JPH0346823Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a filtration device that uses a filter element to remove particulate matter contained in a fluid.

[Summary of the idea]

The present invention is a filter device that uses a filter element to remove particulate matter contained in a fluid, and a colorimetric mark that cannot be penetrated by the fluid is provided on a part of the outer surface of the filter element to check the condition of this part. By allowing visual inspection from the outside, it is possible to easily know the condition of the filter element, especially when it is time to replace it.

[Conventional technology]

For example, filtration devices for water purification have been proposed that use replaceable filter elements to remove particulate matter contained in the water to be purified. That is, a filter element is interposed between the water inlet and outlet to purify water.

As a filter element, Utility Model 57-
Publication No. 95219, Japanese Unexamined Utility Model Publication No. 168213, Japanese Unexamined Patent Publication No. 1986-168213
As shown in Japanese Patent Application Laid-open No. 56-42310 and Japanese Patent Application Laid-Open No. 56-59120, it is known that the material is made of thread, fiber, porous membrane, cloth, paper, etc.

[Problem that the invention attempts to solve]

In such conventional filter devices, the timing of replacing the filter element becomes a problem. The performance of filter elements gradually deteriorates as they are used, but in the past there was no indication to identify them, and there were many cases in which filter elements were used with degraded performance.

In view of this, the present invention makes it possible to easily know the condition of the filter element, especially when it is time to replace it.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention provides a part of the outer surface of the filter element 6 with a colorimetric mark 9 that does not allow fluid to penetrate, for example, a part to which a plastic film is glued, and the filter element 6 is loaded. At least a portion of the holder 1 is formed transparent, and the filter element 6
The state of the colorimetric mark 9 can be visually inspected from outside the holder 1.

[Effect]

Through use, the filter element 6 becomes colored due to discoloration due to particulate matter, discoloration due to oxidation of iron, etc., except for the colorimetric mark 9 on the filter element 6, which is impermeable to fluid. The color difference with 9 becomes gradually clearer. The color difference between this colorimetric mark 9 and other parts allows the user to clearly know the condition of the filter element 6, especially when it is time to replace it.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to FIG.

In the figure, 1 is a cylindrical outer case having a bottom surface, and 2 is an upper cover. The outer case 1 is particularly made of a transparent material, such as transparent vinyl chloride or acrylic resin. Outer case 1 and upper cover 2
A packing 3 is placed between the and to prevent leakage.
These may be screwed together, for example. Incidentally, the upper cover 2 is formed with an inlet 4 and an outlet 5 for fluid such as water or air.

Further, 6 is a cylindrical filter element, which is loaded inside the outer case 1. The filter element 6 is pressed from above and below when the outer case 1 and the upper cover 2 are screwed together, and is stably held in that state. In this case, packings 7 and 8 are arranged above and below the filter element 6 to prevent internal and external leakage.

Furthermore, a colorimetric mark 9 that does not allow fluid to penetrate is formed on a part of the outer surface of the filter element 6. The method for forming this colorimetric mark 9 is as follows:
Generally speaking, methods include partially coating with an adhesive, pasting a sealant, pasting a plastic film, etc.
When the filter element 6 is composed of threads, fibers, porous membranes, etc. of heat-melting resin, the materials such as fibers and particles are fused together by applying heat locally to form an impermeable part. You can.
Alternatively, films made of the same material may be bonded by thermocompression. Further, as shown in FIG. 2, when the filter element 6 is a wave-shaped filter made of folded paper, cloth, etc., only the outer peripheral tip portion _l0 may be made an impermeable portion.

3A and 3B are partially cutaway views showing an example of the filter element 6. FIG. In the same figure, 6a is a porous cylinder that constitutes a support body, which is in the form of a thread wrapper with flanges on the top and bottom, 6b is a non-woven fabric layer made of fibers of acrylic and synthetic rubber resins, and , 6e is a nonwoven fabric adhesive layer, 6
d is a reinforcing thread or band. In this example, a transparent plastic film with predetermined characters cut out is pasted as a colorimetric mark 9 on a part of the surface of the nonwoven fabric layer 6b using an adhesive.

This example is configured as described above, and when fluid, such as water or air, flows in from the inlet 4 of the upper cover 2,
This fluid passes through the filter element 6 and is discharged from the discharge port 5 along the path indicated by the arrow.

In this case, as use progresses, the filter element 6 becomes colored (for example, dark brown) due to discoloration due to particulate matter or oxidation of iron, etc., except for the part of the filter element 6 with the colorimetric mark 9 that is not penetrated by the fluid. , the coloring gradually becomes darker. On the other hand, the color of the colorimetric mark 9 of the filter element 6 remains the same as the initial color (for example, white), and the color difference gradually becomes clearer. In the example of the filter element 6 shown in FIG. 3, as shown in FIGS. 4A to 4B, the color of the part of the character "Ka" gradually becomes darker (indicated by diagonal lines), and the color difference around it and there are clear. Become. here,
Since the outer case 1 is made of a transparent member as described above, the user can visually inspect this color difference from the outside.

Therefore, according to this example, the condition (performance) of the filter element 6, especially the time for replacement, can be clearly known from the color difference between the colorimetric mark 9 and other parts.

In the above-described embodiment, the outer case 1 is entirely transparent, but for example, only a portion of the filter element 6 corresponding to the colorimetric mark 9 may be made transparent.

Further, the position where the colorimetric mark 9 is provided is not limited to the side surface, but may also be provided on the top. For example, FIG. 5 shows an example of attaching the colorimetric mark 9 when using the silver activated carbon filter 10. The colorimetric mark 9 is formed on the upper prefilter 11, and Visual inspection is possible through a peephole 12. In Figure 5, 1
3 is an ABS resin body, 14 is a post filter, 15 is a water inlet pipe, 16 is an overflow pipe,
17 is a switching valve. Incidentally, FIG. 6 is a diagram when the colorimetric mark 9 is observed through the viewing window 12.

Further, in the above-described embodiment, the colorimetric mark 9 of the filter element 6 is configured so that the original color remains as it is;
It is also possible to set the color to correspond to the replacement time. In this case, when the color of the filter element 6 substantially matches the color of the colorimetric mark 9, it is time to replace it.

[Effect of idea]

According to the present invention described above, a colorimetric mark is provided on a part of the outer surface of the filter element to which fluids (liquids and gases) cannot penetrate, and the condition of this part can be visually inspected from the outside. The condition of the filter element, especially when it is time to replace it, can be easily determined by the color difference between this part and other parts. Therefore, there is an advantage that it is less likely to be used with degraded performance.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram showing one embodiment of the present invention;
4 to 4 are diagrams for explaining the same, FIG. 5 is a block diagram showing another embodiment of the present invention, and FIG. 6 is a diagram for explaining the same. 1...Outer case, 2...Upper cover, 6...Filter element, 9...Colorimetric mark.

Claims (1)

[Claims for Utility Model Registration] In a filter device that uses a filter element to remove particulate matter contained in a fluid, a part of the outer surface of the filter element is provided with a colorimetric mark that does not penetrate the fluid. , at least a portion of the holder into which the filter element is loaded is a transparent part that allows the color difference between the colorimetric mark to which the fluid does not permeate and the filter element to which the fluid permeates to be visually inspected from outside the holder; Features: