Water purifying and water feeding apparatus for recreational vehicle

Abstract

The application relates to the technical field of water filtration. A water purifying and water feeding apparatus for a recreational vehicle comprises a water hose connector, a water pump, a coarse filtration assembly, a fine filtration assembly and a clean water tank. The water hose connector is detachably connected to a water receiving hose, and the other end of the water receiving hose is provided with a filtration assembly. The water pump is connected to the coarse filtration assembly, the coarse filtration assembly is connected to the fine filtration assembly, and the fine filtration assembly is connected to the clean water tank. In the present invention, by means of course filtration of a ceramic filter element, and fine filtration composed of PP cotton, activated carbon, a cation exchange resin and an electric crystal film, a natural water source is converted into domestic water meeting NSF standards, which addresses the need for water replenishment using a natural water source in the wild during traveling by a recreational vehicle. The use experience of drivers and passengers is greatly improved, also, the ceramic filter element being cleanable and reusable allows the service life of a fine filtration element to be prolonged, and the use cost of filtered natural water to be reduced.

Description

A water purification and supply device for RV Technical Field

[0001] The utility model relates to the technical field of water filtration, in particular to a drinking water filtration and purification technology. Background Art

[0002] With the diversification of travel options, RV self-drive is becoming an increasingly popular travel method. However, due to space constraints, RVs often lack large water tanks. During travel, daily water needs such as washing vegetables and bathing often quickly deplete the onboard water, directly impacting the driver and passengers' experience. Currently, domestic RV facilities are underdeveloped. RV refilling options are limited, with limited access to highway service areas, a few RV campgrounds, and designated RV areas in scenic parks.

[0003] During travel, the chances of an RV coming into close contact with natural water sources are still very high, but there are many difficulties in converting natural water into domestic water, because natural water sources contain a large number of fine particles, which often carry a negative charge. Like charges repel each other, forming a suspended state that is difficult to precipitate and filter. Industrial treatment is to add coagulants for adsorption, filter after precipitation, and finally add chlorine for disinfection. This treatment process is time-consuming and labor-intensive, and this process cannot be applied to RVs that use natural water sources for water replenishment.

[0004] Therefore, how to use natural water sources to conveniently replenish water during RV travel is an urgent problem that needs to be solved.

[0005] Summary of the Invention

[0006] The purpose of the present invention is to provide a water purification and supply device for a recreational vehicle to solve the above technical problems.

[0007] The technical problem solved by the present invention can be achieved by adopting the following technical solutions: a recreational vehicle water purification and supply device has a casing, which is placed on the recreational vehicle, and is characterized in that it also includes: an external water source component, a water pump, a coarse filter component and a fine filter component; the external water source component includes a soft water pipe and a water inlet filter structure, the water inlet filter structure is installed at one end of the water inlet of the soft water pipe, and the water outlet is detachably connected to the water inlet of the water pump; a water pump is provided in the casing, and the coarse filter component and the fine filter component are detachably connected to the outside of the casing; the water pump is connected to the coarse filter component, the coarse filter component is connected to the fine filter component, and the fine filter component is connected to the outlet pipe; the filtration accuracy of the fine filter component is higher than that of the coarse filter component.

[0008] There are serious pollutants in natural water sources, including but not limited to: leaves, red worms, eggs, algae, suspended particulate matter, viruses, microorganisms, heavy metal ions and other impurities. The filtration of these impurities seriously affects the service life of the filter material. Therefore, the filtration of water sources needs to be divided into coarse filtration and fine filtration. Coarse filtration materials are low in cost and can be used repeatedly; fine filtration materials are high in cost, but the filtration effect can filter natural water sources to the NSF drinking water safety and health standards.

[0009] Furthermore, the coarse filtration component includes two groups of filter elements, a coarse pre-filter and a coarse post-filter; the coarse pre-filter is a filter element composed of a hollow filter rod sintered from a ceramic material with a standard filtration accuracy of 10μm; the coarse post-filter is a filter element composed of a hollow filter rod sintered from a ceramic material with a standard filtration accuracy of 3μm; the ceramic filter rod is detachably installed in the filter element, with both ends sealed, and the water to be treated enters the internal space from the outer wall of the filter rod through the inner wall of the filter rod to obtain treated water.

[0010] By using ceramic filter rods for two-stage coarse filtration, on the one hand, it can preliminarily filter out insect eggs, algae, and large suspended solids in natural water sources to reduce the burden on the fine filter element group and increase the service life of the fine filter element group; on the other hand, both stages of coarse filtration can be cleaned and reused, thus reducing the cost of use.

[0011] Furthermore, the fine filtration component includes three groups of filter elements: pre-fine filter, mid-fine filter and post-fine filter, all of which are encapsulated in a filter element structure; the pre-fine filter is a filter element composed of a hollow activated carbon rod and PP cotton wrapped around the activated carbon rod; the mid-fine filter is a filter element composed of a cation exchange resin; the post-fine filter is a filter element composed of a hollow activated carbon rod and a crystal membrane tube arranged around the activated carbon rod.

[0012] On the one hand, fine filtration can achieve a filtration capacity of less than 0.02μm, which can effectively remove impurities such as viruses, bacteria and heavy metal ions. On the other hand, fine filtration filter elements are made of materials with large flow and low pressure drop, which improves the conversion efficiency of natural water into domestic water.

[0013] Furthermore, the filter element structure includes: a filter element tube, a filter element cover and a filter element housing; the filter element housing is cylindrical, open on one side and closed on the other side, and the closed side has a convex groove handle for facilitating the removal and installation of the filter element; the filter element cover has an upwardly formed boss at the center, a water outlet hole is opened in the center of the boss, and a number of water inlet holes are opened around the boss; the filter element tube is a hollow long tube, which is arranged between the filter element cover and the filter element housing; a pressure plate is provided near the filter element cover of the filter element tube, the outer diameter of the pressure plate is 0.5mm~1mm smaller than the inner diameter of the filter element housing, and a number of water holes are provided on the edge of the pressure plate; a support platform is provided on the pipe wall of the pressure plate facing the filter element cover; the pressure plate is a water-permeable pipe on the side facing the filter element housing, the bottom of the water-permeable pipe is closed by the filter element housing, and a number of water-permeable openings are opened on the pipe wall of the water-permeable pipe.

[0014] The filter element is designed with water inlet and outlet on the same side, and the boss and outlet are both circular. This design does not require consideration of the docking of the water inlet and outlet on the filter element with the water inlet and outlet on the slot base. It only requires consideration of the issue of fixing the filter element in the slot, which is conducive to the installation and removal of the filter element in the slot.

[0015] Furthermore, the filter element tube is arranged in the filter element housing, and the central axes of the two coincide with each other; the outlet pipe hole of the filter element cover passes through the outlet pipe of the filter element tube and is buckled on the filter element housing, the central axes of the filter element cover and the filter element housing coincide with each other, and the filter element cover and the filter element housing are detachably connected; the filter element cover is buckled on the support platform of the filter element tube; the water to be filtered enters from the water inlet hole of the filter element cover, flows along the filter element tube pressure plate to the water hole set at the edge of the pressure plate, enters the filtration area of ​​the filter element housing space through the water hole, and the filtered treated water flows out from the water outlet of the filter element tube through the water permeable port on the wall of the permeable pipe.

[0016] A filtration path is formed between the filter cover, filter tube and filter housing, in which water enters from the same side, is distributed to the surrounding areas, then converges to the central water pipe, and finally flows out from the same side.

[0017] Furthermore, the PP cotton in the pre-fine filter adopts a material with a filtration range of 1μm, and the activated carbon rod adopts a material with a mesh size of 100-300; one end of the activated carbon rod and the PP cotton is closed by the filter element housing, and the other end is closed by the pressure plate of the filter element tube, and the inner diameter of the activated carbon rod is larger than the outer diameter of the water permeable tube of the filter element tube.

[0018] The PP cotton in the pre-fine filter is mainly used to filter tiny particles of impurities with a diameter greater than 1μm in the water, playing a filtering and sharing role; activated carbon is used to adsorb viruses, microorganisms, colloids, heavy metal pollutants and organic matter.

[0019] Furthermore, the cation exchange resin in the fine filter is a short fiber structure, and is selected to have a fineness of 1.2 dtex, a fiber length of 38 mm, and an ion exchange fiber specific surface area greater than or equal to 60 m 2 / g, the specific surface area of ​​cation exchange fiber is greater than or equal to 63m 2 / g, a cation exchange resin of this specification; the cation exchange resin is configured as a hollow tube, one end of which is closed by the filter element housing and the other end is closed by the pressure plate of the filter element tube, and the inner diameter of the hollow tube is larger than the outer diameter of the water permeable tube of the filter element tube.

[0020] The use of cation exchange resin, through adsorption, exchange, filtration and other structures, can effectively remove heavy metal ions, fluoride, nitrate and other substances in water.

[0021] Furthermore, the crystal membrane tube in the post-fine filter is a hollow tube surrounded by a crystal membrane; the inner wall of the crystal membrane tube and the filter element housing is provided with a gap greater than 0.3mm and less than 1.5mm; the crystal membrane is made of a material with a filtration accuracy of 2μm and a retention accuracy of 0.02μm; the activated carbon rod is made of a material with a mesh size of 100 to 300; one end of the activated carbon rod and the crystal membrane tube is closed by the filter element housing, and the other end is closed by the pressure plate of the filter element tube, and the inner diameter of the activated carbon rod is larger than the outer diameter of the water permeable tube of the filter element tube.

[0022] When the crystal membrane is immersed in water, an "electrode" forms on its surface. The mineral crystal structure attached to the fiber surface generates a natural AL+++ electromotive force, creating a positive voltage of 53 microvolts. Much like the north and south poles of a magnet, their proximity creates an attractive force. The crystal membrane uses its electrical charge to absorb organic, inorganic, and pathogenic pollutants. This positive charge not only directly inhibits the growth of viruses and bacteria but also possesses the ability to actively capture and superimpose adsorption. When harmful substances in the water approach the crystal membrane, they are actively adsorbed. These adsorbed impurities, through charge conduction, become new, outward-expanding adsorbates, further filtering out harmful substances in the water. Therefore, the crystal membrane offers the dual advantages of high flux and high removal capacity.

[0023] Activated carbon rods are added after the electrocrystalline membrane tubes for filtration, the main function of which is to remove discoloration and odor in the water and improve the taste of the output water.

[0024] Furthermore, there is a clean water tank, the outlet water pipe is fixedly connected to the clean water tank, the clean water tank is provided with an ultraviolet lamp, and the ultraviolet lamp is arranged on the top of the clean water tank; the water pump adopts a flow rate of 3m 3 / h~6.5m 3 / h, a water supply pump with a lift greater than 5m; the soft water pipe has a length ranging from 5m to 100m; the water inlet filtering structure is a tubular plastic mesh cover.

[0025] After the natural water source is filtered, it is stored in a clean water tank. In order to prevent bacteria from growing in the clean water tank, ultraviolet light is used to disinfect and sterilize it.

[0026] During the natural water source filtration process, both physical filtration and chemical adsorption of materials require a certain amount of processing time. Therefore, when using natural water sources for water supply, the water flow rate should be appropriately reduced to prevent excessive water pressure from damaging the material structure. The length of the soft water pipe used for water inlet should be determined according to actual needs, and the tubular plastic mesh cover is used to filter impurities visible to the naked eye in natural water sources, such as leaves, aquatic plants, red worms, etc.

[0027] Furthermore, a water pipe interface is fixedly provided on the casing, the water pipe interface is fixedly connected to the water pump, and one end of the water outlet of the soft water pipe is detachably connected to the water pipe interface.

[0028] According to the usage, you can easily switch to soft water hoses of different lengths.

[0029] Using natural water sources to replenish RV fresh water tanks is often considered impure, resulting in extremely short filter lifespans and low economic efficiency, making it virtually unfeasible. The inventors of this invention have overcome the technical prejudice against natural water filtration by creatively utilizing the high filtration capacity and high water flow rate of ceramic filter elements, as well as their washable and reusable properties, to reduce impurities to an acceptable level before fine filtration.

[0030] The inventors of this invention have achieved the conversion of natural water sources into domestic water that meets NSF requirements through coarse filtration of ceramic filter elements and fine filtration composed of PP cotton, activated carbon, cation exchange resin, and electrocrystalline membrane. This perfectly solves the need to use natural water sources to replenish RV water in the wild during RV travel, greatly improving the driving experience of drivers and passengers. At the same time, the washable and reusable characteristics of the ceramic filter element increase the service life of the fine filtration filter element group and reduce the cost of filtering natural water. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0032] Figure 1 is a schematic structural diagram of a water purification and water supply device for a recreational vehicle according to the present invention;

[0033] FIG2 is a front view of the water purification and water supply device for a recreational vehicle according to the present invention;

[0034] Figure 3 is a cross-sectional view of the filter element assembly structure;

[0035] Figure 4 is a schematic diagram of the filter tube structure;

[0036] Figure 5 is a schematic diagram of the filter cover structure;

[0037] Figure 6 is a schematic diagram of the filter element waterway;

[0038] Figure 7 is a cross-sectional view of the structure of the pre-filter element;

[0039] Figure 8 is a cross-sectional view of the post-filter structure;

[0040] The same or similar reference numerals in the drawings represent the same or similar components.

[0041] Explanation of symbols: 1. Water pipe interface; 2. Pipe water source interface; 3. Water pump; 4. Coarse pre-filter; 5. Coarse post-filter; 6. Fine pre-filter; 7. Fine mid-filter; 8. Fine post-filter; 9. Clean water tank; 11. Filter element tube; 12. Filter element cover; 13. Filter element housing; 111. Water outlet; 112. Water permeable pipe; 113. Pressing plate; 114. Support platform; 115. Water hole; 116. Water outlet pipe; 121. Water inlet hole; 122. Water outlet pipe hole; 131. PP cotton; 132. Activated carbon rod; 133. Crystal membrane tube; 200. Casing. DETAILED DESCRIPTION

[0042] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to the accompanying drawings.

[0043] The detailed description of the embodiments of this application is for illustration, not for limiting the scope of protection claimed. The specific details of the various specific system structures and technologies proposed are intended to help understand the embodiments of this application. Based on the embodiments of this application, it should be clear to those skilled in the art that all other embodiments obtained without creative work are within the scope of protection of this application.

[0044] It will be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0045] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0046] Referring to Figures 1 and 2, the RV water purification and supply device has a casing 200, which is placed on the RV and is characterized in that it also includes: an external water source component, a water pump 3, a coarse filter component and a fine filter component; the external water source component includes a soft water pipe and a water inlet filter structure, and the water inlet filter structure is installed at one end of the water inlet of the soft water pipe, and the water outlet 111 is detachably connected to the water inlet of the water pump 3; a water pump 3 is provided in the casing 200, and the coarse filter component and the fine filter component are detachably connected to the outside of the casing 200; the water pump 3 is connected to the coarse filter component, the coarse filter component is connected to the fine filter component, and the fine filter component is connected to the outlet pipe; the filtration accuracy of the fine filter component is higher than that of the coarse filter component.

[0047] In this example, conventional pipe water replenishment is still carried out through the pipe water source interface 2, and the pipe water source interface 2 is fixedly connected to the clean water tank 9.

[0048] In this embodiment, the soft water pipe can be made of PVC or PB plastic, and preferably, a mesh-reinforced hose can be used.

[0049] In addition to visible impurities, natural water sources also contain, but are not limited to, tiny impurities such as insect eggs, algae, suspended solids, viruses, microorganisms, and heavy metal ions. Filtering these impurities can severely impact the lifespan of the filter material, so water filtration is divided into two stages: coarse filtration and fine filtration. The coarse filtration stage utilizes physical interception, requiring long-life, low-cost rapid filtration of impurities larger than 3μm. Fine impurities smaller than 3μm, such as viruses, bacteria, and heavy metal ions, are filtered, exchanged, and adsorbed by fine filtration.

[0050] Furthermore, the coarse filtration component includes two groups of filter elements, a coarse pre-filter 4 and a coarse post-filter 5; the coarse pre-filter 4 is a filter element composed of a hollow filter rod sintered from a ceramic material with a standard filtration accuracy of 10 μm; the coarse post-filter 5 is a filter element composed of a hollow filter rod sintered from a ceramic material with a standard filtration accuracy of 3 μm; the ceramic filter rod is detachably installed in the filter element, with both ends sealed, and the water to be treated enters the internal space from the outer wall of the filter rod through the inner wall of the filter rod to obtain treated water.

[0051] Ceramic filter elements typically utilize high-temperature sintered ceramic particles with high crystallinity and uniform pore distribution. They are available in a wide range of materials, including quartz, aluminosilicate, fine ceramic, and diatomaceous earth. Ceramic filter elements have the advantages of large outer pores and small inner pores. Under the action of hydraulic pressure, impurities in the treated water are intercepted by the large pores, while fine particles are trapped by the inner diameter of the ceramic filter element. They offer a long service life, are recyclable, and filter large amounts of water. Therefore, they are selected in this embodiment for use as a coarse filter element, filtering insect eggs, algae, and large suspended solids from natural water sources. This reduces the burden on the fine filter element assembly and increases its service life.

[0052] The coarse pre-filter 4 uses a basic ceramic filter element with a relatively large filtration pore size. It can filter out impurities in the water as much as possible under the premise of large flow, but it takes relatively more time to clean; the coarse post-filter 5 uses a fiber ceramic filter element. Compared with the basic ceramic filter element, the fiber ceramic filter element has a finer filtration pore size, is more durable and easier to clean.

[0053] In this embodiment, the coarse filtration adopts two stages, front and back. It is further preferred that the coarse filtration can continue to increase the filter element to improve the coarse filtration accuracy, such as the double-control membrane ceramic filter element, the accuracy of which has reached 0.1μm, or even higher.

[0054] Furthermore, the fine filtration component includes three groups of filter elements: a pre-fine filter 6, a mid-fine filter 7 and a post-fine filter 8, all of which are encapsulated in a filter element structure; the pre-fine filter 6 is a filter element composed of a hollow activated carbon rod 132 and PP cotton 131 wrapped around the activated carbon rod 132; the mid-fine filter 7 is a filter element composed of a cation exchange resin; the post-fine filter 8 is a filter element composed of a hollow activated carbon rod 132 and a crystal membrane tube 133 arranged around the activated carbon rod 132.

[0055] After the treated water is coarsely filtered, the remaining impurity particles have an accuracy of less than 3μm. The remaining impurities are basically viruses, bacteria, organic matter, colloids and various heavy metal ions, with a minimum accuracy of about 0.5nm. If you rely solely on physical filtration, such as RO reverse osmosis membrane filtration with an accuracy of 0.1nm, the water output will be too slow and concentrated sewage will need to be treated.

[0056] Therefore, fine filtration does not insist on reaching the nano-level filtration accuracy, and the reasonable accuracy is set at 0.02μm. This accuracy can basically filter out viruses and bacteria, and the remaining organic matter, colloids and various heavy metal ions are retained through the exchange and adsorption of fine filtration materials.

[0057] The PP cotton 131, activated carbon, cation exchange resin and electrocrystalline membrane used in the fine filtration group all have the characteristics of low pressure drop and large flux, which is suitable for the working scenario of water purification near the water in the RV.

[0058] As shown in Figures 3, 4 and 5, the filter element structure further comprises: a filter element tube 11, a filter element cover 12 and a filter element housing 13; the filter element housing 13 is cylindrical, with one side open and the other side closed, and the closed side has a convex groove handle for facilitating the removal and installation of the filter element; the filter element cover 12 has an upwardly formed boss at the center, a water outlet hole 122 is opened in the center of the boss, and a plurality of water inlet holes 121 are opened around the boss; the filter element tube 11 is a hollow long tube, which is placed in the filter element Between the cover 12 and the filter element housing 13; the filter element tube 11 is provided with a pressure plate 113 near the filter element cover 12, the outer diameter of the pressure plate 113 is 0.5mm~1mm smaller than the inner diameter of the filter element housing 13, and a plurality of water holes 115 are provided on the edge of the pressure plate 113; the pressure plate 113 is provided with a support platform 114 on the side of the tube facing the filter element cover 12; the pressure plate 113 is a water-permeable tube on the side facing the filter element housing 13, the bottom of the water-permeable tube is closed by the filter element housing 13, and a plurality of water-permeable openings are opened on the tube wall of the water-permeable tube.

[0059] The filter element is designed to have water inlet and outlet on the same side, and the boss and water outlet 111 are both circular. This design does not require consideration of the docking of the water inlet and outlet 111 on the filter element and the water inlet and outlet 111 on the slot base. It only requires consideration of the issue of fixing the filter element in the slot, which is conducive to the installation and removal of the filter element in the slot.

[0060] As shown in Figure 6, further, the filter element tube 11 is arranged in the filter element housing 13, and the central axes of the two coincide; the outlet pipe hole 122 of the filter element cover 12 passes through the outlet pipe 116 of the filter element tube 11 and is snapped onto the filter element housing 13, the central axes of the filter element cover 12 and the filter element housing 13 coincide, and the filter element cover 12 and the filter element housing 13 are detachably connected; the filter element cover 12 is buckled on the support platform 114 of the filter element tube 11; the water to be filtered enters from the water inlet hole 121 of the filter element cover 12, flows along the pressure plate 113 of the filter element tube 11 to the water hole 115 set at the edge of the pressure plate 113, enters the filtration area of ​​the space of the filter element housing 13 through the water hole 115, and the filtered treated water flows out from the water outlet 111 of the filter element tube 11 through the water permeable port on the wall of the permeable pipe.

[0061] After the filter cover 12, filter tube 1111 and filter housing 13 are assembled, a water path is formed in which water enters from the water inlet, is diverted by the pressure plate 113 to the periphery of the filter housing 13, and then reaches the inner edge of the filter housing 13 from the water hole 115 of the pressure plate 113. Under the action of water pressure, the water passes through the wall of the filter material and converges to the central permeable pipe 112, and finally flows out from the water outlet 111, completing a filtration process.

[0062] The filter element cover 12 and the filter element housing 13 are detachably connected, and in this embodiment are threadedly connected, so as to facilitate the replacement of the filter element whose filter life has expired.

[0063] As shown in Figure 7, further, the PP cotton 131 in the pre-fine filter 6 adopts a material with a filtration range of 1 μm, and the activated carbon rod 132 adopts a material with a mesh size of 100 to 300; one end of the activated carbon rod 132 and the PP cotton 131 is closed by the filter element housing 13, and the other end is closed by the pressure plate 113 of the filter element tube 11, and the inner diameter of the activated carbon rod 132 is larger than the outer diameter of the water permeable pipe of the filter element tube 11.

[0064] The PP cotton 131 in the pre-filter 6 is mainly used to filter tiny particles of impurities with a diameter greater than 1 μm in the water, playing a filtering and sharing role; the activated carbon is used to adsorb viruses, microorganisms, colloids, heavy metal pollutants and organic matter.

[0065] Furthermore, the cation exchange resin in the fine filter 7 is a short fiber structure, and is selected to have a fineness of 1.2 dtex, a fiber length of 38 mm, and an ion exchange fiber specific surface area greater than or equal to 60 m 2 / g, the specific surface area of ​​cation exchange fiber is greater than or equal to 63m 2 / g, a cation exchange resin of this specification; the cation exchange resin is configured as a hollow tubular, one end of which is closed by the filter housing 13 and the other end is closed by the pressure plate 113 of the filter tube 11, and the inner diameter of the hollow tubular is larger than the outer diameter of the water-permeable tube of the filter tube 11.

[0066] The use of cation exchange resin, through adsorption, exchange, filtration and other structures, can effectively remove heavy metal ions, fluoride, nitrate and other substances in water.

[0067] The cation exchange resin in this example is appropriately added with a food-grade adhesive and is wrapped with a non-woven fabric to form a cylindrical core.

[0068] As shown in Figure 8, further, the crystal membrane tube 133 in the fine filter 8 is a hollow tube surrounded by a crystal membrane; the inner wall of the crystal membrane tube 133 and the filter element housing 13 is provided with a gap greater than 0.3mm and less than 1.5mm; the crystal membrane is made of a material with a filtration accuracy of 2μm and a retention accuracy of 0.02μm; the activated carbon rod 132 is made of a material with a mesh size of 100-300; one end of the activated carbon rod 132 and the crystal membrane tube 133 is closed by the filter element housing 13, and the other end is closed by the pressure plate 113 of the filter element tube 11, and the inner diameter of the activated carbon rod 132 is larger than the outer diameter of the water-permeable pipe of the filter element tube 11.

[0069] When the crystal membrane is immersed in water, an "electrode" forms on its surface. The mineral crystal structure attached to the fiber surface generates a natural AL+++ electromotive force, creating a positive voltage of 53 microvolts. Much like the north and south poles of a magnet, their proximity creates an attractive force. The crystal membrane uses its electrical charge to absorb organic, inorganic, and pathogenic pollutants. This positive charge not only directly inhibits the growth of viruses and bacteria but also possesses the ability to actively capture and superimpose adsorption. When harmful substances in the water approach the crystal membrane, they are actively adsorbed. These adsorbed impurities, through charge conduction, become new, outward-expanding adsorbates, further filtering out harmful substances in the water. Therefore, the crystal membrane offers the dual advantages of high flux and high removal capacity.

[0070] An activated carbon rod is added after the crystal membrane tube 133 for filtration, the main function of which is to remove the foreign color and odor in the water and improve the taste of the water.

[0071] Furthermore, there is a clean water tank 9, the outlet water pipe is fixedly connected to the clean water tank 9, the clean water tank 9 is provided with an ultraviolet lamp, and the ultraviolet lamp is arranged on the top of the clean water tank 9; the water pump 3 adopts a flow rate of 3m 3 / h~6.5m 3 / h, a water supply pump 3 with a head greater than 5m; the soft water pipe has a length ranging from 5m to 100m; the water inlet filter structure is a tubular plastic mesh cover.

[0072] After the natural water source is filtered, it is stored in the clean water tank 9. In order to prevent bacteria from growing in the clean water tank 9, ultraviolet light is used to disinfect and sterilize the water.

[0073] The filtration, exchange and adsorption of fine filtration require sufficient contact time between the water to be treated and the filter element material. Therefore, during the filtration process of natural water sources, the water flux cannot be too fast or too much, and a certain processing time must be maintained for physical filtration and chemical adsorption of the material. Therefore, when using natural water sources for water supply, the water flux should be appropriately reduced to prevent excessive water pressure from damaging the material structure.

[0074] The length of the soft water pipe is within 100 meters and can be selected as needed. One end of the soft water pipe is fixedly connected to the water inlet filter structure. The water inlet filter structure can optionally be equipped with a tubular plastic mesh cover. The plastic mesh cover can filter impurities visible to the naked eye, such as leaves, water plants, red worms, aquatic organisms, etc.

[0075] Furthermore, a water pipe interface 1 is fixedly provided on the housing 200 , the water pipe interface 1 is fixedly connected to the water pump 3 , and one end of the soft water pipe outlet 111 is detachably connected to the water pipe interface 1 .

[0076] Depending on the usage scenario, if the RV is close to the water source, a longer soft water hose can be used to connect to the water source directly; if it is far away from the water source, a bucket is needed to fetch water. At this time, a shorter soft water hose is needed to connect to the water in the bucket. The soft water hose is easy to switch through the quick-connect feature of the water pipe interface 1.

[0077] The above shows and describes the main features, methods of use, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the main features and methods of use of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The fresh water filling device for a motorhome, having a housing, the housing is installed on the motorhome, and is characterized in that: It also includes: An external water source component, a water pump, a coarse filtration component, and a fine filtration component; The external water source component includes a flexible water pipe and a water inlet filtration structure. The water inlet filtration structure is installed at one end of the water inlet of the flexible water pipe, and the water outlet is detachably connected to the water inlet of the water pump; A water pump is arranged inside the machine shell, and the coarse filtration component and the fine filtration component are detachably connected to the outside of the machine shell; The water pump is connected to the coarse filtration component, the coarse filtration component is connected to the fine filtration component, and the fine filtration component is connected to the water outlet pipe; The filtration accuracy of the fine filtration component is higher than that of the coarse filtration component.

2. The clean water filling device for a motor home according to claim 1, wherein: The coarse filtration component includes two groups of filter elements: a coarse pre-filter and a coarse post-filter; The coarse pre-filter is a filter element composed of a hollow filter element rod sintered from ceramic material with a filtration accuracy standard of 10 μm; The coarse post-filter is a filter element composed of a hollow filter element rod sintered from ceramic material with a filtration accuracy standard of 3 μm; The ceramic filter element rod is detachably installed in the filter element, and both ends are blocked. The water to be treated penetrates through the inner wall of the filter element rod from the outer wall of the filter element rod into the internal space to obtain the treated water.

3. The net water filling device for a motorhome according to claim 1, characterized in that: The fine filtration component includes three groups of filter elements: a fine pre-filter, a fine middle filter, and a fine post-filter, all of which are encapsulated in a filter element structure; The fine pre-filter is a filter element composed of a hollow activated carbon rod and a PP cotton wound around the activated carbon rod; The fine middle filter is a filter element composed of cation exchange resin; The fine post-filter is a filter element composed of a hollow activated carbon rod and an electrocrystalline film tube arranged around the activated carbon rod.

4. The fresh water filling device for a motorhome according to claim 3, characterized in that: The filter element structure includes: a filter element tube, a filter element cover, and a filter element housing; The filter element housing is cylindrical, with one side open and the other side closed. There is a convex groove handle on the closed side for easy disassembly and installation of the filter element; The filter element cover has a convex platform formed upward at the center. There is a water outlet pipe hole at the center of the convex platform, and several water inlet holes are opened around the convex platform; The filter element tube is a hollow long tube shape and is arranged between the filter element cover and the filter element housing; near the filter element cover, a pressure plate is provided. The outer diameter of the pressure plate is 0.5 mm - 1 mm smaller than the inner diameter of the filter element housing. Several water passing holes are provided at the edge of the pressure plate; on the side of the pressure plate facing the filter element cover, a support platform is provided on the pipe wall; on the side of the pressure plate facing the filter element housing, it is a water permeable pipe. The bottom of the water permeable pipe is closed by the filter element housing, and several water permeable openings are opened on the pipe wall of the water permeable pipe.

5. The fresh water filling device for a recreational vehicle according to claim 4, characterized in that: The filter element tube is arranged inside the filter element housing, and their central axes coincide; the water outlet pipe hole of the filter element cover passes through the water outlet of the filter element tube and is buckled on the filter element housing. The central axes of the filter element cover and the filter element housing coincide, and the filter element cover and the filter element housing are detachably connected; the filter element cover abuts against the support platform of the filter element tube; The water to be filtered enters from the water inlet holes of the filter element cover, flows along the pressure plate of the filter element tube to the water passing holes provided at the edge of the pressure plate, enters the filtration area of the space of the filter element housing through the water passing holes, and the treated water flows out from the water outlet of the filter element tube through the water permeable openings on the pipe wall of the water permeable pipe.

6. The fresh water filling device for a motor home according to claim 5, characterized in that: The PP cotton in the fine pre-filter uses a specification material with a filtration range of 1 μm, and the activated carbon rod uses a specification material with a mesh number of 100 - 300; One end of the activated carbon rod and the PP cotton is closed by the filter element housing, and the other end is closed by the pressure plate of the filter element tube. The inner diameter of the activated carbon rod is larger than the outer diameter of the water permeable pipe of the filter element tube.

7. The fresh water filling device for a recreational vehicle according to claim 5, characterized in that: The cation exchange resin in the fine filter is in a short fiber structure and is selected as follows: the fineness is 1.2 dtex, the fiber length is 38 mm, the specific surface area of the ion exchange fiber is greater than or equal to 60 m 2 / g, and the specific surface area of the cation exchange fiber is greater than or equal to 63 m 2 / g, and the cation exchange resin of this specification; The cation exchange resin is arranged in a hollow tubular shape, one end is closed by the filter element housing, and the other end is closed by the pressing plate of the filter element tube. The inner diameter of the hollow tubular shape is larger than the outer diameter of the water permeable tube of the filter element tube.

8. The water inlet device for the clean water of the RV according to claim 5, characterized in that: The electrocrystalline membrane tube in the post-precision filter is formed by winding an electrocrystalline membrane into a hollow tubular shape; There is a gap greater than 0.3 mm and less than 1.5 mm between the electrocrystalline membrane tube and the inner wall of the filter element housing; The electrocrystalline membrane uses a material with a filtration accuracy of 2 μm and a retention accuracy of 0.02 μm; The activated carbon rod uses a material with a mesh size of 100 to 300 meshes; One end of the activated carbon rod and the electrocrystalline membrane tube is closed by the filter element housing, and the other end is closed by the pressing plate of the filter element tube. The inner diameter of the activated carbon rod is larger than the outer diameter of the water permeable tube of the filter element tube.

9. The potable water filling device for a recreational vehicle according to claim 1, characterized in that: There is also a clean water tank. The water outlet pipe is fixedly connected to the clean water tank. The clean water tank is provided with an ultraviolet lamp, and the ultraviolet lamp is arranged at the top of the clean water tank; The water pump adopts a water supply pump with a flow rate of 3 m 3 / h to 6.5 m 3 / h and a head greater than 5 m The length of the flexible water pipe ranges from 5 m to 100 m; The inlet filtration structure is a tubular plastic mesh cover.

10. The fresh water filling device for a motorhome according to claim 1, characterized in that: A water pipe interface is fixedly arranged on the machine shell. The water pipe interface is fixedly connected to the water pump, and the water outlet end of the flexible water pipe is detachably connected to the water pipe interface.

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