Waterway system and water purifier

Abstract

The utility model relates to a waterway system and a water purifier, the waterway system comprises a raw water port, an ultrafiltration membrane filter element, a booster pump, a reverse osmosis membrane filter element and a water purification port which are sequentially communicated through a pipeline, and the waterway system further comprises a first electric valve, a first electromagnetic valve and a second electromagnetic valve, the waterway system further comprises a first sewage port, a second electric valve and a gas-liquid mixing pump; the first sewage port is communicated with the ultrafiltration membrane filter element through a pipeline; the second electric valve is arranged on a pipeline between the ultrafiltration membrane filter element and the first sewage port; the gas-liquid mixing pump is provided with a gas inlet, a liquid inlet and a gas-liquid outlet, and the gas-liquid outlet is communicated with a pipeline between the ultrafiltration membrane filter element and the booster pump. The water path system can realize positive flushing and back flushing on the ultrafiltration membrane filter element, and bubble water is adopted during back flushing, so that the cleaning effect on the ultrafiltration membrane filter element is improved, the cleaning is thorough, the filtering effect of the ultrafiltration membrane filter element is ensured, and the service life of the ultrafiltration membrane filter element and the whole water path system is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of water purification equipment, in particular to a water channel system and a water purifier. Background Art

[0002] The water system of a water purifier usually uses a filter element to filter water to effectively remove impurities and harmful substances in the water. The filter element will become dirty after being used for a period of time, affecting the filtering effect, so it needs to be replaced or cleaned frequently.

[0003] However, frequent replacement of filter elements will cause certain waste and high costs; and the existing filter element cleaning methods have poor cleaning effects and usually cannot completely clean the filter element. Utility Model Content

[0004] Based on this, it is necessary to provide a water system and a water purifier to address the above problems, wherein the water system can improve the cleaning effect of the membrane filter element and extend its service life.

[0005] The utility model first provides a water system, comprising a raw water port, an ultrafiltration membrane filter element, a booster pump, a reverse osmosis membrane filter element and a clean water port which are connected in sequence through a pipeline, the water system also comprises a first electric valve arranged on the pipeline between the raw water port and the ultrafiltration membrane filter element, a first solenoid valve arranged on the pipeline between the booster pump and the reverse osmosis membrane filter element and a second solenoid valve arranged on the pipeline between the reverse osmosis membrane filter element and the clean water port, the water system also comprises: a first sewage port, which is connected to the ultrafiltration membrane filter element through a pipeline; a second electric valve, which is arranged on the pipeline between the ultrafiltration membrane filter element and the first sewage port; and a gas-liquid mixing pump, which is provided with a gas inlet, a liquid inlet and a gas-liquid outlet, the gas-liquid outlet being connected to the pipeline between the ultrafiltration membrane filter element and the booster pump.

[0006] In the above-mentioned water circuit system, when flushing the ultrafiltration membrane filter element, firstly, the gas-liquid mixing pump and the second electric valve are controlled to be opened, gas enters the gas-liquid mixing pump through the gas inlet, water enters the gas-liquid mixing pump through the liquid inlet, and forms bubble water after being mixed by the gas-liquid mixing pump, and the bubble water flows to the ultrafiltration membrane filter element through the gas-liquid outlet, so that the ultrafiltration membrane filter element is backwashed with bubble water, and the wastewater formed after flushing the ultrafiltration membrane filter element is discharged through the first sewage port; then the first electric valve and the second electric valve are controlled to be opened, water enters the water circuit system through the raw water port and flows to the ultrafiltration membrane filter element, so that the ultrafiltration membrane filter element is positively flushed, and the wastewater formed after flushing the ultrafiltration membrane filter element is discharged through the first sewage port; thereby, the ultrafiltration membrane filter element can be positively flushed and backwashed, and bubble water is used during backwashing to improve the cleaning effect of the ultrafiltration membrane filter element, so that the cleaning is thorough, the filtering effect of the ultrafiltration membrane filter element is guaranteed, and the service life of the ultrafiltration membrane filter element and the water circuit system as a whole is extended.

[0007] In one of the embodiments, the water system further includes a water tank connected to the liquid inlet through a pipeline and a third solenoid valve arranged on the pipeline between the water tank and the gas-liquid mixing pump.

[0008] In this arrangement, the water tank is used to store water and to supply water for flushing the ultrafiltration membrane element.

[0009] In one of the embodiments, a solid cleaning agent soluble in water is provided in the water tank.

[0010] With such arrangement, the ultrafiltration membrane filter element is backwashed with a cleaning liquid, which can improve the backwashing effect of the ultrafiltration membrane filter element and make the cleaning more thorough.

[0011] In one of the embodiments, a liquid level valve is provided in the water tank, and the third solenoid valve is configured to be opened or closed in response to the water level in the water tank detected by the liquid level valve.

[0012] With this arrangement, the liquid level valve detects the water level in the water tank in real time to ensure that there is enough water to flush the ultrafiltration membrane element and to prevent water from overflowing from the water tank.

[0013] In one embodiment, the water tank is connected to the pipeline between the reverse osmosis membrane filter element and the second solenoid valve, and the water system further includes a fourth solenoid valve disposed on the pipeline between the reverse osmosis membrane filter element and the water tank.

[0014] With such an arrangement, the water used for backwashing the ultrafiltration membrane filter element is purified water after filtration, thereby preventing impurities in the water from remaining on the ultrafiltration membrane filter element and improving the cleaning effect of the ultrafiltration membrane filter element.

[0015] In one embodiment, the water system further includes a second sewage port connected to the reverse osmosis membrane filter element through a pipeline and a fifth solenoid valve disposed on the pipeline between the reverse osmosis membrane filter element and the second sewage port.

[0016] In this way, the reverse osmosis membrane filter element is flushed with bubble water to improve the cleaning effect of the reverse osmosis membrane filter element, so that the cleaning is thorough, thereby ensuring the filtering effect of the reverse osmosis membrane filter element and extending the service life of the reverse osmosis membrane filter element and the water system as a whole.

[0017] In one embodiment, the water system further includes a pressure switch disposed on the pipeline between the reverse osmosis membrane filter element and the second solenoid valve, and the first electric valve, the booster pump and the first solenoid valve are configured to be opened or closed in response to the water pressure detected by the pressure switch.

[0018] With this arrangement, the pressure switch can prevent danger caused by excessive water pressure inside the pipeline and ensure the safety of the water system.

[0019] In one embodiment, the water system further includes a post-carbon filter element disposed between the reverse osmosis membrane filter element and the water purification port.

[0020] With this arrangement, the post-carbon filter element can further filter the water after it has been filtered by the ultrafiltration membrane filter element and the reverse osmosis membrane filter element, thereby improving the overall filtering effect of the water system and ensuring the safety of the purified water quality.

[0021] In one embodiment, the ultrafiltration membrane filter element is configured as a hollow fiber membrane filter element.

[0022] With such arrangement, the hollow fiber membrane filter element has a strong filtering capacity, and both forward flushing and back flushing of the hollow fiber membrane filter element will not damage its structure, thereby being able to extend the service life of the ultrafiltration membrane filter element.

[0023] The utility model also provides a water purifier, comprising the water channel system as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A schematic diagram of a waterway system in one embodiment of the utility model;

[0026] Figure 2 for Figure 1 Schematic diagram of the flow direction of the water system during water production;

[0027] Figure 3 for Figure 1 Schematic diagram of the flow direction of the water system when adding water to the water tank;

[0028] Figure 4 for Figure 1 Schematic diagram of the flow direction of the water system when backwashing the ultrafiltration membrane filter element;

[0029] Figure 5 for Figure 1 Schematic diagram of the flow direction of the water system when flushing the ultrafiltration membrane filter element;

[0030] Figure 6 for Figure 1 Schematic diagram of the flow direction of the water system when flushing the reverse osmosis membrane filter element.

[0031] Figure markings: 11, raw water port; 12, clean water port; 13, first sewage port; 14, second sewage port; 15, air inlet port; 2, ultrafiltration membrane filter element; 3, booster pump; 4, reverse osmosis membrane filter element; 5, gas-liquid mixing pump; 6, water tank; 61, solid cleaning agent; 62, liquid level valve; 7, pressure switch; 8, post-carbon filter element; 91, first one-way valve; 92, second one-way valve; 93, third one-way valve; Q1, first electric valve; Q2, second electric valve; M1, first solenoid valve; M2, second solenoid valve; M3, third solenoid valve; M4, fourth solenoid valve; M5, fifth solenoid valve. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0033] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0037] In the water system of water purifiers, polypropylene melt-blown filter elements, activated carbon, etc. are usually used as filter elements to filter water to effectively remove impurities and harmful substances in the water. The filter element will become dirty after a period of use, affecting the filtering effect, so it needs to be replaced or cleaned frequently. However, frequent replacement of filter elements will cause certain waste and high costs; and the existing filter element cleaning method has poor cleaning effect and usually cannot completely clean the filter element.

[0038] In order to solve the above problems, Figures 1 to 6 As shown, the utility model first provides a water system to improve the cleaning effect of the filter element and extend the service life.

[0039] like Figure 1 As shown, specifically, the water system includes a raw water port 11, an ultrafiltration membrane filter element 2, a booster pump 3, a reverse osmosis membrane filter element 4 and a clean water port 12 which are connected in sequence through pipelines. The water system also includes a first electric valve Q1 arranged on the pipeline between the raw water port 11 and the ultrafiltration membrane filter element 2, a first solenoid valve M1 arranged on the pipeline between the booster pump 3 and the reverse osmosis membrane filter element 4, and a second solenoid valve M2 arranged on the pipeline between the reverse osmosis membrane filter element 4 and the clean water port 12. The water system also includes a first sewage port 13, a second electric valve Q2 and a gas-liquid mixing pump 5, wherein: the first sewage port 13 is connected to the ultrafiltration membrane filter element 2 through a pipeline; the second electric valve Q2 is arranged on the pipeline between the ultrafiltration membrane filter element 2 and the first sewage port 13; the gas-liquid mixing pump 5 is provided with a gas inlet, a liquid inlet and a gas-liquid outlet, and the gas-liquid outlet is connected to the pipeline between the ultrafiltration membrane filter element 2 and the booster pump 3.

[0040] In the waterway system provided by the embodiment of the utility model, Figure 2 As shown, when the water system produces water, the first electric valve Q1, the booster pump 3, the first solenoid valve M1 and the second solenoid valve M2 are all controlled to be opened, and the raw water enters the water system through the raw water port 11, and passes through the ultrafiltration membrane filter element 2, the booster pump 3 and the reverse osmosis membrane filter element 4 in turn. The raw water is filtered through the ultrafiltration membrane filter element 2 and the reverse osmosis membrane filter element 4 to form clean water, and the clean water flows out through the clean water port 12.

[0041] When flushing the ultrafiltration membrane element 2, if Figure 4 As shown, the gas-liquid mixing pump 5 and the second electric valve Q2 are controlled to be open, gas can enter the gas-liquid mixing pump 5 through the gas inlet, water can enter the gas-liquid mixing pump 5 through the liquid inlet, and form bubble water after being mixed by the gas-liquid mixing pump 5. The bubble water flows to the ultrafiltration membrane filter element 2 through the gas-liquid outlet, so that the ultrafiltration membrane filter element 2 is backwashed with bubble water, and the wastewater formed after flushing the ultrafiltration membrane filter element 2 is discharged through the first sewage port 13; after reaching the preset flushing time, the gas-liquid mixing pump 5 and the second electric valve Q2 are controlled to be closed, and the backwashing is completed. Figure 5 As shown, the first electric valve Q1 and the second electric valve Q2 are controlled to open, and water enters the water system through the raw water port 11 and flows to the ultrafiltration membrane filter element 2 to perform positive flushing on the ultrafiltration membrane filter element 2. The wastewater formed after flushing the ultrafiltration membrane filter element 2 is discharged through the first sewage port 13; after reaching the preset flushing time, the first electric valve Q1 and the second electric valve Q2 are controlled to close, and the positive flushing is completed. In this way, the ultrafiltration membrane filter element 2 can be positively flushed and backwashed, and bubble water is used during backwashing to improve the cleaning effect of the ultrafiltration membrane filter element 2, so that the cleaning is thorough, the filtering effect of the ultrafiltration membrane filter element 2 is guaranteed, and the service life of the ultrafiltration membrane filter element 2 and the water system as a whole is extended.

[0042] Among them, the ultrafiltration membrane filter element 2 is set as a hollow fiber membrane filter element, specifically made of polyethersulfone. The hollow fiber membrane filter element has hydrophilicity that is resistant to organic pollution and has strong filtering ability, and can effectively remove harmful substances such as bacteria, viruses, and microorganisms in water; and the forward flushing and backwashing of the hollow fiber membrane filter element will not damage its structure, thereby further extending the service life of the ultrafiltration membrane filter element 2. The reverse osmosis membrane filter element 4 can be set as a nanofiltration membrane or a RO reverse osmosis membrane, etc.

[0043] In addition, each solenoid valve can control the on-off of the corresponding pipeline; each electric valve can also control the on-off of the corresponding pipeline, and can also control the opening of the corresponding pipeline to control the flow rate of the liquid in the pipeline.

[0044] like Figure 1 to Figure 2As shown, the water system also includes a post-carbon filter element 8 disposed between the reverse osmosis membrane filter element 4 and the clean water port 12. When the water system produces water, raw water enters the water system through the raw water port 11, and passes through the ultrafiltration membrane filter element 2, the booster pump 3, the reverse osmosis membrane filter element 4 and the post-carbon filter element 8 in sequence. The raw water is filtered through the ultrafiltration membrane filter element 2, the reverse osmosis membrane filter element 4 and the post-carbon filter element 8 to form clean water, and the clean water flows out through the clean water port 12. The post-carbon filter element 8 can further filter the water filtered by the ultrafiltration membrane filter element 2 and the reverse osmosis membrane filter element 4, thereby improving the overall filtering effect of the water system and ensuring the safety of the clean water quality. Among them, the post-carbon filter element 8 can be set as a granular activated carbon filter element or a carbon rod filter element, etc.

[0045] like Figure 1 to Figure 2 As shown, the water system also includes a pressure switch 7 arranged on the pipeline between the reverse osmosis membrane filter element 4 and the second solenoid valve M2. The first electric valve Q1, the booster pump 3 and the first solenoid valve M1 are configured to be able to open or close corresponding to the water pressure detected by the pressure switch 7. When a post-carbon filter element 8 is provided, the pressure switch 7 is arranged on the pipeline between the post-carbon filter element 8 and the second solenoid valve M2. The pressure switch 7 is used to detect the water pressure on the corresponding pipeline. When the water system produces water, the second solenoid valve M2 is first controlled to open. When the pressure switch 7 detects that the water pressure is reduced, the first electric valve Q1, the booster pump 3 and the first solenoid valve M1 are controlled to open, and the water system starts to produce water; when the pressure switch 7 detects a preset high-pressure signal, the first electric valve Q1, the booster pump 3 and the first solenoid valve M1 are controlled to close, and the second solenoid valve M2 is controlled to close at the same time, and the water system stops producing water. Avoid danger caused by excessive water pressure inside the pipeline and ensure the safety of the water system.

[0046] Alternatively, the water system may be controlled to stop producing water after the water system has been working continuously for a preset time, wherein the preset time may be 5 hours, 6 hours, 7 hours, etc., to prevent the water system from being in working state for a long time.

[0047] like Figure 1 As shown, the water system also includes a first one-way valve 91 arranged on the pipeline between the post-carbon filter 8 and the pressure switch 7. The first one-way valve 91 allows the water in the pipeline to flow only from the post-carbon filter 8 toward the pressure switch 7, thereby preventing the water pressure at the pressure switch 7 from being too high and causing the water in the pipeline to flow back, thereby ensuring the normal operation of the water system.

[0048] like Figure 1 and Figure 4As shown, in one embodiment, the water system further includes a water tank 6 connected to the liquid inlet through a pipeline and a third electromagnetic valve M3 arranged on the pipeline between the water tank 6 and the gas-liquid mixing pump 5. When the ultrafiltration membrane filter element 2 is backwashed, the third electromagnetic valve M3, the gas-liquid mixing pump 5 and the second electric valve Q2 are all controlled to be open, the gas can enter the gas-liquid mixing pump 5 through the gas inlet, the water in the water tank 6 can enter the gas-liquid mixing pump 5 through the liquid inlet, and form bubble water after being mixed by the gas-liquid mixing pump 5, and the bubble water flows to the ultrafiltration membrane filter element 2 through the gas-liquid outlet to backwash the ultrafiltration membrane filter element 2, and the wastewater formed after flushing the ultrafiltration membrane filter element 2 is discharged through the first sewage port 13. The water tank 6 is used to store water and supply water for flushing the ultrafiltration membrane filter element 2.

[0049] like Figure 1 As shown, a solid cleaning agent 61 soluble in water is provided in the water tank 6. The solid cleaning agent 61 is slowly released when it meets water in the water tank 6 until the liquid in the water tank 6 is saturated to form a cleaning liquid in the water tank 6. Using the bubble water generated by the mixture of the cleaning liquid and the gas to backwash the ultrafiltration membrane filter element 2 can further improve the backwashing effect of the ultrafiltration membrane filter element 2, making the cleaning more thorough.

[0050] like Figure 1 As shown, a liquid level valve 62 is provided in the water tank 6, and the third solenoid valve M3 is configured to be opened or closed in response to the water level in the water tank 6 detected by the liquid level valve 62. The liquid level valve 62 detects the water level in the water tank 6 in real time. When the liquid level valve 62 detects that the water level in the water tank 6 reaches a preset low water level, it is necessary to first add water to the water tank 6, and then rinse the ultrafiltration membrane filter element 2 to ensure that there is enough water to rinse the ultrafiltration membrane filter element 2; when the liquid level valve 62 detects that the water level in the water tank 6 reaches a preset high water level, it stops adding water to the water tank 6 to avoid water overflow in the water tank 6. Thereby, the normal use of the water system can be ensured. Among them, the liquid level valve 62 can be set as a liquid level float valve, etc.

[0051] like Figure 1 and Figure 3As shown, the water tank 6 is connected to the pipeline between the reverse osmosis membrane filter element 4 and the second solenoid valve M2, and the water system also includes a fourth solenoid valve M4 arranged on the pipeline between the reverse osmosis membrane filter element 4 and the water tank 6. When a post-carbon filter element 8 is provided, the water tank 6 is connected to the pipeline between the reverse osmosis membrane filter element 4 and the post-carbon filter element 8. When water needs to be added to the water tank 6, the first electric valve Q1, the booster pump 3, the first solenoid valve M1 and the fourth solenoid valve M4 are all controlled to be opened, and the raw water enters the water system through the raw water port 11, and passes through the ultrafiltration membrane filter element 2, the booster pump 3 and the reverse osmosis membrane filter element 4 in turn. The raw water is filtered through the ultrafiltration membrane filter element 2 and the reverse osmosis membrane filter element 4 to form clean water, and the clean water flows into the water tank 6. The water used for backwashing the ultrafiltration membrane filter element 2 is purified water after filtration, which prevents impurities in the water from remaining on the ultrafiltration membrane filter element 2, thereby further improving the cleaning effect of the ultrafiltration membrane filter element 2 and making the ultrafiltration membrane filter element 2 thoroughly clean.

[0052] Of course, in other embodiments, the water tank 6 may be connected to an external water source, and when the liquid level valve 62 detects that the water level in the water tank 6 reaches a preset low water level, the external water source is controlled to add water to the water tank 6; when the liquid level valve 62 detects that the water level in the water tank 6 reaches a preset high water level, the external water source is controlled to stop adding water to the water tank 6. Alternatively, the liquid inlet of the gas-liquid mixing pump 5 may be directly connected to an external water source, and when the gas-liquid mixing pump 5 is working, water from the external water source enters the gas-liquid mixing pump 5 through the liquid inlet.

[0053] like Figure 1 and Figure 4 As shown, the water circuit system also includes an air inlet port 15 connected to the gas inlet of the gas-liquid mixing pump 5 and a second one-way valve 92 arranged on the pipeline between the air inlet port 15 and the gas-liquid mixing pump 5. When the gas-liquid mixing pump 5 is working, external gas can enter the water circuit system through the air inlet port 15 and enter the gas-liquid mixing pump 5 through the gas inlet. The second one-way valve 92 allows the gas in the pipeline to flow only from the air inlet port 15 toward the gas-liquid mixing pump 5, avoiding the gas or liquid in the water circuit system from flowing back when the gas-liquid mixing pump 5 is not working, thereby ensuring the normal operation of the water circuit system.

[0054] like Figure 1 and Figure 6As shown, the water system also includes a second sewage port 14 connected to the reverse osmosis membrane filter element 4 through a pipeline and a fifth solenoid valve M5 arranged on the pipeline between the reverse osmosis membrane filter element 4 and the second sewage port 14. When flushing the reverse osmosis membrane filter element 4, the gas-liquid mixing pump 5, the booster pump 3, the first solenoid valve M1 and the fifth solenoid valve M5 are controlled to open, the gas can enter the gas-liquid mixing pump 5 through the gas inlet, the cleaning liquid in the water tank 6 can enter the gas-liquid mixing pump 5 through the liquid inlet, and form bubble water after being mixed by the gas-liquid mixing pump 5, and the bubble water flows to the booster pump 3 and the reverse osmosis membrane filter element 4 through the gas-liquid outlet, so that the reverse osmosis membrane filter element 4 is flushed with bubble water, and the wastewater formed after flushing the reverse osmosis membrane filter element 4 is discharged through the second sewage port 14; after reaching the preset flushing time, the gas-liquid mixing pump 5, the booster pump 3, the first solenoid valve M1 and the fifth solenoid valve M5 are controlled to close, and the flushing is completed. Therefore, the reverse osmosis membrane filter element 4 can be flushed with bubble water to improve the cleaning effect of the reverse osmosis membrane filter element 4, so that the cleaning is thorough, thereby ensuring the filtering effect of the reverse osmosis membrane filter element 4 and extending the service life of the reverse osmosis membrane filter element 4 and the water system as a whole. Among them, the flushing times of the reverse osmosis membrane filter element 4 and the ultrafiltration membrane filter element 2 are consistent.

[0055] like Figure 1 and Figure 6 As shown, the water system also includes a third one-way valve 93 disposed on the pipeline between the fifth solenoid valve M5 and the second sewage port 14. The third one-way valve 93 allows the wastewater in the pipeline to flow only from the fifth solenoid valve M5 toward the second sewage port 14, thereby preventing the wastewater in the second sewage port 14 from flowing back to the reverse osmosis membrane filter element 4, thereby ensuring the normal operation of the water system.

[0056] Furthermore, before the first operation of the water system, it is necessary to flush the ultrafiltration membrane filter element 2, the reverse osmosis membrane filter element 4 and the internal pipelines of the water system. The first electric valve Q1, the booster pump 3, the first solenoid valve M1 and the second solenoid valve M2 are all controlled to be open, and water enters the water system through the raw water port 11, and passes through the ultrafiltration membrane filter element 2, the booster pump 3, the reverse osmosis membrane filter element 4 and the post-carbon filter element 8 in sequence, and then flows out through the clean water port 12. After the preset flushing time, the second solenoid valve M2 is controlled to be closed, and the fourth solenoid valve M4 is opened. Water enters the water system through the raw water port 11, and passes through the ultrafiltration membrane filter element 2, the booster pump 3, and the reverse osmosis membrane filter element 4 in sequence and then enters the water tank 6. When the liquid level valve 62 detects that the water level in the water tank 6 reaches the preset high water level, the fourth solenoid valve M4 is controlled to be closed. When the pressure switch 7 detects the preset high pressure signal, the first electric valve Q1, the booster pump 3 and the first solenoid valve M1 are controlled to be closed, and the water system stops working. This ensures that the water tank 6 is filled with clean water before the water system is operated for the first time.

[0057] The embodiment of the utility model further provides a water purifier, comprising the above-mentioned water system.

[0058] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A water system, comprising a raw water port (11), an ultrafiltration membrane filter element (2), a booster pump (3), a reverse osmosis membrane filter element (4) and a clean water port (12) which are sequentially connected through a pipeline, the water system further comprising a first electric valve (Q1) arranged on the pipeline between the raw water port (11) and the ultrafiltration membrane filter element (2), a first solenoid valve (M1) arranged on the pipeline between the booster pump (3) and the reverse osmosis membrane filter element (4), and a second solenoid valve (M2) arranged on the pipeline between the reverse osmosis membrane filter element (4) and the clean water port (12), characterized in that: The waterway system also includes: A first sewage port (13) is connected to the ultrafiltration membrane filter element (2) through a pipeline; a second electric valve (Q2), arranged on the pipeline between the ultrafiltration membrane filter element (2) and the first sewage port (13); and The gas-liquid mixing pump (5) is provided with a gas inlet, a liquid inlet and a gas-liquid outlet, and the gas-liquid outlet is connected to the pipeline between the ultrafiltration membrane filter element (2) and the booster pump (3).

2. The waterway system according to claim 1, characterized in that: The water system further comprises a water tank (6) connected to the liquid inlet via a pipeline, and a third solenoid valve (M3) arranged on the pipeline between the water tank (6) and the gas-liquid mixing pump (5).

3. The waterway system according to claim 2, characterized in that: The water tank (6) is provided with a solid cleaning agent (61) that is soluble in water.

4. The waterway system according to claim 2, characterized in that: A liquid level valve (62) is provided in the water tank (6), and the third solenoid valve (M3) is configured to be opened or closed in response to the water level in the water tank (6) detected by the liquid level valve (62).

5. The waterway system according to claim 2, characterized in that: The water tank (6) is connected to the pipeline between the reverse osmosis membrane filter element (4) and the second solenoid valve (M2), and the water system also includes a fourth solenoid valve (M4) arranged on the pipeline between the reverse osmosis membrane filter element (4) and the water tank (6).

6. The waterway system according to claim 1, characterized in that: The water system further comprises a second sewage port (14) connected to the reverse osmosis membrane filter element (4) via a pipeline, and a fifth solenoid valve (M5) arranged on the pipeline between the reverse osmosis membrane filter element (4) and the second sewage port (14).

7. The waterway system according to claim 1, characterized in that: The water system further comprises a pressure switch (7) arranged on the pipeline between the reverse osmosis membrane filter element (4) and the second solenoid valve (M2); the first electric valve (Q1), the booster pump (3) and the first solenoid valve (M1) are configured to be opened or closed in response to the water pressure detected by the pressure switch (7).

8. The waterway system according to claim 1, characterized in that: The water system further comprises a post-carbon filter element (8) arranged between the reverse osmosis membrane filter element (4) and the water purification port (12).

9. The waterway system according to any one of claims 1 to 8, characterized in that: The ultrafiltration membrane filter element (2) is configured as a hollow fiber membrane filter element.

10. A water purifier, characterized in that: Comprising the waterway system as described in any one of claims 1-9.

Images