JP2591130Y2 - Water purifier - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water purifier for filtering tap water, and more particularly to a cartridge type filter unit for a household water purifier.

[0002]

2. Description of the Related Art Conventionally, water purifiers which are directly attached to a faucet of a faucet and which can easily filter tap water have been used in ordinary households. In the case of this type of water purifier, the water purifier includes a water purifier main body and a filter unit that can be attached to and detached from the water purifier main body. After the raw water is supplied to the inlet of the filter unit via the water purifier main body and filtered by the filter unit, Then, the filtered water is discharged from the discharge port of the filtration unit through the water purifier main body. By the way, the conventional filtration unit
A filter medium such as activated carbon or a hollow fiber membrane is accommodated in the outer case, a lid member is fixed to the opening of the outer case, a discharge port is provided in the center of the lid member, and a plurality of discharge ports are provided on the outer peripheral portion of the discharge port. Is provided. Therefore, the raw water that has entered through the inflow port flows in from the outer peripheral portion of the filtration unit, and the purified water that has been filtered is discharged from the central discharge port.

[0003]

In the case where the filtering section has the above-mentioned structure, removing the lid member causes the filter medium inside the outer case to be separated, so that the lid member cannot be separated from the outer case. . Therefore, when the filter medium is deteriorated, not only the filter medium but also the outer case and the cover member must be replaced integrally, and the replacement parts become expensive,
There was a disadvantage of wasting resources. SUMMARY OF THE INVENTION An object of the present invention is to provide a water purifier in which only the minimum necessary parts can be replaced, the replacement parts are inexpensive, and the waste of resources is reduced.

[0004]

In order to achieve the above object, the present invention comprises a water purifier main body and a filter section detachable from the water purifier main body, and filters raw water through the water purifier main body. In the water purifier, the filtered water is discharged from the outlet of the filtration unit through the water purifier main body after being filtered and supplied by the filtration unit, and the filtration unit is provided with a bottomed cylindrical outer case and A filter unit removably housed in the outer case, and a case cover removably attached to an opening of the outer case to prevent the filter unit from falling off, wherein the filter unit includes a cylindrical holder and , A first filter medium mounted on the outside of the holder, and a second filter medium accommodated inside the holder, an inflow port for guiding raw water to the first filter medium is provided in the case cover, and the second filter medium is passed through. The outlet for discharging filtered water is filled And it is provided at one end of the unit.

[0005]

When the filter unit has deteriorated, the filtering unit is first removed from the water purifier body. Next, the case cover attached to the opening of the outer case is removed, and the filter unit is taken out of the outer case. Then, the new filter unit is stored in the outer case, and the case cover is attached to the opening of the outer case to prevent the filter unit from falling off. Thereafter, the filter unit is attached to the water purifier body, thereby completing the replacement operation of the filter unit.

In the present invention, the discharge port may be provided integrally with the filter unit, or a component having the discharge port may be detachable from the filter unit. In the latter case, only the replacement unit is required for the filter unit. In the above-mentioned filter unit, the holder has a function of partitioning between the inner second filter medium and the outer first filter medium, and holding both of them stably.

[0007]

1 to 4 show an example of a water purifier according to the present invention. This water purifier generally includes a water purifier main body 1 and a filter unit 2 that can be attached to and detached from the water purifier main body 1.
A connection port 3 connected to a faucet of a water faucet is provided at an upper portion of the water purifier main body 1, and an annular packing 4 that is in close contact with the faucet is disposed at the connection port 3. A valve chamber 5 is integrally formed below the connection port 3. One end (left side in FIG. 3) of the valve chamber 5 is closed, and the other end is open. Valve room 5
As shown in FIG. 3, an inflow port 6 communicating with the connection port 3 is formed in the upper part, and a first outlet 7 for discharging raw water as it is downward is formed in the lowermost part. In addition, valve room 5
A second outlet 8 that opens horizontally in one side with the first outlet 7 interposed therebetween, and a third outlet (not shown) that opens diagonally downward on the other side. . The inflow port 6 and the first to third outlets 7, 8 are provided on the same circumference. The second outlet 8 is a connecting pipe 9, 10 (see FIG. 2).
And the third outlet is provided with the first
It communicates with a shower hole 12 through a shower room 11 formed around the outlet 7.

A valve 13 is rotatably inserted into the valve chamber 5. The valve 13 has a wide opening 14 and an opening 1.
An outlet hole 15 is formed at a position obliquely downward with respect to 4, and
The opening 14 and the outlet hole 15 communicate with each other. The opening 14 is formed so as to face the inflow port 6 at all switching positions of the valve body 13, and also faces the second outlet 8 when using filtered water. The outlet hole 15 is formed in a size corresponding to the first outlet 7 or the third outlet. A switching lever 17 is fitted to a shaft portion 16 of the valve body 13 protruding laterally from the valve chamber 5, and an open portion of the valve chamber 5 has double O-rings 18, 1.
Sealed by 9 prevents water that has entered the interior of the valve chamber 5 from leaking out.

As shown in FIG. 5, the filtering section 2 includes a cylindrical outer case 20 having a bottom and a filter unit 21 housed in the outer case 20. The filter unit 21 has a substantially cylindrical resin holder 22, and a plurality of hollow fiber membranes 2 serving as a second filter medium inside the holder 22.
3 is housed in a state of being bent into a U-shape. The open end of the hollow fiber membrane 23 is fixed to the opening of the holder 22 by a sealing material (not shown), and only water that has permeated into the inside from the outer peripheral part of the hollow fiber membrane 23 passes through the hollow fiber membrane 23. So that it flows out from the open end. Flanges 24 and 25 are integrally formed at both ends of the holder 22, and the outer peripheral portions of the flanges 24 and 25 are in contact with the inner surface of the outer case 20. A fibrous activated carbon 26 serving as a first filter medium is wound in a layer around the outer periphery of the holder 22 and an intermediate portion between the flanges 24 and 25, and the inner and outer peripheries of the activated carbon 26 are covered with a nonwoven fabric 27. The nonwoven fabric 27 prevents the activated carbon 26 from falling off the holder 22. An inflow hole 24a and a through hole 25a are formed in the flanges 24 and 25, respectively. Raw water entering from the inflow hole 24a flows in the activated carbon 26 in the axial direction, and passes through the through hole 25a to form the outer case 20. It enters the gap between the bottom and the holder 22. Further, water enters the inside of the holder 22 in which the hollow fiber membrane 23 is accommodated through an opening hole 28 provided at one end of the holder 22, and is filtered by the hollow fiber membrane 23. A discharge port cover 31 is fitted to the other open end of the holder 22 via an O-ring 32, and a cylindrical discharge port 33 protrudes from the center of the discharge port cover 31. The water filtered by the hollow fiber membrane 23 is discharged from the discharge port 33.

On the inner surface of the opening of the outer case 20, a case cover 34 for retaining the filter unit 21 is screwed via an O-ring 35. Case cover 3
A through hole 36 for loosely inserting the discharge port 33 is formed at the center of the through hole 4.
7 are formed. In addition, a strainer 38 for removing large suspended matters contained in the raw water entered from the inflow port 37 is disposed between the case cover 34 and the discharge port cover 31. On the outer periphery of the end of the case cover 34, a male screw 34a screwed with the water purifier main body 1 is formed.

As shown in FIG. 2, a connecting member 40 for detachably mounting the filtration unit 2 is fixed to the water purifier main body 1. The connection member 40 includes a communication port 41 to which one end of the connection pipe 10 is connected, and the case cover 34.
A female screw 43 into which the male screw 34a is screwed via an O-ring 42, and a receiving port 45 into which the discharge port 33 is fitted via an O-ring 44 are provided. The connecting member 40
Has a transparent discharge pipe 4 so as to communicate with the receptacle 45.
6 is connected, and inside the discharge pipe 46, a water amount indicator 47 is accommodated. The water amount indicator 47 is urged toward the receptacle 45 by a spring 48, and is integrally formed with the discharge pipe 46 through a window 49 (see FIG. 4).
By visually checking the position of the indicator 47 from, the discharge water amount can be confirmed.

In the water purifier having the above structure, the raw water sent from the valve chamber 5 through the connection pipes 9 and 10 is connected to the communication port 4.
1. Chlorine and musty odor are removed by flowing in the activated carbon 26 in the axial direction through the inflow port 37, the strainer 38, and the inflow hole 24a. Further, the passage holes 25a,
Holder 22 in which hollow fiber membrane 23 is accommodated through opening hole 28
After the turbidity, red rust and the like are removed by the hollow fiber membrane 23, filtered water is discharged from the discharge port 33.

Here, a method of replacing the filter unit 21 will be described. First, the outer case 20 (case cover 34) is turned and removed from the female screw 43 of the water purifier main body 1 (connecting member 40). At this time, since the case cover 34 is screwed into the opening of the outer case 20, the filter unit 21 and the case cover 34 come off the water purifier body 1 integrally with the outer case 20. Next, the outer case 20
The filter unit 21 is removed from the outer case 20. Then, the discharge port cover 31 is removed from the filter unit 21. Next, the discharge port cover 31 is fitted to the new filter unit 21, and the filter unit 21 is stored in the outer case 20.
Then, the case cover 34 is screwed into the opening of the outer case 20 to prevent the filter unit 21 from coming off. Finally, the replacement operation is completed by screwing the outer case 20 to the water purifier main body 1. As described above, only the holder 22, the hollow fiber membrane 23, the activated carbon 26, and the nonwoven fabric 27 constituting the filter unit 21 are replaced, and the components such as the outer case 20, the case cover 34, and the discharge port cover 31 can be shared. So it is very economical.

FIG. 6 shows another embodiment of the filtering section of the present invention. In this embodiment, the holder 2 of the filter unit 21
2 has a cylindrical shape with a closed end, and a large number of communication ports 50 are provided on the outer periphery to communicate the inside and the outside. Then, the hollow fiber membrane 23 is accommodated in the holder 22 in a state of being bent in a U-shape, and a fibrous activated carbon 26 is wound around the outer periphery of the holder 22. A convex portion 51 is provided at the closed end of the holder 22, and the convex portion 51 is fitted to a concave portion 52 provided at the bottom of the outer case 20 and positioned at the center position. The outer diameter of the filter unit 21 is smaller than the inner diameter of the outer case 20, so that an annular space 53 is formed between the filter unit 21 and the outer case 20.

In the case of the filtering section having the above structure, the raw water entering from the inlet 37 passes through the strainer 38 and enters the annular space 53. Therefore, the raw water comes into contact with the activated carbon 26 provided on the outer periphery of the filter unit 21 all around, and passes through the layer of the activated carbon 26 in the center direction, thereby removing chlorine, mold odor, etc. Enters the internal space through the communication port 50 of the hollow fiber membrane 23 disposed in the internal space.
After the turbidity, red rust and the like are removed by this, filtered water is discharged from the discharge port 33. As described above, since the raw water flowing from the inlet 37 enters the annular space 53, even if there is an imbalance in water pressure, the raw water does not flow unevenly near the inlet as in the conventional case, and the activated carbon does not flow. 26 and the hollow fiber membrane 23 in a large area. Therefore, all activated carbon 2
6 and the hollow fiber membrane 23 enable efficient filtration.

The present invention is not limited to the embodiment described above, and various modifications can be made without departing from the gist of the present invention. As the first filter medium and the second filter medium, any filter medium can be used depending on the use. Further, the first filter medium is not limited to a layer wound around the outer periphery of the holder, but may be a cylindrical molded article or the like. In this case, the flange 25 may be omitted. In the above embodiment, the filter unit 2
Discharge port cover 31 having discharge port 33 in one holder 22
Is detachable, but the discharge port 33 may be formed integrally with the holder 22. However, in the case of the embodiment, since the discharge port cover 31 can be shared, the number of replacement parts can be minimized, which is economical.

[0017]

As apparent from the above description, according to the present invention, when the filter unit is deteriorated, only the filter unit needs to be replaced, and parts such as the outer case and the case cover can be shared. This has the effect of reducing the cost of replacement parts and reducing wasteful use of resources.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional front view of an example of a water purifier according to the present invention.

FIG. 2 is a partial sectional view taken along line AA of FIG.

FIG. 3 is a partial sectional view taken along line BB of FIG. 1;

FIG. 4 is a partial sectional view taken along line CC of FIG. 2;

FIG. 5 is a cross-sectional view of a filtration unit.

FIG. 6 is a sectional view of another embodiment of the filtration unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water purifier main body 2 Filtration part 20 Outer case 21 Filter unit 22 Holder 23 Hollow fiber membrane 26 Fibrous activated carbon 31 Discharge port cover 33 Discharge port 34 Case cover 37 Inflow port 46 Discharge pipe

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-79271 (JP, A) JP-A-4-83578 (JP, A) JP-A-60-222188 (JP, A) 163490 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) C02F 1/28 B01D 35/04

Claims (1)

(57) [Scope of request for utility model registration] 1. A water purifier main body, and a filtration unit detachable from the water purifier main body, wherein raw water is supplied to the filtration unit via the water purifier main body, and after filtered by the filtration unit, the filtered water is purified. In the water purifier configured to discharge through the container body, the filtering unit includes a bottomed cylindrical outer case, a filter unit detachably housed in the outer case, and an outer case to prevent the filter unit from falling out. And a case cover detachably attached to the opening of the filter unit, wherein the filter unit comprises: a tubular holder; a first filter medium attached outside the holder; and a second filter medium accommodated inside the holder. Wherein an inlet for introducing raw water to the first filter medium is provided in the case cover, and a discharge port for discharging filtered water passing through the second filter medium is provided at one end of the filter unit. vessel.