Water purification equipment

Abstract

The utility model relates to the technical field of water purification, particularly provides water purification equipment, and aims to solve the problem that a booster pump is easy to break down after a reverse osmosis membrane filter element is cleaned by using a cleaning agent in the conventional water purification equipment. The water purification equipment comprises a reverse osmosis membrane filter element, a water inlet main path, a cleaning assembly, a booster pump, a circulating pipe and a circulating pump, the booster pump is arranged on the water inlet main path and located at the upstream end of a cleaning outlet, the first end of the circulating pipe is communicated with the wastewater end of the reverse osmosis membrane filter element, and the second end of the circulating pipe is communicated with the cleaning assembly; 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 are sequentially communicated to form a cleaning loop, and the circulating pump is arranged on the cleaning loop. By arranging the circulating pump, the cleaning liquid circularly flows in the cleaning loop, the cleaning effect on the reverse osmosis membrane filter element is improved, the cleaning liquid does not flow through the booster pump, a diaphragm in the booster pump is prevented from being damaged by the cleaning liquid, the service life of the booster pump is prolonged, and the use experience of a user is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to water purification technical field, specifically provide a water purification equipment. BACKGROUND

[0002] With the improvement of people's living standards, people's demand for drinking water is also getting higher and higher. Water purification equipment such as water purifier, net drinking integrated machine gradually becomes the necessary drinking water facilities in people's daily life.

[0003] After a long time of use, the dirt in the water will adhere to the reverse osmosis membrane filter element, affecting the water production rate of the water purification equipment, thereby affecting the service life of the reverse osmosis membrane filter element. After using the water purification equipment for a period of time, cleaning the reverse osmosis membrane filter element with a cleaning agent can remove the dirt adhering to the surface of the reverse osmosis membrane filter element, prolonging the service life of the reverse osmosis membrane filter element.

[0004] However, after cleaning the reverse osmosis membrane filter element of the existing water purification equipment, although the water production rate of the water purification equipment is improved, the booster pump is prone to failure, and since the cost of the booster pump is high, replacing the booster pump will further increase the cost of the water purification equipment, greatly affecting the user's experience. SUMMARY

[0005] The utility model aims to at least in a certain extent solve the above technical problem, that is, at least in a certain extent solve the problem that the existing water purification equipment is prone to booster pump failure after cleaning the reverse osmosis membrane filter element with a cleaning agent, resulting in poor user experience.

[0006] In the first aspect, the utility model provides a water purification equipment, which comprises: a reverse osmosis membrane filter element; a water inlet main path in communication with the water inlet end of the reverse osmosis membrane filter element; a cleaning assembly having a cleaning agent storage member and a cleaning outlet, the cleaning outlet being in communication with the water inlet end of the reverse osmosis membrane filter element to deliver cleaning liquid to the reverse osmosis membrane filter element; a booster pump arranged on the water inlet main path and located at the upstream end of the cleaning outlet; a circulation pipe, the first end of the circulation pipe being in communication with the wastewater end of the reverse osmosis membrane filter element, the second end of the circulation pipe being in communication with the cleaning assembly, so that 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 are sequentially communicated to form a cleaning loop; and a circulating pump arranged on the cleaning loop and used for circulating the cleaning liquid in the cleaning loop.

[0007] In the preferred technical scheme of the water purifying device, the cleaning assembly further comprises a cleaning pipeline, a cleaning valve and a cleaning agent storage member arranged in sequence on the cleaning pipeline, the cleaning agent storage member is located at the downstream end of the cleaning valve and is used for storing an acidic cleaning agent or an alkaline cleaning agent, and the circulating pump is arranged on the cleaning pipeline; or the cleaning assembly comprises a collecting pipeline, at least two cleaning pipelines arranged in parallel, a cleaning valve and a cleaning agent storage member arranged on each of the cleaning pipelines, the first ends of the cleaning pipelines are connected and form the cleaning inlet, the second ends of the cleaning pipelines are connected and communicated with the collecting pipeline, the end of the collecting pipeline forms the cleaning outlet, the cleaning agent storage members on each of the cleaning pipelines are used for storing different types of cleaning agents, and the circulating pump is arranged on the collecting pipeline.

[0008] In the preferred technical scheme of the water purifying device, the cleaning assembly further comprises a cleaning pipeline, a cleaning valve and a cleaning agent storage member arranged in sequence on the cleaning pipeline, the cleaning agent storage member is located at the downstream end of the cleaning valve and is used for storing an acidic cleaning agent or an alkaline cleaning agent, and the circulating pump is arranged on the cleaning pipeline; or the cleaning assembly comprises a collecting pipeline, at least two cleaning pipelines arranged in parallel, a cleaning valve and a cleaning agent storage member arranged on each of the cleaning pipelines, the first ends of the cleaning pipelines are connected and form the cleaning inlet, the second ends of the cleaning pipelines are connected and communicated with the collecting pipeline, the end of the collecting pipeline forms the cleaning outlet, the cleaning agent storage members on each of the cleaning pipelines are used for storing different types of cleaning agents, and the circulating pump is arranged on the collecting pipeline.

[0009] In the preferred technical scheme of the water purifying device, the cleaning assembly further comprises a first one-way valve located between the cleaning outlet and the circulating pump and capable of resisting the water pressure in the water inlet main pipeline; and / or the cleaning assembly further comprises a second one-way valve arranged on at least part of the cleaning pipeline and capable of preventing the liquid in the collecting pipeline from flowing back to the cleaning agent storage member.

[0010] In the preferred technical scheme of the water purifying device, the cleaning assembly further comprises a shunt pipeline and a control valve, the first end of the shunt pipeline forms the cleaning inlet, the first ends of the cleaning pipelines are connected and communicated with the second end of the shunt pipeline, the second end of the circulating pipeline is communicated with the second end of the shunt pipeline, and the control valve is arranged on the shunt pipeline and is used for controlling the opening and closing of the shunt pipeline.

[0011] In the preferred technical scheme of the water purifying device, the water purifying device further comprises a waste water outlet pipeline and a waste water valve arranged on the waste water outlet pipeline, wherein the waste water outlet pipeline is communicated with the waste water end of the reverse osmosis membrane filter core, the first end of the circulating pipeline is communicated with the waste water outlet pipeline and the first end of the circulating pipeline is located at the upstream end of the waste water valve; or the waste water end of the reverse osmosis membrane filter core is selectively communicated with the waste water outlet pipeline or the first end of the circulating pipeline.

[0012] In the preferred technical scheme of the water purification device, the water purification device further comprises a pre-filter unit, a water outlet end of the pre-filter unit being communicated with the water inlet main path, and the cleaning inlet being located at a downstream end of the pre-filter unit.

[0013] In the preferred technical scheme of the water purification device, the water purification device further comprises a water inlet valve arranged on the water inlet main path, the cleaning inlet being located at an upstream end of the water inlet valve, and the cleaning outlet being located at a downstream end of the water inlet valve.

[0014] In the preferred technical scheme of the water purification device, the water purification device further comprises a pure water outlet pipe and a pure water water-using component, a pure water end of the reverse osmosis membrane filter core being communicated with the pure water water-using component through the pure water outlet pipe.

[0015] In the preferred technical scheme of the water purification device, the water purification device 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 outlet pipe, and the drain valve being arranged on the drain pipe and being used for controlling opening and closing of the drain pipe; or, the water purification device 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 an upstream end of the booster pump, and the backflow valve being arranged on the backflow pipe and being used for controlling opening and closing of the backflow pipe.

[0016] In the case of adopting the preferred technical scheme, 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 a cleaning loop, and the cleaning liquid can flow in the cleaning loop, so that the cleaning liquid repeatedly flushes the reverse osmosis membrane filter core, the cleaning efficiency is improved, and the cleaning effect is improved. On the other hand, by arranging the booster pump at the upstream end of the cleaning outlet, the cleaning liquid in the cleaning agent storage component can be prevented from flowing through the booster pump, so that the cleaning liquid can corrode the diaphragm in the booster pump. At the same time, by arranging the circulating pump, the cleaning liquid can flow in the cleaning loop under the action of the circulating pump. Compared with the form that the cleaning liquid flows in the cleaning loop under the action of the booster pump, the cleaning liquid can be prevented from entering the booster pump to corrode the diaphragm in the booster pump, so that the service life of the booster pump is prolonged. Moreover, the cost of the circulating pump is much lower than that of the booster pump, and the arrangement of the circulating pump can greatly reduce the cost of the water purification device, and greatly improves the user experience.

[0017] Further, compared with setting the cleaning assembly in the form of only having the cleaning outlet, setting the cleaning assembly in the form of having the cleaning inlet and the cleaning outlet can make the cleaning assembly 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.

[0018] Still further, setting the cleaning agent assembly to include at least two cleaning pipelines arranged in parallel can make the cleaning assembly use multiple cleaning agents to clean the reverse osmosis membrane filter element, so that different types of dirt on the reverse osmosis membrane filter element can be removed, and the cleaning efficiency and cleaning effect of the reverse osmosis membrane filter element can be improved.

[0019] Still further, by setting the first one-way valve, when the water purification equipment is in the normal water production mode, the water pressure in the water inlet main line can be resisted, and the problem of water leakage of the circulating pump caused by excessive water pressure can be avoided, and the user experience is further improved; by setting the second one-way valve, when the cleaning agent on one of the cleaning pipelines is used to clean the reverse osmosis membrane filter element, the liquid in the manifold can be prevented from flowing back to the cleaning agent storage member, so that the cleaning agent can be prevented from being dissolved too early.

[0020] Still further, by setting the cleaning inlet at the downstream end of the pre-filter unit, the purified water filtered by the pre-filter unit can enter the cleaning agent storage member through the cleaning inlet, and the cleaning agent can be dissolved by the purified water filtered by the pre-filter unit, so that the solubility of the cleaning agent and the cleanliness of the cleaning liquid can be improved, and the cleaning effect of the reverse osmosis membrane filter element can be effectively improved.

[0021] Still further, by setting the cleaning inlet at the upstream end of the water inlet valve and setting the cleaning outlet at the downstream end of the water inlet valve, when the reverse osmosis membrane filter element needs to be cleaned, the water in the water inlet main line can be prevented from directly entering the reverse osmosis membrane filter element by controlling the water inlet valve, so that the cleaning liquid in the reverse osmosis membrane filter element can be prevented from being diluted.

[0022] Still further, by setting the drain pipe and the drain valve, after the reverse osmosis membrane filter element is cleaned, the drain valve is first opened, so that the water containing a small amount of cleaning agent at the pure water end of the reverse osmosis membrane filter element flows into the wastewater outlet pipe through the drain pipe, and when the pure water containing the cleaning agent is completely discharged, the drain valve is closed, so that the water at the pure water end of the reverse osmosis membrane filter element flows into the pure water water member through the pure water outlet pipe, thereby the cleaning agent can be more completely discharged, and zero addition and zero chemical pollution can be achieved.

[0023] Further, by setting the backflow pipe and the backflow valve, the pure water containing a small amount of cleaning agent permeating to the pure water end of the reverse osmosis membrane filter core can be discharged to the upstream end of the booster pump after the cleaning of the reverse osmosis membrane filter core is completed, and is further filtered through the reverse osmosis membrane filter core, so that the cleaning agent can be discharged more completely, which helps to realize zero addition and zero pollution of the reverse osmosis membrane filter core regeneration process. On the other hand, when the water purification equipment is in the normal water production mode and does not produce water for a long time, the reverse osmosis membrane filter core will have the case that the TDS value of the first cup of water increases. The first cup of water can also be backflowed to the upstream end of the booster pump through the backflow pipe to prevent the user from drinking water with a high TDS value. BRIEF DESCRIPTION OF DRAWINGS

[0024] The preferred embodiments of the present application will be described below with reference to the accompanying drawings, in which:

[0025] Figure 1 is a structural schematic view of an embodiment one of the water purification equipment of the present application;

[0026] Figure 2 is a structural schematic view of an embodiment two of the water purification equipment of the present application;

[0027] Figure 3 is a structural schematic view of an embodiment three of the water purification equipment of the present application;

[0028] Figure 4 is a structural schematic view of an embodiment four of the water purification equipment of the present application;

[0029] Figure 5 is a structural schematic view of an embodiment five of the water purification equipment of the present application;

[0030] Figure 6 is a structural schematic view of an embodiment six of the water purification equipment of the present application;

[0031] Figure 7 is a structural schematic view of an embodiment seven of the water purification equipment of the present application;

[0032] Figure 8 is a structural schematic view of an embodiment eight of the water purification equipment of the present application.

[0033] LIST OF REFERENCE NUMBERS:

[0034] 1, water inlet main path; 11, water inlet valve; 12, booster pump; 2, reverse osmosis membrane filter core; 21, waste water outlet pipe; 211, waste water valve; 212, stop valve; 22, drain pipe; 221, drain valve; 23, backflow pipe; 231, backflow valve; 301, cleaning inlet; 302, cleaning outlet; 31, cleaning pipeline; 311, first cleaning pipe; 312, second cleaning pipe; 32, cleaning valve; 321, first cleaning valve; 322, second cleaning valve; 33, cleaning agent storage member; 331, first cleaning agent storage member; 332, second cleaning agent storage member; 341, first one-way valve; 342, second one-way valve; 343, third one-way valve; 35, manifold; 36, shunt pipe; 361, control valve; 4, pre-filter unit; 5, pure water outlet pipe; 51, pure water water member; 52, water quality detection member; 61, circulation pipe; 62, circulation pump; 7, reversing valve. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] 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.

[0038] As shown in Figure 1 and Figure 2 The water purification equipment of the present application comprises a reverse osmosis membrane filter core 2, a water inlet main path 1, a cleaning assembly, a booster pump 12, a circulation pipe 61 and a circulation pump 62, and the water inlet main path 1 is in communication with the water inlet end of the reverse osmosis membrane filter core 2.

[0039] The cleaning assembly has a cleaning agent storage member 33 and a cleaning outlet 302 capable of communicating with the water inlet end of the reverse osmosis membrane filter cartridge 2 to deliver the cleaning liquid to the reverse osmosis membrane filter cartridge 2. The booster pump 12 is arranged on the water inlet main line 1 and located at the upstream end of the cleaning outlet 302.

[0040] The first end of the circulation pipe 61 communicates with the wastewater end of the reverse osmosis membrane filter cartridge 2, and the second end of the circulation pipe 61 communicates with the cleaning assembly, so that the cleaning assembly, the water inlet end of the reverse osmosis membrane filter cartridge 2 and the wastewater end of the reverse osmosis membrane filter cartridge 2 are sequentially communicated to form a cleaning loop. The circulation pump 62 is arranged on the cleaning loop and used to circulate the cleaning liquid in the cleaning loop.

[0041] Through such an arrangement, on the one hand, the cleaning assembly, the water inlet end of the reverse osmosis membrane filter cartridge 2 and the wastewater end of the reverse osmosis membrane filter cartridge 2 are sequentially communicated to form a cleaning loop, and the cleaning liquid can be circulated in the cleaning loop, so that the cleaning liquid repeatedly flushes the reverse osmosis membrane filter cartridge 2, improves the cleaning efficiency and enhances the cleaning effect. On the other hand, by arranging the booster pump 12 at the upstream end of the cleaning outlet 302, the cleaning liquid in the cleaning agent storage member can be prevented from flowing through the booster pump 12, thereby avoiding damage to the diaphragm in the booster pump 12. At the same time, by arranging the circulation pump 62, the cleaning liquid can be circulated in the cleaning loop under the action of the circulation pump 62. Compared with the form of circulating the cleaning liquid in the cleaning loop by the booster pump 12, the cleaning liquid can be prevented from entering the booster pump 12 to corrode the diaphragm in the booster pump 12. Moreover, the cost of the circulation pump 62 is much lower than that of the booster pump 12. Arranging the circulation pump 62 can also greatly reduce the cost of the water purification equipment, thereby prolonging the service life of the booster pump 12 and greatly improving the user experience.

[0042] It should be noted that when the reverse osmosis membrane filter cartridge 2 has been used for a short time, the cleaning assembly can clean the reverse osmosis membrane filter cartridge 2 to remove all dirt on the reverse osmosis membrane filter cartridge 2, thereby regenerating the reverse osmosis membrane filter cartridge 2. When the reverse osmosis membrane filter cartridge 2 has been used for a long time, the cleaning assembly can clean the reverse osmosis membrane filter cartridge 2 to remove most of the dirt on the reverse osmosis membrane filter cartridge 2, thereby greatly regenerating the reverse osmosis membrane filter cartridge 2.

[0043] It should be further noted that in actual application, the reverse osmosis membrane filter cartridge 2 can be arranged to have two water inlet ports, the water inlet main line 1 and the cleaning outlet 302 can be arranged to communicate with the two water inlet ports, or the cleaning outlet 302 can be arranged to communicate with the water inlet main line 1, the cleaning assembly can deliver the cleaning liquid to the reverse osmosis membrane filter cartridge 2 through the water inlet main line 1, 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.

[0044] It also needs to be explained that in actual application, the specific setting type of the cleaning assembly is not limited, for example, the cleaning assembly can be set to only have the cleaning outlet 302, that is, a large amount of cleaning liquid is directly stored in the cleaning agent storage member 33, when the reverse osmosis membrane filter core 2 needs to be cleaned, the cleaning agent stored in the cleaning agent storage member 33 flows out from the cleaning outlet 302 and is transported into the reverse osmosis membrane filter core 2, or the cleaning assembly can also be set to include the cleaning pipeline 31 and the cleaning agent storage member 33 arranged on the cleaning pipeline 31, the two ends of the cleaning pipeline 31 form the cleaning inlet 301 and the cleaning outlet 302 respectively, water is injected into the cleaning inlet 301 so as to form the cleaning liquid in the cleaning agent storage member 33, 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 utility model, and should be included in the protection scope of the utility model.

[0045] Preferably, as shown in Figure 1 and Figure 2 The cleaning assembly also has the cleaning pipeline 31, the two ends of the cleaning pipeline 31 form the cleaning inlet 301 and the cleaning outlet 302 respectively, the cleaning inlet 301 is in communication with the water inlet main line 1, so that the water in the water inlet main line 1 enters the cleaning agent storage member 33 through the cleaning inlet 301 to form the cleaning liquid, the cleaning outlet 302 is in communication with the water inlet main line 1, so that the cleaning liquid is transported into the reverse osmosis membrane filter core 2 through the cleaning outlet 302, the second end of the circulating pipeline 61 is in communication with the cleaning pipeline 31, and the circulating pump 62 is arranged on the cleaning pipeline 31.

[0046] Through such a setting, compared with the form of setting the cleaning assembly to only have the cleaning outlet 302, the form of setting the cleaning assembly to have the cleaning inlet 301 and the cleaning outlet 302 can make the cleaning assembly form the cleaning liquid by injecting water into the cleaning inlet 301 during cleaning, avoid storing a large amount of cleaning liquid in the cleaning agent storage member 33 to cause the volume of the cleaning assembly to be too large, and further improve the user's use experience.

[0047] It needs to be explained that in actual application, the circulating pump 62 is not limited to being arranged on the cleaning pipeline 31, for example, the circulating pump 62 can also be arranged on the circulating pipeline 61, or the circulating pump 62 can also be arranged on the water inlet main line 1 between the cleaning outlet 302 and the reverse osmosis membrane filter core 2, and the like, the adjustment and change of the specific setting position of the circulating pump 62 do not deviate from the principles and scope of the utility model, and should be included in the protection scope of the utility model.

[0048] Of course, preferably, the circulating pump 62 is arranged on the cleaning pipeline 31.

[0049] It should be noted that in actual application, the specific structure of the cleaning assembly is not limited in the present application, as long as the cleaning pipe 31 and the cleaning agent storage member 33 are provided, and the two ends of the cleaning pipe form the cleaning inlet 301 and the cleaning outlet 302.

[0050] The cleaning assembly of the present application will be described below in combination with Figure 1 and Figure 2 two embodiments.

[0051] Embodiment 1:

[0052] As shown in Figure 1 , the cleaning assembly comprises a cleaning pipe 31 and a cleaning valve and a cleaning agent storage member 33 arranged in sequence on the cleaning pipe 31, the cleaning agent storage member 33 is located at the downstream end of the cleaning valve 32 and is used to store acidic or alkaline cleaning agent, and a circulating pump 62 is arranged on the cleaning pipe 31.

[0053] It should be noted that the circulating pump 62 is not limited to being arranged on the cleaning pipe 31, for example, the circulating pump 62 can also be arranged on the circulating pipe 61, or the circulating pump 62 can also be arranged on the water inlet main line 1 between the cleaning outlet 302 and the reverse osmosis membrane filter element 2, etc., and such adjustment and change of the specific arrangement position of the circulating pump 62 on the cleaning circuit does 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 circulating pump 62 is arranged on the cleaning pipe 31.

[0054] Preferably, the cleaning assembly further comprises a first check valve 341 arranged between the cleaning outlet 302 and the circulating pump 62 and capable of resisting the water pressure in the water inlet main line 1.

[0055] In order to reduce cost and increase efficiency, the circulating pump 62 is preferably arranged as a water pump with low cost and poor pressure resistance. When the water purification equipment is in a normal water production mode, the water pressure in the water inlet main line 1 is too large, the first check valve 341 can resist the water pressure in the water inlet main line 1, avoid the problem of water leakage of the circulating pump due to excessive water pressure, and further improve the user's experience.

[0056] It should be noted that the first check valve 341 can also prevent the water in the water inlet main line 1 from flowing back to the cleaning agent storage member 33 through the cleaning outlet 302, and avoid the cleaning agent from dissolving too early.

[0057] When the cleaning assembly cleans the reverse osmosis membrane filter cartridge 2, the cleaning valve 32 is opened, the water in the water inlet main circuit 1 enters the cleaning agent storage member 33 through the cleaning inlet 301, and the cleaning agent stored in the cleaning agent storage member 33 is dissolved to form a cleaning liquid, which is then discharged through the cleaning outlet 302 and transported into the reverse osmosis membrane filter cartridge 2, and then the cleaning liquid is used to soak the reverse osmosis membrane filter cartridge 2, and then the cleaning valve 32 is closed, and the circulating pump 62 is started, and the cleaning liquid in the reverse osmosis membrane filter cartridge 2 circulates in the cleaning circuit to flush the reverse osmosis membrane filter cartridge 2 multiple times to remove dirt on the reverse osmosis membrane filter cartridge 2.

[0058] It should be noted that in actual application, the person skilled in the art can store cleaning agents in the cleaning agent storage member 33 according to actual application requirements, for example, an acidic cleaning agent can be stored in the cleaning agent storage member 33, or an alkaline cleaning agent can be stored in the cleaning agent storage member 33, etc., and such adjustment and change of the type of cleaning agent in the cleaning agent storage member 33 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 person skilled in the art can set the second end of the circulating pipe 61 to communicate with the upstream end of the cleaning valve 32, or can set the second end of the circulating pipe 61 to communicate with the downstream end of the cleaning valve 32, etc., 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, the second end of the circulating pipe 61 is set to communicate with the downstream end of the cleaning valve 32.

[0061] Through such a setting, when the circulating pump 62 is started, the cleaning valve 32 can be closed to avoid the cleaning liquid in the cleaning circuit from flowing back to the water inlet main circuit 1 to pollute the water inlet main circuit 1.

[0062] Embodiment 2:

[0063] As shown in Figure 2 The cleaning assembly includes a converging pipe 35, at least two parallelly arranged cleaning pipes, a cleaning valve 32 and a cleaning agent storage member 33 arranged on each cleaning pipe, the first ends of the multiple cleaning pipes converge and form a cleaning inlet 301, the second ends of the multiple cleaning pipes 31 converge and communicate with the converging pipe 35, the end of the converging pipe 35 forms a cleaning outlet 302, the cleaning agent storage member 33 is located at the downstream end of the cleaning valve 32, the cleaning agent storage member 33 on each cleaning pipe is used to store different types of cleaning agents, and the circulating pump 62 is arranged on the converging pipe 35.

[0064] It should be noted that the circulating pump 62 is not limited to be arranged on the manifold 35, for example, the circulating pump 62 can also be arranged on the circulating pipe 61, or the circulating pump 62 can also be arranged on the water inlet main line 1 between the cleaning outlet 302 and the reverse osmosis membrane filter element 2, and the like, and the adjustment and change of the specific arrangement position of the circulating pump 62 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 circulating pump 62 is arranged on the manifold 35.

[0065] Preferably, the cleaning assembly further comprises a first one-way valve 341 arranged between the cleaning outlet 302 and the circulating pump 62 and capable of resisting the water pressure in the water inlet main line 1.

[0066] Through such an arrangement, when the water purification equipment is in a normal water production mode, the water pressure in the water inlet main line 1 is too large, the first one-way valve 341 can resist the water pressure in the water inlet main line 1, avoiding the problem of water leakage of the circulating pump 62 due to excessive water pressure, and further improving the user experience.

[0067] Preferably, the cleaning assembly further comprises a second one-way valve 342 arranged on at least part of the cleaning pipe 31, the second one-way valve 342 being arranged between the cleaning circuit 302 and the cleaning agent storage member 33 and capable of preventing the liquid in the manifold 35 from flowing back to the cleaning agent storage member 33.

[0068] Through such an arrangement, when the cleaning agent on one of the cleaning pipes 31 is used to clean the reverse osmosis membrane filter element 2, the liquid in the manifold 35 can be prevented from flowing back to the cleaning agent storage member 33, thereby avoiding the cleaning agent from being dissolved too early.

[0069] It should be noted that in actual application, the second one-way valve 342 can be arranged on only part of the cleaning pipe 31, or the second one-way valve 342 can be arranged on all the cleaning pipes 31, and the like, and the adjustment and change of the specific arrangement position of the second one-way valve 342 on the cleaning pipe 31 do not deviate from the principles and scope of the present application, and should be included in the protection scope of the present application.

[0070] Preferably, as shown in FIG. 4, the second one-way valve 342 is arranged on only part of the cleaning pipe 31, so that the cost of the water purification equipment can be further saved. Figure 4

[0071] ​It should be noted that, not limited to setting the second one-way valve 342 to prevent the liquid from flowing back to the cleaning agent storage member 33, for example, a backflow prevention structure can also be provided in the cleaning agent storage member 33 to prevent the liquid from flowing back to the cleaning agent storage member 33, 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.

[0072] Preferably, as shown in Figures 1 to 8 The cleaning assembly further includes a third one-way valve 343 provided on the circulation pipe 61, and the third one-way valve is used to prevent the liquid at the second end of the circulation pipe 61 from flowing back to the first end of the circulation pipe 61.

[0073] It should be noted that in actual application, the present application does not make any limitation on the specific number of the parallelly arranged cleaning pipelines, for example, 2 parallelly arranged cleaning pipelines can be provided, the cleaning valve 32 and the cleaning agent storage member 33 are respectively arranged on the 2 cleaning pipelines, or 3 parallelly arranged cleaning pipelines can be provided, the cleaning valve 32 and the cleaning agent storage member 33 are respectively arranged on the 3 cleaning pipelines, or a plurality of parallelly arranged cleaning pipelines can be provided, the cleaning valve 32 and the cleaning agent storage member 33 are respectively arranged on the plurality of cleaning pipelines, and the like, such adjustment and change of the specific number of the parallelly arranged cleaning pipelines 31 does not deviate from the principles and scope of the present application, and should be included in the protection scope of the present application.

[0074] Next, taking the case of providing 2 parallelly arranged cleaning pipelines as an example for introduction.

[0075] Specifically, as shown in Figure 2 The cleaning assembly includes a flow collection pipe 35, a first cleaning pipe 311 and a second cleaning pipe 312 arranged in parallel, the first cleaning pipe 311 is provided with a first cleaning valve 321 and a first cleaning agent storage member 331, the second cleaning pipe 312 is provided with a second cleaning valve 322 and a second cleaning agent storage member 332, the first end of the first cleaning pipe 311 and the first end of the second cleaning pipe 312 are connected and form a cleaning inlet 301, the second end of the first cleaning pipe 311 and the second end of the second cleaning pipe 312 are connected and communicate with the flow collection pipe 35, and the end of the flow collection pipe 35 forms a cleaning outlet 302, the first cleaning agent storage member 331 is located at the downstream end of the first cleaning valve 321 and is used to store an acidic cleaning agent, the second cleaning agent storage member 332 is located at the downstream end of the second cleaning valve 322 and is used to store an alkaline cleaning agent, and a circulation pump 62 is arranged on the flow collection pipe 35.

[0076] It should be noted that in actual application, the second end of the circulation pipe 61 can be arranged in communication with the upstream ends of the first and second cleaning agent storage members 331 and 332, or the second end of the circulation pipe 61 can be arranged in communication with the downstream ends of the first and second cleaning agent storage members 331 and 332, and the like, and such adjustment and change of the specific connection position of the second end of the circulation pipe 61 with the first and second cleaning pipes 311 and 312 do not deviate from the principles and scope of the present application, and should be included in the protection scope of the present application.

[0077] Preferably, as shown in Figure 2 The cleaning assembly further comprises a shunt pipe 36 and a control valve 361, the first end of the shunt pipe 36 forms the cleaning inlet 301, the first ends of the first and second cleaning pipes 311 and 312 meet and are in communication with the second end of the shunt pipe 36, the second end of the circulation pipe 61 is in communication with the second end of the shunt pipe 36, and the control valve 361 is arranged on the shunt pipe 36 and is used to control the opening and closing of the shunt pipe 36.

[0078] Through such arrangement, the second end of the circulation pipe 61 can be in communication with the upstream ends of the first and second cleaning agent storage members 331 and 332, so that the cleaning agent in the first and second cleaning agent storage members 331 and 332 is completely delivered into the reverse osmosis membrane filter element 2, thereby improving the cleaning effect of the reverse osmosis membrane filter element 2, and meanwhile, the control valve 361 arranged on the shunt pipe 36 can also prevent the cleaning liquid in the cleaning circuit from flowing back to the water inlet main circuit 1 and polluting the water inlet main circuit 1.

[0079] It should be noted that when the reverse osmosis membrane filter element 2 is cleaned, the reverse osmosis membrane filter element 2 can be first cleaned by using an acidic cleaning agent, and then cleaned by using an alkaline cleaning agent, or the reverse osmosis membrane filter element 2 can be first cleaned by using an alkaline cleaning agent, and then cleaned by using an acidic cleaning agent, 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.

[0080] Hereinafter, the cleaning process of the reverse osmosis membrane filter element 2 will be introduced by taking the example that the reverse osmosis membrane filter element 2 is first cleaned by using an acidic cleaning agent, and then cleaned by using an alkaline cleaning agent.

[0081] As shown in Figure 2As shown, the first cleaning valve 321 is opened, the second cleaning valve 322 remains closed, the water in the water inlet main line 1 enters the first cleaning pipe 311, and the first cleaning liquid (i.e. the acidic solution) is formed in the first cleaning agent storage member 331, then is discharged through the cleaning outlet 302 and transported into the reverse osmosis membrane filter element 2, at this time, the first cleaning pipe 311, the water inlet end of the reverse osmosis membrane filter element 2 and the wastewater end of the reverse osmosis membrane filter element 2 are sequentially communicated to form a cleaning loop, the circulating pump 62 is started to make the first cleaning liquid circulate in the cleaning loop, the reverse osmosis membrane filter element 2 is soaked and circularly flushed to remove the inorganic dirt on the reverse osmosis membrane filter element 2, after the cleaning is completed, the liquid in the reverse osmosis membrane filter element 2 is discharged and flushed, then the first cleaning valve 321 is closed and the second cleaning valve 322 is opened, the water in the water inlet main line 1 enters the second cleaning pipe 312, and the second cleaning liquid (i.e. the alkaline solution) is formed in the second cleaning agent storage member 332, at this time, the second cleaning pipe 312, the water inlet end of the reverse osmosis membrane filter element 2 and the wastewater end of the reverse osmosis membrane filter element 2 are sequentially communicated to form a cleaning loop, then is discharged through the cleaning outlet 302 and transported into the reverse osmosis membrane filter element 2, the circulating pump 62 is started to make the second cleaning agent circulate in the cleaning loop, the reverse osmosis membrane filter element 2 is soaked and circularly flushed to remove the organic dirt on the reverse osmosis membrane filter element 2.

[0082] It should be noted that the specific type of the acidic cleaning agent is not limited in the utility model, for example, the acidic cleaning agent can be 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 substances, and the person skilled in the art can adjust according to actual needs.

[0083] 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 2.

[0084] It should be noted that the specific type of the alkaline cleaning agent is not limited in the utility model, for example, the alkaline cleaning agent can be 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 substances, and the person skilled in the art can adjust according to actual needs.

[0085] It also needs to be explained that the utility model does not make any limitation to the form of the cleaning agent in the first cleaning agent storage member 331 and the second cleaning agent storage member 332, for example, the cleaning agent in the first cleaning agent storage member 331 and the second cleaning agent storage member 332 can all be arranged as solid, or the cleaning agent in the first cleaning agent storage member 331 and the second cleaning agent storage member 332 can all be arranged as liquid cleaning agent, or one of the first cleaning agent storage member 331 and the second cleaning agent storage member 332 can be arranged as solid cleaning agent and the other can be arranged as liquid cleaning agent, etc., and the adjustment and change of the specific form of the cleaning agent stored in the first cleaning agent storage member 331 and the second cleaning agent storage member 332 do not deviate from the principles and scope of the utility model, and should all be included in the protection scope of the utility model.

[0086] Preferably, the cleaning agent stored in the first cleaning agent storage member 331 and the second cleaning agent storage member 332 is solid.

[0087] Further preferably, in order to accelerate the dissolution of the cleaning agent, the cleaning agent is granular or powdery.

[0088] It needs to be explained that although the utility model is introduced above with the two kinds of embodiments as examples to introduce the specific form of the cleaning assembly, but this is not restrictive, for example, the cleaning assembly can also include a plurality of cleaning pipelines 31 and a plurality of cleaning agent storage members 33 arranged on the cleaning pipe, etc., and the adjustment and change of the specific setting form of the cleaning assembly do not deviate from the principles and scope of the utility model, and should all be included in the protection scope of the utility model.

[0089] It needs to be explained that in actual application, the utility model does not make any limitation to the specific connection mode between the wastewater end of the reverse osmosis membrane filter core 2 and the first end of the circulating pipe 61, for example, the wastewater outlet pipe 21 can be arranged in communication with the wastewater end of the reverse osmosis membrane filter core 2, the first end of the circulating pipe 61 is arranged in communication with the wastewater outlet pipe 21, or the wastewater end of the reverse osmosis membrane filter core 2 can be arranged to selectively communicate with the first end of the circulating pipe 61 or the wastewater outlet pipe 21, etc., and the flexible adjustment and change do not deviate from the principles and scope of the utility model, and should all be included in the protection scope of the utility model.

[0090] The following two cases are introduced below.

[0091] Case 1:

[0092] For example, Figure 1 And Figure 2The water purification equipment further comprises a waste water outlet pipe 21 and a waste water valve 211 arranged on the waste water outlet pipe 21, the waste water outlet pipe 21 is communicated with a waste water end of the reverse osmosis membrane filter core 2, and the first end of the circulating pipe 61 is communicated with the waste water outlet pipe 21 and located at an upstream end of the waste water valve 211.

[0093] By arranging the waste water outlet pipe 21, when normal water is produced, waste water generated by the reverse osmosis membrane filter core 2 can flow out through the waste water outlet pipe 21, and when the reverse osmosis membrane filter core 2 is cleaned, the cleaning waste water can also flow out through the waste water outlet pipe 21, so that the cleaning waste water in the reverse osmosis membrane filter core 2 can be discharged without additional drainage members, and the cost of the water purification equipment is reduced.

[0094] It should be noted that in actual application, the first end of the circulating pipe 61 is not limited to being arranged at the upstream end of the waste water valve 211, for example, the first end of the circulating pipe 61 can also be arranged at the downstream end of the waste water valve 211, and the like, and such flexible adjustment and change does not deviate from the principles and ranges of the present application and should be included in the protection scope of the present application.

[0095] Of course, preferably, as shown in Figure 1 and Figure 2 the first end of the circulating pipe 61 is arranged at the upstream end of the waste water valve 211.

[0096] Through such arrangement, when the cleaning assembly cleans the reverse osmosis membrane filter core 2, the dirt cleaned can be prevented from entering the waste water valve 211 to cause the waste water valve 211 to be blocked, and the service life of the waste water valve 211 can be prolonged.

[0097] It should be noted that in actual application, the waste water valve 211 can be arranged in a type having a cut-off function, when the reverse osmosis membrane filter core 2 needs to be cleaned, the waste water outlet pipe 21 is controlled to be opened or closed by adjusting the waste water valve 211 to prevent the water in the reverse osmosis membrane filter core 2 from flowing out through the waste water outlet pipe 21, or a cut-off valve 212 can be arranged on the waste water outlet pipe 21, when the reverse osmosis membrane filter core 2 needs to be cleaned, the water in the reverse osmosis membrane filter core 2 is prevented from flowing out through the waste water outlet pipe 21 by closing the cut-off valve 212, and the like, and such adjustment and change of the specific arrangement type of the waste water valve 211 does not deviate from the principles and ranges of the present application and should be included in the protection scope of the present application.

[0098] Preferably, as shown in Figure 1 and Figure 2As shown, the water purification device further comprises a stop valve 212 arranged on the wastewater outlet pipe 21 and used for controlling the opening and closing of the wastewater outlet pipe 21.

[0099] Case 2:

[0100] As shown in Figure 3 and Figure 4 As shown, the water purification device further comprises a wastewater outlet pipe 21 and a wastewater valve 211 arranged on the wastewater outlet pipe 21, and the wastewater end of the reverse osmosis membrane filter element 2 can selectively communicate with the wastewater outlet pipe 21 or the first end of the circulation pipe 61.

[0101] Through such an arrangement, when the water purification device is in a normal water production mode, the wastewater end of the reverse osmosis membrane filter element 2 is communicated with the wastewater outlet pipe 21, and the filtered wastewater flows out through the wastewater outlet pipe 21, and when the water purification device is in a cleaning mode, the wastewater end of the reverse osmosis membrane filter element 2 is communicated with the first end of the circulation pipe 61, so that the cleaning assembly, the water inlet end of the reverse osmosis membrane filter element 2 and the wastewater end of the reverse osmosis membrane filter element 2 are sequentially communicated to form a cleaning loop, thereby achieving convenient switching between the water production mode and the cleaning mode, and further improving the user experience.

[0102] It should be noted that, in actual application, the specific communication mode of the water purification device for selectively communicating the wastewater end of the reverse osmosis membrane filter element 2 with the wastewater outlet pipe 21 or the first end of the circulation pipe 61 is not limited in any way, for example, a reversing valve 7 can be arranged, wherein the first interface of the reversing valve 7 is communicated with the wastewater end of the reverse osmosis membrane filter element 2, the second interface of the reversing valve 7 is communicated with the wastewater outlet pipe 21, and the third interface of the reversing valve 7 is communicated with the first end of the circulation pipe 61, or a three-way pipe 8 can also be arranged, wherein the first end of the three-way pipe 8 is communicated with the wastewater end of the reverse osmosis membrane filter element 2, the second end and the third end of the three-way pipe 8 are respectively communicated with the wastewater outlet pipe 21 or the first end of the circulation pipe 61, and the first valve and the second valve are respectively arranged on the wastewater outlet pipe 21 and the circulation pipe 61 to enable the wastewater end of the reverse osmosis membrane filter element 2 to selectively communicate with the wastewater outlet pipe 21 or the first end of the circulation pipe 61, 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.

[0103] Preferably, as shown in Figure 3 and Figure 4 The water purification device further comprises a reversing valve 7, wherein the first interface of the reversing valve 7 is communicated with the wastewater end of the reverse osmosis membrane filter element 2, the second interface of the reversing valve 7 is communicated with the wastewater outlet pipe 21, and the third interface of the reversing valve 7 is communicated with the first end of the circulation pipe 61, and the first interface of the reversing valve 7 can selectively communicate with the second interface or the third interface.

[0104] Through the arrangement, the pipeline connection can be further simplified, and the simplicity of the water purification equipment is improved.

[0105] Preferably, as shown in the drawings, the water purification equipment further comprises a pre-filter unit 4, a water outlet end of the pre-filter unit 4 is communicated with the water inlet main line 1, and the cleaning inlet 301 is located at a downstream end of the pre-filter unit 4. Figures 1 to 4

[0106] Through the arrangement, that is, by arranging the cleaning inlet 301 to be located at the downstream end of the pre-filter unit, the purified water filtered by the pre-filter unit 4 can enter the cleaning agent storage member 33 through the cleaning inlet 301, and the cleaning agent is dissolved by the purified water filtered by the pre-filter unit 4, so that the solubility of the cleaning agent and the cleanliness of the cleaning liquid are improved, thereby effectively improving the cleaning effect of the reverse osmosis membrane filter core 2.

[0107] It should be noted that in actual application, the pre-filter unit 4 can be arranged as a pre-filter core, or the pre-filter unit 4 can be arranged as a composite filter core including a pre-filter core and a post-filter core, and the like, and such adjustment and change of the specific type of the pre-filter unit 4 do not deviate from the principles and scope of the present application, and should be included in the protection scope of the present application.

[0108] Preferably, the pre-filter unit 4 is a pre-filter core.

[0109] Preferably, as shown in the drawings, the water purification equipment further comprises a water inlet valve 11 arranged on the water inlet main line 1, the cleaning inlet 301 is located at an upstream end of the water inlet valve 11, and the cleaning outlet 302 is located at a downstream end of the water inlet valve 11. Figures 1 to 4

[0110] Through the arrangement, when the reverse osmosis membrane filter core 2 needs to be cleaned, the water in the water inlet main line 1 can be prevented from directly entering the reverse osmosis membrane filter core 2 by controlling the water inlet valve 11, so as to avoid diluting the cleaning liquid entering the reverse osmosis membrane filter core 2.

[0111] ​​It should be noted that in practical applications, the arrangement is not limited to placing the cleaning inlet 301 upstream of the water inlet valve 11 and the cleaning outlet 302 downstream of the water inlet valve 11. For example, both the cleaning inlet 301 and the cleaning outlet 302 can be placed upstream of the water inlet valve 11, or both can be placed downstream of the water inlet valve 11, and so on. Such adjustments and changes to the relative positions of the cleaning components and the water inlet valve 11 do not deviate from the principles and scope of this utility model and should be included within the protection scope of this utility model. Preferably, the cleaning inlet 301 is placed upstream of the water inlet valve 11, and the cleaning outlet 302 is placed downstream of the water inlet valve 11.

[0112] It should be noted that, in practical applications, those skilled in the art can place the booster pump 12 upstream of the inlet valve 11, or they can place the booster pump 12 downstream of the inlet valve 11, etc. Such adjustments and changes to the specific positions of the booster pump 12 and the inlet valve 11 do not deviate from the principle and scope of this utility model, and should all be included within the protection scope of this utility model.

[0113] Preferably, such as Figures 1 to 4 As shown, the booster pump 12 is located upstream of the inlet valve 11, and the cleaning inlet 301 is located between the booster pump 12 and the inlet valve 11.

[0114] By placing the booster pump 12 upstream of the inlet valve 11 and placing the cleaning inlet 301 between the booster pump 12 and the inlet valve 11, the cleaning inlet 301 can be located downstream of the booster pump 12. This facilitates the pumping of water from the main inlet channel 1 into the cleaning assembly and then into the reverse osmosis membrane filter element 2 via the booster pump 12, thereby improving cleaning efficiency and cleaning effect.

[0115] Preferably, such as Figures 1 to 4 As shown, the water purification equipment of this utility model also includes a pure water outlet pipe 5 and a pure water user component 51. The pure water end of the reverse osmosis membrane filter element 2 is connected to the pure water user component 51 through the pure water outlet pipe 5.

[0116] It should be noted that in actual application, the person skilled in the art can directly set the pure water water member 51 as a water outlet member (such as a faucet or a water outlet nozzle), and the filtered pure water flows out of the faucet or the water outlet nozzle for use by the user, or the pure water water member 51 can be set as a post-filter cartridge, and the filtered pure water flows into the post-filter cartridge to improve the taste for use by the user, or the pure water water member 51 can be set as a pure water tank, and the filtered pure water filtered by the reverse osmosis membrane filter cartridge 2 flows into the pure water tank for storage for use by the user, and the like, and such adjustment and change of the specific setting type of the pure water water member 51 does not deviate from the principles and scope of the present application, and should be included in the protection scope of the present application.

[0117] Preferably, the pure water water member 51 is a post-filter cartridge.

[0118] It should be noted that when the reverse osmosis membrane filter cartridge 2 is cleaned, a small amount of cleaning agent will penetrate through the membrane of the reverse osmosis membrane filter cartridge 2 to the pure water end, and therefore, after cleaning is completed, a small amount of cleaning agent will be left in the "first cup of water" of the pure water end of the reverse osmosis membrane filter cartridge 2, and in order to better achieve zero addition and zero pollution during the regeneration process of the reverse osmosis membrane filter cartridge 2, the pure water containing a small amount of cleaning agent in the "first cup of water" needs to be discharged before being used by the user.

[0119] The following will be described in combination with Figures 5 to 8 and the following two cases.

[0120] Case 1:

[0121] As shown in Figure 5 and Figure 6 , the water purification equipment further comprises a drain pipe 22 and a drain valve 221, one end of the drain pipe 22 is in communication with the pure water outlet pipe 5, the other end is in communication with the waste water outlet pipe 21, and the drain valve 221 is arranged on the drain pipe 22 and is used to control the opening and closing of the drain pipe 22.

[0122] Through such a setting, after the cleaning of the reverse osmosis membrane filter cartridge 2 is completed, the drain valve 221 is first opened, and the water at the pure water end of the reverse osmosis membrane filter cartridge 2 flows into the waste water outlet pipe 21 through the drain pipe 22, and when the pure water containing a small amount of cleaning agent at the pure water end of the reverse osmosis membrane filter cartridge 2 is completely discharged, the drain valve 221 is closed, and the water at the pure water end of the reverse osmosis membrane filter cartridge 2 flows into the pure water water member 51 through the pure water outlet pipe 5, so that the cleaning agent is more completely discharged, and thus more conducive to achieving zero addition and zero pollution during the regeneration process of the reverse osmosis membrane filter cartridge 2.

[0123] Case 2:

[0124] As shown in Figure 7 and Figure 8As shown, the water purification equipment also includes a return pipe 23 and a return valve 231. One end of the return pipe 23 is connected to the pure water outlet pipe 5, and the other end of the return pipe 23 is connected to the upstream end of the booster pump 12. The return valve 231 is installed on the return pipe 23 and is used to control the opening and closing of the return pipe 23.

[0125] With this setup, on the one hand, after cleaning the reverse osmosis membrane filter 2, the pure water containing a small amount of detergent at the pure water end of the reverse osmosis membrane filter 2 can be discharged to the upstream end of the booster pump 12 for further filtration through the reverse osmosis membrane filter 2 to allow the detergent to be discharged. On the other hand, when the water purification equipment is in normal water production mode and does not produce water for a long time, the reverse osmosis membrane filter 2 may experience an increase in the TDS value of the first cup of water. The "first cup of water" can also be returned to the upstream end of the booster pump 12 through the return pipe 23 to prevent users from drinking water with a high TDS value.

[0126] It should be noted that although a small amount of cleaning agent may seep into the pure water end of the reverse osmosis membrane filter 2 during the cleaning process, the amount of cleaning agent is small and the concentration is extremely low, so it will not affect the diaphragm of the booster pump 12. Therefore, the process of returning the pure water containing a small amount of cleaning agent from the pure water end of the reverse osmosis membrane filter 2 to the upstream end of the booster pump 12 through the return pipe 23, and then being transported by the booster pump 12 to the inlet end of the reverse osmosis membrane filter 2, will not corrode the diaphragm of the booster pump 12.

[0127] It should also be noted that although this utility model is described in the above two cases, it is not restrictive. For example, the other end of the drain pipe 22 can be directly connected to the drain pipe or the wastewater outlet of the water purification equipment, and the pure water containing detergent can be directly discharged to the drain pipe or the wastewater outlet of the water purification equipment.

[0128] Preferably, such as Figures 5 to 8 As shown, the water purification equipment of this utility model also includes a water quality detection component 52, wherein the water quality detection component 52 is used to detect the water quality information of the pure water end of the reverse osmosis membrane filter element 2.

[0129] By setting up the water quality detection component 52, the water quality information of the pure water end of the reverse osmosis membrane filter element 2 can be monitored in real time. When the water quality of the pure water end of the reverse osmosis membrane filter element 2 is detected to meet the standard, the pure water end of the reverse osmosis membrane filter element 2 is connected to the pure water use component 51 in a timely manner. This allows for accurate determination of whether the cleaning agent at the pure water end of the reverse osmosis membrane filter element 2 has been completely discharged, thereby saving water and extending the service life of the reverse osmosis membrane filter element 2.

[0130] It should be noted that the specific setting position of the water quality detection component 52 is not limited in the present application, for example, the water quality detection component 52 can be arranged on the pure water outlet pipe 5, or the water quality detection component 52 can be arranged on the drain pipe 22 or the backflow pipe 23, etc., and the adjustment and change of the specific setting position of the water quality detection component 52 do not deviate from the principles and scope of the present application, and should be included in the protection scope of the present application.

[0131] Preferably, as shown in the figure, the water quality detection component 52 is arranged on the pure water outlet pipe 5. Figures 5 to 8

[0132] It should be noted that in actual application, the water quality detection component 52 can be arranged as a TDS sensor, or the water quality detection component 52 can be arranged as a PH value sensor, or the water quality detection component 52 can be arranged as any other possible form, etc., and the adjustment and change of the specific setting type of the water quality detection component 52 do not deviate from the principles and scope of the present application, and should be included in the protection scope of the present application.

[0133] Exemplarily, the water quality detection component 52 is a TDS sensor.

[0134] So far, the technical scheme of the present application has been described in combination with the preferred embodiments shown in the figures, but the skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. The skilled in the art can make equivalent changes or replacements to the related technical features without deviating from the principles of the present application, and the technical scheme after the changes or replacements will fall within the protection scope of the present application.​

Claims

1. A water purification apparatus, characterized by comprising: The water purifying device comprises: a reverse osmosis membrane filter core; a water inlet main line which is in communication with a water inlet end of the reverse osmosis membrane filter core; a cleaning assembly which has a cleaning agent storage member and a cleaning outlet, the cleaning outlet being capable of being in communication with the water inlet end of the reverse osmosis membrane filter core so as to deliver cleaning liquid to the reverse osmosis membrane filter core; a booster pump which is arranged on the water inlet main line and at an upstream end of the cleaning outlet; a circulation pipe, a first end of the circulation pipe being in communication with a wastewater end of the reverse osmosis membrane filter core, a second end of the circulation pipe being in communication with the cleaning assembly so that the cleaning assembly, the water inlet end of the reverse osmosis membrane filter core and the wastewater end of the reverse osmosis membrane filter core are sequentially in communication to form a cleaning loop; and a circulation pump which is arranged on the cleaning loop and is used to circulate the cleaning liquid in the cleaning loop.

2. The water purification apparatus according to claim 1, characterized by The cleaning assembly further has a cleaning pipe line, two ends of the cleaning pipe line forming a cleaning inlet and a cleaning outlet respectively, the cleaning inlet being in communication with the water inlet main line so that water in the water inlet main line enters the cleaning agent storage member through the cleaning inlet to form cleaning liquid, the cleaning outlet being in communication with the water inlet main line so that the cleaning liquid is delivered into the reverse osmosis membrane filter core through the cleaning outlet, the second end of the circulation pipe being in communication with the cleaning pipe line.

3. The water purification apparatus according to claim 2, characterized by The cleaning assembly comprises a cleaning pipe line and a cleaning valve and a cleaning agent storage member which are sequentially arranged on the cleaning pipe line, the cleaning agent storage member being located at a downstream end of the cleaning valve and being used to store acidic cleaning agent or alkaline cleaning agent, the circulation pump being arranged on the cleaning pipe line; Alternatively, the cleaning assembly comprises a confluence pipe, at least two cleaning pipe lines which are arranged in parallel, a cleaning valve and a cleaning agent storage member which are arranged on each of the cleaning pipe lines, first ends of the cleaning pipe lines converging and forming the cleaning inlet, second ends of the cleaning pipe lines converging and being in communication with the confluence pipe, a terminal end of the confluence pipe forming the cleaning outlet, the cleaning agent storage member being located at a downstream end of the cleaning valve, the cleaning agent storage member on each of the cleaning pipe lines being used to store different types of cleaning agent, the circulation pump being arranged on the confluence pipe.

4. The water purification apparatus according to claim 3, characterized by The cleaning assembly further comprises a first one-way valve which is located between the cleaning outlet and the circulation pump and is capable of resisting water pressure in the water inlet main line; and / or, the cleaning assembly further comprises a second one-way valve which is arranged on at least part of the cleaning pipe line and is capable of preventing liquid in the confluence pipe from flowing reversely into the cleaning agent storage member.

5. The water purification apparatus according to claim 3, characterized by The cleaning assembly further comprises a shunt pipe and a control valve, a first end of the shunt pipe forming the cleaning inlet, first ends of the cleaning pipe lines converging and being in communication with a second end of the shunt pipe, the second end of the circulation pipe being in communication with the second end of the shunt pipe, the control valve being arranged on the shunt pipe and being used to control opening and closing of the shunt pipe.

6. The water purification apparatus according to claim 1, characterized by The water purifying device further comprises a wastewater outlet pipe and a wastewater valve which is arranged on the wastewater outlet pipe, The wastewater outlet pipe is communicated with the wastewater end of the reverse osmosis membrane filter core, the first end of the circulation pipe is communicated with the wastewater outlet pipe and is located at the upstream end of the wastewater valve; Alternatively, the wastewater end of the reverse osmosis membrane filter core is selectively communicated with the wastewater outlet pipe or the first end of the circulation pipe.

7. The water purification apparatus of claim 1, wherein The water purification device further comprises a pre-filter unit, the outlet end of the pre-filter unit is communicated with the water inlet main path, and the cleaning inlet is located at the downstream end of the pre-filter unit.

8. The water purification apparatus of claim 1, wherein The water purification device further comprises a water inlet valve arranged on the water inlet main path, 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.

9. The water purification apparatus according to any one of claims 1 to 8, characterized by, The water purification device further comprises a pure water outlet pipe and a pure water water member, the pure water end of the reverse osmosis membrane filter core is communicated with the pure water water member through the pure water outlet pipe.

10. The water purification apparatus according to claim 9, characterized by The water purification device further comprises a drain pipe and a drain valve, one end of the drain pipe is communicated with the pure water outlet pipe, the other end of the drain pipe is communicated with the wastewater outlet pipe, and the drain valve is arranged on the drain pipe and is used for controlling the opening and closing of the drain pipe. Alternatively, the water purification device comprises a backflow pipe and a backflow valve, one end of the backflow pipe is communicated with the pure water outlet pipe, the other end of the backflow pipe is communicated with the upstream end of the booster pump, and the backflow valve is arranged on the backflow pipe and is used for controlling the opening and closing of the backflow pipe.

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