JPH0639188U - Water purifier - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the growth of bacteria and to prevent the flow rate from decreasing. A filter means 7 having both a hydrophilic part 5 and a hydrophobic part 6 is provided in the inflow part 3, and the hydrophobic part 6 of the filter part 7 is provided.
The gas that has passed through is discharged from the exhaust valve 15 provided in the water purifier body 2, while the liquid that has passed through the hydrophilic portion 5 is discharged into the water purifier body 2
It is characterized in that it flows in.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a water purifier attached to, for example, a domestic water tap.

[0002]

[Prior art]

 Examples of conventional water purifiers of this type include the following. In order to prevent a decrease in the flow rate due to the entrained air, a membrane module with a hydrophobic part as the main body of the water purifier was placed after the activated carbon module, that is, on the downstream side.

[0003]

[Problems to be solved by the device]

 However, in the case of the above-mentioned conventional technique, the air mixed in the main body of the water purifier exists until the final stage of the water purifier. In addition, if unused for a long time, fungi could grow on the activated carbon module. In this case, aerobic bacteria are particularly likely to reproduce. In that case, the number of bacteria on the raw water side of the membrane module, which is the filtration mechanism, increased significantly, and there was a possibility that the flow rate would decrease due to clogging and defects such as outflow of bacteria would occur.

Further, even if the order of the activated carbon and membrane modules is reversed, it is not possible to prevent the growth of bacteria due to the influx of bacteria from a faucet such as a domestic water tap when not in use. It leads to the outflow of bacteria and is not suitable for obtaining drinking water.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and an object of the present invention is to provide a water purifier capable of preventing the growth of bacteria and a decrease in the flow rate. is there.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention comprises a water purifier body for purifying raw water, and the water purifier body has an inflow portion for flowing the raw water into the water purifier body and an outflow for discharging the purified water. In the water purifier having a section, the inflow section is provided with a filtering means having both a hydrophilic section and a hydrophobic section, and the gas passing through the hydrophobic section of the filtering means is provided in the water purifier body. It is characterized in that the liquid discharged from the exhaust valve and passing through the hydrophilic part flows into the water purifier body.

[0007]

[Action]

 In the water purifier having the above-mentioned configuration, since the inflow portion of the water purifier body is provided with the filtering means having both the hydrophilic portion and the hydrophobic portion, the air passes through the hydrophobic portion and the water purifier Air is not introduced into the main body of the water purifier because it is exhausted through the exhaust valve provided in the main body. Therefore, it is possible to prevent the growth of bacteria inside the water purifier body, and to prevent a decrease in the flow rate due to the clogging of bacteria or the inclusion of air.

[0008]

【Example】

 The present invention will be described below based on the illustrated embodiment. 1 to 3 showing a water purifier according to an embodiment of the present invention, FIG. 1 is a schematic view of a water purifier based on the present invention, 1 is a water purifier, and this water purifier 1 is In general, a water purifier body 2 for purifying raw water is provided, and the water purifier body 2 has an inflow part 3 for inflowing raw water into the water purifier body 2 and an outflow part 4 for outflowing purified water. Is provided with a pre-filter 7 as a filtering means having both a hydrophilic pre-filter 5 as a hydrophilic part and a hydrophobic pre-filter 6 as a hydrophobic part.

The water purifier main body 2 is composed of a case 8 having an internal hollow, an activated carbon module 9 as an adsorbing section housed in the case 8 and a membrane module 10 as a filtration module.

The case 8 is a cylindrical member that is hollow inside and has both ends closed, and the inside of the hollow has a circular cross section. An inflow portion 3 penetrating the closed portion is provided substantially at the center in the radial direction of the closed portion at one end. The inflow portion 3 projects axially outward from the end portion of the case 8. Further, an outflow portion 4 penetrating the closed portion is provided substantially at the center in the radial direction of the closed portion at the other end. As for the closed portions at both ends, the closed portion having the inflow portion 3 is thicker.

Then, the activated carbon module 9 is housed in the hollow inside of the case 8 on the upstream side, and the membrane module 10 is housed in series on the downstream side so that the volume is half. The activated carbon module 9 mainly removes unpleasant odors such as chlorine and musty, and the membrane module 10 mainly functions to remove fine particles such as fungi and red rust that propagate in the activated carbon.

In the membrane module 10, a bundle of a large number of hollow fiber membranes 11 as a filtration membrane is folded in two and the potting agent 12 is used at the unbroken end of the bundle of hollow fiber membranes 11. By sealing and fixing the gaps between the hollow fiber membranes 11, the ends of the hollow fiber membranes 11 and the hardened potting agent 12 are cut together, and the ends of the hollow fiber membranes 11 are opened and modularized. An O-ring 14 in the potting portion 13 is housed on the downstream side of the case 8 so that it is completely shielded from the outside air.

The inflow portion 3 of the case 8 has a circular cross section, and the prefilter 7 is provided in the inflow portion 3 substantially on the same plane as the end surface of the case 8. FIG. 2 is a plan view seen from above the pre-filter 7.

The pre-filter 7 includes both the hydrophilic pre-filter 5 and the hydrophobic pre-filter 6, and the hydrophilic pre-filter 5 has a circular shape having a diameter substantially the same as the inner diameter of the inflow part 3 and is hydrophobic. The hydrophilic pre-filter 6 is arranged inside the hydrophilic pre-filter 5 in parallel with the hydrophilic pre-filter 5. In this embodiment, the hydrophobic prefilter 6 is arranged near the peripheral surface of the hydrophilic prefilter 5. The hydrophilic prefilter 6 has a circular shape having a smaller diameter. The cross-sectional area ratio of the hydrophilic prefilter 5 to the hydrophobic prefilter 6 is preferably 8: 1 to 99: 1, preferably 9: 1 to 19: 1.

As a material used for the hydrophilic prefilter 5, there is a hydrophilic polysulfone or the like currently used for the hollow fiber membrane 11 of the membrane module 10. The pore size of the hydrophilic prefilter 4 is preferably about 0.04 to 1 μm in order to prevent the passage of air, and preferably 0.2 to 1 μm so as not to cause clogging as much as possible.

On the other hand, examples of the material of the hydrophobic prefilter 6 include polyvinylidene fluoride, PTFE and polysulfone. The pore size of the hydrophobic prefilter 6 is 0.01 to 1 μm, preferably 0.01 to 0. 1 μm is desirable.

The case 8 of the water purifier body 2 is provided with a check valve 15 as an exhaust valve that exhausts the gas that has passed through the hydrophobic prefilter 6 to the outside. This check valve 15 includes an exhaust hole 16 that connects the downstream end surface of the hydrophobic prefilter 6 and the end surface of the case 8, a valve seat 17 provided in the exhaust hole 16, and a sphere 18 as a valve body. , Made of.

The exhaust hole 16 is U-shaped as shown in FIG. 1, and is opened at the end surface of the case 8. A valve seat 17 and a sphere 18 are arranged near the open end of the case 8 of the exhaust hole 16. The valve seat 17 is provided in the exhaust hole 16 so as to protrude inward in the radial direction, and has a ring shape, and the hole serves as a passage 19 for exhausting gas to the outside. A spherical body 18 is reciprocally inserted into the exhaust hole 16 on the outside of the valve seat 17, and opens and closes the passage 19 by contacting and separating from the valve seat 17. Further, a ring-shaped member 20 having the same shape as the valve seat 17 is provided on the outer side of the spherical body 18 in the exhaust hole 16 at a predetermined axial distance from the valve seat 17. The ring-shaped member 20 regulates the movement of the spherical body 18 in the axial direction.

The check valve 15 prevents the back flow of air. Note that the check valve 15 is not limited to the above-mentioned configuration, and may be any configuration that can prevent backflow of air.

In the water purifier having the above structure, when raw water flows into the inflow section 3, the air passes through the hydrophobic prefilter 6 by the prefilter 7. At this time, the sphere 18 of the check valve 15 is separated from the valve seat 17 by the air, and the air is exhausted to the outside through the passage 19 and the hole of the ring-shaped member 20. Then, only the liquid that has passed through the hydrophilic prefilter 5 flows into the activated carbon module 9 of the water purifier body 2, and the inflowing liquid is purified by the activated carbon module 9 and the membrane module 10 and flows out through the outflow part 4. It

As described above, since the air is not exhausted to the outside and mixed into the water purifier body 2, it is possible to prevent the aerobic bacteria from growing in the activated carbon module 9, and to prevent the flow rate due to the clogging of the bacteria. You can prevent the decline. At the same time, it is possible to prevent a decrease in the flow rate due to a decrease in the effective film area of the membrane module 10 due to the inclusion of air.

Although the water purifier main body is composed of the activated carbon module 9 and the membrane module 10 in the above embodiment, the water purifier main body is not limited to this, and may be variously modified within a range not departing from the gist of the present invention. It is possible to carry out in the form of. The material and size of each component described above are determined by various specifications and the like, and are not limited to the material and size of the above embodiment.

[0023]

[Effect of device]

 The present invention has the above-described structure and operation, and since the filtering means having both the hydrophilic portion and the hydrophobic portion is provided at the inflow portion of the water purifier body, air passes through the hydrophobic portion. , Is exhausted from the exhaust valve provided in the body of the water purifier. Therefore, it is possible to prevent air from flowing into the water purifier body.

With this, it is possible to prevent the growth of bacteria in the main body of the water purifier, and to prevent the decrease in flow rate due to the clogging of bacteria and further the decrease in flow rate due to the inclusion of air.

[Submission date] January 18, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0015

[Correction method] Change

[Correction content]

[0015] The material used for the hydrophilic prefilter 5, which can be used in actual Soraitomaku 11 in the membrane module 10, for example, hydrophilic polysulfone, and cellulose acetate over scan and the like. The pore size of the hydrophilic prefilter 4 is preferably about 0.04 to 1 μm in order to prevent the passage of air, and preferably 0.2 to 1 μm so as not to cause clogging as much as possible.

[Brief description of drawings]

FIG. 1 is a schematic view of a water purifier according to an embodiment of the present invention.

FIG. 2 is a plan view of the prefilter of FIG. 1 viewed from above.

FIG. 3 is an enlarged view of a main part of the check valve of FIG.

[Explanation of symbols]

 1 Water purifier 2 Water purifier main body 3 Inflow part 4 Outflow part 5 Hydrophilic pre-filter (hydrophilic part) 6 Hydrophobic pre-filter (hydrophobic part) 7 Pre-filter (filtering means) 8 Case 9 Activated carbon module 10 Membrane module 11 Hollow Thread film 12 Potting agent 13 Potting part 14 O-ring 15 Check valve (exhaust valve) 16 Exhaust hole 17 Valve seat 18 Sphere 19 Passage 20 Ring-shaped member

Claims (1)

[Scope of utility model registration request] 1. A water purifier body for purifying raw water, wherein the water purifier body has an inflow portion for flowing raw water into the water purifier body.
A water purifier having an outflow portion for outflowing purified water, wherein the inflow portion is provided with a filtering means having both a hydrophilic portion and a hydrophobic portion, and gas passing through the hydrophobic portion of the filtering means is passed through the water purifier. A water purifier characterized in that liquid is discharged from an exhaust valve provided in the main body, and on the other hand, the liquid that has passed through the hydrophilic part flows into the main body of the water purifier.