On-site detection device for water sample of water purifier

Abstract

An on-site detection device for a water sample of a water purifier is characterized in that the detection device comprises a telescopic clean room and a test suite which can be arranged in the clean room and is used for on-site detection of the water sample, the clean room comprises at least two suite rooms which are sequentially shrunk from outside to inside and can be connected with each other in a telescopic mode, and the two suite rooms are connected with each other in a telescopic mode. The adjacent sleeve chambers are connected in a sealed mode after being completely unfolded. The clean room has the advantages that the telescopic clean room with a multi-layer sleeve room structure is adopted, and the clean room can be conveniently folded, transported and assembled and disassembled on site, so that a water sample collected from the water purification equipment can be subjected to culture of on-site bacterial colony test in the first time, and the water sample is effectively prevented from going bad.

Description

Technical Field

[0001] The utility model relates to a water sample testing device, in particular to an on-site detection device for water samples of a water purifier. Background Art

[0002] With the improvement of living standards, people have higher and higher requirements for the quality of drinking water. In order to filter out floating objects, heavy metals, bacteria, microorganisms and other impurities in the water that are harmful to the human body, various water purifiers have come into being. Water purifiers are water treatment equipment that deeply filters and purifies water according to the requirements of water use.

[0003] At present, commercial water purifiers are mostly used in hospitals, schools, high-speed rail stations, and airport terminals. During the use of commercial water purifiers, people are required to regularly take water from the purifier for colony testing to detect whether the colonies in the water are within the standard range to ensure the safety of public drinking water.

[0004] The traditional testing method involves collecting water samples on-site and then transporting them to the company's laboratory via a vehicle for colony testing. However, due to the long distance between the sampling site and the company's laboratory or designated testing agency, the testing time can easily exceed the specified time limit. Furthermore, the water samples may be improperly stored during transportation, which can easily lead to contamination from the intermediate environment and the risk of excessive colony counts. If the test result indicates excessive colony counts, it is difficult to determine whether the water quality itself is substandard or a problem occurred during transportation. This necessitates repeated water sampling and colony testing, and may even require the cost of commissioning third-party testing, placing a significant financial burden on the company.

[0005] Therefore, the existing utility model "An Environmental Protection Testing Water Sample Storage Box" with patent number ZL202021301429.1 provides an environmental protection testing water sample storage box, including a box body and a constant temperature component. The box body includes a first shell and a second shell, and the constant temperature component includes a compressor, a constant temperature tube, a radiator and a solenoid valve. When in use, first use a reagent bottle to collect the water sample to be tested, and use a thermometer to measure the temperature of the on-site water sample, open the hatch on the second shell, and place the reagent bottles in the first cavity according to the on-site sampling temperature. Turn on the compressor. The compressor, constant temperature tube and radiator are similar to the air-conditioning structure. Control the solenoid valve so that the first cavity maintains different sampling temperatures, reducing the changes in the number of microorganisms and bacteria caused by changes in water temperature.

[0006] Compared with traditional water sample storage boxes, the insulation box used in the above patent adopts an air-conditioning structure to keep water sample reagents warm, which can avoid detection errors caused by temperature changes. However, the insulation box of the above patent is only used for simple storage of water samples and cannot achieve water sample pretreatment. Usually, the colony test of water samples must be completed within the specified 8 hours. Sometimes the distance between the site and the laboratory will exceed 8 hours. In this case, even if the insulation box is good, it will cause the water sample to deteriorate. Utility Model Content

[0007] The technical problem to be solved by the present invention is to provide an on-site detection device for water samples of water purifiers, which can effectively improve the accuracy of the colony detection results of water samples in response to the above-mentioned existing technical status.

[0008] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: an on-site detection device for water samples of a water purifier, characterized in that: the detection device includes a retractable clean room and a test kit for on-site detection of water samples that can be set in the clean room, wherein the clean room includes at least two sets of chambers that shrink from the outside to the inside and can be telescopically connected to each other, and the adjacent sets of chambers are sealed when fully expanded.

[0009] In order to take into account both the convenience of operation and the safety and reliability of use, it is preferred that the clean room includes a first chamber, a second chamber and a third chamber which are successively reduced from the outside to the inside and arranged in layers, wherein the interior of the first chamber and the interior of the second chamber are respectively hollow, the second chamber is nested in the hollow area of the first chamber, and the third chamber is nested in the hollow area of the second chamber, and when the clean room is fully stretched, the connection between the first chamber and the second chamber, and the connection between the second chamber and the third chamber are respectively provided with limit points that can prevent adjacent chambers from stretching and slipping.

[0010] In order to reduce storage volume, improve flexibility of use and facilitate mobile transportation, as a further preference, both sides of the first chamber, the second chamber and the third chamber are respectively provided with hinge components that can facilitate the folding or unfolding of the chamber.

[0011] In order to facilitate positioning and improve the reliability of the clean room, as a further preferred embodiment, the hinge assembly includes a foldable hinge part and a locking device for fixing the sleeve after it is unfolded.

[0012] Simply, as a preference, the locking device may be a hinge spring, a latch, or a snap lock.

[0013] In order to save the operator's effort and facilitate pushing and pulling, as a further preferred embodiment, pulleys are respectively provided at the bottom of the second chamber and the third chamber.

[0014] For the convenience of operation, preferably, the sides of the second and third chambers are also provided with handles for easy pulling out and pushing in.

[0015] In order to ensure the sealing of the clean room, preferably, the front end of the first chamber is sealed and provided with a protective air shower door, the rear end of the first chamber is open, and the bottom of the first chamber is sealed.

[0016] In order to achieve sterilization of the indoor environment, as a further preferred embodiment, an ultraviolet lamp is installed on the top of the first chamber.

[0017] In order to effectively connect the first chamber and the third chamber, preferably, the front end and the rear end of the second chamber are open respectively, the top of the second chamber is sealed, and the bottom of the second chamber is sealed.

[0018] In order to facilitate the transfer of samples, preferably, the front end of the third chamber is open, the rear end of the third chamber is provided with a water sample transfer window, and the bottom of the third chamber is sealed.

[0019] In order to ensure indoor lighting, preferably, a fluorescent lamp is installed on the top of the third room.

[0020] Considering the cleanroom's foldable structure, and to facilitate mobile work, the test kit preferably includes a foldable test bench. This bench comprises a horizontally arranged tabletop and vertically supported brackets on either side of the tabletop. Each bracket is connected to the tabletop with a foldable first hinge. The test bench is also designed to be foldable. After being set up in the cleanroom, the bench can be placed inside and folded up when not in use, facilitating the transport and portable disassembly of the entire equipment.

[0021] In order to improve the placement stability of the test bench, preferably, the height of the bracket is less than or equal to half the length of the table top, and a second hinge is provided in the middle of the table top to facilitate folding of the table top.

[0022] In order to facilitate the cultivation of colony test samples on on-site water samples as soon as possible and prevent the water samples from deteriorating, as a further preferred embodiment, the test kit also includes a reagent cabinet, a universal exhaust hood, a universal rotating bracket, an air conditioner, an insulated box, a laminar flow hood, a laminar flow hood base and a vortex mixer.

[0023] Compared with the existing technology, the advantages of the present invention are: first, it adopts a clean room with a retractable multi-layer suite structure, which can be easily folded for transportation and disassembled and assembled on site, so that the water samples collected from the water purification equipment can be cultured for on-site colony testing as soon as possible, effectively preventing the deterioration of the water samples; secondly, the clean room with an extendable suite structure is different from the insulated box in the existing technology. After unfolding, various water sample testing tools can be placed in the clean room, and the testing equipment can be more complete, which is convenient for the staff to perform standardized operations; in addition, after effective pretreatment of the water samples, the accuracy and reliability of the final colony detection can be improved, thereby reducing the expenditure of the commissioning fee for third-party inspection and saving costs for the company. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a simplified schematic diagram of the internal three-dimensional structure of the clean room according to an embodiment of the present invention (in a fully expanded state).

[0025] Figure 2 This is a schematic diagram of the internal structure of the thermal insulation box according to an embodiment of the present utility model.

[0026] Figure 3 This is a schematic diagram of the external structure of the thermal insulation box according to an embodiment of the present utility model.

[0027] Figure 4 This is a schematic side structural diagram of the clean room in the expanded state according to an embodiment of the present utility model.

[0028] Figure 5 This is a front view of the multi-layer suite structure of the clean room according to an embodiment of the present utility model.

[0029] Figure 6 This is a schematic structural diagram of a test bench according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0030] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0031] like Figures 1 to 6 As shown, this embodiment discloses a water sample on-site detection device, which includes a retractable clean room 1. The clean room 1 includes at least two suites that shrink from the outside to the inside and can be retractably connected to each other. The adjacent suites are sealed when fully expanded.

[0032] Specifically, the clean room 1 of this embodiment includes three, namely, a first chamber 11, a second chamber 21 and a third chamber 31, which are successively smaller from the outside to the inside, wherein the interior of the first chamber 11 and the interior of the second chamber 21 are respectively hollow, the second chamber 21 is nested in the hollow area of the first chamber 11, and the third chamber 31 is nested in the hollow area of the second chamber 21. When the clean room 1 is fully stretched, the connection between the first chamber 11 and the second chamber 21, and the connection between the second chamber 21 and the third chamber 31 are respectively provided with limit points that can prevent adjacent chambers from stretching and slipping. Usually, in order to ensure connection reliability, the limit points can be spaced apart along the circumferential direction of the cross-section of the connection between adjacent chambers, and reference can be made to the limit structure of the multi-section telescopic door or the limit structure of the multi-section telescopic rod in the prior art.

[0033] The clean room 1 of this embodiment adopts a retractable and foldable structure. When the clean room 1 is fully unfolded, it takes on a rectangular box structure. The six sides of the clean room 1 are all made of polyethylene material.

[0034] The three suites of clean room 1 are sealed and connected, such as Figure 4 、 Figure 5 As shown, specifically, the first suite 11 is the largest suite in the three suites. The front end of the first suite 11 is sealed and provided with a protective air shower door 111. The protective air shower door 111 is a purification device for the experimenter to enter the clean room 1. There are rotatable nozzles around the protective air shower door 111, which spray clean air from all directions to the body, thereby quickly removing dust, hair, dandruff and other dirt stuck on clothes, and reducing the environmental pollution caused by the experimenter entering and leaving the clean room 1; the protective air shower door 111 can be opened alone or in pairs, and single opening is preferred; the rear end of the first suite 11 is open, the bottom of the first suite 11 is sealed, and two ultraviolet lamps 112 are installed on the top of the first suite 11. The ultraviolet lamp 112 is used to disinfect the clean room 1, maintain it in a sterile environment, and reduce the interference of the environment on the test. The sterilization function can be turned on by connecting to 220VAC alternating current. The sterilization for 30 minutes can achieve a sterile environment for the clean room 1.

[0035] In order to effectively connect the first chamber 11 and the third chamber 31, the front and rear ends of the second chamber 21 are respectively opened, the top of the second chamber 21 is sealed, and the bottom of the second chamber 21 is sealed;

[0036] The front end of the third chamber 31 is open, and a water sample transfer window 312 is provided at the rear end of the third chamber 31. The water sample transfer window 312 is used to transfer water samples between the non-clean area and the clean area to reduce the number of times the door of the clean room 1 is opened and reduce the pollution in the clean area; the bottom of the third chamber 31 is sealed, and a fluorescent lamp 311 is also installed on the top of the third chamber 31. The fluorescent lamp 311 is used for lighting, and the light intensity is 1000Lux.

[0037] In order to facilitate push-pull operations, pulleys 2 are provided at the bottom of the second and third chambers 21 and 31, respectively. In addition, handles 3 for conveniently pulling out and pushing in the chambers are also provided on the sides of the second and third chambers 21 and 31, respectively.

[0038] In order to reduce storage volume, improve usage flexibility, and facilitate movement and transportation, any side of the clean room 1 may have a folding structure. Preferably, in this embodiment, both sides are foldable.

[0039] Specifically, at least one hinge assembly 4 is provided on both sides of the first, second, and third chambers 11, 21, and 31, respectively, to facilitate folding or unfolding of the chambers. The hinge assembly 4 includes a foldable hinge and a locking device for securing the chambers after unfolding. The hinge assembly 4 can be implemented using various hinge structures known in the art that can achieve folding functions. The locking device ensures that the clean room 1 does not collapse or shrink during use. The locking device can simply be a hinge spring, a latch, or a snap lock.

[0040] In addition, the material of the clean room 1 can be any lightweight material, preferably polyethylene.

[0041] The cross-sectional shape of the clean room 1 can be any shape, and in this embodiment, the cross-sectional shape is preferably square.

[0042] The size of the clean room 1 can be selected as any size according to needs. In this embodiment, it is preferably: 2000 mm in length, 2000 mm in width and 2000 mm in height.

[0043] The clean room 1 may include several suites, and in this embodiment, a three-layer suite structure is preferred.

[0044] After the clean room 1 is unfolded and built, a test kit for on-site water sample testing can be placed in the clean room 1. The test kit mainly includes a test table 5 made of hard polyethylene material, such as Figure 6 As shown, the test bench 5 includes a horizontally arranged tabletop 51 and brackets 52 located on both sides of the tabletop 51 and capable of vertical support. Each bracket 52 is provided with a foldable first hinge spring mechanism 521 at the connection with the tabletop 51. To improve the placement stability of the test bench 5, the height of the bracket 52 is less than or equal to half the length of the tabletop 51. Furthermore, a second hinge spring mechanism 511 is provided in the middle of the tabletop 51 to facilitate the folding of the tabletop 51. Hinge spring mechanisms are conventional technology and can be referenced to the hinge structures of various folding tables and chairs.

[0045] The test bench 5 is also designed to be foldable. After the clean room 1 is built, the test bench 5 is placed inside the room and folded up when not in use, which can facilitate the mobile transportation and portable disassembly and construction of the entire set of equipment.

[0046] In order to facilitate the cultivation of colony test samples of water samples collected on site as soon as possible and prevent the water samples from deteriorating, the test kit also includes a reagent cabinet 61, a universal exhaust hood 62, a universal rotating bracket 63, an air conditioner 64, a laminar flow hood 65, a laminar flow hood base 651, a vortex mixer 66, a chair 67 and an incubator 7.

[0047] The specific operation method of the test device of this embodiment is as follows:

[0048] In the first step, the experimenter goes to the place where water purifier is used to take water samples, puts on lab coat, sterile gloves and mask, and shoe covers, and opens the foldable clean room 1 and the foldable test table 5 in the open space of the sampling place.

[0049] First, manually open the hinge assembly 4 of the first layer, erect the first layer while also erecting the second and third layers, grab the handle 3 of the third layer and push it out of the second layer, and lock the hinge of the third layer, then grab the handle 3 of the second layer and push it out of the first layer, and lock the hinge of the second layer, and finally lock the hinge of the first layer. Thus, the clean room 1 is fully unfolded and installed.

[0050] Next, open the test bench 5 , first open the second hinge spring mechanism 511 in the middle of the table top 51 of the test bench 5 , flatten the table top 51 , and then open the first hinge spring mechanisms 521 of the two side brackets 52 . At this point, the test bench 5 is fully opened and can be placed in the clean room 1 .

[0051] In the second step, the power supply of clean room 1 is connected to 220VAC alternating current, and the ultraviolet germicidal lamp is turned on to disinfect the interior of clean room 1 for 30 minutes; after the disinfection is completed, the power supply is turned off, the protective door of clean room 1 is closed, and clean room 1 is kept in a sterile state; then the fluorescent lamp 311 is turned on to ensure that there is light source lighting inside clean room 1.

[0052] In the third step, the laboratory worker puts on a new lab coat, sterile gloves and a mask, and new shoe covers. He washes his hands with alcohol and sprays his whole body with alcohol to ensure that the laboratory worker himself is disinfected and in a sterile state. Then, he sprays the water purifier and the surrounding environment with alcohol to ensure that the water purifier and the surrounding environment are disinfected and in a sterile environment. Then, he continues to use tweezers to pick up the cotton wool, spray alcohol on the cotton wool, and wipe the water purifier faucet with alcohol. After disinfection, he turns on the water outlet switch to ensure that water continues to flow out of the faucet. He uses a sterile bag to collect 100mL of water sample and seals the sterile bag.

[0053] The fourth step is to open the protective door of the clean room 1, place the sterile water bag with the water sample on the folding test table 5 in the clean room 1, and close the protective door.

[0054] ①. Take out the sterilized pipette, nutrient agar and culture dish from the insulated box 7, take out 1 mL of water sample with a pipette, put it into the culture dish with nutrient agar, and then continue to place it on the test table 5 until the nutrient agar cools to a jelly state.

[0055] ②. After the nutrient agar cools to a jelly-like state, open the upper cover of the insulated box 7, place the culture dish in the culture dish placement area of the insulated box 7, close the upper cover, and seal the insulated box 7. At this time, the insulated box 7 is connected to the municipal electricity of the sampling area, and operate the control panel to set the temperature to 15°C, and the temperature is displayed at 15°C.

[0056] The fifth step is to take out the folding test table 5, remove the locking device of the clean room 1, push the third chamber 31 into the second chamber 21, and then push the second chamber 21 into the first chamber 11, fold the hinges of each chamber, compress the clean room 1 into a smaller component and load it into the transport vehicle, and start the transport vehicle to return; at the same time, cut off the municipal power supply of the insulated box 7, connect it to the vehicle power supply, ensure that the insulated box 7 is always at 15°C, and then transport it insulated until it is delivered to the company's laboratory or designated laboratory; after arriving at the destination, put on sterile gloves again, take out the culture dish, and put it into the incubator of the company or designated laboratory. The incubator temperature is set at 37°C, and the colony culture of the water sample is started. The colony data can be obtained after 48 hours.

[0057] like Figure 1 As shown, in this embodiment, the test kit in the clean room 1 includes a reagent cabinet 61, a universal exhaust hood 62, a universal rotating bracket 63, an air conditioner 64, an insulated box 7, a laminar flow hood 65, a laminar flow hood base 651, a vortex mixer 66, a test table 5, and a chair 67. The specific functions of each component in the above test kit are briefly described as follows:

[0058] Reagent cabinet 61: a cabinet used to store reagents during the test;

[0059] Universal rotating bracket 63: used to fix the exhaust hood, the bracket 52 can rotate 360 degrees;

[0060] Universal exhaust hood 62: used to quickly discharge volatile gases during the test and reduce test interference;

[0061] Air conditioner 64: used for temperature control, maintaining the ambient temperature of clean room 1 at 25°C;

[0062] Insulation box 7: used for constant temperature storage and transportation of culture dishes;

[0063] Laminar flow hood 65: This hood primarily provides a localized, high-purity environment. Its internal HEPA filter and fan system forces air through the filter at a constant pressure, creating a vertical laminar flow that is delivered to the work area, ensuring the required high cleanliness level. This equipment effectively isolates the operator from the product, preventing product contamination, and is particularly suitable for locations requiring a high-purity environment.

[0064] Laminar flow hood base 651: fixed laminar flow hood 65;

[0065] Vortex mixer 66: quickly mixes the water sample by rotating;

[0066] Test bench 5: This is a test bench that can provide a local dust-free, clean, and sterile working environment. It can be used to operate water samples and mix nutrient agar for colony testing.

[0067] Chair 67: It is convenient for the operator to sit and perform the test.

[0068] Among them, the heat preservation box 7 is an existing technology and can be implemented using a conventional structure. Specifically, the structure of the heat preservation box 7 of this embodiment can be seen in Figure 2 、 Figure 3 The insulation box 7 is made of foamed polypropylene and is in the shape of a cuboid, and is divided into an upper cover and an insulation box 7. There is a handle 3 on the top of the upper cover of the insulation box 7, which is convenient for hand-carrying the insulation box 7 and carrying.

[0069] Two small UV germicidal lamps are located inside the upper cover, ensuring sterility within the incubator 7. The UV germicidal lamp duration can be set via the main control panel, ranging from 1 to 60 minutes. A partition panel is located in the middle of the upper cover, matching the panel on the incubator 7. This bayonet-style connection separates the instrument and tool storage area from the culture dish storage area, ensuring both areas remain sterile and independent of each other.

[0070] The insulated box 7 has an outer wall and an inner wall, with a hollow space between the inner and outer walls. Purified water is placed inside this space. Purified water is injected through a small hole in the top of the insulated box 7, with an inner diameter of 10 mm. Once filled with pure water, the hole is sealed with a sealing cap to prevent water from spilling into the insulated box 7. The pure water serves as a circulating fluid, which is supplied by a small pump to the electronic ice chamber. The electronic ice chamber then cools the circulating fluid to 15°C using the Peltier effect. The water then flows through the outlet of the electronic ice chamber into the hollow space between the inner and outer walls of the insulated box 7.

[0071] When the temperature sensor detects that the circulating fluid temperature is above 15°C, a signal is transmitted to the control board via the sensor signal line, starting the small pump. The circulating fluid enters the small pump through the small pump water inlet silicone tube, provided by the small pump. The small pump then provides pressure, and the circulating fluid flows through the small pump water outlet silicone tube through the electronic cooling tank water inlet into the electronic cooling tank. At the same time, the electronic cooling tank fan starts running at a speed of 2700 to 3000 rpm.

[0072] Electronic ice chambers utilize specialized semiconductor materials, such as P-type and N-type semiconductor elements, to form thermocouple pairs. When direct current passes through these thermocouples, heat is absorbed at one end and released at the other, achieving a cooling effect. The cooling chip within the electronic ice chamber, in contact with the interior of the chamber, absorbs heat from the water, lowering its temperature. This maintains the circulating fluid temperature at 15°C, and in turn, the temperature of the insulated chamber 7 at 15°C.

[0073] Incubator 7 has an equipment and tool storage area and a culture dish storage area. The equipment and tool storage area has separate compartments for holding and storing experimental equipment and auxiliary tools, including culture dishes, nutrient agar, pipettes, sterile bags, sterile gloves, cotton wool, alcohol, alcohol spray bottles, tweezers, masks, and foot covers. The culture dish storage area has 10L to 30L of storage space for testing culture dishes. The storage area is temperature-controlled at 15°C to keep the cultured products at a constant temperature.

[0074] The inner wall of the insulated box 7 is equipped with a precision temperature sensor with a range of 1.00°C to 30.00°C and an accuracy of 0.01°C. There are four or more temperature sensors, which are transmitted to the control board through the temperature sensor signal line, and then the current temperature value of the insulated box 7 is displayed digitally on the display board.

[0075] The upper cover of the insulation box 7 and the insulation box 7 are connected by a hinge. There are magnetic strips at the connection between the bottom of the upper cover and the top of the insulation box 7, that is, there is a magnetic strip at the bottom of the upper cover and the top of the insulation box 7. When the upper cover is closed on the top of the insulation box 7, the two magnetic strips attract each other to achieve sealing of the box.

[0076] The insulated box 7 also has a vehicle-mounted connection port for supplying power to the insulated box 7 to enable the various components of the insulated box 7 to operate, and can also be connected to the municipal power supply at the water sampling site.

[0077] The control panel is interconnected with the small pump, electronic ice tank, electronic ice tank fan, temperature sensor, ultraviolet germicidal lamp, display panel, and power connection port. Operations and settings are performed through the control panel, and operation and running results are displayed on the display panel.

[0078] The foldable clean room 1 structure of this embodiment can facilitate on-site pretreatment of water sample colonies after taking out the water sample from the water purifier, ensuring that the water sample will not exceed the test time; the constant temperature of the insulated box 7 can avoid interference from uncertain factors during transportation and avoid repeated testing; at the same time, the ultraviolet lamp 112 is used to disinfect the foldable and movable clean room 1, so that the on-site test environment is sterile, ensuring that the test results are not affected by the environment, and improving the accuracy of the test results; in addition, the foldable structure is convenient for vehicle mounting and mobile use, and has a wider and more flexible scope of application.

[0079] In the specification and claims of the present invention, directional terms such as "front," "back," "up," "down," "left," "right," "side," "top," and "bottom" are used to describe various exemplary structural parts and components of the present invention. However, these terms are used herein for convenience of description only and are based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different orientations, these directional terms are intended for illustrative purposes only and should not be construed as limiting. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. An on-site detection device for water samples from a water purifier, characterized by: The detection device comprises a retractable clean room (1) and a test kit for on-site water sample detection that can be arranged in the clean room (1), wherein the clean room (1) comprises at least two sets of chambers that are successively reduced from the outside to the inside and can be retractably connected to each other, and adjacent sets of chambers are sealed when fully expanded.

2. The on-site detection device for water samples from a water purifier according to claim 1, characterized in that: The clean room (1) comprises a first chamber (11), a second chamber (21) and a third chamber (31) which are successively reduced in size from the outside to the inside and are arranged in layers, wherein the interior of the first chamber (11) and the interior of the second chamber (21) are respectively hollow, the second chamber (21) is nested in the hollow area of the first chamber (11), and the third chamber (31) is nested in the hollow area of the second chamber (21), and when the clean room (1) is fully stretched, the connection between the first chamber (11) and the second chamber (21) and the connection between the second chamber (21) and the third chamber (31) are respectively provided with limit points which can prevent adjacent chambers from stretching and slipping.

3. The on-site detection device for water samples from a water purifier according to claim 2, characterized in that: Both sides of the first chamber (11), the second chamber (21) and the third chamber (31) are respectively provided with hinge components (4) that facilitate the folding or unfolding of the chamber.

4. The on-site detection device for water samples from a water purifier according to claim 3, characterized in that: The hinge assembly (4) comprises a foldable hinge part and a locking device for fixing the sleeve after it is unfolded.

5. The on-site detection device for water samples from a water purifier according to claim 4, characterized in that: The locking device is a hinge spring, a latch, or a snap lock.

6. The on-site detection device for water samples from a water purifier according to claim 2, characterized in that: Pulleys (2) are respectively provided at the bottom of the second chamber (21) and the bottom of the third chamber (31).

7. The on-site detection device for water samples from a water purifier according to claim 2, characterized in that: The sides of the second chamber (21) and the third chamber (31) are respectively provided with handles (3) for easy pulling out and pushing in.

8. The on-site detection device for water samples from a water purifier according to claim 2, characterized in that: The front end of the first chamber (11) is sealed and provided with a protective air shower door (111), the rear end of the first chamber (11) is open, and the bottom of the first chamber (11) is sealed.

9. The on-site detection device for water samples from a water purifier according to claim 8, characterized in that: An ultraviolet lamp (112) is installed on the top of the first chamber (11).

10. The on-site detection device for water samples from a water purifier according to claim 2, characterized in that: The front end and the rear end of the second chamber (21) are respectively open, the top of the second chamber (21) is sealed, and the bottom of the second chamber (21) is sealed.

11. The on-site detection device for water samples from a water purifier according to claim 10, characterized in that: The front end of the third chamber (31) is open, the rear end of the third chamber (31) is provided with a water sample transfer window (312), and the bottom of the third chamber (31) is sealed.

12. The on-site detection device for water samples from a water purifier according to claim 11, characterized in that: A fluorescent lamp (311) is installed on the top of the third chamber (31).

13. The on-site detection device for water samples from a water purifier according to claim 1, characterized in that: The test kit includes a foldable test table (5), which includes a table top (51) that can be horizontally arranged and brackets (52) located on both sides of the table top (51) and capable of vertical support. A foldable first hinge is provided at the connection between each bracket (52) and the table top (51).

14. The on-site detection device for water samples from a water purifier according to claim 13, characterized in that: The height of the bracket (52) is less than or equal to half the length of the desktop (51), and a second hinge is provided in the middle of the desktop (51) to facilitate folding of the desktop (51).

15. The on-site detection device for water samples from a water purifier according to claim 1, characterized in that: The test kit further comprises a reagent cabinet (61), a universal exhaust hood (62), a universal rotating bracket (63), an air conditioner (64), an insulated box (7), a laminar flow hood (65), a laminar flow hood base (651) and a vortex mixer (66).

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