Front disinfection assembly for ultrapure water instrument in laboratory

Abstract

The invention discloses a pre-disinfection assembly for an ultrapure water instrument in a laboratory, which belongs to the technical field of water treatment of ultrapure water machines and comprises an ultrapure water instrument, a pre-disinfection mechanism mounted on the side surface of the ultrapure water instrument and a control circuit board arranged in the pre-disinfection mechanism, the device is characterized in that the control circuit board is used for processing data and making corresponding instructions, and the front disinfection mechanism comprises a shell, a water pipe, a mixing chamber, an ozone generator, an air pump, an ultraviolet germicidal lamp and a water quality sensor. Through the technologies of combination of multiple disinfection means, intelligent monitoring and control, air filtration, pollution prevention and the like, microorganisms are prevented from breeding and continuously breeding in a device in front of the disinfection part of the ultrapure water instrument, adverse effects on a membrane are avoided, the subsequent treatment burden is reduced, the water quality safety of the finally obtained ultrapure water is effectively guaranteed, and the service life of the ultrapure water instrument is prolonged. And a reliable water source guarantee is provided for scientific research and experiments in a laboratory.

Description

Technical Field

[0001] The invention relates to the technical field of water treatment of ultrapure water machines, in particular to a pre-disinfection component for laboratory ultrapure water instruments. Background Art

[0002] At present, ultrapure water is one of the indispensable and very important basic raw materials in modern industry. It has a wide range of uses in the fields of electronics, electricity, chemistry, medicine, biology, information, etc., especially in laboratories in various fields, where high requirements are placed on the quality of ultrapure water. Laboratory ultrapure water machine is a laboratory water purification equipment, which removes all solid impurities, salts, bacteria and viruses in water through filtration, reverse osmosis, ultraviolet sterilization and other methods. Laboratory ultrapure water machine can usually produce pure water and ultrapure water.

[0003] After searching, the document with publication number CN114477487A discloses a laboratory ultrapure water machine with multi-stage purification and filtration functions, in which the pretreatment part is strengthened according to the characteristics of tap water, and the tap water is fully filtered and adsorbed through the PP cotton filter, activated carbon filter, KDF composite filter and ultrafiltration membrane filter in the pretreatment device, thereby reducing the operating burden of the subsequent treatment device.

[0004] However, in the above-mentioned prior art, the pretreatment part does not have a disinfection function and fails to effectively treat microorganisms (such as bacteria, viruses, etc.) in tap water. These microorganisms may multiply and continue to grow in the device between the pretreatment part and the subsequent disinfection part, resulting in deterioration of water quality. In addition, microorganisms and their metabolites may attach to key components of subsequent treatment devices such as RO reverse osmosis membranes, causing membrane contamination and blockage, shortening the service life of the membrane, and increasing operating costs. At the same time, as the microorganisms multiply and continue to grow, the subsequent disinfection part is burdened with heavy operations, which in turn affects the treatment effect, making it difficult to guarantee the quality of the ultrapure water finally obtained. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides the following technical solutions: a pre-disinfection assembly for a laboratory ultrapure water instrument, comprising an ultrapure water instrument, a pre-disinfection mechanism installed on the side of the ultrapure water instrument, and a control circuit board arranged in the pre-disinfection mechanism, characterized in that: the controlled circuit board is used to process data and make corresponding instructions, the pre-disinfection mechanism comprises a shell, a water pipe, a mixing chamber, an ozone generator, an air pump, an ultraviolet sterilization lamp and a water quality sensor, and the ozone generator, the air pump, the ultraviolet sterilization lamp, and the water quality sensor are all electrically connected to the control circuit board through wires; Among them, the ultraviolet sterilization lamp is kept on at all times to irradiate the water pipes, the water quality sensor monitors the water quality entering the ultrapure water instrument and transmits the signal to the control circuit board, the control circuit board inputs the preset value monitored by the water quality sensor, the control circuit board compares the monitoring data with the preset value and controls the opening and closing of the ozone generator and the air pump.

[0006] As a preferred technical solution of the present invention, the shell is installed on the side of the ultrapure water instrument, the ozone generator, the air pump and the control circuit board are all fixedly installed on the inner wall of the shell, the mixing chamber is connected between the air pump, the water pipe and the water source pipe, the end of the water pipe away from the mixing chamber is connected to the water inlet of the ultrapure water instrument, and the water quality sensor is installed in the water pipe and close to the water inlet of the ultrapure water instrument.

[0007] As a preferred technical solution of the present invention, a filter assembly is provided at the bottom of the shell, and the filter assembly includes a mounting cylinder fixedly connected to the bottom of the shell, an air pipe is connected between the mounting cylinder and the air inlet of the ozone generator, a circular ring is fixedly connected inside the mounting cylinder, and a plurality of mounting seats are installed on the circular ring by bolts, and an isolation net, an activated carbon adsorption layer, a HEPA filter plate and a fan are installed in sequence inside the plurality of mounting seats arranged from the bottom of the shell toward the air pipe, and the fan is electrically connected to the control circuit board through a wire.

[0008] As a preferred technical solution of the present invention, a first sealing ring is embedded in the outer ring of each mounting seat, and the first sealing ring contacts the inner wall of the mounting seat to achieve sealing. Second sealing rings are embedded on both sides of each mounting seat, and the second sealing rings achieve sealing between the mounting seats or between the mounting seats and the ring.

[0009] As a preferred technical solution of the present invention, the mixing chamber is respectively connected with pipe openings I, II and III, the pipe opening I is connected to the air outlet end of the air pump, and an electric control valve and a partition are sequentially arranged in the pipe opening I from the air pump to the mixing chamber, the electric control valve is electrically connected to the control circuit board through a wire, a rotating shaft is rotatably arranged on the partition, one end of the rotating shaft is fixedly sleeved with an impeller located between the partition and the electric control valve, and the other end of the rotating shaft extends into the mixing chamber and is fixedly sleeved with a vortex fan.

[0010] As a preferred technical solution of the present invention, the partition is provided with a plurality of through holes distributed in an array along the circumference of the rotating shaft, each of the through holes is fixedly connected with a microporous diffuser plate, and the microporous diffuser plate is a fan-shaped porous ceramic material component.

[0011] As a preferred technical solution of the present invention, the pipe mouth II is connected to a water source pipeline, the pipe mouth III is connected to one end of a water pipe, the axis of the pipe mouth I does not coincide with the axis of an air pump outlet, the mixing chamber is a hollow truncated cone structure, the pipe mouth II and the pipe mouth III are distributed in an array along the circumference of the mixing chamber, and the axes of the pipe mouth II and the pipe mouth III are staggered with the center of the mixing chamber.

[0012] As a preferred technical solution of the present invention, a mounting plate is installed on the top of the shell by screws, the ultraviolet germicidal lamp is fixedly installed on the mounting plate, the water pipe is made of specially designed ultraviolet transmissive material, and the water pipe is spirally arranged from top to bottom along the outside of the ultraviolet germicidal lamp.

[0013] As a preferred technical solution of the present invention, a microcontroller MCU, an ADC module and a solid-state relay SSR are provided on the control circuit board. The ADC module is provided with an ADC pin. The water quality sensor is connected to the ADC pin and the ADC module converts the analog signal output by the water quality sensor into a digital signal for processing by the microcontroller MCU. The digital IO port of the microcontroller MCU outputs a control signal to the solid-state relay SSR. The switch port of the solid-state relay SSR is connected to the ozone generator, the air pump, the fan and the ultraviolet sterilization lamp. The microcontroller MCU is responsible for receiving the acquired data and comparing it with the preset standard value, and controlling the solid-state relay SSR to turn on and off the ozone generator, the air pump and the fan through logical judgment. The normally closed contact of the relay connected to the ultraviolet sterilization lamp is used to control the switch. The microcontroller MCU can ensure that the ultraviolet lamp is always on through the solid-state relay SSR.

[0014] As a preferred technical solution of the present invention, the water quality sensor can monitor a variety of data, and the UV-C band of the ultraviolet germicidal lamp is in the range of 200-280 nanometers.

[0015] Compared with the prior art, the present invention can achieve the following beneficial effects: 1. The pre-disinfection mechanism is equipped with a water quality sensor to monitor the water quality entering the ultrapure water instrument in real time and transmit the data to the microcontroller MCU. By comparing with the preset values, it automatically determines whether it is necessary to start additional disinfection measures such as the ozone generator, air pump and fan. When the water quality meets the standard, the ultraviolet sterilization lamp can be used for disinfection alone; when the water quality exceeds the preset standard, the control system automatically starts ozone disinfection and gas-liquid mixing to ensure that the water quality always remains in the ideal range.

[0016] 2. It combines ultraviolet sterilization, ozone disinfection and gas-liquid mixing technology, which can effectively disinfect water at different stages. The ultraviolet sterilization lamp continuously emits ultraviolet rays to ensure that bacteria, viruses and other microorganisms in the water source are completely killed; and the coordinated work of the ozone generator and the air pump diffuses the ozone molecules evenly into the water through the vortex fan and the microporous diffusion plate, thereby improving the dissolution efficiency and disinfection effect of ozone; this dual disinfection mechanism greatly enhances the sterilization ability of the water source and ensures that the water quality of ultrapure water reaches higher standards.

[0017] 3. External air is inhaled through the fan and processed through multi-stage filtration components such as isolation net, activated carbon adsorption layer, HEPA filter plate, etc. to ensure that the air entering the ozone generator is clean and avoid pollutants in the air affecting the effect of the ozone generator. In addition, the efficient HEPA filter layer can effectively remove dust, pollen, bacteria and viruses in the air, improve air quality, and further enhance the disinfection effect of ozone.

[0018] 4. Pre-disinfection can effectively prevent the accumulation and reproduction of microorganisms and their metabolites on various components inside the ultrapure water instrument, especially key components such as RO reverse osmosis membrane, avoid microbial contamination of the membrane surface, reduce the risk of membrane contamination and blockage, and improve the operating efficiency and service life of subsequent treatment devices. The operating burden of the subsequent disinfection part is also reduced, so that the subsequent treatment effect is guaranteed, thereby ensuring the water quality of the final ultrapure water. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the overall three-dimensional structure provided by the present invention; Figure 2 A schematic diagram of the three-dimensional structure of the pre-disinfection mechanism provided by the present invention; Figure 3 A schematic diagram of the internal structure of the housing provided by the present invention; Figure 4 An exploded schematic diagram of the structure inside the installation tube provided by the present invention; Figure 5 A partial cross-sectional schematic diagram of a mixing chamber provided by the present invention; Figure 6 An exploded schematic diagram of the mixing chamber structure provided by the present invention; Figure 7 A schematic diagram of the workflow provided by the present invention.

[0020] Among them: 1. Ultrapure water instrument; 2. Control circuit board; 3. Shell; 4. Water pipe; 5. Mixing chamber; 51. Pipe mouth I; 52. Pipe mouth II; 53. Pipe mouth III; 54. Electric control valve; 55. Partition; 56. Rotating shaft; 57. Impeller; 58. Vortex fan; 59. Through hole; 510. Microporous diffusion plate; 6. Ozone generator; 7. Air pump; 8. Ultraviolet germicidal lamp; 9. Water quality sensor; 10. Filter assembly; 101. Mounting cylinder; 102. Air pipe; 103. Ring; 104. Mounting seat; 105. Isolation net; 106. Activated carbon adsorption layer; 107. HEPA filter plate; 108. Fan; 109. First sealing ring; 1010. Second sealing ring; 11. Mounting plate. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0022] Example: like Figure 1 - Figure 7 As shown, this embodiment proposes a pre-disinfection assembly for a laboratory ultrapure water instrument, including an ultrapure water instrument 1, a pre-disinfection mechanism installed on the side of the ultrapure water instrument 1, and a control circuit board 2 arranged in the pre-disinfection mechanism, characterized in that: the controlled circuit board 2 is used to process data and make corresponding instructions, the pre-disinfection mechanism includes a housing 3, a water pipe 4, a mixing chamber 5, an ozone generator 6, an air pump 7, an ultraviolet sterilization lamp 8 and a water quality sensor 9, and the ozone generator 6, the air pump 7, the ultraviolet sterilization lamp 8, and the water quality sensor 9 are all electrically connected to the control circuit board 2 through wires; Among them, the ultraviolet sterilization lamp 8 is kept on to irradiate the water pipe 4, the water quality sensor 9 monitors the water quality entering the ultrapure water instrument 1 and transmits the signal to the control circuit board 2, the water quality sensor 9 input into the control circuit board 2 monitors the preset value, the control circuit board 2 compares the monitoring data with the preset value and controls the opening and closing of the ozone generator 6 and the air pump 7; The control circuit board 2 is provided with a microcontroller MCU, an ADC module and a solid-state relay SSR. The ADC module is provided with an ADC pin. The water quality sensor 9 is connected to the ADC pin and the ADC module converts the analog signal output by the water quality sensor 9 into a digital signal for processing by the microcontroller MCU. The digital IO port of the microcontroller MCU outputs a control signal to the solid-state relay SSR. The switch port of the solid-state relay SSR is connected to the ozone generator 6, the air pump 7, the fan 108 and the ultraviolet sterilization lamp 8. The microcontroller MCU is responsible for receiving the acquired data and comparing it with the preset standard value, and controlling the solid-state relay SSR to open and close the ozone generator 6, the air pump 7 and the fan 108 through logical judgment. The normally closed contact of the relay connected to the ultraviolet sterilization lamp 8 is used to control the switch. The microcontroller MCU can ensure that the ultraviolet lamp is always on through the solid-state relay SSR.

[0023] In the present invention, preferably, the shell 3 is installed on the side of the ultrapure water instrument 1, the ozone generator 6, the air pump 7 and the control circuit board 2 are all fixedly installed on the inner wall of the shell 3, the mixing chamber 5 is connected between the air pump 7, the water pipe 4 and the water source pipeline, the end of the water pipe 4 away from the mixing chamber 5 is connected to the water inlet of the ultrapure water instrument 1, and the water quality sensor 9 is installed in the water pipe 4 and close to the water inlet of the ultrapure water instrument 1.

[0024] In the present invention, preferably, a filter assembly 10 is provided at the bottom of the housing 3, and the filter assembly 10 includes a mounting cylinder 101 fixedly connected to the bottom of the housing 3, an air pipe 102 is connected between the mounting cylinder 101 and the air inlet of the ozone generator 6, a circular ring 103 is fixedly connected inside the mounting cylinder 101, and a plurality of mounting seats 104 are installed on the circular ring 103 by bolts, and a plurality of mounting seats 104 arranged from the bottom of the housing 3 to the direction of the air pipe 102 are sequentially installed inside with an isolation net 105, an activated carbon adsorption layer 106, a HEPA filter plate 107 and a fan 108, and the fan 108 is electrically connected to the control circuit board 2 through a wire; Specifically, the fan 108 draws outside air into the mounting tube 101, and the air is processed by the isolation net 105, the activated carbon adsorption layer 106 and the HEPA filter plate 107 in sequence. The air is initially filtered by the isolation net 105, and then the small particles in the air are filtered by the activated carbon adsorption layer 106. Then, the dust, pollen, bacteria, viruses and other pollutants in the air are efficiently filtered out by the HEPA filter plate, and the removal efficiency of particles larger than 0.3 microns can reach more than 99.97%.

[0025] In the present invention, preferably, a first sealing ring 109 is embedded in the outer ring of each mounting seat 104, and the first sealing ring 109 contacts the inner wall of the mounting seat 104 to achieve sealing. A second sealing ring 1010 is embedded on both sides of each mounting seat 104, and the second sealing ring 1010 achieves sealing between the mounting seats 104 or between the mounting seats 104 and the ring 103; Specifically, the first sealing ring 109 and the second sealing ring 1010 are used to seal between the mounting seats 104 and 104, between the mounting seats 104 and the ring 103, and between the mounting seats 104 and the mounting tube 101, ensuring that the air sucked in by the fan 108 can be processed by the isolation net 105, the activated carbon adsorption layer 106 and the HEPA filter plate 107 in sequence.

[0026] In the present invention, preferably, the mixing chamber 5 is connected with a pipe port Ⅰ51, a pipe port Ⅱ52 and a pipe port Ⅲ53 respectively, the pipe port Ⅰ51 is connected to the air outlet end of the air pump 7, and an electric control valve 54 and a partition 55 are sequentially arranged in the pipe port Ⅰ51 from the air pump 7 to the mixing chamber 5, the electric control valve 54 is electrically connected to the control circuit board 2 through a wire, and a rotating shaft 56 is rotatably arranged on the partition 55, one end of the rotating shaft 56 is fixedly sleeved with an impeller 57 located between the partition 55 and the electric control valve 54, and the other end of the rotating shaft 56 extends into the mixing chamber 5 and is fixedly sleeved with a vortex fan 58; Specifically, the gas and water flow discharged by the air pump 7 act on the impeller 57 and the vortex fan 58 respectively, causing the vortex fan 58 to rotate for stirring, achieving gas-liquid mixing and dissolving ozone with high efficiency to obtain the best mixing effect, thereby improving the efficiency and effect of ozone disinfection on water.

[0027] In the present invention, preferably, the partition plate 55 is provided with a plurality of through holes 59 distributed in an array along the circumference of the rotating shaft 56, and each through hole 59 is fixedly connected with a microporous diffuser plate 510, and the microporous diffuser plate 510 is a fan-shaped porous ceramic material component; Specifically, the ozone gas discharged by the air pump 7 can pass through the microporous diffusion plate 510. When the ozone gas passes through the diffusion plate, the gas will diffuse into the water through the tiny pores on the plate. In this process, the gas molecules are evenly dispersed in the water to form tiny bubbles, which greatly increases the contact area between the gas and the water. This helps to accelerate the dissolution process of the gas in the water and improve the dissolution efficiency, thereby improving the efficiency and effect of ozone disinfection of water.

[0028] In the present invention, preferably, the pipe port II 52 is connected to the water source pipeline, the pipe port III 53 is connected to one end of the water pipe 4, the axis of the pipe port I 51 does not coincide with the axis of the air outlet of the air pump 7, the mixing chamber 5 is a hollow truncated cone structure, the pipe ports II 52 and the pipe ports III 53 are distributed in an array along the circumference of the mixing chamber 5, and the axis of the pipe ports II 52 and the pipe ports III 53 are staggered with the center of the mixing chamber 5; Specifically, the axis of the pipe port I51 does not coincide with the axis of the air outlet of the air pump 7, so the exhaust of the air pump 7 can impact the impeller 57, facilitating the rotation of the impeller 57. The axis of the pipe port II52 and the pipe port III53 are staggered with the center of the mixing chamber 5, so when water flow is introduced into the mixing chamber 5, the water flow can impact the vortex fan 58 to cause it to rotate.

[0029] In the present invention, preferably, a mounting plate 11 is installed on the top of the housing 3 by screws, the ultraviolet germicidal lamp 8 is fixedly installed on the mounting plate 11, the water pipe 4 is made of a specially designed ultraviolet transmissive material, and the water pipe 4 is spirally arranged from top to bottom along the outer side of the ultraviolet germicidal lamp 8; Specifically, the water pipe 4 is usually made of a specially designed ultraviolet transmissive material, such as quartz glass, which has a high transmittance to ultraviolet rays. Due to its excellent ultraviolet transmittance, it is often used as a light-transmitting component of ultraviolet disinfection equipment. Therefore, even if water is set inside the water pipe 4, ultraviolet rays can penetrate the wall of the water pipe 4 and effectively disinfect the water inside. The spiral arrangement of the water pipe 4 increases the length of the water flow path to ensure that the water in the water pipe 4 is adequately irradiated with ultraviolet rays and fully disinfected.

[0030] In the present invention, preferably, the water quality sensor 9 can monitor a variety of data, and the UV-C band of the ultraviolet germicidal lamp 8 is in the range of 200-280 nanometers; Specifically, ultraviolet rays in the UV-C band of 200-280 nanometers have a strong killing effect on microorganisms, and can destroy the DNA or RNA of microorganisms, causing them to be unable to replicate or repair normally, thereby effectively killing or inactivating them, with a good killing effect.

[0031] Specific principles: First, tap water is connected to the mixing chamber 5 from the water source pipeline, and then flows into the ultrapure water instrument 1 through the water pipe 4. During this process, the ultraviolet sterilization lamp 8 in the normally open state emits ultraviolet rays in the UV-C band of 200-280 nanometers through the water pipe 4 to irradiate the tap water flowing through the water pipe 4, which can destroy the DNA or RNA of microorganisms in the water, causing them to be unable to replicate or repair normally, thereby effectively killing or inactivating them, with a good killing effect, and achieving disinfection of tap water; Secondly, the water quality sensor 9 monitors the water quality entering the ultrapure water instrument 1 and transmits the signal to the microcontroller MCU. The water quality sensor 9 inputs a preset value to monitor the microcontroller MCU. When the monitoring result does not exceed the preset value, it is only necessary to keep the ultraviolet sterilization lamp 8 always on for sterilization; when the monitoring result exceeds the preset value, the microcontroller MCU controls the ozone generator 6, the air pump 7, the fan 108 and the electric control valve 54 to turn on. The fan 108 draws the outside air into the installation cylinder 101 and passes through the isolation net 105, the activated carbon adsorption layer 106 and the HEPA filter plate 107 for treatment in turn. The treated gas is transmitted to the odor generator 6 through the gas pipe 102. Oxygen generator 6, ozone generator 6 makes oxygen molecules form ozone, air pump 7 pressurizes and delivers ozone gas to pipe port I 51, ozone gas can impact impeller 57 to drive vortex fan 58 to rotate through rotating shaft 56, at the same time, when water flow is introduced into mixing chamber 5, water flow can impact vortex fan 58 to make vortex fan 58 rotate rapidly, when ozone gas passes through diffusion plate, diffusion plate disperses ozone gas into fine bubbles, fine bubbles are mixed with water under the stirring of vortex fan 58, and the efficiency of dissolving ozone is high, so that ozone is fully mixed with water flow to achieve the efficiency and effect of water disinfection, and then cooperate with the disinfection of ultraviolet germicidal lamp 8 to fully kill microorganisms in tap water; In summary, it is possible to prevent microorganisms from multiplying and continuing to grow in the device before the disinfection part of the ultrapure water instrument 1, and effectively prevent microorganisms and their metabolites from attaching to key components of subsequent treatment devices such as RO reverse osmosis membranes, causing membrane contamination and blockage, avoiding adverse effects on the membrane, and reducing the operating burden of the subsequent disinfection part, so that the subsequent treatment effect is guaranteed, thereby ensuring the water quality of the ultrapure water finally obtained.

[0032] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above implementation regulations. The above implementation regulations and descriptions are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A pre-disinfection assembly for a laboratory ultrapure water instrument, comprising an ultrapure water instrument (1), a pre-disinfection mechanism installed on the side of the ultrapure water instrument (1), and a control circuit board (2) arranged in the pre-disinfection mechanism, characterized in that: The controlled circuit board (2) is used to process data and issue corresponding instructions. The pre-disinfection mechanism comprises a housing (3), a water pipe (4), a mixing chamber (5), an ozone generator (6), an air pump (7), an ultraviolet sterilization lamp (8) and a water quality sensor (9). The ozone generator (6), the air pump (7), the ultraviolet sterilization lamp (8) and the water quality sensor (9) are all electrically connected to the control circuit board (2) via wires. The ultraviolet sterilization lamp (8) is kept on to irradiate the water pipe (4), the water quality sensor (9) monitors the water quality entering the ultrapure water instrument (1) and transmits the signal to the control circuit board (2), the control circuit board (2) inputs the preset value monitored by the water quality sensor (9), and the control circuit board (2) compares the monitoring data with the preset value and controls the opening and closing of the ozone generator (6) and the air pump (7).

2. A pre-disinfection assembly for a laboratory ultrapure water instrument according to claim 1, characterized in that: The housing (3) is mounted on the side of the ultrapure water meter (1); the ozone generator (6), the air pump (7) and the control circuit board (2) are all fixedly mounted on the inner wall of the housing (3); the mixing chamber (5) is connected between the air pump (7), the water pipe (4) and the water source pipe; one end of the water pipe (4) away from the mixing chamber (5) is connected to the water inlet of the ultrapure water meter (1); and the water quality sensor (9) is mounted in the water pipe (4) and close to the water inlet of the ultrapure water meter (1).

3. A pre-disinfection assembly for a laboratory ultrapure water instrument according to claim 1, characterized in that: A filter assembly (10) is arranged at the bottom of the housing (3), and the filter assembly (10) comprises a mounting cylinder (101) fixedly connected to the bottom of the housing (3); an air supply pipe (102) is connected between the mounting cylinder (101) and the air inlet of the ozone generator (6); a circular ring (103) is fixedly connected inside the mounting cylinder (101); a plurality of mounting seats (104) are mounted on the circular ring (103) by means of bolts; an isolation net (105), an activated carbon adsorption layer (106), a HEPA filter plate (107) and a fan (108) are sequentially mounted inside the plurality of mounting seats (104) arranged from the bottom of the housing (3) toward the air supply pipe (102); and the fan (108) is electrically connected to the control circuit board (2) by means of a wire.

4. A pre-disinfection assembly for a laboratory ultrapure water instrument according to claim 3, characterized in that: A first sealing ring (109) is embedded in the outer ring of each mounting seat (104), and the first sealing ring (109) contacts the inner wall of the mounting seat (104) to achieve sealing. Second sealing rings (1010) are embedded on both sides of each mounting seat (104), and the second sealing rings (1010) achieve sealing between the mounting seats (104) or between the mounting seats (104) and the ring (103).

5. The pre-disinfection assembly for a laboratory ultrapure water instrument according to claim 1, characterized in that: The mixing chamber (5) is connected to a pipe port I (51), a pipe port II (52) and a pipe port III (53) respectively. The pipe port I (51) is connected to the air outlet of the air pump (7), and an electric control valve (54) and a partition (55) are arranged in sequence in the pipe port I (51) from the air pump (7) to the mixing chamber (5). The electric control valve (54) is electrically connected to the control circuit board (2) through a wire. The partition (55) is rotatably provided with a rotating shaft (56). One end of the rotating shaft (56) is fixedly sleeved with an impeller (57) located between the partition (55) and the electric control valve (54), and the other end of the rotating shaft (56) extends into the mixing chamber (5) and is fixedly sleeved with a vortex fan (58).

6. A pre-disinfection assembly for a laboratory ultrapure water instrument according to claim 5, characterized in that: The partition plate (55) is provided with a plurality of through holes (59) distributed in an array along the circumference of the rotating shaft (56), and a microporous diffusion plate (510) is fixedly connected to each of the through holes (59), wherein the microporous diffusion plate (510) is a fan-shaped porous ceramic material component.

7. A pre-disinfection assembly for a laboratory ultrapure water instrument according to claim 5, characterized in that: The pipe port II (52) is connected to a water source pipeline, the pipe port III (53) is connected to one end of a water pipe (4), the axis of the pipe port I (51) does not coincide with the axis of an air outlet of the air pump (7), the mixing chamber (5) is a hollow truncated cone-shaped structure, the pipe ports II (52) and the pipe ports III (53) are distributed in an array along the circumference of the mixing chamber (5), and the axis of the pipe ports II (52) and the pipe ports III (53) are staggered with the center of the mixing chamber (5).

8. The pre-disinfection assembly for a laboratory ultrapure water instrument according to claim 1, characterized in that: A mounting plate (11) is mounted on the top of the housing (3) by means of screws, the ultraviolet germicidal lamp (8) is fixedly mounted on the mounting plate (11), the water pipe (4) is made of a specially designed ultraviolet transmissive material, and the water pipe (4) is arranged in a spiral shape from top to bottom along the outer side of the ultraviolet germicidal lamp (8).

9. The pre-disinfection assembly for a laboratory ultrapure water instrument according to claim 3, characterized in that: The control circuit board (2) is provided with a microcontroller MCU, an ADC module and a solid-state relay SSR. The ADC module is provided with an ADC pin. The water quality sensor (9) is connected to the ADC pin and the ADC module converts the analog signal output by the water quality sensor (9) into a digital signal for processing by the microcontroller MCU. The digital IO port of the microcontroller MCU outputs a control signal to the solid-state relay SSR. The switch port of the solid-state relay SSR is connected to the ozone generator (6), the air pump (7), the fan (108) and the ultraviolet sterilization lamp (8). The microcontroller MCU is responsible for receiving the acquired data and comparing it with a preset standard value, and controlling the solid-state relay SSR to turn on and off the ozone generator (6), the air pump (7) and the fan (108) through logical judgment. The normally closed contact of the relay connected to the ultraviolet sterilization lamp (8) is used to control the switch. The microcontroller MCU can ensure that the ultraviolet lamp is always on through the solid-state relay SSR.

10. The pre-disinfection assembly for a laboratory ultrapure water instrument according to claim 1, characterized in that: The water quality sensor (9) can monitor a variety of data, and the UV-C band of the ultraviolet sterilization lamp (8) is in the range of 200-280 nanometers.

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