JP2001241755A - Heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating device capable of detecting the faulty mounting of two sets of cutoff valves equipped for supplying/stopping high-temperature water and water into a bathtub respectively, and preventing a trouble wherein high-temperature hot-water re-filling operation is effected instead of water re-filling operation by mistake. SOLUTION: When a temperature difference between the detecting temperature Tc of a feed water temperature sensor and the detecting temperature Tf of a hot-water filling temperature sensor is less than 5 K (step S6) in spite that a high-temperature hot-water re-filling switch is put ON (step S1), and a first solenoid valve equipped in a high-temperature hot-water supplying tube is opened (step S2), it is decided that the error of faulty connection of the solenoid valves is caused (step S11) and the high-temperature hot-water re-filling operation and the water re-filling operation are prohibited (step S12), whereby the trouble wherein the high-temperature hot-water re-filling operation is effected instead of the water re-filling operation by mistake can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating device having a function of heating water and supplying it to a bathtub.

[0002]

2. Description of the Related Art Conventionally, a heating section for heating water, a hot water supply pipe connected to a bathtub, a high-temperature hot water supply pipe for supplying high-temperature water supplied from the heating section to the hot water supply pipe, and a heating section Pipe that supplies water to the hot water supply pipe by bypassing the hot water supply pipe, a first shut-off valve that is provided in the hot water supply pipe to supply / stop high-temperature water, and water that is provided in the bypass pipe and flows from the bypass pipe. There is a heating device provided with a second shut-off valve for supplying / stopping. In this apparatus, high-temperature hot water can be supplied to the bathtub by opening only the first shutoff valve (high-temperature hot water), and by opening only the second shutoff valve, the bathtub can be opened. Water (supply water) can be supplied.

[0003]

However, in the above-described conventional heating device, the first shutoff valve and the second shutoff valve are interchanged or the power cords of the first and second shutoff valves to the control unit are not provided. If the connections are not properly performed, there is a problem in that water is supplied to the bathtub even though high-temperature hot water is specified, or conversely, high-temperature water is supplied to the bathtub even when high-temperature water is specified.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to interchange two mounting valves provided for supplying / stopping hot water and water to / from a bathtub, respectively. Another object of the present invention is to provide a heating device capable of detecting a mistake in connection of a power cord of each shutoff valve to a control unit and preventing a problem in which a hot water operation and a water operation are interchanged, beforehand. .

[0005]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a heating unit for heating water, a hot water supply pipe connected to a bathtub, and a heater for supplying water from the heating unit. A hot water supply pipe for supplying high-temperature water to the hot water supply pipe, a bypass pipe for bypassing the heating unit and supplying water to the hot water supply pipe, and a supply of the high-temperature water provided in the high-temperature hot water supply pipe. A first shut-off valve for performing / stopping, a second shut-off valve provided in the bypass pipe for supplying / stopping water from the bypass pipe, and a bathtub provided for the hot water supply pipe. A hot water temperature sensor for detecting a hot water supply temperature of the hot water supply pipe, a high temperature water temperature sensor for detecting the temperature of the high temperature water provided in the high temperature water supply pipe, and a temperature sensor for detecting the temperature of water provided in the bypass pipe. The feedwater temperature sensor and the front A heating unit including a control unit that controls opening and closing of the first and second shut-off valves, wherein the shut-off valve erroneous connection detection unit that detects an erroneous connection between the first shut-off valve and the second shut-off valve includes the Prepared in the control unit. Therefore, the disconnection valve erroneous connection detection means can detect the presence or absence of the erroneous connection between the first shutoff valve and the second shutoff valve. Can be prevented.

According to a second aspect of the present invention, in the heating device according to the first aspect, the shut-off valve erroneous connection detecting means is configured to determine whether the first and second shut-off valves are open / closed and the hot-water temperature sensor detection information. On the basis of this, an erroneous connection is detected. Therefore, based on the opening / closing information of the shutoff valve and the detection information of the hot water temperature sensor corresponding thereto, it is possible to detect the presence / absence of an erroneous connection between the first shutoff valve and the second shutoff valve. It is possible to prevent a problem in which the water operation is switched by mistake.

According to a third aspect of the present invention, in the heating device according to the first or second aspect, the disconnection valve erroneous connection detecting means includes: the supply water temperature sensor and the hot water after the first shutoff valve is opened. If the temperature difference between the detected temperatures of the beam temperature sensor is equal to or less than a predetermined value for a predetermined time, it is determined that the connection is incorrect. If the detected temperature of the hot water temperature sensor is close to the water temperature instead of the high-temperature water temperature when the first shut-off valve is opened for the high-temperature hot water operation, it is suspected that the connection is incorrect. In this manner, the presence or absence of an erroneous connection can be detected based on the opening / closing information of the shut-off valve and the detection information of the hot water temperature sensor.

According to a fourth aspect of the present invention, in the heating device according to the first or second aspect, the shutoff valve erroneous connection detecting means includes a switch for connecting the hot water temperature sensor and the hot water temperature sensor after the first shutoff valve is opened. If the temperature difference between the detected temperatures of the hot water temperature sensor is equal to or more than a predetermined value for a predetermined time, it is determined that the connection is incorrect. If the temperature detected by the hot water temperature sensor is not close to the high-temperature water temperature when the first shut-off valve is opened for the high-temperature hot water operation, it is suspected that the connection has been made incorrectly. In this manner, the presence or absence of an erroneous connection can be detected based on the opening / closing information of the shut-off valve and the detection information of the hot water temperature sensor.

According to a fifth aspect of the present invention, in the heating device according to any one of the first to fourth aspects, the disconnection valve erroneous connection detecting means includes the first high temperature water temperature sensor and the second high temperature water sensor after the second shutoff valve is opened. If the temperature difference between the respective detected temperatures of the hot water temperature sensor is equal to or less than a predetermined value for a predetermined time, it is determined that the connection is incorrect. If the temperature detected by the hot water temperature sensor is not the water temperature but close to the high-temperature water temperature when the second shut-off valve is opened for the water operation, it is suspected that the connection has been made incorrectly. In this manner, the presence or absence of an erroneous connection can be detected based on the open / close information of the shut-off valve and the detection information of the hot water temperature sensor.

According to a sixth aspect of the present invention, in the heating device according to any one of the first to fourth aspects, the shutoff valve erroneous connection detecting means includes the water supply temperature sensor and the hot water after the second shutoff valve is opened. If the temperature difference between the respective detected temperatures of the beam temperature sensor is equal to or more than a predetermined value for a predetermined time, it is determined that the connection is incorrect. If the temperature detected by the hot water temperature sensor is not close to the water temperature when the second shut-off valve is opened for the water running operation, it is suspected that the connection has been made incorrectly. In this manner, the presence or absence of an erroneous connection can be detected based on the open / close information of the shut-off valve and the detection information of the hot water temperature sensor.

According to a seventh aspect of the present invention, in the heating device according to any one of the first to sixth aspects, when the shutoff valve erroneous connection detecting means detects an erroneous connection, the first and second shutoff valves are opened. The control unit controls the valve to be prohibited. Therefore, when an erroneous connection of the shut-off valves is detected, the opening of both shut-off valves is prohibited to prohibit the high-temperature hot-water operation and the intermittent-water operation. Can be prevented beforehand.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a configuration diagram in which a heating device 100 according to one embodiment of the present invention is applied to an electric water heater.

The water from the water supply source is depressurized by the pressure reducing valve 1, and is branched into a water supply pipe 2 and a bypass pipe 3 downstream of the pressure reducing valve 1. The bypass pipe 3 is connected to a downstream hot water / hot water mixing valve 46A, and includes a water supply temperature sensor 41 for detecting a water supply temperature, and a vacuum breaker 51 for canceling a negative pressure when a negative pressure is generated in the piping such as when water is cut off. Have. The water supply pipe 2 communicates with a heating unit 31. The heating unit 31 includes a hot water storage tank 32, a lower heater 33, and an upper heater 34. The water in the hot water storage tank 32 is supplied to the lower heater 3
3. The tank lower temperature sensor 3 by the upper heater 34
7. Heating is performed so that the temperature detected by the tank upper temperature sensor 38 becomes high (for example, 85 ° C.). Further, a drain valve 36 is provided below the hot water storage tank 32. Further, a safety valve 35 for releasing expansion water generated when the water in the hot water storage tank 32 is heated and a high-temperature hot water supply pipe 4 for discharging high-temperature water from the hot water storage tank 32 are provided at an upper portion of the hot water storage tank 32.

In the hot / cold water mixing valve 46A driven by the stepping motor, water from the bypass pipe 3 and high-temperature water from the high-temperature hot water pipe 4 are mixed, and hot water of the appropriate temperature is supplied to the hot-water pipe 8A.
Supplied to The hot water supply pipe 8A is provided with a hot water supply temperature sensor 43A for detecting a hot water supply temperature and a hot water supply flow rate sensor 44 for detecting a flow rate of hot water supplied to the hot water supply pipe 8A. Further, the high-temperature hot water supply pipe 4 is provided with a high-temperature water temperature sensor 42 for detecting the temperature of the high-temperature hot water supplied from the heating unit 31.

The high-temperature hot water supply pipe 4 is further downstream of the high-temperature hot water supply pipe 5.
And a first solenoid valve 2 for starting / stopping the supply of high-temperature water
2 (in this embodiment, the shutoff valve is described as an electromagnetic valve), and the hot water / hot water mixing valve 46B is connected. On the other hand, the bypass pipe 3 branches downstream of the vacuum breaker 51, and communicates with the hot water mixing valve 46B via the bypass pipe 7 and the second electromagnetic valve 23 for starting / stopping the supply of water.

In the hot water mixing valve 46B driven by the stepping motor, the water from the bypass pipe 7 and the high temperature water from the high temperature hot water supply pipe 5 are mixed, and one of the high temperature water, water and hot water is heated. It is supplied to the hot water supply pipe 9. The hot water supply pipe 9 has a hot water temperature sensor 43B for detecting the hot water temperature, a hot water flow sensor 45 for detecting the flow rate of hot water supplied to the hot water supply pipe 9, and a check valve 5.
2,53. Hot water supply pipe 9 and bathtub 6
2 through an adapter 61 attached to the wall.

Further, the heating device 100 includes a tank lower temperature sensor 37, a tank upper temperature sensor 38, a feed water temperature sensor 41, a hot water temperature sensor 42, a hot water temperature sensor 43A, a hot water flow sensor 44, a hot water temperature sensor 43B, and a hot water temperature sensor 43B. Based on a detection signal from the beam flow sensor 45 and the like and an instruction from the remote controller 71, the lower heater 3
3, a main body control unit 70 for controlling the upper heater 34, the hot and cold water mixing valve 46A, the hot and cold water mixing valve 46B, the first solenoid valve 22, the second solenoid valve 23, and the like.

The remote controller 71 has a hot water supply temperature setting switch 85 for setting a set temperature Ts of hot water supplied from the hot water supply pipe 8A, a hot water temperature setting switch 86 for setting a set temperature Tfs of hot water to be poured into the bathtub 62, A hot water amount setting switch 87 for setting the amount of hot water to be supplied to the bathtub 62, a hot water switch 82 that is turned on when the hot water is supplied to the bathtub 62, and a high temperature switch that is turned on when supplying high-temperature water into the bathtub 62. A hot water switch 83, a water switch 84 that is turned on when supplying water into the bathtub 62, a display unit 81 that displays characters such as hot water set temperature Ts, hot water set temperature Tfs, and operating information of the heating device, and heating by voice. A speaker 88 for notifying the operation information of the device is provided. Further, the remote controller 71 and the main body control unit 70 are connected by a communication line 72 and mutually communicate operation instruction information and operation information.

FIG. 2 is an operation flow showing a first embodiment in which the solenoid valve erroneous connection detecting means in one embodiment of the present invention is applied to the electric water heater shown in FIG. In the present embodiment, misconnection between the first solenoid valve 22 and the second solenoid valve 23 is determined at the time of high-temperature hot water operation. First, it is confirmed whether the high-temperature hot water switch 83 of the remote controller 71 has been turned ON (step S1). High temperature hot water switch 83 is O
If the N operation has been performed, the first solenoid valve 22 is opened to supply the hot water in the hot water storage tank 32 to the bathtub 62 (step S2). Next, it is confirmed whether or not the flow rate Qf detected by the hot water flow rate sensor 45 exceeds 0 liter / min (step S3). When the flow rate Qf is 0 liter / min, 5
It is determined whether or not minutes have elapsed (step S4). After 5 minutes, it is determined that there has been a water outage, the first solenoid valve is closed (step S8), and the high temperature hot water switch 83 is turned off.
FF is performed (step S9), and the high-temperature settling water operation ends.

If the flow rate Qf exceeds 0 liter / min in step S3, it is checked whether the temperature of the hot water in the hot water storage tank 32 has dropped, that is, whether the hot water has run out. That is, it is confirmed whether or not the detected temperature Tt of the tank upper temperature sensor 38 is equal to or higher than the hot water set temperature Tfs (step S5). Tank upper temperature sensor 3
If the detected temperature Tt of Step 8 is lower than the hot water set temperature Tfs, that is, if the hot water has run out, the process proceeds to Step S8,
Terminate the hot water running operation.

In step S5, the tank upper temperature sensor 3
8 is higher than the hot water set temperature Tfs, that is, when the hot water is not running out, the detected temperature Tc of the water supply temperature sensor 41 and the hot water temperature sensor 43B
It is confirmed whether the temperature difference of the detected temperature Tf is 5K or less (step S6). If the temperature difference is 5K or less, it is checked whether the state has continued for one minute continuously (step S10). If the temperature difference has continued for one minute, the solenoid valve misconnection error, that is, the first solenoid valve 22 And the second solenoid valve 23 are erroneously connected (step S11), and the high-temperature running water operation and the running water operation are prohibited. That is, the opening of the first solenoid valve 22 and the second solenoid valve 23 is prohibited (step S12). Then, the fact that an error has occurred is notified by the remote controller 71 (step S13). As described above, when it is determined that the connection is incorrect, the opening of the solenoid valve is prohibited to prohibit the high-temperature hot water operation and the intermittent water operation, thereby preventing a problem that the high-temperature hot water operation and the intermittent water operation are interchanged. be able to.

If the temperature difference exceeds 5K in step S6, the high-temperature hot water operation is continued, and when the amount of hot water exceeds 30 liters (step S7), the first solenoid valve 22 is closed. Then (step S8), the high-temperature settling water operation is terminated.

At steps S6, S10 and S11, the detected temperature Tc of the feed water temperature sensor 41 and the hot water temperature sensor 4
The reason why the erroneous connection between the first solenoid valve 22 and the second solenoid valve 23 can be determined based on the temperature difference of the detected temperature Tf of 3B is as follows.

When the first solenoid valve 22 is opened, usually,
Hot water in the hot water storage tank 32 is supplied to the bathtub 62.
At this time, the detected temperature Tf of the hot water temperature sensor 43B and the detected temperature Th of the high-temperature water temperature sensor 42 provided in the high-temperature hot water supply pipe 4 substantially match. However, the first solenoid valve 2
When the second solenoid valve 23 is misplaced with the second solenoid valve 23, when the first solenoid valve 22 is opened, water from the water supply source is supplied to the bathtub 62 via the bypass pipe 7. At this time, the detected temperature Tc of the water supply temperature sensor 41 and the hot water temperature sensor 43
The detected temperatures Tf of B substantially match. Then, the detected temperature Th of the hot water temperature sensor 42 and the detected temperature Tf of the hot water temperature sensor 43B, which should be almost the same in the normal case,
A temperature difference occurs. As described above, the erroneous connection can be determined from the opening / closing information of the solenoid valve and the detection information of the temperature sensor.

FIG. 3 is an operation flow showing a second embodiment in which the solenoid valve erroneous connection detecting means in one embodiment of the present invention is applied to the electric water heater shown in FIG. The difference from FIG. 2 is that only step S6 is replaced with step S16, and the rest is the same. That is, FIG. 2 shows step S6,
By detecting that the detection temperature Tc of the feed water temperature sensor 41 and the detection temperature Tf of the hot water temperature sensor 43B are substantially the same, the erroneous connection is determined. In FIG. The erroneous connection is determined by detecting that a temperature difference occurs in the detection temperature Tf of the hot water temperature sensor 43B.

More specifically, in step S16, the detected temperature Th of the high-temperature water temperature sensor 42 and the hot water temperature sensor 43
If the temperature difference of the detected temperature Tf of B exceeds 5K,
It is checked whether or not the state continues for one minute (step S10). If the state continues for one minute, a solenoid valve misconnection error, that is, a misconnection between the first solenoid valve 22 and the second solenoid valve 23, is detected. (Step S11), and the high-temperature running water operation and the running water operation are prohibited. That is, the first solenoid valve 22
And the opening of the second solenoid valve 23 is prohibited (step S1).
2). Then, the fact that an error has occurred is notified by the remote controller 71 (step S13).

If the temperature difference is equal to or less than 5K in step S16, the high-temperature hot water operation is continued, and when the amount of hot water exceeds 30 liters (step S7), the first solenoid valve 22 is closed (step S7). In step S8), the high-temperature settling water operation is terminated.

FIG. 4 is an operation flow showing a third embodiment in which the solenoid valve erroneous connection detecting means in one embodiment of the present invention is applied to the electric water heater shown in FIG. In the present embodiment, an erroneous connection between the first solenoid valve 22 and the second solenoid valve 23 is determined at the time of the cutting water operation. First, it is confirmed whether or not the insert switch 84 of the remote controller 71 has been turned ON (step S21). When the water switch 84 is turned on, the water from the water supply source through the bypass pipe 7 is supplied to the bathtub 6.
The second solenoid-operated valve 22 is opened in order to supply the second solenoid valve 2 (step S22). Next, it is confirmed whether or not the flow rate Qf detected by the hot water flow rate sensor 45 exceeds 0 liter / min (step S3). When the flow rate Qf is 0 liter / min, 5
It is determined whether or not minutes have elapsed (step S4). If five minutes have elapsed, it is determined that water has been cut off, the second solenoid valve is closed (step S28), and the water switch 84 is turned off.
F (Step S29), and the water running operation ends.

If the flow rate Qf exceeds 0 liter / min in step S3, the detected temperature T
It is checked whether the temperature difference between h and the temperature Tf detected by the hot water temperature sensor 43B is 5K or less (step S26). If the temperature difference is 5K or less, it is checked whether the state has continued for one minute continuously (step S10). If the temperature difference has continued for one minute, the solenoid valve misconnection error, that is, the first solenoid valve 22 And the second solenoid valve 23 are erroneously connected (step S11), and the high-temperature running water operation and the running water operation are prohibited. That is, the opening of the first solenoid valve 22 and the second solenoid valve 23 is prohibited (step S12). Then, the fact that an error has occurred is notified by the remote controller 71 (step S13). As described above, when it is determined that the connection is incorrect, the opening of the solenoid valve is prohibited to prohibit the high-temperature hot water operation and the intermittent water operation, thereby preventing a problem that the high-temperature hot water operation and the intermittent water operation are interchanged. be able to.

If the temperature difference exceeds 5K in step S26, the running of the running water is continued, and when the amount of hot water exceeds 10 liters (step S27), the second solenoid valve 22 is closed (step S27). S28), terminates the water operation.

In steps S26, S10 and S11, the first solenoid valve 22 is determined based on the temperature difference between the detected temperature Th of the hot water temperature sensor 42 and the detected temperature Tf of the hot water temperature sensor 43B.
The reason why the erroneous connection between the and the second solenoid valve 23 can be determined is as follows.

When the second solenoid valve 22 is opened, usually,
Water from a water supply source is supplied to the bathtub 62 via the bypass pipe 7. At this time, the detected temperature Tf of the hot water temperature sensor 43B and the detected temperature Tc of the water supply temperature sensor 41 substantially match. However, when the first solenoid valve 22 and the second solenoid valve 23 are interchanged, when the second solenoid valve 22 is opened, the high-temperature hot water in the hot water storage tank 32 passes through the high-temperature hot water supply pipe 5 and the bathtub 6.
2 will be supplied. At this time, the detection temperature Th of the high-temperature water temperature sensor 42 and the detection temperature Tf of the hot water temperature sensor 43B substantially match. Then, a temperature difference occurs between the detected temperature Tc of the feed water temperature sensor 41 and the detected temperature Tf of the hot water temperature sensor 43B, which should be almost equal to each other. As described above, the erroneous connection can be determined from the opening / closing information of the solenoid valve and the detection information of the temperature sensor.

FIG. 5 is an operation flow showing a fourth embodiment in which the solenoid valve erroneous connection detecting means in one embodiment of the present invention is applied to the electric water heater shown in FIG. The only difference from FIG. 3 is that step S26 is replaced by step S36.
Other than that is the same. That is, FIG.
Then, by detecting that the detection temperature Th of the high-temperature water temperature sensor 42 and the detection temperature Tf of the hot water temperature sensor 43B substantially match, the erroneous connection is determined.
The erroneous connection is determined by detecting that a temperature difference occurs between the detected temperature Tc of the feed water temperature sensor 41 and the detected temperature Tf of the hot water temperature sensor 43B.

Specifically, in step S36, the detected temperature Tc of the feed water temperature sensor 41 and the hot water temperature sensor 43B
If the temperature difference of the detected temperature Tf exceeds 5K, it is checked whether or not the state has continued for one minute (step S10). That is, the first solenoid valve 22 and the second solenoid valve 23
Is determined to be incorrect connection (step S11), and the high-temperature running water operation and the running water operation are prohibited. That is, the opening of the first solenoid valve 22 and the second solenoid valve 23 is prohibited (step S12).
Then, the fact that an error has occurred is notified by the remote controller 71 (step S13).

If the temperature difference is less than 5K in step S36, the running of the insert water is continued, and when the amount of hot water exceeds 10 liters (step S27), the second solenoid valve 23 is closed (step S28). Then, the water operation is terminated.

[Brief description of the drawings]

FIG. 1 shows a heating device 100 according to an embodiment of the present invention.
Diagram of the application of the water heater to an electric water heater

FIG. 2 is an operation flow showing a first embodiment in which the solenoid valve erroneous connection detection means in one embodiment of the present invention is applied to the electric water heater shown in FIG.

FIG. 3 is an operation flow showing a second embodiment in which the solenoid valve erroneous connection detection means according to one embodiment of the present invention is applied to the electric water heater shown in FIG. 1;

FIG. 4 is an operation flow showing a third embodiment in which the solenoid valve erroneous connection detection means in one embodiment of the present invention is applied to the electric water heater shown in FIG.

FIG. 5 is an operation flowchart showing a fourth embodiment in which the solenoid valve erroneous connection detecting means according to one embodiment of the present invention is applied to the electric water heater shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Pressure reducing valve 2 ... Water supply pipe 3 ... Bypass pipe 4 ... Hot water supply pipe 5 ... Hot water supply pipe 7 ... Bypass pipe 8A ... Hot water supply pipe 9 ... Hot water supply water pipe 22 ... First solenoid valve 23 ... Second solenoid valve 31 ... Heating section 32 Hot water storage tank 33 Lower heater 34 Upper heater 35 Safety valve 36 Drain valve 37 Tank lower temperature sensor 38 Tank upper temperature sensor 41 Water supply temperature sensor 42 Hot water temperature sensor 43A Hot water temperature sensor 43B ... hot water temperature sensor 44 hot water supply flow sensor 45 hot water flow sensor 46A hot water mixing valve 46B hot water mixing valve 51 vacuum breaker 52 check valve 53 check valve 61 adapter 62 bathtub 70 ... Main body control unit 71 ... Remote control 72 ... Communication line 81 ... Display unit 82 ... Boiler switch 83 ... Hot water bath Chi 84 ... Sashimizu switch 85 ... hot water supply temperature setting switch 86 ... hot water beam temperature setting switch 87 ... hot water beam amount setting switch 88 ... speaker 100 ... heating device

Claims (7)

[Claims] 1. A heating section for heating water, a hot water supply pipe connected to a bathtub, a high-temperature hot water supply pipe for supplying high-temperature water supplied from the heating section to the hot water supply pipe, and the heating section. A hot water supply pipe, a first shut-off valve provided on the high-temperature hot water supply pipe for supplying / stopping the high-temperature water, and a bypass pipe provided on the bypass pipe. A second shutoff valve for supplying / stopping water from the pipe, a hot water temperature sensor provided on the hot water supply pipe for detecting a hot water supply temperature to a bathtub, and a high temperature hot water supply pipe. A high-temperature water temperature sensor for detecting the temperature of the high-temperature water, a feedwater temperature sensor provided in the bypass pipe for detecting the temperature of water, and control for controlling opening and closing of the first and second shut-off valves. In a heating device comprising a Heating apparatus, characterized in that the shut-off valve misconnection detecting means for detecting the misconnection of the first shut-off valve and said second shut-off valve provided in the control unit. 2. The shut-off valve erroneous connection detecting means includes:
The heating device according to claim 1, wherein an erroneous connection is detected based on opening / closing information of a second shutoff valve and detection information of the hot water temperature sensor. 3. The shut-off valve erroneous connection detecting means includes a state in which, after the first shut-off valve is opened, a temperature difference between each of the detected temperatures of the feed water temperature sensor and the hot water temperature sensor is equal to or less than a predetermined value. The heating device according to claim 1, wherein when a predetermined time has elapsed, the connection is determined to be incorrect. 4. The shut-off valve erroneous connection detecting means, wherein after the first shut-off valve is opened, a temperature difference between each of the detected temperatures of the high-temperature water temperature sensor and the hot water temperature sensor is equal to or more than a predetermined value. The heating device according to claim 1, wherein the connection is determined to be incorrect when the state continues for a predetermined time. 5. The shut-off valve erroneous connection detecting means, wherein, after the second shut-off valve is opened, a temperature difference between each of the detected temperatures of the high-temperature water temperature sensor and the hot water temperature sensor is equal to or less than a predetermined value. The heating device according to claim 1, wherein when the state continues for a predetermined time, the connection is determined to be incorrect. 6. The shutoff valve erroneous connection detecting means is configured to determine that a temperature difference between each of the detected temperatures of the feed water temperature sensor and the hot water temperature sensor is equal to or greater than a predetermined value after the second shutoff valve is opened. The heating device according to claim 1, wherein the connection is determined to be erroneous when a predetermined time has elapsed. 7. The control unit controls the first and second shut-off valves to prohibit opening when the shut-off valve erroneous connection detecting means detects an erroneous connection. The heating device according to claim 1.