Plasma module, plasma assembly, air purification assembly and air conditioner

Abstract

The application discloses a plasma module, a plasma assembly, an air purification assembly and an air conditioner. The plasma module comprises a mounting seat, a magnet, an outer electrode and an inner electrode, an air purification channel is formed between the inner electrode and the outer electrode, when there is a potential difference between the inner electrode and the outer electrode, an electric arc is generated at the annular sharp end of the outer surface of the inner electrode. When the air flows in the air purification channel, due to the increasing trend of the radial gap of the air purification channel from the sharp end to the air outlet, the airflow generates a pull arc, the plasma module ionizes the air to generate a plurality of active free radical groups with strong oxidizing property and high-energy particles, so that the effects of degrading VOC, sterilizing and killing viruses are achieved, the magnetic field is increased by the magnet, the movement track of the charged particles is constrained, the reaction time of the charged particles and the pollutants is increased, the ionization effect and the air purification efficiency are improved. And the sliding arc discharge mode is adopted, and the temperature generated by the plasma module itself can degrade ozone.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of air purification assemblies, and particularly relates to a plasma module, a plasma assembly, an air purification assembly and an air conditioner. BACKGROUND

[0002] The existing air purification technologies mainly include HEPA nets (high-efficiency filter nets), IFD modules (strong electric fields using dielectric materials as carriers), UVC (ultraviolet sterilization), Ag+ antibacterial filter nets (silver ion antibacterial filter nets), negative ions and plasma. Among them, the HEPA net, the IFD module, the UVC, the Ag+ antibacterial filter net and the negative ion technology are mainly used to remove particulate matter or antibacterial and antiviral, cannot process VOC (volatile organic compounds), and the HEPA net and the IFD module have large wind resistance. The plasma technology can generate a large number of strong oxidizing active free radicals and high-energy particles through ionization of air, and can achieve the effects of degrading VOC and sterilizing and killing viruses.

[0003] At present, the plasma generator adopts needle electrodes or needle-plate electrodes for discharge, and has the problems of small discharge area, uneven discharge and low discharge power, thereby resulting in poor ionization effect. Moreover, the current plasma generator is prone to generate ozone. Generally, the ozone content is reduced by reducing the discharge power or adding an ozone treatment device at the tail end, but reducing the discharge power sacrifices the ionization effect, and adding the ozone treatment device increases the cost and the occupied space of the device.

[0004] In summary, the current plasma generator has the technical problems of poor ionization effect, low air purification efficiency and inability to process generated ozone. SUMMARY

[0005] To solve the technical problems of the current plasma generator, the application provides a plasma module, a plasma assembly, an air purification assembly and an air conditioner, improves the ionization effect and the air purification efficiency, and can actively degrade ozone.

[0006] One of the technical solutions adopted by the application is to provide a plasma module, which comprises:

[0007] The mounting seat is provided with an air inlet, a cavity and an air outlet which are sequentially communicated;

[0008] The magnet is connected to the mounting seat and is used for generating a magnetic field;

[0009] The outer electrode is arranged in the cavity, and the outer electrode is provided with an ionization cavity which is communicated with the air inlet and the air outlet;

[0010] An inner electrode is arranged in the ionization cavity and cooperates with the outer electrode gap to form an annular air purification channel between the inner electrode and the outer electrode, and the outer surface of the inner electrode is provided with an annular tip;

[0011] The air purification channel is located in the magnetic field, and the radial gap of the air purification channel increases from the tip to the air outlet.

[0012] According to the above technical solution, the plasma module provided by the application generates plasma by sliding arc discharge. Specifically, the inner electrode and the outer electrode with an ionization cavity are nested, and an annular air purification channel is formed between the inner electrode and the outer electrode. When one of the inner electrode and the outer electrode is grounded and the other is connected to the positive electrode (or negative electrode) of the power supply, a potential difference exists between the inner electrode and the outer electrode, and an electric arc is generated at the annular tip on the outer surface of the inner electrode. When air enters the air purification channel from the air inlet and flows to the air outlet, the radial gap of the air purification channel increases from the tip to the air outlet, so that the airflow generates a pull arc. The plasma module ionizes the air to generate a variety of active free radical groups with strong oxidizing properties and high-energy particles. The free radical groups and high-energy particles react with VOCs, microorganisms, bacteria, viruses, and other substances in the air to achieve the effects of degrading VOCs, sterilization, and virus elimination.

[0013] Therefore, the plasma module provided by the application has the following advantages:

[0014] 1. The plasma module provided by the application generates plasma by sliding arc discharge. Compared with needle electrode or needle-plate electrode discharge, the plasma module provided by the application has a large discharge area, uniform discharge, and high discharge power. The energy of high-energy particles can reach 10-20 EV (electron volts), so the ionization effect and air purification efficiency can be improved.

[0015] 2. The plasma module provided by the application generates plasma by sliding arc discharge. The gas temperature is between the gas temperature of low-temperature plasma and high-temperature plasma. The temperature generated by the plasma module itself can degrade ozone, and no additional ozone treatment unit is needed.

[0016] 3. The plasma module provided by the application has a magnet inside for generating a magnetic field, and the air purification channel is located in the magnetic field, which can constrain the movement track of charged particles such as electrons and ions. After the magnetic field is added, the charged particles such as electrons and ions make a cyclotron motion around the magnetic induction line under the action of the Lorentz force, thereby prolonging the movement path and residence time of the charged particles in the discharge area, increasing the collision probability between the charged particles and gas molecules, and being able to generate more active free radicals and high-energy particles; and the reaction time of the charged particles and pollutants is increased; and the movement of the arc during the sliding arc discharge is improved, and the ionization effect and air purification efficiency are further improved.

[0017] In some embodiments, the inner electrode comprises a cone portion coaxially arranged with the outer electrode, and the vertex of the cone portion is close to the air outlet; and the tip is located at the bottom end of the cone portion.

[0018] By arranging the cone portion coaxially with the outer electrode, the radial gap of the air purification channel linearly increases from the tip to the air outlet, the arc drawing effect is improved, and the ionization effect and air purification efficiency are further improved.

[0019] In some embodiments, the inner electrode further comprises a wind guide portion connected with the cone portion, and the tip is located at the connection between the wind guide portion and the cone portion; and the radial gap between the wind guide portion and the outer electrode is greater than the radial gap between the tip and the outer electrode.

[0020] By arranging the wind guide portion, the gap between the inner electrode and the outer electrode forms a minimum gap at the tip, and the discharge position is ensured to be accurate.

[0021] In some embodiments, the air inlet and the air outlet are oppositely arranged along the axial direction of the air purification channel; and along the direction from the air inlet to the air outlet, the radial gap between the wind guide portion and the outer electrode shows a decreasing trend.

[0022] By oppositely arranging the air inlet and the air outlet along the axial direction of the air purification channel, the air resistance of the plasma module can be reduced; and the wind guide portion is close to the air inlet, and the radial gap between the wind guide portion and the outer electrode shows a decreasing trend along the airflow direction, so that the wind guide portion can guide the airflow at the air inlet to the tip, improve the arc drawing effect, and further improve the ionization effect and air purification efficiency.

[0023] In some embodiments, the wind guide portion is in the shape of a truncated cone, and the small-diameter end of the wind guide portion is provided with a mounting portion connected with the mounting seat.

[0024] By arranging the wind guide portion in the shape of a truncated cone, the wind guide surface of the wind guide portion is a conical surface, the air resistance is reduced, and the air convection heat dissipation effect of the inner electrode and the outer electrode is improved; and the mounting portion facilitates the mounting of the inner electrode.

[0025] In some embodiments, the radial gap between the tip and the outer electrode is 2-5mm.

[0026] By setting the minimum discharge gap to 2-5mm, on the one hand, it avoids the gap being too large, which requires a large voltage to generate an arc, and on the other hand, it avoids the gap being too small, which causes too much resistance when the gas flows through.

[0027] In some embodiments, the magnet and the outer electrode are both cylindrical, and the magnet is sleeved outside the outer electrode; and / or, the magnet is provided with at least two magnets, and the at least two magnets are oppositely arranged.

[0028] In some embodiments, the mounting seat comprises:

[0029] a first cover plate, provided with the air inlet;

[0030] a second cover plate, provided with the air outlet;

[0031] a connecting portion, connected to the first cover plate and the second cover plate at both ends; the connecting portion, the first cover plate and the second cover plate enclose the cavity; or the magnet is cylindrical, and the magnet, the first cover plate and the second cover plate enclose the cavity.

[0032] By setting the mounting seat as a structure in which the first cover plate and the second cover plate are connected by the connecting portion, the mounting seat can be disassembled, and the installation and disassembly of the inner electrode, the outer electrode and the magnet are facilitated.

[0033] In some embodiments, the first cover plate and / or the second cover plate is provided with a limiting portion; the magnet is cylindrical and sleeved outside the outer electrode, and the limiting portion is located between the magnet and the outer electrode.

[0034] By setting the limiting portion, a gap is generated between the magnet and the outer electrode, the heat dissipation effect of the outer electrode is improved, and the installation and positioning of the magnet and the outer electrode are facilitated.

[0035] In some embodiments, the number of the inner electrodes and the outer electrodes is the same, and both are two or more, the inner electrodes and the outer electrodes form electrode assemblies, and the two or more electrode assemblies are arranged in an array.

[0036] The two or more electrode assemblies are all located in the magnetic field of the same magnet; or the number of the magnets is the same as the number of the electrode assemblies and corresponds one-to-one.

[0037] By arranging the plurality of electrode assemblies in an array, the internal structure of the plasma module is more compact and smaller in volume; by arranging the plurality of inner electrodes and outer electrodes to share one magnet, the volume of the plasma assembly is further reduced.

[0038] In some embodiments, the inner electrode and / or the outer electrode has a cooling cavity for communicating with a cooling unit or accommodating a refrigeration part of the cooling unit.

[0039] By arranging the cooling cavity inside the inner electrode and / or the outer electrode, when the cooling unit is communicated with the cooling cavity or the refrigeration part of the cooling unit is arranged in the cooling cavity, the cooling unit can cool the inner electrode and / or the outer electrode, solving the problem of high temperature of the sliding arc discharge electrode and potential safety hazards.

[0040] Another technical solution adopted by the present application is to provide a plasma assembly, comprising:

[0041] The plasma module described above, the inner electrode and / or the outer electrode of the plasma module has a hollow cooling cavity;

[0042] A cooling unit is communicated with the cooling cavity, or a refrigeration part of the cooling unit is located in the cooling cavity.

[0043] By arranging the cooling unit and communicating the cooling unit with the cooling cavity or locating the refrigeration part of the cooling unit in the cooling cavity, the cooling unit can cool the inner electrode and / or the outer electrode, solving the problem of high temperature of the sliding arc discharge electrode and potential safety hazards.

[0044] In some embodiments, the cooling unit comprises an inlet pipe, an outlet pipe, a container for storing cooling medium, and a driving device for driving the circulation of the cooling medium; the number of the inlet pipe and the outlet pipe is the same as the number of the inner electrode and / or the outer electrode of the plasma module, and the inlet pipe and the outlet pipe are communicated with the corresponding inner electrode and / or outer electrode.

[0045] In some embodiments, the outlet pipe extends into the cooling cavity, and the pipe opening of the outlet pipe is close to the highest point of the cooling cavity.

[0046] By arranging the outlet pipe to extend into the cooling cavity and the pipe opening to be located at a higher position, when the cooling medium in the cooling cavity rises to the pipe opening, it can enter the outlet pipe through the pipe opening, forming a circulation. Using the overflow method can increase the residence time of the cooling medium in the cooling cavity and improve the cooling effect.

[0047] In some embodiments, the volume of the container is configured to cool the inner electrode and / or the outer electrode of the at least one plasma module to 80-120 DEG C.

[0048] By setting the cooling temperature of the inner electrode and / or the outer electrode to 80-120 DEG C, on the one hand, the temperature is not too low to degrade ozone, and on the other hand, the temperature is not too high to reduce the service life of the environmental elements.

[0049] Yet another technical solution adopted by the present application is to provide an air purification assembly, comprising:

[0050] The fan module has an air duct.

[0051] The above-mentioned plasma module or the above-mentioned plasma assembly, the plasma module is arranged in the air duct, and the air inlet and the air outlet of the plasma module are in communication with the air duct.

[0052] From the above technical solution, it can be seen that the air purification assembly provided by the present application has the advantages of high density of active free radicals and high-energy particles, long reaction time of active free radicals and high-energy particles with pollutants, effective degradation of VOC, sterilization and virus killing, high ionization effect and air purification efficiency due to the arrangement of the above-mentioned plasma module or plasma assembly.

[0053] Yet another technical solution adopted by the present application is to provide an air conditioner, comprising: the above-mentioned plasma module, or the above-mentioned plasma assembly, or the above-mentioned air purification assembly.

[0054] From the above technical solution, it can be seen that the air conditioner provided by the present application has the advantages of high density of active free radicals and high-energy particles, long reaction time of active free radicals and high-energy particles with pollutants, effective degradation of VOC, sterilization and virus killing, high ionization effect and air purification efficiency due to the arrangement of the above-mentioned plasma module, plasma assembly or air purification assembly. BRIEF DESCRIPTION OF DRAWINGS

[0055] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0056] Figure 1 The structure of the plasma module in the embodiment of the present application is shown.

[0057] Figure 2 The exploded structure of the plasma module in the embodiment of the present application is shown.

[0058] Figure 3 A full cross-sectional view of the plasma module is shown. Figure 1

[0059] Figure 4 A full cross-sectional view of the plasma module is shown.

[0060] Figure 5 A full cross-sectional view of the plasma module is shown.

[0061] Figure 6 A full cross-sectional view of the plasma module is shown.

[0062] Figure 7 A full cross-sectional view of the plasma module is shown. Figure 6

[0063] Figure 8 A full cross-sectional view of the plasma module is shown.

[0064] Figure 9 A full cross-sectional view of the plasma module is shown. Figure 8

[0065] Figure 10 A full cross-sectional view of the plasma module is shown.

[0066] BRIEF DESCRIPTION OF DRAWINGS

[0067] 100 - plasma module; 110 - mounting base, 111 - air inlet, 112 - cavity, 113 - air outlet, 114 - first cover plate, 115 - second cover plate, 116 - connecting portion, 117 - limiting portion, 118 - bracket; 120 - inner electrode, 121 - tip, 122 - conical portion, 123 - air guide portion, 124 - mounting portion, 125 - cooling cavity; 130 - outer electrode, 131 - ionization cavity; 140 - magnet; 150 - air purification channel.

[0068] 200 - plasma assembly; 210 - cooling unit, 211 - inlet pipe, 212 - outlet pipe, 2121 - pipe opening, 213 - container, 2131 - filling opening, 214 - driving device.

[0069] 1000 - air purification assembly; 300 - fan module, 301 - air duct, 302 - air inlet, 303 - air outlet; 310 - air shell, 320 - air blade. DETAILED DESCRIPTION

[0070] ​​​The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0071] In addition, reference numbers and / or reference letters can be repeated in different examples in the present application, and such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or arrangements being discussed. In addition, the present application provides examples of various specific processes and materials, but a person of ordinary skill in the art can realize the application of other processes and / or the use of other materials.

[0072] In the related art, the plasma generator adopts needle electrodes or needle-plate electrodes for discharge, and has the problems of small discharge area, uneven discharge, low discharge power, and thus poor ionization effect, and easy generation of ozone. It is difficult to improve the ionization effect and reduce the ozone content. The embodiments of the present application provide a plasma module, a plasma assembly, an air purification assembly and an air conditioner, which can at least solve the above technical problems to some extent. The present application will be described below in conjunction with the drawings and specific embodiments:

[0073] Embodiment 1:

[0074] The embodiments of the present application provide a plasma module 100, please refer to Figures 1 to 3 , which is a whole structure diagram, an exploded view and a sectional view of the plasma module 100. The plasma module 100 includes a mounting seat 110, and an inner electrode 120, an outer electrode 130 and a magnet 140 mounted on the mounting seat 110. The mounting seat 110 is provided with a cavity 112 for accommodating the inner electrode 120 and the outer electrode 130. In addition, the mounting seat 110 is also provided with an air inlet 111 and an air outlet 113, both of which are in communication with the cavity 112. The air to be purified enters the cavity 112 from the air inlet 111 and is blown out of the cavity 112 from the air outlet 113. The outer electrode 130 is mounted in the cavity 112, and the outer electrode 130 is a hollow structure, and an ionization cavity 131 in communication with the air inlet 111 and the air outlet 113 is arranged inside. The inner electrode 120 is assembled in the ionization cavity 131 of the outer electrode 130 in a spaced manner, so that an annular air purification channel 150 is formed between the inner electrode 120 and the outer electrode 130. The inner electrode 120 and the outer electrode 130 generate plasma through sliding arc discharge in the air purification channel 150.

[0075] Specifically, when one of the inner electrode 120 and the outer electrode 130 is grounded and the other is connected to a positive (or negative) electrode of a power supply, a potential difference exists between the inner electrode 120 and the outer electrode 130, and an arc is generated at the annular tip 121 on the outer surface of the inner electrode 120. When air enters the air inlet 111 and flows to the air outlet 113 in the air purification channel 150, because the radial gap of the air purification channel 150 from the tip 121 to the air outlet 113 tends to increase, the airflow generates a pull arc, and the plasma module 100 ionizes the air to generate a plurality of active free radicals and high-energy particles with strong oxidizing properties, which react with VOCs, microorganisms, bacteria, viruses, and the like in the air to achieve the effects of degrading VOCs, sterilization, and virus elimination.

[0076] And, referring to Figure 2 and Figure 3 The plasma module 100 provided by the embodiments of the present application is internally provided with a magnet 140 for generating a magnetic field, and the air purification channel 150 is located in the magnetic field, which can constrain the movement trajectories of charged particles such as electrons and ions. After the magnetic field is added, the charged particles such as electrons and ions make cyclotron motion around the magnetic induction lines under the action of the Lorentz force, thereby prolonging the movement path and residence time of the charged particles in the discharge area, increasing the collision probability between the charged particles and gas molecules, and being able to generate more active free radicals and high-energy particles; and increasing the reaction time of the charged particles with pollutants; at the same time, the movement of the arc during sliding arc discharge is improved, and the ionization effect and air purification efficiency are further improved.

[0077] The magnet can be a permanent magnet or an electromagnet (such as an energized solenoid), and the present application does not make any limitation, and the specific shape of the magnet and the relative position relationship with the inner electrode 120 and the outer electrode 130 are also not limited by the present application, as long as the air purification channel 150 is located in the magnetic field region. In some embodiments, in order to facilitate assembly, the magnet 140 and the outer electrode 130 are both in the shape of a cylinder, the magnet 140 is sleeved on the outside of the outer electrode 130, and is coaxially arranged, which can ensure that the magnetic field generated by the magnet has a relatively uniform effect on the plasma. In other embodiments, a plurality of magnets 140 can be arranged, and the plurality of magnets 140 are arranged in opposite directions in the axial and / or radial directions of the air purification channel 150, for example, two magnets 140 are arranged close to the air inlet 111 and the air outlet 113 respectively, or the two magnets 140 are distributed in the radial direction, or a cylindrical magnet 140 and an axially opposite magnet 140 are arranged at the same time, and other arrangement forms of the magnet 140 are not exhaustively listed here.

[0078] The plasma module 100 provided by the embodiments of the present application generates plasma through sliding arc discharge, and the tip 121 on the outer surface of the inner electrode 120 is the discharge position. Since the air purification channel 150 is annular, the tip 121 is also annular and has the same shape as the air purification channel 150, so as to ensure a uniform discharge gap. For example, the air purification channel 150 is circular, and the tip 121 is also circular; or the air purification channel 150 is elliptical, and the tip 121 is also elliptical. The tip 121 can be a conductor arranged on the outer surface of the inner electrode 120, or a naturally formed tip 121 from the shape of the outer surface of the inner electrode 120, and the specific structure is not limited in the present application.

[0079] The region from the tip 121 to the air outlet 113 in the air purification channel 150 is an ionization region, and the ionization region should be located in the magnetic field of the magnet 140 as much as possible. The radial gap of the ionization region increases from the tip 121 to the air outlet 113, which can be linear, gradient, or variable slope, and the present application is not limited. In some embodiments, the radial gap between the tip 121 and the outer electrode 130 is 2-5 mm. By setting the minimum discharge gap a to be 2-5 mm, on the one hand, the gap is not too large, and the voltage required for arc generation is large, and the starting arc voltage of the minimum discharge gap of 2-5 mm is about 6000-20000 KV; on the other hand, the gap is not too small, and the resistance of the airflow is too large. The axial length of the inner electrode 120 and the outer electrode 130 is determined according to the installation space, and the longer the axial length, the higher the gas treatment efficiency.

[0080] In some embodiments, the inner electrode 120 includes a conical portion 122, the apex of the conical portion 122 is close to the air outlet 113, the tip 121 is located at the bottom end of the conical portion 122, and the conical portion 122 is coaxially arranged with the outer electrode 130 to ensure the uniformity of the radial gap of the air purification channel 150. The outer surface of the conical portion 122 is a conical surface, and along the direction of gas flow, the radial gap of the air purification channel 150 increases linearly in the region from the tip 121 to the air outlet 113, which improves the arc drawing effect and further improves the ionization effect and air purification efficiency.

[0081] Please refer to Figure 2 and Figure 3 In some embodiments, the inner electrode 120 further includes a wind guide portion 123, the wind guide portion 123 is close to the air inlet 111 and connected with the conical portion 122, and the tip 121 is located at the connection between the wind guide portion 123 and the conical portion 122. The radial gap between the wind guide portion 123 and the outer electrode 130 is larger than the radial gap between the tip 121 and the outer electrode 130, that is, the tip 121 is closer to the outer electrode 130 than the main body of the inner electrode 120, and the gap between the inner electrode 120 and the outer electrode 130 forms a minimum gap at the tip 121, so as to ensure the accuracy of the discharge position.

[0082] Please see Figure 1 In some embodiments, the air inlet 111 and air outlet 113 of the mounting base 110 are arranged opposite each other along the axial direction of the air purification channel 150, and the airflow path from the air inlet 111 to the air outlet 113 is a straight path, which can reduce the wind resistance of the plasma module 100. In some embodiments, the air guide 123 is close to the air inlet 111, and the radial gap between the air guide 123 and the external electrode 130 tends to decrease along the airflow direction. The air guide 123 can guide the airflow at the air inlet 111 to the tip 121, improve the arcing effect, and thus improve the ionization effect and air purification efficiency.

[0083] Specifically, in some embodiments, the air guide 123 is frustoconical, making its air guide surface conical. After the gas enters the air purification channel 150, it first blows onto the air guide 123. The smooth conical surface can reduce wind resistance and improve the air convection heat dissipation effect of the inner electrode 120 and the outer electrode 130. Since both the air guide 123 and the conical part 122 of the inner electrode 120 are conical and connected at the large diameter end / bottom end, the transition between the air guide 123 and the cone naturally forms an outwardly arched tip 121.

[0084] In the plasma module 100 provided in this application embodiment, the inner electrode 120 can be directly connected to the mounting base 110, or limited by the mounting base 110 or the inner electrode 120. In some embodiments, the small-diameter end of the air guide 123 is provided with a mounting part 124 connected to the mounting base 110, which facilitates the installation and fixation of the inner electrode 120. The outer electrode 130 can also be directly connected to the mounting base 110, or limited by the mounting base 110. The outer electrode 130 can be a cylindrical body, or a hollow component of other shapes, such as a prism with a circular cavity. The specific structure of the outer electrode 130 is not limited in this application.

[0085] In some embodiments, the mounting base 110 is a detachable structure, specifically including a first cover plate 114, a second cover plate 115, and a connecting portion 116. The first cover plate 114 and the second cover plate 115 are arranged opposite each other along the axial direction of the air purification channel 150. The air inlet 111 is disposed on the first cover plate 114, and the air outlet 113 is disposed on the second cover plate 115. The first cover plate 114 and the second cover plate 115 are connected by the connecting portion 116. The connecting portion 116 can be a threaded connection assembly, a snap-fit ​​structure, or a sleeve with a connecting structure. Specifically, when the connecting portion 116 is a sleeve, the connecting portion 116, the first cover plate 114, and the second cover plate 115 together form a cavity 112. The connecting portion 116 and the first cover plate 114, and the connecting portion 116 and the second cover plate 115 can be connected by threaded fasteners or by bonding or welding. Please refer to [link to relevant documentation]. Figure 2 and Figure 3In other embodiments, the magnet 140 can also be provided in a cylindrical shape, and the magnet 140 is enclosed by the first cover plate 114 and the second cover plate 115. The first cover plate 114 and the second cover plate 115 are connected by bolts and studs to fix the magnet 140.

[0086] In some embodiments, the first cover plate 114 and / or the second cover plate 115 are provided with a limiting portion 117 in a ring shape or distributed along the circumferential direction of the ring. The magnet 140 is provided in a cylindrical shape and is sleeved on the outside of the outer electrode 130. The limiting portion 117 is located between the magnet 140 and the outer electrode 130, so that a gap is formed between the magnet 140 and the outer electrode 130, which improves the heat dissipation effect of the outer electrode 130 and facilitates the installation and positioning of the magnet 140 and the outer electrode 130. In some embodiments, a groove matching the cross section of the outer electrode 130 can be provided on the first cover plate 114 and / or the second cover plate 115 to fix and install the outer electrode 130. In some embodiments, a radial support 118 can be provided on the first cover plate 114 and / or the second cover plate 115. The support 118 is located in the air inlet 111 and / or the air outlet 113 and is used to support the inner electrode 120. The radial support 118 will not affect the airflow. Specifically, the support 118 is connected with the mounting portion 124 of the inner electrode 120. For example, the mounting portion 124 is provided in a column shape, and the support 118 has a central through hole. The mounting portion 124 is in interference fit with the central through hole. The specific connection mode of the inner electrode 120 and the mounting seat 110 is not limited in the present application.

[0087] The plasma module 100 provided by the embodiments of the present application generates plasma through sliding arc discharge. If a plastic part is installed outside, the high temperature of the motor will accelerate the aging of the plastic part and reduce its service life, which poses a safety hazard. To solve this problem, in some embodiments, the cavity wall of the inner electrode 120 and / or the outer electrode 130 is provided in a hollow structure. The inner electrode 120 and / or the cavity wall of the outer electrode 130 is provided with a cooling cavity 125. When the cooling unit 210 is in communication with the cooling cavity 125 or the refrigeration part of the cooling unit 210 is arranged in the cooling cavity 125, the cooling unit 210 can cool the inner electrode 120 and / or the outer electrode 130 to ensure electrical safety.

[0088] In some embodiments, according to the air purification needs, a plurality of groups of electrode assemblies (including the inner electrode 120 and the outer electrode 130) can be arranged in the plasma module 100. The plurality of groups of electrode assemblies are arranged in an array, so that the internal structure is compact, which is conducive to the miniaturization of the equipment. Each group of electrode assemblies can be provided with a corresponding magnet 140, or a plurality of groups of electrode assemblies can share one magnet 140, such as Figure 4The air purification channel 150 of the electrode assembly is located in the magnetic field region of the magnet 140, i.e., the form of the magnet 140 corresponding to the formation of the magnetic field is not limited.

[0089] Therefore, the plasma module 100 provided by the embodiments of the present application has the following advantages:

[0090] 1. The plasma module 100 provided by the present application adopts sliding arc discharge to generate plasma. Compared with needle electrode or needle-plate electrode discharge, the plasma module 100 provided by the present application has a large discharge area, uniform discharge, high discharge power, and the energy of high-energy particles can reach 10-20 EV (electron volts), so that the ionization effect and air purification efficiency can be improved.

[0091] 2. The plasma module 100 provided by the present application adopts sliding arc discharge to generate plasma, and the gas temperature is between the gas temperature of low-temperature plasma and high-temperature plasma. The temperature generated by the plasma module 100 itself can degrade ozone, without the need to increase an additional ozone treatment unit.

[0092] 3. The plasma module 100 provided by the present application increases the motion trajectory of charged particles such as electrons and ions in the magnetic field, prolongs their motion path and residence time in the discharge area, increases the collision probability with gas molecules, generates more active free radicals and high-energy particles, increases the reaction time with pollutants, and improves the motion of the arc during sliding arc discharge.

[0093] 4. The plasma module 100 provided by the present application is provided with a cooling cavity 125 in the inner electrode 120 and / or the cavity wall of the outer electrode 130, which can cool the inner electrode 120 and / or the outer electrode 130 by means of an external cooling unit 210, reduce the electrode temperature, and ensure electrical safety.

[0094] Embodiment 2:

[0095] Based on the same inventive concept, the embodiments of the present application provide a plasma assembly 200, please refer to Figure 5 and Figure 6The plasma assembly 200 comprises a cooling unit 210 and a plasma module 100, which is specifically the plasma module 100 of the above-mentioned embodiment 1. For details, please refer to the embodiment, which will not be described here. In the plasma module 100 of the above-mentioned embodiment 1, the inner electrode 120 and / or the outer electrode 130 has a hollow cooling cavity 125, which is specifically the inner cavity of the inner electrode 120 and / or the cavity in the cavity wall of the outer electrode 130. The cooling unit 210 is in communication with the cooling cavity 125 to enable the cooling medium to circulate and flow to cool the electrode; or the refrigeration part of the cooling unit 210 is located in the cooling cavity 125 to generate cold energy through the refrigeration part to cool the electrode through natural convection of air. Thus, the problem of high temperature of the sliding arc discharge electrode and the potential safety hazard are solved.

[0096] In actual use, according to the air purification needs, one or more groups of electrode assemblies (including the inner electrode 120 and the outer electrode 130) can be arranged in the plasma module 100. Figure 5 The plasma assembly 200 shown comprises a plasma module 100 and a cooling unit 210. Figure 6 The plasma assembly 200 shown comprises a plasma module 100 and a cooling unit 210. Figure 6 The two or more plasma modules 100 are arranged in an array so that the internal structure is compact, which is conducive to miniaturization of the equipment. In each of the two or more plasma modules 100, a corresponding magnet 140 can be arranged; or the magnets 140 in the multiple plasma modules 100 can be integrated, such as Figure 7 As shown, each group of electrode assemblies shares one magnet 140, which further reduces the volume of the plasma assembly 200. In summary, the air purification channel 150 of the electrode assembly can be located in the magnetic field region of the magnet 140, and the form of the magnet 140 corresponding to the formation of the magnetic field is not limited.

[0097] In some embodiments, the cooling unit 210 cools the electrode by circulating and flowing cooling medium, which is not limited to water, oil or other refrigerants. Please refer to Figure 5 Figure 6 ​The cooling unit 210 comprises an inlet pipe 211, an outlet pipe 212, a container 213 and a driving device 214, which are connected by circulation pipes. The number of the inlet pipe 211 and the outlet pipe 212 is the same as the number of the plasma module 100, and each of the inlet pipe 211 and the outlet pipe 212 is connected to the corresponding inner electrode 120 and / or outer electrode 130. The container 213 is used to store the cooling medium, such as a kettle, a water tank or the like. The driving device 214 is used to drive the circulation of the cooling medium, such as a pump. The driving device 214 is installed on the outside of the bottom of the container 213, so as to ensure that the cooling medium maintains the circulation. The top of the container 213 is provided with a filling opening 2131, which is used to supplement the cooling medium or discharge the cooling medium during maintenance.

[0098] In some embodiments, the outlet pipe 212 adopts overflow outflow. Specifically referring to Figure 7 The outlet pipe 212 extends into the cooling cavity 125, and the pipe opening 2121 of the outlet pipe 212 is close to the highest point of the cooling cavity 125. When the liquid level of the cooling medium in the cooling cavity 125 rises to the pipe opening 2121, the cooling medium can enter the outlet pipe 212 through the pipe opening 2121 to form circulation. The overflow outflow can increase the residence time of the cooling medium in the cooling cavity 125, so as to ensure that there is enough cooling medium in the inner electrode 120 and / or the outer electrode 130, and improve the cooling effect.

[0099] The cooling temperature of the inner electrode 120 and / or the outer electrode 130 is determined by the volume of the container 213, the circulation flow rate of the cooling medium, the flow rate, the specific heat capacity of the cooling medium and the like. The volume of the container 213 is the main factor. In general, the volume of the container 213 should be greater than 250 mL. In some embodiments, the volume of the container 213 is set to cool the inner electrode 120 and / or the outer electrode 130 of each plasma module 100 to 80-120°C. On the one hand, this can avoid too low temperature to degrade ozone. On the other hand, this can avoid too high temperature to reduce the service life of the environmental element.

[0100] In operation, the driving device 214 in the cooling unit 210 extracts the cooling medium in the container 213, and the cooling medium enters the cooling cavity 125 of the inner electrode 120 from the water inlet of the inner electrode 120. After the cooling cavity 125 is filled with the cooling medium, the cooling medium overflows from the outlet pipe 212 back to the container 213 to circulate and dissipate heat for the inner electrode 120. Assuming that the power of the plasma module 100 is 150 W, all the power is used to heat the electrode, and only the water cooling heat dissipation is considered (without considering the natural air convection heat exchange and forced convection heat exchange), after the plasma module 100 is turned on for 20 min, the temperature of the inner electrode 120 is maintained at 100°C, and the temperature of the water is maintained at 90°C. Therefore, the cooling medium needs about 600 mL, and the volume of the container 213 should be greater than 600 mL.

[0101] Embodiment 3:

[0102] Based on the same inventive concept, the air purification assembly 1000 provided by the embodiment of the present application comprises the fan module 300 and the plasma module 100 of Embodiment 1; or the air purification assembly 1000 comprises the fan module 300 and the plasma assembly 200 of Embodiment 2. The fan module 300 has an air duct 301 inside, the plasma module 100 is arranged in the air duct 301, and the air inlet 111 and the air outlet 113 of the plasma module 100 are both in communication with the air duct 301. Figures 8 to 10

[0103] The fan module 300 is the inherent structure of the air purification assembly 1000, and the present application does not improve the related structure of the fan module 300, so the specific content can be referred to the related disclosure of the prior art, which is not limited by the present application. Figure 9 In some embodiments, the fan module 300 comprises a fan shell 310, a fan blade 320 and a motor (not shown in the figure), the fan shell 310 has an air inlet 302, an air duct 301 and an air outlet 303 which are sequentially communicated, the fan blade 320 and the motor are both mounted on the fan shell 310, the fan blade 320 is specifically located inside the air duct 301 and close to the air outlet 303, and the plasma module 100 is specifically located inside the air duct 301 and close to the air inlet 302. When the air purification assembly 1000 further comprises the cooling unit 210, the cooling unit 210 is mounted on the fan shell 310 and located outside the fan shell 310, and the other unexplained structures of the fan module 300 can be referred to the related disclosure of the prior art, which is not limited by the present application.

[0104] When air purification is needed, the plasma module 100 is turned on; the fan module 300 introduces the airflow from the air inlet 302 of the fan module 300 into the air duct 301, and the airflow enters the plasma module 100 through the air inlet 111. The plasma module 100 ionizes the air to generate a plurality of active free radicals and high-energy particles with strong oxidizing properties, and the free radicals and high-energy particles react with VOC, microorganisms, bacteria, viruses and the like in the air to achieve the effect of degrading VOC and killing bacteria and viruses. The purified air is blown out of the plasma module 100 through the air outlet 113 and discharged to the indoor environment from the air outlet 303 of the fan module 300.

[0105] ​The air purification assembly 1000 can be the air purification assembly in the air purifier, or the air purification assembly inside the air conditioner, or a separate air purification device, which is not limited in the application. The air purification assembly 1000 has the advantages of high density of active free radicals and high-energy particles, long reaction time of active free radicals and high-energy particles with pollutants, effective degradation of VOC, sterilization and virus killing, high ionization effect and air purification efficiency due to the arrangement of the above-mentioned plasma module 100 or plasma assembly 200.

[0106] Embodiment 4:

[0107] Based on the same inventive concept, the embodiment of the application provides an air conditioner, which is not limited to central air conditioners, cabinet air conditioners, wall-mounted air conditioners, etc. The air conditioner is provided with the plasma module 100 of the above-mentioned embodiment 1, or the plasma assembly 200 of the above-mentioned embodiment 2, or the air purification assembly 1000 of the above-mentioned embodiment 3. Specifically, the plasma module 100 can be assembled near the air inlet or air outlet of the air conditioner. The other structures of the air conditioner not described in detail can refer to the related disclosures of the prior art, which will not be described here.

[0108] Due to the arrangement of the above-mentioned plasma module 100, plasma assembly 200 or air purification assembly 1000, the air conditioner has the advantages of high density of active free radicals and high-energy particles, long reaction time of active free radicals and high-energy particles with pollutants, effective degradation of VOC, sterilization and virus killing, high ionization effect and air purification efficiency.

[0109] In the application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0110] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0111] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement condition and the like between the components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0112] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood broadly, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through intermediate medium; can be internal connection of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0113] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implying the number of the indicated technical features. Therefore, the features limited by "first", "second" can include one or more features explicitly or implicitly. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0114] In the description of the present application, the description of 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 application. In the present description, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present description.

[0115] In addition, the technical solutions among various embodiments can be combined with each other, but it must be based on that a person skilled in the art can realize, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0116] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, the scope of the present application is defined by the claims and their equivalents.

Claims

1. A plasma module, characterized by, The plasma module is applied to an air purification device, and comprises: a mounting base provided with an air inlet, a cavity and an air outlet which are sequentially communicated; the mounting base comprises a first cover plate, a second cover plate and a connecting portion, two ends of the connecting portion are connected to the first cover plate and the second cover plate respectively; the first cover plate is provided with the air inlet; the second cover plate is provided with the air outlet; a magnet connected to the mounting base for generating a magnetic field; an outer electrode installed in the cavity; the outer electrode is a hollow structure, and an ionization cavity which is communicated with the air inlet and the air outlet is arranged inside the outer electrode; an inner electrode arranged in the ionization cavity and gap matched with the outer electrode to form an annular air purification channel between the inner electrode and the outer electrode; an outer surface of the inner electrode is provided with a ring-shaped sharp end; the inner electrode comprises a cone portion coaxially arranged with the outer electrode, and an apex of the cone portion is close to the air outlet; the sharp end is located at a bottom end of the cone portion; wherein the air purification channel is located in the magnetic field, and a radial gap of the air purification channel shows an increasing trend from the sharp end to the air outlet; the first cover plate and / or the second cover plate is provided with a radial support located in the air inlet and / or the air outlet for supporting the inner electrode; the air inlet and the air outlet are oppositely arranged along an axial direction of the air purification channel, and a flow path of an air flow from the air inlet to the air outlet is a straight line.

2. The plasma module of claim 1, wherein: The inner electrode further comprises an air guide portion connected to the cone portion, and the sharp end is located at a connection between the air guide portion and the cone portion; a radial gap between the air guide portion and the outer electrode is greater than a radial gap between the sharp end and the outer electrode.

3. The plasma module of claim 2, wherein: The radial gap between the air guide portion and the outer electrode shows a decreasing trend along a direction from the air inlet to the air outlet.

4. The plasma module of claim 3, wherein: The air guide portion is in the shape of a frustum, and a small-diameter end of the air guide portion is provided with a mounting portion connected to the mounting base.

5. The plasma module of any of claims 1-4, wherein: The radial gap between the sharp end and the outer electrode is 2-5 mm.

6. The plasma module of any one of claims 1-4, wherein: The magnet and the outer electrode are both in the shape of a cylinder, the magnet is sleeved on an outer side of the outer electrode; and / or, the magnet is provided with at least two magnets which are oppositely arranged.

7. The plasma module of any one of claims 1-4, wherein: The connecting portion, the first cover plate and the second cover plate enclose the cavity; or the magnet is in the shape of a cylinder, and the magnet and the first cover plate and the second cover plate enclose the cavity.

8. The plasma module of claim 7, wherein: The first cover plate and / or the second cover plate is provided with a limiting portion; the magnet is in the shape of a cylinder and is sleeved on an outer side of the outer electrode, and the limiting portion is located between the magnet and the outer electrode.

9. The plasma module of any one of claims 1-4, wherein: The number of the inner electrodes and the outer electrodes is the same, and both are more than two, the inner electrodes and the outer electrodes form an electrode assembly, and the more than two electrode assemblies are arranged in an array; The more than two electrode assemblies are all located in a magnetic field of the same magnet; or the number of the magnets is the same as the number of the electrode assemblies and corresponds to the electrode assemblies one by one.

10. The plasma module of any one of claims 1-4, wherein: The inner electrode and / or the outer electrode has a cooling cavity for communicating with a cooling unit or accommodating a refrigeration part of the cooling unit.

11. A plasma assembly, comprising: The air purification device comprises: The plasma module of any one of claims 1-9, wherein the inner electrode and / or the outer electrode of the plasma module has a hollow cooling cavity; A cooling unit is in communication with the cooling cavity, or a refrigeration part of the cooling unit is located in the cooling cavity.

12. The plasma assembly of claim 11, wherein: The cooling unit comprises inlet pipes, outlet pipes, a container for storing cooling medium and a driving device for driving the circulation of the cooling medium; the number of the inlet pipes and the outlet pipes is the same as the number of the inner electrodes and / or the outer electrodes of the plasma module, and the inlet pipes and the outlet pipes are in communication with the corresponding inner electrodes and / or outer electrodes.

13. The plasma assembly of claim 12, wherein: The outlet pipes extend into the cooling cavity, and the outlet pipes have their pipe openings close to the highest point of the cooling cavity.

14. The plasma assembly of claim 12, wherein: The volume of the container is set to cool the inner electrodes and / or the outer electrodes of at least one plasma module to 80-120°C.

15. An air purification assembly, characterized by, The air purification assembly comprises: A fan module having an air duct; The plasma module of any one of claims 1-10 or the plasma assembly of any one of claims 11-14, wherein the plasma module is arranged in the air duct, and the air inlet and the air outlet of the plasma module are in communication with the air duct.

16. An air conditioner characterized by comprising: The air purification assembly comprises: The plasma module of any one of claims 1-10, or the plasma assembly of any one of claims 11-14, or the air purification assembly of claim 15.

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