JP2010106590A - Warm water tank device for washing private part - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a warm water tank device for washing the private parts which can enhance the use efficiency of a warm water chamber of a warm water tank. <P>SOLUTION: The warm water tank device includes: the warm water tank 2 which has the warm water chamber 25, a bottom wall 26 forming a bottom surface of the warm water chamber 25, and a recess 27 formed at the bottom wall 26; a heater 3 which has a long heating portion 30 arranged along a horizontal direction in the warm water chamber 25; and a water passing portion 6 which is arranged along the bottom wall 26 of the warm water tank 2 so as to guide water to the recess 27. The water passing portion 6 forms a water entry passage 66 communicating with a water entry port 21i of the warm water chamber 25, and a descending passage 67 which descends toward the recess 27 from the water entry passage 66 so that the water flowing through the water entry passage 66 can flow into the recess 27. A height position H4 of the center C4 of the cross section of the water entry passage 66 is set identical with or higher than a height position H1 of a lower end 30d of the cross section of the heating portion 30 of the heater 3 in a vertical direction H. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

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

2. Description of the Related Art Conventionally, there has been provided a hot water tank apparatus for local cleaning that includes a hot water tank that forms a hot water chamber for storing hot water for local cleaning. In such a hot water tank apparatus, a technique is known in which a partition member is provided inside the hot water tank, and the partition member forms a warm water chamber and a bypass passage partitioned with respect to the warm water chamber (Patent Document 1). According to this, the heater is disposed in the hot water chamber along the horizontal direction. The bypass passage is disposed on the bottom side of the hot water chamber so as to be positioned below the heater, and communicates with the toilet bowl via a relief valve. When the internal pressure of the hot water chamber becomes excessive due to the operation of the washing nozzle, etc., the relief valve is automatically opened by the internal pressure, and the internal pressure of the hot water chamber is reduced by discharging the water in the bypass passage into the toilet. It suppresses becoming excessive.
JP-A-10-159156

  According to the hot water tank described above, the bypass passage is arranged on the bottom side of the hot water chamber so as to be positioned below the heater, and is partitioned by the partition member, so that the water in the bypass passage is not easily heated by the heater. . Because of the convection of hot water stored in the hot water chamber, the water above the lower end of the heater cross-section rises in temperature, but the water below the lower end of the heater is less likely to rise in temperature. is there. For this reason, the use efficiency of the hot water chamber of the hot water tank is not always sufficient. Therefore, the cleaning time for the local cleaning becomes longer, or when the next user immediately performs the local cleaning following the previous user, the temperature of the hot water used for the local cleaning may be rapidly decreased.

  The present invention has been made in view of the above-described circumstances, and can improve the use efficiency of the hot water chamber of the hot water tank. Therefore, the cleaning time for local cleaning becomes longer, or following the previous user. It is an object of the present invention to provide a hot water tank device for local cleaning that can suppress the fear that the temperature of hot water used for local cleaning suddenly drops even when the next user immediately performs local cleaning. It is in.

  The hot water tank apparatus for local cleaning according to the present invention is formed in (i) a hot water chamber for storing hot water for local cleaning, a bottom wall portion that forms the bottom surface of the hot water chamber, and a bottom wall portion so that water can be passed from the hot water chamber. A hot water tank having a recessed part to be partitioned; (ii) a heater having a long heating portion that is disposed along the horizontal direction in the hot water chamber and can face water in the hot water chamber; and (iii) a bottom wall of the hot water tank And (iv) a water passage that communicates with a water inlet of the hot water chamber so that warm water is supplied to the water passage. A passage and a descending passage that descends from the water inlet passage toward the concave portion and flows the water flowing through the water inlet passage into the concave portion, and (v) in the vertical direction, the height of the center of the cross section of the water inlet passage in the water passage portion The height position is the same as or higher than the height position of the lower end of the cross section of the heater heating section. Characterized in that it is set to.

  According to the present invention, the hot water tank has a hot water chamber for storing hot water for local cleaning, a bottom wall portion that forms the bottom surface of the hot water chamber, and a recess formed in the bottom wall portion. The heater has a long heating portion facing the hot water chamber so that the water in the hot water chamber can be heated. The water in the hot water chamber heated by the heating unit rises by convection in the hot water chamber.

  The heating unit is arranged along the horizontal direction in the hot water chamber, and the uniform heating property for the whole water in the hot water chamber of the hot water tank is improved, and the heater mounting property for the hot water chamber is ensured. Here, “the heating part is arranged along the horizontal direction” means that the heating part of the heater is arranged on the horizontal line, and is somewhat within plus or minus θ (15 °) with respect to the horizontal line. It is meant to include forms that are inclined and arranged along the horizon. A horizontal line is a virtual line orthogonal to the vertical line. The water flow portion is disposed along the bottom wall portion of the hot water tank, and guides the water supplied from the water supply tool to the concave portion of the bottom wall portion. The water guided to the recess flows into the hot water chamber and is heated by the heating part of the heater to become hot water. Hot water is blown out for local cleaning from a local cleaning nozzle (not shown).

  Now, the above-mentioned water passage part flows the water flowing in the water inlet passage through the water inlet passage communicating with the water inlet of the hot water chamber so as to be supplied with hot water and the water flowing down the water inlet passage from the water inlet passage toward the concave portion. And a descending passage. Here, the hot water in the hot water chamber heated by the heater when the hot water in the hot water chamber is not consumed and there is no active movement of the hot water in the hot water chamber, such as when the local cleaning process is not performed, It circulates in the hot water chamber by convection. Here, the water existing above the height position of the lower end of the cross section of the heater heating section in the hot water chamber has a relatively high temperature and is in an appropriate hot water state. Thus, 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 in the hot water chamber is also warm. On the other hand, the water existing below the height position of the lower end of the cross section of the heater heating section in the hot water chamber is relatively low in temperature and cannot be said to be moderate hot water.

  Therefore, according to the present invention, in the vertical direction, the height position of the center of the cross section of the water inlet passage of the water flow section is set to be the same as or higher than the height position of the lower end of the cross section of the heater heating section. . For this reason, when the local cleaning process is not performed and there is no positive movement of the hot water in the hot water chamber, the water in the water inlet passage is warmed and preheated by the warm water around the water inlet passage in the hot water chamber. The In addition, when water is newly supplied from the water supply system to the water inlet passage, the water preheated in the water inlet passage descends the downward passage, is supplied to the concave portion, and further flows into the hot water chamber. The water that has flowed into the hot water chamber is heated and heated by the heater of the heater. Here, the center of the cross section of the water inlet passage means the center in the cross-sectional area cut in the direction orthogonal to the length direction of the water inlet passage.

  According to the present invention, the following preferred embodiments can be adopted. It is preferable that the hot water tank has a heater insertion port into which the heating portion of the heater is inserted into the hot water chamber, and the inlet of the water inlet passage in the hot water tank is formed on the same side as the heater insertion port. In this case, since the inlet of the water inlet passage in the hot water tank is formed on the same side as the heater insertion port, the electrical wiring connected to the heater inserted into the heater insertion port, the water supply tool connected to the inlet of the water inlet passage Assembling work for assembling and water supply piping can be performed from a common direction, and assembling workability can be improved. Furthermore, it is advantageous to shorten the wiring distance of the electric wiring and the piping distance of the water supply piping when the electric wiring and the water supply piping are arranged from the main body of the local cleaning device.

  Further, when the heater heating section and the water inlet passage are projected along the horizontal direction from the direction orthogonal to the length direction of the heater heating section, the heater heating section and the water inlet passage are the heating section and the water inlet passage. It is preferable that at least a part is disposed at a height position where they overlap each other (Claim 3). In this case, it is convenient to set the heating unit and the water inlet passage at substantially the same height, and the structure of claim 1 can be easily realized. Moreover, in the top view, it is preferable that the water intake passage of the water flow portion is running parallel to the heating portion of the heater. In this case, it is possible to satisfactorily secure the heat receiving area of the water inlet passage that runs parallel to the heating portion of the heater, and the water in the water inlet passage can be efficiently preheated. Further, the distance between the heater heating section and the water inlet passage can be prevented from greatly fluctuating in the length direction of the water inlet passage and the heating section, which is advantageous in suppressing the temperature unevenness of the water preheated in the water inlet passage. It is.

  Moreover, in the cross section which cut | disconnects a warm water tank along a perpendicular direction, the bottom wall part of a warm water tank is the 1st bottom wall part located right below through the space with respect to the heating part of a heater, and the water flow of a water flow part It is preferable to include a second bottom wall portion that forms the bottom surface of the passage, and an inclined wall portion that rises and slopes from the first bottom wall portion toward the second wall portion. In this case, since the first bottom wall portion is located directly below the heating portion of the heater through the space, the temperature of water near the first bottom wall portion is relatively low. In the bottom wall portion of the hot water tank, an inclined wall portion that rises and slopes from the first bottom wall portion toward the second bottom wall portion is formed. For this reason, when there is no active movement of hot water in the hot water chamber, such as when the local cleaning process is not performed, the temperature near the first bottom wall portion is lower than the lower end of the cross section of the heating unit. It is constrained that the relatively low water moves to the second bottom wall portion side, that is, the water inlet passage side. For this reason, the temperature of the water existing around the water inlet passage can be maintained at a high temperature, which is advantageous for preheating the water in the water inlet passage with the hot water around the water inlet passage.

  As described above, according to the present invention, the water passage portion described above is lowered toward the recessed portion from the water inlet passage and the water inlet passage communicating with the water inlet of the hot water chamber so as to be supplied with water that becomes hot water. A descending passage for flowing water flowing through the water inlet passage into the recess is formed. Here, in the vertical direction, the height position of the center of the cross section of the water inlet passage of the water flow section is set to be the same as or higher than the height position of the lower end of the cross section of the heating section of the heater. For this reason, when there is no active movement of the hot water in the hot water chamber, such as when local cleaning is not performed, the water in the water inlet passage is warmed by the hot water near the water inlet passage in the hot water chamber and preheated. Is done. For this reason, the use efficiency of a hot water chamber can be improved. Therefore, it is used for local cleaning while reducing the size of the hot water tank, even when the cleaning time for local cleaning becomes longer or when the next user immediately performs local cleaning following the previous user. The possibility that the temperature of the hot water is rapidly reduced can be suppressed.

  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 tool 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 receptacle 21r. Thereby, the heating unit 30 of the heater 3 is installed in a 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. Although the temperature sensor 4 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 that is further away from the hot water chamber 25 than the sensor flange 42 of the temperature sensor 4 is inserted into the hot water chamber 25. It is exposed to the outside from the first side wall portion 21a of the hot water tank 2. 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 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 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, and a penetrating mounting hole 33c.

  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 not to the ceiling wall of the hot water tank 2 but to the first side wall portion 21a. 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, and the heater flange 33 is in thermal contact with the bowl-shaped sensor flange 42. However, this is pressed to the warm water chamber 25 side. Therefore, the temperature sensor 4 is also assembled not on the ceiling wall of the hot water tank 2 but on the first side wall portion 21a. Thus, both the heater 3 and the temperature sensor 4 are fastened to the hot water tank 2 by the heater flange 33 together. Here, 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 detached outward. In FIG. 7, a virtual line R1 indicates a virtual line that virtually connects the heater 3 and the temperature sensor 4 with the shortest distance.

  As described above, 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. As shown in FIG. 3, the water supply tool 5 includes an insertion water supply pipe 51 having a hollow tubular shape that is inserted into the water inlet 21 i, a water supply pipe 52 having a hollow tubular shape that is communicated with the water supply system by a water supply pipe 5 x, and a discharge port And a relief valve 54 having a tip 53. When the internal pressure of the hot water chamber 25 increases excessively, the relief valve 54 opens automatically 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. 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. Further, when the hot water tank 2 is attached to the local cleaning device, the water supply device 5 is mechanically opposed to and engaged with the protruding engaging portion 105 (see FIG. 1) formed in the housing on the local cleaning device side. To do. It can be a resistance against the engagement portion 105 falling off in the direction of the arrow X1. 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 arrow direction X1 direction (see FIG. 1).

  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, an engagement protrusion 26p that forms a wall shape upward from the bottom wall portion 26 is formed in a rail shape. The partition member 6 has an engaged protrusion 6p having 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.

  Now, according to the present embodiment, as described above, the partition member 6 serving as the water passage portion includes the water inlet passage 66 that communicates with the water inlet 21i of the hot water chamber 25 so that the water that is the hot water is supplied. A descending passage 67 is formed which flows from the water inlet passage 66 toward the concave portion 27 and flows through the water inlet passage 66 to the concave portion 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. Since the water inlet passage 66 is arranged on the bottom wall portion 26 side of the hot water tank 2 in this way, the water supply pipe 5x (see FIG. 3) connected to the water inlet passage 66 can be as close as possible to the bottom of the housing of the local cleaning device. it can. 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.

  Now, according to the present embodiment, when there is no active movement of the hot water, such as when the local cleaning process is not performed, the heating unit of the heater 3 in the hot water chamber 25 can be understood from FIG. The water warmed at 30 is circulated 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. Thus, since the warm water circulates in the warm water chamber 25, in the vertical direction H, the temperature of the warm water in the warm water chamber 25 is ensured in a region higher than the height position H1 of the lower end 30d of the cross section 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 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 can be kept high. it can. 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.

  In FIG. 2 and FIG. 6, S1 indicates a warm water appropriate temperature region 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 is shown 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. 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, it is set up by ΔH (see FIG. 4). 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 the arrow E1, and descends in the downward passage 67 in the direction of the arrow E2 into the recess 27. Further, (see FIG. 6), further, the third partition wall portion 63 of the partition member 6 is ejected from the pore 64 toward the hot water chamber 25 upward (in the direction of arrow U2). 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. Furthermore, due to circumstances such as the layout, the heating unit 30 and the water entering the water 3 while bringing the heating unit 30 of the heater 3 close to the first extending wall 21c and bringing the water inlet passage 66 toward the second extending wall 21d. The distance LD (see FIGS. 3 and 4) with the passage 66 can be made as small as possible, which is advantageous for transferring the heat of the heating unit 30 to the incoming water 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. In addition, according to this embodiment, as shown in FIG. 8, the height position H4 of the center C4 of the cross-sectional area of the water inlet passage 66 of the partition member 6 is the height of the center C3 of the cross section of the heating part 30 of the heater 3. It is set above or at the same height as the position H3. However, in some cases, the height position H4 of the center C4 of the cross-sectional area of the water inlet passage 66 may be lower than the height position H3 of the center C3 of the cross section of the heating unit 30.

  In FIG. 8, an imaginary line WE indicates a vertical line passing 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. Therefore, 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, it is suppressed that the temperature sensor 4 directly detects the temperature of the hot hot water immediately after the heating which is heated by the heating unit 30 of the heater 3 and rises. 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 shown in FIG. 8, an intermediate plate 26 m that also serves as a reinforcing rib and a positioning rib projects partially upward from the bottom wall portion 26 between the heating portion 30 and the sensor portion 41 of the temperature sensor 4. Has been. 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.

  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.

  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. The first extending wall portion 21c and the extending wall portion 23c of the upper tank 23 are lifted in the direction of the arrow U and then reversed. Thereafter, the extending wall portion 23d of the upper tank 23 and the second extending wall of the lower tank 21 are reversed. It descends in the direction of arrow D along the 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, it is possible to contribute to uniform hot water temperature in a region above the lower end 30d of the heater 3.

  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 in the direction of the arrow DA can be considered. However, due to the structure of the local cleaning device, the position of the drainage part for discharging the water discharged from the discharge port 53 of the relief valve 54 is determined on the second extending wall part 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 intake passage 66 runs parallel to the heating unit 30 of the heater 3 in parallel and in a straight line. 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, an inclined wall portion 26u that rises and slopes from the first bottom wall portion 26f toward the second bottom wall portion 26s is formed. Has been. 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. The height position of the second bottom wall portion 26 s forming the bottom surface 66 d of the water inlet passage 66 is higher than the height position of the upper end of the pore 64 and the height position of the recess 27.

  As described above, according to the present embodiment, the partition member 6 serving as the above-described water passing portion includes the water inlet passage 66 communicating with the water inlet 21i of the hot water chamber 25 and the water inlet so that the water serving as the hot water is supplied. A descending passage 67 is formed which flows from the passage 66 toward the recessed portion 27 and flows into the recessed portion 27 through the water entering passage 66. 4 and 8, in the vertical direction H, the height position H4 of the center C4 of the cross section of the water intake passage 66 is higher than the height position H1 of the lower end 30d of the cross section of the heating unit 30 of the heater 3. Is set to Such a relationship is maintained over the length of the water inlet passage 66. For this reason, the water in the water inlet passage 66 is preheated by the hot water around the water inlet passage 66 in the hot water chamber 25. Further, it can be expected to be warmed by the heating part of the heater 3. For this reason, compared with the technique which concerns on patent document 1, the use efficiency of the warm water chamber 25 of the warm water tank 2 can be improved as much as possible, aiming at size reduction of the warm water tank 2. FIG. Therefore, it is possible to suppress the possibility that the cleaning time for the local cleaning becomes longer or the temperature of the hot water used for the local cleaning decreases even when the next user immediately performs the local cleaning following the previous user. can do.

  Further, according to the present embodiment, as shown in FIG. 3, the water supply device 5 includes an insertion water supply pipe 51 inserted into the water inlet 21i, a water supply pipe 52 communicated with the water supply system by a connection hose, and the discharge port. It is formed integrally with a relief valve 54 having 53 at the tip. In this case, it is possible to contribute to reducing the space where the plug-in water supply pipe 51, the water supply pipe 52, and the relief valve 54 are arranged.

(Embodiment 2)
FIG. 9 shows a second embodiment. Since this embodiment basically has the same configuration and the same function and effect as those of the first embodiment, FIGS. 1 to 3 can be applied mutatis mutandis. As shown in FIG. 9, in the vertical direction H, the height position H4 of the center C4 of the cross section of the water inlet passage 66 is set upward with respect to the height position H1 of the lower end 30d of the cross section of the heating unit 30 of the heater 3. ing. This is advantageous for preheating the water in the water inlet passage 66. Further, the height position H4 of the center C4 of the cross section of the water inlet passage 66 is set also higher than the height position H3 of the center C3 of the cross section of the heating unit 30 of the heater 3. Further, the height position H2 of the bottom surface 66d of the water inlet passage 66 is disposed above the lower end 30d of the cross section of the heating unit 30 and further above the center C3 of the cross section of the heating unit 30. Also in this embodiment, as shown in FIG. 9, 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 upper part of the heating unit 30 and the lower part of the water inlet passage 66 are The projections are arranged at such heights that they overlap each other.

  Also in the present embodiment, as shown in FIG. 9, an inclined wall portion 26 u that is inclined upward from the first bottom wall portion 26 f toward the second bottom wall portion 26 s is formed in the bottom wall portion 26 of the hot water tank 2. Yes. For this reason, when there is no active movement of warm water, such as when the local cleaning process is not performed, the temperature existing below the heating unit 30 and in the vicinity of the first bottom wall portion 26 minutes is relative. The low water WB is unlikely to move to the second bottom wall portion 26 side, that is, the water inlet passage 66 side due to the upward inclination of the inclined wall portion 26u. For this reason, it is possible to maintain the temperature of the water present around the water inlet passage 66 as high as possible, and to contribute to warming and preheating the water in the water inlet passage 66.

(Embodiment 3)
FIG. 10 shows a third embodiment. Since this embodiment basically has the same configuration and the same function and effect as those of the first embodiment, FIGS. 1 to 3 can be applied mutatis mutandis. As shown in FIG. 10, in the vertical direction H, the height position H4 of the center C4 of the cross section of the water inlet passage 66 is set upward with respect to the height position H1 of the lower end 30d of the cross section of the heating unit 30 of the heater 3. In addition, it is also set upward with respect to the height position H3 of the center C3 of the cross section of the heating unit 30. The height position H2 of the bottom surface 66d of the water inlet passage 66 is set to a height position that is substantially the same as the height position H1 of the lower end 30d of the section of the heating unit 30 of the heater 3.

(Other embodiments)
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. 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. In short, the height position H4 of the center C4 of the cross section of the water inlet passage 66 of the partition member 6 may be set to be the same as or higher than the height position H1 of the lower end 30d of the cross section of the heating unit 30 of the heater 3. . In some cases, the heater 3 and the temperature sensor 4 may be attached to the ceiling wall of the hot water tank 2.

  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. In short, the height position H4 of the center C4 of the cross section of the water inlet passage 66 of the partition member 6 may be set to be the same as or higher than the height position H1 of the lower end 30d of the cross section of the heating unit 30 of the heater 3. . 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 Embodiment 1 described above, both the heater 3 and the temperature sensor 4 are fastened together and fixed to the hot water tank 2 by the heater flange 33, but the heater 3 and the temperature sensor 4 may be fixed individually. 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 the description of this specification.

  (Additional Item 1) A hot water chamber for storing hot water for local washing, a bottom wall portion forming the bottom surface of the hot water chamber, a hot water tank having a recess formed in the bottom wall portion and partitioned to allow water to pass from the hot water chamber, and a hot water chamber A heater having a long heating portion that is arranged along the horizontal direction and faces the water in the hot water chamber, and a water passage portion that is arranged along the bottom wall portion of the hot water tank and guides the water to the recess. A hot water tank apparatus for local cleaning. The water passing portion can guide water to the concave portion along the bottom wall portion of the hot water tank.

  (Additional Item 2) A hot water chamber for storing hot water for local cleaning, a bottom wall portion forming the bottom surface of the hot water chamber, a hot water tank having a recess formed in the bottom wall portion and partitioned to allow water to pass from the hot water chamber, and a hot water chamber A heater having a long heating part arranged along the horizontal direction facing the water in the hot water chamber, and a water passage part arranged along the bottom wall part of the hot water tank and guiding the water to the recess, When projecting the heater heating section and the water inlet passage along the horizontal direction, the heater heating section and the water inlet passage are arranged at a height position where at least a part of the heating section and the water inlet passage overlap each other. A hot water tank device for local cleaning. When there is no active movement of hot water, such as when the local cleaning process is not performed, the warm water around the water inlet passage can preheat the water in the water inlet passage.

  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 sectional drawing which concerns on Embodiment 2 and shows the bottom wall part vicinity of a hot water tank. It is sectional drawing which concerns on Embodiment 3 and shows the bottom wall part vicinity of a hot water tank.

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, 23 is an upper tank, 25 is a hot water chamber, 26 is a bottom wall part, 26f is a first bottom wall part, 26s is a second bottom wall part, 26u Is an inclined wall portion, 27 is a recess, 3 is a heater, 30 is a heating unit, 30d is a lower end, 33 is a heater flange, 4 is a temperature sensor, 5 is a water supply tool, 51 is a water supply pipe, 52 is a water supply pipe, 53 Is a discharge valve, 54 is a relief valve, 6 is a partition member (water passage portion), 61 is a first partition wall portion, 62 is a second partition wall portion, 63 is a third partition wall portion, 64 is a pore, 66 is A water inlet passage 67 is a descending passage.

Claims (6)

A warm water chamber for storing warm water for local cleaning, a bottom wall portion forming a bottom surface of the warm water chamber, and a warm water tank having a recess formed in the bottom wall portion and partitioned to allow water to pass from the warm water chamber;
A heater having a heating portion arranged in a horizontal direction in the hot water chamber and having a long shape capable of facing the water of the hot water chamber;
A water passage portion disposed along the bottom wall portion of the hot water tank and guiding water from a water supply system toward the recess,
The water flow section includes a water inlet passage communicating with the water inlet of the hot water chamber so that water to be warm water is supplied, and water flowing down the water inlet passage from the water inlet passage toward the recess. A descending passage that flows into the recess,
In the vertical direction, the height position of the center of the cross section of the water inlet passage of the water flow section is set to be the same as or higher than the height position of the lower end of the cross section of the heating section of the heater. A hot water tank device for local cleaning.   2. The hot water tank according to claim 1, wherein the hot water tank has a heater insertion port for inserting the heating portion of the heater into the hot water chamber, and the inlet of the water inlet passage is formed on the same side as the heater insertion port in the hot water tank. A hot water tank device for local cleaning, characterized in that   In Claim 1 or 2, when projecting the heating part and the water intake passage of the heater along the horizontal direction from the direction perpendicular to the length direction of the heating part of the heater, the heating part of the heater and The hot water tank apparatus for local cleaning, wherein the water inlet passage is disposed at a height position where at least a part of the heating portion and the water inlet passage overlap each other.   The hot water for local cleaning according to claim 1, wherein, in a top view, the water inlet passage of the water flow portion runs parallel to the heating portion of the heater. Tank equipment.   5. The cross-section obtained by cutting the hot water tank along a vertical direction according to claim 1, wherein the bottom wall portion of the hot water tank is directly below the heating portion of the heater via a space. A first bottom wall portion located at the bottom, a second bottom wall portion forming a bottom surface of the water inlet passage of the water flow portion, and an upward slope from the first bottom wall portion toward the second bottom wall portion. A hot water tank apparatus for local cleaning, comprising an inclined wall portion. 6. The water passage portion according to claim 1, wherein the water passage portion is a partition member attached to the bottom wall portion of the hot water tank to partition the water inlet passage and the descending passage from the hot water chamber. Yes,
The partition member includes a first partition wall portion that partitions the water inlet passage from the hot water chamber, a second partition wall portion that partitions the descending passage from the hot water chamber, and covers the recess and the recess. A hot water tank apparatus for local cleaning, comprising: a third partition wall portion having a pore group composed of a plurality of pores communicating with the hot water chamber.

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