WO2020211345A1 - Water quality measurement device, refrigerator water supply system and refrigerator - Google Patents

Abstract

The present invention relates to the technical field of water quality measurement, and provides a water quality measurement device, a refrigerator water supply system and a refrigerator. The water quality measurement device comprises a mounting pipeline (9) and a water quality measurement probe, wherein the mounting pipeline (9) comprises a water inlet pipe section (901), a water outlet pipe section (903), and a connecting pipe section (902) communicating the water inlet pipe section (901) and the water outlet pipe section (903), and under the conditions where water flow is introduced into the mounting pipeline (9), a flow speed in the connecting pipe section (902) is greater than a flow speed in the water inlet pipe section (901); and the water quality measurement probe is mounted on the connecting pipe section (902) and extends into the connecting pipe section (902). The water quality measurement device avoids the combination of same with a water tank, and is thereby able to prevent leakage at a junction. In addition, since the flow speed in the connecting pipe section (902) is greater than the flow speed in the water inlet pipe section (901), local acceleration of the water flow in the connecting pipe section (902) is achieved, such that the water quality measurement probe extending into the connecting pipe section (902) is scoured by the water flow, and impurities are prevented from being deposited on the surface of the water quality measurement probe, thereby improving the measurement precision of same. Since the water quality measurement probe is not influenced by the accumulation of impurities, the service life of the water quality measurement device can be prolonged.

Description

Water quality detection device, refrigerator water supply system and refrigerator

cross reference

This application refers to the Chinese patent application No. 201910307545X filed on April 17, 2019 with the patent title "Water quality detection device, refrigerator water supply system and refrigerator", which is fully incorporated into this application by reference.

Technical field

This application relates to the technical field of water quality detection, and in particular to a water quality detection device, a refrigerator water supply system and a refrigerator.

Background technique

Refer to Figure 1 for the structure of the existing water quality detection device, which includes a lead 1, a housing 2 and an electrode pair 3. Among them, the basic use method of the existing water quality detection device is to directly insert the water quality detection device into the water tank 4, please refer to FIG. 2. Therefore, this kind of water quality detection device has the following shortcomings: firstly, there is sediment between the electrodes, which affects the detection accuracy; secondly, there is a risk of leakage at the direct junction of the detection device and the water tank; finally, due to the generation of sediment between the electrodes, As a result, the service life of the water quality detection device is relatively short.

Summary of the invention

This application aims to solve at least one of the technical problems existing in the prior art or related technologies.

One of the objectives of the present application is to provide a water quality detection device to solve the technical problems of poor detection accuracy, leakage risk, and relatively short life span of the water quality detection device in the prior art.

In order to achieve this objective, the present application provides a water quality detection device, including an installation pipeline and a water quality detection probe. The installation pipeline includes a water inlet pipe section, a water outlet pipe section, and a connecting pipe section connecting the water inlet pipe section and the water outlet pipe section, The water inlet pipe section and the connecting pipe section are configured such that when water flows through the installation pipe, the flow velocity in the connecting pipe section is greater than the flow velocity of the water inlet pipe section; the water quality detection probe is installed in the connection On the pipe section and extend into the connecting pipe section.

In one embodiment, the cross-sectional area of the water inlet pipe section is larger than the cross-sectional area of the connecting pipe section.

In one embodiment, the water inlet pipe section and the connecting pipe section extend along different axes, and the water inlet pipe section and the connecting pipe section are configured such that when water flows through the installation pipe, the The gravitational potential energy of the water in the water inlet pipe section is higher than that of the water in the connecting pipe section.

In one embodiment, the water inlet pipe section is a curved pipe section, and the connecting pipe section is a straight pipe section.

In an embodiment, the water quality detection probe is an electrode pair.

In an embodiment, the connecting pipe section partially bulges outward to form a mounting recess of the electrode pair.

In an embodiment, the electrode pair includes a positive electrode and a negative electrode, and the end of the positive electrode and the end of the negative electrode are both flush with the inner wall of the connecting pipe section.

In an embodiment, the electrode pair includes a positive electrode and a negative electrode, and the end of the positive electrode and the end of the negative electrode both protrude relative to the inner wall of the connecting pipe section.

In an embodiment, the electrode pair includes a positive electrode and a negative electrode, and the positive electrode and the negative electrode are coaxially arranged.

In an embodiment, the electrode pair includes a positive electrode and a negative electrode, and the positive electrode and the negative electrode are arranged on the same side of the connecting pipe section.

In an embodiment, the water quality detection probe is a laser light source and a receiving screen.

In one embodiment, both the inner wall of the water inlet pipe section and the inner wall of the water outlet pipe section are provided with a first groove and a second groove, and the first groove is located in the second groove away from the connection. On one side of the pipe section, a clamp ring is fixed in the first groove, and a sealing ring is fixed in the second groove.

The technical solution of the present application has the following advantages: the water quality detection device of the present application is connected to the pipeline through an installation pipeline, instead of being combined with a water tank. Since the traditional water quality detection device and the water tank are prone to leakage, this type of water quality detection device avoids the combination with the water tank, thereby avoiding leakage at the joint. In addition, this kind of water quality detection device, because the flow velocity in the connecting pipe section is greater than the flow velocity of the inlet pipe section, the water flow in the connecting pipe section is locally accelerated, so that the water quality detection probe extending into the connecting pipe section is washed by the water flow, avoiding the surface of the water quality detection probe Produce impurity deposits to improve the detection accuracy of the water quality detection device. Moreover, since the water quality detection probe is not affected by the accumulation of impurities, the service life of the water quality detection device can be extended.

Another object of the present application is to provide a refrigerator water supply system, including a water container and a water outlet pipe connected to the water container, and the water quality detection device is provided on the water outlet pipe.

In the refrigerator water supply system, a water quality detection device is arranged on the water outlet pipe of the water container, so that the water quality of the refrigerator water supply system can be detected. Further, the refrigerator water supply system also includes a drain valve. Once the water quality is detected as unqualified, the refrigerator water supply system will control the drain valve to drain water based on the detection result to avoid the growth and deposition of organic matter in the refrigerator water supply system, and fundamentally prevent The occurrence of water quality problems can improve the safety and sanitation of the refrigerator water supply system and ensure the health of users. Moreover, even if the refrigerator water supply system is not used for a long time, it does not require the user to drain and flush the refrigerator water supply system when it is restarted, which reduces the difficulty of operation and improves the convenience of the user.

Another object of the present application is to provide a refrigerator including the above-mentioned refrigerator water supply system.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

Figure 1 is a schematic diagram of the structure of a water quality detection device in the prior art;

Figure 2 is a schematic diagram of the installation of a water quality detection device in the prior art;

3 is a schematic diagram of the structure of the water quality detection device in the first embodiment of the present application;

4 is a schematic diagram of the structure of the water quality detection device of the second embodiment of the present application;

FIG. 5 is a schematic structural diagram of a water quality detection device of Embodiment 3 of the present application;

FIG. 6 is a schematic structural diagram of a water quality detection device according to Embodiment 4 of the present application;

FIG. 7 is a schematic structural diagram of a water quality detection device according to Embodiment 5 of the present application;

FIG. 8 is a schematic structural diagram of a water quality detection device of Embodiment 6 of the present application;

9 is a schematic diagram of the installation of the water quality detection device in the refrigerator water supply system according to an embodiment of the present application;

10 is a schematic diagram of the installation structure of the water quality detector and the controller in the refrigerator water supply system according to an embodiment of the present application;

In the picture: 1. Wire; 2. Shell; 3. Electrode pair; 4. Water tank; 5. Clamp ring; 8. Seal ring; 9. Pipe installation; 901. Water inlet pipe section; 902. Connecting pipe section; 903. Outlet Water pipe section; 10, water inlet valve; 11, filter; 12, water container; 13, water quality inspection device; 14, drain valve; 15, water diversion valve; 16, controller; 17, water pump; 18, first outlet Water pipe; 19. The second outlet pipe; 20. User interface.

detailed description

In order to be able to understand the above objectives, features and advantages of the application more clearly, the application will be further described in detail below in conjunction with the accompanying drawings and specific implementations. It should be noted that the embodiments of the application and the features in the embodiments can be combined with each other if there is no conflict.

In the description of this application, it should be noted that the terms "center", "vertical", "horizontal", "upper", "lower", "front", "rear", "left", "right", " Unless otherwise specified, the orientation or positional relationship indicated by "vertical", "horizontal", "top", "bottom", "inner", and "outer" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the application 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 application. In addition, the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.

In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral Ground connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in this application can be understood under specific circumstances.

Example one

Please refer to Fig. 3, the water quality detection device of the first embodiment includes an installation pipe 9 and a water quality detection probe. The installation pipeline 9 includes a water inlet pipe section 901, a water outlet pipe section 903, and a connecting pipe section 902 connecting the water inlet pipe section and the water outlet pipe section. The cross-sectional area of the water inlet pipe section 901 is larger than the cross-sectional area of the connecting pipe section 902. The water quality detection probe is installed on the connecting pipe section and extends into the connecting pipe section.

This kind of water quality detection device is connected to the pipeline by installing the pipeline 9 instead of being combined with the water tank. Since the traditional water quality detection device and the water tank are prone to leakage, this type of water quality detection device avoids the combination with the water tank, thereby avoiding leakage at the joint. In addition, since the cross-sectional area of the water inlet pipe section is larger than that of the connecting pipe section, the flow velocity in the connecting pipe section is greater than that of the water inlet pipe section. Therefore, the water flow in the connecting pipe section is accelerated locally, so that the The water quality detection probe in the connecting pipe section is scoured by the water flow to avoid impurity deposits on the surface of the water quality detection probe, so as to improve the detection accuracy of the water quality detection device. Among them, the main purpose of accelerating the water flow at the connecting pipe section is to ensure that the water flow at the water quality detection probe has a large flow velocity. Moreover, since the water quality detection probe is not affected by the accumulation of impurities, the service life of the water quality detection device can be extended.

Among them, "the water quality detection probe is installed on the connecting pipe section and extends into the connecting pipe section" refers to all situations in which the water quality detection probe can contact the liquid inside the connecting pipe section. Including the case where the end of the water quality detection probe is flush with the inner wall of the connecting pipe section, and the case where the end of the water quality detecting probe protrudes relative to the inner wall of the connecting pipe section.

Refer to Figure 3, the water quality detection probe is electrode pair 3, and the electrode pair 3 is coaxially arranged. In this case, the erosion of the two electrodes is the same, thereby preventing the upstream electrode from being more easily damaged.

In Fig. 3, the electrode pair 3 is connected to the circuit through the wire 1.

It is also found from FIG. 3 that the connecting pipe section partially bulges outward to form a mounting recess for the electrode pair 3. The electrode pair 3 is installed in the mounting recess, wherein the electrode pair 3 includes a positive electrode and a negative electrode, and the number of the mounting recesses is two, which are respectively used for mounting the positive electrode and the negative electrode. In this case, the electrode pair 3 is installed reliably, and is hardly affected by water flow, which can extend the life of the water quality detection device.

In addition, in FIG. 3, the end of the positive electrode and the end of the negative electrode of the electrode pair 3 protrude relative to the inner wall of the connecting pipe section. This situation can ensure that the electrode pair 3 is in full contact with the water flow to accurately detect the water quality. Of course, the end of the positive electrode and the end of the negative electrode of the electrode pair 3 can also be flush with the inner wall of the connecting pipe section, so as to prevent the water flow from washing the electrode pair 3 and ensure the service life of the water quality detection device.

In Figure 3, both the inner wall of the water inlet pipe section and the inner wall of the water outlet pipe section are provided with a first groove and a second groove. Wherein, the clamp ring 5 is fixed in the first groove, and the sealing ring 8 is fixed in the second groove. Furthermore, through the arrangement of the clamp ring 5 and the sealing ring 8, a sealed connection between the installation pipe 9 and the pipeline is realized. Among them, the function of the clamp ring 5 is mainly to lock the installation pipeline 9 and the pipeline, and the function of the sealing ring 8 is mainly to realize the seal between the installation pipeline 9 and the pipeline and prevent water leakage.

According to the first embodiment of the present application, the first groove is located on the side of the second groove away from the connecting pipe section. In this case, relative to the installation pipe 9, the first groove is located outside the second groove, that is, the collar 5 is located outside the sealing ring 8, and the sealing effect of the sealing ring 8 can be better ensured. Wherein, when the cross sections of the water inlet pipe section and the water outlet pipe section are round (ignoring the wall thickness of the water inlet pipe section and the water outlet pipe section), the O-shaped seal ring 8 can be used as the sealing ring 8 at this time.

Of course, in addition to the above-mentioned clamp ring 5 and sealing ring 8 for sealing connection between the installation pipe 9 and the pipeline, other clamping methods, threaded connection methods, welding methods or bonding methods can also be used for connection. For example, when other clamping methods are used, the installation pipe 9 and the pipe section that matches the installation pipe 9 can be clamped by clamps. For another example, when the threaded connection method is adopted, the ends of the water inlet pipe section and the water outlet pipe section are provided with internal threads/external threads, and the pipes are provided with external threads/internal threads that cooperate with them.

Example two

Please refer to FIG. 4. The difference from the first embodiment is that in the second embodiment, the electrode pair 3 is arranged on the same side of the connecting pipe section. In this case, the positive electrode and the negative electrode are connected to the external circuit from the same side, thereby facilitating the setting of the external circuit.

In one case, the positive electrode and the negative electrode of the electrode pair 3 are arranged in parallel, and the wire 1 is connected from the same side of the connecting pipe section. In this case, the structure of the connecting pipe section is more regular, thereby facilitating preparation.

Example three

Similar to the first embodiment, the details in the third embodiment will not be repeated. The difference from the first embodiment is that in the third embodiment, please refer to FIG. 5, in order to make the flow velocity in the connecting pipe section 902 greater than the flow velocity of the water inlet pipe section 901 when the water flow is introduced into the installation pipe 9, the water inlet pipe section 901 The connecting pipe section 902 and the connecting pipe section 902 extend along different axes, and the water inlet pipe section 901 and the connecting pipe section 902 meet the following requirements: when water flows into the installation pipe 9, the gravitational potential energy of the water in the water inlet pipe section is higher than that of the water in the connecting pipe section. Here, "the gravitational potential energy of the water in the inlet pipe section is higher than the gravitational potential energy of the water in the connecting pipe section" is for the same amount of water.

Therefore, in Figure 5, when the water flows from the inlet pipe section to the connecting pipe section, part of the gravitational potential energy of the water is converted into the kinetic energy of the water, which in turn increases the speed of the water flow in the connecting pipe section, and makes the water quality detection probe protruding into the connecting pipe section suffer The flow of water avoids impurity deposits on the surface of the water quality detection probe, so as to improve the detection accuracy of the water quality detection device.

Example four

Similar to the third embodiment, the details in the fourth embodiment are omitted. The difference from the third embodiment is that in the fourth embodiment, referring to FIG. 6, the electrode pair 3 is arranged on the same side of the connecting pipe section. In this case, the positive electrode and the negative electrode are connected to the external circuit from the same side, thereby facilitating the setting of the external circuit. In one case, the positive electrode and the negative electrode of the electrode pair 3 are arranged in parallel. In this case, the structure of the connecting pipe section is more regular, thereby facilitating preparation.

Example five

Similar to the first embodiment, the fifth embodiment will not be repeated. The difference from the first embodiment is that in the fifth embodiment, in order to make the flow velocity in the connecting pipe section 902 greater than the flow velocity of the water inlet pipe section 901 when water flows into the installation pipe 9, the water inlet pipe section 901 is set as a curved pipe section , See Figure 7. Furthermore, even if the water flow carries a small amount of impurities or breeds a small amount of organic matter, the impurities or opportunities will only be cut off in the inlet pipe section, thereby avoiding the deposition of organic matter at the water quality detection probe when the water flows through the connecting pipe section. Moreover, because the water inlet pipe section is designed as a curved pipe section, the flow velocity in the connecting pipe section will be greater than that in the water inlet pipe section, causing the water flow to scour the water quality detection probe and further avoid the deposition of organic matter on the water quality detection probe.

Example Six

The same as the fifth embodiment, the sixth embodiment will not be repeated. The difference from the fifth embodiment is that in the sixth embodiment, referring to FIG. 8, the electrode pair 3 is arranged on the same side of the connecting pipe section. In this case, the positive electrode and the negative electrode are connected to the external circuit from the same side, thereby facilitating the setting of the external circuit. In one case, the positive electrode and the negative electrode of the electrode pair 3 are arranged in parallel. In this case, the structure of the connecting pipe section is more regular, thereby facilitating preparation.

Of course, when the water quality detection probe is the electrode pair 3, the specific arrangement of the electrode pair 3 is not limited by Embodiment 1 to Embodiment 6, as long as the arrangement of the electrode pair 3 can meet the requirements for water quality detection.

In addition, in addition to adopting the form of the electrode pair 3, the water quality detection probe can also adopt any form disclosed in the prior art. For example, the water quality detection probe can also take the form of a laser light source and a receiving screen. Among them, the content of suspended solids in water can be detected through the laser light source and the receiving screen. Alternatively, the water quality detection probe may also adopt a magnetic probe, a thermal probe or any probe form that has been disclosed in the prior art.

In addition, the structure of the installation pipe 9 of the present application is not limited by the examples in the above embodiments, as long as the water inlet pipe section and the connecting pipe section meet the requirement that "when water flows into the installation pipe 9, the flow velocity in the connecting pipe section is greater than the water inlet pipe section. The flow rate" is sufficient, and the specific structure is not limited by the above examples.

Example Seven

Referring to Fig. 9, the seventh embodiment provides a refrigerator water supply system, including a water container 12 and a water outlet pipe connected to the water container 12, and the water quality detection device 13 mentioned in the above embodiment is provided on the water outlet pipe.

Further, a drain valve 14 is provided on the water outlet pipeline. In addition, the refrigerator water supply system also includes a controller 16, see Fig. 10. The water quality detection device 13 is used to obtain the water quality parameters of the water in the water outlet pipe and send it to the controller 16, and the controller 16 controls the drain valve 14 according to the water quality parameters. And when the water quality parameter exceeds the standard, the drain valve 14 is controlled to open.

In this kind of refrigerator water supply system, a water quality detection device 13 is provided on the water outlet pipe of the water container 12, so as to detect the internal water quality of the refrigerator water supply system. Further, the refrigerator water supply system also includes a drain valve 14. Once the water quality is detected as unqualified, the refrigerator water supply system will control the drain valve 14 to drain water based on the detection result to avoid the growth and deposition of organic matter in the water container 12, and then fundamentally To prevent the occurrence of water quality problems, to improve the safety and sanitation of the refrigerator water supply system, and to ensure the health of users. Moreover, even if the refrigerator water supply system is not used for a long time, it does not require the user to drain and flush the refrigerator water supply system when it is restarted, which reduces the difficulty of operation and improves the convenience of the user.

It is found from FIGS. 9 and 10 that the refrigerator water supply system also includes a water inlet pipe of the water container 12. Wherein, a water inlet valve 10 is provided in the water inlet pipe. The water inlet valve 10 can control the on-off between the entire refrigerator water supply system and the water source. The type of the water inlet valve 10 is not limited, for example, it may be an electric control valve, a magnetic control valve, a mechanical valve, etc.

In addition, a filter 11 can also be provided in the refrigerator water supply system for filtering water in the refrigerator water supply system, so as to obtain water quality that meets the needs of users. The filter 11 should be installed in any position of the water supply system of the refrigerator, but in order to avoid impurities and deposits in the water container 12, the filter 11 is preferably installed on the water inlet pipe, and the water entering the water container 12 is to meet user needs It can also avoid the accumulation and precipitation of organic matter in the water container 12.

In addition, it is found from Figures 9 and 10 that a water diversion valve 15 is also provided on the water outlet pipe. The first outlet of the water diversion valve 15 is connected to the ice maker, and the second outlet is connected to the distributor on the door of the refrigerator water supply system. Wherein, the water diversion valve 15 is provided so that the user can use the water provided by the refrigerator water supply system to make ice, or can directly obtain drinking water through the dispenser. Of course, the application of water supply to the water container 12 of the refrigerator water supply system is not limited by the examples here, and can also be used for any other purposes.

Wherein, when a water diversion valve 15 is provided on the water outlet pipeline, the water diversion valve 15 and the drain valve 14 can be arranged in parallel. 9 and 10, the water outlet pipeline includes a first water outlet pipe 18 and a second water outlet pipe 19. Among them, the drain valve 14 is arranged on the first outlet pipe 18, and the water diversion valve 15 is arranged on the second outlet pipe 19. In FIG. 9, the water quality detection device 13 is arranged on the second water outlet pipe 19. In FIG. 10, the water quality detection device 13 is arranged on the common inlet pipe of the first outlet pipe 18 and the second outlet pipe 19. Of course, the examples in FIGS. 9 and 10 do not constitute a restriction on the location of the water quality detection device 13.

Referring to FIG. 9, a water pump 17 is installed on the first water outlet pipe 18, and the water pump 17 is used to pump and deliver water to the refrigerator water supply system. In FIG. 10, the water pump 17 is installed on the common inlet pipe of the first outlet pipe 18 and the second outlet pipe 19. Of course, the installation position of the water pump 17 is not limited and can be any position of the refrigerator water supply system.

Moreover, in addition to providing the water pump 17, any pressure-increasing device or negative pressure device disclosed in the prior art can also be substituted. For example, it is also possible to set an exhaust valve at the position of the current pump in FIGS. 9 and 10, and a negative pressure is formed at the exhaust valve to discharge the water in the refrigerator water supply system.

The water container 12 in the refrigerator water supply system may be a kettle. At this time, the purpose of the water quality detection device 13 is to detect whether the water quality in the kettle meets the requirements.

In addition, it is found from FIG. 10 that the controller 16 is connected to the user interface 20, and can then display the situation of the refrigerator water supply system and receive external instructions based on the user interface 20.

According to one of the embodiments of the present application, there is provided a refrigerator including the above refrigerator water supply system.

Among them, the water container 12 of the refrigerator water supply system can be arranged in a compartment of the refrigerator, preferably a refrigerated compartment, so as to provide cool drinking water in summer.

The above implementations are only used to illustrate the application, but not to limit the application. Although the application has been described in detail with reference to the embodiments, those of ordinary skill in the art should understand that various combinations, modifications, or equivalent replacements of the technical solutions of the application do not depart from the spirit and scope of the technical solutions of the application, and should cover Within the scope of the claims of this application.

Industrial applicability

This application relates to a water quality detection device, a refrigerator water supply system, and a refrigerator, wherein the water quality detection device avoids being combined with a water tank, thereby avoiding leakage at the junction. In addition, because the flow velocity in the connecting pipe section is greater than that of the water inlet pipe section, the water flow in the connecting pipe section realizes a local acceleration, so that the water quality detection probe protruding into the connecting pipe section is scoured by the water flow to avoid impurity deposits on the surface of the water quality detection probe. Improve detection accuracy. Since the water quality detection probe is not affected by the accumulation of impurities, the service life of the water quality detection device can be extended.

Claims (14)

1. A water quality detection device, which is characterized in that it comprises an installation pipeline and a water quality detection probe. The installation pipeline includes a water inlet pipe section, a water outlet pipe section, and a connecting pipe section connecting the water inlet pipe section and the water outlet pipe section. And the connecting pipe section is configured such that when water flows through the installation pipe, the flow velocity in the connecting pipe section is greater than that of the water inlet pipe section; the water quality detection probe is installed on the connecting pipe section and extends Into the connecting pipe section.
2. The water quality detection device according to claim 1, wherein the cross-sectional area of the water inlet pipe section is larger than the cross-sectional area of the connecting pipe section.
3. The water quality detection device according to claim 1, wherein the water inlet pipe section and the connecting pipe section extend along different axes, and the water inlet pipe section and the connecting pipe section are configured as: the installation pipe In the case of water flow in the middle, the gravitational potential energy of the water in the inlet pipe section is higher than the gravitational potential energy of the water in the connecting pipe section.
4. The water quality detection device according to claim 1, wherein the water inlet pipe section is a curved pipe section, and the connecting pipe section is a straight pipe section.
5. The water quality detection device according to any one of claims 1 to 4, wherein the water quality detection probe is an electrode pair.
6. The water quality detection device according to claim 5, wherein the connecting pipe section partially bulges outward to form a mounting recess for the electrode pair.
7. The water quality detection device according to claim 5, wherein the electrode pair comprises a positive electrode and a negative electrode, and the end of the positive electrode and the end of the negative electrode are both flush with the inner wall of the connecting pipe section. Qi.
8. The water quality detection device according to claim 5, wherein the electrode pair includes a positive electrode and a negative electrode, and the end of the positive electrode and the end of the negative electrode are convex relative to the inner wall of the connecting pipe section. Out.
9. The water quality detection device according to claim 5, wherein the electrode pair comprises a positive electrode and a negative electrode, and the positive electrode and the negative electrode are arranged coaxially.
10. The water quality detection device according to claim 5, wherein the electrode pair comprises a positive electrode and a negative electrode, and the positive electrode and the negative electrode are arranged on the same side of the connecting pipe section.
11. The water quality detection device according to any one of claims 1 to 4, wherein the water quality detection probe is a laser light source and a receiving screen.
12. The water quality detection device according to any one of claims 1 to 4, wherein the inner wall of the inlet pipe section and the inner wall of the outlet pipe section are both provided with a first groove and a second groove, and The first groove is located on a side of the second groove away from the connecting pipe section, a clamp ring is fixed in the first groove, and a sealing ring is fixed in the second groove.
13. A water supply system for a refrigerator, comprising a water container and a water outlet pipe connected to the water container, wherein the water quality detection device according to any one of claims 1 to 12 is provided on the water outlet pipe.
14. A refrigerator, characterized by comprising the refrigerator water supply system according to claim 13.

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