JPH11253934A - Water purifier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water purifier in which water is discharged outside without being retained in a case even when leaked from an air brake valve during draining. SOLUTION: In a water purifier 10, a drain valve 20 and an air brake valve 56 are opened by the change of water pressure in a cartridge 26 during draining. As a result, air is introduced from the air brake valve 56 into the cartridge 26, and water is discharged from the drain valve 20. In this process, when a faucet is operated slowly at a pressure close to a set pressure, water is occasionally ejected from the drain valve 56. The ejected water enters a space between the cartridge 26 and an outer case 12 and reaches a base material 14. The water is led from a hole part 70 formed in the base material 14 to the drain valve 20 through a drain box 72 and a hose 74 and discharged outside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water purifier having a structure in which water sent from a faucet by a hose is passed, filtered, and returned to the faucet.

[0002]

2. Description of the Related Art In recent years, there has been an increasing demand for safe drinking water, and water purifiers have been used so that safe drinking water can be obtained effectively even in regions and periods where the water quality is relatively poor. .

For example, a solid filter such as red rust in tap water is rubbed with a prefilter provided in front of a water purification cartridge, and when the solid filter becomes clogged, the prefilter is replaced with a new one to prevent the water purification cartridge from being clogged. 2. Description of the Related Art A filter-type water purifier that removes impurities in water with an activated carbon layer or the like and then scrapes bacteria with an ultra-fine filter such as a hollow fiber membrane is known.

On the other hand, a two-way type water purifier in which a water purifier main body and a water tap are connected by a water outlet hose and a water inlet hose does not have a restriction that the water purifier main body is attached to the faucet, so that high performance can be easily achieved. In addition, it is convenient and popular because purified water can be obtained from a tap.

[0005]

Although there are many water purifiers that exhibit excellent water purifying performance, solid components such as red rust contained in tap water stop inside the water purifier as the filtration function is improved. If the solid component is present in the water purifier for a long time, it becomes a nutrient for bacteria that have entered the water purifier for some reason, and there is a possibility that the bacteria may propagate.

As a countermeasure, a water draining mechanism is provided in the water purifier to drain water from the inside of the water purifier when not in use. In other words, the water purifier is provided with a drain valve and an air break valve, and when the water pressure inside the water purifier falls below a set pressure, the water drain valve and the air break valve open, and air is introduced from the air break valve into the water purifier, The internal water is configured to be led to the outside from the drain valve.

[0007] By configuring the water purifier in this way, water is led out to the outside when not in use, thereby preventing the growth of bacteria.

However, when the faucet of the water supply is slowly opened and closed, water may leak from the drain valve or the air break valve near the set pressure. If this water stays inside the case of the water purifier, it may cause mold and an unpleasant odor.

Accordingly, it is an object of the present invention to provide a water purifier that is drawn out without staying inside the case of the water purifier even if water leaks from the drain valve or the air break valve.

[0010]

According to the first aspect of the present invention, there is provided a cartridge having a filter member disposed therein, a base member to which the cartridge is detachably connected, and from which raw water and filtered water flows in and out. A casing surrounding the base member and accommodating the cartridge therein; an air break valve provided at the top of the cartridge for opening and closing by a change in water pressure inside the cartridge to introduce air into the cartridge; and an air break valve provided on the base member. A drain valve that opens and closes due to a change in water pressure inside the cartridge, and that guides water inside the cartridge to the outside;
It is characterized by having.

The operation of the first aspect of the present invention will be described. When the water pressure of the cartridge falls below the set pressure by closing the water tap, the drain valve and the air break valve are opened, and air is introduced into the cartridge from the air break valve, and the inside of the cartridge is released. Water is drawn out from the drain valve. At this time, if the faucet is opened and closed slowly, water may leak from the drain valve or the air break valve when the water pressure inside the cartridge approaches the set pressure. The leaked water reaches the base member from the gap between the cartridge and the casing, and stays in the casing. The accumulated water is immediately discharged to the outside by the drainage means, so that it does not cause mold or unpleasant odor.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a water purifier according to the present invention will be described with reference to FIGS.

FIG. 2 shows a water purifier 10 according to this embodiment. A cylindrical outer case 12 constituting an outer frame of the water purifier 10
The base of the disk-shaped base material 1 formed of a resin material
4 is fixed to the outer case 12 made of resin in a watertight manner. As shown in FIG. 3, the base material 14
A water inlet passage 16 is formed extending from the portion near the outer periphery to the outer periphery side.
The water hose 96 from the faucet unit 62 attached to the outlet 0 is connected (see FIG. 1).

The base member 14 has a base member 1
A water outflow passage 22 extending from the center of the water supply passage 4 to the outer peripheral side in parallel with the water inflow passage 16 is formed. At an end of the water outflow passage 22, a water inlet for removing water purified by the water purifier 10 from the water purifier 10. The hose 98 will be connected.

Further, a ring-shaped rubber pedestal 18 is attached to the lower side of the outer case 12 and the base member 14. In the hollow part of the pedestal 18, the water inlet passage 1
6. Drain valves 19, 2 for draining water from the water discharge passage 22
0 is formed. The drain valves 19 and 20 are configured to open and close according to the water pressure of the passages 16 and 22, respectively, and are set to open when the water tap is closed.

A hole 70 is formed in the bottom surface of the base member 14, and a drain box 72 is provided below the hole 70. The drain box 72 is connected to the drain valve 20 by a hose 74.

A cartridge 26 is provided inside the outer case 12.
Is stored. The cartridge 26 has a resin cartridge case 28 formed in a cylindrical shape and having a bottom wall 28A integrally provided on the lower side. This bottom wall 28A
Have a circular shape and a flow path 30 inside each.
Fitting projections 30 and 32 having A and 32A are formed, respectively. The fitting projections 30 and 32 are fitted into holes 33 and 35 formed at the ends of the water inlet passage 16 and the water outlet passage 22 of the base member 14, respectively. further,
O-rings 34 are mounted on the outer peripheral surfaces of the fitting projections 30 and 32 so that water does not leak from the fitting portions.

A hollow fiber membrane module 36 having a large number of built-in hollow fiber membranes and formed in a cylindrical shape is disposed below the inside of the cartridge case 28. The hollow fiber membrane module 36 is supported by a bracket 40 fitted to the cartridge case 28, and is provided between the hollow water membrane module 36 and the inner peripheral surface of the cartridge case 28.
9 are formed.

Above the hollow fiber membrane module 36 in the cartridge case 28, a ring-shaped sintered filter 42 having fine holes therein is provided. In a cylindrical space above the sintered filter 42, a first filter medium 44 formed of granular activated carbon and a second filter medium 46 formed of fibrous activated carbon are sequentially arranged. I have. That is, the first filter medium 44 and the second filter medium 46 are supported by the sintered filter 42.

At the center of the filter media 44, 46, a condensate pipe 54 extending vertically is arranged. This condensing pipe 54
A through-hole 54A is formed in the lower part of. That is,
The water that has passed through the second filter material 46 falls into the condenser 54,
Water is fed into the hollow fiber membrane module 36 formed in a cylindrical shape through the through hole 54A.

On the other hand, a resin-made cartridge cap 58 is fixed to the upper portion of the cartridge case 28 by ultrasonic bonding or the like. The cartridge cap 58 has an air break valve 56 in which a ball 56A is disposed so as to be vertically movable and has a hole 56B penetrating upward.
is set up. Further, a cover member 52 is screwed into a screw portion 51 formed at the upper end of the outer case 12.

With such a configuration, the water that has entered the water purifier 10 through the water inlet passage 16 is supplied to the flow passage 30A of the fitting projection 30.
After flowing through the cartridge case, the outer peripheral surface of the hollow fiber membrane module 36 disposed below the cartridge 26 and the cartridge case 2
8 will flow into the water passage 29 between the inner peripheral surface 8 and the inner peripheral surface.

Thereafter, the water flows into the sintered filter 42 so as to enter, and comes out from the upper surface of the sintered filter 42. At this time, solid components such as red rust in the water are filtered. As the filtered water passes through the first filter medium 44 and the second filter medium 46, trihalomethane and chlorine are further removed by the first filter medium 44 and the second filter medium 46 is removed. Removes chlorine and musty odor.

The water filtered by the second filter medium 46 enters the condenser pipe 54 from the upper end of the condenser pipe 54, passes through the condenser pipe 54, and further passes through the through hole 54A.
The bacteria enter into 6 and are removed.

Finally, the water that has passed through the bracket 40 passes through the flow passage 32A of the fitting projection 32 and is taken out of the water discharge passage 22. That is, when water flows into the water purifier 10 from the water inlet passage 16, the filtered water is sent out from the water outlet passage 22.

Next, the operation of the water purifier 10 according to the present embodiment will be described. First, drainage will be described. When the water pressure inside the water purifier 10 is reduced by closing a water tap or the like, the drain valve 20 and the air break valve 56 are opened. As a result, air is introduced into the cartridge 26 from the air break valve 56 and the cartridge 2
6 inside (filter materials 44 and 46, hollow fiber membrane module 36
, Etc.) is discharged to the outside from the drain valves 19, 20 via the water inlet passage 16 and the water outlet passage 22.

However, for example, if the operation of opening the faucet is performed slowly, the air break valve 56 will close at the set pressure.
The water may reach the air break valve 56 before the ball 56A of this type is seated on the valve seat of the hole 56B. In this case, a small amount of water spouts from the hole 56B.

The jetted water flows down between the cartridge case 28 and the outer case 12 and reaches the base member 14.
Here, it flows into the drain box 72 from the hole 70 provided in the base member 14. The water that has flowed into the drain box 72 is guided to the drain valve 20 by a hose 74 and is led to the outside.

The water leaking from the drain valves 19 and 20 leaks to the outside, so that there is no problem. As described above, in the water purifier 10 of the present embodiment, the hole 70 is provided in the base member 14, the drain box 72 is provided below the hole 70, and the drain box 72 and the drain valve 20 are connected to the hose 74. Therefore, the water spouted from the air break valve 56 does not stay on the base member 14 and is drawn out of the drain valve 20 through the drain box 72.

[0030]

According to the first aspect of the present invention, water jetted from the air break valve can be led out without staying in the casing, and mold is generated at the bottom of the casing. Can be prevented.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a water purifier according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of the water purifier according to the embodiment of the present invention.

FIG. 3 is a sectional view taken along line 3-3 in FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Water purifier 12 Outer case (casing) 14 Base material (base member) 20 Drain valve 26 Cartridge 56 Air break valve 70 Hole (drainage means) 72 Drainage box (drainage means) 74 Hose (drainage means)

Claims (1)

[Claims] 1. A cartridge in which a filter material is disposed, a base member to which the cartridge is detachably connected, and from which raw water and filtered water flows in and out, and which surrounds the base member and accommodates the cartridge therein. A casing, an air break valve provided on the upper portion of the cartridge, which opens and closes by a change in water pressure inside the cartridge, and introduces air into the cartridge; and an air break valve provided on the base member, which opens and closes by a change in water pressure inside the cartridge. A water purifier, comprising: a water drain valve for leading water inside a cartridge to the outside; and a discharge unit for discharging water retained in the casing to the outside.