JP2014227698A - Heat exchange unit and human body private part washing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchange unit which has a branched section in the middle of a flow passage and prevents a foreign matter from accumulating at the branched section and to provide a human body private part washing device mounted with the heat exchange unit.SOLUTION: A heat exchange unit 1 comprises: a fluid container 10 including a flow passage C through which fluid flows; and heating means 12 which is installed in the fluid container 10 and heats the fluid flowing in the flow passage C. The flow passage C has: a main flow passage C1 and a branched flow passage C2 branching from a bifurcation 17 in the middle of the main flow passage C1. The bifurcation 17 has a foreign matter elimination member to eliminate a foreign matter from the branched flow passage C2. The foreign matter elimination member is preferably: an agitating member 41 which enhances a flow of the fluid in the branched flow passage C2 through rotation thereof; or a mesh member which covers the bifurcation 17 and prevents the foreign matter from entering the branched flow passage C2.

Description

  The present invention relates to a heat exchange unit and a human body local cleaning device, and more particularly to a heat exchange unit that heats a fluid and a human body local cleaning device including such a heat exchange unit.

  In a heat exchange unit that is provided in a human body local cleaning device or the like and supplies hot water heated to a predetermined temperature, a heat transfer plate (heat radiating plate) made of a material having high thermal conductivity such as metal is provided in the water flow path. A configuration is known in which an electronic component that generates heat, such as a triac, is brought into close contact with the heat transfer plate and is brought into contact with water flowing through the flow path. Then, the electronic component is effectively cooled by the water flowing through the flow path. For example, Patent Document 1 discloses a configuration in which a triac (64) is fixed to a heat radiating plate (64a) (see FIG. 18 in Patent Document 1).

JP 2001-132061 A

  In order to uniformly heat the water flowing through the flow path, it is better to avoid the water flow path from suddenly expanding or narrowing along the way. For that purpose, when providing a heat-transfer plate in a flow path, it is necessary to match a heat-transfer plate with the shape of a flow path. That is, when the cross section of the flow path is circular, it is necessary to bend the heat transfer plate made of a metal plate or the like into a circular arc cross section. When the heat transfer plate is bent in this way, it becomes difficult to ensure the sealing property with the main body of the heat exchange unit. In addition, the production of the heat transfer plate itself and the sealing between the main body portion require costs.

  Therefore, as shown in FIG. 8, in the heat exchange unit 90, it can be considered that the flow path C1 is branched in the middle, and a heat transfer plate 91 is provided on the wall surface of the branched flow path C2. Then, the heat transfer plate 91 can be configured as a simple flat surface, and the sealing performance with the main body can be easily ensured. However, in this case, the branch flow path C2 is in a bag path shape. If the branch flow path C2 has such a shape, the water flow W in the branch flow path C2 is stagnated, and there is a possibility that the foreign matter I contained in the water will accumulate in the branch flow path C2. Then, there is a possibility that the flow path is blocked or the cooling efficiency of the electronic component 92 on the heat transfer plate 91 is lowered.

  The problem to be solved by the present invention is to provide a heat exchange unit in which a foreign substance is prevented from accumulating in the branch portion in the heat exchange unit provided with a branch in the middle of the flow path, and such An object of the present invention is to provide a human body local cleaning device having a heat exchange unit.

  In order to solve the above-described problems, a heat exchange unit according to the present invention includes a fluid container having a flow path through which a fluid flows, and a heating unit that is provided inside the fluid container and heats the fluid that flows through the flow path. The flow path has a main flow path and a branch flow path that branches from a branch portion in the middle of the main flow path, and the branch portion has a foreign object removal that removes foreign substances from the branch flow path. The gist is that the member is provided.

  Here, the foreign matter exclusion member is a stirring member that promotes the flow of fluid in the branch flow channel by rotation, or a mesh member that covers the branch portion and prevents foreign matter from entering the branch flow channel. preferable.

  The gist of a human body local cleaning device according to the present invention is to supply hot water heated by the heat exchange unit as described above for human body local cleaning.

  In the heat exchange unit according to the present invention, the foreign matter is not easily retained in the branch flow path by the foreign matter removing member provided at the branch portion. This prevents foreign matter from accumulating in the branch flow path. Then, the blockage of the flow path due to the accumulation of foreign matters is avoided. In addition, when a heat transfer plate is provided on the wall surface of the branch flow path and the heat-generating electronic components that are in close contact with the heat transfer plate are cooled by the fluid flowing in the flow path, the cooling efficiency is reduced by the foreign matter accumulated in the branch flow path. Decrease is prevented.

  Here, when the foreign matter exclusion member is a stirring member that promotes the flow of the fluid in the branch flow path by rotation, the foreign matter is mixed without flowing in the branch flow path. It is difficult to stay in the flow path and is effectively excluded from the branch flow path. In addition, when the foreign matter removing member is a mesh member that covers the branching portion and prevents foreign matter from entering the branch flow path, the foreign matter larger than the mesh cannot enter the branch flow path, which is effective. Are excluded from the branch flow path.

  Since the human body local cleaning apparatus according to the present invention has the heat exchange unit as described above, it is stable without being affected by foreign matter accumulation in the branch flow path in the heat exchange unit, such as blockage of the flow path. It can be used comfortably.

It is a side surface which shows the external appearance of the heat exchange unit concerning 1st embodiment of this invention. It is the schematic of the AA cross section of the heat exchange unit concerning the said embodiment. It is a figure which shows an impeller unit, (a) is a disassembled perspective view, (b) is a perspective view after an assembly. It is a disassembled perspective view which shows the structure of the heat exchanger plate vicinity. It is BB sectional drawing of the heat exchange unit concerning 1st embodiment. It is the schematic corresponding to the AA cross section of the heat exchange unit concerning 2nd embodiment of this invention. (A) It is a perspective view of a mesh unit. (B) It is a figure equivalent to the BB cross section of the heat exchange unit concerning 2nd embodiment. It is a schematic sectional drawing of the heat exchange unit which has a conventional general branch channel.

  Hereinafter, a heat exchange unit according to an embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a side view of a heat exchange unit 1 according to the first embodiment of the present invention, and FIG. 2 is a schematic view of a cross section AA in FIG. The heat exchange unit is also referred to as a heat exchanger or a fluid heating device, and heats the fluid flowing into the inside to a predetermined temperature and supplies the fluid to the outside. Hereinafter, the fluid heated by the heat exchange unit will be described as water.

  In the heat exchange unit 1 according to this embodiment, a heater (heating means) 12 capable of heating water by energization is inserted into the fluid container 10. The fluid container 10 includes an inlet 13 through which water flows from a water source such as a public water supply and an outlet (not shown) from which hot water flows out, and the heater 12 supplies low-temperature water supplied from the water source through the inlet 13. The hot water can be continuously supplied from the outlet to the outside.

  The heater 12 is a highly insulating heater capable of heating water with electric power. In consideration of designing the heat exchange unit 1 to be small, a hollow cylindrical ceramic heater having heating portions on both the inner wall surface and the outer wall surface can be exemplified. In this case, the opening at the upper end of the heater 12 becomes the inlet 13, and water flows from the water source through the inlet 13 into the cylindrical body of the heater 12. The output of the heater 12 is controlled by adjusting the amount of current input. The adjustment of the input current amount to the heater 12 is performed by a triac 30 provided outside the fluid container 10.

  The fluid container 10 includes a hollow cylindrical body portion 15 whose bottom surface 10a is closed, and a hollow branch portion 16 formed so as to protrude from the middle portion of the body portion 15. A heater 12 is accommodated in the body portion 15. The heater 12 is attached to the fluid container 10 so that the central axis of the cylindrical heating unit is parallel to the longitudinal axis of the fluid container 10. The tip of the heater 12 is not in contact with the bottom surface 10 a of the fluid container 10.

  The branch part 16 has its opening 16 a at the tip closed by a heat transfer plate 20. That is, the heat transfer plate 20 is in direct contact with the water flowing in the fluid container 10. The heat transfer plate 20 is made of a plate material having a high thermal conductivity. Examples of the material of the heat transfer plate 20 include metals including copper. Due to the high thermal conductivity of the heat transfer plate 20, heat transfer occurs between the inner side surface 20 a and the outer side surface 20 b of the heat transfer plate 20.

  A triac 30 for adjusting the amount of input current to the heater 12 is provided in close contact with the outer surface 20 b of the heat transfer plate 20. That is, the water in contact with the inner surface 20 a of the heat transfer plate 20 and the triac 30 are in thermal contact with each other via the heat transfer plate 20.

  An impeller (impeller) 41 as a stirring member is disposed in the vicinity of the branching portion 17 corresponding to a base portion where the branching portion 16 branches from the body portion 15 of the fluid container 10. The impeller 41 can rotate in a plane perpendicular to the direction in which the branch portion 16 projects from the body portion 15, that is, in a plane perpendicular to the paper surface of FIG. it can. The rotation shaft 42 of the impeller 41 is disposed on the central axis of the branch portion 16. A specific structure of the impeller 41 and a fixing method to the fluid container 10 will be described later.

  A flow path C through which water flows is formed inside the fluid container 10. The flow path C branches from a main flow path C1 formed by being partitioned by the side wall surface 15a of the body portion 15 and the heater 12, and a branching portion 17 located in the middle of the main flow path C1. It consists of the branch flow path C2 formed in this.

  The main flow path C <b> 1 connects a region inside the hollow portion of the heater 12 and a region between the outer surface 12 a of the heater 12 and the side wall surface 15 a of the body portion 15. That is, the water flow W1 flowing through the main flow path C1 flows from the inlet 13 at the end of the heater 12 through the cylindrical body of the heater 12 along the axial direction of the heater 12, as indicated by arrows in FIG. It reaches the tip. Next, the water flow W <b> 1 is directed from the tip of the heater 12 to a space between the outer surface 12 a of the heater 12 and the side wall surface 15 a of the body portion 15, and along the longitudinal direction of the body portion 15, the bottom surface 10 a of the fluid container 10. To the outlet. The water is heated by contact with the heater 12 while flowing through the main flow path C1.

  A part of the water flow W1 flowing between the outer surface 12a of the heater 12 and the side wall surface 15a of the body portion 15 is branched at the branching portion 17 to become a water flow W2 flowing through the branch flow path C2. The water flow W2 that has flowed through the branch flow path C2 merges with the water flow W1 that flows through the main flow path C1 again after leaving the branch flow path C2.

  At this time, the impeller 41 rotates by receiving the water flow W1 and agitates the water, so that the flow of water that enters the branch channel C2 from the main channel C1, exits the branch channel C2, and merges with the main channel C1 again. Produced. That is, the water flow W2 in the branch channel C2 is promoted.

  The heat exchange unit 1 can be appropriately provided with a temperature sensor that detects the temperature of heated hot water, a valve that adjusts the inflow and / or outflow of water, a water flow meter, various safety devices, and the like in addition to the above-described members. .

  As described above, a part of the wall surface of the branch flow path C2 is configured by the heat transfer plate 20, and the triac 30 is provided in close contact with the heat transfer plate 20 that directly contacts the water flowing through the branch flow path C2. Thus, the triac 30 and the water flowing through the branch channel C2 are in thermal contact with each other via the heat transfer plate 20. Therefore, the triac 30 is an electronic component that generates heat to a high temperature during operation, but the heat generating triac 30 is cooled by the water flowing through the branch channel C2. By cooling the triac 30 in this manner, the triac 30 can be continuously operated stably. In general, the triac is easily heated to around 100 ° C. during operation. Therefore, although the water flowing through the branch channel C2 is heated by the heater 12, it is usually at a lower temperature than the triac 30 and the water flowing through the branch channel C2 can be used to cool the triac 30. In particular, when the heat exchange unit 1 is used in a human body local washing apparatus as will be described later, the upper limit of the temperature of the hot water supplied by the heat exchange unit 1 does not feel excessively hot even if it contacts the human body. Since the temperature is about 40 ° C. (for example, about 40 ° C.), the temperature of the water flowing through the branch channel C2 is much lower than the heat generation temperature of the triac 30 and the triac 30 can be efficiently cooled.

  Here, the heat transfer plate 20 is provided by closing the opening 16 a at the tip of the branch portion 16 formed by branching from the body portion 15 of the fluid container 10, thereby using the plate-shaped heat transfer plate 20. A part of the wall surface of the branch channel C2 is formed, and the heat transfer plate 20 can be brought into direct contact with the water flowing through the branch channel C2. If the heat transfer plate is arranged in the body portion 15 constituting the main flow path C1, the heat transfer plate 20 needs to be bent in accordance with the shape of the cylindrical body portion 15. By using the flat heat transfer plate 20, a high sealing property can be relatively easily ensured between the fluid container 10 and the case where a bent heat transfer plate is used. Moreover, the cost required for processing and sealing of the heat transfer plate 20 itself can be suppressed.

  The branch flow path C2 formed to provide the flat heat transfer plate 20 in this way takes the shape of a narrow path from which the water flow W2 flowing in from the branch portion 17 exits from the same branch portion 17. In such a narrow path, the water flow tends to stagnate. However, in the heat exchange unit 1, the impeller 41 is provided at the center of the branch portion 17, receives the water flow W <b> 1 flowing through the main channel C <b> 1, and rotates to stir the water in the branch channel C <b> 2. Thereby, the water flow W2 flowing through the branch channel C2 is promoted, so that the water flow W2 is prevented from stagnation.

  Foreign matter such as impurities and scales (precipitates) are often mixed in the water obtained from the public water supply, and such foreign matter I also exists in the water flowing through the heat exchange unit 1. When the water flow W2 stagnates in the branch flow path C2, the foreign matter I contained in the water flow W2 may stay in the branch flow path C2 and accumulate on the wall surface of the branch portion 16 and the heat transfer plate 20. is there. When the foreign matter I is thus accumulated in the branch flow path C2, it may grow into a large lump and block the heat exchange unit 1 or the piping downstream thereof. Moreover, the heat transfer between the heat transfer plate 20 and water may be hindered, and the cooling efficiency for the triac 30 may be reduced. However, in the heat exchange unit 1, since the water flow W2 that enters the branch flow channel C2 and exits again is promoted by the impeller 41, the foreign matter I mixed in the water flow W2 also rides on this water flow and flows into the branch flow channel. It is carried out from C2 and is less likely to stay in the branch flow path C2. That is, the effect of the impeller 41 prevents the accumulation of the foreign matter I in the branch flow path C2, and avoids the blockage of the flow path and the decrease in the cooling effect of the triac 30 due to such foreign matter I.

  Further, the promotion of the water flow W2 in the branch channel C2 by the impeller 41 not only prevents the foreign matter I from staying in the branch channel C2, but also promotes heat exchange through the heat transfer plate 20. Also has an effect. That is, when the impeller 41 rotates, a part of the water flow W1 flowing through the main flow path C1 is drawn into the branch flow path C2, and a flow of water is created that hits the heat transfer plate 20 and returns to the main flow path C1. The water in contact with the plate 20 is constantly exchanged and receives heat exchange with the triac 30. Also by this, a high cooling effect of the triac 30 can be obtained.

  Next, a specific structure of the impeller 41 and an example of a mounting method in the branch channel C2 will be described with reference to FIGS. As shown in FIG. 3, the impeller 41 is attached to the heat exchange unit 1 in the form of an impeller unit 40. The impeller unit 40 includes an impeller 41, a pin (rotating shaft) 42, and a case 43. The impeller 41 has a plurality of blades, and includes a pin insertion hole 41a having an inner diameter larger than the outer diameter of the pin 42 at the center. The pin 42 is inserted into the pin insertion hole 41 a and further press-fitted into the pin fixing recess 43 b formed on the bottom surface 43 a of the case 43. As a result, the impeller 41 is accommodated and fixed in the case 43 in a state where the impeller 41 can rotate about the pin 42. The case 43 has a shape in which a part of a cylinder is cut out, and an entire peripheral surrounding portion 43c in which a side wall surface is formed over the entire periphery, and a partially exposed portion 43d having a region in which the side wall surface is not formed. Is provided. The end surface 43e of the partially exposed portion 43d has a semicircular shape, and the end surface 43e and the entire surrounding surrounding portion 43c are smoothly connected by the end edge 43f. The total length of the case 43 is such that when the impeller unit 40 is attached to the branch portion 16 of the fluid container 10, the case 43 does not protrude from the opening 16 a at the end of the branch portion 16, and the case 43 and the heat transfer plate 20 It is specified to have a gap through which water can flow. Of these, the length (h1) of the partially exposed portion 43d is the difference in height (h2) formed at the junction between the body portion 15 and the branch portion 16 of the fluid container 10 as will be described later. It is defined to be approximately equal. The impeller 41 attached to the case 43 is in a state in which a part of the blade is exposed from the partially exposed portion 43d.

  The branch portion 16 of the fluid container 10 has a shape that can stably support and position the impeller unit 40 having the above-described shape. Specifically, the branch portion 16 has a shape such that a part of the cylinder is cut out, and the inner wall surface thereof is substantially the same as the outer wall surface of the case 43 of the impeller unit 40 (same or slightly more than that). The shape is large (see FIG. 5). A semicircular base end surface 16b corresponding to the end surface 43e of the partially exposed portion 43d is closed by a wall surface formed integrally with the wall surface portion 15a of the body portion 15. The branch portion 16 is joined to the body portion 15 at a joining portion 16d (corresponding to the end edge 43f) between the cylindrical portion corresponding to the entire surrounding surrounding portion 43c and the base end face 16b.

  The impeller unit 40 is attached to the branch portion 16 of the fluid container 10 as shown in FIG. That is, the impeller unit 40 is press-fitted from the partially exposed portion 43d side through the opening portion 16a of the branch portion 16 formed in a substantially cylindrical shape. The impeller unit 40 is inserted until the end surface 43e of the case 43 hits the wall surface of the base end surface 16b of the branch portion 16. Then, the opening 16a of the branch portion 16 is covered with the heat transfer plate 20 to which the triac 30 is fixed, and the heat transfer plate 20 is fixed to the branch portion 16 using screws. do it.

  FIG. 5 shows a BB cross-sectional view of the heat exchange unit 1 with the impeller unit 40 and the heat transfer plate 20 attached in this manner. Since the inner wall surface of the branch part 16 of the fluid container 10 has substantially the same shape as the outer wall surface of the case 43 of the impeller unit 40, the impeller unit 40 is positioned and fixed at the branch part 16. In particular, the inner diameter d <b> 1 of the branch portion 16 and the outer diameter of the case 43 are substantially equal, and the impeller unit 40 is fixed in the branch portion 16 by being press-fitted into the branch portion 16. The difference in height h2 between both ends of the joint portion 16d (that is, the branch portion 17) between the branch portion 16 and the body portion 15 is substantially equal to the length h1 of the partially exposed portion 43d in the case 43 of the impeller unit 40. Thus, the impeller unit 40 is positioned in a state where a part of the blades of the impeller 41 exposed from the partially exposed portion 43d protrudes into the main flow path C1 formed in the body portion 15 and does not contact the heater 12. .

  In this way, by using the impeller unit 40 in which the impeller 41 is accommodated in the case 43, the impeller 41 is arranged at the branching portion 17 between the main flow path C1 and the branch flow path C2 so as to be axially rotatable with a simple configuration. be able to. And since a part of blade | wing of the impeller 41 has protruded in the main flow path C1, the impeller 41 is well rotated by receiving the water flow W1 which flows through the main flow path C1, and the water flow W2 in the branch flow path C2 Is effectively promoted.

  In addition, the method of attaching the impeller 41 in the fluid container 10 rotatably is not restricted to the method using the impeller unit 40 having the case 43 as described above. For example, a method of fixing the rotating shaft 42 of the impeller 41 to the inner side surface 20a of the heat transfer plate 20 can be considered.

  In the heat exchange unit 1 according to the first embodiment of the present invention described above, the water flow W2 in the branch channel C2 is promoted by using a stirring member such as the impeller 41, and the foreign matter I becomes the branch channel. Even if it enters C2, it does not stay in the branch channel C2, thereby eliminating the foreign matter I from the branch channel C2. On the other hand, as a foreign matter removing member that removes the foreign matter I from the branch flow path C2 based on another principle, a net-like member that prevents the foreign matter I from entering the branch flow path C2 can be cited.

  Below, the heat exchange unit 5 concerning 2nd embodiment using the mesh member as a foreign material exclusion member is demonstrated. Description of the configuration common to the heat exchange unit 1 according to the first embodiment is omitted.

  Similar to the heat exchange unit 1 according to the first embodiment, the heat exchange unit 5 according to the second embodiment includes a fluid container 10 including a body portion 15 and a branch portion 16, and a main flow path is provided in each of them. C1 and a branch channel C2 branched from the main channel C1 in the branch part 17. In place of the impeller 41, a mesh (net-like member) 51 is provided.

  The mesh 51 has a mesh size (mesh size) that allows water to pass but does not allow the foreign matter I to pass through, and is provided so as to cover the branch portion 17 between the main channel C1 and the branch channel C2. As a result, the foreign matter I flowing through the main flow path C1 cannot enter the branch flow path C2 together with the water flow W2. As a result, the accumulation of the foreign matter I in the branch flow path C2 and the resulting blockage of the flow path and a decrease in cooling efficiency for the triac 30 are prevented.

  As shown in FIG. 7, the mesh 51 can also be fixed and positioned in the fluid container 10 using a mesh unit 50 similar to the impeller unit 40. A mesh unit 50 shown in FIG. 7A has a configuration in which an opening 52 b formed by cutting out a part of a cylindrical case 52 is covered with a mesh 51. A semicircular end face 52a is formed at the end of the case 52 on the side where the opening 52b is formed. The opposite end is open. The mesh 51 may be formed integrally with the case 52 by insert molding or the like, or may be formed separately from the case 52 and fixed to the case 52 by adhesion or the like. . Further, the end face 52a may also be configured from a mesh.

  As in the case of the heat exchange unit 1 according to the first embodiment, the outer wall surface of the case 52 and the inner wall surface of the branch portion of the fluid container 10 are formed in substantially the same shape. As a result, as shown in FIG. 7B, when the mesh unit 50 is inserted into the branch portion 16 until the end surface 52 a of the case 52 contacts the base end surface 16 b of the branch portion 16, the body portion 15 of the fluid container 10 is formed. The mesh unit 50 is positioned in a state in which the mesh 51 is disposed so as to cover the entire branch portion 17 between the main channel C1 and the branch channel C2 formed in the branch portion 16.

  Note that the mesh 51 can be fixed to the branch portion 17 between the main channel C1 and the branch channel C2 by a method other than using the mesh unit 50. For example, a method of forming the mesh 51 integrally with the fluid container 10 using insert molding is conceivable.

  As described above, even if any one of the method of promoting the water flow W2 in the branch flow path C2 using the stirring member and the method of preventing the foreign matter I from entering the branch flow path C2 using the mesh member, the branching is performed. It is possible to prevent foreign matter I from accumulating in the flow path C2 and causing a blockage of the flow path and a decrease in cooling efficiency with respect to the triac 30. Which foreign substance exclusion member is used may be appropriately selected in consideration of the shape and arrangement of the main flow path C1 and the branch flow path C2, the type and size of the assumed foreign substance I, and the like. The configuration using the stirring member is such that foreign matter I having a very small particle size that cannot be completely removed by the mesh member can be removed, and the foreign matter I having a small particle size that has entered the branch flow path C2 is large due to aggregation or the like. The heat transfer plate 20 can be effectively prevented by increasing the diameter and accumulating in the branch flow path C2, not requiring periodic replacement of the foreign matter exclusion member, and, as described above, by promoting the water flow W2. It is superior to the configuration using the mesh member in that it has a secondary effect that heat exchange can be promoted. On the other hand, the configuration using the net-like member is not only capable of preventing foreign matter I from accumulating in the branch flow path C2, but also temporarily preventing the foreign matter I from being accumulated. The configuration is simple and can be formed at a low cost. In the point which is easy to arrange | position to the branch part 17 also when the path | route C2 is narrow, it is superior to the structure which uses a stirring member.

  Finally, the human body local cleaning apparatus according to the embodiment of the present invention includes the heat exchange units 1 and 5 according to any one of the above embodiments. The human body local cleaning device is provided in the toilet seat, and performs butt cleaning or so-called bidet cleaning by ejecting hot water from a nozzle. The heat exchange units 1 and 5 supply hot water heated to a predetermined temperature for ejection from the nozzle.

  As described above, the TRIAC 30 provided in the heat exchange units 1 and 5 is cooled by the water flowing through the branch channel C2, and thus operates stably. Further, the effect of the foreign matter removing member such as the impeller 41 and the mesh 51 prevents the foreign matter I from accumulating inside the branch flow path C2, and the blockage of the flow path by the foreign matter I and the cooling efficiency of the triac 30 are reduced. Is less likely to occur. As a result, the heat exchange units 1 and 5 are operated stably and with a long life. The user can use the human body local cleaning device comfortably and safely over a long period of time.

  As mentioned above, although embodiment of this invention was described in detail, this invention is not limited to the said embodiment at all, A various change is possible in the range which does not deviate from the summary of this invention. For example, the electronic component provided on the heat transfer plate 20 is not limited to the triac 30 alone, and other types of electronic components that generate heat may be provided and cooled by water flowing through the branch channel C2. On the heat transfer plate 20, not only electronic components that generate heat, but also electronic components that operate by detecting the temperature of the water flowing through the flow path C, such as a thermal fuse, may be provided. Furthermore, in the said embodiment, although the branched flow path C2 was formed in order to provide the flat heat exchanger plate 20, the branched flow path C2 is not necessarily limited to that for providing a heat transfer plate, and various sensors are used. In the branching portion 17 of the branching channel C2 that is formed for other purposes such as being arranged in the channel C and does not have a heat transfer plate, a foreign matter removing member such as the impeller 41 or the mesh 51 in the above embodiment is used. Configuration can be applied.

1,5 Heat exchange unit 10 Fluid container 12 Heater 15 Body portion 15a (Body portion) Side wall surface 16 Branch portion 16a (Branch portion) Opening portion 16b (Branch portion) Base end surface 17 Branch portion 20 Heat transfer plate 20a ( Inner side 20b (of heat transfer plate) Outer side 30 (of heat transfer plate) Triac 40 Impeller unit 41 Impeller 42 Pin (rotary shaft)
43 Case 43c Fully encircling surrounding part 43d Partially exposed part 50 Mesh unit 51 Mesh 52 Case 52a End face C Channel C1 Main channel C2 Branch channel W1 Water flow W2 (Main channel) Water flow (Branch channel)

Claims (3)

A fluid container having a flow path through which fluid flows, and a heating unit provided inside the fluid container for heating the fluid flowing through the flow path,
The flow path has a main flow path and a branch flow path branched from a branch portion in the middle of the main flow path,
The heat exchange unit according to claim 1, wherein a foreign matter removing member for removing foreign matters from the branch flow path is provided at the branch portion.   The foreign matter exclusion member is a stirring member that promotes the flow of fluid in the branch flow channel by rotation, or a mesh member that covers the branch portion and prevents foreign matter from entering the branch flow channel. The heat exchange unit according to claim 1.   A human body local cleaning apparatus, wherein hot water heated by the heat exchange unit according to claim 1 or 2 is supplied for human body local cleaning.

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