Water purification system and water production control method thereof

Abstract

The present invention relates to the field of water purification technology, and discloses a water purification system and a water purification control method thereof. The water purification system includes: a flushing pipeline, which includes a main pipeline, a first branch pipeline and a second branch pipeline. One end of the main pipeline is connected to a hot water generating device, the first branch pipeline and the second branch pipeline are respectively connected to the main pipeline, and one end of the first branch pipeline is connected to the water inlet or outlet of the pre-carbon filter element, and one end of the second branch pipeline is connected to the water inlet or outlet of the post-carbon filter element; a control valve group, which is connected to the water supply pipeline and the flushing pipeline, and the control valve group switches to control the flow of the water supply pipeline or the flushing pipeline. When the flushing pipeline is in circulation, the hot water generated by the hot water generating device or tap water or the normal temperature water in the pure water cylinder simultaneously flushes the post-carbon filter element and the pre-carbon filter element. By splitting the hot water flowing out of the hot water generating device into two parts and flowing to the post-carbon filter element and the pre-carbon filter element respectively, the flushing and regeneration of the activated carbon filter element are realized.

Description

Technical Field

[0001] The present invention relates to the technical field of water purification systems, and particularly to a water purification system and a water production control method thereof. Background Art

[0002] During the process of tap water transportation in the pipe network, it is inevitable to have pollution such as rust, sediment, organic matter, and microorganisms. With the increasing attention of people to water quality safety, water purifiers with purification functions have gradually been accepted by the market. The water purification system of a water purifier usually includes a pretreatment filter element, a precision filter element, and a post-treatment filter element. Among them, the pretreatment filter element is used to remove organic matter, colloid, heavy metals, and sediment particles, etc.; the precision filter element has extremely high precision, such as a reverse osmosis membrane filter element, which is the core treatment filter element of the water purification system; the post-treatment filter element is used to remove trace elements, adjust the pH, and improve the drinking taste, etc.

[0003] Activated carbon filter elements are an indispensable and important component in the post-treatment filter elements of water purifiers. In related prior arts, some methods such as improving the carbon material, manufacturing process, and increasing the carbon dosage are adopted to extend the service life of the activated carbon filter element and reduce the replacement frequency. However, the activated carbon filter element still has failure points, which affects its service life and requires frequent replacement of the activated carbon filter element. Summary of the Invention

[0004] In view of this, the present invention provides a water purification system to solve the problems of short service life and frequent replacement of the activated carbon filter element used in the purification device in the prior art.

[0005] On the one hand, the present invention provides a water purification system, including: a water production pipeline, on which a pre-activated carbon filter element, a post-activated carbon filter element, and a pure water cylinder are connected in series in sequence; a hot water generation device suitable for selectively heating the pure water in the pure water cylinder; a flushing pipeline including a main pipeline, a first branch pipeline, and a second branch pipeline. One end of the main pipeline is connected to the hot water generation device, the first branch pipeline and the second branch pipeline are respectively connected to the main pipeline, and one end of the first branch pipeline is connected to the water inlet or outlet of the pre-activated carbon filter element, and one end of the second branch pipeline is connected to the water inlet or outlet of the post-activated carbon filter element; a control valve group connected to the water production pipeline and the flushing pipeline, the control valve group switches to control the water production pipeline to flow or control the flushing pipeline to flow, and when the flushing pipeline flows, the hot water generated by the hot water generation device or tap water or the normal temperature water in the pure water cylinder or synchronously flushes the post-activated carbon filter element and the pre-activated carbon filter element; wherein, the water inlet and the water outlet are referenced with respect to the flow direction of the water in the water production pipeline.

[0006] The beneficial effects are as follows: The hot water for disinfection and regeneration shares a heating module with the purified water outlet. The post-carbon filter element and the pre-carbon filter element are regenerated in parallel. The water flow direction in the regeneration pipeline is opposite to that in the normal water production pipeline. The hot water flowing out of the hot water generating device is split into two parts, which respectively flow to the post-carbon filter element and the pre-carbon filter element, realizing the reverse flushing regeneration of the activated carbon filter element. While the reverse flushing pipeline realizes effective regeneration, it can dredge the structure of the carbon filter element through the reverse flushing force and take away some impurities.

[0007] In an optional embodiment, the control valve group includes: a first switching valve, which is arranged on the water production pipeline between the water outlet of the post-carbon filter element and the water inlet of the pure water cylinder. The first switching valve is adapted to cut off or connect the waterway between the water outlet of the post-carbon filter element and the water inlet of the pure water cylinder; a second switching valve, which is arranged on the water production pipeline for supplying water to the water inlet of the pre-carbon filter element and the water inlet of the post-carbon filter element to switch the waterway between the first branch pipeline and the corresponding water production pipeline; or to switch the waterway between the second branch pipeline and the corresponding water production pipeline.

[0008] The beneficial effects are as follows: By switching between the water production pipeline and the flushing pipeline through the first switching valve and the second switching valve, the structure is simple and reliable.

[0009] In an optional embodiment, the water outlet end of the main pipeline is connected to the first switching valve. The water inlet ends of the first branch pipeline and the second branch pipeline are respectively connected to the upstream of the water production pipeline of the first switching valve. The water outlet end of the first branch pipeline is connected to the second switching valve; or the water inlet ends of the first branch pipeline and the second branch pipeline are respectively connected to the water outlet end of the main pipeline, and the water outlet end of the second branch pipeline is connected to the second switching valve.

[0010] In an optional embodiment, both the first switching valve and the second switching valve are two-way valves. The two-way valve has three valve ports. Two valve ports of the two-way valve are respectively connected to the water production pipeline to connect the corresponding water production pipeline when closed. Among them, when the second switching valve is connected to the first branch pipeline, the third valve port of the second switching valve is connected to the first branch pipeline to connect the first branch pipeline when the second switching valve is opened; when the second switching valve is connected to the second branch pipeline, the third valve port of the second switching valve is connected to the second branch pipeline to connect the second branch pipeline when the second switching valve is opened.

[0011] In an optional embodiment, the water purification system further includes a waste water outlet pipeline, which is connected to the water inlet or outlet of the pre-carbon filter element and the water inlet or outlet of the post-carbon filter element.

[0012] In an alternative embodiment, the water purification system further includes: a pre-treatment filter element, which is connected in series to the water production pipeline and is located upstream of the pre-carbon filter element; a non-high-temperature-resistant filter element, which is connected in series to the water production pipeline and is located downstream of the pre-carbon filter element and upstream of the post-carbon filter element; wherein, the water production pipeline includes a first water path, a second water path and a third water path, the first water path connects the water outlet of the pre-treatment filter element and the water inlet of the pre-carbon filter element, the second water path connects the water outlet of the pre-carbon filter element and the water inlet of the non-high-temperature-resistant filter element, the third water path connects the water outlet of the non-high-temperature-resistant filter element and the water inlet of the post-carbon filter element, and the control valve group further includes a water inlet valve. When the second switching valve is provided in the second water path or the third water path, one of the water inlet valves is provided in each of the two of the three water paths.

[0013] On the other hand, the present invention also provides a water production control method for a water purification system, including: controlling the water production pipeline to flow through by a control valve group for water production; after the water production is completed, controlling the flushing pipeline to flow through by the control valve group, so that the hot water generated by the hot water generating device simultaneously enters the post-carbon filter element and the pre-carbon filter element for hot water flushing; after the hot water flushing is completed, controlling the normal temperature water or tap water in the pure water cylinder to simultaneously enter the post-carbon filter element and the pre-carbon filter element for cooling.

[0014] The beneficial effects are as follows: the hot water for disinfection and regeneration shares a heating module with the drinking water outlet. The regeneration of the post-carbon filter element and the pre-carbon filter element adopts a parallel form. The water flow direction of the regeneration pipeline is opposite to that of the normal water production pipeline. The hot water flowing out of the hot water generating device is divided into two parts and flows to the post-carbon filter element and the pre-carbon filter element respectively, realizing the reverse flushing regeneration of the activated carbon filter element. While the reverse flushing pipeline realizes effective regeneration, it can dredge the structure of the carbon filter element through the reverse flushing force and take away some impurities.

[0015] In an alternative embodiment, after the water production is completed, the control valve group controls the circulation of the flushing pipeline, so that the hot water generated by the hot water generation device simultaneously enters the post-carbon filter element and the pre-carbon filter element for hot water flushing. Specifically, it includes: controlling the first switching valve of the control valve group so that the hot water generated by the hot water generation device simultaneously enters the first pipeline and the second pipeline; the hot water enters the water outlet of the post-carbon filter element through the second pipeline for reverse flushing, and controlling the second switching valve of the control valve group so that the hot water simultaneously entering the first pipeline enters the water outlet of the pre-carbon filter element for reverse flushing; or controlling the first switching valve of the control valve group to cut off the water production pipeline connected to the water inlet of the pure water cylinder; controlling the hot water generated by the hot water generation device to enter the main pipeline of the flushing pipeline, so that the hot water enters the water inlet of the pre-carbon filter element through the first pipeline for forward flushing, and controlling the second switching valve of the control valve group so that the hot water simultaneously enters the water inlet of the post-carbon filter element for forward flushing.

[0016] In an alternative embodiment, after the hot water flushing is completed, the control valve group controls the normal temperature water or tap water in the pure water cylinder to simultaneously enter the post-carbon filter element and the pre-carbon filter element for cooling. Specifically, it includes: controlling the first switching valve of the control valve group so that the pure water in the pure water cylinder simultaneously enters the first pipeline and the second pipeline; the pure water enters the water outlet of the post-carbon filter element through the second pipeline for reverse flushing, and controlling the second switching valve of the control valve group so that the pure water simultaneously entering the first pipeline enters the water outlet of the pre-carbon filter element for reverse flushing; or controlling the tap water to enter the water inlets of the pre-carbon filter element and the first pipeline simultaneously through the first water inlet valve, so that the tap water enters the second pipeline through the first pipeline and enters the water inlet of the post-carbon filter element through the second switching valve for forward flushing.

[0017] In an alternative embodiment, at least control the first switching valve and the second switching valve to be closed so that the water production pipeline circulates; or at least control the first switching valve and the second switching valve to be opened so that the flushing pipeline circulates.

[0018] In an alternative embodiment, the control valve group is closed so that the water production pipeline circulates; or the control valve group is opened so that the flushing pipeline circulates.

[0019] The beneficial effect is that it is easy to achieve the switching between the water production pipeline and the flushing pipeline, or the switching between the hot water flushing pipeline and the normal temperature flushing pipeline by opening or closing the control valve group.

[0020] In an alternative embodiment, the hot water flowing through the flushing pipeline flushes or soaks the post-carbon filter element and the pre-carbon filter element with running water.

[0021] The beneficial effect is that the regeneration of the post-carbon filter element and the pre-carbon filter element is achieved by flushing with running water or soaking for a preset time at rest, and the regeneration of the activated carbon can be adjusted according to specific detection parameters, which is more flexible.

[0022] In an alternative embodiment, the water temperature of the hot water is greater than the ambient normal temperature and less than the boiling point temperature of water, which can not only complete the regeneration of the activated carbon but also will not damage the activated carbon.

[0023] In an alternative embodiment, the control valve group is alternately opened or closed, and can cooperate with the normal temperature cooling mode to alternately regenerate and cool to obtain a better regeneration effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 It is the working principle diagram of a water purification system according to an embodiment of the present invention;

[0026] Figure 2 It is the working principle diagram of another water purification system according to an embodiment of the present invention;

[0027] Figure 3 It is the working principle diagram of the water production process of a water purification system according to an embodiment of the present invention;

[0028] Figure 4 It is the working principle diagram of the regeneration flushing process of a water purification system according to an embodiment of the present invention;

[0029] [[ID=३३]] Figure 5 It is the working principle diagram of the cooling flushing process of a water purification system according to an embodiment of the present invention;

[0030] Figure 6 It is the working principle diagram of the water production process of yet another water purification system according to an embodiment of the present invention;

[0031] Figure 7 It is the working principle diagram of the regeneration flushing process of yet another water purification system according to an embodiment of the present invention;

[0032] Figure 8Schematic diagram of the cooling and flushing process of another water purification system according to an embodiment of the present invention;

[0033] Figure 9 Flowchart of a water production control method for a water purification system according to an embodiment of the present invention.

[0034] Description of reference numerals:

[0035] 100, water purification system;

[0036] 110, pre-carbon filter element;

[0037] 120, post-carbon filter element;

[0038] 130, pure water cylinder;

[0039] 140, hot water generating device;

[0040] 150, control valve group;

[0041] 151, first switching valve; 152, second switching valve; 153, first inlet valve; 154, second inlet valve; 155, first outlet valve; 156, second outlet valve;

[0042] 1501, first valve port; 1502, second valve port; 1503, third valve port;

[0043] 170, non-high-temperature resistant filter element;

[0044] 160, pretreatment filter element;

[0045] 180, booster pump;

[0046] 191, main pipeline; 192, first branch pipeline; 193, second branch pipeline. Detailed implementation manners

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0048] The water purification system of a water purifier generally includes a pretreatment filter element, a precision filter element, and a post-treatment filter element. The pretreatment filter element pre-treats the incoming tap water. Using activated carbon in the pretreatment filter element can effectively remove oxidizing substances such as residual chlorine that can damage the precision RO filter element.

[0049] The process of activated carbon adsorbing pollutants mainly includes physical adsorption and chemical adsorption. Physical adsorption is the main adsorption process that occurs in activated carbon. By changing conditions, the adsorption equilibrium can be broken, and the adsorbate can be desorbed. The chemical adsorption process is irreversible. Essentially, it is the formation of a stable complex between the functional groups on the surface of activated carbon and the pollutant molecules. In the specific process of activated carbon adsorbing pollutants, physical adsorption plays a dominant role first. When physical adsorption approaches saturation, chemical adsorption intervenes, and it directly fails completely.

[0050] Regarding the above characteristics of activated carbon adsorption, if a way can be found to break the balance between activated carbon and the adsorbate, make physical adsorption proceed in the reverse direction, and at the same time slow down the reaction process of chemical adsorption, then the activated carbon can be regenerated, its adsorption capacity can be restored, and the purpose of extending the service life of activated carbon can be achieved.

[0051] The methods for extending the life of carbon filters through regeneration are mainly achieved by physical high temperature, steam or vibration, and chemical reagents. For example, the regeneration of activated carbon fibers can be achieved by high-temperature steam. However, this method is applicable to large-scale purification treatment devices in the petrochemical and environmental protection industries, with high process implementation requirements and is not suitable for household water purifiers. The adsorption capacity of activated carbon can be restored by dredging the gaps in the activated carbon, and the self-regeneration process can be completed. However, the implementation device is complex, and additional flocculants need to be added, which cannot guarantee the safety of the use process and drinking water. The regeneration of the filter element can also be achieved by soaking in chlorine dioxide and then high-temperature steam. However, introducing the chemical substance chlorine dioxide cannot guarantee the safety of water quality. The regeneration of activated carbon can also be achieved by electrochemical methods. Under the electrolytic state, the pollutants adsorbed on the activated carbon are decomposed and reduced and then desorbed. However, the precipitation of metal substances in the solution cannot guarantee the safety of drinking water and increases the power consumption.

[0052] In addition, small volume is the main current development trend in the market, and low cost helps to enhance the competitiveness of products. Through the above analysis, it is necessary to find a more effective general technology for the life of carbon filters. This application aims to develop a technology that can in-situ improve the life of carbon filters to solve the problems of short carbon filter life and frequent filter element replacement, and at the same time meet the requirements of energy conservation and environmental protection and enhance the competitiveness of products.

[0053] The following will be combined with Figures 1 to 9 , to describe the embodiments of the present invention.

[0054] As Figure 1 and Figure 2As shown, according to an embodiment of the present invention, on the one hand, a water purification system 100 is provided. The water purification system 100 includes a water production pipeline, a flushing pipeline, a control valve group 150, and a heating device. A pre-carbon filter element 110, a post-carbon filter element 120, and a pure water cylinder are sequentially connected in series on the water production pipeline. The hot water generation device is adapted to selectively heat the pure water in the pure water cylinder 130; the flushing pipeline includes a main pipeline 191, a first branch pipeline 192, and a second branch pipeline 193. One end of the main pipeline 191 is connected to the hot water generation device 140. The first branch pipeline 192 and the second branch pipeline 193 are respectively connected to the main pipeline 191, and one end of the first branch pipeline 192 is connected to the water inlet or outlet of the pre-carbon filter element 110, and one end of the second branch pipeline 193 is connected to the water inlet or outlet of the post-carbon filter element 120; the control valve group 150 is connected to the water production pipeline and the flushing pipeline. The control valve group 150 switches to control the flow of the water production pipeline or controls the flow of the flushing pipeline. The flow of the flushing pipeline enables the hot water of the hot water generation device 140 or the normal temperature water or tap water of the pure water cylinder 130 to flush the post-carbon filter element 120 and the pre-carbon filter element 110 synchronously; wherein, the water inlet and outlet are referenced based on the flow direction of the water in the water production pipeline.

[0055] Wherein, the flow direction of the water during the water production process is positive.

[0056] The above-mentioned water purification system 100 can be a water purifier. The flushing pipeline can be connected in parallel to the water production pipeline, and the flushing pipeline is used to flush the pre-carbon filter element 110 and the post-carbon filter element 120. The pure water cylinder 130 is a pure water storage part, and there can be various embodiments. For example, the pure water cylinder 130 is in the form of a pure water tank in a tabletop water dispenser, etc., and an external driving pump is required for water intake or regeneration; or in the pressure tank mode in a commercial water dispenser, etc., then an external driving pump is not required, a certain volume of purified water can be stored, and water intake or regeneration can be provided through pressure driving. The pure water storage part in this technical solution is embodied in the form of a pure water tank.

[0057] The temperature of the hot water can break the balance between the carbon and the pollutant adsorbate, so that the pollutants are desorbed, so that the activated carbon can recover part of its adsorption capacity and achieve regeneration. Specifically, the temperature is between the ambient temperature and the boiling point temperature of water, so that the hot water at this temperature not only has the effect of flushing, but also is safe and simple.

[0058] Specifically, the hot water generation device includes: a hot water tank, having a pure water inlet and a hot water outlet. The pure water inlet is connected to the outlet of the pure water cylinder, and the hot water outlet is connected to the flushing pipeline; or a heating device, adapted to heat the pure water cylinder so that the hot water enters the flushing pipeline from the outlet of the pure water cylinder.

[0059] The hot water generating device 140 includes a heating part, and the heating part includes a heating device and a temperature regulating device. The heating device is mostly a stainless steel heating pipe, an electric heating wire, etc., which can quickly heat the purified water in the pure water cylinder 130 to a specified temperature by generating heat. The temperature regulating device is connected to the pure water storage part and the heating device, and can control the water intake temperature by means of heat exchange or mixing water, etc. The power of the above heating device is controlled by the control module according to the detected relevant sensing parameters.

[0060] Among them, during the normal water production process, the water enters the water inlet of the filter element in the forward direction, and the water flows out of the water outlet of the filter element in the forward direction. When the water enters the filter element from the water outlet of the filter element, it is a reverse entry, and when the water flows out of the water inlet of the filter element, it is a reverse flow.

[0061] Continue to combine Figure 2 As shown, the solid black arrow indicates the flow direction of the water flowing along the water production pipeline, the hollow arrow indicates the flow direction of the hot water along the flushing pipeline, and the other open arrow indicates the flow direction of the cooling water along the flushing pipeline.

[0062] The flushing pipeline can complete reverse flushing, so that part of the water production pipeline exists as a part of the flushing pipeline. That is, the water production pipeline between the water outlet of the post-carbon filter element 120 and the water inlet of the pure water cylinder 130 can be used as a part of the flushing pipeline, so that the purified water stored in the pure water cylinder 130 can enter the flushing pipeline as the cooling water after hot water flushing. It can be understood that the main pipeline 191 is arranged in parallel with a part of the water production pipeline connected to the pure water cylinder 130.

[0063] The above-mentioned first pipeline 192 and second pipeline 193 are respectively arranged in parallel with the water production pipeline, and the control valve group 150 is used to control the flow of the normal water production pipeline or the flow of the hot water flushing pipeline or the flow of the cooling water flushing pipeline.

[0064] When the normal water production is completed, the control valve group 150 controls the water production pipeline to close, and the pure water cylinder 130 is heated by the heating device, so that the water in the pure water cylinder 130 becomes hot water. The hot water enters the main pipeline 191, and the control valve group 150 controls the hot water to enter the first pipeline 192 and the second pipeline 193 respectively and simultaneously from the main pipeline 191, so that the hot water enters the pre-carbon filter element 110 and the post-carbon filter element 120 synchronously. The contaminants on the activated carbon filter element can be effectively stripped and removed in the flowing water, so that the pre-carbon filter element 110 and the post-carbon filter element 120 can be effectively regenerated synchronously.

[0065] When the hot water finishes regenerating the pre-carbon filter element 110 and the post-carbon filter element 120, the control valve group 150 can switch the flushing pipeline to the pure water cylinder 130, so that the pure water in the pure water cylinder 130 enters the main pipeline 191 and then synchronously enters the first branch pipeline 192 and the second branch pipeline 193, so that the pure water synchronously enters the pre-carbon filter element 110 and the post-carbon filter element 120 for cooling, so as not to affect the subsequent normal water production.

[0066] Further, continue to combine Figure 1 and Figure 2 As shown, the control valve group 150 includes: a first switching valve 151 and a second switching valve 152. The first switching valve 151 is arranged on the water production pipeline between the water outlet of the post-carbon filter element 120 and the water inlet of the pure water cylinder 130. The first switching valve 151 is adapted to cut off or connect the water path between the water outlet of the post-carbon filter element 120 and the water inlet of the pure water cylinder 130; the second switching valve 152 is arranged on the water production pipeline for supplying water to the water inlet of the pre-carbon filter element 110 and the water inlet of the post-carbon filter element 120, so as to switch the water path between the first branch pipeline 192 and the corresponding water production pipeline; or switch the water path between the second branch pipeline 193 and the corresponding water production pipeline.

[0067] The above-mentioned main pipeline 191 can be selectively connected to the first branch pipeline 192 and the second branch pipeline 193 through the first switching valve 151. Among them, the first switching valve 151 can connect the water path between the water outlet of the post-carbon filter element 120 and the water inlet of the pure water cylinder 130 on the water production pipeline to enable normal water production. Or, the first switching valve 151 can cut off the water path between the water outlet of the post-carbon filter element 120 and the water inlet of the pure water cylinder 130 on the water production pipeline to enable the flushing pipeline to flow through.

[0068] Similarly, the second switching valve 152 is also arranged on the water production pipeline. The second switching valve 152 can be controlled to complete normal water production, or the second switching valve 152 can be controlled to switch to the first branch pipeline 192 or the second branch pipeline 193, so that the flushing pipeline can flow through.

[0069] It can also be understood that on the water production pipeline, the first switching valve 151 is arranged downstream of the water outlet of the post-carbon filter element 120, and the second switching valve 152 is arranged upstream of the water inlet of the post-carbon filter element 120, so that the first switching valve 151 and the second switching valve 152 can be switched between the water production pipeline and the flushing pipeline.

[0070] More specifically, both the first switching valve 151 and the second switching valve 152 are two-way valves. A two-way valve has three valve ports. Two of the valve ports of the two-way valve are respectively connected to the water production pipeline, and the other valve port of the two-way valve is connected to the flushing pipeline. The two-way valve has three valve ports. Two of the valve ports of the two-way valve are respectively connected to the water production pipeline to connect the corresponding water production pipeline when closed and to connect the flushing pipeline when closed. Among them, when the second switching valve 152 is connected to the first branch pipeline 192, the third valve port of the second switching valve 152 is connected to the first branch pipeline 192 to connect the first branch pipeline 192 when the second switching valve 152 is opened; when the second switching valve 152 is connected to the second branch pipeline 193, the third valve port of the second switching valve 152 is connected to the second branch pipeline 193 to connect the second branch pipeline 193 when the second switching valve 152 is opened.

[0071] Among them, for the convenience of description, as Figure 3 shown, the three valve ports of the two-way valve are respectively named the first valve port 1501, the second valve port 1502 and the third valve port 1503. The first valve port 1501 and the third valve port 1503 are respectively connected to the water production pipeline. The first valve port 1501 is located downstream of the water production pipeline, and the third valve port 1503 is located upstream of the water production pipeline. The second valve port 1502 of the two-way valve is connected to the flushing pipeline. It can be understood that when the two-way valve is closed, the first valve port 1501 communicates with the third valve port 1503, and the water production pipeline is connected. When the two-way valve is opened, the first valve port 1501 communicates with the second valve port 1502, and the connection is switched to the flushing pipeline.

[0072] Specifically, the third valve port 1503 of the second switching valve 152 is connected to the first branch pipeline 192 or the second branch pipeline 193, and the third valve port 1503 of the first switching valve 151 is connected to the main pipeline 191.

[0073] When both the first switching valve 151 and the second switching valve 152 are switched to the water production pipeline, normal water production can be achieved. When both the first switching valve 151 and the second switching valve 152 are switched to the flushing pipeline, the post-carbon filter element 120 and the pre-carbon filter element 110 can be flushed synchronously to realize the regeneration of the activated carbon.

[0074] Of course, the above-mentioned first switching valve 151 and second switching valve 152 can also be replaced by two inlet valves, and the valve components are used to control the correct pipeline switching.

[0075] In another embodiment, the water outlet end of the main pipeline 191 is connected to the first switching valve 151, the first

[0076] branch pipe

[0077] The water inlet end of the pipeline and the water inlet end of the second branch pipeline 193 are respectively connected to the upstream of the water supply pipeline of the first switching valve 151, and the water outlet end of the first branch pipeline 192 is connected to the second switching valve 152; or the water inlet end of the first branch pipeline 192 and the water inlet end of the second branch pipeline 193 are respectively connected to the water outlet end of the main pipeline 191, and the water outlet end of the second branch pipeline 193 is connected to the second switching valve 152.

[0078] Wherein, when the water outlet end of the main pipeline 191 is connected to the second valve port 1502 of the first switching valve 151, a water path is formed and connected between the main pipeline 191 and the inlet port connecting the first switching valve 151 and the pure water cylinder 130, and the switching between the main pipeline 191 and this water path is realized through the first switching valve 151, so that hot water can enter the first valve port 1501 of the first switching valve 151 through the second valve port 1502 of the first switching valve 151, and thus can enter the first branch pipeline 192 and the second branch pipeline 193 respectively. The second branch pipeline 193 is the water supply pipeline between the water outlet of the post-carbon filter element 120 and the first valve port 1501 of the first switching valve 151, that is, the second branch pipeline 193 coincides with this part of the water supply pipeline, so that hot water can enter the post-carbon filter element 120 through the second branch pipeline 193 for reverse flushing. And the water outlet end of the first branch pipeline 192 is connected to the second switching valve 152, and the second switching valve 152 switches the water path, so that the hot water entering the first branch pipeline 192 reversely enters the water outlet of the pre-carbon filter element 110, realizing the reverse flushing of the pre-carbon filter element 110.

[0079] During the cooling process, the water path is switched through the first switching valve 151, so that the purified water in the pure water cylinder 130 enters the first branch pipeline 192 and the second branch pipeline 193 through the first switching valve 151, which is the same as the path of hot water flushing, realizing the synchronous cooling of the pre-carbon filter element 110 and the post-carbon filter element 120, which will not be elaborated here.

[0080] Wherein, when the water inlet end of the first branch pipeline 192 and the water inlet end of the second branch pipeline 193 are respectively connected to the water outlet end of the main pipeline 191, that is, the water outlet end of the main pipeline 191 may not be connected to the first switching valve 151, and the hot water directly enters the water inlet of the pre-carbon filter element 110 through the first branch pipeline 192, which can realize the forward flushing of the pre-carbon filter element 110, and the hot water entering the second branch pipeline 193 enters the water inlet of the post-carbon filter element 120 through the second switching valve 152, which can realize the forward flushing of the post-carbon filter element 120.

[0081] During the cooling process, since the first switching valve 151 is not connected to the main pipeline 191, it is impossible to synchronously clean the pre-carbon filter element 110 and the post-carbon filter element 120 with the pure water in the pure water cylinder 130. By controlling the first switching valve 151, the water path between the water outlet of the post-carbon filter element 120 and the water inlet of the pure water cylinder 130 is cut off, and the pre-carbon filter element 110 and the post-carbon filter element 120 can be synchronously cooled and flushed with tap water. Specifically, tap water directly enters the water inlet of the pre-carbon filter element for forward flushing, and tap water enters the first branch pipeline 192 connected to the water production pipeline, then enters the second branch pipeline 193. By controlling the second switching valve 152, tap water synchronously enters the water inlet of the post-carbon filter element 120 for normal flushing.

[0082] It can be understood that hot water or pure water enters the post-carbon filter element 120 from the water outlet of the post-carbon filter element 120, so that the post-carbon filter element 120 can be reversely flushed. The contaminants of the post-carbon filter element 120 can be effectively stripped and removed in the flowing water, realizing the effective regeneration of the post-carbon filter element 120. Then, the wastewater can be discharged from the water inlet of the post-carbon filter element 120.

[0083] Similarly, hot water or pure water can enter the pre-carbon filter element 110 from the water outlet of the pre-carbon filter element 110, so that the pre-carbon filter element 110 can be reversely flushed. The contaminants of the pre-carbon filter element 110 can be effectively stripped and removed in the flowing water, realizing the effective regeneration of the pre-carbon filter element 110.

[0084] Reverse flushing of the post-carbon filter element 120 and the pre-carbon filter element 110 is more conducive to the stripping of contaminants.

[0085] Furthermore, the water purification system 100 further includes a wastewater outlet pipeline, which is connected to the water inlet or water outlet of the pre-carbon filter element 110 and the water inlet or water outlet of the post-carbon filter element 120.

[0086] Among them, after the above-mentioned pre-carbon filter element 110 is flushed, the wastewater needs to be discharged. Since the water production pipeline is in a closed state during the flushing stage of the pre-carbon filter element 110, the wastewater outlet of the pre-carbon filter element 110 can be the same as the water outlet or water inlet of the pre-carbon filter element 110. The water outlet or water inlet of the pre-carbon filter element 110 is connected to a first wastewater pipeline, so that the wastewater enters the first wastewater pipeline from the water outlet of the activated carbon filter element and then is discharged from the wastewater outlet pipeline. The wastewater outlet of the post-carbon filter element 120 can be the same as the water outlet or water inlet of the post-carbon filter element 120. The water outlet or water inlet of the post-carbon filter element 120 is connected to a second wastewater pipeline and then is discharged from the wastewater outlet pipeline.

[0087] It can be understood that the non-high-temperature-resistant filter element 170 is not resistant to high temperatures. After being rinsed with normal-temperature water or after normal water production, the wastewater in the non-high-temperature-resistant filter element 170 can be discharged. That is, a third wastewater pipeline is connected to the wastewater outlet of the non-high-temperature-resistant filter element 170, and an outlet valve is provided on the third wastewater pipeline, so that the wastewater in the non-high-temperature-resistant filter element 170 can flow out from the wastewater outlet of the non-high-temperature-resistant filter element 170 and enter the second wastewater pipeline, and then be discharged from the wastewater outlet pipeline.

[0088] The first inlet valve 153, the second inlet valve 154, and the outlet valve can each be an electromagnetic valve.

[0089] When the flushing pipeline is connected to the water inlet of the pre-activated carbon filter element 110, the wastewater is discharged from the water outlet of the pre-activated carbon filter element 110; similarly, when the flushing pipeline is connected to the water outlet of the pre-activated carbon filter element 110, the wastewater is discharged from the water inlet of the pre-activated carbon filter element 110; when the flushing pipeline is connected to the water inlet of the post-activated carbon filter element 120, the wastewater is discharged from the water outlet of the post-activated carbon filter element 120; when the flushing pipeline is connected to the water outlet of the post-activated carbon filter element 120, the wastewater is discharged from the water inlet of the post-activated carbon filter element 120.

[0090] It can be understood that an outlet valve is provided on the wastewater outlet pipeline. When the outlet valve is closed, the normal water production can be ensured. Both the inlet valve and the outlet valve can be used to control the on-off of a single pipeline.

[0091] In another embodiment, as Figure 2 and Figure 3 shown, the water purification system 100 further includes: a pretreatment filter element 160 and a non-high-temperature-resistant filter element 170. The pretreatment filter element 160 is connected in series on the water production pipeline and is located upstream of the pre-activated carbon filter element 110; the non-high-temperature-resistant filter element 170 is connected in series on the water production pipeline and is located downstream of the pre-activated carbon filter element 110 and upstream of the post-activated carbon filter element 120; wherein, the water production pipeline includes a first water path, a second water path, and a third water path. The first water path connects the water outlet of the pretreatment filter element 160 and the water inlet of the pre-activated carbon filter element 110, the second water path connects the water outlet of the pre-activated carbon filter element 110 and the water inlet of the non-high-temperature-resistant filter element 170, the third water path connects the water outlet of the non-high-temperature-resistant filter element 170 and the water inlet of the post-activated carbon filter element 120, and the control valve group 150 further includes an inlet valve. When a second switching valve 152 is provided in the second water path or the third water path, one inlet valve is respectively provided in two of the three water paths.

[0092] It can be understood that the water inlet of the pretreatment filter element 160 can be connected to tap water, and the water outlet of the pretreatment filter element 160, the water inlet of the pre-carbon filter element 110, the water outlet of the pre-carbon filter element 110, the water inlet of the non-high-temperature-resistant filter element 170, the water outlet of the non-high-temperature-resistant filter element 170, the water inlet of the post-carbon filter element 120, and the water outlet of the post-carbon filter element 120 are sequentially connected to the water production pipeline; among them, one or more water inlet valves are provided, and the water inlet valves are arranged on the water production pipeline, and the switching between the water production pipeline and the flushing pipeline can be realized by controlling the water inlet valves and the first switching valve 151 and the second switching valve 152. Therefore, the water inlet valves can be selectively opened or closed.

[0093] It can be seen that the water production pipeline is sequentially provided with a pretreatment filter element 160, a pre-carbon filter element 110, a non-high-temperature-resistant filter element 170, a post-carbon filter element 120, and a pure water cylinder 130 from upstream to downstream. A booster pump 180 is provided upstream of the waterway where tap water is connected, and the booster pump 180 can pass tap water into the pretreatment filter element 160. Tap water can be passed into the pretreatment filter element 160 through the booster pump 180, and the booster pump 180 can control the opening or closing of the entire water purification system 100. The pretreatment filter element 160 is mainly used to remove organic matters, residual chlorine, colloids, heavy metals, and sediment particles, etc., and has various forms, such as the pretreatment filter element 160 composed of a series connection of a first-stage PP cotton or ultrafiltration and a first-stage pre-activated carbon, or the pretreatment filter element 160 composed of two filter elements in series, or directly using a composite filter element in the form of a first-stage PCB as the pretreatment filter element 160.

[0094] The pretreatment filter element 160 can be a pretreatment filter element for pre-treating tap water to remove large impurities in the tap water. The non-high-temperature-resistant filter element 170 is a precision treatment filter element, for example, it can be a reverse osmosis membrane filter element. The non-high-temperature-resistant filter element 170 is mainly composed of an RO membrane, which is the core component of the water purification system 100, with extremely high purification accuracy, and can filter out all impurity molecules except water molecules, but it is not resistant to high temperature, and the hot water pipeline for realizing the regeneration of the activated carbon filter element needs to avoid this stage of filter element. The non-high-temperature-resistant filter element 170 does not participate in the flushing of the flushing pipeline. Therefore, a separate waste water outlet is provided on the non-high-temperature-resistant filter element 170 to regularly discharge the waste water of the non-high-temperature-resistant filter element 170. The waste water outlet of the non-high-temperature-resistant filter element 170 is connected to the waste water outlet pipeline, and the waste water can also be discharged separately. When discharging the waste water separately, a water outlet valve is provided.

[0095] The water supply pipeline includes a tap water access waterway, a first waterway, a second waterway, a third waterway, a fourth waterway, and a fifth waterway arranged in sequence from upstream to downstream. One end of the tap water access waterway can access tap water, and the other end of the tap water access waterway is connected to the water inlet of the pre-carbon filter element 110. One end of the first waterway is connected to the water outlet of the pretreatment filter element 160, and the other end of the first waterway is connected to the water inlet of the pre-carbon filter element 110. One end of the second waterway is connected to the water outlet of the pre-carbon filter element 110, and the other end of the second waterway is connected to the water inlet of the non-high-temperature-resistant filter element 170. One end of the third waterway is connected to the water outlet of the non-high-temperature-resistant filter element 170, and the other end of the third waterway is connected to the water inlet of the post-carbon filter element 120. One end of the fourth waterway is connected to the water outlet of the post-carbon filter element 120, and the other end of the fourth waterway is connected to the water inlet of the pure water cylinder 130. One end of the fifth waterway is connected to the water outlet of the pure water cylinder 130, and the other end of the fifth waterway is connected to the water inlet of the hot water tank.

[0096] When a first inlet valve 153 is provided on the first waterway, water can be supplied to the pre-carbon filter element 110, or the water flow into the pretreatment filter element 160 can be cut off. A second switching valve 152 is provided on the second waterway to enable reverse flushing of the pre-carbon filter element 110 through the first pipeline 192. A second inlet valve 154 is provided on the third waterway, and the second pipeline 193 performs reverse flushing on the post-carbon filter element 120. The wastewater enters the wastewater discharge pipeline from the water inlets of the pre-activated carbon and the post-carbon filter element 120 respectively and then is discharged.

[0097] In this structural form, during the normal water production stage, as Figure 3 shown, the first inlet valve 153 and the second inlet valve 154 are opened, the first switching valve 151 and the second switching valve 152 are closed, and the outlet valve connected to the wastewater discharge pipeline is closed. The water supply pipeline is in circulation. The raw water is pressurized by the booster pump 180 and then sequentially passes through the water inlet of the pretreatment filter element 160, the water outlet of the pretreatment filter element 160, the first inlet valve 153, the water inlet of the pre-carbon filter element 110, the water outlet of the pre-carbon filter element 110, the second switching valve 152, the water inlet of the non-high-temperature-resistant filter element 170, the water outlet of the non-high-temperature-resistant filter element 170, the second inlet valve 154, the water inlet of the post-carbon filter element 120, the water outlet of the post-carbon filter element 120, the first switching valve 151, the water inlet of the pure water cylinder 130, the water outlet of the pure water cylinder 130, and the water inlet of the hot water tank, thereby completing water production. When water needs to be taken, water can be taken through the water outlet of the hot water tank. As Figure 3 shown, the arrow direction indicates the normal water production flow direction.

[0098] When it is necessary to regenerate the activity of the activated carbon, the first inlet valve 153 can be closed to prevent the water flowing out of the water outlet of the pre-carbon filter element 110 from entering the pretreatment filter element 160, and the second inlet valve 154 can be closed to prevent the water flowing out of the water outlet of the post-carbon filter element 120 from entering the non-high-temperature-resistant filter element 170. Both the first switching valve 151 and the second switching valve 152 are opened to make the flushing pipeline unobstructed.

[0099] Specifically, in the hot water flushing and regeneration stage, as Figure 4 shown, when both the first inlet valve 153 and the second inlet valve 154 are closed, both the first outlet valve 155 and the second outlet valve 156 are opened, and both the first switching valve 151 and the second switching valve 152 are opened, the heating device is controlled to heat. The hot water in the hot water generating device 140 enters the first pipeline 192 and the second pipeline 193 simultaneously through the first switching valve 151. The hot water in the first pipeline 192 enters the water outlet of the pre-carbon filter element 110 through the second switching valve 152 for reverse hot water flushing. After the flushing is completed, the waste water flows out from the water inlet of the pre-carbon filter element 110 and enters the waste water outflow pipeline and is discharged. At the same time, the hot water in the second pipeline 193 directly enters the water outlet of the post-carbon filter element 120 for reverse hot water flushing. After the flushing is completed, the waste water flows out from the water inlet of the post-carbon filter element 120 and enters the waste water outflow pipeline and is discharged. In this way, the hot water regeneration is completed. As Figure 4 shown, the arrow direction in the figure is the flow direction of the hot water during hot water flushing.

[0100] As Figure 5 shown, in the cooling water flushing stage, that is, the cooling stage after hot water flushing, the difference from hot water flushing is that the purified water in the pure water cylinder 130 enters the first pipeline 192 and the second pipeline 193 through the first switching valve 151, thus completing the cooling water flushing. As Figure 5 shown, the arrow direction in the figure is the flow direction of the normal temperature water during normal temperature water flushing.

[0101] As Figure 6 and Figure 7 shown, when the first inlet valve 153 is arranged on the first water path, the first pipeline 192 can be connected to the water outlet end of the first inlet valve 153, which can prevent the water in the first pipeline 192 from entering the water inlet of the pretreatment filter element 160, so that the water in the first pipeline 192 enters the water inlet of the pre-carbon filter element 110 to conduct forward flushing on the pre-carbon filter element 110. At the same time, when the second inlet valve 154 is arranged on the second water path, the second switching valve 152 is arranged on the third water path, and forward flushing of the post-carbon filter element 120 can be realized through the second pipeline 193.

[0102] In this structural form, as Figure 6As shown in the figure, during the normal water production stage, the first water inlet valve 153 and the second water inlet valve 154 are opened, the first switching valve 151 and the second switching valve 152 are closed, and the water outlet valve connected to the waste water discharge pipeline is closed. The water production pipeline is in circulation, so that normal water production can be completed, and the water filtered by the pre-carbon filter element 110 enters the non-high-temperature-resistant filter element 170 for further purification. When it is necessary to regenerate the activity of the activated carbon, the first water inlet valve 153 can be closed to prevent the hot water in the first pipeline 192 from entering the water outlet of the pretreatment filter element 160, and the second water inlet valve 154 is closed to prevent the water flowing out of the water outlet of the pre-carbon filter element 110 from entering the non-high-temperature-resistant filter element 170. Both the first switching valve 151 and the second switching valve 152 are opened, so that the flushing management is in circulation.

[0103] Specifically, during the hot water flushing and regeneration stage, as Figure 7 shown, when both the first water inlet valve 153 and the second water inlet valve 154 are closed, both the first water outlet valve 155 and the second water outlet valve 156 are opened, and both the first switching valve 151 and the second switching valve 152 are opened. The heating device is controlled to heat, and the hot water generated by the hot water generating device 140 directly enters the water inlet of the pre-carbon filter element 110 through the first pipeline 192 for forward flushing of hot water. After the flushing is completed, the waste water flows out of the water outlet of the pre-carbon filter element 110 and is discharged into the waste water discharge pipeline. At the same time, the hot water enters the second pipeline 193 and enters the water inlet of the post-carbon filter element 120 through the second switching valve 152 for forward flushing of hot water, and the waste water flows out of the water outlet of the post-carbon filter element 120 and is discharged through the first switching valve 151. In this way, the hot water regeneration is completed. As Figure 7 shown, the arrow direction in the figure is the flow direction of the hot water during the hot water flushing.

[0104] During the cold water flushing stage, as Figure 8 shown, the cooling flushing can be carried out with tap water. The first water inlet valve 153 is opened, the second water inlet valve 154 is closed, and both the first switching valve 151 and the second switching valve 152 are opened. The tap water enters the water inlet of the pretreatment filter element 160 through the high-pressure pump, and enters the first pipeline 192 and the water inlet of the pre-carbon filter element 110 through the water outlet of the pretreatment filter element 160 and the first water inlet valve 153 for forward flushing. Among them, the tap water entering the first pipeline 192 continues to enter the second pipeline 193, and then enters the water inlet of the post-activated carbon through the second switching valve 152 for forward flushing. As Figure 8 shown, the arrow direction in the figure is the flow direction of the tap water during the tap water flushing.

[0105] As Figure 9 shown, according to an embodiment of the present invention, on the other hand, a water production control method for the water purification system 100 is further provided, including the following steps:

[0106] Step S101: The control valve group 150 controls the flow of the water production pipeline to produce water;

[0107] Step S103: After the water production is completed, the control valve group 150 controls the flow of the flushing pipeline, so that the hot water generated by the hot water generating device 140 simultaneously enters the post-carbon filter element 120 and the pre-carbon filter element 110 for hot water flushing;

[0108] Step S105: After the hot water flushing is completed, the control valve group 150 controls the normal temperature water or tap water in the pure water cylinder 130 to simultaneously enter the post-carbon filter element 120 and the pre-carbon filter element 110 for cooling.

[0109] The control valve group 150 controls the flow of the water production pipeline, so that normal water production can be realized. When the normal water production is completed, the pure water cylinder 130 is heated by the heating device, so that the water in the pure water cylinder 130 becomes hot water. Through the control valve group 150, the hot water simultaneously enters the post-carbon filter element 120 and the pre-carbon filter element 110 for hot water flushing, so that the contaminants in the post-carbon filter element 120 and the pre-carbon filter element 110 can be effectively stripped and removed in the flowing water, realizing the effective regeneration of the pre-carbon filter element 110 and the post-carbon filter element 120.

[0110] After the flushing is completed, the control valve group 150 controls the tap water or the normal temperature water in the pure water cylinder 130 to simultaneously enter the post-carbon filter element 120 and the pre-carbon filter element 110 for cooling, so as not to affect the subsequent normal water production.

[0111] Specifically, after the water production is completed, the control valve group 150 controls the flow of the flushing pipeline, so that the hot water generated by the hot water generating device 140 simultaneously enters the post-carbon filter element 120 and the pre-carbon filter element 110 for hot water flushing, which specifically includes:

[0112] Step S201: Control the first switching valve 151 of the control valve group 150, so that the hot water generated by the hot water generating device 140 simultaneously enters the first branch pipeline 192 and the second branch pipeline 193;

[0113] Step S203: The hot water enters the water outlet of the post-carbon filter element 120 through the second branch pipeline 193 for reverse flushing, and control the second switching valve 152 of the control valve group 150, so that the hot water simultaneously entering the first branch pipeline 192 enters the water outlet of the pre-carbon filter element 110 for reverse flushing; or

[0114] Step S301: Control the first switching valve 151 of the control valve group 150 to cut off the water production pipeline connected to the water inlet of the pure water cylinder 130;

[0115] Step S303: Control the hot water generated by the hot water generating device 140 to enter the main pipe 191 of the flushing pipeline, so that the hot water enters the water inlet of the pre-carbon filter element 110 through the first branch pipe 192 for forward flushing, and control the second switching valve 152 of the control valve group 150, so that the hot water synchronously enters the water inlet of the post-carbon filter element 120 for forward flushing.

[0116] The hot water for disinfection and regeneration shares a heating module with the purified drinking outlet. The post-carbon filter element 120 and the pre-carbon filter element 110 are regenerated in parallel. The water flow direction of the regeneration pipeline is opposite to that of the normal water supply pipeline. The hot water flowing out of the hot water generating device 140 is divided into two parts, which flow to the post-carbon filter element 120 and the pre-carbon filter element 110 respectively, realizing the reverse flushing regeneration of the activated carbon filter element. While the reverse flushing pipeline realizes effective regeneration, it can dredge the structure of the carbon filter element through the reverse flushing force and take away some impurities. Set the program to start the regeneration mode. The heated pure water enters the activated carbon filter element through the reverse pipeline, and the control valve according to the specified logic makes the hot water in the carbon filter element in a flowing flushing or static state. The hot water flows and flushes for a specified time or stands for a specified number of times. After that, start the cooling mode. After the entire regeneration mode ends, enter the normal water supply mode.

[0117] After the hot water flushing is over, the control valve group 150 controls the normal temperature water or tap water in the pure water cylinder 130 to synchronously enter the post-carbon filter element 120 and the pre-carbon filter element 110 for cooling, specifically including:

[0118] Step S401: Control the first switching valve 151 of the control valve group 150, so that the pure water in the pure water cylinder 130 synchronously enters the first branch pipe 192 and the second branch pipe 193;

[0119] Step S403: The pure water enters the water outlet of the post-carbon filter element 120 through the second branch pipe 193 for reverse flushing, and control the second switching valve 152 of the control valve group 150, so that the pure water synchronously entering the first branch pipe 192 enters the water outlet of the pre-carbon filter element 110 for reverse flushing; or

[0120] Control the tap water to enter the water inlet of the pre-carbon filter element 110 and the first branch pipe 192 through the first water inlet valve 153 at the same time, so that the tap water enters the second branch pipe 193 through the first branch pipe 192 and enters the water inlet of the post-carbon filter element 120 through the second switching valve 152 for forward flushing.

[0121] In the water production control method of the above water purification system 100, at least control the first switching valve 151 and the second switching valve 152 to be closed so that the water supply pipeline is unblocked; or at least control the first switching valve 151 and the second switching valve 152 to be opened so that the flushing pipeline is unblocked, which can simplify the control of the water purification system 100.

[0122] Among them, the hot water flowing through the flushing pipeline flushes or soaks the post-carbon filter element 120 and the pre-carbon filter element 110 with running water.

[0123] The water temperature of the hot water is greater than the ambient normal temperature and less than the water boiling point temperature so as to be able to fully regenerate the activated carbon.

[0124] The control valve group 150 is alternately opened or closed, and can cooperate with the normal temperature cooling mode for alternate regeneration cooling to obtain the best regeneration effect.

[0125] The operation of each of the above parts and the opening or closing of the control valve group 150 are controlled by the program of the whole machine operation. According to the detected relevant parameters, such as the net water volume, time, water temperature, liquid level, etc., it controls the opening or closing of the booster pump 180, the power of the heating device, the temperature regulating device, the opening and closing of the pipeline control valve, etc. to realize the switching of the following various operation modes. Among them, the thermal regeneration form includes various forms such as running water flushing, soaking, short-time, long-time, etc. The water temperature for thermal regeneration is greater than the ambient normal temperature and less than the water boiling point. The system controls the heating and temperature regulating devices to cooperate with different temperature regeneration forms. While the user is drinking normal drinking water, it realizes the full-automatic in-situ disinfection and regeneration of the activated carbon, including short-time disinfection and long-time regeneration, so as to effectively ensure the water purification performance and reduce the frequency of filter element replacement.

[0126] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A water purification system, characterized in that, Comprising: A water production pipeline, on which a pre-carbon filter element (110), a post-carbon filter element (120), and a pure water cylinder (130) are connected in series in sequence; A hot water generating device (140), adapted to selectively heat the pure water in the pure water cylinder (130); A flushing pipeline, including a main pipeline (191), a first branch pipeline (192), and a second branch pipeline (193). One end of the main pipeline (191) is connected to the hot water generating device (140), the first branch pipeline (192) and the second branch pipeline (193) are respectively connected to the main pipeline (191), and one end of the first branch pipeline (192) is connected to the water inlet or water outlet of the pre-carbon filter element (110), and one end of the second branch pipeline (193) is connected to the water inlet or water outlet of the post-carbon filter element (120); A control valve group (150), connected to the water production pipeline and the flushing pipeline. The control valve group (150) switches to control the flow of the water production pipeline or controls the flow of the flushing pipeline. The flow of the flushing pipeline enables the hot water or tap water generated by the hot water generating device (140) or the normal temperature water in the pure water cylinder (130) to flush the post-carbon filter element (120) and the pre-carbon filter element (110) synchronously; the control valve group (150) includes a water inlet valve and a second switching valve (152). The second switching valve (152) is arranged on the water production pipeline for feeding water into the water inlet of the pre-carbon filter element (110) and the water inlet of the post-carbon filter element (120) to switch the water path between the first branch pipeline (192) and the corresponding water production pipeline; or to switch the water path between the second branch pipeline (193) and the corresponding water production pipeline; A non-high-temperature-resistant filter element (170), connected in series on the water production pipeline, and the non-high-temperature-resistant filter element (170) is located downstream of the pre-carbon filter element (110) and upstream of the post-carbon filter element (120)(120); the water production pipeline includes a first water path, a second water path, and a third water path. The first water path connects the water inlet of the pre-carbon filter element (110), the second water path connects the water outlet of the pre-carbon filter element (110) and the water inlet of the non-high-temperature-resistant filter element (170), and the third water path connects the water outlet of the non-high-temperature-resistant filter element (170) and the water inlet of the post-carbon filter element (120); when the second switching valve (152) is arranged on the second water path or the third water path, then one water inlet valve is respectively arranged on two of the three water paths; Wherein, the water inlet and the water outlet are referenced with respect to the water flow direction of the water production pipeline.

2. The water purification system according to claim 1, wherein The control valve group (150) includes: A first switching valve (151), arranged on the water production pipeline between the water outlet of the post-carbon filter element (120) and the water inlet of the pure water cylinder (130). The first switching valve (151) is adapted to cut off or connect the water path between the water outlet of the post-carbon filter element (120) and the water inlet of the pure water cylinder (130).

3. The water purification system according to claim 2, characterized in that, The water outlet end of the main pipeline (191) is connected to the first switching valve (151). The water inlet ends of the first branch pipeline (192) and the second branch pipeline (193) are respectively connected to the upstream of the water supply pipeline of the first switching valve (151). The water outlet end of the first branch pipeline (192) is connected to the second switching valve (152); or the water inlet ends of the first branch pipeline (192) and the second branch pipeline (193) are respectively connected to the water outlet end of the main pipeline (191), and the water outlet end of the second branch pipeline (193) is connected to the second switching valve (152).

4. The water purification system according to claim 2 or 3, characterized in that, Both the first switching valve (151) and the second switching valve (152) are two-way valves. The two-way valve has three valve ports. Two valve ports of the two-way valve are respectively connected to the water supply pipeline to connect the corresponding water supply pipeline when closed. Wherein, when the second switching valve (152) is connected to the first branch pipeline (192), the third valve port of the second switching valve (152) is connected to the first branch pipeline (192) to connect the first branch pipeline (192) when the second switching valve (152) is opened; when the second switching valve (152) is connected to the second branch pipeline (193), the third valve port of the second switching valve (152) is connected to the second branch pipeline (193) to connect the second branch pipeline (193) when the second switching valve (152) is opened.

5. The water purification system according to claim 2 or 3, characterized in that, The water purification system further includes a waste water outlet pipeline, and the waste water outlet pipeline is connected to the water inlet or outlet of the pre-carbon filter element (110) and the water inlet or outlet of the post-carbon filter element (120).

6. The water purification system according to claim 2 or 3, characterized in that, The water purification system further includes: A pretreatment filter element (160), which is connected in series on the water supply pipeline, and the pretreatment filter element (160) is located upstream of the pre-carbon filter element (110); Wherein, the first water path connects the water outlet of the pretreatment filter element (160) and the water inlet of the pre-carbon filter element (110).

7. A water production control method for a water purification system, characterized in that, For performing on the water purification system according to any one of claims 1 to 6, including: The control valve group (150) controls the flow of the water supply pipeline to produce water; After the water production is completed, the control valve group (150) controls the flow of the flushing pipeline, so that the hot water generated by the hot water generating device (140) simultaneously enters the post-carbon filter element (120) and the pre-carbon filter element (110) for hot water flushing; After the hot water flushing is completed, the control valve group (150) controls the normal temperature water or tap water in the pure water cylinder (130) to simultaneously enter the post-carbon filter element (120) and the pre-carbon filter element (110) for cooling.

8. The water production control method of the water purification system according to claim 7, characterized in that After the water production is completed, the control valve group (150) controls the flow of the flushing pipeline, so that the hot water generated by the hot water generating device (140) simultaneously enters the post-carbon filter element (120) and the pre-carbon filter element (110) for hot water flushing, specifically including: Control the first switching valve (151) of the control valve group (150) so that the hot water generated by the hot water generating device (140) simultaneously enters the first branch pipe (192) and the second branch pipe (193); The hot water enters the water outlet of the post-carbon filter element (120) through the second branch pipe (193) for reverse flushing, and control the second switching valve (152) of the control valve group (150) so that the hot water entering the first branch pipe (192) simultaneously enters the water outlet of the pre-carbon filter element (110) for reverse flushing; or Control the first switching valve (151) of the control valve group (150) to cut off the water supply pipe connected to the water inlet of the pure water cylinder (130); Control the hot water generated by the hot water generating device (140) to enter the main pipe (191) of the flushing pipeline, so that the hot water enters the water inlet of the pre-carbon filter element (110) through the first branch pipe (192) for forward flushing, and control the second switching valve (152) of the control valve group (150) so that the hot water simultaneously enters the water inlet of the post-carbon filter element (120) for forward flushing.

9. The water production control method of the water purification system according to claim 8, characterized in that After the hot water flushing is completed, the control valve group (150) controls the normal temperature water or tap water of the pure water cylinder (130) to simultaneously enter the post-carbon filter element (120) and the pre-carbon filter element (110) for cooling, specifically including: Control the first switching valve (151) of the control valve group (150) so that the pure water of the pure water cylinder (130) simultaneously enters the first branch pipe (192) and the second branch pipe (193); The pure water enters the water outlet of the post-carbon filter element (120) through the second branch pipe (193) for reverse flushing, and control the second switching valve (152) of the control valve group (150) so that the pure water entering the first branch pipe (192) simultaneously enters the water outlet of the pre-carbon filter element (110) for reverse flushing; or Control the tap water to enter the water inlet of the pre-carbon filter element (110) and the first branch pipe (192) simultaneously through the first water inlet valve (153), so that the tap water enters the second branch pipe (193) through the first branch pipe (192) and enters the water inlet of the post-carbon filter element (120) through the second switching valve (152) for forward flushing.

10. The water production control method of the water purification system according to claim 8, characterized in that, At least control the first switching valve (151) and the second switching valve (152) to close so that the water supply pipe is in circulation; or at least control the first switching valve (151) and the second switching valve (152) to open so that the flushing pipeline is in circulation.

11. The water production control method of the water purification system according to claim 10, characterized in that, The first switching valve (151) and the second switching valve (152) are alternately opened or closed.

12. The water production control method of the water purification system according to any one of claims 7 to 11, characterized in that, The hot water after the flushing pipeline is in circulation flushes or soaks the post-carbon filter element (120) and the pre-carbon filter element (110) with flowing water.

13. The water production control method of the water purification system according to claim 12, characterized in that, The water temperature of the hot water is greater than the ambient normal temperature and less than the boiling point temperature of water.

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