CN106395990B

CN106395990B - Filter equipment and purifier

Info

Publication number: CN106395990B
Application number: CN201610926105.9A
Authority: CN
Inventors: 何耀华; 帅师; 潘涛; 李文明
Original assignee: AO Smith China Water Heater Co Ltd; AO Smith Nanjing Water Treatment Products Co Ltd
Current assignee: AO Smith China Water Heater Co Ltd; AO Smith Nanjing Water Treatment Products Co Ltd
Priority date: 2016-10-24
Filing date: 2016-10-24
Publication date: 2023-09-19
Anticipated expiration: 2036-10-24
Also published as: CN106395990A

Abstract

The invention discloses a filtering device and a water purifier, and relates to the technical field of water treatment. The filtering device and the water purifier can effectively reduce Total Dissolved Solids (TDS) in pure water flowing out of the water purifier.

Description

Filter equipment and purifier

Technical Field

The invention relates to the technical field of water treatment, in particular to a filtering device and a water purifier.

Background

For the existing water purifier, especially for the large-flow barrel-free water purifier, the raw water flowing in from the raw water port is filtered through the filtering device in the use process, the pure water flows out from the pure water port, and the concentrated water is discharged from the concentrated water port. When the water purifier is not in use, concentrated water stays on the concentrated water side of the filtering membrane in the filtering device for filtering, and after the time reaches a certain degree, salt or other soluble solids in the concentrated water can permeate the filtering membrane and then reach the pure water side of the filtering membrane. Thus, when the water purifier is in use again, the Total Dissolved Solids (TDS) of the first cup of purified water flowing out when the water purifier starts to be used is high, which may cause the cup of purified water to have low quality and not be pure enough.

Disclosure of Invention

In order to overcome the above-mentioned drawbacks of the prior art, an embodiment of the present invention provides a filtering device and a water purifier, which can effectively reduce Total Dissolved Solids (TDS) in pure water flowing out of the water purifier.

The specific technical scheme of the embodiment of the invention is as follows:

the utility model provides a filter equipment, includes the shell that has former mouth of a river, pure water mouth and dense water mouth, sets up have in the shell raw water end, pure water end and dense water end filter element, raw water end with former mouth of a river intercommunication, dense water end with dense water mouth intercommunication, pure water end with pure water mouth intercommunication, filter element with clearance between the shell forms first passageway, first passageway with pure water end, pure water mouth intercommunication so that after the filter element handles follow pure water that pure water end flows out is followed after the pure water mouth flows out.

Preferably, the filter member processes raw water flowing in from the raw water end and discharges pure water to a pure water end on a center side, a water collecting pipe for collecting pure water generated by the processing of the filter member is arranged on the center side of the filter member, and the water collecting pipe is communicated with the first channel so that pure water flowing out of the water collecting pipe flows out from the pure water port after passing through the first channel.

Preferably, a sleeve is arranged outside the filter element, the concentrated water end is positioned on the side wall of the filter element, and a second channel communicated with the concentrated water port is formed between the inner wall of the sleeve and the outer wall of the filter element, so that concentrated water generated by the treatment of the filter element flows out from the concentrated water port after passing through the second channel.

Preferably, the first channel and the second channel are independent from each other.

Preferably, a gap is provided between the inner wall of the sleeve and the outer wall of the filter element to form the second passage.

Preferably, a third channel is formed in the housing, which communicates the inside of the water collecting pipe with the first channel.

Preferably, the third passage is located in the opposite direction of the pure water port of the housing.

Preferably, the first channel and the raw water end or the concentrated water end can be communicated through a fourth channel, and a control valve is arranged on the fourth channel.

Preferably, the filter is configured to treat raw water flowing in from the raw water end and discharge pure water to the outside, and concentrate water is discharged to the center side; the center of the filter element is provided with a water collecting pipe for collecting concentrated water generated by the treatment of the filter element; pure water discharged from the outside of the filter element flows out from the pure water port of the housing after passing through the first passage.

A water purifier comprising a filter device as claimed in any one of the preceding claims.

Preferably, the water purifier further comprises: pure water supply means which can communicate with a raw water port or a concentrate port of the filtration means; the water purifier has a cleaning state: in the cleaning state, the pure water supply device is communicated with the raw water port or the concentrated water port of the filter device so that pure water in the pure water supply device flows in from the raw water port of the filter device and is discharged from the concentrated water port of the filter device or flows in from the concentrated water port of the filter device and is discharged from the raw water port of the filter device.

Preferably, the water purifier further comprises:

a water pump which is communicated with the raw water port of the filtering device so as to drive raw water to flow through the filtering device;

the pure water supply device is a water storage device, the water storage device is internally provided with a partition piece, the partition piece divides the interior of the water storage device into a first cavity and a second cavity which are isolated from each other, the partition piece can adjust the sizes of the first cavity and the second cavity, and the first cavity can be communicated with the pure water port and can be communicated with the raw water port or the water concentration port;

The water purifier also has a water preparation state:

in the water producing state, the first chamber is communicated with the pure water port, and pure water generated by the filtering device can flow to the first chamber or can flow to a water end for a user.

Preferably, the first chamber is connected in series between the pure water port of the filtering device and a user water end so that pure water generated by the filtering device reaches the user water end after passing through the first chamber.

Preferably, a filter material is arranged in the first chamber, the filter material divides the first chamber into a third chamber and a fourth chamber which are arranged along the filtering direction of the filter material, the third chamber is communicated with the pure water port of the filter device, and the fourth chamber is communicated with the raw water port of the filter device.

Preferably, the fourth chamber communicates with the user water side.

Preferably, in the process that the user stops using water to enable the water storage device to store water, when a preset stopping condition is reached, the water pump stops working; the preset stopping condition at least comprises one of the following: the pressure in the water purifier pipeline meets a preset value, the liquid level in the first cavity meets a preset value, the first preset time and the current of the water pump meet a preset value.

Preferably, when the duration of the closing of the water end for the user exceeds a first preset cleaning duration, the water purifier enters the cleaning state.

Preferably, when the duration of closing the water end of the user exceeds a second preset cleaning duration, the water purifier starts the water pump so that the first chamber stores water and enters the cleaning state; the second preset cleaning time period is longer than the first preset cleaning time period.

Preferably, the water purifier further comprises a fifth switching device disposed between the user water end and the water storage device,

when the duration of closing the water end of the user exceeds the preset standby time, the water end of the user is opened, the water purifier closes the fifth switching device, and the water pump is started to store water in the first chamber and enter the cleaning state; after the water purifier finishes the cleaning state, the fifth switching device is started so that the water purifier can provide pure water for the water use end of the user; wherein the preset standby time period is longer than the second preset cleaning time period.

The technical scheme of the invention has the following remarkable beneficial effects:

According to the invention, the gap between the filter element and the shell in the filter device is provided with the first channel, the first channel is communicated with the pure water end and the pure water port so that pure water flowing out of the pure water end after being treated by the filter element flows out of the pure water port after passing through the first channel, so that the capacity of the filter device for storing pure water is increased due to the existence of the first channel, when the water purifier is in a non-use process, concentrated water stays on the concentrated water side of the filter element which plays a filtering role in the filter device all the time, after the time reaches a certain degree, salt or other soluble solids in the concentrated water permeate the filter element and then reach the pure water end of the filter element, and the pure water stored in the first channel can dilute the concentrated water permeated by the filter element so as to reduce Total Dissolved Solids (TDS) of the first cup of pure water flowing out of the water purifier when the water purifier is in a use process again.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, proportional sizes, and the like of the respective components in the drawings are merely illustrative for aiding in understanding the present invention, and are not particularly limited. Those skilled in the art with access to the teachings of the present invention can select a variety of possible shapes and scale sizes to practice the present invention as the case may be.

Fig. 1 is a schematic structural view of a filtering device according to a first embodiment of the present invention.

Fig. 2 is a schematic structural view of a filtering device according to a second embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a water purifier according to a first embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a water purifier according to a second embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a water purifier according to a third embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a water purifier according to a fourth embodiment of the present invention.

Reference numerals of the above drawings:

1. a filtering device; 11. a pure water port; 12. a water concentration port; 13. a raw water gap; 15. a housing; 16. a filter; 161. a raw water end; 162. a pure water end; 163. a concentrated water end; 17. a first channel; 18. a water collecting pipe; 19. a second channel; 20. a third channel; 201. a sleeve; 2. pure water supply means; 21. a first chamber; 211. a third chamber; 212. a fourth chamber; 22. a second chamber; 23. a spacer; 24. an elastic member; 31. a first switching device; 32. a second switching device; 33. a first control switch; 34. a third switching device; 35. a fourth switching device; 36. a first electromagnet; 37. a second electromagnet; 38. a fifth switching device; 4. a concentrate ratio device; 5. a water pump; 6. a carbon rod filter element; 7. a PP cotton filter element; 8. a filter element is arranged in front; 9. an activated carbon filter element; 10. the user uses the water end.

Detailed Description

The details of the application will be more clearly understood in conjunction with the accompanying drawings and description of specific embodiments of the application. However, the specific embodiments of the application described herein are for the purpose of illustration only and are not to be construed as limiting the application in any way. Given the teachings of the present application, one of ordinary skill in the related art will contemplate any possible modification based on the present application, and such should be considered to be within the scope of the present application.

In order to solve the problem that Total Dissolved Solids (TDS) of a first cup of pure water which starts to flow out is higher when the water purifier is in use again after a period of time when no water is discharged, fig. 1 is a schematic structural view of a first embodiment of a filtering device 1 according to the present application, and as shown in fig. 1, a filtering device 1 is provided in the present application, the filtering device 1 includes a housing 15 having a raw water port 13, a pure water port 11 and a concentrated water port 12, a filter member 16 provided in the housing 15 and having a raw water port 161, a pure water port 162 and a concentrated water port 163, the raw water port 161 being in communication with the raw water port 13, the concentrated water port 163 being in communication with the concentrated water port 12, the pure water port 162 being in communication with the pure water port 11, a gap between the filter member 16 and the housing 15 forming a first channel 17, the first channel 17 being in communication with the pure water port 162, so that pure water which has been treated by the filter member 16 flows out from the pure water port 162 through the first channel 17 and then flows out from the pure water port 11.

The filter element 16 is capable of filtering raw water, the raw water flows in from the raw water port 13 of the filter device 1 and flows to the raw water end 161 of the filter element 16, the raw water is filtered by the filter element 16, pure water formed after the treatment is discharged from the pure water end 162 of the filter element 16 and then passes through the first channel 17, finally the pure water is discharged from the pure water port 11 of the filter device 1, and concentrated water formed after the treatment is discharged from the concentrated water end 163 of the filter element 16 and then discharged through the concentrated water port 12 of the filter device 1. The raw water end 161 and the concentrate end 163 of the filter member 16 may be located on the concentrate side, and the pure water end 162 of the filter member 16 may be located on the pure water side. In the above process, the first channel 17 is filled with pure water, so that the capacity of the filter device 1 for storing pure water increases, after the filter element 16 is no longer used for filtering raw water, the concentrated water stays at the concentrated water end 163 of the filter element 16 which is used for filtering in the filter device 1, after the time reaches a certain degree, salt or other soluble solids in the concentrated water permeate the filter element 16 and then reach the pure water end 162 of the filter element 16, the concentrated water penetrating the filter element 16 into the pure water end 162 can be diluted by the more pure water stored in the first channel 17, the Total Dissolved Solids (TDS) of the pure water end 162 is reduced, and when the water purifier is in use again, the pure water with the reduced Total Dissolved Solids (TDS) in the pure water end 162 and the first channel 17 is discharged for a user, and in this way, the Total Dissolved Solids (TDS) of the first cup of pure water flowing out of the water purifier is effectively reduced.

In order to further understand the present filter device 1, it will be described and explained in detail below. In the first embodiment, as shown in fig. 1, the filter device 1 includes a housing 15 having a raw water port 13, a pure water port 11, and a concentrate water port 12, and a filter 16 having a raw water end 161, a pure water end 162, and a concentrate water end 163 is provided in the housing 15. The filter element 16 may include at least one of a reverse osmosis membrane filter element 16 and a nanofiltration membrane filter element 16. The raw water end 161 of the filter 16 communicates with the raw water port 13, the concentrate end 163 communicates with the concentrate port 12, the pure water end 162 communicates with the pure water port 11, and a gap between the filter 16 and the housing 15 forms the first passage 17. The filter 16 processes raw water flowing in from the raw water end 161 and discharges pure water to the pure water end 162 on the center side, a water collecting pipe 18 for collecting pure water generated by the processing of the filter 16 is provided on the center side of the filter 16, and the water collecting pipe 18 communicates with the first passage 17 so that pure water flowing out of the water collecting pipe 18 flows out from the pure water port 11 after passing through the first passage 17. The sidewall of the water collecting pipe 18 is provided with a through hole, when raw water flowing in from the raw water end 161 is treated in the filter element 16 and pure water is discharged to the pure water end 162 on the center side, the through hole of the water collecting pipe 18 is collected in the water collecting pipe 18, the collected pure water can be discharged from either one or both ends of the water collecting pipe 18, then flows to the gap between the filter element 16 and the housing 15 to form the first channel 17, and finally is discharged from the pure water port 11 of the housing 15 to the filter device 1.

A sleeve 201 is disposed outside the filter element 16, the concentrated water end 163 of the filter element 16 is located on the side wall of the filter element 16, and a second channel 19 communicating with the concentrated water port 12 is formed between the inner wall of the sleeve 201 and the outer wall of the filter element 16, so that the concentrated water generated by the treatment of the filter element 16 flows out from the concentrated water port 12 after passing through the second channel 19. The sleeve 201 is substantially cylindrical and is fitted over the side wall of the filter element 16, and a gap is formed between the inner wall of the sleeve 201 and the outer wall of the filter element 16, so that the second passage 19 is formed. At least one sealing member may be provided between the upper and/or lower end of the filter member 16 and the housing 15 to isolate the second passage 19 from the raw water end 161 of the filter member 16, independent of each other; the seal may also isolate the second channel 19 from the first channel 17, independently of each other, in particular the seal may be a sealant or the like.

Within the housing 15 is a third passage 20 communicating the interior of the water collection pipe 18 with the first passage 17. The third channel 20 may be directly formed on the housing 15, or the third channel 20 may be formed by a connection pipe disposed in the housing 15, and the connection pipe may connect the interior of the water collecting pipe 18 and the first channel 17. For example, the connection pipe may be integrally formed directly with the water collecting pipe 18 so that pure water collected in the water collecting pipe 18 flows into the connection pipe and then flows into the first passage 17. The third passage 20 may be located in the opposite direction of the pure water port 11 of the housing 15 such that pure water in the water collecting pipe 18 needs to completely flow through the first passage 17 after flowing into the third passage 20 to flow out of the pure water port 11 of the housing 15. Through the structure, the pure water stored in the first channel 17 can always keep a running water state, and whenever the filtering device 1 is used, the pure water in the first channel 17 can be replaced at any time, so that impurities possibly accumulated and generated in the first channel 17 are prevented from generating or bacteria are prevented from growing, and the quality of the pure water flowing out of the pure water port 11 of the shell 15 is ensured. Of course, in other possible embodiments, the third passage 20 may also be located in the same direction as the pure water port 11 of the housing 15.

In the present embodiment, the sleeve 201 is also effective to reduce the volume of the filter device 1 storing concentrate at the concentrate end 163 and the second passage 19 communicates the concentrate end 163 with the concentrate port 12. When the concentrate side of the filter device 1 is rinsed with pure water, the amount of pure water is effectively reduced because the sleeve 201 reduces the volume of concentrate stored at the concentrate end 163 of the filter device 1.

In the present embodiment, the first passage 17 and the raw water end 161 or the concentrate end 163 can communicate with each other through a fourth passage, and a control valve is provided in the fourth passage. The fourth channel may be formed by a connecting tube, which may be located inside the housing, may be located outside the housing, or may be formed directly on the housing. When the filtration apparatus 1 is in the filtration state, the control valve is closed, so that the pure water in the first passage 17 is prevented from flowing back to the raw water end 161 or the concentrate end 163. When it is necessary to flush the filter device 1, the control valve is opened, the first passage 17 communicates with the raw water end 161 or the concentrate end 163, and pure water in the first passage 17 can flow to the raw water end 161 or the concentrate end 163 of the filter member to flush the filter member 16. Specifically, the pure water in the first passage 17 can flow to the raw water end 161 of the filter member 16 to flush the filter member 16 and then be discharged from the concentrated water end 163. Or the pure water in the first channel 17 can flow to the dense water end 163 of the filter element 16 to flush the filter element 16 and then be discharged from the raw water end 161.

In the second embodiment, fig. 2 is a schematic structural diagram of the filtering device 1 according to the second embodiment in the embodiment of the present invention, and as shown in fig. 2, the filtering device 1 includes a housing 15 having a raw water port 13, a pure water port 11, and a concentrate water port 12, and a filter member 16 having a raw water port 161, a pure water port 162, and a concentrate water port 163 is disposed in the housing 15. The raw water end 161 of the filter 16 communicates with the raw water port 13, the concentrate end 163 communicates with the concentrate port 12, the pure water end 162 communicates with the pure water port 11, and the gap between the filter 16 and the housing 15 directly forms the first passage 17. The filter 16 processes raw water flowing in from the raw water end 161 and discharges pure water to the outside, and concentrated water to the center side; the center of the filter element 16 is provided with a water collecting pipe 18 for collecting the concentrated water produced by the treatment of the filter element 16; pure water discharged from the outside of the filter 16 passes through the first passage 17 and then flows out from the pure water port 11 of the housing 15. The sidewall of the water collecting pipe 18 is provided with a through hole, and when the raw water flowing in from the raw water end 161 is treated in the filter 16 and the concentrated water is discharged to the concentrated water end 163 on the center side, the concentrated water flows into the through hole of the water collecting pipe 18 and is collected in the water collecting pipe 18, and the collected concentrated water can be discharged from either one or both ends of the water collecting pipe 18 and then discharged from the concentrated water port 12 of the housing 15 to the filter device 1. Also, in the present embodiment, the filter 16 may include at least one of a reverse osmosis membrane filter 16 and a nanofiltration membrane filter 16.

In the present application, a water purifier is also proposed, which comprises the filter device 1 of any of the above embodiments.

Fig. 3 is a schematic structural diagram of a water purifier according to a first embodiment of the present application, where, as shown in fig. 3, the water purifier may further include: the pure water supply device 2 is capable of communicating with the raw water port 13 or the concentrate port 12 of the filtration device 1. The water purifier has a cleaning state: in the cleaning state, the pure water supply device 2 communicates with the raw water port 13 of the filter device 1 so that pure water in the pure water supply device 2 flows in from the raw water port 13 of the filter device 1 and is discharged from the water concentration port 12 of the filter device 1.

The raw water port 13 of the self-filtering device 1 is sequentially connected with a water pump 5, a third switching device 34, a carbon rod filter element 6, a PP cotton filter element 7, a pre-filter element 8 and a water inlet ball valve connected with a water source. The PP cotton filter element 7 and the carbon rod filter element 6 are used for filtering pollutants in fluid, and the particle size grade of the filtered pollutants is smaller than that of the pollutants filtered by the front filter element 8. The third switching device 34 is used for controlling the on-off of a pipeline between the carbon rod filter element 6 and the water pump 5. The water pump 5 is used for pressurizing the fluid in the pipeline and delivering the fluid to the raw water port 13 of the filtering device 1, and is used for guaranteeing the pressure in the pipeline, so that the filtering device 1 can filter the fluid in the pipeline under the action of sufficient pressure. Meanwhile, the water pump 5 may also be a diaphragm pump, and when the water pump 5 is in a closed state, fluid can flow through the water pump 5.

The water concentration port 12 of the filtering device 1 may be connected with the water concentration ratio device 4. The dense water ratio device 4 is used for controlling the pressure of the dense water port 12 of the filter device 1, so that a reasonable pressure difference exists inside the filter device 1, the filtering function of the filter device 1 is guaranteed, meanwhile, the pressure difference inside the filter device 1 can be regulated, and the volumetric flow of the filter device 1 for filtering the fluid is controlled, namely, the greater the pressure difference is, the greater the volumetric flow of the filter device 1 for filtering the fluid is. The concentrate ratio device 4 may be connected to the concentrate port 12 of the filter device 1 alone, or may be connected to a quick drain path in parallel with the concentrate ratio device 4 of the water purifier, and a fourth switch device 35 may be provided on the quick drain path. When the water purifier needs to clean the filter device 1, pure water discharged from the pure water supply device 2 flows in from the raw water port 13 of the filter device 1, the pure water washes the filter device 1 first, then is discharged from the concentrate port 12 of the filter device 1, and then flows through the concentrate ratio device 4, so that the remaining concentrate on the concentrate side of the filter element 16 is washed away and replaced with pure water, the pure water is used on both sides of the filter element 16 during the non-use of the water purifier, and the Total Dissolved Solids (TDS) on the concentrate side of the filter element 16 is not easily increased for a long time. Therefore, when the water purifier is in the water producing state again, the Total Dissolved Solids (TDS) of the first cup of pure water flowing out when the water purifier starts to be used is further reduced.

The pure water washes the concentrate ratio device 4 while the pure water flows through the concentrate ratio device 4, so that the original concentrate in the concentrate ratio device 4 is washed away by the pure water. By the above mode, the pure water of the pure water supply device 2 washes the filter device 1, so that the service life of the filter piece 16 in the filter device 1 is effectively prolonged, meanwhile, pure water flowing out of the water concentration port 12 of the filter device 1 can wash the water concentration device 4 in the water purifier, and the service life of the water concentration device 4 is prolonged. When the concentrated water ratio device 4 is not required to be washed, the fourth switching device 35 can be opened, the water purifier can be rapidly washed, and water discharged from the concentrated water port 12 is directly discharged from the rapid water discharge path.

In another embodiment, the pure water supply device 2 may also communicate with the water concentration port 12 of the filtration device 1 so that pure water in the pure water supply device 2 flows in from the water concentration port 12 of the filtration device 1 and is discharged from the raw water port 13 of the filtration device 1. In the present embodiment, the quick drain is connected to the raw water port 13, and the fourth switch device 35 is provided on the quick drain, and when the filter device 1 needs to be flushed, the fourth switch device 35 is turned on, so that pure water discharged from the pure water supply device 2 flows in from the concentrate port 12 of the filter device 1, and the pure water first flushes the concentrate side of the filter device 1, then is discharged from the raw water port 13 of the filter device 1, and finally is discharged from the fourth switch device 35.

As shown in fig. 3, the pure water supply device 2 may be a water storage device having a partition member 23 therein, the partition member 23 partitioning the inside of the water storage device into a first chamber 21 and a second chamber 22 isolated from each other, the partition member 23 being capable of adjusting the sizes of the first chamber 21 and the second chamber 22, the first chamber 21 being capable of communicating with the pure water port 11 and communicating with the raw water port 13 or the water concentration port 12. The water purifier also has a water making state: in the water producing state, the first chamber 21 communicates with the pure water port 11, and pure water generated by the filtering device 1 can flow to the first chamber 21 or can flow to the user water end 10.

Specifically, the first chamber 21 of the water storage device has a first opening connected to the raw water port 13 of the filter device 1 and a second opening connected to the pure water port 11 and the user water port 10. A first switching device 31 is provided between the first chamber 21 and the raw water port 13, and a second switching device 32 is provided between the first chamber 21 and the pure water port 11. The separator 23 may be an air bag, the interior of which is a second chamber 22, the interior of which is filled with gas. The partition 23 may also be in airtight contact with the sidewall of the water storage device so that the second chamber 22 forms an airtight space, and air is stored in the second chamber 22. The second chamber 22 may be formed by the partition 23 together with the side wall of the water storage means, or the partition 23 may be formed separately, the partition 23 may be a flexible membrane or may be a substance such as rubber having a certain amount of elasticity, depending on whether the air stored in the second chamber 22 provides sufficient pressure after compression to press the pure water stored in the first chamber 21 out of the washing filter device 1. The first chamber 21 can be communicated with the raw water port 13 and the pure water port 11 respectively. A first switching device 31 is provided between the first chamber 21 and the raw water port 13, and a second switching device 32 is provided between the first chamber 21 and the pure water port 11. After the user of the water purifier stops using the water end 10, the water pump 5 continues to run, the first chamber 21 is in a communication state with the pure water port 11, the first chamber 21 is in a disconnection state with the raw water port 13, pure water flowing out of the pure water port 11 of the filter device 1 flows into the first chamber 21 of the water storage device, and at the moment, the separator 23 is compressed because of a certain pressure of the pure water flowing out of the pure water port 11, the volume of the first chamber 21 is increased, the volume of the second chamber 22 is reduced, and then the first chamber 21 finishes water storage. In the cleaning state, the first chamber 21 is in a disconnected state from the pure water port 11, and the first chamber 21 is in a communicating state with the raw water port 13. Under the action of the gas pressure in the second chamber 22, the isolation piece 23 presses the pure water in the first chamber 21 out of the first chamber 21, so that the pure water flows into the raw water port 13 of the filtering device 1, the pure water washes the inside of the filtering device 1, and the concentrated water on the concentrated water side of the filtering piece 16 in the filtering device 1 is washed away and discharged, so that the Total Dissolved Solids (TDS) of the first cup of pure water flowing out when the water purifier starts to be used are effectively reduced.

In other embodiments, fig. 4 is a schematic structural diagram of a water purifier according to a second embodiment of the present invention, as shown in fig. 4, the water storage device has a first chamber 21 with an adjustable volume inside, the first chamber 21 of the water storage device has a first opening connected to the raw water port 13 of the filtering device 1 and a second opening connected to the pure water port 11 and the user water end 10. A first switching device 31 is provided between the first chamber 21 and the raw water port 13, and a second switching device 32 is provided between the first chamber 21 and the pure water port 11. The first switch device 31 and the second switch device 32 are used for controlling the on-off between the first chamber 21 of the water storage device and the raw water port 13 of the filter device 1 and the on-off between the first chamber 21 of the water storage device and the pure water port 11 of the filter device 1. For example, the first and second switching devices 31 and 32 may be solenoid valves, which may be paired with check valves for preventing reverse flow. In one embodiment, the water storage device has an elastic member 24 therein which can adjust the volume of the first chamber 21. The elastic member 24 may be a film having a strong elasticity, and may be made of rubber, ethylene propylene diene monomer, neoprene, or the like, for example. In yet another embodiment, the water storage device has a partition 23 therein, the partition 23 dividing the interior of the water storage device into a first chamber 21 and a second chamber 22 isolated from each other, the partition 23 being capable of adjusting the sizes of the first chamber 21 and the second chamber 22. The first chamber 21 of the water storage device has a first opening connected to the raw water port 13 of the filter device 1 and a second opening connected to the pure water port 11 and the user water port 10. The spacer 23 may be a piston or a diaphragm having flexibility. In addition, fig. 5 is a schematic structural diagram of a water purifier according to a third embodiment of the present invention, as shown in fig. 5, the second chamber 22 can be communicated with a water source or an air source, so that air or liquid can be introduced into the second chamber 22 to provide a power source for increasing the volume of the second chamber 22. Wherein, the water source can be tap water, and the air source can be a gas cylinder with higher pressure. In the above-described structure, particularly when the second chamber 22 communicates with the tap water source, the communication and disconnection of the second chamber 22 with the tap water source can be controlled by the first control switch 33, and the tap water source not only supplies the raw water to the present water purifier, but also simultaneously supplies the second chamber 22 with a pressure that satisfies the requirements, which can ensure that the pure water stored in the first chamber 2121 is pressed out, thereby cleaning the filter device 1. In the above embodiments, the second chamber 22 may not be in communication with a water or air source. For example, when the spacer 23 is a piston, a resilient member 24, such as a spring, may be provided in the second chamber 22. When the user of the water purifier stops using the water end 10, the water pump 5 continues to operate, the first chamber 21 is in communication with the pure water port 11, the first chamber 21 is in disconnection with the raw water port 13, pure water flowing out of the pure water port 11 is pressed into the first chamber 21, at this time, the spring in the second chamber 22 contracts, the piston slides, the volume of the second chamber 22 decreases, and the volume of the first chamber 21 increases to store the inflow pure water. When the water purifier needs pure water for cleaning, the first chamber 21 and the pure water port 11 are in a disconnected state through the first switch device 31 and the second switch device 32, and the first chamber 21 and the raw water port 13 are in a communicated state. At this time, the spring in the second chamber 22 pushes the piston to slide, the volume of the second chamber 22 is increased, the volume of the first chamber 21 is reduced to press out pure water stored therein, and the pure water is caused to flow into the raw water port 13 of the filtering device 1 to be washed under the action of the spring. In still another embodiment, fig. 6 is a schematic structural diagram of a water purifier according to a fourth embodiment of the present invention, as shown in fig. 6, the water storage device includes a partition 23, the partition 23 partitions the interior of the water storage device into a first chamber 21 and a second chamber 22 that are isolated from each other, and the partition 23 can adjust the sizes of the first chamber 21 and the second chamber 22. The first chamber 21 of the water storage device has a first opening connected to the raw water port 13 of the filter device 1 and a second opening connected to the pure water port 11 and the user water port 10. The second chamber 22 of the water storage device may communicate with the outside to ensure the air pressure inside. A first switching device 31 is provided between the first chamber 21 and the raw water port 13, and a second switching device 32 is provided between the first chamber 21 and the pure water port 11. A first electromagnet 36 is provided on the partition 23, and a second electromagnet 37 is provided in the second chamber 22 opposite to the first electromagnet 36 so that the volume of the first chamber 21 is increased or decreased by the first electromagnet 36 and the second electromagnet 37. After the user water end 101 of the water purifier is opened, the water pump 5 operates, the first chamber 21 is in a communicating state with the pure water port 11, the first chamber 21 is in a disconnecting state with the raw water port 13, pure water flowing out of the pure water port 11 of the filtering device 1 flows into the first chamber 21 of the water storage device, and in order to avoid the influence of water storage of the water storage device on the water yield of the user water end 10 at the moment, the first electromagnet 36 and the second electromagnet 37 are controlled to repel each other, the partition piece 23 moves, so that the first chamber 21 is reduced, and the second chamber 22 is increased. After the water consumption end 10 of the water purifier stops consuming water, the water pump 5 continues to operate, the first electromagnet 36 and the second electromagnet 37 are controlled to attract each other, the spacer 23 moves, the first chamber 21 becomes larger, and the second chamber 22 becomes smaller, so that the first chamber 21 stores pure water. After storage, the second switching device 32 may be turned off. When the pure water is required to be cleaned later, the first chamber 21 is in a disconnected state with the pure water port 11, the first chamber 21 is in a communicated state with the raw water port 13, the first electromagnet 36 and the second electromagnet 37 are controlled to repel each other, the partition piece 23 moves so that the first chamber 21 is smaller, and the second chamber 22 is enlarged, so that the pure water stored in the first chamber 21 is pressed out and flows into the filter device 1, and the filter device 1 is cleaned. The concentrated water on the concentrated water side of the filtering membrane in the filtering device 1 is flushed away and discharged, so that the Total Dissolved Solids (TDS) of the first cup of pure water flowing out when the water purifier starts to be used are effectively reduced.

Further, a filter material may be provided in the first chamber 21. The filter material may be an activated carbon filter cartridge 9 or the like. The filter material divides the first chamber 21 into a third chamber 211 and a fourth chamber 212 arranged along the filtering direction of the filter material, the third chamber 211 is communicated with the pure water port 11 of the filter device 1, and the fourth chamber 212 is communicated with the raw water port 131 of the filter device 1. Meanwhile, the fourth chamber 212 communicates with the user water side 101. The first chamber 21 of the water storage device is connected in series between the pure water port 11 of the filter device 1 and the user water end 10, so that pure water flowing out of the pure water port 11 of the filter device 1 must flow through the first chamber 21 of the water storage device every time when reaching the user water end 10, water which can be stored in the first chamber 21 of the water storage device is running water, impurities or bacteria which are difficult to accumulate in the first chamber 21 of the water storage device or grow in the long-term use process are guaranteed, the quality of the pure water when the water storage device washes the filter device 1 is guaranteed, and the quality of the water used by the user water end 10 is finally guaranteed. Secondly, when the user uses the water end 10 to stop using water (turn off), the water pump 5 will continue to operate for a period of time, and the water storage device stores pure water for cleaning the filtering device 1 after the user uses the water end 10 to stop using water, because the filtering device 1 has limited flow rate per unit time, in normal state, the water storage device can only barely meet the requirement of the user, and users who have no patience complain that the water yield is too small, the waiting time for pouring a cup of water is too long, or when the water purification mechanism is started, the pure water can be discharged after waiting for a period of seconds. If the water storage device is used for storing pure water when the user uses the water end 10 to receive water, the pure water which is diverted away can lead to less pure water which flows out from the user uses the water end 10, and the use experience of the user can be seriously affected. Therefore, in the water purifier, the pure water stored in the water storage device for flushing is generally arranged at the user water end 10 after water consumption is stopped, so that the situation that the water output at the user water end 10 is reduced can be avoided.

In the above embodiment, after the user uses the water end 10 to stop using water, the water pump 5 continues to operate to make the water storage device store water, and when the preset stop condition is reached, the water pump 5 stops working, at this time, it indicates that the water storage device has completed storing water. The preset stopping condition at least comprises one of the following: the pressure in the water purifier line meets the preset value, the liquid level in the first chamber 21 meets the preset value, the first preset time and the current of the water pump 5 meet the preset value. When the water storage device is full of water, at this time, the water pump 5 is continuously operated, and the pressure in the pipeline is further increased, so that when the pressure in the pipeline of the water purifier meets a preset value, the operation of the water pump 5 can be stopped. In another way, after the water storage device is full of water, that is, the liquid level in the first chamber 21 in the water storage device can meet the preset value, the liquid level in the first chamber 21 can be detected by the liquid level detection device arranged in the first chamber 21 to determine whether the liquid level in the first chamber 21 meets the preset value, and if so, the water pump 5 is stopped. In yet another mode, when the water storage device is full of water, at this time, since the water pump 5 is continuously operated, but the water pump 5 cannot input water into the water storage device, at this time, the current of the water pump 5 is changed, and when the current of the water pump 5 is detected to meet a preset value after the change (indicating that the water storage device is full of water), the operation of the water pump 5 is stopped.

When the user stops using water from the water use terminal 10 and after the water storage device is full of water, the water purifier can judge when to enter the cleaning state. In an alternative embodiment, the water purifier enters the cleaning state immediately after the water storage device is full of water, and the filtering device 1 is cleaned to the greatest extent. In order to avoid wasting water by washing the filtering apparatus 1 too many times, the water purifier may be put into a washing state when the user's water end 10 is closed for a duration exceeding a first preset washing duration. For example, the first preset cleaning time period can be set to 12 hours, in general, after the filtering device 1 is cleaned by pure water in the water storage device, the total dissolved solids of the water in the filtering device 1 cannot be obviously increased within a certain time, so that the total dissolved solids of the water purifier just discharged can be effectively reduced by setting the reasonable first preset cleaning time period, and the waste of water resources caused by excessive cleaning times can be avoided.

Since there may be no water for a long time at the user water end 10, the water storage device has no opportunity to store water after the last washing of the filter device 1. So when the user water end 10 is closed for a duration exceeding a second preset cleaning duration, the water purifier turns on the water pump 5 to store water in the first chamber 21 and enters a cleaning state; the second preset cleaning time period is longer than the first preset cleaning time period.

When the user uses the water end 10 for a longer time without water, for example, the user does not use the water purifier for a long time when going on business, the water purifier enters a standby state after the unused time reaches a preset standby time, and the water purifier does not clean the filtering device 1 in the standby state. In the above case, as shown in the drawing, the water purifier further includes a fifth switching means 38 provided between the user water side 10 and the water storage means, and when the user water side 10 is turned on (the user uses the water purifier again) after the duration of the user water side 10 being turned off exceeds the preset standby period, the water purifier first performs the water storage operation on the water storage means and cleans the filtering means 1 since the water purifier is not used for a long time. The operation of the water purifier is as follows, the water purifier closes the fifth switching device 38 and turns on the water pump 5 to store water in the first chamber 21 and enters a cleaning state; after the water purifier is in a cleaning state, the fifth switch device 38 is turned on so that the water purifier can provide pure water to the user water use end 10; wherein the preset standby period is longer than the second preset cleaning period. In the above case, the water purifier may be further provided with a display screen, which may display, for example, a caption such as "wash in progress, please slightly" or the like to inform the user that the water purifier is performing a washing operation without pure water flowing out, in the case that the user's water side 10 is opened without water.

After the water purifier is stopped at the water end 10 for the user, the water pump 5 continues to work for a period of time, whether the water storage device finishes water storage is detected, and if the water storage is finished, the water purifier turns off the water pump 5. Meanwhile, the water purifier is used for cleaning the filtering device 1 according to the actual use condition of the water purifier by a user, so that the Total Dissolved Solids (TDS) of the first cup of pure water when the water purifier is discharged are effectively reduced under the condition that the cleaning times are as few as possible, the damage to the filtering device 1 caused by long-term repeated cleaning is reduced on the premise of saving water, and the service life of the water purifier is prolonged.

In the description of the present application, it should be noted that, unless otherwise specified and defined, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanical or electrical, or may be in communication with each other between two elements, directly or indirectly through intermediaries, as would be understood by those skilled in the art, and the specific meaning of the terms described above may be understood as appropriate.

In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by differences from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.

The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.

Claims

1. The filtering device is characterized by comprising a shell with a raw water port, a pure water port and a concentrated water port, a filtering piece is arranged in the shell and is provided with a raw water end, a pure water end and a concentrated water end, the raw water end is communicated with the raw water port, the concentrated water end is communicated with the concentrated water port, the pure water end is communicated with the pure water port, a first channel is formed by a gap between the filtering piece and the shell, and the first channel is communicated with the pure water end and the pure water port so that pure water flowing out of the pure water end after being processed by the filtering piece flows out of the pure water port after passing through the first channel; the first channel increases the capacity of pure water stored in the filtering device, so that the pure water stored in the first channel can dilute the concentrated water entering the pure water end through the filtering piece, and the total dissolved solids of the pure water end are reduced;

The filter is used for treating the raw water flowing in from the raw water end and discharging pure water to a pure water end on the center side; the filter element is provided with a sleeve outside, the concentrated water end is positioned on the side wall of the filter element, a second channel communicated with the concentrated water port is formed between the inner wall of the sleeve and the outer wall of the filter element, so that concentrated water generated by the treatment of the filter element flows out from the concentrated water port after passing through the second channel; a gap is formed between the inner wall of the sleeve and the outer wall of the filter element to form the second channel;

the filter element comprises a reverse osmosis membrane filter element and/or a nanofiltration membrane filter element.

2. The filtration device according to claim 1, wherein when the filter member treats raw water flowing in from the raw water end and discharges pure water to the pure water end on the center side, a water collecting pipe for collecting pure water generated by the treatment of the filter member is provided on the center side of the filter member, and the water collecting pipe communicates with the first passage so that pure water flowing out of the water collecting pipe flows out from the pure water port after passing through the first passage.

3. The filter device of claim 1, wherein the first channel and the second channel are independent of each other.

4. The filter device of claim 2, wherein the housing has a third passage therein communicating the interior of the header with the first passage.

5. The filter apparatus of claim 4, wherein the third passage is located in an opposite direction of the pure water port of the housing.

6. The filtration device of claim 1, wherein the first passage and the raw water end or the concentrate end are communicable with each other through a fourth passage on which a control valve is provided.

7. A water purifier comprising the filter device according to any one of claims 1 to 6.

8. The water purifier of claim 7, further comprising: pure water supply means which can communicate with a raw water port or a concentrate port of the filtration means; the water purifier has a cleaning state: in the cleaning state, the pure water supply device is communicated with the raw water port or the concentrated water port of the filter device so that pure water in the pure water supply device flows in from the raw water port of the filter device and is discharged from the concentrated water port of the filter device or flows in from the concentrated water port of the filter device and is discharged from the raw water port of the filter device.

9. The water purifier of claim 8, further comprising:

the water purifier also has a water preparation state:

10. The water purifier of claim 9, wherein the first chamber is connected in series between the pure water port of the filter device and a user water side such that pure water generated by the filter device reaches the user water side after passing through the first chamber.

11. The water purifier of claim 9, wherein a filter material is disposed in the first chamber, the filter material dividing the first chamber into a third chamber and a fourth chamber arranged along a filtering direction of the filter material, the third chamber being in communication with the pure water port of the filter device, and the fourth chamber being in communication with the raw water port of the filter device.

12. The water purifier of claim 11, wherein the fourth chamber communicates with the user water side.

13. The water purifier of claim 9, wherein the water pump stops working when a preset stop condition is reached in the process that the user stops using water to store water in the water storage device; the preset stopping condition at least comprises one of the following: the pressure in the water purifier pipeline meets a preset value, the liquid level in the first cavity meets a preset value, the first preset time and the current of the water pump meet a preset value.

14. The water purifier of claim 9, wherein the water purifier comprises a water inlet and a water outlet,

and when the duration of closing the water end of the user exceeds a first preset cleaning duration, the water purifier enters the cleaning state.

15. The water purifier of claim 14, wherein the water purifier comprises a water inlet and a water outlet,

when the duration of closing the water using end of the user exceeds a second preset cleaning duration, the water purifier starts the water pump so that the first chamber stores water and enters the cleaning state; the second preset cleaning time period is longer than the first preset cleaning time period.

16. The water purifier of claim 15, further comprising a fifth switching device disposed between the user water side and the water storage device,