CN201404769Y - Portable membrane filtering device - Google Patents
Portable membrane filtering device Download PDFInfo
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- CN201404769Y CN201404769Y CN2009201029336U CN200920102933U CN201404769Y CN 201404769 Y CN201404769 Y CN 201404769Y CN 2009201029336 U CN2009201029336 U CN 2009201029336U CN 200920102933 U CN200920102933 U CN 200920102933U CN 201404769 Y CN201404769 Y CN 201404769Y
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Abstract
The utility model discloses a portable membrane filtering device, consisting of a preset membrane filter, a refined membrane filter, a throttling coupler and a pressure regulator which are assembled into one body, wherein water is pumped by negative pressure of the pressure regulator for pre-filtration, treated with refined filtering by pressurizing of the pressure regulator, and subjected to layer-by-layer filtration by multi-layer membranes and filtering materials to realize the purpose of purifying water. The device can be used for any places with water at any time and any place, effectively filter harmful substances in the water, and discharge water conforming to the national sanitation standard of drinking water, thus providing safe and sanitary domestic water. The device has the characteristics of simple structure, low cost, small volume and light weight, has convenient carry, use, installation, disassembling and exchange and is used for filtering water in any place with water.
Description
Technical field
The utility model relates to a kind of filter, and especially a kind of portable film filtering apparatus is used for the various water occasions that have, water filtered, purifies, to provide the self-control water purification that meets national hygiene standard for drinking water whenever and wherever possible.
Background technology
The continuous deterioration of the water quality that is caused along with the expansion day by day of day being becoming tight of water globe resource, pollution of waterhead degree and scope, using water wisely, safe water have been the common recognition of various countries.The straight drinking water of China resident mainly contains plain boiled water, machine filter running water, filter back fill water, water purifier or pure water mechanism water etc. at present, and some can not effectively remove harmful substance in the water these water sources, and some price is higher relatively; And resident kitchen guarding's water mainly is running water, water tower water-feeding, well water, cellar water etc., all exists in various degree to pollute, and long-term use can have a strong impact on health, causes disease, increases the weight of family and burden on society.
On water supply line, install filter additional and be a kind of economy, effectively handle the mode of water.As the inventor's utility model patent " film filter " (patent No. 200820076015.6), a kind of supply channel terminal that is connected to that comes to this is used for filtering the filter of harmful substance in the running water.The primary structure of this device comprises water inlet, filter chamber, the delivery port that is fixed on one, and it is simple in structure, and is with low cost, easy to use, good filtration effect.
If but our rural area, open-air mountain area tourism or go on business in the country, particularly be in adverse circumstances such as remote districts, earthquake-stricken area, flood area, when not having condition to obtain the piped water supply of safe and sanitary, how to guarantee the necessary drink water of surviving, just become to ensure the matter of utmost importance of our life security.
The utility model content
The technical problems to be solved in the utility model provides a kind of portable film filtering apparatus, by negative pressure suction pre-flock, carry out essence filter through pressurization again, and through the layer by layer filtration, purification of multistage film with filtrate, water purification after repetitive operation can be produced and be filtered.This device can be whenever and wherever possible have the water occasion to use any, and effective harmful substance in the filtered water provides the domestic water of safety and sanitation.It has simple in structure, with low cost, volume is little, lightweight characteristics, is convenient to carry, use, install, dismounting, change convenient.
For solving above-mentioned technical problem, the technical scheme that the utility model adopted is:
A kind of portable film filtering apparatus, comprise and have presetting film filter and having the purification film filter of delivery port of water inlet, it also comprises and will preset the throttling coupling that film filter and purification film filter are connected in one, three's inner chamber communicates, wherein the throttling coupling is for being connected in one and forming by two check valves, threeway, one being straight-through, be connected in after two interfaces of threeway link with a check valve respectively and preset on film filter and the purification film filter, the 3rd interface of throttling coupling is connected with the pressure regulator of adjustable coupler cavity pressure.
Described pressure regulator is a tubular piston extracting and pushing type structure, comprises surge pipe and takes out push rod, and tube chamber is that the radial shape in bar chamber is complementary with the radial section of taking out push rod; An end of taking out push rod places in the bar chamber; The 3rd interface of the other end in bar chamber and throttling coupling is connected.
Described purification film filter, the filtration straight tube that comprises bulging, be provided with the radially smart filtering layer that filters in the cavity, the straight tube two ends are provided with the preceding benefit core that has water inlet and delivery port respectively, the back that are complementary with straight tube and mend core, the joint that straight tube and two is mended cores is mended core, straight tube outer wall and is connected in one with forward and backward two end cap that the outer wall of straight tube is spirally connected or axially pegs graft through ring, and the internal diameter of end cap is complementary with the external diameter of mending core, straight tube.
The described smart two ends that filter filtering layer are provided with in the fixing radial support net of filter chamber wall, and the smart filtering layer that filters comprises at least a in the resinbed that coats with filter cloth, active carbon layer, the functional filter material layer.
Be respectively equipped with between purification film filter filter chamber and two end cap radially that filter membranous layer is preposition filter membranous layer, rearmounted filter membranous layer, filter membranous layer is organic film of inoranic membrane or both sides band supporting network, and its radial dimension is greater than the internal diameter of filter chamber and less than the internal diameter of end cap; Filter membranous layer is circumferentially spacing in end cap inwall place.
Before mend between the supporting network of the nearly filter chamber end of core and drive end bearing bracket, be respectively equipped with forward and backward radially protective film in advance between supporting network that core end and rear end cap are mended in the nearly back of filter chamber; Preceding nearly filter chamber end of mending core is that periphery is embedded in the pre-protective film of the radially first floor of mending the in-core wall, external diameter is between the internal diameter and external diameter of filter chamber straight tube, preceding pre-protective film pastes and is fixed between the drive end bearing bracket supporting network on pre-protective film of the first floor and right side, its periphery is stuck in special-shaped sealing gasket inwall, special-shaped sealing gasket and end cap inwall interference fit; The nearly filter chamber end that core is mended in the back is that periphery is embedded in the radial support net of mending the in-core wall, the net footpath is between the internal diameter and external diameter of filter chamber straight tube, the pre-protective film in back paste and be fixed in about between two supporting networks, its periphery is stuck in special-shaped sealing gasket inwall, special-shaped sealing gasket and end cap inwall interference fit; The composite bed that pre-protective film is formed by stacking for the two-layer at least filter membrane that successively decreases to delivery port direction aperture from water inlet.
Between the nearly inlet end of the supporting network of drive end bearing bracket and filter chamber, the supporting network of rear end cap and back mend between the nearly filter chamber end of core and be respectively equipped with the radial filter sheet, the filter periphery is stuck in special-shaped sealing gasket inwall, special-shaped sealing gasket and end cap inwall interference fit; Filter is a kind of in filter cotton, PP cotton, PE cotton or the NACF.
Resinbed can be substituted by the KDF filter material layer, and perhaps the composite bed of being made up of resinbed, KDF filter material layer axial stratification substitutes.
The described main body that presets film filter is the straight pipe type screen pipe, and an end of filter chamber is mended core with the pre-flock that has delivery port and joined, and the other end is open water inlet; Mend core and screen pipe and be complementary, the pre-flock internal thread end cap through encircling the two outer wall is fixed on one in the outer wall place of the two joint; Filter in the tube chamber and be provided with filter course, filter course comprises pre-protective film, the active carbon layer that sets gradually to the water outlet direction from entry; Filter course circumferentially is limited in the wall of the lumen place, and its axial two ends are because the fixing spacing radial support net of wall of the lumen is spacing; Screen pipe and mend between core along screen pipe and be provided with radially pre-protective film successively, preset filter membranous layer, filter to mending the core direction; Preset filter membranous layer and circumferentially be limited in the end cap inwall, pre-protective film, the filter of its both sides are stuck in the sealing gasket inwall respectively, sealing gasket and end cap interference fit; The joint of mending core and filter is provided with the radial support net, and supporting network circumferentially is limited in mends the in-core wall.
Filter is a kind of in filter cotton, PP cotton, PE cotton or the NACF; Preset the filter membranous layer aperture less than 0.22 μ m; The composite bed that pre-protective film is formed by stacking for the two-layer at least filter membrane that successively decreases to delivery port direction aperture from water inlet.
The portable film filtering apparatus of said structure provided by the utility model, purification film filter wherein and preset the innovative product of film filter for the applicant's utility model patent " film filter " (patent No.: ZL 200820076015.6).They have following characteristics:
Preset film filter and preset the filter membranous layer aperture, can guarantee that bacterium can not pass through less than 0.22 μ m; The filter membrane that pre-protective film is successively decreased by the aperture is formed by stacking, and removes bacterium and greater than the particle matter of bacterium as far as possible.
It is meticulousr that the purification film filter filters rete, passes through the filtration, purification of multiple difference in functionality filter mediums such as KDF, ion-exchange, charcoal absorption, function filter material activation again, makes effluent quality purer.Pre-protective film is that the filter membrane that successively decreases in the aperture is formed by stacking, and removes bacterium as far as possible and greater than the particle matter of bacterium, effectively reduces filtering the pollution of rete.Can remove hardness in the water as ion exchange resin; KDF high-purity copper-zinc particle can be removed the chlorine residue in the water and be dissolved in heavy metal ion and compounds such as lead in the water, mercury, nickel, cadmium, chromium, suppress growing of bacterium, fungi, dirt and algae, effectively prolong the active carbon life-span, thus the service life of membrane component and prolong; Cocoanut active charcoal can effectively be removed chlorine residue in the water, organic matter, heterochromatic, peculiar smell and heavy metal; Functional activation filtrate kind is numerous, has antibiotic, activation, absorption, filters, and also can realize little molecularization, the alkalescentization of water and replenishes in right amount human body beneficial's trace element, makes water have more nutrition, easier being absorbed by the body.
During use, partly immerse in the pending water presetting film filter, the pressure regulator suction sucks filtration system with water, will advance the purification film filter through the water of pre-flock when propelling, and flows out through the essence filter; So repeated multiple times operation obtains water purification, thereby realizes the filtration, purification of water is handled.(during the pressure regulator suction, the triple valve cavity pressure diminishes, and check valve A opens automatically, and this moment, check valve B closed; When propelling, it is big that the triple valve cavity pressure becomes, and check valve B opens automatically, check valve A closes.)
Extraction difficult takes place in the system water process or system water finishes, need preset film filter be installed to the purification film filter the position, carry out backwash as water inlet to presetting film filter with the water purification of just having made; Re-use after can continuing after the backwash to use also replaceable filter membrane.The part that the film filter that other performance and shape are close also can be used as the portable film filtering device is applied.
The piston type pressure regulator can be continous way, also can be discontinuous; Connection between this portable film filtering device each several part can be for pulling and pushing the multiple detachable modes that connect firmly such as clamping, thread connection.
As fully visible, the utility model by negative pressure absorb water pre-flock, carry out essence filter through pressurization again, repeatedly repeatable operation can provide filter back water purification.The obtained technological progress of this device is:
Can there be the water occasion to use any whenever and wherever possible, harmful substance in effective filtered water, water outlet meets national hygiene standard for drinking water, thereby the domestic water of safety and sanitation is provided.It has simple in structure, with low cost, volume is little, lightweight characteristics, is convenient to carry, use, install, dismounting, change convenient.
The utility model is described in further detail below in conjunction with description of drawings and specific embodiment.
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present utility model;
Fig. 2 is the structural representation of purification film filter III among Fig. 1;
Fig. 3 is for presetting the structural representation of film filter IV among Fig. 1.
Among the figure: the I-pressure regulator, II-throttling coupling, III--purification film filter, IV--presets film filter;
101～103-end cap, 201,202-filter chamber body, 301～303-mends core, 401～410-supporting network, 501～503-filter, the pre-protective film of 601～605-, the preposition filter membranous layer of 7-, the rearmounted filter membranous layer of 8-, 9-ion exchange resin/KDF layer, 10-cocoanut active charcoal layer, the special-shaped sealing gasket of 11-functional activity filter material layer, 12-, 131, the 132-water inlet, 141,142-delivery port, 15-presets filter membranous layer, the 16-threeway, and 17-is straight-through;
A, B-check valve;
Arrow is represented water (flow) direction.
The specific embodiment
Embodiment 1
Figure 1 shows that a kind of portable film filtering apparatus, it comprises and has presetting film filter IV and having the purification film filter III of delivery port 141 of water inlet 132 that it also comprises and will preset the throttling coupling II that film filter IV and purification film filter III are connected in one.
Throttling coupling II is connected in one and is formed by two check valve A and B, threeway 16, straight-through 17, the interface of check valve A, B is connected with water inlet 132, delivery port 141 respectively, and the 3rd interface of throttling coupling is connected with the pressure regulator I of adjustable coupler cavity pressure.
Connection between above-mentioned four parts of this portable film filtering device can be for pulling and pushing multiple modes such as clamping, thread connection.
Wherein: pressure regulator is a tubular piston extracting and pushing type structure, comprises surge pipe and takes out push rod, and tube chamber is that the radial shape in bar chamber is complementary with the radial section of taking out push rod; An end of taking out push rod places in the bar chamber; The 3rd interface of the other end in bar chamber and throttling coupling II is connected.The piston type pressure regulator can be continous way, also can be discontinuous.
Purification film filter III as shown in Figure 2.
It comprises water inlet 131, the filter chamber body 201 of bulging, the delivery port 141 that is fixed on one successively.Filter chamber body 201 is a straight tube-like, is provided with the radially smart filtering layer that filters in the cavity, and straight tube 201 two ends are provided with the water inlet 131 that has respectively that is complementary with straight tube 201 and mend core 302 with preceding benefit core 301, the back of delivery port 141; Straight tube 201 and two is mended the joint of core 301,302 and is mended core 301,302 outer walls and straight tube 201 outer walls through ring, and be connected in one with the forward and backward two internal thread end caps 101,102 that the outer wall of straight tube 201 is spirally connected, the internal diameter of end cap 101,102 is complementary with the external diameter of mending core 301,302, straight tube 201.
It is preposition filter membranous layer 7, rearmounted filter membranous layer 8 that 101,102 of filter chamber and two end cap are respectively equipped with radially organic filter membranous layer, and the radial dimension of filter membranous layer 7,8 is greater than the internal diameter of filter chamber and less than the internal diameter of internal thread end cap 101,102; The position between mending between core 301,302 and screen pipe resonator end surface on end cap 101,102 inwalls is provided with radial support net 401,402,405,406, and every end has two-layer supporting network, and filter membranous layer 7 pastes and is fixed in 401,402 of two-layer supporting networks; Filter membranous layer 8 pastes and is fixed in 405,406 of two-layer supporting networks.
The right-hand member of the right-hand member of preceding benefit core 301 and 401 of supporting networks, filter chamber and 405 of supporting networks are respectively equipped with forward and backward radially pre-protective film 602,603; Preceding right part of mending core 301 is that periphery is embedded in the pre-protective film 601 of the radially first floor of mending core 301 inwalls, external diameter is between the inside and outside footpath of straight tube 201, before pre-protective film 602 paste and be fixed in 401 of the supporting networks on pre-protective film 601 of the first floor and right side, its periphery is stuck in special-shaped sealing gasket 12 inwalls, special-shaped sealing gasket and end cap 101 interference fit; The left part that core 302 is mended in the back is that periphery is embedded in the radial support net 407 of mending core 302 inwalls; the net footpath is between between the inside and outside footpath of straight tube 201; the pre-protective film 603 in back paste and be fixed in about 404,405 of two supporting networks; its periphery is stuck in special-shaped sealing gasket 12 inwalls, special-shaped sealing gasket 12 and end cap 102 interference fit.
The smart filtering layer that filters is followed successively by resinbed (or KDF filter material layer) 9, cocoanut active charcoal layer 10, functional filter material layer 11 from left to right; The smart two ends that filter filtering layer are provided with in the fixing radial support net 403,404 of filter chamber wall.
Supporting network 402 and 403,406 and 407 are respectively equipped with radial filter sheet 501,502, and filter 501,502 peripheries are stuck in special-shaped sealing gasket 12 inwalls, special-shaped sealing gasket 12 and end cap 101,102 interference fit.
Filter 501,502 is respectively a kind of in filter cotton, PP cotton, PE cotton or the NACF.
The main body that presets film filter IV is a straight pipe type screen pipe 202, and an end of filter chamber is mended core 303 with the pre-flock that has delivery port 142 and joined, and the other end is open water inlet 132; Mend core 303 and be complementary with screen pipe 202, the pre-flock internal thread end cap 103 through encircling the two outer wall is fixed on one in the outer wall place of the two joint.
Screen pipe is provided with filter course in 202 chambeies, and filter course comprises pre-protective film 604, the cocoanut active charcoal layer 10 that sets gradually to the water outlet direction from entry; Filter course circumferentially is limited in the wall of the lumen place, and its axial two ends are because the fixing spacing radial support net 408,409 in wall of the lumen place is spacing.
Screen pipe 202 and mend 303 in core and be provided with radially pre-protective film 605 successively, preset filter membranous layer 15, filter 503 to mending core 303 directions along screen pipe 202; Preset filter membranous layer 15 and circumferentially be limited in end cap 103 inwalls, the pre-protective film 605 of its both sides, filter 503 are stuck in sealing gasket 12 inwalls respectively, sealing gasket 12 and end cap 13 interference fit; The joint of mending core 303 and filter 503 is provided with radial support net 410, and supporting network 410 circumferentially is limited in mends core 303 inwalls.
Filter 503 is a kind of in filter cotton, PP cotton, PE cotton or the NACF.
The aperture of presetting filter membranous layer 15 is less than 0.22 μ m.
The composite bed that pre-protective film 604,605 is formed by stacking for the two-layer at least filter membrane that successively decreases to delivery port direction aperture from water inlet.
Embodiment 2
Present embodiment does not provide accompanying drawing, the difference of itself and embodiment only be following some:
1. smart filtration filtering layer is followed successively by KDF filter material layer 9 (also can be the composite bed of resinbed and KDF axial stratification that filter material layer is formed), cocoanut active charcoal layer 10, functional filter material layer 11 from left to right.
2. filter membranous layer 7,8 is inorganic film, and both sides can not be provided with supporting network 401,402,405,406.
3. the connecting mode between end cap and screen pipe outer wall changes to be spirally connected and is axial grafting, and promptly the outer wall at end cap inwall and screen pipe is respectively equipped with the raised line, the groove that extend vertically that matches, and it is fixing to peg graft vertically during assembling.
Claims (10)
1, a kind of portable film filtering apparatus, comprise and have presetting film filter and having the purification film filter of delivery port of water inlet, it is characterized in that: it also comprises and will preset the throttling coupling that film filter and purification film filter are connected in one, three's inner chamber communicates, wherein the throttling coupling is by two check valves, a threeway, one straight-through is connected in one and forms, be connected in after two interfaces of threeway link with a check valve respectively and preset on film filter and the purification film filter, the 3rd interface of throttling coupling is connected with the pressure regulator of adjustable coupler cavity pressure.
2, portable film filtering apparatus according to claim 1 is characterized in that: described pressure regulator is a tubular piston extracting and pushing type structure, comprises surge pipe and takes out push rod, and tube chamber is that the radial shape in bar chamber is complementary with the radial section of taking out push rod; An end of taking out push rod places in the bar chamber; The 3rd interface of the other end in bar chamber and throttling coupling is connected.
3, portable film filtering apparatus according to claim 1 and 2, it is characterized in that: described purification film filter, the filtration straight tube that comprises bulging, be provided with the radially smart filtering layer that filters in the cavity, the straight tube two ends are provided with the preceding benefit core that has water inlet and delivery port respectively, the back that are complementary with straight tube and mend core, the joint that straight tube and two is mended core is connected in one through encircling the forward and backward two end cap of mending core, straight tube outer wall and being spirally connected or axially pegging graft with the straight tube outer wall, and the internal diameter of end cap is complementary with the external diameter of mending core, straight tube.
4, portable film filtering apparatus according to claim 3, it is characterized in that: the described smart two ends that filter filtering layer are provided with in the fixing radial support net of filter chamber wall, and the smart filtering layer that filters comprises at least a in the resinbed that coats with filter cloth, active carbon layer, the functional filter material layer.
5, portable film filtering apparatus according to claim 4, it is characterized in that: being respectively equipped with radially between filter chamber and two end cap, filter membranous layer is preposition filter membranous layer, rearmounted filter membranous layer, filter membranous layer is the organic film of inoranic membrane or both sides band supporting network, and its radial dimension is greater than the internal diameter of filter chamber and less than the internal diameter of end cap; Filter membranous layer is circumferentially spacing in end cap inwall place.
6, portable film filtering apparatus according to claim 4 is characterized in that: between the supporting network of nearly filter chamber end of preceding benefit core and drive end bearing bracket, the near back of filter chamber mends and be respectively equipped with forward and backward radially protective film in advance between the supporting network of core end and rear end cap; Preceding nearly filter chamber end of mending core is that periphery is embedded in the pre-protective film of the radially first floor of mending the in-core wall, external diameter is between the internal diameter and external diameter of filter chamber straight tube, preceding pre-protective film pastes and is fixed between the drive end bearing bracket supporting network on pre-protective film of the first floor and right side, its periphery is stuck in special-shaped sealing gasket inwall, special-shaped sealing gasket and end cap inwall interference fit; The nearly filter chamber end that core is mended in the back is that periphery is embedded in the radial support net of mending the in-core wall, the net footpath is between the internal diameter and external diameter of filter chamber straight tube, the pre-protective film in back paste and be fixed in about between two supporting networks, its periphery is stuck in special-shaped sealing gasket inwall, special-shaped sealing gasket and end cap inwall interference fit; The composite bed that pre-protective film is formed by stacking for the two-layer at least filter membrane that successively decreases to delivery port direction aperture from water inlet.
7, portable film filtering apparatus according to claim 4, it is characterized in that: between the nearly inlet end of the supporting network of drive end bearing bracket and filter chamber, the supporting network of rear end cap and back mend between the nearly filter chamber end of core and be respectively equipped with the radial filter sheet, the filter periphery is stuck in special-shaped sealing gasket inwall, special-shaped sealing gasket and end cap inwall interference fit; Filter is a kind of in filter cotton, PP cotton, PE cotton or the NACF.
8, according to each described portable film filtering apparatus among the claim 4-7, it is characterized in that: resinbed is substituted by the KDF filter material layer, and is perhaps alternative in the composite bed of being made up of resinbed and KDF filter material layer axial stratification.
9, portable film filtering apparatus according to claim 1 and 2 is characterized in that: the described main body that presets film filter is the straight pipe type screen pipe, and an end of filter chamber joins with the benefit core that has delivery port, and the other end is open water inlet; Mend core and screen pipe and be complementary, the pre-flock internal thread end cap through encircling the two outer wall is fixed on one in the outer wall place of the two joint; Filter in the tube chamber and be provided with filter course, filter course comprises pre-protective film, the active carbon layer that sets gradually to the water outlet direction from entry; Filter course circumferentially is limited in the wall of the lumen place, and its axial two ends are because the fixing spacing radial support net of wall of the lumen is spacing; Screen pipe and mend between core along screen pipe and be provided with radially pre-protective film successively, preset filter membranous layer, filter to mending the core direction; Preset filter membranous layer and circumferentially be limited in the end cap inwall, pre-protective film, the filter of its both sides are stuck in the sealing gasket inwall respectively, sealing gasket and end cap interference fit; The joint of mending core and filter is provided with the radial support net, and supporting network circumferentially is limited in mends the in-core wall.
10, portable film filtering apparatus according to claim 9 is characterized in that: filter is a kind of in filter cotton, PP cotton, PE cotton or the NACF; Preset the filter membranous layer aperture less than 0.22 μ m; The composite bed that pre-protective film is formed by stacking for the two-layer at least filter membrane that successively decreases to delivery port direction aperture from water inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201029336U CN201404769Y (en) | 2009-05-26 | 2009-05-26 | Portable membrane filtering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201029336U CN201404769Y (en) | 2009-05-26 | 2009-05-26 | Portable membrane filtering device |
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| Publication Number | Publication Date |
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| CN201404769Y true CN201404769Y (en) | 2010-02-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009201029336U Expired - Fee Related CN201404769Y (en) | 2009-05-26 | 2009-05-26 | Portable membrane filtering device |
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| CN (1) | CN201404769Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101559301B (en) * | 2009-05-26 | 2011-06-22 | 赵新力 | Portable film filtering apparatus |
-
2009
- 2009-05-26 CN CN2009201029336U patent/CN201404769Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101559301B (en) * | 2009-05-26 | 2011-06-22 | 赵新力 | Portable film filtering apparatus |
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Granted publication date: 20100217 Termination date: 20120526 |