Control method of water purifier and water purifier

Abstract

The invention relates to the technical field of water purification equipment, and particularly provides a control method of a water purifier and the water purifier. Specifically, the water purifier comprises a water inlet pipeline, a raw water pump, a filtering assembly, a pure water tank, a first pipeline, a flushing pipeline, a control valve and a water outlet assembly, the raw water pump is arranged on the water inlet pipeline, the water inlet pipeline, the filtering assembly, the first pipeline, the pure water tank and the water outlet assembly are sequentially communicated, and the pure water tank is communicated with the water inlet pipeline through the flushing pipeline; the water inlet pipeline is communicated with the water source when the control valve is in the first working mode, the water inlet pipeline is communicated with the flushing pipeline when the control valve is in the second working mode, and the control method comprises the steps that after the water purifier stops producing water, the control valve is switched to the second working mode; and the raw water pump is operated to introduce pure water into the water inlet pipeline and a filter element of the filter assembly. After water production is finished, pure water is introduced into the water inlet pipeline and the filter element of the filter assembly to replace raw water, so that the TDS value in water can be reduced, and the water quality is improved.

Description

Technical Field

[0001] This invention relates to the field of water purification equipment technology, specifically providing a control method for a water purifier and a water purifier. Background Technology

[0002] As people's living standards improve and industrialization accelerates, water pollution is becoming increasingly harmful to human health. As a result, water purification equipment is becoming more and more popular.

[0003] Water purifiers are a common household water purification device. They contain a filter that filters raw water to produce pure water for the user. However, if a water purifier is not used for a period of time, its TDS (Total Dissolved Solids) value may be high when it is used again, affecting the quality of the water used by the user.

[0004] Therefore, a new technical solution is needed in this field to solve the above problems. Summary of the Invention

[0005] The present invention aims to solve the above-mentioned technical problem, namely, to solve the problem that the TDS value of existing water purifiers is often too high when they are used again after being stopped for a period of time.

[0006] In a first aspect, the present invention provides a control method for a water purifier, the water purifier comprising an inlet pipe, a raw water pump, a filter assembly, a pure water tank, a first pipe, a flushing pipe, a control valve, and an outlet assembly. The raw water pump is disposed on the inlet pipe, the inlet end and the outlet end of the inlet pipe being connected to a water source and the filter assembly, respectively. The filter assembly is connected to the inlet of the pure water tank via the first pipe, the outlet of the pure water tank being connected to the outlet assembly. The inlet end of the flushing pipe is connected to the pure water tank, and the outlet end of the flushing pipe is connected to the inlet pipe. The point is located upstream of the raw water pump. The control valve is installed on the inlet pipe and the flushing pipe. The control valve has a first working mode and a second working mode. When the control valve is in the first working mode, the inlet pipe is connected to the water source. When the control valve is in the second working mode, the inlet pipe is connected to the flushing pipe. The control method includes: when the water purifier stops producing water, switching the control valve to the second working mode; and running the raw water pump to introduce pure water from the pure water tank into the inlet pipe and the filter element of the filter assembly.

[0007] In a preferred embodiment of the above-mentioned control method for a water purifier, the control method further includes: obtaining the duration for which the pure water in the pure water tank has not been used; and selectively re-filtering the pure water in the pure water tank based on the duration.

[0008] In the preferred embodiment of the above-mentioned water purifier control method, the step of "selectively re-filtering the pure water in the pure water tank according to the duration" specifically includes: comparing the duration with a first preset time; if the duration is greater than or equal to the first preset time, then re-filtering the pure water in the pure water tank.

[0009] In the preferred embodiment of the control method for the above-mentioned water purifier, the water outlet component includes a water outlet pipe, a water outlet member, and a water pump and a first heating member disposed on the water outlet pipe. The inlet and outlet ends of the water outlet pipe are respectively connected to the pure water tank and the water outlet member. The water purifier has a first sterilization mode. When the first sterilization mode is executed, the first heating member is activated to heat the water in the water outlet pipe to sterilize the water outlet pipe.

[0010] In the preferred embodiment of the control method for the water purifier described above, the water purifier further includes a first sterilization pipeline, the two ends of which are respectively connected to the outlet pipeline and the pure water tank. The connection point between the outlet pipeline and the first sterilization pipeline is located downstream of the outlet pump and the first heating component and upstream of the outlet component. The water purifier also has a second sterilization mode. When the second sterilization mode is executed, the outlet pump and the first heating component are activated to circulate hot water between the outlet pipeline, the first sterilization pipeline, and the pure water tank.

[0011] In the preferred embodiment of the above-mentioned control method for a water purifier, the control method includes: first executing the first sterilization mode, and after the running time of the first sterilization mode reaches a second preset time, then executing the second sterilization mode.

[0012] In the preferred embodiment of the above-mentioned control method for a water purifier, the water purifier further includes a raw water tank and a second sterilization pipeline. The raw water tank is a water source. The two ends of the second sterilization pipeline are respectively connected to the outlet pipeline and the raw water tank. The connection point between the outlet pipeline and the second sterilization pipeline is located downstream of the outlet pump and the first heating element and upstream of the outlet element. The water purifier also has a third sterilization mode. When the third sterilization mode is executed, the outlet pump and the first heating element are activated to allow hot water to enter the raw water tank.

[0013] In the preferred embodiment of the above-mentioned control method for a water purifier, the pure water tank includes an external pure water tank and an internal pure water tank connected in parallel. Both the external pure water tank and the internal pure water tank are connected to the first pipeline and to the water outlet component. The flushing pipeline is connected to the external pure water tank. Furthermore, / or the control valve is a three-way solenoid valve. The first port of the three-way solenoid valve is connected to the flushing pipeline, the second port is connected to the water source, and the third port is connected to the water inlet pipeline. When the control valve is in the first working mode, the second port is connected to the third port; when the control valve is in the second working mode, the first port is connected to the third port.

[0014] In the preferred embodiment of the control method for the above-mentioned water purifier, a second heating component is provided in the built-in pure water tank.

[0015] In a second aspect, the present invention also provides a water purifier, including a controller configured to perform the control method described above.

[0016] When the above technical solution is adopted, the water purifier of the present invention connects the pure water tank and the inlet water pipe by setting up a flushing pipe. After the water production is completed, the pure water in the pure water tank is extracted by the raw water pump and introduced into the filter element of the filter assembly and the inlet water pipe. That is, the raw water in the inlet water pipe and the filter element is replaced by pure water, which can reduce the TDS value in the water and improve the cleanliness of the inlet water pipe, thereby improving the water quality.

[0017] Furthermore, the water purifier of the present invention can also monitor the usage of pure water in the pure water tank. When the pure water in the pure water tank has not been used for a long period of time, it can be filtered again to ensure the freshness of the pure water in the pure water tank and further improve the user's water quality.

[0018] Furthermore, the water purifier of the present invention also has a first sterilization mode, which can sterilize the water outlet pipe with high-temperature hot water to prevent bacteria from growing in the water outlet pipe, thereby better ensuring the water quality for users.

[0019] Furthermore, the water purifier of the present invention also has a second sterilization mode, which can sterilize the pure water tank with high-temperature hot water to prevent bacteria from growing in the pure water tank, thereby better ensuring the water quality for users.

[0020] Furthermore, the water purifier of the present invention also has a third sterilization mode, which can sterilize the raw water tank with high-temperature hot water to prevent bacteria from growing in the raw water tank, thereby better ensuring the water quality for users. Attached Figure Description

[0021] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0022] Figure 1 This is a system schematic of the water purifier of the present invention. Figure 1 ;

[0023] Figure 2 This is a system schematic of the water purifier of the present invention. Figure 2 ;

[0024] Figure 3 This is a system schematic of the water purifier of the present invention. Figure 3 ;

[0025] Figure 4 This is a system schematic of the water purifier of the present invention. Figure 4 ;

[0026] Figure 5 This is a system schematic of the water purifier of the present invention. Figure 5 ;

[0027] Figure 6 This is a flowchart of the control method for the water purifier of the present invention.

[0028] List of reference numerals in the attached diagram:

[0029] 10. Inlet water pipe; 11. Raw water pump; 12. First pipe; 20. Filter assembly; 21. Flushing solenoid valve; 3. Pure water tank; 31. External pure water tank; 32. Internal pure water tank; 40. Control valve; 5. Outlet water assembly; 51. Outlet water pipe; 52. Outlet water pump; 53. First heating component; 54. Outlet water component; 55. Outlet water solenoid valve; 60. Flushing pipe; 70. Raw water tank; 80. First sterilization pipe; 90. Second sterilization pipe; 91. Sterilization solenoid valve. Detailed Implementation

[0030] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0031] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that although the steps of the control method of the present invention are described in a specific order in this application, this order is not restrictive, and those skilled in the art can perform the steps in different orders without departing from the basic principles of the present invention.

[0032] It should be noted that in the description of this invention, terms such as "upper," "lower," "top," "bottom," "left," and "right," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "set," "connect," and "install" should be interpreted broadly, for example, referring to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] Specifically, the present invention provides a water purifier, such as... Figure 1 As shown, the water purifier of the present invention includes an inlet pipe 10, a raw water pump 11, a filter assembly 20, a pure water tank 3, a first pipe 12, and an outlet water assembly 5.

[0035] The raw water pump 11 is installed on the water inlet pipe 10. The water inlet end and the water outlet end of the water inlet pipe 10 are connected to the water source and the filter assembly 20, respectively. The filter assembly 20 is connected to the water inlet of the pure water tank 3 through the first pipe 12. The water outlet of the pure water tank 3 is connected to the water outlet assembly 5.

[0036] Pure water tank 3 stores pure water. When the user needs to take pure water, the water outlet component 5 is opened, and the pure water in the pure water tank 3 is discharged. When the pure water in the pure water tank 3 is insufficient, the water purifier starts to produce water and starts the raw water pump 11. The raw water enters the filter component 20 along the water inlet pipe 10 for filtration. The filtered pure water enters the pure water tank 3 along the first pipe 12 for storage.

[0037] It should be noted that, in practical applications, those skilled in the art can directly connect the inlet end of the water inlet pipe 10 to the faucet in the user's home, or they can set up a raw water tank in the water purifier, use the raw water tank as the water source, and connect the inlet end of the water inlet pipe 10 to the raw water tank, etc. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention, and should all be limited to the protection scope of the present invention.

[0038] Preferably, such as Figure 1 As shown, the water purifier of the present invention also includes a raw water tank 70, which serves as a water source. The raw water tank 70 stores raw water. When the water purifier needs to produce water, the raw water pump 11 is activated, which draws the raw water from the raw water tank 70 and delivers it to the filter assembly 20.

[0039] It should be noted that the present invention does not limit the specific type of the filter component 20. For example, the filter component 20 can be set as a PCR composite filter cartridge, which is composed of PP cotton, activated carbon and a post-RO membrane, that is, it contains three different filter materials in the same filter cartridge. Alternatively, the filter component 20 can be set as a reverse osmosis filter cartridge, etc. Such adjustments and changes to the specific type of the filter component 20 do not deviate from the principle and scope of the present invention and should be limited to the protection scope of the present invention.

[0040] Preferably, such as Figure 1 As shown, the water outlet component 5 of the water purifier of the present invention includes a water outlet pipe 51, a water outlet component 54, and a water outlet pump 52 and a first heating component 53 disposed on the water outlet pipe 51. The water inlet end and the water outlet end of the water outlet pipe 51 are respectively connected to the pure water tank 3 and the water outlet component 54.

[0041] For example, a water outlet solenoid valve 55 is also provided on the water outlet pipe 51. The water outlet solenoid valve 55 is located near the water outlet component 54. When the user needs pure water, the water outlet solenoid valve 55 is turned on, and the water outlet pump 52 is started. The pure water in the pure water tank 3 is drawn out by the water outlet pump 52. The pure water flows along the water outlet pipe 51 to the water outlet component 54 and is discharged from the water outlet component 54. If the user needs hot water, the first heating component 53 is started at the same time to heat the pure water.

[0042] Preferably, such as Figure 1 As shown, the water purifier of the present invention also includes a flushing pipe 60 and a control valve 40. The inlet end of the flushing pipe 60 is connected to the pure water tank 3, and the outlet end of the flushing pipe 60 is connected to the inlet pipe 10. The connection point is located upstream of the raw water pump 11. The control valve 40 is installed on the inlet pipe 10 and the flushing pipe 60. The control valve 40 has a first working mode and a second working mode. When the control valve 40 is in the first working mode, the inlet pipe 10 is connected to the water source. When the control valve 40 is in the second working mode, the inlet pipe 10 is connected to the flushing pipe 60.

[0043] Based on any of the water purifiers described above, this invention also provides a control method for the water purifier, such as... Figure 6 As shown, the control method of the present invention includes the following steps: when the water purifier stops producing water, the control valve 40 is switched to the second working mode; the raw water pump 11 is run to introduce pure water from the pure water tank 3 into the inlet pipe 10 and the filter element of the filter assembly 20.

[0044] In other words, when the water purifier is producing water, the control valve 40 is in the first working mode, the inlet pipe 10 is connected to the raw water tank 70, the raw water pump 11 draws the raw water out of the raw water tank 70, and the raw water is filtered by the filter assembly 20 and then enters the pure water tank 3 for storage. When the water purifier finishes producing water, the control valve 40 switches to the second working mode, the inlet pipe 10 is connected to the flushing pipe 60, the raw water pump 11 continues to run, the raw water pump 11 draws the pure water out of the pure water tank 3, and the pure water enters the inlet pipe 10 and the filter assembly 20 along the flushing pipe 60. The pure water flushes the filter element in the inlet pipe 10 and the filter assembly 20, replacing the raw water in the pipe, which can improve the cleanliness of the pipe and reduce the TDS value in the water, thus improving the water quality.

[0045] It should be noted that the filter assembly 20 is connected to a drain pipe, and a flushing solenoid valve 21 is installed on the drain pipe. When it is necessary to flush the water inlet pipe 10 and the filter assembly 20, the flushing solenoid valve 21 will also be opened to discharge the raw water.

[0046] Furthermore, it should be noted that the present invention does not limit the specific structural form of the control valve 40. For example, the control valve 40 can be set as a three-way solenoid valve, or the control valve 40 can be set as including two solenoid valves, which are respectively set in the flushing pipeline 60 and the pipeline connected to the raw water tank 70, etc. Such adjustments and changes to the specific structural form of the control valve 40 do not deviate from the principle and scope of the present invention, and should all be limited to the protection scope of the present invention.

[0047] Preferably, such as Figure 1 and Figure 2 As shown, the control valve 40 is a three-way solenoid valve. The first port of the three-way solenoid valve is connected to the flushing pipeline 60, the second port of the three-way solenoid valve is connected to the water source (preferably the raw water tank 70), and the third port of the three-way solenoid valve is connected to the water inlet pipeline 10. When the control valve 40 is in the first working mode, the second port and the third port are connected. When the control valve 40 is in the second working mode, the first port and the third port are connected.

[0048] When the water purifier needs to produce water, the second and third ports of the three-way solenoid valve are connected to connect the inlet pipe 10 to the raw water tank 70. When the water production is finished and the inlet pipe 10 and the filter assembly 20 need to be flushed, the first and third ports of the three-way solenoid valve are connected to connect the inlet pipe 10 to the flushing pipe 60.

[0049] Preferably, such as Figure 1 and Figure 2As shown, the pure water tank 3 of the present invention includes an external pure water tank 31 and an internal pure water tank 32 arranged in parallel. Both the external pure water tank 31 and the internal pure water tank 32 are connected to the first pipeline 12 and to the water outlet assembly 5. The flushing pipeline 60 is connected to the external pure water tank 31.

[0050] The external pure water tank 31 can be removed from the water purifier, and the flushing pipe 60 is connected to the external pure water tank 31, such as... Figure 2 As shown, when the water purifier stops producing water, the first and third ports of the three-way solenoid valve are connected, the raw water pump 11 is started, and the pure water in the external pure water tank 31 is used to flush the filter element of the inlet pipe 10 and the filter assembly 20.

[0051] Preferably, the built-in pure water tank 32 of the present invention is provided with a second heating component (not shown in the figure).

[0052] By installing a second heating element in the built-in pure water tank 32, the pure water in the built-in pure water tank 32 is heated to maintain a certain temperature. When the user needs hot water, the pure water in the built-in pure water tank 32 is discharged, which can improve the hot water output speed. If the user needs room temperature water, the pure water in the external pure water tank 31 is discharged.

[0053] Preferably, the control method of the present invention further includes the following steps: obtaining the duration for which the pure water in the pure water tank 3 has not been used; and selectively re-filtering the pure water in the pure water tank 3 according to the duration.

[0054] By monitoring the water usage of the pure water tank 3, when the pure water in the pure water tank 3 has not been used for a long time, the pure water in the pure water tank 3 can be re-filtered in a timely manner to keep the pure water in the pure water tank 3 fresh and improve the water quality for users.

[0055] In the case where a built-in pure water tank 32 and an external pure water tank 31 are provided, the water usage in the external pure water tank 31 is monitored. For example, as shown in the example... Figure 3 As shown, when the pure water in the external pure water tank 31 has not been used for a long time, the first port of the three-way solenoid valve is connected to the third port, and the raw water pump 11 is started, so that the pure water in the external pure water tank 31 returns to the external pure water tank 31 after being filtered by the filter assembly 20.

[0056] It should be noted that when the pure water in the external pure water tank 31 needs to be re-filtered, the water in the external pure water tank 31 can be first pumped into the original water tank 70, and then the water in the original water tank 70 can be pumped out, filtered through the filter component 20, and then returned to the external pure water tank 31.

[0057] Preferably, the step of "selectively re-filtering the pure water in the pure water tank 3 according to the duration" specifically includes: comparing the duration with a first preset time; if the duration is greater than or equal to the first preset time, then re-filtering the pure water in the pure water tank 3.

[0058] For example, the first preset time is 48 hours. When the time when the pure water in the external pure water tank 31 has not been used for 48 hours or more, the pure water in the external pure water tank 31 needs to be filtered again.

[0059] It should be noted that the first preset time is not limited to the aforementioned 48 hours. For example, the first preset time can also be set to 24 hours, 36 hours, or 60 hours. Those skilled in the art can flexibly set the specific value of the first preset time based on experiments or experience in practical applications.

[0060] Preferably, the water purifier of the present invention has a first sterilization mode. When the first sterilization mode is executed, the first heating component 53 is activated to heat the water in the water outlet pipe 51 in order to sterilize the water outlet pipe 51.

[0061] By heating the water in the outlet pipe 51, the water temperature is increased. The high-temperature water can sterilize the outlet pipe 51, ensuring the quality of water for users.

[0062] Preferably, such as Figure 4 As shown, the water purifier of the present invention also includes a first sterilization pipeline 80. The two ends of the first sterilization pipeline 80 are respectively connected to the water outlet pipeline 51 and the pure water tank 3. The connection point between the water outlet pipeline 51 and the first sterilization pipeline 80 is located downstream of the water outlet pump 52 and the first heating component 53 and upstream of the water outlet component 54. The water purifier also has a second sterilization mode. When the second sterilization mode is executed, the water outlet pump 52 and the first heating component 53 are started, so that hot water circulates between the water outlet pipeline 51, the first sterilization pipeline 80 and the pure water tank 3.

[0063] In other words, the water purifier of the present invention can sterilize not only the water outlet pipe 51, but also the pure water tank 3.

[0064] For example, such as Figure 4 As shown, when an external pure water tank 31 and an internal pure water tank 32 are provided, the first sterilization pipeline 80 is only connected to the external pure water tank 31. When the second sterilization mode is executed, the water pump 52 and the first heating component 53 are started, and hot water can circulate between the water outlet pipeline 51, the first sterilization pipeline 80 and the external pure water tank 31.

[0065] It should be noted that, in the case of having an external pure water tank 31 and an internal pure water tank 32, the first sterilization pipe 80 can be connected only to the internal pure water tank 32. When the second sterilization mode is executed, the hot water can circulate between the outlet pipe 51, the first sterilization pipe 80, and the internal pure water tank 32. Alternatively, the first sterilization pipe 80 can be connected to both the external pure water tank 31 and the internal pure water tank 32. When the second sterilization mode is executed, the hot water can circulate between the outlet pipe 51, the first sterilization pipe 80, the external pure water tank 31, and the internal pure water tank 32.

[0066] Preferably, the control method of the present invention includes: first executing a first sterilization mode, and after the running time of the first sterilization mode reaches a second preset time, executing a second sterilization mode.

[0067] For example, the second preset time is 8 minutes. When sterilization is required, the first sterilization mode is executed first, and the water temperature in the water outlet pipe 51 can reach about 75°C. After the first sterilization mode has been running for 8 minutes, the water outlet pump 52 is started, so that the hot water circulates between the water outlet pipe 51, the first sterilization pipe 80, and the external pure water tank 31 / internal pure water tank 32.

[0068] It should be noted that the second preset time is not limited to the aforementioned 8 minutes; for example, it can also be set to 3 minutes, 5 minutes, 10 minutes, or 15 minutes, etc. Of course, the present invention preferably sets the second preset time to 5 to 10 minutes. The running time of the second sterilization mode is also preferably set to 5 to 10 minutes.

[0069] In addition, it should be noted that during the execution of the first sterilization mode and the second sterilization mode, the water outlet solenoid valve 55 on the water outlet pipe 51 must be kept closed to prevent hot water from being discharged from the water outlet component 54 and causing a risk of scalding.

[0070] Preferably, such as Figure 5 As shown, the water purifier of the present invention also includes a second sterilization pipe 90. The two ends of the second sterilization pipe 90 are respectively connected to the water outlet pipe 51 and the raw water tank 70. The connection point between the water outlet pipe 51 and the second sterilization pipe 90 is located downstream of the water outlet pump 52 and the first heating component 53 and upstream of the water outlet component 54. The water purifier also has a third sterilization mode. When the third sterilization mode is executed, the water outlet pump 52 and the first heating component 53 are started so that hot water enters the raw water tank 70.

[0071] By connecting the raw water tank 70 directly to the outlet water pipe 51 through the second sterilization pipe 90, hot water can be introduced into the raw water tank 70 to prevent bacteria from growing in the raw water tank 70, thereby improving the quality of the output water.

[0072] For example, such as Figure 5As shown, a sterilization solenoid valve 91 is installed on the second sterilization pipeline 90. The sterilization solenoid valve 91 is used to control the opening and closing of the second sterilization pipeline 90. When the third sterilization mode is executed, the sterilization solenoid valve 91 is turned on, the first heating component 53 and the water pump 52 are started. The water pump 52 draws out pure water from the external pure water tank 31. After being heated by the first heating component 53, the pure water enters the raw water tank 70 along the second sterilization pipeline 90.

[0073] It should be noted that when executing the third sterilization mode, the pure water in the built-in pure water tank 32 can also be extracted. After being heated by the first heating component 53, the pure water enters the raw water tank 70 along the second sterilization pipeline 90.

[0074] In addition, it should be noted that, in practical applications, those skilled in the art can set a sterilization cycle (e.g., 36 hours, 48 ​​hours, 72 hours, 5 days, or 7 days) for each of the three sterilization modes mentioned above, or they can set a sterilization button so that the user can activate the corresponding sterilization mode through the sterilization button, and so on.

[0075] It should be noted that the control method provided in this embodiment can be stored as a program in a computer-readable storage medium. This storage medium includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute some steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, portable hard drive, read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0076] Those skilled in the art will understand that although some embodiments described herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, any of the claimed embodiments in the claims of this application can be used in any combination.

[0077] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A control method for a water purifier, characterized in that, The water purifier includes an inlet pipe (10), a raw water pump (11), a filter assembly (20), a pure water tank (3), a first pipe (12), a flushing pipe (60), a control valve (40), and an outlet assembly (5). The raw water pump (11) is installed on the inlet pipe (10). The inlet and outlet of the inlet pipe (10) are connected to the water source and the filter assembly (20), respectively. The filter assembly (20) is connected to the inlet of the pure water tank (3) through the first pipe (12). The outlet of the pure water tank (3) is connected to the outlet assembly (5). The inlet of the flushing pipe (60) is connected to the water source and the filter assembly (20). The flushing pipe (60) is connected to the pure water tank (3), and the outlet end of the flushing pipe (60) is connected to the inlet pipe (10), with the connection point located upstream of the raw water pump (11). The control valve (40) is installed on the inlet pipe (10) and the flushing pipe (60). The control valve (40) has a first working mode and a second working mode. When the control valve (40) is in the first working mode, the inlet pipe (10) is connected to the water source. When the control valve (40) is in the second working mode, the inlet pipe (10) is connected to the flushing pipe (60). The control method includes: When the water purifier stops producing water, the control valve (40) is switched to the second working mode; The raw water pump (11) is operated to introduce pure water from the pure water tank (3) into the water inlet pipe (10) and the filter element of the filter assembly (20).

2. The control method for a water purifier according to claim 1, characterized in that, The control method further includes: Obtain the duration for which the pure water in the pure water tank (3) has not been used; Depending on the duration, the pure water in the pure water tank (3) is selectively re-filtered.

3. The control method for a water purifier according to claim 2, characterized in that, The step of "selectively re-filtering the pure water in the pure water tank (3) according to the duration" specifically includes: Compare the duration with a first preset time; If the duration is greater than or equal to the first preset time, the pure water in the pure water tank (3) is filtered again.

4. The control method for a water purifier according to claim 1, characterized in that, The water outlet assembly (5) includes a water outlet pipe (51), a water outlet component (54), a water outlet pump (52) and a first heating component (53) installed on the water outlet pipe (51). The water inlet and outlet of the water outlet pipe (51) are respectively connected to the pure water tank (3) and the water outlet component (54). The water purifier has a first sterilization mode. When the first sterilization mode is executed, the first heating component (53) is activated to heat the water in the water outlet pipe (51) to sterilize the water outlet pipe (51).

5. The control method for a water purifier according to claim 4, characterized in that, The water purifier also includes a first sterilization pipeline (80), the two ends of which are connected to the outlet pipeline (51) and the pure water tank (3) respectively. The connection point between the outlet pipeline (51) and the first sterilization pipeline (80) is located downstream of the outlet pump (52) and the first heating component (53) and upstream of the outlet component (54). The water purifier also has a second sterilization mode. When the second sterilization mode is executed, the outlet pump (52) and the first heating component (53) are started, so that hot water circulates between the outlet pipeline (51), the first sterilization pipeline (80) and the pure water tank (3).

6. The control method for a water purifier according to claim 5, characterized in that, The control method includes: First, the first sterilization mode is executed. After the first sterilization mode has been running for a second preset time, the second sterilization mode is then executed.

7. The control method for a water purifier according to claim 4, characterized in that, The water purifier also includes a raw water tank (70) and a second sterilization pipeline (90). The raw water tank (70) is the water source. The two ends of the second sterilization pipeline (90) are connected to the outlet pipeline (51) and the raw water tank (70) respectively. The connection point between the outlet pipeline (51) and the second sterilization pipeline (90) is located downstream of the outlet pump (52) and the first heating component (53) and upstream of the outlet component (54). The water purifier also has a third sterilization mode. When the third sterilization mode is executed, the outlet pump (52) and the first heating component (53) are started so that hot water enters the raw water tank (70).

8. The control method for a water purifier according to any one of claims 1 to 7, characterized in that, The pure water tank (3) includes an external pure water tank (31) and an internal pure water tank (32) connected in parallel. Both the external pure water tank (31) and the internal pure water tank (32) are connected to the first pipeline (12) and to the water outlet assembly (5). The flushing pipeline (60) is connected to the external pure water tank (31); and / or The control valve (40) is a three-way solenoid valve. The first port of the three-way solenoid valve is connected to the flushing pipeline (60), the second port of the three-way solenoid valve is connected to the water source, and the third port of the three-way solenoid valve is connected to the water inlet pipeline (10). When the control valve (40) is in the first working mode, the second port is connected to the third port. When the control valve (40) is in the second working mode, the first port is connected to the third port.

9. The control method for a water purifier according to claim 8, characterized in that, The built-in pure water tank (32) is equipped with a second heating component.

10. A water purifier, comprising a controller, characterized in that, The controller is configured to perform the control method according to any one of claims 1 to 9.

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