JP7266782B2 - Momentary heat exchanger and sanitary washing device - Google Patents

Description

Aspects of the present invention relate to instantaneous heat exchangers and sanitary washing devices.

2. Description of the Related Art A sanitary washing device is known that is attached to a seat-type toilet to wash a user's private parts such as the buttocks. Such a sanitary washing device is required to have a low silhouette design with a low height, and miniaturization of each unit constituting the sanitary washing device is required.

If the size of the heating element is reduced in the instantaneous heat exchanger, the heat transfer area will be reduced. Therefore, in order to obtain the same amount of heat as before the miniaturization, the surface temperature of the heating element must be increased, increasing the risk of scale formation on the surface of the heating element. Therefore, in order to lower the surface temperature of the heater while keeping the hot water at a desired temperature, it is necessary to increase the heat exchange efficiency.

As a method for increasing the heat exchange rate, it is conceivable to configure the outer flow path and the inner flow path of the cylindrical heat generating element in a spiral shape in order to increase the flow velocity of water in contact with the heat generating element. For example, in Patent Document 1, in order to configure the inner flow path of a cylindrical heat generating element in a spiral shape, in the hollow portion of the cylindrical heat generating element, a shaft core member having a spiral protruding portion and a cylindrical and a flexible member (spring) that fills the gap between the inner peripheral surface of the heating element and the shaft core member.

JP 2017-180913 A

However, in the instantaneous heat exchanger of Patent Document 1, the shaft core member is formed integrally with the case through the lid. Since this lid is assembled to the case via packing, there is a risk that the position of the lid with respect to the case will vary. If the position of the lid varies in this way, the position of the shaft core member also varies, and there is a risk that the shaft core member will not be arranged in the center of the hollow portion of the cylindrical heating element.

When the shaft core member deviates from the center of the hollow portion of the cylindrical heat generating element, that is, when the shaft core member is arranged eccentrically with respect to the hollow portion of the cylindrical heat generating element, the shaft core member and the flexible A gap may occur between the flexible member and the inner peripheral surface of the cylindrical heating element. When such a gap occurs, water flows so as to make a shortcut in the inner flow path, reducing heat exchange efficiency and increasing the risk of scale formation.

The present invention has been made based on the recognition of this problem, and even when the inner flow path is formed by arranging the shaft core member in the hollow part of the cylindrical heat generating element, a gap is generated in the inner flow path. It is an object of the present invention to provide a momentary heat exchanger and a sanitary washing device with a high heat exchange rate that suppresses the occurrence of heat.

A first invention is a momentary heat exchanger that heats water into hot water, and comprises a cylindrical heating element having a hollow portion, and an outer peripheral surface of the heating element that covers the outer periphery of the heating element. a case forming an outer flow path therebetween; and an axial core member provided in the hollow portion of the heat generating element and forming an inner flow path between the inner peripheral surface of the heat generating element; The instantaneous heat exchanger is characterized in that the member is positioned relative to the heating element without being positioned by the case.

According to this instantaneous heat exchanger, since the shaft core member is not positioned by the case, the shaft core member may be arranged eccentrically with respect to the hollow portion of the cylindrical heat generating element due to variations in assembly of the case. It can be suppressed. Therefore, even when the inner flow path is formed by arranging the shaft core member in the hollow part of the cylindrical heating element, the occurrence of gaps in the inner flow path is suppressed, and the instantaneous heat exchange with high heat exchange rate is achieved. equipment can be provided.

A second invention is the instantaneous heat exchanger according to the first invention, wherein the axial core member is formed separately from the case and is not fixed to the case. .

According to this instantaneous heat exchanger, since the shaft core member is formed separately from the case, it is possible to prevent the shaft core member from being positioned by the case.

In a third invention based on the first or second invention, a gap between the shaft core member and the inner peripheral surface of the heat generator is filled with a coil spring, and the shaft core member is moved by the coil spring to the heat generator. A momentary heat exchanger characterized in that it is positioned with respect to the

According to this instantaneous heat exchanger, the force of the coil spring can be used to hold the shaft core member, and the shaft core member can be easily arranged in the center of the hollow portion of the cylindrical heating element. At the same time, it is possible to fill the gap between the shaft core member and the heat generating inner peripheral surface.

In a fourth aspect based on the third aspect, one end of the shaft core member is arranged away from the case, and the coil spring is engaged with an engaging portion provided at the one end of the shaft core member. Thus, the instantaneous heat exchanger is characterized in that movement of the shaft core member due to water flowing through the inner flow path is suppressed.

According to this instantaneous heat exchanger, it is possible to suppress the movement of the axial core member due to water pressure and the formation of a gap in the inner flow path.

In a fifth aspect based on any one of the first to third aspects, the case abuts on one end of the shaft member to prevent movement of the shaft member due to water flowing through the inner flow path. A momentary heat exchanger characterized by having a restraining abutment.

According to this instantaneous heat exchanger, it is possible to suppress the movement of the axial core member due to water pressure and the formation of a gap in the inner flow path.

According to a sixth invention, in the third or fourth invention, one end of the coil spring extends in the inner peripheral direction, and the other end of the coil spring extends in the outer peripheral direction. Exchanger.

According to this instantaneous heat exchanger, it is possible to achieve both connection of the water-conducting member to the heating element for flowing water to the heating element and holding of the coil spring when the coil spring is assembled to the heating element.

A seventh invention comprises the instantaneous heat exchanger of any one of the first to sixth inventions, and a nozzle for discharging hot water generated by the instantaneous heat exchanger toward a user's private part. This sanitary washing device is characterized by:

According to this sanitary washing device, since the shaft core member is not positioned by the case, the shaft core member is arranged eccentrically with respect to the hollow portion of the cylindrical heating element due to variations in assembly of the case. can be suppressed. Therefore, even when the inner flow passage is formed by arranging the shaft core member in the hollow portion of the cylindrical heat generating element, the sanitary washing device having a high heat exchange rate can be realized by suppressing the occurrence of a gap in the inner flow passage. can provide.

According to the aspect of the present invention, even when the inner flow path is formed by arranging the shaft core member in the hollow portion of the cylindrical heat generating element, the heat exchange rate is improved by suppressing the generation of the gap in the inner flow path. High instantaneous heat exchangers and sanitary washing devices are provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which represents typically the instantaneous heat exchanger which concerns on 1st Embodiment. FIG. 2 is an enlarged cross-sectional view schematically showing a part of the instantaneous heat exchanger according to the first embodiment; FIG. 2 is an enlarged cross-sectional view schematically showing a part of the instantaneous heat exchanger according to the first embodiment; 1 is a perspective view schematically showing a coil spring according to a first embodiment; FIG. FIG. 3 is a cross-sectional view schematically showing part of a heating element and a coil spring according to the first embodiment; FIGS. 6(a) and 6(b) are a perspective view and a cross-sectional view schematically showing part of the core member and the coil spring according to the first embodiment. It is a sectional view showing typically the modification of the instantaneous heat exchanger concerning a 1st embodiment. FIG. 3 is a perspective view schematically showing a toilet device according to a second embodiment; FIG. 3 is a block diagram schematically showing a sanitary washing device according to a second embodiment; FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In order to facilitate understanding, the same reference numerals are given to the same components in each drawing as much as possible, and redundant explanations are omitted.

(First embodiment)
FIG. 1 is a cross-sectional view schematically showing the instantaneous heat exchanger according to the first embodiment.
The instantaneous heat exchanger 10 (hereinafter referred to as the heat exchanger 10) according to the present embodiment warms water to produce hot water. It is provided in a sanitary washing device that is used to heat the washing water.

As shown in FIG. 1, the heat exchanger 10 includes a heating element 12, a case 14, a shaft core member 16, and a coil spring 18.

The heating element 12 is cylindrical with a hollow portion 12a. The heating element 12 is, in other words, a cylindrical heater. It should be noted that the heating element 12 does not have to be a perfect cylinder, and may have a portion where the thickness changes. The cross-sectional shape of the heating element 12 does not have to be perfectly circular, and may have an elliptical portion, a polygonal portion, or the like. The heating element 12 may have a substantially cylindrical outer shape.

The heating element 12 is, for example, a cylindrical ceramic heater. The heating element 12 includes, for example, an outer portion forming an outer peripheral surface 12b of the heating element 12, an inner portion forming an inner peripheral surface 12c of the heating element 12, and a heater portion provided between the inner portion and the outer portion. and have The inner part and the outer part are molded from ceramics. The heater section is in the form of a film in which a band-shaped heater pattern made of, for example, tungsten is sandwiched between insulating films. As a result, the heating element 12 can heat water in contact with the outer peripheral surface 12b and the inner peripheral surface 12c.

The case 14 covers the outer circumference of the heating element 12 . The case 14 has, for example, a case body 20 and a lid portion 22 . The case body 20 covers the outer periphery of the heating element 12 . The case body 20 is, for example, cylindrical with a diameter larger than that of the heating element 12 . The case body 20 has a hollow portion 20a that accommodates the heating element 12 . The heating element 12 is arranged substantially coaxially within the hollow portion 20a of the cylindrical case body 20, for example.

However, the shape of the case main body 20 may be any shape that can cover the outer periphery of the heating element 12 . For example, the case main body 20 may have a rectangular parallelepiped shape having a cylindrical hollow portion 20a capable of accommodating the heating element 12 therein.

One end of the heating element 12 is located inside one end of the case body 20 . In other words, one end of the heating element 12 is located inside the hollow portion 20a. On the other hand, the other end of the heating element 12 is positioned outside the other end of the case body 20 . However, the other end of the heating element 12 may be positioned inside the other end of the case body 20 .

The lid portion 22 is provided at one end of the case body 20 on the side where the heating element 12 does not protrude, and closes the one end of the cylindrical case body 20 . The lid portion 22 may be formed integrally with the case body 20, for example. The hollow portion 20a may have, for example, a bottomed hole shape with one end closed. The case 14 may be configured to accommodate the heating element 12 by means of a bottomed hole-shaped hollow portion 20a.

The shaft core member 16 is provided in the hollow portion 12 a of the heating element 12 . The shaft core member 16 is formed separately from the case 14 and is not fixed to the case 14 . The shaft core member 16 has, for example, a substantially columnar shape extending in the axial direction of the heating element 12 and is arranged substantially coaxially within the hollow portion 12 a of the cylindrical heating element 12 .

One ends of the heating element 12 and the core member 16 are arranged away from the case 14 . More specifically, one end of the heating element 12 and the core member 16 is arranged away from the lid portion 22 of the case 14 . A space between the heating element 12 and one end of the shaft core member 16 and the lid portion 22 serves as a path for water to flow between the inside and outside of the heating element 12 .

A coil spring 18 is provided between the shaft core member 16 and the inner peripheral surface 12c of the heating element 12 . The coil spring 18 is made of metal or resin, for example. The outer diameter of the coil spring 18 in its natural length state is slightly larger than the inner diameter of the inner peripheral surface 12c of the heating element 12 . The coil spring 18 is provided in the hollow portion 12a of the heating element 12 with its diameter slightly reduced by being twisted. As a result, the coil spring 18 abuts against the inner peripheral surface 12c of the heating element 12 and is held in the hollow portion 12a of the heating element 12 by its own elastic force that attempts to reduce the diameter.

FIG. 2 is an enlarged sectional view schematically showing part of the instantaneous heat exchanger according to the first embodiment.
As shown in FIGS. 1 and 2 , the case body 20 of the case 14 forms an outer flow path 30 between itself and the outer peripheral surface 12 b of the heating element 12 . The case body 20 has a projecting portion 20b. The protruding portion 20 b protrudes inward from the inner peripheral surface of the case body 20 and extends spirally along the axial direction of the case body 20 .

Heat exchanger 10 further comprises a coil spring 24 . The coil spring 24 is provided between the case body 20 and the outer peripheral surface 12b of the heating element 12. As shown in FIG. The coil spring 24 is made of metal or resin, for example. The inner diameter of the coil spring 24 in its natural length state is slightly smaller than the outer diameter of the outer peripheral surface 12b of the heating element 12 . The coil spring 24 is provided on the outer peripheral surface 12b of the heating element 12 with its diameter slightly increased by being twisted. As a result, the coil spring 24 abuts against the outer peripheral surface 12b of the heating element 12 and is held on the outer peripheral surface 12b of the heating element 12 by its own elastic force that attempts to reduce the diameter.

The inner diameter of the case main body 20 at the tip portion of the projecting portion 20 b of the case main body 20 is slightly larger than the outer diameter of the outer peripheral surface 12 b of the heating element 12 . Therefore, a slight gap is formed between the case main body 20 and the heating element 12 .

The thickness (diameter) of the wire of the coil spring 24 is larger than the distance of the gap between the case body 20 and the heating element 12 . Also, the pitch of the coil spring 24 is substantially the same as the pitch of the spiral protruding portion 20b. Thereby, the coil spring 24 closes the gap between the case body 20 and the outer peripheral surface 12 b of the heat generating element 12 .

The heating element 12 is supported by, for example, a case body 20 (case 14 ) and arranged substantially coaxially within a hollow portion 20 a of the cylindrical case body 20 .

As a result, the protrusion 20 b of the case body 20 and the coil spring 24 form a spiral outer flow path 30 . By making the outer flow path 30 spiral in this manner, the heat exchange rate between the water flowing through the outer flow path 30 and the heat generating element 12 can be increased. In addition, by forming the spiral outer flow path 30 using the coil spring 24, the effects of assembly errors and dimensional errors can be suppressed by the coil spring 24, and the spiral outer flow path 30 can be easily formed. .

FIG. 3 is an enlarged sectional view schematically showing part of the instantaneous heat exchanger according to the first embodiment.
As shown in FIGS. 1 and 3 , the shaft member 16 forms an inner flow path 32 between itself and the inner peripheral surface 12 c of the heating element 12 . The shaft core member 16 has a projecting portion 16a. The protruding portion 16 a protrudes outward from the outer peripheral surface of the shaft core member 16 and extends spirally along the axial direction of the shaft core member 16 .

The outer diameter of the shaft core member 16 at the distal end portion of the projecting portion 16 a of the shaft core member 16 is slightly smaller than the inner diameter of the inner peripheral surface 12 c of the heating element 12 . Therefore, a slight gap is formed between the shaft core member 16 and the heating element 12 .

The thickness (diameter) of the wire of the coil spring 18 is larger than the distance of the gap between the shaft core member 16 and the heating element 12 . Also, the pitch of the coil spring 18 is substantially the same as the pitch of the spiral protruding portion 16a. Thereby, the coil spring 18 closes the gap between the shaft core member 16 and the inner peripheral surface 12c of the heating element 12 .

The shaft core member 16 is, for example, not directly supported by the heating element 12 and the case body 20 (case 14), but supported by the heating element 12 via the coil spring 18. It is arranged substantially coaxially within the hollow portion 12 a of the body 12 . That is, the shaft core member 16 is positioned by the coil spring 18 without being positioned by the case 14 . Thus, the coil spring 18 fills the gap between the core member 16 and the inner peripheral surface 12 c of the heat generating body 12 , and the core member 16 is positioned with respect to the heat generating body 12 by the coil spring 18 .

As a result, the protrusion 16 a of the shaft core member 16 and the coil spring 18 form a spiral inner flow path 32 . By making the inner flow path 32 spiral in this manner, the heat exchange rate between the water flowing through the inner flow path 32 and the heating element 12 can be increased. In addition, by forming the spiral inner flow path 32 using the coil spring 18, the effects of assembly errors and dimensional errors can be suppressed by the coil spring 18, and the spiral inner flow path 32 can be easily formed. .

As shown in FIG. 1, the other end of the heating element 12 protruding outside the other end of the case body 20 is connected to a water-conducting member 2 for flowing water into the hollow portion 12a of the heating element 12. there is Further, the case main body 20 is provided with a water passage port 20c for flowing water into the hollow portion 20a of the case main body 20. As shown in FIG. The water passage port 20c is provided at the end of the case body 20 on the same side as the end of the heating element 12 to which the water passage member 2 is connected.

In the heat exchanger 10 , for example, water is supplied from the water-conducting member 2 into the hollow portion 12 a of the heating element 12 . The water supplied into the hollow portion 12 a flows through the inner flow path 32 toward the opposite end of the heating element 12 . At this time, the water flowing through the inner flow path 32 is heated by the heating element 12 by contacting the inner peripheral surface 12 c of the heating element 12 . The water that has flowed through the inner flow path 32 enters the outer flow path 30 through the space between the end portion of the heating element 12 in the hollow portion 20a of the case body 20 and the lid portion 22, and flows through the outer flow path 30. flow. Water flowing through the outer channel 30 is directed to the opposite end of the heating element 12 again. At this time, the water flowing through the outer flow path 30 is heated by the heat generating element 12 by contacting the outer peripheral surface 12 b of the heat generating element 12 . Then, the water that has flowed through the outer flow path 30 is discharged to the outside of the case main body 20 (heat exchanger 10) through the water passage port 20c.

As a result, the water supplied to the heat exchanger 10 through the water-conducting member 2 is heated by the heating element 12 and replaced with hot water, and the hot water is discharged from the heat exchanger 10 . In addition, contrary to the above, water may be supplied from the water passage port 20 c and the generated hot water may be discharged to the water passage member 2 .

A power supply terminal 12 d for supplying electric power to the heater portion of the heating element 12 is provided at the other end of the heating element 12 projecting outward from the other end of the case body 20 . In this manner, the power supply terminal 12d is provided at the end opposite to the end in contact with water. This prevents the power supply terminal 12d from being exposed to water.

FIG. 4 is a perspective view schematically showing the coil spring according to the first embodiment.
As shown in FIG. 4, one end 18a of the coil spring 18 extends in the inner circumferential direction. On the other hand, the other end 18b of the coil spring 18 extends in the outer peripheral direction.

As described above, the coil spring 18 is inserted into the hollow portion 12a of the heating element 12 with its diameter slightly reduced by being twisted. At this time, the coil spring 18 can be easily twisted by extending the one end 18a and the other end 18b and gripping the one end 18a and the other end 18b as described above. That is, the coil spring 18 can be easily inserted into the hollow portion 12a of the heating element 12 .

FIG. 5 is a cross-sectional view schematically showing part of the heating element and the coil spring according to the first embodiment.
As shown in FIG. 5, the other end 18b of the coil spring 18 extending in the outer peripheral direction is engaged with one end of the heating element 12 when inserted into the hollow portion 12a of the heating element 12. As shown in FIG. Thereby, the axial position of the coil spring 18 can be determined.

The axial lengths of the core member 16 and the coil spring 18 are shorter than the axial length of the heating element 12 (see FIG. 1). The shaft core member 16 and the coil spring 18 are attached to the end of the heating element 12 on the side in contact with water (the end opposite to the power supply terminal 12d). At this time, by engaging the other end 18b of the coil spring 18 with one end of the heat generating element 12 and determining the position of the coil spring 18 in the axial direction, a space for inserting the water-conducting member 2 is provided on the opposite side of the heat generating element 12. It can be suitably provided at the end.

FIGS. 6(a) and 6(b) are a perspective view and a cross-sectional view schematically showing part of the core member and the coil spring according to the first embodiment.
As shown in FIGS. 6A and 6B, the coil spring 18 engages with an engaging portion 16b provided at one end of the shaft core member 16. As shown in FIGS. The coil spring 18 engages with the engaging portion 16b of the axial core member 16 by one end 18a extending in the inner peripheral direction, for example.

When the coil spring 18 is attached to the shaft core member 16, for example, the helical projection 16a is screwed into the coil spring 18, and the shaft core member 16 is rotated so that the projection 16a and the coil spring 18 are aligned along the pitch. The core member 16 is inserted through the coil spring 18 . At this time, the shaft core member 16 is inserted through the engaging portion 16b side from the other end 18b side of the coil spring 18 . Then, while rotating the shaft core member 16, the inside of the coil spring 18 is advanced to the one end 18a side, and the engaging portion 16b is engaged with the one end 18a. Thereby, even when one end of the shaft core member 16 is separated from the case 14 , the position of the shaft core member 16 can be determined by the coil spring 18 .

The engaging portion 16b has an inclined surface 16c. The engaging portion 16b engages with one end 18a of the coil spring 18 to bring the inclined surface 16c into contact with the one end 18a of the coil spring 18, thereby moving the coil spring 18 from the one end 18a to the other end 18b along the inclination of the inclined surface 16c. Push in the direction you are going.

As a result, the engaging portion 16b presses the coil spring 18 against the projecting portion 16a. In other words, the engaging portion 16b presses the coil spring 18 against the projecting portion 16a by sandwiching a portion of the coil spring 18 between the inclined surface 16c of the engaging portion 16b and the projecting portion 16a. As a result, the coil spring 18 can be brought into close contact with the protruding portion 16 a by elastic force, and the gap between the shaft core member 16 and the inner peripheral surface 12 c of the heating element 12 can be more appropriately closed by the coil spring 18 .

Further, by bringing the coil spring 18 into close contact with the protruding portion 16a by elastic force, it is possible to suppress axial movement of the shaft core member 16. As shown in FIG. In this manner, the coil spring 18 engages with the engaging portion 16b provided at one end of the shaft core member 16 to suppress axial movement of the shaft core member 16 due to water flowing through the inner flow path 32 .

As described above, according to the heat exchanger 10 according to the present embodiment, since the shaft core member 16 is not positioned by the case 14, variations in the assembly of the case 14 cause the shaft core member 16 to generate heat in a cylindrical shape. It is possible to suppress eccentric arrangement with respect to the hollow portion 12 a of the body 12 . Therefore, even when the inner flow path 32 is formed by arranging the axial member 16 in the hollow portion 12a of the cylindrical heating element 12, the occurrence of a gap in the inner flow path 32 is suppressed, and the heat exchange rate is improved. A high heat exchanger 10 can be provided.

Further, in the heat exchanger 10 , the shaft core member 16 is formed separately from the case 14 , so the shaft core member 16 can be easily prevented from being positioned by the case 14 .

In the heat exchanger 10 , the coil spring 18 fills the gap between the core member 16 and the inner peripheral surface of the heat generating element 12 , and the coil spring 18 positions the core member 16 with respect to the heat generating element 12 . . As a result, the force of the coil spring 18 can be used to hold the shaft core member 16, and the shaft core member 16 can be easily arranged in the center of the hollow portion 12a of the cylindrical heating element 12. The gap between the axial core member 16 and the inner peripheral surface of the heating element 12 can be filled.

Further, in the heat exchanger 10, the coil spring 18 engages with the engaging portion 16b provided at one end of the shaft core member 16, thereby suppressing movement of the shaft core member 16 due to water flowing through the inner flow path 32. . As a result, even when one end of the shaft core member 16 is arranged away from the case 14 , it is possible to suppress the movement of the shaft core member 16 due to the water pressure and the formation of a gap in the inner flow path 32 . can.

In the heat exchanger 10, one end 18a of the coil spring 18 extends in the inner peripheral direction, and the other end 18b of the coil spring 18 extends in the outer peripheral direction. As a result, both the connection of the water-conducting member 2 to the heating element 12 for flowing water to the heating element 12 and the holding of the coil spring 18 when the coil spring 18 is assembled to the heating element 12 can be achieved.

FIG. 7 is a cross-sectional view schematically showing a modification of the instantaneous heat exchanger according to the first embodiment. It should be noted that the same reference numerals are given to the parts that are substantially the same as those of the above-described embodiment in terms of function and configuration, and detailed description thereof will be omitted.
As shown in FIG. 7, in the heat exchanger 10a, the case 14 contacts one end of the shaft member 16, thereby suppressing movement of the shaft member 16 due to water flowing through the inner flow path 32. It has a portion 22a. More specifically, the lid portion 22 of the case 14 has a contact portion 22a.

As a result, in this heat exchanger 10a, similarly to the heat exchanger 10 of the above-described embodiment, it is possible to suppress the movement of the shaft core member 16 due to water pressure and the formation of a gap in the inner flow path 32. .

It should be noted that, in each of the above-described embodiments, the axial member 16 is positioned with respect to the heating element 12 by the coil spring 18 . The method for positioning the core member 16 with respect to the heating element 12 is not limited to the above. For example, the shaft core member 16 may be held on the heating element 12 by a rubber member or the like that is separate from the shaft core member 16 . Alternatively, an elastically deforming portion may be provided in a part of the shaft core member 16 and the shaft core member 16 may be held by the heating element 12 using the elastic deformation portion. That is, the core member 16 may be held by the heating element 12 by a flexible member separate from the case 14 , such as a flexible member provided integrally with or separately from the core member 16 .

(Second embodiment)
FIG. 8 is a perspective view schematically showing the toilet device according to the second embodiment.
FIG. 9 is a block diagram schematically showing a sanitary washing device according to the second embodiment.
An example of a sanitary washing device including the heat exchanger according to the embodiment described above will be described below with reference to FIGS. 8 and 9. FIG.
As shown in FIG. 8 , the sanitary washing device 200 according to the present embodiment is installed on a western-style seated toilet bowl 301 in a toilet device 300 .

The sanitary washing device 200 includes a toilet seat 202 and a toilet lid 203 pivotally supported to a body portion 201 so as to be freely opened and closed, and a nozzle 204 . The nozzle 204 is provided so as to move back and forth from the body portion 201 into the bowl of the Western-style seated toilet 301 in response to a switch operation or the like by the user of the toilet device 300 . The sanitary washing device 200 sprays washing water from a spout provided at the tip of the nozzle 204 with the nozzle 204 extending into the bowl of the western-style seated toilet bowl 301 . The washing water jetted from the nozzle 204 washes the private parts of the human body.

As shown in FIG. 9, the sanitary washing device 200 supplies water supplied from a water supply source 205 such as a tap or a water storage tank to the heat exchanger 10 (or heat exchanger 10a) via a valve unit 206. As shown in FIG. Then, in the heat exchanger 10, the supplied water is heated to warm water, which is supplied to the nozzle 204 as washing water. The valve unit 206 has a valve mechanism such as an electromagnetic on-off valve and a pressure regulating valve that function as a water stop valve.

As described above, the sanitary washing device 200 according to the present embodiment includes the heat exchanger 10, uses hot water generated by the heat exchanger 10 as washing water, and discharges this washing water from the nozzle 204, thereby Wash the area. As described above, according to the sanitary washing device 200 including the heat exchanger 10 according to the present embodiment, it is possible to stably perform washing with hot water controlled to an appropriate temperature for the user. According to the sanitary washing device 200, even when the inner flow path 32 is formed by arranging the shaft core member 16 in the hollow portion 12a of the cylindrical heating element 12, the inner flow path 32 does not have a gap. can be suppressed, and the sanitary washing device 200 with a high heat exchange rate can be provided.

The embodiments of the present invention have been described above. However, the invention is not limited to these descriptions. Appropriate design changes made by those skilled in the art with respect to the above embodiments are also included in the scope of the present invention as long as they have the features of the present invention. For example, the shape, size, material, arrangement, etc. of each element included in the heat exchangers 10 and 10a and the sanitary washing device 200 are not limited to those illustrated and can be changed as appropriate.
Moreover, each element provided in each of the above-described embodiments can be combined as long as it is technically possible, and a combination of these is also included in the scope of the present invention as long as it includes the features of the present invention.

2 Water passage member 10 Instant heat exchanger 10a Heat exchanger 12 Heating element 12a Hollow part 12b Outer peripheral surface 12c Inner peripheral surface 12d Power supply terminal 14 Case 16 Shaft core member 16a Protruding part 16b engaging portion 16c inclined surface 18 coil spring 18a one end 18b other end 20 case main body 20a hollow portion 20b projecting portion 20c water passage 22 lid portion 22a contact portion 24 coil spring 30 outer flow Path 32 Inner channel 200 Sanitary washing device 201 Main body 202 Toilet seat 203 Toilet lid 204 Nozzle 205 Water supply source 206 Valve unit 300 Toilet device 301 Western-style seated toilet

Claims (6)

An instantaneous heat exchanger that heats water into hot water,
a cylindrical heating element having a hollow portion;
a case that covers the outer periphery of the heat generating element and forms an outer flow path between the heat generating element and the outer peripheral surface of the heat generating element;
an axial core member provided in the hollow portion of the heat generating element and forming an inner flow path between itself and the inner peripheral surface of the heat generating element;
with
the shaft core member is positioned with respect to the heating element without being positioned by the case ;
A gap between the shaft core member and the inner peripheral surface of the heating element is filled with a coil spring,
The shaft core member is positioned with respect to the heating element by the coil spring,
one end of the shaft core member is arranged away from the case,
The instantaneous heat generator is characterized in that the coil spring suppresses movement of the shaft core member due to water flowing through the inner flow path by engaging with an engaging portion provided at the one end of the shaft core member. exchanger. An instantaneous heat exchanger that heats water into hot water,
a cylindrical heating element having a hollow portion;
a case that covers the outer periphery of the heat generating element and forms an outer flow path between the heat generating element and the outer peripheral surface of the heat generating element;
an axial core member provided in the hollow portion of the heat generating element and forming an inner flow path between itself and the inner peripheral surface of the heat generating element;
with
the shaft core member is positioned with respect to the heating element without being positioned by the case;
A gap between the shaft core member and the inner peripheral surface of the heating element is filled with a coil spring,
The shaft core member is positioned with respect to the heating element by the coil spring,
One end of the coil spring extends in the inner peripheral direction,
A momentary heat exchanger, wherein the other end of the coil spring extends outward. 3. The instantaneous heat exchanger according to claim 1 , wherein said shaft core member is formed separately from said case and is not fixed to said case. 4. The case according to any one of claims 1 to 3, wherein the case has an abutting portion that abuts against one end of the shaft core member to suppress movement of the shaft core member due to water flowing through the inner flow path. 2. The instantaneous heat exchanger according to claim 1. one end of the shaft core member is arranged away from the case,
2. The coil spring suppresses movement of the shaft member due to water flowing through the inner flow path by engaging with an engaging portion provided at the one end of the shaft member. Momentary heat exchanger as described. a momentary heat exchanger according to any one of claims 1 to 5 ;
a nozzle for discharging hot water generated by the instantaneous heat exchanger toward the user's private part;
A sanitary washing device comprising:

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