Air treatment equipment, air purification device and control method

Abstract

The invention discloses air treatment equipment, an air purification device and a control method, and the air purification device comprises a shell provided with an air flow channel; the fan is arranged to be capable of driving air in the air flow channel to flow along the air flow channel; the electrostatic dust collection module is arranged in the air flow channel and comprises a first dust collection electrode and a second dust collection electrode, and the first dust collection electrode and the second dust collection electrode are arranged at an interval; the control module is electrically connected to the electrostatic dust collection module and the fan, and is configured to load alternating voltage between the first dust collection electrode and the second dust collection electrode on the basis of entering a self-cleaning mode so as to ionize particulate matters adsorbed on the electrostatic dust collection module and enable the particulate matters to be separated from the electrostatic dust collection module; and controlling the fan to drive air in the air flow channel to flow along the air flow channel. The air purification device can effectively remove dust adsorbed on the electrostatic dust collection module during self-cleaning.

Description

Technical Field

[0001] The present invention relates to air purification technology, and more particularly to an air treatment device, an air purification device and a control method. Background Art

[0002] As people's requirements for quality of life become higher and higher, people use fresh air filters to improve indoor air quality. Fresh air filters can filter out tiny particles such as dust, pollen, bacteria, and viruses in the air, thereby reducing the concentration of pollutants in the indoor air and allowing people to breathe fresher and healthier air. In addition, fresh air filters can also effectively prevent excessive indoor carbon dioxide concentrations, thereby improving people's work and study efficiency.

[0003] Some existing fresh air filters have a self-cleaning function, and dust on the fresh air filter is removed after the self-cleaning function is turned on. In an existing fresh air duct self-cleaning technology, dust and foreign matter on the filter and in the duct are discharged by reverse air supply, but the cleaning effect of this self-cleaning technology is poor, and dust and bacteria adsorbed on the filter are difficult to remove. Summary of the invention

[0004] The present application proposes an air purification device, which comprises:

[0005] The housing is provided with an air flow channel;

[0006] A fan, configured to drive the air in the air flow channel to flow along the air flow channel;

[0007] an electrostatic dust collecting module, arranged in the airflow channel, comprising a first dust collecting electrode and a second dust collecting electrode spaced apart from the first dust collecting electrode; and

[0008] The control module is electrically connected to the electrostatic dust collection module and the fan, and is configured to load an alternating voltage between the first dust collection electrode and the second dust collection electrode to ionize the particles adsorbed on the electrostatic dust collection module and separate the particles from the electrostatic dust collection module based on entering a self-cleaning mode, and control the fan to drive the air in the airflow channel to flow along the airflow channel.

[0009] In an illustrative embodiment, the control module alternately loads voltage pulses of the same electrical property on the first dust collecting electrode and the second dust collecting electrode, and when one of the first dust collecting electrode and the second dust collecting electrode is loaded with a voltage pulse, the other of the first dust collecting electrode and the second dust collecting electrode is grounded to achieve loading of an alternating voltage between the first dust collecting electrode and the second dust collecting electrode.

[0010] In an illustrative embodiment, the control module applies a voltage pulse having a frequency of 200 to 300 Hz to the first dust collecting electrode and the second dust collecting electrode;

[0011] The amplitude of the voltage pulse is 8 to 12 kV;

[0012] The pulse width of the voltage pulse is 0.1-0.2 ms.

[0013] In an illustrative embodiment, the waveform of the voltage pulse is a rectangular wave; and / or

[0014] The voltage pulse is a negative voltage pulse.

[0015] In an illustrative embodiment, the first dust collecting electrode comprises a plurality of mutually parallel first conductive strips;

[0016] The second dust collecting electrode comprises a plurality of second conductive strips which are all parallel to the first conductive strips;

[0017] The first conductive strips and the second conductive strips are alternately arranged in a direction perpendicular to the first conductive strips, and there is a gap between adjacent first conductive strips and second conductive strips for air flow to pass through.

[0018] In an illustrative embodiment, the air purification device further comprises a charging module disposed in the air flow channel;

[0019] The control module is electrically connected to the charging module, and the control module is further configured to control the charging module to ionize air based on entering the self-cleaning mode;

[0020] In the self-cleaning mode, the fan drives the air in the airflow channel to flow through the electrostatic dust collection module and the charging module in sequence.

[0021] In an illustrative embodiment, the control module is also configured to control the fan to drive the air in the airflow channel to flow through the charging module and the electrostatic dust collection module in sequence based on entering the purified air mode, control the charging module to ionize the air so that the particles in the air are charged, and load a constant DC voltage between the first dust collecting electrode and the second dust collecting electrode to adsorb the charged particles.

[0022] In an illustrative embodiment, the charging module includes a first charging electrode and a second charging electrode spaced apart from the first charging electrode;

[0023] Wherein, the second charged electrode is grounded, and the control module outputs a pulse voltage signal to the first charged electrode, so that plasma is generated between the first charged electrode and the second charged electrode.

[0024] In an illustrative embodiment, the frequency of the pulse voltage signal is 8 to 12 kHz;

[0025] The pulse width of the pulse voltage signal is 80 to 120 μs;

[0026] The amplitude of the pulse voltage signal is 8-12 kV.

[0027] In an illustrative embodiment, the waveform of the pulse voltage signal is a rectangular wave, a sharp wave, a sawtooth wave, a bell wave, a trapezoidal wave or a triangle wave.

[0028] In an exemplary embodiment, the second charged electrode is cylindrical, and the outer peripheral wall of the second charged electrode abuts against the inner peripheral wall of the airflow channel;

[0029] The first charged electrode is disposed inside the second charged electrode and is configured as a straight bar coaxial with the second charged electrode. One end of the first charged electrode is configured as a discharge tip.

[0030] In an exemplary embodiment, the discharge tip faces an end of the second charged electrode facing the wind.

[0031] In an exemplary embodiment, the second charged electrode is cylindrical, and the outer peripheral wall of the second charged electrode abuts against the inner peripheral wall of the airflow channel;

[0032] There are a plurality of first charged electrodes, each of which is disposed inside the second charged electrode, and each of which is provided with a discharge tip;

[0033] The control module applies voltage pulses to the plurality of first charged electrodes in turn so that the discharge tips of the plurality of first charged electrodes discharge in turn.

[0034] In an illustrative embodiment, the first charged electrode is configured as a strip, and the discharge tip is disposed at one end of the first charged electrode;

[0035] Ends of the plurality of first charged electrodes facing away from the discharge tip are close to each other, and the discharge tips of the plurality of first charged electrodes face different directions.

[0036] The present application also proposes a control method for an air purification device, the control method comprising:

[0037] Based on entering the self-cleaning mode, an alternating voltage is loaded between the first dust collecting electrode and the second dust collecting electrode to ionize the particles adsorbed on the electrostatic dust collecting module and separate the particles from the electrostatic dust collecting module, and the fan is controlled to drive the air in the airflow channel to flow along the airflow channel.

[0038] The present application also proposes an air treatment device, which includes the air purification device as described above.

[0039] After entering the self-cleaning mode, the control module loads an alternating voltage between the first dust collecting electrode and the second dust collecting electrode of the electrostatic dust collecting module, so that an electric field with alternating directions is generated between the first dust collecting electrode and the second dust collecting electrode. The electrical properties of the particles adsorbed on the first dust collecting electrode and the second dust collecting electrode are usually neutral, and under the action of the electric field, the particles adsorbed on the first dust collecting electrode and the second dust collecting electrode are ionized and charged. The charged particles will detach from the dust collecting electrodes they are adsorbed on under the action of the electric field with alternating directions. At the same time, the fan also drives the air in the airflow flow channel to flow along the airflow flow channel. The airflow in the airflow flow channel can blow the particles detached from the dust collecting electrodes to the outside of the airflow flow channel, thereby effectively removing the dust adsorbed on the electrostatic dust collecting module and extending the maintenance cycle.

[0040] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or be understood by implementing the present application. Other advantages of the present application can be realized and obtained by the schemes described in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The accompanying drawings are used to provide an 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.

[0042] Figure 1 A schematic front view of an air purification device according to an embodiment of the present application;

[0043] Figure 2 A three-dimensional schematic diagram of an air purification device according to an embodiment of the present application;

[0044] Figure 3 A full cross-sectional schematic diagram of an air purification device according to an embodiment of the present application;

[0045] Figure 4 A simplified schematic diagram of an air purification device according to an embodiment of the present application;

[0046] Figure 5 This is a flow chart of a control method for an air purification device according to an embodiment of the present application;

[0047] Figure 6 A schematic front view of an electrostatic dust collection module according to an embodiment of the present application;

[0048] Figure 7A rear view schematic diagram of an electrostatic dust collection module according to an embodiment of the present application;

[0049] Figure 8 is a schematic diagram of a first charging module according to an embodiment of the present application;

[0050] Fig. 9 is a schematic diagram of a second charging module according to an embodiment of the present application;

[0051] Fig.10 A schematic front view of a third charging module according to an embodiment of the present application;

[0052] Fig.11 for Fig.10 A left schematic diagram of the third charging module in FIG.

[0053] Fig.12 It is a left schematic diagram of a fourth charging module according to an embodiment of the present application;

[0054] Fig.13 It is a left schematic diagram of a fifth charging module according to an embodiment of the present application;

[0055] Fig.14 It is a left schematic diagram of a sixth charging module according to an embodiment of the present application;

[0056] Fig.15 A schematic diagram of the waveform of the voltage loaded on the first dust collecting electrode and the second dust collecting electrode in the embodiment of the present application;

[0057] Fig.16 Schematic diagram of the waveform of the voltage applied to the first charged electrode in the embodiment of the present application.

[0058] Reference numerals:

[0059] 100. Air purification device; 1. Charging module; 111. First charging electrode; 1111. Discharging tip; 112. Second charging electrode; 113. Insulating bracket; 2. Electrostatic dust collecting module; 21. First dust collecting electrode; 211. First conductive strip; 212. First conductive column; 22. Second dust collecting electrode; 221. First conductive strip; 222. Second conductive column; 23. Insulating frame; 3. Shell; 31. Air flow channel; 32. Air inlet; 33. Air outlet; 4. Fan 4. DETAILED DESCRIPTION

[0060] This embodiment proposes an air treatment device, which can take in and out air, and has unlimited air treatment functions, for example, it can perform at least one of the following treatment functions: temperature adjustment, humidification, purification, circulation, etc. The air treatment device includes but is not limited to an air conditioner, and the air treatment device can also be a purifier, a humidifier, a fan, etc. After the specific type of the air treatment device is determined, those skilled in the art can know the composition of the air treatment device to realize the air treatment function, which will not be described in detail here.

[0061] The air handling equipment includes a casing, an air supply fan and an air purification device. The casing is provided with an air inlet, an air outlet and an air duct. The two ends of the air duct are respectively connected to the air inlet and the air outlet. The air supply fan is arranged in the air duct. The air supply fan can be a cross-flow fan or a centrifugal fan. After the air supply fan is started, it can drive the air in the air duct to move from the air inlet to the air outlet, so that the air inlet sucks the air in the surrounding environment into the air duct, and the air is discharged from the air outlet to the surrounding environment after flowing through the air duct. The air outlet can be openable and closable, for example, a movable damper or air guide plate can be provided at the air outlet to open or close the air outlet. The air purification device is arranged on the casing.

[0062] like Figures 1 to 3 As shown, Figures 1 to 3 The structure of an air purification device 100 in this embodiment is shown. The air purification device 100 includes a housing 3, a charging module 1, an electrostatic dust collection module 2, a fan 4 and a control module.

[0063] The shell 3 can be made of insulating material, such as plastic. The shell 3 is provided with an airflow channel 31, an air inlet 32 ​​and an air outlet 33. The air inlet 32 ​​and the air outlet 33 are respectively arranged at opposite ends of the airflow channel 31. The air inlet 32 ​​can input the air to be purified into the airflow channel 31. The air inlet 32 ​​can be connected to the outdoors. The air to be purified is input from the air inlet 32, and is output from the air outlet 33 after flowing through the airflow channel 31. The air outlet 33 of the shell 3 can be an air inlet, an air outlet or an air duct connected to the air treatment device. The air outlet 33 of the shell 3 can also be arranged outside the casing of the air treatment device.

[0064] like Figure 4 As shown, the charging module 1 is arranged in the air flow channel 31. The charging module 1 can be arranged near the air inlet 32. The charging module 1 can be a plasma generator that can ionize air to generate plasma. The charging module 1 can be a negative ion generator that can ionize air to generate negative ions.

[0065] When the charging module 1 ionizes the air, it can generate charged particles such as positive ions and negative ions in the air. These charged particles diffuse into the particles in the air and can be adsorbed by the particles, making the particles carry static charges. The particles in the air include fine particles, bacteria, pollen, floating dust, etc. Fine particles refer to particles in the air with an aerodynamic equivalent diameter of less than or equal to 2.5 microns. The particles can be positively charged by adsorbing positive ions, or negatively charged by adsorbing negative ions. Microorganisms such as bacteria can be killed by charged particles.

[0066] The electrostatic dust collecting module 2 is arranged in the air flow channel 31, and the electrostatic dust collecting module 2 is located downstream of the charging module 1. The electrostatic dust collecting module 2 is closer to the air outlet 33 than the charging module 1. The electrostatic dust collecting module 2 is provided with gaps or meshes for air flow to pass through. The electrostatic dust collecting module 2 can apply an electrostatic field, and the charged particles are adsorbed by the electrostatic dust collecting module 2 under the action of the electrostatic field. The electrostatic dust collecting module 2 includes a first dust collecting electrode 21 and a second dust collecting electrode 22. A gap is provided between the first dust collecting electrode 21 and the second dust collecting electrode 22, and air passes through the gap.

[0067] When a constant DC voltage is applied between the first dust collecting electrode 21 and the second dust collecting electrode 22, an electrostatic field is generated between the first dust collecting electrode 21 and the second dust collecting electrode 22. When charged particles in the air pass through the gap between the first dust collecting electrode 21 and the second dust collecting electrode 22, the positively charged particles move toward the second dust collecting electrode 22 under the action of the electrostatic field and are adsorbed onto the second dust collecting electrode 22, and the negatively charged particles move toward the first dust collecting electrode 21 under the action of the electrostatic field and are adsorbed onto the first dust collecting electrode 21. The electrostatic dust collecting module 2 may be an electrostatic dust collecting net.

[0068] When an alternating voltage is applied between the first dust collecting electrode 21 and the second dust collecting electrode 22, an electric field with an alternating direction is generated between the first dust collecting electrode 21 and the second dust collecting electrode 22, and the electric field can ionize the particles adsorbed on the electrostatic dust collecting module 2 to charge the particles, and the charged particles are separated from the electrostatic dust collecting module 2 under the action of the electric field with an alternating direction. For example, after the particles on the first dust collecting electrode 21 and the second dust collecting electrode 22 are ionized, they are separated from the dust collecting electrode (for example, the first dust collecting electrode 21 or the second dust collecting electrode 22) to which the particles are adsorbed under the action of the electric field with an alternating direction.

[0069] The fan 4 may be arranged in the air flow channel 31 of the housing 3. The fan 4 may also be arranged outside the housing 3, and the fan 4 is connected to the air inlet 32 ​​or the air outlet 33 of the housing 3. The fan 4 can rotate forward and reverse. When the fan 4 rotates forward, it can drive the air in the air flow channel 31 to flow through the charging module 1 and the electrostatic dust collection module 2 in sequence. At this time, the air inlet 32 ​​inhales the air and the air outlet 33 discharges the air. When the fan 4 reverses, it can drive the air in the air flow channel 31 to flow through the electrostatic dust collection module 2 and the charging module 1 in sequence. At this time, the air outlet 33 inhales the air and the air inlet 32 ​​discharges the air.

[0070] In this embodiment, the fan 4 is arranged in the air flow channel 31 and is located downstream of the electrostatic dust collection module 2. The fan 4 rotates forward to generate negative pressure at the air inlet 32 ​​to inhale the air to be purified. The air to be purified is purified after passing through the charging module 1 and the electrostatic dust collection module 2, and the air outlet 33 discharges the purified air. The fan 4 is arranged downstream of the electrostatic dust collection module 2, which can also prevent dust from accumulating on the fan 4.

[0071] The control module includes a power module and a controller. The controller is a logic control unit of the air purification device. The controller can be a single chip microcomputer. The controller is electrically connected to the fan 4 and the power module. The power module is electrically connected to the electrostatic dust collection module 2 and the charging module 1 through a wire. The power module can provide high voltage electricity to the electrostatic dust collection module 2 and the charging module 1 to drive the electrostatic dust collection module 2 and the charging module 1 to operate. The power module can be a high voltage controller. The power module can deliver a high DC voltage to the charging module 1. The power module can deliver a constant high DC voltage to the electrostatic dust collection module 2, and can also deliver a high alternating voltage to the electrostatic dust collection module 2. The controller can switch the voltage type delivered to the electrostatic dust collection module 2 by controlling the power module. The controller is also electrically connected to the fan 4, and can control the start and stop and forward and reverse rotation of the fan 4.

[0072] like Figure 5 As shown, this embodiment also proposes a control method of the air purification device 100, and the control method is implemented based on the above-mentioned air purification device 100. The control method includes:

[0073] Step S1: The control module receives a self-cleaning instruction, enters a self-cleaning mode, and proceeds to step S2;

[0074] In this embodiment, the air purification device 100 has a self-cleaning mode. The user can send a self-cleaning instruction to the air purification device 100 through a remote controller or a mobile terminal to turn on the self-cleaning mode of the air purification device 100. The mobile terminal can be a mobile phone or a tablet computer.

[0075] Step S2: The control module loads an alternating voltage between the first dust collecting electrode 21 and the second dust collecting electrode 22 of the electrostatic dust collecting module 2 to ionize the particles adsorbed on the first dust collecting electrode 21 or the second dust collecting electrode 22 and separate the particles from the dust collecting electrode where they are located, and controls the fan 4 to drive the air in the airflow channel 31 to flow along the airflow channel 31;

[0076] After entering the self-cleaning mode, the control module loads an alternating voltage between the first dust collecting electrode 21 and the second dust collecting electrode 22 of the electrostatic dust collecting module 2, so that an electric field with an alternating direction is generated between the first dust collecting electrode 21 and the second dust collecting electrode 22. The electrical properties of the particles adsorbed on the first dust collecting electrode 21 and the second dust collecting electrode 22 are usually neutral, and under the action of the electric field, the particles adsorbed on the first dust collecting electrode 21 and the second dust collecting electrode 22 are ionized and charged. The charged particles will be separated from the dust collecting electrodes adsorbed by them under the action of the electric field with alternating direction. At the same time, the fan 4 also drives the air in the airflow channel 31 to flow along the airflow channel 31. The airflow in the airflow channel 31 can blow the particles separated from the dust collecting electrodes and foreign matter in the airflow channel 31 to the outside of the airflow channel 31, thereby effectively cleaning the dust adsorbed on the electrostatic dust collecting module 2.

[0077] In an illustrative embodiment, the control module alternately loads voltage pulses of the same electrical property on the first dust collecting electrode 21 and the second dust collecting electrode 22. When the control module loads a voltage pulse on one of the first dust collecting electrode 21 and the second dust collecting electrode 22, the other dust collecting electrode 21 and the second dust collecting electrode 22 is grounded, thereby enabling the control module to load an alternating voltage between the first dust collecting electrode 21 and the second dust collecting electrode 22.

[0078] The voltage pulses loaded by the control module onto the first dust collecting electrode 21 and the second dust collecting electrode 22 are all negative voltage pulses, or are all positive voltage pulses. In the present embodiment, the voltage pulses loaded onto the first dust collecting electrode 21 and the second dust collecting electrode 22 are all negative voltage pulses.

[0079] When a negative voltage pulse is loaded onto the first dust collecting electrode 21 and the second dust collecting electrode 22 is grounded, the first dust collecting electrode 21 is a negative electrode, the second dust collecting electrode 22 is a positive electrode, and the electric field direction of the electric field generated between the first dust collecting electrode 21 and the second dust collecting electrode 22 is from the second dust collecting electrode 22 to the first dust collecting electrode 21; when a negative voltage pulse is loaded onto the second dust collecting electrode 22 and the first dust collecting electrode 21 is grounded, the first dust collecting electrode 21 is a positive electrode, the second dust collecting electrode 22 is a negative electrode, and the electric field direction of the electric field generated between the first dust collecting electrode 21 and the second dust collecting electrode 22 is from the first dust collecting electrode 21 to the second dust collecting electrode 22. The control module alternately loads negative voltage pulses on the first dust collecting electrode 21 and the second dust collecting electrode 22, and the direction of the electric field alternately switches between the direction from the second dust collecting electrode 22 to the first dust collecting electrode 21 and the direction from the first dust collecting electrode 21 to the second dust collecting electrode 22.

[0080] In some embodiments, the power module includes a first boost circuit and a first rectifier circuit. The first boost circuit is used to boost the input AC voltage and transmit it to the first rectifier circuit, and the first rectifier circuit is used to rectify the input high-voltage AC voltage into a high-voltage DC voltage for output. The first rectifier circuit includes a first output terminal and a second output terminal. The first output terminal outputs a positive voltage, and the second output terminal outputs a negative voltage. The first output terminal is grounded. Fig.15 As shown, the controller controls the first output terminal and the second output terminal to be alternately electrically connected to the first dust collecting electrode 21, and when one of the first output terminal and the second output terminal is electrically connected to the first dust collecting electrode 21, the other of the first output terminal and the second output terminal is electrically connected to the second dust collecting electrode 22. In this way, the power module can alternately load negative voltage pulses on the first dust collecting electrode 21 and the second dust collecting electrode 22.

[0081] In an illustrative embodiment, when the control module loads an alternating voltage between the first dust collecting electrode 21 and the second dust collecting electrode 22, the frequency of the voltage pulse loaded by the control module on the first dust collecting electrode 21 is 200-300Hz, and the frequency of the voltage pulse loaded by the control module on the second dust collecting electrode 22 is 200-300Hz. The amplitude of the voltage pulse loaded on the first dust collecting electrode 21 and the second dust collecting electrode 22 is 8-12kV, preferably 10kV. The pulse width of the voltage pulse loaded on the first dust collecting electrode 21 and the second dust collecting electrode 22 is 0.1-0.2ms.

[0082] When the voltage pulse parameter is within the above range, the particulate matter can quickly separate from the electrostatic dust collection module 2, which has a better cleaning effect on the electrostatic dust collection module 2.

[0083] In an illustrative embodiment, the waveform of the voltage pulse applied to the first dust collecting electrode 21 and the second dust collecting electrode 22 is a rectangular wave.

[0084] The rising and falling edges of the rectangular wave are very steep, the rising time and the falling time are very short, the voltage changes very quickly, and the electric field force exerted by the electric field on the charged particles changes rapidly, which is more conducive to the particles leaving the electrostatic dust collection module 2 and improving the cleaning effect.

[0085] In an illustrative embodiment, the electrostatic dust collecting module 2 further includes an insulating frame 23. The insulating frame 23 is made of an insulating material, such as plastic. The insulating frame 23 may be configured as a rectangular frame structure. The outer peripheral wall of the insulating frame 23 abuts against the inner peripheral wall of the airflow channel, and the outer peripheral wall of the insulating frame 23 is sealed with the inner peripheral wall of the airflow channel. The first dust collecting electrode 21 and the second dust collecting electrode 22 are both connected to the insulating frame 23, and the insulating frame 23 supports the first dust collecting electrode 21 and the second dust collecting electrode 22.

[0086] The first dust collecting electrode 21 includes a plurality of first conductive strips 211 and a first conductive column 212. The first dust collecting electrode 21 may be made of metal or carbon fiber. The first conductive strip 211 may be configured as a straight strip. The first conductive strip 211 extends from one side of the insulating frame 23 to the other side of the insulating frame 23. The extension directions of the plurality of first conductive strips 211 are parallel to each other. The first conductive column 212 is configured as a strip structure, which may be a straight strip structure. The first conductive column 212 is connected to each first conductive strip 211.

[0087] The second dust collecting electrode 22 includes a plurality of second conductive strips 221 and a second conductive column 222. The second dust collecting electrode 22 may be made of metal or carbon fiber. The second conductive strip 221 may be configured as a straight strip. The second conductive strip 221 extends from one side of the insulating frame 23 to the other side of the insulating frame 23. The extension direction of the plurality of second conductive strips 221 is parallel to the extension direction of the first conductive strip 211. The second conductive column 222 is configured as a strip structure. The second conductive column 222 is connected to each second conductive strip 221.

[0088] The number of the first conductive strips 211 and the second conductive strips 221 may be the same, or the number of the first conductive strips 211 may be one more or one less than the number of the second conductive strips 221 .

[0089] In a direction perpendicular to the extending direction of the first conductive strips 211, the first conductive strips 211 and the second conductive strips 221 are arranged alternately, and there is a gap between adjacent first conductive strips 211 and second conductive strips 221, and the width of the gap is uniform. The gap between the first conductive strips 211 and the second conductive strips 221 allows the airflow in the airflow channel 31 to pass through.

[0090] The control module is electrically connected to one end of the first conductive column 212 and the second conductive column 222 through a wire. The control module can load a voltage difference between the first conductive bar 211 and the second conductive bar 221 so that a strong electric field is generated in the gap between the first conductive bar 211 and the second conductive bar 221. When a constant DC voltage is loaded between the first conductive bar 211 and the second conductive bar 221, the charged particles in the air flowing through the gap can be adsorbed on the first conductive bar 211 or the second conductive bar 221 under the action of the electrostatic field. When an AC voltage is loaded between the first conductive bar 211 and the second conductive bar 221, the particles can be separated from the first conductive bar 211 and the second conductive bar 221 under the action of the electric field and enter the gap and be carried away by the airflow flowing through the gap. At the same time, since the first conductive bar 211 and the second conductive bar 221 are alternately arranged in plurality, a plurality of gaps for airflow to pass through will be formed, thereby reducing the resistance of the electrostatic dust collection module 2 to the airflow and reducing the air volume loss.

[0091] In an exemplary embodiment, the first conductive strip 211 and the second conductive strip 221 are both configured as strip-shaped flat plates. The plate surfaces of the first conductive strip 211 and the second conductive strip 221 are both perpendicular to the direction in which the first conductive strip 211 and the second conductive strip 221 are alternately arranged. The plate surfaces of adjacent first conductive strips 211 and second conductive strips 221 are arranged facing each other.

[0092] In this way, the plate surfaces of the first conductive strip 211 and the second conductive strip 221 are parallel to each other, and the electric field is more evenly distributed in the gap between the first conductive strip 211 and the second conductive strip 221, which can improve the filtering and dust removal effect of the electrostatic dust collection module 2. At the same time, in the self-cleaning mode, dust at various locations of the first conductive strip 211 and the second conductive strip 221 of the electrostatic dust collection module 2 can also be evenly removed.

[0093] In an illustrative embodiment, the first conductive column 212 and the second conductive column 222 may extend along opposite sides of the frame, respectively. The first conductive column 212 is connected to the ends of the plurality of first conductive strips 211 facing the same direction. The second conductive column 222 is connected to the ends of the plurality of second conductive strips 221 facing away from the first conductive column 212. In this way, the first conductive column 212 and the second conductive column 222 have little effect on the electric field between the first conductive strip 211 and the second conductive strip 221.

[0094] In an illustrative embodiment, step S2 further includes: after entering the self-cleaning mode, the control module further controls the charging module 1 to ionize the air. In step S2, the control module controls the fan 4 to reverse so that the fan 4 drives the air in the airflow channel 31 to flow through the electrostatic dust collection module 2 and the charging module 1 in sequence.

[0095] During the self-cleaning process of the air purification device 100, the fan 4 drives the air in the airflow channel 31 to flow through the electrostatic dust collection module 2 and the charging module 1 in sequence. At the same time, the control module ionizes the air to produce active substances such as positive ions, negative ions, and ozone. These active substances diffuse into the air and can disinfect bacteria that have left the electrostatic dust collection module 2. At the same time, the active substances move with the air to the air inlet of the shell, and can disinfect bacteria on the inner surface of the airflow channel 31 and the pipe upstream of the airflow channel 31. The fan 4 can blow the dust on the airflow channel 31 and the electrostatic dust collection module 2 to the outside of the room.

[0096] In an illustrative embodiment, the control method further includes step S1a and step S1b.

[0097] Step S1a: The control module receives the air purification instruction, enters the air purification mode, and enters step S2b;

[0098] In this embodiment, the air purification device 100 has an air purification mode. The user can send an air purification instruction to the air purification device 100 through a remote controller or a mobile terminal to turn on the air purification mode of the air purification device 100. The mobile terminal can be a mobile phone or a tablet computer.

[0099] Step S2b: The control module controls the fan 4 to rotate forward so that the fan 4 drives the air in the airflow channel 31 to flow through the charging module 1 and the electrostatic dust collection module 2 in sequence, the control module controls the charging module 1 to ionize the air so that the particles in the air are charged, and the control module loads a constant DC voltage between the first dust collecting electrode 21 and the second dust collecting electrode 22 of the electrostatic dust collection module 2 so that the electrostatic dust collection module 2 adsorbs the charged particles.

[0100] After entering the air purification mode, the fan 4 rotates forward and drives the air in the airflow channel 31 to flow through the charging module 1 and the electrostatic dust collection module 2 in sequence. When the air flows through the charging module 1, the particles in the air adsorb the charged particles generated by the charging module 1 and become charged. When the air passes through the electrostatic dust collection module 2, the charged particles are adsorbed by the electrostatic dust collection module 2 that generates an electrostatic field and collected together, thereby removing the particles in the air and achieving the effect of purifying the air. At the same time, the charged particles and other active substances generated by the charging module 1 can also play a role in sterilization. In this way, the air input into the room from the air outlet can be effectively purified.

[0101] In an illustrative embodiment, Figure 4 , 8As shown, the charging module 1 includes a first charged electrode 111, a second charged electrode 112 and an insulating bracket 113. The first charged electrode 111 and the second charged electrode 112 are both conductors. The first charged electrode 111 and the second charged electrode 112 can be made of metal or carbon fiber, such as copper, aluminum, iron and alloys thereof. The materials used to make the first charged electrode 111 and the second charged electrode 112 can be the same or different. The shapes of the first charged electrode 111 and the second charged electrode 112 are not limited, and can be cylindrical, annular, strip, sheet, block or plate-shaped. The shapes of the first charged electrode 111 and the second charged electrode 112 can be the same or different.

[0102] The insulating support 113 is a rigid structure made of insulating material. The insulating support 113 is connected to the first charged electrode 111 and the second charged electrode 112. The first charged electrode 111 and the second charged electrode 112 are spaced apart from each other.

[0103] The controller controls the power module to ground the second charged electrode 112 and output a pulse voltage signal to the first charged electrode 111. The pulse voltage signal may be a negative voltage signal. Fig.16 As shown, the waveform of the pulse voltage signal is a rectangular wave, a square wave, a sharp wave, a sawtooth wave, a bell wave, a trapezoidal wave or a triangular wave. When the power module outputs a voltage pulse to the first charged electrode 111, a voltage difference is generated between the first charged electrode 111 and the second charged electrode 112, and then an electric field is generated between the first charged electrode 111 and the second charged electrode 112, and the electric field can ionize the air so that plasma is generated between the first charged electrode 111 and the second charged electrode 112. In this way, each time the power module outputs a voltage pulse to the first charged electrode 111, the first charged electrode 111 will perform a pulse discharge.

[0104] The voltage peak of the pulse voltage signal required by the control module to drive the first charged electrode 111 to intermittently pulse discharge to generate plasma can be lower than the constant voltage required for the first charged electrode 111 to continuously discharge, thereby reducing the load of the power module and extending the life of the power module.

[0105] In some embodiments, the power module includes a second boost circuit and a second rectifier circuit. The second boost circuit is used to boost the input AC voltage and transmit it to the second rectifier circuit. The second rectifier circuit is used to rectify the input high-voltage AC voltage into a high-voltage DC voltage output. The second rectifier circuit can be a half-wave rectifier circuit. The second rectifier circuit includes a third output terminal and a fourth output terminal. The third output terminal is grounded. The fourth output terminal outputs a negative pulse voltage signal. The third output terminal is electrically connected to the second charged electrode 112, and the fourth output terminal is electrically connected to the first charged electrode 111.

[0106] In an exemplary embodiment, the frequency of the pulse voltage signal applied by the control module to the first charged electrode 111 is 8-12 kHz, preferably 10 kHz. The pulse width of the pulse voltage signal is 80-120 μs, preferably 100 μs. The amplitude of the pulse voltage signal is 8-12 kV, preferably 10 kV.

[0107] When the pulse voltage signal adopts the parameters in the above range, the sterilization rate of the charging module 1 on bacteria in the air can reach 99%·h in the self-cleaning mode and the air purification mode. -1 The sterilization rate of the inner surface of the air flow channel 31 can reach 99% in 20 minutes. -1 .

[0108] In an illustrative embodiment, the second charged electrode 112 is configured as a cylinder. The outer peripheral wall of the second charged electrode 112 abuts against the inner peripheral wall of the airflow channel 31 of the housing 3, and there is no gap between the outer peripheral wall of the second charged electrode 112 and the inner peripheral wall of the airflow channel 31, and the air in the airflow channel 31 must flow through the internal channel of the second charged electrode 112.

[0109] The internal channels of the second charged electrodes 112 of the multiple charged modules 1 are connected in sequence. The multiple second charged electrodes 112 can be coaxially arranged, and the ends of two adjacent second charged electrodes 112 are mutually abutted so that the internal channels of the two second charged electrodes 112 are mutually connected. Two adjacent second charged electrodes 112 in the multiple second charged electrodes 112 can also be spaced apart from each other, and the internal channels of the two adjacent second charged electrodes 112 can be mutually connected through the airflow channel 31 between the two second charged electrodes 112.

[0110] The first charged electrode 111 is arranged inside the second charged electrode 112. The first charged electrode 111 is arranged in a straight strip structure. The first charged electrode 111 is arranged coaxially with the second charged electrode 112. One end of the first charged electrode 111 is arranged as a discharge tip 1111, and the discharge tip 1111 can be needle-shaped, pointed tooth-shaped or conical. The discharge tip 1111 faces one end of the second charged electrode 112.

[0111] The insulating support 113 is configured in a strip shape, one end of the insulating support 113 is connected to the side wall of the second charged electrode 112 , and the other end of the insulating support 113 is connected to the middle of the second charged electrode 112 or an end of the second charged electrode 112 facing away from the discharge tip 1111 .

[0112] In this way, when a voltage difference is applied between the first charged electrode 111 and the second charged electrode 112, since the curvature radius of the discharge tip 1111 is very small, the discharge tip 1111 of the first charged electrode 111 will discharge uniformly to the second charged electrode 112, so that the discharge area can cover the gap between the discharge tip 1111 and the second charged electrode 112. Since the air in the airflow channel 31 must flow through the internal channel of the second charged electrode 112, that is, it must pass through the discharge area, the particulate matter in the air has a very high probability of adsorbing charged particles and being charged when passing through the discharge area, thereby improving the dust removal effect. At the same time, the first charged electrode 111 is constructed in a straight strip shape and is coaxial with the second charged electrode 112, which can reduce the resistance to the air and improve the air flow rate.

[0113] In an exemplary embodiment, one end of the second charged electrode 112 is for air intake, and the other end is for air discharge. The discharge tip 1111 of the first charged electrode 111 faces the end of the second charged electrode 112 for air intake.

[0114] Since the discharge tip 1111 faces the air intake end of the second charged electrode 112 , the discharge tip 1111 of the second charged electrode 112 faces the wind, and the second charged electrode 112 has less resistance to the air, further increasing the air flow rate.

[0115] In an illustrative embodiment, Fig. 9 As shown, both ends of the second charged electrode 112 are configured as discharge tips 1111. Both ends of the first charged electrode 111 face toward an end where the second charged electrode 112 inlets air and an end where the second charged electrode 112 outlets air, respectively.

[0116] When only one discharge tip 1111 of the first charged electrode 111 discharges, ion wind will be generated. The ion wind will increase the resistance in the second charged electrode 112 and reduce the static pressure. The ion wind will also hinder the airflow in the second charged electrode 112, resulting in a reduction in air volume. In order to prevent air intake loss, another discharge tip 1111 is added. The discharge tips 1111 at both ends of the first charged electrode 111 can discharge. Since the two discharge tips 1111 are facing the windward direction and the leeward direction respectively, the ion wind generated by the simultaneous discharge of the two discharge tips 1111 on the airflow can offset each other, thereby not affecting the air volume. In addition, the discharge of the two discharge tips 1111 can also increase the probability of particle charging and improve the air purification effect.

[0117] In another exemplary embodiment, Fig.10 , 11As shown, the second charged electrode 112 is cylindrical. The outer peripheral wall of the second charged electrode 112 abuts against the inner peripheral wall of the air flow channel 31 of the housing 3, and there is no gap between the outer peripheral wall of the second charged electrode 112 and the inner peripheral wall of the air flow channel 31, and the air in the air flow channel 31 must flow through the internal channel of the second charged electrode 112.

[0118] The charging module 1 is provided with a plurality of first charging electrodes 111. The plurality of first charging electrodes 111 are all arranged inside the second charging electrode 112. The first charging electrode 111 is provided with a discharge tip 1111, which may be needle-shaped, pointed-tooth-shaped or conical.

[0119] The control module applies voltage pulses to the plurality of first charged electrodes 111 in turn so that the discharge tips 1111 of the plurality of first charged electrodes 111 discharge in turn.

[0120] In this way, the discharge tips 1111 of the plurality of first charging electrodes 111 perform pulse discharge in turn, so that the charging module 1 can discharge continuously and generate more charged particles, thereby improving the dust removal and sterilization efficiency.

[0121] In an illustrative embodiment, Fig.10 , 11 As shown, the first charged electrode 111 is arranged in a strip structure, which may be a straight strip structure. One end of the first charged electrode 111 is arranged as a discharge tip 1111. The ends of the multiple first charged electrodes 111 facing away from the discharge tip 1111 are close to each other. In this embodiment, the charging module 1 further includes an insulating bracket 113. The insulating bracket 113 is configured as a straight strip. One end of the insulating bracket 113 is connected to the second charged electrode 112, and the other end of the insulating bracket 113 is connected to the end of each first charged electrode 111 facing away from the discharge tip 1111. The discharge tips 1111 of the multiple first charged electrodes 111 face different directions. Six first charged electrodes 111 may be provided, and the discharge tips 1111 of the two first charged electrodes 111 face the end of the second charged electrode 112 that enters the air and the end of the second charged electrode 112 that exits the air, respectively, and the discharge tips 1111 of the remaining four first charged electrodes 111 face the radially outward direction of the second charged electrode 112 and face four different orientations.

[0122] In this way, the discharge tips 1111 of the multiple first charged electrodes 111 can output ion winds in different directions when performing pulse discharge in turn, which can increase the probability of charging the particles and thereby improve the effect of sterilization and dust removal.

[0123] In some embodiments, Fig.11 As shown, the plurality of first charged electrodes 111 may be centrally arranged at the center of the second charged electrode 112. Fig.12As shown, the plurality of first charged electrodes 111 may also be arranged in the middle of one end of the second charged electrode 112. Fig.13 As shown, a non-through notch 1120 may be provided on the second charged electrode 112. Fig.14 As shown, the second charged electrode 112 may be provided with a notch 1121 that penetrates the second charged electrode 112 along the axial direction.

[0124] The present application describes multiple embodiments, but the description is exemplary rather than restrictive, and it is obvious to those skilled in the art that there may be more embodiments and implementations within the scope of the embodiments described in the present application. Although many possible feature combinations are shown in the drawings and discussed in the specific embodiments, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with any other feature or element in any other embodiment, or may replace any other feature or element in any other embodiment.

[0125] The present application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features and elements disclosed in the present application may also be combined with any conventional features or elements to form a unique invention scheme defined by the claims. Any features or elements of any embodiment may also be combined with features or elements from other invention schemes to form another unique invention scheme defined by the claims. Therefore, it should be understood that any feature shown and / or discussed in the present application may be implemented individually or in any appropriate combination. Therefore, except for the limitations made according to the attached claims and their equivalents, the embodiments are not subject to other restrictions. In addition, various modifications and changes may be made within the scope of protection of the attached claims.

[0126] In addition, when describing representative embodiments, the specification may have presented the method and / or process as a specific sequence of steps. However, to the extent that the method or process does not rely on the specific order of the steps described herein, the method or process should not be limited to the steps of the specific order described. As will be understood by those of ordinary skill in the art, other sequences of steps are also possible. Therefore, the specific sequence of the steps set forth in the specification should not be interpreted as a limitation to the claims. In addition, the claims for the method and / or process should not be limited to the steps of performing them in the order written, and those skilled in the art can easily understand that these sequences can be changed and still remain within the spirit and scope of the embodiments of the present application.

Claims

1. An air purification device, It is characterized in that include: The housing is provided with an air flow channel; A fan, configured to drive the air in the air flow channel to flow along the air flow channel; An electrostatic dust collecting module is arranged in the airflow channel, comprising a first dust collecting electrode and a second dust collecting electrode spaced apart from the first dust collecting electrode; as well as The control module is electrically connected to the electrostatic dust collection module and the fan, and is configured to load an alternating voltage between the first dust collection electrode and the second dust collection electrode to ionize the particles adsorbed on the electrostatic dust collection module and separate the particles from the electrostatic dust collection module based on entering a self-cleaning mode, and control the fan to drive the air in the airflow channel to flow along the airflow channel.

2. The air purification device according to claim 1, It is characterized in that The control module alternately loads voltage pulses of the same electrical property on the first dust collecting electrode and the second dust collecting electrode, and when one of the first dust collecting electrode and the second dust collecting electrode is loaded with a voltage pulse, the other of the first dust collecting electrode and the second dust collecting electrode is grounded to achieve loading of an alternating voltage between the first dust collecting electrode and the second dust collecting electrode.

3. The air purification device according to claim 2, It is characterized in that The frequency of the voltage pulses applied by the control module to the first dust collecting electrode and the second dust collecting electrode is 200-300 Hz; The amplitude of the voltage pulse is 8 to 12 kV; The pulse width of the voltage pulse is 0.1-0.2 ms.

4. The air purification device according to claim 2, It is characterized in that The waveform of the voltage pulse is a rectangular wave; and / or, The voltage pulse is a negative voltage pulse.

5. The air purification device according to claim 1, It is characterized in that The first dust collecting electrode comprises a plurality of first conductive strips parallel to each other; The second dust collecting electrode comprises a plurality of second conductive strips which are all parallel to the first conductive strips; The first conductive strips and the second conductive strips are alternately arranged in a direction perpendicular to the first conductive strips, and there is a gap between adjacent first conductive strips and second conductive strips for air flow to pass through.

6. The air purification device according to any one of claims 1 to 5, It is characterized in that The air purification device also includes a charging module disposed in the air flow channel; The control module is electrically connected to the charging module, and the control module is further configured to control the charging module to ionize air based on entering the self-cleaning mode; In the self-cleaning mode, the fan drives the air in the airflow channel to flow through the electrostatic dust collection module and the charging module in sequence.

7. The air purification device according to claim 6, It is characterized in that The control module is also configured to control the fan to drive the air in the airflow channel to flow through the charging module and the electrostatic dust collection module in sequence based on entering the purified air mode, control the charging module to ionize the air so that the particles in the air are charged, and load a constant DC voltage between the first dust collecting electrode and the second dust collecting electrode to adsorb the charged particles.

8. The air purification device according to claim 6, It is characterized in that The charging module includes a first charging electrode and a second charging electrode spaced apart from the first charging electrode; Wherein, the second charged electrode is grounded, and the control module outputs a pulse voltage signal to the first charged electrode, so that plasma is generated between the first charged electrode and the second charged electrode.

9. The air purification device according to claim 8, It is characterized in that The frequency of the pulse voltage signal is 8 to 12 kHz; The pulse width of the pulse voltage signal is 80 to 120 μs; The amplitude of the pulse voltage signal is 8-12 kV.

10. The air purification device according to claim 8, It is characterized in that The waveform of the pulse voltage signal is a rectangular wave, a sharp wave, a sawtooth wave, a bell wave, a trapezoidal wave or a triangular wave.

11. The air purification device according to claim 8, It is characterized in that The second charged electrode is cylindrical in shape, and the outer peripheral wall of the second charged electrode abuts against the inner peripheral wall of the airflow channel; The first charged electrode is disposed inside the second charged electrode and is configured as a straight bar coaxial with the second charged electrode. One end of the first charged electrode is configured as a discharge tip.

12. The air purification device according to claim 11, It is characterized in that The discharge tip faces one end of the second charged electrode into which the air enters.

13. The air purification device according to claim 8, It is characterized in that The second charged electrode is cylindrical in shape, and the outer peripheral wall of the second charged electrode abuts against the inner peripheral wall of the airflow channel; There are a plurality of first charged electrodes, each of which is disposed inside the second charged electrode, and each of which is provided with a discharge tip; The control module applies voltage pulses to the plurality of first charged electrodes in turn so that the discharge tips of the plurality of first charged electrodes discharge in turn.

14. The air purification device according to claim 13, It is characterized in that The first charged electrode is configured as a strip, and the discharge tip is disposed at one end of the first charged electrode; Ends of the plurality of first charged electrodes facing away from the discharge tip are close to each other, and the discharge tips of the plurality of first charged electrodes face different directions.

15. A control method for an air purification device, It is characterized in that The control method is implemented based on the air purification device according to any one of claims 1 to 14, and the control method includes: Based on entering the self-cleaning mode, an alternating voltage is loaded between the first dust collecting electrode and the second dust collecting electrode to ionize the particles adsorbed on the electrostatic dust collecting module and separate the particles from the electrostatic dust collecting module, and the fan is controlled to drive the air in the airflow channel to flow along the airflow channel.

16. An air treatment device, It is characterized in that The invention comprises an air purification device as claimed in any one of claims 1 to 14.

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