CN106345306B

CN106345306B - Control method of water purifier

Info

Publication number: CN106345306B
Application number: CN201610926162.7A
Authority: CN
Inventors: 帅师; 程兆山; 张海峰
Original assignee: AO Smith China Water Heater Co Ltd
Current assignee: AO Smith China Water Heater Co Ltd
Priority date: 2016-10-24
Filing date: 2016-10-24
Publication date: 2020-01-10
Anticipated expiration: 2036-10-24
Also published as: CN106345306A

Abstract

The invention discloses a control method of a water purifier, which relates to the technical field of water treatment, wherein the water purifier comprises a filtering device, a water inlet, a pure water inlet and a concentrated water inlet, wherein the water inlet and the concentrated water inlet are positioned on the raw water side of the filtering device; a pure water supply device which can be communicated with the raw water side; an opening/closing valve communicated with the raw water side; the control method comprises the following steps: the open-close valve is in an open state, so that the raw water passes through the filter device from a raw water port of the filter device and flows out from a thick water port or the raw water passes through the filter device from a thick water port of the filter device and flows out from the raw water port; when a preset condition is satisfied, the pure water supply device is communicated with the raw water side to cause pure water to flow into the raw water side. The control method of the water purifier can effectively reduce the consumption of pure water in the process of flushing the filter device of the water purifier and ensure that the Total Dissolved Solids (TDS) of the first cup of pure water flowing out when the water purifier starts to be used after flushing can be effectively reduced.

Description

Control method of water purifier

Technical Field

The invention relates to the technical field of water treatment, in particular to a control method of a water purifier.

Background

For the existing water purifier, especially for the high-flow non-barrel water purifier, raw water flowing in from a raw water port is filtered by a filtering device in the using process, pure water flows out from the pure water port, and concentrated water is discharged from a concentrated water port. When the water purifier is not used, concentrated water stays at the concentrated water side or the raw water side of the filtering membrane with the filtering function in the filtering device, and after the time reaches a certain degree, salt or other soluble solids in the concentrated water can permeate the filtering membrane and further reach the pure water side of the filtering membrane. So, when the purifier was in the use once more, this purifier was flowed when beginning to use the first cup of pure water's Total Dissolved Solids (TDS) is on the high side, probably causes the quality of this cup of pure water on the low side, and is not pure enough.

In order to effectively reduce the problem that the Total Dissolved Solids (TDS) of the first cup of pure water flowing out when the water purifier starts to be used is higher, the pure water supply device installed in the water purifier can be used for flushing the filter device in the water purifier by using pure water so as to reduce the Total Dissolved Solids (TDS) of water accumulated in the filter device, but the water purifier is generally still in the original volume size, so that the volume of the pure water supply device installed in the water purifier is limited, the stored pure water amount is limited, and the flushing effect cannot meet ideal requirements due to the limited pure water amount when the filter device is flushed.

Disclosure of Invention

In order to overcome the above defects in the prior art, an embodiment of the present invention provides a control method for a water purifier, which can effectively reduce the usage amount of pure water during flushing a filter device of the water purifier and ensure that the Total Dissolved Solids (TDS) of a first cup of pure water flowing out of the water purifier when the water purifier starts to be used can be effectively reduced after flushing.

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

a control method of a water purifier, the water purifier comprising a filtering device having a raw water port, a pure water port, and a concentrated water port, the raw water port and the concentrated water port being located on a raw water side of the filtering device; a pure water supply device which can be communicated with the raw water side; an opening/closing valve communicating with the raw water side;

the control method comprises the following steps:

the open-close valve is in an open state, so that raw water passes through the filter device from a raw water port of the filter device and flows out from the thick water port, or raw water passes through the filter device from a thick water port of the filter device and flows out from the raw water port;

and when a preset condition is met, communicating the pure water supply device with the raw water side to enable pure water to flow into the raw water side.

Preferably, in the step of communicating the pure water supply device with the raw water side to allow pure water to flow into the raw water side, the pure water supply device is communicated with the raw water port to allow pure water to flow into the raw water port and flow out of the concentrate port.

Preferably, the open-close valve communicates with the concentrate port.

Preferably, in the step of communicating the pure water supply device with the raw water side to allow pure water to flow into the raw water side, the pure water supply device is communicated with the concentrate port to allow pure water to flow in from the concentrate port and flow out from the raw water port.

Preferably, the open/close valve communicates with the raw water port.

Preferably, the pure water supply device comprises a water storage device which can be communicated with the pure water port so that the pure water flowing out of the filtering device flows into the water storage device for storage.

Preferably, the water storage device is provided with an elastic partition, the partition partitions the interior of the water storage device into a first chamber and a second chamber which are isolated from each other, the partition can adjust the size of the first chamber and the size of the second chamber, and the first chamber can be respectively communicated with the raw water side, the purified water port and the user water end.

Preferably, when a second preset condition is satisfied, the on-off valve is in an open state, so that the raw water passes through the filter device from the raw water port of the filter device and flows out from the concentrate water port, or the raw water passes through the filter device from the concentrate water port of the filter device and flows out from the raw water port, and the second preset condition at least includes one of the following conditions: the pressure in the pipeline of the water purifier meets a preset value, the liquid level in the first chamber meets a preset value, the second preset time and the current of the water pump meet preset values.

Preferably, the first preset condition at least comprises one of the following conditions: a first preset time, a preset flow rate and a TDS value of the water flowing out of the raw water side.

Preferably, the water purifier further comprises a water pump communicated with the raw water port of the filtering device, and the control method further comprises:

when the user stops using water, the water pump is continuously kept working, so that the pure water flowing out of the filtering device enters the first chamber.

Preferably, the pure water supply means and the raw water side are disconnected when a preset condition three is satisfied.

Preferably, the third preset condition at least comprises one of the following conditions: a third preset time, the liquid level in the first chamber not meeting a preset value, and the pressure in the first chamber not meeting a preset value.

Preferably, the first chamber is connected in series between the purified water port and the user water end of the filter device.

Preferably, the filtering device comprises one of a reverse osmosis membrane filtering device and a nanofiltration membrane filtering device.

Preferably, the water purifier further comprises a water pump communicated with the raw water port of the filtering device, a second switch device is arranged between the pure water port and the first chamber, a first switch device is arranged between the first chamber and the raw water port, a wastewater ratio device connected to the concentrated water port is connected with the wastewater ratio device in parallel, the wastewater ratio device is connected with a rapid drainage channel, the on-off valve is arranged on the rapid drainage channel, and a third switch device is arranged in front of a water inlet of the water pump,

when a second preset condition is met, closing the second switch device to control the direction from the first chamber to the pure water port to be in a non-connection state, keeping the first switch device in a disconnection state to enable the first chamber and the raw water port to be in a disconnection state, and opening the on-off valve to enable raw water to pass through the filter device from the raw water port of the filter device and flow out from the concentrated water port;

when a preset condition is met, the third switch device is closed, the first switch device is opened, so that the first chamber is communicated with the raw water port, and the pure water in the first chamber flows into the raw water port.

Preferably, the opening and closing valve is opened when a preset condition two is satisfied and a duration that the user water end is closed exceeds a first preset washing duration.

Preferably, the control method further includes: when the closing duration of the water using end of the user exceeds a second preset cleaning duration, the water pump and the third switching device are started to enable the first chamber to enter a water storage state; and the second preset cleaning time length is longer than the first preset cleaning time length.

Preferably, the water purifier further comprises a fourth switching device arranged between the user water end and the water storage device, and the control method further comprises:

when the duration time of the user water end closing exceeds the preset standby time and the user water end is opened, closing the fourth switching device, and starting the water pump and the third switching device to enable the first chamber to store water;

after the first switch device is closed, the fourth switch device is opened, so that the water purifier can provide pure water for the user water end; wherein the preset standby time is longer than the second preset cleaning time.

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

when the filter device of the water purifier needs to be washed, the open-close valve communicated with the raw water side is opened, so that the raw water passes through the filter device from the raw water port of the filter device and flows out from the concentrated water port, or the raw water passes through the filter device from the concentrated water port of the filter device and flows out from the raw water port, the concentrated water accumulated on the raw water side of the filter device is washed by using the raw water, and the use amount of the pure water in the process of washing the filter device by the water purifier is effectively reduced by washing the raw water.

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, the proportional sizes, and the like of the respective members in the drawings are merely schematic for facilitating the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art, having the benefit of the teachings of this invention, may choose from the various possible shapes and proportional sizes to implement the invention as a matter of case.

Fig. 1 is a schematic water path diagram of flushing in the first embodiment of the invention.

Fig. 2 is a schematic diagram of a flushing circuit according to a second embodiment of the present invention.

Fig. 3 is a schematic water path diagram of a flushing in a third embodiment of the invention.

Fig. 4 is a schematic structural diagram of a water purifier in an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a water storage device of a water purifier in an embodiment of the invention.

Fig. 6 is a schematic structural diagram of a water storage device of a water purifier in an embodiment of the invention.

Fig. 7 is a schematic structural diagram of a water storage device of a water purifier in an embodiment of the invention.

Fig. 8 is a schematic structural diagram of a water purifier in the first embodiment of the present invention.

FIG. 9 is a graph comparing the Total Dissolved Solids (TDS) of the effluent after A2 hours shut-down for a water purifier according to the present invention and a water purifier without a water storage device.

Fig. 10 is a schematic structural diagram of a water purifier according to a second embodiment of the present invention.

Fig. 11 is a schematic structural diagram of a water purifier in a third embodiment according to an embodiment of the present invention.

Fig. 12 is a schematic structural view of a water purifier according to a fourth embodiment of the present invention.

Fig. 13 is a schematic structural view of a water purifier according to a fifth embodiment of the present invention.

Fig. 14 is a schematic structural view of a water purifier according to a sixth embodiment of the present invention.

Fig. 15 is a schematic structural diagram of a water purifier in a seventh embodiment according to an embodiment of the present invention.

Fig. 16 is a schematic structural view of a water purifier according to an eighth embodiment of the present invention.

Fig. 17 is a schematic structural view of a water purifier according to a ninth embodiment of the present invention.

Reference numerals of the above figures:

1. a filtration device; 11. a pure water port; 12. a dense water port; 13. a raw water port; 2. a pure water supply device; 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. an opening and closing valve; 36. a first electromagnet; 37. a second electromagnet; 38. a fourth switching device; 4. a wastewater ratio device; 5. a water pump; 6. a carbon rod filter element; 7. a PP cotton filter element; 8. a front filter element; 9. an activated carbon filter element; 10. a water end is used by a user; a1, a reverse osmosis membrane device; a11 and a pure water port; a12, a dense water gap; a13, a raw water port; a2, a water storage device; a21, a first chamber; a211, a third chamber; a212, a fourth chamber; a22, a second chamber; a23, a spacer; a24, elastic piece; a31, a first switching device; a32, a second switching device; a33, a first control switch; a34, a third switching device; a35, a fourth switching device; a36, a first electromagnet; a37, a second electromagnet; a38, a fifth switching device; a39, one-way valve; a4, a waste water ratio device; a5, a water pump; a6, a carbon rod filter element; a7, PP cotton filter element; a8, a front filter element; a9, an activated carbon filter element; a10, using water for users. .

Detailed Description

The details of the present invention can be more clearly understood in conjunction with the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of illustration only and are not to be construed as limiting the invention in any way. Any possible variations based on the present invention may be conceived by the skilled person in the light of the teachings of the present invention, and these should be considered to fall within the scope of the present invention.

In order to effectively reduce the consumption of pure water in the process of flushing a filter device by a water purifier and ensure that the Total Dissolved Solids (TDS) of a first cup of pure water flowing out when the water purifier starts to be used can be effectively reduced after flushing, the invention provides a control method of the water purifier, fig. 1 is a water path schematic diagram of flushing in a first embodiment in an embodiment of the invention, as shown in fig. 1, the water purifier comprises a filter device 1, which is provided with a raw water port 13, a pure water port 11 and a concentrated water port 12, wherein the raw water port 13 and the concentrated water port 12 are positioned on the raw water side of the filter device 1; a pure water supply device 2 which can communicate with the raw water side; an opening/closing valve 35 communicating with the raw water side; the control method comprises the following steps: the open/close valve 35 is in an open state, and allows raw water to flow from the raw water port 13 of the filter device 1 through the filter device 1 and to flow out from the concentrate port 12, or allows raw water to flow from the concentrate port 12 of the filter device 1 through the filter device 1 and to flow out from the raw water port 13; when a preset condition is satisfied, the pure water supply device 2 is communicated with the raw water side to cause pure water to flow into the raw water side.

In a first embodiment, as shown in fig. 1, the water purifier comprises a filter device 1 having a raw water port 13, a pure water port 11 and a concentrate water port 12, wherein the raw water port 13 and the concentrate water port 12 are located on a raw water side of the filter device 1 and on a waste water side of the filter device 1, and the raw water side and the waste water side can be the same side. The open/close valve 35 is connected to the concentrate port 12, the source water is connected to the raw water port 13, and the pure water supply device 2 is connected to the raw water port 13 in the raw water side, and specifically, the connection and disconnection of the two can be controlled by the first opening/closing device 31. When the filter device needs to be washed, the open/close valve 35 is opened, and the raw water from the water source is made to pass through the filter device 1 from the raw water port 13 of the filter device and flow out from the concentrate port 12, and then is directly discharged from the open/close valve. Since the amount of the raw water is not limited, the concentrated water accumulated on the raw water side of the filter device 1 is washed out thoroughly by the raw water. When a preset condition one is met, namely the raw water is completely flushed, the preset condition one at least comprises one of the following conditions: a first preset time, a preset flow rate and a TDS value of the water flowing out of the raw water side. Then, the washing of the filter unit 1 with the raw water is stopped, and the pure water supply unit 2 is communicated with the raw water side so that the pure water in the pure water supply unit 2 flows into the raw water side, and the raw water side of the filter unit 1 is washed with the pure water. The pure water can flow in from the raw water port 13, flow out from the concentrate port 12, and be discharged through the open/close valve in an open state. And when a third preset condition is met, disconnecting the pure water supply device 2 from the raw water side, and stopping using the pure water for washing. In this way, the raw water on the raw water side in the filter device 1 is replaced with pure water, the raw water side of the filter device 1 is left standing in pure water, and when the user does not take water into the water purifier, the rising speed of the Total Dissolved Solids (TDS) of pure water stored in the filter device 1 is slow with the passage of time, and the Total Dissolved Solids (TDS) of the first cup of pure water flowing out when the water purifier starts to be used can be effectively reduced as compared with the case of not being washed.

In a second embodiment, fig. 2 is a schematic water path diagram of flushing in the second embodiment of the invention, as shown in fig. 2, the water purifier includes a filtering device 1 having a raw water port 13, a pure water port 11 and a concentrate port 12, an open/close valve 35 is communicated with the raw water port 13, a water source is communicated with the concentrate port 12, and the pure water supply device 2 can be communicated with the concentrate port 12 in the raw water side, specifically, the communication and disconnection of the two can be controlled by a first switch device 31. When the filter device needs to be flushed, the on-off valve 35 is opened, raw water from the water source is made to flow from the raw water port 13 through the filter device 1 from the concentrate port 12 of the filter device 1, and then is directly discharged from the on-off valve 35 in the opened state. When the preset condition is met, the raw water is stopped to flush the filter device 1, and the pure water supply device 2 is communicated with the concentrate port 12, so that the pure water in the pure water supply device 2 flows in from the concentrate port 12, flows out from the raw water port 13, and is discharged through the open/close valve 35 in an open state.

In a third embodiment, fig. 3 is a schematic water path diagram of flushing in the third embodiment of the invention, as shown in fig. 3, the water purifier includes a filtering device 1 having a raw water port 13, a pure water port 11 and a concentrate port 12, two on-off valves 35, one on-off valve 35 is communicated with the raw water port 13, the other on-off valve 35 is communicated with the concentrate port 12, a water source is communicated with the concentrate port 12, and a pure water supply device 2 can be communicated with the concentrate port 12 in the raw water side, specifically, the communication and disconnection of the two can be controlled by a first switch device 31. When the filter device 1 needs to be flushed, the on-off valve 35 communicated with the concentrate port 12 is opened, raw water of a water source is made to flow out from the concentrate port 12 through the filter device 1 from the raw water port 13 of the filter device 1, and then is directly discharged from the on-off valve 35 communicated with the concentrate port 12 in the opened state. When the preset condition is met, the raw water is stopped from being used for washing the filtering device 1, the opening and closing valve 35 communicated with the raw water port 13 is opened to be in an open state, the opening and closing valve 35 communicated with the concentrated water port 12 is closed, and the pure water supply device 2 is further communicated with the concentrated water port 12, so that pure water in the pure water supply device 2 flows in from the concentrated water port 12, flows out from the raw water port 13 and is discharged through the opening and closing valve 35 communicated with the raw water port 13 in the open state. In the present embodiment, when the filter device 1 needs to be flushed, the opening/closing valve 35 communicating with the raw water port 13 is opened, and raw water from the water source is allowed to flow from the raw water port 13 through the filter device 1 from the concentrate port 12 of the filter device 1 by passing through the filter device 1, and then directly discharged from the opening/closing valve 35 communicating with the raw water port 13 in the opened state. When the preset condition is met, the raw water is stopped from being used for washing the filtering device 1, the opening and closing valve 35 communicated with the thick water port 12 is opened to be in an open state, the opening and closing valve 35 communicated with the raw water port is closed, and the pure water supply device 2 is further communicated with the raw water port 13, so that pure water in the pure water supply device 2 flows in from the raw water port 13, flows out from the thick water port 12 and is discharged through the opening and closing valve 35 communicated with the thick water port 12 in the open state.

Fig. 4 is a schematic structural diagram of a water purifier according to an embodiment of the present invention, and as shown in fig. 4, the filtering device 1 includes a raw water port 13, a pure water port 11, and a concentrated water port 12, and is configured to filter a fluid flowing in from the raw water port 13, flow out from the pure water port 11 after filtering, and discharge concentrated water from the concentrated water port 12 of the filtering device 1. The filtering device 1 comprises one of a reverse osmosis membrane filtering device and a nanofiltration membrane filtering device. The raw water port 13 of the filtering device 1 is connected with a water pump 5, a third switch device 34, a carbon rod filter element 6, a PP cotton filter element 7, a preposed filter element 8 and a water inlet ball valve connected with a water source in sequence. The PP cotton filter element 7 and the carbon rod filter element 6 are used for filtering pollutants in the fluid, and the particle size level of the filtered pollutants is smaller than that of the pollutants filtered by the front filter element 8. The third switch device 34 is used for controlling the on-off of the pipeline between the carbon rod filter element 6 and the water pump 5. The water pump 5 is used for pressurizing and delivering the fluid in the pipeline to the raw water port 13 of the filter device 1, and is used for ensuring the pressure in the pipeline, so that the filter device 1 can filter the fluid in the pipeline under the action of sufficient pressure. Meanwhile, the water pump 5 may be a diaphragm pump, and when the water pump 5 is in an off state, fluid can also flow through the water pump 5.

The concentrate inlet 12 of the filter device 1 can be connected with a waste water ratio device 4. The waste water is used for controlling the pressure of the dense water inlet 12 of the filtering device 1 than the device 4, so that a reasonable pressure difference exists in the filtering device 1, the filtering function of the filtering device 1 is guaranteed, meanwhile, the pressure difference in the filtering device 1 can be adjusted, and the filtered volume flow of the filtering device 1 is controlled, namely the pressure difference is larger, and the filtered volume flow of the filtering device 1 is larger. The wastewater ratio device 4 may be connected to the concentrate port 12 of the filter device 1 alone, or a rapid drain path may be connected in parallel to the wastewater ratio device 4 of the water purifier, and an on-off valve 35 may be provided on the rapid drain path. The pure water supply device comprises a water storage device 2, and the water storage device 2 can be communicated with the pure water port 11 so that the pure water flowing out of the filtering device 1 flows into the water storage device 2 for storage.

The water storage device 2 is provided with a partition 23, the partition 23 divides the interior of the water storage device 2 into a first chamber 21 and a second chamber 22 which are isolated from each other, and the partition 23 can adjust the size of the first chamber 21 and the second chamber 22. The first chamber 21 of the water storage device 2 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 switch device 31 is provided between the first chamber 21 and the raw water port 13, and a second switch device 32 is provided between the first chamber 21 and the pure water port 11. The partition 23 may be a balloon having a second chamber 22 therein, the balloon being filled with a gas. The partition 23 may also be in close contact with the side wall of the water storage means 2 so that the second chamber 22 forms a closed space, and the second chamber 22 stores air therein. The second chamber 22 may be formed by the partition 23 together with the side wall of the water storage means 2, or may be formed by the partition 23 alone. The partition 23 may in particular be a flexible membrane or may be a substance, for example rubber-like, with a certain amount of elasticity, depending on whether the air stored in the second chamber 22, after compression, can provide sufficient pressure to force pure water stored in the first chamber 21 out of the cleaning filter device 1. The first chamber 21 can communicate with the raw water port 13 and the purified water port 11, respectively. A first switch device 31 is provided between the first chamber 21 and the raw water port 13, and a second switch device 32 is provided between the first chamber 21 and the pure water port 11. After the user of purifier uses water end 10 to stop, water pump 5 continues the operation, and first cavity 21 and pure water mouth 11 are in the connected state, and first cavity 21 and former water port 13 are in the disconnected state, and the pure water that flows out from pure water mouth 11 of filter equipment 1 flows into water storage device 2's first cavity 21, because the pure water that pure water mouth 11 flows out has certain pressure, at this moment, separator 23 receives the compression, and first cavity 21 increases in size, and the second cavity 22 reduces in size, and then first cavity 21 accomplishes the water storage. When the second preset condition is satisfied, the second switch device 32 is closed to control the direction from the first chamber 21 to the pure water port 11 to be in a non-connection state, the first switch device 31 is kept in a disconnection state to make the space between the first chamber 21 and the raw water port 13 be in a disconnection state, and the switch valve 35 is opened to make the raw water flow from the raw water port 13 of the filter device 1 through the filter device 1 and flow out from the thick water port 12. In the second or third embodiment, raw water is made to flow from the concentrate inlet 12 of the filter device through the filter device 1 and out of the raw water inlet 13. The second preset condition at least comprises one of the following conditions: the pressure in the pipeline of the water purifier meets a preset value, the liquid level in the first chamber 21 meets a preset value, the second preset time and the current of the water pump meet preset values.

When a preset condition is met, the third switch device 34 is closed, the first switch device 31 is opened, so that the first chamber 21 is communicated with the raw water port 13, and pure water in the first chamber 21 flows into the raw water port 13. Under the effect of the inside gas pressure of second chamber 22, separator 23 will be with the pure water extrusion first chamber 21 in the first chamber 21 for the pure water flows into filter equipment 1's former water gap 13, thereby the pure water washs in filter equipment 1, will stop and wash away the discharge at the thick water of former water side in filter equipment 1, effectively reduces the Total Dissolved Solids (TDS) of the first cup of pure water that the purifier flowed out when beginning to use.

In other embodiments, fig. 5 is a schematic structural diagram of an embodiment of a water storage device of a water purifier in an embodiment of the invention, as shown in fig. 5, a first chamber 21 with adjustable volume is arranged inside the water storage device 2, the first chamber 21 of the water storage device 2 has a first opening and a second opening, the first opening is connected with the raw water port 13 of the filtering device 1, and the second opening is connected with the pure water port 11 and the user water end 10. A first switch device 31 is provided between the first chamber 21 and the raw water port 13, and a second switch 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 2 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 2 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, and of course, the solenoid valves may be used in combination with the check valves 39 in order to prevent the reverse flow. In one embodiment, the water storage device 2 has an elastic member 24 therein for adjusting the volume of the first chamber 21. The elastic member 24 may be a film having a relatively high elasticity, and may be made of rubber, epdm, neoprene, or the like. In another embodiment, the water storage device 2 has a partition 23 therein, the partition 23 separates the interior of the water storage device 2 into a first chamber 21 and a second chamber 22 which are isolated from each other, and the partition 23 can adjust the size of the first chamber 21 and the second chamber 22. The first chamber 21 of the water storage device 2 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. 6 is a schematic structural diagram of an embodiment of a water storage device of a water purifier in an embodiment of the invention, as shown in fig. 6, the second chamber 22 can be communicated with a water source or a gas source, so that gas 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 gas source can be a gas cylinder with higher pressure. In the above structure, especially when the second chamber 22 is communicated with the tap water source, the tap water source not only provides raw water for the water purifier, but also provides a pressure meeting the requirement for the second chamber 22, and the pressure can ensure that the pure water stored in the first chamber 21 is pressed out, so as to clean the filtering device 1. In the above embodiment, the second chamber 22 may also not be in communication with a water or air source. For example, when the spacer 23 is a piston, an elastic 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 a connected state with the pure water port 11, the first chamber 21 is in a disconnected state 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 is reduced, and the volume of the first chamber 21 is increased to store the flowing pure water. When the water purifier needs pure water for cleaning, the first chamber 21 is disconnected from the pure water port 11 and the first chamber 21 is communicated with the raw water port 13 by the first switch device 31 and the second switch device 32. At this time, the spring in the second chamber 22 pushes the piston to slide, the volume of the second chamber 22 increases, the volume of the first chamber 21 decreases to press out the pure water stored therein, and the pure water is made to flow into the raw water port 13 of the filter device 1 to be cleaned by the spring. In another embodiment, fig. 7 is a schematic structural diagram of an embodiment of a water storage device of a water purifier in an embodiment of the invention, as shown in fig. 7, a partition 23 is provided in the water storage device 2, the partition 23 partitions the interior of the water storage device 2 into a first chamber 21 and a second chamber 22 which are isolated from each other, and the partition 23 can adjust the size of the first chamber 21 and the size of the second chamber 22. The first chamber 21 of the water storage device 2 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 means 2 may be in communication with the outside to ensure the air pressure inside it. A first switch device 31 is provided between the first chamber 21 and the raw water port 13, and a second switch device 32 is provided between the first chamber 21 and the pure water port 11. A first electromagnet 36 is arranged on the partition 23, and a second electromagnet 37 opposite to the first electromagnet 36 is arranged in the second chamber 22, so that the volume of the first chamber 21 is increased or reduced under the action of the first electromagnet 36 and the second electromagnet 37. After the user water end 10 of the water purifier is opened, the water pump 5 is operated, the first chamber 21 and the pure water port 11 are in a communicated state, the first chamber 21 and the raw water port 13 are in a disconnected state, 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 2, in order to avoid that the water storage device 2 stores water and influences the water yield of the user water end 10, the first electromagnet 36 and the second electromagnet 37 are controlled to repel each other, the isolating piece 23 moves, so that the first chamber 21 is reduced, and the second chamber 22 is enlarged. After the water end 10 of the water purifier stops using water, the water pump 5 continues to operate, the first electromagnet 36 and the second electromagnet 37 are controlled to attract each other, the partition 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 is complete, the second switching device 32 may be closed. When pure water is needed for cleaning, the first chamber 21 and the pure water port 11 are in a disconnected state, the first chamber 21 and the raw water port 13 are in a connected state, the first electromagnet 36 and the second electromagnet 37 are controlled to repel each other, the partition 23 moves, so that the first chamber 21 becomes smaller, the second chamber 22 is enlarged, and therefore pure water stored in the first chamber 21 is pressed out and flows into the filtering device 1, and the filtering device 1 is cleaned. The concentrated water staying at the raw water side of the filtering membrane in the filtering device 1 is flushed and discharged, and the Total Dissolved Solids (TDS) of the first cup of pure water flowing out when the water purifier starts to be used is effectively reduced.

Further, as shown in fig. 4, a filter material may be disposed in the first chamber 21. 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 13 of the filter device 1. Meanwhile, the fourth chamber 212 communicates with the user water using end 10. The first chamber 21 of the water storage device 2 is connected in series between the pure water port 11 of the filtering device 1 and the water end 10 of the user, so that the pure water flowing out of the pure water port 11 of the filtering device 1 reaches the water end 10 of the user every time, the pure water must flow through the first chamber 21 of the water storage device 2, and thus, the water capable of being stored in the first chamber 21 of the water storage device 2 is the running water, and in the process of long-term use, impurities generated by accumulation or bacteria breeding are difficult to accumulate in the first chamber 21 of the water storage device 2, so that the quality of the pure water when the water storage device 2 washes the filtering device 1 is ensured, and the quality of the water used by the water end 10 of the user is finally ensured. Secondly, when the user stops using water at the water end 10 (closes), the water pump 5 will continue to work for a while, and by the above manner and after the user stops using water at the water end 10, the water storage device 2 is stored with pure water for cleaning the filtering device 1, and due to the limitation of the filtering device 1, the flow rate per unit time of pure water is limited, and under a normal state, the water storage device can only meet the requirements of the user, so that a user who is not very patience can complain that the water yield is too small, the waiting time for pouring a cup of water is too long, or when the water preparation of the water purifier is started, the pure water can be discharged after waiting for several seconds. If the water storage device 2 stores pure water when the user uses the water end 10 to receive water, the diverted pure water will cause less pure water to flow out of the user using the water end 10, which will seriously affect the user experience. Therefore, in the water purifier, the pure water stored in the water storage device 2 for flushing is arranged after the user water end 10 stops using water, so that the situation that the outlet water of the user water end 10 is reduced can be avoided.

In the above embodiment, after the user stops using the water end 10, the water pump 5 continues to operate to make the water storage device 2 store water, and when the preset stop condition is reached, the water pump 5 stops operating, which indicates that the water storage device 2 has finished storing water. The preset stop condition includes at least one of the following: the pressure in the pipeline of the water purifier meets a preset value, the liquid level in the first chamber 21 meets a preset value, the second preset time and the current of the water pump 5 meet preset values. After water storage device 2 stores the full water, at this moment, because water pump 5 continues to work, pressure can further rise in the pipeline, so when the pressure in the purifier pipeline satisfies the default, can stop water pump 5 work. In another mode, after the water storage device 2 is full of water, that is, the liquid level in the first chamber 21 in the water storage device 2 may meet a preset value, a detection device for the liquid level may be disposed in the first chamber 21 to detect whether the liquid level in the first chamber 21 meets the preset value, and if so, the water pump 5 is stopped. In another mode, after the water storage device 2 is full of water, at this time, since the water pump 5 continues to operate, but the water pump 5 cannot input water into the water storage device 2, at this time, the current of the water pump 5 is changed, and after the change (indicating that the water storage device 2 is full of water), when it is detected that the current of the water pump 5 satisfies a preset value, the operation of the water pump 5 is stopped.

When the user stops using the water end 10 and the water storage device 2 is full of water, the water purifier can determine when to enter the cleaning state. In an alternative embodiment, when the water storage device 2 is full of water, the water purifier enters a cleaning state immediately, and the filtering device 1 is cleaned to the maximum extent. In order to avoid the excessive cleaning times of the filtering device 1 and the water waste, the water purifier may enter the cleaning state when the duration of the water end 10 closed by the user exceeds the first preset cleaning duration. For example, the first preset cleaning time can be set to 12 hours, and generally speaking, after the filtering device 1 is cleaned by pure water in the water storage device 2, the total dissolved solids of water inside the filtering device 1 in a certain time can not rise obviously, so that the total dissolved solids when the water just flows out of the water purifier can be effectively reduced by setting the reasonable first preset cleaning time, and the waste of water resources caused by too many times of cleaning can be avoided.

Since the user may not use water for a long time at the water using end 10, the water storage device 2 has no opportunity to store water after the filtering device 1 is washed last time. Therefore, when the duration of the user's water end 10 closing exceeds the second preset cleaning duration, the water purifier starts the water pump 5 to make the first chamber 21 store water and enter a cleaning state; and the second preset cleaning time is longer than the first preset cleaning time.

When the water end 10 of the user has no water for a longer time, for example, the user is not using the water purifier for a long time while on business trip, the water purifier enters a standby state after the non-use time of the water purifier reaches a preset standby time, and in the standby state, the water purifier does not clean the filtering device 1. In the above situation, as shown in fig. 5, the water purifier further includes a fourth switch device 38 disposed between the user water end 10 and the water storage device 2, when the duration of the user water end 10 closing exceeds the preset standby time, the user water end 10 is opened (the user uses the water purifier again), and since the water purifier is not used for a long time, the water purifier needs to perform the water storage operation on the water storage device 2 and clean the filtering device 1. The operation of the water purifier is as follows, the water purifier closes the fourth switching device 38, and turns on the water pump 5 to enable the first chamber 21 to store water, and enters a cleaning state; after the water purifier finishes the cleaning state, the fourth switch device 38 is turned on, so that the water purifier can provide pure water to the water using end 10 of the user; wherein the preset standby time is longer than the second preset cleaning time. In the above case, the water purifier may be further provided with a display screen, and when the user opens the water end 10 without water flowing out, the display screen may display a caption such as "cleaning in progress, please slightly" or the like to inform the user that the water purifier is performing the cleaning operation without water flowing out.

Above-mentioned purifier can wash filter equipment 1 according to the in service behavior of user's reality to the purifier, so, the Total Dissolved Solids (TDS) of first cup of pure water when effectively reducing the purifier under the washing number of times as far as possible goes out water, under the prerequisite of using water wisely, reduces to wash repeatedly for a long time and causes the harm to filter equipment 1, and then increases the life of purifier.

Fig. 8 is a schematic structural diagram of a water purifier in an embodiment of the present invention, in a first embodiment, as shown in fig. 8, the applicant proposes a water purifier in the present application, including: a reverse osmosis membrane device a1 having a raw water port a13, a pure water port a11, and a concentrate water port a 12; a water pump a5 in communication with the raw water port a13 of the reverse osmosis membrane unit a1 to drive water through the reverse osmosis membrane unit a 1; a water storage device A2, wherein the water storage device A2 is internally provided with a first chamber A21 with adjustable volume; the first chamber A21 is connected in series between the pure water port A11 and the user water end A10 of the reverse osmosis membrane device A1; when the user stops using the water end A10, the water pump A5 continues to work, so that the reverse osmosis membrane device A1 continues to generate pure water; under the pressure provided by the water pump a5, the volume of the first chamber a21 is increased, and pure water is stored for cleaning of the reverse osmosis membrane device a 1; the water purifier has a cleaning state and a water production state: in the cleaning state, the first chamber a21 is disconnected from the pure water port a11, the first chamber a21 is communicated with the raw water port a13, and pure water in the first chamber a21 flows in from the raw water port a13 of the reverse osmosis membrane device a1 and is discharged from the concentrate port a12 of the reverse osmosis membrane device a 1; in the water making state, the first chamber A21 is communicated with the pure water port A11, and pure water generated by the reverse osmosis membrane device A1 reaches the user water end A10 after passing through the first chamber A21.

When the water purifier is in a daily starting state, when a water end A10 for a user is opened, the water purifier is in a water production state, a first chamber A21 of a water storage device A2 is communicated with a pure water port A11, a water pump A5 is opened, water of a water source (tap water) is pressurized and then conveyed to a reverse osmosis membrane device A1 in the water purifier under the driving of the water pump A5, the reverse osmosis membrane device A1 in the water purifier can filter water flowing in from a raw water port A13 into pure water, the pure water flows out from a pure water port A11, and concentrated water is discharged from a concentrated water port A12. Since the first chamber a21 of the water storage apparatus a2 is connected in series between the pure water port a11 of the reverse osmosis membrane apparatus a1 and the user water end a10, the pure water flowing out of the pure water port a11 of the reverse osmosis membrane apparatus a1 flows into the first chamber a21 of the water storage apparatus a2, and since the user water end a10 is in an open state and the pressure is low, the first chamber a21 of the pure water flowing out of the water storage apparatus a2 preferentially flows to the user water end a10, it is difficult to increase the volume of the first chamber a21 inside the water storage apparatus a2, and it is difficult to store a large amount of pure water in the first chamber a21 of the water storage apparatus a 2. When the user stops using the water end A10 (is closed), the water pump A5 continues to work for a period of time, so that the reverse osmosis membrane device A1 can continue to produce pure water; pure water flowing out of the pure water port a11 of the reverse osmosis membrane device a1 under the pressure provided by the water pump a5 while the user is in a closed state with the water port a10 causes the volume of the first chamber a21 to increase to store the pure water for cleaning of the reverse osmosis membrane device a 1. After the volume of the first chamber a21 of the water storage device a2 is increased and pure water is stored, the water purifier may enter a cleaning state, in the cleaning state, the first chamber a21 of the water storage device a2 is disconnected from the pure water port a11, the first chamber a21 is communicated with the raw water port a13, so that the pure water stored in the water storage device a2 is discharged to the raw water port a13 of the reverse osmosis membrane device a1, the part of the pure water flows into the reverse osmosis membrane device a1 from the raw water port a13 of the reverse osmosis membrane device a1, and then the reverse osmosis membrane in the reverse osmosis membrane device a1 is flushed, so that the concentrated water on the raw water side of the reverse osmosis membrane is flushed and replaced by the pure water, and the flushed pure water flows out from the concentrated water port a12 of the reverse osmosis membrane device a 1. So, be in not using the in-process at the purifier, reverse osmosis membrane's both sides are the pure water, and in the longer time, the Total Dissolved Solids (TDS) of reverse osmosis membrane pure water side can not become high. Therefore, when the water purifier is in the water production state again, the Total Dissolved Solids (TDS) of the first cup of pure water flowing out of the water purifier when the water purifier is used is effectively reduced. Fig. 9 is a comparison graph of Total Dissolved Solids (TDS) of the outlet water of the water purifier according to the present invention and a common water purifier without a water storage device a2 after a shutdown time a2 hours, as shown in fig. 9, the Total Dissolved Solids (TDS) of the input tap water (raw water) is higher, and when the water purifier is shutdown for a2 hours, the water purifier is turned on, and the Total Dissolved Solids (TDS) of the purified water filtered from the raw water of the water purifier are all reduced. The Total Dissolved Solids (TDS) of the purified water from the conventional water purifier without the water reservoir a2 was significantly higher than the Total Dissolved Solids (TDS) of the purified water from the water purifier of the present invention within about a30 second from the beginning of the water discharge. As can be shown in the comparative experiment, the water purifier effectively reduces the Total Dissolved Solids (TDS) of the flowing pure water which is used again after the water purifier stops for a period of time. Meanwhile, the first chamber a21 of the water storage device a2 is connected in series between the pure water port a11 of the reverse osmosis membrane device a1 and the user water end a10, so that when the pure water flowing out of the pure water port a11 of the reverse osmosis membrane device a1 reaches the user water end a10 each time, the pure water must flow through the first chamber a21 of the water storage device a2, and thus, the water capable of being stored in the first chamber a21 of the water storage device a2 is the running water, and in the process of long-term use, impurities or bacteria are difficult to accumulate in the first chamber a21 of the water storage device a2, so that the quality of the pure water when the reverse osmosis membrane device a1 is further washed by the water storage device a2 is ensured, and finally the quality of the water used by the user water end a10 is ensured. Secondly, when the user stops using water at the water end a10 (turns off), the water pump a5 will continue to operate for a while, and by the above manner and after the user stops using water at the water end a10, the water storage device a2 will store the pure water for cleaning the reverse osmosis membrane device a1, because of the limitation of the reverse osmosis membrane device a1, the flow rate per unit time of the pure water is limited, and under the normal state, the user can only barely meet the requirement of the user, and many users who are not patience can complain that the water output is too small, the time for waiting for pouring a cup of water is too long, or when the water production water purification machine is started, the pure water can be discharged after waiting for several seconds. If the water storage device a2 stores pure water when the user uses the water end a10 to collect water, the diverted pure water will cause less pure water to flow out of the user's water end a10, which will seriously affect the user experience. Therefore, the water storage device A2 in the water purifier stores pure water for flushing after the user water end A10 stops using the pure water, so that the situation that the outlet water of the user water end A10 is reduced can be avoided.

The water purifier of the present invention will be further explained and illustrated. As shown in fig. 8, the reverse osmosis membrane device a1 includes a raw water port a13, a pure water port a11, and a concentrated water port a12, and filters fluid flowing in from the raw water port a13, and the filtered fluid flows out from the pure water port a11, and concentrated water is discharged from the concentrated water port of the reverse osmosis membrane device a 1. A water pump A5, a third switch device A34, a carbon rod filter element A6, a PP cotton filter element A7, a preposed filter element A8 and a water inlet ball valve connected with a water source are sequentially connected with a raw water port A13 of the self-reverse osmosis membrane device A1. PP cotton cartridge a7 and carbon rod cartridge a6 were used to filter contaminants in the fluid where the particle size level of the filtered contaminants was less than the particle size level of the contaminants filtered by pre-cartridge A8. The third switch device A34 is used for controlling the on-off of the pipeline between the carbon rod filter element A6 and the water pump A5. The water pump A5 is used for pressurizing and delivering the fluid in the pipeline to the raw water port A13 of the reverse osmosis membrane device A1, and is used for ensuring the pressure in the pipeline, so that the reverse osmosis membrane device A1 can filter the fluid in the pipeline under the action of sufficient pressure. Also, the water pump A5 may be a diaphragm pump, and fluid may also flow through the water pump A5 when the water pump A5 is in an off state.

The concentrate inlet a12 of the reverse osmosis membrane apparatus a1 may be connected to a waste water ratio apparatus a 4. Waste water ratio device A4 is used for controlling reverse osmosis membrane device A1 dense mouth A12's pressure, and then makes reverse osmosis membrane device A1 inside have a reasonable pressure differential, guarantees reverse osmosis membrane device A1's filtering capability, simultaneously, can also adjust the inside pressure differential of reverse osmosis membrane device A1, and then control reverse osmosis membrane device A1 to the filterable volume flow of fluid, and pressure differential is the bigger promptly, and reverse osmosis membrane device A1 is the filterable volume flow of fluid is bigger. The wastewater ratio device A4 can be connected with the concentrate inlet A12 of the reverse osmosis membrane device A1 independently, or a rapid drainage channel can be connected in parallel with the wastewater ratio device A4 of the water purifier, and a fourth switch device A35 is arranged on the rapid drainage channel. When the water purifier is in a cleaning state, pure water discharged from the first chamber a21 flows in from the raw water port a13 of the reverse osmosis membrane device a1, and the pure water first flushes the reverse osmosis membrane device a1, is discharged from the concentrate water port a12 of the reverse osmosis membrane device a1, and further flows through the wastewater ratio device a 4. While flowing through the waste water ratio device a4, pure water also flushes the waste water ratio device a4, so that the original concentrated water in the waste water ratio device a4 is flushed away by the pure water. Through the mode, the water storage device A2 stores pure water to flush the reverse osmosis membrane device A1, so that the service life of a reverse osmosis membrane in the reverse osmosis membrane device A1 is effectively prolonged, meanwhile, the pure water flowing out of the thick water port A12 of the reverse osmosis membrane device A1 can flush the wastewater ratio device A4 in the water purifier, and the service life of the wastewater ratio device A4 is prolonged. When the wastewater ratio device A4 is not required to be flushed, the fourth switching device A35 can be opened, the water purifier is flushed quickly, and water discharged from the concentrated water port A12 is directly discharged from the quick water discharge channel.

The water storage device a2 has a first chamber a21 with adjustable volume inside, the first chamber a21 of the water storage device a2 has a first opening and a second opening, the first opening is connected with the raw water port a13 of the reverse osmosis membrane device a1, and the second opening is connected with the pure water port a11 and the user water port a 10. A first switch device a31 is provided between the first chamber a21 and the raw water port a13, and a second switch device a32 is provided between the first chamber a21 and the pure water port a 11. The first switch device a31 and the second switch device a32 are used for controlling the on-off between the first chamber a21 of the water storage device a2 and the raw water port a13 of the reverse osmosis membrane device a1 and between the first chamber a21 of the water storage device a2 and the pure water port a11 of the reverse osmosis membrane device a 1. For example, the first and second switching devices a31 and a32 may be solenoid valves, and of course, in order to prevent reverse flow, the solenoid valves may be used in combination with the check valve a 39. In one embodiment, as shown in fig. 8, the water storage device a2 has an elastic member a24 therein for adjusting the volume of the first chamber a 21. The elastic member a24 may be a film with strong elasticity, and may be made of rubber, epdm, neoprene, etc. When the user of the water purifier stops using the water end a10, the water pump a5 continues to operate, and pure water flowing out of the pure water port a11 flows into the first chamber a21, and at this time, the volume of the first chamber a21 becomes large to store pure water for rinsing because of the strong elasticity of the partition a23a 23. When a certain degree is reached, the first chamber a21 may be disconnected from the pure water port a11 by the second switch device a 32. The water purifier may then enter a cleaning state in which the first chamber a21 is disconnected from the pure water port a11 and the first chamber a21 is communicated with the raw water port a13 by the first switching device a31 and the second switching device. Because the partition member a23 has strong elasticity, after the first chamber a21 is communicated with the raw water port a13, the pure water stored in the first chamber a21 is pressed out under the elastic action of the partition member a23, so that the pure water stored in the first chamber a21 flows into the raw water port a13 of the reverse osmosis membrane device a1, and the reverse osmosis membrane device a1 is cleaned by the pure water.

In another embodiment, fig. 10 is a schematic structural diagram of a water purifier in an embodiment of the present invention under a second embodiment, as shown in fig. 10, a water storage device a2 has a partition a23 therein, the partition a23 partitions the interior of the water storage device a2 into a first chamber a21 and a second chamber a22 which are isolated from each other, and the partition a23 can adjust the sizes of the first chamber a21 and the second chamber a 22. The first chamber a21 of the water storage device a2 has a first opening connected to the raw water port a13 of the reverse osmosis membrane device a1 and a second opening connected to the pure water port a11 and the user water port a 10. The isolator a23 may be a piston or a diaphragm having flexibility. Additionally, the second chamber A22 can be in communication with a water or gas source, which can allow gas or liquid to be pumped into the second chamber A22 to provide a source of power for increasing the volume of the second chamber A22. Wherein the water source can be tap water and the gas source can be a gas cylinder with higher pressure.

In the above structure, especially when the second chamber a22 is communicated with the tap water source, the tap water source not only provides raw water for the water purifier, but also provides a pressure meeting the requirement for the second chamber a22, and the pressure can ensure that the pure water stored in the first chamber a21 is pressed out, so as to clean the reverse osmosis membrane device a 1. A first switch device a31 is provided between the first chamber a21 and the raw water port a13, and a second switch device a32 is provided between the first chamber a21 and the pure water port a 11. A first control switch A33 is arranged between the second chamber A22 and a water source or an air source. To facilitate automated control, the first switch device a31, the second switch device a32, and the first control switch a33 may be solenoid valves. When the water purifier is stopped by the user at the water end A10, the water pump A5 continues to work, the first control switch A33 is turned on, and the pure water flowing out of the pure water port A11 is pressed into the first chamber A21, at the moment, because the isolating piece A23 is a piston or a flexible film, the volume of the first chamber A21 is increased, the volume of the second chamber A22 is decreased, and then a certain amount of pure water is stored in the first chamber A21. Thereafter, when the pure water stored in the first chamber a21 meets the requirement, the first chamber a21 may be disconnected from the pure water port a11 by the second switching device a32, and the first control switch a33 may be turned off. When the water purifier is in a cleaning state, the first chamber a21 is in a disconnected state from the pure water port a11 and the first chamber a21 is in a connected state with the raw water port a13 by the first switch device a31 and the second switch device a 32. At the same time, the first control switch A33 is opened to connect the second chamber A22 with a water or air supply. Since the gas or liquid in the water or gas source fills the second chamber a22 and forces the barrier a23, pushing the barrier a23, eventually causing the volume of the second chamber a22 to increase and the volume of the first chamber a21 to decrease. As the volume of the first chamber a21 is reduced, a part of the pure water in the first chamber a21 is pressed out by the pressure of the gas source or the water source, and the pure water flows into the raw water port a13 of the reverse osmosis membrane device a1, so that the reverse osmosis membrane device a1 is cleaned by the pure water. So, be in not using the in-process at the purifier, reverse osmosis membrane's both sides are the pure water. When the purifier is in the use again, can effectively reduce the Total Dissolved Solids (TDS) of the first cup of pure water that the purifier flowed out when beginning to use.

In the above embodiment, the second chamber a22 may not be in communication with a water or air source. For example, when the spacer a23 is a piston, an elastic member a24, such as a spring, may be disposed in the second chamber a 22. When the user of the water purifier stops using the water end A10, the water pump A5 continues to work, the first chamber A21 is communicated with the pure water port A11, the first chamber A21 is disconnected from the raw water port A13, pure water flowing out of the pure water port A11 is pressed into the first chamber A21, at the moment, the spring in the second chamber A22 contracts, the piston slides, the volume of the second chamber A22 is reduced, and the volume of the first chamber A21 is increased to store the flowing pure water. When the water purifier is in a cleaning state, the first chamber A21 and the pure water port A11 are in a disconnected state and the first chamber A21 and the raw water port A13 are in a connected state through the first switching device A31 and the second light-turning device. At this time, the spring in the second chamber a22 pushes the piston to slide, the volume of the second chamber a22 increases, the volume of the first chamber a21 decreases to press out the pure water stored therein, and the pure water is caused to flow into the raw water port a13 of the reverse osmosis membrane apparatus a1 by the spring to be cleaned.

In another embodiment, fig. 11 is a schematic structural diagram of a water purifier in an embodiment of the present invention under a third embodiment, as shown in fig. 11, a water storage device a2 has a partition a23 therein, the partition a23 partitions the interior of the water storage device a2 into a first chamber a21 and a second chamber a22 which are isolated from each other, and the partition a23 can adjust the sizes of the first chamber a21 and the second chamber a 22. The first chamber a21 of the water storage device a2 has a first opening connected to the raw water port a13 of the reverse osmosis membrane device a1 and a second opening connected to the pure water port a11 and the user water port a 10. A first switch device a31 is provided between the first chamber a21 and the raw water port a13, and a second switch device a32 is provided between the first chamber a21 and the pure water port a 11. The partition a23 may be an air bag with a second chamber a22 inside, which is inflated with gas. The partition a23 may also be in sealed contact with the side wall of the water storage device a2 so that the second chamber a22 forms a sealed space in which air is stored in the second chamber a 22. The second chamber a22 is formed by the partition a23 and the side wall of the water storage device a2, and the partition a23 may be a flexible diaphragm or a rubber-like substance with certain elasticity, depending on whether the air stored in the second chamber a22 can provide enough pressure after being compressed to make the pure water stored in the first chamber a21 press out of the cleaning reverse osmosis membrane device a 1. The first chamber a21 can communicate with the raw water port a13 and the pure water port a11, respectively. A first switch device a31 is provided between the first chamber a21 and the raw water port a13, and a second switch device a32 is provided between the first chamber a21 and the pure water port a 11. After the user water end a10 of the water purifier stops, the water pump a5 continues to operate, the first chamber a21 is in a communication state with the pure water port a11, the first chamber a21 is in a disconnection state with the raw water port a13, pure water flowing out of the pure water port a11 of the reverse osmosis membrane device a1 flows into the first chamber a21 of the water storage device a2, pure water flowing out of the pure water port a11 has certain pressure, at the moment, the partition member a23 is compressed, the volume of the first chamber a21 is increased, the volume of the second chamber a22 is reduced, and then the first chamber a21 finishes storing water. In the cleaning state, the first chamber a21 is in a disconnected state from the pure water port a11, and the first chamber a21 is in a connected state with the raw water port a 13. Under the effect of the internal gas pressure of the second chamber A22, the partition A23 presses the pure water in the first chamber A21 out of the first chamber A21, so that the pure water flows into the raw water port A13 of the reverse osmosis membrane device A1, the inside of the reverse osmosis membrane device A1 is cleaned by the pure water, the concentrated water staying at the raw water side of the reverse osmosis membrane in the reverse osmosis membrane device A1 is flushed and discharged, and the Total Dissolved Solids (TDS) of the first cup of pure water flowing out when the water purifier starts to be used is effectively reduced.

In another embodiment, fig. 12 is a schematic structural diagram of a water purifier in an embodiment of the present invention under a fourth embodiment, as shown in fig. 12, a water storage device a2 has a partition a23 therein, the partition a23 partitions the interior of the water storage device a2 into a first chamber a21 and a second chamber a22 which are isolated from each other, and the partition a23 can adjust the sizes of the first chamber a21 and the second chamber a 22. The first chamber a21 of the water storage device a2 has a first opening connected to the raw water port a13 of the reverse osmosis membrane device a1 and a second opening connected to the pure water port a11 and the user water port a 10. The second chamber a22 of the water storage means a2 may be in communication with the outside to ensure the air pressure inside. A first switch device a31 is provided between the first chamber a21 and the raw water port a13, and a second switch device a32 is provided between the first chamber a21 and the pure water port a 11. A first electromagnet a36 is arranged on the partition a23, and a second electromagnet a37 opposite to the first electromagnet a36 is arranged in the second chamber a22, so that the volume of the first chamber a21 is increased or decreased under the action of the first electromagnet a36 and the second electromagnet a 37. After a user water end A10 of the water purifier is opened, a water pump A5 is operated, a first chamber A21 is communicated with a pure water port A11, the first chamber A21 is disconnected from a raw water port A13, pure water flowing out of a pure water port A11 of a reverse osmosis membrane device A1 flows into a first chamber A21 of a water storage device A2, in order to avoid the influence on the water yield of the user water end A10 caused by water storage of the water storage device A2, a first electromagnet A36 and a second electromagnet A37 are controlled to repel each other, a partition A23 moves, so that the first chamber A21 is reduced, and the second chamber A22 is increased. After the water end A10 of the user of the water purifier stops using water, the water pump A5 continues to operate, the first electromagnet A36 and the second electromagnet A37 are controlled to attract each other, the partition piece A23 moves, the first chamber A21 becomes large, and the second chamber A22 becomes small, so that the first chamber A21 stores pure water. After storage is complete, the second switch device a32 may be closed. In a subsequent cleaning state, the first chamber a21 is disconnected from the pure water port a11, the first chamber a21 is connected to the raw water port a13, the first electromagnet a36 and the second electromagnet a37 are controlled to repel each other, and the partition a23 moves, so that the first chamber a21 is reduced, the second chamber a22 is increased, and thus, the pure water stored in the first chamber a21 is pressed out and flows into the raw water port a13 of the reverse osmosis membrane device a1, and the reverse osmosis membrane device a1 is cleaned. The concentrated water staying at the raw water side of the reverse osmosis membrane in the reverse osmosis membrane device A1 is flushed and discharged, and the Total Dissolved Solids (TDS) of the first cup of pure water flowing out when the water purifier starts to be used is effectively reduced.

In a preferred embodiment, as shown in fig. 11 and 12, for example, a filter material may be disposed within the first chamber a 21. The first chamber a21 is divided into a third chamber a211 and a fourth chamber a212 by the filter material, the third chamber a211 is communicated with the pure water port a11 of the reverse osmosis membrane device a1, and the fourth chamber a212 is communicated with the raw water port a13 of the reverse osmosis membrane device a 1. Meanwhile, the fourth chamber a212 communicates with the user water end a 10. In this way, the pure water flowing out of the pure water port a11 of the reverse osmosis membrane apparatus a1 must be filtered by the filter material, and then flows into the fourth chamber a212, and finally flows from the fourth chamber a212 to the user water port a 10. Be provided with between filtering material and the separator A23 and carry out spacing setting element to filtering material, avoid filtering material to take place to slide and be close to separator A23, and then avoid influencing the regulation of separator A23 to first cavity A21 and second cavity A22. In the above structure, the filter material may be an activated carbon filter a9, but the type of the filter material is not limited to the above description, and any other filter material that can filter water may be used in the present embodiment.

In the above embodiments, after the user stops using the water end a10, the water pump a5 continues to operate to allow the water storage device a2 to store water, and when the preset stop condition is reached, the water pump a5 stops, indicating that the water storage device a2 has completed storing water. The preset stop condition includes at least one of the following: the pressure in the pipeline of the water purifier meets a preset value, the liquid level in the first chamber A21 meets a preset value, the first preset time and the current of the water pump A5 meet preset values. After the water storage device a2 is full of water, at this time, the pressure in the pipeline will further increase because the water pump a5 continues to work, so when the pressure in the pipeline of the water purifier meets the preset value, the water pump a5 can be stopped. In another mode, after the water storage device a2 is full of water, that is, the liquid level in the first chamber a21 of the water storage device a2 may satisfy the preset value, a liquid level detection device may be disposed in the first chamber a21 to detect whether the liquid level in the first chamber a21 satisfies the preset value, and if so, the water pump a5 is stopped. In another mode, after the water storage apparatus a2 is full of water, at this time, since the water pump a5 is continuously operated, but the water pump a5 cannot input water into the water storage apparatus a2, the current of the water pump a5 is changed, and after the change (indicating that the water storage apparatus a2 is full of water), when the current of the water pump a5 is detected to meet a preset value, the operation of the water pump a5 is stopped.

When the user stops using the water end A10 and the water storage device A2 is full of water, the water purifier can judge when to enter the cleaning state. In an alternative embodiment, after the water storage device a2 is full of water, the water purifier enters a cleaning state immediately, and the reverse osmosis membrane device a1 is cleaned to the maximum extent. In order to avoid the excessive cleaning times of the reverse osmosis membrane device A1 and waste of water, the water purifier can be in a cleaning state when the duration of the water end A10 for the user is closed exceeds a first preset cleaning duration. For example, the first preset cleaning time can be set to 12 hours, in general, after the reverse osmosis membrane device a1 is cleaned by pure water in the water storage device a2, the total dissolved solids of water in the reverse osmosis membrane device a1 in a certain time can not rise obviously, so that the total dissolved solids of the water just discharged from the water purifier can be effectively reduced by setting the reasonable first preset cleaning time, and the waste of water resources caused by too many times of cleaning can be avoided.

Since the user may not use water for a long time at the water end a10, the water storage device a2 has no opportunity to store water after the reverse osmosis membrane device a1 is cleaned last time. Therefore, when the duration of the user water end A10 closing exceeds the second preset cleaning duration, the water purifier starts the water pump A5 to enable the first chamber A21 to store water and enter a cleaning state; and the second preset cleaning time is longer than the first preset cleaning time.

When the water end a10 for the user has no water for a longer time, for example, the user is not using the water purifier for a long time while on business trip, the water purifier enters a standby state after the non-use time of the water purifier reaches a preset standby time, and in the standby state, the water purifier does not clean the reverse osmosis membrane device a 1. In the above situation, as shown in fig. 12, the water purifier further includes a fifth switch device a38 disposed between the user water end a10 and the water storage device a2, when the duration of the user water end a10 being turned off exceeds the preset standby time, the user water end a10 is turned on (the user uses the water purifier again), and since the water purifier is not used for a long time, the water purifier first performs the water storage operation on the water storage device a2 and the cleaning on the reverse osmosis membrane device a 1. The operation of the water purifier is as follows, the water purifier turns off the fifth switch device A38 and turns on the water pump A5 to make the first chamber A21 store water and enter a cleaning state; after the water purifier finishes the cleaning state, the fifth switch device A38 is turned on, so that the water purifier can provide pure water to the water end A10 of the user; wherein the preset standby time is longer than the second preset cleaning time. In the above case, the water purifier may be further provided with a display screen, and when the user opens the water end a10 without any water flowing out, the display screen may display a subtitle such as "cleaning in progress, please slightly" or the like to inform the user that the water purifier is performing the cleaning operation without any pure water flowing out.

Above-mentioned purifier can wash reverse osmosis membrane device A1 according to the in service behavior of user's reality to the purifier, so, the Total Dissolved Solids (TDS) of first cup of pure water when effectively reducing the purifier under the washing number of times as far as possible goes out water, under the prerequisite of using water wisely, reduces to wash repeatedly for a long time and causes the harm to reverse osmosis membrane device A1, and then increases the life of purifier.

In the present application, the applicant also proposes a water purification machine comprising: a reverse osmosis membrane device a1 having a raw water port a13, a pure water port a11, and a concentrate water port a 12; raw water flowing into the reverse osmosis membrane device a1 from the raw water port a13 is filtered by the reverse osmosis membrane device a1 to flow out pure water from the pure water port a11 and concentrated water from the concentrated water port a 12; a water storage device A2, a first chamber A21 with adjustable volume is arranged inside, and the first chamber A21 can be communicated with a pure water port A11; the water purifier has a water storage process that the volume of a first chamber A21 is increased; wherein, the water stored in the first chamber A21 is pure water; when the volume of the first chamber a21 is reduced, pure water flowing out of the first chamber a21 is used to clean the reverse osmosis membrane apparatus a 1.

Fig. 13 is a schematic structural diagram of a water purifier in a fifth embodiment of the present invention, as shown in fig. 13, a water storage device a2 has a first chamber a21 with adjustable volume inside, a first chamber a21 of a water storage device a2 has a first opening, the first opening is connected to a raw water port a13 of a reverse osmosis membrane device a1, and the first opening is connected to a pure water port a11 and a user water port a 10. A first switch device a31 is provided between the first chamber a21 and the raw water port a13, and a second switch device a32 is provided between the first chamber a21 and the pure water port a 11. The first switch device a31 and the second switch device a32 are used for controlling the on-off between the first chamber a21 of the water storage device a2 and the raw water port a13 of the reverse osmosis membrane device a1 and between the first chamber a21 of the water storage device a2 and the pure water port a11 of the reverse osmosis membrane device a 1. For example, the first and second switching devices a31 and a32 may be solenoid valves, and of course, in order to prevent reverse flow, the solenoid valves may be used in combination with the check valve a 39. An activated carbon filter a9 may be provided between the pure water port a11 of the reverse osmosis membrane apparatus a1 and the user water end a 10. In another connection mode of the water storage device a2, as shown in fig. 8, the water storage device a2 has a first chamber a21 with adjustable volume inside, the first chamber a21 of the water storage device a2 has a first opening and a second opening, the first opening is connected with the raw water port a13 of the reverse osmosis membrane device a1, and the second opening is connected with the pure water port a11 and the user water port a 10. A first switch device a31 is provided between the first chamber a21 and the raw water port a13, and a second switch device a32 is provided between the first chamber a21 and the pure water port a 11. The first switch device a31 and the second switch device a32 are used for controlling the on-off between the first chamber a21 of the water storage device a2 and the raw water port a13 of the reverse osmosis membrane device a1 and between the first chamber a21 of the water storage device a2 and the pure water port a11 of the reverse osmosis membrane device a 1.

In the connection manner of the two water storage devices a2, as shown in fig. 8 and 13, the water storage device a2 has an elastic member a24 capable of adjusting the volume of the first chamber a 21. When the user water end A10 of the water purifier stops using water, the water pump A5 continues to work, and the second switch device A32 is turned on. The pure water flowing out from the pure water port a11 flows into the first chamber a21, and at this time, since the partition a23a23 has strong elasticity, the volume of the first chamber a21 becomes large to store the pure water for cleaning. When a certain degree is reached, the first chamber a21 may be disconnected from the pure water port a11 by the second switch device a 32. The water purifier may then enter a cleaning state in which the first chamber a21 is disconnected from the pure water port a11 and the first chamber a21 is communicated with the raw water port a13 by the first switching device a31 and the second switching device. Because the partition member a23 has strong elasticity, after the first chamber a21 is communicated with the raw water port a13, the pure water stored in the first chamber a21 is pressed out under the elastic action of the partition member a23, so that the pure water stored in the first chamber a21 flows into the raw water port a13 of the reverse osmosis membrane device a1, and the reverse osmosis membrane device a1 is cleaned by the pure water. Fig. 14 is a schematic structural view of a water purifier in a sixth embodiment of the present invention, as shown in fig. 12 and 14, a water storage device a2 has a partition a23 therein, the partition a23 partitions the interior of the water storage device a2 into a first chamber a21 and a second chamber a22 which are isolated from each other, and the partition a23 can adjust the sizes of the first chamber a21 and the second chamber a 22. The isolator a23 may be a piston or a diaphragm having flexibility. Additionally, the second chamber A22 can be in communication with a water or gas source, which can allow gas or liquid to be pumped into the second chamber A22 to provide a source of power for increasing the volume of the second chamber A22. As shown in fig. 12 and 14, the water source may be tap water, the second chamber a22 may be in communication with the tap water, and a first control switch a33 is disposed between the second chamber a22 and the tap water. Of course, the air source may be a cylinder with a higher pressure, the second chamber a22 can be connected with tap water, and the first control switch a33 is arranged between the cylinders of the second chamber a 22. The second chamber a22 may also be not in communication with a water or air source. For example, when the spacer a23 is a piston, an elastic member a24, such as a spring, may be disposed in the second chamber a 22. The partition a23 may also be an air bag with a second chamber a22 inside, which is inflated with gas. The partition a23 may also be in sealed contact with the side wall of the water storage device a2 so that the second chamber a22 forms a sealed space in which air is stored in the second chamber a 22. The second chamber a22 is formed by the partition a23 and the side wall of the water storage device a2, and the partition a23 may be a flexible diaphragm or a rubber-like substance with certain elasticity, depending on whether the air stored in the second chamber a22 can provide enough pressure after being compressed to make the pure water stored in the first chamber a21 press out of the cleaning reverse osmosis membrane device a 1. Fig. 15 is a schematic structural view of a water purifier in an embodiment of the present invention, in a seventh embodiment, as shown in fig. 12 and 15, a second chamber a22 of a water storage device a2 may be communicated with the outside to ensure the air pressure inside the water storage device a 2. The partition A23 is provided with a first electromagnet A36, and a second electromagnet A37 opposite to the first electromagnet A36 is arranged in the second chamber A22, so that the volume of the first chamber A21 is increased or reduced under the action of the first electromagnet A36 and the second electromagnet A37.

In the present application, the applicant also proposes a water purification machine comprising: a reverse osmosis membrane device a1 having a raw water port a13, a pure water port a11, and a concentrate water port a 12; raw water flowing into the reverse osmosis membrane device a1 from the raw water port a13 is filtered by the reverse osmosis membrane device a1 to flow out pure water from the pure water port a11 and concentrated water from the concentrated water port a 12; a water storage device A2 capable of communicating with the pure water port A11 and storing pure water; the water purifier has a cleaning state that pure water in the water storage device A2 flows into the reverse osmosis membrane device A1; in the cleaning state, pure water in the water storage device a2 can flow to the reverse osmosis membrane device a1 by the action of gravitational potential energy or an external water pump.

In the embodiment in which the pure water in the water storage device a2 can flow to the reverse osmosis membrane device a1 by gravitational potential energy, the reverse osmosis membrane device a1 has a raw water port a13, a pure water port a11, and a concentrated water port a12, and filters the fluid flowing in from the raw water port a13, the filtered fluid flows out from the pure water port a11, and the concentrated water is discharged from the concentrated water port of the reverse osmosis membrane device a 1. The raw water port A13 of the reverse osmosis membrane device A1 is communicated with a water pump A5. The water storage device A2 is internally provided with a first chamber A21 communicated with the outside, the first chamber A21 of the water storage device A2 is provided with a first opening and a second opening, the first opening is connected with a raw water port A13 of a reverse osmosis membrane device A1, and the second opening is connected with a pure water port A11 and a user water end A10. A first switch device a31 is provided between the first chamber a21 and the raw water port a13, and a second switch device a32 is provided between the first chamber a21 and the pure water port a 11. The first switch device a31 and the second switch device a32 are used for controlling the on-off between the first chamber a21 of the water storage device a2 and the raw water port a13 of the reverse osmosis membrane device a1 and between the first chamber a21 of the water storage device a2 and the pure water port a11 of the reverse osmosis membrane device a 1. The height of the water storage device A2 is far greater than that of the reverse osmosis membrane device A1. When the user of the water purifier stops using the water end A10, the water pump A5 continues to operate, and the pure water flowing out of the pure water port A11 flows into the first chamber A21 under the pressure of the water pump A5, and at this time, the pure water flowing into the first chamber A21 has a large gravitational potential energy. When a certain level is reached, the water pump a5 is turned off, and at the same time the first chamber a21 may be disconnected from the pure water port a11 by the second switch means a 32. The water purifier may then enter a cleaning state, in which the first chamber a21 is in a disconnected state from the pure water port a11 and the first chamber a21 is in a connected state with the raw water port a13 by the first switching device a31 and the second switching device. Since the height of the pure water in the first chamber a21 is much higher than that of the reverse osmosis membrane device a1, the pure water in the first chamber a21 flows into the raw water port a13 of the reverse osmosis membrane device a1 under the action of gravitational potential energy, so that the reverse osmosis membrane device a1 is washed by the pure water, and the washed water is discharged from the concentrated water port a12 of the reverse osmosis membrane device a 1. In this embodiment, the arrangement of the third switching device a34, the carbon rod cartridge a6, the PP cotton cartridge a7, the pre-cartridge A8, the waste water ratio device a4 and the quick drain line may be the same as those in the other embodiments, and will not be described here. In this embodiment, a filter material may be disposed in the first chamber a 21. The first chamber a21 is divided into a third chamber a211 and a fourth chamber a212 by the filter material, the third chamber a211 is communicated with the pure water port a11 of the reverse osmosis membrane device a1, and the fourth chamber a212 is communicated with the raw water port a13 of the reverse osmosis membrane device a 1. Meanwhile, the fourth chamber a212 communicates with the user water end a 10. In this way, the pure water flowing out of the pure water port a11 of the reverse osmosis membrane apparatus a1 must be filtered by the filter material, and then flows into the fourth chamber a212, and finally flows from the fourth chamber a212 to the user water port a 10.

In another embodiment in which pure water in the water storage device a2 can flow to the reverse osmosis membrane device a1 by gravitational potential energy, the reverse osmosis membrane device a1 has a raw water port a13, a pure water port a11, and a concentrated water port a12 for filtering fluid flowing in from the raw water port a13, the filtered fluid flows out from the pure water port a11, and concentrated water is discharged from the concentrated water port of the reverse osmosis membrane device a 1. The raw water port A13 of the reverse osmosis membrane device A1 is communicated with a water pump A5. The water storage device A2 is internally provided with a first chamber A21 communicated with the outside, the first chamber A21 of the water storage device A2 is provided with a first opening, the first opening is connected with a raw water port A13 of a reverse osmosis membrane device A1, and the first opening is connected with a pure water port A11 and a user water end A10. A first switch device a31 is provided between the first chamber a21 and the raw water port a13, and a second switch device a32 is provided between the first chamber a21 and the pure water port a 11. The height of the water storage device A2 is far greater than that of the reverse osmosis membrane device A1. In this embodiment, the arrangement of the third switching device a34, the carbon rod cartridge a6, the PP cotton cartridge a7, the pre-cartridge A8, the waste water ratio device a4 and the quick drain line may be the same as those in the other embodiments, and will not be described here.

In the embodiment in which pure water in the water storage device a2 can flow to the reverse osmosis membrane device a1 by the external water pump, the reverse osmosis membrane device a1 has a raw water port a13, a pure water port a11, and a concentrated water port a12, and filters fluid flowing in from the raw water port a13, filtered fluid flows out from the pure water port a11, and concentrated water is discharged from the concentrated water port of the reverse osmosis membrane device a 1. The raw water port A13 of the reverse osmosis membrane device A1 is communicated with a water pump A5. The water storage device A2 is internally provided with a first chamber A21 communicated with the outside, the first chamber A21 of the water storage device A2 is provided with a first opening and a second opening, the first opening is connected with a raw water port A13 of a reverse osmosis membrane device A1, and the second opening is connected with a pure water port A11 and a user water end A10. A first switching device a31 and an external water pump are provided between the first chamber a21 and the raw water port a13, and a second switching device a32 is provided between the first chamber a21 and the pure water port a 11. When the user of the water purifier stops using the water end A10, the water pump A5 continues to operate, and pure water flowing out of the pure water port A11 flows into the first chamber A21 under the pressure of the water pump A5. When a certain level is reached, the water pump a5 is turned off, and at the same time the first chamber a21 may be disconnected from the pure water port a11 by the second switch means a 32. The water purifier may then enter a cleaning state, in which the first chamber a21 is in a disconnected state from the pure water port a11 and the first chamber a21 is in a communication state with the raw water port a13 by the first switch device a31 and the second switch device, and the external water pump is turned on to deliver the pure water in the first chamber a21 to the raw water port a13 of the reverse osmosis membrane device a 1. The reverse osmosis membrane device a1 is washed with pure water, and the washed water is discharged from the concentrate port a12 of the reverse osmosis membrane device a 1. In this embodiment, the arrangement of the third switching device a34, the carbon rod cartridge a6, the PP cotton cartridge a7, the pre-cartridge A8, the waste water ratio device a4 and the quick drain line may be the same as those in the other embodiments, and will not be described here. In this embodiment, a filter material may be disposed in the first chamber a 21. The first chamber a21 is divided into a third chamber a211 and a fourth chamber a212 by the filter material, the third chamber a211 is communicated with the pure water port a11 of the reverse osmosis membrane device a1, and the fourth chamber a212 is communicated with the raw water port a13 of the reverse osmosis membrane device a 1. Meanwhile, the fourth chamber a212 communicates with the user water end a 10.

In another embodiment in which pure water in the water storage device a2 can flow to the reverse osmosis membrane device a1 by an external water pump, the reverse osmosis membrane device a1 has a raw water port a13, a pure water port a11, and a concentrated water port a12 for filtering fluid flowing in from the raw water port a13, the filtered fluid flows out from the pure water port a11, and concentrated water is discharged from the concentrated water port of the reverse osmosis membrane device a 1. The raw water port A13 of the reverse osmosis membrane device A1 is communicated with a water pump A5. The water storage device A2 is internally provided with a first chamber A21 communicated with the outside, the first chamber A21 of the water storage device A2 is provided with a first opening, the first opening is connected with a raw water port A13 of a reverse osmosis membrane device A1, and the first opening is connected with a pure water port A11 and a user water end A10. A first switching device a31 and an external water pump are provided between the first chamber a21 and the raw water port a13, and a second switching device a32 is provided between the first chamber a21 and the pure water port a 11. In this embodiment, the arrangement of the third switching device a34, the carbon rod cartridge a6, the PP cotton cartridge a7, the pre-cartridge A8, the waste water ratio device a4 and the quick drain line may be the same as those in the other embodiments, and will not be described here.

In the present application, the applicant also proposes a water purification machine comprising: a reverse osmosis membrane device a1 having a raw water port a13, a pure water port a11, and a concentrate water port a 12; raw water flowing into the reverse osmosis membrane device a1 from the raw water port a13 is filtered by the reverse osmosis membrane device a1 to flow out pure water from the pure water port a11 and concentrated water from the concentrated water port a 12; a water storage device a2, wherein the water purifier has a cleaning state in which pure water in the water storage device a2 flows into the reverse osmosis membrane device a 1; the water storage device A2 is connected between the pure water port A11 and the water end A10 for users; pure water flowing out of the reverse osmosis membrane device A1 flows through the water storage device A2; the water purifier stores water in the water storage device a2 after the user water end a10 is closed, so that the water purifier uses pure water in a cleaning state.

Specifically, fig. 16 is a schematic structural diagram of a water purifier in an eighth embodiment of the present invention, and as shown in fig. 16, a reverse osmosis membrane device a1 has a raw water port a13, a pure water port a11, and a concentrated water port a12, a water storage device a2 has a first opening and a second opening, the first opening is connected to the raw water port a13 of the reverse osmosis membrane device a1, and the second opening is connected to the pure water port a11 and a user water port a 10. Thus, the water storage device a2 is connected between the pure water port a11 and the user water end a10, and the pure water flowing out of the reverse osmosis membrane device a1 flows through the water storage device a 2. The water purifier has a cleaning water path for communicating a water storage device A2 and a raw water port A13, a first switch device A31 is arranged on the cleaning water path between a first chamber A21 and the raw water port A13, and a second switch device A32 is arranged between the first chamber A21 and a pure water port A11. The first switch device a31 and the second switch device a32 are used for controlling the on-off between the water storage device a2 and the raw water port a13 of the reverse osmosis membrane device a1 and the on-off between the water storage device a2 and the pure water port a11 of the reverse osmosis membrane device a 1. When the water purifier is in a daily starting state, when a water end A10 for a user is opened, the water purifier is in a water production state, a water storage device A2 is communicated with a pure water port A11, a water pump A5 is opened, water of a water source (tap water) is pressurized and then conveyed to a reverse osmosis membrane device A1 in the water purifier under the driving of the water pump A5, the reverse osmosis membrane device A1 in the water purifier can filter water flowing from a raw water port A13 into pure water, the pure water flows out from the pure water port A11, and concentrated water is discharged from a concentrated water port A12. When the user stops using the water end A10 (is closed), the water pump A5 continues to work for a period of time, so that the reverse osmosis membrane device A1 can continue to produce pure water; pure water flowing out of the pure water port a11 of the reverse osmosis membrane apparatus a1 flows into the water storage apparatus a2 to be stored for washing of the reverse osmosis membrane apparatus a1 under the pressure supplied from the water pump a5 while the user is in a closed state at the water end a 10. After the water storage device a2 stores pure water, the water purifier can enter a cleaning state at any time, in the cleaning state, the water storage device a2 is disconnected from the pure water port a11, the water storage device a2 is communicated with the raw water port a13, so that the pure water stored in the water storage device a2 is discharged to the raw water port a13 of the reverse osmosis membrane device a1, part of the pure water flows into the reverse osmosis membrane device a1 from the raw water port a13 of the reverse osmosis membrane device a1, and then the reverse osmosis membrane in the reverse osmosis membrane device a1 is cleaned, so that the concentrated water on the raw water side of the reverse osmosis membrane is cleaned and replaced by the pure water, and the cleaned pure water flows out from the concentrated water port a12 of the reverse osmosis membrane device a 1. In the process, when pure water flowing out of the pure water port A11 of the reverse osmosis membrane device A1 reaches the water end A10 of a user, the pure water must flow through the water storage device A2, so that the water which can be stored in the water storage device A2 is running water, and in the process of long-term use, impurities generated by accumulation or bacteria breeding are difficult to accumulate in the water storage device A2, so that the quality of the pure water when the reverse osmosis membrane device A1 is washed by the water storage device A2 is ensured, and the quality of water used by the water end A10 of the user is finally ensured. In the above embodiment, the first switch device a31 and the second switch device a32 may be solenoid valves, and when the first switch device a31 and the second switch device a32 are solenoid valves, a check valve a39 for allowing water in the water storage device a2 to flow to the raw water port a13 needs to be provided in a cleaning water path between the water storage device a2 and the raw water port a 13. A check valve a39 for allowing water in the reverse osmosis membrane apparatus a1 to flow to the water storage apparatus a2 may be provided between the water storage apparatus a2 and the pure water port a 11. In this way, in the water-making state and under water storage in the water storage apparatus a2, water flowing into the raw water port a13 of the reverse osmosis membrane apparatus a1 can be prevented from flowing into the water storage apparatus a 2. In the cleaning state, the pure water in the water storage apparatus a2 can be prevented from flowing into the pure water port a11 of the reverse osmosis membrane apparatus a 1. In the above embodiment, the concentrate port a12 of the reverse osmosis membrane apparatus a1 in the water purifier is provided with the wastewater ratio apparatus a4, the rapid drain path is connected in parallel to the wastewater ratio apparatus a4 of the water purifier, and the fourth switching apparatus a35 is provided on the rapid drain path. When the water purifier is in a cleaning state, pure water discharged from the first chamber a21 flows in from the raw water port a13 of the reverse osmosis membrane device a1, and the pure water first flushes the reverse osmosis membrane device a1, is discharged from the concentrate water port a12 of the reverse osmosis membrane device a1, and further flows through the wastewater ratio device a 4. While flowing through the waste water ratio device a4, pure water also flushes the waste water ratio device a4, so that the original concentrated water in the waste water ratio device a4 is flushed away by the pure water. Through the mode, the pure water flowing out of the concentrate port A12 of the reverse osmosis membrane device A1 can flush the wastewater ratio device A4 in the water purifier, and the service life of the wastewater ratio device A4 is prolonged. When the wastewater ratio device A4 is not required to be flushed, the fourth switching device A35 can be opened, the water purifier is flushed quickly, and water discharged from the concentrated water port A12 is directly discharged from the quick water discharge channel. In this embodiment, the arrangement of the third switching device a34, the carbon rod cartridge a6, the PP cotton cartridge a7, the pre-cartridge A8, and the like may be the same as those in the other embodiments, and will not be described here.

Fig. 17 is a schematic structural diagram of a water purifier in a ninth embodiment according to an embodiment of the present invention, and as shown in fig. 16 and 17, the applicant further proposed a water purifier in the present application, including: a reverse osmosis membrane device a1 having a raw water port a13, a pure water port a11, and a concentrate water port a 12; raw water flowing into the reverse osmosis membrane device a1 from the raw water port a13 is filtered by the reverse osmosis membrane device a1 to flow out pure water from the pure water port a11 and concentrated water from the concentrated water port a 12; a water pump a5 in communication with the raw water port a13 of the reverse osmosis membrane unit a1 to drive water through the reverse osmosis membrane unit a 1; a water storage device A2 capable of communicating with the pure water port A11 and storing pure water; after the water purifier is opened at the water end A10 of the user, the water pump A5 drives raw water to flow through the reverse osmosis membrane device A1 to supply pure water to the water end A10 of the user; after the user water end a10 is closed, the water pump a5 drives water to flow through the reverse osmosis membrane device a1 to provide pure water for the water storage device a2, and the water pump a5 is closed until a preset stop condition is reached.

The preset stop condition at least comprises one of the following conditions: the pressure in the pipeline of the water purifier meets a preset value, the liquid level in the first chamber A21 meets a preset value, the first preset time and the current of the booster water pump A5 meet preset values. In one embodiment, after the water storage device a2 is full of water, the pressure in the water line may further increase due to the continuous operation of the water pump a5, so that the water pump a5 may be stopped when the pressure in the water purifier line meets a predetermined value. In one embodiment, when the water storage apparatus a2 is full of water, that is, the liquid level in the first chamber a21 of the water storage apparatus a2 will satisfy the preset value, a liquid level detection device may be disposed in the first chamber a21 to detect whether the liquid level in the first chamber a21 satisfies the preset value, and if so, the water pump a5 is stopped. In one embodiment, when the water storage device a2 is full of water, the water pump a5 is stopped when the current of the water pump a5 is detected to meet a predetermined value after the current of the water pump a5 changes (indicating that the water storage device a2 is full of water) because the water pump a5 continues to operate but the water pump a5 cannot supply water to the water storage device a 2. In one embodiment, the water storage device a2 has a partition a23, the partition a23 separates the interior of the water storage device a2 into a first chamber a21 and a second chamber a22 which are isolated from each other, the partition a23 can adjust the sizes of the first chamber a21 and the second chamber a22, the partition a23 is a diaphragm, in the above structure, the diaphragm may be provided with a trigger switch which can detect that the phase change of the diaphragm reaches a preset requirement and send a signal, and the preset stop condition includes the signal of the trigger switch.

When the user stops using the water end A10 and the water storage device A2 is full of water, the water purifier can judge when to enter the cleaning state. In an alternative embodiment, after the water storage device a2 is full of water, the water purifier enters a cleaning state immediately, and the reverse osmosis membrane device a1 is cleaned to the maximum extent. In order to avoid the excessive cleaning times of the reverse osmosis membrane device A1 and waste of water, the water purifier can be in a cleaning state when the duration of the water end A10 for the user is closed exceeds a first preset cleaning duration. For example, the first preset cleaning time can be set to a12 hours, generally speaking, after the reverse osmosis membrane device a1 is cleaned by pure water in the water storage device a2, the total dissolved solids of water in the reverse osmosis membrane device a1 in a certain time can not rise obviously, so that the total dissolved solids of the water just discharged from the water purifier can be effectively reduced by setting the reasonable first preset cleaning time, and the waste of water resources caused by too many times of cleaning can be avoided.

The water purifier can detect whether the water storage device A2 finishes storing water or not after the water pump A5 continues to work for a period of time after the water end A10 of a user stops using the water purifier, and the water pump A5 is turned off if the water storage is finished. Simultaneously, the purifier washs reverse osmosis membrane device A1 according to the in service behavior of user's reality to the purifier, so, the Total Dissolved Solids (TDS) of first cup of pure water when effectively reducing the purifier under the washing number of times as far as possible goes out water, under the prerequisite of using water wisely, reduces to wash repeatedly for a long time and causes the harm to reverse osmosis membrane device A1, and then increases the life of purifier.

In the present specification, a plurality of embodiments of the water purifier are described, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. Although a number of embodiments of the present water purifier have been shown and described above, it will be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims. For example, a water purifier as suggested in fig. 16 and 17 comprises: a reverse osmosis membrane device a1 having a raw water port a13, a pure water port a11, and a concentrate water port a 12; raw water flowing into the reverse osmosis membrane device a1 from the raw water port a13 is filtered by the reverse osmosis membrane device a1 to flow out pure water from the pure water port a11 and concentrated water from the concentrated water port a 12; a water pump a5 in communication with the raw water port a13 of the reverse osmosis membrane unit a1 to drive water through the reverse osmosis membrane unit a 1; a water storage device A2 capable of communicating with the pure water port A11 and storing pure water; after the water purifier is opened at the water end A10 of the user, the water pump A5 drives raw water to flow through the reverse osmosis membrane device A1 to supply pure water to the water end A10 of the user; after the user water end a10 is closed, the water pump a5 drives water to flow through the reverse osmosis membrane device a1 to provide pure water for the water storage device a2, and the water pump a5 is closed until a preset stop condition is reached. Another water purification machine proposed by the applicant comprises: a reverse osmosis membrane device a1 having a raw water port a13, a pure water port a11, and a concentrate water port a 12; raw water flowing into the reverse osmosis membrane device a1 from the raw water port a13 is filtered by the reverse osmosis membrane device a1 to flow out pure water from the pure water port a11 and concentrated water from the concentrated water port a 12; a water storage device A2, a first chamber A21 with adjustable volume is arranged inside, and the first chamber A21 can be communicated with a pure water port A11; the water purifier has a water storage process that the volume of a first chamber A21 is increased; wherein, the water stored in the first chamber A21 is pure water; when the volume of the first chamber a21 is reduced, pure water flowing out of the first chamber a21 is used to clean the reverse osmosis membrane apparatus a 1. A plurality of modes under the above-mentioned two kinds of purifier can carry out reasonable combination change, for example, form a purifier, this purifier includes: a reverse osmosis membrane device a1 having a raw water port a13, a pure water port a11, and a concentrate water port a 12; raw water flowing into the reverse osmosis membrane device a1 from the raw water port a13 is filtered by the reverse osmosis membrane device a1 to flow out pure water from the pure water port a11 and concentrated water from the concentrated water port a 12; a water pump a5 in communication with the raw water port a13 of the reverse osmosis membrane unit a1 to drive water through the reverse osmosis membrane unit a 1; a water storage device A2, a first chamber A21 with adjustable volume is arranged inside, and the first chamber A21 can be communicated with a pure water port A11; the water purifier has a water storage process that the volume of a first chamber A21 is increased; wherein, the water stored in the first chamber A21 is pure water; when the volume of the first chamber a21 is reduced, pure water flowing out of the first chamber a21 is used for cleaning the reverse osmosis membrane device a 1; after the water purifier is opened at the water end A10 of the user, the water pump A5 drives raw water to flow through the reverse osmosis membrane device A1 to supply pure water to the water end A10 of the user; after the user water end a10 is closed, the water pump a5 drives water to flow through the reverse osmosis membrane device a1 to provide pure water for the water storage device a2, and the water pump a5 is closed until a preset stop condition is reached. In the same way, other embodiments based on the two water purifiers can be reasonably combined to form other water purifiers.

In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate medium, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The control method of the water purifier is characterized in that the water purifier comprises a filtering device, a water inlet, a pure water inlet and a concentrated water inlet, wherein the water inlet and the concentrated water inlet are positioned on the raw water side of the filtering device; the pure water supply device can be communicated with the raw water side, the pure water supply device comprises a water storage device, the water storage device can be communicated with the pure water port so that pure water flowing out of the filtering device flows into the water storage device to be stored, an elastic isolating piece is arranged in the water storage device, the isolating piece separates the interior of the water storage device into a first chamber and a second chamber which are isolated from each other, the size of the first chamber and the size of the second chamber can be adjusted through the isolating piece, the first chamber can be respectively communicated with the raw water side, the pure water port and a user water end, the second chamber can be communicated with a water source, and the water source is tap water; an opening/closing valve communicating with the raw water side;

the control method comprises the following steps:

after raw water passes through the filtering device, when a preset condition one is satisfied, the pure water supply device is communicated with the raw water side so that pure water flows into the raw water side.

2. The control method according to claim 1, wherein in the step of communicating the pure water supply device with the raw water side to cause pure water to flow into the raw water side, the pure water supply device is communicated with the raw water port to cause pure water to flow into the raw water port and flow out of the concentrate port.

3. The control method according to claim 2, wherein the open-close valve communicates with the concentrate port.

4. The control method according to claim 1, wherein in the step of communicating the pure water supply device with the raw water side to cause pure water to flow into the raw water side, the pure water supply device is communicated with the concentrate port to cause pure water to flow into the concentrate port and flow out of the raw water port.

5. The control method according to claim 4, wherein the open-close valve communicates with the raw water port.

6. The control method according to claim 5, wherein the opening and closing valve is in an open state to allow raw water to pass through the filter device from a raw water port of the filter device and flow out from the concentrate port or to allow raw water to pass through the filter device from a concentrate port of the filter device and flow out from the raw water port when a second preset condition is satisfied, the second preset condition including at least one of: the pressure in the pipeline of the water purifier meets a preset value, the liquid level in the first chamber meets a preset value, the second preset time and the current of the water pump meet preset values.

7. The control method according to claim 1, wherein the preset condition one comprises at least one of: a first preset time, a preset flow rate and a TDS value of the water flowing out of the raw water side.

8. The control method according to claim 5, wherein the water purifier further includes a water pump communicating with the raw water port of the filter device, the control method further comprising:

9. The control method according to claim 5, characterized in that the pure water supply means and the raw water side are disconnected when a preset condition three is satisfied.

10. The control method according to claim 9, wherein the preset condition three includes at least one of: a third preset time, the liquid level in the first chamber not meeting a preset value, and the pressure in the first chamber not meeting a preset value.

11. The control method according to claim 5, characterized in that said first chamber is connected in series between said pure water port and a user water end of said filtering device.

12. The control method of claim 1, wherein the filtering device comprises one of a reverse osmosis membrane filtering device and a nanofiltration membrane filtering device.

13. The control method according to claim 5, wherein the water purifier further comprises a water pump communicated with the raw water port of the filtering device, a second switching device is arranged between the pure water port and the first chamber, a first switching device is arranged between the first chamber and the raw water port, a waste water ratio device connected to the concentrated water port is connected in parallel with a quick drain path, the on-off valve is arranged on the quick drain path, and a third switching device is arranged in front of a water inlet of the water pump,

14. The control method according to claim 13, wherein the open-close valve is opened when a preset condition two is satisfied and a duration that the user water end is closed exceeds a first preset purge duration.

15. The control method according to claim 14, characterized by further comprising: when the closing duration of the water using end of the user exceeds a second preset cleaning duration, the water pump and the third switching device are started to enable the first chamber to enter a water storage state; and the second preset cleaning time length is longer than the first preset cleaning time length.

16. The control method according to claim 15, wherein the water purifier further comprises a fourth switching device disposed between the user water end and the water storage device, the control method further comprising: