configured to sample a first current flowing through the atomizing sheet MIST (or sample a voltage value flowing through the atomizing sheet MIST) during an operation of the atomizing sheet MIST, and perform analog-to-digital conversion on the first current after receiving a first analog-to-digital conversion signal of the controller, so that the controller adjusts a resonant frequency of the atomizing sheet MIST based on the converted first current, the boost control signal, and a duty ratio of the oscillation signal, that is, track a current value flowing through the atomizing sheet MIST to continuously fine-tune a frequency of the oscillation signal output by the controller, and further adjust a boost value of the supply voltage, so that the atomizing sheet MIST operates at an optimal frequency point under driving of the boosted supply voltage.
Specifically, when the oscillation signal of the second stage boost driving circuit 320 causes the atomization sheet MIST to oscillate (resonate) to break up the liquid water molecule structure to generate naturally flowing atomized water; the controller samples the current value flowing through the atomizing sheet MIST through the sweep tracking circuit 330, and the sweep tracking circuit 330 sends the sampled first current to the controller after analog-to-digital conversion, so that the controller outputs a new boost control signal and an oscillation signal through the sampled first current to continuously adjust the frequency of the corresponding signal 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 resonant frequency of the atomizing sheet MIST, and further the supply current (or supply voltage) in the atomizing sheet driving module 300 reaches the working current (or working voltage) of the atomizing sheet MIST; the operating current of the atomizing sheet MIST can be set according to actual conditions, and is not limited herein.
The water shortage detection circuit 340 is used for realizing the water shortage detection of the atomizing sheet MIST through the reverse conduction characteristic of the diode in the frequency sweep tracking circuit 330.
Specifically, the controller determines whether the current atomizing sheet MIST is lack of water or not through the change of the current value flowing through the atomizing sheet MIST sampled by the water shortage detection circuit 340, so as to realize water shortage detection; specifically, the water shortage detection is realized by sampling the level state corresponding to the current value flowing through the atomizing sheet MIST, and if the current value becomes small and the corresponding level state is low level, it indicates that the current atomizing sheet is in the water shortage state. Furthermore, external software or external equipment can determine whether the current atomizing plate is in a water shortage state or not through the level state of the level signal output by the energy-saving atomizing plate driving module device, namely when the level signal is at a low level, the atomizing plate is in the water shortage state currently.
Furthermore, the sweep tracking circuit 330 and the water shortage detection circuit 340 respectively perform current sampling, and perform analog-to-digital conversion on the sampled current value to convert the sampled current value into a corresponding digital signal and transmit the digital signal to the controller, so that the controller adjusts the frequency of the boost control signal and the oscillation signal output to the atomizing sheet driving module 300 according to the sampled current value, and performs water shortage detection according to the change of the sampled current value.
In this embodiment, when the atomizing sheet MIST is operating normally, the voltage across the atomizing sheet MIST is stabilized in a normal range, and the change is not large, that is, the change of the current value flowing through the atomizing sheet MIST is stable; if the amount of water is reduced to a certain degree or if there is no water, the current at the two ends of the atomizing sheet MIST changes, that is, if the current atomizing sheet MIST lacks water when the atomizing sheet MIST is in operation, the current value flowing through the atomizing sheet MIST changes, so that whether the current atomizing sheet MIST lacks water is determined according to the change rule. In the present embodiment, the types of the case where the atomizing sheet MIST lacks water include the case where the amount of water is reduced to a certain degree, no water, and the amount of water is below a predetermined threshold value.
Exemplarily, the first stage boost driving circuit 310 includes first to fifth capacitors, first to third resistors, first to second diodes, a first inductor L1, and a first transistor Q1.
In one embodiment, the first resistor R1 is connected to the second resistor R2 and the first end of the first transistor Q1, respectively, and is configured to receive a boost control signal from the controller; the second end of the second resistor R2 and the second end of the first transistor Q1 are both grounded; the first parallel ends of the first capacitor C1, the second capacitor C2 and the first diode D1 are connected with the second end of the first transistor Q1; the first capacitor C1, the second capacitor C2 and the second parallel end of the first diode D1 are connected to one end (cathode) of the second diode D2, and are used for outputting the boosted supply voltage; the other end (anode) of the second diode D2 is connected to the third end of the first transistor Q1, one end of the third capacitor C3, and one end of the first inductor L1 (e.g., L1 in fig. 2), respectively; the first parallel ends of the fourth capacitor C4 (e.g., C12 in fig. 2) and the fifth capacitor C5 are connected to the other end of the first inductor L1; the first parallel end of the fourth capacitor and the fifth capacitor C5 is also used for accessing a working mode special pin (VBAT) of an external battery to input a supply voltage; second parallel ends of the fourth capacitor C4 and the fifth capacitor C5 are connected with one end of the third resistor R3; the second parallel ends of the fourth capacitor C4 and the fifth capacitor C5 are also used for grounding. The other end of the third resistor R3 is connected to the other end of the third capacitor C3. The first stage boost driver circuit 310 is used to boost the supply voltage.
Exemplarily, the first transistor Q1 is an NMOS transistor, for example, an NMOS transistor with a model number of a 03400; 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 grid electrode of the first transistor Q1 is respectively connected with the first resistor R1 and the second resistor R2; the source of the first transistor Q1 is grounded.
In one embodiment, the second stage boost driving circuit 320 includes an oscillating unit 321 and a protection unit 322 connected; the oscillating unit 321 is configured to boost the supply voltage output by the first-stage boost driving circuit for the second time; the protection unit 322 is used to protect the atomization sheet MIST from overvoltage.
Exemplarily, the oscillating unit 321 includes a fourth resistor R4, a fifth resistor R5, a second transistor Q2, a second inductor L2, and a sixth capacitor C6.
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, for receiving the oscillation signal (miss _ 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 sweep frequency tracking circuit 330; the other end of the second inductor L2 is grounded through a sixth capacitor C6. The other end of the second inductor L2 is further connected to the first stage boost driving circuit 310, and is configured to input the boosted supply voltage; the second end of the second transistor Q2 is further connected to the protection unit 322, and is configured to input the secondarily boosted supply voltage to the atomizing sheet MIST to drive the atomizing sheet MIST to operate.
Exemplarily, the second transistor Q2 is an NMOS transistor, such as an NMOS transistor with a model number a 03400. Furthermore, the drain of the second transistor Q2 is connected to the second inductor L2 and the protection unit 322, respectively; the grid electrode of the second transistor Q2 is respectively connected with a fourth resistor R4 and a fifth resistor R5; the source of the second transistor Q2 is connected to the sweep tracking circuit 330.
The second stage boost driving circuit 320 is connected to the first stage boost driving circuit 310, and is configured to boost the boosted supply voltage output by the first stage boost driving circuit 310 for the second time, and drive the external atomizing sheet mistt to operate.
Exemplarily, the sweep tracking circuit 330 includes a fourth filter circuit, a fourth diode D4, and a fifth filter circuit; the fourth filter circuit is respectively connected with the fourth diode D4 and the fifth filter circuit and is used for receiving the first analog-to-digital conversion signal (MIST _ AD 1) from the controller; the fifth filter circuit is further connected to the second stage boost driving circuit 320. Optionally, the fourth filter circuit and the fifth filter circuit are both RC filter circuits, and are configured to provide a filtering protection function for the circuit.
Exemplarily, the fourth filter circuit includes an eighth capacitor C8 and a seventh resistor R7, the fifth filter circuit includes a ninth capacitor C9 and an eighth resistor R8, one end of the seventh resistor R7 is connected to the controller, the other end of the seventh resistor R7 is connected to one end of the eighth capacitor C8, one end of 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 between the seventh resistor R7 and the eighth resistor R8 in parallel. The eighth resistor R8 is used as a sampling resistor to sample the first current and the second current in the circuit.
The water shortage detection circuit 340 is configured to sample a second current flowing through the atomizing sheet MIST (or sample a voltage value flowing through the atomizing sheet MIST), and perform analog-to-digital conversion processing on the second current after receiving a second analog-to-digital conversion signal of the controller, so that the controller realizes water shortage detection on the atomizing sheet MIST based on the converted second current.
Exemplarily, the water shortage detection circuit 340 includes a sixth filter circuit and a sixth resistor R6; the sixth filtering circuit is connected with a power supply end (5V reference power supply end) through a sixth resistor R6 and is used for receiving a second analog-to-digital conversion signal (MIST _ AD 2) from the controller; the sixth filter circuit is also connected to a fourth diode D4.
Exemplarily, the sixth filter circuit includes a tenth capacitor C10 and a ninth resistor R9, the tenth capacitor C10 is connected in parallel with the ninth resistor R9, first parallel ends of the tenth capacitor C10 and the ninth capacitor C9 are respectively connected to the fourth diode D4 and the sixth resistor R6, and second parallel ends of the tenth capacitor C10 and the ninth resistor R9 are grounded.
It should be noted that the sixth resistor R6 and the ninth resistor R9 each serve as a voltage dividing resistor for providing a reference current value or a reference voltage value, which can be set according to actual conditions. Through the reverse conduction characteristic of the fourth diode D4 in the frequency sweep tracking circuit 330, when the atomizing sheet MIST is in water shortage, the working voltage value corresponding to the current value flowing through the atomizing sheet MIST sampled by the frequency sweep tracking circuit 330 (i.e. the current working voltage value of the atomizing sheet driving module) is smaller than the reference voltage value in the water shortage detection circuit 340, and then the fourth diode D4 is in reverse conduction, i.e. the tenth capacitor C10, the ninth resistor R9 and the sixth resistor R6 are connected to the atomizing sheet driving module 300, so that at this time, the current value (or voltage value) flowing through the atomizing sheet MIST sampled by the sampling resistor (the eighth resistor R8) changes (i.e. the current value is smaller than the reference current value), i.e. the current atomizing sheet MIST is declared to be in water shortage, and thus the water shortage detection can be realized according to the change of the sampled current value; under this lack of water detection mode, need not touch the spring, improved lack of water detection efficiency and degree of accuracy. Furthermore, in the case of setting the reference voltage value, the water shortage detection of the atomizing sheet MIST with a small power of more than 2W can be realized.
In the embodiment, the voltage value of the sampled flow through the atomizing sheet MIST is compared with the reference voltage value so as to realize the water shortage detection of the current atomizing sheet MIST, and the circuit structure improves the water shortage detection accuracy of the atomizing sheet MIST in a dry-burning state under the power of 2W-5W.
The protection unit 322 includes a first filter circuit, a second filter circuit, a third diode D3, and a seventh capacitor C7; the atomization sheet MIST is connected with the first filter circuit through a first pin and is grounded through a seventh capacitor C7; the atomization sheet MIST is grounded through a second pin; the first filter circuit is respectively connected with 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 a third filter circuit.
Exemplarily, the third to fourth filter circuits are all RC circuits, wherein the first filter circuit includes an eleventh capacitor C11 and a tenth resistor R10; the second filter circuit comprises a twelfth capacitor C12 and an eleventh resistor R11; the third filter circuit includes a thirteenth capacitor C13 and a twelfth resistor R12.
Furthermore, an eleventh capacitor C11 is connected in series with a tenth resistor R10, the tenth resistor R10 is connected with the first pin of the atomizing sheet MIST, and the eleventh capacitor C11 is respectively connected with the anode of the third diode D3, the twelfth capacitor C12 and the second-stage boost driving circuit 320; the twelfth capacitor C12 is connected with the eleventh resistor R11 in series and then grounded; the cathode of the third diode D3 is connected to the first parallel terminals of the thirteenth capacitor C13 and the twelfth resistor R12, and the second parallel terminals of the thirteenth capacitor C13 and the twelfth resistor R12 are grounded.
In addition, the controller controls the oscillation signal (for example, the oscillation signal with the frequency of 2.4M) to be intermittently output in a preset period, so as to periodically drive the atomizing sheet MIST to operate, so that the atomizing sheet MIST operates intermittently, wherein the preset period is not limited herein. When the controller outputs an oscillation signal to the second stage boost driving circuit 320, the eighth capacitor C8 is simultaneously used for charging and storing energy; when the controller outputs the oscillation signal to the second stage boost driving circuit 320, the eighth capacitor C8 is used for discharging; therefore, in the embodiment, the power of the input oscillation signal is constant by storing energy through the eighth capacitor C8, the working energy of the atomizing sheet MIST is ensured, that is, the atomizing sheet MIST can work normally, and the working efficiency is improved; and further the service life of the atomizing sheet MIST in intermittent operation is prolonged.
The embodiment of the utility model provides an output oscillating signal through two-stage boost drive circuit intermittent type to the work of atomizing piece MIST constant power is controlled to the indirect, thereby promotes atomizing piece MIST work efficiency; the current flowing through the atomizing sheet MIST is sampled by the two-stage analog-to-digital conversion circuit and is compared with the set reference current value, so that the water shortage detection of the atomizing sheet MIST under normal work is realized, and the accuracy of the water shortage detection of the atomizing sheet under the dry burning state is improved.
The embodiment of the utility model provides an each part accessible module integrates in the atomizing piece drive module 300 and realizes, and atomizing piece drive module 300, atomizing piece drive module 300 internal circuit, communication protocol between external equipment (or product) is simple to improved the application flexibility ratio, and to the product that has this same atomizing piece drive module 300, its circuit structure, communication protocol and function program need not develop once more, thereby reduce the development degree of difficulty, reduce development cost and improve development efficiency.
In all examples shown and described herein, any particular value should be construed as merely exemplary, and not as a limitation, and thus other examples of example embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above-described embodiments are merely illustrative of several embodiments of the present invention, which are described in detail and specific, but not intended to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (10)
1. An energy-saving atomization sheet driving module device is characterized by comprising a metal shielding cover, a printed circuit board and an atomization sheet driving module;
the printed circuit board is provided with the atomizing sheet driving module and the metal shielding case, and the atomizing sheet driving module is used for driving an external atomizing sheet; the atomization plate driving module comprises a two-stage boosting driving circuit, a frequency sweep tracking circuit and a water shortage detection circuit;
the atomization piece driving module is positioned in a shielding space formed between the printed circuit board and the metal shielding case.
2. The energy-saving atomization sheet driving module device as claimed in claim 1, wherein the two-stage boost driving circuit comprises a first stage boost driving circuit and a second stage boost driving circuit which are connected;
the first stage boosting drive circuit boosts the power supply voltage;
and the second-stage boosting drive circuit is connected with the first-stage boosting drive circuit and is used for boosting the boosted power supply voltage output by the first-stage boosting drive circuit for the second time, so that the atomization sheet is driven.
3. The energy-saving atomization plate driving module device of claim 2, wherein 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;
the first resistor is respectively connected with the second resistor and the first end of the first transistor; a second terminal of the second resistor and a second terminal of the first transistor are both grounded;
the first parallel ends of the first capacitor, the second capacitor and the first diode are connected with the second end of the first transistor; the first capacitor, the second capacitor and a second parallel end of the first diode are connected with one end of a second diode and used for outputting boosted power supply voltage;
the other end of the second diode is respectively connected with a third end of the first transistor, one end of a third capacitor and one end of the first inductor;
the first parallel end of the fourth capacitor and the first parallel end of the fifth capacitor are connected with the other end of the first inductor; second parallel ends of the fourth capacitor and the fifth capacitor are connected with one end of a third resistor;
the other end of the third resistor is connected with the other end of the third capacitor.
4. The energy-saving atomization plate driving module device of claim 2, wherein the second-stage boost driving circuit comprises a protection unit and an oscillation unit which are connected;
the oscillating unit is used for carrying out secondary boosting on the power supply voltage;
the protection unit is used for carrying out overvoltage protection on the atomizing sheet.
5. The energy-saving atomization plate driving module device of claim 4, wherein the oscillating unit comprises a fourth resistor, a fifth resistor, a second transistor, a second inductor and a sixth capacitor;
the fourth resistor is respectively connected with one end of the fifth resistor and the first end of the second transistor, 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 frequency tracking circuit;
the other end of the second inductor is grounded through the sixth capacitor.
6. The energy-saving atomization sheet driving module device according to claim 5, wherein the other end of the second inductor is further connected to the first stage boost driving circuit, and is configured to input a boosted supply voltage;
and the second end of the second transistor is also connected with the protection unit and is used for inputting the secondary boosted power supply voltage to the protection unit so as to drive the atomization sheet to work.
7. The energy-saving atomization plate driving module device of claim 4, wherein the protection unit comprises a first filter circuit, a second filter circuit, a third diode and a seventh capacitor;
the atomization piece is connected with the first filter circuit through a first pin and is grounded through the seventh capacitor; the atomization sheet is grounded through a second pin;
the first filter circuit is respectively connected with one end of the third diode, the second filter circuit and the second-stage boosting drive circuit;
and the other end of the third diode is connected with the third filter circuit.
8. The energy-saving atomization plate driving module device of claim 2, wherein the atomization plate driving module further comprises a controller, and the controller is respectively 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.
9. The energy-saving atomization plate driving module device according to claim 2 or 8, wherein the frequency sweep tracking circuit comprises a fourth filter circuit, a fourth diode and a fifth filter circuit;
the fourth filter circuit is respectively connected with the fourth diode and the fifth filter circuit;
the fifth filter circuit is also connected with the second-stage boosting drive circuit.
10. The energy-saving atomization sheet driving module device of claim 9, wherein the water shortage detection circuit comprises a sixth filter circuit and a sixth resistor;
the sixth filter circuit is connected with a power supply end through the sixth resistor;
the sixth filter circuit is further connected with the fourth diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223239161.5U CN218775045U (en) | 2022-12-01 | 2022-12-01 | Energy-saving atomization sheet driving module device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223239161.5U CN218775045U (en) | 2022-12-01 | 2022-12-01 | Energy-saving atomization sheet driving module device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218775045U true CN218775045U (en) | 2023-03-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223239161.5U Active CN218775045U (en) | 2022-12-01 | 2022-12-01 | Energy-saving atomization sheet driving module device |
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| Country | Link |
|---|---|
| CN (1) | CN218775045U (en) |
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2022
- 2022-12-01 CN CN202223239161.5U patent/CN218775045U/en active Active
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