JP3421301B2 - Heat exchange equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sanitary washing device that instantly heats wash water up to a predetermined temperature to make hot water that can be used, and sprays the hot water toward a local area. The present invention relates to an improvement of an instantaneous heating type heat exchange device capable of accurately detecting heat.

[0002]

2. Description of the Related Art A general sanitary washing device for local washing has a structure in which a hot water heating device, a nozzle device, etc. are incorporated in a casing and the casing is fixed to the toilet body for use. An example thereof is shown in FIG.
In FIG. 7, a toilet seat 52 and a toilet lid 53 are openably and closably attached to a casing 51 attached to the back of the upper surface of the toilet bowl 50, and the casing 51 is provided with a nozzle 54 that moves underneath the toilet seat 52 to advance and retract. There is. Between the nozzle 54 and the water supply pipe 55 connected to the rear portion of the casing 51, a solenoid valve 56 having a built-in pressure regulating valve, and an instantaneous heating type heat accommodating a heater and a temperature sensor in a cylindrical case are provided. This instantaneous heating type heat exchanger 57 is connected to the exchanger 57 by pipe connection.
The sanitary washing device 58 is roughly configured by installing the above in the casing 51.

Next, as the instantaneous heating type heat exchanger 57 used in the sanitary washing device 58, there is, for example, the one described in Japanese Utility Model Publication No. 1-24757, the structure of which is shown in FIG. explain. The heat exchanger 57 shown in FIG.
It is composed of a metal heating tank 61 formed in a bottomed tubular shape and a synthetic resin hot water storage tube 62 formed in a hollow tubular shape. The heating tank 61 is inside a hot water storage tube 62 and a hot water storage section 62 is provided above it.
The heating tank 61 is housed so as to have an opening a, and the opening end side of the heating tank 61 is fitted into one opening of the hot water storage cylinder 62, and the heating tank 61 is heated through a through hole 63 opened at the peripheral edge on the opening end side. The tank 61 and the hot water storage cylinder 62 communicate with each other. Continuing,
A hollow cylindrical heater 64 formed by printing a heating element on the surface of the heating tank 61 is connected to a water supply line (not shown) so as to be loosely fitted, and then one opening of the hot water storage cylinder 62 is opened to the heater 64. Closed at the collar of this hot water storage cylinder 6
The other opening of No. 2 is configured by closing a box 68 of a safety device 67 including a float switch 65 and a vacuum switch 66 in a state where the box 68 and the hot water storage tube 62 are in communication with each other. Has been done.

When the wash water is passed through the heat exchanger 57 when the hot water used for the local washing is generated, the wash water flows into the heater 64, the heating tank 61 and the hot water storage tube 62, and the hot water storage tube 62. When the inside reaches a predetermined water level, the float switch 65 operates to fully energize the heater 64, and the cleaning water flowing between the outer peripheral surface of the heater 64 and the heating tank 61 is set by a controller (not shown). It is heated to a predetermined temperature, and this is stored in the hot water storage tube 62 → the box 68 of the safety device 67.
→ It is fed to the nozzle 54 through the hot water pipe 69, ejected from the nozzle 54 and used for local cleaning. Prior to supplying the wash water, most of the wash water retained in the hot water storage cylinder 62 and the heating tank 61 is kept at an appropriate temperature by the heater 64.

[0005]

However, in the heat exchanger 57 having the above structure, as shown in FIG. 8, the temperature of the hot water heated by the heater 64 is provided above the through hole 63 opened in the heating tank 61. A temperature sensor 70 for detection is attached, and the temperature of hot water generated by energization of the heater 64 is always detected, and the detection signal is sent to a control device so that the detected temperature becomes higher than the set temperature. When the temperature is low, the heater 64 is energized and controlled by a command from the control device to constantly maintain the hot water at the set temperature. And
When wash water (cold water) flows into the heat exchanger 57 during local washing, the appropriate temperature water retained in the heat exchanger 57 is thereby pushed out from the heat exchanger 57 as it is and jetted from the nozzle 54. The newly supplied wash water is heated to an appropriate temperature by the heater 64, which is energized and controlled by a command from the controller, and is ejected from the nozzle 54.

In this case, that is, in the position directly below the through hole 63 of the heating tank 61, the wash water, which is less likely to be heated by the heater 64, stays at a temperature below the set temperature, and this low temperature water is When the washing water is pushed up to the side of the through hole 63 and comes into contact with the temperature sensor 70, the temperature sensor 70 detects the temperature of the low-temperature water. As a result, since the detected temperature is considerably lower than the set temperature, the heater 64 continues full energization according to a command from the controller,
Even though the proper temperature water has been ejected from the nozzle 54, the hot water having a temperature higher than the set temperature is suddenly ejected. Then, when hot water having a temperature higher than the set temperature is jetted, the temperature sensor 70 detects this and a command for stopping the energization of the heater 64 is sent from the control device, and the energization of the heater 64 is once stopped. After that, when the temperature sensor 70 detects that the hot water temperature drops below the set temperature, the controller sends a command to detect this and energize the heater 64. Then, hot water below the set temperature is ejected from the nozzle 54.

As described above, since the temperature of the cleaning water ejected from the nozzle 54 is controlled by the temperature sensor 70 for energizing the heater 64, the temperature of the cleaning water is set from the nozzle 54 except when the cleaning water is initially supplied. Since hot water with a temperature above or below the temperature is constantly ejected, the user sets the hot water temperature of his or her preference,
The hot water that actually jets feels hot or cold, which has nothing to do with the set temperature, so there is a risk that the user may be confused and uncomfortable with the local cleaning. The above phenomenon is likely to occur when the supply amount of wash water is relatively small. To solve this, low temperature water is mixed with hot water heated by the heater 64 in the vicinity of the vent hole 63 when the supply amount of water is increased. Therefore, although it has been experimentally known that the problem of the temperature detected by the temperature sensor 70 can be solved, the amount of water supply changes depending on the preference of the user, so that changing the amount of water supply may be a clue to solving any problems. Therefore, it is difficult to reliably eject hot water having a temperature set by the user.

In view of the various problems described above, before the low-temperature water staying in the heating tank 61 is pushed out by the wash water passing therethrough and comes into contact with the temperature sensor 70, the low-temperature water is heated by the heater. Good mixing with heated wash water is required. If the instantaneous heating type heat exchange device of the sanitary washing device is improved so as to realize such mixing, the situation where the temperature sensor 70 prevents accurate detection of the hot water temperature by pushing out low-temperature water, It can be solved reliably. If such an improvement is realized by a simple structure, the instant heating type heat exchange device can be economically manufactured, which is preferable.

The hot water generated by heating the heater 64 is locally sprayed. Therefore, it is necessary to efficiently energize the heater 64 so that hot water having a temperature close to the set temperature can be obtained during use.

The present invention has the following constitution in order to solve the above problems and to provide a heat exchange device for efficiently energizing a heater.

[0011]

Means for Solving the Problem and Its Action / Effect The first heat exchange device of the present invention is provided in a sanitary washing device for ejecting hot water from a nozzle in accordance with a predetermined washing instruction, and the water is supplied by energizing the water. A heater for heating and a heating chamber provided with the heater and provided with an inlet and an outlet of the water are provided, and the water flowing from the inlet toward the outlet is heated by the heater, and the heating is performed. A heat exchange device for flowing hot water generated by the heater from the outlet toward the nozzle , the temperature being for detecting the temperature of hot water heated by the heater.
Comprising a <br/> and control means for controlling the degree sensor energization state of the heater, said control means, the energized state of the heater, so as to start a full energization when the predetermined cleaning instruction is given Control and then the temperature detected by the temperature sensor
The gist is that it is a means for controlling the hot water temperature to a set temperature based on the above .

It is also preferable that the control means is a means for controlling the energization state of the heater to a state in which the warm water retained in the heating chamber can be kept warm when a predetermined washing instruction is not issued.

The second heat exchanging device is an instantaneous heating type heat exchanging device, in which a heating tank having a built-in heater is set in a hot water storage housing made of a synthetic resin having excellent heat resistance and water resistance so as not to swing. In the hot water storage housing, a float switch is installed above the heating tank.
In addition, a substantially cylindrical water draining plug that communicates with the housing and the heating tank is vertically and integrally attached to the side of the hot water storage housing in a direction orthogonal to the hot water storage housing.
Further, at the upper end of the hot water storage housing, a temperature sensor for detecting the temperature of hot water having a temperature detecting portion protruding into the housing, a bimetal switch for preventing overheating, and the like are appropriately arranged. Further, in the hot water storage housing from which the temperature detecting portion of the temperature sensor projects, a through hole for communicating the heating tank and the hot water storage housing is bored in the wall surface located on the base end side of the heater, and the heating tank of this through hole is formed. In the lower part facing inside,
A baffle plate is horizontally projected so as to block about half of the cross-sectional area of the opening of the through hole, and the low temperature water staying on the bottom surface of the heating tank is directly connected to the temperature detecting portion of the temperature sensor by the baffle plate. It is characterized in that it is configured to prevent contact.

As described above, since the baffle plate that blocks approximately half of the cross-sectional area of the opening is formed in the through hole that connects the heating tank of the heat exchange device and the hot water storage housing, the low temperature water that stays in the heating tank is formed. When the washing water is pushed up by the passage of the washing water, it is pushed back toward the tip of the heating tank by the baffle plate, and is mixed with the washing water already heated by the heater before the passage hole to form the passage hole. Since it flows in and contacts the temperature sensor of the temperature sensor, it is possible to detect a temperature close to the temperature of the wash water heated by the heater, compared to the case where low temperature water directly contacts the temperature sensor of the temperature sensor. It is possible to reliably solve the problem that the appearance of water hinders accurate detection of the hot water temperature.

Further, the baffle plate formed in the hot water through hole is formed so as to cover about half of the cross-sectional area of the opening of the hot hole, but this is a low temperature staying in the heating tank. This is to prevent the water from being pushed up in the direction of the through hole almost vertically, and most of the cleaning water heated by the heater will flow along the axial direction of the heating tank. Even if the baffle plate is formed so as to cover the opening of the through hole about half, the wash water can flow smoothly and satisfactorily in the heat exchanger due to the different flow directions of the heated wash water. .

As described above, the low temperature water staying in the heating tank rises directly above the through hole into which the temperature detecting portion of the temperature sensor in the heat exchange device is inserted, so that Since the means for hindering the contact with the temperature detecting portion is formed, the temperature sensor can accurately detect the temperature without being affected by the low temperature water. Therefore, the user of the hot water can obtain the hot water having the temperature set by himself or herself regardless of the existence of the low temperature water.

Further, when the low temperature water staying in the heating tank is pushed up to the through hole side by the wash water flowing into the heat exchange device, the baffle plate provided under the through hole causes the heater to operate. Since it is guided to the heated hot water side and mixes well with the hot water, it is possible to eliminate the adverse effect on the temperature sensor, and the baffle plate provided below the through hole prevents the low temperature water from passing through the hole. Although the flow of water is blocked, the hot water heated by the heater can be smoothly flowed, so that the existence of the baffle does not impede the flow of the hot water at all, and the hot water heated by the wash water can be satisfactorily nozzled. It can be ejected from the device as water of appropriate temperature.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 shows a state in which a sanitary washing device having an instant heating type heat exchanger (hereinafter referred to as a heat exchanger) of the present invention is installed on a toilet body, and in the figure, an upper surface on the back side of the toilet body 1 is shown. The sanitary washing device 2 is mounted and fixed by using. The sanitary washing device 2 forms an internal space by the upper casing 3a and the base 3b having a planar shape shown in FIG. 3, and the base 3b is fixed to the toilet body 1 and installed. As shown in FIG. 2, the toilet seat 4 and the toilet lid 5 are attached to the upper casing 3a so as to be openable and closable. The functional part of the sanitary washing device 2 is operated by using a remote controller (not shown) hung on the wall, and the auxiliary operation of the side portion of the upper casing 3a is significantly smaller than the conventional one. Only the board 3c is provided.

Inside the sanitary washing device 2, as shown in FIG. 3, a nozzle device 6 is arranged substantially at the center of the base 3b.
A piping system for supplying heated cleaning water to the nozzle device 6 is provided. The nozzle device 6 is provided with a nozzle that reciprocates with respect to the storage position by a motor, and a conventionally used device may be incorporated as it is. The cleaning water supply system to the nozzle device 6 is provided with a valve unit 7 connected to an external cleaning water supply pipe and a heat exchanger 8 for heating the supplied cleaning water in this order. The valve unit 7 is
A solenoid valve-type on-off valve 7a that opens and closes the flow path by operating a remote controller, a flow rate adjustment valve 7b that adjusts the force of the water of the washing water ejected from the nozzle device 6, and the like are configured.

Next, FIG. 4 is a vertical sectional view showing a detailed structure of the heat exchanger 8. In the figure, a heat exchanger 8 has a water supply pipe 10 inserted into a hot water storage housing 9 made of synthetic resin having excellent heat resistance and water resistance, and an electric heating element integrally formed with the water supply pipe 10 is provided on the outer surface side. A heater 11 made of a hollow cylindrical ceramic to be embedded is surrounded by a sleeve 12 made of a metal material having good thermal conductivity such as copper, and is provided with a heating tank 13. The heating tank 13 has an inner flow path. Is inclined downward as it goes to the tip (to the right in FIG. 4), and is horizontally fixed to the hot water storage housing 9 in a watertight structure. An empty space above the heating tank 13 in the hot water storage housing 9 serves as a hot water storage unit 14, and a float switch 15 for preventing empty heating is incorporated in a part of the hot water storage unit 14 at an appropriate position so as not to hinder the flow of wash water. ing.

Subsequently, the base end of the heater 11 shown in FIG.
To the left), a through hole 16 is formed in the bulging portion a provided on the wall surface of the hot water storage housing 9 in the vertical direction from the upper end surface of the housing 9, and the heating tank 13 and the hot water storage housing 9 are passed through the through hole 16. To communicate with the hot water storage unit 14. In the lower opening b of the through hole 16 which faces the heating tank 13, the baffle plate 17 is provided on the wall surface of the hot water storage housing 9 so as to block about half the cross-sectional area of the opening b. As shown in FIG. 1, the heating tank 1 is integrated with the wall surface of the housing 9.
It is formed so as to project horizontally in the inside 3. Further, an opening c communicating with the hot water storage portion 14 is opened at an upper portion of the through hole 16 located in the hot water storage housing 9, and the through hole 16 having openings b and c in the upper and lower portions is provided. , A temperature detecting portion 18a of the temperature sensor 18 attached to the upper portion of the hot water storage housing 9
Is inserted into the heating tank 13 so as not to project from the lower opening b. 4 in FIG. 4 is a hot water storage housing 9
It is a bimetal switch installed in the center of the upper part to prevent overheating.

Further, in FIG. 4, on the opposite side to the connection side of the water supply pipe 10 and on the downstream end side of the flow path from the heater 11 through the sleeve 12 of the heating tank 13, a water drain plug (not shown) is built in. The tubular connection block 20 is inserted into the housing 9 in the vertical direction and integrally inserted, and a communication hole 21 is opened on the upper side of the connection block 20 in contact with the hot water storage portion 14. The heat exchanger 8 and the nozzle device 6 are communicated with each other via a vacuum breaker 22 and a hot water pipe 23 provided on the communication hole 21 and the connection block 20. A drain pipe 24 is connected to the lower portion of the connection block 20, and the opening / closing operation of the drain pipe 24 is performed by the connection block 2
The operation is performed by elevating and lowering the valve element constituting the water draining plug (not shown) inside 0 by the operation lever 25 from the outside.
In FIG. 4, reference numerals 26 and 27 denote communication holes that connect the heating tank 13 and the hot water storage unit 14 to the water drain plug, and 2 in FIG.
Reference numeral 8 denotes a warm air drying device, and 29 is a vacuum switch attached to the water supply pipe 10 side. When hot water is not jetted,
The inside of the heat exchanger 8 is constantly communicated with the atmosphere.

Next, the operation of the heat exchanger 8 will be described.
When the sanitary washing device 2 is not used, the wash water kept at an appropriate temperature in the heat exchanger 8 is stored in the hot water storage unit 14 and the heating tank 13. Further, since the pipe path connecting the hot water pipe 23 and the nozzle device 6 is communicated with the atmosphere by the vacuum breaker 22 provided on the connection block 20, no cleaning water remains. On the other hand, since the heat exchanger 8 and the hot water pipe 23 close the flow path connecting the heat exchanger 8 and the hot water pipe 23 with the vacuum breaker 22 while the wash water is not flowing, the heat exchanger 8 The interior does not communicate with the atmosphere.

In the above-mentioned state, when the washing water is ejected from the nozzle device 6 for local washing, the operation button marked "washing" of the remote controller is pressed to release the electromagnetic opening / closing valve 7a of the valve unit 7. Cleaning water (cold water) flows into the heat exchanger 8 from a water supply source (not shown) through the water supply pipe 10. At the same time that the washing water flows into the heat exchanger 8, the heater 11 starts full energization. While the cleaning water flows from the inside of the heater 11 between the outer surface of the heater 11 and the sleeve 12, the cleaning water is heated by the heater 11 and flows into the hot water storage unit 14. On the other hand, the wash water (hot water) kept warm in the heat exchanger 8 is sequentially pushed out from the hot water storage housing 9 by the wash water flowing from the water supply pipe 10, opens the valve body of the vacuum breaker 22 and passes through the hot water pipe 23. It is ejected from the nozzle device 6.

As described above, when the cleaning water flows into the heat exchanger 8 through the water supply pipe 10 in the local cleaning, the cleaning water is heated by the heater 11 to become hot water, and the hot water storage unit 1 is sequentially installed.
It is jetted from the nozzle device 6 through 4 → communication hole 21 → hot water pipe 23. The temperature of the hot water ejected from the nozzle device 6 is the temperature sensor 1 in which the temperature detecting portion 18a is inserted into the through hole 16 which connects the heating tank 13 and the hot water storage portion 14 to each other.
If the detected temperature is higher or lower than the preset temperature, the heater 11 is energized (ON / OFF) controlled by a command from the controller to maintain the preset temperature. Let

However, when the wash water (cold water) is heated to the proper temperature water by the heat exchanger 8 and is fed to the nozzle device 6,
The heating tank 13 is heated by the wash water flowing from the water supply pipe 10.
When the low-temperature water that has stayed in the inside of the heater 11 without being affected by the heating action of the heater 11 is pushed out toward the through-hole 16 side, the low-temperature water rises immediately above the through-hole 16. However, since the lower opening b of the through hole 16 is blocked by the horizontally extending baffle plate 17 in the heating tank 13, the low temperature water is blocked by the baffle plate 1.
7 in the horizontal direction (on the leading end side of the heating tank 13), and the heater 1 is provided on the front side of the lower opening b of the through hole 16.
The hot water which is heated by 1 and flows to the side of the through hole 16 is brought into contact with and mixed with. Then, the mixed cleaning water is extruded as it is from the lower opening b of the through hole 16 through the upper opening c to the hot water storage unit 14. At this time, since the low-temperature water is mostly mixed with the wash water heated by the heater 11, the temperature of the mixed warm water is measured by the temperature detecting unit 18 a of the temperature sensor 18 when passing through the passage hole 16. Although the detection is performed, the detection temperature is not the low temperature water but the mixed hot water, so that the detection temperature can detect a temperature close to the set temperature.

As described above, the temperature sensor 18 can always detect the temperature of the hot water heated by the heater 11 by the inflow of the washing water, and even if the low temperature water staying in the heating tank 13 is Even if it suddenly appears in the vicinity of the temperature sensor 18, this low temperature water is directly passed through the baffle plate 1 through the through hole 1.
Since it is prevented from flowing into 6 and is mixed well with the hot water heated by the heater 11 and flows through the through hole 16, it becomes possible to always accurately detect the temperature of the hot water by the temperature sensor 18. The local cleaning can be comfortably performed by ejecting hot water of a temperature set by the user.

Next, the heat exchanger 8 equipped with the baffle plate 17
Then, when the temperature of the hot water ejected from the nozzle device 6 was experimentally measured using a heat exchanger having no baffle plate 17,
In the heat exchanger 8 of the present invention having the baffle plate 17 irrespective of the supply amount of wash water, hot water maintaining the set temperature (about 38 ° C.) is constantly ejected. However, in the heat exchanger having no baffle plate 17, when the amount of wash water supplied is large, that is,
If the jetting amount of hot water is maximized by the pressure regulating valve, hot water at a temperature close to the set temperature can be jetted, but as the jetting amount decreases, the set temperature becomes the center and
Warm water having a difference corresponding to the lower temperature difference was ejected, and even if the ejection temperature was set in advance, it was difficult to eject the warm water at the set temperature.

This is because even if the heater energization control is performed every time the temperature sensor detects the temperature of low-temperature water or high-temperature water, which has a problem in its use during local cleaning, the heating action of the cleaning water by the heater is It is thought that this is nothing else because it cannot be performed following the temperature detection by. on the other hand,
The present invention is provided with the baffle plate 17 for restricting the flow of the low temperature water, the low temperature water blocks contact with the temperature sensor 18 by the baffle plate 17, and the low temperature water is mixed with the hot water heated by the heater 11 before this. By disappearing, the temperature sensor 18
This is nothing but the problem that prevents the accurate detection of the hot water temperature.

Another embodiment is shown in FIG. In FIG. 6, a rectifying plate 171 is arranged on the outer circumference of a heater 164 loosely fitted in a heating tank 161 over its entire length in a spirally bent state with an appropriate interval, and flows into the heater 164. Cleaning water is made to spirally flow between the heater 164 and the inner peripheral surface of the heating tank 161, and the contact time with the heater 164 is lengthened,
In addition, the cross-sectional structure of the heat exchanger 157a configured to increase the heat exchange rate and reduce the partial temperature difference of the wash water by generating convection in the wash water that accumulates in the heating tank 161 is shown. The temperature of the hot water that has passed through the through hole 163 is detected by the temperature sensor 70.

In the structure of the heat exchanger 157a,
Since the cleaning water can be made to flow in the heating tank 161 while being swirled by the flow rectifying plate 171, the amount of the cleaning water staying in the heating tank 161 is reduced, so that the temperature of the hot water passing through the vent hole 163 is reduced. Heater 16
The temperature of the hot water heated by 4 can be detected almost certainly.

[Brief description of drawings]

FIG. 1 is a perspective view of a sanitary washing device equipped with the instant heating type heat exchange device of the present invention.

FIG. 2 is likewise a perspective view of the sanitary washing device showing a state when the toilet lid is opened.

FIG. 3 is a plan view showing the internal structure of a sanitary washing device equipped with the heat exchange device of the present invention.

FIG. 4 is a vertical cross-sectional view showing a heat exchange device of the present invention.

FIG. 5 is an enlarged cross-sectional view showing a main part of the heat exchanger of the present invention.

FIG. 6 is a longitudinal sectional view showing another embodiment of the heat exchanger.

FIG. 7 is a schematic view showing a usage state of a conventional sanitary washing device using a heat exchanger.

FIG. 8 is a sectional view showing a conventional heat exchanger in a longitudinal section.

[Explanation of symbols]

1 ... Toilet body 2 ... Sanitary washing device 3a ... upper casing 3b ... Base 4 ... Toilet seat 6 ... Nozzle device 7 ... Valve unit 8 ... Heat exchanger 9 ... Hot water storage housing 10 ... Water pipe 11 ... Heater 13 ... Heating tank 14 ... Hot water storage 16 ... through hole 17 ... Baffle board 18 ... Temperature sensor 18a ... Thermometer 157a ... Heat exchanger 161 ... Heating tank 163 ... through hole 164 ... Heater 170 ... Temperature sensor 171 ... Rectifier plate

─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Masaaki Niimi 1 Aichi-cho, Kasugai-shi, Aichi Aichi Electric Co., Ltd. (72) Inventor Shuichi Hirano 1 Aichi-cho, Kasugai-shi, Aichi Aichi Electric Co., Ltd. (72 ) Inventor Masaki Ohashi 1 Aichi-cho, Kasugai-shi, Aichi Aichi Electric Co., Ltd. (56) Reference JP-A-6-257201 (JP, A) JP-A-61-40934 (JP, A) Actual development Sho-62- 114972 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) F24H 1/18 301 E03D 9/08

Claims (2)

(57) [Claims] 1. A heater provided in a sanitary washing device for jetting hot water from a nozzle in response to a predetermined washing instruction, a heater for heating the water by energization, and a heater provided with the water inlet and outlet. And a heating chamber provided with the heating chamber, the water flowing from the inlet toward the outlet is heated by the heater, and the hot water generated by the heating flows out from the outlet toward the nozzle. Temperature sensor that detects the temperature of the hot water heated by the heater.
And control means for controlling an energization state of the heater and the capacitors, said control means, the energized state of the heater, and controls to start full power when the predetermined cleaning instruction is given, then, Based on the temperature detected by the temperature sensor
A heat exchange device that is a means for controlling the hot water temperature to a set temperature . 2. The control means is means for controlling the energization state of the heater to a state in which warm water retained in the heating chamber can be kept warm when the predetermined cleaning instruction is not issued. The heat exchange device described.