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 production control method thereof, wherein the water purification device comprises: 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 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, which is arranged on the water production pipeline and the flushing pipeline, and the control valve group switches to control the flow of the water production pipeline or controls the flow of the flushing pipeline, and 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 then forwardly enter the pre-carbon filter element; wherein, the flow direction of water in the water production process is forward, and the carbon filter element is flushed by hot water, which can effectively strip off and remove impurities, realize the effective regeneration of activated carbon, increase the service life of the activated carbon filter element, and avoid 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, such as reverse osmosis membrane filters, are extremely precise and serve as the core treatment element of the water purification system. Post-treatment filters are used to remove trace elements, adjust pH, and enhance 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, arranged on 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 then forwardly enter the pre-carbon filter element; wherein, 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 converted into hot water through the hot water generating device, and the hot water is allowed to enter the rear carbon filter element through the control valve group, thereby backwashing the rear carbon filter element. The contaminants in the rear carbon filter element can be effectively stripped and removed in the running water, achieving effective regeneration of the rear carbon filter element. Then, the hot water enters the front carbon filter element from the rear carbon filter element for forward flushing. The contaminants in the front carbon filter element can be effectively stripped and removed in the running water, achieving effective regeneration of the front 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, adapted to switch the water production pipeline or the flushing pipeline to communicate with the water inlet of the pre-carbon filter element; a second switching valve, adapted to switch the water production pipeline or the flushing pipeline to communicate with the water inlet of the post-carbon filter element;

[0008] The third switching valve is suitable for switching the water production pipeline or the flushing pipeline to be connected with the water outlet of the post-carbon filter element.

[0009] By switching between the water production pipeline and the flushing pipeline through the first switching valve, the second switching valve and the third switching valve, reverse flushing of the rear carbon filter element and forward flushing of the front carbon filter element can be completed, thereby realizing regeneration of the activated carbon. The structure is simple, reliable and easy to implement.

[0010] In an optional embodiment, the first switching valve, the second switching valve and the third switching valve are all 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.

[0011] 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.

[0012] In an optional embodiment, the water production pipeline includes: a first water channel, one end of which is connected to the water inlet of the pre-carbon filter element; a second water channel, one end of which is connected to the water inlet of the post-carbon filter element; a third water channel, one end of which is connected to the water outlet of the post-carbon filter element, and the other end of the third water channel is connected to the water inlet of the pure water cylinder; wherein, the first switching valve is arranged on the first water channel, the second switching valve is arranged on the second water channel, and the third switching valve is arranged on the third water channel, and the flushing pipeline includes a first branch pipe and a second branch pipe, one end of the first branch pipe is connected to the water outlet of the hot water generating device, the other end of the first branch pipe is connected to a valve port of the third switching valve, and the two ends of the second branch pipe are respectively connected to a valve port of the second switching valve and a valve port of the first switching valve.

[0013] In an optional embodiment, the water purification device also includes a reverse osmosis membrane filter element, which is connected in series on the water production pipeline and is located between the pre-carbon filter element and the post-carbon filter element. A water inlet valve is provided on the water production pipeline between the pre-carbon filter element and the reverse osmosis membrane filter element, and the water inlet valve can be selectively opened or closed.

[0014] The beneficial effect is that the reverse osmosis membrane filter element can filter out all impurity molecules except water molecules. The hot water pipeline for regenerating the activated carbon filter element needs to avoid this level of filter element. Therefore, an inlet valve is installed on the water pipeline. During normal water production, the inlet valve can be opened to allow water filtered by the pre-carbon filter element to enter the reverse osmosis membrane filter element for further purification. When the activated carbon needs to be reactivated, the inlet valve can be closed to prevent hot water flowing out of the water outlet of the pre-carbon filter element from entering the reverse osmosis membrane filter element.

[0015] 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.

[0016] The beneficial effect is that waste water can be discharged through the waste water outlet pipe.

[0017] 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 water 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 water outlet of the pure water cylinder.

[0018] The beneficial effect is that by storing pure water in the hot tank, hot water can enter the flushing pipeline from the hot water outlet of the hot tank, or by heating the pure water cylinder through a heating device to obtain hot water, hot water can enter the flushing pipeline from the outlet of the pure water cylinder.

[0019] On the other hand, the present invention also provides a water production control method for a water purification device, comprising:

[0020] The control valve group controls the flow of the water pipeline to produce water;

[0021] After the water production is completed, the flushing pipeline is controlled so that the hot water generated by the hot water generator enters the rear carbon filter element in the reverse direction and then enters the front carbon filter element in the forward direction for hot water flushing;

[0022] After the hot water flushing is completed, the normal temperature water in the pure water cylinder is controlled to flow into the post-carbon filter element in the reverse direction and then flow into the pre-carbon filter element in the forward direction for cooling.

[0023] The beneficial effect is that the control valve group controls the flow of water in the water production pipeline, thereby achieving normal water production. When normal water production is completed, the control valve group allows the hot water generated by the hot water generator to enter the rear carbon filter element, thereby backwashing the rear carbon filter element. The contaminants in the rear carbon filter element can be effectively stripped and removed in the running water, achieving effective regeneration of the rear carbon filter element. Then, the hot water enters the front carbon filter element from the rear carbon filter element for forward flushing. The contaminants in the front carbon filter element can be effectively stripped and removed in the running water, achieving effective regeneration of the front carbon filter element, extending the service life of the activated carbon filter element, and avoiding frequent replacement of the activated carbon filter element.

[0024] In an optional embodiment, when the control valve group is in a closed state, the water production pipeline is in circulation; or when the control valve group is in an open state, the flushing pipeline is in circulation.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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

[0030] 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.

[0031] Figure 1 This is a working principle diagram of a water purification device according to an embodiment of the present invention;

[0032] Figure 2 This is a working principle diagram of another water purification device according to an embodiment of the present invention;

[0033] 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;

[0034] 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;

[0035] 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;

[0036] 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.

[0037] Description of reference numerals:

[0038] 100. Water purification device;

[0039] 101. First Waterway;

[0040] 102, Second Waterway;

[0041] 103, Third Waterway;

[0042] 104, the first branch pipeline;

[0043] 105, second branch pipeline;

[0044] 106. Wastewater outlet pipe;

[0045] 110, pre-carbon filter;

[0046] 120, post-carbon filter;

[0047] 130. Pure water cylinder;

[0048] 140. Hot water generating device;

[0049] 150. Control valve group;

[0050] 151, first switching valve;

[0051] 152, second switching valve;

[0052] 153, third switching valve;

[0053] 154. Water inlet valve;

[0054] 155. First water outlet valve;

[0055] 156. Second water outlet valve;

[0056] 1501, first valve port;

[0057] 1502, second valve port;

[0058] 1503, third valve port;

[0059] 160. Non-high temperature resistant filter element;

[0060] 170. Pretreatment filter element;

[0061] 180. Booster pump. DETAILED DESCRIPTION

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] The main methods of extending the life of carbon filter elements through regeneration are physical high temperature, steam or vibration, and chemical reagents.

[0067] For example, activated carbon fibers can be regenerated by high-temperature steam. However, this method is suitable for large-scale purification and treatment equipment in the petrochemical and environmental protection industries, has high process implementation requirements, and is not suitable for household water purifiers. The gaps in the activated carbon can be cleared to restore the adsorption capacity of the activated carbon, allowing it to complete the regeneration process by itself. However, the implementation device is complex and requires the addition of additional flocculants, which cannot guarantee the safety of the use process and drinking water. The filter element can also be regenerated by soaking in chlorine dioxide and adding high-temperature steam. However, the introduction of the chemical substance chlorine dioxide cannot guarantee the safety of water quality. The activated carbon can also be regenerated by electrochemical methods, in an electrolytic state, by decomposing and reducing the pollutants adsorbed in the activated carbon and then desorbing them. However, the precipitation of metal substances in the solution cannot guarantee the safety of drinking water and increases electricity consumption.

[0068] In addition, small size is the main development trend of the market at present, and low cost helps to improve product competitiveness. Through the above analysis, it is necessary to find a more effective universal technology for extending the life of carbon filter elements.

[0069] If the technology of in-situ extension of carbon filter life can be realized, the problems of short carbon filter life and frequent filter replacement can be solved, while meeting energy-saving and environmental protection requirements and improving product competitiveness.

[0070] The following combination Figures 1 to 6 , describing embodiments of the present invention.

[0071] like Figure 1As 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 heating device. The water production pipeline is sequentially connected in series with a pre-carbon filter element 110, a post-carbon filter element 120, a pure water cartridge 130 and a hot water generator 140, and the hot water generator is suitable for 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 provided on 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 140 or the normal temperature water of the pure water cartridge 130 to reversely enter the post-carbon filter element 120 and then forwardly enter the pre-carbon filter element 110;

[0072] Among them, the flow direction of water during the water production process is positive.

[0073] 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.

[0074] The temperature of hot water can break the balance between the carbon and the pollutant adsorbent, allowing the pollutants to be desorbed, thereby restoring some of the adsorption capacity of the activated carbon and achieving regeneration.

[0075] Specifically, the temperature is between the ambient temperature and the boiling point of water, so that hot water at this temperature not only has a flushing effect but is also safe and convenient.

[0076] Specifically, the hot water generating device includes a hot water tank or heating device having a pure water inlet and a hot water outlet, the pure water inlet being connected to the water outlet of the pure water cylinder, and the hot water outlet being connected to the flushing pipeline. The heating device is adapted to heat the pure water cylinder so that hot water flows from the pure water cylinder outlet into the flushing pipeline.

[0077] It can be understood that the hot tank can be provided with a heating element on the tank body so that the water entering the hot tank can be hot water. The heating device can heat the water in the pure water cylinder so that the water coming out of the pure water cylinder is hot water.

[0078] Specifically, the hot water generator 140 is the heating and water outlet unit, which can be a hot water tank, or include a heating device and a temperature control device. The heating device is often a stainless steel heating tube or an electric heating wire, which generates heat to rapidly heat the purified water in the pure water cylinder 130 to a specified temperature. The temperature control device connects the pure water storage unit and the heating device, and can control the water intake temperature through heat exchange or water mixing. The power of the above heating devices is controlled by the control module based on the relevant sensor parameters detected.

[0079] Part of the water production pipeline is used as part of the flushing pipeline, so that the flushing pipeline can complete reverse flushing. That is, the water production pipeline between the water inlet of the post-carbon filter element 120 and the pure water cylinder 130 can be used as part of the flushing pipeline.

[0080] When normal water production is completed, the control valve group 150 controls the water production pipeline to be closed, and hot water is generated by the hot water generating device 140. The hot water enters the water outlet of the post-carbon filter element 120 through the first branch pipe 104, so that the post-carbon filter element 120 can be reversely flushed. The pollutants in the post-carbon filter element 120 can be effectively stripped and removed in the flowing water, thereby realizing the effective regeneration of the post-carbon filter element 120.

[0081] Then, hot water enters the second branch pipe 105 from the water inlet of the post-activated carbon, and enters the pre-carbon filter 110 through the water inlet of the pre-carbon filter 110 for forward flushing. The pollutants in the pre-carbon filter 110 can be effectively stripped and removed in the flowing water, thereby realizing the effective regeneration of the pre-carbon filter 110.

[0082] 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 third switching 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 inlet of the front carbon filter element 110, the second switching valve 152 is suitable for switching the water production pipeline or the flushing pipeline to be connected to the water inlet of the rear carbon filter element 120, and the third switching valve 153 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.

[0083] The above-mentioned first switching valve 151 is arranged on the water supply pipeline connected to the water inlet of the pre-carbon filter element 110, and the first switching valve 151 is connected to the second branch pipeline 105 of the flushing pipeline, so that the first switching valve 151 can switch between the water supply pipeline and the flushing pipeline.

[0084] The second switching valve 152 is provided on the water supply pipeline connected to the water inlet of the post-charcoal filter 120, and the second switching valve 152 is connected to the second branch pipeline 105 of the flushing pipeline, so that the second switching valve 152 can switch between the water supply pipeline and the flushing pipeline.

[0085] The third switching valve 153 is arranged on the water production pipeline between the water outlet of the post-carbon filter 120 and the water inlet of the pure water cylinder 130, and the third switching valve 153 is arranged on the first branch pipeline 104 of the flushing pipeline, so that the third switching valve 153 can switch between the water production pipeline and the flushing pipeline.

[0086] When the first switching valve 151, the second switching valve 152, and the third switching valve 153 are all switched to the water production pipeline, water production can be normal. When the first switching valve 151, the second switching valve 152, and the third switching valve 153 are all switched to the flushing pipeline, the post-activated carbon core and the pre-activated carbon core can be flushed in sequence to achieve activated carbon regeneration.

[0087] Specifically, the first switching valve 151, the second switching valve 152 and the third switching valve 153 are all two-way valves, each having three valve ports. Two 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.

[0088] The first switching valve 151 , the second switching valve 152 and the third switching valve 153 mentioned above can also be replaced by two water inlet valves 154 , and the valve components are used to control the correct pipeline switching.

[0089] 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.

[0090] For example, the three valve ports of the two-way valve are 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 connected to the water supply pipeline, and the third valve port 1503 is connected to the flushing pipeline. When the two-way valve is closed, the first valve port 1501 and the third valve port 1503 are opened, so that the water supply pipeline is connected; and when the two-way valve is opened, the first valve port 1501 and the second valve port 1502 are opened, so that the flushing pipeline is connected.

[0091] Specifically, if Figure 3 As shown, the water production pipeline includes: a first water channel 101, a second water channel 102 and a third water channel 103. One end of the first water channel 101 is connected to the water inlet of the front carbon filter element 110, one end of the second water channel 102 is connected to the water inlet of the rear carbon filter element 120, one end of the third water channel 103 is connected to the water outlet of the rear carbon filter element 120, and the other end of the third water channel 103 is connected to the water inlet of the pure water cylinder 130.

[0092] Among them, the first switching valve 151 is arranged on the first water channel 101, the second switching valve 152 is arranged on the second water channel 102, and the third switching valve 153 is arranged on the third water channel 103. The flushing pipeline includes a first branch pipeline 104 and a second branch pipeline 105. One end of the first branch pipeline 104 is connected to the water outlet of the hot water generator 140, and the other end of the first branch pipeline 104 is connected to a valve port of the third switching valve 153. The two ends of the second branch pipeline 105 are respectively connected to a valve port of the second switching valve 152 and a valve port of the first switching valve 151.

[0093] In another embodiment, continue to combine Figure 2 As shown, the water purification device 100 also includes a non-high temperature resistant filter element 160, which is connected in series on the water production pipeline and is located between the pre-carbon filter element 110 and the post-carbon filter element 120. A water inlet valve 154 is provided on the water production pipeline between the pre-carbon filter element 110 and the non-high temperature resistant filter element 160, and the water inlet valve 154 can be selectively opened or closed.

[0094] The above-mentioned non-high temperature resistant filter element 160 may include a reverse osmosis membrane filter element, which is mainly composed of an RO membrane. It is the core component of the water purification device 100 and has extremely high purification accuracy. It can filter out all impurity molecules except water molecules, but it is not resistant to high temperatures. The hot water pipeline for regenerating the activated carbon filter element needs to avoid this level of filter element.

[0095] Therefore, a water inlet valve 154 is provided on the water production pipeline. During normal water production, the water inlet valve 154 can be opened to allow the water filtered by the pre-carbon filter element 110 to enter the non-high temperature resistant filter element 160 for further purification.

[0096] When the activity of the activated carbon needs to be regenerated, the water inlet valve 154 can be closed to prevent the hot water flowing out of the water outlet of the pre-carbon filter element 110 from entering the non-high temperature resistant filter element 160.

[0097] Furthermore, if Figure 4 and Figure 5 As shown, the water purification device 100 also includes a wastewater outlet pipe 106 , and the pre-carbon filter element 110 and the non-high temperature resistant filter element 160 are respectively provided with wastewater outlets, which are connected to the wastewater outlet pipe 106 .

[0098] 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 outlet of the pre-carbon filter element 110. The outlet of the pre-carbon filter element 110 is connected to the first wastewater pipeline. The first wastewater pipeline is provided with a first outlet valve 155. Open the first outlet valve 155 to allow the wastewater to enter the first wastewater pipeline from the outlet of the activated carbon filter element and then be discharged from the wastewater outlet pipeline 106.

[0099] 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 106.

[0100] The water inlet valve 154 , the first water outlet valve 155 , and the second water outlet valve 156 may be solenoid valves respectively.

[0101] In another embodiment, the water purification device 100 further includes a pre-treatment filter element 170 , which is connected in series to the water production pipeline, and a water outlet of the pre-treatment filter element 170 is connected to a water inlet of the pre-carbon filter element 110 .

[0102] Specifically, tap water can be passed into the pre-treatment filter element 170 through the booster pump 180, and the opening or closing of the entire water purification device 100 can be controlled.

[0103] The pretreatment filter element 170 is mainly used to remove organic matter, residual chlorine, colloids, heavy metals and sediment particles, etc., and has various forms. For example, the pretreatment filter element 170 is composed of a first-level PP cotton or ultrafiltration and a first-level pre-activated carbon connected in series. Two filter elements are connected in series to form the pretreatment filter element 170, or a composite filter element in the form of a first-level PCB is directly used as the pretreatment filter element 170.

[0104] 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 first switching valve 151, and the pre-carbon filter element 110 is connected to the non-high temperature resistant filter element 160 through the water inlet valve 154. 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 outlet valve 156. The pure water outlet enters the post-carbon filter element through the second switching valve 152 and then enters the pure water cylinder 130 through the third switching valve 153. Figure 3 The arrow direction is the direction of water flow in normal water production.

[0105] Continue to combine Figure 4 As shown, in the hot water flushing regeneration stage, when the water inlet valve 154 is closed and the first water outlet valve 155 is opened, the three two-way valves are all open, and the hot water generated by the hot water generator 140 enters the post-carbon filter element 120 through the third switching valve 153, and then enters the pre-carbon filter element 110 through the second switching valve 152 and the first switching valve 151. The hot regeneration wastewater is discharged 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.

[0106] Continue to combine Figure 5 As shown, in the normal temperature water flushing regeneration stage, when the water inlet valve 154 is 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 third switching valve 153, and then enters the pre-carbon filter element 110 through the second switching valve 152 and the first switching valve 151. The normal temperature cooling waste water is discharged through the second water outlet valve 156, 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.

[0107] The water purification device 100 generally comprises a filter element, a pure water storage unit, and a heated water outlet unit. It also includes water production piping, heat regeneration piping, cooling piping, and related supporting components. The filter element purifies raw water to drinking water standards. The fourth-stage filter element is often a post-activated carbon filter, which adjusts the water's taste.

[0108] The booster pump is used to increase pressure and control the entire water purification system's on / off function, while the water pump is used to provide water to users. Pipeline control valves include wastewater solenoid valves, used for boosting pressure to purify water from reverse osmosis filters and for flushing and draining wastewater; inlet solenoid valves, used to control the on / off function of a single pipeline; and two-way valves, which have one inlet and two outlets.

[0109] The operation of the above parts and the shutdown of the components are controlled by the program of the whole machine operation. According to the relevant parameters detected, such as water purification volume, time, water temperature, liquid level, etc., the start and stop of the booster pump, the power of the heating device, the temperature control device, the shutdown of the pipeline control valve, etc. are controlled to achieve the switching of the following various operating modes. While the user is drinking water normally, the activated carbon is automatically disinfected and regenerated in situ, including short-time disinfection and long-time regeneration, which effectively guarantees the water purification performance and reduces the frequency of core replacement.

[0110] The hot water used for disinfection and regeneration shares a heating module with the pure drinking water outlet. The post-activated carbon and pre-activated carbon regeneration are connected in series. The fourth-stage treatment filter element is first reverse-flushed and then the second-stage treatment filter element is forward-flushed to achieve flushing and regeneration of the activated carbon filter element. While the flushing pipeline is effectively regenerated, the contaminants on the activated carbon can be effectively stripped and removed in the running water. The program is set to start the regeneration mode. The heated pure water enters the activated carbon filter element through the reverse pipeline. The hot water in the carbon filter element is controlled by the specified logic valve to make it flow, flush or stand still. The hot water regeneration mode is to flush with hot water for a specified time or stand still for a specified number of times. After the hot water is flushed, the cooling mode is started. After the entire regeneration mode is completed, the normal water production mode is entered.

[0111] like Figure 6 As shown, according to an embodiment of the present invention, on the other hand, a water production control method of a water purification device 100 is also provided, comprising the following steps:

[0112] Step S101: The control valve group 150 controls the flow of water through the water production pipeline to produce water;

[0113] Step S103: After the water production is completed, the flushing pipeline is controlled so that the hot water generated by the hot water generator 140 flows into the post-carbon filter 120 in the reverse direction and then flows into the pre-carbon filter 110 in the forward direction for hot water flushing;

[0114] Step S105: After the hot water 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 forward into the pre-carbon filter element 110 for cooling.

[0115] The control valve assembly 150 controls the flow of water through the water production pipeline, thereby achieving normal water production. When normal water production is completed, the hot water generator 140 generates hot water, which is then directed through the control valve assembly 150 to enter the post-carbon filter 120, thereby backwashing the post-carbon filter 120. Contaminants in the post-carbon filter 120 can be effectively stripped and removed in the flowing water, achieving effective regeneration of the post-carbon filter 120. Then, the hot water from the post-carbon filter 120 enters the pre-carbon filter 110 for forward flushing. Contaminants in the pre-carbon filter 110 can be effectively stripped and removed in the flowing water, achieving effective regeneration of the pre-carbon filter 110.

[0116] 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 forward into the pre-carbon filter element 110 for cooling, so as to avoid affecting the subsequent normal water production.

[0117] In the water production control method of the water purification device 100 described above, when the control valve group 150 is in a closed state, the water production pipeline is open; or when the control valve group 150 is in an open state, the flushing pipeline is open, which can simplify the control of the water purification device 100.

[0118] The hot water flowing through the flushing pipeline flushes or soaks the post-carbon filter element 120 and the pre-carbon filter element 110 .

[0119] The water temperature of the hot water is higher than the ambient temperature and lower than the boiling point of water so as to fully regenerate the activated carbon.

[0120] The control valve group 150 is alternately opened or closed, and can be coordinated with the normal temperature cooling mode for alternate regeneration cooling to obtain the best regeneration effect.

[0121] The operation 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 clean 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.

[0122] Among them, the thermal regeneration forms include various forms such as running water flushing, soaking, short-time and long-time. The water temperature used for thermal regeneration is greater than the ambient temperature and less than the boiling point of water. The system controls the heating and temperature control devices to match different temperature regeneration forms.

[0123] While users are drinking water normally, the activated carbon can be fully automatically disinfected and regenerated in situ, including short-term disinfection and long-term regeneration, thereby effectively ensuring water purification performance and reducing the frequency of core replacement.

[0124] 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 provided on 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 generated by the hot water generating device or the normal temperature water of the pure water cylinder (130) to flow in the reverse direction into the post-carbon filter element (120) and then forward into the pre-carbon filter element (110); A non-high-temperature-resistant filter element (160) is connected in series on the water production pipeline and is located between the pre-carbon filter element (110) and the post-carbon filter element (120); a water inlet valve (154) is provided on the water production pipeline between the pre-carbon filter element (110) and the non-high-temperature-resistant filter element (160); the water inlet valve (154) can be selectively opened or closed; during normal water production, the water inlet valve (154) is opened to allow water filtered by the pre-carbon filter element (110) to enter the non-high-temperature-resistant filter element (160) for further purification; when the activity of the activated carbon needs to be regenerated, the water inlet valve (154) is closed to prevent hot water flowing out of the water outlet of the pre-carbon filter element (110) from entering the non-high-temperature-resistant filter element (160); Among them, the flow direction of water during the water production process is positive.

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 pre-carbon filter element (110); A second switching valve (152) is 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 third switching valve (153) 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 (100) according to claim 2, characterized in that: The first switching valve (151), the second switching valve (152) and the third switching valve (153) are all two-way valves, each having three valve ports, two of which are connected to the water production pipeline, and the other valve port is connected to the flushing pipeline.

4. The water purification device (100) according to claim 3, characterized in that: The water production pipeline comprises: A first water channel (101), one end of which is connected to the water inlet of the pre-carbon filter element (110); A second water channel (102), one end of which is connected to the water inlet of the post-carbon filter element (120); A third water channel (103), one end of which is connected to the water outlet of the post-carbon filter element (120), and the other end of which is connected to the water inlet of the pure water cylinder (130); The first switching valve (151) is provided on the first water channel (101), the second switching valve (152) is provided on the second water channel (102), and the third switching valve (153) is provided on the third water channel (103). The flushing pipeline includes a first branch pipeline (104) and a second branch pipeline (105). One end of the first branch pipeline (104) is connected to the water outlet of the hot water generating device (140), and the other end of the first branch pipeline (104) is connected to a valve port of the third switching valve (153). The two ends of the second branch pipeline (105) are respectively connected to a valve port of the second switching valve (152) and a valve port of the first switching valve (151).

5. The water purification device according to any one of claims 1 to 4, characterized in that The water purification device (100) further comprises a wastewater outlet pipeline (106), 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 (106).

6. The water purification device according to any one of claims 1 to 4, characterized in that The hot water generating device comprises: A hot water tank having a pure water inlet and a hot water outlet, wherein the pure water inlet is connected to the outlet of the pure water cylinder (130), and the hot water outlet is connected to the flushing pipeline; or The heating device is suitable for heating the pure water cylinder (130) so that hot water enters the flushing pipeline from the water outlet of the pure water cylinder (130).

7. A water production control method for a water purification device, characterized in that: include: The control valve group controls the flow of the water pipeline to produce water; After the water production is completed, the flushing pipeline is controlled so that the hot water generated by the hot water generator enters the rear carbon filter element in the reverse direction and then enters the front carbon filter element in the forward direction for hot water flushing; After the hot water flushing is completed, the normal temperature water in the pure water cylinder is controlled to flow into the post-carbon filter element in the reverse direction and then flow into the pre-carbon filter element in the forward direction for cooling.

8. The water production control method of a water purification device according to claim 7, characterized in that: When the control valve group (150) is in a closed state, the water production pipeline is in circulation; or when the control valve group (150) is in an open state, the flushing pipeline is in circulation.

9. The water production control method of a water purification device according to claim 7, 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).

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

11. The water production control method for a water purification device according to any one of claims 7 to 10, characterized in that: The control valve group (150) is alternately opened or closed.

Images