Water supply equipment, cleaning method thereof and computer readable storage medium

Abstract

The invention relates to water supply equipment, a cleaning method thereof and a computer storage medium, and the cleaning method comprises the following steps: calculating the residual service life of a composite filter element and the residual service life of a reverse osmosis filter element; according to the fact that the remaining service life of the composite filter element is smaller than a first preset service life value and the remaining service life of the reverse osmosis filter element is larger than a second preset service life value, element replacement cleaning prompt information is sent out; replacing the composite filter element with a cleaning filter element according to the element replacement cleaning prompt information; washing the reverse osmosis filter element; according to the cleaning method, the cleaning filter element is used for cleaning the reverse osmosis filter element, so that raw water impurities attached to the reverse osmosis filter element are removed, the service life of the reverse osmosis filter element is prolonged, the residual use value of the reverse osmosis filter element is fully utilized, resources are saved, and the use cost of water supply equipment is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of water purification equipment, and in particular to a water supply equipment and a cleaning method thereof, and a computer-readable storage medium. Background Art

[0002] With the improvement of material living standards, water supply equipment has gradually become a standard for quality life. Among them, reverse osmosis water purifiers are very popular because they can effectively remove a variety of pollutants in tap water. In existing equipment, water supply equipment is often limited by the service life of the pre-filter element. After the service life of the pre-filter element expires, the filter module of the water supply equipment needs to be replaced as a whole, but the reverse osmosis filter element is still useful, and the replacement of the filter module as a whole causes a waste of resources. Summary of the invention

[0003] The purpose of the present invention is to at least solve the problem of waste of resources caused by replacing the whole filter module when the reverse osmosis filter element has use value. This purpose is achieved by the following methods:

[0004] A first aspect of the present invention proposes a cleaning method for water supply equipment, wherein the water supply equipment includes a composite filter element, a cleaning filter element and a reverse osmosis filter element, and the cleaning method includes: calculating the remaining service life of the composite filter element and the remaining service life of the reverse osmosis filter element; issuing a core replacement and cleaning reminder message based on the remaining service life of the composite filter element being less than a first preset life value and the remaining service life of the reverse osmosis filter element being greater than a second preset life value; replacing the composite filter element with the cleaning filter element based on the core replacement and cleaning reminder message; flushing the reverse osmosis filter element; wherein the first preset life value is greater than or equal to zero, and the second preset life value is greater than or equal to zero.

[0005] According to the cleaning method of the water supply equipment of the present invention, when the service life of the composite filter element in the water supply equipment reaches the preset service life (that is, the remaining service life of the composite filter element is less than the first preset service life value), and the service life of the reverse osmosis filter element has not reached the preset service life (that is, the remaining service life of the reverse osmosis filter element is greater than the second preset service life value), the composite filter element is replaced by a cleaning filter element, and the reverse osmosis filter element is rinsed with the cleaning filter element to remove raw water impurities attached to the reverse osmosis filter element, extend the service life of the reverse osmosis filter element, and solve the problem of raw water impurities clogging the reverse osmosis filter element and slow water production speed due to long-term use. After the reverse osmosis filter element is cleaned, the cleaning filter element is replaced by a new composite filter element, and the cleaned reverse osmosis filter element continues to be used, making full use of the remaining use value of the reverse osmosis filter element, saving resources, and saving the use cost of the water supply equipment.

[0006] In addition, the cleaning method of the water supply equipment according to the present invention may also have the following additional technical features:

[0007] In some embodiments of the present invention, the step of calculating the remaining service life of the composite filter element includes: obtaining the total service life T1 of the composite filter element; accumulating the water production time t1 of the water supply equipment; and calculating the remaining service life of the composite filter element based on T1 minus t1.

[0008] In some embodiments of the present invention, the step of calculating the remaining service life of the reverse osmosis filter element includes: calculating the theoretical total filtered water volume L1 of the reverse osmosis filter element during its service life; calculating the real-time cumulative water production volume p of the reverse osmosis filter element; based on the real-time cumulative water production volume p being greater than or equal to 1 liter, adding 1 liter to the actual cumulative water production volume P of the reverse osmosis filter element; and calculating the remaining service life of the reverse osmosis filter element based on the actual cumulative water production volume P and the theoretical total filtered water volume L1.

[0009] In some embodiments of the present invention, the step of calculating the remaining service life of the reverse osmosis filter element based on the actual cumulative water production amount P and the theoretical total filtered water volume L1 includes: calculating the filtered water volume L2 of the reverse osmosis filter element for every 1% of the service life based on the theoretical total filtered water volume L1 / 100; adding 1% to the percentage F of the service life of the reverse osmosis filter element based on a*L2<P<b*L2; calculating the remaining service life of the reverse osmosis filter element based on 100%-F; wherein a and b are constants, and 0.8<a≤1, 1<b<1.2.

[0010] In some embodiments of the present invention, the cleaning method further includes: according to the percentage F of the service life of the reverse osmosis filter element plus 1%, the actual water production cumulative amount P is cleared, and the step of calculating the real-time water production cumulative amount p of the reverse osmosis filter element is returned to execute.

[0011] In some embodiments of the present invention, the cleaning method also includes: calculating the maximum available time H of the service life of the reverse osmosis filter element according to the (L1 / 10)*24; calculating the usage time t2 of the reverse osmosis filter element for every 1% of the service life according to the maximum available time H / 100; calculating the real-time power-on cumulative time t3 of the reverse osmosis filter element; according to the real-time cumulative water production volume p being less than 1 liter and the real-time power-on cumulative time t3 being greater than or equal to 1 hour, the actual power-on cumulative time H2 of the reverse osmosis filter element is accumulated by 1 hour; according to a*t2<H2<b*t2, the service life percentage F of the reverse osmosis filter element is accumulated by 1%; and calculating the remaining service life of the reverse osmosis filter element according to 100%-F; wherein a and b are constants, and 0.8<a≤1, 1<b<1.2.

[0012] In some embodiments of the present invention, the cleaning method further includes: according to the service life percentage F of the reverse osmosis filter element plus 1%, the actual power-on cumulative time H2 is cleared, and the step of calculating the real-time power-on cumulative time t3 of the reverse osmosis filter element is returned to execute.

[0013] In some embodiments of the present invention, the water supply equipment also includes a water production main circuit, a wastewater branch circuit, and a flushing branch circuit. The water production main circuit includes a water inlet section, a water branch circuit, and a water outlet section that are connected in sequence. The composite filter element includes a pre-filter element and a post-filter element. The pre-filter element, the reverse osmosis filter element, and the post-filter element are arranged in the water branch circuit in sequence. The water inlet of the wastewater branch circuit is connected with the wastewater outlet of the reverse osmosis filter element. The water inlet of the flushing branch circuit is connected with the pure water outlet of the post-filter element through the water branch circuit. In the step of flushing the reverse osmosis filter element, it includes: controlling the water inlet section, the water branch circuit, and the wastewater branch circuit to be connected in sequence; performing a first round of flushing on the reverse osmosis filter element and continuing for a first time period; and sending a first second water tank water change signal.

[0014] In some embodiments of the present invention, the cleaning method further includes: replacing the raw water in the second water tank according to the first second water tank water change signal; performing a second round of flushing on the reverse osmosis filter element and continuing for a second time period; the second time period is greater than the first time period.

[0015] In some embodiments of the present invention, after the second round of flushing step, the cleaning method also includes: issuing a second second water tank water change signal; replacing the raw water in the second water tank according to the second second water tank water change signal; controlling the water inlet section, the water branch and the flushing branch to be connected in sequence, controlling the wastewater branch and the water outlet section to be disconnected, and performing a third round of flushing on the reverse osmosis filter element and continuing for a third time period.

[0016] In some embodiments of the present invention, after the third round of flushing, the cleaning method further includes: replacing the cleaning filter element with a new composite filter element; controlling the water inlet section, the water branch, the flushing branch and the wastewater branch to be connected in sequence, controlling the water outlet section to be disconnected, and flushing the composite filter element and the reverse osmosis filter element for a fourth time period.

[0017] The second aspect of the present invention further proposes a water supply equipment, which includes a water production main circuit, a wastewater branch circuit, a flushing branch circuit, a cleaning filter element, a composite filter element, a reverse osmosis filter element and a control device. The water production main circuit includes an inlet section, a water branch circuit and a water outlet section that are connected in sequence. The composite filter element includes a pre-filter element and a post-filter element. The pre-filter element, the reverse osmosis filter element and the post-filter element are arranged in the water branch circuit in sequence. The cleaning filter element can replace the composite filter element to be arranged in the water branch circuit. The water inlet of the wastewater branch circuit is connected to the wastewater outlet of the reverse osmosis filter element, and the water inlet of the flushing branch circuit is connected to the pure water outlet of the post-filter element through the water branch circuit. The control device includes a memory and at least one processor. The memory stores a computer program that can be run on the processor. When the computer program is executed by the processor, the cleaning method of the water supply equipment described in any one of the technical solutions of the first aspect is implemented.

[0018] The third aspect of the present invention further proposes a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, a method for cleaning a water supply device as described in any one of the technical solutions of the first aspect is implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. Among them:

[0020] Figure 1 A schematic diagram of the internal structure of a water supply device according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic structural diagram of a composite filter element, a reverse osmosis filter element, and a waterway adapter plate according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic structural diagram of a waterway adapter plate according to an embodiment of the present invention;

[0023] Figure 4 This is a schematic structural diagram of a cleaning filter element according to an embodiment of the present invention;

[0024] Figure 5 A schematic block diagram of the water connection of various components in a water supply device according to an embodiment of the present invention;

[0025] Figure 6 It is a block diagram schematic diagram of a control device according to an embodiment of the present invention being electrically connected to a self-priming pump, a first solenoid valve, a second solenoid valve and a wastewater valve respectively;

[0026] Figure 7 A flowchart of a method for cleaning a water supply device according to an embodiment of the present invention;

[0027] Figure 8 A flowchart of a method for calculating the remaining service life of a composite filter element according to an embodiment of the present invention;

[0028] Fig. 9 A flowchart of a method for calculating the remaining service life of a reverse osmosis filter element according to an embodiment of the present invention;

[0029] Fig.10 This is a flowchart of a method for calculating the remaining service life of a reverse osmosis filter element according to the actual cumulative water production amount P and the theoretical total filtered water amount L1 according to one embodiment of the present invention;

[0030] Fig.11 A flowchart of a method for calculating the remaining service life of a reverse osmosis filter element according to another embodiment of the present invention;

[0031] Fig.12 A flowchart of a method for calculating the remaining service life of a reverse osmosis filter element according to another embodiment of the present invention;

[0032] Fig.13 This is a flowchart of a method for flushing a reverse osmosis filter element according to an embodiment of the present invention;

[0033] Fig.14 This is a flowchart of a method for flushing a reverse osmosis filter element according to another embodiment of the present invention.

[0034] The reference numerals in the accompanying drawings represent the following:

[0035] 1. Water supply equipment;

[0036] 31. Composite filter element; 32. Reverse osmosis filter element; 301. Cleaning filter element;

[0037] 38, water circuit adapter plate; 381, first plug group; 3811, first plug; 3812, second plug; 3813, third plug; 3814, fourth plug; 382, ​​second plug group; 3821, fifth plug; 3822, sixth plug; 3823, seventh plug; 383, first water inlet branch; 384, first water outlet branch; 385, second water inlet branch; 386, second water outlet branch; 387, wastewater passage;

[0038] 34. First one-way valve; 35. Second one-way valve; 36. First solenoid valve; 37. Second solenoid valve; 391. First TDS probe; 392. Second TDS probe; 310. Self-priming pump;

[0039] 20. First water tank; 12. Second water tank;

[0040] 81, main water supply route; 811, water inlet section; 812, water outlet section;

[0041] 82. Wastewater branch; 821. Wastewater valve;

[0042] 83. Flushing branch;

[0043] 200. Control device; 2001. Processor; 2002. Memory. DETAILED DESCRIPTION

[0044] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0045] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0046] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0047] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is rotated, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both above and below orientations.

[0049] According to the embodiment of the present invention, please combine Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, a water supply device 1 is proposed, which includes a water production main path 81, a wastewater branch path 82, a composite filter element 31, a cleaning filter element 301 and a reverse osmosis filter element 32. The water production main path 81 includes an inlet section 811, a water channel branch path and a water outlet section 812 that are connected in sequence. Along the flow direction of raw water, the water supply device 1 also includes a first installation part and a second installation part that are sequentially arranged on the water channel branch path. One of the composite filter element 31 and the cleaning filter element 301 can be selectively installed in the first installation part, and the reverse osmosis filter element 32 is installed in the second installation part. The water inlet of the wastewater branch path 82 is connected to the wastewater port of the reverse osmosis filter element 32. Specifically, when the composite filter element 31 is installed in the first installation part, the raw water first flows along the water production main path 81 to the composite filter element 31 of the first installation part, and the raw water is filtered for the first time by the composite filter element 31 to remove some impurities and pollutants. The water filtered by the composite filter element 31 continues to flow to the reverse osmosis filter element 32 installed in the second installation part for a second filtration. The reverse osmosis filter element 32 can efficiently remove tiny particles, heavy metal ions, organic matter, etc. in the water, and generates pure water and waste water after filtration. The pure water flows back to the main water production line 81 and is output to the outside to provide pure drinking water to users, while the waste water is discharged through the wastewater branch line 82.

[0050] According to the water supply equipment 1 of the present invention, when the service life of the composite filter element 31 in the water supply equipment 1 reaches the preset service life and the service life of the reverse osmosis filter element 32 has not reached the preset service life, the cleaning filter element 301 replaces the composite filter element 31 and is installed on the first installation part, so that the cleaning filter element 301 can be used to clean the reverse osmosis filter element 32. The cleaning filter element 301 can generate a specific water flow or chemical action to remove raw water impurities attached to the reverse osmosis filter element 32, extend the service life of the reverse osmosis filter element 32, and solve the problem of raw water impurities clogging the reverse osmosis filter element 32 and slow water production speed due to long-term use. After the reverse osmosis filter element 32 is cleaned, the new composite filter element 31 replaces the cleaning filter element 301 and is installed on the first installation part, and the cleaned reverse osmosis filter element 32 continues to be used, so as to make full use of the remaining use value of the reverse osmosis filter element 32, save resources, and save the use cost of the water supply equipment 1.

[0051] It should be noted that there can be multiple types of cleaning filter element 301, such as physical cleaning filter element 301, chemical cleaning filter element 301, etc. Physical cleaning filter element 301 can remove impurities by mechanical action or water flow impact, and chemical cleaning filter element 301 can dissolve or decompose impurities by releasing specific chemicals.

[0052] In this embodiment, the cleaning filter element 301 is a chemical cleaning filter element 301, and the cleaning filter element 301 mainly releases specific chemicals to dissolve or decompose raw water impurities attached to the reverse osmosis filter element 32. When water flows through the cleaning filter element 301, the cleaning filter element 301 releases chemicals, and the chemicals flow to the reverse osmosis filter element 32 with the water, so that the chemicals in the cleaning filter element 301 react chemically with the impurities in the reverse osmosis filter element 32, so that they are separated from the surface or pores of the reverse osmosis filter element 32. For example, for some scale impurities formed by calcium, magnesium ions, etc., the chemical cleaning filter element 301 may release acidic substances, which react with the scale to convert it into soluble salts, which are then washed away by the water flow. For organic impurities, chemical substances such as oxidants may be released to oxidize and decompose the organic matter into smaller molecules, making it easier to be washed away, so as to achieve the purpose of removing raw water impurities attached to the reverse osmosis filter element 32, preventing impurities from clogging the reverse osmosis filter element 32, and extending the service life of the reverse osmosis filter element 32.

[0053] Understandably, a cleaning filter element 301 using a combination of multiple chemical substances can be selected according to the specific conditions of the impurities on the reverse osmosis filter element 32. For example, in the case of both scale and organic impurities, the cleaning filter element 301 can release acidic substances and oxidants at the same time to achieve a better cleaning effect.

[0054] In some embodiments, please combine Figure 1 , Figure 2, Figure 3 and Figure 4 As shown, the water supply equipment 1 also includes a water channel adapter plate 38, and the water channel branch includes a plurality of mutually blocked water channel passages arranged inside the water channel adapter plate 38. The first mounting portion is configured as a first plug group 381 arranged on the water channel adapter plate 38 and connected to the water channel passage. The first plug group 381 includes a plurality of plugs protruding from the water channel adapter plate 38 and connected to the water channel in the water channel adapter plate 38. The composite filter element 31 or the cleaning filter element 301 is provided with a socket that cooperates with the plug in the first plug group 381. The composite filter element 31 or the cleaning filter element 301 is detachably plugged into the first plug group 381. When it is necessary to replace the composite filter element 31 or use the cleaning filter element 301 to clean the reverse osmosis filter element 32, it is only necessary to unplug the corresponding composite filter element 31 or the cleaning filter element 301 from the first plug group 381 and then insert a new filter element. The operation is very convenient.

[0055] The second mounting portion is configured as a second plug group 382 disposed on the water channel adapter plate 38 and connected to the water channel. The second plug group 382 includes a plurality of plugs protruding from the water channel adapter plate 38 and connected to the water channel in the water channel adapter plate 38. The reverse osmosis filter element 32 is provided with a socket that is plugged into and matched with the plug in the second plug group 382. The reverse osmosis filter element 32 is plugged into the second plug group 382 in a detachable manner, which is convenient for operation when the reverse osmosis filter element 32 needs to be maintained or replaced.

[0056] Please combine Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the water inlet section 811 is connected to the water outlet section 812 through the water channel adapter plate 38, and the raw water enters the water channel adapter plate 38 from the water inlet section 811, passes through the composite filter element 31 and the reverse osmosis filter element 32, and then flows into the water outlet section 812 from the water channel adapter plate 38, and finally outputs pure water to the outside. Alternatively, in the process of cleaning the reverse osmosis filter element 32, the raw water enters the water channel adapter plate 38 from the water inlet section 811, passes through the cleaning filter element 301 and the reverse osmosis filter element 32, and then flows out from the wastewater branch 82, thereby completing the cleaning operation of the reverse osmosis filter element 32.

[0057] In this embodiment, the composite filter element 31 or the cleaning filter element 301 is plugged into the first plug group 381 in a detachable manner, so as to facilitate the rapid replacement of the composite filter element 31 and the cleaning filter element 301 and install them in the water supply device 1, simplifying the cleaning steps of the reverse osmosis filter element 32, and the plugging operation of the composite filter element 31 and the cleaning filter element 301 is simple and convenient, and does not require professional technicians to operate, and ordinary users can also easily complete it. This reduces the difficulty of cleaning the reverse osmosis filter element 32, allowing users to more conveniently maintain the water supply device 1, ensuring the normal operation of the equipment and the safety of water quality.

[0058] In detail, the water channel branch includes a first water inlet branch 383, a first water outlet branch 384, a second water inlet branch 385, a second water outlet branch 386 and a waste water passage 387, and the water outlet end of the waste water passage 387 is connected to the water inlet end of the waste water branch 82. The first plug group 381 includes a first plug 3811 connected to the first water inlet branch 383, a second plug 3812 connected to the water inlet end of the first water outlet branch 384, a third plug 3813 connected to the water outlet end of the second water inlet branch 385, and a fourth plug 3814 connected to the water inlet end of the second water outlet branch 386. The second plug group 382 includes a fifth plug 3821 connected to the water outlet end of the first water outlet branch 384, a sixth plug 3822 connected to the water inlet end of the second water inlet branch 385, and a seventh plug 3823 connected to the water inlet end of the waste water passage 387.

[0059] The cleaning filter element 301 is provided with four jacks, which are detachably connected to the first plug 3811, the second plug 3812, the third plug 3813 and the fourth plug 3814 respectively. The reverse osmosis filter element 32 is provided with three jacks, which are detachably connected to the fifth plug 3821, the sixth plug 3822 and the seventh plug 3823 respectively, so that when the cleaning filter element 301 is installed in the first installation position, the cleaning filter element 301 is connected to the water inlet section 811 through the first water inlet branch 383, and is connected to the reverse osmosis filter element 32 through the first water outlet branch 384. The cleaning filter element 301 is also connected to the reverse osmosis filter element 32 through the second water inlet branch 385, and is connected to the water outlet section 812 through the second water outlet branch 386. The reverse osmosis filter element 32 is connected to the wastewater branch 82 through the wastewater passage 387.

[0060] In this embodiment, Figure 5As shown, in the process of cleaning the reverse osmosis filter element 32, the flow path of the raw water is the water inlet section 811, the first water inlet branch 383, the first plug 3811, the cleaning filter element 301, the second plug 3812, the first water outlet branch 384, the fifth plug 3821, the reverse osmosis filter element 32, the seventh plug 3823, the waste water passage 387, the waste water branch 82, and the waste water after flushing the reverse osmosis filter element 32 is discharged through the waste water branch 82. The above raw water flow sequence can be used to fully flush the reverse osmosis filter element 32 by flushing the filter element. It should be noted that in the process of cleaning the reverse osmosis filter element 32, the flow of raw water also includes another flow path, which is the water inlet section 811, the first water inlet branch 383, the first plug 3811, the cleaning filter element 301, the second plug 3812, the first water outlet branch 384, the fifth plug 3821, the reverse osmosis filter element 32, the sixth plug 3822, the second water inlet branch 385, the third plug 3813, the cleaning filter element 301, the fourth plug 3814, and the second water outlet branch 386. The waste water after flushing the reverse osmosis filter element 32 is discharged through the second water outlet branch 386. In this way, the reverse osmosis filter element 32 can be flushed from two different paths to ensure that the water flow can reach different parts of the reverse osmosis filter element 32, including some hard-to-reach corners and pores. In this way, impurities attached to the filter element can be removed more comprehensively, and the thoroughness of cleaning can be improved. Water flows in different paths can produce different flushing directions and forces, forming multi-angle impacts on impurities. For example, water flow in one path can pass through the reverse osmosis filter element 32 and then flush the reverse osmosis filter element 32 from the waste water outlet of the reverse osmosis filter element 32, and water flow in another path can pass through the reverse osmosis filter element 32 and flush the reverse osmosis filter element 32 from the pure water outlet of the reverse osmosis filter element 32 (that is, the socket that is plugged into and cooperates with the sixth plug 3822), thereby more comprehensively removing impurities attached to the reverse osmosis filter element 32 and improving the thoroughness of cleaning.

[0061] In some embodiments, please combine Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the composite filter element 31 includes a front filter element (not shown in the figure) and a rear filter element (not shown in the figure), the front filter element is provided with a jack that matches the first plug 3811 and the second plug 3812, and the rear filter element is provided with a jack that matches the third plug 3813 and the fourth plug 3814. When the composite filter element 31 is installed in the first installation position, the front filter element is connected to the first water inlet branch 383 and the first outlet branch 384 through the first plug 3811 and the second plug 3812. The water branch 384 is connected, and the post-filter element is connected to the second water inlet branch 385 and the second water outlet branch 386 through the third plug 3813 and the fourth plug 3814 respectively, so that the pre-filter element is connected to the water inlet section 811 through the first water inlet branch 383, and is connected to the reverse osmosis filter element 32 through the first water outlet branch 384, and the post-filter element is connected to the reverse osmosis filter element 32 through the second water inlet branch 385, and is connected to the water outlet section 812 through the second water outlet branch 386.

[0062] During the water production process of the water supply device 1, the flow path of the raw water is the water inlet section 811, the first water inlet branch 383, the first plug 3811, the pre-filter, the second plug 3812, the first water outlet branch 384, the fifth plug 3821, and the reverse osmosis filter 32. After the raw water enters the reverse osmosis filter 32, pure water and waste water will be generated. The pure water passes through the sixth plug 3822, the second water inlet branch 385, the third plug 3813, the post-filter, the fourth plug 3814, the second water outlet branch 386, and the water outlet section 812 in sequence, and the waste water is discharged from the waste water port of the reverse osmosis filter 32 through the seventh plug 3823, the waste water passage 387, and the waste water branch 82. That is, the raw water first passes through the pre-filter for the first filtration, then passes through the reverse osmosis filter 32 for the second filtration, and then passes through the post-filter for the third filtration, and the pure water generated is finally output through the water outlet section 812.

[0063] In this embodiment, please combine Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the water supply device 1 also includes a flushing branch 83, and the water inlet of the flushing branch 83 is connected to the water outlet of the second water outlet branch 386. By setting the flushing branch 83, when flushing the reverse osmosis filter element 32, the pure water outlet of the reverse osmosis filter element 32 can also be flushed, that is, the flushing path is the water inlet section 811, the first water inlet branch 383, the first plug 3811, the cleaning filter element 301, the second plug 3812, the first water outlet branch 384, the fifth plug 3821, the reverse osmosis filter element 32, the sixth plug 3822, the second water inlet branch 385, the third plug 3813, the cleaning filter element 301, the fourth plug 3814, the second water outlet branch 386, and the flushing branch 83, and the waste water after flushing the reverse osmosis filter element 32 is discharged through the flushing branch 83.

[0064] Furthermore, the water supply device 1 further includes a first one-way valve 34, a second one-way valve 35, a first water tank 20, a second water tank 12 and a self-priming pump 310. The first one-way valve 34 is arranged on the second water inlet branch, and the first one-way valve 34 is unidirectionally conducted in the direction from the reverse osmosis filter element 32 to the post-filter element. The pure water filtered by the reverse osmosis filter element 32 flows from the pure water outlet of the reverse osmosis filter element 32 into the second water inlet branch 385 and then flows into the post-filter element through the first one-way valve 34 and the third plug 3813. The second one-way valve 35 is arranged on the flushing branch 83, and the second one-way valve 35 is unidirectionally conducted in the direction from the second water outlet branch 386 to the second water tank 12. The first water tank 20 is connected to the water outlet of the water outlet section 812, and the second water tank 12 is respectively connected to the water inlet of the water inlet section 811, the water outlet of the wastewater branch 82 and the water outlet of the flushing branch 83. The self-priming pump 310 is arranged in the water inlet section 811 and is used to drive the water in the water inlet section 811 to flow from the water inlet of the water inlet section 811 to the first water inlet branch 383. In the process of flushing the pure water outlet of the reverse osmosis filter element 32, the second one-way valve 35 can prevent the water containing impurities after flushing the reverse osmosis filter element 32 from flowing back from the second water tank 12 to the second water outlet branch 386 and the water outlet section 812, so as to prevent the water outlet section 812 and the first water tank 20 connected to the water outlet section 812 from being polluted.

[0065] Furthermore, the water supply device 1 further includes a first solenoid valve 36, a second solenoid valve 37 and a wastewater valve 821, wherein the first solenoid valve 36 is arranged at the water outlet section 812, the second solenoid valve 37 is arranged at the flushing branch 83, and the wastewater valve 821 is arranged at the wastewater branch 82. The first solenoid valve 36 and the second solenoid valve 37 respectively control the connection or closing of the water outlet section 812 and the flushing branch 83, thereby controlling the path of water flow. The wastewater valve 821 controls the water flow of the wastewater branch 82 by controlling the size of its own opening.

[0066] In detail, in the process of cleaning the reverse osmosis filter element 32 using the cleaning filter element 301, in the path of flushing the reverse osmosis filter element 32 through the wastewater branch 82, the first solenoid valve 36 and the second solenoid valve 37 are closed, and the wastewater valve 821 increases its opening. The flow path of the raw water is, in sequence, the water inlet section 811, the first water inlet branch 383, the first plug 3811, the cleaning filter element 301, the second plug 3812, the first water outlet branch 384, the fifth plug 3821, the reverse osmosis filter element 32, the seventh plug 3823, the wastewater passage 387, and the wastewater branch 82. The wastewater after flushing the reverse osmosis filter element 32 is discharged through the wastewater branch 82.

[0067] In the path of flushing the reverse osmosis filter element 32 using the flushing branch 83, the first solenoid valve 36 is closed, the second solenoid valve 37 is opened, and the waste water valve 821 is reduced to the minimum opening. At this time, the flow path of the raw water is, in sequence, the water inlet section 811, the first water inlet branch 383, the first plug 3811, the cleaning filter element 301, the second plug 3812, the first water outlet branch 384, the fifth plug 3821, the reverse osmosis filter element 32, the sixth plug 3822, the second water inlet branch 385, the third plug 3813, the cleaning filter element 301, the fourth plug 3814, the second water outlet branch 386, and the flushing branch 83. The waste water after flushing the reverse osmosis filter element 32 is discharged through the flushing branch 83.

[0068] Furthermore, if Figure 5 As shown, the water supply equipment 1 also includes a first TDS probe 391 and a second TDS probe 392, the first TDS probe 391 is arranged in the first water inlet branch 383, and the second TDS probe 392 is arranged in the second water outlet branch 386. The first TDS probe 391 is used to detect the inlet TDS of the raw water in the first water inlet branch 383, and the second TDS probe 392 is used to detect the outlet TDS of the pure water in the second water outlet branch 386. According to the inlet TDS and outlet TDS detected by the first TDS probe 391 and the second TDS probe 392, it can be known whether the desalination rate of the pure water in the outlet waterway channel meets the standard. Among them, TDS is the abbreviation of Total Dissolved Solids, and its full name in Chinese is "total dissolved solids", also known as the total amount of dissolved solids. TDS refers to the total amount of all solutes in water, including the content of both inorganic and organic matter. TDS mainly reflects the concentration of calcium, magnesium, sodium, potassium and other ions in water and the total amount of dissolved solids in water.

[0069] Understandably, when the first TDS probe 391 and the second TDS probe 392 detect that the outlet water desalination rate is not up to standard, the second solenoid valve 37 is opened, the first solenoid valve 36 is closed, and the water in the second outlet branch 386 flows to the flushing branch 83, and finally flows back to the second water tank 12 or is directly discharged as waste water through the wastewater direct discharge pipe. When the first TDS probe 391 and the second TDS probe 392 detect that the outlet water desalination rate is up to standard, the second solenoid valve 37 is closed, the first solenoid valve 36 is opened, and the water in the second outlet branch 386 flows to the outlet section 812 and is stored in the first water tank 20 for user use.

[0070] For details, please combine Figure 2 and Figure 5As shown, when the composite filter element 31 is installed in the first installation part and the water supply device 1 is producing water, the raw water in the second water tank 12 flows into the first water inlet branch 383 through the water inlet section 811. At this time, the first TDS probe 391 detects the inlet TDS of the raw water. The raw water enters the pre-filter element through the first plug 3811, flows into the first water outlet branch 384 from the second plug 3812 after being roughly filtered by the pre-filter element, and then enters the reverse osmosis filter element 32 through the fifth plug 3821. After being filtered by the reverse osmosis filter element 32, one path of pure water and one path of waste water are divided. The pure water flows into the second water inlet branch 385 from the reverse osmosis outlet through the sixth plug 3822, and then flows into the post-filter element through the first one-way valve 34 and the third plug 3813 for re-filtration. The re-filtered pure water flows into the second water outlet branch 386 through the fourth plug 3814. At this time, the second TDS probe 392 detects the outlet TDS of the pure water. After the outlet water desalination rate reaches the standard, the second solenoid valve 37 is closed, the first solenoid valve 36 is opened, the water in the second outlet branch 386 flows to the outlet section 812, and the water in the outlet section 812 flows and is stored in the first water tank 20. When the first TDS probe 391 and the second TDS probe 392 detect that the outlet water desalination rate does not reach the standard, the second solenoid valve 37 is opened, the first solenoid valve 36 is closed, and the pure water in the second outlet branch 386 flows through the flushing branch 83 and sequentially passes through the second check valve 35 and the second solenoid valve 37 into the second water tank 12, or is directly discharged as waste water through the waste water direct discharge pipe. The waste water filtered by the reverse osmosis filter element 32 is directly discharged from the waste water outlet through the seventh plug 3823 and the waste water branch 82, and then through the waste water valve 821 to the second water tank 12, or is directly discharged as waste water through the waste water direct discharge pipe.

[0071] When the user takes drinking water, the outlet TDS will increase with the increase of water taking time due to the reflux of wastewater. Therefore, it is designed that when the user takes drinking water for a certain time, the wastewater direct discharge program is started, that is, the normal water production state is maintained, the second solenoid valve 37 is opened, the first solenoid valve 36 is closed, and the wastewater in the flushing branch 83 and the wastewater branch 82 is directly discharged through the wastewater direct discharge pipeline, and does not enter the second water tank 12. The outlet TDS can be restored to the initial level in a short time, and the impact on the drinking water flux is small.

[0072] According to an embodiment of the present invention, Figure 5 , Figure 6 and Figure 7 As shown, a method for cleaning a water supply device is also proposed, and the cleaning method comprises the following steps:

[0073] Step S101: Calculating the remaining service life of the composite filter element and the remaining service life of the reverse osmosis filter element;

[0074] Step S102: According to the remaining service life of the composite filter element being less than the first preset service life value, and the remaining service life of the reverse osmosis filter element being greater than the second preset service life value, a core replacement and cleaning reminder message is issued;

[0075] Step S103: replacing the composite filter element with a cleaning filter element according to the core replacement and cleaning prompt information;

[0076] Step S104: flushing the reverse osmosis filter element.

[0077] In step S101, in the water supply equipment proposed in this embodiment, the composite filter element is a PCB filter element (Pre Carbon Block Filter). The full Chinese name of the PCB filter element is a multilayer ceramic substrate filter element, also known as a pre-carbon block filter element. The core filter medium of the PCB filter element is activated carbon. The PCB filter element mainly relies on physical adsorption and chemical reaction to effectively remove residual chlorine, odor, color and organic pollutants in the water. The reverse osmosis filter element is a RO filter element (Reverse Osmosis Filter). The RO filter element uses a reverse osmosis membrane as the core filter medium. Through the separation process of a semi-permeable membrane, most of the dissolved solids, heavy metals, microorganisms, bacteria, viruses, etc. in the raw water are removed.

[0078] Among them, in this embodiment, the service life of the RO filter element is greater than the service life of the PCB filter element. Therefore, when the service life of the composite filter element in the water supply equipment reaches the preset life (that is, the remaining service life of the composite filter element is less than the first preset life value), and the service life of the reverse osmosis filter element has not reached the preset life (that is, the remaining service life of the reverse osmosis filter element is greater than the second preset life value).

[0079] In step S102, issuing a core replacement and cleaning reminder message can serve as a reminder, making it convenient for users to perform core replacement and cleaning operations on the water supply equipment in a timely manner, ensuring that the water supply equipment is always in good working condition. The core replacement and cleaning reminder message can be set in a variety of ways. For example, in some embodiments, a core replacement and cleaning indicator light is set on the water supply equipment, and the core replacement and cleaning reminder message is set to light up the core replacement and cleaning indicator light, using different colors or flashing methods to distinguish different states. For example, a flashing red indicator light indicates that the water supply equipment needs to perform a core replacement and cleaning operation. In other embodiments, the core replacement and cleaning reminder message is set to send out a specific sound signal, such as a beep, voice prompt, etc. For example, the device will issue a voice prompt of "Please perform core replacement and cleaning". In other embodiments, the core replacement and cleaning reminder message is set to display the core replacement and cleaning reminder message on the screen of the water supply device, including text descriptions and possible graphic prompts.

[0080] In step S103, after the user receives the cartridge replacement and cleaning prompt, the user needs to manually replace the composite filter cartridge with a cleaning filter cartridge. After the user completes the replacement of the cleaning filter cartridge, the water supply equipment starts step S104 after receiving the user's cartridge replacement and cleaning instruction, and uses the cleaning filter cartridge to perform multiple rounds of flushing on the reverse osmosis filter cartridge in sequence.

[0081] The water supply equipment also includes a core replacement and cleaning switch, which can be set as an independent physical button and installed on the control panel of the water supply equipment or in a position that is easy to operate. The user can send a core replacement and cleaning instruction by pressing the button. The core replacement and cleaning switch can also be set to use touch sensing technology, and when the user touches a specific area, the core replacement and cleaning program can be triggered.

[0082] In some embodiments, wireless communication technology can also be used, and users can use remote devices such as remote controllers and mobile phone apps to control the core replacement and cleaning switches. For example, users can remotely start the cleaning program of the water supply equipment when they leave home so that they can use clean water when they return home.

[0083] The core replacement cleaning instruction is a signal sent by the user to the water supply equipment through the core replacement cleaning switch to start the cleaning program. The core replacement cleaning instruction can be set as a single operation cleaning switch or a combination of multiple operation cleaning switches to generate a core replacement cleaning start signal sent to the water supply equipment. For example, a single operation includes pressing the core replacement cleaning switch once; a combination of multiple operations includes clicking the core replacement cleaning switch multiple times within a preset time, such as clicking the core replacement cleaning switch twice in 2 seconds, to ensure that the core replacement cleaning instruction sent by the core replacement cleaning switch should be unique, and facilitate the water supply equipment to accurately identify the user's operation to avoid misoperation and interference.

[0084] It should be noted that the first preset life value and the second preset life value are both greater than zero. This setting allows the composite filter element and the reverse osmosis filter element to send out a core replacement and cleaning reminder message before they are completely scrapped, so that the user can find the usage status of the water supply equipment as soon as possible and ensure the water quality of the water supply equipment.

[0085] In step S104, the reverse osmosis filter element is rinsed with a cleaning filter element to remove raw water impurities attached to the reverse osmosis filter element, extend the service life of the reverse osmosis filter element, and solve the problem of raw water impurities clogging the reverse osmosis filter element and slow water production speed due to long-term use. After the reverse osmosis filter element is cleaned, the cleaning filter element is replaced with a new composite filter element, and the cleaned reverse osmosis filter element continues to be used, making full use of the remaining use value of the reverse osmosis filter element, saving resources, and saving the use cost of water supply equipment.

[0086] In some embodiments, Figure 5 , Figure 6 and Figure 8As shown, the method for calculating the remaining service life of the composite filter element includes the following steps:

[0087] Step S201: Obtaining the total service life T1 of the composite filter element;

[0088] Step S202: accumulating the water production time t1 of the water supply equipment;

[0089] Step S203: Calculate the remaining service life of the composite filter element according to T1 minus t1.

[0090] In this embodiment, in step S201, the service life T1 of the composite filter element is one year, and the unit of the service life of the composite filter element converted into hours is 365*24 hours.

[0091] In step S202, the water production time t1 of the water supply equipment is accumulated. The water supply equipment 1 counts time during each water production process. During the process from the beginning to the end of each water production, the timer will increase the corresponding value for each unit time, thereby calculating the operating time of each water production process of the water supply equipment. The timing starts when the water supply equipment is powered on for the first time after the new composite filter element is installed, and the water production time of each water production process is accumulated to obtain the water production time t1 of the water supply equipment.

[0092] In step S203, the remaining service life of the composite filter element is calculated by subtracting t1 from T1. When the remaining service life is less than the first preset service life value, it is determined that the composite filter element has reached the preset service life and needs to be replaced with a new composite filter element.

[0093] In some embodiments, Figure 5 , Figure 6 and Fig. 9 As shown, the method for calculating the remaining service life of the reverse osmosis filter element includes the following steps:

[0094] Step S301: Calculate the theoretical total filtered water volume L1 of the reverse osmosis filter during its service life;

[0095] Step S302: Calculate the real-time cumulative water production p of the reverse osmosis filter element;

[0096] Step S303: according to the real-time cumulative water production amount p being greater than or equal to 1 liter, the actual cumulative water production amount P of the reverse osmosis filter element is increased by 1 liter;

[0097] Step S304: Calculate the remaining service life of the reverse osmosis filter element according to the actual cumulative water production volume P and the theoretical total filtered water volume L1.

[0098] In step S301, the theoretical total filtered water volume of the reverse osmosis filter element is calculated according to the formula L1=(1-(W1-W0)*X*C)*L0. Among them, W1 is the TDS value of the use area, that is, the inlet TDS detection value. W0 is the laboratory TDS value, and the laboratory TDS value is set to 200 mg / L. The laboratory TDS value is also the TDS value of the certified laboratory water quality. L1 is the service life of the water supply equipment in the use area, and is expressed in terms of the theoretical total filtered water volume. L0 is the certified filter element life, where L0 is specifically 18250L (3650L*5 years). X is the water quality coefficient, and X is set to 0.0015 based on previous experimental verification. C is the intelligent flushing coefficient, and C is initially set to 1.00 (C can be revised according to different RO filter element membrane rolling methods / electrically controlled flushing procedures).

[0099] It should be noted that in step S301, by introducing the TDS value (W1) of the area of ​​use, the theoretical total filtered water volume can be accurately calculated according to the differences in water quality in different regions. The water quality in different regions varies. Some regions have high water hardness and large TDS values, while others are relatively good. The personalized calculation method in this embodiment can make the service life assessment of the reverse osmosis filter more accurate, avoiding the premature failure of the filter element in some areas with poor water quality due to the use of a unified standard, or the failure to fully utilize the service life of the filter element in areas with good water quality.

[0100] Using a fixed laboratory TDS value (W0) as a reference helps to establish a relatively stable benchmark. The laboratory TDS value is set to 200 mg / L, which can be used as a generally recognized standard water quality reference, which is convenient for comparison with the water quality in the actual use area, so as to more accurately adjust the calculation of the theoretical total filtered water volume.

[0101] According to the calculation method of the service life of the reverse osmosis filter element proposed in this embodiment, the theoretical total filtered water volume of the reverse osmosis filter element under water quality conditions in different regions can be calculated more accurately, thereby providing users with more accurate information on the remaining service life of the filter element. Users can reasonably arrange the timing of replacing the filter element and cleaning based on this information, avoiding waste caused by premature replacement of the reverse osmosis filter element, and preventing water quality degradation and equipment damage caused by overuse of the reverse osmosis filter element.

[0102] It should also be noted that the TDS value W1 of the use area is obtained by taking the average value of all sample values ​​after collecting TDS sample values ​​for multiple times to obtain the TDS value W1 of the use area. Understandably, a single measurement of TDS value may be affected by various factors, such as the accuracy of the measuring instrument, changes in the measuring environment, and the unevenness of the water sample. By collecting TDS values ​​for multiple times and taking the average value, random errors can be effectively reduced and the accuracy of the measurement results can be improved. For example, collecting water samples at different time points for TDS value measurement may cause large differences in single measurement results due to factors such as fluctuations in water sources, peaks and troughs in water use, etc. These fluctuations can be smoothed by taking the average value to obtain a result that is closer to the true value. In this embodiment, the number of times the TDS sample value is collected is greater than or equal to 8 times.

[0103] In step S302 and step S303, the real-time cumulative water production p of the reverse osmosis filter element is calculated, and the real-time cumulative water production p of the reverse osmosis filter element is obtained by the real-time water supply of the self-priming pump. Specifically, according to the parameters such as the power, efficiency and water density of the self-priming pump, the flow rate of the self-priming pump can be calculated by a theoretical formula, and then the water pumping volume per unit time of the self-priming pump can be calculated. Among them, the water pumped by the self-priming pump is finally delivered to the reverse osmosis filter element, so the real-time cumulative water production p of the reverse osmosis filter element is equal to the real-time water supply of the self-priming pump.

[0104] In detail, the power formula of the self-priming pump is: Power = Flow × Head × Water Density × Gravity Acceleration ÷ Efficiency. The power, head, efficiency and other parameters of the self-priming pump are known data, so the flow rate can be inferred through the formula.

[0105] Among them, the real-time cumulative water production amount p refers to: the water production amount of the reverse osmosis filter element accumulated from 0 to 1 liter. When the real-time cumulative water production amount p is greater than or equal to 1 liter, the actual cumulative water production amount P of the reverse osmosis filter element is added by 1 liter. After the actual cumulative water production amount P is added by 1 liter, the real-time cumulative water production amount p is cleared, and returns to step S302 to re-accumulate the real-time cumulative water production amount p of the reverse osmosis filter element.

[0106] In step S304: the remaining service life of the reverse osmosis filter element is calculated according to the actual cumulative water production amount P and the theoretical total filtered water amount L1, so that the data of the remaining service life can be used to intuitively understand whether the reverse osmosis filter element has remaining use value.

[0107] It can be understood that the remaining service life can be expressed in a variety of ways. For example, in some embodiments, the remaining service life is expressed by the remaining filtered water volume of the reverse osmosis filter element. The remaining filtered water volume is the total amount of water that the reverse osmosis filter element can filter while ensuring that the water quality meets the requirements. Therefore, the remaining service life of the reverse osmosis filter element can be calculated using the formula: Remaining service life = theoretical total filtered water volume L1 - actual water production cumulative volume P.

[0108] In other embodiments, the proportion of the actual accumulated water production P to the theoretical total filtered water volume L1, ie, P / L1, can be calculated by a proportional calculation method, and the remaining service life is equal to the total service life multiplied by (1-P / L1).

[0109] In some embodiments, Figure 5 , Figure 6 and Fig.10 As shown, the steps of calculating the remaining service life of the reverse osmosis filter element according to the actual cumulative water production amount P and the theoretical total filtered water amount L1 include:

[0110] Step S401: Calculate the filtered water volume L2 of the reverse osmosis filter element per 1% of its service life according to the theoretical total filtered water volume L1 / 100;

[0111] Step S402: according to a*L2<P<b*L2, the percentage F of the service life of the reverse osmosis filter element is accumulated by 1%;

[0112] Step S403: Calculate the remaining service life of the reverse osmosis filter element according to 100%-F.

[0113] Wherein, a and b are constants, and 0.8<a≤1, 1<b<1.2.

[0114] In step S401, the amount of filtered water L2 of the reverse osmosis filter element for each 1% of its service life is calculated by dividing the theoretical total amount of filtered water L1 by 100. L2 represents the amount of filtered water corresponding to each 1% of the reverse osmosis filter element in its entire service life. By subdividing the theoretical total amount of filtered water L1 of the reverse osmosis filter element into the amount of filtered water L2 corresponding to each 1% of its service life, the calculation of the service life of the reverse osmosis filter element is more refined, which can more accurately reflect the actual use of the reverse osmosis filter element and avoid errors caused by overly rough estimates.

[0115] In step S402, the cumulative service life percentage F of the reverse osmosis filter element is determined according to the condition a*L2<P<b*L2. Wherein, a and b are constants, and satisfy 0.8<a≤1, 1<b<1.2. When the actual cumulative water production P is between aL2 and bL2, it means that the service life of the filter element has increased by 1%, and the service life percentage F is accumulated by 1%. By introducing constants a and b, the calculation process can adapt to different usage conditions and performance changes of the reverse osmosis filter element. The value range of a and b takes into account the uncertainty and fluctuations in actual use, making the calculation result more reliable. For example, when the reverse osmosis filter element may be affected by factors such as water quality and frequency of use during use, the value range of a and b can accommodate the above changes to a certain extent, so that the calculated remaining service life is more in line with the actual situation.

[0116] In step S403, the remaining service life of the reverse osmosis filter element is obtained by subtracting the service life percentage F from 100%. As the actual water production cumulative amount P increases, when gradually approaching each 1% service life corresponding to the filtered water volume interval, the service life percentage F will be gradually accumulated. In this way, the user can be warned in advance that the service life of the reverse osmosis filter element is about to expire, so that the user has enough time to prepare to replace the reverse osmosis filter element, avoiding the impact on water safety and normal operation of the equipment due to the sudden failure of the reverse osmosis filter element.

[0117] The value of a may be, for example, 0.8, 0.9, 0.95, 0.98, 0.99, 1, etc. The value of b may be, for example, 1.01, 1.02, 1.05, 1.08, 1.1, 1.15, 1.2, etc.

[0118] In some embodiments, Figure 5 , Figure 6 and Fig.11 As shown, the method for calculating the remaining service life of the reverse osmosis filter element also includes the following steps:

[0119] Step S501: Calculate the theoretical total filtered water volume L1 of the service life of the reverse osmosis filter element;

[0120] Step S502: Calculate the real-time cumulative water production p of the reverse osmosis filter element;

[0121] Step S503: according to the real-time cumulative water production amount p being greater than or equal to 1 liter, the actual cumulative water production amount P of the reverse osmosis filter element is increased by 1 liter;

[0122] Step S504: Calculate the remaining service life of the reverse osmosis filter element according to the actual cumulative water production volume P and the theoretical total filtered water volume L1;

[0123] Step S505: Calculate the maximum available time H of the service life of the reverse osmosis filter element according to (L1 / 10)*24;

[0124] Step S506: Calculate the usage time t2 of the reverse osmosis filter element for every 1% of the service life according to the maximum available time H / 100;

[0125] Step S507: Calculate the real-time accumulative power-on time t3 of the reverse osmosis filter element;

[0126] Step S508: according to the fact that the real-time cumulative water production volume p is less than 1 liter and the real-time cumulative power-on time t3 is greater than or equal to 1 hour, the actual cumulative power-on time H2 of the reverse osmosis filter element is accumulated by 1 hour;

[0127] Step S509: according to a*t2<H2<b*t2, the percentage F of the service life of the reverse osmosis filter element is accumulated by 1%;

[0128] Step S510: Calculate the remaining service life of the reverse osmosis filter element according to 100%-F.

[0129] In this embodiment, step S501 is the same as step S301, step S502 is the same as step S302, step S503 is the same as step S303, and step S504 is the same as step S304, which will not be repeated here.

[0130] In step S505, the maximum available time H of the service life of the reverse osmosis filter element is calculated according to the formula (L1 / 10)*24, where the unit of H is hours, 24 refers to 24 hours a day, and 10 refers to the water production of 10L per day of the water supply equipment.

[0131] In step S506, the use time t2 of the reverse osmosis filter element for each 1% of the service life is calculated by dividing the maximum available time H by 100. t2 represents the water production time corresponding to each 1% of the reverse osmosis filter element in its entire service life. By subdividing the maximum available time H of the reverse osmosis filter element into the use time t2 of the reverse osmosis filter element corresponding to each 1% of the service life, the calculation of the service life of the reverse osmosis filter element is more refined, which can more accurately reflect the actual use of the reverse osmosis filter element and avoid errors caused by overly rough estimates.

[0132] In step S507 and step S508, the real-time power-on cumulative time t3 refers to: when the reverse osmosis filter is producing water, the real-time water production cumulative amount p refers to: starting from 0 and accumulating the water production time of the reverse osmosis filter within 1 hour. When the real-time water production cumulative amount p is less than 1 liter, it is determined whether the real-time power-on cumulative time t3 is greater than or equal to 1 hour. When the real-time power-on cumulative time t3 is greater than or equal to 1 hour, the actual power-on cumulative time H2 of the reverse osmosis filter is accumulated by 1 hour.

[0133] After the actual power-on cumulative time H2 is accumulated for 1 hour, the real-time power-on cumulative time t3 is reset, and the process returns to step S502 to recalculate the real-time cumulative water production amount p of the reverse osmosis filter element.

[0134] In step S509, the cumulative service life percentage F of the reverse osmosis filter element is determined according to the condition a*t2<H2<b*t2. Wherein, a and b are constants, and satisfy 0.8<a≤1, 1<b<1.2. When the actual power-on cumulative time H2 is between aL2 and bL2, it means that the service life of the filter element has increased by 1%, and the service life percentage F is accumulated by 1%. By introducing constants a and b, the calculation process can adapt to different usage conditions and performance changes of the reverse osmosis filter element. The value range of a and b takes into account the uncertainty and fluctuations in actual use, making the calculation result more reliable. For example, when the reverse osmosis filter element may be affected by factors such as water quality and frequency of use during use, the value range of a and b can accommodate the above changes to a certain extent, so that the calculated remaining service life is more in line with the actual situation.

[0135] In step S510, the remaining service life of the reverse osmosis filter element is obtained by subtracting the service life percentage F from 100%. As the actual power-on cumulative time H2 increases, when gradually approaching each power-on cumulative time interval corresponding to 1% of the service life, the service life percentage F will be gradually accumulated. In this way, the user can be warned in advance that the service life of the reverse osmosis filter element is about to expire, so that the user has enough time to prepare to replace the reverse osmosis filter element, avoiding the impact on water safety and normal operation of the equipment due to the sudden failure of the reverse osmosis filter element.

[0136] The value of a may be, for example, 0.8, 0.9, 0.95, 0.98, 0.99, 1, etc. The value of b may be, for example, 1.01, 1.02, 1.05, 1.08, 1.1, 1.15, 1.2, etc.

[0137] According to an embodiment of the present invention, Figure 5 , Figure 6 and Fig.12 As shown, a method for calculating the remaining life of a reverse osmosis filter element is also proposed, comprising the following steps:

[0138] Step S601: Power on the water supply equipment to produce water;

[0139] Step S602: Collecting water TDS sample values ​​of the first water inlet branch multiple times;

[0140] Step S603: Calculate the average value of all inlet water TDS sample values ​​to obtain the use area TDS value W1;

[0141] Step S604: Calculate the theoretical total filtered water volume L1 of the reverse osmosis filter element according to the formula L1=(1-(W1-W0)*X*C)*L0;

[0142] Step S605: L1 / 10*24 calculates the maximum available time H of the service life of the reverse osmosis filter element;

[0143] Step S606: Calculate the usage time t2 of the reverse osmosis filter element per 1% of its service life according to the formula H / 100;

[0144] Step S607: Calculate the real-time cumulative water production p of the reverse osmosis filter element and calculate the real-time cumulative power-on time t3 of the reverse osmosis filter element;

[0145] Step S608: Determine whether the real-time water production cumulative volume p is greater than 1 liter, if so, execute step S609, otherwise execute step 612;

[0146] Step S609: adding 1 liter to the actual cumulative water production volume P of the reverse osmosis filter element;

[0147] Step S610: Calculate the filtered water volume L2 of the reverse osmosis filter element per 1% of its service life according to the formula L1 / 100;

[0148] Step S611: according to aL2<P<bL2, the percentage F of the service life of the reverse osmosis filter element is accumulated by 1%, and step 615 is executed;

[0149] Step S612: Determine whether the real-time power-on cumulative time t3 is less than 1 hour, if yes, execute step 607, if no, execute step S613;

[0150] Step S613: adding the actual energized cumulative time H2 of the reverse osmosis filter element to 1 hour;

[0151] Step S614: according to at2<H2<bt2, the percentage F of the service life of the reverse osmosis filter element is accumulated by 1%;

[0152] Step S615: Calculate the remaining service life of the reverse osmosis filter element according to 100%-F.

[0153] In some embodiments, Figure 5 , Figure 6 and Fig.13 As shown, the steps for flushing the reverse osmosis filter include:

[0154] Step S701: Control the water inlet section, the water branch and the wastewater branch to be connected in sequence;

[0155] Step S702: performing a first round of flushing on the reverse osmosis filter element for a first period of time;

[0156] Step S703: Sending a first second water tank water change signal;

[0157] Step S704: replacing the raw water in the second water tank according to the first second water tank water replacement signal;

[0158] Step S705: performing a second round of flushing on the reverse osmosis filter element and continuing for a second period of time.

[0159] The second time period is greater than the first time period.

[0160] In step S701, the water inlet section 811, the water branch and the wastewater branch 82 are controlled to be connected in sequence, and the flow path of the raw water is the water inlet section 811, the first water inlet branch 383, the first plug 3811, the cleaning filter element 301, the second plug 3812, the first water outlet branch 384, the fifth plug 3821, the reverse osmosis filter element 32, the seventh plug 3823, the wastewater passage 387, and the wastewater branch 82. The wastewater after flushing the reverse osmosis filter element 32 is discharged through the wastewater branch 82, so that the reverse osmosis filter element 32 can be cleaned by using the cleaning filter element 301. The cleaning filter element 301 can generate a specific water flow or chemical reaction to remove raw water impurities attached to the reverse osmosis filter element 32, extend the service life of the reverse osmosis filter element 32, and solve the problem of raw water impurities clogging the reverse osmosis filter element 32 and slow water production due to long-term use. After the reverse osmosis filter element 32 is cleaned, the new composite filter element 31 replaces the cleaning filter element 301 and is installed in the first installation part. The cleaned reverse osmosis filter element 32 continues to be used, making full use of the remaining use value of the reverse osmosis filter element 32, saving resources, and saving the use cost of the water supply equipment 1.

[0161] In step S702 to step S705, the cleaning filter element 301 is controlled to flush the reverse osmosis filter element 32 for the first time period, that is, according to the flushing path in step S204, the self-priming pump 310 is controlled to start, and the reverse osmosis filter element 32 is flushed, and the first time period is continued. In the first round of flushing, the self-priming pump 310 is started, the first solenoid valve 36 and the second solenoid valve 37 are closed, and the opening of the waste water valve 821 is adjusted to the maximum value. Specifically, after starting the self-priming pump 310, the self-priming pump 310 drives the water in the water inlet section 811 of the water production main road 81 to move from the second water tank 12 to the first water inlet main road. The raw water in the second water tank 12 is sucked into the water inlet section 811 under the driving action of the self-priming pump 310, and flows into the cleaning filter element 301 through the first water inlet branch 383 and the first plug 3811 in turn. When the raw water passes through the cleaning filter element 301, the cleaning filter element 301 precipitates chemical substances (such as acidic substances and oxidants, etc.) The chemical substance is dissolved in the raw water and flows into the reverse osmosis filter element 32 through the second plug 3812, the first water outlet branch 384 and the fifth plug 3821. The chemical substance reacts with impurities such as scale in the reverse osmosis filter element 32, so that the impurities such as scale are separated from the surface or pores of the reverse osmosis filter element 32 and converted into soluble salts, which are then washed away by the water flow through the seventh plug 3823, the waste water passage 387 and the waste water branch 82 in sequence, and finally flow back to the second water tank 12 through the waste water branch 82. After the first flushing period is continued, the first round of flushing ends.

[0162] It is conceivable that after the first round of flushing, impurities such as scale in the reverse osmosis filter element 32 are dissolved into a soluble salt solution and finally discharged into the second water tank 12. Therefore, after the first flushing period, the concentration of the soluble salt solution in the second water tank 12 gradually increases. Since the water in the second water tank 12 circulates during the flushing process, the concentration of the soluble salt solution of the raw water used to flush the reverse osmosis filter element 32 also gradually increases, which is not conducive to continuing to flush the reverse osmosis filter element 32. Therefore, after the first round of flushing is completed, the raw water in the second water tank 12 needs to be replaced.

[0163] In step S703, after the first round of flushing is completed, the first water change signal for the second water tank 12 is issued to prompt the user to change the water in the second water tank 12. The water change signal can be an electronic signal that triggers the indicator light on the device to flash, emit a sound prompt, or send a notification to the mobile phone, computer and other devices of the relevant personnel through a network connection.

[0164] In step S704, after the user completes the water change operation, the second flushing operation is performed. In this step, the control device 200 can detect whether the water change operation is completed according to the water level change in the second water tank 12. For example, when the water level in the second water tank 12 first drops to the lower limit value of the water level and then rises to the upper limit value of the water level, it is determined that the user has completed the water change operation in the second water tank 12, and the upper limit value of the water level is greater than the lower limit value of the water level.

[0165] In step S705, in the second round of flushing, the self-priming pump 310 is controlled to start, the reverse osmosis filter element 32 is flushed, and the second time period is continued. In the second round of flushing, the self-priming pump 310 is started, the first solenoid valve 36 and the second solenoid valve 37 are closed, and the opening of the wastewater valve 821 is adjusted to the maximum value. Specifically, after starting the self-priming pump 310, the self-priming pump 310 drives the water in the water inlet section 811 of the water production main road 81 to move from the second water tank 12 to the first water inlet main road. The raw water in the second water tank 12 is sucked into the water inlet section 811 under the driving action of the self-priming pump 310, and flows into the cleaning filter element 301 through the first water inlet branch 383 and the first plug 3811 in turn. When the raw water passes through the cleaning filter element 301, the cleaning filter element 301 precipitates chemical substances (such as acidic substances and oxidants, etc.) and dissolves In the raw water, as the raw water flows into the reverse osmosis filter element 32 through the second plug 3812, the first water outlet branch 384 and the fifth plug 3821, the chemical substance reacts chemically with the scale and other impurities in the reverse osmosis filter element 32, so that the scale and other impurities are separated from the surface or pores of the reverse osmosis filter element 32 and converted into soluble salts, which are washed away from the wastewater outlet of the reverse osmosis filter element 32 through the seventh plug 3823, the wastewater passage 387 and the wastewater branch 82, and finally flow back to the second water tank 12 through the wastewater branch 82. After the second flushing period is continued, the second round of flushing ends.

[0166] In some embodiments, the first time period can be set to any value between 5 min and 15 min, for example, 5 min, 8 min, 10 min, 12 min, 13 min, 14 min, 15 min, etc. The second time period is set to any value between 10 min and 20 min, for example, 10 min, 12 min, 14 min, 15 min, 18 min, 19 min, 20 min, etc., and the second time period is greater than the first time period.

[0167] In an exemplary embodiment, the first time period is set to 10 minutes, and the second time period is set to 15 minutes.

[0168] In this embodiment, the first round of flushing is mainly to preliminarily remove some obvious impurities and contaminants on the surface of the reverse osmosis filter element 32. As the flushing proceeds, some stubborn stains and sediments may require longer time and stronger water flow impact to be removed. The second time period is longer than the first time period, and the second round of flushing lasts longer, which can allow the cleaning filter element 301 to have more time to more thoroughly flush the reverse osmosis filter element 32, improve the flushing effect, and ensure that the reverse osmosis filter element 32 is restored to a better filtering performance. For example, some fine particles may not be completely washed away in the first round of flushing, but in the second round of longer flushing, these particles have a greater chance of being washed away because the water flow continues to act for a longer time.

[0169] It should also be noted that after the first round of flushing, the state of the reverse osmosis filter element 32 may change. Some originally blocked pores may be partially opened, but at the same time, new impurities may enter the reverse osmosis filter element 32. The second time period is longer to better adapt to such changes and perform a more targeted flushing based on the state of the reverse osmosis filter element 32 after the first round of flushing.

[0170] In some embodiments, Figure 5 , Figure 6 and Fig.14 As shown, the method for flushing the reverse osmosis filter element includes the following steps:

[0171] Step S801: Control the water inlet section, the water branch and the wastewater branch to be connected in sequence;

[0172] Step S802: performing a first round of flushing on the reverse osmosis filter element for a first period of time;

[0173] Step S803: Sending a first second water tank water change signal;

[0174] Step S804: replacing the raw water in the second water tank according to the first second water tank water replacement signal;

[0175] Step S805: performing a second round of flushing on the reverse osmosis filter element and continuing for a second period of time.

[0176] Step S806: Sending a second water tank water change signal for the second time;

[0177] Step S807: replacing the raw water in the second water tank according to the second water tank water replacement signal;

[0178] Step S808: Control the water inlet section, the water branch and the flushing branch to be connected in sequence, control the wastewater branch and the water outlet section to be disconnected, and perform a third round of flushing on the reverse osmosis filter element for a third period of time.

[0179] In this embodiment, steps S801 to S805 are the same as steps S701 to S705 and are not described again.

[0180] In step S806 and step S807, after the second round of flushing is completed, a second water change signal for the second water tank 12 is issued to prompt the user to change the water for the second water tank 12. The water change signal can be an electronic signal, which triggers the indicator light on the device to flash, emits a sound prompt, or sends a notification to the mobile phone, computer and other devices of the relevant personnel through a network connection. After the user completes the water change operation, the third round of flushing is performed. In this step, the control device 200 can detect whether the water change operation is completed according to the change of the water level in the second water tank 12. For example, when the water level in the second water tank 12 first drops to the lower limit of the water level and then rises to the upper limit of the water level, it is judged that the user has completed the water change operation of the second water tank 12, and the upper limit of the water level is greater than the lower limit of the water level.

[0181] In step S808, in the third round of core replacement and cleaning, the self-priming pump 310 is started, the first solenoid valve 36 is closed, the opening of the waste water valve 821 is adjusted to the minimum value, and the second solenoid valve 37 is opened. Specifically, after starting the self-priming pump 310, the self-priming pump 310 drives the water of the water inlet section 811 of the water production main road 81 to move from the second water tank 12 to the first water inlet main road. The raw water in the second water tank 12 is sucked into the water inlet section 811 under the driving action of the self-priming pump 310, and flows into the cleaning filter element 301 through the first water inlet branch 383 and the first plug 3811 in turn. When the raw water passes through the cleaning filter element 301, the cleaning filter element 301 precipitates chemical substances (such as acidic substances and oxidants, etc.) and dissolves in the raw water, and flows with the raw water through the second plug 3812, The first water outlet branch 384 and the fifth plug 3821 flow into the reverse osmosis filter element 32, and the chemical substance reacts chemically with the scale and other impurities in the reverse osmosis filter element 32, so that the scale and other impurities are separated from the surface or pores of the reverse osmosis filter element 32 and converted into soluble salts, and then flow from the pure water outlet of the reverse osmosis filter element 32 through the sixth plug 3822, the second water inlet branch 385, the third plug 3813, the cleaning filter element 301, the fourth plug 3814, the second water outlet branch 386, the flushing branch 83, and finally flow back to the second water tank 12 through the flushing branch 83. After the third flushing period is continued, the third round of flushing ends. The third period is equal to the second period.

[0182] In this embodiment, the reverse osmosis filter element 32 is rinsed from the wastewater outlet and the pure water outlet of the reverse osmosis filter element 32 through the first, second and third rounds of rinsing, respectively, to ensure that the water flow can reach different parts of the reverse osmosis filter element 32, including some hard-to-reach corners and pores. In this way, impurities attached to the filter element can be removed more comprehensively, and the thoroughness of cleaning can be improved. Water flows in different paths can produce different flushing directions and strengths, forming multi-angle impacts on impurities, thereby being able to more comprehensively remove impurities attached to the reverse osmosis filter element 32 and improving the thoroughness of cleaning.

[0183] In some embodiments, after completing the third round of rinsing, the cleaning method further comprises the following steps:

[0184] Step S901: replacing the cleaned filter element with a new composite filter element;

[0185] Step S902: Control the water inlet section, the water branch, the flushing branch and the wastewater branch to be connected in sequence, control the water outlet section to be disconnected, and flush the composite filter element and the reverse osmosis filter element for a fourth time period.

[0186] In step S901, the cleaning filter element 301 is unplugged from the first plug assembly 381, and then a new composite filter element 31 is inserted to replace the cleaning filter element 301, which is easy to operate.

[0187] In step S902, after the water supply device 1 completes the core replacement and flushing and replaces the new composite filter element 31, it is necessary to perform a self-cleaning operation on the composite filter element 31. Among them, the self-priming pump 310 is started, the first solenoid valve 36 is closed, the opening of the wastewater valve 821 is adjusted to the maximum value, and the second solenoid valve 37 is opened.

[0188] Specifically, after the self-priming pump 310 is started, the self-priming pump 310 drives the water in the water inlet section 811 of the water production main path 81 to move from the second water tank 12 to the first water inlet main path. The raw water in the second water tank 12 is sucked into the water inlet section 811 under the driving action of the self-priming pump 310, and flows into the pre-filter element through the first water inlet branch 383 and the first plug 3811 in sequence. When the raw water passes through the pre-filter element, the raw water washes away the protective liquid and tiny particles, debris such as carbon powder and other impurities in the pre-filter element, and flows with the raw water through the second plug 3812, the first water outlet branch 384 and the fifth plug 3821 to the reverse osmosis filter element 32. The raw water carrying impurities is discharged into the pre-filter element 32. The reverse osmosis filter element 32 is divided into two paths. One path of raw water carries a large amount of impurities and is flushed away through the wastewater outlet of the reverse osmosis filter element 32 via the seventh plug 3823, the wastewater passage 387, and the wastewater branch 82, and finally flows back to the second water tank 12 through the wastewater branch 82. The other path of raw water is filtered by the reverse osmosis filter element 32, and then flows from the pure water outlet of the reverse osmosis filter element 32 through the sixth plug 3822, the second water inlet branch 385, and the third plug 3813 to the post-filter element, and flushes the post-filter element. After flushing away impurities such as carbon powder in the post-filter element, it flows back to the second water tank 12 through the fourth plug 3814, the second water outlet branch 386, and the flushing branch 83.

[0189] In this embodiment, flushing the new composite filter element 31 can effectively remove impurities brought by the composite filter element 31 during the manufacturing and storage process, ensuring that the equipment composite filter element 31 can provide clean and safe drinking water after being put into use.

[0190] In some embodiments, the water level of the second water tank is obtained, and the flushing is stopped and the second water tank water change indication information is issued according to the water level being lower than the preset water level lower limit. When the water level in the second water tank is lower than the water level lower limit, it means that the quality of the raw water in the second water tank is lower than the lower limit of the water quality required for cleaning the filter element. If the reverse osmosis filter element is continued to be cleaned, the cleaning effect will be greatly reduced. Therefore, by monitoring the water level in the second water tank, when the water level is lower than the water level lower limit, the second water tank water change indication information is issued to remind the user to replace the raw water in the second water tank immediately to improve the water quality of the raw water.

[0191] The water supply equipment proposed in the present invention also includes a liquid level detection component, which is arranged in the second water tank and is used to detect the water level data in the second water tank. The liquid level detection component is electrically connected to the control device. The control device obtains the water level data of the second water tank through the liquid level detection component. When the water level data in the second water tank is lower than the preset water level lower limit, the control device issues a second water tank water change indication information.

[0192] Among them, the liquid level detection component includes but is not limited to a pressure sensor device, an ultrasonic detection device, a capacitive liquid level gauge, etc. For example, in some embodiments, a pressure sensor is installed at the bottom of the second water tank, and the water level height is indirectly determined by detecting the pressure of water on the bottom of the water tank. The pressure of water is proportional to the water level height, and the water level data can be accurately calculated by measuring the pressure value. This detection method is suitable for water tanks of various shapes and sizes, and has high accuracy and stability. In other embodiments, the liquid level detection component is a capacitive liquid level gauge, which includes two electrodes, which are respectively installed at the first water level and the second water level position in the second water tank. When the water level changes, the dielectric constant of water will change the capacitance value between the electrodes. The water level height can be determined by measuring the change in capacitance value.

[0193] In this embodiment, the liquid level detection assembly includes a float, a sensor and a reed switch. The float is usually made of a material with a density less than that of water, such as plastic, foam, etc. The shape of the float can be spherical, cylindrical or other shapes suitable for floating in water. The float slides up and down on the reed switch as the water level in the second water tank changes, and the change in the position of the float reflects the height of the water level in the water tank.

[0194] The reed switch is installed in the second water tank and arranged in the vertical direction. The reed switch is made of strong materials, such as stainless steel, aluminum alloy, etc., to ensure stability in the second water tank. The reed switch provides guidance and support for the float, so that the float can slide up and down accurately along the reed switch under the action of buoyancy.

[0195] The sensor is fixed on the reed switch. The sensor includes but is not limited to a photoelectric sensor, a Hall sensor and a capacitive sensor. The sensor is used to detect the position of the float and convert it into corresponding water level data. The sensor has the characteristics of high precision, high reliability and fast response to accurately reflect the change of the water level in the second water tank.

[0196] Among them, the sensor is arranged near the bottom of the second water tank, and the float is arranged above the sensor. When the float drops with the water level in the second water tank to collide with the sensor, the water level information detected by the sensor is the preset water level lower limit.

[0197] In some embodiments, please combine Figure 5 and Figure 6As shown, the water supply equipment 1 also includes a control device 200, which is electrically connected to the self-priming pump 310, the first TDS probe 391, the second TDS probe 392, the wastewater valve 821, the first solenoid valve 36 and the second solenoid valve 37. Specifically, in the operation of the first round of core replacement and cleaning, the control device 200 controls the self-priming pump 310 to start, the first solenoid valve 36 and the second solenoid valve 37 to close, and the opening of the wastewater valve 821 is opened to the maximum value, and lasts for the first time period. In the operation of the second round of core replacement and cleaning, the control device 200 controls the self-priming pump 310 to start, the first solenoid valve 36 and the second solenoid valve 37 to close, and the opening of the wastewater valve 821 to the maximum value, and lasts for the second time period. In the operation of the third round of core replacement and cleaning, the control device 200 controls the self-priming pump 310 to start, the first solenoid valve 36 to close, the second solenoid valve 37 to open, and the opening of the wastewater valve 821 to the minimum value, and lasts for the third time period. After the new composite filter element 31 is replaced, the control device 200 controls the self-priming pump 310 to start, the first solenoid valve 36 to close, the second solenoid valve 37 to open, and the wastewater valve 821 to open to the maximum value, and continues for the fourth time period.

[0198] In this embodiment, the control device 200 includes a memory 2002 and at least one processor 2001, wherein the memory 2002 stores programs or instructions that can be executed on the processor 2001, and when the processor 2001 executes the program or instruction, the steps of the cleaning method of the water supply equipment 1 in this application are implemented.

[0199] According to an embodiment of the present invention, a computer-readable storage medium is also provided, on which computer-readable instructions are stored, and when the computer-readable instructions are executed by one or more processors, the one or more processors execute the cleaning method of the water supply equipment in any embodiment of the present invention. The cleaning method may include but is not limited to at least one of the following steps: calculating the remaining service life of the composite filter element and the remaining service life of the reverse osmosis filter element; issuing a core replacement cleaning prompt message based on the remaining service life of the composite filter element being less than a first preset service life value and the remaining service life of the reverse osmosis filter element being greater than a second preset service life value; replacing the composite filter element with a cleaning filter element based on the core replacement cleaning prompt message; and flushing the reverse osmosis filter element.

[0200] The logic and / or steps represented in the flowchart or otherwise described herein, for example, may be considered as an ordered list of executable instructions for implementing logical functions, and may be embodied in any computer-readable storage medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, apparatus, or device and execute instructions), or in conjunction with such instruction execution system, apparatus, or device. For purposes of this specification, a "computer-readable storage medium" may be any device that can contain, store, communicate, propagate, or transmit a program for use by an instruction execution system, apparatus, or device, or in conjunction with such instruction execution system, apparatus, or device. More specific examples of computer-readable storage media (a non-exhaustive list) include the following: an electrical connection with one or more wirings (electronic devices), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM, Erasable Programmable Read-Only Memory, or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM, Compact Disc Read-Only Memory). In addition, the computer-readable storage medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering, or processing in another suitable manner as necessary, and then stored in a computer memory.

[0201] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiment, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA, Programmable Gate Array), a field programmable gate array (FPGA, Field Programmable Gate Array), etc.

[0202] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for cleaning a water supply device, characterized in that: The water supply equipment comprises a composite filter element, a cleaning filter element and a reverse osmosis filter element, and the cleaning method comprises: Calculating the remaining service life of the composite filter element and the remaining service life of the reverse osmosis filter element; According to the remaining service life of the composite filter element being less than the first preset service life value, and the remaining service life of the reverse osmosis filter element being greater than the second preset service life value, issuing a core replacement and cleaning reminder message; Replacing the composite filter element with the cleaning filter element according to the core replacement and cleaning prompt information; Flushing the reverse osmosis filter element; Among them, the first preset life value is greater than or equal to zero, and the second preset life value is greater than or equal to zero.

2. The method for cleaning water supply equipment according to claim 1, characterized in that: The step of calculating the remaining service life of the composite filter element includes: Obtain the total service life T1 of the composite filter element; Accumulate the water production time t1 of the water supply equipment; The remaining service life of the composite filter element is calculated based on T1 minus t1.

3. The method for cleaning water supply equipment according to claim 1, characterized in that: The step of calculating the remaining service life of the reverse osmosis filter element includes: Calculate the theoretical total filtered water volume L1 of the reverse osmosis filter element during its service life; Calculate the real-time cumulative water production p of the reverse osmosis filter element; According to the real-time cumulative water production amount p being greater than or equal to 1 liter, the actual cumulative water production amount P of the reverse osmosis filter element is increased by 1 liter; The remaining service life of the reverse osmosis filter element is calculated according to the actual accumulated water production amount P and the theoretical total filtered water amount L1.

4. The method for cleaning water supply equipment according to claim 3, characterized in that: The step of calculating the remaining service life of the reverse osmosis filter element according to the actual accumulated water production amount P and the theoretical total filtered water amount L1 includes: Calculate the filtered water volume L2 of the reverse osmosis filter element per 1% of its service life according to the theoretical total filtered water volume L1 / 100; According to a*L2<P<b*L2, the percentage F of the service life of the reverse osmosis filter element is accumulated by 1%; Calculate the remaining service life of the reverse osmosis filter element based on 100%-F; Wherein, a and b are constants, and 0.8<a≤1, 1<b<1.

2.

5. The method for cleaning water supply equipment according to claim 4, characterized in that: The cleaning method further comprises: According to the percentage F of the service life of the reverse osmosis filter element plus 1%, the actual cumulative water production amount P is reset to zero, and the step of calculating the real-time cumulative water production amount p of the reverse osmosis filter element is returned to execute.

6. The method for cleaning water supply equipment according to claim 3, characterized in that: The cleaning method further comprises: Calculate the maximum available time H of the service life of the reverse osmosis filter element according to (L1 / 10)*24; Calculate the usage time t2 of the reverse osmosis filter element for every 1% of the service life according to the maximum available time H / 100; Calculating the real-time energized cumulative time t3 of the reverse osmosis filter element; According to the real-time cumulative water production volume p being less than 1 liter and the real-time cumulative power-on time t3 being greater than or equal to 1 hour, the actual cumulative power-on time H2 of the reverse osmosis filter element is accumulated by 1 hour; According to a*t2<H2<b*t2, the percentage F of the service life of the reverse osmosis filter element is accumulated by 1%; Calculate the remaining service life of the reverse osmosis filter element based on 100%-F; Wherein, a and b are constants, and 0.8<a≤1, 1<b<1.

2.

7. The method for cleaning water supply equipment according to claim 3, characterized in that: The cleaning method further comprises: According to the percentage F of the service life of the reverse osmosis filter element, 1% is accumulated, the actual power-on cumulative time H2 is reset to zero, and the process returns to the step of calculating the real-time power-on cumulative time t3 of the reverse osmosis filter element.

8. The method for cleaning water supply equipment according to claim 1, characterized in that: The water supply equipment also includes a second water tank, a water production main circuit, a wastewater branch circuit, and a flushing branch circuit. The water production main circuit includes an inlet section, a water branch circuit, and a water outlet section that are sequentially connected. The composite filter element includes a pre-filter element and a post-filter element. The pre-filter element, the reverse osmosis filter element, and the post-filter element are sequentially arranged in the water branch circuit. The water inlet of the water inlet section is connected to the water outlet of the second water tank, the water inlet of the wastewater branch circuit is connected to the wastewater outlet of the reverse osmosis filter element, the water inlet of the flushing branch circuit is connected to the pure water outlet of the post-filter element through the water branch circuit, and the water outlet of the wastewater branch circuit and the water outlet of the flushing branch circuit are respectively connected to the second water tank; The step of flushing the reverse osmosis filter element includes: Controlling the water inlet section, the water branch and the wastewater branch to be connected in sequence; Performing a first round of flushing on the reverse osmosis filter element for a first period of time; Send the first signal to change the water in the second water tank.

9. The method for cleaning water supply equipment according to claim 8, characterized in that: The cleaning method further comprises: replacing the raw water in the second water tank according to the first second water tank water replacement signal; Performing a second round of flushing on the reverse osmosis filter element for a second period of time; The second time period is greater than the first time period.

10. The method for cleaning water supply equipment according to claim 9, characterized in that: After the second round of flushing, the cleaning method further comprises: Sending a second signal to change the water in the second water tank; replacing the raw water in the second water tank according to the second second water tank water replacement signal; The water inlet section, the water branch and the flushing branch are controlled to be connected in sequence, the wastewater branch and the water outlet section are controlled to be disconnected, and the reverse osmosis filter element is flushed for a third round for a third period of time.

11. The method for cleaning water supply equipment according to claim 10, characterized in that: After the third round of flushing, the cleaning method further comprises: Replacing the cleaning filter element with a new composite filter element; The water inlet section, the water branch, the flushing branch and the wastewater branch are controlled to be connected in sequence, the water outlet section is controlled to be disconnected, and the composite filter element and the reverse osmosis filter element are flushed for a fourth time period.

12. A water supply device, characterized in that: The water supply equipment comprises a water production main circuit, a wastewater branch circuit, a flushing branch circuit, a cleaning filter element, a composite filter element, a reverse osmosis filter element and a control device. The water production main circuit comprises a water inlet section, a water branch circuit and a water outlet section which are sequentially connected. The composite filter element comprises a pre-filter element and a post-filter element. The pre-filter element, the reverse osmosis filter element and the post-filter element are sequentially arranged in the water branch circuit. The cleaning filter element can replace the composite filter element to be arranged in the water branch circuit. The water inlet of the wastewater branch circuit is connected to the wastewater outlet of the reverse osmosis filter element. The water inlet of the flushing branch circuit is connected to the pure water outlet of the post-filter element through the water branch circuit. The control device includes a memory and at least one processor, wherein the memory stores a computer program that can be run on the processor, and when the computer program is executed by the processor, the cleaning method of the water supply equipment according to any one of claims 1 to 11 is implemented.

13. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the cleaning method of the water supply equipment according to any one of claims 1 to 11 is implemented.

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