Purification device, and air treatment apparatus and control method therefor

Abstract

Provided are a purification device, and an air treatment apparatus and a control method therefor. The purification device comprises a sterilization module and a power supply; the sterilization module comprises a mounting frame (1) and a discharge assembly (2); the mounting frame (1) is provided with an airflow channel (13) through which airflow passes; the discharge assembly (2) is provided in the airflow channel (13), and is configured to generate streamer discharge to ionize air to produce sterilization materials; the discharge assembly (2) comprises a discharge electrode (21) and a receiving electrode (22), the discharge electrode (21) comprises a discharge portion (212), the discharge portion (212) comprises a plurality of discharge tips (2121), and the receiving electrode (22) and the discharge portion (212) are arranged opposite to each other at an interval; the power supply is electrically connected to the discharge assembly (2); the power supply comprises a direct-current high voltage power supply and a pulse power supply which are independent from each other, the direct-current high voltage power supply and the pulse power supply are configured to, by means of voltage superimposition, output a pulse drive voltage with a bias, and the pulse drive voltage with a bias is loaded between the discharge electrode (21) and the receiving electrode (22).

Description

Purification device, air treatment equipment and control method thereof

[0001] This application claims priority to the Chinese patent application filed on June 20, 2023, with application number 202310739456.9 and invention name “A purification device, air treatment equipment and control method thereof”, the content of which should be understood as incorporated into this application by reference. Technical Field

[0002] This article relates to but is not limited to the field of air purification technology, and in particular to a purification device, air treatment equipment and a control method thereof. Background Art

[0003] Currently, common indoor sterilization methods rely on low-temperature plasma sterilization. For example, these methods generate low-temperature plasma through dielectric barrier discharge or corona discharge, releasing the resulting plasma into the air to sterilize it. However, these methods are often not directly observable, making it difficult to perceive the sterilization effect. Furthermore, due to the limitations of the low-temperature plasma generation technology, the generated sterilizing substances have difficulty in fully contacting the air, reducing the sterilization effect.

[0004] Summary of the Invention

[0005] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0006] An embodiment of the present disclosure provides a purification device, comprising: a sterilization module, comprising a mounting frame and a discharge assembly, the mounting frame being provided with an airflow channel for airflow to pass through, the discharge assembly being arranged in the airflow channel and being configured to generate streamer discharge to ionize air and produce sterilizing substances; the discharge assembly comprising a discharge electrode and a receiving electrode, the discharge electrode comprising a discharge portion, the discharge portion comprising a plurality of discharge tips, the receiving electrode and the discharge portion being arranged relative to each other; and a power supply electrically connected to the discharge assembly, comprising a mutually independent DC high-voltage power supply and a pulse power supply, the DC high-voltage power supply and the pulse power supply being configured to output a biased pulse drive voltage by mutual superposition of voltages, the biased pulse drive voltage being loaded between the discharge electrode and the receiving electrode.

[0007] An embodiment of the present disclosure also provides an air treatment device, comprising the purification device as described in the above embodiment.

[0008] An embodiment of the present disclosure further provides a control method for the air treatment equipment as described in the above embodiment, the control method comprising: determining a purification mode; and controlling the purification device according to the determined purification mode.

[0009] Still other aspects will become apparent upon reading and understanding the accompanying drawings and detailed description.

[0010] Summary of the Figures

[0011] FIG1 is a schematic diagram of the main structure of a sterilization module provided by one embodiment of the present disclosure;

[0012] FIG2 is a schematic diagram of the main structure of a sterilization module provided in one embodiment of the present disclosure;

[0013] FIG3 is a side structural schematic diagram of the sterilization module shown in FIG2 ;

[0014] FIG4 is a schematic diagram of the main structure of a sterilization module provided in one embodiment of the present disclosure;

[0015] FIG5 is a side structural schematic diagram of the sterilization module shown in FIG4 ;

[0016] FIG6 is a schematic diagram of the three-dimensional structure of a sterilization module provided in one embodiment of the present disclosure;

[0017] FIG7 is a side view schematic diagram of the structure of a sterilization module provided in one embodiment of the present disclosure;

[0018] FIG8 is a side view schematic diagram of the structure of a sterilization module provided in one embodiment of the present disclosure;

[0019] FIG9 is a schematic diagram of the main structure of a sterilization module provided in one embodiment of the present disclosure;

[0020] FIG10 is a schematic diagram of the main structure of a sterilization module provided in one embodiment of the present disclosure;

[0021] FIG11 is a side structural schematic diagram of the sterilization module shown in FIG10 ;

[0022] FIG12 is a schematic diagram of the main structure of a sterilization module provided in one embodiment of the present disclosure;

[0023] FIG13 is a side structural schematic diagram of the sterilization module shown in FIG12 ;

[0024] FIG14 is a waveform diagram showing the voltage of the power supply of the purification device provided by one embodiment of the present disclosure changing with time.

[0025] In Figures 1 to 13 , the components represented by the respective reference numerals are listed as follows:

[0026] 1 mounting frame, 13 air flow channel, 131 ventilation opening;

[0027] 2 discharge assembly, 21 discharge electrode, 211 conductive body, 212 discharge portion, 2121 discharge tip, 22 receiving electrode, 23 insulating member.

[0028] Details

[0029] The principles and features of the embodiments of the present disclosure are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present disclosure and are not used to limit the scope of the present disclosure.

[0030] Dielectric barrier discharge (DBD) is a localized discharge phenomenon that typically occurs in the dielectric medium between two electrodes. The dielectric layer is typically stacked with the electrodes on either side. Because this discharge is typically located within the dielectric, its spectrum is primarily in the ultraviolet and blue regions of the visible spectrum, and its energy is relatively weak, making it difficult to directly observe. Consequently, visualization of the low-temperature plasma generated by conventional DBD is difficult.

[0031] Corona discharge is a low-energy plasma discharge typically generated in gases. For example, in a high-voltage electric field, air molecules are ionized to form ions and free electrons. Because the energy released by corona discharge is relatively low, its spectrum is primarily in the ultraviolet and blue portions of visible light, and its energy is relatively weak, making it difficult to directly observe. Furthermore, corona discharge generally does not spontaneously generate visible light. Therefore, visualization of low-temperature plasma generated by corona discharge for sterilization is difficult.

[0032] On the other hand, conventional purification devices generate low-temperature plasma inside the device, which then diffuses outward and is released into the external environment (such as indoor space). The diffusion range of the sterilizing substance is limited and the contact with the air is not sufficient, which affects the sterilization effect.

[0033] In addition, when conventional purification devices generate low-temperature plasma, they will also produce a large amount of ozone due to the long-term maintenance of high pressure. Excessive ozone will affect the health of users.

[0034] To this end, the embodiment of the present disclosure provides a purification device that can achieve better visualization effects, the generated bactericidal substances can fully contact with the air, and can inhibit the production of ozone.

[0035] The following is a detailed description with reference to the accompanying drawings.

[0036] An embodiment of the present disclosure provides a purification device, including: a sterilization module (as shown in Figures 1 to 13) and a power supply (not shown in the figures).

[0037] The sterilization module includes a mounting frame 1 and a discharge assembly 2. The mounting frame 1 is provided with an airflow channel 13 for airflow. The discharge assembly 2 is located within the airflow channel 13 and is configured to generate streamer discharges to ionize air and produce sterilizing substances. The discharge assembly 2 includes a discharge electrode 21 and a receiving electrode 22. The discharge electrode 21 includes a discharge portion 2121, which includes multiple discharge tips. The receiving electrode 22 is spaced apart from the discharge portion 2121.

[0038] The discharge electrode 21 is an excitable component and can be made of any excitable material. Excitable materials can include, but are not limited to, one or more of metal saw teeth, metal tips, and carbon fiber filaments. The receiving electrode 22 can include, but is not limited to, one or more of a metal perforated plate, a metal mesh, a metal rod, and a metal plate.

[0039] The power supply is electrically connected to the discharge component 2. The power supply includes a DC high-voltage power supply and a pulse power supply that are independent of each other, that is, the DC high-voltage power supply can be turned on and off independently, and the pulse power supply can be turned on and off independently, and the two do not affect each other. The DC high-voltage power supply and the pulse power supply are configured to output a biased pulse drive voltage by superimposing voltages, and the biased pulse drive voltage is loaded between the discharge electrode 21 and the receiving electrode 22, as shown in Figure 14. The power supply mainly serves as a power supply. The power supply can load a driving voltage to the discharge component 2, so that the discharge component 2 can generate a streamer discharge phenomenon. The discharge electrode 21 of the discharge component 2 can be electrically connected to the high-voltage end of the power supply, and the receiving electrode 22 of the discharge component 2 can be electrically connected to the low-voltage end or the ground end of the power supply. Of course, the connection method between the discharge component 2 and the power supply can be changed.

[0040] The sterilization module primarily performs a sterilization function. The mounting frame 1 of the sterilization module primarily serves as a mounting mechanism, while the discharge assembly 2 primarily generates streamer discharge to produce sterilizing substances. On the one hand, the mounting frame 1 provides a mounting carrier for the discharge assembly 2, ensuring its stability and reliability. On the other hand, the mounting frame 1 is provided with an airflow channel 13 for airflow, allowing outside air to enter the airflow channel 13 and be discharged through the airflow channel 13. Thus, the sterilizing substances generated by the streamer discharge of the discharge assembly 2 come into contact with the air in two ways: spontaneously diffusing outward to contact the outside air, and also allowing outside air to enter the airflow channel 13, contact the sterilizing substances, and carry the sterilizing substances out of the airflow channel 13, further contacting the outside air. This facilitates sufficient contact between the sterilizing substances and the air. Thus, compared to conventional designs that achieve sterilization solely through the outward diffusion of sterilizing substances, the sterilizing substances generated by the purification device of this solution can fully contact the air, thereby improving the sterilization and purification effect.

[0041] The mounting frame 1 may also be provided with a corresponding connection structure to connect to a corresponding structure of the air conditioner (or other air handling equipment) to ensure that the purification device can be installed on the air conditioner (or other air handling equipment). The connection structure may include a mechanical connection structure, such as, but not limited to, a screw connection, a snap connection, etc.

[0042] In addition, in the embodiment of the present disclosure, the discharge component 2 generates bactericidal substances by generating streamer discharge. Streamer means that in gas discharge, the degree of ionization in the non-uniform electric field discharge space is significantly greater than the ionization generated by electron avalanche. The high ionization causes the discharge process to produce strong light radiation, and linear, branched ionization channels can be observed. If the discharge electrode is asymmetric, the discharge shape can be further elongated before the voltage rises to the breakdown voltage. This phenomenon is called streamer or streamer. Active substances with chemical properties can be generated during streamer discharge, such as strong oxidizing substances. Strong oxidizing substances can oxidize and decompose bacteria in the air, thereby playing a bactericidal role. Therefore, streamer discharge can be used in purification and sterilization, and it has an additional visual effect, which makes it easier for users to perceive the sterilization effect.

[0043] Furthermore, the discharge portion 212 of the discharge electrode 21 includes multiple discharge tips 2121. The discharge tips 2121, in conjunction with the receiving electrode 22, can produce uneven discharges and achieve an asymmetric design for the discharge assembly 2, thereby enabling the discharge assembly 2 to produce streamer discharges under the action of high voltage electricity. The discharge tips 2121 can also enhance the discharge intensity, thereby increasing the degree of ionization of the air, which is conducive to the production of more sterilizing substances. The shapes of the discharge tips 2121 can be, but are not limited to, triangular, trapezoidal, or sawtooth shapes. The multiple discharge tips 2121 of each discharge portion 212 can be spaced apart (e.g., evenly spaced) or can be adjacent to each other without any spacing.

[0044] In addition, it is difficult to control the discharge effect of the discharge component with a separate DC high-voltage power supply or a separate AC high-voltage power supply or a separate pulse high-voltage power supply, which makes it difficult to control the purification effect of the purification device. In the embodiment of the present disclosure, the power supply includes two independent parts, namely a DC high-voltage power supply and a pulse power supply (such as a pulse high-voltage power supply). The independent DC high-voltage power supply and the pulse power supply can output a biased pulse drive voltage through the mutual superposition of voltages. In this way, the high-voltage part stays at the ignition voltage for a short time, so that the concentration of the strong ionization field is dispersed, which greatly reduces the ignition situation, thereby increasing the voltage working range for the occurrence of streamers, and the stability is also improved, so that the ozone concentration is reduced. Compared with square wave voltage drive, the purification device driven by pulse drive voltage has better purification effect and is easier to control.

[0045] In some exemplary embodiments, as shown in Figure 3, the spacing a between the discharge tip 2121 and the adjacent receiving electrode 22 is in the range of 1mm to 100mm, such as 1mm, 2mm, 3mm, 4mm, 5mm, 8mm, 10mm, 20mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, etc.

[0046] In one embodiment, the distance a between the discharge tip 2121 and the adjacent receiving electrode 22 is in the range of 2 mm to 50 mm.

[0047] In one embodiment, the distance a between the discharge tip 2121 and the adjacent receiving electrode 22 is in the range of 5 mm to 20 mm.

[0048] Setting the distance a between the discharge tip 2121 and the adjacent receiving electrode 22 within the above range can facilitate the use and installation of the entire purification device while ensuring the purification effect.

[0049] Of course, the distance between the discharge tip 2121 and the adjacent receiving electrode 22 is not limited to the above range and can be adjusted according to needs.

[0050] In some exemplary embodiments, as shown in FIG. 1 and FIG. 2 , the discharge electrode 21 may further include a conductive body 211 , and the discharge portion 212 is disposed on the conductive body 211 .

[0051] In this way, the conductive body 211 can serve as a carrier for the multiple discharge tips 2121 of the discharge portion 212 , and the multiple discharge tips 2121 can be energized together by simply connecting the conductive body 211 to a power supply, which also facilitates assembly between the discharge electrode 21 and the mounting frame 1 .

[0052] In some exemplary embodiments, as shown in Figures 1, 6, and 9, the conductive body 211 is circular. Multiple discharge tips 2121 are arranged along the circumference of the conductive body 211 and on its outer periphery. The receiving electrode 22 is cylindrical. The receiving electrode 22 is sleeved outside the discharge electrode 21 and spaced relative to the discharge electrode 21.

[0053] Therefore, the sterilization module as a whole is generally in the shape of a cylinder with an air flow channel 13 provided inside.

[0054] The discharge electrode 21 can be a plate-like structure. The receiving electrode 22 can be a solid electrode or a hollow electrode. A solid electrode refers to the receiving electrode 22 itself (the portion disposed opposite the discharge electrode 21) without a hollow structure, but there is no restriction on the structure formed by the receiving electrode 22. For example, the receiving electrode 22 can be a cylindrical solid plate structure. A hollow electrode refers to the receiving electrode 22 itself (the portion disposed opposite the discharge electrode 21) with a hollow structure. For example, the receiving electrode 22 can be a cylindrical mesh structure (i.e., a mesh electrode), a cylindrical grid structure, a cylindrical perforated plate structure, or a cylindrical structure composed of two spaced-apart annular rod-like structures (i.e., rod-like electrodes).

[0055] In the case where the receiving electrode 22 is a solid electrode, the airflow direction of the airflow channel 13 of the mounting frame 1 can extend along the axial direction of the receiving electrode 22, and the sterilizing substance can be discharged along with the airflow.

[0056] In the case where the receiving electrode 22 is a hollow electrode, the airflow channel 13 is correspondingly provided with a plurality of vents 131, and at least some of the vents 131 are arranged corresponding to the hollow electrode. In this way, the airflow direction of the airflow channel 13 of the mounting frame 1 is not limited to extending along the axial direction of the receiving electrode 22, because the hollow portion of the hollow electrode can also provide airflow. In this way, when the charged particles generated by the discharge component 2 are moved from the discharge electrode 21 to the receiving electrode 22 at high speed under the action of the electric field force, they can drive the air to move toward the receiving electrode 22 and be discharged from the hollow structure of the receiving electrode 22, thereby forming an ion wind, which can enhance the release speed and efficiency of the sterilizing substance. In other words, the discharge component 2 can spontaneously form an ion wind through discharge, blowing outward from all directions, which is conducive to full contact between the sterilizing substance and the air, and is conducive to improving the purification effect.

[0057] The thickness direction of the discharge electrode 21 can be consistent with the axial direction of the receiving electrode 22. The discharge electrode 21 can be coaxially arranged with the receiving electrode 22. The thickness of the discharge electrode 21 can be smaller than the axial dimension of the receiving electrode 22 to ensure that the multiple discharge tips 2121 of the discharge electrode 21 can fully discharge.

[0058] In other exemplary embodiments, the conductive body 211 is a plate-like structure, as shown in Figures 2 to 5. The discharge electrode 21 includes two discharge portions 212. The two discharge portions 212 are disposed opposite each other at opposite ends of the width direction of the conductive body 211. The multiple discharge tips 2121 of the discharge portions 212 are arranged along the length direction of the conductive body 211.

[0059] As shown in Figure 3, the discharge assembly 2 includes at least two receiving electrodes 22. A receiving electrode 22 is provided on either side of the conductive body 211 in the width direction. The two receiving electrodes 22 are spaced relative to the two discharge sections 212 of the discharge electrode 21, enabling both discharge sections 212 of the discharge electrode 21 to generate streamer discharges and produce sterilizing substances.

[0060] In other words, the discharge assembly 2 includes a discharge electrode 21 and at least two receiving electrodes 22. The discharge electrode 21 is a high-voltage electrode connected to the high-voltage side of the power supply. The receiving electrode 22 is a low-voltage or grounded electrode that can be connected to the low-voltage or ground side of the power supply. The discharge electrode 21 includes a conductive body 211 and two discharge sections 212 disposed at either end of the conductive body 211 in its width direction. Opposite each discharge section 212 is a receiving electrode 22. This allows one discharge electrode 21 to correspond to two receiving electrodes 22, creating two strong electric fields. This facilitates the generation of more sterilizing substances. Furthermore, eliminating one discharge electrode 21 simplifies the structure of the purification device and reduces production costs.

[0061] The multiple discharge tips 2121 of each discharge portion 212 can be arranged at intervals (such as equal intervals), or can be adjacent to each other without intervals. The two discharge portions 212 can be symmetrically arranged at both ends of the conductive body 211, or can be appropriately staggered in the longitudinal direction of the conductive body 211.

[0062] The conductive body 211 is a plate-like structure (or sheet-like structure), which can be in the form of an elongated strip (e.g., a rectangle). Two discharge portions 212 are disposed opposite each other at opposite ends of the conductive body 211 in the width direction, facing the receiving electrodes 22 disposed on either side of the conductive body 211 in this direction. Therefore, the discharge tips 2121 of the discharge portions 212 are also tapered along the width of the conductive body 211. This allows for direct processing of a single conductive sheet to produce an integrally formed discharge electrode 21. Compared to solutions that involve inserting or welding needle-like structures onto the surface of a plate-like structure to form the discharge tips 2121, this solution is less difficult to manufacture and is easier to process.

[0063] The width of the conductive body 211 can be greater than the protruding length of the discharge tip 2121 (i.e., the dimension of the discharge tip 2121 along the width of the conductive body 211). This allows for a certain distance between the two discharge portions 212 of a discharge electrode 21, making it less likely for them to affect each other during discharge, leading to breakdown and damage to the discharge electrode 21. This helps ensure the reliability of the discharge electrode 21.

[0064] The discharge electrode 21 can be a plate-like structure. The receiving electrode 22 can be a solid electrode or a hollow electrode. A solid electrode refers to the receiving electrode 22 itself (the portion opposite the discharge electrode 21) without a hollow structure, but there is no restriction on the structure of the receiving electrode 22. For example, the receiving electrode 22 can be a solid flat plate structure. A hollow electrode refers to the receiving electrode 22 itself (the portion opposite the discharge electrode 21) with a hollow structure. For example, the receiving electrode 22 can be a mesh structure (i.e., a mesh electrode), a grid structure, a perforated plate structure, or two spaced-apart rod-like structures (i.e., a rod-like electrode).

[0065] In the case where the receiving electrode 22 is a solid electrode, the airflow direction of the airflow channel 13 of the mounting frame 1 can extend along the gap between the discharge electrode 21 and the receiving electrode 22 (or along the width direction of the receiving electrode 22 / the thickness direction of the discharge electrode 21), and the sterilization substance can be discharged with the airflow.

[0066] In the case where the receiving electrode 22 is a hollow electrode, the airflow channel 13 is correspondingly provided with a plurality of vents 131, with at least some of the vents 131 being arranged corresponding to the hollow electrodes. Thus, the airflow direction of the airflow channel 13 of the mounting frame 1 is not limited to extending along the gap between the discharge electrode 21 and the receiving electrode 22, because the hollow portion of the hollow electrode can also provide airflow. Thus, when the charged particles generated by the discharge component 2 are moved at high speed from the discharge electrode 21 to the receiving electrode 22 under the action of the electric field force, they can drive the air toward the receiving electrode 22 and be discharged from the hollow structure of the receiving electrode 22, thereby forming an ion wind that can enhance the release speed and efficiency of the sterilizing substance. In other words, the discharge component 2 can spontaneously form an ion wind through discharge, blowing outward from all directions, which is conducive to sufficient contact between the sterilizing substance and the air and is conducive to improving the purification effect.

[0067] The thickness direction of the discharge electrode 21 can coincide with the width direction of the receiving electrode 22. The discharge electrode 21 can be completely or partially opposite the receiving electrode 22. The thickness of the discharge electrode 21 is less than or equal to the width of the receiving electrode 22, and the length of the receiving electrode 22 is greater than or equal to the length of the discharge electrode 21 to ensure that the multiple discharge tips 2121 of the discharge electrode 21 can fully discharge. The width, thickness, and length directions marked in Figures 2 to 5 refer to the width, thickness, and length directions of the discharge electrode 21. The width direction of the receiving electrode 22 coincides with the thickness direction of the discharge electrode 21, and the thickness direction of the receiving electrode 22 coincides with the width direction of the discharge electrode 21.

[0068] In some embodiments, the discharge electrode 21 is a plate-like structure, and the receiving electrode 22 is a plate-like structure or a mesh-like structure. The width direction of the conductive body 211 is perpendicular to the width direction of the receiving electrode 22.

[0069] In other words, the discharge electrode 21 and the receiving electrode 22 are perpendicular to each other. In this way, the arrangement of the discharge electrode 21 and the receiving electrode 22 is relatively regular, which is convenient for assembly and fixation on the mounting frame 1.

[0070] In some embodiments, the discharge assembly 2 includes a plurality of discharge electrodes 21 , such as two, three, or even more discharge electrodes 21 , spaced apart along the thickness direction of the conductive body 211 and located between the two receiving electrodes 22 .

[0071] In other words, in the thickness direction of the conductive body 211: the discharge component 2 can include multiple discharge electrodes 21, and the two receiving electrodes 22 can be used in conjunction with multiple discharge electrodes 21. Since each discharge electrode 21 has two discharge parts 212, the sterilization module has more discharge points and can produce more sterilization substances, which is beneficial to improving the purification effect of the purification device without increasing the volume of the purification device.

[0072] The thickness of the conductive body 211 can be aligned with the thickness of the purification device. This solution achieves the effect of an array arrangement of sterilization modules along the thickness of the purification device without increasing the size of the purification device. Alternatively, multiple sterilization modules can be arranged in an array along the thickness of the purification device to achieve the same effect.

[0073] The airflow direction of the airflow channel 13 may be consistent with the thickness direction of the purification device.

[0074] In one embodiment, the plurality of discharge electrodes 21 of the discharge assembly 2 are arranged in parallel and at equal intervals in the thickness direction of the conductive body 211 .

[0075] In some embodiments, as shown in FIG4 and FIG5 , the discharge assembly 2 includes a plurality of discharge electrodes 21 spaced apart along the width direction of the conductive body 211 , and a receiving electrode 22 is provided between two adjacent discharge electrodes 21 in the width direction of the conductive body 211 .

[0076] In other words, across the width of the conductive body 211, the discharge assembly 2 can include multiple discharge electrodes 21 (though it can also include just one), and each discharge electrode 21 is still used in conjunction with two receiving electrodes 22. Because each discharge electrode 21 has two discharge portions 212, the sterilization module has more discharge points, generating more sterilizing substances and improving the sterilization effectiveness of the purification device. The width of the mounting frame 1 is correspondingly increased to accommodate more discharge electrodes 21 and receiving electrodes 22 within the airflow channel 13.

[0077] In the width direction of the conductive body 211, two adjacent discharge electrodes 21 can share a receiving electrode 22. This helps reduce the number of receiving electrodes 22, thereby simplifying the structure of the purification device and reducing the cost of the purification device. Of course, in the width direction of the conductive body 211, two adjacent discharge electrodes 21 may not share a receiving electrode 22.

[0078] The width of the conductive body 211 can be aligned with the width of the purification device. This solution effectively achieves the effect of an array arrangement of sterilization modules across the width of the purification device. Alternatively, multiple sterilization modules can be arranged in an array across the width of the purification device to achieve the desired effect.

[0079] In one embodiment, the plurality of discharge electrodes 21 of the discharge assembly 2 are arranged in parallel and at equal intervals in the width direction of the conductive body 211 .

[0080] In some exemplary embodiments, an insulating member 23 is further provided between the discharge electrode 21 and the receiving electrode 22 , as shown in FIG. 9 to FIG. 13 .

[0081] In this way, the medium between the discharge electrode 21 and the receiving electrode 22 includes not only air but also an insulating member 23, that is, there are at least two layers of dielectrics, forming a multi-layer dielectric barrier discharge structure, which can enhance the degree of ionization, thereby facilitating the production of more active substances, further improving the purification efficiency, and inhibiting the production of ozone.

[0082] The insulating member 23 is made of a dielectric material having high resistivity and high dielectric constant, including but not limited to polytetrafluoroethylene, epoxy resin, quartz, glass, alumina and the like.

[0083] The thickness of the insulating member 23 may be, but is not limited to, in the range of 0.1 mm to 10 mm, such as 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 2 mm, 3 mm, 5 mm, 8 mm, 10 mm, etc. In one example, the thickness of the insulating member 23 may be set in the range of 0.1 mm to 3 mm.

[0084] The insulating member 23 may be directly disposed on the receiving electrode 22 to form an insulating layer, so that the discharge electrode 21 and the receiving electrode 22 form a double-layer dielectric barrier discharge structure.

[0085] The insulating member 23 may be disposed between the discharge electrode 21 and the receiving electrode 22 and spaced apart from both the discharge electrode 21 and the receiving electrode 22 , so that the discharge electrode 21 and the receiving electrode 22 form a three-layer dielectric (air layer + insulating layer + air layer) barrier discharge structure.

[0086] In some exemplary embodiments, the discharge electrode 21 is a plate-shaped structure, i.e., a plate-shaped electrode, such as a flat plate electrode, as shown in Figures 2 to 5. The thickness of the discharge electrode 21 can be, but is not limited to, in the range of 0.1 mm to 30 mm, such as 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 2 mm, 3 mm, 5 mm, 8 mm, 10 mm, 12 mm, 15 mm, 18 mm, 20 mm, 22 mm, 25 mm, 28 mm, 30 mm, etc.

[0087] In one embodiment, the thickness of the discharge electrode 21 is in the range of 0.2 mm to 10 mm.

[0088] In one embodiment, the thickness of the discharge electrode 21 is in the range of 0.5 mm to 1 mm.

[0089] In some exemplary embodiments, the receiving electrode 22 is a plate-like structure, i.e., a plate-shaped electrode, such as a flat plate electrode, as shown in Figures 3, 5, 11, and 13. The flat plate electrode can also serve as a dust collecting electrode to achieve a particulate matter removal function. The thickness of the receiving electrode 22 can be, but is not limited to, in the range of 0.1 mm to 60 mm, such as 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 2 mm, 3 mm, 5 mm, 8 mm, 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, 50 mm, 55 mm, 60 mm, etc.

[0090] In one embodiment, the thickness of the receiving electrode 22 is in the range of 0.2 mm to 10 mm.

[0091] In one embodiment, the thickness of the receiving electrode 22 is in the range of 0.5 mm to 5 mm.

[0092] In some exemplary embodiments, the receiving electrode 22 has a mesh structure, i.e., a mesh electrode (not shown). The wire diameter of the receiving electrode 22 can be, but is not limited to, in the range of 0.1 mm to 0.3 mm, such as 0.1 mm, 0.2 mm, 0.3 mm, etc. The mesh size of the receiving electrode 22 can be, but is not limited to, in the range of 30 to 40 mesh, such as 30 mesh, 32 mesh, 34 mesh, 35 mesh, 36 mesh, 38 mesh, 40 mesh, etc.

[0093] In some exemplary embodiments, the receiving electrode 22 includes two rod-shaped electrodes, as shown in Figures 7 and 8. The diameter of the rod-shaped electrodes can be, but is not limited to, in the range of 0.1 mm to 20 mm, such as 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 2 mm, 3 mm, 5 mm, 8 mm, 10 mm, 15 mm, 20 mm, etc.

[0094] In one embodiment, the diameter d of the rod-shaped electrode is in the range of 0.5 mm to 5 mm.

[0095] By limiting the diameter of the rod-shaped electrode to the above range, a favorable potential difference can be formed, thereby achieving a better ion acceleration effect.

[0096] The length direction of the rod-shaped electrode may be consistent with the length direction of the discharge electrode 21 , that is, the rod-shaped electrode may be arranged parallel to and spaced apart from the discharge electrode 21 .

[0097] In some exemplary embodiments, there are multiple discharge components 2, and the multiple discharge components 2 are spaced apart along the length direction of the conductive body 211 to achieve an array arrangement in the length direction, which can increase the amount of active material produced and is conducive to improving the purification effect.

[0098] In other words, in the embodiments of the present disclosure, the sterilization module has various structural forms, and the structural parameters can be reasonably designed according to needs.

[0099] In one embodiment, as shown in FIG1 , the discharge electrode 21 may further include a conductive body 211, with a discharge portion 212 disposed on the conductive body 211. The conductive body 211 is a circular structure, with a plurality of discharge tips 2121 arranged along the circumference of the conductive body 211 and on the outer periphery of the conductive body 211. The receiving electrode 22 is cylindrical and is disposed outside the discharge electrode 21, spaced relative to the discharge electrode 21.

[0100] The discharge tip 2121 is in a sawtooth, needle or wire shape.

[0101] In one example, as shown in FIG1 , the receiving electrode 22 is a solid electrode, for example, a cylindrical solid plate electrode.

[0102] In another example, as shown in FIG9 , the receiving electrode 22 is a solid electrode, such as a cylindrical solid plate electrode, and the receiving electrode 22 is covered with an insulating dielectric layer.

[0103] In another example, as shown in FIG6 , the receiving electrode 22 is a hollow electrode, such as a cylindrical mesh electrode or two spaced-apart rod electrodes. Accordingly, the airflow channel 13 is provided with a plurality of vents 131 , at least some of which are arranged corresponding to the hollow electrodes.

[0104] In another embodiment, as shown in Figures 2 and 3, the conductive body 211 is a plate-shaped structure, and the discharge electrode 21 includes two discharge portions 212, which are arranged opposite to each other at the ends of the width direction of the conductive body 211. The multiple discharge tips 2121 of the discharge portion 212 are arranged along the length direction of the conductive body 211.

[0105] The discharge assembly 2 includes at least two receiving electrodes 22, one on each side of the conductive body 211 in the width direction. The two receiving electrodes 22 are spaced relative to the two discharge portions 212 of the discharge electrode 21 so that both discharge portions 212 of the discharge electrode 21 can generate streamer discharge to produce sterilizing substances.

[0106] In one example, the receiving electrode 22 is a solid electrode, for example, a solid plate-shaped electrode, as shown in FIG. 2 and FIG. 3 .

[0107] The discharge assembly 2 may include a plurality of discharge electrodes 21 spaced apart along the width direction of the conductive body 211 , and a receiving electrode 22 is provided between two adjacent discharge electrodes 21 in the width direction of the conductive body 211 , as shown in FIG. 4 and FIG. 5 .

[0108] In another example, the receiving electrode 22 is a solid electrode, such as a flat solid plate electrode, and the receiving electrode 22 is covered with an insulating dielectric layer, as shown in FIG. 10 and FIG. 11 .

[0109] The discharge assembly 2 may include a plurality of discharge electrodes 21 spaced apart along the width direction of the conductive body 211 , and a receiving electrode 22 is provided between two adjacent discharge electrodes 21 in the width direction of the conductive body 211 , as shown in FIG12 and FIG13 .

[0110] In another example, the receiving electrode 22 is a hollow electrode, which can be a flat mesh electrode or two spaced rod electrodes, as shown in Figure 7. Accordingly, the air flow channel 13 has a plurality of vents 131, at least some of which are arranged corresponding to the hollow electrodes.

[0111] The discharge assembly 2 may include a plurality of discharge electrodes 21 spaced apart along the width direction of the conductive body 211 , as shown in FIG8 , and a receiving electrode 22 is provided between two adjacent discharge electrodes 21 in the width direction of the conductive body 211 .

[0112] The embodiment of the present disclosure also provides an air treatment device (not shown in the figure), which includes a purification device as in any one of the above embodiments, and thus has all the above-mentioned beneficial effects, which will not be repeated here.

[0113] The air treatment equipment may be, but is not limited to, an air conditioner, an air purifier, a humidifier or other air treatment equipment.

[0114] The present disclosure also provides a control method for the air handling equipment according to the above embodiment. The control method includes:

[0115] Determine the purification mode;

[0116] The purification device is controlled according to the determined purification mode.

[0117] Among them, the method for determining the purification mode can come from user instructions, such as the user operating the corresponding operating components of the air treatment equipment (such as buttons, knobs, touch screens, remote controls, etc.), or sending purification mode instructions through terminal devices (such as mobile phone apps, etc.).

[0118] The method for determining the purification mode may be determined by the machine itself through detection. For example, if it is detected that the concentration of air pollutants is within the set threshold range corresponding to each purification mode, purification processing is performed through the corresponding purification mode.

[0119] In some exemplary embodiments, controlling a purification device according to a determined purification mode includes:

[0120] Determining the operating voltage of the DC high-voltage power supply, the voltage amplitude and the pulse interval of the pulse power supply according to the determined purification mode;

[0121] According to the determined working voltage of the DC high-voltage power supply, the voltage amplitude of the pulse power supply and the pulse interval, the DC high-voltage power supply and the pulse power supply are turned on, so that the power supply loads a biased pulse driving voltage to the discharge component 2, as shown in FIG14 .

[0122] In other words, in each working cycle, the DC high voltage power supply and the pulse power supply are turned on at the same time, but the DC high voltage power supply is continuously turned on during the working cycle, while the pulse power supply is turned on for a period of time and then turned off for the rest of the time.

[0123] By controlling the output voltage of the DC high-voltage power supply and the output voltage and on-off time of the pulse power supply, the DC high-voltage power supply and the pulse power supply can output a biased pulse drive voltage through voltage superposition.

[0124] The DC high-voltage power supply can be used to provide a reference voltage (or bias voltage, i.e., the valley voltage of the pulse drive voltage). The pulse power supply can be a pulse high-voltage power supply. The pulse high-voltage power supply can adjust the peak voltage (or amplitude voltage) of the biased pulse drive voltage by adjusting its output voltage; and the frequency and period of the biased pulse drive voltage can be adjusted by controlling the pulse interval of the pulse high-voltage power supply.

[0125] In some embodiments, the waveform of the pulse voltage output by the pulse power supply may be a double-exponential pulse waveform, and the amplitude and frequency of the double-exponential pulse waveform are adjustable.

[0126] As shown in Figure 14, the vertical axis V0 represents the operating voltage of the power supply, the horizontal axis T represents time, and Vp represents the amplitude voltage of the biased pulse drive voltage. The PWM (Pulse Width Modulation) signal period is denoted as T, Ton is the on-time of the PWM signal, and Toff is the off-time of the PWM signal. The control signal PWM signal period T = Ton + Toff, and the duty cycle of the PWM signal, Duty, = Ton / T. By changing the duty cycle of the PWM signal, the amplitude of the bi-exponential pulse waveform can be changed, and the duty cycle of the PWM signal can be positively correlated with the amplitude of the bi-exponential pulse waveform. As the duty cycle of the PWM signal decreases, the amplitude of the bi-exponential pulse waveform decreases; conversely, the amplitude of the bi-exponential pulse waveform increases.

[0127] The PWM signal interval is denoted as Ts. By changing the interval Ts of each PWM signal, the repetition frequency of the bi-exponential pulse waveform can be adjusted. The PWM signal interval and the repetition frequency of the bi-exponential pulse waveform are negatively correlated. As the PWM signal interval Ts increases, the repetition frequency Fm of the bi-exponential pulse waveform decreases; as the PWM signal interval Ts decreases, the repetition frequency Fm of the bi-exponential pulse waveform increases.

[0128] In some exemplary embodiments, the purification mode includes a first purification mode, a second purification mode, and a third purification mode. The maximum operating voltage of the power supply is Umax0, the maximum operating voltage of the DC high voltage power supply is Umax1, and the maximum operating voltage of the pulse power supply is Umax2.

[0129] Umax0 is the maximum operating voltage of the power supply. This is the maximum voltage value obtained by combining the operating voltages of the DC high-voltage power supply and the pulse power supply. It is also the maximum peak voltage of the biased pulse drive voltage. During operation, the combined voltage value of the DC high-voltage power supply and the pulse power supply cannot exceed Umax0.

[0130] The operating voltage of the DC high-voltage power supply, the voltage amplitude of the pulse power supply, and the pulse interval are determined according to the determined purification mode, including:

[0131] Based on the determined purification mode being the first purification mode, the operating voltage of the DC high-voltage power supply is determined to be the first operating voltage U1, the voltage amplitude of the pulse power supply is determined to be the second operating voltage U2, the pulse interval is determined to be T1, and U1=Umax0 / 2, U2=Umax0-U1;

[0132] Based on the determined purification mode being the second purification mode, determining that the operating voltage of the DC high-voltage power supply is the third operating voltage U3, the voltage amplitude of the pulse power supply is the fourth operating voltage U4, the pulse interval time is T2, and U3 is less than Umax0 / 2, and U4 is less than Umax0-U3;

[0133] Based on the determination that the purification mode is the third purification mode, the working voltage of the DC high-voltage power supply is determined to be the fifth working voltage U5, the voltage amplitude of the pulse power supply is the sixth working voltage U6, the pulse interval time is T3, and U5>Umax0 / 2, U6≤Umax0-U5.

[0134] When the determined purification mode is the first purification mode, the DC high-voltage power supply is continuously turned on at the first operating voltage U1, and the pulse power supply is turned on at an amplitude voltage of the second operating voltage U2 and a pulse interval of T1. When the determined purification mode is the second purification mode, the DC high-voltage power supply is continuously turned on at the third operating voltage U3, and the pulse power supply is turned on at an amplitude voltage of the fourth operating voltage U4 and a pulse interval of T2. When the determined purification mode is the third purification mode, the DC high-voltage power supply is continuously turned on at the fifth operating voltage U5, and the pulse power supply is turned on at an amplitude voltage of the sixth operating voltage U6 and a pulse interval of T3.

[0135] Wherein, U1 = Umax0 / 2, U2 = Umax0-U1. U3 < Umax0 / 2, U4 ≤ Umax0-U3. U5 > Umax0 / 2, U6 ≤ Umax0-U5. T1, T2, and T3 can be the same or different. In some examples, T3 < T1 < T2.

[0136] The first purification mode can be called the normal purification mode. In the normal purification mode, the reference voltage (i.e., the minimum voltage of the biased pulse drive voltage) is equal to half of the maximum operating voltage of the power supply. This is relatively moderate, which can maintain relatively high purification efficiency without generating excessive ozone, and can be used for whole-house indoor purification.

[0137] The second purification mode can be called the long-term purification mode. In the long-term purification mode, the reference voltage (i.e., the minimum voltage of the biased pulse drive voltage) is less than half of the maximum operating voltage of the power supply. Compared with the normal purification mode, the voltage value of the reference voltage is lowered. This can further reduce the amount of ozone generated, allowing the purification device to purify safely for a long time without worrying about excessive ozone concentration caused by long-term operation of the purification device, thus eliminating the need to shut down the purification device regularly.

[0138] The third purification mode can be called high-efficiency purification mode. In high-efficiency purification mode, the reference voltage (i.e., the minimum voltage of the biased pulse drive voltage) is greater than half of the maximum operating voltage of the power supply. Compared with the normal purification mode, the voltage value of the reference voltage is increased. This can increase the release rate of the bactericidal substance, achieve better purification effects in a short time, facilitate rapid indoor purification, and achieve the purpose of energy saving and high efficiency.

[0139] In some exemplary embodiments, controlling the purification device according to the determined purification mode may further include:

[0140] Based on the determined purification mode being the first purification mode, controlling the power supply to work for N1 cycles and then shut down;

[0141] Based on the determined purification mode being the third purification mode, the power supply is controlled to be turned off after operating for N2 cycles, where N2 is less than N1.

[0142] Because the reference voltage for the first and third purification modes is relatively high, prolonged operation may lead to an accumulation of ozone, resulting in concentration exceeding the standard. Therefore, the first and third purification modes can be shut down on a timed basis. Since the reference voltage for the third purification mode is higher than that for the first purification mode, the number of operating cycles (N2) for the third purification mode must be less than the number of operating cycles (N1) for the first purification mode to ensure that ozone concentration does not exceed the standard. The specific values ​​of N1 and N2 are related to the size of the indoor space and the internal area of ​​the machine.

[0143] Of course, no matter which purification mode, it can be ended and exited under the user's instructions.

[0144] In some exemplary embodiments, Umax1=Umax2=Umax0.

[0145] To sum up, the control method provided in the embodiment of the present disclosure utilizes the principle of streamer energy to construct a visual purification system. By controlling the voltage and the on / off time, a variety of different purification modes can be achieved, which can be freely switched according to user needs and usage scenarios.

[0146] The embodiments of the present disclosure also provide a control device, including a processor and a memory storing a computer program. When the processor executes the computer program, the steps of the control method as described in any of the above embodiments are implemented, thereby having all the above-mentioned beneficial effects, which will not be repeated here.

[0147] The processor may be an integrated circuit chip with signal processing capabilities. The above-mentioned processor may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. It can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present invention. The general-purpose processor may be a microprocessor or the processor or any conventional processor, etc.

[0148] The embodiment of the present disclosure also provides an air treatment device, including the above-mentioned control device, which has all the above-mentioned beneficial effects and will not be repeated here.

[0149] In the description of the embodiments of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present disclosure.

[0150] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the embodiments of the present disclosure, the meaning of "plurality" is at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0151] In the embodiments of the present disclosure, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," and the like should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integrated connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; they may refer to internal connections between two elements or interactions between two elements, unless otherwise expressly limited. A person of ordinary skill in the art can understand the meaning of the above terms in the embodiments of the present disclosure according to the circumstances.

[0152] In the present disclosure, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0153] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and features of different embodiments or examples, unless they are mutually inconsistent.

[0154] Although the embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are illustrative and are not to be construed as limitations on the present disclosure. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present disclosure.

[0155] In any one or more of the above exemplary embodiments, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored as one or more instructions or codes on or transmitted via a computer-readable medium and executed by a hardware-based processing unit. The computer-readable medium may include a computer-readable storage medium corresponding to a tangible medium such as a data storage medium, or a communication medium that facilitates the transfer of a computer program from one place to another, such as according to a communication protocol. In this manner, a computer-readable medium may generally correspond to a non-transitory tangible computer-readable storage medium or a communication medium such as a signal or carrier wave. The data storage medium may be any available medium that can be accessed by one or more computers or one or more processors to retrieve instructions, codes, and / or data structures for implementing the techniques described in this disclosure. A computer program product may include a computer-readable medium.

[0156] By way of example and not limitation, such computer-readable storage media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage, flash memory, or any other medium that can be used to store desired program code in the form of instructions or data structures and that can be accessed by a computer. Furthermore, any connection may also be referred to as a computer-readable medium. For example, if instructions are transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwaves, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwaves are included in the definition of medium. However, it should be understood that computer-readable storage media and data storage media do not include connections, carrier waves, signals, or other transient (transient) media, but rather refer to non-transient tangible storage media. As used herein, disk and optical disk include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk, or Blu-ray disc, among others, where disks typically reproduce data magnetically, while optical discs use lasers to reproduce data optically. Combinations of the above should also be included within the scope of computer-readable media.

[0157] For example, instructions may be executed by one or more processors, such as one or more digital signal processors (DSPs), general-purpose microprocessors, application-specific integrated circuits (ASICs), field-programmable logic arrays (FPGAs), or other equivalent integrated or discrete logic circuits. Thus, the term "processor," as used herein, may refer to any of the aforementioned structures or any other structure suitable for implementing the techniques described herein. Additionally, in some aspects, the functionality described herein may be provided within dedicated hardware and / or software modules configured for encoding and decoding, or incorporated into a combined codec. Furthermore, the techniques may be fully implemented in one or more circuits or logic elements.

[0158] The technical solutions of the embodiments of the present disclosure can be implemented in a wide variety of devices or equipment, including wireless mobile phones, integrated circuits (ICs), or a group of ICs (e.g., chipsets). Various components, modules, or units are described in the embodiments of the present disclosure to emphasize the functional aspects of the devices configured to perform the described techniques, but they do not necessarily need to be implemented by different hardware units. Instead, as described above, the various units can be combined in a codec hardware unit or provided by a collection of interoperable hardware units (including one or more processors as described above) in combination with appropriate software and / or firmware.

Claims

1. A purification device, comprising: The sterilization module comprises a mounting frame and a discharge assembly, wherein the mounting frame is provided with an air flow channel for air flow to pass through; The discharge assembly is arranged in the airflow channel, and is arranged to generate streamer discharge to ionize air and produce sterilizing substances; the discharge assembly includes a discharge electrode and a receiving electrode, the discharge electrode includes a discharge portion, the discharge portion includes a plurality of discharge tips, and the receiving electrode is arranged relative to the discharge portion at an interval; and A power supply is electrically connected to the discharge component, and includes a DC high-voltage power supply and a pulse power supply that are independent of each other. The DC high-voltage power supply and the pulse power supply are configured to output a biased pulse drive voltage by superimposing voltages on each other, and the biased pulse drive voltage is loaded between the discharge electrode and the receiving electrode.

2. The purification device according to claim 1, wherein: The discharge electrode further includes a conductive body, and the discharge portion is arranged on the conductive body.

3. The purification device according to claim 2, wherein: The conductive body is a circular structure, and the plurality of discharge tips are arranged on the outer periphery of the conductive body along the circumference of the conductive body; the receiving electrode is cylindrical, and the receiving electrode is sleeved outside the discharge electrode and is arranged relative to the discharge electrode at a distance.

4. The purification device according to claim 2, wherein: The conductive body is a plate-shaped structure, the discharge electrode comprises two discharge parts, the two discharge parts are arranged opposite to each other at two ends of the width direction of the conductive body, and the plurality of discharge tips of the discharge parts are arranged along the length direction of the conductive body; The discharge assembly includes at least two receiving electrodes, and the receiving electrodes are arranged on both sides of the conductive body in the width direction; the two receiving electrodes are arranged relatively spaced apart from the two discharge parts of the discharge electrode, so that the two discharge parts of the discharge electrode can generate streamer discharge to produce sterilizing substances.

5. The purification device according to claim 4, wherein: The discharge assembly includes a plurality of discharge electrodes spaced apart along the width direction of the conductive body, and the receiving electrode is disposed between two adjacent discharge electrodes in the width direction of the conductive body.

6. The purification device according to any one of claims 1 to 5, wherein: The distance between the discharge tip and the adjacent receiving electrode is in the range of 1 mm to 100 mm.

7. The purification device according to any one of claims 1 to 5, wherein: The discharge tip is in the shape of a sawtooth, needle or thread; The receiving electrode is a solid electrode; or The receiving electrode is a hollow electrode, and the hollow electrode includes a mesh electrode or two rod-shaped electrodes arranged at intervals; the air flow channel is provided with a plurality of ventilation holes, and at least some of the ventilation holes are arranged corresponding to the hollow electrode.

8. The purification device according to any one of claims 1 to 5, wherein: An insulating member is also provided between the discharge electrode and the receiving electrode.

9. The purification device according to any one of claims 1 to 5, wherein: The discharge electrode is a plate electrode, the receiving electrode is a plate electrode or a mesh electrode, and the discharge electrode and the receiving electrode are perpendicular to each other; or The discharge electrode is a plate electrode, and the receiving electrode includes two rod-shaped electrodes, and the two rod-shaped electrodes are separated on both sides of the discharge electrode in the thickness direction; or The discharge electrode is a plate-shaped electrode, the receiving electrode is a plate-shaped electrode, and the discharge electrode and the receiving electrode are perpendicular to each other. An insulating member is also provided between the discharge electrode and the receiving electrode.

10. The purification device according to any one of claims 1 to 5, wherein: The discharge electrode is a plate-shaped electrode, and the thickness of the discharge electrode is in the range of 0.1 mm to 30 mm; wherein: The receiving electrode is a plate-shaped electrode, and the thickness of the receiving electrode is in the range of 0.1 mm to 60 mm; or The receiving electrode is a mesh electrode, the wire diameter of the receiving electrode is in the range of 0.1 mm to 0.3 mm, and the mesh number is in the range of 30 meshes to 40 meshes; or The receiving electrode includes two rod-shaped electrodes, and the diameter of the rod-shaped electrodes is in the range of 0.1 mm to 20 mm.

11. An air treatment device, comprising the purification device according to any one of claims 1 to 10.

12. A control method for the air treatment device according to claim 11, wherein: The control method comprises: Determine the purification mode; The purification device is controlled according to the determined purification mode.

13. The control method according to claim 12, wherein: The controlling the purification device according to the determined purification mode comprises: Determining the operating voltage of the DC high voltage power supply, the voltage amplitude and the pulse interval of the pulse power supply according to the determined purification mode; According to the determined working voltage of the DC high-voltage power supply, the voltage amplitude and pulse interval of the pulse power supply, the DC high-voltage power supply and the pulse power supply are turned on, so that the power supply loads a biased pulse drive voltage to the discharge component.

14. The control method according to claim 13, wherein: The purification modes include a first purification mode, a second purification mode and a third purification mode; the maximum operating voltage of the power supply is Umax0; The step of determining the working voltage of the DC high voltage power supply, the voltage amplitude and the pulse interval of the pulse power supply according to the determined purification mode includes: Based on the determined purification mode being the first purification mode, determining that the working voltage of the DC high-voltage power supply is the first working voltage U1, the voltage amplitude of the pulse power supply is the second working voltage U2, the pulse interval time is T1, and U1=Umax0 / 2, U2=Umax0 / 2; Based on the determined purification mode being the second purification mode, determining that the working voltage of the DC high-voltage power supply is the third working voltage U3, the voltage amplitude of the pulse power supply is the fourth working voltage U4, the pulse interval time is T2, and U3<Umax0 / 2, U4≤max0-U3; Based on the determined purification mode being the third purification mode, the operating voltage of the DC high-voltage power supply is determined to be the fifth operating voltage U5, the voltage amplitude of the pulse power supply is determined to be the sixth operating voltage U6, the pulse interval time is T3, and U5>Umax0 / 2, U4≤Umax0-U5.

15. The control method according to claim 14, wherein: The step of controlling the purification device according to the determined purification mode further includes: Based on the determined purification mode being the first purification mode, controlling the power supply to shut down after operating for N1 cycles; Based on the determined purification mode being the third purification mode, the power supply is controlled to shut down after operating for N2 cycles, where N2<N1.

16. The control method according to claim 14, wherein: The maximum operating voltage of the DC high-voltage power supply is Umax1, and the maximum operating voltage of the pulse power supply is Umax2, where Umax1=Umax2=Umax0.

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