JP2009233577A - Water purifier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water purifier which makes it possible to easily perform exchange work in a short time without making accumulated water overflow and wet the surroundings of the water purifier when exchanging the cartridge of a filter medium or a filter membrane. <P>SOLUTION: In the water purifier for performing treatment in a pretreatment cartridge 40 for filtering water by activated carbon and a filter and a membrane filtration cartridge 15 for performing the membrane filtration treatment by a hollow fiber membrane, a reverse osmosis membrane or a nano filter membrane, the pretreatment cartridge 40 and the container body of the membrane filtration cartridge 15 are connected at the bottom parts of the respective containers, while discharge lines for discharging the accumulated water inside the container from the connection part to the outside of the system of the water purifier are provided, and the respective water discharge lines are connected by a three-way switching valve 24. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a water purifier. More specifically, in a water purifier that manufactures purified water by treating raw water such as tap water with a filtration cartridge, when the cartridge reaches the end of its life, it is easy to replace the cartridge without spilling stagnant water in the container. It is related with the water purifier which can do.

  There are various types of water purifiers that purify raw water such as tap water, such as those that are directly attached to the faucet, those that are installed in the kitchen, those that are stored and installed inside the kitchen, and alkaline ion water purifiers that perform electrolysis. A water purifier is used. Moreover, as a purification means incorporated in the water purifier, a purification treatment cartridge in which activated carbon and a microfiltration level hollow fiber membrane are combined is generally used.

  Water purifiers with a plurality of purification treatment cartridges attached to enhance filtration capability and water purifiers using reverse osmosis membranes with high filtration accuracy have also been proposed. Such a water purifier needs to be replaced with a new cartridge when the life of the cartridge is reached.

  For example, Patent Document 1 describes a water purifier in which a wind filter made of non-twisted yarn, activated carbon and a hollow fiber membrane, and a reverse osmosis membrane are incorporated, and a cylindrical container containing each of them is a casing containing a water storage tank or the like. There is disclosed a water purifier that is attached in a state of being erected on the outside of the container and can be exchanged by removing the lid on the upper part of the filter medium and filter membrane in the container.

  However, if a storage container such as a filter medium is arranged outside the water purifier main body as in this document, not only the appearance of the entire apparatus deteriorates, but also when the filter medium or filter in the container is replaced, There was concern that the remaining water would spill and the area around the water purifier would become dirty.

  For this reason, as a water purifier that has taken measures to prevent water from spilling around when the cartridge is replaced, a technique in which a base is provided around the filter housing means as disclosed in Patent Document 2 is disclosed. Since the accumulated water spills and accumulates at the base at the time of replacement, it is inconvenient because it is necessary to throw away the accumulated water. If the accumulated water is not thrown away, various germs grow in the accumulated water, which is not hygienic.

Further, Patent Document 3 proposes a method of draining water in the housing case by installing a drain plug on the bottom surface of the housing case and removing it, but even in this case, it remains in the housing case. If there is pressure, the drain plug is hard and difficult to remove, and when draining it is necessary to receive residual water with a bucket, so it is difficult to say that it is a convenient water purifier.
Japanese Patent Laid-Open No. 7-24446 Japanese Patent Laid-Open No. 10-156345 JP 7-328608 A

  Therefore, in the water purifier, there has been a problem that the cartridge must be replaced without leaving residual water in the water passage or the water purifier when the cartridge is replaced in order to prevent the propagation of various bacteria. In particular, when the supply of raw water is obtained directly from the faucet, the water purifier itself cannot be moved much, and when the cartridge is replaced, the inflow of water from the faucet is suppressed and water-tightly connected It must be discharged without leaving water from the waterway.

  In order to solve the above problems, the present invention provides a compact and easy-to-use water purifier that can be easily replaced in a short time without getting wet with residual water when replacing the cartridge. With the goal.

In order to achieve the above object, the present invention adopts the following configuration.
That is,
A raw water solenoid valve to stop the flow of the supplied raw water,
A pretreatment section through which raw water that has passed through the raw water solenoid valve passes;
A membrane filtration unit that obtains filtered water by filtering the pretreated raw water that has passed through the pretreatment unit;
A cartridge drainage line in which the pretreatment part and the membrane filtration part are connected at the bottom of each;
A cartridge drain valve connected to the cartridge drain line and opening the cartridge drain line when the raw water solenoid valve stops the flow of the raw water;
A flow meter for measuring the flow rate of the filtered water;
An antibacterial unit for obtaining metal ion-containing filtered water by eluting metal ions into the filtered water according to the received control signal;
A control unit that outputs the control signal to the antibacterial unit based on the measurement value of the flow meter,
A water storage tank for storing the metal ion-containing filtered water;
A water supply pump provided on the downstream side of the water storage tank;
A water supply line for supplying the metal ion-containing filtered water in the water storage tank from the water purification nozzle to the outside via the water supply pump;
A water purifier having a bypass line disposed in the middle of the water supply line and leading to the water surface of the water storage tank is provided.

  According to the present invention, since the container main body for storing the cartridge is provided with a line for discharging the residual water in the container to the outside of the water purifier system, when replacing the pretreatment cartridge or the membrane filtration cartridge, the container Replace cartridges safely and easily in a short time, without worrying about residual water overflowing and water adhering to the electrical system inside the water purifier or spilling outside the water purifier and contaminating the surroundings. be able to.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited to the following embodiments.

  Drawing 1 is a figure showing one embodiment of composition of a water purifier concerning the present invention, and a water treatment process. FIG. 2 is an assembled perspective view of the water purifier.

  As shown in FIG. 1, for example, the configuration of the water purifier 100 according to the present embodiment branches from the water pipe 1 at the stop cock 7 and uses the tap water in the water purifier. The strainer 8, the flow control valve 9, and the raw water solenoid valve 10 form an integral structure and are connected to each other via the stop cock 7 and the pressure hose 5.

  The raw water solenoid valve 10 branches the line in two directions, and one side drains the tap water from the relief valve 22 to the outside of the water purifier 100 through the drain line A (25). The other reaches the water storage tank 18 from the pretreatment cartridge 40 through the membrane filtration cartridge 15 and the antibacterial unit 70.

  Further, a flow meter A (14a) is provided between the pretreatment cartridge 40 and the membrane filtration cartridge 15, and a flow meter B (14b) is provided between the membrane filtration cartridge 15 and the antibacterial unit 70.

  The pretreatment container 40a for loading the pretreatment cartridge 40 has a substantially cylindrical shape with a bottom, and a flow path is formed by mounting the pretreatment container lid 40b after the pretreatment cartridge 40 is stored. Further, the pretreatment container lid 40b is detachably fixed to the pretreatment container 40a via an O-ring (not shown).

  The membrane filtration container 15a for loading the membrane filtration cartridge 15 and the membrane filtration cartridge lid 15b also have the same structure as the pretreatment unit, and these containers are connected at the bottom to form the cartridge drain line 27. is doing.

  Further, the concentration line 45 of the membrane filtration cartridge 15 is connected to the drainage line A (25) via the constant flow valve 23, and the overflow line 16 of the water storage tank 18 is also connected to the drainage line A (25). 18 has a water level sensor 30.

  Each of the three-way switching valve 24 is connected to a water storage tank drain line 18a attached to the lowermost part of the water storage tank 18, a cartridge drain line 27, and a drain line B (26), and the drain line B (26). Is open to the outside of the system.

  A water supply pump 19 is branched from the water storage tank drain line 18 a and a water purification nozzle 20 for supplying membrane filtrate water to the outside is connected by a water supply line 60. Further, a bypass line 21 is provided between the water supply pump 19 and the water purification nozzle 20. The water purifier 100 is formed.

With reference to FIG. 1 and FIG. 2, the water purifier 100 of this embodiment is demonstrated in detail.
When a switch (not shown) attached to the external part of the water purifier 100 is turned on, the raw water electromagnetic valve 10 opens and the tap water flows into the water purifier. At this time, if the water pressure of the relief valve 22 is set to 0.4 MPa, for example, the relief valve 22 is opened at a water pressure higher than that, and the tap water is discharged from the drainage line A (25) to the outside of the water purifier 100. Therefore, a water pressure higher than the set water pressure is not applied to the downstream side of the raw water solenoid valve 10, and water leakage or breakage of the water passage can be prevented.

  Further, foreign matter in the tap water and lump of iron rust are captured by the wire mesh of the strainer 8, so that the valve seats of the raw water electromagnetic valve 10 and the relief valve 22 are not damaged or foreign matter is not caught. The size of the wire mesh is preferably in the range of 80 to 150 mesh, and the material is preferably made of SUS. Since the wire mesh portion (not shown) is detachably attached to the housing of the strainer 8, it can be removed and cleaned when the wire mesh becomes clogged.

  The other side of the raw water solenoid valve 10 communicates with the pretreatment cartridge 40 via the hose 17. The pretreatment cartridge 40 is filled with a cylindrical filter 13 having an average pore diameter of 0.1 to 10 μm and the silver-impregnated activated carbon 12. The raw water passes through the filter 13 and the silver impregnated activated carbon 12 in the pretreatment section.

  The filter layer used here is not particularly limited as long as the average pore diameter is 0.1 to 10 μm, and may be any of a pleat type, a wind type, a depth type, etc., and the material is also particularly limited. Any of polypropylene, polyester and the like may be used.

  Moreover, it is preferable that the minimum of the density | concentration of the silver ion in water after passing the silver impregnated activated carbon 12 to be used shall be 5 microgram / L. This is because the suppression of the growth of general bacteria can be expected greatly, and the reason for setting the upper limit to 100 μg / L or less is that the silver ion concentration is not a management item in Japanese tap water quality standards, but WHO ( According to the World Health Organization guidelines, “It is desirable to set it to 100 μg / L or less.” Also, in the water quality standards for safe drinking water regulations stipulated by the USEPA (United States Environmental Protection Agency), the same as WHO. 100 μg / L or less. This is because it is stipulated.

  If the upper limit is determined by water quality standards by each country / region, that value is the upper limit. In addition, the silver ion concentration prescribed | regulated by this embodiment is the numerical value measured with the ICP emission-spectral-analysis apparatus.

  The shape of the silver impregnated activated carbon 12 may be any of powder, granule, fiber and the like. The lifetime of the pretreatment cartridge 40 is measured and displayed by the flow meter A (14a).

  Furthermore, if the check valve 11 is installed upstream of the pretreatment cartridge 40, it is more preferable because a filter medium such as activated carbon does not flow out even if a negative pressure is applied to the piping.

The raw water that has passed through the pretreatment cartridge passes through the membrane filtration cartridge 15.
The separation membrane used in the membrane filtration cartridge 15 having a reverse osmosis membrane (hereinafter referred to as RO membrane) or nanofiltration membrane (hereinafter referred to as NF membrane) used in the present embodiment has a desalination rate of 93% or more. (Evaluation conditions NaCl concentration: 500 mg / L, operating pressure: 0.1 MPa) RO membrane or desalination rate is 5% or more and less than 93% (Evaluation conditions NaCl concentration: 500 mg / L, operating pressure: 0.1 MPa) An NF film can be selected and used.

  In the case of the RO membrane, a polymer material such as cellulose acetate, cellulose-based polymer, polyamide, and vinyl polymer can be used as a separation membrane material having such performance. In the case of an NF film, a polyamide-based, polypiperazine amide-based, polyester amide-based, or a water-soluble vinyl polymer crosslinked can be used. Typical RO membranes include cellulose acetate-based or polyamide-based asymmetric membranes, and composite membranes having a polyamide-based active layer. Among them, the surface layer of the polyamide-based active layer is coated with polyvinyl alcohol. The composite membrane is preferable because it has high exclusion performance, high water permeability, and high contamination resistance.

  As the shape of the separation membrane, both the RO membrane and the NF membrane are preferably flat membranes or hollow fiber membranes. For example, the separation membrane has a thickness of 10 μm to 1 mm, and in the case of a hollow fiber membrane, the outer diameter is 50 μm to 4 mm. It is preferable to be in the range.

  Moreover, the hollow fiber membrane is a hollow membrane having a pore diameter of about 0.1 μm on the outer wall, and the pore diameter is larger than that of the RO membrane or NF membrane. This has the advantage that the amount of water that can be treated is large.

  RO membranes and NF membranes are available in the form of spiral, pleated, plate-and-frame, and disk-type discs when the separation membrane is a flat membrane. Has a cylindrical shape in which hollow fiber membranes are bundled in a U shape or I shape and stored in a container, but any cartridge shape may be used in this embodiment. These membrane filtration cartridges 15 are preferably capable of being operated at a low pressure from the viewpoint of reducing running costs.

  Moreover, although the film | membrane to be used can be selected suitably according to the state of the raw | natural water supplied to a water purifier, it is preferable to use a NF film | membrane from the point which can remove a dissolved substance selectively and is easy to adjust to the target water quality. .

  If the desalination rate of monovalent ions is within the range of 10 to 93% using the selective removal capability of the NF membrane, the tap water after passing through the membrane filtration cartridge 15 is divalent such as calcium ions and magnesium ions. It becomes water containing moderate mineral components and can supply delicious water.

  In order for water to pass through the filtration membrane, a certain level of water pressure is required. However, a constant flow valve 23 may be provided in the concentration line 45 of the membrane filtration cartridge 15 to control the flow rate of the concentrated water. The water that has passed through the membrane filtration cartridge is called filtered water.

  The antibacterial unit 70 used in the present embodiment has two plate-like electrodes arranged facing each other in a form along the flow of the membrane filtration treated water from the inlet to the outlet, and the electrodes are silver alone, silver and copper It is made of a metal material containing a metal that is a source of antibacterial metal ions, such as an alloy of silver and an alloy of silver and zinc. Therefore, when a voltage is applied to both electrodes, antibacterial metal ions such as silver ions are eluted from the anode side. The metal ions eluted in the filtered water are preferably silver ions and copper ions because they have high antibacterial ability and are effective in extremely small amounts, and silver ions are particularly effective in that the antibacterial effect is effective against the most various bacteria. preferable. In the following explanation, explanation is continued with silver ions, but it does not mean to exclude other metal ions.

  The antibacterial unit 70 is controlled so that a current flows between the electrodes in accordance with the flow rate of the filtrate filtered with the flow meter B (14b). Specifically, when the flow rate of membrane filtration water is large, control is performed to increase the current and increase the elution amount of silver ions, and when the flow rate is small, the current is decreased and the elution amount of silver ions is decreased. More specifically, a control signal that controls the amount of current that flows between the electrodes of the antibacterial unit from the output of the flow meter B is generated by the control unit. The antibacterial unit 70 receives this control signal and causes a current corresponding to the control signal to flow between the electrodes.

  The control signal may be either voltage or current, and may be either direct current or pulse wave. The control signal may be a signal other than electricity, for example, mechanical force transmission, light, or sound.

  The control unit may be a part that generates a control signal to be sent to the antibacterial unit 70, and may be a control device using an MPU (Micro Processor Unit) and a program, or a flow meter itself.

  Thus, by eluting the silver ions according to the flow rate of the filtrate water, the silver ion concentration in the filtrate water can be made constant even if the flow rate of the membrane filtration treatment water amount fluctuates. Although a predetermined amount of silver ions is eluted, the relationship between the flow rate of filtered water for eluting the predetermined amount of silver ions and the current supplied to the antibacterial unit is one of the filtration characteristics of RO membranes and NF membranes. It is necessary to set appropriately according to the rate.

  This is because silver ions eluted from the silver-impregnated activated carbon 12 are removed by the membrane filtration cartridge 15. That is, [silver ion concentration 5 μg / L to 100 μg / L] = [silver ion concentration after membrane filtration cartridge filtration] + [silver ion concentration eluted from antibacterial unit].

  At this time, since the concentration of silver ions eluted from the antibacterial unit 70 is controlled according to the flow rate detected by the flow meter 14b, it is generally constant but not uniform. Further, since silver ions are difficult to diffuse, the silver ion concentration in the water storage tank 18 can be distributed. The filtered water from which metal ions are eluted is referred to as metal ion-containing filtered water. The filtered water from which silver ions are eluted is also metal ion-containing filtered water. In the following description, the term “silver ion-containing filtered water” may be used. This refers to filtered water from which silver ions having particularly high antibacterial properties are eluted in the metal ion-containing filtered water.

  The silver ion-containing filtered water that has passed through the antibacterial unit 70 is introduced into the water storage tank 18 and stored in the water storage tank until the upper limit sensor 30b installed in the water storage tank 18 senses it. The water purifier 100 of the present embodiment continues operation while water is supplied from the water supply. When the upper limit sensor 30b senses that the water level of the water storage tank has reached a predetermined position, a signal is sent from the upper limit sensor to automatically close the raw water supply valve 10 and stop the operation. In this way, the silver ion-containing filtered water is always filtered and stored until the water storage tank is full.

Next, a method for supplying membrane filtrate to the outside will be described.
When supplying purified water from the water storage tank 18, if a water supply button (not shown) installed outside the water purifier 100 is pressed, the water is supplied from the purified water nozzle 20 by the water supply pump 19.

  A bypass line 21 installed between the water supply pump 19 and the water purification nozzle 20 is located in the upper part of the water storage tank 18, and a part of the purified water is always returned to the water storage tank 18 through the bypass line 21 during water supply.

  Since the inside of the water storage tank 18 is agitated by the reflux from the bypass line to the water storage tank, the silver ion concentration becomes uniform.

  The water supply amount from the water purification nozzle 18 and the recirculation amount of the bypass line 21 may be selected as needed, and the ratio of the water supply amount and the recirculation amount can be arbitrarily set by changing the inner diameter of the bypass line 21. . It is also a preferable aspect to provide an orifice in the bypass line 21.

  If there is no bypass line 21, even if the water supply pump 19 is stopped, if the tip of the water purification nozzle 20 is located below the liquid level of the water storage tank 18, the water storage tank 18, the water supply pump 19, and the water purification nozzle 20. Is maintained in a watertight communication state via the water supply line 60. Therefore, the membrane filtrate in the water storage tank 18 continues to flow out of the water purification nozzle 20 due to the siphon phenomenon.

  However, in the present embodiment, a bypass line 21 is provided between the water supply pump 19 and the water purification nozzle 20, and a space is provided between the bypass line 21 and the water storage tank 18. Therefore, when the water supply pump 19 is stopped, the accumulated water in the water purification nozzle 20 flows back through the bypass line 21 due to its own weight and is returned to the water storage tank 18. At the same time, the inside of the water purification nozzle 20 is replaced with air. For this reason, the membrane filtrate in the water storage tank 18 is not discharged by the siphon phenomenon.

  If water supply continues and the water level in the storage tank 18 falls below the upper limit sensor 30b, the raw water electromagnetic valve 10 opens and automatically starts supplying tap water. A signal is sent if the lower limit sensor 30a senses the water level. The feed water pump 19 is automatically turned off and the supply of the membrane filtrate is stopped, but the operation is continued until the water level reaches the upper limit sensor 30b.

  Moreover, since the overflow line 16 is installed in the water storage tank 18, even if a detection failure occurs in the upper limit sensor 30b, water does not leak from the water purifier 100 onto the sink 3. This overflow water is connected to the concentrated water line 45 and the discharge line from the relief valve 22 to form a discharge line A (25), and is discharged out of the water purifier 100.

Next, the three-way switching valve 24 will be described.
The three valves built in the three-way switching valve 24 are connected to the water tank drain line 18a, the cartridge drain line 27, and the drain line B (26).

Therefore, if the valve connected to the cartridge drain line 27 is closed and the other two valves are opened, the accumulated water in the water storage tank 18 is discharged out of the water purifier 100 from the drain line B (26). be able to.

  As this effect, when the water purifier is not used for a long time, there is a concern that general bacteria grow in the accumulated water in the water storage tank 18, but when the set time (for example, 24 hours) is reached, as described above, the three-way switching valve 24 When the valve connected to the cartridge drain line 27 is closed and the other two valves are opened, the accumulated water in the water storage tank 18 is discharged out of the water purifier 100 from the drain line B (26). This is a preferable form.

  If the water level in the water storage tank 18 becomes lower than the lower limit sensor 30a, the three-way selector valve 24 is automatically closed. The timing of this automatic stop is stopped by a timer after a predetermined time has elapsed after detecting the lower limit sensor 30a. May be. After draining, the raw water supply valve 10 is automatically opened and the supply of tap water is started.

  Further, if the valve of the water tank drain line 18a attached to the lowermost part of the water tank 18 is closed and the other two valves are opened, the accumulated water in the main body container can be drained. Further, if all the valves are opened, the accumulated water in both the water storage tank 18 and the main body container can be drained simultaneously.

  These controls are performed by a series of controls using storage means and MPU (not shown) installed in the water purifier 100. The MPU is a product control means. As described above, the MPU controls the elution amount of silver ions, as well as an operation means for operating the product by clearing the integrated flow rate counter that becomes the cartridge life, or inputting with a switch or the like. The solenoid valve drive means that drives the solenoid valve for water flow and water stop, the flow rate input means that inputs the flow rate data flowing to the product with a flow sensor, etc., and the state input from the operation means is output to the solenoid valve drive means Or the integrated flow rate and instantaneous flow rate are calculated from the flow rate data input from the flow rate input means, and data input / output necessary for the calculation and operation of the timer and data is performed.

  If the water storage tank 18 is not required in the water purifier, the water staying in the container can be discharged out of the water purifier system by attaching an ON / OFF type electromagnetic valve instead of the three-way switching valve 24.

  In this embodiment, the water tank drain line 18a and the cartridge drain line 27 are connected, and the drain line B (26) is provided via the three-way switching valve 24. The reason is that a compact and inexpensive water purifier can be obtained by reducing the number of members. It is for providing and can be said to be a preferable mode.

  That is, the cartridge drain line 27 may be drained out of the system by an ON / OFF type electromagnetic valve, and may not be connected to the drain line 18 by the three-way switching valve 24. The water purifier of the present invention is provided with a cartridge drain valve capable of draining with the cartridge drain line 27 open to the outside of the system. In the above description, the three-way switching valve 24 is a cartridge drain valve because the cartridge drain line can be opened to drain water.

The pretreatment cartridge 40 and the membrane filtration cartridge 15 are replaced when they reach the end of their lives.
This life detection can be set by, for example, the total integrated flow rate. The total integrated flow rate of the pretreatment cartridge 40 is measured by the flow meter A (14a), and the total integrated flow rate of the membrane filtration cartridge 15 is measured by the flow meter B (14b). Further, the lifetime may be set by the usage time of the cartridge by a timer. When it reaches the end of its life, if it is displayed on the outside of the water purifier with an LED or LCD, the deteriorated cartridge will not be used continuously.

Next, a cartridge replacement method will be described with reference to FIG.
As described above, the pretreatment container 40a for loading the pretreatment cartridge 40 has a substantially cylindrical shape with a bottom, and a flow path is formed by mounting the pretreatment container lid 40b after the pretreatment cartridge 40 is stored. Is done.

  The pretreatment container lid 40b is detachably fixed to the pretreatment container 40a via an O-ring (not shown), and the fixing method may be a screw fixing type or a bayonet type. When these fixing methods are used, the pretreatment section lid 40b can be removed with a slight force, so that the cartridge can be easily replaced without contaminating the inside and the surroundings of the water purifier with water.

  Further, the membrane filtration container 15a for loading the membrane filtration cartridge 15 and the membrane filtration cartridge lid 15b also have the same structure as that of the pretreatment section, and the material of these containers is preferably a resin molded product.

  When it is displayed that the cartridge has reached the end of its life, pressing a cartridge replacement button (not shown) installed outside the water purifier closes the raw water solenoid valve 10 and prevents the inflow of tap water. The direction switching valve 24 (cartridge drain valve) is opened. That is, in the present invention, when the cartridge replacement button is pressed, the raw water electromagnetic valve is closed, and the cartridge drain valve opens the cartridge drain line.

  For these operations, a dedicated circuit may be used in which the raw water solenoid valve is closed and the cartridge drain valve is opened by depressing the cartridge replacement button, or the MPU described above detects the depression of the cartridge replacement button. The raw water solenoid valve and the cartridge drain valve may be controlled. At this time, if there is a residual pressure in the cartridge container, the stagnant water is discharged until equilibrium with the atmospheric pressure, so that the problem that the lid is hard and difficult to remove due to the residual pressure is reduced.

  On the other hand, if the residual pressure disappears, the atmosphere does not flow into the container, so that the accumulated water is not discharged any more and may remain in the cartridge. However, when the lid is removed, the inside of the container is released and most of the accumulated water is discharged out of the water purifier system.

  For this reason, even if a new cartridge is inserted, the accumulated water in the container overflows, causing water to adhere to the electrical system inside the water purifier, causing problems, or spilling outside the water purifier and contaminating the surroundings. Disappear. Therefore, the water purifier of the present invention can easily replace the cartridge in a short time.

  The present invention can be suitably used for a water treatment apparatus including a water purifier.

It is a flow figure showing one embodiment of a water purifier concerning the present invention. It is an assembly perspective view showing one embodiment of a water purifier concerning the present invention.

Explanation of symbols

1: Water pipe 2: Piece cheese 3: Sink 4: Water tap 5: Pressure hose 7: Stop cock 8: Strainer 9: Flow control valve 10: Raw water solenoid valve 11: Check valve 12: Silver impregnated activated carbon 13: Filter 14a: Flow meter A
14b: Flow meter B
15: Membrane filtration cartridge 15a: Membrane filtration cartridge container 15b: Membrane filtration cartridge lid 16: Overflow line 17: Hose 18: Water storage tank 18a: Water storage tank drain line 19: Water supply pump 20: Water purification nozzle 21: Bypass line 22: Relief valve 23: Constant flow valve 24: Three-way switching valve 25: Drain line A
26: Drainage line B
27: Cartridge drain line 30: Water level sensor 30a: Water level lower limit sensor 30b: Water level upper limit sensor 40: Pretreatment cartridge 40a: Pretreatment cartridge container 40b: Pretreatment cartridge lid 45: Concentrated water line 60: Water supply line 70: Antibacterial unit 100 : Water purifier

Claims (5)

A raw water solenoid valve to stop the inflow of the supplied raw water,
A pretreatment section through which raw water that has passed through the raw water solenoid valve passes;
A membrane filtration unit that obtains filtered water by filtering the pretreated raw water that has passed through the pretreatment unit;
A cartridge drainage line in which the pretreatment part and the membrane filtration part are connected at the bottom of each;
A cartridge drain valve connected to the cartridge drain line and opening the cartridge drain line when the raw water solenoid valve stops the flow of the raw water;
A flow meter for measuring the flow rate of the filtered water;
An antibacterial unit for obtaining metal ion-containing filtered water by eluting metal ions into the filtered water according to the received control signal;
A control unit that outputs the control signal to the antibacterial unit based on the measurement value of the flow meter,
A water storage tank for storing the metal ion-containing filtered water;
A water supply pump provided on the downstream side of the water storage tank;
A water supply line for supplying the metal ion-containing filtered water in the water storage tank from the water purification nozzle to the outside via the water supply pump;
A water purifier having a bypass line arranged in the middle of the water supply line and leading to the water surface of the water storage tank. The water purifier according to claim 1, wherein the metal ions are silver ions. The water purification tank according to claim 1, wherein the cartridge drainage valve is a three-way switching valve that connects a drainage line between the water storage tank drainage line connected to the water storage tank and the cartridge drainage line. vessel. The water purifier according to any one of claims 1 to 3, wherein the pretreatment section is provided with silver-impregnated activated carbon. The water purifier according to any one of claims 1 to 4, wherein a silver ion concentration in the silver ion-containing filtered water is 5 µg / L or more and 100 µg / L or less.

Images