Filter element cleaning system and purification device

Abstract

The utility model relates to a filter element cleaning system and a purification device, and relates to the technical field of water purification equipment. The filter element cleaning system comprises a purification liquid path, the purification liquid path comprises a water inlet section, a purification section and an outlet section which are sequentially communicated, a first filter element is arranged at the purification section, a waste water valve is installed on the first filter element, and a first valve body is arranged at the outlet section; the backflow flushing branch is connected with the purification section in parallel, a second valve body and a first check valve are arranged on the backflow flushing branch, and the first check valve is configured to enable liquid in the backflow flushing branch to flow towards the water inlet side of the purification section; and the chemical cleaning branch is connected with the purification section in parallel, a chemical cleaning assembly and a third valve body are arranged on the chemical cleaning branch, and the chemical cleaning assembly is used for adding a chemical cleaning agent into the chemical cleaning branch. According to the filter element cleaning device, the first filter element can be cleaned without dismounting the first filter element, cleaning is convenient, two cleaning modes of backflow cleaning and chemical cleaning can be achieved, and the cleaning effect is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to water purification equipment technical field, especially to a kind of filter cleaning system and purification device. BACKGROUND

[0002] With the increasing demand of people on the quality of drinking water, water purification device is more and more common in the application of resident family. The main component of water purification device is filter of water purification device, which filters the drinking water into water purification device, and retains or adsorbs impurities in drinking water to prevent impurities from flowing out of the water outlet of purification device. The filter will be blocked after long-term work, and the water purification function cannot be realized.

[0003] Therefore, the filter needs to be cleaned regularly to ensure the drinking water experience and water safety of users. In related technologies, the filter is cleaned by disassembling and cleaning the filter, and the cleaning process is relatively complex. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of filter cleaning system and purification device, for providing a kind of filter cleaning system of reducing cleaning difficulty.

[0005] In the first aspect, the utility model provides a kind of filter cleaning system, including purification liquid path, it includes the water inlet section, purification section and outlet section communicated in sequence, the first filter is arranged at the purification section, the first filter is equipped with waste water valve, the first valve body is arranged at the outlet section;

[0006] backwash branch, it is parallelly connected with the purification section, second valve body and first check valve are arranged on the backwash branch, the first check valve is configured so that the liquid in the backwash branch flows towards the water inlet side of the purification section;And

[0007] Chemical cleaning branch, it is parallelly connected with the purification section, and chemical cleaning assembly and third valve body are arranged on the chemical cleaning branch, and the chemical cleaning assembly is used to add chemical cleaning agent in the chemical cleaning branch.

[0008] In an embodiment, second check valve is further arranged on the chemical cleaning branch, and the second check valve is arranged on the opposite sides of the chemical cleaning assembly with the third valve body, and the second check valve is configured so that the liquid in the chemical cleaning branch flows towards the water inlet side of the purification section.

[0009] In an embodiment, the chemical cleaning assembly includes a housing, and the internal cavity of the housing is communicated with the pipeline of the chemical cleaning branch, and the housing is filled with chemical cleaning agent.

[0010] In one embodiment, the shell is provided with at least two chemical cleaning agents.

[0011] In one embodiment, the purification section is further provided with a flow detection unit, and the flow detection unit is arranged at the water outlet side of the first filter core.

[0012] The filter core cleaning system further comprises a controller, and the flow detection unit, the first valve body, the second valve body and the third valve body are electrically connected to the controller.

[0013] In one embodiment, the purification section is further provided with a pressure stabilizing pump, and the pressure stabilizing pump is arranged at the water inlet side of the first filter core.

[0014] In one embodiment, the purification section is further provided with a second filter core, and the second filter core is arranged between the first filter core and the outlet section.

[0015] In one embodiment, the water inlet section is provided with a third valve core.

[0016] In one embodiment, the first filter core is a reverse osmosis filter core.

[0017] In a second aspect, the utility model further provides a purification device, which comprises the filter core cleaning system.

[0018] Compared with the prior art, the utility model has the advantages that the backflow flushing branch, the chemical cleaning branch and the purification section of the purification liquid path are directly connected in parallel, the cleaning work of the first filter core can be carried out without dismounting the first filter core, and the cleaning is convenient. The backflow flushing branch can be used to realize the cycle flushing of the first filter core, and the chemical cleaning branch can be used to realize the chemical cleaning by adding the chemical cleaning agent to the first filter core. The cooperation of the two branches can realize the high-quality cleaning of the first filter core and prolong the service life of the filter core. BRIEF DESCRIPTION OF DRAWINGS

[0019] The utility model will be described in more detail below based on the embodiments and with reference to the drawings.

[0020] Figure 1 is the structure schematic view of the filter core cleaning system in the embodiment of the utility model;

[0021] Figure 2 is the flow chart of the filter core cleaning system in the embodiment of the utility model to complete one complete cleaning work;

[0022] Figure 3 is the liquid flow direction diagram of the filter core cleaning system in the embodiment of the utility model when filtering normally;

[0023] Figure 4The liquid flow chart of the filter core cleaning system in the embodiment of the utility model during positive flushing and concentration discharge;

[0024] Figure 5 The liquid flow chart of the filter core cleaning system in the embodiment of the utility model during positive flushing and concentration discharge;

[0025] Figure 6 The liquid flow chart of the filter core cleaning system in the embodiment of the utility model during positive flushing and concentration discharge;

[0026] Figure 7 The structure diagram of the chemical cleaning assembly in the embodiment of the utility model;

[0027] Figure 8 The structure diagram of the chemical cleaning assembly in the embodiment of the utility model.

[0028] Reference signs:

[0029] 100, purification liquid path;

[0030] 110, water inlet section; 111, third filter core; 112, third valve body;

[0031] 120, purification section; 121, first filter core; 122, flow detection unit; 123, constant pressure pump; 124, second filter core; 125, waste water valve;

[0032] 130, outlet section; 131, first valve body;

[0033] 200, back flushing branch; 210, second valve body; 220, first check valve;

[0034] 300, chemical cleaning branch; 310, chemical cleaning assembly; 320, third valve body; 330, second check valve; 340, chemical cleaning agent. DETAILED DESCRIPTION

[0035] The utility model will be further described below with reference to the drawings.

[0036] Referring to Figure 1 and Figure 2 , the first aspect provides a filter core cleaning system, which comprises a purification liquid path 100, a back flushing branch 200 and a chemical cleaning branch 300.

[0037] Referring to Figure 1 and Figure 3As shown, when the purified liquid path 100 does not need to be cleaned, the backwash branch 200 and the chemical cleaning branch 300 can be closed, the purified liquid path 100 is only communicated with the water supply pipeline, and the purification of the drinking water is realized through the purified liquid path 100, thereby improving the quality of the drinking water.

[0038] The purified liquid path 100 comprises a water inlet section 110, a purification section 120, and an outlet section 130. The first filter element 121 is arranged at the purification section 120, and the first filter element 121 can be used to purify and filter the drinking water flowing through the purification section 120. The first valve body 131 is arranged at the outlet section 130, and when the user needs to drink water, the purified drinking water can be guided out by opening the first valve body 131.

[0039] As shown in Figure 1 As shown, the backwash branch 200 is connected in parallel with the purification section 120. The second valve body 210 and the first check valve 220 are arranged on the backwash branch 200. The first check valve 220 is configured to make the liquid in the backwash branch 200 flow towards the water inlet side of the purification section 120 (the side of the purification section 120 connected with the water inlet section 110).

[0040] When the backwash branch 200 is not used to wash the first filter element 121, the second valve body 210 can be closed to prevent the drinking water in the purified liquid path 100 from flowing into the backwash branch 200.

[0041] As shown in Figure 1 , Figure 4 and Figure 5 As shown, when the backwash branch 200 is used to wash the first filter element 121, the first valve body 131 at the outlet section 130 can be closed, and the second valve body 210 of the backwash branch 200 can be opened. In this way, the water flowing out of the purification section 120 can only flow back to the water inlet side of the purification section 120 through the backwash branch 200.

[0042] At this time, the entire system can only discharge water at the water outlet of the waste water valve 125 of the first filter element 121. By continuously supplying water to the water inlet section 110, the continuous washing of the first filter element 121 can be realized, and the generated waste water can be discharged from the waste water valve 125 of the first filter element 121. That is, the backwash branch 200 can be used to realize the effect of the circulating washing of the purification section 120 (as shown in Figure 5 As shown), and the impurities attached to the first filter element 121 can be cleaned.

[0043] Since the purification section 120 is also connected in parallel with the chemical cleaning branch 300, the third valve body 320 is arranged on the chemical cleaning branch 300. When the chemical cleaning agent 340 is not needed to be added to the purification section 120, the third valve body 320 can be closed to avoid the chemical cleaning branch 300 being connected in communication with the purification section 120. When the chemical cleaning agent 340 is needed to be added to the purification section 120, the first valve body 131 can be closed and the third valve body 320 can be opened, so that the liquid flowing out of the purification section 120 can flow into the chemical cleaning branch 300, and the chemical cleaning agent 340 added in the chemical cleaning branch 300 is carried into the purification section 120 connected in parallel with the chemical cleaning branch 300 by the liquid, so that the first filter element 121 at the purification section 120 is soaked in the liquid containing the chemical cleaning agent 340, and the chemical cleaning of the first filter element 121 is realized. The liquid containing the chemical cleaning agent 340 can react with the impurities on the filter element to eliminate or separate the impurities, so as to achieve the effect of cleaning the impurities on the filter element.

[0044] That is, the filter element cleaning system provided by the present application can not only realize the flushing of the purification section 120 by using the backflow flushing branch 200, but also can add the chemical cleaning agent 340 to the purification section 120 by using the chemical cleaning branch 300, so as to realize the cleaning of the purification section 120 by using two cleaning methods. The quality of cleaning is improved, and the residual impurities on the first filter element 121 are reduced.

[0045] Since the forward flushing branch and the chemical cleaning branch 300 are connected in communication with the purification section 120 respectively, the first filter element 121 at the purification section 120 does not need to be removed from the purification section 120 when the purification section 120 is cleaned, and the cleaning process is simpler.

[0046] Participation Figure 1 And Figure 6 As shown in the figure, in some implementations, the chemical cleaning branch 300 is also provided with a second check valve 330, the second check valve 330 is arranged on the opposite sides of the third valve body 320 of the chemical cleaning assembly 310, and the second check valve 330 is configured to make the liquid of the chemical cleaning branch 300 flow towards the water inlet side of the purification section 120.

[0047] It can be understood that since the third valve body 320 and the second check valve 330 are arranged on the chemical cleaning branch 300, when the third valve body 320 is closed, the liquid can be prevented from flowing into the chemical cleaning branch 300, so that the leakage of the chemical cleaning agent 340 in the chemical cleaning branch 300 can be avoided.

[0048] See Figure 1As shown, in some implementations, the second check valve 330 is located on the side of the chemical cleaning branch 300 near the inlet section 110, while the third valve body 320 is located on the side of the chemical cleaning branch 300 near the outlet section 130.

[0049] It is understandable that in some other implementations, the second check valve 330 may be located on the side of the chemical cleaning branch 300 near the outlet section 130, while the third valve body 320 may be located on the side of the chemical cleaning branch 300 near the inlet section 110.

[0050] It should be noted that check valves, one-way valves, and non-return valves belong to the same valve body. This type of valve allows the medium to flow in only one direction and prevents flow in the opposite direction.

[0051] The following types of check valves are commonly used in the water supply sector:

[0052] 1. Spring-loaded type: Liquid flows from bottom to top, and the pressure pushes up the valve disc controlled by a spring. After the pressure is released, the spring force pushes the valve disc down, preventing backflow of liquid. Commonly used in check valves with small diameters.

[0053] 2. Gravity type: Similar to the spring type, it relies on the weight of the valve disc to close and prevent backflow.

[0054] 3. Swing type: The liquid flows directly through the valve body and relies on pressure to open the rotating valve disc on one side. After the pressure is lost, the valve disc returns to its original position by its own weight, and the reverse liquid pressure closes the valve disc.

[0055] 4. Plastic diaphragm type: Both the outer shell and the diaphragm are made of plastic. The outer shell is generally made of ABS, PE, PP, NYLON, or PC. The diaphragm is made of silicone resin, fluororesin, etc.

[0056] The first check valve and the second check valve 330 can be selected to be check valves of the same structure, such as both being spring-loaded or both being diaphragm-type check valves. Alternatively, the first check valve can be selected to be one of the two structures, while the second check valve 330 can be a different type of check valve, for example, the first check valve can be a spring-loaded check valve, while the second check valve 330 can be a swing check valve. The specific check valve selection can be determined according to the installation space and actual needs, and will not be subject to too many restrictions here.

[0057] See Figure 7 as well as Figure 8 As shown, in some implementations, the chemical cleaning assembly 310 includes a housing, the internal chamber of which is connected to the pipeline of the chemical cleaning branch 300, and the housing contains a chemical cleaning agent 340.

[0058] When chemical cleaning is needed for the first filter element 121, the first valve body 131 is closed, and the third valve body 320 is opened, so that the liquid flowing out of the purification section 120 is guided into the chemical cleaning branch 300, and the liquid flowing into the chemical cleaning branch 300 is guided into the shell to dissolve the chemical cleaning agent 340 in the shell. The dissolved chemical cleaning agent 340 is carried by the liquid to the purification section 120, thereby cleaning the first filter element 121 in the purification section 120.

[0059] It can be understood that the internal chamber of the shell can be arranged in a serpentine structure to prolong the residence time of the liquid in the internal chamber, improve the dissolution rate of the chemical cleaning agent 340 in the shell, and avoid the situation that the chemical cleaning effect is not ideal due to the low solubility of the chemical cleaning agent 340.

[0060] Alternatively, the shell is arranged as a box structure to reduce the difficulty of storing the chemical cleaning agent 340.

[0061] In some implementations, the chemical cleaning assembly 310 can be detachably arranged in the chemical cleaning branch 300. Before the purification section 120 needs to be cleaned, the third valve body 320 can be closed, and the chemical cleaning assembly 310 can be detached from the chemical cleaning branch 300. In this way, the corresponding chemical cleaning agent 340 can be added to the shell of the chemical cleaning assembly 310, and the content of the chemical cleaning agent 340 in the chemical cleaning assembly 310 can be ensured to meet the use requirements. After the chemical cleaning assembly is filled with the chemical cleaning agent 340, the chemical cleaning assembly 310 can be connected to the pipeline of the chemical cleaning branch 300, and then the third valve body 320 is opened, so that the liquid flowing into the chemical cleaning branch 300 can be guided into the chemical cleaning branch 300.

[0062] In some implementations, at least two chemical cleaning agents 340 are arranged in the shell. By arranging multiple chemical cleaning agents 340, different impurities can be chemically reacted, thereby eliminating or stripping different impurities in the first filter element 121. Compared with arranging only one kind of chemical cleaning agent 340 in the shell, more types of impurities can be cleaned.

[0063] In this way, the liquid in the shell can pass through different types of chemical cleaning in sequence, and the volume of different types of chemical cleaning agents 340 can be contained. For example, the flow direction of the liquid in the shell is from right to left, and the two chemical cleaning agents 340 in the shell can be arranged along the right-left direction.

[0064] In other implementations, the two chemical cleaning agents 340 in the shell can also be arranged along a direction perpendicular to the water flow direction, for example, Figure 1 and Figure 8The water flow direction at the middle shell is from right to left. The first chemical cleaning agent 340 can be arranged at the bottom of the shell, and the second chemical cleaning agent 340 can be arranged at the upper part of the shell.

[0065] It can be understood that the proportion of various chemical cleaning agents 340 in the shell can be controlled to adapt to different cleaning environments. For example, if the impurities in the filter element are mainly the first type of impurities, and the content of the second type of impurities is relatively small, and it is known that the first type of chemical cleaning agent 340 has better effect in cleaning the first type of impurities, and the second type of chemical cleaning agent 340 has better effect in cleaning the second type of impurities. By arranging more first type of cleaning agent in the shell, and arranging less second type of cleaning agent in the shell, the effect of cleaning the two types of impurities in the reaction filter element is better.

[0066] The chemical cleaning agent 340 is generally an acidic cleaning agent or an alkaline cleaning agent. The acidic cleaning agent includes citric acid, phosphoric acid, oxalic acid, nitric acid, and phosphoric acid. The alkaline cleaning agent includes sodium bicarbonate, sodium carbonate, sodium hydroxide, and potassium hydroxide.

[0067] In order to avoid the reaction between the acidic cleaning agent and the alkaline cleaning agent, in some implementations, a cleaning agent selection device can also be arranged at the chemical cleaning assembly 310. The chemical cleaning agent 340 is guided to the water purification section one by one according to the type of the chemical cleaning agent 340, so as to avoid adding acidic cleaning agent and alkaline cleaning agent to the liquid at the same time, and reduce the cleaning effect of the cleaning agent.

[0068] Specifically, two parallel shells can be arranged at the chemical cleaning assembly 310. One of the shells is used to load the acidic cleaning agent, and the other shell is used to load the alkaline cleaning agent. An annular valve is arranged at the communication position between the shell and the pipeline, and the annular valve is used as a cleaning agent selection device. When the annular valve is switched to communicate the pipeline with the shell loaded with the acidic cleaning agent, it is equivalent to selecting the current chemical cleaning agent 340 as the acidic cleaning agent. The alkaline impurities in the filter element can be decomposed or peeled off by the acidic cleaning agent, so as to avoid the influence of the alkaline cleaning agent on the cleaning effect of the acidic cleaning agent. When the annular valve is switched to communicate the pipeline with the shell loaded with the alkaline cleaning agent, it is equivalent to selecting the current chemical cleaning agent 340 as the alkaline cleaning agent. The decomposition or peeling of the acidic impurities in the filter element by the alkaline cleaning agent is avoided, and the cleaning effect of the alkaline cleaning agent is reduced by dissolving the acidic cleaning agent in the water.

[0069] It can be understood that the cleaning agent selection device is not limited to the structure of the annular valve, and can also be designed as a mechanical mechanism. Different cleaning agents are put into the pipeline by grabbing, so as to avoid the reduction of the cleaning effect of the cleaning agent by dissolving the acidic cleaning agent and the alkaline cleaning agent in the liquid at the same time.

[0070] It should be noted that the physical state of the cleaning agent is not particularly limited, and the chemical cleaning agent 340 can be a solid block structure, a spherical structure, or a powdery structure. The chemical cleaning agent 340 can also be a liquid structure.

[0071] Referring to Figure 1 As shown in some implementations, the purification section 120 is also provided with a flow detection unit 122, and the flow detection unit 122 is arranged on the water outlet side of the first filter element 121. The filter element cleaning system also includes a controller, and the flow detection unit 122, the first valve body 131, the second valve body 210, and the third valve body 320 are electrically connected to the controller.

[0072] That is, the control of the three valve bodies can be realized by the controller.

[0073] In some implementations, the filter element cleaning system also includes a storage medium, and the storage medium stores a cleaning program. The storage medium is electrically connected to the controller, so that the controller can execute the cleaning program stored on the storage medium. Thus, one-key cleaning work can be realized.

[0074] The cleaning program stored in the storage medium includes a forward flushing and concentration removal process, a chemical cleaning process, an immersion process, and a forward flushing and circulation process.

[0075] In the forward flushing and concentration removal process, the controller controls the first valve body 131, the third valve body 320, and the second valve body 210 to be closed, and opens the fourth valve body 112 of the water inlet section 110 by using the controller, so that the water supply pipeline supplies water to the water inlet section 110. After the water flows through the purification section 120 of the purification liquid path 100, the first filter element 121 at the purification section 120 is washed and concentrated, and the waste water is discharged through the waste water valve 125 installed at the first filter element 121.

[0076] In the chemical cleaning process, the controller controls the first valve body 131 and the second valve body 210 to be closed, and controls the third valve body 320 to be opened. The fourth valve body 112 of the water inlet section 110 is opened by using the controller, so that the water supply pipeline supplies water to the water inlet section 110. After the water flows through the purification section 120 of the purification liquid path 100, the water flows to the purification section 120 again through the chemical cleaning branch 300, and the chemical cleaning assembly 310 is arranged in the chemical cleaning branch 300. The chemical cleaning assembly 310 can be used to add chemical cleaning agent 340 to the water, so as to realize chemical cleaning of the first filter element 121 at the purification section 120.

[0077] In the immersion process, the controller controls the first valve body 131, the second valve body 210, the waste water valve 125, and the third valve body 320 to be closed. After the water supply pipeline supplies water to the purification liquid path 100 and stops supplying water by using the controller, the first filter element 121 is immersed in the liquid.

[0078] When the positive flushing cycle process is performed, the controller controls the first valve body 131 and the third valve body 320 to be closed, and controls the second valve body 210 to be opened, and then controls the fourth valve body 112 of the water inlet section 110 to be opened, so that the water supply pipeline supplies water to the water inlet section 110, and the water flow is partially directly discharged from the waste water valve 125, and the other part of the water flow is filtered by the first filter element 121 and then flows into the backwash flushing branch 200 and enters the first filter element 121 again, so as to realize multiple flushing of the first filter element 121 with a low water flow.

[0079] In order to realize the organic combination of the cleaning programs, the controller can be used to set the running time of each process.

[0080] Referring to FIGS. 1, 2 and 3, the cleaning process of the first filter element 121 is as follows. Figure 1 and Figure 2 (1) first, the controller is used to control the positive flushing and concentration discharging process for 1 minute;

[0081] (2) then, the first cycle process is performed for 1 time, wherein the first cycle process includes the positive flushing cycle process for 1 minute, the chemical flushing process for 1 minute and the positive flushing and concentration discharging process for 1 minute, which are sequentially performed.

[0082] (3) then, the soaking process is performed for 1 hour.

[0083] (4) then, the above three steps (1), (2) and (3) are cycled for 1 time to complete the cleaning work after installation.

[0084] In other implementations, the cleaning instruction can be generated when the flow detection unit 122 detects that the flow is lower than the preset flow. At this time, it indicates that there are too many impurities in the first filter element 121, which causes the flow to decrease.

[0085] After the controller receives the cleaning instruction from the flow meter, the above steps can be automatically carried out, and the control implementation steps (1), (2), (3) and (4) are completed to clean the first filter element 121.

[0086] The types of flow meters are various, which can be generally divided into the following categories: differential pressure flow meter, rotor flow meter, throttling flow meter, slit flow meter, volumetric flow meter, electromagnetic flow meter and ultrasonic flow meter. The appropriate flow meter can be selected according to the installation environment and the flow measurement range.

[0087] Referring to FIGS. 1, 2 and 3, the cleaning process of the first filter element 121 is as follows. Figure 1 and Figure 3 In some implementations, the purification section 120 is further provided with a pressure stabilizing pump 123, and the pressure stabilizing pump 123 is arranged on the water inlet side of the first filter element 121.

[0088] By setting the pressure stabilizing pump 123, the water pressure at the purification section 120 can be kept stable, so as to avoid the filtration performance of the first filter element 121 from being reduced due to water pressure fluctuation.

[0089] Referring to Figure 1 As shown in the figure, in some implementations, the purification section 120 is further provided with a second filter element 124, and the second filter element 124 is located between the first filter element 121 and the outlet section 130. That is, two filter elements are arranged on the purification section 120, which can realize double filtration of the drinking water, and further improve the quality of the drinking water.

[0090] Referring to Figure 1 As shown in the figure, in some implementations, the flow meter is arranged between the first filter element 121 and the second filter element 124. Compared with arranging the flow meter on the side of the second filter element 124 away from the first filter element 121, the flow meter arranged at the first filter element 121 and the second filter element 124 can more accurately measure the fluid flow data flowing out of the first filter element 121, so as to timely detect whether the first filter element 121 needs to be cleaned.

[0091] Referring to Figure 1 As shown in the figure, in some implementations, the third filter element 111 is arranged at the water inlet section 110. The third filter element 111 at the water inlet section 110 can realize preliminary filtration of the drinking water, so as to remove impurities flowing to the first filter element 121. In the figure, the purification liquid path 100 is provided with the first filter element 121, the second filter element 124 and the third filter element 111. The impurities in the water can be sufficiently removed, and the safety of the drinking water can be ensured.

[0092] It can be understood that in other implementations, the number of filter elements in the purification liquid path 100 can be further increased, so as to further improve the filtration capacity of the purification liquid path 100 and ensure the filtration effect.

[0093] In some implementations, the first filter element 121 adopts a reverse osmosis membrane filter element. Compared with conventional filter elements, the reverse osmosis membrane filter element has the characteristics of high filtration precision, good filtration effect and long service life.

[0094] Generally, the filtration precision of the reverse osmosis membrane filter element is as high as 0.0001 microns, which can filter out harmful substances such as bacteria, viruses, heavy metals and organic matter in the water, so as to make the water quality more pure. Moreover, the turbidity, odor and color of the water can be effectively removed, and the taste and quality of the water can be improved.

[0095] It can be understood that the second filter element 124 can also adopt a reverse osmosis membrane filter element with excellent filtration effect, so as to further improve the purification capacity of the purification section 120.

[0096] In other implementations, the first filter element 121 can also be selected from other types of filter elements, such as a RO membrane filter element. The RO membrane filter element has a high filtering accuracy, and only water molecules can pass through the RO membrane holes, so that the water obtained by passing through the RO membrane filter element is pure water.

[0097] Alternatively, the first filter element 121 can also be an ultrafiltration membrane filter element. The ultrafiltration membrane filter element can well filter heavy metals, bacteria, viruses, and silt and rust in water.

[0098] Alternatively, the first filter element 121 can also be a ceramic filter element. Compared with the above two filter elements, the ceramic filter element has a lower filtering accuracy, and can remove impurities such as rust, silt, and red worms.

[0099] In order to fully exert the filtering capabilities of the first filter element 121, the second filter element 124, and the third filter element 111, the three filter elements can be arranged in order of filtering capability. The filter element with the weakest filtering capability among the three filter elements is set as the third filter element 111 to complete the preliminary filtration of the drinking water and filter out large-particle impurities in the drinking water. The filter element with the strongest filtering capability among the three filter elements is set as the first filter element 121 to complete the re-filtration of the drinking water after the preliminary filtration and filter out fine-particle impurities in the drinking water. The second filter element 124 with a slightly weaker filtering capability than the first filter element 121 is arranged at the rear side of the first filter element 121 to ensure the filtering effect and prevent the first filter element 121 from being damaged and failing to achieve the expected purification effect.

[0100] In a second aspect, the utility model also provides a purification device which comprises any one of the filter element cleaning systems provided in the first aspect.

[0101] Since the purification device is internally integrated with the filter element cleaning system which can realize the cleaning of the filter element, the first filter element 121 at the purification section 120 does not need to be disassembled for cleaning, and the relevant cleaning work can be completed. The cleaning is more convenient and fast.

[0102] Moreover, since the filter element cleaning system comprises two cleaning branches, i.e., the backflow flushing branch 200 and the chemical cleaning branch 300, which are parallel to the purification section 120, two different cleaning modes can be realized to ensure the cleaning effect of the first filter element 121.

[0103] Moreover, the cleaning sequence of each cleaning branch can be flexibly adjusted by controlling the opening and closing of each valve body, so that a complex cleaning process can be realized to fully clean the first filter element 121.

[0104] Although the utility model has been described with reference to the preferred embodiments, various modifications can be made to it without departing from the scope of the utility model and equivalent replacements can be made to the components therein. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A filter cartridge cleaning system characterized by, It comprises: a purification liquid path comprising a water inlet section, a purification section and an outlet section connected in sequence, a first filter element is arranged at the purification section, a wastewater valve is installed on the first filter element, and a first valve body is arranged at the outlet section; a backwash branch parallel to the purification section, a second valve body and a first check valve are arranged on the backwash branch, and the first check valve is configured to make the liquid in the backwash branch flow towards the water inlet side of the purification section; and a chemical cleaning branch parallel to the purification section, and a chemical cleaning assembly and a third valve body are arranged on the chemical cleaning branch, and the chemical cleaning assembly is used to add a chemical cleaning agent to the chemical cleaning branch.

2. The filter element cleaning system according to claim 1, wherein a second check valve is further arranged on the chemical cleaning branch, the second check valve and the third valve body are arranged on opposite sides of the chemical cleaning assembly, and the second check valve is configured to make the liquid in the chemical cleaning branch flow towards the water inlet side of the purification section.

3. The filter element cleaning system according to claim 1, wherein the chemical cleaning assembly comprises a shell, an inner cavity of the shell is in communication with a pipeline of the chemical cleaning branch, and the shell contains a chemical cleaning agent.

4. The filter element cleaning system according to claim 3, wherein the shell contains at least two chemical cleaning agents.

5. The filter element cleaning system according to claim 1, wherein the purification section further comprises a flow detection unit, and the flow detection unit is arranged on the water outlet side of the first filter element; the filter element cleaning system further comprises a controller, and the flow detection unit, the first valve body, the second valve body and the third valve body are electrically connected to the controller.

6. The filter element cleaning system according to any one of claims 1-5, wherein the purification section further comprises a pressure stabilizing pump, and the pressure stabilizing pump is arranged on the water inlet side of the first filter element.

7. The filter element cleaning system according to any one of claims 1-5, wherein the purification section further comprises a second filter element, and the second filter element is located between the first filter element and the outlet section.

8. The filter element cleaning system according to any one of claims 1-5, wherein a third valve element is arranged at the water inlet section.

9. The filter element cleaning system according to any one of claims 1-5, wherein the first filter element is a reverse osmosis filter element. It comprises:

10. A purification device, characterized by the filter element cleaning system according to any one of claims 1-9. ​

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