An air purification device

Abstract

The utility model relates to air purification technical field, concretely is a kind of air purification device, including first electronic filter screen subassembly, the surface of first negative ion emission plate and second electronic filter screen body is provided with stable assembly mechanism, the surface of first electronic filter screen body and first support rod, second electronic filter screen body and second support rod is provided with convenient replacement mechanism, the surface of negative ion emission line and wiring port is provided with anti-folding line mechanism.The utility model not only makes air purification device when using can be used after the stable assembly between first electronic filter screen subassembly and second electronic filter screen subassembly, makes the overall stability of air purification device higher when using, makes the purification effect of air purification device to air can be guaranteed, and air purification device can be protected to the junction of negative ion emission line and wiring port, so that the service life of air purification device is longer.

Description

Technical Field

[0001] This utility model relates to the field of air purification technology, specifically to an air purification device. Background Technology

[0002] With the continuous development of industry and transportation, a large amount of harmful substances are emitted into the air, changing the normal composition of the air and deteriorating air quality. In order to improve ambient air quality, create a clean and suitable environment, and protect human health, various air purification products have appeared on the market. However, their ability to deal with air pollution is limited, the output ion concentration is very low, and the treatment space is limited. Therefore, there is a need for an air purification device.

[0003] All existing air purifiers use filters or combinations of filters to remove dust, requiring a fan to draw air into the purifier, which is inefficient. Furthermore, existing air purifiers are not sturdy enough during assembly, reducing their overall stability. Replacing the first and second electronic filters is also inconvenient, making operation difficult and compromising the purification effect. In addition, existing air purifiers typically lack anti-bend features, failing to protect the negative ion emission wires and connection points, thus shortening their lifespan. Utility Model Content

[0004] The purpose of this utility model is to provide an air purification device to solve the problems mentioned in the background art, such as the lack of stable assembly and use, the inconvenience of replacing the first and second electronic filter bodies, and the lack of anti-folding function.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an air purification device, comprising a first electronic filter assembly, the first electronic filter assembly being composed of a first negative ion emitting plate, a first electronic filter body, a first support rod, and a first gold-plated needle; a second electronic filter assembly is disposed below the first electronic filter assembly, the second electronic filter assembly being composed of a second electronic filter body, a second negative ion emitting plate, a second support rod, and a second gold-plated needle; a wiring port is installed on one side of both the first and second negative ion emitting plates, a negative ion emitting wire is installed inside the wiring port, one end of the negative ion emitting wire extends to the outside of the wiring port; a stable assembly mechanism is provided on the surface of the first negative ion emitting plate and the second electronic filter body; a convenient replacement mechanism is provided on the surface of the first electronic filter body and the first support rod, and the second electronic filter body and the second support rod; and an anti-bending mechanism is provided on the surface of the negative ion emitting wire and the wiring port.

[0006] Preferably, a first electronic filter body is disposed above the first negative ion emitting plate, and a first support rod is disposed on the surface of the top position of the first negative ion emitting plate. The surface of the first negative ion emitting plate is welded with first gold-plated needles at equal intervals. A second negative ion emitting plate is disposed below the second electronic filter body, and a second support rod is disposed on the surface of the top position of the second negative ion emitting plate. The surface of the second negative ion emitting plate is welded with second gold-plated needles at equal intervals. The bottom corner positions of the first negative ion emitting plate and the second negative ion emitting plate are threadedly connected with mounting screws. The top ends of the mounting screws respectively form the first negative ion emitting plate and the second negative ion emitting plate and are respectively threadedly fastened to the surfaces of the first electronic filter body and the second support rod.

[0007] Preferably, the stabilizing assembly mechanism consists of a first anti-detachment screw sleeve, an assembly screw, a screw hole, a screw hole, and an assembly post. An assembly post is provided between the first negative ion emitting plate and the second electronic filter body. The first anti-detachment screw sleeve is installed on the surface of both the first negative ion emitting plate and the second electronic filter body. Screw holes are provided on the surfaces of both sides of the assembly post.

[0008] Preferably, the surface of the first anti-detachment sleeve is threaded with an assembly screw for installing and fixing the first negative ion emission plate and the assembly column, as well as the second electronic filter body and the assembly column. One end of the assembly screw passes through the first anti-detachment sleeve, the first negative ion emission plate and the second electronic filter body in sequence and extends into the interior of the screw hole. The screw hole and the assembly screw are threaded together and fastened to each other.

[0009] Preferably, the easy replacement mechanism consists of a positioning block, a positioning slot, a bolt, and a second anti-loosening sleeve. The surfaces of the first electronic filter body and the second electronic filter body are both equipped with the second anti-loosening sleeve. The surface of the second anti-loosening sleeve is threaded with a bolt. One end of the bolt passes through the second anti-loosening sleeve, the first electronic filter body, and the second electronic filter body in sequence, and is respectively threaded to the surface of the first support rod and the second support rod.

[0010] Preferably, both the first support rod and the second support rod have positioning slots on their surfaces, and both the first electronic filter body and the second electronic filter body have positioning blocks installed on their inner walls, with the positioning blocks engaging with the surfaces of the positioning slots.

[0011] Preferably, the anti-bend mechanism consists of a silicone ring, a rubber ring, a protective inner ring, and a protective sleeve. The surface of the connector is fitted with a protective sleeve for surface protection of the negative ion emission line, and the inner wall of the protective sleeve is fitted with a silicone ring.

[0012] Preferably, a rubber ring is installed on the inner wall of the silicone ring, and a protective inner ring for surface protection of the negative ion emission line is installed on the inner wall of the rubber ring away from the silicone ring, and the inner wall of the protective inner ring is in contact with the surface of the negative ion emission line.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the air purifier not only enables the stable assembly of the first electronic filter assembly and the second electronic filter assembly during use, making the overall stability of the air purifier higher, making it easier for users to operate, and ensuring the air purification effect, but also protects the connection of the negative ion emission line and the wiring port, thus extending the service life of the air purifier.

[0014] 1. With a stable assembly mechanism, the user places the assembly column at the designated positions on the surfaces of the first negative ion emitting plate and the second electronic filter body, and then tightens the assembly screws on the surfaces of the first negative ion emitting plate and the second electronic filter body, so that one end of the assembly screw moves into the screw hole on the surface of the assembly column. Under the action of the first anti-loosening screw sleeve, the assembly screw can be prevented from accidentally loosening during use, making the assembly between the first negative ion emitting plate and the second electronic filter body more secure. This allows the first electronic filter assembly and the second electronic filter assembly to be installed and used stably, realizing the function of stable assembly of the air purifier. Thus, the air purifier can be used after the first electronic filter assembly and the second electronic filter assembly are stably assembled, making the overall stability of the air purifier higher during use.

[0015] 2. By incorporating a convenient replacement mechanism, the replaced first and second electronic filter bodies are placed on the surfaces of the first and second support rods, respectively. This allows the first and second electronic filter bodies to automatically engage with the positioning blocks in their corresponding positioning slots. The combined action of the positioning blocks and slots quickly aligns the installation positions of the first and second electronic filter bodies. Tightening the bolts, along with the cooperation of the bolts and the second anti-loosening sleeve, assembles the first and second electronic filter bodies onto the surfaces of the first and second support rods. This facilitates easy replacement of the first and second electronic filter bodies in the air purifier, making it convenient for users to operate and ensuring the air purification effect.

[0016] 3. By incorporating an anti-bending mechanism, the connection between the negative ion emission line and the wiring port is protected by a protective sleeve. The silicone ring, rubber ring, and protective inner ring work together to protect the surface of the negative ion emission line, preventing damage due to bending during use. This anti-bending function of the air purifier extends its lifespan by protecting the connection between the negative ion emission line and the wiring port. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the front cross-sectional structure of this utility model;

[0019] Figure 3 For the present utility model Figure 2 Enlarged structural diagram of the centrally stabilized assembly mechanism;

[0020] Figure 4 For the present utility model Figure 2 An enlarged structural diagram of the mechanism for easy replacement;

[0021] Figure 5 This is an enlarged structural schematic diagram of the anti-folding mechanism of this utility model.

[0022] In the diagram: 1. First electronic filter assembly; 11. First negative ion emission plate; 12. First electronic filter body; 13. First support rod; 14. First gold-plated needle; 101. Second electronic filter assembly; 1011. Second electronic filter body; 1012. Second negative ion emission plate; 1013. Second support rod; 1014. Second gold-plated needle; 102. Mounting screw; 103. Negative ion emission line; 104. Connection port; 2. Stable assembly mechanism; 21. First anti-loosening sleeve; 22. Assembly screw; 23. Screw hole; 24. Assembly column; 3. Convenient replacement mechanism; 31. Positioning block; 32. Positioning slot; 33. Bolt; 34. Second anti-loosening sleeve; 4. Anti-bending mechanism; 41. Silicone ring; 42. Rubber ring; 43. Protective inner ring; 44. Protective sleeve. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] The structure of the air purification device provided by this utility model is as follows: Figure 1 and Figure 2 As shown, the system includes a first electronic filter assembly 1, which comprises a first negative ion emitting plate 11, a first electronic filter body 12, a first support rod 13, and first gold-plated needles 14. The first electronic filter body 12 is positioned above the first negative ion emitting plate 11. First support rods 13 are provided on the surface of the top of the first negative ion emitting plate 11, and first gold-plated needles 14 at equal intervals are welded to the surface of the first negative ion emitting plate 11. A second electronic filter assembly 101 is positioned below the first electronic filter assembly 1, which comprises a second electronic filter body 1011, a second negative ion emitting plate 1012, a second support rod 1013, and second gold-plated needles 1014. The second negative ion emitting plate 1012 is positioned below the second electronic filter body 1011. The surface of the top position of the second negative ion emission plate 1012 is provided with a second support rod 1013. The surface of the second negative ion emission plate 1012 is welded with equally spaced second gold-plated needles 1014. The surfaces of the bottom corner positions of the first negative ion emission plate 11 and the second negative ion emission plate 1012 are threadedly connected with mounting screws 102. The top ends of the mounting screws 102 respectively form the first negative ion emission plate 11 and the second negative ion emission plate 1012 and are respectively threadedly fastened to the surfaces of the first electronic filter body 12 and the second support rod 1013. The surface of one side of the first negative ion emission plate 11 and the second negative ion emission plate 1012 is provided with a wiring port 104. The wiring port 104 is installed inside the wiring port 104, and one end of the negative ion emission line 103 extends to the outside of the wiring port 104.

[0025] Furthermore, such as Figure 2 and Figure 3 As shown, a stabilizing assembly mechanism 2 is provided on the surfaces of the first negative ion emitting plate 11 and the second electronic filter body 1011. The stabilizing assembly mechanism 2 consists of a first anti-detachment sleeve 21, an assembly screw 22, a screw hole 23, and an assembly post 24. An assembly post 24 is provided between the first negative ion emitting plate 11 and the second electronic filter body 1011. The first anti-detachment sleeve 21 is installed on the surface of both the first negative ion emitting plate 11 and the second electronic filter body 1011. Screw holes 23 are provided on both sides of the assembly post 24. An assembly screw 22 is threadedly connected to the surface of the first anti-detachment sleeve 21 for installing and fixing the first negative ion emitting plate 11 and the assembly post 24, as well as the second electronic filter body 1011 and the assembly post 24. One end of the assembly screw 22 passes through the first anti-detachment sleeve 21, the first negative ion emitting plate 11 and the second electronic filter body 1011 in sequence and extends into the interior of the screw hole 23. The screw hole 23 and the assembly screw 22 are threadedly fastened to each other.

[0026] In practice, the user places the assembly column 24 at designated positions on the surfaces of the first negative ion emission plate 11 and the second electronic filter body 1011, respectively, and then tightens the assembly screws 22 on the surfaces of the first negative ion emission plate 11 and the second electronic filter body 1011, respectively. This causes one end of the assembly screw 22 to move into the screw hole 23 on the surface of the assembly column 24. With the thread engagement between the assembly screw 22 and the screw hole 23, the screw hole 23 is installed on the surfaces of the first negative ion emission plate 11 and the second electronic filter body 1011. Under the action of the first anti-loosening sleeve 21, the assembly screw 22 can be prevented from accidentally loosening during use, making the assembly between the first negative ion emission plate 11 and the second electronic filter body 1011 more secure. This allows for stable installation and use of the first electronic filter assembly 1 and the second electronic filter assembly 101, thereby achieving the function of stable assembly of the air purification device.

[0027] Furthermore, such as Figure 2 and Figure 4As shown, the surfaces of the first electronic filter body 12 and the first support rod 13, and the second electronic filter body 1011 and the second support rod 1013 are provided with a convenient replacement mechanism 3. The convenient replacement mechanism 3 consists of a positioning block 31, a positioning groove 32, a bolt 33, and a second anti-loosening sleeve 34. The surfaces of the first electronic filter body 12 and the second electronic filter body 1011 are each equipped with a second anti-loosening sleeve 34. The surface of the second anti-loosening sleeve 34 is threaded with a bolt 33. One end of the bolt 33 passes through the second anti-loosening sleeve 34, the first electronic filter body 12, and the second electronic filter body 1011 in sequence, and is threadedly fastened to the surfaces of the first support rod 13 and the second support rod 1013 respectively. The surfaces of the first support rod 13 and the second support rod 1013 are each provided with a positioning groove 32. The inner walls of the first electronic filter body 12 and the second electronic filter body 1011 are each equipped with a positioning block 31. The surfaces of the positioning block 31 and the positioning groove 32 engage with each other.

[0028] In practice, the user places the replaced first electronic filter body 12 and second electronic filter body 1011 on the surfaces of the first support rod 13 and the second support rod 1013, respectively. This causes the first electronic filter body 12 and the second electronic filter body 1011 to automatically engage with the positioning block 31 inside the corresponding positioning slot 32. Under the combined action of the positioning block 31 and the positioning slot 32, the installation positions of the first electronic filter body 12 and the second electronic filter body 1011 can be quickly aligned. Then, the bolt 33 is tightened. With the cooperation of the bolt 33 and the second anti-loosening sleeve 34, the first electronic filter body 12 and the second electronic filter body 1011 are assembled onto the surfaces of the first support rod 13 and the second support rod 1013, respectively, so as to realize the function of convenient replacement of the first electronic filter body 12 and the second electronic filter body 1011 in the air purification device.

[0029] Furthermore, such as Figure 2 and Figure 5 As shown, the surfaces of the negative ion emission line 103 and the connection port 104 are provided with an anti-bending mechanism 4. The anti-bending mechanism 4 consists of a silicone ring 41, a rubber ring 42, a protective inner ring 43, and a protective sleeve 44. The surface of the connection port 104 is fitted with a protective sleeve 44 for surface protection of the negative ion emission line 103. The inner wall of the protective sleeve 44 is fitted with a silicone ring 41, and the inner wall of the silicone ring 41 is fitted with a rubber ring 42. The inner wall of the rubber ring 42 on the side away from the silicone ring 41 is fitted with a protective inner ring 43 for surface protection of the negative ion emission line 103. The inner wall of the protective inner ring 43 is in contact with the surface of the negative ion emission line 103.

[0030] During implementation, the protective sleeve 44 protects the connection between the negative ion emission line 103 and the wiring port 104. The silicone ring 41, rubber ring 42 and protective inner ring 43 work together to protect the surface of the negative ion emission line 103, making it less prone to failure or damage due to bending during use, thus achieving the function of preventing bending of the air purifier.

[0031] Working principle: In use, the first electronic filter assembly 1 is first placed in the designated position. The external negative ion generator outputs high voltage, enabling the second negative ion emitting plate 1012 to emit negative ions into the air. The concentration of negative ions can be measured at tens of millions of PCS / cubic centimeter from a distance of three meters, ensuring a high concentration of negative oxygen ions in the air. The first negative ion emitting plate 11 and the second negative ion emitting plate 1012 are connected to the external positive and negative high voltage module through the negative ion emitting line 103. Through the external positive and negative high voltage module, the second negative ion emitting plate 1012 emits negative ions onto the surface of the second electronic filter body 1011, and the first negative ion emitting plate 11 emits negative ions onto the surface of the first electronic filter body 12. This causes the particles to become negatively charged. The second electronic filter body 1011 and the first electronic filter body 12, which are under a positive high voltage electric field, adsorb the negatively charged PM2.5 or smaller particles, so that the particles are firmly adsorbed onto the second electronic filter body 1011 and the first electronic filter body 12.

[0032] Subsequently, the user places the assembly column 24 at designated positions on the surfaces of the first negative ion emission plate 11 and the second electronic filter body 1011, respectively, and then tightens the assembly screws 22 on the surfaces of the first negative ion emission plate 11 and the second electronic filter body 1011, respectively. This causes one end of the assembly screw 22 to move into the screw hole 23 on the surface of the assembly column 24. With the thread engagement between the assembly screw 22 and the screw hole 23, the screw hole 23 is installed on the surfaces of the first negative ion emission plate 11 and the second electronic filter body 1011. Under the action of the first anti-loosening sleeve 21, the assembly screw 22 can be prevented from accidentally loosening during use, making the assembly between the first negative ion emission plate 11 and the second electronic filter body 1011 more secure. This allows the first electronic filter assembly 1 and the second electronic filter assembly 101 to be stably installed and used, thus realizing the function of stable assembly of the air purifier. This ensures that the air purifier can be used after the first electronic filter assembly 1 and the second electronic filter assembly 101 are stably assembled, resulting in higher overall stability of the air purifier during use.

[0033] Subsequently, after prolonged use, the surfaces of the first electronic filter body 12 and the second electronic filter body 1011 need to be cleaned or replaced periodically. The user loosens the bolt 33 on the surface of the second anti-loosening sleeve 34, moving the bolt 33 away from the surface of the first support rod 13. After removing the bolt 33 from the surfaces of the first electronic filter body 12 and the second electronic filter body 1011, the user pulls the first electronic filter body 12 and the second electronic filter body 1011 upwards, causing the mounting screw 102 and the second electronic filter body 1011 to move the positioning block 31 away from the interior of the positioning slot 32. This allows the first electronic filter body 12 and the second electronic filter body 1011 to be removed from the surfaces of the first support rod 13 and the second support rod 1013, respectively. The surfaces of the first electronic filter body 12 and the second electronic filter body 1011 are then cleaned or replaced. The replaced first... The electronic filter body 12 and the second electronic filter body 1011 are respectively placed on the surfaces of the first support rod 13 and the second support rod 1013, so that the first electronic filter body 12 and the second electronic filter body 1011 drive the positioning block 31 to automatically engage with the corresponding positioning slot 32. Under the joint action of the positioning block 31 and the positioning slot 32, the installation positions of the first electronic filter body 12 and the second electronic filter body 1011 can be quickly aligned. Then, the bolt 33 is tightened, and with the cooperation of the bolt 33 and the second anti-loosening sleeve 34, the first electronic filter body 12 and the second electronic filter body 1011 are respectively assembled on the surfaces of the first support rod 13 and the second support rod 1013, so as to realize the function of convenient replacement of the first electronic filter body 12 and the second electronic filter body 1011 in the air purifier, thereby making it convenient for users to operate the air purifier and ensuring the purification effect of the air purifier.

[0034] Subsequently, when the user connects the second negative ion emission plate 1012 via the first negative ion emission plate 11, the connection between the negative ion emission wire 103 and the wiring port 104 is prone to kinking and damage. The protective sleeve 44 protects the connection between the negative ion emission wire 103 and the wiring port 104. The silicone ring 41, rubber ring 42, and protective inner ring 43 work together to protect the surface of the negative ion emission wire 103, preventing damage due to kinking during use. This achieves the anti-kinking function of the air purifier, thus protecting the connection between the negative ion emission wire 103 and the wiring port 104, extending the lifespan of the air purifier, and ultimately completing its operation. In this embodiment, the voltage can range from several kilovolts to 200,000 volts, with the positive high voltage being greater than the negative high voltage, and vice versa.

[0035] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention.

Claims

1. An air purification device, comprising a first electronic filter assembly (1), characterized in that: The first electronic filter assembly (1) is composed of a first negative ion emitting plate (11), a first electronic filter body (12), a first support rod (13), and a first gold-plated needle (14). A second electronic filter assembly (101) is disposed below the first electronic filter assembly (1). The second electronic filter assembly (101) is composed of a second electronic filter body (1011), a second negative ion emitting plate (1012), a second support rod (1013), and a second gold-plated needle (1014). A wiring port (1014) is installed on one side of both the first negative ion emitting plate (11) and the second negative ion emitting plate (1012). 4) A negative ion emission line (103) is installed inside the connection port (104). One end of the negative ion emission line (103) extends to the outside of the connection port (104). A stable assembly mechanism (2) is provided on the surface of the first negative ion emission plate (11) and the second electronic filter body (1011). A convenient replacement mechanism (3) is provided on the surface of the first electronic filter body (12) and the first support rod (13), and the second electronic filter body (1011) and the second support rod (1013). An anti-bending mechanism (4) is provided on the surface of the negative ion emission line (103) and the connection port (104).

2. The air purification device according to claim 1, characterized in that: A first electronic filter body (12) is disposed above the first negative ion emitting plate (11). A first support rod (13) is disposed on the surface of the top position of the first negative ion emitting plate (11). Equally spaced first gold-plated pins (14) are welded to the surface of the first negative ion emitting plate (11). A second negative ion emitting plate (1012) is disposed below the second electronic filter body (1011). A second support rod (13) is disposed on the surface of the top position of the second negative ion emitting plate (1012). 3) The surface of the second negative ion emitting plate (1012) is welded with equally spaced second gold-plated needles (1014). The surfaces of the bottom corners of the first negative ion emitting plate (11) and the second negative ion emitting plate (1012) are threaded with mounting screws (102). The top ends of the mounting screws (102) respectively form the first negative ion emitting plate (11) and the second negative ion emitting plate (1012) and are threadedly fastened to the surfaces of the first electronic filter body (12) and the second support rod (1013).

3. The air purification device according to claim 1, characterized in that: The stabilizing assembly mechanism (2) consists of a first anti-loosening sleeve (21), an assembly screw (22), a screw hole (23), a screw hole (23), and an assembly post (24). An assembly post (24) is provided between the first negative ion emitting plate (11) and the second electronic filter body (1011). The first anti-loosening sleeve (21) is installed on the surface of the first negative ion emitting plate (11) and the second electronic filter body (1011). Screw holes (23) are opened on both sides of the assembly post (24).

4. An air purification device according to claim 3, characterized in that: The first anti-loosening sleeve (21) has a threaded connection on its surface with an assembly screw (22) for installing and fixing the first negative ion emission plate (11) and the assembly column (24), as well as the second electronic filter body (1011) and the assembly column (24). One end of the assembly screw (22) passes through the first anti-loosening sleeve (21), the first negative ion emission plate (11) and the second electronic filter body (1011) in sequence and extends into the interior of the screw hole (23). The screw hole (23) and the assembly screw (22) are threaded together and fastened to each other.

5. An air purification device according to claim 1, characterized in that: The convenient replacement mechanism (3) consists of a positioning block (31), a positioning slot (32), a bolt (33), and a second anti-loosening sleeve (34). The surfaces of the first electronic filter body (12) and the second electronic filter body (1011) are both equipped with the second anti-loosening sleeve (34). The surface of the second anti-loosening sleeve (34) is threaded with a bolt (33). One end of the bolt (33) passes through the second anti-loosening sleeve (34), the first electronic filter body (12), and the second electronic filter body (1011) in sequence and is threadedly fastened to the surfaces of the first support rod (13) and the second support rod (1013) respectively.

6. An air purification device according to claim 1, characterized in that: The surfaces of the first support rod (13) and the second support rod (1013) are provided with positioning slots (32), and the inner walls of the first electronic filter body (12) and the second electronic filter body (1011) are provided with positioning blocks (31), and the surfaces of the positioning blocks (31) and the positioning slots (32) are engaged with each other.

7. An air purification device according to claim 1, characterized in that: The anti-bend mechanism (4) is composed of a silicone ring (41), a rubber ring (42), a protective inner ring (43) and a protective sleeve (44). The surface of the connector (104) is fitted with a protective sleeve (44) for protecting the surface of the negative ion emission line (103). The inner wall of the protective sleeve (44) is fitted with a silicone ring (41).

8. An air purification device according to claim 7, characterized in that: A rubber ring (42) is installed on the inner wall of the silicone ring (41). A protective inner ring (43) for protecting the surface of the negative ion emission line (103) is installed on the inner wall of the rubber ring (42) away from the silicone ring (41). The inner wall of the protective inner ring (43) is in contact with the surface of the negative ion emission line (103).

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