JP2002331287A - Filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter capable of easily detaching a cartridge equipped with a piece or a transparent casing being the constituent part of an indicator from the outside of the main body when trouble occurs in the operation of the piece in the indicator and excellent in maintenance properties. SOLUTION: The filter is equipped with the cartridge 6 housing a filter medium and a changeover switch capable of changing over a water passage and the cartridge 6 is provided with the piece 27 of a pressure receiving body reacted by the flow rate passing through the water passage on the secondary side of the filter medium and the flow rate indicator 26 freely detachable from the outside and comprising the transparent easing 29 covering the piece. When trouble is generated in the operation of the piece 27 in the flow rate indicator 26, the constitutent member of the flow rate indicator 26 can be easily detached from the outside of the main body to easily improve the trouble.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter having a built-in filter medium for filtering tap water and having a cartridge provided with an indicator for notifying the clogging.

[0002]

2. Description of the Related Art In recent years, with the deterioration of tap water quality, consumers have been interested in drinking water, and filters for purifying tap water have become widespread. In addition, it is desired to reduce the size and weight of a change-over switch of a direct-connection type water purifier, a stationary water purifier, and a water conditioner that is directly connected to a faucet so as not to interfere with kitchen work.

[0003] In the water purifier of the faucet direct connection type described below as a conventional technique, a changeover switch for switching a water passage according to a use and a cartridge containing a filter medium for filtering tap water are connected. An indicator for notifying the clogging of the filter medium is provided in a part, and the manner of movement of the indicator changes according to a change in the flow rate of water due to the clogging state of the filter medium. It is possible to detect that the filter medium is clogged by the manner of movement of the indicator, and to notify the user of the clogging of the filter medium.

[0004] A conventional faucet direct connection type water purifier will be described. FIG. 7 is an external view of a conventional filter water purifier, FIG. 8 (a) is a cross-sectional view of the conventional filter, and FIG. 8 (b) is a longitudinal sectional view of the conventional filter.

[0005] As shown in FIG. 7, the water purifier main body is connected to a faucet 1 by a joint 2 and fixed by a nut 3. The water purifier main body has an outer shell composed of an upper cover 4 and a lower cover 5, and a cartridge 6 in which a filter medium for filtering tap water is incorporated is detachably provided. Further, the water purifier main body is provided with a raw water straight discharge port and a raw water shower discharge port for discharging tap water as it is, and a purified water discharge port 9 for discharging tap water by filtering it with a cartridge 6. Further, a switching lever 10 is provided, which is connected in conjunction with a changeover switch for switching a water passage, and externally switches between a raw water straight, a raw water shower, and purified water according to the application. 26 in the figure
Is a flow checker.

Here, the flow of water will be briefly described. When the switching lever 10 is at the position where the raw water straight water is discharged, the water flows from A to F, and when the switching lever 10 is at the position where the raw water shower is discharged, A to G. When it is in the position where the clean water is discharged, the flow flows in the order of A → B → C → D → E.

Next, the internal structure will be described in detail. FIG.
1A and 1B, the changeover switch 19 is constituted by a combination of the following members. Reference numeral 11 denotes a changeover switch housing. The changeover switch housing 11 has a water supply port 11a, and the valve seat 1 is provided below the water supply port 11a.
A water purification side water supply port 11aa having 1d, a raw water straight water supply port 11ab, and a raw water shower water supply port 11ac are arranged in a straight line, and the water purification side outflow port 11ba is located in a direction perpendicular to the water supply port 11a.
b, The raw water shower outlet 11bc is disposed further below the raw water straight water supply port 11ab and the raw water shower water supply port 11ac, and has a cylindrical shape as a passage orthogonal to the passage connected to the water supply port 11a and the raw water straight water outlet 11bb. A passage 11c is provided. Numeral 12 denotes a rotary valve stem which is fitted into the cylindrical passage 11c. The rotary valve rod 12 has a water channel groove 12b corresponding to each of the purified water supply port 11aa, the raw water straight water supply port 11ab, and the raw water shower water supply port 11ac, and a projection cam 12a is provided in the water path groove 12b. Reference numeral 13 denotes a synthetic rubber O-ring for separating the respective water channel grooves 12b. Reference numeral 14 denotes a filter for removing dust and the like contained in tap water flowing into the changeover switch housing 11, and has a large number of filter holes. Reference numeral 15 denotes a synthetic rubber D-ring, which is attached to the valve body 16. The number of the valve bodies 16 is used in accordance with the water supply ports of the plurality of water passages. In this example, three modes are used because the raw water straight, the raw water shower, and the purified water are in three modes. Also, the cross rib 1 provided below the valve body 16
6a is a water supply port 11 on the purified water side of the changeover switch housing 11.
aa, a raw water straight water supply port 11ab, and a raw water shower water supply port 11ac, respectively, and a biasing spring 17 for ensuring a sealing property is attached to a support shaft 11b provided above the valve body 16, and these are attached. It is inserted into a support hole 18a of a receiving plate 18 provided for fixing. The receiving plate 18 is provided with a screw 23
It is fixed at. Reference numeral 20 denotes a connecting pipe, and the switching lever 1
When 0 is selected for the water purification mode, a water passage for guiding tap water to the cartridge 6 is formed.

The operation of the changeover switch 19 will now be described. The valve element 16 is placed at a position aligned with each water channel groove 12 b of the rotary valve stem 12, and by rotating the switching lever 10, the rotary valve stem 1 joined to the switching lever 10 is rotated.
2 also rotates, and the projection cam 12a comes into contact with the valve body 16 and is pushed upward on the water supply port 11a side, and the purified water supply port 11a.
a, the raw water straight water supply port 11ab and the raw water shower water supply port 11ac are opened. The projecting cams 12a are provided at different angles in the respective water channel grooves 12b of the rotary valve rod 12, so that the rotary valve rod 12 is rotated to separate the valve bodies 16 provided at the respective water supply ports. Can be pushed up and released. If the angles are the same, two or more valve bodies 16 can be simultaneously pushed up and opened. Further, the channel groove 12b has a connecting pipe 20 on the left side.
When the rotary valve rod 12 is rotated by the switching lever 10, since the middle and right two are in communication with the raw water straight outflow and the raw water shower outflow, respectively, The valve element 16 with the cross ribs comes into contact with the projection cam 12a, so that the purified water supply port 11aa, the raw water straight water supply port 11ab, and the raw water shower water supply port 11ac.
Is opened, and through any of the channel grooves 12b,
It is connected to any of the purified water outlet 11ba, the raw water straight outlet, and the raw water shower outlet.

Next, the cartridge 6 detachably connected by the screw structure provided on the connecting pipe 20 of the main body will be briefly described. Inside the cartridge 6, a first partition plate 24 in which a filter is inserted in order in the flow direction of water, a nonwoven fabric 30, an activated carbon layer 21, and a second partition plate 25 in which a filter is inserted are arranged on the outer peripheral side. The hollow fiber membrane 22 is arranged on the inner peripheral side. In addition, an indicator 26 for notifying the clogging of the hollow fiber membrane 22 to the outside is provided on the secondary side of the cartridge 6 on the filter body side. The indicator 26 is a pressure receiving body (coma) that receives the discharge pressure of the purified water discharged from the cartridge 6.
27, and a spring 28 for urging the pressure receiving body 27 from the opposite side with respect to the flow direction of the water. The spring 28 is covered with a transparent casing 29 to check the operation of the pressure receiving body (top) 27 from outside. .

[0010] Here, a brief description will be given of a route until the clean water, the raw water straight, and the raw water shower are discharged. When the switching lever 10 is in the water purification mode, one valve element 1
6 is opened from the purified water supply port 11aa, and at this time, the other cross ribbed valve element 16 is moved by the biasing spring 17 into the raw water straight water supply port 11ab and the raw water shower water supply port 1ab.
1ac is closed. Tap water flowing from the faucet 1 passes through the joint 2 and flows into the purified water supply port 11aa.
6, passes through the water channel groove 12 b of the rotary valve rod 12, flows into the purified water outflow port 11 ba, flows into the connecting pipe 20, and the first partition plate 24 provided on the outer peripheral side of the cartridge 6, the nonwoven fabric 30 , Through the activated carbon layer 21 and the second partition plate 25 in order to remove impurities and free residual chlorine, etc., and then invert at the end of the cartridge 6 and flow into the hollow fiber membrane 22, causing fine turbidity. Purified water from which general bacteria, etc. have been removed,
After the flow rate is confirmed by the flow rate checker 26, the water is discharged from the purified water discharge port 9. Next, when the switching lever 10 is positioned in the raw water straight mode, one valve body 16 is opened from the raw water straight water supply port 11ab, and at this time, the other valve body 16 is supplied with water by the biasing spring 17 on the water purification side. The port 11aa and the raw water shower water supply port 11ac are closed. The tap water flowing from the faucet 1 passes through the joint 2, flows into the raw water straight water supply port 11ab, passes through the water channel groove 12b of the rotary valve rod 12 while being guided by the valve body 16, and flows out from the raw water straight outlet 11ba. Then, after flowing into a raw water straight chamber (not shown) provided with a plurality of straightening networks (not shown), the raw water is straightened and discharged from a raw water straight discharge port (not shown) of the lower cover 5.

Next, when the switching lever 10 is in the raw water shower mode, one valve body 16 is open from the raw water shower water supply port 11ac, and at this time, the other valve element 16 with a cross rib is biased. The spring 17 closes the purified water supply port 11aa and the raw water straight water supply port 11ab. The tap water flowing from the faucet 1 passes through the joint 2, flows into the raw water shower water supply port 11ac, passes through the water channel groove 12b of the rotary valve rod 12 while being guided by the valve body 16, and flows out from the raw water shower outlet 11bb. Raw water shower room (not shown) provided with many shower holes (not shown)
, And is discharged in a shower state from a raw water shower discharge port (not shown).

[0012]

In the conventional water purifier, since the top 27 of the indicator 26 for notifying the clogging of the filter medium is built in the main body of the filter, the top 27 is actuated by a hook or the like. When a problem occurs, the main body must be disassembled, resulting in a loss of disassembly time and, in some cases, the disposal of parts.

Accordingly, the present invention solves the above-described conventional problems. When a malfunction occurs in the operation of the indicator in the indicator, the cartridge having the indicator, the transparent casing, and the indicator can be easily provided. It is an object of the present invention to provide a filter which can be attached and detached from the outside of the main body and has excellent maintainability.

[0014]

SUMMARY OF THE INVENTION To achieve the above object, the present invention provides a filter provided with a changeover switch capable of switching between a cartridge containing a filter medium and a water passage. And a filter provided with an indicator made of a pressure-receiving body that reacts by the flow rate passing through the secondary-side water passage and a transparent casing that is detachable from the outside and covers the piece.

According to the present invention, when a problem occurs in the operation of the frame in the indicator, the component of the indicator can be easily attached and detached from the outside of the main body, and the problem can be solved.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is a filter comprising a cartridge containing a filter medium for filtering impurities in tap water and a changeover switch for switching a water passage. A flow rate checker is constituted by a pressure receiving body piece which reacts according to a flow rate of the filter medium contained in the cartridge in the secondary side water passage and a transparent casing covering the piece, and the transparent casing is externally attached to the fitting portion of the cartridge. It is a filter that can be detached from the filter, and can be easily attached and detached when a problem occurs in operation due to a trapped top, etc., so that operation problems can be eliminated, and excellent maintenance can be achieved. Further, since the frame is provided in the cartridge section, it can be replaced together when the cartridge is replaced, and has an effect of improving hygiene.

According to a second aspect of the present invention, in the filter according to the first aspect, the transparent casing has at least one claw formed on a cylinder and extending in a direction parallel to the insertion direction. Since the transparent casing can be prevented from coming off and screws and the like are not used, it has an effect that the assembling property and the maintenance property can be improved.

According to a third aspect of the present invention, in the filter according to the first or second aspect, a transparent casing is provided.
After inserting it into the mating part of the cartridge, rotate it to
It is designed to be fixed, and has the effect of being capable of being excellent in assemblability and maintainability.

The fourth aspect of the present invention is the first aspect.
In the filter according to any one of Items 1 to 3, the transparent casing has a guide rib extending in a direction in which the top is movable inside, so that the top can move smoothly.
This has the effect that the stability and reliability of the operation of the top can be enhanced.

The invention according to claim 5 of the present invention is the invention according to claim 1.
In the filter according to any one of Items 1 to 4, the transparent casing also serves as a purified water discharge port, and further has a rib in a direction in which filtered water flows out inside the discharge port, so that the flow of filtered water can be rectified. It has the effect of making the flow of filtered water easy for the user to use.

Hereinafter, the filter of the present invention will be described in detail with reference to the drawings.

(Embodiment 1) FIG. 1 is a perspective view showing the appearance of a filter according to Embodiment 1 of the present invention, FIG. 2 (a) is a cross-sectional view of the filter, and FIG. Longitudinal sectional view of the filter, FIG. 3
Is a longitudinal sectional view of a cartridge of the filter, FIG. 4 is a side, top, and bottom view showing an appearance of an indicator pipe of the filter, and FIG. FIG. 5 (b) is an insertion state diagram of the indicator, FIG.
FIG. 6A is a cross-sectional view of the indicator pipe of the filter, and FIG. 6B is a cross-sectional view of the indicator pipe. In Embodiment 1 described below, members corresponding to those of the water purifier described in the related art are denoted by the same reference numerals as those in the related art, and redundant description will be omitted.

1 to 6, reference numeral 1 denotes a faucet, 2 denotes a joint,
3 is a nut, 4 is an upper cover, 5 is a lower cover, 6 is a cartridge, 9 is a purified water discharge port, 10 switching lever, 11 is a switch housing, 11a is a water supply port, 11aa is a purified water supply port, and 11ab is a raw water straight water supply. Mouth, 11ac is raw water shower water inlet, 11ad is raw water water inlet, 11ba
Is a clean water outlet, 11bb is a raw water straight outlet, 11
bc is a raw water shower outlet, 11bd is a raw water outlet, 1
1c is a cylindrical passage, 11d is a valve seat, 12 is a rotary valve stem, 1
2a is a projection cam, 12b is a channel groove, 12c is a rib, 13
Is an O-ring, 14 is a filter, 15 is a D-ring, 16
Is a valve body, 16a is a cross rib, 16b is a support shaft, 16c is a cylindrical receiving portion, 17 is a biasing spring, 18 is a receiving plate, 18a is a support hole, 19 is a changeover switch, 20 is a connection pipe, and 21 is activated carbon. Layer, 22 is a hollow fiber membrane, 23 is a screw, 24 is a first partition plate, and 25 is a second partition plate. In addition, these members are the same as the members of the water purifier described in the related art,
Therefore, the same reference numerals as those in the related art are given the same reference numerals, and redundant description is omitted here.

In a filter comprising these members,
When the operation lever 10 is in the raw water mode, water flows from A to F, and when the operation lever 10 is in the water purification mode, water flows from A to F.
Flows from B, C, D, and E. In the following description of the filter, there are two modes of purified water and raw water, but a plurality of modes may be used.

First, the flow of tap water inside the filter will be described. Tap water flows into the purified water supply port 11aa and the raw water supply port 11ad from the water supply port 11a, respectively, and the tap water is selectively switched to either the purified water outlet 11ba or the raw water outlet 11bd.

In the case of the water purification mode, tap water flows into the changeover switch 19, flows into the purified water supply port 11aa, flows into the cartridge 6 containing a detachable filter medium from the purified water outlet 11ba through the water channel groove 12b. Then, it passes through the nonwoven fabric 30 provided on the outer peripheral side, the first partition plate 24, the activated carbon layer 21, the nonwoven fabric 30, and the second partition plate 25 in this order, where impurities and free residual chlorine and the like are removed. The water that has been turned over at the end and flows into the hollow fiber membrane 22 provided on the inner peripheral side, and the fine turbidity and the purified water that has been filtered of general bacteria, etc., is supplied to the hollow fiber provided in the secondary-side water purification channel of the cartridge 6. Membrane 22
Is discharged from the purified water discharge port 9 via a flow rate checker 26 for notifying the clogging to the outside.

In the raw water mode, tap water flows into the changeover switch 19, flows into the raw water supply port 11ad, flows out from the raw water outlet 11bd through the water channel groove 12b, and is discharged as it is as raw water.

The present invention is characterized by the flow checker 26 in the filter, and its structure will be described in detail below.

The flow rate checker 26 is provided in the cartridge 6, and urges the pressure receiving body 27 from the opposite side to the flow direction of the water and the top 27 of the pressure receiving body which receives the discharge pressure of the purified water discharged from the cartridge 6. Spring 28,
In order to confirm the operation of the top 27 of the pressure receiving body from the outside, it is constituted by a cylindrical transparent casing 29 covering the top 27. The transparent casing 29 has a structure that is detachable from the cartridge 6 from the outside.

According to this structure, when the top 27 of the pressure receiving body has a problem in operation due to a hook or the like, the transparent casing 29 can be easily attached / detached, so that the problem of the operation of the top 27 can be eliminated and the maintenance property is excellent. Can be something. In addition, the top 27 is
In this case, the cartridge 6 can be replaced when the cartridge 6 is replaced, and the sanitary condition can be improved.

A more detailed configuration will be described. In the cartridge 6, the holes 6a and 6b having different widths are connected to each other at the bottom of the fitting portion with the transparent casing 29, and the width of the holes has a relationship of 6a> 6b (FIG. 5).
(A)). Further, the tip of the transparent casing 29 is provided with a claw 2 for fitting the hole 6 a and the hole 6 b of the cartridge 6.
9a, the hook 29a is formed integrally with a hook 29a and a guide 29ab having different widths, and the hook 29aa and the guide 29
The width of ab is in a relationship of 29aa> 29ab (see FIGS. 4 and 6A).

Here, when inserting the transparent casing 29 into the fitting portion of the cartridge 9, first,
9aa is inserted into the hole 6a, and then the transparent casing 29 is rotated. At the time of the rotation, the guide portion claw 29 of the claw 29a
ab is guided to the hole 6b, and the relationship between the width of the hook 29a and the width of the hole 6b is determined by the hook 29aa> the hole 6b.
Therefore, the claw 29a is stuck in the hole 6b. As a result, the transparent casing 29 can be prevented from coming off, and since it is inserted into the cartridge 6 and then rotated and mounted and fixed, screws and the like are not used, so that the assembling property and the maintenance property are excellent. Can be. Further, since the guide ribs 29b and 29c extending in the direction in which the top 27 can move are provided inside the transparent casing 29 (see FIG. 6), the top 27 can move smoothly, and there is a problem such as catching. Can be eliminated. The transparent casing 29 has not only a part of the flow rate checker 26 but also a purified water discharge port, and is a part that greatly affects the flow (rectification) of filtered water.
Therefore, a rib is provided in the direction in which the filtered water flows out inside the outlet of the filtered water. With this structure, the flow of the filtered water can be rectified, and the flow of the filtered water that is easy for the user to use can be provided. .

[0033]

As is apparent from the above description, the present invention provides a cartridge serving as a flow rate checker in a cartridge part of a filter, and a transparent casing which covers the top and which is detachable so that the top can be caught. When a trouble occurs in the operation, the top is easily attached and detached together with the transparent casing, and the top is exchanged together with the cartridge, so that a maintenance-friendly and sanitary filter can be provided.

Further, after the transparent casing is provided with claws and the transparent casing is inserted into the cartridge, the transparent casing is rotated and the claws are hooked and fixed, thereby preventing the transparent casing from coming off. Furthermore, since the top extends in the direction in which the top moves in the transparent casing and the rib is provided in the direction in which the filtered water flows, the top can move smoothly, and the flow of the effluent can be further improved. It is possible and the effect is great.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an appearance of a filter according to a first embodiment of the present invention.

FIG. 2A is a cross-sectional view of the filter. FIG. 2B is a longitudinal cross-sectional view of the filter.

FIG. 3 is a longitudinal sectional view of a cartridge of the filter.

FIG. 4 is a side, top, and bottom view showing the appearance of an indicator pipe of the filter.

FIG. 5 (a) is an external view of a mating part to which the indicator pipe is fitted. (B) is an inserted state diagram of the indicator. (C) is a completed state diagram of the indicator.

FIG. 6A is a cross-sectional view of the indicator pipe of the filter. FIG. 6B is a cross-sectional view of the indicator pipe.

FIG. 7 is a perspective view of a conventional filter.

8A is a cross-sectional view of a conventional filter. FIG. 8B is a vertical cross-sectional view of a conventional filter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Faucet 6 Cartridge 6a Transparent casing mounting hole a 6b Transparent casing mounting hole b 9 Purified water discharge port 10 Switching lever 11 Switching switch housing 16 Valve element 19 Switching switch 20 Connecting pipe 26 Flow rate checker 27 Pressure receiving body (top) 28 Energizing spring 29 Transparent casing 29a Claw 29aa Hook part claw 29ab Guide part claw 29b Guide rib 29c Rib

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor E ▲ Zaki ▼ Yasuhiko 1006 Odakadoma, Kadoma City, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. Company F term (reference) 2D060 CD09 4D024 AA02 AB01 AB11 BA02 BB01 BC01 CA04 CA05 CA13 DA04 DB03 DB05

Claims (5)

[Claims] 1. A filter comprising a cartridge containing a filter medium for filtering impurities in tap water and a changeover switch for switching a water passage, wherein a secondary side of the filter medium contained in the cartridge is provided. A flow rate checker is constituted by a pressure receiving member top that reacts according to a flow rate passing through the water passage and a transparent casing that covers the top, and the transparent casing is detachably attached to a fitting portion of the cartridge from outside. Filter. 2. The filter according to claim 1, wherein the transparent casing has at least one claw formed on a cylinder and extending in a direction parallel to the insertion direction. 3. The filter according to claim 1, wherein, after the transparent casing is inserted into the fitting portion of the cartridge, the transparent casing is rotated to be mounted and fixed. 4. The filter according to claim 1, wherein the transparent casing has a guide rib extending in a direction in which the top is movable. 5. The filter according to claim 1, wherein the transparent casing also has a purified water discharge port, and further has a rib inside the discharge port in a direction in which filtered water flows out.