Portable direct drinking water preparation device

Abstract

The utility model discloses a portable direct drinking water preparation device which comprises a primary filter, a pressurization energy storage device and a final-stage filter, and a primary filtered water outlet of the primary filter is communicated with a water inlet area of the final-stage filter through the pressurization energy storage device. The pressurizing energy storage device comprises a pressurizing cavity, an elastic air bag arranged in the pressurizing cavity and a pump body used for pumping primarily filtered water into the pressurizing cavity, a primarily filtered water inlet and a pressurizing water outlet are formed in the pressurizing cavity, and the primarily filtered water inlet is communicated with the pressurizing cavity through the pump body; an inlet of the water inlet area is communicated with a pressurized water outlet of the pressurized energy accumulator, an outlet of the water inlet area is communicated with an inlet of the concentrated water diversion layer, a purified water port and a concentrated water port are formed in the final-stage filter cartridge, the purified water port is communicated with the purified water area, and the concentrated water port is communicated with the concentrated water diversion layer. And an outlet of the concentrated water area is communicated with the concentrated water port through a concentrated water discharge valve and a concentrated water auxiliary discharge valve which are connected in parallel. The device is convenient to carry and operate, stable in performance and large in water yield.

Description

TECHNICAL FIELD

[0001] The utility model relates to water purification device, concretely relates to a portable direct drinking water preparation device. BACKGROUND

[0002] In people's life and work often encounter some sudden situation, such as the army in the sea execution task, field survival water shortage;Ship at sea breaks down and cannot provide drinking water;Because of natural disasters, war and other extreme conditions, power failure, water cut-off, etc., can only obtain drinking water from the surrounding environment, but the water source of the surrounding environment, especially seawater, usually cannot reach the drinking water standard, and needs to be purified and treated as drinking water.

[0003] The existing portable water purification device is mainly divided into fresh water purification device and seawater desalination device. Most of the fresh water purification device adopts multi-stage filtration, which can only remove most of the solid particles and a small part of bacteria, and cannot reach the direct drinking water standard, and further treatment is required for direct drinking. Portable seawater desalination device because the osmotic pressure of seawater is as high as 2.4-5Mpa, reverse osmosis membrane filtration must be taken, and the working pressure of the membrane is 3-7Mpa, which has great difficulty in manufacturing and operation.

[0004] At present, the water purification device using reverse osmosis (RO) membrane generally has problems of low water production, laborious operation and short service life of reverse osmosis (RO) membrane, the main reasons are: the water flow in the reverse osmosis membrane is not smooth, and the salt and solid particles are easy to accumulate and block the filter hole of the membrane; the pressure is unstable during manual operation, so that the pressure difference inside and outside the reverse osmosis (RO) membrane is alternately changed between 0 and several megapascals, which is easy to damage the membrane of the reverse osmosis (RO) membrane (because the reverse osmosis membrane needs to be slowly pressurized, and the most taboo is instantaneous pressure, pressure loss);Some products are designed to reserve a certain cavity, and the air in the cavity is used as pressure buffer, but the air in the high pressure environment contacts with water, and the solubility of some gases in the air increases sharply, because the pressure difference inside and outside the RO membrane is as high as 7Mpa, when the gas dissolved in water passes through the filter hole of the RO membrane, the gas bubble is instantaneously precipitated and rapidly bursts, which damages the RO membrane, and also accelerates the damage of the membrane, affecting the service life of the reverse osmosis (RO) membrane. UTILITY MODEL CONTENTS

[0005] The technical problem to be solved by the utility model is that the reverse osmosis (RO) membrane in the existing water purification device is easy to be damaged under the action of the pressure difference inside and outside the membrane, and the utility model provides a portable direct drinking water preparation device which can relieve the pressure difference inside and outside the reverse osmosis (RO) membrane and protect the reverse osmosis (RO) membrane.

[0006] To solve the above technical problems, the utility model adopts the following technical scheme:

[0007] The utility model provides a portable direct drinking water preparation device, including primary filter and last filter, the primary filter is equipped with raw water inlet and primary filter water outlet, the last filter includes last filter cartridge and installs last filter core in last filter cartridge, the last filter core is sealed with last filter cartridge between the water inlet area and the thick water area of area and area, installs reverse osmosis membrane in last filter core, forms the clean water area in the reverse osmosis membrane inside, and the thick water guide layer is installed to the outside, the outlet of thick water guide layer with the thick water area intercommunication, its structural characteristics are:

[0008] The primary filter water outlet is communicated with the water inlet area of the last filter through the pressurized accumulator;

[0009] The pressurized accumulator includes pressurized cavity, the elastic air bag of being placed in pressurized cavity, the pump body for pumping primary filter water into the pressurized cavity, the pressurized cavity is provided with primary filter water inlet and pressurized water outlet, and the primary filter water inlet is communicated with the pressurized cavity through the pump body;

[0010] The inlet of the water inlet area is communicated with the pressurized water outlet of the pressurized accumulator, the outlet of the water inlet area is communicated with the inlet of the thick water guide layer, the last filter cartridge is provided with clean water port and thick water port, the clean water port is communicated with the clean water area, and the outlet of the thick water area is communicated with the thick water port through the parallel thick water discharge valve and thick water auxiliary discharge valve.

[0011] Preferably, the pump body is a plunger pump, the sealed working chamber of the plunger pump is communicated with the primary filter water inlet through the inlet one-way valve, and the sealed working chamber of the plunger pump is communicated with the pressurized cavity through the outlet one-way valve, the piston rod of the plunger pump is connected with a handle, and the plunger pump is driven to work by pulling up or pressing down the handle.

[0012] Preferably, the raw water inlet of the primary filter is provided with a pre-filter.

[0013] Preferably, the inlet of the water inlet area is provided with an overpressure safety valve.

[0014] Preferably, the elastic air bag is a rubber air bag.

[0015] Preferably, the rubber air bag is made of butyl rubber.

[0016] Compared with the prior art, the utility model has the beneficial effects that:

[0017] The utility model protects the reverse osmosis (RO) membrane in all directions by reasonable layout and material selection, greatly prolongs the service life of the reverse osmosis (RO) membrane, improves reliability and practicability, and reduces use and maintenance costs. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0019] Figure 1 It is a structure schematic diagram of the utility model.

[0020] Figure 2 It is a structure schematic diagram when the handle of the pressurized energy accumulator plunger pump is pressed down.

[0021] Figure 3 It is a structure schematic diagram when the handle of the pressurized energy accumulator plunger pump is lifted up.

[0022] Figure 4 It is a structure schematic diagram of the pressurized energy accumulator.

[0023] Figure 5 It is a structure schematic diagram of the final stage filter.

[0024] In the drawings:

[0025] 1 - pre-filter;

[0026] 2 - primary filter, 21 - raw water inlet, 22 - primary filtered water outlet, 23 - primary filter cartridge, 24 - primary filter element, 25 - primary filter cartridge end cover, 26 - raw water area, 27 - primary filtered water area;

[0027] 3 - pressurized energy accumulator, 31 - pressurizing cavity, 32 - elastic air bag, 33 - plunger pump, 34 - primary filtered water inlet, 35 - pressurized water outlet, 36 - inlet one-way valve, 37 - outlet one-way valve, 311 - pressurized energy accumulator cylinder, 312 - fixed screw rod, 313 - pressurized energy accumulator cylinder end cover, 321 - inflation port, 331 - sealed working chamber, 332 - handle;

[0028] 4 - final stage filter, 41 - final stage filter element, 42 - clean water outlet, 43 - concentrated water outlet, 44 - concentrated water drain valve, 45 - concentrated water auxiliary drain valve, 46 - final stage filter cartridge, 47 - final stage filter cartridge end cover, 48 - sealing ring, 49 - overpressure safety valve, 411 - clean water collection flow guide layer, 412 - clean water collection water production pipe, 413 - reverse osmosis membrane, 414 - clean water area, 415 - concentrated water flow guide layer, 416 - final stage filter element shell, 461 - water inlet area, 462 - concentrated water area;

[0029] 5 - high-pressure metal pipe. DETAILED DESCRIPTION

[0030] The utility model is further described below in combination with specific preferred embodiments, but the protection scope of the utility model is not limited by this.

[0031] In the description of the utility model, it needs to be explained that the orientation or position relation indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. The terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection; it can be directly connected, or indirectly connected through intermediate medium; it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0033] Please refer to Figure 1 - Figure 5 The embodiment of the utility model portable direct drinking water preparation device includes prefilter 1, primary filter 2, pressurized energy accumulator 3 and final filter 4 connected in turn.

[0034] Prefilter 1 is connected with raw water inlet 21 of primary filter 2 through PE pipe, and is used for filtering out silt and impurities in water.

[0035] Primary filter 2 includes primary filter cartridge 23 and primary filter element 24. The top of primary filter cartridge 23 is connected by screw thread, and primary filter cartridge end cover 25 is provided with raw water inlet 21 and primary filtered water outlet 22. The primary filter element 24 is sealingly installed in the primary filter cartridge 23, and the primary filter element 24 divides the inner cavity of the primary filter cartridge 23 into raw water area 26 and primary filtered water area 27, the primary filtered water area 27 is arranged in the primary filter element 24, the raw water inlet 21 is communicated with the raw water area 26, and the primary filtered water area 27 is communicated with the primary filtered water outlet 22. The primary filter cartridge 23 is preferably made of transparent PET material, so that the primary filter element 24 can be observed; the primary filter element 24 adopts hollow fiber ultrafiltration membrane wire, and the average pore size is 0.01 microns, which can effectively block most impurities, microorganisms and the like, and can be cleaned and reused, avoiding frequent replacement.

[0036] The pressurized energy storage device 3 comprises a pressurized cavity 31, an elastic air bag 32 placed in the pressurized cavity 31, and a plunger pump 33 communicating with the pressurized cavity 31.

[0037] The pressurized cavity 31 is a sealed cavity formed by a pressurized energy storage cylinder 311 connected with a pressurized energy storage cylinder end cover 313 through a fixing screw 312. The plunger pump 33, an inlet one-way valve 36, and an outlet one-way valve 37 are installed on the pressurized energy storage cylinder end cover 313. An initial filtration water inlet 34 and a pressurized water outlet 35 are arranged on the pressurized energy storage cylinder end cover 313. The initial filtration water inlet 34 is connected with the initial filtration water outlet 22 of the primary filter 2 through a PE pipe.

[0038] The elastic air bag 32 is provided with an air inlet 321. The elastic air bag 32 is filled with air through the air inlet 321 and then fills the pressurized cavity 31. The elastic air bag 32 is preferably made of butyl rubber, which has very low air permeability, good high and low temperature performance, and is environmentally friendly and non-polluting. The inside and outside of the elastic air bag 32 are completely isolated, so that the air in the elastic air bag 32 does not contact the initial filtration water in the pressurized cavity 31, thereby avoiding damage to the reverse osmosis (RO) membrane in the subsequent final filter 4.

[0039] The plunger pump 33 is of a conventional structure. The sealed working chamber 331 of the plunger pump 33 communicates with the initial filtration water inlet 34 through the inlet one-way valve 36 and communicates with the pressurized cavity 31 through the outlet one-way valve 37. The piston rod of the plunger pump 33 is connected with a handle 332. By pulling up or pressing down the handle 332, the piston of the plunger pump 33 can be driven to move up and down. In combination with the actions of the inlet one-way valve 36 and the outlet one-way valve 37, the initial filtration water can be introduced into the pressurized cavity 31 through the initial filtration water inlet 34. The inlet one-way valve 36 is used to input the initial filtration water from the initial filtration water inlet 34 into the sealed working chamber 331 of the plunger pump 33. The outlet one-way valve 37 is used to input the pressurized water in the sealed working chamber 331 of the plunger pump 33 into the pressurized cavity 31.

[0040] The end-stage filter 4 comprises an end-stage filter cartridge 46, an end-stage filter core 41 and an end-stage filter cartridge end cover 47, the end-stage filter core 41 is arranged in the end-stage filter cartridge 46, and the end-stage filter cartridge 46 and the end-stage filter cartridge end cover 47 are sealingly connected. A sealing ring 48 is arranged between the end-stage filter core 41 and the end-stage filter cartridge 46, the sealing ring 48 divides the inner cavity of the end-stage filter cartridge 46 into a water inlet area 461 and a concentrated water area 462, a reverse osmosis membrane 413 is arranged in the end-stage filter core 41, a concentrated water flow guide layer 415 is arranged on the outer periphery of the reverse osmosis membrane 413, a purified water area 414 is formed on the inner side of the reverse osmosis membrane 413, and the concentrated water area 462 is communicated with the outlet of the concentrated water flow guide layer 415. The inlet of the water inlet area 461 is communicated with the pressurized water outlet 35 of the pressurized energy storage device 3 through the high-pressure metal pipe 5, and the outlet of the water inlet area 461 is communicated with the inlet of the concentrated water flow guide layer 415. The purified water outlet 42 and the concentrated water outlet 43 are arranged on the end-stage filter cartridge end cover 47, the purified water outlet 42 is communicated with the purified water area 414, and the outlet of the concentrated water area 462 is communicated with the concentrated water outlet 43 through the concentrated water discharge valve 44 and the concentrated water auxiliary discharge valve 45 in parallel. The inlet of the water inlet area 461 is provided with an overpressure safety valve 49, so that the reverse osmosis membrane 413 is prevented from being damaged due to excessively high water inlet pressure.

[0041] The high-pressure metal pipe 5, the pressurized energy storage cartridge 311, the end-stage filter cartridge 46 and the end-stage filter cartridge end cover 47 are all made of 316 stainless steel, and have the advantages of high strength, good pressure resistance, corrosion resistance, no secondary pollution and stable and reliable performance. The end-stage filter core 41 adopts a seawater desalination RO membrane with a pressure resistance of 800-1000 psi (5.5-6.9 Mpa), an average pore size of 0.0001 microns, high desalination rate, high pressure resistance, long service life, modular design, simple structure, convenient operation and high practicability.

[0042] It should be noted that the primary filter core 24 and the end-stage filter core 41 are both of the existing structure.

[0043] In use, the elastic air bag 32 is first filled with gas and expanded to fill the pressurized cavity 31 of the pressurized energy storage device 3. Then, the concentrated water auxiliary discharge valve 45 is kept at a certain opening degree during the whole use process, so that the concentrated water in the concentrated water flow guide layer 415 on the outer periphery of the reverse osmosis membrane 413 continuously flows, and the probability of clogging of the filter holes of the reverse osmosis membrane 413 is greatly reduced.

[0044] The pre-filter 1 is placed under the surface of raw water (sea water, fresh water) for pre-filtering, and the concentrated water discharge valve 44 is opened, and the plunger pump 33 is operated: when the handle 332 of the plunger pump 33 is lifted, a low pressure (vacuum) is formed in the sealed working chamber 331 of the plunger pump 33, at this time, the outlet one-way valve 37 is closed, and the inlet one-way valve 36 is opened, so that the sealed working chamber 331 of the plunger pump 33 sucks in air or primary filtered water, then, the handle 332 of the plunger pump 33 is pressed down, a high pressure is formed in the sealed working chamber 313 of the plunger pump 33, the inlet one-way valve 36 is closed, and the outlet one-way valve 37 is opened, so that the air or primary filtered water is pumped out to the pressurizing chamber 31 (such as Figure 2 、 Figure 3 ). The operation is repeated until the primary filtered water completely discharges the air in the concentrated water area 462 of the final filter 4, and fills the concentrated water area 462 of the final filter 4 and flows out from the concentrated water outlet 43, at this time, the concentrated water discharge valve 44 is closed, and the plunger pump 33 is continuously operated to pump in the primary filtered water, so that the gas in the elastic air bag 32 in the pressurizing chamber 31 is continuously compressed to store energy (such as Figure 2 ), at the same time, the primary filtered water is continuously pumped into the water inlet area 461, the concentrated water guide layer 415 and the concentrated water area 462 of the final filter 4 through the high-pressure metal pipe 5, and the pressure in the concentrated water guide layer 415 gradually increases, so that the direct impact of the plunger pump 33 on the membrane of the reverse osmosis membrane 413 when pumping in the high-pressure primary filtered water is eliminated, and the requirement of slowly pressurizing the reverse osmosis membrane 413 is met. At this time, because the concentrated water auxiliary discharge valve 45 keeps a certain opening, when the pressure in the concentrated water guide layer 415 of the final filter 4 increases, the primary filtered water in the concentrated water guide layer 415 flows out through the concentrated water auxiliary discharge valve 45 under the action of the pressure difference, so that the flowability is maintained and the membrane of the reverse osmosis membrane 413 is washed. On the other hand, according to the setting, the amount of the primary filtered water pumped in by the plunger pump 33 is greater than the amount of the concentrated water discharged by the concentrated water auxiliary discharge valve 45, so the pressure in the concentrated water guide layer 415 of the final filter 4 will become higher and higher, when the pressure exceeds the minimum working pressure of the reverse osmosis membrane 413, the water molecules pass through the reverse osmosis membrane 413 and the pure water collection guide layer 411 to enter the pure water area 414 under the high pressure difference, and are led out through the pure water outlet 42 to generate drinkable fresh water.

[0045] When the pressure in the water inlet area 461 of the final filter 4 exceeds the set pressure, the overpressure safety valve 49 automatically opens to release pressure to a safe pressure, so as to ensure the safety of the reverse osmosis membrane 413.

[0046] In this way, as long as sufficient primary filtered water is pumped in to maintain the pressure in the concentrated water guide layer 415 of the final filter 4 within the working pressure range of the reverse osmosis membrane 413, drinkable pure water can be continuously produced.

[0047] The special structure of the plunger pump 33 has the advantage of pumping high-pressure medium, but also has the defect of not being able to continuously pump high-pressure medium. The introduction of the elastic air bag 32 successfully overcomes this defect. When the handle 332 of the plunger pump 33 is pressed down, the plunger pump 33 pumps the primary filtered water into the pressurized cavity 31 through the outlet check valve 37. Part of the pumped primary filtered water enters the final filter 4 to participate in water production, and the other part enters the pressurized cavity 31 of the pressurized energy storage device 3 to compress the gas in the elastic air bag 32 to achieve energy storage (as shown in Figure 2 ). When the handle 332 of the plunger pump 33 is lifted, the outlet check valve 37 is closed, and the water production is still continuing in this process. The pressure in the concentrated water flow guide layer 415 of the final filter 4 will decrease, and the gas in the elastic air bag 32 will expand and press the peripheral primary filtered water through the elastic air bag wall under the action of the pressure difference, and the peripheral primary filtered water will be pressed into the final filter 4 to continue to participate in water production (as shown in Figure 3 ). This cycle is repeated to achieve continuous water production. Due to the presence of the elastic air bag 32, only a small part of the pressure generated by pressing down the handle 332 of the plunger pump 33 acts on the reverse osmosis membrane 413 in the final filter 4, and most of the pressure is absorbed by the gas in the elastic air bag 32. Therefore, the handle 332 of the plunger pump 33 is smooth and labor-saving to operate, greatly reducing the labor intensity and enhancing the practicality of the product. In this way, through the introduction of the pressurized energy storage device 3, the reverse osmosis membrane 413 is protected in all directions, greatly prolonging the service life of the reverse osmosis membrane 413.

[0048] When the handle 332 of the plunger pump 33 is pressed down, the inlet check valve 36 is closed, the outlet check valve 37 is opened, and the pressurized primary filtered water in the sealed working chamber 331 of the plunger pump 33 is pumped into the pressurized cavity 31. The pressure is transmitted to the reverse osmosis membrane 413 in the final filter 4 through the primary filtered water in the pressurized cavity 31, and is also transmitted to the wall of the elastic air bag 32, so that the gas in the elastic air bag 32 is compressed, the capsule body of the elastic air bag 32 is contracted, and the functions of absorbing pressure impact and storing energy are achieved (as shown in Figure 2 ). When the handle 332 of the plunger pump 33 is lifted, the inlet check valve 36 is opened, the outlet check valve 37 is closed, and the sealed working chamber 331 sucks in the primary filtered water. The final filter 4 continuously consumes the primary filtered water in the water inlet area 461 in the working state, and the internal pressure gradually decreases to form a pressure difference with the pressure in the pressurized energy storage cylinder 311. The gas in the elastic air bag 32 expands under the action of the pressure difference, presses the peripheral primary filtered water through the wall of the elastic air bag 32, and supplements part of the primary filtered water in the pressurized cavity 31 to the water inlet area 461 of the final filter 4 through the high-pressure metal pipe 5 to maintain a certain pressure and transmit it to the reverse osmosis (RO) membrane in the final filter 4 (as shown in Figure 3 ). This not only realizes the continuity of water production, but also reduces the range of pressure fluctuations in the final filter 4 caused by manual operation, protects the reverse osmosis (RO) membrane, and also reduces the labor intensity of manual operation.

[0049] The utility model discloses a simple structure, stable performance, convenient operation, low cost of use and maintenance, and stronger practicality.

[0050] The above is only the specific implementation scheme of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can utilize the disclosed technical content to make many possible changes and modifications to the utility model technical scheme or modify as equivalent examples of equivalent changes without departing from the scope of the utility model technical scheme. Therefore, any simple modification, equivalent change and modification of the above examples according to the technical essence of the utility model should fall within the protection scope of the utility model technical scheme.

Claims

1. A portable direct drinking water preparation device, comprising a primary filter and a final filter, the primary filter being provided with a raw water inlet and a primary filtered water outlet, the final filter comprising a final filter cartridge and a final filter element installed in the final filter cartridge, the final filter element and the final filter cartridge being separated into a water inlet area and a concentrated water area, a reverse osmosis membrane being installed in the final filter element, a purified water area being formed inside the reverse osmosis membrane, and a concentrated water guide layer being installed outside the reverse osmosis membrane, an outlet of the concentrated water guide layer being in communication with the concentrated water area, characterized in that: the primary filtered water outlet of the primary filter is in communication with the water inlet area of the final filter through a pressurized energy accumulator; the pressurized energy accumulator comprises a pressurized cavity, an elastic air bag installed in the pressurized cavity, and a pump body for pumping the primary filtered water into the pressurized cavity, a primary filtered water inlet and a pressurized water outlet being provided on the pressurized cavity, the primary filtered water inlet being in communication with the pressurized cavity through the pump body; an inlet of the water inlet area is in communication with the pressurized water outlet of the pressurized energy accumulator, an outlet of the water inlet area is in communication with an inlet of the concentrated water guide layer, a purified water outlet and a concentrated water outlet are provided on the final filter cartridge, the purified water outlet is in communication with the purified water area, and an outlet of the concentrated water area is in communication with the concentrated water outlet through a concentrated water discharge valve and a concentrated water auxiliary discharge valve in parallel. the pump body is a plunger pump, a sealed working chamber of the plunger pump is in communication with the primary filtered water inlet through an inlet one-way valve, and the sealed working chamber of the plunger pump is in communication with the pressurized cavity through an outlet one-way valve, a piston rod of the plunger pump is connected with a handle, and the plunger pump is driven to work by pulling up or pressing down the handle. the raw water inlet of the primary filter is installed with a pre-filter. the inlet of the water inlet area is installed with an overpressure safety valve.

2. The portable still water preparation apparatus according to claim 1, wherein, the elastic air bag is a rubber air bag.

3. The portable direct drinking water preparation device of claim 1, wherein, the rubber air bag is made of butyl rubber.

4. The portable direct drinking water preparation device of claim 1, wherein, ​ 5. The portable direct drinking water preparation device of claim 1, wherein, ​ 6. The portable still of claim 5, wherein, ​

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