Waterway system and gas water heater
By setting up water quality monitoring devices, including water quality sensors and display screens in the water supply pipeline of the gas water heater, the problem that the gas water heater cannot detect water quality is solved, real-time monitoring and display of water quality is achieved, and the scale of the water system is avoided, and the user experience and equipment stability are improved.
Patent Information
- Application Number
- CN202422026235.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-21
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-08-21
AI Technical Summary
Existing gas water heaters cannot detect the water quality, which may easily lead to scale in the water system pipelines when the water quality deteriorates suddenly, and it is impossible to promptly determine whether the water inlet or the water purification device needs to be shut down.
A water quality monitoring device is installed in the water supply pipeline, including a water quality sensor and a display screen, to detect and display the water quality, and powered by an independent battery to ensure that water quality testing can be carried out at any time.
Through the water quality monitoring device, users can observe the water quality in a timely manner, determine whether it is necessary to shut down the water inlet or add a water purification device to avoid scale in the water system, and improve the accuracy and timeliness of water quality detection.
Smart Images

Figure CN223050199U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of kitchen equipment, and more specifically to a water circuit system and a gas water heater. Background Art
[0002] A gas water heater, also known as a gas water boiler, refers to a gas appliance that uses gas as fuel and transfers heat to cold water flowing through a heat exchanger through combustion heating to achieve the purpose of preparing hot water.
[0003] Existing gas water heaters are merely water heating devices and are unable to detect water quality. Water quality in the same area often varies at different times. Especially during water source treatment or water pipe maintenance in the area, it is easy to cause a sudden deterioration of water quality in the area. When water of poor quality flows into the water circuit system of a gas water heater, it is easy to cause scale formation in the pipeline of the water circuit system. Therefore, there is a need to detect the water quality of the water flowing into the water circuit system to determine whether it is necessary to temporarily shut off the water inlet or add a water purification device. Summary of the Utility Model
[0004] One of the purposes of the present utility model is to provide, in view of the deficiencies of the prior art, a water circuit system that can detect and display the water quality of the water in the water supply pipeline to facilitate users to observe the water quality.
[0005] Another purpose of the present utility model is to provide a gas water heater having the above water circuit system.
[0006] The technical solution measures of the present utility model are as follows:
[0007] A water circuit system for use in a gas water heater, comprising:
[0008] A water supply pipeline for water to flow through, the water supply pipeline being provided with a water quality monitoring device, which includes:
[0009] A water quality sensor for detecting the water quality of the water in the water supply pipeline;
[0010] A display screen electrically connected to the water quality sensor, the display screen being configured to: receive the water quality value detected by the water quality sensor and display the water quality situation.
[0011] Further as a preferred solution, the water quality monitoring device further includes: an independently provided battery;
[0012] Both the water quality sensor and the display screen are electrically connected to the battery and powered by the battery.
[0013] Further as a preferred solution, the water supply pipeline includes: two outlet pipes arranged at intervals, and a water tank body for connecting the two outlet pipes;
[0014] The water tank body has: a water flow cavity for connecting two water outlet pipes, and the diameter of the water flow cavity is larger than the diameter of the water outlet pipes;
[0015] A water quality sensor is placed in the water flow cavity to detect the water quality.
[0016] Further as a preferred solution, the water tank body is detachably fixed between the two water outlet pipes.
[0017] Further as a preferred solution, for each water outlet pipe, an insertion pipe is provided on the water tank body to match the water outlet pipe, and the water outlet pipe is inserted into the insertion pipe and connected to the water flow cavity;
[0018] Moreover, the insertion pipe and the water outlet pipe inserted into the insertion pipe are detachably connected through a buckling structure.
[0019] Further as a preferred solution, the buckling structure includes:
[0020] A first flange provided on the outer periphery of the insertion pipe;
[0021] A second flange provided on the outer periphery of the water outlet pipe, and when the water outlet pipe is inserted into the insertion pipe, the second flange is fitted and attached to the first flange;
[0022] It also includes a detachable clip, which is configured to: limit the first flange and the second flange to fit together, so that the insertion pipe and the water outlet pipe inserted into the insertion pipe are detachably connected.
[0023] Further as a preferred solution, the clip includes:
[0024] Two clamps spaced on both sides of the water outlet pipe, and a connecting arm connecting the two clamps;
[0025] Each clamp is provided with a clamping hole, and the mutually attached first flange and second flange are jointly installed in the clamping hole, so that: the first flange and the second flange are restricted to fit together;
[0026] Moreover, the connecting arm has elasticity, so as to be able to: by driving the connecting arm to undergo an elongation deformation, make the clip in a detachable state.
[0027] Further as a preferred solution, a seal is provided between the water outlet pipe and the inner wall of the water tank body to fill the gap between the water outlet pipe and the inner wall of the water tank body.
[0028] A gas water heater includes the water circuit system in any of the above solutions.
[0029] Further as a preferred solution, the water supply pipeline of the water circuit system is successively connected to: a water inlet pipeline for water supply to flow in, a connecting pipeline wound around the heat exchanger for heat exchange, and an outlet pipeline for the water after heat exchange to flow out;
[0030] The water quality sensor is arranged in the water outlet pipeline to detect the water quality of the water in the water outlet pipeline.
[0031] The main beneficial effects of the above technical solution are as follows:
[0032] By setting up a water quality monitoring device that can detect the water quality of the water in the water supply pipeline, it is convenient for users to observe the water quality of the water in the water circuit system, and it can better judge whether it is necessary to temporarily shut off the water inlet of the water circuit system or whether there is a need to add a water purification device in the water circuit system.
[0033] Further or more detailed beneficial effects will be described in combination with specific embodiments in the specific implementation manners. Brief Description of the Drawings
[0034] The following further describes the present utility model with reference to the drawings:
[0035] Figure 1 It is a schematic diagram of the overall assembly structure of a gas water heater.
[0036] Figure 2 It is a schematic diagram of the water supply pipeline structure.
[0037] Figure 3 It is a schematic diagram of the assembly structure of the water quality monitoring device.
[0038] Figure 4 It is Figure 2 A partial enlarged schematic diagram of part A in
[0039] Figure 5 It is a schematic diagram of the assembly of the water tank body.
[0040] Figure 6 It is a schematic diagram of the internal structure of the water tank body.
[0041] As shown in the figure: housing - 1, bottom shell - 1a, panel - 1b, window - 1.1, protection plate - 1.2, water supply pipeline - 2, water inlet pipeline - 2.1, connecting pipeline - 2.2, water outlet pipeline - 2.3, water outlet pipe - 2.31, second flange - 2.311, water tank body - 2.32, water flow cavity - 2.321, insertion pipe - 2.322, first flange - 2.323, baffle - 2.324, water passing hole - 2.325, clip - 2.33, clamp - 2.331, connecting arm - 2.332, clamping hole - 2.333, seal - 2.34, water quality monitoring device - 4, water quality sensor - 4.1, display screen - 4.2, battery - 4.3, heat exchanger - 6. Specific Implementation Manner
[0042] The following specifically exemplifies the present utility model in combination with embodiments:
[0043] Embodiment 1:
[0044] A waterway system is used in a gas water heater. As shown in the attached Figure 1 to the attached Figure 6 figures, the waterway system is placed inside the housing 1. The waterway system mainly includes a water supply pipeline 2 for water to circulate (i.e., water supply enters from one end and exits from the other end), which is divided into: an inlet pipeline 2.1 with an inlet for water to flow in, an outlet pipeline 2.3 with an outlet for water to flow out, and a connecting pipeline 2.2 that connects the inlet pipeline 2.1 and the outlet pipeline 2.3.
[0045] Among them, the connecting pipeline 2.2 is generally used to coil around the heat exchanger 6 inside the housing 1 of the gas water heater. When the water heater works, gas burns in the heat exchanger 6 to form high temperature. When cold water enters the water supply pipeline 2 from the inlet pipeline 2.1 and flows through the connecting pipeline 2.2, the high temperature formed by the heat exchanger 6 heats the water to form hot water, and the hot water flows from the connecting pipeline 2.2 to the outlet pipeline 2.3 and then is discharged.
[0046] Water quality in the same area often varies at different times. Especially when water source treatment or tap water pipeline maintenance is carried out in this area, it is easy to cause the sudden deterioration of water quality in this area; when water with poor quality flows into the waterway system of the gas water heater, it is easy to cause scaling in the waterway system.
[0047] Based on this, as shown in the attached Figure 2 to the attached Figure 5 figures, in this embodiment, the water supply pipeline 2 of the waterway system is provided with a water quality monitoring device 4 to detect and display the water quality.
[0048] Specifically, as shown in the attached Figure 3 and the attached Figure 6 figures, the water quality monitoring device 4 in this embodiment includes: a water quality sensor 4.1 for detecting the water quality of the water in the water supply pipeline 2, and a display screen 4.2 electrically connected to the water quality sensor 4.1. The display screen 4.2 is configured to: receive the water quality value detected by the water quality sensor 4.1 and display the water quality situation.
[0049] Among them, the water quality sensor 4.1 is preferably a TDS water quality sensor for detecting the TDS value (total dissolved solids) of the influent water. The display screen 4.2 is configured to: receive the TDS value detected by the water quality sensor 4.1 and display the water quality situation based on the TDS value.
[0050] In one case, the display screen 4.2 is configured to directly display the detected TDS value, and the water quality situation can be directly realized by observing the TDS value displayed on the display screen 4.2.
[0051] In another case, the display screen 4.2 is configured to receive the TDS value and set multiple regional values. For example, the first region is set to 0 to 100 ppm, the second region is set to 100 to 300 ppm, and the third region is set to greater than 300 ppm. When the received TDS value is in the first region, the display screen 4.2 displays that the water quality is excellent; when the received TDS value is in the second region, the display screen 4.2 displays that the water quality is good; when the received TDS value is in the third region, the display screen 4.2 displays that the water quality is poor.
[0052] Wherein, when the water circuit system is installed in the gas water heater, both the water quality sensor 4.1 and the display screen 4.2 can be electrically connected to the main board of the gas water heater and powered by the main board.
[0053] However, after the gas water heater is filled with water but before it is powered on, it is impossible to observe the inlet water quality of the water circuit system and confirm the inlet water quality situation.
[0054] Therefore, the water quality monitoring device 4 in this embodiment preferably further includes an independently arranged battery 4.3; the battery 4.3 is preferably arranged independently of the power cord and the main board of the gas water heater. Moreover, both the water quality sensor 4.1 and the display screen 4.2 are electrically connected to the battery 4.3 and powered by the battery 4.3. It is realized that the water quality monitoring device 4 can continuously and stably detect and display the water quality whether the gas water heater is turned on or off.
[0055] Further, as shown in Attached Figure 2 to Attached Figure 6 As shown in the figure, the water supply pipeline 2 includes two outlet pipes 2.31 arranged at intervals and a water tank body 2.32 connecting the two outlet pipes 2.31. The water tank body 2.32 has a water flow cavity 2.321 for connecting the two outlet pipes 2.31.
[0056] The diameter of the water flow cavity 2.321 is preferably larger than the diameter of the outlet pipe 2.31. The water quality sensor 4.1 is preferably placed in the water flow cavity 2.321 to detect the water quality, and the display screen 4.2 is also preferably fixed on the side of the water tank body 2.32 facing the window 1.1 by, for example, screws or glue, and the battery 4.3 is also preferably fixed on the water tank body 2.32 by, for example, screws or glue. In this way, the water quality sensor 4.1 can be placed in the larger-capacity water flow cavity 2.321 to sense the water quality of a larger amount of water and obtain a more accurate detection effect.
[0057] Furthermore, considering the replacement requirement of the water tank body 2.32. In this embodiment, the water tank body 2.32 is preferably detachably fixed between the two outlet pipes 2.31.
[0058] Specifically, in this embodiment, for each water outlet pipe 2.31, an insertion pipe 2.322 is provided on the water tank body 2.32 in a matching manner. The water outlet pipe 2.31 is inserted into the insertion pipe 2.322 and connected to the water flow cavity 2.321.
[0059] That is, as shown in the attached Figure 3 to the attached Figure 6 As shown, at the upper end of the water tank body 2.32, an insertion pipe 2.322 is provided in a matching manner for the upper water outlet pipe 2.31 above. The upper water outlet pipe 2.31 is inserted into the insertion pipe 2.322 at the upper end of the water tank body 2.32 and communicated with the water flow cavity 2.321. At the lower end of the water tank body 2.32, an insertion pipe 2.322 is provided in a matching manner for the lower water outlet pipe 2.31 below. The lower water outlet pipe 2.31 is inserted into the insertion pipe 2.322 at the lower end of the water tank body 2.32 and communicated with the water flow cavity 2.321. Thus, the two water outlet pipes 2.31 are connected through the water flow cavity 2.321.
[0060] Meanwhile, any insertion pipe 2.322 and the water outlet pipe 2.31 inserted into the insertion pipe 2.322 are detachably connected through a buckling structure, realizing that the water tank body 2.32 is detachably fixed between the two water outlet pipes 2.31.
[0061] In this embodiment, as shown in the attached Figure 3 to the attached Figure 6 As shown, the buckling structure includes: a first flange 2.323 provided on the outer periphery of the insertion pipe 2.322, a second flange 2.311 provided on the outer periphery of the water outlet pipe 2.31, and a detachable clip 2.33.
[0062] Among them, the first flange 2.323 and the second flange 2.311 are arranged in a matching manner, so that when the water outlet pipe 2.31 is inserted into the insertion pipe 2.322, the second flange 2.311 fits against the first flange 2.323. The clip 2.33 is configured to: restrict the first flange 2.323 and the second flange 2.311 from fitting together, so that the insertion pipe 2.322 and the water outlet pipe 2.31 inserted into the insertion pipe 2.322 are detachably connected.
[0063] Furthermore, as shown in the attached Figure 5 As shown, the clip 2.33 in this embodiment includes: two spaced clamping rings 2.331, which are respectively arranged on both sides of the water outlet pipe 2.31; and a connecting arm 2.332 connecting the two clamping rings 2.331.
[0064] Among them, each clamping ring 2.331 is provided with a clamping hole 2.333, and the mutually fitting first flange 2.323 and second flange 2.311 are jointly installed in the clamping hole 2.333, so that as shown in the attached Figure 2 and the attachedFigure 3 As shown in the figure: the first flange 2.323 and the second flange 2.311 are fitted together in a restricted manner. Moreover, the connecting arm 2.332 is elastic so that: by driving the connecting arm 2.332 to stretch and deform, the clip 2.33 is in a disassembled state. That is, by bending the two clamps 2.331 outwards, driving the connecting arm 2.332 to stretch, the first flange 2.323 and the second flange 2.311 are separated from the clamping hole 2.333, the clip 2.33 can be disassembled, and the water outlet pipe 2.31 can be pulled out from the plug pipe 2.322, and the water tank body 2.32 can be disassembled.
[0065] A sealing member 2.34 may be provided between the outlet pipe 2.31 and the inner wall of the water tank 2.32 to fill the gap between the outlet pipe 2.31 and the inner wall of the water tank 2.32. The sealing member 2.34 is preferably a sealing ring made of silicone or rubber, etc., which is filled in the gap between the outlet pipe 2.31 and the inner wall of the water tank 2.32 to achieve sealing.
[0066] On the basis of the above, it is further considered that when the gas water heater is working normally, on the one hand, hot water can easily directly impact the water quality sensor 4.1, thereby easily damaging the water quality sensor 4.1; on the other hand, the water flow is discharged quickly, and the water quality sensor 4.1 cannot stably and accurately detect the water quality.
[0067] Therefore, if the attached Figure 6 As shown in , a baffle plate 2.324 may be additionally provided in the water flow chamber 2.321 of the water tank body 2.32. A receiving chamber is formed between the baffle plate 2.324 and the side wall of the water flow chamber 2.321 at intervals, and the water quality sensor 4.1 is placed in the receiving chamber to detect the water quality. Moreover, the upper end of the baffle plate 2.324 is connected to the upper end wall of the water flow chamber 2.321 near the plug-in pipe 2.322 (at this time, the plug-in pipe 2.322 at the upper end of the water tank body 2.32 serves as the water inlet of the water flow chamber 2.321, and the plug-in pipe 2.322 at the lower end serves as the water outlet of the water flow chamber 2.321); the lower end extends downward, and is spaced apart from the side wall of the water flow chamber 2.321 to form an outlet for the water in the receiving chamber to flow out. In order to mitigate the impact and better detect the water quality, it is preferred that the upper end of the baffle plate 2.324 is provided with: a plurality of water holes 2.325 for the water flowing into the water flow cavity 2.321 to flow into the accommodating cavity.
[0068] Furthermore, as attached Figure 6As shown in the figure, in the vertical direction from top to bottom, the baffle 2.324 preferably extends in a curved shape, so that the side of the baffle 2.324 facing away from the accommodating cavity is a curved surface structure, and guides the water to flow smoothly through the drainage surface of the water flow cavity 2.321, ensuring smooth water outlet of the water supply pipeline 2. At the same time, the lower end of the baffle 2.324 is bent and placed below the water quality sensor 4.1, so as to prevent the water entering the accommodating cavity from the water passing hole 2.325 from flowing out quickly, enabling the water quality sensor 4.1 to detect the water quality of the water with reduced flow rate in the accommodating cavity, so as to obtain more stable and accurate detection results.
[0069] Embodiment 2:
[0070] Based on any of the waterway systems in Embodiment 1, a gas water heater with this waterway system is formed. As shown in the attached Figure 1 to the attached Figure 6 figure, it includes a housing 1, and the waterway system is placed inside the housing 1.
[0071] In this embodiment, the housing 1 includes a bottom shell 1a and a panel 1b. The bottom shell 1a has an accommodating cavity with an opening on one side. The waterway system is installed in the accommodating cavity of the bottom shell 1a, and the panel 1b is fixedly connected to the bottom shell 1a, for example, by screws, to cover the opening of the accommodating cavity, forming an outer shell with the waterway system installed inside.
[0072] When the waterway system is installed inside the housing 1, the display screen 4.2 can be placed outside the housing 1. At this time, the display screen 4.2 can be directly installed on the outer surface of the housing 1, or a support frame can be provided outside the housing 1 to fixedly install the display screen 4.2.
[0073] However, considering that if the display screen 4.2 is installed on the surface of the housing 1, not only a relatively long connecting wire is required to electrically connect the display screen 4.2 and the water quality sensor 4.1, forming a complicated wiring structure, but also when the housing 1 is disassembled, it is easy to pull the connecting wire and cause it to break.
[0074] Therefore, in this embodiment, as shown in the attached Figure 1 figure, the display screen 4.2 is arranged inside the housing 1 and preferably close to the water supply pipeline 2 to avoid the above-mentioned wiring situation. At the same time, a window 1.1 is provided on the housing 1, and the window 1.1 is arranged opposite to the display screen 4.2 of the water quality monitoring device 4. For example, as shown in the attached Figure 1 figure, in this embodiment, a window 1.1 opposite to the display screen 4.2 is provided on the panel 1b. Through the window 1.1, the water quality displayed on the display screen 4.2 can be directly observed from outside the housing 1. That is, without disassembling the panel 1b, the water quality situation displayed on the display screen 4.2 can be observed more quickly and directly from outside the housing 1.
[0075] Further considering that after being heated by the heat exchanger 6, some heat-soluble impurities or bacteria in the water are easily eliminated, reducing the impact on the TDS value detection. Therefore, the water quality sensor 4.1 in this embodiment is preferably arranged in the outlet pipeline 2.3 of the water supply pipeline 2 to detect the water quality of the water treated by heating in the outlet pipeline 2.3, so as to obtain a more accurate and required water quality detection result.
[0076] The above are only the preferred embodiments of the present invention, and do not limit the scope of the present invention. In addition, the terms "vertical", "horizontal", "front", "rear", etc. mentioned in the embodiments of the present invention indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. It should be further noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation", etc. in the description should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The present invention will be described in detail below with reference to the drawings and in combination with embodiments.
[0077] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and purpose of the present invention. The scope of the present invention is defined by the claims and their equivalents.
Claims
1. A water system, used in a gas water heater, characterized in that: include: A water supply pipeline (2) for circulating water, wherein the water supply pipeline (2) is provided with a water quality monitoring device (4), which comprises: A water quality sensor (4.1) for detecting the water quality of the water in the water supply pipeline (2); A display screen (4.2) electrically connected to the water quality sensor (4.1), wherein the display screen (4.2) is configured to receive a water quality value detected by the water quality sensor (4.1) and display the water quality condition.
2. The waterway system according to claim 1, characterized in that: The water quality monitoring device (4) further comprises: an independently arranged battery (4.3); The water quality sensor (4.1) and the display screen (4.2) are both electrically connected to the battery (4.3) and are powered by the battery (4.3).
3. The waterway system according to any one of claims 1 to 2, characterized in that: The water supply pipeline (2) comprises: two water outlet pipes (2.31) arranged at intervals, and a water tank (2.32) connecting the two water outlet pipes (2.31); The water box body (2.32) has a water flow cavity (2.321) for connecting the two water outlet pipes (2.31), and the diameter of the water flow cavity (2.321) is larger than the diameter of the water outlet pipes (2.31); The water quality sensor (4.1) is placed in the water flow cavity (2.321) to detect water quality.
4. The waterway system according to claim 3, characterized in that: The water tank body (2.32) is detachably fixed between the two water outlet pipes (2.31).
5. The waterway system according to claim 4, characterized in that: For each of the water outlet pipes (2.31), a plug-in tube (2.322) is provided on the water tank body (2.32) to match the water outlet pipe (2.31), and the water outlet pipe (2.31) is inserted into the plug-in tube (2.322) to communicate with the water flow cavity (2.321); Furthermore, the plug-in tube (2.322) and the water outlet pipe (2.31) inserted into the plug-in tube (2.322) are detachably connected via a buckle structure.
6. The waterway system according to claim 5, characterized in that: The buckle structure comprises: A first flange (2.323) disposed on the outer periphery of the plug-in tube (2.322); a second flange (2.311) disposed on the outer periphery of the water outlet pipe (2.31), wherein when the water outlet pipe (2.31) is inserted into the plug pipe (2.322), the second flange (2.311) fits and abuts on the first flange (2.323); It also includes a detachable clip (2.33) configured to restrict the first flange (2.323) and the second flange (2.311) from fitting together, so that the plug-in tube (2.322) and the water outlet pipe (2.31) inserted into the plug-in tube (2.322) can be detachably connected.
7. The waterway system according to claim 6, characterized in that: The clamp (2.33) comprises: Two clamps (2.331) arranged at intervals on both sides of the water outlet pipe (2.31), and a connecting arm (2.332) connecting the two clamps (2.331); Each of the clamps (2.331) is provided with a clamping hole (2.333), and the first flange (2.323) and the second flange (2.311) that fit together are embedded in the clamping hole (2.333) so that: the first flange (2.323) and the second flange (2.311) are fitted together in a restricted manner; Furthermore, the connecting arm (2.332) is elastic so that the clip (2.33) can be put into a detachable state by driving the connecting arm (2.332) to stretch and deform.
8. The waterway system according to claim 5, characterized in that: A sealing member (2.34) is provided between the water outlet pipe (2.31) and the inner wall of the water tank body (2.32) to fill the gap between the water outlet pipe (2.31) and the inner wall of the water tank body (2.32).
9. Gas water heater, characterized in that: The invention comprises the waterway system as claimed in any one of claims 1 to 8.
10. The gas water heater according to claim 9, characterized in that: The water supply pipeline (2) of the water system is connected in sequence: a water inlet pipeline (2.1) for water to flow in, a connecting pipeline (2.2) coiled around a heat exchanger (6) for heat exchange, and a water outlet pipeline (2.3) for water to flow out after heat exchange; The water quality sensor (4.1) is arranged in the water outlet pipeline (2.3) to detect the water quality of the water in the water outlet pipeline (2.3).