WO2014119530A1

WO2014119530A1 - Water purifier

Info

Publication number: WO2014119530A1
Application number: PCT/JP2014/051737
Authority: WO
Inventors: 高島孝輔; 植松信機; 磯部卓
Original assignee: 東レ株式会社
Priority date: 2013-02-01
Filing date: 2014-01-28
Publication date: 2014-08-07
Also published as: TW201440866A; JPWO2014119530A1; TWI604877B; CN104955773A; JP6435859B2; CN104955773B

Abstract

　The purpose of the present invention is to provide a water purifier that is sufficiently compact and exhibits little pressure loss in the connection pipes, despite having a plurality of filters arranged in a parallel layout. Specifically provided is a water purifier in which three or more columnar filters having an inlet and an outlet at one end are provided to a flow channel connecting a raw water inlet and a purified water outlet, said water purifier being characterized in that at least two of the filters are arranged in parallel in the flow channel, and the total of the bend angles in the channel formed by the connection pipes for one set of filters arranged in parallel is 200° or less.

Description

Water purifier

The present invention relates to a water purifier for purifying tap water in general households.

Water purifiers used in general households, especially under sink water purifiers installed at the bottom of sinks, have a large capacity and a long filtration life (large water purification capacity), each storing different types of filter media. Some of them are equipped with multiple filters. And in the water purifier which has such a some filter, in order to ensure sufficient filtration flow volume, as described in patent document 1, for example, it arrange | positions some filters to comprise in parallel. ing.

The water purifier of Patent Document 1 is designed to be compact by being configured to be housed in a flat housing, however, the arrangement of a plurality of filters is in a horizontal row, and its connection The pipe is bent many times in a complicated manner to surround the filter (the right-angle bend is 3 times or more) and is long and occupies a large space. Therefore, the water purifier has a large pressure loss in the connecting pipe. There was a problem that it was not compact enough.

JP 2007-289888 A

An object of the present invention is to provide a sufficiently compact water purifier that has a plurality of filters and includes a parallel arrangement of filters, and has a small pressure loss in a connection pipe and is sufficiently compact. .

In order to solve the above problems, the water purifier of the present invention has the following configuration. That is,
(1) A water purifier in which three or more columnar filters each having an inlet and an outlet on one end side are disposed in a flow path connecting a raw water inlet and a purified water outlet, and at least two of the filters. One filter is arrange | positioned in parallel in the said flow path, and the total value of the bending angle in the connection piping path | route which concerns on one set of the said parallel arrangement is 200 degrees or less, It is a water purifier characterized by the above-mentioned.
(2) It is preferable that the three or more filters are arranged in two rows, and the number of bends in the connection piping path related to one set of the parallel arrangement is two.
(3) The three or more filters are arranged in two rows, and the two-row arrangement is preferably a staggered arrangement.
(4) It is preferable that the connection piping route according to the parallel arrangement is a route having the same shape.
(5) The filters arranged in parallel are preferably the same type of filters.
(6) It is preferable that the filters arranged in parallel have the same pressure loss and filtration performance.
(7) It is preferable that the filter includes a filter head portion having an inlet and an outlet, and a filter cartridge, and the shape of the filter head portion is the same.
(8) The three or more filters are arranged in two rows, and the respective inlets and outlets of the filters are arranged on a straight line, and the straight line and the central axis of the two-row arrangement row are parallel to each other. Is preferable.
(9) It is preferable that each of the plurality of branch pipes according to the parallel arrangement is a single resin molded pipe.
(10) It is preferable that the plurality of branch pipes according to the parallel arrangement have the same shape.
(11) The three or more filters are arranged in two rows, and the distance between the central axes of the two rows arranged in the two rows is preferably smaller than the outer diameter of the filter.
(12) The filter medium housed in the filters arranged in parallel is an adsorbent configured in a columnar shape or a cylindrical shape whose axial length is longer than the radial length, and the flow path direction in the adsorbent is An axial direction is preferred.
(13) The filter medium housed in the filters arranged in parallel is preferably activated carbon.

The present invention can achieve the following excellent effects by the above configuration. That is,
With the configuration (1), not only can the pressure loss of the filter parts arranged in parallel be reduced, but also the pressure loss can be reduced as a connection piping path according to the parallel arrangement. As a result, the flow rate as a water purifier can be increased.

Also, with the configuration of (2) above, in addition to the effects of the above (1) configuration, the connection piping path related to the parallel arrangement is simpler and more compact than the conventional connection method.

In addition, with the configuration of (3) above, even if the two rows are arranged in parallel, the second row filter is located between the first row filters because the second row filter is located between the first row filters (the front side of the water purifier). ) Is easy to access the second row filter, and is convenient for replacement and maintenance.

Also, with the configuration of (4) above, it is possible to make the two connection piping paths related to the parallel arrangement have the same pressure loss, which contributes to the same flow rate of the two filters arranged in parallel.

In addition, the life of filters arranged in parallel can be made substantially the same by the configuration of (5) above, and there is no waste that can be replaced midway when one of them can be used. So it is the most economical.

Further, with the configuration of (6) above, the effect of the configuration of (5) can be further ensured.

Also, with the configuration of (7) above, there is only one type of mold for the filter head, which contributes to low-cost manufacturing and does not cause assembly errors.

Also, with the configuration of (8) above, the branch pipe has a simple shape that is easy to pipe.

In addition, the configuration (8) makes piping work simple and easy without requiring many members such as a plurality of pipe joints such as tubes, tees and elbows that are normally used. Moreover, since the branch pipe is a resin molded pipe, it is inexpensive.

Also, with the configuration of (10) above, there is one type of branch piping, contributing to low cost manufacturing and no assembly errors.

Also, with the configuration of (11) above, a compact arrangement in the depth direction is possible even in a parallel arrangement, and the entire water purifier is also compact.

Also, with the configuration of (12) above, the risk of short path is less than that of the filter material in the radial flow path, and the cost is low and the diameter can be reduced, so the pressure resistance of the filter is large.

Also, with the configuration of (13) above, a filter using activated carbon with a large pressure loss as a filter medium is usually arranged in parallel in the entire water purifier, and the effect of reducing the pressure loss and increasing the flow rate of the water purifier is great.

The front view of the water purifier which concerns on one Embodiment of this invention, a top view, a right view, a perspective view The top view of the branch piping which concerns on one Embodiment of this invention BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view, a front view, and a transverse sectional view of a filter head, a filter cartridge, and a mounting plate according to an embodiment of the present invention The longitudinal cross-sectional view regarding the filter head part which concerns on other embodiment of this invention, a filter cartridge, and a mounting plate, a front view, a cross-sectional view The longitudinal cross-sectional view of the filter cartridge by the adsorption filtration which concerns on one Embodiment of this invention The longitudinal cross-sectional view of the filter cartridge as a pre filter which concerns on one Embodiment of this invention The longitudinal cross-sectional view of the filter cartridge by the membrane filtration which concerns on one Embodiment of this invention The schematic plan view of the filter connection piping path which concerns on the embodiment of this invention Schematic plan view of a filter connection piping path according to another embodiment of the present invention Schematic plan view of a filter connection piping path according to another embodiment of the present invention Schematic plan view of a filter connection piping path according to an embodiment not belonging to the present invention

Hereinafter, exemplary embodiments of the present invention will be described with reference to the drawings.

The “filter for water purifier” in the present invention is hereinafter simply referred to as “filter”.

FIG. 1 shows a water purifier according to an embodiment of the present invention. 1A is a front view, FIG. 1B is a plan view, FIG. 1C is a right side view, and FIG. 1D is a perspective view.

As shown in FIG. 1, the water purifier 1 according to the present embodiment basically includes a filter 2 including a filter head portion 4 and a filter cartridge 5, a mounting plate 3, and a pipe 6.
A plurality of filters 2 are provided, and a plurality of pipes 6 are connected between the filters 2 so that tap water, which is a treatment target of the water purifier, can be distributed.

Each filter head portion 4 of the plurality of filters 2 has an inlet 7 and an outlet 8 as tap water flow paths, and the filter 2 has a columnar shape and has an inlet and an outlet at one end thereof. Is. Compared to a filter having an inlet and an outlet at both ends, such a type of filter has an advantage that the pipe connections can be integrated into one end and configured compactly. In particular, in a water purifier having a plurality of filters, the advantage is remarkable. In FIG. 1 (A), the inlet 7 of the filter head part 4 located at the left end is the raw water inlet 9 of the water purifier 1, and the raw water inlet 9 is connected to a raw water inlet pipe via a separately prepared faucet. Are connected to supply tap water as raw water. Moreover, in FIG. 1 (A), the outlet 8 of the filter head part 4 located in the right end is the purified water outlet 10 of the water purifier 1, and a separately prepared purified water outlet pipe is connected to the outlet of the purified water outlet pipe. The end will be connected to a water purification nozzle that discharges purified water directly or once through the faucet to the user.

A plurality of filters 2 are arranged in a flow path connecting between the raw water inlet 9 and the purified water outlet 10, and the raw water supplied to the raw water inlet 9 is purified through the plurality of filters 2. It flows out from the outlet 10 as purified water.

In the water purifier 1 of the embodiment of FIG. 1, four filters 2 are connected. In order from the upstream side of the flow path, the first filter, the second filter arranged in parallel and connected, the third filter, and the fourth filter will be referred to. These four filters have the same outer shape and are interchangeable in connection structure, but the filter media stored in the filter cartridge are different and have different filtration functions and methods. Yes. The following functions, methods, and configurations are preferable respectively. That is, the first filter is a pre-filter, and is present in tap water using a non-woven fabric made of resin (polypropylene, polyethylene, etc.) with moderate filtration accuracy (about 1 to 10 μm) or a molded body by melt blown as a filter medium. Roughly remove and filter out the waste and relatively large particulate impurities. The second filter and the third filter arranged in parallel in the flow path are the same or the same type of adsorptive filtration filters having the same or similar pressure loss and filtration performance (filtration capability and removal performance), such as activated carbon. Using as a filter medium, residual chlorine, odor, and harmful organic substances (such as trihalomethane) that can be contained in tap water are adsorbed or decomposed to remove them. The fourth filter is a filter by membrane filtration, and filters fine particles, turbid components, bacteria, and the like that can be contained in tap water using a hollow fiber membrane having fine pores as a filter medium.

When there are many turbid components in tap water, an embodiment in which filters by membrane filtration are arranged in parallel is also possible. If it does so, the effect of the lifetime improvement of the filtration performance of the filter part by membrane filtration and a pressure loss reduction can be acquired. Similarly, when the tap water contains a lot of relatively large garbage, an embodiment in which prefilters are arranged in parallel is possible and effective.

As can be seen from FIG. 1B, the four filters 2 are arranged in two rows and in a staggered arrangement in a plan view (viewed in the axial direction of the columnar filter 2). In addition, in the connection piping route related to the parallel arrangement of the second filter and the third filter (that is, the connection piping route that branches from one for parallel arrangement and then merges again and returns to one), the route The number of bends is 2 in both paths related to the parallel arrangement. In FIG. 1 (B), the bending of the connecting piping path is a right angle (90 degrees). That is, the total value of the bending angles in the connection piping path related to the parallel arrangement is 180 degrees. It is within the scope of the present invention that the total value of the bending angle including the design margin and manufacturing error is 200 degrees or less. Here, the bend in the connection pipe path is a bend for the path of the connection pipe, and is defined as not including a bend relating only to the flow path inside the filter. Usually, there is also a flow path bend in the filter composed of a filter head portion having an inlet and a discharge opening and a filter cartridge, and the total value of the bend angles in the filter internal flow path exceeds 200 degrees. Therefore, setting the total value of the bending angles in the connection piping path related to the parallel arrangement to 200 degrees or less is important for reducing the pressure loss of the connection piping path from the filter portion and reducing the pressure loss of the entire water purifier. And it is an effective requirement. In the present invention, the bending of the connection piping path includes all the bendings that change the direction of the connection piping path from a straight line by a predetermined angle and cause significant pressure loss as a flow path. A bend of an angle other than a right angle or a single arc-like bend is also a bend. In the arc-like bending, the bending angle is defined by the angle at which the tangents to the arc intersect at both end points of the arc (see FIG. 9B described later). Further, not only the bending in the plane perpendicular to the axial direction of the columnar filter 2 but also the bending to the outside of the plane (vertical direction) is included. Thus, since the total value of the bending angles in the connection piping path according to the parallel arrangement is set within a limited range of 200 degrees or less, the parallel arrangement can not only reduce the pressure loss of the filter portion, but also relates to the parallel arrangement. The pressure loss can also be reduced as a connection piping route compared to the conventional connection method. In addition, since the filters are arranged in parallel with the number of bends twice, a rational arrangement design can be made as a connection piping path related to the parallel arrangement, and more simple and compact than the conventional connection method, and pressure loss can be reduced. That is, the pressure loss of the connection piping path is not impaired for the purpose of reducing the pressure loss of the filter portion by the parallel arrangement. As a result, the flow rate as a water purifier can be increased.

In the embodiment of FIG. 1B, the bending angle is a right angle (90 degrees), and the connection piping path according to the parallel arrangement is formed by two turns. Of course, the angle of the bending angle is smaller (for example, 45). There may be another embodiment in which the degree is bent twice (see FIG. 9A described later). Thus, the pressure loss at the bending can be further reduced when the total value of the bending angles is small. However, in that case, in order to avoid interference between the filters, it is necessary to make the piping path of the straight portion longer than that in FIG. 1B, and accordingly, the lateral length of the water purifier also becomes longer.

In addition, for the convenience of water purifier design, for example, in order to avoid interference with an accessory near a filter or piping, there may be an embodiment in which the connection piping path related to the parallel arrangement is bent more than twice (for example, four times). Even in such a case, the bending angle of one bend is reduced and the total value of the bend angles is kept at 200 degrees or less, so that the pressure loss in the connecting piping path can be reduced.

In FIG. 1 (B), the connecting piping paths related to the parallel arrangement are paths having the same shape. Thereby, two connection piping paths concerning parallel arrangement can be made into the same pressure loss. And the life of the same or the same type of filters 2 arranged in parallel can be made substantially the same, and there is no waste that they can be replaced midway though one of them can be used, and they are replaced at the same time. So it is the most economical. Of course, filters of different types and different performances may be arranged in parallel, and this is also included in the present invention.

Also, the distance between the central axes of the two rows arranged in two rows is set to be smaller than the outer diameter size of the filter 2. Due to such a parallel arrangement of two rows, a compact arrangement in the depth direction is possible, and the entire water purifier is also compact.

Further, in FIG. 1, the respective inlets and outlets (the inlet 7 and outlet 8 of the filter head 4) of the filter 2 are arranged on a straight line, and the straight axis and the central axis of the two rows of rows are arranged. Are parallel. And the some piping 6 which connects the some filter 2 is related to parallel arrangement | positioning, is a branch piping, and each is comprised with the single resin molding pipe | tube. Moreover, the plurality of branch pipes are the branch pipes 6 having the same shape shown in FIG. This branch pipe 6 is of a type in which the tip is inserted and connected, and can be easily inserted and connected to the inlet 7 or outlet 8 of the filter head portion 4 with one touch. Moreover, the shape of the filter head part 4 of the some filter 2 is also the same shape. Because of the arrangement and shape of the filter 2 and the filter head portion 4 and the pipe configuration as described above, the branch pipe 6 has a simple shape, and there are many pipe joints such as tubes, tees and elbows that are normally used. The piping work is simple and easy without the need for the above member. Further, since the branch pipe 6 is a resin-molded pipe, it is inexpensive, and the required branch pipe 6 has the same shape and requires only one type, so that the branch pipe 6 has only one type of resin molding die. It is connected, contributes to cheap manufacturing, and does not cause assembly errors. The same effect can be obtained when the shape of the filter head portion 4 is the same shape and one type. On the other hand, of course, in the parallel arrangement shown in FIG. 1, it is also possible to adopt a form in which the branch pipe uses a normal tube and a pipe joint of a tee or an elbow, which is also included in the present invention. By doing so, the merit that a member is easy to obtain and excellent in versatility can be obtained.

In the water purifier 1 of the embodiment of FIG. 1, the filter 2 has four configurations, but a configuration in which three (three) or more filters are arranged including at least two (two) filters related to the parallel arrangement. If it is this water purifier, the parallel arrangement | sequence of 2 rows zigzag arrangement | sequence can be implement | achieved and the above-mentioned effect | action and effect can also be acquired.

FIG. 8 shows the embodiment of FIG. 1 and other modified examples of the present invention, using a schematic plan view of a connection piping path related to the parallel arrangement of filters. In FIG. 8, circles represent filters (and filter head portions), and straight lines between the circles represent piping.

9 and 10 are schematic plan views of connection piping paths relating to the parallel arrangement of filters according to the embodiment of the present invention, which are different from those in FIG. On the other hand, FIG. 11 is a schematic plan view of a filter connection piping path in an embodiment that does not belong to the present invention (part relating to parallel arrangement thereof). 9, 10, and 11, circles and straight lines have the same meaning as in FIG. 8.

In any of the examples of FIG. 8, the total value of the bending angles in the connection piping path according to the parallel arrangement is 180 degrees (200 degrees or less), the number of bendings is 2, and the connection piping. The route is a route having the same shape. Although not shown in the drawings, for example, there may be a form in which the bending angles are different in the two connection piping paths according to the parallel arrangement so that the shapes of the two connection piping paths are not the same.

FIG. 8 (A) corresponds to FIG. 1 (B). FIG. 8B is an example of a two-column parallel arrangement that is not a staggered arrangement. FIG. 8C shows an example in which two sets of staggered parallel arrangement exist. In each of the groups arranged in parallel, the total value of the bending angles in the connection piping path is 200 degrees or less, and the number of bendings is two. FIG. 8D is a modification of FIG. 8B, in which filters arranged in parallel are arranged as horizontal positions and are compact in the horizontal direction, but in the figure, the vertical direction is shown in FIG. ) To (C) are more compact because the distance between the central axes of the two rows arranged in two rows is set to be smaller than the outer diameter of the filter.

In FIGS. 8A to 8D, the respective inlets and outlets of the filter are arranged on a straight line, and the straight line and the central axis of the two-row arrangement row are parallel to each other, The plurality of branch pipes according to the parallel arrangement are branch pipes having the same shape, and the shape of the filter head part is also the same shape. For this reason, there is only one kind of branch pipe and filter head, which contributes to low-cost manufacturing and does not cause assembly errors.

8E to 8G, the filter head portion is not the same shape but has two types of filter head portions. Among the two types, the filter head portion itself includes a type of filter head portion in which the branching of the parallel arrangement and the bending of the piping path are made. By applying such a filter head portion, a more compact arrangement in the lateral direction is realized as compared with FIG.

8 (F) and 8 (G) are also examples of a staggered parallel arrangement, and the distance between the central axes of the two rows arranged in two rows is smaller than the outer diameter of the filter. Not only is it set, but also in the horizontal direction, the distance between the perpendiculars to the central axis of each row that passes through the filter center is set to be smaller than the outer diameter dimension of the filter. It is also compact in direction. Moreover, since it is a staggered arrangement, the second row filter (in the vertical direction, ie, the depth direction as a water purifier) is located between the first row filters while being compact, so the first row side (the front side of the water purifier) ) Is easy to access the second row filter, and is convenient for replacement and maintenance.

8E and 8F, the pipes between the filters are not the same shape but have two types of pipes. On the other hand, in FIG. 8G, the plurality of branch pipes according to the parallel arrangement are branch pipes having the same shape.

FIG. 9A is a form in which each bending angle is 45 degrees in FIG. 8A, and the total value of the bending angles is 90 degrees. In FIG. 9A, since the total value of the bending angles is smaller than that in FIG. 8A, the pressure loss at the bending can be further reduced. However, in order to avoid interference between the filters, the piping path of the straight portion becomes longer than that in FIG. 8A, and accordingly, the lateral length of the water purifier also becomes longer.

The above-described form is a form in which the pipes are connected at a predetermined angle, but the same definition can be made even if the bend is an arc-like bend. For example, FIG. 9B shows a form in which the curve is a circular curve in FIG. Since the pipes are not connected at a predetermined angle but are drawn in an arc, it is difficult to define the bending angle. Therefore, the intersection angle between the tangents to the arc at the two end points of the arc is obtained, and the intersection angle is regarded as the bending angle. That is, in the form of FIG. 9B, since the intersection angle between the tangents to the arc at the two end points of the arc is 90 degrees, the total value of the bending angles in the connection piping path according to one set is the bending angle. Is 90 degrees because there are two 90 degree bends. In the form of an arc-shaped bend, the total value of the bend angles in the connection piping path related to one set can be obtained by obtaining the angle as described above.

In any of the examples in FIG. 10, the total value of the bending angles in the connection piping paths related to the parallel arrangement is 200 degrees or less, and the connection piping paths have the same shape. And the several branch piping which concerns on parallel arrangement | positioning is the same shape branch piping, and the shape of a filter head part is also the same shape.

10 (A) and 10 (B) are embodiments in which the filters are not arranged in two rows but arranged in one row and three rows, respectively. In both cases, the number of bends is four, but the bend angle is as small as 45 degrees, the total value of the bend angles is 180 degrees, and the pressure loss as a connecting piping path can be reduced. Fig. 10 (A) is suitable for reducing the depth of the water purifier (vertical direction in the figure), and Fig. 10 (B) is for making the horizontal dimension compact while maintaining a clean symmetrical arrangement. It can be adopted.

In FIGS. 8 to 10 described above, the embodiments of the present invention have been described using schematic plan views. Therefore, it is assumed that the bend in the connection piping path is in the plane, but the bend is out of the plane. Even if it is a bend to (up-down direction), if the total value of the bend angle is 200 degrees or less, it is included in the present invention. In particular, the curve in FIG. 10A arranged in a single row may be in the upward direction out of the plane, and in this form, the depth of the water purifier (vertical direction in the drawing) can be made more compact.

On the other hand, in the example of FIG. 11 shown as a comparative example, the bending angle in the connection piping path according to the parallel arrangement is 90 degrees, the number of bendings is 4, and the total value of the bending angles is 360 degrees, which is 200 degrees. Is over. Therefore, the connection piping path has a large pressure loss. (By the way, in the water purifier of Patent Document 1, in the form similar to FIG. 11 (A), in the connection piping route according to the parallel arrangement, 5 times outside the plane (downward) orthogonal to the axial direction of the columnar filter. (It has a 90 degree bend and its total value is 450 degrees, which is different from the present invention.)
In addition, in the invention part other than the invention relating to the parallel arrangement in the present invention, the arrangement and configuration of the plurality of filters are not limited to those described above, and the quality of the tap water in the target area and the target are required. Depending on the flow rate or the like, for example, it is possible to change to a configuration in which all four are arranged in series, or a configuration in which the total value of the bending angles in the connection piping path related to one set in parallel arrangement exceeds 200 degrees.

Next, the structure and configuration relating to the coupling between the filter head unit 4 and the filter cartridge 5 constituting the filter 2 will be described. In addition, the structure and configuration of fixing the filter 2 to the mounting plate 3 will also be described.

In water purifiers or filters for water purifiers used in general households, various structures that allow the filter cartridge to be attached to and detached from the filter head connected to the tap water pipe have been devised and used so that the filter cartridge can be easily replaced. Has been. Among them, it is common practice to attach and detach the filter cartridge to and from the filter head by a mechanism that rotates, such as a bayonet mechanism or a screw fastening mechanism.

For example, in the water purifier disclosed in Japanese Patent Application Publication No. 2010-504185, which is a patent document, a fixing member is inserted into the slide path of the circular cap on the upper outer peripheral surface of the filter cartridge, and is rotated and fixed to the circular cap. . At that time, the protrusion formed at the lower portion of the circular cap is inserted into a guide groove formed in a curved shape along the upper surface of the filter cartridge, and the rotational movement of the filter cartridge is guided. However, there is a problem that the user cannot accurately determine when and where the fixing and mounting by the rotational motion are completed. Then, in view of such a problem, it is meaningful to provide a water purifier and a filter water purifier that allow the user to surely know the completion of the mounting of the filter cartridge to the filter head.

In addition, in the case of water purifiers used in general households, especially undersink type water purifiers that are installed at the bottom of a sink, a water purifier filter is attached to attach the water purifier to the wall of the storage section at the bottom of the sink. Generally, fixing to a plate and attaching the mounting plate to a wall surface of a storage unit is performed. The filter is usually composed of a filter head portion and a filter cartridge, and the filter is often fixed to the mounting plate by fixing the filter head portion to the mounting plate.

For example, in Japanese Patent Laid-Open No. 2012-143709, which is Patent Document 1, the filter head portion is fixed to a mounting plate (bracket) by fastening with a plurality of screws from the back side of the mounting plate. However, there is a problem that it is a troublesome work requiring a tool to fasten a plurality of screws from the back side while positioning and mounting the filter head portion at the correct position of the mounting plate. In particular, in a water purifier having a plurality of filters, it was an even greater problem. Then, in view of such a problem, it is a water purifier which has a filter which consists of a filter head part and a filter cartridge, Comprising: The water purifier which can fix a filter head part to the attachment plate for attachment to a wall surface etc. simply It is meaningful to provide

3 is a diagram relating to the filter head unit 4, the filter cartridge 5, and the mounting plate 3 according to an embodiment of the present invention. FIG. 3 (A) is a longitudinal sectional view, FIG. 3 (B) is a front view, and FIG. (C) is a cross-sectional view. In FIG. 3A, for convenience of illustration, the circumferential position of the bayonet mechanism described below is shifted from the original position and is represented in the figure.

As shown in FIG. 3, the filter cartridge 5 is rotated by a bayonet mechanism and is detachably mounted and coupled to the filter head unit 4 to constitute the filter 2. More specifically, at least two bayonet coupling protrusions 19 are provided on the outer periphery of the lid 12 that forms the upper part of the filter cartridge 4 having a columnar outer shape, and the upper portion of the lid 12 including the bayonet coupling projection 19 is The bayonet coupling convex part 19 is inserted into the inner space 38 defined by the outer cylindrical part 36 of the filter head part 4 in the axial direction, and the bayonet coupling concave part 39 provided in the outer cylindrical part 36 of the filter head part 4. The bayonet mechanism is coupled by engaging and rotating. When removing the filter cartridge 5, it is done by rotating it in the opposite direction to the time of coupling. As described above, since the attachment / detachment of the filter cartridge 5 to / from the filter head portion 4 is performed by the bayonet mechanism, the attachment / detachment operation is simple and easy.

The filter head portion 4 is provided with at least one elastically displaceable first convex portion 41 (engagement portion), and at least one second convex portion 24 (covered) on the outer surface of the filter cartridge 5 (of the lid 12). Engagement portion) is provided, and the first convex portion 41 is elastically displaced at the completion stage with the rotation for mounting the filter cartridge 5 to the filter head portion 4, and the second convex portion 24. The first convex portion 41 and the second convex portion 24 are disposed so as to get over. This overcoming (engagement) provides a feeling of mounting the filter cartridge 5 by the bayonet mechanism. In the embodiment shown in FIG. 3, the first convex portion 41 is formed in a circumferential direction formed by a notch 42 provided in the lower outer peripheral edge of the filter head portion 4 and a slit 43 provided in the circumferential direction from the notch 42. It has an extended shape. Of course, the shape of the first convex portion is not limited to this, and a truncated pyramid (or truncated cone, prism, cylinder, hemisphere) shape as shown in FIG. 4 described later is also preferable. The shape of the second convex portion is a prismatic shape in FIG. 3, but may be the same shape as the first convex portion. Moreover, the installation position of the 1st convex part provided in a filter head part may be not the lower outer periphery, but the inner peripheral surface of the outer cylindrical part 36, for example. In that case, of course, the position of the second convex portion is also set to a position corresponding to the first convex portion.

Thus, the mounting feeling of the filter cartridge 5 can be achieved simply and inexpensively by using only two members (in this case, the filter cartridge 5 and the filter head portion 4) without providing any members other than those related to the mounting. Further, the user can surely know the completion of the installation from the feeling of wearing, and can surely carry out the wearing without fail (so as not to leak water). Furthermore, when the first convex portion 41 is on the outer periphery of the lower portion of the filter head portion, the user can visually recognize the first convex portion 41, so that the completion of the mounting can be more reliably confirmed visually with the mounting feeling.

In order to visually confirm the completion of the mounting of the filter cartridge to the filter head part, a mark on the outer surface of the filter cartridge (the second convex part may be used, other protrusion mark or print mark, etc.) And a mark (characters or designs by printing or engraving) provided at an easy-to-see location on the filter head portion at the position when the filter cartridge is completely installed. It is preferable to arrange them so as to collate (or match).

At the same time, a mark (characters or designs by printing or engraving) that signifies removal of the filter cartridge (or start of mounting) is provided at an easy-to-view location on the filter head so that the filter cartridge can be removed (or started of mounting). It is also preferable to arrange the position so as to collate (or match) with the mark on the outer surface of the filter cartridge as the circumferential position. By doing so, it is possible to reliably visually confirm the completion of the removal of the filter cartridge (or the start of mounting).

In the embodiment of FIG. 3, the first convex portion 41 is elastically displaceable, but conversely, there may be a modified embodiment in which the second convex portion is elastically displaceable, and both are elastically displaced. Also good. That is, the engagement part and / or the engagement part can be elastically displaced, and the engagement part and the engagement part are engaged with each other as the filter cartridge 5 is rotated for mounting on the filter head portion 4. In addition, any configuration may be used as long as the elastic displacement state of the elastically displaceable portion changes so that a feeling of mounting the filter cartridge by the bayonet mechanism can be obtained. Therefore, the engaging part and the engaged part may be a modified embodiment of a convex part and a concave part (or a concave part and a convex part) instead of the form of the first convex part and the second convex part. In the case of the form of the convex part and the concave part, the convex part and the concave part are engaged and fitted together with the rotation for mounting the filter cartridge 5 to the filter head part 4, thereby the convex part and / or the concave part. By changing the elastic displacement state of a certain elastically displaceable portion, a feeling of mounting the filter cartridge by the bayonet mechanism can be obtained.

As shown in FIG. 1, in the water purifier 1, a plurality of filters 2 having different filter media housed in the filter cartridge 5 are fixed to the mounting plate 3 and used. In the plurality of filters 2 of the water purifier 1, the positions and / or shapes of the first convex portion 41 and the second convex portion 24 that provide the bayonet mechanism mounting feeling depend on the filter medium stored in the filter cartridge 5. Thus, it is a preferable form that they are different. For example, according to the filter medium accommodated, it can be set as the form from which the up-down direction position in which the 1st convex part 41 and the 2nd convex part 24 which become a pair are provided differs. In addition, for example, for a certain filter medium, the first convex portion having a sharp tip shape and a round and smooth second convex portion are combined. On the other hand, for another filter medium, the first convex portion having a round and smooth tip shape is used. And a sharp second convex portion. With such a shape, the combination of sharp projections other than the correct combination of sharp projections and round and smooth projections cannot be crossed (engaged) with each other, and round and smooth. In the combination of the convex portions, it is possible to make it impossible to get a feeling of wearing because it is too easy to get over each other.

With the above configuration, the position and / or shape of the first convex portion and the second convex portion, even if an incorrect cartridge different from the filter cartridge that should be originally mounted is to be mounted on the filter head portion. Does not correspond to each other well (cannot be properly engaged), and the bayonet mechanism cannot be obtained or the first convex portion and the second convex portion collide with each other and physically depend on the bayonet mechanism. Unable to complete the join. By these phenomena, the user can notice that the filter cartridge to be installed is wrong. In other words, it is possible to prevent erroneous mounting of filter cartridges having different functions, and to securely mount a correctly selected filter cartridge.

As described above, there are a plurality of different embodiments in which the positions and / or shapes of the first convex portion 41 and the second convex portion 24 that provide the bayonet mechanism mounting feeling are different depending on the filter medium housed in the filter cartridge 5. There are a plurality of filter head portions and filter cartridge housings corresponding to the filter types, and a plurality of molds as resin molded products are manufactured. Therefore, the filter head part and the filter cartridge housing itself are of one type, and the first and second convex parts are manufactured as separate bodies, and are retrofitted by welding, screwing, etc., depending on the type of filter and at different positions. It is more preferable to make the embodiment to attach an object of another shape and / or for inexpensive manufacturing.

Of course, in such a water purifier having a plurality of different types of filter cartridges, the wrong mounting of the filter cartridge can be prevented regardless of the structure of the first convex portion and the second convex portion for obtaining the mounting feeling of the bayonet mechanism. Although another key structure can be provided, it is excellent in terms of simplicity and low cost to prevent erroneous mounting by using the structure for obtaining the mounting feeling of the bayonet mechanism as described above.

The mechanism for preventing erroneous mounting of a plurality of different types of filter cartridges, which also has the structure for obtaining the mounting feeling of the bayonet mechanism described above, is similarly applied to the above-described modified embodiment using the convex portion and the concave portion. Can be applied.

In FIG. 3, when the filter cartridge 5 is mounted on the filter head portion 4, the filter cartridge 5 is disposed between the outer peripheral surface of the lid 12 and the inner peripheral surface of the outer cylindrical portion 36 and the inner cylindrical portion 37 of the filter head portion 4. The two seal members (the first seal member 20 and the second seal member 21) are in a liquid-tight connection between the filter cartridge 5 and the filter head portion 4, and raw water (upstream) and purified water (downstream) Liquid-tightness as a flow path is ensured.

A valve 31 is provided in the raw water (upstream) flow path portion communicating with the introduction port 7 of the filter head portion 4 and the upper portion inside the filter head 4. The valve 31 includes a substantially columnar (upper cylindrical) valve body 32, a spring 33 that urges the valve body 32 in the downstream direction, and a valve seal member 34 attached to the valve body 31. The valve body 31 is held such that its upper cylindrical portion engages with the protrusion on the top surface inside the filter head portion 4.

When the filter cartridge 5 is not attached to the filter head portion 4, the urging force of the spring 33 causes the valve seal member 34 to be pressed and contacted toward the peripheral edge of the flow path hole, closing the flow path hole, and the valve 31 to Closed state. On the other hand, when the filter cartridge 5 is attached to the filter head portion 4, the front end portion of the outer surface of the outlet cap receiving portion 18 positioned at the center of the lid 4 of the filter cartridge 5 comes into contact with the valve body, and the urging force of the spring 33. Therefore, the valve body 32 is pushed up to open the flow path, so that the valve 31 is opened. By the mechanism of the valve 31 described above, water can be reliably passed when the filter cartridge 5 is mounted, and when the filter cartridge 5 is not mounted, the valve 31 closes the flow path. When the cartridge 5 is replaced, troubles such as tap water can be prevented.

As can be seen from FIG. 3, when the filter cartridge 5 is attached to the filter head portion 4 and the valve 31 is opened, tap water flows from the inlet 7 of the filter head portion 4 and is opened. And flows in the order of the inlet 22 of the filter cartridge 5, the filter medium 16, the central flow path of the outlet cap 14, the outlet cap receiving portion 18, and the outlet 23, and the outer cylindrical portion 36 and the inner cylindrical portion 37 of the filter head portion 4. To the outlet 8 and flow out.

The structure and configuration for fixing the filter 2 to the mounting plate 3 in the embodiment of FIG. 3 will be described.

The filter 2 is fixed to the mounting plate 3 in such a manner that the filter head portion 4 is mounted and fixed on the mounting plate 3. The mounting plate 3 is provided with an opening 51, and at least one notch 52 (an engaged portion of the protrusion) is provided on the periphery thereof. On the other hand, a protrusion 44 that can be elastically displaced is formed at the lower part of the filter head part 4 (of the outer cylindrical part 36). In the case of FIG. 3, the protrusion 44 is configured to be displaceable radially inward. The number of protrusions 44 is preferably provided in a number corresponding to the notches 52, but may be smaller than the number of notches 52. The filter head portion 4 is placed at a predetermined position on the mounting plate 3 and pressed from above, so that the protrusion 44 is inserted into and engaged with the notch 52 to be fixed. Even when there are a plurality of protrusions 44 and notches 52, the protrusions 44 can be elastically displaced, so that they can be inserted and engaged all at once. Of course, the amount of elastic displacement of the protrusion 44 is set to exceed the manufacturing error of the dimensions and positions of both the protrusion 44 and the notch 52.

This fixing method allows the filter head 4 to be easily fixed to the mounting plate 3 without using another member such as a screw or a tool. In FIG. 3, the engaged portion of the protrusion is a notch 52 on the periphery of the opening 51, so that the filter head portion 4 is also fixed to the mounting plate 3 in the radial direction by the engagement of the protrusion 44.

In addition, by adopting the above-described fixing structure / configuration, the filter heads 4 of the plurality of filters 2 shown in FIG. 3, the assembly and manufacture of the water purifier 1 becomes very easy.

In order to remove the fixed filter head portion 4 from the mounting plate 3, the elastically-displaceable protrusion 44 is artificially pushed and deformed in the displacing direction. If 4 is moved upward and pulled out, it can be removed.

In FIG. 3, the opening 51 of the mounting plate 3 is larger than the outer dimension of the upper portion of the lid 12 of the filter cartridge 5, so the filter cartridge 5 is inserted through the opening 51 after fixing the filter head portion 4 to the mounting plate 3. Thus, it can be easily attached to the filter head portion 4 and can be removed. Therefore, the presence of the mounting plate 3 has no trouble in attaching and detaching the filter cartridge 5.

In the embodiment premised on the presence of the mounting plate as described above, the position on the outer surface of the filter cartridge is compared with the mark on the outer surface of the filter cartridge at the position when the filter cartridge is completely mounted (or removed or started) as described above. The mark to be arranged so as to be (or coincide) may be provided not in a place where the filter head portion is easy to see but in a place where the attachment plate is easy to see (for example, on the outer peripheral edge of the attachment plate).

The mounting plate 3 includes a mounting surface 53 of the filter head unit 4 and a mounting surface 54 to a wall (such as an inner wall of the storage unit at the bottom of the kitchen or a wall in the kitchen room) separate from the water purifier 1. In the side view, the two sides form a T shape. Here, the side view means viewing from a direction perpendicular to a plane perpendicular to the placement surface and the mounting surface. It may be L-shaped instead of T-shaped. The wall mounting surface 54 is provided with a wall mounting hole. With this configuration, the water purifier 1 can be easily attached to the wall under the kitchen sink, the wall of the room, etc., and the assembly time at the site is reduced.

In addition to the projection 44 of the filter head portion 4 described above, a second projection is provided at the lower portion of the outer cylindrical portion 36, and the second projection is engaged with the notch 52 in the circumferential direction. It is good also as fixing of the circumferential direction with respect to the attachment plate 3 of the part 4 is made | formed. In this case, if the circumferential clearance with respect to the notch 52 of the protrusion 44 is larger than the circumferential clearance with respect to the notch 52 of the second protrusion, the circumferential force due to the rotation for attaching and detaching the filter cartridge 5 is surely obtained. Therefore, it is possible to prevent the elastic projections 44 from being applied to the elastically displaceable projections 44, thereby further reducing the risk of breakage.

The above-described elastically displaceable protrusions 44 in FIG. 3 can be displaced in the radial direction, but even in a configuration in which the protrusions can be displaced in the circumferential direction, the protrusions can be formed by simply pressing the filter head portion against the mounting plate. Can be inserted into and engaged with the notch to fix the filter head portion to the mounting plate.

Furthermore, not the notch 52 at the periphery of the opening 51 but the opening 51 itself or a hole (engaged portion of the protrusion) provided on the mounting surface of the mounting plate, the lower part of the filter head part or the outer periphery (near the lower part) The filter head portion can be easily fixed to the mounting plate even in a configuration in which the elastically displaceable protrusion provided on the filter head portion is pressed against the mounting plate.

It is also preferable that a decorative cover can be attached to the mounting plate 3 so that the filter 2 is entirely or partially blindfolded to enhance the aesthetic appearance.

4A and 4B are diagrams relating to the filter head unit 104, the filter cartridge 105, and the mounting plate 103 according to another embodiment of the present invention, which are different from FIG. 3, in which FIG. 4A is a longitudinal sectional view, and FIG. (C) is a cross-sectional view.

As shown in FIG. 4, the filter cartridge 105 is rotated by a bayonet mechanism and is detachably mounted and coupled to the filter head unit 104 to constitute the filter 2. However, in the case of the embodiment of FIG. 4, the bayonet coupling recess 139 differs from the embodiment of FIG. 3 in that the upper part of the recess provided in the lower inner surface of the outer cylindrical part 136 of the filter head part 104 and the mounting plate 103. It is comprised by the lower surface of the recessed part which the mounting surface 153 forms. The bayonet coupling convex portion 119 provided on the outer periphery of the lid 112 constituting the upper portion of the filter cartridge 104 is engaged and rotated with respect to the bayonet coupling concave portion 139, whereby the bayonet mechanism is coupled.

The downward load applied to the bayonet coupling convex portion 119 due to the water pressure generated when water passes through the filter 102 is received by the mounting surface 153 of the mounting plate 103 which is the lower surface of the bayonet coupling concave portion 139. In the case of FIG. 3, the downward load is received by the filter head portion 4. The mounting plate has less restrictions on dimensions and shape for strength reinforcement that can withstand the load, and is easier to reinforce. Therefore, in the model where the load increases, the embodiment of FIG. 4 has the advantage of easier strength design. There is.

In FIG. 4, the configuration for obtaining a feeling of wearing by the bayonet mechanism is slightly different from that in FIG. In the embodiment of FIG. 4, at least one elastically displaceable first convex portion 141 (engaging portion) is provided at the lower portion of the periphery of the opening 151 of the mounting plate 103. The first convex portion 141 is preferably in the shape of a truncated pyramid (or truncated cone, prism, cylinder, hemisphere). At least one second convex portion 124 (engaged portion) provided on the outer surface of the filter cartridge 105 (the shoulder portion of the lid 112) is attached to the filter head portion 104 of the filter cartridge 105. For this reason, the user can get over and engage with the bayonet mechanism at the completion stage of the rotation.

In the embodiment of FIG. 4 as well, the first convex portion 141 is located at the lower portion of the periphery of the opening 151 of the mounting plate 103 and can be visually recognized by the user. Of course, the installation position of the 1st convex part provided in a mounting plate may be in the inner peripheral surface of the opening 151 instead of the lower part of the periphery of the opening 151, for example. In that case, of course, the position of the second convex portion is also set to a position corresponding to the first convex portion.

Similar to the description of the structure of the first convex portion 41 and the second convex portion 24 for obtaining a feeling of mounting the bayonet mechanism of the embodiment of FIG. The positions and / or shapes of the first convex portion 141 and the second convex portion 124 that provide the bayonet mechanism wearing feeling of FIG. 4 differ depending on the filter medium housed in the filter cartridge 105. It is a preferable form. Thereby, the effect of preventing the filter cartridge from being erroneously mounted can be obtained without providing another structure.

The structure and configuration for fixing the filter 102 to the mounting plate 103 in the embodiment of FIG. 4 will be described.

The filter 102 is fixed to the mounting plate 103 in such a manner that the filter head portion 104 is placed on and fixed to the mounting plate 103.

On the mounting surface 153 (upper surface) of the mounting plate 103, an approximately cylindrical upper surface cylindrical portion 162 (engaged portion of the protrusion) is formed around the opening 151 through which the filter cartridge 105 is inserted. Has been. On the other hand, a plurality of vertically striped ribs that are elastically displaceable projections 144 are formed on a part of the outer periphery of the outer cylindrical portion 136 of the filter head portion 104. The inner peripheral shape of the upper cylindrical portion 162 of the mounting plate 103 and the outer peripheral portion (flange-like portion) of the outer cylindrical portion 136 of the filter head portion 104 are substantially the same shape. When the filter head portion 4 is placed on the mounting plate 103 and pressed, the outer periphery of the lower portion of the outer tubular portion 136 is inserted into the upper tubular portion 162, and the elastically displaceable projection 144 is displaced, so that the upper tubular portion is displaced. Engage with and engage with the shaped portion 162. Accordingly, the filter head unit 104 is placed and fixed on the mounting plate 103.

In the embodiment of FIG. 4, the filter head unit 104 and the mounting plate 103 are further coupled by a screw method in order to further fix the filter head unit 104 to the mounting plate 103. More specifically, a screw 161 is inserted through a through hole provided at the periphery of the opening 151 of the mounting plate 103 and screwed into a pilot hole for screwing provided in the filter head unit 104 in advance, thereby completing screw connection. . Strong connection and fixation can be realized by screw type connection.

Instead of screws 161, normal screws and bolts may be screwed into the screw taps because they are cut by the filter head portion 104, and through holes are provided in both the mounting plate 103 and the filter head portion 104, You may couple | bond by screwing with a nut.

By fitting the upper surface cylindrical portion 162 (the engaged portion of the projection) and the elastically displaceable projection 144 by pressing the filter head portion 104 against the mounting plate 103, before screwing (screwing), The filter head portion 104 is fixed to the mounting plate 103 quite tightly, and the filter head portion 104 does not fall off even if the assembly of the filter head portion 104 and the mounting plate 103 is turned upside down for screwing. For this reason, it is easy to perform screwing from the lower surface side of the mounting plate 103.

In order to prevent left-right assembly, the filter head portion 104 is provided with an alignment pin, and the mounting plate 103 is provided with one pin hole for receiving the alignment pin (not shown). The direction of mounting and fixing the filter head portion 104 on the mounting plate 103 is set correctly.

Also in the structure and configuration of fixing the filter head portion 104 to the mounting plate 103, in the water purifier having a plurality of filters (and filter heads) as shown in FIG. 1, the filter heads 104 are connected to each other by piping. After that, the plurality of coupled filter head portions 104 can be pressed together and fixed to the mounting plate 103, and then added and fixed with screws, which makes it very easy to assemble and manufacture the water purifier.

Also in FIG. 4, the opening 151 of the mounting plate 103 is larger than the outer dimension of the upper part of the lid 112 of the filter cartridge 105, so the filter cartridge 105 is inserted through the opening 151 after fixing the filter head 104 to the mounting plate 103. The filter head unit 104 can be attached or detached.

Subsequently, the internal structure and configuration of the filter cartridge 5 in one embodiment of the present invention will be described.

As described in the description of FIG. 1, there are a plurality of types of filter cartridges with different filter media stored therein. However, the basic structure and configuration of the filter cartridge described below are common. Therefore, description will be made using the longitudinal sectional view of the filter cartridge 5 by the adsorption filtration shown in FIG. 5 as a representative.

The filter cartridge 5 has a housing 11 composed of a cylindrical container 13 with a bottom and a lid 12, and a filter medium part 25 accommodated in the housing 11. The filter medium part 25 refers to an internal structure composed of a filter medium 16 and a member that holds the filter medium 16 and allows water to pass therethrough. The filter medium portion 25 has a substantially axial object shape except for its detailed structure. The cylindrical container 13 and the lid 12 are liquid-tightly coupled. As a coupling method, rotational welding, ultrasonic welding, screw coupling, and the like are possible.

The lid 12 is provided with an inlet 22 and an outlet 23 as flow paths. As shown in FIG. 5, an outlet cap receiving portion 18 that is integrally formed as a part of the lid is provided near the center of the upper opening of the lid 12. A part of the outer peripheral portion of the outlet cap receiving portion 18 is integrally connected to the inner surface of the upper opening of the lid 12, and the inside forms an outlet passage as a flow path, and communicates with the outlet passage. An opening provided in a part of the outer surface of the upper opening 12 is an outlet 23. The inlet 22 is an annular portion excluding the outlet cap receiving portion 18 in the upper opening of the lid 12.

An outlet cap 14 is provided as a member on the upper part (downstream side) of the filter medium part 25, and the inside thereof forms a downstream (outlet side) flow path. The outlet cap 14 is fitted into the outlet cap receiving portion 18 and is engaged and fixed in a liquid-tight manner. Eventually, the filter medium part 25 (one end thereof) is liquid-tightly engaged with and fixed to the lid 12. In FIG. 5, a seal member is interposed at the engagement portion between the filter medium portion 25 and the lid 12 to ensure liquid-tight performance, but liquid-tightness can be achieved only by fitting without a seal member. If so, there is no problem.

In the lower part, which is the other end of the filter medium part 25, a concave part 17 at the lower part of the filter medium part is provided, and is engaged with a convex part 15 provided at the bottom of the cylindrical container 13. The relationship between the other end of the filter medium part 25 and the cylindrical container 13 is not such uneven engagement, but the other end of the filter medium part 25 may be merely in contact with and held by the container bottom, or the filter medium part. There may be a gap between the other end of 25 and the bottom of the container. In short, it is only necessary that the other end of the filter medium portion 25 is accommodated in the cylindrical container 13.

In the filter cartridge 5 of FIG. 5, a specific configuration as a filter cartridge by adsorption filtration will be described.

The filter medium 16 is an adsorbent, and typically activated carbon is used. The activated carbon may be any of granular, powdery, and fibrous shapes. Moreover, the thing of the form of the molded object in which those adsorbents were shape | molded may be used. Moreover, ceramic type adsorbents such as zeolite can also be used.

In the embodiment of FIG. 5, the activated carbon 26 that is the filter medium 16 is filled in a cylindrical filter medium storage container, but the shape as the filter medium has a columnar shape in which the axial length is longer than the radial length. . (It can also be configured in a cylindrical shape.) And the direction of the water flow path to the activated carbon flows in from the water flow hole provided in the bottom part (lower part of the filter medium part 25) of the storage container and flows out to the outlet cap 14 It has become a direction. Of course, there may be a form in which the filter medium is cylindrical and water is passed in the radial direction.

As described in the explanation of FIG. 1, the filter 2 having the filter cartridge 5 using the activated carbon 26 as a filter medium is arranged in parallel as a second filter and a third filter. The filter cartridge 5 using the adsorbent (activated carbon) in the axial flow path as shown in FIG. 5 is less likely to cause a short path than the one in the radial flow path, is inexpensive, and can have a small diameter. Therefore, there is an advantage that the pressure resistance strength of the cartridge housing is large. On the other hand, the pressure loss is usually the largest among a plurality of filter cartridges used, and there is a concern that the flow rate as a water purifier is limited by this. Therefore, it is most effective to greatly reduce the pressure loss and increase the flow rate by using the filter cartridge 5 using the activated carbon 26 having the axial flow path as a filter medium in parallel in the water purifier. That is meaningful. In addition, activated carbon, especially granular and powdered activated carbon, generally has a large pressure loss. Therefore, arranging filters with the filter medium in parallel increases the pressure loss as a water purifier regardless of the shape of the filter medium. It has a great effect on reducing and increasing the flow rate.

In addition, the activated carbon portion as a filter medium may include a filter medium (for example, silver-impregnated activated carbon) that contains antibacterial components such as silver (or silver ions), copper (or copper ions), zinc (or zinc ions) in tap water. Good. Moreover, you may include the filter medium (For example, a zeolite, an ion exchange resin, etc.) which removes heavy metals which may be contained in tap water, such as lead.

FIG. 6 shows a longitudinal sectional view of the filter cartridge 5 as a prefilter. This is used for the first filter described in the description of FIG. The basic structure and configuration are the same as those of the filter cartridge shown in FIG. As the filter material for the prefilter, a nonwoven fabric or a resin molded body by melt blow is typically used.

In the embodiment of FIG. 6, the direction of the water flow path of the nonwoven fabric 27 that is the filter medium is the radial direction, unlike the activated carbon of FIG. 5, and the water flow is from the outer peripheral side to the inner peripheral side of the tubular nonwoven fabric. And filtration is performed. Of course, the filter medium as the prefilter is not limited to a resin molded body by nonwoven fabric or melt blow. For example, a mesh filter may be used.

FIG. 7 shows a longitudinal sectional view of the filter cartridge 5 using a filtration membrane. This is used for the fourth filter described in the description of FIG. The basic structure and configuration are the same as those of the filter cartridge shown in FIG. As the filtration membrane, a hollow fiber membrane is typically used. In addition, the filter cartridge can also be configured by using a flat membrane type filter medium.

In the embodiment of FIG. 7, a large number of hollow fiber membranes 28 bent in a U shape are stored in a cylindrical storage container. The end portion of the hollow fiber membrane 28 is potted and fixed to the storage container outlet side with a sealing resin, and is open toward the outlet side (downstream side). Water flowing from a water passage hole provided at the bottom of the storage container is passed from the outside to the inside of the hollow fiber membrane 28 and is filtered by the fine holes of the hollow fiber membrane 28.

The present invention can be used for a water purifier for purifying tap water mainly in general households. In particular, it can be suitably used for an under-sink type water purifier that is installed and used in a storage section at the bottom of a kitchen or a wall-mounted type water purifier that is used by being installed on the wall of a room such as a kitchen or a dining room. .

DESCRIPTION OF SYMBOLS 1: Water purifier 2, 102: Filter 3, 103: Mounting plate 4, 104: Filter head part 5, 105: Filter cartridge 6: Piping 7: Inlet 8: Outlet 9: Raw water inlet 10: Purified water outlet 11 : Housing 12, 112: Lid 13: Cylindrical container 14: Outlet cap 15: Convex part at the bottom of the container 16: Filter medium 17: Concave part at the bottom of the filter medium part 18: Outlet cap receiving part 19, 119: Bayonet coupling convex part 20: First Seal member 21: Second seal member
22: Inlet 23: Outlet 24, 124: 2nd convex part 25: Filter material part 26: Activated carbon 27: Non-woven fabric 28: Hollow fiber membrane 31: Valve 32: Valve body 33: Spring 34: Valve seal member 36, 136: Outer cylinder 37: Inner cylindrical portion 38: Internal space 39, 139: Bayonet coupling recess 41, 141: First protrusion 42: Notch of first protrusion 43: Slit 44 of first protrusion 44, 144: Projection 51 151: Opening 52: Notch 53, 153: Placement surface 54: Mounting surface to the wall 161: Screw 162: Upper cylindrical portion

Claims

A water purifier in which three or more columnar filters having an inlet and an outlet on one end side are arranged in a flow path connecting between a raw water inlet and a purified water outlet, and at least two of the filters are: A water purifier that is arranged in parallel in the flow path and that has a total bending angle of 200 degrees or less in a connection piping path according to one set of the parallel arrangement.
2. The water purifier according to claim 1, wherein the three or more filters are arranged in two rows, and the number of times of bending in the connection piping path relating to one set of the parallel arrangement is two.
The water purifier according to claim 1 or 2, wherein the three or more filters are arranged in two rows, and the two rows are arranged in a staggered manner.
The water purifier according to any one of claims 1 to 3, wherein the connecting piping paths related to the parallel arrangement are paths having the same shape.
The water purifier according to any one of claims 1 to 4, wherein the filters arranged in parallel are the same type of filters.
The water purifier according to claim 5, wherein the filters arranged in parallel have the same pressure loss and filtration performance.
The water purifier according to any one of claims 1 to 6, wherein the filter includes a filter head portion having an inlet and an outlet and a filter cartridge, and the shape of the filter head portion is the same. .
The three or more filters are arranged in two rows, and the respective inlets and outlets of the filters are arranged on a straight line, and the straight line and the central axis of the two-row arranged row are parallel to each other. The water purifier according to any one of claims 1 to 7, wherein:
The water purifier according to any one of claims 1 to 8, wherein each of the plurality of branch pipes related to the parallel arrangement is a single resin molded pipe.
The water purifier according to any one of claims 1 to 9, wherein the plurality of branch pipes according to the parallel arrangement have the same shape.
2. The three or more filters are arranged in two rows, and the distance between the central axes of the two rows arranged in the two rows is smaller than the outer diameter of the filter. The water purifier according to any one of 1 to 10.
The filter medium accommodated in the filters arranged in parallel is an adsorbent configured in a columnar shape or a cylindrical shape whose axial length is longer than the radial length, and the flow path direction in the adsorbent is the axial direction thereof. The water purifier according to any one of claims 1 to 11, wherein the water purifier is provided.
The water purifier according to any one of claims 1 to 12, wherein the filter medium stored in the filters arranged in parallel is activated carbon.