JPH072009Y2 - Filter - Google Patents

Description

TECHNICAL FIELD The present invention relates to a filter for filtering drinking water and the like.

2. Description of the Related Art Conventionally, there is a so-called filter cloth filter using a filter cloth for filtering drinking water. The filter cloth filter is a cloth called a filter cloth in the shape of a bag, and collects water that has permeated from the outside into the filter cloth bag by a pipe and causes it to flow out.

FIG. 5 is a vertical sectional view of a filter using such a filter cloth filter. In FIG. 5, reference numeral 20 is a filter body (hereinafter referred to as a body). 21 is a water supply pipe provided at the bottom,
Reference numeral 23 is a lid that is attached to the upper portion and is provided with the discharge pipe 22. Further, 11 is a filter cloth filter case, 12 is a filter cloth, and 13 is a filtered water collecting tube. The filter cloth 12 has a bag shape and is
As shown in the figure, it is woven into a corrugated shape. Hereinafter, the bag constituted by the filter cloth 12 will be referred to as a filter cloth bag 14. The filtered water collecting pipe 13 is attached so as to penetrate the filter cloth bag 14, and the outer end portion thereof is fitted into the opening of the end portion of the case 11 while maintaining watertightness. A slit is formed on the side of the portion of the filtered water collecting tube 13 that is inserted into the filter cloth bag 14.

At the time of water flow, the water that has passed through the filter cloth collects in the filtered water collecting pipe 13 from the slits and flows out through the filtered water collecting pipe 13 to the outside.

Generally, such a filter cloth filter is used in a state where powdered activated carbon is pre-coated on the outer surface of the filter cloth, that is, a state where a powdered activated carbon layer is formed on the surface of the filter cloth when the filtering action of the filter cloth alone is insufficient. It That is, the raw water supplied from the water supply pipe 21 flows into the case 11, and dust contained in the raw water is removed and the hydrogen sulfide odor is adsorbed by the filter cloth and the powdered activated carbon layer on the surface thereof. In FIG.
Reference numeral 24 represents powdered activated carbon enclosed in the case 11. The powdered activated carbon 24 has been completely dried in the unused state, and is in a state of being accumulated at the bottom of the case 11 as shown in FIG. Then, when the water is passed for the first time, the powdered activated carbon 24 is diffused by the flowing water and adheres to the filter cloth 12 so as to cover its surface.

By the way, 15 is a rib for separating the filter cloth 12 from the inner wall of the case 11, and as shown in FIG.
11 are set up at equal intervals along the longitudinal direction. If the filter cloth 12 is in wide contact with the inner wall of the case 11, that part cannot be used for filtration, and the filtration efficiency is reduced. Therefore, conventionally, a plurality of ribs 15 are provided upright on the inner wall of the case 11, and the ribs 15 support the filter cloth 12 so that the filter cloth 12 does not come into contact with the inner wall of the case 11 over a large area.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention With the above-mentioned structure, the activated carbon powder 24 is kept in one place until water is passed for the first time. Then, for example, when the powdered activated carbon 24 is left in a horizontal state for a long time and transported, the powdered activated carbon 24 is biased to one place on the side of the case. Moreover, if it gets a little damp, it may set in such a biased state. In such a case, the activated carbon powder 24 will diffuse from a biased position when passing water, and will not be uniformly attached to the entire filter cloth, but will be biasedly attached to only one side. In this case, if the ribs 15 are continuously provided from one end to the other end of the case 11 as in the conventional case, water that rotates in the case 11 in the lateral direction, that is, the direction of arrow A shown in FIG. Almost never occurs,
It was not expected that the powdered activated carbon 24 would naturally disperse and become uniform.

The present invention has been made in view of the above problems, and an object thereof is to provide a filter capable of uniformly spreading and adhering powdered activated carbon to the entire filter cloth.

Means for Solving the Problems In order to solve the above problems, the present invention divides the ribs of the inner wall of the cartridge case into upper and lower parts, and the ribs in the upper rib group are located between the ribs in the lower rib group. I decided to do it.

Operation With the above configuration, the ribs in the upper rib group branch the water channel that flows in the longitudinal direction in the case, and the flow of water that horizontally turns in the case occurs.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. Since the filter body and the filter cloth filter are constructed in the same manner as the conventional example shown in FIG. 5, their detailed description will be omitted.

In FIG. 1, 1 is a filter case for accommodating a filter cloth filter, and 2 and 3 are a plurality of ribs provided upright on the inner wall of the case 1 at substantially equal intervals to separate the filter cloth 12 from the inner wall of the case 1. Is a group of ribs. Of the plurality of ribs, the rib of the rib group 2, that is, the rib 2a extends downward from the upper end of the case 1 and extends to a position slightly before the center. Further, the intervals between the ribs of the rib group 2 adjacent thereto are equal. However, the ribs of the rib group 3, that is, the ribs 3a, extend upward from the lower end of the case 1, and likewise extend to a position slightly in front of the central portion. The ribs 3a are located between the ribs 2a.

The filtration of this filter is performed by passing water as in the conventional example. During the first passage of water, the activated carbon powder diffuses into the water and adheres to the surface of the filter cloth. The flow of water during use will be described in detail below.

FIG. 2 shows a state in which the case 1 is cut and opened. The arrows in FIG. 2 indicate the flow of water.
That is, since the length of the ribs 2a and the ribs 3a is less than half of the total length of the case 1, water can flow laterally in the central portion of the case 1. Moreover, since the ribs 2a and the ribs 3a are alternately arranged, the water flow is divided into right and left by the ribs 2a. In this embodiment, since the water flows in a complicated manner in this way, even if the powdered activated carbon is unevenly attached to the filter cloth when the water is first passed, it will eventually be dispersed.

Next, a second embodiment will be described. In FIG. 3, reference numeral 6 denotes a rib group provided on the upper part of the case 4, and each rib extends downward from the upper end of the case 4. FIG. 4 shows a case in which the case 4 is cut and opened, which will be described below with reference to FIG. The rib group 6 includes two types of ribs having different lengths. One rib 6a extends to a position slightly beyond the central portion, and the other rib 6b extends to a position slightly in front of the central portion. Further, the ribs 6a and the ribs 6b are alternately arranged, and their intervals are all equal.

Further, 7 is a rib group provided in the lower part of the case 4, each rib of the rib group 7 is much shorter than the ribs of the rib group 6 and has the same length, and between the ribs 6a and 6b. They are arranged at the same intervals.

In this embodiment, the ribs 6a and the ribs 6b are greatly different in length and are alternately arranged, and the water flows along a more complicated path than in the case of the previous embodiment, and powder Activated carbon will be better dispersed.

As described above, according to the present invention, a plurality of parallel ribs are formed on the inner wall of the cartridge case at a predetermined interval, and each rib of one rib group is formed. By locating it between the ribs of the other rib group, this rib branches the water channel that flows in the longitudinal direction in the case, and a water flow that flows in the lateral direction occurs in the case. Even if the powdered activated carbon is unevenly attached to the filter cloth when passing water, the powdered activated carbon can be naturally dispersed by the water flow.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a filtration cartridge of a filter according to a first embodiment of the present invention, and FIG. 2 is an explanatory view showing a flow of water in a state where the case of the first embodiment is expanded, FIG. 4 is a vertical sectional view of a filter cartridge of a filter according to a second embodiment of the present invention, FIG. 4 is an explanatory view showing a flow of water in a state where the case of the second embodiment is expanded, and FIG. FIG. 6 is a cross-sectional view of a conventional filter, and FIG. 6 is a cross-sectional view of the same filter taken along the line AA shown in FIG. 1 …… Case, 2,3 …… Rib group 2a, 3a …… Rib

Claims (1)

[Scope of utility model registration request] 1. A filter cloth filter in which a filter cloth is formed in a bag shape and a tube for forming a water outlet is provided, and a cylindrical case having a water inlet at one end and a water outlet at the other end. A plurality of rib groups, each having a plurality of parallel ribs, are formed on the inner wall of the case along the longitudinal direction of the ribs with a predetermined interval therebetween, and each rib of one rib group has the other rib. A filter characterized by being arranged so as to be located between each rib of a rib group, containing the filter cloth filter in the case, and fitting the pipe to the water inlet port without a gap.