A laboratory water purification device

Abstract

This utility model discloses a laboratory water purification device, belonging to the field of water treatment equipment. The device includes a housing with pipes inside. The housing houses interconnected raw water input unit, pretreatment unit, core purification unit, post-treatment unit, and outlet unit. The pretreatment unit includes an activated carbon filter assembly and a softening resin assembly. The core purification unit includes a deionization assembly and an ultrapure water assembly. The post-treatment unit includes an ultraviolet sterilization assembly, a water storage tank, and a circulation pump. Through a complete unit layout constructed within the housing, with the pretreatment unit as the foundation, combined with the dual-path design of the deionization and ultrapure water assemblies in the core purification unit, and using a three-way pipe to switch purification paths according to experimental needs without disassembling the pipes, the device simultaneously meets the water needs of different laboratory scenarios. This eliminates the need to purchase multiple additional units, significantly reducing equipment procurement costs and laboratory space occupancy.

Description

Technical Field

[0001] This utility model relates to the field of water treatment equipment, and in particular to a laboratory water purification device. Background Technology

[0002] In the field of modern scientific research and experimentation, the importance of laboratory water purification equipment is becoming increasingly prominent. Laboratory water has extremely stringent requirements for indicators such as purity, microbial content, and ion concentration. Even slight differences in water quality can have a significant impact on experimental results. To meet these high standards, laboratory water purification equipment is constantly being developed and iterated.

[0003] Most existing technologies can only produce deionized water or ultrapure water, lacking a dual-path purification design. This makes them unsuitable for the diverse water needs of laboratories that simultaneously conduct routine washing and precision instrument analysis. Multiple devices need to be purchased, increasing costs and space requirements. Furthermore, they typically only have a single water quality monitoring point at the outlet, lacking monitoring of key nodes such as the inlet, core purification, and sterilization stages. Problems in intermediate stages are difficult to detect promptly, and there is no linkage and early warning mechanism with the controller. This often results in substandard water already being output to the experimental stage, with abnormal experimental results leading to water quality issues, cell culture contamination, chromatographic data deviations, and experimental failures, increasing the cost of repeated experiments. In addition, many water storage tanks lack a circulating flow design, relying solely on static storage. When the laboratory is in an intermittent water usage scenario, stagnant water in the storage tank easily breeds microorganisms, forming biofilms that adhere to the tank walls and pipes. Subsequent water usage introduces these microorganisms into the experimental system, affecting experimental results. Utility Model Content

[0004] This invention provides a laboratory water purification device that can solve the problem that existing laboratory water purification devices can only produce water and perform single-function testing.

[0005] A laboratory water purification device includes a housing, inside which a pipe for conveying water is provided, and along the pipe inside the housing are sequentially arranged an interconnected raw water input unit, a pretreatment unit, a core purification unit, a post-treatment unit, and an outlet water unit. The pretreatment unit includes an activated carbon filter assembly and a softening resin assembly arranged sequentially along the pipeline. The outlet end of the softening resin assembly is connected to a three-way pipe, and one end of the three-way pipe is connected to the outlet flange of the softening resin assembly. The core purification unit includes a deionization component and an ultrapure water component, which are respectively connected to one end flange of a three-way pipe. The post-treatment unit includes an ultraviolet sterilization component, a water storage tank, and a circulation pump. The outlets of the deionization component and the ultrapure water component are connected to the flange of the ultraviolet sterilization component. The outlet of the ultraviolet sterilization component is connected to the water storage tank. The outlet and inlet of the circulation pump are connected to the inside of the water storage tank.

[0006] Preferably, the raw water input unit includes an inlet solenoid valve and a pre-filter. The inlet end of the inlet solenoid valve is located outside the housing and can be connected to an external water source, while its outlet end is connected to the pre-filter.

[0007] Preferably, the deionization assembly includes a deionization solenoid valve, a deionization water tank, a cation exchange resin, and an anion exchange resin. The inlet of the deionization solenoid valve is connected to a three-way pipe, and the outlet of the deionization solenoid valve is connected to a pipe inside the deionization water tank. The cation exchange resin and anion exchange resin are arranged sequentially along the pipeline inside the deionized water tank.

[0008] Preferably, the ultrapure water assembly includes an ultrapure water solenoid valve, an ultrapure water tank, a high-pressure pump, and a reverse osmosis membrane; The inlet of the ultrapure water solenoid valve is connected to a three-way pipe, and the outlet of the ultrapure water solenoid valve is connected to the inlet flange of the high-pressure pump. The high-pressure pump is fixedly installed at the bottom of the ultrapure water tank, and the outlet of the high-pressure pump is connected to the pipeline inside the ultrapure water tank. The reverse osmosis membrane is fixedly installed inside the pipes of the ultrapure water tank.

[0009] Preferably, the bottom of the deionized water tank and the ultrapure water tank is provided with a guide mechanism; The guiding mechanism includes a slide rail and a slider; The base of the slide rail is fixedly installed inside the bottom of the machine housing; The slider is fixedly installed at the bottom of the ion water tank and the ultrapure water tank, and can slide on the slide rail.

[0010] Preferably, the slide rail is provided with a limiting baffle at one end near the water storage tank, and the side of the housing with the water inlet solenoid valve is provided with a detachable baffle, and the other end of the slide rail is embedded in the detachable baffle of the housing.

[0011] Preferably, the water outlet unit includes a metering solenoid valve and a water flow meter; The outlet of the quantitative solenoid valve is located outside the housing, and its inlet is connected to the water storage tank through a pipe. The water flow meter is located at the inlet end of the quantitative solenoid valve.

[0012] Preferably, a water quality sensor is also provided inside the casing pipe. The water quality sensor is respectively located at the water outlet of the inlet solenoid valve, the water outlet of the anion exchange resin, the water outlet of the reverse osmosis membrane, the water outlet of the ultraviolet sterilization component, and the water inlet of the metering solenoid valve.

[0013] Preferably, a controller is fixedly installed on the side of the housing where the water inlet solenoid valve and the metering solenoid valve are located; The controller is electrically connected to the electronic equipment inside the housing.

[0014] Preferably, the bottom of the housing is provided with casters, which are fixedly installed at the four corners of the bottom of the housing by bolts.

[0015] The beneficial effects of this invention are as follows: By constructing a complete unit layout of "raw water input - pretreatment - core purification - posttreatment - water output" within the casing, with the pretreatment unit as the foundation, combined with the dual-path design of the deionization component and ultrapure water component in the core purification unit, and then flexibly connecting the dual paths to the pretreatment unit through a three-way pipe, the purification path can be switched according to experimental needs without disassembling the pipeline, simultaneously meeting the water needs of different laboratory scenarios, eliminating the need to purchase multiple additional devices, and significantly reducing equipment procurement costs and laboratory space occupation; at the same time, through the linkage of water quality sensors and controllers, in conjunction with ultraviolet sterilization components and circulation pumps, full-process water quality monitoring and sterile water storage are achieved, timely warning of problems such as resin saturation and membrane aging, preventing the output of unqualified water and avoiding experimental failure due to water contamination; in addition, the continuous operation of the circulation pump keeps the water in the storage tank constantly flowing, on the one hand preventing the growth of microorganisms in stagnant water in the storage tank, and on the other hand ensuring the uniformity of water quality in the storage tank, avoiding local water quality fluctuations, making it suitable for intermittent water use scenarios in laboratories. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the water purification equipment in this laboratory; Figure 2 This is a front view of the water purification equipment in this laboratory; Figure 3 A three-dimensional structural diagram of the water purification equipment in this laboratory without its casing; Figure 4 This is an exploded view of the water purification equipment in our laboratory.

[0017] Explanation of reference numerals in the attached figures: 1. Housing; 2. Raw water input unit; 21. Inlet solenoid valve; 22. Pre-filter; 3. Pre-treatment unit; 31. Activated carbon filter assembly; 32. Softening resin assembly; 4. Core purification unit; 41. Deionization assembly; 411. Deionization solenoid valve; 412. Deionized water tank; 413. Cation exchange resin; 414. Anion exchange resin; 42. Ultrapure water assembly; 421. Ultrapure water solenoid valve; 422. Ultrapure water tank; 423. High-pressure pump; 424. Reverse osmosis membrane; 5. Post-treatment unit; 51. Ultraviolet sterilization assembly; 52. Water storage tank; 53. Circulation pump; 6. Outlet unit; 61. Metering solenoid valve; 62. Outlet flow meter; 7. T-connector; 8. Guide mechanism; 81. Slide rail; 82. Slider; 9. Water quality sensor; 10. Controller; 11. Casters. Detailed Implementation

[0018] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0019] like Figures 1 to 4 As shown in the figure, a laboratory water purification device provided by this utility model includes a housing 1. The housing 1 is provided with a pipe for conveying water. The housing 1 is provided with a raw water input unit 2, a pretreatment unit 3, a core purification unit 4, a posttreatment unit 5 and a water outlet unit 6 that are connected to each other in sequence along the pipe. The pretreatment unit 3 includes an activated carbon filter assembly 31 and a softening resin assembly 32 arranged sequentially along the pipeline. The outlet end of the softening resin assembly 32 is connected to a three-way pipe 7, and one end of the three-way pipe 7 is connected to the outlet flange of the softening resin assembly 32. The core purification unit 4 includes a deionization component 41 and an ultrapure water component 42, which are respectively connected to one end flange of the three-way pipe 7. The post-treatment unit 5 includes an ultraviolet sterilization component 51, a water storage tank 52, and a circulation pump 53. The outlets of the deionization component 41 and the ultrapure water component 42 are connected to the flange of the ultraviolet sterilization component 51. The outlet of the ultraviolet sterilization component 51 is connected to the water storage tank 52. The outlet and inlet of the circulation pump 53 are connected to the interior of the water storage tank 52.

[0020] The raw water input unit 2, pretreatment unit 3, core purification unit 4, and post-treatment unit 5, arranged sequentially along the pipeline, form a stepped purification chain. In the pretreatment unit 3, the activated carbon filter component 31 adsorbs residual chlorine, organic matter, and off-colors and odors in the raw water, while the softening resin component 32 removes calcium and magnesium ions to reduce water hardness, preventing scaling and clogging of subsequent components and laying the foundation for deep purification. The core purification unit 4, through a dual-path design of the deionization component 41 and the ultrapure water component 42, can produce deionized water and ultrapure water respectively. The three-way pipe 7 at the outlet of the softening resin component 32 connects the two core purification components through a flange, allowing switching of purification paths according to experimental needs without disassembling the pipeline. This convenient operation avoids cross-contamination of water quality, improves the equipment's applicability, and the ultraviolet sterilization component 51 can destroy the DNA of microorganisms in the water. The structure effectively kills bacteria, viruses, and other microorganisms, preventing experimental results from being affected by microbial contamination of experimental water. The circulating pump 53 circulates the water in the water storage tank 52, preventing the growth of microorganisms in stagnant water and ensuring uniform water quality within the tank, thus avoiding localized water quality fluctuations. This design is suitable for intermittent water use scenarios in laboratories. The pretreatment unit 3, core purification unit 4, and posttreatment unit 5 are connected by flanged pipes, which offer superior sealing performance compared to traditional threaded connections. This effectively prevents equipment short circuits or humid laboratory environments caused by leaks. Furthermore, the flanged connection facilitates disassembly, allowing for subsequent replacement of filter components and maintenance of pipes without damaging the overall structure, reducing maintenance costs and downtime.

[0021] The raw water input unit 2 includes an inlet solenoid valve 21 and a pre-filter 22. The inlet end of the inlet solenoid valve 21 is located outside the housing 1 and can be connected to an external water source. Its outlet end is connected to the pre-filter 22.

[0022] As the first line of defense for raw water entering the equipment, the pre-filter 22 can specifically intercept large particulate impurities in the raw water, preventing such impurities from directly entering the subsequent pretreatment unit 3 and core purification unit 4. If large particulate impurities in the raw water directly contact the activated carbon filter component 31, they can easily clog the pores of the activated carbon, causing its adsorption capacity to drop rapidly and requiring frequent replacement. The pre-filter 22 can filter out impurities in advance, ensuring the adsorption efficiency of the activated carbon component 31 and extending its replacement cycle. For the deion component 41 and ultrapure water component 42 in the core purification unit 4, large particulate impurities may cause blockage and wear, directly affecting the deep purification effect and component life. When the water level in the water storage tank 52 reaches the preset upper limit, the inlet solenoid valve 21 can automatically close to stop the input of raw water. When the water level is lower than the preset lower limit or the user starts the water outage demand, the inlet solenoid valve 21 will automatically open to replenish water. Compared with the traditional continuous water supply or overflow drainage mode, it can avoid the waste caused by excessive input of raw water, and at the same time reduce the ineffective operation of the equipment when there is no water demand, thus reducing the overall energy consumption.

[0023] The deionization assembly 41 includes a deionization solenoid valve 411, a deionization water tank 412, a cation exchange resin 413, and an anion exchange resin 414. The inlet of the deionization solenoid valve 411 is connected to the three-way pipe 7, and the outlet of the deionization solenoid valve 411 is connected to the pipe inside the deionization water tank 412. The cation exchange resin 413 and the anion exchange resin 414 are arranged sequentially along the pipe direction inside the deionized water tank 412.

[0024] The cation exchange resin 413 and anion exchange resin 414, arranged sequentially along the pipeline, follow the purification principle of "removing cations first, then removing anions." The pre-filter cation exchange resin 413 preferentially adsorbs cationic impurities in the raw water and releases them. The subsequent anion exchange resin 414 adsorbs anion impurities in the water and releases O2. The two release With O Combined generation To avoid ion residue caused by a single resin or disordered arrangement, if anion exchange resin 414 is placed first, it may react with Ca in the raw water. Combine to generate CaC Precipitation can block resin pores. This arrangement can improve the resistivity of the effluent, meet the requirements for low ion content in scenarios such as solution preparation, chemical titration, and precision washing of glassware, and avoid ion interference with experimental results. Secondly, one end of the deionization solenoid valve 411 is connected to the three-way pipe 7, and the other end is connected to the deionization water tank 412. When the laboratory needs deionized water, the deionization solenoid valve 411 automatically opens, allowing the pre-treated water to enter the deionization water tank 412. When deionized water is not needed, the deionization solenoid valve 411 closes to prevent water from stagnating in the deionization component 41 for a long time. Compared with the normally open design, this can reduce the ineffective contact between the resin and the water, delay the aging of the resin, and at the same time avoid secondary pollution caused by the accumulation of incompletely purified water in the pipe.

[0025] The ultrapure water assembly 42 includes an ultrapure water solenoid valve 421, an ultrapure water tank 422, a high-pressure pump 423, and a reverse osmosis membrane 424. The inlet of the ultrapure water solenoid valve 421 is connected to the three-way pipe 7, and the outlet of the ultrapure water solenoid valve 421 is connected to the inlet flange of the high-pressure pump 423. The high-pressure pump 423 is fixedly installed at the bottom of the ultrapure water tank 422, and the outlet of the high-pressure pump 423 is connected to the pipe inside the ultrapure water tank 422. The reverse osmosis membrane 424 is fixedly installed inside the pipe of the ultrapure water tank 422.

[0026] The purification principle of the reverse osmosis membrane 424 relies on pressure driving that is higher than the osmotic pressure. The high-pressure pump 423 can increase the inlet water pressure to the optimal working pressure suitable for the reverse osmosis membrane 424 commonly used in laboratories, forcing the pretreated water to pass through the semi-permeable membrane structure of the reverse osmosis membrane 424. The semi-permeable membrane structure of the reverse osmosis membrane 424 can retain more than 99% of ions, microorganisms, organic matter and colloids, solving the problem of small molecule impurities that are difficult to remove by traditional filtration. In addition, the stable pressure output of the high-pressure pump 423 avoids the situation of membrane retention efficiency decrease due to insufficient pressure, ensuring stable outlet water resistivity and meeting experimental requirements. One end of the ultrapure water solenoid valve 421 is connected to the tee pipe 7, and the other end is connected to the high-pressure pump 423 through a flange. When the laboratory needs ultrapure water, the ultrapure water solenoid valve 421 automatically opens, and the pretreated water enters the high-pressure pump 423. When ultrapure water is not needed, the ultrapure water solenoid valve 421 closes to prevent the high-pressure pump 423 from running dry or water from stagnating in the reverse osmosis membrane 424 for a long time. Compared with traditional 24-hour continuous water production ultrapure water equipment, this design can reduce ineffective operating time, reduce the energy consumption of the high-pressure pump 423, and at the same time avoid the membrane fouling caused by long-term immersion of the reverse osmosis membrane 424 in static water, thus extending the membrane replacement cycle.

[0027] The bottom of the deionized water tank 412 and the ultrapure water tank 422 are provided with a guide mechanism 8; The guide mechanism 8 includes a slide rail 81 and a slider 82; The base of the slide rail 81 is fixedly installed at the bottom of the inner casing 1; The slider 82 is fixedly installed at the bottom of the ion water tank 412 and the ultrapure water tank 422, and can slide on the slide rail 81.

[0028] The deionized water tank 412 requires regular replacement of the ion exchange resin, and the ultrapure water tank 422 requires regular maintenance of the high-pressure pump 423 and replacement of the reverse osmosis membrane 424. If a traditional water tank is fixed in place, such as with bolts directly fixed inside the casing 1, maintenance requires disassembling the surrounding pipes, removing the fixing bolts, and then manually moving the water tank, which is cumbersome and time-consuming. The guide mechanism 8's slide rail 81 and slider 82 work together to allow the water tank to be directly pulled out of the casing 1 along the slide rail 81. Maintenance only requires closing the corresponding solenoid valve and disconnecting the flange connection between the water tank and the pipe; the water tank can then be moved by the slider. The water tank is pulled out of the casing 1 along the slide rail 81 by slide 82. There is no need to move or disassemble a large number of parts. After maintenance, the water tank can be quickly reset by pushing it back along the slide rail 81. The maintenance time is greatly shortened, reducing the workload of laboratory personnel and reducing equipment downtime. The guiding effect of the slide rail 81 restricts the water tank to move only in a fixed direction, avoiding lateral deviation during transportation. At the same time, the large contact area between the slider 82 and the slide rail 81 can distribute the weight of the water tank and prevent jamming or tilting caused by uneven local force during sliding, ensuring safe and controllable maintenance operation.

[0029] The slide rail 81 is provided with a limiting baffle at one end near the water storage tank 52, and the housing 1 is provided with a detachable baffle on one side where the water inlet solenoid valve 21 is located. The other end of the slide rail 81 is embedded in the detachable baffle of the housing 1.

[0030] The water outlet unit 6 includes a metering solenoid valve 61 and a water outlet flow meter 62; The outlet end of the quantitative solenoid valve 61 is located outside the housing 1 and is on the same side as the inlet solenoid valve 21. Its inlet end is connected to the water storage tank 52 through a pipe. The water flow meter 62 is located at the inlet end of the quantitative solenoid valve 61.

[0031] Laboratory experiments require extremely high precision in water volume control. Traditional water purification equipment is mostly manually operated, requiring manual measurement with beakers and measuring cylinders, which is not only time-consuming but also prone to errors due to operating habits. The quantitative solenoid valve 61 can automatically control the valve opening and opening and closing time after being triggered by preset water volume, achieving on-demand volume control. Furthermore, when the laboratory needs to process samples in batches, the quantitative solenoid valve 61 can be set to a cyclic quantitative mode, eliminating the need for manual start-stop or measurement each time, greatly reducing repetitive work for laboratory personnel and improving the efficiency of batch experiments. The opening of the quantitative solenoid valve 61 is dynamically adjusted according to the actual flow rate fed back by the outlet flow meter 62. If the inlet flow rate decreases due to the drop in water level in the water storage tank 52, the valve opening can be increased to ensure that the final outlet volume still meets the preset value and avoid quantitative deviation caused by flow fluctuation. The outlet flow meter 62 can be set to a normal flow range. When the flow rate is detected to be outside the range, an alarm will be triggered and the quantitative solenoid valve 61 or the inlet solenoid valve 21 can be closed in conjunction. The machine will stop in time when the pipeline is blocked to prevent the circulating pump 53 from running dry and being damaged due to insufficient water intake, or the water storage tank 52 from leaking due to excessive pressure.

[0032] The casing 1 is also equipped with a water quality sensor 9 inside the pipe. The water quality sensor 9 is respectively located at the outlet of the inlet solenoid valve 21, the outlet of the anion exchange resin 414, the outlet of the reverse osmosis membrane 424, the outlet of the ultraviolet sterilization component 51, and the inlet of the metering solenoid valve 61.

[0033] The water quality sensor 9, located at the outlet end of the inlet solenoid valve 21, can detect key indicators of the raw water in real time. If the turbidity of the raw water exceeds the standard, the filtration strategy of the pre-filter 22 can be strengthened to prevent large particles of impurities from clogging the subsequent activated carbon filter component 31. If the residual chlorine content is too high, it can prompt the activated carbon filter component 31 of the pretreatment unit 3 to be replaced in advance to prevent the core purification component 4 from being affected. The water quality sensor 9, located at the outlet of the anion exchange resin 414, primarily detects the resistivity of the effluent. Under normal circumstances, the resistivity of the water treated by the cation exchange resin 413 and the anion exchange resin 414 should reach 1. ~1 Ω cm; if water quality sensor 9 detects a resistivity drop to 1 cm; Ω If the water level is below cm, it indicates that the resin is close to saturation. You should promptly suggest replacing the resin to avoid producing substandard deionized water, which could interfere with the normal progress of the experiment. The water quality sensor 9, located at the outlet of the reverse osmosis membrane 424, primarily monitors the water's resistivity and total organic carbon content. The target of the reverse osmosis membrane 424 is to produce water with a resistivity ≥18.2 MΩ. If ultrapure water (cm) is detected by water quality sensor 9 with a resistivity below 17 MΩ, the water quality sensor will detect a resistivity of less than 17 MΩ. cm, which may be due to membrane pore blockage or membrane aging of reverse osmosis membrane 424, can trigger an alarm to prevent substandard ultrapure water purity from affecting precision experiments; The water quality sensor 9, located at the outlet of the ultraviolet sterilization component 51, mainly detects the activity of microorganisms in the water. The goal of ultraviolet sterilization is to control the number of microbial colonies to <1 CFU / mL. If the water quality sensor 9 detects that the number of colonies exceeds the standard after sterilization, it may be due to the attenuation of the ultraviolet lamp power or the excessive water flow rate. The ultraviolet lamp power can be adjusted or the water flow rate can be reduced to ensure that the water entering the water storage tank 52 is sterile and avoid experimental failure due to microbial contamination. The water quality sensor 9, located at the inlet of the metering solenoid valve 61, mainly detects indicators such as resistivity, microorganisms, and TOC. If the water quality fails to meet the standards due to contamination of the water storage tank 52 or secondary contamination of the pipeline, the metering solenoid valve 61 can be immediately triggered and closed to prevent the output of substandard water. This is especially useful for high-cost water types such as ultrapure water, as it can prevent ineffective water output and reduce waste of water resources and consumables.

[0034] A controller 10 is fixedly installed on one side of the housing 1, which is equipped with a water inlet solenoid valve 21 and a metering solenoid valve 61. The controller 10 is electrically connected to the electronic equipment inside the housing 1.

[0035] The controller 10 achieves an integrated layout of "water source connection - parameter setting - water intake operation", reducing personnel movement, facilitating real-time observation of equipment status and parameter adjustment, and reducing operational errors. At the same time, it is electrically connected to all electronic devices in the housing 1 to build an automated operation closed loop. It can connect various functional units to work together, support multiple sets of experimental water parameters preset and one-click call, adapt to diverse needs, and can also centrally collect water quality, operating parameters and consumable status data to achieve visualized management and control of equipment status. Through intelligent fault diagnosis, it can quickly locate problems and respond automatically, shortening repair time and reducing maintenance costs.

[0036] The bottom of the housing 1 is provided with casters 11, which are fixedly installed at the four corners of the bottom of the housing 1 by bolts.

[0037] In summary, the laboratory water purification equipment provided by this utility model embodiment allows for the following process: During use, an external water source is first connected to the inlet solenoid valve 21 outside the casing 1. The controller 10 determines whether to activate the water supply based on the water level in the storage tank 52. If the water level is below a preset lower limit, the inlet solenoid valve 21 automatically opens. The raw water first passes through the pre-filter 22 to intercept large particulate impurities, and then enters the pretreatment unit 3. In the pretreatment unit 3, the raw water first passes through the activated carbon filter assembly 31 to adsorb residual chlorine, organic matter, and off-colors and odors, and then passes through the softening resin assembly 32 to remove calcium and magnesium ions to reduce water hardness and prevent scaling in subsequent components. The treated water passes through the flange-connected three-way pipe 7. The controller 10 controls the corresponding solenoid valve to open according to the required water quality type for the experiment. If deionized water is required, the deionization solenoid valve 411 is activated, and the water enters the deionized water tank 412, passing sequentially through the cation exchange resin 413 and anion exchange resin 414 along the pipeline. With O The generated water undergoes deionization purification. If ultrapure water is required, the ultrapure water solenoid valve 421 is activated, and water enters the high-pressure pump 423 at the bottom of the ultrapure water tank 422 via a flange connection. The high-pressure pump 423 pressurizes the water to the optimal working pressure of the reverse osmosis membrane 424, forcing the water to pass through the membrane module and retaining over 99% of ions, microorganisms, and small organic molecules, thus completing ultrapure water purification. Both purified waters enter the post-treatment unit 5, where they first pass through the ultraviolet sterilization component 51 to destroy microbial DNA and kill bacteria and viruses, before flowing into the storage tank 52. The circulation pump 53 continuously circulates the water in the storage tank 52 to prevent stagnant water from breeding microorganisms and ensure uniform water quality. When researchers need to collect water, they set the outlet parameters via the controller 10 on the same side, and the metering solenoid valve 61 opens. The water flow in the storage tank 52 is monitored in real-time by the outlet flow meter 62, and the controller 10 dynamically adjusts the valve opening based on the flow data. To ensure accurate quantification, the water quality sensor 9 at the inlet of the quantitative solenoid valve 61 performs a final water quality check. If the water meets the standards, it is successfully output to the outside of the casing 1 for experimental use. Throughout the process, the water quality sensor 9 at each node transmits water quality data to the controller 10 in real time. If water quality exceeds the standard or flow rate is abnormal, the controller 10 immediately triggers an alarm. The deionized water tank 41 and the ultrapure water tank 42 can be pulled out and maintained via the slide rail 81 and slider 82 of the bottom guide mechanism 8. The universal wheels 11 at the bottom of the casing 1 facilitate equipment movement. The entire process is automated and intelligently controlled without the need for extensive manual intervention.

[0038] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A laboratory water purification apparatus comprising a housing (1) in which a conduit for conveying water is provided, characterised in that: The casing (1) is provided with a series of interconnected raw water input unit (2), pretreatment unit (3), core purification unit (4), posttreatment unit (5) and water outlet unit (6) along the pipeline inside the casing (1). The pretreatment unit (3) includes an activated carbon filter assembly (31) and a softening resin assembly (32) arranged sequentially along the pipeline. The outlet end of the softening resin assembly (32) is connected to a three-way pipe (7), and one end of the three-way pipe (7) is connected to the outlet flange of the softening resin assembly (32). The core purification unit (4) includes a deionization component (41) and an ultrapure water component (42), which are respectively connected to one end flange of the three-way pipe (7); The post-treatment unit (5) includes an ultraviolet sterilization component (51), a water storage tank (52), and a circulation pump (53). The outlet of the deionization component (41) and the ultrapure water component (42) is connected to the flange of the ultraviolet sterilization component (51). The outlet of the ultraviolet sterilization component (51) is connected to the water storage tank (52). The outlet and inlet of the circulation pump (53) are connected to the inside of the water storage tank (52).

2. A laboratory water purification apparatus as claimed in claim 1, characterized in that: The raw water input unit (2) includes an inlet solenoid valve (21) and a pre-filter (22). The inlet end of the inlet solenoid valve (21) is located outside the housing (1) and can be connected to an external water source. Its outlet end is connected to the pre-filter (22).

3. A laboratory water purification apparatus as claimed in claim 1, characterized in that: The deionization assembly (41) includes a deionization solenoid valve (411), a deionization water tank (412), a cation exchange resin (413), and an anion exchange resin (414). The inlet of the deionization solenoid valve (411) is connected to the three-way pipe (7), and the outlet of the deionization solenoid valve (411) is connected to the pipe inside the deionization water tank (412). The cation exchange resin (413) and anion exchange resin (414) are arranged sequentially along the pipeline direction inside the deionized water tank (412).

4. A laboratory water purification apparatus as claimed in claim 3, characterized in that: The ultrapure water assembly (42) includes an ultrapure water solenoid valve (421), an ultrapure water tank (422), a high-pressure pump (423), and a reverse osmosis membrane (424). The inlet end of the ultrapure water solenoid valve (421) is connected to the three-way pipe (7), and the outlet end of the ultrapure water solenoid valve (421) is connected to the inlet flange of the high-pressure pump (423). The high-pressure pump (423) is fixedly installed at the bottom of the ultrapure water tank (422), and the outlet of the high-pressure pump (423) is connected to the pipe inside the ultrapure water tank (422). The reverse osmosis membrane (424) is fixedly installed inside the pipe of the ultrapure water tank (422).

5. A laboratory water purification apparatus as claimed in claim 4, characterized in that: The bottom of the deionized water tank (412) and the ultrapure water tank (422) are provided with a guide mechanism (8); The guiding mechanism (8) includes a slide rail (81) and a slider (82); The base of the slide rail (81) is fixedly installed at the bottom of the housing (1); The slider (82) is fixedly installed at the bottom of the deionized water tank (412) and the ultrapure water tank (422), and can slide on the slide rail (81).

6. A laboratory water purification apparatus as claimed in claim 5, characterised in that: The slide rail (81) is provided with a limiting baffle at one end near the water storage tank (52), and the housing (1) is provided with a detachable baffle on one side of the water inlet solenoid valve (21). The other end of the slide rail (81) is embedded in the detachable baffle of the housing (1).

7. A laboratory water purification apparatus as claimed in claim 1, characterized in that: The water outlet unit (6) includes a metering solenoid valve (61) and a water outlet flow meter (62). The outlet of the quantitative solenoid valve (61) is located outside the housing (1) and is on the same side as the inlet solenoid valve (21). Its inlet is connected to the water storage tank (52) through a pipe. The water flow meter (62) is located at the inlet end of the quantitative solenoid valve (61).

8. A laboratory water purification apparatus as claimed in claim 1, characterized in that: The casing (1) is also equipped with a water quality sensor (9) inside the pipe. The water quality sensor (9) is respectively located at the outlet of the inlet solenoid valve (21), the outlet of the anion exchange resin (414), the outlet of the reverse osmosis membrane (424), the outlet of the ultraviolet sterilization component (51), and the inlet of the metering solenoid valve (61).

9. A laboratory water purification apparatus as claimed in claim 1, characterized in that: A controller (10) is fixedly installed on one side of the housing (1) which is equipped with a water inlet solenoid valve (21) and a metering solenoid valve (61). The controller (10) is electrically connected to the electronic equipment inside the housing (1).

10. A laboratory water purification apparatus as claimed in claim 1, characterized in that: The bottom of the housing (1) is provided with casters (11), which are fixedly installed at the four corners of the bottom of the housing (1) by bolts.

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