Water purification system

Abstract

The utility model discloses a water purification system relates to water treatment technical field, the water purification system includes: the filter unit for generating clean water, first water storage unit, first water storage unit with the clean water export of filter unit can carry out on-off, the cold water in first water storage unit is output through first output waterway, refrigeration subassembly, refrigeration subassembly is used for the water storage in first water storage unit cooling to cold water, the water purification system has cold water output state, in the cold water output state, first water storage unit with the clean water export of filter unit is in the intercommunication state, and the filter unit is in the filter state, to generate clean water is input to first water storage unit in, thereby make the cold water in first water storage unit be pushed out and output through first output waterway. The present application can solve the problem of high cost and large volume of the existing water purification system capable of supplying cold water.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, and in particular to a water purification system. Background Technology

[0002] In homes, offices, and commercial settings, water purification systems with cold water output capabilities have become an important category in the water purification equipment industry because they can meet users' needs for instant drinking cold water. The core function of this type of system is to cool and store purified water and stably output cold water to designated water outlets. It is particularly suitable for scenarios where cold water needs to be delivered to outlets higher than the storage tank (such as faucets, high-level embedded water points, etc.), and its application scope is constantly expanding. Existing water purification systems with cold water output typically use a "storage tank + cooling component" as the core cooling and storage unit: the storage tank temporarily stores the purified water, while the cooling component works with the storage tank to cool the water to a preset cold water temperature through heat exchange, thus achieving cold water storage. Since the cold water outlet is often higher than the storage tank, existing solutions generally use a water pump to drive the flow, requiring an additional pump to deliver the cold water from the storage tank to the high-level cold water outlet at a controllable flow rate. To ensure a continuous supply of cold water to the storage tank, existing systems require a corresponding level detection device within the tank. When the level detection device detects that the water level has dropped to a preset low level threshold, it triggers the automatic water replenishment mechanism of the water purification system, replenishing the storage tank with purified water to maintain its normal water level. However, in the aforementioned existing solutions, the addition of a water pump and level detection device increases the cost of the water purification system. Furthermore, the presence of the water pump increases the system's volume and necessitates consideration of its installation structure. Therefore, there is an urgent need to propose a technical solution that simplifies the structure and reduces costs to address the current pain points in this technological field. Utility Model Content

[0003] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a water purification system that can solve the problems of high cost and large size of existing water purification systems that can supply cold water.

[0004] The specific technical solution of this utility model embodiment is as follows:

[0005] A water purification system, the water purification system comprising:

[0006] Filtration unit used to generate purified water;

[0007] The first water storage unit is connected to the purified water outlet of the filter unit and can be switched on and off. The cold water in the first water storage unit is output through the first output water path.

[0008] A refrigeration component, used to cool the water stored in the first water storage unit to cold water;

[0009] The water purification system has a cold water output state. In the cold water output state, the first water storage unit and the purified water outlet of the filter unit are in a connected state, and the filter unit is in a filtering state to input the generated purified water into the first water storage unit, so that the cold water in the first water storage unit is pushed out and output through the first output water path.

[0010] Preferably, the first water storage unit has a closed structure.

[0011] Preferably, the refrigeration assembly includes a compressor, a condenser, a throttling device, and an evaporator, wherein the evaporator is disposed within the first water storage unit.

[0012] Preferably, the water purification system includes:

[0013] The first return water path has one end connected to the first water storage unit and the other end connected to the inlet of the filter unit. The first water storage unit, the filter unit, and the first return water path can form a first circulating water path.

[0014] A booster pump is installed in the first circulating water line.

[0015] Preferably, the filtration unit includes at least a fine filtration unit; the booster pump is located upstream of the fine filtration unit; and the other end of the first return water path is connected to the upstream of the booster pump.

[0016] Preferably, the fine filtration unit has a wastewater outlet, which is connected to a functional valve with a wastewater ratio function.

[0017] Preferably, the fine filtration unit includes at least one of the following: a reverse osmosis membrane filtration unit, a nanofiltration membrane filtration unit, and an ultrafiltration membrane filtration unit.

[0018] Preferably, the first return water path can be switched on and off.

[0019] Preferably, the water purification system has a circulation state, in which the first return water path is in a connected state, the first water storage unit and the purified water outlet of the filter unit are in a connected state, and the booster pump is in an on state.

[0020] Preferably, the water purification system includes:

[0021] A second water storage unit with a heating component, the second water storage unit being able to be switched on and off with the purified water outlet of the filter unit;

[0022] In the cycle state, the second water storage unit is disconnected from the purified water outlet of the filter unit.

[0023] Preferably, the water purification system includes:

[0024] A second water storage unit capable of heating water, the second water storage unit being able to be connected to or disconnected from the purified water outlet of the filter unit;

[0025] A first pump device is connected to the second water storage unit to output hot water from the second water storage unit through a second output water path.

[0026] Preferably, in the cold water output state, the second water storage unit and the purified water outlet of the filter unit are disconnected.

[0027] Preferably, the water purification system has a hot water output state, and in the hot water output state, the first pump device is in operation.

[0028] Preferably, the water purification system includes:

[0029] The water inlet path is connected to the inlet of the filter unit, and an inlet valve is provided on the water inlet path;

[0030] In the cold water output state, the inlet valve is in the open state.

[0031] Preferably, the water purification system includes:

[0032] A booster pump, used to pressurize the water flowing through the filter unit;

[0033] When the cold water is being output, the booster pump is in the on state.

[0034] Preferably, the water purification system includes:

[0035] The third output water path is connected to the purified water outlet of the filter unit, and the third output water path can be switched on and off.

[0036] Preferably, a first on / off valve is provided between the first water storage unit and the purified water outlet of the filter unit.

[0037] Preferably, a second on / off valve is provided between the second water storage unit and the purified water outlet of the filter unit.

[0038] Preferably, the filtration unit includes at least a pre-filtration unit, which is disposed upstream of the fine filtration unit;

[0039] The water purification system includes:

[0040] The second return water path has one end connected to the upstream of the inlet of the pre-filter unit and the inlet of the booster pump, and the other end connected to the purified water outlet of the fine filter unit. The booster pump, the pre-filter unit, the fine filter unit, and the second return water path can form a second circulating water path.

[0041] Preferably, a second one-way valve is provided on the second return water line, which can be connected upstream from the purified water outlet of the fine filtration unit to the inlet of the pre-filtration unit and the inlet of the booster pump.

[0042] Preferably, the water purification system is installed inside a cabinet.

[0043] The technical solution of this utility model has the following significant beneficial effects:

[0044] The water purification system in this application cools the water stored in the first water storage unit to cold water using a refrigeration component. When the user needs the system to output cold water, it enters a cold water output state, connecting the first water storage unit to the purified water outlet of the filtration unit. The filtration unit is then activated, and the generated purified water is input into the first water storage unit, thereby expelling the cold water from the first water storage unit and outputting it through the first output water path. Through this method, the water purification system does not require an additional water pump to output the cold water from the first water storage unit through the first output water path. Furthermore, the first water storage unit does not need to be replenished based on its own liquid level; therefore, a liquid level detection device can be omitted from the first water storage unit. Thus, the water purification system in this application, through its optimized structure, can effectively reduce production costs and its own size.

[0045] Specific embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope. Features described and / or shown for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments. Attached Figure Description

[0046] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, under the guidance of this invention, can select various possible shapes and proportions to implement this invention according to specific circumstances.

[0047] Figure 1 This is a schematic diagram of the water purification system in the first embodiment of the present invention;

[0048] Figure 2 This is a schematic diagram of the water purification system in a second embodiment of the present invention;

[0049] Figure 3 This is a schematic diagram of the water purification system in the third embodiment of the present invention;

[0050] Figure 4 This is a schematic diagram of the water purification system in the fourth embodiment of the present invention;

[0051] Figure 5 This is a schematic diagram of the water purification system in the fifth embodiment of this utility model.

[0052] The reference numerals in the above figures are as follows:

[0053] 1. First water storage unit; 2. Refrigeration components; 21. Compressor; 22. Condenser; 23. Throttling device; 24. Evaporator; 3. Filtration unit; 31. Fine filtration unit; 32. Pre-filtration unit; 33. Post-filtration unit; 4. First output water path; 5. First return water path; 6. Booster pump; 7. Functional valve; 8. Second water storage unit; 81. Exhaust pipe; 82. Second output water path; 9. First pump device; 10. Inlet water path; 11. Third output water path; 12. First on / off valve; 13. Second on / off valve; 14. Second return water path; 15. Second check valve; 16. Third on / off valve; 17. First check valve; 18. Third check valve; 19. Fourth on / off valve; 20. Inlet valve; 100. Water output control mechanism. Detailed Implementation

[0054] The details of this utility model can be more clearly understood by referring to the accompanying drawings and the description of specific embodiments. However, the specific embodiments of this utility model described herein are only for explaining the purpose of this utility model and should not be construed as limiting this utility model in any way. Under the teachings of this utility model, those skilled in the art can conceive of any possible modifications based on this utility model, and these should all be considered to fall within the scope of this utility model. It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there may be an intervening element. The terms "mounted," "connected," and "connected" should be interpreted broadly, for example, it can be a mechanical connection or an electrical connection, or it can be a connection within two elements, which can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0056] To address the issues of high cost and large size in existing cold water supply systems, this application proposes a new water purification system. Figure 1 This is a schematic diagram of the water purification system in the first embodiment of the present invention, as shown below. Figure 1 As shown, the water purification system may include: a filter unit 3 for generating purified water; a first water storage unit 1, the purified water outlet of the first water storage unit 1 and the filter unit 3 being connectable and disconnectable, and cold water in the first water storage unit 1 being output through a first output water path 4; a cooling component 2, the cooling component 2 being used to cool the water stored in the first water storage unit 1 to cold water; the water purification system has a cold water output state, in which the purified water outlet of the first water storage unit 1 and the filter unit 3 are connected, the filter unit 3 is in a filtering state, so as to input the generated purified water into the first water storage unit 1, thereby causing the cold water in the first water storage unit 1 to be pushed out and output through the first output water path 4.

[0057] The water purification system in this application cools the water stored in the first water storage unit 1 to cold water using a cooling component 2. When the user needs the system to output cold water, the system enters a cold water output state, connecting the first water storage unit 1 to the purified water outlet of the filter unit 3, activating the filter unit 3 to filter, and inputting the generated purified water into the first water storage unit 1. This allows the cold water in the first water storage unit 1 to be pushed out and output through the first output water path 4. Through this method, the water purification system does not require an additional water pump to output the cold water from the first water storage unit 1 through the first output water path 4. Furthermore, the first water storage unit 1 does not need to be replenished based on its own liquid level; therefore, a liquid level detection device can be omitted from the first water storage unit 1. Thus, the water purification system in this application, through structural optimization, can effectively reduce production costs and its own size.

[0058] To better understand the water purification system in this application, it will be further explained and described below. For example... Figure 1 As shown, the water purification system may include: a filtration unit 3 for generating purified water, a first water storage unit 1, and a cooling component 2. The filtration unit 3 for generating purified water can be any existing filtration unit capable of filtering water to meet user needs, and this application does not limit its specific application. As a feasible option, the filtration unit 3 may include at least a fine filtration unit 31, which is used to finely filter water to generate drinking water that meets the user's needs. For example, the fine filtration unit 31 may include at least one of the following: a reverse osmosis membrane filtration unit 3, a nanofiltration membrane filtration unit 3, an ultrafiltration membrane filtration unit 3, etc. When the user requires pure water, the fine filtration unit 31 may use a reverse osmosis membrane filtration unit 3. In an optional embodiment, to extend the service life of the fine filtration unit 31 and to perform some pre-treatment on the raw water before it passes through the fine filtration unit 31, such as adsorbing residual chlorine, the filtration unit 3 may include at least a pre-filtration unit 32, which is located upstream of the fine filtration unit 31. The specific selection of the pre-filter unit 32 can be determined based on the preset treatment functions. Generally, it includes a coarse filter unit 3 for intercepting substances such as sediment, rust, insect eggs, algae, and pebbles / gravel. Additional filter units 3 with different functions can be added depending on the need for further preset treatment of the raw water. In an optional embodiment, the filter unit 3 may include at least a post-filter unit 33, which is located downstream of the fine filter unit 31. The post-filter unit 33 is mainly used to improve the taste of the effluent.

[0059] As an option, the pre-filter unit 32 and / or the fine filter unit 31 and / or the post-filter unit 33 may adopt a composite filter element structure, thereby reducing the number of filter elements in the water purification system.

[0060] Since the inlet of a water purification system is generally connected to a water source such as tap water, and the water pressure provided by tap water is limited, the water purification rate of filter unit 3 is relatively low. In order to further improve the water purification rate of filter unit 3, Figure 2 This is a schematic diagram of the water purification system in a second embodiment of the present invention, as shown below. Figure 2 As shown, the water purification system may include a booster pump 6, which is used to pressurize the water flowing through the filter unit 3. The booster pump 6 can be located upstream or downstream of the filter unit 3.

[0061] like Figure 2 As shown, the water purification system may include: a water inlet path 10, which is connected to the inlet of the filter unit 3. In order to control the connection between the water purification system and the water source, an inlet valve 20 may be installed on the water inlet path 10.

[0062] The first water storage unit 1 is used to store the purified water output from the filtration unit 3. The first water storage unit 1 and the purified water outlet of the filtration unit 3 can be switched on and off. In an optional embodiment, such as... Figure 1 and Figure 2 As shown, a first on / off valve 12 can be installed between the purified water outlet of the first water storage unit 1 and the purified water outlet of the filter unit 3 to control the flow between them. Furthermore, a third one-way valve 18 is installed between the purified water outlet of the filter unit 3 and the first water storage unit 1, and the third one-way valve 18 connects the purified water outlet of the filter unit 3 to the first water storage unit 1. Cold water in the first water storage unit 1 is output through the first output water path 4. The downstream of the first output water path 4 can be connected to a water output control mechanism 100, such as a faucet.

[0063] The cooling component 2 is used to cool the water stored in the first water storage unit 1 to cold water. The cooling component 2 can take different forms to cool the water stored in the first water storage unit 1, such as a semiconductor cooling chip or a compression cooling module. Figure 1 and Figure 2As shown, when the refrigeration component 2 is a compression refrigeration module, the refrigeration component 2 may include: a compressor 21, a condenser 22, a throttling device 23, and an evaporator 24, with the evaporator 24 disposed within the first water storage unit 1. In this embodiment, the refrigeration component 2 has the advantages of large cooling capacity and fast cooling speed, enabling it to cool the water stored in the first water storage unit 1 to the required temperature in a short time. Especially when the first water storage unit 1 outputs cold water to the user, the added purified water can be cooled to the required cold water temperature in a short time. This ensures that the temperature of the cold water subsequently output by the first water storage unit 1 to the user is closer to the required cold water temperature, avoiding excessive temperature difference that could lead to a higher cold water temperature and a decreased user experience. Furthermore, in this embodiment, since the cold water in the first water storage unit 1 is discharged from the purified water outlet of the filter unit 3, the water volume in the first water storage unit 1 remains basically constant. For example, it can be kept at full water or close to full water. In this way, when the evaporator 24 is installed in the first water storage unit 1, the evaporator 24 can always be basically completely submerged in water. During the use of the purified water system, the evaporator 24 will not be partially exposed outside the purified water. In this way, the heat exchange efficiency between the evaporator 24 and the purified water can be guaranteed. Under the same conditions, the evaporator 24 always has a large and constant surface area for heat exchange with the purified water. Therefore, it is not easy for local icing to occur.

[0064] In one specific implementation, such as Figure 1 and Figure 2 As shown, the evaporator 24 may include a spiral heat exchange tube, the center line of which may be the same as the extension direction of the first water storage unit 1. Furthermore, the spiral heat exchange tube may be disposed close to the inner wall of the first water storage unit 1 to increase the length of the heat exchange tube and thus increase the surface area for heat exchange with the purified water.

[0065] The water purification system can have a cold water output mode. In the cold water output mode, the first water storage unit 1 and the purified water outlet of the filter unit 3 are connected, and the filter unit 3 is in filtration mode to input the generated purified water into the first water storage unit 1, thereby causing the cold water in the first water storage unit 1 to be pushed out and output through the first output water passage 4. In order for the purified water generated by the filter unit 3 to be able to push out the cold water in the first water storage unit 1 and output through the first output water passage 4 when it is input into the first water storage unit 1, the first water storage unit 1 needs to be a closed structure (except for the inlet and outlet) and cannot be connected to the atmosphere.

[0066] As a feasible option, the booster pump 6 can be turned on when the cold water is being output, thereby ensuring the filtration rate of the filter unit 3 on the one hand, and ensuring that the outlet of the filter unit 3 has a high pressure on the other hand, so that the cold water in the first water storage unit 1 can be pushed out under sufficient pressure of the filter unit 3, so as to achieve a stable output of the cold water in the first water storage unit 1; in addition, the cold water in the first water storage unit 1 can also be output to the water output control mechanism 100 at a higher position.

[0067] In one alternative implementation, Figure 3 This is a schematic diagram of the water purification system in a third embodiment of the present invention, as shown below. Figure 3 As shown, the water purification system may include a second water storage unit 8 with a heating component, which can be switched on and off with the purified water outlet of the filter unit 3. A second on / off valve 13 may be provided between the second water storage unit 8 and the purified water outlet of the filter unit 3 to enable the switching of the second water storage unit 8 with the purified water outlet of the filter unit 3. The interior of the second water storage unit 8 may be directly connected to the atmosphere, for example, the second water storage unit 8 may be connected to the atmosphere through an exhaust pipe 81 extending to the water output control mechanism 100. When it is necessary to replenish water to the second water storage unit 8, the second on / off valve 13 may be switched to the open state. Alternatively, when replenishing water to the second water storage unit 8, the purified water outlet of the first water storage unit 1 and the filter unit 3 may be disconnected. The second water storage unit 8 can receive and store the purified water generated by the filter unit 3, and heat the stored purified water through the heating component to reach the hot water temperature set by the user. The downstream of the second output water path 82 may be connected to a water output control mechanism 100 such as a faucet. Hot water in the second water storage unit 8 can be output to the water output control mechanism 100 through the second output water passage 82 for user use. The water output control mechanism 100 corresponding to the second output water passage 82 can be the same as the water output control mechanism 100 corresponding to the first output water passage 4, or they can be two independent mechanisms.

[0068] Since the water output control mechanism 100 corresponding to the second water output channel 82 may be higher than the installation height of the second water storage unit 8, in order to achieve effective hot water output, such as Figure 3 As shown, the water purification system may include: a first pump device 9, which is connected to a second water storage unit 8 to output hot water from the second water storage unit 8 through a second output water passage 82. The first pump device 9 may be directly installed on the second output water passage 82. The water purification system may have a hot water output state. In the hot water output state, the first pump device 9 is in operation to output hot water from the second water storage unit 8 at a controllable flow rate. It may also output hot water to a higher water output control mechanism 100.

[0069] As a feasible option, when the water purification system is in the cold water output state, the clean water outlets of the second water storage unit 8 and the filter unit 3 can be disconnected, thereby preventing the clean water output from the filter unit 3 from entering the second water storage unit 8. At the same time, it is necessary to ensure that the cold water in the first water storage unit 1 can be pushed out under sufficient pressure from the filter unit 3 to achieve a stable output of cold water in the first water storage unit 1.

[0070] In one alternative implementation, such as Figure 2 and Figure 3 As shown, the water purification system may include: a first return water path 5, one end of which is connected to a first water storage unit 1, and the other end of which is connected to the inlet of a filter unit 3. The first water storage unit 1, the filter unit 3, and the first return water path 5 can form a first circulating water path. A booster pump 6 can be installed on the first circulating water path. In order to simultaneously enable the booster pump 6 to apply pressure to the filter unit 3 to increase the filtration rate of the filter unit 3, it is feasible to install the booster pump 6 on the water path between the upstream of the first water storage unit 1 and the inlet water path 10. Furthermore, when the filter unit 3 includes a fine filtration unit 31, in order to reduce damage to the filter unit 3, the booster pump 6 is generally installed upstream of the fine filtration unit 31. Therefore, the other end of the first return water path 5 can be connected to the upstream of the booster pump 6.

[0071] As a feasible option, such as Figure 2 and Figure 3 As shown, the first return water path 5 can be switched on and off. A fourth on / off valve 19 can be installed on the first return water path 5. Furthermore, a first check valve 17 can be installed on the first return water path 5, which connects the first water storage unit 1 to the inlet of the filter unit 3.

[0072] The water purification system can operate in a circulating state. In this state, the first return water path 5 is connected, the purified water outlets of the first water storage unit 1 and the filter unit 3 are connected, and the booster pump 6 is turned on. In a non-circulating state, the first return water path 5 can be disconnected. Because the first water storage unit 1 stores cold water long-term, bacteria can easily grow there over time. Furthermore, since the cold water output in the first water storage unit 1 uses a water-push method, it remains essentially full, unlike the second water storage unit 8 which uses up its stored hot water or replenishes it when the level is low. Therefore, some water in the first water storage unit 1 may remain for extended periods, compromising its freshness and causing a decline in water quality. To address this, the water purification system can enter a circulating state to circulate and filter the water in the first water storage unit 1, ensuring its freshness and improving its quality. In circulation mode, the booster pump 6 is activated, causing the cold water in the first water storage unit 1 to flow back to the filter unit 3 through the first return water path 5 for filtration. The filtered water then flows back to the first water storage unit 1, thus improving the water quality in the first water storage unit 1. For example, the filter unit 3 can remove bacteria that grow in the water stored in the first water storage unit 1. Depending on the type of post-filter 33 specifically installed in the filter unit 3, it can also improve the taste and other functions of the water stored in the first water storage unit 1.

[0073] As a feasible solution, when the fine filtration unit 31 needs to discharge wastewater while filtering the raw water, such as Figure 3 As shown, the fine filtration unit 31 has a wastewater outlet, which is connected to a functional valve 7 with a wastewater ratio function.

[0074] In circulation mode, if the fine filtration unit 31 does not discharge wastewater, the functional valve 7 has an on / off function. During this period, the functional valve 7 is in the off state, and the inlet valve 20 of the inlet water circuit 10 can be in the open or closed state. In circulation mode, if the fine filtration unit 31 discharges wastewater, the inlet valve 20 of the inlet water circuit 10 needs to be in the open state to replenish the raw water.

[0075] When the water purification system includes a second water storage unit 8 with a heating component, it is feasible to disconnect the second water storage unit 8 from the purified water outlet of the filter unit 3 in the circulation state, thereby preventing the cold purified water output from the filter unit 3 from being delivered to the second water storage unit 8.

[0076] In one alternative implementation, Figure 5 This is a schematic diagram of the water purification system in the fifth embodiment of this utility model, as shown below. Figure 5As shown, the water purification system includes a third output water path 11, which is connected to the purified water outlet of the filter unit 3 and can be switched on and off. Alternatively, a third on / off valve 16 can be installed on the third output water path 11. The downstream of the third output water path 11 can be connected to a water output control mechanism 100, such as a faucet. The third output water path 11 can be used to supply users with purified water at room temperature from the purified water outlet of the filter unit 3. The water output control mechanism 100 can be an independent water output control mechanism 100 or a shared water output control mechanism 100 with the first water storage unit 1.

[0077] In one alternative implementation, Figure 4 This is a schematic diagram of the water purification system in the fourth embodiment of the present invention, as shown below. Figure 4 and Figure 5 As shown, the water purification system may include a second return water path 14, one end of which is connected upstream of the inlet of the pre-filter unit 32 and the inlet of the booster pump 6, and the other end of which is connected to the purified water outlet of the fine filter unit 31. The booster pump 6, the pre-filter unit 32, the fine filter unit 31, and the second return water path 14 can form a second circulating water path. Preferably, a second one-way valve 15 is provided on the second return water path 14, which can open from the purified water outlet of the fine filter unit 31 upstream of the inlet of the pre-filter unit 32 and the inlet of the booster pump 6.

[0078] To prevent the TDS of the first cup of purified water from the water purification system from being too high when it is first used after a long period of inactivity (when the water purification system has not been used by filter unit 3), the booster pump 6 can be turned on and the function valve 7 can be turned off. This allows the water in the second circulation water circuit to circulate continuously, and the purified water output from the fine filtration unit 31 flows back to the pre-filtration unit 32, eventually turning all the raw water in the pre-filtration unit 32 into purified water. Then, the next stage begins. In this stage, the inlet valve 20 is opened, and the function valve 7 is turned on, allowing the raw water input from the inlet water circuit 10 to enter the pre-filtration unit 32. The purified water in the pre-filtration unit 32 is then pushed into the fine filtration unit 31. By controlling the opening time of the inlet valve 20, the purified water in the pre-filtration unit 32 can completely replace the raw water or wastewater on the raw water side of the filter membrane in the fine filtration unit 31 with purified water. The raw water or wastewater on the raw water side of the filter membrane is then discharged through the function valve 7. In this way, the raw water side of the filter membrane in the fine filtration unit 31 becomes purified water. Even if the water purification system is not used for a long time, the TDS value of the purified water on the purified water side of the filter membrane will increase very slowly. This ensures that the TDS of the first cup of purified water output by the water purification system will increase less or not at all when it is first used, thus improving the quality of the first cup of purified water.

[0079] The water purification system of this application is particularly suitable for installation where the water output control mechanism 100 is installed at a position higher than the first water storage unit 1 and / or the second water storage unit 8. For example, it is particularly suitable for installation inside a cabinet, while the water output control mechanism 100 is installed on the countertop of the cabinet.

[0080] This application also proposes a control method for a water purification system. This control method can be applied to any of the aforementioned water purification systems, or to other suitable water purification systems. The control method may include the following steps:

[0081] S1: Obtain the user's water usage instructions.

[0082] The water purification system receives the user's water usage command and outputs the corresponding purified water. The system can determine the user's water usage command by means of the activation command of the water output control mechanism 100, commands on the user's operation buttons, or changes in water pressure.

[0083] S2: When the water usage command is to output cold water, the first water storage unit 1 is connected to the clean water outlet of the filter unit 3, and the filter unit 3 generates clean water so that the clean water is input into the first water storage unit 1, and the cold water in the first water storage unit 1 is displaced and output.

[0084] In this step, when the water usage command is to output cold water, the inlet valve 20, booster pump 6, and first on / off valve 12 can be opened, while the second on / off valve 13 and third on / off valve 16 can be closed. The raw water from the water source enters through the inlet valve 20 and passes through the filter unit 3 under the action of the booster pump 6 to form purified water. After that, the purified water is input into the first water storage unit 1, and the cold water in the first water storage unit 1 is displaced and output.

[0085] In one alternative implementation, the control method may include the following steps:

[0086] S3: When the water usage command is to output hot water, control the first pump device 9 to operate so as to output the hot water in the second water storage unit 8.

[0087] In one alternative implementation, the control method may include the following steps:

[0088] S4: When the water usage command is to output ambient temperature purified water, control the third output water circuit 11 to connect, and control the inlet valve 20 to open and the booster pump 6 to start.

[0089] In this step, the third on / off valve 16 can be opened to connect the third output water circuit 11.

[0090] In one alternative implementation, the control method may include the following steps:

[0091] S5: When the preset conditions are met, control the first return water path 5 to connect, the first water storage unit 1 and the purified water outlet of the filter unit 3 to connect, and the booster pump 6 to run, so that the water purification system enters the circulation state.

[0092] In this step, when the preset conditions are met, the first on / off valve 12 and the fourth on / off valve 19 can be opened, and the booster pump 6 can be operated to make the water purification system enter the circulation state.

[0093] In this step, as feasible, the preset conditions may include at least one of the following: every time a preset specific time is reached, every time a first preset time interval is reached, the first water storage unit 1 has been away from the last output of cold water for a second preset time interval, etc.

[0094] All articles and references disclosed herein, including patent applications and publications, are incorporated herein by reference for various purposes. The term “substantially constitutes…” used to describe a combination should include the identified element, component, part, or step, as well as other elements, components, parts, or steps that do not substantially affect the essential novelty of the combination. The use of the terms “comprising” or “including” to describe combinations of elements, components, parts, or steps herein also contemplates embodiments substantially constituted by such elements, components, parts, or steps. The use of the term “may” herein is intended to indicate that any described attribute “may” include is optional. Multiple elements, components, parts, or steps can be provided by a single integrated element, component, part, or step. Alternatively, a single integrated element, component, part, or step can be divided into multiple separate elements, components, parts, or steps. The disclosure of “a” or “an” used to describe an element, component, part, or step does not imply exclusion of other elements, components, parts, or steps.

[0095] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A water purification system, characterized in that, The water purification system includes: Filtration unit used to generate purified water; The first water storage unit is connected to the purified water outlet of the filter unit and can be switched on and off. The cold water in the first water storage unit is output through the first output water path. A refrigeration component, used to cool the water stored in the first water storage unit to cold water; The water purification system has a cold water output state. In the cold water output state, the first water storage unit and the purified water outlet of the filter unit are in a connected state, and the filter unit is in a filtering state to input the generated purified water into the first water storage unit, so that the cold water in the first water storage unit is pushed out and output through the first output water path.

2. The water purification system according to claim 1, characterized in that, The first water storage unit has a closed structure.

3. The water purification system according to claim 1, characterized in that, The refrigeration components include a compressor, a condenser, a throttling device, and an evaporator, with the evaporator disposed within the first water storage unit.

4. The water purification system according to claim 1, characterized in that, The water purification system includes: The first return water path has one end connected to the first water storage unit and the other end connected to the inlet of the filter unit. The first water storage unit, the filter unit, and the first return water path can form a first circulating water path. A booster pump is installed in the first circulating water line.

5. The water purification system according to claim 4, characterized in that, The filtration unit includes at least a fine filtration unit; the booster pump is located upstream of the fine filtration unit; the other end of the first return water path is connected to the upstream of the booster pump.

6. The water purification system according to claim 5, characterized in that, The fine filtration unit has a wastewater outlet, which is connected to a functional valve with a wastewater ratio function.

7. The water purification system according to claim 6, characterized in that, The fine filtration unit includes at least one of the following: a reverse osmosis membrane filtration unit, a nanofiltration membrane filtration unit, or an ultrafiltration membrane filtration unit.

8. The water purification system according to claim 4, characterized in that, The first return water path can be switched on and off.

9. The water purification system according to claim 8, characterized in that, The water purification system has a circulation state. In the circulation state, the first return water path is in a connected state, the first water storage unit and the purified water outlet of the filter unit are in a connected state, and the booster pump is in a turned-on state.

10. The water purification system according to claim 9, characterized in that, The water purification system includes: A second water storage unit with a heating component, the second water storage unit being able to be switched on and off with the purified water outlet of the filter unit; In the cycle state, the second water storage unit is disconnected from the purified water outlet of the filter unit.

11. The water purification system according to claim 1, characterized in that, The water purification system includes: A second water storage unit capable of heating water, the second water storage unit being able to be connected to or disconnected from the purified water outlet of the filter unit; A first pump device is connected to the second water storage unit to output hot water from the second water storage unit through a second output water path.

12. The water purification system according to claim 11, characterized in that, In the cold water output state, the second water storage unit is disconnected from the purified water outlet of the filter unit.

13. The water purification system according to claim 11, characterized in that, The water purification system has a hot water output state, and in the hot water output state, the first pump device is in operation.

14. The water purification system according to claim 1, characterized in that, The water purification system includes: The water inlet path is connected to the inlet of the filter unit, and an inlet valve is provided on the water inlet path; In the cold water output state, the inlet valve is in the open state.

15. The water purification system according to claim 1, characterized in that, The water purification system includes: A booster pump, used to pressurize the water flowing through the filter unit; When the cold water is being output, the booster pump is in the on state.

16. The water purification system according to claim 1, characterized in that, The water purification system includes: The third output water path is connected to the purified water outlet of the filter unit, and the third output water path can be switched on and off.

17. The water purification system according to claim 1, characterized in that, A first on / off valve is provided between the first water storage unit and the purified water outlet of the filter unit.

18. The water purification system according to claim 12, characterized in that, A second on / off valve is provided between the second water storage unit and the purified water outlet of the filter unit.

19. The water purification system according to claim 5, characterized in that, The filtration unit includes at least a pre-filtration unit, which is located upstream of the fine filtration unit; The water purification system includes: The second return water path has one end connected to the upstream of the inlet of the pre-filter unit and the inlet of the booster pump, and the other end connected to the purified water outlet of the fine filter unit. The booster pump, the pre-filter unit, the fine filter unit, and the second return water path can form a second circulating water path.

20. The water purification system according to claim 19, characterized in that, A second one-way valve is provided on the second return water line. The second one-way valve can connect the purified water outlet of the fine filtration unit to the inlet of the pre-filtration unit and the inlet of the booster pump upstream.

21. The water purification system according to claim 1, characterized in that, The water purification system is designed to be installed inside the cabinet.

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