JP2001115531A - Heat exchanger for sanitary washing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger for a sanitary washing equipment capable of preventing a damage to a heating heater by air bubble without creating temperature irregularity to the washing water. SOLUTION: A heat exchanger 20 comprises a hollow cylindrical heating tank 21 formed to a vertically long shape, an inlet 22 and an outlet 23 for washing water installed to the heating tank 21, a heating heater 24 inserted and arranged in the heating tank 21, and a temperature sensor 25 for detecting the temperature of washing water at the outlet 23 and further the heat exchanger 20 is vertically installed inside the casing 15 of the sanitary washing equipment B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a heat exchanger for heating a washing water for sanitarily cleaning a local part of a human body to an appropriate temperature.

[0002]

2. Description of the Related Art Conventionally, a sanitary washing apparatus A, which generally cleans a part of a human body in a sanitary manner by injecting washing water at an appropriate temperature, is connected to a water supply source (not shown) as shown in FIG. Solenoid valve 1, a flow control valve 2 for controlling the flow rate of washing water for local washing of the human body, a heat exchanger 3 for heating the washing water to an appropriate temperature, and a heat exchanger 3 for heating the washing water to an appropriate temperature. The electromagnetic valve 1 based on a signal from a nozzle device 4 for injecting the washed water toward a local part of the human body, an operating unit 5 of the sanitary washing device A and an adjusting unit 6 for adjusting the flow rate and temperature of the washing water. , A flow control valve 2, a heat exchanger 3, and a control device 7 for controlling the drive of the nozzle device 4.

The components of the solenoid valve 1, the flow control valve 2, the heat exchanger 3, the nozzle device 4, and the control device 7 are housed in a casing 15 attached to the upper back of the toilet 14 shown in FIG. Operating means 5 and adjusting means 6
Is provided on a sleeve 15a formed by extending the casing 15 forward.

Next, the structure of the heat exchanger 3 for heating the washing water to an appropriate temperature will be described with reference to FIG. In FIG. 8, reference numeral 8 denotes a horizontally long, bottomed, cylindrical, metal heating tank, into which a heater 9 made of a ceramic heater or the like is inserted and arranged. The heater 9 is formed in a hollow cylindrical shape by, for example, printing an electric heating element on the surface, and one end of the heater 9 is inserted into the heating tank 8 and a flange 9a formed on the other end. The heating tank 8 is mounted in the heating tank 8 with the opening 8a thereof closed.

[0005] Reference numeral 10 denotes a communication pipe fixed to the upper portion of the heating tank 8 on the opening 8a side so as to be able to communicate with the inside of the heating tank 8 through a through hole 11 opened near the opening 8a. Is provided with a temperature sensor 12 for detecting the temperature of the washing water in a state facing the through hole 11 of the heating tank 8, and a tap for supplying the washing water to the nozzle device 4 is provided in the middle part. Tube 13 is fastened.

In the sanitary washing apparatus A provided with the heat exchanger 3, when performing a local washing of a human body, a washing switch (not shown) of the operating means 5 is operated, and the electromagnetic valve 1 is operated.
Is opened, and washing water is supplied to the heat exchanger 3 via the flow rate control valve 2 from a water supply source (not shown). The washing water supplied to the heat exchanger 3 flows into the heating tank 8 through the inside of the hollow cylindrical heater 9 and is heated to a predetermined temperature by contacting the outer peripheral surface of the heater 9. , Out of the through hole 11.

The temperature of the washing water flowing out of the through hole 11 is detected by a temperature sensor 12 mounted on the upper part of the communication pipe 10 facing the through hole 11, and is compared with a preset temperature set by the adjusting means 6. You. Then, according to the result of comparison between the detected temperature and the set temperature, energization control of the heater 9 is performed to maintain the cleaning water at a constant temperature (set temperature). The cleaning water heated by the heater 9 and flowing out of the through hole 11 is connected to the communication pipe 10 → the tapping pipe 1.
The liquid is supplied to the nozzle device 4 through the nozzle 3 and is injected from the nozzle device 4 toward a local part of the human body.

[0008]

However, in the heat exchanger configured as described above, the flow path between the heater and the heating tank is formed relatively wide.
Although the cleaning water flowing close to the heater can be satisfactorily heated, it is difficult to sufficiently heat the cleaning water flowing away from the heater, and as a result, the cleaning water in the heating tank is partially heated. A temperature difference is generated in the nozzle, and the washing water having the temperature difference is supplied to the nozzle device through the through hole → the communication pipe → the tapping pipe. The temperature of the washing water is detected by a temperature sensor attached to the upper part of the communication pipe facing the through hole, but since the washing water has a partial temperature difference, the temperature sensor detects the temperature of the washing water. It is difficult to always detect at a constant temperature, and as a result, it has been difficult to maintain and control the temperature of the washing water well.

In order to solve the above problem, it is conceivable to narrow the flow path between the heating tank and the heater. In this case, however, the cleaning water is brought into good contact with the heater and heated. Therefore, it is possible to prevent unevenness in the temperature of the washing water detected by the temperature sensor. On the other hand, as shown in FIG. 8, heat exchange is performed by disposing a heater in a horizontal heating tank in a horizontal direction. In the case of a vessel, bubbles entering the heating tank at the time of supplying the cleaning water, bubbles generated when the cleaning water is heated by the heater, and the like are likely to stay in a narrow flow path in the heating tank, As a result, there is a problem that the heater is damaged by the air bubbles coming into contact with the electric heating element printed on the surface of the heater for a long time.

In view of the above-mentioned various problems, the present invention can supply the cleaning water without causing unevenness in the temperature, and can surely prevent the heater from being damaged by bubbles. An object of the present invention is to provide a heat exchanger for a sanitary washing device.

[0011]

According to a first aspect of the present invention, there is provided a heat exchanger comprising: a vertically long hollow cylindrical heating tank; and a washing water provided in the heating tank. It comprises an inlet and an outlet, a heater inserted and arranged in the heating tank, and a temperature sensor for detecting the temperature of the washing water at the outlet, and furthermore, the heat exchanger is arranged vertically. It is characterized by doing.

[0012] Further, the heating heater narrows the gap with the inner wall surface of the heating tank and makes the gap a uniform width.
It is characterized by being arranged in an upright state in a central part in the heating tank.

Further, the upper part of the heating tank is formed in a mortar shape toward the water outlet.

According to a fourth aspect of the present invention, there is provided a heat exchanger, wherein a first heater is inserted and disposed in a heating chamber having an inlet for washing water, the heater being configured to heat the washing water. A second heating means configured by inserting and arranging a heater for heating the cleaning water in a heating tank having a water outlet for water and a temperature sensor for detecting a temperature of the cleaning water at the water outlet, The first heating means is arranged in a horizontal state, and the second heating means is arranged in a vertical state.

Further, in the heat exchanger according to the fifth aspect, a hot water storage chamber for storing heated cleaning water and a heater for heating the cleaning water are inserted and arranged in a heating chamber having a water inlet for cleaning water. A first heating means configured as described above, and a heater for heating the washing water are inserted and arranged in a heating tank having a washing water outlet and a temperature sensor for detecting the temperature of the washing water at the outlet. And a second heating means configured to arrange the first heating means in a horizontal state in the hot water storage chamber and to arrange the second heating means in a vertical state adjacent to the hot water storage chamber. It is characterized by.

Further, the heater of the first heating means is disposed in the heating chamber in a state where a gap between the heating chamber and the upper side is wide and a gap between the heating chamber and the lower side is narrow. It is characterized by.

Further, the heater of the second heating means is arranged in a standing state at a central portion in the heating tank so as to narrow the gap with the inner wall surface of the heating tank and make the gap uniform. It is characterized by having done.

Further, the upper part of the heating tank of the second heating means is formed in a mortar shape toward the water outlet.

According to the present invention, since the heater is inserted and arranged in a vertically elongated hollow cylindrical heating tank in a uniform flow path width and in an upright state, the washing water flowing from the water inlet is provided. Flows out of the water outlet without causing temperature unevenness. Further, even if bubbles are generated, the bubbles can be removed from the water outlet without staying in the heating tank, so that damage to the heater can be reliably prevented.

Further, since the heat exchanger is provided with the first heating means arranged in the horizontal state and the second heating means arranged in the vertical state, the temperature heated by the first heating means is increased. The uneven cleaning water can be heated to a constant temperature by the second heating means. Further, since the washing water is heated in two stages by the first and second heating means, it is possible to reduce the size of the heat exchanger itself.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In FIG. 1, the same members as those of the related art are described by the same reference numerals.

In FIG. 1, reference numeral 20 denotes a heat exchanger provided in the sanitary washing apparatus B of the present invention. As shown in FIG. Water inlet 22 formed on the lower side surface of cleaning water 21
A washing water outlet 23 formed in the upper end surface of the heating tank 21; and a heater 24 inserted and arranged in the heating tank 21 (for example, a hollow formed by printing an electric heating element on the surface or the like). Cylindrical ceramic heater)
A temperature sensor 25 for detecting the temperature of the washing water flowing out of a water outlet 23 attached to the upper part of the heating tank 21.
Are provided.

In the upper part of the heating tank 21, the water outlet 23 is formed to have a diameter smaller than that of the inner wall surface of the heating tank 21 so that the water outlet 2 is formed from the inner wall surface of the heating tank 21.
It is formed in a mortar shape toward 3. Further, at the end (upper side in FIG. 2) of the heater 24 inserted into the heating tank 21, the washing water flowing in the heating tank 21 is prevented from flowing back into the hollow heater 24. Cover 24c is attached.

Next, referring to FIG.
The case where 0 is assembled will be described. First, a heater 24 is provided in the heating tank 21 through an opening 21a opened at a lower portion of the hollow cylindrical heating tank 21 so that the gap between the heating tank 21 and the inner wall surface of the heating tank 21 is narrow and has a uniform width. And insert it in the upright (vertical) state. Then,
A flange portion 24a formed on the heater 24 is brought into contact with a lower end surface of the heating tank 21 via a seal member 21d, and in this state, the flange portion 24a is fastened using a fastening member 24b.
a to the lower end surface of the heating tank 21 by tightening
The opening 21a is closed watertight.

Thereafter, a temperature sensor 25 is inserted into the insertion hole 21b formed in the upper side wall surface of the heating tank 21 by the temperature sensor 25.
5a is inserted with the washing water facing the water outlet 23 side,
By fixing this using a fastening member (not shown) or the like, the assembly of the heat exchanger 20 is completed.

Next, as shown in FIG. 2, the heat exchanger 20 assembled as described above has a plurality of flange pieces 21c formed at the lower edge of the heating tank 21 (only one flange piece 21c is shown in FIG. 2). The fastening member 26a is attached to the mounting boss 26 standing upright inside the casing 15 (see FIG. 6) of the sanitary washing device B.
The casing 1 is fastened and fixed by using
5 is mounted vertically (standing).

As shown in FIGS. 1 and 2, the water inlet 22 of the heat exchanger 20 is connected to a water supply source (not shown) via a solenoid valve 1 and a flow control valve 2, and the water outlet 23 is connected to a nozzle device. 4, the sanitary washing device B is configured.

Next, the operation of the present invention will be described. First, in performing the local cleaning of the human body, the operating means 5 is used.
When the cleaning switch (not shown) is operated, the electromagnetic valve 1 is opened, and cleaning water is supplied to the heat exchanger 20 from a water supply source (not shown). At the same time when the solenoid valve 1 is opened, the energization of the heater 24 is started.

Subsequently, the washing water supplied from the water supply source (not shown) to the heat exchanger 20 flows into the heating tank 21 from the water inlet 22 as shown by the arrow in FIG. Through the narrow flow path (gap) formed between the inner wall surface of the heater and the heater 24, the fluid flows upward from below while contacting the heater 24, and is heated to the set temperature. leak.

The temperature of the washing water heated by the heater 24 is detected by a temperature sensor 25 mounted with the detecting section 25a facing the water outlet 23, and the temperature detected by the temperature sensor 25 is adjusted. By comparing the temperature with the set temperature set by the means 6, the energization of the heater 24 is controlled, and the cleaning water is always supplied to the nozzle device 4 at a constant temperature (set temperature).

At this time, since the heater 24 is mounted in a state where the gap (flow path) with the inner wall surface of the heating tank 21 is narrow and has a uniform width, the heating heater 24 is connected to the inside of the heating tank 21 through the water inlet 22. The cleaning water flowing into the heater is evenly contacted with the heater 24, so that the cleaning water is heated to a uniform temperature without causing temperature unevenness. Therefore, the temperature sensor 25 can always detect the washing water at a constant temperature, and can control the temperature of the washing water satisfactorily.

Further, since the heat exchanger 20 is vertically mounted in the casing 15 of the sanitary washing device B, bubbles entering the heating tank 21 when the washing water is supplied, or the washing water is heated by the heater. Bubbles generated when heated by the heating tank 24 rise in the flow path in the heating tank 21 without staying in the heating tank 21, and satisfactorily
Since the air bubbles are exhausted outside, it is possible to reliably prevent the heater 24 from being damaged due to the air bubbles coming into contact with the electric heating element on the surface of the heater 24 for a long time.

Further, the washing water and the bubbles flowing and ascending in the flow path in the heating tank 21 are stagnant because the upper part in the heating tank 21 is formed in a mortar shape toward the water outlet 23. Without being guided to the flood outlet 23 side,
The water can be satisfactorily discharged from the water outlet 23.

The washing water heated to the set temperature by the heater 24 flows out of the water outlet 23 and is supplied to the nozzle device 4 to be jetted from the nozzle device 4 toward a local part of the human body. You.

As described above, the heat exchanger 20 of the present invention
Vertical (standing state) inside the casing 15 of the sanitary washing device B
Is attached to the heating tank 21, bubbles that enter the heating tank 21 when the washing water is supplied from a water supply source (not shown), and bubbles that are generated when the washing water is heated by the heater 24. Without staying in
Since the bubble rises along the flow path and is discharged from the water outlet 23 to the outside of the heating tank 21, it is possible to prevent the heater 24 from being damaged by the air bubbles being in contact with the electric heating element on the surface of the heater 24 for a long time. Can be reliably prevented.

Also, as described above, bubbles are heated in the heating tank 21.
Since the cleaning water can be discharged to the outside without staying in the inside, the flow path of the washing water (the heating tank 21 and the heater 24)
And the uniform width of the flow path, the entire washing water flowing into the heating tank 21 can be reliably brought into contact with the heater 24 and heated. Therefore, there is no unevenness in the temperature of the washing water, and as a result, the temperature sensor 25 can always detect the washing water at a constant temperature, and can control the temperature of the washing water satisfactorily.

Next, the second embodiment of the present invention will be described with reference to FIGS.
An embodiment will be described. 3 and 4, the same members as those in the prior art and the first embodiment are described by the same reference numerals.

As shown in FIGS. 3 and 4, the heat exchanger 30 according to the second embodiment includes, for example, a first heating means 31 disposed in a horizontal state in a hot water storage chamber 33, A second heating means 32 disposed adjacently and vertically.
The first heating means 31 and the second heating means are connected to each other, and the second heating means 32 and the hot water storage chamber 33 are connected to each other.

Since the structure of the second heating means 32 is the same as that of the heat exchanger 20 of the first embodiment, a description thereof will be omitted, and the structure of the first heating means 31 will be described here. Only the water inlet 22 in the first embodiment will be described as a communication hole 40 communicating the first heating means 31 and the second heating means 32, and a water outlet in the first embodiment. 23 is the second heating means 32 and the hot water storage chamber 3
3).

As shown in FIG. 4, the first heating means 31 is a hollow cylinder attached near the bottom of a hot water storage chamber 33 for storing the washing water heated by the first and second heating means 31, 32. A heating chamber 34 formed of a copper pipe in a shape of a circle, a water inlet 35 for supplying cleaning water into the heating chamber 34, and a heater 37 inserted and arranged in the heating chamber 34 (for example,
And a hollow cylindrical ceramic heater formed by printing an electric heating element on the surface.

As shown in FIG. 4, the washing water flowing from the water inlet 35 flows into the hollow cylindrical heater 37 at the tip (right side in FIG. 4) of the heater 37. A blind lid 37c is attached to prevent this. Also,
In FIG. 4, reference numeral 36 denotes a flush water outlet formed in the upper end surface of the hot water storage chamber 33, 38 denotes a temperature sensor for detecting the temperature of the wash water in the hot water storage chamber 33 (only a part is shown), and 39 denotes the wash water. This is a float switch to prevent empty burning.

Next, a case where the heat exchanger 30 is assembled will be described with reference to FIGS. First, as shown in FIG. 4, one end (left side in FIG. 4) of the hollow cylindrical heating chamber 34 is fitted into a concave portion 33 b formed in the lower left side of the hot water storage chamber 33, and The other end (right side in FIG. 4) of 34 is fitted into a recess 32 a formed in the lower left side of the second heating means 32, so that the heating chamber 34 is slanted right near the bottom of the hot water storage chamber 33. Support and fix in an upward position.

The right end face of the hot water storage chamber 33 (FIG. 4)
4) and the left end surface of the second heating means 32 (the left side in FIG. 4) via a seal member 42, and in this state, the contact surface is subjected to ultrasonic welding or the like, thereby achieving watertightness. To join. Thereby, the first heating means 31 is communicated with the second heating means 32 via the communication hole 40, and the second heating means 32 is communicated with the hot water storage chamber 33 via the communication passage 41. .

Subsequently, the heater 37 is connected to the heating chamber 3.
4, an opening 33a opened on the lower left side of the hot water storage chamber 33
Insert from. In this case, the heater 37 is provided as shown in FIG.
As shown in the figure, the gap t between the upper side and the heating chamber 34
₁ is larger than the gap t ₂ between the lower side and the heating chamber 34 (t
_1> t ₂₎ is inserted so as to be. Then, the flange 37a formed on the heater 37 is brought into contact with the lower left side surface of the hot water storage chamber 33 via a seal member 33c, and in this state, the flange 37a is tightened using the fastening member 37b. The opening 33a is closed in a watertight manner by fastening to the lower left side surface of the opening 33a.

Thereafter, the temperature sensor 3
The heat exchanger 33 and the float switch 39 are inserted into the hot water storage chamber 33 and fastened and fixed by a fastening member (not shown), thereby completing the assembly of the heat exchanger 33. The assembling of the second heating means 32 is the same as in the first embodiment, and a description thereof will be omitted.

Next, the operation of the second embodiment will be described. First, when the sanitary washing device C is not used, the washing water in the hot water storage chamber 33 is supplied to the heater 3 of the first heating means 31.
7 is heated through the heating chamber 34 by energizing. Therefore, even when the local cleaning of the human body is started or when the sanitary cleaning device C is used continuously for a short time, the cleaning water stored and kept in the hot water storage chamber 33 is supplied to the nozzle device 4. No cold water is sprayed from the nozzle device 4 toward a local part of the human body.

When a cleaning switch (not shown) of the operating means 5 is operated in the above state, the electromagnetic valve 1 is opened, and cleaning water is supplied to the heat exchanger 30 from a water supply source (not shown). The washing water is supplied from the water inlet 35 to the first heating means 3.
1, the heating chamber 34 and the heater 3
As shown by an arrow in FIG. 4, the flow path (gap) formed between the heater and the heater 7 contacts the heater 37 while flowing from the left side to the right side, and heats to a temperature slightly lower than the set temperature. Is done. The temperature of the washing water flowing into the heating chamber 34 is detected by a temperature sensor 42 (see FIG. 3), and based on the detected temperature, for example, the heater is set so that the washing water has a temperature slightly lower than a set temperature. The power supply to the 37 is controlled.

At this time, as shown in FIG. 5, the heater 37 has a gap t ₁ between its upper side and the heating chamber 34.
Since it is attached in a state where it is wider than the gap t ₂ between the lower side and the heating chamber 34, when the cleaning water is heated by the heater 37, bubbles entering the heating chamber 34 at the time of supplying the cleaning water and cleaning water are heated. The generated air bubbles and the like are collected on the upper side of the heating chamber 34 having a large distance from the heater 37, and the heating chamber 34 is fixed in a state of being obliquely upward to the right. Move to the side of the heating tank 21 of the heating means 32, the bubbles come into contact with the electric heating element on the surface of the heater 37 for a long time, and the heater 37
The washing water can be heated without causing any damage to the washing water.

The bubbles moved to the side of the heating tank 21 of the second heating means 32 rise in a flow path in the heating tank 21 (a gap between the inner wall surface of the heating tank 21 and the outer peripheral surface of the heater 24). Since the electric heating element is discharged out of the heating tank 21, the electric heating element on the surface of the heating heater 24 of the second heating means 32 is not damaged at all by long-time contact with bubbles.

Subsequently, as described above, the washing water heated to a temperature slightly lower than the set temperature by the first heating means 31 is supplied to the heating tank 21 of the second heating means 32 through the communication hole 40. Flows into. The washing water that has flowed into the heating tank 21 flows through a narrow, uniform-width flow path (gap between the heating tank 21 and the heater 24) from below to above as shown by arrows in FIG. By flowing toward the heater, the heater 24 heats the heater to the set temperature. The temperature of the washing water is detected by a temperature sensor 25 attached with the detection unit 25a facing the communication path 41,
By comparing the detected temperature with the set temperature, the energization control to the heater 24 is performed so that the cleaning water reaches the set temperature.

The cleaning water heated by the first heating means 31 has a larger gap between the inner peripheral surface of the heating chamber 34 and the outer peripheral surface of the heater 37 (t ₁ ).
And by the lower side (t ₂₎ the de Mixed (t _1> t _2), the temperature unevenness occurs in (i.e., tends to warm towards the gap is narrow lower side, the direction of the gap is wide upper side The temperature of the cleaning water in the heating chamber 34 is different due to the difficulty in warming). The cleaning water flows into the heating tank 21 of the second heating means 32 in a state where the cleaning water is narrow. In addition, by flowing through the flow path having a uniform width and making uniform contact with the heater 24, temperature unevenness generated in the first heating means 31 can be eliminated and the temperature can be kept constant.

The washing water heated by the second heating means 32 and having a constant temperature flows into the hot water storage chamber 33 through the communication passage 41. As a result, the wash water stored in the hot water storage chamber 33 is pushed out from the water outlet 36 and supplied to the nozzle device 4, and is sprayed from the nozzle device 4 toward a local part of the human body.

As described above, in the second embodiment, the cleaning water heated by the first heating means 31 arranged in the horizontal state and having uneven temperature is applied to the second heating means arranged in the vertical state. By performing reheating by the cleaning device 32, the temperature of the cleaning water flowing out from the second heating unit 32 can be kept constant. Moreover, the first and second heating means 3
By heating the washing water in two stages using the heaters 1 and 32, the heaters 24 and 37 of the heaters 31 and 32 are heated.
Can be reduced in size, and as a result, the heat exchanger 3
0 itself can be downsized.

Further, since the first heating means 31 is provided in the hot water storage chamber 33, when the sanitary washing device C is not used, the heater 37 of the first heating means 31 is energized. Since the washing water in the hot water storage chamber 33 can be kept warm via the first heating means 31, when the sanitary washing device C is used at the start of local washing of the human body or continuously for a short time, cool washing water is used. Can be satisfactorily prevented from being sprayed toward a local part of the human body.

In the second embodiment, the first
Although the description has been made with reference to the example in which the heating means 31 is disposed in the hot water storage chamber 33 in a horizontal state, the present invention is not limited to this. It goes without saying that the same effect as described above can be obtained even if the heat exchanger is constituted by the second heating means.

[0056]

As described above, according to the present invention, a heat exchanger is constructed by inserting and arranging a heater in an upright state in a vertically long heating tank, and further comprising a sanitary washing device for mounting the heat exchanger. Because it is mounted in a vertical state in the casing, even if bubbles enter when the cleaning water is supplied into the heating tank, or bubbles are generated when the cleaning water is heated by the heater, Since the bubbles are discharged to the outside without staying in the heating tank by ascending the flow path in the heating tank, the bubbles are brought into contact with the electric heating element on the surface of the heating heater for a long time, thereby causing the heating. The heater can be reliably prevented from being damaged.

Further, as described above, bubbles flowing into the heating tank together with the cleaning water and bubbles generated when the cleaning water is heated by the heater are discharged out of the heating tank without staying in the heating tank. Therefore, the gap (flow path) between the heating tank and the heater can be narrowed, and the uniform width of the flow path allows the washing water flowing into the heating tank to be evenly distributed to the heating heater. It can be heated to a uniform temperature without causing temperature unevenness due to contact. Therefore, the temperature of the washing water detected by the temperature sensor is always constant, so that the temperature of the washing water can be favorably controlled.

Further, since the upper part in the heating tank is formed in a mortar shape toward the water outlet, the washing water and the bubbles flowing and rising in the flow path in the heating tank stay in the heating tank. Without being guided to the water outlet side, the water can flow out of the heating tank from the water outlet.

Further, in the second embodiment, the first heating means arranged in a horizontal state is provided with the heater and the heating chamber in order to prevent the heater from being damaged by air bubbles being in contact for a long time. Since the gap is configured such that the upper portion is widened and the lower portion is narrowed, the cleaning water heated by the first heating means has temperature unevenness. By arranging the second heating means having a narrow gap between the heater and the heating tank and having a uniform width in a vertical state, the washing water having the temperature unevenness is supplied to the heater by the second heating means. It can be evenly contacted and heated to a uniform temperature.

In addition, as described above, the cleaning water is heated in two stages by the first and second heating means, so that each heater of each heating means can be downsized. As a result, the size of the heat exchanger itself can be reduced.

Further, since the first heating means is formed in the hot water storage chamber, when the sanitary washing device is not used, the first heating means is energized to maintain the temperature of the cleaning water in the hot water storage chamber. Therefore, when the local cleaning of the human body is started or when the sanitary cleaning device is used continuously for a short time, the cold cleaning water is not sprayed toward the local part of the human body.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a sanitary washing device including a heat exchanger of the present invention.

FIG. 2 is a longitudinal sectional view of the heat exchanger of the present invention.

FIG. 3 is a schematic configuration diagram of a sanitary washing device including a heat exchanger according to a second embodiment of the present invention.

FIG. 4 is a longitudinal sectional view of a heat exchanger according to a second embodiment.

FIG. 5 is a longitudinal sectional view illustrating a main part of a heat exchanger according to a second embodiment.

FIG. 6 is a perspective view showing a state in which the sanitary washing device is attached to a toilet.

FIG. 7 is a schematic configuration diagram of a sanitary washing device including a conventional heat exchanger.

FIG. 8 is a longitudinal sectional view of a conventional heat exchanger.

[Explanation of symbols]

 B, C Sanitary washing device 20, 30 Heat exchanger 21 Heating tank 24 Heater 25 Temperature sensor 31 First heating means 32 Second heating means 33 Hot water storage chamber 34 Heating chamber 37 Heater 38 Temperature sensor 40 Communication hole 41 Continuous Passageway 42 Temperature sensor

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tetsuya Hayashi 1 Aichi-cho, Aichi-cho, Kasugai-shi, Aichi Prefecture (72) Inventor Minoru Matsui 1-Aichi-cho, Aichi-cho, Kasugai-shi, Aichi F Term (Reference) 2D038 JB03

Claims (8)

[Claims] 1. A sanitary washing device in which cleaning water heated to an appropriate temperature is injected to clean a local part of a human body in a sanitary manner, wherein the heat exchanger for heating the washing water to an appropriate temperature has a vertically long hollow. A cylindrical heating tank, an inlet and an outlet for washing water provided in the heating tank, and inserted into the heating tank.
The sanitary washing device further comprises a heater disposed therein, and a temperature sensor for detecting a temperature of the washing water at the water outlet, and further comprising the heat exchanger arranged vertically. Heat exchanger. 2. The heating heater according to claim 1, wherein a gap between the heating heater and an inner wall surface of the heating tank is narrowed, and the gap has a uniform width. A heat exchanger for a sanitary washing device according to claim 1. 3. The heat exchanger according to claim 1, wherein an upper portion of the heating tank is formed in a mortar shape toward the water outlet. 4. A sanitary washing apparatus in which cleaning water heated to an appropriate temperature is injected to sanitarily clean a local part of a human body, wherein the heat exchanger for heating the washing water to an appropriate temperature comprises an inlet for the washing water. A first heating unit configured by inserting and arranging a heater for heating the cleaning water in a heating chamber having: a heating water outlet and a temperature sensor for detecting a temperature of the cleaning water at the water outlet; A second heater configured to insert and dispose a heater for heating the cleaning water in the tank, wherein the first heater is kept in a horizontal state by the second heater.
A heat exchanger for a sanitary washing device, wherein the heating means are arranged vertically. 5. A sanitary washing apparatus in which washing water heated to an appropriate temperature is sprayed to sanitarily clean a local part of a human body, wherein the heat exchanger for heating the washing water to an appropriate temperature comprises a heated washing water. First heating means configured by inserting and arranging a heater for heating the washing water in a heating chamber having a water inlet for washing water and a heating chamber having an inlet for washing water; A second heating means configured to insert and arrange a heater for heating the washing water in a heating tank having a temperature sensor for detecting the temperature of the washing water,
The heat exchanger for a sanitary washing device, wherein the first heating means is arranged in a horizontal state in a hot water storage chamber, and the second heating means is arranged in a vertical state adjacent to the hot water storage chamber. . 6. The heater of the first heating means is disposed in the heating chamber in a state where a gap between the heating chamber and the upper side is wide and a gap between the heating chamber and the lower side is narrow. The heat exchanger for a sanitary washing device according to claim 4 or 5, wherein: 7. The heating heater of the second heating means is arranged in a standing state at a central portion in the heating tank so as to narrow a gap with an inner wall surface of the heating tank and make the gap uniform width. The heat exchanger for a sanitary washing device according to claim 4, wherein the heat exchanger is used. 8. The heat exchanger for a sanitary washing device according to claim 4, wherein an upper portion of the heating tank of the second heating means is formed in a mortar shape toward a water outlet.