Ultraviolet sterilization module and water purification equipment

Abstract

The invention discloses an ultraviolet sterilization module and water purification equipment. The ultraviolet sterilization module comprises a shell, a light source plate assembly, a polytetrafluoroethylene tube, a glass tube and a heat dissipation silica gel sheet, the shell is a cavity shell which is arranged in a penetrating mode in the water flow direction. At least one light source plate assembly is arranged between the outer side of the glass tube and the inner wall of the shell. The light source plate assembly comprises an upper light source plate and a lower light source plate which are symmetrically arranged in the horizontal axial direction. The lamp beads on the upper light source plate and the lower light source plate are arranged in a staggered manner; the polyfluortetraethylene tube is sleeved on the outer wall of the glass tube, the polyfluortetraethylene tube is provided with an installation window of the light source plate assembly, the installation window can accommodate lamp beads on the light source plate assembly and interval parts between the lamp beads, and the interval parts between the lamp beads are provided with heat dissipation silica gel sheets. According to the efficient heat dissipation UVC ultraviolet sterilization module, the temperature of the lamp bead chip is reduced, and the service life of the sterilization module is prolonged. The device is suitable for the tail end of a large-flux water purifier.

Description

Technical Field

[0001] The present invention relates to the technical field of water purification and sterilization, and more specifically, to an ultraviolet sterilization module and a water purification device. Background Art

[0002] With the popular application of large-flow water purifiers, pipelines between the water outlet of the water purifier and the water purifier faucet, etc., are in a long-term humid and airtight environment. Coupled with the static areas formed by the retention of water flow, bacteria are likely to grow in the pipelines and water storage devices during long-term use, resulting in secondary pollution of the purified water and affecting the drinking water safety of consumers. Therefore, more stringent requirements are put forward for the sterilization treatment of the end water of the water purifier. To solve the problem of secondary pollution of the end water quality, the UVC sterilization module is widely used due to its advantages such as no chemical residue and high sterilization efficiency.

[0003] In the current field of sterilization and disinfection, the UVC-LED technology is gradually becoming a research and application hotspot. High-power UVC-LEDs usually refer to those with a relatively high radiation power of a single LED chip, generally ≥50 mW, and some even reach 100 mW - 200 mW or more. It shows great application potential in many scenarios, especially in the sterilization link of large-flow water purifiers. During the water treatment process, the key measurement index of the sterilization effect is the UV dose. UV dose (mJ / cm 2 ) = irradiance (μW / cm 2 ) × exposure time (s). For large-flow water purifiers with a water flow rate of more than 2 L / min, in order to achieve effective sterilization, it is necessary to increase the power of the lamp beads and other methods to ensure a dose of ≥40 mJ / cm 2 . This is because killing about 99.9% of Escherichia coli requires a dose of about 10 - 30 mJ / cm 2 . Only when reaching or exceeding this dose standard can the effective removal of harmful microorganisms in water be ensured and the safety of drinking water be guaranteed. However, in actual applications, high-power UVC-LEDs face many challenges. Among them, the heat dissipation problem is particularly prominent. The surface temperature of the lamp beads has a significant impact on its performance and lifespan. Research shows that for every 10°C increase in the surface temperature of the lamp beads, its lifespan will be shortened by 30%, and the attenuation of the optical power will also accelerate. This will not only increase the maintenance cost and replacement frequency of the equipment, but also may lead to unstable sterilization effects and unable to continuously meet the use requirements. Frequent replacement not only increases the user's usage cost, but also affects the product usage experience. Therefore, currently on the market, the UVC optical power of the sterilization module is low, the heat dissipation effect is not ideal, which affects the lifespan of the UVC lamp beads and the customer experience, and these are the technical problems that need to be solved urgently in this field.

[0004] Chinese Patent Document 1 (Application No.: 202410458103.6, Application Date: April 16, 2024) discloses a flowing water UVC sterilization assembly, component, and water purification device, including a quartz glass tube, a reflective layer, and multiple UVC-LED chips; the quartz glass tube is a flowing water channel structural member, and its two ends are the water inlet and outlet of the flowing water UVC sterilization assembly; the reflective layer is formed on the outer wall of the quartz glass tube, and multiple windows for UVC light incidence are provided on the reflective layer; the UVC-LED chips are arranged outside the quartz glass tube, and the UVC-LED chips project UVC light into the flowing water channel through the windows of the reflective layer; the UVC light irradiates the entire flowing water channel through the reflection of the reflective layer. In this solution, multiple UVC-LED chips adopt a decentralized distribution design. With a decentralized design, the power of a single UVC LED chip is relatively low, and the heat generation is relatively low, and an aluminum substrate or an aluminum heat dissipation member can be used for heat dissipation. In this solution, traditional heat dissipation using a heat dissipation material through a substrate is still adopted. In the case of high power, the heat dissipation effect is not ideal, the rise in the temperature of the lamp beads cannot be effectively controlled, and the problem of further improving heat dissipation has not been solved. Summary of the Invention

[0005] In view of this, the present invention provides an ultraviolet sterilization module to solve the problems of low UVC light power, unsatisfactory heat dissipation effect, affecting the lifespan of UVC lamp beads and the customer experience in the existing sterilization module.

[0006] In a first aspect, the present application provides an ultraviolet sterilization module, including a housing, a light source board assembly, a polytetrafluoroethylene tube, a glass tube, and a heat dissipation silica gel sheet having a long strip shape; wherein,

[0007] The housing is a cavity housing with a through hole along the water flow direction, and the light source board assembly, the polytetrafluoroethylene tube, the glass tube, and the heat dissipation silica gel sheet are all placed in the cavity of the housing;

[0008] The housing includes a first side wall and a second side wall arranged in parallel. The first side wall and the second side wall are both flat side walls. The first side wall and the second side wall are connected by a third side wall and a fourth side wall arranged in a mirror image. The third side wall and the fourth side wall are both convex arc-shaped side walls protruding towards the outside of the housing;

[0009] The first side wall and the second side wall are arranged in mirror symmetry, and a set of heat exchange fin groups are respectively provided on the first side wall and the second side wall. The heat exchange fin group includes 7 sub-fins, and the 7 sub-fins are arranged in equal-distance intervals and in parallel along the direction from the third side wall to the fourth side wall; the heat exchange fin group is located outside the housing; the sub-fin is a plate-like structure and is perpendicular to the first side wall and / or the second side wall, and the extending direction of the sub-fin is parallel to the water flow direction;

[0010] The glass tube is located on the central axis of the cavity of the housing along the water flow direction. The glass tube is a pipe fitting with a flowing water channel. Along the water flow direction, the two ends of the glass tube are respectively a water inlet end and a water outlet end;

[0011] At least one light source plate assembly is provided between the outer side of the glass tube and the inner wall of the housing. The light source plate assembly includes an upper light source plate and a lower light source plate symmetrically arranged along the water flow direction;

[0012] At least two lamp bead chips are arranged at intervals along the water flow direction on the upper light source plate. The lamp bead chips are surface-mounted on the upper light source plate through lamp bead brackets. The light emitted by the lamp bead chips is UVC light. A first heat dissipation silica gel sheet is arranged at the interval between the lamp bead chips. The upper end surface of the first heat dissipation silica gel sheet is attached to the lower end surface of the upper light source plate, the lower end surface of the first heat dissipation silica gel sheet is attached to the outer side surface of the glass tube, and the two side end surfaces of the first heat dissipation silica gel sheet are in clearance fit with the lamp bead chips on the upper light source plate;

[0013] At least two lamp bead chips are arranged at intervals along the water flow direction on the lower light source plate. The lamp bead chips are surface-mounted on the lower light source plate through lamp bead brackets. The light emitted by the lamp bead chips is UVC light. A second heat dissipation silica gel sheet is arranged at the interval between the lamp bead chips. The lower end surface of the second heat dissipation silica gel sheet is attached to the upper end surface of the lower light source plate, the upper end surface of the second heat dissipation silica gel sheet is attached to the outer side surface of the glass tube, and the two side end surfaces of the second heat dissipation silica gel sheet are in clearance fit with the lamp bead chips on the lower light source plate; The lamp bead chips on the upper light source plate and the lower light source plate are arranged in a staggered layout, and the orthographic projections of the lamp beads on the upper light source plate and the lower light source plate on the first side wall plane do not overlap;

[0014] The polytetrafluoroethylene tube is sleeved on the outer wall of the glass tube. The polytetrafluoroethylene tube is provided with installation windows for the light source plate assembly. The installation windows include an upper installation window and a lower installation window. The upper installation window is located on the tube wall of the polytetrafluoroethylene tube close to the first side wall, and the lower installation window is located on the tube wall of the polytetrafluoroethylene tube close to the second side wall. The installation windows accommodate the lamp bead chips on the light source plate assembly and the interval part between the lamp bead chips; The lamp bead chips project UVC light into the flowing water channel through the installation windows, and the UVC light irradiates the entire flowing water channel through the reflection of the polytetrafluoroethylene tube;

[0015] At the water outlet end of the glass tube, an elastic middle frame is further included;

[0016] The elastic middle frame is a cavity structure with a cavity formed by sequentially connecting a first planar side wall, a first arc-shaped side wall, a second planar side wall, and a second arc-shaped side wall; the first planar side wall and the second planar side wall are arranged in mirror symmetry, and rectangular hollow areas and at least one positioning pin are provided on both the first planar side wall and the second planar side wall for fixedly installing the light source board assembly;

[0017] Both the first arc-shaped side wall and the second arc-shaped side wall are superior arc-shaped side walls, and the arc parts bulge outward from the elastic middle frame; along the water flow direction, rectangular protrusions are provided at the middle of the outer surfaces of the first arc-shaped side wall and the second arc-shaped side wall, and rectangular grooves are provided at the middle of the inner surfaces of the third side wall and the fourth side wall. The rectangular grooves are recessed in the direction away from the cavity of the housing, and the rectangular protrusions are matched and positioned with the rectangular grooves;

[0018] The elastic middle frame is sleeved on the outer side of the polytetrafluoroethylene tube at the water outlet end of the glass tube, and the glass tube and the polytetrafluoroethylene tube sleeved on the glass light are accommodated in the cavity of the elastic middle frame;

[0019] The outer side of the elastic middle frame is in contact with the light source board assembly; an upper light source board is provided between the first planar side wall and the first side wall on the housing, and the upper light source board is in contact with the first side wall by cooperating with the first planar side wall; a lower light source board is provided between the second planar side wall and the second side wall on the housing, and the lower light source board is in contact with the second side wall by cooperating with the second planar side wall;

[0020] A thermal conductive silicone grease coating is applied on the surface of the light source board assembly that is in contact with the housing;

[0021] The thermal conductive coefficient of the heat dissipation silicone sheet is 6 - 15 W / m·K, and the thickness of the heat dissipation silicone sheet is 1.5 - 4 mm. The heat dissipation silicone sheet has a certain compressible thickness.

[0022] In this application, there is a gap between the heat dissipation silicone sheet and the lamp bead chip, which is convenient for assembly without interference.

[0023] Optionally, the length of the sub-fin along the water flow direction is equal to the length of the housing, the thickness of the sub-fin is 0.7 mm, the distance between adjacent two sub-fins is 1.5 mm, and the height of the sub-fin in the direction perpendicular to the first side wall is 6.4 mm.

[0024] Optionally, the emission angle of the UVC light emitted by the lamp bead chip is not less than 120°;

[0025] The first emission area formed by the lamp bead chips on the upper light source plate emitting UVC light overlaps at least at the edge with the second emission area formed by the lamp bead chips on the lower light source plate. Among them, the orthographic projections of the lamp bead chips on the upper light source plate and the lamp bead chips on the lower light source plate on the first side wall plane are adjacent. Specifically, in this application, the upper and lower light source plates are respectively provided with two lamp bead chips, and the 4 lamp bead chips are arranged staggeredly, that is, there is no overlap in the projection on the first side wall. The distance between the two lamp bead chips on the upper and lower light source plates is preferably with an emission angle of 120° and an overlap between the edges, so as to achieve covering the 360° cross-section of the glass tube. Combined with the Teflon (PTFE) reflection layer, the scattered light is directionally reflected into the water flow, and the utilization rate of ultraviolet rays is increased by 40%.

[0026] In this application, the elastic middle frame fixes the light source plate assembly in the cavity of the housing, and through the elasticity, the light source plate and the radiator are in full contact, and the heat conduction effect is better.

[0027] Optionally, the ultraviolet sterilization module further includes a driving board and a wire harness, and the driving board is electrically connected to the lamp bead chips through the wire harness; the installation position of the driving board is divided into an internal driving board and an external driving board according to the use requirements;

[0028] The lamp bead bracket is provided with a positive lead, a negative lead and a heat conduction lead; the positive lead and the negative lead are respectively connected to the driving board, and the heat conduction lead is connected to the heat dissipation silica gel sheet; the heat conduction lead conducts and leads out the core heat of the lamp bead chip to the strip-shaped heat dissipation silica gel sheet between adjacent two lamp beads on the light source plate assembly.

[0029] Optionally, the material of the housing is aluminum alloy;

[0030] Aluminum nitride is added to the raw material of the heat dissipation silica gel sheet.

[0031] In this application, aluminum nitride is added to the raw material of the heat dissipation silica gel sheet to increase the thermal conductivity coefficient; using a flexible polytetrafluoroethylene tube as the reflection layer makes use of the characteristics of polytetrafluoroethylene, which has a reflection effect on UVC ultraviolet light.

[0032] Optionally, the ultraviolet sterilization module further includes an inlet plug and an outlet plug;

[0033] The inlet plug and the outlet plug are respectively fixedly connected to both ends of the housing;

[0034] The inlet plug and the outlet plug are respectively hermetically connected to the water inlet end and the water outlet end of the glass tube;

[0035] The water inlet plug is provided with a first installation platform, and cylindrical protrusion parts are arranged on both opposite end faces of the first installation platform. Among them, the length of the protrusion part close to the glass tube is less than the length of the protrusion part far from the glass tube;

[0036] The water outlet plug is provided with a second installation platform, and cylindrical protrusion parts are arranged on both opposite end faces of the second installation platform. Among them, the length of the protrusion part close to the glass tube is less than the length of the protrusion part far from the glass tube;

[0037] Through holes are arranged horizontally along the inner edges of the water inlet plug and the water outlet plug.

[0038] Optionally, the ultraviolet sterilization module further includes a sealing gasket. The water inlet plug is hermetically connected to the water inlet end of the glass tube through the sealing gasket;

[0039] The water outlet plug is hermetically connected to the water outlet end of the glass tube through the sealing gasket;

[0040] The sealing gasket is a circular sealing gasket, and a circular groove is arranged on the side fitting the glass tube, and the groove is recessed toward the side far from the glass tube.

[0041] Optionally, the water inlet plug is provided with a stepped through hole communicating with the flowing water channel in the glass tube. Among them, along the water flow direction, the through hole diameter of the water inlet end of the water inlet plug is larger than the through hole diameter of the water outlet end of the water inlet plug;

[0042] The water outlet plug is provided with a stepped through hole communicating with the flowing water channel in the glass tube. Among them, along the water flow direction, the through hole diameter of the water outlet end of the water outlet plug is larger than the through hole diameter of the water inlet end of the water outlet plug.

[0043] In a second aspect, the present application provides a water purification device, including a water purifier and the above-mentioned ultraviolet sterilization module. The ultraviolet sterilization module is connected in series on the water outlet pipeline of the water purifier, and the flux of the water purifier is above 400G (gallons).

[0044] Compared with the prior art, the ultraviolet sterilization module provided by the present invention has at least achieved the following beneficial effects:

[0045] First, the present invention is a highly efficient heat dissipation UVC ultraviolet sterilization module, which is suitable for the end of a large-flux water purifier. It uses the UVC ultraviolet light emitted by UVC-LED lamps to irradiate and sterilize the water in pipelines and water storage devices, without introducing new substances, and the sterilization is more efficient, safe and reliable, becoming a trend of safe and efficient sterilization;

[0046] Second, in the structural design and layout of the sterilization module of the present invention, there are water inlets and outlets on both the left and right sides, and the middle glass tube is for water flow. There are light source plates above and below the glass tube, and at least 4 high-power UVC-LED lamp beads on the light source plates (a high-power UVC-LED lamp bead means that the radiation power of a single LED chip is relatively high, usually ≥50 mW, and can even reach more than 100 - 200 mW) are arranged with an offset up and down, irradiating the glass pipeline 360° all-round, making full use of ultraviolet light, with high ultraviolet utilization efficiency. Therefore, bacteria growing in the pipeline can be effectively killed, achieving effective sterilization;

[0047] Third, a "dual-path heat dissipation system" is constructed. On the one hand, through the aluminum alloy shell and wide fin structure, and on the other hand, by utilizing the high thermal conductivity of the flexible aluminum nitride silicone sheet, a composite heat dissipation mode of "solid heat conduction + water flow taking away heat" is formed; the composite heat dissipation mode of the "dual-path heat dissipation system" adopted in this application reduces the shell temperature by 20% - 30%, and significantly improves the heat dissipation efficiency;

[0048] Fourth, the shell uses aluminum alloy and has multiple wide fins on the upper and lower surfaces in the structural design, increasing the surface area of the shell, which is conducive to efficient heat dissipation, reducing the accelerated attenuation of UVC lamp beads due to excessive heat accumulation in the chip, and extending the service life of the sterilization module;

[0049] Fifth, the flexible high-thermal-conductivity heat dissipation (aluminum nitride) silicone sheet: makes full use of the gap between the front of the light source plate and the glass tube, and at the same time, due to its flexible characteristics, the fitting between the two is closer, which is more conducive to quickly and efficiently conducting the heat of the UVC lamp beads on the light source plate into the glass tube, and at the same time, the heat is taken away by the flowing water in the pipeline;

[0050] Sixth, it has a compact structure and is convenient for assembly.

[0051] Of course, it is not necessarily required that any product implementing the present invention simultaneously achieves all of the above technical effects.

[0052] Through the following detailed description of the exemplary embodiments of the present invention with reference to the accompanying drawings, other features and advantages of the present invention will become clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The drawings incorporated in the specification and constituting a part of the specification illustrate embodiments of the present invention, and together with the description are used to explain the principles of the present invention.

[0054] Figure 1 is a cross-sectional view of a UVC-LED ultraviolet sterilization module provided by the present invention;

[0055] Figure 2 is a structural diagram of a UVC-LED ultraviolet sterilization module provided by the present invention;

[0056] Figure 3It is a structural diagram of the housing in a UVC-LED ultraviolet sterilization module provided by the present invention;

[0057] Figure 4 It is a schematic structural diagram of an elastic middle frame in a UVC-LED ultraviolet sterilization module provided by the present invention.

[0058] The numbers of the attached drawings are respectively:

[0059] 1. Inlet plug; 2. Sealing gasket; 21. First sealing gasket; 22. Second sealing gasket; 3. Housing; 31. First side wall; 32. Second side wall; 33. Third side wall; 34. Fourth side wall; 35. Heat exchange fin group; 4. Heat dissipation silica gel sheet; 41. First heat dissipation silica gel sheet; 42. Second heat dissipation silica gel sheet; 5. UVC-LED lamp bead; 6. Light source board assembly; 61. Upper light source board; 62. Lower light source board; 7. Glass tube; 8. Polytetrafluoroethylene tube; 9. Elastic middle frame; 91. First planar side wall; 92. Second planar side wall; 93. First arc-shaped side wall; 94. Second arc-shaped side wall; 10. Outlet plug. Detailed implementation manners

[0060] Now, various exemplary embodiments of the present invention will be described in detail with reference to the attached drawings. It should be noted that: Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0061] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way serves as a limitation to the present invention and its application or use.

[0062] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the specification.

[0063] In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0064] It should be noted that: Similar reference numerals and letters denote similar items in the following attached drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0065] Embodiment 1

[0066] Refer to Figure 1 as shown Figure 1 It is a cross-sectional view of a UVC-LED ultraviolet sterilization module provided by the present invention; Figure 2It is a structural diagram of a UVC-LED ultraviolet sterilization module provided by the present invention;

[0067] Figure 3 It is a structural diagram of a housing in a UVC-LED ultraviolet sterilization module provided by the present invention;

[0068] Figure 4 It is a schematic structural diagram of an elastic middle frame in a UVC-LED ultraviolet sterilization module provided by the present invention.

[0069] This embodiment provides a UVC-LED ultraviolet sterilization module. The core components of the UVC-LED ultraviolet sterilization module include a housing 3, a light source board assembly 6, a polytetrafluoroethylene tube 8, a glass tube 7, and a heat dissipation silica gel sheet 4; among them,

[0070] The housing 3 is a cavity housing that is penetrated along the water flow direction, and the light source board assembly 6, the polytetrafluoroethylene tube 8, the glass tube 7, and the heat dissipation silica gel sheet 4 are all placed in the cavity of the housing 3;

[0071] The housing 3 includes a first side wall 31 and a second side wall 32 that are arranged in parallel. Both the first side wall 31 and the second side wall 32 are flat side walls. The first side wall 31 and the second side wall 32 are connected by a third side wall 33 and a fourth side wall 34 that are mirror-symmetrically arranged. Both the third side wall 33 and the fourth side wall 34 are convex arc-shaped side walls protruding outward from the housing 3;

[0072] The first side wall 31 and the second side wall 32 are mirror-symmetrically arranged. A set of heat exchange fin groups 35 are respectively provided on the first side wall 31 and the second side wall 32. The heat exchange fin group 35 includes 7 sub-fins. Along the direction from the third side wall 33 to the fourth side wall 34, the 7 sub-fins are arranged in equal-distance intervals side by side; the heat exchange fin group 35 is located outside the housing 3; the sub-fins are plate-shaped structures and are perpendicular to the first side wall 31 and / or the second side wall 32, and the extending direction of the sub-fins is parallel to the water flow direction;

[0073] The glass tube 7 is located on the central axis of the cavity of the housing 3 along the water flow direction. The glass tube 7 is a pipe fitting with a flowing water cavity. Along the water flow direction, the two ends of the glass tube 7 are respectively a water inlet end and a water outlet end;

[0074] At least one light source board assembly 6 is provided between the outer side of the glass tube 7 and the inner wall of the housing 3. The light source board assembly 6 includes an upper light source board 61 and a lower light source board 62 that are symmetrically arranged along the water flow direction;

[0075] On the upper light source board 61, there are at least two UVC-LED beads 5 arranged at intervals along the water flow direction. The light emitted by the UVC-LED beads 5 is UVC light. The UVC-LED beads 5 are mounted on the upper light source board 61 through bead brackets. At the intervals between the UVC-LED beads 5, there is a first heat dissipation silica gel sheet 41. The upper end face of the first heat dissipation silica gel sheet 41 is attached to the lower end face of the upper light source board 61, the lower end face of the first heat dissipation silica gel sheet 41 is attached to the outer side surface of the glass tube 7, and the two side end faces of the first heat dissipation silica gel sheet 41 are in clearance fit with the UVC-LED beads 5 on the upper light source board 61. On the lower light source board 62, there are at least two UVC-LED beads 5 arranged at intervals along the water flow direction. The UVC-LED beads 5 are mounted on the lower light source board 62 through bead brackets. The light emitted by the beads is UVC light. At the intervals between the UVC-LED beads 5, there is a second heat dissipation silica gel sheet 42. The lower end face of the second heat dissipation silica gel sheet 42 is attached to the upper end face of the lower light source board 62, the upper end face of the second heat dissipation silica gel sheet 42 is attached to the outer side surface of the glass tube 7, and the two side end faces of the second heat dissipation silica gel sheet 42 are in clearance fit with the UVC-LED beads 5 on the lower light source board 62. The UVC-LED beads on the upper light source board 61 and the lower light source board 62 are arranged in a staggered layout, and the orthographic projections of the beads on the upper light source board 61 and the lower light source board 62 on the plane of the first side wall 31 do not overlap.

[0076] The polytetrafluoroethylene tube 8 is sleeved on the outer wall of the glass tube 7. The polytetrafluoroethylene tube 8 is provided with an installation window for the light source board assembly 6. The installation window includes an upper installation window and a lower installation window. The upper installation window is located on the tube wall of the polytetrafluoroethylene tube 8 close to the first side wall 31, and the lower installation window is located on the tube wall of the polytetrafluoroethylene tube 8 close to the second side wall 32. The installation window can accommodate the UVC-LED beads 5 on the light source board assembly 6 and the interval part between the UVC-LED beads 5. The UVC-LED beads 5 project UVC light into the flowing water cavity through the installation window of the polytetrafluoroethylene tube 8, and the UVC light irradiates the entire flowing water cavity through the reflection of the polytetrafluoroethylene tube 8.

[0077] A heat conductive silicone grease coating is applied on the surface of the light source board assembly 6 that is in contact with the housing 3.

[0078] The heat conduction coefficient of the heat dissipation silica gel sheet 4 is 6 - 12 W / m·K, the thickness of the heat dissipation silica gel sheet 4 is between 1.5 - 4 mm, and the heat dissipation silica gel sheet has a certain compressible thickness depending on the use environment and specific conditions.

[0079] Specifically, in this embodiment, there is a gap between the heat dissipation silica gel sheet 4 and the UVC-LED beads 5, which is convenient for assembly without interference.

[0080] In this embodiment, as Figure 1As shown in the figure, a light source board assembly 6 is provided between the outer side of the glass tube 7 and the inner wall of the housing 3. The light source board assembly 6 includes an upper light source board 61 and a lower light source board 62 symmetrically arranged along the horizontal axial direction. On the upper light source board 61, two UVC-LED beads 5 are arranged at intervals along the horizontal axial direction of the glass tube 7. At the interval between the two UVC-LED beads 5, there is a heat dissipation layer area where a first heat dissipation silica gel sheet 41 is provided. The first heat dissipation silica gel sheet 41 is a soft high thermal conductivity heat dissipation silica gel sheet with a thermal conductivity of 15 W / m·K and a thickness of 4 mm. Aluminum nitride is added to the raw material of the first heat dissipation silica gel sheet 41 to increase its thermal conductivity. On the lower light source board 62, two UVC-LED beads 5 are arranged at intervals along the horizontal axial direction of the glass tube. At the interval between the two UVC-LED beads 5, there is a heat dissipation layer area where a second heat dissipation silica gel sheet 42 is provided. The second heat dissipation silica gel sheet 42 is a soft high thermal conductivity heat dissipation silica gel sheet with a thermal conductivity of 15 W / m·K and a thickness of 4 mm. Aluminum nitride is added to the raw material of the second heat dissipation silica gel sheet 42.

[0081] The two UVC-LED beads 5 on the upper light source board 61 and the second UVC-LED bead 5 on the lower light source board 62 are arranged in a staggered layout, that is, their projections on the first side wall 31 do not overlap. The distance between the two beads on the upper and lower light source boards is preferably such that the emission angle is 120° and the edges overlap with each other, so as to achieve coverage of the 360° cross-section of the glass tube. Combined with the Teflon (PTFE) reflection layer, the scattered light is directionally reflected into the water flow, and the ultraviolet utilization rate is increased by 40%.

[0082] In this application, the adopted beads all emit light at a large angle (more than 120°), and the installation window needs to satisfy that the UVC light is reflected on the polytetrafluoroethylene tube to avoid waste of light energy.

[0083] The four high-power UVC-LED beads on the light source board are arranged in a staggered layout up and down, irradiating the glass pipeline 360° all-round, making full use of ultraviolet light, with high ultraviolet utilization efficiency. Therefore, it can effectively kill the bacteria growing in the pipeline and achieve effective sterilization.

[0084] As Figure 3 As shown in the figure, the housing 3 is a cavity housing with a cavity running through along the water flow direction. The housing includes a first side wall 31 and a second side wall 32 arranged in parallel. Both the first side wall 31 and the second side wall 32 are flat side walls. The first side wall 31 and the second side wall 32 are connected by a third side wall 33 and a fourth side wall 34 arranged in a mirror image. Both the third side wall 33 and the fourth side wall 34 are convex arc-shaped side walls protruding towards the outside of the housing.

[0085] The first side wall 31 and the second side wall 32 are arranged in mirror symmetry. A set of heat exchange fin groups 35 are respectively provided on the first side wall 31 and the second side wall 32. The heat exchange fin group 35 includes 7 sub-fins. Along the direction from the third side wall 33 to the fourth side wall 34, the 7 sub-fins are arranged in parallel at equal intervals; the heat exchange fin group 35 is located outside the housing; the sub-fin is a plate-like structure, perpendicular to the first side wall 31 and / or the second side wall 32, and the extending direction of the sub-fin is parallel to the water flow direction; the length of the sub-fin along the water flow direction is equal to the length of the housing, the thickness of the sub-fin is 0.7 mm, the distance between two adjacent sub-fins is 1.5 mm, and the height of the sub-fin in the direction perpendicular to the first side wall 31 is 6.4 mm. In this embodiment, the heat dissipation fin group triples the surface area of the housing, which is beneficial to the air convection heat dissipation effect.

[0086] At the water outlet end of the glass tube 7, there is also an elastic middle frame 9, as Figure 4 shown. The elastic middle frame 9 is a cavity structure with a cavity formed by sequentially connecting a first planar side wall 91, a first arc side wall 93, a second planar side wall 92, and a second arc side wall 94; the first planar side wall 91 and the second planar side wall 92 are arranged in mirror symmetry. Both the first planar side wall 91 and the second planar side wall 92 are provided with a rectangular hollow area and 4 positioning pins. The rectangular hollow area is the installation position of the light source board assembly 6, and the positioning pins prevent the light source board from shifting, ensuring that the lamp beads are aligned with the installation windows on the polytetrafluoroethylene tube to emit UVC light; along the water flow direction, the first planar side wall 91 and the second planar side wall 92 are provided with a square groove at one end close to the water inlet direction, and the square groove is recessed towards the water outlet direction; the first planar side wall 91 and the second planar side wall 92 are provided with a square protrusion at one end close to the water outlet direction, and the square protrusion protrudes towards the water outlet direction; both the first arc side wall 93 and the second arc side wall 94 are superior arc side walls, and the arc parts bulge towards the outside of the elastic middle frame. Along the water flow direction, rectangular protrusions are provided in the middle of the outer surfaces of the first arc side wall 93 and the second arc side wall 94, and rectangular grooves are provided in the middle of the inner surfaces of the third side wall 33 and the fourth side wall 34. The rectangular grooves are recessed towards the direction away from the cavity of the housing 3. The rectangular protrusions and the rectangular grooves cooperate with each other for positioning and prevent the elastic middle frame 9 from rotating at the same time;

[0087] The elastic middle frame 9 is sleeved on the outside of the polytetrafluoroethylene tube 8 at the water outlet end of the glass tube. Inside the cavity of the elastic middle frame 9, the glass tube 7 and the polytetrafluoroethylene tube 8 sleeved on the glass light are accommodated;

[0088] The outer side of the elastic middle frame 9 is in contact with the light source board assembly 6; an upper light source board 61 is provided between the first planar side wall 91 and the first side wall 31 on the housing, and the upper light source board 61 is in contact with the first side wall 31 by cooperating with the first planar side wall 91; a lower light source board 62 is provided between the second planar side wall 92 and the second side wall 32 on the housing, and the lower light source board 62 is in contact with the second side wall 32 by cooperating with the second planar side wall 92.

[0089] In this application, the elastic middle frame 9 fixes the light source board assembly 6 in the cavity of the housing 3, and through elasticity, the light source board and the housing are in full contact, and the heat conduction effect is better.

[0090] Specifically, in this embodiment, the elastic middle frame 9 uses an elastic material and has a compact structure design. The light source board assembly 6 is fixed on the upper and lower surfaces of the elastic middle frame 9. At the same time, a uniform thermal conductive silicone grease coating is applied to the back surface of the light source board in the light source board assembly 6. It is loaded from the side of the housing 3. By using the elasticity of the elastic middle frame 9, it springs open after being loaded, so that the back surface of the light source board is tightly sealed and attached to the upper and lower inner walls of the housing 3, and the heat of the light source board is introduced into the housing 3 from the back surface. Since the heat dissipation surface area of the housing 3 is large, the heat dissipation is more efficient.

[0091] In this embodiment, the ultraviolet sterilization module further includes a driving board and a wire harness. The driving board is electrically connected to the lamp beads through the wire harness. The installation position of the driving board is divided into an internal driving board and an external driving board according to the use requirements. The lamp bead bracket is provided with a positive lead, a negative lead and a heat conducting lead; the positive lead and the negative lead are respectively connected to the driving board, and the heat conducting lead is connected to the heat dissipation silicone sheet; the heat conducting lead conducts and leads out the core heat of the lamp bead chip to the light source board assembly and the long strip-shaped heat dissipation silicone sheet between adjacent two lamp beads.

[0092] In this embodiment, the material of the housing 3 is aluminum alloy; the raw material of the heat dissipation silicone sheet 4 is aluminum nitride to increase the thermal conductivity coefficient. The materials selected in this application can improve the heat dissipation rate, further improve the heat dissipation of the UVC lamp beads, reduce the acceleration of the attenuation of the UVC lamp beads due to excessive chip heat accumulation, and extend the service life of the sterilization module. Using a soft polytetrafluoroethylene tube as the reflection layer makes use of the characteristics of polytetrafluoroethylene, which has a reflection effect on UVC ultraviolet light.

[0093] The UVC-LED ultraviolet sterilization module further includes a water inlet plug 1 and a water outlet plug 10; the water inlet plug 1 and the water outlet plug 10 are respectively fixedly connected to both ends of the housing 3; the water inlet plug 1 and the water outlet plug 10 are respectively hermetically connected to the water inlet end and the water outlet end of the glass tube 7; the water inlet plug 1 is provided with a first mounting platform, and cylindrical convex portions are provided on both opposite end faces of the first mounting platform. Among them, the length of the convex portion close to the glass tube is less than the length of the convex portion far from the glass tube; the water outlet plug 10 is provided with a second mounting platform, and cylindrical convex portions are provided on both opposite end faces of the second mounting platform. Among them, the length of the convex portion close to the glass tube is less than the length of the convex portion far from the glass tube; through holes are provided horizontally along the inner edges of the water inlet plug 1 and the water outlet plug 10. The UVC-LED ultraviolet sterilization module can be connected to the water purification device and the water outlet pipeline through the water inlet plug 1 and the water outlet plug 10.

[0094] Specifically, as Figure 1 described, the UVC-LED ultraviolet sterilization module further includes a gasket 2. The water inlet plug 1 is hermetically connected to the water inlet end of the glass tube 7 through a first gasket 21; the water outlet plug 10 is hermetically connected to the water outlet end of the glass tube 7 through a second gasket 22. The gasket is a circular gasket, and a circular groove is provided on the side that fits the glass tube 7. The groove is recessed toward the side away from the glass tube 7. During installation, the tube wall of the glass tube 7 cooperates with the groove to achieve sealing.

[0095] As Figure 1 described, the water inlet plug 1 is provided with a stepped through hole communicating with the water flow channel in the glass tube 7. Among them, along the water flow direction, the through hole diameter at the water inlet end of the water inlet plug 1 is larger than the through hole diameter at the water outlet end of the water inlet plug 1, that is, in the water inlet plug 1, the through hole diameter at the end far from the glass tube 7 is larger than the through hole diameter at the end close to the glass tube 7;

[0096] The water outlet plug 10 is provided with a stepped through hole communicating with the water flow channel in the glass tube 7. Among them, along the water flow direction, the through hole diameter at the water outlet end of the water outlet plug 10 is larger than the through hole diameter at the water inlet end of the water outlet plug 10, that is, in the water outlet plug 10, the through hole diameter at the end far from the glass tube 7 is larger than the through hole diameter at the end close to the glass tube 7.

[0097] Specifically, in this embodiment, the high-efficiency heat conduction and heat dissipation method consists of two high-efficiency heat conduction and heat dissipation methods:

[0098] The first method is that the elastic middle frame 9 fixes the upper light source plate 61 and the lower light source plate 62. At the same time, a uniform thermal conductive silicone grease coating is applied to the back of the light source plate. After being installed in the housing 3, the elastic force of the elastic middle frame 9 is used to closely fit the light source plate to the inner wall of the housing 3. The housing 3 is made of aluminum alloy and has multiple wide fins on the upper and lower surfaces in the structural design, which increases the surface area of the housing 3, is conducive to dissipating heat to the ambient air, and is conducive to reducing the heat of the UVC-LED lamp beads 5.

[0099] The heat conduction path of the second method is UVC-LED lamp bead → aluminum nitride silicone sheet (6 - 15W / m·K) → glass tube → flowing water. On the front surfaces of the upper light source plate 61 and the lower light source plate 62, in the heat dissipation layer area between the UVC-LED lamp beads 5, soft high thermal conductivity heat dissipation silicone sheets (aluminum nitride) (the first heat dissipation silicone sheet 41 / the second heat dissipation silicone sheet 42) are respectively pasted. After the upper light source plate 61 and the lower light source plate 62 are installed in the sterilization module, the lower surfaces of the soft high thermal conductivity heat dissipation silicone sheets (aluminum nitride) (the first heat dissipation silicone sheet 41 / the second heat dissipation silicone sheet 42) are tightly sealed and attached to the surface of the glass tube 7, and the heat of the UVC-LED lamp beads on the upper light source plate 61 and the lower light source plate 62 is introduced to the surface of the glass tube 7, and finally introduced into the flowing water to take away the heat, reducing the core working temperature of the UVC-LED lamp beads.

[0100] The above high-efficiency heat conduction and heat dissipation solutions can meet the sterilization requirements of high-power UVC-LED applications. At the same time, the shell temperature is reduced by 20 - 30°C, and the core temperature of the lamp beads is reduced by 15 - 20°C (compared with the scheme without silicone gaskets). The efficiency of heat transfer to the water flow is increased by more than 40%. It reduces the rapid attenuation of UVC lamp beads due to excessive heat accumulation in the UVC chip, significantly extends the life of UVC-LEDs, and the life of the sterilization module is extended by 1.5 times compared with the traditional module, achieving the extension of the life of the sterilization module.

[0101] Example 2 This example provides a water purification device, including a water purifier and the ultraviolet sterilization module obtained in Example 1. Among them, the water purifier is a large-flux water purifier with a flux of more than 400G (gallons) and a flow rate of more than 2L / min. The UVC-LED ultraviolet sterilization module obtained in Example 1 is connected in series to the water outlet pipeline of the water purifier to perform secondary sterilization treatment on the water in the pipeline and the water storage device.

[0102] As can be seen from the above examples, the UVC-LED ultraviolet sterilization module and the water purification device provided by the present invention have at least achieved the following beneficial effects:

[0103] (1) In the structural design layout of the sterilization module in this example, there are water inlets and outlets on the left and right sides, the glass tube in the middle is for water flow, there are light source plates above and below the glass tube, and the 4 high-power UVC-LED lamp beads on the light source plates are arranged in a staggered layout up and down, irradiating the glass pipeline 360° all around, making full use of ultraviolet light, with high ultraviolet light utilization efficiency. Therefore, it can effectively kill the bacteria growing in the pipeline and effectively sterilize.

[0104] (2) Constructing a "dual-path heat dissipation system" by, on the one hand, using the aluminum alloy shell and wide fin structure, and on the other hand, utilizing the high thermal conductivity of the soft aluminum nitride silicone sheet, to form a composite heat dissipation mode of "solid-state heat conduction + water flow away": The composite heat dissipation mode of the "dual-path heat dissipation system" adopted in this application reduces the shell temperature by 20%-30%, and significantly improves the heat dissipation efficiency;

[0105] The shell is made of aluminum alloy and has multiple wide fins on both sides of the structure, which increases the surface area of the shell by more than 3 times, facilitating efficient heat dissipation, reducing excessive heat accumulation in the chip, accelerating the attenuation of UVC lamp beads, and extending the life of the sterilization module by 1.5 times;

[0106] Soft high thermal conductivity and heat dissipation (aluminum nitride) silicone sheet: makes full use of the gap between the front of the light source board and the glass tube, and takes advantage of its softness to make the two fit more closely, which is more conducive to quickly and efficiently introducing the heat of the UVC lamp beads on the light source board into the glass tube, while the heat is taken away by the flowing water in the pipe.

[0107] (3) The overall UVC-LED ultraviolet sterilization module has a compact structure and is easy to assemble.

[0108] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. An ultraviolet sterilization module, characterized in that, It includes a housing, a light source board assembly, a polytetrafluoroethylene tube, a glass tube, and a heat dissipation silica gel sheet with a long strip shape; wherein, The housing is a cavity housing with a through hole along the water flow direction, and the light source board assembly, the polytetrafluoroethylene tube, the glass tube, and the heat dissipation silica gel sheet are all placed in the cavity of the housing; The housing includes a first side wall and a second side wall arranged in parallel. The first side wall and the second side wall are both flat side walls. The first side wall and the second side wall are connected by a third side wall and a fourth side wall arranged in mirror image. The third side wall and the fourth side wall are both convex arc-shaped side walls protruding towards the outside of the housing; The first side wall and the second side wall are arranged in mirror symmetry. A set of heat exchange fin groups are respectively arranged on the first side wall and the second side wall. The heat exchange fin group includes 7 sub-fins. Along the direction from the third side wall to the fourth side wall, the 7 sub-fins are arranged in equal-distance intervals side by side; the heat exchange fin group is located outside the housing; the sub-fin is a plate-like structure, perpendicular to the first side wall and / or the second side wall, and the extending direction of the sub-fin is parallel to the water flow direction; The glass tube is located on the central axis along the water flow direction in the cavity of the housing. The glass tube is a pipe fitting with a flowing water channel. Along the water flow direction, the two ends of the glass tube are respectively a water inlet end and a water outlet end; At least one light source board assembly is arranged between the outer side of the glass tube and the inner wall of the housing. The light source board assembly includes an upper light source board and a lower light source board arranged symmetrically along the water flow direction; At least two lamp bead chips are arranged on the upper light source board at intervals along the water flow direction. The lamp bead chips are surface-mounted on the upper light source board through lamp bead brackets. The light emitted by the lamp bead chips is UVC light. A first heat dissipation silica gel sheet is arranged at the interval between the lamp bead chips. The upper end surface of the first heat dissipation silica gel sheet is attached to the lower end surface of the upper light source board. The lower end surface of the first heat dissipation silica gel sheet is attached to the outer side surface of the glass tube. The two side end surfaces of the first heat dissipation silica gel sheet are in clearance fit with the lamp bead chips on the upper light source board respectively; At least two lamp bead chips are arranged on the lower light source board at intervals along the water flow direction. The lamp bead chips are surface-mounted on the lower light source board through lamp bead brackets. The light emitted by the lamp bead chips is UVC light. A second heat dissipation silica gel sheet is arranged at the interval between the lamp bead chips. The lower end surface of the second heat dissipation silica gel sheet is attached to the upper end surface of the lower light source board. The upper end surface of the second heat dissipation silica gel sheet is attached to the outer side surface of the glass tube. The two side end surfaces of the second heat dissipation silica gel sheet are in clearance fit with the lamp bead chips on the lower light source board respectively; the positive projections of the lamp bead chips on the upper light source board and the lower light source board on the plane of the first side wall do not overlap; The polytetrafluoroethylene tube is sleeved on the outer wall of the glass tube. An installation window for the light source board assembly is provided on the polytetrafluoroethylene tube. The installation window includes an upper installation window and a lower installation window. The upper installation window is located on the tube wall of the polytetrafluoroethylene tube close to the first side wall, and the lower installation window is located on the tube wall of the polytetrafluoroethylene tube close to the second side wall. The installation window accommodates the lamp bead chips on the light source board assembly and the spaced parts between the lamp bead chips; the lamp bead chips project UVC light into the flowing water cavity through the installation window, and the UVC light irradiates the entire flowing water cavity through the reflection of the polytetrafluoroethylene tube; At the water outlet end of the glass tube, an elastic middle frame is further included; The elastic middle frame is a cavity structure with a cavity surrounded by a first planar side wall, a first arc side wall, a second planar side wall, and a second arc side wall connected in sequence; the first planar side wall and the second planar side wall are arranged in mirror symmetry, and both the first planar side wall and the second planar side wall are provided with rectangular hollow areas and at least one positioning pin for fixedly installing the light source board assembly; Both the first arc side wall and the second arc side wall are excellent arc side walls, and the arc parts bulge outward from the elastic middle frame; along the water flow direction, rectangular convex parts are provided in the middle of the outer surfaces of the first arc side wall and the second arc side wall, and rectangular grooves are provided in the middle of the inner surfaces of the third side wall and the fourth side wall. The rectangular grooves are recessed in the direction away from the cavity of the housing, and the rectangular convex parts cooperate with the rectangular grooves for positioning; The elastic middle frame is sleeved on the outer side of the polytetrafluoroethylene tube at the water outlet end of the glass tube. Inside the cavity of the elastic middle frame, the glass tube and the polytetrafluoroethylene tube sleeved on the glass tube are accommodated; The outer side of the elastic middle frame is in contact with the light source board assembly; an upper light source board is provided between the first planar side wall and the first side wall on the housing, and the upper light source board is in contact with the first side wall by cooperating with the first planar side wall; a lower light source board is provided between the second planar side wall and the second side wall on the housing, and the lower light source board is in contact with the second side wall by cooperating with the second planar side wall; A heat-conducting silicone grease coating is applied on the surface of the light source board assembly that fits with the housing; The heat-conducting coefficient of the heat-dissipating silicone sheet is 6 - 15 W / m·K, and the thickness of the heat-dissipating silicone sheet is 1.5 - 4 mm.

2. The ultraviolet sterilization module according to claim 1, wherein The length of the sub-fin along the water flow direction is equal to the length of the housing. The thickness of the sub-fin is 0.7 mm, the distance between two adjacent sub-fins is 1.5 mm, and the height of the sub-fin in the direction perpendicular to the first side wall is 6.4 mm.

3. The ultraviolet sterilization module according to claim 1, wherein The emission angle of the UVC light emitted by the lamp bead chip is not less than 120°; The first emission region formed by the lamp bead chips on the upper light source board emitting UVC light overlaps at least at the edge with the second emission region formed by the lamp bead chips on the lower light source board. Among them, the orthographic projections of the lamp bead chips on the upper light source board and the lamp bead chips on the lower light source board on the first side wall plane are adjacent.

4. The ultraviolet sterilization module according to claim 1, wherein the ultraviolet sterilization module further includes a driving board and a wire harness, and the driving board is electrically connected to the lamp bead chips through the wire harness; the lamp bead bracket is provided with a positive lead, a negative lead and a heat conduction lead; the positive lead and the negative lead are respectively connected to the driving board, and the heat conduction lead is connected to the heat dissipation silica gel sheet.

5. The ultraviolet sterilization module according to claim 1, wherein the material of the housing is aluminum alloy; aluminum nitride is added to the raw material of the heat dissipation silica gel sheet.

6. The ultraviolet sterilization module according to claim 1, wherein the ultraviolet sterilization module further includes a water inlet plug and a water outlet plug; the water inlet plug and the water outlet plug are respectively fixedly connected to both ends of the housing; the water inlet plug and the water outlet plug are respectively hermetically connected to the water inlet end and the water outlet end of the glass tube; the water inlet plug is provided with a first installation platform, and cylindrical protrusion parts are provided on both opposite end faces of the first installation platform. Among them, the length of the protrusion part close to the glass tube is less than the length of the protrusion part far from the glass tube; the water outlet plug is provided with a second installation platform, and cylindrical protrusion parts are provided on both opposite end faces of the second installation platform. Among them, the length of the protrusion part close to the glass tube is less than the length of the protrusion part far from the glass tube; through holes are provided in the water inlet plug and the water outlet plug along the water flow direction.

7. The ultraviolet sterilization module according to claim 6, wherein the ultraviolet sterilization module further includes a sealing gasket. The water inlet plug is hermetically connected to the water inlet end of the glass tube through the sealing gasket; the water outlet plug is hermetically connected to the water outlet end of the glass tube through the sealing gasket; the sealing gasket is a circular sealing gasket, and a circular groove is provided on the side fitting the glass tube, and the groove is recessed toward the side away from the glass tube.

8. The ultraviolet sterilization module according to claim 6, wherein the water inlet plug is provided with a stepped through hole communicating with the flowing water cavity in the glass tube. Among them, along the water flow direction, the through hole diameter of the water inlet end of the water inlet plug is larger than the through hole diameter of the water outlet end of the water inlet plug; the water outlet plug is provided with a stepped through hole communicating with the flowing water cavity in the glass tube. Among them, along the water flow direction, the through hole diameter of the water outlet end of the water outlet plug is larger than the through hole diameter of the water inlet end of the water outlet plug.

9. A water purification device, characterized in that, It includes a water purifier and the ultraviolet sterilization module according to any one of claims 1-8. The ultraviolet sterilization module is connected in series on the water outlet pipeline of the water purifier, and the water purifier has a flux of more than 400G.

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