Air treatment equipment, air purification device and control method

Abstract

The invention discloses air treatment equipment, an air purification device and a control method. The air purification device comprises a shell, wherein an air flow channel is formed in the shell; the charging module is configured to ionize air so as to enable particulate matters in the air to be charged; the electrostatic dust collection module is arranged in the air flow channel, is positioned at the downstream of the charging module and is configured to apply an electrostatic field to adsorb charged particles; and the fan is used for driving air in the air flow channel to sequentially flow through the charge module and the electrostatic dust collection module. Particle pollutants adsorbed on the electrostatic dust collection module can be washed by water, and the washed electrostatic dust collection module can be reused. Meanwhile, the air purification device has small resistance to air and is suitable for scenes with large air volume and high dust concentration.

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] At present, the fresh air filtration technology mainly adopts HEPA (High efficiency particulate air Filter) filtration technology and glass fiber filters, among which HEPA filters are generally used for civilian use, and glass fiber filters are generally used in industrial dust-free workshops.

[0004] However, HEPA fresh air filtration technology has the following shortcomings:

[0005] 1) Replace consumables: After long-term use, the HEPA filter will be clogged due to dust accumulation on the surface. If it is not replaced for a long time, bacteria will grow on the surface of the material, and the air blown out will also produce odor. HEPA filters cannot be washed and regenerated, so HEPA filters need to be replaced regularly. Due to the limited space of the air conditioner's hanging unit (indoor unit), the size of the fresh air filter HEPA net is often relatively small and the dust holding capacity is low, so the replacement cycle of the hanging unit's fresh air HEPA is shorter.

[0006] 2) High resistance and low air volume: Since the HEPA net is made of melt-blown fibers, the fiber gap is small and the air resistance is high. Therefore, when using the HEPA net for filtration, the air resistance increases sharply and the fresh air volume decreases sharply, seriously affecting the user experience. Summary of the invention

[0007] The present application proposes an air purification device, which comprises:

[0008] A shell body having an air flow channel therein;

[0009] a charging module configured to ionize the air so that particles in the air are charged; and

[0010] an electrostatic dust collection module, disposed in the airflow channel and downstream of the charging module, configured to apply an electrostatic field to adsorb charged particles;

[0011] A fan, used for driving the air in the air flow channel to flow through the charging module and the electrostatic dust collection module in sequence;

[0012] a power module, electrically connected to the charging module and the electrostatic dust collection module, and configured to supply power to the charging module and the electrostatic dust collection module;

[0013] a first dust sensor, used to measure the dust concentration of the air input into the air flow channel before purification;

[0014] The control module is electrically connected to the power module and the first dust sensor, and is configured to adjust the input voltage of the charging module according to the current dust concentration before purification, and the absolute value of the input voltage of the charging module tends to increase with the increase of the dust concentration before purification.

[0015] In an illustrative embodiment, adjusting the input voltage of the charging module according to the current dust concentration before purification includes:

[0016] Determine the value interval to which the current dust concentration before purification belongs, and adjust the input voltage of the charging module to a charging input voltage corresponding to the value interval;

[0017] Among them, the value range of the dust concentration before purification is divided into multiple non-overlapping value intervals, and the multiple value intervals correspond to multiple charging input voltages one by one. The larger the value of the value interval, the larger the absolute value of the charging input voltage corresponding to it.

[0018] In an illustrative embodiment, the absolute value of the input voltage of the charging module is positively correlated with the dust concentration before purification.

[0019] In an illustrative embodiment, the input voltage of the charging module is determined according to the following formula:

[0020]

[0021] Wherein, Vh is the input voltage of the charging module, in kV;

[0022] P 1 is the current dust concentration before purification;

[0023] p is the voltage coefficient, P 1 Same units as p.

[0024] In an illustrative embodiment, the control module is further configured to adjust the input voltage of the electrostatic dust collection module according to the current dust concentration before purification, and the absolute value of the input voltage of the electrostatic dust collection module tends to increase with the increase of the dust concentration before purification.

[0025] In an illustrative embodiment, adjusting the input voltage of the electrostatic dust collection module according to the current dust concentration before purification includes:

[0026] Determine the value interval to which the current dust concentration before purification belongs, and adjust the input voltage of the electrostatic dust collection module to the dust collection input voltage corresponding to the value interval;

[0027] Among them, the value range of the dust concentration before purification is divided into multiple non-overlapping value intervals, and the multiple value intervals correspond to multiple dust collection input voltages one by one. The larger the value of the value interval, the larger the absolute value of the dust collection input voltage corresponding to it.

[0028] In an illustrative embodiment, the absolute value of the input voltage of the electrostatic dust collection module is positively correlated with the dust concentration before purification.

[0029] In an illustrative embodiment, the input voltage of the electrostatic dust collection module is determined according to the following formula:

[0030]

[0031] Wherein, Vh is the input voltage of the electrostatic dust collection module, in kV;

[0032] P 1 is the current dust concentration before purification;

[0033] p is the voltage coefficient, P 1 Same units as p.

[0034] In an illustrative embodiment, it further includes a second dust sensor electrically connected to the control module, wherein the second dust sensor is electrically connected to the control module and is used to measure the dust concentration of the air after purification after passing through the electrostatic dust collection module;

[0035] The control module is also configured to calculate a primary filtration efficiency based on the current dust concentration before purification and the current dust concentration after purification, and increase the input voltage of the charging module and the electrostatic dust collection module based on the fact that the primary filtration efficiency is less than the first preset filtration efficiency and the dust concentration after purification is greater than the preset dust concentration.

[0036] In an illustrative embodiment, the control module is also configured to no longer increase the input voltage of the charging module and the electrostatic dust collection module based on the primary filtration efficiency being greater than or equal to the first preset filtration efficiency or the dust concentration after purification being less than or equal to the preset dust concentration.

[0037] In an illustrative embodiment, the input voltage boost amplitude of the charging module and the electrostatic dust collection module ranges from -1.5 kV to -2.5 kV.

[0038] In an illustrative embodiment, the charging module includes a first electrode, a second electrode spaced apart from the first electrode, and an insulating bracket connecting the first electrode and the second electrode;

[0039] The power module applies a voltage difference between the first electrode and the second electrode to generate plasma.

[0040] In an exemplary embodiment, the second electrode is cylindrical, and the outer peripheral wall of the second electrode abuts against the inner peripheral wall of the air flow channel;

[0041] The first electrode is disposed inside the second electrode and is configured as a straight bar coaxial with the second electrode, and one end of the first electrode is configured as a discharge tip.

[0042] In an illustrative embodiment, the discharge tip faces an end of the second electrode that enters the wind.

[0043] This embodiment also provides a control method for an air purification device, which includes:

[0044] Obtaining the dust concentration of the air input into the airflow channel before purification;

[0045] The input voltage of the charging module is adjusted according to the current dust concentration before purification, wherein the absolute value of the input voltage of the charging module tends to increase with the increase of the dust concentration before purification.

[0046] This embodiment also provides an air treatment device, which includes the air purification device as described above.

[0047] In the technical solution of the present application, after the fan is running, it drives the air in the air flow channel to flow through the charging module and the electrostatic dust collection module in sequence. When the air flows through the charging module, the particulate matter in the air adsorbs the charged particles generated by the charging module and becomes charged. When passing through the electrostatic dust collection module, the charged particulate matter is adsorbed by the electrostatic dust collection module and collected together, thereby removing the particulate matter in the air and achieving the effect of purifying the air. At the same time, the charged particles generated by the charging module can also play a role in sterilization. The adsorbed particulate pollutants on the electrostatic dust collection module can be washed with water, and the electrostatic dust collection module can be reused after washing. At the same time, this air purification device has low resistance to air and is suitable for scenes with large air volume and high dust concentration.

[0048] The control module adjusts the input voltage of the charging module according to the current dust concentration before purification. The greater the dust concentration before purification of the air to be purified, the more particulate matter there is in the air to be purified. The control module increases the input voltage of the charging module, and the charging module can generate more charged particles so that more particulate matter can be effectively charged, thereby ensuring the air purification effect. The smaller the dust concentration before purification of the air to be purified, the fewer particulate matter there is in the air to be purified. The control module adjusts the input voltage of the charging module to a lower level. After the input voltage becomes lower, the rate of charged particles generated by the charging module becomes lower, which can also meet the demand of charging fewer particulate matter, and can ensure the air purification effect. At the same time, it can also extend the service life of the charging module and the power module and reduce the ozone concentration.

[0049] 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

[0050] 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.

[0051] Figure 1 A schematic front view of an air purification device according to an embodiment of the present application;

[0052] Figure 2 A three-dimensional schematic diagram of an air purification device according to an embodiment of the present application;

[0053] Figure 3 A full cross-sectional schematic diagram of an air purification device according to an embodiment of the present application;

[0054] Figure 4 A simplified schematic diagram of an air purification device according to an embodiment of the present application;

[0055] Figure 5 This is a flow chart of a control method for an air purification device according to an embodiment of the present application;

[0056] Figure 6 A schematic diagram of a charging module according to an embodiment of the present application;

[0057] Figure 7 A schematic diagram of another charging module according to an embodiment of the present application;

[0058] Figure 8 FIG. 4 is a schematic diagram of another charging module according to an embodiment of the present application.

[0059] Reference numerals:

[0060] 100. Air purification device; 1. Charging module; 111. First electrode; 1111. Discharge tip; 112. Second electrode; 113. Insulating bracket; 1131. Sub-bracket; 2. Electrostatic dust collection module; 3. Shell; 31. Air flow channel; 32. Air inlet; 33. Air outlet; 4. Fan; 5. First dust sensor; 6. Second dust sensor. DETAILED DESCRIPTION

[0061] 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.

[0062] 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.

[0063] 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 power module, a first dust sensor 5, a fan 4 and a control module.

[0064] The shell 3 can be made of insulating material, such as plastic. The shell 3 is provided with an air flow 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 air flow channel 31. The air inlet 32 ​​is used to input the air to be purified into the air flow channel 31. The air inlet 32 ​​can be connected to the outdoors. The air is input from the air inlet 32, and is output from the air outlet 33 after flowing through the air flow 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.

[0065] like Figure 4As 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.

[0066] 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.

[0067] 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 a gap or mesh 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 an anode and a cathode. A gap is provided between the anode and the cathode, and air passes through the gap. The anode is electrically connected to the positive electrode of the power module, and the cathode is electrically connected to the negative electrode of the power module. An electrostatic field is generated between the anode and the cathode, and when the charged particles pass through the gap between the anode and the cathode, the positively charged particles move toward the cathode under the action of the electrostatic field and are adsorbed on the cathode, and the negatively charged particles move toward the anode under the action of the electrostatic field and are adsorbed on the anode. The electrostatic dust collecting module 2 can be an electrostatic dust collecting net.

[0068] The fan 4 can drive the air in the airflow channel 31 to flow through the charging module 1 and the electrostatic dust collection module 2 in sequence. The fan 4 can be arranged in the airflow channel 31 of the housing 3. The fan 4 can 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. In this embodiment, the fan 4 is arranged in the airflow channel 31 and is located downstream of the electrostatic dust collection module 2. When the fan 4 is running, the air inlet 32 ​​generates negative pressure and inhales the air to be purified. The air to be purified is purified after flowing 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 accumulation on the fan 4.

[0069] After the fan 4 is running, it 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 passing through the electrostatic dust collection module 2, the charged particles are adsorbed by the electrostatic dust collection module 2 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 generated by the charging module 1 can also play a role in sterilization. The adsorbed particle pollutants on the electrostatic dust collection module 2 can be washed with water, and the electrostatic dust collection module 2 can be reused after washing.

[0070] The power module is electrically connected to the electrostatic dust collection module 2 and the charging module 1. The power module can provide high voltage electricity to the electrostatic dust collection module 2 and the charging module 1, and the voltage value of the high voltage electricity is adjustable. The power module can be a high voltage package. In some embodiments, a boost circuit and a rectifier circuit can be provided in the power module, and the boost circuit is used to increase the input voltage to high voltage alternating current, and the rectifier circuit can convert the high voltage alternating current output by the boost circuit into high voltage direct current, and the high voltage direct current is transmitted to the electrostatic integration module and the charging module 1 to drive the electrostatic integration module and the charging module 1 to operate. The boost circuit is configured to have an adjustable voltage amplification factor, or the input voltage of the boost circuit is adjustable, so that the voltage output by the power module to the charging module 1 and the electrostatic dust collection module 2 is adjustable, that is, the input voltage of the charging module 1 and the electrostatic dust collection module 2 is adjustable.

[0071] The first dust sensor 5 is arranged on the housing 3, and can be arranged at the air inlet 32, or can be arranged in the air flow channel 31 and located upstream of the charging module 1. The first dust sensor 5 is electrically connected to the control module. The first dust sensor 5 is used to measure the dust concentration of the air input into the air flow channel 31 before purification, that is, to measure the dust concentration of the air to be purified. The dust concentration before purification measured by the first dust sensor 5 can be a PM2.5 concentration. PM2.5 is fine particulate matter, which refers to particulate matter in the ambient air with an aerodynamic equivalent diameter less than or equal to 2.5 microns.

[0072] The control module is a logic control unit of the air purification device. The control module can be a single chip microcomputer. The control module is electrically connected to the first dust sensor 5 and the power module. The control module can control the input voltage of the electrostatic integration module 2 and the charging module 1 by controlling the output voltage of the power module.

[0073] This embodiment also proposes a control method for an air purification device, which is implemented based on the above-mentioned air purification device. The control method includes:

[0074] Step S1: receiving a start instruction, the control module obtains the current dust concentration of the air input into the airflow channel 31 before purification, controls the fan 4 to operate, and enters step S2;

[0075] The user can send a start command to the air purification device through a remote control or a mobile terminal to start the purification function of the air purification device. The mobile terminal can be a mobile phone or a tablet computer. The control module measures the current pre-purification dust concentration of the air input into the air flow channel 31 through the first dust sensor 5.

[0076] Step S2: the control module adjusts the input voltage of the charging module 1 according to the current dust concentration before purification of the air in the input airflow channel 31, wherein the absolute value of the input voltage of the charging module 1 tends to increase with the increase of the dust concentration before purification.

[0077] The greater the input voltage of the charging module 1, the higher the discharge intensity of the charging module 1, the faster the rate of charged particles generated, and the better the charging effect on particulate matter. However, the higher the input voltage of the charging module 1, the higher the concentration of ozone generated, and the shorter the service life of the charging module 1 and the power module.

[0078] In this embodiment, the control module adjusts the input voltage of the charging module 1 according to the current dust concentration before purification. The greater the dust concentration before purification of the air to be purified, the more particulate matter there is in the air to be purified. The control module increases the input voltage of the charging module 1. The charging module 1 can generate more charged particles so that more particulate matter can be effectively charged, thereby ensuring the air purification effect. The smaller the dust concentration before purification of the air to be purified, the fewer particulate matter there is in the air to be purified. The control module adjusts the input voltage of the charging module 1 to a lower level. After the input voltage becomes lower, the rate of charged particles generated by the charging module 1 becomes lower, which can also meet the demand of charging fewer particulate matter, and can ensure the air purification effect. At the same time, it can also extend the service life of the charging module 1 and the power module and reduce the ozone concentration.

[0079] In an illustrative embodiment, step S2 also includes: the control module adjusts the input voltage of the electrostatic dust collection module 2 according to the current dust concentration before purification of the air in the input airflow channel 31, wherein the absolute value of the input voltage of the electrostatic dust collection module 2 tends to increase with the increase of the dust concentration before purification.

[0080] The greater the input voltage of the electrostatic dust collection module 2, the stronger the electrostatic field, the stronger the adsorption capacity of the electrostatic dust collection module 2 for charged particles, and the higher the dust removal capacity. However, the higher the input voltage of the electrostatic dust collection module 2, the shorter the service life of the power module and the higher the energy consumption.

[0081] In this embodiment, the control module adjusts the input voltage of the electrostatic dust collection module 2 according to the current dust concentration before purification. The greater the dust concentration before purification of the air to be purified, the more particulate matter there is in the air to be purified. The control module adjusts the input voltage of the electrostatic dust collection module 2 higher. The higher the ability of the electrostatic dust collection module 2 to adsorb charged particulate matter, the more charged particulate matter can be effectively adsorbed on the electrostatic dust collection module 2, thereby ensuring the air purification effect. The smaller the dust concentration before purification of the air to be purified, the fewer particulate matter there is in the air to be purified. The control module adjusts the input voltage of the electrostatic dust collection module 2 lower. After the input voltage becomes lower, the adsorption capacity of the electrostatic dust collection module 2 can also meet the requirement of adsorbing less charged particulate matter, which can ensure the air purification effect and extend the service life of the power module.

[0082] In an illustrative embodiment, step S2 includes step S21 and step S22.

[0083] Step S21: The control module determines the value interval to which the current dust concentration before purification of the air input into the airflow channel 31 belongs, and then proceeds to step S22.

[0084] The value range of dust concentration before air purification is divided into multiple value intervals, and the multiple value intervals do not overlap. Each value interval corresponds to a dust pollution degree. The larger the value of the element in the value interval, the higher the dust pollution degree.

[0085] In this embodiment, the value range of the dust concentration of the air input into the airflow channel 31 before purification is divided into 6 value intervals. The first value interval is 0-12 μg / m 3 The second value range is 13-35μg / m 3 The third value range is 36-55μg / m 3 The fourth value interval is 56-150 μg / m 3 The fifth value interval is 151-250 μg / m 3 The sixth value interval is greater than or equal to 251 μg / m 3 .

[0086] The control module may match the current pre-purification dust concentration of the air input into the airflow channel 31 with each value interval, and may determine the value interval to which the current pre-purification dust concentration belongs.

[0087] Step S22: the control module adjusts the input voltage of the charging module 1 to a charging input voltage corresponding to the value range.

[0088] The multiple value intervals correspond to the multiple charging input voltages one by one, and the charging input voltage corresponding to the larger value interval has a larger absolute value. The charging input voltage is the working voltage of the charging module 1 .

[0089] Under experimental conditions, when purifying air in any dust concentration value range before purification, the minimum voltage required to be loaded to the charging module 1 when the primary filtration efficiency of the air purification device reaches a certain preset filtration efficiency can be pre-calibrated, and this minimum voltage can be used as the charging input voltage corresponding to the value range.

[0090] In this embodiment, the charging input voltage of the charging module 1 corresponding to the first value interval is -2.5kV, the charging input voltage of the charging module 1 corresponding to the second value interval is -3.5kV, the charging input voltage of the charging module 1 corresponding to the third value interval is -6.5kV, the charging input voltage of the charging module 1 corresponding to the fourth value interval is -8.5kV, the charging input voltage of the charging module 1 corresponding to the fifth value interval is -9.5kV, and the charging input voltage of the charging module 1 corresponding to the sixth value interval is -10.5kV.

[0091] After determining the value range to which the current dust concentration before purification of the air in the input airflow channel 31 belongs, the control module can obtain the charging input voltage corresponding to the value range to which the current dust concentration before purification belongs according to the correspondence between the value range and the charging input voltage, and then control the power supply module to adjust the input voltage of the charging module 1 to the charging input voltage.

[0092] In this way, the dust concentration of the air before purification is divided into multiple value intervals. The larger the value of the value interval to which the current dust concentration before purification belongs, the higher the input voltage of the charging module 1 will be adjusted by the control module; the smaller the value of the value interval to which the current dust concentration before purification belongs, the lower the input voltage of the charging module 1 will be adjusted by the control module.

[0093] In an illustrative embodiment, step S2 further includes step S23 after step S22.

[0094] Step S23: the control module adjusts the input voltage of the electrostatic dust collection module 2 to a dust collection input voltage corresponding to the value range.

[0095] The multiple value intervals correspond to the multiple dust collection input voltages one by one, and the dust collection input voltage corresponding to the value interval with a larger value is larger in absolute value. The dust collection input voltage is the working voltage of the electrostatic dust collection module 2.

[0096] Under experimental conditions, when purifying the air in any dust concentration value range before purification, the minimum voltage required to be loaded onto the electrostatic dust collection module 2 when the primary filtration efficiency of the air purification device reaches a certain preset filtration efficiency can be pre-calibrated, and this minimum voltage can be used as the dust collection input voltage corresponding to the value range.

[0097] In this embodiment, the dust collection input voltage of the electrostatic dust collection module 2 corresponding to the first value interval is -2.5kV, the dust collection input voltage of the electrostatic dust collection module 2 corresponding to the second value interval is -5.5kV, the dust collection input voltage of the electrostatic dust collection module 2 corresponding to the third value interval is -6.5kV~-8.5kV, the dust collection input voltage of the electrostatic dust collection module 2 corresponding to the fourth value interval is -8.5kV~-10.5kV, the dust collection input voltage of the electrostatic dust collection module 2 corresponding to the fifth value interval is -10.5kV~-12.5kV, and the dust collection input voltage of the electrostatic dust collection module 2 corresponding to the sixth value interval is -12.5~-15.5kV.

[0098] After determining the value range to which the current dust concentration before purification of the air in the input airflow channel 31 belongs, the control module can obtain the dust collection input voltage corresponding to the value range to which the current dust concentration before purification belongs according to the correspondence between the value range and the dust collection input voltage, and then control the power supply module to adjust the input voltage of the electrostatic dust collection module 2 to the dust collection input voltage.

[0099] In this way, the dust concentration of the air before purification is divided into multiple value intervals. The larger the value of the value interval to which the current dust concentration before purification belongs, the higher the control module will adjust the input voltage of the electrostatic dust collection module 2; the smaller the value of the value interval to which the current dust concentration before purification belongs, the lower the control module will adjust the input voltage of the electrostatic dust collection module 2.

[0100] In another exemplary embodiment, in step S2 , the absolute value of the input voltage of the charging module 1 is positively correlated with the dust concentration of the air before purification.

[0101] A relationship curve between the dust concentration before purification and the input voltage of the charging module 1 can be pre-fitted, in which the dust concentration before purification is positively correlated with the absolute value of the input voltage of the charging module 1. The control module can obtain the input voltage of the charging module 1 corresponding to the current dust concentration before purification based on the relationship curve and the current dust concentration before purification, and then control the power supply module to adjust the input voltage of the charging module 1 to the input voltage.

[0102] Therefore, according to different dust concentrations before purification, the input voltage of the charging module 1 can be adjusted to different corresponding input voltage values, and the voltage adjustment method is more sophisticated.

[0103] In some embodiments, in step S2, the input voltage of the charging module 1 is determined according to the following formula:

[0104]

[0105] Wherein, Vh is the input voltage of the charging module 1, in kV;

[0106] P 1 The current dust concentration before purification, in μg / m 3 ;

[0107] p is the voltage coefficient, in μg / m 3 .

[0108] The voltage coefficient p is a constant and can be 10 to 20 μg / m 3 .

[0109] In another exemplary embodiment, in step S2, the absolute value of the input voltage of the electrostatic dust collection module 2 is positively correlated with the dust concentration of the air before purification.

[0110] A relationship curve between the dust concentration before purification and the input voltage of the electrostatic dust collection module 2 can be pre-fitted, in which the dust concentration before purification is positively correlated with the absolute value of the input voltage of the electrostatic dust collection module 2. The control module can obtain the input voltage of the electrostatic dust collection module 2 corresponding to the current dust concentration before purification based on the relationship curve and the current dust concentration before purification, and then control the power supply module to adjust the input voltage of the electrostatic dust collection module 2 to the input voltage.

[0111] Therefore, according to different dust concentrations before purification, the input voltage of the electrostatic dust collection module 2 can be adjusted to different corresponding input voltage values, and the voltage adjustment method is more sophisticated.

[0112] The input voltage of the electrostatic dust collection module 2 is determined according to the following formula:

[0113]

[0114] Wherein, Vh is the input voltage of the electrostatic dust collection module 2, in kV;

[0115] P 1 The current dust concentration before purification, in μg / m 3 ;

[0116] p is the voltage coefficient, in μg / m 3 .

[0117] The voltage coefficient p is a constant and can be 10 to 20 μg / m 3 .

[0118] In an illustrative embodiment, the air purification device further includes a second dust sensor 6. The second dust sensor 6 is disposed on the housing 3, and may be disposed at the air outlet 33, or may be disposed in the air flow channel 31 and located downstream of the electrostatic dust collection module 2. The second dust sensor 6 is electrically connected to the control module. The second dust sensor 6 is used to measure the dust concentration of the air after it flows through the electrostatic dust collection module 2 after purification, that is, to measure the dust concentration of the air after purification.

[0119] The air purification device further includes steps S3 to S7 after step S2.

[0120] Step S3: The control module obtains the current dust concentration before purification and the current dust concentration after purification, and proceeds to step S4;

[0121] The control module measures the current dust concentration before purification of the air input into the airflow channel 31 through the first dust sensor 5. The control module measures the current dust concentration after purification of the air after passing through the electrostatic dust collection module 2 through the second dust sensor 6.

[0122] Step S4: The control module calculates the filtration efficiency based on the current dust concentration before purification and the current dust concentration after purification, and then proceeds to step S5;

[0123] The primary filtration efficiency can be calculated using the following formula:

[0124]

[0125] Among them, Q is the primary filtration efficiency; P1 is the dust concentration before purification, in μg / m 3 ; P2 is the current dust concentration after purification, in μg / m 3 .

[0126] Step S5: The control module determines whether the primary filtration efficiency is less than the first preset filtration efficiency and whether the dust concentration after purification is greater than the preset dust concentration. If so, the process proceeds to step S6; otherwise, the process proceeds to step S7;

[0127] The first preset filtration efficiency can be set according to a filtration efficiency to be achieved by a specific air purification device. The first preset filtration efficiency can be 95%.

[0128] The preset dust concentration may be the maximum dust concentration allowed in the air after being purified by the air purification device. The preset dust concentration may be 35 μg / m 3 .

[0129] The primary filtration efficiency is less than the first preset filtration efficiency and the dust concentration after purification is greater than the preset dust concentration, indicating that the purification effect of the air purification device is not good.

[0130] Step S6: The control module increases the input voltage of the charging module 1 and the electrostatic dust collection module 2, and enters step S3;

[0131] When the primary filtration efficiency of the air purification device is less than the first preset filtration efficiency and the dust concentration after purification is greater than the preset dust concentration, the control module increases the input voltage of the charging module 1 and the input voltage of the electrostatic dust collection module 2 to improve the purification effect of the air purification device, so that the dust concentration of the air purified by the air purification device is reduced.

[0132] Step S7: the control module does not increase the input voltage of the charging module 1 and the electrostatic dust collection module 2.

[0133] When the primary filtration efficiency of the air purification device is greater than or equal to the first preset filtration efficiency or the dust concentration after purification is greater than or equal to the preset dust concentration, it indicates that the purification effect of the air purification device is good. If the input voltage of the charging module 1 and the electrostatic dust collection module 2 has not been increased, the control module does not need to increase the input voltage of the charging module 1 and the electrostatic dust collection module 2. If the input voltage of the charging module 1 and the electrostatic dust collection module 2 has been increased, the control module will no longer increase the input voltage of the charging module 1 and the input voltage of the electrostatic dust collection module 2.

[0134] In an illustrative embodiment, in step S6, the range of the increase in the input voltage of the charging module 1 and the electrostatic precipitator module 2 is -1.5 kV to -2.5 kV. The increase in the input voltage of the charging module 1 and the electrostatic precipitator module 2 is preferably -2 kV.

[0135] Increasing the input voltage of the charging module 1 and the electrostatic dust collecting module 2 by -1.5 kV to -2.5 kV can significantly improve the purification effect of the air purification device and reduce the dust concentration.

[0136] In an illustrative embodiment, Figure 4 , 6 As shown, the charging module 1 includes a first electrode 111, a second electrode 112 and an insulating bracket 113. The first electrode 111 and the second electrode 112 are both conductors. The first electrode 111 and the second 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 electrode 111 and the second electrode 112 can be the same or different. The shapes of the first electrode 111 and the second electrode 112 are not limited, and can be cylindrical, annular, strip, sheet, block or plate-shaped. The shapes of the first electrode 111 and the second electrode 112 can be the same or different.

[0137] The insulating support 113 is a rigid structure made of insulating material. The insulating support 113 is connected to the first electrode 111 and the second electrode 112. The first electrode 111 and the second electrode 112 are spaced apart. The power module applies a voltage difference between the first electrode 111 and the second electrode 112, and an electric field is generated between the first electrode 111 and the second electrode 112. The electric field ionizes the air so that plasma is generated between the first electrode 111 and the second electrode 112. The voltage difference applied by the power module between the first electrode 111 and the second electrode 112 can be a pulse voltage, a direct current voltage, or an alternating current voltage.

[0138] In an illustrative embodiment, the second electrode 112 is configured as a cylinder. The outer peripheral wall of the second 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 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 electrode 112.

[0139] The internal channels of the second electrodes 112 of the multiple charging modules 1 are connected in sequence. The multiple second electrodes 112 can be coaxially arranged, and the ends of two adjacent second electrodes 112 are mutually abutted so that the internal channels of the two second electrodes 112 are mutually connected. Two adjacent second electrodes 112 in the multiple second electrodes 112 can also be spaced apart from each other, and the internal channels of the two adjacent second electrodes 112 can be mutually connected through the airflow channel 31 between the two second electrodes 112.

[0140] The first electrode 111 is arranged inside the second electrode 112. The first electrode 111 is arranged in a straight strip structure. The first electrode 111 and the second electrode 112 are arranged coaxially. One end of the first 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 electrode 112.

[0141] 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 electrode 112 , and the other end of the insulating support 113 is connected to the middle of the second electrode 112 or an end of the second electrode 112 facing away from the discharge tip 1111 .

[0142] In this way, when a voltage difference is applied between the first electrode 111 and the second electrode 112, since the curvature radius of the discharge tip 1111 is very small, the discharge tip 1111 of the first electrode 111 will discharge uniformly to the second electrode 112, so that the discharge area can cover the gap between the discharge tip 1111 and the second electrode 112. Since the air in the airflow channel 31 must flow through the internal channel of the second 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 electrode 111 is constructed in a straight strip shape and is coaxial with the second electrode 112, which can reduce the resistance to the air and improve the air flow rate.

[0143] In an exemplary embodiment, the second electrode 112 has one end for air intake and another end for air discharge. The discharge tip 1111 of the first electrode 111 faces the end of the second electrode 112 for air intake.

[0144] Since the discharge tip 1111 faces the air intake end of the second electrode 112 , the discharge tip 1111 of the second electrode 112 faces the wind, and the second electrode 112 has less resistance to the air, thereby further improving the air flow rate.

[0145] In an illustrative embodiment, Figure 7 As shown, both ends of the second electrode 112 are configured as discharge tips 1111. Both ends of the first electrode 111 face toward an end of the second electrode 112 where air enters and an end of the second electrode 112 where air exits, respectively.

[0146] When only one discharge tip 1111 of the first electrode 111 discharges, ion wind will be generated. The ion wind will increase the resistance in the second electrode 112 and reduce the static pressure. The ion wind will also hinder the airflow in the second 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 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.

[0147] In an illustrative embodiment, Figure 8 As shown, the second electrode 112 is cylindrical. The outer wall of the second electrode 112 abuts against the inner wall of the airflow channel 31 of the housing 3, and there is no gap between the outer wall of the second electrode 112 and the inner wall of the airflow channel. The air in the airflow channel 31 must flow through the internal channel of the second electrode 112.

[0148] The charging module 1 is provided with two first electrodes 111. Both first electrodes 111 are arranged inside the second electrode 112. The first electrode 111 is arranged in a straight strip structure. Both first electrodes 111 are arranged coaxially with the second electrode 112. One end of the first 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 tips 1111 of the two second electrodes 112 are respectively arranged at the ends of the two second electrodes 112 that are away from each other. The discharge tips 1111 of the two first electrodes 111 are respectively facing the end of the second electrode 112 where the wind enters and the end of the second electrode 112 where the wind exits.

[0149] The insulating support 113 is configured as a strip, and one end of the insulating support 113 is connected to the side wall of the second electrode 112. The other end of the insulating support 113 is connected to the ends of the two first electrodes 111 facing each other. In some embodiments, the insulating support 113 includes two sub-supports 1131. Both sub-supports 1131 are configured as strips. One end of the two sub-supports 1131 is respectively connected to the ends of the two first electrodes 111 close to each other, and the other ends of the two sub-supports 1131 are connected to the side wall of the second electrode 112.

[0150] The discharge tips 1111 of the two first electrodes 111 can both discharge, and the discharge tips 1111 of the two first electrodes 111 face the windward direction and the leeward direction respectively. The effects of the ion wind generated by the discharge tips 1111 of the two first electrodes 111 simultaneously discharging on the airflow can offset each other, thereby not affecting the air volume. In addition, the discharge of the discharge tips 1111 of the two first electrodes 111 can also increase the probability of particle charging and improve the air purification effect.

[0151] In an illustrative embodiment, the negative electrode of the power module applies a negative high voltage to the first electrode 111, and the voltage applied to the first electrode 111 ranges from -2.5 kV to -10.5 kV. The voltage applied to the first electrode 111 is preferably -8.5 kV. The second electrode 112 is grounded, and the positive electrode of the power module is grounded.

[0152] In this way, the voltage difference between the first electrode 111 and the second electrode 112 is -1 kV to -20 kV, which can break through the air to generate plasma.

[0153] In an illustrative embodiment, the charging form of the charging module 1 may also include needle plate plasma, carbon brush plus syringe plasma, etc.

[0154] 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.

[0155] 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.

[0156] 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: A shell body having an air flow channel therein; A charging module, the charging module is configured to ionize the air so that particles in the air are charged; as well as an electrostatic dust collection module, disposed in the airflow channel and downstream of the charging module, configured to apply an electrostatic field to adsorb charged particles; A fan, used for driving the air in the air flow channel to flow through the charging module and the electrostatic dust collection module in sequence; a power module, electrically connected to the charging module and the electrostatic dust collection module, and configured to supply power to the charging module and the electrostatic dust collection module; a first dust sensor, used to measure the dust concentration of the air input into the air flow channel before purification; The control module is electrically connected to the power module and the first dust sensor, and is configured to adjust the input voltage of the charging module according to the current dust concentration before purification, and the absolute value of the input voltage of the charging module tends to increase with the increase of the dust concentration before purification.

2. The air purification device according to claim 1, It is characterized in that The step of adjusting the input voltage of the charging module according to the current dust concentration before purification includes: Determine the value interval to which the current dust concentration before purification belongs, and adjust the input voltage of the charging module to a charging input voltage corresponding to the value interval; Among them, the value range of the dust concentration before purification is divided into multiple non-overlapping value intervals, and the multiple value intervals correspond to multiple charging input voltages one by one. The larger the value of the value interval, the larger the absolute value of the charging input voltage corresponding to it.

3. The air purification device according to claim 1, It is characterized in that The absolute value of the input voltage of the charging module is positively correlated with the dust concentration before purification.

4. The air purification device according to claim 3, It is characterized in that The input voltage of the charging module is determined according to the following formula: Wherein, Vh is the input voltage of the charging module, in kV; P 1 is the current dust concentration before purification; p is the voltage coefficient, P 1 Same units as p.

5. The air purification device according to any one of claims 1 to 4, It is characterized in that The control module is also configured to adjust the input voltage of the electrostatic dust collection module according to the current dust concentration before purification, and the absolute value of the input voltage of the electrostatic dust collection module tends to increase with the increase of the dust concentration before purification.

6. The air purification device according to claim 5, It is characterized in that The step of adjusting the input voltage of the electrostatic dust collection module according to the current dust concentration before purification includes: Determine the value interval to which the current dust concentration before purification belongs, and adjust the input voltage of the electrostatic dust collection module to the dust collection input voltage corresponding to the value interval; Among them, the value range of the dust concentration before purification is divided into multiple non-overlapping value intervals, and the multiple value intervals correspond to multiple dust collection input voltages one by one. The larger the value of the value interval, the larger the absolute value of the dust collection input voltage corresponding to it.

7. The air purification device according to claim 5, It is characterized in that The absolute value of the input voltage of the electrostatic dust collection module is positively correlated with the dust concentration before purification.

8. The air purification device according to claim 7, It is characterized in that The input voltage of the electrostatic dust collection module is determined according to the following formula: Wherein, Vh is the input voltage of the electrostatic dust collection module, in kV; P 1 is the current dust concentration before purification; p is the voltage coefficient, P 1 Same units as p.

9. The air purification device according to claim 5, It is characterized in that Also includes a second dust sensor electrically connected to the control module, the second dust sensor electrically connected to the control module, and used to measure the dust concentration of the air after purification after passing through the electrostatic dust collection module; The control module is also configured to calculate a primary filtration efficiency based on the current dust concentration before purification and the current dust concentration after purification, and increase the input voltage of the charging module and the electrostatic dust collection module based on the fact that the primary filtration efficiency is less than the first preset filtration efficiency and the dust concentration after purification is greater than the preset dust concentration.

10. The air purification device according to claim 9, It is characterized in that The control module is also configured to no longer increase the input voltage of the charging module and the electrostatic dust collection module based on the primary filtration efficiency being greater than or equal to the first preset filtration efficiency or the dust concentration after purification being less than or equal to the preset dust concentration.

11. The air purification device according to claim 9, It is characterized in that The input voltage boost range of the charging module and the electrostatic dust collection module is -1.5 kV to -2.5 kV.

12. The air purification device according to any one of claims 1 to 4, It is characterized in that The charging module includes a first electrode, a second electrode spaced apart from the first electrode, and an insulating bracket connecting the first electrode and the second electrode; The power module applies a voltage difference between the first electrode and the second electrode to generate plasma.

13. The air purification device according to claim 12, It is characterized in that The second electrode is cylindrical in shape, and the outer peripheral wall of the second electrode abuts against the inner peripheral wall of the air flow channel; The first electrode is disposed inside the second electrode and is configured as a straight bar coaxial with the second electrode, and one end of the first electrode is configured as a discharge tip.

14. The air purification device according to claim 13, It is characterized in that The discharge tip faces an end of the second electrode that enters the wind.

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: Obtaining the dust concentration of the air input into the airflow channel before purification; The input voltage of the charging module is adjusted according to the current dust concentration before purification, wherein the absolute value of the input voltage of the charging module tends to increase with the increase of the dust concentration before purification.

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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