Instantaneous water purifier

Abstract

The utility model discloses a kind of instant waterway systems of net drinking machine, belong to net drinking machine field.The utility model includes: instant body, the import of outlet end connection reversing valve, the first outlet of reversing valve is connected hot water outlet pipe;Thermal box, the first import of thermal box is communicated with the second outlet of reversing valve by heat preservation inlet pipe, the heat preservation water outlet of thermal box is communicated with instant inlet pipe by heat preservation outlet pipe, and water pump b is equipped on heat preservation outlet pipe;Outer return pipe, the import end of outer return pipe is communicated hot water outlet pipe, the export end of outer return pipe is communicated between instant body export end and reversing valve import, and outer return control valve is equipped on outer return pipe.The utility model can directly flow the stored water in the interior of hot water outlet pipe to thermal box after user hot water water taking ends, to avoid the problem that water temperature does not reach standard due to residual water in pipeline, further guarantee hot water outlet temperature accuracy, also effectively avoid hot water waste.

Description

Technical Field

[0001] This utility model relates to the field of water purifier technology, and more specifically, to a water circuit system for an instant hot water purifier. Background Technology

[0002] As people's demands for drinking water quality and ease of use increase, water purifiers, with their integrated purification and heating functions, are widely used in homes, offices, and public places. Currently, most high-end water purifiers on the market use instant heating technology to meet users' immediate need for hot water. However, instant heating is limited by power and flow rate, and is prone to problems such as insufficient heating rate and substandard water temperature.

[0003] To improve the stability of hot water supply, some designs enhance performance by increasing the heating element's power or adding a preheating module. For example, some water purifiers employ a "preheating + secondary heating" design, preheating and storing the water at a low temperature before the user draws it, then reheating it using an instant heating element to improve the outlet water temperature and response speed. However, in practical applications, especially when heating water again after a long interval, the problem of poor outlet water temperature stability and a significant deviation between the actual and set temperatures cannot be avoided, affecting the user experience. Utility Model Content

[0004] 1. Technical problem to be solved by the utility model In view of the problem that the hot water output temperature of the existing instant hot water purifier is unstable and there is temperature deviation, this utility model intends to provide a water circuit system for the instant hot water purifier, which can effectively improve the accuracy of the instant hot water output temperature, ensure the stability of hot water supply, and optimize the user experience.

[0005] 2. Technical Solution To achieve the above objectives, the technical solution provided by this utility model is as follows: This utility model discloses an instant hot water purifier water circuit system, comprising: The instantaneous heating element has its inlet end connected to the outlet of the main water supply pipe through the instantaneous hot water inlet pipe, and its outlet end connected to the inlet of the reversing valve. The first outlet of the reversing valve is connected to the hot water outlet pipe. The insulated box has a first inlet connected to the second outlet of the reversing valve via an insulated water inlet pipe, and an insulated water outlet connected to an instant hot water inlet pipe via an insulated water outlet pipe. A water pump b is installed on the insulated water outlet pipe. The external return pipe has its inlet end connected to the hot water outlet pipe and its outlet end connected between the outlet end of the instantaneous heating element and the inlet of the reversing valve. An external return control valve is installed on the external return pipe.

[0006] This utility model provides another instant hot water purifier water circuit system, including: The instantaneous heating element has its inlet end connected to the outlet of the main water supply pipe through the instantaneous hot water inlet pipe, and its outlet end connected to the inlet of the reversing valve. The first outlet of the reversing valve is connected to the hot water outlet pipe. The insulated box has a first inlet connected to the second outlet of the reversing valve via an insulated water inlet pipe, and an insulated water outlet connected to an instant hot water inlet pipe via an insulated water outlet pipe. A water pump b is installed on the insulated water outlet pipe. The external return water pipe has its inlet end connected to the hot water outlet pipe and its outlet end connected to the insulated water inlet pipe. The external return water pipe is equipped with an external return water solenoid valve.

[0007] Furthermore, it also includes a water supply pipe. The second inlet of the insulated box is connected to the outlet of the main water supply pipe through the water supply pipe, and a water supply valve is installed on the water supply pipe.

[0008] Furthermore, it also includes a filter element assembly, the pure water outlet of which is connected to a pure water pipe, and the outlet of the pure water pipe is connected to a normal temperature water outlet pipe and a main water supply pipe, respectively. The main water supply pipe is also equipped with a distribution valve and a negative pressure valve. The distribution valve has an inlet a that is connected to the normal temperature water outlet pipe through the distribution return water pipe, and an outlet b that is connected to the negative pressure valve. A water pump a is installed on the main water supply pipe downstream of the negative pressure valve.

[0009] Furthermore, the filter assembly includes a first filter element and an RO membrane filter element. The outlet of the first filter element is connected to the inlet of the RO membrane filter element through a first purified water pipe. An inlet valve and a booster pump are provided on the first purified water pipe along the water flow direction. The distribution valve has an inlet c and an outlet d. The inlet c is connected to the outlet of the inlet valve, and the outlet d is connected to the inlet of the booster pump. The distribution valve is used to return excess water from the normal temperature outlet pipe to the booster pump.

[0010] Furthermore, a one-way valve a and a normal temperature solenoid valve are sequentially installed on the normal temperature water outlet pipe along the water flow direction; the connection point between the distribution return water pipe and the normal temperature water outlet pipe is located upstream of the one-way valve a.

[0011] Furthermore, an outlet valve and a check valve b are sequentially installed along the water flow direction on the instantaneous hot water inlet pipe, and the outlet of the insulated water outlet pipe is connected to the downstream of the check valve b.

[0012] Furthermore, it also includes a drain pipe; the inlet of the drain pipe is connected to the ambient temperature water outlet pipe, and the outlet of the drain pipe is connected to the wastewater pipe of the RO membrane filter element. The drain pipe is equipped with a drain valve and a drain check valve.

[0013] Furthermore, the first and second inlets of the insulated box are located at the top of the insulated box, and the insulated water outlet is located at the bottom of the insulated box, with the first inlet, the second inlet, and the insulated water outlet on the same side along the length of the box.

[0014] Furthermore, a protective plate is installed inside the insulation box above the insulation outlet. The protective plate extends to cover and exceed the diameter of the insulation outlet, forming a flow space of a certain height between the protective plate and the insulation outlet.

[0015] 3. Beneficial effects Compared with the prior art, the technical solution provided by this utility model has the following advantages: (1) The water system of this utility model can realize the function of water preheating and heat preservation by using the combination of the heat preservation box and the instant heating element, and improve the heating rate of the instant heating element, which helps to improve the accuracy of the hot water outlet temperature and the outlet rate; and by setting an external return pipe, when the user finishes taking hot water, the water stored in the hot water outlet pipe can be directly returned to the heat preservation box, thereby avoiding the problem of the outlet temperature not meeting the standard due to residual water in the pipe, further ensuring the accuracy of the hot water outlet temperature, and also effectively avoiding hot water waste.

[0016] (2) The water system of this utility model adopts a dual water replenishment mode for the heat preservation box and is equipped with a water replenishment pipe, which can directly replenish the purified pure water into the heat preservation box, avoiding the situation of a sudden drop in hot water flow due to the untimely replenishment of the instantaneous heating element, which helps to improve the user experience.

[0017] (3) The water system of this utility model adopts the top water inlet and bottom water outlet method of the heat preservation box, which is not only conducive to the water pump b to fully pump water, but also conducive to the automatic internal circulation of hot and cold water inside the box, ensuring the full mixing and temperature balance of water temperature inside the box, and can provide water with a certain preheating temperature to the instantaneous heat source, thereby improving the heating rate.

[0018] (4) The water system of this utility model is equipped with a protective plate above the insulated water outlet of the insulated box, which effectively alleviates the formation of vortex and protects the insulated water outlet, avoids direct impact from water entering from the top, avoids the introduction of a large amount of air and the further generation of bubbles, thereby further ensuring the stability of hot water output and effectively improving the user experience. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the water system structure in the embodiment; Figure 2 This is a schematic diagram of another design scheme for the water system in the embodiment; Figure 3 This is a schematic diagram of the structure of the insulation box in the embodiment; Figure 4 This is a schematic diagram of the internal structure of the insulated box in the embodiment.

[0020] Explanation of the labels in the diagram: 100. First filter element; 110. First purified water pipe; 111. Inlet valve; 112. Distribution valve; 113. Booster pump; 200. RO membrane filter element; 210. Wastewater pipe; 220. Second purified water pipe; 230. Pure water pipe; 240. Return pipe; 241. Return valve; 242. Return check valve; 250. External outlet pipe; 260. Normal temperature water outlet pipe; 261. One-way valve a; 262. Normal temperature solenoid valve; 270. Distribution return water pipe; 280. Main water supply pipe; 281. Negative pressure valve; 282. Water pump a; 290. Drain pipe; 291. Drain valve; 292. Drain check valve; 300. Instantaneous heating element; 310. Instantaneous heating inlet pipe; 311. Outlet valve; 312. Check valve b; 313. Flow meter; 314. Reversing valve; 320. External return pipe; 321. External return control valve; 330. Hot water outlet pipe; 340. External return pipe; 341. External return solenoid valve; 400. Insulated box; 410. Water supply pipe; 411. Water supply valve; 420. Insulated water outlet pipe; 421. Water pump b; 430. Insulated water inlet pipe; 440. Insulated drain pipe; 450. Protective plate; 451. Support unit; 452. Installation unit; 460. Box bottom plate; 461. Insulated water outlet; 462. Insulated drain outlet. Detailed Implementation

[0021] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0022] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Furthermore, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection of two components. The terms "first," "second," "third," and "fourth" should also be interpreted broadly, merely to distinguish feature names and not to indicate a specific sequential relationship. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] The present invention will be further described below with reference to the embodiments.

[0025] Example Combination Figure 1 As shown, this embodiment first provides a water circuit system for an instant hot water purifier, including: The instantaneous heating element 300 has its inlet end connected to the outlet of the main water supply pipe 280 via the instantaneous hot water inlet pipe 310, and its outlet end connected to the inlet of the reversing valve 314. The first outlet of the reversing valve 314 is connected to the hot water outlet pipe 330. The insulation box 400 has a first inlet connected to the second outlet of the reversing valve 314 via an insulation water inlet pipe 430. The insulation water outlet 461 of the insulation box 400 is connected to the instant hot water inlet pipe 310 via an insulation water outlet pipe 420. A water pump b421 is installed on the insulation water outlet pipe 420. An external return pipe 320 is provided. The inlet end of the external return pipe 320 is connected to the hot water outlet pipe 330, and the outlet end of the external return pipe 320 is connected between the outlet end of the instantaneous heating element 300 and the inlet of the reversing valve 314. An external return control valve 321 is provided on the external return pipe 320.

[0026] Combination Figure 1 As shown, the main water supply pipe 280 is used to transport purified pure water. A circulating flow path is formed between the instantaneous heating element 300 and the insulation box 400 using the insulated water inlet pipe 430 and the insulated water outlet pipe 420. The heated pure water can be sent to the insulation box 400 for storage. When needed, the water pump b421 sends the preheated pure water in the insulation box 400 back to the instantaneous heating element 300 for secondary heating, thereby effectively improving the heating rate of the instantaneous heating element 300 and ensuring the accuracy of the hot water outlet temperature and the outlet rate.

[0027] It should be noted that when the user finishes drawing hot water, there will still be some water inside the hot water outlet pipe 330. Especially for under-sink units, the hot water outlet pipe 330 is longer and contains more water. When the user draws water again after a long interval, the water remaining in the pipe is already at room temperature. The newly heated hot water needs to drain the water first, which will result in the initial water temperature being far below the set temperature. The overall water temperature will also fail to reach the set temperature, leading to a poor user experience.

[0028] This embodiment, through the cooperation of an external return pipe 320 and an external return control valve 321, allows the water stored inside the hot water outlet pipe 330 to flow back directly after the user finishes drawing hot water. The water flows back through the second outlet of the reversing valve 314 and the insulated inlet pipe 430 to the insulation tank 400. The next time hot water is dispensed, it can directly release heated pure water, thus avoiding the problem of substandard temperature caused by residual water. This effectively ensures the accuracy of the hot water outlet temperature and also effectively prevents hot water waste by returning the stored hot water inside the pipe to the insulation tank 400, ensuring sufficient water storage in the insulation tank 400. Furthermore, the external return control valve 321 is preferably a one-way valve, allowing for automatic water return when hot water drawing stops. This design is not only simple in structure and lower in valve assembly cost, but also helps simplify the circuit control logic and wiring distribution, making it quite practical.

[0029] To enable the return flow of stored water inside the hot water outlet pipe 330, as another implementation scheme, combined with Figure 2 As shown, an external return water pipe 340 can also be installed. The inlet end of the external return water pipe 340 is connected to the hot water outlet pipe 330, and the outlet end of the external return water pipe 340 is connected to the insulated water inlet pipe 430. An external return water solenoid valve 341 is installed on the external return water pipe 340. By directly connecting the external return water pipe 340 to the hot water outlet pipe 330 and the insulated water inlet pipe 430, the external return water solenoid valve 341 can be controlled to open and close. After the hot water intake is completed, the water stored in the pipe will flow directly back into the insulated tank 400.

[0030] Furthermore, in practice, the insulation box 400 preferably adopts a dual water replenishment mode, that is, the insulation box 400 has a first inlet and a second inlet. The first inlet is connected to the second outlet of the reversing valve 314 through the insulated water inlet pipe 430, and the second inlet is connected to the outlet of the main water supply pipe 280 through the water replenishment pipe 410. The water replenishment pipe 410 is equipped with a water replenishment valve 411. In this embodiment, in addition to replenishing water to the insulation box 400 using the instant heating element 300, a water replenishment pipe 410 is also provided. Opening the water replenishment valve 411 can directly connect the main water supply pipe 280 to the insulation box 400, directly replenishing pure water into the insulation box 400. When the liquid level in the insulation box 400 is significantly insufficient, water can be quickly replenished to ensure a sufficient supply to the instant heating element 300, avoiding a sharp drop in hot water flow due to untimely water replenishment to the instant heating element 300, which helps to improve the user experience.

[0031] Secondly, in this embodiment, the insulation box 400 is optimized simultaneously. The first inlet and the second inlet of the insulation box 400 are located at the top of the insulation box 400, and the insulation outlet 461 is located at the bottom of the insulation box 400, specifically on the bottom plate 460. Furthermore, the first inlet, the second inlet, and the insulation outlet 461 are all located on the same side along the length of the box. Figure 3 and Figure 4 As shown, the left and right sides of the tank are its length directions. With the center of the tank's length as the boundary, the first inlet, the second inlet, and the insulated water outlet 461 are all located on the left side of the tank, or all on the right side. The top-inlet and bottom-outlet design not only facilitates efficient water pumping by the water pump b421 but also promotes automatic internal circulation of hot and cold water within the tank, ensuring thorough mixing and temperature balance of the water. This allows the water to be preheated to the instantaneous heating element 300, increasing the heating rate. Furthermore, having all the inlets on the same side facilitates centralized pipe distribution, saves internal space, and allows for unified installation and maintenance.

[0032] The purified water path at the front end of the main water supply pipe 280 in this embodiment is further described below. Furthermore, it also includes a filter element assembly. The pure water outlet end of the filter element assembly is connected to a pure water pipe 230. The outlet end of the pure water pipe 230 is connected to both the normal temperature water outlet pipe 260 and the main water supply pipe 280. The normal temperature water outlet pipe 260 is also equipped with a one-way valve a261 and a normal temperature solenoid valve 262 in sequence. The outlet of the normal temperature water outlet pipe 260 is the normal temperature water inlet, and the outlet of the hot water outlet pipe 330 is the warm water inlet. The separate setting of the normal temperature water outlet pipe 260 also facilitates the separate, high-flow-rate output of normal temperature water.

[0033] Specifically, the filter element assembly includes a first filter element 100 and an RO membrane filter element 200. The first filter element 100 can be a composite filter element with pre- and post-filters. The outlet of the pre-filter element is connected to the inlet of the RO membrane filter element 200 through a first purified water pipe 110. The first purified water pipe 110 is provided with an inlet valve 111, a distribution valve 112, and a booster pump 113 in sequence along the water flow direction. The outlet of the RO membrane filter element 200 is connected to the inlet of the post-filter element through a second purified water pipe 220. The outlet of the post-filter element is the pure water outlet end of the entire filter element assembly and is connected to a pure water pipe 230. The second purified water pipe 220 is also connected to a return pipe 240. The inlet of the return pipe 240 is connected to the second purified water pipe 220, and the outlet of the return pipe 240 is connected to the booster pump 113. The return pipe 240 is equipped with a return valve 241 and a return check valve 242 in sequence along the water flow direction, which are used to return the water purified by the RO membrane filter element 200 to the front of the RO membrane filter element 200 to rinse the RO membrane.

[0034] The following further elaborates on the specific settings of the distribution valve 112. In this embodiment, by setting the distribution valve 112 and the negative pressure valve 281 in combination, the excess water flow in the room temperature water outlet pipe 260 can be returned to the booster pump 113 when room temperature water is taken, thereby adapting to the design of this application without a separate pure water tank, and being able to match the RO membrane filter 200 suitable for large gallons, thereby improving the water purification rate and large flow application.

[0035] Specifically, the distribution valve 112 has an inlet a, an outlet b, an inlet c, and an outlet d. Inlet c and outlet d are connected to the first purified water pipe 110. Inlet c is connected to the outlet of the inlet valve 111, and outlet d is connected to the inlet of the booster pump 113, supplying pre-purified water to the booster pump 113. Inlet a is connected to the ambient temperature outlet pipe 260 via the distribution return pipe 270, and outlet b is connected to the downstream negative pressure valve 281. The distribution return pipe 270 is specifically connected upstream of the one-way valve a261, so that when ambient temperature water is no longer being used in the ambient temperature outlet pipe 260, the water stored in the pipe downstream of the one-way valve a261 can still be retained in the pipe and will not all flow back into the distribution return pipe 270, avoiding a significant delay when ambient temperature water is consumed again. Based on this, the one-way valve a261 is also located closer upstream of the ambient temperature outlet pipe 260 to minimize the backflow of water in the pipe when not using water. A water pump a282 is installed on the main water supply pipe 280 downstream of the negative pressure valve 281, so that the pure water discharged from the normal temperature water outlet pipe 260 can be circulated to the main water supply pipe 280 to supply water to the instantaneous heating element 300 and the heat preservation box 400.

[0036] In practice, to achieve rapid water production with a large flow rate, large-gallon filters are often used, which have high water purification efficiency. However, users generally have a smaller water flow rate when using the ambient temperature outlet pipe 260, which can lead to excess water accumulation in the ambient temperature outlet pipe 260 and increase the pipe pressure. By setting up a distribution valve 112 and a negative pressure valve 281 in conjunction, the inlet a and outlet d of the distribution valve 112 can be unidirectionally connected, so that the excess pure water in the ambient temperature outlet pipe 260 is returned to the booster pump 113 for filtration again through the inlet a and outlet d, so as to effectively ensure the stability of the pipe pressure of the ambient temperature outlet pipe 260.

[0037] Furthermore, in this embodiment, the instant hot water inlet pipe 310 is sequentially equipped with an outlet valve 311, a one-way valve b312, and a flow meter 313 along the water flow direction; the outlet of the insulated water outlet pipe 420 is connected downstream of the one-way valve b312, specifically between the one-way valve b312 and the flow meter 313. In practice, the outlet valve 311 and the water supply valve 411 can be controlled to open simultaneously, supplying water to the instant hot water element 300 while simultaneously supplying water to the insulation tank 400. The water outlet of the instant hot water element 300 can be either discharged to the hot water outlet or supplied to the insulation tank 400. In this way, hot water can be supplied to the insulation tank 400 simultaneously through the water supply pipe 410, or the insulated water inlet pipe 430 and the water supply pipe 410 can be used to supply water to the insulation tank 400 simultaneously, ensuring timely water supply to the insulation tank 400.

[0038] Furthermore, this embodiment also includes a drain pipe 290; the inlet of the drain pipe 290 is connected to the ambient temperature water outlet pipe 260, specifically between the one-way valve a261 and the ambient temperature solenoid valve 262, and is located downstream of the connection point between the distribution return water pipe 270 and the ambient temperature water outlet pipe 260. The outlet of the drain pipe 290 is connected to the wastewater pipe 210 of the RO membrane filter element 200, and a wastewater valve is provided on the wastewater pipe 210. A drain valve 291 and a drain one-way valve 292 are sequentially provided on the drain pipe 290. Through the drain pipe 290, when the machine has not been used for a long time, the stagnant water accumulated in the pipe can be quickly discharged from the wastewater pipe 210 to avoid the stagnant water residue affecting the drinking water quality; or when the machine is used for the first time, a large amount of rinsing wastewater from rinsing the filter element can be quickly discharged.

[0039] Furthermore, this embodiment also includes an external water outlet pipe 250, which is connected in parallel with the ambient temperature water outlet pipe 260 at the outlet end of the pure water pipe 230. The outlet of the external water outlet pipe 250 can serve as a reserved interface for connecting other external user equipment, such as a water dispenser, thereby improving the adaptability and application flexibility of the device.

[0040] The following further describes the insulated box 400 of this embodiment. Furthermore, in conjunction with... Figure 2 and Figure 3As shown, the bottom plate 460 of the insulated box 400 is provided with an insulated water outlet 461 and an insulated drain outlet 462. The insulated water outlet 461 is connected to an insulated water outlet pipe 420 for supplying water to the instantaneous heating element 300, and the insulated drain outlet 462 is connected to an insulated drain pipe 440 for directly discharging stagnant water from the insulated box 400 to the outside of the machine as needed. A protective plate 450 is also provided above the insulated water outlet 461, extending to cover and exceed the aperture of the insulated water outlet 461, specifically extending at least 1 mm beyond the four edges of the insulated water outlet 461. A certain height of flow space is formed between the protective plate 450 and the insulated water outlet 461. More preferably, the protective plate 450 and the insulated water outlet 461 are coaxially distributed, and the extension length and width of the protective plate 450 are both at least 1.5 times the aperture of the insulated water outlet 461, preferably between 1.5 and 3 times. In practice, the specific size can be set to 1.5 times, 1.6 times, 2.2 times, 2.4 times, 2.6 times, 2.8 times, or 3 times the diameter of the 461 insulated water outlet.

[0041] It should be noted that in practice, the water outlet of the insulation box 400 is equipped with a water pump b421 to supply water to the instantaneous heating element 300. When the liquid level in the box is low, the continued pumping of water, along with the rapid discharge of water, can easily form a vortex in the area of ​​the insulation outlet 461, introducing a large amount of air. This further aggravates the generation of air bubbles, which are discharged through the insulation outlet pipe 420, resulting in unstable hot water output. In this embodiment, a protective plate 450 is designed at a certain height above the insulated water outlet 461. The extension range of the protective plate 450 can exceed and cover the aperture of the insulated water outlet 461, thereby blocking the formation path of the vortex directly above the insulated water outlet 461. When the water flows downward to the position of the protective plate 450, it is blocked by the protective plate 450 and the flow direction is changed. It then flows downward to the insulated water outlet 461 through the edge of the protective plate 450. Furthermore, no new vortex will form in the area between the protective plate 450 and the insulated water outlet 461, which effectively alleviates the formation of vortex, avoids the introduction of a large amount of air and the further generation of bubbles, thereby further ensuring the stability of hot water output and effectively improving the user experience.

[0042] To further explain, in this embodiment, a protective plate 450 is provided above the insulated water outlet 461, which can also effectively protect the insulated water outlet 461 and reduce splashing bubbles. In practice, when the liquid level in the insulated tank 400 is low, water needs to be added in time. The water flows directly from the top to the bottom, and the inlet and outlet are on the same side, which can easily cause the water to impact the area of ​​the insulated water outlet 461. Water splashing can also easily lead to the generation of bubbles. In practice, the water replenishment and water discharge of the insulated tank 400 can be carried out at the same time, that is, water is replenished while water is discharged. At this time, the bubbles formed in the area of ​​the insulated water outlet 461 can easily be directly discharged from the insulated water outlet 461, resulting in more bubbles in the pipe.

[0043] In this embodiment, by setting a protective plate 450, not only is the formation of vortex at the insulated water outlet 461 blocked and the introduction of vortex bubbles reduced, but it can also form a protective cover for the insulated water outlet 461. This avoids the direct impact of water flow during water replenishment and reduces the formation of bubbles at the insulated water outlet 461 that directly enter the insulated water outlet 461, further alleviating the bubble problem during the water outlet process.

[0044] Regarding the specific structure of the protective plate 450, various implementation methods can be adopted, combined with Figure 3 As shown, the bottom of the preferred protective plate 450 is provided with a downwardly extending support part 451, and the bottom end of the support part 451 is connected to the bottom of the insulation box 400. More specifically, the protective plate 450 has downwardly extending support portions 451 at both ends along its length. The bottom of the support portions 451 has outwardly extending mounting portions 452 that are fixedly installed at the bottom of the insulation box 400, such as by bolts. Thus, the protective plate 450 is arranged in a Z-shape and can be formed by bending a single plate, which is convenient for processing and shaping. The support portions 451 at both ends provide stable support for the protective plate 450, reducing impact deformation and ensuring stable coverage of the insulation outlet 461. The other two sides of the protective plate 450 are open, that is, the side edges of the support portions 451 at both ends are open. The diverted water flow connects to the insulation outlet 461 through the open areas on both sides of the protective plate 450. The open areas on both sides of the protective plate 450 ensure that the water flow still flows fully to the insulation outlet 461 after the diversion, without affecting the large flow of water, and without causing excessive cutting of the water flow, avoiding further generation of air bubbles and ensuring the stability of the water output.

[0045] The water system in this embodiment, through the cooperation of the insulation tank 400 and the instant heating element 300, can realize hot water preheating and secondary heating modes, improving the accuracy of hot water outlet temperature and water flow rate. At the same time, the insulation tank 400 is replenished with water through multiple channels to ensure the water level in the tank and avoid a sharp drop in hot water flow rate due to insufficient water level. Furthermore, through the external return pipe 320 or external return water pipe 340, the residual hot water in the pipe can be returned to the insulation tank 400 in a timely manner after hot water is taken, so that hot water can be directly discharged when hot water is taken next, ensuring the accuracy of hot water temperature and improving the user experience.

[0046] The scope of protection of this utility model is defined only by the claims. Thanks to the teachings of this utility model, those skilled in the art will readily recognize that alternative structures to the disclosed structure can be used as feasible alternative implementations, and that the disclosed implementations can be combined to produce new implementations, which also fall within the scope of the appended claims.

Claims

1. A water circuit system for an instant hot water purifier, characterized in that, include: The instantaneous heating element (300) is connected to the outlet of the main water supply pipe (280) through the instantaneous hot water inlet pipe (310) at its inlet end, and the outlet end is connected to the inlet of the reversing valve (314). The first outlet of the reversing valve (314) is connected to the hot water outlet pipe (330). The insulated box (400) has a first inlet connected to the second outlet of the reversing valve (314) via an insulated water inlet pipe (430), and an insulated water outlet (461) of the insulated box (400) connected to an instant hot water inlet pipe (310) via an insulated water outlet pipe (420). A water pump b (421) is installed on the insulated water outlet pipe (420). An external return pipe (320) is provided. The inlet end of the external return pipe (320) is connected to the hot water outlet pipe (330), and the outlet end of the external return pipe (320) is connected between the outlet end of the instantaneous heat source (300) and the inlet of the reversing valve (314). An external return control valve (321) is provided on the external return pipe (320).

2. A water circuit system for an instant hot water purifier, characterized in that, include: The instantaneous heating element (300) is connected to the outlet of the main water supply pipe (280) through the instantaneous hot water inlet pipe (310) at its inlet end, and the outlet end is connected to the inlet of the reversing valve (314). The first outlet of the reversing valve (314) is connected to the hot water outlet pipe (330). The insulated box (400) has a first inlet connected to the second outlet of the reversing valve (314) via an insulated water inlet pipe (430), and an insulated water outlet (461) of the insulated box (400) connected to an instant hot water inlet pipe (310) via an insulated water outlet pipe (420). A water pump b (421) is installed on the insulated water outlet pipe (420). An external return water pipe (340) is provided. The inlet end of the external return water pipe (340) is connected to the hot water outlet pipe (330), and the outlet end of the external return water pipe (340) is connected to the heat-insulated inlet water pipe (430). An external return water solenoid valve (341) is provided on the external return water pipe (340).

3. The water circuit system of an instant hot water purifier according to claim 1 or 2, characterized in that: It also includes a water supply pipe (410), the second inlet of the insulation box (400) is connected to the outlet of the main water supply pipe (280) through the water supply pipe (410), and a water supply valve (411) is provided on the water supply pipe (410).

4. The water circuit system of an instant hot water purifier according to claim 1 or 2, characterized in that: It also includes a filter element assembly, the pure water outlet end of the filter element assembly is connected to a pure water pipe (230), and the outlet end of the pure water pipe (230) is connected to a normal temperature water outlet pipe (260) and a main water supply pipe (280) respectively. The main water supply pipe (280) is also equipped with a distribution valve (112) and a negative pressure valve (281). The distribution valve (112) has an inlet a connected to the normal temperature outlet pipe (260) through the distribution return water pipe (270) and an outlet b connected to the negative pressure valve (281). A water pump a (282) is provided on the main water supply pipe (280) downstream of the negative pressure valve (281).

5. The water circuit system of an instant hot water purifier according to claim 4, characterized in that: The filter assembly includes a first filter element (100) and an RO membrane filter element (200). The outlet of the first filter element (100) is connected to the inlet of the RO membrane filter element (200) through a first water purification pipe (110). An inlet valve (111) and a booster pump (113) are provided on the first water purification pipe (110) along the water flow direction. The distribution valve (112) has an inlet c and an outlet d, the inlet c being connected to the outlet of the inlet valve (111) and the outlet d being connected to the inlet of the booster pump (113); the distribution valve (112) is used to return excess water from the normal temperature outlet pipe (260) to before the booster pump (113).

6. The water circuit system of an instant hot water purifier according to claim 4, characterized in that: A one-way valve a (261) and a normal temperature solenoid valve (262) are sequentially installed on the normal temperature water outlet pipe (260) along the water flow direction; the connection position between the distribution return water pipe (270) and the normal temperature water outlet pipe (260) is upstream of the one-way valve a (261).

7. The water circuit system of an instant hot water purifier according to claim 1 or 2, characterized in that: The hot water inlet pipe (310) is provided with an outlet valve (311) and a one-way valve b (312) in sequence along the water flow direction. The outlet of the heat-insulated water outlet pipe (420) is connected to the downstream of the one-way valve b (312).

8. The water circuit system of an instant hot water purifier according to claim 5, characterized in that: It also includes a drain pipe (290); the inlet of the drain pipe (290) is connected to the ambient temperature outlet pipe (260), the outlet of the drain pipe (290) is connected to the wastewater pipe (210) of the RO membrane filter element (200), and the drain pipe (290) is equipped with a drain valve (291) and a drain check valve (292).

9. The water circuit system of an instant hot water purifier according to claim 3, characterized in that: The first inlet and the second inlet of the insulated box (400) are located at the top of the insulated box (400), and the insulated water outlet (461) is located at the bottom of the insulated box (400). The first inlet, the second inlet and the insulated water outlet (461) are on the same side of the length direction of the box.

10. The water circuit system of an instant hot water purifier according to claim 9, characterized in that: Inside the insulation box (400), above the insulation outlet (461), there is also a protective plate (450). The protective plate (450) extends to cover and exceed the aperture of the insulation outlet (461), and a certain height of flow space is formed between the protective plate (450) and the insulation outlet (461).

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