Patent Description:
There is known an electrolyzed liquid generator having an electrolytic part in which an anode, a conductive film, and a cathode are stacked, the electrolytic part generating ozone (electrolytic product) to provide ozone water (electrolytic liquid) (see, for example, <CIT> and <CIT>).

The electrolytic part described in <CIT> and <CIT> has a groove in which a hole formed in the cathode as an electrode and a hole formed in the conductive film communicate with each other. Then, by applying a voltage to the electrolytic part, water introduced into the groove is electrolyzed to generate ozone.

In the above known art, the electrolytic part is accommodated in a housing with an outer periphery in contact with an inner surface of the housing.

However, although the outer periphery of the electrolytic part is in contact with the inner surface of the housing, a minute gap is formed between the outer periphery of the electrolytic part and the inner surface of the housing due to disposition during stacking. Thus, there is a possibility that water may enter and stay in the minute gap formed around the electrolytic part.

When water is electrolyzed to generate ozone with water staying around the electrolytic part in this way, a pH value of the water accumulated around the electrolytic part rises, scale mainly including a calcium component is likely to occur, and the scale may accumulate in the minute gap.

If the scale generated by electrolysis of the water accumulates in the minute gap formed around the electrolytic part, the housing and the electrolytic part may be compressed and deformed by the scale accumulated in the minute gap.

Thus, the present invention allows for obtaining an electrolyzed liquid generator capable of suppressing pressure on a housing and an electrolytic part by scale.

The electrolyzed liquid generator of the present invention comprises an electrolytic part having a stacked body in which a conductive film is stacked to be interposed between a cathode and an anode and a housing in which the electrolytic part is disposed, the electrolytic part being configured to electrolyze a liquid.

The housing includes a channel having an inlet port into which a liquid supplied to the electrolytic part flows and an outlet port from which an electrolyzed liquid generated in the electrolytic part flows out, and having a liquid flow direction in a direction intersecting a stacking direction of the stacked body.

The electrolytic part includes a groove opening to the channel and having an interface between the conductive film and the cathode and an interface between the conductive film and the anode, the interfaces at least partially being exposed.

The electrolyzed liquid generator according to the present invention has a space between at least one of an outer periphery of the cathode and an outer periphery of the anode, and an inner surface of the housing when viewed along the fliquid flow direction, wherein the outer periphery of the cathode is a side surface of the cathode and the outer periphery of the anode is a side surface of the anode.

The present invention makes it possible to obtain the electrolyzed liquid generator capable of suppressing pressure on the housing and the electrolytic part by scale.

Hereinafter, exemplary embodiments of the present disclosure will be described with reference to the drawings. Note that the present disclosure is not limited by the exemplary embodiments.

In the following, as an electrolyzed liquid generator, an example of an ozone water generator that generates ozone (electrolytic product) and dissolves the ozone in water (liquid) to generate ozone water (electrolyzed water: electrolyzed liquid).

Ozone water, which is effective for sterilization and decomposition of organic substances, is widely used in the fields of water treatment, food, and medicine, and has the advantage of being non-persistent and producing no byproducts.

Further, in the following description, an extending direction of a channel (a direction in which the liquid flows) is X, a width direction of the channel (a direction across the liquid flow direction) is Y, a direction in which electrodes and a conductive film are stacked is stacking direction Z (see <FIG>).

In the following exemplary embodiments, the stacking direction Z is a vertical direction in which the electrolyzed liquid generator is disposed such that an electrode case lid is on an upper side.

As shown in <FIG> and <FIG>, ozone water generator <NUM> according to the present exemplary embodiment has housing <NUM>, and channel <NUM> is formed inside housing <NUM> (see <FIG>).

Inside housing <NUM> in which channel <NUM> is formed, electrolytic part <NUM> is disposed so as to face channel <NUM>. Then, water flowing through channel <NUM> is electrolyzed by electrolytic part <NUM>. In the present exemplary embodiment, as shown in <FIG> and <FIG>, electrolytic part <NUM> is disposed in housing <NUM> such that upper surface (one surface in stacking direction Z) 50a faces channel <NUM>.

As shown in <FIG> and <FIG>, electrolytic part <NUM> has stacked body <NUM>. Stacked body <NUM> has anode (electrode) <NUM>, cathode (electrode) <NUM>, and conductive film <NUM>. Conductive film <NUM> is stacked to be interposed between anode (electrode) <NUM> and cathode (electrode) <NUM>, that is, between a plurality of electrodes adjacent to each other.

Channel <NUM> includes inlet port <NUM> in which the liquid supplied to electrolytic part <NUM> flows, and outlet port <NUM> from which the ozone water generated by electrolytic part <NUM> flows out. Channel <NUM> is formed in housing <NUM> such that liquid flow direction X intersects stacking direction Z of stacked body <NUM>.

Further, in stacked body <NUM>, a plurality of grooves <NUM> is formed. The plurality of grooves <NUM> is open to channel <NUM>, and interface <NUM> and interface <NUM> between conductive film <NUM> and the plurality of electrodes (anode <NUM> and cathode <NUM>) are at least partially exposed (see <FIG>). It is sufficient that at least one groove <NUM> is formed in stacked body <NUM>.

Grooves <NUM> formed in stacked body <NUM> allow the water supplied into channel <NUM> from inlet port <NUM> to be introduced into grooves <NUM>. Then, the water introduced into grooves <NUM> is electrolyzed to cause an electrochemical reaction, and ozone water in which ozone is dissolved as an electrolytic product is generated.

Housing <NUM> is formed using, for example, a non-conductive resin such as polyphenylene sulfide (PPS). In the present exemplary embodiment, housing <NUM> includes electrode case <NUM> and electrode case lid <NUM>. Electrode case <NUM> is provided with recess <NUM> opening upward and accommodating electrolytic part <NUM>. Electrode case lid <NUM> covers an opening of electrode case <NUM>.

As shown in <FIG>, electrode case <NUM> includes bottom wall <NUM> and peripheral wall <NUM> connected to a peripheral edge of bottom wall <NUM>, and has a substantially box shape opening upward. That is, recess <NUM> opening upward and defined by inner surface 21a of bottom wall <NUM> and inner surface 22a of peripheral wall <NUM> is formed in electrode case <NUM>.

Then, electrolytic part <NUM> is introduced into recess <NUM> from the opening (from above), and electrolytic part <NUM> is accommodated in recess <NUM>. The opening of recess <NUM> is formed so as to be larger than a contour of electrolytic part <NUM> when viewed along stacking direction Z. Electrolytic part <NUM> whose stacking direction coincides with the vertical direction (stacking direction Z) can be inserted into recess <NUM> in the same attitude.

Further, in the present exemplary embodiment, electrolytic part <NUM> is accommodated in recess <NUM> via elastic body <NUM>. That is, electrolytic part <NUM> is accommodated in recess <NUM> with elastic body <NUM> interposed between electrolytic part <NUM> and electrode case <NUM> and with elastic body <NUM> in contact with lower surface 50b of electrolytic part <NUM>. Elastic body <NUM> is formed using elastic materials such as rubber, plastic, and metal springs.

In the present exemplary embodiment, when electrode case lid <NUM> is attached to electrode case <NUM>, channel <NUM> is formed between electrolytic part <NUM> and electrode case lid <NUM>. Channel <NUM> may be formed such that a sectional area (an area of channel <NUM> cut at a plane orthogonal to liquid flow direction X) at a part facing electrolytic part <NUM> is preferably substantially identical at a plurality of positions.

Electrode case lid <NUM> includes a lid body <NUM> having a substantially rectangular plate shape, and protrusion <NUM> protruding downward from a lower center of lid body <NUM> and inserted into recess <NUM> of electrode case <NUM>.

Fitting recess <NUM> for welding is formed on an entire peripheral edge of protrusion <NUM> of lid body <NUM>. Then, when electrode case lid <NUM> is attached to electrode case <NUM>, fitting protrusion <NUM> for welding formed around an entire periphery of the opening of electrode case <NUM> is inserted into fitting recess <NUM> (see <FIG>).

In the present exemplary embodiment, flange <NUM> extending substantially horizontally toward the outside is continuously provided entirely at an upper end of peripheral wall <NUM> of electrode case <NUM>. Fitting protrusion <NUM> protruding upward is formed on flange <NUM> so as to surround the opening of electrode case <NUM>. Then, electrode case lid <NUM> and electrode case <NUM> are welded in a state where fitting protrusion <NUM> is inserted into fitting recess <NUM> while protrusion <NUM> is inserted into recess <NUM>.

Electrode case lid <NUM> can be also attached to electrode case <NUM> by screwing electrode case lid <NUM> to electrode case <NUM> with a sealing material interposed between electrode case lid <NUM> and electrode case <NUM>.

Further, protruding parts <NUM> pressing electrolytic part <NUM> downward are formed at both ends and a center in width direction Y on a lower surface of protrusion <NUM>. Electrolytic part <NUM> is accommodated in recess <NUM> via elastic body <NUM>, and electrode case lid <NUM> is attached to electrode case <NUM>. At this time, electrolytic part <NUM> is pressed downward by protruding parts <NUM> provided on electrode case lid <NUM>.

As described above, in the present exemplary embodiment, when electrolytic part <NUM> is pressed downward, a constant pressure is applied entirely to electrolytic part <NUM> by elastic body <NUM>. This can further enhance adhesion of each member configuring electrolytic part <NUM>.

In the present exemplary embodiment, elastic body <NUM> is provided with a plurality of through-holes <NUM> penetrating in stacking direction Z along a longitudinal direction (liquid flow direction X). As a result, elastic body <NUM> can be deformed toward through-holes <NUM> when pressed by electrolytic part <NUM>. Deforming elastic body <NUM> toward through-holes <NUM> in this way suppresses a compression of electrode case <NUM> by elastic body <NUM> pressed by electrolytic part <NUM>.

In the present exemplary embodiment, groove <NUM> is provided on an upper surface of lid body <NUM>. This groove <NUM> can be used for positioning and preventing catch and reverse insertion when ozone water generator <NUM> is fixed. By providing groove <NUM>, ozone water generator <NUM> can be incorporated into a device that needs ozone generation more easily and without mistakes.

Ozone water generator <NUM> is used while incorporated in other equipment and facilities. Upon incorporation of ozone water generator <NUM> into other equipment and facilities, ozone water generator <NUM> is preferably disposed in an upright position such that inlet port <NUM> is at a bottom and outlet port <NUM> is at a top. Such ozone water generator <NUM> disposed with the inlet port at the bottom and the outlet port at the top allows the ozone generated at an electrode interface to be quickly separated from the electrode interface by buoyancy. That is, the ozone generated at the electrode interface can be quickly separated from the electrode interface before bubble growth. This allows the ozone to be easily dissolved in water and improves generation efficiency of the ozone water. The disposition of ozone water generator <NUM> is not limited to this, but ozone water generator <NUM> can be disposed as appropriate.

Next, a specific configuration of electrolytic part <NUM> will be described.

Electrolytic part <NUM> has a substantially rectangular shape in which liquid flow direction X is the longitudinal direction in a plan view (as viewed from stacking direction Z). Electrolytic part <NUM> includes stacked body <NUM> configured by sequentially stacking anode <NUM>, conductive film <NUM>, and cathode <NUM>. As described above, in the present exemplary embodiment, stacked body <NUM> is stacked such that conductive film <NUM> is interposed between anode <NUM> and cathode <NUM>, which are a plurality of electrodes adjacent to each other.

Feeder <NUM> is stacked on a lower side of anode <NUM>, and electricity is supplied to anode <NUM> via feeder <NUM>.

In the present exemplary embodiment, feeder <NUM>, anode <NUM>, conductive film <NUM>, and cathode <NUM> all have a rectangular plane shape in a plan view, with liquid flow direction X as the longitudinal direction and width direction Y as a lateral direction, and have a flat plate shape with a thickness in stacking direction Z. At least one of anode <NUM> and cathode <NUM> may be film-like, mesh-like or linear.

Feeder <NUM> can be formed by using, for example, titanium. Feeder <NUM> is in contact with an opposite side of anode <NUM> of a side where anode <NUM> is in contact with conductive film <NUM>. Further, feed shaft 53b for the anode is electrically connected to a first end of feeder <NUM> in the longitudinal direction (upstream in liquid flow direction X) via spiral spring 53a. Feed shaft 53b is inserted into through-hole <NUM> formed on a first end in liquid flow direction X of bottom wall <NUM>. A part of feed shaft 53b protruding to the outside of electrode case <NUM> is electrically connected to a positive electrode of a power supply unit (not shown).

Anode <NUM> is formed, for example, by forming a conductive diamond film on a conductive substrate formed by using silicon and having a width of about <NUM> and a length of about <NUM>. Further, for example, two conductive substrates having a width of about <NUM> and a length of about <NUM> may be arranged side by side. The conductive diamond film has boron doped conductivity. The conductive diamond film is formed on the conductive substrate with a film thickness of about <NUM> pm by a plasma chemical vapor deposition (CVD) method.

Conductive film <NUM> is disposed on anode <NUM> on which the conductive diamond film is formed. Conductive film <NUM> is a proton conductive ion exchange film and has a thickness of about <NUM> pm to <NUM> pm inclusive. Conductive film <NUM> is provided with a plurality of conductive film holes (conductive film grooves) 56c penetrating in a thickness direction (stacking direction Z) (see <FIG>).

In the present exemplary embodiment, each conductive film hole 56c has a substantially identical shape. Specifically, each conductive film hole 56c has an elongated hole shape elongated in width direction Y The plurality of conductive film holes 56c is provided so as to be aligned in a row at a predetermined pitch along the longitudinal direction (liquid flow direction X). A shape and arrangement of conductive film holes 56c may be different from an example shown in <FIG>. Further, it is sufficient that at least one conductive film hole 56c is formed.

Cathode <NUM> is disposed on conductive film <NUM>. Cathode <NUM> is formed by, for example, a titanium electrode plate having a thickness of about <NUM>. Further, feed shaft 55b for the cathode is electrically connected to a second end of cathode <NUM> in the longitudinal direction (downstream in liquid flow direction X) via spiral spring 55a. Feed shaft 55b is inserted into through-hole <NUM> formed on a second end in liquid flow direction X of bottom wall <NUM>. Apart of feed shaft 55b protruding to the outside of electrode case <NUM> is electrically connected to a negative electrode of a power supply unit (not shown).

Further, a plurality of cathode holes (cathode grooves: electrode grooves) 55e penetrating in the thickness direction is formed in cathode <NUM> (see <FIG>). In the present exemplary embodiment, each cathode hole 55e has a substantially identical shape. Specifically, each cathode hole 55e has a V-shape in which bent part 55f is disposed downstream in a plan view.

The plurality of cathode holes 55e is provided so as to be aligned in a row at a predetermined pitch along the longitudinal direction (liquid flow direction X).

The pitch of cathode holes 55e may be identical to the pitch of conductive film holes 56c, or may be different from the pitch of conductive film holes 56c. Further, a shape and arrangement of cathode holes 55e may be different from those of an example of <FIG>. Further, it is sufficient that at least one cathode hole 55e is formed.

As described above, in the present exemplary embodiment, the shapes (at least one of contour or size) of conductive film holes 56c and cathode holes 55e are different in a plan view (as viewed along stacking direction of stacked body <NUM>). Thus, even if conductive film <NUM> is displaced relative to cathode (electrode) <NUM> in a direction intersecting stacking direction Z, a contact area between conductive film <NUM> and cathode (electrode) <NUM> can be prevented from changing. The shapes (contour and size) of conductive film holes 56c and cathode holes 55e in a plan view can be identical.

Further, when conductive film <NUM> and cathode <NUM> are stacked, at least a part of mutual holes (cathode holes 55e and conductive film holes 56c) needs to communicate with each other, and a sufficient electrical contact area needs to be secured. As long as the above conditions are satisfied, conductive film <NUM> and cathode <NUM> may have an identical or different projection dimension (size in a plan view).

In the present exemplary embodiment, cathode <NUM> has a larger width in width direction Y than conductive film <NUM> (see <FIG>).

The projection dimension of anode <NUM> may be identical to or different from at least one of conductive film <NUM> or cathode <NUM>. However, anode <NUM> is preferably large enough to close conductive film holes 56c from below when anode <NUM> is stacked.

In the present exemplary embodiment, anode <NUM> and conductive film <NUM> have a substantially identical projection dimension.

Further, feeder <NUM> is preferably capable of efficiently supplying electricity to anode <NUM>, and elastic body <NUM> preferably has such a projection dimension as to be pressed by entire lower surface of feeder <NUM> (lower surface 50b of electrolytic part <NUM>).

In the present exemplary embodiment, a dimension of feeder <NUM> in width direction Y is smaller than those of anode <NUM> and conductive film <NUM>, and a projection dimension of elastic body <NUM> in width direction Y is approximately identical to those of anode <NUM> and conductive film <NUM>. The projection dimensions of feeder <NUM> and elastic body <NUM> can be varied.

Electrolytic part <NUM> having such a configuration can be accommodated in recess <NUM> of electrode case <NUM> by the following method, for example.

First, feeder <NUM> is disposed on elastic body <NUM> inserted in recess <NUM> of electrode case <NUM>. Specifically, feeder <NUM> is inserted into recess <NUM> of electrode case <NUM> with a tip of feed shaft 53b facing downward. Then, feeder <NUM> is stacked on elastic body <NUM> by inserting feed shaft 53b into first through-hole <NUM>.

Next, anode <NUM> is inserted into recess <NUM> of electrode case <NUM> and stacked on feeder <NUM>.

Next, conductive film <NUM> is inserted into recess <NUM> of electrode case <NUM> and stacked on anode <NUM>.

Next, cathode <NUM> is inserted into recess <NUM> of electrode case <NUM> with the tip of feed shaft 55b facing downward, feed shaft 55b is inserted into second through-hole <NUM>, and cathode <NUM> is stacked on conductive film <NUM>.

Next, O-ring <NUM>, first washer <NUM>, second washer <NUM>, and hexagon nut <NUM> are each inserted into the part of feed shaft 53b for the anode protruding to the outside of electrode case <NUM> and the part of feed shaft 55b for the cathode protruding to the outside of the electrode case <NUM>.

Electrolytic part <NUM> is accommodated in and fixed to recess <NUM> while being pressed against elastic body <NUM> by tightening hexagon nut <NUM>.

In the present exemplary embodiment, electrode case lid <NUM> is moved relative to electrode case <NUM> in stacking direction Z, and thus while protrusion <NUM> is inserted into recess <NUM>, fitting protrusion <NUM> is inserted into fitting recess <NUM> for welding.

As described above, ozone water generator <NUM> according to the present exemplary embodiment is assembled only by moving each member relative to electrode case <NUM> in the vertical direction (stacking direction Z).

Next, an operation and action of ozone water generator <NUM> will be described.

First, in order to supply water to ozone water generator <NUM>, water is supplied from inlet port <NUM> to channel <NUM>. Part of water supplied to channel <NUM> flows into grooves <NUM> and is brought in contact with interface <NUM> and interface <NUM> of grooves <NUM>.

In such a state (with electrolytic part <NUM> immersed in water by the supplied water), a power supply unit (not shown) applies a voltage between anode <NUM> and cathode <NUM> of electrolytic part <NUM>. Then, a potential difference is generated between anode <NUM> and cathode <NUM> via conductive film <NUM>. By generating the potential difference between anode <NUM> and cathode <NUM>, anode <NUM>, conductive film <NUM>, and the cathode <NUM> are energized and electrolyzed mainly in the water in grooves <NUM> to generate ozone near interface <NUM> between conductive film <NUM> and anode <NUM>.

Ozone generated near interface <NUM> between conductive film <NUM> and anode <NUM> dissolves in the water while being carried to downstream of channel <NUM> along the water flow. By dissolving the ozone in the water in this way, dissolved ozone water (ozone water: electrolyzed liquid) is generated.

Ozone water generator <NUM> is applicable to an electric device utilizing the electrolyzed liquid generated by the electrolyzed liquid generator, and a liquid modifier or the like including the electrolyzed liquid generator.

Examples of electrical equipment and liquid modifier include water treatment equipment such as a water purifier, washing machine, dishwasher, warm water washing toilet seat, refrigerator, hot and cold water supply apparatus, sterilizer, medical equipment, air conditioner, and kitchen equipment.

The present exemplary embodiment prevents scale generated by the electrolysis of water from compressing peripheral wall <NUM> (housing <NUM>) and electrolytic part <NUM>.

Specifically, space S is formed between an outer periphery of at least one of cathode <NUM> or anode <NUM> and inner surface 22a (inner surface of housing <NUM>) of peripheral wall <NUM>, thereby preventing the water from staying in a periphery of electrolytic part <NUM>.

That is, purposely providing space S for flowing water between the periphery of electrolytic part <NUM> and peripheral wall <NUM> (housing <NUM>) makes it possible to prevent the water from staying in the periphery of electrolytic part <NUM>. Space S has a gap larger than manufacturing tolerance caused when ozone water generator <NUM> is assembled.

In the present exemplary embodiment, as described above, cathode <NUM> has a larger width in width direction Y than conductive film <NUM>. Further, anode <NUM> and conductive film <NUM> have a substantially identical projection dimension.

With stacked body <NUM> formed, both ends of cathode <NUM> in width direction Y protrude outward from anode <NUM> and conductive film <NUM>.

That is, outer periphery (side surface) 55c of cathode <NUM> protrudes outward from outer periphery (side surface) 54a of anode <NUM> in width direction Y (the direction intersecting stacking direction Z). Parts of cathode <NUM> protruding outward in width direction Y from outer periphery 54a of anode <NUM> are defined as cathode protrusions <NUM> (see <FIG>).

Cathode protrusions <NUM> protruding outward from anode <NUM> and conductive film <NUM> are formed at both ends of cathode <NUM> in width direction Y in this way, and space S is formed between inner surface 22a of peripheral wall <NUM> and anode <NUM> when stacked body <NUM> is accommodated in recess <NUM>. Further, space S is also formed below cathode protrusions <NUM> of cathode <NUM> (closer to anode <NUM> in stacking direction Z).

In the present exemplary embodiment, space S has an anode-side space (second space) S2 formed between outer periphery (side surface) 54a of anode <NUM> and inner surface (inner surface of housing <NUM>) 22a of peripheral wall <NUM>. Further, space S has lower space (third space) S3 closer to anode <NUM> in stacking direction Z than cathode <NUM>.

Further, in the present exemplary embodiment, with cathode protrusions <NUM> formed, there is also a larger gap than the manufacturing tolerance between outer periphery (side surface) 55c of cathode <NUM> and inner surface (inner surface of housing <NUM>) 22a of peripheral wall <NUM>. That is, space S has cathode-side space (first space) S1 formed between outer periphery (side surface) 55c of cathode <NUM> and inner surface (inner surface of housing <NUM>) 22a of peripheral wall <NUM>.

As described above, in the present exemplary embodiment, space S having cathode-side space (first space) S1, anode-side space (second space) S2, and lower space (third space) S3 is formed between outer periphery (side surface) 51a of stacked body <NUM> and inner surface 22a of peripheral wall <NUM>.

In the present exemplary embodiment, space S is formed around at least the longitudinal direction of stacked body <NUM>. That is, at least a part of cathode-side space (first space) S1 is formed along side surface 51a. Side surface 51a is disposed on both sides of stacked body <NUM> in width direction Y and extends in the longitudinal direction (liquid flow direction X).

Cathode-side space (first space) S1 communicates with inlet port <NUM> and outlet port <NUM> to cause the water introduced into cathode-side space (first space) S1 to efficiently flow out from outlet port <NUM>. However, cathode-side space (first space) S1 may communicate with a middle of channel <NUM>.

Space S formed as described above can prevent the scale including calcium components and the like generated by electrolysis of water from accumulating between stacked body <NUM> and peripheral wall <NUM>.

For example, a pH value is likely to rise and scale is likely to occur near interface <NUM> between conductive film <NUM> and cathode <NUM>. However, when space S shown in the present exemplary embodiment is formed, a relatively large space is formed near interface <NUM>. That is, interface <NUM> outside in width direction Y is exposed to space S while a space of a predetermined size (lower space (third space) S3) is formed closely to anode <NUM> in stacking direction Z (on a lower side) and a space of a predetermined size (anode-side space (second space) S2) is formed outside in width direction Y.

Further, in the present exemplary embodiment, interface <NUM> outside in width direction Y is exposed to space S along the longitudinal direction (liquid flow direction X), and is substantially entire interface <NUM> outside in width direction Y is exposed to space S.

Thus, the water introduced into space S flows to downstream along liquid flow direction X. That is, the water introduced to near interface <NUM> exposed to space S also flows relatively quickly to downstream along liquid flow direction X. This allows the scale generated near interface <NUM> to flow to downstream before sticking to stacked body <NUM> and housing <NUM>. Space S formed as shown in the present exemplary embodiment in this way can prevent the water from staying near interface <NUM> where scale is likely to occur, and can cause the scale generated near interface <NUM> to quickly flow to downstream. As a result, it is possible to prevent the scale from accumulating between stacked body <NUM> and peripheral wall <NUM>. This can prevent the scale from pressing peripheral wall <NUM> (housing <NUM>) and electrolytic part <NUM>.

Though space S will prevent scale from accumulating between stacked body <NUM> and peripheral wall <NUM>, a relatively small amount of scale sticks to stacked body <NUM> and peripheral wall <NUM>. Thus, when ozone water generator <NUM> is used for a long period of time, the scale sticking to stacked body <NUM> and peripheral wall <NUM> can be so large to press peripheral wall part <NUM> (housing <NUM>) and electrolytic part <NUM>. Therefore, the size of space S is preferably set such that space S is not blocked by the sticking scale even after ozone water generator <NUM> is used for an expected life or longer by a normal method. The normal use method can be determined on the basis of, for example, quality of the water supplied into the housing (liquid quality of the liquid), an average flow speed and average flow rate of the water flowing in the housing, ozone generation efficiency (a voltage applied between the electrodes and an electrolytic area), and an expected frequency of use.

Further, a plurality of positioning protrusions <NUM> extending in the vertical direction (stacking direction Z) is formed inside peripheral wall <NUM> of electrode case <NUM> along the longitudinal direction (liquid flow direction X) (see <FIG>). Then, positioning protrusions <NUM> suppress a displacement of anode <NUM> during stacking (see <FIG>). In the present exemplary embodiment, positioning protrusions <NUM> are formed on the inner surface of peripheral wall <NUM> (an inner surface of the housing) at parts facing outer periphery 51a of stacked body <NUM>. Positioning protrusions <NUM> correspond to housing protrusions that protrude toward stacked body <NUM>.

With positioning protrusions (housing protrusions) <NUM> formed on peripheral wall <NUM>, space S is formed between outer periphery (side surface) 51a of stacked body <NUM> and inner surface 22a of peripheral wall <NUM> simply by disposing stacked body <NUM> in recess <NUM>.

In the present exemplary embodiment, conductive film recesses 56b as relief parts are formed in a recessed shape in outer periphery (side surface) 56a (a contour line in a plane) of conductive film <NUM> (see <FIG>). Conductive film recesses 56b are formed at parts corresponding to positioning protrusions (housing protrusions) <NUM> when stacked body <NUM> is disposed in recess <NUM>.

Thus, when conductive film <NUM> is inserted into recess <NUM> and stacked on anode <NUM>, conductive film recesses 56b face positioning protrusions <NUM> on peripheral wall <NUM> (see <FIG>). This can prevent conductive film <NUM>, which has been expanded with water, from interfering with positioning protrusions <NUM> when ozone water is generated, for example.

Further, cathode recesses 55d as relief parts are also formed in a recessed shape in outer periphery (side surface) 55c (a contour line in a plan view) of cathode <NUM> having a larger width in width direction Y than conductive film <NUM> (see <FIG>). Cathode recesses 55d are formed at parts corresponding to positioning protrusions (housing protrusions) <NUM> when stacked body <NUM> is disposed in recess <NUM>.

Thus, when cathode <NUM> is inserted into recess <NUM> and stacked on conductive film <NUM>, cathode recesses 55d face positioning protrusions <NUM> of peripheral wall <NUM> (see <FIG>). This can prevent cathode <NUM> having a larger dimension in width direction Y from interfering with positioning protrusions <NUM>. That is, cathode recesses 55d are formed so as to suppress the interference between cathode <NUM> and positioning protrusions <NUM> while increasing the surface area of cathode <NUM> as much as possible.

It is sufficient that space S is formed between the outer periphery of at least one of cathode <NUM> or anode <NUM> and inner surface 22a (inner surface of housing <NUM>) of peripheral wall <NUM>, and stacked body <NUM> may be configured as shown in <FIG>, for example.

Hereinafter, a modification of space S according to the present exemplary embodiment will be described.

First, in <FIG>, stacked body <NUM> is disclosed in which outer periphery (side surface) 56a of conductive film <NUM> protrudes from outer periphery (side surface) 54a of anode <NUM> in width direction Y (the direction intersecting stacking direction Z). Parts of conductive film <NUM> that protrudes outward in width direction Y from outer periphery 54a of anode <NUM> are defined as conductive film protrusions 56d.

Further, in <FIG>, cathode <NUM> and conductive film <NUM> have a substantially identical projection dimension.

As described above, in <FIG>, cathode protrusions <NUM> protruding outward from anode <NUM> are formed at both ends of conductive film <NUM> in width direction Y, and conductive film protrusions 56d protruding outside from anode <NUM> are formed at both ends of cathode <NUM> in width direction Y Then, when stacked body <NUM> is accommodated in recess <NUM>, space S having cathode-side space (first space) S1, anode-side space (second space) S2, and lower space (third space) S3 is formed between outer periphery (side surface) 51a of stacked body <NUM> and inner surface 22a of peripheral wall <NUM>.

Such a configuration can also prevent scale from accumulating between stacked body <NUM> and peripheral wall <NUM>.

Further, by expanding conductive film <NUM> to both ends in width direction Y of cathode <NUM>, conductive film <NUM> is also in contact with the lower surface of cathode protrusions <NUM>, thereby utilizing the enlarged area of cathode <NUM> more efficiently. That is, the contact area (electrolytic area) between cathode <NUM> and conductive film <NUM> can be further increased.

Next, similarly to stacked body <NUM> described in the present exemplary embodiment, <FIG> discloses stacked body <NUM> in which cathode protrusions <NUM> protruding outward from anode <NUM> and conductive film <NUM> are formed at both ends of cathode <NUM> in width direction Y.

Outer periphery (a side surface extending in the longitudinal direction) 55c of cathode <NUM> contacts inner surface 22a of peripheral wall <NUM>. Space S is formed between outer periphery 54a of anode <NUM> and inner surface 22a of peripheral wall <NUM>, and between outer periphery 56a of conductive film <NUM> and inner surface 22a of peripheral wall <NUM>. That is, when stacked body <NUM> is accommodated in recess <NUM>, space S having anode-side space (second space) S2 and lower space (third space) S3 is formed between outer periphery (side surface) 51a of stacked body <NUM> and inner surface 22a of peripheral wall <NUM>.

In the configuration shown in <FIG> (a configuration in which outer periphery 55c of cathode <NUM> is in contact with inner surface 22a of peripheral wall <NUM>), conductive film protrusions 56d described in <FIG> can be also formed on conductive film <NUM>. However, if conductive film protrusions 56d are also in contact with inner surface 22a of peripheral wall <NUM>, water may stay between interface <NUM> and inner surface 22a of peripheral wall <NUM>, where scale is likely to occur. Therefore, when conductive film protrusions 56d are formed, a gap (space S) is preferably formed between outer periphery 56a of conductive film <NUM> and inner surface 22a of peripheral wall <NUM> so as to prevent water from staying.

Next, <FIG> discloses stacked body <NUM> in which at least the parts extending in the longitudinal direction of outer periphery 54a of anode <NUM>, outer periphery 55c of cathode <NUM>, and outer periphery 56a of conductive film <NUM> are substantially flush with each other. Then, space S is formed between side surface 54a extending in the longitudinal direction of anode <NUM> and inner surface 22a of peripheral wall <NUM>, between side surface 55c extending in the longitudinal direction of cathode <NUM> and inner surface 22a of peripheral wall <NUM>, and between side surface 56a extending in the longitudinal direction of conductive film <NUM> and inner surface 22a of peripheral wall <NUM>. That is, when stacked body <NUM> is accommodated in recess <NUM>, space S having cathode-side space (first space) S1 and anode-side space (second space) S2 is formed between outer periphery (side surface) 51a of stacked body <NUM> and inner surface 22a of peripheral wall <NUM>.

Next, <FIG> discloses stacked body <NUM> in which anode <NUM> is increased in size in width direction Y as compared with conductive film <NUM>, and cathode <NUM> and conductive film <NUM> have a substantially identical projection dimension.

Then, when stacked body <NUM> is formed, both ends of anode <NUM> in width direction Y protrude outward from cathode <NUM> and conductive film <NUM>, and parts of anode <NUM> protruding outward in width direction Y from outer periphery 55c of cathode <NUM> are defined as anode protrusions 54b.

Anode protrusions 54b protruding outward from cathode <NUM> and conductive film <NUM> are formed at both ends of anode <NUM> in width direction Y in this way, and space S is formed between inner surface 22a of peripheral wall <NUM> and cathode <NUM> when stacked body <NUM> is accommodated in recess <NUM>. Further, space S is also formed above anode protrusions 54b of anode <NUM> (closer to cathode <NUM> in stacking direction Z).

As described above, in <FIG>, space S has cathode-side space (first space) S1 formed between outer periphery (side surface) 55c of cathode <NUM> and inner surface 22a of peripheral wall <NUM> (inner surface of housing <NUM>). Further, space S also has upper space (fourth space) S4 closer to cathode <NUM> in stacking direction Z than anode <NUM> is.

Further, in <FIG>, with the anode protrusions 54b formed, there is also a gap exceeding the manufacturing tolerance between outer periphery (side surface) 54a of anode <NUM> and inner surface 22a of peripheral wall <NUM> (inner surface of housing <NUM>). That is, space S has anode-side space (second space) S2 formed between outer periphery (side surface) 54a of anode <NUM> and inner surface 22a of peripheral wall <NUM> (inner surface of housing <NUM>).

As described above, in <FIG>, space S having cathode-side space (first space) S1, anode-side space (second space) S2, and upper space (fourth space) S4 is formed between outer periphery (side surface) 51a of stacked body <NUM> and inner surface 22a of peripheral wall <NUM>.

In the configuration shown in <FIG>, conductive film protrusions 56d described in <FIG> can be formed on conductive film <NUM>. That is, as described above, in <FIG>, anode protrusions 54b protruding outward from cathode <NUM> can be formed at both ends of conductive film <NUM> in width direction Y, and conductive film protrusions 56d protruding outside from cathode <NUM> can be formed at both ends of anode <NUM> in width direction Y.

Further, by expanding conductive film <NUM> to both ends in width direction Y of anode <NUM>, conductive film <NUM> is also in contact with an upper surface of anode protrusions 54b, thereby utilizing an enlarged area of anode <NUM> more efficiently. That is, the contact area (electrolytic area) between anode <NUM> and conductive film <NUM> can be further increased.

Next, similarly to stacked body <NUM> described in <FIG>, <FIG> discloses stacked body <NUM> in which cathode protrusions 54b protruding outward from cathode <NUM> and conductive film <NUM> are formed at both ends of anode <NUM> in width direction Y.

Then, outer periphery (side surface extending in the longitudinal direction) 54a of anode <NUM> is in contact with inner surface 22a of peripheral wall <NUM>. Space S is formed between outer periphery 55c of cathode <NUM> and inner surface 22a of peripheral wall <NUM>, and between outer periphery 56a of conductive film <NUM> and inner surface 22a of peripheral wall <NUM>. That is, when stacked body <NUM> is accommodated in recess <NUM>, space S having cathode-side space (first space) S1 and upper space (fourth space) S4 is formed between outer periphery (side surface) 51a of stacked body <NUM> and inner surface 22a of peripheral wall <NUM>.

In the configuration shown in <FIG> (a configuration in which outer periphery 54a of anode <NUM> is in contact with inner surface 22a of peripheral wall <NUM>), conductive film protrusions 56d described in <FIG> can be also formed on conductive film <NUM>. However, if conductive film protrusions 56d are also in contact with inner surface 22a of peripheral wall <NUM>, water may stay between interface <NUM> and inner surface 22a of peripheral wall <NUM>, where scale is likely to occur. Therefore, when conductive film protrusions 56d are formed, a gap (space S) is preferably formed between outer periphery 56a of conductive film <NUM> and inner surface 22a of peripheral wall <NUM> so as to prevent water from staying.

As described above, ozone water generator (electrolyzed liquid generator) <NUM> according to the present exemplary embodiment has stacked body <NUM> such that conductive film <NUM> is interposed between anode <NUM> and cathode <NUM> (between the electrodes adjacent to each other), and includes electrolytic part <NUM> electrolyzing water (liquid). Further, ozone water generator <NUM> includes housing <NUM> in which electrolytic part <NUM> is disposed.

Housing <NUM> includes channel <NUM> having inlet port <NUM> into which the water supplied to electrolytic part <NUM> flows and outlet port <NUM> from which the ozone water (electrolyzed water: electrolyzed liquid) generated by electrolytic part <NUM> flows out, and having liquid flow direction X in a direction intersecting stacking direction Z of stacked body <NUM>.

In electrolytic part <NUM>, grooves <NUM> are formed. Grooves <NUM> are open to channel <NUM>, and interface <NUM> between conductive film <NUM> and electrode (anode <NUM>) and interface <NUM> between conductive film <NUM> and the electrode (cathode <NUM>) are at least partially exposed.

In the present exemplary embodiment, the electrodes adjacent to each other are cathode <NUM> and anode <NUM>, and space S preventing the water from staying is formed between the outer periphery of at least one of cathode <NUM> and anode <NUM>, and inner surface (inner surface of housing) 22a of peripheral wall <NUM>.

Further, space S may have cathode-side space (first space) S1 formed between outer periphery 55c of cathode <NUM> and inner surface (inner surface of housing) 22a of peripheral wall <NUM>.

Further, space S may have anode-side space (second space) S2 formed between outer periphery 54a of anode <NUM> and inner surface (inner surface of housing) 22a of peripheral wall <NUM>.

Further, space S may have lower space (third space) S3 closer to anode <NUM> in stacking direction Z than cathode <NUM>.

Space S described above, formed around electrolytic part <NUM>, makes it possible to prevent the water from staying around electrolytic part <NUM>. The water is prevented from staying around electrolytic part <NUM>, and then the scale is prevented from sticking around electrolytic part <NUM> and to peripheral wall <NUM> (housing <NUM>).

Further, even if the scale sticks around electrolytic part <NUM> and to peripheral wall <NUM>, space S formed between electrolytic part <NUM> and peripheral wall <NUM> prevents the scale from pressing electrolytic part <NUM> and peripheral wall <NUM> and suppresses deformation (deflection or the like) of electrolytic part <NUM>. By suppressing the deformation of electrolytic part <NUM>, a contact between anode <NUM> and conductive film <NUM> and a contact between conductive film <NUM> and cathode <NUM> are suppressed from being nonuniform. That is, anode <NUM> and conductive film <NUM> can be in contact with each other more uniformly, and conductive film <NUM> and cathode <NUM> can be in contact with each other more uniformly.

Space S, formed between electrolytic part <NUM> and peripheral wall <NUM> in this way, suppresses the deformation of electrolytic part <NUM> due to the scale sticking, and allows stacked body <NUM> in electrolytic part <NUM> to be in contact more uniformly. Then, more uniform contact of stacked body <NUM> makes it possible to more stably secure an energized area (for example, an electrolytic area between conductive film <NUM> and cathode <NUM>). Then, the energized area, secured more stably, can make a current density of a current flowing through electrolytic part <NUM> more uniform, and can further stabilize the ozone (electrolytic product) generation efficiency.

As described above, the present exemplary embodiment makes it possible to obtain ozone water generator <NUM> capable of suppressing the pressure on peripheral wall <NUM> (housing <NUM>) and electrolytic part <NUM> by the scale.

Further, outer periphery 55c of cathode <NUM> may protrude in width direction Y (the direction intersecting stacking direction Z) from outer periphery 54a of anode <NUM>.

This increases the area of cathode <NUM> by an amount of protrusion in width direction Y from outer periphery 54a of the anode <NUM>. Thus, the current density of the current flowing through cathode <NUM> decreases, thereby preventing the scale generated around cathode <NUM> by electrolysis from accumulating.

Further, outer periphery 56a of conductive film <NUM> may protrude from outer periphery 54a of anode <NUM> in width direction Y (the direction intersecting stacking direction Z).

This can also suppress the pressure of the scale on electrolytic part <NUM> and peripheral wall <NUM>, and further stabilize the ozone (electrolytic product) generation efficiency.

Further, by increasing the size of cathode <NUM> and conductive film <NUM> in width direction Y as compared with anode <NUM>, conductive film <NUM> is also in contact with a lower surface of both ends of cathode <NUM> in width direction Y, thereby utilizing the increased area of cathode <NUM> more efficiently. That is, the contact area (electrolytic area) between cathode <NUM> and conductive film <NUM> can be further increased.

Further, space S may be formed around at least the longitudinal direction of stacked body <NUM>.

This can more reliably prevent the water from staying around electrolytic part <NUM>, and further stabilize the ozone (electrolytic product) generation efficiency.

Further, positioning protrusions (housing protrusions) <NUM> protruding toward stacked body <NUM> may be formed on inner surface 22a of peripheral wall <NUM> (inner surface of the housing) at parts facing outer periphery 51a of stacked body <NUM>.

By doing so, space S can be formed between outer periphery (side surface) 51a of stacked body <NUM> and inner surface 22a of peripheral wall <NUM> simply by disposing stacked body <NUM> in recess <NUM>. Thus, a gap (space S) can be more reliably secured between stacked body <NUM> and peripheral wall <NUM>.

Further, cathode recesses 55d may be formed at parts of outer periphery 55c of cathode <NUM> corresponding to positioning protrusions (housing protrusions) <NUM>.

This can prevent cathode <NUM> from interfering with positioning protrusions (housing protrusions) <NUM> when cathode <NUM> is disposed in recess <NUM>. Thus, cathode <NUM> having an extremely large surface area can be disposed in the recess <NUM>.

Further, conductive film recesses 56d may be formed at parts of outer periphery 56a of conductive film <NUM> corresponding to positioning protrusions (housing protrusions) <NUM>.

This makes it possible to prevent conductive film <NUM>, expanded with water during the generation of the ozone water from interfering with positioning protrusions (housing protrusions) <NUM>. That is, expanded conductive film <NUM> can be prevented from interfering with positioning protrusions (housing protrusions) <NUM> and being deformed. As a result, the contact of stacked body <NUM> can be more uniform, and the ozone (electrolytic product) generation efficiency can be further stabilized.

Although the preferred exemplary embodiment of the present disclosure has been described above, the present disclosure is not limited to the above exemplary embodiment, and various modifications can be made.

For example, in the above exemplary embodiment, the ozone water generator that generates ozone water by generating ozone and dissolving the ozone in water has been exemplified. However, a substance to be generated is not limited to ozone. For example, hypochlorous acid may be generated and used for sterilization, water treatment, and the like. Further, it is also possible to use an apparatus generating oxygen water, hydrogen water, chlorine-containing water, hydrogen peroxide solution, or the like.

Note that these electrolyzed liquid generators can also be used while incorporated in other equipment and facilities. When incorporated into other equipment and facilities, the electrolyzed liquid generator is preferably arranged upright such that the inlet port is at the bottom and the outlet port is at the top as in ozone water generator <NUM>. However, the arrangement is not limited to this, and can be disposed as appropriate.

Further, anode <NUM> can include a material selected from, for example, conductive silicon, conductive diamond, titanium, platinum, lead oxide, tantalum oxide, and the like. Any material may be used that is an electrode conductive and durable enough to generate electrolyzed water. Further, when anode <NUM> is a diamond electrode, a manufacturing method of anode <NUM> is not limited to a manufacturing method by film formation. It is also possible to configure a substrate using a material other than metal.

Further, it is sufficient that cathode <NUM> is an electrode having conductivity and durability, and may include a material selected from, for example, platinum, titanium, stainless steel, conductive silicon, and the like.

Further, in the above exemplary embodiment, peripheral wall <NUM> provided with positioning protrusions (housing protrusions) <NUM> extending in stacking direction Z has been illustrated, but the shape of the housing protrusions can be various. For example, the housing protrusions extending in the longitudinal direction (liquid flow direction X) may be provided at a part of peripheral wall <NUM> corresponding to outer periphery (side surface extending in the longitudinal direction) 54a of anode <NUM>. This can more reliably secure space S between stacked body <NUM> and peripheral wall <NUM>, and prevent the housing protrusions from obstructing the flow of water (liquid) in space S.

Further, specifications of the housing, electrolytic part, and other details (shape, size, layout, and the like) can be changed as appropriate.

Here, as a second exemplary embodiment of the present disclosure, a configuration of stacked body <NUM> of ozone water generator <NUM> of the present disclosure will be described in more detail.

Components described in the first exemplary embodiment are designated by the same reference marks, and the description thereof will not be repeated. A basic configuration of ozone water generator <NUM> is common to that of the first exemplary embodiment.

In the above known art, the hole formed in the cathode and the hole formed in the conductive film have an identical shape. That is, the hole in the cathode and the hole in the conductive film are formed to have the identical contour and size in a plan view. Then, the grooves are formed by stacking the cathode and the conductive film so as to overlap the contour lines of the holes.

However, in the known art, when the cathode is displaced relative to the conductive film in the direction intersecting the stacking direction, the electrolytic area (contact area) between the cathode and the conductive film changes. Thus, the current density of the current flowing through the electrolytic part changes, and the ozone generation efficiency fluctuates.

The configuration described below makes it possible to obtain an electrolyzed liquid generator capable of further stabilizing the generation efficiency of the electrolytic product.

In the following example, it is assumed that anode <NUM> and conductive film <NUM> have a substantially identical projection dimension.

Then, during the formation of stacked body <NUM>, both ends of cathode <NUM> in the width direction protrude outward from anode <NUM> and conductive film <NUM> (a configuration as shown in <FIG>).

That is, with both ends of cathode <NUM> in the width direction protruding outward from anode <NUM> and conductive film <NUM>, space S is formed at least between inner surface 22a of peripheral wall <NUM> and anode <NUM> when stacked body <NUM> is accommodated in recess <NUM>. This space S is a space formed in order to prevent the water from staying between an outer edge of stacked body <NUM> and peripheral wall <NUM>.

Further, in the present exemplary embodiment, as shown in <FIG>, space S is also formed between inner surface 22a of peripheral wall <NUM> and cathode <NUM>.

Further, the configuration of stacked body <NUM> may be based on the above configurations shown in <FIG>. That is, the basic configuration of the first exemplary embodiment and a detailed configuration described in the second exemplary embodiment can be combined.

In the following example, the generation efficiency of ozone <NUM> can be further stabilized.

Specifically, the shapes (contour and size) of conductive film holes 56c and cathode holes 55e are different from each other in a plan view (as viewed along the stacking direction of stacked body <NUM>).

Each conductive film hole 56c is formed into an elongated hole-like shape elongated in width direction Y, and each cathode hole 55e is formed in a V-shape in which bent part 55f is disposed downstream in a plan view. As a result, the contours of conductive film holes 56c and cathode holes 55e in a plan view are different (see <FIG> and <FIG>).

In this way, conductive film holes 56c, elongated in width direction Y, extend in a direction orthogonal to liquid flow direction X (width direction Y) in a plan view (see <FIG>). That is, an angle formed by an extending direction of conductive film holes 56c and liquid flow direction X in a plan view is <NUM> degrees.

Meanwhile, each cathode hole 55e has a shape in which two elongated holes extending from upstream and outside of width direction Y toward bent part 55f located downstream and at a center of width direction Y are communicated with each other by bent part 55f. That is, the two elongated holes extending from bent part 55f toward tip <NUM> upstream extend in a direction intersecting liquid flow direction X in a plan view (see <FIG>).

Each cathode hole 55e is formed such that tip <NUM> is located outside in the width direction upstream of bent part 55f. Therefore, the two elongated holes configuring each cathode hole 55e extend in the direction intersecting liquid flow direction X and intersecting width direction Y (the direction orthogonal to liquid flow direction X). That is, an absolute value of each acute angle formed between the extending directions of the two elongated holes configuring cathode holes 55e and liquid flow direction X is larger than <NUM> degrees and smaller than <NUM> degrees.

Thus, for example, each cathode hole 55e can be a V-shaped groove in which the extending direction of a first elongated hole is a direction inclined by <NUM> degrees with respect to liquid flow direction X, and the extending direction of a second elongated hole is a direction inclined by -<NUM> degrees with respect to liquid flow direction X.

The absolute value of the acute angle formed by the extending direction of the first elongated hole and the liquid flow direction X does not have to be set to the same value as the absolute value of the acute angle formed by the extending direction of the second elongated hole and liquid flow direction X. That is, the shape of cathode holes 55e in a plan view does not have to be line-symmetric with respect to a straight line passing through bent part 55f and extending in liquid flow direction X.

In the present exemplary embodiment, with cathode <NUM> stacked on conductive film <NUM>, the extending directions of the two elongated holes configuring each cathode hole 55e are non-parallel to the extending direction of conductive film holes 56c in a plan view.

Then, with cathode <NUM> stacked on conductive film <NUM>, conductive film holes 56c and cathode holes 55e are configured to partially communicate with each other. That is, parts of a plurality of the elongated holes extending in different directions communicate with each other.

With such a configuration, conductive film <NUM> and cathode <NUM> are stacked to have intersections <NUM> (see <FIG>) in which outer periphery (contour line in a plan view) 66d of each conductive film hole 56c and outer periphery (contour line in a plan view) <NUM> of each cathode hole 55e intersect each other in a plan view.

Further, the plurality of conductive film holes 56c is formed in conductive film <NUM> so as to be aligned in a row along liquid flow direction X. The plurality of cathode holes 55e is formed in cathode <NUM> so as to be aligned in a row along liquid flow direction X.

In two cathode holes 55e adjacent to each other in liquid flow direction X are disposed such that bent part 55f of cathode hole 55e disposed upstream is located downstream of tip <NUM> of cathode hole 55e disposed downstream. A plurality of conductive film holes 56c is disposed so as to intersect one cathode hole 55e with cathode <NUM> stacked on conductive film <NUM>.

Therefore, in a plan view with cathode <NUM> stacked on conductive film <NUM>, a plurality of communication regions R1 communicating with conductive film holes 56c and a plurality of exposed regions R2 exposing conductive film <NUM> are formed in one cathode hole 55e. That is, a plurality of intersections <NUM> is formed in one cathode hole 55e.

At this time, it is preferable that the shape of the plurality of conductive film holes 56c is identical, the shape of the plurality of cathode holes 55e is identical, and the pitch of conductive film holes 56c in liquid flow direction X and the pitch of cathode holes 55e in liquid flow direction X are identical.

Then, communication regions R1 and exposed regions R2 appear regularly along liquid flow direction X.

Further, in this example, cathode <NUM> has a larger width in width direction Y than conductive film <NUM>. Thus, the contact area (electrolytic area) between cathode <NUM> and conductive film <NUM> can be approximated to a value obtained by subtracting a total area of exposed regions R2 from the area of an upper surface of conductive film <NUM> (a top part of conductive film <NUM> where conductive film holes 56c are not formed).

Cathode <NUM> and conductive film <NUM> configured as described above can decrease a change amount of the contact area (electrolytic area) between cathode <NUM> and conductive film <NUM> even if conductive film <NUM> is displaced relative to cathode <NUM> during formation of stacked body <NUM>. That is, when the positions are displaced by an identical amount, the change amount of the electrolytic area can be smaller in the configuration shown in the present exemplary embodiment than in the configuration shown in the above known art.

For example, as shown in <FIG>, when conductive film <NUM> is displaced relative to cathode <NUM> in liquid flow direction X during the formation of stacked body <NUM>, an area of one exposed region R2 (and an area of one communication region R1) slightly changes near bent part 55f of each cathode hole 55e. However, the area of one exposed region R2 hardly changes in the other parts. Therefore, the change amount in the total area of exposed regions R2 in one cathode hole 55e is substantially identical to the change amount near bent part 55f.

Further, in this example, even if conductive film <NUM> is displaced relative to cathode <NUM> in liquid flow direction X, outer periphery 56a of conductive film <NUM> (contour line in plan view) is in contact with cathode <NUM> as long as an amount of the displacement is within a certain extent. Thus, the contact area between conductive film <NUM> and cathode <NUM> is prevented from changing by outer periphery (contour line in a plan view) 56a of conductive film <NUM> protruding from cathode <NUM>.

In such a configuration, the contact area between conductive film <NUM> and cathode <NUM> after the displacement in liquid flow direction X only slightly changes from the contact area between conductive film <NUM> and cathode <NUM> when conductive film <NUM> is stacked at a regular position.

Further, as shown in <FIG>, when conductive film <NUM> is displaced relative to cathode <NUM> in width direction Y during the formation of stacked body <NUM>, the area of one exposed region R2 (and the area of one communication region R1) basically remains almost unchanged. However, a length of conductive film holes 56c in width direction Y is slightly shorter in the part where conductive film recesses 56b are formed as relief parts. In this part, the area of one exposed region R2 slightly changes.

In this way, when the position is relatively displaced in width direction Y, the change amount of the total area of exposed regions R2 in one cathode hole 55e is substantially identical to the change amount at the part where conductive film recesses 56b as relief parts are formed.

As shown in <FIG>, even if conductive film <NUM> is displaced relative to cathode <NUM> in width direction Y, outer periphery 56a of conductive film <NUM> (contour line in plan view) is in contact with cathode <NUM> as long as an amount of the displacement is within a certain extent. Therefore, in such a configuration, the contact area between conductive film <NUM> and cathode <NUM> after the displacement in width direction Y only slightly changes from the contact area between conductive film <NUM> and cathode <NUM> when conductive film <NUM> is stacked at a regular position.

In such a configuration, even if conductive film <NUM> is displaced relative to cathode <NUM> in a horizontal direction (liquid flow direction X and width direction Y), the contact area between conductive film <NUM> and cathode <NUM> only slightly changes.

In contrast, as shown in the above known art, when grooves are formed by overlapping holes having the identical shape, exposed regions R2 which are not formed in a regular state are formed in each groove by conductive film <NUM> displaced with respect to cathode <NUM>.

Thus, the total area of exposed regions R2 formed in each groove is the change amount of the contact area between conductive film <NUM> and cathode <NUM>. When conductive film <NUM> is displaced by the identical amount with respect to the cathode <NUM>, exposed regions R2 newly formed in each groove have a larger value than the change amount of the contact area between conductive film <NUM> and cathode <NUM> in the configuration shown in the present exemplary embodiment.

For example, when conductive film <NUM> is displaced with respect to cathode <NUM> by the identical amount in liquid flow direction X, exposed regions R2 only change near bent part 55f in the configuration shown in the present exemplary embodiment. However, in the configuration shown by the known art, exposed regions R2 protruding by the amount of displacement in liquid flow direction X are formed substantially entirely in width direction Y of grooves <NUM>. In this way, when conductive film <NUM> is displaced by the identical amount with respect to cathode <NUM>, the change amount of the contact area between conductive film <NUM> and cathode <NUM> is smaller in the configuration shown in the present exemplary embodiment than in the configuration shown by the known art.

Furthermore, in the present exemplary embodiment, arcuate curved parts 56e in a plan view are formed at both ends of each conductive film hole 56c in width direction Y. This prevents a formation of an edge on outer periphery (contour line in a plan view) 66d of each conductive film hole 56c.

Further, arcuate curved parts in a plan view are formed at bent part 55f and tip <NUM> of each cathode hole 55e. This prevents a formation of an edge on outer periphery (contour line in a plan view) <NUM> of cathode hole 55e.

As described above, outer periphery (contour line in a plan view) 66d of each conductive film hole 56c and outer periphery (contour line in the plan view) <NUM> of each cathode hole 55e, which are smooth, can alleviate a local concentration of an electric field during the electrolysis. As a result, ozone <NUM> (see <FIG>) can be generated more uniformly over the entire part of interface <NUM> exposed to grooves <NUM>, and the generation efficiency of ozone <NUM> can be more stabilized.

In the present exemplary embodiment, grooves <NUM> include conductive film holes (conductive film grooves) 56c formed in conductive film <NUM> and cathode holes (electrode grooves) 55e formed in cathode (electrode) <NUM> and communicating with conductive film holes 56c.

Then, the shape of conductive film holes 56c and the shape of cathode holes 55e are different when viewed along stacking direction Z of stacked body <NUM>.

Then, even if conductive film <NUM> is displaced relative to cathode (electrode) <NUM> in the direction intersecting stacking direction Z, the contact area between conductive film <NUM> and cathode (electrode) <NUM> can be prevented from changing. That is, the electrolytic area (energized area) between conductive film <NUM> and cathode (electrode) <NUM> can be secured more stably.

In this way, stably securing the electrolytic area (energized area) between conductive film <NUM> and cathode (electrode) <NUM> can make the current density of the current flowing through electrolytic part <NUM> more uniform. That is, it is possible to suppress a change in the current density of the current flowing through electrolytic part <NUM> for each individual product. As a result, the generation efficiency of ozone (electrolytic product) <NUM> can be further stabilized.

As described above, in the present exemplary embodiment, the generation efficiency of ozone (electrolytic product) <NUM> can be further stabilized even when conductive film <NUM> and cathode (electrode) <NUM> are displaced. That is, ozone water generator <NUM> can be obtained in which the generation efficiency of ozone (electrolytic product) <NUM> is substantially constant.

Further, in the present exemplary embodiment, conductive film <NUM> and cathode <NUM> are stacked so as to have intersection <NUM> in which outer periphery 66d of conductive film holes 56c and outer periphery <NUM> of cathode holes 55e intersect each other as viewed along stacking direction Z of stacked body <NUM>.

Then, when conductive film <NUM> and cathode (electrode) <NUM> are displaced, the change in the contact area between conductive film <NUM> and cathode (electrode) <NUM> can be more reliably suppressed.

Further, in the present exemplary embodiment, conductive film holes 56c extend in a direction intersecting liquid flow direction (liquid direction in which liquid flows) X.

This allows ozone <NUM> generated near interface <NUM> between conductive film <NUM> and anode <NUM> to be quickly peeled off from interface <NUM>. That is, the bubbles of ozone <NUM> generated near interface <NUM> are prevented from becoming larger.

The bubbles of ozone <NUM> having grown larger may be left undissolved by the water (liquid) and float in the water (liquid) even if peeled off from interface <NUM>, thereby reducing a dissolved concentration of ozone (electrolytic product) <NUM> in the water (liquid).

However, conductive film holes 56c formed so as to extend in the direction intersecting liquid flow direction X as in the present exemplary embodiment allow the bubbles of ozone <NUM> to be quickly peeled off from interface <NUM> before growing larger. As a result, dissolution of ozone (electrolytic product) <NUM> in water (liquid) can be further improved.

Further, in the present exemplary embodiment, conductive film holes 56c extend in the direction orthogonal to liquid flow direction X.

Then, ozone <NUM> generated near interface <NUM> between conductive film <NUM> and anode <NUM> can be more quickly peeled off from interface <NUM>.

Further, in the present exemplary embodiment, the electrodes adjacent to each other are cathode <NUM> and anode <NUM>. The electrode grooves have cathode holes (cathode grooves) 55e formed in cathode <NUM>, and cathode holes 55e extend in the direction intersecting liquid flow direction X.

This can prevent ozone (electrolytic product) <NUM> from staying in grooves <NUM>, and can cause ozone <NUM> to flow into channel <NUM> more efficiently.

Further, in the present exemplary embodiment, each cathode hole 55e has a V-shape in which bent part 55f is disposed downstream as viewed along stacking direction Z of stacked body <NUM>.

Thus, generated ozone (electrolytic product) <NUM> moves along the inclination of cathode holes 55e to a center where the flow speed is relatively large, and ozone (electrolytic product) <NUM> can be further prevented from staying. As a result, an ozone concentration (electrolytic product concentration) can be further increased.

Further, it is preferable that the shape of the plurality of conductive film holes 56c is identical, the shape of the plurality of cathode holes 55e is identical, and the pitch of conductive film holes 56c in liquid flow direction X and the pitch of cathode holes 55e in liquid flow direction X are identical.

By doing so, communication regions R1 and exposed regions R2 appear regularly along liquid flow direction X, thereby reducing an influence of the displacement.

Further, arcuate curved parts 56e in a plan view are preferably formed at both ends of each conductive film hole 56c in width direction Y.

Further, the arcuate curved parts in a plan view are preferably formed in bent part 55f and the tip of each cathode hole 55e.

This can alleviate a local concentration of an electric field during the electrolysis, and can generate ozone <NUM> more uniformly over the entire part of interface <NUM> exposed to grooves <NUM>. As a result, the generation efficiency of ozone <NUM> can be further stabilized.

Further, cathode holes 55e may be formed in an elongated shape extending along liquid flow direction X such that cathode holes 55e and conductive film holes 56c intersect in a cross shape in a plan view during stacking.

Further, the extending direction of conductive film holes 56c may be the direction intersecting liquid flow direction X and width direction Y (the direction orthogonal to liquid flow direction X). At this time, the extending direction of conductive film holes 56c and the extending direction of cathode holes 55e are preferably non-parallel, and conductive film holes 56c and cathode holes 55e preferably intersect during stacking.

Further, conductive film holes 56c and cathode holes 55e may have similar shapes, and entire small holes may be in large holes during the stacking.

Further, conductive film holes 56c may be V-shaped, and cathode holes 55e may be elongated.

The electrode case, the electrode case lid, and other detailed specifications (shape, size, layout, and the like) can be changed as appropriate.

As described above, the present disclosure can take the following aspects.

An electrolyzed liquid generator of the present disclosure has a stacked body in which a conductive film is stacked to be interposed between a plurality of electrodes adjacent to each other, and a housing in which an electrolytic part is disposed, the electrolytic part being configured to electrolyze a liquid.

Then, the electrolytic part includes a groove opening to the channel and having an interface between the conductive film and the plurality of the electrodes, the interface being at least partially exposed.

The groove includes a conductive film groove disposed on the conductive film and an electrode groove disposed on the plurality of electrodes and communicating with the conductive film groove.

The shape of the conductive film groove and the shape of the electrode groove are different when viewed along the stacking direction of the stacked body.

Further, the conductive film and the plurality of electrodes may be stacked so as to have an intersection in which an outer periphery of the conductive film groove and an outer periphery of the electrode groove intersect each other when viewed along the stacking direction of the stacked body.

Further, the conductive film groove may extend in the direction intersecting the liquid flow direction.

Further, the conductive film groove may extend in a direction orthogonal to the liquid flow direction.

Further, the plurality of electrodes adjacent to each other is a cathode and an anode, the electrode groove has a cathode groove formed on the cathode, and the cathode groove may extend in a direction intersecting the liquid flow direction.

The cathode groove may have a V-shape in which a bent part is disposed downstream when viewed along the stacking direction of the stacked body.

For example, in the above exemplary embodiment, the ozone water generator that generates ozone by generating ozone and dissolving the ozone in water has been exemplified. However, a substance to be generated is not limited to ozone. For example, hypochlorous acid may be produced and used for sterilization, water treatment, and the like. Further, it is also possible to use an apparatus generating oxygen water, hydrogen water, chlorine-containing water, hydrogen peroxide solution, or the like.

Note that these electrolyzed liquid generators can also be used while incorporated in other equipment and facilities. When incorporated into other equipment and facilities, the electrolyzed liquid generator is preferably arranged upright such that the inlet port is at the bottom and the outlet port is at the top as in ozone water generator <NUM>. However, the arrangement is not limited to this, and an appropriate arrangement is possible.

Anode <NUM> can also include a material selected from, for example, conductive silicon, conductive diamond, titanium, platinum, lead oxide, tantalum oxide, and the like. Any material may be used as long as an electrode having conductivity and durability capable of producing electrolyzed water can be configured. Further, when anode <NUM> is a diamond electrode, a manufacturing method of anode <NUM> is not limited to a manufacturing method by film formation. It is also possible to configure a substrate using a material other than metal.

Conductive film holes 56c may be V-shaped, and cathode holes 55e may be elongated.

Claim 1:
An electrolyzed liquid generator (<NUM>), comprising:
an electrolytic part (<NUM>) having a stacked body (<NUM>) in which a conductive film (<NUM>) is stacked to be interposed between a cathode (<NUM>) and an anode (<NUM>), the electrolytic part (<NUM>) being configured to electrolyze a liquid; and
a housing (<NUM>) in which the electrolytic part (<NUM>) is disposed, wherein
the housing (<NUM>) includes a channel (<NUM>) having an inlet port (<NUM>) into which a liquid supplied to the electrolytic part (<NUM>) flows and an outlet port (<NUM>) from which an electrolyzed liquid generated in the electrolytic part (<NUM>) flows out, and having a liquid flow direction (X) in a direction intersecting a stacking direction (Z) of the stacked body (<NUM>),
the electrolytic part (<NUM>) includes a groove (<NUM>) opening to the channel (<NUM>) and having an interface (<NUM>) between the conductive film (<NUM>) and the cathode (<NUM>) and an interface (<NUM>) between the conductive film (<NUM>) and the anode (<NUM>), the interfaces (<NUM>, <NUM>) at least partially being exposed,
characterized in that
the electrolyzed liquid generator (<NUM>) has a space (S) between at least one of an outer periphery (55c) of the cathode (<NUM>) and an outer periphery (54a) of the anode (<NUM>), and an inner surface (22a) of the housing (<NUM>) when viewed along the liquid flow direction (X), wherein the outer periphery (55c) of the cathode (<NUM>) is a side surface of the cathode (<NUM>) and the outer periphery (54a) of the anode (<NUM>) is a side surface of the anode (<NUM>).