JP2016108844A - Heat exchanger of washing equipment for private part of human body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger of washing equipment for a private part of a human body that reduces costs not only for the heat exchanger, but also for the overall equipment.SOLUTION: A heat exchanger 30 of washing equipment for a private part of a human body is formed in a rod-shape extending along an axial line 31a, and includes: a heater 31 for heating washing water; a case 32 of a cylindrical form having openings 32b1, 32b2 on both ends, the case housing the heater 31 inside and provided with a fifth flow channel L5 through which the washing water circulates; a first cap 33 and a second cap 34 that respectively close the openings 32b1, 32b2 in a fluid-tight manner; an introduction pipe 35 formed integrally on either of the first cap 33 or the second cap 34, for introducing the washing water into the fifth flow channel L5; and a lead-out pipe formed integrally with the either of the first cap 33 or the second cap 34, for leading out the washing water from the fifth flow channel L5.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a heat exchanger for a local body cleaning apparatus.

  As a type of heat exchanger for a human body local cleaning device, one disclosed in Patent Document 1 is known. As shown in FIG. 1 of Patent Document 1, a heat exchanger of a human body local cleaning device is formed on a sheathed heater 7 for heating water, a cylindrical case 8 surrounding the sheathed heater 7, and an outer periphery of the sheathed heater 7. The flow path 9 is provided with an inlet 10 for taking water into the flow path 9 and an outlet 12 for taking out hot water of the flow path 9. The inflow port 10 and the outflow port 12 are joined to the case 8 by brazing, for example. Further, one end 13 of the case 8 is formed so as to be in close contact with the outer surface of the sheathed heater 7. One end 13 of the case 8 and the outer surface of the sheathed heater 7 are joined in a liquid-tight manner, for example, by brazing. A spacer 15 is inserted into the gap between the other end 14 of the case 8 and the outer surface of the sheathed heater 7. The spacer 15 is liquid-tightly joined to the case 8 and the sheathed heater 7 by, for example, brazing. Thus, the heat exchanger of patent document 1 is ensuring the heat resistance and liquid-tightness by being formed in the integral structure which eliminated members, such as packing with low heat resistance.

JP 2008-57855 A

  However, in the heat exchanger of the human body local washing apparatus shown in Patent Document 1, the shape of the joint portion is different between the one end 13 and the other end 14 of the case 8, and therefore the work content during assembly is different. Moreover, since the inflow port 10 and the outflow port 12 and the case 8 are formed separately, the number of joints increases as compared to the case where they are formed integrally. On the other hand, there is a demand for cost reduction of the heat exchanger and thus the human body local cleaning device.

  Therefore, the present invention has been made to solve the above-described problems, and an object of the present invention is to reduce the cost of the heat exchanger, and thus the entire apparatus, in the heat exchanger of the human body local cleaning device.

  In order to solve the above problems, a heat exchanger for a human body local cleaning apparatus according to claim 1 is a heat exchanger for a human body local cleaning apparatus that heats cleaning water for cleaning a local part of the human body, along the axial direction. Formed in the shape of a rod that extends, and has a heater that heats the cleaning water, a cylindrical shape that has openings at both ends and an inner diameter that is larger than the outer diameter of the heater. A case provided with a flow path for storing and flowing washing water, a first cap and a second cap that liquid-tightly close both openings, and one of the first cap and the second cap And an introduction pipe that introduces cleaning water into the flow path, and a lead-out pipe that is formed integrally with either the first cap or the second cap and leads out the cleaning water from the flow path.

  According to this, since the introduction pipe and the lead-out pipe are formed integrally with the cap, the number of joints is smaller than when each pipe is formed separately from the cap. In addition, by making the shape of the joint portion between each cap and the case, for example, the same shape, the joint between each cap and the case can be easily performed as compared with the case where the shape of the joint portion is different. Therefore, it is possible to reduce the cost of the heat exchanger and thus the entire apparatus.

1 is a schematic diagram showing an overall configuration of a human body local cleaning device according to a first embodiment of the present invention. It is a perspective view of the heat exchanger shown in FIG. It is a longitudinal cross-sectional view of the heat exchanger shown in FIG. It is sectional drawing along the IV-IV line of the heat exchanger shown in FIG. It is sectional drawing along the VV line of the heat exchanger shown in FIG. It is sectional drawing along the VI-VI line of the heat exchanger shown in FIG. It is a perspective view of the heat exchanger which concerns on 2nd embodiment of this invention. It is a longitudinal cross-sectional view of the heat exchanger which concerns on the modification of each embodiment of this invention. It is sectional drawing along the IX-IX line of the heat exchanger shown in FIG. It is sectional drawing along the XX line of the heat exchanger shown in FIG. It is sectional drawing along the XI-XI line of the heat exchanger shown in FIG.

  1st Embodiment in the heat exchanger of the human body local cleaning apparatus 1 which concerns on this invention is described, referring drawings. The human body local cleaning apparatus 1 cleans the local body by ejecting cleaning water. As shown in FIG. 1, the human body local washing apparatus 1 includes an operation unit 10, a warm water function unit 20, and a toilet seat and a toilet lid (both not shown) that are rotatably supported by the warm water function unit 20. The operation unit 10 is for remotely operating the human body local cleaning device 1. The operation unit 10 includes a plurality of switches (not shown) for operating the human body local cleaning device 1. The operation unit 10 wirelessly transmits a predetermined control signal to the hot water function unit 20 when the user operates the switch.

  The hot water function unit 20 includes a branch faucet 20a, a strainer 20b, a check valve 20c, a constant flow valve 20d, a water stop solenoid valve 20e, a relief valve 20f, a flow sensor 20g, a first temperature sensor 20h, a second temperature sensor 20i, A heat exchanger 20j (30), a pump 20k, a flow path switching valve 20m, a nozzle unit 20n, and a control unit 20p are provided. In addition, the nozzle unit 20n includes a butt nozzle 20n1 that ejects cleaning water for performing butt cleaning, and a bidet nozzle 20n2 that ejects cleaning water for performing bidet cleaning.

  Moreover, the warm water function part 20 is further provided with the 1st flow path L1, the 2nd flow path L2, the 3rd flow path L3, and the 4th flow path L4 through which wash water distribute | circulates. The first flow path L1 is a flow path that connects the branch faucet 20a and the heat exchanger 20j. In the first flow path L1, a strainer 20b, a check valve 20c, a constant flow valve 20d, a water stop solenoid valve 20e, a relief valve 20f, a flow sensor 20g, and a first temperature sensor 20h are arranged in this order from the branch tap 20a. ing. The second flow path L2 is a flow path that connects the heat exchanger 20j and the flow path switching valve 20m. In the second flow path L2, a second temperature sensor 20i and a pump 20k are disposed in order from the heat exchanger 20j. The third flow path L3 is a flow path that connects the flow path switching valve 20m and the buttocks nozzle 20n1. The fourth flow path L4 is a flow path that connects the flow path switching valve 20m and the bidet nozzle 20n2.

  The control unit 20p is electrically connected to the water stop solenoid valve 20e, the flow rate sensor 20g, the temperature sensors 20h and 20i, the heat exchanger 20j, the pump 20k, and the flow path switching valve 20m. Based on the control signal wirelessly transmitted from the operation unit 10, the control unit 20p detects the water stop solenoid valve 20e, the heat exchanger 20j, the pump 20k, and the flow path switching from the detection signals of the flow rate sensor 20g and the temperature sensors 20h and 20i. A predetermined control signal is transmitted to the valve 20m to control the hot water function unit 20.

  The branch faucet 20a is attached to the water pipe 2 and introduces the clean water flowing through the water pipe 2 into the first flow path L1 as washing water. The strainer 20b removes dust and the like contained in clean water. The check valve 20c allows the flow of washing water from the branch tap 20a to the heat exchanger 20j, but restricts the flow in the reverse direction. The constant flow valve 20d maintains a constant flow rate of the cleaning water flowing through the first flow path L1. The water stop solenoid valve 20e opens or closes the first flow path L1 by a control signal from the control unit 20p. In the present embodiment, the water stop solenoid valve 20e closes the first flow path L1 at the normal time (non-control time). The relief valve 20f discharges the wash water that is not sucked by the pump 20k out of the wash water whose flow rate is adjusted by the constant flow valve 20d from the hot water function unit 20.

  The flow rate sensor 20g detects the flow rate of the cleaning water flowing through the first flow path L1 (particularly, the flow rate at the place where the flow rate sensor 20g is installed (flow rate per unit time)). The flow rate of the wash water detected by the flow rate sensor 20g is transmitted to the control unit 20p as a detection signal. The first temperature sensor 20h detects the temperature of the cleaning water flowing through the first flow path L1 (particularly the temperature at the place where the first temperature sensor 20h is installed). And the 2nd temperature sensor 20i detects the temperature (especially temperature of the installation place of the 2nd temperature sensor 20i) which flows into the 2nd flow path L2. The temperature of the wash water detected by the temperature sensors 20h and 20i is transmitted to the control unit 20p as a detection signal.

  The heat exchanger 20j (30) heats washing water for washing local parts of the human body. The heat exchanger 20j heats the temperature of the cleaning water introduced from the first flow path L1 to a predetermined temperature based on a control signal from the control unit 20p. The predetermined temperature is 39 ° C., for example. The pump 20k introduces the wash water heated by the heat exchanger 20j and guides it to the flow path switching valve 20m via the second flow path L2. In the present embodiment, the pump 20k is a plunger pump, and includes a motor and a plunger (both not shown) that reciprocates by the rotational drive of the motor. Further, the pump 20k adjusts the flow rate of the cleaning water led out to the flow path switching valve 20m based on a control signal from the control unit 20p. Specifically, the flow rate of the cleaning water is adjusted by adjusting the number of rotations of the motor of the pump 20k by the control unit 20p.

  The flow path switching valve 20m selectively switches out the washing water from the pump 20k to one of the third flow path L3 and the fourth flow path L4. The flow path switching valve 20m is, for example, a three-way valve. The washing water led out to the third flow path L3 is ejected from the buttocks nozzle 20n1. Moreover, the wash water led out to the fourth flow path L4 is ejected from the bidet nozzle 20n2.

  Next, the configuration of the heat exchanger 30 will be described in detail. As shown in FIGS. 2 and 3, the heat exchanger 30 includes a heater 31, a case 32, a first cap 33, a second cap 34, an introduction pipe 35, and a lead-out pipe 36.

  The heater 31 is formed in a rod shape extending in the direction of the axis 31a of the heater 31 and heats the cleaning water. The heater 31 is a sheathed heater. The heater 31 includes a copper tube sheath 31b, a heat generating portion 31c provided inside the sheath 31b, an insulator 31d filled around the heat generating portion 31c, and a terminal 31e electrically connected to the heat generating portion 31c. Yes. The heat generating part 31c is a heater wire formed of, for example, nickel chrome. The insulator 31d is, for example, magnesium oxide powder. Heat generated by energizing the heat generating portion 31c is transmitted to the surface of the sheath 31b via the insulator 31d.

The case 32 is formed of a metal such as aluminum, and includes an inner cylinder 32a, an outer cylinder 32b, and a side wall 32c.
The inner cylinder 32a is formed in a cylindrical shape having openings 32a1 and 32a2 at both ends. The inner cylinder 32a is formed so as to extend along the direction of the axis 31a. The inner cylinder 32 a is set so that the inner diameter is larger than the outer diameter of the heater 31. The inner cylinder 32a houses the heater 31 therein. It fixes so that at least one part of the outer peripheral surface of the heater 31 may contact the inner peripheral surface of the inner cylinder 32a. Specifically, when the heater 31 is press-fitted into the inner peripheral surface of the inner cylinder 32a or the inner cylinder 32a is compressed in the radial direction, the inner peripheral surface of the inner cylinder 32a and the outer peripheral surface of the heater 31 come into contact with each other. The inner cylinder 32a and the heater 31 are fixed. Thereby, the heat of the heater 31 is transmitted to the entire case 32 via the inner cylinder 32a.

  The outer cylinder 32b is formed in a cylindrical shape having openings 32b1 and 32b2 at both ends. The outer cylinder 32b is formed so as to extend along the direction of the axis 31a. The outer cylinder 32 b is set so that the inner diameter is larger than the outer diameter of the heater 31. Specifically, the outer cylinder 32b is disposed so as to surround the inner cylinder 32a, and the inner surface of the outer cylinder 32b and the outer surface of the inner cylinder 32a are opposed to each other with a space therebetween. The space between the inner side surface of the outer cylinder 32b and the outer side surface of the inner cylinder 32a constitutes a part of a fifth flow path L5 (described later) through which cleaning water flows. As described above, the case 32 has the openings 32 a 1, 32 a 2, 32 b 1 and 32 b 2 at both ends, respectively, and the inner diameter (the inner diameter of the inner cylinder 32 a and the inner diameter of the outer cylinder 32 b) is larger than the outer diameter of the heater 31. A fifth flow path L5 that is formed in a cylindrical shape and that accommodates the heater 31 and circulates cleaning water is provided.

  The side wall 32c includes four side walls 32c1 to 32c4 that equally divide the space between the outer side surface of the inner cylinder 32a and the inner side surface of the outer cylinder 32b (fifth flow path L5) into four in the circumferential direction (see FIG. 4). The side walls 32c1 to 32c4 are formed so as to extend along the axis 31a between the left end surface and the right end surface of the outer cylinder 32b.

  The first cap 33 is made of a metal such as aluminum, for example, and liquid-tightly closes the opening 32b1 on the left side of the outer cylinder 32b in FIG. Specifically, the first cap 33 is formed in a cylindrical shape having the same diameter as the outer cylinder 32b and opening on the right side in FIG. 3, and the right end surface of the first cap 33 and the left end surface of the outer cylinder 32b are welded. So that it is liquid-tightly joined. Further, a through hole 33a through which the inner cylinder 32a passes is formed in the left side wall of the first cap 33, and the inner peripheral surface of the through hole 33a and the outer peripheral surface of the inner cylinder 32a are welded together in a liquid-tight manner. Has been. Further, the space inside the first cap 33 constitutes a part of a fifth flow path L5 described later.

  The first cap 33 is further provided with a side wall 33b as shown in FIG. The side wall 33b has three side walls 33b1 to 33b3. The three side walls 33b1 to 33b3 are formed to extend between the right end surface of the first cap 33 and the inner surface of the left side wall along the direction of the axis 31a. The three side walls 33b1 to 33b3 extend from the inner peripheral surface of the first cap 33 toward the radially inner side, and are formed so that the radially inner end surface is in liquid-tight contact with the outer peripheral surface of the inner cylinder 32a. Has been. The right end surface of the first side wall 33b1 is the left end surface of the first side wall 32c1 of the case 32, the right end surface of the second side wall 33b2 is the left end surface of the third side wall 32c3, and the right end surface of the third side wall 33b3 is the fourth side wall. It is formed on the left end face of 32c4 so as to be in liquid-tight contact with each other. As described above, the first cap 33 is not formed with a side wall that contacts the left end surface of the second side wall 32 c 2 of the case 32.

  The second cap 34 is formed of a metal such as aluminum, for example, and seals the opening 32b2 on the right side of the outer cylinder 32b in FIG. 3 in a liquid-tight manner. Specifically, the second cap 34 is formed in a cylindrical shape similar to the first cap 33, and opens on the left side of FIG. And the left end surface of the 2nd cap 34 and the right end surface of the outer cylinder 32b are joined fluid-tightly, for example by welding. Further, a through hole 34a is formed on the right side wall of the second cap 34 in the same manner as the first cap 33, and the inner peripheral surface of the through hole 34a and the outer peripheral surface of the inner cylinder 32a are welded, for example, to make the liquid tight. Are joined. The space inside the second cap 34 constitutes a part of a fifth flow path L5 described later.

  The second cap 34 is further provided with a side wall 34b as shown in FIG. The side wall 34b has two side walls 34b1 and 34b2. The two side walls 34b1 and 34b2 are formed to extend between the left end surface of the second cap 34 and the inner surface of the right side wall along the direction of the axis 31a. The two side walls 34b1 and 34b2 extend from the inner peripheral surface of the second cap 34 toward the radially inner side, and are formed so that the radially inner end surface is in liquid-tight contact with the outer peripheral surface of the inner cylinder 32a. Has been. Further, the left end surface of the first side wall 34b1 is formed in liquid-tight contact with the right end surface of the second side wall 32c2 of the case 32, and the left end surface of the second side wall 34b2 is formed in liquid-tight contact with the right end surface of the fourth side wall 32c4. Yes. As described above, the second cap 34 is not formed with the side wall contacting the left end surfaces of the side walls 32c1 and 32c3 of the case 32.

The fifth flow path L5 (corresponding to the flow path of the present invention) is an inner peripheral surface of the outer cylinder 32b of the case 32, an inner surface of the first cap 33 and the second cap 34, and an outer peripheral surface of the inner cylinder 32a of the case 32. It is formed in a space provided between them.
As shown in FIGS. 4 to 6, the fifth flow path L5 is formed so as to be partitioned by the side walls 32c, 33b, and 34b, and has four straight portions SL1 to SL4 extending in the direction of the axis 31a. Furthermore, the fifth flow path L5 includes a first connection portion C1 that connects the first straight portion SL1 and the second straight portion SL2, and a second connection portion that connects the second straight portion SL2 and the third straight portion SL3. C2, and a third connecting portion C3 that connects the third straight portion SL3 and the fourth straight portion SL4. As shown in FIG. 6, the first connection portion C <b> 1 is an upper left space partitioned by the side wall 34 b and the inner cylinder 32 a inside the second cap 34. As shown in FIG. 5, the second connection portion C2 is a space on the lower left side partitioned by the first side wall 33b1, the inner cylinder 32a, and the second side wall 33b2 inside the first cap 33. As shown in FIG. 6, the third connection portion C <b> 3 is a lower right space partitioned by the side wall 34 b and the inner cylinder 32 a inside the second cap 34. In addition, the connection parts C1-C3 are equivalent to the folding | turning part of this invention.

  As shown in FIG. 3, the introduction pipe 35 is formed integrally with the first cap 33 and introduces cleaning water into the fifth flow path L5. The introduction pipe 35 is formed on the left side wall of the first cap 33 along the direction of the axis 31a. One end of the introduction pipe 35 is connected to the first flow path L1. The other end of the introduction pipe 35 is connected to the first straight portion SL1 of the fifth flow path L5.

  The outlet pipe 36 is formed integrally with the first cap 33 and guides the washing water from the fifth flow path L5. The outlet tube 36 is formed on the left side wall of the first cap 33 along the direction of the axis 31a. One end of the outlet pipe 36 is connected to the fourth straight line portion SL4 of the fifth flow path L5. The other end of the outlet pipe 36 is connected to the second flow path L2.

  Next, the flow of cleaning water in the heat exchanger 30 in the first embodiment described above will be described. When the user of the human body local cleaning device 1 performs, for example, a butt cleaning, by operating the operation unit 10, the water shutoff electromagnetic valve 20 e opens the first flow path L <b> 1, thereby cleaning the water pipe 2. Water is introduced into the heat exchanger 30 via the first flow path L1.

The washing water from the first flow path L1 is introduced into the first straight portion SL1 of the fifth flow path L5 through the introduction pipe 35. The washing water flows through the first straight portion SL1 in the direction of the axis 31a from the left side to the right side in FIG. 3 toward the first connection portion C1, and flows into the second straight portion SL2 through the first connection portion C1. At this time, the flow direction of the cleaning water is turned back, and the cleaning water flows through the second straight portion SL2 from the right side to the left side in FIG. 3 toward the second connection portion C2. Further, the wash water flows back to the third straight portion SL3 with the flow direction turned back at the second connection portion C2. Further, the washing water flows through the third straight portion SL3 toward the third connecting portion C3, the flow direction is turned back at the third connecting portion C3, and flows into the fourth straight portion SL4. Then, the wash water is led out from the fourth straight portion SL4 to the second flow path L2 through the lead-out pipe 36. In this way, the fifth flow path L5 meanders by alternately connecting the straight portions SL1 to SL4 that circulate the cleaning water in the direction of the axis 31a and the connection portions C1 to C3 that turn back the flowing direction of the cleaning water. It is formed in a shape.
In addition, since the heat from the heater 31 is transmitted to the entire case 32, the cleaning water is heated when it flows through the fifth flow path L5.

According to the first embodiment, the heat exchanger 30 of the human body local cleaning device 1 is the heat exchanger 30 of the human body local cleaning device 1 that heats the cleaning water for cleaning the local part of the human body, in the direction of the axis 31a. It is formed in a rod shape that extends along the heater 31, and has a heater 31 that heats the cleaning water, and a cylindrical shape that has openings 32 b 1 and 32 b 2 at both ends, and the inner diameter is set larger than the outer diameter of the heater 31. And the case 32 provided with the fifth flow path L5 through which the washing water is circulated and the first cap 33 and the second cap for liquid-tightly closing both the openings 32b1 and 32b2, respectively. 34, formed integrally with the first cap 33 and introducing the cleaning water into the fifth flow path L 5, and formed integrally with the first cap 33, and the cleaning water is led out from the fifth flow path L 5. Outlet tube 36 , And a.
According to this, since the introduction pipe 35 and the lead-out pipe 36 are formed integrally with the first cap 33, the pipes 35 and 36 are formed separately from the caps 33 and 34. Compared with fewer joints. Further, by making the shape of the joint portion of each cap 33, 34 with the case 32, for example, the same shape, the joining of each cap 33, 34 and the case 32 can be simplified compared to the case where the shape of the joint portion is different. Can be done. Therefore, it is possible to reduce the cost of the heat exchanger 30 and thus the entire apparatus.

The introduction pipe 35 and the lead-out pipe 36 are formed along the direction of the axis 31a.
When the introduction pipe 35 (outlet pipe 36) is formed along the direction of the axis 31a, the flow path is smaller than when the introduction pipe 35 (outlet pipe 36) is formed along the direction toward the axis 31a. Since it is not bent, the pressure loss of the flow path is reduced. In this case, since the fifth flow path L5 can be formed to reduce the flow path length or the cross-sectional area of the flow path, the heat exchanger 30 can be downsized. Moreover, when wash water is pumped by the pump 20k as in this embodiment, the power of the pump 20k can be reduced. By these, the cost reduction of the heat exchanger 30 and by extension the whole apparatus can be achieved.

Further, the fifth flow path L5 is formed in a meandering shape having alternating straight portions SL1 to SL4 for flowing the cleaning water in the direction of the axis 31a and connecting portions C1 to C3 for turning back the flowing direction of the cleaning water in the opposite direction. Has been.
According to this, when the cleaning water flows in one direction along the direction of the axis 31 a from one end of the heater 31 to the other end as in the conventional heat exchanger 30, As the temperature of the cleaning water increases toward the end, the heat transfer coefficient at the other end of the heater 31 is relatively low. As a result, the temperature of the outer surface of the other end of the heater 31 becomes relatively high, so that the durability of the heater 31 may be reduced. On the other hand, in this embodiment, since the wash water flows so as to meander between the both ends of the heater 31, a decrease in the heat transfer coefficient at the end of the heater 31 is suppressed. Therefore, since the temperature rise of the outer surface of the heater 31 can be suppressed, a decrease in the durability of the heater 31 can be suppressed.

  Next, the second embodiment of the heat exchanger 30 according to the present invention will be described with reference to FIG. In the first embodiment described above, the introduction pipe 35 and the outlet pipe 36 are formed along the direction of the axis 31a, but in the second embodiment, they are formed along the direction toward the axis 31a. . Specifically, the introduction pipe 35 and the lead-out pipe 36 are formed along a direction perpendicular to the axis 31a. The introduction pipe 35 and the lead-out pipe 36 are formed integrally with the first cap 33 on the peripheral side wall of the first cap 33. As in the first embodiment described above, the introduction pipe 35 is connected to the first straight line portion SL1 of the first flow path L1 and the fifth flow path L5, and the lead-out pipe 36 is the fourth straight line of the fifth flow path L5. The part SL4 and the second flow path L2 are connected.

According to the second embodiment, the introduction pipe 35 and the lead-out pipe 36 are formed along the direction toward the axis 31a.
When the introduction pipe 35 (lead-out pipe 36) is formed in the direction of the axis 31a, the flow path is bent compared to when the introduction pipe 35 (lead-out pipe 36) is formed along the direction of the axis 31a. As a result, the flow of cleaning water is disturbed. Thereby, since the washing water is agitated, the heat transfer rate from the heater 31 to the washing water is improved. Therefore, since the length of the fifth flow path L5 can be shortened, the heat exchanger 30 can be downsized. Therefore, it is possible to reduce the cost of the heat exchanger 30 and thus the entire apparatus.

  Next, with respect to the modified example of each embodiment described above, portions different from each embodiment will be mainly described with reference to FIGS. In each of the above-described embodiments, the space inside the case 32 is equally divided into four in the circumferential direction. Instead, in this modification, the space inside the case 32 is arranged in the circumferential direction. It is equally divided into three. Specifically, as shown in FIG. 9, the side wall 132c of the case 32 has a space (fifth flow path L5) between the outer surface of the inner cylinder 32a and the inner surface of the outer cylinder 32b equally 3 in the circumferential direction. Three side walls 132c1 to 132c3 are provided for partitioning. The side walls 132c1 to 132c3 are formed to extend along the axis 31a between the left end surface and the right end surface of the outer cylinder 32b.

  Further, as shown in FIG. 10, the first cap 33 has two side walls 133b1 and 133b2. In the case 32 and the first cap 33, the left end surface of the first side wall 132c1 is in liquid-tight contact with the right end surface of the first side wall 133b1, and the left end surface of the third side wall 132c3 is in liquid-tight contact with the right end surface of the second side wall 133b2. Each is formed. The first cap 33 is not formed with a side wall that contacts the second side wall 132c2. Further, as shown in FIG. 11, the second cap 34 has two side walls 134b1 and 134b2. In the case 32 and the second cap 34, the right end surface of the second side wall 132c2 is in liquid-tight contact with the left end surface of the first side wall 134b1, and the right end surface of the third side wall 132c3 is in liquid-tight contact with the left end surface of the second side wall 134b2. Each is formed. The second cap 34 is not formed with a side wall that contacts the first side wall 132c1. Thus, by forming each side wall, as shown in FIG. 9 thru | or FIG. 11, in the 5th flow path L5, three linear part SL11-SL13 extended in the direction of the axis 31a and the inside of the 2nd cap 34 are provided. A first connecting portion C11 (see FIG. 11) that connects the first straight portion SL11 and the second straight portion SL12, and a second connecting portion that connects the second straight portion SL12 and the third straight portion SL13 inside the first cap 33. A two-connection portion C12 (see FIG. 10) is formed.

  The introduction pipe 135 is formed integrally with the first cap 33 and is connected to the first flow path L1 and the first straight portion SL11. The outlet pipe 136 is formed integrally with the second cap 34, and connects the third straight portion SL13 and the second flow path L2. As described above, the fifth flow path L5 is meandered by alternately connecting the straight portions SL11 to SL13 for flowing the cleaning water in the direction of the axis 31a and the connecting portions C11 and C12 for turning back the flowing direction of the cleaning water. It is formed in a shape. In FIG. 8, the introduction pipe 135 and the outlet pipe 136 are formed along the direction of the axis 31a. However, the introduction pipe 135 and the outlet pipe 136 may be formed along the direction toward the axis 31a. .

According to this modification, when an odd number of linear portions of the fifth flow path L5 are formed, the introduction pipe 135 and the outlet pipe 136 are formed in different caps, and therefore the shapes of both caps 33 and 34 are changed. Can be the same. In this case, the cost of each cap 33 and 34 can be reduced compared with the case where the shape of both the caps 33 and 34 differs. Therefore, it is possible to reduce the cost of the heat exchanger 30 and thus the entire apparatus.
Further, when an even number of linear portions of the fifth flow path L5 are formed, the introduction pipe 35 and the outlet pipe 36 are one of the first cap 33 and the second cap 34 (in the above-described embodiments, the first cap 33). ). Thus, since the position where the introduction pipe 35 and the outlet pipe 36 are formed can be changed by changing the number of straight portions of the fifth flow path L5, the heat exchanger 30 is arranged in the apparatus. The degree of freedom of position can be improved. As described above, the introduction pipe 35 is formed integrally with one of the first cap 33 and the second cap 34. Further, the outlet tube 36 is formed integrally with one of the first cap 33 and the second cap 34.

In addition, in embodiment mentioned above, although an example of the heat exchanger of the human body local cleaning apparatus was shown, this invention is not limited to this, Other structures can also be employ | adopted. For example, the introduction pipe 35 and the outlet pipe 36 are both formed along the direction of the axis 31a. Instead, one of the introduction pipe 35 and the outlet pipe 36 is formed along the direction toward the axis 31a. You may make it. That is, at least one of the introduction pipe 35 and the outlet pipe 36 may be formed along the direction of the axis 31a. In the second embodiment described above, the introduction pipe 35 and the lead-out pipe 36 are both formed along the direction toward the axis 31a. Instead, one of the lead-in pipe 35 and the lead-out pipe 36 is connected to the axis. It may be formed along the direction 31a. That is, at least one of the introduction pipe 35 and the outlet pipe 36 may be formed along a direction toward the axis 31a.
According to this, when the introduction pipe 35 and the lead-out pipe 36 are formed separately from the case 32 or the caps 33 and 34 as in the prior art, the positions or directions of the lead-in pipe 35 and the lead-out pipe 36 are changed. For this purpose, it is necessary to change the shape of the joint. On the other hand, in the heat exchanger 30 of the human body local cleaning device 1 of the present invention, by providing caps having different positions or directions of the introduction pipe 35 and the outlet pipe 36, the introduction pipe 35 and The position or direction of the outlet tube 36 can be changed easily. Therefore, the freedom degree of the position which arrange | positions the heat exchanger 30 in an apparatus can be improved simply.

In the above-described embodiment, the heater 31 is a sheathed heater. However, instead of this, the heater 31 may be a ceramic heater.
In the above-described embodiment, the case 32 is formed in a cylindrical shape. However, instead of this, the case 32 may be formed in a rectangular tube.

In the above-described embodiment, the case 32 and the caps 33 and 34 are formed with side walls. Alternatively, the case 32 and the caps 33 and 34 may not be formed with side walls. . In this case, the fifth flow path L5 is not formed in a meandering shape.
In the above-described embodiment, the case 32 includes the inner cylinder 32a. However, instead of this, the case 32 may not include the inner cylinder 32a. In this case, the fifth flow path L5 is formed in a space between the inner surface of the outer cylinder 32b and the inner surfaces of the caps 33 and 34 and the outer peripheral surface of the heater 31.
In addition, the number of straight portions constituting the fifth flow path L5, the number and positions of the side walls, the positions where the introduction pipes 35 and the lead-out pipes 36 are disposed, and the like are changed without departing from the scope of the present invention. Also good.

  DESCRIPTION OF SYMBOLS 1 ... Human body local-part washing apparatus, 10 ... Operation part, 20 ... Hot water function part, 20j (30) ... Heat exchanger, 31 ... Heater, 31a ... Axis, 32 ... Case, 32a ... Inner cylinder, 32a1, 32a2, 32b1, 32b2 ... Opening part, 32b ... Outer cylinder, 32c ... Side wall, 33 ... First cap, 33b ... Side wall, 34 ... Second cap, 34b ... Side wall, 35 ... Introducing pipe, 36 ... Leading pipe, C1 ... First connecting part (Folding part), C2 ... second connection part (folding part), C3 ... third connection part (folding part), L5 ... fifth flow path (flow path), SL1 ... first straight part, SL2 ... second straight part , SL3 ... third straight part, SL4 ... fourth straight part.

Claims (4)

A heat exchanger of a human body local cleaning device that heats cleaning water for cleaning a local part of the human body,
A heater formed in a rod shape extending along the axial direction, and heating the washing water;
Each of the two ends has an opening and is formed in a cylindrical shape whose inner diameter is set to be larger than the outer diameter of the heater. The flow path for accommodating the heater and flowing the cleaning water therein is provided. A provided case, and
A first cap and a second cap for liquid-tightly closing both the openings;
An introduction pipe that is integrally formed with either the first cap or the second cap and introduces the washing water into the flow path;
A heat exchanger for a human body local cleaning apparatus, comprising: a discharge pipe that is integrally formed with one of the first cap and the second cap and that extracts the cleaning water from the flow path.   The heat exchanger for a human body local cleaning apparatus according to claim 1, wherein at least one of the introduction pipe and the outlet pipe is formed along the axial direction.   The heat exchanger for a human body local cleaning device according to claim 1, wherein at least one of the introduction pipe and the outlet pipe is formed along a direction toward an axis of the heater.   The flow path is formed in a meandering shape by alternately connecting a straight portion that circulates the cleaning water in the axial direction and a folded portion that folds the flow direction of the cleaning water in the opposite direction. The heat exchanger for a human body local cleaning apparatus according to any one of claims 1 to 3.

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