Voltage control circuit, voltage control method, air conditioning device, and storage medium

Abstract

The present application provides a voltage control circuit, a voltage control method, an air conditioning device, and a storage medium. The voltage control circuit comprises a voltage boost module (100), a signal generation module (200), a stepless voltage regulation module (300), and an inverter module (400). The voltage boost module (100) is used for regulating an input voltage to obtain an initial output voltage; the signal generation module (200) is used for outputting a waveform signal and regulating a duty ratio of the waveform signal; the stepless voltage regulation module (300) is used for performing stepless voltage regulation processing on the initial output voltage on the basis of the duty ratio of the waveform signal to obtain a target output voltage; and the inverter module (400) has an input side connected to an output end of the voltage boost module (100), and an output side used for outputting an alternating-current voltage to a piezoelectric load, such that the piezoelectric load vibrates at the alternating-current voltage.

Description

Voltage control circuit and voltage control method, air conditioning equipment and storage medium

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application number 202311104633.2, filed on August 29, 2023, entitled “Voltage control circuit and voltage control method, air conditioning equipment and storage medium”, and application number 202322341812.X, filed on August 29, 2023, entitled “Voltage control circuit and air conditioning equipment”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the technical field of air conditioners, and in particular to a voltage control circuit and a voltage control method, an air conditioning device, and a storage medium. Background Art

[0004] At present, in the relevant technology, the existing air-conditioning indoor unit mainly uses a stepper motor to drive the swing fan blades to change the air outlet direction of the air outlet and adjust the distribution of the wind field. However, the air outlet of the current air outlet is still relatively strong, and the wind feeling cannot be adjusted. Users are prone to feel uncomfortable and the experience is poor.

[0005] In response to this, some air-conditioning indoor units use piezoelectric resonance to achieve active wind field control. In the application scenario of dynamic adjustment, the step-by-step adjustment method is low-cost and simple to control; however, since this solution is hard-on and hard-off, problems such as voltage and current fluctuations will occur during the switching process, which in turn leads to a deterioration in the dynamic control effect of the active wind field.

[0006] Summary of the Invention

[0007] The present application aims to at least partially solve one of the technical problems existing in the prior art. To this end, the present application proposes a voltage control circuit and a voltage control method, an air conditioning device, and a storage medium.

[0008] In the first aspect, an embodiment of the present application provides a voltage control circuit, comprising: a voltage boosting module, for regulating the input voltage to obtain an initial output voltage; a signal generating module, for outputting a waveform signal and adjusting the duty cycle of the waveform signal; a stepless voltage regulating module, connected between the output end of the signal generating module and the voltage boosting module, for performing stepless voltage regulation on the initial output voltage according to the duty cycle of the waveform signal to obtain a target output voltage; an inverter module, the input side of which is connected to the output end of the voltage boosting module, and the output side of which is used to output an AC voltage to a piezoelectric load so that the piezoelectric load vibrates under the AC voltage.

[0009] According to some embodiments of the present application, the stepless voltage regulation module includes an integration circuit unit, a voltage following unit and a current regulation unit, the voltage input end of the voltage following unit is connected to the signal generating module through the integration circuit unit, and the voltage output end of the voltage following unit is connected to the voltage boosting module through the current regulation unit.

[0010] According to some embodiments of the present application, the voltage follower unit includes one of the following: a first operational amplifier, the voltage input terminal of the first operational amplifier is connected to the integration circuit unit, the voltage output terminal and the voltage feedback terminal of the first operational amplifier are connected, and are connected to the current regulation unit; an isolation chip, the voltage input terminal of the isolation chip is connected to the integration circuit unit, and the voltage output terminal of the isolation chip is connected to the current regulation unit.

[0011] According to some embodiments of the present application, the current regulating unit includes a first resistor, a second resistor and a third resistor, one end of the first resistor is connected to the output end of the voltage boosting module, and the other end is connected to the ground end through the second resistor, and the common end of the first resistor and the second resistor is also connected to the voltage output end of the voltage following unit through the third resistor.

[0012] According to some embodiments of the present application, the integration circuit unit includes a fourth resistor and a first capacitor, one end of the fourth resistor is connected to the output end of the signal generating module, and the other end is connected to the ground end through the first capacitor, and the common end of the fourth resistor and the first capacitor is also connected to the voltage input end of the voltage follower unit.

[0013] According to some embodiments of the present application, the signal generating module includes one of the following: a controller for outputting a square wave signal and directly adjusting the duty cycle of the square wave signal; a square wave generating circuit for outputting a square wave signal to the stepless voltage regulation module, and the square wave generating circuit includes an adjustable resistor for adjusting the duty cycle of the square wave signal.

[0014] According to some embodiments of the present application, when the signal generating module includes a square wave generating circuit, the square wave generating circuit also includes a second operational amplifier, an energy storage capacitor, a fifth resistor and a sixth resistor, one end of the energy storage capacitor is connected to a voltage input terminal of the second operational amplifier, and is also connected to the voltage output terminal of the second operational amplifier through the adjustable resistor, the voltage output terminal of the second operational amplifier is connected to the ground terminal through the fifth resistor and the sixth resistor, and the common end of the fifth resistor and the sixth resistor is connected to another voltage input terminal of the second operational amplifier.

[0015] According to some embodiments of the present application, the voltage boost module includes a boost chip and a peripheral boost circuit, the peripheral boost circuit includes a boost switch tube, a first inductor and a boost capacitor, the first inductor is connected to the boost switch tube and the boost capacitor respectively, the boost chip is connected to the control end of the boost switch tube and is used to control the conduction or shutdown of the boost switch tube, when the boost switch tube is turned on, the first inductor is charged; when the boost switch tube is turned off, the first inductor is discharged and the boost capacitor is charged; the boost capacitor is used to supply power to the inverter module.

[0016] According to some embodiments of the present application, the inverter module includes a pulse cluster generating and amplifying unit and a coupling unit. The pulse cluster generating and amplifying unit is connected to the output end of the voltage boosting module, and is used to generate a pulse cluster signal, and perform signal amplification processing on the pulse cluster signal according to the target output voltage to obtain a high-voltage pulse cluster signal, wherein the amplitude of the high-voltage pulse cluster signal is the target output voltage; the coupling unit is connected to the output end of the pulse cluster generating and amplifying unit, and is used to filter and transform the high-voltage pulse cluster signal to couple and form a full-cycle sinusoidal AC voltage.

[0017] According to some embodiments of the present application, the pulse cluster generating amplification unit includes a driving circuit, a first switching amplification branch and a second switching amplification branch, the driving circuit is connected to the first switching amplification branch and the second switching amplification branch, respectively, the first switching amplification branch is used to output a first DC voltage signal, and the second switching amplification branch is used to output a second DC voltage signal, wherein a 180° phase difference is formed between the first DC voltage signal and the second DC voltage signal.

[0018] According to some embodiments of the present application, the coupling unit includes a first filtering branch and a second filtering branch, the first filtering branch is connected to the first switching amplifier branch, and the second filtering branch is connected to the second switching amplifier branch, and the coupling unit is used to obtain a full-cycle AC voltage signal according to the coupling of the first DC voltage signal and the second DC voltage signal.

[0019] In a second aspect, an embodiment of the present application provides an air conditioning device, comprising a piezoelectric load and a voltage control circuit as described in the first aspect, wherein the piezoelectric load is arranged at the air outlet of the air conditioning device, and the voltage control circuit is connected to the piezoelectric load.

[0020] In a third aspect, an embodiment of the present application provides a voltage control method, which is applied to the voltage control circuit as described in the first aspect, and the control method includes: receiving a voltage regulation instruction, and determining the corresponding target output voltage according to the voltage regulation instruction; determining a target duty cycle according to the target output voltage and the initial output voltage; outputting a waveform signal of the target duty cycle to the stepless voltage regulation module through the signal generation module; and performing stepless voltage regulation on the initial output voltage based on the waveform signal through the stepless voltage regulation module, so that the initial output voltage is adjusted to the target output voltage.

[0021] According to some embodiments of the present application, the outputting of the waveform signal of the target duty cycle to the stepless voltage regulation module through the signal generating module includes one of the following: when the signal generating module is a controller, the waveform signal of the target duty cycle is directly output to the stepless voltage regulation module through the controller; when the signal generating module is a square wave generating circuit and the square wave generating circuit includes an adjustable resistor, the waveform signal of the target duty cycle is output to the stepless voltage regulation module by adjusting the resistance value of the adjustable resistor.

[0022] According to some embodiments of the present application, one voltage adjustment instruction corresponds to one time adjustment step and one duty cycle adjustment step.

[0023] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are used to execute the voltage control method as described in the third aspect.

[0024] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0026] FIG1 is a schematic diagram of a circuit structure of a voltage control circuit provided in one embodiment of the present application;

[0027] FIG2 is a schematic diagram of the circuit structure of a voltage control circuit provided in another embodiment of the present application;

[0028] FIG3 is a schematic diagram of the circuit structure of a voltage control circuit provided in another embodiment of the present application;

[0029] FIG4 is a schematic diagram of the circuit structure of a voltage control circuit provided in another embodiment of the present application;

[0030] FIG5 is a schematic structural diagram of an air conditioning device provided by one embodiment of the present application;

[0031] FIG6 is a schematic structural diagram of a piezoelectric load provided in one embodiment of the present application;

[0032] FIG7 is a schematic diagram of a system architecture platform for executing a voltage control method provided by one embodiment of the present application;

[0033] FIG8 is a flow chart of a voltage control method provided by one embodiment of the present application;

[0034] FIG9 is a specific flow chart of step S130 of the voltage control method provided in the embodiment of FIG8 ;

[0035] FIG10 is another specific flow chart of step S130 of the voltage control method provided in the embodiment of FIG8 ;

[0036] FIG11 is a control logic flow chart of a stepless voltage regulation module provided by one embodiment of the present application;

[0037] FIG12 is a block diagram of different voltage regulation instructions provided by one embodiment of the present application; and

[0038] FIG13 is a control logic flow chart of a stepless voltage regulation module provided in another embodiment of the present application. DETAILED DESCRIPTION

[0039] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0040] In the description of this application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the circuits or components referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0041] In the description of this application, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The terms "first" and "second" are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or as implicitly specifying the number or order of the technical features indicated.

[0042] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0043] In some cases, for general air-conditioning equipment, the wind direction is generally adjusted by setting swinging fan blades at the air outlet, and the swinging fan blades are generally driven by a stepper motor. However, it can only control the wind direction of the air outlet by driving the swinging fan blades, and cannot change the wind feeling of the air outlet. The wind output is particularly strong, which can easily cause a bad experience for users.

[0044] In this regard, some air-conditioning equipment uses piezoelectric resonance to control the active wind farm. In the application scenario of dynamic adjustment, the step-by-step adjustment method is low-cost and simple to control; however, since this solution is hard-on and hard-off, problems such as voltage and current fluctuations will occur during the switching process, which in turn leads to a deterioration in the dynamic control effect of the active wind farm.

[0045] Based on the above situation, the embodiments of the present application propose a voltage control circuit and a voltage control method, an air conditioning device and a storage medium, aiming to improve the dynamic control effect of an active wind farm.

[0046] The embodiments of the present application are further described below with reference to the accompanying drawings.

[0047] As shown in FIG1 , FIG1 is a schematic diagram of the circuit structure of a voltage control circuit provided in one embodiment of the present application.

[0048] In one embodiment, an embodiment of the present application provides a voltage control circuit, which includes but is not limited to a voltage boosting module 100 , a signal generating module 200 , a stepless voltage regulating module 300 , and an inverter module 400 .

[0049] Specifically, the voltage boost module 100 is used to regulate the input voltage to obtain an initial output voltage.

[0050] Furthermore, the signal generating module 200 is used to receive a voltage regulation instruction, determine the corresponding target output voltage according to the voltage regulation instruction, and adjust the duty cycle of the waveform signal according to the size of the target output voltage and the initial output voltage, and output the waveform signal of the target duty cycle to the stepless voltage regulation module 300.

[0051] Furthermore, the stepless voltage regulation module 300 is connected between the output end of the signal generating module 200 and the voltage boosting module 100 and is used to perform stepless voltage regulation on the initial output voltage according to the duty cycle of the waveform signal to obtain a target output voltage.

[0052] Furthermore, the input side of the inverter module 400 is connected to the output of the voltage boost module 100. The output side is used to output an AC voltage to the piezoelectric load 500, so that the piezoelectric load 500 vibrates with a corresponding amplitude according to the corresponding AC voltage, achieving stepless regulation. One voltage regulation instruction corresponds to one time adjustment step and one duty cycle adjustment step.

[0053] The embodiment of the present application can add a piezoelectric load 500 to the air outlet of the air-conditioning equipment, and use the vibration of the piezoelectric load 500 to disperse the outlet air of the air-conditioning equipment, thereby making the air outlet of the air-conditioning equipment softer and improving the comfort of air supply; in addition, the embodiment of the present application is also provided with a voltage boosting module 100, a signal generating module 200, a stepless voltage regulation module 300 and an inverter module 400, and the output of any bus voltage V IN is achieved by adjusting the duty cycle. During the gear switching process, the dynamic stepless voltage regulation method plays a current buffering role, which solves the problems of input current overshoot and input voltage drop during gear switching, thereby improving the dynamic control effect of the active wind field.

[0054] It is worth noting that regarding the installation position of the above-mentioned piezoelectric load 500, in addition to being installed at the air outlet of the air-conditioning equipment to adjust the wind field distribution of the air outlet, it can also be set inside the air-conditioning equipment as a power source for blowing air, and can also be set on other equipment that requires heat dissipation for heat dissipation.

[0055] It is understandable that the piezoelectric load 500 can be a piezoelectric ceramic sheet, which can be equipped with a variety of ceramic formulas to make ceramic sheet products for various applications. The piezoelectric ceramic sheet has the advantages of high sensitivity, low energy consumption, good reliability, good stability, high and low temperature resistance, long life, thin thickness, light weight, small size, and high voltage resistance.

[0056] It should be noted that the working principle of the piezoelectric ceramic is: when voltage is applied to the piezoelectric ceramic, the piezoelectric ceramic will produce mechanical deformation as the voltage and frequency change.

[0057] In one embodiment, the stepless voltage regulation module 300 includes but is not limited to an integration circuit unit 310, a voltage follower unit 320 and a current regulation unit 330. The voltage input end of the voltage follower unit 320 is connected to the signal generation module 200 through the integration circuit unit 310, and the voltage output end of the voltage follower unit 320 is connected to the voltage boosting module 100 through the current regulation unit 330.

[0058] Specifically, the voltage follower unit 320 includes a first operational amplifier 321 , a voltage input terminal of the first operational amplifier 321 is connected to the integration circuit unit 310 , a voltage output terminal of the first operational amplifier 321 is connected to a voltage feedback terminal, and is also connected to the current regulation unit 330 .

[0059] It is understood that the first operational amplifier 321 described above can be a general-purpose operational amplifier, a high-precision operational amplifier, or another operational amplifier capable of voltage following. The operational amplifier does not amplify the signal, that is, the input voltage is equal to the output voltage. The embodiments of the present application do not specifically limit the structural type of the first operational amplifier 321. Operational amplifiers have the characteristics of high gain, high input and output resistance, good linearity, adjustable gain, versatility, and low power consumption, and are therefore widely used.

[0060] Specifically, the current regulating unit 330 includes a first resistor R1, a second resistor R2 and a third resistor R3. One end of the first resistor R1 is connected to the output end of the voltage boosting module 100, and the other end is connected to the ground end through the second resistor R2. The common end of the first resistor R1 and the second resistor R2 is also connected to the voltage output end of the voltage following unit 320 through the third resistor R3.

[0061] Specifically, the integration circuit unit 310 includes a fourth resistor R4 and a first capacitor C1, one end of the fourth resistor R4 is connected to the output end of the signal generating module 200, and the other end is connected to the ground end through the first capacitor C1, and the common end of the fourth resistor R4 and the first capacitor C1 is also connected to the voltage input end of the voltage follower unit.

[0062] Specifically, the stepless voltage regulation module 300 performs stepless voltage regulation on the initial output voltage according to the duty cycle D of the waveform signal, and outputs any bus voltage VIN by adjusting the duty cycle. Wherein, VFB is the feedback voltage of the boost chip 130 , ie, the voltage at the common end between the first resistor R1 , the second resistor R2 , and the third resistor R3 , and VFB is a fixed value. VP is the waveform amplitude of the target duty cycle output by the controller 210 .

[0063] As shown in FIG2 , FIG2 is a circuit structure diagram of a voltage control circuit provided in another embodiment of the present application.

[0064] In one embodiment, the stepless voltage regulation module 300 includes but is not limited to an integration circuit unit 310, a voltage follower unit 320 and a current regulation unit 330. The voltage input end of the voltage follower unit 320 is connected to the signal generation module 200 through the integration circuit unit 310, and the voltage output end of the voltage follower unit 320 is connected to the voltage boosting module 100 through the current regulation unit 330.

[0065] Specifically, the voltage follower unit 320 includes an isolation chip 322 , a voltage input terminal of the isolation chip 322 is connected to the integration circuit unit 310 , and a voltage output terminal of the isolation chip 322 is connected to the current regulation unit 330 .

[0066] It is understood that the isolation chip 322 described above can be an isolated operational amplifier, a high-speed digital isolator, or another isolation chip capable of voltage following. The isolation chip 322 can achieve electrical isolation between the input and output, ensuring that the input voltage is equal to the output voltage. The embodiments of this application do not specifically limit the structural type of the isolation chip 322. The isolation chip 322 has advantages such as electrical isolation, signal transmission integrity, high-speed performance, safety, compatibility, and low power consumption.

[0067] Specifically, the current regulating unit 330 includes a first resistor R1, a second resistor R2 and a third resistor R3. One end of the first resistor R1 is connected to the output end of the voltage boosting module 100, and the other end is connected to the ground end through the second resistor R2. The common end of the first resistor R1 and the second resistor R2 is also connected to the voltage output end of the voltage following unit 320 through the third resistor R3.

[0068] Specifically, the integration circuit unit 310 includes a fourth resistor R4 and a first capacitor C1, one end of the fourth resistor R4 is connected to the output end of the signal generating module 200, and the other end is connected to the ground end through the first capacitor C1, and the common end of the fourth resistor R4 and the first capacitor C1 is also connected to the voltage input end of the voltage follower unit.

[0069] Specifically, the stepless voltage regulation module 300 performs stepless voltage regulation on the initial output voltage according to the duty cycle D of the waveform signal, and outputs any bus voltage VIN by adjusting the duty cycle. Wherein, VFB is the feedback voltage of the boost chip 130 , ie, the voltage at the common end between the first resistor R1 , the second resistor R2 , and the third resistor R3 , and VFB is a fixed value. VP is the waveform amplitude of the target duty cycle output by the controller 210 .

[0070] As shown in Figures 1 and 2, the voltage boost module 100 also includes but is not limited to a boost chip 130 and a peripheral boost circuit. The peripheral boost circuit is provided with a boost switch tube Q5, a first inductor L1 and a boost capacitor C6. The first inductor L1 is connected to the boost switch tube Q5 and the boost capacitor C6 respectively. The boost chip 130 is connected to the control end of the boost switch tube Q5 and is used to control the on and off of the boost switch tube Q5. When the boost switch tube Q5 is turned on, the first inductor L1 is charged; when the boost switch tube Q5 is turned off, the first inductor L1 is discharged and the boost capacitor C6 is charged; the boost capacitor C6 is used to supply power to the inverter module 400.

[0071] It should be noted that the boost chip 130 can output a square wave signal to the boost switch tube Q5. Therefore, when the boost switch tube Q5 receives a high-level signal, the boost switch tube Q5 is in the on state, and the DC voltage flows through the first inductor L1, the boost switch tube Q5 and the impedance device back to the negative end of the power supply, thereby charging the first inductor L1. When the boost switch tube Q5 receives a low-level signal, the boost switch tube Q5 is in the off state, and the DC voltage flows through the first inductor L1 and the boost capacitor C6 back to the negative end of the power supply, thereby discharging the first inductor L1 and charging the boost capacitor C6.

[0072] Furthermore, the feedback voltage VFB of the boost chip 130 is a fixed value.

[0073] It is understandable that when charging the boost capacitor C6, a first unidirectional conductive device D1 can be set on the charging circuit of the boost capacitor C6 to control the unidirectional conduction of the current of the voltage boost module 100. At this time, the DC voltage returns to the negative end of the power supply through the first inductor L1, the first unidirectional conductive device D1 and the boost capacitor C6, and charges the boost capacitor C6 at the same time.

[0074] It is understandable that the above-mentioned first unidirectional conductive device D1 can be a Schottky diode, which has the greatest advantages of low impedance, small forward voltage drop, and fast recovery speed. It is used in high-frequency, large-current rectification and power-down protection circuits. Rectifier diodes, diode thyristors, etc. can also be selected. The type of the first unidirectional conductive device D1 can be selected according to actual needs and is not specifically limited here.

[0075] It is understandable that the boost switch Q5 mentioned above can be a field effect tube and a transistor, or other switch tubes capable of controlling on and off. The switch tube is turned on by a high level input and cut off by a low level input. The embodiments of the present application do not specifically limit the structural type of the boost switch tube Q5. For example, when an NPN transistor is used as the switch tube, the first end of the boost switch tube Q5 can be the collector, and the control end can be the base. When a junction field effect transistor is used as the switch tube, the first end of the boost switch tube Q5 can be the drain, and the control end can be the gate. The switch tube has the characteristics of long life, safety and reliability, no mechanical wear, fast switching speed, and small size. The switch tube can use a very small current to control the on and off of a large current, and has a wide range of applications.

[0076] It is understood that the first inductor L1 mentioned above refers to an inductor capable of charging and discharging. Inductors are mainly divided into wound inductors, multilayer chip inductors, and thin film inductors according to the process. Among them, wound inductors can provide large current and high inductance. The greater the magnetic permeability of the magnetic core, the less winding is required for the same inductance, which can reduce DC resistance. For the same size, fewer windings can be thicker, increasing current. Multilayer chip inductors are wireless inductors made of magnetic materials using multi-layer production technology. They use ferrite paste alternately stacked and sintered to form an overall monolithic structure with a closed magnetic circuit, thus providing magnetic shielding. Thin film inductors are inductors made using vacuum thin film technology. They are highly reliable, easy to integrate and chip-type, and very suitable for automated surface mounting technology. They also have advantages such as small size and good high-frequency characteristics. The type of the third energy storage device L2 mentioned above can be selected according to actual needs and is not specifically limited here.

[0077] It is understood that the boost capacitor C6 mentioned above refers to a capacitor that can be charged and discharged. Capacitors are mainly divided into aluminum electrolytic capacitors, ceramic capacitors, mica capacitors, etc. Among them, aluminum electrolytic capacitors are characterized by large capacity and positive and negative polarity, suitable for power supply filtering or low-frequency circuits; ceramic capacitors are characterized by small size, good heat resistance, low loss, high insulation resistance, but small capacity, suitable for high-frequency circuits; mica capacitors are characterized by low dielectric loss, high insulation resistance, and a small temperature coefficient, suitable for high-frequency circuits. The type of boost capacitor C6 mentioned above can be selected according to actual conditions and is not specifically limited here.

[0078] Specifically, the signal generating module 200 includes a controller 210 for outputting a square wave signal and directly adjusting a duty cycle D of the square wave signal.

[0079] Specifically, the above-mentioned square wave signal has a high level and a low level. Exemplarily, upon receiving a voltage adjustment instruction, the controller 210 outputs a square wave signal corresponding to the duty cycle.

[0080] Specifically, the inverter module 400 includes but is not limited to a pulse cluster generating and amplifying unit 410 and a coupling unit 420. The pulse cluster generating and amplifying unit 410 is connected to the output end of the voltage boosting module 100, and is used to generate a pulse cluster signal and amplify the pulse cluster signal according to the target output voltage to obtain a high-voltage pulse cluster signal, wherein the amplitude of the high-voltage pulse cluster signal is the target output voltage; the coupling unit 420 is connected to the output end of the pulse cluster generating and amplifying unit 410, and is used to filter and transform the high-voltage pulse cluster signal to couple and form a full-cycle sinusoidal AC voltage.

[0081] Specifically, the pulse cluster generating amplification unit 410 includes a driving circuit 411, a first switching amplifying branch 412 and a second switching amplifying branch 413. The driving circuit 411 is connected to the first switching amplifying branch 412 and the second switching amplifying branch 413 respectively. The first switching amplifying branch 412 is used to output a first DC voltage signal, and the second switching amplifying branch 413 is used to output a second DC voltage signal, wherein a 180° phase difference is formed between the first DC voltage signal and the second DC voltage signal.

[0082] Specifically, the coupling unit 420 includes a first filtering branch 421 and a second filtering branch 422. The first filtering branch 421 is connected to the first switching amplification branch 412, and the second filtering branch 422 is connected to the second switching amplification branch 413. The coupling unit 420 is used to obtain a full-cycle AC voltage signal based on the coupling of the first DC voltage signal and the second DC voltage signal.

[0083] Furthermore, the first switching amplifying branch 412 includes, but is not limited to, a first amplifying switch transistor Q1 and a second amplifying switch transistor Q2. The second switching amplifying branch 413 includes, but is not limited to, a third amplifying switch transistor Q3 and a fourth amplifying switch transistor Q4. The collector of the first amplifying switch transistor Q1 is connected to the emitter of the second amplifying switch transistor Q2, and the collector of the third amplifying switch transistor Q3 is connected to the emitter of the fourth amplifying switch transistor Q4. The first filtering branch 421 is connected between the first amplifying switch transistor Q1 and the second amplifying switch transistor Q2, and the second filtering branch 422 is connected between the third amplifying switch transistor Q3 and the fourth amplifying switch transistor Q4. When the second amplifying switch transistor Q2 and the third amplifying switch transistor Q3 are turned on and the first amplifying switch transistor Q1 and the fourth amplifying switch transistor Q4 are turned off, the second switching amplifying branch 413 outputs a signal for the second half cycle. When the first amplifying switch transistor Q1 and the fourth amplifying switch transistor Q4 are turned on and the second amplifying switch transistor Q2 and the third amplifying switch transistor Q3 are turned off, the first switching amplifying branch 412 outputs a signal for the first half cycle.

[0084] It is understandable that the first amplifying switch tube Q1, the second amplifying switch tube Q2, the third amplifying switch tube Q3, and the fourth amplifying switch tube Q4 mentioned above may be field-effect transistors and triodes, or other switch tubes capable of on-off control. The switch tubes are turned on by a high-level input and cut off by a low-level input. The embodiments of the present application do not specifically limit the structural types of the first amplifying switch tube Q1, the second amplifying switch tube Q2, the third amplifying switch tube Q3, and the fourth amplifying switch tube Q4.

[0085] Furthermore, the first filter branch 421 includes but is not limited to a first filter inductor L2 and a first filter capacitor C2, the second filter branch 422 includes but is not limited to a second filter inductor L3 and a second filter capacitor C3, one end of the first filter capacitor C2 is connected to the first filter inductor L2, and the other end is grounded, one end of the second filter capacitor C3 is connected to the second filter inductor L3, and the other end is grounded, the entire coupling unit 420 is used to filter out interference signals in the circuit, and to differentially couple the DC voltage signals from the first switching amplifier branch 412 and the second switching amplifier branch 413 to convert them into AC voltage signals for output.

[0086] It is understood that the first filter inductor L2 and the second filter inductor L3 mentioned above refer to inductors with filtering functions. Inductors are mainly divided into wound inductors, multilayer chip inductors, and thin film inductors according to the process. Among them, wound inductors can provide large current and high inductance. The greater the magnetic permeability of the magnetic core, the less winding is required for the same inductance, and less winding can reduce DC resistance. For the same size, less winding can be thicker, which increases the current. Multilayer chip inductors are wireless inductors made of magnetic materials using multi-layer production technology. They use ferrite paste to alternately stack and adopt a sintering process to form an overall monolithic structure with a closed magnetic circuit, so they have a magnetic shielding effect. Thin film inductors are an inductor made using a vacuum thin film process. They are highly reliable, easy to integrate and chip-type, and are very suitable for automated surface mounting technology. In addition, due to their small size and good high-frequency characteristics, they have the advantages of good performance. The types of the first filter inductor L2 and the second filter inductor L3 mentioned above can be selected according to actual needs and are not specifically limited here.

[0087] It is understood that the first filter capacitor C2 and the second filter capacitor C3 described above refer to capacitors with filtering functions. Capacitors are mainly divided into aluminum electrolytic capacitors, ceramic capacitors, mica capacitors, etc. Among them, aluminum electrolytic capacitors are characterized by large capacity and positive and negative polarity, suitable for power supply filtering or low-frequency circuits; ceramic capacitors are characterized by small size, good heat resistance, low loss, high insulation resistance, but small capacity, suitable for high-frequency circuits; mica capacitors are characterized by low dielectric loss, high insulation resistance, and a small temperature coefficient, suitable for high-frequency circuits. The types of the first filter capacitor C2 and the second filter capacitor C3 described above can be selected according to actual conditions and are not specifically limited here.

[0088] As shown in FIG1 , after power-on, the controller 210 receives a voltage regulation instruction, determines the corresponding target output voltage according to the voltage regulation instruction, and determines the target duty cycle according to the target output voltage and the initial output voltage. When the target output voltage is greater than the initial output voltage, the duty cycle is adjusted to increase it. When the target output voltage is less than the initial output voltage, the duty cycle is adjusted to decrease it. The waveform signal of the target duty cycle is output to the stepless voltage regulation module 300 through the signal generation module 200, and the first operational amplifier 321 performs stepless voltage regulation on the initial output voltage according to the target duty cycle of the waveform signal. The boost chip 130 is capable of outputting a square wave signal to the boost switch Q5. When the boost switch Q5 receives a high-level signal, it is turned on, and a DC voltage flows through the first inductor L1, the boost switch Q5, and the impedance device back to the negative terminal of the power supply, thereby charging the first inductor L1. When the boost switch Q5 receives a low-level signal, the boost switch Q5 is turned off, and a DC voltage flows through the first inductor L1 and the boost capacitor C6 back to the negative terminal of the power supply, thereby discharging the first inductor L1 and charging the boost capacitor C6. According to the voltage regulation instruction, a square wave signal with a different duty cycle is output. Finally, it is converted into a corresponding AC voltage by the voltage boost module 100 and the inverter module 400 and applied to the electrodes of the piezoelectric load 500, causing the piezoelectric load 500 to vibrate with a corresponding amplitude according to the corresponding AC voltage, achieving stepless regulation. One voltage regulation instruction corresponds to one time adjustment step and one duty cycle adjustment step.

[0089] As shown in FIG2 , after power-on, the controller 210 receives the voltage regulation instruction, determines the corresponding target output voltage according to the voltage regulation instruction, and determines the target duty cycle according to the target output voltage and the initial output voltage. When the target output voltage is greater than the initial output voltage, the duty cycle is adjusted to increase it. When the target output voltage is less than the initial output voltage, the duty cycle is adjusted to decrease it. The signal generation module 200 outputs a waveform signal of the target duty cycle to the stepless voltage regulation module, and the isolation chip 322 performs stepless voltage regulation on the initial output voltage according to the duty cycle of the waveform signal. The target output voltage is obtained by processing. Since the boost chip 130 can output a square wave signal to the boost switch Q5, when the boost switch Q5 receives a high-level signal, it is turned on, and a DC voltage flows through the first inductor L1, the boost switch Q5, and the impedance device back to the negative terminal of the power supply, thereby charging the first inductor L1. When the boost switch Q5 receives a low-level signal, the boost switch Q5 is turned off, and a DC voltage flows through the first inductor L1 and the boost capacitor C6 back to the negative terminal of the power supply, thereby discharging the first inductor L1 and charging the boost capacitor C6. According to the voltage regulation instruction, a square wave signal with different duty cycles is output. Finally, it is converted into a corresponding AC voltage by the voltage boost module 100 and the inverter module 400 and applied to the electrodes of the piezoelectric load 500, causing the piezoelectric load 500 to vibrate with a corresponding amplitude according to the corresponding AC voltage, achieving stepless regulation. In particular, one voltage regulation instruction corresponds to one time adjustment step and one duty cycle adjustment step.

[0090] As shown in Figures 3 and 4, Figure 3 is a circuit structure diagram of a voltage control circuit provided in another embodiment of the present application, and Figure 4 is a circuit structure diagram of a voltage control circuit provided in another embodiment of the present application.

[0091] Specifically, the signal generating module 200 includes a square wave generating circuit 220 , which is used to output a square wave signal to the stepless voltage regulating module 300 , and the square wave generating circuit 220 includes an adjustable resistor RL for adjusting the duty cycle of the square wave signal.

[0092] Furthermore, the square wave generating circuit 220 also includes a second operational amplifier 221, a storage capacitor C5, a fifth resistor R5 and a sixth resistor R6, one end of the storage capacitor C5 is connected to a voltage input end of the second operational amplifier 221, and is also connected to the voltage output end of the second operational amplifier 221 through the adjustable resistor RL, the voltage output end of the second operational amplifier 221 is connected to the ground end through the fifth resistor R5 and the sixth resistor R6, and the common end of the fifth resistor R5 and the sixth resistor R6 is connected to another voltage input end of the second operational amplifier 221.

[0093] It is understandable that the square wave generating circuit 220 changes the duty cycle of the output by changing the ratio of Rf1 to Rf2 of the adjustable resistor RL, wherein the adjustable resistor RL = Rf1 + Rf2, the duty cycle Therefore, the duty cycle D can be changed by adjusting the value of Rf1.

[0094] As shown in FIG3 , after power-on, the square wave generating circuit 220 changes the duty cycle of the square wave signal by changing the size of the adjustable resistor Rf1 of RL. When the target output voltage is greater than the initial output voltage, the size of Rf1 is adjusted to increase its size. When the target output voltage is less than the initial output voltage, the size of Rf1 is adjusted to decrease its size. The first operational amplifier 321 performs stepless voltage regulation on the initial output voltage according to the duty cycle of the waveform signal to obtain the target output voltage. Since the boost chip 130 can output A square wave signal is output to the boost switch Q5. Therefore, when the boost switch Q5 receives a high-level signal, it is turned on, and a DC voltage flows through the first inductor L1, the boost switch Q5, and the impedance device back to the negative terminal of the power supply, thereby charging the first inductor L1. When the boost switch Q5 receives a low-level signal, the boost switch Q5 is turned off, and a DC voltage flows through the first inductor L1 and the boost capacitor C6 back to the negative terminal of the power supply, thereby discharging the first inductor L1 and charging the boost capacitor C6. According to the voltage regulation command, a square wave signal with different duty cycles is output. Finally, it is converted into a corresponding AC voltage by the voltage boost module 100 and the inverter module 400 and applied to the electrodes of the piezoelectric load 500, causing the piezoelectric load 500 to vibrate with a corresponding amplitude according to the corresponding AC voltage, achieving stepless regulation.

[0095] As shown in FIG4 , after power-on, the square wave generating circuit 220 changes the duty cycle of the square wave signal by changing the value of Rf1 of the adjustable resistor RL. When the target output voltage is greater than the initial output voltage, the value of Rf1 is adjusted to increase, and when the target output voltage is less than the initial output voltage, the value of Rf1 is adjusted to decrease. The isolation chip 322 performs stepless voltage regulation on the initial output voltage according to the duty cycle of the waveform signal to obtain the target output voltage. Since the boost chip 130 can output a square wave signal to the boost switch Q5, when the boost switch Q5 receives a high-level signal, the boost switch Q5 is turned on, and a DC voltage flows through the first inductor L1, the boost switch Q5, and the impedance device back to the negative terminal of the power supply, thereby charging the first inductor L1. When the boost switch Q5 receives a low-level signal, the boost switch Q5 is turned off, and a DC voltage flows through the first inductor L1 and the boost capacitor C6 back to the negative terminal of the power supply, thereby discharging the first inductor L1 and charging the boost capacitor C6. According to the voltage regulation instruction, a square wave signal with different duty cycles is output, and finally converted into a corresponding AC voltage by the voltage boost module 100 and the inverter module 400 and applied to both ends of the electrodes of the piezoelectric load 500, so that the piezoelectric load 500 emits a vibration of corresponding amplitude according to the corresponding AC voltage, thereby realizing stepless regulation.

[0096] As shown in FIG5 and FIG6 , FIG5 is a structural diagram of an air conditioning device provided in one embodiment of the present application, and FIG6 is a structural diagram of a piezoelectric load provided in one embodiment of the present application.

[0097] In one embodiment, the air conditioning equipment is provided with a piezoelectric load 500 and a voltage control circuit of any of the above embodiments. The piezoelectric load 500 is provided at the air outlet of the air conditioning equipment. The voltage control circuit is connected to the piezoelectric load 500 for controlling the piezoelectric load 500 to vibrate.

[0098] It is understandable that there are multiple groups of piezoelectric loads 500, each group includes at least one piezoelectric load 500, and each group of piezoelectric loads 500 is independently controlled by a corresponding voltage control circuit.

[0099] It is worth noting that when the air outlet speed of the air conditioning equipment is greater, the DC voltage output by the voltage control circuit is greater, and the AC voltage received by the piezoelectric load 500 is greater, thereby making the swing amplitude of the piezoelectric load 500 larger, and thus the wind can be dispersed to achieve a soft wind feeling; on the contrary, when the air outlet speed of the air conditioning equipment is smaller, the DC voltage output by the voltage control circuit is smaller, and the AC voltage received by the piezoelectric load 500 is smaller, thereby making the swing amplitude of the piezoelectric load 500 smaller, and thus will not destroy the soft wind feeling.

[0100] It is understandable that the air conditioning equipment may be an air conditioner, an air purifier, a humidifier or other device that can blow air to condition the air, and the type of the air conditioning equipment is not specifically limited here.

[0101] According to the technical solution of the embodiment of the present application, first, the embodiment of the present application adds a piezoelectric load 500 to the air outlet of the air-conditioning equipment, and uses the vibration of the piezoelectric load 500 to disperse the outlet air of the air-conditioning equipment, thereby making the air outlet of the air-conditioning equipment softer and improving the comfort of air supply; in addition, the embodiment of the present application is also provided with a voltage boosting module 100, a signal generating module 200, a stepless voltage regulation module 300 and an inverter module 400.

[0102] Specifically, the voltage boost module 100 regulates the input voltage to obtain an initial output voltage.

[0103] Furthermore, the signal generating module 200 is used to receive a voltage regulation instruction, determine the corresponding target output voltage according to the voltage regulation instruction, and adjust the duty cycle of the waveform signal according to the size of the target output voltage and the initial output voltage, and output the waveform signal of the target duty cycle to the stepless voltage regulation module 300.

[0104] Furthermore, the stepless voltage regulation module 300 is connected between the output terminal of the signal generation module 200 and the voltage boost module, and is used to perform stepless voltage regulation on the initial output voltage according to the duty cycle of the waveform signal to obtain the target output voltage;

[0105] Furthermore, the input side of the inverter module 400 is connected to the output of the voltage boost module, and the output side is used to output an AC voltage to the piezoelectric load 500, so that the piezoelectric load 500 vibrates with a corresponding amplitude according to the corresponding AC voltage, achieving stepless regulation. Here, one voltage regulation instruction corresponds to one time adjustment step and one duty cycle adjustment step.

[0106] It is worth noting that since the air conditioning equipment of the embodiments of the present application includes the voltage control circuit of the above embodiments, the specific implementation methods and technical effects of the air conditioning equipment of the embodiments of the present application can refer to the specific implementation methods and technical effects of the voltage control circuit of any of the above embodiments.

[0107] As shown in FIG7 , FIG7 is a schematic diagram of a system architecture platform for executing a voltage control method provided in one embodiment of the present application.

[0108] The system architecture platform 700 of the embodiment of the present application includes one or more processors 710 and a memory 720. FIG7 takes one processor 710 and one memory 720 as an example.

[0109] The processor 710 and the memory 720 may be connected via a bus or other means. FIG. 7 takes the bus connection as an example.

[0110] The memory 720 is a non-transitory computer-readable storage medium that can be used to store non-transitory software programs and non-transitory computer executable programs. In addition, the memory 720 may include a high-speed random access memory and may also include a non-transitory memory, such as at least one disk storage device, a flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory 720 may optionally include a memory 720 remotely located relative to the processor 710, and these remote memories may be connected to the system architecture platform 700 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0111] Those skilled in the art will understand that the circuit structure shown in FIG7 does not constitute a limitation on the system architecture platform 700, and may include more or fewer components than shown in the figure, or a combination of certain components, or a different arrangement of components.

[0112] In the system architecture platform 700 shown in FIG7 , the processor 710 may be used to call a control program of a voltage control circuit stored in a memory 720 , thereby implementing a voltage control method.

[0113] Based on the hardware structure of the above-mentioned system architecture platform 700, voltage control circuit and air conditioning equipment 600, various embodiments of the voltage control method of the present application are proposed.

[0114] As shown in Figures 1, 2, and 8, Figure 8 is a flow chart of a voltage control method provided by an embodiment of the present application. The control method can be applied to the above-mentioned voltage control circuit and air conditioning equipment, and may include but is not limited to steps S110 to S140.

[0115] Step S110: receiving a voltage adjustment instruction, and determining a corresponding target output voltage according to the voltage adjustment instruction;

[0116] Step S120, determining a target duty cycle according to the target output voltage and the initial output voltage;

[0117] Step S130: Outputting a waveform signal of a target duty cycle to a stepless voltage regulation module via a signal generation module;

[0118] Step S140 : performing stepless voltage regulation on the initial output voltage based on the waveform signal by the stepless voltage regulation module, so as to adjust the initial output voltage to the target output voltage.

[0119] Specifically, a voltage regulation instruction is received, a target output voltage corresponding to the voltage regulation instruction is determined based on the voltage regulation instruction, and a target duty cycle is determined based on the target output voltage and the initial output voltage. A waveform signal of the target duty cycle is then output to the stepless voltage regulation module via the signal generation module. The stepless voltage regulation module then performs stepless voltage regulation on the initial output voltage based on the waveform signal, thereby adjusting the initial output voltage to the target output voltage. One voltage regulation instruction corresponds to one time adjustment step and one duty cycle adjustment step. Therefore, the initial output voltage can be adjusted to the target output voltage by adjusting the duty cycle. One voltage regulation instruction corresponds to one time adjustment step and one duty cycle adjustment step.

[0120] As shown in Figures 1 and 9, Figure 9 is a specific flow chart of step S130 of the voltage control method provided in the embodiment of Figure 8. The voltage control method of the embodiment of the present application may include but is not limited to step S210.

[0121] Step S130: Outputting a waveform signal of a target duty cycle to a stepless voltage regulation module via a signal generation module;

[0122] Step S210: When the signal generating module is a controller, the controller directly outputs a waveform signal of a target duty cycle to the stepless voltage regulating module.

[0123] Specifically, a voltage regulation instruction is received, a target output voltage corresponding to the voltage regulation instruction is determined based on the voltage regulation instruction, and a target duty cycle is determined based on the target output voltage and the initial output voltage. The controller then outputs a waveform signal indicating the target duty cycle to the stepless voltage regulation module. The stepless voltage regulation module then performs stepless voltage regulation on the initial output voltage based on the waveform signal, thereby adjusting the initial output voltage to the target output voltage. Each voltage regulation instruction corresponds to one time adjustment step and one duty cycle adjustment step. Therefore, the initial output voltage can be adjusted to the target output voltage by adjusting the duty cycle.

[0124] As shown in Figures 2 and 10, Figure 10 is another specific flow chart of step S130 of the voltage control method provided in the embodiment of Figure 8. The voltage control method of the embodiment of the present application may include but is not limited to step S220.

[0125] Step S130: Outputting a waveform signal of a target duty cycle to a stepless voltage regulation module via a signal generation module;

[0126] Step S220: When the signal generating module is a square wave generating circuit and the square wave generating circuit includes an adjustable resistor, the resistance value of the adjustable resistor is adjusted to output a waveform signal with a target duty cycle to the stepless voltage regulating module.

[0127] Specifically, a voltage regulation instruction is received, a target output voltage corresponding to the voltage regulation instruction is determined based on the voltage regulation instruction, and a target duty cycle is determined based on the target output voltage and the initial output voltage. Since the square wave generating circuit includes an adjustable resistor, the resistance of the adjustable resistor is adjusted to output a waveform signal with the target duty cycle to the stepless voltage regulation module. The stepless voltage regulation module then performs stepless voltage regulation on the initial output voltage based on the waveform signal to adjust the initial output voltage to the target output voltage. One voltage regulation instruction corresponds to one time adjustment step and one duty cycle adjustment step. Therefore, the initial output voltage can be adjusted to the target output voltage by adjusting the duty cycle.

[0128] As shown in Figures 1, 2 and 11, Figure 11 is a control logic flow chart of a stepless voltage regulation module provided in one embodiment of the present application. Specific steps are as follows.

[0129] 1) The system outputs the initial output voltage U;

[0130] 2) Determine the corresponding target output voltage Uref according to the voltage regulation instruction;

[0131] 3) Determine the magnitude of the target output voltage Uref and the initial output voltage U;

[0132] 3.1) If the target output voltage Uref is less than the initial output voltage U, the duty cycle is increased and the output voltage U decreases;

[0133] 3.1.1) Determine the magnitude of the target output voltage Uref and the output voltage U at this time;

[0134] 3.1.1.1) If the target output voltage Uref is lower than the current output voltage U, increase the duty cycle and reduce the output voltage U;

[0135] 3.1.1.2) If the target output voltage Uref is equal to the current output voltage U, then the system will operate according to the target output voltage Uref;

[0136] 3.2) If the target output voltage Uref is greater than the initial output voltage U, the duty cycle is reduced and the output voltage U increases;

[0137] 3.2.1) Determine the magnitude of the target output voltage Uref and the output voltage U at this time;

[0138] 3.2.1.1) If the target output voltage Uref is greater than the current output voltage U, the duty cycle is reduced and the output voltage U increases;

[0139] 3.2.1.2) If the target output voltage Uref is equal to the current output voltage U, then the system will operate according to the target output voltage Uref.

[0140] Specifically, after the system is powered on, it will output an initial output voltage U. Then, after the controller receives the voltage regulation instruction, it determines the corresponding target output voltage Uref according to the voltage regulation instruction in a step size T, and then judges the size of the target output voltage Uref and the initial output voltage U. If the target output voltage Uref is less than the initial output voltage U, the duty cycle is increased, the output voltage U decreases, and then the size of the target output voltage Uref and the output voltage U at this time is judged. If the target output voltage Uref is less than the output voltage U, the duty cycle is further increased, the output voltage U decreases. If the target output voltage is equal to the output voltage U at this time, it operates according to the target output voltage Uref; if the target output voltage Uref is greater than the initial output voltage U, the duty cycle is reduced, the output voltage U increases, and then the size of the target output voltage Uref and the output voltage U at this time is judged. If the target output voltage Uref is greater than the output voltage U at this time, the duty cycle is further reduced, the output voltage U increases. If the target output voltage is equal to the output voltage U at this time, it operates according to the target output voltage Uref.

[0141] As shown in Figures 1, 2 and 12, Figure 12 is a block diagram of different voltage regulation instructions provided by one embodiment of the present application. The specific steps are as follows.

[0142] 1) The controller receives voltage regulation instructions a1, a2, a3…an;

[0143] 2) Obtaining the required target output voltages Uref1, Uref2, Uref3, ..., Urefn;

[0144] 3) The controller compensates T1, T2, T3…Tn (0.1us≤T≤20s);

[0145] 4) Adjust the duty cycle D1, D2, D3...Dn (D≤100%);

[0146] 5) Obtain the corresponding bus voltages U1, U2, U3…UN (N≥2);

[0147] 6) voltage combinations (U1, U2), (U1, U3), (U1, U2, U3)…(U1…UN(N≥2)) generated according to the voltage regulation command;

[0148] 7) Operate according to the voltage combination of the current voltage regulation instruction.

[0149] Specifically, after the system is powered on, the controller receives voltage regulation instructions a1, a2, a3…an, and obtains the required target output voltage Uref1, Uref2, Uref3…Urefn according to the voltage regulation instructions. At this time, the controller adjusts the duty cycle D1, D2, D3…Dn (D≤100%) through the step size T1, T2, T3…Tn (0.1us≤T≤20s), thereby obtaining the corresponding bus voltage U1, U2, U3…UN(N≥2) through the circuit. Since different voltage regulation instructions will generate multiple voltage combinations (U1, U2), (U1, U3), (U1, U2, U3)…(U1…UN(N≥2)), the system will operate according to the voltage combination of the current voltage regulation instruction.

[0150] As shown in Figures 3, 4 and 13, Figure 13 is a control logic flow chart of a stepless voltage regulation module provided by another embodiment of the present application. The specific steps are as follows.

[0151] 1) The system outputs the initial output voltage U;

[0152] 2) Determine the corresponding target output voltage Uref according to the voltage regulation instruction;

[0153] 3) Determine the magnitude of the target output voltage Uref and the initial output voltage U;

[0154] 3.1) If the target output voltage Uref is less than the initial output voltage U, increase Rf1 and the output voltage U decreases;

[0155] 3.1.1) Determine the magnitude of the target output voltage Uref and the output voltage U at this time;

[0156] 3.1.1.1) If the target output voltage Uref is lower than the current output voltage U, increase Rf1 to reduce the output voltage U.

[0157] 3.1.1.2) If the target output voltage Uref is equal to the current output voltage U, then the system will operate according to the target output voltage Uref;

[0158] 3.2) If the target output voltage Uref is greater than the initial output voltage U, then reduce Rf1 and the output voltage U increases;

[0159] 3.2.1) Determine the magnitude of the target output voltage Uref and the output voltage U at this time;

[0160] 3.2.1.1) If the target output voltage Uref is greater than the current output voltage U, then reduce Rf1 to increase the output voltage U;

[0161] 3.2.1.2) If the target output voltage Uref is equal to the current output voltage U, then the system will operate according to the target output voltage Uref.

[0162] Specifically, after the system is powered on, it will output an initial output voltage U. Then, after receiving the voltage adjustment instruction, the controller determines the corresponding target output voltage Uref according to the voltage adjustment instruction in a step size T, and then judges the size of the target output voltage Uref and the initial output voltage U. If the target output voltage Uref is less than the initial output voltage U, the duty cycle is increased by increasing Rf1, and the output voltage U decreases. Then, the size of the target output voltage Uref and the output voltage U at this time is judged. If the target output voltage Uref is less than the output voltage U, the duty cycle is increased by increasing Rf1, and the output voltage U decreases. If the target output voltage is equal to the output voltage U at this time, the operation is carried out according to the target output voltage Uref; if the target output voltage Uref is greater than the initial output voltage U, the duty cycle is reduced by decreasing Rf1, and the output voltage U increases. Then, the size of the target output voltage Uref and the output voltage U at this time is judged. If the target output voltage Uref is greater than the output voltage U at this time, the duty cycle is reduced by decreasing Rf1, and the output voltage U increases. If the target output voltage is equal to the output voltage U at this time, the operation is carried out according to the target output voltage Uref.

[0163] Based on the voltage control methods of the above-mentioned embodiments, various embodiments of the controller, air conditioning equipment and computer-readable storage medium of the present application are respectively proposed below.

[0164] In addition, an embodiment of the present application provides a controller, which includes: a processor, a memory, and a computer program stored in the memory and executable on the processor.

[0165] The processor and the memory may be connected via a bus or other means.

[0166] It should be noted that the controller in this embodiment may include the processor and memory in the embodiment shown in Figure 7. Both belong to the same inventive concept, so both have the same implementation principles and beneficial effects, and will not be described in detail here.

[0167] The non-transient software program and instructions required to implement the voltage control method of the above embodiment are stored in the memory, and when executed by the processor, the voltage control method of the above embodiment is executed.

[0168] It is worth noting that since the controller of the embodiment of the present application can execute the voltage control method of any of the above embodiments, the specific implementation methods and technical effects of the controller of the embodiment of the present application can refer to the specific implementation methods and technical effects of the voltage control method of any of the above embodiments.

[0169] In addition, an embodiment of the present application further provides an air conditioning device, which includes the controller of any of the above embodiments.

[0170] It is worth noting that since the air conditioning equipment of the embodiments of the present application includes the controller of any of the above-mentioned embodiments, and the controller of any of the above-mentioned embodiments can execute the voltage control method of any of the above-mentioned embodiments, the specific implementation methods and technical effects of the air conditioning equipment of the embodiments of the present application can refer to the specific implementation methods and technical effects of the voltage control method of any of the above-mentioned embodiments.

[0171] In addition, an embodiment of the present application further provides a computer-readable storage medium storing computer-executable instructions for executing the voltage control method described above. For example, the method steps described in FIG. 8 to FIG. 10 are executed.

[0172] It is worth noting that since the computer-readable storage medium of the embodiments of the present application can execute the voltage control method of any of the above embodiments, the specific implementation methods and technical effects of the computer-readable storage medium of the embodiments of the present application can refer to the specific implementation methods and technical effects of the voltage control method of any of the above embodiments.

[0173] Those skilled in the art will appreciate that all or some of the steps and devices in the method disclosed above can be implemented as software, firmware, hardware, and appropriate combinations thereof. Some physical components or all physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, and the computer-readable medium can include computer storage media (or non-transitory media) and communication media (or temporary media). As known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory, or other memory technology, CD-ROM, digital versatile disks (DVD), or other optical disk storage, magnetic cassettes, magnetic tapes, magnetic disk storage, or other magnetic storage circuits, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, as is well known to those skilled in the art, communication media typically includes computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0174] Although the embodiments disclosed in this application are as described above, the contents are only embodiments adopted to facilitate understanding of this application and are not intended to limit this application. Any person skilled in the art to which this application belongs may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in this application. However, the scope of patent protection of this application shall still be defined by the attached claims.

[0175] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the above implementation mode. Technical personnel familiar with the art can also make various equivalent modifications or substitutions under the shared conditions that do not violate the spirit of the present application. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A voltage control circuit, comprising: A voltage boost module is used to adjust the input voltage to obtain an initial output voltage; A signal generating module, used for outputting a waveform signal and adjusting the duty cycle of the waveform signal; A stepless voltage regulation module, connected between the output end of the signal generating module and the voltage boosting module, for performing stepless voltage regulation on the initial output voltage according to the duty cycle of the waveform signal to obtain a target output voltage; as well as The inverter module has an input side connected to the output end of the voltage boost module, and an output side used to output an AC voltage to the piezoelectric load so that the piezoelectric load vibrates under the AC voltage.

2. The voltage control circuit according to claim 1, wherein: The stepless voltage regulation module includes an integration circuit unit, a voltage following unit and a current regulating unit. The voltage input end of the voltage following unit is connected to the signal generating module through the integration circuit unit, and the voltage output end of the voltage following unit is connected to the voltage boosting module through the current regulating unit.

3. The voltage control circuit according to claim 2, wherein: The voltage follower unit includes one of the following: a first operational amplifier, wherein a voltage input terminal of the first operational amplifier is connected to the integration circuit unit, a voltage output terminal of the first operational amplifier is connected to a voltage feedback terminal, and is also connected to the current regulation unit; or An isolation chip, wherein a voltage input terminal of the isolation chip is connected to the integration circuit unit, and a voltage output terminal of the isolation chip is connected to the current regulation unit.

4. The voltage control circuit according to claim 2 or 3, wherein: The current regulating unit includes a first resistor, a second resistor and a third resistor, one end of the first resistor is connected to the output end of the voltage boosting module, and the other end is connected to the ground end through the second resistor, and the common end of the first resistor and the second resistor is also connected to the voltage output end of the voltage following unit through the third resistor.

5. The voltage control circuit according to any one of claims 2 to 4, wherein: The integration circuit unit includes a fourth resistor and a first capacitor, one end of the fourth resistor is connected to the output end of the signal generating module, and the other end is connected to the ground end through the first capacitor, and the common end of the fourth resistor and the first capacitor is also connected to the voltage input end of the voltage follower unit.

6. The voltage control circuit according to any one of claims 1 to 5, wherein: The signal generation module includes one of the following: A controller, configured to output a square wave signal and directly adjust the duty cycle of the square wave signal; or The square wave generating circuit is used to output a square wave signal to the stepless voltage regulating module, and the square wave generating circuit includes an adjustable resistor for adjusting the duty cycle of the square wave signal.

7. The voltage control circuit according to claim 6, wherein: In the case where the signal generating module includes a square wave generating circuit, the square wave generating circuit also includes a second operational amplifier, an energy storage capacitor, a fifth resistor and a sixth resistor, one end of the energy storage capacitor is connected to a voltage input terminal of the second operational amplifier, and is also connected to the voltage output terminal of the second operational amplifier through the adjustable resistor, the voltage output terminal of the second operational amplifier is connected to the ground terminal through the fifth resistor and the sixth resistor, and the common end of the fifth resistor and the sixth resistor is connected to another voltage input terminal of the second operational amplifier.

8. The voltage control circuit according to any one of claims 1 to 7, wherein: The voltage boost module includes a boost chip and a peripheral boost circuit, the peripheral boost circuit includes a boost switch tube, a first inductor and a boost capacitor, the first inductor is respectively connected to the boost switch tube and the boost capacitor, the boost chip is connected to the control end of the boost switch tube and is used to control the on or off of the boost switch tube, when the boost switch tube is turned on, the first inductor is charged; when the boost switch tube is turned off, the first inductor is discharged and the boost capacitor is charged; the boost capacitor is used to supply power to the inverter module.

9. The voltage control circuit according to any one of claims 1 to 7, wherein: The inverter module includes a pulse cluster generating and amplifying unit and a coupling unit. The pulse cluster generating and amplifying unit is connected to the output end of the voltage boosting module, and is used to generate a pulse cluster signal, and amplify the pulse cluster signal according to the target output voltage to obtain a high-voltage pulse cluster signal, wherein the amplitude of the high-voltage pulse cluster signal is the target output voltage; the coupling unit is connected to the output end of the pulse cluster generating and amplifying unit, and is used to filter and transform the high-voltage pulse cluster signal to couple and form a full-cycle sinusoidal AC voltage.

10. The voltage control circuit according to claim 9, wherein: The pulse cluster generating and amplifying unit includes a driving circuit, a first switching amplifying branch and a second switching amplifying branch. The driving circuit is connected to the first switching amplifying branch and the second switching amplifying branch respectively. The first switching amplifying branch is used to output a first DC voltage signal, and the second switching amplifying branch is used to output a second DC voltage signal, wherein a 180° phase difference is formed between the first DC voltage signal and the second DC voltage signal.

11. The voltage control circuit according to claim 10, wherein: The coupling unit includes a first filter branch and a second filter branch, the first filter branch is connected to the first switch amplifier branch, and the second filter branch is connected to the second switch amplifier branch. The coupling unit is used to obtain a full-cycle AC voltage signal according to the first DC voltage signal and the second DC voltage signal by coupling.

12. An air conditioning device, comprising a piezoelectric load and a voltage control circuit according to any one of claims 1 to 11, wherein the piezoelectric load is arranged at an air outlet of the air conditioning device, and the voltage control circuit is connected to the piezoelectric load.

13. A voltage control method, applied to the voltage control circuit according to any one of claims 1 to 11, the control method comprising: receiving a voltage regulation instruction, and determining a corresponding target output voltage according to the voltage regulation instruction; determining a target duty cycle according to the target output voltage and the initial output voltage; Outputting the waveform signal of the target duty cycle to the stepless voltage regulation module through the signal generation module; as well as The stepless voltage regulation module performs stepless voltage regulation on the initial output voltage based on the waveform signal, so that the initial output voltage is adjusted to the target output voltage.

14. The voltage control method according to claim 13, wherein: Outputting the waveform signal of the target duty cycle to the stepless voltage regulation module through the signal generation module includes one of the following: When the signal generating module is a controller, the waveform signal of the target duty cycle is directly output to the stepless voltage regulating module through the controller; or When the signal generating module is a square wave generating circuit and the square wave generating circuit includes an adjustable resistor, the waveform signal of the target duty cycle is output to the stepless voltage regulating module by adjusting the resistance value of the adjustable resistor.

15. The voltage control method according to claim 13 or 14, wherein: One voltage adjustment instruction corresponds to one time adjustment step and one duty cycle adjustment step. 16 . A computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are used to execute the voltage control method according to any one of claims 13 to 15.

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