JPH08309158A - Water purifier - Google Patents

Abstract

PURPOSE: To select the degree of purification and to produce a large amount of purified water inexpensively by installing groups of cartridges in upper and lower parts through an intermediate connector and connecting the upper end of a upper step cartridge containing a filter medium by an upper connector and the lower end of a lower step cartridge filled with a treatment agent by a lower connector. CONSTITUTION: Upper and lower step cartridge groups 1, 2 are installed through an intermediate connector 4, the upper step cartridge group 1 is filled with hollow fiber cartridges, and the lower step cartridge group 2 is filled with active carbon. The upper end of the group 1 is connected with an upper connector 3, the lower end of the group 2 is connected with a lower connector 5, and a channel is installed which makes these connectors 3-5 communicate with each other. An outlet 11 for purified water is formed at the end of the upper connector 3, inlets for raw water equipped with a check valve 17 are formed at the ends of the intermediate and lower connectors 4, 5, and raw water is supplied selectively by means of a change-over valve 14. In this way, the degree of purification can be selected by one water purifier.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a commercial water purifier for supplying a large amount of inexpensive, cleaner water to a food service facility, a food industry, etc., which uses tap water.

[0002]

As a water purifier of this type, for household use, an activated carbon cartridge and a hollow fiber cartridge are connected in series, or an activated carbon cartridge and a hollow fiber cartridge which are arranged in parallel are connected in series by piping. , One cylindrical cartridge is filled with activated carbon and hollow fiber, but depending on the application, it may be sufficient to purify water only through the hollow fiber. In some cases, it was necessary to purify water, and there was no one purifier that could select the degree of purified water depending on the application. For example, in the case of eating facilities, high-grade water that has passed through activated carbon is used for direct drinking, but tap water is often used for washing dishes and preparing. . However, in recent buildings and condominiums, there is a problem such as iron rust due to corrosion of piping, and there are cases in which tap water is filtered through a hollow fiber membrane and used. The advent of water purifiers that allow the proper use of purified water has been desired.

[0003] Further, households have a small processing capacity, and even for commercial use, there are various technical difficulties in increasing the size of hollow fiber cartridges. Therefore, there is no one that can easily purify a large amount of water. It was In addition, some of these materials use antibacterial agents, etc. to claim antibacterial properties.
None had a decisive effect on bacterial contamination from the secondary side.

[0004]

Therefore, an object of the present invention is to have the ability to purify several m ^{3 of} tap water per hour and a total of several hundred m ³ of water. Another object of the present invention is to provide a compact, inexpensive commercial water purifier that can prevent bacterial contamination from the secondary side, which can be caused when it is stopped for a long time.

[0005]

In order to achieve the above object, the water purifier of the present invention has a cartridge group in which a plurality of cylindrical cartridges are arranged in parallel with the cylinder axis direction being the vertical direction. At least two stages are connected in the vertical direction via an intermediate connector, the upper cartridge group has a built-in filter medium, the lower cartridge group is filled with a treating agent, and the upper cartridge group has the upper end of each cartridge as an upper part. Connected to the connector, the lower cartridge group connects the lower end of each cartridge to the lower connector,
The upper connector, the intermediate connector and the lower connector are formed with a flow path for communicating the connected cartridges with each other, and an outlet for purified water is provided at an end of the upper connector, and an end of the lower connector and an end of the intermediate connector are provided. Each section is equipped with a raw water inlet with a check valve, and a raw water supply pipe connected to both inlets is equipped with a pressure reducing valve and a switching valve for selectively supplying raw water to either of the inlets. It is characterized by that.

In the above water purifier, the filter medium contained in the upper cartridge group is sealed at both ends by the sealant at the upper end of the upper cartridge in an open state, and at the lower end of the upper cartridge. It is preferable to use a hollow fiber membrane in which the middle portion of the lower portion is bent in a U-shape and the treating agent filled in the lower cartridge group is activated carbon, calcium sulfite, or coral. It is preferable to use one or two or more selected from sand, an ion exchange agent and barley stone.

When the lower cartridge is filled with activated carbon, the adsorption of activated carbon and the catalytic action remove chlorine, mold odor, trihalomethane, etc. contained in tap water. Particle components larger than the small holes (0.1 to 0.2 μm) formed, such as dust, iron rust, and bacteria, are removed. Further, by replacing all or part of the activated carbon in the activated carbon cartridge with calcium sulfite, coral sand, an ion exchange agent, and barite stone, a mineral content is added or heavy metals are removed.

Further, the present invention is characterized in that an ultraviolet lamp for sterilization is provided in the water purification passage of the upper connector. By providing a sterilization ultraviolet lamp in the purified water flow path of the upper connector, it is possible to effectively prevent bacterial contamination from the secondary side which may be a concern when the use is stopped for a long time. That is, during repeated use and stoppage for a long period of time, bacteria invade from the outflow port and grow inside the hollow fiber membrane or in the purified water flow path, so-called reverse contamination of bacteria (secondary contamination). However, if an ultraviolet lamp for sterilization is attached to the water purification channel, even if bacteria invade, it will be killed by the ultraviolet lamp, so that bacteria will not grow on the secondary side of the hollow fiber membrane. Can be prevented.

Furthermore, by providing a pressure reducing valve on the raw water supply pipe, problems such as water leakage caused by abnormal water pressure fluctuations and water volume reduction due to flattening of the hollow fiber membrane can be prevented.
It is designed to be used under stable conditions.

The hollow fiber membrane may be flattened and crushed when a pressure of 4 kgf / cm ² or more is applied. Water pressure is about ² to 3 kgf / cm ^{2 in} ordinary water supply, but in some areas where pumping up in highlands, the water pressure is 7 to 8 k
In some places it reaches gf / cm ² . Even in such an area, the pressure applied to the hollow fiber membrane is not so large at the beginning of use of the water purifier because the water permeability of the hollow fiber membrane is good, but when it becomes clogged, the pressure applied to the hollow fiber membrane increases. The cartridge may be flattened, water may leak from the connecting portion of the cartridge, or the cartridge case may be broken. By providing a pressure reducing valve at the inlet, these troubles can be prevented.

[0011]

EXAMPLES Examples will be described below with reference to the drawings.

FIG. 1 is a front sectional view of a water purifier showing an embodiment according to the present invention, and FIG. 2 is a side sectional view of the water purifier shown in FIG.

As shown in FIGS. 1 and 2, the water purifier according to the present invention has two upper and lower stages, in which a hollow fiber cartridge is arranged in the upper cartridge group 1 and an activated carbon cartridge is arranged in the lower cartridge group 2. An example is shown. Reference numeral 3 denotes an upper connector, 4 denotes an intermediate connector, 5 denotes a lower connector, and male screws are formed at both ends of these connectors, respectively, lids 6, 7, 8 and inlet attachment lids 9, 10 and outlets. The mounting lid 11 is fitted. The raw water supply pipe 12 is provided with a pressure reducing valve 13 capable of supplying raw water to either the inlet mounting lid 9 or the inlet mounting lid 10 and a switching valve 14. A sterilizing ultraviolet lamp 16 fixed to the outlet mounting lid 11 is inserted into the purified water flow path 15 of the upper connector 3. The inlet attachment lids 9 and 10 and the outlet attachment lid 11 have a structure that can be fitted to either the left or right end of the connector.
A check valve 17 is provided at each inlet.

In the figure, reference numerals 18 and 19 denote the flow path of the intermediate connector and the flow path of the lower connector, respectively.

FIG. 3 is a sectional view showing the hollow fiber cartridge used in FIG.

In the hollow fiber cartridge of the upper cartridge 1, as shown in FIG. 3, a hollow fiber bundle 21 made of a semipermeable membrane is bent into a U shape inside a cylindrical body 20 made of a transparent resin, and the hollow fiber is The end outer peripheral surface of the hollow fiber bundle and the end inner peripheral surface of the cylindrical body are sealed with a sealant 22 so that both end surfaces of the bundle are aligned with one end of the cylindrical body. And the U-shaped part is connected to the intermediate connector 4 so that the hollow fiber is filtered from the outer diameter side.

FIG. 4 is a sectional view showing the activated carbon cartridge used in FIG.

As shown in FIG. 4, the activated carbon cartridge of the lower cartridge 2 has a cylindrical body 23 made of a transparent resin filled with activated carbon 24 and mesh plates 25 fitted at both ends. The mesh tray 25 is designed so as not to come off when connected to the connector.

In the water purifier configured as described above, when tap water is supplied from the inlet mounting lid 10, the raw water flow path 19 of the lower connector 5 passes through each activated carbon cartridge of the lower cartridge 2 and the intermediate connector 4 Each hollow fiber cartridge of the upper cartridge 1 through the flow path 18 of
It is filtered by the hollow fiber bundle 21, collected in the purified water flow path 15 of the upper connector 3, and sent out of the purified water through the outlet. When tap water is supplied from the inflow port attachment lid 9 inflow port by the switching valve 14, it enters each hollow fiber cartridge of the upper cartridge 1 via the flow path 18 of the intermediate connector 4, and is filtered by the hollow fiber bundle 21. It gathers in the water purifying passage 15 of the upper connector 3 and is sent out of the water purifier through the outlet. A check valve 17 is attached to each inflow port so that the water in the water purifier does not flow back.

The water purifier can be freely selected in terms of usage, such as connecting it in the middle of the piping of a fixed water supply facility, or connecting it to the tip of the piping and attaching a hose to the outlet.

Further, depending on the space of the place of use and the position of the pipe to be connected, in the cartridge group in which a plurality of cylindrical cartridges in FIG. 1 are arranged in parallel with the cylinder axis direction as the vertical direction, The cartridge group may be laid on its cylinder axis in the horizontal direction. Further, the inlet attachment lids 9 and 10 may be laid horizontally in the same direction as the outlet attachment lid 11, or may be attached on the pedestal or on a wall.

In the embodiment, the water purifier having the above-mentioned configuration is used as one unit, but if other similar units are arranged in parallel and the connectors are connected to each other, the capacity is doubled or tripled. It can be used as a water purifier.

Further, although an example in which a plurality of cylindrical cartridge groups are connected in two stages in the vertical direction via the intermediate connector has been shown, they may be connected in two or more stages.

[0024]

As described above, by using the water purifier of the present invention, one water purifier can be used to select the degree of water purification depending on the application, and there is no fear of bacterial contamination, and a large amount of water can be easily manufactured at a low price. Obtainable. Moreover, since it is compact, it can be installed without modifying existing equipment.

[Brief description of drawings]

FIG. 1 is a front sectional view of a water purifier showing one embodiment according to the present invention.

FIG. 2 is a side sectional view of the water purifier shown in FIG. 1 viewed from the outlet side.

FIG. 3 is a cross-sectional view showing the hollow fiber cartridge used in FIG.

FIG. 4 is a cross-sectional view showing the activated carbon cartridge used in FIG.

[Explanation of symbols]

 1 Upper Cartridge 2 Lower Cartridge 3 Upper Connector 4 Middle Connector 5 Lower Connector 6,7,8 Connector Lid 9,10 Raw Water Inlet Mounting Lid 11 Purified Water Outlet Mounting Lid 12 Raw Water Supply Piping 13 Pressure Reducing Valve 14 Switching Valve 15 Water purification flow path for upper connector 16 Ultraviolet lamp for sterilization 17 Check valve 18 Flow path for intermediate connector 19 Raw water flow path for lower connector 20 Cylinder 21 Hollow fiber bundle 22 Sealant 23 Cylinder 24 Activated carbon 25 Mesh dish

Claims (6)

[Claims] 1. A cartridge group in which a plurality of cylindrical cartridges are arranged in parallel with the cylinder axis direction being the vertical direction and connected in at least two stages in the vertical direction via an intermediate connector, and the cartridge in the upper stage is connected. The group has a built-in filter medium, the lower cartridge group is filled with the treating agent, the upper cartridge group connects the upper end of each cartridge to the upper connector, and the lower cartridge group connects the lower end of each cartridge to the lower connector. The upper connector, the intermediate connector and the lower connector, to form a flow path for communicating between the connected cartridges,
A clean water outlet is provided at the end of the upper connector, and raw water inlets with check valves are provided at the end of the lower connector and the end of the intermediate connector, and the raw water supply pipes connected to these inlets are , A water purifier having a switching valve for selectively supplying raw water to either of the two inlets. 2. The filter medium contained in the upper cartridge group has both ends sealed with a sealant in an open state at the upper end of the upper cartridge and an intermediate portion at the lower end of the upper cartridge. 2. The water purifier according to claim 1, which is a hollow fiber membrane that is filled in a U-shaped bent state. 3. The treatment agent filled in the lower cartridge group is one or more selected from activated carbon, calcium sulfite, coral sand, ion exchange agent and barley stone. The water purifier according to claim 1 or 2. 4. The water purifier according to claim 1, wherein the raw water supply pipe is provided with a pressure reducing valve. 5. The water purifier according to claim 1, wherein an ultraviolet lamp for sterilization is provided in the water purification passage of the upper connector. 6. A cartridge group in which a plurality of cylindrical cartridges are arranged in parallel with the cylinder axis direction as a vertical direction, and the plurality of cylindrical cartridges are arranged in a horizontal direction in the cylinder axis direction. The water purifier according to any one of claims 1 to 5, wherein the water purifier is arranged.