A water quality detection device and method

Abstract

The application discloses a water quality detection device and method, the device comprises: a detection chamber, the detection chamber can accommodate at least one digestion bottle for containing the sample to be detected; a temperature control digestion assembly is arranged at the bottom of the detection chamber and is in contact with the bottom of each digestion bottle to control the temperature of each digestion bottle; a light detection assembly is arranged on the detection chamber to form the same number of detection light paths as the digestion bottles, the light detection assembly comprises at least one light source unit and at least one light detection unit, the light emitted by the light source unit can penetrate the corresponding detection digestion bottle and can be detected by the corresponding light detection unit after penetration, so that the sample to be detected in the digestion bottle can be detected according to the detection result. The application improves the integration of online spectrophotometry and the automation degree of laboratory spectrophotometry, and provides a key core detection unit for realizing multi-parameter automation and portable multi-parameter semi-automatic measurement.

Description

Technical Field

[0001] This invention relates to the field of water quality testing technology, and in particular to a water quality testing device and method. Background Technology

[0002] Spectrophotometry is one of the core methods for water quality testing, widely used to measure the concentration of pollutants in water such as ammonia nitrogen, permanganate index, iron, and manganese. The number of instruments using spectrophotometry for water quality testing is also increasing, currently mainly divided into online instruments and laboratory or portable instruments, which measure the concentration of corresponding pollutants by measuring the absorbance of light at a specific wavelength in the sample.

[0003] Among them, online flow injection spectrophotometers for water quality analysis generally use automatic sampling, reagent injection, and heating digestion before measurement; laboratory spectrophotometers for water quality analysis generally use manual sampling and reagent injection, and the sample to be tested is digested by a heating digestion device before being sent to a spectrophotometer manually or measured visually by manual means.

[0004] These testing methods are complex in structure, costly, and cumbersome to maintain. They require professional personnel to operate, are time-consuming, have low automation, and the measurement results are susceptible to human influence. Furthermore, they are difficult to adapt to the growing demand for water quality testing, especially in technologically backward areas such as rural towns. Summary of the Invention

[0005] This invention provides a water quality testing device and method to solve the problems of low integration and low automation in water quality testing instruments in related technologies, and provides a key core testing unit for realizing multi-parameter automated and portable multi-parameter semi-automated measurement.

[0006] According to one aspect of the present invention, a water quality testing device is provided, comprising:

[0007] The detection chamber is capable of accommodating at least one digestion bottle for holding the sample to be tested.

[0008] The temperature-controlled digestion assembly is located at the bottom of the detection chamber and contacts the bottom of each digestion bottle to control the temperature of each digestion bottle.

[0009] An optical detection assembly is installed on the detection chamber to form a detection optical path with the same number of digestion bottles. The optical detection assembly includes at least one light source unit and at least one optical detection unit. The light emitted by the light source unit can pass through the corresponding digestion bottle and be detected by the corresponding optical detection unit after passing through, so as to detect the sample to be tested in the digestion bottle according to the detection result.

[0010] According to another aspect of the present invention, a water quality testing method is provided, specifically comprising the following steps:

[0011] After the sample to be tested is placed in the digestion bottle and placed in the detection chamber, the temperature-controlled digestion component is controlled to digest the sample under controlled temperature, and the optical detection component is controlled to detect the sample in the digestion bottle, so as to detect different parameters in the sample in batches or in the same batch.

[0012] When there are multiple digestion bottles, each containing the same sample to be tested, different parameters in the sample are detected in batches. This includes controlling the temperature control digestion component to perform temperature control digestion on multiple digestion bottles at the same temperature, and controlling the light detection component to detect multiple digestion bottles at the same wavelength, so as to verify the correctness of the detection results of multiple digestion bottles.

[0013] The detection of different parameters in the same batch of test samples includes: controlling the temperature-controlled digestion component to perform temperature-controlled digestion of two digestion bottles at different temperatures, and controlling the light detection component to detect the two digestion bottles at different wavelengths, in order to detect different parameters in the test samples.

[0014] This invention provides a water quality testing device and method. The device includes a testing chamber capable of accommodating at least one digestion bottle for holding a sample to be tested. A temperature-controlled digestion assembly is located at the bottom of the testing chamber and contacts the bottom of each digestion bottle to control the temperature of each bottle. A light detection assembly is located on the testing chamber and forms a detection light path equal in number to the number of digestion bottles. The light detection assembly includes at least one light source unit and at least one light detection unit. Light emitted from the light source unit can pass through the corresponding digestion bottle and be detected by the corresponding light detection unit, allowing for the detection of the sample in the digestion bottle based on the detection result. By integrating the temperature-controlled digestion assembly and the light detection assembly into the testing chamber, the sample in the digestion bottle can be detected simultaneously or sequentially. This solves the problems of low integration and low automation in related water quality analyzers, providing a key core detection unit for achieving automated and portable semi-automated multi-parameter measurements, thus improving the portability and efficiency of water quality testing.

[0015] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a water quality testing device according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the positional relationship between the detection chamber and the digestion bottle in a water quality testing device according to an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram showing the positional relationship between the detection chamber and the digestion bottle in another water quality testing device provided according to an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the positional relationship between the detection chamber and the digestion bottle in another water quality testing device provided according to an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the positional relationship between the detection chamber and the digestion bottle in another water quality testing device provided according to an embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of the positional relationship between the detection chamber and the digestion bottle in another water quality testing device provided according to an embodiment of the present invention;

[0023] Figure 7 This is a schematic diagram of the positional relationship between the detection chamber and the digestion bottle in another water quality testing device provided according to an embodiment of the present invention;

[0024] Figure 8 This is a schematic diagram of the positional relationship between the detection chamber and the digestion bottle in another water quality testing device provided according to an embodiment of the present invention;

[0025] Figure 9 This is a schematic diagram of the optical path in a water quality testing device according to an embodiment of the present invention;

[0026] Figure 10 This is a first-view structural diagram of a water quality testing device provided according to an embodiment of the present invention;

[0027] Figure 11 This is a second-view structural diagram of a water quality testing device provided according to an embodiment of the present invention;

[0028] Figure 12 This is a flowchart of a water quality testing method provided according to an embodiment of the present invention. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0030] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0031] Figure 1 This is a schematic diagram of a water quality testing device according to an embodiment of the present invention. This embodiment can be widely used to measure the concentration of various pollutants in water, such as ammonia nitrogen, permanganate index, iron, and manganese. It is particularly suitable for water quality testing needs in rural areas with weak infrastructure and underdeveloped technology. The water quality testing device can be implemented in hardware and / or software. It can be configured in portable testing equipment, online monitoring systems, or mobile laboratory platforms to meet water quality testing requirements in different scenarios. This embodiment of the present invention does not impose any limitations on this. Figure 1 As shown, the specific structure of the device is as follows:

[0032] The detection chamber 140 is capable of accommodating at least one digestion bottle 110 for holding the sample to be tested.

[0033] The temperature-controlled digestion assembly 120 is located at the bottom of the detection chamber 140 and is in contact with the bottom of each digestion bottle 110 to control the temperature of each digestion bottle 110.

[0034] The optical detection component 130 is disposed on the detection chamber 140 and is used to form the same number of detection optical paths as the digestion bottles 110. The optical detection component 130 includes at least one light source unit 131 and at least one light detection unit 132. The light emitted by the light source unit 131 can pass through the corresponding digestion bottle 110 and be detected by the corresponding light detection unit 132 after passing through, so as to detect the sample to be tested contained in the digestion bottle 110 according to the detection result.

[0035] In this embodiment, the sample to be tested can specifically be water samples such as laboratory water, surface water, groundwater, and sewage. The digestion bottle 110 is used to hold the sample and for heating. For example, the digestion bottle 110 is made of quartz glass, which has the characteristics of high temperature resistance, low expansion coefficient, and the ability to transmit ultraviolet and infrared rays. The water quality parameters to be detected in the sample include, but are not limited to, the concentrations of various water pollutants such as ammonia nitrogen, permanganate index, iron, and manganese.

[0036] It should be noted that the working principle of this water quality testing device is as follows: Taking one digestion bottle 110 as an example (this can be used as a reference when multiple digestion bottles 110 are used), after the sample to be tested is placed in the digestion bottle 110, the control temperature of the temperature-controlled digestion component 120, the detection wavelength of the optical detection component 130, and the reaction reagent corresponding to the water quality parameter are determined according to the water quality parameters to be detected in the sample. Specifically, after adding the reaction reagent to the sample, the digestion bottle 110 can be placed in the detection chamber 140. Then, the temperature-controlled digestion component 120 digests the digestion bottle 110 (resulting in a certain color). The optical detection component 130 corresponding to the digestion bottle 110 then detects the digestion bottle 110, and the concentration of the water quality parameter in the sample is determined based on the light intensity detected by the optical detection unit 132. This process can be pre-programmed into the controller, which automatically adjusts the temperature, selects the detection wavelength, and calculates the concentration of the water quality parameter under its control; the entire process is almost fully automated.

[0037] It is understandable that the correspondence between water quality parameters and the control temperature (i.e., digestion temperature) of the temperature-controlled digestion component 120, the correspondence between water quality parameters and the detection wavelength of the photodetector component 130, the correspondence between water quality parameters and the reaction reagents, and the correspondence between the concentration of water quality parameters and the light intensity of the photodetector unit can all be calibrated in advance and placed in the corresponding controllers.

[0038] For example, when the water quality parameter in the sample to be tested is ammonia nitrogen, the control temperature of the temperature-controlled digestion component 120 is a first temperature, the detection wavelength of the optical detection component 130 is a first wavelength, and the reaction reagent is a first reagent; when the water quality parameter in the sample to be tested is permanganate index, the control temperature of the temperature-controlled digestion component 120 is a second temperature, the detection wavelength of the optical detection component 130 is a second wavelength, and the reaction reagent is a second reagent, and so on. In this way, in actual use, reverse derivation can be performed to obtain the concentration of the water quality parameter in the sample to be tested. Note that the terms "first" and "second" in this paragraph are for illustrative purposes only and do not represent a completely one-to-one relationship. In some embodiments, one or more of the control temperature, wavelength, and reagent corresponding to different water quality parameters may overlap.

[0039] In this embodiment, the temperature of the temperature-controlled digestion component 120 is adjustable, the detection wavelength in the detection optical path is selectable, and the reaction reagent is selectable, enabling the detection of water quality parameters (same or different) in the test samples (same or different).

[0040] If there is only one digestion bottle 110, to detect the same water quality parameters in the same sample, the same sample can be placed in the digestion bottle 110 each time, the same reagent can be added, the same temperature can be set, and the same detection wavelength can be selected in multiple tests. To detect different water quality parameters in the same sample, the same sample can be placed in the digestion bottle 110 each time, different reagents can be added, different temperatures can be set, and different detection wavelengths can be selected in multiple tests. To detect the same water quality parameters in different samples, different samples can be placed in the digestion bottle 110 each time, the same reagent can be added, the same temperature can be set, and the same detection wavelength can be selected in multiple tests. To detect different water quality parameters in different samples, different samples can be placed in the digestion bottle 110 each time, different reagents can be added, different temperatures can be set, and different detection wavelengths can be selected in multiple tests.

[0041] If there are multiple digestion bottles 110, to detect the same water quality parameters in the same sample, the same sample can be placed in multiple digestion bottles 110 in a single test, and the same reagent can be added. The temperature-controlled digestion assembly 120 can be set to the same temperature simultaneously, and the same detection wavelength can be selected. To detect different water quality parameters in the same sample, the same sample can be placed in multiple digestion bottles 110 in a single test, and different reagents can be added. The temperature-controlled digestion assembly 120 can be set to different temperatures for each sample, and different detection wavelengths can be selected. To detect the same water quality parameters in different samples, different samples can be placed in multiple digestion bottles 110 in a single test, and the same reagent can be added. The temperature-controlled digestion assembly 120 can be set to the same temperature simultaneously, and the same detection wavelength can be selected. When detecting different water quality parameters in different test samples, different test samples can be placed in multiple digestion bottles 110 in one test, and then different reagents can be added. The temperature-controlled digestion component 120 controls the temperature and sets different temperatures, and different detection wavelengths can be selected to achieve the detection.

[0042] In this embodiment, the detection wavelength in the single detection optical path is selectable. The temperature-controlled digestion component 120 can simultaneously or independently control the temperature of each digestion bottle 110, as will be described in detail later. When there are multiple digestion bottles 110, with simultaneous temperature control and a selectable detection wavelength, the water quality detection device can simultaneously detect the same water quality parameters in the samples to be tested in each digestion bottle 110, and can also detect different water quality parameters in the samples to be tested in each digestion bottle 110 in batches. With independent temperature control and a selectable detection wavelength, the water quality detection device can simultaneously detect different water quality parameters in the samples to be tested in each digestion bottle 110.

[0043] Therefore, this device integrates a temperature-controlled digestion component and a photodetector component, allowing temperature-controlled digestion and photodetection to be performed in a single device. Compared to related technologies where temperature-controlled digestion and photodetection are performed separately, this device offers higher integration, higher automation, and portability. Furthermore, the device includes one or more digestion bottles. When multiple digestion bottles are used, water quality parameters (which can be the same or different) in the test samples (which may be in each bottle) can be detected simultaneously. This allows for horizontal or vertical comparison of the detection results, significantly improving both detection efficiency and accuracy.

[0044] The following is a detailed description of the shape of the detection chamber 140 of the water quality testing device, the relative positions of the optical detection component 130 and the detection chamber 140, and the specific positional relationship between the temperature control digestion component 120 and the detection chamber 140.

[0045] Optionally, the shape of the detection chamber 140 is one of a regular polygon, rhombus, circle or rectangle.

[0046] In this embodiment, the shape of the detection chamber 140 can be various, including but not limited to regular polygons, rhombuses, circles, or rectangles. The shape of the detection chamber 140 can be determined by the shape and number of digestion bottles 110, the shape and size of the temperature-controlled digestion assembly 120, and the shape, size, and arrangement of the optical detection assembly 130. By setting the detection chamber 140 to the above shape, it is advantageous to arrange the optical detection assembly 130 around the periphery of the detection chamber 140 to form a detection light path that passes through the corresponding digestion bottle 110, and the arrangement position is easy to determine. It also facilitates the adaptation of the shape and size of the temperature-controlled digestion assembly 120 and its accommodation at the bottom of the detection chamber 140. Furthermore, it makes the overall water quality testing device more aesthetically pleasing and neat, and the manufacturing process is easier to implement. The shape of the detection chamber 140 described in this embodiment refers to the shape of the bottom of the detection chamber 140; the overall shape of the detection chamber 140 can be a columnar structure formed based on these shapes.

[0047] Optionally, the first distance between the light source unit 131 and the corresponding digestion bottle 110 in different detection optical paths is the same, and the second distance between the light detection unit 132 and the corresponding digestion bottle 110 is the same.

[0048] To ensure that the detection light intensity in different detection optical paths is not affected by other factors and to improve detection accuracy, the distances between the light source unit 131 and the digestion bottle 110, and between the digestion bottle 110 and the light detection unit 132, are all set to be the same in each detection optical path. For example, if there are two digestion bottles 110, a first digestion bottle and a second digestion bottle, the first detection optical path corresponding to the first digestion bottle has a first light source unit and a first light detection unit, and the second detection optical path corresponding to the second digestion bottle has a second light source unit and a second light detection unit. The distance between the first light source unit and the first digestion bottle is the same as the distance between the second light source unit and the second digestion bottle. The distance between the first light detection unit and the first digestion bottle is the same as the distance between the second light detection unit and the second digestion bottle. In this way, the distance between the light source unit 131 and the digestion bottle 110 is the same in each detection optical path, and the distance between the digestion bottle 110 and the light detection unit 132 is the same. This avoids the problem of inaccurate or inconsistent detection caused by different optical paths when detecting the same or different water quality parameters in different digestion bottles 110.

[0049] Optionally, when the detection chamber is a regular polygon and the number of digestion bottles is three or more, the number of sides of the regular polygon is the same as the number of digestion bottles;

[0050] When the number of sides of the regular polygon is even or odd, each digestion bottle is attached to the corner of the regular polygon, and the light source unit and the corresponding light detection unit are distributed on both sides of the corner of the digestion bottle attached to the regular polygon; or, each digestion bottle is attached to the middle of the side of the regular polygon, and the optical axis of the detection optical path is parallel to the side of the regular polygon attached to the digestion bottle.

[0051] When the number of sides of a regular polygon is even, the digestion bottles set on opposite sides are staggered, and the optical axis of the probe optical path is perpendicular to the opposite side.

[0052] When the number of sides of the regular polygon is odd, each digestion bottle is placed at the middle of the side of the regular polygon, and the optical axis of the probe optical path is perpendicular to the side of the regular polygon to which the digestion bottle is attached.

[0053] Understandably, when there is one or two digestion bottles 110, the shape of the detection chamber 140 can be rhomboid, circular, rectangular, or square. These shapes are all axially symmetric, facilitating the placement of the digestion bottles 110 and the photodetector assembly 130. A single digestion bottle 110 can be placed at the center of these shapes; two digestion bottles 110 can be placed along the axis of symmetry. For example, when the detection chamber 140 is rhomboid, two digestion bottles 110 can be arranged along one diagonal of the rhombus, with the light source unit 131 and the light detection unit 132 in the photodetector assembly 130 positioned on either side of this diagonal. When the detection chamber 140 is circular, two digestion bottles 110 can be arranged along the diameter of the circle, with the light source unit 131 and the light detection unit 132 in the photodetector assembly 130 positioned on either side of the diameter. When the detection chamber 140 is rectangular or square, there are two digestion bottles 110, which can be arranged on the axis of symmetry of the rectangle. Then, the light source unit 131 and the light detection unit 132 in the light detection assembly 130 are arranged on both sides of the axis of symmetry.

[0054] When there are three or more digestion bottles 110, a regular polygonal detection chamber 140 is better suited for arranging the digestion bottles 110 and the optical detection component 130, which saves space and ensures that different detection optical paths have the same illumination and detection distances. When there are three or more digestion bottles 110, the number of sides of the regular polygon (e.g., odd-numbered sides can be equilateral triangles, regular pentagons, etc., and even-numbered sides can be squares, regular hexagons, etc.) is the same as the number of digestion bottles 110. Therefore, the following uses a detection chamber 140 as a regular polygon (even-numbered sides are exemplified by a square, and odd-numbered sides by a regular pentagon) as an example to illustrate the arrangement of the digestion bottles 110 and the optical detection component 130.

[0055] Figure 2 This is a schematic diagram illustrating the positional relationship between the detection chamber and the digestion bottle in a water quality testing device according to an embodiment of the present invention. For example,... Figure 2As shown, the detection chamber 140 contains four digestion bottles 110. Each digestion bottle 110 can be positioned to fit against a corner of the square detection chamber 140. A light source unit 131 and a corresponding light detection unit 132 are distributed on both sides of the corner of the digestion bottle 110 that fits against the square. That is, the light source unit 131 and the light detection unit 132 are both positioned around the periphery of the detection chamber 140 to detect water quality parameters. The dashed line in the figure represents the detection optical path. In this embodiment, the specific position of the digestion bottle 110 against the corner of the detection chamber 140 can be determined in advance based on the size ratio between the detection chamber 140 and the digestion bottle 110, and the distance between the light source unit 131 and the light detection unit 132 and the digestion bottle 110. Furthermore, during the arrangement, the overlapping positions of the light source unit 131 and the light detection unit 132 in different detection optical paths can be avoided, ensuring that each detection optical path has a corresponding light source unit 131 and light detection unit 132. In other embodiments, the two detection optical paths may share a single light source unit 131 and light detection unit 132 to save costs. In the figure, the triangle represents the light source unit 131, and the small rectangle represents the light detection unit 132, and so on.

[0056] Figure 3 This is a schematic diagram illustrating the positional relationship between the detection chamber and the digestion bottle in another water quality testing device according to an embodiment of the present invention. For example,... Figure 3 As shown, the detection chamber 140 contains four digestion bottles 110. Each digestion bottle 110 is positioned at the center of a side of the square chamber. The optical axis of the detection light path is parallel to the side of the digestion bottle 110. The light source unit 131 and the corresponding light detection unit 132 are both located around the periphery of the detection chamber 140, specifically distributed on two adjacent sides of the regular polygon where the digestion bottles 110 are attached, to detect water quality parameters. In this embodiment, the specific position of the center of the side of the square detection chamber 140 where the digestion bottles 110 are attached can be determined in advance based on the size ratio between the detection chamber 140 and the digestion bottles 110, as well as the distance between the detection optical paths of the light source unit 131 and the light detection unit 132 and the digestion bottles 110. Specifically, each digestion bottle 110 is evenly arranged at the center of each side of the detection chamber 140, and the four digestion bottles 110 maintain a symmetrical relationship.

[0057] Figure 4 This is a schematic diagram illustrating the positional relationship between the detection chamber and the digestion bottle in another water quality testing device according to an embodiment of the present invention. For example, ... Figure 4As shown, the detection chamber 140 contains four digestion bottles 110. The digestion bottles 110 arranged on opposite sides are staggered. The light source unit 131 and the corresponding light detection unit 132 are both arranged on the periphery of the detection chamber 140. At this time, the optical axis of the detection optical path is perpendicular to the opposite side of the digestion bottle 110. In this embodiment, the digestion bottles 110 are placed against the sides of the square detection chamber 140. However, each digestion bottle 110 is not located in the middle of the side. Instead, it is placed in the middle of the side. The digestion bottles 110 on the left side of the square detection chamber 140 are offset downwards along the length of the side. The digestion bottles 110 on the bottom side of the square detection chamber 140 are offset to the right along the length of the side. The digestion bottles 110 on the right side of the square detection chamber 140 are offset upwards along the length of the side. The digestion bottles 110 on the top side of the square detection chamber 140 are offset to the left along the length of the side. This offset makes the centers of each digestion bottle 110 no longer symmetrical, and they are arranged in an interlaced manner, but they still uniformly cover the area of ​​the square detection chamber 140. At the same time, when the bottles are arranged in an alternating manner, any two digestion bottles 110 should not be on the same horizontal or vertical line to avoid the detection optical path passing through two digestion bottles 110 at the same time for detection.

[0058] Figure 5 This is a schematic diagram illustrating the positional relationship between the detection chamber and the digestion bottle in another water quality testing device according to an embodiment of the present invention. For example, as shown... Figure 5 As shown, the detection chamber 140 contains five digestion bottles 110. Each digestion bottle 110 can be positioned to fit against a corner of the regular pentagonal detection chamber 140. A light source unit 131 and a corresponding light detection unit 132 are distributed on both sides of the corner of the regular pentagon where the digestion bottle 110 fits. That is, both the light source unit 131 and the light detection unit 132 are positioned around the periphery of the detection chamber 140 to detect water quality parameters. In this embodiment, the specific position of the digestion bottle 110 against the corner of the regular pentagonal detection chamber 140 can be determined in advance based on the size ratio between the regular pentagonal detection chamber 140 and the digestion bottle 110, as well as the distance between the light source unit 131 and the light detection unit 132 and the digestion bottle 110, calculated beforehand. Furthermore, during arrangement, it is necessary to avoid overlapping positions of the light source unit 131 and the light detection unit 132 in different detection optical paths.

[0059] Figure 6This is a schematic diagram illustrating the positional relationship between the detection chamber and the digestion bottles in another water quality testing device according to an embodiment of the present invention. For example, the detection chamber 140 contains five digestion bottles 110. Each digestion bottle 110 is positioned to fit against the middle of a side of the regular pentagonal detection chamber 140. The optical axis of the detection optical path is parallel to the side of the digestion bottle 110 that is fitted with it. A light source unit 131 and a corresponding light detection unit 132 are distributed around the periphery of two adjacent sides of the regular pentagon to detect water quality parameters. In this embodiment, the specific position of the digestion bottle 110 is determined based on the size ratio between the regular pentagonal detection chamber 140 and the digestion bottle 110.

[0060] Figure 7 This is a schematic diagram illustrating the positional relationship between the detection chamber and the digestion bottles in another water quality testing device according to an embodiment of the present invention. For example, the detection chamber 140 contains five digestion bottles 110. Each digestion bottle 110 is positioned to fit against the middle of a side of the regular pentagonal detection chamber 140. The optical axis of the detection optical path is perpendicular to the side where the digestion bottle 110 is fitted. The light source unit 131 and the light detection unit 132 are distributed on one side of the side where the digestion bottle 110 is fitted and on one side of the vertex of the regular pentagonal detection chamber 140 corresponding to that side. In this embodiment, the specific position of the digestion bottle 110 is determined based on the size ratio between the regular pentagonal detection chamber 140 and the digestion bottle 110. The light source unit 131 and the light detection unit 132 are distributed on the connecting line between the middle of the edge of the digestion bottle 110 and its corresponding vertex, and are also distributed on the periphery of the edge and the periphery of the vertex of the detection chamber 140. The detection chamber 140 and the digestion bottle 110 are in a uniform distribution state.

[0061] Based on the above description of the shape of the detection chamber 140 of the water quality testing device, the relative positions of the optical detection component 130 and the detection chamber 140, and the relative positions of the digestion bottle 110 and the detection chamber 140, some details are also involved, which will be explained in detail below.

[0062] Optionally, both the light source unit 131 and the light detection unit 132 are located on the periphery of the detection chamber 140;

[0063] When the first spacing and the second spacing are the same, and different detection optical paths do not intersect on the edge of the regular polygon, the number of light source units 131 is the same as the number of light detection units 132, and the units in the light detection component 130 set on the same edge of the polygon are different.

[0064] When the first spacing is the same as the second spacing, and different detection optical paths intersect on the edge of the regular polygon, the light source unit 131 or light detection unit 132 corresponding to different detection optical paths can be shared.

[0065] In the water quality testing using the above-described embodiments, both the light source unit 131 and the light detection unit 132 in the water quality testing device are located around the periphery of the testing chamber 140. When the first distance between the light source unit 131 and the corresponding digestion bottle 110 in the detection optical path and the second distance between the light detection unit 132 and the corresponding digestion bottle 110 in the detection optical path are the same, and different detection optical paths do not intersect on the sides of the regular polygonal testing chamber 140, then the number of light source units 131 and light detection units 132 required for water quality testing is the same. Each light source unit 131 and light detection unit 132 corresponds one-to-one and cannot be shared. Furthermore, the units in the light detection components 130 corresponding to each side of the regular polygonal testing chamber 140 are different. For example, as described above... Figure 3 As shown, the light source unit 131 and the light detection unit 132 are both distributed around the periphery of the detection chamber 140, and the digestion bottle 110 is distributed in the middle of the side of the detection chamber 140. The first and second spacings of the two detection optical paths corresponding to each side are the same. The two detection optical paths corresponding to any side of the detection chamber 140 do not intersect and do not form an intersection point on the same side. At this time, each detection optical path needs to have a corresponding light detection component 130, and the number of light source units 131 and light detection units 132 is the same. Each side of the detection chamber 140 corresponds to one light source unit 131 and one light detection unit 132. The light detection component 130 of each detection optical path performs water quality detection. This arrangement of light source units 131 and light detection units 132 around the periphery of the detection chamber 140 avoids crosstalk between detection optical paths caused by having light source units 131 on one side and light detection units 132 on the other side during detection.

[0066] In the water quality testing using the above-described embodiments, both the light source unit 131 and the light detection unit 132 in the water quality testing device are located around the periphery of the testing chamber 140. When the first distance between the light source unit 131 and the corresponding digestion bottle 110 in the detection optical path and the second distance between the light detection unit 132 and the corresponding digestion bottle 110 in the detection optical path are the same, and different detection optical paths intersect at the edges of the regular polygonal testing chamber 140, then the required light source unit 131 and light detection unit 132 can be shared during water quality testing. This reduces the number of light source units 131 and light detection units 132, thus saving resource costs during water quality testing. For example, as described above... Figure 2As shown, the light source unit 131 and the light detection unit 132 are both distributed around the periphery of the square detection chamber 140, and the digestion bottle 110 is distributed at the corner of the detection chamber 140. The two detection light paths corresponding to each side of the detection chamber 140 intersect at a point on the side of the detection chamber 140. At this time, the light source unit 131 and the light detection unit 132 in the light detection assembly 130 can be shared. Specifically, at the intersection point where the two detection light paths intersect at one of the sides of the detection chamber 140, a light source unit 131 or a light detection unit 132 is set, and a corresponding light detection unit 132 or a light source unit 131 is set at the other end of the two detection light paths corresponding to the light source unit 131 or the light detection unit 132 to detect water quality parameters. This arrangement can reduce the number of light detection assemblies 130, and can achieve efficient detection of water quality parameters while saving resource costs.

[0067] Based on the two placement positions and quantities of the light source unit 131 and the light detection unit 132 provided in the above embodiments, it is possible to ensure that the various detection optical paths do not interfere with each other when performing water quality testing. At the same time, by sharing the light source unit 131 or the light detection unit 132, the resource cost of water quality testing can be saved and the testing efficiency can be improved.

[0068] In addition to the above, the placement of the detection chamber 140 and the optical detection component 130 can also be varied to make the water quality testing process more flexible. The specific structure will be described below using the pentagonal detection chamber 140 as an example.

[0069] Optionally, the water quality testing device also includes a central rotating unit 150, located on the central axis of the testing chamber 140;

[0070] Each optical detection unit 132 is disposed around the periphery of the detection chamber 140, and the light source unit 131 is disposed on the central axis of the detection chamber 140; the central rotation unit 150 is used to drive the light source unit 131 to rotate.

[0071] Alternatively, each photodetector unit 132 is positioned on the central axis of the detection chamber 140, and the light source unit 131 is positioned on the periphery of the detection chamber 140; the central rotation unit 150 is used to drive the photodetector unit 132 to rotate.

[0072] It is understandable that when the first distance between the light source unit 131 and the digestion bottle 110 corresponding to different detection optical paths and the second distance between the light detection unit 132 and the digestion bottle 110 are the same, the detection chamber 140 in the water quality detection device can also be provided with a central rotation unit 150 at its center position to drive the light source unit 131 or the light detection unit 132 to rotate.

[0073] Figure 8This is a schematic diagram illustrating the positional relationship between the detection chamber and the optical detection component in another water quality testing device according to an embodiment of the present invention. For example, ... Figure 8 As shown, taking a regular pentagonal detection chamber 140 as an example, the digestion bottle 110 is located at the middle of the side of the regular pentagonal detection chamber 140, and the central rotation unit 150 is located at the center of the regular pentagonal detection chamber 140, used to drive the light source unit 131 in the light detection assembly 130 to rotate. The light detection unit 132 in the light detection assembly 130 is located at the periphery of the detection chamber 140. In this embodiment, when the light source unit 131 is located on the central rotation unit 150, the other light detection units 132 are located at the periphery of the detection chamber 140. When it is necessary to detect the water quality parameters of the samples to be tested in different digestion bottles 110, the light source unit 131 on the central rotation unit 150 is rotated to penetrate different digestion bottles 110 and illuminate the corresponding light detection unit 132 to detect the water quality parameters. In other embodiments, the light detection unit 132 can be located in the central rotating unit 150, and other light source units 131 can be located at the periphery of the detection chamber 140. When it is necessary to detect the water quality parameters of the samples to be tested in different digestion bottles 110, the light detection unit 132 on the central rotating unit 150 is rotated to receive the light beam after the light source unit 131 illuminates the digestion bottle 110, so as to detect the water quality parameters.

[0074] The various water quality testing methods provided in the above embodiments solve the problems of traditional testing devices having a single structure, cumbersome testing procedures, and poor adaptability. They can meet the needs of various testing scenarios such as laboratories and on-site testing, simplify the operation process, realize the intelligence and flexibility of water quality testing, and at the same time improve testing efficiency and reduce testing resource costs.

[0075] Based on the positional relationship between the detection chamber 140 and the digestion bottle 110, and the positional relationship between the detection chamber 140 and the optical detection component 130 in the water quality detection device provided in any of the above embodiments, the detection optical path when the water quality detection device is used for detection will be described in detail below.

[0076] Optionally, each light source unit 131 includes multiple light-emitting elements 210 for detecting wavelengths, a light-diffusing plate 211, a collimating lens 212 and a first aperture 213, and each light detection unit 132 includes a second aperture 215, a converging lens 216 and a photodetector 217.

[0077] Among them, the light-emitting element 210, the light-diffusing plate 211, the collimating lens 212, the first aperture 213, the second aperture 215, the converging lens 216 and the photodetector 217 are arranged sequentially along the path of the detection light path, and the light-emitting elements 210 in the same light source unit 131 are arranged in a ring.

[0078] It is important to understand that during water quality testing, when the water is placed in different ways as described above, the light source unit 131 illuminates the digestion bottle 110, allowing the light beam to enter the light detection unit 132. Based on the light intensity detection result of the photodetector 217 in the light detection unit 132, the concentration of the water quality parameters is determined. In this process, different light sources are used to illuminate the digestion bottle 110 according to different water quality parameters. This process will be explained in detail below.

[0079] Figure 9 This is a schematic diagram of the optical path in a water quality testing device according to an embodiment of the present invention. For example, ... Figure 9 As shown, four digestion bottles 110 are distributed inside the square detection chamber 140. Each digestion bottle 110 is located at a corner of the detection chamber 140. A light source unit 131 and a light detection unit 132 are distributed on each side of the detection chamber 140. The light source unit 131 and the light detection unit 132 are on a straight line and form a detection light path between them. Each device unit in the light source unit 131 is encapsulated in the first housing 214, and each device unit in the light detection unit 132 is encapsulated in the second housing 218.

[0080] In this embodiment, each light-emitting element 210 in the light source unit 131 is a plurality of LEDs capable of emitting different wavelengths. For example, the center wavelengths of each light-emitting element 210 are 365nm, 440nm, 470nm, 550nm, 610nm, and 700nm, respectively. The light-emitting elements 210 with different wavelengths correspond to different parameter indicators in water quality detection. Each light-emitting element 210 is controlled to emit light individually by a constant current modulation light source driving circuit to achieve the function of light splitting. At the same time, the light-emitting elements 210 can be controlled to emit light in a time-division manner. Furthermore, the light-emitting elements 210 in each light source unit 131 are arranged in a ring, which can improve the uniformity and stability of the light source. When water quality parameters are detected, the light-emitting element 210 in the light source unit 131 emits light of a corresponding wavelength. After different wavelengths of light are emitted, they pass through the light-diffusing plate 211 with a certain transmittance for light mixing. The emission surface of the light-diffusing plate 211 can be regarded as a uniform surface. Through light mixing technology, the light after mixing in the light-diffusing plate 211 can be made more uniform and more stable. The light emitted from the emission surface of the light-diffusing plate 211 is collimated into a beam of light with more stable measurement by the collimating lens 212. After passing through the first aperture 213, it is directed into the optical channel corresponding to the temperature-controlled digestion component 120. After passing through the digestion bottle 110, the beam enters the light detection unit 132, specifically through the second aperture 215, and reaches the converging lens 216. The converging lens 216 converges and integrates the beam, and finally reaches the photodetector 217 in the light detection unit 132 for light intensity detection. The water quality parameters are detected based on the magnitude of the light intensity. Among them, the photodetector 217 adopts a high-sensitivity silicon photodiode detector, which can improve the detection accuracy and realize reliable measurement of parameters.

[0081] In this embodiment, the emitted light is uniformly mixed by the light homogenizer 211 before subsequent detection, which can improve the reliability and stability of the detection.

[0082] When testing water quality, in addition to considering the required distribution structure of the testing device and the detection optical path, it is also necessary to consider the specific process of heating the digestion bottle 110 using the device, which will be described in detail below.

[0083] Optionally, the temperature-controlled digestion assembly 120 includes: a heating unit and a temperature detection unit, as well as heat-conducting cavity grooves 160 for accommodating digestion bottles 110 and having the same number as the digestion bottles 110;

[0084] The heating unit is one or more of the same number as the digestion bottle 110. One heating unit can heat each digestion bottle 110 simultaneously through the bottom of each heat conduction cavity 160, and multiple heating units can heat the corresponding digestion bottle 110 simultaneously or at different times through the corresponding heat conduction cavity 160.

[0085] The temperature detection unit is one or more, the same number as the digestion bottles 110. One temperature detection unit is used to detect the temperature of the detection chamber 140 when each digestion bottle 110 is heated at the same time. Multiple temperature detection units can detect the temperature of each heat-conducting cavity 160 at the same time or at different times.

[0086] Understandably, in this water quality testing device, when the temperature-controlled digestion assembly 120 heats the digestion bottle 110, it involves a heating unit, a temperature detection unit, and a heat-conducting cavity 160. The temperature-controlled digestion assembly 120 includes a heating unit and a temperature detection unit. On one hand, the heating unit heats the digestion bottle 110 in the heat-conducting cavity 160; on the other hand, the temperature detection unit monitors the temperature of the digestion bottle 110 in the heat-conducting cavity 160 in real time. The heat-conducting cavity 160 is used to hold the digestion bottle 110. When there is one heating unit, heating can be completed simultaneously by sharing one heating unit when heating the digestion bottles 110 in each heat-conducting cavity 160. When the number of heating units is the same as the number of digestion bottles 110, each heating unit can be controlled to heat the digestion bottles 110 in each heat-conducting cavity 160 simultaneously, or to heat the digestion bottles 110 in each heat-conducting cavity 160 at different times. Meanwhile, during heating, a temperature detection unit is required to monitor the heating temperature in real time. When there is only one temperature detection unit, when the digestion bottles 110 in each heat-conducting cavity 160 are heated simultaneously, the temperature detection unit can directly detect the heating temperature of each heat-conducting cavity 160 and the digestion bottles 110. When the number of temperature detection units is the same as the number of digestion bottles 110, then during the process of multiple digestion bottles 110 being heated simultaneously or at different times, different temperature detection units can also detect the temperature of the heat-conducting cavity 160 simultaneously or at different times.

[0087] Figure 10 This is a first-view structural diagram of a water quality testing device according to an embodiment of the present invention. Figure 11 This is a second-view structural diagram of a water quality testing device according to an embodiment of the present invention. Examples include... Figure 10 and 11As shown, this water quality testing device is a four-chamber device. In this device, the light source unit 131 is mechanically fixed to the optical base 182 and is fixedly connected to the temperature-controlled digestion assembly 120 via heat insulation material 170. The light detection unit 132 is also mechanically fixed to the optical base 182 and fixedly connected to the temperature-controlled digestion assembly 120 via heat insulation material 170. When detecting different water quality parameters, the light source unit 131 emits light of the corresponding wavelength. The light beam penetrates the heat-conducting cavity 160, which is heated at the corresponding temperature, and then enters the light detection unit 132 to detect the light intensity, thereby detecting the water quality parameters in the sample to be tested in the digestion bottle 110. Specifically, during the heating process, the temperature-controlled digestion assembly 120 heats the heat-conducting cavity 160. The temperature-controlled digestion assembly 120 includes a heating unit and a temperature detection unit. The heating unit includes a heating element 180, a heat-insulating plate 181, and a high-temperature resistant gasket 184. The temperature detection unit includes a temperature control component 185. The heat-conducting cavity 160 is formed from two, four, or more independent cavities using a high thermal conductivity metal. Each cavity holds a digestion bottle 110 and corresponds to an independent optical channel. For example, the high thermal conductivity metal can be gold, silver, or copper. During the heating process, the heating element 180, placed at the bottom of the heat-conducting cavity 160, heats the cavity. The heat is evenly conducted to all heat-conducting cavity 160 through the metal cavity. The heating element 180 is made of ceramic material, which has the characteristics of high temperature resistance and fast heat transfer. A high-temperature resistant gasket 184 is placed above the heat-conducting cavity 160. Meanwhile, the heat insulation plate 181 fixes the heating element 180 to the bottom of the heat-conducting cavity groove 160 by screws, which is used to insulate and cover the heating area, reduce heat loss and prevent accidental external contact. For example, the heat insulation plate is made of mica.

[0088] During heating, the temperature of the heat-conducting cavity 160 is monitored in real time by a temperature detection unit and detected using a temperature control component 185. Specifically, the temperature control component 185 is screwed into the threaded cavity at the bottom of the heat-conducting cavity 160 to detect its temperature in real time, and dynamically adjusts the heating temperature in conjunction with a PID algorithm on the circuit, making the detection process more intelligent and automated. For example, the temperature control component 185 is a threaded PT100 temperature sensor.

[0089] For example, when there is one heating unit, one heating unit can simultaneously heat each digestion bottle 110 to the same temperature through the bottom of each heat-conducting cavity, which can improve the efficiency of detection and save costs; when there are multiple heating units and the number is the same as the number of digestion bottles 110, multiple heating units can simultaneously or at different times heat the corresponding digestion bottles 110 to different temperatures through the corresponding heat-conducting cavity 160, which can improve the flexibility and adaptability of detection.

[0090] For example, when there is only one temperature detection unit, it can detect the temperature when each digestion bottle 110 is heated simultaneously, which can save resource costs; when there are multiple temperature detection units, the same number as the number of digestion bottles 110, the temperature of each heat-conducting cavity 160 can be detected simultaneously or at different times, which reflects the flexibility of detection.

[0091] Optionally, the temperature control digestion assembly 120 also includes a temperature control switch 183, which is located on the detection chamber 140 and connected to each heating unit. The temperature control switch 183 is used to control all heating units to stop heating when the temperature detected by the temperature detection unit exceeds the preset temperature.

[0092] Understandably, during the heating and temperature detection process of the water quality testing device, a temperature control switch 183 is also included. This temperature control switch 183 is located on the detection chamber 140 and connected to each heating unit. It is used to control all heating units to stop heating when the temperature detected by the temperature detection unit exceeds a preset temperature. The preset temperature is a corresponding detection temperature set in advance for different samples to be tested. For example, the temperature control switch 183 is a flange-type temperature switch, a protective switch, fixed to the side wall of the heat-conducting cavity 160 by screws as an independent hardware protection unit. When the detected temperature exceeds a certain preset temperature (°C), it automatically cuts off the power to the heating element to prevent the system from overheating and protect the safety of the device. Simultaneously, after temperature reduction is completed, i.e., after heating is finished, if it is necessary to lower the temperature, a DC fan will force-cool the entire heat-conducting cavity 160, allowing the sample to quickly drop to a certain measurement temperature or room temperature.

[0093] In this embodiment, through the collaborative cooperation of each unit in the temperature-controlled digestion component 120, and the mutual cooperation of the light detection unit 132 and the light source unit 131, the intelligent and efficient water quality detection is achieved, thereby improving the automation level and overall efficiency of water quality detection.

[0094] The following section will provide a detailed explanation of the water quality testing methods using the aforementioned water quality testing device.

[0095] Optional, such as Figure 12 As shown, the detection method includes the following steps:

[0096] S110. After the sample to be tested is placed in the digestion bottle and placed in the detection chamber, the temperature-controlled digestion component is controlled to perform temperature-controlled digestion of the sample to be tested, and the optical detection component is controlled to detect the sample to be tested in the digestion bottle, so as to detect different parameters in the sample to be tested in batches or in the same batch.

[0097] S120. When there are multiple digestion bottles, the multiple digestion bottles contain the same sample to be tested, and different parameters in the sample to be tested are detected in batches, including: controlling the temperature control digestion component to perform temperature control digestion of multiple digestion bottles at the same temperature, and controlling the light detection component to detect multiple digestion bottles at the same wavelength, so as to verify the correctness of the detection results of multiple digestion bottles.

[0098] S130. Detecting different parameters in the same batch of samples to be tested includes: controlling the temperature-controlled digestion component to perform temperature-controlled digestion of two digestion bottles at different temperatures, and controlling the light detection component to detect the two digestion bottles at different wavelengths, so as to detect different parameters in the samples to be tested.

[0099] Understandably, when using water quality testing devices to test samples, the parameters to be tested can be measured in batches or in the same batch. Batch testing means dividing a group of water samples into multiple batches for different parameters to be tested. The parameters to be tested are the same in each batch, but the parameters to be tested are different between different batches. Each parameter of the water sample is measured in batches. In the same batch test, water samples that need to be measured for different water quality parameters are grouped together. The parameters measured in this group are different, thus achieving the simultaneous measurement of multiple water quality parameters.

[0100] Figure 12 This is a flowchart of a water quality testing method provided according to an embodiment of the present invention. Figure 12 As shown, after the sample to be tested is placed in the digestion bottle 110 and placed in the detection chamber 140, the temperature-controlled digestion assembly 120 is controlled to perform temperature-controlled digestion of the sample to be tested. In this process, temperature-controlled digestion can be performed in batches or in the same batch.

[0101] For example, when measuring different parameters in the same sample in batches, in the first batch, to test a specific parameter in the sample, a digestion bottle 110 containing the same sample is placed in the detection chamber 140. The temperature-controlled digestion assembly 120 is activated to heat the sample in the digestion bottle 110, and each digestion bottle 110 reaches the same final heating temperature. After heating is complete, a light source of the same wavelength is used to irradiate the sample in the digestion bottle 110, and the photodetector 130 receives the light beam to measure the parameter. After the first batch is completed, the same steps are followed to measure another parameter in the second batch, and so on, until all parameters are measured. For example, iron is measured in the first batch, and ammonia nitrogen is measured in the second batch.

[0102] For example, when measuring different analytes in the same batch of test samples, test samples with different reaction reagents are placed in the detection chamber 140. The temperature-controlled digestion assembly 120 is controlled to heat the digestion bottles at different temperatures, allowing different digestion bottles 110 to undergo different temperature-controlled digestions. That is, the analytes in each digestion bottle 110 within the same batch are different. For example, the first digestion bottle 110 is used to detect the analyte ammonia nitrogen, and the second digestion bottle 110 is used to detect the analyte iron. After the heating reaction is complete, the digestion bottles 110 are irradiated with light sources of different wavelengths. Each analyte corresponds to a light source of a specific wavelength. After irradiation, the photodetector assembly 130 is activated to receive and respond to the light beam. Based on the light intensity, the analyte in the test sample is detected.

[0103] The technical solution of this embodiment, by placing the digestion bottle 110 containing the sample to be tested into the detection chamber 140, adopts a batch or same batch detection mode, combined with the temperature-controlled digestion component 120 and the optical detection component 130, realizes efficient semi-automatic measurement of multiple water quality parameters, avoids the problem of cumbersome operation steps in the traditional detection process, and improves the work efficiency and data reliability of water quality detection.

[0104] It should be understood that the steps described in this embodiment can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of the present invention can be achieved, and no limitation is imposed herein.

[0105] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A water quality testing device, characterized in that, include: A detection chamber, wherein the detection chamber is capable of accommodating at least one digestion bottle for holding the sample to be tested; A temperature-controlled digestion assembly is disposed at the bottom of the detection chamber and in contact with the bottom of each digestion bottle to control the temperature of each digestion bottle; An optical detection component is disposed on the detection chamber to form a detection optical path with the same number of digestion bottles. The optical detection component includes at least one light source unit and at least one optical detection unit. The light emitted by the light source unit can pass through the digestion bottle to be detected and can be detected by the corresponding optical detection unit after passing through, so as to detect the sample to be tested in the digestion bottle according to the detection result. The first distance between the light source unit and the corresponding digestion bottle in different detection optical paths is the same, and the second distance between the light detection unit and the corresponding digestion bottle is the same. When the detection chamber is a regular polygon and the number of digestion bottles is three or more, the number of sides of the regular polygon is the same as the number of digestion bottles; When the number of sides of the regular polygon is even or odd, each digestion bottle is attached to the corner of the regular polygon, and the light source unit and the corresponding light detection unit are distributed on both sides of the corner of the digestion bottle attached to the regular polygon; or, each digestion bottle is attached to the middle of the side of the regular polygon, and the optical axis of the detection optical path is parallel to the side of the regular polygon to which the digestion bottle is attached. When the number of sides of the regular polygon is even, the digestion bottles arranged on opposite sides are staggered, and the optical axis of the detection optical path is perpendicular to the opposite side; When the number of sides of the regular polygon is odd, each digestion bottle is disposed in the middle of the side of the regular polygon, and the optical axis of the detection optical path is perpendicular to the side of the regular polygon in which the digestion bottle is attached. The temperature-controlled digestion assembly includes: a heating unit and a temperature detection unit, as well as a heat-conducting cavity for accommodating the digestion bottles and having the same number of digestion bottles; The heating unit may be one or more, the same number as the digestion bottles. One heating unit can heat each digestion bottle simultaneously through the bottom of each heat-conducting cavity, and multiple heating units can heat the corresponding digestion bottles simultaneously or at different times through the corresponding heat-conducting cavity. The temperature detection unit may be one or more units equal to the number of digestion bottles. One temperature detection unit is used to detect the temperature of the detection chamber when each of the digestion bottles is heated simultaneously. Multiple temperature detection units can detect the temperature of each of the heat-conducting chambers simultaneously or at different times.

2. The water quality testing device according to claim 1, characterized in that, The detection chamber is either a regular polygon or a circle.

3. The water quality testing device according to claim 1, characterized in that, Both the light source unit and the light detection unit are located on the periphery of the detection chamber; When the first spacing is the same as the second spacing, and different detection optical paths do not intersect on the edge of the regular polygon, the number of light source units is the same as the number of light detection units, and the units in the light detection component corresponding to the same edge of the polygon are different; When the first spacing is the same as the second spacing, and different detection optical paths intersect on the sides of the regular polygon, the light source unit or the light detection unit corresponding to different detection optical paths can be shared.

4. The water quality testing device according to claim 1, characterized in that, It also includes a central rotating unit located on the central axis of the detection chamber; Each of the optical detection units is disposed around the periphery of the detection chamber, and the light source unit is disposed on the central axis of the detection chamber; the central rotation unit is used to drive the light source unit to rotate. Alternatively, each of the optical detection units is disposed on the central axis of the detection chamber, and the light source unit is disposed on the periphery of the detection chamber; the central rotation unit is used to drive the optical detection units to rotate.

5. The water quality testing device according to claim 1, characterized in that, Each of the light source units includes multiple light-emitting elements for detecting wavelengths, a light-diffusing plate, a collimating lens, and a first aperture; each of the light detection units includes a second aperture, a converging lens, and a photodetector. The light-emitting element, the light-diffusing plate, the collimating lens, the first aperture, the second aperture, the converging lens, and the photodetector are arranged sequentially along the path of the detection optical path, and the light-emitting elements in the same light source unit are arranged in a ring.

6. The water quality testing device according to claim 1, characterized in that, The temperature-controlled digestion assembly also includes a temperature control switch located on the detection chamber and connected to each of the heating units. The temperature control switch is used to control all the heating units to stop heating when the temperature detected by the temperature detection unit exceeds a preset temperature.

7. A water quality testing method, characterized in that, Based on the water quality testing device as described in any one of claims 1-6, the testing method includes the following steps: After the sample to be tested is placed in the digestion bottle and placed in the detection chamber, the temperature-controlled digestion component is controlled to perform temperature-controlled digestion of the sample to be tested, and the optical detection component is controlled to detect the sample to be tested in the digestion bottle, so as to detect different parameters in the sample to be tested in batches or in the same batch. When there are multiple digestion bottles, each digestion bottle contains the same sample to be tested. The detection of different parameters in the sample to be tested in batches includes: controlling the temperature control digestion component to perform temperature control digestion on multiple digestion bottles at the same temperature, and controlling the optical detection component to detect multiple digestion bottles at the same wavelength, so as to verify the correctness of the detection results of multiple digestion bottles. The detection of different parameters in the same batch of the sample to be tested includes: controlling the temperature-controlled digestion component to perform temperature-controlled digestion of the two digestion bottles at different temperatures, and controlling the optical detection component to detect the two digestion bottles at different wavelengths, so as to detect different parameters in the sample to be tested.

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