JPH0677654B2 - Filter - Google Patents

Description

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

2. Description of the Related Art In this type of filter, there is one that uses, as a filter medium, for example, a hollow fiber membrane formed by bundling hollow fibers having innumerable micropores. This is to remove turbid components such as iron rust in raw water when the raw water passes through the micropores. However, when it is used for a long time, the turbid component is accumulated on the surface of the hollow fiber and the filtration performance is deteriorated. In such cases,
It can be used again by passing water in the opposite direction to remove the turbid component accumulated on the surface of the hollow fiber, that is, by backwashing.

As a structure that can be backwashed, for example, there is one as shown in FIG. 45 is a water supply pipe connected to the main body 46. Reference numeral 47 is a cartridge having a filter medium enclosed therein, and has an inflow port 47a at one end and an outflow port 47b at the other end. Reference numeral 48 is a hollow fiber that is folded with the ends aligned and is housed in a cartridge 47 as a filter medium, and 49 is a synthetic resin that fixes the ends of the hollow fibers 48. 50 is a lid for sealing the inside of the main body 46. Reference numeral 51 is a filtered water discharge pipe provided on the lid 50. Reference numeral 52 is a joint portion into which the outlet 47b of the cartridge 47 is fitted.

In the case of such a configuration, when switching to the backwashing state, first, the lid 50 was opened, the cartridge 47 was taken out, turned over, and stored again in the main body 46. However, bothering to take out the cartridge 47 and flip it over,
I paid it inside. However, it is very inconvenient for the user to take out the cartridge 47 and invert it.

On the other hand, in order to eliminate such inconvenience, there is a valve provided internally with a switching valve for switching a water channel. This switching valve allows water to pass through the cartridge in the forward direction during filtration.
When backwashing, it is configured to pass in the opposite direction. in this case,
The user uses the switching lever to switch the water channel between filtration and backwash.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above configuration, the filtered water and the reverse normal water are discharged from the same outlet, so that the user may mistake the filtered water and the reverse normal water. . For example, in the former case, in the configuration in which the cartridge 47 is taken out and inverted during the backwashing, the backwashing water is discharged from the filtered water discharge pipe 51 during the backwashing as in the case of the normal filtration, and is not supplied from the outside. It was not possible to tell that it was backwashed. On the other hand, in the latter type which has a switching valve,
During the backwashing, the position of the switching lever indicates that the backwashing state is set. However, a person who does not even know that the filter has a backwash state does not pay attention to the position of the switching lever. Therefore, even if the position of the switching lever indicates the backwash state, there is a risk that the backwash water is used without noticing it.

The present invention has been made in view of the above problems, it is possible to distinguish the filtration state and the backwash state at a glance,
And it aims at providing the filter which can prevent using backwash water accidentally.

Means for Solving the Problems In order to solve the above problems, the present invention provides a valve that switches between a water channel in a normal filtration state and a water channel in a backwash state, and rotates a water discharge pipe protruding to the outside. The water discharge pipe and the valve body of the valve are connected to each other so that the water passage in the filtration state and the water passage in the backwash state are switched with the rotation of the water discharge pipe.

Operation With the above configuration, the water discharge pipe will always be displaced to a position other than during normal use in the backwash state, and the user can distinguish the filtration state and the backwash state at a glance. I can. In addition, the water channel is switched by rotating the water discharge tube, and when the water discharge tube is in the position for normal use, the water channel is always in the filtration state. Filtered water will always be discharged from the pipe.

Embodiment Hereinafter, an embodiment of the present invention shown in FIG. 1 will be described with reference to FIGS. 1, 2, 3, and 4. However, FIG. 1 shows the second
It is sectional drawing when it cut | disconnects along the line DD 'shown by a figure. Reference numeral 1 is a filter body provided with a water supply pipe 2 and a filtered water discharge pipe 3. Reference numeral 4 denotes a cartridge having a hollow fiber 48 therein, which is the same as that shown in the conventional example of FIG. Reference numeral 5 is a cover for accommodating the cartridge 4 and fixing it to the main body 1. A joint portion 6 is provided on the main body 1 and is connected to the filtered water outlet 4a of the cartridge 4. 7 is a water channel provided on the side of the cover 5, and 8 is a water channel 7.
Is a joint portion that is provided at the end of the cartridge 4 and connects the filtered water outlet 4b of the cartridge 4 and the water channel 7.

A cylindrical valve casing 9 is formed on the main body 1,
A cylindrical valve body 10 is rotatably accommodated in the valve casing 9. On one side of the valve body 10, the shaft portion is integrally formed with the valve body 10.
11 are formed. A water channel 12 is formed in the central portion of the valve body 10 and the shaft portion 11 along the central axis.

The filtered water discharge pipe 3 is attached to the outer end of the shaft portion 11 so as to be connected to the water channel 12. Further, the filtered water discharge pipe 3 is a valve body 10.
The shaft 11 and the valve body 10 are bent in an L shape with respect to the rotation axis of the shaft 11 and the filtered water discharge pipe 3 is rotated in the direction of arrow A as shown in FIG. Will rotate.

On the side of the valve body 10, there is provided a recess 13 for forming a flowing water channel between the inner wall of the valve casing 9 and a similar recess 14 at a position adjacent to the recess 13 along the circumferential direction. Has been. Reference numeral 15 is a partition wall portion between the recess 13 and the recess 14. Further, the valve body 10 is provided with a water flow hole 16 penetrating from the side surface to the internal water passage 12.

On the other hand, the main body 1 is provided with a water channel 17, a water channel 18, a discharge channel 19, and a water channel 20. One end of each of the water channel 17, the water channel 18, the discharge channel 19, and the water channel 20 is connected to a side portion of the valve casing 9. The other end of the water channel 17 is connected to the water supply pipe 2 below the main body 1. The other end of the water channel 18 is directed to the cover 5 side and is connected to the water channel 7 provided in the cover 5. The other end of the discharge path 19 is open to the outside as it is, and the backwash water is discharged to the outside from the opening during backwashing. The other end of the water channel 20 is connected to the outlet 4a of the cartridge 4.

Further, the inner wall surface of the valve casing 9 is provided with a recess 21 that forms a flowing water channel between the inner wall surface of the valve casing 9 and the outer wall of the valve body 10. Inflow hole
16 is always arranged so as to face the concave portion 21,
The water that has entered the inside flows into the inflow hole 16.

In the filter constructed as described above, the filtered water discharge pipe 3 is tilted to the position B at the time of normal use as shown in FIG. When the filtered water discharge pipe 3 is at the position B, the position of the valve body 10 is as shown in FIG. In this state, the raw water that has entered from the water supply pipe 2 has a water channel 17, a recess 13, and a water channel 1.
8. After passing through the water channel 7, it enters the cartridge 4 through the water flow port 4b. Then, it is filtered in the cartridge 4 and flows out from the outlet 4a as filtered water. The filtered water flowing out from the outflow port 4a flows into the recess 21 via the water channel 20 and the recess 14. Recess 21
The filtered water that has flowed into the valve flows into the valve body 10 through the inflow hole 16, then flows into the filtered water discharge pipe 3 through the flowing water passage 12, and is discharged to the outside.

Next, the back washing will be described. During backwashing, the filtered water discharge pipe 3 is erected by the user and placed at the position C shown in FIG. At the position C, the position of the valve body 10 is as shown in FIG. In this state, the raw water that has entered from the water supply pipe 2 flows into the recess 14 of the valve body 10 via the water channel 17. Then, it flows into the water channel 20 through the recess 14 and enters the cartridge 4 through the outlet 4a. The raw water that has entered through the outflow port 4a flows in the cartridge 4 in the direction opposite to that during filtration.

When water flows in the cartridge 4 in the direction opposite to that in the filtration, the turbid component such as iron rust adhered to the filter medium in the cartridge 4 begins to dissolve in the water. Then, the water in which the turbid component is dissolved, that is, the backwash water flows out of the cartridge 4 through the inflow port 4b.

The backwash water flowing out from the inflow port 4b flows into the recess 13 of the valve body 10 through the water channel 7 and the water channel 18, further flows into the water channel 19 from the recess 13, and is discharged from the backwash water discharge port 22 in the lower portion of the main body 1.

Next, a second embodiment of the filter according to the present invention will be described. In FIG. 5, reference numeral 23 denotes a main body, which is provided with a pipe fitting 24 on the upper part thereof, and is connected to the faucet pipe 25 by the pipe fitting 24. Reference numeral 26 is a discharge pipe, which is rotatably attached like the filtered water discharge pipe 3 in the first embodiment. A cover 27 is provided on the side of the main body 23 and covers the discharge pipe 26. A pipe portion 28 for guiding backwash water is formed in the lower portion of the cover 27. When the discharge pipe 26 is pushed downward, the discharge port portion 26a of the discharge pipe 26 is accommodated in the front face side opening portion 28a of the pipe portion 28. Then, the water discharged from the discharge pipe 26 flows through the pipe portion 28, is guided to the rear portion of the filter, and the pipe portion 28
The liquid is discharged to the outside from a discharge port 28b provided in the rear part.

6 is a longitudinal sectional view, and FIG. 7 is a line E shown in FIG.
It is sectional drawing cut | disconnected along -E '. A valve casing 30 is formed in the main body 1, and a valve body 31 is formed in the valve casing 30.
Is housed. 32 is a water channel for guiding raw water flowing from the faucet pipe 25, and 33 and 34 are water channels for flowing water into the cartridge 4, which are formed in the main body 23, respectively.

Then, one ends of the water channels 32, 33, 34 are connected to the side portions of the valve casing 30. Reference numeral 35 is a recess formed on the side of the valve casing 30. On the other hand, a recess 36 and a recess are provided on the side of the valve body 31.
37 is formed, and an inflow hole 38 for pouring water into a water passage 42 in the valve body 31 is further provided. Reference numeral 39 is a cover for accommodating the cartridge 4 and attaching it to the main body 23. Reference numeral 40 denotes a water passage provided on a side portion of the cover 39 for allowing water to pass through the cartridge 4. Reference numeral 41 is a shaft portion formed integrally with the valve body 31, and a flowing water passage 42 is formed inside. A root portion of the discharge pipe 26 is connected to an outer end portion of the shaft portion 41.

In the filtration state of this filter, as shown in FIG.
26 is placed in the D position. In this case, the position of the valve body 31 is as shown in FIG. 6 and FIG.
7, waterway 33, waterway 40, cartridge 4, waterway 34, recess 36, recess
A water passage is formed which passes through 35, the inflow hole 38, the water passage 42, and the discharge pipe 26. Then, the raw water flowing in from the faucet pipe 25 flows through this path, is filtered by the hollow fiber membrane in the cartridge 4, and is discharged from the discharge port of the discharge pipe 26.

Next, the time of backwashing will be described. During backwashing, the discharge pipe 26 is rotated by the operation of the user and is stored in the position E shown in FIG. In this case, as described above, the discharge port portion 26a of the discharge pipe 26 is inserted into the mouth portion 28a of the pipe portion 28.

The position of the valve body 31 is as shown in FIGS. 8 and 9, and the water passage 32, the recess 36, the water passage 34, the cartridge 4, the water passage 40, the water passage 33, the recess 37, the recess 35, the inflow hole 38. , Waterway 42, discharge pipe
A waterway through 26 is formed. However, FIG. 8 is a longitudinal sectional view in the backwash state, and FIG. 9 is a line F shown in FIG.
It is sectional drawing cut | disconnected along -F '. The raw water flowing from the faucet pipe 25 flows through this path, backwashes the hollow fiber membrane in the cartridge 4, and flows into the discharge pipe 26. The backwash water that has flowed into the discharge pipe 26 flows into the pipe portion 28, is guided to the rear of the filter, and is discharged to the outside through the discharge port 28b.

In the second embodiment described above, the backwash water flows out through the same discharge pipe 26 as the filtration, but since it is guided to the rear by the pipe portion 28 newly provided outside, the user There is very little risk of accidentally using backwash water.

Further, the inside of the pipe portion 28 through which the backwash water passes is apt to become dirty due to dust and the like in the backwash water, but when the discharge pipe 26 is separated from the pipe portion 28, the mouth portion 28a faces the front. , Mouth 28a
Therefore, the inside of the pipe portion 28 can be cleaned by easily inserting a cleaning tool.

As described above, according to the present invention, the water discharge pipe protruding to the outside is rotatably attached, and the water discharge pipe and the valve body of the valve for switching the water passage are connected to each other so that the water discharge pipe By configuring so that the water channel in the filtration state and the water channel in the backwash state are switched along with the rotation, the water discharge pipe is always displaced to a position other than during normal use in the backwash state, The user can easily distinguish the filtered state and the backwashed state at a glance. In addition, the switching of the water channel is performed by the rotation of the water discharge tube, and when the water discharge tube is in the position for normal use, the water channel is always in the filtration state,
As long as the water discharge pipe is in the normal position, filtered water will always be discharged from the filtered water discharge pipe, and even if the user does not know about backwashing the filter, accidentally use unclean backwash water. There is no.

As described above, the present invention provides a filter which is very easy for the user to use.

[Brief description of drawings]

FIG. 1 is a horizontal cross-sectional view of the filter according to the first embodiment of the present invention in a filtration state, FIG. 2 is a vertical cross-sectional view of the filter in a filtration state, and FIG. 3 is backwashing of the filter. Longitudinal sectional view in the state, FIG. 4 is a perspective view of the same filter, FIG.
FIG. 7 is a perspective view of a filter according to a second embodiment of the present invention, FIG. 6 is a longitudinal sectional view of the filter in a filtration state, and FIG.
FIG. 8 is a horizontal cross-sectional view of the filter in a filtration state, FIG. 8 is a vertical cross-sectional view of the filter in a backwash state, and FIG. 9 is a horizontal cross-section in the backwash state of the filter. The figure is a vertical cross-sectional view of a conventional filter. 1 ... Main body, 2 ... Water supply pipe 3 ... Filtration water discharge pipe 4 ... Filtration cartridge 5 ... Cover, 9 ... Valve casing 10 ... Valve body, 11 ... Shaft section 12 ... Water channel, 13 , 14 ... Recess 16 ... Inflow port 17,18,19,20 …… Water channel 21 …… Recess, 22 …… Backwash water discharge port 26a …… Discharge pipe, 28 …… Pipe part 28a …… Mouth part, 48 ...... hollow fiber

Continuation of front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location B01D 29/60 29/62 63/02 6953-4D C02F 1/44 B 8014-4D

Claims (2)

[Claims] 1. A filtration cartridge having a filter medium enclosed therein, and a filter main body accommodating the filtration cartridge, wherein a raw water inlet for introducing raw water into the filter main body is provided and a water discharge pipe is provided. Is rotatably provided, the water flowing in from the raw water inlet in the filtration state is passed through the filtration cartridge in the forward direction, and the water flowing in from the raw water inlet in the backwash state is filtered by the filtration cartridge. The water cartridge is provided with a water passage switching valve that passes in the reverse direction, the water discharge pipe and the valve body of the water passage switching valve are connected, and the valve body is displaced by the rotation of the water discharge pipe to displace the filtration state and backwash. A filter characterized by being configured to switch between states. 2. A filtration cartridge having a filter medium enclosed therein, and a filter main body accommodating the filtration cartridge, wherein a raw water inlet for introducing raw water is provided at the front part of the filter main body. The discharge pipe is rotatably provided so that the water flowing from the raw water inlet in the filtration state is passed through the filtration cartridge in the forward direction, and the water flowing from the raw water inlet in the backwash state is removed. A water passage switching valve that passes through the filtration cartridge in the reverse direction is provided, the water discharge pipe and the valve body of the water passage switching valve are connected, and the valve body is displaced by the rotation of the water discharge pipe to set the filtration state. A filter provided with a backwash water discharge pipe configured to switch between a backwash state and a water discharge pipe connected to a discharge port when the water discharge pipe is displaced so as to be in a backwash state.