JP5978696B2 - Electric water heater for hand washing - Google Patents

Description

  The present invention relates to a hand-washing electric water heater that preheats water discharged from a faucet (water tap).

  As a conventional electric water heater for hand washing, a hot water tank having a water inlet and a discharge part, a heater for heating water in the hot water tank, a case and a cover surrounding the hot water tank, and a hot water tank protruding from the case There is a water supply port and a hot water outlet that respectively communicate with a water inlet and a discharger of a tank, and a water guide groove is provided in a fixing portion between the case and the cover (see, for example, Patent Document 1).

JP 2003-42567 A

  However, although it is possible to suppress water in a wide range such as a fixed surface of two members including a case and a cover of Patent Document 1, it is not possible to provide a groove in a deep portion.

  Further, although there is a means for suppressing water immersion by using another member such as a sealing material in the deeper details, there is a risk that the cost will be increased and the sealing effect may be reduced due to aging deterioration, resulting in water immersion.

  This invention is made in view of the said problem, and is providing the electric water heater for hand-washing which can suppress the flooding to the location which does not want to be flooded, without using a sealing material. .

The first problem-solving means of the present invention includes a housing, a heater provided in the housing for heating water to make hot water, a control board provided in the housing for controlling energization to the heater, A water guide path that is provided in the housing, receives water that has entered the housing through a gap between the housings, guides the water to the back surface of the housing, and discharges the water to the outside. The housing includes a cover having a design surface; and a mounted base plate, said water channel has a water guide channel ribs, a structure that is provided integrally with the base plate.

  Moreover, the 2nd problem-solving means of this invention is the structure where the said water conduit is inclined below toward the back surface of the said housing.

  Moreover, the 3rd problem-solving means of this invention is the structure where the said water conduit is the shape which the upper side opened.

The fourth means for solving problems of the present invention, prior Symbol water channel, said provided so as to open to the back of the base plate, which is configured to discharge the water entering into the back surface of the base plate.

  The electric water heater for hand-washing of the present invention controls the flow of water that has penetrated by providing a water conduit in the cover, thereby preventing water from being applied to locations that are not desired to be wet without using a sealing material. It becomes possible. Furthermore, since no sealing material is used, it is possible to reduce the cost and at the same time prevent the deterioration of the sealing effect due to aging.

  In the electric water heater for hand-washing of the present invention, since the water conduit is inclined downward toward the back of the cover, water can be guided from the water conduit to the back by gravity.

  In addition, the electric water heater for hand-washing of the present invention is easy to mold because the water conduit has a shape with an open upper side.

  In addition, according to the present invention, since the water that has entered from the water guide channel that opens to the back surface of the base plate is discharged to the back surface of the base plate, not the design surface, it is possible to discharge water that has entered without impairing the design.

It is explanatory drawing which installed the electric water heater for hand-washing under the washstand. It is internal explanatory drawing of the electric water heater for hand-washing. It is the perspective explanatory view which looked at the electric water heater for hand-washing from the left rear. It is the elements on larger scale which looked at the electric water heater for hand-washing which removed the cover from back. It is the elements on larger scale which looked at the electric water heater for the hand-washing which removed the cover from upper direction. It is an expansion perspective view of the tap opening part before a cover assembly | attachment. It is the principal part enlarged view of the AA cross section after the assembly | attachment of FIG. It is the elements on larger scale around the 3rd waterway of the electric water heater for hand-washing which removed the cover.

  Embodiments of the present invention will be described below in detail with reference to the drawings.

  FIG. 1 is an explanatory diagram in which an electric water heater 1 for hand washing according to the present invention is installed under a washstand 2. Water is pumped and introduced into the water inlet 5 of the hand-washing electric water heater 1 from the water supply 3 at the lower part of the wash basin 2 through the stop cock 4 by water pressure. The water is heated in the electric water heater 1 for hand washing to become hot water, and is sent from the tap 6 to the faucet 7 by tap pressure. A power cord 8 and a ground cord 8a are connected to the electric water heater 1 for washing hands. A power plug 8b with an earth leakage breaker is connected to the power cord 8 and the ground cord 8a. The power plug 8 b is connected to an outlet 9 at the lower part of the washstand 2 and supplies power to the hand-washing electric water heater 1 through the power cord 8. The ground cord 8a is connected to the ground terminal of the outlet 9 or a water pipe. Moreover, the electric water heater 1 for washing hands is covered with a resin cover 10 (housing) having a design surface 10a. The design surface 10a is a surface on which the user can visually recognize the electric water heater 1 for washing hands, and is a surface and a side peripheral surface when the electric water heater 1 for washing hands is attached.

  Furthermore, the wash basin 2 can be replaced by another water place such as a kitchen sink. In addition, when there is no outlet 9 in the lower part of the washstand 2, it is also possible to supply electric power to the electric water heater 1 for hand-washing from an outlet near a washstand using an extension cord.

  And based on the signal of the human body detection sensor (not shown) provided in the faucet 7, the control board 17 (refer FIG. 2) in the electric water heater 1 for hand-washing is the heat exchanger 15 (refer FIG. 2), etc. To work.

FIG. 2 is an explanatory diagram of the inside of the electric water heater 1 for washing hands. The cover 10 (see FIG. 3), the substrate case 20 (see FIG. 5), and the hand-washing electric water heater 1 in a state where the cover is removed include a resin base plate 11 (housing). In order to take water from the water supply 3 into the base plate 11, one end of the water inlet 5 is connected to the water supply 3, and one end of the flow valve 5 a is connected to the other end of the water inlet 5. One end of a water supply hose 12 is connected to the other end of the flow valve 5a, and one end of a flow rate detector 13 is connected to the other end of the water supply hose 12. One end of a water discharge hose 14 is connected to the other end of the flow rate detector 13, and one end of a heat exchanger 15 (heater) is connected to the other end of the water discharge hose 14. One end of a hot water outlet hose 16 is connected to the other end of the heat exchanger 15, and one end of the hot water outlet 6 is connected to the other end of the hot water outlet hose 16. Then, hot water is delivered from the tap hot water tap 6 toward the tap 7. A control board 17 is attached to the base plate 11 in a state where it is put in a board case 20 that detects the temperature of water flow or water stop and water or hot water and controls the energization of the heat exchanger 15. The control board 17 is provided with a power plug 8b that detects a 15 mA leakage through the power cord 8 and the ground cord 8a and turns off the power. Further, the flow valve 5a has a strainer hole 18 in which a strainer (not shown) for filtering foreign matter in the taken-in water is attached. The output of the heat exchanger 15 is 1240 W, the flow rate of water is 1000 cm ³ / min, and the adjustment temperature of hot water is 39.5 ° C. If necessary, it is possible to change the output of the heat exchanger 15, the flow rate of water, and the adjusted temperature of hot water.

  FIG. 3 is a perspective explanatory view of the electric water heater 1 for washing hands as seen from the left rear. The base plate 11 has an attachment surface 11a (rear surface) for attaching the electric water heater 1 for hand-washing to a wall or the like on the back. When attaching to the wall or the like, the attachment 11b is fixed to the wall, and the base plate is attached to the attachment 11b. 11 is attached to the mounting surface 11a. Further, the base plate 11 supports a flow valve 5a, a heat exchanger 15 and the like as shown in FIG. 2 on the side opposite to the mounting surface 11a. The cover 10 is attached to the base plate 11 so as to cover these members. When the cover 10 is attached to the base plate 11, a first gap 21 is generated on the mating surface around the cover 10, the base plate 11, and the water inlet 5. The base plate 11 includes a first water conduit 22 that is provided below the first gap 21 and opens on the back surface of the base plate 11. Moreover, the 2nd clearance gap 23 arises in the mating surface of the cover 10 and the baseplate 11 around the hot water outlet 6. The base plate 11 includes a second water conduit 24 that is provided below the second gap 23 and opens on the back surface of the base plate 11. A third gap 25 is formed on the mating surface of the cover 10 and the base plate 11 around the strainer hole 18. The base plate 11 includes a third water conduit 26 that is provided in the lower direction of the third gap 25 and opens on the back surface of the base plate 11.

  FIG. 4 is a partially enlarged view of the hand-washing electric water heater 1 with the cover 10 removed as viewed from the rear. The first water conduit 22 is opened one by one on the left and right sides of the back surface of the base plate 11 in the downward direction of the water inlet 5. The first water conduit 22 has a first water conduit bottom surface 22a inclined downward from the front to the rear as shown in FIG. 3, and a first water conduit 22 projecting upward from the first water conduit bottom surface 22a. 1 water conduit rib 22b. The second water conduit 24 is opened one by one on the right and left sides of the bottom of the tap 6 on the back surface of the base plate 11. The second water conduit 24 has a second water conduit bottom surface 24a inclined downward from the front to the back as shown in FIG. 3, and a second water conduit 24 projecting upward from the second water conduit bottom surface 24a. 2 water conduit ribs 24b.

  FIG. 5 is a partially enlarged view of the hand-washing electric water heater 1 with the cover 10 removed as viewed from above. The first water conduit 22 is provided on the upper surface of the base plate 11 so as to open one by one on the left and right in the rearward direction of the water inlet 5, and has a first water conduit rib 22 b at the forefront of the first water conduit 22, In this structure, the water that has entered the first water guide path 22 from the first gap 21 can be discharged to the back surface of the base plate 11. The second water conduit 24 is provided on the base plate 11 so as to open one by one on the left and right in the rearward direction of the tap 6, and has a second water conduit rib 24 b at the foremost portion of the second water conduit 24. In this structure, the water that has entered the second water conduit 24 from the second gap 23 can be discharged to the back surface of the base plate 11.

  FIG. 6 is an enlarged perspective view of the outlet 6 before the cover 10 is assembled to the base plate 11. On the upper surface of the base plate 11 where the hot water outlet 6 is provided, the base plate side design surface 30a is provided at a position higher than the fitting portion 11c with the cover 10, and the second water conduit 24 is provided in the left-right direction. Convex portions 30 are formed. The base plate-side design surface 30 a of the protrusion 30 has an extension 30 b that extends in the left-right direction, which is shorter than the width of the opening of the second water conduit bottom surface 24 a of the second water conduit 24. A gap is provided between the end surface 11d forming the second water conduit 24 of the fitting portion 11c with the cover 10 and the end surface of the extension portion 30b. The opening of the second water conduit 24 and the space of the second water conduit 24 are the second water conduit bottom surface 24a, the end surface 11d forming the second water conduit 24, and the convex portion 30a having the extension 30b. Is formed by.

  The tap 6 is substantially flush with the design surface 30 a of the convex portion 30 a and is provided with a tap design portion 6 a extending in the circumferential direction of the tap 6. Furthermore, the tap 6 is a second conduit for the second conduit 24 via a seal member (not shown) that covers the tap waist 6b that is smaller in diameter than the tap design portion 6a and that is provided below. The rib 24b and a part of the convex portion 30a are in contact with each other.

  Further, the cover 10 has a peripheral edge portion 10e in contact with the peripheral end portion of the tap opening design portion 6a, and a straight edge portion 10f extending from both ends of the semicircular portion of the peripheral edge portion 10e toward the end portion of the cover 10. Is provided. Further, the peripheral edge portion 10e and the edge portion 10f of the cover 10 are provided along the peripheral edge portion 10e and the edge portion 10f provided so as to be positioned below the outlet design portion 6a (the peripheral edge portion 10e and the edge portion 10f). A cover water conduit 10g extending inside the groove portion formed by (1) is provided. The distance between the ends of the cover conduit 10g provided on the edge 10f is set to be shorter than the diameter of the tap outlet design portion 6a and longer than the diameter of the tap outlet waist portion 6b. The width of is also set. The cover water conduit 10g is inclined downward from the peripheral edge 10e toward the cover end. The cover conduit 10g at the edge portion 10f is formed with a tapered portion 10h so that the linear distance between the end surfaces of both cover conduits 10g facing each other toward the end of the cover 10 is increased.

  The extension part 30b of the convex part 30 provided in the base plate 11 is formed so that the thickness increases from the part in contact with the tap outlet design part 6a toward the mounting surface 11a of the base plate 11. For this reason, the extension portion 30b is provided with an inclination, and the cover conduit 10g is provided with the tapered portion 10h. Therefore, the cover 10 is removed from the inclination of the cover conduit 10g and the second conduit 24 from the base plate. 11 is easy to assemble. In addition, when assembled, the second gap 23 is formed between the outlet design portion 6 a, the peripheral edge portion 10 e and the edge portion 10 f of the cover 10, and the left and right end surfaces of the extended portion 30 b of the convex portion 30.

  FIG. 7 is an enlarged view of an essential part of the AA cross-section after assembly of FIG. When the cover 10 is assembled to the base plate 11, the surface of the cover conduit 10 g is superposed on the surface facing the outlet design portion 6 a and the extended portion 30 b of the convex portion 30 of the base plate 11, and is on the end side of the cover 10. A part thereof is overlapped with the second water conduit bottom surface 24 a of the second water conduit 24. The periphery of the second water guide rib 24b shown in FIG. 6 and the cover water guide passage 10g and the hot water outlet 6 are sealed by a seal member provided in the hot water outlet waist 6b.

  The configurations of FIGS. 6 and 7 are the same for the water supply port 5.

  FIG. 8 is a partially enlarged view of the vicinity of the third water conduit 26 of the electric water heater 1 for washing hands with the cover 10 removed. The third water conduit 26 is provided in the downward direction of the third gap 25 inside the base plate 11. The third water conduit 26 has a third water conduit bottom surface 26a inclined downward from the front to the rear, and a third water conduit rib 26b extending from the third water conduit bottom surface 26a in the upper right direction. . The third water conduit 26 is provided so as to be connected to a discharge port 26 c that is open on the back surface of the base plate 11, and water that has entered the third water conduit 26 from the third gap 25 is discharged from the discharge port 26 c to the back surface of the base plate 11. It is a possible structure. Moreover, the 3rd water conduit rib 26b is provided in the inner side end surface (front surface side end surface) of the base plate 11 of the 3rd water conduit 26, and it suppresses that water falls on the opposite side to an inclination.

  The operation of the embodiment of the present invention will be described. For example, when the electric water heater 1 for hand washing is cleaned, when water leaks from a place such as the wash basin 2 or the water tap 3, when the electric water heater 1 for hand washing has condensed, the cover 10 may get wet. When the cover 10 is submerged, water may enter the cover 10 from the first gap 21, the second gap 23, and the third gap 25. The water that has entered through the first gap 21 drops into a cover conduit (not shown) and is discharged to the back surface of the base plate 11 along with the inclination of the cover conduit. Moreover, it dripped at the 1st water conduit bottom 22a from a cover water conduit. The water dropped on the first water conduit bottom surface 22a is prevented from flowing into the cover 10 by the first water conduit rib 22b, and is discharged to the back surface of the base plate 11 along with the inclination of the first water conduit bottom surface 22a. The The water that has entered from the second gap 23 drops into the cover conduit 10g and is discharged to the back surface of the base plate 11 along with the inclination of the cover conduit 10g. Moreover, the water dripped from the cover conduit 10g to the second conduit bottom surface 24a is prevented from flowing into the cover 10 by the second conduit rib 24b, and the second conduit conduit bottom 24a is inclined. It is discharged to the back surface of the base plate 11. The water that has entered the third water conduit 26 from the third gap 25 drops on the third water conduit bottom surface 26a. The water dripped onto the third water conduit bottom surface 26a is prevented from flowing into the cover 10 by the third water conduit rib 26b, and is discharged to the back surface of the base plate 11 along with the inclination of the third water conduit bottom surface 26a. The

  The effect of the embodiment of the present invention will be described. The first water guide path 22, the second water guide path 24, and the third water guide path 26 are provided in the base plate 11, and the first gap 21, the second gap 23, and the third gap 25 are provided. By controlling the flow of water that has entered through, it is possible to suppress water exposure to locations that are not desired to be watered, such as the flow rate detector 13, the heat exchanger 15, and the control board 17, without using a sealing material. It becomes. Furthermore, since the first water conduit 22, the second water conduit 24, and the third water conduit 26 are provided integrally with the base plate 11 and do not use a sealing material, the cost is reduced and seals due to aging are simultaneously provided. The possibility of a decrease in the effect can also be prevented.

  Since the first water conduit 22, the second water conduit 24, and the third water conduit 26 are inclined downward toward the back surface of the base plate 11, the first water conduit 22 and the second water conduit are separated by gravity. Water can be guided to the back surface of the base plate 11 from the water conduit 24 and the third water conduit 26.

  Since the 1st water conduit 22, the 2nd water conduit 24, and the 3rd water conduit 26 are the shapes which the upper side opened, shaping | molding is easy.

  Since water is discharged to the back surface of the base plate 11 (attachment surface 11a for attaching the electric water heater 1 for hand-washing to a wall or the like), the state in which water is discharged at the time of installation or dirt such as scale is not visible from the cover 10 side. Suppress discomfort to the person.

  The water that has entered the first water conduit 22, the second water conduit 24, and the third water conduit 26 is the first water conduit rib 22b, the second water conduit rib 24b, and the third water conduit protruding upward. Inflow to the inside of the cover 10 is blocked by the water channel ribs 26 b and discharged to the back surface of the base plate 11.

  Since the base plate 11 is made of resin, even if water that has entered from the cover 10 is discharged to the back surface of the base plate 11, the occurrence of rust and the like can be suppressed.

  Since the cover water conduit 10g of the cover 10 and the second water conduit 24a (first water conduit 22a) are polymerized, it is possible to further suppress the intrusion of water into the housing.

  In addition, this invention is not limited to the said embodiment, You may change into the aspect shown below.

The first water conduit 22 and the second water conduit 24 are provided on the upper surface of the base plate 11 two by two, but the first water conduits 22 and the second water conduits 24 are two. May be communicated.

-Although the 3rd water conduit 26 is the shape which the upper side and the front side opened, you may provide a rib in the front side.

1 Electric water heater for hand washing 10 Cover (housing)
11 Base plate (housing)
15 Heat exchanger (heater)
17 control board 20 board case 22 first water conduit (water conduit)
24 Second waterway (waterway)
26 3rd waterway (waterway)

Claims (4)

A housing;
A heater provided in the housing to heat the water into hot water;
A control board provided in the housing for controlling energization to the heater;
A water conduit that is provided in the housing, receives water that has entered the housing through a gap between the housings, and discharges the water from the back surface of the housing to the outside .
The housing includes a cover having a design surface and a base plate to which the cover is attached,
The water guide passage has a water conduit ribs, electric water heater for handwashing that provided integrally with the base plate. The electric water heater for hand washing according to claim 1, wherein the water conduit is inclined downward toward the back surface of the housing. The electric water heater for hand-washing according to claim 1 or 2, wherein the water conduit has a shape in which an upper side is opened. Prior Symbol water conduit, said back is provided so as to open to the base plate, the water entering the hand-washing electric water as claimed in any one of claims 3 to discharge to the back of the base plate vessel.

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