Water purifier and working method thereof

Abstract

The invention relates to a water purifier and a working method thereof.The water purifier comprises a first pipeline, one end of the first pipeline is a water inlet end, the first pipeline is connected to a water inlet of a membrane structure through a second pipeline, a pretreatment water inlet switch is arranged on the first pipeline, and a booster pump and at least one first pretreatment filter element are arranged on the second pipeline; a first water outlet of the membrane structure is connected to a floor drain sewer through a wastewater ratio electromagnetic valve, a second water outlet of the membrane structure is connected to the floor drain sewer through a third pipeline, the second water outlet of the membrane structure is connected with one end of a first branch through a second check valve, and the other end of the first branch is connected to a second pipeline on the upstream of the booster pump; an outlet of the second check valve is connected to the water storage container. According to the working method, the labor cost is effectively saved, ineffective expenditure is avoided, the problem that water is not fresh due to various small, long and fake water is effectively solved, and meanwhile the water quality of customers is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of water purifiers, and in particular relates to a water purifier and a working method of the water purifier. Background Art

[0002] As people's awareness of healthy drinking water continues to grow, water purifiers are becoming increasingly common in homes and offices. However, many users lack awareness of the importance of cleaning the protective fluid in the reverse osmosis membrane during new installation and secondary filter cartridge replacement, or they employ incorrect operating procedures. This can lead to reduced filtration effectiveness and even pose health risks.

[0003] In addition, some after-sales technicians fail to clean the filter element thoroughly manually when installing a new machine or replacing the filter element for the second time due to being in a hurry, which causes problems such as odor and foam in the water output of the water purifier, causing great communication costs for customers and dealers.

[0004] Therefore, a water purifier that can optimize the disadvantages of the prior art is needed. Summary of the Invention

[0005] In order to solve all or part of the above problems, the purpose of the present invention is to provide a water purifier and a working method of the water purifier. The working method of the present invention effectively saves labor costs, avoids ineffective expenditures, effectively solves the problem of stale water caused by various short holidays, and at the same time ensures the water quality of customers.

[0006] According to one aspect of the present invention, a water purifier is provided, comprising a first pipeline, one end of the first pipeline being a water inlet end, the other end of the first pipeline being connected to a water inlet of a membrane structure through a second pipeline, a pretreatment water inlet switch being provided on the first pipeline, a booster pump and at least one first pretreatment filter element being provided on the second pipeline, a first water outlet of the membrane structure being connected to a floor drain through a wastewater ratio solenoid valve, and a flow rate of wastewater flowing into the floor drain through the wastewater ratio solenoid valve when the wastewater ratio solenoid valve is in an open state being greater than a flow rate of wastewater flowing into the floor drain through the wastewater ratio solenoid valve when the wastewater ratio solenoid valve is in a closed state. The flow rate in the state; the second water outlet of the membrane structure is connected to the floor drain through a third pipeline, and a normally closed solenoid valve three and a check valve one are provided on the third pipeline. The second water outlet of the membrane structure is connected to the inlet of the check valve two, and the outlet of the check valve two is connected to one end of the first branch, and a check valve three and a normally closed solenoid valve two are provided on the first branch. The other end of the first branch is connected to the second pipeline upstream of the booster pump, and the outlet of the check valve two is connected to a water storage container. The inlets of the check valve one and the check valve three are both arranged close to the second water outlet of the membrane structure.

[0007] Furthermore, the pretreatment water inlet switch includes a normally closed solenoid valve and a low-pressure switch; a second pretreatment filter element and a water inlet three-way valve are also provided on the first pipeline; and the membrane structure is a reverse osmosis membrane or a nanofiltration membrane.

[0008] Furthermore, the water storage container includes a first water storage container, and the outlet of the second check valve is connected to the first water storage container via a two-way solenoid valve; and / or, the water storage container includes a second water storage container, and the outlet of the second check valve is connected to the inlet of the second water storage container via a second branch, and the second branch is provided with a high-pressure switch and a normally open solenoid valve; When the water storage container includes a first water storage container and a second water storage container, the inlet of the second water storage container is connected to the first water storage container through a normally closed solenoid valve 9.

[0009] Furthermore, a first flow meter is provided on the second pipeline between the connection point between the first branch and the second pipeline and the boost pump, or a first flow meter is provided on the second pipeline downstream of the boost pump.

[0010] The present invention also provides a working method of a water purifier, using the water purifier described above, the working method includes a first flushing process, a second flushing process, an emptying process, a water production process, a power-on process and a full water process, specifically: When executing the first flushing process: the pretreatment water inlet switch is closed, the wastewater ratio solenoid valve and the normally closed solenoid valve 3 are energized and opened, the normally closed solenoid valve 2 remains de-energized, the booster pump is started, and the water flow from the water inlet is discharged from the first water outlet and the second water outlet of the membrane structure to the floor drain; When executing the second flushing process: the pretreatment water inlet switch is closed, the normally closed solenoid valve three is energized and opened, the wastewater ratio solenoid valve and the normally closed solenoid valve two are de-energized, the booster pump is started, and the water flow at the water inlet is discharged from the first water outlet and the second water outlet of the membrane structure to the floor drain; When the emptying process is executed, the pre-treatment water inlet switch is disconnected, the normally closed solenoid valve 3 is de-energized, the normally closed solenoid valve 2 and the wastewater ratio solenoid valve are energized and opened, the booster pump is started, and the water in the water storage container is discharged from the floor drain through the normally closed solenoid valve 2 and the wastewater ratio solenoid valve; When the water production process is executed, the pretreatment water inlet switch is closed, the normally closed solenoid valve 2, the normally closed solenoid valve 3 and the wastewater ratio solenoid valve are de-energized, the normally closed solenoid valve 4 is energized and opened, the booster pump is started, and the water flow at the water inlet passes through the membrane structure to produce pure water, which enters the water storage container through its second water outlet. The wastewater generated in the water production process is discharged from the floor drain through the wastewater ratio solenoid valve; When the power-on process is executed, the pre-treatment water inlet switch is closed, the wastewater ratio solenoid valve is energized and opened, the normally closed solenoid valve 2 and the normally closed solenoid valve 3 are de-energized, and the booster pump is started; When executing the full water process, the pretreatment water inlet switch is closed, the booster pump is started, the wastewater ratio solenoid valve is energized and opened, the normally closed solenoid valve three and the normally closed solenoid valve two are de-energized, and the water purifier enters the full water standby state.

[0011] Furthermore, when the water storage container includes a first water storage container and a second water storage container, and the outlet of the second check valve is connected to the first water storage container via a two-way solenoid valve, the outlet of the second check valve is connected to the inlet of the second water storage container via a second branch, a high-pressure switch and a normally open solenoid valve are provided on the second branch, and the inlet of the second water storage container is connected to the first water storage container via a normally closed solenoid valve 4, the emptying process includes a first emptying process and a second emptying process, specifically: When executing the first emptying process, the pretreatment water inlet switch is disconnected, the normally closed solenoid valve 3, the normally open solenoid valve, the normally closed solenoid valve 4 and the two-way solenoid valve are de-energized, the normally closed solenoid valve 2 and the wastewater ratio solenoid valve are energized and opened, the booster pump is started, and the high-pressure water in the second water storage container is discharged from the floor drain through the high-pressure switch, the normally open solenoid valve, the normally closed solenoid valve 2 and the wastewater ratio solenoid valve; When executing the second emptying process, the pretreatment water inlet switch is disconnected, and the states of the booster pump, normally closed solenoid valve 2, wastewater ratio solenoid valve, normally closed solenoid valve 3, normally open solenoid valve and normally closed solenoid valve 4 are the same as those corresponding to the first emptying process. The two-way solenoid valve is energized and opened, and the water in the water storage container is discharged from the floor drain through the two-way solenoid valve, normally closed solenoid valve 2 and wastewater ratio solenoid valve; When executing the water production process, the pretreatment water inlet switch is closed, the normally closed solenoid valve 2, the normally closed solenoid valve 3, the normally open solenoid valve, the two-way solenoid valve and the wastewater ratio solenoid valve are de-energized, the normally closed solenoid valve 4 is energized and opened, the booster pump is started, and the water flow at the water inlet passes through the membrane structure to produce pure water. The pure water enters the first water storage container through its second water outlet, the high-pressure switch, the normally open solenoid valve and the normally closed solenoid valve 4. After the liquid level in the first water storage container reaches the set liquid level, the normally closed solenoid valve 4 is de-energized, and the pure water switches to enter the second water storage container. The wastewater generated in the water production process is discharged from the floor drain through the wastewater ratio solenoid valve; And: when executing the first flushing process and the second flushing process: the normally open solenoid valve is energized and opened, and the normally closed solenoid valve four and the two-way solenoid valve remain de-energized; when executing the power-on process, the normally open solenoid valve and the two-way solenoid valve are de-energized, and the state of the normally closed solenoid valve four is determined by the liquid level in the water storage container; when executing the full water process, the two-way solenoid valve, the normally open solenoid valve and the normally closed solenoid valve four are de-energized.

[0012] Furthermore, for a membrane structure used for the first time, the working method includes: Executing the first flushing process within a first preset time; After the first flushing process is completed, the second flushing process is executed, and the execution time of the second flushing process is a second preset time; After the second flushing process is completed, the first emptying process is executed, and the execution time of the first emptying process is a third preset time; After the first emptying process is completed, the water production process is executed until the second water storage container is full of water and the high-pressure switch trips; After the water production process is completed, the full water process is executed and the water purifier enters a full water standby state.

[0013] Furthermore, for the case where the interval between two water production processes is greater than the set time, or the water quality does not meet the requirements, the working method includes: executing the first emptying process within a fourth preset time; and / or executing the second emptying process within a fifth preset time; Executing the water production process until the second water storage container is full of water and the high-pressure switch trips; After the water production process is completed, the full water process is executed and the water purifier enters a full water standby state.

[0014] Furthermore, for the water purifier in use, the working method includes: After the device is powered on again, the power-on process is executed; After the power-on process is completed, the water production process is continued until the second water storage container is full of water and the high-pressure switch trips; After the water production process is completed, the full water process is executed and the water purifier enters a full water standby state.

[0015] Furthermore, the method further includes a third flushing process, specifically, When executing the third flushing process, the pretreatment water inlet switch is turned on, the wastewater ratio solenoid valve is energized and opened, the normally closed solenoid valve 2, the normally closed solenoid valve 3, the normally open solenoid valve and the two-way solenoid valve are de-energized, the booster pump is started, and the state of the normally closed solenoid valve 4 is determined by the liquid level in the first water storage container; During the execution of the water production process, the third flushing process is executed, and the execution time of the third flushing process is a sixth preset time.

[0016] Furthermore, the working method further includes a circulation process, wherein the circulation process is executed if no water is used within a set time while the water purifier enters the full water standby state; When executing the circulation process, the pretreatment water inlet switch is closed, the wastewater ratio solenoid valve is energized and opened, the normally closed solenoid valve 2, the normally closed solenoid valve 4, the normally closed solenoid valve 3, the normally open solenoid valve and the two-way solenoid valve are de-energized, the booster pump is started, and the water flow at the water inlet is discharged from the first water outlet of the membrane structure to the floor drain; After the cycle process is completed, the water purifier enters the full water standby state again; The execution time of the loop process is the seventh preset time.

[0017] Furthermore, a first flow meter is provided on the second pipeline between the connection between the first branch and the second pipeline and the boost pump, or a first flow meter is provided on the second pipeline downstream of the boost pump, and the first flow meter is used to detect the flow rate of water passing through the second pipeline.

[0018] Furthermore, for a membrane structure used for the first time, the working method includes: executing the first flushing process, wherein the execution time of the first flushing process is determined by the water flow through the first flow meter and the corresponding first preset volume; After the first flushing process is completed, the second flushing process is executed, and the execution time of the second flushing process is determined by the water flow through the first flow meter and the corresponding second preset volume; After the second flushing process is completed, the first emptying process is executed, and the execution time of the first emptying process is determined by the water flow through the first flow meter and the corresponding third preset volume; After the first emptying process is completed, the water production process is executed until the second water storage container is full of water and the high-pressure switch trips; After the water production process is completed, the full water process is executed and the water purifier enters a full water standby state.

[0019] Furthermore, for the case where the interval between two water production processes is greater than the set time, or the water quality does not meet the requirements, the working method includes: executing the first emptying process, wherein the execution time of the first emptying process is determined by the water flow through the first flow meter and the corresponding fourth preset volume; and / or executing the second emptying process, wherein the execution time of the second emptying process is determined by the water flow through the first flow meter and the corresponding fifth preset volume; Executing the water production process until the second water storage container is full of water and the high-pressure switch trips; After the water production process is completed, the full water process is executed and the water purifier enters a full water standby state.

[0020] Furthermore, for the water purifier in use, the working method includes: After the device is powered on again, the power-on process is executed; After the power-on process is completed, the water production process is executed until the second water storage container is full of water and the high-pressure switch trips; After the water production process is completed, the full water process is executed and the water purifier enters a full water standby state.

[0021] Furthermore, the method further includes a third flushing process, specifically, When executing the third flushing process, the pretreatment water inlet switch is turned on, the wastewater ratio solenoid valve is energized and opened, the normally closed solenoid valve 2, the normally closed solenoid valve 3, the normally open solenoid valve and the two-way solenoid valve are de-energized, the booster pump is started, and the state of the normally closed solenoid valve 4 is determined by the liquid level in the first water storage container; During the execution of the water production process, the third flushing process is executed, and the execution time of the third flushing process is determined by the water flow through the first flow meter and the corresponding sixth preset volume.

[0022] Furthermore, the working method further includes a circulation process, wherein the circulation process is executed if no water is used within a set time while the water purifier enters the full water standby state; When executing the circulation process, the pretreatment water inlet switch is closed, the wastewater ratio solenoid valve is opened, the normally closed solenoid valve 2, the normally closed solenoid valve 4, the normally closed solenoid valve 3, the normally open solenoid valve and the two-way solenoid valve are closed, the booster pump is started, and the water flow at the water inlet end is discharged from the first water outlet of the membrane structure to the floor drain; After the cycle process is completed, the water purifier enters the full water standby state again; The execution time of the cycle process is determined by the water flow through the first flow meter and the corresponding seventh preset volume.

[0023] It can be seen from the above technical solution that the water purifier and the working method of the water purifier provided by the present invention have the following beneficial effects: The working method of the present invention can realize intelligent flushing of reverse osmosis or nanofiltration membranes; at the same time, the embodiment of the present invention can complete emptying more intelligently, including the emptying of the second water storage container and the emptying of the first water storage container; therefore, the working method of the embodiment of the present invention effectively saves labor costs and avoids ineffective expenditures.

[0024] The working method of the present invention realizes the emptying function during holidays or after water pollution, effectively solves the problem of stale water caused by various short holidays, and at the same time ensures the water quality of customers. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1Schematic diagram of a time-type water purifier according to an embodiment of the present invention, Figure 1 Two first pre-treatment filter elements are provided. According to the flow direction of water during water production, the booster pump is located upstream of the two first pre-treatment filter elements, and the pipeline where the normally closed solenoid valve 2 is located is connected to the upstream of the booster pump; Figure 2 Schematic diagram of a time-type water purifier according to an embodiment of the present invention, Figure 2 Two first pre-treatment filter elements are provided. According to the flow direction of water during water production, the booster pump is located between the two first pre-treatment filter elements, and the pipeline where the normally closed solenoid valve 2 is located is connected to the upstream of the first pre-treatment filter element upstream of the two first pre-treatment filter elements; Figure 3 Schematic diagram of a time-type water purifier according to an embodiment of the present invention, Figure 3 Two first pre-treatment filter elements are provided. According to the flow direction of water during water production, the booster pump is located between the two first pre-treatment filter elements, and the pipeline where the normally closed solenoid valve 2 is located is connected to the booster pump and the first pre-treatment filter element upstream thereof; Figure 4 Schematic diagram of a time-type water purifier according to an embodiment of the present invention, Figure 4 Two first pre-treatment filter elements are provided. According to the flow direction of water during water production, the booster pump is located downstream of the two first pre-treatment filter elements, and the pipeline where the normally closed solenoid valve 2 is located is connected between the two first pre-treatment filter elements; Figure 5 Schematic diagram of a time-type water purifier according to an embodiment of the present invention, Figure 5 Two first pre-treatment filter elements are provided. According to the flow direction of water during water production, the booster pump is located downstream of the two first pre-treatment filter elements, and the pipeline where the normally closed solenoid valve 2 is located is connected between the booster pump and the first pre-treatment filter element upstream thereof; Figure 6 Schematic diagram of a flow-type water purifier according to an embodiment of the present invention, Figure 6 Two first pre-treatment filter elements are provided. According to the flow direction of water during water production, the booster pump is located upstream of the two first pre-treatment filter elements. The first flow meter is provided upstream of the booster pump, and the pipeline where the normally closed solenoid valve 2 is located is connected to the upstream of the first flow meter. Figure 7 Schematic diagram of a flow-type water purifier according to an embodiment of the present invention, Figure 7 Two first pre-treatment filter elements are provided. According to the flow direction of water during water production, the booster pump is located between the two first pre-treatment filter elements. The first flow meter is provided upstream of the first pre-treatment filter element upstream of the two first pre-treatment filter elements, and the pipeline where the normally closed solenoid valve 2 is located is connected to the upstream of the first flow meter. Figure 8 Schematic diagram of a flow-type water purifier according to an embodiment of the present invention, Figure 8Two first pre-treatment filter elements are provided. According to the flow direction of water during water production, the booster pump is located between the two first pre-treatment filter elements. The first flow meter is provided between the booster pump and the first pre-treatment filter element upstream thereof. The pipeline where the normally closed solenoid valve 2 is located is connected to the upstream of the first pre-treatment filter element upstream of the first flow meter. Figure 9 Schematic diagram of a flow-type water purifier according to an embodiment of the present invention, Figure 9 Two first pre-treatment filter cartridges are provided. According to the flow direction of water during water production, the booster pump is located between the two first pre-treatment filter cartridges. The first flow meter is provided between the booster pump and the first pre-treatment filter cartridge upstream thereof. The pipeline where the normally closed solenoid valve 2 is located is connected to the first flow meter and the first pre-treatment filter cartridge upstream thereof. Figure 10 Schematic diagram of a flow-type water purifier according to an embodiment of the present invention, Figure 10 Two first pre-treatment filter cartridges are provided. According to the flow direction of water during water production, the booster pump is located downstream of the two first pre-treatment filter cartridges. The first flow meter is provided between the two first pre-treatment filter cartridges, and the pipeline where the normally closed solenoid valve 2 is located is connected between the first flow meter and the first pre-treatment filter cartridge upstream thereof. Figure 11 Schematic diagram of a flow-type water purifier according to an embodiment of the present invention, Figure 11 Two first pre-treatment filter elements are provided. According to the flow direction of water during water production, the booster pump is located downstream of the two first pre-treatment filter elements. The first flow meter is provided between the booster pump and the first pre-treatment filter element upstream thereof. The pipeline where the normally closed solenoid valve 2 is located is connected between the two first pre-treatment filter elements. Figure 12 Schematic diagram of a flow-type water purifier according to an embodiment of the present invention, Figure 12 Two first pre-treatment filter cartridges are provided. According to the flow direction of water during water production, the booster pump is located downstream of the two first pre-treatment filter cartridges. The first flow meter is provided between the booster pump and the first pre-treatment filter cartridge upstream thereof. The pipeline where the normally closed solenoid valve 2 is located is connected between the first flow meter and the first pre-treatment filter cartridge upstream thereof. Figure 13 A schematic diagram of water flow when the water purifier performs the first flushing process and the second flushing process; Figure 14 This is a schematic diagram of the water flow when the water purifier performs the first emptying process; Figure 15 Schematic diagram of water flow when the water purifier performs the second emptying process; Figure 16 This is a schematic diagram of the water flow when the water purifier performs the water production process; Figure 17 Schematic diagram of water flow when the water purifier performs power-on, third flush and circulation processes. DETAILED DESCRIPTION

[0026] In order to better understand the purpose, structure and function of the present invention, a water purifier and a working method of the water purifier of the present invention are further described in detail below with reference to the accompanying drawings.

[0027] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0028] All components involved in the embodiments of the present invention can be replaced with components with similar functions in the industry, and similar results can be produced by replacing components in different positions in the waterway; therefore, based on this structure, related products of the invention are protected by replacing components or replacing components in different positions in the waterway.

[0029] like Figure 1 As shown, it shows a water purifier of an embodiment of the present invention, which includes a first pipeline, one end of the first pipeline is a water inlet end, and the other end of the first pipeline is connected to the water inlet of the membrane structure 11 through a second pipeline, and a pretreatment water inlet switch 01 is provided on the first pipeline, and a booster pump 6 and at least one first pretreatment filter element 9 are provided on the second pipeline.

[0030] The first pre-treatment filter element is used to pre-treat the water flowing through it. In specific implementation, it can be set as at least one, such as two or three, as needed. Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 There are two first pre-treatment filter elements. When more than one first pre-treatment filter element is provided, the position between the first pre-treatment filter element and the booster pump 6 can be adjusted arbitrarily, for example: Figure 1 The middle boost pump 6 is located upstream of the two first pre-treatment filter elements. Figure 2 and Figure 3 The middle boost pump 6 is between the two first pre-treatment filter elements. Figure 4 and Figure 5 The middle boost pump 6 is located downstream of the two first pre-processing filter elements. Regarding the boost pump 6 and the first pre-processing filter elements, it is sufficient that the first pre-processing filter elements and the boost pump 6 are both located on the second pipeline.

[0031] The membrane structure of this embodiment is a reverse osmosis membrane or a nanofiltration membrane.

[0032] The first water outlet of the membrane structure 11 is connected to the floor drain 13 through the wastewater ratio solenoid valve 12. When the wastewater ratio solenoid valve is in the open state, the flow rate of the wastewater flowing into the floor drain 13 through the wastewater ratio solenoid valve is greater than the flow rate when the wastewater ratio solenoid valve is in the closed state; the second water outlet of the membrane structure is connected to the floor drain 13 through the third pipeline. The third pipeline is provided with a normally closed solenoid valve three 16 and a check valve one 17. The inlet of the check valve one 17 is set close to the second water outlet of the membrane structure.

[0033] Regarding the wastewater ratio solenoid valve 12, when it is open, the flow rate of wastewater flowing into the floor drain through the wastewater ratio solenoid valve is greater than the corresponding flow rate when it is closed, so it can be used to pressurize the membrane structure. In this embodiment, the check valve 17 is provided to ensure unidirectional flow of water in the third pipeline.

[0034] The second water outlet of the membrane structure is connected to the inlet of the check valve 2 15, the outlet of the check valve 2 15 is connected to one end of the first branch, the first branch is provided with a check valve 3 7 and a normally closed solenoid valve 2 8, the other end of the first branch is connected to the second pipeline upstream of the booster pump 6, the outlet of the check valve 2 15 is connected to the water storage container, and the inlets of the check valve 1 17 and the check valve 3 7 are both arranged close to the second water outlet of the membrane structure.

[0035] During specific implementation, a second flow meter 14 can be set as needed to monitor the flow of water. One end of the second flow meter 14 is connected to the outlet of the second check valve 15, and the other end of the second flow meter 14 is connected to one end of the first branch.

[0036] The water storage container includes a first water storage container 21, and the outlet of the second check valve 15 is connected to the first water storage container 21 through a two-way solenoid valve 10; and / or the water storage container includes a second water storage container 20, and the outlet of the second check valve 15 is connected to the inlet of the second water storage container 20 through a second branch, and the second branch is provided with a high-pressure switch 18 and a normally open solenoid valve 19; When the water storage container includes a first water storage container 21 and a second water storage container 20, the inlet of the second water storage container 20 and the first water storage container 21 are connected via a normally closed solenoid valve 22.

[0037] Again, for the first water storage container of this embodiment, its water outlet can be connected to the water outlet pipe as needed; when cold water and hot water are needed, the water outlet can be connected to the hot water outlet pipe and the cold water outlet pipe respectively. For example, the water outlet of the first water storage container is connected to one end of the tee, and the other two ends of the tee are connected to the hot water outlet pipe and the cold water outlet pipe respectively. The hot water outlet pipe and the cold water outlet pipe are respectively provided with corresponding water outlet solenoid valves. At the same time, a heating device is provided on the hot water outlet pipe, and the outlet water is heated by the heating device to become hot water. The heating device is, for example, a hot water tank. As an alternative, the tee can be replaced with a four-way valve, and the extra end of the four-way valve after replacing the tee is connected to the pipeline between the two-way solenoid valve 10 and the first water storage container 21; finally, sterilization equipment can be installed as needed on the connecting pipelines of the first water storage container, the four-way valve and the pipeline between the two-way solenoid valve 10 and the first water storage container 21, such as an ultraviolet sterilization lamp, an EDOG sterilizer, etc.

[0038] In this embodiment, the booster pump 6 is used to provide power for the water flow. For the intersection of the first branch and the second pipeline, it is sufficient that the other end of the first branch is connected to the second pipeline upstream of the booster pump 6, such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 shown.

[0039] In this embodiment, the second check valve 15 and the third check valve 7 are used to achieve unidirectional flow of water in the corresponding pipelines to prevent the water from flowing backward.

[0040] The pre-treatment water inlet switch 01 includes a normally closed solenoid valve 14. A second pre-treatment filter element 3 is also installed on the first pipeline. This second pre-treatment filter element 3 is located upstream of the normally closed solenoid valve 14, and a low-pressure switch 2 is located upstream of the second pre-treatment filter element 3. This second pre-treatment filter element 3 is used to filter sediment and other materials from the tap water, thereby protecting the normally closed solenoid valve 14 downstream of the second pre-treatment filter element 3.

[0041] One end of the first pipeline is connected to the first end of the water inlet three-way valve 1, the second end of the water inlet three-way valve is connected to the tap water inlet end, and the third end of the water inlet three-way valve is connected to the tap water outlet.

[0042] For the water inlet three-way valve 1, its first end is connected to the tap water inlet, and the second end is connected to the first pipeline. Through the connection between the first and second ends of the water inlet three-way valve 1, water can flow into the first pipeline, and its third end is used to be connected to the tap water outlet. Through the connection between the first and third ends of the water inlet three-way valve 1, tap water can be released through the tap water outlet.

[0043] The membrane structure 11 in the embodiment of the present invention is a reverse osmosis membrane or a nanofiltration membrane.

[0044] The water purifier of this embodiment is a time-type water purifier, that is, its water production, flushing and other processes are controlled by preset time. As an alternative, it can also be set to a flow type, that is, its water production, flushing and other processes are controlled by preset water volume and water flow rate.

[0045] For flow-type water purifiers, a first flow meter 5 is set on the second pipeline between the connection between the first branch and the second pipeline and the inlet of the booster pump 6, or a first flow meter 5 is set on the second pipeline downstream of the booster pump 6. The first flow meter 5 is used to detect the flow rate of water passing through the second pipeline, so that the flow rate detected by the first flow meter is combined with the corresponding preset water flow volume to obtain the corresponding time for the flow-type water purifier to execute each process.

[0046] For the flow type water purifier, it is explained again as follows: Combined with the change of the position of the booster pump 6 and the first pre-treatment filter element, the connection between the first branch and the second pipe is also Figure 6 The change of the position of A in the embodiment can be as follows: Figure 6-Figure 12 Various structures. Figure 6-Figure 12 : Figure 6 The middle boost pump is located upstream of the two first pre-treatment filter elements, and the first flow meter 5 is between point A and the inlet of the boost pump; Figure 7 In the figure, the booster pump is between the two first pre-treatment filter elements, and the first flow meter 5 is between point A and the upstream first pre-treatment filter element; Figure 8 In the embodiment, the booster pump is between the two first pre-treatment filter elements, and the first flow meter 5 is between the upstream first pre-treatment filter element and the booster pump; Figure 9 In the figure, the booster pump is between the two first pre-treatment filter elements, and the first flow meter 5 is between point A and the inlet of the booster pump; Figure 10 In the embodiment, the booster pump is located downstream of the two first pre-treatment filter elements, and the first flow meter 5 is located between point A and the downstream first pre-treatment filter elements; Figure 11 In the figure, the booster pump is located downstream of the two first pre-treatment filter elements, A is located between the two first pre-treatment filter elements, and the first flow meter 5 is located between the downstream first pre-treatment filter element and the booster pump; Figure 12 In the figure, the booster pump is located downstream of the two first pre-treatment filter elements, and the first flow meter 5 is located between point A and the inlet of the booster pump. Figure 6-Figure 12 All of these structures are within the protection scope of the embodiments of the present invention.

[0047] The embodiment of the present invention also provides a working method of a water purifier, wherein the water purifier is the aforementioned Figure 6-Figure 12 Corresponding flow type water purifier or Figure 1-Figure 5The corresponding time-type water purifier, specifically, its working method includes the first flushing process, the second flushing process, the emptying process, the water production process, the power-on process and the full water process. The specific description of each process is as follows: When executing the first flushing process: the pretreatment water inlet switch 01 is closed to allow the water flow at the water inlet end to pass through, the wastewater ratio solenoid valve 12 and the normally closed solenoid valve three 16 are energized and opened, and the wastewater ratio solenoid valve 12 and the normally closed solenoid valve three 16 are energized and opened to allow water to flow through, the normally closed solenoid valve two 8 remains de-energized to prevent water from passing through, and the booster pump 6 is started to pump water.

[0048] For the first flushing process, such as Figure 13 As shown, after booster pump 6 is activated, water from the water inlet passes through pretreatment water inlet switch 01, booster pump 6, and the first pretreatment filter element before entering the membrane structure. The water entering the membrane structure is used to flush the membrane structure with protective liquid. Ultimately, part of the wastewater is discharged from its first outlet through wastewater solenoid valve 12 and into the floor drain, while the remaining part is discharged through normally closed solenoid valve 3 16 and check valve 1 17 and into the floor drain. For this process, the provision of normally closed solenoid valve 2 8 prevents water from contaminating other pipelines.

[0049] When executing the second flushing process: the pre-treatment water inlet switch 01 is closed to allow the water flow at the water inlet end to pass through, and the normally closed solenoid valve three 16 is energized and opened. After the normally closed solenoid valve three 16 is energized and opened, water can be allowed to pass through. After being energized and opened, no water flow is allowed to pass through. The wastewater ratio solenoid valve 12 and the normally closed solenoid valve 2 8 are de-energized. After the wastewater ratio solenoid valve 12 is de-energized, the flow rate of the water flowing into the floor drain through it is reduced, and the booster pump 6 is started to pump water.

[0050] For the second flushing process, such as Figure 13 As shown, after booster pump 6 is activated, water from the water inlet passes through pretreatment water inlet switch 01, booster pump 6, and the first pretreatment filter element before entering the membrane structure. The water entering the membrane structure is used to flush the membrane structure with protective fluid. Ultimately, part of the wastewater is discharged from its first outlet through wastewater ratio solenoid valve 12 and into the floor drain, while the remaining part is discharged from the floor drain through normally closed solenoid valve 3 16 and check valve 1 17. Because wastewater ratio solenoid valve 12 is de-energized, it further pressurizes the membrane structure, further flushing away the protective fluid from the membrane structure. For this process, the provision of normally closed solenoid valve 2 8 prevents water from contaminating other pipelines.

[0051] When the emptying process is executed, the pre-treatment water inlet switch 01 is disconnected, the normally closed solenoid valve 3 16 is de-energized, the normally closed solenoid valve 2 8 and the wastewater ratio solenoid valve 12 are energized and opened, the booster pump 6 is started, and the water in the water storage container is discharged from the floor drain through the normally closed solenoid valve 2 8 and the wastewater ratio solenoid valve 12; When executing the water production process, the pretreatment water inlet switch 01 is closed to allow the water flow at the water inlet end to pass through, the normally closed solenoid valve 2 8 and the normally closed solenoid valve 3 16 are de-energized so that the water flow cannot pass through the corresponding solenoid valves, the wastewater ratio solenoid valve 12 is de-energized to reduce the water flow speed passing through it, and the booster pump is started to pump the water flow at the water inlet end to the direction of the membrane structure.

[0052] When the power-on process is executed, the pre-treatment water inlet switch 01 is closed to allow the water flow at the water inlet end to pass through, the wastewater ratio solenoid valve 12 is energized and opened, the normally closed solenoid valve 2 8 and the normally closed solenoid valve 3 16 are de-energized, and the booster pump 6 is started.

[0053] In the power-on process, if Figure 17 As shown, the water flow at the water inlet end enters the membrane structure through the pretreatment water inlet switch 01, the booster pump and the first pretreatment filter element 9 to flush the membrane structure, and the wastewater generated by the flushing flows into the floor drain through the wastewater ratio solenoid valve 12.

[0054] When executing the full water process, the pretreatment water inlet switch 01 is closed to allow the water flow at the water inlet end to pass through, the booster pump 6 is started, the wastewater ratio solenoid valve 12 is energized and opened, the normally closed solenoid valve three 16 and the normally closed solenoid valve two 8 are de-energized, and the water purifier enters the full water standby state.

[0055] Each of the aforementioned processes involves the state change of the pre-treatment water inlet switch 01. The pre-treatment water inlet switch 01 is now explained as follows: The pre-treatment water inlet switch 01 is explained as follows: In this embodiment, when the pre-treatment water inlet switch is closed, the water flow at the water inlet end can enter the inlet of the booster pump through the pre-treatment water inlet switch. When the pre-treatment water inlet switch is disconnected, the water flow at the water inlet end cannot enter the inlet of the booster pump through it. In flow-type water purifiers and time-type water purifiers, the pre-treatment water inlet switch includes a normally closed solenoid valve 1 and a low-pressure switch. The low-pressure switch closes when the tap water pressure is greater than 0.1MPa, allowing water to pass through. When the normally closed solenoid valve 1 is energized and opened, water can pass through. Therefore, the pre-treatment water inlet switch closed means that the low-pressure switch is closed and the normally closed solenoid valve is energized, and the pre-treatment water inlet switch disconnected means that the low-pressure switch is closed and the normally closed solenoid valve is de-energized.

[0056] Again, for the case where the water storage container includes a first water storage container 21 and a second water storage container 20, and the outlet of the second check valve 15 is connected to the first water storage container 21 through a two-way solenoid valve 10, the outlet of the second check valve 15 is connected to the inlet of the second water storage container 20 through a second branch, the second branch is provided with a high-pressure switch 18 and a normally open solenoid valve 19, and the inlet of the second water storage container 20 is connected to the first water storage container 21 through a normally closed solenoid valve 22, the emptying process includes a first emptying process and a second emptying process, specifically: When executing the first emptying process, the pretreatment water inlet switch 01 is disconnected so that water cannot enter the water inlet end, the normally closed solenoid valve three 16, the normally open solenoid valve 19, the normally closed solenoid valve four 22 and the two-way solenoid valve 10 are de-energized, the normally open solenoid valve 19 is de-energized to allow water to flow through, the normally closed solenoid valve two 8 and the wastewater ratio solenoid valve 12 are energized and opened, the normally closed solenoid valve two 8 and the wastewater ratio solenoid valve 12 are energized and opened to allow water to flow through, and the booster pump 6 is started to pump water.

[0057] In the first emptying process, if Figure 14 As shown, the high-pressure water in the second water storage container is discharged through the floor drain via the high-pressure switch 18, the normally-open solenoid valve 19, the normally-closed solenoid valve 28, and the wastewater solenoid valve 12. The state of the high-pressure switch during this process is determined by the water pressure in the second water storage container. This process is used to drain the water in the second water storage container through the membrane structure. During this process, the normally-closed solenoid valve 22 and the two-way solenoid valve 10 are de-energized, preventing water from flowing through them, thereby preventing water from the second water storage container from entering the first water storage container.

[0058] When executing the second emptying process, the pretreatment water inlet switch 01 is disconnected so that water cannot enter the water inlet end. The states of the booster pump 6, the normally closed solenoid valve 2 8, the wastewater ratio solenoid valve 12, the normally closed solenoid valve 3 16, the normally open solenoid valve 19 and the normally closed solenoid valve 4 22 are the same as the corresponding states in the first emptying process, and the two-way solenoid valve 10 is energized and opened.

[0059] In the second emptying process, if Figure 15 As shown, the water in the first water storage container is discharged from the floor drain through the two-way solenoid valve 10, the normally closed solenoid valve 8 and the wastewater solenoid valve 12; this process is used to discharge the water in the first water storage container through the membrane structure, and is mainly used when the water quality in the first water storage container is unqualified.

[0060] When executing the water production process, the pretreatment water inlet switch 01 is closed, the normally closed solenoid valve 2 8, the normally closed solenoid valve 3 16, the normally open solenoid valve 19, the two-way solenoid valve 10 and the wastewater ratio solenoid valve 12 are de-energized, the normally closed solenoid valve 4 22 is energized and opened, the booster pump 6 is started, and the water flow at the water inlet passes through the membrane structure to produce pure water. The pure water enters the first water storage container 21 through its second water outlet, the high-pressure switch 18, the normally open solenoid valve 19 and the normally closed solenoid valve 4 22. After the liquid level in the first water storage container 21 reaches the set liquid level, the normally closed solenoid valve 4 22 is de-energized, and the pure water switches to enter the second water storage container 20. The wastewater generated in the water production process is discharged from the floor drain through the wastewater ratio solenoid valve 12; And: when executing the first flushing process and the second flushing process: the normally open solenoid valve 19 is energized and opened, and the normally closed solenoid valve four 22 and the two-way solenoid valve 10 remain de-energized; when executing the power-on process, the normally open solenoid valve 19 and the two-way solenoid valve 10 are de-energized, and the state of the normally closed solenoid valve four 22 is determined by the liquid level in the water storage container; when executing the full water process, the two-way solenoid valve 10, the normally open solenoid valve 19 and the normally closed solenoid valve four 22 are de-energized.

[0061] With respect to each process of the aforementioned water purifier, an embodiment of the present invention further discloses a working method of a time-type water purifier for a membrane structure used for the first time, the working method comprising: Step D1: performing a first flushing process within a first preset time; Step D2: After the first flushing process is completed, a second flushing process is executed, and the execution time of the second flushing process is a second preset time; Step D3: After the second flushing process is completed, the first emptying process is executed, and the execution time of the first emptying process is the third preset time; Step D4: After the first emptying process is completed, the water production process is executed until the second water storage container is full of water and the high-pressure switch 18 trips; Step D5: After the water production process is completed, the full water process is executed and the water purifier enters the full water standby state.

[0062] Among them, when an abnormal situation such as power outage or water outage (low-pressure switch disconnected) occurs during the membrane washing process, the method will be interrupted. When power or water is restored (low-pressure switch closed), the membrane washing program will continue to execute the previous steps or re-execute from step D1 to ensure the effectiveness of membrane flushing.

[0063] For a membrane structure being used for the first time, the operating method of the time-based water purifier according to an embodiment of the present invention includes a first flushing process, a second flushing process, a first emptying process, a water production process, and a full water process. The first flushing process is used to flush the membrane structure, the second flushing process is used to further flush the membrane structure by reducing the flow rate of wastewater flowing out of the first water outlet, and the first emptying process is used to empty the water in the second water storage container and use the water in the second water storage container to further flush the membrane structure. For a membrane structure being used for the first time, the status of each solenoid valve is shown in Table 1. The status of the normally closed solenoid valve in the fourth water production process in Table 1 is: after power is applied, it is controlled by the liquid level in the first water storage container.

[0064] Table 1: Status table of each solenoid valve for the membrane structure used for the first time

[0065] For situations where the interval between two water production processes is greater than the set time, that is, during holidays, or when the water quality does not meet the requirements, such as when the water quality is found to be contaminated after testing, the working methods of the time-type water purifier include: Step E1: performing a first emptying process within a fourth preset time; and / or performing a second emptying process within a fifth preset time; Step E2: Execute the water production process until the second water storage container is full of water and the high-pressure switch 18 trips; Step E3: After the water production process is completed, the full water process is executed and the water purifier enters the full water standby state.

[0066] In this embodiment, during holiday mode or when water quality does not meet standards, the water purifier operates in a first draining process and / or a second draining process, a water production process, and a full water process. The first draining process is used to drain the water from the second water storage container, the second draining process is used to drain the water from the first water storage container, and the water production process is used to produce water for both the empty second water storage container and the first water storage container. In holiday mode or when water quality does not meet standards, the status of each solenoid valve is shown in Table 2. In Table 2, the status of the normally closed solenoid valve in the water production process is: after power is applied, it is controlled by the liquid level control of the first water storage container. After power is applied, it is controlled by the liquid level control of the first water storage container.

[0067] Table 2: Status table of each solenoid valve for holiday mode or substandard water quality

[0068] For a time-type water purifier in use, the aforementioned working method includes: Step F1: After the device is powered on again, execute the power-on process; Step F2: After the power-on process is completed, the water production process is continued until the second water storage container is full of water and the high-pressure switch 18 trips; Step F3: After the water production process is completed, the full water process is executed and the water purifier enters the full water standby state.

[0069] For a time-type water purifier, the working method of the embodiment of the present invention further includes a third flushing process, specifically: When performing the third flushing process, if Figure 17 As shown, the pretreatment water inlet switch 01 is closed to allow the water flow at the water inlet end to pass through, the wastewater ratio solenoid valve 12 is energized and opened, the normally closed solenoid valve 2 8, the normally closed solenoid valve 3 16, the normally open solenoid valve 19 and the two-way solenoid valve 10 are de-energized, the booster pump 6 is started, and the state of the normally closed solenoid valve 4 22 is determined by the liquid level in the first water storage container.

[0070] The third flushing process is used for routine flushing of the membrane structure. Specifically, during this process, water from the water inlet enters the membrane structure through the pretreatment water inlet switch 01, the booster pump, and the first pretreatment filter element 9 to flush the membrane structure. The resulting wastewater flows through the wastewater ratio solenoid valve 12 and flows into the floor drain. During this process, the state of the normally closed solenoid valve 22 is determined by the liquid level in the first water storage container.

[0071] During the execution of the water production process, the third flushing process is executed, and the execution time of the third flushing process is the sixth preset time.

[0072] For time-type water purifiers, the working method of the embodiment of the present invention also includes a circulation process; specifically, when the water purifier enters the full water standby state, if no water is used within the set time and the water purifier does not enter the water production state, the circulation process is executed.

[0073] When executing the circulation process, the pretreatment water inlet switch 01 is closed to allow the water flow at the water inlet end to pass through, the wastewater ratio solenoid valve 12 is energized and opened, the normally closed solenoid valve 2 8, the normally closed solenoid valve 4 22, the normally closed solenoid valve 3 16, the normally open solenoid valve 19 and the two-way solenoid valve 10 are de-energized, and the booster pump 6 is started.

[0074] In a cyclic process, such as Figure 17 As shown, the water flow at the water inlet is discharged from the floor drain through the first water outlet of the membrane structure and the wastewater solenoid valve 12; After the circulation process is completed, the water purifier enters the full water standby state again.

[0075] The execution time of the loop process is the seventh preset time.

[0076] In specific implementation, for example, if there is no water use for 24 hours, that is, the water purifier does not enter the water production process for 24 hours, the circulation process is executed. The execution time of the circulation process is the seventh preset time. After the circulation process ends, the water purifier enters the full water standby state again.

[0077] The aforementioned processes all involve a time-type water purifier, and as can be seen from the aforementioned, an embodiment of the present invention also includes a flow-type water purifier, that is, a first flow meter 5 is provided on the second pipeline between the connection between the first branch and the second pipeline of the water purifier of the present invention and the booster pump 6, or a first flow meter 5 is provided on the second pipeline downstream of the booster pump 6, and the first flow meter is used to detect the flow rate of water flowing through the second pipeline.

[0078] For the flow-type water purifier provided with the first flow meter 5, the working method for the membrane structure used for the first time includes: Step A1: executing a first flushing process, wherein the execution time of the first flushing process is determined by the water flow through the first flow meter and the corresponding first preset volume; Step A2: After the first flushing process is completed, a second flushing process is executed, and the execution time of the second flushing process is determined by the water flow through the first flow meter and the corresponding second preset volume; Step A3: After the second flushing process is completed, the first emptying process is executed. The execution time of the first emptying process is determined by the water flow through the first flow meter and the corresponding third preset volume; Step A4: After the first emptying process is completed, the water production process is executed until the second water storage container is full of water and the high-pressure switch 18 trips; Step A5: After the water production process is completed, the full water process is executed and the water purifier enters the full water standby state.

[0079] For a membrane structure being used for the first time, the flow-type water purifier according to an embodiment of the present invention operates in a method comprising a first flushing process, a second flushing process, a first emptying process, a water preparation process, and a full water process. The first flushing process is used to flush the membrane structure, the second flushing process is used to further flush the membrane structure by reducing the flow rate of wastewater flowing out of the first water outlet, and the first emptying process is used to empty the water in the second water storage container and use the water in the second water storage container to further flush the membrane structure.

[0080] In case the interval between two water production processes is greater than the set time, or the water quality does not meet the requirements, the working method of the flow-type water purifier of the embodiment of the present invention includes: Step B1: executing a first emptying process, wherein the execution time of the first emptying process is determined by the water flow through the first flow meter and the corresponding fourth preset volume; and / or executing a second emptying process, wherein the execution time of the second emptying process is determined by the water flow through the first flow meter and the corresponding fifth preset volume; Step B2: Execute the water production process until the second water storage container is full of water and the high pressure switch 18 trips; Step B3: After the water production process is completed, the full water process is executed and the water purifier enters the full water standby state.

[0081] For this embodiment, in holiday mode or when the water quality does not meet the standard, the working mode of the water purifier includes a first emptying process and / or a second emptying process, a water making process and a full water process, wherein the first emptying process is used to empty the water in the second water storage container, the second emptying process is used to empty the water in the first water storage container, and the water making process is used to make water for the empty second water storage container and the first water storage container, and after the water is made, the full water process is entered.

[0082] For a water purifier in use, the working method of the flow-type water purifier according to an embodiment of the present invention includes: Step C1: After the device is powered on again, execute the power-on process; Step C2: After the power-on process is completed, the water production process is executed until the second water storage container is full of water and the high-pressure switch 18 trips; Step C3: After the water production process is completed, the full water process is executed and the water purifier enters the full water standby state.

[0083] For the flow-type water purifier, the working method of the embodiment of the present invention further includes a third flushing process, specifically, During the third flushing process, the pre-treatment water inlet switch 01 is closed to allow water from the water inlet to flow through, the wastewater ratio solenoid valve 12 is energized and opened, the normally closed solenoid valve 2 8, the normally closed solenoid valve 3 16, the normally open solenoid valve 19, and the two-way solenoid valve 10 are de-energized, the booster pump is started, and the state of the normally closed solenoid valve 4 22 is determined by the liquid level in the first water storage container; During the water production process, a third flushing process is executed. The execution time of the third flushing process is determined by the water flow through the first flow meter and the corresponding sixth preset volume.

[0084] For flow-type water purifiers, the working method of the embodiment of the present invention also includes a circulation process; specifically, when the water purifier enters the full water standby state, if no water is used within the set time and the water purifier does not enter the water production state, the circulation process is executed.

[0085] When executing the circulation process, the pretreatment water inlet switch 01 is closed to allow the water flow at the water inlet end to pass through, the wastewater ratio solenoid valve 12 is energized and opened, the normally closed solenoid valve 2 8, the normally closed solenoid valve 4 22, the normally closed solenoid valve 3 16, the normally open solenoid valve 19 and the two-way solenoid valve 10 are de-energized, and the booster pump 6 is started.

[0086] In the circulation process, the water flow at the water inlet passes through the first water outlet of the membrane structure and the wastewater solenoid valve 12 and is discharged from the floor drain.

[0087] After the circulation process is completed, the water purifier enters the full water standby state again.

[0088] The execution time of the circulation process is determined by the water flow through the first flow meter and the corresponding seventh preset volume.

[0089] In specific implementation, for example, if no water is used for 24 hours, that is, the water purifier does not enter the water production process for 24 hours, the circulation process is executed. The execution time of the circulation process is determined by the water flow through the first flow meter and the corresponding seventh preset volume. After the circulation process ends, the water purifier enters the full water standby state again.

[0090] The working method of the embodiment of the present invention can realize intelligent flushing of reverse osmosis or nanofiltration membrane; the embodiment of the present invention can complete emptying more intelligently, including the emptying of the second water storage container and the emptying of the first water storage container; therefore, the working method of the embodiment of the present invention effectively saves labor costs and avoids ineffective expenditure.

[0091] The working method of the embodiment of the present invention realizes the emptying function during holidays or after water pollution, effectively solving the problem of stale water caused by various short holidays, while ensuring the water quality of customers.

[0092] It should be noted that, unless otherwise specified, the technical or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0093] In addition, the terms "one", "two", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the present invention, the meaning of "multiple" is more than two, unless otherwise clearly and specifically limited.

[0094] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A water purifier, characterized in that: The invention comprises a first pipeline, one end of the first pipeline is a water inlet end, the other end of the first pipeline is connected to the water inlet of the membrane structure through a second pipeline, the first pipeline is provided with a pretreatment water inlet switch (01), the second pipeline is provided with a booster pump (6) and at least one first pretreatment filter element (9), the first water outlet of the membrane structure is connected to the floor drain through a wastewater ratio solenoid valve (12), the flow rate of the wastewater flowing into the floor drain through the wastewater ratio solenoid valve when the wastewater ratio solenoid valve is in an open state is greater than the flow rate when the wastewater ratio solenoid valve is in a closed state; the second water outlet of the membrane structure is connected to the floor drain through a wastewater ratio solenoid valve (12). Three pipelines are connected to the floor drain, the third pipeline is provided with a normally closed electromagnetic valve three (16) and a check valve one (17), the second water outlet of the membrane structure is connected to the inlet of the check valve two (15), the outlet of the check valve two (15) is connected to one end of the first branch, the first branch is provided with a check valve three (7) and a normally closed electromagnetic valve two (8), the other end of the first branch is connected to the second pipeline upstream of the booster pump (6), the outlet of the check valve two (15) is connected to the water storage container, the inlets of the check valve one (17) and the check valve three (7) are both provided near the second water outlet of the membrane structure, The water storage container comprises a first water storage container (21), the outlet of the second check valve (15) being connected to the first water storage container (21) via a two-way solenoid valve (10); the water storage container further comprises a second water storage container (20), the outlet of the second check valve (15) being connected to the inlet of the second water storage container (20) via a second branch, and the second branch is provided with a high-pressure switch (18) and a normally open solenoid valve (19); The inlet of the second water storage container (20) and the first water storage container (21) are connected via a normally closed electromagnetic valve four (22).

2. The water purifier according to claim 1, characterized in that The pretreatment water inlet switch (01) includes a normally closed electromagnetic valve 1; a second pretreatment filter element (3) is also provided on the first pipeline, and the second pretreatment filter element (3) is provided upstream of the normally closed electromagnetic valve 1; one end of the first pipeline is connected to the first end of the water inlet three-way valve, the second end of the water inlet three-way valve is connected to the tap water inlet end, and the third end of the water inlet three-way valve is connected to the tap water outlet faucet; the membrane structure is a reverse osmosis membrane or a nanofiltration membrane.

3. The water purifier according to any one of claims 1-2, characterized in that: A first flow meter (5) is provided on the second pipeline between the connection point between the first branch and the second pipeline and the booster pump (6), or a first flow meter (5) is provided on the second pipeline downstream of the booster pump (6).

4. A working method of a water purifier, characterized in that: The water purifier according to claim 1 or claim 2 is used, and the working method includes a first flushing process, a second flushing process, an emptying process, a water production process, a power-on process, and a full water process. Specifically: When executing the first flushing process: the pre-treatment water inlet switch (01) is closed, the wastewater ratio solenoid valve (12) and the normally closed solenoid valve three (16) are energized and opened, the normally closed solenoid valve two (8) remains de-energized, the booster pump (6) is started, and the water flow at the water inlet is discharged from the first water outlet and the second water outlet of the membrane structure to the floor drain; When executing the second flushing process: the pretreatment water inlet switch (01) is closed, the normally closed solenoid valve three (16) is energized and opened, the wastewater ratio solenoid valve (12) and the normally closed solenoid valve two (8) are de-energized, the booster pump (6) is started, and the water flow at the water inlet is discharged from the first water outlet and the second water outlet of the membrane structure to the floor drain; When the emptying process is executed, the pre-treatment water inlet switch (01) is disconnected, the normally closed solenoid valve 3 (16) is powered off, the normally closed solenoid valve 2 (8) and the wastewater ratio solenoid valve (12) are powered on and opened, the booster pump (6) is started, and the water in the water storage container is discharged from the floor drain through the normally closed solenoid valve 2 (8) and the wastewater ratio solenoid valve (12); When executing the water production process, the pre-treatment water inlet switch (01) is closed, the normally closed solenoid valve 2 (8), the normally closed solenoid valve 3 (16) and the wastewater ratio solenoid valve (12) are de-energized, the normally closed solenoid valve 4 (22) is energized and opened, the booster pump (6) is started, and the water flow at the water inlet passes through the membrane structure to produce pure water, and the pure water enters the water storage container through its second water outlet, and the wastewater generated in the water production process is discharged from the floor drain through the wastewater ratio solenoid valve (12); When the power-on process is executed, the pre-treatment water inlet switch (01) is closed, the wastewater ratio solenoid valve (12) is powered on and opened, the normally closed solenoid valve 2 (8) and the normally closed solenoid valve 3 (16) are powered off, and the booster pump (6) is started; When executing the full water process, the pretreatment water inlet switch (01) is closed, the booster pump (6) is started, the wastewater ratio solenoid valve (12) is energized and opened, the normally closed solenoid valve three (16) and the normally closed solenoid valve two (8) are de-energized, and the water purifier enters the full water standby state.

5. The working method according to claim 4, characterized in that: The emptying process includes a first emptying process and a second emptying process, specifically: When executing the first emptying process, the pretreatment water inlet switch (01) is disconnected, the normally closed solenoid valve three (16), the normally open solenoid valve (19), the normally closed solenoid valve four (22) and the two-way solenoid valve (10) are powered off, the normally closed solenoid valve two (8) and the wastewater ratio solenoid valve (12) are powered on and opened, the booster pump (6) is started, and the high-pressure water in the second water storage container is discharged from the floor drain through the high-pressure switch (18), the normally open solenoid valve (19), the normally closed solenoid valve two (8) and the wastewater ratio solenoid valve (12); When executing the second emptying process, the pre-treatment water inlet switch (01) is disconnected, the states of the booster pump (6), the normally closed solenoid valve 2 (8), the wastewater ratio solenoid valve (12), the normally closed solenoid valve 3 (16), the normally open solenoid valve (19) and the normally closed solenoid valve 4 (22) are the same as those corresponding to the first emptying process, the two-way solenoid valve (10) is energized and opened, and the water in the first water storage container is discharged from the floor drain through the two-way solenoid valve (10), the normally closed solenoid valve 2 (8) and the wastewater ratio solenoid valve (12); When executing the water production process, the pretreatment water inlet switch (01) is closed, the normally closed solenoid valve 2 (8), the normally closed solenoid valve 3 (16), the normally open solenoid valve (19), the two-way solenoid valve (10) and the wastewater ratio solenoid valve (12) are powered off, the normally closed solenoid valve 4 (22) is powered on and opened, the booster pump (6) is started, and the water flow at the water inlet passes through the membrane structure to produce pure water. The pure water enters the first water storage container (21) through its second water outlet, the high-pressure switch (18), the normally open solenoid valve (19) and the normally closed solenoid valve 4 (22). After the liquid level in the first water storage container (21) reaches the set liquid level, the normally closed solenoid valve 4 (22) is powered off, and the pure water switches to enter the second water storage container (20). The wastewater generated by the water production process is discharged from the floor drain through the wastewater ratio solenoid valve (12); Furthermore, when the first flushing process and the second flushing process are executed, the normally open solenoid valve (19) is powered on and opened, and the normally closed solenoid valve four (22) and the two-way solenoid valve (10) remain powered off; when the power-on process is executed, the normally open solenoid valve (19) and the two-way solenoid valve (10) are powered off, and the state of the normally closed solenoid valve four (22) is determined by the liquid level in the first water storage container; when the full water process is executed, the two-way solenoid valve (10), the normally open solenoid valve (19) and the normally closed solenoid valve four (22) are powered off.

6. The working method according to claim 5, characterized in that: For the membrane structure used for the first time, the working method includes: Executing the first flushing process within a first preset time; After the first flushing process is completed, the second flushing process is executed, and the execution time of the second flushing process is a second preset time; After the second flushing process is completed, the first emptying process is executed, and the execution time of the first emptying process is a third preset time; After the first emptying process is completed, the water production process is executed until the second water storage container (20) is full of water and the high-pressure switch (18) trips; After the water production process is completed, the full water process is executed and the water purifier enters a full water standby state.

7. The working method according to claim 5, characterized in that: In case the interval between two water production processes is greater than the set time, or the water quality does not meet the requirements, the working method includes: executing the first emptying process within a fourth preset time; and / or executing the second emptying process within a fifth preset time; Executing the water production process until the second water storage container is full of water and the high-pressure switch (18) trips; After the water production process is completed, the full water process is executed and the water purifier enters a full water standby state.

8. The working method according to claim 5, characterized in that: For a water purifier in use, the working method includes: After the device is powered on again, the power-on process is executed; After the power-on process is completed, the water production process is continued until the second water storage container (20) is full of water; After the water production process is completed, the full water process is executed and the water purifier enters a full water standby state.

9. The working method according to any one of claims 6 to 8, characterized in that: The method further includes a third flushing process, specifically, When executing the third flushing process, the pretreatment water inlet switch (01) is closed, the wastewater ratio solenoid valve (12) is energized and opened, the normally closed solenoid valve 2 (8), the normally closed solenoid valve 3 (16), the normally open solenoid valve (19) and the two-way solenoid valve (10) are de-energized, the booster pump is started, and the state of the normally closed solenoid valve 4 (22) is determined by the liquid level in the first water storage container; During the execution of the water production process, the third flushing process is executed, and the execution time of the third flushing process is a sixth preset time.

10. The working method according to any one of claims 6 to 8, characterized in that: The working method further includes a circulation process, wherein the circulation process is executed if no water is used within a set time while the water purifier enters a full water standby state; When executing the circulation process, the pretreatment water inlet switch (01) is closed, the wastewater ratio solenoid valve (12) is powered on and opened, the normally closed solenoid valve 2 (8), the normally closed solenoid valve 4 (22), the normally closed solenoid valve 3 (16), the normally open solenoid valve (19) and the two-way solenoid valve (10) are powered off, the booster pump (6) is started, and the water flow at the water inlet end is discharged from the floor drain through the first water outlet of the membrane structure; After the cycle process is completed, the water purifier enters the full water standby state again; The execution time of the loop process is the seventh preset time.

11. The working method according to claim 5, characterized in that: A first flow meter (5) is provided on the second pipeline between the connection point between the first branch and the second pipeline and the booster pump (6), or a first flow meter (5) is provided on the second pipeline downstream of the booster pump (6), and the first flow meter is used to detect the flow rate of water flowing through the second pipeline.

12. The working method according to claim 11, characterized in that: For the membrane structure used for the first time, the working method includes: executing the first flushing process, wherein the execution time of the first flushing process is determined by the water flow through the first flow meter and the corresponding first preset volume; After the first flushing process is completed, the second flushing process is executed, and the execution time of the second flushing process is determined by the water flow through the first flow meter and the corresponding second preset volume; After the second flushing process is completed, the first emptying process is executed, and the execution time of the first emptying process is determined by the water flow through the first flow meter and the corresponding third preset volume; After the first emptying process is completed, the water production process is executed until the second water storage container is full of water and the high-pressure switch (18) trips; After the water production process is completed, the full water process is executed and the water purifier enters a full water standby state.

13. The working method according to claim 11, characterized in that: In case the interval between two water production processes is greater than the set time, or the water quality does not meet the requirements, the working method includes: executing the first emptying process, wherein the execution time of the first emptying process is determined by the water flow through the first flow meter and the corresponding fourth preset volume; and / or executing the second emptying process, wherein the execution time of the second emptying process is determined by the water flow through the first flow meter and the corresponding fifth preset volume; Executing the water production process until the second water storage container is full of water and the high-pressure switch (18) trips; After the water production process is completed, the full water process is executed and the water purifier enters a full water standby state.

14. The working method according to claim 11, characterized in that: For a water purifier in use, the working method includes: After the device is powered on again, the power-on process is executed; After the power-on process is completed, the water production process is executed until the second water storage container is full of water and the high-pressure switch (18) trips; After the water production process is completed, the full water process is executed and the water purifier enters a full water standby state.

15. The working method according to any one of claims 12 to 14, characterized in that: The method further includes a third flushing process, specifically, When executing the third flushing process, the pretreatment water inlet switch (01) is closed, the wastewater ratio solenoid valve (12) is energized and opened, the normally closed solenoid valve 2 (8), the normally closed solenoid valve 3 (16), the normally open solenoid valve (19) and the two-way solenoid valve (10) are de-energized, the booster pump is started, and the state of the normally closed solenoid valve 4 (22) is determined by the liquid level in the first water storage container; During the execution of the water production process, the third flushing process is executed, and the execution time of the third flushing process is determined by the water flow through the first flow meter and the corresponding sixth preset volume.

16. The working method according to any one of claims 12 to 14, characterized in that: The working method further includes a circulation process, wherein the circulation process is executed if no water is used within a set time while the water purifier enters a full water standby state; When executing the circulation process, the pretreatment water inlet switch (01) is closed, the wastewater ratio solenoid valve (12) is opened, the normally closed solenoid valve 2 (8), the normally closed solenoid valve 4 (22), the normally closed solenoid valve 3 (16), the normally open solenoid valve (19) and the two-way solenoid valve (10) are closed, the booster pump (6) is started, and the water flow at the water inlet end is discharged from the floor drain through the first water outlet of the membrane structure; After the cycle process is completed, the water purifier enters the full water standby state again; The execution time of the cycle process is determined by the water flow through the first flow meter and the corresponding seventh preset volume.

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