Overflow type sterilization module

Abstract

The utility model discloses an overflowing type sterilization module. The overflowing type sterilization module comprises a shell, a backflow assembly and a sterilization light source assembly, the shell is provided with a containing cavity and a flow guide opening communicating the outside with the containing cavity. The backflow assembly comprises an inner container, a light-transmitting plate and a flow guide pipe, the inner container is arranged in the containing cavity and provided with a cavity, the light-transmitting plate is arranged in the cavity and divides the cavity into a sterilization cavity and a heat dissipation cavity, the sterilization cavity is spherical and provided with an overflowing channel communicated with the containing cavity, one end of the flow guide pipe is communicated with the sterilization cavity, and the other end of the flow guide pipe is located outside the shell. At least one of the overflowing channels is tangent to the inner wall of the sterilization cavity; the sterilization light source assembly is arranged in the heat dissipation cavity. According to the scheme, the stroke of water flow in the sterilization cavity is prolonged through the spherical sterilization cavity and the tangent water inlet, so that the ultraviolet irradiation time of the water flow is prolonged, the sterilization effect is improved, heat of the sterilization light source assembly is taken away through the water flow, the structure is compact, a radiator does not need to be additionally arranged, the integration degree is improved, and the module size is reduced.

Description

Technical Field

[0001] This utility model relates to the field of water flow sterilization technology, specifically to a water flow sterilization module. Background Technology

[0002] Currently, flow-through ultraviolet sterilization modules are widely used in the field of water treatment technology to kill harmful organisms such as bacteria, viruses, and microorganisms in water.

[0003] Publication number CN217323443U discloses an assembled water-flow LED ultraviolet disinfection module, which includes a base plate, support plates fixedly mounted on both sides of the base plate, a quartz glass tube spanning through the two support plates, and a top cover fixedly mounted on the top of the support plates. Ultraviolet lamp bead plates are fixedly mounted across the front and rear sides of the two support plates. A heat sink is fixedly mounted on the outer side of each ultraviolet lamp bead plate. During operation, water flows through the quartz glass tube, and ultraviolet light is emitted from the two ultraviolet lamp bead plates towards each other for disinfection.

[0004] However, since the quartz glass tube in the patent is arranged in a straight line, when it is necessary to extend the water flow under ultraviolet light, the length of the quartz glass tube needs to be increased accordingly, and an ultraviolet lamp plate and heat sink need to be added, resulting in an excessively large module size. Utility Model Content

[0005] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a flow-through sterilization module to solve the technical problem in the prior art that when it is necessary to extend the travel distance of water under ultraviolet light, it is necessary to increase the length of the quartz glass tube and add ultraviolet lamp bead plate and heat sink, resulting in an excessively large module size.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0007] This utility model provides a flow-through sterilization module, comprising:

[0008] The housing has a cavity and a flow port connecting the outside to the cavity;

[0009] A reflux assembly includes an inner liner, a light-transmitting plate, and a flow guide pipe. The inner liner is disposed within the cavity and has a cavity body. The light-transmitting plate is disposed within the cavity body and divides the cavity body into a sterilization cavity and a heat dissipation cavity. The sterilization cavity is spherical and has a flow channel communicating with the cavity body. One end of the flow guide pipe communicates with the sterilization cavity, and the other end is located outside the housing and is tangent to the inner wall of the sterilization cavity along with at least one of the flow channels.

[0010] The sterilization light source assembly is placed in the heat dissipation cavity.

[0011] In some embodiments, the flow channel is tangent to the inner wall of the sterilization chamber;

[0012] The flow-through sterilization module also includes a connecting pipe, which connects to the flow port and is used to introduce the solution to be purified into the cavity, so that the purified solution is output from the flow port.

[0013] In some embodiments, the flow guide is located on the side of the housing closer to the heat dissipation cavity, and the flow passage is located on the side of the sterilization cavity away from the heat dissipation cavity.

[0014] In some embodiments, the flow channel and the guide pipe each have a connecting port that connects to the sterilization chamber, and the circumferential surface of one of the two connecting ports and the tangent to the inner wall of the sterilization chamber is a first plane, and the other connecting port is located on one side of the first plane.

[0015] In some embodiments, the inner liner includes a reflux seat and a heat dissipation seat, the reflux seat and the heat dissipation seat are detachably connected, and each has an inner cavity with an opening on one side, and together they enclose the cavity to form the body.

[0016] The sterilization chamber is located on the side of the light-transmitting plate near the reflux seat, and the heat dissipation chamber is located on the side of the light-transmitting plate near the heat dissipation seat.

[0017] In some embodiments, the heat sink is fixed to the inner wall of the housing, and the opening end of the reflux seat can cover the opening end of the heat sink and be pressed against the heat sink by the inner wall of the housing.

[0018] In some embodiments, the open end of the reflux seat is recessed with a positioning groove, the positioning groove communicating with the inner cavity of the reflux seat, and the heat sink is provided with a positioning cylinder facing the positioning groove, the positioning cylinder being inserted into the positioning groove; and / or,

[0019] The inner liner also includes a first sealing ring, which is disposed between the reflux seat and the heat dissipation seat.

[0020] In some embodiments, the heat sink has an installation channel at its open end, the installation channel communicating with the inner cavity of the heat sink and having an internal thread, and an installation platform is provided around its circumference;

[0021] The light-transmitting plate is placed on the mounting platform, and the return flow assembly further includes a pressure ring. The pressure ring has an external thread and is screwed into the mounting channel, and is located on the side of the light-transmitting plate away from the mounting platform.

[0022] In some embodiments, one end of the inner liner having the heat dissipation cavity is fixed to the housing, and the housing has a wiring channel communicating with the heat dissipation cavity;

[0023] The sterilization light source assembly includes a circuit board, ultraviolet lamp beads, and wires. The circuit board is installed in the heat dissipation cavity, the ultraviolet lamp beads are installed on the circuit board and face the light-transmitting plate, and one end of the wire is connected to the circuit board and the other end extends out of the wiring channel.

[0024] In some embodiments, the housing includes a cover and a base, the cover and the base being detachably connected and together enclosing the cavity.

[0025] Compared with existing technologies, the flow-through sterilization module provided by this utility model, taking the tangentiality between the flow channel and the inner wall of the sterilization chamber as an example, allows water to be introduced into the cavity of the shell from the guide port during operation. The water flow can dissipate heat from the heat dissipation chamber in the inner tank, that is, to dissipate heat from the sterilization light source component, ensuring heat dissipation effect. The water continues to flow and enters the sterilization chamber from the flow channel. At this time, the flow direction of the water is tangential to the inner wall of the sterilization chamber. Therefore, when the water pressure is constant, backflow can be generated in the spherically arranged sterilization chamber, prolonging the water's journey within the sterilization chamber and thus prolonging the water's residence time. The longer the residence time, the higher the dose of ultraviolet light received by the water, improving the sterilization effect. Finally, the purified water is discharged from the guide pipe.

[0026] When the guide pipe is tangent to the inner wall of the sterilization chamber, water is first introduced into the sterilization chamber through the guide pipe. The water can generate backflow in the sterilization chamber. The purified water then enters the container cavity through the flow channel to dissipate heat to the parts of the inner liner with heat dissipation chambers, and finally exits from the guide port.

[0027] Thus, this solution extends the travel time of the water flow within the sterilization chamber through a spherical sterilization chamber and a tangentially positioned water inlet, thereby extending the time the water is exposed to ultraviolet light, improving the sterilization effect, and carrying away the heat from the sterilization light source components through the water flow. The structure is compact and does not require a separate heat sink, improving integration and reducing module size. Attached Figure Description

[0028] Figure 1 This is an exploded view of the flow-through sterilization module provided in this embodiment of the utility model;

[0029] Figure 2 yes Figure 1 Assembly diagram of the medium-flow sterilization module;

[0030] Figure 3 yes Figure 2 Cross-sectional view of the medium-flow sterilization module;

[0031] Figure 4 yes Figure 3 Top view of the inner liner;

[0032] Figure 5 yes Figure 3A schematic diagram of the base and inner liner;

[0033] Figure 6 yes Figure 3 Schematic diagram of the central reflux seat;

[0034] Figure 7 yes Figure 3 A schematic diagram of the heat sink, light-transmitting plate, and pressure ring;

[0035] Figure 8 yes Figure 1 A schematic diagram of the upper and middle covers;

[0036] Figure 9 yes Figure 3 A schematic diagram of the heat sink and ultraviolet lamp beads;

[0037] Figure 10 yes Figure 7 Schematic diagram of the heat sink;

[0038] Figure 11 yes Figure 1 A schematic diagram of the central base.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Shell; 1a. Cavity; 1b. Flow port; 1c. Wiring channel; 1d. Clearance gap; 1e. Through hole; 11. Cover; 12. Base; 13. Fourth sealing ring; 2. Reflux assembly; 21. Inner liner; 21a. Sterilization chamber; 21b. Heat dissipation chamber; 21c. Flow channel; 211. Reflux seat; 211a. Positioning groove; 212. Heat dissipation seat; 212a. Mounting channel; 212b. Mounting screw hole; 213. Positioning cylinder; 214. Mounting platform; 215. Heat dissipation ring; 216. First sealing ring; 22. Light-transmitting plate; 23. Flow guide tube; 24. Pressure ring; 24a. Slot; 25. Second sealing ring; 26. Third sealing ring; 3. Sterilization light source assembly; 31. Lamp plate base; 32. Ultraviolet lamp bead; 33. Wire; 4. Connecting pipe. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0042] To address the technical problem in existing technologies where extending the water flow under ultraviolet light requires increasing the length of the quartz glass tube and adding an ultraviolet lamp plate and heat sink, resulting in an excessively large module size, this invention provides a flow-through sterilization module. This module can extend the time the water is irradiated by ultraviolet light, improving the sterilization effect. It also removes heat from the sterilization light source components through the water flow. The module has a compact structure, eliminates the need for a separate heat sink, increases integration, and reduces module size.

[0043] Please see Figures 1 to 3 , Figures 1 to 3 This is a schematic diagram of the structure of a flow-through sterilization module in one embodiment of the present invention. The flow-through sterilization module includes a shell 1, a reflux assembly 2, and a sterilization light source assembly 3. The shell 1 has a cavity 1a and a flow port 1b connecting the outside to the cavity 1a. The reflux assembly 2 includes an inner liner 21, a light-transmitting plate 22, and a flow guide tube 23. The inner liner 21 is located in the cavity 1a and has a cavity body. The light-transmitting plate 22 is located in the cavity body and divides the cavity body into a sterilization cavity 21a and a heat dissipation cavity 21b. The sterilization cavity 21a is spherical and has a flow channel 21c connecting the cavity 1a. One end of the flow guide tube 23 is connected to the sterilization cavity 21a, and the other end is located outside the shell 1 and is tangent to the inner wall of the sterilization cavity 21a with at least one of the flow channels 21c. The sterilization light source assembly 3 is placed in the heat dissipation cavity 21b.

[0044] In the flow-through sterilization module provided by this utility model, taking the tangency of the flow channel 21c with the inner wall of the sterilization chamber 21a as an example, water flow can be introduced from the guide port 1b into the cavity 1a of the shell 1 during operation. The water flow can dissipate heat to the part of the inner liner 21 with the heat dissipation cavity 21b, that is, dissipate heat to the sterilization light source component 3, ensuring the heat dissipation effect. The water flow continues to flow and enters the sterilization chamber 21a from the flow channel 21c. At this time, the flow direction of the water flow is tangent to the inner wall of the sterilization chamber 21a. Thus, when the water pressure is constant, backflow can be generated in the spherically arranged sterilization chamber 21a, prolonging the travel distance of the water flow in the sterilization chamber 21a, thereby prolonging the residence time of the water flow in the sterilization chamber 21a. The longer the residence time, the higher the dose of ultraviolet light received by the water flow, improving the sterilization effect. Finally, the purified water flow is discharged from the guide pipe 23.

[0045] When the guide pipe 23 is tangent to the inner wall of the sterilization chamber 21a, water is first introduced into the sterilization chamber 21a through the guide pipe 23. The water can generate backflow in the sterilization chamber 21a. The purified water then enters the container 1a through the flow channel 21c to dissipate heat to the part of the inner liner 21 with the heat dissipation chamber 21b, and finally is discharged from the guide port 1b.

[0046] Thus, this solution extends the travel distance of the water flow within the sterilization chamber 21a by using a spherical sterilization chamber 21a and a tangentially arranged water inlet, thereby extending the time the water flow is irradiated by ultraviolet light, improving the sterilization effect, and carrying away the heat of the sterilization light source component 3 through the water flow. The structure is compact and does not require a separate heat sink, improving integration and reducing module size.

[0047] In one embodiment, the flow channel 21c is tangent to the inner wall of the sterilization chamber 21a; the flow-through sterilization module also includes a connecting pipe 4, which is connected to the guide port 1b and is used to introduce the solution to be purified into the chamber 1a, so that the purified solution is output from the guide pipe 23.

[0048] In this embodiment, the flow channel 21c is tangent to the inner wall of the sterilization chamber 21a, the guide port 1b is used as the water inlet of the module, and the guide pipe 23 is used as the water outlet of the module, thereby improving the heat dissipation capacity of the water flow to the sterilization light source component 3. It should be noted that in this solution, both the flow channel 21c and the guide pipe 23 are tangent to the inner wall of the sterilization chamber 21a.

[0049] In one embodiment, the flow guide 1b is located on the side of the housing 1 near the heat dissipation cavity 21b, and the flow passage 21c is located on the side of the sterilization cavity 21a away from the heat dissipation cavity 21b.

[0050] In this embodiment, the flow port 1b is placed near the heat dissipation cavity 21b of the inner liner 21 so that the water flow entering the cavity 1a can quickly remove the heat from the heat dissipation cavity 21b of the inner liner 21. At the same time, the flow channel 21c is placed away from the heat dissipation cavity 21b of the inner liner 21 to extend the flow path of the water in the cavity 1a and further improve the heat dissipation capacity.

[0051] In one embodiment, please refer to Figure 4 The flow channel 21c and the guide pipe 23 each have a connecting port that connects to the sterilization chamber 21a. The circumferential surface of one of the two connecting ports and the tangent to the inner wall of the sterilization chamber 21a is the first plane, and the other connecting port is located on one side of the first plane.

[0052] In this embodiment, the flow channel 21c and the guide pipe 23 are staggered to prevent the water flowing back through the flow channel 21c from being directly output from the guide pipe 23. Instead, the water flowing into the sterilization chamber 21a from the flow channel 21c can circulate back, further extending the flow path of the water in the sterilization chamber 21a, thereby extending the dose of ultraviolet light received by the water. It should be noted that in this design, the line connecting the flow channel 21c and the guide pipe 23 to the spherical shape of the sterilization chamber 21a is set at a 45° angle.

[0053] In one embodiment, please refer to Figures 5 to 7The inner liner 21 includes a reflux seat 211 and a heat dissipation seat 212. The reflux seat 211 and the heat dissipation seat 212 are detachably connected and each has an inner cavity with an opening on one side, which together enclose the cavity. The sterilization cavity 21a is located on the side of the light-transmitting plate 22 near the reflux seat 211, and the heat dissipation cavity 21b is located on the side of the light-transmitting plate 22 near the heat dissipation seat 212.

[0054] In this embodiment, the inner liner 21 is configured with a detachable reflux seat 211 and a heat sink 212 for easy assembly and regular cleaning, thus improving practicality. It should be noted that in one embodiment, the reflux seat 211 is made of PFTE (polytetrafluoroethylene) to improve its ultraviolet emissivity. Furthermore, the detachable connection between the reflux seat 211 and the heat sink 212 can be achieved through a threaded connection, a snap-fit ​​connection, or other methods.

[0055] In one embodiment, the heat sink 212 is fixed to the inner wall of the housing 1, and the open end of the return seat 211 can cover the open end of the heat sink 212 and is pressed against the heat sink 212 by the inner wall of the housing 1.

[0056] In this embodiment, the return seat 211 is pressed against the heat sink 212 by the housing 1, achieving a detachable connection between the two. The structure is simple and assembly is convenient. To improve the sealing performance between the two, a first sealing ring 216 is provided between the return seat 211 and the heat sink 212. Please refer to... Figure 3 and Figure 8 To ensure that the water flow can flow stably between the cavity 1a and the sterilization cavity 21a, a clearance gap 1d is recessed in the inner wall of the cavity 1a. The clearance gap 1d guides the flow channel 21c to guide the direction of the water flow.

[0057] It should be noted that in this plan, please refer to... Figure 10 and Figure 11 The heat sink 212 is provided with mounting screw holes 212b, and the housing 1 is provided with through holes 1e corresponding to the mounting screw holes 212b. The module also includes mounting bolts, which are screwed into the mounting screw holes 212b through the through holes 1e to realize the installation of the heat sink 212 on the housing 1.

[0058] In addition, in order to improve the heat dissipation capacity of the heat sink 212 for the sterilization light source component 3, the heat sink 212 is provided with a multi-layer heat dissipation ring 215 around its outer periphery. The multi-layer heat dissipation ring 215 is spaced apart along the direction away from the return seat 211 to increase the contact area of ​​the remaining water flow.

[0059] In one embodiment, the opening end of the return seat 211 is recessed with a positioning groove 211a, the positioning groove 211a is connected to the inner cavity of the return seat 211, and the heat sink 212 is provided with a positioning cylinder 213 facing the positioning groove 211a, the positioning cylinder 213 is inserted into the positioning groove 211a.

[0060] In this embodiment, when assembling the inner liner 21, the positioning cylinder 213 is aligned with the positioning groove 211a, and then the reflux seat 211 is pressed against the heat dissipation seat 212 by the housing 1, which further improves the ease of assembly and also improves the sealing performance. In addition, in one embodiment, the reflux seat 211 is configured as two detachable seats, which together form a sterilization chamber 21a when spliced, and a sealing ring is provided between the two seats.

[0061] In one embodiment, please refer to Figure 7 and Figure 9 The heat sink 212 has an installation channel 212a at its open end, which connects to the inner cavity of the heat sink 212 and has an internal thread. An installation platform 214 is provided around its circumference. The light-transmitting plate 22 rests on the installation platform 214. The return flow assembly 2 also includes a pressure ring 24, which has an external thread and is screwed into the installation channel 212a and is located on the side of the light-transmitting plate 22 away from the installation platform 214.

[0062] In this embodiment, the light-transmitting plate 22 is placed on the mounting platform 214 and secured by the pressure ring 24 to achieve stable installation. It should be noted that a second sealing ring 25 is provided between the light-transmitting plate 22 and the mounting platform 214, facilitating the rotation of the pressure ring 24. A slot 24a is provided on the side of the pressure ring 24 away from the mounting platform 214, allowing the pressure ring 24 to be rotated by inserting a pin into the slot 24a. Furthermore, the light-transmitting plate 22 is made of quartz glass, specifically high-purity silicon dioxide refined from synthetic raw materials. This optical quartz glass, produced by electrofusion or hydrogen-free flame melting of synthetic raw materials, can transmit a continuous spectrum from far ultraviolet to near infrared, achieving a transmittance of 92% at an ultraviolet wavelength of 275 nm.

[0063] It should be noted that there are no restrictions on the germicidal light source component 3, as long as it can stably emit ultraviolet light to achieve sterilization. It can be an independent ultraviolet lamp bead 32, an ultraviolet lamp tube, or other forms.

[0064] In one embodiment, the inner liner 21 has a heat dissipation cavity 21b at one end fixed to the housing 1, and the housing 1 has a wiring channel 1c that connects to the heat dissipation cavity 21b; the sterilization light source assembly 3 includes a circuit board, an ultraviolet lamp bead 32 and a wire 33, the circuit board is installed in the heat dissipation cavity 21b, the ultraviolet lamp bead 32 is installed on the circuit board and faces the light-transmitting plate 22, one end of the wire 33 is connected to the circuit board, and the other end extends out of the wiring channel 1c.

[0065] In this embodiment, the wire 33 extends into the heat dissipation cavity 21b via the wiring channel 1c to electrically connect with the circuit board. This ensures both the sealing of the heat dissipation cavity 21b and the normal operation of the ultraviolet lamp beads 32. Specifically, in this design, a third sealing ring 26 is provided around the outer ring of the wiring channel 1c. It should be noted that, in one embodiment, the germicidal light source assembly 3 also includes a lamp base 31, which is made of copper. The circuit board is mounted on the lamp base 31, and multiple ultraviolet lamp beads 32 are arranged in a symmetrical array. Specifically, UV LEDs (ultraviolet light-emitting diodes) are used.

[0066] In one embodiment, the housing 1 includes a cover 11 and a base 12, which are detachably connected and together enclose a cavity 1a.

[0067] In this embodiment, the housing 1 is also configured as a detachable cover 11 and a base 12 to facilitate the maintenance and replacement of internal parts. It should be noted that the cover 11 and base 12 can be detachably connected via snap-fit, bolts, or other methods. In this solution, the cover 11 and base 12 are detachably connected via a threaded connection, and a fourth sealing ring 13 is provided between the cover 11 and base 12.

[0068] To better understand this utility model, the following is combined with... Figures 1 to 11 The technical solution of this utility model is described in detail below:

[0069] The water purification process in this solution is as follows:

[0070] Water is introduced into the cavity 1a of the housing 1 through the connecting pipe 4 and the guide port 1b. The water carries away the heat transferred by the heat sink 212, thereby dissipating heat from the sterilization light source component 3 and ensuring heat dissipation effect. The water continues to flow and enters the sterilization chamber 21a through the clearance gap 1d and the flow channel 21c. At this time, the flow direction of the water is tangential to the inner wall of the sterilization chamber 21a. Therefore, when the water pressure is constant, backflow can be generated in the spherically arranged sterilization chamber 21a, prolonging the water's journey in the sterilization chamber 21a and thus prolonging the water's residence time in the sterilization chamber 21a. The longer the residence time, the higher the dose of ultraviolet light received by the water, improving the sterilization effect. Finally, the purified water is discharged from the guide pipe 23.

[0071] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A flow-through sterilization module, characterized in that, include: The housing has a cavity and a flow port connecting the outside to the cavity; The reflux assembly includes an inner liner, a light-transmitting plate, and a flow guide tube. The inner liner is disposed in the cavity and has a cavity body. The light-transmitting plate is disposed in the cavity body and divides the cavity body into a sterilization cavity and a heat dissipation cavity. The sterilization cavity is spherical and has a flow channel communicating with the cavity body. One end of the flow guide tube is communicating with the sterilization cavity, and the other end is located outside the shell and is tangent to the inner wall of the sterilization cavity along with at least one of the flow channels. and The sterilization light source assembly is placed in the heat dissipation cavity.

2. The flow-through sterilization module according to claim 1, characterized in that, The flow channel is tangent to the inner wall of the sterilization chamber; The flow-through sterilization module also includes a connecting pipe, which connects to the flow port and is used to introduce the solution to be purified into the cavity, so that the purified solution is output from the flow port.

3. The flow-through sterilization module according to claim 2, characterized in that, The flow guide port is located on the side of the housing closer to the heat dissipation cavity, and the flow passage is located on the side of the sterilization cavity away from the heat dissipation cavity.

4. The flow-through sterilization module according to claim 1, characterized in that, The flow channel and the guide pipe each have a connecting port that connects to the sterilization chamber. The circumferential surface of one of the two connecting ports and the tangent to the inner wall of the sterilization chamber is a first plane, and the other connecting port is located on one side of the first plane.

5. The flow-through sterilization module according to claim 1, characterized in that, The inner liner includes a reflux seat and a heat dissipation seat. The reflux seat and the heat dissipation seat are detachably connected and each has an inner cavity with an opening on one side, and together they enclose the cavity. The sterilization chamber is located on the side of the light-transmitting plate near the reflux seat, and the heat dissipation chamber is located on the side of the light-transmitting plate near the heat dissipation seat.

6. The flow-through sterilization module according to claim 5, characterized in that, The heat sink is fixed to the inner wall of the housing, and the opening end of the return seat can cover the opening end of the heat sink and is pressed against the heat sink by the inner wall of the housing.

7. The flow-through sterilization module according to claim 6, characterized in that, The reflux seat has a recessed positioning groove at its open end, the positioning groove communicating with the inner cavity of the reflux seat. The heat sink has a positioning cylinder facing the positioning groove, the positioning cylinder being inserted into the positioning groove; and / or, The inner liner also includes a first sealing ring, which is disposed between the reflux seat and the heat dissipation seat.

8. The flow-through sterilization module according to claim 5, characterized in that, The heat sink has an installation channel at its open end, the installation channel is connected to the inner cavity of the heat sink, and has an internal thread, and has an installation platform around its circumference. The light-transmitting plate is placed on the mounting platform, and the return flow assembly further includes a pressure ring. The pressure ring has an external thread and is screwed into the mounting channel, and is located on the side of the light-transmitting plate away from the mounting platform.

9. The flow-through sterilization module according to claim 1, characterized in that, One end of the inner liner with the heat dissipation cavity is fixed to the outer shell, and the outer shell has a wiring channel communicating with the heat dissipation cavity; The sterilization light source assembly includes a circuit board, ultraviolet lamp beads, and wires. The circuit board is installed in the heat dissipation cavity, the ultraviolet lamp beads are installed on the circuit board and face the light-transmitting plate, and one end of the wire is connected to the circuit board and the other end extends out of the wiring channel.

10. The flow-through sterilization module according to claim 1, characterized in that, The housing includes a cover and a base, the cover and the base being detachably connected and together forming the cavity.

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