JP5531397B2 - Local cleaning equipment - Google Patents

Description

  The present invention relates to a local cleaning apparatus having a hot water tank for storing hot water for local cleaning.

  Conventionally, a hot water tank having a wall that forms a hot water chamber for storing hot water for local washing and a water inlet that communicates with the hot water chamber and enters the hot water chamber, and a hot water tank that is attached to the hot water tank inlet and has a water inlet in the hot water chamber. There is provided a local cleaning device including a water supply tool for supplying water, a cleaning nozzle that sprays hot water in a hot water tank toward a local part of a living body, and a housing in which the hot water tank and the cleaning nozzle are mounted.

  In this type of local cleaning device, as Patent Document 1, there is provided a relief valve that discharges relief water from the hot water chamber to the upper surface opening side of the toilet when the internal pressure of the hot water tank exceeds the set value. What is known. Thereby, the pressure of the hot water for washing in the hot water tank is prevented from becoming too high. Here, the relief valve is separate from the water supply device attached to the hot water tank in order to supply water to the hot water tank, and is installed at different locations in the housing.

Moreover, as patent document 2, what is provided with the relief valve which discharges relief water from the warm water chamber to the upper surface opening side of a toilet bowl when the internal pressure of a warm water tank becomes more than a preset value is known (patent document). 2). According to this, the drainage channel extended from the relief valve is open to the atmosphere.
JP-A-10-159156 JP 2001-98618 A

  According to the above-described hot water tank, the relief valve is separated from the water supply tool attached to the hot water tank in order to supply water to the hot water tank. Therefore, the relief valve and the water supply tool are installed in different places in the housing, and installation space is required.

  The present invention has been made in view of the above-described circumstances, and the plug water supply pipe, the water supply pipe, and the relief valve constituting the water supply tool can be collectively installed in the housing of the local cleaning device. It is an object of the present invention to provide a local cleaning device capable of reducing an installation space required for installing a pipe, a water supply pipe, and a relief valve.

A local cleaning apparatus according to the present invention is attached to a hot water tank having a wall portion that forms a hot water chamber for storing hot water for local cleaning and a water inlet that communicates with the hot water chamber and enters the hot water chamber, and an inlet of the hot water tank. A water supply device for supplying water to the hot water chamber through the water inlet,
A cleaning nozzle that sprays the hot water in the hot water tank toward a local part of the living body, and a housing that has the base plate that mounts the hot water tank and the cleaning nozzle and forms a drain outlet communicating with the upper surface opening of the toilet. A water supply pipe that protrudes in the direction of 1 and is inserted and fitted into the water inlet of the hot water tank, and a water supply pipe that is connected to the water supply pipe so as to protrude in the second direction and is connected to the water supply system. When the pressure of the hot water chamber protrudes in the third direction so as to be connected to the plug-in water supply pipe and the water supply water pipe and the pressure of the hot water chamber rises above a predetermined value, the water in the hot water chamber is used as relief water in the drain port of the base plate of the housing and a relief valve having a discharge nozzle with a discharge port for discharging the water supply device may have a snap engagement portion for snap engaging the engaged portion formed on the hot water tank Characterized in that that.
The water supply device has an engaging portion that snap-engages with an engaged portion formed in the hot water tank. In this case, since the snap engaging portion of the water supply device snap-engages with the engaged portion of the hot water tank, the water supply device can be attached to the base plate of the housing in a screw-less manner, and the assembly workability is good.

  The water supply device has an insertion water supply pipe projecting in the first direction, a water supply pipe projecting in the second direction, and a relief valve having a discharge nozzle projecting in the third direction. When a water supply plug is inserted into the hot water tank inlet and equipped, the water supply pipe and relief valve for connecting to the water supply system such as a water pipe are automatically attached to the housing of the local cleaning device. Installed. Therefore, it is not necessary to equip the wall portion of the hot water tank with the water supply pipe and the relief valve one by one, and assemblability is ensured.

According to the present invention, the following form can be adopted. Preferably, the passage of the plug-in water supply pipe, the passage of the water supply pipe, and the relief port of the relief valve that constitute the water supply device are communicated with each other in the water supply device (Claim 2). In this case, even if the tap water becomes excessively high due to circumstances, the high pressure is discharged from the relief valve. Therefore, the excessive high pressure of tap water may excessively affect the hot water chamber of the hot water tank. Reduced. Even if the hot water chamber of the hot water tank becomes excessively high in pressure, the high pressure is discharged from the relief valve, so that the high pressure in the hot water chamber is reduced from excessively affecting the water system.
This is derived from the structure in which the three of the water supply pipe passage, the water supply water pipe passage, and the relief valve relief port are in communication with each other .

Preferably, the water supply device has a jig engaging portion for detachably attaching a leak test jig for performing a leak test by closing the discharge port of the discharge nozzle to the water supply device (claim 3 ). The leak test jig can be detachably attached to the jig engaging portion of the water supply tool at the time of inspection at the time of assembly, at the time of inspection after assembly, inspection before shipment, inspection after shipment, and the like. The leak test jig closes the discharge port of the discharge nozzle in an airtight or liquid-tight manner, and prevents pressure from escaping from the discharge port of the discharge nozzle. In this case, a leak test (leak test) for the water supply alone or a leak test (leak test) for the hot water tank to which the water supply is attached can be performed.

Preferably, the drainage port formed in the base plate of the housing is surrounded by a water spraying suppression roof wall having a roof shape that suppresses water spraying. Preferably, an arrangement space in which a leak test jig for closing the discharge port of the discharge nozzle is detachably disposed is formed between the tip of the discharge nozzle of the water supply tool and the water spray suppressing roof wall. Item 4 ). The drainage port formed in the base plate of the housing is surrounded by a water spraying suppression roof wall that forms a roof shape that suppresses water spraying. For this reason, when the hot water tank is used, when the internal pressure of the hot water tank becomes excessively high and the discharge nozzle of the relief valve opens and the relief water is discharged from the discharge port of the discharge nozzle, the relief water is drained. Sprinkling around the mouth is suppressed by the water-reducing roof wall. In this case, it is suppressed that relief water sprinkles near the drain outlet formed in the base plate. Therefore, the protection of the electronic components in the housing can be improved. Preferably, the discharge nozzles of the relief valve of the water supply device, while downward slope as this center line is directed at the tip of the discharge nozzle is oriented so as to face the discharge port of the base plate of the housing (claim 5) . In this case, since the discharge nozzle of the relief valve is inclined downward toward the tip of the relief valve, the drainage from the discharge nozzle discharge port of the relief valve is good, and the relief water is discharged from the discharge nozzle discharge port to the base plate. Good drainage at the drain.

Preferably, the water-suppressing roof wall formed on the base plate has a descending inclined wall having a mountain shape that is a cross-section in a direction perpendicular to the center line of the discharge nozzle of the relief valve, and the center is high and slopes downward toward both ends. It has the part which makes reverse V shape (Claim 6 ). In this case, when the relief water discharged from the discharge port of the discharge nozzle of the relief valve is discharged to the drain port of the base plate, the spraying of the relief water is suppressed.

Preferably, the drain port formed in the base plate has at least a V-shaped portion in which the opening width of the drain port becomes smaller toward the destination from which the relief water is discharged from the discharge port of the discharge nozzle of the relief valve ( Claim 7) . More preferably, the water spray suppression roof wall has an inverted V shape (a shape inverted upside down) in the direction in which the relief water is discharged, and the inner surface of the water spray suppression roof wall is the discharge nozzle of the relief valve. In a cross section along the center line, it extends continuously in an arc toward the drain outlet (claim 8). In this case, when the relief water discharged from the discharge port of the discharge nozzle of the relief valve is discharged to the drain port of the base plate, even if the relief water hits the inner surface of the water spraying suppression roof wall, Etc.) and the drainage of the relief water discharged to the drain outlet is improved. Preferably, the water supply pipe and the relief valve constituting the water supply device form a branch portion that branches into a V shape. In this case, when the water supply pipe of the water supply device is inserted and fitted into the water inlet of the hot water tank, the branch portion is face-to-face engaged with the protrusion of the base plate of the housing, and the difference of the water supply from the water inlet is It is preferable that the drop-in of the water supply pipe is suppressed (claim 9). In this case, even when the internal pressure of the hot water chamber becomes excessive, the branch portion of the water supply device is in face-to-face engagement with the protrusion of the base plate of the housing. It is possible to suppress the pipe from falling off.

  As described above, according to the present invention, the plug water supply pipe, the water supply pipe and the relief valve constituting the water supply device are collectively installed in the housing, and the installation space is reduced in the housing of the local cleaning device. This is advantageous for improving assembly and reducing the number of parts.

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

(Embodiment 1)
Embodiment 1 of the present invention will be described with reference to FIGS. FIG. 1 shows a plan view of a hot water tank apparatus 1 for storing hot water for local cleaning mounted in a housing of the local cleaning apparatus. FIG. 2 shows a side view of the hot water tank apparatus 1. As shown in FIG. 2, the resin hot water tank 2 constituting the hot water tank apparatus 1 includes a lower tank 21 as a first divided tank having a lower flange 22 and a second divided tank having an upper flange 24. The lower tank 21 and the upper tank 23 are integrally assembled with the lower flange 22 and the upper flange 24 facing each other. The lower tank 21 has a plurality of installation flanges 2y installed on the housing of the local cleaning device. FIG. 3 schematically shows the concept of the conceptual structure of the lower tank 21 of the hot water tank 2. The lower tank 21 of the hot water tank 2 forms a lower portion of the hot water chamber 25 that stores hot water for local washing, and a bottom wall portion 26 that forms the bottom surface of the hot water chamber 25, and a part of the bottom wall portion 26. And a recessed portion 27 recessed downward.

  As shown in FIG. 3, the lower tank 21 of the hot water tank 2 has a container shape whose upper surface is open. A first side wall 21 a is formed on one end side of the lower tank 21 in the longitudinal direction (arrow L direction). On the other end side in the longitudinal direction of the lower tank 21, a second side wall portion 21b is formed so as to face the first side wall portion 21a. The lower tank 21 is formed with a first extending wall portion 21c and a second extending wall portion 21d extending along the longitudinal direction (arrow L direction) so as to face each other. The heater 3 is disposed along the horizontal direction in the hot water chamber 25, and has a heating portion 30 having a long shape facing the water in the hot water chamber 25. The heating unit 30 has a round bar shape with a round cross section extending linearly along the first extending wall portion 21c along the longitudinal direction (arrow L direction). But it ’s okay. The heater 3 is disposed close to the wall portion so as not to contact the wall portion constituting the hot water tank 2. In addition, when the heater 3 contacts the hot water tank 2, since there exists a possibility that the hot water tank 2 may be thermally damaged, it is preferable to avoid.

  As shown in FIG. 3, the first side wall 21 a of the hot water tank 2 includes a heater insertion port 21 h having a circular cross section for inserting the heating unit 30 of the heater 3 into the hot water chamber 25 from the direction of the arrow A <b> 1, and the temperature sensor 4. Is inserted into the hot water chamber 25 from the direction of the arrow A2, and a water inlet 21i having a circular cross section for inserting the water supply device 5 from the direction of the arrow A3. The second side wall portion 21 b facing the first side wall portion 21 a has a bulging portion 21 k that bulges into the hot water chamber 25. The bulging portion 21k has a heater receiving port 21r having a circular cross section at a position facing the heater insertion port 21h.

  When the hot water tank device 1 is assembled, the heating unit 30 of the heater 3 is inserted from the first side wall 21a side into the heater insertion port 21h toward the hot water chamber 25 from the direction of the arrow A1 and the tip 3f of the heater 3 is inserted. Insert into the heater socket 21r. Accordingly, the heating unit 30 of the heater 3 is installed in a substantially horizontal state in the hot water chamber 25 while approaching the bottom wall portion 26 of the hot water tank 2 in a non-contact manner. In addition, since the heating part 30 is constructed along the longitudinal direction (arrow L direction) of the hot water tank 2, the heat radiation length and heat radiation area of the heating part 30 are ensured, and the water in the hot water chamber 25 can be efficiently heated. . In addition, the heater insertion port 21h and the heater receiving port 21r are sealed, and the leakage of water from the heater insertion port 21h and the heater receiving port 21r of the hot water tank 2 is suppressed.

  Here, as can be understood from FIG. 3, the heater 3, the temperature sensor 4, and the water supply device 5 are heated from a common direction (arrow LW direction) with respect to the hot water tank 2, that is, from the first side wall 21 a side. It is attached to the first side wall portion 21 a of the tank 2. That is, in the hot water tank 2, the water inlet 22i serving as the inlet of the water inlet passage 66 is formed on the same side as the side where the heater inlet 21h and the sensor outlet 21s are formed. As a result, the electric wiring 3x connected to the heater 3, the electric wiring 4x connected to the temperature sensor 4, the water supply tool 5 and the water supply pipe 5x connected to the water inlet 21i are assembled from a common direction (arrow LW direction). It is possible to improve the assembly workability. Further, in the local cleaning device, the main body of the local cleaning device is disposed on the start end side in the arrow LW direction. For this reason, when assembling the electric wiring 3x from the main body portion to the heater 3, the electric wiring 4x from the main body portion to the temperature sensor 4, and the water supply pipe 5x from the main body portion, the assembling work is simplified. In addition, it is advantageous to shorten the wiring distance of each of the electric wirings 3x and 4x and the piping distance of the water supply pipe 5x as much as possible, thereby contributing to downsizing of the local cleaning device.

  Further explanation will be added. The temperature sensor 4 includes a cylindrical body 40 made of a metal having good thermal conductivity such as copper, aluminum, a copper alloy, an aluminum alloy, and the like, and a sensor unit 41 held inside the distal end portion of the cylindrical body 40. . The cylinder 40 of the temperature sensor 4 has a sensor flange 42 having a bowl shape along the direction perpendicular to the axis thereof. The sensor flange 42 is also made of a metal having good heat conductivity. A ring-shaped seal portion 43 formed of a seal material is attached to the sensor flange 42. The seal portion 43 makes one round around the cylindrical body 40. Although the temperature sensor 4 has a rod shape and is inserted into the hot water chamber 25 side together with the seal portion 43 from the sensor insertion port 21s, the sensor base end portion 44 of the temperature sensor 4 that is further away from the hot water chamber 25 than the sensor flange 42 is Without being inserted into the hot water chamber 25, the hot water tank 2 is exposed outward from the first side wall portion 21 a. Note that the temperature sensor 4 runs parallel to the heating unit 30 in parallel with the heating unit 30 obliquely above the heating unit 30 while approaching the heating unit 30 of the heater 3.

  The heating unit 30 of the heater 3 includes a long cylindrical body 31 formed of a metal having good thermal conductivity such as copper, aluminum, a copper alloy, an aluminum alloy, and the like. And a heat generating portion embedded along the length direction. Since the heat generating part is extended along the length direction of the heating part 30, the heating length of the heating part 30 is long. As shown in FIG. 3, the heater base end portion 32 of the cylindrical body 31 constituting the heater 3 has a heater flange 33 (outdoor heat transfer member) having a bowl shape along the direction perpendicular to the axis thereof. The heater flange 33 is also formed of a heat conductive material having better heat conductivity and strength than a resin material such as metal such as copper, aluminum, copper alloy, and aluminum alloy, and is the same as the cylinder 31 of the heater 3. It can be made of materials or similar materials.

  As shown in FIG. 3, a heater base end portion 32 is provided on the heater 3 on the side farther from the hot water chamber 25 than the heater flange 33. When the heater 3 is attached to the hot water tank 2, the heater base end portion 32 is not inserted into the hot water chamber 25 and is exposed to the outside together with the heater flange 33 from the first side wall portion 21 a of the hot water tank 2. Further, for the temperature sensor 4, a sensor base end portion 44 of the tubular body 40 of the temperature sensor 4 is provided. The heater flange 33 includes a U-shaped fitting groove 33a (fitting recess) into which the sensor base end portion 44 of the temperature sensor 4 is fitted, a penetrating positioning hole 33b (positioning portion), and a penetrating mounting hole 33c (mounting). Part).

  When the heater 3 is inserted into the heater insertion port 21h and the temperature sensor 4 is inserted into the sensor insertion port 21s and attached to the first side wall portion 21a of the hot water tank 2, the positioning projection 21p of the first side wall portion 21a The positioning hole 33b (positioning engaged portion) of the heater flange 33 is fitted into the (positioning engaging portion) (see FIG. 7). Thereby, the heater 3 is positioned in the circumferential direction thereof. Further, as can be understood from FIG. 3, the fixture 34 (attachment screw) is inserted into the attachment hole 33c of the heater flange 33, and is further screwed into the assembly hole 21r of the first side wall portion 21a. Thus, the heater 3 is attached to the first side wall portion 21a of the hot water tank 2. At this time, as can be understood from FIG. 7, the fitting flange 33 a of the heater flange 33 and the sensor base end portion 44 of the temperature sensor 4 are fitted so as to be in contact with each other so that heat can be transferred, and the heater flange 33 is shaped like a bowl. The temperature sensor 4 is also assembled to the first side wall portion 21a of the hot water tank 2 in order to press the heater flange 33 toward the hot water chamber 25 so as to come into contact with the sensor flange 42 so that heat can be transferred. That is, the heater 3 and the sensor 4 are fastened together by the heater flange 33. In this case, since the structure in which the heater flange 33 hits the sensor flange 42 is employed, it is possible to suppress the temperature sensor 4 inserted into the sensor insertion port 21s from being released outward.

  In addition, according to the present embodiment, since the heater flange 33 is in heat transfer contact with the sensor flange 42 of the temperature sensor 4, the heat of the heating unit 30 of the heater 3 is transmitted through the sensor flange 42 to the sensor unit of the temperature sensor 4. Heat can be transferred to 41. In FIG. 7, R1 indicates a heat transfer imaginary line that virtually connects the heater 3 and the temperature sensor 4 at the shortest distance. In this case, since the metal material constituting the heater flange 33 is provided on the heat transfer virtual line R1 that virtually connects the temperature sensor 4 and the heating unit 30 of the heater 3 with the shortest distance, the heater flange 33 is Thus, an outdoor heat transfer path can be formed. Thereby, the heat of the heating part 30 of the heater 3 can be quickly transmitted to the sensor part 41 of the temperature sensor 4 via the heat transfer virtual line R1 that forms the outdoor heat transfer path in the heater flange 33.

  As described above, the water supply tool 5 is inserted into the water inlet 21i of the first side wall portion 21a of the hot water tank 2 from the direction of the arrow A3. As shown in FIG. 3, the water supply tool 5 includes a plug-in water supply pipe 51 having a hollow tubular shape that is inserted into the water inlet 21i, a water supply pipe 52 having a hollow tubular shape that communicates with a water supply system through a water supply pipe 5x, and a water discharge pipe. It has the relief valve 54 which has the exit 53 at the front-end | tip. When the internal pressure of the hot water chamber 25 increases excessively, the relief valve 54 automatically opens in response to the pressure, and discharges the water in the hot water tank 2 from the discharge port 53 in the direction of the arrow M1 as relief water. . Here, in the water supply tool 5, the insertion water supply pipe 51, the water supply pipe 52, and the relief valve 54 are branched in three directions. A ring-shaped seal portion 55 is attached to the outer peripheral portion of the insertion water supply pipe 51.

  At the time of assembly, as can be understood from FIG. 3, the insertion water supply pipe 51 of the water supply tool 5 is inserted into the water inlet 21i of the first side wall portion 21a from the direction of the arrow A3. Thereby, the water supply tool 5 is attached to the 1st side wall part 21a of the warm water tank 2 so that attachment or detachment is possible. Since the seal portion 55 formed of the sealing material of the insertion water supply pipe 51 exhibits elasticity, the insertion water supply pipe 51 is press-fitted into the water inlet 21i so that the water in the hot water chamber 25 does not leak outward. Sealability is ensured. As can be understood from FIG. 3, the partition member 6 as a water flow portion is detachably attached to the bottom wall portion 26 of the hot water tank 2. Specifically, as shown in FIG. 8, a plurality of engaging protrusions 26p that form a wall shape upward from the bottom wall portion 26 are formed in a rail shape. The partition member 6 has a plurality of engaged protrusions 6p that form a wall shape. The engaged protrusion 6 p of the partition member 6 is fitted into the engaging protrusion 26 p of the bottom wall portion 26. Thereby, the partition member 6 is detachably attached to the bottom wall portion 26.

  As described above, the partition member 6 is attached to the bottom wall portion 26 of the hot water tank 2 in order to partition the water inlet passage 66 and the descending passage 67 from the hot water chamber 25. Accordingly, the partition member 6 includes a water inlet passage 66 that communicates with the water inlet 21i of the hot water chamber 25 so that hot water is supplied, and water that descends from the water inlet passage 66 toward the recess 27 and flows through the water inlet passage 66. And a descending passage 67 that flows into the recess 27. Since the descending passage 67 is formed, the water inlet passage 66 is lifted from the height position of the concave portion 27 so as to be adapted to the height position of the heating unit 30 of the heater 3 (see FIG. 6).

  As shown in FIG. 3, the partition member 6 is formed of resin, metal, or ceramics, and includes a first partition wall portion 61 that partitions the water inlet passage 66 from the hot water chamber 25, and a recess formed from the first partition wall portion 61. 27, a second partition wall portion 62 that is continuously provided so as to be inclined downward toward 27, and a third partition wall portion 63 that is continuously provided to the second partition wall portion 62. The first partition wall portion 61 extends straight along the heating unit 30 of the heater 3. The second partition wall portion 62 is formed so as to descend toward the recess 27, and partitions the descending passage 67 from the hot water chamber 25. The third partition wall portion 63 covers the recess 27 from above and has a group of pores including a plurality of pores 64 that allow the recess 27 and the hot water chamber 25 to communicate with each other.

  According to this embodiment, as shown in FIG. 3, the partition member 6 has a plurality of concave mounting holes 6a (first engaging portions). In particular, the tongue piece 61a extended from the first partition wall portion 61 is placed on the second bottom wall portion 26, and has a mounting hole 6a. On the bottom wall portion 26 of the hot water tank 2, a plurality of convex protrusions 2a (second engagement portions) protruding upward are formed at positions facing the attachment holes 6a. With the partition member 6 disposed above the bottom wall portion 26, each mounting hole 6a is fitted and engaged with each projection 2a. Thereby, the partition member 6 is detachably attached to the bottom wall portion 26 while being positioned. Thus, when the partition member 6 is attached to the bottom wall portion 26 so as to cover the concave portion 27 from the upper side, as shown in FIG. 3, the heating unit 30 of the heater 3 is connected to the third partition wall portion 63 of the partition member 6. The upper part is disposed so as to approach the third partition wall portion 63. For this reason, even when the turbulent flow of the water in the hot water chamber 25 is severe, the third partition wall portion 63 of the partition member 6 interferes with the heating unit 30 of the heater 3, so that the position of the partition member 6 Deviation or dropout is suppressed by the heating unit 30 of the heater 3. The mounting hole 6a is concave and the protrusion 2a is convex. However, the present invention is not limited to this, and the concave / convex relationship may be reversed. Thus, the partition member 6 is attached and assembled to the bottom wall portion 26 of the hot water tank 2 by fitting and engaging the mounting holes 6a with the projections 2a. Thus, the assembly of the partition member 6 to the bottom wall portion 26 is a screw-less system that does not use an attachment screw, and the assembly workability is simplified.

  According to the present embodiment, the partition member 6 serving as the water passage portion described above includes the water inlet passage 66 that communicates with the water inlet 21i of the hot water chamber 25 so that hot water is supplied, and the concave portion 27 extending from the water inlet passage 66. And a descending passage 67 for flowing water flowing through the water inlet passage 66 to the recess 27. Here, according to the present embodiment, as shown in FIGS. 4 and 8, in the vertical direction H, the height position H4 of the center C4 of the cross section of the water inlet passage 66 is the lower end 30d of the heating unit 30 of the heater 3. ΔH (see FIG. 4 and FIG. 8) is set above the height position H1. Here, the center C4 of the cross section of the water inlet passage 66 means the center in the cross-sectional area cut in the direction orthogonal to the length direction of the water inlet passage 66. In addition, as (DELTA) H, although it changes also with kinds and sizes of the hot water tank 2, it exists in the range of 0.1-20 millimeters, the range of 0.2-10 millimeters, the range of 0.3-5 millimeters, for example. Can be set as appropriate. However, it is not limited to these.

  In particular, according to the present embodiment, as can be understood from FIG. 4, the water inlet passage 66 is disposed on the bottom wall portion 26 side of the hot water tank 2. For this reason, the bottom surface 66 d of the water inlet passage 66 is formed by the bottom wall portion 26. As described above, since the water inlet passage 66 is arranged on the bottom wall portion 26 side of the hot water tank 2, the water supply pipe 5x (see FIG. 3) connected to the water pipe can be as close as possible to the bottom of the housing of the local cleaning device. . That is, the floating amount of the water supply pipe 5x rising from the bottom of the housing can be suppressed as much as possible. Therefore, piping is convenient, and it is advantageous for miniaturization by suppressing the height dimension of the housing. For this reason, in the vertical direction H, the height position H2 of the bottom surface 66d of the water inlet passage 66 is set to be substantially the same height position or slightly above the height position H1 of the lower end 30d of the cross section of the heating unit 30 of the heater 3. Has been. As shown in FIG. 5, the third partition wall portion 63 and the concave portion 27 of the partition member 6 are disposed below the height position H <b> 1 of the lower end 30 d of the cross section of the heating unit 30.

  According to the present embodiment, when there is no positive movement of hot water, such as when the local cleaning process is not performed, as can be understood from FIG. 4, in the hot water chamber 25, the heating unit 30 of the heater 3. The water heated in step circulates so as to rise in the direction of arrow U by convection or the like, reverse on the upper tank 23 side, and descend in the direction of arrow D. As described above, since the hot water circulates in the hot water chamber 25, in the vertical direction H, the temperature of the hot water in the hot water chamber 25 is ensured well in a region equal to or higher than the height position H 1 of the lower end 30 d of the heater 3. Here, the water existing above the height position H1 of the lower end 30d of the cross section of the heating unit 30 of the heater 3 is effectively warmed by the heating unit 30, the temperature becomes relatively high, and the temperature is moderate. It becomes warm water. For this reason, when there is no active movement of the hot water, such as when the local cleaning process is not performed, the water around the water inlet passage 66 surrounding the water inlet passage 66 (see FIGS. 4 and 8). The temperature can be kept high. On the other hand, in the hot water chamber 25, the water existing below the height position H1 of the lower end 30d of the cross section of the heating unit 30 of the heater 3 rises quickly by convection even if heated by the heating unit 30. Therefore, the temperature is relatively low, and it cannot be said that the water has a moderate temperature. 2, 4, and 6, S <b> 1 is a warm water in which the water in the warm water tank 2 becomes an appropriate warm water when there is no active movement of the warm water, such as when the local cleaning process is not performed. It shows an appropriate temperature region and exists above the height position H1 of the lower end 30d of the cross section of the heating unit 30 of the heater 3. A hot water supply port (not shown) for supplying hot water to a cleaning nozzle for local cleaning is formed on the upper tank 23 side of the hot water tank 2 so as to be located in the region S1. S <b> 2 indicates a region where the water in the hot water tank 2 is not moderately warm water, and exists below the height position H <b> 1 of the lower end 30 d of the cross section of the heating unit 30 of the heater 3.

  Therefore, according to the present embodiment, as described above, in the vertical direction H, the height position H4 of the center C4 of the cross section of the water inlet passage 66 is equal to the height position H1 of the lower end 30d of the cross section of the heating unit 30 of the heater 3. On the other hand, ΔH (see FIGS. 4 and 8) is set to the upper side. For this reason, when there is no active movement of hot water, such as when the local cleaning process is not performed, the temperature of the water around the water inlet passage 66 surrounding the water inlet passage 66 is kept high. For this reason, the water in the water inlet passage 66 is warmed by the hot water around the water inlet passage 66 in the hot water chamber 25 and is preheated well.

  The water preheated in the water inlet passage 66 is pushed out when the new water is supplied from the water supply 5 to the water inlet passage 66 in the direction of arrow E1 (see FIG. 6) and descends in the downward passage 67 in the direction of arrow E2. Then, it reaches the recess 27 (see FIG. 6), and is further ejected from the pore 64 of the third partition wall portion 63 of the partition member 6 upward (in the direction of arrow U2) toward the hot water chamber 25. The water flowing from the pores 64 to the hot water chamber 25 is heated and heated by the heating unit 30 of the heater 3.

  FIG. 8 shows a cross section cut along the direction perpendicular to the axis of the heating unit 30 of the heater 3 and along the vertical direction H. FIG. According to the present embodiment, as shown in FIG. 8, when the heating unit 30 and the water inlet passage 66 of the heater 3 are projected along the horizontal direction from the arrow K direction, the heating unit 30 and the water inlet passage 66 of the heater 3 are In the vicinity of the bottom wall portion 26, the heating portion 30 and the water inlet passage 66 are disposed at a height position such that the projections overlap each other. For this reason, the heating part 30 is arrange | positioned in the bottom wall part 26 vicinity, the height and volume of the upper chamber space part of the heating part 30 among the hot water chambers 25 can be increased as much as possible, and a hot water volume can be increased. Furthermore, both the heating unit 30 and the water inlet passage 66 can be set at substantially the same height position. Therefore, the distance LD (() between the heating unit 30 and the water inlet passage 66 is set while the heating portion 30 of the heater 3 is brought close to the first extended wall portion 21c and the water inlet passage 66 is brought closer to the second extended wall portion 21d. 3 (see FIGS. 3 and 4) can be made as small as possible, which is advantageous for transferring the heat of the heating unit 30 to the water inlet passage 66. As can be understood from FIG. 4, when the height of the water inlet passage 66 is increased to the position Hc, the height positions of the heating unit 30 and the water inlet passage 66 are considerably different, and the inclination angle θa ( 4), the distance LD2 between the heating unit 30 and the water inlet passage 66 is larger than the distance LD, the water inlet passage 66 is moved away from the heating unit 30, and the water in the water inlet passage 66 is not easily warmed by the heater 30. Tend to be.

  According to this embodiment, as can be understood from FIG. 4, the heater 3 is brought close to the first extending wall portion 21 c and the bottom wall portion 26 of the hot water tank 2, in particular, the first extending wall portion 21 c. It arrange | positions, making it approach the 1st corner area MA of the intersection part of the bottom wall part 26 and. Further, as can be understood from FIG. 4, the water intake passage 66 is made close to the second extending wall portion 21 d and the bottom wall portion 26 of the hot water tank 2 facing the first extending wall portion 21 c, in particular. The second extending wall portion 21d and the bottom wall portion 26 are arranged so as to approach the second corner region MB at the intersection.

  Furthermore, when the hot water tank 2 is attached to the local cleaning device, the boss portion 105 (see FIGS. 1 and 9) formed as a protrusion formed on the housing 201 on the local cleaning device side has a V shape of the water supply tool 5. The branch portion 5s can be mechanically faced and engaged while being positioned. It can be a resistance against the boss portion 105 falling off in the direction of the arrow X1 (see FIGS. 1 and 9). For this reason, even when the internal pressure of the hot water chamber 25 becomes excessive, it is possible to reliably prevent the water supply tool 5 from dropping in the direction of the arrow X1 (see FIG. 1). The boss part 105 is a protrusion for supporting the cleaning nozzle, and the cleaning nozzle can be mounted on and supported by the boss part 105 or can be screwed by mounting the cleaning nozzle on the boss part 105.

  As can be understood from FIGS. 4 and 8, the first corner portion MA and the second corner portion MB are in a positional relationship facing each other via the bottom wall portion 26 of the hot water tank 2. For this reason, when there is no active movement of hot water in the hot water chamber 25, such as when the local cleaning process is not performed, the hot water heated by the heater 3 is stored in the lower tank 21 in the hot water chamber 25. 1 is lifted in the direction of arrow U (see FIG. 4) along the extending wall portion 21c and the extending wall portion 23c of the upper tank 23, and then reversed. Thereafter, the extending wall portion 23d of the upper tank 23 and the lower tank 21 It descends in the direction of arrow D (see FIG. 4) along the second extending wall portion 21d. Thus, since the heater 3 is arranged in the first corner portion MA on the first extending wall portion 21c side and the water inlet passage 66 is arranged in the second corner portion MB on the second extending wall portion 21d side, It can contribute to circulating hot water well in the whole chamber 25. In this case, in the region S1 above the lower end 30d of the heater 3, it is possible to contribute to uniform hot water temperature.

  By the way, in order to heat the water in the water inlet passage 66, a structure in which the water inlet passage 66 is brought close to the heating unit 30 of the heater 3 can be considered. However, due to the structure of the local cleaning device, the position of the drain outlet for discharging water discharged from the outlet 53 of the relief valve 54 is determined on the second extending wall 21 d side of the hot water tank 2. Considering this structure, it is restricted that the water inlet passage 66 to which the water supply device 5 having the relief valve 54 is connected is close to the heating unit 30 of the heater 3 in the arrow DA direction (the width direction of the hot water tank 2). There is a situation in which the passage 66 has to be arranged close to the second extending wall portion 21d side. In the present embodiment, the water inlet passage 66 is connected to the second corner on the second extending wall portion 21d side of the hot water tank 2 under the condition that the water inlet passage 66 is restricted from being close to the heating unit 30 of the heater 3. A structure is adopted that is arranged in the portion MB and realizes an effect of preheating water in the water inlet passage 66 as efficiently as possible.

  In addition, according to the present embodiment, the water inlet passage 66 runs parallel to the heating unit 30 of the heater 3 in parallel and in a straight line (see FIG. 3). In this way, the water inlet passage 66 faces the heating unit 30 of the heater 3 and runs in parallel and substantially parallel to the heating unit 30, so that a heat radiation area of the heating unit 30 of the heater 3 is ensured. In addition, the heat receiving area of the water inlet passage 66 can be secured. Therefore, when there is no active movement of hot water, such as when local cleaning is not performed, it is possible to contribute to effective preheating of the water in the water inlet passage 66. Furthermore, since the water inlet passage 66 runs substantially parallel to the heater 30 of the heater 3 in a straight line, the distance LD (see FIG. 3) from the heater 30 of the heater 3 to the water inlet passage 66 also. The water inlet passage 66 can be made substantially uniform over the length direction. Therefore, it is advantageous to warm the water in the water inlet passage 66 as uniformly as possible by using the heating unit 30 of the heater 3. As a result, it is advantageous in reducing the temperature unevenness of the warmed water in the water inlet passage 66.

  According to the present embodiment, as shown in FIG. 8 (a cross-sectional view cut in a direction perpendicular to the axis of the heating unit 30), the bottom wall portion 26 of the hot water tank 2 has a space 25 m with respect to the heating unit 30 of the heater 3. A first bottom wall portion 26f located directly below, a second bottom wall portion 26s that forms the bottom surface 66d of the water inlet passage 66, and an inclination that rises from the first bottom wall portion 26f toward the second bottom wall portion 26s. And an inclined wall portion 26u.

  Thus, the first bottom wall portion 26f is located directly below the height position H1 of the lower end 30d of the section of the heating unit 30 of the heater 3 via the space 25m. For this reason, the temperature of the water WB (see FIG. 8) existing in the vicinity of the first bottom wall portion 26f below the lower end 30d of the cross section of the heating unit 30 of the heater 3 is the water present above the height position H1. It tends to be relatively lower than the temperature of. Therefore, according to the present embodiment, as shown in FIG. 8, in the bottom wall portion 26 of the hot water tank 2, the slope that rises and slopes toward the second bottom wall portion 26 s from the first bottom wall portion 26 f on the low water temperature side. A wall portion 26u is formed. For this reason, the water WB present in the vicinity of the first bottom wall portion 26f and having a relatively low temperature moves to the second bottom wall portion 26s side, that is, the water inlet passage 66 side due to the upward inclination of the inclined wall portion 26u. Is suppressed. For this reason, when the local cleaning is not carried out, the temperature of the water existing outside the water inlet passage 66 can be maintained as high as possible, which can contribute to warming the water in the water inlet passage 66.

  According to the above-described embodiment, for example, when the water in the hot water chamber 25 of the hot water tank 2 is sufficiently stored, the heat of the heating unit 30 of the heater 3 is transmitted to the water in the hot water chamber 25 and the temperature sensor 4. Can satisfactorily measure the temperature of the water in the hot water chamber 25, and the controller can control the temperature of the hot water satisfactorily. However, when the height position of the hot water in the hot water chamber 25 is lower than the height position of the sensor unit 41 of the temperature sensor 4 (for example, emptying), the temperature sensor 4 makes the temperature of the water in the hot water chamber 25 good. When the temperature cannot be measured, the heat of the heating part 30 of the heater 3 can be transferred to the sensor part 41 of the temperature sensor 4 via the heater flange 33 that constitutes the outdoor heat transfer path outside the hot water tank 2. The heat generated by the heating unit 30 can be controlled by the temperature detected by the temperature sensor 4. For this reason, even when the hot water chamber 25 is emptyed, it is possible to prevent the heating unit 30 of the heater 3 from generating excessive heat.

  FIG. 7 shows a view in which the heater flange 33 is viewed from the vertical direction thereof. As shown in FIG. 7, the heater flange 33 does not have an opening that intersects the heat transfer virtual line R1 that virtually connects the temperature sensor 4 and the heating unit 30 at the shortest distance. A metal material constituting the heater flange 33 is provided on the heat transfer virtual line R1. In this case, a metal material having high heat conductivity that constitutes the heater flange 33 is provided on the heat transfer virtual line R1 that virtually connects the temperature sensor 4 and the heating unit 30 of the heater 3 with the shortest distance. For this reason, an outdoor heat transfer path can be formed through the heater flange 33. Thereby, even when the water in the hot water chamber 25 is insufficient, the heat of the heating unit 30 of the heater 3 can be quickly transmitted to the temperature sensor 4 via the heat transfer virtual line R1 in the heater flange 33.

  According to this embodiment, since the heater flange 33 as the outdoor heat transfer member is disposed outside the hot water tank 2, the heater flange 33 is prevented from touching the warm water in the hot water chamber 25 for many years. For this reason, the secular change of the heater flange 33 is suppressed. The heater flange 33 has an attachment hole 33c (attachment portion) for attaching the heater flange 33 to the first side wall portion 21a (wall portion) that forms the hot water chamber 25 of the hot water tank 2. For this reason, the heater flange 33 can be fixed to the first side wall portion 21a, and the outdoor heat transfer path from the heater 3 to the temperature sensor 4 can be favorably maintained.

  As described above, according to this embodiment, the heating flange 30 of the heater 32 and the temperature sensor 4 are heat-contacted by the heater flange 33 and fastened together. For this reason, the heating unit 30 and the temperature sensor 4 inevitably approach each other in distance. In this case, the temperature sensor 4 may detect hot hot water immediately after being heated by the heating unit 30, and there is a possibility that the accuracy of detecting the temperature of the hot water is not sufficient. Therefore, according to the present embodiment, the first and second measures are taken as follows.

  That is, in FIG. 8, an imaginary line WE indicates a vertical imaginary line that passes through the center C <b> 3 of the cross section of the heating unit 30 of the heater 3. The sensor part 41 of the temperature sensor 4 is brought closer to the side farther from the first side wall part 21a than the virtual line WE above the heating part 30 and the water inlet passage 66. That is, as a first countermeasure, the sensor unit 41 of the temperature sensor 4 is disposed not diagonally above the heater 3 but obliquely above the heater 3 while approaching the heater 3. In other words, the sensor unit 41 of the temperature sensor 4 is brought closer to the side closer to the water inlet passage 66 than the virtual line WE, obliquely above the heater 3. Therefore, when projecting from directly above, the heating unit 30 and the temperature sensor 4 run parallel to each other and do not overlap each other. For this reason, it is suppressed that the temperature sensor 4 detects directly the temperature of the hot hot water immediately after the heating which heated by the heating part 30 of the heater 3 and rose. Therefore, the detection accuracy of the temperature sensor 4 that detects the temperature of the hot water is increased. The temperature sensor 4 is disposed obliquely above the water inlet passage 66.

  Further, as a second countermeasure, as shown in FIG. 8, an intermediate plate 26 m (intermediate protrusion) that also serves as a reinforcing rib and a positioning rib is provided between the heating unit 30 and the sensor unit 41 of the temperature sensor 4. A part of the wall 26 projects upward. The upper end 26u of the intermediate plate 26m protrudes above the lower end 30d in the section of the heating unit 30, specifically, above the center C3. For this reason, it is suppressed that the hot warm water immediately after heated by the heating part 30 goes to the sensor part 41 of the temperature sensor 4, and the detection accuracy which detects the temperature of warm water is further ensured. The upper end 26u of the intermediate plate 26m may protrude above the upper end 30u of the heating unit 30. The length in which the intermediate plate 26m extends can be set as appropriate, and can extend along the temperature sensor 4 or the heating unit 30. When sufficient temperature detection accuracy is ensured, the intermediate plate 26m may be eliminated depending on circumstances.

  Now, the main part of this embodiment will be described. According to the present embodiment, as shown in FIG. 9, the water supply tool 5 is formed of resin, is a three-way valve, and projects in the first direction toward the water inlet 21 i of the hot water tank 2. A water supply pipe 51, a water supply pipe 52 protruding in the second direction toward the water supply pipe 5 x connected to the water pipe and the like, and a discharge nozzle 56 protruding in the third direction toward the drain outlet of the base plate of the housing. And a relief valve 54. As described above, the insertion water supply pipe 52 of the water supply tool 5 is fitted and installed in the water inlet 21i of the hot water tank 2 at the time of assembly. Then, the water supply pipe 52 and the relief valve 54 constituting the water supply tool 5 are automatically mounted on the hot water tank 2. Therefore, it is not necessary to install the water supply pipe 52 and the relief valve 54 on the base plate of the housing one by one, and a good assembling property is ensured.

  As shown in FIG. 9, the water supply pipe 52 and the relief valve 54 which comprise the water supply tool 5 form the branch part 5s branched to V shape. In this case, when the insertion water supply pipe 52 of the water supply tool 5 is fitted into the water inlet 21i of the hot water tank 2, as shown in FIG. 9, the branch portion 5s has a protruding boss portion 105 of the base plate of the housing. It faces while being positioned. As a result, even when the internal pressure of the hot water chamber 25 of the hot water tank 2 is excessively high, the water supply pipe 52 of the water supply device 5 drops from the water inlet 21i of the hot water tank 2 in the direction of arrow X1 (see FIG. 9). It is suppressed. In this case, when the tap water pressure suddenly becomes excessive, or when the flow rate of the cleaning nozzle is sharply reduced during local cleaning with hot water ejected from the cleaning nozzle, Even when the internal pressure suddenly becomes excessively high, the V-shaped branch portion 5s of the water supply tool 5 is face-to-face engaged while being positioned on the protruding boss portion 105 formed on the base plate of the housing. doing. For this reason, the protruding boss portion 105 functions as a stopper, and the water supply pipe 52 of the water supply tool 5 from the water inlet 21i is prevented from dropping in the arrow X1 direction.

  Furthermore, according to this embodiment, as shown in FIG. 10, the water supply tool 5 has the snap engagement part 570 as an engagement part which makes the shape of a tongue piece with the snap engagement opening 571. As shown in FIG. The snap engagement portion 570 protrudes from the relief valve main body 540 of the relief valve 54 in the radial direction. The snap engagement portion 570 of the water supply tool 5 is snap-engaged with an engaged portion 202m formed on the warm water tank 2 side in the housing. As a result, the water supply tool 5 is detachably fixed to the hot water tank 2. Thus, since the water supply tool 5 can be attached to the hot water tank 2 by snap engagement, the water supply tool 5 can be attached to the base plate 202 in a screw-less manner, and the assembly workability is good.

  Further, when the hot water tank 2 is attached to the local cleaning device, the protruding boss portion 105 (see FIGS. 1 and 9) formed on the housing 201 on the local cleaning device side branches into a V shape of the water supply tool 5. The portion 5s is mechanically faced and engaged while being positioned. In addition, it can become resistance with respect to the boss | hub part 105 dropping out in the arrow X1 direction (refer FIG. 1, FIG. 9). For this reason, even when the internal pressure of the hot water chamber 25 becomes excessive, it is possible to reliably prevent the water supply tool 5 from dropping in the direction of the arrow X1 (see FIG. 1). The boss part 105 is a protrusion for supporting the cleaning nozzle, and the cleaning nozzle can be mounted on and supported by the boss part 105 or can be screwed by mounting the cleaning nozzle on the boss part 105.

  FIG. 11 shows a cross-sectional view near the relief valve 54. As shown in FIG. 11, the relief valve 54 includes a relief valve main body 540 and a cap 547 that is detachably attached to the relief valve main body 540. The relief valve body 540 includes a relief port 541 that communicates with the discharge port 53 and the hot water chamber 25, a valve portion 542 that opens and closes the relief port 541, a cylindrical body 543 that is coaxially adjacent to the valve portion 542, and a valve portion 542. Has a biasing spring 545 that biases the cylindrical body 543 in a direction (arrow E5 direction) in which the relief port 541 is closed.

  The cap 547 includes a discharge nozzle 56 having a discharge port 53 and a bifurcated claw portion 548. On the outer peripheral portion of the discharge nozzle 56, a jig engaging portion 550 having a ring shape is formed so as to make one round and protrude radially outward. With the relief valve main body 540 and the cap 547 facing each other, one of the relief valve main body 540 and the cap 547 is rotated around the center line C6 with respect to the other, whereby the protrusion 546 of the relief valve main body 540 and The claw portion 548 of the cap 547 is detachably snap-engaged.

  By the way, when the pressure of the tap water supplied to the tap water supply pipe 52 of the water supply tool 5 suddenly becomes excessive, or when the local cleaning is performed with the hot water jetted from the washing nozzle, the water jetted from the washing nozzle When the flow rate of the water is rapidly reduced, the internal pressure of the hot water chamber 25 may become excessive excessively. In this case, the internal pressure of the hot water chamber 25 overcomes the urging force of the urging spring 545, the valve portion 542 opens in the relief direction (arrow E6 direction), and the relief port 541 is opened. That is, in response to the internal pressure of the hot water chamber 25 of the hot water tank 2, the valve portion 542 of the relief valve 54 is automatically opened. At this time, excessive pressure in the hot water chamber 25 escapes from the discharge port 53 of the discharge nozzle 56, and water in the hot water chamber 25 is discharged from the discharge port 53 of the discharge nozzle 56 in the direction of the arrow M1 as relief water through the relief port 541. Then, the water is discharged to the drain outlet 210 of the base plate 202 of the housing 201.

  Here, it is also conceivable to provide the relief valve 54 at a position separated from the water supply tool 5 and connect the relief valve 54 and the drain outlet 210 with a piping hose. In this case, there is a considerable possibility that the piping hose is arranged while being bent due to circumstances during maintenance or the like. In this case, since the relief water discharged from the discharge port 53 of the discharge nozzle 56 of the relief valve 54 flows through the bent piping hose, the drainage to the drain port 210 may be impaired. In this regard, according to the present embodiment, the discharge port 53 of the discharge nozzle 56 of the relief valve 54 directly communicates with and faces the drainage port 210 that exists above the upper surface opening 302 of the toilet bowl 300 in the base plate 202. Therefore, the drainage of the relief water discharged from the discharge port 53 of the discharge nozzle 56 of the relief valve 54 is ensured satisfactorily. At this time, since the drain outlet 210 is surrounded by the water spray suppression roof wall 252, the water spray suppression roof wall 252 suppresses the relief water from spraying. In this case, the relief water is prevented from being scattered in the vicinity of the drain outlet 210 formed in the base plate 202. Therefore, the protection of the electronic components in the housing can be improved.

  According to this embodiment, as described above, the water supply pipe 51 connected to the water inlet 21i of the hot water tank 2, and the water supply pipe 52 protruding toward the water supply pipe 5x connected to the water pipe, And a relief valve 54 having a discharge nozzle 56 protruding toward the drain outlet 210 of the base plate 202 of the housing 201. For this reason, the insertion water supply pipe 51, the water supply water pipe 52, and the relief valve 54 which comprise the water supply tool 5 form the branched part 5s, and the passage of the insertion water supply pipe 51 and the water supply pipe through the branched part 5s. The passage 52 and the relief port 541 of the relief valve 54 communicate with each other. For this reason, even when the pressure of the tap water on the side of the water supply pipe 5x suddenly becomes high due to circumstances of the water supply system so as to be supplied to the tap water supply pipe 52 of the water supply tool 5, excessively high-pressure tap water This overcomes the relief pressure of the relief valve 54 and makes it easier to open the relief port 541. For this reason, it is suppressed that excessively high-pressure tap water is directly and rapidly supplied to the hot water chamber 25 of the hot water tank 2. Therefore, it becomes easy to go to the discharge nozzle 56 of the relief valve 54 from the passage of the water supply pipe 52 through the branch portion 5 s of the water supply device 5, and as a result, from the discharge port 53 of the discharge nozzle 56 to the drain port 210 and thus the toilet 300. Will be discharged. For this reason, it is suppressed that excessively high-pressure tap water is directly and rapidly supplied to the hot water chamber 25 of the hot water tank 2. Therefore, there is an advantage that it is possible to contribute to improvement in durability and long life of the seal portion provided in the hot water tank 2, the temperature sensor 4, and the like. Alternatively, even if the pressure in the hot water chamber 25 of the hot water tank 2 becomes higher than the pressure on the tap water side due to an unexpected situation, the water in the hot water chamber 25 is used as relief water to relieve the relief valve 54. By overcoming the pressure, the relief port 541 is opened and it becomes easy to go to the discharge nozzle 56 of the relief valve 54. Consequently, the water in the hot water tank 25 is prevented from flowing back to the water supply pipe 5x on the tap water side.

  Further, according to the present embodiment, as shown in FIG. 15, the drain outlet 210 is directed toward the destination (in the direction of the arrow M <b> 1) where the relief water is discharged from the discharge outlet 53 of the discharge nozzle 56 of the relief valve 54. The first portion 210f has an inverted V shape in which the opening width of the drainage opening 210 is reduced, and the second portion 210s has a rectangular shape in which the opening width DX (see FIG. 15) of the drain outlet 210 is substantially equal. The first portion 210f is formed on the side farther from the discharge port 53 of the discharge nozzle 56 than the second portion 210s.

  Furthermore, as shown in FIG. 12, the drain outlet 210 formed in the base plate 202 of the local cleaning device has a water-suppressing roof wall 252 having a roof shape and a U-shape in a plan view and projecting upward in the vertical direction. It is enclosed by the standing wall part 256 which makes the standing wall shape. The sprinkling suppression roof wall 252 and the standing wall portion 256 project upward from the base plate 202 of the housing 201. As shown in FIG. 12, the opening on the opposite side of the drain valve 210 from the relief valve 54 is surrounded by a sprinkling suppression roof wall 252. The opening portion of the drain outlet 210 on the side facing the relief valve 54 is surrounded by a standing wall portion 256 having a U shape in plan view.

  The sprinkling suppression roof wall 252 has a continuous reverse V shape (a shape in which V is turned upside down) in the direction in which relief water is discharged (the direction of the arrow M1). As shown in FIG. 11, the inner surface 252 i of the water spray suppressing roof wall 252 is a continuous section having a predetermined curvature toward the drain outlet 210 in the cross section along the center line C <b> 6 of the discharge nozzle 56 of the relief valve 54. An arc Ra (see FIG. 11) extends. In this case, when relief water is discharged from the discharge port 53 of the discharge nozzle 56 of the relief valve 54 toward the drain port 210 of the base plate 202, even if the relief water hits the inner surface 252 i of the water spray suppression roof wall 252, the relief water is discharged. Water sprinkling (water splashing etc.) is easily suppressed. Therefore, the drainage of the relief water discharged to the drain outlet 210 is improved.

  As can be understood from FIGS. 12 and 14, the water spray suppression roof wall 252 descends as the center 253c is the highest in the cross section in the direction orthogonal to the center line C6 of the discharge nozzle 56 of the relief valve 54 and toward both ends 253e. An inverted V shape (a shape in which V is turned upside down) having a descending inclined wall 253 forming an inclined mountain shape is formed. In this case, as shown in FIG. 13A, it is assumed that the discharged relief water is discharged toward the water sprinkling suppression roof wall 252 along the imaginary lines K1, K2, and K3. A central portion in the thickness direction of the water flow of the relief water is discharged along the virtual line K2. An end portion in the water flow thickness direction of the relief water is discharged along virtual lines K1 and K3. As schematically shown in FIG. 13A, when the water flow of the relief water collides with the inner surface of the descending inclined wall 253 having an inverted V shape, the water flow of the relief water is collected by the inner surface 253i of the descending inclined wall 253. Guided in the direction of That is, the relief water is guided in the direction in which the flow width of the relief water is converged. In particular, the central portion of the relief water having the highest water pressure is discharged toward the imaginary line K2, and collides with the inner surface near the intersection 253h where the water collecting effect between the descending inclined walls 253 is high. The water flow is effectively collected, and relief water spraying is suppressed. Thus, it is suppressed by the water spray suppression roof wall 252 that relief water sprays. As a result, the relief water is prevented from being scattered near the drain outlet 210 formed in the base plate 202. In this sense, the extension line of the center line C6 of the relief valve main body 540 of the relief valve 54 preferably passes through the intersection 253h between the descending inclined walls 253. In plan view, when ε is the amount of positional displacement between the extended line of the center line C6 and the intersection 253h in the direction orthogonal to the center line C6, and δ is the inner diameter of the discharge port 53, ε = δ / 3 or less, ε = δ / 4 or less, ε = δ / 5 or less, and ε = δ / 7 or less are preferable.

  As schematically shown in FIG. 13 (B), when the water spray suppression roof wall has a semicircular shape instead of an inverted V shape in cross section, the water flow of relief water is in the direction of virtual lines K1, K2, and K3. The water collecting capacity of the relief water may not always be sufficient when it collides with the inner surface of the water spray control roof wall. In particular, assuming that the tangent line of the arc that forms the center of the water spray-suppressing roof wall is K7, the central portion of the relief water stream that directly hits the tangent line K7 is reflected and reflected. There is a possibility that water will sprinkle, and the water collecting effect may not be sufficient.

  According to the present embodiment, as shown in FIGS. 11 and 12, the discharge nozzle 56 of the relief valve 54 of the water supply device 5 is inclined downward while the center line C6 of the discharge nozzle 56 moves toward the tip of the discharge nozzle 56. It is directed to face the drain outlet 210 of the base plate 202 of 201. Thus, since the discharge nozzle 56 of the relief valve 54 is inclined downward toward the tip thereof, the water drainage from the discharge port 53 of the discharge nozzle 56 of the relief valve 54 is good. In particular, since the axial length L7 of the discharge nozzle 56 is larger than the inner diameter δ of the discharge port 53 of the discharge nozzle 56 (see FIG. 11), water spray is suppressed. Therefore, the relief water is satisfactorily discharged from the discharge port 53 of the discharge nozzle 56 to the drain port 210 of the base plate 202 and further discharged to the upper surface opening 302 of the toilet bowl 300 (see FIG. 11).

  For quality assurance, it is preferable to perform a leak test by closing the discharge port 53 of the discharge nozzle 56 at the time of inspection at the time of assembly, at the time of inspection after assembly, inspection before shipment, inspection after shipment, and the like. Therefore, as shown in FIG. 12, the water supply tool 5 includes a ring-shaped jig engaging portion 550 that makes one round around the center line C <b> 6 of the discharge nozzle 56. As shown in FIGS. 16 and 17, the leak test jig 8 used in the leak test has a structure similar to a clothespin, and includes two plate portions 80 facing each other and two pieces of A rotating shaft portion 82 that rotates the one end portions 80a of the plate portion 80 in a direction to approach each other and a direction to separate them from each other, and a direction in which the one end portions 80a of the two plate portions 80 approach each other (arrows W2, W3). And a torsion coil spring 83 as a spring biased in the direction).

  In the leak test, the other end portion 80c of the plate portion 80 of the leak test jig 8 is held by an operator's fingertip or a tool or the like, and as shown in FIGS. While engaging with the ring-shaped jig engaging part 550 of the water supply tool 5, the one end part 80a of the other plate part 80 is applied to the front end surface 56f of the discharge nozzle 56 of the water supply tool 5, and the discharge port 53 is airtight or Close liquid-tight.

  As described above, when the discharge port 53 of the discharge nozzle 56 is closed by the leak test jig 8 in the leak test, the pressure is prevented from escaping from the discharge port 53 of the discharge nozzle 56. In this case, as shown in FIG. 17, a leak test jig 8 is attached to the water supply device 5 before being attached to the hot water tank 2, and a test fluid having a predetermined pressure is supplied into the water supply device 5 to perform a leak test (leak test). ) May be carried out. Further, as shown in FIG. 16, a leak test jig 8 is attached to the water supply device 5 attached to the hot water tank 2, and a test fluid having a predetermined pressure is supplied to both the hot water tank 2 and the water supply device 5. And you may decide to do a leak test. In consideration of the above-described leak test, according to the present embodiment, the leak test is performed on the water supply device 5 attached to the hot water tank 2 as shown in FIG. 11 and FIG. An arrangement space 59 for arranging the test jig 8 is formed between the front end face 56 f of the discharge nozzle 56 of the water supply tool 5 and the end face 252 f of the water spray suppression roof wall 252. In order to suppress the sprinkling of the relief water blown out from the discharge nozzle 56, the front end surface 56f of the discharge nozzle 56 is brought as close as possible to the water spray suppressing roof wall 252, and the arrangement space 59 does not exist or is small if present. Is preferred. However, according to the present embodiment, the arrangement space 59 for arranging the leak test jig 8 is formed so that the leak test can be performed at the time of assembly or maintenance in order to improve the reliability with respect to the leak.

(Application form)
FIG. 18 shows an example of the application form. A local cleaning device 200 is mounted at the rear of the western toilet 300. The local cleaning device 200 includes a housing 201, a plurality of cleaning nozzles 205 that clean a local part of a living body such as a human body, and a hot water tank device (not shown in FIG. 18) that supplies hot water to the cleaning nozzle 205. The housing 201 includes a base plate 202 that is attached to the rear portion of the toilet bowl 300 by a fixture, a cover 203 that is attached to the base plate 202 and forms a storage chamber that houses the hot water tank apparatus, and an operation switch 207 provided on the cover 203. An operation panel 209, a toilet seat 212 pivotally supported by the housing 201 so as to be swingable in the vertical direction, and a toilet lid 211 pivotally supported by the housing 201 so as to be swingable in the vertical direction.

(Other embodiments)
The structure of the hot water tank is not limited to the structure shown in FIG. The heater and the temperature sensor may be assembled in the hot water tank in a vertical type instead of a horizontal type. The heater may be provided above the hot water chamber. Instead of the partition member 6, it may be a pipe. The hot water tank may not be divided. According to Embodiment 1 described above, the passage of the plug-in water supply pipe 51, the passage of the water supply pipe 52, and the relief port 541 of the relief valve 54 composing the water supply device 5 communicate with each other at the branch portion 5s. It is not limited to. That is, for supplying water to the hot water chamber 25, the passage of the tap water pipe 52 on the side of the tap water and the passage of the plug water pipe 51 communicate with each other, and there is a difference for discharging relief water from the hot water chamber 25. Although the passage of the inlet water supply pipe 51 communicates directly with the relief port 541 of the relief valve 54, the tap water supply pipe 52 on the tap water side may not directly communicate with the relief port 541 of the relief valve 54.

  According to the first embodiment described above, the heater 3 and the temperature sensor 4 are attached to the hot water tank 2 by the heater flange 33, but not limited to this, the heater 3 and the temperature sensor 4 are individually connected to the hot water tank 2. It may be attached. According to the first embodiment described above, in the vertical direction H, the height position H4 of the center C4 of the cross section of the water inlet passage 66 is ΔH relative to the height position H1 of the lower end 30d of the cross section of the heating unit 30 of the heater 3. Although not limited to this, the height position H4 of the center C4 of the cross section of the water inlet passage 66 is the same height position as the height position H1 of the lower end 30d of the cross section of the heating unit 30 of the heater 3. Good or lower side is acceptable. According to the first embodiment described above, the inlet of the water inlet passage 66 in the hot water tank 2 is formed on the same side as the heater insertion port 21h. However, the present invention is not limited to this. The water inlet 5 and the water supply tool 5 may be provided on the second side wall portion 21b opposite to the heater insertion port 21h.

  According to the first embodiment described above, when the heating unit 30 and the water inlet passage 66 of the heater 3 are projected along the horizontal direction, the heating unit 30 and the water inlet passage 66 of the heater 3 are included in the heating unit 30 and the water inlet passage 66. However, the present invention is not limited to this, and the heating unit 30 and the water inlet passage 66 of the heater 3 are arranged at such a height position that they do not overlap each other. Also good. According to the first embodiment described above, the partition member 6 that forms the water flow portion is used. However, the present invention is not limited to this, and the water inlet passage 66 and the descending passage 67 may be formed by pipes. The partition member 6 is separate from the hot water tank 2, but may be formed integrally with the hot water tank 2.

  According to the first embodiment described above, the drain outlet 210 formed in the base plate 202 is surrounded by the water spray suppression roof wall 252 and the standing wall portion 256, but is not limited thereto, and only the water spray suppression roof wall 252 is included. It may be surrounded. The sprinkling suppression roof wall 252 has a portion having an inverted V shape, but is not limited thereto, and the sprinkling suppression roof wall may be a gate shape. In addition, the present invention is not limited to the embodiment described above and shown in the drawings, and can be implemented with appropriate modifications without departing from the scope of the invention. Structures and functions specific to one embodiment can be applied to other embodiments. The following technical idea can also be grasped from this specification.

  (Additional Item 1) A hot water tank having a wall portion that forms a hot water chamber for storing hot water for local washing and a water inlet that communicates with the hot water chamber and enters the hot water chamber; and a hot water tank that is attached to the water inlet of the hot water tank. A water supply device for supplying water through the water inlet, a washing nozzle that blows hot water from the hot water tank toward the local part of the living body, a drain port that is equipped with the hot water tank and the washing nozzle and communicates with the upper surface opening of the toilet A local cleaning device comprising a housing having a base plate to be formed. Water can be drained from the drain port of the base plate of the housing to the top opening below the part.

  (Additional Item 2) In Additional Item 1, the drainage port formed in the base plate of the housing is surrounded by a water spray-reducing roof wall having a roof shape that suppresses water spraying from the drainage port. A local cleaning device. Watering is suppressed.

  (Additional Item 3) In Additional Item 2, the water-suppressing roof wall formed on the base plate is a cross section in a direction perpendicular to the center line of the discharge nozzle of the relief valve, and the peak is higher in the center and descends downward toward both ends. A local cleaning apparatus comprising a portion having an inverted V shape having a downwardly inclined wall forming a shape. Water spraying of the relief water blown from the discharge nozzle of the relief valve is suppressed.

  The present invention can be used for a local cleaning apparatus for cleaning a local part such as a human body.

FIG. 4 is a plan view of a hot water tank according to the first embodiment. It is a side view which shows the heater attachment side of a warm water tank. It is a perspective view which shows the internal structure of the lower tank which comprises a warm water tank. It is sectional drawing which showed the internal structure of a hot water tank and followed the IV-IV line of FIG. It is sectional drawing which showed the internal structure of a hot water tank and followed the VV line of FIG. It is sectional drawing cut | disconnected along the longitudinal direction of a hot water tank. It is a figure which shows the state which has attached the temperature sensor using the heater flange of a heater. It is sectional drawing which shows the bottom wall part vicinity of a warm water tank. It is a top view which shows the water supply pipe which has a three-way valve shape. It is a perspective view which shows the state which is making the snap engagement part of the water supply pipe snap-fit to the to-be-engaged part by the side of a housing. It is sectional drawing which shows the cross section of the relief valve vicinity which is a part of water supply pipe. It is a perspective view which shows the state which the discharge nozzle of the relief valve of a water supply pipe has faced the drain outlet of the baseplate of the housing of a local washing | cleaning apparatus. (A) is a figure which shows typically the form in which the relief water discharged from the discharge nozzle of a relief valve hits the water spray suppression roof wall of embodiment, (B) is the relief water discharged from the discharge nozzle of a relief valve It is a figure which shows typically the form which hits the watering suppression roof wall of a comparison form. It is a figure which shows the water spray suppression roof wall vicinity formed around the drain outlet from upper direction. It is a figure which shows the drain outlet currently formed in the base plate of a housing from upper direction. It is a perspective view which shows typically the state which has attached the leak test jig | tool to the relief valve of a water supply pipe. It is a perspective view which shows typically the state which has attached the leak test jig | tool to the relief valve of a water supply pipe. It is a perspective view which shows an application form and shows a local cleaning apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 is a warm water tank apparatus, 2 is a warm water tank, 21 is a lower tank, 21a is a 1st side wall part, 21b is a 2nd side wall part, 21c is a 1st extending wall part, 21d is a 2nd extending wall part, 21h is Heater outlet, 21s is sensor inlet, 21i is water inlet, 21r is an assembly hole, 23 is an upper tank, 25 is a hot water chamber, 26 is a bottom wall portion, 26f is a first bottom wall portion, and 26s is a first portion. 2 bottom wall portion, 26u is an inclined wall portion, 26m is an intermediate plate, 27 is a recess, 3 is a heater, 30 is a heating portion, 30d is a lower end, 33 is a heater flange, 33c is a mounting hole, 34 is a fixture, Temperature sensor, 41 is a sensor part, 42 is a sensor flange, 43 is a seal part, 44 is a sensor base end part, 5 is a water supply tool, 5s is a branching part, 51 is an insertion water supply pipe, 52 is a water supply pipe, 53 is Discharge ports 53 and 54 are relief valves, 540 is a relief valve body, and 541 is a relief valve. 542 is a valve portion, 550 is a jig engaging portion, 56 is a discharge nozzle, 57 is a discharge port, 570 is a snap engagement portion (engagement portion), 571 is a snap engagement opening, 59 is an arrangement space, 6 is a partition member, 61 is a first partition wall portion, 62 is a second partition wall portion, 63 is a third partition wall portion, 66 is a water inlet passage, 67 is a descending passage, 8 is a leak test jig, and 80 is a plate portion. , 83 is a torsion coil spring, 200 is a local cleaning device, 201 is a housing, 202 is a base plate, 202m is an engaged portion, 230 is a cover, 205 is a cleaning nozzle, 210 is a drain outlet, 252 is a water spray suppressing roof wall, 253 is A downward inclined wall, 256 is a standing wall portion, 300 is a toilet, and 302 is an upper surface opening of the toilet.

Claims (9)

A hot water tank having a wall portion that forms a hot water chamber for storing hot water for local washing and a water inlet that communicates with the hot water chamber and enters the hot water chamber;
A water supply tool attached to the water inlet of the hot water tank for supplying water to the hot water chamber via the water inlet;
A cleaning nozzle that sprays the hot water in the hot water tank toward a local part of the living body;
A housing having a base plate on which the hot water tank and the washing nozzle are mounted and which forms a drain outlet communicating with the upper surface opening of the toilet;
The water supply tool is
An insertion water supply pipe that protrudes in the first direction and is inserted and fitted into the water inlet of the hot water tank, and a water supply system pipe that is connected to the insertion water supply pipe so as to protrude in the second direction. Water in the hot water chamber is relief water when protruding in a third direction so as to be connected to the connected water supply pipe, the plug water supply pipe and the water supply pipe and the pressure of the hot water chamber rises above a predetermined value. And a relief valve having a discharge nozzle having a discharge port for discharging to the drain port of the base plate of the housing ,
The said water supply tool has a snap engaging part snap-engaged with the to-be-engaged part currently formed in the said warm water tank, The local washing | cleaning apparatus characterized by the above-mentioned.   The local cleaning according to claim 1, wherein a passage of the plug-in water supply pipe, a passage of the water supply pipe, and a relief port of the relief valve constituting the water supply device communicate with each other in the water supply device. apparatus. 3. The water supply tool according to claim 1 , wherein the water supply tool has a jig engaging portion for detachably attaching a leak test jig for performing a leak test by closing a discharge port of the discharge nozzle to the water supply tool. A featured local cleaning device. In Claim 3 , the drain outlet formed in the base plate of the housing is surrounded by a water spray suppressing roof wall that forms a roof shape that suppresses water spraying,
An arrangement space in which the leak test jig for closing the discharge port of the discharge nozzle is detachably disposed is formed between a tip portion of the discharge nozzle of the water supply tool and the watering suppression roof wall. A local cleaning device. In one of claims 1-4, wherein the discharge nozzle of the relief valve of the water supply device, while downward slope as this center line is directed at the tip of the discharge nozzle, wherein said base plate of said housing A local cleaning apparatus characterized by being directed to face the drainage port. 5. The water spray suppression roof wall formed on the base plate according to claim 4 is a cross section in a direction perpendicular to the center line of the discharge nozzle of the relief valve, and has a mountain shape that is high in the center and descends downward toward both ends. A local cleaning apparatus having an inverted V-shaped portion having a downwardly inclined wall. 6. The drain port formed in the base plate according to claim 5 , wherein an opening width of the drain port becomes smaller toward a destination where relief water is discharged from the discharge port of the discharge nozzle of the relief valve. A local cleaning device having at least a portion having a shape . In Claim 6 , the said watering suppression roof wall is making the said reverse V shape continue in the direction in which relief water is discharged, and the inner surface of the said watering suppression roof wall is the center of the said discharge nozzle of the said relief valve. A local cleaning device, characterized in that it extends continuously in a circular arc toward the drain outlet in a cross section along a line.   9. The water supply pipe and the relief valve constituting the water supply device according to claim 1, wherein the water supply pipe and the relief valve form a branch portion that branches into a V shape, Is inserted into and inserted into the water inlet of the hot water tank, the branch portion is face-to-face engaged with the protrusion of the base plate of the housing, and the water supply of the water supply tool from the water inlet is inserted. A local cleaning device characterized by suppressing the drop-off of the tube.

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