JP2015039604A - Bathtub washing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To securely protect a user from the ejection of hot water in a high temperature state during execution of a bathtub washing operation after occurrence of disconnection of a water heater remote controller.SOLUTION: A bathtub washing system includes: a washing unit 10; a washing operation part 8 which generates a washing operation command for permitting a washing operation of the washing unit 10; and a control unit 100 which generates a hot water supply operation command for permitting a hot water supply device 3 a hot water supply operation by receiving the washing operation command from the washing operation part 8. The hot water supply device 3 is communicatively connected to hot water supply operation parts 7, 9, and notifies of high temperature tapping in advance by using the hot water supply operation parts 7, 9 when the hot water supply setting temperature of the hot water supply operation parts 7, 9 at the time of reception of the hot water supply operation command exceeds the permissible temperature. The control unit 100 prohibits supply of hot water at the temperature exceeding the permissible temperature from the hot water supply device 3 on the basis of the washing operation command when the disconnection of the hot water supply operation parts 7, 9 is diagnosed on the basis of the communication state between the hot water supply device 3 and the hot water supply operation parts 7, 9.

Description

  The present invention relates to a bathtub cleaning system that automatically cleans a bathtub using hot water supplied from a hot water supply apparatus.

  As a bathtub cleaning system, a cleaning pipe connected to a cleaning nozzle provided in the bathtub is connected to a hot water heater (heat source unit), and hot water supplied from this water heater is used to inject cleaning liquid and hot water from the cleaning nozzle. What performs bathtub washing operation is known.

  As such a bath cleaning system, Japanese Patent No. 3541622 (Patent Document 1) has a configuration in which a cleaning unit and a remote control device are connected via a remote control cord to a control main body of a hot water bath-equipped bath. Is disclosed. In this patent document 1, the control main body controls the overall operation based on data input from a remote control device via a remote control code and detection signals from various sensors provided in a hot water bath with a hot water heater. . In addition, the control body unit periodically communicates with the cleaning unit via the remote control code, and controls the bath cleaning operation while checking the state of the load (detergent opening / closing valve, cleaning opening / closing valve, etc.) of the cleaning unit.

  In the bathtub cleaning system described above, when a disconnection occurs in the remote control cord connecting the control main body and the cleaning unit, communication between the control main body and the cleaning unit becomes impossible. As a result, since the control from the control main body cannot be performed on the cleaning unit side, it may happen that the detergent opening / closing valve and the cleaning opening / closing valve are stopped in an open state. When the hot water filling operation is set by operating the remote control device in this state, not only the hot water from the bath tub with water heater is supplied to the bathtub, but also the detergent solution is simultaneously discharged into the bathtub. Therefore, in Patent Document 1, the control main body unit determines whether there is a communication abnormality in the cleaning unit, and if it is determined that there is an abnormality, by prohibiting the subsequent bath operation, a detergent is accidentally removed from the cleaning unit. It is prevented from flowing into the bathtub.

Japanese Patent No. 3541622

  In the bathtub cleaning system, in addition to the water heater remote control for remotely operating the water heater, the bath cleaning system further includes a cleaning remote control for remotely operating the cleaning unit, and is configured to execute a bath cleaning operation by an input operation of the cleaning remote controller There is something that was done. In such a bathtub cleaning system, it is preferable that execution / stop of the hot water supply operation in the water heater can be selected in conjunction with the input operation of the cleaning remote controller. In this case, the water heater is in a state where the hot water supply operation can be started not only by turning on the operation switch of the washing remote controller but also the operation switch of the hot water remote controller. Therefore, the bathtub cleaning operation can be executed by turning on the cleaning switch of the cleaning remote controller thereafter.

  On the other hand, in the configuration in which the operation switch of the cleaning remote controller and the water heater are linked in this way, when the hot water temperature is set to a high temperature on the water heater remote control side, if the cleaning switch of the cleaning remote controller is turned ON, Hot water heated to a high temperature is supplied to the washing tube. As a result, hot water in a high temperature state may be ejected from the cleaning nozzle during execution of the bathtub cleaning operation.

  As a means for preventing the occurrence of such a problem, when the operation switch of the cleaning remote controller is turned ON, the control main body of the hot water heater starts hot water in the hot state when the bathtub cleaning operation is started in the current state. It is desirable to notify the user that there is a risk of squirting from the washing nozzle using a water heater remote control. This is to allow the user to recognize in advance that hot water is ejected from the cleaning nozzle and to prompt the user to lower the hot water supply set temperature.

  However, if a disconnection occurs in the remote control cord that connects the control main body of the water heater and the water heater remote control, communication between the control main body and the water heater remote control becomes impossible, so the user is notified using the water heater remote control. I can't. Therefore, when the user turns on the cleaning switch of the cleaning remote controller and starts the bathtub cleaning operation in this state, hot water unintended by the user is ejected.

  The present invention has been made to solve such a problem, and its purpose is to prevent hot water from being ejected during the bath cleaning operation even after the disconnection of the hot water heater remote control. It is providing the bathtub cleaning system which can protect a user reliably.

  A bathtub cleaning system according to the present invention includes a cleaning unit that cleans a bathtub using hot water supplied from a hot water supply device, a cleaning operation unit that generates a cleaning operation command that permits a cleaning operation of the cleaning unit, and a cleaning operation unit And a control device for generating a hot water supply operation command for accepting a cleaning operation command from the hot water supply device and permitting the hot water supply operation to the hot water supply device. The hot water supply device is connected via a communication line to a hot water supply operation unit for remotely operating the hot water supply operation, and when the hot water supply set temperature by the hot water supply operation unit exceeds the allowable temperature when receiving a hot water supply operation command In addition, the hot water supply operation unit is used to predict high temperature hot water. The control device is connected to the communication line, and diagnoses the disconnection of the hot water supply operation unit by monitoring the communication state between the hot water supply device and the hot water supply operation unit, and when the diagnosis unit diagnoses the disconnection of the hot water supply operation unit And fail-safe means for prohibiting hot water having a temperature exceeding the allowable temperature from being supplied from the hot water supply device based on the cleaning operation command.

  According to the bathtub cleaning system, the hot water supply operation is permitted to the hot water supply device in conjunction with the input operation of the cleaning operation unit, and the hot water supply during the cleaning operation is predicted using the hot water supply operation unit according to the hot water supply set temperature. In the configuration, when disconnection of the hot water supply operation unit occurs, it is prohibited to supply hot water having a temperature exceeding the allowable temperature from the hot water supply device. Thereby, even after generation | occurrence | production of the disconnection of a hot water supply operation part, a user can be reliably protected from the ejection of the hot water in the high temperature state during execution of a bathtub washing operation.

  Preferably, the fail safe means stops generating the hot water supply operation command based on the cleaning operation command when the diagnosis means diagnoses that the hot water supply operation unit is disconnected.

  In this way, when disconnection of the hot water supply operation unit occurs, the hot water supply operation of the hot water supply device is prohibited, thereby prohibiting hot water having a temperature exceeding the allowable temperature from being supplied from the hot water supply device. Thereby, even after generation | occurrence | production of the disconnection of a hot water supply operation part, a user can be reliably protected from the ejection of the hot water in the high temperature state during execution of a bathtub washing operation.

  Preferably, the fail-safe means generates a hot water supply operation command based on the cleaning operation command and sets the hot water supply set temperature to a temperature equal to or lower than an allowable temperature when the diagnosis means diagnoses that the hot water supply operation unit is disconnected.

  In this way, after the occurrence of disconnection of the hot water supply operation unit, the control device sets the hot water supply set temperature to a temperature lower than the allowable temperature instead of the hot water supply operation unit. It is prohibited to be supplied. Thereby, even after generation | occurrence | production of the disconnection of a hot water supply operation part, a user can be reliably protected from the ejection of the hot water in the high temperature state during execution of a bathtub washing operation. Moreover, since the hot water heated to the hot-water supply preset temperature is used, the inside of a bathtub can be wash | cleaned effectively.

  More preferably, the fail safe means detects a hot water supply set temperature set by the hot water supply operation unit in the previous hot water supply operation based on a communication signal between the hot water supply device and the hot water supply operation unit. The fail-safe means changes the hot-water supply set temperature to a temperature lower than the allowable temperature when the detected hot-water supply set temperature exceeds the allowable temperature, and the detected hot-water supply set temperature is lower than the allowable temperature. Maintain the hot water supply set temperature.

  If it does in this way, after generation | occurrence | production of the disconnection of a hot water supply operation part, a user can be protected from the ejection of hot water in a high temperature state.

  Preferably, the hot water supply operation unit includes a plurality of remote controls each independently connected to the hot water supply apparatus via a communication line. The diagnosis means monitors the communication state between the hot water supply device and each of the plurality of remote controllers, and diagnoses the disconnection of the hot water supply operation unit when all the communication states of the plurality of remote controllers become defective.

  If it does in this way, if at least 1 of a some remote control can be used, since a hot hot-water supply can be predicted, normal bathtub washing operation can be continued.

  ADVANTAGE OF THE INVENTION According to this invention, even after generation | occurrence | production of disconnection of a water heater remote control, a user can be reliably protected from the ejection of the hot water in the hot state during execution of a bathtub washing operation.

1 is an overall configuration diagram of a bath system to which a bathtub cleaning system according to Embodiment 1 of the present invention is applied. It is a block diagram of the washing | cleaning unit shown in FIG. It is a figure explaining the control composition of the bathtub washing system when the operation switch of the hot water heater remote control is turned on. It is a figure explaining the control composition of a bathtub washing system when the operation switch of a washing remote control is set to ON. It is the flowchart which showed the process sequence for implement | achieving the disconnection diagnostic process of the water heater remote control according to Embodiment 1 of this invention. It is a timing chart explaining operation | movement of a water heater, a water heater remote control, a control part, and a washing | cleaning remote control in the interlocking process of the operation switch of a washing remote control, and a water heater. It is the flowchart which showed the process sequence for implement | achieving the interlocking | linkage process of the operation switch of a washing | cleaning remote control and hot water supply according to Embodiment 1 of this invention, and a high temperature hot-water supply prohibition process. It is a timing chart explaining operation | movement of a water heater, a water heater remote control, a control part, and a washing | cleaning remote control in the interlocking process of the operation switch of a washing remote control, and a water heater. It is the flowchart which showed the process sequence for implement | achieving the interlocking | linkage process of the operation switch of a washing | cleaning remote control and hot water supply according to Embodiment 2 of this invention, and a high temperature hot-water supply prohibition process.

  Embodiments of the present invention will be described in detail with reference to the drawings. Note that the same or corresponding parts in the drawings are denoted by the same reference numerals and description thereof will not be repeated.

[Embodiment 1]
(Bath system configuration)
FIG. 1 is an overall configuration diagram of a bath system to which a bathtub cleaning system according to Embodiment 1 of the present invention is applied. In addition, FIG. 1 has shown the structure of the bath system when wash | cleaning a bathtub with a bathtub washing system.

  Referring to FIG. 1, the bath system includes a bathroom 2 provided inside a building 1 and a water heater 3 serving as a heat source unit. A bathtub 40 and a cleaning unit 10 are installed inside the bathroom 2. A water heater 3 is installed outside the bathroom 2 or outside the building 1. A power supply device 4 for supplying power to the cleaning unit 10 is further installed outside the bathroom 2. The power supply device 4 converts AC power supplied from a commercial power source into power suitable for driving the cleaning unit 10 and supplies the power to the cleaning unit 10.

  In the present embodiment, the configuration in which power is supplied only from the power supply device 4 to the cleaning unit 10 is illustrated. However, the power supply device 4 is supplied to each load such as the water heater 3 in addition to the cleaning unit 10. It is good also as composition to do.

  The water heater 3 is a heat source machine having a hot water supply function, a hot water filling function, and a reheating function. The water heater 3 according to the present embodiment is configured as a single can / two water type. That is, although not shown, the hot water heater 3 is configured such that a hot water heat exchanger and a bath heat exchanger are arranged in one can and heat exchange heated by a combustion burner that is a common heat source. Yes. The water heater 3 may be configured not to have a hot water filling function and a chasing function.

  The hot water heater 3 includes a water supply pipe 70 and a hot water discharge pipe 72 connected to the hot water supply heat exchanger, and a forward pipe 74 and a return pipe 76 connected between the bath heat exchanger and the circulation adapter 42 in the bathtub 40. . The water supply pipe 70 and the hot water discharge pipe 72 constitute a hot water supply pipe, and the forward pipe 74 and the return pipe 76 constitute a circulation pipe for realizing a reheating function.

  The water heater 3 receives tap water or the like from the water supply pipe 70 and causes the hot water heated to a predetermined temperature by heat exchange heating with the combustion heat of the combustion burner in the hot water supply heat exchanger to be discharged from the hot water discharge pipe 72. A hot water tap (not shown) such as a currant 73 and a shower head for hot water use is connected to the terminal of the hot water discharge pipe 72. Further, the water heater 3 can reheat the bath water returned from the bathtub 40 to the water heater 3 through the circulation line to a predetermined temperature by heat exchange heating with the combustion heat of the combustion burner in the bath heat exchanger. It is like that.

  The water heater 3 is provided with a control unit (not shown) for controlling the operation of the water heater 3, and the control unit controls hot water supply operation, hot water filling operation, reheating operation, and the like. A remote controller for remotely operating the water heater 3 (hereinafter also referred to as “water heater remote controller”) is connected to the control unit via a communication line 5. In FIG. 1, a kitchen remote controller 7 and a bathroom remote controller 9 are shown as examples of the “hot-water heater remote controller”. The kitchen remote control 7 and bathroom remote control 9 are provided with operation switches, hot water filling switches, reheating switches, touch panels, and the like. On the touch panel, an operation screen for inputting and setting a hot water supply set temperature, a hot water set temperature, and the like is displayed by performing a touch operation on the screen.

  In the bathtub 40, a circulation adapter 42 is installed at a predetermined position on the side wall thereof, and an automatic opening / closing drive control type drain plug 44 and a cleaning nozzle 60 are installed on the bottom wall. An opening / closing drive mechanism 46 and a detergent tank 50 are installed on the flange wall on the upper surface side of the bathtub 40. The circulation adapter 42 is connected to the return pipe 74 and the return pipe 76 of the circulation line, respectively. Bath water in the bathtub 40 is sucked into the return pipe 76 via the circulation adapter 42, while the return pipe 76 is connected to the bathtub 40. Bathtub water is discharged inside. The drain plug 44 performs an opening / closing operation in response to transmission of the opening / closing driving force from the opening / closing driving mechanism 46. The opening / closing drive mechanism 46 is provided with a sensor for detecting whether the drain plug 44 is open or closed, and is driven to open / close based on an output signal of the sensor and an input signal from a predetermined operation unit (not shown). The mechanism 46 controls the opening / closing operation of the drain plug 44. When the drain plug 44 is opened by the opening / closing drive mechanism 46, hot water in the bathtub 40 is discharged to the bottom of the bathroom 2 and subsequently drained from a drain port (not shown) of the bathroom 2.

(Configuration of bathtub cleaning system)
The bathtub cleaning system performs a bathtub cleaning operation for automatically cleaning the bathtub 40 by causing the cleaning unit 10 to eject hot water or detergent into the bathtub 40. In addition, you may comprise so that bathroom members, such as the wall surface and floor surface which comprise the bathroom 2, can also be wash | cleaned by installing a washing nozzle further in the wall surface or upper part of the bathroom 2. FIG.

  The bathtub cleaning system includes a cleaning nozzle 60 installed on the bottom wall of the bathtub 40, a cleaning pipe 78 for supplying hot water to the cleaning nozzle 60, a detergent supply pipe 54 for mixing detergent liquid into the hot water, and a detergent stock solution. A detergent tank 50 to be stored, a washing unit 10 provided between the water heater 3 and the bathtub 40, a control unit 100 housed in the power supply device 4, and a washing remote controller for remotely operating the washing unit 10 8.

  The cleaning nozzle 60 is installed to penetrate the bottom wall of the bathtub 40 and is configured to eject hot water or detergent liquid from a front end opening (upper surface opening) toward the inner wall of the bathtub 40 or the outside of the bathtub 40 with a predetermined range. Has been. Although only one cleaning nozzle 60 is shown in FIG. 1, two or more cleaning nozzles 60 can be installed in a predetermined arrangement depending on the size of the bathtub 40, the bathroom member to be cleaned, and the like.

  One end of the cleaning pipe 78 is connected to the cleaning nozzle 60, and the other end is connected to a connection pipe 75 drawn out from the hot water discharge pipe 72 of the water heater 3. The detergent supply pipe 54 extends from the lower part of the detergent tank 50 and is connected in the middle of the washing pipe 78. The detergent tank 50 is installed on the flange wall on the upper surface side of the bathtub 40. A detergent replenishing port exposed on the flange wall is provided at the top of the detergent tank 50.

  The cleaning unit 10 is installed on the outer periphery of the bathtub 40 and the like, receives the supply of hot water from the water heater 3, and jets detergent liquid and hot water into the bathtub 40 to automatically clean the bathtub 40. In FIG. 1, the path through which the detergent solution and hot water flow is indicated by a thick line.

  The control unit 100 includes a microcomputer, a memory, a timer, and the like (not shown). The control unit 100 controls the operation of the bathtub cleaning operation by causing the microcomputer to execute the control program for the cleaning unit 10 stored in the memory.

  The control unit 100 is connected to the communication line 5 and is configured to be capable of bidirectional communication between the control unit of the water heater 3 and the water heater remote controller (kitchen remote controller 7 and bathroom remote controller 9) via the communication line 5. The Further, a cleaning remote controller 8 for remotely operating the cleaning unit 10 is connected to the control unit 100 via a communication line 6. The control unit 100 transmits and receives various signals to and from the cleaning remote controller 8.

  When the user inputs the execution of the bathtub cleaning operation using the cleaning remote controller 8, the control unit 100 executes the bathtub cleaning process in cooperation with the control unit of the water heater 3. Note that a water heater remote controller (kitchen remote controller 7 and bathroom remote controller 9) is connected to the control unit of the water heater 3 via the communication line 5, and an input operation for hot water filling or chasing operation is performed by these remote controllers. be able to.

Hereinafter, the cleaning unit 10 will be further described with reference to FIG.
(Structure of cleaning unit)
With reference to FIG. 2, the cleaning pipe 78 includes, in order from the upstream side connected to the connection pipe 75, a water inlet fitting 12, a water governor valve 14, a thermistor 16, a water amount sensor 18, a pouring electromagnetic valve 20, and a check valve 22. The check valve 26, the check valve 24, the air release valve 28, the check valve 30, the detergent electromagnetic valve 32, and the detergent mixing part 34 are interposed.

  By connecting the connecting pipe 75 to the water fitting 12, the cleaning pipe 78 and the connecting pipe 75 are connected. Hot water supplied from the water heater 3 flows into the washing pipe 78 through the hot water outlet pipe 72. The water governor valve 14 makes the water pressure in the cleaning pipe 78 constant.

  The thermistor 16 detects the temperature of hot water flowing through the cleaning pipe 78 and outputs a detection signal to the control unit 100. The water amount sensor 18 detects the flow rate of hot water supplied from the hot water discharge pipe 72 of the water heater 3 to the cleaning pipe 78 and outputs a detection signal to the control unit 100.

  The pouring solenoid valve 20 is operated by a control command from the control unit 100 to open and close the flow path of the cleaning pipe 78. Specifically, the hot water solenoid valve 20 is opened in response to an opening command from the control unit 100, so that hot water supplied from the hot water discharge pipe 72 of the hot water heater 3 is washed through the connection pipe 75. Introduced in. Hot water introduced into the cleaning pipe 78 is controlled to a constant water pressure by the water governor valve 14, flows through the cleaning pipe 78, and is ejected from the cleaning nozzle 60 into the bathtub 40. Thereby, the rinsing washing in the bathtub 40 is performed.

  On the other hand, the hot water electromagnetic valve 20 is closed in response to a closing command from the control unit 100, whereby the supply of hot water to the cleaning pipe 78 is shut off. The pouring solenoid valve 20 is used as a representative example of an on-off valve that can open and close the flow path of the cleaning pipe 78. That is, any type of on-off valve can be used in place of the pouring electromagnetic valve 20 as long as the valve is configured to be able to be switched between full open and fully closed.

  The check valves 22 and 24 allow passage of hot water in the direction from the connection pipe 75 to the cleaning pipe 78 and disable passage of hot water in the direction from the cleaning pipe 78 to the connection pipe 75.

  The backflow prevention valve 26 is a safety device for cutting off the miscellaneous water and clean water in the bath. The backflow prevention valve 26 normally closes the overflow port due to the pressure difference between the supply water source pressure (primary pressure) and the supply destination pressure (secondary pressure). Further, the backflow prevention valve 26 is opened when negative pressure is generated on the water supply source side due to water cut or the like, and discharges miscellaneous water from the overflow port to the outside of the cleaning unit 10. The overflow port is connected to the drainage part of the cleaning unit 10 through a pipe (not shown).

  The atmosphere release valve 28 communicates with the atmosphere in the cleaning pipe 78 in a state where the cleaning water does not flow through the cleaning pipe 78, and blocks communication with the atmosphere while the cleaning water flows in the cleaning pipe 78. The check valve 30 is provided on the upstream side of the detergent mixing portion 34. The check valve 30 prevents the detergent liquid from flowing back to the upstream side.

  The detergent mixing part 34 is constituted by a venturi tube. The downstream end of the detergent supply pipe 54 is connected to the detergent mixing portion 34 in communication. The upstream end of the detergent supply pipe 54 is connected to the detergent tank 50, while the detergent solenoid valve 32 is interposed in the middle of the detergent supply pipe 54. The detergent solenoid valve 32 is operated by a control command from the control unit 100 to open and close the flow path of the detergent supply pipe 54. Specifically, when the detergent electromagnetic valve 32 is opened in response to the opening command from the control unit 100, a predetermined amount of the detergent stock solution supplied from the detergent tank 50 is supplied to the washing nozzle 60 in the detergent mixing unit 34. A detergent solution is produced by mixing with hot water passing toward the surface by a negative pressure suction action. Then, this detergent liquid is ejected from the cleaning nozzle 60 into the bathtub 40. Thereby, detergent washing in bathtub 40 is performed.

  On the other hand, the detergent electromagnetic valve 32 is closed in response to the closing command from the control unit 100, whereby the supply of the detergent stock solution to the detergent mixing unit 34 is shut off. That is, it is possible to adjust the amount of detergent supplied for one cleaning by the length of the valve opening time for opening the detergent electromagnetic valve 32. The detergent tank 50 is provided with a float switch 52 for detecting the liquid level of the detergent stock solution, and is configured to detect that the liquid level has dropped to a predetermined liquid level and to output it to the control unit 100. Has been.

  The cleaning remote controller 8 includes an operation switch, a cleaning switch, a display unit, and an audio output unit. The operation switch is a switch for selecting operation / stop of the cleaning unit 10. By setting the operation switch to “ON”, the bath cleaning operation is permitted, that is, the operation of the cleaning switch can be accepted. On the other hand, by setting the operation switch to “OFF”, the bath cleaning operation is prohibited, that is, the operation of the cleaning switch is not accepted.

  The washing switch is a switch for selecting execution / stop of the bathtub washing operation. When the washing switch is turned “ON” with the operation switch turned on, the bathtub washing operation is executed, and when the washing switch is turned “OFF”, the bathtub washing operation is stopped.

  The display unit displays the operation state (operation / stop) of the bathtub cleaning system. The display unit further displays an error code indicating the content of the error when an error occurs in the bathtub cleaning system. The sound output unit generates sound for notifying the operation state of the bathtub cleaning system such as execution / stop of the bathtub cleaning operation and the occurrence of an error in the bathtub cleaning system.

(Control configuration of bathtub cleaning system)
Next, a control configuration of the bathtub cleaning system will be described with reference to FIGS. 3 and 4.

  Referring to FIG. 3, a control unit inside hot water heater 3 (hereinafter, also simply referred to as “hot water heater 3”), a water heater remote control (kitchen remote control 7 and bathroom remote control 9), and a control unit 100 of the bathtub cleaning system are as follows: Bidirectional communication is performed via the communication line 5. Specifically, the water heater remote controls 7 and 9 generate a control command for switching the operation of the water heater 3 according to an input operation from the user, and transmit the generated control command to the water heater 3. When the water heater 3 receives control commands from the water heater remote controls 7 and 9, the water heater 3 controls the operation of the water heater 3 according to the control commands.

  The water heater 3 generates a signal (operation information) indicating the operation state of the water heater 3 and transmits the generated operation information to the water heater remote controllers 7 and 9. The operation information includes operation modes such as a hot water supply operation, a hot water filling operation, and a chasing operation, a hot water supply set temperature, a hot water set temperature, and the like. The water heater remote controls 7 and 9 display the operation state of the water heater 3 on the display unit based on the received operation information.

  For example, FIG. 3 shows a case where the operation switch of the bathroom remote control 9 is turned on in a state where the operation switches of both the water heater remote controls 7 and 9 and the washing remote control 8 are turned off. In this case, in response to the operation switch being turned on, the bathroom remote controller 9 generates a “hot water supply operation command” for permitting the hot water supply device 3 to perform the hot water supply operation. The bathroom remote controller 9 outputs the generated hot water supply operation command to the communication line 5. The hot water supply operation command output to the communication line 5 is received by the hot water heater 3, the kitchen remote controller 7, and the control unit 100.

  The water heater 3 is in a state where the hot water supply operation can be started by receiving the hot water supply operation command. When the kitchen remote controller 7 receives the hot water supply operation command, the kitchen remote controller 7 displays on the display section that the water heater 3 is ready to start the hot water supply operation.

  In the bathtub cleaning system, the control unit 100 and the cleaning remote controller 8 perform bidirectional communication via the communication line 6. Communication between the control unit 100 and the cleaning remote controller 8 is performed using a signal format different from that of the communication between the water heater 3, the water heater remote controls 7, 9 and the control unit 100. Therefore, the washing remote controller 8 cannot directly communicate with the water heater 3 and the water heater remote controllers 7 and 9.

  Therefore, as shown in FIG. 3, when a hot water supply operation command is received from the bathroom remote controller 9, the signal format of the hot water operation command is converted into a signal format that can be received by the cleaning remote controller 8, and the converted hot water supply operation command is converted to the cleaning remote controller. Send to 8. In the following description, the hot water supply operation command after conversion is also referred to as “local hot water supply operation command”. The signal transmitted from control unit 100 to cleaning remote controller 8 is limited to the local hot water supply operation command and does not include operation information such as the hot water supply set temperature.

  By receiving the local hot water supply operation command from the control unit 100, the cleaning remote controller 8 can know that the water heater 3 is in a state where the hot water supply operation can be started. The cleaning remote controller 8 displays on the display unit that the water heater 3 is in a state where the hot water supply operation can be started.

  In such a state, when the cleaning switch of the cleaning remote controller 8 is turned on or the reserved time set by the cleaning remote controller 8 is reached, the control unit 100 issues an opening command to the pouring electromagnetic valve 20 inside the cleaning unit 10. By outputting, the pouring solenoid valve 20 is opened. When the water heater 3 detects water flow exceeding a predetermined operating flow rate, the water heater 3 starts combustion of the combustion burner. Then, hot water heated to the hot water supply set temperature by heat exchange heating with the combustion heat of the combustion burner is supplied to the cleaning unit 10 via the hot water discharge pipe 72. Thereby, the bathtub cleaning operation is started.

  Next, as shown in FIG. 4, it is assumed that the operation switch of the cleaning remote controller 8 is turned on in the state where both the water heater remote controllers 7 and 9 and the cleaning remote controller 8 are turned off.

  In response to the operation switch being turned on, the cleaning remote controller 8 generates a “cleaning operation command” for permitting the cleaning unit 10 to perform the bath cleaning operation. The cleaning remote controller 8 transmits the generated cleaning operation command to the control unit 100 via the communication line 6.

  When receiving the cleaning operation command, the control unit 100 brings the cleaning unit 10 into a state where the bathtub cleaning operation is permitted. The control unit 100 further converts the signal format of the cleaning operation command into a signal format that can be received by the water heater 3 and the water heater remote controllers 7 and 9, and outputs the converted cleaning operation command to the communication line 5 as the hot water supply operation command. . That is, in other words, the cleaning operation command is a local hot water supply operation command issued from the cleaning unit 8 toward the control unit 100. The water heater 3 is in a state where it can receive the hot water operation command and start the hot water operation. In addition, when receiving the hot water supply operation command, the hot water heater remote controls 7 and 9 display on the display unit that the water heater 3 is ready to start the hot water supply operation.

  In such a state, when the cleaning switch of the cleaning remote controller 8 is turned on or when the reserved time set by the cleaning remote controller 8 is reached, the control unit 100 opens the pouring electromagnetic valve 20 inside the cleaning unit 10. When the water heater 3 detects water flow exceeding a predetermined operating flow rate, the water heater 3 starts combustion of the combustion burner, and supplies hot water heated to the hot water supply set temperature by heat exchange heating with the combustion heat of the combustion burner to the cleaning unit 10. . Thereby, the bathtub cleaning operation is started.

  As described above, in the bathtub cleaning system according to the first embodiment, when the operation switch of the cleaning remote controller 8 is turned on, the control unit 100 that has received the cleaning operation command output from the cleaning remote controller 8 causes the water heater 3 to The hot water supply operation command is output to the hot water supply device 3 so that the hot water supply operation can be started. With this configuration, when the cleaning switch of the cleaning remote controller 8 is turned on, hot water heated to the hot water supply set temperature is supplied from the water heater 3 to the cleaning unit 10. Since the dirt adhering to the inside of the bathtub 40 is easily removed by using the heated hot water, the inside of the bathtub 40 can be effectively cleaned.

<High temperature hot spring forecast processing>
Here, the cleaning remote controller 8 only has a function of remotely operating the operation / stop of the cleaning unit 10 and the execution / stop of the bath cleaning operation, and displays a function for inputting and setting a hot water supply set temperature and a hot water supply set temperature. There is something that does not have the function to do. In such a case, as shown in FIG. 4, if the hot water supply operation of the hot water heater 3 is permitted in conjunction with the operation switch of the cleaning remote controller 8 being turned on, the hot water heater 3 is connected to the previous hot water supply operation. Sometimes the hot water supply operation is started according to the hot water supply set temperature set by the hot water heater remote control 7, 9. Therefore, when the hot water supply set temperature is set to a high temperature, when the washing switch of the washing remote controller 8 is turned on and the bathtub washing operation is started, hot water in a high temperature state may be ejected from the washing nozzle 60.

  In order to prevent such hot water from being ejected, the water heater 3 uses the water heater remote controls 7 and 9 to receive a bathtub from the user when receiving a hot water operation command from the control unit 100. Predict hot hot water during washing operation.

  Specifically, when the hot water supply device 3 receives a hot water supply operation command from the control unit 100, the hot water supply device 3 acquires the hot water supply set temperature set by the hot water supply remote controllers 7 and 9 in the previous hot water supply operation. And the hot water heater 3 compares the acquired previous hot water supply set temperature with a predetermined allowable temperature, and when the hot water set temperature exceeds the allowable temperature, predicts the high temperature hot water during the bath washing operation. To do.

  Prediction of hot hot water during the bath washing operation is performed using the water heater remote controls 7 and 9. For example, the water heater 3 generates a notification sound indicating high temperature hot water from the sound output unit of the water heater remote controls 7 and 9. Alternatively, the water heater 3 displays a code indicating high temperature hot water on the display units of the water heater remote controls 7 and 9. In addition, as long as the hot water hot water forecast can be visually and / or audibly informed to the user that hot water in a hot state may be ejected when the bathtub washing operation is started, any prediction is possible. An aspect may be sufficient.

  Thus, by predicting the hot hot water supply during the bathtub cleaning operation, the user is made aware in advance that hot hot water is ejected from the cleaning nozzle 60 and prompts the user to lower the hot water supply set temperature. Can do.

  However, since the high-temperature hot water supply prediction process is performed continuously with the operation process of the operation switch of the washing remote controller 8 and the water heater 3 described above, in the state where the water heater remote controllers 7 and 9 are in communication abnormality due to disconnection, the washing Even when the operation switch of the remote control 8 is turned on, there is no way to predict the hot hot water for the user. Note that the disconnection of the water heater remote controllers 7 and 9 occurs due to disconnection of the communication line connecting the water heater remote controllers 7 and 9, poor contact, or mixing of noise into the communication line.

  In the bathtub cleaning system according to the first embodiment, the control unit 100 monitors the communication state between the water heater 3 and the water heater remote controllers 7 and 9 via the communication line 5, thereby providing the water heater remote controllers 7 and 9. Diagnose the disconnection. When it is diagnosed that the water heater remote controllers 7 and 9 are disconnected, the control unit 100 causes hot water from the hot water heater 3 to the cleaning unit 10 in the interlocking process between the operation switch of the cleaning remote controller 8 and the water heater 3. Execute fail-safe processing that prohibits supply.

<Disconnection diagnosis process for water heater remote control>
Below, the disconnection diagnosis process of the water heater remote controllers 7 and 9 will be described.

  Update in which the water heater 3 and the water heater remote controllers 7 and 9 transmit each other's operating state in order to grasp the operation state of the other party (the operating state of the water heater 3 and the setting state of the water heater remote controllers 7 and 9). I communicate regularly. The control unit 100 diagnoses disconnection of the water heater remote controllers 7 and 9 by monitoring whether or not the update communication is normally executed.

  FIG. 5 is a flowchart showing a processing procedure for realizing disconnection diagnosis processing of water heater remote controls 7 and 9 according to the first embodiment of the present invention. The flowchart shown in FIG. 5 is realized by calling a program stored in advance in the control unit 100 from the main routine and executing it at a predetermined cycle.

  Referring to FIG. 5, control unit 100 first determines in step S01 whether hot water heater remote control disconnection diagnosis flag F is set to “1”. The water heater remote control disconnection diagnosis flag F is initialized to “0” when the bathtub cleaning system is turned on. When it is diagnosed that the water heater remote control 7 or 9 is disconnected, the water heater remote control disconnect diagnosis flag F is set to “1”.

  When hot water heater remote control disconnection diagnosis flag F is set to “1” (YES in step S01), control unit 100 causes hot water heater remote controls 7 and 9 to hot water heater 3 within a predetermined period in step S02. It is determined whether there is communication. When there is communication from water heater remote controllers 7 and 9 to water heater 3 within a predetermined cycle (YES in step S02), control unit 100 does not cause disconnection of water heater remote controllers 7 and 9 in step S03 (disconnected). The water heater remote controller disconnection diagnosis flag F is switched from “1” to “0”. On the other hand, when there is no communication from water heater remote controllers 7 and 9 to water heater 3 within a predetermined cycle (NO in step S02), control unit 100 diagnoses that water heater remote controllers 7 and 9 are still disconnected. Thus, the hot water heater remote control disconnection diagnosis flag F remains “1”.

  On the other hand, when water heater remote control disconnection diagnosis flag F is set to “0” (NO in step S01), control unit 100 transmits a signal from water heater 3 in a predetermined time in step S04. Then, it is determined whether or not there is a response from the water heater remote controllers 7 and 9 to the water heater 3. When there is no response from water heater remote controls 7 and 9 within a certain time (YES in step S04), control unit 100 diagnoses that disconnection of water heater remote controls 7 and 9 has occurred in step 05 and hot water heater The remote control disconnection diagnosis flag F is switched from “0” to “1”. On the other hand, when there is a response from water heater remote controls 7 and 9 within a certain time (NO in step S04), control unit 100 diagnoses that there is no disconnection of water heater remote controls 7 and 9 and water heater remote controllers. The disconnection diagnosis flag F remains “0”.

<High temperature hot water bath prohibition treatment>
Next, with reference to FIG. 6, a fail-safe process for prohibiting hot water from being supplied to the cleaning unit 10 will be described. FIG. 6 is a timing chart for explaining operations of the water heater 3, the water heater remote controllers 7 and 9, the control unit 100, and the cleaning remote controller 8 in the interlocking process between the operation switch of the cleaning remote controller 8 and the water heater 3.

  Referring to FIG. 6, hot water heater 3 and water heater remote controls 7 and 9 periodically perform update communication. As illustrated in FIG. 5, the control unit 100 diagnoses the disconnection of the water heater remote controllers 7 and 9 by monitoring whether or not the update communication is normally performed through the communication line 5. When the update communication is normally executed, the control unit 100 diagnoses that the water heater remote control 7 or 9 is not disconnected, and sets the water heater remote control disconnection diagnosis flag F to “0”.

  When the operation switch is turned on, the cleaning remote controller 8 transmits a cleaning operation command to the control unit 100. When water heater remote control disconnection diagnosis flag F is set to “0”, that is, when there is no disconnection of water heater remote control 7, 9, controller 100 converts the received cleaning operation command into a hot water supply operation command. Then, the data is transmitted to the water heater 3 and the water heater remote controls 7 and 9.

  Upon receiving a hot water supply operation command from control unit 100, water heater 3 acquires hot water supply set temperature Tset # set by water heater remote controls 7 and 9 in the previous hot water supply operation. Then, the water heater 3 compares the acquired previous hot water set temperature Tset # with a predetermined allowable temperature Tth, and if the previous hot water set temperature Tset # exceeds the allowable temperature Tth, Using hot water remote control 7 and 9, predict hot hot water during bathtub cleaning operation. On the other hand, when the previous hot water supply set temperature Tset # is equal to or lower than the allowable temperature Tth, when the cleaning switch of the cleaning remote controller 8 is turned on, the water heater 3 supplies hot water heated up to the previous hot water supply set temperature Tset #. Supply to cleaning unit 10. The cleaning unit 10 starts the bathtub cleaning operation.

  On the other hand, when the update communication is not normally executed, that is, when there is no response from the water heater remote controllers 7 and 9 to the water heater 3, the control unit 100 causes disconnection of the water heater remote controllers 7 and 9. The water heater remote control disconnection diagnosis flag F is set to “1”.

  When the operation switch is turned on, the cleaning remote controller 8 transmits a cleaning operation command to the control unit 100. When water heater remote control disconnection diagnosis flag F is set to “1”, that is, when water heater remote control 7 or 9 is disconnected, control unit 100 proceeds to water heater 3 and water heater remote control 7 or 9. Stop sending the hot water supply operation command. Since the hot water heater 3 does not receive the hot water supply operation command from the control unit 100, the hot water supply operation is prohibited.

  When the disconnection of the water heater remote controls 7 and 9 occurs in this way, the interlocking process between the operation switch of the cleaning remote controller 8 and the water heater 3 is prohibited. As a result of the disconnection of the water heater remote controls 7 and 9, the water heater 3 uses the water heater remote controls 7 and 9 to perform the bath cleaning operation even if the previous hot water set temperature Tset # exceeds the allowable temperature Tth. It is not possible to predict hot hot water inside. If the user permits the hot water supply operation of the water heater 3 in conjunction with the operation switch of the cleaning remote controller 8 being turned on in this state, there is a possibility that hot water not intended by the user is ejected from the cleaning nozzle 60. Therefore, the control unit 100 prohibits hot water supply from the water heater 3 to the cleaning unit 10 by prohibiting the hot water supply operation itself in the water heater 3. Thereby, hot water in a high temperature state can be prevented from being ejected from the cleaning nozzle 60.

  With the control configuration as described above, the high temperature hot water prohibition process in the interlocking process between the operation switch of the cleaning remote controller 8 and the water heater 3 is realized. These processes can be summarized in the following process flow.

  FIG. 7 is a flowchart showing a processing procedure for realizing the interlocking process between the operation switch of cleaning remote controller 8 and hot water heater 3 and the high-temperature hot water prohibition process according to the first embodiment of the present invention. The flowchart shown in FIG. 7 is realized by a program stored in advance in the control unit 100 being called from the main routine and executed in a predetermined cycle.

  Referring to FIG. 7, control unit 100 first determines in step S11 whether water heater remote control disconnection diagnosis flag F is set to “0”. When water heater remote control disconnection diagnosis flag F is set to “0”, that is, when there is no disconnection of water heater remote control 7, 9 (YES in step S 11), control unit 100 switches the operation switch of cleaning remote control 8. An interlocking process with the water heater 3 is executed. Specifically, in step S12, the control unit 100 determines whether or not the operation switch of the cleaning remote controller 8 has been switched from OFF to ON based on the cleaning operation command transmitted from the cleaning remote controller 8. When the operation switch is switched from OFF to ON (YES in step S12), control unit 100 transmits a hot water supply operation command to hot water heater 3 and hot water heater remote controls 7 and 9 in step S13.

  On the other hand, when the operation switch is not switched from OFF to ON (NO in step S12), control unit 100 further determines in step S14 whether or not the operation switch is switched from ON to OFF. When the operation switch is switched from ON to OFF (YES in step S14), control unit 100 generates a “hot water supply operation OFF command” for stopping the hot water supply operation of hot water heater 3 in step S15. The control unit 100 outputs the generated hot water supply operation off command to the communication line 5. The hot water supply operation off command output to the communication line 5 is received by the water heater 3 and the water heater remote controls 7 and 9, respectively. The water heater 3 is in a state where the hot water supply operation is prohibited in accordance with the hot water supply operation off command.

  On the other hand, when water heater remote control disconnection diagnosis flag F is set to “1” (NO in step S11), control unit 100 transfers water heater 3 and water heater remote controls 7 and 9 to step S16. Stop sending hot water operation instructions. Thereby, since the hot water heater 3 does not receive the hot water supply operation command from the control unit 100, the hot water supply operation is prohibited.

  As described above, according to the bathtub cleaning system according to the first embodiment of the present invention, when the disconnection of the hot water heater remote control occurs, the hot water heater is not permitted to operate in conjunction with the ON of the operation switch of the cleaning remote controller. Prohibit hot water from being supplied to the cleaning unit. Thereby, a user can be reliably protected from the ejection of the hot water in the high temperature state during execution of the bathtub washing operation.

[Embodiment 2]
In the bathtub cleaning system according to the first embodiment of the present invention described above, a configuration has been described in which the interlocking process between the operation switch of cleaning remote controller 8 and water heater 3 is prohibited when a disconnection of water heater remote controllers 7 and 9 is diagnosed. . However, in the above configuration, since water supply such as tap water is supplied from the water heater 3 to the cleaning unit 10 without being subjected to heat exchange heating during execution of the bathtub cleaning operation, dirt attached to the bathtub 40 is not easily removed. Therefore, there is a concern that the cleaning capability of the cleaning unit 10 may be reduced.

  In Embodiment 2 of the present invention, when it is diagnosed that the water heater remote controls 7 and 9 are disconnected, the interlocking operation between the operation switch of the cleaning remote controller 8 and the water heater 3 is permitted, and the control unit 100 performs the bath cleaning operation. A configuration for setting the hot water supply set temperature during execution will be described.

  Since the overall configuration of the bathtub cleaning system according to the second embodiment of the present invention is the same as that of FIG. 1, detailed description will not be repeated. Further, the control configuration of the bathtub cleaning system is the same as that of FIGS. 3 and 4 except for the control of the control unit 100 when the hot water heater remote control 7 or 9 is disconnected, and thus detailed description thereof will not be repeated.

  Hereinafter, a fail-safe process for prohibiting high-temperature hot water from being supplied to the cleaning unit 10 in Embodiment 2 of the present invention will be described. FIG. 8 is a timing chart for explaining operations of the water heater 3, the water heater remote controllers 7 and 9, the control unit 100, and the cleaning remote controller 8 in the interlocking process between the operation switch of the cleaning remote controller 8 and the water heater 3. The operations of the water heater 3, the water heater remote controllers 7, 9, the control unit 100, and the cleaning remote controller 8 when the disconnection of the water heater remote controllers 7, 9 is not the same as in FIG. Will not repeat.

  Referring to FIG. 8, when update communication between water heater 3 and water heater remote controllers 7 and 9 is not normally executed, that is, when there is no response from water heater remote controllers 7 and 9 to water heater 3, The control unit 100 diagnoses that the disconnection of the water heater remote controllers 7 and 9 has occurred, and sets the water heater remote controller disconnection diagnosis flag F to “1”.

  When the operation switch is turned on, the cleaning remote controller 8 transmits a cleaning operation command to the control unit 100. When water heater remote control disconnection diagnosis flag F is set to “1”, that is, when water heater remote control 7, 9 is disconnected, control unit 100 transmits a hot water supply operation command to water heater 3. Then, the hot water supply set temperature Tset is set to a temperature equal to or lower than the allowable temperature Tth and transmitted to the water heater 3.

  Specifically, the control unit 100 sets the hot water supply set temperature set by the hot water heater remote control 7 or 9 in the previous hot water supply operation based on a signal exchanged between the water heater 3 and the hot water heater remote control 7 or 9. Get Tset #. Then, control unit 100 compares the acquired previous hot water supply set temperature Tset # with a predetermined allowable temperature Tth, and sets hot water supply set temperature Tset to a temperature equal to or lower than allowable temperature Tth based on the comparison result.

  The water heater 3 is in a state where the hot water supply operation can be started by receiving the hot water supply operation command from the control unit 100. Then, when the cleaning switch of the cleaning remote controller 8 is turned on or the reserved time set by the cleaning remote controller 8 is reached, the control unit 100 opens the pouring electromagnetic valve 20 inside the cleaning unit 10. When the water heater 3 detects water flow exceeding a predetermined operating flow rate, the water heater 3 starts combustion of the combustion burner, and supplies hot water heated to the hot water supply set temperature Tset by heat exchange heating with the combustion heat of the combustion burner to the cleaning unit 10. To do. Thereby, the bathtub cleaning operation is started.

  When the disconnection of the water heater remote controllers 7 and 9 occurs in this way, the hot water supply operation of the water heater 3 is permitted in conjunction with the operation switch of the cleaning remote controller 8 being turned ON, and the control unit 100 is in the bathtub cleaning operation. A hot water supply set temperature Tset is set. Accordingly, since the bathtub cleaning operation is executed using the hot water heated to the hot water supply set temperature Tset, the hot water in the high temperature state is supplied to the cleaning unit 10 while ensuring the cleaning capability of the cleaning unit 10. Can be banned.

  With the control configuration as described above, the high temperature hot water prohibition process in the interlocking process between the operation switch of the cleaning remote controller 8 and the water heater 3 is realized. These processes can be summarized in the following process flow.

  FIG. 9 is a flowchart showing a processing procedure for realizing the interlocking process between the operation switch of cleaning remote controller 8 and hot water heater 3 and the high-temperature hot water discharge prohibiting process according to the second embodiment of the present invention. Note that the flowchart shown in FIG. 9 is realized by a program stored in advance in the control unit 100 being called from the main routine and executed in a predetermined cycle.

  The flowchart shown in FIG. 9 is different from the flowchart shown in FIG. 7 in that steps S17 to S20 are provided instead of the process of step S16. Since the processing in steps S11 to S15 is the same as that in FIG. 7, detailed description will not be repeated.

  Referring to FIG. 9, when water heater remote control disconnection diagnosis flag F is set to “1”, that is, when water heater remote controls 7 and 9 are disconnected (NO in step S <b> 11), control unit 100. In step S17, it is determined whether or not the operation switch of the cleaning remote controller 8 has been switched from OFF to ON. When the operation switch has not been switched from OFF to ON (NO in step S17), control unit 100 further determines in step S14 whether or not the operation switch has been switched from ON to OFF. When the operation switch is switched from ON to OFF (YES in step S14), control unit 100 generates a hot water supply operation OFF command and outputs it to communication line 5 in step S15. The water heater 3 is in a state where the hot water supply operation is prohibited in accordance with the hot water supply operation off command.

  In contrast, when the operation switch of cleaning remote controller 8 is switched from OFF to ON (YES in step S17), control unit 100 proceeds to step S18 and sets hot water set temperature Tset # and allowable temperature in the previous hot water supply operation. Tth is compared, and hot water set temperature Tset is set according to the comparison result. Specifically, when previous hot water supply set temperature Tset # is a temperature exceeding allowable temperature Tth (YES in step S18), control unit 100 at step S19 sets reference temperature set in advance as hot water supply set temperature Tset. Set to Tstd. This reference temperature Tstd is a temperature that is equal to or lower than the allowable temperature Tth, and corresponds to, for example, a temperature set as a default value of the hot water supply temperature in the hot water heater 3. Control unit 100 transmits hot water supply operation command and hot water supply set temperature Tset to water heater 3. The water heater 3 is in a state where the hot water supply operation can be started by receiving the hot water supply operation command. When the washing switch of the washing remote control 8 is turned on and the bathtub washing operation is started, the hot water heated to the hot water supply set temperature Tset is supplied to the washing unit 10.

  In contrast, when previous hot water supply set temperature Tset # is equal to or lower than allowable temperature Tth (NO in step S18), control unit 100 changes hot water supply set temperature Tset to previous hot water supply set temperature Tset # in step S20. Set to a temperature equal to. This is to avoid a wasteful change in the hot water supply set temperature unexpected by the user. Control unit 100 transmits hot water supply operation command and hot water supply set temperature Tset to water heater 3. The water heater 3 is in a state where it can receive the hot water operation command and start the hot water operation. When the cleaning switch of the cleaning remote controller 8 is turned on and the bath cleaning operation is started, hot water heated to the hot water supply set temperature Tset (= Tset #) is supplied to the cleaning unit 10.

  As described above, according to the bathtub cleaning system according to the second embodiment of the present invention, when the disconnection of the water heater remote control occurs, the water heater 3 is permitted to perform the hot water supply operation in conjunction with the ON of the operation switch of the cleaning remote controller, and the hot water supply setting is performed. By setting the temperature to a temperature below the allowable temperature, it is prohibited to supply hot water from the water heater to the cleaning unit. Thereby, a user can be reliably protected from the ejection of the hot water in the high temperature state during execution of bathtub cleaning operation, ensuring the washing | cleaning capability of a washing | cleaning unit.

  In the first and second embodiments described above, the kitchen remote controller 7 and the bathroom remote controller 9 which are hot water heater remote controllers correspond to the “hot water operation section”, and the cleaning remote controller 8 corresponds to the “cleaning operation section”. The control unit 100 implements a “control device”.

  In the above-described first and second embodiments, the configuration in which the high-temperature hot water prohibition processing is executed as the fail-safe processing when the disconnection of the hot water heater remote control occurs has been described. However, this configuration is the kitchen remote control 7 that is a hot water heater remote control. What is necessary is just to apply when both the bathroom remote control 9 and a disconnection generate | occur | produce. This is because when the disconnection occurs only in one of the kitchen remote controller 7 and the bathroom remote controller 9, the water heater 3 can predict the hot hot water using the other normal remote controller.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  1 building, 2 bathroom, 3 water heater, 4 power supply, 5, 6 communication line, 7 kitchen remote control (water heater remote control), 8 washing remote control, 9 bathroom remote control (water heater remote control), 10 washing unit, 12 water fitting, 14 Water governor valve, 16 Thermistor, 18 Water sensor, 20 Pouring solenoid valve, 22, 24, 30 Check valve, 26 Backflow prevention valve, 28 Air release valve, 32 Detergent solenoid valve, 34 Detergent mixing part, 40 Bathtub, 42 Circulation adapter, 44 Drain plug, 46 Opening / closing drive mechanism, 50 Detergent tank, 52 Float switch, 54 Detergent supply pipe, 60 Washing nozzle, 70 Water supply pipe, 72 Hot water pipe, 73 Karan, 74 Outward pipe, 75 Connection pipe, 76 Return pipe, 78 cleaning pipe, 100 control unit.

Claims (5)

A washing unit for washing the bathtub using hot water supplied from a hot water supply device;
A cleaning operation section for generating a cleaning operation command permitting the cleaning operation of the cleaning unit;
A controller for generating a hot water supply operation command for accepting the cleaning operation command from the cleaning operation unit and allowing the hot water supply device to perform a hot water supply operation;
The hot water supply device is connected via a communication line to a hot water supply operation unit for remotely operating the hot water supply operation, and a hot water supply set temperature by the hot water supply operation unit when the hot water supply operation command is received exceeds an allowable temperature. When it is temperature, the hot water supply operation unit is used to predict hot hot water,
The controller is
A diagnostic unit connected to the communication line and diagnosing disconnection of the hot water supply operation unit by monitoring a communication state between the hot water supply device and the hot water supply operation unit;
Fail-safe means for prohibiting hot water having a temperature exceeding the allowable temperature from being supplied from the hot-water supply device based on the cleaning operation command when the diagnostic means diagnoses a disconnection of the hot-water supply operation unit, Bathtub cleaning system.   2. The bathtub cleaning system according to claim 1, wherein the fail-safe unit stops generating the hot water supply operation command based on the cleaning operation command when the diagnosis unit diagnoses the disconnection of the hot water supply operation unit.   The fail-safe means generates the hot-water supply operation command based on the cleaning operation command and sets the hot-water supply set temperature to a temperature equal to or lower than the allowable temperature when the diagnostic means diagnoses a disconnection of the hot-water supply operation unit. The bathtub cleaning system according to claim 1. The failsafe means is:
Based on a communication signal between the hot water supply device and the hot water supply operation unit, the hot water supply set temperature set by the hot water supply operation unit in the previous hot water supply operation is detected,
When the detected hot water supply set temperature is a temperature exceeding the allowable temperature, the hot water supply set temperature is changed to a temperature equal to or lower than the allowable temperature,
The bathtub cleaning system according to claim 3, wherein the hot water supply set temperature is maintained when the detected hot water supply set temperature is equal to or lower than the allowable temperature. The hot water supply operation unit includes a plurality of remote controllers each independently connected to the hot water supply device via the communication line,
The diagnosis unit monitors a communication state between the hot water supply device and each of the plurality of remote controllers, and diagnoses a disconnection of the hot water supply operation unit when all communication states of the plurality of remote controllers become defective. Item 5. The bathtub cleaning system according to any one of Items 1 to 4.

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