Protective filter, negative ion generating device and air conditioning equipment

Abstract

The utility model relates to air conditioning technical field discloses a protective filter screen, negative ion generating device and air conditioning equipment. Protective filter screen includes: filter screen support is provided with first rotation structure, filter screen main part is installed in filter screen support and is surrounded and has the hat -shaped structure with the open -ended, and forms the protective chamber in the hat -shaped structure, and first rotation structure is suitable for under the action of air current and drives the protective filter screen rotates. The utility model prevents the problem of the problem of preventing the ionization efficiency of negative ion generating device from falling, ensures the negative ion concentration and purification efficiency by filter screen main part blocking dust and impurity in air, avoids dust accumulation to negative ion emission end. By setting first rotation structure on the filter screen support of protective filter screen, the protective filter screen can be driven to rotate under the action of airflow in the air duct, greatly improving the contact opportunity of particles in air and the protective filter screen, effectively improving the dust filtering effect of the protective filter screen, ensuring the reliable and efficient work of the negative ion generator, and the air purification efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, specifically to a protective filter, a negative ion generator, and an air conditioning device. Background Technology

[0002] Currently, air purifiers with negative ion functionality are widely used to improve air quality and enhance indoor environmental health. These products generate high concentrations of negative ions through a negative ion generator, which neutralize and settle pollutants such as particulate matter, bacteria, and viruses in the air, thus achieving air purification. However, a common problem is that the concentration of negative ions decreases significantly over time, leading to a decline in product performance.

[0003] The main reason for this problem is that the carbon fiber brush of the negative ion generator, as the negative ion emitting end, easily adsorbs dust and impurities in the air during long-term operation, leading to dust accumulation and a decrease in its ionization efficiency, resulting in a rapid decline in the concentration of negative ions. Utility Model Content

[0004] In view of this, the present invention provides a protective filter, a negative ion generator, and an air conditioning device to solve the problem that the negative ion emitter of the negative ion generator is prone to adsorbing dust and impurities in the air during long-term operation, which leads to dust accumulation and a decrease in its ionization efficiency, resulting in a rapid decline in the concentration of negative ions.

[0005] In a first aspect, this utility model provides a protective filter screen, comprising: The filter support is equipped with a first rotating structure; The filter body is installed on the filter support to form a cap-shaped structure with an open end, and a protective chamber is formed inside the cap-shaped structure; the first rotating structure is adapted to drive the protective filter to rotate under the action of airflow.

[0006] Beneficial Effects: The protective filter is suitable for installation on the negative ion emitter of a negative ion generator. The filter body blocks dust and impurities in the air, preventing dust accumulation at the emitter and thus preventing a decrease in the ionization efficiency of the negative ion generator, ensuring both negative ion concentration and purification efficiency. By setting a first rotating structure on the filter support, after the filter is installed, the airflow in the duct acts on the first rotating structure, causing the filter to rotate, thereby improving the dust blocking effect. Static filters rely on airflow passively passing through the filter pores. If dust particles are small and the airflow is fast, they easily flow around the filter surface, resulting in a low interception rate. This invention uses a rotatable protective filter that actively cuts the airflow, changing its direction and forcing dust particles that might otherwise flow around to collide with the filter fibers. This significantly increases the contact opportunity between particles and the protective filter, effectively improving the dust filtration effect and ensuring the reliable and efficient operation of the negative ion generator, resulting in high air purification efficiency and a good user experience.

[0007] In one alternative implementation, the first rotating structure includes: Fins are disposed on the outer side of the filter support; A rotating part is provided on the filter support.

[0008] Beneficial effects: When airflow passes through the fins, it can act on the fins' driving force, forming a rotational torque. Under the action of this rotational torque, the protective filter rotates along its axis. Using fins as the rotating airflow action component results in a simple structure that is easy to design according to needs. The rotating part serves as the rotational support and guide for the protective filter, ensuring reliable movement of the protective filter.

[0009] In one alternative embodiment, at least a portion of the cross-section of the fin is curved.

[0010] Beneficial effects: The curved surface of the curved fins can form a wrapping force, and the curved surface can fit the direction of the driving force over a larger area. The effective force-bearing area can be significantly increased compared with straight fins. The required driving power is lower at the same speed, and rotation can be achieved with a lower airflow driving force.

[0011] In one alternative embodiment, the cross-section of the fin is curved; the inner side of the fin near the center of curvature is the windward side, and the outer side of the fin away from the center of curvature is the leeward side.

[0012] Beneficial effects: During the driving process, the connection between the fins and the filter support (root) is prone to stress cracks due to torque concentration; the entire fin is curved and arc-shaped, and the fins are transitioned by arcs, which evenly distributes stress to the entire arc surface (similar to the arc structure of an arch bridge distributing weight), significantly reducing the risk of root breakage, and is especially suitable for protective filters that rotate at high frequency for a long time.

[0013] In one alternative embodiment, the fins are disposed at the end of the filter support near the opening.

[0014] Beneficial effects: The end of the filter support closest to the opening is closest to the rotating part of the protective filter. Because it is closest to the fulcrum, the resulting lever arm (the distance from the fulcrum to the force point of the fin) is short. When the short lever arm transmits the airflow thrust, the torque loss is smaller. When the airflow acts on the fin at this position, the thrust can be directly converted into the rotational torque of the protective filter, avoiding torque dispersion caused by an excessively long lever arm. This reduces the jamming or sudden changes in rotation speed of the protective filter, making the rotation of the protective filter more stable.

[0015] In one alternative embodiment, the rotating part is located near the opening.

[0016] Beneficial effects: The rotating part is located near the opening, which facilitates manufacturing and installation; the rotating part is also easy to cooperate with its fixed structure to form a reliable limiting and guiding structure; compared with the part located in the middle or top of the filter support, the cooperation with the fixed structure is tighter, improving the limiting accuracy, thereby accurately controlling the rotation trajectory and avoiding erratic movement.

[0017] In one optional embodiment, the rotating part includes: Rotating protrusions, at least one of the rotating protrusions being circumferentially distributed along the inner or outer side of the filter support; Alternatively, an annular groove may be formed circumferentially on the inner or outer side of the filter support.

[0018] Beneficial effects: The filter holder can cooperate with the corresponding annular groove or rotating protrusion on the negative ion holder by rotating the protrusion or annular groove. This can not only limit the axial movement of the protective filter (avoiding vertical displacement of the rotating parts), but also guide the protective filter to rotate along a fixed circumferential trajectory by the fit between the protrusion and the groove, avoiding radial displacement, and making the rotation more stable and reliable.

[0019] Secondly, this utility model also provides a negative ion generating device, comprising: The negative ion emitting unit includes a negative ion holder and an ion emitting end; a second rotating structure is provided on the negative ion holder. The protective filter described in any of the above embodiments is sleeved on the negative ion support and the ion emitting end is housed in the protective chamber, and the second rotating structure is matched and connected to the first rotating structure.

[0020] Beneficial effects: A second rotating structure matching the first rotating structure is installed on the negative ion holder, ensuring a reliable connection between the protective filter and the negative ion holder. The ion emitting end of the negative ion generator is housed within the protective chamber. The protective filter prevents dust and impurities from entering the protective chamber, avoiding dust accumulation at the negative ion generating end, ensuring the concentration of generated negative ions, and ensuring the working efficiency of the negative ion generator.

[0021] In one optional embodiment, the second rotating structure includes: An annular groove is formed circumferentially on the outer or inner side of the negative ion holder; Alternatively, a rotating protrusion may be provided, at least one of which is distributed circumferentially along the outer surface of the negative ion holder.

[0022] Beneficial effects: The filter holder can cooperate with the corresponding annular groove or rotating protrusion on the negative ion holder by rotating the protrusion or annular groove. This can not only limit the axial movement of the protective filter, but also guide the protective filter to rotate along a fixed circumferential trajectory by the fit between the protrusion and the groove, avoiding radial deviation and making the rotation more stable and reliable.

[0023] In one alternative embodiment, the ion emitter is a carbon fiber brush.

[0024] Beneficial effects: The structure and material of carbon fiber brushes directly optimize the tip discharge process. At a lower operating voltage, the tip electric field strength can break through the air ionization threshold, ionizing oxygen and water molecules in the air into negative ions. With the same negative ion output, the equipment consumes less energy.

[0025] In one alternative embodiment, the protective filter is detachably mounted on the negative ion holder.

[0026] Beneficial effects: The protective filter is detachable, making it easy to replace and maintain, thus ensuring the filtration effect.

[0027] Thirdly, this utility model also provides an air conditioning device, comprising: The air duct is equipped with an installation port; In any of the above-described negative ion generating devices, the ion emitting end is disposed in the air duct through the mounting port.

[0028] Beneficial effects: The ion emitter is installed in the air duct of the air conditioning equipment through the installation port to purify the airflow; because the protective filter of this utility model is installed at the ion emitter of the negative ion generator, the possibility of dust accumulation at the ion emitter is effectively reduced, improving the air purification efficiency and effect of the air conditioning equipment, and enhancing user satisfaction.

[0029] In one alternative implementation, the air conditioning device is a fan, an air purifier, or an air conditioner.

[0030] Beneficial effects: When fans, air purifiers, or air conditioners equipped with negative ion generators use the negative ion generator of this utility model, the protective filter installed at the ion emission end of the negative ion generator can effectively reduce the possibility of dust accumulation at the ion emission end, improve the air purification efficiency and effect of fans, air purifiers, and other air conditioning equipment, and enhance user satisfaction. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is a three-dimensional structural diagram of a protective filter according to an embodiment of the present utility model; Figure 2 This is a three-dimensional structural diagram of a filter holder according to an embodiment of the present utility model; Figure 3 This is a cross-sectional view of a negative ion generating device according to an embodiment of the present invention; Figure 4 This is a three-dimensional structural diagram of a negative ion emitting part according to an embodiment of the present utility model; Figure 5 This is a three-dimensional structural diagram of a negative ion generating device according to an embodiment of the present utility model; Figure 6 This is a schematic diagram of a negative ion generator installed in an air duct according to an embodiment of the present invention; Figure 7 This is a front cross-sectional view of an air conditioning device according to an embodiment of the present utility model; Figure 8 for Figure 7 Enlarged structural diagram of section A; Figure 9 This is a three-dimensional structural diagram of the air duct of an air conditioning device according to an embodiment of the present utility model; Figure 10 This is a three-dimensional structural diagram of the air conditioning device according to an embodiment of the present utility model.

[0033] Explanation of reference numerals in the attached figures: 10. Protective filter screen; 101. Filter support; 1011. Fins; 10111. Windward side; 10112. Leeward side; 1012. Rotating protrusion; 102. Filter body; 20. Negative ion emitter; 201. Negative ion holder; 2011. Annular groove; 202. Ion emission terminal; 30. Air duct; 301. Installation port. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] In the description of this utility model, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] Air conditioning products with negative ion generators in related technologies generally suffer from a significant decrease in negative ion concentration over time, leading to performance degradation. The main reason for this problem is that the carbon fiber brush of the negative ion generator, acting as the negative ion emitter 202, easily attracts dust and impurities from the air during long-term operation. This dust accumulation reduces the ionization efficiency, causing a rapid decrease in negative ion concentration. In view of this, this utility model is proposed.

[0038] The following is combined with Figures 1 to 10 The following describes embodiments of the present invention.

[0039] According to embodiments of the present invention, on the one hand, such as Figure 1 As shown, a protective filter 10 is provided, comprising: The filter support 101 is provided with a first rotating structure; the structure of the filter support 101 is described in detail below. Figure 2 ; The filter body 102 is installed on the filter support 101 to form a cap-shaped structure with an open end, and a protective chamber is formed inside the cap-shaped structure; the first rotating structure is adapted to drive the protective filter 10 to rotate under the action of airflow.

[0040] The protective filter 10 is suitable for installation on the negative ion emitter 202 of the negative ion generator. The filter body 102 blocks dust and impurities in the air, preventing dust from accumulating on the negative ion emitter 202, thus preventing the problem of reduced ionization efficiency of the negative ion generator and ensuring negative ion concentration and purification efficiency. By setting a first rotating structure on the filter support 101 of the protective filter 10, after the protective filter 10 is installed, the airflow in the air duct 30 acts on the first rotating structure to drive the protective filter 10 to rotate, thereby improving the dust blocking effect. The dust prevention of static filters relies on the airflow passively passing through the filter pores. If dust particles are small in diameter and have a high airflow speed, they are easy to flow around the filter surface, resulting in a low interception rate. However, this utility model uses a rotatable protective filter 10 to actively cut the airflow and change the airflow direction, forcing the dust particles that might have flowed around to collide with the filter fibers, greatly increasing the contact opportunity between the particles and the protective filter 10, effectively improving the dust filtration effect of the protective filter 10, thereby ensuring the reliable and efficient operation of the negative ion generator, high air purification efficiency, and a good user experience.

[0041] In some embodiments, the first rotating structure includes: Fins 1011 are disposed on the outer side of the filter support 101; The rotating part is located on the inner side of the filter support 101.

[0042] When the airflow passes through the fin 1011, it can act on the driving force of the fin 1011 to form a rotational torque. Under the action of this rotational torque, the protective filter 10 rotates along its axis. The fin 1011 is used as the rotating airflow action component, which has a simple structure and is convenient to design according to needs. The rotating part serves as the rotational support and guide of the protective filter 10, so that the protective filter 10 can move reliably.

[0043] In some embodiments, at least a portion of the cross-section of the fin 1011 is curved.

[0044] The curved surface of the curved fin 1011 can form a wrapping force, and the curved surface can fit the direction of the driving force over a larger range. The effective force-bearing area can be significantly increased compared to the straight fin 1011 (about 30%-50%). The required driving power is lower at the same speed, and rotation can be achieved with a lower airflow driving force.

[0045] In some embodiments, the cross-section of the fin 1011 is curved; the inner side of the fin 1011 near the center of curvature is the windward side 10111, and the outer side of the fin 1011 away from the center of curvature is the leeward side 10112. See also... Figure 1 .

[0046] During the driving process, the connection part (root) between the fin 1011 and the filter support 101 is prone to stress cracks due to torque concentration; the entire fin 1011 is curved and arc-shaped, and the fin 1011 distributes the stress evenly to the entire arc-shaped surface through the arc transition (similar to the arc structure of an arch bridge distributing weight), which significantly reduces the risk of root breakage, and is especially suitable for protective filters 10 that rotate at high frequency for a long time.

[0047] In some embodiments, the fins 1011 are disposed at the end of the filter support 101 near the opening.

[0048] The end of the filter support 101 closest to the opening is closest to the rotating part of the protective filter 10. Because it is closest to the fulcrum, the resulting lever arm (the distance from the fulcrum to the force point of the fin 1011) is short. When the short lever arm transmits the airflow thrust, the torque loss is smaller. When the airflow acts on the fin 1011 at this position, the thrust can be directly converted into the rotational torque of the protective filter 10, avoiding torque dispersion caused by an excessively long lever arm, reducing the jamming or sudden speed fluctuations when the protective filter 10 rotates, and making the rotation of the protective filter 10 more stable.

[0049] In some embodiments, the rotating part is disposed near the opening.

[0050] The rotating part is located near the opening, which facilitates manufacturing and installation. The rotating part is also easy to cooperate with its fixed structure to form a reliable limiting and guiding structure. Compared with the part located in the middle or top of the filter support 101, the cooperation with the fixed structure is tighter, improving the limiting accuracy, thereby accurately controlling the rotation trajectory and avoiding movement.

[0051] According to an embodiment of the present invention, on the other hand, as... Figures 3-5 As shown, a negative ion generator is also provided, comprising: The negative ion emitting unit 20 includes a negative ion support 201 and an ion emitting end 202; a second rotating structure is provided on the negative ion support 201. A protective filter 10 is fitted onto the negative ion holder 201, and the ion emission end 202 is housed within the protective chamber. The second rotating structure is matched and connected to the first rotating structure.

[0052] A second rotating structure matching the first rotating structure is provided on the negative ion holder 201, so that the protective filter 10 is reliably connected to the negative ion holder 201. The ion emission end 202 of the negative ion generator is housed in the protective chamber. The protective filter 10 blocks dust and impurities from entering the protective chamber, preventing dust accumulation at the negative ion emission end, ensuring the concentration of generated negative ions, and ensuring the working efficiency of the negative ion generator.

[0053] In some embodiments, the rotating part includes a rotating protrusion 1012 disposed on the inner (or outer) side of the filter holder 101; the second rotating structure includes an annular groove 2011 circumferentially formed on the outer (or inner) side of the negative ion holder 201, and when the filter holder 101 rotates, the rotating protrusion 1012 is guided to rotate along the track of the annular groove 2011 within the annular groove 2011.

[0054] In other embodiments, the rotating part includes an annular groove 2011 circumferentially formed on the inner (or outer) side of the filter holder 101; the second rotating structure includes a rotating protrusion 1012 disposed on the outer (or inner) side of the negative ion holder 201. The cooperation between the rotating protrusion 1012 and the annular groove 2011 provides guidance and limitation for the rotation of the filter holder 101, ensuring that the protective filter 10 can reliably cover the negative ion holder 201 to protect the negative ion emitter 202.

[0055] In some embodiments, such as Figures 1 to 3As shown, the rotating part includes a rotating protrusion 1012, and at least two of the rotating protrusions 1012 are distributed circumferentially along the inner side surface of the filter support 101; the second rotating structure includes an annular groove 2011, which is formed circumferentially on the outer side surface of the negative ion support 201.

[0056] In other embodiments, the rotating part includes an annular groove 2011 circumferentially formed on the inner side of the filter holder 101; the second rotating structure includes a rotating protrusion 1012, at least two of the rotating protrusions 1012 being circumferentially distributed along the outer side of the negative ion holder 201.

[0057] In other embodiments, the rotating part includes a rotating protrusion 1012, at least two of the rotating protrusions 1012 being circumferentially distributed along the outer side of the filter holder 101; the second rotating structure includes an annular groove 2011, which is circumferentially formed on the inner side of the negative ion holder 201.

[0058] In other embodiments, the rotating part includes an annular groove 2011 circumferentially formed on the outer side of the filter holder 101; the second rotating structure includes a rotating protrusion 1012, at least two of the rotating protrusions 1012 being circumferentially distributed along the inner side of the negative ion holder 201.

[0059] It should be noted that the annular groove 2011 is provided on one of the negative ion holder 201 and the filter holder 101, and the rotating protrusion 1012 is provided on the other of the negative ion holder 201 and the filter holder 101, so as to achieve the concave-convex cooperation and relative sliding.

[0060] In the above embodiments, the filter support 101 can cooperate with the corresponding annular groove 2011 or rotating protrusion 1012 on the negative ion support 201 through the rotating protrusion 1012 or annular groove 2011. This can not only limit the axial movement of the protective filter 10 (avoiding vertical displacement of the rotating part), but also guide the protective filter 10 to rotate along a fixed circumferential trajectory through the fit between the protrusion and the groove, avoiding radial displacement and making the rotation more stable and reliable.

[0061] The number of rotating protrusions 1012 can be determined according to actual needs, taking into account factors such as rotational stability, structural simplification, and reduction of frictional resistance. Generally, two to three are preferable. When at least two are set, the rotating protrusions 1012 are usually arranged in a uniform manner to further improve the rotational stability of the filter support 101.

[0062] In some embodiments, the ion emitter 202 is a carbon fiber brush.

[0063] The structure and material of carbon fiber brushes directly optimize the tip discharge process. At a lower operating voltage, the tip electric field strength can break through the air ionization threshold, ionizing oxygen and water molecules in the air into negative ions. With the same negative ion output, the equipment consumes less energy.

[0064] In some embodiments, the protective filter 10 is detachably installed on the negative ion holder 201.

[0065] The protective filter 10 is detachable, making it easy to replace and maintain, so as to ensure the filtration effect.

[0066] According to an embodiment of the present invention, in another aspect, such as Figures 6 to 10 As shown, an air conditioning device is also provided, comprising: The air duct 30 has an installation port 301. A negative ion generator, wherein the ion emitting end 202 is disposed in the air duct 30 through the mounting port 301.

[0067] The ion emitter 202 passes through the mounting port 301 and is installed in the air duct 30 of the air conditioning equipment for air purification. Since the protective filter 10 of this utility model is installed on the ion emitter 202 of the negative ion generator, the possibility of dust accumulation on the ion emitter 202 is effectively reduced, the air purification efficiency and purification effect of the air conditioning equipment are improved, and user satisfaction is enhanced.

[0068] In some embodiments, the air conditioning equipment also includes a control unit, comprising a controller and a built-in timing program. When the cumulative operating time of the equipment exceeds a preset value of H hours (e.g., 200 hours), the controller will trigger a reminder signal, notifying the user to clean the protective filter 10 via indicator lights, a buzzer, or a push notification from a smart terminal. The user can then directly remove the protective filter 10 for cleaning. Alternatively, an automatic cleaning component can be set. After the air conditioning equipment has been running for a preset time, the controller can control the cleaning component to complete the intelligent cleaning.

[0069] In some embodiments, the air conditioning device is a fan, an air purifier, or an air conditioner.

[0070] Fans, air purifiers, or air conditioners equipped with negative ion generators can utilize the negative ion generator of this invention. The protective filter 10 installed on the ion emission end 202 of the negative ion generator can effectively reduce the possibility of dust accumulation at the ion emission end 202, improve the air purification efficiency and effect of air conditioning equipment such as fans, air purifiers, and air conditioners, and enhance user satisfaction.

[0071] Specifically, the fan can be a cooling fan, a heating fan, or a cooling and heating fan.

[0072] In one embodiment, the fan includes a negative ion generator and a protective filter 10. The negative ion emitter 202 consists of a carbon fiber brush and a carbon fiber support. The carbon fiber support has grooves for engaging with the filter support 101. The protective filter 10 includes a filter support 101 and a mesh material. The mesh material is fixed to the filter support 101 by secondary injection molding or bonding. Multiple protrusions are evenly distributed at the root of the inner wall of the filter support 101. Fins 1011 are provided on the outer side of the filter support 101. The fins 1011 have a windward side 10111 and a downstream side. When airflow acts on the fins 1011, the windward side 10111 experiences greater force than the downstream side.

[0073] It should be noted that in other embodiments, bearings, such as rolling bearings or sliding bearings, can also be provided on the inner wall of the filter support 101. The structure of the rotating part can be determined by comprehensively considering factors such as needs and cost in specific applications.

[0074] The fan head has an air duct 30 with an opening. The negative ion generator is fixedly installed on the air duct 30, and the negative ion emitter 202 passes through the opening, allowing the carbon fiber brush to extend into the air duct 30. The filter screen is aligned with the carbon fiber support of the negative ion emitter 202 and fitted onto it. Pressing causes a slight deformation (the plastic material has a certain elastic deformation capacity) of the rotating protrusion 1012 on the filter screen support 101, which then engages with the annular groove 2011 of the carbon fiber support, forming a stable connection. The rotating protrusion 1012 can slide circumferentially within the annular groove 2011. When the fan operates, the airflow within the air duct 30 acts on the fins 1011 of the filter screen, causing the filter screen to rotate around the negative ion emitter 202.

[0075] This invention not only effectively prevents dust from entering the carbon fiber brush area, but also allows the filter to be pulled out directly when cleaning is needed, without disassembling the entire negative ion emitter 202, making it easy to operate.

[0076] When the machine is in operation, the fan blades rotate, drawing air in from the rear of the fan head, passing through the air duct 30, and blowing it out from the front, carrying a certain amount of dust. When the negative ion function is activated, the negative ion generator produces negative ions through high-voltage ionization, which are then released into the air via the negative ion emitter 202. As air flows through the negative ion emitter 202, the protective filter 10 intercepts most of the dust, preventing it from entering the carbon fiber brush area and causing dust accumulation. Simultaneously, the protective filter 10 is self-rotating, making it difficult for dust to settle on its surface, effectively extending the filter's cleaning cycle.

[0077] This solution effectively slows down the contamination rate of the carbon fiber brush by combining physical isolation with intelligent reminders, thereby improving the stability and purification efficiency of the negative ion generator. Meanwhile, the detachable design of the protective filter 10 reduces maintenance difficulties for users, enhancing the product's practicality and market competitiveness.

[0078] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by this application.

Claims

1. A protective screen, characterized in that include: The filter support (101) is provided with a first rotating structure; The filter body (102) is installed on the filter support (101) to form a cap-shaped structure with an open end, and a protective chamber is formed inside the cap-shaped structure; the first rotating structure is adapted to drive the protective filter (10) to rotate under the action of airflow.

2. The protective screen of claim 1, wherein, The first rotating structure includes: Fins (1011) are disposed on the outer side of the filter support (101); A rotating part is provided on the filter support (101).

3. The protective screen of claim 2, wherein, At least a portion of the cross-section of the fin (1011) is curved.

4. The protective screen of claim 3, wherein, The cross-section of the fin (1011) is curved; the inner side of the fin (1011) near the center of curvature is the windward side (10111), and the outer side of the fin (1011) away from the center of curvature is the leeward side (10112).

5. The protective screen of claim 2, wherein, The fins (1011) are disposed at the end of the filter support (101) near the opening.

6. The protective filter according to any one of claims 2 to 5, characterized in that, The rotating part is located near the opening.

7. The protective screen of claim 6, wherein, The rotating part includes: Rotating protrusion (1012), at least one of the rotating protrusions (1012) is circumferentially distributed along the inner or outer side of the filter support (101); Alternatively, an annular groove (2011) may be formed circumferentially on the inner or outer side of the filter support (101).

8. A negative ion generating device, characterized by comprising: include: The negative ion emitting unit (20) includes a negative ion holder (201) and an ion emitting end (202); a second rotating structure is provided on the negative ion holder (201); The protective filter (10) according to any one of claims 1 to 7 is sleeved on the negative ion support (201) and the ion emission end (202) is housed in the protective chamber, and the second rotating structure is matched and connected to the first rotating structure.

9. The negative ion generating device according to claim 8, wherein The second rotating structure includes: An annular groove (2011) is formed circumferentially on the outer or inner side of the negative ion holder (201); Alternatively, a rotating protrusion (1012) may be used, at least one of which is circumferentially distributed along the outer or inner side of the negative ion holder (201).

10. The negative ion generating device according to claim 8, wherein The ion emitter (202) is a carbon fiber brush.

11. The negative ion generating device according to any one of claims 8 to 10, wherein, The protective filter (10) is detachably installed on the negative ion holder (201).

12. An air conditioning apparatus characterized by comprising: include: The air duct (30) is provided with an installation port (301); The negative ion generating device according to any one of claims 8 to 11, wherein the ion emitting end (202) is disposed in the air duct (30) through the mounting port (301).

13. The air conditioning apparatus according to claim 12, wherein The air conditioning equipment is a fan, an air purifier, or an air conditioner.

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