Water purification system and method for regenerating activated carbon filter cartridge of water purification system

Abstract

The present application relates to a kind of water purification system and water purification system activated carbon filter regeneration method, it is related to domestic water purification technical field, the present application embodiment includes pre-treatment filter, composite filter assembly and reverse osmosis filter assembly, pre-treatment filter is connected with raw water pipeline;Composite filter assembly has composite activated carbon filter, the composite activated carbon filter is connected with the pre-treatment filter;Reverse osmosis filter assembly is connected with the composite activated carbon filter and waste water pipeline;Wherein, heating device and ultrasonic transducer are equipped on the composite activated carbon filter, in regeneration condition, the heating device and the ultrasonic transducer are used to make the adsorbate on the composite activated carbon filter desorption.The technical scheme disclosed in the present application can solve the problem that existing water purification system needs to frequently replace activated carbon filter, the low use efficiency of activated carbon filter, causes material waste and environmental pollution.

Description

Technical Field

[0001] This invention relates to the field of household water purification technology, and particularly to a water purification system and a method for regenerating the activated carbon filter element of the water purification system. Background Technology

[0002] A water purifier, also known as a water quality purifier, is a water treatment device that performs deep filtration and purification of water according to the requirements for water use.

[0003] Most water purifiers currently in use purify tap water through their built-in purification systems. These systems typically include four filter stages: a pre-treatment filter, a pre-activated carbon filter, a reverse osmosis membrane filter, and a post-activated carbon filter. Of these, only the activated carbon filter can effectively remove residual chlorine from the water. However, activated carbon filters have a shorter lifespan compared to other filters, and the activated carbon filters used in existing water purifiers are all disposable consumables that are discarded after reaching their lifespan. This necessitates frequent replacement of activated carbon filters, resulting in low efficiency, material waste, and environmental pollution. Summary of the Invention

[0004] This invention provides a water purification system and a method for regenerating activated carbon filter cartridges in the water purification system, which can solve the problems of frequent replacement of activated carbon filter cartridges, low efficiency of activated carbon filter cartridges, material waste and environmental pollution in existing water purification systems.

[0005] In a first aspect, embodiments of the present invention provide a water purification system, comprising:

[0006] The pretreatment filter element is connected to the raw water pipeline;

[0007] A composite filtration assembly includes a composite activated carbon filter element connected to the pretreatment filter element; and

[0008] The reverse osmosis filtration assembly is connected to the composite activated carbon filter element and the wastewater pipeline.

[0009] The composite activated carbon filter element is equipped with a heating device and an ultrasonic transducer. During regeneration, the heating device and the ultrasonic transducer are used to desorb the adsorbate on the composite activated carbon filter element.

[0010] In one embodiment, the composite filtration assembly includes a purified water inlet pipe, a purified water outlet pipe, and a pure water outlet pipe; one end of the purified water inlet pipe is connected to the pretreatment filter element, the other end of the purified water inlet pipe is connected to the composite activated carbon filter element, one end of the purified water outlet pipe is connected to the composite activated carbon filter element, and the other end of the purified water outlet pipe is connected to the reverse osmosis filtration assembly.

[0011] In one embodiment, an inlet valve is provided on the purified water inlet pipe, and a drive pump is provided on the purified water outlet pipe.

[0012] In one embodiment, the reverse osmosis filtration assembly includes a reverse osmosis membrane filter element and a pure water inlet pipe; one end of the pure water inlet pipe is connected to the reverse osmosis membrane filter element, and the other end of the pure water inlet pipe is connected to the composite activated carbon filter element, wherein a check valve is provided on the pure water inlet pipe.

[0013] In one embodiment, the water purification system includes a weighing device located at the bottom of the composite activated carbon filter element.

[0014] In one embodiment, a wastewater valve is provided on the wastewater pipeline, and a drain port is provided on the composite activated carbon filter element.

[0015] Secondly, embodiments of the present invention provide a method for regenerating activated carbon filter cartridges in a water purification system, comprising:

[0016] Inject clean water into the composite activated carbon filter element;

[0017] The cleaning water injected into the composite activated carbon filter element is heated to a preset temperature using a heating device.

[0018] The composite activated carbon filter element is left to stand at the preset temperature for a preset soaking time;

[0019] After the preset soaking time, the ultrasonic transducer is turned on to desorb the adsorbate on the composite activated carbon filter element;

[0020] After the preset energy exchange time, the cleaning water containing the adsorbate is discharged.

[0021] In one embodiment, injecting cleaning water into the composite activated carbon filter element includes: opening the inlet valve and injecting cleaning water into the composite activated carbon filter element through the pretreatment filter element; and / or injecting cleaning water into the composite activated carbon filter element through the pure water outlet pipeline.

[0022] In one embodiment, injecting cleaning water into the composite activated carbon filter element includes: detecting the weight of the composite activated carbon filter element using a weighing device; if the weight of the composite activated carbon filter element is greater than a preset weight, then injecting cleaning water into the composite activated carbon filter element.

[0023] In one embodiment, heating the cleaning water injected into the composite activated carbon filter element to a preset temperature via a heating device includes: detecting whether the cleaning water fills the composite activated carbon filter element via a water level detection device; if the cleaning water fills the composite activated carbon filter element, closing the inlet valve and opening the heating device to heat the cleaning water injected into the composite activated carbon filter element to the preset temperature.

[0024] Compared with the prior art, the advantages of the embodiments of the present invention are that, by setting a heating device, the clean water injected into the composite activated carbon filter element can be heated to a preset temperature, and the adsorbate on the composite activated carbon filter element can be precipitated by soaking at the preset temperature; the composite activated carbon filter element, which has already precipitated some adsorbate after soaking, can be further desorbed by an ultrasonic transducer. This can solve the problems of frequent replacement of activated carbon filter elements, low efficiency of activated carbon filter elements, material waste and environmental pollution in existing water purification systems, effectively improve the service life of activated carbon filter elements, facilitate the use of water purification systems, and reduce material waste and environmental pollution. Attached Figure Description

[0025] The invention will now be described in more detail with reference to embodiments and the accompanying drawings.

[0026] Figure 1 This is a schematic diagram of a water purification system provided in an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of a water purification system provided in another embodiment of the present invention;

[0028] Figure 3 This is a flowchart of a method for regenerating activated carbon filter cartridges in a water purification system according to an embodiment of the present invention.

[0029] Figure label:

[0030] 10. Pre-treatment filter element;

[0031] 20. Composite filter assembly; 210. Composite activated carbon filter element; 2101. Pre-activated carbon filter element; 2102. Post-activated carbon filter element; 220. Heating device; 230. Ultrasonic transducer; 240. Purified water inlet pipe; 2401. Inlet valve; 250. Purified water outlet pipe; 2501. Drive pump; 260. Pure water outlet pipe;

[0032] 30. Reverse osmosis filter assembly; 310. Reverse osmosis membrane filter element; 320. Pure water inlet pipeline; 3201. Check valve;

[0033] 40. Wastewater pipeline; 410. Wastewater valve;

[0034] 50. Raw water pipeline. Detailed Implementation

[0035] The invention will now be further described with reference to the accompanying drawings.

[0036] Currently, water purifiers on the market purify tap water through their built-in purification systems to achieve the purpose of water purification. The water purification system of a water purifier usually includes four filter cartridges: pre-treatment filter cartridge, pre-activated carbon filter cartridge, reverse osmosis membrane filter cartridge, and post-activated carbon filter cartridge. Among the above four filter cartridges, the reverse osmosis membrane filter cartridge is the core filter cartridge. In order to effectively extend the life of the reverse osmosis membrane filter cartridge, the industry usually adopts a pre-treatment process to ensure the quality of the influent water to the reverse osmosis membrane filter cartridge. The influent water quality requirements for the reverse osmosis membrane filter cartridge mainly include turbidity ≤1NTU, SDI15<5, and residual chlorine concentration <0.1mg / L.

[0037] Existing water purifiers use PP cotton and ultrafiltration filters for pretreatment, which can effectively reduce water turbidity and SDI15. However, only activated carbon filters can effectively remove residual chlorine from water. Activated carbon filters have a shorter lifespan compared to other filters, requiring frequent replacements and limiting the rated water purification capacity of the entire machine. Furthermore, the activated carbon filters used in current water purifiers are all disposable consumables, discarded after reaching their lifespan. This results in low efficiency, material waste, and environmental pollution.

[0038] To reduce the frequency of activated carbon filter replacements and extend the lifespan of water purifier filters, the industry typically employs methods such as improving carbon materials, refining the manufacturing process of activated carbon filters, and increasing the amount of activated carbon used. However, these methods still cannot fundamentally solve the problem of the need for frequent activated carbon filter replacements. Research indicates that the process of activated carbon adsorbing pollutants mainly includes physical adsorption and chemical adsorption. Physical adsorption is the primary adsorption process in activated carbon. Changing adsorption conditions or environmental conditions can disrupt the adsorption equilibrium, causing the adsorbate to desorb. Chemical adsorption is irreversible; essentially, it involves the functional groups on the surface of activated carbon forming stable complexes with pollutant molecules. In practical applications, activated carbon initially relies primarily on physical adsorption. Once physical adsorption approaches saturation, chemical adsorption intervenes, leading to complete ineffectiveness.

[0039] Example 1

[0040] like Figure 1 , Figure 2As shown, this embodiment provides a water purification system, including a pretreatment filter element 10, a composite filter assembly 20, and a reverse osmosis filter assembly 30; the pretreatment filter element 10 is connected to the raw water pipeline 50; the composite filter assembly 20 has a composite activated carbon filter element 210, which is connected to the pretreatment filter element 10; the reverse osmosis filter assembly 30 is connected to the composite activated carbon filter element 210 and the wastewater pipeline 40; wherein, the composite activated carbon filter element 210 is provided with a heating device 220 and an ultrasonic transducer 230, and during regeneration, the heating device 220 and the ultrasonic transducer 230 are used to desorb the adsorbate on the composite activated carbon filter element 210.

[0041] It should be noted that the raw water pipeline 50 is equipped with a raw water inlet switch to control the opening and closing of the raw water pipeline 50. The pretreatment filter element 10 can be a composite of one or more of PP cotton or folded PP, ultrafiltration membrane, and microfiltration membrane. The pretreatment filter element 10 is used to remove silt, rust, suspended matter, etc. from the raw water.

[0042] It should be noted that the frequency range of the ultrasonic transducer 230 is 20kHz to 80kHz, the power range of the ultrasonic transducer 230 is 35W to 100W, and the transducer is made of food-grade stainless steel, specifically 304 or 316 stainless steel.

[0043] In some embodiments, the composite filtration assembly 20 includes a purified water inlet pipe 240, a purified water outlet pipe 250, and a pure water outlet pipe 260; one end of the purified water inlet pipe 240 is connected to the pretreatment filter element 10, the other end of the purified water inlet pipe 240 is connected to the composite activated carbon filter element 210, one end of the purified water outlet pipe 250 is connected to the composite activated carbon filter element 210, and the other end of the purified water outlet pipe 250 is connected to the reverse osmosis filtration assembly 30; wherein, the heating device 220 is disposed on the purified water inlet pipe 240 and / or the composite activated carbon filter element 210.

[0044] It should be noted that the raw water in the raw water pipeline 50, after being filtered by the pretreatment filter cartridge 10, is called purified water. The composite activated carbon filter cartridge 210 includes a pre-activated carbon filter cartridge 2101 and a post-activated carbon filter cartridge 2102. One end of the purified water inlet pipeline 240 is connected to the pretreatment filter cartridge 10, and the other end of the purified water inlet pipeline 240 is connected to the pre-activated carbon filter cartridge 2101. One end of the purified water outlet pipeline 250 is connected to the pre-activated carbon filter cartridge 2101, and the other end of the purified water outlet pipeline 250 is connected to the reverse osmosis filter assembly 30. The pure water outlet pipeline 260 is connected to the post-activated carbon filter cartridge 2102. The pre-activated carbon filter cartridge 2101 and the post-activated carbon filter cartridge 2102 are used to remove organic matter, some heavy metals, residual chlorine, discoloration, odor, etc. from the water.

[0045] It should be noted that the heating device 220 is used to heat the cleaning water flowing into the composite activated carbon filter element 210. The cleaning water can be heated to a preset temperature and then allowed to stand and soak. This allows the composite activated carbon filter element 210 to precipitate the adsorbed substances under high-temperature hot water immersion, so as to facilitate the regeneration of the composite activated carbon filter element 210. The heating device 220 can be a stainless steel heating tube, electric heating wire, etc., and the preset temperature can be 50-100℃. The preset temperature can be adjusted according to the actual situation.

[0046] It should be noted that the water purification system may also include a temperature sensor, which is installed inside the composite activated carbon filter element 210 to detect the temperature inside the composite activated carbon filter element 210. This allows for real-time feedback of the temperature inside the composite activated carbon filter element 210. When the temperature inside the composite activated carbon filter element 210 is lower than the preset temperature, the heating device 220 heats the clean water inside the composite activated carbon filter element 210 to ensure that the temperature inside the composite activated carbon filter element 210 continuously meets the preset temperature.

[0047] It should be noted that the water purification system may also include a water level sensor, which is used to detect the water level inside the composite activated carbon filter element 210 so as to detect whether the clean water fills the entire composite activated carbon filter element 210 during the regeneration process.

[0048] In some embodiments, a water inlet valve 2401 is provided on the water inlet pipe 240, and a drive pump 2501 is provided on the water outlet pipe 250.

[0049] It should be noted that the inlet valve 2401 is used to control the opening and closing of the purified water inlet pipe 240, and the drive pump 2501 is used to provide power for the flow of water. The inlet valve 2401 can be a butterfly valve, gate valve, ball valve, etc., and the drive pump 2501 can be a centrifugal pump, axial flow pump, mixed flow pump, etc. This embodiment does not specifically limit the specific form of the inlet valve 2401 and the drive pump 2501.

[0050] In some embodiments, the reverse osmosis filtration assembly 30 includes a reverse osmosis membrane filter element 310 and a pure water inlet pipe 320; one end of the pure water inlet pipe 320 is connected to the reverse osmosis membrane filter element 310, and the other end of the pure water inlet pipe 320 is connected to the composite activated carbon filter element 210, wherein a check valve 3201 is provided on the pure water inlet pipe 320.

[0051] It should be noted that the reverse osmosis membrane filter element 310 is the core component of the water purifier, with extremely high purification precision. It is used to filter out all impurity molecules except water molecules. The check valve 3201 can prevent water in the pure water inlet pipe 320 from flowing back into the reverse osmosis filter assembly 30.

[0052] It should be noted that the composite activated carbon filter element 210 includes a pre-activated carbon filter element 2101 and a post-activated carbon filter element 2102. One end of the pure water inlet pipe 320 is connected to the reverse osmosis membrane filter element 310, and the other end of the pure water inlet pipe 320 is connected to the post-activated carbon filter element 2102. The post-activated carbon filter element 2102 is connected to the pure water outlet pipe 260.

[0053] In some embodiments, a wastewater valve 410 is provided on the wastewater pipeline 40, and a drain outlet is provided on the composite activated carbon filter element 210.

[0054] It should be noted that the wastewater valve 410 is used to control the opening and closing of the wastewater pipeline 40, and the drain outlet is used to discharge clean water containing adsorbate desorbed from the composite activated carbon filter element 210.

[0055] It should be noted that the above regeneration procedure is as follows: The inlet valve 2401 is opened via the control device, and cleaning water is injected into the composite activated carbon filter element 210 through the pretreatment filter element 10; and / or cleaning water is injected into the composite activated carbon filter element 210 through the pure water outlet pipe 260. Then, the water level detection device checks whether the cleaning water fills the composite activated carbon filter element 210. If the cleaning water fills the composite activated carbon filter element 210, the inlet valve 2401 is closed, and the heating device 220 is turned on to heat the cleaning water injected into the composite activated carbon filter element 210 to a preset temperature. At this time, the drive pump 2501, wastewater valve 410, and ultrasonic transducer 230 are also closed. The composite activated carbon filter element 210 is then immersed in hot water, as adsorbent desorption is an endothermic process. The reaction allows the composite activated carbon filter element 210 to be effectively soaked in hot water, which promotes the precipitation of adsorbates on the composite activated carbon filter element 210. After the preset soaking time, the ultrasonic transducer 230 is turned on to desorb the adsorbates on the composite activated carbon filter element 210. The ultrasonic transducer 230 emits ultrasonic waves to cause ultrasonic cavitation effect in the cleaning water inside the composite activated carbon filter element 210. The high-pressure shock wave and high-speed micro-jet generated by the bursting of bubbles desorb the adsorbates on the composite activated carbon filter element 210, thereby regenerating the activated carbon filter element and extending its service life. After the preset transduction time, the cleaning water containing adsorbates is discharged. During the operation of the ultrasonic transducer 230, the inlet valve 2401, the pump, and the wastewater valve 410 are in the closed state.

[0056] In summary, the advantages of this embodiment are that by setting the heating device 220, the clean water injected into the composite activated carbon filter element 210 can be heated to a preset temperature. Soaking at the preset temperature allows the adsorbate on the composite activated carbon filter element 210 to precipitate. The ultrasonic transducer 230 can further desorb the composite activated carbon filter element 210 that has precipitated some adsorbate after soaking. This solves the problems of frequent replacement of activated carbon filter elements, low efficiency of activated carbon filter elements, material waste, and environmental pollution in existing water purification systems. It effectively improves the service life of activated carbon filter elements, facilitates the use of water purification systems, and reduces material waste and environmental pollution.

[0057] Example 2

[0058] like Figure 1 , Figure 2 As shown, this embodiment provides a water purification system, including a pretreatment filter element 10, a composite filter assembly 20, and a reverse osmosis filter assembly 30; the pretreatment filter element 10 is connected to the raw water pipeline 50; the composite filter assembly 20 has a composite activated carbon filter element 210, which is connected to the pretreatment filter element 10; the reverse osmosis filter assembly 30 is connected to the composite activated carbon filter element 210 and the wastewater pipeline 40; wherein, the composite activated carbon filter element 210 is provided with a heating device 220 and an ultrasonic transducer 230, and during regeneration, the heating device 220 and the ultrasonic transducer 230 are used to desorb the adsorbate on the composite activated carbon filter element 210.

[0059] It should be noted that the raw water pipeline 50 is equipped with a raw water inlet switch to control the opening and closing of the raw water pipeline 50. The pretreatment filter element 10 can be a composite of one or more of PP cotton or folded PP, ultrafiltration membrane, and microfiltration membrane. The pretreatment filter element 10 is used to remove silt, rust, suspended matter, etc. from the raw water.

[0060] It should be noted that the frequency range of the ultrasonic transducer 230 is 20kHz to 80kHz, the power range of the ultrasonic transducer 230 is 35W to 100W, and the transducer is made of food-grade stainless steel, specifically 304 or 316 stainless steel.

[0061] In some embodiments, the composite filtration assembly 20 includes a purified water inlet pipe 240, a purified water outlet pipe 250, and a pure water outlet pipe 260; one end of the purified water inlet pipe 240 is connected to the pretreatment filter element 10, the other end of the purified water inlet pipe 240 is connected to the composite activated carbon filter element 210, one end of the purified water outlet pipe 250 is connected to the composite activated carbon filter element 210, and the other end of the purified water outlet pipe 250 is connected to the reverse osmosis filtration assembly 30; wherein, the heating device 220 is disposed on the purified water inlet pipe 240 and / or the composite activated carbon filter element 210.

[0062] It should be noted that the raw water in the raw water pipeline 50, after being filtered by the pretreatment filter cartridge 10, is called purified water. The composite activated carbon filter cartridge 210 includes a pre-activated carbon filter cartridge 2101 and a post-activated carbon filter cartridge 2102. One end of the purified water inlet pipeline 240 is connected to the pretreatment filter cartridge 10, and the other end of the purified water inlet pipeline 240 is connected to the pre-activated carbon filter cartridge 2101. One end of the purified water outlet pipeline 250 is connected to the pre-activated carbon filter cartridge 2101, and the other end of the purified water outlet pipeline 250 is connected to the reverse osmosis filter assembly 30. The pure water outlet pipeline 260 is connected to the post-activated carbon filter cartridge 2102. The pre-activated carbon filter cartridge 2101, the post-activated carbon filter cartridge 2102, and the composite filter cartridge are used to remove organic matter, some heavy metals, residual chlorine, discoloration, odor, etc. from the water.

[0063] It should be noted that the heating device 220 is used to heat the cleaning water flowing into the composite activated carbon filter element 210. The cleaning water can be heated to a preset temperature and then allowed to stand and soak. This allows the composite activated carbon filter element 210 to precipitate the adsorbed substances under high-temperature hot water immersion, so as to facilitate the regeneration of the composite activated carbon filter element 210. The heating device 220 can be a stainless steel heating tube, electric heating wire, etc., and the preset temperature can be 50-100℃. The preset temperature can be adjusted according to the actual situation.

[0064] It should be noted that the water purification system may also include a temperature sensor, which is installed inside the composite activated carbon filter element 210 to detect the temperature inside the composite activated carbon filter element 210. This allows for real-time feedback of the temperature inside the composite activated carbon filter element 210. When the temperature inside the composite activated carbon filter element 210 is lower than the preset temperature, the heating device 220 heats the clean water inside the composite activated carbon filter element 210 to ensure that the temperature inside the composite activated carbon filter element 210 continuously meets the preset temperature.

[0065] It should be noted that the water purification system may also include a water level sensor, which is used to detect the water level inside the composite activated carbon filter element 210 so as to detect whether the clean water fills the entire composite activated carbon filter element 210 during the regeneration process.

[0066] In some embodiments, a water inlet valve 2401 is provided on the water inlet pipe 240, and a drive pump 2501 is provided on the water outlet pipe 250.

[0067] It should be noted that the inlet valve 2401 is used to control the opening and closing of the purified water inlet pipe 240, and the drive pump 2501 is used to provide power for the flow of water. The inlet valve 2401 can be a butterfly valve, gate valve, ball valve, etc., and the drive pump 2501 can be a centrifugal pump, axial flow pump, mixed flow pump, etc. This embodiment does not specifically limit the specific form of the inlet valve 2401 and the drive pump 2501.

[0068] In some embodiments, the reverse osmosis filtration assembly 30 includes a reverse osmosis membrane filter element 310 and a pure water inlet pipe 320; one end of the pure water inlet pipe 320 is connected to the reverse osmosis membrane filter element 310, and the other end of the pure water inlet pipe 320 is connected to the composite activated carbon filter element 210, wherein a check valve 3201 is provided on the pure water inlet pipe 320.

[0069] It should be noted that the reverse osmosis membrane filter element 310 is the core component of the water purifier, with extremely high purification precision. It is used to filter out all impurity molecules except water molecules. The check valve 3201 can prevent water in the pure water inlet pipe 320 from flowing back into the reverse osmosis filter assembly 30.

[0070] It should be noted that the composite activated carbon filter element 210 includes a pre-activated carbon filter element 2101 and a post-activated carbon filter element 2102. One end of the pure water inlet pipe 320 is connected to the reverse osmosis membrane filter element 310, and the other end of the pure water inlet pipe 320 is connected to the post-activated carbon filter element 2102. The post-activated carbon filter element 2102 is connected to the pure water outlet pipe 260.

[0071] In some embodiments, the water purification system includes a weighing device located at the bottom of the composite activated carbon filter element 210.

[0072] It should be noted that the weighing device is used to measure the weight of the composite activated carbon filter element 210 or the total weight of the bottle containing the composite activated carbon filter element 210. The weight of the composite activated carbon filter element 210 can be calibrated before leaving the factory to obtain the factory calibrated weight. Then, the weight of the composite activated carbon filter element 210 is monitored in real time during the use of the water purification system to obtain the real-time weight. During the use of the water purification system, the weight of the composite activated carbon filter element 210 will continuously increase due to the adsorption of a large number of impurities. When the real-time weight exceeds the preset weight difference of the factory calibrated weight, the regeneration program of the composite activated carbon filter element 210 can be started. The weighing device can be a weight sensor.

[0073] In some embodiments, a wastewater valve 410 is provided on the wastewater pipeline 40, and a drain outlet is provided on the composite activated carbon filter element 210.

[0074] It should be noted that the wastewater valve 410 is used to control the opening and closing of the wastewater pipeline 40, and the drain outlet is used to discharge clean water containing adsorbate desorbed from the composite activated carbon filter element 210.

[0075] It should be noted that the above regeneration procedure is as follows: When the real-time weight exceeds the factory-calibrated weight by a preset weight difference, the inlet valve 2401 is opened via the control device, and cleaning water is injected into the composite activated carbon filter element 210 through the pretreatment filter element 10; and / or cleaning water is injected into the composite activated carbon filter element 210 through the pure water outlet pipe 260. Then, the water level detection device detects whether the cleaning water fills the composite activated carbon filter element 210. If the cleaning water fills the composite activated carbon filter element 210, the inlet valve 2401 is closed, and the heating device 220 is turned on to heat the cleaning water injected into the composite activated carbon filter element 210 to a preset temperature. At this time, the drive pump 2501, wastewater valve 410, and ultrasonic transducer 230 are also in the closed state. At this time, the composite activated carbon filter element 210 is immersed in hot water. Since adsorbent desorption is an endothermic reaction, soaking the composite activated carbon filter element 210 in hot water can effectively promote the precipitation of adsorbates on the composite activated carbon filter element 210. After the preset soaking time, the ultrasonic transducer 230 is turned on to desorb the adsorbates on the composite activated carbon filter element 210. The ultrasonic transducer 230 emits ultrasonic waves to cause ultrasonic cavitation effect in the cleaning water inside the composite activated carbon filter element 210. The high-pressure shock wave and high-speed micro-jet generated by the bursting of bubbles desorb the adsorbates on the composite activated carbon filter element 210, thereby regenerating the activated carbon filter element and extending its service life. After the preset transduction time, the cleaning water containing adsorbates is discharged. During the operation of the ultrasonic transducer 230, the inlet valve 2401, the pump, and the wastewater valve 410 are in the closed state.

[0076] In summary, the advantages of this embodiment are that by setting the heating device 220, the clean water injected into the composite activated carbon filter element 210 can be heated to a preset temperature. Soaking at the preset temperature allows the adsorbate on the composite activated carbon filter element 210 to precipitate. The ultrasonic transducer 230 can further desorb the composite activated carbon filter element 210 that has precipitated some adsorbate after soaking. This solves the problems of frequent replacement of activated carbon filter elements, low efficiency of activated carbon filter elements, material waste, and environmental pollution in existing water purification systems. It effectively improves the service life of activated carbon filter elements, facilitates the use of water purification systems, and reduces material waste and environmental pollution.

[0077] Example 3

[0078] like Figure 1 , Figure 2As shown, this embodiment provides a water purification system, including a pretreatment filter element 10, a composite filter assembly 20, and a reverse osmosis filter assembly 30; the pretreatment filter element 10 is connected to the raw water pipeline 50; the composite filter assembly 20 has a composite activated carbon filter element 210, which is connected to the pretreatment filter element 10; the reverse osmosis filter assembly 30 is connected to the composite activated carbon filter element 210 and the wastewater pipeline 40; wherein, the composite activated carbon filter element 210 is provided with a heating device 220 and an ultrasonic transducer 230, and during regeneration, the heating device 220 and the ultrasonic transducer 230 are used to desorb the adsorbate on the composite activated carbon filter element 210.

[0079] It should be noted that the raw water pipeline 50 is equipped with a raw water inlet switch to control the opening and closing of the raw water pipeline 50. The pretreatment filter element 10 can be a composite of one or more of PP cotton or folded PP, ultrafiltration membrane, and microfiltration membrane. The pretreatment filter element 10 is used to remove silt, rust, suspended matter, etc. from the raw water.

[0080] It should be noted that the frequency range of the ultrasonic transducer 230 is 20kHz to 80kHz, the power range of the ultrasonic transducer 230 is 35W to 100W, and the transducer is made of food-grade stainless steel, specifically 304 or 316 stainless steel.

[0081] In some embodiments, the composite filtration assembly 20 includes a purified water inlet pipe 240, a purified water outlet pipe 250, and a pure water outlet pipe 260; one end of the purified water inlet pipe 240 is connected to the pretreatment filter element 10, the other end of the purified water inlet pipe 240 is connected to the composite activated carbon filter element 210, one end of the purified water outlet pipe 250 is connected to the composite activated carbon filter element 210, and the other end of the purified water outlet pipe 250 is connected to the reverse osmosis filtration assembly 30; wherein, the heating device 220 is disposed on the purified water inlet pipe 240 and / or the composite activated carbon filter element 210.

[0082] It should be noted that the raw water in the raw water pipeline 50, after being filtered by the pretreatment filter cartridge 10, is called purified water. The composite activated carbon filter cartridge 210 includes a pre-activated carbon filter cartridge 2101 and a post-activated carbon filter cartridge 2102. One end of the purified water inlet pipeline 240 is connected to the pretreatment filter cartridge 10, and the other end of the purified water inlet pipeline 240 is connected to the pre-activated carbon filter cartridge 2101. One end of the purified water outlet pipeline 250 is connected to the pre-activated carbon filter cartridge 2101, and the other end of the purified water outlet pipeline 250 is connected to the reverse osmosis filter assembly 30. The pure water outlet pipeline 260 is connected to the post-activated carbon filter cartridge 2102. The pre-activated carbon filter cartridge 2101, the post-activated carbon filter cartridge 2102, and the composite filter cartridge are used to remove organic matter, some heavy metals, residual chlorine, discoloration, odor, etc. from the water.

[0083] It should be noted that the heating device 220 is used to heat the cleaning water flowing into the composite activated carbon filter element 210. The cleaning water can be heated to a preset temperature and then allowed to stand and soak. This allows the composite activated carbon filter element 210 to precipitate the adsorbed substances under high-temperature hot water immersion, so as to facilitate the regeneration of the composite activated carbon filter element 210. The heating device 220 can be a stainless steel heating tube, electric heating wire, etc., and the preset temperature can be 50-100℃. The preset temperature can be adjusted according to the actual situation.

[0084] It should be noted that the water purification system may also include a temperature sensor, which is installed inside the composite activated carbon filter element 210 to detect the temperature inside the composite activated carbon filter element 210. This allows for real-time feedback of the temperature inside the composite activated carbon filter element 210. When the temperature inside the composite activated carbon filter element 210 is lower than the preset temperature, the heating device 220 heats the clean water inside the composite activated carbon filter element 210 to ensure that the temperature inside the composite activated carbon filter element 210 continuously meets the preset temperature.

[0085] It should be noted that the water purification system may also include a water level sensor, which is used to detect the water level inside the composite activated carbon filter element 210 so as to detect whether the clean water fills the entire composite activated carbon filter element 210 during the regeneration process.

[0086] In some embodiments, a water inlet valve 2401 is provided on the water inlet pipe 240, and a drive pump 2501 is provided on the water outlet pipe 250.

[0087] It should be noted that the inlet valve 2401 is used to control the opening and closing of the purified water inlet pipe 240, and the drive pump 2501 is used to provide power for the flow of water. The inlet valve 2401 can be a butterfly valve, gate valve, ball valve, etc., and the drive pump 2501 can be a centrifugal pump, axial flow pump, mixed flow pump, etc. This embodiment does not specifically limit the specific form of the inlet valve 2401 and the drive pump 2501.

[0088] In some embodiments, the reverse osmosis filtration assembly 30 includes a reverse osmosis membrane filter element 310 and a pure water inlet pipe 320; one end of the pure water inlet pipe 320 is connected to the reverse osmosis membrane filter element 310, and the other end of the pure water inlet pipe 320 is connected to the composite activated carbon filter element 210, wherein a check valve 3201 is provided on the pure water inlet pipe 320.

[0089] It should be noted that the reverse osmosis membrane filter element 310 is the core component of the water purifier, with extremely high purification precision. It is used to filter out all impurity molecules except water molecules. The check valve 3201 can prevent water in the pure water inlet pipe 320 from flowing back into the reverse osmosis filter assembly 30.

[0090] It should be noted that the composite activated carbon filter element 210 includes a pre-activated carbon filter element 2101 and a post-activated carbon filter element 2102. One end of the pure water inlet pipe 320 is connected to the reverse osmosis membrane filter element 310, and the other end of the pure water inlet pipe 320 is connected to the post-activated carbon filter element 2102. The post-activated carbon filter element 2102 is connected to the pure water outlet pipe 260.

[0091] In some embodiments, the water purification system includes a weighing device located at the bottom of the composite activated carbon filter element 210.

[0092] It should be noted that the weighing device is used to measure the weight of the composite activated carbon filter element 210 or the total weight of the bottle containing the composite activated carbon filter element 210. The weight of the composite activated carbon filter element 210 can be calibrated before leaving the factory to obtain the factory calibrated weight. Then, the weight of the composite activated carbon filter element 210 is monitored in real time during the use of the water purification system to obtain the real-time weight. During the use of the water purification system, the weight of the composite activated carbon filter element 210 will continuously increase due to the adsorption of a large number of impurities. When the real-time weight exceeds the preset weight difference of the factory calibrated weight, the regeneration program of the composite activated carbon filter element 210 can be started. The weighing device can be a weight sensor.

[0093] It should be noted that the water purification system may include a flow sensor, which may be installed on the purified water inlet pipe 240 or the pure water outlet pipe 260. The flow sensor can be used to detect the purified water volume of the water purification system. Since the amount of impurities and the proportion of various impurities contained in each liter of raw water are relatively fixed and can be measured before the water purification system leaves the factory, the adsorption capacity of the composite activated carbon filter element 210 can be calculated by measuring the purified water volume of the water purification system. When the adsorption capacity reaches the preset adsorption capacity, the regeneration program of the composite activated carbon filter element 210 is started.

[0094] In some embodiments, a wastewater valve 410 is provided on the wastewater pipeline 40, and a drain outlet is provided on the composite activated carbon filter element 210.

[0095] It should be noted that the wastewater valve 410 is used to control the opening and closing of the wastewater pipeline 40, and the drain outlet is used to discharge clean water containing adsorbate desorbed from the composite activated carbon filter element 210.

[0096] It should be noted that the above regeneration procedure is as follows: When the real-time weight exceeds the factory-calibrated weight by a preset weight difference, the inlet valve 2401 is opened via the control device, and cleaning water is injected into the composite activated carbon filter element 210 through the pretreatment filter element 10; and / or cleaning water is injected into the composite activated carbon filter element 210 through the pure water outlet pipe 260. Then, the water level detection device detects whether the cleaning water fills the composite activated carbon filter element 210. If the cleaning water fills the composite activated carbon filter element 210, the inlet valve 2401 is closed, and the heating device 220 is turned on to heat the cleaning water injected into the composite activated carbon filter element 210 to a preset temperature. At this time, the drive pump 2501, wastewater valve 410, and ultrasonic transducer 230 are also in the closed state. At this time, the composite activated carbon filter element 210 is immersed in hot water. Since adsorbent desorption is an endothermic reaction, soaking the composite activated carbon filter element 210 in hot water can effectively promote the precipitation of adsorbates on the composite activated carbon filter element 210. After the preset soaking time, the ultrasonic transducer 230 is turned on to desorb the adsorbates on the composite activated carbon filter element 210. The ultrasonic transducer 230 emits ultrasonic waves to cause ultrasonic cavitation effect in the cleaning water inside the composite activated carbon filter element 210. The high-pressure shock wave and high-speed micro-jet generated by the bursting of bubbles desorb the adsorbates on the composite activated carbon filter element 210, thereby regenerating the activated carbon filter element and extending its service life. After the preset transduction time, the cleaning water containing adsorbates is discharged. During the operation of the ultrasonic transducer 230, the inlet valve 2401, the pump, and the wastewater valve 410 are in the closed state.

[0097] In summary, the advantages of this embodiment are that by setting the heating device 220, the clean water injected into the composite activated carbon filter element 210 can be heated to a preset temperature. Soaking at the preset temperature allows the adsorbate on the composite activated carbon filter element 210 to precipitate. The ultrasonic transducer 230 can further desorb the composite activated carbon filter element 210 that has precipitated some adsorbate after soaking. This solves the problems of frequent replacement of activated carbon filter elements, low efficiency of activated carbon filter elements, material waste, and environmental pollution in existing water purification systems. It effectively improves the service life of activated carbon filter elements, facilitates the use of water purification systems, and reduces material waste and environmental pollution.

[0098] Example 4:

[0099] like Figure 3 As shown, this embodiment provides a method for regenerating activated carbon filter cartridges in a water purification system, including:

[0100] S101: Inject clean water into the composite activated carbon filter element 210;

[0101] In some embodiments, injecting cleaning water into the composite activated carbon filter element 210 includes: opening the water inlet valve 2401 and injecting cleaning water into the composite activated carbon filter element 210 through the pretreatment filter element 10; and / or injecting cleaning water into the composite activated carbon filter element 210 through the pure water outlet pipe 260.

[0102] It should be noted that when cleaning water is injected into the composite activated carbon filter element 210 through the pretreatment filter element 10, the cleaning water is purified water that has been filtered by the pretreatment filter element 10. At this time, the cleaning water contains fewer impurities, which is beneficial to the regeneration of activated carbon.

[0103] It should be noted that when injecting cleaning water into the composite activated carbon filter element 210, the wastewater valve 410 can be closed. At this time, the composite activated carbon filter element 210 can be quickly filled, the heating device 220 and the ultrasonic transducer can be turned off, and the water inlet valve 2401 can be opened to make the purified water inlet pipe 240 in a conductive state. If cleaning water is injected into the composite activated carbon filter element 210 through the pure water outlet pipe 260, the water inlet valve 2401 can be closed.

[0104] In some embodiments, injecting cleaning water into the composite activated carbon filter element 210 includes: detecting the weight of the composite activated carbon filter element 210 using a weighing device; if the weight of the composite activated carbon filter element 210 is greater than a preset weight, then injecting cleaning water into the composite activated carbon filter element 210.

[0105] It should be noted that injecting clean water into the composite activated carbon filter element 210 is the first step of the entire regeneration method. Before injecting clean water into the composite activated carbon filter element 210, a trigger condition is required to start the activated carbon filter element regeneration method of the water purification system. In this embodiment, the decision to start the activated carbon filter element regeneration method / program can be determined by detecting the weight of the composite activated carbon filter element 210. The weight of the composite activated carbon filter element 210 can be calibrated before leaving the factory to obtain the factory calibrated weight. Then, the weight of the composite activated carbon filter element 210 can be monitored in real time during the use of the water purification system to obtain the real-time weight. During the use of the water purification system, the weight of the composite activated carbon filter element 210 will continuously increase due to the adsorption of a large number of impurities. When the real-time weight is greater than the factory calibrated weight by a preset weight difference, the regeneration program of the composite activated carbon filter element 210 can be started.

[0106] It should be noted that the water purification system may include a flow sensor, which may be installed on the purified water inlet pipe 240 or the pure water outlet pipe 260. The flow sensor can be used to detect the purified water volume of the water purification system. Since the amount of impurities and the proportion of various impurities contained in each liter of raw water are relatively fixed and can be measured before the water purification system leaves the factory, the adsorption capacity of the composite activated carbon filter element 210 can be calculated by measuring the purified water volume of the water purification system. When the adsorption capacity reaches the preset adsorption capacity, the regeneration program of the composite activated carbon filter element 210 is started.

[0107] S102: The cleaning water injected into the composite activated carbon filter element 210 is heated to a preset temperature by the heating device 220;

[0108] It should be noted that when the cleaning water injected into the composite activated carbon filter element 210 is heated to a preset temperature by the heating device 220, the drive pump 2501, wastewater valve 410 and ultrasonic transducer 230 are in the closed state. At this time, the composite activated carbon filter element 210 is soaked in hot water. Since adsorbent desorption is an endothermic reaction, allowing the composite activated carbon filter element 210 to stand and soak in hot water can effectively promote the precipitation of adsorbate on the composite activated carbon filter element 210.

[0109] In some embodiments, heating the cleaning water injected into the composite activated carbon filter element 210 to a preset temperature via the heating device 220 includes: detecting whether the cleaning water fills the composite activated carbon filter element 210 via a water level detection device; if the cleaning water fills the composite activated carbon filter element 210, then closing the water inlet valve 2401 and turning on the heating device 220 to heat the cleaning water injected into the composite activated carbon filter element 210 to the preset temperature.

[0110] It should be noted that the water level detection device can ensure that the composite activated carbon filter element 210 is filled with cleaning water. If the composite activated carbon filter element 210 is not filled with cleaning water, it will not be able to fully soak the entire composite activated carbon filter element 210 during static soaking, which will lead to poor activated carbon regeneration effect.

[0111] It should be noted that the water purification system may also include a temperature sensor, which is installed inside the composite activated carbon filter element 210 to detect the temperature inside the composite activated carbon filter element 210, so as to provide real-time feedback on the temperature inside the composite activated carbon filter element 210. When the temperature inside the composite activated carbon filter element 210 is lower than the preset temperature, the heating device 220 heats the clean water inside the composite activated carbon filter element 210 to ensure that the temperature inside the composite activated carbon filter element 210 continuously meets the preset temperature. The preset temperature can be 50-100℃ and can be adjusted according to the actual situation. The water level detection device can be a water level sensor.

[0112] S103: The composite activated carbon filter element 210 is left to stand at the preset temperature for a preset soaking time;

[0113] It should be noted that the preset soaking time can be adjusted according to the adsorption capacity and shape of the composite activated carbon filter element 210. If the adsorption capacity of the composite activated carbon filter element 210 is large and the surface area is small, the preset soaking time can be appropriately increased; if the adsorption capacity of the composite activated carbon filter element 210 is small and the surface area is large, the preset soaking time can be appropriately decreased.

[0114] S104: After the preset soaking time, turn on the ultrasonic transducer 230 to desorb the adsorbate on the composite activated carbon filter element 210.

[0115] It should be noted that when the ultrasonic transducer 230 is turned on to desorb the adsorbate on the composite activated carbon filter element 210, the inlet valve 2401, the drive pump 2501, and the wastewater valve 410 can be closed. At this time, the composite activated carbon filter element 210 is equivalent to being in a closed space for ultrasonic action. The ultrasonic transducer 230 emits ultrasonic waves to cause ultrasonic cavitation effect in the cleaning water inside the composite activated carbon filter element 210. The high-pressure shock wave generated by the bursting of bubbles forms a high-speed micro-jet to desorb the adsorbate on the composite activated carbon filter element 210, thereby regenerating the activated carbon filter element and improving its service life.

[0116] It should be noted that the action time of the ultrasonic transducer 230 can be adjusted as needed. If the adsorption capacity of the composite activated carbon filter element 210 is large and the surface area is small, the action time of the ultrasonic transducer 230 can be appropriately increased; if the adsorption capacity of the composite activated carbon filter element 210 is small and the surface area is large, the action time of the ultrasonic transducer 230 can be appropriately decreased.

[0117] S105: After the preset transduction time, the cleaning water containing the adsorbate is discharged.

[0118] It should be noted that the discharge of the cleaning water containing the adsorbate may include: discharging the cleaning water containing the adsorbate through the wastewater pipeline 40, or discharging it through the drain port provided on the composite activated carbon filter element 210.

[0119] It should be noted that after the cleaning water containing the adsorbate is discharged, the weight of the composite activated carbon filter element 210 can be detected. The weight of the composite activated carbon filter element 210 after the regeneration process is compared with the preset weight of the composite activated carbon filter element 210. If the difference between the weight of the composite activated carbon filter element 210 after the regeneration process and the preset weight of the composite activated carbon filter element 210 is less than the regeneration difference, then the regeneration process of the composite activated carbon filter element 210 is successful. If the difference between the weight of the composite activated carbon filter element 210 after the regeneration process and the preset weight of the composite activated carbon filter element 210 is greater than or equal to the regeneration difference, then the regeneration process of the composite activated carbon filter element 210 fails and needs to be repeated.

[0120] In summary, the advantages of this embodiment are that by injecting clean water into the composite activated carbon filter element 210; heating the clean water injected into the composite activated carbon filter element 210 to a preset temperature using a heating device 220; allowing the composite activated carbon filter element 210 to stand at the preset temperature for a preset soaking time; after the preset soaking time, turning on the ultrasonic transducer 230 to desorb the adsorbate on the composite activated carbon filter element 210; and after the preset transducer time, discharging the clean water containing the adsorbate, the problem of frequent replacement of activated carbon filter elements, low efficiency of activated carbon filter elements, material waste, and environmental pollution in existing water purification systems can be solved. This effectively improves the service life of activated carbon filter elements, facilitates the use of water purification systems, and reduces material waste and environmental pollution.

[0121] Although the invention has been described with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A water purification system, characterized in that, include: The pretreatment filter element is connected to the raw water pipeline; A composite filtration assembly includes a composite activated carbon filter element, which is connected to the pretreatment filter element. as well as The reverse osmosis filtration assembly is connected to the composite activated carbon filter element and the wastewater pipeline. The composite activated carbon filter element is equipped with a heating device and an ultrasonic transducer. During regeneration, the heating device and the ultrasonic transducer are used to desorb the adsorbate on the composite activated carbon filter element. The heating device heats the cleaning water injected into the composite activated carbon filter to a preset temperature, and soaks it at the preset temperature for a preset time to allow the adsorbate on the composite activated carbon filter to precipitate. The ultrasonic transducer further desorbs the composite activated carbon filter that has precipitated some adsorbate after soaking. The water purification system includes a weighing device located at the bottom of the composite activated carbon filter element. The weighing device is used to measure the weight of the composite activated carbon filter element. When the weight of the composite activated carbon filter element is greater than a preset weight, the regeneration process of the composite activated carbon filter element is started. Alternatively, the water purification system includes a flow sensor for detecting the amount of purified water in the system, calculating the adsorption capacity of the composite activated carbon filter element based on the amount of purified water, and initiating a regeneration process for the composite activated carbon filter element when the adsorption capacity reaches a preset adsorption capacity. The regeneration process includes: injecting cleaning water into the composite activated carbon filter element; detecting whether the cleaning water fills the composite activated carbon filter element using a water level detection device; if the cleaning water fills the composite activated carbon filter element, turning on the heating device to heat the cleaning water injected into the composite activated carbon filter element to a preset temperature; at this time, the ultrasonic transducer is in the off state; the composite activated carbon filter element is soaked in hot water; after a preset soaking time, the ultrasonic transducer is turned on to desorb the adsorbate on the composite activated carbon filter element.

2. The water purification system according to claim 1, characterized in that, The composite filtration assembly includes a purified water inlet pipe, a purified water outlet pipe, and a pure water outlet pipe; One end of the purified water inlet pipe is connected to the pretreatment filter element, the other end of the purified water inlet pipe is connected to the composite activated carbon filter element, one end of the purified water outlet pipe is connected to the composite activated carbon filter element, and the other end of the purified water outlet pipe is connected to the reverse osmosis filtration assembly.

3. The water purification system according to claim 2, characterized in that, The purified water inlet pipe is equipped with an inlet valve, and the purified water outlet pipe is equipped with a drive pump.

4. The water purification system according to claim 1, characterized in that, The reverse osmosis filtration assembly includes a reverse osmosis membrane filter element and a pure water inlet pipe; One end of the pure water inlet pipe is connected to the reverse osmosis membrane filter element, and the other end of the pure water inlet pipe is connected to the composite activated carbon filter element. A check valve is provided on the pure water inlet pipe.

5. The water purification system according to any one of claims 1-4, characterized in that, The wastewater pipeline is equipped with a wastewater valve, and the composite activated carbon filter element is equipped with a drain port.

6. A method for regenerating activated carbon filter cartridges in a water purification system, applied to the water purification system as described in any one of claims 1-5, characterized in that, include: The activated carbon filter regeneration method of the water purification system is initiated according to triggering conditions, the triggering conditions including: The weight of the composite activated carbon filter element is detected by a weighing device; If the weight of the composite activated carbon filter element is greater than the preset weight, then cleaning water is injected into the composite activated carbon filter element. Alternatively, the amount of purified water from the water purification system can be detected using a flow sensor. The adsorption capacity of the composite activated carbon filter element is calculated based on the amount of purified water. If the adsorption amount reaches the preset adsorption amount, clean water is injected into the composite activated carbon filter element; The cleaning water injected into the composite activated carbon filter element is heated to a preset temperature using a heating device. The composite activated carbon filter element is left to stand at the preset temperature for a preset soaking time; After the preset soaking time, the ultrasonic transducer is turned on to desorb the adsorbate on the composite activated carbon filter element; After the preset energy exchange time, the cleaning water containing the adsorbate is discharged.

7. The method for regenerating activated carbon filter cartridges in a water purification system according to claim 6, characterized in that, The process of injecting cleaning water into the composite activated carbon filter element includes: Open the inlet valve and inject clean water into the composite activated carbon filter element through the pretreatment filter element; and / or Clean water is injected into the composite activated carbon filter element through the pure water outlet pipe.

8. The method for regenerating activated carbon filter cartridges in a water purification system according to claim 6, characterized in that, The step of heating the cleaning water injected into the composite activated carbon filter element to a preset temperature via a heating device includes: The water level detection device is used to detect whether the composite activated carbon filter element is filled with the cleaning water. If the composite activated carbon filter element is filled with the cleaning water, then the inlet valve is closed and the heating device is turned on to heat the cleaning water injected into the composite activated carbon filter element to a preset temperature.

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