Ultraviolet sewage treatment device with self-cleaning lamp tube

Abstract

The utility model relates to sewage treatment technical field, more particularly, relate to a kind of ultraviolet sewage treatment device with self-cleaning lamp tube.The device includes box body component, processing component and cleaning component.Box body component surrounds and forms hollow containing cavity;Processing component includes photocatalyst unit and purple light unit;Photocatalyst unit and purple light unit are located in containing cavity;Photocatalyst unit and purple light unit are connected with box body component respectively;The light emitted by purple light unit is irradiated on the surface of photocatalyst unit;Cleaning component includes cleaning unit, drive unit;Cleaning unit is located in containing cavity;Drive unit is connected with box body component;Cleaning unit is connected with drive unit;Drive unit drives cleaning unit to move on the surface of purple light unit.In this way, the problem of poor sewage treatment effect is solved.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and more specifically, to an ultraviolet wastewater treatment device with a self-cleaning lamp. Background Technology

[0002] Currently, ultraviolet (UV) photocatalytic oxidation technology is used for wastewater treatment. The core of this technology lies in using UV radiation to excite photocatalyst materials. When the photon energy absorbed by the photocatalyst is equal to or greater than its bandgap, electrons on the photocatalyst are excited and transition to the conduction band, generating electrons with strong redox capabilities, thereby producing a variety of highly oxidizing substances. Ultimately, this achieves the efficient removal and harmless treatment of pollutants.

[0003] However, ultraviolet light must effectively irradiate the surface of the photocatalyst to excite and generate electrons. But the wastewater to be treated typically contains a large number of opaque impurities. During continuous operation, these impurities gradually deposit and adhere to the light-transmitting outer wall of the ultraviolet light source, forming a coating layer. This deposit shields the ultraviolet light, severely hindering its penetration and propagation, preventing the photocatalyst from obtaining sufficient photon energy to be excited. Ultimately, this results in unstable wastewater treatment performance and low efficiency. Utility Model Content

[0004] To address the problem of poor wastewater treatment efficiency, this utility model provides an ultraviolet wastewater treatment device with a self-cleaning lamp, comprising: A housing assembly that surrounds and forms a hollow receiving cavity; The processing component includes a photocatalyst unit and a violet light unit; both the photocatalyst unit and the violet light unit are located within the receiving cavity; the photocatalyst unit and the violet light unit are respectively connected to the housing assembly; the light emitted by the violet light unit illuminates the surface of the photocatalyst unit; A cleaning assembly, comprising a cleaning unit and a driving unit; the cleaning unit is located within the receiving cavity; the driving unit is connected to the housing assembly; the cleaning unit is connected to the driving unit; the driving unit drives the cleaning unit to move on the surface of the ultraviolet light unit.

[0005] In some embodiments, the ultraviolet light unit has two units; the two ultraviolet light units are arranged at intervals along the height of the housing assembly; The cleaning unit includes a support plate, a brush module, and a cleaning hole; the support plate is connected to the drive unit; the brush module is detachably connected to the support plate; the cleaning hole penetrates the support plate along its thickness direction; the ultraviolet light unit passes through the cleaning hole; the brush module is arranged circumferentially along the cleaning hole; the brush module abuts against the ultraviolet light unit; the drive unit drives the support plate to move the brush module along the axial direction of the ultraviolet light unit.

[0006] In some embodiments, the cleaning assembly further includes a guide unit; the guide unit includes a first guide portion and a second guide portion; the first guide portion and the second guide portion are respectively connected to the housing assembly; the first guide portion and the second guide portion are respectively slidably connected to the support plate; the first guide portion, the drive unit, and the second guide portion are arranged at intervals from top to bottom along the height direction of the housing assembly.

[0007] In some embodiments, the first guide portion, one of the ultraviolet light units, the driving unit, the second guide portion, and the other ultraviolet light unit are arranged sequentially from top to bottom along the height direction of the housing assembly.

[0008] In some embodiments, the distance between the first guide portion and the driving unit is greater than the distance between the second guide portion and the driving unit.

[0009] In some embodiments, the distance between one of the violet light units and the driving unit is greater than the distance between the other violet light unit and the driving unit.

[0010] In some embodiments, the minimum included angle between the brush module and the ultraviolet light unit is 15° to 55°.

[0011] In some embodiments, the housing assembly includes a housing unit and a transmission unit; the housing unit surrounds the hollow receiving cavity; the transmission unit includes an outlet pipe and an inlet pipe; the outlet pipe communicates with the receiving cavity; the inlet pipe communicates with the receiving cavity. The brush module includes a first brush and a second brush; the first brush is connected to the side of the support plate near the water inlet pipe; the second brush is connected to the water outlet pipe; the first brush and the second brush are symmetrically arranged along the support plate.

[0012] In some embodiments, the contact area between the first brush and the ultraviolet light unit is greater than the contact area between the second brush and the ultraviolet light unit.

[0013] In some embodiments, a plurality of brush modules are provided on the outer periphery of the ultraviolet light unit near the second guide portion; the plurality of brush modules are arranged at intervals along the axis of the ultraviolet light unit near the second guide portion.

[0014] To address the problem of poor wastewater treatment efficiency, this utility model has the following advantages: The housing is enclosed by a box assembly to form a hollow containment cavity. Both the photocatalytic unit and the ultraviolet (UV) light unit of the treatment component are located within the containment cavity, with the light emitted by the UV light unit illuminating the surface of the photocatalytic unit. Simultaneously, the cleaning unit of the cleaning component is located within the containment cavity and connected to the drive unit. The drive unit drives the cleaning unit to move on the surface of the UV light unit, thereby cleaning the outer surface of the UV light unit and preventing the deposition of opaque impurities in the wastewater on the surface of the UV light unit. This ensures that the light emitted by the UV light unit can fully irradiate the photocatalytic unit, ensuring that the photocatalytic unit produces a strong catalytic oxidation effect. Ultimately, this solves the problem of poor wastewater treatment effect caused by insufficient UV light irradiation of the photocatalyst due to impurity deposition. Attached Figure Description

[0015] Figure 1 A schematic diagram of the structure of an ultraviolet wastewater treatment device with a self-cleaning lamp tube is shown in one embodiment. Figure 2 It shows Figure 1 A top view of a UV wastewater treatment device with self-cleaning lamps; Figure 3 It shows Figure 2 A cross-sectional view of an ultraviolet wastewater treatment device with self-cleaning lamps; Figure 4 It shows Figure 3 Enlarged view of point A in the ultraviolet wastewater treatment device with self-cleaning lamps.

[0016] Reference numerals: Box assembly 10; Box unit 11; Transmission unit 12; Water inlet pipe 121; Water outlet pipe 122; Processing component 20; Photocatalyst unit 21; Ultraviolet light unit 22; Cleaning component 30; Cleaning unit 31; Support plate 311; Brush module 312; First brush 3121; Second brush 3122; Cleaning hole 313; Guide unit 32; First guide part 321; Second guide part 322; Drive unit 33. Detailed Implementation

[0017] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.

[0018] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0019] Currently, ultraviolet (UV) photocatalytic oxidation technology is used for wastewater treatment. The core of this technology lies in using UV radiation to excite photocatalyst materials. When the photon energy absorbed by the photocatalyst is equal to or greater than its bandgap, electrons on the photocatalyst are excited and jump to the conduction band, generating electrons with strong redox capabilities, thereby producing various highly oxidizing substances. This ultimately achieves efficient removal and harmless treatment of pollutants. However, UV light must effectively irradiate the surface of the photocatalyst to excite electrons. But the wastewater to be treated usually contains a large number of opaque impurities. During continuous operation of the wastewater treatment device, these impurities gradually deposit and adhere to the light-transmitting outer wall of the UV light source, forming a coating layer. This deposit shields the UV light, severely hindering its penetration and propagation, preventing the photocatalyst from obtaining sufficient photon energy to be excited. This ultimately results in unstable wastewater treatment effects and low efficiency.

[0020] In this embodiment, to solve the above problems, the present invention provides an ultraviolet wastewater treatment device with a self-cleaning lamp. For example... Figure 1 As shown, the ultraviolet wastewater treatment device with self-cleaning lamps includes a housing assembly 10, a treatment assembly 20, and a cleaning assembly 30.

[0021] The housing assembly 10 surrounds and forms a hollow receiving cavity, which provides installation and working space for the processing assembly 20 and the cleaning assembly 30, ensuring that the components are arranged in an orderly manner and operate in coordination.

[0022] The treatment component 20 includes a photocatalytic unit 21 and a UV light unit 22. Both the photocatalytic unit 21 and the UV light unit 22 are located within a containment cavity, ensuring their full operational function within the cavity. The photocatalytic unit 21 and the UV light unit 22 are connected to the housing component 10, ensuring a stable connection and preventing displacement within the containment cavity during wastewater treatment. This further guarantees the safety of the UV light unit 21 and the photocatalytic unit 22, preventing damage. The light emitted by the UV light unit 22 illuminates the surface of the photocatalytic unit 21, thereby activating its catalytic activity and degrading pollutants in the wastewater.

[0023] The cleaning assembly 30 includes a cleaning unit 31 and a driving unit 33. The cleaning unit 31 is located within the receiving cavity. The driving unit 33 is connected to the housing assembly 10, and the cleaning unit 31 is connected to the driving unit 33. The driving unit 33 drives the cleaning unit 31 to move on the surface of the ultraviolet light unit 22 to clean the outer surface of the ultraviolet light unit 22, preventing the deposition of impurities and ensuring the light transmittance and luminous efficiency of the ultraviolet light unit 22.

[0024] Furthermore, such as Figure 1 , Figure 3 As shown, there are two ultraviolet light units 22, which are arranged at intervals along the height of the housing assembly 10 to expand the irradiation range of ultraviolet light in the housing cavity, increase the contact area of ​​sewage, and at the same time improve the catalytic reaction efficiency of the photocatalytic unit 21, thereby enhancing the sewage treatment effect.

[0025] The cleaning unit 31 includes a support plate 311, a brush module 312, and a cleaning hole 313. The support plate 311 is connected to the drive unit 33, ensuring that the drive unit 33 can change the position of the support plate 311, i.e., drive the support plate 311. The brush module 312 is detachably connected to the support plate 311, facilitating the replacement and maintenance of the brush module 312 and avoiding the problem of damage caused by disassembling the entire support plate 311, thereby reducing equipment inspection and maintenance costs. The cleaning hole 313 penetrates the support plate 311 along its thickness direction. The ultraviolet light unit 22 passes through the cleaning hole 313. The brush module 312 is arranged circumferentially along the cleaning hole 313 and abuts against the ultraviolet light unit 22. The drive unit 33 drives the support plate 311 to move the brush module 312 along the axial direction of the ultraviolet light unit 22, so that the brush module 312 can perform a comprehensive and uniform cleaning of the surface of the ultraviolet light unit 22, effectively avoiding the deposition of impurities and ensuring that the ultraviolet light unit 22 is cleaned without dead angles.

[0026] Furthermore, such as Figure 3 As shown, the cleaning component 30 also includes a guide unit 32, which includes a first guide portion 321 and a second guide portion 322. The guide unit 32 provides precise guidance for the movement of the support plate 311, preventing the support plate 311 from shifting or shaking during the movement of the brush module 312, ensuring that the brush module 312 is always stably in contact with the ultraviolet light unit 22, and improving the cleaning effect. The first guide portion 321 and the second guide portion 322 are respectively connected to the housing component 10, and the first guide portion 321 and the second guide portion 322 are respectively slidably connected to the support plate 311. The first guide portion 321, the drive unit 33, and the second guide portion 322 are arranged sequentially and alternately from top to bottom along the height of the housing component 10, so that the force on the support plate 311 is more even and the movement process is more stable.

[0027] Furthermore, such as Figure 3 As shown, the first guide section 321, one ultraviolet light unit 22, the drive unit 33, the second guide section 322, and the other ultraviolet light unit 22 are arranged sequentially from top to bottom along the height direction of the housing assembly 10. This arrangement not only ensures the guiding function of the first and second guide sections 322 on the support plate 311, but also positions the two ultraviolet light units 22 at key positions on the moving path of the support plate 311, ensuring that the brush module 312 can thoroughly clean both ultraviolet light units 22 when it moves. At the same time, the spacing between the components reduces the transmission of vibration between them, improves the overall operational stability of the equipment, and facilitates the flow of sewage within the receiving cavity, allowing the sewage to fully contact the ultraviolet light unit 22 and the photocatalyst unit 21.

[0028] When the cleaning unit 31 cleans the ultraviolet light unit 22, impurities will fall towards the bottom of the housing assembly 10 due to gravity. These falling impurities may land on the surfaces of the first guide portion 321 and the second guide portion 322. Therefore, the first guide portion 321 and the second guide portion 322 should ideally use dovetail guides to prevent impurities from creating movement resistance on the guides after landing on their surfaces. Simultaneously, impurities in wastewater typically accumulate at the bottom of the housing cavity, resulting in more impurities deposited on the surface of the ultraviolet light unit 22 near the bottom than on the other ultraviolet light unit 22. Therefore, the first guide portion 321 is positioned above the two ultraviolet light units 22, while the second guide portion 322 is positioned above the ultraviolet light unit 22 near the bottom, minimizing the amount of impurities falling onto the surface of the second guide portion 322. Furthermore, since the photocatalyst unit 21 is located on the side of the ultraviolet light unit 22, such as... Figure 2 As shown, photocatalyst units 21 can be provided on both the upper and lower sides of the ultraviolet light unit 22. Therefore, in order to avoid the first guide portion 321 and the second guide portion 322 blocking the path of the ultraviolet light unit 22 irradiating the photocatalyst unit 21, it is preferable to pass the first guide portion 321 and the second guide portion 322 through the carrier plate 311 and connect them to the carrier plate 311, thereby ensuring the path of the ultraviolet light unit 22 irradiating the photocatalyst unit 21.

[0029] Furthermore, such as Figure 3 As shown, the distance between the first guide portion 321 and the drive unit 33 is greater than the distance between the second guide portion and the drive unit 33. Since impurities falling onto the upper surface of the second guide portion 322 may encounter resistance, this distance setting is adapted to the force characteristics of the support plate 311. It should be understood that the drive unit 33 is the power source that drives the support plate 311 to move. The second guide portion 322, which is close to the drive unit 33, can provide close-range stable guidance to the power input end of the support plate 311, while the first guide portion 321 provides auxiliary guidance to the other end of the support plate 311 through a larger distance, so that the support plate 311 can remain stable throughout the entire movement process, avoid tilting, ensure that the contact force between the brush module 312 and the ultraviolet light unit 22 is uniform, and ensure the cleanliness of the surface of the ultraviolet light unit 22.

[0030] Furthermore, such as Figure 3As shown, the distance between one violet light unit 22 and the driving unit 33 is greater than the distance between the other violet light unit 22 and the driving unit 33. This better accommodates the fact that the distance between the first guide portion 321 and the driving unit 33 is greater than the distance between the second guide portion 322 and the driving unit 33. The violet light unit 22 with a smaller distance from the driving unit 33 is the one near the bottom. This violet light unit 22 has more impurities deposited on its surface. Therefore, by setting its distance from the driving unit 33 closer, it is ensured that the surface of the violet light unit 22 can receive sufficient driving force to clean its surface.

[0031] Furthermore, such as Figure 4 As shown, the minimum angle between the brush module 312 and the UV light unit 22 ranges from 15° to 55°. This ensures effective contact between the brush module 312 and the surface of the UV light unit 22, allowing the brush module 312 to fully act on the impurity-attached surface of the UV light unit 22, while avoiding damage caused by excessive pressure from the brush on the UV light unit 22 due to an excessively small angle, or insufficient cleaning power due to an excessively large angle.

[0032] Furthermore, such as Figure 2 As shown, the housing assembly 10 includes a housing unit 11 and a transmission unit 12. The housing unit 11 surrounds and forms a hollow receiving cavity. The transmission unit 12 includes an outlet pipe 122 and an inlet pipe 121. The outlet pipe 122 communicates with the receiving cavity, and the inlet pipe 121 communicates with the receiving cavity. The arrangement of the inlet pipe 121 and the outlet pipe 122 allows sewage to enter and exit the receiving cavity in an orderly manner, forming a stable sewage treatment process and ensuring that the sewage has sufficient residence time in the receiving cavity and fully interacts with the treatment assembly 20.

[0033] The brush module 312 includes a first brush 3121 and a second brush 3122. The first brush 3121 is connected to the side of the support plate 311 near the inlet pipe 121, and the second brush 3122 is connected to the outlet pipe 122. The first brush 3121 and the second brush 3122 are symmetrically arranged along the support plate 311. Because the sewage at the inlet pipe 121 has a high level of impurities, the first brush 3121 can prioritize cleaning the UV unit 22, while the outlet pipe 122 is cleaned by the second brush 3122. The symmetrical structure makes the cleaning range more comprehensive, effectively preventing impurities from depositing on the surface of the UV unit 22 and ensuring sewage treatment efficiency. The brush module 312 can reciprocate along the UV unit 22 to ensure that the surface of the UV unit 22 is thoroughly cleaned.

[0034] Furthermore, such as Figure 4As shown, the contact area between the first brush 3121 and the ultraviolet light unit 22 is larger than that between the second brush 3122 and the ultraviolet light unit 22. Since the wastewater entering through the inlet pipe 121 carries more impurities, the contamination level on the side of the ultraviolet light unit 22 closer to the inlet pipe 121 is usually higher. The first brush 3121, with its larger contact area, provides stronger cleaning power and more thoroughly removes surface-attached impurities. Conversely, the wastewater closer to the outlet pipe 122 has fewer impurities after preliminary treatment, and the smaller contact area of ​​the second brush 3122 is sufficient to meet the cleaning requirements. This design ensures cleaning effectiveness, rationally allocates brush resources, and extends the overall service life of the brush module 312. The first brush 3121 and the second brush 3122 can be made of materials such as plastic, rubber, or metal wire, and are detachably connected to the load plate for easy replacement.

[0035] Furthermore, since pollutants in wastewater typically settle to the bottom of the receiving cavity, the surface of the UV unit 22 near the second guide section 322 is covered with more impurities. Therefore, multiple brush modules 312 are provided on the outer periphery of the UV unit 22 near the second guide section 322. These multiple brush modules 312 are arranged at intervals along the axis of the UV unit 22 near the second guide section 322. The arrangement of multiple brush modules 312 at intervals on the outer periphery of the UV unit 22 near the second guide section 322 enables multi-segment cleaning of the UV unit 22. Compared to a single brush module 312, this significantly improves the cleaning coverage and cleaning power. The interval arrangement avoids interference between the brush modules 312, ensuring that each brush module 312 can independently and efficiently perform its cleaning function, further guaranteeing the surface cleanliness of the UV unit 22 and maintaining its light performance.

[0036] In other embodiments, the drive unit 33 includes a drive part and a drive rod, the drive part being connected to the drive rod, and the drive rod driving the load plate to move along the axial direction of the ultraviolet light unit 22.

[0037] A turbulence unit can also be present at the bottom of the containment cavity. Multiple turbulence units or a single turbulence unit can be set. The turbulence unit releases airflow into the containment cavity to achieve the stirring effect on the sewage, avoid local fluctuations in the concentration of pollutants, and thus improve the treatment efficiency.

[0038] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the scope of this disclosure.

Claims

1. A UV wastewater treatment device with a self-cleaning lamp, characterized in that, The ultraviolet wastewater treatment device with self-cleaning lamps includes: A housing assembly that surrounds and forms a hollow receiving cavity; The processing component includes a photocatalyst unit and a violet light unit; both the photocatalyst unit and the violet light unit are located within the receiving cavity; the photocatalyst unit and the violet light unit are respectively connected to the housing assembly; the light emitted by the violet light unit illuminates the surface of the photocatalyst unit; A cleaning assembly, comprising a cleaning unit and a driving unit; the cleaning unit is located within the receiving cavity; the driving unit is connected to the housing assembly; the cleaning unit is connected to the driving unit; the driving unit drives the cleaning unit to move on the surface of the ultraviolet light unit.

2. The ultraviolet wastewater treatment device with a self-cleaning lamp tube according to claim 1, characterized in that, The ultraviolet light unit is two; the two ultraviolet light units are arranged at intervals along the height of the housing assembly. The cleaning unit includes a support plate, a brush module, and a cleaning hole; the support plate is connected to the drive unit; the brush module is detachably connected to the support plate; the cleaning hole penetrates the support plate along its thickness direction; the ultraviolet light unit passes through the cleaning hole; the brush module is arranged circumferentially along the cleaning hole; the brush module abuts against the ultraviolet light unit; the drive unit drives the support plate to move the brush module along the axial direction of the ultraviolet light unit.

3. The ultraviolet wastewater treatment device with a self-cleaning lamp tube according to claim 2, characterized in that, The cleaning component further includes a guide unit; the guide unit includes a first guide portion and a second guide portion; the first guide portion and the second guide portion are respectively connected to the housing component; the first guide portion and the second guide portion are respectively slidably connected to the support plate; the first guide portion, the drive unit, and the second guide portion are arranged at intervals from top to bottom along the height direction of the housing component.

4. The ultraviolet wastewater treatment device with a self-cleaning lamp tube according to claim 3, characterized in that, The first guide section, one of the ultraviolet light units, the driving unit, the second guide section, and the other ultraviolet light unit are arranged sequentially from top to bottom along the height direction of the housing assembly.

5. The ultraviolet wastewater treatment device with a self-cleaning lamp tube according to claim 4, characterized in that, The distance between the first guide portion and the driving unit is greater than the distance between the second guide portion and the driving unit.

6. The ultraviolet wastewater treatment device with a self-cleaning lamp tube according to claim 5, characterized in that, The distance between one of the violet light units and the driving unit is greater than the distance between the other violet light unit and the driving unit.

7. The ultraviolet wastewater treatment device with a self-cleaning lamp tube according to claim 2, characterized in that, The minimum included angle between the brush module and the ultraviolet light unit is 15° to 55°.

8. The ultraviolet wastewater treatment device with a self-cleaning lamp tube according to claim 7, characterized in that, The housing assembly includes a housing unit and a transmission unit; the housing unit surrounds and forms a hollow receiving cavity; the transmission unit includes a water outlet pipe and a water inlet pipe; the water outlet pipe is connected to the receiving cavity; the water inlet pipe is also connected to the receiving cavity. The brush module includes a first brush and a second brush; the first brush is connected to the side of the support plate near the water inlet pipe; the second brush is connected to the water outlet pipe; the first brush and the second brush are symmetrically arranged along the support plate.

9. A UV wastewater treatment device with a self-cleaning lamp tube according to claim 8, characterized in that, The contact area between the first brush and the ultraviolet light unit is greater than the contact area between the second brush and the ultraviolet light unit.

10. The ultraviolet wastewater treatment device with a self-cleaning lamp tube according to claim 3, characterized in that, A plurality of brush modules are provided on the outer periphery of the ultraviolet light unit near the second guide portion; the plurality of brush modules are arranged at intervals along the axis of the ultraviolet light unit near the second guide portion.

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