Portable multipurpose water purifying device

Abstract

The invention provides a portable multipurpose water purifying device. The portable multipurpose water purifying device comprises a pipeline system, a filtering module, a water drawing pump, a reversing valve and a stop valve, the pipeline system is connected with the water drawing pump, the reversing valve, the stop valve and the filtering module to form an ultrafiltration water production waterway, a forward washing waterway and a back washing waterway which are mutually switched; the filtering module comprises an ultrafiltration assembly and is used for filtering raw water; the ultrafiltration assembly comprises a water inlet side, a water producing side and a concentrated water side; the water drawing pump is arranged at the water inlet end of the pipeline system; the water outlet end of the water drawing pump is communicated with the water inlet side of the ultrafiltration assembly; the reversing valve is arranged on a pipeline between the water drawing pump and the filtering module and is provided with a water production station and a backwashing station, and at the water production station, water output by the water drawing pump flows in from the water inlet side of the ultrafiltration assembly and flows out from the water production side and the concentrated water side; at the backwashing station, water output by the water drawing pump flows in along the water producing side of the ultrafiltration assembly and flows out along the concentrated water side. The ultrafiltration and reverse osmosis filter technologies are combined, two water production modes are supported, flexible switching can be achieved according to different water sources, and the application range is wide.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of field water purification devices, in particular to a portable multipurpose water purification device. Especially, a portable multipurpose water purification device used in low temperature environment. BACKGROUND

[0002] People working in the field for a long time need to drink water on the spot, but the water source in the field often contains pathogenic microorganisms or exceeds the standard of heavy metals, which cannot be directly drunk. At present, portable water purifiers are often used to treat environmental water to achieve purification. The core principle of the existing portable water purification device is adsorption and filtration, and the filter material used mainly includes granular activated carbon, activated carbon fiber, ion exchange resin, PP cotton melt-blown filter core, ceramic membrane, ultrafiltration membrane, etc.

[0003] The above filter materials have problems such as easy clogging, difficult regeneration and cleaning, and short service life. From the removal effect, except that ceramic membranes and ultrafiltration membranes can ensure the removal of turbidity and bacteria in water, other filter materials cannot ensure the reliability of the water quality; and ceramic membranes or ultrafiltration membranes cannot filter small and medium molecular organic matter and inorganic salts, so they cannot be used for purification of seawater or brackish water.

[0004] In view of the above problems, Chinese patent No. CN205241423U discloses a field portable water purification device, which includes a water treatment unit, a storage battery, a solar collector, etc. It adopts a multi-channel filtration structure (including a filter cotton system and a reverse osmosis membrane system), and provides power for the reverse osmosis membrane system through a high-pressure plunger pump. However, the device does not have an independent water inlet pump, and the self-suction capacity of the ordinary high-pressure plunger pump is limited, which will affect the water production; at the same time, in order to meet the high-power electricity demand of the high-pressure plunger pump, a storage battery with large output power needs to be equipped, which increases the volume and weight of the storage battery, and the volume of the matching solar collector also increases, which actually cannot reflect the advantage of "portable".

[0005] When the environmental temperature is lower than zero, the pump assembly and pipeline system in the water purification device may freeze, causing the device to not work normally; and for organic filter membranes, the water production often decreases with the decrease of the water inlet temperature. At present, there are few portable water purification devices with heating function.

[0006] Chinese patent No. CN215924427U discloses a portable water purifier with heating function, which solves the problem of freezing of the filter core during use, but the electric heating plate heating adopted in this scheme is contact conduction heating, which is only effective for heating the filter core box, and the heating and thawing efficiency of other components such as the water inlet pump in the box is poor, and the type of filter core is not specified, which cannot explain its filtering capacity and filtering object.

[0007] Chinese patent number CN205974135U proposes a multifunctional portable field water purification device, including a shell, a multi-layer filter layer, a water storage cavity, a heating device, a backup water reservoir, etc. The filter layer of this scheme uses activated carbon and other filter materials to filter and fiber filter layer, which can remove impurities, macromolecular organic matter, bacteria and part of heavy metal ions in water. However, this device is difficult to remove small and medium molecular organic matter and inorganic salt, and the filter layer is easy to be contaminated and needs to be frequently replaced and maintained; at the same time, its heating device is mainly used for heating drinking water, rather than heating and thawing the internal components of the device, and cannot be applied to high-cold areas.

[0008] Chinese patent number CN206680295U proposes a field water purification device, which is composed of a water pump, a raw water tank, a heating type heat exchanger, a U-shaped pipe filter device, a hot water tank, a cooling type heat exchanger and a cold water tank connected in sequence through water pipes. The U-shaped pipe filter device of this scheme includes two pre-filter pipes, two hard water softening pipes and two precision filter pipes, wherein the precision filter pipe is provided with a multi-layer folded filter layer structure and a reverse osmosis membrane structure; from the structure composition, there is no booster pump to provide osmotic pressure in front of the reverse osmosis membrane, resulting in low water production and poor filtering effect on salt. In addition, the heating function of this scheme is only for drinking water, rather than heating and thawing the internal components, and also cannot be applied to high-cold areas.

[0009] The existing patent document with publication number CN208791317U discloses a fluid filter device and a water purifier comprising the same. The fluid filter device comprises a TDS filter device, a purified water supply pipeline and a pipeline switching device. The inflow ports of the TDS filter device and the purified water supply pipeline are connected in parallel and then connected to the fluid inlet of the fluid filter device through the pipeline switching device. The outflow ports of the TDS filter device and the purified water supply pipeline are connected in parallel and then connected to the fluid outlet of the fluid filter device. The pipeline switching device can select the inflow port of one of the TDS filter device and the purified water supply pipeline to be in communication with the fluid inlet of the fluid filter device. The utility model effectively prolongs the service life of the resin filter element while reducing the TDS of the first few cups of water taken after the water purifier is shut down.

[0010] However, the patent document CN208791317U does not use ultrafiltration and reverse osmosis components in combination, thereby having two water production modes, lower flexibility in use, and not having filter membrane forward and reverse flushing process, shorter service life of filter membrane. SUMMARY

[0011] In view of the defects in the prior art, the purpose of the present application is to provide a portable multipurpose water purification device.

[0012] According to the portable multipurpose water purification device provided by the present application, the portable multipurpose water purification device comprises a filter module, a water pump, a reversing valve, a first stop valve, a second stop valve and a concentrated water pressure regulating valve. The portable multipurpose water purifying device comprises a super filtration water production water path, a forward flushing water path and a reverse flushing water path which can be switched with each other; The filtration module comprises a super filtration assembly, and a water production side of the super filtration assembly is connected to the first stop valve and the second stop valve through different pipelines respectively, and a concentrated water side of the super filtration assembly is connected to a concentrated water pressure regulating valve; The reversing valve is connected between the water pump and the water inlet side and the water production side of the super filtration assembly; When the super filtration water production water path is switched, the reversing valve is controlled to be connected between the water pump and the water inlet side of the super filtration assembly, the first stop valve is opened, and the second stop valve is closed, so that the water production side of the super filtration assembly produces super filtration water which is discharged through the first stop valve, and the concentrated water side of the super filtration assembly produces concentrated water which is discharged through the concentrated water pressure regulating valve; When the forward flushing water path is switched, the reversing valve is connected between the water pump and the water inlet side of the super filtration assembly, and the first stop valve and the second stop valve are closed, so that the flushing water flows into the water inlet side and is discharged from the concentrated water side of the super filtration assembly; When the reverse flushing water path is switched, the reversing valve is connected between the water pump and the water production side of the super filtration assembly, and the first stop valve and the second stop valve are closed, so that the flushing water flows into the water production side and is discharged from the concentrated water side of the super filtration assembly.

[0013] Preferably, the portable multipurpose water purifying device can also be switched to a reverse osmosis water production water path; The filtration module further comprises a reverse osmosis assembly and a high-pressure pump, and the high-pressure pump is connected between the second stop valve and the reverse osmosis assembly; When the reverse osmosis water production water path is switched, the reversing valve is controlled to be connected between the water pump and the water inlet side of the super filtration assembly, the first stop valve is closed, and the second stop valve is opened, so that the super filtration water produced by the water production side of the super filtration assembly enters the high-pressure pump for pressure boosting through the second stop valve, and then flows into the reverse osmosis assembly for filtration.

[0014] Preferably, when the super filtration water production water path is formed, the concentrated water pressure regulating valve is adjusted to have a pressure greater than zero; When the forward flushing water path or the reverse flushing water path is formed, the concentrated water pressure regulating valve is adjusted to have a pressure equal to zero.

[0015] Preferably, the portable multipurpose water purifying device further comprises a heating and heat preservation assembly; The heating and heat preservation assembly comprises a heating cloth and a heat preservation cover; The portable multipurpose water purifying device is provided with a box body on the outside, the heating cloth is attached to the inner wall of the box body, and is used for heating and thawing the pipelines, the water pump and the filtration module; The heat preservation cover is sleeved on the outside of the box body, and is used for reducing heat loss in the heating process; The heating cloth can stop heating when the temperature exceeds a set value, and can start heating when the temperature is lower than the set value.

[0016] Preferably, the filter module comprises at least two ultrafiltration assemblies connected in parallel, and the water inlet side, the concentrated water side and the water production side of the ultrafiltration assemblies are communicated with each other respectively. Each ultrafiltration assembly comprises an ultrafiltration membrane, which is a polyvinylidene fluoride hollow fiber membrane with a filtration accuracy of 3-100 nm.

[0017] Preferably, the filter module comprises at least two reverse osmosis assemblies connected in series, and the series connection mode is that the waste water side of the upstream reverse osmosis assembly is communicated with the water inlet side of the downstream adjacent reverse osmosis assembly, and the water production sides of the reverse osmosis assemblies are communicated with each other to jointly produce reverse osmosis water. Each reverse osmosis assembly comprises a reverse osmosis membrane, which is a spiral structure aromatic polyamide composite membrane with a filtration accuracy of 0.3-1.2 nm.

[0018] Preferably, the portable multipurpose water purifier further comprises an internal pipeline. The internal pipeline is made of 2205 duplex stainless steel and is used for connecting the water suction pump, the high-pressure pump and the filter module, and is suitable for seawater use environment.

[0019] Preferably, the portable multipurpose water purifier further comprises an operation and control panel. The operation and control panel is arranged above the box body and comprises a power socket, a pressure gauge salinometer, an ultrafiltration starting switch, a reverse osmosis starting switch and a heating switch. The ultrafiltration starting switch is used for controlling the start and stop of the water suction pump, the reverse osmosis starting switch is used for controlling the start and stop of the high-pressure pump, and the heating switch is used for controlling the start and stop of the heating cloth. The detection end of the pressure gauge is arranged at the concentrated water side of the ultrafiltration assembly and the waste water side of the reverse osmosis assembly, and is used for monitoring the membrane pressure change of the ultrafiltration assembly and the reverse osmosis assembly. The detection end of the salinometer is arranged at the water production side of the reverse osmosis assembly and is used for real-time detection of the water quality of the produced water. The operation and control panel is made of carbon fiber material.

[0020] Preferably, when the portable multipurpose water purifier performs ultrafiltration water production, reverse osmosis water production, forward flushing or back flushing, the opening degree of the concentrated water pressure regulating valve is adjusted to control the pressure in the ultrafiltration assembly to be stable in a set range.

[0021] Preferably, the portable multipurpose water purifier further comprises a coarse filter. The coarse filter is arranged at the water inlet side of the water suction pump and is used for pre-filtering raw water to remove impurity particles with a preset diameter in the raw water, so as to avoid the impurity particles from entering the water suction pump or the ultrafiltration assembly to cause blockage.

[0022] Compared with the prior art, the portable multipurpose water purifier has the following beneficial effects: 1、The present application adopts the combination filtering technology of "ultrafiltration assembly + reverse osmosis assembly" and supports two water making modes, can be switched flexibly according to different water sources, and can meet the drinking demand by using single ultrafiltration for surface water, and can realize desalination by using ultrafiltration + reverse osmosis for seawater / brackish water, thereby expanding the application scenarios of the device and making the device more widely used. 2、The present application adopts the large-flux membrane assembly, sets the double-branch parallel connection of the ultrafiltration assembly and the double-branch series connection of the reverse osmosis assembly, and is matched with the combination of "water pumping pump + plunger type high-pressure pump", uses the water pumping pump to solve the problem of insufficient self-suction capacity of the high-pressure pump, and the double-pump combination provides sufficient water inlet pressure and water supply for the reverse osmosis membrane, and the parallel / series connection design of the double-branch membrane further ensures the water production in low-temperature environment, and avoids the insufficient water production in low-temperature environment. 3、The present application sets the heating and heat preservation assembly, and selects the extremely low temperature resistant silica gel pipe as the external pipeline, in the low-temperature environment, the heating cloth heats and thaws the main parts such as the pump and the membrane assembly in the box through infrared radiation, the heat preservation cover reduces heat loss, and the low-temperature resistant pipeline is matched, so that the device can not freeze and normally operate in the high-cold area below zero degrees. 4、The present application sets the reversing valve at the water inlet end of the ultrafiltration assembly, sets the stop valve at the water outlet end and designs the forward flushing and backwashing process, can realize the forward flushing and backwashing of the ultrafiltration membrane through the switching valve, effectively eliminates the membrane pollution, greatly improves the anti-pollution ability of the device, prolongs the service life of the membrane, and ensures the reliability of long-time operation of the device. BRIEF DESCRIPTION OF DRAWINGS

[0023] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments with reference to the following drawings: Figure 1 It is a portable multipurpose water purification device appearance diagram in the embodiment of the present application; Figure 2 It is a portable multipurpose water purification device internal structure diagram in the embodiment of the present application.

[0024] In the drawings: DETAILED DESCRIPTION

[0025] The present application will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art to further understand the present application, but do not limit the present application in any form. It should be pointed out that those skilled in the art can make several changes and improvements without departing from the concept of the present application. These all belong to the protection scope of the present application.

[0026] The application provides a portable multipurpose water purifying device which can be used in low temperature environment, the device contains ultrafiltration assembly and reverse osmosis assembly, adopts integrated design of box and instrument, and is convenient to carry and use. In view of the problems of easy icing and low water production of the water purifying device in low temperature, the device can start heating function under low temperature condition to ensure stable operation; meanwhile, ultrafiltration or reverse osmosis purification function can be selected according to raw water quality, the filtering precision is high, and the device is suitable for field workers to use local water in alpine regions. The ultrafiltration assembly is used for purification treatment of surface water, and can also be used for pretreatment of seawater or brackish water desalination, and the reverse osmosis assembly adopts reverse osmosis filtration technology and is used for desalination treatment of seawater or brackish water.

[0027] As shown in Figure 1 and Figure 2 , the device mainly comprises a box body 1, a water pumping pump 2, a high-pressure pump 3, an ultrafiltration assembly 4, a reverse osmosis assembly 5, a pipeline system 6, a heating and heat preservation assembly and an operation and control panel 8.

[0028] The box body 1 is used as a supporting platform of various assemblies in the device and is composed of an upper cover, a box body, buckles, hinges, sealing strips and the like, and is convenient to open; the box body is made of lightweight high-strength carbon fiber composite material, has long service life, excellent corrosion resistance and anti-creeper performance, and can ensure good performance of the box body in rainstorm, sunshine, high and low temperature, salt fog and other harsh outdoor environments; high-elasticity buffer materials are arranged in the box body to protect the internal assemblies and prevent the device from being damaged due to falling during transportation or use in the field; handles are arranged on both sides of the box body, and a carrying strap is arranged at the bottom, so that the device can be carried by one person or two people.

[0029] The water pumping pump 2 is installed in the box body 1 and is a miniature diaphragm pump with self-priming function, one end of which is connected with a water inlet interface 85, and the other end is connected with the ultrafiltration assembly 4 through a three-way joint. The water pumping pump 2 adopts a brushless motor and a water cooling structure to improve the heat dissipation performance of the motor and avoid failure of the motor due to overheating during long-time work in a small space.

[0030] The water inlet end of the pipeline system 6 is also provided with a coarse filter 9, which is arranged on the water inlet side of the water pumping pump 2 and is used for pre-filtering raw water. After pre-filtering by the coarse filter 9, the raw water enters the water pumping pump 2 and is delivered to the ultrafiltration assembly 4 for filtration after being pressurized by the water pumping pump 2. The coarse filter 9 is used for removing impurity particles with a preset diameter from the raw water to avoid blockage of the water pumping pump 2 or the ultrafiltration assembly 4 by the impurity particles, and the preset diameter can be set according to actual requirements.

[0031] The ultrafiltration assembly 4 has a water inlet side, a water outlet side and a concentrated water side, wherein the water inlet side is used for inputting raw water pressurized by the water pumping pump 2, the water outlet side is used for outputting filtered ultrafiltration water, and the concentrated water side is used for discharging concentrated water containing filtered waste.

[0032] The filtering module can include two or more parallel ultrafiltration assemblies 4, the water inlet sides of each ultrafiltration assembly 4 being connected to each other through pipelines, the concentrated water sides being connected to each other through pipelines, and the water outlet sides also being connected to each other through pipelines, so as to improve the overall filtering flux.

[0033] Each ultrafiltration assembly 4 can include an ultrafiltration membrane, a membrane shell assembly, and a sealing member, for removing impurities such as fine particles, microorganisms (bacteria, viruses, etc.), colloids, and macromolecular organic matters in water, and for ensuring water production at low temperatures.

[0034] The ultrafiltration membrane can be a polyvinylidene fluoride (PVDF) hollow fiber membrane, which has high aging resistance, radiation resistance, and corrosion resistance to acids, alkalis, and strong oxidants at room temperature. The membrane can be chemically cleaned to restore the membrane flux after fouling, so as to achieve the purpose of repeated use. The membrane shell assembly can be made of carbon fiber composite material.

[0035] The filtering precision of the ultrafiltration membrane can be 3-100 nm. For surface water purification, the water produced after being filtered by the ultrafiltration membrane can meet the drinking water hygiene standards. For seawater or brackish water desalination, the ultrafiltration water can be used as the water inlet of the reverse osmosis membrane, so as to improve the service life of the reverse osmosis membrane.

[0036] A reversing valve 61 is installed at the water inlet end of the ultrafiltration assembly 4, for switching between water production and backwashing. The reversing valve includes a water production position and a backwashing position. When in the water production position, the reversing valve 61 connects the water inlet interface 85 and the water inlet end pipeline of the ultrafiltration assembly 4, so that the water output by the water pump 2 flows into the water inlet side of the ultrafiltration assembly 4, and flows out from the water outlet side and the concentrated water side of the ultrafiltration assembly 4, respectively. The water outlet side outputs the ultrafiltration water, and the concentrated water side discharges the concentrated water containing impurities. When in the backwashing position, the reversing valve 61 connects the water inlet interface 85 and the water outlet end pipeline of the ultrafiltration assembly 4, so that the water output by the water pump 2 flows into the water outlet side of the ultrafiltration assembly 4 and flows out from the concentrated water side, to realize backwashing. The raw water passes through the reversing valve 61 after passing through the water inlet interface 85, and then enters the ultrafiltration assembly 4 through the three-way joint.

[0037] A concentrated water pressure regulating valve 62 and a pressure gauge 810 are installed at the concentrated water end of the ultrafiltration assembly 4. The concentrated water interface 87 is connected to the output end of the concentrated water pressure regulating valve 62. The concentrated water pressure regulating valve 62 is used to regulate the discharge amount of the concentrated water of the ultrafiltration assembly 4. When the device is used for ultrafiltration water production and reverse osmosis water production, the pressure in the ultrafiltration assembly 4 can be stably controlled within a set range by adjusting the opening degree of the concentrated water pressure regulating valve 62.

[0038] The water outlet end of the ultrafiltration assembly 4 is connected to a first stop valve 63 and a second stop valve 64, respectively. The first stop valve 63 is connected to the ultrafiltration water outlet interface 88, and is used to close the ultrafiltration water outlet channel when the reverse osmosis water is produced. The second stop valve 64 is connected to the water inlet end of the high-pressure pump 3, and is used to close the water inlet channel of the high-pressure pump 3 when the ultrafiltration assembly is washed.

[0039] The high-pressure pump 3 adopts a plunger type high-pressure pump, is equipped with a brushless motor and a water cooling structure, has the advantages of low noise and good heat dissipation performance, the water outlet end is connected with the reverse osmosis assembly 5, and the ultrafiltration product water is pressurized and then delivered to the reverse osmosis assembly 5, so as to provide sufficient working pressure and water supply for the reverse osmosis membrane. The working pressure makes the liquid in the pipe reach the osmotic pressure required by reverse osmosis filtration, meets the requirement of the portable multipurpose water purifying device of the application for large water yield at low temperature, and ensures that the reverse osmosis membrane has sufficient water inlet pressure.

[0040] The filtration module can include two or more reverse osmosis assemblies 5 connected in series with each other, and the series connection mode is that the waste water side of the reverse osmosis assembly 5 located upstream is connected with the water inlet side of the adjacent reverse osmosis assembly 5 located downstream through a pipeline, and the product water sides of the reverse osmosis assemblies 5 are directly connected through a pipeline system 6 to the reverse osmosis product water interface 89, so as to improve the membrane system recovery rate, waste water utilization rate and overall desalination rate.

[0041] Each reverse osmosis assembly 5 can be composed of a reverse osmosis membrane, a membrane shell assembly and a sealing element, and is used for removing small molecular organic matter, inorganic salt and other components in water.

[0042] The reverse osmosis membrane can be a spiral structure aromatic polyamide composite membrane, which is convenient to replace and clean, has good chemical stability, high desalination rate, is not eroded by microorganisms, does not hydrolyze for a long time, has a maximum allowable temperature of 45℃, and is suitable for field operation environment; the reverse osmosis membrane has a filtration precision of 0.3-1.2nm; and the membrane shell can be made of carbon fiber composite material to ensure the water yield requirement at low temperature.

[0043] The waste water end of the reverse osmosis assembly 5 can be provided with a waste water pressure regulating valve 65 and a pressure gauge 810, which are used for adjusting the waste water amount and the reverse osmosis water inlet pressure, and the water inlet pressure can be adjusted according to the total dissolved substance (TDS) value in the raw water, so as to ensure normal operation of the device.

[0044] The pipeline system 6 can include internal pipelines, external pipelines and various valve elements, and is used for connecting the water inlet and outlet interfaces, pump assemblies, membrane assemblies and valves. The valve elements can include a concentrated water pressure regulating valve 62, a reversing valve 61, a first stop valve 63 and a second stop valve 64; and the internal pipelines can be made of 2205 duplex stainless steel. The corrosion resistance of the 2205 duplex stainless steel is better than that of 316L stainless steel, is suitable for a seawater use environment, and is suitable for connecting the pump assemblies, the membrane assemblies and the valves.

[0045] The external pipeline 6 can be selected from silica gel hoses with a temperature resistance lower than a preset temperature, including a water inlet pipe, a concentrated water pipe, a waste water pipe and a water production pipe. The water inlet pipe is used for raw water pumping, the concentrated water pipe is used for conveying concentrated water discharged by the ultrafiltration assembly 4, the waste water pipe is used for conveying waste water discharged by the reverse osmosis assembly 5, and the water production pipe is used for conveying ultrafiltration water or reverse osmosis water to a water storage container, so as to realize raw water pumping, concentrated water and waste water discharge and water production recovery. The above-mentioned preset temperature is lower than zero degrees, and is specifically set according to the minimum temperature in a cold region.

[0046] The pump assembly includes the water pumping pump 2 and the high-pressure pump 3, the membrane assembly includes the ultrafiltration assembly 4 and the reverse osmosis assembly 5, and the water inlet and outlet interface includes the water inlet interface 85, the waste water interface 86, the concentrated water interface 87, the ultrafiltration water production interface 88 and the reverse osmosis water production interface 89.

[0047] The heating and heat preservation assembly includes the heating cloth 71 and the heat preservation cover 72. The heating cloth 71 can be selected from graphene electric heating cloth, which is light and thin and has good insulation, waterproof and flame retardant properties, and can automatically limit temperature. Four heating cloths 71 of different sizes can be directly bonded to the inner walls of four sides of the box body, and can heat the inside of the box body through infrared radiation after being electrified, so as to thaw the internal components.

[0048] The heating cloth 71 can have a self-temperature control function, which automatically stops heating when the temperature in the box 1 exceeds the set value, and restarts when the temperature is lower than the set value, so as to avoid damage to the internal components caused by excessive temperature. When the environment is harsh (such as low temperature and rain and wind), the heat preservation cover 72 can be sleeved outside the device. The cover is made of waterproof Oxford cloth, which can play a certain heat preservation role in low temperature working, reduce heat exchange with the external environment when the device is heated, reduce heat loss, have the functions of rain and wind resistance, and reduce heat loss when the device is heated, thereby improving heating efficiency. The heating cloth 71 can be customized according to the size of the device, and its opening and closing are controlled by the heating switch 84.

[0049] The operation and control panel 8 is installed above the box body 1, and is used for monitoring the running state of the water purification device and performing various operation controls, including the power socket 81, the ultrafiltration water production switch 82, the reverse osmosis water production switch 83, the pressure gauge 810, the salinity meter 811, the water inlet interface 85, the ultrafiltration water production interface 88, the reverse osmosis water production interface 89, the waste water interface 86, the concentrated water interface 87 and various valve operation handles. The operation and control panel 8 is made of carbon fiber material, so as to achieve the effects of shock resistance and anti-collision.

[0050] The detecting end of the pressure gauge 810 is arranged in the concentrated water side pipeline of the ultrafiltration assembly 4 and the waste water side pipeline of the reverse osmosis assembly 5 respectively, for accurately monitoring the membrane pressure change of the ultrafiltration assembly 4 and the reverse osmosis assembly 5, judging the operation condition and the membrane performance of the device; the detecting end of the salinity meter 811 is arranged in the water production side pipeline of the reverse osmosis assembly 5, for real-timely detecting the salinity of the reverse osmosis water production, and ensuring that the water quality of the water production meets the standard; the power socket 81 is used for external power input; the ultrafiltration water production switch 82, the reverse osmosis water production switch 83 and the heating switch 84 are used for starting / closing the pump assembly and the heating and heat preservation assembly.

[0051] Specifically, the ultrafiltration water production switch 82 is used for controlling the start and stop of the water pumping pump 2, and the reverse osmosis water production switch 83 is used for controlling the start and stop of the high-pressure pump 3.

[0052] The working process of the portable multipurpose water purifying device is as follows: When used in a low-temperature environment (below zero Celsius), first, connect the external pipelines with the device, including connecting the water inlet pipe with raw water, the concentrated water pipe with a concentrated water collecting container, the waste water pipe with a waste water discharge end, and the water production pipe with a water storage container, and connect the power adapter to the power socket 81; after the connection is completed, put on the heat preservation cover 72 on the box body 1 and tighten it, and lead out the water pipes and the cable through the outlets on the two sides of the heat preservation cover 72, start the heating switch 84 to thaw the internal components of the device, and the heating time is determined according to the environmental temperature and the icing condition; after thawing, start the device to produce water.

[0053] Ultrafiltration water production: an ultrafiltration water production water path needs to be formed, at this time, the reversing valve 61 is placed in the water production position, the first stop valve 63 is opened, the second stop valve 64 is closed, and the concentrated water pressure regulating valve 62 is adjusted to have a pressure greater than zero; open the ultrafiltration water production switch 82, the raw water is pre-filtered by the coarse filter 9, pressurized by the water pumping pump 2, and then enters the water inlet side of the ultrafiltration assembly 4 through the reversing valve 61, after being filtered by the ultrafiltration membrane, the ultrafiltration water flows to the ultrafiltration water production interface 88 through the first stop valve 63 from the water production side, and is discharged into the water storage container; the concentrated water containing impurities flows to the concentrated water interface 87 from the concentrated water side through the concentrated water pressure regulating valve 62, and the ultrafiltration water production is completed.

[0054] Reverse osmosis water production: a reverse osmosis water production water path needs to be formed, at this time, the reversing valve 61 is placed in the water production position, the first stop valve 63 is closed, and the second stop valve 64 is opened; open the ultrafiltration water production switch 82, the raw water enters the ultrafiltration assembly 4 for pretreatment through the coarse filter 9, the water pumping pump 2 and the reversing valve 61, and after the ultrafiltration runs stably, open the reverse osmosis water production switch 83; adjust the opening degree of the concentrated water pressure regulating valve 62 to control the pressure in the ultrafiltration assembly 4 to be stable in the set range; the high-pressure pump 3 pressurizes the ultrafiltration water production and sends it into the water inlet side of the reverse osmosis assembly 5, after being deeply filtered by the reverse osmosis membrane, the fresh water flows to the reverse osmosis water production interface 89 from the water production side, and is discharged into the water storage container; the reverse osmosis waste water flows to the waste water interface 86 from the waste water side through the waste water pressure regulating valve 65, and the reverse osmosis water production is completed.

[0055] Positive flushing: the positive flushing water path needs to be formed, at this time the reversing valve 61 is placed in the water making position, the first stop valve 63 and the second stop valve 64 are both closed, and the concentrated water pressure regulating valve 62 is adjusted to have a pressure equal to zero; clean water (such as purified ultrafiltration water) is used as flushing water, the ultrafiltration water making switch 82 is started, the clean water is pressurized by the water pumping pump 2 and then enters the water inlet side of the ultrafiltration assembly 4 through the reversing valve 61 to positively flush the ultrafiltration membrane, the flushing waste water is discharged from the concentrated water side through the concentrated water pressure regulating valve 62, and the positive flushing can be completed after stable operation for several minutes to eliminate the pollution on the surface of the ultrafiltration membrane.

[0056] Backwashing: the backwashing water path needs to be formed, at this time the reversing valve 61 is placed in the backwashing position, the first stop valve 63 and the second stop valve 64 are both closed, and the concentrated water pressure regulating valve 62 is adjusted to have a pressure equal to zero; clean water is used as water inlet, the ultrafiltration water making switch 82 is started, the clean water is pressurized by the water pumping pump 2 and then enters the water production side of the ultrafiltration assembly 4 through the reversing valve 61 to flush the ultrafiltration membrane in the opposite direction of water making, the flushing waste water is discharged from the concentrated water side through the concentrated water pressure regulating valve 62, and the backwashing can be completed after stable operation for several minutes to eliminate the internal pollution of the ultrafiltration membrane.

[0057] If only type I-III surface water is treated, the reverse osmosis water making does not need to be started, only the ultrafiltration water making can meet the drinking water hygiene requirements, and the water production is larger; if seawater or brackish water is treated, the reverse osmosis water making needs to be started to ensure that the water production removes small and medium-sized organic matter and inorganic salt to reach the drinking standard.

[0058] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0059] The specific embodiments of the present application are described above. It should be understood that the present application is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essential content of the present application. The embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other without conflict.

Claims

1. A portable multi-purpose water purification device, characterized by, The portable multipurpose water purifier comprises a filter module, a water suction pump (2), a reversing valve (61), a first stop valve (63), a second stop valve (64) and a concentrated water pressure regulating valve (62). The portable multipurpose water purifier comprises a filter module, a water suction pump (2), a reversing valve (61), a first stop valve (63), a second stop valve (64) and a concentrated water pressure regulating valve (62). The filter module comprises an ultrafiltration assembly (4), and the water production side of the ultrafiltration assembly (4) is connected to the first stop valve (63) and the second stop valve (64) through different pipelines respectively, and the concentrated water side of the ultrafiltration assembly (4) is connected to the concentrated water pressure regulating valve (62). The reversing valve (61) is connected between the water suction pump (2) and the water inlet side and the water production side of the ultrafiltration assembly (4). When the ultrafiltration water production pipeline is switched, the reversing valve (61) is controlled to connect the water suction pump (2) and the water inlet side of the ultrafiltration assembly (4), the first stop valve (63) is opened, the second stop valve (64) is closed, the water production side of the ultrafiltration assembly (4) produces ultrafiltration water, the ultrafiltration water is discharged through the first stop valve (63), and the concentrated water side of the ultrafiltration assembly (4) produces concentrated water, and the concentrated water is discharged through the concentrated water pressure regulating valve (62). When the forward flushing water pipeline is switched, the reversing valve (61) is controlled to connect the water suction pump (2) and the water inlet side of the ultrafiltration assembly (4), the first stop valve (63) and the second stop valve (64) are closed, and the flushing water flows into the water inlet side of the ultrafiltration assembly (4) and is discharged from the concentrated water side. When the reverse flushing water pipeline is switched, the reversing valve (61) is controlled to connect the water suction pump (2) and the water production side of the ultrafiltration assembly (4), the first stop valve (63) and the second stop valve (64) are closed, and the flushing water flows into the water production side of the ultrafiltration assembly (4) and is discharged from the concentrated water side. The portable multipurpose water purifier can also be switched to a reverse osmosis water production pipeline.

2. The portable, multi-use water purification device of claim 1, wherein, The filter module further comprises a reverse osmosis assembly (5) and a high-pressure pump (3), and the high-pressure pump (3) is connected between the second stop valve (64) and the reverse osmosis assembly (5). When the reverse osmosis water production pipeline is switched, the reversing valve (61) is controlled to connect the water suction pump (2) and the water inlet side of the ultrafiltration assembly (4), the first stop valve (63) is closed, the second stop valve (64) is opened, the ultrafiltration water produced by the water production side of the ultrafiltration assembly (4) enters the high-pressure pump (3) for pressure boosting and then flows into the reverse osmosis assembly (5) for filtration. When the ultrafiltration water production pipeline is formed, the concentrated water pressure regulating valve (62) is adjusted to have a pressure greater than zero.

3. The portable, multi-use water purification device of claim 1, wherein, When the forward flushing water pipeline or the reverse flushing water pipeline is formed, the concentrated water pressure regulating valve (62) is adjusted to have a pressure equal to zero. The portable multipurpose water purifier further comprises a heating and heat preservation assembly.

4. The portable, multi-use water purification device of claim 1, wherein, The heating and heat preservation assembly comprises a heating cloth (71) and a heat preservation cover (72). The portable multipurpose water purifier is provided with a box body (1), the heating cloth (71) is attached to the inner wall of the box body (1), and the pipeline, the water suction pump (2) and the filter module are heated and thawed. The heat preservation cover (72) is arranged outside the box body (1) to reduce heat loss during the heating process. The heating cloth (71) can stop heating when the temperature exceeds a set value and start heating when the temperature is below the set value. The filter module comprises at least two parallel ultrafiltration assemblies (4), and the water inlet side, the concentrated water side and the water production side of the ultrafiltration assembly (4) are connected to each other. ​ 5. The portable, multi-use water purification device of claim 1, wherein, ​ Each ultrafiltration assembly (4) comprises an ultrafiltration membrane, which is a polyvinylidene fluoride hollow fiber membrane with a filtration accuracy of 3-100 nm.

6. The portable, multi-use water purification device of claim 2, wherein, The filtration module comprises at least two reverse osmosis assemblies (5) connected in series, wherein the wastewater side of the upstream reverse osmosis assembly (5) is communicated with the water inlet side of the downstream adjacent reverse osmosis assembly (5), and the water outlet sides of the reverse osmosis assemblies (5) are communicated with each other to jointly produce reverse osmosis water. Each reverse osmosis assembly (5) comprises a reverse osmosis membrane, which is a spiral structure aromatic polyamide composite membrane with a filtration accuracy of 0.3-1.2 nm.

7. The portable, multi-use water purification device of claim 2, wherein, Further comprising: internal pipeline; The internal pipeline is made of 2205 duplex stainless steel and is used to connect the water suction pump (2), the high-pressure pump (3) and the filtration module, and is suitable for seawater use environment.

8. The portable, multi-use water purification device of claim 4, wherein, Further comprising: operation and control panel (8); The operation and control panel (8) is arranged above the box (1) and comprises a power socket (81), a pressure gauge (810), a salinity meter (811), an ultrafiltration start switch (82), a reverse osmosis start switch (83) and a heating switch (84). The ultrafiltration start switch (82) is used to control the start and stop of the water suction pump (2), the reverse osmosis start switch (83) is used to control the start and stop of the high-pressure pump (3), and the heating switch (84) is used to control the start and stop of the heating cloth (71). The detection end of the pressure gauge (810) is arranged at the concentrated water side of the ultrafiltration assembly (4) and the wastewater side of the reverse osmosis assembly (5) to monitor the membrane pressure changes of the ultrafiltration assembly (4) and the reverse osmosis assembly (5). The detection end of the salinity meter (811) is arranged at the water outlet side of the reverse osmosis assembly (5) to detect the water quality in real time. The operation and control panel (8) is made of carbon fiber material.

9. The portable, multi-use water purification device of claim 2, wherein, When the portable multipurpose water purifier performs ultrafiltration, reverse osmosis, forward flushing or back flushing, the opening degree of the concentrated water pressure regulating valve (62) is adjusted to control the pressure in the ultrafiltration assembly (4) to be stable within a set range.

10. The portable, multi-use water purification device of claim 1, wherein, Further comprising: coarse filter (9); The coarse filter (9) is arranged at the water inlet side of the water suction pump (2) to pre-filter the raw water and remove impurity particles larger than a preset diameter in the raw water, so as to avoid the impurity particles from entering the water suction pump (2) or the ultrafiltration assembly (4) to cause blockage.

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