JP2013078736A - Water cleaning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water cleaning device which is made compact and has simplified structure.SOLUTION: The water cleaning device 2 includes a permeation unit 4 permeating liquid, and a body 6. The permeation unit 4 includes a flow passage forming body 8 which is spirally disposed while forming a spiral clearance S1, and a guide member 10 which secures the spiral clearance S1 while keeping the flow passage forming body 8 in a spiral state. The body 6 includes a flow-in port x1, a flow-out port y1 and a filtrate flow-out port z1. The flow passage forming body 8 includes a flow passage r1 being a hollow part of the flow passage forming body, a flow passage introducing port x2 communicated with the flow passage r1, a flow passage discharge port y2 communicated with the flow passage r1, and a membrane member m1 forming at least a part of a wall face of the flow passage r1. At least a part of the membrane member m1 is a permeable membrane. Raw liquid WG flowing into the flow passage r1 goes through the permeable membrane and is separated into permeated liquid WR flowing out of the filtrate flow-out port z1 and concentrated liquid WC discharged from the flow-out port y1.

Description

  The present invention relates to a water purifier.

  Water obtained from the water source is purified through multiple stages of filtration. This multi-stage filtration is roughly divided into pre-filtration and main filtration.

  Pre-filtration removes relatively large impurities. In this prefiltration, a nucleating agent is usually used. The nucleating agent makes the impurities and harmful substances contained in the aqueous solution into large particles. For example, a nucleating agent makes particles of a charged substance such as heavy metal ions into large particles. Larger particles are removed in pre-filtration. This prefiltration is also applied to water treated by the activated sludge method. Pre-filtration removes flocs produced by nucleation or activated sludge processes. Usually, the size of a substance that needs to be removed by pre-filtration is 20 μm or more, and a substance having a size of less than 20 μm may be removed at the same time.

  On the other hand, in this filtration, finer impurities are removed. Typically, in this filtration, a reverse osmosis membrane (RO membrane), an ultrafiltration membrane (UF membrane) and / or a microfiltration membrane (MF membrane) are used.

  When a reverse osmosis membrane (RO membrane) is used, a pressure greater than the osmotic pressure is applied. By this pressure, only water molecules permeate the reverse osmosis membrane (RO membrane) and shift from the concentrated solution side to the diluted solution side. In this reverse osmosis membrane (RO membrane), ions, low-molecular compounds and the like are separated.

  The ultrafiltration membrane (UF membrane) has a pore diameter of about 0.001 μm to 0.01 μm. For example, viruses, enzymes, polymer compounds and the like can be separated by an ultrafiltration membrane (UF membrane). Cryptosporidium, bacteria, etc. can also be isolated.

  The microfiltration membrane (MF membrane) has a pore diameter of about 0.1 μm to several μm. For example, colloidal particles, suspended matter, etc. can be separated by a microfiltration membrane (MF membrane).

  In tap water filtration, an ultrafiltration membrane (UF membrane) and a microfiltration membrane (MF membrane) are mainly used. Reverse osmosis membranes (RO membranes) are used for production of ultrapure water, industrial water, etc., as well as seawater desalination.

  Water purifiers using these filtration membranes are known. Japanese Patent Application Laid-Open No. 11-207156 discloses a fluid separation element having a membrane unit around a water collection pipe and an exterior body formed outside the membrane unit. A telescope prevention plate is detachably attached to at least one end of the fluid separation element. The membrane unit includes a separation membrane, a permeate channel material, and a stock solution channel material. The membrane unit is wound in a spiral around the water collection pipe.

JP-A-11-207156

  Water purifiers are roughly classified into a dead end type and a cross flow type. In the case of the dead-end type, the entire amount of treated water is permeated through the membrane, so that the filtration membrane is likely to be clogged. For this reason, it is necessary to frequently clean or replace the filtration membrane. Such a problem is suppressed in the cross-flow type water purifier.

  Japanese Patent Application Laid-Open No. 11-207156 discloses a cross flow type water purifier. In Japanese Patent Application Laid-Open No. 11-207156, a liquid channel is formed using a permeate channel material and a stock solution channel material. Therefore, the structure is complicated, and the material cost and the manufacturing cost are high. In addition, since the permeate channel and the stock solution channel are opened at both ends in the longitudinal direction of the membrane unit, the permeate and the stock solution are easily mixed. Further, when a telescope plate, a metal spring 17 (see FIG. 5), an adjuster bolt 18 (see FIG. 6) or the like is used, the structure becomes more complicated and the manufacturing cost increases. In addition, there may be a case where mixing of the permeate and the undiluted solution cannot be suppressed due to problems in assembling these telescope plates, metal springs, or adjuster bolts.

  An object of the present invention is to provide a water purifier that can be miniaturized and can simplify the structure.

  The water purifier according to the present invention includes a permeation unit that can permeate liquid and a body that can accommodate the permeation unit. The transmission unit includes a flow path forming body that is spirally arranged while forming a spiral gap, and a guide member that secures the spiral gap while holding the flow path forming body in a spiral shape. doing. The body has an inlet, an outlet, and a filtrate outlet. The flow path forming body includes at least a part of a flow path that is a hollow portion, a flow path introduction port that communicates with the flow path, a flow path discharge port that communicates with the flow path, and a wall surface of the flow path. The film member is formed. At least a part of the membrane member is a permeable membrane. The undiluted solution that has flowed into the flow path from the flow path inlet through the flow inlet, passes through the permeation membrane and flows out from the filtrate flow outlet, and the flow through the flow path discharge opening. Separated into concentrated liquid discharged from the outlet.

  Preferably, the flow path of the flow path forming body is formed by a sealing member and the film member attached to the sealing member. Preferably, the sealing member is spirally held by the guide member.

  Preferably, a spiral assembly including the flow path forming body and the guide member is formed. Preferably, the helical assembly has an upstream surface and a downstream surface. Preferably, the channel introduction port is provided on the upstream surface. Preferably, the flow path outlet is provided on the downstream surface. Preferably, the upstream surface is sealed by a water stop member except for the flow path introduction port. Preferably, the downstream surface is sealed by a water stop member except for the flow path outlet.

Preferably, the flow path forming body has an inner cylindrical body at an inner end thereof.
Preferably, the flow path forming body has an outer cylindrical body at an outer end thereof.
Preferably, the inner cylindrical body has an inner cylinder end opening and an inner cylinder side surface opening. Preferably, the inner cylinder end opening is used as the flow path inlet. Preferably, the inner cylinder side surface opening communicates with the flow path. Preferably, the outer cylindrical body has an outer cylinder end opening and an outer cylinder side opening. Preferably, the outer cylinder end opening is used as the flow path outlet. Preferably, the outer cylinder side surface opening communicates with the flow path.

  Preferably, the flow path of the flow path forming body is formed by a first sealing member, a second sealing member, and a film member attached to these sealing members. Preferably, a first guide member and a second guide member are provided as the guide member. Preferably, the first sealing member is spirally held by the first guide member. Preferably, the second sealing member is spirally held by the second guide member.

  Preferably, a spacer is provided on a side surface of the transmission unit. Preferably, the first edge portion of the spacer is in contact with the first guide member. Preferably, the second edge portion of the spacer is in contact with the second guide member.

The water purification system according to the present invention includes any one of the water purification devices described above, a liquid storage tank, and a pipeline. The pipe line includes an external discharge port, a first pipeline system connecting the outlet of the liquid storage tank and the inlet of the water purifier, and a second pipeline connecting the outlet of the water purifier and the external outlet. A third conduit system connecting the outlet of the liquid storage tank and the external discharge port without passing through the water purification apparatus 2 and the first outlet connecting the outlet of the water purification apparatus and the inlet of the liquid storage tank. It has a four-pipe system and a valve. In this water purification system, switching to the following three routes is possible.
(1) A circulation route that returns from the liquid storage tank to the liquid storage tank via the water purifier.
(2) A first discharge route from the liquid storage tank to the external discharge port via the water purifier.
(3) A second discharge route from the liquid storage tank to the external discharge port without passing through the water purifier.

  In the cross-flow type water purifier, miniaturization and simplification can be achieved.

FIG. 1 is a perspective view of a water purifier according to an embodiment of the present invention. FIG. 2 is a partial cross-sectional perspective view of the water purifier of FIG. FIG. 3 is a longitudinal sectional view of the water purifier of FIG. FIG. 4 is a cross-sectional view of the water purifier of FIG. FIG. 5 is a perspective view of the flow path forming body. FIG. 6 is a perspective view of the guide member. FIG. 7 is an enlarged view of a portion F7 in FIG. FIG. 8 is a perspective view of the inner cylindrical body. FIG. 9 is a perspective view of the outer cylindrical body. FIG. 10 is a perspective view of the spacer. FIG. 11 is a perspective view showing the spiral assembly and the spacer. FIG. 12 is a perspective view showing the water stop member and the intermediate member. FIG. 13 is an enlarged cross-sectional view showing a modification of the transmission unit. FIG. 14 is a schematic diagram illustrating an example of a water purification system.

  Hereinafter, the present invention will be described in detail based on preferred embodiments with appropriate reference to the drawings.

  FIG. 1 is a perspective view of a water purifier 2 according to an embodiment of the present invention. FIG. 2 is a cross-sectional perspective view of the water purifier 2. FIG. 3 is a cross-sectional view of the water purifier 2. 2 and 3 are both longitudinal sectional views. FIG. 4 is a cross-sectional view in the lateral direction. 2 and FIG. 3 are different in cross-sectional position. The position of the cross section in FIG. 2 is shown by the F2-F2 line in FIG. The position of the cross section in FIG. 3 is indicated by the line F3-F3 in FIG.

  The water purifier 2 has a transmission unit 4 and a body 6. The body 6 accommodates the transmission unit 4. In the water purifier 2, the transmission unit 4 is not visible from the outside. Therefore, in the perspective view (FIG. 1) of the water purifier 2, the permeation | transmission unit 4 is not drawn. This water purifier 2 is suitably used in the prefiltration.

  The body 6 includes an upstream member 6a, a downstream member 6b, and an intermediate member 6c. The upstream member 6a has an inflow port x1. The downstream member 6b has an outlet y1. The intermediate member 6c has a filtrate outlet z1. The upstream member 6a is joined to the upstream side of the intermediate member 6c. Examples of the bonding include bonding with an adhesive and screw connection. The downstream member 6b is joined to the downstream side of the intermediate member 6c. Examples of the bonding include bonding with an adhesive and screw connection. These joints are watertight. Except for the three openings x1, y1, and z1, the body 6 does not have liquid permeability.

  The upstream member 6a has an inflow pipe 7a. The end of the inflow pipe 7a is an inflow port x1. The downstream side member 6b has an outflow pipe 7b. The end of the outflow pipe 7b is an outflow port y1. The intermediate member 6c has a filtrate outflow pipe 7c. The end of the filtrate outlet pipe 7c is a filtrate outlet z1.

  The body 6 has an internal space k1 (see FIG. 3). The transmission unit 4 is accommodated in the internal space k1.

  The transmission unit 4 includes a flow path forming body 8 and a guide member 10. FIG. 5 is a perspective view of the flow path forming body 8. FIG. 6 is a perspective view of the guide member 10. FIG. 7 is an enlarged view of a portion surrounded by a two-dot chain line in FIG.

  The flow path forming body 8 shown in FIG. 5 is a strip-shaped cylinder. In other words, the flow path forming body 8 is a hollow and band-shaped bag member. The inside of the flow path forming body 8 is hollow. This hollow portion is a flow path r1 (described later). In the water purifier 2, the strip-shaped flow path forming body 8 has a spiral shape. Since the flow path forming body 8 has flexibility, it is wound spirally. The perspective view shown in FIG. 5 shows this spiral state. The spiral shape of the flow path forming body 8 may not be an accurate spiral. For example, the spiral gap S1 (described later) may be changed. Further, the width G1 of the flow path r1 and the width G2 of the spiral gap S1 (see FIG. 7) may not be constant.

  From the viewpoint of facilitating understanding of the drawing, the flow path r1 is shown by hatching in FIG. In FIG. 4, the spiral channel without hatching is the permeate channel r2 (helical gap S1). By making the flow path forming body 8 spiral, the flow path r1 becomes spiral and the permeate flow path r2 also becomes spiral.

  As shown in FIG. 5, the flow path forming body 8 is spirally arranged while forming the spiral gap S <b> 1. From the viewpoint of facilitating understanding of the drawing, in FIG. 5, the upper surface of the flow path forming body 8 (first sealing member f <b> 11 described later) is hatched. In FIG. 5, the part without hatching is the spiral gap S1. As will be described later, the spiral gap S1 is a permeate channel r2.

  Although details of the structure of the flow path forming body 8 will be described later, the flow path forming body 8 is a flexible member. When the water pressure acts on the flow path r1, it is difficult to maintain the spiral state with the flow path forming body 8 alone. Therefore, a guide member 10 is provided. As shown in FIG. 6, the guide member 10 is a member formed in a spiral shape. The guide member 10 secures the spiral gap S1 while holding the flow path forming body 8 in a spiral shape. In other words, the guide member 10 serves as a spacer for forming the spiral gap S1. In the transmission unit 4, the guide member 10 is fitted in the spiral gap S1 in FIG. As will be described later, two guide members 10 are used. Although the number of the guide members 10 may be one, the two guide members 10 can more reliably hold the spiral state.

  As shown in FIG. 7, the flow path forming body 8 includes a flow path r1 and a film member m1. Between one membrane member m1 and the other membrane member m1 facing each other is a flow path r1. Furthermore, the flow path forming body 8 has a sealing member f1. The flow path forming body 8 has two sealing members f1. In FIG. 7, the 1st sealing member f1 is shown by the code | symbol f11, and the 2nd sealing member f1 is shown by the code | symbol f12. The film member m1 is bonded to the sealing member f11 and the sealing member f12. The flow path r1 is formed by this adhesion.

  At least a part of the membrane member m1 is a permeable membrane. In the present embodiment, all of the membrane member m1 is a permeable membrane. A part of the membrane member m1 may be a permeable membrane, an example of which will be described later.

  The membrane member m1 forms a flow path r1. In other words, the membrane member m1 faces the flow path r1. A portion of the film member m1 facing the flow path r1 is referred to as a flow path forming surface. The total area of the flow path forming surface is A1. Moreover, the area of the part which is a permeation | transmission film | membrane among this flow path formation surface is set to A2. From the viewpoint of increasing the filtration capacity, (A2 / A1) is preferably 0.25 or more, more preferably 0.5 or more, still more preferably 0.75 or more, and particularly preferably 0.9 or more. In the present embodiment, (A2 / A1) is 1.

  Further, the flow path forming body 8 includes an inner cylindrical body 14 and an outer cylindrical body 16. As shown in FIG. 5, the inner cylindrical body 14 is provided at the inner end of the flow path forming body 8. On the other hand, the outer cylindrical body 16 is provided at the outer end of the flow path forming body 8. The inner cylindrical body 14 has a flow path introduction port x2. The outer cylindrical body 16 has a flow path outlet y2.

  FIG. 8 is a perspective view of the inner cylindrical body 14. The inner cylindrical body 14 has an inner cylinder end opening 14a and an inner cylinder side surface opening 14b. The inner cylinder end opening 14 a is provided at one end of the inner cylinder body 14. The inner cylinder end opening 14a is a flow path introduction port x2. On the other hand, the inner cylinder side surface opening 14b communicates with the flow path r1. The opening 14c at the other end is closed by a sealing member f1 (second sealing member f12).

  Furthermore, the inner cylindrical body 14 has an inner cylindrical wall body portion 14d. The inner cylindrical wall body portion 14d closes one end (inner end) of the flow path r1. In other words, one end of the flow path r1 is closed by the inner cylindrical wall body portion 14d.

  FIG. 9 is a perspective view of the outer cylindrical body 16. The outer cylindrical body 16 has an outer cylinder end opening 16a and an outer cylinder side surface opening 16b. The outer cylinder end opening 16 a is provided at one end of the outer cylindrical body 16. The outer cylinder end opening 16a is a flow path outlet y2. On the other hand, the outer cylinder side surface opening 16b communicates with the flow path r1. The opening 14c at the other end is closed by the sealing member f1 (first sealing member f11).

  Further, the outer cylindrical body 16 has an outer cylindrical wall body portion 16d. The outer cylindrical wall portion 16d closes the other end (outer end) of the flow path r1. In other words, the other end of the flow path r1 is closed by the outer cylindrical wall body portion 16d.

  The flow path forming body 8 is closed except for the flow path introduction port x2 and the flow path discharge port y2. In other words, the openings provided in the flow path forming body 8 are limited to the flow path introduction port x2 and the flow path discharge port y2. Therefore, the liquid that has entered the flow channel r1 from the flow channel introduction port x2 either passes through the membrane member m1 or is discharged from the flow channel discharge port y2.

  As described above, there are two guide members 10. As shown in FIG. 7, the first guide member 10a is provided on the upstream side, and the second guide member 10b is provided on the downstream side. The first guide member 10a and the second guide member 10b are the same member. The first guide member 10a holds the upstream side of the flow path forming body 8 in a spiral shape. The second guide member 10b holds the downstream side of the flow path forming body 8 in a spiral shape. A spiral gap S1 is formed between the first guide member 10a and the second guide member 10b. Therefore, in the cross-sectional view of FIG. 3, the spiral gap S1 and the flow path r1 are alternately arranged. The spiral gap S1 and the flow path r1 are partitioned by the film member m1.

  The film member m1 is a sheet. The membrane member m1 has poor rigidity. Unless the highly rigid membrane member m1 is used, it is difficult to hold the spiral flow path r1 with only the membrane member m1. On the other hand, the sealing member f1 has higher bending rigidity than the membrane member m1. By using the sealing member f1, the spiral shape of the flow path forming body 8 is easily maintained. The guide member 10 holds the sealing member f1 in a spiral shape. The first guide member 10a holds the first sealing member f11 in a spiral shape. The second guide member 10b holds the second sealing member f12 in a spiral shape. With such a configuration, the spiral gap S1 and the spiral flow path r1 are ensured with high accuracy.

  The water purifier 2 further has a spacer 18. FIG. 10 is a perspective view of the spacer 18. The spacer 18 is a substantially band-shaped member. In FIG. 10, the spacer 18 has an annular shape, but actually, the single spacer 18 has a flat plate shape. The spacer 18 is made of a material that can be elastically deformed. By disposing inside the intermediate member 6c, the spacer 18 is elastically deformed into an annular shape shown in FIG. Therefore, in FIG. 10 and FIG. 11 described later, the spacer 18 in a state of being disposed inside the intermediate member 6c is shown. Of course, a single annular spacer may be used.

  FIG. 11 is a perspective view showing a state where the spacer 18 is attached to the spiral assembly Sp. The spiral assembly Sp is composed of a flow path forming body 8 and two guide members 10. The spacer 18 is provided on the side surface of the spiral assembly Sp. The spacer 18 has a first edge 18a and a second edge 18b. The first edge portion 18a is in contact with the first guide member 10a (the lower surface thereof). The first edge portion 18a is in contact with the outermost peripheral portion of the spiral first guide member 10a. The second edge portion 18b is in contact with (the upper surface of) the second guide member 10b. The second edge portion 18b is in contact with the outermost peripheral portion of the spiral second guide member 10b.

  The spacer 18 has an avoidance portion 18c for avoiding interference with the filtrate outflow pipe 7c. In the mounted state (annular state in FIGS. 10 and 11), the avoiding portion 18c is substantially circular. The filtrate outflow pipe 7c penetrates the avoidance portion 18c.

  In the mounted state, the spacer 18 has a first gap 18d and a second gap 18e. When the belt-like spacer 18 is annular, both ends of the spacer 18 face each other. The gap formed by this facing is the first gap 18d and the second gap 18e. The first gap 18d is formed in the first edge 18a. The second gap 18e is formed in the second edge 18b.

  The first gap 18d and the second gap 18e are used for positioning the guide member 10 in the circumferential direction. As shown in FIGS. 6 and 11, the guide member 10 has a protrusion 20. The protrusion 20 is provided on the outermost peripheral portion of the spiral of the guide member 10. The first protrusion 20 a is provided on the front side of the guide member 10. Further, the second protrusion 20 b is provided on the back side of the guide member 10. The circumferential position of the first protrusion 20a is the same as the circumferential position of the second protrusion 20b.

  As shown in FIG. 11, the second protrusion 20b of the first guide member 10a is fitted in the first gap 18d (see FIG. 10). Further, the first protrusion 20a of the second guide member 10b is fitted in the second gap 18e (see FIG. 10). Therefore, the positional relationship in the circumferential direction is the same between the first guide member 10a and the second guide member 10b.

  Thus, the spacer 18 positions the first guide member 10a and the second guide member 10b with high accuracy. The transmission unit 4 can be assembled with high accuracy by the spacer 18. Further, the spacer 18 improves the workability of assembling the transmission unit 4.

  The first guide member 10a and the second guide member 10b are exactly the same members. When the guide member 10 is used on the upstream side as the first guide member 10a, the first protrusion 20a is not used and the second protrusion 20b is used. On the other hand, when the guide member 10 is used as the second guide member 10b on the downstream side, the second protrusion 20b is not used and the first protrusion 20a is used. By providing both the first protrusion 20a and the second protrusion 20b, the same member can be used as the first guide member 10a and can also be used as the second guide member 10b. This common use of parts (guide members) contributes to cost reduction and assembly efficiency.

  As shown in FIGS. 3 and 7, the upstream surface 8a of the flow path forming body 8 is sealed by the water stop member v1 except for the flow path introduction port x2. Further, the downstream surface 8b of the flow path forming body 8 is sealed by the water stop member v2 except for the flow path discharge port y2. In this embodiment, the water stop members v1 and v2 are adhesive layers. In addition, in order to make an understanding easy, description of the water stop member v1 and the water stop member v2 is abbreviate | omitted in FIG.

  FIG. 12 is a perspective view showing the intermediate assembly Ms1. The intermediate assembly Ms1 is obtained by applying an adhesive to the upstream surface Sp1 and the downstream surface Sp2 of the spiral assembly Sp. The water stop member v1 and the water stop member v2 are obtained by curing the applied adhesive.

  The water stop member v1 covers the outer surface of the sealing member f1 (first sealing member f11). Although not shown, a part of the adhesive constituting the water stop member v1 is impregnated into the sealing member f1 (first sealing member f11). A part of the adhesive constituting the water blocking member v2 is impregnated in the sealing member f1 (second sealing member f12). Due to these impregnations, the water permeability of the sealing member f1 is suppressed.

  The water stop member v2 covers the outer surface of the sealing member f1 (second sealing member f12). Although not shown, a part of the adhesive constituting the water stop member v1 enters between the first sealing member f11 and the first guide member 10a. Similarly, a part of the adhesive constituting the water blocking member v2 enters between the second sealing member f12 and the second guide member 10b. The adhesive impregnates the film member m1 located between the sealing member f1 and the guide member 10. The adhesive prevents water leakage from between the sealing member f1 and the guide member 10.

  The water stop member v1 covers the entire upstream surface Sp1 of the spiral assembly Sp except for the flow path introduction port x2 (see FIGS. 3, 7, and 12). Further, the periphery of the water stop member v1 is in close contact with the body 6 (intermediate member 6c) (see FIGS. 3 and 12). The water stop member v2 covers the entire downstream surface Sp2 of the spiral assembly Sp except for the flow path outlet y2 (see FIGS. 3 and 7). Further, the periphery of the water stop member v2 is in close contact with the body 6 (intermediate member 6c) (see FIG. 3).

  The water stop member v1 does not cause water leakage on the upstream surface Sp1. The water stop member v2 does not cause water leakage on the downstream surface Sp2. The stock solution WG is either discharged from the filtrate outlet z1 or discharged from the outlet y1. The permeated liquid WR discharged from the filtrate outlet z1 is not mixed with liquid that does not permeate the permeable membrane.

[Water flow]
In the present application, the liquid flowing into the inflow port x1 is also referred to as a stock solution WG. The stock solution WG enters the water purifier 2 from the inlet x1. This stock solution WG reaches from the inlet x1 to the channel inlet x2. Water enters the flow channel r1 from the flow channel introduction port x2 (see arrow ar1 in FIG. 5). The stock solution WG that has entered the flow path r1 flows through the flow path r1. The stock solution WG flows spirally along the flow path r1. A part of the water flowing through the flow path r1 permeates the membrane member m1 (permeation membrane) and reaches the spiral gap S1. The spiral gap S1 functions as the permeate channel r2. The liquid that has flowed into the spiral gap S1 (permeate channel r2) flows spirally through the permeate channel r2 and flows out from the end outlet Ex2 (see arrow ar2 in FIG. 5). The permeated liquid WR flowing out from the permeate flow path r2 reaches the filtrate outlet z1. All the permeate liquid WR collects at the filtrate outlet z1. The permeated liquid WR is discharged from the filtrate outlet z1 to the outside of the water purification device 2. Thus, the water purifier 2 is a cross flow type.

In the water purifier 2, the following phenomenon A may occur. When this phenomenon A occurs, a part of the filtered water can be discharged from the outlet y1. This discharge can lower the filtration efficiency.
[Phenomenon A]: A part of the water flowing through the spiral gap S1 (permeate channel r2) permeates the permeable membrane and moves to the channel r1 again.

  However, even when the phenomenon A occurs, the permeable liquid WR reaching the filtrate outlet z1 has permeated the permeable membrane at least once. The permeable liquid WR is not mixed with water that does not pass through the permeable membrane.

  As described above, the channel outlet y2 is the only outlet in the channel r1. Therefore, all the water (concentrated liquid WC) that has not passed through the membrane member m1 is discharged from the flow path discharge port y2 (see arrow ar3 in FIG. 5). The concentrated liquid WC discharged from the flow path outlet y2 reaches the outlet y1, and is discharged from the outlet y1 to the outside of the water purifier 2.

  As described above, when the phenomenon A occurs, water that has passed through the filtration membrane may also exist in the flow path r1. However, in order to pass through the filtration membrane and reach the flow path r1, it must pass through the filtration membrane at least twice. The probability of passing through the filtration membrane twice is low. Even when the phenomenon A occurs, the amount of water that passes through the filtration membrane and reaches the flow path r1 is small. In the concentrated liquid WC, the mixing ratio of the liquid that has passed through the filtration membrane is low. Details of this reason will be described later.

  Thus, the water purifier 2 separates the stock solution WG into the permeated liquid WR and the concentrated liquid WC. The permeated liquid WR flows into the flow channel r1 from the flow channel inlet x2 through the inlet x1, passes through the permeable membrane, and is discharged from the filtrate outlet z1. On the other hand, the concentrated liquid flows into the flow channel r1 from the flow channel introduction port x2 and is discharged from the flow channel discharge port y2.

[Water pressure P1, P2]
The water pressure in the flow path r1 is P1. The water pressure in the permeate channel r2 is P2. Here, a comparison between the water pressure P1 and the water pressure P2 is considered.

  As described above, the flow path r1 is not open except for the flow path introduction port x2 and the flow path discharge port y2. On the other hand, in the permeate channel r2 (spiral gap S1), the spiral end outlet Ex2 (see FIG. 5) is wide. When the longitudinal length of the permeate channel r2 is V2 (see FIG. 7) and the width of the permeate channel r2 is G2 (see FIG. 7), the opening area of the spiral end outlet Ex2 is the product. (V2 × G2). This opening area is wider than the opening area of the flow path outlet y2.

  Further, the outlet of the permeating liquid WR is not limited to the spiral end outlet Ex2. The permeable liquid WR is also discharged from the permeable membrane mx located on the outer surface fc (see FIGS. 5 and 4) of the outermost periphery of the spiral of the flow path forming body 8. When the longitudinal length of the flow path r1 is V1 (see FIG. 7) and the maximum external distance of the outer surface fc is Dm (see FIG. 4), the area of the outer surface fc is the product (V1 × Dm × π). Is approximately equal to Since the outer surface fc is located on the outermost peripheral portion of the spiral, the distance Dm is large. Therefore, the area of the outer surface fc is wide.

  Thus, a wide outlet is secured in the permeable liquid WR. On the other hand, the outlet of the concentrated liquid WC is limited to the flow path outlet y2. For this reason, the water pressure P1 is usually higher than the water pressure P2. Due to this water pressure relationship (P1> P2), permeation from the flow path r1 (water pressure P1) to the permeate flow path r2 (water pressure P2) is likely to occur. For this reason, the permeation | transmission liquid WR can be produced | generated efficiently. On the other hand, due to (P1> P2), permeation from the permeate channel r2 (water pressure P2) to the channel r1 (water pressure P1) is unlikely to occur. The magnitude relationship between the water pressure P1 and the water pressure P2 may be temporarily or locally reversed. In this case, the phenomenon A can occur. However, except for such a case, it is considered that almost no permeation from the permeate channel r2 to the channel r1 occurs. Therefore, mixing of the filtered liquid into the concentrated liquid WC is effectively suppressed. Thus, in the water purifier 2, the permeated liquid WR and the concentrated liquid WC are efficiently separated.

  In FIG. 7, what is indicated by a double arrow G1 is the width of the flow path r1. In FIG. 7, what is indicated by a double arrow G2 is the width of the permeate channel r2 (spiral gap S1). When water is passed through, the membrane member m1 can be deformed. For this reason, the width G1 and the width G2 are values in a state where water is not passed.

  When the water pressure P1 increases, the membrane member m1 of the flow path forming body 8 can be deformed outward. In this deformed portion, the width of the permeate channel r2 becomes narrow. The water pressure P2 is likely to increase due to the narrow width of the permeate channel r2. As the water pressure P2 increases, the probability that the phenomenon A will occur increases. From the viewpoint of suppressing the phenomenon A, the ratio (G1 / G2) is preferably equal to or less than 0.7, more preferably equal to or less than 0.6, and particularly preferably equal to or less than 0.5.

  On the other hand, when the supply amount of the stock solution is small, the water pressure P1 is difficult to increase. In this case, the deformation of the flow path forming body 8 to the outside of the film member m1 hardly occurs. Therefore, the increase in the water pressure P2 due to this deformation is suppressed. In this case, the permeation efficiency to the permeable membrane may increase if G1 is widened to make the flow of the flow path r1 smooth. Considering this viewpoint, the ratio (G1 / G2) is preferably 1.5 or more, more preferably 1.7 or more, and particularly preferably 2 or more.

  Centrifugal force can act on the liquid flowing along the spiral. By this centrifugal force, the stock solution WG can efficiently permeate the permeable membrane. Further, considering the flow rate of the water flowing through the flow path r1, the flow rate on the membrane side located outside the spiral tends to be faster than the flow rate on the membrane side located inside the spiral. As a result, the film located outside the spiral is less likely to adhere dirt or foreign matter to the film surface than the film located inside the spiral. That is, the film located outside the helix has better antifouling properties than the film located inside the helix.

  Due to the centrifugal force and antifouling property, the liquid flowing through the flow path r1 is more likely to pass through the membrane located outside the helix than the membrane located inside the helix. Considering this viewpoint, the film member m1 of the flow path forming body 8 may be configured as X as follows.

[Configuration X]: Among the film members m1 facing each other through the flow path r1, the inner film member m1 is a film member m1a and the outer film member m1 is a film member m1b (see FIG. 7). At this time, the membrane member m1b (outside) is a permeable membrane, and the membrane member m1a (inside) is a non-permeable membrane.

  In this configuration X, the stock solution WG efficiently permeates the membrane member m1b due to the centrifugal force when flowing through the flow path r1 and because it is excellent in dirt resistance. Further, the centrifugal force acts also when flowing through the permeate channel r2, but the phenomenon A is suppressed by the membrane member m1a. Therefore, the filtration efficiency can be improved.

  For the above reasons, it is preferable that at least a part of the membrane member m1b (outside) is a permeable membrane. Of the membrane member m1b, the entire area of the portion facing the flow path r1 (flow path forming surface) is B1. Of the area B1, the area of the permeable membrane is B2. From the viewpoint of increasing the filtration capacity, (B2 / B1) is preferably 0.5 or more, more preferably 0.75 or more, and still more preferably 0.9 or more. In the present embodiment, (B2 / B1) is 1.

Also, the following configuration Y is possible. With this configuration Y, the same effects as with the configuration X can be obtained.
[Configuration Y]: The membrane member m1b (outside) and the membrane member m1a (inside) are both permeable membranes. However, the permeability of the membrane member m1b is higher than the permeability of the membrane member m1a.

  In addition, the attitude | position of the water purifier 2 at the time of use is not limited. In FIG. 1 and the like, the inlet x1 is on the upper side and the outlet y1 is on the lower side, but the posture is not limited to this. For example, the water purifier 2 may be used in a landscape orientation. In this case, the inlet x1 and the outlet y1 are arranged along the horizontal plane.

  FIG. 13 is a cross-sectional view showing a part of a transmission unit 30 according to a modification. In the transmission unit 30, the second sealing member f12 in the transmission unit 4 is not used. Further, in the transmission unit 30, the second guide member 10b in the transmission unit 4 is not provided. The guide member 10 is disposed in the same manner as the first guide member 10 a in the transmission unit 4. The sealing member f1 is arranged in the same manner as the first sealing member f11 in the transmission unit 4. In the transmission unit 30, the membrane member m <b> 1 has a bent portion 32. One end m11 of one film member m1 is bonded to the sealing member f1, and the other end m12 of the same film member m1 is bonded to the same sealing member f1 to which the one end m11 is bonded. It is glued. That is, the closed flow path r1 is formed by only one sealing member f1 by bending one film member m1. In the transmission unit 30, a reduction in cost, a reduction in the number of parts, and an increase in assembly efficiency can be achieved.

  The form of the guide member 10 is not limited to the spiral shape shown in FIG. For example, a member in which a spiral groove is formed in a disk can also be used as the guide member 10. In this example, the diameter of the disc is substantially the same as the inner diameter of the intermediate member 6c. The width of the spiral groove is substantially the same as the thickness of the flow path forming body 8 (the width of the sealing member f1). By inserting the flow path forming body 8 into the spiral groove, the flow path forming body 8 can be held in a spiral shape. In this form of the guide member, watertightness can be ensured by filling the gap between the peripheral edge of the disc and the intermediate member 6c. Therefore, it is not necessary to apply the water stop member v1 over a wide range as in the above embodiment.

  Further, the guide member 10 may not be held over the entire length of the flow path forming body 8 in the spiral circumferential direction. For example, the guide member 10 may hold the flow path forming body 8 intermittently in the spiral circumferential direction.

[Sealing material]
The bending rigidity of the sealing member f1 is higher than that of the membrane member m1. The sealing member f1 contributes to maintaining the shape of the flow path forming body 8. Preferably, the width of the sealing member is the same as the width of the flow path r1. Although the water permeability of the sealing member is not limited, it is preferable that the water permeability is low, and it is more preferable that there is no water permeability. The water permeability of the sealing member f1 is preferably lower than that of the membrane member m1. However, when water tightness is ensured by the water stop member, the water permeability of the sealing member does not affect the performance of the transmission unit 4.

  Examples of the material of the sealing member f1 include felt, rubber, and foamed silicon. The permeation unit 4 can also be used for purifying drinking water. Therefore, a material approved by the Food Sanitation Law as being suitable for drinking is preferable. From this viewpoint, a foamed silicon material, rayon felt, and phenol felt are preferable.

  In assembling the flow path forming body 8, the flow path forming body 8 is inserted along the spiral gap of the guide member 10. From the viewpoint of smooth insertion, the sealing member f1 preferably has elasticity. From this viewpoint, a foamed silicon material is more preferable.

The sealing member f1 has flexibility. The flow path forming body 8 is also flexible. Therefore, after the flow path forming body 8 is manufactured, the flow path forming body 8 can be spirally deformed. Therefore, the degree of freedom of the manufacturing method of the flow path forming body 8 is high. An example of this manufacturing method is as follows. Other methods may be employed as appropriate.
(Step 1) Two strip-shaped film members m1 are prepared. The width of the film member m1 is V3. This V3 is the width of the flow path forming body 8 (see FIG. 7).
(Step 2) A first sealing member f11 and a second sealing member f12 are prepared.
(Step 3) Two sealing members f11 and f12 are bonded to the first film member m1.
(Step 4) In the member obtained in Step 3, the second film member m1 is bonded to the sealing members f11 and f12. By this adhesion, a gap is formed between the first film member m1 and the second film member m1. This gap is formed by the sealing members f11 and f12. The first film member m1 and the second film member m1 face each other through this gap.
(Step 5) In steps 3 and / or 4, the inner cylindrical body 14 and the outer cylindrical body 16 are bonded to the film member m1 and / or the sealing members f11 and f12.

  From the viewpoint of workability when the guide member 10 is inserted into the spiral gap, the hardness Hf of the sealing member f1 is preferably 50 or less, and more preferably 40 or less. From the viewpoint of preventing insufficient rigidity of the transmission unit 4 and from the viewpoint of productivity of assembly of the transmission unit 4, the hardness Hf is preferably 20 or more, more preferably 25 or more, and still more preferably 30 or more. The hardness Hf is measured with a type E durometer. This measurement is performed according to JIS-K-6253.

  An application agent such as an adhesive may be used as the water stop members v1 and v2. In this case, it is preferable that the coating agent can penetrate into the sealing member f1. By this penetration, the water permeability of the sealing member f1 is suppressed. Further, the penetration improves the adhesion between the water stop members v1 and v2 and the sealing member f1.

[Membrane member]
At least a part of the membrane member m1 is a permeable membrane. For example, one of the membrane members m1 facing each other via the flow path r1 may be a permeable membrane and the other may be a non-permeable membrane. An example of this case is the configuration X described above. On the other hand, in the flow path forming body 8 of the above embodiment, all of the membrane member m1 is a permeable membrane.

  Examples of the material of the membrane member m1 that is a non-permeable membrane include cellulose, nylon, polypropylene, and polyethylene. From the viewpoint of hydrophobicity, polypropylene and polyethylene are preferred. From the viewpoint of strength, CCP polypropylene (non-axially oriented polypropylene) is particularly preferable.

  Examples of the material of the membrane member m1 that is a permeable membrane include a woven fabric and a non-woven fabric, and a non-woven fabric is preferable from the viewpoint of appropriate water permeability, strength, and cost. Examples of the material of the nonwoven fabric include cellulose, polypropylene, polyethylene, nylon, rayon, and acrylic. Cellulose nonwoven fabric is hydrophilic. Polypropylene nonwoven fabric and polyethylene nonwoven fabric are hydrophobic. A hydrophilic nonwoven fabric has excellent permeability in filtration. From this viewpoint, a cellulose nonwoven fabric is particularly preferable. A cellulose nonwoven fabric has a high heat-resistant temperature and is preferable also in this respect. From the viewpoint of homogeneity, a paper-like cellulose nonwoven fabric is particularly preferable. This paper-like cellulose nonwoven fabric is also highly flexible and facilitates the manufacture of the flow path forming body 8 and the assembly of the transmission unit 4. In the said embodiment, this paper-like cellulose nonwoven fabric was used as the film | membrane member m1. The permeable membrane of the present invention is preferably a membrane capable of removing an object of about 20 μm to 1 mm.

  From the viewpoint of suppressing breakage due to water pressure, the thickness T1 of the permeable membrane is preferably 0.05 mm or more, more preferably 0.1 mm or more, and still more preferably 0.15 mm or more. When the thickness T1 is excessive, flexibility may be insufficient and it may be difficult to deform in a spiral shape. In this respect, the thickness T1 is preferably equal to or less than 0.4 mm, more preferably equal to or less than 0.3 mm, and particularly preferably equal to or less than 0.25 mm. In the said embodiment, thickness T1 was 0.2 mm.

  Note that a permeable membrane in which two or more films having the preferable thickness T1 are stacked may be used. This lamination suppresses variations in manufacturing of the permeable membrane, variations between fiber gaps, and poor transmission due to deterioration with time. In particular, since a nonwoven fabric is not a regularly woven fabric, the gaps between the fibers are likely to vary. Further, this variation may cause a large gap (gap defect) locally. When two or more sheets are laminated, a large gap (gap defect) in one layer is complemented by another layer. Therefore, a more uniform permeable membrane can be realized. However, if the number of stacked layers is too large, productivity may be reduced. In this respect, the number of stacked layers is preferably 3 or less, and particularly preferably 2 sheets.

  From the viewpoint of suppressing clogging, the aperture of the permeable membrane is preferably 5 μm or more, more preferably 10 μm or more, and even more preferably 15 μm or more. From the viewpoint of preventing transmission of large flocs, the aperture of the permeable membrane is preferably 50 μm or less, more preferably 40 μm or less, and even more preferably 30 μm or less.

[Bonding of Membrane Member m1 and Sealing Member f1]
For joining the film member m1 and the sealing member f1, an adhesive made of a material approved under the Food Sanitation Law is preferable. Examples of the adhesive include a silicon adhesive, a urethane adhesive, and a heat seal material. An example of the material of the heat seal material is polypropylene. From the viewpoint of reducing the adhesive strength and the adhesive layer, a silicon-based adhesive and a urethane-based adhesive are preferable. Moreover, it is preferable to use the same material as the water stop members v1 and v2.

  From the viewpoint of cost, injection molding is preferable as a method for producing the guide member 10. The material of the guide member 10 is preferably a material that can be injection molded. From this viewpoint, ABS, nylon, and PBT (polybutylene terephthalate) are exemplified as the material of the guide member 10. In consideration of adhesion with the sealing member f1, ABS and PBT are preferable, and ABS is particularly preferable from the viewpoint of cost. In the above embodiment, ABS is used.

[Bonding of Membrane Member m1 and Guide Member 10]
The same thing as what is used for joining of the membrane member m1 and the sealing member f1 is preferable. In addition, when providing the water stop members v1 and v2, the step of joining the membrane member m1 and the guide member 10 alone is omitted, and the membrane member m1 and the guide member 10 are joined by the water stop members v1 and v2. You can also. In this case, the manufacturing process can be simplified and productivity can be improved.

[Material of body 6]
Examples of the material of the body 6 include vinyl chloride, ABS, and polypropylene. As vinyl chloride, resin used for water pipes is preferable. Considering the adhesion with the sealing member f1, vinyl chloride and ABS are preferable, and vinyl chloride is particularly preferable in view of the results in water supply applications.

[Material of water-stopping members v1, v2]
As the material of the water stop members v1 and v2, an adhesive of a material approved under the Food Sanitation Law is preferable. Examples of the adhesive include a silicon adhesive, a urethane adhesive, and a heat seal material. When there is appropriate fluidity (viscosity), the adhesive can penetrate into the gaps in the upstream surface 8a and the downstream surface 8b. Moreover, the adhesive can penetrate into the sealing member f1 due to the appropriate fluidity. These penetrations improve the water stoppage at the upstream surface 8a and the downstream surface 8b. From the viewpoint of this water-stopping property and adhesive strength, a urethane-based adhesive is preferable.

[Materials of inner cylindrical body 14 and outer cylindrical body 16]
Examples of the material of the cylindrical bodies 14 and 16 include ABS, nylon, polypropylene, and polyethylene. Polypropylene is preferable from the viewpoint of excellent thin-wall moldability. In the above embodiment, polypropylene is employed.

  [Water purification system]

Another embodiment of the present invention is a water purification system using the above water purification apparatus. FIG. 14 is a schematic diagram of a water purification system 40 according to an embodiment of the present invention. The water purification system 40 includes the above-described water purification device 2, the liquid storage tank 42, the conduit 44, the external outlet 46, the valve VL, and the pump PU. The pipeline 44 has a branch b1, a branch b2, and a branch b3. The pipe 44 has the following seven sections.
(Section 1) The first section K1 from the outlet 42a of the liquid storage tank 42 to the branch b1
(Section 2) The second section K2 from the branch b1 to the inlet x1 of the water purifier 2
(Section 3) The third section K3 from the outlet y1 to the branch b2 of the water purifier 2
(Section 4) Fourth section K4 from branch b1 to branch b2
(Section 5) The fifth section K5 from the branch b2 to the branch b3
(Section 6) Sixth section K6 from the inlet 42b of the liquid storage tank 42 to the branch b3
(Section 7) Seventh section K7 from the branch b3 to the external outlet 46

  The water purification system 40 has a plurality of valves VL2, VL3, VL4, VL6 and VL7. The valve VL2 is provided in the second section K2. The valve VL3 is provided in the third section K3. The valve VL4 is provided in the fourth section K4. The valve VL6 is provided in the sixth section K6. The valve VL7 is provided in the seventh section K7.

  The pump PU is provided in the fifth section K5.

By these sections K1 to K7, the following four pipeline systems are formed in the pipeline 44.
(A) First pipeline system connecting the outlet 42a of the liquid storage tank 42 and the inlet x1 of the water purifier 2 (b) Second pipeline system connecting the outlet y1 of the water purifier 2 and the external outlet 46 (C) A third pipeline system connecting the outlet 42a of the liquid storage tank 42 and the external outlet 46 without going through the water purification apparatus 2 (d) The outlet y1 of the water purification apparatus 2 and the inlet 42b of the liquid storage tank 42 4th pipeline system connecting

  The first pipeline system includes a first section K1 and a second section K2. The second pipeline system includes a third section K3, a fifth section K5, and a seventh section K7. The third pipeline system includes a first section K1, a fourth section K4, a fifth section K5, and a seventh section K7. The fourth pipeline system includes a third section K3, a fifth section K5, and a sixth section K6.

In the water purification system 40, the following three routes can be switched. This switching of the route is achieved by appropriately opening and closing the valves VL2, VL3, VL4, VL6 and VL7.
(1) A circulation route that returns from the liquid storage tank 42 to the liquid storage tank 42 via the water purifier 2.
(2) A first discharge route from the liquid storage tank 42 to the external discharge port 46 via the water purifier 2.
(3) A second discharge route from the liquid storage tank 42 to the external discharge port 46 without going through the water purifier 2.

When the above circulation route is adopted, the opening and closing of each valve is set as follows.
[Circulation route]
・ Valve VL2: Open ・ Valve VL3: Open ・ Valve VL4: Close ・ Valve VL6: Open ・ Valve VL7: Close

  In this circulation route, the conduit 44 through which the liquid flows is a first section K1, a second section K2, a third section K3, a fifth section K5, and a sixth section K6.

When the first discharge route is employed, the opening / closing of each valve is set as follows.
[First discharge route]
・ Valve VL2: Open ・ Valve VL3: Open ・ Valve VL4: Close ・ Valve VL6: Close ・ Valve VL7: Open

  In the first discharge route, the conduit 44 through which the liquid flows is a first section K1, a second section K2, a third section K3, a fifth section K5, and a seventh section K7.

When the second discharge route is employed, the opening / closing of each valve is set as follows.
[Second discharge route]
・ Valve VL2: Close ・ Valve VL3: Close ・ Valve VL4: Open ・ Valve VL6: Close ・ Valve VL7: Open

  In this second discharge route, the conduit 44 through which the liquid flows is a first section K1, a fourth section K4, a fifth section K5, and a seventh section K7.

  The pump PU is operated as necessary. The filtration speed in the water purifier 2 varies depending on the degree of clogging of the permeable membrane. The flow rate and flow rate are adjusted by the pump PU while taking this processing speed into consideration. The pump PU and route selection are adjusted so that the generation efficiency of the permeated liquid WR is increased.

  This water purification system 40 can be operated as follows. Water (raw solution) to be treated by the water purifier 2 is stored in the liquid storage tank 42. Preferably, the liquid storage tank 42 is a processing tank for charging and stirring the nucleating agent.

  When processing the undiluted | stock solution WG of this liquid storage tank 42 with the water purifier 2, the said circulation route or the said 1st discharge route is employ | adopted. When these routes are adopted, the permeated liquid WR is generated.

  When the process by the water purifier 2 is performed in the first discharge route, all the concentrated liquid WC is discharged from the external discharge port 46. That is, so-called waste water increases. Therefore, the above circulation route is adopted from the viewpoint of saving water. In this circulation route, the concentrated liquid WC returns to the liquid storage tank 42. Therefore, this concentrated liquid WC is reused as the stock solution WG.

  By adopting the circulation route, the concentration of foreign matter increases in the stock solution WG of the liquid storage tank 42. In the second discharge route, the stock solution WG having a high foreign matter concentration can be discarded without going through the water purifier 2. Therefore, clogging of the permeable membrane of the water purifier 2 is effectively suppressed. Moreover, since the excessively contaminated concentrated liquid WC is suppressed from flowing into the water purifier 2, the cleanliness of the permeated liquid WR can be increased.

  As described above, preferably, the liquid storage tank 42 is nucleated. Examples of the nucleating agent used at this time include a ferric chloride-based nucleating agent, a nucleating agent using Bacillus natto, and a polyaluminum chloride-based nucleating agent. Considering the influence on the human body, the polyaluminum chloride nucleating agent is not suitable for the treatment of drinking water. In the nucleating agent using Bacillus natto, the generated floc has viscosity. Therefore, there is a concern about clogging of the permeable membrane. From these viewpoints, a second ferric chloride-based nucleating agent is preferable when filtering for drinking water is performed.

  A known valve such as a gate valve, a globe valve, a ball valve, or a butterfly valve can be used as the valve. In addition to opening and closing, a valve capable of adjusting the flow rate may be used.

  The apparatus and system described above can be applied to water purification.

DESCRIPTION OF SYMBOLS 2 ... Water purifier 4 ... Permeation | transmission unit 6 ... Body 8 ... Flow path formation body 10 ... Guide member 14 ... Inner cylindrical body 16 ... Outer cylindrical body 18 ... -Spacer 30 ... Permeation unit 40 ... Water purification system 42 ... Liquid storage tank 44 ... Pipe line 46 ... External outlet m1 ... Membrane member r1 ... Channel r2 ... Permeate flow path S1 ... Spiral gap x1 ... Inlet y1 ... Outlet z1 ... Filtrate outlet x2 ... Channel inlet y2 ... Channel outlet VL2, VL3 , VL4, VL6, VL7 ... Valve PU ... Pump WG ... Stock solution WC ... Concentrated liquid WR ... Permeated liquid

Claims (7)

A transmission unit capable of transmitting liquid and a body capable of accommodating the transmission unit;
The transmission unit includes a flow path forming body that is spirally arranged while forming a spiral gap, and a guide member that secures the spiral gap while holding the flow path forming body in a spiral shape. And
The body has an inlet, an outlet, and a filtrate outlet;
The flow path forming body includes at least a part of a flow path that is a hollow portion, a flow path introduction port that communicates with the flow path, a flow path discharge port that communicates with the flow path, and a wall surface of the flow path. And forming a film member,
At least a part of the membrane member is a permeable membrane,
The undiluted solution that has flowed into the flow path from the flow path inlet through the flow inlet, passes through the permeation membrane and flows out from the filtrate flow outlet, and the flow through the flow path discharge opening. A water purifier separated into concentrated liquid discharged from the outlet. The flow path of the flow path forming body is formed by a sealing member and the film member attached to the sealing member,
The water purifier according to claim 1, wherein the sealing member is spirally held by the guide member. A spiral assembly including the flow path forming body and the guide member is formed,
The helical assembly has an upstream surface and a downstream surface;
The flow path inlet is provided on the upstream surface,
The flow path outlet is provided on the downstream surface,
The upstream surface is sealed by a water stop member except for the flow path inlet,
The water purifier according to claim 1 or 2, wherein the downstream surface is sealed by a water stop member except for the flow path outlet. The flow path forming body has an inner cylindrical body at its inner end, and the flow path forming body has an outer cylindrical body at its outer end,
The inner cylindrical body has an inner cylinder end opening and an inner cylinder side opening, the inner cylinder end opening serves as the flow path inlet, and the inner cylinder side opening is the flow path. Communicated with
The outer cylindrical body has an outer cylinder end opening and an outer cylinder side opening, the outer cylinder end opening serves as the flow path discharge port, and the outer cylinder side opening is the flow path. The water purifier according to claim 1, wherein the water purifier is in communication with the water purifier. The flow path of the flow path forming body is formed by a first sealing member, a second sealing member, and a film member attached to these sealing members,
As the guide member, a first guide member and a second guide member are provided,
The first sealing member is spirally held by the first guide member;
The water purifier according to any one of claims 1 to 4, wherein the second sealing member is spirally held by the second guide member. A spacer is provided on the side surface of the transmission unit,
The first edge of the spacer is in contact with the first guide member,
The water purifier according to claim 5, wherein a second edge portion of the spacer is in contact with the second guide member. It has the water purifier according to any one of claims 1 to 6, a liquid storage tank, and a pipe line,
The pipeline is
An external outlet,
A first pipeline system connecting the outlet of the liquid storage tank and the inlet of the water purifier,
A second pipeline system connecting the outlet of the water purifier and the external outlet;
Without passing through the water purification device 2, a third pipeline system connecting the outlet of the liquid storage tank and the external outlet;
A fourth line system connecting the outlet of the water purifier and the inlet of the liquid storage tank and a valve;
A water purification system that can be switched to the following three routes.
(1) A circulation route that returns from the liquid storage tank to the liquid storage tank via the water purifier.
(2) A first discharge route from the liquid storage tank to the external discharge port via the water purifier.
(3) A second discharge route from the liquid storage tank to the external discharge port without passing through the water purifier.

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