Water purifier

Abstract

The utility model provides a water purifier and relates to the technical field of kitchen appliances. The water purifier comprises a filter assembly, a water tank, a sterilization assembly, a backflow passage and a booster pump, a water outlet of the filter assembly is communicated with a water inlet of the water tank, and the sterilization assembly is arranged in the water tank. The backflow channel is communicated with the water tank and the filtering assembly and provided with a first one-way valve, the direction of the first one-way valve is from the water tank to the filtering assembly, the booster pump can pump water in the backflow channel into the filtering assembly, and therefore the water in the water tank can flow back to the filtering assembly to be filtered and sterilized again. When water in the water tank is not used for a certain time, bacteria breeding in the water tank exceeds a certain order of magnitude, the bacteria in the water are difficult to effectively kill by using the sterilization assembly, and a trace amount of COD (Chemical Oxygen Demand) is possibly dissolved out when the water in the water tank is placed for a too long time, at the moment, the water can be input into the filtering assembly again through the backflow channel to be filtered again; therefore, bacteria bred in the water tank can be effectively killed, and impurities in the water can be removed.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, in particular to a water purifier. Background Art

[0002] At present, water purifiers on the market usually filter impurities in tap water through filter cartridges to obtain clean water, but due to the limitations of booster pumps and filter membranes, the flow rate of purified water is generally not very large. The water flow rate of mainstream water purifiers is generally within 2L / min. Such water purifiers are generally equipped with larger filter cartridges and higher-output booster pumps, which on the one hand will cause the water purifier to be larger and thicker, and on the other hand, the higher-output booster pump will bring greater noise and poor user experience.

[0003] In order to provide users with a better water experience and increase the water flow rate of the water purifier, there is a type of volumetric large-flow water purifier on the market. By setting a water tank inside the water purifier, the filtered clean water is stored in the water tank, and then the water is delivered by a large-flow water delivery pump, so as to achieve a large-flow water output of the water purifier. Although the above-mentioned volumetric large-flow water purifier can provide a large-flow water output, it is easy to breed bacteria when the clean water is stored in the water tank for a long time, resulting in excessive bacteria content in the clean water. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a water purifier in order to overcome the defect in the prior art that purified water of the water purifier is easily bred with bacteria when stored in a water tank for a long time.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] The utility model provides a water purifier, which comprises a filter assembly, a water tank, a sterilization assembly, a reflux path and a booster pump, wherein the water outlet of the filter assembly is connected to the water inlet of the water tank, and the sterilization assembly is arranged inside the water tank;

[0007] The reflux passage connects the water tank and the filter assembly. The reflux passage is provided with a first one-way valve. The direction of the first one-way valve is from the water tank to the filter assembly. The booster pump can pump water in the reflux passage into the filter assembly.

[0008] In this solution, the water purifier includes a reflux passage that connects the water tank and the filtration component. A first one-way valve is provided on the reflux passage and it allows water to flow from the water tank to the filtration component. The booster pump can pump the water in the reflux passage into the filtration component, so that the water in the water tank can flow back to the filtration component for re-filtration and disinfection. When the water in the water tank is not used for a certain period of time, the bacteria in the water tank multiply beyond a certain level. It is difficult for the disinfection component to effectively kill the bacteria in the water and meet the standard disinfection rate. Also, there may be a very small amount of COD dissolved out when the water in the water tank is left standing for too long. At this time, the water can be re-input into the filtration component through the reflux passage for re-filtration, so as to effectively kill the bacteria growing in the water tank and remove impurities in the water, making the water quality meet the usage requirements. In other words, with the above structural form, when the water in the water tank is stationary for a short time, the disinfection component can be directly turned on for disinfection. When the water in the water tank is not used for a long time, the water can be refluxed to the water inlet of the filtration component through the reflux passage, so that the filtration component can filter and disinfect the water. Of course, when the user wants to further improve the disinfection effect, the water in the water tank can be disinfected by both the filtration component and the disinfection component at the same time.

[0009] Preferably, the water purifier further includes a waste water passage. One end of the waste water passage is connected to the filtration component, and the other end of the waste water passage is a waste water drain.

[0010] A second one-way valve is provided on the waste water passage, and the direction of the second one-way valve is from the filtration component to the waste water drain.

[0011] In this solution, the water purifier further includes a waste water passage. One end of the waste water passage is connected to the filtration component, the other end of the waste water passage is a waste water drain, and a second one-way valve is provided on the waste water passage to allow the waste water flowing into the filtration component to be discharged. When the water purifier is not used for a long time, there are too many bacteria growing in the water tank and the water is no longer suitable for re-disinfection. At this time, the water in the water tank can flow into the filtration component through the reflux passage and be discharged through the waste water passage, so as to empty the water in the water tank and prevent bacteria from growing in the water tank. At the same time, the refluxed waste water can also wash the filtration component to remove impurities in the filtration component, keep the filtration component clean, and enable the waste water to be reused, avoiding waste of water resources.

[0012] Preferably, the water purifier further includes a water tank drainage passage, and a DC pump is provided on the water tank drainage passage.

[0013] In this solution, when the water purifier is not used for a long time, the water in the water tank breeds too many bacteria and is no longer suitable for re-sterilization. At this time, the water in the water tank can flow into the filtration component through the return passage and then be discharged to the outside through the waste water passage, or the water in the water tank can be directly emptied through the water tank drainage passage to avoid the growth of bacteria in the water tank. The DC pump is used to pump the water in the water tank into the water tank drainage passage.

[0014] Preferably, the water tank drainage passage communicates with the water tank and the waste water passage;

[0015] A third one-way valve is provided on the water tank drainage passage, and the direction of the third one-way valve is from the water tank to the waste water passage.

[0016] In this solution, the water tank drainage passage can communicate with the waste water passage, and a third one-way valve from the water tank to the waste water passage is provided on the water tank drainage passage, so that the water in the water tank can be discharged into the waste water passage through the water tank drainage passage and then discharged to the outside through the waste water passage.

[0017] Preferably, the filtration component includes a pre- and post-composite filter element and a membrane filter element. Along the flow direction of the water, the membrane filter element is arranged downstream of the pre- and post-composite filter element.

[0018] In this solution, the filtration component includes a pre- and post-composite filter element and a membrane filter element. By setting multiple filter elements, the water flowing through the filtration component can be filtered multiple times, resulting in a better filtration effect.

[0019] Preferably, the outlet of the return passage is arranged between the pre- and post-composite filter element and the membrane filter element, and the booster pump is arranged between the outlet of the return passage and the membrane filter element.

[0020] In this solution, the booster pump is used to pump the water in the return passage into the membrane filter element for filtration. By arranging the booster pump between the outlet of the return passage and the membrane filter element, a better pumping effect can be achieved.

[0021] Preferably, the water purifier further includes a large-flow water outlet, the large-flow water outlet communicates with the water outlet of the water tank, and a delivery pump is provided between the large-flow water outlet and the water tank.

[0022] In this solution, the purified water filtered by the filtration component is stored in the water tank. The large-flow water outlet communicates with the water outlet of the water tank and the water is delivered by the delivery pump, so that the water purifier can achieve large-flow water output without setting a larger filter element and a delivery pump with a higher output, thereby reducing the thickness of the water purifier, making the water purifier easier to install, reducing the use noise, and improving the user experience.

[0023] Preferably, the delivery pump is arranged at the lower end of the water tank, and the delivery pump is connected to the water tank through a flexible member.

[0024] In this solution, the flexible component can play a shock-absorbing effect. The transfer pump is arranged at the lower end of the water tank. On the one hand, the vibration conduction of the transfer pump can be reduced by the weight of the water tank. On the other hand, the vibration of the transfer pump can also be conducted to the water in the water tank, enhancing the random movement of the water in the water tank and improving the antibacterial and sterilization effects.

[0025] Preferably, the water purifier further includes a small-flow water outlet, and the small-flow water outlet is directly connected to the water outlet of the filtration component;

[0026] The water flow rate of the small-flow water outlet is less than that of the large-flow water outlet.

[0027] In this solution, in addition to the large-flow water outlet connected to the water tank, the water purifier also has a small-flow water outlet directly connected to the filtration component. The water flow rate of the small-flow water outlet is less than that of the large-flow water outlet, so that the water purifier can discharge water in both large and small flows. Users can choose the water flow size according to actual needs, improving the user experience.

[0028] Preferably, a liquid level sensor is arranged inside the water tank, and the liquid level sensor is used to detect the water level in the water tank.

[0029] In this solution, a liquid level sensor is arranged inside the water tank. The water purifier can adjust the reflux and discharge of the water in the water tank in the reflux path and the wastewater path according to the different water levels detected by the liquid level sensor.

[0030] The positive and progressive effects of the present utility model are as follows:

[0031] The water purifier includes a reflux path, which connects the water tank and the filtration component. A first one-way valve from the water tank to the filtration component is arranged on the reflux path. The booster pump can pump the water in the reflux path into the filtration component, so that the water in the water tank can be refluxed back to the filtration component for re-filtering and sterilization. When the water in the water tank is not used for a certain period of time, the bacteria in the water tank multiply beyond a certain order of magnitude. It is difficult for the sterilization component to effectively kill the bacteria in the water and it is difficult to meet the standard sterilization rate. Moreover, there may be a very small amount of COD dissolution when the water in the water tank is placed for too long. At this time, the water can be re-input into the filtration component through the reflux path for re-filtration, so that the bacteria growing in the water tank can be effectively killed and the impurities in the water can be removed, making the water quality meet the use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the water circuit system of the water purifier according to Embodiment 1 of the present utility model.

[0033] Figure 2 It is a schematic diagram of the water circuit system of the water purifier according to Embodiment 2 of the present utility model.

[0034] Figure 3 Schematic diagram of the water circuit system of a water purifier according to Embodiment 3 of the present utility model.

[0035] Figure 4 Schematic perspective view of the interior of a water purifier according to Embodiment 3 of the present utility model.

[0036] Figure 5 Schematic perspective view of a water tank according to Embodiment 3 of the present utility model.

[0037] Description of reference numerals:

[0038] Filter assembly 100

[0039] Pre and post composite filter element 110

[0040] Membrane filter element 120

[0041] Water tank 200

[0042] Sterilization assembly 210

[0043] Liquid level sensor 220

[0044] Delivery pump 230

[0045] Flexible member 240

[0046] Water tank water inlet 250

[0047] Water tank water outlet 260

[0048] Water tank return drain outlet 270

[0049] Return passage 300

[0050] First one-way valve 310

[0051] Booster pump 320

[0052] Waste water passage 400

[0053] Second one-way valve 410

[0054] Water tank drain passage 500

[0055] Third one-way valve 510

[0056] DC pump 520

[0057] Large flow rate water outlet 610

[0058] Small flow rate water outlet 620 Detailed implementation manners

[0059] The present utility model will be further described below by way of embodiments, but the present utility model is not limited to the following embodiments.

[0060] Embodiment 1

[0061] As Figure 1 shown, this embodiment provides a water purifier, which includes a filtration assembly 100, a water tank 200, a sterilization assembly 210, a return passage 300, and a booster pump 320. The water outlet of the filtration assembly 100 is communicated with the water inlet of the water tank 200, and the sterilization assembly 210 is arranged inside the water tank 200. The return passage 300 communicates the water tank 200 and the filtration assembly 100. The return passage 300 is provided with a first one-way valve 310, and the direction of the first one-way valve 310 is from the water tank 200 to the filtration assembly 100. The booster pump 320 can pump the water in the return passage 300 into the filtration assembly 100.

[0062] The return passage 300 of the water purifier communicates the water tank 200 and the filtration assembly 100, and a first one-way valve 310 from the water tank 200 to the filtration assembly 100 is arranged on the return passage 300. The booster pump 320 can pump the water in the return passage 300 into the filtration assembly 100, so that the water in the water tank 200 can be returned to the filtration assembly 100 for re-filtration and sterilization. When the water in the water tank 200 is not used for a certain period of time, the bacteria in the water tank 200 multiply beyond a certain order of magnitude. It is difficult for the sterilization assembly 210 to effectively kill the bacteria in the water and meet the standard sterilization rate. Moreover, there may be a very small amount of COD dissolution when the water in the water tank 200 is placed for too long. At this time, the water can be re-input into the filtration assembly 100 through the return passage 300 for re-filtration, so as to effectively kill the bacteria growing in the water tank 200 and remove the impurities in the water, making the water quality meet the use requirements. In other words, when the static time of the water in the water tank 200 is short, the sterilization assembly 210 can be directly turned on for sterilization. When the water in the water tank 200 is not used for a long time, the water can be returned to the water inlet of the filtration assembly 100 through the return passage 300, so that the water can be filtered and sterilized by the filtration assembly 100. Of course, when the user wants to further improve the sterilization effect, the water in the water tank 200 can be sterilized by both the filtration assembly 100 and the sterilization assembly 210 at the same time.

[0063] The water purifier further includes a wastewater passage 400. One end of the wastewater passage 400 is connected to the filtration assembly 100, and the other end of the wastewater passage 400 is a wastewater drain outlet. A second one-way valve 410 is provided on the wastewater passage 400, and the direction of the second one-way valve 410 is from the filtration assembly 100 to the wastewater drain outlet, so as to discharge the wastewater flowing into the filtration assembly 100. When the water purifier is not used for a long time, the water in the water tank 200 breeds too many bacteria and is no longer suitable for re-sterilization. At this time, the water in the water tank 200 can flow into the filtration assembly 100 through the return passage 300 and be discharged through the wastewater passage 400, so as to empty the water in the water tank 200 and prevent bacteria from breeding in the water tank 200. At the same time, the refluxed wastewater can also flush the filtration assembly 100 to remove impurities in the filtration assembly 100, keep the filtration assembly 100 clean, and enable the wastewater to be reused, avoiding waste of water resources.

[0064] The filtration assembly 100 includes a pre-and post-composite filter element 110 and a membrane filter element 120. Along the flow direction of the water flow, the membrane filter element 120 is arranged downstream of the pre-and post-composite filter element 110. By arranging multiple filter elements, the water flow sequentially passes through the pre-and post-composite filter element 110 and the membrane filter element 120, so that the water flowing through the filtration assembly 100 can be filtered multiple times, and the filtration effect is better.

[0065] In this embodiment, the filtration assembly 100 includes a pre-and post-composite filter element 110 and a membrane filter element 120. In other embodiments, the pre-filter element, the post-filter element and the membrane filter element 120 can also be separately arranged, or the pre-filter element, the post-filter element and the membrane filter element 120 can be compositely arranged, or other setting methods of the filter elements of the filtration assembly 100 considered suitable by those skilled in the art can be selected.

[0066] In this embodiment, along the flow direction of the water flow, the membrane filter element 120 is arranged downstream of the pre-and post-composite filter element 110. In other embodiments, other flow sequences of the filter elements considered suitable by those skilled in the art can also be selected.

[0067] The water outlet of the return passage 300 is arranged between the pre-and post-composite filter element 110 and the membrane filter element 120, and the booster pump 320 is arranged between the water outlet of the return passage 300 and the membrane filter element 120. The booster pump 320 is used to pump the water in the return passage 300 into the membrane filter element 120 for filtration. By arranging the booster pump 320 between the water outlet of the return passage 300 and the membrane filter element 120, a better suction effect can be achieved.

[0068] In this embodiment, the water outlet of the recirculation passage 300 is provided between the pre-and post-composite filter element 110 and the membrane filter element 120, and the booster pump 320 is provided between the water outlet of the recirculation passage 300 and the membrane filter element 120. In other embodiments, those skilled in the art can select appropriate installation positions for the water outlet of the recirculation passage 300 and the booster pump 320 according to the specific conditions of the filtration assembly 100.

[0069] The water purifier further includes a large-flow water outlet 610. The large-flow water outlet 610 communicates with the water outlet of the water tank 200, and a delivery pump 230 is provided between the large-flow water outlet 610 and the water tank 200. The purified water filtered by the filtration assembly 100 is stored in the water tank 200. The large-flow water outlet 610 communicates with the water outlet of the water tank 200, and water is delivered through the delivery pump 230, so that the water purifier can achieve large-flow water output without setting a relatively large filter element and a delivery pump 230 with a relatively high output. Thereby, the thickness of the water purifier is reduced, making the water purifier easier to install, reducing the operating noise, and enhancing the user experience.

[0070] The delivery pump 230 is provided at the lower end of the water tank 200, and the delivery pump 230 is connected to the water tank 200 through a flexible member 240. The flexible member 240 can play a shock-absorbing effect. The delivery pump 230 is provided at the lower end of the water tank 200. On the one hand, the vibration conduction of the delivery pump 230 can be reduced by the weight of the water tank 200. On the other hand, the vibration of the delivery pump 230 can also be transmitted to the water in the water tank 200, enhancing the random movement of the water in the water tank 200 and improving the antibacterial and sterilization effects.

[0071] A liquid level sensor 220 is provided inside the water tank 200. The liquid level sensor 220 is used to detect the water level in the water tank 200. The water purifier can adjust the reflux and discharge of the water in the water tank 200 through the recirculation passage 300 and the wastewater passage 400 according to different water levels detected by the liquid level sensor 220.

[0072] Embodiment 2

[0073] The structure of this embodiment is basically the same as that of Embodiment 1, and the same structure will not be described in detail. The difference lies in:

[0074] As Figure 2 shown, the water purifier of this embodiment further includes a water tank drainage passage 500, and a DC pump 520 is provided on the water tank drainage passage 500. When the water purifier is not used for a long time, too many bacteria will breed in the water in the water tank 200, making it no longer suitable for re-sterilization. At this time, the water in the water tank 200 can flow into the filtration assembly 100 through the recirculation passage 300 and then be discharged to the outside through the wastewater passage 400, or the water in the water tank 200 can be directly emptied through the water tank drainage passage 500 to avoid bacteria breeding in the water tank 200. The DC pump 520 is used to pump the water in the water tank 200 into the water tank drainage passage 500.

[0075] In this embodiment, the water tank drainage passage 500 connects the water tank 200 and the wastewater passage 400. A third one-way valve 510 is provided on the water tank drainage passage 500, and the direction of the third one-way valve 510 is from the water tank 200 to the wastewater passage 400. Thus, the water in the water tank 200 can be discharged into the wastewater passage 400 through the water tank drainage passage 500 and then discharged to the outside through the wastewater passage 400.

[0076] In other embodiments, the water tank drainage passage 500 may not be connected to the wastewater passage 400. The water tank drainage passage 500 can be directly connected to the water outlet to discharge the wastewater to the outside. Those skilled in the art can select the setting mode of the water tank drainage passage 500 according to the actual situation.

[0077] Embodiment 3

[0078] The structure of this embodiment is basically the same as that of Embodiment 2, and the same structure will not be elaborated. The difference lies in:

[0079] As Figures 3 - 5 shown, the water purifier of this embodiment further includes a small-flow water outlet 620. The small-flow water outlet 620 is directly connected to the water outlet of the filtration assembly 100, and the water flow rate of the small-flow water outlet 620 is less than that of the large-flow water outlet 610. Thus, the water purifier can discharge water both in large flow rate and small flow rate, and users can select the water flow size according to actual needs, further improving the user experience.

[0080] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is the orientation of the device or component in normal use, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation at any time. Therefore, it should not be construed as a limitation of the present invention in this regard.

[0081] Although the specific implementation manners of the present invention have been described above, those skilled in the art should understand that this is only an example. The protection scope of the present invention is defined by the appended claims. Without departing from the principle and essence of the present invention, those skilled in the art can make various changes or modifications to these implementation manners, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A water purifier, characterized in that, The water purifier includes a filtration component, a water tank, a sterilization component, a reflux passage, and a booster pump. The water outlet of the filtration component is connected to the water inlet of the water tank, and the sterilization component is arranged inside the water tank. The reflux passage connects the water tank and the filtration component. A first one-way valve is provided in the reflux passage, and the direction of the first one-way valve is from the water tank to the filtration component. The booster pump can pump the water in the reflux passage into the filtration component.

2. The water purifier according to claim 1, wherein The water purifier further includes a wastewater passage. One end of the wastewater passage is connected to the filtration component, and the other end of the wastewater passage is a wastewater drain outlet. A second one-way valve is provided in the wastewater passage, and the direction of the second one-way valve is from the filtration component to the wastewater drain outlet.

3. The water purifier according to claim 2, characterized in that, The water purifier further includes a water tank drain passage, and a DC pump is provided in the water tank drain passage.

4. The water purifier according to claim 3, characterized in that, The water tank drain passage connects the water tank and the wastewater passage. A third one-way valve is provided in the water tank drain passage, and the direction of the third one-way valve is from the water tank to the wastewater passage.

5. The water purifier according to claim 1, characterized in that, The filtration component includes a pre- and post-composite filter element and a membrane filter element. Along the flow direction of the water, the membrane filter element is arranged downstream of the pre- and post-composite filter element.

6. The water purifier according to claim 5, characterized in that, The water outlet of the reflux passage is arranged between the pre- and post-composite filter element and the membrane filter element, and the booster pump is arranged between the water outlet of the reflux passage and the membrane filter element.

7. The water purifier according to claim 1, characterized in that, The water purifier further includes a large-flow water outlet, which is connected to the water outlet of the water tank, and a delivery pump is provided between the large-flow water outlet and the water tank.

8. The water purifier according to claim 7, wherein The delivery pump is arranged at the lower end of the water tank, and the delivery pump is connected to the water tank through a flexible member.

9. The water purifier according to claim 7, characterized in that, The water purifier further includes a small-flow water outlet, which is directly connected to the water outlet of the filtration component. The water flow rate of the small-flow water outlet is less than the water flow rate of the large-flow water outlet.

10. The water purifier according to claim 1, characterized in that, A liquid level sensor is arranged inside the water tank, and the liquid level sensor is used to detect the water level in the water tank.

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