JP2018167142A - Electric discharge apparatus - Google Patents

Abstract

To propose an electric discharge apparatus from which an electric discharge plate can be easily removed and which can prevent water leakage between a first chamber and a second chamber.SOLUTION: An electric discharge apparatus (10) comprises: two water tanks (21, 31) which, respectively, have chambers (22, 32) for reserving water electrically-conductive with respective electrodes (91, 94) and have side walls (26, 36) with communication holes (28, 38) formed therein in communication with the chambers (22, 32); and an electric discharge plate (50) having a pore (52) for generating an electric discharge. The two water tanks (21, 31) can be connected with each other so as to sandwich the electric discharge plate (50) so that the two communication holes (28, 38) of the two side walls (26, 36) are in communication with the pore (52).SELECTED DRAWING: Figure 5

Description

    The present invention relates to a discharge device.

    Conventionally, there is a discharge device that discharges between electrodes in water. Patent Document 1 discloses this type of discharge device.

    The discharge device of Patent Document 1 includes one water tank and a partition plate that divides the inside of the water tank into a first chamber and a second chamber. A first electrode is provided in the water in the first chamber, and a second electrode is provided in the water in the second chamber. The partition plate of Patent Document 1 holds a discharge plate having fine holes (discharge holes). The first chamber and the second chamber communicate with each other through this hole.

    When a potential difference is applied from the power source to the pair of electrodes, the current density in the discharge holes increases and water is vaporized by Joule heat. Thereby, bubbles are generated inside the discharge holes, and the water in the two storage chambers is divided by the bubbles. When a potential difference is continuously applied to the pair of electrodes in this state, the interface on the first chamber side and the interface on the second chamber side sandwiching the bubbles become pseudo electrodes, and a discharge occurs between the interfaces. Done. Accompanying this discharge, active species such as hydroxyl radicals are generated in water.

Japanese Patent Laid-Open No. 2006-123917

    In patent document 1, a partition plate is attached to the inside of a water tank so that attachment or detachment is possible. Further, the partition plate is configured to be splittable in the thickness direction, and the partition plate is held between the two split bodies. With this structure, only the discharge plate can be detached independently by removing the partition plate from the water tank and dividing the partition plate. Therefore, maintenance and replacement of the discharge plate can be performed easily.

    However, when the partition plate is configured to be detachable with respect to the water tank, the outer peripheral edge portions (left and right side edge portions and lower edge portions) of the partition plate are interposed in the two chambers. And the distance of the clearance gap around a partition plate is comparatively short. For this reason, when the seal | sticker of the clearance gap between a water tank and a partition plate becomes inadequate, there existed a problem which water leakage and by extension electric current leaked between the 1st chamber and the 2nd chamber, and desired discharge could not be continued.

    The present invention has been made paying attention to such a problem, and the purpose of the discharge is to enable the discharge plate to be easily removed and to prevent water leakage between the first chamber and the second chamber. It is to propose a device.

The first invention comprises a power source (90), two electrodes (91, 94) connected to the power source (90),
Side walls (26, 36) in which chambers (22, 32) for storing water conducting to each electrode (91, 94) and communication holes (28, 38) communicating with the chambers (22, 32) are formed. Each having two water tanks (21, 31) and a discharge plate (50) having a hole (52) for generating a discharge, and the two water tanks (21, 31) have two side walls ( 26, 36) are connected to each other in a state where the discharge plate (50) is sandwiched so that the two communication holes (28, 38) communicate with the hole (52). It is.

    Here, the discharge plate (50) may be directly sandwiched between the two side walls (26, 36) so as to be in contact with the two side walls (26, 36). 36) may be indirectly sandwiched via another member.

    In the first invention, the discharge plates (50) are connected to each other with the discharge plates (50) sandwiched between the side walls (26, 36) of the two water tanks (21, 31). In this state, each chamber (22, 32) of each water tank (21, 31) communicates with the hole (52) via each communication hole (28, 38). When a voltage is applied to each electrode from the power supply (90), a current flows from one chamber (22, 32) to the other chamber (22, 32), and the current density in the hole (52) increases. As a result, bubbles are generated inside the hole (52), and as a result, discharge is performed inside the hole (52).

    In the present invention, the discharge plate (50) is sandwiched and held between the two water tanks (21, 31). That is, the side walls (26, 36) of each water tank (21, 31) also serve as a holding member for sandwiching the discharge plate (50). In this structure, unlike the conventional example described above, the periphery of the partition plate does not face the two chambers, and water does not leak around the partition plate. In the present invention, the discharge plate (50) can be removed from the discharge device (10) by releasing the connection between the water tanks (21, 31) and separating them.

    In a second aspect based on the first aspect, the discharge plate (50) includes a disc-shaped discharge plate main body (51) in which the hole (52) is formed, and the discharge plate main body (51) inside. A disc-shaped elastic member (60) having a through hole (61) for holding and exposing the hole (52) of the discharge plate main body (51) to the outside, the two water tanks (21, 31), The discharge device is characterized in that the two side walls (26, 36) are configured to be connected to each other with the elastic member (60) sandwiched therebetween.

    Here, the elastic member (60) may be directly sandwiched between the side walls (26, 36) so as to be in contact with the two side walls (26, 36), or the two side walls (26, 36). It may be sandwiched indirectly via other members.

    In the discharge plate (50) of the second invention, the discharge plate body (51) in which the hole (52) is formed is covered with a disk-shaped elastic member (60), and the elastic member (60) has two side walls. (26,36). For this reason, even if the discharge plate (50) is vibrated due to discharge or the like, the stress concentration acting on the discharge plate (50) can be relaxed by the elastic member (60). As a result, it is possible to prevent the discharge plate (50) from being cracked due to vibration.

    Further, the periphery of the discharge plate (50) can be sealed by bringing the elastic member (60) into close contact with the side walls (26, 36) and the outer surfaces of other members. That is, water that has passed through the communication hole (28, 38) from one chamber (22, 32) may wrap around the discharge plate (50) and leak into the other chamber (22, 32). There is. However, such a water leak can be avoided by bringing the elastic member (60) into close contact with the side walls (26, 36) and other members.

    According to a third aspect, in the second aspect, at least one of the side end faces (60a, 60b) on both sides in the axial direction of the elastic member (60) has an annular projection surrounding the through hole (61). The discharge unit is characterized in that (65, 66, 67, 68) is formed.

    In the third invention, the annular protrusions (65, 66, 67, 68) of the elastic member (60) are brought into contact with the side walls (26, 36) of the water tank (21, 31) or other members to form an annular shape. The seal portion is formed. As a result, the water that has passed through the communication hole (28, 38) from one chamber (22, 32) goes around the discharge plate (50) and leaks into the other chamber (22, 32). This can be prevented by the annular protrusions (65, 66, 67, 68).

    In a fourth aspect based on the third aspect, the first annular protrusion (65, 66, 67, 68) and the first annular protrusion (65, 66, 67, 68) are formed on the side end surfaces (60a, 60b) of the elastic member (60). And a second annular projection (65, 66, 67, 68) surrounding the annular projection (65, 66, 67, 68).

    In the fourth invention, the two annular protrusions (65, 66, 67, 68) of the elastic member (60) are in contact with the side walls (26, 36) of the water tank (21, 31) or other members, respectively. Thus, two annular seal portions are formed. Thereby, the water in one chamber (22, 32) can be prevented from leaking into the other chamber (22, 32) by the two seal portions.

    In the state where air exists between the two annular protrusions (65, 66, 67, 68), the water around the annular protrusion (65, 66, 67, 68) , 67, 68) can be prevented by this air. Thereby, it can prevent more reliably that the water of one chamber (22, 32) leaks to the other chamber (22, 32).

    According to a fifth invention, in any one of the second to fourth inventions, the elastic member (60) is provided on at least one of the side walls (36) of the two water tanks (21, 31). The discharge device is characterized in that a recess (41) to be internally fitted is formed.

    In the fifth invention, the elastic plate (60) is fitted into the recess (41) formed in the side wall (36) of the water tank (31), so that the discharge plate (50) is attached to the two side walls (26, 36). It can be securely held in between.

    In a sixth aspect based on the fifth aspect, the side wall (36) in which the concave portion (41) is formed is constituted by a separate member separable from the main body (31a) of the corresponding water tank (31). It is the discharge device characterized by this.

    In 6th invention, it can isolate | separate from the side wall (36) in which the said recessed part (41) is formed, and the main-body part (31a) of a water tank (31). Here, since the communication hole (38) and the recess (41) are formed in the side wall (36), when the side wall (36) is integrated with the water tank (31), the processing of the side wall (36) is performed. It becomes difficult. Specifically, for example, it is difficult to integrally form the communication hole (38) and the recess (41) of the side wall (36) together with the wall and bottom of the water tank (31) with a mold or the like. In contrast, in the present invention, since the side wall (36) and the main body (31a) of the water tank (31) can be manufactured separately, the communication hole (38) and the recess (41) of the side wall (36) are also easily formed. it can.

    According to a seventh invention, in any one of the second to fourth inventions, a resin case (70) having a shape along an outer shape of the elastic member (60) is provided, and a side wall of each of the water tanks (21, 31). (26, 36) is formed integrally with the main body (21a, 31a) of the corresponding water tank (21, 31), and the resin case (70) is sandwiched between the two side walls (26, 36). It is the discharge device characterized by this.

    In the seventh invention, the resin case (70) covering the elastic member (60) is between the two side walls (26, 36) integrated with the main body (21a, 31a) of each water tank (21, 31). Sandwiched between. By covering the elastic member (60) with the resin case (70), the discharge plate (50) and the resin case (70) can be configured as an integral unit, and the outer shape of the unit can be simplified. For this reason, the shape of the side walls (26, 36) sandwiching the resin case (70) is not complicated. As a result, the resin case (70) can be held between the side walls (26, 36) while being integrally formed with the water tanks (21, 31).

    According to the present invention, since the discharge plate (50) is sandwiched between the side walls (26, 36) of the two water tanks (21, 31), water leakage occurs around the partition portion as in the conventional example. There is no. As a result, water leakage or current leakage between the chambers (22, 32) can be prevented, and stable discharge can be performed. Further, according to the present invention, the discharge plate (50) can be easily removed by releasing the connection between the two water tanks (21, 31). Therefore, replacement and maintenance of the discharge plate (50) can be easily performed.

FIG. 1 is a perspective view illustrating an overall configuration of a main part of a discharge device according to an embodiment. FIG. 2 is a top view of a main part of the discharge device according to the embodiment. FIG. 3 is a longitudinal sectional view of a main part of the discharge device according to the embodiment. FIG. 4 is an assembled perspective view of a main part of the discharge device according to the embodiment. FIG. 5 is a transverse cross-sectional view showing an assembled state of the discharge plate of the discharge device according to the embodiment. FIG. 6 is a perspective view in which a part of the discharge plate is broken. FIG. 7 is a diagram schematically showing the state of generation of bubbles in the holes of the discharge plate. FIG. 8 is a transverse cross-sectional view showing an assembled state of the discharge plate of the discharge device according to the first modification. FIG. 9 is an assembled perspective view of the main part of the discharge device according to the second modification. FIG. 10 is a transverse cross-sectional view illustrating an assembled state of the discharge plate of the discharge device according to the second modification.

    Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its application, or its use.

    The discharge device according to the present invention is applied to, for example, a purified water generation device (10). The purified water generating device (10) generates purified water containing a purified component and a sterilizing factor along with the discharge. The produced purified water is used for cleaning and sterilizing an object (for example, dentures). The purified water generator (10) includes a tank unit (20), a power source (90), a first electrode (91), and a second electrode (94).

<Overall configuration of tank unit>
As shown in FIGS. 1 to 4, the tank unit (20) includes a first water tank (21), a second water tank (31), a discharge plate (50), and a plurality of connecting members (bolts (15)). ing. The first water tank (21) and the second water tank (31) constitute a container whose upper side is opened. The first water tank (21) and the second water tank (31) are made of an insulating resin material, for example. In the present embodiment, the first water tank (21) is disposed on the left side, and the second water tank (31) is disposed on the right side. A 1st water tank (21) and a 2nd water tank (31) are connected with a some volt | bolt (15) in the state adjacent to right and left.

    A first chamber (22) for storing water is formed in the first water tank (21), and a second chamber (32) for storing water is formed in the second water tank (31). In this embodiment, the height of the first water tank (21) and the second water tank (31) is equal, and the volume of the first chamber (22) is larger than the volume of the second chamber (32). Specifically, the front and rear lengths of the first chamber (22) are larger than the front and rear lengths of the second chamber (32), and the left and right widths of the first chamber (22) are the second chamber (32). It is larger than the left and right widths.

    The first water tank (21) includes a first bottom wall portion (23), a first peripheral wall portion (24) erected so as to surround the first bottom wall portion (23), and a first peripheral wall portion (24). And a first flange (25) continuous to the upper end. The first bottom wall (23) is formed in a substantially rectangular plate shape. A 1st surrounding wall part (24) is formed in a substantially rectangular cylinder shape. The first flange portion (25) is formed in a substantially rectangular frame shape that extends radially outward from the upper end of the first peripheral wall portion (24).

    Of the first peripheral wall portion (24), the side wall facing the second water tank (31) constitutes the first side wall (26). Both end portions in the front-rear direction of the first side wall (26) are thicker than their intermediate portions. Fastening holes (27) to which the bolts (15) are fastened are formed in these thick portions (see FIG. 2). Each fastening hole (27) is formed to be recessed horizontally from the second water tank (31) side toward the left side. A thread groove into which the bolt (15) is screwed is formed on the inner peripheral surface of each fastening hole (27). A first communication hole (28) communicating with the first chamber (22) is formed in the central portion of the first side wall (26).

    The second water tank (31) includes a second bottom wall portion (33), a second peripheral wall portion (34) standing so as to surround the second bottom wall portion (33), and a second peripheral wall portion (34). A second flange (35) continuous to the upper end. The second bottom wall (33) is formed in a substantially rectangular plate shape. The second peripheral wall portion (34) is formed in a substantially rectangular cylindrical shape. The second flange portion (35) is formed in a substantially rectangular frame shape that extends radially outward from the upper end of the second peripheral wall portion (34).

    Insertion holes (37) for inserting bolts (15) are formed in the front side portion and the rear side portion of the second peripheral wall portion (34), respectively. Each insertion hole (37) is formed to be recessed horizontally from the right wall portion of the second water tank (31) toward the first water tank (21) side, and with the fastening hole (27) of the first water tank (21). Communicate.

    Of the second peripheral wall portion (34), the side wall facing the first water tank (21) constitutes the second side wall (36). A second communication hole (38) communicating with the second chamber (32) is formed in the central portion of the second side wall (36).

    The discharge plate (50) is sandwiched between the first side wall (26) of the first water tank (21) and the second side wall (36) of the second water tank (31). Details of the discharge plate (50) will be described later.

<Power supply>
The power source (90) schematically shown in FIG. 3 applies a potential difference to the first electrode (91) and the second electrode (94). The power supply (90) of this embodiment applies a high voltage of an alternating waveform (square wave) in which positive and negative are switched with respect to the first electrode (91) and the second electrode (94). It is preferable that the duty ratio of the alternating waveform has the same ratio between the positive electrode side and the negative electrode side. The voltage applied from the power source (90) to the first electrode (91) and the second electrode (94) is not limited to a square wave, and may be, for example, a sine wave.

<First electrode>
As shown in FIGS. 1-3, the 1st electrode (91) is provided in the side wall vicinity of the left side of a 1st water tank (21). The first electrode (91) of the present embodiment is configured by folding a thin metal plate. An intermediate portion between one end (upper end) and the other end (lower end) of the first electrode (91) is embedded in the first water tank (21). One end of the first electrode (91) is exposed to the upper side from the left side edge of the first flange (25). The exposed portion on one end side of the first electrode (91) constitutes a first energization section (92) that energizes the power source (90). The other end of the first electrode (91) is exposed from the inner wall side of the first peripheral wall portion (24) to the inside of the first chamber (22). The exposed part on the other end side of the first electrode (91) constitutes a first electrode part (93) immersed in the water of the first chamber (22). The 1st electrode part (93) of this embodiment exists in a position higher than the 1st communicating hole (28).

<Second electrode>
As shown in FIGS. 1 to 3, the second electrode (94) is provided near the right side wall of the second water tank (31). The second electrode (94) of the present embodiment is configured by folding a thin metal plate. An intermediate portion between one end (upper end) and the other end (lower end) of the second electrode (94) is embedded in the second water tank (31). One end of the second electrode (94) is exposed to the upper side from the right edge of the second collar portion (35). The exposed part on the one end side of the second electrode (94) constitutes a second energization section (95) that energizes the power source (90). The other end of the second electrode (94) is exposed to the inside of the second chamber (32) from the inner wall side of the second peripheral wall portion (34). The exposed part on the other end side of the second electrode (94) constitutes a second electrode part (96) immersed in the water of the second chamber (32). The 2nd electrode part (96) of this embodiment exists in a position higher than the 2nd communicating hole (38), and exists in the same height position as the 1st electrode part (93).

<Detailed structure of discharge plate>
The discharge plate (50) shown in FIGS. 3 to 6 is held between the first side wall (26) and the second side wall (36). The discharge plate (50) includes a disc-shaped discharge plate body (51) and an elastic member (60) that covers the outer peripheral edge of the discharge plate body (51). The discharge plate body (51) is made of an insulating material (for example, a ceramic material). The elastic member (60) is made of an insulating resin material (for example, a silicon material) having elasticity.

    The discharge plate body (51) is formed in a circular thin plate shape, and a fine circular hole (52) is formed in the axial center portion thereof. The thickness of the discharge plate body (51) is, for example, 0.5 mm, and the inner diameter of the hole (52) is, for example, 50 μm.

    The elastic member (60) is formed in a disc shape in which a through hole (61) is provided in the axial center portion thereof. The elastic member (60) covers a portion of the discharge plate body (51) on the outer peripheral side of the hole (52). Specifically, a disk-shaped fitting groove (62) that extends radially outward from the through hole (61) is formed inside the elastic member (60). The outer peripheral edge of the elastic member (60) is fitted in the fitting groove (62).

    In the discharge plate (50), the elastic member (60) and the discharge plate body (51) are coaxial, and the through hole (61) and the hole (52) overlap each other in the axial direction. Therefore, the open ends on both sides of the hole (52) are exposed to the outside through the open ends of the through hole (61).

    As shown in FIG.5 and FIG.6, the 1st taper part (63) and the 2nd taper part (64) are formed in the through-hole (61) of an elastic member (60). The first taper portion (63) is formed on the first side wall (26) side. The second taper portion (64) is formed on the second side wall (36) side. The first taper part (63) reduces the inner diameter of the through hole (61) as it approaches the discharge plate body (51) (right side). The second taper portion (64) reduces the inner diameter of the through hole (61) as it approaches the discharge plate body (51) (left side).

    Two inner protrusions (65, 67), two intermediate protrusions (66, 68), and one outer protrusion (69) are formed on the surface of the elastic member (60). These protrusions (65, 66, 67, 68, 69) are each formed in an annular shape surrounding the through hole (61).

    Specifically, a first inner protrusion (65) and a first intermediate protrusion (66) are formed on one (left side) first side end surface (60a) in the thickness direction of the elastic member (60). A second inner protrusion (67) and a second intermediate protrusion (68) are formed on the second (right) second side end face (60b) in the thickness direction of the elastic member (60). The first inner protrusion (65) and the second inner protrusion (67) constitute an annular first protrusion surrounding the through hole (61). The first intermediate protrusion (66) and the second intermediate protrusion (68) constitute an annular second protrusion that surrounds the first protrusion.

    The first inner protrusion (65) and the second inner protrusion (67) are formed in an annular shape along the inner edge of the through hole (61). The first inner protrusion (65) projects horizontally from the first side end face (60a) toward the first side wall (26). The second inner protrusion (67) protrudes horizontally from the second side end face (60b) toward the second side wall (36).

    The first intermediate protrusion (66) and the second intermediate protrusion (68) are formed at an intermediate portion between the outer edge and the inner edge of the elastic member (60). The first intermediate protrusion (66) is formed in an annular shape that is coaxial and parallel to the first inner protrusion (65). The second intermediate protrusion (68) is formed in an annular shape that is coaxial and parallel to the second inner protrusion (67). The first intermediate protrusion (66) protrudes horizontally from the first side end face (60a) toward the first side wall (26). The second intermediate protrusion (68) protrudes horizontally from the second side end face (60b) toward the second side wall (36).

<First side wall>
As shown in FIG. 5, the 1st side wall (26) of this embodiment is formed integrally with the 1st main-body part (21a) of a 1st water tank (21). Here, the 1st main-body part (21a) of this embodiment is a member except a 1st side wall (26) among 1st water tanks (21).

    The first communication hole (28) described above is formed in the first side wall (26). The first communication hole (28) includes, in order from the first chamber (22) toward the discharge plate main body (51), a first enlarged diameter portion (28a) and a first straight portion (28b). The first enlarged-diameter portion (28a) is formed in a substantially trapezoidal conical shape that increases the inner diameter as it approaches the first chamber (22). The first straight part (28b) is continuous with the end on the back side of the first enlarged diameter part (28a). The first straight portion (28b) forms a cylindrical inner peripheral surface having the same inner diameter across both ends in the axial direction.

    A first annular protrusion (29) is formed on the outer surface of the first side wall (26) so as to protrude toward the right side (second side wall (36)). The first annular protrusion (29) is formed in a substantially cylindrical shape along the inner edge of the first communication hole (28). A first inclined surface (29a) that is inclined with respect to the axial center of the first communication hole (28) is formed on the outer peripheral side of the first annular protrusion (29). The first inclined surface (29a) has a shape along the first tapered portion (63) of the elastic member (60).

<Second side wall>
As shown in FIG. 5, the 2nd side wall (36) of this embodiment is formed integrally with the 2nd main-body part (31a) of a 2nd water tank (31). Here, the 2nd main-body part (31a) of this embodiment is a member except a 2nd side wall (36) among 2nd water tanks (31).

    The second communication hole (38) described above is formed in the second side wall (36). The second communication hole (38) includes, in order from the second chamber (32) toward the discharge plate main body (51), a second enlarged diameter portion (38a) and a second linear portion (38b). The second expanded diameter portion (38a) is formed in a substantially trapezoidal cone shape that expands the inner diameter as it approaches the second chamber (32). The second straight portion (38b) is continuous with the end on the back side of the second enlarged diameter portion (38a). The second straight portion (38b) forms a cylindrical inner peripheral surface having the same inner diameter across both ends in the axial direction.

    An annular recess (41) in which the elastic member (60) of the discharge plate (50) is fitted is formed on the outer surface of the second side wall (36). The annular recess (41) forms a substantially cylindrical space surrounding the second communication hole (38). A second annular convex portion (39) is formed on the bottom surface of the annular concave portion (41) so as to protrude toward the left side (first side wall (26)). The second annular protrusion (39) is formed in a substantially cylindrical shape along the inner edge of the second communication hole (38). A second inclined surface (39a) that is inclined with respect to the axial center of the second communication hole (38) is formed on the outer peripheral side of the second annular convex portion (39). The second inclined surface (39a) has a shape along the second tapered portion (64) of the elastic member (60).

    A ring groove (42) is formed on the outer surface of the second side wall (36). The ring groove (42) is formed in an annular shape formed around the annular recess (41). An annular O-ring (16) is fitted inside the ring groove (42).

<Discharge plate assembly work>
As shown in FIG. 4, in the assembly work, a first water tank (21), a second water tank (31), a discharge plate (50), and an O-ring (16) are prepared. The discharge plate (50) is in a state where an elastic member (60) is mounted around the discharge plate body (51). Next, the O-ring (16) is fitted into the ring groove (42) of the second water tank (31), and the discharge plate (50) is fitted into the annular recess (41) of the second water tank (31). At this time, the second taper part (64) of the elastic member (60) is externally fitted to the second annular convex part (39) of the second water tank (31).

    Then, the 1st side wall (26) of a 1st water tank (21) and the 2nd side wall (36) of a 2nd water tank (31) are made to contact. At this time, the first tapered portion (63) of the elastic member (60) is externally fitted to the first annular convex portion (29) of the first water tank (21).

    In this state, a plurality of bolts (15) are inserted into the insertion holes (37) of the second water tank (31), and these bolts (15) are inserted into the fastening holes (27) of the first water tank (21). To be fastened. Thereby, a 1st water tank (21) and a 2nd water tank (31) are connected with a volt | bolt (15). As a result, the discharge plate (50) is sandwiched and held between the first side wall (26) and the second side wall (36).

    In the state where the discharge plate (50) is assembled in the tank unit (20) as described above, the first communication hole (28) of the first water tank (21) and the hole (52 of the discharge plate (50)) ) And the second communication hole (38) of the second water tank (31) are coaxial with each other so that they communicate with each other.

<Discharge plate removal work>
On the other hand, when removing the discharge plate (50) from the tank unit (20), an operation opposite to the above-described assembly operation is performed. That is, the fastening of each bolt (15) is released, and the first water tank (21) and the second water tank (31) are separated from each other. Thereby, a discharge plate (50) can be removed easily and a discharge plate (50) can be maintained and replaced.

<Driving operation>
During operation of the purified water generator (10), water is stored in the first chamber (22) of the first water tank (21) and the second chamber (32) of the second water tank (31). Accordingly, the first electrode part (93) is immersed in the water of the first chamber (22), and the second electrode part (96) is immersed in the water of the second chamber (32). In this state, a square wave voltage is applied from the power source (90) to both electrodes (91, 94). Then, an electric current flows from one chamber (22, 32) to the other chamber (22, 32) through the hole (52).

    Since the hole diameter of the hole (52) is extremely small, the current density of the current path in the hole (52) increases. Then, Joule heat generated inside the hole (52) is increased, and water in the hole (52) is vaporized to form bubbles (B) (see FIG. 7). The bubbles (B) are formed across both ends of the hole (52) in the axial direction.

    In this state, the first chamber (22) and the second chamber (32) are electrically separated by the bubbles (B). That is, the bubble (B) functions as an insulation resistor that blocks conduction between the water in the first chamber (22) and the water in the second chamber (32). As a result, at the gas-liquid interface of the bubbles (B), the interface corresponding to the first chamber (22) and the interface corresponding to the second chamber (32) are respectively pseudo electrodes, and the potential difference between these electrodes is Increase. As a result, in the bubble (B), dielectric breakdown occurs in the bubble (B) across the gas-liquid interface, and discharge occurs. Accompanying this discharge, in the first water tank (21) and the second water tank (31), purified water containing a purification component and a bactericidal factor (active species such as hydroxyl radicals) is generated.

<Seal function>
In the state where the discharge plate (50) is assembled, the O-ring (16) fitted in the ring groove (42) comes into contact with the first side wall (26) to form an annular seal portion. This ensures that the water in each chamber (22, 32) leaks outside the tank unit (20) through the gap between the first side wall (26) and the second side wall (36). Can be prevented.

    In a state where the discharge plate (50) is assembled, the tip of the first inner protrusion (65) of the elastic member (60) contacts the first side wall (26) to form an annular seal portion. At the same time, the tip of the first intermediate protrusion (66) of the elastic member (60) comes into contact with the first side wall (26) to form an annular seal portion. Thereby, it can prevent that the water in a 1st communicating hole (28) leaks to the 2nd communicating hole (38) side through the clearance gap around an elastic member (60).

    Furthermore, an annular first gap (G1) is formed between the first inner protrusion (65) and the first intermediate protrusion (66), and the first gap (G1) is filled with air. When the first gap (G1), which is an air layer, is formed in this manner, water inside the first inner protrusion (65) and water outside the first intermediate protrusion (66) are transferred to the first gap (G1). Intrusion can be prevented by air. Thereby, the sealing performance around the elastic member (60) is further improved.

    Similarly, in the state where the discharge plate (50) is assembled, the tip of the second inner protrusion (67) of the elastic member (60) is in contact with the second side wall (36) (the bottom surface of the annular recess (41)), An annular seal portion is formed. At the same time, the tip of the second intermediate projection (68) of the elastic member (60) comes into contact with the second side wall (36) to form an annular seal portion. Thereby, it can prevent that the water in a 2nd communicating hole (38) leaks to the 1st communicating hole (28) side through the clearance gap around an elastic member (60).

    Further, an annular second gap (G2) is formed between the second inner protrusion (67) and the second inner protrusion (67), and the second gap (G2) is filled with air. When the second gap (G2), which is an air layer, is formed in this way, water inside the second inner protrusion (67) and water outside the second intermediate protrusion (68) are transferred to the second gap (G2). Intrusion can be prevented by air. Thereby, the sealing performance around the elastic member (60) is further improved.

    In a state where the discharge plate (50) is assembled, the tip of the outer protrusion (69) of the elastic member (60) is in contact with the second side wall (36) (the inner peripheral surface of the annular recess (41)), A seal portion is formed. Thereby, the sealing performance around the elastic member (60) is further improved.

-Effect of the embodiment-
According to the embodiment, the discharge plate (50) is sandwiched between the first side wall (26) of the first water tank (21) and the second side wall (36) of the second water tank (31). For this reason, water leakage does not occur around the partition plate as in the conventional structure in which the partition plate is attached to one water tank. Therefore, it is possible to reliably prevent a short circuit from occurring between the first chamber (22) and the second chamber (32) due to such water leakage, and it is possible to discharge stably. .

    Moreover, by releasing the connection of the bolt (15) between the first water tank (21) and the second water tank (31), the discharge plate (50) can be easily removed, and maintenance of the discharge plate (50) Exchanges can be made as appropriate. Here, the fastening hole (27) for fastening the bolt (15) as the connecting member is outside the first chamber (22), and the insertion hole (37) for inserting the bolt (15) is also the second. It is outside the chamber (32). For this reason, there is no risk of water leakage in the fastening hole (27) or the insertion hole (37). Further, by fastening the bolt (15), the O-ring (16), the inner protrusions (65, 67), and the intermediate protrusions (66, 68) are compressed, and the sealing performance thereof can be improved.

    Since the elastic member (60) is provided with a plurality of annular protrusions (65, 66, 67, 68, 69), a plurality of seal portions can be formed around each communication hole (28, 38). Therefore, it can be avoided that water in one communication hole (28, 38) wraps around the elastic member (60) and leaks to the other communication hole (28, 38). A short circuit with the second chamber (32) can be reliably prevented. Moreover, the sealing performance around the elastic member (60) can be further improved by the air layer of the first gap (G1) and the second gap (G2).

    The discharge plate body (51) in which the hole (52) is formed is held by the tank unit (20) via the elastic member (60). When the discharge plate body (51) is vibrated due to discharge or other factors, the discharge plate body (51) may be broken. Since the discharge plate body (51) is extremely thin, such a problem becomes remarkable. However, by interposing an elastic member (60) having elasticity between the discharge plate main body (51) and the tank unit (20), the stress concentration of the discharge plate main body (51) accompanying vibration can be alleviated. Therefore, the discharge plate body (51) can be prevented from cracking.

-Modification of the embodiment-
About the said embodiment, it is good also as a structure of the following modifications.

<Modification 1>
In Modification 1 shown in FIG. 8, in the first water tank (21) of the above-described embodiment, the first main body (21a) and the first side wall (26) are configured as separate bodies (separate members). Moreover, in the modification 1, in the 2nd water tank (31) of the said embodiment, the 2nd main-body part (31a) and the 2nd side wall (36) are comprised by the different body (separate member). Other configurations are the same as those in the above embodiment.

    As shown in the figure, the shapes of the first side wall (26) and the second side wall (36) are relatively complicated. Specifically, a first enlarged diameter portion (28a) and a first straight portion (28b) are formed on the first side wall (26). Further, the second side wall (36) is formed with a second enlarged diameter portion (38a), a second straight portion (38b), an annular recess (41), and a ring groove (42). For this reason, in the 1st water tank (21), if the 1st side wall (26) is integrally formed with a metallic mold etc. with the 1st main part (21a), processing of the 1st water tank (21) will become difficult. Moreover, in the 2nd water tank (31), if the 2nd side wall (36) is integrally molded with a metal mold | die etc. with the 2nd main-body part (31a), the process of a 2nd water tank (31) will become difficult.

    On the other hand, in the first modification, each water tank (21, 31) is a separate member from each main body (21a, 31a). For this reason, even if the shape of the first side wall (26) and the second side wall (36) becomes complicated, these can be formed relatively easily. Other functions and effects are the same as in the above embodiment.

    In addition, each main-body part (21a, 31a) and each side wall (26, 36) can be integrally connected by adhesion | attachment, melt | fusion, welding, fastening, etc. Moreover, you may provide sealing members, such as packing and an O-ring, between each main-body part (21a, 31a) and each side wall (26, 36). Moreover, the main body (21a, 31a) and the side wall (26, 36) of either one of the first water tank (21) and the second water tank (31) are configured as separate members, and the other main body ( 21a, 31a) and the side walls (26, 36) may be integrally formed.

<Modification 2>
The modification 2 shown in FIG.9 and FIG.10 differs from the said embodiment by the point provided with the resin case (70) which covers a discharge plate (50). The resin case (70) includes a first divided body (71) near the first side wall (26) and a second divided body (81) near the second side wall (36), and these divided bodies (71 , 81) with the discharge plate (50) sandwiched between them. Therefore, by attaching the resin case (70) to the discharge plate (50), an integrated discharge plate unit (80) (discharge ASSY) can be configured. In the second modification, the discharge plate (50) is covered with the resin case (70) as described above, thereby simplifying the shapes of the first side wall (26) and the second side wall (36) as compared with the above embodiment. Is planned.

    The first divided body (71) is a disk-shaped resin member having a first case side communication hole (72) formed in the axial center portion thereof. The first case side communication hole (72) is formed coaxially with the first communication hole (28) and the hole (52), and communicates with the first communication hole (28) and the hole (52).

    A plurality of first fastening holes (73) are formed in the outer edge portion of the first divided body (71). The plurality of first fastening holes (73) penetrate the first divided body (71) in the axial direction and are arranged in the circumferential direction at an equal pitch. An annular first ring groove (74) is formed on the outer surface (the surface on the first side wall (26) side) of the first divided body (71). An annular first O-ring (17) is fitted inside the first ring groove (74).

    A first case-side annular recess (75) into which the elastic member (60) is fitted is formed on the inner side surface (the surface on the second side wall (36) side) of the first divided body (71). The first case-side annular recess (75) forms an annular or cylindrical space surrounding the first case-side communication hole (72). On the bottom surface of the first case-side annular concave portion (75), a first case-side annular convex portion (76) that protrudes toward the second side wall (36) is formed. A first case-side inclined surface (77) that is inclined along the first tapered portion (63) of the elastic member (60) is formed on the outer peripheral side of the first case-side annular convex portion (76).

    The second divided body (81) is a disk-shaped resin member having a second case side communication hole (82) formed in the axial center portion thereof. The second case side communication hole (82) is formed coaxially with the second communication hole (38) and the hole (52), and communicates with the second communication hole (38) and the hole (52).

    A plurality of second fastening holes (83) are formed in the outer edge portion of the second divided body (81). The plurality of second fastening holes (83) penetrate the second divided body (81) in the axial direction and are arranged in the circumferential direction at an equal pitch. An annular second ring groove (84) is formed on the outer surface (surface on the second side wall (36) side) of the second divided body (81). An annular second O-ring (18) is fitted inside the second ring groove (84).

    A second case-side annular recess (85) into which the elastic member (60) is fitted is formed on the inner side surface (the surface on the first side wall (26) side) of the second divided body (81). The second case side annular recess (85) forms an annular or cylindrical space surrounding the second case side communication hole (86). On the bottom surface of the second case-side annular concave portion (85), a second case-side annular convex portion (86) protruding toward the first side wall (26) side is formed. A second case-side inclined surface (87) that is inclined along the second tapered portion (64) of the elastic member (60) is formed on the outer peripheral side of the second case-side annular convex portion (86).

    The 1st communicating hole (28) of the 1st side wall (26) of the modification 2 does not have the 1st linear part (28b) of the said embodiment, but is comprised only by the 1st enlarged diameter part (28a). A first annular recess (43) into which the resin case (70) (strictly speaking, the first divided body (71)) is fitted is formed in the first side wall (26). On the other hand, the first annular protrusion (29) of the above embodiment is not formed on the first side wall (26).

    The 2nd communicating hole (38) of the 2nd side wall (36) of the modification 2 does not have the 2nd linear part (38b) of the said embodiment, but is comprised only by the 2nd enlarged diameter part (38a). A second annular recess (44) in which the resin case (70) (strictly speaking, the second divided body (81)) is fitted is formed in the second side wall (36). On the other hand, the 2nd annular convex part (39) of the above-mentioned embodiment is not formed in the 2nd side wall (36).

    In the work of assembling the discharge plate (50) of the second modification, the discharge plate (50) is sandwiched between the first divided body (71) and the second divided body (81). At this time, the elastic member (60) is fitted into the first annular recess (43) of the first divided body (71) and the second annular recess (44) of the second divided body (81). In this state, the bolts and nuts (88) are respectively inserted into the first fastening holes (73) and the second fastening holes (83) to connect the first divided body (71) and the second divided body (81). Let Thereby, the discharge plate unit (80) in which the discharge plate (50) and the resin case (70) are integrated can be configured. By performing the assembly work of the discharge plate unit (80) in parallel with other processes, the assembly efficiency can be improved.

    In the discharge plate unit (80), the protrusions (65, 66, 67, 68) of the elastic member (60) are in close contact with the resin case (70) to form a plurality of seal portions. Thereby, the water leak around an elastic member (60) can be prevented similarly to the said embodiment.

    Next, the first O-ring (17) is fitted in the first ring groove (74) of the discharge plate unit (80), and the second O-ring (18) is fitted in the second ring groove (84). Let The discharge plate (50) is sandwiched between the first side wall (26) of the first water tank (21) and the second side wall (36) of the second water tank (31). At this time, the resin case (70) is fitted into the first annular recess (43) and the second annular recess (44).

    Next, as in the above embodiment, the first water tank (21) and the second water tank (31) are connected to each other by bolts (15). As a result, the discharge plate unit (80) is held inside the tank unit (20). In this assembled state, the first O-ring (17) and the first side wall (26) come into contact with each other to form an annular seal portion, and the second O-ring (18) and the second side wall (36). And an annular seal portion is formed. Thereby, it is possible to reliably prevent water leakage around the resin case (70).

    In the second modification, the discharge plate unit (80) is configured by covering the discharge plate (50) with the resin case (70), whereby the shapes of the first side wall (26) and the second side wall (36) can be simplified. For this reason, in the 1st water tank (21), a 1st main-body part (21a) and a 1st side wall (26) can be easily integrally formed with a metal mold | die. Similarly, in the second water tank (31), the second main body portion (36) and the second side wall (36) can be easily integrally formed with a mold or the like. Thereby, reduction of manufacturing time thru | or manufacturing cost can be aimed at. Other functions and effects are the same as in the above embodiment.

<< Other Embodiments >>
In the above-described embodiment (including modifications), the following configuration may be adopted.

    You may use members other than a nut as a connection member which connects a 1st water tank (21) and a 2nd water tank (31). Specifically, for example, a claw portion is formed on one of the first side wall (26) and the second side wall (36), a convex portion is formed on the other side, and the claw portion is engaged with the convex portion, whereby the first water tank (21 ) And the second water tank (31) may be combined.

    Means other than the O-ring may be used as means for preventing water leakage between the first chamber (22) and the second chamber (32). For example, packing, a sealing material, an adhesive agent, etc. can be used.

    The size and type of the first water tank (21) and the second water tank (31) can be changed according to the application.

    The discharge device can be applied to devices other than the purified water generator. The discharge device can be applied to, for example, a water treatment device that purifies water or a humidifier.

    As described above, the present invention is useful for a discharge device.

21 1st water tank 21a 1st main-body part 22 1st chamber 26 1st side wall 28 1st communicating hole 31 2nd water tank 31a 1st main-body part 36 1st side wall 38 2nd communicating hole 41 Annular recessed part (recessed part)
50 Discharge plate 51 Discharge plate body 52 Hole 60 Elastic member 60a First side end surface 60b Second side end surface 61 Through hole 65, 67 Inner protrusion (protrusion)
66, 68 Intermediate protrusion (protrusion)
70 Resin case 90 Power supply 91 First electrode 94 Second electrode

    The present invention relates to a discharge device.

    Conventionally, there is a discharge device that discharges between electrodes in water. Patent Document 1 discloses this type of discharge device.

    The discharge device of Patent Document 1 includes one water tank and a partition plate that divides the inside of the water tank into a first chamber and a second chamber. A first electrode is provided in the water in the first chamber, and a second electrode is provided in the water in the second chamber. The partition plate of Patent Document 1 holds a discharge plate having fine holes (discharge holes). The first chamber and the second chamber communicate with each other through this hole.

    When a potential difference is applied from the power source to the pair of electrodes, the current density in the discharge holes increases and water is vaporized by Joule heat. Thereby, bubbles are generated inside the discharge holes, and the water in the two storage chambers is divided by the bubbles. When a potential difference is continuously applied to the pair of electrodes in this state, the interface on the first chamber side and the interface on the second chamber side sandwiching the bubbles become pseudo electrodes, and a discharge occurs between the interfaces. Done. Accompanying this discharge, active species such as hydroxyl radicals are generated in water.

Japanese Patent Laid-Open No. 2006-123917

    In patent document 1, a partition plate is attached to the inside of a water tank so that attachment or detachment is possible. Further, the partition plate is configured to be splittable in the thickness direction, and the partition plate is held between the two split bodies. With this structure, only the discharge plate can be detached independently by removing the partition plate from the water tank and dividing the partition plate. Therefore, maintenance and replacement of the discharge plate can be performed easily.

    However, when the partition plate is configured to be detachable with respect to the water tank, the outer peripheral edge portions (left and right side edge portions and lower edge portions) of the partition plate are interposed in the two chambers. And the distance of the clearance gap around a partition plate is comparatively short. For this reason, when the seal | sticker of the clearance gap between a water tank and a partition plate becomes inadequate, there existed a problem which water leakage and by extension electric current leaked between the 1st chamber and the 2nd chamber, and desired discharge could not be continued.

    The present invention has been made paying attention to such a problem, and the purpose of the discharge is to enable the discharge plate to be easily removed and to prevent water leakage between the first chamber and the second chamber. It is to propose a device.

The first invention provides a power source (90), two electrodes (91, 94) connected to the power source (90), and chambers (22, 32) in which water conducting to each electrode (91, 94) is stored. ) And two water tanks (21, 31) each having a side wall (26, 36) in which a communication hole (28, 38) communicating with the chamber (22, 32) is formed, and for generating discharge A discharge plate (50) having a hole (52), and the two water tanks (21, 31) have two communication holes (28, 38) in two side walls (26, 36). The discharge plate (50) is configured to be connected to each other with the discharge plate (50) interposed therebetween, and the discharge plate (50) includes a disc-shaped discharge plate body (51) in which the hole (52) is formed. A disc-shaped elastic member (60) having a through hole (61) that holds the discharge plate body (51) inside and exposes the hole (52) of the discharge plate body (51) to the outside, The two tanks (21, 31) Side walls (26, 36) of a discharge device according to claim Rukoto is connectable configured to each other in the state sandwiching an elastic member (60).

Here, the elastic member (60) may be directly sandwiched between the side walls (26, 36) so as to be in contact with the two side walls (26, 36), or the two side walls (26, 36). It may be sandwiched indirectly via other members.

    In the first invention, the discharge plates (50) are connected to each other with the discharge plates (50) sandwiched between the side walls (26, 36) of the two water tanks (21, 31). In this state, each chamber (22, 32) of each water tank (21, 31) communicates with the hole (52) via each communication hole (28, 38). When a voltage is applied to each electrode from the power supply (90), a current flows from one chamber (22, 32) to the other chamber (22, 32), and the current density in the hole (52) increases. As a result, bubbles are generated inside the hole (52), and as a result, discharge is performed inside the hole (52).

    In the present invention, the discharge plate (50) is sandwiched and held between the two water tanks (21, 31). That is, the side walls (26, 36) of each water tank (21, 31) also serve as a holding member for sandwiching the discharge plate (50). In this structure, unlike the conventional example described above, the periphery of the partition plate does not face the two chambers, and water does not leak around the partition plate. In the present invention, the discharge plate (50) can be removed from the discharge device (10) by releasing the connection between the water tanks (21, 31) and separating them.

In the discharge plate (50) of the first invention, the discharge plate body (51) in which the hole (52) is formed is covered with a disk-shaped elastic member (60), and the elastic member (60) has two side walls. (26,36). For this reason, even if the discharge plate (50) is vibrated due to discharge or the like, the stress concentration acting on the discharge plate (50) can be relaxed by the elastic member (60). As a result, it is possible to prevent the discharge plate (50) from being cracked due to vibration.

    Further, the periphery of the discharge plate (50) can be sealed by bringing the elastic member (60) into close contact with the side walls (26, 36) and the outer surfaces of other members. That is, water that has passed through the communication hole (28, 38) from one chamber (22, 32) may wrap around the discharge plate (50) and leak into the other chamber (22, 32). There is. However, such a water leak can be avoided by bringing the elastic member (60) into close contact with the side walls (26, 36) and other members.

According to a second invention, in the first invention, at least one of the side end surfaces (60a, 60b) on both sides in the axial direction of the elastic member (60) is an annular projection surrounding the through hole (61). The discharge unit is characterized in that (65, 66, 67, 68) is formed.

In the second invention, the annular protrusions (65, 66, 67, 68) of the elastic member (60) are brought into contact with the side walls (26, 36) of the water tank (21, 31) or other members, thereby forming an annular shape. The seal portion is formed. As a result, the water that has passed through the communication hole (28, 38) from one chamber (22, 32) goes around the discharge plate (50) and leaks into the other chamber (22, 32). This can be prevented by the annular protrusions (65, 66, 67, 68).

In a third aspect based on the second aspect, the first annular protrusion ( 65,67 ) and the first annular protrusion are formed on the side end surfaces (60a, 60b) of the elastic member (60). a discharge unit, wherein the second annular projection surrounding the (65, 67) and (66, 68) are formed.

In the third invention, the two annular protrusions (65, 66, 67, 68) of the elastic member (60) are in contact with the side walls (26, 36) of the water tank (21, 31) or other members, respectively. Thus, two annular seal portions are formed. Thereby, the water in one chamber (22, 32) can be prevented from leaking into the other chamber (22, 32) by the two seal portions.

    In the state where air exists between the two annular protrusions (65, 66, 67, 68), the water around the annular protrusion (65, 66, 67, 68) , 67, 68) can be prevented by this air. Thereby, it can prevent more reliably that the water of one chamber (22, 32) leaks to the other chamber (22, 32).

Fourth invention, in any one invention of the first to third, wherein at least one of the side walls of the two water tank (21, 31) (36), said elastic member (60) The discharge device is characterized in that a recess (41) to be internally fitted is formed.

In the fourth invention, the elastic member (60) is fitted into the recess (41) formed in the side wall (36) of the water tank (31), so that the discharge plate (50) is attached to the two side walls (26, 36). It can be securely held in between.

In a fifth aspect based on the fourth aspect , the side wall (36) in which the concave portion (41) is formed is constituted by a separate member separable from the main body (31a) of the corresponding water tank (31). It is the discharge device characterized by this.

In 5th invention, it can isolate | separate from the side wall (36) in which the said recessed part (41) is formed, and the main-body part (31a) of a water tank (31). Here, since the communication hole (38) and the recess (41) are formed in the side wall (36), when the side wall (36) is integrated with the water tank (31), the processing of the side wall (36) is performed. It becomes difficult. Specifically, for example, it is difficult to integrally form the communication hole (38) and the recess (41) of the side wall (36) together with the wall and bottom of the water tank (31) with a mold or the like. In contrast, in the present invention, since the side wall (36) and the main body (31a) of the water tank (31) can be manufactured separately, the communication hole (38) and the recess (41) of the side wall (36) are also easily formed. it can.

According to a sixth aspect, in any one invention of the first to third, with the elastic member (60) the shape of the resin case along the outer shape of (70), the side wall of each aquarium (21, 31) (26, 36) is formed integrally with the main body (21a, 31a) of the corresponding water tank (21, 31), and the resin case (70) is sandwiched between the two side walls (26, 36). It is the discharge device characterized by this.

In the sixth invention, the resin case (70) covering the elastic member (60) is between the two side walls (26, 36) integrated with the main body (21a, 31a) of each water tank (21, 31). Sandwiched between. By covering the elastic member (60) with the resin case (70), the discharge plate (50) and the resin case (70) can be configured as an integral unit, and the outer shape of the unit can be simplified. For this reason, the shape of the side walls (26, 36) sandwiching the resin case (70) is not complicated. As a result, the resin case (70) can be held between the side walls (26, 36) while being integrally formed with the water tanks (21, 31).

    According to the present invention, since the discharge plate (50) is sandwiched between the side walls (26, 36) of the two water tanks (21, 31), water leakage occurs around the partition portion as in the conventional example. There is no. As a result, water leakage or current leakage between the chambers (22, 32) can be prevented, and stable discharge can be performed. Further, according to the present invention, the discharge plate (50) can be easily removed by releasing the connection between the two water tanks (21, 31). Therefore, replacement and maintenance of the discharge plate (50) can be easily performed.

FIG. 1 is a perspective view illustrating an overall configuration of a main part of a discharge device according to an embodiment. FIG. 2 is a top view of a main part of the discharge device according to the embodiment. FIG. 3 is a longitudinal sectional view of a main part of the discharge device according to the embodiment. FIG. 4 is an assembled perspective view of a main part of the discharge device according to the embodiment. FIG. 5 is a transverse cross-sectional view showing an assembled state of the discharge plate of the discharge device according to the embodiment. FIG. 6 is a perspective view in which a part of the discharge plate is broken. FIG. 7 is a diagram schematically showing the state of generation of bubbles in the holes of the discharge plate. FIG. 8 is a transverse cross-sectional view showing an assembled state of the discharge plate of the discharge device according to the first modification. FIG. 9 is an assembled perspective view of the main part of the discharge device according to the second modification. FIG. 10 is a transverse cross-sectional view illustrating an assembled state of the discharge plate of the discharge device according to the second modification.

    Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its application, or its use.

    The discharge device according to the present invention is applied to, for example, a purified water generation device (10). The purified water generating device (10) generates purified water containing a purified component and a sterilizing factor along with the discharge. The produced purified water is used for cleaning and sterilizing an object (for example, dentures). The purified water generator (10) includes a tank unit (20), a power source (90), a first electrode (91), and a second electrode (94).

<Overall configuration of tank unit>
As shown in FIGS. 1 to 4, the tank unit (20) includes a first water tank (21), a second water tank (31), a discharge plate (50), and a plurality of connecting members (bolts (15)). ing. The first water tank (21) and the second water tank (31) constitute a container whose upper side is opened. The first water tank (21) and the second water tank (31) are made of an insulating resin material, for example. In the present embodiment, the first water tank (21) is disposed on the left side, and the second water tank (31) is disposed on the right side. A 1st water tank (21) and a 2nd water tank (31) are connected with a some volt | bolt (15) in the state adjacent to right and left.

    A first chamber (22) for storing water is formed in the first water tank (21), and a second chamber (32) for storing water is formed in the second water tank (31). In this embodiment, the height of the first water tank (21) and the second water tank (31) is equal, and the volume of the first chamber (22) is larger than the volume of the second chamber (32). Specifically, the front and rear lengths of the first chamber (22) are larger than the front and rear lengths of the second chamber (32), and the left and right widths of the first chamber (22) are the second chamber (32). It is larger than the left and right widths.

    The first water tank (21) includes a first bottom wall portion (23), a first peripheral wall portion (24) erected so as to surround the first bottom wall portion (23), and a first peripheral wall portion (24). And a first flange (25) continuous to the upper end. The first bottom wall (23) is formed in a substantially rectangular plate shape. A 1st surrounding wall part (24) is formed in a substantially rectangular cylinder shape. The first flange portion (25) is formed in a substantially rectangular frame shape that extends radially outward from the upper end of the first peripheral wall portion (24).

    Of the first peripheral wall portion (24), the side wall facing the second water tank (31) constitutes the first side wall (26). Both end portions in the front-rear direction of the first side wall (26) are thicker than their intermediate portions. Fastening holes (27) to which the bolts (15) are fastened are formed in these thick portions (see FIG. 2). Each fastening hole (27) is formed to be recessed horizontally from the second water tank (31) side toward the left side. A thread groove into which the bolt (15) is screwed is formed on the inner peripheral surface of each fastening hole (27). A first communication hole (28) communicating with the first chamber (22) is formed in the central portion of the first side wall (26).

    The second water tank (31) includes a second bottom wall portion (33), a second peripheral wall portion (34) standing so as to surround the second bottom wall portion (33), and a second peripheral wall portion (34). A second flange (35) continuous to the upper end. The second bottom wall (33) is formed in a substantially rectangular plate shape. The second peripheral wall portion (34) is formed in a substantially rectangular cylindrical shape. The second flange portion (35) is formed in a substantially rectangular frame shape that extends radially outward from the upper end of the second peripheral wall portion (34).

    Insertion holes (37) for inserting bolts (15) are formed in the front side portion and the rear side portion of the second peripheral wall portion (34), respectively. Each insertion hole (37) is formed to be recessed horizontally from the right wall portion of the second water tank (31) toward the first water tank (21) side, and with the fastening hole (27) of the first water tank (21). Communicate.

    Of the second peripheral wall portion (34), the side wall facing the first water tank (21) constitutes the second side wall (36). A second communication hole (38) communicating with the second chamber (32) is formed in the central portion of the second side wall (36).

    The discharge plate (50) is sandwiched between the first side wall (26) of the first water tank (21) and the second side wall (36) of the second water tank (31). Details of the discharge plate (50) will be described later.

<Power supply>
The power source (90) schematically shown in FIG. 3 applies a potential difference to the first electrode (91) and the second electrode (94). The power supply (90) of this embodiment applies a high voltage of an alternating waveform (square wave) in which positive and negative are switched with respect to the first electrode (91) and the second electrode (94). It is preferable that the duty ratio of the alternating waveform has the same ratio between the positive electrode side and the negative electrode side. The voltage applied from the power source (90) to the first electrode (91) and the second electrode (94) is not limited to a square wave, and may be, for example, a sine wave.

<First electrode>
As shown in FIGS. 1-3, the 1st electrode (91) is provided in the side wall vicinity of the left side of a 1st water tank (21). The first electrode (91) of the present embodiment is configured by folding a thin metal plate. An intermediate portion between one end (upper end) and the other end (lower end) of the first electrode (91) is embedded in the first water tank (21). One end of the first electrode (91) is exposed to the upper side from the left side edge of the first flange (25). The exposed portion on one end side of the first electrode (91) constitutes a first energization section (92) that energizes the power source (90). The other end of the first electrode (91) is exposed from the inner wall side of the first peripheral wall portion (24) to the inside of the first chamber (22). The exposed part on the other end side of the first electrode (91) constitutes a first electrode part (93) immersed in the water of the first chamber (22). The 1st electrode part (93) of this embodiment exists in a position higher than the 1st communicating hole (28).

<Second electrode>
As shown in FIGS. 1 to 3, the second electrode (94) is provided near the right side wall of the second water tank (31). The second electrode (94) of the present embodiment is configured by folding a thin metal plate. An intermediate portion between one end (upper end) and the other end (lower end) of the second electrode (94) is embedded in the second water tank (31). One end of the second electrode (94) is exposed to the upper side from the right edge of the second collar portion (35). The exposed part on the one end side of the second electrode (94) constitutes a second energization section (95) that energizes the power source (90). The other end of the second electrode (94) is exposed to the inside of the second chamber (32) from the inner wall side of the second peripheral wall portion (34). The exposed part on the other end side of the second electrode (94) constitutes a second electrode part (96) immersed in the water of the second chamber (32). The 2nd electrode part (96) of this embodiment exists in a position higher than the 2nd communicating hole (38), and exists in the same height position as the 1st electrode part (93).

<Detailed structure of discharge plate>
The discharge plate (50) shown in FIGS. 3 to 6 is held between the first side wall (26) and the second side wall (36). The discharge plate (50) includes a disc-shaped discharge plate body (51) and an elastic member (60) that covers the outer peripheral edge of the discharge plate body (51). The discharge plate body (51) is made of an insulating material (for example, a ceramic material). The elastic member (60) is made of an insulating resin material (for example, a silicon material) having elasticity.

    The discharge plate body (51) is formed in a circular thin plate shape, and a fine circular hole (52) is formed in the axial center portion thereof. The thickness of the discharge plate body (51) is, for example, 0.5 mm, and the inner diameter of the hole (52) is, for example, 50 μm.

    The elastic member (60) is formed in a disc shape in which a through hole (61) is provided in the axial center portion thereof. The elastic member (60) covers a portion of the discharge plate body (51) on the outer peripheral side of the hole (52). Specifically, a disk-shaped fitting groove (62) that extends radially outward from the through hole (61) is formed inside the elastic member (60). The outer peripheral edge of the elastic member (60) is fitted in the fitting groove (62).

    In the discharge plate (50), the elastic member (60) and the discharge plate body (51) are coaxial, and the through hole (61) and the hole (52) overlap each other in the axial direction. Therefore, the open ends on both sides of the hole (52) are exposed to the outside through the open ends of the through hole (61).

    As shown in FIG.5 and FIG.6, the 1st taper part (63) and the 2nd taper part (64) are formed in the through-hole (61) of an elastic member (60). The first taper portion (63) is formed on the first side wall (26) side. The second taper portion (64) is formed on the second side wall (36) side. The first taper part (63) reduces the inner diameter of the through hole (61) as it approaches the discharge plate body (51) (right side). The second taper portion (64) reduces the inner diameter of the through hole (61) as it approaches the discharge plate body (51) (left side).

    Two inner protrusions (65, 67), two intermediate protrusions (66, 68), and one outer protrusion (69) are formed on the surface of the elastic member (60). These protrusions (65, 66, 67, 68, 69) are each formed in an annular shape surrounding the through hole (61).

    Specifically, a first inner protrusion (65) and a first intermediate protrusion (66) are formed on one (left side) first side end surface (60a) in the thickness direction of the elastic member (60). A second inner protrusion (67) and a second intermediate protrusion (68) are formed on the second (right) second side end face (60b) in the thickness direction of the elastic member (60). The first inner protrusion (65) and the second inner protrusion (67) constitute an annular first protrusion surrounding the through hole (61). The first intermediate protrusion (66) and the second intermediate protrusion (68) constitute an annular second protrusion that surrounds the first protrusion.

    The first inner protrusion (65) and the second inner protrusion (67) are formed in an annular shape along the inner edge of the through hole (61). The first inner protrusion (65) projects horizontally from the first side end face (60a) toward the first side wall (26). The second inner protrusion (67) protrudes horizontally from the second side end face (60b) toward the second side wall (36).

    The first intermediate protrusion (66) and the second intermediate protrusion (68) are formed at an intermediate portion between the outer edge and the inner edge of the elastic member (60). The first intermediate protrusion (66) is formed in an annular shape that is coaxial and parallel to the first inner protrusion (65). The second intermediate protrusion (68) is formed in an annular shape that is coaxial and parallel to the second inner protrusion (67). The first intermediate protrusion (66) protrudes horizontally from the first side end face (60a) toward the first side wall (26). The second intermediate protrusion (68) protrudes horizontally from the second side end face (60b) toward the second side wall (36).

<First side wall>
As shown in FIG. 5, the 1st side wall (26) of this embodiment is formed integrally with the 1st main-body part (21a) of a 1st water tank (21). Here, the 1st main-body part (21a) of this embodiment is a member except a 1st side wall (26) among 1st water tanks (21).

    The first communication hole (28) described above is formed in the first side wall (26). The first communication hole (28) includes, in order from the first chamber (22) toward the discharge plate main body (51), a first enlarged diameter portion (28a) and a first straight portion (28b). The first enlarged-diameter portion (28a) is formed in a substantially trapezoidal conical shape that increases the inner diameter as it approaches the first chamber (22). The first straight part (28b) is continuous with the end on the back side of the first enlarged diameter part (28a). The first straight portion (28b) forms a cylindrical inner peripheral surface having the same inner diameter across both ends in the axial direction.

    A first annular protrusion (29) is formed on the outer surface of the first side wall (26) so as to protrude toward the right side (second side wall (36)). The first annular protrusion (29) is formed in a substantially cylindrical shape along the inner edge of the first communication hole (28). A first inclined surface (29a) that is inclined with respect to the axial center of the first communication hole (28) is formed on the outer peripheral side of the first annular protrusion (29). The first inclined surface (29a) has a shape along the first tapered portion (63) of the elastic member (60).

<Second side wall>
As shown in FIG. 5, the 2nd side wall (36) of this embodiment is formed integrally with the 2nd main-body part (31a) of a 2nd water tank (31). Here, the 2nd main-body part (31a) of this embodiment is a member except a 2nd side wall (36) among 2nd water tanks (31).

    The second communication hole (38) described above is formed in the second side wall (36). The second communication hole (38) includes, in order from the second chamber (32) toward the discharge plate main body (51), a second enlarged diameter portion (38a) and a second linear portion (38b). The second expanded diameter portion (38a) is formed in a substantially trapezoidal cone shape that expands the inner diameter as it approaches the second chamber (32). The second straight portion (38b) is continuous with the end on the back side of the second enlarged diameter portion (38a). The second straight portion (38b) forms a cylindrical inner peripheral surface having the same inner diameter across both ends in the axial direction.

    An annular recess (41) in which the elastic member (60) of the discharge plate (50) is fitted is formed on the outer surface of the second side wall (36). The annular recess (41) forms a substantially cylindrical space surrounding the second communication hole (38). A second annular convex portion (39) is formed on the bottom surface of the annular concave portion (41) so as to protrude toward the left side (first side wall (26)). The second annular protrusion (39) is formed in a substantially cylindrical shape along the inner edge of the second communication hole (38). A second inclined surface (39a) that is inclined with respect to the axial center of the second communication hole (38) is formed on the outer peripheral side of the second annular convex portion (39). The second inclined surface (39a) has a shape along the second tapered portion (64) of the elastic member (60).

    A ring groove (42) is formed on the outer surface of the second side wall (36). The ring groove (42) is formed in an annular shape formed around the annular recess (41). An annular O-ring (16) is fitted inside the ring groove (42).

<Discharge plate assembly work>
As shown in FIG. 4, in the assembly work, a first water tank (21), a second water tank (31), a discharge plate (50), and an O-ring (16) are prepared. The discharge plate (50) is in a state where an elastic member (60) is mounted around the discharge plate body (51). Next, the O-ring (16) is fitted into the ring groove (42) of the second water tank (31), and the discharge plate (50) is fitted into the annular recess (41) of the second water tank (31). At this time, the second taper part (64) of the elastic member (60) is externally fitted to the second annular convex part (39) of the second water tank (31).

    Then, the 1st side wall (26) of a 1st water tank (21) and the 2nd side wall (36) of a 2nd water tank (31) are made to contact. At this time, the first tapered portion (63) of the elastic member (60) is externally fitted to the first annular convex portion (29) of the first water tank (21).

    In this state, a plurality of bolts (15) are inserted into the insertion holes (37) of the second water tank (31), and these bolts (15) are inserted into the fastening holes (27) of the first water tank (21). To be fastened. Thereby, a 1st water tank (21) and a 2nd water tank (31) are connected with a volt | bolt (15). As a result, the discharge plate (50) is sandwiched and held between the first side wall (26) and the second side wall (36).

    In the state where the discharge plate (50) is assembled in the tank unit (20) as described above, the first communication hole (28) of the first water tank (21) and the hole (52 of the discharge plate (50)) ) And the second communication hole (38) of the second water tank (31) are coaxial with each other so that they communicate with each other.

<Discharge plate removal work>
On the other hand, when removing the discharge plate (50) from the tank unit (20), an operation opposite to the above-described assembly operation is performed. That is, the fastening of each bolt (15) is released, and the first water tank (21) and the second water tank (31) are separated from each other. Thereby, a discharge plate (50) can be removed easily and a discharge plate (50) can be maintained and replaced.

<Driving operation>
During operation of the purified water generator (10), water is stored in the first chamber (22) of the first water tank (21) and the second chamber (32) of the second water tank (31). Accordingly, the first electrode part (93) is immersed in the water of the first chamber (22), and the second electrode part (96) is immersed in the water of the second chamber (32). In this state, a square wave voltage is applied from the power source (90) to both electrodes (91, 94). Then, an electric current flows from one chamber (22, 32) to the other chamber (22, 32) through the hole (52).

    Since the hole diameter of the hole (52) is extremely small, the current density of the current path in the hole (52) increases. Then, Joule heat generated inside the hole (52) is increased, and water in the hole (52) is vaporized to form bubbles (B) (see FIG. 7). The bubbles (B) are formed across both ends of the hole (52) in the axial direction.

    In this state, the first chamber (22) and the second chamber (32) are electrically separated by the bubbles (B). That is, the bubble (B) functions as an insulation resistor that blocks conduction between the water in the first chamber (22) and the water in the second chamber (32). As a result, at the gas-liquid interface of the bubbles (B), the interface corresponding to the first chamber (22) and the interface corresponding to the second chamber (32) are respectively pseudo electrodes, and the potential difference between these electrodes is Increase. As a result, in the bubble (B), dielectric breakdown occurs in the bubble (B) across the gas-liquid interface, and discharge occurs. Accompanying this discharge, in the first water tank (21) and the second water tank (31), purified water containing a purification component and a bactericidal factor (active species such as hydroxyl radicals) is generated.

<Seal function>
In the state where the discharge plate (50) is assembled, the O-ring (16) fitted in the ring groove (42) comes into contact with the first side wall (26) to form an annular seal portion. This ensures that the water in each chamber (22, 32) leaks outside the tank unit (20) through the gap between the first side wall (26) and the second side wall (36). Can be prevented.

    In a state where the discharge plate (50) is assembled, the tip of the first inner protrusion (65) of the elastic member (60) contacts the first side wall (26) to form an annular seal portion. At the same time, the tip of the first intermediate protrusion (66) of the elastic member (60) comes into contact with the first side wall (26) to form an annular seal portion. Thereby, it can prevent that the water in a 1st communicating hole (28) leaks to the 2nd communicating hole (38) side through the clearance gap around an elastic member (60).

    Furthermore, an annular first gap (G1) is formed between the first inner protrusion (65) and the first intermediate protrusion (66), and the first gap (G1) is filled with air. When the first gap (G1), which is an air layer, is formed in this manner, water inside the first inner protrusion (65) and water outside the first intermediate protrusion (66) are transferred to the first gap (G1). Intrusion can be prevented by air. Thereby, the sealing performance around the elastic member (60) is further improved.

    Similarly, in the state where the discharge plate (50) is assembled, the tip of the second inner protrusion (67) of the elastic member (60) is in contact with the second side wall (36) (the bottom surface of the annular recess (41)), An annular seal portion is formed. At the same time, the tip of the second intermediate projection (68) of the elastic member (60) comes into contact with the second side wall (36) to form an annular seal portion. Thereby, it can prevent that the water in a 2nd communicating hole (38) leaks to the 1st communicating hole (28) side through the clearance gap around an elastic member (60).

    Further, an annular second gap (G2) is formed between the second inner protrusion (67) and the second inner protrusion (67), and the second gap (G2) is filled with air. When the second gap (G2), which is an air layer, is formed in this way, water inside the second inner protrusion (67) and water outside the second intermediate protrusion (68) are transferred to the second gap (G2). Intrusion can be prevented by air. Thereby, the sealing performance around the elastic member (60) is further improved.

    In a state where the discharge plate (50) is assembled, the tip of the outer protrusion (69) of the elastic member (60) is in contact with the second side wall (36) (the inner peripheral surface of the annular recess (41)), A seal portion is formed. Thereby, the sealing performance around the elastic member (60) is further improved.

-Effect of the embodiment-
According to the embodiment, the discharge plate (50) is sandwiched between the first side wall (26) of the first water tank (21) and the second side wall (36) of the second water tank (31). For this reason, water leakage does not occur around the partition plate as in the conventional structure in which the partition plate is attached to one water tank. Therefore, it is possible to reliably prevent a short circuit from occurring between the first chamber (22) and the second chamber (32) due to such water leakage, and it is possible to discharge stably. .

    Moreover, by releasing the connection of the bolt (15) between the first water tank (21) and the second water tank (31), the discharge plate (50) can be easily removed, and maintenance of the discharge plate (50) Exchanges can be made as appropriate. Here, the fastening hole (27) for fastening the bolt (15) as the connecting member is outside the first chamber (22), and the insertion hole (37) for inserting the bolt (15) is also the second. It is outside the chamber (32). For this reason, there is no risk of water leakage in the fastening hole (27) or the insertion hole (37). Further, by fastening the bolt (15), the O-ring (16), the inner protrusions (65, 67), and the intermediate protrusions (66, 68) are compressed, and the sealing performance thereof can be improved.

    Since the elastic member (60) is provided with a plurality of annular protrusions (65, 66, 67, 68, 69), a plurality of seal portions can be formed around each communication hole (28, 38). Therefore, it can be avoided that water in one communication hole (28, 38) wraps around the elastic member (60) and leaks to the other communication hole (28, 38). A short circuit with the second chamber (32) can be reliably prevented. Moreover, the sealing performance around the elastic member (60) can be further improved by the air layer of the first gap (G1) and the second gap (G2).

    The discharge plate body (51) in which the hole (52) is formed is held by the tank unit (20) via the elastic member (60). When the discharge plate body (51) is vibrated due to discharge or other factors, the discharge plate body (51) may be broken. Since the discharge plate body (51) is extremely thin, such a problem becomes remarkable. However, by interposing an elastic member (60) having elasticity between the discharge plate main body (51) and the tank unit (20), the stress concentration of the discharge plate main body (51) accompanying vibration can be alleviated. Therefore, the discharge plate body (51) can be prevented from cracking.

-Modification of the embodiment-
About the said embodiment, it is good also as a structure of the following modifications.

<Modification 1>
In Modification 1 shown in FIG. 8, in the first water tank (21) of the above-described embodiment, the first main body (21a) and the first side wall (26) are configured as separate bodies (separate members). Moreover, in the modification 1, in the 2nd water tank (31) of the said embodiment, the 2nd main-body part (31a) and the 2nd side wall (36) are comprised by the different body (separate member). Other configurations are the same as those in the above embodiment.

    As shown in the figure, the shapes of the first side wall (26) and the second side wall (36) are relatively complicated. Specifically, a first enlarged diameter portion (28a) and a first straight portion (28b) are formed on the first side wall (26). Further, the second side wall (36) is formed with a second enlarged diameter portion (38a), a second straight portion (38b), an annular recess (41), and a ring groove (42). For this reason, in the 1st water tank (21), if the 1st side wall (26) is integrally formed with a metallic mold etc. with the 1st main part (21a), processing of the 1st water tank (21) will become difficult. Moreover, in the 2nd water tank (31), if the 2nd side wall (36) is integrally molded with a metal mold | die etc. with the 2nd main-body part (31a), the process of a 2nd water tank (31) will become difficult.

    On the other hand, in the first modification, each water tank (21, 31) is a separate member from each main body (21a, 31a). For this reason, even if the shape of the first side wall (26) and the second side wall (36) becomes complicated, these can be formed relatively easily. Other functions and effects are the same as in the above embodiment.

    In addition, each main-body part (21a, 31a) and each side wall (26, 36) can be integrally connected by adhesion | attachment, melt | fusion, welding, fastening, etc. Moreover, you may provide sealing members, such as packing and an O-ring, between each main-body part (21a, 31a) and each side wall (26, 36). Moreover, the main body (21a, 31a) and the side wall (26, 36) of either one of the first water tank (21) and the second water tank (31) are configured as separate members, and the other main body ( 21a, 31a) and the side walls (26, 36) may be integrally formed.

<Modification 2>
The modification 2 shown in FIG.9 and FIG.10 differs from the said embodiment by the point provided with the resin case (70) which covers a discharge plate (50). The resin case (70) includes a first divided body (71) near the first side wall (26) and a second divided body (81) near the second side wall (36), and these divided bodies (71 , 81) with the discharge plate (50) sandwiched between them. Therefore, by attaching the resin case (70) to the discharge plate (50), an integrated discharge plate unit (80) (discharge ASSY) can be configured. In the second modification, the discharge plate (50) is covered with the resin case (70) as described above, thereby simplifying the shapes of the first side wall (26) and the second side wall (36) as compared with the above embodiment. Is planned.

    The first divided body (71) is a disk-shaped resin member having a first case side communication hole (72) formed in the axial center portion thereof. The first case side communication hole (72) is formed coaxially with the first communication hole (28) and the hole (52), and communicates with the first communication hole (28) and the hole (52).

    A plurality of first fastening holes (73) are formed in the outer edge portion of the first divided body (71). The plurality of first fastening holes (73) penetrate the first divided body (71) in the axial direction and are arranged in the circumferential direction at an equal pitch. An annular first ring groove (74) is formed on the outer surface (the surface on the first side wall (26) side) of the first divided body (71). An annular first O-ring (17) is fitted inside the first ring groove (74).

    A first case-side annular recess (75) into which the elastic member (60) is fitted is formed on the inner side surface (the surface on the second side wall (36) side) of the first divided body (71). The first case-side annular recess (75) forms an annular or cylindrical space surrounding the first case-side communication hole (72). On the bottom surface of the first case-side annular concave portion (75), a first case-side annular convex portion (76) that protrudes toward the second side wall (36) is formed. A first case-side inclined surface (77) that is inclined along the first tapered portion (63) of the elastic member (60) is formed on the outer peripheral side of the first case-side annular convex portion (76).

    The second divided body (81) is a disk-shaped resin member having a second case side communication hole (82) formed in the axial center portion thereof. The second case side communication hole (82) is formed coaxially with the second communication hole (38) and the hole (52), and communicates with the second communication hole (38) and the hole (52).

    A plurality of second fastening holes (83) are formed in the outer edge portion of the second divided body (81). The plurality of second fastening holes (83) penetrate the second divided body (81) in the axial direction and are arranged in the circumferential direction at an equal pitch. An annular second ring groove (84) is formed on the outer surface (surface on the second side wall (36) side) of the second divided body (81). An annular second O-ring (18) is fitted inside the second ring groove (84).

    A second case-side annular recess (85) into which the elastic member (60) is fitted is formed on the inner side surface (the surface on the first side wall (26) side) of the second divided body (81). The second case side annular recess (85) forms an annular or cylindrical space surrounding the second case side communication hole (86). On the bottom surface of the second case-side annular concave portion (85), a second case-side annular convex portion (86) protruding toward the first side wall (26) side is formed. A second case-side inclined surface (87) that is inclined along the second tapered portion (64) of the elastic member (60) is formed on the outer peripheral side of the second case-side annular convex portion (86).

    The 1st communicating hole (28) of the 1st side wall (26) of the modification 2 does not have the 1st linear part (28b) of the said embodiment, but is comprised only by the 1st enlarged diameter part (28a). A first annular recess (43) into which the resin case (70) (strictly speaking, the first divided body (71)) is fitted is formed in the first side wall (26). On the other hand, the first annular protrusion (29) of the above embodiment is not formed on the first side wall (26).

    The 2nd communicating hole (38) of the 2nd side wall (36) of the modification 2 does not have the 2nd linear part (38b) of the said embodiment, but is comprised only by the 2nd enlarged diameter part (38a). A second annular recess (44) in which the resin case (70) (strictly speaking, the second divided body (81)) is fitted is formed in the second side wall (36). On the other hand, the 2nd annular convex part (39) of the above-mentioned embodiment is not formed in the 2nd side wall (36).

    In the work of assembling the discharge plate (50) of the second modification, the discharge plate (50) is sandwiched between the first divided body (71) and the second divided body (81). At this time, the elastic member (60) is fitted into the first annular recess (43) of the first divided body (71) and the second annular recess (44) of the second divided body (81). In this state, the bolts and nuts (88) are respectively inserted into the first fastening holes (73) and the second fastening holes (83) to connect the first divided body (71) and the second divided body (81). Let Thereby, the discharge plate unit (80) in which the discharge plate (50) and the resin case (70) are integrated can be configured. By performing the assembly work of the discharge plate unit (80) in parallel with other processes, the assembly efficiency can be improved.

    In the discharge plate unit (80), the protrusions (65, 66, 67, 68) of the elastic member (60) are in close contact with the resin case (70) to form a plurality of seal portions. Thereby, the water leak around an elastic member (60) can be prevented similarly to the said embodiment.

    Next, the first O-ring (17) is fitted in the first ring groove (74) of the discharge plate unit (80), and the second O-ring (18) is fitted in the second ring groove (84). Let The discharge plate (50) is sandwiched between the first side wall (26) of the first water tank (21) and the second side wall (36) of the second water tank (31). At this time, the resin case (70) is fitted into the first annular recess (43) and the second annular recess (44).

    Next, as in the above embodiment, the first water tank (21) and the second water tank (31) are connected to each other by bolts (15). As a result, the discharge plate unit (80) is held inside the tank unit (20). In this assembled state, the first O-ring (17) and the first side wall (26) come into contact with each other to form an annular seal portion, and the second O-ring (18) and the second side wall (36). And an annular seal portion is formed. Thereby, it is possible to reliably prevent water leakage around the resin case (70).

    In the second modification, the discharge plate unit (80) is configured by covering the discharge plate (50) with the resin case (70), whereby the shapes of the first side wall (26) and the second side wall (36) can be simplified. For this reason, in the 1st water tank (21), a 1st main-body part (21a) and a 1st side wall (26) can be easily integrally formed with a metal mold | die. Similarly, in the second water tank (31), the second main body portion (36) and the second side wall (36) can be easily integrally formed with a mold or the like. Thereby, reduction of manufacturing time thru | or manufacturing cost can be aimed at. Other functions and effects are the same as in the above embodiment.

<< Other Embodiments >>
In the above-described embodiment (including modifications), the following configuration may be adopted.

    You may use members other than a nut as a connection member which connects a 1st water tank (21) and a 2nd water tank (31). Specifically, for example, a claw portion is formed on one of the first side wall (26) and the second side wall (36), a convex portion is formed on the other side, and the claw portion is engaged with the convex portion, whereby the first water tank (21 ) And the second water tank (31) may be combined.

    Means other than the O-ring may be used as means for preventing water leakage between the first chamber (22) and the second chamber (32). For example, packing, a sealing material, an adhesive agent, etc. can be used.

    The size and type of the first water tank (21) and the second water tank (31) can be changed according to the application.

    The discharge device can be applied to devices other than the purified water generator. The discharge device can be applied to, for example, a water treatment device that purifies water or a humidifier.

    As described above, the present invention is useful for a discharge device.

21 1st water tank 21a 1st main-body part 22 1st chamber 26 1st side wall 28 1st communicating hole 31 2nd water tank 31a 1st main-body part 36 1st side wall 38 2nd communicating hole 41 Annular recessed part (recessed part)
50 Discharge plate 51 Discharge plate body 52 Hole 60 Elastic member 60a First side end surface 60b Second side end surface 61 Through hole 65, 67 Inner protrusion (protrusion)
66, 68 Intermediate protrusion (protrusion)
70 Resin case 90 Power supply 91 First electrode 94 Second electrode

Claims (7)

Power supply (90),
Two electrodes (91, 94) connected to the power source (90);
Side walls (26, 36) in which chambers (22, 32) for storing water conducting to each electrode (91, 94) and communication holes (28, 38) communicating with the chambers (22, 32) are formed. Two aquariums (21, 31) each having
A discharge plate (50) having a hole (52) for generating discharge,
The two water tanks (21, 31) sandwich the discharge plate (50) so that the two communication holes (28, 38) of the two side walls (26, 36) communicate with the hole (52). The discharge device is configured to be connected to each other. In claim 1,
The discharge plate (50)
A disc-shaped discharge plate body (51) in which the hole (52) is formed;
A disc-shaped elastic member (60) having a through hole (61) for holding the discharge plate body (51) inside and exposing the hole (52) of the discharge plate body (51) to the outside;
The two water tanks (21, 31) are configured to be connectable to each other with the two side walls (26, 36) sandwiching the elastic member (60). In claim 2,
An annular protrusion (65, 66, 67, 68) surrounding the through hole (61) is formed on at least one of the side end surfaces (60a, 60b) on both sides in the axial direction of the elastic member (60). A discharge unit characterized by that. In claim 3,
On the side end surfaces (60a, 60b) of the elastic member (60), the first annular protrusion (65, 66, 67, 68) and the first annular protrusion (65, 66, 67, 68) are provided. And a second annular protrusion (65, 66, 67, 68) that surrounds the discharge unit. In any one of Claims 2 thru | or 4,
Discharge characterized in that a recess (41) into which the elastic member (60) is fitted is formed in the side wall (26, 36) of at least one of the two water tanks (21, 31). apparatus. In claim 5,
The discharge device characterized in that the side wall (36) in which the recess (41) is formed is constituted by a separate member separable from the main body (31a) of the corresponding water tank (31). In any one of Claims 2 thru | or 4,
A resin case (70) having a shape along the outer shape of the elastic member (60);
The side walls (26, 36) of the respective water tanks (21, 31) are formed integrally with the main body (21a, 31a) of the corresponding water tank (21, 31),
The discharge device, wherein the resin case (70) is sandwiched between the two side walls (26, 36).

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