CN112299587A - Portable reverse osmosis purifier - Google Patents
Portable reverse osmosis purifier Download PDFInfo
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- CN112299587A CN112299587A CN202011319827.0A CN202011319827A CN112299587A CN 112299587 A CN112299587 A CN 112299587A CN 202011319827 A CN202011319827 A CN 202011319827A CN 112299587 A CN112299587 A CN 112299587A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
- C02F1/002—Processes for the treatment of water whereby the filtration technique is of importance using small portable filters for producing potable water, e.g. personal travel or emergency equipment, survival kits, combat gear
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/004—Seals, connections
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/005—Valves
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/06—Pressure conditions
- C02F2301/066—Overpressure, high pressure
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to a portable reverse osmosis water purification device which comprises a device body, wherein the device body comprises a concentrated water cavity, a filtering cavity and a pure water storage cavity, a water filling port is formed in the side wall of the concentrated water cavity, a water outlet is formed in the pure water storage cavity, a manual pressing device is arranged at the upper end of the concentrated water cavity and comprises a sealing piston, a manual pressing handle, a cylindrical shell and a rubber sealing ring, the cylindrical shell and the device body form an integrated structure, the sealing piston is connected with the cylindrical shell, and the manual pressing handle is arranged in the sealing piston. The invention utilizes the reverse osmosis principle, changes the pressure for osmosis generated by electric energy driving into manual pressing type, has small and exquisite structure, novelty, portability and strong processing capability, is suitable for any water source of rivers, lakes and seas in the field, and can produce water reaching the index of direct drinking water.
Description
Technical Field
The invention belongs to the technical field of water filtering devices, and particularly relates to a portable reverse osmosis water purifying device.
Background
When people work in the field or explore the danger, the water in rivers, lakes and seas generally has various problems of pollution, bacteria exceeding the standard, heavy metals exceeding the standard, high salt content and the like, is not suitable for direct drinking, and has serious influence on the health and safety of human bodies. Therefore, the field water is generally drunk after being disinfected by means of boiling the water and putting disinfectant tablets, but the methods can not remove harmful substances such as heavy metals in the water generally, and the defects of the existing reverse osmosis equipment are as follows: 1. large volume and unsuitable for carrying; 2. electrical energy is required to drive the high pressure pump to generate osmotic pressure. The design integrates the advantages of reverse osmosis treated water and the disadvantages of the existing reverse osmosis equipment.
Disclosure of Invention
The invention designs an outdoor portable reverse osmosis water purification device, which is convenient to use, has multiple filtering measures, can remove impurities, rust, colloid, bacteria and viruses by utilizing the reverse osmosis principle, can also remove radioactive particles, organic matters, fluorescent substances, pesticides and heavy metals which are harmful to human bodies, and can directly drink the outlet water, and the specific scheme is as follows: a portable reverse osmosis water purifying device comprises a device body, wherein the device body is of a cylindrical structure, the device body comprises a concentrated water chamber, a filtering chamber and a pure water storage chamber, the concentrated water chamber is arranged at the upper end of the device body, the filtering chamber is connected with the lower end of the concentrated water chamber, the lower end of the filtering chamber is connected with the pure water storage chamber, the side wall of the concentrated water chamber is provided with a water filling port, the pure water storage chamber is provided with a water outlet, wherein, the upper end of the concentrated water chamber is provided with a manual pressing device which comprises a sealing piston, a manual pressing handle, a cylindrical shell and a rubber sealing ring, the cylindrical shell and the device body form an integrated structure, the sealing piston is connected with the cylindrical shell, and the manual pressing handle is arranged in the sealing piston.
Preferably, the concentrated water cavity comprises a concentrated water cavity body, a piston return spring device and a raw water filtering tray, the piston return spring device is arranged in the concentrated water cavity body, the upper end of the piston return spring device is connected with the lower end of the manual pressing device, and the lower end of the piston return spring device is connected with the raw water filtering tray.
In any of the above schemes, preferably, the filtering chamber comprises a quartz sand filtering chamber, a coconut shell activated carbon filtering chamber and a reverse osmosis membrane filtering chamber which are sequentially arranged from top to bottom, and all the chambers are detachably connected.
It is preferred in any one of the above-mentioned schemes, quartz sand filters the chamber and includes quartz sand filter cavity, quartz sand filter layer and quartz sand filter screen, the quartz sand filter layer sets up in the quartz sand filter cavity, the quartz sand filter screen sets up the upper and lower both sides of quartz sand filter cavity.
It is preferred in any one of the above-mentioned schemes that the coconut husk active carbon filters the cavity and includes active carbon filter cavity, active carbon filter layer and active carbon filter screen, the active carbon filter layer sets up in the active carbon filter cavity, the active carbon filter screen sets up the upper and lower both sides of active carbon filter cavity.
Preferably in any one of the above schemes, the reverse osmosis membrane filtration chamber comprises a reverse osmosis membrane filtration cavity, a polypropylene limit filter layer, a support layer and a reverse osmosis membrane filter layer, wherein the upper end and the lower end of the reverse osmosis membrane layer are respectively provided with the support layer, and the upper end of the support layer positioned at the upper end is provided with the polypropylene limit filter layer.
In any one of the above aspects, preferably, a waterproof vent valve is provided in the pure water storage chamber.
The invention utilizes the reverse osmosis principle, changes the pressure for osmosis generated by electric energy driving into manual pressing type, has small and exquisite structure, novelty, portability and strong processing capability, is suitable for any water source of rivers, lakes and seas in the field, and can produce water reaching the index of direct drinking water.
Drawings
Fig. 1 is a schematic view of a preferred embodiment of a portable reverse osmosis water purification unit according to the present invention.
Reference in the drawings 1: a manual pressing device; 1-1: a sealing piston; 1-2: manually pressing the handle; 1-3: a cylindrical housing; 1-4: a rubber seal ring; 2: a concentrate chamber; 2-1: a concentrated water cavity; 2-2: a piston return spring means; 2-3: a raw water filtration tray; 3: a quartz sand filtration chamber; 3-1: a quartz sand filtering cavity; 3-2: a quartz sand filter layer; 3-3: a quartz sand filter screen; 4: a coconut shell activated carbon filtration chamber; 4-1: an active carbon filtering cavity; 4-2: an active carbon filter screen; 4-3: an activated carbon filter layer; 5: a reverse osmosis membrane filtration chamber; 5-1: a reverse osmosis membrane filtration cavity; 5-2: a polypropylene limit filter layer; 5-3: a support layer; 5-4: a reverse osmosis membrane filter layer; 5-5: a waterproof vent valve; 6: a pure water storage chamber; 6-1: a pure water storage cavity.
Detailed Description
In order that the invention may be further understood, the invention will now be described in detail with reference to specific examples.
As shown in figure 1, the invention provides a portable reverse osmosis water purification device, which comprises a device body, wherein the device body is of a cylindrical structure and comprises a concentrated water chamber 2, a filtering chamber and a pure water storage chamber 6, the concentrated water chamber 2 is arranged at the upper end of the device body, the filtering chamber is connected with the lower end of the concentrated water chamber 2, the lower end of the filtering chamber is connected with the pure water storage chamber 6, a water filling port is arranged on the side wall of the concentrated water chamber 2, a water outlet is arranged in the pure water storage chamber 6, wherein a manual pressing device 1 is arranged at the upper end of the concentrated water chamber 2, the manual pressing device 1 comprises a sealing piston 1-1, a manual pressing handle 1-2, a cylindrical shell 1-3 and a rubber sealing ring 1-4, and the cylindrical shell 1-3 and the device body form an integral structure, the sealing piston 1-1 is connected with the cylindrical shell 1-3, the manual pressing handle 1-2 is arranged in the sealing piston 1-1, the lower end of the manual pressing handle 1-2 is provided with a rubber sealing ring 1-4, the concentrated water chamber 2 comprises a concentrated water chamber cavity 2-1, a piston reset spring device 2-2 and a raw water filtering tray 2-3, the piston reset spring device 2-2 is arranged in the concentrated water chamber cavity 2-1, the upper end of the piston reset spring device is connected with the lower end of the manual pressing device 1, the lower end of the piston reset spring device is connected with the raw water filtering tray 2-3, the filtering chamber comprises a quartz sand filtering chamber 3, a coconut shell activated carbon filtering chamber 4 and a reverse osmosis membrane filtering chamber 5 which are sequentially arranged from top to bottom, and all the chambers are detachably connected, the quartz sand filtering chamber 3 comprises a quartz sand filtering cavity 3-1, a quartz sand filtering layer 3-2 and a quartz sand filtering net 3-3, the quartz sand filtering layer 3-2 is arranged in the quartz sand filtering cavity 3-1, the quartz sand filtering net 3-3 is arranged at the upper side and the lower side of the quartz sand filtering cavity 3-1, the coconut shell active carbon filtering chamber 4 comprises an active carbon filtering cavity 4-1, an active carbon filtering layer 4-3 and an active carbon filtering net 4-2, the active carbon filtering layer 4-3 is arranged in the active carbon filtering cavity 4-1, the active carbon filtering net 4-2 is arranged at the upper side and the lower side of the active carbon filtering cavity 4-1, the reverse osmosis membrane filtering chamber 5 comprises a reverse osmosis membrane filtering cavity 5-1, a quartz sand filtering net 3-3, and a reverse osmosis membrane filtering net 5, The device comprises a polypropylene limiting filter layer 5-2, a supporting layer 5-3 and a reverse osmosis membrane filter layer 5-4, wherein the upper end and the lower end of the reverse osmosis membrane layer 5-4 are respectively provided with the supporting layer 5-3, the upper end of the supporting layer 5-3 positioned at the upper end is provided with the polypropylene limiting filter layer 5-2, a pure water storage cavity 6-1 is arranged in the pure water storage cavity 6, and the side wall of the pure water storage cavity 6-1 is provided with a waterproof vent valve 5-5.
The reverse osmosis principle adopted by the invention is as follows: a reverse osmosis membrane is one of semipermeable membranes, and a membrane having selectivity for a substance to be permeated is called a semipermeable membrane, and a membrane which is permeable only to a solvent but not to a solute is generally called an ideal semipermeable membrane. When the same volume of dilute solution (e.g., fresh water) and concentrated solution (e.g., saline) is placed on each side of the semi-permeable membrane, the solvent in the dilute solution will naturally flow through the semi-permeable membrane spontaneously to the concentrated solution side, a phenomenon known as osmosis. When the osmosis reaches the equilibrium, the liquid level of the concentrated solution side is higher than the liquid level of the dilute solution by a certain height, namely, a pressure difference is formed, and the pressure difference is the osmotic pressure. The magnitude of the osmotic pressure depends on the inherent properties of the solution, i.e. on the type, concentration and temperature of the concentrated solution and not on the properties of the semipermeable membrane. If a pressure greater than the osmotic pressure is applied to the concentrated solution side, the solvent will flow in the opposite direction to the original direction of osmosis, and will start to flow from the concentrated solution to the dilute solution side, a process known as reverse osmosis. Reverse osmosis, which is a reverse migration motion of osmosis, is a separation method of separating solute from solvent in solution by selective interception of semipermeable membrane under pressure driving, and is widely used for purification and concentration of various liquids, wherein the most common application example is in water treatment process, impurities such as inorganic ions, bacteria, viruses, organic matters and colloids in raw water are removed by reverse osmosis technology to obtain high-quality purified water.
Manual press device 1, when the applied pressure is greater than the osmotic pressure of liquid, the hydrone in raw water (the water of outdoor rivers lake sea) just can see through reverse osmosis membrane, forms straight drinking water, and manual press device is by: the handle 1-2 is pressed manually, and the scale mark is provided with a pressing mark; a sealing piston 1-1 with an I-shaped section; 1-4 parts of a rubber sealing ring; the cylindrical shell 1-3 with the internal threads is a cylindrical cavity and is made of 316L stainless steel.
The main function of the concentrate chamber 2 is to hold water from an outdoor source (i.e., raw water) and the concentrate remaining after filtration, and the concentrate chamber is formed by: the concentrated water cavity 2-1 is a cylindrical cavity and is made of 316L stainless steel, the upper part of the concentrated water cavity is provided with external threads, and the lower part of the concentrated water cavity is provided with internal threads; a piston return spring means 2-2; 2-3 parts of a raw water filtering tray.
The fine quartz sand with the size of 0.5mm-1mm is arranged in the quartz sand filtering chamber 3, the quartz sand can effectively remove particle impurities, suspended matters, colloid and the like in water, the turbidity of raw water can be effectively reduced, water becomes clearer, and the quartz sand filtering chamber consists of: the quartz sand filtering cavity 3-1 is a cylindrical cavity and is made of 316L stainless steel, the upper part of the quartz sand filtering cavity is provided with an external thread, and the lower part of the quartz sand filtering cavity is provided with an internal thread; 3-2 parts of a quartz sand filter layer; and the quartz sand filter screen 3-3 is composed of a stainless steel mesh with the aperture of 0.3mm x 0.3 mm.
The active carbon in the coconut shell active carbon filtering chamber 4 has strong adsorption effect, forms a large number of micro-pores with various shapes in the activation process, can remove residual chlorine, free objects, microorganisms, bacteria, viruses, organic matters, radioactive substances of heavy metals (mercury, silver, cadmium, chromium, lead, nickel and the like) in water, and can effectively reduce the chroma of water and peculiar smell in water. The coconut shell activated carbon filtering chamber consists of: the active carbon filtering cavity 4-1 is a cylindrical cavity made of 316L stainless steel, the upper part of the active carbon filtering cavity is provided with an external thread, and the lower part of the active carbon filtering cavity is provided with an internal thread; 4-3 parts of an active carbon filter layer; and the activated carbon filter screen 4-2 is composed of a stainless steel mesh with the aperture of 0.3mm x 0.3 mm.
The reverse osmosis membrane filtering cavity 5 is a cylindrical cavity 5-1, the upper part of the cavity is provided with an external thread, and the lower part of the cavity is provided with an internal thread; 5-2 parts of a polypropylene fiber filter layer, wherein the filtering precision is 5 um; 5-4 of a reverse osmosis membrane filter layer, which is made of the following materials: the filtering precision of the cellulose acetate is between 0.1nm and 0.7nm, so that harmful substances such as bacteria, viruses, microorganisms, salts, colloids and the like in water can be effectively removed; the support layer 5-3 is made of 316L stainless steel with water permeable holes; and the waterproof vent valve 5-5 can realize a device which is air-permeable but watertight, and is arranged to exhaust air in the pure water storage chamber when manual pressure is applied so as not to suppress pressure.
Pure water storage chamber 6: the device is mainly used for storing filtered and purified direct drinking water. The water storage cavity is made of 316L stainless steel, wherein the pure water storage cavity is 6-1 and is a cylindrical cavity, and the upper part of the pure water storage cavity is provided with external threads.
The integral structure of the invention consists of the six parts, the six parts can be freely disassembled, and the quartz sand filter layer, the active carbon filter layer and the reverse osmosis membrane filter layer can be disassembled, cleaned and replaced at any time, thus being convenient to use.
The using method and the steps are as follows:
install each structure in proper order, the mounting means is the thread connection, with the leading-in dense water cavity 2 of dense water, once pours into the volume and is: 500mL, installing the manual pressing device 1 on the concentrated water chamber 2 in a threaded buckle connection mode, and manually and slowly pressing the manual pressing device 1 until the pressing mark scale line is flush with the top surface of the cylindrical shell 1-3; after the concentrated water passes through the quartz sand, the activated carbon and the polypropylene fiber filter layer, under the action of pressing, when the pressing pressure is greater than the osmotic pressure of the reverse osmosis membrane, water molecules penetrate through the reverse osmosis membrane and flow into the purified water storage chamber, according to different water sources, the recovery rate of the purified water is about 50%, about 250mL of the purified water can be obtained, the manual pressing device 1 is loosened, the purified water storage chamber is automatically restored to the original position under the action of the piston return spring device 2-2, the purified water storage chamber is taken down, and the purified water in the purified water storage chamber can be directly drunk.
It will be understood by those skilled in the art that a portable reverse osmosis water purification device of the present invention includes any combination of the summary and the detailed description of the invention described above and shown in the drawings, which is not intended to be limited to space and not to describe each embodiment of the combination for the sake of brevity. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A portable reverse osmosis water purifying device comprises a device body, wherein the device body is of a cylindrical structure, the device body comprises a concentrated water chamber, a filtering chamber and a pure water storage chamber, the concentrated water chamber is arranged at the upper end of the device body, the filtering chamber is connected with the lower end of the concentrated water chamber, the lower end of the filtering chamber is connected with the pure water storage chamber, the side wall of the concentrated water chamber is provided with a water filling port, the pure water storage chamber is provided with a water outlet, it is characterized in that the upper end of the concentrated water chamber is provided with a manual pressing device, the manual pressing device comprises a sealing piston, a manual pressing handle, a cylindrical shell and a rubber sealing ring, the cylindrical shell and the device body form an integrated structure, the sealing piston is connected with the cylindrical shell, and the manual pressing handle is arranged in the sealing piston.
2. The portable reverse osmosis water purification device of claim 1, wherein the concentrate chamber comprises a concentrate chamber cavity, a piston return spring device and a raw water filter tray, the piston return spring device is arranged in the concentrate chamber cavity, the upper end of the piston return spring device is connected with the lower end of the manual pressing device, and the lower end of the piston return spring device is connected with the raw water filter tray.
3. The portable reverse osmosis water purification device of claim 1, wherein the filtration chamber comprises a quartz sand filtration chamber, a coconut shell activated carbon filtration chamber and a reverse osmosis membrane filtration chamber which are arranged from top to bottom in sequence.
4. The portable reverse osmosis water purification device of claim 3, wherein the quartz sand filtering chamber comprises a quartz sand filtering cavity, a quartz sand filtering layer and quartz sand filtering nets, the quartz sand filtering layer is arranged in the quartz sand filtering cavity, and the quartz sand filtering nets are arranged at the upper and lower sides of the quartz sand filtering cavity.
5. The portable reverse osmosis water purification device of claim 3, wherein the coconut shell activated carbon filtering chamber comprises an activated carbon filtering cavity, an activated carbon filtering layer and activated carbon filtering nets, the activated carbon filtering layer is arranged in the activated carbon filtering cavity, and the activated carbon filtering nets are arranged at the upper side and the lower side of the activated carbon filtering cavity.
6. The portable reverse osmosis water purification device of claim 3, wherein the reverse osmosis membrane filtration chamber comprises a reverse osmosis membrane filtration cavity, a polypropylene limiting and filtering layer, a supporting layer and a reverse osmosis membrane filtering layer, the upper end and the lower end of the reverse osmosis membrane layer are respectively provided with the supporting layer, and the upper end of the supporting layer at the upper end is provided with the polypropylene limiting and filtering layer.
7. A portable reverse osmosis water purification device according to claim 1, wherein a waterproof vent valve is provided in the pure water storage chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011319827.0A CN112299587A (en) | 2020-11-23 | 2020-11-23 | Portable reverse osmosis purifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011319827.0A CN112299587A (en) | 2020-11-23 | 2020-11-23 | Portable reverse osmosis purifier |
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| Publication Number | Publication Date |
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| CN112299587A true CN112299587A (en) | 2021-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011319827.0A Pending CN112299587A (en) | 2020-11-23 | 2020-11-23 | Portable reverse osmosis purifier |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113008656A (en) * | 2021-03-23 | 2021-06-22 | 国家***北海环境监测中心 | Phytoplankton sample in-situ concentration device and method |
| CN115340202A (en) * | 2021-05-14 | 2022-11-15 | 贵州清之源环保工程有限公司 | Novel unpowered integrated water purification equipment |
-
2020
- 2020-11-23 CN CN202011319827.0A patent/CN112299587A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113008656A (en) * | 2021-03-23 | 2021-06-22 | 国家***北海环境监测中心 | Phytoplankton sample in-situ concentration device and method |
| CN113008656B (en) * | 2021-03-23 | 2022-08-19 | 国家***北海环境监测中心 | Phytoplankton sample in-situ concentration device and method |
| CN115340202A (en) * | 2021-05-14 | 2022-11-15 | 贵州清之源环保工程有限公司 | Novel unpowered integrated water purification equipment |
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