Water purification device and water production control method thereof

Abstract

The present invention relates to the technical field of water purification and discloses a water purification device and a water purification control method thereof, the water purification device comprising: a water production pipeline, on which a pre-carbon filter element, a post-carbon filter element and a pure water cartridge are sequentially connected in series; a hot water generating device, suitable for selectively heating the pure water in the pure water cartridge; a flushing pipeline, on which a post-carbon filter element and a pre-carbon filter element are sequentially connected in series; a control valve group, connected to the water production pipeline and the flushing pipeline, the control valve group switches to control the flow of the water production pipeline or controls the flow of the flushing pipeline, the flow of the flushing pipeline causes the hot water generated by the hot water generating device or the normal temperature water of the pure water cartridge to reversely enter the post-carbon filter element and the pre-carbon filter element in sequence; wherein the pre-carbon filter element and the post-carbon filter element both comprise a carbon water purification unit, and the flow direction of water during the water production process is forward, and impurities can be effectively stripped and removed by reverse flushing, thereby achieving effective regeneration of activated carbon, improving the service life of the activated carbon filter element, and avoiding frequent replacement of the activated carbon filter element.

Description

Technical Field

[0001] The present invention relates to the technical field of water purification devices, and in particular to a water purification device and a water production control method thereof. Background Art

[0002] During the pipeline transportation process, tap water inevitably becomes contaminated with rust, silt, organic matter, and microorganisms. With increasing concern about water quality safety, water purifiers with purification functions are gradually gaining market acceptance. A water purifier's water purification system typically includes a pre-treatment filter element, a precision filter element, and a post-treatment filter element. The pre-treatment filter element is used to remove organic matter, colloids, heavy metals, and silt particles. Precision filters are extremely precise, such as non-high-temperature resistant filters, and are the core treatment filter element of the water purification system. Post-treatment filters are used to remove trace elements, adjust pH, and enhance drinking taste.

[0003] Activated carbon filter element is an indispensable and important component of the post-treatment filter element of the water purifier. In the relevant existing technology, some methods such as improving carbon material, manufacturing process and increasing carbon dosage are adopted to increase 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 the service life of the activated carbon filter element 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 device to solve the problem of short service life and frequent replacement of activated carbon filter elements used in purification devices in the prior art.

[0005] On the one hand, the present invention provides a water purification device, comprising: a water production pipeline, on which a pre-carbon filter element, a post-carbon filter element and a pure water cartridge are sequentially connected in series; a hot water generating device, suitable for selectively heating the pure water in the pure water cartridge; a flushing pipeline, on which the post-carbon filter element and the pre-carbon filter element are sequentially connected in series; a control valve group, connected to the water production pipeline and the flushing pipeline, the control valve group switches to control the flow of the water production pipeline or controls the flow of the flushing pipeline, the flow of the flushing pipeline allows the hot water generated by the hot water generating device or the normal temperature water of the pure water cartridge to reversely enter the post-carbon filter element and the pre-carbon filter element in sequence; wherein, the pre-carbon filter element and the post-carbon filter element both include carbon water purification units, and the flow direction of water during the water production process is forward.

[0006] The beneficial effect is that the control valve group controls the flow of water production pipelines, thereby achieving normal water production. When normal water production is completed, the pure water in the pure water cylinder is heated by the hot water generating device to generate hot water. The hot water is then allowed to enter the post-carbon filter element through the control valve group, thereby backwashing the post-carbon filter element. The contaminants in the post-carbon filter element can be effectively stripped and removed in the running water, achieving effective regeneration of the post-carbon filter element. Then, the hot water enters the pre-carbon filter element from the post-carbon filter element for backwashing. The contaminants in the pre-carbon filter element can be effectively stripped and removed in the running water, achieving effective regeneration of the pre-carbon filter element, extending the service life of the activated carbon filter element, and avoiding frequent replacement of the activated carbon filter element.

[0007] In an optional embodiment, the control valve group includes: a first switching valve, suitable for switching the water production pipeline or the flushing pipeline to be connected to the water inlet of the post-carbon filter element; a second switching valve, suitable for switching the water production pipeline or the flushing pipeline to be connected to the water outlet of the post-carbon filter element; a first water inlet valve, arranged on the water production pipeline, to open the corresponding water production channel during normal water production, or to cut off the corresponding water production channel during reverse flushing.

[0008] By switching between the water production pipeline and the flushing pipeline through the first switching valve, the second switching valve and the first water inlet valve, the reverse flushing of the rear carbon filter element and the front carbon filter element can be completed in turn, thereby realizing the regeneration of the activated carbon. The structure is simple, reliable and easy to implement.

[0009] In an optional embodiment, the first switching valve and the second switching valve are both two-way valves, each having three valve ports, two of which 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 is closed to connect the water production pipeline, and the two-way valve is opened to connect the flushing pipeline.

[0010] By opening or closing the two-way valve, switching between the water production pipeline and the flushing pipeline, or switching between the hot water flushing pipeline and the normal temperature flushing pipeline can be easily achieved.

[0011] In an optional embodiment, the water production pipeline includes: the water purification device also includes: a pretreatment filter element, which is connected in series on the water production pipeline, and the water inlet of the pretreatment filter element can be connected to the water inlet end, and the water outlet of the pretreatment filter element and the water inlet of the pre-carbon filter element are connected to the water production pipeline in sequence; a non-high temperature resistant filter element, which is connected in series on the water production pipeline, and the water outlet of the pre-carbon filter element, the water inlet of the non-high temperature resistant filter element, the water outlet of the non-high temperature resistant filter element and the water inlet of the post-carbon filter element are connected to the water production pipeline in sequence; wherein, the first water inlet valve is arranged on the water production pipeline between the water outlet of the pre-carbon filter element and the water inlet of the non-high temperature resistant filter element, and a second water inlet valve is provided on the water production pipeline between the water outlet of the pretreatment filter element and the water inlet of the pre-carbon filter element, and the first water inlet valve and the second water inlet valve can be selectively opened or closed respectively.

[0012] The beneficial effect is that all impurity molecules except water molecules can be filtered out by the non-high-temperature resistant filter element. The hot water pipeline for regenerating the activated carbon filter element needs to avoid this level of filter element. Therefore, an inlet valve is set on the water pipeline. During normal water production, the inlet valve can be opened to allow the water filtered by the pre-carbon filter element to enter the non-high-temperature resistant filter element for further purification. When the activity of the activated carbon needs to be regenerated, the inlet valve can be closed to prevent the hot water flowing out of the outlet of the pre-carbon filter element from entering the non-high-temperature resistant filter element. The pre-treatment filter element can be used to remove organic matter, residual chlorine, colloids, heavy metals, and sediment particles, thereby reducing the impurities entering the pre-carbon filter element and the post-carbon filter element, which is conducive to the regeneration of the pre-carbon filter element and the post-carbon filter element.

[0013] In an optional embodiment, the water purification device further includes a wastewater outlet pipeline, and the pre-carbon filter element and the non-high temperature resistant filter element are respectively provided with a wastewater outlet, and the wastewater outlet is connected to the wastewater outlet pipeline.

[0014] The beneficial effect is that waste water can be discharged through the waste water outlet pipe.

[0015] On the other hand, the present invention also provides a water production control method for a water purification device, comprising:

[0016] The control valve group controls the flow of the water pipeline to produce water;

[0017] After the water production is completed, the control valve group controls the flow of the flushing pipeline, so that the hot water generated by the hot water generator enters the rear carbon filter element and the front carbon filter element in reverse order for hot water flushing;

[0018] After the hot water flushing is completed, the control valve group controls the normal temperature water in the pure water cylinder to reversely enter the post-carbon filter element and the pre-carbon filter element in turn for cooling.

[0019] The beneficial effect is that the control valve group controls the flow of water pipelines, thereby achieving normal water production. When normal water production is completed, hot water is generated by the heating device, and the hot water passes through the control valve group to enter the post-carbon filter element, thereby backwashing the post-carbon filter element. The contaminants in the post-carbon filter element can be effectively stripped and removed in the running water, achieving effective regeneration of the post-carbon filter element. Then, the hot water enters the pre-carbon filter element from the post-carbon filter element for backwashing. The contaminants in the pre-carbon filter element can be effectively stripped and removed in the running water, achieving effective regeneration of the pre-carbon filter element, extending the service life of the activated carbon filter element, and avoiding frequent replacement of the activated carbon filter element.

[0020] In an optional embodiment, the control valve group is closed to allow the water production pipeline to circulate; or the control valve group is opened to allow the flushing pipeline to circulate.

[0021] The beneficial effect is that 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 can be completed by controlling the opening or closing of the valve group, which is easy to achieve.

[0022] In an optional embodiment, the hot water flowing through the flushing pipeline is used to flush or soak the post-carbon filter element and the pre-carbon filter element.

[0023] The beneficial effect is that the post-carbon filter element and the pre-carbon filter element can be regenerated by flushing with running water or soaking for a preset time. The regeneration of the activated carbon can be adjusted according to specific detection parameters, which is more flexible.

[0024] In an optional embodiment, the water temperature of the hot water is higher than the ambient temperature and lower than the boiling point of water, which can complete the regeneration of the activated carbon without damaging the activated carbon.

[0025] In an optional embodiment, the control valve group is alternately opened or closed, and can be combined with a normal temperature cooling mode for alternate regeneration cooling to obtain a better regeneration effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 This is a working principle diagram of a water purification device according to an embodiment of the present invention;

[0028] Figure 2This is a working principle diagram of another water purification device according to an embodiment of the present invention;

[0029] Figure 3 This is a working principle diagram of the water production process of a water purification device according to an embodiment of the present invention;

[0030] Figure 4 This is a working principle diagram of the regeneration and flushing process of a water purification device according to an embodiment of the present invention;

[0031] Figure 5 This is a working principle diagram of the cooling and flushing process of a water purification device according to an embodiment of the present invention;

[0032] Figure 6 The present invention is a flowchart of a water production control method for a water purification device according to an embodiment of the present invention.

[0033] Description of reference numerals:

[0034] 100. Water purification device;

[0035] 110, pre-carbon filter;

[0036] 120, post-carbon filter;

[0037] 130. Pure water cylinder;

[0038] 140. Hot water generating device;

[0039] 150. Control valve group;

[0040] 151, first switching valve; 152, second switching valve; 153, first water inlet valve;

[0041] 154, second water inlet valve, 155, first water outlet valve; 156, second water outlet valve;

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

[0043] 160. Non-high temperature resistant filter element;

[0044] 170. Pretreatment filter element;

[0045] 180. Booster pump. DETAILED DESCRIPTION

[0046] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0047] The water purification system of a water purifier usually includes a pre-treatment filter element, a precision filter element, and a post-treatment filter element. The pre-treatment filter element pre-treats the incoming tap water. The use of activated carbon in the pre-treatment filter element can effectively remove oxidizing substances such as residual chlorine that may damage the precision filter element RO filter element.

[0048] The process of pollutant adsorption by activated carbon primarily involves physical adsorption and chemical adsorption. Physical adsorption is the primary adsorption process in activated carbon; changing conditions can disrupt the adsorption equilibrium, causing the adsorbate to desorb and detach. Chemical adsorption is an irreversible process, essentially forming a stable complex between the functional groups on the activated carbon's surface and the pollutant molecules. During the specific process of pollutant adsorption by activated carbon, physical adsorption is the primary mechanism. Once physical adsorption approaches saturation, chemical adsorption intervenes, causing the adsorbent to completely lose its effectiveness.

[0049] In view of the above characteristics of activated carbon adsorption, if a way can be found to break the balance between activated carbon and adsorbate, so that physical adsorption proceeds in the opposite direction and at the same time slows down the reaction process of chemical adsorption, then the activated carbon can be regenerated and the adsorption capacity can be restored, thus achieving the purpose of extending the service life of the activated carbon.

[0050] Methods for extending the life of carbon filters through regeneration primarily include physical application of high temperatures, steam or vibration, and chemical reagents. For example, activated carbon fibers can be regenerated using high-temperature steam. However, this method is suitable for large-scale purification treatment plants in the petrochemical and environmental protection industries and requires high process implementation, making it unsuitable for household water purifiers. Self-regeneration can be achieved by unclogging the gaps in the activated carbon to restore its adsorption capacity, but this requires complex equipment and the addition of flocculants, which cannot guarantee the safety of the filter during use or drinking water. Filters can also be regenerated through chlorine dioxide soaking and high-temperature steam. However, the introduction of chlorine dioxide as a chemical cannot guarantee water quality safety. Electrochemical methods can also be used to decompose and reduce pollutants adsorbed in the activated carbon during electrolysis, leading to desorption and regeneration. However, the precipitation of metals in the solution cannot guarantee the safety of drinking water and increases energy consumption.

[0051] Furthermore, small size is currently a major market trend, and low cost helps enhance product competitiveness. Based on the above analysis, it is necessary to find a more effective universal technology for extending the life of carbon filter elements. This application aims to develop a technology that can achieve in-situ extension of carbon filter element life to address the problems of short carbon filter life and frequent element replacement, while also meeting energy conservation and environmental protection requirements and enhancing product competitiveness.

[0052] The following combination Figures 1 to 6 , describing embodiments of the present invention.

[0053] like Figure 1 As shown, according to an embodiment of the present invention, on the one hand, a water purification device 100 is provided, which includes: a water production pipeline, a flushing pipeline, a control valve group 150 and a hot water generator 140, the water production pipeline is sequentially connected in series with a pre-carbon filter element 110, a post-carbon filter element 120 and a pure water cartridge 130, and the hot water generator 140 is suitable for selectively heating the pure water in the pure water cartridge 130; the flushing pipeline is sequentially connected in series with the post-carbon filter element 120 and the pre-carbon filter element 110; the control valve group 150 is connected to the water production pipeline and the flushing pipeline, and the control valve group 150 switches to control the flow of the water production pipeline or the flow of the flushing pipeline. The flow of the flushing pipeline allows the hot water generated by the hot water generator or the normal temperature water of the pure water cartridge 130 to enter the post-carbon filter element 120 and the pre-carbon filter element 110 in reverse order;

[0054] The pre-carbon filter element 110 and the post-carbon filter element 120 both include carbon water purification units, and the water flows in a forward direction during the water production process.

[0055] The water purification device 100 can be a water purifier, wherein the flushing pipeline is used to flush the pre-carbon filter 110 and the post-carbon filter 120. The pure water cartridge 130 is the pure water storage portion and can be implemented in various forms. For example, the pure water cartridge 130 can be in the pure water tank mode of a desktop water purifier, etc., which requires an external drive pump for water extraction or regeneration; or in the medium pressure barrel mode of a commercial water purifier, etc., which does not require an external drive pump and can store a certain volume of purified water and be driven by pressure for water extraction or regeneration. The pure water storage portion in this technical solution is implemented in the form of a pure water tank.

[0056] The temperature of the hot water is sufficient to break the equilibrium between the activated carbon and the adsorbent, allowing the pollutants to desorb and partially restore the activated carbon's adsorption capacity, achieving regeneration. Specifically, the temperature lies between ambient temperature and the boiling point of water, making it both effective and safe for flushing.

[0057] Specifically, the hot water generating device includes: a hot 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, suitable for heating the pure water cylinder so that hot water enters the flushing pipeline from the outlet of the pure water cylinder.

[0058] The hot water generator 140 includes a heating and water outlet unit, which can be a hot water tank, or a heating device and a temperature control unit. The heating device is typically a stainless steel heating tube or an electric heating wire. This heat rapidly heats the purified water in the pure water cylinder 130 to a specified temperature. The temperature control unit connects the pure water storage unit and the heating device, and controls the water intake temperature through heat exchange or water mixing. The power of the heating device is controlled by a control module based on the relevant sensor parameters detected.

[0059] During normal water production, water entering the filter element through the water inlet is considered forward flow, and water flowing out of the filter element through the water outlet is considered forward flow. However, when water enters the filter element through the water outlet, it is considered reverse flow, and water flows out of the filter element through the water inlet, it is considered reverse flow.

[0060] The flushing pipeline can be reverse-flushed, allowing part of the water production pipeline to function as part of the flushing pipeline. Specifically, the water production pipeline between the water outlet of the post-carbon filter 120 and the water inlet of the pure water cartridge 130 can function as part of the flushing pipeline, allowing the purified water stored in the pure water cartridge 130 to flow into the flushing pipeline as cooling water after hot water flushing.

[0061] When normal water production is completed, the control valve group 150 controls the water production pipeline to be closed, and the water in the pure water cylinder 130 is heated by the heating device, so that the hot water enters the water outlet of the rear carbon filter element 120, thereby backwashing the rear carbon filter element 120. The pollutants in the rear carbon filter element 120 can be effectively stripped and removed in the running water, thereby achieving effective regeneration of the rear carbon filter element 120. Then, the hot water flows out from the water inlet of the rear carbon filter element 120 and enters the water outlet of the front carbon filter element 110 to backwash the front carbon filter element 110. The pollutants in the front carbon filter element 110 can be effectively stripped and removed in the running water, thereby achieving effective regeneration of the front carbon filter element 110.

[0062] It can be understood that the pre-carbon filter 110 is located upstream of the water supply pipeline, and the post-carbon filter 120 is located downstream of the water supply pipeline. Therefore, the impurities in the post-carbon filter 120 are less than those in the pre-carbon filter 110. Hot water first flushes the post-carbon filter 120 and then enters the pre-carbon filter 110 for flushing. Compared to flushing the pre-carbon filter 110 first and then the post-carbon filter 120, this not only completes the regeneration of the post-carbon filter 120, but also prevents the filter, which originally has few impurities, from carrying more impurities due to flushing. Therefore, the regeneration effect and efficiency of the front and rear activated carbon filters can be improved.

[0063] Reverse flushing of the post-carbon filter element 120 and the pre-carbon filter element 110 is more conducive to the removal of pollutants.

[0064] Further, continue to combine Figure 1 and Figure 2 As shown, the control valve group 150 includes: a first switching valve 151, a second switching valve 152 and a first water inlet valve 153. The first switching valve 151 is suitable for switching the water production pipeline or the flushing pipeline to be connected to the water outlet of the front carbon filter element 110, and the second switching valve 152 is suitable for switching the water production pipeline or the flushing pipeline to be connected to the water outlet of the rear carbon filter element 120. The first water inlet valve 53 is arranged on the water production pipeline to open the corresponding water production channel during normal water production, or to cut off the corresponding water production channel during reverse flushing.

[0065] The solid black arrows indicate the direction of water flowing along the water production pipeline, the hollow arrows indicate the direction of hot water flowing along the flushing pipeline, and the open arrows indicate the direction of cooling water flowing along the flushing pipeline. The flushing pipeline is divided into a first branch pipeline and a second branch pipeline. One end of the first branch pipeline is connected to a valve port of the second switching valve 152, and the other end of the first branch pipeline is connected to the water outlet of the hot water generator 140. In other words, the first branch pipeline is connected in parallel with part of the water production pipeline, so that the second switching valve 152 can switch between normal water production and hot water flushing. One end of the second branch pipeline is connected to a valve port of the first switching valve 151, and the other end of the second branch pipeline is connected to the water production pipeline located upstream of the second water inlet valve 154 to connect to the water outlet of the pre-carbon filter 110. In other words, the second branch pipeline is connected in parallel with part of the water production pipeline, so that the first switching valve 151 can switch between normal water production and hot water flushing.

[0066] It can also be understood that, on the water supply line, the first switching valve 151 is located upstream of the water inlet of the post-carbon filter 120, and the first switching valve 151 is connected to the second branch of the flushing line, so that the second switching valve 152 can switch between the water supply line and the flushing line. The second switching valve 152 is located downstream of the water outlet of the post-carbon filter 120, and the second switching valve 152 is connected to the first branch of the flushing line, so that the second switching valve 152 can switch between the water supply line and the flushing line.

[0067] The connection point between the flushing line and the water supply line is located upstream of the first water inlet valve 153. This ensures that the flushing line is connected to the water inlet of the pre-carbon filter 110 during the activated carbon flushing and regeneration process, preventing flushing water from entering the water supply line. When both the first switching valve 151 and the second switching valve 152 are switched to the water supply line and the first water inlet valve 153 is open, water supply can be normally performed. When both the first switching valve 151 and the second switching valve 152 are switched to the flushing line and the first water inlet valve 153 is closed, the post-carbon filter 120 and the pre-carbon filter 110 can be flushed sequentially to achieve activated carbon regeneration.

[0068] More specifically, the first switching valve 151 and the second switching valve 152 are both two-way valves having three valve ports, two of which are connected to the water production pipeline, and the other is connected to the flushing pipeline.

[0069] The two-way valve has three valve ports. When the two-way valve is closed, the water supply pipeline is connected, and normal water supply can be achieved. When the two-way valve is opened, the flushing pipeline is connected, and the post-activated carbon valve core and the front-activated carbon valve core can be flushed.

[0070] For ease of description, the three valve ports are named first valve port 1501, second valve port 1502, and third valve port 1503. The first valve port 1501 and the third valve port 1503 are respectively connected to the water supply pipeline, with the first valve port 1501 located downstream of the water supply pipeline and the third valve port 1503 located upstream of the water supply 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 and the third valve port 1503 are connected, and the water supply pipeline is connected. When the two-way valve is opened, the first valve port 1501 and the second valve port 1502 are connected, and the flushing pipeline is switched to connection.

[0071] Of course, the first switching valve 151 and the second switching valve 152 mentioned above can also be replaced by two water inlet valves, and the valve components can be used to control the correct pipeline switching.

[0072] Specifically, if Figure 2 and Figure 3As shown, the water purification device 100 also includes: a pre-treatment filter element 170 and a reverse osmosis membrane filter element, the reverse osmosis membrane filter element is a non-high temperature resistant filter element 160, the pre-treatment filter element 170 is connected in series to the water pipe, and the water inlet of the pre-treatment filter element 170 can be connected to the water inlet end, the water outlet of the pre-treatment filter element 170 and the water inlet of the pre-carbon filter element 110 are connected to the water pipe in sequence; the non-high temperature resistant filter element 160 is connected in series to the water pipe, and the water outlet of the pre-carbon filter element 110 and the non-high temperature resistant filter element 160 are connected in series to the water pipe. The water inlet, the water outlet of the non-high temperature resistant filter element 160 and the water inlet of the post-carbon filter element 120 are connected to the water production pipeline in sequence; among them, the first water inlet valve 153 is arranged on the water production pipeline between the water outlet of the pre-carbon filter element 110 and the water inlet of the non-high temperature resistant filter element 160, and the second water inlet valve 154 is provided on the water production pipeline between the water outlet of the pretreatment filter element 170 and the water inlet of the pre-carbon filter element 110. The first water inlet valve 153 and the second water inlet valve 154 can be selectively opened or closed respectively.

[0073] It can be seen that the water production pipeline is provided with a pre-treatment filter element 170, a front carbon filter element 110, a non-high temperature resistant filter element 160, a rear carbon filter element 120 and a pure water cylinder 130 in sequence from upstream to downstream, and the water production pipeline includes a first water channel, a second water channel, a third water channel, a fourth water channel, a fifth water channel and a sixth water channel in sequence from upstream to downstream, one end of the first water channel can be connected to tap water, the other end of the first water channel is connected to the water inlet of the front carbon filter element 110, one end of the second water channel is connected to the water outlet of the pre-treatment filter element 170, and the other end of the second water channel is connected to the water inlet of the front carbon filter element 110. Then, one end of the third water channel is connected to the water outlet of the pre-carbon filter element 110, the other end of the third water channel is connected to the water inlet of the non-high temperature resistant filter element 160, one end of the fourth water channel is connected to the water outlet of the non-high temperature resistant filter element 160, the other end of the fourth water channel is connected to the water inlet of the post-carbon filter element 120, one end of the fifth water channel is connected to the water outlet of the post-carbon filter element 120, the other end of the fifth water channel is connected to the water inlet of the pure water cartridge 130, one end of the sixth water channel is connected to the water outlet of the pure water cartridge 130, and the other end of the sixth water channel is connected to the water inlet of the hot water generator 140.

[0074] A booster pump 180 is installed upstream of the first waterway to pass tap water into the pre-treatment filter cartridge 170. A second water inlet valve 154 is installed on the second waterway to selectively allow water to flow into the pre-carbon filter cartridge 110 or to block water flow into the pre-treatment filter cartridge 170. A first water inlet valve 153 is installed on the third waterway to selectively allow water to flow into the non-high-temperature resistant filter cartridge 160 or to block water flow into the non-high-temperature resistant filter cartridge 160. A first switching valve 151 is installed on the fourth waterway, and a second switching valve 152 is installed on the fifth waterway.

[0075] Non-heat-resistant filter element 160 is connected in series to the water supply pipeline, located between pre-carbon filter element 110 and post-carbon filter element 120. Primarily composed of an RO membrane, non-heat-resistant filter element 160 is a core component of water purification device 100. It offers exceptional purification precision, removing all impurities except water. However, it is not heat-resistant, and hot water lines used to regenerate the activated carbon filter element must avoid this filter element.

[0076] Opening the first water inlet valve 153 and the second water inlet valve 154 allows normal water production to be completed, allowing the water filtered by the pre-carbon filter 110 to enter the non-high-temperature resistant filter element 160 for further purification. When the activated carbon needs to be reactivated, the first water inlet valve 153 and the second water inlet valve 154 can be closed to prevent hot water flowing out of the water outlet of the pre-carbon filter 110 from entering the non-high-temperature resistant filter element 160.

[0077] Specifically, tap water can be passed into the pre-treatment filter element 170 via a booster pump 180, which can control the opening or closing of the entire water purification device 100. The pre-treatment filter element 170 is mainly used to remove organic matter, residual chlorine, colloids, heavy metals, and sediment particles. There are many forms of embodiment, such as a pre-treatment filter element 170 composed of a first-level PP cotton or ultrafiltration and a first-level pre-activated carbon in series, or a composite filter element in the form of a first-level PCB directly as the pre-treatment filter element 170.

[0078] Furthermore, if Figure 4 and Figure 5 As shown, the water purification device 100 also includes a wastewater outlet pipeline. The pre-carbon filter element 110 and the non-high temperature resistant filter element 160 are respectively provided with wastewater outlets, and the wastewater outlets are connected to the wastewater outlet pipeline.

[0079] After flushing the above-mentioned pre-carbon filter element 110, the wastewater needs to be discharged. Since the water 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 of the pre-carbon filter element 110. The water outlet of the pre-carbon filter element 110 is connected to the first wastewater pipeline. The first wastewater pipeline is provided with a first water outlet valve 155. Open the first water outlet valve 155 to allow the wastewater to enter the first wastewater pipeline from the water outlet of the activated carbon filter element and then be discharged from the wastewater outlet pipeline.

[0080] It can be understood that the non-high temperature resistant filter element 160 is not resistant to high temperatures, and the wastewater in the non-high temperature resistant filter element 160 can be discharged after flushing with normal temperature water or after normal water production, that is, the wastewater outlet of the non-high temperature resistant filter element 160 is connected to the second wastewater pipeline, and the second wastewater pipeline is provided with a second outlet valve 156. Open the second outlet valve 156, so that the wastewater in the non-high temperature resistant filter element 160 can flow out from the wastewater outlet of the non-high temperature resistant filter element 160 and enter the second wastewater pipeline, and then be discharged from the wastewater outlet pipeline.

[0081] The first water inlet valve 153 , the second water inlet valve 154 , the first water outlet valve 155 , and the second water outlet valve 156 may be solenoid valves respectively.

[0082] Continue to combine Figure 3 As shown, in the normal water production stage, the raw water inlet is connected to the booster pump 180, and after being pressurized by the booster pump 180, it enters the pre-treatment filter element 170, and the pre-treatment filter element 170 is connected to the pre-carbon filter element 110 through the second water inlet valve 154, and the pre-carbon filter element 110 is connected to the non-high temperature resistant filter element 160 through the first water inlet valve 153. The non-high temperature resistant filter element 160 has a wastewater outlet and a pure water outlet. The wastewater outlet is connected to the second water outlet valve 156. The pure water outlet enters the post-carbon filter element through the first switching valve 151 and then enters the pure water cylinder 130 through the second switching valve 152. Figure 3 The arrow direction is the direction of water flow in normal water production.

[0083] Continue to combine Figure 4 As shown, during the hot water flushing regeneration stage, when the first water inlet valve 153 and the second water inlet valve 154 are closed and the first water outlet valve 155 is open, all three two-way valves are open, and the hot water in the hot water generator 140 enters the post-carbon filter element 120 through the second switching valve 152, and then enters the pre-carbon filter element 110 through the first switching valve 151. The hot regeneration wastewater is discharged from the water inlet of the pre-carbon filter element 110 through the first water outlet valve 155, which is the hot regeneration pipeline. Figure 4 The arrows shown indicate the direction of hot water flow during hot water flushing.

[0084] Continue to combine Figure 5 As shown, in the normal temperature water flushing regeneration stage, that is, the cooling stage after hot water flushing, when the first water inlet valve 153 and the second water inlet valve 154 are closed and the first water outlet valve 155 is opened, the three two-way valves are all open, and the normal temperature pure water in the pure water cylinder 130 enters the post-carbon filter element 120 through the second switching valve 152, and then enters the pre-carbon filter element 110 through the first switching valve 151. The normal temperature cooling waste water is discharged through the first water outlet valve 155, which is the pure water cooling pipeline. Figure 5 The direction of the arrow shown is the flow direction of normal temperature water during normal temperature water flushing.

[0085] like Figure 6According to an embodiment of the present invention, on the other hand, a water production control method for a water purification device is provided, comprising the following steps:

[0086] Step S101: The control valve group controls the flow of water through the water production pipeline to produce water;

[0087] Step S103: After the water production is completed, the control valve group controls the flow of the flushing pipeline, so that the hot water generated by the hot water generator sequentially enters the rear carbon filter element and the front carbon filter element in reverse order for hot water flushing;

[0088] Step S105: After the hot water flushing is completed, the control valve group controls the room temperature water in the pure water cylinder to flow in reverse order into the post-carbon filter element and the pre-carbon filter element for cooling.

[0089] The control valve group 150 controls the flow of the water production pipeline, thereby achieving normal water production. When 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. The hot water is allowed to enter the post-carbon filter element 120 through the control valve group 150, thereby backwashing the post-carbon filter element 120. The contaminants in the post-carbon filter element 120 can be effectively stripped and removed in the running water, achieving effective regeneration of the post-carbon filter element 120. Then, the hot water enters the pre-carbon filter element 110 from the post-carbon filter element 120 for backwashing. The contaminants in the pre-carbon filter element 110 can be effectively stripped and removed in the running water, achieving effective regeneration of the pre-carbon filter element 110.

[0090] After the flushing is completed, the room temperature water in the pure water cylinder 130 is controlled to flow in the reverse direction into the post-carbon filter element 120 and then into the pre-carbon filter element 110 for cooling, so as to avoid affecting the subsequent normal water production.

[0091] In the water production control method of the water purification device 100 described above, the control valve group 150 is closed to allow the water production pipeline to flow; or the control valve group 150 is opened to allow the flushing pipeline to flow, which can simplify the control of the water purification device 100.

[0092] The hot water flowing through the flushing pipeline flushes or soaks the post-carbon filter element 120 and the pre-carbon filter element 110 .

[0093] Hot water is warmer than ambient temperature but cooler than the boiling point of water, allowing it to fully regenerate the activated carbon. Hot water, at a temperature between ambient temperature and the boiling point, not only has a flushing effect but also disrupts the equilibrium between the carbon and the adsorbent, allowing the pollutants to desorb, thereby restoring some of the activated carbon's adsorption capacity and regenerating it. This achieves beneficial results while being safe and simple.

[0094] The control valve assembly 150 is alternately opened and closed, and can be used in conjunction with the normal temperature cooling mode for alternating regeneration and cooling to achieve optimal regeneration results. Relevant parameters for initiating regeneration include the amount of clean water and the life of the filter element. Various regeneration methods can be determined based on the amount of clean water, including short-term flushing and disinfection, long-term soaking or flow regeneration, and alternating hot and cold water flushing and regeneration.

[0095] Specifically, 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 relevant parameters detected, such as the amount of purified water, time, water temperature, liquid level, etc., the opening or closing of the booster pump 180, the power of the heating device, the temperature control device, the opening and closing of the pipeline control valve, etc. are controlled to realize the switching of the following various operating modes. Among them, the thermal regeneration forms include various forms such as running water flushing, soaking, short-term and long-term. The water temperature used for thermal regeneration is greater than the ambient temperature and less than the boiling point of water. The heating and temperature control devices are controlled by the system to match the different temperature regeneration forms. While the user is drinking water normally, the activated carbon is fully automatically disinfected and regenerated in situ, including short-term disinfection and long-term regeneration, which can effectively ensure the water purification performance and reduce the frequency of core replacement.

[0096] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A water purification device, characterized in that: include: A water production pipeline, wherein a front carbon filter element (110), a rear carbon filter element (120) and a pure water cylinder (130) are sequentially connected in series on the water production pipeline; a hot water generating device (140) adapted to selectively heat the pure water in the pure water cylinder (130); a flushing pipeline, wherein the post-carbon filter element (120) and the pre-carbon filter element (110) are sequentially connected in series on the flushing pipeline; A 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 allows the hot water generated by the hot water generator (140) or the normal temperature water in the pure water cylinder (130) to reversely enter the rear carbon filter element (120) and the front carbon filter element (110) in sequence. The control valve group (150) includes a first water inlet valve (153) provided on the water production pipeline to open the corresponding water production channel during normal water production or to cut off the corresponding water production channel during reverse flushing. The non-high-temperature-resistant filter element (160) is connected in series to the water production pipeline, and the water outlet of the pre-carbon filter element (110), the water inlet of the non-high-temperature-resistant filter element (160), the water outlet of the non-high-temperature-resistant filter element (160) and the water inlet of the post-carbon filter element (120) are sequentially connected to the water production pipeline; the first water inlet valve (153) is provided on the water production pipeline between the water outlet of the pre-carbon filter element (110) and the water inlet of the non-high-temperature-resistant filter element (160), and the first water inlet valve (153) can be selectively opened or closed respectively; Wherein, the front carbon filter element (110) and the rear carbon filter element (120) both include carbon water purification units, and the flow direction of water during the water production process is forward.

2. The water purification device according to claim 1, characterized in that The control valve group (150) includes: a first switching valve (151) adapted to switch the water production pipeline or the flushing pipeline into communication with the water inlet of the post-carbon filter element (120); The second switching valve (152) is suitable for switching the water production pipeline or the flushing pipeline to communicate with the water outlet of the post-carbon filter element (120).

3. The water purification device according to claim 2, characterized in that: The first switching valve (151) and the second switching valve (152) are both two-way valves, each having three valve ports, two of which are 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 is closed to connect the water production pipeline, and is opened to connect the flushing pipeline.

4. The water purification device according to claim 2, characterized in that The water purification device also includes: A pre-treatment filter element (170) is connected in series to the water production pipeline, and the water inlet of the pre-treatment filter element (170) can be connected to the water inlet end, and the water outlet of the pre-treatment filter element (170) and the water inlet of the pre-carbon filter element (110) are connected to the water production pipeline in sequence; A second water inlet valve (154) is provided on the water supply pipeline between the water outlet of the pre-treatment filter element (170) and the water inlet of the pre-carbon filter element (110), and the second water inlet valve (154) can be selectively opened or closed.

5. The water purification device according to claim 4, characterized in that The water purification device further comprises a wastewater outlet pipeline, and the pre-carbon filter element (110) and the non-high temperature resistant filter element (160) are respectively provided with wastewater outlets, and the wastewater outlets are connected to the wastewater outlet pipeline.

6. A water production control method for a water purification device, characterized in that: Used to be performed on a water purification device according to any one of claims 1 to 5, comprising: The control valve group controls the flow of the water pipeline to produce water; After the water production is completed, the control valve group controls the flow of the flushing pipeline, so that the hot water generated by the hot water generator enters the rear carbon filter element and the front carbon filter element in reverse order for hot water flushing; After the hot water flushing is completed, the control valve group controls the normal temperature water in the pure water cylinder to reversely enter the post-carbon filter element and the pre-carbon filter element in turn for cooling.

7. The water production control method of a water purification device according to claim 6, characterized in that: The control valve group (150) is closed to allow the water production pipeline to circulate; or the control valve group (150) is opened to allow the flushing pipeline to circulate.

8. The water production control method of a water purification device according to claim 6, characterized in that: The hot water flowing through the flushing pipeline flushes or soaks the post-carbon filter element (120) and the pre-carbon filter element (110).

9. The water production control method of a water purification device according to claim 8, characterized in that: The water temperature of the hot water is higher than the ambient temperature and lower than the boiling point of water.

10. The water production control method for a water purification device according to any one of claims 6 to 9, characterized in that: The control valve group (150) is alternately opened or closed.

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