JPH10165947A - Water purifier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the pressure resistance of a filter cartridge fitted replaceably to a household water purifier and to easily hold the quality thereof. SOLUTION: In a water purifier of which the filter cartridge is made replaceable by arranging the filter cartridge 20 on a base part provided with a raw water port 8 and a purified water port 9 and fitting the cover member 25 covering the filter cartridge to the base part in a freely detachable manner, an inwardly turned flange part 26 is formed to the upper end surface of the cover member 25 and a press part 27 pressing the upper surface of the filter cartridge to the rear surface of the inwardly turned flange part is integrally formed and a lid 30 is fitted to the opening 28 of the inwardly turned flange part in a freely detachable manner.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a household water purifier installed for purifying and using tap water.

[0002]

2. Description of the Related Art Household water purifiers used to remove impurities in tap water or to improve the quality of water are:
As is well known, it is necessary to periodically replace a filter cartridge containing a filter medium such as activated carbon or a hollow fiber membrane. Therefore, the filter cartridge is conventionally configured to be easily replaced simply by removing a cover body. Also, Japanese Patent Application Laid-Open No. 7-10826
In the water purifier disclosed in Japanese Patent Publication No. 0, the upper part of the cartridge is formed of a transparent member, and the degree of contamination of the filter medium can be checked by removing the lid detachably mounted on the upper part of the cover body and seeing through the inside of the cartridge. It is possible to confirm the appropriate replacement time.

[0003]

By the way, the transparent member at the top of the cartridge is formed in a spherical shape so as to withstand the water pressure applied from the inside, and the transparent member is configured to be pressed by the cover body. However, since only the outer peripheral edge of the transparent member is pressed by the cover body, there is a possibility that the transparent member expands upward and breaks when the water pressure increases.

Some of the above-mentioned cover bodies are coated with resin for the purpose of diversification of design, and some are not. However, in such a case, the fitting of the lid is extremely difficult depending on the thickness of plating formed on the surface. There was a problem that the quality became tight or loose and variation in quality became remarkable.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has a filter cartridge disposed on a base portion provided with a raw water port and a water purification port, and covers the filter cartridge. In a water purifier in which the filter cartridge is replaceable by providing a cover body detachably on the base portion, an inward flange portion is formed on an upper end surface of the cover body, and a filter cartridge is provided on a lower surface of the inward flange portion. A pressing portion for lowering the upper surface is integrally formed, and a lid is detachably fitted into an opening of the inward flange portion. The present invention also provides the water purifier, wherein the inner peripheral surface of the opening hole is formed on a tapered surface or a stepped surface whose diameter increases downward, and
An elastic ring is interposed on the outer periphery of the fitting portion of the lid.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view of the water purifier, and FIG. 2 is a longitudinal sectional view thereof. In the figure, reference numeral 1 denotes a base portion provided with a water supply pipe 2 connected to a water pipe at the bottom in a hanging manner, 3 denotes a water discharge handle protruding from an outer periphery of the base portion 1, and 4 denotes an outer periphery of the base portion 1. A stay water pipe 5 is supported by the stay pipe 4 with a stay pipe projecting in a direction perpendicular to the water discharge handle 3. Reference numeral 6 denotes a deck surface of the sink.
The base part 1 is attached by inserting the water supply pipe 2 into the water pipe and tightening the nut 7 from below.

On the upper surface of the base portion 1, a raw water port 8 and a clean water port 9 are provided.
Are arranged side by side adjacently. Further, the inside of the base portion 1 is partitioned by a partition into a chamber 10 communicating with the water supply pipe 2, a chamber 11 communicating with the raw water outlet 8, and a chamber 12 communicating with the stay pipe 4 and the water purification port 9. Have been. Further, a valve port 13 for communicating the chamber 10 with the chamber 11 is opened, and a valve element 14 which moves forward and backward by rotating the water discharge handle 3 is provided opposite the valve port 13. Reference numeral 15 denotes a cylindrical portion raised near the outer peripheral edge of the upper surface of the base portion 1.
A screw groove is formed on the outer periphery of 5.

Reference numeral 20 denotes a filter cartridge in which a filter medium 21 is accommodated. On the lower surface of the filter cartridge 20, a cylindrical raw water mounting port 22 fitted to the raw water port 8 and a cylindrical shape fitted to the water purification port 9 are provided. Each of the water purification outlets 23 is projected. 24 is the filter cartridge 2
0 is a transparent member that is attached to the upper end surface of the cartridge and seals the inside of the cartridge with water.

Reference numeral 25 denotes a cover for covering the filter cartridge 20. A screw groove which can be screwed into the cylindrical portion 15 is formed on the inner periphery of the lower opening edge of the cover 25. In addition, an inward flange portion 26 is formed on the upper end surface of the cover body 25, and the lower surface of the flange portion 26 is shown in FIGS.
As shown in FIG. 2, the annular pressing portion 27 is formed integrally,
As the cover body 25 is screwed into the cylindrical portion 15, the pressing portion 27 can lower the upper surface of the transparent member 24 of the filter cartridge 20.

The opening hole 28 of the inward flange portion 26 is formed as a tapered surface whose inner peripheral surface gradually increases in diameter downward. Reference numeral 30 denotes a lid including a fitting portion 31 and an eave portion 32. An elastic ring 33 (in this case, an O-ring) made of an elastic body such as rubber is attached to the outer periphery of the fitting portion 31. Reference numeral 29 denotes a concave portion formed on the upper edge portion of the outer peripheral surface of the cover body 25. When the cover 30 is to be opened, the claw is easily hooked on the outer peripheral edge of the eave portion 32 due to the concave portion. I do.

In this water purifier, when the water discharge handle 3 is operated to retract the valve body 14 and open the valve port 13, the raw water in the chamber 10 passes through the chamber 11, the raw water port 8, the raw water mounting port 22, and the filter cartridge. 20, circulates in the filter cartridge 20 as indicated by the arrow, and purified water that has been purified by passing through the filter medium 21 passes through the purified water outlet 23, the purified water port 9, the chamber 12, and the stay pipe 4. The water is discharged from the water discharge pipe 5. Then, the filter cartridge 20 can be easily replaced by rotating the cover body 25 and removing the screw engagement with the cylindrical portion 15 of the base portion 1. And
At an appropriate time for the exchange, the filter cartridge 20 can be viewed through the opening hole 28 only by opening the lid 30, so that it is not necessary to remove the cover body 25 each time.

Since the inner peripheral surface of the opening 28 is formed as a tapered surface and the elastic ring 33 is attached to the fitting portion 31 as described above, the opening 30 is required to close the lid 30. Even if there is some accuracy error in the inner diameter of
When the elastic ring 33 is once compressed and restored along the tapered surface, the fitting portion 31 is fitted in a state of being pulled downward, and the eave portion 32 is fitted to the upper surface of the inward flange portion 26. It can be fitted without any backlash when in close contact.

FIG. 5 shows an embodiment in which the inner peripheral surface of the opening hole 28 is formed on a stepped surface whose diameter increases downward.
As described above, even if the inner peripheral surface of the opening hole 28 is a stepped surface, the elasticity of the elastic ring 33 does not rattle without strictly asking the accuracy of the inner diameter, and the fitting state is always properly fitted without being too tight. Can be combined.

Further, the embodiment shown in FIG.
8 has relief recesses 34 formed at regular intervals on the inner peripheral surface. However, in this case, when the fitting portion 31 is pushed in, the deformed portion of the elastic ring 33 is deformed by the pressure.
By setting it in 4, the unnecessary deformation of the elastic ring 33 can be prevented and the fitting can be further facilitated. In this case,
It is preferable that the corners of the concave portion 34 be rounded so as not to damage the elastic ring 33.

For this reason, even if the cover body 25 is, for example, resin-plated or not, an error may occur in the inner diameter of the opening hole 28 due to the presence or absence of the plating thickness. It is possible to absorb and always obtain an appropriate fitting state, and to stabilize the quality.

Further, by forming the inward flange portion 26 and forming the pressing portion 27 on the inward flange portion 26,
The transparent member 24 on the upper surface of the filter cartridge 20 can be pressed down as close to the center as possible, so that the transparent member 24 can be prevented from rising upward due to the water pressure in the filter cartridge 20 and its destruction can be prevented. Thus, the pressure resistance can be greatly improved even when the water pressure is abnormally increased.

[0017]

As described above, according to the present invention, the pressure resistance of the filter cartridge is improved, and even if the dimensional error of the opening is relatively large, the lid can always be kept in an appropriate fitting state to improve the quality. It has beneficial effects such as being able to retain.

[Brief description of the drawings]

FIG. 1 is a side view of a water purifier according to the present invention.

FIG. 2 is a longitudinal sectional view of the water purifier of FIG.

FIG. 3 is an enlarged view of a main part of FIG. 2;

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is an enlarged view of a main part of a water purifier showing another embodiment of the present invention.

FIG. 6 is a cross-sectional view of a main part of a water purifier showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base part 2 Water supply pipe 3 Water discharge handle 5 Purified water discharge pipe 8 Raw water outlet 9 Water purification port 15 Cylindrical part 20 Filter cartridge 21 Filter medium 24 Transparent member 25 Cover body 26 Inward flange part 27 Pressing part 28 Opening hole 30 Cover 31 Fitting part 32 Eave part 33 Elastic ring 34 Depression

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tomohisa Mizutani 308 Kurono, Gifu City, Gifu Prefecture Inside K-B-K Inc. (72) Inventor Yasuko Konishi 2-2-1-11 Tamazuki Motomachi, Higashi Osaka City, Osaka Prefecture

Claims (2)

[Claims] 1. A filter cartridge is disposed on a base portion provided with a raw water port and a water purification port, and a cover body covering the filter cartridge is detachably provided on the base portion to replace the filter cartridge. In the water purifier, an inward flange portion is formed on an upper end surface of the cover body, a pressing portion for pressing down an upper surface of the filter cartridge is integrally formed on a lower surface of the inward flange portion, and an opening hole of the inward flange portion is formed. A water purifier characterized in that a lid is detachably fitted to the water purifier. 2. The method according to claim 1, wherein an inner peripheral surface of the opening is formed as a tapered surface or a stepped surface whose diameter increases downward, and an elastic ring is interposed on the outer periphery of the fitting portion of the lid. Item 1
The water purifier described in 1.