Power supply device of electrostatic filter, control method of power supply device, equipment and storage medium

Abstract

The invention discloses a power supply device of an electrostatic filter, a control method of the power supply device, equipment and a storage medium. The power supply device comprises a booster circuit, a controller, a voltage detection circuit, a threshold voltage circuit, an accumulation detection circuit and a reset circuit, wherein the booster circuit is used for boosting a low-voltage power supply and then supplying power to a first electrode of an electrostatic filter; the controller is connected with the control end of the booster circuit and used for adjusting the output voltage value of the booster circuit. The voltage detection circuit is used for converting a discharge current between the first electrode and the second electrode into a discharge voltage value; the threshold voltage circuit is used for conducting control based on a comparison result of the discharge voltage value and a set voltage value; the accumulative detection circuit is used for generating an accumulative voltage value received from the threshold voltage circuit within a unit time length; and the reset circuit is arranged between the output end of the accumulation detection circuit and the grounding end, and is used for performing discharge reset on the accumulation detection circuit based on the unit time length.

Description

Technical Field

[0001] The present application relates to the field of air filtration, and in particular to a power supply device for an electrostatic filter and a control method, device and storage medium thereof. Background Art

[0002] With the continuous development of industrial level and scale, the emission of waste gas has gradually increased. Waste gas carries a large amount of harmful substances, which seriously affects the ecological environment and human health.

[0003] In the related art, various filtering devices are often used to purify the air to reduce the damage of impurities such as particulate matter in the air to human health. For example, a filtering device can be used to remove dust by using the gravity of the particles themselves, to remove dust by using water, or to remove dust by using electrostatic field force.

[0004] Electrostatic filter refers to a filter that maintains an electric field sufficient to ionize the gas through high voltage direct current on the metal anode and cathode. The electrons, anions and cations generated by the ionized gas are adsorbed on the dust passing through the electric field, so that the dust acquires an electric charge. Under the action of the electric field force, dust with different charges moves to electrodes of different polarities and deposits on the electrodes, thus achieving the purpose of separating dust and gas.

[0005] In the related art, in order to improve the working efficiency of the electrostatic filter, the following methods are often used:

[0006] Method 1: Increase the speed of the fan to increase the air volume flowing through the electrostatic filter;

[0007] Method 2: Increase the driving voltage of the electrostatic filter to enhance the ionization efficiency of the electric field.

[0008] However, in the above method 1, after the fan speed is increased, the noise will also increase, affecting the user experience; in the above method 2, after the driving voltage is increased, it is easy to cause arc discharge, thereby shortening the service life of the electrostatic filter. Summary of the invention

[0009] In view of this, an embodiment of the present application provides a power supply device for an electrostatic filter and a control method, device and storage medium thereof, aiming to improve the working efficiency of the electrostatic filter while taking into account user experience and service life.

[0010] The technical solution of the embodiment of the present application is implemented as follows:

[0011] In a first aspect, an embodiment of the present application provides a power supply device for an electrostatic filter, the power supply device comprising:

[0012] A boost circuit, used for boosting the low voltage power supply and supplying power to the first electrode of the electrostatic filter;

[0013] A controller, connected to the control end of the boost circuit, and used to adjust the output voltage value of the boost circuit;

[0014] a voltage detection circuit, disposed between the second electrode of the electrostatic filter and a ground terminal, for converting a discharge current between the first electrode and the second electrode into a discharge voltage value;

[0015] A threshold voltage circuit, connected to the output end of the voltage detection circuit, for performing conduction control based on a comparison result between the discharge voltage value and a set voltage value;

[0016] A cumulative detection circuit, connected to the output end of the threshold voltage circuit, for generating a cumulative voltage value received from the threshold voltage circuit within a unit time length;

[0017] The reset circuit is arranged between the output terminal of the cumulative detection circuit and the ground terminal, and is used for discharging and resetting the cumulative detection circuit based on the unit time length.

[0018] In some embodiments, the power supply device further comprises:

[0019] The voltage doubling circuit is arranged between the output side of the voltage boosting circuit and the first electrode.

[0020] In some embodiments, the boost circuit includes: a transformer, a first switch tube is provided on the primary winding side of the transformer for conduction control based on a pulse width modulation (PWM) signal output by the controller, and the output voltage value of the secondary winding of the transformer is adjusted based on the duty cycle of the PWM signal.

[0021] In some embodiments, the threshold voltage circuit includes a first Zener diode, a cathode of the first Zener diode is connected to an output end of the voltage detection circuit, and an anode of the first Zener diode is connected to an input end of the accumulation detection circuit.

[0022] In some embodiments, the power supply device further comprises:

[0023] A rectifier diode is arranged between the threshold voltage circuit and the cumulative detection circuit, wherein the anode of the rectifier diode is connected to the output end of the threshold voltage circuit, and the cathode of the rectifier diode is connected to the input end of the cumulative detection circuit.

[0024] In some embodiments, the cumulative detection circuit includes:

[0025] An electrolytic capacitor, wherein the negative electrode of the electrolytic capacitor is grounded;

[0026] A second voltage stabilizing diode, wherein a cathode of the second voltage stabilizing diode is connected to a positive electrode of an electrolytic capacitor, and an anode of the second voltage stabilizing diode is connected to a negative electrode of the electrolytic capacitor.

[0027] In some embodiments, the reset circuit comprises:

[0028] A second switch tube, wherein a control end of the second switch tube is connected to the controller, and the controller generates a driving signal based on the unit time length to control the second switch tube to be turned on, so that the cumulative detection circuit is discharged and reset.

[0029] In a second aspect, an embodiment of the present application provides a method for controlling a power supply device according to the first aspect of the embodiment of the present application, the method comprising:

[0030] Acquire a first accumulated voltage value generated by the accumulated detection circuit based on the unit time length;

[0031] Based on a comparison result between the first accumulated voltage value and a set voltage threshold, an output voltage value of the boost circuit is adjusted.

[0032] In some embodiments, adjusting the output voltage value of the boost circuit based on the comparison result between the first accumulated voltage value and the set voltage threshold value includes:

[0033] If it is determined that the first accumulated voltage value is less than or equal to the lower limit value of the set voltage threshold, then increasing the output voltage value of the boost circuit;

[0034] If it is determined that the first accumulated voltage value is greater than or equal to the upper limit value of the set voltage threshold, the output voltage value of the boost circuit is lowered.

[0035] In some embodiments, the method further comprises:

[0036] Based on a set time period, periodically acquiring a second accumulated voltage value of the accumulated detection circuit;

[0037] If it is determined that the second accumulated voltage value is greater than or equal to a set value, then lowering the output voltage value of the boost circuit;

[0038] The set duration is smaller than the unit duration.

[0039] In a third aspect, an embodiment of the present application provides a power supply device as described in one aspect of an embodiment of the present application, wherein the controller is configured to execute the steps of the method as described in the second aspect of the embodiment of the present application.

[0040] In a fourth aspect, an embodiment of the present application provides an electronic device, comprising: an electrostatic filter and the power supply device described in the third aspect of the embodiment of the present application.

[0041] In some embodiments, the electronic device is an air conditioner, and the electrostatic filter is an Intense Field Dielectric (IFD) filter disposed on the air inlet side of the air conditioner.

[0042] In a fifth aspect, an embodiment of the present application provides a storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the method described in the first aspect of the embodiment of the present application are implemented.

[0043] The technical solution provided by the embodiment of the present application is that the power supply device of the electrostatic filter includes: a boost circuit, a controller, a voltage detection circuit, a threshold voltage circuit, a cumulative detection circuit and a reset circuit. The boost circuit is used to boost the low-voltage power supply and supply it to the first electrode of the electrostatic filter; the controller is connected to the control end of the boost circuit, and is used to adjust the output voltage value of the boost circuit; the voltage detection circuit is arranged between the second electrode and the ground end of the electrostatic filter, and is used to convert the discharge current between the first electrode and the second electrode into a discharge voltage value; the threshold voltage circuit is connected to the output end of the voltage detection circuit, and is used to perform conduction control based on the comparison result between the discharge voltage value and the set voltage value; the cumulative detection circuit is connected to the output end of the threshold voltage circuit, and is used to generate the cumulative voltage value received from the threshold voltage circuit within a unit time length; the reset circuit is arranged between the output end of the cumulative detection circuit and the ground end, and is used to discharge and reset the cumulative detection circuit based on the unit time length. Based on the cumulative voltage value generated by the cumulative detection circuit per unit time, the cumulative number of flashover discharges of the electrostatic filter per unit time can be effectively evaluated, thereby providing a reasonable basis for adjusting the driving voltage of the electrostatic filter, so that the driving voltage of the electrostatic filter can effectively ensure the dust removal and / or sterilization efficiency, reduce the impact on the service life of the electrode, and there is no need to increase the fan speed, thereby taking into account the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a schematic diagram of the structure of the power supply device of the electrostatic filter according to the embodiment of the present application;

[0045] Figure 2 A schematic diagram of a narrow pulse signal of a flashover discharge in an embodiment of the present application;

[0046] Figure 3 This is a structural schematic diagram of a power supply device in an application example of the present application;

[0047] Figure 4 A schematic diagram of a flow chart of a control method of a power supply device according to an embodiment of the present application;

[0048] Figure 5 A flowchart of a control method of a power supply device in an application example of the present application;

[0049] Figure 6 This is a schematic diagram of the structure of an IFD filter installed on an air conditioner in an embodiment of the present application;

[0050] Figure 7 Schematic diagram of the electrode connection points of the IFD filter in an embodiment of the present application. DETAILED DESCRIPTION

[0051] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0053] The present application provides a power supply device for an electrostatic filter, which includes a first electrode and a second electrode that form an electric field for ionizing gas. The electrons, anions, and cations generated after the gas is ionized are adsorbed on the dust passing through the electric field, so that the dust acquires electric charge. Under the action of the electric field force, the dust with different charges moves to the electrodes with different polarities and deposits on the electrodes, thereby achieving the purpose of separating dust and gas. Figure 1 As shown, the power supply device includes: a boost circuit, a controller, a voltage detection circuit, a threshold voltage circuit, a cumulative detection circuit and a reset circuit. The boost circuit is used to boost the low voltage power supply and supply power to the first electrode of the electrostatic filter; the controller is connected to the control end of the boost circuit and is used to adjust the output voltage value of the boost circuit; the voltage detection circuit is arranged between the second electrode of the electrostatic filter and the ground terminal, and is used to convert the discharge current between the first electrode and the second electrode into a discharge voltage value; the threshold voltage circuit is connected to the output end of the voltage detection circuit and is used to perform conduction control based on the comparison result between the discharge voltage value and the set voltage value; the cumulative detection circuit is connected to the output end of the threshold voltage circuit and is used to generate the cumulative voltage value received from the threshold voltage circuit within a unit time length; the reset circuit is arranged between the output end of the cumulative detection circuit and the ground terminal, and is used to discharge and reset the cumulative detection circuit based on the unit time length.

[0054] It can be understood that the power supply device of the embodiment of the present application can effectively evaluate the cumulative number of flashover discharges of the electrostatic filter within a unit time period based on the cumulative voltage value generated by the cumulative detection circuit within a unit time period, thereby providing a reasonable basis for adjusting the driving voltage of the electrostatic filter, so that the driving voltage of the electrostatic filter can effectively ensure the dust removal and / or sterilization efficiency, reduce the impact on the service life of the electrode, and there is no need to increase the fan speed, thereby taking into account the user experience.

[0055] Here, flashover discharge refers to the breakdown between two electrodes along the surface of solid insulation in the gas under the action of high voltage electricity. Compared with arc discharge, it is a short-term and low-current phenomenon. Arc discharge refers to the gas discharge phenomenon that presents arc-shaped white light and generates high temperature.

[0056] For example, the narrow pulse signal of the flashover discharge is as follows: Figure 2 As shown, the duration of a single pulse signal is generally several hundred nanoseconds, which is difficult for the controller to capture, resulting in a lack of effective detection means for monitoring the number of flashover discharges in the relevant technology.

[0057] It should be pointed out that arc discharge will affect the service life of the electrode, while a certain number of flashover discharges within a unit time can greatly improve the working efficiency of the electrostatic filter. However, if the number of flashover discharges is too many, arc discharges are likely to occur, which in turn affects the service life of the electrostatic filter. Based on this, the embodiment of the present application can effectively evaluate the number of flashover discharges accumulated by the electrostatic filter within a unit time by using the cumulative voltage value generated by the cumulative detection circuit within a unit time, thereby providing a reasonable basis for adjusting the driving voltage of the electrostatic filter, so that the driving voltage of the electrostatic filter can effectively guarantee the dust removal and / or sterilization efficiency, and reduce the impact on the service life of the electrode, without increasing the fan speed, thereby taking into account the user experience.

[0058] Exemplarily, the power supply device further includes:

[0059] The voltage doubling circuit is arranged between the output side of the voltage boosting circuit and the first electrode.

[0060] It can be understood that in order to further increase the voltage value of the driving power supply, a voltage doubling circuit can be set between the output side of the boost circuit and the first electrode. The voltage doubling circuit can increase the voltage V1 output by the boost circuit. For example, assuming that the boost multiple of the voltage doubling circuit is N, the voltage signal output by the voltage doubling circuit is N*V1.

[0061] Here, the voltage doubling circuit can be constructed based on fast recovery diodes and capacitors, and the voltage is gradually increased by utilizing the unidirectional conductivity of the diode (the characteristics of the switch) and the energy storage characteristics of the capacitor, thereby generating double voltage, triple voltage, and multiple voltage rectifier circuits.

[0062] Exemplarily, the boost circuit includes: a transformer, a first switch tube for conducting control based on a pulse width modulation (PWM) signal output by the controller is arranged on the primary winding side of the transformer, and an output voltage value of the secondary winding of the transformer is adjusted based on the duty cycle of the PWM signal. In this way, the transformer can be used for boost conversion, and the voltage can be further boosted by the voltage doubling circuit to supply power to the first electrode of the electrostatic filter.

[0063] Exemplarily, the threshold voltage circuit includes a first zener diode, a cathode of the first zener diode is connected to an output end of the voltage detection circuit, and an anode of the first zener diode is connected to an input end of the accumulation detection circuit.

[0064] It can be understood that the above-mentioned first Zener diode is in a reverse biased state. In this state, before the reverse voltage (i.e., the discharge voltage value converted by the voltage detection circuit) reaches the set voltage value Vz, the first Zener diode is basically not turned on; and when the reverse voltage is close to the Vz value, the first Zener diode starts to turn on and generates Ir current.

[0065] Exemplarily, the power supply device further includes:

[0066] A rectifier diode is arranged between the threshold voltage circuit and the cumulative detection circuit, wherein the anode of the rectifier diode is connected to the output end of the threshold voltage circuit, and the cathode of the rectifier diode is connected to the input end of the cumulative detection circuit.

[0067] It can be understood that the rectifier diode can effectively prevent the reverse discharge of the cumulative detection circuit, thereby effectively avoiding the influence of the reverse discharge on the measurement result.

[0068] Exemplarily, the cumulative detection circuit includes:

[0069] An electrolytic capacitor, wherein the negative electrode of the electrolytic capacitor is grounded;

[0070] A second voltage stabilizing diode, wherein a cathode of the second voltage stabilizing diode is connected to a positive electrode of an electrolytic capacitor, and an anode of the second voltage stabilizing diode is connected to a negative electrode of the electrolytic capacitor.

[0071] It is understandable that the electrolytic capacitor can generate a cumulative voltage value after the threshold voltage circuit is turned on within a unit time. The second voltage stabilizing diode can effectively protect the electrolytic capacitor and the detection port of the controller through voltage stabilization control. It should be noted that the controller can obtain the cumulative voltage value of the electrolytic capacitor based on the detection port, and then evaluate the number of flashover discharges within a unit time based on the cumulative voltage value.

[0072] Exemplarily, the reset circuit includes:

[0073] A second switch tube, wherein the control end of the second switch tube is connected to the controller, and the controller generates a driving signal based on the unit time length to control the second switch tube to be turned on, so that the cumulative detection circuit is discharged and reset. In this way, the cumulative detection circuit can be discharged and reset periodically based on the driving signal of the controller.

[0074] The power supply device of the embodiment of the present application is illustrated below with reference to an application example.

[0075] like Figure 3 As shown, in this application example, the MCU (Microcontroller Unit) controls the duty cycle of the switch tube Q1 to realize the secondary output voltage V0 of the transformer T1. The output voltage V0 generates a 2*V0 voltage through a voltage doubling circuit and is loaded onto the first electrode, forming a current I0 between the first electrode and the second electrode.

[0076] The current I0 flows through the resistor R4 inside the voltage detection circuit to generate a discharge voltage V1. When the discharge voltage V1 is higher than the threshold voltage of the first voltage stabilizing diode DZ1 (for example, 2.7V), it flows into the electrolytic capacitor E4 through the rectifier diode, and the voltage of the electrolytic capacitor E4 is increased after charging. Among them, the role of the second voltage stabilizing diode DZ2 is to protect the electrolytic capacitor E4 and the IO port of the MCU, and the role of the diode D4 is to prevent the electrolytic capacitor E4 from reversely discharging to the resistor R4 and thus affecting the measurement result.

[0077] After the unit time is accumulated, the MCU can control the switch tube Q2 to conduct, so that the electrolytic capacitor E4 discharges, and the voltage across the electrolytic capacitor E4 is pulled down to close to 0V, so as to achieve the reset of the cumulative detection circuit, and then the cumulative voltage value generated by the cumulative detection circuit within the unit time can be periodically obtained, and the number of flashover discharges accumulated within the unit time can be evaluated based on the cumulative voltage value, thereby providing a reasonable basis for adjusting the driving voltage of the electrostatic filter. The unit time can be reasonably determined based on demand, and for example, the unit time can be one minute.

[0078] The present application also provides a control method based on the aforementioned power supply device, such as Figure 4 As shown, the method includes:

[0079] Step 401: Obtain a first accumulated voltage value generated by the accumulation detection circuit based on the unit time length.

[0080] Step 402: adjusting the output voltage value of the boost circuit based on a comparison result between the first accumulated voltage value and a set voltage threshold.

[0081] It can be understood that the control method of the embodiment of the present application can evaluate the cumulative number of flashover discharges within the unit time length based on the first cumulative voltage value by obtaining the first cumulative voltage value generated by the cumulative detection circuit based on the unit time length, wherein the first cumulative voltage value is positively correlated with the cumulative number of flashover discharges within the unit time length, that is, the first cumulative voltage value increases with the increase of the cumulative number of flashover discharges within the unit time length, and decreases with the decrease of the cumulative number of flashover discharges, and based on the comparison result between the first cumulative voltage value and the set voltage threshold, the output voltage value of the boost circuit is adjusted, thereby realizing feedback control of the output voltage value, which can make the driving power supply of the electrostatic filter operate in the critical state before arc discharge, thereby optimizing its working efficiency and taking into account both service life and user experience.

[0082] Exemplarily, adjusting the output voltage value of the boost circuit based on a comparison result between the first accumulated voltage value and a set voltage threshold value includes:

[0083] If it is determined that the first accumulated voltage value is less than or equal to the lower limit value of the set voltage threshold, then increasing the output voltage value of the boost circuit;

[0084] If it is determined that the first accumulated voltage value is greater than or equal to the upper limit value of the set voltage threshold, the output voltage value of the boost circuit is lowered.

[0085] It can be understood that the set voltage threshold includes an upper limit value and a lower limit value. If the first cumulative voltage value obtained is in the interval between the upper limit value and the lower limit value, the current driving voltage can be maintained. If it is determined that the first cumulative voltage value is less than or equal to the lower limit value, the output voltage value of the boost circuit can be increased, thereby improving the working efficiency of the electrostatic filter; if it is determined that the first cumulative voltage value is greater than or equal to the upper limit value, the output voltage value of the boost circuit can be lowered, thereby effectively avoiding the influence of arc discharge on the service life of the electrode.

[0086] Exemplarily, the control method further includes:

[0087] Based on a set time period, periodically acquiring a second accumulated voltage value of the accumulated detection circuit;

[0088] If it is determined that the second accumulated voltage value is greater than or equal to a set value, then lowering the output voltage value of the boost circuit;

[0089] The set duration is smaller than the unit duration.

[0090] Here, based on the set duration, the second cumulative voltage value of the cumulative detection circuit is periodically obtained, that is, the second cumulative voltage value of the cumulative detection circuit is obtained at each set duration, and the second cumulative voltage value is used to detect whether arc discharge occurs in the electrostatic filter. Specifically, the second cumulative voltage value is compared with the set value. If the second cumulative voltage value is greater than or equal to the set value, it is determined that there is a risk of arc discharge, and the output voltage value of the boost circuit is lowered, thereby effectively avoiding the impact of arc discharge on the service life of the electrode. It can be understood that since the set duration is less than the unit duration, it is possible to monitor whether there is an arc discharge more quickly, and the occurrence of arc discharge can be more effectively avoided.

[0091] The control method of the power supply device in the embodiment of the present application is illustrated below with reference to an application example.

[0092] In this application example, Figure 3 The power supply device shown, such as Figure 5 As shown, the control method includes:

[0093] Step 501, MCU controls D to generate V0 voltage.

[0094] Here, the MCU controls the duty cycle D of the switch tube Q1 to achieve the secondary output voltage V0 of the transformer T1.

[0095] Step 502: The voltage V0 is doubled to generate a voltage 2*V0.

[0096] Here, the output voltage V0 is converted into a voltage of 2*V0 by a voltage doubling circuit.

[0097] Step 503, 2*V0 is loaded to the electrode to generate current I0.

[0098] Here, the 2*V0 voltage generated by the voltage doubling circuit is applied to the first electrode, and a current I0 is formed between the first electrode and the second electrode.

[0099] In step 504, I0 is converted into voltage via current conversion to generate voltage V1.

[0100] Here, the current I0 flows through the resistor R4 inside the voltage detection circuit, generating a discharge voltage V1.

[0101] Step 505, when flashover discharge occurs, the voltage of V1 is higher than the threshold voltage and flows through the rectifier diode to both ends of the electrolytic capacitor.

[0102] Here, when the discharge voltage V1 is higher than the threshold voltage (eg, 2.7V) of the first voltage stabilizing diode DZ1, it flows into the electrolytic capacitor E4 through the rectifying diode, and the voltage of the electrolytic capacitor E4 increases after being charged.

[0103] Step 506, determine whether the 0.5 second time has expired, if so, execute step 507, if not, execute step 509.

[0104] Here, 0.5 seconds is the aforementioned set time length. If 0.5 seconds is reached, the drive voltage is feedback-controlled based on the comparison result between the second accumulated voltage value and the set value.

[0105] Step 507 , determining whether the voltage across the capacitor is ≥5V, if so, executing step 508 .

[0106] Step 508: Arc discharge occurs, and the MCU immediately reduces the V0 voltage.

[0107] It can be understood that if the voltage across the electrolytic capacitor is ≥5V, the MCU adjusts the duty cycle D to lower the V0 voltage to avoid the continuous occurrence of arc discharge.

[0108] Step 509, determine whether the 1 minute timer has expired, if so, execute step 510.

[0109] Here, 1 minute is the aforementioned unit time length. When 1 minute is reached, feedback control is performed on the driving voltage based on the comparison result between the first accumulated voltage value and the set voltage threshold.

[0110] Step 510 , determining whether the voltage across the capacitor is ≤1V, if so, executing step 511 , if not, executing step 512 .

[0111] Step 511, increase the voltage of V0 and reset the detection circuit.

[0112] Here, if the first accumulated voltage value is less than or equal to the lower limit value of the set voltage threshold, the output voltage value of the boost circuit can be increased.

[0113] Step 512, determine whether the voltage across the capacitor is ≥ 3V, if so, execute step 513.

[0114] Step 513, lowering the voltage of V0 to reset the detection circuit.

[0115] Here, if the first accumulated voltage value is greater than or equal to the upper limit value, the output voltage value of the boost circuit can be adjusted down.

[0116] It can be understood that the control method of this application example controls the driving voltage of the electrostatic filter by detecting the cumulative number of flashover discharges, so that it works in a critical state to achieve maximum sterilization and / or filtration efficiency, while at the same time being able to protect the electrode well and improve its life and reliability.

[0117] It can be understood that the control method of the power supply device in the embodiment of the present application can be implemented by a controller configuration program of the power supply device.

[0118] The embodiment of the present application also provides an electronic device, which includes an electrostatic filter and the power supply device described in the embodiment of the present application. In this way, the electrostatic filter can be controlled to work based on the driving voltage provided by the power supply device, so that the driving voltage of the electrostatic filter can effectively ensure the dust removal and / or sterilization efficiency, and reduce the impact on the service life of the electrode, without increasing the fan speed, thereby taking into account the user experience.

[0119] Exemplarily, the electronic device may be an air conditioner. The air conditioner is used to adjust the temperature, humidity, etc. of the environment. The air conditioner may be a cooling-only air conditioner or a cooling-heating dual-purpose air conditioner. The air conditioner may be a wall-mounted air conditioner, a cabinet-type air conditioner, a window-type air conditioner, or a ceiling-mounted air conditioner, etc., which is not specifically limited in the embodiments of the present application.

[0120] For example, Figure 6 As shown, the electrostatic filter may be an IFD filter 100 disposed on the air inlet side of the air conditioner, and the IFD filter is electrically connected to the power supply device 200 of the embodiment of the present application. Figure 7 As shown, the IFD filter includes two electrode connection points 101, and the two electrical connection points 101 are electrically connected to the power supply device 200 of the embodiment of the present application.

[0121] Here, the IFD filter can achieve air purification and sterilization. The IFD filter includes a discharged field charge plate, on which air flow channels for air to pass are evenly distributed. When energized, the air flow channels generate discharges, causing dust particles passing through them to be charged and generate plasma. The plasma has the ability to destroy virus tissue cells, thereby playing a sterilization role.

[0122] It can be understood that in the embodiment of the present application, based on the feedback control of the driving voltage, the driving power supply operates in a critical state before the arc discharge of the IFD filter, thereby making the sterilization efficiency of the IFD filter better, and taking into account the service life of the IFD filter and the user experience.

[0123] In an exemplary embodiment, the present application embodiment further provides a storage medium, namely a computer storage medium, which can be a computer-readable storage medium, for example, a memory storing a computer program, and the computer program can be executed by a microprocessor of the streamer sterilization device to complete the steps described in the method of the present application embodiment. The computer-readable storage medium can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a magnetic random access memory (FRAM), a flash memory, a magnetic surface memory, an optical disc, or a compact disc read-only memory (CD-ROM); the magnetic surface memory can be a disk memory or a tape memory.

[0124] It should be noted that: "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0125] In addition, the technical solutions described in the embodiments of the present application can be combined arbitrarily without conflict.

[0126] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A power supply device for an electrostatic filter, characterized in that: The power supply device comprises: A boost circuit, used for boosting the low voltage power supply and supplying power to the first electrode of the electrostatic filter; A controller connected to the control end of the boost circuit and used to adjust the output voltage value of the boost circuit; a voltage detection circuit, disposed between the second electrode of the electrostatic filter and a ground terminal, for converting a discharge current between the first electrode and the second electrode into a discharge voltage value; A threshold voltage circuit, connected to the output end of the voltage detection circuit, for performing conduction control based on a comparison result between the discharge voltage value and a set voltage value; A cumulative detection circuit, connected to the output end of the threshold voltage circuit, for generating a cumulative voltage value received from the threshold voltage circuit within a unit time length; The reset circuit is arranged between the output terminal of the cumulative detection circuit and the ground terminal, and is used for discharging and resetting the cumulative detection circuit based on the unit time length.

2. The power supply device according to claim 1, characterized in that: The power supply device also includes: The voltage doubling circuit is arranged between the output side of the voltage boosting circuit and the first electrode.

3. The power supply device according to claim 1, characterized in that: The boost circuit includes: a transformer, a first switch tube for conducting control based on a pulse width modulation (PWM) signal output by the controller is arranged on the primary winding side of the transformer, and an output voltage value of the secondary winding of the transformer is adjusted based on the duty cycle of the PWM signal.

4. The power supply device according to claim 1, characterized in that: The threshold voltage circuit includes a first voltage regulator diode, a cathode of the first voltage regulator diode is connected to the output end of the voltage detection circuit, and an anode of the first voltage regulator diode is connected to the input end of the accumulation detection circuit.

5. The power supply device according to claim 1 or 4, characterized in that: The power supply device also includes: A rectifier diode is arranged between the threshold voltage circuit and the cumulative detection circuit, wherein the anode of the rectifier diode is connected to the output end of the threshold voltage circuit, and the cathode of the rectifier diode is connected to the input end of the cumulative detection circuit.

6. The power supply device according to claim 1, characterized in that: The cumulative detection circuit comprises: An electrolytic capacitor, wherein a negative electrode of the electrolytic capacitor is grounded; A second voltage stabilizing diode, wherein a cathode of the second voltage stabilizing diode is connected to a positive electrode of an electrolytic capacitor, and an anode of the second voltage stabilizing diode is connected to a negative electrode of the electrolytic capacitor.

7. The power supply device according to claim 1, characterized in that: The reset circuit comprises: A second switch tube, wherein a control end of the second switch tube is connected to the controller, and the controller generates a driving signal based on the unit time length to control the second switch tube to be turned on, so that the cumulative detection circuit is discharged and reset.

8. A control method for a power supply device according to any one of claims 1 to 7, characterized in that: include: Acquire a first accumulated voltage value generated by the accumulated detection circuit based on the unit time length; Based on a comparison result between the first accumulated voltage value and a set voltage threshold, an output voltage value of the voltage boosting circuit is adjusted.

9. The method according to claim 8, characterized in that The step of adjusting the output voltage value of the boost circuit based on the comparison result between the first accumulated voltage value and the set voltage threshold value comprises: If it is determined that the first accumulated voltage value is less than or equal to the lower limit value of the set voltage threshold, then increasing the output voltage value of the boost circuit; If it is determined that the first accumulated voltage value is greater than or equal to the upper limit value of the set voltage threshold, the output voltage value of the boost circuit is lowered.

10. The method according to claim 8, characterized in that The method further comprises: Based on a set time period, periodically acquiring a second accumulated voltage value of the accumulated detection circuit; If it is determined that the second accumulated voltage value is greater than or equal to a set value, then lowering the output voltage value of the boost circuit; The set duration is smaller than the unit duration.

11. A power supply device according to any one of claims 1 to 7, characterized in that: The controller is configured to perform the steps of the method according to any one of claims 8 to 10.

12. An electronic device, characterized in that: include: An electrostatic filter and a power supply device as claimed in claim 11.

13. The electronic device according to claim 12, characterized in that: The electronic device is an air conditioner, and the electrostatic filter is a strong field dielectric IFD filter arranged on the air inlet side of the air conditioner.

14. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 8 to 10 are implemented.

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