A waterway system of a pure drinking machine

Abstract

The utility model discloses a kind of waterway systems of pure drinking machine, belong to domestic appliance technical field.The utility model includes: independently arranged water purification unit, for making pure water and being provided with pure water output end;Independently arranged drinking water unit, for processing pure water and outputting water of different temperature;Independently arranged external pure water tank, for storing pure water;Wherein, water purification unit, external pure water tank and drinking water unit are detachably connected, constitute following any one combination form: (a) water purification unit and drinking water unit are assembled as a whole side by side, and the pure water output end of water purification unit is communicated with the water inlet interface of drinking water unit;(b) connecting pipeline is arranged between water purification unit and drinking water unit, and split type installation is carried out, and water purification unit supplies water to drinking water unit by connecting pipeline;(c) external pure water tank and drinking water unit are assembled as a whole, and external pure water tank supplies water to drinking water unit.The utility model can be flexibly combined according to actual demand of user, present multiple forms, and improve the adaptability of application scene.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to a water system for a water purifier. Background Technology

[0002] As an indispensable infrastructure in modern life and work, drinking water equipment has evolved from traditional models that connect to bottled water to today's smart models that connect directly to tap water. Drinking water equipment is no longer a simple "water boiling tool," but a silent health steward in modern life.

[0003] In existing water purifier technology, traditional water system designs have many limitations, restricting product flexibility and user experience. The most prominent problem lies in their often fixed, integrated or simple split-type designs. While integrated water purifiers are easy to install, their water purification and drinking functions are combined into one unit, usually resulting in a bulky size that requires significant countertop space, making them unsuitable for scenarios with limited kitchen space or where multiple water points need to be accessed in the living room, study, or other locations. Early, simple split-type designs lack coordination between individual devices and often cannot guarantee a smooth supply of purified water, preventing users from freely combining them according to their actual living environment and usage needs. Utility Model Content

[0004] 1. Technical problem to be solved by the utility model In view of the problems existing in the prior art, this utility model provides a water circuit system for a water purifier. This utility model adopts a modular design with three independent units: a water purification unit, a water drinking unit, and an external pure water tank. The three independent units can be combined or separated, and can be flexibly combined according to the actual needs of users to present multiple forms, thereby improving the adaptability of application scenarios.

[0005] 2. Technical Solution To achieve the above objectives, the technical solution provided by this utility model is as follows: This utility model discloses a water system for a water purifier, comprising: An independently configured water purification unit is used to produce pure water. The water purification unit is provided with two interface areas. The first interface area is provided with a raw water interface and a wastewater interface for raw water input and wastewater discharge. The second interface area is provided with a water outlet interface for outputting pure water. An independently set drinking water unit is used to process pure water and output water at different temperatures. The drinking water unit is provided with an interface setting area, which is provided with a water inlet interface. An independently designed external pure water tank is used to store pure water; The water purification unit, drinking water unit, and external pure water tank are selectively used according to actual combination requirements and can form any of the following combination configurations: (a) The water purification unit and the drinking water unit are assembled side by side as one unit, and the water purification unit is connected to the water inlet of the drinking water unit through the water outlet of the second interface area; (b) A connecting pipeline is installed between the water purification unit and the drinking water unit for separate installation. The water outlet of the second interface area of ​​the water purification unit is connected to the water inlet of the interface setting area of ​​the drinking water unit through the connecting pipeline. (c) The external pure water tank and the drinking water unit are assembled as one unit, and the outlet of the external pure water tank is connected to the inlet of the drinking water unit interface setting area.

[0006] Furthermore, the water purification unit includes multiple filter cartridges connected in sequence. The water purification unit is also equipped with a distribution valve. The first inlet of the distribution valve is connected to the pre-stage filter cartridge via an inlet solenoid valve. The first outlet of the distribution valve is connected to the post-stage filter cartridge. The post-stage filter cartridge has at least one filter cartridge. The outlet of the post-stage filter cartridge is connected to the second inlet of the distribution valve. The second outlet of the distribution valve is connected to the water outlet. The distribution valve is used to dynamically distribute excess pure water and guide the excess pure water back to the front end of the inlet of the post-stage filter cartridge.

[0007] Furthermore, the water purification unit is equipped with a backwash water circuit, which includes a backwash solenoid valve, a backwash water tank, a diaphragm pump A, and a one-way valve B connected in sequence; wherein the backwash solenoid valve is located between the pure water outlet of the RO filter element and the backwash water tank, the inlet of the diaphragm pump A is connected to the outlet of the backwash water tank, and the outlet of the diaphragm pump A is connected to the pipeline between the outlet of the booster pump and the inlet of the RO filter element via the one-way valve B.

[0008] Furthermore, the flushing water tank is equipped only with a high liquid level sensor, and the flushing water tank is emptied when the flushing ends by controlling the running time of the diaphragm pump A.

[0009] Furthermore, the drinking water unit includes a heating water circuit, a cooling water circuit, and a room temperature water circuit connected in parallel; wherein the heating water circuit includes a one-way valve C and an instant heating module connected in sequence; the cooling water circuit includes a one-way valve D, a diaphragm pump B, and a cooling tank connected in sequence; the room temperature water circuit includes a one-way valve E and a zero-pressure valve connected in sequence; a negative pressure valve is provided upstream of the parallel water circuits of the heating water circuit and the cooling water circuit, and the inlet of the negative pressure valve is connected to the water inlet of the drinking water unit.

[0010] Furthermore, in the combination configuration of the drinking water unit and the water purification unit, the negative pressure valve is connected to the second outlet of the distribution valve. The negative pressure valve adjusts the flow rate of pure water flowing into the heating water circuit or the cooling water circuit based on the flow requirements of the heating water circuit or the cooling water circuit. Excess pure water flows back to the front end of the RO filter element through the distribution valve.

[0011] Furthermore, the water inlet of the drinking water unit is equipped with a three-way valve. The first end of the three-way valve is connected to the water inlet of the interface setting area. The interface setting area is also equipped with a wastewater discharge interface. The second end of the three-way valve is connected to the wastewater discharge interface, and the third end of the three-way valve is connected to the internal water circuit of the drinking water unit.

[0012] Furthermore, the second interface area of ​​the water purification unit is provided with a return water interface. In the combination configuration of the drinking water unit and the water purification unit, the wastewater discharge interface is connected to the return water interface of the second interface area, and the wastewater is discharged through the wastewater interface of the first interface area via the return water pipe. A return water solenoid valve and a one-way valve F are sequentially installed on the return water pipe.

[0013] Furthermore, a raw water TDS sensor is provided between the pre-filter and the inlet solenoid valve, and a high-pressure switch and a pure water TDS sensor are provided between the one-way valve A and the post-filter; a wastewater solenoid valve is provided at the wastewater outlet of the RO filter to control the discharge of wastewater through the wastewater interface of the water purification unit.

[0014] Furthermore, an interface for installing a pure water faucet is reserved on the pipeline between the post-filter and the distribution valve. This pure water faucet interface is located in the first interface area of ​​the water purification unit. Users can choose to install a pure water faucet and supply pure water directly to the external pure water tank through the pure water faucet.

[0015] 3. Beneficial effects Compared with existing known technologies, the technical solution provided by this utility model has the following significant advantages: (1) This utility model adopts a modular design with three independent units: a water purification unit, a drinking water unit, and an external pure water tank. The three independent units can be combined or separated. The water purification unit can be installed independently under the sink to produce water, the drinking water unit can be placed independently on the countertop to provide instant drinking water, and the external pure water tank serves as a mobile water storage container. Users can choose to combine the water purification unit and the drinking water unit directly into a countertop all-in-one machine, or hide the water purification unit under the sink and connect it to the countertop drinking water unit through a pipe, or even separate the water purification unit and place the external pure water tank with the drinking water unit in any area such as the living room or study. For users with small apartments, this design only requires installing the water purification unit under the sink and placing the thin drinking water unit on the countertop to maximize space saving. For scenarios with multiple drinking water points, the water purification unit can continuously supply water to the "drinking water unit + external pure water tank" combination scattered in various places, ensuring a smooth supply of pure water.

[0016] (2) This utility model controls the pure water produced by the RO filter element to be injected into an independent flushing water tank through a flushing solenoid valve. Then, the diaphragm pump A draws pure water from the flushing water tank and pumps it into the front end of the RO filter element inlet to form a flush. The diaphragm pump A replaces the traditional booster pump as the flushing power source. Through program control, the water flow is made to continuously flush the surface of the reverse osmosis membrane at a low flow rate (compared to the high flow rate of the booster pump), which can achieve more efficient flushing of the reverse osmosis membrane. At the same time, by preset the running time of the diaphragm pump A, the water in the flushing water tank is exactly emptied at the end of each flush, eliminating the need for a low liquid level sensor in the flushing water tank and reducing hardware costs.

[0017] (3) This utility model uses the cooperation of a negative pressure valve and a distribution valve. The negative pressure valve adjusts the flow rate of pure water flowing into the heating or cooling water circuit based on the flow demand of the heating or cooling water circuit. Excess pure water flows back to the front end of the RO filter element through the distribution valve, reducing the risk of pipeline pressure fluctuation.

[0018] (4) This utility model is equipped with a three-way valve at the water inlet of the drinking water unit. Its wastewater discharge interface is connected to the wastewater pipeline of the water purification unit through a return water pipe. A return water solenoid valve and a one-way valve F are connected in series on the return water pipe to form a directional wastewater transport. When the highly polluted wastewater generated during the first start-up of the water purifier filter flushing, or when the stagnant water in the pipeline after long-term idleness needs to be discharged, the system opens the return water solenoid valve. The two types of wastewater are switched to the wastewater discharge interface through the three-way valve, and then introduced into the preset wastewater interface of the water purification unit through the return water pipe, and finally discharged by the water purification unit. This design realizes the single-channel centralized treatment of two types of wastewater by utilizing the wastewater discharge system of the water purification unit. Attached Figure Description

[0019] Figure 1 shows (a)-(c) schematic diagrams of three combination methods between the water purification unit, the pure water tank and the drinking water unit; Figure 2 This is a schematic diagram of the water circuit of the water purification unit in this utility model; Figure 3 This is a schematic diagram of the water circuit of the water purification unit in another embodiment of this utility model; Figure 4 This is a schematic diagram of the water circuit of the drinking water unit in this utility model; Figure 5 This is a schematic diagram of the wastewater return water path in another embodiment of the present invention; Figure 6 This is a structural schematic diagram of the water purification unit (without the outer decorative cover) in this utility model; Figure 7 This is a schematic diagram of the drinking water unit (without the outer decorative cover) in this utility model.

[0020] Explanation of the labels in the diagram: 1. Water purification unit; 11. Water circuit board; 12. First interface area; 13. Second interface area; 2. Drinking water unit; 21. Water outlet box; 22. Valve assembly area; 23. Cold tank; 24. Interface area. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of each component in a certain specific posture (the posture of the water purifier when it is in normal use in this utility model). If the specific posture changes, the directional indicators will also change accordingly.

[0023] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0024] Example 1 Referring to Figure 1, the water system of this embodiment for a water purifier adopts a modular design, with its core comprising three independent units: a water purification unit, a drinking water unit, and an external pure water tank. The advantage of this water system is that the three independent units can be combined or separated, allowing for flexible configuration according to actual user needs, presenting various forms and enhancing adaptability to different application scenarios.

[0025] Specifically, the water purification unit is the core purification module of the water system, and its function is to produce pure water. This unit uses a built-in filter cartridge to perform multi-stage filtration of the raw water, removing impurities and contaminants, and outputting pure water that meets drinking standards. Simultaneously, the unit has a reserved pure water faucet interface, through which pure water can be directly supplied to an external pure water tank.

[0026] The drinking water unit is mainly responsible for providing ready-to-drink cold, hot, and room temperature water. An external pure water tank serves as an independent pure water storage container. The pure water it contains can come from the pure water supply provided by the water purification unit through the pure water faucet, or from other water purification products in the user's home.

[0027] Regarding the connection between the water purification unit, the drinking water unit, and the external pure water tank, the water circuit system of this embodiment provides a very flexible combination method: In the first configuration, as shown in Figure 1(a), the water purification unit and the drinking water unit can be assembled as one unit and installed together on a countertop in the user's home. The water purification unit and the drinking water unit are directly connected through a designated interface, and the purified water produced by the water purification unit is directly supplied to the drinking water unit for temperature treatment. In this case, the purified water output of the water purification unit is directly connected to the water inlet of the drinking water unit.

[0028] The second combination, as shown in Figure 1(b), involves installing the water purification unit separately under the countertop (e.g., under the sink) while the drinking water unit is installed on the countertop. The water purification unit and the drinking water unit are connected by a relatively long connecting pipe. In this case, the purified water produced by the water purification unit is delivered to the drinking water unit on the countertop via the pipe.

[0029] The third combination method, as shown in Figure 1(c), allows the drinking water unit to be used in combination with an external pure water tank instead of directly connecting to the water purification unit. After combining the drinking water unit and the external pure water tank, it can be placed in the desired area (such as a living room table). A water tank base is fixed to the side of the drinking water unit, and the interface between the water tank base and the drinking water unit is directly connected. The external pure water tank is directly inserted into the water tank base. The drinking water unit is connected to the external pure water tank through a pipeline, drawing water from the pure water tank for temperature treatment.

[0030] The water system in this embodiment uses standardized interfaces to flexibly connect and separate the water purification unit and the drinking water unit, as well as the drinking water unit and the external pure water tank. Users can choose to install the water purification unit under the sink, placing only the drinking water unit or a combination of the drinking water unit and the external pure water tank on the countertop, saving space. If multiple water points are needed in the home (such as the living room or study), the water purification unit can supply water to the external pure water tank under the sink, and then the external pure water tank can be installed on the drinking water units at the multiple water points, meeting the user's water needs. The water purification unit can be designed with a high flow rate, providing ample pure water supply to the drinking water unit or the external pure water tank, ensuring efficient water production speed and avoiding the inconvenience of frequent water changes.

[0031] Example 2 Combination Figure 2 This embodiment of a water purifier system is basically the same as that in Embodiment 1. This embodiment details the design principle of the water purification unit.

[0032] The water purification unit includes multi-stage filter cartridges and a distribution valve. The filter cartridges are connected to the raw water and are used for multi-stage filtration of the raw water. The distribution valve is used to dynamically distribute the purified water produced by the filter cartridges.

[0033] In this embodiment, the filter cartridges include a pre-filter, a post-filter, and an RO filter. The pre-filter is located upstream of the distribution valve, and the first inlet of the distribution valve is connected to the pre-filter via an inlet solenoid valve. That is, the pre-filter is the pre-stage filter cartridge of the distribution valve. The RO and post-filters are located downstream of the distribution valve, meaning that there are two post-stage filters in the distribution valve. Both the RO and post-filters are post-stage filters of the distribution valve. Raw water first flows through the pre-filter (such as PP cotton or activated carbon filter) to intercept large particulate impurities and adsorb residual chlorine and off-colors and odors. Then it enters the RO filter (reverse osmosis membrane), where heavy metals, microorganisms, etc. are efficiently removed under high pressure. Finally, the post-filter (such as activated carbon filter) eliminates residual odors and improves the taste of the water.

[0034] It is worth noting that the pre-filter, post-filter, and RO filter can be all combined, partially combined, or set up separately. A combined setup means that at least two types of filter elements are located in the same filter housing, while a separate setup means that each is located in a separate filter housing. This embodiment uses a composite filter element that combines the pre-filter and post-filter in the same filter housing, along with a separate RO filter element, thus balancing the economy of filter element replacement with ease of maintenance.

[0035] The distribution valve includes a first inlet, a first outlet, a second inlet, and a second outlet. The outlet of the pre-filter is connected to the first inlet of the distribution valve via an inlet solenoid valve, which controls the flow of raw water. The first outlet of the distribution valve is connected to the inlet of a booster pump, and the outlet of the booster pump is connected to the inlet of the RO filter. The booster pump generates high pressure to drive water flow through the reverse osmosis membrane of the RO filter. The pure water outlet of the RO filter is connected to the inlet of the post-filter via a one-way valve A, which prevents backflow of pure water. The outlet of the post-filter is connected to the second inlet of the distribution valve, allowing purified pure water to enter the internal channel of the distribution valve. An interface for installing a pure water faucet is provided on the pipeline between the post-filter and the distribution valve, allowing users to choose whether to install one. The second outlet of the distribution valve serves as the pure water output terminal of the water purification unit, connecting to the inlet of the drinking water unit in scenarios where the water purification unit and the drinking water unit are combined or separate. The aforementioned distribution valve, by switching the interface path, directs excess pure water back to the front end of the RO filter element, thereby dynamically distributing the pure water produced by the filter element and reducing the risk of pipeline pressure fluctuations.

[0036] In addition, this embodiment includes a raw water TDS sensor between the pre-filter and the inlet solenoid valve for real-time monitoring of the incoming water quality. A high-pressure switch and a pure water TDS sensor are installed between the one-way valve A and the post-filter. The high-pressure switch sends a signal to the controller when the pressure in the pure water output pipe of the RO filter exceeds a set threshold, shutting off the booster pump or stopping water production via the inlet solenoid valve. The pure water TDS sensor monitors the quality of the RO filter's produced water. Through the raw water TDS sensor, the pure water TDS sensor, and the high-pressure switch, comprehensive monitoring and anomaly protection for water quality and pressure are achieved. A wastewater solenoid valve is installed downstream of the RO filter's wastewater outlet to control the discharge of wastewater generated by the RO filter through the wastewater interface of the water purification unit.

[0037] Example 3 Combination Figure 3 The water system of the water purifier in this embodiment is basically the same as that in embodiment 2. Based on embodiment 2, this embodiment further improves the backwashing water system design of the water purification unit.

[0038] The backwash water circuit design includes a backwash solenoid valve, a backwash water tank, a diaphragm pump A, and a check valve B connected in sequence. The backwash solenoid valve is located on the pure water pipeline upstream of the post-filter cartridge, with its inlet connected to the pure water outlet of the RO filter cartridge and its outlet connected to the inlet of the backwash water tank. This backwash solenoid valve controls the injection of pure water produced by the RO filter cartridge into the backwash water tank. The outlet of the backwash water tank is connected to the inlet of the diaphragm pump A; the outlet of the diaphragm pump A is connected to the front end of the RO filter cartridge inlet via the check valve B, i.e., between the booster pump outlet and the RO filter cartridge inlet, forming a closed-loop backwash circuit. The check valve B prevents water from flowing back into the backwash water tank, ensuring unidirectional flow.

[0039] When the system triggers the backwashing procedure, diaphragm pump A starts, drawing pure water from the RO filter cartridge stored in the backwash tank and pumping it into the RO filter cartridge inlet. Diaphragm pump A can control the backwash flow rate of the RO filter cartridge to maintain a low flow rate. This ensures a slow and stable flow rate, thoroughly flushing the surface of the reverse osmosis membrane. Furthermore, the running time of diaphragm pump A can be programmed to ensure that the water in the backwash tank is completely emptied at the end of the backwash. Compared to existing technologies that directly use a booster pump for high-flow backwashing, the low-flow backwash of diaphragm pump A extends the backwash time, significantly improving the backwashing efficiency of the reverse osmosis membrane. Moreover, because the running time of diaphragm pump A can be programmed to ensure that the water in the backwash tank is completely emptied at the end of the backwash, the backwash tank only needs a high-level sensor to detect whether the tank is full, eliminating the need for a low-level sensor and reducing component costs.

[0040] Example 4 Combination Figure 4This embodiment further describes the water circuit architecture of the drinking water unit. The drinking water unit includes a heating water circuit, a room temperature water circuit, and a cooling water circuit. Pure water output from the water purification unit or an external pure water tank is input into the heating water circuit, room temperature water circuit, or cooling water circuit of the drinking water unit, respectively. The hot water circuit outputs hot water, the room temperature water circuit outputs room temperature water, and the cooling water circuit outputs cold water. Wherein: The heating water circuit consists of a one-way valve C and an instant heating module connected in series. The output end is connected to a hot water faucet, responsible for instantaneous heating and outputting hot water at a specified temperature. The instant heating module used in this embodiment has a built-in flow meter and a water pump.

[0041] The cooling water system consists of a one-way valve D, a diaphragm pump B, and a cooling tank connected in series, with the output end connected to a cold water tap to realize the preparation and supply of cold water.

[0042] The ambient temperature water circuit consists of a one-way valve E and a zero-pressure valve connected in series. The ambient temperature water circuit is opened and closed by the zero-pressure valve. The output end of the ambient temperature water circuit is shared with the cold water faucet, and ambient temperature water and cold water are output alternately to provide a large flow of ambient temperature pure water.

[0043] In this embodiment, a flow meter is first installed at the water inlet of the drinking water unit. The downstream pipeline of the flow meter is divided into two paths: one path connects to the ambient temperature water path, and the other path connects to the negative pressure valve. The heating water path and the cooling water path form a parallel water path, which is connected to the outlet of the negative pressure valve.

[0044] It is worth noting that the negative pressure valve described in this embodiment plays a crucial role in the drinking water unit. In the scheme connecting the water purification unit to the drinking water unit, the second outlet of the distribution valve is connected to the negative pressure valve. Taking hot water production as an example, the second outlet of the distribution valve is connected sequentially to the negative pressure valve and the instant heating module. The negative pressure valve is used to output the required flow rate of room temperature water, and the instant heating module is used to heat the room temperature water at that flow rate, finally outputting hot water at the corresponding temperature. The negative pressure valve, in conjunction with the water pump built into the instant heating module, achieves flow regulation. When the user selects the hot water setting, the instant heating module needs to be supplied with a corresponding amount of water according to the corresponding hot water temperature. The flow rate into the instant heating module is controlled by the control device to heat the water to the required temperature for use. Excess pure water produced by the water purification unit creates back pressure at the inlet of the negative pressure valve, which is then redistributed back to the inlet of the RO filter via the distribution valve, thereby reducing the risk of pipeline pressure fluctuations.

[0045] The distribution valve and negative pressure valve in the refrigeration water circuit have similar functions, which will not be elaborated here.

[0046] Example 5 Combination Figure 5This embodiment of a water purifier system includes a three-way valve in the drinking water unit for easy switching of water flow direction. Two of the three-way valve's terminals are connected to the drinking water unit's inlet and wastewater outlet, respectively. These two inlets use a standardized threaded design and are located on the outside of the drinking water unit's housing, while the three-way valve itself is located inside the unit. The other terminal of the three-way valve connects to the internal water circuit of the drinking water unit, meaning it is located upstream of the flow meter.

[0047] When a water purification unit is connected to the drinking water unit, the outlet of the purification unit is connected to the inlet of the drinking water unit. Pure water purified by the filter cartridge of the purification unit flows into the drinking water unit through the inlet. The wastewater discharge port of the drinking water unit is connected to the wastewater pipeline of the purification unit via a return pipe. A return water solenoid valve and a one-way valve F are sequentially installed on the return water pipe, forming a closed-loop wastewater diversion channel. The return water solenoid valve controls the opening and closing of the return water pipe, and the one-way valve F prevents backflow of wastewater from the purification unit, directing the wastewater to the wastewater port of the purification unit for centralized discharge.

[0048] When the water purifier is first used, the large amount of wastewater generated during the rinsing of the filter cartridge in the water purification unit can flow into the wastewater pipe of the water purification unit through the wastewater discharge port of the drinking water unit, and then be discharged through the wastewater port of the water purification unit. When the water purification unit is placed under the sink and the drinking water unit is located on the countertop, the connecting pipe between the two units is relatively long. If the water purifier is not used for a long time, stagnant water will accumulate in the connecting pipe. The program can be timed or manually activated to drain the stagnant water in the connecting pipe through the wastewater discharge port into the wastewater pipe of the water purification unit, and then be discharged through the wastewater port of the water purification unit.

[0049] The wastewater discharge interface serves as a connecting hub for the coordinated operation of the drinking water unit and the water purification unit. It unifies the highly polluted wastewater from the initial flushing of the filter element and the stagnant water retained in the long-distance pipeline into the dedicated wastewater pipeline pre-set by the water purification unit, so that the two types of wastewater are discharged centrally through a single channel, thereby improving the wastewater treatment efficiency.

[0050] Example 6 This embodiment further describes the specific mechanical structure design of the water purification unit and drinking water unit to allow for flexible combination: Combination Figure 6The water purification unit 1 has a water circuit board 11 on its rear side. Below the water circuit board 11 is a first interface area 12. The first interface area 12 contains a raw water interface, a wastewater interface, and a pure water faucet interface, all extending along the width of the unit. The distribution order of the three water inlets can be adjusted according to design requirements. The raw water interface is used to connect to the raw water inlet via a pipeline to deliver raw water into the water purification unit. The wastewater interface is used to discharge the generated wastewater. The pure water faucet interface is used to output the pure water finally purified by the water purification unit. This pure water faucet interface is a reserved port, which can be connected to a faucet when needed to directly discharge room temperature purified water for use.

[0051] A second interface area 13 is provided on the adjacent side of the first interface area 12. The second interface area 13 is a dedicated interface area for connecting the drinking water unit 2. The second interface area 13 is provided with a water outlet and a water return interface. The distribution order of the two interfaces can be adjusted according to design requirements.

[0052] The water outlet of water purification unit 1 is connected to the second outlet of the aforementioned distribution valve and to the water inlet of drinking water unit 2, for delivering purified water to drinking water unit 2. The return water interface of water purification unit 1 is connected to the wastewater interface set in the first interface area 12 through the internal water passage of water purification unit 1. This return water interface is connected to the wastewater discharge interface of drinking water unit 2. High-pollution wastewater from the initial flushing of the filter element in water purification unit 1, or when water purification unit 1 and drinking water unit 2 are connected by a long-distance pipeline, is uniformly introduced into the wastewater interface of water purification unit for discharge, realizing centralized wastewater discharge and improving wastewater treatment efficiency.

[0053] Combination Figure 7 The drinking water unit 2 includes a water outlet box 21, a valve assembly area 22, a cold tank 23, and an instant heating element (not shown in the figure). The water outlet box 21, as the core water outlet component of the drinking water unit 2, is located at the top of the middle frame and on one side of the length direction of the middle frame. When not in use, the water outlet box 21 can be retracted into the drinking water unit 2. When in use, the water outlet box 21 can be extended to meet the user's water dispensing needs.

[0054] The valve assembly area 22 centrally houses water circuit control components such as solenoid valves and flow sensors. By optimizing the spatial layout, various valve bodies are arranged compactly, saving internal space and facilitating maintenance and repair. The valve assembly area 22 forms a water circuit connection with the cold tank 23 and the inlet and outlet of the hot water element through interfaces, realizing the switching of hot and cold water circuits and flow regulation.

[0055] The cold tank 23 is located inside the rear side of the middle frame. The cold tank 23 is controlled by the valve group setting area 22 to form a complementary water supply with the instant heating element. When the user selects cold water, the water flows through the cold tank 23 and is cooled before being output. When the user selects hot water, the water flows through the instant heating element and is heated before being output.

[0056] In this embodiment, the drinking water unit 2 has an interface setting area 24 on its side and bottom. The interface setting area 24 is provided with a water inlet and a wastewater discharge interface, which are respectively connected to the water outlet and return interface of the water purification unit 1.

[0057] Referring to Figure 1(a), in this embodiment, the second interface area 13 of the water purification unit 1 and the interface setting area 24 of the drinking water unit 2 are both located on the side of the body. In the assembly of the water purification unit and the drinking water unit as a single unit, the second interface area 13 and the interface setting area 24 are positioned to match, and the interface connection can be achieved through a short pipe. The water purification unit and the drinking water unit form a spliced ​​assembly with a narrow gap, resulting in a high degree of integrity in appearance. The above description is only a preferred embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural transformations made under the inventive concept of this utility model using the content of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A water system for a water purifier, characterized in that, include: An independently configured water purification unit is used to produce pure water. The water purification unit is provided with two interface areas. The first interface area is provided with a raw water interface and a wastewater interface for raw water input and wastewater discharge. The second interface area is provided with a water outlet interface for outputting pure water. An independently set drinking water unit is used to process pure water and output water at different temperatures. The drinking water unit is provided with an interface setting area, which is provided with a water inlet interface. An independently designed external pure water tank is used to store pure water; The water purification unit, drinking water unit, and external pure water tank are selectively used according to actual combination requirements and can form any of the following combination configurations: (a) The water purification unit and the drinking water unit are assembled side by side as one unit, and the water purification unit is connected to the water inlet of the drinking water unit through the water outlet of the second interface area; (b) A connecting pipeline is installed between the water purification unit and the drinking water unit for separate installation. The water outlet of the second interface area of ​​the water purification unit is connected to the water inlet of the interface setting area of ​​the drinking water unit through the connecting pipeline. (c) The external pure water tank and the drinking water unit are assembled as one unit, and the outlet of the external pure water tank is connected to the inlet of the drinking water unit interface setting area.

2. The water system for a water purifier according to claim 1, characterized in that: The water purification unit includes multiple filter cartridges connected in sequence. The water purification unit is also equipped with a distribution valve. The first inlet of the distribution valve is connected to the pre-stage filter cartridge via an inlet solenoid valve. The first outlet of the distribution valve is connected to the post-stage filter cartridge. The post-stage filter cartridge has at least one filter cartridge. The outlet of the post-stage filter cartridge is connected to the second inlet of the distribution valve. The second outlet of the distribution valve is connected to the water outlet. The distribution valve is used to dynamically distribute excess pure water and guide the excess pure water back to the front end of the inlet of the post-stage filter cartridge.

3. A water purifier system according to claim 1 or 2, characterized in that: The water purification unit is equipped with a backwash water circuit, which includes a backwash solenoid valve, a backwash water tank, a diaphragm pump A, and a one-way valve B connected in sequence. The flushing solenoid valve is located between the pure water outlet of the RO filter element and the flushing water tank. The inlet of diaphragm pump A is connected to the outlet of the flushing water tank, and the outlet of diaphragm pump A is connected to the pipeline between the outlet of the booster pump and the inlet of the RO filter element via check valve B.

4. The water system for a water purifier according to claim 3, characterized in that: The flushing water tank is equipped only with a high liquid level sensor, and the flushing water tank is emptied when the flushing ends by controlling the running time of the diaphragm pump A.

5. A water purifier system according to claim 1 or 2, characterized in that: The drinking water unit includes a heating water circuit, a cooling water circuit, and a room temperature water circuit connected in parallel; wherein the heating water circuit includes a one-way valve C and an instant heating module connected in sequence; the cooling water circuit includes a one-way valve D, a diaphragm pump B, and a cooling tank connected in sequence; the room temperature water circuit includes a one-way valve E and a zero-pressure valve connected in sequence; a negative pressure valve is provided upstream of the parallel water circuits of the heating water circuit and the cooling water circuit, and the inlet of the negative pressure valve is connected to the water inlet of the drinking water unit.

6. The water system for a water purifier according to claim 5, characterized in that: In the combination configuration of the drinking water unit and the water purification unit, the negative pressure valve is connected to the second outlet of the distribution valve. The negative pressure valve adjusts the flow rate of pure water flowing into the heating water circuit or the cooling water circuit based on the flow requirements of the heating water circuit or the cooling water circuit. Excess pure water flows back to the front end of the RO filter element through the distribution valve.

7. The water system for a water purifier according to claim 5, characterized in that: The drinking water unit is equipped with a three-way valve at its inlet end. The first end of the three-way valve is connected to the inlet interface of the interface setting area. The interface setting area is also equipped with a wastewater discharge interface. The second end of the three-way valve is connected to the wastewater discharge interface, and the third end of the three-way valve is connected to the internal water circuit of the drinking water unit.

8. The water system of a water purifier according to claim 7, characterized in that: The second interface area of ​​the water purification unit is provided with a return water interface. In the combination configuration of the drinking water unit and the water purification unit, the wastewater discharge interface is connected to the return water interface of the second interface area. Wastewater is discharged through the wastewater interface of the first interface area via the return water pipe. A return water solenoid valve and a one-way valve F are sequentially installed on the return water pipe.

9. A water purifier system according to claim 2, characterized in that: A raw water TDS sensor is installed between the pre-filter and the inlet solenoid valve, and a high-pressure switch and a pure water TDS sensor are installed between the one-way valve A and the post-filter. A wastewater solenoid valve is installed at the wastewater outlet of the RO filter to control the discharge of wastewater through the wastewater interface of the water purification unit.

10. A water purifier system according to claim 2, characterized in that: An interface for installing a pure water faucet is reserved on the pipeline between the post-filter and the distribution valve. This pure water faucet interface is located in the first interface area of ​​the water purification unit. Users can choose to install a pure water faucet and supply pure water directly to the external pure water tank through this faucet.

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