CN209872555U

CN209872555U - Composite filter element

Info

Publication number: CN209872555U
Application number: CN201920267516.0U
Authority: CN
Inventors: 任富佳; 刘冲; 何军; 郁明跃
Original assignee: Hangzhou Robam Appliances Co Ltd
Current assignee: Hangzhou Robam Appliances Co Ltd
Priority date: 2019-03-04
Filing date: 2019-03-04
Publication date: 2019-12-31
Anticipated expiration: 2029-03-04

Abstract

The utility model provides a composite filter element, along raw water side to producing water side direction composite filter element's filter core aperture grow gradually, one side that is close to the raw water side is equipped with washes the runner, washes the runner and is suitable for and washes and be linked together with composite filter element's waste water mouth the raw water side. The utility model has the advantages that: the filtering precision of the composite filter element is gradually reduced layer by layer, so that the resistance of filtered water during filtering is greatly reduced, and the water production flux is improved.

Description

Composite filter element

Technical Field

The utility model relates to a purify the water field, more specifically say and relate to a composite filter element.

Background

With the increasing aggravation of environmental pollution, drinking water of people is greatly threatened, so that household water purifying equipment is in explosive growth in China. Although the core of a common household water purifier is a reverse osmosis filter element, the service life of the reverse osmosis filter element is greatly influenced by the use of a front filter element. At present, most of the mainstream preposed filter elements adopt PP and activated carbon filter elements for two-stage filtration or the combination of the PP and the activated carbon filter elements, the PP is mainly used for filtering particle impurities such as silt in water, and the activated carbon filter elements are mainly used for adsorbing residual chlorine in water. The filtration precision of the pre-pretreatment process is improved layer by layer until reverse osmosis removes ions in water to obtain pure water; the filter element has the defects that small particle impurities in water can penetrate through the PP filter element to reach the activated carbon filter element, the aperture of the activated carbon filter element is small, and the small particle impurities can be intercepted, so that the phenomenon that the PP and the activated carbon filter element are easily polluted and blocked is caused, and the service life of the front filter element is short.

Disclosure of Invention

The utility model overcomes not enough among the prior art provides a composite filter element, through putting the membrane that the precision is the highest outmost in order to realize that the first step just filters the effect of the overwhelming majority impurity of former aquatic, has avoided a large amount of impurity to get into the filter core inlayer, causes the dirty stifled phenomenon of filter core, has prolonged the life of filter core.

The purpose of the utility model is realized by the following technical scheme.

The utility model provides a composite filter element, includes former water side and product water side in proper order along its water purification direction, follows former water side extremely produce water side direction composite filter element's filter core aperture grow gradually, is close to one side of former water side is equipped with washes the runner, it is right to wash the runner former water side wash and with composite filter element's waste water mouth is linked together.

Further, the outmost ultrafiltration membrane that is of composite filter element, ultrafiltration membrane circumference is sunken by a plurality of folds and a plurality of folds are protruding alternately to be connected and is constituteed, the fold is sunken to be used for receiving the dirt, the fold is protruding to be used for producing water.

Furthermore, the ultrafiltration membrane is a flat ultrafiltration membrane, and the pore diameter of the ultrafiltration membrane is 0.1-0.5 μm.

Furthermore, the composite filter element also comprises an activated carbon layer, wherein the activated carbon layer is attached to the inner side of the ultrafiltration membrane, and is sintered activated carbon with the aperture of 1-5 μm.

Further, the filter element further comprises a PP filter element layer, wherein the PP filter element layer is attached to the inner side of the activated carbon layer, the PP filter element layer is supported by a cylindrical porous support plate, and a filter water channel is formed on the inner side of the porous support plate.

Furthermore, the PP filter element layer is a folding PP filter element, and the aperture of the PP filter element layer is 5-10 mu m.

Furthermore, a washing flow channel is arranged between the ultrafiltration membrane and the filter bottle.

Further, the width of the flushing runner is 1-5 mm.

Furthermore, the bottom of the filter element is connected with the filter flask through a bottom plate, and a plurality of water outlet flow channels are arranged on the bottom plate.

Furthermore, an electromagnetic valve is arranged at the position, close to the waste water port of the filter flask, of the filter element.

The utility model has the advantages that:

the filtering precision of the composite filter element is gradually reduced layer by layer, so that the resistance of filtered water during filtering is greatly reduced, and the water production flux is improved; the ultrafiltration membrane has small aperture and high filtration precision, most impurities in raw water can be intercepted on the surface of the ultrafiltration membrane, so that the impurities can be effectively prevented from permeating, and an active carbon filter element is blocked, thereby prolonging the service life of the active carbon filter element; the ultrafiltration membrane adopts a folding design, and the effective area of the ultrafiltration membrane is increased by increasing folds, so that the production flux is improved; meanwhile, the fold concave part is used for receiving impurities in raw water, so that the dirt holding capacity of the ultrafiltration membrane is improved, and the fold convex part can still produce water due to less impurities; the PP filter core layer reduces hydraulic resistance, simultaneously prevents activated carbon powder from leaking, and protects the booster pump from being blocked by dirt; the utility model discloses a narrow runner design is adopted in the clearance of filter core and filter flask, when the filter core washed, can utilize the membrane surface high velocity of flow, washed the membrane surface, alleviates the membrane face and pollutes, improves the product flux, extension filter core life.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;

FIG. 2 is a sectional view of the plane A-A' of example 1 of the present invention;

FIG. 3 is an enlarged schematic view of the structure of an ultrafiltration membrane;

FIG. 4 is a schematic view of a composite cartridge waterway;

FIG. 5 is a schematic view of the composite filter element with gradually increasing pore sizes;

fig. 6 is a schematic structural diagram of embodiment 2 of the present invention;

fig. 7 is a cross-sectional view taken along the plane a-a' of embodiment 2 of the present invention;

in the figure:

1. ultrafiltration membranes; 2. an activated carbon layer; 3. a PP filter layer; 4. a porous support plate; 5. the folds are sunken; 6. the folds are raised; 7. a filter flask; 8. flushing the flow channel; 9. a base plate; 10. a water outlet flow channel; 11. an electromagnetic valve; 12. a water inlet; 13. a filtered water channel; 14. a waste water port; 15. washing water; 16. raw water side; 17. a water producing side; 18. impurities.

Detailed Description

The technical solution of the present invention is further explained by the following specific examples.

In the description of the present invention, it should be noted that the terms "inside", "outside", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

Example 1

As shown in fig. 1, 2, 3, 4 and 5, the filter element is arranged in a filter bottle 7, the filter element sequentially comprises a raw water side 16 and a water producing side 17 along a water purifying direction, the filter element aperture of the composite filter element is gradually enlarged along the direction from the raw water side 16 to the water producing side 17, a flushing flow channel 8 is arranged at one side close to the raw water side 16, and the flushing flow channel 8 is suitable for flushing the raw water side 16 and is communicated with a waste water port 14 of the composite filter element; this filter core includes milipore filter 1 and activated carbon layer 2, the filter core includes milipore filter 1 and activated carbon layer 2, and the laminating of milipore filter 1 is in the activated carbon layer 2 outsides, and activated carbon layer 2 inboard forms filtration water channel 13.

The ultrafiltration membrane 1 is formed by alternately connecting a plurality of fold recesses 5 and a plurality of fold protrusions 6, wherein the fold recesses 5 are used for receiving dirt, and the fold protrusions 6 are used for producing water; the outer layer ultrafiltration membrane 1 has the highest filtration precision, can intercept most impurities in water and reduce the subsequent pollution pressure;

in the embodiment, the ultrafiltration membrane 1 is a flat ultrafiltration membrane, the aperture of the ultrafiltration membrane is 0.1-0.5 μm, particles above colloid in water can be intercepted, and the activated carbon is protected from being polluted; the activated carbon layer 2 is sintered activated carbon with the aperture of 1-5 mu m, and scale inhibitor is added into the activated carbon, so that scale inhibiting components are slowly released while residual chlorine is adsorbed, and the RO filter core is ensured not to be polluted by scale;

the composite filter element is arranged in the filter bottle 7, a flushing flow channel 8 is arranged between the ultrafiltration membrane 1 and the filter bottle 7, the width of the flushing flow channel 8 is 1-5 mm, the width of the water inlet 12 of the filter bottle 7 is larger than that of the flushing flow channel 8, on the premise of ensuring sufficient water inflow, water flow enters the flushing flow channel 8 with the narrowed width from the wider water inlet 12, at the moment, the water flow speed is instantly increased, the membrane surface flow rate during flushing and discharging is improved, the membrane surface shearing force is increased, and membrane surface pollution is reduced;

the bottom of the composite filter element is connected with the filter flask 7 through a bottom plate 9, and a plurality of water outlet flow channels 10 are arranged on the bottom plate 9; the waste water mouth that composite filter element is close to filter flask 7 is equipped with solenoid valve 11, through regularly switching solenoid valve 11, realizes regularly washing milipore filter 1.

The filter element also comprises a PP filter element layer 3, the PP filter element layer 3 is attached to the inner side of the activated carbon layer 2, the PP filter element layer 3 is supported by a cylindrical porous support plate 4, and the inner side of the porous support plate 4 forms a filtering water channel 13.

In the embodiment, the precision of the PP filter element layer 3 is the lowest, the hydraulic resistance is reduced, and the sufficient filtered water quantity is ensured; the PP filter element layer 3 is a folding PP filter element, the PP filter element 3 is supported by the cylindrical porous support plate 4, the pore diameter of the PP filter element is 5-10 mu m, the pore diameter distribution of the folding PP filter element is narrower and far lower than that of a non-woven fabric, and the leakage of active carbon filter element powder into the booster pump to cause pollution and blockage is effectively avoided while the hydraulic resistance is reduced.

The working process is as follows: as shown in fig. 4, when in use, raw water is filled in the filter flask 7 from the water inlet 12 through the washing flow channel 8, the raw water sequentially passes through the outermost ultrafiltration membrane 1, the activated carbon filter element 2 and the PP filter element 3, and filtered water is obtained through three-layer filtering, and the filtered water is discharged from the filtered water channel 13 through the porous support plate 4; when the composite filter element needs to be cleaned, the electromagnetic valve 11 is opened, the washing water 15 is introduced into the washing flow channel 8 from the water inlet 12 and flows out to the waste water outlet 14 to be discharged, impurities at the fold depression 5 of the ultrafiltration membrane 1 are washed away by the water flow, and the flux is recovered.

Example 2

The composite filter element shown in fig. 6 and 7 is different from the embodiment 1 in that the filter element only comprises an ultrafiltration membrane 1 and an activated carbon layer 2, the filter element comprises the ultrafiltration membrane 1 and the activated carbon layer 2, the ultrafiltration membrane 1 is attached to the outer side of the activated carbon layer 2, and a filtered water channel 13 is formed on the inner side of the activated carbon layer 2.

The working process is as follows: as shown in fig. 4, when in use, raw water flows through the flushing flow channel 8 from the water inlet 12 to fill the filter bottle 7, the raw water passes through the outermost ultrafiltration membrane 1 and the activated carbon filter element 2 in sequence, filtered water is obtained, and the filtered water flows through the filtered water channel 13; when the composite filter element needs to be cleaned, the electromagnetic valve 11 is opened, the washing water 15 is introduced into the washing flow channel 8 from the water inlet 12 and flows out to the waste water outlet 14 to be discharged, impurities at the fold depression 5 of the ultrafiltration membrane 1 are washed away by the water flow, and the flux is recovered.

The above two embodiments of the present invention have been described in detail, but the above description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. The utility model provides a composite filter element, includes former water side and product water side, its characterized in that in proper order along its water purification direction: follow former water side extremely produce water side direction composite filter's filter core aperture grow gradually, is close to one side of former water side is equipped with washes the runner, it is right to wash the runner be suitable for former water side wash and with composite filter's waste water mouth is linked together.

2. The composite filter element of claim 1, wherein: the outmost ultrafiltration membrane that is of composite filter element, ultrafiltration membrane circumference is sunken by a plurality of folds and a plurality of folds are protruding to be connected in turn and is constituteed, the fold is sunken to be used for receiving the dirt, the fold is protruding to be used for producing water.

3. The composite filter element of claim 2, wherein: the ultrafiltration membrane is a flat ultrafiltration membrane, and the aperture of the ultrafiltration membrane is 0.1-0.5 μm.

4. The composite filter element of claim 2, wherein: the composite filter element further comprises an activated carbon layer, wherein the activated carbon layer is attached to the inner side of the ultrafiltration membrane, and is sintered activated carbon with the aperture of 1-5 microns.

5. The composite filter element of claim 4, wherein: the filter element further comprises a PP filter element layer, the PP filter element layer is attached to the inner side of the activated carbon layer, the PP filter element layer is supported by a cylindrical porous support plate, and a filter water channel is formed on the inner side of the porous support plate.

6. The composite filter element of claim 5, wherein: the PP filter core layer is a folded PP filter core, and the aperture of the folded PP filter core layer is 5-10 mu m.

7. The composite filter element of claim 2, wherein: the composite filter element is arranged in a filter flask, and a washing flow channel is arranged between the ultrafiltration membrane and the filter flask.

8. The composite filter element of claim 7, wherein: the width of the flushing runner is 1-5 mm.

9. The composite filter element of claim 7, wherein: the bottom of the filter element is connected with the filter flask through a bottom plate, and a plurality of water outlet flow channels are arranged on the bottom plate.

10. The composite filter element of claim 9, wherein: and an electromagnetic valve is arranged at the position, close to the wastewater outlet of the filter flask, of the filter element.