Filtering device and water purifier comprising same

Abstract

The utility model provides a filtering device and a water purifier including the same, wherein the filtering device comprises a rough filtration filter element, an RO / NF filter element, a storage assembly and a softening assembly, the water inlet end of the rough filtration filter element is communicated with a water source, the water outlet end of the rough filtration filter element is communicated with the water inlet end of the RO / NF filter element, the water outlet end of the RO / NF filter element is respectively communicated with the storage assembly and a first user side, and the softening assembly is communicated with the storage assembly. The storage assembly is used for storing wastewater generated after filtration of the RO / NF filter element, the water inlet end of the softening assembly is communicated with the water outlet end of the storage assembly, the softening assembly is used for softening the wastewater, and the water outlet end of the softening assembly is communicated with a second user side; wherein the rough filtration filter element comprises a polypropylene melt-blown filter element. Large-particle impurities and suspended solids in water can be removed through the rough filtration filter element. And the water subjected to rough filtration treatment flows into the RO / NF filter element to ensure that the effluent quality reaches a high standard. After wastewater generated in the filtering process of the RO / NF filter element is treated by the softening assembly, the water quality is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of water purification, in particular to a filter device and water purifier containing it. BACKGROUND

[0002] With the continuous improvement of health consciousness and the increasingly prominent water quality problem, water purifiers have become an indispensable household appliance in modern families. They not only occupy a place in the kitchen, but also become more and more common in offices, schools and public places. Water purifiers can ensure that every drop of water we drink is pure and safe with their ability to efficiently remove impurities, bacteria and heavy metals in water. With the progress of technology, water purifiers have become more intelligent and convenient, and can automatically adjust the filtering program according to water quality and usage habits to meet the needs of different groups of people.

[0003] However, the waste water after the filter core of the water purifier filters is usually directly discharged, causing waste of water resources. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problem that the waste water produced after the water purifier filters is directly discharged in the prior art, and provides a filter device and a water purifier containing the same.

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

[0006] The utility model discloses a filter device, the filter device includes rough filter core, RO / NF filter core, storage component and softening component, the water inlet end of rough filter core is linked with water source, the water outlet end of rough filter core is linked with the water inlet end of RO / NF filter core, the water outlet end of RO / NF filter core is linked with storage component and first user end respectively, the storage component is used to store the waste water produced after RO / NF filter core filters, the water inlet end of softening component is linked with the water outlet end of storage component, the softening component is used to soften waste water, the water outlet end of softening component is linked with second user end,

[0007] Among them, the rough filter core includes polypropylene melt-blown filter core.

[0008] In the scheme, the above structure is adopted, and the coarse filter core can remove large-particle impurities and suspended solids in the water quality. The water treated by the coarse filter flows into the RO / NF filter core, and the reverse osmosis or nanofiltration technology can be used to further remove the dissolved solids, microorganisms and other harmful substances in the water, so as to ensure that the water quality meets high standards. The filtered water can be supplied to the first user end to meet the needs of drinking or cooking. At the same time, the wastewater generated by the RO / NF filter core in the filtering process is collected by the storage assembly, and after being treated by the softening assembly, the hardness is effectively reduced, the water quality is improved, and the water quality meets the use requirements of the second user end, so that the recycling and saving of water resources are realized. In addition, the polypropylene melt-blown filter core can not only play a coarse filtering role, but also retain the residual chlorine in the municipal tap water, so that the residual chlorine can appropriately improve the bacterial growth of the soft water at the rear end, and has the effect of delaying the odor of dead water.

[0009] Preferably, the softening assembly comprises a resin tank and a salt tank, the two ends of the resin tank are respectively connected with the storage assembly and the second user end, and the salt tank is connected with the resin tank for regenerating the resin in the resin tank.

[0010] In the scheme, the above structure is adopted, and the resin tank is the core of the softening process. By ion exchange, the calcium and magnesium ions (i.e. hardness ions) in the water are replaced by sodium ions, so that the hardness of the water can be reduced, thereby preventing the scaling problem in the pipeline and equipment, prolonging the service life of the equipment, and improving the taste and use effect of the water. When the resin adsorbs a certain amount of hardness ions, it needs to be regenerated to restore its exchange capacity. At this time, the brine in the salt tank is used to flush the resin layer, and the sodium ions in the brine replace the hardness ions on the resin, which are discharged out of the tank with the regenerated wastewater, so that the resin restores the softening exchange capacity, ensuring the continuous operation of the resin tank and reducing the use cost. In addition, the softened water is more suitable for daily life water such as washing and bathing, and the user's experience is improved.

[0011] Preferably, the storage assembly comprises a storage tank, a first detection member and a second detection member, the storage tank is connected with the water inlet end of the softening assembly for storing the wastewater generated after the RO / NF filter core is filtered, the first detection member is used to detect whether the second user end is opened, and the second detection member is used to detect the water level in the storage tank and control whether the water outlet end of the storage assembly is connected with the softening assembly according to the water level.

[0012] In the present scheme, the storage tank is used to store the filtered wastewater, ensuring the self-storage of wastewater resources, and providing water resources for subsequent softening treatment. The first detection member is used to detect the use state of the second user end, and by detecting whether the user opens the second water end, it is determined whether the softened water needs to be supplied to the user. The second detection member is used to detect the water level in the storage tank, so that the water level can represent whether the storage tank stores wastewater. When the storage tank stores wastewater, the storage assembly and the softening assembly are connected.

[0013] Preferably, the storage assembly further comprises a motor pump, which is used to extract water in the storage tank into the softening assembly.

[0014] In the present scheme, the above structure is used, and the motor pump improves the efficiency of the transfer of wastewater from the storage tank to the softening assembly, improving the efficiency of the wastewater treatment process.

[0015] Preferably, the filter device further comprises a first one-way valve, and the water outlet end of the RO / NF filter core is connected with the storage assembly through a connecting pipe, and the first one-way valve is arranged on the connecting pipe and is connected in the direction from the water outlet end of the RO / NF filter core to the storage assembly.

[0016] In the present scheme, the above structure is used, and the first one-way valve ensures the unidirectionality of water flow and the stability of the system. The first one-way valve is installed on the connecting pipe, which can prevent water from flowing back to the RO / NF filter core from the storage assembly, thereby preventing the phenomenon of water backflow due to pressure and the like, protecting the RO / NF filter core from the impact of reverse water flow, and prolonging the service life of the RO / NF filter core.

[0017] Preferably, the filter device further comprises a pre-filter core, which is arranged between the coarse filter core and the RO / NF filter core and is connected with the coarse filter core and the RO / NF filter core, respectively, and the pre-filter core is used to remove chlorine in water.

[0018] In the present scheme, chlorine is a common disinfectant in tap water, but long-term contact may have adverse effects on human health and cause damage to the subsequent RO / NF filter core. The above structure is used, and through the filtration of the pre-filter core, the chlorine in the water is effectively removed, which not only protects the RO / NF filter core and prolongs its service life, but also avoids secondary pollution of chlorine to water quality, ensuring the purity and safety of the final water. In addition, the addition of the pre-filter core also helps to reduce the filtration burden of the RO / NF filter core.

[0019] Preferably, the pre-filter core comprises activated carbon.

[0020] In the scheme, the activated carbon has strong adsorption capacity due to its highly developed pore structure and large specific surface area, so that the residual chlorine in water can be effectively adsorbed, the color and odor of water can be removed, and the odor and color of water can be significantly improved, so that the water is clearer and odorless.

[0021] Preferably, the filter device further comprises a post-filter cartridge and a sterilization assembly, and the RO / NF filter cartridge is sequentially connected in communication with the first user end through the post-filter cartridge and the sterilization assembly.

[0022] In the scheme, the post-filter cartridge is used after the RO / NF filter cartridge to further remove volatile organic compounds, residual chlorine, odor and colorants that may be left in the water, and improve the taste and purity of the water quality.

[0023] Preferably, the first user end comprises a normal-temperature water user end and a hot water user end, the sterilization assembly is directly connected in communication with the normal-temperature water user end, and the sterilization assembly is connected in communication with the hot water user end through a heating assembly.

[0024] In the scheme, the above structure is adopted, so that the user can choose normal-temperature water or hot water according to actual needs.

[0025] The utility model discloses a kind of water purifiers, and the water purifier includes the filter device as any one of the above.

[0026] In the scheme, the filter device is applied to the water purifier, so that the large-particle impurities and suspended solids in the water quality can be removed by the coarse filter cartridge. The water treated by the coarse filter flows into the RO / NF filter cartridge, and the dissolved solids, microorganisms and other harmful substances in the water can be further removed by using reverse osmosis or nanofiltration technology, to ensure that the water quality meets high standards. The filtered water can be supplied to the first user end to meet the needs of drinking or cooking. At the same time, the wastewater generated during the filtration process of the RO / NF filter cartridge is collected by the storage assembly, and after being treated by the softening assembly, the hardness can be effectively reduced, the water quality can be improved, and the water quality can meet the use requirements of the second user end, so that the recycling and conservation of water resources are realized. In addition, the polypropylene melt-blown filter cartridge can not only play the role of coarse filtration, but also retain the residual chlorine of municipal tap water, so that the growth of bacterial colonies in the soft water at the back end can be appropriately improved by the residual chlorine, and the effect of delaying the odor of dead water can be achieved.

[0027] The positive progress effect of the utility model is that:

[0028] The large-particle impurities and suspended matters in the water quality can be removed through the coarse filter element. The water treated by the coarse filter flows into the RO / NF filter element, and the dissolved solids, microorganisms and other harmful substances in the water can be further removed by using the reverse osmosis or nanofiltration technology, so that the water quality can meet the high standard. The filtered water can be supplied to the first user end to meet the needs of drinking or cooking. Meanwhile, the wastewater generated in the filtering process of the RO / NF filter element is collected by the storage assembly, and after being treated by the softening assembly, the hardness of the wastewater can be effectively reduced, and the water quality can be improved, so that the water quality meets the use requirements of the second user end, thereby realizing the recycling and saving of water resources. In addition, the polypropylene melt-blown filter element can not only play the role of coarse filtration, but also can retain the residual chlorine in the municipal tap water, so that the growth of colonies in the soft water at the rear end can be appropriately improved by the residual chlorine, and the effect of delaying the odor of dead water can be achieved. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a schematic view of the filtering device of the utility model embodiment.

[0030] BRIEF DESCRIPTION OF DRAWINGS

[0031] Filtering device 100

[0032] Coarse filter element 1

[0033] RO / NF filter element 2

[0034] Storage assembly 3

[0035] Storage tank 31

[0036] First detection piece 32

[0037] Second detection piece 33

[0038] Motor pump 34

[0039] Softening assembly 4

[0040] Resin tank 41

[0041] Salt tank 42

[0042] First user end 5

[0043] Cold water user end 51

[0044] Hot water user end 52

[0045] Cold water drain valve 53

[0046] Hot water drain valve 54

[0047] Second user end 6

[0048] First one-way valve 7

[0049] Connecting pipe 8

[0050] Pre-filter 9

[0051] Post-filter 10

[0052] Sterilization assembly 11

[0053] Booster pump 12

[0054] Second one-way valve 13

[0055] Third one-way valve 14

[0056] Concentrated water valve 15

[0057] Drain passage 16

[0058] Fourth one-way valve 17

[0059] Multi-way water control valve 18

[0060] Water valve assembly 19

[0061] Flow meter 20

[0062] Pump body 21

[0063] Heating body 22

[0064] Purification module water inlet valve 23 DETAILED DESCRIPTION

[0065] The utility model will be described in detail below with a preferred embodiment and in connection with the drawings.

[0066] As Figure 1As shown, the embodiment provides a filtering device 100, which comprises a coarse filter cartridge 1, an RO / NF filter cartridge 2, a storage assembly 3 and a softening assembly 4. The water inlet end of the coarse filter cartridge 1 is connected with a water source, and the water outlet end of the coarse filter cartridge 1 is connected with the water inlet end of the RO / NF filter cartridge 2. The water outlet end of the RO / NF filter cartridge 2 is connected with the storage assembly 3 and a first user end 5 respectively. The storage assembly 3 is used for storing the wastewater generated after the RO / NF filter cartridge 2 filtering. The water inlet end of the softening assembly 4 is connected with the water outlet end of the storage assembly 3, and the softening assembly 4 is used for softening the wastewater. The water outlet end of the softening assembly 4 is connected with a second user end 6. The coarse filter cartridge 1 comprises a polypropylene melt-blown filter cartridge. With the above structure, the coarse filter cartridge 1 can remove the large-particle impurities and suspended solids in the water. The water treated by the coarse filter flows into the RO / NF filter cartridge 2, and the reverse osmosis or nanofiltration technology can be used to further remove the dissolved solids, microorganisms and other harmful substances in the water, so as to ensure that the water quality reaches a high standard. The filtered water can be supplied to the first user end 5 to meet the needs of drinking or cooking. At the same time, the wastewater generated by the RO / NF filter cartridge 2 in the filtering process is collected by the storage assembly 3, and after being treated by the softening assembly 4, the hardness of the wastewater can be effectively reduced, the water quality can be improved, and the water quality can meet the use requirements of the second user end 6, so that the recycling and saving of water resources are realized. In addition, the polypropylene melt-blown filter cartridge can not only play a role in coarse filtration, but also can retain the residual chlorine in the municipal tap water, so that the growth of bacteria in the soft water at the back end can be appropriately improved, and the effect of delaying the odor of dead water can be achieved.

[0067] In the embodiment, the water source is tap water, and in other embodiments, the water source can also be in other forms, which are not limited herein.

[0068] As shown, Figure 1 The softening assembly 4 comprises a resin tank 41 and a salt tank 42. The two ends of the resin tank 41 are connected with the storage assembly 3 and the second user end 6 respectively, and the salt tank 42 is connected with the resin tank 41 and is used for regenerating the resin in the resin tank 41. With the above structure, the resin tank 41 is the core of the softening process. By means of ion exchange, the calcium and magnesium ions (i.e. hardness ions) in the water are replaced by sodium ions, so that the hardness of the water can be reduced, the scaling problem in the pipeline and equipment can be prevented, the service life of the equipment can be prolonged, and the taste and use effect of the water can be improved. When the resin adsorbs a certain amount of hardness ions, the resin needs to be regenerated to restore its exchange capacity. At this time, the brine in the salt tank 42 is used to flush the resin layer, and the sodium ions in the brine replace the hardness ions on the resin, which are discharged out of the tank with the regenerated wastewater, so that the resin restores the softening exchange capacity, ensuring the continuous operation of the resin tank 41 and reducing the use cost. In addition, the water quality after softening is more suitable for daily life water such as washing and bathing, and the user's use experience is improved.

[0069] AsFigure 1 As shown, the storage component 3 includes a storage tank 31, a first detection element 32, and a second detection element 33. The storage tank 31 is connected to the inlet of the softening component 4 and is used to store the wastewater produced after filtration by the RO / NF filter element 2. The first detection element 32 is used to detect whether the second user terminal 6 is open, and the second detection element 33 is used to detect the water level in the storage tank 31 and control whether the outlet of the storage component 3 is connected to the softening component 4 based on the water level. With this structure, the storage tank 31 stores the wastewater produced after filtration, ensuring the timely storage of wastewater resources and providing water resources for subsequent softening treatment. The first detection element 32 detects the usage status of the second user terminal 6, determining whether softened water needs to be supplied to the user by detecting whether the user has opened the second water terminal. The second detection element 33 detects the water level in the storage tank 31, thus indicating whether wastewater is stored in the storage tank 31. When wastewater is stored in the storage tank 31, the storage component 3 is connected to the softening component 4.

[0070] It should be specifically noted that the first detection element 32 can determine whether the second user terminal 6 is open based on whether the pressure at the second user terminal 6 is released. When the first detection element 32 detects pressure release (i.e., the user is using softened water), and the second detection element 33 indicates that there is water in the storage tank 31, then the storage tank 31 is connected to the softening component 4. The water source is connected to the resin tank 41 through the coarse filter element 1. In other words, the outlet of the coarse filter element 1 is connected to both the resin tank 41 and the pre-filter element 9. In actual use, the wastewater stored in the storage tank 31 may not meet the water demand of the second user terminal 6. Therefore, water is supplied to the softening component 4 simultaneously through the storage tank 31 and the water source, and the softening component 4 softens the water to meet the user's needs.

[0071] In this embodiment, the first detection element 32 is a high-pressure switch, and the second detection element 33 is a liquid level switch.

[0072] like Figure 1 As shown, the storage component 3 also includes a motor pump 34, which is used to pump water from the storage tank 31 into the softening component 4. By adopting the above structural configuration, the efficiency of transferring wastewater from the storage tank 31 to the softening component 4 is improved by using the motor pump 34, thereby increasing the efficiency of the wastewater treatment process.

[0073] like Figure 1As shown, the filtering device 100 further comprises a first one-way valve 7, the water outlet end of the RO / NF filter core 2 is communicated with the storage assembly 3 through a connecting pipe 8, the first one-way valve 7 is arranged on the connecting pipe 8 and is communicated from the water outlet end of the RO / NF filter core 2 to the storage assembly 3. By adopting the above structure, the one-way flow of water and the stability of the system are ensured through the first one-way valve 7. The first one-way valve 7 is installed on the connecting pipe 8, which can prevent the water from flowing back to the RO / NF filter core 2 from the storage assembly 3, thereby preventing the phenomenon of water backflow due to pressure and the like, protecting the RO / NF filter core 2 from the impact of reverse water flow, and prolonging the service life of the RO / NF filter core 2.

[0074] As shown in the drawings, Figure 1 As shown, the filtering device 100 further comprises a pre-filter core 9, the pre-filter core 9 is arranged between the coarse filter core 1 and the RO / NF filter core 2, and the pre-filter core 9 is communicated with the coarse filter core 1 and the RO / NF filter core 2 respectively. The pre-filter core 9 is used to remove chlorine in water. Chlorine is a common disinfectant in tap water, but long-term contact may have adverse effects on human health and cause damage to the subsequent RO / NF filter core 2. By adopting the above structure, through the filtration of the pre-filter core 9, the chlorine in the water is effectively removed, which not only protects the RO / NF filter core 2 and prolongs its service life, but also avoids secondary pollution of chlorine to water quality, ensuring the purity and safety of the final water. In addition, the addition of the pre-filter core 9 also helps to reduce the filtering burden of the RO / NF filter core 2.

[0075] In this embodiment, the pre-filter core 9 comprises activated carbon. Specifically, the activated carbon has a highly developed pore structure and a large specific surface area, so it has strong adsorption capacity, thereby being able to effectively adsorb residual chlorine in water, remove color and odor in water, and significantly improve the odor and color of water, making it clearer and odorless.

[0076] As shown in the drawings, Figure 1 As shown, the filtering device 100 further comprises a post-filter core 10 and a sterilization assembly 11, the RO / NF filter core 2 is communicated with the first user end 5 through the post-filter core 10 and the sterilization assembly 11 in sequence. By adopting the above structure, the post-filter core 10 further removes volatile organic compounds, residual chlorine, odors and pigments that may be left in water after the RO / NF filter core 2, improving the taste and purity of the water quality.

[0077] In this embodiment, the sterilization assembly 11 sterilizes by ultraviolet rays, and in other embodiments, the sterilization assembly 11 can also sterilize in other forms, which is not limited here.

[0078] As shown in the drawings, Figure 1As shown, the first user end 5 includes a normal temperature water user end 51 and a hot water user end 52, the sterilization assembly 11 is directly communicated with the normal temperature water user end 51, and the sterilization assembly 11 is communicated with the hot water user end 52 through the heating assembly. By using the above structure, the user can select normal temperature water or hot water according to actual needs.

[0079] In specific use, the water in the water source passes through the polypropylene melt-blown filter core, the pre-filter core 9, the RO / NF filter core 2, the post-filter core 10 and the sterilization assembly 11 in sequence to produce normal temperature water, which can meet the needs of the user for normal temperature water. When the user needs hot water, the normal temperature water produced by the sterilization assembly 11 can be heated by the heating assembly to meet the needs of the user for hot water. The waste water produced by the RO / NF filter core 2 is stored in the storage tank 31. When the high-pressure switch detects pressure relief (i.e. the user uses soft water), and the liquid level switch shows that the storage tank 31 has water, the motor pump 34 is started to extract the waste water in the storage tank 31 and combine it with the water after the polypropylene melt-blown filter core at the front end to enter the resin tank 41 to be softened.

[0080] The booster pump 12 is arranged between the pre-filter core 9 and the RO / NF filter core 2 to improve the efficiency of water delivery. The purification module water inlet valve 23 is arranged between the coarse filter core 1 and the pre-filter core 9 to control the opening and closing of the coarse filter core 1 and the pre-filter core 9. The second one-way valve 13 is arranged between the post-filter core 10 and the sterilization assembly 11 to prevent the water in the sterilization assembly 11 from flowing back to the post-filter core 10. The normal temperature water valve 53 and the hot water valve 54 are arranged at the normal temperature water user end 51 and the hot water user end 52 respectively to control the opening and closing of the normal temperature water outlet end and the hot water outlet end. In addition, the water outlet end of the sterilization assembly 11 passes through the water valve assembly 19, the flow meter 20, the pump body 21 and the heating body 22 in sequence to reach the hot water outlet end. The third one-way valve 14 is arranged between the storage tank 31 and the resin tank 41 to prevent water from flowing back to the storage tank 31, and the concentrated water valve 15 is arranged between the storage tank 31 and the RO / NF filter core 2 to control the opening and closing of the storage tank 31 and the RO / NF filter core 2. In addition to being softened in the resin tank 41, the water in the storage tank 31 can also be directly drained through the drainage passage 16, and the fourth one-way valve 17 can be arranged on the drainage passage 16. The first passage between the polypropylene melt-blown filter core and the resin tank 41, the second passage between the salt tank 42 and the resin tank 41, and the third passage between the resin tank 41 and the second user end 6 can be controlled by the multi-way water control valve 18 to improve the controllability of the first passage, the second passage and the third passage.

[0081] The embodiment also provides a water purifier, which comprises the filter device 100. The filter device 100 is applied to the water purifier in the above structure, so that the large-particle impurities and suspended matters in the water quality can be removed through the coarse filter element 1. The water treated by the coarse filter flows into the RO / NF filter element 2, and the dissolved solids, microorganisms and other harmful substances in the water can be further removed by using the reverse osmosis or nanofiltration technology, so as to ensure that the water quality reaches a high standard. The filtered water can be supplied to the first user end 5, and the needs of drinking or cooking and the like can be met. Meanwhile, the wastewater generated by the RO / NF filter element 2 in the filtering process is collected by the storage assembly 3, and after being treated by the softening assembly 4, the hardness of the wastewater can be effectively reduced, the water quality can be improved, and the water quality can meet the use requirements of the second user end 6, so that the recycling and saving of water resources are realized. In addition, the polypropylene melt-blown filter element can play the role of coarse filtration, and can also retain the residual chlorine of municipal tap water, so that the growth of colonies of the soft water at the rear end can be appropriately improved by the residual chlorine, and the effect of delaying the odor of dead water can be achieved.

[0082] Although the specific embodiments of the present application are described above, those skilled in the art should understand that this is only an example, and the protection scope of the present application is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present application, and these changes and modifications all fall within the protection scope of the present application.

Claims

1. A filter device, characterized in that The filter device comprises a rough filter core, an RO / NF filter core, a storage assembly and a softening assembly, a water inlet end of the rough filter core is communicated with a water source, a water outlet end of the rough filter core is communicated with a water inlet end of the RO / NF filter core, a water outlet end of the RO / NF filter core is respectively communicated with the storage assembly and a first user end, the storage assembly is used for storing wastewater generated after the RO / NF filter core filters, a water inlet end of the softening assembly is communicated with a water outlet end of the storage assembly, the softening assembly is used for softening the wastewater, and a water outlet end of the softening assembly is communicated with a second user end. The rough filter core comprises a polypropylene melt-blown filter core.

2. The filter device of claim 1, wherein, The softening assembly comprises a resin tank and a salt tank, two ends of the resin tank are respectively communicated with the storage assembly and the second user end, and the salt tank is communicated with the resin tank and is used for regenerating resin in the resin tank.

3. The filter device of claim 1, wherein, The storage assembly comprises a storage tank, a first detection member and a second detection member, the storage tank is communicated with a water inlet end of the softening assembly and is used for storing wastewater generated after the RO / NF filter core filters, the first detection member is used for detecting whether the second user end is opened, and the second detection member is used for detecting a water level in the storage tank and controlling whether a water outlet end of the storage assembly is communicated with the softening assembly according to the water level.

4. The filter device of claim 3, wherein, The storage assembly further comprises a motor pump, and the motor pump is used for pumping water in the storage tank into the softening assembly.

5. The filter device of claim 1, wherein, The filter device further comprises a first one-way valve, a water outlet end of the RO / NF filter core is communicated with the storage assembly through a connecting pipe, and the first one-way valve is arranged on the connecting pipe and is communicated from the water outlet end of the RO / NF filter core to the storage assembly.

6. The filter device of claim 1, wherein, The filter device further comprises a pre-filter core, the pre-filter core is arranged between the rough filter core and the RO / NF filter core and is respectively communicated with the rough filter core and the RO / NF filter core, and the pre-filter core is used for removing chlorine in water.

7. The filter device of claim 6, wherein, The pre-filter core comprises activated carbon.

8. The filter device of claim 1, wherein, The filter device further comprises a post-filter core and a sterilization assembly, and the RO / NF filter core is communicated with the first user end through the post-filter core and the sterilization assembly in sequence.

9. The filter device of claim 8, wherein, The first user end comprises a normal-temperature water user end and a hot water user end, the sterilization assembly is directly communicated with the normal-temperature water user end, and the sterilization assembly is communicated with the hot water user end through a heating assembly.

10. A water purifier characterized by comprising: The water purifier comprises the filter device according to any one of claims 1 to 9.

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