KR200236635Y1 - Water Treatment Filter - Google Patents

Abstract

The present invention relates to a water treatment filter used to filter out foreign substances or harmful substances contained in domestic or industrial water to obtain clean water.

The filter for water treatment of the present invention has a filtration range of 0.1-0.8 μm by hot press molding thermoplastic resin particles such as polypropylene, polyamide, polyester, teflon, polymethacrylate, polyacrylonitrile, polystyrene and polycarbonate. There is a technical feature in that the non-woven filter 22 is formed by spinning the thermoplastic resin directly to the outer peripheral surface of the porous precision filter 21 manufactured to have a.

The filter for water treatment according to the present invention does not require a separate core for supporting the filter because the porous precision filter plays a role of the support core together with the role of the filter, and the nonwoven fabric filter having the porous precision filter formed outside thereof. By forming a double filter layer together there is an advantage that can improve the filtration precision and filtration rate.

In addition, the filter for water treatment according to the present invention has a structure in which the nonwoven filter is laminated on the outer circumferential surface of the porous precision filter by direct injection, thereby ensuring a reliable bonding at the interface between these two filter layers, thereby preventing separation between the filter layers. .

Description

Water Treatment Filter

The present invention relates to a filter for water treatment that filters foreign substances or harmful substances contained in water, and more particularly, a thermoplastic resin is formed on an outer circumferential surface of a porous precision filter made of a thermoplastic resin having micropores therein and having sufficient strength as a support. The present invention relates to a water treatment filter having a double filter structure in which a nonwoven filter is laminated by spinning injection.

Due to the overcrowding of the population, the increase in the amount of detergents used and the inflow of wastewater, the quality of the water supply has decreased compared to the past. As the content of harmful components is increased, the situation is required to counter these.

As one of the most representative countermeasures that can be taken by the user of water against such water pollution, water purifiers or water purifiers are generally installed to filter out foreign substances contained in the water. Has been developed and used.

Figure 1 is a longitudinal cross-sectional view schematically showing the structure of the cylindrical filter type water purifier, Figure 2 is an exploded perspective view showing a separate cylindrical filter used in the apparatus of Figure 1, based on the water purification process and filter structure of the conventional water purifier Looking at it as follows.

As shown, the conventional water purifier has a vertical separation partition (2) (2 ') formed inside the sealed outer housing (1), the chamber 3 is provided therebetween, a plurality of cylindrical filters inside the chamber (3) (4) is installed, on the outer peripheral surface of the chamber (3) side of the outer housing (2), a water inlet (5) for supplying water to the chamber (3) is formed and the water purification is located below the lower separation partition (2 '). On the outer circumferential surface of the storage tank 6, a water purification outlet 7 for water extraction is provided.

At this time, the cylindrical filter 4 is composed of a core 8 having a plurality of through holes 8a densely arranged on the outer circumferential surface thereof as shown in FIG. The winding filter 9 formed by winding the fiber yarn to a predetermined thickness is coupled, while the nonwoven fabric 10 is interposed between the core 8 and the winding filter 9.

The water purification process in the conventional water purifier having such a structure, first, the water introduced into the chamber 3 through the water inlet 5 is cylindrical filter (4) by the water pressure maintained in the chamber (3) In the process of flowing through the winding filter (9) and the nonwoven fabric 10 of the inside of the core (8) to remove the foreign matter contained in the water is made, the foreign matter introduced into the core 8 in the filtered state The water is discharged to the purified water outlet 7 through the purified water storage tank 6 is made of purified water.

That is, in the structure of the conventional cylindrical filter 4, the filtration action of foreign matters is made in the winding filter 9 wound in a cylindrical shape, and the core 8 located therein moves the winding filter 9 to the chamber 3. The water flowing through the winding filter 9 is introduced through the through hole 8a formed in the main surface of the support along with the role of the supporter to be fixedly installed at a predetermined position within the chamber 3. It serves as a purified water flow path to be moved to the outlet (7).

In addition, the nonwoven fabric 10 interposed between the winding filter 9 and the core 8 indicates that the lint b separated from the yarn constituting the winding filter 9 flows into the core 8. It serves to block. For reference, synthetic fiber yarns such as polypropylene and polyethylene constituting the winding filter 9 in the cylindrical filter must have a fine lint to perform the filtration function on the foreign matter, and the lint is easy to fall off from the yarn. have.

On the other hand, the conventional cylindrical filter is composed of three components, the core 8 located inside, the winding filter 9 on the outside thereof and the nonwoven fabric 10 interposed therebetween, and the core 8 is simply It has been pointed out that the filtration efficiency is not satisfactory as it takes a structure in which filtration is performed only by the winding filter 9 only as a supporter.

In addition, in the cylindrical filter, the nonwoven fabric 10 interposed between the core 8 and the winding filter 9 does not properly block some fine lint b and passes through the nonwoven fabric 10 into the core 8. In some cases, there is a problem that lint remains in the purified water passed through the cylindrical filter (4).

In the conventional cylindrical filter, the lint b separated from the outer circumferential surface of the winding filter 9 enters into the water in the chamber 3, and the amount of the lint b is increased in proportion to the passage of time. Eventually, there is a disadvantage in that the filtration efficiency of the water purifier decreases or causes a malfunction.

The present invention is to solve the problems that are pointed out in the conventional cylindrical filter, the thermoplastic resin is injected into the outer peripheral surface of the porous precision filter made of a thermoplastic resin with micropores therein to combine the non-woven filter layer through the filter The purpose of the present invention is to provide a water treatment filter which improves the precision and filtration rate of the filtration by performing the filtration step by step for the water.

Another object of the present invention is to construct a filter for water treatment using a double filter of a porous precision filter and a nonwoven fabric filter, thereby forming a nonwoven filter layer by directly injecting a thermoplastic resin to the outer circumferential surface of the porous precision filter to form a close contact at the interface between the two filter layers. It is to provide a filter for water treatment to maintain the adhesive state to prevent separation between filter layers.

1 is a longitudinal sectional view showing a schematic structure of a general water purifier

Figure 2 is an exploded perspective view showing the structure of a conventional water filter.

Figure 3 is a partially cutaway perspective view showing an embodiment of the filter structure for water treatment of the present invention.

Figure 4 is a perspective view of one embodiment of a porous precision filter of the present invention.

((Description of the code for the main part of the drawing))

20. Cylindrical filter 21. Porous precision filter

22. Nonwoven Filters c.s. Rough side

The above object of the present invention is to form fine pores therein in molding into a cylindrical shape using a thermoplastic resin such as polypropylene, polyamide, polyester, Teflon, polymethacrylate, polyacrylonitrile, polystyrene and polycarbonate It is achieved by a structure consisting of a porous precision filter and a nonwoven filter formed by spinning the same thermoplastic resin as the porous precision filter on the outer circumferential surface of the porous precision filter.

The porous precision filter has a higher melting point than the melting point of the thermoplastic resin having a low melting point in the process of mixing the micro-sized particles consisting of two kinds of thermoplastic resins having different melting points and then pressing them into a predetermined shape in the mold. By melting to a temperature lower than the melting point, the melting of the thermoplastic resin of the low melting point occurs so that the molten resin serves as an adhesive to connect the particles in the unmelted state is formed into a porous precision filter.

The pores of the porous core obtained through this hot press forming process are connected to each other throughout the internal structure, and the pore size is maintained in a precise range of 0.1-0.8 μm, and this range is in the filtration range of the precision filter. Corresponding.

The control of the filtration range is made by controlling the variables such as the particle size of the raw material resin particles and the pressure, temperature and holding time during the molding and pressing process.

Next, the nonwoven filter which forms a characteristic component of the inventive water treatment filter heats thermoplastic resins such as polypropylene, polyamide, polyester, teflon, polymethacrylate, polyacrylonitrile, polystyrene, and polycarbonate. In the molten state, and is molded by spraying on a porous precision filter serving as a target surface located in front of the spray nozzle.

At this time, the resin yarns, such as spider webs, sprayed from the nozzles are attached to the target surface irregularly entangled to form a nonwoven filter layer while undergoing a solidification process.

Matters relating to the above object and technical configuration of the present invention water treatment filter, and the resulting effects thereof will be clearly understood by the following detailed description with reference to the drawings showing preferred embodiments of the present invention.

Figure 3 is a partially cutaway perspective view of an embodiment water treatment filter of the present invention, Figure 4 is a perspective view of an embodiment porous precision filter of the present invention.

As shown, the cylindrical filter 20 of the present invention has a structure in which the nonwoven filter 22 is laminated on the outer circumferential surface of the porous precision filter 21.

The porous precision filter 21 has a filtration range of 0.1-0.8 μm because there are micropores connected to each other in the form of a cylindrical body or a pipe, and is manufactured through a hot compression molding process of thermoplastic resin particles, thereby providing high strength. Since also serves as a support core. In addition, the thickness of the porous precision filter 21 is preferably in the range of 8 to 20 mm as a thickness capable of having sufficient strength as a support for the nonwoven filter 22.

The outer circumferential surface of the porous precision filter 21 is advantageously formed with a rough surface (c.s.) to prevent slippage of the nonwoven filter 22 formed by spinning injection thereon. The rough surface cs is formed by forming the inner surface of the metal mold used in forming the porous precision filter 21 into a rough surface, so that the outer circumferential surface of the porous precision filter 21 formed through the mold work is rough. You will be able to achieve this. As a specific form of the rough surface (c.s.), a variety of methods may be applied, including a form in which parallel protrusions are formed at regular intervals on the outer circumferential surface, or small protrusions are formed at several places on the surface.

Next, the non-woven fabric filter 22 formed on the outer circumferential surface of the porous precision filter 21 is a cylindrical structure formed by solidifying in a state where the thermoplastic resin yarns spun onto the outer circumferential surface of the porous precision filter 21 are irregularly entangled. Various changes are possible.

In addition, the filtration accuracy of the nonwoven fabric filter 22 is inferior to that of the porous precision filter 21 located therein. For example, the filtration range of the nonwoven fabric filter 22 is represented to 1-3 μm.

Looking at the filtration process of the filter for water treatment of the present invention made of such a structure as follows. First, the water is primarily filtered by passing the nonwoven filter 22 formed outside the cylindrical filter 20 by the hydraulic pressure applied to the water filled in the chamber, wherein the nonwoven filter 22 Since the filtration range is relatively low in precision, foreign particles or harmful substances of relatively large particles contained in the water are filtered in the process of passing through the nonwoven filter 22, and the fine foreign substances or harmful substances are filtered into the porous precision filter (21). Headed to).

Next, the water introduced through the nonwoven fabric filter 22 passes through the filtration process again in the process of passing through the porous precision filter 21 located therein. In this case, the porous precision filter 21 has a high precision filtration range. The fine particles which are not filtered by the nonwoven fabric filter 22 of the previous stage are filtered out.

At this time, some lint occurs in the nonwoven fabric filter 22 and may be directed toward the porous precision filter 21 in the filtration process, but such lint is caught on the outer circumferential surface of the porous precision filter 21 and introduced into the precision filter 21. Is blocked.

As described above, in the water treatment filter structure according to the present invention, the porous precision filter located inside has a core support function as it exhibits the strength required as a support while having micropores therein through hot press molding of thermoplastic resin particles. In addition to performing the filter function and at the same time, the non-woven filter located on the outside is filtered in comparison with the cylindrical filter which is filtered by the conventional filter only by the two-step filtration process by the double filter structure in which the filtration is first performed. It is possible to expect improved filtration efficiency, as well as to improve the filtration speed.

In addition, the water treatment filter according to the present invention is formed by stacking thermoplastic resin directly on the outer circumferential surface of the porous precision filter constituting the inner layer in the double filter structure to improve adhesion between filter layers to generate more precise and higher flow rates. In addition, there is an advantage that the filter layers can be prevented from being separated from each other.

Claims (1)

In the water treatment filter, the thermoplastic resin particles are hot-pressed to form a cylindrical precision porous filter 21 having a filtration range of 0.1 to 0.8 μm, and by radial injection of thermoplastic resin on the outer circumferential surface of the porous precision filter 21. Stacked, the filter for water treatment, characterized in that composed of a non-woven filter (22) having a lower filtration range than the filtration range of the porous precision filter (21).