JP5123913B2 - Filtration device - Google Patents

Description

  The present invention relates to a filtration device for producing purified water by filtering raw water such as tap water.

  As a conventional filtration device, a prefilter is provided in a water passage to a cartridge enclosing a filter medium and a filter bed, and foreign substances are removed in advance from the raw water flowing into the cartridge by the prefilter, and the filter bed of the cartridge is clogged. There is known one capable of extending the time until the time is up (see, for example, Patent Document 1).

JP-A-60-244385

  However, in the above prior art, the prefilter can extend the replacement period due to clogging of the filter bed of the cartridge. However, the prefilter is configured as a single unit, and the single prefilter is detachable in the water passage to the cartridge. Is provided. For this reason, while the filter medium can be used and while the filter bed is clogged, it is necessary to replace the prefilter when the prefilter is clogged.

  When replacing the prefilter in this way, after preparing a new prefilter, remove the clogged old prefilter from the water channel, and then attach and regenerate the prepared new prefilter. Therefore, the replacement work of the prefilter becomes troublesome.

  Accordingly, an object of the present invention is to provide a filtration device that can easily regenerate a prefilter without preparing and attaching a new prefilter.

In the invention of claim 1, in the filtration apparatus provided with a cartridge for purifying the raw water introduced from the raw water inlet and discharging it from the purified water outlet, and providing a pre-filter in the water passage leading to the raw water inlet, the pre-filter , each independently composed of a plurality of filter alone arranged in series, each of the filter alone provided to be one by one removed from an upstream side of the water inlet direction through the mounting portion to the water passage, the mounting the parts, a support rod projecting toward the upstream from the upstream side periphery of the raw water inlet, said formed into filter alone was configured with a mounting hole to be press-fitted to the support rod, the filter alone , it is projected a part of the outer periphery of the filter alone provided knobs, the knobs, provided by the respective filter alone at different relative positions with respect to the mounting hole And wherein the door.

According to the first aspect of the present invention, the pre-filter is composed of a plurality of single filters, and each of them can be removed. Therefore, when the single filter is clogged with foreign matter contained in the raw water, the clogged single filter is removed. By removing the filter, the remaining filter can be reproduced as a new prefilter. Therefore, by providing the number of filter units corresponding to the expiration date of the cartridge in advance, the clogged filter unit is only removed thereafter. This eliminates the need for preparing and attaching a new prefilter, thereby simplifying the prefilter regeneration operation. Moreover, since the filter unit can be removed one by one from the upstream side in the raw water inflow direction, the filter unit is sequentially clogged from the upstream side in the raw water inflow direction, and the prefilter is clogged. At this time, by removing one by one from the upstream filter unit, it is possible to increase the number of regenerations in the entire prefilter and extend the expiration date of the prefilter. Further, since the knobs are provided at different positions of the filter unit, when removing the filter unit, the filter unit can be easily removed by picking the knob of the filter unit to be removed. In addition, since the mounting portion is configured to include a support rod protruding from the upstream peripheral portion of the raw water inlet and a mounting hole formed in the filter alone, the mounting hole is press-fitted into the support rod. Thus, the filter unit can be easily attached, and at the time of removing the filter unit, the filter unit can be easily removed by pulling the filter unit in the direction in which the mounting hole is removed from the support rod.

It is sectional drawing which shows typically the filtration apparatus concerning one Embodiment of this invention. It is a bottom view which shows typically the filtration apparatus shown in FIG. It is a disassembled perspective view of the pre filter used for the filtration apparatus shown in FIG. It is principal part sectional drawing which shows typically the modification of the attaching part provided in the filtration apparatus of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 3 are diagrams showing a filtration device according to an embodiment of the present invention.

  As shown in FIG. 1, the filtration apparatus 1 of this embodiment has the cartridge 2 which purifies and filters raw | natural water and purifies it. That is, the cartridge 2 is generally configured by housing a filter medium 4 and a hollow fiber membrane 5 as a filter bed in a cartridge container 3 provided with a raw water inlet 21 and a purified water outlet 22. The cartridge container 3 includes a filter medium storage container 31 in which the filter medium 4 is stored and the raw water inlet 21 is formed, and a filter bed storage container 32 in which the hollow fiber membrane 5 is stored and the water purification outlet 22 is formed. .

  The filter medium storage container 31 and the filter bed storage container 32 are arranged in a coaxial direction, each is formed in a bottomed cylindrical shape with one end opened, and the respective open ports 31a and 32a are joined together in a watertight manner. As a result, a sealed container is formed as a whole. At this time, the open port 32a of the filter bed storage container 32 is formed to have a smaller diameter than the open port 31a of the filter medium storage container 31, and a step portion 3S is provided between the open ports 31a and 32a.

  The raw water inlet 21 is formed at substantially the center of the bottom 31b of the filter medium storage container 31, and the purified water outlet 22 is formed at substantially the center of the bottom 32b of the filter bed storage container 32. These raw water inlet 21 and purified water outlet 22 is provided at both end portions facing each other on the central axis of the cartridge container 3 in which the filter medium storage container 31 and the filter bed storage container 32 are combined.

  The filter medium 4 is formed of activated carbon, ceramic, ion exchange resin or the like, and purifies water by adsorbing and removing harmful components such as chalk contained in raw water. The filter medium 4 of the present embodiment is formed in a substantially cylindrical shape with a central hole 41 formed on the central axis, and both ends in the axial direction thereof are closed by end plates 42 and 43. At this time, the outer diameter of the filter medium 4 is formed smaller than the inner diameter of the filter medium storage container 31, and the raw water flow path 33 is provided between them. The inner and outer peripheries of the filter medium 4 are formed by being covered with a mesh (not shown) and filled with a granular filter medium.

  The end plate 42 facing the raw water inlet 21 is formed to have substantially the same diameter as the outer diameter of the filter medium 4, and the end plate 43 disposed in the opening 31 a of the filter medium storage container 31 has an inner diameter of the filter medium storage container 31. The outer peripheral edge 43a of the end plate 43 is abutted against the step 3S described above. A communication hole 43b having substantially the same diameter as the center hole 41 of the filter medium 4 is formed at the center of the latter end plate 43, and the center hole 41 of the filter medium 4 and the filter bed storage container 32 are formed through the communication hole 43b. The inside communicates.

  Accordingly, the raw water that has flowed into the filter medium storage container 31 from the raw water inlet 21 flows into the raw water flow path 33 after hitting the end plate 42, and then flows into the filter medium 4 from the entire area of the raw water flow path 33. The raw water that has flowed into the filter medium 4 passes through the filter medium 4 to be purified and reaches the center hole 41, and passes through the communication hole 43 b of the end plate 43 from the center hole 41 and flows into the filter bed storage container 32. In the filter bed storage container 32, foreign matter mixed in water is filtered through the hollow fiber membrane 5, and the filtered purified water is discharged from the purified water outlet 22. At this time, it is preferable that the filter medium 4 has an expiration date when adsorption of harmful components is saturated, and the hollow fiber membrane 5 has an expiration date when clogged with foreign matter, and the respective expiration dates are preferably the same.

  However, the filter medium 4 and the hollow fiber membrane 5 have different expiry dates depending on the amount of harmful components and foreign matters contained in the raw water, and in the raw water containing a large amount of foreign matter, the hollow fiber membrane is used before the filter media 4 reaches the expiry date. 5 is the expiry date, and the cartridge 2 must be replaced even though the purification ability of the filter medium 4 remains.

  Therefore, by providing the pre-filter 10 in the water passage 6 that leads to the raw water inlet 21 and removing foreign matters from the raw water in advance, the burden on the hollow fiber membrane 5 is reduced, that is, foreign matters that are captured by the hollow fiber membrane 5. It is possible to extend the expiry date by reducing the amount.

  Here, in the present embodiment, as shown in FIG. 1, the prefilter 10 described above is composed of a plurality of filter single bodies 11 that are independently arranged in series, and each filter single body 11 is connected to a water passage 6. It is detachably provided through the attachment portion 7. As shown in FIGS. 2 and 3, the filter unit 11 is formed of a circular filter material having an area larger than the opening area of the raw water inlet 21, such as a nonwoven fabric or filter paper. In FIG. 1, for convenience, adjacent filter units 11 are shown apart from each other, but actually, adjacent filter units 11 are attached in close contact with each other.

  As shown in FIG. 1, the mounting portion 7 is formed on the support rod 71 projecting upstream from the upstream peripheral portion 21 a of the raw water inlet 21, and on the filter unit 11 as shown in FIGS. 2 and 3. And a mounting hole 12 that is press-fitted into the support rod 71.

  As shown in FIG. 1, the support rods 71 are formed in a column shape having a predetermined cross-sectional length, and a pair of the support rods 71 are opposed to each other with the raw water inlet 21 interposed therebetween. It protrudes integrally from 31b outward.

  As shown in FIGS. 2 and 3, a pair of mounting holes 12 are formed at both ends in the diameter direction of the filter unit 11 formed in a circular shape, and the distance between the mounting holes 12 corresponds to the distance between the pair of support rods 71. It has become. At this time, the hole diameter of the mounting hole 12 is formed to be slightly smaller than the diameter of the support rod 71, and when fitted to the support rod 71 of the mounting hole 12, an appropriate frictional force acts between them, and the filter The single body 11 is not easily dropped off.

  At this time, a slit 13 that is continuous with the mounting hole 12 is formed on the peripheral edge of the mounting hole 12 so as to be opposed. By providing the slit 13, the tolerance of the diameter change of the mounting hole 12 is increased. It is easy to remove (remove) the filter unit 11 from the support rod 71. Since the slit 13 is provided in this way, it is possible to provide a flange 72 having a slightly larger diameter at the tip of the support rod 71, as shown in FIG. It can be surely prevented. Moreover, when the collar part 72 is provided in this way, it is easy to mount the filter unit 11 at the time of initial setting by sharpening the tip part thereof at an acute angle.

  The filter unit 11 attached to the support rod 71 can be removed one by one (one sheet) from the upstream side (the lower side in the figure) in the raw water inflow direction indicated by the arrow a in FIG.

  At this time, as shown in FIGS. 2 and 3, the filter unit 11 is provided with knobs 14 at different positions. That is, the knob 14 is provided by projecting a part of the outer periphery of the filter unit 11, and the knob 14 has a different relative position to the mounting hole 12 in each filter unit 11. Note that the number of the filter single bodies 11 shown in FIG. 1 is partially omitted for convenience, and is different from the number of the single filter bodies 11 (knobs 14) shown in FIG.

  With the above configuration, according to the filtration device 1 of the present embodiment, the pre-filter 10 is constituted by the plurality of filter single bodies 11 and each of them can be removed, so that the filter single body 11 is clogged with foreign matters contained in the raw water. In this case, only by removing the clogged filter unit 11, the remaining filter unit 11 can be regenerated as a new prefilter 10. Therefore, by providing in advance the number of filter units 11 corresponding to the expiration date of the cartridge 2, specifically the expiration date of the clogging of the hollow fiber membrane 5, it is only necessary to sequentially remove the clogged filter units 11. Become. This eliminates the need to prepare and attach a new prefilter, thereby simplifying the regeneration of the prefilter 10.

  Further, even when a plurality of filter units 11 are provided, the filter units 11 are sequentially clogged from the upstream side in the raw water inflow direction. According to this embodiment, the plurality of filter units 11 are Since it can be removed one by one from the upstream side in the raw water inflow direction, when the prefilter 10 is clogged, the number of regenerations in the entire prefilter 10 is increased by removing one piece from the upstream filter unit 11 one by one. Thus, the expiration date of the prefilter 10 can be extended.

  Further, since the plurality of filter units 11 are provided with knobs 14 at different positions, when removing the filter unit 11, the filter unit 11 can be removed by picking the knobs 14 of the filter unit 11 to be removed. Can be easily done. In this case, the filter unit 11 to be removed can be clearly taught to the user by entering the removal order in the knob 14 in advance.

  Furthermore, the attachment portion 7 for attaching the filter unit 7 to the water passage 6 is configured to include a support rod 71 protruding from the upstream peripheral portion 21 a of the raw water inlet 21 and an attachment hole 12 formed in the filter unit 11. Therefore, by press-fitting the mounting hole 12 into the support rod 71, the filter unit 11 can be easily attached, and when the filter unit 11 is removed, the mounting hole 12 is detached from the support rod 71. By pulling the filter unit 11, it can be easily removed.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various modifications can be made. For example, you may comprise so that removal of a removal substance may be controlled by varying the thickness and kind of the several filter single body 11 laminated | stacked. Further, the cross-sectional shape of the cartridge 2 and the shape of the prefilter 101 are not limited to a circular shape, and can be provided as any other shape. Further, the position and shape of the filter medium 4 and the hollow fiber membrane 5 accommodated in the cartridge 2 and the function thereof are not limited to the present embodiment, and it is sufficient that the filter medium 4 has a function of purifying and filtering raw water.

DESCRIPTION OF SYMBOLS 1 Filter 2 Cartridge 21 Raw water inlet 21a Upstream peripheral part of raw water inlet 22 Water purification outlet 4 Filter medium 5 Hollow fiber membrane (filter bed)
6 Water passage 7 Mounting portion 71 Support rod 10 Pre-filter 11 Filter unit 12 Mounting hole 14 Knob

Claims (1)

In the filtration apparatus provided with a cartridge for purifying the raw water introduced from the raw water inlet and discharging it from the purified water outlet, and providing a pre-filter in the water passage leading to the raw water inlet,
The pre-filter is composed of a plurality of single filters that are independently arranged in series, and each single filter can be removed one by one from the upstream side in the raw water inflow direction through an attachment portion in the water passage. Provided ,
The mounting portion comprises a support rod that protrudes upstream from the upstream peripheral portion of the raw water inlet, and a mounting hole that is formed in the filter alone and is press-fitted into the support rod .
A filtering device , wherein the filter unit is provided with a knob by projecting a part of the outer periphery of the filter unit, and the knob is provided with a relative position with respect to the mounting hole being different for each filter unit.

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