An in-line ultraviolet sterilization device

Abstract

An in-flow type ultraviolet sterilization device, comprising a cylinder body, an inlet is provided at the upper end of the cylinder body, an outlet is provided at the lower end of the cylinder body, at least one sterilization unit is arranged in the cavity of the cylinder body, the sterilization unit includes a heat dissipation base, a UVC-LED lamp group, a light-transmitting member, and a rectifying cylinder. A convex water flow dispersion cone is arranged in the middle of the upper end of the heat dissipation base, and a plurality of water passing holes are arranged around the water flow dispersion cone. A rectifying cylinder is arranged at the lower end of the heat dissipation base, the rectifying cylinder is in the shape of a frustum of a cone with a smaller upper part and a larger lower part, and a plurality of rectifying holes are arranged on the cylinder wall of the rectifying cylinder. The upper end of the rectifying cylinder is fixedly connected to the heat dissipation base, and the outer circumference of the lower end is attached to the inner wall of the cylinder body, so that an in-flow area is formed between the outer side of the rectifying cylinder and the inner wall of the cylinder body. The inner cavity of the rectifying cylinder is communicated with the water passing holes through the rectifying holes and the in-flow area. The UVC-LED lamp group is installed at the lower end of the heat dissipation base, and a light-transmitting member is arranged between the UVC-LED lamp group and the rectifying cylinder. The water of the UVC-LED lamp group and the rectifying cylinder is isolated through the light-transmitting member, so that the ultraviolet light energy of the UVC-LED lamp group can pass through the light-transmitting member and irradiate the water flowing through the cavity of the rectifying cylinder for sterilization.

Description

Technical Field

[0001] The present invention relates to the technical field of water sterilization, and particularly to a flow-through ultraviolet sterilization device. Background Art

[0002] Deep ultraviolet refers to light with a wavelength of 200nm - 280nm, also known as UVC. Deep ultraviolet can penetrate the cell membranes and nuclei of microorganisms, destroy genetic materials such as DNA and RNA, and achieve the effect of killing microorganisms. Deep ultraviolet can kill bacteria, spores, viruses, fungi, etc. As a highly efficient spectral sterilization method, it is widely used in water purification plants, hospitals, factories, schools, etc.

[0003] Currently, mercury lamps are usually used as ultraviolet light sources in existing deep ultraviolet sterilization devices. However, with the implementation of the Minamata Convention on Mercury, the production and use restrictions on mercury-containing products are becoming increasingly strict. Therefore, ultraviolet mercury lamps will surely be phased out gradually. And among the few deep ultraviolet sterilization devices using UVC-LED as the ultraviolet light source, they can only sterilize low-flow fluids. Therefore, the existing UVC-LED sterilization devices are difficult to be applied in water treatment plants to sterilize medium- and high-flow water, and there is an urgent need for a sterilization device for medium- and high-flow fluids. Summary of the Invention

[0004] The purpose of the present invention is to provide a flow-through ultraviolet sterilization device aiming at the deficiencies of the prior art, which can achieve ultraviolet sterilization through UVC-LED and complete the sterilization treatment of medium- and high-flow water.

[0005] The technical solution of the present invention is: a flow-through ultraviolet sterilization device, including a cylinder body. An inlet is provided at the upper end of the cylinder body, and an outlet is provided at the lower end of the cylinder body. At least one sterilization unit is arranged in the cavity of the cylinder body. The sterilization unit includes a heat dissipation base, a UVC-LED lamp group, a light-transmitting member, and a rectifying cylinder. A convex water flow dispersion cone is arranged in the middle of the upper end of the heat dissipation base, and a plurality of water passing holes are arranged around the water flow dispersion cone. A rectifying cylinder is arranged at the lower end of the heat dissipation base. The rectifying cylinder is in the shape of a frustum with a smaller upper part and a larger lower part. A number of rectifying holes are arranged on the cylinder wall of the rectifying cylinder. The upper end of the rectifying cylinder is fixedly connected to the heat dissipation base, and the outer circumference of the lower end is attached to the inner wall of the cylinder body, so that an over-flow area is formed between the outer side of the rectifying cylinder and the inner wall of the cylinder body. The inner cavity of the rectifying cylinder is communicated with the water passing holes through the rectifying holes and the over-flow area. The UVC-LED lamp group is installed at the lower end of the heat dissipation base, and a light-transmitting member is arranged between the UVC-LED lamp group and the rectifying cylinder to isolate the UVC-LED lamp group and the rectifying cylinder through the light-transmitting member, so that the ultraviolet light energy of the UVC-LED lamp group can pass through the light-transmitting member and irradiate the water flowing through the cavity of the rectifying cylinder for sterilization.

[0006] Furthermore, a flow dividing cavity with an upward cavity opening is provided at the upper end of the heat dissipation base. The water flow dispersion cone is located at the center of the flow dividing cavity, and the water passing holes are arranged around the water flow dispersion cone at the bottom of the flow dividing cavity.

[0007] Furthermore, an installation groove with a downward groove opening is provided at the lower end of the heat dissipation base. The bottom of the installation groove is fixedly connected to a lamp board by screws. A lead hole is provided on the heat dissipation base, and a through hole corresponding to the lead hole is provided on the cylinder body, so that the leads of the lamp board are led out through the lead hole and the through hole. The UVC-LED lamp group is welded and fixed to the lower end surface of the lamp board, and the rectifying cylinder is threadedly fitted at the groove opening of the installation groove.

[0008] Furthermore, the water flow dispersion cone is a triangular pyramid.

[0009] Furthermore, an upper end cover is threadedly connected to the upper end of the cylinder body, the water inlet is arranged on the upper end cover, a lower end cover is threadedly connected to the lower end of the cylinder body, and the water outlet is arranged on the lower end cover.

[0010] Furthermore, the heat dissipation base is in interference fit with the inside of the cylinder body and is fixedly connected to the cylinder body by screws.

[0011] Furthermore, a sealing ring is provided between the heat dissipation base and the cylinder body.

[0012] Furthermore, the rectifying holes gradually increase from top to bottom along the cylinder wall of the rectifying cylinder.

[0013] Furthermore, two or more sterilization units are arranged inside the cylinder body, and a water flow space is left between adjacent two sterilization units.

[0014] Adopting the above technical solution: When this sterilization device is in use, the fluid to be sterilized enters the cavity of the cylinder from the water inlet, and then under the irradiation of the UVC-LED lamp group of the sterilization unit, the purpose of ultraviolet sterilization is achieved. The water flow dispersion cone provided on the heat dissipation base of the sterilization unit can disperse the impact force of the high-pressure straight-flow fluid, enabling the fluid to be sterilized to flow stably and uniformly towards the flow-through area, reducing the flow rate of the fluid, and making the fluid dispersed around flow into the cavity of the rectifying cylinder through the rectifying holes. The ultraviolet rays emitted by the UVC-LED lamp group irradiate and sterilize. The upper end of the rectifying cylinder corresponds to the light-transmitting component, and the lower end fits with the inner wall of the cylinder, which can concentrate all the fluid to be sterilized within the irradiation range of the UVC-LED, while preventing the fluid to be sterilized from leaking through the gap between the rectifying cylinder and the cylinder, ensuring that all the fluid can flow through the irradiation range of the ultraviolet light, improving the sterilization effect, and then entering the next sterilization unit for sterilization again until all sterilization is completed and flowing out from the water outlet. This sterilization device has a simple structure, adopts a UVC-LED lamp group, can achieve ultraviolet sterilization of high-flow fluids, will not cause environmental pollution, and can be provided with multiple sterilization units according to the actual needs of customers to improve the sterilization effect. Each sterilization unit is independent of each other, facilitating later maintenance. This sterilization device can also take away the heat generated during the operation of the UVC-LED lamp group through the fluid flowing through the heat dissipation base, playing a role in heat dissipation and temperature reduction, ensuring that the UVC-LED lamp group can operate stably for a long time and improving the service life of the UVC-LED lamp group.

[0015] A diversion cavity with an upward-facing cavity opening is provided at the upper end of the heat dissipation base. The water flow dispersion cone is located at the center of the diversion cavity. The water passing holes are arranged around the water flow dispersion cone at the bottom of the diversion cavity, providing a buffer area for the fluid to be sterilized to enter the flow-through area, enabling the fluid to flow into the flow-through area for rectification at a uniform speed and ensuring the sterilization effect.

[0016] An installation groove with a downward-facing notch is provided at the lower end of the heat dissipation base. A lamp board is fixedly connected to the bottom of the installation groove by screws. A lead hole is provided on the heat dissipation base, and a through hole corresponding to the lead hole is provided on the cylinder, enabling the leads of the lamp board to be led out through the lead hole and the through hole. The UVC-LED lamp group is welded and fixed to the lower end face of the lamp board. Through the lead hole and the through hole, the air pressure and temperature in the installation groove can be kept balanced with the outside, preventing water mist from generating on the light-transmitting component, ensuring the light-transmitting effect, and enabling the ultraviolet light energy to continuously and stably sterilize the fluid. The rectifying cylinder is thread-fitted at the notch of the installation groove, preventing the impact force of the fluid from affecting the stability of the rectifying cylinder and ensuring the connection reliability.

[0017] The water flow dispersion cone is a triangular pyramid, and the impact force of the high-flow fluid is buffered by the apex of the triangular pyramid, reducing the flow rate of the fluid and enabling the fluid to enter the flow-through area evenly and stably.

[0018] The upper end of the cylinder body is threadedly connected with an upper end cover, the water inlet is arranged on the upper end cover, the lower end of the cylinder body is threadedly connected with a lower end cover, and the water outlet is arranged on the lower end cover. After the sterilization unit is assembled in the cylinder body, the upper end cover and the lower end cover can be assembled. The assembly is simple and the later maintenance is convenient.

[0019] The heat dissipation seat is in interference fit in the cylinder body and is fixedly connected to the cylinder body by screws, and the assembly is simple and reliable.

[0020] A sealing ring is arranged between the heat dissipation seat and the cylinder body to improve the waterproof sealing performance between the heat dissipation seat and the cylinder body.

[0021] The rectifying holes increase sequentially from top to bottom along the cylinder wall of the rectifying cylinder, so that the number of rectifying holes on the same circumference of the rectifying cylinder is the same, ensuring the rectifying effect.

[0022] Two or more sterilization units are arranged in the cylinder body, and a water flow space is left between adjacent two sterilization units, so that each sterilization unit has sufficient sterilization space and makes full use of the ultraviolet light of each sterilization unit.

[0023] The present invention will be further described below in conjunction with the accompanying drawings of the specification and specific embodiments. Description of the Drawings

[0024] Figure 1 is a schematic structural diagram of the present invention;

[0025] Figure 2 is a schematic structural diagram of the heat dissipation seat of the present invention;

[0026] Figure 3 is a schematic structural diagram of the mounting groove of the heat dissipation seat of the present invention. Detailed Embodiments

[0027] See Figures 1 to 3, an embodiment of a flow-through ultraviolet sterilization device, comprising a cylinder body 1, with a water inlet 2-1 provided at the upper end of the cylinder body 1 and a water outlet 3-1 provided at the lower end of the cylinder body 1. A upper end cover 2 is threadedly connected to the upper end of the cylinder body 1, and the water inlet 2-1 is provided on the upper end cover 2. A lower end cover 3 is threadedly connected to the lower end of the cylinder body 1, and the water outlet 3-1 is provided on the lower end cover 3, which is convenient for assembling the sterilization unit inside the cylinder body 1. Both the upper end cover 2 and the lower end cover 3 adopt detachable threaded connections, with simple and reliable assembly and more convenient later maintenance. At least one sterilization unit 12 is arranged in the cavity of the cylinder body 1, and the sterilization unit 12 includes a heat dissipation seat 4, a UVC-LED lamp group 5, a light-transmitting member 6, and a rectifying cylinder 7. The heat dissipation seat 4 is press-fitted into the cylinder body 1 and is fixedly connected to the cylinder body 1 by screws, with simple and reliable assembly, avoiding the impact of fluid on the stability of the heat dissipation seat 4. A sealing ring 13 is arranged between the heat dissipation seat 4 and the cylinder body 1 to improve the waterproof and sealing performance between the heat dissipation seat 4 and the cylinder body 1. A protruding water flow dispersion cone 8 is arranged in the middle of the upper end of the heat dissipation seat 4, and the water flow dispersion cone 8 is a triangular pyramid. The impact force of high-flow fluid can be buffered through the apex of the triangular pyramid, reducing the fluid flow rate, enabling the fluid to enter the flow-through area 10 evenly and stably, avoiding poor sterilization effect caused by too large or uneven fluid flow rate. Similarly, the water flow dispersion cone 8 can also adopt structures such as a quadrangular pyramid or a pentagonal pyramid. A plurality of water passing holes 9 are arranged around the water flow dispersion cone 8, enabling the fluid to enter the flow-through area 10 as soon as possible, avoiding excessive accumulation of fluid at the water inlet end of the cylinder body 1, and taking away the heat generated by the UVC-LED lamp group 5 through the continuous flow of the fluid, playing a role in heat dissipation and temperature reduction. A rectifying cylinder 7 is arranged at the lower end of the heat dissipation seat 4. The rectifying cylinder 7 is in the shape of a frustum of a cone with a smaller upper part and a larger lower part. A number of rectifying holes 7-1 are arranged on the cylinder wall of the rectifying cylinder 7. The upper end of the rectifying cylinder 7 is fixedly connected to the heat dissipation seat 4, and the outer circumference of the lower end is attached to the inner wall of the cylinder body 1, preventing fluid from leaking through the gap between the rectifying cylinder 7 and the cylinder body 1, forming a flow-through area 10 between the outside of the rectifying cylinder 7 and the inner wall of the cylinder body 1, reserving a flow-through space for the fluid. The rectifying holes 7-1 gradually increase from top to bottom along the cylinder wall of the rectifying cylinder 7, and the number of rectifying holes 7-1 on the same circumference of the rectifying cylinder 7 is the same, enabling the fluid to flow into the cavity of the rectifying cylinder 7 orderly, ensuring that the fluid is concentrated in the central area of the cylinder body 1. The inner cavity of the rectifying cylinder 7 is communicated with the water passing holes 9 through the rectifying holes 7-1 and the flow-through area 10. The UVC-LED lamp group 5 is installed at the lower end of the heat dissipation seat 4, and a light-transmitting member 6 is arranged between the UVC-LED lamp group 5 and the rectifying cylinder 7. The light-transmitting member 6 can be made of quartz glass material, and the light-transmitting member 6 and the heat dissipation seat 4 can be fixed by bonding. The UVC-LED lamp group 5 and the rectifying cylinder 7 are isolated through the light-transmitting member 6, enabling the ultraviolet light energy of the UVC-LED lamp group 5 to pass through the light-transmitting member 6 to irradiate the water flowing through the cavity of the rectifying cylinder 7 for sterilization, and preventing the fluid in the rectifying cylinder 7 from affecting the normal power-on of the UVC-LED lamp group 5.

[0028] The heat dissipation base 4 of this sterilization device can also adopt the following structure. A diversion chamber 4-1 with an upward-facing cavity opening is provided at the upper end of the heat dissipation base 4. The water flow dispersion cone 8 is located at the center of the diversion chamber 4-1. The water passing holes 9 are arranged around the water flow dispersion cone 8 at the bottom of the diversion chamber 4-1, providing a buffer area for the fluid to enter the flow-through area 10, enabling the fluid to flow into the flow-through area at a uniform speed for rectification, ensuring the sterilization effect, increasing the cavity section at the water inlet end of the cylinder body 1, and preventing excessive accumulation of the fluid. An installation groove 4-2 with a downward-facing notch is provided at the lower end of the heat dissipation base 4. A lamp board 11 is fixedly connected to the bottom of the installation groove 4-2 by screws. A lead hole 4-3 is provided on the heat dissipation base 4, and a through hole 1-1 corresponding to the lead hole 4-3 is provided on the cylinder body 1, so that the leads of the lamp board 11 are led out through the lead hole 4-3 and the through hole 1-1. The UVC-LED lamp group 5 is welded and fixed to the lower end surface of the lamp board 11. Through the lead hole 4-3 and the through hole 1-1, the air pressure and temperature in the installation groove 4-2 can be kept balanced with the outside, preventing water mist from forming on the light-transmitting member 6, ensuring the light-transmitting effect, and enabling the ultraviolet light energy to continuously and stably sterilize the fluid. The UVC-LED lamp group 5 is composed of several UVC-LED lamp beads arranged in a ring or matrix on the lamp board 11. The rectification cylinder 7 is threadedly fitted to the notch of the installation groove 4-2, preventing the impact force of the fluid from affecting the stability of the rectification cylinder 7 and ensuring the connection reliability.

[0029] When two or more sterilization units 12 are provided in the cylinder body 1, a water flow space is left between adjacent two sterilization units 12, so that each sterilization unit 12 has sufficient sterilization space and makes full use of the ultraviolet light of each sterilization unit 12.

[0030] When this sterilization device is in use, the fluid to be sterilized enters the cavity of the cylinder body 1 from the water inlet 2-1. First, the impact force of the high-pressure straight-through fluid is dispersed by the water flow dispersion cone 8 on the heat dissipation base 4 of the sterilization unit, reducing the flow rate of the fluid to be sterilized, enabling the fluid to be sterilized to flow stably and uniformly from the water passing holes 9 to the flow-through area 10, and then passing through the rectification cylinder 7 to make the fluid dispersed around flow into the inner cavity of the rectification cylinder 7 from the rectification holes 7-1 and concentrate within the ultraviolet light irradiation range of the UVC-LED lamp group. The ultraviolet light emitted by the UVC-LED lamp group irradiates the fluid to be sterilized through the light-transmitting member 6 for sterilization, thus completing the sterilization of one sterilization unit 12. When there are multiple sterilization units 12 in the cylinder body 1, the fluid sequentially enters the next sterilization unit 12 for sterilization until all sterilization units 12 have completed sterilization, and the fluid flows out from the water outlet, achieving the purpose of ultraviolet sterilization.

[0031] This sterilization device has a simple structure. By using the UVC-LED lamp group 5, it can achieve ultraviolet sterilization for high-flow fluids, without causing environmental pollution. Moreover, multiple sterilization units can be set according to the actual needs of customers to improve the sterilization effect. Since the structures of the individual sterilization units are the same and independent of each other, they can be mass-produced, reducing production costs and facilitating later maintenance. This sterilization device can also take away the heat generated during the operation of the UVC-LED lamp group 5 when the continuously flowing fluid passes through the heat dissipation base 4, playing a role in heat dissipation and temperature reduction, ensuring that the UVC-LED lamp group 5 can operate stably for a long time and increasing the service life of the UVC-LED lamp group 5.

Claims

1. An over-flow type ultraviolet sterilization device, comprising a cylinder body (1), wherein a water inlet (2-1) is arranged at the upper end of the cylinder body (1), and a water outlet (3-1) is arranged at the lower end of the cylinder body (1), and it is characterized in that: At least one sterilization unit (12) is arranged in the cavity of the cylinder body (1). The sterilization unit (12) includes a heat dissipation seat (4), a UVC-LED lamp group (5), a light-transmitting member (6), and a rectifying cylinder (7). A convex water flow dispersion cone (8) is arranged in the middle of the upper end of the heat dissipation seat (4). A plurality of water passing holes (9) are arranged around the water flow dispersion cone (8). A rectifying cylinder (7) is arranged at the lower end of the heat dissipation seat (4). The rectifying cylinder (7) is in the shape of a frustum with a smaller upper part and a larger lower part. A plurality of rectifying holes (7-1) are arranged on the cylinder wall of the rectifying cylinder (7). The upper end of the rectifying cylinder (7) is fixedly connected to the heat dissipation seat (4), and the outer circumference of the lower end is attached to the inner wall of the cylinder body (1), so that an over-flow area (10) is formed between the outer side of the rectifying cylinder (7) and the inner wall of the cylinder body. The inner cavity of the rectifying cylinder (7) is communicated with the water passing holes (9) through the rectifying holes (7-1) and the over-flow area (10). The rectifying holes (7-1) increase in sequence from top to bottom along the cylinder wall of the rectifying cylinder (7). The UVC-LED lamp group (5) is installed at the lower end of the heat dissipation seat (4). A light-transmitting member (6) is arranged between the UVC-LED lamp group (5) and the rectifying cylinder (7). The UVC-LED lamp group (5) and the rectifying cylinder (7) are isolated by the light-transmitting member (6), so that the ultraviolet light energy of the UVC-LED lamp group (5) passes through the light-transmitting member (6) to irradiate the water flow flowing through the inner cavity of the rectifying cylinder (7) for sterilization. A diversion cavity (4-1) with an upward cavity opening is arranged at the upper end of the heat dissipation seat (4). The water flow dispersion cone (8) is located at the center of the diversion cavity (4-1). The water passing holes (9) are arranged around the water flow dispersion cone (8) at the bottom of the diversion cavity (4-1). The water flow dispersion cone (8) is a triangular pyramid. A plurality of sterilization units (12) are arranged in the cylinder body (1), and a water flow space is left between two adjacent sterilization units (12).

2. The flow-through ultraviolet sterilization device according to claim 1, characterized in that: An installation groove (4-2) with a downward groove opening is arranged at the lower end of the heat dissipation seat (4). A lamp board (11) is fixedly connected to the bottom of the installation groove (4-2) by screws. A lead hole (4-3) is arranged on the heat dissipation seat (4). A through hole (1-1) corresponding to the lead hole (4-3) is arranged on the cylinder body (1), so that the lead of the lamp board (11) is led out through the lead hole (4-3) and the through hole (1-1). The UVC-LED lamp group (5) is welded and fixed to the lower end face of the lamp board (11). The rectifying cylinder (7) is threadedly fitted to the groove opening of the installation groove (4-2).

3. The flow-through ultraviolet sterilization device according to claim 1, wherein: An upper end cover (2) is threadedly connected to the upper end of the cylinder body (1). The water inlet (2-1) is arranged on the upper end cover (2). A lower end cover (3) is threadedly connected to the lower end of the cylinder body (1). The water outlet (3-1) is arranged on the lower end cover (3).

4. The flow-through ultraviolet sterilization device according to claim 1, wherein: The heat dissipation seat (4) is in interference fit in the cylinder body (1) and is connected and fixed to the cylinder body (1) by screws.

5. The flow-through ultraviolet sterilization device according to claim 1, wherein: A sealing ring (13) is arranged between the heat dissipation seat (4) and the cylinder body (1).

Images