Water server

Abstract

To provide a water server that can efficiently achieve sufficient water purification effects.SOLUTION: A water server comprises: a server body equipped with a nozzle for dispensing water; and a tank provided at an upper portion of the server body to supply water to the nozzle for dispensing water. The tank is formed by an upper tank and a lower tank. A ceramic filter containing ceramic is provided on the upper tank side, and a cartridge filter containing activated carbon is provided on the lower tank side. The upper tank is filled with mixed water containing a mineral concentrate solution, which is a mixture of water and mineral ions extracted from mineral ore. The mixed water filled in the upper tank is continuously filtered by the ceramic filter and the cartridge filter.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a water server that can add minerals to tap water, well water, etc. to supply delicious drinking water. [Background technology]

[0002] Generally, water servers are used by filling commercially available mineral water into bottles of around 5 to 10 liters, which are then set on top of the server body for drinking. With this type of structure, when a bottle is empty, the heavy bottle filled with mineral water must be lifted and set back into the server body, which not only requires hard work but also requires a large amount of space to store the bottles. Another problem is that the cost of purchasing mineral water rises.

[0003] For this reason, Patent Document 1, a prior application filed by the present applicant, discloses a water server in which a two-tiered tank consisting of an upper tank and a lower tank is provided on the top of the server body, and a ceramic filter made of ceramic containing activated carbon is provided on the upper tank side.

[0004] This water server produces delicious drinking water by pouring tap water into the tank, mixing it with a mineral flocculating liquid, and purifying the water with a ceramic filter containing activated carbon. This eliminates the need for bulky and heavy bottles filled with mineral water, and because it uses tap water, it can be inexpensive. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-65505 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the water server described in Patent Document 1 has a two-tiered tank structure with an upper tank and a lower tank, and a ceramic filter made of ceramic containing activated carbon is installed on the upper tank side of the tank, but there was a problem that it was not able to purify water sufficiently.

[0007] The present invention has been made in consideration of such problems, and aims to provide a water server that mineralizes tap water, etc., to make it drinkable, and that can efficiently obtain sufficient water purification effects. [Means for solving the problem]

[0008] The water server of the present invention is a water server comprising a server body with a water injection nozzle and a tank provided on the upper part of the server body to supply water to the water injection nozzle, wherein the tank is formed by an upper tank and a lower tank, a ceramic filter containing ceramic is provided on the upper tank side, and a cartridge filter containing activated carbon is provided on the lower tank side, the upper tank is filled with mixed water prepared by mixing water with a mineral flocculate liquid containing mineral ions extracted from mineral ore, and the mixed water filled in the upper tank is continuously filtered by the ceramic filter and the cartridge filter.

[0009] Another feature of the water server of the present invention is that it comprises a server body with a water injection nozzle and a tank provided on the upper part of the server body to supply water to the water injection nozzle, the tank being formed by an upper tank and a lower tank, a first filter being provided on the upper tank side and a second filter having a different function from the first filter being provided on the lower tank side, the upper tank being filled with mixed water prepared by mixing water with a mineral flocculate containing mineral ions extracted from mineral ore, and the mixed water filled in the upper tank being filtered successively by the first filter and the second filter. [Effects of the Invention]

[0010] According to the present invention, water can be mineralized simply by mixing a mineral flocculation liquid with water, and therefore, unlike the conventional cartridges or water purification layers, it is not necessary to take a long time to elute minerals into water, and tasty water can be prepared in a short time, making it convenient to use.

[0011] Furthermore, according to the present invention, by providing a ceramic filter containing ceramic on the upper tank side of a two-tiered tank consisting of an upper tank and a lower tank, and providing a cartridge filter containing activated carbon on the lower tank side of the two-tiered tank, it becomes possible to efficiently obtain sufficient water purification effects. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a front view showing a water server 1 according to an embodiment of the present invention. [Figure 2] 2 is an exploded perspective view showing parts related to the upper tank 3 of the water server 1 shown in FIG. 1. FIG. [Figure 3] 2A and 2B are detailed structural diagrams of the cartridge filter 11 shown in FIG. 1, where (a) is a side view of the cartridge filter 11, (b) is a top view of the cartridge filter 11, and (c) is a side view showing a modified example of the cartridge filter 11. [Figure 4] FIG. 2 is a side view of the ceramic filter 15 shown in FIG. [Figure 5] 2A and 2B are partial explanatory diagrams of the assembly process of the water server 1 shown in FIG. 1, where (a) is a side view of the state in which the tray 5 is placed on the server body 2, (b) is a side view of the state in which the float 7 is attached to the bottom of the water purifier 3b, (c) is a side view of the state in which the cartridge filter 11 is attached to the cartridge base 13, and (d) is a side view of the state in which the ceramic filter 15 is attached to the filtration container 3a. DETAILED DESCRIPTION OF THE INVENTION

[0013] FIG. 1 shows an overall view of a water server 1 according to one embodiment of the present invention. The water server 1 is equipped with a pitcher 4a and a mineral flocculating liquid container 4b as accessories to be described later.

[0014] As shown in Figure 1, the water server 1 supplies drinking water to users and is formed by a server body 2 and a tank 3, which consists of an upper tank 3a consisting of a filtration container and a lower tank 3b consisting of a water purifier. The server body 2 has a recessed window 2a formed in the middle of its height, and nozzles 6 and 7 for pouring water are provided within this window 2a, with nozzle 6 being for pouring cold water and nozzle 7 being for pouring hot water. An internal cold water tank for storing cooled water and an internal hot water tank for storing heated water (both not shown) are provided inside the server body 2, and nozzle 6 is connected to the internal cold water tank, and nozzle 7 is connected to the internal hot water tank. The internal cold water tank and the internal hot water tank are connected via piping (not shown) so that water is supplied from tank 3 on the top of the server body 2.

[0015] Tank 3 supplies mineralized water to server body 2 and is placed on top of server body 2. Tank 3 has a two-tiered structure consisting of upper tank 3a, which is a filtering container, and lower tank 3b, which is a water purifier.

[0016] Next, the configuration of the tank 3 will be described. FIG. 2 is an exploded perspective view showing parts related to the tank 3 at the top of the water server 1. As shown in FIG. As shown in Figure 2, a plastic tray 5 is provided on the server body 2, and the water purifier (lower tank) 3b is installed on the tray 5. In other words, the water purifier 3b is installed on the server body 2 via the tray 5. The tray 5 is made of a white plastic container. Here, as shown in Figures 1 and 5(a), when the water purifier 3b is installed on the server body 2 via the tray 5, a small gap 8 is provided between the tray 5 and the server body 2. This gap 8 makes it easy to remove dust and the like. As shown in Figure 2, a float 7 is attached to the bottom of the water purifier 3b, so that the float 7 is located below the water purifier 3b when the water purifier 3b is installed on the server body 2. The water purifier 3b is made of a transparent polygonal plastic container that allows ultraviolet light to pass through.

[0017] As shown in Figure 2, a lid 9 for the water purifier 3b is provided on top of the water purifier 3b, and a cartridge base 13 for attaching a cartridge filter 11 containing activated carbon is provided on top of the lid 9 for the water purifier 3b. The lid 9 and cartridge base 13 are made of white plastic. When the cartridge base 13 with the cartridge filter 11 attached thereto is placed on the lid 9 of the water conditioner 3b, the cartridge filter 11 is positioned at the top of the water conditioner 3b. The method of attaching cartridge filter 11 to cartridge base 13 will be described in detail in the method of assembling water server 1, which will be described later. Next, a filtering vessel (upper tank) 3a to which a ceramic filter 15 is attached is arranged to be placed on the lid 9 of the water conditioner 3b. When the filtration container 3a with the ceramic filter 15 attached thereto is placed on the lid 9 of the water conditioner 3b, the ceramic filter 15 is positioned at the bottom of the filtration container 3a. The method of attaching ceramic filter 15 to filtration vessel 3a will also be described in detail in the method of assembling water server 1, which will be described later. The filter container 3a is covered with a lid 17, which prevents dust and other particles in the air from falling into the filter container 3a. The lid 17 is also made of white plastic.

[0018] Next, the configuration of the cartridge filter 11 will be described in detail. Figure 3 is a detailed structural diagram of the cartridge filter 11, where (a) is a side view of the cartridge filter 11, (b) is a top view of the cartridge filter 11, and (c) is a side view showing a modified example of the cartridge filter 11. As shown in Figure 3(a), the cartridge filter 11 is a vertically long rectangle when viewed from the side, and has a male threaded portion 11a at its top that screws into a female threaded portion 13a (see Figure 2) provided on the inside of the cartridge base 13. The cartridge filter 11 has a filter mainly made of activated carbon, and has a function of mainly removing impurities.

[0019] In this embodiment, as shown in Fig. 3(b), the four-layer structure is composed of, in order from the outer periphery, an activated carbon layer 11b, a xerolite layer 11c, a ceramic ball layer 11d, and an Ag ion layer 11e. However, the order of the four layers 11b to 11e may be any order other than that shown in Fig. 3(b).

[0020] As shown in FIG. 3(b), an opening 11f is provided inside the four layers 11b to 11e of the four-layer structure, and when the ceramic filter 15 described later is attached during assembly, its water droplet portion 15b (described later) is inserted into the opening 11f. As a result, water from the water droplet portion 15b of the ceramic filter 15 (water filtered by the ceramic filter 15) flows into the opening 11f of the cartridge filter 11 and is continuously filtered by passing through the four layers 11b to 11e of the cartridge filter 11. In this way, the water is continuously filtered by the ceramic filter 15 and the cartridge filter 11, which have different functions, so that filtered water of higher quality can be obtained.

[0021] Furthermore, the outer periphery 11g of the cartridge filter 11 is made of a transparent plastic container, which allows ultraviolet light to pass through. This allows the activated carbon layer 11b to be directly exposed to ultraviolet light through the transparent polygonal plastic container of the water purifier 3b and the transparent plastic container on the outer periphery 11g of the cartridge filter 11, keeping the activated carbon constantly fresh and revitalized. This prevents the activated carbon from having a moldy smell or other odors. In the above embodiment, the four layers 11b to 11e are formed in order from the outer periphery, but this is not limited to this. The four layers 11b to 11e may be formed in order from the top in the vertical direction, as shown in FIG. 3(c). Furthermore, in the above embodiment, the cartridge filter 11 is formed of four layers 11b to 11e including the activated carbon layer 11b, but it may be formed of only the activated carbon layer.

[0022] The present invention is characterized in that a cartridge filter 11 made of an activated carbon layer separate from the ceramic filter 15 is provided on the lower tank 3b side. The activated carbon layer 11b of the cartridge filter 11 is exposed to direct ultraviolet light through the transparent polygonal plastic container of the water purifier 3b and the transparent plastic container on the outer periphery 11g of the cartridge filter 11, so the activated carbon is constantly revitalized and does not need to be replaced, allowing it to be used semi-permanently.

[0023] Next, the configuration of the ceramic filter 15 will be described in detail. As shown in FIG. 2, a communication passage 3a1 consisting of a small circular hole that leads to the water conditioner (lower tank) 3b is opened on the bottom surface of the filtration container (upper tank) 3a, and a ceramic filter 15 containing ceramic is attached to the communication passage 3a1, as will be described in detail later. As shown in Figure 4, ceramic filter 15 is formed by firing ceramic powder into a dome shape with a thickness of 0.5 to 2 cm, preferably about 1 cm, and its bottom surface 15a is formed with a protruding water drip portion 15b for discharging filtered water, which mainly functions as a sterilizer. Water drip portion 15b of ceramic filter 15 is provided with a female screw portion. By attaching the water dripping portion 15b of the ceramic filter 15 to the communicating passage 3a1, the water in the filtration container 3a is filtered by the ceramic filter 15 and then falls by its own weight from the communicating passage 3a1 into the opening 11f of the cartridge filter 11 in the lower tank 12.

[0024] In this case, the ceramic filter 15 is fired to have a particle size of 0.1 to 1.0 μm, preferably about 0.5 μm. By achieving this particle size, for example, 1 liter of water can be filtered in about 40 to 60 minutes. It is possible to appropriately change the particle size and filtration capacity of the ceramic filter 15. The filtration by the ceramic filter 15 removes the aggregates in the filter container 3a, and the purified water falls into the water conditioner 3b. As described above, the water is continuously filtered by the ceramic filter 15 and the cartridge filter 11, which have different functions, so that filtered water of higher quality can be obtained.

[0025] Next, a method for assembling water server 1 will be described with reference to FIG. 2 and FIGS. 5(a) to (d). First, before assembling the water server 1, pour water into the pitcher 4a provided, place the cartridge filter 11 and the ceramic filter 15 in that order into the water, and then bleed the air out of the cartridge filter 11 and the ceramic filter 15.

[0026] 2 and 5(a), a plastic tray 5 is placed on the server main body 2. Here, a circular hole 2a is provided on the top surface of the server main body 2, and a hole 5a is also formed in the tray 5 so as to fit into the circular hole 2a. Then, as shown in FIG. 5(b), a float 7 is attached to the bottom of the water conditioner (lower tank) 3b. That is, as shown in Figure 2, the nut 7b attached to the protrusion 7a on the top surface of the float 7 is removed, the protrusion 7a on the top surface of the float 7 is inserted into the small hole 3b1 provided on the bottom of the water purifier 3b, and the nut 7b is screwed onto the protrusion 7a to attach it. The water purifier 3b with the float 7 attached is placed on the tray 5 on the server body 2. At this time, the float 7 is inserted into the circular hole 2a provided on the top surface of the server body 2 (see Figure 2). Then, the lid 9 is attached to the top of the water purifier 3b. The lid 9 has a hole 9a formed therein.

[0027] Next, as shown in FIG. 5(c), the cartridge filter 11 is attached to the cartridge base 13. That is, as shown in Fig. 2, the upper part of the cartridge filter 11 is attached to the underside of a cartridge base 13 placed on the lid 9. Here, a hole 13a is formed in the cartridge base 13, and a female thread portion is provided inside the hole 13a so as to engage with a male thread portion 11a (see Fig. 3(a)) provided on the upper part of the cartridge filter 11. The upper part of the cartridge filter 11 is attached to the lower surface of the cartridge base 13 by engaging the female threaded portion of the hole 13 a of the cartridge base 13 with the male threaded portion 11 a of the upper part of the cartridge filter 11 .

[0028] The cartridge base 13 with the cartridge filter 11 attached thereto is placed on the lid 9 of the water conditioner 3b. Here, the cartridge base 13 is designed to fit together with the lid 9 of the water conditioner 3b. When the cartridge filter 11 is attached to the cartridge stand 13 and placed on the lid 9 of the water purifier 3b, the lower part of the cartridge filter 11 passes through the hole 9a in the lid 9 and enters the water purifier 3b, so that the cartridge filter 11 is positioned at the top inside the water purifier 3b. As mentioned above, the outer periphery 11g of the cartridge filter 11 is made of a transparent plastic container that allows ultraviolet light to pass through, so the activated carbon is directly exposed to ultraviolet light through the transparent polygonal plastic container of the water purifier 3b and the transparent plastic container of the outer periphery 11g of the cartridge filter 11, constantly reviving the activated carbon to a fresh state. This prevents the activated carbon from having a moldy smell or other odors.

[0029] Next, as shown in FIG. 5(d), a ceramic filter 15 is attached to the filtration vessel (upper tank) 3a, and the filtration vessel 3a with the fixed ceramic filter 15 is placed on the cartridge stand 13 above the water purifier 3b. 2, packing 15c is attached to the water dripping portion 15b of the ceramic filter 15, and the water dripping portion 15b of the ceramic filter 15 with the packing 15c attached is inserted into the communicating passage 3a1 of the filtration vessel 3a. With the water dripping portion 15b of the ceramic filter 15 with the packing 15c attached inserted into the communicating passage 3a1 of the filtration vessel 3a, a nut 15d is attached to the female thread portion of the water dripping portion 15b and tightened. That is, the lower surface of the ceramic filter 15 is fixed to the filtration vessel 3a via a packing 15c.

[0030] Here, as mentioned above, water from the water droplet portion 15b of the ceramic filter 15 (water filtered by the ceramic filter 15) flows into the opening 11f (see Figure 3(b)) of the cartridge filter 11 and is continuously filtered by the cartridge filter 11. That is, a ceramic filter 15 is provided on the filtration vessel (upper tank) 3a side of a communication passage 3a1 provided between the filtration vessel (upper tank) 3a and the water purifier (lower tank) 3b, and a cartridge filter 11 is provided on the water purifier (lower tank) 3b side of the communication passage 3a1. Therefore, the water in the filtration vessel (upper tank) 3a is continuously filtered by both the ceramic filter 15 and the cartridge filter 11. In this way, the water is continuously filtered by the ceramic filter 15 and the cartridge filter 11, which have different functions, so that filtered water of higher quality can be obtained. Finally, the lid 17 is placed on the filtration vessel 3a to complete the assembly.

[0031] Next, how to use the water server 1 described above will be described. As mentioned above, in the preliminary stage of assembling the water server 1, the cartridge filter 11 and the ceramic filter 15 are placed in the water in the attached pitcher 4a, and the air is removed from the cartridge filter 11 and the ceramic filter 15.

[0032] Once the assembly of the water server 1 described above is complete, first pour the mineral flocculation liquid (Pure Drop) from the mineral flocculation liquid container 4b into the included pitcher 4a, then add water (tap water, well water, etc.) and stir to make mineral water. Here, 5 L of mineral water is made using approximately 1 ml (1 dropper) of mineral flocculation liquid. The produced mineral water is then poured into the filtration vessel (upper tank) 3a. When the mixed water containing this mineral flocculate liquid is filled into the filter container 3a, the mineral ions contained in the mineral flocculate liquid disperse in the water within the filter container 3a, and mineralize the water by bonding to or coordinating around water molecules. Here, the mineral flocculant is an aqueous flocculant obtained by treating mineral ore mainly composed of mica with an edible acid to extract mineral ions. That is, it is a liquid containing mineral ions extracted from mineral ores, and the mineral ores used are those mainly composed of mica. Mica is a silicate mineral containing minerals such as alkali metals, alkaline earth metals, iron, and aluminum, and one or more types of mica can be selected and used, such as biotite, muscovite, phlogopite, and lepidolite. Mica is preferably used in a powdered state for the extraction of mineral ions, but it may also be in a crystalline state.

[0033] Mineral ions are extracted from mica by acid treatment of powdered or crystalline mica. Acid treatment is carried out by dissolving the mica in an edible acid such as acetic acid or citric acid. After dissolution, the solution can be concentrated to obtain a liquid mineral flocculate. This mineral flocculate contains a high concentration of the minerals contained in the mica in the form of ions. Table 1 shows the analytical results of the mineral flocculate.

[0034] As shown in the table, the mineral flocculate liquid contains not only major minerals essential to the human body, such as sodium, phosphorus, and iron, but also trace minerals such as fluorine and silicon. The mineral flocculate liquid acts to mineralize water, and for mineralization, it preferably contains at least Ca ions, K ions, Fe ions, Zn ions, Na ions, Cu ions, Mn ions, Cr ions, Al ions, Ni ions, Si ions, P ions, Ti ions, F ions, and Co ions. That is, the mineral flocculation liquid contains at least Ca ions, K ions, Fe ions, Zn ions, Na ions, Cu ions, Mn ions, Cr ions, Al ions, Ni ions, Si ions, P ions, Ti ions, F ions, and Co ions.

[0035] [Table 1]

[0036] Mineral flocculation liquid is added in small amounts to tap water, well water, etc. For example, in the case of a mineral flocculant solution with the components shown in Table 1, tap water can be mineralized by adding 1 cc to 3 to 5 liters of tap water.

[0037] In mixed water containing mineral flocculant, the mineral ions in the mineral flocculant bind to or coordinate around water molecules, surrounding them and mineralizing the water.The mineral ions bind to or coordinate around water molecules, preventing the growth of bacteria and the oxidation of water. The bonding and coordination of mineral ions also gives water a delicious, mellow taste. Furthermore, the bonding and coordination of mineral ions also deodorize and decolorize water. These actions of mineral ions mineralize water in a short time, about 5 to 30 minutes. Furthermore, mineral ions coagulate and precipitate organic matter in tap water.

[0038] When mineral water is poured into the filtration container (upper tank) 3a, the mineral water is filtered and purified by the ceramic filter 15 and cartridge filter 11 as it moves from the filtration container (upper tank) 3a to the water purifier (lower tank) 3b. Here, the aforementioned aggregated and precipitated organic matter is also filtered and removed by the ceramic filter 15 . That is, water from the water drip section 15b of the ceramic filter 15 (water filtered by the ceramic filter 15) flows into the opening 11f of the cartridge filter 11, is continuously filtered by the cartridge filter 11, and is filled into the water purifier (lower tank) 3b, and also into the internal cold water tank and internal hot water tank. Here, harmful substances such as chlorine, odor, trihalomethanes, and lead are adsorbed and removed mainly by activated carbon in the cartridge filter 11. This makes the tap water taste better, and it can be taken out from the nozzle of the server body. The ceramic filter 15 mainly functions as a sterilizer, and the cartridge filter 11 mainly functions as a remover of impurities.

[0039] In this way, the water is continuously filtered by the ceramic filter 15 and the cartridge filter 11, which have different functions, so that filtered water of higher quality can be obtained. Then, by inserting the power cord plug on the back of the water server 1 (not shown) into an outlet and turning on the power, the purified water in the internal cold water tank is cooled and the purified water in the internal hot water tank is heated. Therefore, when nozzle 6 is operated, cold water is poured, and when nozzle 7 is operated, hot water is poured.

[0040] As described above, in the water server 1 according to the embodiment of the present invention, the mineral ions contained in the mineral flocculating liquid disperse into the water in the filter container (upper tank) 3a and mineralize the water, imparting a savory flavor to the water and making it mellow. Moreover, the mineral ions prevent oxidation and inhibit bacterial growth, and further flocculate organic matter in the water, inhibiting water corrosion. In addition, a ceramic filter 15 made of fired ceramic powder is provided on the filtering container (upper tank) 3a side, and a cartridge filter 11 made mainly of activated carbon is provided on the water purifier (lower tank) 3b side, so that water purification is carried out continuously from the ceramic filter 15 to the cartridge filter 11, making it possible to efficiently obtain a sufficient water purification effect. Here, the ceramic filter 15 mainly has a function of sterilization, and the cartridge filter 11 mainly has a function of removing impurities. Therefore, the water is continuously filtered by the ceramic filter 15 and the cartridge filter 11, which have different functions, so that filtered water of higher quality can be obtained.

[0041] Furthermore, the water purifier 3b is made of a transparent polygonal plastic container, and the outer periphery 11g of the cartridge filter 11 is also made of a transparent plastic container, both of which allow ultraviolet light to pass through. This allows the activated carbon to be directly exposed to ultraviolet light through the transparent polygonal plastic container of the water purifier 3b and the transparent plastic container of the outer periphery 11g of the cartridge filter 11, constantly reviving the activated carbon to a fresh state. This prevents the activated carbon from having a moldy smell or other odors. The activated carbon in this cartridge filter 11 is exposed to direct ultraviolet light through the transparent polygonal plastic container of the water purifier 3b and the transparent plastic container of the cartridge filter 11, so that the activated carbon is constantly revitalized to a fresh state, eliminating the need to replace the cartridge filter 11 and allowing it to be used semi-permanently. Furthermore, when the water purifier 3b is installed on the server body 2 via the tray 5, a small gap 8 is provided between the tray 5 and the server body 2, which makes it easy to remove dust and the like.

[0042] Therefore, according to the present invention, water can be mineralized simply by mixing the mineral flocculation liquid with water, so there is no need to take a long time to elute minerals into water as with conventional cartridges or water purification layers, and tasty water can be produced in a short time, making it convenient to use. Furthermore, water is purified continuously through two filters with different functions, from a ceramic filter made from fired ceramic powder to a cartridge filter made mainly from activated carbon, so sufficient water purification can be achieved efficiently. In addition, because the activated carbon in the cartridge filter is exposed to direct ultraviolet light, the activated carbon is constantly revitalized and there is no need to replace the cartridge filter, allowing for semi-permanent use. This makes it easy to mineralize water and makes it easy to use in the average household. [Explanation of symbols]

[0043] 1. Water Server 2. Server itself 3 Tank 3a Filtration vessel (upper tank) 3b Water purifier (lower tank) 15 Ceramic Filter 11 Cartridge filter 13 Cartridge stand

Claims

1. A water server comprising a server body with a water injection nozzle and a tank provided on the upper part of the server body for supplying water to the water injection nozzle, wherein the tank is formed by an upper tank and a lower tank, a ceramic filter containing ceramic is provided on the upper tank side, and a cartridge filter containing activated carbon is provided on the lower tank side, the upper tank is filled with mixed water prepared by mixing water with a mineral flocculate liquid containing mineral ions extracted from mineral ore, and the mixed water filled in the upper tank is continuously filtered by the ceramic filter and the cartridge filter.

2. The water server of claim 1, wherein a connecting passage is provided between the upper tank and the lower tank, the ceramic filter is provided on the upper tank side of the connecting passage, and the cartridge filter is provided on the lower tank side of the connecting passage, and the water in the upper tank is filtered continuously by both the ceramic filter and the cartridge filter and filled into the lower tank.

3. The water server according to claim 1 or 2, wherein the lower tank is made of a transparent plastic container that transmits ultraviolet light, and the outer periphery of the cartridge filter is made of a transparent plastic container that transmits ultraviolet light, so that ultraviolet light can directly hit the activated carbon in the cartridge filter.

4. 3. The water server according to claim 2, wherein a small gap is formed between the lower tank and the server body when the lower tank is installed on the server body.

5. 2. The water server according to claim 1, wherein the mineral flocculating liquid is an aqueous flocculant obtained by extracting the mineral ions from a mineral ore mainly composed of mica through an acid treatment.

6. A water server comprising a server body with a water injection nozzle and a tank provided on the upper part of the server body for supplying water to the water injection nozzle, wherein the tank is formed by an upper tank and a lower tank, a first filter is provided on the upper tank side, and a second filter having a different function from the first filter is provided on the lower tank side, the upper tank is filled with mixed water prepared by mixing water with a mineral flocculate containing mineral ions extracted from mineral ore, and the mixed water filled in the upper tank is filtered successively by the first filter and the second filter.

7. The water server of claim 6, wherein the first filter is a ceramic filter containing ceramic and having a sterilizing function, and the second filter is a cartridge filter containing activated carbon and having a function of removing impurities.

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