JP5947436B1 - Porous body assembly and method for manufacturing the same - Google Patents

Abstract

Provided are a porous body assembly that does not contain an organic adhesive, has high bondability between a porous body and a porous body holding member, and can generate a fine bubble liquid, and a method for manufacturing the same. A front porous body 301 made of a sintered stainless steel metal, a porous body holding member 302a made of stainless steel and holding the porous body 301, and the porous body 301 are made of a porous body holding member 302a. The contact surface 306a between the porous body 301 and the porous body holding member 302a formed on a part of the surface of the porous body 301 by being held on the surface, and another part other than the above part of the surface of the porous body 301 And a porous body holding member 302a, and the contact surface 306a has a layer 305 containing nickel as a main component. [Selection] FIG.

Description

  The present invention relates to a porous body assembly for producing a fine bubble (fine bubble) liquid and a method for producing the same, and more particularly, a porous suitable for producing a fine bubble liquid containing fine bubbles having a size of 100 to 200 nm. The present invention relates to a body assembly and a method for manufacturing the same.

  Liquids (fine bubble liquids) containing fine bubbles (fine bubbles) such as hydrogen, oxygen and carbon dioxide in liquids such as water are expected to have an antioxidant effect when used for drinking. When it is used for cosmetics, a beauty effect is also expected.

  Conventionally, for example, those described in Patent Documents 1 and 2 have been proposed for the production of hydrogen water. In Patent Document 1, a gas such as hydrogen gas is supplied into water or a predetermined solution through a porous plate, whereby the gas such as hydrogen gas is dissolved in water or a predetermined solution as nanometer-order fine bubbles. Or the apparatus which makes it melt | dissolve and produces | generates nanobubble water and a foam | form is proposed. Patent Document 2 discloses that fine bubbles are dispersed in a liquid using a porous inorganic material (ceramic material, glass material or plastic material) in a pot for producing hydrogen water for beverages. ing.

JP 2014-226616 A Registered Utility Model No. 3197613

  As a method of incorporating the porous plate or the porous inorganic material described in the above-mentioned patent document (hereinafter referred to as “porous body”) into the fine bubble liquid generating apparatus, the porous body is attached to the holding member (attachment). It is thought that the method of attaching to the fine bubble liquid production | generation apparatus hold | maintains to a member) and is simple is easy. At this time, if the porous body and the holding member are not sufficiently joined, and there is a gap (crack) larger than the fine pores of the porous body between the porous body and the holding member, the gas will flow from the gap to the liquid. As a result of the outflow, the size of bubbles supplied to the liquid cannot be kept fine (on the order of micrometers and nanometers).

  As a method for joining the metal porous body and the holding member, welding, packing, caulking, and the like are generally used. However, there is a possibility that the porous body and the holding member are not sufficiently joined by these methods. In addition, when the porous body and the holding member are joined with an organic adhesive, the components of the adhesive may be harmful to the human body, so the fine bubble liquid cannot be used for drinking.

  In the above-described patent document, no consideration is given to the bonding between the porous body and the holding member.

  In view of the above circumstances, an object of the present invention is a porous body assembly that does not contain an organic adhesive, has high bondability between the porous body and the porous body holding member, and can generate a fine bubble liquid. And providing a manufacturing method thereof.

  A porous body assembly according to the present invention includes a porous body having a surface that contacts a liquid and a surface to which a gas is supplied, and the gas supplied to the surface to which the gas is supplied is converted into the liquid. A porous body assembly configured to be supplied into the liquid as fine bubbles by passing through the porous body toward a contacting surface, the porous body comprising a sintered metal of stainless steel And a porous body holding member that is made of stainless steel and holds the porous body, and the porous body is formed on a part of the surface of the porous body by being held by the porous body holding member. A contact surface between the porous body and the porous body holding member, and a groove formed between the porous body holding member and another part other than the part of the surface of the porous body. The contact surface is made of nickel. And having a layer with.

  The method for producing a porous body assembly according to the present invention includes a porous body having a surface in contact with a liquid and a surface to which a gas is supplied, and the gas supplied to the surface to which the gas is supplied. Is a method for manufacturing a porous body assembly configured to be supplied into the liquid as fine bubbles by passing through the porous body toward a surface in contact with the liquid. The porous body made of a sintered metal and a porous body holding member made of stainless steel and holding the porous body are prepared, the porous body is brought into contact with the porous body holding member, and a contact portion A brazing material containing an alloy containing nickel as a main component is disposed on the substrate and heated to join the porous body and the porous body holding member together by brazing.

  According to the present invention, a porous body assembly that does not contain an organic adhesive, has high bondability between the porous body and the porous body holding member, and can generate a fine bubble liquid, and a method for manufacturing the same. It becomes possible to provide. Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

Sectional drawing of the fine bubble hydrogenous water generator of one Example of this invention. The side view of the fine bubble hydrogenous water generator of one Example of this invention. The figure explaining the components and assembly of the fine bubble hydrogen water generator of one Example of this invention. The figure explaining the components and assembly of the fine bubble hydrogen water generator of one Example of this invention. The figure explaining the components and assembly of the fine bubble hydrogen water generator of one Example of this invention. The figure explaining the components and assembly of the fine bubble hydrogen water generator of one Example of this invention. Sectional drawing of the fine bubble generator for bathtubs of one Example of this invention. The top view of the fine bubble generator for bathtubs of one Example of this invention. The side view of the fine bubble generator for bathtubs of one Example of this invention. The figure explaining the components and assembly of the micro bubble generator for bathtubs of one Example of this invention. The figure explaining the components and assembly of the micro bubble generator for bathtubs of one Example of this invention. The figure explaining the components and assembly of the micro bubble generator for bathtubs of one Example of this invention. The top view and sectional drawing which show the 1st example of the porous body assembly which concerns on this invention. The top view and sectional drawing which show the 2nd example of the porous body assembly which concerns on this invention. The top view and sectional drawing which show the 3rd example of the porous body assembly which concerns on this invention. The figure which shows typically an example of the manufacturing flow of the porous body assembly which concerns on this invention. The cross-sectional schematic diagram explaining the outline | summary of the porous body assembly which concerns on this invention. 3 is a graph showing the measurement result of hydrogen particle size in the hydrogen water generator in Example 1. FIG. 3 is a graph showing the hydrogen concentration in the hydrogen water generator in Example 1. It is a side view which shows an example of a general brazing process. It is a side view which shows the other example of a general brazing process.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the following embodiments, and improvements and modifications can be made without departing from the scope of the invention.

[Porous body assembly and method for producing porous body assembly]
First, an outline of the porous body assembly according to the present invention will be described. FIG. 17 is a schematic cross-sectional view for explaining the outline of the porous body assembly according to the present invention. As shown in FIG. 17, the porous body 400 constituting the porous body assembly has a surface 401 that contacts the liquid 403 and a surface 402 to which a gas 404 is supplied. The gas supplied to the surface 402 to which the gas 404 is supplied passes through the micropores of the porous body 400 toward the surface 401 in contact with the liquid 403 (in the direction of the arrow in FIG. 17). It is configured to be supplied into the liquid 403 as bubbles 405. The gas 404 is accelerated when passing through the micropores of the porous body 400 and comes into contact with the liquid 403 at a high speed. As a result, cavitation occurs at the interface between the porous body 400 and the liquid 403, and fine bubbles (microbubbles, nanobubbles) 405 are generated.

  The porous body assembly according to the present invention includes the porous body described above and a porous body holding member (not shown in FIG. 17) that holds the porous body. The porous body can be attached to various members (attached members) by the porous body holding member. The member to be attached is not particularly limited, and can be selected according to the use of the fine bubble liquid (drinking, beauty / health, medical, etc.). For example, if the fine bubble liquid is drinkable, a beverage containing fine bubbles can be provided by attaching it to a liquid container containing a drinkable liquid such as water. Moreover, if the fine bubble liquid is for beauty and health use, a bath liquid containing fine bubbles can be provided by attaching it to the bathtub.

  The gas 404 is not particularly limited, and can be selected according to the use of the fine bubble liquid as in the above-described attached member. Specific examples include hydrogen, oxygen, carbon dioxide and hydrogen peroxide gas.

  Next, the detailed structure of the porous body assembly according to the present invention will be described. FIG. 13 is a top view and a sectional view showing a first example of a porous body assembly according to the present invention. As shown in FIG. 13, a porous body assembly 300 a according to the present invention includes a porous body 301 made of a sintered metal of stainless steel and a porous body holding member 302 a made of stainless steel and holding the porous body 301. Have In this example, the porous body 301 has a disk shape, and the porous body holding member 302a has a hollow disk shape. The porous body 301 and the porous body holding member are formed on a part of the outer peripheral surface of the porous body 301 by being held (fitted) inside the porous body holding member 302a (hollow portion). A contact surface with 302a is formed. In addition, a groove 303a is provided between another portion of the outer peripheral surface of the porous body 301 (portion that does not become a contact surface) and the porous body holding member 302a. In this example, the groove 303a has a quadrangular shape when the cross section of the porous body assembly 300a is viewed. The contact surface has a layer 306a containing nickel (Ni) as a main component. The layer 306a containing Ni as a main component is made of a brazing material containing an alloy containing Ni as a main component (hereinafter referred to as “Ni brazing”) for the porous body 301 and the porous body holding member 302a. It is derived from attaching. By such bonding, the porous body assembly according to the present invention realizes high bonding properties between the porous body 301 and the porous body holding member 302a without using a highly harmful organic adhesive, Generation of fine bubbles (especially 100 to 200 nm) into the inside is realized.

  In the present invention, stainless steel is used as the material of the porous body 301 and the porous body holding member 302a. As the porous body 301, in addition to the sintered metal of stainless steel, a sintered metal of copper, a sintered ceramic, or the like can also be used. However, when considering using the fine bubble liquid for drinking, a sintered metal made of stainless steel Is desirable.

  Next, a method for manufacturing a porous body assembly according to the present invention (a method for joining a porous body and a porous body holding member) will be described. FIG. 16 is a diagram schematically showing an example of the manufacturing flow of the porous body assembly according to the present invention. As shown in FIG. 16, in the method for manufacturing the porous body assembly 300 according to the present invention, a porous body 301 and a porous body holding member 302a are prepared, and the porous body 301 is held by the porous body holding member 302a. (Step (a)), the brazing material 305 is disposed (filled) in the contact portion (groove 303a) (step (b)), and the porous body 301 and the porous body holding member 302a are brazed by heating. Bonding is performed by attaching (step (c)). The step (b) of filling the brazing material and the step (c) of heating may be performed twice or more.

  Here, a general brazing method will be described. 20A and 20B are side views showing examples of general brazing. As shown in FIGS. 20A and 20B, in general brazing, a wire-like brazing material 201a is supplied to a joint portion 203 of members to be joined 202a and 202b, and the joint portion 203 is heated by a burner or the like. A member to be joined is joined, or a powdered brazing material 201b is disposed in the joining portion 203, and the member to be joined is joined by heating the member to be joined in an electric furnace or the like. However, such a method is applied to the joining of metal dense bodies, and when joining a metal dense body and a porous body as in the present invention, the porous body is porous even if this method is applied. As a result of the brazing material flowing out into the material, sufficient jointability cannot be obtained.

  On the other hand, in the present invention, the porous body 301 and the porous body holding member 302a are joined by filling the groove 303a with a brazing material more than the conventional brazing and heating. By filling a large amount of the brazing material in this manner, sufficient bondability can be obtained even if one of the members to be bonded is a porous body. Therefore, the groove 303a needs to be configured to be able to fill a large amount of brazing material. In this respect, the structure of the joined body of the present invention (the joined body of the porous body 301 and the porous body holding member 302a) is different from the conventional joined body using the brazing material.

  As shown in FIG. 16B, in order to fill the groove 303a with the brazing material 305, the layer mainly composed of Ni metal derived from the brazing material after heating constitutes the groove as well as 306a in FIG. It is also formed on the surface of the porous body holding member 302a (306b). In addition, the brazing material soaks into the micropores of the porous body 301, and although not shown, an alloy constituting a layer mainly composed of Ni metal is also included around the contact surface of the porous body 301. .

  As the brazing material, it is preferable to use a mixture (paste) in which Ni brazing powder and an organic solvent are mixed in order to fill the grooves 303a. In the present invention, Ni brazing powder is used because Ni, which is the main component of Ni brazing, is a constituent of the porous body 301 and the porous body holding member 302a (stainless steel) that are members to be joined. This is because of the high bonding property. As a result of the study by the present inventors, it has been found that Ag brazing cannot enhance the bonding properties of the porous body 301 and the porous body holding member 302a according to the present invention. In addition, although there is no limitation in particular about the filling method of a brazing material, For example, a dispenser can be used.

  The composition of the Ni brazing is not particularly limited, and for example, BNi-2 defined in JIS (Japan Industrial Standards) standard can be used. The organic solvent is not particularly limited as long as it is a binder for Ni brazing. For example, NICROBRAZ CEMENT S (Hardface Weld Company, Inc.) mainly composed of ethyl cellulose can be used.

  The amount of Ni brazing powder added is preferably 8 to 10% by mass of the brazing material (Ni brazing powder and organic solvent). The amount of brazing material necessary for joining is preferably determined by the size of the porous body 301 and the porous body holding member 302 a and the size of the micropores of the porous body 301. An example of the size of the porous body assembly having the shape shown in FIG. 13 and the amount of brazing material necessary for bonding is shown in Table 1 below.

  The amount of Ni brazing required when brazing a stainless steel disk of the same size as the porous body of Table 1 and a stainless steel hollow disk of the same size as the porous body holding member of Table 1 by the conventional method Was estimated by the present inventors to be about 1.7 g (0.2 cc).

  There are no particular limitations on the heat treatment conditions during brazing, and the heat treatment can be carried out at a temperature and atmosphere common to brazing stainless steel with Ni brazing.

  The filtration accuracy of the porous body 301 is preferably 0.1 to 120 μm, more preferably 1 to 20 μm. As such a sintered metal plate, for example, a sintered metal element having a nominal filtration accuracy of 1, 2, 5, 10, 20 μm manufactured by SMC Corporation is used. In the present specification, “filtration accuracy” means the size of the particles that the fine pores of the porous body do not pass. In order to effectively generate cavitation at the interface between the porous body 301 and the liquid, it is preferable that the gas is effectively accelerated when the gas passes through the porous body 301. For this purpose, it is better to make the thickness of the porous body 301 a certain size. According to the study by the present inventors, the thickness of the porous body 301 is preferably 5 mm or more.

  Next, another embodiment of the porous body assembly according to the present invention will be described. FIG. 14 is a top view and a cross-sectional view showing a second example of the porous body assembly according to the present invention. The groove 303b of the porous body assembly 300b shown in FIG. 14 has a triangular shape when the cross section of the porous body assembly 300b is viewed. Even if the groove has such a configuration, the same effect as in the case of FIG. 13 can be obtained.

  FIG. 15 is a top view and a sectional view showing a third example of the porous body assembly according to the present invention. When the cross section of the porous body assembly 300c shown in FIG. 15 is viewed, the porous body holding member 302c has at least two steps, and the bottom surface of the porous body 301 is held in contact with the lowermost stage. ing. By forming the porous body holding member 302c in such a shape, it is possible to prevent the porous body 301 and the porous body holding member 302c from being displaced at the time of joining, and to uniformly join the entire circumference of the porous body 301. .

[Fine bubble liquid generator]
Next, an example of a fine bubble liquid generator to which the porous body assembly according to the present invention is applied will be described. 1-6, a fine bubble hydrogen water generator is demonstrated as a fine bubble liquid generator. The fine bubble hydrogen water generator of this embodiment generates hydrogen water that can be used for drinking.

  As shown in FIG. 1, the fine bubble hydrogen water generator of the present embodiment supports a hydrogen water container 1 that contains water for drinking, a lid 2 that covers the top of the hydrogen water container 1, and a hydrogen water container 1. A base 3 constituting a sealed container to be a hydrogen gas pressurizing chamber, a detachably mounted base 3, a medicine container (medicine chamber) 4 for containing a hydrogen generating agent, and a lid attached to the medicine container 4 are pressed. And a lid cover 5 for sealing which seals the medicine container.

  As shown in FIGS. 1 and 3, the hydrogen water container 1 is attached as a basic structure to a cylindrical hydrogen water container main body 11 and below the hydrogen water container main body 11 (in this embodiment, the bottom surface). It is composed of a porous plate (sintered metal plate, porous body described above) 14. A hydrogen water container handle 12 is attached to a side surface of the hydrogen water container main body 11. The hydrogen water container body 11 is made of a transparent member such as polycarbonate resin so that the generation of hydrogen fine bubbles can be visually confirmed.

  The porous plate 14 has a function of dissolving hydrogen gas from a hydrogen gas pressurizing chamber 30 described later as fine bubbles (fine bubbles) in the water in the hydrogen water container 1. Details of the porous plate 14 will be described later. The porous plate 14 is attached to the hydrogen water container main body 11 via a porous plate (sintered metal plate) attachment portion 13, and forms a hydrogen water generation chamber (hydrogen water storage portion) 10 together with the hydrogen water container main body 11. . The porous plate mounting portion 13 is integrated with the hydrogen water container main body 11 by fitting the lower end of the hydrogen water container main body 11. In this sense, the hydrogen water container body 11 including the porous plate attachment portion 13 can be regarded. Bolt holes for attaching the porous plate 14 are formed in the porous plate attachment portion 13, and a cylindrical insertion portion 18 to be inserted into the base opening 39 of the base 3 is provided.

  The porous plate 14 is formed in a circular shape, and is fixed to a ring-shaped support for attaching a porous plate (the above-described porous body holding member) 14s to constitute a porous body assembly. The porous plate 14 is fixed to the porous plate mounting portion 13 using the fixing bolt 16 via the porous plate mounting support 14s, and the opening 13a (the porous plate mounting portion 13 on the bottom surface of the hydrogen water container 1). The hydrogen water container 1 is configured together with the hydrogen water container main body 11. The porous plate 14 is not limited to a circular shape, and may be formed in a square shape, for example. A packing 15 is mounted between the porous plate mounting support 14 s and the porous plate mounting portion 13, and the hydrogen gas pressurization chamber 30 is kept airtight except for the fine holes in the porous plate 14. Yes.

  A positioning projection 19 for positioning the hydrogen water container main body 11 in the circumferential direction is provided on the insertion portion 18. By inserting the positioning protrusion 19 into the positioning recess 38 of the base 3, the hydrogen water container main body 11 is positioned at a predetermined circumferential position with respect to the base 3. In the present embodiment, the circumferential position of the hydrogen water container main body 11 is positioned so that the water supply nozzle 17 a is positioned on the side opposite to the drug accommodating portion sealing cam handle 51.

  A water supply nozzle 17 a is attached below the hydrogen water container main body 11. Water supply from the water supply nozzle 17a is performed by opening and closing the water supply passage by the valve body 17e. The valve body 17e is attached to a valve body housing portion 17f in which a water supply channel is formed. The valve body 17e is fixed to the tip of the water supply lever 17b, and a compression spring 17d and a plug 17c having a through hole are mounted between the valve body 17e and the water supply lever 17b. On the outer periphery of the plug 17c, a male screw that is screwed with a female screw formed on the inner periphery of the valve body housing portion 17f is formed. By attaching the plug 17c to the valve body housing portion 17f, the valve body 17e is constantly pressed in the direction of the hydrogen water container main body 11 via the compression spring 17d, and the water supply path formed in the valve body housing portion 17f is closed. It is supposed to be. By pulling the water supply lever 17b in the direction opposite to the hydrogen water container main body 11 side, the valve body 17e fixed to the tip of the water supply lever 17b moves against the force of the compression spring to open the water supply path, Hydrogen water in the hydrogen water container main body 11 is supplied from the water supply nozzle 17a (water supply nozzle system by operating the water supply lever). In this embodiment, in addition to the water supply from the water supply nozzle 17a, the hydrogen water container main body 11 is lifted from the base 13 by the hydrogen water container handle 12, and the hydrogen water container main body 11 is tilted, thereby It is also possible to supply hydrogen water from a spout formed at the upper end (a mug system using a handle for a hydrogen water container).

  The lid 2 includes a lid main body 22, a lid handle 21 provided on the upper surface of the lid main body 22, and a tubular insertion portion 24 provided on the lower surface of the lid main body 22 via a plurality of spacers 23. Yes. The insertion portion 24 of the lid 2 is configured to be slid and inserted into the upper end side of the hydrogen water container main body 11. The spacer 23 prevents the lid main body 22 from coming into close contact with the upper end of the hydrogen water container main body 11 so that the hydrogen gas released from the hydrogen water in the hydrogen water container 1 can be released to the outside. Although details will be described later, the fine bubble hydrogen water generator of the present embodiment uses the porous plate 14 to make hydrogen gas into fine bubbles (micro bubbles or nano bubbles) and dissolve them in water. That is, the fine bubble hydrogen water generator of this embodiment is a normal pressure type hydrogen water generator that does not require the hydrogen water container 1 to be sealed.

  As shown in FIGS. 1 and 4, the base 3 constituting the hermetic container constituting the hydrogen gas pressurizing chamber 30 has a base opening into which the insertion portion 18 of the porous plate attachment portion 13 (hydrogen water container 1) is inserted. A base body 31 having a sealing member 39, a sealing lid mounting part 36 to which the sealing lid mounting tool 5 is mounted, a drug container mounting part 37 to which the drug container 4 is mounted, and a hydrogen gas flow path component. 35. A ring groove 33g in which the O-ring 33 is mounted is formed in the base opening 39. Further, as described above, the positioning concave portion 38 into which the positioning projection 19 is inserted is formed on the inner peripheral upper portion of the base body 31.

  The sealing lid mounting part 36 and the medicine container mounting part 37 are provided below the position of the ring groove 33 g and are provided so as to protrude inside the base body 31. An opening 36 a is formed in the sealing lid mounting part 36 so that the cam part 54 of the sealing lid mounting part 5 can protrude toward the medicine container mounting part 37. The sealing lid mounting part 36 does not communicate with the hydrogen gas pressurizing chamber 30.

  The medicine container mounting part 37 is located between the sealing lid mounting part 36 and the hydrogen gas flow path constituting part 35. In this embodiment, the sealing lid mounting part 36 and the hydrogen gas flow path structure are provided. Part of the members constituting the portion 35 (the bottom surface of the sealing lid mounting part 36 and the top surface of the hydrogen gas flow path constituting part 35) also constitutes the top and bottom surfaces of the medicine container attaching part 37. The medicine container mounting part 37 does not communicate with the hydrogen gas pressure chamber 30.

  Hydrogen gas passages 35a, 35b, and 35c are formed in the hydrogen gas passage constituting member 35. In the present embodiment, the hydrogen gas flow path 35c is between the recess formed on the upper surface of the hydrogen gas flow path constituting member 35 and the bottom surface of a drug container box (medicinal chamber box) 41 of the drug container 4 described later. And communicates with the hydrogen gas introduction hole 46 of the medicine container 4. The hydrogen gas flow paths 35 a, 35 b, and 35 c communicate the hydrogen gas generation chamber 40 and the hydrogen gas pressurization chamber 30 of the medicine container 4 in an airtight manner, and the hydrogen gas generated in the hydrogen gas generation chamber 40 is transferred to the hydrogen gas pressurization chamber 30. To introduce.

  In the present embodiment, since the hydrogen water container 1 and the base 3 are configured to be separable, in order to ensure the airtightness of the hydrogen gas pressurizing chamber 30 other than the fine holes in the porous plate 14, the porous plate An O-ring 33 is installed between the insertion portion 18 of the attachment portion 13 (hydrogen water container 1) and the base opening 39 of the base body 31 (base 3). In this embodiment, a double O-ring seal structure is used to ensure airtightness. The hydrogen gas pressurizing chamber 30 is basically composed of a base body 31 and a porous plate 14, and an O-ring 33 is used to prevent hydrogen gas from leaking from locations other than the fine holes of the porous plate 14. And packing 15 are used.

  In the present embodiment, the drug container 4 is provided separately from the hydrogen gas pressure chamber 30, but the drug container 4 may be provided in the hydrogen gas pressure chamber 30. However, as will be described in detail later, the handleability of the hydrogen generating agent is improved by detachably attaching the drug container 4 to the base body 31.

  As shown in FIGS. 1 and 5, the drug container (medicine chamber) 4 slidably and detachably mounted on the drug container mounting unit 37 of the base 3 constitutes a hydrogen gas generation chamber 40 as a basic configuration. Drug container box (medical chamber box) 41, drug container lid (medical chamber box cover) 42, and drug container used when the drug container box 41 is taken in and out of the drug container mounting part 37 of the base 3. A part handle 43 is provided.

  A hydrogen gas introduction hole 46 for allowing the hydrogen gas generation chamber 40 and the hydrogen gas flow path 35 c to communicate with each other is formed in the side wall portion of the medicine container box 41. The hydrogen gas introduction hole 46 extends obliquely downward from the hydrogen gas generation chamber 40 on the upper side of the medicine container box 41 and is formed so as not to penetrate the side wall of the medicine container box 41. And a hydrogen gas introduction hole 46b extending downward from the hydrogen gas introduction hole 46a and formed so as to penetrate the bottom surface of the medicine container box 41. A medicine (hydrogen generating agent) 44 is accommodated in the hydrogen gas generation chamber 40 of the medicine container box 41.

  In order to keep the hydrogen gas generation chamber 40 airtight, an O-ring 45 is mounted between the medicine container box 41 and the medicine container lid 42. The O-ring 45 is attached to a ring groove 45g formed on the upper end surface of the medicine container box 41. In addition, since the medicine container 4 is configured to be removable from the base 3, the hydrogen gas generation chamber 40 on the medicine container 4 side and the hydrogen gas pressurization chamber 30 on the base 3 side are communicated in an airtight manner. An O-ring 45 is also mounted between the hydrogen gas flow path constituting member 35 constituting the hydrogen gas flow path 35c and the medicine container box 41. The O-ring 45 is provided so as to be located outside the intersection of the hydrogen gas passage 35c and the hydrogen gas introduction passage 46, and ensures the airtightness of the hydrogen gas passage 35c. The medicine container lid 42 is pressed against the medicine container box 41 side by a sealing lid fitting 5 described later. As a result, a pressing force is applied to the upper and lower O-rings 45 so that the sealing function works. The hydrogen gas introduction hole 46 can be provided at a location other than the side wall by devising the position of the O-ring 45, but it is desirable to provide the hydrogen gas introduction hole 46 at the side wall portion in consideration of the convenience of handling.

  As shown in FIGS. 1 and 6, the sealing lid fitting 5 having a function of pressing the drug container lid 42 against the drug container box 41 side to make the hydrogen gas generation chamber 40 a sealed space is a sealing cam. The handle 51, the sealing cam 52, and the cam handle fixing bolt 53 for fixing the sealing cam handle 51 and the sealing cam 52 are included. The cam handle fixing bolt 53 is screwed into a bolt hole formed in the sealing cam 52 via a washer 55. A cam portion 54 is formed in the sealing cam 52, and the cam portion 54 rotates the sealing cam handle 51 to rotate the sealing cam attachment 51 through the opening 36 a of the sealing lid mounting portion 36. It protrudes to the side and presses the lid 42 for the medicine container. The state (the handle longitudinal direction) of the sealing cam handle 51 shown by the solid line in FIG. 2 shows a state in which the cam portion 54 presses the medicine accommodating portion lid 42 to fix the medicine accommodating portion, and is shown by a two-dot chain line. The state of the sealing cam handle 51 indicated by (in the lateral direction of the handle) indicates a state in which the fixing is released. After releasing the fixation, the medicine container 4 can be easily detached from the base 3 by holding the medicine container handle 43 and pulling it to the front side. Conversely, after the medicine 44 is contained in the medicine container 4 and a predetermined amount of water is added, the medicine container 4 covered with the medicine container lid 42 is pushed into the medicine container mounting part 37 of the base 3. The medicine container box 41 can be sealed with the medicine container lid 42, that is, the hydrogen gas generation chamber 40 can be sealed with a simple operation of rotating the sealing cam handle 51 by 90 degrees. The lid cover 5 for sealing is not limited to the cam handle type as in the present embodiment, but may be another configuration such as a clamp type. However, considering the simplicity of operation, the cam handle type is preferable. is there.

  Next, the principle of generating fine hydrogen bubbles in water in this embodiment will be described.

  (1) A drug (hydrogen generating agent) 44 is placed in a drug container box (medicinal box) 41 of the drug container 4, and a predetermined amount of reaction water is introduced. And as above-mentioned, the chemical | medical agent storage part 4 is mounted | worn with the chemical | medical agent storage part mounting | wearing part 37 of the base 3, and is fixed with the lid | cover attachment tool 5 for sealing.

  The hydrogen generating agent 44 is a chemical that reacts with water to generate hydrogen gas. For example, a fine powdery mixture of calcium oxide and aluminum is used. Calcium oxide reacts with reaction water, changes to calcium hydroxide and generates heat, and fine powdery aluminum reacts with reaction water to generate hydrogen.

  (2) The hydrogen gas generated in the hydrogen gas generation chamber 40 is guided to the hydrogen gas introduction hole 46a in the upper part of the medicine container box (medical chamber box) 41, and then moved downward through the hydrogen gas introduction hole 46b. Further, the hydrogen gas is introduced into the hydrogen pressure chamber 30 through the hydrogen gas flow paths 35c, 35b, and 35a. As a result, hydrogen gas accumulates in the hydrogen gas pressure chamber 30.

  (3) As the reaction of the hydrogen generating agent in the medicine container box 41 proceeds, the pressure in the hydrogen gas pressure chamber 30 increases.

  (4) When the pressure in the hydrogen gas pressurizing chamber 30 becomes higher than the water head pressure due to the water in the hydrogen water container 1, the hydrogen gas is narrowed in the porous plate (sintered metal plate) 14 (fine holes). Then, hydrogen gas in the hydrogen water container 1 is released. As a result, fine bubbles of hydrogen gas are generated in the water.

  (5) The hydrogen gas is accelerated when passing through a narrow path (fine hole) in the porous plate (sintered metal plate) 14 and comes into contact with the water in the hydrogen water container 1 at a high speed. As a result, cavitation occurs at the interface between the porous plate (sintered metal plate) 14 and the water in the hydrogen water container 1, and microbubbles and nanobubbles are generated.

  When the hydrogen microbubbles rise in the water, the hydrogen dissolves into the water from the gas-liquid contact surface and becomes dissolved hydrogen in the water, increasing the amount of dissolved hydrogen in the water.

Hydrogen nanobubbles float in water and have the effect of further increasing the amount of dissolved hydrogen in water.
In order to effectively generate fine hydrogen bubbles in water, the porous plate (sintered metal plate) 14 and the hydrogen gas pressure chamber 30 play important roles.

  By using the sintered metal plate 14 configured as described above, the water head pressure of the water in the hydrogen water container 1 can be held by the sintered metal plate 14, and hydrogen gas is introduced into the hydrogen gas pressurizing chamber 30. Even before this, water in the hydrogen water container 1 can be prevented from dripping into the hydrogen gas pressure chamber 30 through the fine holes of the sintered metal plate 14.

  Further, the hydrogen concentration of the hydrogen water in the hydrogen water container can be easily increased by increasing the opening area of the opening 13a. That is, the large opening area means that the number of hydrogen gas supply holes constituted by the fine holes in the porous plate 14 is increased, and the hydrogen concentration of the hydrogen water increases as the opening area of the opening 13a increases. Is increased.

  In addition, in supplying hydrogen gas from the hydrogen gas pressurizing chamber 30 to the hydrogen water container 1 through the porous plate 14, the connection between the porous plate 14 and the support 14s for attaching the porous plate is important. Even if the airtightness is improved by the packing 15 or the O-ring 33, if the connection between the porous plate 14 and the support 14s for attaching the porous plate is insufficient, hydrogen gas is generated through the insufficient connection. It is discharged from the hydrogen gas pressure chamber 30 into the water in the hydrogen water container main body 1. Hydrogen that has passed through such a poorly connected portion has a bubble diameter as large as mm, and the effect of making fine bubbles by cavitation cannot be expected. In addition, since the flow of hydrogen gas concentrates at a location where the connection is insufficient, the amount of hydrogen gas passing through the porous plate 14 decreases, and it becomes difficult to effectively generate fine hydrogen bubbles in water. .

  On the other hand, it is desirable to use a stainless sintered metal plate as the porous plate 14, but when the stainless sintered metal plate 14 and the porous plate mounting support 14s (made of stainless steel) are joined by welding, the sintered plate is sintered. There is concern about the occurrence of cracks in the metal plate, and when using hydrogen water as a reference, it must also be avoided to connect using an adhesive.

  Therefore, as described above, in the present invention, the sintered metal plate 14 made of stainless steel and the porous plate mounting support 14s (made of stainless steel) are connected by Ni brazing. Here, in the case where the porous plate mounting support 14s has the shape shown in FIG. 14 (the cross section of the groove is triangular), Ni brazing penetrates into the sintered metal plate 14 when nickel brazing is performed once, There is also a concern that sufficient Ni brazing is not supplied between the sintered metal plate 14 and the porous plate mounting support 14s, and the connection is not sufficiently performed. Therefore, Ni brazing is performed twice so that the sintered metal plate 14 and the porous plate mounting support 14s can be connected without generating a gap. According to this method, the sintered metal plate is not cracked, and there is no problem in the generation of hydrogen water for drinking.

  In the present embodiment, the hydrogen generating agent in the medicine container box 41 reacts with the reaction water to generate hydrogen, but the reaction does not always continue stably. For this reason, by increasing the volume of the hydrogen gas pressurizing chamber 30 and storing a sufficient amount of hydrogen gas, hydrogen is stabilized from the hydrogen gas pressurizing chamber 30 to the hydrogen water container 1 through the porous plate 14. And hydrogen can be stably microbubbled. The volume of the hydrogen gas pressurization chamber 30 is formed to be at least larger than the volume in the hydrogen gas generation chamber 40.

  According to the above-described embodiment, it is possible to generate hydrogen water containing hydrogen gas without using a check valve and without using a hydrogen gas cylinder. In addition, no power source is required to generate hydrogen water, and the handling is excellent.

In the present embodiment, the hydrogen gas boosting chamber 30 and the hydrogen gas generating chamber 40 are configured separately and communicated with each other through the hydrogen gas flow path. Therefore, even if water enters the hydrogen gas boosting chamber 30, The hydrogen generating agent in the gas generating chamber 40 is not inadvertently poured with water. Further, the water that has reacted with the hydrogen gas generating agent is not introduced into the hydrogen water container accompanying the hydrogen gas.

  In this embodiment, the medicine container box 41 that forms the hydrogen gas generation chamber 40 is formed separately from the base 3 that forms the hydrogen gas pressurization chamber 30, and the medicine container mounting portion formed on the base 3. 37, the hydrogen generating agent 44 can be easily installed in the medicine container 4.

  Further, the hydrogen gas generation chamber 40 includes a medicine container box 41 and a medicine container lid 42 covering the medicine container part 41, and is attached to and detached from the medicine container mounting part 37 formed on the base 3, thereby accommodating the medicine. Since the part box 41 is sealed by the medicine container lid 42, that is, the hydrogen gas generation chamber 40 is sealed, it is very easy to install the hydrogen generating agent 44 in the medicine container 4.

  In the present embodiment, the fixing and releasing of the medicine container mounting portion 37 of the medicine container 4 is a cam system, and the fixing and releasing operation can be easily performed by the rotation of the cam handle 51 for sealing the medicine container. It has become.

  Further, according to the present embodiment, the hydrogen gas generation chamber 40 and the hydrogen gas pressurization chamber 30 are kept airtight and shut off from the outside air, so there is no problem even if the hydrogen gas concentration is high. The concentration can be kept above 75%. Thereby, hydrogen gas can be effectively produced into hydrogen water in the hydrogen water container 1 to produce fine bubbles of hydrogen gas.

  Moreover, according to this embodiment, it is a normal pressure type hydrogen water generator, and the hydrogen concentration in the air discharged from the hydrogen water container 1 can be kept at 4% or less by taking a large opening area in the lid 2. , Can help improve safety.

  In addition, although the above-mentioned Example demonstrated the case where the fine bubble (fine bubble) of hydrogen was contained in water, when making the drinking liquid, such as juice and tea other than water, contain the hydrogen fine bubble. Can be applied. In this case, since fine bubbles are generated using the porous plate, there are no check valves or a member that is difficult to clean, such as a flow path connected to the check valve, and cleaning after use of the hydrogen solution generator is easy.

  In the above-described embodiment, an agent that reacts with water to generate hydrogen gas (for example, a mixture of finely powdered calcium oxide and aluminum) is used to generate hydrogen. It is also possible to use it.

  Next, the example of the microbubble generator for bathtubs is demonstrated as a fine bubble liquid production | generation apparatus to which the porous body assembly which concerns on this invention is applied using FIGS.

  The bathtub-use fine bubble generator of this embodiment generates hydrogen water by generating fine hydrogen bubbles in hot water in the bathtub. The basic bubble bubble generator of the present embodiment is the same in principle as the fine bubble hydrogen water generator described above. Therefore, the description about the same part as the above-mentioned embodiment is omitted, and a description will be made mainly on the different part.

  Unlike the fine bubble hydrogen water generator described above, the fine bubble generator for bathtubs of this example does not include a hydrogen water container. The microbubble generator for bathtubs is immersed in the bathtub, and the bathtub itself can be regarded as corresponding to the hydrogen water container. Moreover, based on the fact that the hydrogen water container is not provided, the porous plate mounting portion is configured as a fine bubble generator lid. In addition, the configuration of the hydrogen gas introduction hole that connects the hydrogen gas pressurization chamber and the hydrogen gas generation chamber, the fixing structure of the microbubble generator base and the microbubble generator lid, the O-ring used to form the sealing structure, The arrangement structure of the packing is different from the above-described embodiment. Hereinafter, the fine bubble generator for bathtubs according to the present embodiment will be described in detail with reference to the drawings.

  As shown in FIGS. 7 and 10, in the microbubble generator for bathtubs of this embodiment, a microbubble generator lid 63 is attached to the base 71 for microbubble generator. The microbubble generator lid 63 has a porous plate (sintered metal plate, porous body described above) 64 so as to close the opening 63a, and a porous plate mounting support (porous body holding member described above) 64s. Are fixed by a plurality of fixing bolts 66. As shown in FIG. 8, the plurality of fixing bolts 66 are screwed into a plurality of fixing bolt mounting screw holes 66 a formed in the microbubble generator lid 63. A packing 65 is provided between the fine bubble generator lid 63 and the porous plate mounting support 64s so as to keep the hydrogen gas pressure chamber 70 airtight.

  Unlike the fine bubble hydrogen water generator described above, the fine bubble generator base 71 and the fine bubble generator lid 63 have a fixed structure. In this embodiment, the fine bubble generator base and the fine bubble generator lid 63 The fastening part 69 is fixed. The fastening portion 69 includes a microbubble generator lid mounting male screw 69m formed on the microbubble generator lid 63 and a microbubble generator lid mounting female screw 69f formed on the microbubble generator base 71. A plurality of fine bubble generator lid rotating jig insertion holes 68 are formed in the fine bubble generator lid 63. The fine bubble generator lid 63 is rotated and fastened to the fine bubble generator base 71 by mounting and operating a rotation jig (not shown) in the fine bubble generator lid rotation jig insertion hole 68. After the fastening, the rotating jig is removed. After the fastening, if necessary, a rod-shaped member is embedded in the fine bubble generator lid rotating jig insertion hole 68 so as not to be uneven. Further, since the fine bubble generator base 71 and the fine bubble generator lid 63 have a fixed structure, unlike the above-described double O-ring of the fine bubble hydrogen water generator, the fine bubble generator base 71 and the fine bubble generator. A packing 73 is provided between the lid 63 and the hydrogen gas pressurizing chamber 70 so as to be kept airtight.

  The microbubble generator base 71 is formed with a sealing lid mounting part 76, a medicine container mounting part 77, and a hydrogen gas introduction pipe through-hole 78. Unlike the above-described fine bubble hydrogen water generator, the hydrogen gas introduction pipe through hole 78 is provided so as to be located at the back of the sealing lid mounting part 76.

  As shown in FIGS. 7, 9 and 11, the medicine container mounting portion 77 of the fine bubble generator base 71 includes a medicine container box 81 and a medicine container box lid. ) 82 is slidably and detachably mounted. A packing 86 is provided between the medicine container box 81 and the medicine container lid 82 so that the hydrogen gas generation chamber 80 is kept airtight when attached to the medicine container mounting part 77. A medicine container handle 83 is attached to the medicine container box 81, and a hydrogen gas introduction pipe 87 is attached as a hydrogen gas introduction hole that connects the hydrogen gas pressure chamber 70 and the hydrogen gas generation chamber 80. Yes. The hydrogen gas introduction pipe 87 is fixed by welding or the like so that a gap is not formed between the hydrogen gas introduction pipe 87 and the medicine container box 81, and the hydrogen gas generation chamber 80 is kept airtight. When the medicine container box 81 is attached to the medicine container mounting part 77, the hydrogen gas introduction pipe 87 is inserted into the hydrogen gas introduction pipe through-hole 78 of the fine bubble generator base 71. In order to keep the hydrogen gas pressure chamber 70 hermetically sealed, an O-ring 85 (double O-ring) is provided between the hydrogen gas introduction pipe 87 and the hydrogen gas introduction pipe through hole 78. A medicine (hydrogen generating agent) 84 is accommodated in the medicine accommodating portion box 81.

  As shown in FIGS. 7, 9, and 12, the sealing lid mounting portion 76 of the microbubble generator base 71 includes a medicine container sealing cam handle 91 and a medicine container sealing cam 92. A sealing lid fitting is attached. The medicine container sealing cam 92 has a cam portion 94, and the medicine container sealing cam handle 91 is fixed to the medicine container sealing cam 92 via a washer 95 by a cam handle fixing bolt 93.

  The principle for generating hydrogen fine bubbles in the water in the fine bubble generator for bathtubs of the present embodiment configured as described above is basically the same as that of the above-described fine bubble hydrogen water generator. In the fine bubble hydrogen water generator described above, the hydrogen gas is a porous plate (sintered metal plate) when the pressure in the hydrogen gas pressurizing chamber 30 becomes higher than the water head pressure due to the water in the hydrogen water container 1. Hydrogen gas is released into the hydrogen water container 1 through a narrow path (fine hole) 14, whereby fine bubbles of hydrogen gas are generated in the water. In this embodiment, the microbubble generator for bathtubs is immersed in the water (hot water) in the bathtub, and the water head of the bathtub water based on the position of the microbubble generator for bathtubs in the depth direction in the bathtub When the pressure in the hydrogen gas pressurizing chamber 70 becomes higher than the pressure, hydrogen gas passes through the narrow path of the porous plate (sintered metal plate) 64 and is generated as fine bubbles in the water in the bathtub. Moreover, in the microbubble generator for bathtubs of this embodiment, even if it receives the head pressure of the water in the bathtub under a predetermined depth (under a standard water level) when installed in the bathtub. Similarly to the fine bubble hydrogen water generator, water in the bathtub is prevented from dripping into the hydrogen gas pressure chamber.

  Also in the present embodiment, the same operational effects as the above-described fine bubble hydrogen water generator can be basically obtained. In the present embodiment, the concentration of hydrogen in the air released from the bathtub hot water surface has a large discharge area, so that the concentration of hydrogen in the air can be kept at 4% or less, which can contribute to an improvement in safety.

  Below, the hydrogen concentration in the hydrogen water obtained by the fine bubble hydrogen water generator mentioned above and the particle size distribution of nanobubbles are demonstrated. The fine bubble hydrogen water generator has the structure shown in FIGS. 1 to 6, and the porous body having the structure shown in Table 1 as the porous body assembly (the porous plate 14 and the support 14s for attaching the porous plate). And the porous body holding member was used.

  FIG. 18 shows the particle size distribution of hydrogen nanobubbles in hydrogen water obtained with the fine bubble hydrogen water generator of this example. The average value measured 20 times using a nanoparticle analyzer (trade name: NanoSight (Nanosite)) manufactured by Nanosite, UK is graphed. As shown in FIG. 18, the top peak particle size of the nanobubbles was 142 nm, and the total number of nanobubbles present in the bubble diameter range of about 40 to 500 nm was about 25 million / ml. Thus, according to the fine bubble hydrogen water generator of a present Example, many hydrogen nanobubbles were formed in water.

FIG. 19 shows the change over time in the hydrogen concentration of hydrogen water obtained with the fine bubble hydrogen water generator of this example. It was measured using a Unisense Co. microsensor mono meter (MONOMETER H ₂ sensor). After the completion of hydrogen gas generation (after 10 minutes from the start of the reaction), hydrogen water was collected from the hydrogen water container body, and the change in hydrogen concentration for 60 minutes was measured. As shown in FIG. 19, the hydrogen concentration immediately after the start of the measurement was 3.02 ppm, and the hydrogen concentration decreased with the passage of time, but the high concentration was maintained at 1.5 ppm or more even after one hour.

  As described above, the porous body assembly according to the present invention has high bondability between the porous body and the porous body holding member, and no gap is generated between them, so that nanobubbles can be generated uniformly and in large quantities. It was confirmed. Furthermore, it was confirmed that the dissolved hydrogen concentration was as high as 1.5 ppm or higher even after 1 hour had passed since the nanobubbles were generated.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Moreover, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

  For example, when aluminum vaporized from the hydrogen gas generation chamber is released to the hydrogen gas pressure chamber, although the possibility is small, the filter is connected to the hydrogen gas flow path so that the vaporized aluminum does not adhere to the porous plate (sintered metal plate). You may make it provide in (the exit part of a hydrogen gas introduction pipe). Further, the present invention does not exclude that the sintered metal plate has a double structure. For example, it is also within the scope of the present invention to dispose a stainless steel sintered metal plate on the side in contact with the liquid and a stainless steel or copper alloy sintered metal plate on the hydrogen gas generation chamber side.

  DESCRIPTION OF SYMBOLS 1 ... Hydrogen water container, 2 ... Cover, 3 ... Base, 4 ... Chemical | medical agent storage part (chemical | medical chamber), 5 ... Sealing lid attachment tool, 10 ... Hydrogen water production | generation room (hydrogen water storage part), 11 ... Hydrogen water container Main body, 12 ... handle for hydrogen water container, 13 ... porous plate (sintered metal plate) mounting portion, 13a ... opening, 14, 301, 400 ... porous body, (porous plate, sintered metal plate), 14s, 302a, 302b, 302c ... porous body holding member (porous plate mounting support, frame), 15 ... packing, 16 ... fixing bolt, 17a ... water supply nozzle, 17b ... water supply lever, 17c ... plug, 17d ... compression Spring, 17e ... Valve body, 17f ... Valve body housing part, 18 ... Insertion part, 19 ... Positioning projection, 21 ... Lid handle, 22 ... Lid body, 23 ... Spacer, 24 ... Insertion part, 30 ... Hydrogen gas pressure increase Chamber 31 ... Base body 33 ... O-ring 35 ... Water Gas flow path component, 35a, 35b, 35c ... Hydrogen gas flow path, 36 ... Sealing lid mounting part, 37 ... Drug container mounting part, 38 ... Positioning recess, 39 ... Base opening, 40 ... Hydrogen Gas generating chamber, 41... Medicine container box (medical chamber box), 42. Medicine container lid (medicinal box cover), 43 drug container handle, 44. Medicine (hydrogen generating agent), 45. O-ring, 46 ... hydrogen gas introduction hole, 51 ... cam handle for sealing the medicine container, 52 ... cam for sealing the medicine container, 53 ... cam handle fixing bolt, 54 ... cam part, 55 ... washer, 63 ... microbubble generation Container lid, 63a ... opening, 64 ... porous plate (sintered metal plate), 64s ... porous plate mounting support, 65 ... packing, 66 ... fixing bolt, 66a ... fixing bolt mounting screw hole, 68 ... fine Bubble generator lid rotation jig insertion hole, 69 ... fine gas Fastening portion of generator base and fine bubble generator lid, 69m ... male screw for attaching fine bubble generator lid, 69f ... female screw for attaching fine bubble generator lid, 70 ... hydrogen gas pressurizing chamber, 71 ... base for fine bubble generator, 73 ... packing, 76 ... lid mounting part for sealing, 77 ... drug storage part mounting part, 78 ... hydrogen gas introduction pipe through-hole, 80 ... hydrogen gas generation chamber, 81 ... drug storage box (medical chamber box) , 82 ... medicine container lid (chamber box lid), 83 ... medicine container handle, 84 ... medicine (hydrogen generating agent), 85 ... O-ring, 86 ... packing, 87 ... hydrogen gas introduction pipe, 91 ... Cam handle for sealing medicine container, 92 ... Cam for sealing medicine container, 93 ... Cam handle fixing bolt, 94 ... Cam part, 95 ... Washer, 300, 300a, 300c ... Porous body assembly, 303a, 303b, 303c ... Groove, 30 6a: a layer mainly composed of Ni formed on the contact surface, 305 ... a brazing material, 306b ... a layer mainly composed of Ni formed on the surface of the porous body holding member other than the contact surface, 401 ... porous A surface of the body 400 that contacts the liquid, 402... A surface to which the gas of the porous body 400 is supplied, 403... Liquid, 404.

Claims (12)

A porous body having a surface in contact with a liquid and a surface to which a gas is supplied, wherein the gas supplied to the surface to which the gas is supplied moves toward the surface in contact with the liquid; A porous body assembly configured to be supplied into the liquid as fine bubbles by passing through
The porous body made of a sintered metal of stainless steel;
A porous body holding member made of stainless steel and holding the porous body,
A contact surface between the porous body and the porous body holding member formed on a part of the surface of the porous body by holding the porous body on the porous body holding member;
A groove formed between another part other than the part of the surface of the porous body and the porous body holding member,
The porous body assembly, wherein the contact surface has a layer mainly composed of nickel.   2. The porous body assembly according to claim 1, wherein a constituent component of the layer mainly composed of nickel is included around the contact surface of the porous body.   The porous body assembly according to claim 1, wherein the layer mainly composed of nickel is formed on a surface of the porous body holding member constituting the groove.   The porous body assembly according to any one of claims 1 to 3, wherein the groove has a quadrangular shape when a cross section of the porous body assembly is viewed.   The porous body assembly according to any one of claims 1 to 3, wherein the groove has a triangular shape when a cross section of the porous body assembly is viewed.   When the cross-section of the porous body assembly is viewed, the porous body holding member has at least two steps, and the bottom surface of the porous body is held in contact with the lowermost stage. The porous body assembly according to any one of claims 1 to 3.   The porous body has a disk shape, the porous body holding member has a hollow disk shape, and the inner diameter of the porous body holding member is larger than the outer diameter of the porous body. By fitting the porous body in the hollow portion, a part of the outer peripheral surface of the porous body and a part of the inner peripheral surface of the porous body holding member constitute the contact surface, and the outer peripheral surface of the porous body The porous body assembly according to any one of claims 1 to 6, wherein the groove is provided between another part other than the part of the porous body holding member and the porous body holding member.   The porous body assembly according to any one of claims 1 to 7, wherein a filtration accuracy of the porous body is 0.1 to 120 µm.   The porous body assembly according to any one of claims 1 to 8, wherein the gas is hydrogen, oxygen, carbon dioxide, or hydrogen peroxide gas.   The porous body assembly according to any one of claims 1 to 9, wherein an average particle diameter of the fine bubbles is 100 to 200 nm. A porous body having a surface in contact with a liquid and a surface to which a gas is supplied, wherein the gas supplied to the surface to which the gas is supplied moves toward the surface in contact with the liquid; A porous body assembly configured to be supplied into the liquid as fine bubbles by passing through
Preparing the porous body made of a sintered metal of stainless steel, and a porous body holding member made of stainless steel and holding the porous body,
The porous body has a disk shape, the porous body holding member has a hollow disk shape, and the inner diameter of the porous body holding member is larger than the outer diameter of the porous body. by fitting the porous body in the hollow portion constitutes a contact surface with a portion of the inner peripheral surface of the porous body holding member with a portion of the outer peripheral surface of the porous body, the outer peripheral surface of the porous body A groove is formed between another part other than the part of the porous body holding member and the porous body holding member, and the groove is filled with a brazing material containing an alloy containing nickel as a main component and heated to form the porous body. A method of manufacturing a porous body assembly, comprising joining the porous body holding member by brazing . The method for producing a porous body assembly according to claim 11, wherein the brazing material is a mixture of nickel brazing and an organic solvent, and the groove is filled with the mixture and brazed.

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