JP2762539B2 - Filter - Google Patents

Description

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

2. Description of the Related Art A cartridge type filter provided with a cartridge for filtration in which activated carbon is enclosed as a filter material in a main body is used in general households and the like. In such general household use, it may be very convenient if the filter medium housing section is configured to allow water to pass in the horizontal direction. For example, when a filter is installed in the middle of a rotary discharge pipe of a faucet as shown in FIG. 7, or when the filter is configured to fit under a rotary discharge pipe as shown in FIG. It is.

In most conventional filters, the filter medium storage portion for storing the activated carbon filter medium is substantially cylindrical. For example, when the activated carbon filter medium and the hollow fiber filter are used in combination, for example, as shown in FIG. When the activated carbon filter medium storage portion is configured to surround the filter portion, it may be advantageous in terms of effective use of space. Hereinafter, the configuration of the conventional filter shown in FIG. 3 will be described in detail.

In FIG. 3, the filter main body 21 includes a water channel switching device 23 and a cartridge accommodating portion 24. Reference numeral 22 denotes a faucet tip, and the filter main body 21 is provided with a water outlet 50 and a water receiving port 51 of the faucet tip 22 by mounting means provided on the upper part of the water channel switching part 23.
It is attached by joining. The water outlet 50 is provided vertically downward at the faucet tip 22, and the water inlet 51 is provided on the upper part of the filter main body 21 so as to be coupled to the water outlet 50. This conventional filter is provided with a water channel switching unit 23.
A water passage switching valve (not shown) provided therein can switch between a water passage for discharging raw water as it is and a water passage for discharging raw water through a filter medium. 25 is a filtration cartridge. The filter medium housing section 24 includes a main body section 26 and a cover member 27 that can be divided from each other, and the filtration cartridge 25 is housed in a space defined by the main body section and the cover member 27. Reference numeral 28 denotes an injection pipe protruding from the filter medium container 24 for guiding raw water into the cartridge 25 for filtration. The injection pipe 28 fits into a raw water inflow port provided in the filtration cartridge 25. Reference numeral 29 denotes a connection portion for filtered water protruding from the cartridge 25 for filtration.
And is connected to the connecting portion 30 which is connected to the filtered water discharge port.

Next, the configuration of the filtration cartridge 25 will be described in more detail. 4 (a) and 4 (b) are a front view and a side view, respectively, of the filtration cartridge 25. FIG. 5 is a perspective view of the filter cartridge 25 cut along the line AA shown in FIG. FIG. 6 is a sectional view taken along the line BB shown in FIG. In FIG. 5, 31 is a bottomed cylindrical case member, and 32 is a lid member for closing an end opening of the case member 31. As shown in FIG. 6, a hollow fiber filter accommodating section 33 for accommodating a hollow fiber filter having a cylindrical cross section and an activated carbon accommodating section 34 having a crescent cross section surrounding the hollow fiber filter are provided in the case member 31. Is provided. Reference numeral 35 denotes a hollow fiber filter including a cylindrical case 36 and a hollow fiber 37 having a large number of fine holes formed in a side wall.
That is, the hollow fiber filter 35 is configured by bending a plurality of hollow fibers 37 into a U-shape and bundling them, and fixing the ends 38 in the case 36 with an adhesive. Hollow fiber filter 35
Is housed in the hollow fiber filter housing 33, and the O-ring 39 is tightly attached to the inner wall of the hollow fiber filter housing 33 without any gap, thereby preventing water leakage. Reference numeral 40 denotes granular activated carbon stored in the activated carbon storage unit 34. Reference numerals 41 and 42 denote mesh filters provided at both ends of the activated carbon accommodating portion 34 for preventing the granular activated carbon 40 from flowing out. The net filter 41 is provided at a position somewhat away from the raw water side wall 43, and a space is provided between the raw water side wall 43 and the net filter 41.
44 are formed. Then, the activated carbon accommodating portion 34 and the space 44 are separated by only the net filter 41. 45 is a check valve ball for preventing the water once flowing into the activated carbon storage unit 34 from flowing back to the inflow port 48 side, 46 is a hold plate for holding the check valve ball 45,
47 is a spring for urging the check valve ball 45 toward the inflow port 48. The inlet 48, the space 44, the net filter 41, and the activated carbon accommodating section 34 are arranged in order in the horizontal direction when used. The hold plate 46 is composed of two plate-like members projecting from the raw water side wall 43 so as to face each other. In use, the check valve ball 45 is pushed by water pressure and separated from the inflow port 48, and the water that has flowed out of the inflow port 48 is directed upward and downward with respect to the inflow port 48 through the slit between the two plate-like bodies, that is, It proceeds in the direction of arrow C in FIG. The water that has flowed into the space 44 in this manner passes through the net filter 41 and passes through the activated carbon storage unit 34 filled with the granular activated carbon 40. Then, it flows out of the activated carbon storage part 34 through the mesh filter 42, and is further discharged through the hollow fiber filter 35 to the outside. Then, residual chlorine is removed by the granular activated carbon 40 when passing through the activated carbon accommodating section 34, and turbid components such as iron rust and general bacteria are removed when passing through the hollow fiber filter 35.

Problems to be Solved by the Invention However, the above configuration has the following problems. Water can flow into the activated carbon storage unit 34 from any part of the net filter 41. By the way, the granular activated carbon 40 is not always clogged in the activated carbon accommodating portion 34 without gaps. If the granular activated carbon 40 sinks due to gravity, the density of the granular activated carbon 40 becomes lower at the upper part of the activated carbon storage part 34, and in some cases, the upper part of the activated carbon storage part 34 may be vacant. Then, the water that has flowed into the space 44 mainly passes through the upper part of the activated carbon storage unit 34, and the rate of passing through the granular activated carbon 40 is reduced.
, The filtration action is impaired.

The present invention has been made in view of the above problems, in a filter that is horizontally arranged by connecting the water outlet of the faucet and the upper water receiving port, even if the water transverses the granular activated carbon in the direction of gravity, That is, it is an object of the present invention to provide a filter which can flow uniformly in the granular activated carbon without being partially biased even in a configuration in which the filter passes horizontally.

Means for solving the problem The present invention, in order to solve the above problems, a filter body provided with a water receiving port that can be coupled to the water outlet of the faucet, an activated carbon storage unit that stores granular activated carbon inside, A mesh filter which is disposed at the raw water inlet side end of the activated carbon storage unit and prevents the granular activated carbon from flowing out to the raw water side, such that the net filter is interposed between the activated carbon storage unit and the net filter. In a filter provided with a space formed on the raw water side with respect to the activated carbon accommodating portion, and an inlet for allowing raw water flowing from the water receiving port to flow into the space, a filter is provided from the inlet in the space. A guide plate that suppresses the water flow directed upward of the activated carbon storage unit and directs the flow direction to the horizontal direction also protrudes from the inner wall surface that configures the space so as to cover the upper part of the inflow port in the flowing water direction. That Features.

Operation With the above configuration, since the guide plate suppresses the water flow toward the upper part of the activated carbon storage part and turns the flow direction in the horizontal direction, the amount of water flowing into the activated carbon storage part from the upper end of the raw water side space is The amount of water that flows into the activated carbon storage unit from the central part and lower part of the raw water side space increases accordingly.

Example Hereinafter, a filter according to an example of the present invention will be described.

FIG. 1 is a perspective view showing a main part of the filter cartridge of the present filter, in which only the case member 1 of the filter cartridge is partially cut away to show the internal structure. In FIG. 1, the schematic configuration of a case member 1 is a bottomed cylindrical shape as in the conventional example of FIG. A hollow fiber filter 2 is housed in a hollow fiber filter housing portion formed in the case member 1. Further, an activated carbon container 3 having a crescent cross section is provided so as to surround the hollow fiber filter 2. Numeral 4 denotes a cylindrical wall separating the hollow fiber filter accommodating portion and the activated carbon accommodating portion 3, and 5 denotes an outer member. 6
Is a holding plate for holding the check valve ball 45.
The holding plate 6 is composed of two plate-like bodies, and protrudes from the raw water side wall 7 so as to face each other, similarly to the conventional example shown in FIG. Reference numeral 11 denotes a raw water side space formed between the raw water side wall 7 and the activated carbon storage unit 3. The above configuration and the basic configuration for attaching the water receiving port of the filter to the water outlet of the faucet are almost the same as those of the conventional example shown in FIG.

Reference numerals 8 and 9 denote guide plates provided above and below the hold plate 6 so as to be adjacent to the hold plate 6, respectively. The guide plate 8 and the guide plate 9 project from the raw water side wall 7 so as to face each other with the hold plate 6 interposed therebetween. The guide plate 8 is only required to be able to suppress the water flow toward the upper part of the activated carbon accommodating section 3 and to be directed downward in the flow direction, that is, horizontally. The guide plate 9 is similarly directed to be directed upward in the flow direction. I just need.

Reference numeral 10 denotes a mesh filter attached to the inflow-side end of the activated carbon accommodating section 3. As in the conventional example shown in FIG. 3, a mesh filter is provided between the activated carbon accommodating section 3 and the raw water side space 11. The filter 10 is interposed. The mesh filter 10 is housed in the case member 1 as shown by an arrow. The ends of the guide plates 8 and 9 reach the vicinity of the screen filter 10.

Hereinafter, the operation will be described. In use, the water flows out of the slit on the side of the holding plate 6 as shown by arrow D in FIG. Then, the water flow is bent by the guide plates 8 and 9, passes through a relatively central portion of the net filter 10, and flows into the activated carbon storage unit 3 filled with the granular activated carbon 40. The water that has flowed out of the activated carbon storage section 3 is further discharged through the hollow fiber filter stored in the hollow fiber filter storage section.

Advantageous Effects of the Invention As described above, the present invention provides a guide plate that suppresses a water flow directed upward of an activated carbon storage unit and directs the flow direction to a horizontal direction.
By projecting from the inner wall surface that composes the space so as to cover the upper part of the inlet in the flowing direction, the amount of water flowing into the activated carbon storage unit from the upper part of the raw water side space is reduced, and the raw water side The amount of water flowing into the activated carbon storage unit from the center and lower part of the space increases, and even if water passes through the granular activated carbon in a direction transverse to the direction of gravity, that is, in a horizontal direction, the granular activated carbon flows through the activated carbon. It is possible to flow evenly, and it is possible to effectively extract the filtering action of the granular activated carbon.

[Brief description of the drawings]

FIG. 1 is a perspective view of a filter cartridge of a filter according to an embodiment of the present invention in a partially cut state, FIG. 2 is a sectional view of a case member of the filter cartridge, and FIG. 3 is a conventional filter. 4 (a) is a plan view of the filtration cartridge, FIG. 4 (b) is a side view of the filtration cartridge, and FIG. 5 is a diagram of the filtration cartridge in FIG. FIG. 6 is a cross-sectional view of a state where only the case member of the filtration cartridge is cut along a line BB shown in FIG. 4 (b). FIG. 7 is an external perspective view of a conventional filter, and FIG. 8 is an external perspective view of a conventional filter. DESCRIPTION OF SYMBOLS 1 ... Case member, 2 ... Hollow fiber filter 3 ... Activated carbon storage part, 4 ... Cylindrical wall 5 ... Outer member, 6 ... Hold plate 7 ... Raw water side wall, 8, 9 ... Guide plate 10 ... Net filter, 11 ... Raw water side space 45 ... Ball for check valve

Claims (1)

(57) [Claims] 1. A filter body provided with a water receiving port at the upper part which can be connected to a water outlet of a faucet, an activated carbon accommodating section for accommodating granular activated carbon therein, and an end of the activated carbon accommodating section on the raw water inflow side. A mesh filter arranged to prevent the granular activated carbon from flowing out to the raw water side, and formed on the raw water side with respect to the activated carbon storage portion such that the net filter is interposed between the activated carbon storage portion. In a filter provided with a space and an inlet for allowing raw water flowing from the water receiving port to flow into the space, the inlet, the space, the mesh filter, and the activated carbon accommodating portion are sequentially arranged in a horizontal direction. The guide plate is disposed so that a guide plate that suppresses a water flow directed upward of the activated carbon storage unit above the inflow port in the space and directs the flow direction in the horizontal direction covers the upper part of the inflow port in the flow direction. space Filter, characterized in that it is projected from the inner wall surface configuration.