JPH08132070A - Mineral added cartridge and mineral added type water purifier - Google Patents

Abstract

PURPOSE: To provide a mineral added cartridge and a mineral added type water purifier capable of supplying a stable concentration mineral water without being affected by water pressure or water quantity and having long service life. CONSTITUTION: The mineral added cartridge is provided with an external vessel 1 provided with a 1st flow-in opening for a raw water and a 1st flow-out opening 14 for a mineral water and an internal vessel 2 housed in the external vessel 1 and provided with a 2nd flow-in opening and a 2nd flow-out opening, a calcium principal ingredient 10 is loaded in the internal vessel 2 and one or more kinds of natural stones containing a mineral component are loaded in at least a part of space formed between the external vessel 1 and the internal vessel 2. And the mineral added type water purifier mounts the mineral added cartridge.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mineral addition cartridge capable of supplying stable mineral water and a mineral addition type water purifier using the same.

[0002]

2. Description of the Related Art Due to the growing awareness of health and the need for delicious water, a mineral-added water purifier having a mineral-added portion has been attracting attention. Among them, the cartridge type in which the mineral addition portion can be replaced when the mineral component reaches the end of its life has hitherto received attention as the most practical one.

The mineral-added cartridge used in this conventional mineral-added water purifier is formed by simply stacking a calcium agent and mineral natural stone on the cartridge, or
Or, they were mixed and loaded.

[0004]

However, in the conventional mineral-added cartridge, since the calcium agent and the mineral natural stone are simply stacked or mixed and loaded in the cartridge, the influence of the water pressure and the amount of raw water flowing into the cartridge is affected. As a result, there is a problem that a mineral-added water having a stable concentration cannot be obtained. In particular, when the water is closed with the faucet closed, raw water will stay in the mineral addition cartridge, so the mineral components will be eluted to a saturated concentration, and more minerals will be added than necessary. There was a problem. As a result, when re-passing water, mineral water with a high concentration, which is several times higher than that during normal water flow, is discharged. As described above, there is a problem that the mineral is not stably and properly added, and further, the life of the mineral addition cartridge is significantly shortened due to frequent elution of the mineral component to the saturated concentration.

Further, it is difficult to judge the life of the mineral-added cartridge, and there is a problem that the mineral-added cartridge may be replaced or drink water containing almost no mineral component while having a sufficient elution ability. If the life is judged by detecting the concentration with a detection device or the like, the life time can be known, but the size of the water purifier is inevitable and the cost is high.

Therefore, the present invention solves these conventional problems, and an object of the present invention is to provide a mineral addition cartridge which can supply a stable concentration of mineral water which is not affected by water pressure and water amount and which has a long life. And

Another object of the present invention is to provide a method for determining the life of a mineral-added cartridge in which the life is easily and reliably determined and the cost is low.

A further object of the present invention is to provide a mineral-added water purifier capable of continuously supplying a stable concentration of mineral water.

[0009]

In order to achieve the above object, a mineral addition cartridge of the present invention comprises an outer container provided with a first inlet for supplying raw water and a first outlet for discharging mineral water. An inner container, which is housed in the outer container and provided with a second inflow port and a second outflow port, is provided, and the calcium main agent is loaded in the inner container and is formed between the outer container and the inner container. At least a part of the space is loaded with one or more kinds of natural stones containing a mineral component.

The first inlet and the second inlet are opposed to each other, and the outer container and the inner container are arranged with their central axes aligned substantially coaxially, and a winding filter is provided at the first outlet. It is preferable that the raw water that flows in is divided into an inner circumference and an outer circumference of the inner container, combined before the winding filter, filtered by the winding filter, and discharged from the first outlet.

A center hole is provided in the intermediate filter having an outer shape that fits the inner wall of the outer container, and the center hole is fitted into the second outlet, so that a space formed between the outer container and the inner container is formed. It is desirable to divide the first space into a first space and a second space, and to load natural stone into the first space, and to load natural stone balls formed into a substantially constant grain into the second space.

Further, it is suitable to provide a check valve at each of the second inflow port and the second outflow port. It is preferable that the check valve at the second outlet is one of a mortar-shaped nozzle provided at the second outlet and a natural stone ball.

It is desirable that the check valve at the second inlet be an umbrella-type check valve body that covers the second inlet from the inner container side.

It is suitable that the calcium main agent is ionized calcium containing calcium as a main component and at least one or more kinds of mineral components of magnesium, iron, phosphorus, potassium and sodium.

Further, the method for determining the life of the mineral addition cartridge of the present invention detects the pH value of the raw water and the pH value of the mineral water by immersing the pH value in the pH test paper.
It is characterized in that the respective colors of the test papers are compared with each other, and the time when the pH test papers have almost the same color is the end of the life of mineral addition.

Further, the mineral-added water purifier of the present invention is
It is characterized by comprising a connecting portion to which the mineral addition cartridge is mounted.

[0017]

The mineral addition cartridge of the present invention is provided with an outer container and an inner container housed in the outer container. The calcium main agent is loaded into the inner container and the space formed between the outer container and the inner container is provided. Since one or more kinds of natural stones containing a mineral component in at least a part of them are loaded, the ratio of the amount of water passing through the calcium main agent and the natural stone can be appropriately set by fluid resistance, and the mineral components of mineral water are diversified. Can be achieved.

Since the first inlet and the second inlet are opposed to each other and the central axes of the outer container and the inner container are aligned substantially coaxially, the cartridge structure can be simplified.

Further, a center hole is provided in the intermediate filter, the center hole is fitted to the second outlet, and the space formed between the outer container and the inner container is the first space for accommodating the inner container and the second space. The first space is divided into natural spaces, and the first space is filled with natural stones, while the second space is filled with natural stone balls formed into a substantially constant granular shape. The natural stone balls facilitate mixing when the shunts flowing through the merging in the second space.

Further, since a check valve is provided at each of the second inflow port and the second outflow port, the inside of the inner container is shut off by the check valve at the time of water stop, so that the calcium main agent which is easily eluted is retained in the water. It is possible to supply a stable concentration of mineral water without being added to.

Since the check valve at the second outlet is one of the mortar-shaped nozzle and the natural stone ball provided at the second outlet, the natural stone ball can be used also as the valve body of the check valve, and the natural stone can be used. Since the balls are exchanged one after another, it is not necessary to deal with the calcium adhesion of the natural stone balls that are the valve bodies.

Since the check valve at the second inlet is an umbrella-type check valve body in which the second inlet is covered from the inner container side, it is possible to prevent the calcium main agent from leaching out from the second inlet. it can.

Since the main calcium component is ionized calcium containing calcium as a main component and at least one or more kinds of mineral components selected from magnesium, iron, phosphorus, potassium and sodium, it has an antibacterial action or a bactericidal action. There is.

Further, the method for judging the life of the mineral addition cartridge of the present invention detects the pH value of the raw water and the pH value of the mineral water by immersing the pH value in the pH test paper.
It is possible to make a reliable judgment by using an inexpensive pH test paper because the color of each test paper is compared and the color of the pH test paper becomes almost the same when the life of mineral addition is reached. .

Further, since the mineral addition type water purifier of the present invention is provided with the connection portion, the mineral addition cartridge can be mounted.

[0026]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a vertical cross-sectional configuration diagram of a mineral-added cartridge according to an embodiment of the present invention, and FIG. 2 is a main-portion cross-sectional view of an inner container inflow portion when water is stopped,
FIG. 3 is a cross-sectional view of a main part of the inner container inflow port when water is flowing in the embodiment of the present invention. FIG. 4 is a cross-sectional view of a main part of the inner container outlet part when water is stopped in one embodiment of the present invention, and FIG. 5 is a cross-sectional view of a main part of the inner container outlet part when water is passed in the embodiment. It is a figure.

First, the structure of the mineral addition cartridge of this embodiment will be described with reference to FIG. In FIG. 1, 1 is an outer container, which is an upper case 1a, a cap 1b, and a first inlet 1d.
And a lower case 1c having a lower case 1c, and an inner container 2 to be described later loaded with a calcium main agent and members such as natural stones around the inner container 2 are loaded.
It is welded together with c. Reference numeral 2 denotes an inner container housed in the outer container 1, which comprises a case 2a and a cap 2b. A second outlet 2c is provided on the upper portion of the case 2a as shown in FIGS. 4 and 5, and a nozzle 6 is press-fitted into the second outlet 2c. The outlet 6a of the nozzle 6 is formed in a mortar shape, but since the central axes of the outer container 1 and the inner container 2 are aligned substantially coaxially, the second outlet 2c has a vertically upward opening. Has become. Therefore, when the water is stopped, as shown in FIG. 4, one of the natural stone balls 4 loaded in the upper part slides in and the nozzle hole 6c is closed.

The natural stone balls 4 are made of barley stone or the like and are made into a certain granular shape by adjusting the diameter and the like, and are originally loaded so as to function as a mineral addition material, a filtering material, or a mineral component mixing promoting material. However, in the present embodiment, it also serves as a valve body of the check valve that closes the nozzle hole 6c. That is, at the time of water flow, the natural stone balls 4 float up and the nozzle holes 6c are opened, as shown in FIG. 5, and the raw water flows as shown by the arrow E. In this way, the natural stone balls 4 prevent the calcium base agent in the inner container 2 from being melted out in a large amount at the time of water stop and raising the mineral concentration in the mineral water more than necessary, thereby preventing unnecessary elution of the calcium base agent. Since this can be prevented, the life of the mineral addition cartridge can be extended. In this embodiment, since the natural stone balls 4 can also be used as the valve body of the check valve, the structure is simple, and since the natural stone balls 4 are exchanged one after another every time water is passed, the calcium of the natural stone balls 4 that is the valve body is used. There is an advantage that adhesion does not have to be a problem.

A cap 2b welded to the lower end of the inner container 2
2 or 3, the second inlet 2d is provided and the check valve 2e is provided with the umbrella type valve body 5. The umbrella type valve body 5 is an elastic body such as synthetic rubber.
The umbrella type valve body 5 and the second inlet 2d constitute a check valve 2e. That is, since the pressure is anhydrous when the water is stopped, the second inlet port 2d is closed by the elasticity of the umbrella-shaped valve body 5, as shown in FIG. However, due to the water pressure at the time of water flow, the umbrella-shaped valve body 5 is pushed open by the water pressure from the second inflow port 2d and opened as shown in FIG. 3, and the raw water flows into the inner container 2 as shown by an arrow B. To do. In this way, the check valve 2e can prevent the calcium main agent in the inner container 2 from flowing out from the second inlet 2d when the water is stopped.

Next, reference numeral 7 in FIG. 1 denotes a filter on the second inflow port 2d side of the inner container 2, which is made of a non-woven fabric or the like. Similarly, 8 is a filter on the side of the second outlet 2c, which is made of a material such as foam plastic. In the space inside the inner container 2 surrounded by the filter 7 and the filter 8, the calcium main agent 1
0 is loaded. The calcium main agent 10 is water-soluble ionized calcium, which is ionized by giving a high charge to oyster shells and the like. The ionized calcium contains calcium as a main component and at least one or more kinds of mineral components selected from magnesium, iron, phosphorus, potassium and sodium. This calcium base agent 10 exerts a strong antibacterial action or bactericidal action.

Reference numeral 9 is an inflow side filter made of non-woven fabric or the like on the first inflow side 1d of the outer container 1. An intermediate filter 13 has an outer shape that fits into the inner wall of the outer container, and the outer diameter is press-fitted and fixed to the inner diameter of the lower case 1c of the outer container 1. At the same time, the central hole provided in the intermediate filter 13 is fitted into the diameter D3 of the second outlet 2c. By installing this intermediate filter 13,
The space formed between the outer container 1 and the inner container 2 is partitioned into a first space for accommodating the inner container 2 and an upper second space,
While one type or a plurality of types of natural stones are loaded in the space, the natural stone balls 4 formed into a substantially constant granular shape are loaded in the second space. At least a part of the space formed between the outer container 1 and the inner container 2 is loaded with a natural stone containing a mineral component. Since the natural stone ball 4 loaded in the second space needs to function as a valve body of the check valve, it is possible to freely change the position around the winding filter 3 described later. It has been loaded with the. There are two kinds of natural stones in this embodiment, namely, silica sand 11 and coral grains 12. The intermediate filter 13 is made of foamed plastic or the like.

Reference numeral 3 is a spirally wound filter wound around the pipe-shaped skirt 14a extending from the first outlet 14 of the outer container 1 into the outer container 1. The winding filter 3 is composed of a filter cloth sheet or the like. A series of filters such as the winding filter 3 and the intermediate filter 13 are
Silica sand 11 which is a natural stone loaded in the first space between the outer container 1 and the inner container 2, coral grains 12, fine powder of the natural stone balls 4, impurities of the calcium main agent 10 loaded in the inner container 2, etc. It serves to block out and filter out the mineralized water suitable for drinking.

Next, the movement of the water flow around the mineral addition cartridge of this embodiment when raw water is supplied will be described. In FIG. 1, 18 is a raw water supply passage which is a water supply pipe, and S1 is a faucet for opening and closing the water supply pipe. When the faucet S1 is opened, the raw water flows from the arrows A to B of the inflow water channel 19 to reach the first inlet 1d of the outer container 1, and the inner container 2 has an inner circumference and an outer circumference, and the raw water flows in a direction perpendicular to the horizontal arrow C. Is divided into arrows E Raw water in the direction of arrow C passes through silica sand 11 and coral grains 12 contained in the first space formed between the outer periphery of the inner container 2 and the lower case 1c of the outer container 1 as shown by arrow F. , After passing through the intermediate filter 13, the outer container 1
To reach inside the upper case 1a.

On the other hand, the raw water in the direction of the arrow E communicates with the calcium main agent 10 in the inner container 2 and, after containing the mineral component, pushes up the natural stone ball 4 in the mortar-shaped outlet 6a and flows out. , Reaches into the upper case 1a of the outer container 1.

Raw water containing mineral components that has reached the upper case 1a of the outer container 1 after passing through the above-mentioned natural stones and the calcium main agent 10 are passed through and the upper case 1 of the outer container 1 is also passed.
The raw water containing the calcium component, which has reached the inside of a, is joined and mixed while contacting a large number of natural stone balls 4, and homogeneous mineral water is generated. Each of the divided flows can be designed to have different fluid resistance depending on the size of the inner container 2, the amount of the charge, etc., so that the mineral components of the mineral water can be diversified. Further, as described above, the natural stone ball 4 has a function as a mineral material and a filter material, but also has a great function of promoting the mixing of mineral components. The generated mineral water, after passing through the winding filter 3,
As shown by arrow G, the pipe-shaped skirt 14a is communicated with the first
It flows out from the outflow port 14, flows through the outflow path 20 in the direction of the arrow H, and is supplied from the water discharge port.

Next, a mineral addition type water purifier equipped with a mineral addition cartridge will be described. FIG. 6 is a schematic sectional view of a mineral-added water purifier according to another embodiment of the present invention, and FIG. 7 is a flow path configuration diagram of the mineral-added water purifier according to another embodiment of the present invention. When the water faucet S1 is opened and opened, the raw water reaches the three-way valve 21 through the raw water supply passage 18 via the check valve 2e, as shown in FIGS. The mineral addition type water purifier of this embodiment can select two modes, a mineral mode and a water purification mode. In the mineral mode, the three-way valve 21 is switched to connect the raw water supply passage 18 and the inflow water passage 19 to each other. After the raw water passes through the inflow channel 19, the quick opening / closing means 22
The mineral addition cartridge 2 through the connection part equipped with
Inflow to 3. This connecting portion is not only a connecting portion for connecting the flow path, but also a mounting portion for mounting the mineral addition cartridge 23 on the mineral addition type water purifier with one touch. The quick opening / closing means 22 is composed of a valve seat, a valve body, and a spring for urging the valve body. This quick opening / closing means 22 is
In addition to quick attachment and detachment, it is possible to prevent water leakage due to a water hammer when the faucet S1 is suddenly opened and closed.

The mineral water discharged from the mineral addition cartridge 23 to the outflow passage 20 via the upper connection portion is controlled by the constant flow valve 25 to a substantially constant flow rate. Since the elution rate of the mineral components in the mineral addition cartridge 23 is stable, the mineral elution concentration of 23 can be stabilized and made constant in the mineral addition cartridge by making the flow rate almost constant by the constant flow valve 25. The mineral water discharged from the constant flow valve 25 enters the three-way valve 21 again, and the rear communication passage 24
It is introduced into the water purification cartridge 26 through the. The connection part that connects the water purification cartridge 26 and the communication passage 24 is basically the same as the connection part of the mineral addition cartridge 23. The water purification cartridge 26 is provided with a filter material 28 such as activated carbon and a hollow fiber membrane 29, and after purifying the mineral water, the water is discharged from a water outlet through a discharge passage 27.

Next, the water purification mode will be described. At this time, the three-way valve 21 is switched to connect the raw water supply passage 18 and the communication passage 24. In this state, water is not passed through the mineral addition cartridge 23, and the mineral addition cartridge 23 is in a water stopped state. The supplied raw water is purified by the water purification cartridge 26 and then discharged from the water discharge port.

As described above, the mineral addition type water purifier of this embodiment can switch between the mineral mode and the water purification mode, and the mineral water and the water purification can be used as required. Further, since the mineral addition cartridge 23 is provided, it is possible to supply mineral water having a stable concentration.

By the way, in the mineral addition cartridge 23 of the present invention, the inside of the inner container 2 is shut off by the check valve at the time of stopping the water, and it is possible to prevent the calcium main agent 10 which is easily eluted from being added to the water which is staying. By this, it is possible to supply a stable concentration of mineral water, and it is also possible to make a cartridge having a long life. However, if the calcium main agent 10 is used continuously, the life will also come. It is very difficult to judge the life time, and it is necessary to detect the concentration in order to make a reliable judgment, but it is not practical to provide a detection device because the cost is large and the size is large. Therefore, a method of determining the life of the mineral-added cartridge 23 of the present invention that enables easy and reliable life determination will be described.

Mineral addition cartridge 23 of this embodiment
Ionized calcium is used as the calcium base agent 10. However, when the present inventor added it to raw water, the hardness of the mineral water produced and the pH value were found to be experimentally approximately proportional. This can be translated into that the concentration of calcium added to the raw water as mineral water is almost proportional to the pH value. Therefore, in the determination method of the present embodiment, first, the pH value of raw water and the pH value of mineral water are respectively detected by immersing a pH test paper such as a litmus test paper.
Next, the respective colors of the two pH test papers are colorimetrically compared. Then, when the life of the mineral addition cartridge 23 has not come, the pH value is different between the two pH test papers due to the elution of calcium, so that the two have different colors.
However, when the life of the raw water is reached, no new calcium is added to the calcium of the raw water, and the pH value of the raw water is not changed. Therefore, the colors of the two pH test papers are almost the same. When the color of the pH test paper becomes almost the same, it is judged that the life of the mineral addition cartridge 23 has come. As a result, the life of the mineral addition cartridge 23 can be determined reliably, easily and inexpensively without detecting the calcium concentration.

[0042]

The mineral addition cartridge of the present invention is
Since the outer container and the inner container are provided, the calcium main agent is loaded in the inner container, and at least a part of the space formed between the outer container and the inner container is loaded with natural stone, the fluid resistance of each is set. Thus, the ratio of the amount of water passing through the calcium main agent and the natural stone can be appropriately set, and the diversification of mineral components and the concentration setting can be performed.

Since the first inlet and the second inlet are opposed to each other and the central axes of the outer container and the inner container are aligned substantially coaxially, the cartridge structure can be simplified.

A center hole is provided in the intermediate filter, and the center hole is fitted into the second outlet, so that the space formed between the outer container and the inner container is the first space for accommodating the inner container and the second space. The first space is divided into natural spaces, and the first space is filled with natural stones, while the second space is filled with natural stone balls formed into a substantially constant granular shape. The natural stone balls facilitate the mixing of the respective mineral components as the shunts flowing through the merging in the second space.

Further, since a check valve is provided at each of the second inflow port and the second outflow port, the inside of the inner container is shut off by the check valve at the time of water stop, so that the calcium main agent that easily elutes remains in the water. It is possible to supply a stable concentration of mineral water without being added to. Therefore, a long-life mineral addition cartridge can be obtained.

Since the check valve at the second outlet is one of the mortar-shaped nozzle and the natural stone ball provided at the second outlet, the natural stone ball can be used also as the valve body of the check valve. Since the balls are exchanged one after another, the calcium adhesion of the natural stone balls that are the valve bodies does not become a problem.

Since the check valve at the second inlet is an umbrella-type check valve body in which the second inlet is covered from the inner container side, it is possible to prevent the calcium main agent from leaching out from the second inlet. it can.

Since the calcium main ingredient is ionized calcium containing calcium as a main component and at least one or more kinds of mineral components of magnesium, iron, phosphorus, potassium and sodium, it has an antibacterial effect or a bactericidal effect. There is.

Further, according to the method for judging the life of the mineral addition cartridge of the present invention, the pH value of the raw water and the pH value of the mineral water are respectively detected by immersing them in pH test paper and
It is possible to make a reliable judgment by using an inexpensive pH test paper because the color of each test paper is compared and the color of the pH test paper becomes almost the same when the life of mineral addition is reached. .

Further, since the mineral addition type water purifier of the present invention is provided with the connecting portion, the mineral addition cartridge can be mounted and the mineral water having a stable concentration can be supplied.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional configuration diagram of a mineral addition cartridge according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a main part of the inner container inflow port of the embodiment when the water is stopped.

FIG. 3 is a cross-sectional view of a main part of the inner container inflow portion when water is passed in the embodiment of the present invention.

FIG. 4 is a cross-sectional view of a main part of the inner container outlet in the embodiment of the present invention when water is stopped.

FIG. 5 is a cross-sectional view of a main part when water is flowing through the inner container outlet in one embodiment of the present invention.

FIG. 6 is a schematic cross-sectional view of a mineral addition type water purifier according to another embodiment of the present invention.

FIG. 7 is a flow path configuration diagram of a mineral-added water purifier according to another embodiment of the present invention.

[Explanation of symbols]

 1 Outer Container 2 Inner Container 3 Rolled Filter 4 Natural Stone Ball 5 Umbrella Valve Disc 6 Nozzle 9 Inflow Side Filter 10 Calcium Main Agent 11 Silica Sand 12 Coral Grains 13 Intermediate Filter 14 First Outlet 18 Raw Water Supply Channel 19 Outflow Channel 20 Outflow Channel 21 three-way valve 22 quick opening / closing means 23 mineral addition cartridge 24 communication passage 25 constant flow valve 26 water purification cartridge 27 discharge passage 28 filter media 29 hollow fiber membrane

Continuation of front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display location C02F 1/68 P 530 EK 540 AD ½ / 8 GR 1/44 B 9538-4D

Claims (9)

[Claims] 1. An outer container provided with a first inlet for supplying raw water and a first outlet for discharging mineral water, and a second inlet and a second outlet housed in the outer container. An inner container provided, wherein one or a plurality of main components are loaded in the inner container, and at least a part of a space formed between the outer container and the inner container contains a mineral component. A mineral addition cartridge characterized by being loaded with various types of natural stones. 2. The first container and the second container are opposed to each other, and the outer container and the inner container are arranged so that their central axes are substantially coaxial with each other, and the first container is provided with the outer container. A winding filter is provided, and the inflowing raw water is divided into an inner circumference and an outer circumference of the inner container, is merged in front of the winding filter, is filtered by the winding filter, and is discharged from the first outlet. Claim 1 characterized by the above.
The mineral addition cartridge described. 3. An intermediate filter having an outer shape that fits into the inner wall of the outer container is provided with a center hole, and the center hole is fitted into the second outlet, and is formed between the outer container and the inner container. The formed space is divided into a first space and a second space for accommodating the inner container, the natural stone is loaded into the first space, and the second space is formed into a substantially constant granular shape. The mineral addition cartridge according to claim 1 or 2, which is loaded with natural stone balls. 4. The mineral addition cartridge according to claim 3, wherein a check valve is provided at each of the second inflow port and the second outflow port. 5. The check valve at the second outlet comprises one of a mortar-shaped nozzle provided at the second outlet and the natural stone ball. Mineral addition cartridge. 6. The mineral addition cartridge according to claim 4, wherein the check valve at the second inlet comprises an umbrella-shaped valve body that covers the second inlet from the inner container side. . 7. The main calcium component is ionized calcium containing calcium as a main component and at least one mineral component selected from the group consisting of magnesium, iron, phosphorus, potassium and sodium. Item 7. A mineral addition cartridge according to any one of items 1 to 6. 8. The pH value of raw water and the pH value of mineral water are respectively detected by immersing them in pH test paper,
A method for determining the life of a mineral addition cartridge, characterized in that the respective colors of the test papers are compared with each other, and when the pH test papers have almost the same color, the life of mineral addition life is reached. 9. A mineral-added water purifier comprising a connecting portion to which the mineral-added cartridge according to claim 1 is mounted.