Self-cleaning water purifier

Abstract

The utility model relates to the field of water purification equipment, in particular to a self-cleaning water purifier, and aims to solve the problem that when an existing water purifier cleans a reverse osmosis membrane filter element, cleaning is not thorough due to too short cleaning time or energy is wasted due to too long cleaning time. The utility model provides a self-cleaning water purifier. The self-cleaning water purifier comprises a reverse osmosis membrane filter element, the cleaning assembly is used for conveying cleaning liquid to the reverse osmosis membrane filter element; the circulating pipeline can enable the cleaning assembly, the water inlet end of the reverse osmosis membrane filter element and the wastewater end of the reverse osmosis membrane filter element to be communicated in sequence to form a cleaning loop; the circulating pump can drive the liquid in the cleaning loop to flow circularly; and the water quality detection component is arranged on the cleaning loop and is used for detecting water quality information in the cleaning loop. The problem that cleaning is not thorough due to the fact that cleaning time is too short and the problem that energy is wasted due to the fact that cleaning time is too long can be avoided, and the use experience of a user is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to water purification equipment field, specifically provide a self-cleaning water purifier. BACKGROUND

[0002] People's daily life in the water purification equipment in the long-term use process, will have the dirt or other impurities in water adhere in the reverse osmosis membrane filter core, influence water purification equipment's water filtering rate, make the service life of reverse osmosis membrane filter core decline. And use the reverse osmosis membrane filter core that adhered to a large number of dirt filters water, and the quality of pure water obtained by filtration will decline. Therefore, the prior art usually uses cleaning agent to clean the reverse osmosis membrane filter core.

[0003] In the prior art, when cleaning the reverse osmosis membrane filter core, a fixed cleaning time is usually set to clean the reverse osmosis membrane filter core. Since the reverse osmosis membrane filter core is used in different water quality areas, when the reverse osmosis membrane filter core is used in areas with poor water quality, there may be a problem of incomplete cleaning due to too short cleaning time, and when the reverse osmosis membrane filter core is used in areas with good water quality, there may be a problem of energy waste due to too long cleaning time, thereby causing poor user experience. SUMMARY

[0004] The utility model aims at solving the above technical problem, that is, solving the problem of incomplete cleaning due to too short cleaning time or energy waste due to too long cleaning time when cleaning the reverse osmosis membrane filter core of the existing water purifier.

[0005] The utility model provides a kind of self-cleaning water purifier, the self-cleaning water purifier includes: reverse osmosis membrane filter core;Cleaning assembly has cleaning agent storage component, the cleaning assembly can be communicated with the water inlet end of the reverse osmosis membrane filter core, to send cleaning liquid to the reverse osmosis membrane filter core;Circulation pipeline, its first end is communicated with the waste water end of the reverse osmosis membrane filter core, its second end is communicated with the cleaning assembly, so that the cleaning assembly, the water inlet end of the reverse osmosis membrane filter core and the waste water end of the reverse osmosis membrane filter core are sequentially communicated to form cleaning circuit;Circulating pump, it is arranged on the cleaning circuit to drive the liquid circulation flow in the cleaning circuit;And water quality detection component, it is arranged on the cleaning circuit and the water quality detection component is used to detect water quality information in the cleaning circuit.

[0006] In the preferred technical scheme of the above self-cleaning water purifier, the water quality detection component includes at least one of a TDS sensor, a pH sensor or a turbidity sensor;And / or the water quality detection component is arranged on the circulation pipeline.

[0007] In the preferred technical scheme of the self-cleaning water purifier, the self-cleaning water purifier further comprises a water inlet main path, the water inlet main path is communicated with a water inlet end of the reverse osmosis membrane filter core, the cleaning assembly has a cleaning pipeline, two ends of the cleaning pipeline form a cleaning inlet and a cleaning outlet respectively, the cleaning inlet is communicated with the water inlet main path, so that the water in the water inlet main path enters the cleaning agent storage member through the cleaning inlet to form a cleaning liquid, and the cleaning outlet is communicated with the water inlet main path, so that the cleaning liquid is delivered into the reverse osmosis membrane filter core through the cleaning outlet.

[0008] In the preferred technical scheme of the self-cleaning water purifier, the cleaning assembly comprises a first cleaning pipe and a first cleaning valve and a first cleaning agent storage member arranged on the first cleaning pipe in sequence, the first cleaning agent storage member is located at a downstream end of the first cleaning valve and is used for storing an acidic cleaning agent or an alkaline cleaning agent, and the circulating pump is arranged on the first cleaning pipe; or the cleaning assembly comprises a converging pipe, at least two cleaning branches arranged in parallel, a second cleaning valve and a second cleaning agent storage member arranged on each cleaning branch, first ends of the cleaning branches converge and form the cleaning inlet, second ends of the cleaning branches converge and are communicated with the converging pipe, an end of the converging pipe forms the cleaning outlet, the second cleaning agent storage member is located at a downstream end of the second cleaning valve, and the second cleaning agent storage member on each cleaning branch is used for storing a different type of cleaning agent, and the circulating pump is arranged on the converging pipe.

[0009] In the preferred technical scheme of the self-cleaning water purifier, the self-cleaning water purifier further comprises a first one-way valve arranged between the cleaning outlet and the circulating pump and capable of resisting water pressure in the water inlet main path; and / or the self-cleaning water purifier further comprises a second one-way valve arranged on the first cleaning pipe and / or the second cleaning pipe and capable of preventing water in the water inlet main path from flowing reversely into the first cleaning agent storage member and / or the second cleaning agent storage member through the cleaning outlet.

[0010] In the preferred technical scheme of the self-cleaning water purifier, the self-cleaning water purifier further comprises a booster pump arranged on the water inlet main path, and the cleaning outlet is located at a downstream end of the booster pump; and / or the self-cleaning water purifier further comprises a water inlet valve arranged on the water inlet main path and used for controlling opening and closing of the water inlet main path, the cleaning inlet is located at an upstream end of the water inlet valve, and the cleaning outlet is located at a downstream end of the water inlet valve; and / or the self-cleaning water purifier further comprises a pre-filter unit, a water outlet end of the pre-filter unit is communicated with the water inlet main path, and the cleaning inlet is located at a downstream end of the pre-filter unit.

[0011] In the preferred technical scheme of the self-cleaning water purifier, the self-cleaning water purifier further comprises a waste water pipe and a waste water valve arranged on the waste water pipe, the waste water pipe is communicated with a waste water end of the reverse osmosis membrane filter core, and a first end of the circulation pipeline is communicated with the waste water pipe.

[0012] In the preferred technical scheme of the self-cleaning water purifier, the self-cleaning water purifier further comprises a waste water pipe and a waste water valve arranged on the waste water pipe, the waste water pipe is communicated with a waste water end of the reverse osmosis membrane filter core, and a first end of the circulation pipeline is communicated with the waste water pipe.

[0013] In the preferred technical scheme of the self-cleaning water purifier, the self-cleaning water purifier further comprises a waste water pipe and a waste water valve arranged on the waste water pipe, the waste water pipe is communicated with a waste water end of the reverse osmosis membrane filter core, and a first end of the circulation pipeline is communicated with the waste water pipe.

[0014] In the preferred technical scheme of the self-cleaning water purifier, the circulation pump is in communication connection with the water quality detection member.

[0015] In the preferred technical scheme, the cleaning assembly delivers the cleaning liquid to the reverse osmosis membrane filter core, and the cleaning liquid circulates in the cleaning loop formed by the cleaning assembly, the water inlet end and the waste water end of the reverse osmosis membrane filter core, so that the cleaning liquid flushes the reverse osmosis membrane filter core to clean the reverse osmosis membrane filter core, and the flushing of the reverse osmosis membrane filter core is more thorough. Compared with the form that the cleaning liquid circulates in the cleaning loop by the booster pump, the form that the liquid in the cleaning loop circulates by the circulation pump can avoid the corrosion of the diaphragm in the booster pump by the cleaning liquid, and prolong the service life of the booster pump. By arranging the water quality detection member, the water quality information in the cleaning loop can be detected, and whether the reverse osmosis membrane filter core has been cleaned can be judged according to the water quality information detected by the water quality detection member, so that the problem of incomplete cleaning caused by too short cleaning time and the problem of energy waste caused by too long cleaning time can be avoided, and the user's experience is greatly improved.

[0016] Further, by arranging the circulation pump on the circulation pipeline, when the self-cleaning water purifier is in the normal water production mode, the problem of water leakage of the circulation pump caused by too high water pressure in the water inlet main line can be avoided, and the user's experience is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] The preferred embodiments of the utility model will be described below in combination with the drawings, in which:

[0018] Figure 1 is a connection diagram of the self-cleaning water purifier provided by the embodiment one of the present application;

[0019] Figure 2 is a connection diagram of the self-cleaning water purifier provided by the embodiment two of the present application;

[0020] Figure 3 is a connection diagram of the self-cleaning water purifier provided by the embodiment three of the present application;

[0021] Figure 4 is a connection diagram of the self-cleaning water purifier provided by the embodiment four of the present application.

[0022] List of reference signs:

[0023] 10, reverse osmosis membrane filter core; 21, first cleaning agent storage member; 22, first cleaning pipe; 23, first cleaning valve; 24, confluence pipe; 25, second cleaning valve; 26, second cleaning agent storage member; 27, first one-way valve; 28, second one-way valve; 31, circulating pipeline; 32, circulating pump; 40, water quality detection member; 50, water inlet main road; 61, booster pump; 62, water inlet valve; 63, pre-filter unit; 64, pure water outlet pipe; 65, pure water water member; 71, waste water pipe; 72, waste water valve; 81, drain pipe; 82, drain valve; 83, backflow pipe; 84, backflow valve. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application.

[0025] It should be noted that in the description of the present application, the terms "upper", "lower", "inner", "outer" and the like indicate the direction or positional relationship of the terms based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0026] In addition, it should also be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] As Figure 1 and Figure 2 The utility model provides a kind of self-cleaning water purifier, including reverse osmosis membrane filter element 10, cleaning assembly, circulation pipeline 31, circulating pump 32 and water quality detection component 40.Cleaning assembly has cleaning agent storage component, and cleaning assembly can be communicated with the water inlet end of reverse osmosis membrane filter element 10, to send cleaning liquid to reverse osmosis membrane filter element 10;The first end of circulation pipeline 31 is communicated with the wastewater end of reverse osmosis membrane filter element 10, and its second end is communicated with cleaning assembly, so that cleaning assembly, the water inlet end of reverse osmosis membrane filter element 10 and the wastewater end of reverse osmosis membrane filter element 10 are sequentially communicated to form cleaning circuit;Circulating pump 32 is arranged on cleaning circuit to drive the circulation of liquid in cleaning circuit;Water quality detection component 40 is arranged on cleaning circuit and water quality detection component 40 is used to detect water quality information in cleaning circuit.

[0028] By such setting, cleaning assembly can send cleaning liquid to reverse osmosis membrane filter element 10, under the action of circulating pump 32, so that cleaning liquid can circulate in the cleaning circuit formed by cleaning assembly, the water inlet end and wastewater end of reverse osmosis membrane filter element 10, and cleaning assembly makes cleaning liquid flush reverse osmosis membrane filter element 10, so that reverse osmosis membrane filter element 10 is washed more thoroughly;Water quality detection component 40 can detect water quality information in cleaning circuit, and whether reverse osmosis membrane filter element 10 has been washed is judged according to the water quality information detected by water quality detection component 40, on the one hand, it can avoid the problem that cleaning is not thorough due to too short cleaning time, on the other hand, it can also avoid the problem of energy waste due to too long cleaning time.

[0029] It is conceivable that circulating pump 32 is arranged on cleaning circuit to make liquid circulate, instead of using existing booster pump in pipeline to circulate, which avoids that cleaning agent corrodes booster pump.In actual production, the cost of circulating pump 32 is lower than that of booster pump, and cost is saved.

[0030] Preferably, water quality detection component 40 includes at least one of TDS sensor, PH value sensor or turbidity sensor.

[0031] In one specific embodiment, water quality detection component 40 can be TDS sensor, and correspondingly, water quality information in cleaning pipeline is TDS value in cleaning pipeline, TDS sensor is a kind of sensor for measuring water quality, and water quality is determined according to the content of total solids (TDS) dissolved in water, and whether reverse osmosis membrane filter element 10 has been cleaned is judged by detecting whether water quality continues to change through TDS sensor under the condition that cleaning agent is sufficient.

[0032] In another possible embodiment, the water quality detection member 40 can also be a PH value sensor, and accordingly, the water quality information in the cleaning pipeline is the PH value in the cleaning pipeline. The PH value sensor is used to detect whether the PH value in the cleaning circuit changes. Since the cleaning agent is an acidic cleaning agent or an alkaline cleaning agent, the acidic cleaning agent or the alkaline cleaning agent can dissolve the dirt attached to the reverse osmosis membrane filter element 10. When the PH value in the cleaning circuit does not change, it indicates that the cleaning agent is no longer consumed, and the cleaning of the reverse osmosis membrane filter element 10 is completed.

[0033] In another possible embodiment, the water quality detection member 40 can also be a turbidity sensor, and accordingly, the water quality information in the cleaning pipeline is the turbidity value in the cleaning pipeline. The turbidity sensor is used to detect the turbidity in the cleaning circuit. When the turbidity in the cleaning circuit no longer rises, it indicates that the dirt in the reverse osmosis membrane filter element 10 no longer enters the cleaning circuit, and it is determined that the reverse osmosis membrane filter element 10 has been cleaned.

[0034] It should be noted that in the embodiments of the present application, other sensors capable of determining whether new impurities are dissolved in the cleaning liquid can also be used, and the present application is not limited to the three specific sensors listed.

[0035] It should be further noted that in actual applications, the present application does not limit the specific setting position of the water quality detection member 40 on the cleaning circuit, as long as the water quality information in the cleaning circuit can be detected. For example, the water quality detection member 40 can be arranged on the circulating pipeline 31, or the water quality detection member 40 can be arranged on the cleaning pipeline, or the water quality detection member 40 can be arranged on the wastewater pipe 71, etc. The adjustment and change of the specific setting position of the water quality detection member 40 on the cleaning circuit do not deviate from the principles and scope of the present application, and should be included in the protection scope of the present application.

[0036] Preferably, as shown in FIG. 1, the water quality detection member 40 is arranged on the circulating pipeline 31. Figures 1 to 4

[0037] ​It should be noted that in actual application, the specific setting type of the cleaning assembly is not limited, for example, the cleaning assembly can be set to have only a cleaning outlet, that is, a large amount of cleaning liquid is directly stored in the cleaning agent storage member, when the reverse osmosis membrane filter core 10 needs to be cleaned, the cleaning agent stored in the cleaning agent storage member flows out from the cleaning outlet and is delivered into the reverse osmosis membrane filter core 10, or the cleaning assembly can also be set to include a cleaning pipeline and a cleaning agent storage member arranged on the cleaning pipeline, two ends of the cleaning pipeline form a cleaning inlet and a cleaning outlet respectively, water is injected into the cleaning inlet so as to form cleaning liquid in the cleaning agent storage member, and the like, the adjustment and change of the specific setting type of the cleaning assembly do not deviate from the principles and scope of the present application, and should be included in the protection scope of the present application.

[0038] It should be further noted that the specific setting position of the circulating pump 32 on the cleaning circuit is not limited, for example, the circulating pump 32 can be arranged on the circulating pipeline 31, or the circulating pump 32 can also be arranged at any other possible position on the cleaning circuit, and the like, the adjustment and change of the specific setting position of the circulating pump 32 on the cleaning circuit do not deviate from the principles and scope of the present application, and should be included in the protection scope of the present application.

[0039] Preferably, as shown in Figure 1 and Figure 2 The self-cleaning water purifier further includes a water inlet main path 50, the water inlet main path 50 is in communication with the water inlet end of the reverse osmosis membrane filter core 10, the cleaning assembly has a cleaning pipeline, two ends of the cleaning pipeline form a cleaning inlet and a cleaning outlet respectively, the cleaning inlet is in communication with the water inlet main path 50, so that the water in the water inlet main path 50 enters the cleaning agent storage member through the cleaning inlet to form cleaning liquid, the cleaning outlet is in communication with the water inlet main path 50, so that the cleaning liquid is delivered into the reverse osmosis membrane filter core 10 through the cleaning outlet, and the second end of the circulating pipeline 31 is in communication with the cleaning pipeline.

[0040] It should be noted that the cleaning assembly is not limited to having a cleaning inlet and a cleaning outlet, for example, the cleaning assembly can also be set to have only a cleaning outlet, a large amount of cleaning agent is stored in the cleaning agent storage member, when the reverse osmosis membrane filter core 10 is cleaned, the cleaning agent is output through the cleaning outlet, and the like, the adjustment and change of the specific setting type of the cleaning agent storage member do not deviate from the principles and scope of the present application, and should be included in the protection scope of the present application.

[0041] Of course, preferably, the cleaning assembly is provided with the cleaning inlet and the cleaning outlet, so that the water in the water inlet main path 50 can enter the cleaning path through the cleaning inlet, and the cleaning agent stored in the cleaning agent storage member is dissolved to form the cleaning liquid, the cleaning liquid enters the water inlet main path 50 through the cleaning outlet and is then delivered to the water inlet end of the reverse osmosis membrane filter element 10, so as to flush the reverse osmosis membrane filter element 10.

[0042] It should be noted that, compared with the form of providing the cleaning assembly with only the cleaning outlet, the form of providing the cleaning assembly with the cleaning inlet and the cleaning outlet can enable the cleaning assembly to form the cleaning liquid by injecting water into the cleaning inlet during cleaning, avoid storing a large amount of cleaning liquid in the cleaning agent storage member to cause the cleaning assembly to be too large in size, and further improve the user experience.

[0043] It should be noted that, in actual application, the cleaning outlet is not limited to being communicated with the water inlet main path 50, and the cleaning assembly delivers the cleaning liquid to the reverse osmosis membrane filter element 10 through the water inlet main path 50, for example, the reverse osmosis membrane filter element 10 can be provided with two water inlet ends, and the two water inlet ends are respectively communicated with the water inlet main path 50 and the cleaning path, and the like, and such flexible adjustment and change do not deviate from the principles and scope of the present application, and should be included in the protection scope of the present application. Of course, preferably, the cleaning outlet is communicated with the water inlet main path 50, and the cleaning assembly delivers the cleaning liquid to the reverse osmosis membrane filter element 10 through the water inlet main path 50.

[0044] The cleaning assembly of the present application will be described below in combination with the following two embodiments.

[0045] Embodiment one:

[0046] As shown in Figure 1 The cleaning assembly includes a first cleaning pipe 22, a first cleaning valve 23 and a first cleaning agent storage member 21 arranged on the first cleaning pipe 22 in sequence, the first cleaning agent storage member 21 is located at the downstream end of the first cleaning valve 23 and is used for storing an acidic cleaning agent or an alkaline cleaning agent, and a circulating pump 32 is arranged on the first cleaning pipe 22.

[0047] It can be understood that the first cleaning valve 23 is used for controlling the opening and closing of the first cleaning pipe 22, when the self-cleaning water purifier is in the normal water production mode, the first cleaning valve 23 cuts off the first cleaning pipe 22, when the self-cleaning water purifier cleans the reverse osmosis membrane filter element 10, the first cleaning valve 23 is opened, the water in the water inlet main path 50 flows through the first cleaning pipe 22 and enters the first cleaning agent storage member 21, the cleaning agent in the first cleaning agent storage member 21 is dissolved to form the cleaning liquid, and then the cleaning liquid flows out of the first cleaning pipe 22 and flows into the reverse osmosis membrane filter element 10.

[0048] It should be noted that in the embodiments of the present application, the cleaning agent can be solid or liquid, and the cleaning agent can be acidic or alkaline, and the appropriate cleaning agent can be selected according to the specific situation of the dirt on the reverse osmosis membrane filter element 10.

[0049] Embodiment two:

[0050] As shown in Figure 2 The cleaning assembly includes a manifold 24, at least two parallelly arranged cleaning branches, a second cleaning valve 25 and a second cleaning agent storage member 26 arranged on each cleaning branch, the first ends of the plurality of cleaning branches converge and form a cleaning inlet, the second ends of the plurality of cleaning branches converge and communicate with the manifold 24, the end of the manifold 24 forms a cleaning outlet, and the second cleaning agent storage member 26 is located at the downstream end of the second cleaning valve 25. The second cleaning agent storage member 26 on each cleaning branch is used to store different types of cleaning agents, and a circulating pump 32 is arranged on the manifold 24.

[0051] Through such an arrangement, the second cleaning agent storage member 26 of each cleaning branch stores the cleaning agent, and those skilled in the art can select the appropriate cleaning agent according to the type of dirt on the reverse osmosis membrane filter element 10 and selectively open the second cleaning valve 25 on the cleaning branch. The second ends of the plurality of cleaning branches communicate with the manifold 24, so that the cleaning liquid in the cleaning branch enters the reverse osmosis membrane filter element 10 after entering the cleaning outlet along the manifold 24, so as to clean the reverse osmosis membrane filter element 10.

[0052] It should be noted that in actual application, the present application does not limit the specific number of parallelly arranged cleaning branches, for example, two parallelly arranged cleaning branches can be arranged, the second cleaning valve 25 and the second cleaning agent storage member 26 are arranged on the two cleaning branches, or three parallelly arranged cleaning branches can be arranged, the second cleaning valve 25 and the second cleaning agent storage member 26 are arranged on the three cleaning branches, or a plurality of parallelly arranged cleaning branches can be arranged, the second cleaning valve 25 and the second cleaning agent storage member 26 are arranged on the plurality of cleaning branches, and so on. Such adjustment and change of the specific number of parallelly arranged cleaning branches does not deviate from the principles and scope of the present application, and should be included in the protection scope of the present application.

[0053] Exemplarily, the cleaning assembly includes two parallelly arranged cleaning branches, and the second cleaning agent storage member 26 on the two cleaning branches respectively stores acidic cleaning agent and alkaline cleaning agent.

[0054] It should be noted that the circulation pump 32 is not limited to be arranged on the first cleaning pipe 22 or the collecting pipe 24, for example, the circulation pump 32 can also be arranged on the circulation pipeline 31, and the like, and the adjustment and change of the specific arrangement position of the circulation pump 32 on the cleaning circuit do not deviate from the principles and scope of the present application, and should be included in the protection scope of the present application. Of course, preferably, the circulation pump 32 is arranged on the first cleaning pipe 22 or the collecting pipe 24.

[0055] Preferably, the self-cleaning water purifier of the present application further comprises a first check valve 27 arranged between the cleaning outlet and the circulation pump 32 and capable of resisting the water pressure in the water inlet main line 50.

[0056] Since the self-cleaning water purifier is in the normal water production mode, the water pressure in the water inlet main line 50 is relatively high, and in order to reduce the cost and increase the efficiency, the circulation pump 32 is arranged as a low-cost water pump that is not resistant to high pressure, and by arranging the first check valve 27, the water pressure in the water inlet main line 50 can be effectively resisted, and the problem of water leakage of the circulation pump 32 caused by excessively high water pressure can be avoided.

[0057] Preferably, the self-cleaning water purifier of the present application further comprises a second check valve 28 arranged at the downstream end of the first cleaning agent storage member 21 and / or the second cleaning agent storage member 26 and used to prevent the water in the water inlet main line 50 from flowing backward to the first cleaning agent storage member 21 and / or the second cleaning agent storage member 26 through the cleaning outlet.

[0058] It should be noted that the first cleaning agent storage member 21 and / or the second cleaning agent storage member 26 is not limited to being arranged to have a check structure to prevent the water in the water inlet main line 50 from flowing backward to the first cleaning agent storage member 21 and / or the second cleaning agent storage member 26 through the cleaning outlet, for example, the first cleaning agent storage member 21 and / or the second cleaning agent storage member 26 can also be arranged to have a check structure to prevent the water in the water inlet main line 50 from flowing backward to the first cleaning agent storage member 21 and / or the second cleaning agent storage member 26 through the cleaning outlet, and the like, and such flexible adjustment and change do not deviate from the principles and scope of the present application, and should be included in the protection scope of the present application.

[0059] It should be further noted that in actual application, the present application does not make any limitation on the specific arrangement number of the check valve 27, for example, one second check valve 28 can be arranged on each cleaning branch, or one check valve can be arranged on one cleaning branch, and one second check valve 28 can be arranged on the collecting pipe 24, and the like, and such flexible adjustment and change do not deviate from the principles and scope of the present application, and should be included in the protection scope of the present application.

[0060] Preferably, one second check valve 28 is arranged on each cleaning branch.

[0061] It also needs to be explained that when the reverse osmosis membrane filter element 10 is cleaned, the reverse osmosis membrane filter element 10 can be cleaned with an acidic cleaning agent first, and then cleaned with an alkaline cleaning agent, or the reverse osmosis membrane filter element 10 can be cleaned with an alkaline cleaning agent first, and then cleaned with an acidic cleaning agent, and the like. Such flexible adjustment and change does not deviate from the principles and scope of the present application, and should be included in the protection scope of the present application.

[0062] It also needs to be explained that the present application does not make any limitation on the specific type of acidic cleaning agent, for example, the acidic cleaning agent can be set to at least one of malic acid, citric acid, hydrochloric acid, and phosphoric acid. Of course, the acidic cleaning agent can also be other types of acidic solution, which can be adjusted by those skilled in the art according to actual needs.

[0063] Preferably, the acidic cleaning agent is malic acid or citric acid, which has good disinfection and bacteriostasis effect while cleaning dirt, and can disinfect and bacteriostasis the reverse osmosis membrane filter element 10.

[0064] It needs to be explained that the present application does not make any limitation on the specific type of alkaline cleaning agent, for example, the alkaline cleaning agent can be set to at least one of dishwashing powder, soda, baking soda, sodium hydroxide, potassium hydroxide, calcium hydroxide, calcium oxide, sodium citrate, ethylenediaminetetraacetic acid tetrasodium, sodium dodecyl sulfate, sodium disulfite, and sodium bisulfite. Of course, the alkaline cleaning agent can also be other types of alkaline solution, which can be adjusted by those skilled in the art according to actual needs.

[0065] Preferably, as shown in Figure 1 and Figure 2 The self-cleaning water purifier further comprises a booster pump 61, which is arranged on the water inlet main path 50, and the cleaning outlet is located at the downstream end of the booster pump 61.

[0066] It can be understood that the booster pump 61 is arranged on the water inlet main path 50 to boost the water in the water inlet main path 50, so that the water enters the reverse osmosis membrane filter element 10 for filtration under the action of pressure. By arranging the cleaning outlet at the downstream end of the booster pump 61, the cleaning liquid in the cleaning circuit can not pass through the booster pump 61, avoiding the corrosion of the diaphragm in the booster pump 61 by the cleaning agent, affecting the service life of the booster pump 61.

[0067] Preferably, as shown in Figure 1 and Figure 2As shown in the embodiment of the utility model, the self-cleaning water purifier further comprises a water inlet valve 62, the water inlet valve 62 is arranged on the water inlet main path 50 and is used for controlling the on-off of the water inlet main path 50, the cleaning inlet is located at the upstream end of the water inlet valve 62, and the cleaning outlet is located at the downstream end of the water inlet valve 62.

[0068] By adopting the scheme, under the condition that the self-cleaning water purifier is in the normal water production mode, the water inlet valve 62 is opened, so that water can flow from the water inlet main path 50 into the reverse osmosis membrane filter core 10 for filtration, under the condition that the cleaning assembly cleans the reverse osmosis membrane filter core 10, the water inlet valve 62 is closed, and the water in the water inlet main path 50 flows into the cleaning pipeline to dissolve the cleaning agent in the cleaning agent storage member, forming cleaning liquid, and under the action of the circulating pump 32, the cleaning liquid circulates in the cleaning loop, and the reverse osmosis membrane filter core 10 is cleaned.

[0069] As shown in FIGS. 1 and Figure 2 As shown in the specific embodiment of the utility model, the self-cleaning water purifier further comprises a pre-filtering unit 63, the water outlet end of the pre-filtering unit 63 is communicated with the water inlet main path 50, and the cleaning inlet is located at the downstream end of the pre-filtering unit 63.

[0070] By arranging the pre-filtering unit 63, water can be preliminarily filtered, the water filtered by the pre-filtering unit 63 enters the reverse osmosis membrane filter core 10 through the water inlet main path 50 for filtration, the service life of the reverse osmosis membrane filter core 10 is prolonged, and meanwhile, the cleaning inlet is arranged at the downstream end of the pre-filtering unit 63, the cleaning agent can be dissolved by using the water preliminarily filtered by the pre-filtering unit 63, and the reverse osmosis membrane filter core 10 is cleaned, so that the cleaning effect is better.

[0071] It should be noted that in actual application, the cleaning inlet can also be arranged at the upstream end of the pre-filtering unit 63, and the adjustment and change of the specific arrangement position of the cleaning inlet and the pre-filtering unit 63 do not deviate from the principle and range of the utility model, and should be included in the protection range of the utility model.

[0072] It should be noted that in actual application, the first end of the circulating pipeline 31 can be directly arranged in communication with the waste water end of the reverse osmosis membrane filter core 10, or the first end of the circulating pipeline 31 can be arranged in communication with the waste water end of the reverse osmosis membrane filter core 10 through the waste water pipe 71 of the self-cleaning water purifier, and the like, and the flexible adjustment and change do not deviate from the principle and range of the utility model, and should be included in the protection range of the utility model.

[0073] Preferably, as shown in FIGS. 1 and Figure 1 and Figure 2As shown, the self-cleaning water purifier further comprises a waste water pipe 71 and a waste water valve 72 arranged on the waste water pipe 71, the waste water pipe 71 is communicated with the waste water end of the reverse osmosis membrane filter core 10, and the first end of the circulating pipe 31 is communicated with the waste water pipe 71.

[0074] Through the arrangement, when the self-cleaning water purifier is in the normal water production mode, the waste water generated by the reverse osmosis membrane filter core 10 can be discharged through the waste water pipe 71, and when the self-cleaning assembly is in the cleaning mode, the cleaning liquid after cleaning the reverse osmosis membrane filter core 10 can be discharged through the waste water pipe 71. The waste water valve 72 is used to adjust the ratio of pure water and waste water when the reverse osmosis membrane filter core 10 filters water.

[0075] As shown in Figure 1 and Figure 2 In the embodiment of the utility model, the self-cleaning water purifier further comprises a pure water outlet pipe 64 and a pure water using member 65, and the pure water end of the reverse osmosis membrane filter core 10 is communicated with the pure water using member 65 through the pure water outlet pipe 64.

[0076] Through the arrangement, the pure water outlet pipe 64 can output the pure water generated by the reverse osmosis membrane filter core 10 to the pure water using member 65 for the user to use.

[0077] It should be noted that in actual application, the specific setting type of the pure water using member 65 is not limited by those skilled in the art, as long as the water at the pure water end of the reverse osmosis membrane filter core 10 can be output for the user to drink, for example, the pure water using member 65 can be arranged as a pure water tank, the pure water filtered by the reverse osmosis membrane filter core 10 is directly delivered into the pure water tank for the user to drink, or the pure water using member 65 can be arranged as a post-filter, the pure water filtered by the reverse osmosis membrane filter core 10 is delivered into the post-filter to improve the taste before being drunk by the user, or the pure water using member 65 can be arranged as a water outlet member (water outlet nozzle or faucet), the pure water filtered by the reverse osmosis membrane filter core 10 is directly delivered from the water outlet member (water outlet nozzle or faucet), and the like. The adjustment and change of the specific setting type of the pure water using member 65 do not deviate from the principles and scope of the utility model, and should be included in the protection scope of the utility model.

[0078] Preferably, the pure water using member 65 comprises a post-filter, and the pure water filtered by the reverse osmosis membrane filter core 10 is delivered into the post-filter to improve the taste before being drunk by the user.

[0079] Preferably, as shown in Figure 3 The self-cleaning water purifier further comprises a drain pipe 81 and a drain valve 82, one end of the drain pipe 81 is communicated with the pure water outlet pipe 64, the other end of the drain pipe 81 is communicated with the waste water pipe 71, and the drain valve 82 is arranged on the drain pipe 81 and is used to control the opening and closing of the drain pipe 81.

[0080] After the reverse osmosis membrane filter core 10 is cleaned by the self-cleaning water purifier, a small amount of cleaning liquid remains in the pure water end of the reverse osmosis membrane filter core 10. Therefore, the pure water containing cleaning agent residues in the pure water end of the reverse osmosis membrane filter core 10 after the self-cleaning water purifier is cleaned can flow out of the pure water end of the reverse osmosis membrane filter core 10 and flow into the wastewater pipe 71 through the drain pipe 81, avoiding that the user drinks the water containing cleaning agent residues.

[0081] It should be noted that the pure water containing cleaning agent residues in the pure water end of the reverse osmosis membrane filter core 10 is not limited to being drained through the drain pipe 81 and the drain valve 82. Any form that can drain the pure water containing cleaning agent residues in the pure water end of the reverse osmosis membrane filter core 10 does not deviate from the principles and scope of the present application and should be included in the protection scope of the present application.

[0082] Specifically, as shown in Figure 4 The self-cleaning water purifier further includes a backflow pipe 83 and a backflow valve 84. One end of the backflow pipe 83 is in communication with the pure water outlet pipe 64, and the other end of the backflow pipe 83 is in communication with the water inlet main path 50. The backflow valve 84 is arranged on the backflow pipe 83 and is used to control the opening and closing of the backflow pipe 83.

[0083] The water in the pure water end of the reverse osmosis membrane filter core 10 can be transported into the water inlet main path 50 through the backflow pipe 83 and then transported to the water inlet end of the reverse osmosis membrane filter core 10. After multiple filtrations, the pure water containing cleaning agent residues in the pure water end of the reverse osmosis membrane filter core 10 is drained, avoiding that the user drinks the pure water containing cleaning agent residues.

[0084] Through such a setting, after the cleaning assembly completes cleaning of the reverse osmosis membrane filter core 10, the backflow valve 84 is opened, and the water containing cleaning agent residues in the pure water end of the reverse osmosis membrane filter core 10 can be transported into the water inlet main path 50 through the backflow pipe 83 and then into the water inlet end of the reverse osmosis membrane filter core 10. After multiple filtrations, the pure water containing cleaning agent residues in the pure water end of the reverse osmosis membrane filter core 10 is drained, avoiding that the user drinks the pure water containing cleaning agent residues. When the self-cleaning water purifier is in a normal water production mode, the backflow valve 84 is closed, and the pure water filtered by the reverse osmosis membrane filter core 10 is transported into the pure water water-using component 65 through the pure water outlet pipe 64 for the user to drink.

[0085] It should be noted that in actual application, the user can control the circulating pump 32 to end the cleaning of the reverse osmosis membrane filter core 10 according to the value detected by the water quality detection component 40, or the water quality detection component 40 can be arranged in communication connection with the circulating pump 32 to automatically end the cleaning of the reverse osmosis membrane filter core 10, and the like. Such flexible adjustment and change do not deviate from the principles and scope of the present application and should be included in the protection scope of the present application.

[0086] Preferably, the circulating pump 32 is communicatively connected with the water quality detection member 40.

[0087] By setting the circulating pump 32 to be communicatively connected with the water quality detection member 40, the closing of the circulating pump 32 can be automatically controlled according to the water quality information detected by the water quality detection member 40, which helps to realize the intelligent control of the self-cleaning water purifier.

[0088] Specifically, when the water quality information in the cleaning circuit detected by the water quality detection member 40 no longer changes, it means that the reverse osmosis membrane filter core 10 is cleaned, and the circulating pump 32 is closed; when the water quality information in the cleaning circuit still changes, it means that the cleaning of the reverse osmosis membrane filter core 10 is not completed, and the circulating pump 32 continues to work.

[0089] It should be noted that in actual application, the specific connection mode between the circulating pump 32 and the water quality detection member 40 is not limited by those skilled in the art, for example, the circulating pump 32 and the water quality detection member 40 can be both set to be communicatively connected with the controller of the self-cleaning water purifier, the water quality detection member 40 transmits the detection signal to the controller, and the controller transmits the control signal to the circulating pump 32, or the circulating pump 32 and the water quality detection member 40 can be both set to be communicatively connected with the mobile device (mobile phone or tablet computer) of the user, the water quality detection member 40 transmits the detection signal to the mobile device, and the mobile device transmits the control signal to the circulating pump 32, and the like, and such flexible adjustment and change does not deviate from the principles and scope of the present application, and should be included in the protection scope of the present application.

[0090] Preferably, the circulating pump 32 and the water quality detection member 40 are both communicatively connected with the controller of the self-cleaning water purifier.

[0091] So far, the technical scheme of the present application has been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to related technical features without deviating from the principles of the present application, and the technical schemes after such changes or replacements will fall within the protection scope of the present application.

Claims

1. A self-cleaning water purifier, characterized by, The self-cleaning water purifier comprises: a reverse osmosis membrane filter cartridge; a cleaning assembly having a cleaning agent storage member, the cleaning assembly being capable of communicating with a water inlet end of the reverse osmosis membrane filter cartridge so as to deliver a cleaning liquid to the reverse osmosis membrane filter cartridge; a circulation pipeline having a first end communicating with a wastewater end of the reverse osmosis membrane filter cartridge and a second end communicating with the cleaning assembly, so that the cleaning assembly, the water inlet end of the reverse osmosis membrane filter cartridge and the wastewater end of the reverse osmosis membrane filter cartridge are sequentially communicated to form a cleaning loop; a circulation pump arranged on the cleaning loop to drive the circulation of liquid in the cleaning loop; and a water quality detection member arranged on the cleaning loop and used to detect water quality information in the cleaning loop. The water quality detection member comprises at least one of a TDS sensor, a PH value sensor or a turbidity sensor.

2. The self-cleaning water purifier according to claim 1, wherein The water quality detection member is arranged on the circulation pipeline. The self-cleaning water purifier further comprises a water inlet main pipeline communicating with the water inlet end of the reverse osmosis membrane filter cartridge, 3. The self-cleaning water purifier according to claim 1, wherein The cleaning assembly has a cleaning pipeline, two ends of the cleaning pipeline forming a cleaning inlet and a cleaning outlet respectively, the cleaning inlet communicating with the water inlet main pipeline so that water in the water inlet main pipeline enters the cleaning agent storage member through the cleaning inlet to form a cleaning liquid, and the cleaning outlet communicating with the water inlet main pipeline so that the cleaning liquid is delivered into the reverse osmosis membrane filter cartridge through the cleaning outlet. The cleaning assembly comprises a first cleaning pipeline and a first cleaning valve and a first cleaning agent storage member arranged on the first cleaning pipeline in sequence, the first cleaning agent storage member being located at a downstream end of the first cleaning valve and being used to store an acidic cleaning agent or an alkaline cleaning agent, and the circulation pump being arranged on the first cleaning pipeline.

4. The self-cleaning water purifier according to claim 3, wherein Alternatively, the cleaning assembly comprises a converging pipeline, at least two cleaning branches arranged in parallel, a second cleaning valve and a second cleaning agent storage member arranged on each cleaning branch, first ends of the cleaning branches converging and forming the cleaning inlet, second ends of the cleaning branches converging and communicating with the converging pipeline, a terminal end of the converging pipeline forming the cleaning outlet, the second cleaning agent storage member being located at a downstream end of the second cleaning valve, and the second cleaning agent storage member on each cleaning branch being used to store a different type of cleaning agent, and the circulation pump being arranged on the converging pipeline. The self-cleaning water purifier further comprises a first one-way valve arranged between the cleaning outlet and the circulation pump and capable of resisting water pressure in the water inlet main pipeline.

5. The self-cleaning water purifier according to claim 4, wherein Alternatively, the self-cleaning water purifier further comprises a second one-way valve arranged on the first cleaning pipeline and / or the cleaning branch and capable of preventing water in the water inlet main pipeline from flowing backward into the first cleaning agent storage member and / or the second cleaning agent storage member through the cleaning outlet. The self-cleaning water purifier further comprises a booster pump arranged on the water inlet main pipeline, and the cleaning outlet is located at a downstream end of the booster pump.

6. The self-cleaning water purifier according to claim 3, wherein ​ And / or, the self-cleaning water purifier further comprises a water inlet valve arranged on the water inlet main line and used for controlling the opening and closing of the water inlet main line, the cleaning inlet is located at the upstream end of the water inlet valve, and the cleaning outlet is located at the downstream end of the water inlet valve. And / or, the self-cleaning water purifier further comprises a pre-filter unit, a water outlet end of the pre-filter unit being communicated with the water inlet main line, and the cleaning inlet being located at the downstream end of the pre-filter unit.

7. The self-cleaning water purifier according to claim 3, wherein The self-cleaning water purifier further comprises a waste water pipe and a waste water valve arranged on the waste water pipe, the waste water pipe being communicated with a waste water end of the reverse osmosis membrane filter core, and a first end of the circulation pipeline being communicated with the waste water pipe.

8. The self-cleaning water purifier according to claim 7, wherein, The self-cleaning water purifier further comprises a pure water outlet pipe and a pure water water-using member, a pure water end of the reverse osmosis membrane filter core being communicated with the pure water water-using member through the pure water outlet pipe.

9. The self-cleaning water purifier according to claim 8, wherein, The self-cleaning water purifier further comprises a drain pipe and a drain valve, one end of the drain pipe being communicated with the pure water outlet pipe, the other end of the drain pipe being communicated with the waste water pipe, and the drain valve being arranged on the drain pipe and used for controlling the opening and closing of the drain pipe. Or, the self-cleaning water purifier further comprises a backflow pipe and a backflow valve, one end of the backflow pipe being communicated with the pure water outlet pipe, the other end of the backflow pipe being communicated with the water inlet main line, and the backflow valve being arranged on the backflow pipe and used for controlling the opening and closing of the backflow pipe.

10. The self-cleaning water purifier according to any one of claims 1 to 9, characterized in that, The circulation pump is communicatively connected with the water quality detection member.

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