JP2009156507A - Fluid heating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To save energy by efficiently transferring heat generated from a heater to the fluid without loss. <P>SOLUTION: This fluid heating device 11 for heating the fluid led in from a lead-in portion while allowing the fluid to flow along a flow channel, and leading out the fluid from a lead-out portion, comprises the heater 21 for heating the fluid, and a case 31 having the lead-in portion and the lead-out portion and forming the flow channel with the heater, and the flow channel is formed to surround the heater. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a fluid heating apparatus that heats a fluid introduced from an introduction part while flowing the fluid along a flow path and leads the fluid from the lead-out part.

The fluid heating device is used, for example, as a water heater of a warm water washing toilet seat. Hot water heaters used for hot water flush toilet seats include hot water storage water heaters and instantaneous water heaters, but in recent years, many instantaneous water heaters have been found.
Technical elements related to the instantaneous water heater include an electric energy supply method (see, for example, Patent Document 1 and Patent Document 2), temperature control (for example, see Patent Document 3), a flow path, and the like. By combining these, cost performance can be improved.

In particular, regarding the electric energy supply method, since generation of CO2 due to power generation is a problem in terms of global environmental conservation, it is desired to be implemented with high thermal efficiency.
For example, the water heater described in Patent Document 1 uses an electric energy supply method by induction heating such as a coil. Moreover, the water heater described in Patent Document 2 uses an electric energy supply method by resistance heating of a ceramic heater. When induction heating and resistance heating are compared by conversion efficiency, which is an evaluation item of the electric energy supply method, resistance heating is superior.

Therefore, in the water heater described in Patent Document 4, a resistance heating element is formed by thermal spraying on the surface of a casting part cast so as to wrap several pipes through which fluid flows, and the resistance heating element is energized. The fluid is resistance heated. According to this water heater, it is said that the conversion efficiency of electric energy is further increased by forming a resistance heating element using a thermal spraying technique.
Japanese Patent No. 2753003 Japanese Patent No. 3773357 Japanese Patent No. 3724126 Japanese Patent No. 3216747

  However, in the water heater described in the above-mentioned patent document, there are still concerns about the following points. That is, in the water heaters described in Patent Document 1, Patent Document 2 and Patent Document 4, since another substance is interposed between the heater that generates heat and the fluid, loss occurs when heat is transferred to the other substance. Had occurred. That is, the fluid must be heated by indirect heating with low thermal efficiency. Further, in the water heater described in Patent Document 3, a part of the heater forms a flow path and is directly heated, but heat is lost from the part not forming the flow path of the heater to the outside of the fluid. Was.

  Then, due to these points, the conventional water heater has a problem that it is difficult to become hot water instantaneously with household electric power and energy loss is large.

  The present invention has been made in view of the above-described circumstances, and provides a fluid heating apparatus capable of transmitting heat generated from a heater to a fluid with higher efficiency and saving energy without loss. is there.

In order to solve the above problems, the present invention proposes the following means.
The present invention is a fluid heating apparatus that heats a fluid introduced from an introduction portion while flowing along a flow path and leads the fluid from the lead-out portion, the heater for heating the fluid, the introduction portion, and the lead-out And a case for forming the flow path between the heater and the heater, wherein the flow path is formed so as to surround the heater.
In this application, the flow path surrounding the heater means that the flow path is not formed so as to cover the entire heater, but that at least the entire portion corresponding to the heating surface that generates heat in the heater forms the flow path. means.

  In the fluid heating apparatus according to the present invention, the flow path is formed by the heater and the case. Therefore, the heat generated from the heater can be directly transferred to the fluid. Moreover, since the flow path is formed so as to surround the heater, all the heat generated from the heater can be transmitted to the fluid. As a result, the heat generated from the heater can be transferred to the fluid with higher efficiency without loss and energy can be saved.

  In the fluid heating device according to the present invention, the case is formed by a plurality of case components, and the flat heater is sandwiched from the left and right by the case component having a meandering groove formed on the inner surface side. It is preferable to form the meandering flow path by indenting.

  In the fluid heating apparatus according to the present invention, the flow path formed by the heater and the case is serpentine. Therefore, the distance that the fluid flows in the fluid heating apparatus is longer than the distance in the case where the fluid flows linearly from the introduction section to the extraction section in the same apparatus, for example. Therefore, the period during which the fluid and the heater come into contact with each other is increased, and the heating period of the fluid with the heater in the fluid heating apparatus can be increased. Accordingly, it is possible to transmit more heat generated from the heater while maintaining the size of the fluid heating device, and to further save energy.

  Further, in the fluid heating device according to the present invention, the case is formed by a plurality of case components, and the flat plate-like heater is sandwiched from the left and right by the case components, and the bottom of the case and the bottom side It is preferable to form the U-shaped flow path by providing a gap with one end of the heater.

  In the fluid heating apparatus according to the present invention, the flow path can be formed so as to surround the heater simply by sandwiching the flat heater with the case structure. Thereby, it is possible to easily create a fluid heating device that transfers heat generated from the heater to the fluid with higher efficiency without loss.

In the fluid heating apparatus of the present invention, the heater preferably has a power density of 2 W / cm ² or more and 50 W / cm ² or less.

  In the fluid heating apparatus according to the present invention, it is possible to provide a fluid heating apparatus including a heater that instantaneously and continuously heats the fluid flowing in the flow path.

  According to the fluid heating apparatus of the present invention, heat generated from the heater can be transmitted to the fluid with higher efficiency without loss, and energy can be saved.

[First Embodiment]
A first embodiment according to the present invention will be described below with reference to FIGS.
A water heater (fluid heating device) 11 according to the present embodiment is provided in a warm water washing toilet seat T as shown in FIG. The warm water washing toilet seat T includes a warm water washing unit T1 that can be attached to the toilet bowl, and a toilet seat body T2 that is pivotally fixed to the warm water washing unit T1 at the base end side.

  The hot water washing unit T1 is connected to an external water supply so as to be supplied with water (fluid) W, and a water heater 11 that heats the water W supplied from the water supply connection T11 to warm water. And a nozzle part T12 that sprays hot water heated by the water heater 11 and performs local cleaning, a first hose T13 that connects the water supply connection part T11 and the water heater 11, and the water heater 11 and the nozzle part T12. A second hose T14, a flowing water valve T15 for adjusting the amount of water from the water supply connecting portion T11 to the water heater 11, a power supply portion T16 for supplying power to the flowing water valve T15, the water heater 11 and the nozzle portion T12, and the power source And a power supply control unit T17 that controls the unit T16.

  The hot water cleaning unit T1 controls the power supply unit T16 based on an input signal input to the power supply control unit T17 from the outside via a switch (not shown) or the like, and opens the water flow valve T15 to supply the water heater 11 with water W And a heater 21 (described later) of the water heater 11 is caused to generate heat. As a result, the water W is heated by the heater 21 while being introduced into the water heater 11 through the first hose T13 to become hot water, and is further led out to the nozzle portion T12 through the second hose T14. The nozzle part T12 performs local cleaning by injecting hot water with the electric energy supplied from the power supply part T16. At this time, the water W stored between the water heater 11 and the nozzle portion T12 is drained.

  The configuration of the water heater 11 according to this embodiment used for the warm water washing toilet seat T as described above will be described. As shown in FIGS. 2 and 3, the water heater 11 includes a heater 21 that heats the water W, and a case 31 that forms a flow path F <b> 1 between the heater 21.

  As shown in FIG. 2, the heater 21 is formed with a flat substrate 21a, an insulating layer (not shown) formed inside the substrate 21a, and inside the insulating layer, and is energized. Thus, a conductive layer 21b that generates heat, an electrode portion 21c that enables electrical connection between the conductive layer 21b and the outside, and a fixing hole 21d that is fixed to the case 31 are provided. The heater 21 can generate heat when the conductive layer 21b is energized from the outside through the electrode portion 21c.

The material of each component of the heater 21 is, for example, a pair of base materials 21a made of stainless steel, an insulating layer made of aluminum oxide, and a conductive layer 21b made of nickel chrome. The heater 21 can be manufactured, for example, by preparing a pair of flat base materials 21a and spraying an insulating layer and a conductive layer 21b on the inner surfaces of the pair of base materials 21a. Thus, the heater 21 of high power density (2W / cm ² or more 50 W / cm ² degree or less) can be produced.

As shown in FIG. 3A, the case 31 has a prismatic shape, and is formed by superposing a flat first case component 31a and second case component 31b.
As shown in FIG. 2, the first case component 31a includes a recess 311 formed on the inner surface side, a joint surface 312 that is located around the recess 311 and contacts the second case component 31b, The upper part 310A and the recessed part 311 are formed so as to communicate with each other, and a hose connecting part 313 that can be connected to the hoses T13 and T14 of the warm water flush toilet seat T is provided.
The second case component 31b is designed such that when the first case component 31b is arranged so as to face the first case component 31a, each component is arranged at a position facing the first case component 31a. Only one case structure 31a will be described.

  The recess 311 is formed so that the length in the long side direction is longer than the length in the long side direction of the heater 21, and the length in the short side direction is equal to the length in the short side direction of the heater 21. . The recess 311 has a step 314 formed on the outer periphery. As shown in FIGS. 3B and 3C, the step portion 314 forms the water heater 11 by sandwiching the heater 21 from the left and right sides by the first case structure 31 a and the second case structure 31 b. When it does, it is designed so that it may contact | abut to the heater 21 with the step part 314 of the 2nd case structure 31b.

  Further, as shown in FIG. 2, the step portion 314 is provided with a heater fixing hole 315. When the heater 21 forms the water heater 11, a fixing pin (not shown) is fitted into the fixing hole 21 d and the heater fixing hole 315 of the heater 21, so that the first case structure 31 a and the second case structure It is fixed between 31b. When forming the water heater 11, the heater fixing hole 315 has a position in consideration so that a gap S1 is provided between the heater 21 and the bottom 310B side of the case 31 as shown in FIG. Designed with.

  As illustrated in FIG. 2, the bonding surface 312 includes a plurality of taps 316 and a pair of electrode grooves 317. As shown in FIG. 3A, the tap 316 is fixed so as to sandwich the first case component 31a and the second case component 31b with bolts L and nuts N when the water heater 11 is formed. Used for. The pair of electrode grooves 317 are formed at positions where the heater 21 is in contact with the electrode portion 21 c of the heater 21 when the heater 21 is fixed to the step portion 314. When the water heater 11 is formed, an electrode (not shown) is externally provided in the electrode hole 318 formed so that the electrode grooves 317 of the first case structure 31a and the second case structure 31b overlap each other. The conductive layer 21b can be energized through the electrode portion 21c of the heater 21.

  The hose connection part 313 is provided on the upper part 310A side of the first case component 31a. The hose connecting portion 313 can be connected to either the first hose T13 or the second hose T14 of the warm water flush toilet seat T. That is, the water W can be introduced from the outside into the flow path F1 by being connected to the first hose T13, and the water W can be led out by being connected to the second hose T14.

  The first case component 31a and the second case component 31b are formed by processing an acrylic resin or the like.

  The first case structure 31a and the second case structure 31b formed as described above fix the heater 21 to the heater fixing hole 315 of the step portion 314 with a fixing pin and sandwich the heater 21 from the left and right. The water heater 11 is formed by fixing with bolts L and nuts N. At this time, a gap S1 is provided between the bottom portion 310B of the case 31 and one end of the heater 21 on the bottom portion 310B side. Thereby, the flow path F1 of the water heater 11 is formed in a U shape so as to surround the heater 21 as shown in FIG.

  By the way, the water heater 11 which concerns on this embodiment is integrated in the warm water washing toilet seat T as shown below. That is, the first hose T13 of the warm water cleaning toilet seat T is connected to the hose connecting portion 313 of the first case constituent body 31a, and the second hose T14 of the hot water cleaning toilet seat T is connected to the hose connecting portion 313 of the second case constituent body 31b. Are connected. That is, the hose connection part 313 of the first case component 31a functions as an introduction part of the water heater 11, and the hose connection part 313 of the second case structure 31b functions as a lead-out part of the water heater 11. And the electrode electrically connected with the power supply part T16 of the warm water washing toilet seat T is inserted in the electrode hole 318, and the electrode part 21c of the heater 21 and the power supply part T16 of the warm water washing toilet seat T are electrically connected. .

Next, the operation of the water heater 11 according to this embodiment will be described.
When an input signal is input from the external switch to the power supply control unit T17, water W is introduced into the water heater 11 from the first hose T13 of the warm water washing toilet seat T, and from the power supply unit T16 to the heater 21. The heater 21 generates heat when power is supplied.

Here, since the flow path F <b> 1 is formed by the heater 21 and the case 31, heat generated from the heater 21 can be directly transmitted to the water W. Further, since the flow path F1 is formed in a U shape so as to surround the heater 21, all the heat generated from the heater 21 can be transmitted to the water W. Thereby, the heat generated from the heater 21 can be transmitted to the water W with higher efficiency without loss and energy saving can be achieved.
As a result, the water heater 11 of the present embodiment can instantaneously and continuously heat the water W inside the apparatus, and the hot water can be derived from the deriving unit of the water heater 11.

  Further, in the water heater 11 of the present embodiment, the flow path F1 is formed so as to surround the heater 21 simply by sandwiching the flat heater 21 from the left and right by the first case component 31a and the second case component 31b. Can be formed. Thereby, the water heater 11 can be created easily.

[Second Embodiment]
Next, a second embodiment according to the present invention will be described with reference to FIG. In addition, in the water heater 12 of this 2nd Embodiment, about the part same as the component in the water heater 11 of 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 4, the difference between the second embodiment and the first embodiment is that the size of the heater 22 and the bottom portion 310B side of each of the first case component 32a and the second case component 32b. That is, a bottom hose connecting portion 329 is provided.

The heater 22 is formed so that the length in the long side direction is equal to the length in the long side direction of the recess 311 of both case components 32a and 32b. That is, the heater 22 completely divides the flow path F2 formed between the case structural bodies 32a and 32b. Moreover, the bottom side hose connection part 329 is connected so as to form a part of the flow path F2 by the flow path hose F21.
That is, in the water heater 12 of the present embodiment, the water W passes between the first case constituent body 32a and the heater 22 via the flow path hose F21, and the second case constituent body 32b and the heater 22 are connected. A flow path F2 is formed so as to flow between them.

  According to the water heater 12 according to the present embodiment, as described above, the flow path F2 is formed by the case 32 and the heater 22 so as to surround the heater 22, so that all the heat generated from the heater 22 is water. W can be transmitted. Thereby, the heat generated from the heater 22 can be transmitted to the water W with higher efficiency without loss and energy saving can be achieved.

[Third Embodiment]
Next, a third embodiment according to the present invention will be described with reference to FIG. In addition, in the water heater 13 of this 3rd Embodiment, about the part same as the component in the water heater 11 of 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  The difference between the third embodiment and the first embodiment is that, as shown in FIG. 5A, the heater 23 has a cross shape, and the hose connecting portion 333 is only in the first case structure 33a. It is provided.

  That is, the heater 23 used in the water heater 13 of the present embodiment includes a flat plate portion 23a and a first case configuration that is orthogonal to the flat plate portion 23a at the approximate center in the short side direction of the flat plate portion 23a. The first convex portion 23b provided on the body 33a side and the second convex portion 23c provided on the second case constituting body 33b side so as to be orthogonal to the flat plate portion 23a are provided. In addition, it is preferable that the conductive layer 21b of the heater 23 is also formed inside each of the first convex portion 23b and the second convex portion 23c.

  The flat plate portion 23a is formed so that the length in the long side direction is shorter than the length in the long side direction of the concave portion, similarly to the heater 21 of the first embodiment. That is, the flow path formed by the first case structure 33a and the heater 23 and the flow path formed by the second case structure 33b and the heater 23 are U-shaped on the bottom 310B side of the case 33. Connected to each other.

  The first convex portion 23b is formed such that both the upper portion 310A side and the bottom portion 310B side of the first case component 33a are shortened by the length corresponding to the width of the step portion from the length in the long side direction of the concave portion. Has been. That is, as shown in FIG. 5B, the first convex portion 23b has a flow path formed by the first case structure 33a and the flat plate portion 23a of the heater 23 as the first flow path F31 and It divides | segments into the 2nd flow path F32.

  Further, as shown in FIG. 5A, the second convex portion 23 c is formed on the upper portion 310 </ b> A side of the case 33 so that a gap is formed between the second convex portion 23 c and the case 33. Further, the bottom 310B side of the second convex portion 23c is provided up to a position corresponding to the bottom 310B side of the first convex portion 23b. That is, as shown in FIG. 5B, the second convex portion 23c passes through the flow path formed by the second case constituting body 33b and the flat plate portion 23a of the heater 23 on the bottom 310B side. While dividing | segmenting into the path F33 and the 4th flow path F34, the 3rd flow path F33 and the 4th flow path F34 are connected by the upper part 310A side.

  One of the hose connecting portions 333 provided in the first case constituting body 33a can connect the hoses T13 and 14 of the hot water washing toilet seat T and the first flow path F31, and the other is the hot water washing toilet seat T. Each hose T13, 14 and the second flow path F32 are connectable.

  Here, the first hose T13 of the warm water washing toilet seat T is connected to one hose connecting portion 333a of the first case structure 33a, and the second hose T14 of the hot water washing toilet seat T is connected to the other hose connecting portion 333b. . That is, one hose connection portion 333 a is an introduction portion for the water heater 13, and the other hose connection portion 333 b is an extraction portion for the water heater 13.

  Then, the water W introduced from the one hose connecting portion 333a connected to the first hose T13 flows from the first flow path F31 toward the bottom portion 310B of the case 33, and reaches the third flow path F33. . Subsequently, the water W flows from the third flow path F33 to the upper portion 310A side of the case 33, flows to the fourth flow path F34, and flows from the fourth flow path F34 to the bottom portion 310B side. To the flow path F32. Then, the water W is led out to the second hose T14 via the other hose coupling portion 333b on the upper part 310A side of the second flow path F32. That is, the flow path F <b> 3 is formed so as to surround the heater 23.

  In the water heater 13 of the present embodiment, the flow path F3 formed by the heater 23 and the case 33 is, for example, the water W linearly flows from the introduction part to the outlet part in the water heater 13 having the same size. It becomes longer than the distance in the case of. Therefore, the period in which the water W and the heater 23 come into contact with each other is lengthened, and the heating period of the water W by the heater 23 in the water heater 13 can be lengthened. Thereby, more heat can be transmitted while maintaining the size of the water heater 13.

[Fourth Embodiment]
Next, a fourth embodiment according to the present invention will be described with reference to FIGS. In addition, in the water heater 14 of this 4th Embodiment, about the part same as the component in the water heater 12 of 2nd Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  The difference between the fourth embodiment and the second embodiment is that, as shown in FIG. 6, a meandering groove 341, not a recess, is formed on the inner surface side of the first case component 34 a and the second case component 34 b. Is formed, and the bottom side hose connecting part 329 is connected to the hoses T13 and T14 of the warm water flush toilet seat T.

  That is, the flow path F4 of the water heater 14 is formed between the groove 341 of the first case component 34a and the heater 22 as shown in FIGS. 7 (a) and 7 (b). The meandering flow path F41 and the second meandering flow path F42 formed between the groove portion 341 of the second case constituting body 34b and the heater 22 are configured.

Further, as shown in FIG. 6, the first hose T13 of the warm water flush toilet seat T is branched into two and connected to the hose connecting portions 313 of the first case constituent body 34a and the second case constituent body 34b, respectively. Has been. And the 2nd hose T14 of the warm water washing toilet seat T is also branched into two, and each is connected with the bottom side hose connection part 329 of the 1st case structure 34a and the 2nd case structure 34b.
That is, the hose connecting portion 313 of both case components 34a and 34b functions as an introduction portion of the water heater 14, and the bottom side hose connection portion 329 of both case components 34a and 34b functions as a lead-out portion of the water heater 14. .

  Accordingly, the water W introduced from the hose connecting portion 313 of the first case component 34a is, as shown in FIGS. 7A and 7B, the groove 341 and the heater of the first case component 34a. 22 flows through the first serpentine flow path F41 formed by the second case 22 and is led out from the bottom side hose connection portion 329 of the first case structure 34a to the second hose T14 of the warm water flush toilet seat T. Similarly, the second meandering flow path F42 formed by the groove portion 341 of the second case structure 34b and the heater 22 is led out to the second hose T14.

  Therefore, in the water heater 14 of the present embodiment, the flow path F4 formed so as to surround the heater 22 by the heater 22 and the case 34 has a meandering shape. Therefore, the distance that the water W flows in the water heater 14 is longer than, for example, the distance in the case where the water W linearly flows from the introduction unit to the discharge unit in the same apparatus. Therefore, the period in which water and the heater 22 come into contact with each other is lengthened, and the heating period of the water W by the heater 22 in the water heater 14 can be lengthened. Thereby, more heat can be transferred while maintaining the size of the water heater 14.

[Fifth Embodiment]
Next, a fifth embodiment according to the present invention will be described with reference to FIG. In addition, in the water heater 15 of this 5th Embodiment, about the part same as the component in the water heater 12 of 2nd Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  The difference between the fifth embodiment and the second embodiment is that meandering convex portions 25a are formed on the main surface of the heater 25 as shown in FIG. In addition, it is preferable that the conductive layer 21b of the heater 25 is also formed inside each meandering convex portion 25a.

  That is, in the water heater 15 according to the present invention, as in the fourth embodiment, meandering is provided between the first case component 32a and the heater 25 and between the second case component 32b and the heater 25, respectively. A flow path is formed. Therefore, the same effect as the fourth embodiment is achieved, and the surface area of the heater 25 in contact with the flow path F5 is increased as compared with the fourth embodiment. Thereby, the heat generated from the heater 25 can be transmitted to the water W with higher efficiency.

  Although the embodiments and examples of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and includes design changes and the like without departing from the scope of the present invention. It is.

  For example, in the above-described embodiment, the entire heater is fixed after being sealed in the case, but is not limited thereto. That is, the entire heater does not need to be in the water W, and at least the heating surface, which is one surface of the heater that forms the conductive layer 21b, may be disposed so as to form a flow path. For example, the electrode portion 21c of the heater does not have to be at a position sandwiched between the recesses. Accordingly, the electrode portion 21c of the heater may be in contact with the first case component and the second case component, and the heater may be fixed so as to be sandwiched between the case components.

  In the above embodiment, each case component is formed so that the outer shape of the case has a prismatic shape. However, the outer shape of the case may be cylindrical or box-shaped. Further, the case may be constituted by three or more case components.

  Moreover, in the said embodiment, the amount of water introduced into a water heater from an introducing | transducing part is about 0.5-1.5 l / min, and the electric power supplied from the power supply of the warm water washing toilet seat T is about 1 Kw (it changes with water amounts). It is preferable.

  Moreover, in the said embodiment, although the heater manufactured using the thermal spraying technique is used, it is not restricted to this. For example, a heater 26 as shown in FIG. 9 may be used. The heater 26 is a substantially flat heater, made of SUS (stainless copper) as a material, a base material 21a that forms the outer shape of the heater 26, and inside the main surfaces of the base material 21a along the longitudinal direction. A pair of conductive layers 21b that are formed and generate heat when energized, a plurality of electrode portions 21c that allow the conductive layers 21b and the outside to be electrically connected, a base material 21a, conductive layers 21b, and electrode portions 21c And a coating layer 21f that covers the conductive layer 21b, the electrode portion 21c, and the insulating layer 21e. According to this heater 26, water corrosion of the conductive layer 21b of the heater 26 can be prevented by SUS forming the base material 21a, and durability in the water W can be improved. In the heater 26, the conductive layer 21b may be provided only on one side.

  Moreover, although the said embodiment demonstrated using the example which made the warm water heater one structure of the warm water washing toilet seat T, it is not restricted to what is used for the warm water washing toilet seat T.

  Moreover, in the said embodiment, although the water W was heated with the water heater which is a fluid heating apparatus, the heating object will not be restricted if it is a fluid which has fluidity | liquidity not only the water W.

In the water heater 12 of 2nd Embodiment which concerns on this invention, it experimented on the following conditions.
The first case component 32a and the second case component 32b each have a length of 170 mm in the long side direction and 46 mm in the short side direction. Further, the long side direction of the recess 311 of both case constituent bodies 32a and 32b was 150 mm in length, 24 mm in the short side direction, and 4 mm in depth.
The heater 22 has a length in the long side direction of 170 mm and a length in the short side direction of 30 mm. The conductive layer 21b of the heater 22 is 144 mm in the long side direction and 24 mm in the short side direction. The conductive layer 21b of the heater 22 is designed so as to be opposed to the concave portions 311 of the case constituting bodies 32a and 32b. That is, the conductive film 21 b of the heater 22 is surrounded by the flow path F <b> 2 formed by the heater 22 and the case 32.

When the amount of water was 0.8 ml / min, the voltage and power were about 100 V and 1 Kw, respectively, and the power density of the heater 22 was 14 / cm ² , water W whose temperature at the introduction part was 20 ° C. was instantaneously derived. It became hot water of about 45 ° C. in the part. The thermal efficiency at this time was about 95%.
This proved the effect of the water heater according to the present invention.

It is a general view of the warm water washing toilet seat in which the fluid heating device of a 1st embodiment concerning the present invention is used. It is a disassembled perspective view of the fluid heating apparatus of 1st Embodiment which concerns on this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure for demonstrating the fluid heating apparatus of 1st Embodiment which concerns on this invention, Comprising: (a) is the whole figure after an assembly, (b) is the cross-sectional arrow AA figure shown to (a), ( (c) is a cross-sectional arrow BB diagram shown in (a). It is a figure for demonstrating the fluid heating apparatus of 2nd Embodiment which concerns on this invention, Comprising: It is sectional drawing applicable to the cross-sectional arrow AA figure of Fig.3 (a). It is a figure for demonstrating the fluid heating apparatus of 3rd Embodiment which concerns on this invention, Comprising: (a) is an exploded perspective view, (b) corresponds to the cross-sectional arrow BB figure of Fig.3 (a). It is sectional drawing. It is a disassembled perspective view of the fluid heating apparatus of 4th Embodiment which concerns on this invention. It is a figure for demonstrating the fluid heating apparatus of 4th Embodiment which concerns on this invention, Comprising: (a) is sectional drawing applicable to the sectional arrow AA figure of Fig.3 (a), (b) is a figure. FIG. 3C is a cross-sectional view corresponding to the cross-sectional view CC of FIG. It is a disassembled perspective view of the fluid heating apparatus of 5th Embodiment which concerns on this invention. It is sectional drawing of the modification of the heater which can be utilized with the fluid heating apparatus of this invention.

Explanation of symbols

W Water (fluid)
11, 12, 13, 14, 15 Water heater (fluid heating device)
21, 22, 23, 25, 26 Heater 31, 32, 33, 34 Case 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b Case structure F1, F2, F3, F4, F5 Flow path S1 Clearance 310B Bottom parts 313, 333, 333a, 333b Hose connection part (introduction part, lead-out part)
329 Bottom side hose connection part (lead-out part)

Claims (4)

A fluid heating device that heats a fluid introduced from an introduction part while flowing along a flow path and leads the fluid from the lead-out part,
A heater for heating the fluid;
A case having the introduction part and the lead-out part and forming the flow path between the heater and the heater;
The flow path is formed to surround the heater;
A fluid heating device. The fluid heating apparatus according to claim 1,
The case is formed by a plurality of case components.
Forming the flow path in a meandering manner by sandwiching the flat heater from the left and right with the case structure in which a meandering groove is formed on the inner surface side;
A fluid heating device. The fluid heating apparatus according to claim 1,
The case is formed by a plurality of case components.
The flat heater is sandwiched by the case structure from the left and right, and a U-shaped flow path is formed by providing a gap between the bottom of the case and one end of the heater on the bottom side. thing,
A fluid heating device. The fluid heating apparatus according to any one of claims 1 to 3,
The heater has a power density of 2 W / cm ² or more and 50 W / cm ² or less,
A fluid heating device.

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